1. A multi-stage transmission axle gear box is characterized in that: the transmission device comprises a box body (1), an input shaft (2), an output shaft (3) and a multi-stage gear transmission assembly, wherein the input shaft (2) is transversely and rotatably assembled on the inner walls of two sides of one end of the box body (1) and provided with an input gear (21), the output shaft (3) is transversely and rotatably assembled on the inner walls of two sides of the other end of the box body (1) and provided with an output gear (31), and the multi-stage gear transmission assembly is assembled in the box body (1) and is respectively in transmission connection with the input gear (21) and the output gear (31).

2. The multi-speed drive axle gearbox of claim 1, wherein: the diameter of the input gear (21) is smaller than that of the output gear (31).

3. The multi-stage drive axle gearbox of claim 2, wherein said multi-stage gear drive assembly comprises:

a primary transmission wheel shaft (41), wherein the primary transmission wheel shaft (41) is transversely assembled in the box body (1) and is rotatably assembled with a first duplicate gear (5), the first duplicate gear (5) is provided with a first large gear (51) and a first small gear (52), and the first large gear (51) is meshed with the input gear (21);

a secondary transmission wheel shaft (42), wherein the secondary transmission wheel shaft (42) is transversely assembled in the box body (1) and is rotatably assembled with a second duplicate gear (6), the second duplicate gear (6) is provided with a second large gear (61) and a second small gear (62), and the second large gear (61) is meshed with the first small gear (52);

the three-stage transmission wheel shaft (43) is rotatably assembled on the inner walls of two sides of the box body (1), a third large gear (431) and a third small gear (432) are fixed on the three-stage transmission wheel shaft, the third large gear (431) is meshed with the second small gear (62), and the third small gear (432) is meshed with the output gear (31).

4. A multi-speed drive axle gearbox according to claim 3, wherein: still include fork assembly, but input gear (21) axial slip assemble in on input shaft (2), fork assembly assemble in box (1), and with input gear (21) are connected, be used for driving about input gear (21) are followed input shaft (2) axial slip extremely with first gear wheel (51) meshing or separation.

5. The multi-speed drive axle gearbox of claim 4, wherein: the shifting fork assembly comprises a shifting fork lead screw (71) and a shifting fork (72), the shifting fork lead screw (71) is transversely assembled on the side walls of two sides of the box body (1) in a rotatable manner, the shifting fork (72) is assembled on the shifting fork lead screw (71) through a base body screwed with the shifting fork lead screw (71), and a protruding part which is embedded and can relatively rotate with the shifting fork (72) is arranged on the periphery of one end of the input gear (21).

6. A multi-stage drive axle gearbox according to any of claims 3 to 5, wherein: the inner side of the first duplicate gear (5) is rotatably assembled on the primary transmission wheel shaft (41) through a bearing, and the inner side of the second duplicate gear (6) is rotatably assembled on the secondary transmission wheel shaft (42) through a bearing.

7. A multi-stage drive axle gearbox according to any one of claims 1 to 5, wherein: the top of the box body (1) is provided with an observation window with a cover plate.

8. A multi-stage drive axle gearbox according to any one of claims 1 to 5, wherein: one end of the input shaft (2) is used for connecting a power device, and the other end of the input shaft is provided with an electromagnetic brake (8) connected with the end of the input shaft.

9. The multi-speed drive axle gearbox of claim 8, wherein: and a heat radiation fan (9) is assembled at the other end part of the input shaft (2).

Background

The metro vehicle is applied for a certain period, all parts are abraded, deformed or damaged, and in order to enable the metro vehicle to stably and reliably run in a good state and prolong the service life, the metro vehicle needs to be inspected and overhauled according to the overhauling process requirement in a planned way. When the metro vehicle is repaired at the level above the overhaul level, the process bogie is required to replace the bogie in the metro vehicle for supporting and moving the vehicle body to a specified overhaul station for overhaul.

At present, the transmission ratio of a traditional bogie gearbox is generally less than 10, the transmission ratio is small, the deceleration degree is small, the driving force is small, and the space utilization rate is insufficient.

Disclosure of Invention

The invention aims to solve the technical problem of providing a multi-stage transmission axle gear box, which effectively overcomes the defects of the prior art.

The technical scheme for solving the technical problems is as follows:

a multi-stage transmission axle gear box comprises a box body, an input shaft, an output shaft and a multi-stage gear transmission assembly, wherein the input shaft is transversely and rotatably assembled on the inner walls of two sides of one end of the box body and provided with an input gear, the output shaft is transversely and rotatably assembled on the inner walls of two sides of the other end of the box body and provided with an output gear, and the multi-stage gear transmission assembly is assembled in the box body and is respectively in transmission connection with the input gear and the output gear.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the diameter of the input gear is smaller than that of the output gear.

Further, the above-mentioned multi-stage gear transmission assembly includes: a primary driving wheel shaft transversely installed in the housing and rotatably installed thereon with a first duplicate gear having a first large gear and a first small gear, the first large gear being engaged with the input gear; a secondary drive axle transversely mounted in said housing and rotatably mounted thereon a second duplicate gear having a second bull gear and a second pinion gear, said second bull gear being in meshing engagement with said first pinion gear; and the third-stage transmission wheel shaft is rotatably assembled on the inner walls of the two sides of the box body, and is fixedly provided with a third large gear and a third small gear, the third large gear is meshed with the second small gear, and the third small gear is meshed with the output gear.

The shifting fork assembly is assembled in the box body and connected with the input gear and is used for driving the input gear to axially slide along the input shaft to be meshed with or separated from the first gearwheel.

Further, the shifting fork assembly comprises a shifting fork lead screw and a shifting fork, the shifting fork lead screw is transversely assembled on the side walls of the two sides of the box body in a rotatable mode, the shifting fork is assembled on the shifting fork lead screw through a base body screwed with the shifting fork lead screw, and a protruding portion which is embedded with the shifting fork and can rotate relatively is arranged on the periphery of one end of the input gear.

Further, the inner side of the first dual gear is rotatably mounted to the primary pulley shaft through a bearing, and the inner side of the second dual gear is rotatably mounted to the secondary pulley shaft through a bearing.

Furthermore, the top of the box body is provided with an observation window with a cover plate.

Furthermore, one end of the input shaft is used for connecting a power device, and the other end of the input shaft is provided with an electromagnetic brake connected with the end of the input shaft.

Further, a heat radiation fan is mounted on the other end of the input shaft.

The invention has the beneficial effects that: the gearbox has a large transmission ratio, adopts multi-stage transmission, can utilize limited space under the same power, has large deceleration degree and large driving force, and can meet the traction requirement.

Drawings

FIG. 1 is a view of the internal drive configuration of the multi-speed drive axle gearbox of the present invention;

FIG. 2 is an assembly view of the structure at the input shaft of the multi-speed drive axle gearbox of the present invention;

FIG. 3 is a structural assembly view of a primary transfer axle in the multi-stage transfer axle gearbox of the present invention;

FIG. 4 is a structural assembly view of the secondary drive axle of the multi-stage drive axle gearbox of the present invention;

fig. 5 is a structural assembly view of the three stage transfer axle in the multi-stage transfer axle gear box of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a box body; 2. an input shaft; 3. an output shaft; 5. a first duplicate gear; 6. a second duplicate gear; 8. an electromagnetic brake; 9. a heat radiation fan; 21. an input gear; 31. an output gear; 41. a primary drive axle; 42. a secondary drive axle; 43. a tertiary drive axle; 51. a first bull gear; 52. a first pinion gear; 61. a second bull gear; 62. a second pinion gear; 71. a shifting fork lead screw; 72. a shifting fork; 431. a third bull gear; 432. a third pinion gear.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example (b): as shown in fig. 1, the multi-stage transmission axle gear box of the present embodiment includes a box body 1, an input shaft 2, an output shaft 3 and a multi-stage gear transmission assembly, wherein the input shaft 2 is transversely and rotatably assembled on two inner walls of one end of the box body 1, an input gear 21 is provided thereon, the output shaft 3 is transversely and rotatably assembled on two inner walls of the other end of the box body 1, an output gear 31 is provided thereon, and the multi-stage gear transmission assembly is assembled in the box body 1 and is respectively in transmission connection with the input gear 21 and the output gear 31.

The gear box of this embodiment is inside rationally distributed, and multistage transmission, drive ratio can reach 31.89, and drive ratio is big, and the degree of slowing down is big, and is higher to space utilization, and drive power is sufficient.

Preferably, the diameter of the input gear 21 is smaller than the diameter of the output gear 31.

In the scheme, the speed reduction ratio is relatively obvious, and the speed reduction degree is large.

Preferably, the multi-stage gear transmission assembly comprises: a primary transmission wheel shaft 41, said primary transmission wheel shaft 41 being transversely installed in said housing 1, and having a first duplicate gear 5 rotatably installed thereon, said first duplicate gear 5 having a first large gear 51 and a first small gear 52, said first large gear 51 being engaged with said input gear 21; a secondary transmission shaft 42, said secondary transmission shaft 42 being transversely installed in said housing 1 and rotatably installed with a second duplicate gear 6, said second duplicate gear 6 having a second large gear 61 and a second small gear 62, said second large gear 61 being engaged with said first small gear 52; a third-stage transmission wheel shaft 43, the third-stage transmission wheel shaft 43 being rotatably assembled on the inner walls of both sides of the case 1, and a third large gear 431 and a third small gear 432 being fixed thereto, the third large gear 431 being engaged with the second small gear 62, and the third small gear 432 being engaged with the output gear 31.

In the scheme, when the input shaft 2 rotates, the input gear 21 obtains the same rotating speed and then is transmitted to the first duplicate gear 5, and as the diameter of the first large gear 51 is larger than that of the first small gear 52 which is meshed with the first large gear, the first large gear is subjected to first-stage speed reduction at the first-stage transmission wheel shaft 41 and the first duplicate gear 5 and then is transmitted to the second duplicate gear 6; similarly, since the second gearwheel 61 has a larger diameter than the second pinion 62 engaged therewith, a secondary reduction is obtained at the secondary transfer axle 42 and at the second duplicate gear 6; similarly, the diameter of the third gearwheel 431 is larger than that of the third pinion 432 engaged with the second gearwheel 61, so that three-stage speed reduction is obtained at the position of the third-stage transmission wheel shaft 43 and then transmitted to the output gear 31 engaged with the third pinion 432, and the diameter of the output gear 31 is larger than that of the third pinion 432, so that four-stage speed reduction is obtained at the position of the output gear 31 and the output shaft 3, four-stage speed reduction transmission is completed in an effective space, the speed reduction degree is very large, the driving force is also large, and the requirement of steering transmission of the subway vehicle is met.

As a preferred embodiment, as shown in fig. 2, the transmission device further includes a fork assembly, the input gear 21 is axially slidably mounted on the input shaft 2, and the fork assembly is mounted in the housing 1 and connected to the input gear 21 for driving the input gear 21 to axially slide along the input shaft 2 to be engaged with or disengaged from the first large gear 51.

In the scheme, the shifting fork assembly is equivalent to a clutch, can control the transmission of the power of the input shaft 2 to the primary transmission wheel shaft 41, and is flexible to use.

Specifically, the shift fork assembly includes a shift fork lead screw 71 and a shift fork 72, the shift fork lead screw 71 is transversely rotatably assembled on the side walls of both sides of the box body 1, the shift fork 72 is assembled on the shift fork lead screw 71 through a seat body screwed with the shift fork lead screw 71, and a protrusion which is engaged with the shift fork 72 and can relatively rotate is provided on the periphery of one end of the input gear 21.

In the scheme, the shifting fork lead screw 71 is operated to rotate, so that the shifting fork base body can be driven to translate along the shifting fork lead screw 71, the shifting fork 72 is driven to push and pull the input gear 21 to axially move to be meshed with or separated from the first gearwheel 51 corresponding to the input shaft 2, the transmission and the stop of power are realized, and the structural design is reasonable.

It should be noted that: the two ends of the shifting fork screw rod 71 are respectively sleeved with shaft sleeves, the shaft sleeves are assembled with bearings in shaft holes at the two ends of the box body 1, and the joint is sealed by adopting a conventional shaft end.

As shown in FIG. 3, the primary driving wheel shaft 41 is assembled by a fixed shaft, and is connected and sealed with the two sides of the box body 1 by a conventional shaft end assembly, and the primary driving wheel shaft cannot rotate.

A plurality of bearings are axially assembled on the inner side of the first duplicate gear 5, a limiting step limited by the bearing at the edge is arranged on the inner side of an assembling hole at one end of the first duplicate gear 5, and bearing sealing assembly components such as a conventional bearing end cover, a positioning check ring and the like are arranged at the other end of the assembling hole.

As shown in FIG. 4, the secondary transmission wheel shaft 42 is assembled by a fixed shaft, and the two ends of the secondary transmission wheel shaft are assembled and connected with the two side ratios of the box body 1 by a conventional shaft end assembly and sealing, so that the secondary transmission wheel shaft cannot rotate.

The inner side of the second duplicate gear 6 is axially provided with a plurality of bearings, a limiting step limited by the bearing at the edge is arranged along the inner side of an assembly hole at one end of the second duplicate gear 6, and the other end of the assembly hole is provided with conventional bearing end covers, positioning check rings and other bearing sealing assembly components.

As shown in fig. 5, the two ends of the third-stage transmission wheel shaft 43 are connected with the assembly holes adapted to the two sides of the case 1 through bearing assembly, so that the third-stage transmission wheel shaft 43 rotates, the shaft end cover is installed on the outer side of the assembly hole, and the joint of the assembly hole and the bearing is sealed by a conventional bearing sealing structure.

In this embodiment, the two ends of the output shaft 3 are also assembled and connected with the assembly holes matched with the two sides of the box body 1 through bearings, the shaft end covers are arranged outside the assembly holes to shield the assembly holes, and the joints of the bearings and the assembly holes are sealed by conventional bearing sealing parts.

Preferably, the top of the box body 1 is provided with an observation window with a cover plate.

This scheme is through setting up the convenient inside part structure of gear box of observing of observation window, and the daily maintenance investigation of being convenient for.

Preferably, one end of the input shaft 2 is connected to a power unit, and the other end is provided with an electromagnetic brake 8 connected to the end.

Specifically, one end of the input shaft 2 is connected with a permanent magnet brushless motor as power, the other end is braked by an electromagnetic brake 8,

preferably, a heat radiation fan 9 is attached to the other end of the input shaft 2.

In the scheme, the input shaft 2 drives the cooling fan 9 to rotate at a high speed in the process of being driven by the power device to rotate, so that a good cooling effect is achieved.

In this embodiment, one end of the box body 1 is further provided with a suspension lug.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.