1. A multi-speed power take off system, characterized by: comprises a shell, a driving mechanism, a speed change mechanism and a gear shift mechanism;

the speed change mechanism comprises a shift shaft, a shifting fork shaft, a first transmission shaft and a second transmission shaft which are parallel to each other, a plurality of groups of gear sets with different transmission ratios are arranged on the first transmission shaft and the second transmission shaft, a plurality of shifting forks for driving different gear sets to be matched for transmission are arranged on the shifting fork shaft, and the shifting fork is driven to move axially along the shifting fork shaft when the shift shaft rotates;

an output shaft of the driving mechanism is connected with the first transmission shaft and synchronously rotates;

the gear shifting mechanism comprises a rotating shaft, a rotating spring, a poking plate and a gear shifting disc fixed at one end of a gear shifting shaft, wherein the rotating shaft is rotatably connected to the shell, and a plurality of poking columns are uniformly arranged on the circumference of one end face of the gear shifting disc; the shifting plate is arranged on the rotating shaft and synchronously rotates along with the rotating shaft, the rotating spring drives the shifting plate to reset, two shifting rods are arranged on the shifting plate, the two shifting rods respectively shift the gear shifting disc to rotate in two directions through shifting columns, a plurality of gear grooves are formed in the side surface of the gear shifting disc, and a limiting plate is arranged on one side of the gear shifting disc; one end of the limiting plate is hinged to the shell, the hinged shaft is parallel to the axis of the gear shifting disc, and the other end of the limiting plate is elastically pressed in the gear groove; the two shifting rods shift the shifting columns on the two sides of the shifting column farthest from the rotating shaft.

2. A multi-speed power take off system as defined in claim 1, wherein: the poking plate is connected to the rotating shaft in a sliding mode along the axial direction of the rotating shaft, and a pressing spring and a fixing ring for limiting the axial movement of the poking plate are further arranged on the rotating shaft.

3. A multi-speed power take off system as defined in claim 1, wherein: a first driving gear, a sixth driving gear, a fourth driving gear, a fifth driving gear, a seventh driving gear, a third driving gear and a second driving gear are sequentially arranged on the first transmission shaft along the axial direction of the first transmission shaft; a first driven gear, a sixth driven gear, a fourth driven gear, a fifth driven gear, a seventh driven gear, a third driven gear and a second driven gear are sequentially arranged on the second transmission shaft along the axial direction of the second transmission shaft;

the first driving gear, the second driving gear, the third driving gear, the fourth driving gear and the fifth driving gear rotate along with the first transmission shaft; the sixth driving gear and the seventh driving gear are axially fixed on the first transmission shaft and rotate relative to the first transmission shaft; the first driven gear, the second driven gear, the third driven gear, the fourth driven gear and the fifth driven gear are axially fixed on the second transmission shaft and rotate relative to the second transmission shaft, and the sixth driven gear and the seventh driven gear drive the second transmission shaft to rotate and are connected to the second transmission shaft in a sliding manner;

the fourth driving gear and the fifth driving gear are fixed with each other and are connected to the first transmission shaft in a sliding manner, and transmission teeth capable of driving the sixth driving gear wheel and the seventh driving gear wheel are respectively arranged on two opposite sides of the fourth driving gear and the fifth driving gear; two sides of the sixth driven gear are respectively provided with a transmission gear which can be connected to the first driven gear and the fourth driven gear; two sides of the seventh driven gear are respectively provided with transmission teeth which can be connected to the fifth driven gear and the third driven gear; a toggle ring which is connected to the second transmission shaft in a sliding manner and can drive the second transmission shaft to rotate is further arranged on one side of the second driven gear, and transmission teeth which can be connected to the second driven gear are arranged on one side of the toggle ring;

the four shifting forks are respectively driven by the four shifting forks to move along the axial direction of the shifting fork shaft; and one of the gear shifting shafts drives four shifting forks to move and reset.

4. A multi-speed power take off system as defined in claim 3, wherein: the number of teeth of the gear on the second transmission shaft is reduced from the first driven gear, the second driven gear, the third driven gear, the fourth driven gear, the fifth driven gear, the sixth driven gear to the seventh driven gear in sequence.

5. A multi-speed power take off system as defined in claim 1, wherein: the shifting device is characterized in that the rotating shaft is further sleeved with a positioning plate which rotates synchronously with the shifting plate, the positioning plate and the shifting columns are located on the same plane, two positioning rods are arranged on the positioning plate, the included angle between the positioning rods is larger than that between the shifting rods, the shifting rods shift the shifting disc to enable one shifting column to reach the position of an adjacent shifting column, and then the positioning rods are inserted between the other two shifting columns and limit the rotation of the shifting disc.

6. A multi-speed power take off system as defined in claim 5, wherein: the poking plate and the poking column are not on the same plane, and the poking plate and the poking column are located on the same plane; and the rotating shaft is provided with a telescopic spring which elastically presses the poking plate on the positioning plate.

7. A multi-speed power take off system as defined in claim 6, wherein: the rotary spring is a torsion spring, the rotary spring is sleeved on the rotary shaft, one end of the rotary spring extends to the same plane to the other end of the rotary spring, the poking plate and the positioning plate are driven to synchronously rotate through a poking pin parallel to the rotary shaft, the poking pin is located between the two end portions of the rotary spring, and a stop block fixedly arranged on the shell is further arranged between the two end portions of the rotary spring.

8. A multi-speed power take off system as defined in claim 7, wherein: the positioning plate is connected with the shell through a torsion spring, and the torsion transmitted to the gear shifting disc by the torsion spring between the positioning plate and the shell is smaller than the torque of the rotary spring.

9. A multi-speed power take off system as defined in claim 8, wherein: a plurality of shifting grooves are formed outside the shifting shaft, one end of the shifting fork is connected in the shifting grooves in a sliding mode, and the side wall of each shifting groove is provided with a recess and a protrusion along the axial direction of the shifting shaft; each of the recesses and the protrusions is axially opposite one of the toggle columns along the shift shaft.

10. A multi-speed power take off system as defined in claim 9, wherein: a cavity is formed in the gear shifting shaft, and a plurality of through holes are formed in the side wall between the gear grooves.

Background

The engine and the gear box of the motorcycle are the most main power mechanism and transmission speed change mechanism on the motorcycle, and are the most main part of the power output of the motorcycle. The output shaft of the engine is in transmission connection with the input shaft of the gearbox through splines, a plurality of groups of gear sets with different transmission ratios are generally arranged in the gearbox, and shifting transmission is realized through shifting fork switching.

However, the existing power output system is not compact enough in structure, and the number of gear shifting is limited under the influence of a gear shifting structure, so that the speed difference of each gear shifting is large, and the gear shifting is not smooth enough.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a multi-gear power output system, which solves the problems that the structure of a power system is not compact enough and the number of gear shifting is limited in the prior art.

According to an embodiment of the present invention, a multi-speed power output system includes a housing, a drive mechanism, a transmission mechanism, and a shift mechanism;

the speed change mechanism comprises a shift shaft, a shifting fork shaft, a first transmission shaft and a second transmission shaft which are parallel to each other, a plurality of groups of gear sets with different transmission ratios are arranged on the first transmission shaft and the second transmission shaft, a plurality of shifting forks for driving different gear sets to be matched for transmission are arranged on the shifting fork shaft, and the shifting fork is driven to move axially along the shifting fork shaft when the shift shaft rotates;

an output shaft of the driving mechanism is connected with the first transmission shaft and synchronously rotates;

the gear shifting mechanism comprises a rotating shaft, a rotating spring, a poking plate and a gear shifting disc fixed at one end of a gear shifting shaft, wherein the rotating shaft is rotatably connected to the shell, and a plurality of poking columns are uniformly arranged on the circumference of one end face of the gear shifting disc; the shifting plate is arranged on the rotating shaft and synchronously rotates along with the rotating shaft, the rotating spring drives the shifting plate to reset, two shifting rods for shifting the shifting column towards two directions are arranged on the shifting plate respectively, a plurality of gear grooves are formed in the side surface of the gear shifting disc, and a limiting plate is arranged on one side of the gear shifting disc; one end of the limiting plate is hinged to the shell, the hinged shaft is parallel to the axis of the gear shifting disc, and the other end of the limiting plate is elastically pressed in the gear groove; the two shifting rods shift the shifting columns on the two sides of the shifting column farthest from the rotating shaft.

Compared with the prior art, the invention has the following beneficial effects: the driving mechanism and the speed change mechanism are arranged through the same shell, and the accommodating cavity for accommodating the gear shift mechanism is arranged in the shell, so that the integral structure is compact, and the operation is stable. A gear shifting disc is arranged, gear shifting is realized through rotation, and the number of shifting columns and gear slots can be selected according to actual needs so as to be suitable for more gear adjustment; the limiting plate ensures elastic adjustment and ensures the accuracy of each gear shift and the stability after the gear shift.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the internal structure of the accommodating chamber.

Fig. 3 is a schematic view of the internal structure of the accommodating chamber and the housing in which the accommodating chamber is located.

Fig. 4 is a schematic structural view of the transmission mechanism and the shift mechanism.

FIG. 5 is a schematic view of the shift shaft and the fork shaft in engagement.

Fig. 6 is a schematic diagram of the engagement of the fork shaft, the first transmission shaft and the second transmission shaft.

FIG. 7 is a schematic view of a shift mechanism.

FIG. 8 is a side view showing the positional relationship of the return spring, the tumbler pin and the stopper.

Fig. 9 is a plan view showing a positional relationship among the return spring, the tumbler pin, and the stopper.

Fig. 10 is a schematic view showing a positional relationship between the shift dial and the stopper plate.

Fig. 11 is a schematic view of the structure of the toggle plate.

Fig. 12 is a schematic end view of the sensing block.

Fig. 13 is a schematic view of the fit relationship between the first transmission shaft and the second transmission shaft.

FIG. 14 is a schematic view of the fourth driving gear and the fifth driving gear.

Fig. 15 is a schematic structural view of a sixth driven gear.

Fig. 16 is a schematic view of a toggle ring structure.

Fig. 17 is a schematic end view of the first driven gear.

In the above drawings: 100. a housing; 101. an accommodating chamber; 102. a stopper; 200. a first drive shaft; 201. a first drive gear; 202. a second driving gear; 203. a third driving gear; 204. a fourth driving gear; 205. a fifth driving gear; 206. a sixth driving gear; 207. a seventh drive gear; 300. a second drive shaft; 301. a first driven gear; 302. a second driven gear; 303. a third driven gear; 304. a fourth driven gear; 305. a fifth driven gear; 306. a sixth driven gear; 307. a seventh driven gear; 308. a dial ring; 400. a shift shaft; 401. a shift dial; 402. shifting the column; 403. a gear shifting groove; 404. recessing; 405. a protrusion; 406. a limiting plate; 407. an induction block; 408. a through hole; 409. a gear groove; 410. rolling the sheet; 411. sensing points; 500. a fork shaft; 501. a shifting fork; 502. a fork column; 600. a rotating shaft; 601. a return spring; 602. a poking plate; 603. positioning a plate; 604. a deflector rod; 605. positioning a rod; 606. a compression spring; 607. a toggle pin; 700. a drive shaft; 701. mounting a spline; 800. and a transmission gear.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

As shown in fig. 1, an embodiment of the present invention provides a multi-gear power output system, which includes a housing 100, a driving mechanism, a transmission mechanism, and a shift mechanism;

as shown in fig. 4, the speed change mechanism includes a shift shaft 400, a fork shaft 500, a first transmission shaft 200 and a second transmission shaft 300 which are parallel to each other, a plurality of sets of gear sets with different transmission ratios are disposed on the first transmission shaft 200 and the second transmission shaft 300, a plurality of shifting forks 501 for driving different gear sets to cooperate to transmit are disposed on the fork shaft 500, and the shift shaft 400 drives the shifting forks 501 to move axially along the fork shaft 500 when rotating;

an output shaft of the driving mechanism is connected with the first transmission shaft 200 and synchronously rotates;

as shown in fig. 2, 3 and 7-11, an accommodating cavity 101 for accommodating a gear shifting mechanism is formed in the housing 100, the gear shifting mechanism includes a rotating shaft 600, a rotating spring 601, a shifting plate 602 and a gear shifting plate 401 fixed at one end of a gear shifting shaft 400, the rotating shaft 600 is rotatably connected to the housing 100, and a plurality of shifting posts 402 are uniformly arranged on the circumference of one end face of the gear shifting plate 401; the shifting plate 602 is arranged on the rotating shaft 600 and rotates synchronously with the rotating shaft 600, the rotating spring 601 drives the shifting plate 602 to reset, two shifting rods 604 for shifting the shifting column 402 towards two directions are arranged on the shifting plate 602, a plurality of gear grooves 409 are arranged on the side surface of the gear shifting plate, and a limiting plate 406 is arranged on one side of the gear shifting plate; one end of the limit plate 406 is hinged to the housing 100, the hinge shaft is parallel to the axis of the shift plate 401, and the other end of the limit plate 406 is elastically pressed in the shift groove 409; two of the levers 604 move the toggle posts 402 on both sides of the toggle post 402 farthest from the pivot shaft 600.

The housing 100 is used to house and mount the drive mechanism, transmission mechanism and shift mechanism, and includes both directly viewable product surface portions and internal structures that extend to accommodate the mounting and sealing needs of the product internal structures. The shape of the housing 100 may be adaptively changed according to the space occupied by the internal structure. The driving mechanism can be a fuel engine, and can also be a common mechanism for providing power for rotation, such as a motor. The rotary shaft 600 itself is rotated by a driving mechanism such as a pedal or a motor provided specially for the pedal to be shifted automatically. The toggle posts 402 are axially disposed raised structures on the end surface of the shift disk 401 and are evenly disposed around the circumference of one of the end surfaces of the shift disk 401. When the shifting plate 602 rotates in different directions, the two shifting rods 604 respectively shift the gear shifting plate 401 to rotate in different directions. The distance between the toggle columns 402 and the radius of the circle are selected according to actual needs and installation space, and the position of the toggle rod 604 relative to the rotating shaft 600 is reasonably selected according to the position of the toggle columns 402.

As described in the above scheme, the working principle of the present invention is as follows: after the power is output from the driving mechanism, the power is directly transmitted to the first transmission shaft 200, the first transmission shaft 200 transmits the power to the second transmission shaft 300 for output, and gear sets with different transmission ratios are arranged on the first transmission shaft 200 and the second transmission shaft 300; between the gear sets, the shifting plate 602 drives the shifting plate 401 to rotate, and further drives the shifting shaft 400 to rotate to realize switching. The driving mechanism and the speed change mechanism are arranged through the same shell 100, and the accommodating cavity 101 is positioned between the driving mechanism and the speed change mechanism and is not communicated with the driving mechanism or the part where the speed change mechanism is positioned. Meanwhile, the flat-sheet gear shifting mechanism occupying less axial space is conveniently integrated into the shell 100, so that the overall structure is compact and the stability is good.

In one embodiment, as shown in fig. 5, 6 and 13-17, the transmission mechanism is configured as a seven-speed transmission structure, and the first transmission shaft 200 is provided with a first driving gear 201, a sixth driving gear 206, a fourth driving gear 204, a fifth driving gear 205, a seventh driving gear 207, a third driving gear 203 and a second driving gear 202 along an axial direction thereof in sequence; the second transmission shaft 300 is provided with a first driven gear 301, a sixth driven gear 306, a fourth driven gear 304, a fifth driven gear 305, a seventh driven gear 307, a third driven gear 303 and a second driven gear 302 along the axial direction;

the first driving gear 201, the second driving gear 202, the third driving gear 203, the fourth driving gear 204 and the fifth driving gear 205 rotate along with the first transmission shaft 200; the sixth driving gear 206 and the seventh driving gear 207 are axially fixed on the first transmission shaft 200 and rotate relative to the first transmission shaft 200; the first driven gear 301, the second driven gear 302, the third driven gear 303, the fourth driven gear 304 and the fifth driven gear 305 are axially fixed on the second transmission shaft 300 and rotate relative to the second transmission shaft 300, and the sixth driven gear 306 and the seventh driven gear 307 can drive the second transmission shaft 300 to rotate and be connected to the second transmission shaft 300 in a sliding manner. The connection of sliding and driving rotation may be achieved by a clearance fit key or spline connection.

The fourth driving gear 204 and the fifth driving gear 205 are fixed to each other and slidably connected to the first transmission shaft 200, and transmission teeth 800 capable of driving the sixth driving gear 206 and the seventh driving gear 207 are respectively disposed on two opposite sides of the fourth driving gear 204 and the fifth driving gear 205; the two sides of the sixth driven gear 306 are respectively provided with a transmission gear 800 which can be connected to the first driven gear and the fourth driven gear 304; the two sides of the seventh driven gear 307 are respectively provided with a transmission gear 800 which can be connected to the fifth driven gear 305 and the third driven gear 303; a toggle ring 308 slidably connected to the second transmission shaft 300 and capable of driving the second transmission shaft 300 to rotate is further disposed on one side of the second driven gear 302, and a transmission gear 800 capable of being connected to the second driven gear 302 is disposed on one side of the toggle ring 308. In practice, the fourth driving gear 204 and the fifth driving gear 205 are directly connected to form a whole.

The four shifting forks 501 are connected to the shifting fork shaft 500 in a sliding manner, and the four shifting forks 501 respectively drive the fourth driving gear 204, the sixth driven gear 306, the seventh driven gear 307 and the shifting ring 308 to move axially along the shifting fork shaft 500; the shift shaft 400 selects one to drive four shifting forks 501 to move and reset. The fourth driving gear 204, the sixth driven gear 306 and the seventh driven gear 307 are driven bidirectionally, and in the state shown in the figure, the driving gear can move leftwards or rightwards and then reset; the toggling of the toggle ring 308 may be unidirectional, resetting only after moving to the right.

The gear shifting shaft 400 drives the shifting fork 501 to shift to change the position of the transmission teeth 800, and gear sets with different transmission ratios are used for connecting and transmitting the first transmission shaft 200 and the second transmission shaft 300, so that multi-gear transmission is realized. When the transmission is not involved, each transmission tooth 800 and the gear matched with the transmission tooth are not connected for synchronous rotation, and the gear set idles. Through the switching of the gear sets with different transmission ratios, seven-gear speed change is realized, the gears are more, the gear shift is smoother, and the driving experience is good. In addition, the first transmission shaft 200 and the second transmission shaft 300 are respectively provided with a shifting structure matched with the shifting fork 501, so that the problem of over-crowding in installation on the same shaft is avoided.

The shift shaft 400 only drives one fork 501 to move and reset at a time, and drives different forks 501 to move and reset in sequence when the shift plate 401 rotates a full circle. In order to achieve the above effect, a plurality of shift grooves 403 are formed outside the shift shaft 400, one end of the shift fork 501 is slidably connected in the shift grooves 403, and two side walls of the shift grooves 403 are provided with opposite protrusions 405 and recesses 404; each of the recesses 404 and the protrusions 405 is axially opposite one of the toggle posts 402 along the shift spindle 400. Through sunken 404 and protruding 405 drive shift fork 501 that corresponds respectively with gear groove 409, when accomplishing the switching of shift fork 501, can also conveniently fix a position, guarantee the accuracy of switching position. Specifically, four shift grooves 403 are annularly arranged around the axis of the shift shaft 400 outside the shift shaft 400; wherein each side wall of the three shift grooves 403 is provided with a recess 404 and a protrusion 405, the two side walls of the other shift groove are respectively provided with a recess 404 and a protrusion 405, the recesses 404 and the protrusions 405 on the two side walls of the same shift groove 403 correspond to each other, and the recesses 404 and the protrusions 405 on the same side of all the shift grooves 403 are alternately arranged in the circumferential direction of the shift spindle 400; a shifting fork column 502 is arranged on each of the four shifting forks 501; each fork column 502 is slidably connected in a shift slot 403. The number of teeth of the gears on the second transmission shaft 300 is reduced in order from the first driven gear 301, the second driven gear 302, the third driven gear 303, the fourth driven gear 304, the fifth driven gear 305, the sixth driven gear 306 to the seventh driven gear 307. The gears with different sizes are reasonably arranged by the aid of the arrangement, so that the centers of gravity of the gears on the first transmission shaft 200 and the second transmission shaft 300 are close to the middle positions of the first transmission shaft 200 and the second transmission shaft 300, and the whole transmission device is stable in operation.

In practice, when neutral is calculated, the central angle of the circular ring portion of the shift groove 403 occupied by each recess 404 or protrusion 405 is 45 °, and the space allocated to each shift groove 409 by the shift disk 401 is also 45 °. As shown in fig. 12, an induction block 407 is disposed at one end of the shift shaft 400, the induction block 407 is disposed near the end of the shift shaft 400 and coaxial with the shift shaft 400, and eight induction points 411 uniformly disposed on the same circumference are disposed on the induction block 407; the shift shaft 400 is provided with a sensing hole on the same circumference as the sensing point 411. The induction block 407 is fixed with the reduction box housing 100, is connected with the control part, does not rotate along with the shift shaft 400, each induction point 411 corresponds to one gear, and the current gear can be judged through the induction points 411 corresponding to the induction holes so as to give feedback to a driver. The diameter of the shift shaft 400 is large, so that a cavity is formed inside the shift shaft 400, and a plurality of through holes 408 are formed in the side wall between the gear grooves 409, so that the overall weight of the shift shaft 400 is reduced.

As shown in fig. 7-11, in the gear shifting mechanism, a positioning plate 603 that rotates synchronously with the toggle plate 602 is further sleeved on the rotating shaft 600, the positioning plate 603 and the toggle columns 402 are located on the same plane, two positioning rods 605 are arranged on the positioning plate 603, an included angle between the positioning rods 605 is larger than an included angle between the toggle rods 604, the toggle rods 604 toggle the gear shifting disc 401 to enable one of the toggle columns 402 to be located at the position of the adjacent toggle column 402, and then the positioning rods 605 are inserted between the other two toggle columns 402 and limit the rotation of the gear shifting disc 401.

The working principle of the gear shifting mechanism with the positioning plate 603 is as follows: in a normal driving state, the shift plate 401 is located right in the middle between the two shift levers 604 and the two positioning levers 605; when the gear is shifted in the forward direction, the external force drives the rotating shaft 600 to rotate clockwise, the shifting lever 604 contacts with the shifting post 402 on the left side of the shifting post 402 at the farthest position to start shifting, the limiting plate 406 elastically yields until the gear shifting is completed in the state shown in fig. 2, and at this time, the positioning rod 605 is located between two shifting posts 402 and limits the shifting disk to rotate again. After the external force is over, the reversing is started under the action of the rotary spring 601, at this time, the positioning rod 605 rotates anticlockwise and contacts with the toggle column 402 on the left side, at this time, the restoring force is larger than the resistance brought by the limiting plate 406, the toggle column 402 gives back slightly to allow the positioning rod 605 to pass (the giving back does not reach the degree of gear change), after the positioning rod 605 is separated from the toggle column 402, the elastic force of the rotary spring 601 does not influence the toggle column 402 any more, and the limiting plate 406 presses the toggle plate 401 back to the matching position; thereby completing a shift cycle. When the gear is reversely shifted, the work process is the same, and the directions are opposite. In this process, the positioning plate 603 serves to prevent overstep. Meanwhile, in order to ensure the yielding and positioning effects, the end of the limiting plate 406 is provided with a rolling piece 410 so as to move and fit on the gear groove 409. The positioning plate is connected with the housing 100 through a torsion spring, and the torsion spring between the positioning plate and the housing 100 transmits the torque to the gear shifting plate 401 to be smaller than the rotary spring 601, so that the rotary spring 601 can smoothly drive the poking plate 602 to reset when resetting. In addition, the case 100 can limit the rotation angle of the striking plate 602 to prevent the problem of excessive stepping.

The rotation shaft 600 is further coupled to a driving shaft 700 as a structure for rotating the rotation shaft 600, the driving shaft 700 and the rotation shaft 600 are perpendicular to each other, the driving shaft 700 is rotatably coupled to the housing 100 through a bearing, one end is provided with a mounting spline 701, and the other end is drivingly coupled to the rotation shaft 600 through a bevel gear set, so that power can be set at a more proper position. A stop ring is fixed on the rotation shaft 600, and the rotation spring 601 is located between the toggle plate 602 and the stop ring. The retainer ring acts to restrain the return spring 601 and seal.

As shown in fig. 8 and 9, the rotating spring 601 is a torsion spring, the rotating spring 601 is sleeved on the rotating shaft 600, one end of the rotating spring 601 extends to the other end of the rotating shaft to the same plane, the toggling plate 602 and the positioning plate 603 are further driven to synchronously rotate by a toggling pin 607 parallel to the rotating shaft 600, the toggling pin 607 is located between two end portions of the rotating spring 601, and a stopper 102 fixedly disposed on the housing 100 is further disposed between two end portions of the rotating spring 601. The rotation spring 601 plays a role of bidirectional return, and can be realized by arranging a bidirectional elastic device on the rotation shaft 600, the toggle plate 602 or the positioning plate 603, such as the above-mentioned torsion spring arrangement mode or the matching mode of arranging one spring on each side. In the above solution, when the toggle pin 607 moves along with the toggle plate 602, one end of the torsion spring can be driven to move along with the toggle pin, and the other end of the torsion spring is limited by the stopper 102, and the two ends of the torsion spring are opened to form an elastic restoring force. The toggle pin 607 is provided with a groove matched with the end of the rotary spring 601, so that the axial position change of the end of the rotary spring 601 is prevented when the toggle pin 607 rotates along with the toggle plate 602.

The toggle plate 602 is axially slidably connected to the rotating shaft 600 along the rotating shaft 600, and may be a spline connection with a clearance fit or a sleeve with a direct clearance fit on the rotating shaft 600, and the rotating shaft 600 is further provided with a compression spring 606 for limiting the axial movement of the toggle plate 602. The toggle plate 602 is provided with a stop structure such as a fixed ring on one side of the rotary spring 601, and since the toggle plate 602 needs to rotate left and right and is locked by a certain resistance through a screw or the like, the problem of loose screw connection is easily caused. By means of the hold-down spring 606, a continuous hold-down force can be ensured without being influenced by the rotation. In addition, the hold-down spring 606 provides hold-down force to the toggle plate 602 to ensure its proper operation during normal operation. When the clamping device fails, an axial moving space is provided for the poking plate 602, and the poking plate 602 can move axially, so that the poking rod 604 is separated from the poking column 402, and the structure damage caused by forced poking is prevented. A collar is fixed to the rotation shaft 600 and a pressing spring 606 is provided between the collar and the dial plate 602.

The toggle plate 602 and the toggle column 402 are not located on the same plane, and the toggle rod 604 and the positioning rod 605 are both located on the same plane as the toggle column 402; the rotating shaft 600 is provided with a retractable spring for elastically pressing the striking plate 602 against the positioning plate 603. The whole poking plate 602 and the poking column 402 are not arranged on the same plane, so that the mutual limitation of the whole poking plate 602 on the gear shifting plate 401 in the rotating process is avoided, the shifting plate can be partially covered and overlapped, and further the radial occupied space is reduced. The ends of the two levers 604 can be connected together without affecting the lever post 402, ensuring the strength of the levers 604.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.