A detection device for a vehicle steering gear

Abstract

This utility model discloses a testing device for automotive steering gears, including a test bench; a clamping assembly on the test bench for fixing the steering gear; a first bracket on the test bench, on which a steering drive device is mounted, connected to the rotation shaft of the steering gear to provide power for its rotation; tension and compression sensors on the test bench, two of which are connected to both ends of the steering gear; a support assembly slidably mounted on the test bench, located below the clamping assembly, for limiting the clamping assembly; a vibration assembly on the test bench, connected to the clamping assembly, for driving the clamping assembly to vibrate longitudinally; and rotatable mounting plates on the test bench, two of which are located on both sides of the clamping assembly, with a striking assembly on the mounting plates for striking the sides of the steering gear housing. This utility model meets the needs of durability testing of steering gears under different operating conditions, making the test results more realistic and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts testing technology, and in particular relates to a testing device for automotive steering systems. Background Technology

[0002] The function of a steering gear is to appropriately transform the steering torque and steering angle from the steering wheel (mainly by reducing speed and increasing torque) and then output it to the steering tie rod mechanism, thereby turning the car. Therefore, a steering gear is essentially a speed reduction transmission device. There are various types of steering gears, such as rack and pinion, recirculating ball, worm gear crank pin, and power steering. Automotive steering gears need to be tested before leaving the factory. Generally, a hydraulic system and a servo motor system are used to simulate the actual working conditions of the steering gear, allowing for durability, reliability, and testing of multiple performance parameters. Existing test benches only perform simple steering drive during rotational durability testing. However, actual cars encounter different road conditions, causing vibrations. This invention aims to provide a technical solution that can simulate vibration conditions during the rotational durability test of the steering gear, thus making the test results more reliable. Utility Model Content

[0003] Based on the above background, the purpose of this utility model is to provide a detection device for automobile steering systems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A testing device for an automobile steering gear includes a test bench; the test bench is provided with a clamping assembly for fixing the steering gear.

[0006] The test bench is equipped with a first support, and a steering drive device is mounted on the first support. The steering drive device is connected to the rotation shaft of the steering gear and provides power for the rotation of the steering gear.

[0007] The test bench is equipped with tension and compression sensors. Two tension and compression sensors are connected to both ends of the steering gear to simulate load and detect the axial pressure at both ends of the steering gear.

[0008] A support assembly is slidably mounted on the test bench. The support assembly is located below the clamping assembly and is used to limit the position of the clamping assembly.

[0009] The test bench is equipped with a vibration component, which is connected to the clamping component and is used to drive the clamping component to vibrate longitudinally.

[0010] The test bench is rotatably equipped with mounting plates, and two mounting plates are located on both sides of the clamping assembly. The mounting plates are equipped with a hammering assembly for hammering the side of the steering gear housing.

[0011] Furthermore, the clamping assembly includes a lower fixing block and an upper fixing block, wherein the lower fixing block is disposed on the support assembly;

[0012] The middle position of the lower fixing block and the upper fixing block is arc-shaped and corresponds to the housing of the steering gear;

[0013] The two ends of the lower fixing block and the upper fixing block are detachably connected by fastening bolts.

[0014] Furthermore, the support assembly includes a first support block, which is slidably disposed on the top of the test bench;

[0015] A limiting block is provided on the upper end of one side of the two first support blocks. The limiting block is U-shaped, and the middle open end of the limiting block is engaged with the end of the lower fixing block.

[0016] A second support block is provided at the lower end of one side of the two first support blocks opposite each other. The end of the second support block closer to the first support block is rectangular, and the end farther away from the first support block is arc-shaped, and the arc shape corresponds to the bottom arc-shaped surface of the lower fixed block.

[0017] Furthermore, a plurality of third support blocks are provided on one side opposite to the two second support blocks, and the third support blocks on the two second support blocks are interlocked and connected accordingly.

[0018] Furthermore, the test bench is provided with a rotating groove, and a threaded rod is rotatably mounted in the rotating groove, with the threads at both ends of the threaded rod having opposite directions;

[0019] The rotating groove has sliders slidably disposed at both ends, and the sliders are threadedly connected to the threaded rod.

[0020] The slider is connected to the first support block;

[0021] The test bench is equipped with a first motor on its side, and the output end of the first motor is connected to a threaded rod.

[0022] Furthermore, the vibration assembly includes a slide bar, which is T-shaped and fixedly mounted on the top of the test bench;

[0023] The sliding rod passes through both ends of the lower fixed block and is slidably connected to the lower fixed block;

[0024] The four sliding rods are symmetrically arranged at both ends of the lower fixed block;

[0025] A first spring is sleeved on the side of the slide rod, and the first spring is located below both ends of the lower fixing block;

[0026] The test bench is provided with a mounting block on top, and a first push block is eccentrically rotatably provided on the mounting block. The first push block is cylindrical and is located on one side of the lower fixed block.

[0027] The mounting block is equipped with a second motor, which is eccentrically connected to the first push block.

[0028] Furthermore, the end of the mounting plate furthest from the lower fixing block is rotatably connected to the test bench via a rotating shaft;

[0029] The test bench is equipped with a cylinder, and the output end of the cylinder is connected to the bottom of the mounting plate.

[0030] Furthermore, the striking assembly includes a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate arranged in sequence, wherein the first connecting plate is fixedly mounted on the mounting plate and is located on the end of the mounting plate away from the lower fixing block;

[0031] The first connecting plate is provided with a connecting frame, the connecting frame is provided with a third motor, and the connecting frame is rotatably provided with a second push block. The second push block is cylindrical, and the third motor is coaxially connected to the second push block.

[0032] The second push block is eccentrically rotatably connected to a connecting rod on its side, and the other end of the connecting rod is rotatably connected to the second connecting plate.

[0033] A first adjusting rod is symmetrically connected to the first connecting plate. The first adjusting rod passes through the second connecting plate and the third connecting plate and is connected to the side of the third connecting plate. The first adjusting rod is slidably connected to both the second connecting plate and the third connecting plate.

[0034] A second spring is sleeved on the side of the first adjusting rod, and the second spring is located between the second connecting plate and the third connecting plate;

[0035] The second connecting plate is symmetrically connected with a second adjusting rod. The cross-section of the second adjusting rod is T-shaped, and one end of the protrusion of the second adjusting rod passes through and extends out of the third connecting plate. The second adjusting rod is slidably connected to the third connecting plate.

[0036] A third spring is sleeved on the side of the second adjusting rod, and the third spring is located on the side of the third connecting plate near the lower fixed block;

[0037] A third adjusting rod is coaxially provided on the third connecting plate. One end of the third adjusting rod passes through the fourth connecting plate and is connected to a striking hammer. The third adjusting rod is slidably connected to the fourth connecting plate.

[0038] This utility model has the following beneficial effects:

[0039] 1. When conducting a steering durability test on the steering gear, the vibration component drives the clamping component to vibrate up and down, thereby causing the steering gear to move up and down, simulating the up and down shaking of a car. The striking component strikes the steering gear housing, and as the mounting plate rotates, it can strike the steering gear at different angles, simulating the situation when the steering gear is subjected to external impact. This meets the needs of durability testing of the steering gear under different working conditions, making the test results more realistic and reliable.

[0040] 2. Place the steering gear into the arc-shaped inner groove of the lower fixing block, and then connect the two ends of the upper fixing block to the lower fixing block with fastening bolts to complete the fixing of the steering gear.

[0041] 3. The third support block is cross-connected, which makes the ends of the second support block better connected, thus providing better support for the bottom of the lower fixed block. The limiting block on the first support block limits and fixes the two sides of the lower fixed block to prevent the lower fixed block from shaking under the action of the vibration component. The steering gear can be tested under normal conditions. When it is necessary to simulate the shaking condition, the first motor drives the threaded rod to rotate, so that the two second support blocks move in opposite directions under the action of the slider, no longer supporting and limiting the lower fixed block. At this time, the vibration component is started, which can simulate the performance test of the steering gear under the shaking condition.

[0042] 4. The second motor drives the first push block to rotate, thereby generating downward pressure on the end of the lower fixed block. When the first push block rotates eccentrically to disengage from the lower fixed block, the elastic force of the first spring after compression causes the lower fixed block to sway up and down, thereby driving the steering gear to move up and down.

[0043] 5. The cylinder drives the mounting plate to rotate, enabling the striking component to strike the steering gear at different angles. The third motor drives the second push block to rotate, which in turn drives the second connecting plate to move via the connecting rod. The first and second adjusting rods then drive the third and fourth connecting plates, the third adjusting rod, and the striking hammer to move. As the hammer moves toward the steering gear housing, the second and third springs exert their elastic force to strike the steering gear housing, thus simulating the external impact condition of the steering gear. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0046] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0047] Figure 3 For the present utility model Figure 1 A magnified structural diagram at point A;

[0048] Figure 4 For the present utility model Figure 2 A magnified structural diagram at point B;

[0049] Figure 5 This is a three-dimensional structural diagram of the support component of this utility model;

[0050] Figure 6 This is a three-dimensional structural diagram of the striking component of this utility model.

[0051] Among them: 1. Test bench; 11. First support; 12. Mounting plate; 13. Rotating groove; 14. Cylinder;

[0052] 2. Steering drive unit;

[0053] 3. Tension / compression sensor;

[0054] 4. Clamping assembly; 41. Lower fixing block; 42. Upper fixing block;

[0055] 5. Support assembly; 51. First support block; 52. Second support block; 53. Third support block; 54. Limiting block; 55. Threaded rod; 56. Slider; 57. First motor;

[0056] 6. Vibration assembly; 61. Slide bar; 62. First spring; 63. Mounting block; 64. First push block; 65. Second motor;

[0057] 7. Striking assembly; 71. First connecting plate; 72. Second connecting plate; 73. Third connecting plate; 74. Fourth connecting plate; 75. Connecting frame; 76. Third motor; 77. Second push block; 78. Connecting rod; 79. First adjusting rod; 710. Second spring; 711. Second adjusting rod; 712. Third spring; 713. Third adjusting rod; 714. Striking hammer;

[0058] 9. Steering gear. Detailed Implementation

[0059] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0060] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0061] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0062] like Figure 1-6 As shown, a testing device for an automotive steering gear includes a test bench 1; a clamping assembly 4 is provided on the test bench 1 for fixing the steering gear 9; a first bracket 11 is provided on the test bench 1, and a steering drive device 2 is provided on the first bracket 11. The steering drive device 2 is connected to the rotation shaft of the steering gear 9, providing power for the rotation of the steering gear 9. The connection can be made through a universal joint or other structure, allowing for a certain amount of elastic space in the connection between the steering drive device 2 and the steering gear 9. When simulating vibration conditions of the steering gear 9, there will be no external force interference due to vibration amplitude, which would affect the drive rotation. Tension and compression sensors 3 are provided on the test bench 1, and two tension and compression sensors 3 are connected to both ends of the steering gear 9 to simulate load and detect the axial pressure at both ends of the steering gear 9. Both the device 2 and the tension / compression sensor 3 are mature existing technologies, such as the steering durability test bench 1 of Best (model SP-02-04XX) and the steering drive device 2 and tension / compression sensor 3 of the comprehensive performance test bench 1 of Beiyue Machinery's steering gear 9. They are all electrically connected to the controller and displayed on the screen. The controller and the screen are not shown in the figure, so they will not be described in detail. A support component 5 is slidably provided on the test bench 1. The support component 5 is located below the clamping component 4 and is used to limit the clamping component 4. A vibration component 6 is provided on the test bench 1. The vibration component 6 is connected to the clamping component 4 and is used to drive the clamping component 4 to vibrate longitudinally. A mounting plate 12 is rotatably provided on the test bench 1. Two mounting plates 12 are located on both sides of the clamping component 4. A striking component 7 is provided on the mounting plate 12 and is used to strike the side of the steering gear 9 housing.

[0063] Furthermore, the clamping assembly 4 includes a lower fixing block 41 and an upper fixing block 42. The lower fixing block 41 is disposed on the support assembly 5 and is movably connected. The support assembly 5 can be detached from the bottom of the lower fixing block 41. The middle position of the lower fixing block 41 and the upper fixing block 42 is arc-shaped, in the form of a clamp, corresponding to the housing of the steering gear 9. The two ends of the lower fixing block 41 and the upper fixing block 42 are detachably connected by fastening bolts. The two ends of the upper fixing block 42 are connected to the lower fixing block 41 by fastening bolts. The arc shape can fit against the side of the housing of the steering gear 9, thereby completing the fixation of the steering gear 9.

[0064] Furthermore, the support assembly 5 includes a first support block 51, which is slidably mounted on the top of the test bench 1. A limiting block 54 is provided on the upper end of one of the two opposing first support blocks 51. The limiting block 54 is U-shaped, and its central open end is engaged with the end of the lower fixed block 41. The two ends of the lower fixed block 41 are rectangular, which can be engaged with the central groove of the limiting block 54, thereby limiting the lower fixed block 41. This ensures that the lower fixed block 41 is static during normal operating condition simulation, allowing for performance testing of the steering gear 9. A second support block 52 is provided on the lower end of one of the opposing first support blocks 51. The end of the second support block 52 closest to the first support block 51 is rectangular, and the end furthest from the first support block 51 is arc-shaped, with the arc corresponding to the bottom arc surface of the lower fixed block 41. Multiple third support blocks 53 are provided on one of the opposing second support blocks 52, and these third support blocks 53 on the two second support blocks 52 are staggered and interlocked. The third support block 53 on one second support block 52 is offset from the third support block 53 on the other second support block 52. Therefore, when the two second support blocks 52 approach each other, the corresponding third support blocks 53 are spliced ​​and inserted into each other, providing better support for the lower fixed block 41. The test bench 1 is provided with a rotating groove 13, in which a threaded rod 55 is rotatably mounted. The threads at both ends of the threaded rod 55 are opposite in direction. Sliding sliders 56 are slidably mounted at both ends of the rotating groove 13. The sliders 56 are threadedly connected to the threaded rod 55. The sliders 56 are connected to the first support block 51. A first motor 57 is provided on the side of the test bench 1. The output end of the first motor 57 is connected to the threaded rod 55. When it is necessary to simulate a shaking condition, the first motor 57 drives the threaded rod 55 to rotate. Thus, under the action of the sliders 56, the two second support blocks 52 move in opposite directions and no longer support or limit the lower fixed block 41. At this time, the vibration component 6 is activated, which can simulate the performance test of the steering gear 9 under shaking conditions.

[0065] Furthermore, the vibration assembly 6 includes a slide rod 61, which is T-shaped and fixedly mounted on the top of the test bench 1. The slide rod 61 passes through both ends of the lower fixed block 41 and is slidably connected to the lower fixed block 41. Four slide rods 61 are symmetrically arranged at both ends of the lower fixed block 41. A first spring 62 is sleeved on the side of the slide rod 61 and is located below both ends of the lower fixed block 41. A mounting block 63 is provided on the top of the test bench 1. A first push block 64 is eccentrically mounted on the mounting block 63. The first push block 64 is cylindrical and is located on one side of the lower fixed block 41. When the first push block 64 rotates, it can press down on the top of the lower fixed block 41. When the pressure reaches a certain level, the first push block 64 will detach from the top of the lower fixed block 41 due to its eccentric setting, thereby achieving vibration. A second motor 65 is provided on the mounting block 63. The second motor 65 is eccentrically connected to the first push block 64 to achieve the rotation of the first push block 64.

[0066] Furthermore, the end of the mounting plate 12 away from the lower fixed block 41 is rotatably connected to the test bench 1 via a rotating shaft; the test bench 1 is equipped with a cylinder 14, the output end of which is connected to the bottom of the mounting plate 12; the striking assembly 7 includes a first connecting plate 71, a second connecting plate 72, a third connecting plate 73, and a fourth connecting plate 74 arranged sequentially; the first connecting plate 71 is fixedly mounted on the mounting plate 12 and located at the end of the mounting plate 12 away from the lower fixed block 41; the first connecting plate 71 is equipped with a connecting frame 75, the connecting frame 75 is equipped with a third motor 76, and the connecting frame 75 is rotatably equipped with a second push block 77, which is cylindrical, and the third motor 76 is coaxially connected to the second push block 77; the side of the second push block 77 is eccentrically rotatably connected to a connecting rod 78, the other end of which is rotatably connected to the second connecting plate 72; the first adjusting rod 79 is symmetrically connected to the first connecting plate 71, and the first adjusting rod 79 passes through the second connecting plate 72. The first adjusting rod 79 is slidably connected to both the second and third connecting plates 72 and 73. A second spring 710 is sleeved on the side of the first adjusting rod 79 and is located between the second and third connecting plates 72 and 73. A second adjusting rod 711 is symmetrically connected to the second connecting plate 72. The cross-section of the second adjusting rod 711 is T-shaped, and one end of the protrusion of the second adjusting rod 711 passes through and extends out of the third connecting plate 73. The second adjusting rod 711 is slidably connected to the third connecting plate 73. A third spring 712 is sleeved on the side of the second adjusting rod 711 and is located on the side of the third connecting plate 73 near the lower fixing block 41. A third adjusting rod 713 is coaxially provided on the third connecting plate 73. One end of the third adjusting rod 713 passes through the fourth connecting plate 74 and is connected to a striking hammer 714. The third adjusting rod 713 is slidably connected to the fourth connecting plate 74.

[0067] The working principle of this utility model is as follows: The middle position of the steering gear 9 is placed on the lower fixed block 41, and both ends of the steering gear 9 are connected to the tension and compression sensors 3 at both ends. Then, the upper fixed block 42 is connected to the lower fixed block 41 by fastening bolts, thereby completing the fixation of the steering gear 9. The steering drive device 2 is connected to the rotation shaft of the steering gear 9. When it is necessary to perform a static steering endurance test on the steering gear 9, the support component 5 is placed in a limited position on the clamping component 4. When it is necessary to simulate a vibration state, the first motor 57 drives the threaded rod 55 to rotate, causing the two sliders 56 to move in opposite directions, thereby releasing the limiting block 54 of the first support block 51 from limiting the lower fixed block 41, and releasing the support of the bottom of the lower fixed block 41 by the second support block 52 and the third support block 53. Then, the vibration component 6 is started, and the second motor 65 drives the first push block 64 to rotate. When block 64 presses down on fixed block 41, it compresses the first spring 62. When the first push block 64 disengages from the lower fixed block 41, the lower fixed block 41 vibrates up and down due to the elastic force of the first spring 62 and the limiting position of slide rod 61, causing the steering gear 9 to vibrate up and down. When it is necessary to simulate the external impact state, the third motor 76 provides power through the second push block 77 and connecting rod 78. Through the first adjusting rod 79 and the second adjusting rod 711, it drives the third connecting plate 73, the fourth connecting plate 74, the third adjusting rod 713 and the hammer 714 to move. When moving towards the steering gear 9 housing, the hammer 714 strikes the steering gear 9 housing through the elastic force of the second spring 710 and the third spring 712. The cylinder 14 drives the mounting plate 12 to rotate, which can realize the striking component 7 striking the steering gear 9 at different angles, making the test results more realistic.

[0068] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A testing device for an automobile steering system, comprising a test bench (1), characterized in that: The test bench (1) is equipped with a clamping assembly (4) for fixing the steering gear (9); The test bench (1) is provided with a first support (11), and the first support (11) is provided with a steering drive device (2). The steering drive device (2) is connected to the rotation shaft of the steering gear (9) to provide power for the rotation of the steering gear (9). The test bench (1) is equipped with tension and compression sensors (3), and the two tension and compression sensors (3) are connected to both ends of the steering gear (9); The test bench (1) is slidably provided with a support component (5), which is located below the clamping component (4) and is used to limit the clamping component (4); The test bench (1) is provided with a vibration assembly (6), which is connected to the clamping assembly (4) and is used to drive the clamping assembly (4) to vibrate longitudinally. The test bench (1) is rotatably provided with mounting plates (12), and two mounting plates (12) are provided on both sides of the clamping assembly (4). The mounting plates (12) are provided with a hammering assembly (7) for hammering the side of the steering gear (9) housing.

2. The detection device for automobile steering gear according to claim 1, characterized in that: The clamping assembly (4) includes a lower fixing block (41) and an upper fixing block (42), wherein the lower fixing block (41) is disposed on the support assembly (5); The middle position of the lower fixing block (41) and the upper fixing block (42) is arc-shaped and corresponds to the housing of the steering gear (9); The two ends of the lower fixing block (41) and the upper fixing block (42) are detachably connected by fastening bolts.

3. The detection device for automobile steering gear according to claim 2, characterized in that: The support assembly (5) includes a first support block (51), which is slidably disposed on the top of the test bench (1). A limiting block (54) is provided on the upper end of one side of the two first support blocks (51). The limiting block (54) is U-shaped, and the middle open end of the limiting block (54) is correspondingly engaged with the end of the lower fixing block (41). A second support block (52) is provided at the lower end of one side of the two first support blocks (51). The end of the second support block (52) near the first support block (51) is rectangular, and the end away from the first support block (51) is arc-shaped, and the arc-shaped end corresponds to the bottom arc-shaped surface of the lower fixing block (41).

4. The detection device for automobile steering gear according to claim 3, characterized in that: Multiple third support blocks (53) are provided on one side opposite to the two second support blocks (52), and the third support blocks (53) on the two second support blocks (52) are interlocked.

5. The detection device for automobile steering gear according to claim 4, characterized in that: The test bench (1) is provided with a rotating groove (13), and a threaded rod (55) is rotatably provided in the rotating groove (13), with the thread directions at both ends of the threaded rod (55) being opposite. The rotating groove (13) has sliders (56) slidably provided at both ends, and the sliders (56) are threadedly connected to the threaded rod (55); The slider (56) is connected to the first support block (51); The test bench (1) is equipped with a first motor (57) on its side, and the output end of the first motor (57) is connected to the threaded rod (55).

6. The detection device for automobile steering gear according to claim 2, characterized in that: The vibration assembly (6) includes a slide bar (61), which is T-shaped and fixedly mounted on the top of the test bench (1); The slide rod (61) passes through both ends of the lower fixing block (41) and is slidably connected to the lower fixing block (41); The four slide rods (61) are symmetrically arranged at both ends of the lower fixed block (41); The slide bar (61) is fitted with a first spring (62) on its side, and the first spring (62) is located below both ends of the lower fixing block (41); The test bench (1) is provided with a mounting block (63) on top. A first push block (64) is eccentrically rotated on the mounting block (63). The first push block (64) is cylindrical and is located on one side of the lower fixed block (41). The mounting block (63) is provided with a second motor (65), which is eccentrically connected to the first push block (64).

7. The detection device for automobile steering gear according to claim 2, characterized in that: The end of the mounting plate (12) away from the lower fixing block (41) is rotatably connected to the test bench (1) via a rotating shaft; The test bench (1) is equipped with a cylinder (14), and the output end of the cylinder (14) is connected to the bottom of the mounting plate (12).

8. The detection device for automobile steering gear according to claim 2, characterized in that: The striking assembly (7) includes a first connecting plate (71), a second connecting plate (72), a third connecting plate (73) and a fourth connecting plate (74) arranged in sequence. The first connecting plate (71) is fixedly mounted on the mounting plate (12) and is located on the mounting plate (12) at one end away from the lower fixing block (41). The first connecting plate (71) is provided with a connecting frame (75), the connecting frame (75) is provided with a third motor (76), and the connecting frame (75) is rotatably provided with a second push block (77). The second push block (77) is cylindrical, and the third motor (76) is coaxially connected with the second push block (77). The second push block (77) is eccentrically rotatably connected to a connecting rod (78) on its side, and the other end of the connecting rod (78) is rotatably connected to the second connecting plate (72); A first adjusting rod (79) is symmetrically connected to the first connecting plate (71). The first adjusting rod (79) passes through the second connecting plate (72) and the third connecting plate (73) and is connected to the side of the third connecting plate (73). The first adjusting rod (79) is slidably connected to both the second connecting plate (72) and the third connecting plate (73). The first adjusting rod (79) is fitted with a second spring (710) on its side, and the second spring (710) is located between the second connecting plate (72) and the third connecting plate (73); The second connecting plate (72) is symmetrically connected with a second adjusting rod (711). The cross-section of the second adjusting rod (711) is T-shaped, and one end of the protrusion of the second adjusting rod (711) passes through and extends out of the third connecting plate (73). The second adjusting rod (711) is slidably connected to the third connecting plate (73). The second adjusting rod (711) is fitted with a third spring (712) on its side, and the third spring (712) is located on the side of the third connecting plate (73) near the lower fixing block (41); A third adjusting rod (713) is coaxially provided on the third connecting plate (73). One end of the third adjusting rod (713) passes through the fourth connecting plate (74) and is connected to a hammer (714). The third adjusting rod (713) is slidably connected to the fourth connecting plate (74).

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