A whole vehicle torsion endurance test device

Abstract

The utility model discloses a whole vehicle torsional endurance test device, include: car body fixed device for with certain attitude fixed car body, loading mechanism, including support, swing frame and actuator, swing frame extends along the left and right width direction of car body, and the middle position of swing frame is equipped with the pivot, and the axis of pivot extends along the front and back longitudinal direction of car body, and swing frame is installed on support through pivot, and actuator is used for driving swing frame to reciprocate swing within a certain amplitude around pivot, and swing frame forms the first loading end for loading the left side wheel position of car body on the side of pivot, and swing frame forms the second loading end for loading the right side wheel position of car body on the other side of pivot, the utility model discloses ingenious through swing frame and converts the drive of actuator into chassis torsional loading force, can verify chassis and car body installation department (connecting position) torsional endurance performance, make up the deficiency that original only can verify chassis part endurance performance.

Description

Technical Field

[0001] This utility model is used in the field of vehicle testing, and in particular relates to a whole vehicle torsional durability testing device. Background Technology

[0002] During the research and development of automobiles, extensive durability tests are required to verify the performance of components such as chassis, suspension, and body in terms of fatigue, durability, and lifespan. Existing technologies include dedicated durability testing devices for chassis. These devices can fix the chassis assembly on a bench fixture and conduct durability tests on the chassis under specified loads using hydraulic devices. However, this type of durability testing device has the following shortcomings: 1. It can only verify the durability performance of chassis components and cannot verify the durability performance of the entire vehicle after the chassis is connected to the body; 2. Durability testing requires the use of multiple hydraulic cylinders, resulting in high cost and low efficiency.

[0003] In summary, the problems existing in the relevant technologies urgently need to be solved. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art and to provide a whole vehicle torsion durability testing device.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A vehicle torsion durability testing apparatus, comprising:

[0007] Vehicle body fixing device, used to fix the vehicle body in a certain posture;

[0008] The loading mechanism includes a support, a swing frame, and an actuator. The swing frame extends along the left-right width direction of the vehicle body. A pivot is provided at the middle of the swing frame, and the axis of the pivot extends along the front-rear longitudinal direction of the vehicle body. The swing frame is mounted on the support via the pivot. The actuator is used to drive the swing frame to swing back and forth around the pivot within a certain range. The swing frame forms a first loading end on one side of the pivot for loading the left wheel position of the vehicle body, and forms a second loading end on the other side of the pivot for loading the right wheel position of the vehicle body.

[0009] In some implementations, the loading mechanism includes a first wheel center loading fixture and a second wheel center loading fixture. The first wheel center loading fixture has a wheel hub bolt mounting hole for connecting to the left steering knuckle of the vehicle chassis, and the second wheel center loading fixture has a wheel hub bolt mounting hole for connecting to the right steering knuckle of the vehicle chassis. The first loading end is connected to the first wheel center loading fixture, and the second loading end is connected to the second wheel center loading fixture.

[0010] In some implementations, the loading mechanism includes a first link and a second link, with the two ends of the first link hinged to the first wheel center loading fixture and the first loading end, respectively, and the two ends of the second link hinged to the second wheel center loading fixture and the second loading end, respectively.

[0011] In some implementations, the swing frame is an isosceles triangle, the pivot is located at the apex of the swing frame, the first loading end is located at one base corner of the swing frame, and the second loading end is located at the other base corner of the swing frame.

[0012] In some implementations, in conjunction with the above methods, the support is provided with a bearing, the rotating shaft is mounted on the bearing, the loading mechanism further includes a drive arm fixedly connected to the rotating shaft, the drive arm is coaxially connected to the swing frame through the rotating shaft, the drive arm extends radially along the rotating shaft, and the actuator is connected to the drive arm.

[0013] In some implementations, in conjunction with the above implementations, the output end of the actuator is connected to the drive arm via a third link, with the two ends of the third link respectively hinged to the output end of the actuator and the drive arm.

[0014] In some implementations, in conjunction with the above methods, a force sensor is provided at the output end of the actuator.

[0015] In some implementations, the actuator includes a hydraulic cylinder, in conjunction with the above-described implementation methods.

[0016] In some implementations, the vehicle body fixing device supports the vehicle body at a certain height, and the loading mechanism is used to apply vertical loading from below the vehicle body.

[0017] In some implementations, the vehicle body fixing device includes multiple assembled square box fixtures, each with honeycomb mounting holes. The vehicle body fixing device can be installed at the battery pack mounting point at the bottom of the vehicle body through the honeycomb mounting holes of the top square box fixture.

[0018] One of the above technical solutions has at least one of the following advantages or beneficial effects: This utility model can be used for torsional durability testing of the chassis and body mounting parts (connection positions). During the test, the body is fixed by a body fixing device, and then an actuator drives a swing frame to swing back and forth around a rotation axis within a certain range. The swing frame further loads the left and right wheel positions of the body through the first loading end and the second loading end, thereby simulating the fatigue damage of the chassis torsional load during vehicle operation. This utility model cleverly converts the actuator's drive into chassis torsional loading force through the swing frame, which can verify the torsional durability performance of the chassis and body mounting parts (connection positions), making up for the shortcomings of the original method which could only verify the durability performance of chassis components.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the usage state of one embodiment of this utility model. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0025] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0026] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0027] in, Figure 2 The reference direction coordinate system of this utility model embodiment is given below, in conjunction with Figure 2 The embodiments of this utility model will be described in the directions shown.

[0028] See Figure 1 , Figure 2 This utility model provides a vehicle torsional durability testing device, including a vehicle body fixing device 100 and a loading mechanism 200. The vehicle body fixing device 100 is used to fix the vehicle body 300 in a certain posture to maintain the stability of the vehicle body 300 during the test. The loading mechanism 200 is used to load the chassis installed on the vehicle body 300, and the loading follows a preset load spectrum, such as load magnitude, frequency, number of cycles, etc. The loading mechanism 200 includes a support 201, a swing frame 202, and an actuator 203. The swing frame 202 extends along the left-right width direction of the vehicle body 300. A pivot is located at the middle of the swing frame 202, and the axis of the pivot extends along the front-rear longitudinal direction of the vehicle body 300. The swing frame 202 is mounted on the support 201 via the pivot. The actuator 203 serves as a power source, driving the swing frame 202 to reciprocate around the pivot within a certain range. A first loading end 204 is formed on one side of the pivot for loading the left wheel position of the vehicle body 300, and a second loading end 205 is formed on the other side of the pivot for loading the right wheel position of the vehicle body 300. The swing frame 202 forms a seesaw structure via the pivot in the middle, allowing the first loading end 204 and the second loading end 205 to be staggered and synchronized, converting the driving force of the actuator 203 into a test loading force on the chassis of the vehicle body 300.

[0029] Combination Figure 1 , Figure 2 This invention can be used for torsional durability testing of the chassis and body mounting section (connection location). During the test, the body 300 with the chassis mounted is fixed by the body fixing device 100. Then, the actuator 203 drives the swing frame 202 to swing back and forth around the axis within a certain range. The swing frame 202 further loads the left and right wheel positions of the body 300 through the first loading end 204 and the second loading end 205, thereby simulating the fatigue damage of the frame torsional load during vehicle operation. This invention cleverly converts the drive of the actuator 203 into chassis torsional loading force through the swing frame 202, which can verify the torsional durability performance of the chassis and body mounting section (connection location), making up for the shortcomings of the original method which could only verify the durability performance of chassis components.

[0030] The technical solution of this utility model can meet the durability test requirements of different vehicle conditions. For example, when the chassis of the vehicle is equipped with wheels, the swing frame 202 can directly or indirectly apply the loading force to the wheels, and on this basis, complete the torsional durability test of the whole vehicle and verify the torsional durability performance of the chassis and body mounting part (connection position).

[0031] Even when the chassis of the vehicle is not fitted with wheels, the technical solution of this utility model can still undergo durability testing. See [link / reference]. Figure 1 , Figure 2 In some embodiments, the loading mechanism 200 includes a first wheel center loading clamp 206 and a second wheel center loading clamp 207. The first wheel center loading clamp 206 is provided with a wheel hub bolt mounting hole for connecting to the left steering knuckle of the vehicle body 300 chassis, and the second wheel center loading clamp 207 is provided with a wheel hub bolt mounting hole for connecting to the right steering knuckle of the vehicle body 300 chassis. The first loading end 204 is connected to the first wheel center loading clamp 206, and the second loading end 205 is connected to the second wheel center loading clamp 207. During the durability test, the first wheel center loading fixture 206 can be installed on the left steering knuckle of the chassis 300 like a wheel through its hub bolt mounting holes, and the second wheel center loading fixture 207 can be installed on the right steering knuckle of the chassis 300 like a wheel through its hub bolt mounting holes. The driving force of the actuator 203 is converted into a reciprocating swing loading force through the swing frame 202, and then further acts on the chassis 300 through the first wheel center loading fixture 206 and the second wheel center loading fixture 207 to realize the loading of the test torsional force.

[0032] The first loading end 204 can be directly or indirectly connected to the first wheel center loading fixture 206, and the second loading end 205 can be directly or indirectly connected to the second wheel center loading fixture 207. See also the following embodiments: Figure 1 , Figure 2The loading mechanism 200 includes a first link 208 and a second link 209. The two ends of the first link 208 are hinged to a first wheel center loading fixture 206 and a first loading end 204, respectively. The two ends of the second link 209 are hinged to a second wheel center loading fixture 207 and a second loading end 205, respectively. In this embodiment, the first link 208 is positioned between the first loading end 204 and the first wheel center loading fixture 206, and the second link 209 is positioned between the second loading end 205 and the second wheel center loading fixture 207. Furthermore, the hinged structure at both ends of the first link 208 and the second link 209 enables the transmission of thrust and tension between the first loading end 204 and the first wheel center loading fixture 206, and between the second loading end 205 and the second wheel center loading fixture 207, thereby better simulating the torsional load during vehicle operation.

[0033] The swing frame 202 can be configured as a rod or a frame; see [reference needed] in some embodiments. Figure 1 , Figure 2 The swing frame 202 is an isosceles triangle, with the pivot located at the apex. The first loading end 204 is located at one base corner, and the second loading end 205 is located at the other base corner. In other words, the swing frame 202 adopts an isosceles triangular frame structure with a base frame and two inclined side frames. The apex of the inclined side frames forms the fulcrum for mounting the pivot, while the first loading end 204 and the second loading end 205 are respectively located near the two base corners of the isosceles triangle. In this embodiment, the triangular frame structure of the swing frame 202 effectively improves its structural strength and can meet different test loads. Simultaneously, the inclined side frames prevent interference with the ground during reciprocating swing.

[0034] The actuator 203 can be directly connected to the rocker frame 202 to drive the rocker frame 202 to reciprocate around the pivot.

[0035] In some embodiments, see Figure 1 , Figure 2 The support 201 is equipped with a bearing, and the rotating shaft is mounted on the bearing. The loading mechanism 200 also includes a drive arm 210 fixedly connected to the rotating shaft. The drive arm 210 is coaxially connected to the swing frame 202 via the rotating shaft. The drive arm 210 extends radially along the rotating shaft, and the actuator 203 is connected to the drive arm 210. In this embodiment, the drive arm 210 is independent of the swing frame 202 and is coaxially connected to the swing frame 202 via the rotating shaft. The actuator 203 can drive the drive arm 210 to reciprocate around the rotating shaft, further driving the swing frame 202 to reciprocate, thereby converting the reciprocating extension and retraction driving force of the actuator 203 into the reciprocating swing of the swing frame 202. In this embodiment, the drive arm 210 can amplify the loading force ultimately applied by the actuator 203 to the first wheel center loading fixture 206 and the second wheel center loading fixture 207.

[0036] Further, see Figure 1 , Figure 2 The actuator 203 is mounted on the bracket 211. The output end of the actuator 203 is connected to the drive arm 210 via a third link 212. The two ends of the third link 212 are respectively hinged to the output end of the actuator 203 and the drive arm 210. The output end of the actuator 203 is equipped with a force sensor 213 to detect the driving force of the actuator 203, so as to adjust the driving force of the actuator 203 according to the preset load.

[0037] The actuator 203 can be a hydraulic cylinder, a pneumatic cylinder, an electric push rod, etc.

[0038] The vehicle body fixing device 100 can use a vehicle body 300 fixing clamp to fix the vehicle body 300 in a certain posture. For example, the bottom of the vehicle body 300 can be fixed at a certain height, or the bottom of the vehicle body 300 can be laterally fixed to one side. In some embodiments, see [reference needed]. Figure 2 The vehicle body fixing device 100 supports the vehicle body 300 at a certain height, and the loading mechanism 200 is used to apply vertical loading from below the vehicle body 300.

[0039] Further, see Figure 1 , Figure 2 The vehicle body fixing device 100 includes multiple assembled square box fixtures 101. Each square box fixture 101 has honeycomb mounting holes. The vehicle body fixing device 100 can be installed onto the battery pack mounting point at the bottom of the vehicle body 300 through the honeycomb mounting holes of the top square box fixture 101. The vehicle body fixing device 100 is formed by assembling multiple square box fixtures; this modular fixture design meets the fixing requirements of different vehicle models. In this embodiment, after the square box fixture 101 is adapted and connected to the vehicle battery pack mounting interface, it is positioned and fixed to the iron platform, constructing a stable support benchmark for the entire vehicle frame.

[0040] Compared to existing technologies, this invention can verify the torsional durability performance of the chassis and body mounting section (connection point), overcoming the limitation of previous methods that could only verify the durability performance of chassis components. Furthermore, it can simultaneously perform torsional durability tests on the front and rear frames, significantly shortening the testing cycle. In addition, the seesaw-type swing frame 202 converts the lateral force of the actuator 203 into chassis torsional force, eliminating the need for dual hydraulic cylinders and effectively reducing costs.

[0041] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A whole vehicle torsion durability testing device, characterized in that, include: Vehicle body fixing device, used to fix the vehicle body in a certain posture; The loading mechanism includes a support, a swing frame, and an actuator. The swing frame extends along the left-right width direction of the vehicle body. A pivot is provided at the middle of the swing frame, and the axis of the pivot extends along the front-rear longitudinal direction of the vehicle body. The swing frame is mounted on the support via the pivot. The actuator is used to drive the swing frame to swing back and forth around the pivot within a certain range. The swing frame forms a first loading end on one side of the pivot for loading the left wheel position of the vehicle body, and forms a second loading end on the other side of the pivot for loading the right wheel position of the vehicle body.

2. The vehicle torsion durability testing apparatus according to claim 1, characterized in that, The loading mechanism includes a first wheel center loading clamp and a second wheel center loading clamp. The first wheel center loading clamp is provided with a wheel hub bolt mounting hole for connecting to the left steering knuckle of the vehicle chassis. The second wheel center loading clamp is provided with a wheel hub bolt mounting hole for connecting to the right steering knuckle of the vehicle chassis. The first loading end is connected to the first wheel center loading clamp, and the second loading end is connected to the second wheel center loading clamp.

3. The vehicle torsion durability testing apparatus according to claim 2, characterized in that, The loading mechanism includes a first link and a second link. The two ends of the first link are respectively hinged to the first wheel center loading fixture and the first loading end, and the two ends of the second link are respectively hinged to the second wheel center loading fixture and the second loading end.

4. The vehicle torsion durability testing apparatus according to claim 2, characterized in that, The swing frame is in the shape of an isosceles triangle, the pivot is located at the top corner of the swing frame, the first loading end is located at one bottom corner of the swing frame, and the second loading end is located at the other bottom corner of the swing frame.

5. The vehicle torsion durability testing apparatus according to claim 2, characterized in that, The support is provided with a bearing, the rotating shaft is mounted on the bearing, the loading mechanism also includes a drive arm fixedly connected to the rotating shaft, the drive arm is coaxially connected to the swing frame through the rotating shaft, the drive arm extends radially along the rotating shaft, and the actuator is connected to the drive arm.

6. The vehicle torsion durability testing apparatus according to claim 5, characterized in that, The output end of the actuator is connected to the drive arm via a third link, and the two ends of the third link are respectively hinged to the output end of the actuator and the drive arm.

7. The vehicle torsion durability testing apparatus according to claim 1, characterized in that, The actuator is equipped with a force sensor at its output end.

8. The whole vehicle torsion durability testing apparatus according to claim 1, characterized in that, The actuator includes a hydraulic cylinder.

9. The vehicle torsion durability testing apparatus according to claim 1, characterized in that, The vehicle body fixing device supports the vehicle body at a certain height, and the loading mechanism is used to apply vertical loading from below the vehicle body.

10. The vehicle torsion durability testing apparatus according to claim 9, characterized in that, The vehicle body fixing device includes multiple spliced ​​square box fixtures, each with honeycomb mounting holes. The vehicle body fixing device can be installed at the battery pack mounting point at the bottom of the vehicle body through the honeycomb mounting holes of the top square box fixture.

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