1. The utility model provides a door closer automation assembly line, includes conveyer belt (6) that are used for carrying casing (1), its characterized in that has set gradually along the direction of delivery of conveyer belt (6):

the three-axis cap screwing machine (10) is used for screwing the left end cover, the lower end cover (121) and the oil adjusting needle (14) on the shell (11) respectively;

the assembling device (2) is used for installing the spring (17), the filter screen (18), the piston (19), the gasket and the gear shaft (16) on the shell (11), and meanwhile, the upper end cover (122) and the right end cover (13) are pre-screwed on the shell (11);

the two-axis cap screwing machine (3) is used for screwing the upper end cover and the right end cover (13) on the shell (11);

the oiling machine (4) is used for adding hydraulic oil into the shell (11) and detecting oil leakage;

and the testing machine (5) is used for carrying out torsion test on the assembled door closer (1).

2. The door closer automation assembly line of claim 1, wherein: the assembling device (2) comprises a transfer mechanism (7) arranged on the conveying belt (6), a top assembling mechanism (8) arranged right above the transfer mechanism (7), and a side assembling mechanism (9) arranged on the side part of the upper end of the transfer mechanism (7), wherein the transfer mechanism (7) comprises a rotating shaft (73), rotating rods (72) symmetrically arranged at two ends of the rotating shaft (73) in a radial manner, and a supporting plate (73) rotatably arranged between the two opposite rotating rods (72), a rotating motor (74) in transmission connection with the supporting plate (73) is arranged on the rotating rod (72), a group of telescopic cylinders (75) are oppositely arranged on the supporting plate (73), and a gripper (76) used for gripping the shell (11) is arranged at the output end of each telescopic cylinder (75); a concave area (61) is formed on the conveying belt (6) at the position of the transfer mechanism (7), and the transfer mechanism (7) is trapped in the concave area (61); the top assembling mechanism (8) comprises an upper material tray (81) and a lower material tray (82) which are arranged up and down and rotate intermittently, a lower gasket channel (801), a gear shaft channel (802), an upper gasket channel (803) and an upper end cover channel (804) are radially arranged on the upper material tray (81) and the lower material tray (82) respectively, a valve is arranged at the bottom of each channel, corresponding feeding bins are sequentially arranged above each channel of the upper material tray (81), and a pushing piece (84) used for pushing materials is arranged on the lower material tray (82); the side assembling mechanism (9) comprises a rotary drum (91), a sealing drum (92) sleeved on the outer wall of the rotary drum (91) in a sliding manner, spring holes (911), filter screen holes (912), a piston hole (913), a pushing piston hole (914) and a right end cover hole (915) are sequentially arranged on the end face of the rotary drum (91) in an annular manner, a spring groove (901) communicated with the spring holes (911), a filter screen groove (902) communicated with the filter screen holes (912), a piston groove (903) communicated with the piston hole (913) and a right end cover groove (904) communicated with the right end cover hole (915) are sequentially arranged on the outer side wall of the rotary drum (91) in an annular manner, an upper storage bin for adding corresponding materials into each groove is arranged outside the rotary drum (91), a sliding cylinder (94) is arranged at the rear end of the rotary drum (91), the output end of the sliding cylinder (94) is connected with the sealing drum (92), a fixed disc (95) arranged on the rear end of the rotary drum (91) in an axial center manner, the fixed disc (95) is provided with a spring push rod (961) inserted into the spring hole (911), a filter screen push rod (962) inserted into the filter screen hole (912), a piston push rod (963) inserted into the piston hole (913), a right end cover push rod inserted into the piston push hole (913) and a right end cover push rod inserted into the right end cover hole (915), and the end part of the right end cover push rod is provided with an elastic rotating head.

3. The door closer automation assembly line of claim 2, wherein: the pushing piece (84) is a pushing air nozzle, and the pushing air nozzle is connected with the air pump after being connected with the regulating valve.

4. The door closer automation assembly line of claim 2, wherein: propelling movement spare (84) are a propelling movement pole (841), the tip of propelling movement pole (841) slides and is provided with slip pushing head (842), be provided with propelling spring (844) between slip pushing head (842) and propelling movement pole (841), the tip cover of propelling movement pole (841) is equipped with one and has elastic head (843) of twisting in advance, the centre bore has been seted up at the center of twisting head (843) in advance, when propelling spring (844) was compressed, slip pushing head (842) hide in the centre bore of twisting head (843) in advance, propelling movement pole (841) and one are twisted the motor connection in advance, twist the body and a propelling movement jar of motor in advance and connect.

5. The door closer automation assembly line of claim 2, wherein: the outer wall of the rotary drum (91) is axially provided with guide strips, and the inner wall of the sleeve (92) is provided with guide grooves matched with the guide strips.

6. The door closer automation assembly line of claim 5, wherein: the number of the sliding cylinders (94) is at least two, and the sliding cylinders (94) are uniformly distributed on the rear end side wall of the rotating drum (91).

Background

The door closer is a hydraulic press similar to a spring on the door head, can be released after being compressed after the door is opened, automatically closes the door, has the effect like a spring door, and can ensure that the door is accurately and timely closed to an initial position after being opened. The door closer has the significance of not only automatically closing the door, but also protecting the door frame and the door body (smooth closing), and more importantly, the door closer becomes a non-negligible execution part of modern building intelligent management. Door closers are used primarily in commercial and public buildings, but there are also situations in which they are used at home. They have many uses, the most important of which is to have doors that close themselves to limit the spread of fire and ventilation within the building.

The method comprises the steps of manually installing or assembling parts by using a door closer assembling machine in the actual production and assembly process, wherein both the two modes need manual participation, parts are assembled by tools such as a pneumatic motor through manual parts taking, firstly, after a shell is positioned and clamped manually, an end cover, a piston, a filter screen, a spring, a gear shaft and a gasket are placed beside an assembling station, the parts to be installed are taken out of a material basket manually, the parts are screwed on a hole position in advance and then screwed by using a pneumatic tool, after the parts are assembled, the parts are taken out again to be assembled, the parts need to be taken out repeatedly, when the parts are placed in the material basket, the parts are randomly placed, the production efficiency of products in the placing sequence is low when manual installation is needed, safety accidents easily occur during manual and mechanical interactive production operation, and potential safety hazards exist. An integrated automatic control mode is needed to realize automatic production.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an automatic assembling line for a door closer aiming at the current situation of the prior art, so that the automation degree of the door closer assembling is improved, the manual participation degree is reduced, and the assembling efficiency is improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an automatic assembly line of door closer, includes the conveyer belt that is used for carrying the casing, its characterized in that has set gradually along the direction of delivery of conveyer belt:

the three-shaft cap screwing machine is used for screwing the left end cover, the lower end cover and the oil adjusting needle on the shell respectively;

the assembling device is used for installing the spring, the filter screen, the piston, the gasket and the gear shaft on the shell, and pre-screwing the upper end cover and the right end cover on the shell;

the two-shaft cap screwing machine is used for screwing the upper end cover and the right end cover on the shell;

the oiling machine is used for adding hydraulic oil into the shell and detecting oil leakage;

and the testing machine is used for testing the torsion of the assembled door closer.

As an improvement, the assembling device comprises a transfer mechanism arranged on the conveying belt, a top assembling mechanism arranged right above the transfer mechanism, and a side assembling mechanism arranged on the side part of the upper end of the transfer mechanism, wherein the transfer mechanism comprises a rotating shaft, rotating rods symmetrically arranged at two ends of the rotating shaft in a radial manner, and a supporting plate rotatably arranged between two opposite rotating rods, a rotating motor in transmission connection with the supporting plate is arranged on the rotating rods, a group of telescopic cylinders are oppositely arranged on the supporting plate, and the output end of each telescopic cylinder is provided with a gripper used for gripping the shell; a concave area is formed on the conveying belt at the arrangement position of the transfer mechanism, and the transfer mechanism is trapped in the concave area; the top assembling mechanism comprises an upper material tray and a lower material tray which are arranged up and down and rotate intermittently, a lower gasket channel, a gear shaft channel, an upper gasket channel and an upper end cover channel are respectively and radially arranged on the upper material tray and the lower material tray, a valve is arranged at the bottom of each channel, a corresponding feeding bin is sequentially arranged above each channel of the upper material tray, and a pushing member for pushing materials is arranged on the lower material tray; the side assembling mechanism comprises a rotary drum and a sealing drum sleeved on the outer wall of the rotary drum in a sliding manner, wherein spring holes, filter mesh holes, a piston hole, a piston pushing hole and a right end cover hole are sequentially and annularly arranged on the end surface of the rotary drum, spring grooves communicated with the spring holes, filter mesh grooves communicated with the filter mesh holes, piston grooves communicated with the piston holes and right end cover grooves communicated with the right end cover hole are sequentially and annularly arranged on the outer side wall of the rotary drum, an upper bin for adding corresponding materials into the grooves is arranged outside the rotary drum, a sliding cylinder is arranged at the rear end of the rotary drum, the output end of the sliding cylinder is connected with the sealing drum, a fixed disc arranged at the axle center of the rotary drum is fixedly connected with the rear end of the rotary drum, a spring push rod inserted into the spring holes, a filter mesh inner filter screen push rod inserted into the piston holes, a piston push rod inserted into the piston pushing hole and a right end cover push rod inserted into the right end cover hole are arranged on the fixed disc, the end part of the push rod of the right end cover is provided with an elastic rotating head.

And the pushing part is a pushing air nozzle, and the pushing air nozzle is connected with the air pump after being connected with the regulating valve.

The improved structure is characterized in that the pushing part is a pushing rod, a sliding pushing head is arranged at the end part of the pushing rod in a sliding mode, a pushing spring is arranged between the sliding pushing head and the pushing rod, an elastic pre-screwing head is sleeved at the end part of the pushing rod, a center hole is formed in the center of the pre-screwing head, when the pushing spring is compressed, the sliding pushing head is hidden in the center hole of the pre-screwing head, the pushing rod is connected with a pre-screwing motor, and a body of the pre-screwing motor is connected with a pushing cylinder.

And in the improvement, a guide strip is axially formed on the outer wall of the rotary drum, and a guide groove matched with the guide strip is formed on the inner wall of the sleeve.

In a further improvement, the number of the sliding cylinders is at least two, and the sliding cylinders are uniformly distributed on the side wall of the rear end of the rotary drum.

Compared with the prior art, the invention has the advantages that: the semi-automatic assembling and oiling testing device for the door closer utilizes the cover screwing machine, the oiling machine, the testing machine and the assembling device to realize semi-automatic assembling and oiling testing of the door closer, reduces the degree of manual participation, and improves the production efficiency and the qualification rate of products. Specifically, the first station is that the shell of the door closer is taken from the conveying belt, the left end cover, the lower end cover and the oil adjusting needle are respectively screwed on the shell by using a three-shaft cap screwing machine to provide guarantee for assembling internal components of the shell, and then the shell is put back onto the conveying belt; the second station is that on the basis of the first station, the spring, the filter screen and the piston are sequentially arranged in a hole of a right end cover of the shell by using an assembling device, meanwhile, the gasket and the gear shaft are sequentially arranged in the shell in a hole of an upper end cover of the shell, the piston is synchronously pushed in the process of arranging the gear shaft, so that the piston and the gear shaft are meshed together, and the upper end cover and the right end cover are pre-screwed on the shell after the internal components are arranged; the third station is that on the basis of the second station, the upper end cover and the right end cover are screwed on the shell by using a cap screwing machine, and the end cover on the shell must be completely screwed because the shell is internally provided with hydraulic oil, so that the oil leakage phenomenon is avoided; the fourth station is based on the third station, adds hydraulic oil in the shell by using the oiling machine and simultaneously detects oil leakage; and the last station is that a testing machine is used for testing the torsion of the assembled door closer, and unqualified products are removed.

Drawings

FIG. 1 is a schematic overall layout of a door closer automation assembly line in an embodiment of the invention;

fig. 2 is a schematic structural view of an outer shape of a door closer according to an embodiment of the present invention;

fig. 3 is an exploded view of a door closer according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an assembly apparatus according to an embodiment of the present invention;

FIG. 5 is a top view structural diagram of the upper tray in the embodiment of the invention;

FIG. 6 is a schematic structural view of a push rod in an embodiment of the present invention;

FIG. 7 is a schematic view of the transfer mechanism of an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of the drum in the embodiment of the present invention;

FIG. 9 is a schematic side view of a drum according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 9, the door closer automatic assembly line in the present embodiment includes a conveyor belt 6, a capping machine, an assembly apparatus 2, an oiling machine 4, and a testing machine 5. Wherein, the spiral cover machine is used to triaxial spiral cover machine 10 and diaxon spiral cover machine 3, and triaxial spiral cover machine 10 can carry out the spiral cover in three directions, and diaxon spiral cover machine 3 can carry out the spiral cover in two directions.

First, a door closer 1 to be assembled according to the present invention will be briefly described. As shown in fig. 2 and 3, the door closer 1 includes a housing 11, a left end cap, a lower end cap 121, an oil needle 14, an upper end cap 12, a right end cap 13, a spring 17, a strainer 18, a piston 19, an upper gasket 152, a lower gasket 151, and a pinion 16, the spring 17, the strainer 18, and the piston 19 are installed between the left and right end caps 13 in the lateral direction, the upper gasket 152, the lower gasket 151, and the pinion 16 are installed between the upper and lower end caps 122 and 121 in the longitudinal direction, and the piston 19 and the pinion 16 are engaged with each other inside the housing 11.

Next, the automatic assembly line of the door closer 1 of the present invention will be described. As shown in fig. 1, a three-axis capping machine 10, an assembling apparatus 2, a two-axis capping machine 3, an oiling machine 4, and a testing machine 5 are sequentially arranged along the conveying direction of a conveyor 6. The conveying belt 6 is used for conveying the shell 11 between different stations, and the three-shaft cap screwing machine 10 is used for screwing the left end cover, the lower end cover 121 and the oil adjusting needle 14 on the shell 11 respectively; the assembly device 2 is used for installing the spring 7, the filter screen 18, the piston 19, the gasket (comprising the upper gasket 152 and the lower gasket 151) and the gear shaft 16 on the shell 11, and meanwhile, pre-screwing the upper end cover 122 and the right end cover 13 on the shell 11; a two-axis capping machine 3 for screwing the upper end cap 122 and the right end cap 13 onto the housing 11; the oiling machine 4 is used for adding hydraulic oil into the shell 11 and detecting oil leakage; and the testing machine 5 is used for testing the torsion of the assembled door closer 1. The three-axis capping machine 10, two-axis capping machine 3, fuel dispenser 4 and testing machine 5 are all commercially available machines and are not described redundantly again. The assembling device according to the present invention for integrally assembling the internal components of the housing 11 will be further described.

As shown in fig. 4 to 9, the assembling device 2 includes a transfer mechanism 7 provided on the conveyor 6, a top assembling mechanism 8 provided directly above the transfer mechanism 7, and a side assembling mechanism 9 provided on the upper end side of the transfer mechanism 7. The transfer mechanism 7 is used for transferring the shell 11; the top assembling mechanism 8 is used for assembling the gasket (including the upper gasket 152 and the lower gasket 151) and the gear shaft 16 and pre-screwing the upper end cover 122; the side assembly mechanism 9 is used for assembling the spring 17, the filter net 18 and the piston 19 and pre-screwing the right end cover 13.

Referring to fig. 4 and 7, the transfer mechanism 7 includes a rotating shaft 71, rotating rods 72 symmetrically disposed at two ends of the rotating shaft 71 and radially disposed, and a supporting plate 73 rotatably disposed between the two rotating rods 72, wherein a rotating motor 74 in transmission connection with the supporting plate 73 is disposed on the rotating rod 72, a set of telescopic cylinders 75 are disposed on the supporting plate 73, and a gripper 76 for gripping the housing 11 is disposed at an output end of each telescopic cylinder 75. The conveyer belt 6 is provided with a concave area 61 at the position where the transfer mechanism 7 is arranged, meanwhile, the transfer mechanism 7 is trapped in the concave area 61, the concave area 61 of the conveyer belt 6 has the ingenious effect of facilitating the arrangement of the transfer mechanism 7, the transfer mechanism 7 conveys one end of the concave area 61 of the shell 11 to the other end, when the rotating rod 72 rotates to the horizontal position, the gripper 76 can just aim at the shell 11, meanwhile, the transfer mechanism 7 has the other effect of grabbing the shell 11 from the conveyer belt 6 and then transferring the shell to an assembly station, so that the assembly and the loading and unloading can be synchronously carried out. If the concave area 61 is not arranged, the transfer mechanism 7 is directly arranged above the conveying belt 6, so that lateral grabbing by the grabs on the rotating rods 72 is not facilitated, when the shell 11 is moved to the position right below the rotating shaft 71, the grabs by the grabs 76 on the rotating rods 72 are used, although grabbing of the shell 11 is facilitated, only one grabs on one rotating rod 72 is arranged at the position closest to the conveying belt, so that grabbing and releasing of the shell 11 cannot be performed synchronously, and the working efficiency is reduced; and two rotating rods 72 are respectively placed on two sides of the conveying belt 6, so that the arrangement of the supporting plates 73 is reduced, the supporting effect of the supporting plates 73 on the shell 11 is reduced, and the shell 11 is easy to shake.

In the process of taking and placing the shell 11, the rotating motor 74 can drive the supporting plate 73 to rotate, the fine adjustment of the grabbing and placing angles of the shell 11 by the grabbing claws 76 is realized, when the shell 11 is grabbed, the telescopic cylinders 75 drive the grabbing claws 76 to extend out, when the grabbing claws 76 grab the shell 11 on the conveying belt 6, then the telescopic cylinders 75 retract, the shell 11 is brought above the supporting plate 73, and the rotating rod 72 rotates to bring the shell 11 to an assembling station; when lowering the housing 11, the turning bar 72 transfers the housing to the other end of the recessed area 61, the telescopic cylinder 75 is extended again, the gripper 76 is released and the housing 11 is placed on the conveyor belt 6.

With reference to fig. 4 to 6, the top assembling mechanism 8 includes an upper tray 81 and a lower tray 82 which are arranged up and down and rotate intermittently, a lower pad channel, a gear shaft channel, an upper pad channel and an upper end cover channel are respectively and radially provided on the upper tray 81 and the lower tray 82, a valve is provided at the bottom of each channel, a corresponding feeding bin is sequentially provided above each channel of the upper tray 81, and a pushing member 84 for pushing the material is provided on the lower tray 82. Specifically, a first lower gasket channel 801, a first gear shaft channel 802, a first upper gasket channel 803 and a first upper end cover channel 804 are radially arranged on the upper tray 81, and a second lower gasket channel, a second gear shaft channel, a second upper gasket channel and a second upper end cover channel are radially arranged on the lower tray 82; a first valve 811 is arranged at the outlet of the first lower gasket channel 801 on the lower side surface of the upper tray 81, a second valve is arranged at the outlet of the first pinion shaft channel 802 on the lower side surface of the upper tray 81, a third valve is arranged at the outlet of the first upper gasket channel 803 on the lower side surface of the upper tray 81, a fourth valve is arranged at the outlet of the first upper end cover channel 804 on the lower side surface of the upper tray 81, a fifth valve 821 is arranged at the outlet of the second lower gasket channel on the lower side surface of the lower tray 82, a sixth valve is arranged at the outlet of the second lower gasket channel on the lower side surface of the lower tray 82, a seventh valve is arranged at the outlet of the second lower gasket channel on the lower side surface of the lower tray 82, and an eighth valve is arranged at the outlet of the second lower gasket channel on the lower side surface of the lower tray 82; a lower gasket feeding bin 83 is arranged above the first lower gasket channel 801 of the upper tray 81, a gear shaft feeding bin is arranged above the first gear shaft channel 802 of the upper tray 81, an upper gasket feeding bin is arranged above the first upper gasket channel 803 of the upper tray 81, and an upper end cover feeding bin is arranged above the first upper end cover channel 804 of the upper tray 81.

With the synchronous intermittent rotation of the feeding disc 81 and the discharging disc 82, the first lower gasket channel 801, the first gear shaft channel 802, the first upper gasket channel 803 and the first upper end cover channel 804 respectively correspond to the second lower gasket channel, the second gear shaft channel, the second upper gasket channel and the second upper end cover channel one to one, and in the state of stopping rotation, the first lower gasket channel 801 is communicated with the second lower gasket channel, or the first gear shaft channel 802 is communicated with the second gear shaft channel, or the first upper gasket channel 803 is communicated with the second upper gasket channel, or the first upper end cover channel 804 is communicated with the second upper end cover channel. In this way, when each channel on the upper tray 81 runs to the position right below the corresponding feeding bin, the corresponding feeding bin feeds the corresponding material into the channel below, so as to realize the feeding of the upper tray 81; and when the channels of the upper tray 81 run to be communicated with the channels of the lower tray 82, the materials on the upper tray 81 fall onto the lower tray 82, and when the materials in the channels of the lower tray 82 run to the pushing member 84, the pushing member 84 sends the materials into the shell 11.

Preferably, the pushing member 84 is a pushing nozzle, and the pushing nozzle is connected to the air pump after being connected to the regulating valve. Alternatively, as shown in fig. 6, the pushing member 84 is a pushing rod 841, the end of the pushing rod 841 is slidably provided with a sliding pushing head 842, a pushing spring 844 is arranged between the sliding pushing head 842 and the pushing rod 841, an elastic pre-screwing head 843 is sleeved on the end of the pushing rod 841, a center hole is formed in the center of the pre-screwing head 843, when the pushing spring 844 is compressed, the sliding pushing head 842 is hidden in the center hole of the pre-screwing head 843, the pushing rod 841 is connected with a pre-screwing motor, and a body of the pre-screwing motor is connected with a pushing cylinder. When the upper pad 152 and the lower pad 151 are pushed, the sliding pushing head 842 does not need large pushing force, the pushing spring 844 is not compressed to a large extent, and the sliding pushing head 842 is exposed outside the pre-screwing head 843; when the upper end cover 122 and the gear shaft 16 are pushed and a large pushing force is needed, the pushing spring 844 is compressed, the sliding pushing head 842 is hidden in a central hole of the pre-screwing head 843, when the upper end cover 122 needs to be pre-screwed, the elastic pre-screwing head 843 is tightly pressed on the outer end part of the upper end cover 122, and the pre-screwing motor drives the pre-screwing head 843 to rotate, so that the upper end cover 122 is pre-screwed.

Referring to fig. 4, 8 and 9, the side assembling mechanism 9 includes a rotary drum 91, a sealing cylinder 92 slidably fitted over an outer wall of the rotary drum 91, a spring hole 911, a strainer hole 912, a piston hole 913, a pushing piston hole 914 and a right end cap hole 915 are sequentially formed in an end surface of the rotary drum 91 in an annular direction, a spring groove 901 communicating with the spring hole 911, a strainer groove 902 communicating with the strainer hole 912, a piston groove 903 communicating with the piston hole 913, and a right end cap groove 904 communicating with the right end cap hole 915 are sequentially formed in an outer side wall of the rotary drum 91 in an annular direction, an upper bin for adding a corresponding material into each groove is provided outside the rotary drum 91, specifically, a spring upper bin 931, a strainer upper bin 932, a piston upper bin 933, and a right end cap bin 934 are sequentially formed in an outer annular direction of the rotary drum 91, a sliding cylinder 94 is provided at a rear end of the rotary drum 91, an output end of the sliding cylinder 94 is connected to the sealing cylinder 92, the rear end of the rotary drum 91 is fixedly connected with a fixed disc 95 arranged with the axis of the rotary drum 91, the fixed disc 95 is provided with a spring push rod 961 inserted into a spring hole 911, a filter screen push rod 962 inserted into a filter screen hole 912, a piston push rod 963 inserted into a piston hole 913, a push rod inserted into a push piston hole 914 and a right end cover push rod inserted into a right end cover hole 915, the spring push rod 961, the filter screen push rod 962, the piston push rod 963, the push rod and the right end cover push rod are respectively connected with a corresponding push cylinder 97, the end part of the right end cover push rod is provided with an elastic rotating head, the elastic rotating head is connected with a rotating motor, when the right end cover 13 needs to be pre-screwed, the elastic rotating head is pressed on the right end cover 13, and the rotating motor drives the elastic rotating head to rotate, so that the right end cover 13 is pre-screwed.

When the spring feeding bin 931, the filter screen feeding bin 932, the piston feeding bin 933, and the right end cover feeding bin 934 are in one-to-one correspondence with the spring groove 901, the filter screen groove 902, the piston groove 903, and the right end cover groove 904, respectively, the sliding cylinder 94 drives the sealing cylinder 92 to retreat, the respective feeding bins add material to the corresponding grooves of the rotary cylinder, and then the sealing cylinder 92 slides forward, the sealing cylinder 92 seals the respective grooves of the rotary cylinder 91, and then the rotary cylinder 91 rotates intermittently, and when the spring hole 911, the filter screen hole 912, the piston hole 913, the push piston hole 914, and the right end cover hole 915 on the rotary cylinder 91 correspond to the right end cover hole of the housing 11 fixed to the rotary rod 72 in sequence, the spring push rod 961 pushes the spring 17 in the spring hole 901, the filter screen push rod 962 pushes the filter screen 18 in the filter screen 902, the piston push rod 963 pushes the piston in the piston hole 913 into the housing 11, and then, after the rotary cylinder 91 rotates an intermittent angle, the piston rod is pushed to push the piston 19, so that the piston 19 and the gear shaft 16 are meshed with each other, then the right end cover push rod pushes the right end cover 13 to the right end cover hole of the shell 11, the elastic rotating head on the right end cover push rod rotates, and meanwhile the right end cover 13 is pre-screwed.

Preferably, the number of the sliding cylinders 94 is at least two, and the sliding cylinders 94 are evenly distributed over the rear end side wall of the rotary drum 91. Meanwhile, in order to improve the sliding guiding effect of the sleeve 92 and avoid the sleeve 92 from rotating, a guide strip is axially formed on the outer wall of the rotating cylinder 91, and a guide groove matched with the guide strip is formed on the inner wall of the sleeve 92.

In conclusion, the semi-automatic assembling and oiling testing of the door closer 1 are realized by utilizing the cover screwing machine, the oiling machine 4, the testing machine 5 and the assembling device 2, so that the manual participation degree is reduced, and the production efficiency and the product yield are improved. Specifically, the first station is that the shell 11 of the door closer 1 is taken from the conveying belt 6, the left end cover, the lower end cover 121 and the oil adjusting needle 14 are respectively screwed on the shell 11 by using the three-shaft cap screwing machine 10, so as to provide guarantee for assembling internal components of the shell 11, and then the shell 11 is put back on the conveying belt 6; the second station is that on the basis of the first station, the spring 17, the filter screen 18 and the piston 19 are sequentially arranged in a hole of a right end cover of the shell 11 by using the assembling device 2, meanwhile, the gasket and the gear shaft 16 are sequentially arranged in the shell 11 in a hole of an upper end cover of the shell 11, the piston 19 is synchronously pushed in the process of arranging the gear shaft 16, so that the piston 19 and the gear shaft 16 are meshed with each other, and after the internal components are arranged, the upper end cover 122 and the right end cover 13 are pre-screwed on the shell 11; the third station is that on the basis of the second station, the upper end cover 122 and the right end cover 13 are screwed on the shell 11 by using a cap screwing machine, and because the shell 11 is filled with hydraulic oil, the end covers on the shell 11 must be completely screwed, so that the oil leakage phenomenon is avoided; the fourth station is that on the basis of the third station, the oiling machine 4 is used for adding hydraulic oil into the shell 11 and simultaneously performing oil leakage detection; the last station is that a testing machine 5 is used for testing the torsion of the assembled door closer 1, and unqualified products are removed.