Steering gear torque detection device

Abstract

The utility model discloses a steering gear torque detection device, which is applied to the technical field of automobile performance testing, can avoid local deformation of a steering shaft caused by single-side pressure application through uniform distribution of clamping forces on two sides, reduces measurement errors caused by stress concentration in the testing process, and improves the testing accuracy. Synchronous clamping enables the steering shaft to be in a stable stress state during forward and reverse rotation tests, the synchronous clamping mechanisms on the two sides achieve automatic centering through mechanical limiting, clamping position deviation caused by manual adjustment is eliminated, clamping consistency of different batches of tests is guaranteed, and the length of a force arm of the steering gear can be accurately measured. The situation that the test result has errors due to uneven force application of manual test is avoided, the stable force application mechanism uniformly distributes clamping pressure, torque transmission distortion caused by local deformation of the steering shaft is avoided, parasitic torque generated by radial vibration and axial deviation is reduced, operation is simple, and production line detection efficiency and reliability are enhanced.

Description

A steering gear torque detection device Technical Field

[0001] This utility model belongs to the field of automotive performance testing technology, and specifically relates to a steering gear torque detection device. 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 them 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. Torque is a vector quantity, defined as the vector product of position and force. The dimension of torque is ML²T⁻², and its unit in the International System of Units (SI) is kg·m²·s⁻². Torque can change the angular momentum of an object, i.e., the rotational property of the object, or cause the object to twist. An object in equilibrium not only… When the force is zero, the torque is also zero. The concept of torque has wide applications in mechanics and engineering. The definition of "torque," an important parameter of automobile engines, uses this concept. Steering torque detection devices are devices for detecting steering torque. However, traditional steering torque detection devices, with unilateral clamping, are prone to uneven force on the steering shaft, forming local stress concentration and causing deformation, resulting in torque measurement drift. The measurement accuracy is reduced due to fluctuations caused by manual force application, and the repeatability is poor. It is difficult to capture high-frequency torque changes in dynamic testing, leading to data distortion. In order to solve the problems mentioned above, we propose a steering torque detection device. Summary of the Invention

[0003] The purpose of this utility model is to provide a steering gear torque detection device, which has the advantages of simultaneous clamping on both sides and uniform force application detection.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a steering gear torque detection device, including a base, a motor embedded in the rear end of the top of the base, a turntable fixedly sleeved at the top output end of the motor, connecting rods hinged to both sides of the bottom of the turntable, a moving block hinged to the far end of the bottom of the two connecting rods, a support rod bolted to the top of the moving block, a clamping plate bolted to the top of the support rod, limit buckles bolted to the four corners of the bottom of the moving block, a limit rod slidably sleeved inside the limit buckle, and the end of the limit rod near the base bolted to the front and rear ends of both sides of the base, and a force application mechanism provided in the middle of the top of the base.

[0005] The above technical solution is adopted as follows: the motor rotates to drive the turntable to rotate, the turntable rotates to drive the connecting rod to move, the connecting rod drives the moving block to move, the limit buckle and the limit rod limit the movement of the moving block, the moving block drives the support rod to move, the support rod drives the clamping plate to move, and the clamping force on both sides is evenly distributed, which can avoid local deformation of the steering shaft caused by unilateral pressure, reduce the measurement error caused by stress concentration during the test, and the synchronous clamping ensures that the steering shaft is in a stable force state during forward and reverse rotation tests. The synchronous clamping mechanism on both sides achieves automatic centering through mechanical limit, eliminates the clamping position deviation caused by manual adjustment, ensures the clamping consistency of different batches of tests, and can accurately measure the lever arm length of the steering gear.

[0006] The present invention is further configured such that the force-applying mechanism includes a C-frame, which is bolted to the middle of the top of the base. A threaded sleeve is slidably fitted through the front of the C-frame, and a screw is rotatably connected through the back of the C-frame. The front end of the screw surface is threadedly connected to the internal thread of the threaded sleeve. A cylinder is bolted to the front of the threaded sleeve, and a torque detector is fitted to the back of the screw.

[0007] The above technical solution employs a force-applying mechanism. The steering gear is inserted into the torque detector, and after the two sides of the steering gear are fitted and clamped by bearings, the cylinder extends and retracts, causing the threaded sleeve to move. This movement of the threaded sleeve causes the screw to rotate, which in turn rotates the torque detector. This avoids the uneven force application that can lead to errors in test results during manual testing. The stable force-applying mechanism evenly distributes clamping pressure, preventing torque transmission distortion caused by localized deformation of the steering shaft. It also reduces parasitic torque generated by radial vibration and axial offset. The operation is simple, enhancing production line testing efficiency and reliability.

[0008] The present invention is further configured such that a sliding rod is bolted to the bottom of the front and rear ends inside the C-frame, and a C-ring is slidably sleeved on the front and middle of the surface of the sliding rod, and the front end of the top of the C-ring is bolted to the rear end of the bottom of the threaded sleeve.

[0009] The above technical solution, by setting a sliding rod and a C-shaped buckle, can limit the movement of the threaded sleeve.

[0010] The present invention is further configured such that a bearing is sleeved inside the clamping plate.

[0011] The above technical solution utilizes a bearing to easily clamp the steering gear, preventing it from shifting when the steering gear rotates.

[0012] The present invention is further configured such that a spring is sleeved at the rear end of the slide bar surface.

[0013] The above technical solution involves incorporating a spring to apply a force to the movement of the screw sleeve, preventing it from moving too quickly and affecting the accuracy of the torque detection data.

[0014] The present invention is further configured such that a side plate is bolted to the end of the limiting rod away from the turntable.

[0015] The above technical solution utilizes a side plate to stabilize the limiting rod.

[0016] The present invention is further configured such that a base plate is bolted to the bottom of the base, and the two sides of the top rear end of the base plate are bolted to the bottom of the side plate.

[0017] The above technical solution, by setting a base plate, can stabilize the device.

[0018] The present invention is further configured such that a bracket is bolted to the front of the cylinder, and the bottom of the bracket is bolted to the front end of the top of the base.

[0019] The above technical solution uses a bracket to stabilize the cylinder.

[0020] In summary, this utility model has the following beneficial effects:

[0021] 1. This utility model avoids local deformation of the steering shaft caused by unilateral pressure by evenly distributing the clamping force on both sides, reduces measurement errors caused by stress concentration during testing, and ensures that the steering shaft is in a stable force state during both forward and reverse rotation tests by synchronous clamping. The synchronous clamping mechanism on both sides achieves automatic centering through mechanical limit, eliminates clamping position deviation caused by manual adjustment, ensures clamping consistency of different batches of tests, and can accurately measure the lever arm length of the steering gear.

[0022] 2. This utility model avoids errors in test results caused by uneven force application during manual testing. It stabilizes the force application mechanism and evenly distributes clamping pressure, avoids torque transmission distortion caused by local deformation of the steering shaft, reduces parasitic torque generated by radial vibration and axial offset, and is easy to operate, thus enhancing the efficiency and reliability of production line testing. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 is a partial front sectional view of the structure of this utility model;

[0025] Figure 3 is a top sectional view of the overall structure of this utility model;

[0026] Figure 4 is a partial structural side view of this utility model.

[0027] Reference numerals in the attached diagram: 1. Base; 2. Motor; 3. Turntable; 4. Connecting rod; 5. Moving block; 6. Support rod; 7. Clamping plate; 8. Limit buckle; 9. Limiting rod; 10. C-frame; 11. Screw sleeve; 12. Screw; 13. Cylinder; 14. Torque detector; 15. Slide rod; 16. C-ring; 17. Bearing; 18. Spring; 19. Side plate; 20. Base plate; 21. Bracket. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1:

[0030] Referring to Figures 1, 2, and 3, a steering gear torque detection device includes a base 1. A motor 2 is embedded in the rear end of the top of the base 1. A turntable 3 is fixedly sleeved at the top output end of the motor 2. Connecting rods 4 are hinged to both sides of the bottom of the turntable 3. Moving blocks 5 are hinged to the ends of the bottom of the two connecting rods 4 that are furthest apart. Support rods 6 are bolted to the top of the moving blocks 5. Clamping plates 7 are bolted to the top of the support rods 6. Limit buckles 8 are bolted to the four corners of the bottom of the moving blocks 5. Limiting rods 9 are slidably sleeved inside the limit buckles 8. The end of the limiting rods 9 near the base 1 is bolted to the front and rear ends of both sides of the base 1. A force-applying mechanism is provided in the middle of the top of the base 1. The rotation of the motor 2 drives the turntable 3 to rotate. The rotation of the turntable 3 drives the connecting rods 4 to move. The connecting rods 4 drive the moving blocks 5 to move. The limit buckles 8 and the limiting rods 9 limit the movement of the moving blocks 5. The moving blocks 5 drive the support rods 6 to move. The support rods 6 drive the clamping plates 7 to move. The clamping force on both sides is evenly distributed, which can avoid local deformation of the steering shaft caused by pressure on one side.

[0031] Referring to Figures 1 and 2, a bearing 17 is sleeved inside the clamping plate 7. By setting the bearing 17, the steering gear can be easily clamped, and the steering gear will not deviate when rotated.

[0032] Referring to Figures 1, 2, and 3, a side plate 19 is bolted to the end of the limiting rod 9 away from the turntable 3. By setting the side plate 19, the limiting rod 9 can be stabilized.

[0033] Referring to Figures 1, 2, and 3, a base plate 20 is bolted to the bottom of the base 1, and the two sides of the top rear end of the base plate 20 are bolted to the bottom of the side plate 19. By setting the base plate 20, the device can be stabilized.

[0034] Brief description of the usage process: Before testing the torque of the steering gear, insert the steering gear into the torque detector 14. The rotation of motor 2 drives the turntable 3 to rotate, which in turn drives the connecting rod 4 to move. The connecting rod 4 drives the moving block 5 to move. The limit buckle 8 and the limit rod 9 limit the movement of the moving block 5. The moving block 5 drives the support rod 6 to move, and the support rod 6 drives the clamping plate 7 to move. The two sides of the steering gear are fitted into the bearings 17. The clamping force on both sides is evenly distributed, which can avoid local deformation of the steering shaft caused by pressure on one side and reduce the measurement error caused by stress concentration during the test. The synchronous clamping ensures that the steering shaft is in a stable force state during forward and reverse rotation tests. The synchronous clamping mechanism on both sides achieves automatic centering through mechanical limit, eliminating the clamping position deviation caused by manual adjustment, ensuring the clamping consistency of different batches of tests, and accurately measuring the lever arm length of the steering gear.

[0035] Example 2:

[0036] Referring to Figures 1, 3, and 4, a steering gear torque detection device includes a force application mechanism comprising a C-frame 10, which is bolted to the center of the top of a base 1. A threaded sleeve 11 is slidably fitted through the front of the C-frame 10, and a screw 12 is rotatably connected through the back of the C-frame 10. The front end of the screw 12 is threadedly connected to the inside of the threaded sleeve 11. A cylinder 13 is bolted to the front of the threaded sleeve 11, and a torque detector 14 is fitted to the back of the screw 12. When the steering gear is inserted into the torque detector 14, and the two sides of the steering gear are fitted and clamped by bearings 17, the cylinder 13 extends and retracts, causing the threaded sleeve 11 to move. The movement of the threaded sleeve 11 causes the screw 12 to rotate, which in turn causes the torque detector 14 to rotate, thus avoiding uneven force application during manual testing.

[0037] Referring to Figure 4, a slide rod 15 is bolted to the bottom of the front and rear ends inside the C-frame 10. A C-ring 16 is slidably sleeved at the front and middle of the surface of the slide rod 15, and the front end of the top of the C-ring 16 is bolted to the rear end of the bottom of the threaded sleeve 11. By setting the slide rod 15 and the C-ring 16, the movement of the threaded sleeve 11 can be limited.

[0038] Referring to Figure 4, a spring 18 is sleeved on the rear end of the slide bar 15. By setting the spring 18, a force can be applied to the movement of the threaded sleeve 11 to prevent the threaded sleeve 11 from moving too fast and affecting the accuracy of the torque detection data.

[0039] Referring to Figures 1, 3, and 4, a bracket 21 is bolted to the front of the cylinder 13, and the bottom of the bracket 21 is bolted to the front end of the top of the base 1. By setting the bracket 21, the cylinder 13 can be stabilized.

[0040] Brief description of usage: When the torque of the steering gear needs to be tested, insert the steering gear into the torque detector 14. After the two sides of the steering gear are fitted and clamped by the bearings 17, the cylinder 13 extends and retracts, causing the threaded sleeve 11 to move. The slide rod 15 and the C-clamp 16 limit the movement of the threaded sleeve 11. The movement of the threaded sleeve 11 causes the screw 12 to rotate, which in turn causes the torque detector 14 to rotate. This avoids the error in test results caused by uneven force application during manual testing. The stable force application mechanism evenly distributes the clamping pressure, avoids torque transmission distortion caused by local deformation of the steering shaft, and reduces parasitic torque generated by radial vibration and axial offset. The operation is simple and enhances the testing efficiency and reliability of the production line.

[0041] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A steering torque detector device comprising a base (1), characterised in that: A motor (2) is embedded in the rear end of the top of the base (1). A turntable (3) is fixedly sleeved on the top output end of the motor (2). Connecting rods (4) are hinged on both sides of the bottom of the turntable (3). A moving block (5) is hinged to the bottom of the two connecting rods (4) at the far end. A support rod (6) is bolted to the top of the moving block (5). A clamp (7) is bolted to the top of the support rod (6). Limit buckles (8) are bolted to the four corners of the bottom of the moving block (5). A limit rod (9) is slidably sleeved inside the limit buckle (8). The end of the limit rod (9) near the base (1) is bolted to the front end and the rear end of both sides of the base (1). A force-applying mechanism is provided in the middle of the top of the base (1).

2. The steering gear torque detection device according to claim 1, characterized in that: The force-applying mechanism includes a C-frame (10), which is bolted to the middle of the top of the base (1). A threaded sleeve (11) is slidably fitted through the front of the C-frame (10), and a screw (12) is rotatably connected through the back of the C-frame (10). The front end of the surface of the screw (12) is threadedly connected to the inside of the threaded sleeve (11). A cylinder (13) is bolted to the front of the threaded sleeve (11), and a torque detector (14) is fitted to the back of the screw (12).

3. The steering gear torque detection device according to claim 2, characterized in that: The bottom of the front and rear ends of the C-frame (10) is bolted with a slide rod (15), and the front end and middle of the surface of the slide rod (15) are slidably sleeved with a C buckle (16), and the front end of the top of the C buckle (16) is bolted to the rear end of the bottom of the screw sleeve (11).

4. The steering gear torque detection device according to claim 1, characterized in that: The clamping plate (7) is fitted with a bearing (17).

5. A steering gear torque detection device according to claim 3, characterized in that: A spring (18) is sleeved on the rear end of the surface of the slide rod (15).

6. A steering gear torque detection device according to claim 1, characterized in that: The end of the limiting rod (9) away from the turntable (3) is bolted with a side plate (19).

7. A steering gear torque detection device according to claim 1, characterized in that: The bottom of the base (1) is bolted to the bottom plate (20), and the two sides of the top rear end of the bottom plate (20) are bolted to the bottom of the side plate (19).

8. A steering gear torque detection device according to claim 2, characterized in that: The cylinder (13) is bolted to the front of a bracket (21), and the bottom of the bracket (21) is bolted to the front end of the top of the base (1).

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