A floating steering bridge test fixture

Abstract

The present invention belongs to the technical field of engineering machinery testing, and specifically relates to a steering axle test fixture. It includes a test base and a steering axle mounting mechanism. A test bracket is horizontally arranged on the test base. Pressure sensing mechanisms are respectively arranged at both ends of the test bracket. Each pressure sensing mechanism includes a pressure sensor and a sensor mounting bracket, and the pressure sensor is fixedly mounted on the upper end of the sensor mounting bracket through a sensor mounting plate; the steering axle mounting mechanism includes a horizontal upper pressure plate, a slide rail mechanism and a horizontal bridge body mounting plate. The upper pressure plate is movably arranged on the bridge body mounting plate through the slide rail mechanism, and the two ends of the upper pressure plate are respectively pressed on the pressure sensor through the cooperation of a horizontal positioning plate and bolts. Therefore, the test fixture of the present invention allows the steering axle body to have a certain swinging space during the rotation of the tire in situ, and at the same time, the strength can withstand the external force generated at the steering axle body when the tire is running, so that it will not be damaged during fatigue testing.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery testing, and in particular relates to a steering axle testing tool. Background Art

[0002] The steering axle is the actuator of the forklift's steering action, and the bridge body is the connecting part between the steering axle and the forklift frame. Due to the particularity of the steering axle structure, the bridge body will swing a little when turning in situ;

[0003] The fatigue test of the steering axle is to assess the strength of each component when the steering axle is turning in situ. The fixed position of the test fixture is on the bridge body. For the actual working condition of the bridge body swinging, the bridge body should also have a certain swing space when designing the test fixture, otherwise the stress condition of the entire steering axle will not be consistent with the working condition of the whole vehicle, thus affecting the effect of the fatigue test;

[0004] Therefore, it is necessary to design fixed fixtures for the steering axle, which can simulate actual working conditions when the tires rotate in situ, so that the bridge body has a certain swing space. The strength of the fixtures should be able to withstand the external forces generated on the bridge body when the tires are running, so that it will not be damaged during fatigue testing. Summary of the invention

[0005] In view of the above existing situation, the present invention designs a floating steering axle test fixture, which is provided with a self-adjusting mechanism. During the rotation of the tire, the bridge body position can be automatically adjusted under the push of external force to ensure that the overall force of the steering axle is similar to the working condition of the whole vehicle.

[0006] The specific technical solutions are as follows:

[0007] A floating steering axle test fixture comprises a test base 1 and a steering axle mounting mechanism, a test bracket 2 is horizontally arranged on the test base 1, and pressure sensing mechanisms are respectively arranged at both ends of the test bracket 2, each pressure sensing mechanism comprises a pressure sensor 31 and a sensor mounting bracket 32, and the pressure sensor 31 is fixedly mounted on the upper end of the sensor mounting bracket 32 ​​through a sensor mounting plate 33;

[0008] The steering axle mounting mechanism includes a horizontal upper pressure plate 41, a slide rail mechanism and a horizontal bridge body mounting plate 45. The upper pressure plate 41 is movably mounted on the bridge body mounting plate 45 through the slide rail mechanism. Both ends of the upper pressure plate 41 are correspondingly pressed on the pressure sensor 31 through the clamping bolts 6.

[0009] During operation, the steering axle body and the axle body mounting plate 45 are fixedly connected by bolts, and the axle body mounting plate 45 and the upper pressure plate 41 can move relative to each other in the X and Y axis directions of the steering axle body through the slide rail mechanism, so that the steering axle body is in a floating state under the action of external force.

[0010] Further, each of the sensor mounting brackets 32 includes a bottom plate 321 and a side plate 322 standing upright at the end of the bottom plate 321, and upright ribs 323 are arranged on both sides of the middle of the side plate 322. The sensor mounting plate 33 is a circular plate and is horizontally fixedly installed in the middle of the upper end of the side plate 322. The bottom plate 321 is bolted and fixedly installed on the test bracket 2;

[0011] A pair of side plates on the two sensor mounting brackets 32 are arranged in parallel with each other, and side pressure elastic plates 5 are provided at right angles to the upper ends of the opposite surfaces.

[0012] Furthermore, the test bracket 2 includes an upper bracket plate 21 and a lower bracket plate 22 which are arranged in parallel up and down, and the two ends of the upper bracket plate 21 are fixedly installed with bolts on the base plate 321, and the lower bracket plate 22 is fixedly installed on the test base 1 with bolts; the fitting surfaces of the upper bracket plate 21 and the base plate 321, and the fitting surfaces of the lower bracket plate 22 and the test base 1 are fastened by the cooperation of a flat key and a keyway.

[0013] Furthermore, the upper pressing plate 41 is a welded part, comprising a horizontal I-shaped plate and two pairs of U-shaped plates correspondingly located at the two ends above the I-shaped plate.

[0014] Each pair of U-shaped plates is arranged horizontally and fixedly connected at the bottom, and the U-shaped plates extending out of the ends of the I-shaped plates are correspondingly pressed onto the pressure sensors 31 through the clamping bolts 6 .

[0015] Furthermore, the slide rail mechanism includes a pair of linear slide rails A43, a pair of linear slide rails B44 and an intermediate plate 46. The pair of linear slide rails A43 are arranged on both sides of the length direction of the bridge body mounting plate 45. The intermediate plate 46 is slidably fitted on the pair of linear slide rails A43. A pair of linear slide rails B44 are arranged at the upper end of the intermediate plate 46 along the width direction of the bridge body mounting plate 45. The upper pressure plate 41 is slidably fitted on the pair of linear slide rails B44.

[0016] Further, the bridge body mounting plate 45 is a rectangular plate, and horizontal L-shaped plates 452 are evenly arranged at the four right angles of the rectangular plate, and first limiting bolts 453 are each provided on the opposite surfaces of a pair of horizontal L-shaped plates in the same width direction of the rectangular plate, and second limiting bolts 454 are each provided on a pair of horizontal L-shaped plates corresponding to the same extension direction of the rectangular plate;

[0017] The lower ends of the four right angles of the rectangular plate are each provided with a bolt mounting plate 451 .

[0018] The beneficial technical effects of the present invention are as follows:

[0019] The floating steering bridge test fixture of the present invention comprises a test base and a steering bridge mounting mechanism, a test bracket is horizontally arranged on the test base, and pressure sensing mechanisms are respectively arranged at both ends of the test bracket, each pressure sensing mechanism comprises a pressure sensor and a sensor mounting bracket, and the pressure sensor is fixedly mounted on the upper end of the sensor mounting bracket through a sensor mounting plate;

[0020] The connecting bolts connect the steering axle mounting mechanism to the steering axle bridge body, and then place it on the test base. Use the clamping bolts to clamp the steering axle mounting mechanism, and transmit the clamping force to the tire, so that the tire is pressed on the test base to simulate the pressure of the whole vehicle weight on the tire. The pressure sensor is used to measure the loading force. The clamping force can be adjusted by the tightening degree of the clamping bolts. Therefore, the strength of the test fixture can withstand the external force generated on the bridge body when the tire is running, so that it will not be damaged during the fatigue test;

[0021] At the same time, when the steering axle is installed, that is, the steering axle body and the axle body mounting plate are bolted and connected, the actual working condition can be simulated during the tire in-situ steering process. The axle body mounting plate and the upper pressure plate can move relative to each other in the X and Y axis directions of the steering axle body through the slide rail mechanism, so that the steering axle body is in a floating state under the action of external force, simulating the stress condition of the entire steering axle to be consistent with the working condition of the whole vehicle, thereby ensuring the accuracy of the fatigue test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the floating steering bridge test fixture of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the steering axle mounting mechanism of the present invention.

[0024] Figure 3 for Figure 2 Exploded diagram.

[0025] Figure 4 It is a structural schematic diagram of the pressure sensing mechanism of the present invention.

[0026] Figure 5 This is a working status diagram of the steering axle test fixture of the present invention.

[0027] Among them: 1 test base, 2 test bracket, 21 upper bracket plate, 22 lower bracket plate, 31 pressure sensor, 32 sensor mounting bracket, 33 sensor mounting plate, 321 bottom plate, 322 side plate, 323 rib plate, 41 upper pressure plate, 43 a pair of linear guide rails A, 44 a pair of linear guide rails B, 45 bridge body mounting plate, 46 middle plate, 451 bolt mounting plate, 452 horizontal L-shaped plate, 453 first limiting bolt, 454 second limiting bolt, 5 side pressure elastic plate. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0029] See Figure 1 A floating steering axle test fixture comprises a test base 1 and a steering axle mounting mechanism, a test bracket 2 is horizontally arranged on the test base 1, and pressure sensing mechanisms are respectively arranged at both ends of the test bracket 2, each pressure sensing mechanism comprises a pressure sensor 31 and a sensor mounting bracket 32, and the pressure sensor 31 is fixedly mounted on the upper end of the sensor mounting bracket 32 ​​through a sensor mounting plate 33;

[0030] The steering axle mounting mechanism includes a horizontal upper pressure plate 41, a slide rail mechanism and a horizontal bridge body mounting plate 45. The upper pressure plate 41 is movably mounted on the bridge body mounting plate 45 through the slide rail mechanism. Both ends of the upper pressure plate 41 are correspondingly pressed onto the pressure sensor 31 through clamping bolts 6.

[0031] See Figure 4 Each of the sensor mounting brackets 32 includes a bottom plate 321 and a side plate 322 standing upright at the end of the bottom plate 321, and upright ribs 323 are arranged on both sides of the middle of the side plate 322. The sensor mounting plate 33 is a circular plate and is horizontally fixedly installed in the middle of the upper end of the side plate 322. The bottom plate 321 is bolted and fixedly installed on the test bracket 2;

[0032] A pair of side plates on the two sensor mounting brackets 32 are arranged in parallel, and the upper right angles of the opposite surfaces are provided with side pressure elastic plates 5. The side pressure elastic body 5 adopts a high-hardness polyurethane gasket, which can withstand a large pressure and has a small deformation, which can effectively reduce the impact force and protect the slide rail mechanism.

[0033] The test bracket 2 includes an upper bracket plate 21 and a lower bracket plate 22 which are arranged in parallel up and down, and the two ends of the upper bracket plate 21 are fixedly installed with bolts on the bottom plate 321, and the lower bracket plate 22 is fixedly installed on the test base 1 with bolts; the fitting surfaces of the upper bracket plate 21 and the bottom plate 321, and the fitting surfaces of the lower bracket plate 22 and the test base 1 are fastened by the cooperation of a flat key and a keyway.

[0034] See Figure 2 and Figure 3 The upper pressing plate 41 is a welded part, comprising a horizontal I-shaped plate and two pairs of U-shaped plates corresponding to the two ends above the I-shaped plate.

[0035] Each pair of U-shaped plates is arranged horizontally and fixedly connected at the bottom, and the U-shaped plates extending out of the ends of the I-shaped plates are correspondingly pressed onto the pressure sensors 31 through the clamping bolts 6 .

[0036] The slide rail mechanism includes a pair of linear slide rails A43, a pair of linear slide rails B44 and an intermediate plate 46. The pair of linear slide rails A43 are arranged on both sides of the length direction of the bridge body mounting plate 45. The intermediate plate 46 is slidably arranged on the pair of linear slide rails A43. The pair of linear slide rails B44 are arranged on the upper end of the intermediate plate 46 along the width direction of the bridge body mounting plate 45. The upper pressure plate 41 is slidably arranged on the pair of linear slide rails B44. The first slide rail and the second slide rail are both heavy-duty linear guide rails, and their model is HGW30HB2R280Z0C or HGW30HB2R320Z0C.

[0037] The bridge body mounting plate 45 is a rectangular plate, and horizontal L-shaped plates 452 are evenly arranged at the four right angles of the rectangular plate, and first limiting bolts 453 are each provided on the opposite surfaces of a pair of horizontal L-shaped plates in the same width direction of the rectangular plate, and second limiting bolts 454 are each provided on a pair of horizontal L-shaped plates corresponding to the same extension direction of the rectangular plate;

[0038] The lower ends of the four right angles of the rectangular plate are all provided with bolt mounting plates 451. The first limiting bolt 453 and the second limiting bolt 454 are used to limit the movement range of the steering bridge body.

[0039] See Figure 5 When working, the steering axle body and the axle body mounting plate are fixedly connected by bolts, and the axle body mounting plate and the upper pressure plate can move relative to each other in the X and Y axis directions of the steering axle body through the slide rail mechanism, so that the steering axle body is in a floating state under the action of external force, simulating the stress condition of the entire steering axle under the working conditions of the whole vehicle.

[0040] Therefore, the test fixture of the present invention can simulate the actual working condition during the tire rotation process, so that the steering axle body has a certain swing space. At the same time, the strength of the test fixture can withstand the external force generated on the steering axle body when the tire is running, so that it will not be damaged during the fatigue test.

[0041] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A floating steering bridge test fixture, characterized in that: The invention comprises a test base (1) and a steering axle mounting mechanism, wherein a test bracket (2) is horizontally arranged on the test base (1), and pressure sensing mechanisms are respectively arranged at both ends of the test bracket (2), each of the pressure sensing mechanisms comprises a pressure sensor (31) and a sensor mounting bracket (32), and the pressure sensor (31) is fixedly mounted on the upper end of the sensor mounting bracket (32) via a sensor mounting plate (33); each of the sensor mounting brackets (32) comprises a bottom plate (321) and a side plate (322) vertically disposed at the end of the bottom plate (321), and vertical rib plates (323) are arranged on both sides of the middle of the side plate (322); the sensor mounting plate (33) is a circular plate and is horizontally fixedly mounted in the middle of the upper end of the side plate (322), and the bottom plate (321) is fixedly mounted on the test bracket (2) by bolts; A pair of side plates on the two sensor mounting brackets (32) are arranged in parallel with each other, and side pressure elastic plates (5) are provided at right angles to the upper ends of the opposite surfaces; The steering axle mounting mechanism comprises a horizontal upper pressure plate (41), a slide rail mechanism and a horizontal axle body mounting plate (45); the upper pressure plate (41) is movably mounted on the axle body mounting plate (45) via the slide rail mechanism; two ends of the upper pressure plate (41) are correspondingly pressed onto the pressure sensor (31) via clamping bolts (6); The slide rail mechanism comprises a pair of linear slide rails A (43), a pair of linear slide rails B (44) and an intermediate plate (46); the pair of linear slide rails A (43) are arranged on both sides of the bridge body mounting plate (45) in the length direction; the intermediate plate (46) is slidably fitted on the pair of linear slide rails A (43); the pair of linear slide rails B (44) are arranged on the upper end of the intermediate plate (46) along the width direction of the bridge body mounting plate (45); and the upper pressure plate (41) is slidably fitted on the pair of linear slide rails B (44); During operation, the steering axle body and the axle body mounting plate (45) are bolted and fixedly connected, and the axle body mounting plate (45) and the upper pressure plate (41) can move relative to each other in the X-axis and Y-axis directions of the steering axle body through a slide rail mechanism, so that the steering axle body is in a floating state under the action of external force.

2. The floating steering bridge test fixture according to claim 1, characterized in that: The test bracket (2) comprises an upper bracket plate (21) and a lower bracket plate (22) which are arranged in parallel up and down, and the two ends of the upper bracket plate (21) are fixedly mounted on the bottom plate (321) by bolts, and the lower bracket plate (22) is fixedly mounted on the test base (1) by bolts; the mating surfaces of the upper bracket plate (21) and the bottom plate (321) and the mating surfaces of the lower bracket plate (22) and the test base (1) are both fastened by the cooperation of a flat key and a keyway.

3. The floating steering bridge test fixture according to claim 1 is characterized in that: The upper pressure plate (41) is a welded component, comprising a horizontal I-shaped plate and two pairs of U-shaped plates located at the two ends above the I-shaped plate, each pair of U-shaped plates being arranged horizontally and fixedly connected at the bottom, and the U-shaped plates extending out of the ends of the I-shaped plate are pressed against the pressure sensor (31) via the clamping bolts (6).

4. The floating steering bridge test fixture according to claim 1 is characterized in that: The bridge body mounting plate (45) is a rectangular plate, and horizontal L-shaped plates (452) are arranged at four right angles of the rectangular plate, first limiting bolts (453) are arranged on opposite surfaces of a pair of horizontal L-shaped plates in the same width direction of the rectangular plate, and second limiting bolts (454) are arranged on a pair of horizontal L-shaped plates corresponding to the same extension direction of the rectangular plate; The lower ends of the four right angles of the rectangular plate are each provided with a bolt mounting plate (451).

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