Test board for testing collapsing moment of steering engine and bending rigidity of rack
By designing a test bench that includes a base, a test clamp block, and an angle adjustment component, the problem of inefficient testing of steering gear destructive torque and rack bending stiffness in existing technologies has been solved, achieving high-precision testing results and improving vehicle driving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BOSCH HUAYU STEERING SYSTEMS (YANTAI) CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-05-12
AI Technical Summary
Existing technologies make it difficult to efficiently and accurately test the destructive torque of steering gears and the bending stiffness of racks, which affects vehicle driving safety.
A test bench was designed, comprising a base, a test clamp block, an angle adjustment assembly, a reducer, and other components. Through height adjustment, torsion, and tension/compression testing mechanisms, high-precision testing of the destructive torque of the steering gear and the bending stiffness of the rack was achieved.
It achieves high-precision and high-efficiency testing of steering gear destructive torque and rack bending stiffness, ensuring vehicle driving safety.
Smart Images
Figure CN224231285U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steering system technology, specifically a test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack. Background Technology
[0002] The steering gear is a key component of a car's steering system. It connects to the steering intermediate shaft and the left and right steering arms. The steering gear converts the rotation of the steering wheel into the swinging motion of the steering arms or the linear reciprocating motion of the rack shaft. Electric power steering gears can also provide steering assistance. During driving, the steering mechanism is operated by the steering gear. Factors such as road conditions, front axle load, the steering gear's torsional resistance, and rack bending stiffness, along with the friction between the wheels bearing the vehicle's weight and the ground, generate damping. The steering gear's ability to withstand high torque impacts and the rack's bending stiffness directly affect vehicle safety.
[0003] The destructive torque of a steering gear refers to the ability of the steering gear input shaft gear and rack to resist large torque impacts from the input shaft end under extreme operating conditions. Rack bending stiffness is the ability of the rack to undergo elastic deformation under road impacts during vehicle operation. Due to the importance of the steering gear in the steering system, destructive torque testing and rack bending stiffness testing are crucial test items related to steering safety. Summary of the Invention
[0004] To overcome the shortcomings of the prior art, this utility model provides a test bench for testing the destructive torque of steering gears and the bending stiffness of racks. It has a simple structure, is easy to operate, and can test the destructive torque of steering gears and the bending stiffness of racks with high precision and high efficiency.
[0005] To achieve the above objectives, a test bench for testing the destructive torque and rack bending stiffness of a steering gear is designed, comprising a base, a test clamp block, an angle adjustment assembly, and a reducer. The base is characterized by a column connected to it, a height adjustment mechanism connected to the top of the column, the height adjustment mechanism being connected to the test clamp block via a lead screw assembly, and a torsion test mechanism and a tension / compression test mechanism connected to the left and right sides of the test clamp block respectively via the left and right angle adjustment assemblies.
[0006] The top of the base is connected to the bottom of the column, and the bottom of the base is connected to the test bench.
[0007] The bottom of the column is connected to the base, and the top of the column is connected to the height adjustment mechanism through a fastening assembly. A first lead screw is provided on the left and right sides of the column, and the first lead screw on the left and right sides is connected to the test clamp block through a lead screw nut. The top of the first lead screw on the left and right sides is connected to the first bevel gear through the fastening assembly.
[0008] The height adjustment mechanism includes a first handwheel, a first reducer, and a second bevel gear. The bottom of the first reducer is connected to the top of the fastening assembly. The input end of the first reducer is connected to the first handwheel. The left and right ends of the output end of the first reducer are respectively shaft-connected to the second bevel gear. The second bevel gears on the left and right sides are respectively meshed with the first bevel gears on the top of the first lead screw on the left and right sides.
[0009] The torsion testing mechanism includes a torsion testing seat, a second reducer, a sliding block, a slide rail, a rack, a transmission gear, and a torque output connector. The back of the torsion testing seat is connected to the test clamp block via a left-side angle adjustment component. A slide rail is provided on the inner side of the front of the torsion testing seat, and a sliding block is connected to the slide rail. The sliding block is connected to a second lead screw via a lead screw nut. One end of the second lead screw is connected to one side of the torsion testing seat, and the other end of the second lead screw is connected to the output end of the second reducer. The second reducer is connected to the other side of the torsion testing seat. A rack is connected to the sliding block, and the rack meshes with the transmission gear. The transmission gear shaft is connected to one end of a rotating shaft, and the other end of the rotating shaft passes through the bottom of the torsion testing seat and is connected to the torque output connector.
[0010] The torsion test stand has an L-shaped structure, with side plates on the left and right sides respectively connected to one end of the second lead screw and the second reducer.
[0011] The tensile and compressive testing mechanism includes a tensile and compressive testing seat, a second handwheel, a trapezoidal lead screw, a connecting flange, a worm gear, and a worm wheel. The back of the tensile and compressive testing seat is connected to the test clamp block via the right-side angle adjustment component. The front of the tensile and compressive testing seat is connected to one end of the worm gear via a worm gear connecting seat. The other end of the worm gear is connected to the second handwheel. One side of the worm gear is meshed with the worm wheel. The worm wheel shaft is connected to the sliding block on the trapezoidal lead screw. The bottom of the trapezoidal lead screw passes through the tensile and compressive testing seat and is connected to the connecting flange.
[0012] The tensile and compressive test fixture has an L-shaped structure.
[0013] One end of the connecting flange is connected to the trapezoidal lead screw, and the other end of the connecting flange is connected to the force-applying rod, and a force sensor is connected to the force-applying rod.
[0014] Compared with the prior art, this utility model provides a test bench for testing the destructive torque of steering gear and the bending stiffness of rack. It has a simple structure, is easy to operate, and can test the destructive torque of steering gear and the bending stiffness of rack with high precision and high efficiency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the height adjustment mechanism in this utility model.
[0017] Figure 3 This is a schematic diagram of the torsion testing mechanism in this utility model.
[0018] Figure 4 , Figure 5 This is a schematic diagram of the tensile and compressive testing mechanism in this utility model.
[0019] Figure 6 This is a schematic diagram of the present invention used for destructive torque testing.
[0020] Figure 7 This is a graph showing the destructive torque test.
[0021] Figure 8 This is a schematic diagram of the present invention used for rack bending stiffness testing. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings.
[0023] like Figures 1 to 5 As shown, the base 1 is connected to the column 2, and the height adjustment mechanism 6 is connected to the top of the column 2. The height adjustment mechanism 6 is connected to the test clamp block 10 through the lead screw assembly. The left and right sides of the test clamp block 10 are connected to the torsion test mechanism 9 and the tension and compression test mechanism 8 through the left angle adjustment assembly 11 and the right angle adjustment assembly 7, respectively.
[0024] The top of base 1 is connected to the bottom of column 2, and the bottom of base 1 is connected to the test bench.
[0025] The bottom of the column 2 is connected to the base 1, and the top of the column 2 is connected to the height adjustment mechanism through the fastening assembly 5. The left and right sides of the column 2 are respectively provided with the first lead screw 3. The first lead screw 3 on the left and right sides is connected to the test clamp block 10 through the lead screw nut. The top of the first lead screw 3 on the left and right sides is connected to the first bevel gear 4 through the fastening assembly 5.
[0026] The height adjustment mechanism 6 includes a first handwheel, a first reducer, and a second bevel gear. The bottom of the first reducer 6-2 is connected to the top of the fastening assembly 5. The input end of the first reducer 6-2 is connected to the first handwheel 6-1. The left and right ends of the output end of the first reducer 6-2 are respectively shaft-connected to the second bevel gear 6-3. The second bevel gear 6-3 on the left and right sides are respectively meshed with the first bevel gear 4 on the top of the first lead screw 3 on the left and right sides.
[0027] The torsion testing mechanism 9 includes a torsion testing seat, a second reducer, a sliding block, a slide rail, a rack, a transmission gear, and a torque output connector. The back of the torsion testing seat 9-5 is connected to the test clamp block 10 via the left-side angle adjustment component 11. The inner side of the front of the torsion testing seat 9-5 is provided with a slide rail 9-4, and a sliding block 9-3 is connected to the slide rail 9-4. The sliding block 9-3 is connected to the second lead screw 9-8 via a lead screw nut. One end of the second lead screw 9-8 is connected to one side of the torsion testing seat 9-5, and the other end of the second lead screw 9-8 is connected to the output end of the second reducer 9-1. The second reducer 9-1 is connected to the other side of the torsion testing seat 9-5. A rack 9-2 is connected to the sliding block 9-3, and the rack 9-2 meshes with the transmission gear 9-6. The transmission gear 9-6 is shafted to one end of a rotating shaft 9-9, and the other end of the rotating shaft 9-9 passes through the bottom of the torsion testing seat 9-5 and is connected to the torque output connector 9-7.
[0028] The torsion test stand 9-5 has an L-shaped structure. On the left and right sides of the torsion test stand 9-5, there are side plates that are connected to one end of the second lead screw 9-8 and the second reducer 9-1, respectively.
[0029] The tensile and compressive testing mechanism 8 includes a tensile and compressive testing seat, a second handwheel, a trapezoidal lead screw, a connecting flange, a worm gear, and a worm wheel. The back of the tensile and compressive testing seat 8-1 is connected to the test clamp block 10 via the right-side angle adjustment component 7. The front of the tensile and compressive testing seat 8-1 is connected to one end of the worm gear 8-5 via the worm gear connecting seat. The other end of the worm gear 8-5 is connected to the second handwheel 8-3. One side of the worm gear 8-5 is meshed with the worm wheel 8-6. The worm wheel 8-6 is shaft-connected to the sliding block on the trapezoidal lead screw 8-2. The bottom of the lead screw of the trapezoidal lead screw 8-2 passes through the tensile and compressive testing seat 8-1 and is connected to the connecting flange 8-4.
[0030] The tension and compression test stand 8-1 has an L-shaped structure.
[0031] One end of the connecting flange 8-4 is connected to the trapezoidal lead screw 8-2, and the other end of the connecting flange 8-4 is connected to the force-applying rod 8-7, and the force sensor 8-8 is connected to the force-applying rod 8-7.
[0032] The height adjustment mechanism 6 in this invention mainly serves to adjust the height of the torsion testing mechanism 9 and the tension / compression testing mechanism 8 to adapt to the spatial positions of different product categories. The first handwheel 6-1 rotates, driving the first reducer 6-2, which, through bevel gear transmission, drives the first lead screws 3 on both sides to rotate, thereby causing the test clamp block 10 to move up and down. The left and right sides of the test clamp block 10 are respectively connected to the torsion testing mechanism 9 and the tension / compression testing mechanism 8.
[0033] The torsion testing mechanism 9 in this invention can be adjusted in angle to connect to the same axis as the product's input shaft, depending on the product. Following the torsion input-output transmission sequence, the order is: input hand force - reduction mechanism - lead screw - slide rail - slider - rack - gear - torque output, thus achieving a larger, more stable, and more precise torque output from a smaller input hand force.
[0034] The tension and compression testing mechanism 8 in this utility model can be adjusted to align its angle with the direction of force applied to the tested part according to different products. It is connected to the tested part through the connecting flange 8-4. A small hand force is input by adjusting the second handwheel 8-3, and a larger tension or compression force is output through the worm gear and worm wheel transmission mechanism. This causes the trapezoidal lead screw 8-2 to move up and down. The trapezoidal lead screw 8-2 drives the connecting flange 8-4 to move up and down to apply tension or compression force to the tested part.
[0035] like Figure 6 , Figure 7 As shown, this utility model is used for destructive torque testing:
[0036] 1. Adjust the position of base 1 on the test bench according to the position of the steering gear part being tested;
[0037] 2. Adjust the height of the torsion testing mechanism 9 using the height adjustment mechanism 6 according to the height of the steering gear part being tested;
[0038] 3. Adjust the angle of the torsion test mechanism 9 according to the angle of the steering gear input shaft;
[0039] 4. Apply torque to the upper end of the input shaft of the part being tested until the torque reaches 250 Nm, then stop the test;
[0040] 5. Record the rotation angle and torque during the test. The test curve should not drop or jump.
[0041] like Figure 8 As shown, this utility model is used for rack bending stiffness testing:
[0042] 1. Adjust the position of base 1 on the test bench according to the position of the steering gear part being tested;
[0043] 2. Adjust the height of the tension and compression testing mechanism 8 using the height adjustment mechanism 6 according to the height of the steering gear part being tested;
[0044] 3. Adjust the angle of the tension / compression testing mechanism 8 according to the position of the steering gear rack;
[0045] 4. After adjusting the angle and position, connect it to the input shaft or rack of the product being tested;
[0046] 5. The rack is at its left and right extreme positions respectively;
[0047] 6. Apply a static load F at the center of the inner ball joint of the rack at its limit position, with the load direction perpendicular to the rack axis, and measure the displacement of the rack at the center of the inner ball joint.
[0048] 7. Record the force vs. displacement curves during the loading process; the displacement change must not exceed the required range and there must be no breakage.
Claims
1. A test bench for testing the destructive torque and rack bending stiffness of a steering gear, comprising a base, a test clamp block, an angle adjustment assembly, and a reducer, characterized in that: The base (1) is connected to the column (2), and the height adjustment mechanism (6) is connected to the top of the column (2). The height adjustment mechanism (6) is connected to the test clamp block (10) through the screw assembly. The left and right sides of the test clamp block (10) are connected to the torsion test mechanism (9) and the tension and compression test mechanism (8) through the left angle adjustment assembly (11) and the right angle adjustment assembly (7), respectively.
2. The test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack, as described in claim 1, is characterized in that: The top of the base (1) is connected to the bottom of the column (2), and the bottom of the base (1) is connected to the test bench.
3. The test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack, as described in claim 1, is characterized in that: The bottom of the column (2) is connected to the base (1), and the top of the column (2) is connected to the height adjustment mechanism through the fastening assembly (5). The left and right sides of the column (2) are respectively provided with first lead screws (3). The first lead screws (3) on the left and right sides are connected to the test clamp block (10) through lead screw nuts. The top of the first lead screws (3) on the left and right sides are connected to the first bevel gear (4) through the fastening assembly (5).
4. The test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack according to claim 1, characterized in that: The height adjustment mechanism (6) includes a first handwheel, a first reducer, and a second bevel gear. The bottom of the first reducer (6-2) is connected to the top of the fastening assembly (5). The input end of the first reducer (6-2) is connected to the first handwheel (6-1). The left and right ends of the output end of the first reducer (6-2) are respectively shaft-connected to the second bevel gear (6-3). The second bevel gears (6-3) on the left and right sides are respectively meshed with the first bevel gear (4) at the top of the first lead screw (3) on the left and right sides.
5. A test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack, as described in claim 1, characterized in that: The torsion testing mechanism (9) includes a torsion testing seat, a second reducer, a sliding block, a slide rail, a rack, a transmission gear, and a torque output connector. The back of the torsion testing seat (9-5) is connected to the test clamp block (10) via the left-side angle adjustment component (11). The inner side of the front of the torsion testing seat (9-5) is provided with a slide rail (9-4). A sliding block (9-3) is connected to the slide rail (9-4). The sliding block (9-3) is connected to the second lead screw (9-8) via a lead screw nut. One end of the second lead screw (9-8) is connected to the torsion testing seat. One side of (9-5) is connected, and the other end of the second lead screw (9-8) is connected to the output end of the second reducer (9-1). The second reducer (9-1) is connected to the other side of the torsion test seat (9-5). The sliding block (9-3) is connected to the rack (9-2), and the rack (9-2) meshes with the transmission gear (9-6). The transmission gear (9-6) is shafted to one end of the rotating shaft (9-9), and the other end of the rotating shaft (9-9) passes through the bottom of the torsion test seat (9-5) and is connected to the torque output connector (9-7).
6. A test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack, as described in claim 5, characterized in that: The torsion test seat (9-5) is an L-shaped structure. Side plates are provided on the left and right sides of the torsion test seat (9-5) respectively, which are connected to one end of the second lead screw (9-8) and the second reducer (9-1).
7. A test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack, as described in claim 1, characterized in that: The tensile and compressive testing mechanism (8) includes a tensile and compressive testing seat, a second handwheel, a trapezoidal lead screw, a connecting flange, a worm, and a worm wheel. The back of the tensile and compressive testing seat (8-1) is connected to the test clamp block (10) via the right-side angle adjustment component (7). The front of the tensile and compressive testing seat (8-1) is connected to one end of the worm (8-5) via the worm connecting seat. The other end of the worm (8-5) is connected to the second handwheel (8-3). One side of the worm (8-5) is meshed with the worm wheel (8-6). The worm wheel (8-6) is shaft-connected to the sliding block on the trapezoidal lead screw (8-2). The bottom of the lead screw of the trapezoidal lead screw (8-2) passes through the tensile and compressive testing seat (8-1) and is connected to the connecting flange (8-4).
8. A test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack, as described in claim 7, characterized in that: The tension and compression test stand (8-1) is an L-shaped structure.
9. A test bench for testing the destructive torque of a steering gear and the bending stiffness of a rack, as described in claim 7, characterized in that: One end of the connecting flange (8-4) is connected to the trapezoidal lead screw (8-2), and the other end of the connecting flange (8-4) is connected to the force-applying rod (8-7), and a force sensor (8-8) is connected to the force-applying rod (8-7).