Transmission running-in device and running-in method

Abstract

The invention provides a transmission running-in device and a running-in method.The running-in device comprises a workbench, a positioning tool, a running-in driving mechanism, a running-in load mechanism, a running-in side pressing mechanism and an upper pressing mechanism, a positioning assembly is used for positioning the position of a workpiece, and the running-in driving mechanism is movably connected with a worm of the workpiece and used for providing running-in driving; the running-in load mechanism is movably connected with a worm wheel shaft of a workpiece and is used for providing running-in load, the running-in side pressure mechanism is used for providing running-in side pressure to flexibly adjust an inter-tooth gap between a worm and a worm wheel, the running-in driving mechanism is arranged on the driving seat, and an adjusting mechanism is arranged on the driving seat. The adjusting mechanism can adjust the angle between the driving seat and the workbench and the position of the running-in driving mechanism on the driving seat; and the upper pressing mechanism is matched with the positioning tool to fix a workpiece. The worm gear running-in device is good in running-in effect, small in worm gear abrasion, capable of improving the running-in efficiency and the running-in quality, capable of adapting to running-in of different types of worm transmission structures and wide in application range.

Description

Technical Field

[0001] This invention relates to the field of steering system assembly technology, and in particular to a transmission break-in device and break-in method. Background Technology

[0002] The steering gear is the most important component in a car's steering system. Inside the steering gear is a transmission structure, which is often driven by an electric motor. During assembly, the transmission structure is installed inside a housing to form a transmission assembly, and then the electric motor is assembled.

[0003] The steering gear transmission structure includes a worm gear drive. The gear meshing in this structure needs to be as precise as possible to ensure good power transmission and torque, while minimizing noise. Therefore, to achieve better meshing between the worm gear and worm, the worm gear drive structure needs to be run-in during assembly. However, existing run-in devices lack flexibility, typically using a fixed drive structure to rotate the worm for run-in. In actual use, however, the angles and positions of the worm gear and worm in the steering gear vary, making it impossible to run in the correct way for the steering gear type. This not only limits its use but also affects the quality of the run-in process.

[0004] Furthermore, to further suppress impact noise, existing steering systems use plastic worm gears, requiring a break-in period for the worm gear drive structure to ensure optimal tooth clearance (i.e., the clearance between the meshing tooth surfaces) between the worm gear and worm. However, existing break-in devices cannot automatically adjust the tooth clearance, resulting in high wear on the plastic worm gear during the break-in process and affecting its service life. Summary of the Invention

[0005] The present invention aims to provide a transmission break-in device to overcome the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a transmission running-in device, including a worktable, a positioning fixture, a running-in drive mechanism, a running-in load mechanism, and a running-in side pressure mechanism. The positioning fixture is located in the middle of the worktable and is used to position the workpiece. The running-in drive mechanism is located behind the positioning fixture and is movably connected to the worm gear of the workpiece to provide running-in drive. The running-in load mechanism is located below the positioning fixture and is movably connected to the worm wheel shaft of the workpiece to provide running-in load. At least one running-in side pressure mechanism is provided, arranged along the outer side of the positioning fixture, and is movably connected to the worm gear of the workpiece to provide running-in side pressure for flexible adjustment of the tooth clearance between the worm gear and the worm wheel. The running-in drive mechanism is located on a drive seat, and the drive seat is provided with an adjustment mechanism that can adjust the angle between the drive seat and the worktable, as well as the position of the running-in drive mechanism on the drive seat. An upper pressure mechanism is also provided above the positioning fixture, and the upper pressure mechanism cooperates with the positioning fixture to fix the workpiece.

[0007] Furthermore, in the aforementioned transmission break-in device, the positioning fixture includes a fixture base and a fixture assembly. The fixture assembly includes a fixture base plate and a positioning seat disposed on the fixture base plate. The fixture base plate is located above the fixture base and is detachably connected to the fixture base via a positioning pin and a knob buckle. The positioning seat has a central positioning hole in the middle that matches the shape of the workpiece for positioning the workpiece. A pin inserted into the workpiece is also provided on one side of the positioning seat. The fixture assembly also includes a swing arm cylinder disposed on the fixture base plate. The output end of the swing arm cylinder has a stop block. The stop block is disposed opposite to the break-in drive mechanism at both ends of the workpiece worm gear. Under the action of the swing arm cylinder, the stop block can be pressed against the outer end of the first end of the worm gear. Preferably, an adjusting base plate is provided between the fixture base and the fixture base plate. The fixture base plate is fixedly connected to the adjusting base plate via a positioning pin and a knob buckle. The adjusting base plate is adjustablely connected to the fixture base via an adjusting hole and an adjusting screw.

[0008] Furthermore, in the aforementioned transmission break-in device, the pressing mechanism includes a pressing support, a pressing cylinder, and a pressing sleeve. The pressing support is fixed above the worktable, and the pressing cylinder is located on its top. The output end of the pressing cylinder is provided with a pressing seat, and the pressing sleeve is detachably connected to the pressing seat below it. The pressing sleeve can be pressed onto the workpiece by the action of the pressing cylinder. A slide rail three is also provided on the rear side of the pressing seat and is slidably connected to it. The slide rail three is fixed to the pressing support plate, and the pressing support plate is located on the pressing support. Preferably, the pressing support plate is also provided with a buffer to limit the pressing stroke of the pressing sleeve, and both the buffer and the pressing sleeve can be quickly disassembled and assembled through a quick-change structure to adapt to different types of steering gear break-in.

[0009] Furthermore, in the aforementioned transmission break-in device, the break-in drive mechanism includes a movable base, a servo drive, a drive shaft, and a bearing housing. The servo drive is located at one end of the movable base, and its output end is connected to the first end of the drive shaft via a coupling. The drive shaft is inserted into the bearing housing and rotatably connected to it. The second end of the drive shaft is provided with a drive connector connected thereto. The drive connector rotates with the drive shaft and is elastically connected to it. The end of the drive connector is provided with a toothed portion that connects to the second end of the workpiece worm. The end of the second end of the worm is provided with a toothed structure that mates with the toothed portion. The toothed portion is inserted into the toothed structure on the worm, allowing the worm to rotate with the drive shaft. The end of the movable base near the positioning fixture is provided with a support plate that supports the drive connector.

[0010] Furthermore, in the aforementioned transmission break-in device, the drive joint is connected to the drive shaft via an elastic connector, which includes a connecting shaft and a spring. The drive joint is detachably connected to the connecting shaft via fasteners. The drive shaft has a sliding hole, into which the connecting shaft is inserted and slidably connected. The sliding hole has a limiting groove to restrict the rotation of the connecting shaft around it. A spring is also fitted inside the sliding hole and sleeved on the outside of a spring rod, which is fixed to the inner end of the connecting shaft. A sensing block is also provided on the connecting shaft. A detection sensor, which cooperates with the sensing block, detects whether the drive joint is connected to the worm gear. Preferably, the bearing housing also has a sensor for detecting the number of rotations of the drive shaft, and by changing the drive joint, it can be connected to different worm gears to adapt to different types of steering gear break-in.

[0011] Furthermore, in the aforementioned transmission break-in device, the break-in load mechanism includes a lower drive seat, a second servo drive, a torque sensor, a second connecting shaft, a drive sleeve, a rotating cylinder, and a support shaft seat. The lower drive seat is fixed below the fixture base of the positioning fixture. The second servo drive is located at the lower end of the lower drive seat. The second servo drive, the torque sensor, and the second connecting shaft are arranged sequentially from bottom to top along the axial direction of the worm gear shaft. The second servo drive and the torque sensor, as well as the torque sensor and the second connecting shaft, are connected by a coupling. The second connecting shaft is inserted into the rotating cylinder and rotatably connected to it. The support shaft seat is fixed on the fixture base. The upper end of the rotating cylinder is inserted into the support shaft seat and fixedly connected to it. The drive sleeve is elastically connected to the second connecting shaft. The upper end of the drive sleeve has a contour hole that matches the shape of the middle part of the worm gear shaft. The contour hole and the worm gear shaft cooperate to allow the worm gear shaft to rotate with the rotating sleeve. The drive sleeve has an insertion hole communicating with the contour hole. The lower end of the worm gear shaft is inserted into the insertion hole. Preferably, the rotating cylinder has a detection hole in the middle that communicates with the positioning seat, and a detection sensor on the positioning seat detects whether the worm gear shaft is in position.

[0012] Preferably, the drive sleeve is elastically connected to the connecting shaft 2 via an elastic connector 2. The elastic connector 1 includes a connecting shaft 3 and a spring 2. The rotating sleeve is detachably connected to the connecting shaft 3 via fasteners. The upper end of the connecting shaft 2 is provided with a sliding hole 2. The lower end of the connecting shaft 3 is inserted into the sliding hole 2 and slidably connected to the sliding hole 2. The sliding hole 2 is also provided with a limiting groove to restrict the rotation of the connecting shaft 3 around the sliding hole 2. The lower end of the sliding hole 2 is also provided with a spring 2 sleeved on the outside of the spring rod 2. The spring rod 2 is fixed below the connecting shaft 3.

[0013] Furthermore, in the aforementioned transmission break-in device, the break-in load mechanism further includes a centering component. This centering component is used to adjust the position of the torque sensor, ensuring that the output shaft of the servo drive two, the torque sensor, and the connecting shaft two are coaxially arranged along the worm gear shaft. The centering component includes a torque mounting plate, an adjusting plate one, and an adjusting plate two. The lower drive seat has a sliding part in the middle. The adjusting plate one is C-shaped and is sleeved on the rear side of the sliding part and slidably connected to it. The adjusting plate two is located on the front side of the sliding part and is connected to the adjusting plate one by fasteners. The front side of the adjusting plate two has a slide bar protruding from it. The rear side of the torque mounting plate has a slide groove that mates with the slide bar, and the torque mounting plate has an elongated hole. The torque mounting plate is connected to the adjusting plate two by fasteners passing through the elongated hole. The torque sensor is fixed on the torque mounting plate.

[0014] Furthermore, in the aforementioned transmission break-in device, two break-in side pressure mechanisms are provided, positioned opposite each other on both sides of the positioning fixture. Each break-in side pressure mechanism includes a side pressure drive, a side pressure moving seat, a side pressure plate, and a side pressure rod. The side pressure drive is located on the worktable, and its output end is equipped with a side pressure moving seat, which can drive the side pressure moving seat to move. The side pressure plate is arranged parallel to the side pressure moving seat and is flexibly connected to it. The side pressure rod is mounted on the side pressure plate through a pressure rod connecting seat. The side pressure rod can press against the side of the worm gear through the side pressure drive, which is used to flexibly adjust the tooth clearance between the worm gear and the worm wheel. The side pressure moving seat is also equipped with a displacement sensor for detecting the displacement of the side pressure rod and a pressure sensor for the side pressure pressure of the side pressure rod.

[0015] Furthermore, in the aforementioned transmission break-in device, the side pressure plate is flexibly connected to the side pressure moving seat via a flexible connector. The flexible connector includes a connecting shaft four and a sliding rod. Each end of the side pressure plate is provided with a sliding rod, which is inserted into the side pressure moving seat and slidably connected to it. The side pressure moving seat is provided with a linear bearing to guide the movement of the sliding rod, and the sliding rod is provided with two limiting blocks located on both sides of the side pressure moving seat. The two limiting blocks are used to limit the sliding stroke of the sliding rod in the side pressure moving seat. The connecting shaft four is coaxially arranged with the side pressure rod, and the first end of the connecting shaft four is connected to the side pressure plate, while the second end is inserted into a brake. The brake is located on the side pressure moving seat. The second end of the connecting shaft four is provided with a spring three connected to it. The spring three is sleeved outside the spring rod three. The end of the spring rod three away from the connecting shaft four is provided with a sensing cylinder and a pressure sensor in sequence. The pressure sensor is mounted on the side pressure moving seat via a sensor mounting block.

[0016] Furthermore, in the aforementioned transmission break-in device, the adjustment mechanism includes an adjustment component one for adjusting the angle between the drive seat and the worktable. The adjustment component one includes a hinge seat one, a hinge seat two, and an electric push rod. Two hinge seats one are provided on both sides of one end of the drive seat away from the positioning fixture, and two hinge seats two are provided on both sides of the other end. The electric push rod is arranged corresponding to the hinge seat one, and its telescopic end is provided with a Y-shaped joint that is hinged to the hinge seat one. The hinge seat two is hinged to the break-in worktable.

[0017] Furthermore, in the aforementioned transmission break-in device, the adjustment component one further includes a drive component for driving the two electric push rods to move synchronously. The drive component includes a geared motor and a rotating shaft. The geared motor is mounted on one of the electric push rods via a motor mounting base. The rotating shaft is located between the two electric push rods, and both ends of the rotating shaft are connected to the input shaft one of one electric push rod via a coupling. The output end of the geared motor is connected to the input shaft two of one electric push rod via a coupling. A magnetic powder brake is provided on the input shaft two of the other electric push rod.

[0018] Furthermore, in the aforementioned transmission break-in device, the adjustment mechanism further includes an adjustment component two for adjusting the position of the break-in drive mechanism on the drive seat. The adjustment component two includes a moving component one and a moving component two. The moving component one is disposed on the drive seat and can drive the break-in drive mechanism to move along a first direction. The moving component one includes a moving cylinder one and a moving plate. The moving cylinder one is disposed below the drive seat, and its output end is provided with a transition plate. The transition plate passes through the drive seat and is connected to the moving plate located above the drive seat. The drive seat is also provided with a plurality of slide rails one arranged parallel to the extension and retraction direction of the moving cylinder one. The moving plate is slidably connected to the slide rails one. The moving component two is disposed on the moving plate and can drive the break-in drive mechanism to move along a second direction. The first direction is perpendicular to the second direction. The moving component two includes a moving cylinder two and a slide rail two. The moving cylinder two is disposed on one side of the moving plate, and its output end is connected to the moving seat of the break-in drive mechanism. The slide rail two is arranged parallel to the extension and retraction direction of the moving cylinder two and is slidably connected to the moving seat.

[0019] This invention also provides a transmission break-in method for breaking in a worm gear transmission structure inside a workpiece, comprising the following steps: S1. Load the workpiece into the positioning fixture, and the controller controls the positioning fixture to position the workpiece. S2. The barcode scanner on the workbench scans and identifies the product type of the workpiece. If the position of the running-in drive mechanism matches the product type, proceed to the next step. If the position of the running-in drive mechanism does not match the product type, the adjustment mechanism adjusts the position of the running-in drive mechanism according to the product type. S3. The upper pressing mechanism is started, and the workpiece is fixed by upper pressing. At the same time, the worm gear shaft of the workpiece is lowered by the action of the upper pressing mechanism and connected to the running-in load mechanism; the swing arm cylinder on the positioning fixture drives the stop block to press on the outer end of the first end of the worm of the workpiece. S4. The break-in side pressure mechanism is activated. The side pressure rod of the break-in side pressure mechanism presses against the outside of the first end of the worm. Specifically, it is pressed onto the bearing located on the worm near the first end of the worm. When the side pressure of the break-in side pressure mechanism reaches the preset side pressure value, the position of the side pressure rod is fixed. The preset side pressure value is 9-11N. S5. The running-in drive mechanism is started. The drive joint of the running-in drive mechanism is connected to the second end of the worm. The running-in drive mechanism drives the worm to rotate according to the preset running-in action. At the same time, the running-in load mechanism is started, and a preset braking torque is applied to the worm wheel of the workpiece to start the running-in. The preset braking torque is 105-115 Nm. The break-in process includes the following steps: the worm gear accelerates from zero to a set forward speed, rotates 22-28 times at the set forward speed, and then decelerates until it stops after reaching the set number of rotations; after stopping for 1-2 seconds, the worm gear rotates in the opposite direction, accelerates from zero to a set reverse speed, and rotates 22-28 times at the set reverse speed, and then decelerates until it stops after reaching the set number of rotations; the acceleration and deceleration times are set to 1.5-2.5 seconds; the set forward and reverse speeds are the same, 1500-2000 rpm. S6. After the break-in period, all mechanisms are reset, and the workpiece is unloaded and removed.

[0020] Furthermore, in the aforementioned transmission break-in method, during the break-in process, the controller monitors break-in parameter one, which includes the maximum, minimum, average, and peak difference of braking torque; the maximum, minimum, average, and peak difference of side pressure; and the maximum, minimum, average, and peak difference of side pressure displacement. During the break-in process, the controller also monitors break-in parameter two, which includes the motor speed and motor angle of the servo drive one of the break-in drive mechanism; the motor speed, motor angle, and motor torque of the servo drive two of the break-in load mechanism; and the torque value of the torque sensor of the break-in load mechanism. Preferably, before and after the set break-in cycle, the pressure sensor, displacement sensor of the break-in side pressure mechanism, and the torque sensor of the break-in load mechanism need to be calibrated.

[0021] Compared with existing technologies, the advantages of this invention are: This invention allows for automatic break-in, and during the break-in process, the tooth clearance between the worm and worm wheel is flexibly adjusted through a break-in side pressure mechanism, resulting in better break-in performance, less worm wheel wear, extended service life, and improved break-in efficiency and quality. Furthermore, the position of the break-in drive mechanism can be adjusted via an adjustment mechanism to adapt to different types of worm gear transmission structures, offering good flexibility and a wide range of applications. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the transmission break-in device of the present invention; Figure 2 This is a partial structural schematic diagram of the transmission break-in device of the present invention; Figure 3 This is a partial structural diagram of the positioning fixture for the transmission break-in device of the present invention; Figure 4 This is a schematic diagram of the upper pressing mechanism of the transmission break-in device of the present invention; Figure 5 This is a schematic diagram of the running-in drive mechanism of the transmission running-in device of the present invention; Figure 6 This is a schematic diagram showing the connection between the running-in drive mechanism and the worm gear in the transmission running-in device of the present invention; Figure 7 This is a schematic diagram of the connection structure between the running-in load mechanism and the worm gear shaft of the transmission running-in device of the present invention; Figure 8 This is a partial structural diagram of the running-in load mechanism of the transmission running-in device of the present invention; Figure 9 This is a schematic diagram of the running-in side pressure mechanism of the transmission running-in device of the present invention; Figure 10 This is a partial cross-sectional schematic diagram of the running-in side pressure mechanism of the transmission running-in device of the present invention; Figure 11 This is a partial structural diagram of the adjustment mechanism of the transmission break-in device of the present invention. Figure 1 ; Figure 12 This is a partial structural diagram of the adjustment mechanism of the transmission break-in device of the present invention. Figure 2 ; Figure 13 This is a schematic diagram of the break-in parameters monitored by the controller of the present invention; In the diagram: 1. Workbench; 2. Positioning fixture; 21. Fixture base; 22. Fixture base plate; 23. Positioning seat; 24. Pin; 25. Swing arm cylinder; 26. Stop block; 27. Adjusting base plate; 3. Break-in drive mechanism; 31. Moving seat; 32. Servo drive one; 33. Drive shaft; 331. Sliding hole one; 34. Bearing seat; 35. Drive connector; 351. Toothed part; 36. Support plate; 37. Connecting shaft one; 38. Spring one; 39. Spring rod one; 311. Sensing block; 312. Detection sensor; 4. Running-in load mechanism; 41. Lower drive seat; 411. Sliding part; 42. Servo drive two; 43. Torque sensor; 44. Connecting shaft two; 45. Drive sleeve; 46. Rotating cylinder; 47. Support shaft seat; 48. Centering assembly; 481. Torque mounting plate; 482. Adjusting plate one; 483. Adjusting plate two; 484. Slide bar; 49. Elastic connecting part two; 491. Connecting shaft three; 492. Spring two; 493. Spring rod two; 5. Break-in side pressure mechanism; 51. Side pressure drive; 52. Side pressure moving seat; 53. Side pressure plate; 54. Side pressure rod; 55. Displacement sensor; 56. Connecting shaft four; 57. Slide rod; 58. Brake; 59. Spring three; 510. Sensing cylinder; 511. Sensor mounting block; 6. Drive unit; 7. Adjustment mechanism; 71. Adjustment component one; 711. Hinge seat one; 712. Hinge seat two; 713. Electric push rod; 714. Gear motor; 715. Rotating shaft; 716. Magnetic powder brake; 72. Adjustment component two; 721. Moving cylinder one; 722. Moving plate; 723. Adapter plate; 724. Slide rail one; 725. Moving cylinder two; 726. Slide rail two; 8. Upper pressing mechanism; 81. Upper pressing support; 82. Upper pressing cylinder; 83. Upper pressing cylinder; 84. Upper pressing seat; 85. Slide rail three; 86. Upper pressing support plate. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention is mainly used for the break-in of the worm gear transmission mechanism in the steering gear, that is, the workpiece for transmission break-in in the following text is the steering gear, and the worm gear transmission structure is installed in the housing of the steering gear.

[0026] Example 1 like Figure 1-12As shown, a transmission break-in device includes a worktable 1, a positioning fixture 2, a break-in drive mechanism 3, a break-in load mechanism 4, and a break-in side pressure mechanism 5. The positioning fixture 2 is located in the middle of the worktable 1 and is used to position the steering gear. The break-in drive mechanism 3 is located behind the positioning fixture 2 and is movably connected to the worm gear of the steering gear to provide break-in drive. The break-in load mechanism 4 is located below the positioning fixture 2 and is movably connected to the worm wheel shaft of the steering gear to provide break-in load. At least one break-in side pressure mechanism 5 is provided and is arranged along the outer side of the positioning fixture 2. The break-in side pressure mechanism 5 is movably connected to the worm gear of the steering gear to provide break-in side pressure and flexibly adjust the tooth clearance between the worm gear and the worm wheel. The break-in drive mechanism 3 is located on a drive seat 6, and the drive seat 6 is provided with an adjustment mechanism 7. The adjustment mechanism 6 can adjust the angle between the drive seat 6 and the worktable 1, as well as the position of the break-in drive mechanism 3 on the drive seat 6. An upper pressure mechanism 8 is also provided above the positioning fixture 2, and the upper pressure mechanism 8 cooperates with the positioning fixture 2 to fix the steering gear. During the break-in period, with the worm wheel shaft axis as the reference and the break-in load mechanism fixed, the position of the break-in drive mechanism is adjusted by the adjustment mechanism. It is suitable for worm drive structures with different angles and positions, thus adapting to the break-in of worm drive structures of different types of steering gears. It has good flexibility and a wide range of applications. In addition, the break-in side pressure mechanism provides side pressure during the break-in process, flexibly adjusting the tooth clearance between the worm and the worm wheel, resulting in a good break-in effect. Moreover, the plastic worm wheel has less wear, improving break-in efficiency and break-in quality.

[0027] In addition, such as Figure 1 As shown, a control cabinet is located below the workbench 1, and an outer frame is located above it. A controller (touch screen) is located on the outer frame, which can control the actions of each mechanism.

[0028] like Figure 2-3 As shown, the positioning fixture 2 includes a fixture base 21 and a fixture assembly. The fixture assembly includes a fixture base plate 22 and a positioning seat 23 disposed on the fixture base plate 22. The fixture base plate 22 is disposed above the fixture base 21 and is detachably connected to the fixture base 22 by a positioning pin and a rotary buckle. The fixture assembly can be quickly assembled and disassembled by the positioning pin and the rotary buckle, so that it can be quickly changed according to the type of steering gear. The positioning seat 23 has a central positioning hole in the middle that is adapted to the shape of the steering gear for positioning the position of the steering gear. In this embodiment, the central positioning hole is adapted to the end of the worm gear shaft installed on the steering gear housing. A pin 24 inserted into the steering gear is also provided on one side of the positioning seat 23. The position of the steering gear is completely positioned by the central positioning hole and the pin.

[0029] like Figure 2-3 , Figure 6As shown, the tooling assembly also includes a swing arm cylinder 25 mounted on the tooling base plate 22. The output end of the swing arm cylinder 25 is equipped with a stop block 26. The stop block 26 is positioned opposite to the running-in drive mechanism 3 at both ends of the steering gear worm. Under the action of the swing arm cylinder 25, the stop block 26 can press against the outer end of the first end of the worm, specifically, it is pressed against the outer end of the first end of the worm on the steering gear housing. The arrangement of the swing arm cylinder and the stop block can counteract the force applied to the second end of the worm when the running-in drive mechanism connects to the worm, preventing steering gear displacement during the running-in process from affecting the running-in process.

[0030] In addition, to ensure that the center positioning hole is coaxially set with the drive end of the running-in load mechanism, an adjusting base plate 27 is provided between the tooling base 21 and the tooling base plate 22. The tooling base plate 22 is fixedly connected to the adjusting base plate 27 by positioning pins and knob buckles, and the adjusting base plate 27 is adjustablely connected to the tooling base 21 by adjusting holes and adjusting screws.

[0031] like Figure 1 , Figure 4 As shown, the pressing mechanism 8 includes a pressing support 81, a pressing cylinder 82, and a pressing cylinder 83. The pressing support 81 is fixed above the worktable 1, and the pressing cylinder 82 is located on its top. The output end of the pressing cylinder 82 is provided with a pressing seat 84. The pressing cylinder 83 is detachably connected to the pressing seat 84. The pressing cylinder 83 can be pressed onto the steering gear by the action of the pressing cylinder 82. The rear side of the pressing seat 84 is also provided with a sliding rail 85 that is slidably connected to it. The sliding rail 85 is fixed on the pressing support plate 86, which is located on the pressing support 81. The pressing support plate is also provided with a buffer to limit the pressing stroke of the pressing cylinder 83. Both the buffer and the pressing cylinder can be quickly disassembled and assembled through a quick-change structure to adapt to different types of steering gear break-in.

[0032] like Figure 1 , Figure 9-10As shown, there are two break-in side pressure mechanisms 5, which are positioned opposite each other on both sides of the positioning fixture 2, corresponding to the left and right directions of the steering gear, thus saving changeover time. When there are different angles, the break-in side pressure mechanisms 5 can also be located at other positions outside the positioning station. The break-in side pressure mechanism 5 includes a side pressure drive 51, a side pressure moving seat 52, a side pressure plate 53, and a side pressure rod 54. The side pressure drive 51 is mounted on the workbench 1, and its output end is provided with the side pressure moving seat 52, which can drive the side pressure moving seat 52 to move. In this embodiment, the side pressure drive 51 is a lead screw linear module. The side pressure plate 53 is arranged parallel to the side pressure moving seat 52 and is flexibly connected to the side pressure moving seat 52. The side pressure rod 54 is mounted on the side pressure plate 53 through a pressure rod connecting seat. The side pressure rod 54 can press against the side of the worm through the side pressure drive 51, which is used to flexibly adjust the tooth clearance between the worm and the worm wheel, reduce the wear of the worm wheel during the break-in process, and accelerate the achievement of the best break-in effect. The side pressure moving seat 52 is also provided with a displacement sensor 55 for detecting the displacement of the side pressure rod 54 and a pressure sensor for the side pressure applied by the side pressure rod 54 to the worm, which controls the side pressure.

[0033] As shown in Figure 10, the side pressure plate 53 is flexibly connected to the side pressure moving seat 52 via a flexible connector. The flexible connector includes a connecting shaft 56 and a sliding rod 57. A sliding rod 57 is provided at each end of the side pressure plate 53. The sliding rod 57 is inserted into the side pressure moving seat 52 and is slidably connected to the side pressure moving seat 52. The side pressure moving seat 52 is provided with a linear bearing to guide the movement of the sliding rod 57, and the sliding rod 57 is provided with two limiting blocks located on both sides of the side pressure moving seat 52. The two limiting blocks are used to limit the sliding stroke of the sliding rod 57 in the side pressure moving seat 52. This allows for control of lateral pressure displacement. Connecting shaft 56 and side pressure rod 54 are coaxially arranged, with the first end of connecting shaft 56 connected to side pressure plate 53 and the second end inserted into brake 58, which is mounted on side pressure moving seat 52. The second end of connecting shaft 56 is connected to spring 59, which is sleeved on the outside of spring rod 3. At the end of spring rod 3 away from connecting shaft 56, a sensing cylinder 510 and a pressure sensor are sequentially arranged. The pressure sensor is mounted on side pressure moving seat 52 via sensor mounting block 511. Through the flexible connector, the lateral pressure displacement can be flexibly adjusted according to the lateral pressure, thereby flexibly adjusting the tooth clearance between the worm and worm wheel. The side pressure rod is fixed at the preset lateral pressure position, stabilizing the force applied to the worm and ensuring consistent lateral pressure during the break-in process of each steering gear, thus guaranteeing stable break-in quality.

[0034] Example 2 Based on the structure of Example 1, such as Figure 5-6As shown, the break-in drive mechanism 3 includes a movable seat 31, a servo drive 32, a drive shaft 33, and a bearing housing 34. The servo drive 32 is located at one end of the movable seat 31, and its output end is connected to the first end of the drive shaft 33 via a coupling. The drive shaft 33 is inserted into the bearing housing 34 and rotatably connected to the bearing housing 34. The second end of the drive shaft 33 is provided with a drive connector 35 connected to it. The drive connector 35 rotates with the drive shaft 34 and is elastically connected to the drive shaft 34. The end of the drive connector 35 is provided with a toothed part 351 that connects to the second end of the steering gear worm. The end of the second end of the worm is provided with a toothed structure that mates with the toothed part 351. The toothed part is inserted into the toothed structure on the worm, allowing the worm to rotate with the drive shaft 33. The end of the movable seat 31 near the positioning fixture 2 is provided with a support plate 36 that supports the drive connector 35, making the connection between the drive connector and the worm more stable.

[0035] The drive connector 35 is connected to the drive shaft 33 via an elastic connector 1. The elastic connector 1 includes a connecting shaft 37 and a spring 38. The drive connector 35 is detachably connected to the connecting shaft 37 via fasteners, allowing for quick assembly and disassembly. By replacing the drive connector 35, it can be connected to different worm gears, thus adapting to different types of steering gear break-in. The drive shaft 33 has a sliding hole 331 inside, and the connecting shaft 37 is inserted into the sliding hole 331 and slidably connected to the sliding hole 331. The front end of the sliding hole 331 has a limiting groove to restrict the rotation of the connecting shaft 37 around the sliding hole 331. In this embodiment, the limiting groove is a keyway. Alternatively, the front end of the sliding hole can be directly set as a square hole, a triangular hole, or a round hole with a flat opening to restrict rotation. The rear end of the sliding hole 331 also has a spring 38 sleeved on the outside of the spring rod 39. The spring rod 39 is fixed to the inner end of the connecting shaft 37. By setting the elastic connector, a docking buffer can be provided when the drive joint 35 is connected to the second end of the worm gear, so as to avoid the impact of docking vibration on the equipment and steering gear and improve the running-in stability.

[0036] A sensing block 311 is also provided on the connecting shaft 37, and a detection sensor 312 is provided on the support plate 36 to detect whether the drive connector 35 is connected to the worm gear, in conjunction with the sensing block 311. During docking, the servo drive 1 drives the drive connector 35 to rotate slowly. When the toothed part of the drive connector 35 engages with the toothed structure at the second end of the worm gear, the sensing block 311 triggers the detection sensor 312 to indicate that the docking is in place, ensuring that the break-in load mechanism can accurately provide break-in drive to the steering gear. In addition, a sensor for detecting the number of rotations of the drive shaft 33 is also provided on the bearing housing 34.

[0037] like Figure 2 , Figure 7As shown, the break-in load mechanism 4 includes a lower drive seat 41, a second servo drive 42, a torque sensor 43, a second connecting shaft 44, a drive sleeve 45, a rotating cylinder 46, and a support shaft seat 47. The lower drive seat 41 is fixed below the tooling base 21 of the positioning tooling 2. The second servo drive 42 is located at the lower end of the lower drive seat 41. The second servo drive 42, the torque sensor 43, and the second connecting shaft 44 are arranged sequentially from bottom to top along the axial direction of the worm gear shaft. The second servo drive 42 is connected to the torque sensor 43, and the torque sensor 43 is connected to the second connecting shaft 44 via a coupling. The second connecting shaft 44 is inserted into the rotating cylinder 46 and is rotatably connected to the rotating cylinder 46. Specifically, the upper and lower parts of the rotating cylinder 46 are connected to the second servo drive 45. The rotating cylinder 46 supports the connecting shaft 44, forming a stable structure. A support shaft seat 47 is fixed to the tooling base 21. The upper end of the rotating cylinder 46 is inserted into the support shaft seat 47 and fixedly connected to it for easy installation. The drive sleeve 45 is elastically connected to the connecting shaft 44. The upper end of the drive sleeve 45 has a contour hole adapted to the shape of the middle part of the worm gear shaft. The contour hole mates with the worm gear shaft, allowing the worm gear shaft to rotate with the rotating sleeve. In this embodiment, the contour hole mates with a triangular flat opening located outside the worm gear shaft. The drive sleeve 45 has an insertion hole communicating with the contour hole. The lower end of the worm gear shaft is inserted into the insertion hole, with a clearance fit between the insertion hole and the worm gear shaft. Furthermore, the rotating cylinder 45 has a detection hole communicating with the positioning seat 21. The positioning seat has a sensor that passes through the detection hole to detect whether the worm gear shaft is in position.

[0038] In the above structure, the drive sleeve 45 is elastically connected to the connecting shaft 44 via an elastic connector 49. The elastic connector 49 includes a connecting shaft 491 and a spring 492. The rotating sleeve 45 is detachably connected to the connecting shaft 491 via fasteners. The upper end of the connecting shaft 44 is provided with a sliding hole 491. The lower end of the connecting shaft 491 is inserted into the sliding hole 491 and slidably connected to it. The sliding hole 491 is also provided with a limiting groove to restrict the rotation of the connecting shaft 491 around the sliding hole 491. The lower end of the sliding hole 491 is also provided with a spring 492 sleeved on the outside of the spring rod 493. The spring rod 493 is fixed below the connecting shaft 491. In this embodiment, the elastic connector 492 is similar in structure and principle to the elastic connector 491, and will not be described in detail here.

[0039] like Figure 7-8As shown, the break-in load mechanism 4 also includes a centering component 48, which is used to adjust the position of the torque sensor 43 so that the output shaft of the servo drive 42, the torque sensor 43, and the connecting shaft 44 are coaxially arranged along the worm gear shaft. The centering component 48 includes a torque mounting plate 481, an adjusting plate 482, and an adjusting plate 483. The lower drive seat 41 has a sliding part 411 in the middle. The adjusting plate 482 is C-shaped and is sleeved on the rear side of the sliding part 411 and is flush with the sliding part 411. A sliding connection is used. Adjusting plate 2 483 is located on the front side of sliding part 411 and is connected to adjusting plate 1 482 by fasteners. Adjusting plate 2 483 has a sliding strip 484 protruding from its front side. Torque mounting plate 481 has a sliding groove on its rear side that mates with the sliding strip 484. Torque mounting plate 481 has an elongated hole. Torque mounting plate 481 is connected to adjusting plate 2 483 by fasteners passing through the elongated hole. Torque sensor 43 is fixed on torque mounting plate 481. Sliding part 411 has cavities on its upper and lower sides for adjusting plate 1 482 to slide. The displacement of torque sensor 43 in the up-down and left-right directions is adjusted by adjusting plate 1 482 and adjusting plate 2 483. Its displacement in the front-back direction is adjusted by the mounting hole of torque mounting plate 481 to ensure the centering and coaxiality of torque sensor, thereby ensuring synchronization between servo drive 2 and torque sensor.

[0040] like Figure 2 , Figure 6 , Figure 11-12 As shown, the adjustment mechanism 7 includes an adjustment component 71 for adjusting the angle between the drive seat 6 and the worktable 1. The adjustment component 71 includes a hinge seat 711, a hinge seat 712, and an electric push rod 713. Two hinge seats 711 are provided on both sides of one end of the drive seat 711 away from the positioning fixture 1, and two hinge seats 712 are provided on both sides of the other end. The electric push rod 713 is correspondingly arranged with the hinge seats 711, and its telescopic end is provided with a Y-type joint that is hinged to the hinge seats 711. The hinge seats 712 are hinged to the worktable 1, and a mounting seat that is hinged to the hinge seats 712 is provided on the worktable.

[0041] like Figure 12As shown, the adjustment assembly 71 also includes a drive assembly for synchronously driving two electric push rods 713. The drive assembly includes a geared motor 714 and a rotating shaft 715. The geared motor 714 is mounted on one of the electric push rods 713 via a motor mounting bracket. The rotating shaft 715 is located between the two electric push rods 713, and both ends of the rotating shaft 714 are connected to the input shaft of one electric push rod 713 via a coupling. The electric push rod 713 has dual input shafts. The output end of the geared motor 714 is connected to the second input shaft of one electric push rod 713 via a coupling. A magnetic powder brake 716 is provided on the second input shaft of the other electric push rod 713. When the electric push rod drives the drive seat 6 to rotate to a set angle, the magnetic powder brake is activated to prevent the rotating shaft from rotating, thereby ensuring that the position of the drive seat 6 remains unchanged during the break-in process and ensuring the break-in quality.

[0042] like Figure 2 , Figure 6 , Figure 11-12 As shown, the adjustment mechanism 7 also includes an adjustment component 2 72 for adjusting the position of the break-in drive mechanism 3 on the drive seat 6. The adjustment component 2 72 includes a moving component 1 and a moving component 2. The moving component 1 is located on the drive seat 6 and can drive the break-in drive mechanism 3 to move in a first direction. The moving component 1 includes a moving cylinder 1 721 and a moving plate 722. The moving cylinder 1 721 is located below the drive seat 6, and its output end is provided with a converter plate 723. The converter plate 723 passes through the drive seat 6 and is connected to the moving plate 722 located above the drive seat 6. The drive seat 6 is also provided with multiple moving components. A sliding rail 724 is arranged parallel to the extension and retraction direction of the first cylinder 721, and a moving plate 722 is slidably connected to the sliding rail 724. A second moving component is disposed on the moving plate 722 and can drive the running-in drive mechanism 3 to move along a second direction. The first direction is perpendicular to the second direction. The second moving component includes a second moving cylinder 725 and a second sliding rail 726. The second moving cylinder 725 is disposed on one side of the moving plate 722, and its output end is connected to the moving seat 31 of the running-in drive mechanism 3. The second sliding rail 726 is arranged parallel to the extension and retraction direction of the second moving cylinder 725 and is slidably connected to the moving seat 31. In this embodiment, the second direction is the worm shaft axis, and the first direction is the direction perpendicular to the worm shaft axis. The second moving component can not only adjust the position of the running-in drive mechanism 3 in the second direction, but also drive the running-in drive mechanism 3 to connect with the second end of the worm.

[0043] The present invention also provides a transmission break-in method, comprising the following steps: S1. Load the steering gear into the positioning fixture 2, and the controller controls the positioning fixture 2 to position the steering gear. S2. The barcode scanner on the workbench 1 scans and identifies the product type of the steering gear. If the position of the break-in drive mechanism 3 matches the product type, proceed to the next step. If the position of the break-in drive mechanism 3 does not match the product type, the adjustment mechanism 7 adjusts the position of the break-in drive mechanism 3 according to the product type to match the product type. S3. The upper pressing mechanism 8 is activated, pressing and fixing the steering gear. At the same time, the worm gear shaft in the steering gear descends under the action of the upper pressing mechanism 8 and connects with the break-in load mechanism 4. The swing arm cylinder 25 on the positioning fixture 2 drives the stop block 26 to press against the outer end of the first end of the steering gear worm. S4. The break-in side pressure mechanism 5 is activated. The side pressure rod 54 of the break-in side pressure mechanism 5 presses against the outside of the first end of the worm. Specifically, it is pressed onto the bearing located near the first end of the worm. When the pressure sensor of the break-in side pressure mechanism 5 detects that the side pressure reaches the preset side pressure value, the brake 58 on the break-in side pressure mechanism 5 is activated to fix the position of the side pressure rod 54. The preset side pressure value is 9-11N. At the same time, the displacement sensor monitors the displacement change of the side pressure rod.

[0044] S5. The break-in drive mechanism 3 is started. The drive joint 35 of the break-in drive mechanism 3 is connected to the second end of the worm. The break-in drive mechanism 3 drives the worm to rotate according to the preset break-in action. At the same time, the break-in load mechanism 4 is started, and a preset braking torque is applied to the worm wheel to start the break-in. The preset braking torque is 105-115 Nm. The break-in process includes the following steps: The worm gear accelerates from zero to the set forward speed, rotates 22-28 times at the set forward speed, and then decelerates until it stops after reaching the set number of rotations; after stopping for 1-2 seconds, a reversal buffer time is provided, and the worm gear rotates in the opposite direction, accelerating from zero to the set reverse speed, and rotating 22-28 times at the set reverse speed, and then decelerating until it stops after reaching the set number of rotations; the acceleration and deceleration time is set to 1.5-2.5 seconds; it should be noted that the number of rotations can also be controlled by the rotation time; the set forward and reverse speeds are the same, 1500-2000 rpm; S6. After the break-in period, all mechanisms are reset, and the steering gear is unloaded and removed. In this embodiment, the workpiece is unloaded and loaded by a robot to achieve fully automated break-in.

[0045] In addition, during the break-in process, the controller monitors break-in parameter one and break-in parameter two. Break-in parameter one includes the maximum, minimum, average and peak difference of braking torque, the maximum, minimum, average and peak difference of side pressure, and the maximum, minimum, average and peak difference of side pressure displacement, and monitors whether the break-in drive, load and side pressure are within the set range.

[0046] The second break-in parameter includes the motor speed and angle of servo drive one in the break-in drive mechanism, the motor speed, motor angle, and motor torque of servo drive two in the break-in load mechanism, and the torque value of the torque sensor in the break-in load mechanism. Monitoring break-in parameters one and two can be used to eliminate break-in abnormalities, facilitate subsequent correlation and viewing of abnormal data, and thus quickly identify the cause of the abnormality. Furthermore, comparing the torque value of the torque sensor with the motor torque value of servo drive two can check whether the torque sensor is offset, causing asynchrony.

[0047] In addition, before and after the set break-in period, the pressure sensor, displacement sensor of the break-in side pressure mechanism and the torque sensor of the break-in load mechanism need to be calibrated. In this embodiment, calibration is performed using calibration fixtures to ensure accurate detection of each sensor.

[0048] In summary, this invention enables automatic break-in and flexibly adjusts the tooth clearance between the worm and worm wheel during the break-in process through a break-in side pressure mechanism. This results in a good break-in effect, minimal worm wheel wear, extended service life, and improved break-in efficiency and quality. Furthermore, the adjustment mechanism allows for the adjustment of the break-in drive mechanism's position, adapting to different types of worm gear transmission structures, offering high flexibility and a wide range of applications.

[0049] It should be noted that this invention is also applicable to the break-in of other worm gear transmission structures and is not limited to steering gears.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A transmission break-in device, characterized by: The invention discloses a workbench, a positioning tool, a running-in driving mechanism, a running-in load mechanism, and a running-in side pressure mechanism. The positioning tool is installed in the middle of the workbench and used for positioning the workpiece. The running-in driving mechanism is installed at the rear side of the positioning tool and connected with the worm of the workpiece, which is used for providing running-in driving. The running-in load mechanism is installed below the positioning tool and connected with the worm shaft of the workpiece, which is used for providing running-in load. The running-in side pressure mechanism is installed at the outer side of the positioning tool and connected with the worm of the workpiece, which is used for providing running-in side pressure and adjusting the gap between the worm and the worm gear. The running-in driving mechanism is installed on the driving seat, and the driving seat is provided with an adjusting mechanism, which can adjust the angle between the driving seat and the workbench and the position of the running-in driving mechanism on the driving seat. The upper pressure mechanism is installed above the positioning tool and used for fixing the workpiece.

2. A running-in device according to claim 1, characterised in that: The positioning tool comprises a tool base and a tool assembly. The tool assembly comprises a tool base plate and a positioning seat installed on the tool base plate. The tool base plate is installed above the tool base and detachably connected with the tool base through positioning pins and knob pressure buckles. The middle part of the positioning seat is provided with a center positioning hole matched with the shape of the workpiece, which is used for positioning the workpiece. One side of the positioning seat is also provided with a pin inserted into the workpiece. The tool assembly further comprises a swing arm air cylinder installed on the tool base plate. The output end of the swing arm air cylinder is provided with a stop block. The stop block is oppositely installed at the two ends of the worm of the workpiece relative to the running-in driving mechanism. The stop block can be pressed on the outer end of the first end of the worm under the action of the swing arm air cylinder.

3. A running-in device according to claim 1, characterised in that: The upper pressure mechanism comprises an upper pressure support, an upper pressure cylinder, and an upper pressure cylinder. The upper pressure support is fixed above the workbench and provided with the upper pressure cylinder at the top. The output end of the upper pressure cylinder is provided with an upper pressure seat. The lower part of the upper pressure seat is provided with an upper pressure cylinder detachably connected therewith. The upper pressure cylinder can be pressed above the workpiece through the action of the upper pressure cylinder. The rear side of the upper pressure seat is also provided with a sliding rail three slidably connected therewith. The sliding rail three is fixed on the upper pressure support plate. The upper pressure support plate is installed on the upper pressure support.

4. A running-in device according to claim 1, characterised in that: The running-in driving mechanism comprises a moving seat, a servo drive one, a driving shaft, and a bearing seat. The servo drive one is installed at one end of the moving seat. The output end of the servo drive one is connected with the first end of the driving shaft through a shaft coupling. The driving shaft is inserted into the bearing seat and rotatably connected with the bearing seat. The second end of the driving shaft is provided with a driving connector connected therewith. The driving connector rotates with the driving shaft and is elastically connected with the driving shaft. The end of the driving connector is provided with a tooth-shaped part connected with the second end of the worm of the workpiece. The end of the moving seat close to the positioning tool is provided with a support plate supporting the driving connector.

5. A running-in device according to claim 4, characterised in that: The driving joint is connected with the driving shaft through an elastic connecting piece one, the elastic connecting piece one comprises a connecting shaft one and a spring one, the driving joint is detachably connected with the connecting shaft one through a fastener, the driving shaft is internally provided with a sliding hole one, the connecting shaft one is inserted into the sliding hole one and is in sliding connection with the sliding hole one, the sliding hole one is provided with a limiting groove for limiting rotation of the connecting shaft one around the sliding hole one, the sliding hole one is further internally provided with the spring one which is sleeved on the outside of a spring rod one, the spring rod one is fixed to the inside end of the connecting shaft one, the connecting shaft one is further provided with a sensing block, the supporting plate is provided with a detection sensor which is matched with the sensing block to detect whether the driving joint is connected with the worm.

6. A running-in device according to claim 1 or 2, characterised in that: The running-in load mechanism comprises a lower driving base, a servo drive two, a torque sensor, a connecting shaft two, a driving sleeve, a rotating cylinder and a support shaft base, the lower driving base is fixed below a jig base of a positioning jig, the servo drive two is arranged at the lower end of the lower driving base, the servo drive two, the torque sensor and the connecting shaft two are sequentially arranged along the axial direction of the worm shaft from bottom to top, and the servo drive two and the torque sensor and the torque sensor and the connecting shaft two are connected through a shaft coupling, the connecting shaft two is inserted into the rotating cylinder and is in rotary connection with the rotating cylinder, the support shaft base is fixed on the jig base, the upper end of the rotating cylinder is inserted into the support shaft base and is fixedly connected with the support shaft base, the driving sleeve is elastically connected with the connecting shaft two, and the upper end of the driving sleeve is provided with a profiling hole which is matched with the outer shape of the middle part of the worm shaft, the inside of the driving sleeve is provided with a insertion hole which is in communication with the profiling hole, and the lower end of the worm shaft is inserted into the insertion hole.

7. A running-in device according to claim 6, characterised in that: The running-in load mechanism further comprises a centering assembly, the centering assembly is used for adjusting the position of the torque sensor, so that the output shaft of the servo drive two, the torque sensor and the connecting shaft two are coaxially arranged along the axial direction of the worm shaft, the centering assembly comprises a torque mounting plate, an adjusting plate one and an adjusting plate two, the middle part of the lower driving base is provided with a sliding part, the adjusting plate one is C-shaped, is sleeved on the rear side of the sliding part and is in sliding connection with the sliding part, the adjusting plate two is arranged on the front side of the sliding part and is connected with the adjusting plate one through a fastener, the front side of the adjusting plate two is provided with a slide strip which protrudes from the adjusting plate two, the rear side of the torque mounting plate is provided with a sliding groove which is matched with the slide strip, the torque mounting plate is provided with a long hole, and the torque mounting plate is connected with the adjusting plate two through a fastener which passes through the long hole, and the torque sensor is fixed on the torque mounting plate.

8. A running-in device according to claim 1 or 3, characterised in that: The running-in side pressure mechanism is arranged on the two sides of the positioning jig, and comprises a side pressure drive, a side pressure moving base, a side pressure plate and a side pressure rod, the side pressure drive is arranged on the workbench, the output end of the side pressure drive is provided with the side pressure moving base, the side pressure moving base can be driven to move, the side pressure plate is arranged in parallel with the side pressure moving base and is flexibly connected with the side pressure moving base, the side pressure rod is installed on the side pressure plate through a pressure rod connecting base, the side pressure rod can be pressed on the side surface of the worm through the side pressure drive, and is used for flexibly adjusting the tooth gap between the worm and the worm gear, the side pressure moving base is further provided with a displacement sensor for detecting the displacement of the side pressure rod and a pressure sensor for detecting the side pressure of the side pressure rod.

9. A running-in device according to claim 8, characterised in that: The side pressing plate is flexibly connected with the side pressing moving base through a flexible connecting piece, the flexible connecting piece comprises a connecting shaft four and a sliding rod, two sliding rods are arranged at two ends of the side pressing plate respectively, the sliding rods are inserted into the side pressing moving base and are in sliding connection with the side pressing moving base, two limiting blocks are arranged on the sliding rods and located on two sides of the side pressing moving base, and the two limiting blocks are used for limiting the sliding stroke of the sliding rods in the side pressing moving base, the connecting shaft four is coaxially arranged with the side pressing rod, a first end of the connecting shaft four is connected with the side pressing plate, and a second end of the connecting shaft four is inserted into the brake, the brake is arranged on the side pressing moving base, a spring three connected with the second end of the connecting shaft four is arranged on the second end of the connecting shaft four, the spring three is arranged outside the spring rod three, and an induction cylinder and a pressure sensor are sequentially arranged at an end of the spring rod three away from the connecting shaft four, and the pressure sensor is arranged on the side pressing moving base through a sensor mounting block.

10. The break-in device of claim 1, wherein: The adjusting mechanism comprises an adjusting assembly one for adjusting the angle between the adjusting driving base and the workbench, the adjusting assembly one comprises a hinge base one, a hinge base two and an electric push rod, two hinge base ones are arranged at two sides of an end of the driving base away from the positioning tool, two hinge base twos are arranged at two sides of the other end, the electric push rod is arranged in correspondence with the hinge base one, a Y-shaped joint hinged with the hinge base one is arranged at the extension end of the electric push rod, and the hinge base two is hinged with the grinding workbench.

11. A running-in device according to claim 10, characterised in that: The adjusting assembly one further comprises a driving assembly for driving the two electric push rods to move synchronously, the driving assembly comprises a speed reducer motor and a rotating shaft, the speed reducer motor is mounted on one of the electric push rods through a motor mounting base, the rotating shaft is arranged between the two electric push rods, and the two ends of the rotating shaft are connected with the input shaft one of one electric push rod and the input shaft two of the other electric push rod through a coupling respectively, the output end of the speed reducer motor is connected with the input shaft two of one electric push rod through a coupling, and the input shaft two of the other electric push rod is provided with a magnetic powder brake.

12. A running-in device according to claim 10, characterised in that: The adjusting mechanism further comprises an adjusting assembly two for adjusting the position of the grinding driving mechanism on the driving base, the adjusting assembly two comprises a moving assembly one and a moving assembly two, the moving assembly one is arranged on the driving base and can drive the grinding driving mechanism to move in a first direction, the moving assembly one comprises a moving cylinder one and a moving plate, the moving cylinder one is arranged below the driving base, the output end of the moving cylinder one is provided with an adapter plate, the adapter plate penetrates through the driving base and is connected with the moving plate arranged above the driving base, a plurality of slide rails one parallel to the extension direction of the moving cylinder one are arranged above the driving base, and the moving plate is in sliding connection with the slide rails one, and the moving assembly two is arranged on the moving plate and can drive the grinding driving mechanism to move in a second direction, the first direction is perpendicular to the second direction, the moving assembly two comprises a moving cylinder two and a slide rail two, the moving cylinder two is arranged on one side of the moving plate, the output end of the moving cylinder two is connected with the moving base of the grinding driving mechanism, and the slide rail two is arranged in parallel with the extension direction of the moving cylinder two and is in sliding connection with the moving base.

13. A method of running-in a transmission for running-in a worm and worm wheel transmission arrangement in a workpiece, which method is applied to the transmission running-in device according to any one of claims 1 to 12, characterised in that The method comprises the following steps: S1, loading the workpiece to the positioning tool, and controlling the positioning tool to position the workpiece; S2, the code scanner on the workbench scans and identifies the product type of the workpiece. If the matching driving mechanism position and the product type are consistent, the next step is performed. If the matching driving mechanism position and the product type are inconsistent, the adjusting mechanism adjusts the matching driving mechanism position according to the product type; S3, the upper pressing mechanism is started, the workpiece is fixed, and the worm shaft of the workpiece is lowered under the action of the upper pressing mechanism and connected with the matching load mechanism; the swing arm cylinder on the positioning tool drives the stopper block to press the first end of the worm outside the workpiece; S4, the matching side pressing mechanism is started, the side pressing rod of the matching side pressing mechanism is pressed on the first end of the worm, and the position of the side pressing rod is fixed when the side pressing force of the matching side pressing mechanism reaches the preset side pressing force; S5, the matching driving mechanism is started, the driving joint of the matching driving mechanism is connected with the second end of the worm, the matching driving mechanism drives the worm to rotate according to the preset matching action, and at the same time, the matching load mechanism is started to apply a set of preset braking torque to the worm gear of the workpiece, and the matching process is started; The matching action includes the following steps: the worm is accelerated from zero to a set positive rotation speed, rotates 22-28 turns at the set positive rotation speed, and then decelerates until it stops after reaching the set number of turns; after stopping for 1-2 seconds, the worm reverses its rotation, accelerates from zero to a set reverse rotation speed, and rotates 22-28 turns at the set reverse rotation speed, and then decelerates until it stops after reaching the set number of turns; the set positive rotation speed and reverse rotation speed are the same, which is 1500-2000 rpm; S6, after the matching is completed, each mechanism is reset, and the workpiece is taken out.

14. A break-in method of a transmission as set forth in claim 13, characterized in that: During the matching process, the controller monitors the matching parameter one, which includes the maximum, minimum, average and peak difference of the braking torque, the maximum, minimum, average and peak difference of the side pressing force, and the maximum, minimum, average and peak difference of the side pressing displacement; The controller also monitors the matching parameter two, which includes the motor speed and angle of the servo drive one of the matching driving mechanism, the motor speed, angle and torque of the servo drive two of the matching load mechanism, and the torque value of the torque sensor of the matching load mechanism.

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