A tooling fixture for assembling a farm implement transmission case

Abstract

The utility model relates to an agricultural machine transmission case assembly tool clamp and relates to the technical field of assembly clamping tool, including assembly workstation, be equipped with box body positioning clamp, shafting centering tool, bearing press -fit clamp and gear hoisting clamp respectively on assembly workstation, the utility model solves the problem of insufficient adaptability, continuity defects and operation limitation of the tool clamp in the traditional technology when being used for the assembly of agricultural machine transmission case.

Description

Technical Field

[0001] This invention relates to the field of assembly clamping tooling technology, specifically to a tooling fixture for assembling a transmission box of an agricultural tiller. Background Technology

[0002] A farm tractor is a self-propelled power machine used to traction or drive various agricultural implements. Its main functions include: tilling, land preparation, sowing, fertilizing, cultivation, weeding, harvesting, and auxiliary operations such as transportation.

[0003] The gearbox is a key transmission component of agricultural machinery. Its main functions include: changing the output speed and torque according to the operation requirements (speed change function), realizing forward and reverse movement (reversing function), providing rotational power to agricultural implements (power output function), and temporarily cutting off power transmission when shifting gears (power cut-off function).

[0004] The production process of a transmission gearbox is a systematic one, involving multiple stages such as material preparation and design, component processing, assembly, and testing, requiring strict quality control and process management. Specifically, transmission gearbox assembly is the process of assembling multiple transmission components (such as gears, shafts, bearings, and seals) into a complete transmission gearbox according to design requirements. To ensure assembly accuracy, the transmission gearbox body and each transmission component need to be precisely positioned and clamped during assembly; therefore, various tooling fixtures are used in the transmission gearbox assembly process.

[0005] The production of a transmission gearbox is a systematic process encompassing material preparation, design, component machining, assembly, and testing, requiring strict quality and process control. Transmission gearbox assembly is a crucial step, involving the assembly of gears, shafts, bearings, seals, and other components into a complete functional unit according to design requirements. To ensure assembly accuracy, precise positioning and clamping of the gearbox housing and various transmission components are necessary, thus requiring a variety of tooling fixtures.

[0006] However, due to significant differences in the shape and size of transmission components, as well as variations in clamping positions and methods, existing tooling fixtures have the following limitations in the assembly process: 1. Insufficient adaptability: The fixture has a single function and is difficult to adapt to the clamping requirements of different types of transmission components; 2. Continuity defect: The clamping process lacks continuity and cannot achieve automatic switching between multiple workstations; 3. Operational limitations: The fixed clamping method hinders precision operations such as bearing press-fitting, shaft alignment, and gear meshing.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the present invention provides a tooling fixture for assembling the transmission box of an agricultural machine, which solves the problems of insufficient adaptability, continuity defects and operation limitations of the tooling fixtures in the traditional technology when used for assembling the transmission box of an agricultural machine.

[0009] To achieve the above objectives, the present invention provides the following technical solution: A tooling fixture for assembling a transmission box of an agricultural tiller includes an assembly workbench, on which a box positioning fixture, a shaft alignment fixture, a bearing pressing fixture, and a gear lifting fixture are respectively provided.

[0010] As an optimized solution, the box positioning fixture includes a positioning support platform fixedly disposed on one side of the upper surface of the assembly workbench, and a reversing turntable is rotatably disposed in the middle of the upper surface of the positioning support platform.

[0011] As an optimized solution, a lifting platform is provided above the positioning support platform. Four centrally symmetrical connecting vertical plates are fixed to the lower surface of the lifting platform corresponding to the four side end faces of the positioning support platform. Each connecting vertical plate is provided with a side clamping positioning plate that can be extended and retracted.

[0012] As an optimized solution, a lifting clearance opening is provided in the middle of the upper surface of the lifting platform, and two symmetrical sliding mounting openings are provided on both sides of the upper surface of the lifting platform.

[0013] As an optimized solution, the shaft alignment fixture includes two square alignment slides, which are respectively slidably fitted into the two sliding mounting openings.

[0014] As an optimized solution, each of the centering slides is fixedly connected to a rotation limiting frame, and two sets of centering rollers are rotatably mounted on the rotation limiting frame. Each set of centering rollers includes two telescopically connected rotating half-cylinders.

[0015] As an optimized solution, a laser alignment device is provided on both alignment slides. The laser alignment device includes a laser emitter and a laser receiver arranged symmetrically. The laser emitter and the laser receiver are respectively fixed to the middle of the upper surface of the two alignment slides and below the alignment roller.

[0016] As an optimized solution, the gear lifting fixture includes a flip plate that is closely attached to the upper surface of the assembly workbench. Two flip mounting seats are respectively provided on both sides of the end of the flip plate, and the lower end of each flip mounting seat is fixed to the upper surface of the assembly workbench.

[0017] As an optimized solution, a flip drive motor is fixedly connected to the longitudinal outer wall of each of the flip mounting bases, and the output shaft end of the flip drive motor passes through the flip mounting base and is fixedly connected to the side end face of the flip plate.

[0018] As an optimized solution, two symmetrical horizontal telescopic cylinders are fixedly connected to the transverse outer end face of the flip plate. The telescopic ends of the two horizontal telescopic cylinders are fixedly connected to the adapter angle seats. Two symmetrical vertical telescopic cylinders are fixedly connected to the upper surface of the adapter angle seats. The upper telescopic ends of the two vertical telescopic cylinders are fixedly connected to the vertical extension plates.

[0019] As an optimized solution, two symmetrical hoisting positioning plates are fixedly connected to the longitudinal side edges of the extension plate. A positioning telescopic cylinder is fixedly connected to the longitudinal inner wall of each hoisting positioning plate. A laterally extending hoisting clamp is fixedly connected to the telescopic end of the positioning telescopic cylinder. An assembly clearance opening is provided at the end of each hoisting clamp.

[0020] As an optimized solution, the bearing press-fit fixture includes two symmetrically arranged right-angle connecting plates. The lower end of the right-angle connecting plate is fixed to the longitudinal side end face of the assembly workbench. The right-angle connecting plate is positioned opposite the lifting clamping plate. Four centrally symmetrical press-fit telescopic cylinders are fixed to the longitudinal inner wall of each right-angle connecting plate. The telescopic ends of the four press-fit telescopic cylinders are fixed to press-fit side plates, and press-fit grooves are opened on the press-fit side plates.

[0021] As an optimized solution, a loading robotic arm is rotatably provided on the other side of the upper surface of the assembly workbench, and a loading chuck is provided at the upper end of the loading robotic arm.

[0022] As an optimized solution, a steering drive motor is fixedly connected to the center of the lower surface of the positioning support platform, and the end of the output shaft of the steering drive motor passes upward through the positioning support platform and is fixedly connected to the center of the lower surface of the reversing turntable.

[0023] As an optimized solution, the upper surface of the assembly workbench is provided with four centrally symmetrical hydraulic telescopic cylinders corresponding to the lifting platform, and the upper telescopic end of each hydraulic telescopic cylinder is fixed to the lower surface of the lifting platform.

[0024] As an optimized solution, a transmission drive motor is fixedly connected to the longitudinal outer wall of the rotation limit frame, and a main transmission wheel is fixedly connected to the end of the output shaft of the transmission drive motor.

[0025] As an optimized solution, a connecting shaft is fixedly connected to the closed end face of the rotating half-cylinder, and the end of the connecting shaft is rotatably mounted on the longitudinal inner wall of the rotating limiting frame.

[0026] As an optimized solution, a secondary drive wheel is fixedly connected to the outer peripheral wall of each of the connecting shafts, and the secondary drive wheel engages with the main drive wheel for transmission.

[0027] As an optimized solution, the two rotating half-cylinders are fixedly connected by an electrically controlled telescopic cylinder.

[0028] As an optimized solution, two sliding drive motors are fixedly connected to the two sliding mounting ports on the transverse outer wall of the lifting platform, and the output shaft of the sliding drive motor extends into the sliding mounting port and is fixedly connected to a drive threaded rod.

[0029] As an optimized solution, the drive threaded rod passes through and is threadedly connected to the centering slide, and the end of the drive threaded rod is rotatably supported on the transverse inner wall of the sliding mounting port.

[0030] As an optimized solution, each of the sliding mounting openings is further provided with a transverse support beam, the middle part of which passes through the centering slide block, and the two ends of which are respectively fixed to the two transverse inner walls of the sliding mounting opening.

[0031] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves continuous operation of the entire transmission box assembly process through the coordinated use of multiple tooling fixtures, including: transmission box positioning, shaft component assembly, gear hoisting and meshing, shaft alignment detection and adjustment, and bearing press-fitting.

[0032] The housing positioning fixture in this invention enables six-degree-of-freedom fully constrained positioning of the transmission housing, ensuring stable assembly datum. Structurally, the housing positioning fixture includes a positioning support platform and a lifting platform. The bottom of the positioning support platform integrates a reversing turntable to support horizontal rotation of the housing to accommodate multi-station requirements. The lifting platform has a lifting clearance opening in the middle to avoid interference with internal components. Four connecting vertical plates are fixed below, each equipped with a side clamping positioning plate (hydraulically driven telescopic), achieving housing fixation through four-way synchronous clamping.

[0033] The gear lifting fixture in this invention can complete the clamping and pressing positioning of gears and realize the automatic transfer of shaft parts across workstations. In terms of process flow, during the clamping stage, the flipping plate is linked with the extension plate through the adapter angle seat, driving the two lifting clamping plates to clamp the gear; during the transfer stage, after the shaft assembly is completed, the flipping drive motor drives the flipping plate to rotate 90°, moving the component horizontally above the housing. By controlling the horizontal telescopic cylinder and the vertical telescopic cylinder in tandem, the position can be adjusted to accurately align with the shaft alignment tooling.

[0034] The shaft alignment fixture in this invention enables dynamic alignment detection and adaptive length adjustment of shaft components. The fixture includes an alignment slide and alignment rollers. The alignment slide is slidably mounted within the sliding mounting opening of the lifting platform and is driven laterally by a servo motor. The alignment rollers consist of two sets of rotating semi-cylinders (telescopic design) to adapt to different shaft lengths and retract to avoid obstruction during non-operational use. Furthermore, the slide position is adjusted in real-time via closed-loop feedback from a laser emitter / receiver, achieving an alignment accuracy of ±0.05mm.

[0035] The bearing press-fit fixture in this invention enables high-precision interference fit assembly of the bearing and shaft. Specifically, the press-fit telescopic cylinder drives two press-fit side plates to move in opposite directions, applying evenly distributed pressure to prevent bearing misalignment. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0037] Figure 1 This is a half-sectional view of the internal structure of each component in the present invention in the main view direction; Figure 2 This is a half-sectional view of the internal structure of each component in the present invention from a top-view perspective; Figure 3 This is a side view schematic diagram of the internal structure of each component in the present invention. Figure 4 This is a schematic diagram of the internal structure of the shaft alignment tooling in this invention from a side view. Figure 5 This is a schematic diagram of the overall external structure of the present invention in the main viewing direction; Figure 6 This is a schematic diagram of the overall external structure of the present invention from a top-down perspective.

[0038] In the diagram: 1-Assembly workbench, 2-C-type support frame, 3-Positioning support platform, 4-Rotating mounting port, 5-Reversing turntable, 6-Steering drive motor, 7-Lifting platform, 8-Lifting clearance port, 9-Connecting vertical plate, 10-Side clamping positioning plate, 11-Hydraulic telescopic cylinder, 12-Sliding mounting port, 13-Centering slide block, 14-Rotating limit frame, 15-Transmission drive motor, 16-Main drive wheel, 17-Rotating half-cylinder, 18-Electrically controlled telescopic cylinder, 19-Connecting shaft, 20-Secondary drive wheel, 21-Laser emitter, 22-Laser receiver 23-Sliding drive motor, 24-Drive threaded rod, 25-Horizontal support beam, 26-Tilting plate, 27-Tilting mounting base, 28-Tilting drive motor, 29-Horizontal telescopic cylinder, 30-Adapter angle seat, 31-Vertical telescopic cylinder, 32-Extension plate, 33-Lifting positioning plate, 34-Positioning telescopic cylinder, 35-Lifting clamp, 36-Assembly clearance opening, 37-Right-angle connecting plate, 38-Pressure-fitting telescopic cylinder, 39-Pressure-fitting side plate, 40-Pressure-fitting groove, 41-Loading robotic arm, 42-Loading chuck, 43-Transmission box. Detailed Implementation

[0039] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0040] like Figures 1 to 6 As shown, a tooling fixture for assembling a transmission box of an agricultural tiller includes an assembly workbench 1, which is a horizontally arranged square platform. The assembly workbench 1 is equipped with a box positioning fixture, a shaft alignment fixture, a bearing pressing fixture, and a gear lifting fixture.

[0041] The box positioning fixture includes two symmetrically arranged C-shaped support frames 2, the lower ends of which are fixed to one side of the upper surface of the assembly workbench 1.

[0042] The upper ends of the two C-shaped support frames 2 are fixed with positioning support platforms 3. The positioning support platforms 3 are horizontally set square platforms. A circular rotating mounting port 4 is opened in the middle of the upper surface of the positioning support platform 3. A reversing turntable 5 is rotatably installed in the rotating mounting port 4. The upper surface of the reversing turntable 5 is slightly higher than the upper surface of the positioning support platform 3.

[0043] A steering drive motor 6 is fixedly connected to the center of the lower surface of the positioning support platform 3. The end of the output shaft of the steering drive motor 6 passes upward through the positioning support platform 3 and is fixedly connected to the center of the lower surface of the reversing turntable 5.

[0044] The box positioning fixture also includes a lifting platform 7, which is a longitudinally extending square platform. The lifting platform 7 is located above the positioning support platform 3. A lifting clearance opening 8 is provided in the middle of the lifting platform 7. The lifting clearance opening 8 is set directly opposite the positioning support platform 3 and the size of the lifting clearance opening 8 is slightly larger than the size of the positioning support platform 3.

[0045] Four centrally symmetrical connecting vertical plates 9 are fixed to the lower surface of the lifting platform 7. The four connecting vertical plates 9 are set opposite to the four side ends of the positioning support platform 3. Each connecting vertical plate 9 is provided with a side clamping positioning plate 10 that can be extended and retracted.

[0046] The upper surface of the assembly workbench 1 is provided with four centrally symmetrical hydraulic telescopic cylinders 11 corresponding to the lifting platform 7. The upper telescopic end of each hydraulic telescopic cylinder 11 is fixed to the lower surface of the lifting platform 7.

[0047] The upper surface of the lifting platform 7 also has two symmetrical sliding mounting ports 12, which are located on the longitudinal sides of the lifting clearance port 8.

[0048] The shaft alignment fixture includes two alignment slides 13, which are square seats. The two alignment slides 13 are slidably fitted into two sliding mounting ports 12.

[0049] Each centering slide 13 has a rotation limiting frame 14 fixedly attached to its upper surface. The rotation limiting frame 14 is a U-shaped frame with a side opening. A transmission drive motor 15 is fixedly attached to the longitudinal outer wall of the rotation limiting frame 14. A main transmission wheel 16 is fixedly attached to the end of the output shaft of the transmission drive motor 15.

[0050] The shaft alignment fixture also includes several sets of alignment rollers. Each set of alignment rollers includes two telescopically connected rotating half-cylinders 17, and two sets of alignment rollers are rotatably installed on each rotating limit frame 14.

[0051] The two rotating half-cylinders 17 are fixedly connected by an electrically controlled telescopic cylinder 18.

[0052] A connecting shaft 19 is fixedly connected to the closed end face of the rotating half-cylinder 17, and the end of the connecting shaft 19 is rotatably mounted on the longitudinal inner wall of the rotating limit frame 14.

[0053] Each connecting shaft 19 has a secondary drive wheel 20 fixedly connected to its outer peripheral wall. The secondary drive wheel 20 engages with the main drive wheel 16 for transmission.

[0054] Two centering slides 13 are equipped with laser centering devices, which include symmetrically arranged laser emitters 21 and laser receivers 22. The laser emitters 21 and laser receivers 22 are respectively fixed to the middle of the upper surface of the two centering slides 13 and below the centering roller.

[0055] Two sliding drive motors 23 are fixedly connected to the two sliding mounting ports 12 on the horizontal outer wall of the lifting platform 7. The output shaft of the sliding drive motor 23 extends into the sliding mounting port 12 and is fixedly connected to a drive threaded rod 24.

[0056] The drive threaded rod 24 passes through and is threadedly connected to the centering slide block 13, and the end of the drive threaded rod 24 is rotatably supported on the transverse inner wall of the sliding mounting port 12.

[0057] Each sliding mounting port 12 is provided with a transverse support beam 25. The middle part of the transverse support beam 25 passes through the centering slide block 13, and the two ends of the transverse support beam 25 are respectively fixed to the two transverse inner walls of the sliding mounting port 12.

[0058] The gear lifting fixture includes a flip plate 26 that is closely attached to the upper surface of the assembly workbench 1. Two flip mounting seats 27 are provided on both sides of the end of the flip plate 26. The lower end of each flip mounting seat 27 is fixed to the upper surface of the assembly workbench 1.

[0059] Each flip mounting base 27 has a flip drive motor 28 fixedly connected to its longitudinal outer wall. The output shaft end of the flip drive motor 28 passes through the flip mounting base 27 and is fixedly connected to the side end face of the flip plate 26.

[0060] Two symmetrical horizontal telescopic cylinders 29 are fixedly connected to the transverse outer end face of the flip plate 26. The telescopic ends of the two horizontal telescopic cylinders 29 are fixedly connected to the adapter angle seat 30. Two symmetrical vertical telescopic cylinders 31 are fixedly connected to the upper surface of the adapter angle seat 30. The upper telescopic ends of the two vertical telescopic cylinders 31 are fixedly connected to the vertical extension plate 32.

[0061] Two symmetrical hoisting positioning plates 33 are fixedly connected to the longitudinal side edge of the extension plate 32. A positioning telescopic cylinder 34 is fixedly connected to the longitudinal inner wall of each hoisting positioning plate 33. A laterally extending hoisting clamp 35 is fixedly connected to the telescopic end of the positioning telescopic cylinder 34. An assembly clearance opening 36 is opened at the end of each hoisting clamp 35.

[0062] The bearing press-fit fixture includes two symmetrically arranged right-angle connecting plates 37. The lower end of the right-angle connecting plate 37 is fixed to the longitudinal side end face of the assembly workbench 1. The right-angle connecting plate 37 is set opposite to the lifting clamping plate 35. Four centrally symmetrical press-fit telescopic cylinders 38 are fixed to the longitudinal inner wall of each right-angle connecting plate 37. The telescopic ends of the four press-fit telescopic cylinders 38 are fixed to press-fit side plates 39. Press-fit grooves 40 are opened on the press-fit side plates 39.

[0063] A loading robotic arm 41 is rotatably mounted on the other side of the upper surface of the assembly workbench 1, and a loading chuck 42 is provided at the upper end of the loading robotic arm 41.

[0064] When using this invention: First, position the transmission housing: place the transmission housing 43 on the reversing turntable 5 as the assembly reference; start the hydraulic telescopic cylinder 11 to lift the lifting platform 7, so that the transmission housing 43 is embedded in the lifting clearance opening 8; control the four side clamping positioning plates 10 to extend synchronously, and complete the four-way clamping positioning of the transmission housing 43.

[0065] Next, the shaft assembly is performed: the loading robotic arm 41 grabs the transmission gear through the loading chuck 42 and moves it between the two hoisting positioning plates 33. The positioning telescopic cylinder 34 drives the gear to clamp in opposite directions, thus positioning the transmission gear; the loading chuck 42 grabs the shaft and performs hole-shaft mating with the transmission gear, thereby completing the shaft assembly; the two bearings are respectively embedded into the pressing slots 40 of the pressing side plate 39 to complete the bearing pre-assembly; the shaft position is adjusted by controlling the horizontal telescopic cylinder 29 and the vertical telescopic cylinder 31 to make the shaft end coaxial with the bearing; the pressing telescopic cylinder 38 is controlled to extend and press the bearings on both sides to the preset position on the shaft end and then reset.

[0066] Then, spatial orientation conversion is performed: the flip drive motor 28 is started, driving the flip plate 26 to rotate 90° clockwise, so that the flip plate 26 turns into a vertical state; the electric telescopic cylinder 18 extends the rotating half cylinder 17 to provide auxiliary support for the end of the shaft system.

[0067] Then perform laser alignment and positioning: activate the laser transmitter 21 and the laser receiver 22, adjust the lateral displacement of the alignment slide 13 by the sliding drive motor 23 until the laser signal is closed loop; control the two alignment slides 13 to move synchronously, and accurately move the shaft system to the mounting slot of the transmission box 43.

[0068] Finally, the final assembly and conversion are carried out: the side clamp positioning plate 10 is released from its constraint, the hydraulic telescopic cylinder 11 retracts to lower the lifting platform 7, and the shaft system and the housing are fitted together; the steering drive motor 6 drives the reversing turntable 5 to rotate 180°, and switches to the next work station; after repeating the above process to assemble the second set of shaft system, the transmission drive motor 15 is started, and the rotating half cylinder 17 is driven to rotate through the main transmission wheel 16, the auxiliary transmission wheel 20 and the connecting rotating shaft 19 to achieve double gear engagement.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A tooling fixture for assembling a transmission box of an agricultural tiller, characterized in that: The assembly workbench is equipped with a housing positioning fixture, a shaft alignment fixture, a bearing pressing fixture, and a gear lifting fixture. The box positioning fixture includes a positioning support platform fixedly disposed on one side of the upper surface of the assembly workbench, and a reversing turntable is rotatably disposed in the middle of the upper surface of the positioning support platform. A lifting platform is provided above the positioning support platform. Four centrally symmetrical connecting vertical plates are fixed to the lower surface of the lifting platform corresponding to the four side end faces of the positioning support platform. Each connecting vertical plate is provided with a side clamping positioning plate that can be extended and retracted. The upper surface of the lifting platform has a lifting clearance opening in the middle, and two symmetrical sliding mounting openings are provided on both sides of the upper surface of the lifting platform. The shaft alignment fixture includes two square alignment slides, which are respectively slidably fitted into the two sliding mounting openings; Each of the centering slide blocks is fixedly connected to a rotation limiting frame, and two sets of centering rollers are rotatably mounted on the rotation limiting frame. Each set of centering rollers includes two telescopically connected rotating half-cylinders. The two centering slides are equipped with laser centering devices, each comprising a symmetrically arranged laser emitter and laser receiver, which are respectively fixed to the middle of the upper surface of the two centering slides and below the centering roller. The gear lifting fixture includes a flip plate that is closely attached to the upper surface of the assembly workbench. Two flip mounting seats are provided on both sides of the end of the flip plate. The lower end of each flip mounting seat is fixed to the upper surface of the assembly workbench. A flip drive motor is fixedly connected to the longitudinal outer wall of each of the flip mounting bases. The output shaft end of the flip drive motor passes through the flip mounting base and is fixedly connected to the side end face of the flip plate. Two symmetrical horizontal telescopic cylinders are fixedly connected to the transverse outer end face of the flip plate. The telescopic ends of the two horizontal telescopic cylinders are fixedly connected to the adapter angle seat. Two symmetrical vertical telescopic cylinders are fixedly connected to the upper surface of the adapter angle seat. The upper telescopic ends of the two vertical telescopic cylinders are fixedly connected to the vertical extension plate. Two symmetrical hoisting positioning plates are fixedly connected to the longitudinal side edge of the extension plate. A positioning telescopic cylinder is fixedly connected to the longitudinal inner wall of each hoisting positioning plate. A laterally extending hoisting clamp is fixedly connected to the telescopic end of the positioning telescopic cylinder. An assembly clearance opening is opened at the end of each hoisting clamp. The bearing press-fit fixture includes two symmetrically arranged right-angle connecting plates. The lower end of the right-angle connecting plate is fixed to the longitudinal side end face of the assembly workbench. The right-angle connecting plate is positioned opposite the lifting clamping plate. Four centrally symmetrical press-fit telescopic cylinders are fixed to the longitudinal inner wall of each right-angle connecting plate. The telescopic ends of the four press-fit telescopic cylinders are fixed to press-fit side plates, and press-fit grooves are provided on the press-fit side plates.

2. The tooling fixture for assembling a transmission box of a farm tiller according to claim 1, characterized in that: A loading robotic arm is rotatably mounted on the other side of the upper surface of the assembly workbench, and a loading clamp is provided at the upper end of the loading robotic arm.

3. The tooling fixture for assembling a transmission box of a farming machine according to claim 1, characterized in that: A steering drive motor is fixedly connected to the center of the lower surface of the positioning support platform, and the end of the output shaft of the steering drive motor passes upward through the positioning support platform and is fixedly connected to the center of the lower surface of the reversing turntable. The upper surface of the assembly workbench is provided with four centrally symmetrical hydraulic telescopic cylinders corresponding to the lifting platform. The upper telescopic end of each hydraulic telescopic cylinder is fixed to the lower surface of the lifting platform.

4. The tooling fixture for assembling a transmission box of a tiller according to claim 1, characterized in that: A transmission drive motor is fixedly connected to the longitudinal outer wall of the rotation limit frame, and a main transmission wheel is fixedly connected to the end of the output shaft of the transmission drive motor. A connecting shaft is fixedly connected to the closed end face of the rotating half-cylinder, and the end of the connecting shaft is rotatably mounted on the longitudinal inner wall of the rotating limiting frame. Each of the connecting shafts has a secondary drive wheel fixedly connected to its outer peripheral wall, and the secondary drive wheel engages with the main drive wheel for transmission. The two rotating half-cylinders are fixedly connected by an electrically controlled telescopic cylinder.

5. The tooling fixture for assembling a transmission box of a tiller according to claim 1, characterized in that: Two sliding drive motors are fixedly connected to the two sliding mounting ports on the transverse outer wall of the lifting platform, and the output shaft of the sliding drive motor extends into the sliding mounting port and is fixedly connected to a drive threaded rod. The drive threaded rod passes through and is threadedly connected to the centering slide block, and the end of the drive threaded rod is rotatably supported on the transverse inner wall of the sliding mounting port.

6. The tooling fixture for assembling a transmission box of a tiller according to claim 5, characterized in that: Each of the sliding mounting openings is also provided with a transverse support beam, the middle part of which passes through the centering slide block, and the two ends of which are respectively fixed to the two transverse inner walls of the sliding mounting opening.

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