Fatigue durability device for toe-in rod

Abstract

The utility model relates to the technical field of automobile testing, in particular to a fatigue durability device for a toe-in rod, which comprises a base, and pressing blocks are mounted on the opposite inner walls of the base; reciprocating displacement motion is applied through the crankshaft, then the crankshaft drives the inside middle shaft to rotate, meanwhile, the middle shaft rotates on the inner wall of the inside clamping bearing, a torsion angle is formed on a left side sample, the leftmost U-shaped support, namely the second U-shaped block, is a force application device, loads are applied through a fatigue testing machine, and the torsion angle of the left side sample is formed. Enabling the sample to do axial back-and-forth movement, wherein the sample has axial force and torsional force; rotation speed data of the center shaft are monitored through the off-axis magnetic rotary encoder, when the front beam rod is fractured in a durable limit, the load of the center shaft is reduced, so that rotation resistance is reduced, the rotation speed of the center shaft is changed, then the electromagnet is powered on and magnetically attracted by the annular magnet, damping is generated on the center shaft, the center shaft is decelerated and stopped in time, and practicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile testing, in particular to a fatigue endurance device for a front toe rod. Background Art

[0002] The toe rod of the rear suspension of a car is a key component in the rear suspension system. It is usually related to the toe angle adjustment of the wheels. The main components of the rear suspension system include elastic elements (such as coil springs, air springs, etc.), shock absorbers, guide mechanisms and lateral stabilizers. These components work together to ensure the stability and comfort of the vehicle during driving. The toe rod is an important component for controlling the toe angle of the wheels. The toe angle of the wheels refers to the angle formed between the left and right wheels when looking down from above the vehicle. The correct toe angle can ensure the straight-line stability of the vehicle during driving and reduce abnormal wear of the tires. In the rear suspension structure of a car, the toe rod usually forms a complex connecting rod system together with other connecting rod arms, such as the front upper arm, front lower arm, rear upper arm, rear lower arm, etc. These connecting rod arms are connected to the body and wheels through ball heads or bushings, so that the wheels can move up and down with the road conditions while maintaining the correct positioning of the wheels.

[0003] The current two-channel endurance fatigue test equipment for toe rods has a technical shortcoming, that is, the test device lacks equipment resources capable of applying torsional loads. This deficiency means that when conducting the endurance test of toe rods, it is impossible to fully simulate the complex load conditions that may be encountered in actual driving, especially the influence of torsional stress. The comprehensiveness and accuracy of the test are not very good.

[0004] There is a significant safety hazard in the current dual-channel durability fatigue test of toe rods. When the toe rod has been subjected to long-term cyclic loading and has reached its durability limit, it is prone to sudden fracture. The broken toe rod debris may continue to swing in the test equipment due to inertia. At this time, the uncontrolled toe rod fragments will pose a serious threat to surrounding equipment and operators, and may cause secondary damage, which not only increases the risk of equipment damage, but may also endanger the personal safety of testers.

[0005] Therefore, a fatigue durability device for a toe rod is needed to improve the above problems. Utility Model Content

[0006] In order to solve the problem that when a fatigue endurance device performs a fatigue endurance test on a toe rod, the test device lacks equipment resources capable of applying a torsional load. This deficiency means that when performing a durability test on the toe rod, it is impossible to fully simulate the complex load conditions that may be encountered in actual driving. The utility model provides a fatigue endurance device for a toe rod to solve the above problem.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A fatigue endurance device for a toe rod comprises a base, wherein a clamping block is installed on the opposite outer walls of the base, a clamping bearing is installed on the inner wall of the clamping block, a central shaft is installed on the inner wall of the clamping bearing, a crankshaft is installed on the outer wall of the central shaft, a flat key block is arranged between the crankshaft and the central shaft, one end of the central shaft passes through the clamping bearing and a flange is installed on the end, a connecting plate is installed on the outer wall of the flange, a U-shaped block 1 is installed on the outer wall of the connecting plate, the toe rod is rotatably connected to the inner wall of the U-shaped block 1, and one end of the toe rod is rotatably connected to the U-shaped block 2.

[0009] As a preferred solution of the utility model, it also includes a fixed component, which includes an off-axis magnetic rotary encoder and a controller. The off-axis magnetic rotary encoder is installed on the inner wall of the base, and the controller is installed on the outer wall of the base. An electromagnet is installed on one side of the controller and located on the outer wall of the base. A ring magnet is magnetically connected to the inner wall of the electromagnet, and the ring magnet is installed on the outer wall of the central axis.

[0010] As a preferred solution of the utility model, the controller is respectively connected to an off-axis magnetic rotary encoder and an electromagnet through wires and the connection method is electrical connection. Limit strips are arranged on the opposite side walls of the base, and there are two groups of limit strips which are respectively located on the opposite side walls of the base.

[0011] As a preferred solution of the utility model, the cross section of the base is an inverted π-shaped structure, the clamping blocks are provided in two groups and are respectively located on opposite outer walls of the base, and the clamping bearings are provided in two groups and are respectively located on the outer walls of the central axis.

[0012] As a preferred solution of the utility model, one end of the flat key block is connected to the inner wall of the crankshaft, and the other end of the flat key block is connected to the inner wall of the center shaft.

[0013] As a preferred solution of the utility model, the cross section of the connecting plate is a concave structure, the cross section of the U-shaped block 1 is a concave structure, and the shape of the front toe rod is an arc structure.

[0014] As a preferred solution of the utility model, the U-shaped block 2 and the U-shaped block 1 are respectively located at two ends of the toe rod, and the off-axis magnetic rotary encoder is located between the crankshaft and the clamping bearing.

[0015] As a preferred solution of the utility model, the controller is located on one side of the pressing block, the electromagnet is a ring structure, and the electromagnet is located on one side of the pressing block.

[0016] Compared with the prior art, the utility model applies reciprocating displacement motion to the crankshaft in the fatigue endurance device for the toe rod, and then the crankshaft drives the middle shaft inside to rotate, and at the same time the middle shaft rotates on the inner wall of the clamping bearing inside, thereby forming a torsion angle for the left sample. The leftmost U-shaped bracket, that is, the second U-shaped block, is a force-applying device, which applies load through a fatigue testing machine to make the sample do axial reciprocating motion. At this time, the sample itself has axial force and torsional force, thereby solving the problem of lack of equipment resources capable of applying torsional loads inside the test device. This deficiency means that when conducting a durability test on the toe rod, it is impossible to fully simulate the complex load conditions that may be encountered in actual driving, especially the influence of torsional stress, and the comprehensiveness and accuracy of the test are not very good.

[0017] The utility model monitors the rotational speed data of the middle shaft by an off-axis magnetic rotary encoder in a fatigue endurance device for the front toe rod. When the front toe rod breaks at its endurance limit, the load on one end of the middle shaft is reduced, the rotational resistance of the middle shaft is reduced, resulting in a change in the rotational speed of the middle shaft, and then the rotational speed data of the middle shaft is changed. At the same time, a controller controls the electromagnet to be energized to generate magnetism, so that the electromagnet and the annular magnet produce magnetic adsorption, and then the annular magnet produces damping on the middle shaft, which has the effect of timely deceleration and stopping of the middle shaft to prevent the front toe rod debris from continuously swinging due to inertia and causing safety problems, thereby solving the problem that the front toe rod is prone to sudden fracture after long-term cyclic loading and reaching its durability limit. The broken front toe rod debris may continue to swing in the equipment due to inertia. At this time, the uncontrolled toe rod fragments will pose a serious threat to surrounding equipment and operators, and may cause secondary damage, which not only increases the risk of damage to the equipment, but also may endanger the personal safety of the testers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the base structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the electromagnet structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the flat key block structure of the utility model.

[0023] In the figure: 1, base; 2, clamping block; 3, clamping bearing; 4, middle shaft; 5, crankshaft; 6, flat key block; 7, flange; 8, connecting plate; 9, U-shaped block one; 10, front toe rod; 11, U-shaped block two; 1201, off-axis magnetic rotary encoder; 1202, controller; 1203, electromagnet; 1204, ring magnet. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] Example: See Figure 1-5 A fatigue resistance device for a front toe rod is shown.

[0026] In this embodiment, specific reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , including a base 1, a clamping block 2 is installed on the opposite inner walls of the base 1, a clamping bearing 3 is installed on the inner wall of the clamping block 2, a central axis 4 is installed on the inner wall of the clamping bearing 3, a crankshaft 5 is installed on the outer wall of the central axis 4, a flat key block 6 is arranged between the crankshaft 5 and the central axis 4, one end of the central axis 4 passes through the clamping bearing 3 and extends to the outer wall of the clamping bearing 3 and is installed with a flange 7, a connecting plate 8 is installed on the outer wall of the flange 7, a U-shaped block 1 9 is installed on the outer wall of the connecting plate 8, a front toe rod 10 is rotatably connected to the inner wall opposite to the U-shaped block 1 9, and one end of the front toe rod 10 is rotatably connected to a U-shaped block 2 11.

[0027] The clamping bearing 3 of the utility model is symmetrically arranged, and the clamping bearing 3 reduces the resistance to the rotation of the central shaft 4 so as to rotate better. A fixing nut is arranged at the bottom of the crankshaft 5, and one end of the fixing nut is threadedly connected to the outer wall 4 of the central shaft, which has a further fixing effect and prevents the crankshaft 5 from generating axial displacement during rotation.

[0028] Furthermore, as a specific implementation of the present invention, the present invention provides a fatigue durability device for a front toe rod.

[0029] In this embodiment, specific reference Figure 1 and Figure 4The fixed component includes an off-axis magnetic rotary encoder 1201 and a controller 1202. The off-axis magnetic rotary encoder 1201 is installed on the inner wall of the base 1. The off-axis magnetic rotary encoder 1201 is located between the crankshaft 5 and the clamping bearing 3. The controller 1202 is installed on the outer wall of the base 1. The controller 1202 is located on one side of the clamping block 2. An electromagnet 1203 is installed on one side of the controller 1202 and on the outer wall of the base 1. The electromagnet 1203 is a ring structure, and the electromagnet 1203 is located on one side of the clamping block 2. A ring magnet 1204 is magnetically connected to the inner wall of the electromagnet 1203, and the ring magnet 1204 is installed on the outer wall of the central axis 4.

[0030] The magnetic ring of the off-axis magnetic rotary encoder 1201 of the utility model is installed on the outer wall of the central axis 4, and the magnetic ring rotates with the central axis 4. At the same time, the sensing end of the off-axis magnetic rotary encoder 1201 is installed on the inner wall of the base 1, and the sensing end of the off-axis magnetic rotary encoder 1201 is located directly above the magnetic ring of the off-axis magnetic rotary encoder 1201 to monitor the rotational speed of the central axis 4.

[0031] Furthermore, as a specific implementation of the present invention, the present invention provides a fatigue durability device for a front toe rod.

[0032] In this embodiment, specific reference Figure 1 and Figure 4 The controller 1202 is respectively connected to the off-axis magnetic rotary encoder 1201 and the electromagnet 1203 through wires, and the connection method is electrical connection. Limit strips are arranged on the opposite side walls of the base 1, and two groups of limit strips are arranged and are respectively located on the opposite side walls of the base 1. The cross section of the base 1 is an inverted π-shaped structure. The clamping blocks 2 are arranged in two groups and are respectively located on the opposite outer walls of the base 1. The clamping bearings 3 are arranged in two groups and are respectively located on the outer walls of the central axis 4. One end of the flat key block 6 is connected to the inner wall of the crankshaft 5, and the other end of the flat key block 6 is connected to the inner wall of the central axis 4. The cross section of the connecting plate 8 is a concave structure, and the cross section of the U-shaped block 19 is a concave structure. The shape of the front toe rod 10 is an arc structure, and the U-shaped block 2 11 and the U-shaped block 19 are respectively located on the opposite outer walls of the front toe rod 10.

[0033] The controller 1202 of the utility model is respectively connected to the off-axis magnetic rotary encoder 1201 and the electromagnet 1203 through wires, and the connection method is electrical connection, so that the device is powered on.

[0034] Furthermore, as a specific implementation of the present invention, the present invention provides a fatigue durability device for a front toe rod.

[0035] When the fatigue endurance device of the front toe rod of the present scheme is working, a clamping bearing 3 is installed on the inner wall of the clamping bearing 3, a middle shaft 4 is installed on the inner wall of the clamping bearing 3, a crankshaft 5 is installed on the outer wall of the middle shaft 4, a flat key block 6 is arranged between the crankshaft 5 and the middle shaft 4, one end of the middle shaft 4 passes through the clamping bearing 3 and extends to the outer wall of the clamping bearing 3. Under the action of the flange 7, it is only necessary for the fatigue testing machine to apply a driving force, thereby driving the crankshaft 5 to apply a reciprocating displacement motion, and then the crankshaft 5 drives the inner middle shaft 4 to rotate, and at the same time, the middle shaft 4 rotates on the inner wall of the clamping bearing 3 inside, a connecting plate 8 is installed on the outer wall of the flange 7, a U-shaped block 9 is installed on the outer wall of the connecting plate 8, a front toe rod 10 is rotatably connected to the inner wall opposite to the U-shaped block 9, and one end of the front toe rod 10 is rotatably connected to the U-shaped Under the action of U-shaped block 11, it is only necessary to install the sample on U-shaped block 11, wherein shaft 4 drives connecting plate 8 to rotate through flange 7, so that connecting plate 8 drives tow rod 10 to rotate through U-shaped block 19, and then tow rod 10 drives U-shaped block 11 to rotate, forming a torsion angle for the left sample. The leftmost U-shaped bracket, that is, U-shaped block 11, is a force-applying device, which applies load through fatigue testing machine to make the sample do axial reciprocating motion. At this time, the sample itself has axial force and torsional force, thereby solving the problem of lack of equipment resources capable of applying torsional load inside the test device. This deficiency means that when conducting durability test of toe rod, it is impossible to fully simulate the complex load conditions that may be encountered in actual driving, especially the influence of torsional stress, and the comprehensiveness and accuracy of the test are not very good.

[0036] Under the action of the off-axis magnetic rotary encoder 1201 installed on the inner wall of the base 1, the off-axis magnetic rotary encoder 1201 monitors the speed data of the middle shaft 4, and the off-axis magnetic rotary encoder 1201 generates an electrical signal which is transmitted to the controller 1202 through a wire. When the endurance limit of the front beam is broken, after it is broken, the load at one end of the middle shaft 4 is reduced, so that when the load is reduced, the rotational resistance of the middle shaft 4 is reduced, resulting in a change in the speed of the middle shaft 4, thereby causing the speed data of the middle shaft 4 to change. At the same time, the controller 1202 controls the electromagnet 1203 to generate magnetism, so that the electromagnet 1203 and the annular magnetic Iron 1204 produces magnetic adsorption, which in turn causes the annular magnet 1204 to produce damping on the central axis 4, thereby achieving the effect of timely deceleration and stopping of the central axis 4 to prevent the toe rod debris from continuing to swing due to inertia and causing safety problems, thereby solving the problem that the toe rod is prone to sudden fracture after long-term cyclic loading and reaching its durability limit. The fractured toe rod debris may continue to swing in the equipment due to inertia. At this time, the uncontrolled toe rod fragments will pose a serious threat to surrounding equipment and operators and may cause secondary damage, which not only increases the risk of equipment damage but may also endanger the personal safety of testers.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue resistance device for a toe rod, comprising a base (1), characterized in that: A clamping block (2) is installed on the opposite outer walls of the base (1), a clamping bearing (3) is installed on the inner wall of the clamping block (2), a central shaft (4) is installed on the inner wall of the clamping bearing (3), a crankshaft (5) is installed on the outer wall of the central shaft (4), a flat key block (6) is arranged between the crankshaft (5) and the central shaft (4), one end of the central shaft (4) passes through the clamping bearing (3) and a flange (7) is installed on the end, a connecting plate (8) is installed on the outer wall of the flange (7), a U-shaped block 1 (9) is installed on the outer wall of the connecting plate (8), a front toe rod (10) is rotatably connected to the inner wall of the U-shaped block 1 (9), and one end of the front toe rod (10) is rotatably connected to a U-shaped block 2 (11).

2. A fatigue resistance device for a front toe rod according to claim 1, characterized in that: The invention also comprises a fixing component, the fixing component comprising an off-axis magnetic rotary encoder (1201) and a controller (1202), the off-axis magnetic rotary encoder (1201) being mounted on a base (1), the controller (1202) being mounted on an outer wall of the base (1), an electromagnet (1203) being mounted on one side of the controller (1202) and located on the outer wall of the base (1), an annular magnet (1204) being magnetically connected to the inner wall of the electromagnet (1203), and the annular magnet (1204) being mounted on the outer wall of the central axis (4).

3. A fatigue resistance device for a front toe rod according to claim 2, characterized in that: The controller (1202) is electrically connected to an off-axis magnetic rotary encoder (1201) and an electromagnet (1203) via wires, and limit bars are arranged on opposite side walls of the base (1). Two groups of limit bars are arranged and are respectively located on opposite side walls of the base (1).

4. A fatigue resistance device for a front toe rod according to claim 1, characterized in that: The cross section of the base (1) is an inverted π-shaped structure, the clamping blocks (2) are provided in two groups and are respectively located on opposite outer walls of the base (1), and the clamping bearings (3) are provided in two groups and are respectively located on the outer walls of the central shaft (4).

5. The fatigue resistance device for a front toe rod according to claim 1, characterized in that: One end of the flat key block (6) is connected to the inner wall of the crankshaft (5), and the other end of the flat key block (6) is connected to the inner wall of the center shaft (4).

6. The fatigue resistance device for a front toe rod according to claim 1, characterized in that: The cross section of the connecting plate (8) is a concave structure, the cross section of the U-shaped block 1 (9) is a concave structure, and the shape of the front toe rod (10) is an arc structure.

7. The fatigue resistance device for a front toe rod according to claim 2, characterized in that: The U-shaped block 2 (11) and the U-shaped block 1 (9) are respectively located at two ends of the toe rod (10), and the off-axis magnetic rotary encoder (1201) is located between the crankshaft (5) and the clamping bearing (3).

8. The fatigue resistance device for a front toe rod according to claim 2, characterized in that: The controller (1202) is located on one side of the pressing block (2); the electromagnet (1203) is a ring-shaped structure, and the electromagnet (1203) is located on one side of the pressing block (2).

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