An assembly device and method for a reduction gearbox

Abstract

The application belongs to the technical field of automobile manufacturing, and particularly relates to an assembling device and an assembling method for a reduction gearbox. The assembling device comprises a bottom plate, a turnover mechanism, a positioning and locking mechanism and a mounting portion surrounding the outer side of the bottom plate. The positioning and locking mechanism is used for positioning between the bottom plate and the mounting portion, and after positioning is completed, the bottom plate is locked and fixed on the mounting portion. The output end of the turnover mechanism is fixedly connected with the mounting portion, and the turnover mechanism is used for driving the mounting portion to turn over by 180 degrees. Three first positioning portions are arranged on the bottom plate, and the three first positioning portions are respectively used for positioning the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate. A plurality of positioning pins are arranged on the mounting portion, and each positioning pin is used for being detachably fixedly connected with a first side shell after penetrating through different positioning holes on the outer edge connecting surface of the first side shell of the reduction gearbox. The assembling between the first side shell and the top end of the input shaft assembly, the top end of the intermediate shaft assembly and the top end of the output shaft assembly positioned on the bottom plate is completed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile manufacturing, and particularly relates to an assembly device and an assembly method for a reduction gearbox. BACKGROUND

[0002] During manual assembly of the reduction gearbox, the shell of the reduction gearbox needs to be turned over. It is difficult to turn over the shell of the reduction gearbox manually for a heavy reduction gearbox. In order to solve the above problem, the existing technology usually uses an assembly table or a turnover trolley as an assembly device for the reduction gearbox to turn over the shell of the reduction gearbox, so as to reduce the labor intensity of workers during assembly and disassembly of the reduction gearbox and facilitate the workers to install parts such as an input shaft assembly, an intermediate shaft assembly and an output shaft assembly in the reduction gearbox.

[0003] However, the existing assembly table or turnover trolley does not have an automatic positioning function for the input shaft assembly, the intermediate shaft assembly and the output shaft assembly of the reduction gearbox. During assembly of the reduction gearbox, the workers need to manually position and install the input shaft assembly, the intermediate shaft assembly and the output shaft assembly, which is complicated to operate, consumes a long time and is prone to installation errors. SUMMARY

[0004] The present application provides an assembly device and an assembly method for a reduction gearbox, which solve the technical problem that the existing assembly table or turnover trolley does not have an automatic positioning function for the input shaft assembly, the intermediate shaft assembly and the output shaft assembly of the reduction gearbox. During assembly of the reduction gearbox, the workers need to manually position and install the input shaft assembly, the intermediate shaft assembly and the output shaft assembly, which is complicated to operate, consumes a long time and is prone to installation errors.

[0005] The technical solution adopted by the present application is as follows: an assembly device for a reduction gearbox, comprising a bottom plate, a turnover mechanism, a positioning and locking mechanism and a mounting portion surrounding the outside of the bottom plate; the positioning and locking mechanism is used for positioning between the bottom plate and the mounting portion, and locking and fixing the bottom plate on the mounting portion after positioning is completed; the output end of the turnover mechanism is fixedly connected with the mounting portion, and the turnover mechanism is used for driving the mounting portion to turn over by 180 degrees;

[0006] Three first positioning portions are arranged on the bottom plate, and the three first positioning portions are respectively used for supporting the bottom end of the input shaft assembly, the bottom end of the intermediate shaft assembly and the bottom end of the output shaft assembly of the reduction gearbox when the mounting portion is in an initial position, so as to position the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate respectively;

[0007] The mounting portion is provided with a plurality of positioning pins, each of which is used for passing through different positioning holes on the outer edge connecting surface of the first side shell of the reduction box and is detachably fixedly connected with the first side shell; so as to fix the opening of the first side shell downward on the mounting portion, and complete the assembly between the first side shell and the top end of the input shaft assembly, the top end of the intermediate shaft assembly and the top end of the output shaft assembly positioned on the bottom plate.

[0008] By adjusting the mounting portion to the initial position first, positioning between the bottom plate and the mounting portion is completed by using the positioning and locking mechanism, and after positioning is completed, the bottom plate is locked and fixed on the mounting portion; then by providing three first positioning portions on the bottom plate, the three first positioning portions are respectively used for supporting the bottom end of the input shaft assembly, the bottom end of the intermediate shaft assembly and the bottom end of the output shaft assembly of the reduction box when the mounting portion is in the initial position, so as to position the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate respectively; then by cooperation between each positioning pin and different positioning holes on the outer edge connecting surface of the first side shell of the reduction box, the opening of the first side shell is fixed downward on the mounting portion, the positioning between the input shaft assembly, the intermediate shaft assembly and the output shaft assembly positioned on the bottom plate and the first side shell is completed, and the assembly between the first side shell and the top end of the input shaft assembly, the top end of the intermediate shaft assembly and the top end of the output shaft assembly positioned on the bottom plate is completed; automatic positioning between the first side shell, the input shaft assembly, the intermediate shaft assembly and the output shaft assembly is realized; after the assembly between the first side shell and the top end of the input shaft assembly, the top end of the intermediate shaft assembly and the top end of the output shaft assembly positioned on the bottom plate is completed, the mounting portion can be driven by the turnover mechanism to turn over 180 degrees from the initial position, and after the bottom plate is detached from the mounting portion, the second side shell of the reduction box is mounted on the first side shell, the installation of the shell of the reduction box (the shell of the reduction box is assembled by the first side shell and the second side shell) is completed, and the technical problems that the existing assembly table or turnover trolley and the like do not have automatic positioning function for the input shaft assembly, the intermediate shaft assembly and the output shaft assembly of the reduction box, and the input shaft assembly, the intermediate shaft assembly and the output shaft assembly need to be positioned and installed manually by workers when the reduction box is assembled, the operation is complicated, a long working time is consumed, and installation errors are prone to occur are solved.

[0009] Further, the first positioning portion is a first sliding table, and any first sliding table can slide on the bottom plate to approach the other two first sliding tables until reaching the positioning position, or to move away from the other two first sliding tables.

[0010] In the technical scheme that the three first positioning parts are fixed on the bottom plate, when the input shaft assembly, the intermediate shaft assembly and the output shaft assembly are respectively installed on the three first positioning parts, the gears on the input shaft assembly, the intermediate shaft assembly and the output shaft assembly will interfere with each other; therefore, when the input shaft assembly, the intermediate shaft assembly and the output shaft assembly are installed on the three first positioning parts, an operator needs to first complete the power connection between the input shaft assembly, the intermediate shaft assembly and the output shaft assembly (i.e., complete the meshing between the gears in the input shaft assembly, the intermediate shaft assembly and the output shaft assembly), so that the input shaft assembly, the intermediate shaft assembly and the output shaft assembly form an integrated power transmission unit, and then the power transmission unit is integrally installed on the three first positioning parts, so that the first positioning parts respectively support the bottom end of the input shaft assembly, the bottom end of the intermediate shaft assembly and the bottom end of the output shaft assembly, to complete the positioning of the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate.

[0011] By setting the three first positioning parts as first sliding tables, the three first sliding tables can be moved away from each other, so that when the input shaft assembly, the intermediate shaft assembly and the output shaft assembly are respectively installed on the three first sliding tables, the gears on the input shaft assembly, the intermediate shaft assembly and the output shaft assembly will not interfere with each other; after the input shaft assembly, the intermediate shaft assembly and the output shaft assembly are respectively installed on the three first sliding tables, the three first sliding tables can be moved close to each other until each first sliding table reaches the position for positioning the input shaft assembly, the intermediate shaft assembly or the output shaft assembly, to complete the positioning of the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate, and also complete the power connection between the input shaft assembly, the intermediate shaft assembly and the output shaft assembly (i.e., complete the meshing between the gears in the input shaft assembly, the intermediate shaft assembly and the output shaft assembly); manual power connection between the input shaft assembly, the intermediate shaft assembly and the output shaft assembly is not required, which improves the power connection precision between the input shaft assembly, the intermediate shaft assembly and the output shaft assembly, simplifies the assembly process of the reduction box and saves labor hours.

[0012] During the process of the turning mechanism driving the mounting portion to turn 180 degrees from the initial position, since the input shaft assembly, the intermediate shaft assembly and the output shaft assembly are clamped between the corresponding first sliding table and the first side shell, and the assembly between the first side shell and the top end of the input shaft assembly, the top end of the intermediate shaft assembly and the top end of the output shaft assembly positioned on the bottom plate is completed, the first sliding table generally does not slip during the turning, and the input shaft assembly, the intermediate shaft assembly and the output shaft assembly are offset.

[0013] Further, the assembly device of the reduction gearbox further comprises a locking mechanism, and one locking mechanism is arranged on each first sliding table, and the locking mechanism is used to lock the position of the first sliding table on the bottom plate when the corresponding first sliding table reaches the positioning position.

[0014] By arranging the locking mechanism, when the first sliding table reaches the positioning position (i.e. the first sliding table reaches the position of the input shaft assembly, the intermediate shaft assembly or the output shaft assembly), the position of the first sliding table on the bottom plate can be locked, which can further avoid the first sliding table slipping and the input shaft assembly, the intermediate shaft assembly and the output shaft assembly being offset during the process of the turning mechanism driving the mounting portion to turn 180 degrees from the initial position.

[0015] Further, the assembly device of the reduction gearbox further comprises a second positioning portion and a second sliding table arranged on the bottom plate.

[0016] The second positioning portion is used to support the bottom end of the shift fork shaft of the shift fork assembly of the reduction gearbox and position the shift fork assembly.

[0017] The second sliding table is used to support the shift drum assembly of the reduction gearbox, and the second sliding table can move along the horizontal direction to approach the second positioning portion and the three first positioning portions, and lock after reaching the first preset position to position the shift drum assembly, or move away from the second positioning portion and the three first positioning portions.

[0018] By setting the second positioning part and the second sliding table, the fork shaft of the fork assembly can be supported by the second positioning part after the fork of the fork assembly is assembled with the synchronizer on the input shaft assembly or the intermediate shaft assembly, and the positioning of the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate is completed; after the second sliding table is slid away from the second positioning part and the three first positioning parts, the gear shift drum assembly is installed on the second sliding table, and then the second sliding table is slid to approach the second positioning part and the three first positioning parts, and is locked after reaching the first preset position, so that the positioning of the gear shift drum assembly on the bottom plate is completed, and the connection between the gear shift drum assembly and the fork assembly is completed (specifically, the connecting rod of the fork assembly is inserted into the ring groove of the gear shift drum assembly); compared with the technical solution of directly positioning the gear shift drum assembly on the bottom plate, the problem that the connecting rod of the fork assembly cannot be inserted into the ring groove of the gear shift drum assembly can be avoided.

[0019] Further, the second positioning part is a telescopic positioning rod, which is vertically arranged on the bottom plate, and one end of the telescopic positioning rod away from the bottom plate can be extended to a second preset position and fixed to support the positioning of the fork shaft.

[0020] By setting the second positioning part as a telescopic positioning rod, after the positioning of the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate is completed, the one end of the telescopic positioning rod away from the bottom plate is first retracted, and then the fork of the fork assembly is assembled with the synchronizer on the input shaft assembly or the intermediate shaft assembly, and then the one end of the telescopic positioning rod away from the bottom plate can be extended to the second preset position and fixed to support the positioning of the fork shaft, so that the positioning of the fork assembly on the bottom plate is completed, without the need to pre-assemble the fork of the fork assembly with the synchronizer on the input shaft assembly or the intermediate shaft assembly, and then complete the positioning of the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate, which facilitates the installation and positioning of the fork assembly.

[0021] According to the assembly device and the assembly method of the reduction gearbox provided by the application, the assembly method comprises the following steps:

[0022] Step 1: adjusting the mounting part to an initial position;

[0023] Step 2: after the positioning between the bottom plate and the mounting part is completed by the positioning and locking mechanism, locking and fixing the bottom plate on the mounting part;

[0024] Step 3: Positioning the input shaft assembly, the intermediate shaft assembly and the output shaft assembly of the reduction gearbox on the base plate respectively through three first positioning parts on the base plate;

[0025] Step 4: Installing the opening of the first side housing of the reduction gearbox on the mounting part downwards, completing the assembly between the first side housing and the top end of the input shaft assembly, the top end of the intermediate shaft assembly and the top end of the output shaft assembly positioned on the base plate;

[0026] Step 5: After driving the mounting part to flip 180 degrees from the initial position through the flipping mechanism, dismounting the base plate from the mounting part;

[0027] Step 6: After installing other parts of the reduction gearbox into the first side housing, installing the second side housing of the reduction gearbox onto the first side housing, completing the installation of the reduction gearbox.

[0028] Further, the step 3 comprises the following sub-steps:

[0029] S301: Sliding three first sliding platforms of three first positioning parts, making three first sliding platforms away from each other;

[0030] S302: Installing the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on three first sliding platforms respectively;

[0031] S303: Sliding three first sliding platforms of three first positioning parts, making three first sliding platforms close to each other; until each first sliding platform reaches the position of positioning the input shaft assembly, the intermediate shaft assembly or the output shaft assembly; completing the positioning of the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the base plate.

[0032] Further, the step 3 further comprises a sub-step S304: locking the position of three first sliding platforms on the base plate through the locking mechanism on the first sliding platform.

[0033] In another technical solution, in the step 3, further positioning the shift fork assembly of the reduction gearbox on the base plate through the second positioning part on the base plate; positioning the shift drum assembly of the reduction gearbox on the base plate through the second sliding platform on the base plate.

[0034] Further, the method of positioning the shift fork shaft of the shift fork assembly of the reduction gearbox on the base plate through the second positioning part on the base plate; and positioning the shift drum assembly of the reduction gearbox on the base plate through the second sliding platform on the base plate comprises the following sub-steps:

[0035] Sliding the second sliding table, so that the second sliding table is away from the second positioning part and three first positioning parts, after installing the shift drum assembly to the second sliding table;

[0036] Retracting the telescopic positioning rod of the second positioning part;

[0037] The shift fork of the shift fork assembly is installed into the shift fork groove of the synchronizer on the input shaft assembly or the intermediate shaft assembly;

[0038] The telescopic positioning rod is extended to a second preset position away from one end of the bottom plate and fixed to support the positioning of the shift fork shaft, completing the positioning of the shift fork assembly;

[0039] Sliding the second sliding table, so that the second sliding table is away from the second positioning part and three first positioning parts, after installing the shift drum assembly to the second sliding table; BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The three-dimensional structure diagram of the assembly device of the reduction gearbox in the embodiment;

[0041] Figure 2 The assembly structure diagram of the assembly device of the reduction gearbox, the input shaft assembly, the intermediate shaft assembly, the output shaft assembly, the shift drum assembly and the shift fork assembly in the embodiment Figure 1 ;

[0042] Figure 3 The assembly structure diagram of the assembly device of the reduction gearbox, the input shaft assembly, the intermediate shaft assembly, the output shaft assembly, the shift drum assembly and the shift fork assembly in the embodiment Figure 2 ;

[0043] Figure 4 The assembly structure diagram of the assembly device of the reduction gearbox, the input shaft assembly, the intermediate shaft assembly, the output shaft assembly, the shift drum assembly, the shift fork assembly and the first side shell in the embodiment;

[0044] Figure 5 The three-dimensional structure diagram of the positioning block in the embodiment;

[0045] Figure 6 The three-dimensional structure diagram of the second positioning part in the embodiment;

[0046] Wherein: 1 - bottom plate, 2 - positioning locking mechanism, 3 - mounting part, 4 - first sliding table, 5 - first side shell, 6 - input shaft assembly, 7 - intermediate shaft assembly, 8 - output shaft assembly, 9 - locking mechanism, 10 - second positioning part, 11 - second sliding table, 12 - shift fork assembly, 13 - shift drum assembly, 14 - first sliding rod, 15 - second sliding rod;

[0047] 1.1 - first chute, 1.2 - second chute, 1.3 - limiting block;

[0048] 1.3.1 - first limiting groove;

[0049] 2.1 - lock, 2.2 - positioning plate, 2.3 - clamping plate, 2.4 - side plate;

[0050] 3.1 - positioning pin, 3.2 - connecting part, 3.3 - positioning block;

[0051] 3.3.1 - positioning groove;

[0052] 6.1 - synchronizer;

[0053] 9.1 - rotating part, 9.2 - positioning rod;

[0054] 10.1 - third sliding rod, 10.2 - positioning seat;

[0055] 10.1.1 - limiting column, 10.2.1 - second limiting groove. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application:

[0057] As shown in the drawings, Figures 1 to 4 The embodiment provides an assembling device for a reduction gearbox, which comprises a bottom plate 1, a turnover mechanism, a positioning and locking mechanism 2 and a mounting part 3 surrounding the outside of the bottom plate 1; the positioning and locking mechanism 2 is used for positioning between the bottom plate 1 and the mounting part 3, and locking and fixing the bottom plate 1 on the mounting part 3 after the positioning is completed; the output end of the turnover mechanism is fixedly connected with the mounting part 3, and the turnover mechanism is used for driving the mounting part 3 to turn over by 180 degrees;

[0058] The bottom plate 1 is provided with three first positioning parts, which are respectively used for supporting the bottom end of an input shaft assembly 6, the bottom end of an intermediate shaft assembly 7 and the bottom end of an output shaft assembly 8 of the reduction gearbox when the mounting part 3 is in an initial position, so as to position the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1 respectively;

[0059] The mounting part 3 is provided with a plurality of positioning pins 3.1, each of which is used for being fixedly connected with the first side shell 5 in a detachable mode after penetrating through different positioning holes on the outer edge connecting surface of the first side shell 5 of the reduction gearbox; so as to fix the opening of the first side shell 5 downward on the mounting part 3, and complete the assembly between the first side shell 5 and the top end of the input shaft assembly 6, the top end of the intermediate shaft assembly 7 and the top end of the output shaft assembly 8 positioned on the bottom plate 1.

[0060] By first adjusting the mounting portion 3 to the initial position, positioning between the bottom plate 1 and the mounting portion 3 is completed by using the positioning and locking mechanism 2, and after the positioning is completed, the bottom plate 1 is locked and fixed on the mounting portion 3; then by providing three first positioning portions on the bottom plate 1, the three first positioning portions are respectively used to support the bottom end of the input shaft assembly 6 of the reduction box, the bottom end of the intermediate shaft assembly 7, and the bottom end of the output shaft assembly 8 when the mounting portion 3 is in the initial position, so as to position the input shaft assembly 6, the intermediate shaft assembly 7, and the output shaft assembly 8 on the bottom plate 1 respectively; then by cooperation between each positioning pin 3.1 and different positioning holes on the outer edge connecting surface of the first side shell 5 of the reduction box, the opening of the first side shell 5 is fixed downward on the mounting portion 3, the positioning between the input shaft assembly 6, the intermediate shaft assembly 7, and the output shaft assembly 8 positioned on the bottom plate 1 and the first side shell 5 is completed, and the assembly between the first side shell 5 and the top end of the input shaft assembly 6, the top end of the intermediate shaft assembly 7, and the top end of the output shaft assembly 8 positioned on the bottom plate 1 is completed; automatic positioning between the first side shell 5, the input shaft assembly 6, the intermediate shaft assembly 7, and the output shaft assembly 8 is realized; after the assembly between the first side shell 5 and the top end of the input shaft assembly 6, the top end of the intermediate shaft assembly 7, and the top end of the output shaft assembly 8 positioned on the bottom plate 1 is completed, the mounting portion 3 can be driven by the turnover mechanism to turn 180 degrees from the initial position, and then the bottom plate 1 is detached from the mounting portion 3, the second side shell of the reduction box is mounted on the first side shell 5, the installation of the shell of the reduction box (the shell of the reduction box is assembled by the first side shell 5 and the second side shell) is completed, and the technical problems that the existing assembly table or turnover trolley and the like do not have automatic positioning function for the input shaft assembly 6, the intermediate shaft assembly 7, and the output shaft assembly 8 of the reduction box, and the input shaft assembly 6, the intermediate shaft assembly 7, and the output shaft assembly 8 need to be positioned and installed manually by workers when the reduction box is assembled, the operation is complicated, the working hours are long, and installation errors are prone to occur are solved.

[0061] Among them, the positioning and locking mechanism 2 has multiple setting schemes, including but not limited to: by providing positioning bolts and positioning screw holes on the bottom plate 1 and the mounting portion 3 respectively, and by cooperation between the positioning bolts and the positioning screw holes, the positioning of the bottom plate 1 on the mounting portion 3 is realized, and the bottom plate 1 is locked and fixed on the mounting portion 3.

[0062] In the embodiment, as shown in Figure 2 and Figure 3 , the number of the positioning and locking mechanisms 2 is multiple, and the multiple positioning and locking mechanisms 2 are circumferentially spaced apart on the outer periphery of the bottom plate 1; specifically, in the embodiment, the number of the positioning and locking mechanisms 2 is three, and the three positioning and locking mechanisms 2 are circumferentially spaced apart on the outer periphery of the bottom plate 1, and the bottom end of the mounting portion 3 is provided with three positioning blocks 3.3 corresponding to the three positioning and locking mechanisms 2, and the three positioning blocks 3.3 are circumferentially spaced apart on the bottom end of the mounting portion 3.

[0063] Each positioning and locking mechanism 2 comprises a clasp 2.1, a positioning plate 2.2, a clamping plate 2.3 and a side plate 2.4; the mounting portion 3 is a C-shaped arm arranged horizontally;

[0064] As shown in Figure 3 and Figure 5 , the top end of the positioning block 3.3 is fixedly connected with the bottom end of the mounting portion 3 (that is, when the mounting portion 3 is located at the initial position, the three positioning blocks 3.3 are all located at the lower side of the mounting portion 3), the bottom end of the positioning block 3.3 is provided with a positioning groove 3.3.1, the positioning groove 3.3.1 of the positioning block 3.3 is used for cooperation with the positioning plate 2.2 of the corresponding positioning and locking mechanism 2; the top end of the positioning block 3.3 is provided with a lock groove; the two ends of the lock groove respectively penetrate to the inner side of the positioning block 3.3 and the outer side of the positioning block 3.3;

[0065] As shown in Figure 2 , one end of the positioning plate 2.2 close to the bottom plate 1 (that is, one end of the positioning plate 2.2 in the length direction) is used for fixedly connected with the bottom plate 1, one end of the positioning plate 2.2 close to the bottom plate 1 is correspondingly provided with a side plate 2.4, the side plate 2.4 is arranged perpendicularly to the positioning plate 2.2; the length direction of the positioning plate 2.2 on the side plate 2.4 is provided with a through hole;

[0066] The clamping plate 2.3 is arranged parallel to the positioning plate 2.2, one end of the clamping plate 2.3 of the positioning and locking mechanism 2 close to the bottom plate 1 (that is, one end of the clamping plate 2.3 in the length direction) is used for sequentially penetrating through the lock groove of the corresponding positioning block 3.3 and the through hole on the side plate 2.4 of the positioning and locking mechanism 2, so that one end of the clamping plate 2.3 of the positioning and locking mechanism 2 close to the bottom plate 1 is located at the inner side of the side plate 2.4 of the positioning and locking mechanism 2, the other end of the clamping plate 2.3 of the positioning and locking mechanism 2 away from the bottom plate 1 (that is, the other end of the clamping plate 2.3 in the length direction) is located at the outer side of the positioning block 3.3.

[0067] The other end of the clamping plate 2.3 away from the bottom plate 1 is fixedly connected with the clasp 2.1, the clasp 2.1 is used for locking the other end of the clamping plate 2.3 away from the bottom plate 1 and the other end of the positioning plate 2.2 away from the bottom plate 1; so that the positioning plate 2.2 and the clamping plate 2.3 of the positioning and locking mechanism 2 clamp the corresponding positioning block 3.3 (at this time, the positioning plate 2.2 is pressed on the groove bottom of the positioning groove 3.3.1 of the corresponding positioning block 3.3, and the clamping plate 2.3 is pressed on the groove bottom of the lock groove of the corresponding positioning block 3.3);

[0068] By cooperating the three positioning plates 2.2 in the corresponding positioning grooves 3.3.1 respectively, the positioning between the bottom plate 1 and the mounting portion 3 can be realized, and by clamping the corresponding positioning block 3.3 between the positioning plate 2.2 and the clamping plate 2.3, the bottom plate 1 can be locked and fixed on the mounting portion 3 after the positioning between the bottom plate 1 and the mounting portion 3 is completed.

[0069] As shown in Figure 1 Any first slide 4 can slide on the base plate 1 to approach the other two first slides 4 until reaching the positioning position or move away from the other two first slides 4.

[0070] In the technical scheme that the three first positioning parts are fixed on the base plate 1, when the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are respectively installed on the three first positioning parts, the gears on the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 will interfere with each other; therefore, when the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are installed on the three first positioning parts, the operator needs to first complete the power connection between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 (i.e., complete the meshing between the gears in the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8), so that the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 form a whole power transmission unit, and then the whole power transmission unit is installed on the three first positioning parts, so that the first positioning parts respectively support the bottom end of the input shaft assembly 6, the bottom end of the intermediate shaft assembly 7 and the bottom end of the output shaft assembly 8, to complete the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the base plate 1.

[0071] By setting the three first positioning parts as the first slides 4, the three first slides 4 can move away from each other, so that when the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are respectively installed on the three first slides 4, the gears on the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 will not interfere with each other; after the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are respectively installed on the three first slides 4, the three first slides 4 can be moved close to each other until each first slide 4 reaches the position for positioning the input shaft assembly 6, the intermediate shaft assembly 7 or the output shaft assembly 8, to complete the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the base plate 1, and also complete the power connection between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 (i.e., complete the meshing between the gears in the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8); the power connection between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 does not need to be manually completed, which improves the power connection precision between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8, simplifies the assembly process of the reduction box and saves the working hours.

[0072] And in the process of the turnover mechanism driving installation part 3 turning 180 degrees from the initial position, since the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are all clamped between the corresponding first sliding platform 4 and the first side shell 5, and the assembly between the first side shell 5 and the top end of the input shaft assembly 6, the top end of the intermediate shaft assembly 7 and the top end of the output shaft assembly 8 positioned on the bottom plate 1 has been completed, when turning over, each first sliding platform 4 generally does not slip, and the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are offset.

[0073] Further, as shown in Figures 1 to 3 , the assembly device of the reduction gearbox further comprises a locking mechanism 9, and one locking mechanism 9 is correspondingly arranged on each first sliding platform 4, and the locking mechanism 9 is used to lock the position of the first sliding platform 4 on the bottom plate 1 when the corresponding first sliding platform 4 reaches the positioning position.

[0074] By arranging the locking mechanism 9, when each first sliding platform 4 reaches the positioning position (i.e. each first sliding platform 4 reaches the position of the input shaft assembly 6, the intermediate shaft assembly 7 or the output shaft assembly 8), the position of the first sliding platform 4 on the bottom plate 1 can be locked, which can further avoid the first sliding platform 4 slipping and the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 being offset during the process of the turnover mechanism driving installation part 3 turning 180 degrees from the initial position.

[0075] Specifically, as shown in Figure 3 and Figure 4 , three first sliding grooves 1.1 are formed on the bottom plate 1, and one first sliding platform 4 is correspondingly and slidingly matched in each first sliding groove 1.1, so that any first sliding platform 4 can slide on the bottom plate 1 along the extension direction of the corresponding first sliding groove 1.1 to approach the other two first sliding platforms 4 until reaching the positioning position, or to move away from the other two first sliding platforms 4;

[0076] One first sliding rod 14 is correspondingly arranged in each first sliding groove 1.1, and the first sliding rod 14 is arranged along the extension direction of the corresponding first sliding groove 1.1, the first end of each first sliding rod 14 is fixedly connected with the first sliding platform 4 in the corresponding first sliding groove 1.1, and the second end of each first sliding rod 14 penetrates through the end face of the corresponding first sliding groove 1.1 and then penetrates out to the outer circumferential surface of the bottom plate 1; so that the operator can drive the first sliding platform 4 fixedly connected with the first sliding rod 14 to slide on the bottom plate 1 along the extension direction of the corresponding first sliding groove 1.1 by pushing and pulling the second end of the first sliding rod 14;

[0077] Specifically, as shown in Figure 4 , in this embodiment, the locking mechanism 9 is arranged on the first sliding platform 4 through the first sliding rod 14, and one locking mechanism 9 is arranged on the second end of each first sliding rod 14.

[0078] The locking mechanism 9 comprises a rotating part 9.1 sleeved on the second end of the first slide rod 14 and a positioning rod 9.2 fixedly connected to the outer circumferential surface of the rotating part 9.1, the rotating part 9.1 is in a hollow cylindrical shape, the inner hole of the rotating part 9.1 is used to rotate with the outer circumferential surface of the second end of the first slide rod 14, so that the rotating part 9.1 can rotate around the central axis of the first slide rod 14 on which the rotating part 9.1 is sleeved; one end of the positioning rod 9.2 is fixedly connected to the outer circumferential surface of the rotating part 9.1, and the positioning rod 9.2 is arranged along the radial direction of the rotating part 9.1.

[0079] A cylindrical limiting block 1.3 is arranged on the outer circumferential surface of the bottom plate 1, one end of the limiting block 1.3 is fixedly connected to the outer circumferential surface of the bottom plate 1, the number of limiting blocks 1.3 is the same as the number of locking mechanisms 9, one limiting block 1.3 is arranged on one side of each locking mechanism 9, and a first limiting groove 1.3.1 is formed in the outer circumferential surface of the limiting block 1.3 in the circumferential direction of the limiting block 1.3; an operator drives the first slide table 4 fixedly connected to the first slide rod 14 to slide on the bottom plate 1 along the extension direction of the corresponding first slide groove 1.1 by pushing and pulling the second end of the first slide rod 14, until the first slide table 4 reaches the positioning position, the rotating part 9.1 sleeved on the second end of the first slide rod 14 is rotated, the positioning rod 9.2 on the rotating part 9.1 is clamped into the first limiting groove 1.3.1 of the corresponding limiting block 1.3, and the position of the first slide table 4 on the bottom plate 1 can be locked.

[0080] Further, as shown in Figure 1 and Figure 2 , the assembly device of the reduction box further comprises a second positioning part 10 and a second slide table 11 arranged on the bottom plate 1;

[0081] The second positioning part 10 is used to support the bottom end of the shifter shaft of the shifter assembly 12 of the reduction box, and position the shifter assembly 12;

[0082] The second slide table 11 is used to support the shift drum assembly 13 of the reduction box, and the second slide table 11 can move in the horizontal direction to approach the second positioning part 10 and the three first positioning parts, and is locked after reaching the first preset position to position the shift drum assembly 13, or move away from the second positioning part 10 and the three first positioning parts.

[0083] By setting the second positioning part 10 and the second sliding table 11, the fork of the fork assembly 12 can be assembled with the synchronizer 6.1 on the input shaft assembly 6 or the intermediate shaft assembly 7 in advance, and then the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1 is completed, at the same time, the second positioning part 10 supports the bottom end of the fork shaft of the fork assembly 12 to complete the positioning of the fork assembly 12 on the bottom plate 1; then the second sliding table 11 is slid away from the second positioning part 10 and the three first positioning parts, the gear shift drum assembly 13 is installed on the second sliding table 11, and then the second sliding table 11 is slid to approach the second positioning part 10 and the three first positioning parts until it reaches the first preset position and is locked, so as to complete the positioning of the gear shift drum assembly 13 on the bottom plate 1 and the connection between the gear shift drum assembly 13 and the fork assembly 12 (specifically, the connecting rod of the fork assembly 12 is inserted into the ring groove of the gear shift drum assembly 13); compared with the technical solution of directly positioning the gear shift drum assembly 13 on the bottom plate 1, the problem that the connecting rod of the fork assembly 12 cannot be inserted into the ring groove of the gear shift drum assembly 13 can be avoided.

[0084] Specifically, in the embodiment, as shown in Figure 3 , a second sliding groove 1.2 is formed in the bottom plate 1, and a second sliding table 11 is slidably connected in the second sliding groove 1.2, so that the second sliding table 11 can move in the horizontal direction (i.e., move along the extension direction of the second sliding groove 1.2) to approach the second positioning part 10 and the three first positioning parts (i.e., the three first sliding tables 4) until it reaches the first preset position and is locked to position the gear shift drum assembly 13, or move away from the second positioning part 10 and the three first positioning parts (i.e., the three first sliding tables 4).

[0085] A second sliding rod 15 is arranged in the second sliding groove 1.2, the second sliding rod 15 is arranged along the extension direction of the second sliding groove 1.2, one end of the second sliding table 11 is fixedly connected with the second sliding rod 15, and the other end of the second sliding rod 15 penetrates through the end face of the second sliding groove 1.2 and then penetrates out of the outer circumferential surface of the bottom plate 1; so that the operating personnel can drive the second sliding table 11 fixedly connected with the second sliding rod 15 to slide on the bottom plate 1 along the extension direction of the second sliding groove 1.2 by pushing and pulling the end of the second sliding rod 15 that penetrates out of the outer circumferential surface of the bottom plate 1;

[0086] Specifically, as shown in Figure 4 , in the embodiment, a locking mechanism 9 is also arranged on the end of the second sliding rod 15 that penetrates out of the outer circumferential surface of the bottom plate 1;

[0087] Each locking mechanism 9 is arranged on the first sliding table 4 through a first sliding rod 14, or arranged on the second sliding table 11 through a second sliding rod 15, and one locking mechanism 9 is arranged on the second end of each first sliding rod 14, and one locking mechanism 9 is arranged on the end of the second sliding rod 15 which penetrates out of the outer circumferential surface of the bottom plate 1.

[0088] The arrangement of the locking mechanism 9 on the second end of the first sliding rod 14 is the same as the arrangement of the locking mechanism 9 on the end of the second sliding rod 15 which penetrates out of the outer circumferential surface of the bottom plate 1.

[0089] The number of the limiting blocks 1.3 is the same as the number of the locking mechanisms 9, and one limiting block 1.3 is arranged on one side of each locking mechanism 9, and a first limiting groove 1.3.1 is formed on the outer circumferential surface of the limiting block 1.3 along the circumferential direction thereof; the operator drives the second sliding table 11 fixedly connected with the second sliding rod 15 to slide on the bottom plate 1 along the extending direction of the second sliding groove 1.2 by pushing and pulling the end of the second sliding rod 15 which penetrates out of the outer circumferential surface of the bottom plate 1, until the second sliding table 11 reaches the first preset position, then rotates the rotating part 9.1 sleeved on the end of the second sliding rod 15 which penetrates out of the outer circumferential surface of the bottom plate 1, and inserts the positioning rod 9.2 on the rotating part 9.1 into the first limiting groove 1.3.1 of the corresponding limiting block 1.3, so as to lock the second sliding table 11 at the first preset position, and complete the positioning of the gear shift drum assembly 13 on the bottom plate 1.

[0090] As shown in Figure 1 and Figure 6 , the second positioning part 10 is a telescopic positioning rod, and the telescopic positioning rod is arranged vertically on the bottom plate 1, and the end of the telescopic positioning rod away from the bottom plate 1 can be extended to the second preset position and fixed to support the positioning fork shaft.

[0091] By arranging the second positioning part 10 as a telescopic positioning rod, after completing the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1, the end of the telescopic positioning rod away from the bottom plate 1 is retracted first, then the fork of the fork assembly 12 is assembled with the synchronizer 6.1 on the input shaft assembly 6 or the intermediate shaft assembly 7, and then the end of the telescopic positioning rod away from the bottom plate 1 can be extended to the second preset position and fixed to support the positioning fork shaft, so as to complete the positioning of the fork assembly 12 on the bottom plate 1, without the need to pre-assemble the fork of the fork assembly 12 with the synchronizer 6.1 on the input shaft assembly 6 or the intermediate shaft assembly 7, and then complete the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1, which facilitates the installation and positioning of the fork assembly 12.

[0092] Specifically, in the embodiment, as shown in Figure 1 and Figure 6As shown, the second positioning part 10 is a telescopic positioning rod, comprising a third slide rod 10.1 and a positioning seat 10.2, the bottom plate 1 is provided with a mounting hole, the positioning seat 10.2 is in a cylindrical shape, the positioning seat 10.2 is used for being fixedly connected with the bottom plate 1 after penetrating through the mounting hole on the bottom plate 1, a center hole is formed on the positioning seat 10.2 along the axial direction of the positioning seat 10.2, and the third slide rod 10.1 is sleeved in the center hole of the positioning seat 10.2; a limiting column 10.1.1 is fixedly connected to the outer circumferential surface of the third slide rod 10.1, an L-shaped second limiting groove 10.2.1 is formed on the outer circumferential surface of the positioning seat 10.2, the second limiting groove 10.2.1 is communicated to the inner circumferential surface of the center hole of the positioning seat 10.2, and the limiting column 10.1.1 is installed in the second limiting groove 10.2.1; the limiting of the limiting column 10.1.1 by the second limiting groove 10.2.1 enables the end of the third slide rod 10.1 away from the bottom plate 1 to be extended to a second preset position and be fixed, so as to support the positioning fork shaft or be retracted from the second preset position after being released.

[0093] According to the assembling device of the speed reducer provided by the embodiment, the application further provides an assembling method of the speed reducer, and the assembling method comprises the following steps:

[0094] Step 1: adjusting the mounting part 3 to an initial position;

[0095] Step 2: after the positioning between the bottom plate 1 and the mounting part 3 is completed by the positioning and locking mechanism 2, locking and fixing the bottom plate 1 on the mounting part 3;

[0096] Step 3: positioning the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 of the speed reducer on the bottom plate 1 by the three first positioning parts on the bottom plate 1;

[0097] Step 4: mounting the opening of the first side shell 5 of the speed reducer on the mounting part 3 downwards, and completing the assembling between the first side shell 5 and the top ends of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 positioned on the bottom plate 1;

[0098] Step 5: after the mounting part 3 is driven by the overturning mechanism to overturn 180 degrees from the initial position, dismounting the bottom plate 1 from the mounting part 3;

[0099] Step 6: after other parts of the speed reducer are mounted into the first side shell 5, mounting the second side shell of the speed reducer on the first side shell 5, and completing the mounting of the speed reducer.

[0100] Further, step 3 comprises the following substeps:

[0101] S301: sliding the three first slide platforms 4 of the three first positioning parts, so that the three first slide platforms 4 are away from each other;

[0102] S302: mounting the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the three first sliding platforms 4 respectively;

[0103] S303: sliding the three first sliding platforms 4 of the three first positioning portions, so that the three first sliding platforms 4 are close to each other; until each first sliding platform 4 reaches the position of the input shaft assembly 6, the intermediate shaft assembly 7 or the output shaft assembly 8, and the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1 is completed.

[0104] Further, step 3 further includes a sub-step S304: locking the positions of the three first sliding platforms 4 on the bottom plate 1 through the locking mechanism 9 on the first sliding platform 4.

[0105] In another technical solution, in step 3, the shift fork assembly 12 of the reduction gearbox is positioned on the bottom plate 1 through the second positioning portion 10 on the bottom plate 1; and the shift drum assembly 13 of the reduction gearbox is positioned on the bottom plate 1 through the second sliding platform 11 on the bottom plate 1.

[0106] Further, the method for positioning the shift fork shaft of the shift fork assembly 12 of the reduction gearbox on the bottom plate 1 through the second positioning portion 10 on the bottom plate 1, and positioning the shift drum assembly 13 of the reduction gearbox on the bottom plate 1 through the second sliding platform 11 on the bottom plate 1 includes the following sub-steps:

[0107] After sliding the second sliding platform 11 away from the second positioning portion 10 and the three first positioning portions, the shift drum assembly 13 is mounted on the second sliding platform 11;

[0108] The telescopic positioning rod of the second positioning portion 10 is retracted;

[0109] The shift fork of the shift fork assembly 12 is installed into the shift fork groove of the synchronizer 6.1 on the input shaft assembly 6 or the intermediate shaft assembly 7;

[0110] The end of the telescopic positioning rod away from the bottom plate 1 is extended to a second preset position and fixed to support the positioning of the shift fork shaft, and the positioning of the shift fork assembly 12 is completed;

[0111] After sliding the second sliding platform 11 to be close to the second positioning portion 10 and the three first positioning portions, the second sliding platform 11 is locked after reaching a first preset position, and the positioning of the shift drum assembly 13 is completed.

[0112] The assembly device and the assembly method of the reduction gearbox provided by the application have at least the following technical effects or advantages:

[0113] 1. By first adjusting the mounting portion 3 to the initial position, completing the positioning between the bottom plate 1 and the mounting portion 3 by using the positioning and locking mechanism 2, and after the positioning is completed, locking and fixing the bottom plate 1 on the mounting portion 3; then by providing three first positioning portions on the bottom plate 1, the three first positioning portions are respectively used to support the bottom end of the input shaft assembly 6 of the reduction box, the bottom end of the intermediate shaft assembly 7, and the bottom end of the output shaft assembly 8 when the mounting portion 3 is in the initial position, so as to position the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1 respectively; then by the cooperation between each positioning pin 3.1 and the different positioning holes on the outer edge connecting surface of the first side shell 5 of the reduction box, the opening of the first side shell 5 is fixed downward on the mounting portion 3, completing the positioning between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 positioned on the bottom plate 1, and the first side shell 5, and completing the assembly between the first side shell 5 and the top end of the input shaft assembly 6, the top end of the intermediate shaft assembly 7 and the top end of the output shaft assembly 8 positioned on the bottom plate 1; realizing the automatic positioning between the first side shell 5, the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8; after completing the assembly between the first side shell 5 and the top end of the input shaft assembly 6, the top end of the intermediate shaft assembly 7 and the top end of the output shaft assembly 8 positioned on the bottom plate 1, the mounting portion 3 can be driven by the turnover mechanism to turn over 180 degrees from the initial position, and then after the bottom plate 1 is disassembled from the mounting portion 3, the second side shell of the reduction box is mounted on the first side shell 5, completing the installation of the shell of the reduction box (the shell of the reduction box is assembled by the first side shell 5 and the second side shell), solving the technical problems that the existing assembly table or turnover trolley and other devices do not have the automatic positioning function for the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 of the reduction box, and when the reduction box is assembled, the workers need to manually position and install the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8, which is complicated to operate, consumes long working hours, and is easy to produce installation errors.

[0114] 2、By setting three first positioning parts as the first sliding table 4, the three first sliding tables 4 can be away from each other, that is, when the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are respectively installed on the three first sliding tables 4, the gears on the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 can be prevented from interfering with each other; after the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are respectively installed on the three first sliding tables 4, the three first sliding tables 4 can be close to each other; until each first sliding table 4 reaches the position of positioning the input shaft assembly 6, the intermediate shaft assembly 7 or the output shaft assembly 8; the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1 is completed; at the same time, the power connection between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 is also completed (that is, the meshing between each gear in the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 is completed); manual power connection between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 is not required, the power connection precision between the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 is improved, the assembly process of the reduction gearbox is simplified, and the working hours are saved.

[0115] 3、By setting the locking mechanism 9, when each first sliding table 4 reaches the positioning position (that is, each first sliding table 4 reaches the position of positioning the input shaft assembly 6, the intermediate shaft assembly 7 or the output shaft assembly 8), the position of the first sliding table 4 on the bottom plate 1 can be locked, that is, the first sliding table 4 can be further prevented from slipping during the process of the turnover mechanism driving part 3 being turned by 180 degrees from the initial position, so that the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 are offset.

[0116] 4、By setting the second positioning part 10 and the second sliding table 11, after the input shaft assembly 6 or the intermediate shaft assembly 7 is assembled with the synchronizer 6.1 of the input shaft assembly 6 or the intermediate shaft assembly 7, the second positioning part 10 supports the bottom end of the shift fork shaft of the shift fork assembly 12 to complete the positioning of the shift fork assembly 12 on the bottom plate 1 when the positioning of the input shaft assembly 6, the intermediate shaft assembly 7 and the output shaft assembly 8 on the bottom plate 1 is completed; after the second sliding table 11 is slid away from the second positioning part 10 and the three first positioning parts, the gear shift drum assembly 13 is installed on the second sliding table 11, and then the second sliding table 11 is slid to be close to the second positioning part 10 and the three first positioning parts until it reaches the first preset position and is locked, so that the positioning of the gear shift drum assembly 13 on the bottom plate 1 is completed at the same time, and the connection between the gear shift drum assembly 13 and the shift fork assembly 12 is completed (specifically, the connecting rod of the shift fork assembly 12 is inserted into the ring groove of the gear shift drum assembly 13); compared with the technical solution of directly positioning the gear shift drum assembly 13 on the bottom plate 1, the problem that the connecting rod of the shift fork assembly 12 cannot be inserted into the ring groove of the gear shift drum assembly 13 can be avoided.

[0117] 5. By also setting a locking mechanism 9 on the second slide bar 15, the second slide table 11 can be locked in the first preset position, and the shift drum assembly 13 can be positioned on the base plate 1. This can further prevent the second slide table 11 from sliding during the process of the flipping mechanism driving the mounting part 3 to flip 180 degrees from the initial position, thus preventing the shift drum assembly 13 from shifting.

[0118] 6. By setting the second positioning part 10 as a telescopic positioning rod, after the input shaft assembly 6, intermediate shaft assembly 7 and output shaft assembly 8 are positioned on the base plate 1, the end of the telescopic positioning rod away from the base plate 1 can be retracted first. Then, the shift fork of the shift fork assembly 12 can be assembled with the synchronizer 6.1 on the input shaft assembly 6 or intermediate shaft assembly 7. After that, the end of the telescopic positioning rod away from the base plate 1 can be extended to the second preset position and fixed to support and position the shift fork shaft, thus completing the positioning of the shift fork assembly 12 on the base plate 1. It is not necessary to assemble the shift fork of the shift fork assembly 12 with the synchronizer 6.1 on the input shaft assembly 6 or intermediate shaft assembly 7 before completing the positioning of the input shaft assembly 6, intermediate shaft assembly 7 and output shaft assembly 8 on the base plate 1, which facilitates the installation and positioning of the shift fork assembly 12.

[0119] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should be considered within the protection scope of the present invention.

Claims

1. An assembly apparatus for a reduction gearbox, characterised in that: The assembly device comprises a bottom plate, a turnover mechanism, a positioning and locking mechanism, and a mounting portion surrounding the outside of the bottom plate; the positioning and locking mechanism is used for positioning between the bottom plate and the mounting portion, and locking and fixing the bottom plate on the mounting portion after positioning is completed; the output end of the turnover mechanism is fixedly connected with the mounting portion, and the turnover mechanism is used for driving the mounting portion to turn over by 180 degrees; Three first positioning portions are arranged on the bottom plate, and the three first positioning portions are respectively used for supporting the bottom end of an input shaft assembly, the bottom end of an intermediate shaft assembly, and the bottom end of an output shaft assembly of the reduction gearbox when the mounting portion is in an initial position, so as to position the input shaft assembly, the intermediate shaft assembly, and the output shaft assembly on the bottom plate respectively; A plurality of positioning pins are arranged on the mounting portion, and each positioning pin is used for being detachably fixedly connected with a first side shell of the reduction gearbox after penetrating through different positioning holes on the outer edge connecting surface of the first side shell; when the mounting portion is in the initial position, the opening of the first side shell is fixed downward on the mounting portion, and the assembly between the first side shell and the top end of the input shaft assembly, the top end of the intermediate shaft assembly, and the top end of the output shaft assembly positioned on the bottom plate is completed; after the assembly between the first side shell and the top end of the input shaft assembly, the top end of the intermediate shaft assembly, and the top end of the output shaft assembly is completed, the bottom plate is detached from the mounting portion, other parts of the reduction gearbox are installed into the first side shell, a second side shell of the reduction gearbox is installed onto the first side shell, and the installation of the reduction gearbox is completed.

2. An assembly device for a reduction gearbox according to claim 1, characterized in that: The first positioning portion is a first sliding table, and any first sliding table can slide on the bottom plate to approach the other two first sliding tables until reaching the positioning position or to move away from the other two first sliding tables.

3. An assembly device for a reduction gearbox according to claim 2, characterised in that: A locking mechanism is arranged on each first sliding table, and the locking mechanism is used for locking the position of the corresponding first sliding table on the bottom plate when the corresponding first sliding table reaches the positioning position.

4. An assembly device for a reduction gearbox according to claim 1, characterized in that: A second positioning portion and a second sliding table are arranged on the bottom plate; The second positioning portion is used for supporting the bottom end of a shift fork shaft of a shift fork assembly of the reduction gearbox and positioning the shift fork assembly; The second sliding table is used for supporting a shift drum assembly of the reduction gearbox, and the second sliding table can move along the horizontal direction to approach the second positioning portion and the three first positioning portions until reaching a first preset position and being locked to position the shift drum assembly or to move away from the second positioning portion and the three first positioning portions.

5. An assembly device for a reduction gearbox according to claim 4, characterised in that: The second positioning portion is a telescopic positioning rod, the telescopic positioning rod is vertically arranged on the bottom plate, and one end of the telescopic positioning rod away from the bottom plate can be extended to a second preset position and fixed to support and position the shift fork shaft.

6. A method of assembling a reduction gearbox, characterised in that: The assembly method is implemented by using the assembly device of the reduction gearbox according to any one of claims 1-5, and the assembly method comprises the following steps: Step 1: Adjust the mounting part to the initial position; Step 2: After positioning the bottom plate and the mounting part through the positioning locking mechanism, lock and fix the bottom plate on the mounting part; Step 3: Position the input shaft assembly, intermediate shaft assembly and output shaft assembly of the reduction gearbox on the bottom plate through the three first positioning parts on the bottom plate; Step 4: Install the opening of the first side housing of the reduction gearbox on the mounting part with the opening facing down, complete the assembly of the first side housing and the top end of the input shaft assembly, the top end of the intermediate shaft assembly and the top end of the output shaft assembly positioned on the bottom plate; Step 5: After driving the mounting part to flip 180 degrees from the initial position through the flipping mechanism, disassemble the bottom plate from the mounting part; Step 6: After installing other parts of the reduction gearbox into the first side housing, install the second side housing of the reduction gearbox on the first side housing, complete the installation of the reduction gearbox.

7. A method of assembling a reduction gearbox according to claim 6, characterised in that: The step 3 includes the following sub-steps: S301: Slide the three first sliding platforms of the three first positioning parts, and make the three first sliding platforms away from each other; S302: Install the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the three first sliding platforms respectively; S303: Slide the three first sliding platforms of the three first positioning parts, and make the three first sliding platforms close to each other; until each first sliding platform reaches the position for positioning the input shaft assembly, the intermediate shaft assembly or the output shaft assembly; complete the positioning of the input shaft assembly, the intermediate shaft assembly and the output shaft assembly on the bottom plate.

8. A method of assembling a reduction gearbox according to claim 7, characterised in that: The step 3 also includes the sub-step S304: lock the position of the three first sliding platforms on the bottom plate through the locking mechanism on the first sliding platform.

9. The method of assembling a reduction gearbox of claim 6, wherein: In the step 3, the shift drum assembly of the reduction gearbox is also positioned on the bottom plate through the second positioning part on the bottom plate, and the gear shift drum assembly of the reduction gearbox is positioned on the bottom plate through the second sliding platform on the bottom plate.

10. A method of assembling a reduction gearbox according to claim 9, characterised in that: The method for positioning the shift drum shaft of the shift drum assembly of the reduction gearbox on the bottom plate through the second positioning part on the bottom plate, and positioning the gear shift drum assembly of the reduction gearbox on the bottom plate through the second sliding platform on the bottom plate includes the following sub-steps: After sliding the second sliding platform away from the second positioning part and the three first positioning parts, install the gear shift drum assembly on the second sliding platform; Retract the telescopic positioning rod of the second positioning part; Put the shift drum of the shift drum assembly into the shift drum groove of the synchronizer on the input shaft assembly or the intermediate shaft assembly; Extend the end of the telescopic positioning rod away from the bottom plate to the second preset position and fix it to support and position the shift drum shaft, complete the positioning of the shift drum assembly; Slide the second sliding platform to make it close to the second positioning part and the three first positioning parts, and lock it after the second sliding platform reaches the first preset position, complete the positioning of the gear shift drum assembly.

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