Universal steering engine abnormal sound performance test bench

Abstract

The invention relates to the technical field of steering performance testing, and discloses a universal steering engine abnormal sound performance test bench which comprises a fixing unit and a balancing weight used for simulating loads at the upper end of a steering engine, the fixing unit is used for fixing the steering engine, sliding units are arranged on the two sides of the fixing unit, and the balancing weight is used for simulating loads at the upper end of the steering engine. Each sliding unit is fixedly provided with an excitation source, the output end of each excitation source is fixedly provided with a quick-change connector, through the arrangement of the quick-change connectors, when the steering engine is replaced, only the shell needs to be moved, the clamping jaws are made to be away from the axis of the base body, the fixed clamping teeth connected with a transverse pull rod of the steering engine can be removed, and the purpose of quickly replacing the steering engine is achieved. Compared with original flange connection, all bolts on the flange need to be dismantled, and operation is simpler.

Description

Technical Field

[0001] The invention relates to the technical field of steering performance testing, and in particular to a universal steering gear abnormal noise performance testing bench. Background Art

[0002] The steering system is a series of devices used to change or maintain the direction of the car's driving or reverse. The driver controls the direction of the car through the steering system. The steering gear is an important part of the steering system. It converts the rotational motion of the steering wheel and steering column into the linear motion of the steering tie rod through the gear rack mechanism, and then acts on the wheels to achieve steering.

[0003] The problem of abnormal noise in the steering gear is the most common complaint of drivers about abnormal noise in cars, which seriously affects the reliability and comfort of the whole vehicle and limits the reputation and sales of automobile products. However, due to the complex structure of the chassis system where the steering gear is located, the large number of parts and the numerous noises when the vehicle is running, it is difficult for engineers to accurately identify the abnormal noise of the steering gear under the conditions of the whole vehicle. Therefore, a special abnormal noise test bench is needed to accurately identify the abnormal noise of the steering gear. However, there are different models of steering gears on the market, and the lengths of steering tie rods vary greatly. The current equipment used to test the abnormal noise of the steering gear has poor versatility. When testing different steering gears, it is necessary to reprocess the tooling or disassemble and move the fixed excitation source. The process is cumbersome, the reliability is low, and the effect of reproducing abnormal noise is poor.

[0004] In response to the problem that traditional steering gear abnormal noise performance test benches have different steering tie rod lengths for different models of steering gears, a universal steering gear abnormal noise performance test bench with application number 202320126636.5 is disclosed, which adapts to the problem of different steering tie rod lengths for different models of steering gears by sliding an excitation source on a workbench.

[0005] However, in order to prevent abnormal noise from occurring between the excitation source and the steering tie rod, which would affect the reliability and repeatability of the test results, a flange connection is usually used to ensure the reliability of the connection and avoid shaking between the output end of the excitation source and the steering tie rod during the test. However, each time the steering gear is disassembled, all the bolts on the flange need to be removed, which makes the disassembly process more cumbersome. This problem is particularly prominent when multiple steering gears of the same model need to be tested for each abnormal noise detection. Summary of the invention

[0006] The present invention aims to provide a universal steering gear abnormal noise performance test bench to simplify the steering gear disassembly process and reduce the complexity of steering gear disassembly during the test process.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a universal steering gear abnormal noise performance test bench, comprising a fixing unit and a counterweight block for simulating the upper end load of the steering gear, the fixing unit is used to fix the steering gear, sliding units are provided on both sides of the fixing unit, an excitation source is fixedly arranged on each sliding unit, a quick-change connector is fixedly arranged on the output end of the excitation source, the quick-change connector comprises a seat body and a shell, a plurality of fixed claws made of spring steel are fixedly arranged at one end of the seat body, the fixed claws are evenly distributed on the circumference of the seat body and gradually expand outward from one end of the seat body in a trumpet shape, the fixed claws are provided with fixed teeth that can be clamped on the threaded section of the transverse tie rod, the shell is sleeved outside the fixed claws and can drive the fixed teeth to move toward the axis of the seat body.

[0008] The beneficial effect of this solution is: through the setting of the quick-change joint, when replacing the steering gear, it is only necessary to move the shell so that the claws are away from the axis of the seat body, and the fixed teeth connected to the steering gear tie rod can be released, thereby completing the purpose of quickly replacing the steering gear. Compared with the original flange connection, it is necessary to remove all the bolts on the flange, and the operation is simpler.

[0009] Furthermore, the shell includes a first shell and a second shell, the first shell is arranged on the seat and is threadedly connected to the second shell, a first conical cavity is arranged in the second shell, and the inner wall of the first conical cavity has fixed claws that abut against the side away from the axis.

[0010] Furthermore, the quick-change connector also includes a movable claw, which is slidably arranged on the fixed claw. The movable claw is provided with a movable tooth near the axial side of the seat body, which can be clamped with the threaded section of the transverse tie rod under the drive of the shell. The first shell is sleeved outside the fixed claw, and a second conical cavity is provided in the first shell. The inner wall of the second conical cavity is against the movable tooth away from the axial side of the seat body.

[0011] Beneficial effect: By utilizing the arrangement of the movable claws and the movable teeth, the stability and reliability of the quick-change joint are further enhanced, making the replacement of the steering gear more convenient and quick.

[0012] Furthermore, a slide groove parallel to the axis of the seat body is formed on the fixed claw, and both sides of the movable claw are slidably connected to the movable claw slide groove, and the outer end of the movable claw extends out of the slide groove to abut against the housing. Thus, through the restriction of the slide groove, the movable claw is clamped with the horizontal tie rod under the drive of the first housing.

[0013] Furthermore, the housing includes a first housing and a second housing, the first housing is rotatably arranged on the seat body and is threadedly connected to the second housing, a tapered cavity is arranged in the second housing, and the inner wall of the tapered cavity abuts against the fixed claw away from the axis. When the first housing and the second housing rotate and approach each other, the setting of the tapered cavity allows the housing to rotate outside the fixed claw, so that the inner wall of the tapered cavity abuts against the movable claw and the fixed claw, driving the movable claw and the fixed claw to move toward the axis, so that the ends of the movable claw and the fixed claw abut against the screw thread of the tie rod.

[0014] Furthermore, the ends of the movable latch teeth and the fixed latch teeth facing the abutting side are both arc-shaped and form edges protruding toward the abutting side.

[0015] Furthermore, the fixed teeth are divided into a first tooth group and a second tooth group, and the teeth of the first tooth group and the second tooth group are arranged alternately. The ends of the inner edges of the teeth of the first tooth group are all arc-shaped and form edges protruding inward, and are engaged with the screw threads close to the seat body; the ends of the outer edges of the teeth of the second tooth group are all arc-shaped and form edges protruding outward, and are engaged with the screw threads away from the seat body.

[0016] Beneficial effects: 1. By alternately setting the first and second groups of latch teeth, the latch teeth are alternately pressed against the inner and outer sides of the screw threads when clamping, so as to provide better stability and torsional resistance, so as to avoid displacement between the latch teeth and the transverse tie rod when the excitation source starts to drive the transverse tie rod to move axially, resulting in additional abnormal noise and affecting the reliability of the test; at the same time, the latch teeth are distributed at different positions of the screw rod, and a good fixing effect can be maintained even under uneven force conditions; 2. The force can be evenly distributed to the screw rod through the two groups of latch teeth, so that the load is evenly distributed and excessive force on a single point is reduced The risk of damage and extended service life; 3. When the steering gear model changes, the diameter of the tie rod may change, and the thread on the tie rod will also change accordingly with the change of the tie rod diameter. This solution drives the fixed clamping tooth to move toward the axis of the seat body through the shell. At the same time, the fixed clamping tooth is divided into a first clamping tooth and a second clamping tooth that are alternately arranged, so that when the diameter of the tie rod changes, the first clamping tooth and the second clamping tooth can also be respectively pressed against the inner and outer sides of the thread, providing stable clamping performance, ensuring the stability of the connection between the tie rod and the output shaft of the excitation source, thereby ensuring the accuracy and repeatability of the abnormal noise test.

[0017] Furthermore, it also includes a rubber pad, which is fixed on the contact side of the movable claw and the fixed claw with the shell.

[0018] Furthermore, the fixed claw is in a T-shape, a cross shape, an I-shape or a stem shape, and a T-shape, a cross shape, an I-shape or a stem-shaped protrusion faces the axial direction of the base to form a fixed tooth, and the cross shape or the stem-shaped protrusion is away from the axial direction of the base and abuts against the inner wall of the conical cavity.

[0019] Furthermore, it also includes a rubber pad, which is fixed on the side where the fixing claw abuts against the shell.

[0020] Furthermore, a rubber part is fixed on the seat body, and the rubber part is fixedly arranged on the axis of the fixed claw and can be against the end of the tie rod. Through the arrangement of the rubber pad, during installation, the end of the tie rod contacts the rubber pad, avoiding collision or friction between the end of the tie rod and the fixed claw, causing abnormal noise, and affecting the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the detection state of an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional diagram of an embodiment of the present invention after the steering gear and the counterweight are removed;

[0023] Figure 3 An exploded view of the quick-change connector of the present invention;

[0024] Figure 4 This is a schematic structural diagram of a quick-change connector according to Embodiment 1 of the present invention;

[0025] Figure 5 Schematic diagram of the structure of the quick-change connector in Example 2 of the present invention. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The figure marks in the drawings of the specification include: workbench 10, steering gear 11, linear guide rail 121, slide 122, screw 123, turntable 124, handle 125, excitation source 13, counterweight 14, connecting seat 151, connecting part 152, quick-change connector 2, seat body 21, rubber pad 22, fixed latch 231, first latch group 2311, second latch group 2312, movable latch 232, first shell 241, second shell 242.

[0028] Example 1

[0029] Embodiment 1 is basically as attached Figure 1-4 As shown, a universal steering gear abnormal noise performance test bench is used for abnormal noise testing of the steering gear 11, such as Figure 1As shown, it includes a counterweight 14, a fixing unit, a sliding unit and an excitation source 13. The counterweight 14 is used to simulate the load on the upper end of the steering gear 11. The fixing unit includes a connecting seat 151 and a workbench 10. The steering gear 11 is installed on the connecting seat 151 and the load is simulated by the counterweight 14. A connecting portion 152 is welded at the bottom of the connecting seat 151. The connecting portion 152 is provided with a strip groove. The workbench 10 is provided with a plurality of mounting holes. The connecting seat 151 is bolted to the workbench 10 through the strip groove provided on the connecting portion 152. The connecting seat 151 is installed on the workbench 10 through the strip groove provided on the connecting portion 152. During installation, the connecting seat 151 can be slid and adjusted through the strip groove and then fastened with bolts, so as to facilitate the installation and fixation of steering gears 11 of different models on the workbench 10.

[0030] like Figure 2 As shown, the sliding unit includes two groups of sliding components, and the two groups of sliding components are respectively arranged on both sides of the workbench 10, each group of sliding components includes a linear guide 121, a driving component and a slide 122, the linear guide 121 is bolted to the workbench 10, and the driving component drives the slide 122 to move on the linear guide 121. In this embodiment, the driving component is a ball screw pair, and the ball screw pair includes a screw 123. The screw 123 is rotatably arranged on the workbench 10 and is threadedly connected to the slide. A turntable 124 is welded to the left end of the screw 123, and a handle 125 is hinged on the turntable 124 to increase the lever arm, thereby reducing the force required to rotate the screw 123. An excitation source 13 is bolted to the slide 122. In this embodiment, the excitation source 13 is a servo cylinder, and a quick-change joint 2 is flange-connected to the output shaft of the excitation source 13.

[0031] like Figure 3 , Figure 4 As shown, the quick-change connector 2 includes a shell, a seat 21 and a rubber pad 22. The shell includes a first shell 241 and a second shell 242. In this embodiment, a first conical cavity is provided inside the first shell 241, and a second conical cavity is provided inside the second shell 242. The first shell 241 and the second shell 242 are threadedly connected.

[0032] On the right side of the seat body 21, several fixing claws are integrally formed. The fixing claws are in the shape of a T, a cross, an I, or a "gan" character. The convex surfaces of the T, cross, I, or "gan" character are formed with fixing teeth 231 facing the direction of the base axis. The inner edge of the fixing teeth 231 is arc-shaped and forms an edge protruding inward. The sides of the cross or "gan" character convex away from the base axis are respectively abutted against the inner walls of the first conical cavity and the second conical cavity. The fixing claws are evenly distributed in the circumferential direction of the seat body 21 and extend from one end of the seat body 21 to the side away from the axis, forming a flared structure. In this embodiment, the fixing claws are in the shape of a "gan" character. The sides of the "gan" character convex away from the base axis are respectively abutted against the inner walls of the first conical cavity and the second conical cavity. Thus, through the relative movement of the first housing 241 and the second housing 242, the fixing claws are forced to deform, causing the teeth to move toward the axis of the seat body 21, thereby clamping with the threads of the threaded section of the tie rod 11 of the steering gear.

[0033] The rubber pad 22 is bonded to the seat body 21 and the abutting ends of the fixing claws and the housing to prevent friction between the housing and the fixing claws and between the tie rod and the seat body 21 when the excitation source 13 is started, generating abnormal noises and affecting the accuracy of the test results.

[0034] It should be noted that when the fixing claws are in the shape of a T or a cross with only one convexity, the second housing 242 needs to be welded or clamped to the seat body 21 to complete the cooperation of the relative movement with the first housing 241, so that the first housing can force the fixing claws to deform through the relative movement and complete the clamping work of the tie rod 11 of the steering gear.

[0035] The specific implementation process is as follows:

[0036] During installation, first, adjust the distance between the connecting seats 151 according to the model of the steering gear 11 so that the connecting seats 151 are adapted to the steering gear 11; second, move the sliding assembly away from the steering gear 11 through the driving component; then, install the steering gear 11 on the connecting seats 151 through bolts. At the same time, unscrew the first housing 241 and sleuth the first housing 241 onto the tie rod of the steering gear 11; then, move the sliding assembly close to the steering gear 11 through the driving component until the end of the tie rod contacts the rubber pad 22; then, threadedly connect the first housing 241 and the second housing 242 so that the fixing teeth 231 are clamped with the threads of the threaded section of the tie rod, completing the installation work of the steering gear 11.

[0037] During disassembly, first, turn the first housing 241 to separate the first housing 241 from the second housing 242; then, move the sliding assembly away from the steering gear 11 through the driving component; finally, disassemble the steering gear 11 to complete the disassembly work of the steering gear 11.

[0038] Embodiment 2

[0039] On the basis of Example 1, Figure 5 As shown, the quick-change connector 2 also includes a movable claw, a fixed claw is provided with a slide groove parallel to the axis of the seat body 21, the two sides of the movable claw are slidably connected to the movable claw slide groove, and the movable claw is provided with a movable tooth 232 close to the axial side of the seat body 21, which can be clamped with the threaded section of the transverse tie rod under the drive of the shell, and the outer end of the movable claw extends out of the slide groove and abuts against the inner wall of the second conical cavity.

[0040] Meanwhile, the fixed latching teeth 231 are divided into a first latching tooth group 2311 and a second latching tooth group 2312. The latching teeth of the first latching tooth group 2311 and the second latching tooth group 2312 are arranged alternately. Figure 5 As shown, when pressed tightly, the ends of the inner edges of the teeth of the first latching tooth group 2311 are all arc-shaped and form edges protruding inward, and the edges protruding inward are engaged with the screw threads close to the seat body 21; the ends of the outer edges of the teeth of the second latching tooth group 2312 are all arc-shaped and form edges protruding outward, and the edges protruding outward are engaged with the screw threads far from the seat body 21. Through the arrangement of the latching tooth group and the second latching tooth group 2312, the latching teeth are distributed at different positions of the screw rod 123, thereby providing better stability and torsion resistance, and maintaining a good fixing effect even in the case of uneven force. At the same time, the force transmitted by the excitation source 13 can be evenly distributed to the screw rod 123 through the two groups of latching teeth, so that the load is evenly distributed, the risk of excessive force on a single point is reduced, and the service life is extended.

[0041] When in use, the first housing 241 and the second housing 242 move toward each other, driving the movable latching teeth 232 and the fixed latching teeth 231 to clamp with the threaded section of the tie rod.

[0042] The above is only an embodiment of the present invention, and common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that the technical means for solving the problems in the above-mentioned embodiments of the present invention can be used in combination to solve multiple technical problems at the same time. For those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A universal steering gear abnormal noise performance test bench, comprising a fixing unit and a counterweight block for simulating the upper load of the steering gear, wherein the fixing unit is used to fix the steering gear, and sliding units are arranged on both sides of the fixing unit, and an excitation source is fixedly arranged on each sliding unit, and the characteristics are: A quick-change connector is fixed at the output end of the excitation source. The quick-change connector includes a seat body and a shell. A plurality of fixed claws made of spring steel are fixedly arranged at one end of the seat body. The fixed claws are evenly distributed on the circumference of the seat body and gradually expand outward from one end of the seat body in a trumpet shape. Fixed teeth that can be clamped on the threaded section of the transverse tie rod are arranged on the fixed claws. The shell is sleeved outside the fixed claws and can drive the fixed teeth to move toward the axis of the seat body.

2. A universal steering gear abnormal noise performance test bench according to claim 1, characterized in that: The shell comprises a first shell and a second shell. The first shell is arranged on the seat and is threadedly connected with the second shell. A first conical cavity is arranged in the second shell. The inner wall of the first conical cavity has fixed claws that abut against the side away from the axis.

3. A universal steering gear abnormal noise performance test bench according to claim 2, characterized in that: The quick-change connector also includes a movable claw, which is slidably arranged on the fixed claw. The movable claw is provided with a movable tooth near the axial center side of the seat body, which can be clamped with the threaded section of the transverse tie rod under the drive of the shell. The first shell is sleeved outside the fixed claw, and a second conical cavity is arranged in the first shell. The inner wall of the second conical cavity is against the movable tooth away from the axial center side of the seat body.

4. A universal steering gear abnormal noise performance test bench according to claim 3, characterized in that: The fixed clamping claw is provided with a sliding groove parallel to the axis of the seat body, the two sides of the movable clamping claw are slidably connected to the movable clamping claw sliding groove, and the outer end of the movable clamping claw extends out of the sliding groove to abut against the shell.

5. The universal steering gear abnormal noise performance test bench according to claim 4 is characterized in that: The ends of the movable latch teeth and the fixed latch teeth facing the abutting side are both arc-shaped and form edges protruding toward the abutting side.

6. A universal steering gear abnormal noise performance test bench according to claim 5, characterized in that: The fixed teeth are divided into a first tooth group and a second tooth group. The teeth of the first tooth group and the second tooth group are arranged alternately. The ends of the inner edges of the teeth of the first tooth group are all arc-shaped and form edges protruding inward, and are engaged with the screw teeth close to the seat body; the ends of the outer edges of the teeth of the second tooth group are all arc-shaped and form edges protruding outward, and are engaged with the screw teeth away from the seat body.

7. A universal steering gear abnormal noise performance test bench according to claim 8, characterized in that: It also includes a rubber pad, which is fixed on the contact side of the movable claw and the fixed claw with the shell.

8. A universal steering gear abnormal noise performance test bench according to any one of claims 1 to 7, characterized in that: The fixed claw is in a T-shape, a cross-shape, an I-shape or a stem-shape, and the T-shape, a cross-shape, an I-shape or a stem-shape protrusion faces the axial direction of the base to form a fixed tooth, and the cross-shape or stem-shaped protrusion is away from the axial direction of the base and abuts against the inner wall of the tapered cavity.

9. The universal steering gear abnormal noise performance test bench according to claim 1 is characterized by: It also includes a rubber pad, which is fixed on the side where the fixed claw abuts against the shell.

10. The universal steering gear abnormal noise performance test bench according to claim 1 is characterized by: A rubber part is fixed on the seat body, and the rubber part is fixedly arranged on the axis of the fixed clamping claw and can be abutted against the end of the transverse tie rod.

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