A speed reducer assembly line

Abstract

The present invention provides a reducer assembly line, which includes, arranged in sequence, a shaft system assembly station, a locating pin installation station, a splicing gap adjustment station, a glue application station, a box closing and bolt installation station, a box closing bolt tightening station, a peripheral component assembly station, an airtightness detection station, a rotation test station, an experimental oil draining station, an oil filling and plugging station, and a packaging and shipping station. The process station layout of the reducer assembly line of the present invention is reasonable, especially the design of some devices in the process stations is reasonable, significantly improving the assembly quality of the reducer and enhancing the assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of reducer assembly, and particularly to a reducer assembly line. Background Art

[0002] New energy vehicles are the future development direction. Considering the development potential of this industry in the future and customer needs, research and development are invested in the components of new energy vehicles. In particular, the assembly research and development of pure electric and hybrid reducers, which are one of the core components, is particularly important for reducer manufacturers, who are faced with the need for research and development, as well as improving production capacity and quality. The assembly process of automotive reducers is a technological process of sequentially assembling the components of the reducer on an assembly line. Due to the cumbersome process, the assembly line is extremely crucial in the entire production process, thus posing higher requirements for the assembly process of reducers. At present, the domestic assembly production of new energy vehicle reducers is still in its initial stage, and there are many problems in its assembly process, such as unreasonable layout of process stations, low quality of process operation stations, especially the relevant devices in the process stations are not set up reasonably enough. Summary of the Invention

[0003] In view of this, the present invention aims to provide a reducer assembly line with a reasonable layout of process stations. In particular, the relevant devices in the process stations are reasonably designed and delicate, significantly improving the assembly quality of the reducer and enhancing the assembly efficiency.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is to provide a reducer assembly line: including a shaft system assembly station, a positioning pin installation station, a splicing and gap adjustment station, a gluing station, a box closing and bolt installation station, a box closing bolt tightening station, a peripheral component assembly station, an airtightness detection station, a rotation test station, an experimental oil draining station, an oil filling and plugging station, and a packaging and shipping station arranged in sequence. The shaft system assembly station includes assembly tools, the positioning pin installation station includes a positioning pin installation device, the splicing and gap adjustment station includes a splicing and gap adjustment device, the gluing station includes gluing tools, the box closing and bolt installation station, the box closing bolt tightening station, and the peripheral component assembly station all include wrenches, the airtightness detection station includes an airtightness leak detector, the rotation test station includes a reducer rotation test device, the experimental oil draining station includes a suction pump, the oil filling and plugging station includes an oil plug, and the packaging and shipping station includes a packaging mechanism;

[0005] The positioning pin installation device includes a guide rod and a weight type impact hammer. The weight type impact hammer is slidably sleeved outside the guide rod. The end of the guide rod is connected with a plug, and the plug includes a force application part and a positioning pin insertion part connected to each other. The weight type impact hammer is located above the force application part, and the weight type impact hammer can be in contact with the force application part in the vertical direction during the downward movement;

[0006] The reducer rotation test device includes a stopping mechanism, which includes a pressing rod, a connecting rod, a guiding rod, and a retaining pin connected in sequence. The retaining pin and the pressing rod are respectively located inside and outside the assembly line bracket. The connecting rod abuts against the lower part of the assembly line bracket, and a return spring is sleeved outside the guiding rod.

[0007] Further, both the force application part and the positioning pin insertion part are cylindrical structures. The diameter of the force application part is greater than that of the positioning pin insertion part, and the force application part and the positioning pin insertion part are connected by an inclined stepped surface.

[0008] Further, the splicing gap adjustment device includes a gap adjustment gasket and a gap adjustment gasket sleeve for containing the gap adjustment gasket. An opening is provided on the side wall of the gap adjustment gasket sleeve, and the gap adjustment gaskets are stacked inside the gap adjustment gasket sleeve.

[0009] Further, the stopping mechanism further includes a pressing rod base and a retaining pin base. The upper end surface of the retaining pin base is lower than the assembly line bracket. The retaining pin is located in the retaining pin base and protrudes above the assembly line bracket. The pressing rod is located in the pressing rod base.

[0010] Further, the reducer rotation test device further includes a reducer fixing plate. A plurality of pin holes are circumferentially and evenly distributed on the reducer fixing plate. The pin holes are in the shape of oblong holes, and a transmission shaft insertion hole is provided at the center of the reducer fixing plate.

[0011] Further, it further includes an oil seal disassembly device for removing the oil seal. The oil seal disassembly device includes a pull ring support seat, and the pull ring support seat is connected with a retaining cover by a long screw; a guiding groove is provided on the pull ring support seat, and an oil seal pull ring is movably connected in the guiding groove; a connecting plate is provided on the upper part of the oil seal pull ring, and the connecting plate is located above the pull ring support seat; a hook is provided on the lower part of the oil seal pull ring; a pull rod is threadedly connected through the connecting plate; the pull rod passes through the pull ring support seat; a spring support frame is fixedly connected to the top of the pull ring support seat; the spring support frame is formed by connecting a horizontal end plate and a vertical end plate; the pull rod passes through the horizontal end plate; a connecting block is fixedly connected to the upper end of the pull rod, and the connecting block is located above the horizontal end plate.

[0012] Further, a first smooth hole is provided on the pull ring support seat, the pull rod passes through the first smooth hole, a second smooth hole is provided on the horizontal end plate, the pull rod passes through the second smooth hole, a spring is provided on the pull rod, the spring is located between the connecting plate and the horizontal end plate, a rocker arm is fixedly connected to the connecting block, and a handle is fixedly connected to the side of the pull ring support seat.

[0013] The advantages and positive effects of the present invention are:

[0014] (1) A positioning pin installation device is provided, which integrates a weight-type impact hammer and a guide rod. A plug is provided at the end of the guide rod, and the plug includes a force-applying part and a positioning pin insertion part connected in sequence. By hitting the force-applying part with the weight-type impact hammer, the hammering force indirectly acts on the positioning pin through the force-applying part, and the positioning pin is installed in the positioning pin installation hole in the front housing, thus preventing damage to the end face of the positioning pin caused by direct hitting and greatly protecting the end face of the positioning pin.

[0015] (2) In the splicing gap adjustment device, a gap adjustment gasket is provided to adjust the axial end play of the reducer, so that the gap between the butt-jointed parts reaches the most suitable position, realizing zero backlash and low noise of the reducer. And a gap adjustment gasket sleeve for containing the gap adjustment gasket is provided, making the placement and taking of the entire gap adjustment gasket simple and convenient.

[0016] (3) A reducer rotation test device is provided, which includes a stopping mechanism and a reducer fixing plate. By inserting the stop pin in the stopping mechanism into the moving support plate supporting the reducer, the reducer can be quickly and stably stopped on the assembly line, and the reducer is fixed in different directions and at different angles through the reducer fixing plate, thus completing the all-round and multi-angle rotation test of the reducer.

[0017] (4) In the reducer oil seal disassembly device, the pull rod is threadedly connected to the oil seal pull ring, and the upward movement of the oil seal pull ring can be realized by rotating the pull rod, so that the oil seal gradually leaves the reducer housing; a spring is provided on the pull rod, and the spring is always in a compressed state, which can keep the upper end face of the oil seal pull ring in contact with the upper end face of the pull ring support seat and keep the upper end face of the spring support seat in contact with the lower end face of the connecting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 is a schematic diagram of the connection structure of the assembly stations of the reducer assembly line of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the positioning pin installation device of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of the splicing gap adjustment device of the present invention;

[0022] Figure 4 is a schematic diagram of the structure of the stopping mechanism in the reducer rotation test device of the present invention;

[0023] Figure 5It is a schematic structural diagram during the traveling process of the stopping mechanism in the reducer rotation test device of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the connection between the stopping mechanism and the moving support plate in the reducer rotation test device of the present invention;

[0025] Figure 7 It is a schematic plan view of the reducer fixing disk in the reducer rotation test device of the present invention;

[0026] Figure 8 It is a schematic structural diagram of the rotation test connection of the reducer rotation test device of the present invention;

[0027] Figure 9 It is a schematic sectional view of the oil seal dismounting device of the present invention;

[0028] Figure 10 It is Figure 9 The sectional view taken along line A-A of

[0029] Figure 11 It is a schematic application structure diagram of the oil seal dismounting device of the present invention.

[0030] Explanation of reference numerals:

[0031] 01 - Shafting Assembly Station; 02 - Locating Pin Installation Station; 1 - Locating Pin Installation Device; 11 - Guide Rod; 12 - Weight-Type Impact Hammer; 13 - Plug; 131 - Force-Applied Portion; 132 - Locating Pin Insertion Portion; 14 - Handle; 03 - Splicing Gap Adjustment Station; 2 - Splicing Gap Adjustment Device; 21 - Gap Adjustment Shims; 22 - Gap Adjustment Shim Sleeve; 23 - Gap Adjustment Shim Sleeve Placing Rack; 04 - Glue Coating Station; 05 - Casing Bolting-On Station; 06 - Casing Bolt Tightening Station; 07 - Peripheral Component Assembly Station; 08 - Air Tightness Detection Station; 09 - Rotation Test Station; 3 - Reducer Rotation Test Device; 31 - Stopping Mechanism; 311 - Pressing Rod; 312 - Connecting Rod; 313 - Guide Rod; 314 - Stop Pin; 315 - Return Spring; 316 - Pressing Rod Base; 317 - Stop Pin Base; 318 - Return Spring Base; 32 - Reducer Fixed Disk; 321 - Pin Hole; 322 - Transmission Shaft Insertion Hole; 33 - Motor; 4 - Oil Seal Removal Device; 41 - Pull Ring Support Seat; 411 - Guide Groove; 412 - First Smooth Hole; 413 - Handle; 42 - Long Screw; 43 - Cover; 44 - Oil Seal Pull Ring; 441 - Hook; 45 - Connecting Plate; 46 - Pull Rod; 461 - Spring; 47 - Spring Support Frame; 471 - Horizontal End Plate; 471a - Second Smooth Hole; 472 - Vertical End Plate; 48 - Connecting Block; 481 - Rocker Arm; 5 - Assembly Line Support Bracket; 6 - Moving Support Plate; 61 - Stop Pin Insertion Hole; 7 - Reducer; 8 - Reducer Oil Seal; 9 - Oil Seal Groove; 010 - Experimental Oil Drainage Station; 011 - Oil Filling Plugging Station; 012 - Packaging and Shipping Station. Detailed Embodiment

[0032] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] Such as Figure 1As shown in the figure, the present invention provides a reducer assembly line, which includes a shaft system assembly station 01, a positioning pin installation station 02, a splicing and gap adjustment station 03, a glue application station 04, a box closing and bolt installation station 05, a tightening box closing bolt station 06, a peripheral component assembly station 07, an airtightness detection station 08, a rotation test station 09, an experimental oil draining station 010, an oil filling and plugging station 011, and a packaging and shipping station 012 arranged in sequence. The shaft system assembly station 01 includes assembly tools, the positioning pin installation station 02 includes a positioning pin installation device 1, the splicing and gap adjustment station 03 includes a splicing and gap adjustment device 2, the glue application station 04 includes glue application tools, the box closing and bolt installation station 05, the tightening box closing bolt station 06, and the peripheral component assembly station 07 all include wrenches, the airtightness detection station 08 includes an airtightness leak detector, the rotation test station 09 includes a reducer rotation test device 3, the experimental oil draining station 010 includes a suction pump, the oil filling and plugging station 011 includes an oil plug, and the packaging and shipping station 012 includes a packaging mechanism. Among them, at the shaft system assembly station 01, the differential, the intermediate shaft, and the input shaft are installed into the front housing (relevant patent applications have been made for the shaft system assembly, specifically see 2019214179301 - A reducer shaft system assembly equipment, which will not be elaborated here). The specific assembly tools used include a bracket, an assembly fixture, etc. The bracket is used to support the front housing, and the assembly fixture is used to move the bracket away. At the positioning pin installation station 02, the positioning pin is installed in the front housing of the reducer, and the positioning pin installation device 1 is specifically adopted. At the splicing and gap adjustment station 03, the shim 21 is placed on the end faces of the outer rings of the differential bearings, the intermediate shaft bearings, and the input shaft bearings of the front housing, and the splicing and gap adjustment device 2 is specifically adopted. At the glue application station 04, a plane sealant is applied to the joint surface of the front housing, and the specific glue application tools used include a glue gun, etc. At the box closing and bolt installation station 05, the box is closed and the connecting bolts are placed into the bolt holes; at the tightening box closing bolt station 06, the connecting bolts are tightened; at the peripheral component assembly station 07, peripheral components such as an oil filling port plug, a drain hole magnetic plug, a vent hole vent plug, and a differential oil seal block for the front housing section are installed; the box closing and bolt installation station 05, the tightening box closing bolt station 06, and the peripheral component assembly station 07 all include wrenches, and the wrenches are used to tighten the bolts (plugs). At the airtightness detection station 08, the reducer is connected to the airtightness detector to detect the airtightness of the reducer. The airtightness detection station 08 includes an airtightness leak detector, and the airtightness of the reducer is detected by connecting the airtightness detection mandrel in the airtightness leak detector to the housing. At the rotation test station 09, the reducer is connected to the motor to perform a rotation test on the reducer, and the reducer rotation test device 3 is specifically adopted. At the experimental oil draining station 010, the experimental oil in the rotation test is drained, and a suction pump is specifically used to pump out the test oil in the reducer until it is clean.Lubricate the reducer at the fuel filling and plugging station 011. An oil plug is provided at the fuel filling and plugging station to block the oil drain hole and the oil seal hole of the reducer. Package and ship the reducer at the packaging and shipping station 012, and set up packaging mechanisms such as packing boxes.

[0037] As Figures 2 - 11 shown, the positioning pin installation device 1 includes a guide rod 11 and a weight type impact hammer 12. The weight type impact hammer 12 is slidably sleeved outside the guide rod 11. A plug 13 is connected to the end of the guide rod 11. The plug 13 includes a force application portion 131 and a positioning pin insertion portion 132 connected to each other. The weight type impact hammer 12 is located above the force application portion 131, and the weight type impact hammer 12 can be in contact with the force application portion 131 in the vertical direction during the downward movement.

[0038] Specifically, both the force application portion 131 and the positioning pin insertion portion 132 are cylindrical structures. The diameter of the force application portion 131 is larger than the diameter of the positioning pin insertion portion 132, and the force application portion 131 and the positioning pin insertion portion 132 are connected by an inclined step surface.

[0039] Furthermore, the splicing gap adjusting device 2 includes a gap adjusting gasket 21 and a gap adjusting gasket sleeve 22 for containing the gap adjusting gasket 21. An opening 221 is provided on the side wall of the gap adjusting gasket sleeve 22, and the gap adjusting gasket 21 is stacked inside the gap adjusting gasket sleeve 22.

[0040] The installation of the locating pin is mainly to ensure that the front housing and the rear housing of the reducer can be accurately and securely connected when they are spliced ​​together. However, the existing locating pin installation device is usually a simple guide stick, and is installed by hammering. For the sake of convenience, the device is not even used, and the locating pin is directly installed in the locating pin installation hole by hammering or pressing with a press. These methods all have their disadvantages to a greater or lesser extent. For example, the locating pin may not be installed vertically, which may cause the front and rear housings to be skewed, the docking to be unreliable, and the end face of the locating pin may be damaged by excessive force, or the housing may be damaged during the press-fitting process. The present invention designs the guide rod 11 and the weight-type impact hammer 12 to be connected as one body, the weight-type impact hammer 12 can slide outside the guide rod 11, the end of the guide rod 11 is connected to the plug 13, and the positioning pin sleeve is placed outside the positioning pin insertion part 132 during actual use, and the weight-type impact hammer 12 is lifted to the highest point to make it fall freely and hit the force-applying part 131, and the hammering force acts indirectly on the positioning pin through the force-applying part 131, thereby greatly protecting the end face of the positioning pin and preventing the end face of the positioning pin from being damaged by direct impact. The connection between the guide rod 11 and the plug 13 is a detachable connection including a threaded connection, and the detachable connection makes it possible to select different plugs 13 according to positioning pins of different specifications, and then different specifications of positioning pins are sleeved on the outside of the positioning pin insertion part 132, thereby completing the installation of positioning pins of different specifications. In addition, the oblique step surface in the plug 13 not only plays a guiding role to ensure accurate positioning, but also effectively avoids the problem of difficulty in inserting or removing the positioning pin.

[0041] The gap adjustment gasket 21 is mainly used to adjust the axial movement of the reducer, so that the gap between the docking parts reaches the most suitable position, and the zero backlash and low noise of the reducer are achieved. In this process, gap adjustment gaskets 21 of different specifications and thicknesses need to be used. Therefore, the present invention sets gap adjustment gaskets 21 of different specifications, and is equipped with gap adjustment gasket sleeves 22 of different specifications, and sets a gap adjustment gasket sleeve placement rack 23 on the assembly line side, and arranges the gap adjustment gasket sleeves 22 of different specifications neatly and regularly in the placement area of ​​the gap adjustment gasket sleeve placement rack 23, so that the gap adjustment gasket 21 of any specification can be conveniently used at any time.

[0042] Furthermore, the reducer rotation testing device 3 includes a stopping mechanism 31, and the stopping mechanism 31 includes a pressing rod 311, a connecting rod 312, a guide rod 313 and a stop pin 314 connected in sequence, and the stop pin 314 and the pressing rod 311 are respectively disposed on the inner and outer sides of the assembly line bracket 5, the connecting rod 312 abuts against the bottom of the assembly line bracket 5, and a return spring 315 is sleeved on the outer side of the guide rod 313.

[0043] Specifically, the stopping mechanism 31 further includes a pressing rod 311 base and a retaining pin 314 base. The upper end surface of the retaining pin 314 base is lower than the assembly line bracket 5. The retaining pin 314 is located in the retaining pin 314 base, and the retaining pin 314 protrudes above the assembly line bracket 5. The pressing rod 311 is located in the pressing rod 311 base.

[0044] Specifically, the reducer rotation test device 3 further includes a reducer fixing plate 32. A plurality of pin holes 321 are circumferentially and evenly distributed on the reducer fixing plate 32. The pin holes 321 are of an oblong hole-shaped structure. A transmission shaft insertion hole 322 is provided at the center of the reducer fixing plate 32.

[0045] The reducer rotation test device 3 includes a stopping mechanism 31 for quickly stopping the reducer 7 on the assembly line bracket 5 and a reducer fixing plate 32 for fixing the reducer 7 at different angles and in different directions. During the actual assembly process of the reducer 7, the reducer 7 is placed on the moving pallet 6, and the moving pallet 6 is slidably connected to the assembly line bracket 5 (in the assembly of the reducer 7 in the present invention, manual assembly is mainly adopted, and the reducer 7 is slid on the assembly line bracket 5 composed of non-powered rollers by manual pushing and sliding). During the actual operation process, when the pressing rod 311 is pressed downward, the guide rod 313 and the retaining pin 314 move downward, and the retaining pin 314 retracts into the retaining pin base 317. At the same time, the wider retaining pin 314 moves downward to contact and squeeze and cooperate with the return spring base 318 to compress the return spring 315; when the pressing rod 311 is released (no longer squeezed), the return spring 315 rebounds, and the retaining pin 314 returns to its initial state under the action of the return spring 315 and protrudes from the retaining pin base 317, so as to realize the extension and retraction of the retaining pin 314 in the advancing route of the reducer. Since the reducer 7 needs to be subjected to motor rotation tests in different directions and at different angles during the production and assembly process, the present invention provides a reducer fixing plate 32 that can fix the reducer 7 at different angles and in different directions. That is, the reducer 7 is placed vertically and rotated to a certain angle (inclination), and then fixed to the reducer fixing plate 32 with bolts for rotation testing; then the bolts are removed, and then adjusted to another angle, and then fixed to the reducer fixing plate 32 with bolts for another rotation test; repeat the above operations to complete multiple rotation tests of the reducer 7 at multiple angles and in multiple directions.

[0046] Further, it further includes an oil seal dismounting device 4 for removing the oil seal. During the assembly process of the reducer, an oil seal needs to be installed for sealing to prevent the leakage of lubricating oil. The reasonable installation of the oil seal plays a very important role in the sealing of the reducer. The outer edge of the oil seal is in interference fit with the inner hole of the housing, and it is required that the oil seal and the housing remain relatively stationary during use and the two will not separate. The reducer generally needs to be used continuously online, and the oil seal belongs to a vulnerable part. During the use process and the assembly process, the oil seal of the reducer may be damaged, and if the oil seal is not installed in place during the assembly process of the reducer, the oil seal needs to be disassembled and replaced in time. However, the existing oil seal dismounting tools often cause mechanical damage to the oil seal and the surrounding parts. Therefore, the present invention provides an oil seal dismounting device 4 for removing the oil seal.

[0047] Specifically, the oil seal dismounting device 4 includes a pull ring support seat 41, and the pull ring support seat 41 is connected with a retaining cover 43 through a long screw 42; a guide groove 411 is arranged on the pull ring support seat 41, and an oil seal pull ring 44 is movably connected in the guide groove 411; a connecting plate 45 is arranged on the upper part of the oil seal pull ring 44, and the connecting plate 45 is located above the pull ring support seat 41; a hook 441 is arranged on the lower part of the oil seal pull ring 44; a pull rod 46 is threadedly connected through the connecting plate 45; the pull rod 46 passes through the pull ring support seat 41; a spring support frame 47 is fixedly connected to the top of the pull ring support seat 41; the spring support frame 47 is formed by connecting a horizontal end plate 471 and a vertical end plate 472; the pull rod 46 passes through the horizontal end plate 471; a connecting block 48 is fixedly connected to the upper end of the pull rod 46, and the connecting block 48 is located above the horizontal end plate 471.

[0048] Specifically, a first smooth hole 412 is arranged on the pull ring support seat 41, the pull rod 46 passes through the first smooth hole 412, a second smooth hole 471a is arranged on the horizontal end plate 471, the pull rod 46 passes through the second smooth hole 471a, a spring 461 is arranged on the pull rod 46, the spring 461 is located between the connecting plate 45 and the horizontal end plate 471, a rocker arm 481 is fixedly connected to the connecting block 48, and a handle 413 is fixedly connected to the side of the pull ring support seat 41.

[0049] The operation process of the present invention includes the following steps: 1. Assembly of the shafting; 2. Installation of the positioning pin: Place the positioning pin sleeve outside the positioning pin insertion part 132 of the plug 13, and place it on the positioning pin installation hole of the front housing to be introduced, so that the chamfers of the positioning pin and the positioning pin installation hole cooperate with each other. Then keep the guiding rod 11 vertical, lift the weight impact hammer 12 to the highest position and let it fall freely to strike the force application part 131. By continuously striking the force application part 131 of the plug 13 with the weight impact hammer 12, the hammering force indirectly acts on the positioning pin through the force application part 131, and the positioning pin is installed in the positioning pin installation hole in the front housing. 3. Installation of the shim 21: Select a suitable shim 21 and place it on the end face of the outer ring of the differential bearing, the end face of the outer ring of the intermediate shaft bearing, and the end face of the outer ring of the input shaft bearing in the front housing for installation. 4. Gluing and bolting: Apply a plane sealant to the joint surface of the front housing at the gluing station 04. At the box closing and bolt installation station 05, close the box and place the connecting bolts into the bolt holes. At the tightening station 06 of the box closing bolts, tighten the connecting bolts. 5. Assembly of peripheral components: Install the oil filling port plug, the magnetic plug for the drain hole, the vent plug for the vent hole, and install the differential oil seal block for the front housing section, etc. After sequentially performing the above steps 1, 2, 3, 4, and 5, the splicing of the front housing and the rear housing of the reducer is completed, and the assembled reducer is obtained.

[0050] 6. Air tightness detection of the reducer: Place the front housing of the assembled reducer face down stably, connect the air tightness detection mandrel in the air tightness detector to the housing, open the air inlet switch, detect the internal pressure, and remove the air tightness detection mandrel after the detection is completed. 7. Rotation test of the reducer: Press down the pressing rod 311, and the retaining pin 314 moves downward and extends out of the traveling route of the reducer; Slide the moving support plate 6 carrying the reducer on the assembly line support 5 until the retaining pin insertion hole 61 in the moving support plate 6 is directly above the retaining pin 314; Then release the pressing rod 311, and the retaining pin 314 moves upward under the action of the return spring 315 to restore its initial state and penetrates into the retaining pin insertion hole 61 of the moving support plate 6, thereby clamping the moving support plate 6 to stop it on the assembly line support 5, completing the stop of the reducer. Then the front housing end of the reducer is downward and flat; Use an oil filling gun to fill the experimental oil into the rear housing oil seal hole of the reducer. After filling is completed, plug the rear housing oil seal hole with a differential oil plug. Finally, stand the reducer upright and adjust it to a certain angle (such as Figure 8 shown), use bolts to fix the reducer to the reducer fixing plate 32 through the pin holes 321, pass the transmission shaft on the motor 33 through the transmission shaft insertion hole 322 in the center of the reducer fixing plate 32 and cooperate with the reducer for assembly connection, start the motor 33 for a rotation test; Remove the bolts to release the fixed connection between the reducer and the reducer fixing plate 32, readjust the reducer to another certain angle, and then fix it to the reducer fixing plate 32 with bolts for another rotation test; Repeat the above operations until the multi-directional and multi-angle rotation test of the reducer is completed.

[0051] 8. Drain the test oil: Place the front housing end of the reducer downward and flat, remove the magnetic plug at the drain hole, connect the nozzle of the oil suction pump to the drain hole, place the reducer upright, turn on the oil suction pump, and drain all the test oil in the reducer. 9. Plug the oil filling hole and package for shipment: Fill the reducer with oil and package it for shipment.

[0052] In addition, when the oil seal is not properly installed during the assembly process, is damaged accidentally during assembly, or is damaged after long-term use of the reducer, the oil seal removal device is used to remove the oil seal for timely replacement. The steps for removing the oil seal are as follows: First, rotate the rocker arm 481, and the pull rod 46 rotates. Under the action of the spring 461, the horizontal end plate 471 of the spring support frame 47 always presses tightly against the connecting block 48, and the pull rod 46 will not move up and down. Since the pull rod 46 is threadedly connected to the connecting plate 45 of the oil seal pull ring 44, the rotation of the pull rod 46 can cause the oil seal pull ring 44 to move up and down on the pull rod 46. Adjust the position of the oil seal pull ring 44 so that the oil seal pull ring 44 is at a lower position; hold the handle 413 and make the lower end face of the pull ring support 41 fit against the end face of the reducer; make the hook 441 at the lower part of the oil seal pull ring 44 enter the oil seal slot 9 on the reducer oil seal 8, and the hook 441 hooks the bottom of the oil seal; hold the handle 413 with one hand, press down the connecting block 48 with the other hand while rotating the rocker arm 481, and the oil seal pull ring 44 moves upward as the pull rod 46 rotates, and the hook 441 hooks the bottom of the reducer oil seal 8 to lift the reducer oil seal 8; loosen the oil seal pull ring 44, adjust the position of the oil seal pull ring 44, and repeat the above steps at the oil seal slot 9 in the other direction of the reducer oil seal 8 to remove the oil seal.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reducer assembly line, characterized in that: it includes, in sequence, a shaft system assembly station, a positioning pin installation station, a splicing gap adjustment station, a gluing station, a box closing and bolt installation station, a box closing bolt tightening station, a peripheral component assembly station, an airtightness detection station, a rotation test station, an experimental oil draining station, an oil filling and plugging station, and a packaging and shipping station. The shaft system assembly station includes assembly tools, the positioning pin installation station includes a positioning pin installation device, the splicing gap adjustment station includes a splicing gap adjustment device, the gluing station includes gluing tools, the box closing and bolt installation station, the box closing bolt tightening station, and the peripheral component assembly station all include wrenches, the airtightness detection station includes an airtight leak detector, the rotation test station includes a reducer rotation test device, the experimental oil draining station includes an oil extraction pump, the oil filling and plugging station includes an oil plug, and the packaging and shipping station includes a packaging mechanism; The positioning pin installation device includes a guide rod and a weight type impact hammer. The weight type impact hammer is slidably sleeved outside the guide rod. The end of the guide rod is connected with a plug. The plug includes a connected force application part and a positioning pin insertion part. The weight type impact hammer is located above the force application part. During the downward movement of the weight type impact hammer, it can be in contact with the force application part in the vertical direction; The reducer rotation test device includes a stopping mechanism. The stopping mechanism includes a pressing rod, a connecting rod, a guide rod, and a retaining pin connected in sequence. The retaining pin and the pressing rod are respectively located inside and outside the assembly line bracket. The connecting rod abuts against the lower part of the assembly line bracket. A return spring is sleeved outside the guide rod; Both the force application part and the positioning pin insertion part are cylindrical structures. The diameter of the force application part is larger than that of the positioning pin insertion part. The force application part and the positioning pin insertion part are connected by an inclined stepped surface; The reducer assembly line further includes an oil seal disassembly device. The oil seal disassembly device includes a pull ring support seat. The pull ring support seat is connected with a retaining cover through a long screw; a guide groove is provided on the pull ring support seat. An oil seal pull ring is movably connected in the guide groove; a connecting plate is provided on the upper part of the oil seal pull ring. The connecting plate is located above the pull ring support seat; the lower part of the oil seal pull ring has a hook; the connecting plate is threadedly connected with a pull rod; the pull rod passes through the pull ring support seat; a spring support frame is fixedly connected to the top of the pull ring support seat; the spring support frame is formed by connecting a horizontal end plate and a vertical end plate; the pull rod passes through the horizontal end plate; the upper end of the pull rod is fixedly connected with a connecting block. The connecting block is located above the horizontal end plate; A spring is provided on the pull rod. The spring is located between the connecting plate and the horizontal end plate. A rocker arm is fixedly connected to the connecting block. A handle is fixedly connected to the side of the pull ring support seat.

2. The reducer assembly line according to claim 1, characterized in that, the splicing gap adjustment device includes a gap adjustment gasket and a gap adjustment gasket sleeve for containing the gap adjustment gasket. An opening is provided on the side wall of the gap adjustment gasket sleeve. The gap adjustment gaskets are stacked in the gap adjustment gasket sleeve.

3. The reducer assembly line according to claim 1, characterized in that, the stopping mechanism further includes a pressing rod base and a retaining pin base. The upper end surface of the retaining pin base is lower than the upper end surface of the assembly line bracket. The retaining pin is located in the retaining pin base. The retaining pin protrudes above the upper end surface of the assembly line bracket. The pressing rod is located in the pressing rod base.

4. The reducer assembly line according to claim 1, characterized in that, The reducer rotation test device further includes a reducer fixing disk. A plurality of pin holes are circumferentially and uniformly distributed on the reducer fixing disk. The pin holes are in the shape of oblong holes, and a transmission shaft insertion hole is provided at the center of the reducer fixing disk.

5. The reducer assembly line according to claim 1, characterized in that, a first smooth hole is provided on the pull ring support seat, the pull rod passes through the first smooth hole, a second smooth hole is provided on the horizontal end plate, and the pull rod passes through the second smooth hole.

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