Shaft system assembling mechanism capable of automatically meshing shaft teeth

Abstract

The invention belongs to the technical field of assembly equipment, and discloses a shaft system assembly mechanism capable of automatically meshing shaft teeth, which comprises a workbench, an intermediate shaft body, a differential mechanism body and an input shaft body, a clamping assembly is arranged on the workbench, the clamping assembly comprises a mounting base fixed to the lower end face of the workbench, and an electric clamping jaw rotationally connected is arranged at the upper end of the mounting base and used for clamping and fixing the lower end of an intermediate shaft body vertically placed on the workbench; a rotary driving assembly is arranged on the workbench and used for driving the intermediate shaft body to rotate. A pair of horizontally-arranged sliding table assemblies are arranged on the upper end face of the workbench and located on the two sides of the central axis of the intermediate shaft body correspondingly. The purpose of conveniently completing meshing assembly of the differential mechanism body, the input shaft body and the intermediate shaft body is achieved, excessive collision in the meshing assembly process can be avoided, and damage to shaft teeth on the differential mechanism body, the input shaft body and the intermediate shaft body is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of assembly equipment, and in particular relates to a shaft system assembly mechanism for automatically meshing shaft gears. Background Art

[0002] With the continuous development of science and technology, and with the technological progress in the field of automobile industry assembly technology, the requirements for the automation rate in the field of three-in-one electric drive assembly line technology are becoming higher and higher. The realization of fully automatic assembly of gear shafts has become a basic requirement of the current assembly line. The existing three-in-one electric drive assembly equipment usually needs to assemble and connect the differential, the intermediate shaft and the input shaft. The intermediate shaft is used to connect the differential and the input shaft. During assembly, it is usually necessary to first fix and clamp the intermediate shaft, and then push the differential and the input shaft close to the intermediate shaft. However, there is a common problem in the existing three-in-one electric drive assembly equipment when assembling the differential, the intermediate shaft and the input shaft: during the assembly process, when the differential or the input shaft contacts the intermediate shaft, the tops of the shaft teeth may conflict with each other, resulting in the inability to push the differential or the input shaft into place; if the push continues, it may cause excessive collision, damage the shaft teeth, and eventually cause damage to the shaft teeth; therefore, in the prior art, there is a problem that excessive collision is easily caused during the assembly process, thereby causing damage to the shaft teeth. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a shaft system assembly mechanism for automatically meshing shaft teeth, which solves the problem in the prior art that excessive bumps and collisions are easily caused during the assembly process, thereby causing damage to the shaft teeth.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A shaft system assembly mechanism for automatically meshing shaft gears, comprising a workbench, an intermediate shaft body, a differential body and an input shaft body;

[0006] The workbench is provided with a clamping assembly, which includes a mounting seat fixed to the lower end surface of the workbench, and an electric clamping claw rotatably connected is provided on the upper end of the mounting seat, and the electric clamping claw is used to clamp and fix the lower end of the intermediate shaft body vertically placed on the workbench;

[0007] A rotary drive assembly is provided on the workbench, and the rotary drive assembly is used to drive the intermediate shaft body to rotate;

[0008] A pair of horizontally placed slide assemblies are arranged on the upper end surface of the workbench. The two slide assemblies are respectively located on both sides of the central axis of the intermediate shaft body. The slide assemblies are both provided with coaxially placed buffer assemblies.

[0009] A differential positioning seat is connected to any buffer assembly, and the differential body is placed vertically and detachably connected to the differential positioning seat;

[0010] The other buffer component is connected to an input shaft positioning seat, and the input shaft body is vertically placed and detachably connected to the input shaft positioning seat;

[0011] After the differential body or the input shaft body is in contact, if the slide assembly continues to push the buffer assembly close to the intermediate shaft, the buffer assembly can elastically contract along the driving direction of the slide assembly;

[0012] The slide assembly includes a base plate fixed on the workbench, a pair of first guide rails placed in parallel are fixed on the base plate, the first guide rails are placed horizontally, a first slide plate is arranged directly above the two first guide rails, a pair of first sliders are fixed at the lower end of the first slide plate, the two first sliders are respectively slidably connected to the two first guide rails, and the buffer assembly is arranged on the first slide plate;

[0013] The buffer components all include a second guide rail fixed on the first slide plate, the second guide rails are coaxially arranged with the first guide rails in the corresponding slide assembly, a second slide block is slidably arranged on the second guide rails, a second slide block is fixed to the upper end of the second slide block, a fixing plate is arranged at the end of the second guide rail away from the intermediate shaft body, a connecting block is fixed to the end of the second slide block close to the fixing plate, a spring coaxially arranged with the second guide rail is arranged between the connecting block and the fixing plate, one end of the spring is fixed to the connecting block, the other end of the spring is fixedly connected to a pressure sensor, and the pressure sensor is fixedly mounted on the fixing plate;

[0014] A differential positioning seat is fixed on the second slide plate of any buffer assembly, and an input shaft positioning seat is fixed on the second slide plate of the other buffer assembly;

[0015] The slide assembly also includes a mounting plate fixed on the workbench, a first rotating motor is fixed on the mounting plate, a horizontally placed screw is connected to the output end of the first rotating motor, a third slider connected by a thread is sleeved on the screw, one end of the third slider is fixed to the first slider, and a bearing seat is rotatably connected to the end of the screw away from the first rotating motor, and the bearing seat is fixed to the workbench;

[0016] A round through hole is provided on the workbench for the lower end of the intermediate shaft body to pass through;

[0017] The rotary drive assembly includes a support cylinder placed coaxially with the circular through hole, the support cylinder is fixed on the upper end surface of the workbench, the upper and lower ends of the support cylinder are open and are used for the lower end of the intermediate shaft body to pass through, the upper end of the support cylinder is rotatably clamped with a first gear placed coaxially, the lower end of the intermediate shaft body passes through the first gear and is slidably clamped with the first gear, a second rotary motor is fixedly installed on the lower end surface of the workbench, a rotating shaft is provided at the output end of the second rotary motor, the rotating shaft passes through the workbench and is rotatably connected to the workbench, a second gear is fixedly sleeved on the upper end of the rotating shaft, and an annular synchronous belt is sleeved between the first gear and the second gear;

[0018] The workbench is provided with a differential engagement position sensor and an input shaft engagement position sensor;

[0019] When the differential body moves to the meshing position state with the intermediate shaft, the differential meshing position sensor sends out a warning signal;

[0020] When the input shaft body moves to a meshing position state with the intermediate shaft, the input shaft meshing position sensor sends out a warning signal.

[0021] Beneficial effects of the present invention:

[0022] The present invention can improve the guidance and stability of the buffer assembly during movement by coordinating the first guide rail, the first slider and the first slide plate, and can improve the accuracy and stability of the meshing assembly of the differential body or the input shaft body and the intermediate shaft body;

[0023] Through the coordinated arrangement of the second guide rail, the second slider, the third slider, the fixed plate, the connecting block, the spring and the pressure sensor in the buffer assembly, if the differential body or the input shaft body contacts the intermediate shaft body with tooth tops facing each other, the slide assembly will continue to push the buffer assembly close to the intermediate shaft body, but at this time the differential body or the input shaft body and the intermediate shaft body are pressed against each other, and the differential body or the input shaft body cannot continue to approach the intermediate shaft body. At this time, the spring is squeezed and compressed to avoid excessive collision between the differential body or the input shaft body and the intermediate shaft body during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the present invention from different viewing angles;

[0027] Figure 3 It is a partial structural schematic diagram of the rotary drive assembly of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the screw rod of the present invention;

[0029] Figure 5 It is a partial structural schematic diagram of the substrate of the present invention;

[0030] Figure 6 It is a partial structural schematic diagram of the second slide plate of the present invention;

[0031] Figure 7 It is a partial structural schematic diagram of the annular synchronous toothed belt of the present invention;

[0032] Figure 8 It is a partial structural schematic diagram of the first gear of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 8 As shown, a shaft system assembly mechanism for automatically meshing shaft gears comprises a workbench 1, an intermediate shaft body 2, a differential body 3 and an input shaft body 4;

[0035] A clamping assembly 5 is provided on the workbench 1. The clamping assembly 5 includes a mounting seat 51 fixed to the lower end surface of the workbench 1. An electric clamping jaw 52 rotatably connected is provided on the upper end of the mounting seat 51. The electric clamping jaw 52 is used to clamp and fix the lower end of the intermediate shaft body 2 vertically placed on the workbench 1.

[0036] A rotary drive assembly 6 is provided on the workbench 1, and the rotary drive assembly 6 is used to drive the intermediate shaft body 2 to rotate;

[0037] A pair of horizontally placed slide assemblies 7 are provided on the upper end surface of the workbench 1. The two slide assemblies 7 are respectively located on both sides of the central axis of the intermediate shaft body 2. The slide assemblies 7 are both provided with coaxially placed buffer assemblies 8.

[0038] A differential positioning seat 31 is connected to any buffer assembly 8, and the differential body 3 is vertically placed and detachably connected to the differential positioning seat 31;

[0039] The other buffer assembly 8 is connected to an input shaft positioning seat 41, and the input shaft body 4 is vertically placed and detachably connected to the input shaft positioning seat 41;

[0040] After the differential body 3 or the input shaft body 4 is in contact, if the slide assembly 7 continues to push the buffer assembly 8 toward the intermediate shaft, the buffer assembly 8 can elastically contract along the driving direction of the slide assembly 7;

[0041] The present application is used in conjunction with a mechanical arm in the prior art, and the differential body 3 and the input shaft body 4 are placed on the corresponding differential positioning seat 31 and the input shaft positioning seat 41 in sequence through the mechanical arm, and the intermediate shaft body 2 is vertically placed on the electric clamp 52. Preferably, the electric clamp 52 in the present application can be a three-jaw clamp, which is clamped and fixed by expanding the inner hole of the intermediate shaft body 2;

[0042] In the present application, two slide assemblies 7 can be opened at the same time to drive the corresponding buffer assembly 8 close to the intermediate shaft body 2, so that the differential body 3 and the input shaft body 4 are assembled with the intermediate shaft body 2 at the same time; or any buffer assembly 8 can be selectively opened first, so that the differential body 3 and the input shaft body 4 are assembled one by one;

[0043] The present embodiment is described below by taking the differential body 3 and the intermediate shaft body 2 for example:

[0044] Step 1: First, turn on the rotary drive assembly 6 to drive the intermediate shaft body 2 to rotate;

[0045] Step 2: Then the buffer assembly 8, the differential positioning seat 31 and the differential body 3 are driven to approach the intermediate shaft through the slide assembly 7;

[0046] Step 3: When the differential body 3 contacts the intermediate shaft body 2, if the two are just meshed, the assembly is completed; if any tooth top on the differential body 3 collides with any tooth top on the intermediate shaft, it indicates that the two are not successfully meshed. At this time, the slide assembly 7 continues to drive the buffer assembly 8 and the differential body 3 to approach the intermediate shaft body 2. However, the intermediate shaft body 2 and the differential body 3 have already reached the column. When the slide assembly 7 drives the buffer assembly 8 to approach the intermediate shaft body 2, the buffer assembly 8 is squeezed and compressed to avoid excessive collision between the differential body 3 and the intermediate shaft body 2 and cause damage;

[0047] When the buffer assembly 8 is squeezed and contracted, the slide assembly 7 synchronously drives the buffer assembly 8 to move a certain distance away from the intermediate shaft body 2 until the differential body 3 is separated from the intermediate shaft body 2;

[0048] Step 4: Drive the buffer assembly 8 and the differential to approach the intermediate shaft body 2 through the slide assembly 7 again to re-identify the gears;

[0049] Step 5: Repeat steps 3 and 4 until the differential body 3 and the intermediate shaft body 2 are completely meshed and assembled;

[0050] The tooth engagement assembly process of the input shaft body 4 is the same as that of the differential body 3;

[0051] Through the above process, the meshing assembly between the differential body 3, the input shaft body 4 and the intermediate shaft body 2 can be completed, and excessive collision during the meshing assembly process can be avoided, thereby reducing damage to the shaft teeth on the differential body 3, the input shaft body 4 and the intermediate shaft body 2.

[0052] The slide assembly 7 includes a base plate 71 fixed on the workbench 1, a pair of first guide rails 72 placed in parallel are fixed on the base plate 71, the first guide rails 72 are placed horizontally, a first slide plate 73 is provided directly above the two first guide rails 72, a pair of first sliders 74 are fixed at the lower end of the first slider 73, the two first sliders 74 are respectively slidably connected to the two first guide rails 72, and the buffer assembly 8 is arranged on the first slider 73; through the coordinated arrangement of the first guide rails 72, the first slider 74 and the first slider 73, the guiding property and stability of the buffer assembly 8 during the movement process can be improved, and the accuracy and stability of the meshing assembly of the differential body 3 or the input shaft body 4 and the intermediate shaft body 2 can be improved.

[0053] The buffer components 8 all include a second guide rail 81 fixed on the first slide plate 73, the second guide rail 81 is coaxially placed with the first guide rail 72 in the corresponding slide assembly 7, a second slider 82 is slidably close to the second guide rail 81, a second slide plate 83 is fixed to the upper end of the second slider 82, a fixing plate 84 is provided at the end of the second guide rail 81 away from the intermediate shaft body 2, a connecting block 85 is fixed at the end of the second slide plate 83 close to the fixing plate 84, a spring 86 coaxially placed with the second guide rail 81 is provided between the connecting block 85 and the fixing plate 84, one end of the spring 86 is fixed to the connecting block 85, and the other end of the spring 86 is fixedly connected to a pressure sensor 87, and the pressure sensor 87 is fixedly mounted on the fixing plate 84;

[0054] A differential positioning seat 31 is fixed on the second slide plate 83 of any buffer assembly 8, and an input shaft positioning seat 41 is fixed on the second slide plate 83 of another buffer assembly 8;

[0055] The working process of the buffer component 8 in the present application is described by taking the assembly of the differential body 3 as an example. When the slide assembly 7 drives the buffer component 8, the differential positioning seat 31 and the differential body 3 to approach the intermediate shaft body 2, if the tooth tops are against the tooth tops when the differential body 3 contacts the intermediate shaft body 2, the slide assembly 7 will continue to push the buffer component 8 to approach the intermediate shaft body 2, but at this time the differential body 3 and the intermediate shaft body 2 are pressed against each other, and the differential body 3 cannot continue to approach the intermediate shaft body 2. At this time, the differential body 3 squeezes and compresses the spring 86 through the differential positioning seat 31, the second slide plate 83, the connecting block 85 and the spring 86; through the above process, excessive collision between the differential body 3 or the input shaft body 4 and the intermediate shaft body 2 is avoided during installation.

[0056] In order to facilitate automatic control of the first slide plate 73 away from or close to the intermediate shaft body 2, the slide assembly 7 also includes a mounting plate 75 fixed on the workbench 1, and a first rotating motor 76 is fixed on the mounting plate 75. The output end of the first rotating motor 76 is connected to a horizontally placed screw rod 77, and a third slider 78 connected by thread is sleeved on the screw rod 77. One end of the third slider 78 is fixed to the first slide plate 73, and the end of the screw rod 77 away from the first rotating motor 76 is rotatably connected to a bearing seat 79, and the bearing seat 79 is fixed to the workbench 1; due to the directional limitation of the first slide plate 73 by the first guide rail 72 and the first slider 74, when the first rotating motor 76 is turned on, the screw rod 77 drives the third slider 78 to perform thread transmission, and the third slider 78 drives the first slider 74 to move. By controlling the rotation direction of the screw rod 77 driven by the first rotating motor 76, the first slide plate 73 can be controlled to move away from or close to the intermediate shaft body;

[0057] In the present application, the cooperation of a roller screw and a screw connecting plate may also be selected to replace the cooperation of the screw 77 and the third sliding block 78 .

[0058] Preferably, the first rotary motor 76 and the screw rod 77 are connected via a coupling.

[0059] In order to facilitate driving the intermediate shaft body 2 to rotate, a round through hole for the lower end of the intermediate shaft body 2 to pass through is opened on the workbench 1, so that the lower end of the intermediate shaft body 2 can pass through the workbench 1 and be fixed to the electric clamp 52.

[0060] The rotary drive assembly 6 includes a support cylinder 61 placed coaxially with the circular through hole, the support cylinder 61 is fixed on the upper end surface of the workbench 1, the upper and lower ends of the support cylinder 61 are open and are used for the lower end of the intermediate shaft body 2 to pass through, the upper end of the support cylinder 61 is rotatably clamped with a first gear 62 placed coaxially, the lower end of the intermediate shaft body 2 passes through the first gear 62 and is slidably clamped with the first gear 62, a second rotating motor 63 is fixedly installed on the lower end surface of the workbench 1, the output end of the second rotating motor 63 is provided with a rotating shaft, the rotating shaft passes through the workbench 1 and is rotatably connected to the workbench 1, the upper end of the rotating shaft is fixedly sleeved with a second gear 64, and a ring-shaped synchronous toothed belt 65 is sleeved between the first gear 62 and the second gear 64; turning on the second rotating motor 63 can drive the rotating shaft, the second gear 64, the ring-shaped synchronous toothed belt 65 and the first gear 62 in sequence, and drive the intermediate shaft body 2 to rotate through the first gear 62.

[0061] Preferably, a through hole is opened on the second gear 64 for the lower end of the intermediate shaft body 2 to pass through, and a card groove is arranged on the peripheral wall of the through hole, and a protrusion adapted to the card groove is arranged on the peripheral wall of the lower end of the intermediate shaft body 2. When the lower end of the intermediate shaft body 2 passes through, the protrusion is engaged with the card groove. At this time, when the first gear 62 rotates, it can synchronously drive the intermediate shaft body 2 to rotate, and after the assembly is completed, it is convenient to disassemble and separate the intermediate shaft body 2 and the first gear 62.

[0062] Preferably, a reducer is provided between the second gear 64 and the rotating shaft, and the output end of the reducer is connected to the rotating shaft, thereby controlling the intermediate shaft body 2 to rotate uniformly at a suitable lower speed.

[0063] In order to facilitate monitoring of the state of meshing completion, a differential meshing position sensor 92 and an input shaft meshing position sensor 91 are provided on the workbench 1;

[0064] When the differential body 3 moves to the meshing position state with the intermediate shaft, the differential meshing position sensor 92 sends out a warning signal;

[0065] When the input shaft body 4 moves to the meshing position state with the intermediate shaft, the input shaft meshing position sensor 91 sends out a warning signal;

[0066] The engagement result can be detected by using the differential engagement position sensor 92 and the input shaft engagement position sensor 91; preferably, a corresponding signal receiver and processor can be provided on the slide assembly 7, and when a warning signal is received, the corresponding slide assembly 7 is immediately closed.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A shaft system assembly mechanism for automatically meshing shaft gears, comprising a workbench (1), an intermediate shaft body (2), a differential body (3) and an input shaft body (4), characterized in that: A clamping assembly (5) is provided on the workbench (1), the clamping assembly (5) comprising a mounting seat (51) fixed to the lower end surface of the workbench (1), an electric clamping jaw (52) rotatably connected is provided at the upper end of the mounting seat (51), and the electric clamping jaw (52) is used to clamp and fix the lower end of the intermediate shaft body (2) vertically placed on the workbench (1); A rotary drive assembly (6) is provided on the workbench (1), and the rotary drive assembly (6) is used to drive the intermediate shaft body (2) to rotate; A pair of horizontally placed slide assemblies (7) are arranged on the upper end surface of the workbench (1), the two slide assemblies (7) are respectively located on both sides of the central axis of the intermediate shaft body (2), and a coaxially placed buffer assembly (8) is arranged on each of the slide assemblies (7); Any buffer assembly (8) is connected to a differential positioning seat (31), and the differential body (3) is placed vertically and detachably connected to the differential positioning seat (31); Another buffer assembly (8) is connected to an input shaft positioning seat (41), and the input shaft body (4) is vertically placed and detachably connected to the input shaft positioning seat (41); When the differential body (3) or the input shaft body (4) is in contact, if the slide assembly (7) continues to push the buffer assembly (8) close to the intermediate shaft, the buffer assembly (8) can elastically contract along the driving direction of the slide assembly (7).

2. The shaft system assembly mechanism for automatically meshing shaft gears according to claim 1, characterized in that: The slide assembly (7) comprises a base plate (71) fixed on the workbench (1), a pair of first guide rails (72) placed in parallel are fixed on the base plate (71), the first guide rails (72) are placed in a horizontal state, a first slide plate (73) is arranged directly above the two first guide rails (72), a pair of first sliding blocks (74) are fixed at the lower end of the first slide plate (73), the two first sliding blocks (74) are respectively slidably connected to the two first guide rails (72), and the buffer assembly (8) is arranged on the first slide plate (73).

3. The shaft system assembly mechanism for automatically meshing shaft gears according to claim 2, characterized in that: The buffer assembly (8) includes a second guide rail (81) fixed on the first slide plate (73), the second guide rail (81) is coaxially arranged with the first guide rail (72) in the corresponding slide assembly (7), a second slider (82) is slidably arranged on the second guide rail (81), the second slider (83) is fixed to the upper end of the second slider (82), a fixing plate (84) is arranged at the end of the second guide rail (81) away from the intermediate shaft body (2), a connecting block (85) is fixed at the end of the second slider (83) close to the fixing plate (84), a spring (86) coaxially arranged with the second guide rail (81) is arranged between the connecting block (85) and the fixing plate (84), one end of the spring (86) is fixed to the connecting block (85), the other end of the spring (86) is fixedly connected to a pressure sensor (87), and the pressure sensor (87) is fixedly mounted on the fixing plate (84); A differential positioning seat (31) is fixed on the second slide plate (83) of any buffer assembly (8), and an input shaft positioning seat (41) is fixed on the second slide plate (83) of the other buffer assembly (8).

4. The shaft system assembly mechanism for automatically meshing shaft gears according to claim 3, characterized in that: The slide assembly (7) also includes a mounting plate (75) fixed on the workbench (1), a first rotating motor (76) is fixed on the mounting plate (75), the output end of the first rotating motor (76) is connected to a horizontally placed screw rod (77), a third sliding block (78) is sleeved on the screw rod (77) and is threadedly connected, one end of the third sliding block (78) is fixed to the first slide plate (73), and the end of the screw rod (77) away from the first rotating motor (76) is rotatably connected to a bearing seat (79), and the bearing seat (79) is fixed to the workbench (1).

5. The shaft system assembly mechanism for automatically meshing shaft gears according to claim 4, characterized in that: The workbench (1) is provided with a round through hole for the lower end of the intermediate shaft body (2) to pass through.

6. The shaft system assembly mechanism for automatically meshing shaft gears according to claim 5, characterized in that: The rotary drive assembly (6) comprises a support cylinder (61) which is coaxially arranged with the circular through hole. The support cylinder (61) is fixed on the upper end surface of the workbench (1). The upper and lower ends of the support cylinder (61) are both open and are used for the lower end of the intermediate shaft body (2) to pass through. The upper end of the support cylinder (61) is rotatably engaged with a first gear (62) coaxially arranged. The lower end of the intermediate shaft body (2) passes through the first gear (62) and is slidably engaged with the first gear (62). A second rotary motor (63) is fixedly mounted on the lower end surface of the workbench (1). A rotating shaft is provided at the output end of the second rotary motor (63). The rotating shaft passes through the workbench (1) and is rotatably connected to the workbench (1). A second gear (64) is fixedly sleeved on the upper end of the rotating shaft. An annular synchronous toothed belt (65) is sleeved between the first gear (62) and the second gear (64).

7. The shaft system assembly mechanism for automatically meshing shaft gears according to claim 6, characterized in that: A differential engagement position sensor (92) and an input shaft engagement position sensor (91) are arranged on the workbench (1); When the differential body (3) moves to a meshing position state with the intermediate shaft, the differential meshing position sensor (92) sends out a warning signal; When the input shaft body (4) moves to a meshing position state with the intermediate shaft, the input shaft meshing position sensor (91) sends out a warning signal.

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