Automobile suspension spring durability test equipment and test method

Abstract

A vehicle suspension spring durability test device comprises a frame (1), on which a test device and a clamping device for replaceable suspension springs are provided. When the vehicle suspension spring durability test device of the present invention is used to test the durability of a suspension spring, when a sampled suspension spring fails to meet the standard and loses its elasticity prematurely, a new suspension spring to be tested can be replaced to avoid vacancies at the monitoring location, thereby having a higher detection efficiency than the prior art. Correspondingly, the present invention also provides a vehicle suspension spring durability test method, which is implemented on the vehicle suspension spring durability test device of the present invention and has a high detection efficiency.

Description

Technical Field

[0001] The invention relates to automobile suspension spring testing technology, in particular to automobile suspension spring durability testing equipment and a testing method. Background Art

[0002] Automobile suspension springs are elastic elements in automobile suspensions, which make elastic connections between the axle and the frame or body, bear and transmit vertical loads, and mitigate and suppress the impact caused by uneven roads. Automobile suspension springs are tested many times before leaving the factory to ensure the product quality of the suspension springs. One of the tests is the durability test of the suspension springs, which is used to test the life of the suspension springs. The test process is time-consuming and is limited by existing testing equipment. Unqualified springs are generally not taken out and replaced midway, leaving vacancies at the test site. The replacement cannot be well connected during the test, resulting in low test efficiency. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides an automobile suspension spring durability test device. When the automobile suspension spring durability test device of the present invention is used to perform durability testing on suspension springs, when the sampled suspension springs fail to meet the standards and lose elasticity in advance, new suspension springs to be tested can be replaced to avoid vacancies at the monitoring location, thereby having higher detection efficiency than the prior art. Correspondingly, the present invention also provides an automobile suspension spring durability test method, which is implemented on the automobile suspension spring durability test device of the present invention and has a high detection efficiency.

[0004] For the detection equipment, the present invention provides the following technical solutions:

[0005] The durability testing equipment for automobile suspension springs comprises a frame on which a testing device and a clamping device for replaceable suspension springs are arranged; the testing device comprises an upper testing platen and a lower testing platen which can slide in the vertical direction, and a reciprocating mechanism for driving the upper testing platen and the lower testing platen; the reciprocating mechanism comprises an A motor and a driving plate which can be driven by the A motor to make reciprocating motion in the vertical direction, and the upper testing platen and the lower testing platen are respectively arranged on both sides of the driving plate; the clamping device comprises a fixed notched circular plate, and the ends of the upper testing platen and the lower testing platen extend into the notch on the notched circular plate; an upper circular plate and a lower circular plate are respectively arranged above and below the notched circular plate; a rotatable A positioning shaft and a B positioning shaft are respectively arranged on the upper and lower sides of the notched circular plate Correspondingly, the upper circular plate and the lower circular plate are respectively provided with a B motor and a C motor for driving the A positioning shaft and the B positioning shaft to rotate; the lower side of the upper circular plate is provided with an upper spring fixing plate that can be driven to rotate by the B motor; the lower side of the upper spring fixing plate is provided with a plurality of A spring fixing single plates that slide with the A positioning shaft, and a suspension spring can be installed between each A spring fixing single plate and the upper spring fixing plate; the upper side of the lower circular plate is provided with a lower spring fixing plate that can be driven to rotate by the C motor; the upper side of the lower spring fixing plate is provided with a plurality of B spring fixing single plates that slide with the B positioning shaft, and a suspension spring can be installed between each B spring fixing single plate and the lower spring fixing plate; pressure sensors are provided in the A spring fixing single plate and the B spring fixing single plate.

[0006] Compared with the prior art, the automobile suspension spring durability testing equipment of the present invention has a clamping device for replacing the suspension spring. During the test, if the sampled suspension spring does not meet the standard and loses its elasticity prematurely, the motor can be used to drive the spring fixing plate and the corresponding spring fixing plate to rotate, and replace the new spring to be tested (the suspension spring that has been clamped and is to be tested is sent to the testing position), which will not reduce the test efficiency and will not affect other springs that are still being tested. At the same time, after the suspension spring passes the test, it can also be automatically replaced by a new spring to be tested, thereby improving the overall test efficiency and reducing the workload of workers.

[0007] As an optimization, in the aforementioned automobile suspension spring durability test equipment, the rotating shaft of the B motor is connected to the A positioning shaft via a key; the rotating shaft of the C motor is connected to the B positioning shaft via a key. The transmission connection is achieved through keys, which is simple, reliable, and easy to implement. Furthermore, the upper circular plate can be driven by the D motor to adjust its position vertically, and the lower circular plate can be driven by the E motor to adjust its position vertically. Thus, the positions of the upper circular plate and the lower circular plate can be adjusted to accommodate suspension springs of different specifications, so that the detection equipment of the present invention has a wider range of applications.

[0008] As an optimization, in the above-mentioned automobile suspension spring durability test equipment, the upper test platen is provided with an upper single plate limit block, and the A spring fixed single plate is provided with an arc groove for cooperating with the upper single plate limit block; the lower test platen is provided with a lower single plate limit block, and the B spring fixed single plate is provided with an arc groove for cooperating with the lower single plate limit block. The limit cooperation formed by the single plate limit block and the arc groove plays a role in preventing the spring fixed single plate from flipping displacement. The friction between the single plate and the positioning shaft during sliding is small, so that the spring fixed single plate slides more smoothly relative to the positioning shaft, and the related parts are not easy to wear and have a long service life.

[0009] As an optimization, in the aforementioned automobile suspension spring durability test equipment, an electromagnet is provided in the notch of the notch circular plate, and correspondingly, the end of the lower test plate has ferromagnetism. Thus, when there is no test task (initial state), the lower test plate can be attracted by magnetic force to prevent it from falling.

[0010] As an optimization, in the aforementioned automobile suspension spring durability test equipment, the clamping devices have two, which are arranged on both sides of the driving plate in a mirror relationship; the two ends of the upper test platen and the lower test platen extend into the notches on the notched circular plates of the two clamping devices respectively. By setting the two clamping devices in a mirrored manner, the left and right forces of the test platen are balanced, the friction between the test platen and the guide parts is small, the sliding is smoother, and the related parts are not easy to wear and have a long service life.

[0011] As an optimization, in the aforementioned automobile suspension spring durability test equipment, the reciprocating mechanism further includes a turntable and a connecting rod, the turntable is connected to the A motor by transmission, one end of the connecting rod is connected to the connecting block on the turntable through a slewing auxiliary structure, and the slewing axis has an eccentricity relative to the rotating axis of the turntable, and the other end of the connecting rod is hinged to the driving plate. The reciprocating mechanism adopts the above design, the structure is reliable, and it is easy to implement.

[0012] Furthermore, the connection block can be adjusted relative to the turntable, so that the eccentricity of the rotary shaft in the rotary auxiliary structure relative to the turntable shaft can be adjusted. Thus, the compression stroke during the spring test can be adjusted as needed, making the device of the present invention more applicable.

[0013] Furthermore, the A motor is connected to the rotating shaft of the turntable through a speed reduction mechanism. This design is conducive to reducing energy consumption.

[0014] For the detection method, the present invention provides the following technical solutions:

[0015] A method for testing the durability of an automobile suspension spring is implemented on the aforementioned automobile suspension spring durability testing device of the present invention.

[0016] When the method of the present invention is used for detection, the pressure sensor and each motor are electrically connected to the control terminal; the pressure sensor will detect a signal when the suspension spring is compressed and feed it back to the control terminal. The control terminal will leave a record only when the spring feedback force is greater than a certain value, record the number of times, and when the count accumulates to a certain value, it is judged to be qualified. If the spring feedback force is less than a certain value, it is judged to be unqualified. Both qualified and unqualified situations will trigger the corresponding motor action to replace the new spring to be detected; the specific replacement process is as follows: when the suspension spring on the A spring fixing single plate in the detection position does not meet the standard or meets the standard, the B motor will start when the lower test pressure plate is pushed to rotate the upper spring fixing plate and the A positioning shaft, thereby realizing the switching of the suspension spring; when the suspension spring on the B spring fixing single plate in the detection position does not meet the standard or meets the standard, the C motor will start when the upper test pressure plate is pushed to rotate the lower spring fixing plate and the B positioning shaft, thereby realizing the switching of the suspension spring.

[0017] Compared with the prior art, the detection method of the present invention is used in the aforementioned automobile suspension spring durability test equipment of the present invention. When a qualified or unqualified spring is judged, a new spring to be tested is replaced in time to avoid a window period, thereby improving the overall detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a vehicle suspension spring durability testing device according to an embodiment of the present invention (with the suspension spring clamped).

[0019] Figure 2 Is a schematic diagram of the drive block assembly structure embodiment of the present invention;

[0020] Figure 3 is a front view of an automobile suspension spring durability testing device according to an embodiment of the present invention;

[0021] Figure 4 yes Figure 3 Enlarged schematic diagram of the middle AA direction;

[0022] Figure 5 yes Figure 3 Enlarged schematic diagram of the middle BB direction;

[0023] Figure 6 yes Figure 3 Enlarged schematic diagram of the CC direction;

[0024] Figure 7 is a schematic diagram of the assembly structure of the positioning shaft in an embodiment of the present invention;

[0025] Figure 8 1 is an assembly relationship diagram of the A spring fixing single plate and the upper test platen in an embodiment of the present invention;

[0026] Fig. 9 1 is an assembly relationship diagram of the B spring fixing single plate and the lower test plate in an embodiment of the present invention;

[0027] Fig.10 It is a structural schematic diagram of the back side of the automobile suspension spring durability testing equipment in an embodiment of the present invention.

[0028] The markings in the attached drawings are: 1-frame; 2-upper test platen; 3-lower test platen; 4-A motor; 5-drive plate; 6-notched circular plate; 7-upper circular plate; 8-lower circular plate; 9-A positioning shaft; 10-B positioning shaft; 11-B motor; 12-C motor; 13-upper spring fixing plate; 14-A spring fixing single plate; 15-lower spring fixing plate; 16-B spring fixing single plate; 17-D motor; 18-E motor; 19-turntable; 20-connecting rod; 21-connecting block; 22-upper single plate limit block; 23-lower single plate limit block; 24-electromagnet; 25-pressure sensor. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but is not intended to be limiting of the present invention. In the following embodiments, all that is not described in detail is conventional technical means or technical common sense in the art.

[0030] See also Figure 1-10 The present invention provides a vehicle suspension spring durability test device, which includes a frame 1, on which a test device and a clamping device that can replace the suspension spring are provided; when working, the suspension spring is compressed by the clamping device and the test device for testing. When there is a vacancy in the detection position (the detection has been completed or the detection is unqualified), a new suspension spring to be detected can be replaced, thereby avoiding a blank period and improving the overall detection efficiency.

[0031] In the solution of the present invention, the test device includes an upper test platen 2 and a lower test platen 3 that can slide in the vertical direction, and a reciprocating mechanism for driving the upper test platen 2 and the lower test platen 3; the reciprocating mechanism includes an A motor 4 and a driving plate 5 that can be driven by the A motor 4 to make a reciprocating motion in the vertical direction, and the upper test platen 2 and the lower test platen 3 are respectively located on both sides of the driving plate 5. When working, the driving plate 5 makes a reciprocating motion up and down under the drive of the A motor 4.

[0032] In the scheme of the present invention, the clamping device includes a fixed notched circular plate 6, and the ends of the upper test plate 2 and the lower test plate 3 extend into the notch on the notched circular plate 6; an upper circular plate 7 and a lower circular plate 8 are respectively provided above and below the notched circular plate 6; the upper and lower sides of the notched circular plate 6 are respectively provided with a rotatable A positioning shaft 9 and a B positioning shaft 10, and correspondingly, the upper circular plate 7 and the lower circular plate 8 are respectively provided with a B motor 11 and a C motor 12 for driving the A positioning shaft 9 and the B positioning shaft 10 to rotate, and the lower side of the upper circular plate 7 is provided with an upper spring fixing plate 13 that can be driven to rotate by the B motor 11, and the upper spring fixing plate 1 3 is provided with a plurality of A spring fixing single plates 14 (three in the embodiment shown in the accompanying drawings) which are slidably matched with the A positioning shaft 9, and a suspension spring can be installed between each A spring fixing single plate 14 and the upper spring fixing plate 13; a lower spring fixing plate 15 which can be driven to rotate by the C motor 12 is provided on the upper side of the lower circular plate 8, and a plurality of B spring fixing single plates 16 which are slidably matched with the B positioning shaft 10 are provided above the lower spring fixing plate 15, and a suspension spring can be installed between each B spring fixing single plate 16 and the lower spring fixing plate 15; pressure sensors 25 are provided in the A spring fixing single plate 14 and the B spring fixing single plate 16. During operation, when the driving plate 5 makes an up-and-down reciprocating motion, when the driving plate 5 moves upward from the height position of the notched circular plate 6, it will push the upper test plate 2 to move upward, and then the upper test plate 2 will push the A spring fixed single plate 14 in the detection position (i.e., above the notch of the notched circular plate 6) to move upward. The A spring fixed single plate 14 moves upward, compressing the suspension spring on the A spring fixed single plate 14. When the driving plate 5 returns downward, the A spring fixed single plate 14 is reset under the elastic force of the suspension spring. When the driving plate 5 moves downward from the height position of the notched circular plate 6, it will push the lower test plate 3 to move downward, and then the lower test plate 3 will push the B spring fixed single plate 16 in the detection position (i.e., below the notch of the notched circular plate 6) to move downward. During the downward movement of the B spring fixed single plate 16, the suspension spring on the B spring fixed single plate 16 is compressed. When the driving plate 5 returns upward, the B spring fixed single plate 16 is reset under the elastic force of the suspension spring.

[0033] During the test, the pressure sensor 25 and each motor are electrically connected to the control terminal. The pressure sensor 25 will detect the signal when the suspension spring is compressed and feed it back to the control terminal. The control terminal will leave a record only when the spring feedback force is greater than a certain value. The number of times is recorded, and when the count accumulates to a certain value, it is judged as qualified. If the spring feedback force is less than a certain value, it is judged as unqualified. In both cases of qualified or unqualified, the corresponding motor (B motor 11, C motor 12) will be triggered to replace the new spring to be tested. The specific replacement process is as follows: When the suspension spring on the A spring fixing plate 14 in the detection position does not meet the standard or meets the standard (both cases will cause the number of times to be reset to zero), the B motor 11 will start when the lower test plate 3 is pushed, thereby rotating the upper spring fixing plate 13 and the A positioning shaft 9, thereby realizing the switching of the suspension spring; when the suspension spring on the B spring fixing plate 16 in the detection position does not meet the standard or meets the standard (both cases will cause the number of times to be reset to zero), the C motor 12 will start when the upper test plate 2 is pushed, thereby rotating the lower spring fixing plate 15 and the B positioning shaft 10, thereby realizing the switching of the suspension spring. By switching to a new suspension spring to be tested when the test is qualified or unqualified, the existence of a blank period is prevented, so that the test can be seamlessly connected, and the overall test efficiency is improved. (After the switching action is completed, the suspension spring that is judged to be qualified or unqualified is switched to the non-test position, removed by the worker, and then a new spring to be tested is installed at this position and waits for testing)

[0034] Example (see Figure 1-10 ):

[0035] In this embodiment: the rotating shaft of the B motor 11 is connected to the A positioning shaft 9 by a key; the rotating shaft of the C motor 12 is connected to the B positioning shaft 10 by a key. The motor and the positioning shaft are connected by a key, the structure is simple and reliable, and the motor rotating shaft and the positioning shaft can slide relative to each other in the axial direction, which provides the possibility to adapt to suspension springs of different specifications. The upper circular plate 7 can be driven by the D motor 17 to adjust the position in the vertical direction, and the lower circular plate 8 can be driven by the E motor 18 to adjust the position in the vertical direction. When in use, the positions of the upper circular plate 7 and the lower circular plate 8 can be adjusted to adapt to suspension springs of different specifications.

[0036] In this embodiment: the upper test plate 2 is provided with an upper single board stopper 22, and the A spring fixed single board 14 is provided with an arc groove for cooperating with the upper single board stopper 22; the lower test plate 3 is provided with a lower single board stopper 23, and the B spring fixed single board 16 is provided with an arc groove for cooperating with the lower single board stopper 23. The spring fixed single board is limited by the single board stopper, and during the test, the friction between the spring fixed single board and the positioning shaft is small, and the sliding is smoother.

[0037] In this embodiment, an electromagnet 24 is provided in the notch of the notch circular plate 6, and correspondingly, the end of the lower test plate 3 is ferromagnetic. In the initial state, the electromagnet 24 is in the on state, and the lower circular plate 8 is adsorbed by the electromagnet 24 to prevent the lower circular plate 8 from falling.

[0038] In this embodiment: there are two clamping devices, which are arranged on both sides of the driving plate 5 in a mirror relationship; the two ends of the upper test plate 2 and the lower test plate 3 extend into the notches on the notched circular plates 6 of the two clamping devices respectively. Two clamping devices are provided (four suspension springs are tested at the same time), the detection efficiency is high, the force is reasonable, and the operation is smoother.

[0039] In this embodiment: the reciprocating mechanism also includes a turntable 19 and a connecting rod 20, the turntable 19 is transmission-connected to the A motor 4, one end of the connecting rod 20 is connected to the connecting block 21 on the turntable 19 through a rotary substructure, and the rotary axis has an eccentricity relative to the rotary axis of the turntable 19, and the other end of the connecting rod 20 is hinged to the drive plate 5.

[0040] In this embodiment, the connection block 21 can be adjusted relative to the rotating disk 19, so that the eccentricity of the rotating shaft in the rotating auxiliary structure relative to the rotating shaft of the rotating disk 19 can be adjusted. When in use, the compression stroke of the suspension spring can be adjusted according to the detection requirements.

[0041] In this embodiment: the A motor 4 is connected to the rotating shaft of the rotating disk 19 through a speed reduction mechanism. In this embodiment, the speed reduction mechanism is a belt transmission mechanism.

[0042] The above general description of the invention involved in this application and the description of its specific implementation methods should not be understood as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art can, without violating the constituent elements of the invention involved, add, reduce or combine the disclosed technical features in the above general description or / and specific implementation methods (including examples) to form other technical solutions within the scope of protection of this application.

Claims

1. Automobile suspension spring durability test equipment, characterized by: It comprises a frame (1), on which a testing device and a clamping device for a replaceable suspension spring are provided; The testing device comprises an upper testing platen (2) and a lower testing platen (3) which can slide in a vertical direction, and a reciprocating mechanism for driving the upper testing platen (2) and the lower testing platen (3); the reciprocating mechanism comprises an A motor (4) and a driving plate (5) which can be driven by the A motor (4) to perform reciprocating motion in a vertical direction, and the upper testing platen (2) and the lower testing platen (3) are respectively located on two sides of the driving plate (5); The clamping device comprises a fixedly arranged notched circular plate (6), the ends of the upper test plate (2) and the lower test plate (3) extending into the notch on the notched circular plate (6); an upper circular plate (7) and a lower circular plate (8) are respectively arranged above and below the notched circular plate (6); a rotatable A positioning shaft (9) and a rotatable B positioning shaft (10) are respectively arranged on the upper and lower sides of the notched circular plate (6); correspondingly, a B motor (11) and a C motor (12) for driving the A positioning shaft (9) and the B positioning shaft (10) to rotate are respectively arranged on the upper circular plate (7) and the lower circular plate (8); an upper spring fixing plate (13) which can be driven to rotate by the B motor (11) is arranged on the lower side of the upper circular plate (7); A plurality of A spring fixing plates (14) slidably matched with the A positioning shaft (9) are provided below the spring fixing plate (13), and a suspension spring can be installed between each A spring fixing plate (14) and the upper spring fixing plate (13); a lower spring fixing plate (15) which can be driven to rotate by the C motor (12) is provided on the upper side of the lower circular plate (8); a plurality of B spring fixing plates (16) slidably matched with the B positioning shaft (10) are provided above the lower spring fixing plate (15), and a suspension spring can be installed between each B spring fixing plate (16) and the lower spring fixing plate (15); and pressure sensors (25) are provided in the A spring fixing plates (14) and the B spring fixing plates (16).

2. The automobile suspension spring durability testing equipment according to claim 1, characterized in that: The rotating shaft of the B motor (11) is connected to the A positioning shaft (9) via a key; and the rotating shaft of the C motor (12) is connected to the B positioning shaft (10) via a key.

3. The automobile suspension spring durability testing equipment according to claim 2, characterized in that: The upper circular plate (7) can be driven by a D motor (17) to adjust its position in the vertical direction, and the lower circular plate (8) can be driven by an E motor (18) to adjust its position in the vertical direction.

4. The automobile suspension spring durability testing equipment according to claim 1, characterized in that: The upper test plate (2) is provided with an upper single plate limit block (22), and the A spring fixed single plate (14) is correspondingly provided with an arc groove for cooperating with the upper single plate limit block (22); the lower test plate (3) is provided with a lower single plate limit block (23), and the B spring fixed single plate (16) is correspondingly provided with an arc groove for cooperating with the lower single plate limit block (23).

5. The automobile suspension spring durability testing equipment according to claim 1, characterized in that: An electromagnet (24) is provided in the notch of the notched circular plate (6), and correspondingly, the end of the lower test pressing plate (3) has ferromagnetism.

6. The automobile suspension spring durability testing device according to any one of claims 1 to 5, characterized in that: The clamping devices have two, which are arranged on both sides of the driving plate (5) in a mirror relationship; the two ends of the upper test platen (2) and the lower test platen (3) respectively extend into the notches on the notched circular plates (6) of the two clamping devices.

7. The automobile suspension spring durability testing equipment according to claim 6, characterized in that: The reciprocating mechanism further comprises a rotating disk (19) and a connecting rod (20), wherein the rotating disk (19) is drivingly connected to the A motor (4), one end of the connecting rod (20) is connected to a connecting block (21) on the rotating disk (19) via a rotary auxiliary structure, and an eccentricity exists between the rotary axis and the rotating axis of the rotating disk (19), and the other end of the connecting rod (20) is hinged to the driving plate (5).

8. The automobile suspension spring durability testing equipment according to claim 7, characterized in that: The position of the connecting block (21) can be adjusted relative to the rotating disk (19), thereby adjusting the eccentricity of the rotating axis in the rotating auxiliary structure relative to the rotating axis of the rotating disk (19).

9. The automobile suspension spring durability testing equipment according to claim 8, characterized in that: The A motor (4) is transmission-connected to the rotating shaft of the rotating disk (19) via a speed reduction mechanism.

10. Automobile suspension spring durability test method, characterized in that: The method is implemented on the automobile suspension spring durability testing device of any one of claims 1 to 9; During the test, the pressure sensor (25) and each motor are electrically connected to the control terminal; the pressure sensor (25) detects a signal when the suspension spring in the test position is compressed, and feeds back to the control terminal. The control terminal will leave a record only when the feedback force of the suspension spring is greater than a certain value, record the number of times, and when the count accumulates to a certain value, it is determined to be qualified. If the feedback force of the suspension spring is less than a certain value, it is determined to be unqualified. In both cases of qualified or unqualified, the corresponding B motor (11) and C motor (12) will be triggered to operate, and a new spring to be tested will be replaced; The replacement process is as follows: when the suspension spring on the A spring fixing plate (14) at the detection position does not meet the standard or meets the standard, the B motor (11) will start when the lower test pressure plate (3) is pushed, thereby rotating the upper spring fixing plate (13) and the A positioning shaft (9), thereby realizing the switching of the suspension spring; when the suspension spring on the B spring fixing plate (16) at the detection position does not meet the standard or meets the standard, the C motor (12) will start when the upper test pressure plate (2) is pushed, thereby rotating the lower spring fixing plate (15) and the B positioning shaft (10), thereby realizing the switching of the suspension spring.

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