A universal test bench for steering gear stiffness test

Abstract

The present invention relates to the technical field of steering gear testing devices, and more specifically, to a universal test bench for steering gear stiffness testing. The test bench comprises a fixture fixing mechanism, a scaled rotary locking mechanism, an adjustable sample clamping mechanism, and a test platform. The fixture fixing mechanism is fixed to the test platform, and the fixture fixing mechanism and the adjustable sample clamping mechanism are connected by a scaled rotary locking mechanism. Compared with the prior art, the present invention designs a universal test bench for steering gear stiffness testing that can meet the requirements of axial and radial stiffness testing of input shafts and bushing stiffness testing of rack ends. It also facilitates sample assembly and disassembly, significantly reducing the time required for model changeovers, component replacements, and adjustments, thereby improving work efficiency and reducing workload.

Description

Technical Field

[0001] The invention relates to the technical field of steering gear testing devices, in particular to a universal testing bench for steering gear stiffness testing. Background Art

[0002] Current steering gear stiffness testing involves testing the axial and radial stiffness of the input shaft and the bushing stiffness of the rack end. These two tests are performed on two different test benches. Horizontal and vertical loads are applied on these two different test benches, and the steering gear's mounting angle is adjusted primarily by adjusting the ring fixture when switching between horizontal and vertical mounting positions.

[0003] However, the current ring fixture has no reference scale and can only be changed through repeated debugging, resulting in long change time and low efficiency, which cannot meet customer needs.

[0004] Therefore, it is necessary to design a universal test bench for steering gear stiffness test, which can realize rapid model change and sample replacement and improve test efficiency. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a universal test bench for steering gear stiffness testing, which can achieve rapid model change and sample replacement, thereby improving test efficiency.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a universal test bench for steering gear stiffness test, including a clamp fixing mechanism, a scaled rotary locking mechanism, an adjustment sample clamping mechanism, and an experimental platform. The clamp fixing mechanism is fixed on the experimental platform, and the clamp fixing mechanism and the adjustment sample clamping mechanism are connected by a scaled rotary locking mechanism.

[0007] The adjusting sample clamping mechanism includes a T-plate, a guide rail, a screw rod, a handwheel, a slider, a sliding fixed top plate, an upper shell positioning plate, a lower shell positioning plate, and a fixed plate assembly. The bottom of the T-plate is provided with a fixed plate assembly, and the surface of the fixed plate assembly is provided with a lower shell positioning plate. The lower end of the screw rod is connected to the fixed plate assembly, and the upper end of the screw rod is connected to the handwheel. A guide rail is installed on the front surface of the T-plate, and a slider is used to connect the guide rail and the sliding fixed top plate. The sliding fixed top plate and the screw rod are connected with a nut fixing seat. The surface of the sliding fixed top plate is provided with an upper shell positioning plate, and the steering machine sample is placed between the upper shell positioning plate and the lower shell positioning plate.

[0008] When the steering gear sample is subjected to the axial stiffness test of the input shaft, the sample clamping mechanism is rotated and adjusted so that the input shaft of the steering gear sample is perpendicular to the horizontal line; when the steering gear sample is subjected to the radial stiffness test of the input shaft, the sample clamping mechanism is rotated and adjusted so that the input shaft of the steering gear sample is adjusted to a horizontal position; when the steering gear sample is subjected to the rack end bushing stiffness test, the sample clamping mechanism is rotated and adjusted so that the rack of the steering gear sample is adjusted to a horizontal position.

[0009] The fixture fixing mechanism includes a T-shaped base plate, a platform fixing plate, a support column, and a reinforcing rib. The front surface of the T-shaped base plate is installed with a rotation locking mechanism, the rear surface of the T-shaped base plate is installed with a platform fixing plate and a support column, the platform fixing plate is installed on the top of the experimental platform, the support column is connected to the side of the experimental platform, and a reinforcing rib is installed between the platform fixing plate and the T-shaped base plate.

[0010] The scaled rotary locking mechanism includes a T-shaped slider 1, a scaled flange fixing plate, a nut fixing seat 2, a flange fixing plate, and a locking plate. The rear surface of the scaled flange fixing plate is installed with a T-shaped slider 1, and the T-shaped slider 1 is slidably connected to the T-shaped bottom plate of the clamp fixing mechanism. The nut fixing seat 2 is embedded in the through hole of the scaled flange fixing plate, and a locking plate is installed on the nut fixing seat 2. The flange fixing plate is sleeved on the outside of the locking plate, and the flange fixing plate is connected to the T-plate of the adjustment sample clamping mechanism.

[0011] The T-shaped plate is equipped with a limiting column.

[0012] The fixing plate assembly includes a positioning fixing plate and a reinforcing plate. The positioning fixing plate is installed on the surface of the reinforcing plate. The surface of the positioning fixing plate is provided with a lower shell positioning plate. A reinforcing rib 2 is installed between the positioning fixing plate and the T-shaped plate. After the screw rod passes through the positioning fixing plate, it is connected to the reinforcing plate with a bearing.

[0013] The sample auxiliary fixing mechanism is installed on the T-plate, and the sample auxiliary fixing mechanism clamps the middle part of the steering gear sample.

[0014] The sample auxiliary fixing mechanism includes a T-shaped slider 2, an adjustment base, a locking nut, an adjustable support column, an adjustable fixing plate, a connecting plate, and a tightening bolt. The T-shaped slider 2 is installed on the rear surface of the adjustment base, and the T-shaped slider 2 is slidably connected to the T-shaped plate. The adjustment base is straddled on the screw rod, and the front surface of the adjustment base is installed with an adjustable support column. The adjustable support column and the adjustable fixing plate are connected with a locking nut. A connecting plate is respectively provided at both ends of the adjustable fixing plate, and tightening bolts are installed on the connecting plate. The two tightening bolts are against the middle of the steering gear sample.

[0015] Compared with the existing technology, the present invention designs a universal test bench for steering gear stiffness test, which can meet the needs of axial and radial stiffness test of input shaft and bushing stiffness test of rack end. The disassembly and assembly of samples are more convenient, which greatly reduces the time for changing models, replacing parts and adjusting, improves work efficiency and reduces work intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an axonometric drawing of the present invention.

[0017] Figure 2 It is an axonometric view of the clamp fixing mechanism of the present invention.

[0018] Figure 3 This is an exploded view of the clamp fixing mechanism of the present invention.

[0019] Figure 4 This is an axonometric view of the graduated rotation locking mechanism of the present invention.

[0020] Figure 5 This is an exploded view of the graduated rotation locking mechanism of the present invention.

[0021] Figure 6 This is an axonometric view of the sample clamping mechanism for adjusting the sample according to the present invention.

[0022] Figure 7 This is an axonometric view of the auxiliary fixing mechanism of the sample of the present invention.

[0023] Figure 8 This is an exploded view of the sample auxiliary fixing mechanism of the present invention.

[0024] Figure 9 This is a schematic diagram of the present invention performing a steering gear input shaft axial stiffness test.

[0025] Figure 10 This is a schematic diagram of the steering gear input shaft radial stiffness test performed according to the present invention.

[0026] Figure 11 This is a schematic diagram of the present invention in the steering rack end bushing stiffness test. DETAILED DESCRIPTION

[0027] The present invention will now be further described with reference to the accompanying drawings.

[0028] See also Figure 1 The present invention provides a universal test bench for steering gear stiffness test, including a clamp fixing mechanism 1, a scaled rotary locking mechanism 2, an adjustment sample clamping mechanism 3, a sample auxiliary fixing mechanism 4, and an experimental platform 5. The clamp fixing mechanism 1 is fixed on the experimental platform 5, and the clamp fixing mechanism 1 and the adjustment sample clamping mechanism 3 are connected by a scaled rotary locking mechanism 2.

[0029] See also Figure 6 The adjusting sample clamping mechanism 3 includes a T-plate 31, a guide rail 32, a screw rod 33, a handwheel 34, a slider 35, a sliding fixed top plate 36, an upper shell positioning plate 37, a lower shell positioning plate 38, and a fixed plate assembly 39. A fixed plate assembly 39 is provided at the bottom of the T-plate 31, and a lower shell positioning plate 38 is provided on the surface of the fixed plate assembly 39. The lower end of the screw rod 33 is connected to the fixed plate assembly 39, and the upper end of the screw rod 33 is connected to the handwheel 34. A guide rail 32 is installed on the front surface of the T-plate 31, and a slider 35 is used to connect the guide rail 32 and the sliding fixed top plate 36. The sliding fixed top plate 36 and the screw rod 33 are connected by a nut fixing seat. The surface of the sliding fixed top plate 36 is provided with an upper shell positioning plate 37. The sample auxiliary fixing mechanism 4 is installed on the T-plate 31, and the steering machine sample 6 is placed between the upper shell positioning plate 37 and the lower shell positioning plate 38. The sample auxiliary fixing mechanism 4 clamps the middle part of the steering machine sample 6.

[0030] Limiting posts are installed on the T-shaped plate 31 to limit the position of the sliding fixed top plate 36.

[0031] The fixing plate assembly 39 includes a positioning fixing plate and a reinforcing plate. The positioning fixing plate is installed on the surface of the reinforcing plate. The surface of the positioning fixing plate is provided with a lower shell positioning plate 38. A reinforcing rib 2 is installed between the positioning fixing plate and the T-shaped plate 31. After the screw rod 33 passes through the positioning fixing plate, it is connected to the reinforcing plate with a bearing.

[0032] See also Figure 2 、 3 The fixture fixing mechanism 1 includes a T-shaped base plate 11, a platform fixing plate 12, a support column 13, and a reinforcing rib 14. The front surface of the T-shaped base plate 11 is installed with a rotation locking mechanism 2, and the rear surface of the T-shaped base plate 11 is installed with a platform fixing plate 12 and a support column 13. The platform fixing plate 12 is installed on the top of the experimental platform 5, and the support column 13 is connected to the side of the experimental platform 5. A reinforcing rib 14 is installed between the platform fixing plate 12 and the T-shaped base plate 11.

[0033] See also Figure 4 、 5 The graduated rotary locking mechanism 2 includes a T-shaped slider 21, a graduated flange fixing plate 22, a second nut fixing seat 23, a flange fixing plate 24, and a locking plate 25. The rear surface of the graduated flange fixing plate 22 is mounted with a T-shaped slider 21, which is slidably connected to the T-shaped base plate 11 of the fixture fixing mechanism 1. The second nut fixing seat 23 is embedded in the through hole of the graduated flange fixing plate 22. The locking plate 25 is mounted on the second nut fixing seat 23. The flange fixing plate 24 is sleeved outside the locking plate 25 and is connected to the T-shaped plate 31 of the sample clamping mechanism 3. The graduated rotary locking mechanism 2 can adjust the distance between the steering gear sample 6 and the measuring device.

[0034] See also Figure 7 、 8 The sample auxiliary fixing mechanism 4 includes a T-shaped slider 41, an adjustment base 42, a locking nut 43, an adjustable support column 44, an adjustable fixing plate 45, a connecting plate 46, and a tightening bolt 47. The T-shaped slider 41 is installed on the rear surface of the adjustment base 42, and the T-shaped slider 41 is slidably connected to the T-shaped plate 31. The adjustment base 42 is straddled on the screw rod 33. The front surface of the adjustment base 42 is installed with an adjustable support column 44. The adjustable support column 44 and the adjustable fixing plate 45 are connected with a locking nut 43. A connecting plate 46 is provided at each end of the adjustable fixing plate 45, and a tightening bolt 47 is installed on the connecting plate 46. The two tightening bolts 47 are against the middle of the steering gear sample 6.

[0035] The present invention utilizes the existing experimental platform 5, fully utilizes the space, and the overall rigidity of the fixture is high. The present invention vertically connects and fixes the fixture fixing mechanism 1 to the experimental platform 5, fully utilizes the space, and ensures the overall rigidity of the fixture during testing.

[0036] When the axial stiffness test of the input shaft is required, in the sample clamping mechanism 3, loosen the four fixing bolts between the sliding fixed top plate 36 and the T-plate 31, rotate the handle 34, and install the steering gear sample 6 in the upper shell positioning plate 37 and the lower shell positioning plate 38. Rotate the handle 34 to press the two ends of the steering gear sample 6 shell, tighten the four fixing bolts between the sliding fixed top plate 36 and the T-plate 31, and complete the installation of the steering gear sample 6. Loosen the connecting bolts between the flange fixing plate 24 and the T-plate 31, and rotate the sample clamping mechanism 3 to ensure the angular adjustment of the measurement position. At the same time, the flange fixing plate 22 with scale makes the angular position adjustment more precise, ensuring the measurement accuracy. Figure 9 When testing the axial stiffness of the steering gear input shaft, the sample clamping mechanism 3 is rotated and adjusted to make the input shaft of the steering gear sample 6 perpendicular to the horizontal line. A force sensor and a displacement sensor are connected in series through a gear rack vertical force application device on the experimental platform 5 to measure the end face displacement of the steering gear input shaft. By applying a tensile force F to the steering gear input shaft, the displacement is measured and the axial stiffness of the input shaft is calculated.

[0037] When the radial stiffness test of the input shaft is required, loosen the connecting bolts between the flange fixing plate 24 and the T-plate 31, and rotate and adjust the sample clamping mechanism 3. Figure 10 When testing the radial stiffness of the steering gear input shaft, the sample clamping mechanism 3 is rotated and adjusted to adjust the input shaft of the steering gear sample 6 to a horizontal position. A force sensor and a displacement sensor are connected in series through a gear rack vertical force application device on the experimental platform 5. The vertical displacement of the steering gear input shaft is measured by applying a tensile force F to the steering gear input shaft, and the radial stiffness of the input shaft is calculated.

[0038] When the rack end bushing stiffness test is required, loosen the connecting bolts between the flange fixing plate 24 and the T-plate 31, and rotate and adjust the sample clamping mechanism 3. Figure 11 When testing the stiffness of the steering rack end bushing, the sample clamping mechanism 3 is rotated and adjusted to adjust the rack of the steering sample 6 to a horizontal position. A force sensor and a displacement sensor are connected in series through a gear rack vertical force device on the experimental platform 5 to measure the vertical displacement of the steering rack. By applying a tensile force F to the steering rack, the displacement is measured and the stiffness of the steering rack end bushing is calculated.

[0039] When the steering gear sample 6 model needs to be replaced, the upper shell positioning plate 37 and the lower shell positioning plate 38 only need to be replaced to achieve rapid model change and improve model change efficiency.

[0040] To accommodate different types of steering gears, the auxiliary sample fixing mechanism 4 can be adjusted based on the product's mounting method. Steering gears can be mounted on the vehicle chassis at two or three points. Using the auxiliary sample fixing mechanism 4, a three-point fixation method can be achieved, ensuring the accuracy of test data.

[0041] The present invention integrates the axial and radial stiffness tests of the input shaft and the bushing stiffness test of the rack end into a test bench. For different steering gears, it is only necessary to replace the upper shell positioning plate 37 and the lower shell positioning plate 38 to achieve rapid model change. Loosen the connecting bolts between the flange fixing plate 24 and the T-plate 31, and the sample clamping mechanism 3 can be rotated to adjust the angle of the measuring position. At the same time, the flange fixing plate 22 with a scale makes the angle position adjustment more precise and ensures measurement accuracy. Loosen the four fixing bolts between the sliding fixed top plate 36 and the T-plate 31, and rotate the handle 34 to achieve rapid replacement of the steering gear sample 6. The disassembly and assembly of the steering gear sample 6 is more convenient, which greatly reduces the time for model change, part replacement and adjustment, and improves work efficiency.

Claims

1. A universal test bench for a steering gear stiffness test, comprising a fixture fixing mechanism (1), a scaled rotation locking mechanism (2), an adjustable sample clamping mechanism (3), and an experimental platform (5), characterized in that: The fixture fixing mechanism (1) is fixed on the experimental platform (5), and the fixture fixing mechanism (1) is connected to the sample clamping mechanism (3) by a scaled rotation locking mechanism (2). The sample clamping mechanism (3) includes a T-plate (31), a guide rail (32), a screw (33), a hand wheel (34), a slider (35), a sliding fixed top plate (36), an upper shell positioning plate (37), a lower shell positioning plate (38), and a fixed plate assembly (39). The bottom of the T-plate (31) is provided with a fixed plate assembly (39), and the surface of the fixed plate assembly (39) is provided with a lower shell. The body positioning plate (38), the lower end of the screw rod (33) is connected to the fixed plate assembly (39), the upper end of the screw rod (33) is connected to the hand wheel (34), the front surface of the T-shaped plate (31) is installed with a guide rail (32), the guide rail (32) and the sliding fixed top plate (36) are connected by a slider (35), the sliding fixed top plate (36) and the screw rod (33) are connected by a nut fixing seat, the surface of the sliding fixed top plate (36) is provided with an upper housing positioning plate (37), and the steering machine sample (6) is placed between the upper housing positioning plate (37) and the lower housing positioning plate (38); When the steering gear sample (6) is subjected to an axial stiffness test of the input shaft, the sample clamping mechanism (3) is rotated and adjusted so that the input shaft of the steering gear sample (6) is perpendicular to the horizontal line; when the steering gear sample (6) is subjected to a radial stiffness test of the input shaft, the sample clamping mechanism (3) is rotated and adjusted so that the input shaft of the steering gear sample (6) is adjusted to a horizontal position; when the steering gear sample (6) is subjected to a rack end bushing stiffness test, the sample clamping mechanism (3) is rotated and adjusted so that the rack of the steering gear sample (6) is adjusted to a horizontal position; The scaled rotary locking mechanism (2) comprises a T-shaped slider (21), a scaled flange fixing plate (22), a nut fixing seat (23), a flange fixing plate (24), and a locking plate (25). The rear surface of the scaled flange fixing plate (22) is provided with a T-shaped slider (21). The T-shaped slider (21) is slidably connected to the T-shaped bottom plate (11) of the fixture fixing mechanism (1). The nut fixing seat (23) is embedded in the through hole of the scaled flange fixing plate (22). The locking plate (25) is installed on the nut fixing seat (23). The flange fixing plate (24) is sleeved outside the locking plate (25). The flange fixing plate (24) is connected to the T-plate (31) of the sample adjustment clamping mechanism (3).

2. The universal test bench for steering gear stiffness test according to claim 1, characterized in that: The fixture fixing mechanism (1) includes a T-shaped base plate (11), a platform fixing plate (12), a support column (13), and a reinforcing rib (14). The front surface of the T-shaped base plate (11) is installed with a rotation locking mechanism (2), the rear surface of the T-shaped base plate (11) is installed with a platform fixing plate (12) and a support column (13), the platform fixing plate (12) is installed on the top of the experimental platform (5), the support column (13) is connected to the side of the experimental platform (5), and a reinforcing rib (14) is installed between the platform fixing plate (12) and the T-shaped base plate (11).

3. The universal test bench for steering gear stiffness test according to claim 1, characterized in that: A limiting column is installed on the T-shaped plate (31).

4. The universal test bench for steering gear stiffness test according to claim 1, characterized in that: The fixing plate assembly (39) includes a positioning fixing plate and a reinforcing plate. The positioning fixing plate is installed on the surface of the reinforcing plate. The surface of the positioning fixing plate is provided with a lower shell positioning plate (38). A reinforcing rib is installed between the positioning fixing plate and the T-shaped plate (31). After the screw rod (33) passes through the positioning fixing plate, it is connected to the reinforcing plate by a bearing.

5. The universal test bench for steering gear stiffness test according to claim 1, characterized in that: The sample auxiliary fixing mechanism (4) is installed on the T-shaped plate (31), and the sample auxiliary fixing mechanism (4) clamps the middle part of the steering machine sample (6).

6. The universal test bench for steering gear stiffness test according to claim 5, characterized in that: The sample auxiliary fixing mechanism (4) includes a T-shaped slider (41), an adjustment base (42), a locking nut (43), an adjustable support column (44), an adjustable fixing plate (45), a connecting plate (46), and a tightening bolt (47). The T-shaped slider (41) is installed on the rear surface of the adjustment base (42). The T-shaped slider (41) is slidably connected to the T-shaped plate (31). The adjustment base (42) is straddled on the screw rod (33). The front surface of the adjustment base (42) is installed with an adjustable support column (44). The adjustable support column (44) and the adjustable fixing plate (45) are connected by a locking nut (43). A connecting plate (46) is provided at each end of the adjustable fixing plate (45). A tightening bolt (47) is installed on the connecting plate (46). The two tightening bolts (47) are pressed against the middle of the steering gear sample (6).

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