Device for testing service life of spring

Abstract

The utility model relates to a device for testing the service life of a spring, and the device comprises a test bench which is provided with at least one test position; the at least one testing mechanism is mounted at the testing position; the testing mechanism comprises a testing assembly and a flexible testing seat, the testing assembly comprises a testing guide rod, a knuckle bearing arranged at one end of the testing guide rod, a stop piece arranged at the other end of the testing guide rod and a testing spring arranged between the knuckle bearing and the stop piece, and the testing guide rod is sleeved with the testing spring; the test guide rod sleeved with the test spring passes through the flexible test seat; the driving assembly comprises a power unit and a swing assembly connected with the output end of the power unit, and the swing assembly is connected with the knuckle bearing. According to the utility model, the service life test of three to six springs can be completed in an extremely short time.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a device for testing the life of a spring. Background Art

[0002] Springs or elastic elements are very important basic parts. Due to their many valuable special properties, they are widely used in automobiles, tractors, instruments and textile machinery. If some important springs suffer fatigue fracture accidents during work, it may cause significant economic losses.

[0003] In order to ensure the safe and reliable operation of components or complete machines, some very important springs are required to have a very long service life or a very low failure rate.

[0004] It is not easy to predict or estimate the fatigue life of a spring. At present, the design of springs or elastic elements usually uses material properties to calculate theoretical life, which makes it difficult to derive the actual life cycle of the spring based on actual working conditions. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the utility model discloses a device for testing the life of a spring.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A device for testing spring life, comprising:

[0008] A test bench, provided with at least one test station;

[0009] At least one test mechanism is installed at the test position; the test mechanism includes a test assembly and a flexible test seat, the test assembly includes a test guide rod, a joint bearing arranged at one end of the test guide rod, a stopper arranged at the other end of the test guide rod, and a test spring arranged between the joint bearing and the stopper, and the test spring is sleeved on the test guide rod; the test guide rod sleeved with the test spring passes through the flexible test seat;

[0010] The driving assembly comprises a power unit and a swing assembly connected to the output end of the power unit, wherein the swing assembly is connected to the spherical bearing.

[0011] In one embodiment of the utility model, the flexible test seat includes a bearing seat fixed to the test position and a swing end provided on the bearing seat, and a test guide rod with the test spring sleeved thereon passes through the swing end.

[0012] In an embodiment of the present invention, one end of the test spring abuts against the spherical bearing, and the other end of the test spring abuts against the stopper.

[0013] In one embodiment of the present invention, the stop member is a retaining ring.

[0014] In one embodiment of the present invention, the power unit includes a mounting bracket fixed to the test bench, a servo motor mounted on the mounting bracket, and a shaft core connecting rod connected to an output end of the servo motor.

[0015] In one embodiment of the utility model, the swing assembly includes a test swing arm connected to the shaft core connecting rod and a swing shaft fixed on the test swing arm; the swing shaft passes through the joint bearing.

[0016] In one embodiment of the present invention, the shaft core connecting rod passes through the test swing arm, and the shaft core connecting rod and the test swing arm are connected by a key.

[0017] In one embodiment of the present invention, the test bench has three test positions, and the angles formed between two adjacent test positions are the same.

[0018] In one embodiment of the present invention, there are three test mechanisms, and the heights of the test seats of the three test mechanisms are different.

[0019] In one embodiment of the utility model, the test bench is provided with at least one waist-shaped groove, and the waist-shaped groove forms a test position; and mounting holes are provided on both sides of the waist-shaped groove.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The device for testing the life of a spring described in the utility model can obtain a periodic value of the real-time parameter attenuation of the spring or elastic element in the form of monitoring the real-time torque of the power unit by adopting a torque mode through a driving component, and obtain a real life situation of the spring or elastic element under a specific working condition, thereby obtaining the accurate life of the spring or elastic element. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of the first viewing angle of the device for testing the spring life in the utility model.

[0024] Figure 2 It is a structural schematic diagram of the second viewing angle of the device for testing the spring life in the utility model.

[0025] Figure 3It is a top view of the device for testing the spring life in the utility model.

[0026] Figure 4 It is a structural schematic diagram of the test component in the utility model.

[0027] Figure 5 It is an exploded view of the test assembly in the utility model.

[0028] Figure 6 It is a structural schematic diagram of the flexible test seat in the utility model.

[0029] Figure 7 It is a structural schematic diagram of the test bench in the utility model.

[0030] Figure 8 It is a structural schematic diagram of the driving component in the utility model.

[0031] Explanation of the reference numerals in the specification: 100, test mechanism; 101, spherical bearing; 102, test guide rod; 103, test spring; 104, stopper; 105, bearing seat; 106, swing end; 200, test bench; 201, test position; 300, drive assembly; 301, servo motor; 302, coupling; 303, mounting bracket; 304, shaft core connecting rod; 305, test swing arm; 306, swing shaft. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0033] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions of the reference drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0034] Combination Figure 1 and Figure 2 , a device for testing spring life, comprising:

[0035] A test bench 200 is provided with at least one test position 201;

[0036] At least one test mechanism 100 is installed at the test position 201; the test mechanism 100 includes a test assembly and a flexible test seat, the test assembly includes a test guide rod 102, a joint bearing 101 arranged at one end of the test guide rod 102, a stopper 104 arranged at the other end of the test guide rod 102, and a test spring 103 arranged between the joint bearing 101 and the stopper 104, and the test spring 103 is sleeved on the test guide rod 102; the test guide rod 102 sleeved with the test spring 103 passes through the flexible test seat;

[0037] The driving assembly 300 includes a power unit and a swing assembly connected to the output end of the power unit, and the swing assembly is connected to the spherical bearing 101 .

[0038] This embodiment provides a device for testing the life of a spring. The drive component 300 can adopt a torque mode to monitor the real-time torque of the power unit to obtain a periodic value of the real-time parameter attenuation of the test object, i.e., the test spring 103, and obtain a real life of the test spring 103 under specific working conditions.

[0039] In this embodiment, combined with Figure 1 and Figure 7 The test bench 200 is a disc, and is provided with three test positions 201, namely, a first test position, a second test position and a third test position. Each test position 201 is correspondingly installed with a test mechanism 100, and there are three test mechanisms 100, which are respectively defined as a first test mechanism, a second test mechanism and a third test mechanism.

[0040] Specifically, the test bench 200 has three waist-shaped grooves, which form the test position 201; mounting holes are provided on both sides of the waist-shaped grooves. It can be understood that the test mechanism 100 can be fixed at any position of the waist-shaped groove according to needs, such as a position close to the center of the test bench 200 or a position far from the center of the test bench 200, so as to meet the test needs.

[0041] Furthermore, if Figure 3 As shown, the first test position, the second test position and the third test position are distributed on the test bench 200 in a 120° array.

[0042] Furthermore, since the spherical bearing 101 of the first test mechanism, the spherical bearing 101 of the second test mechanism, and the spherical bearing 101 of the third test mechanism are subsequently connected to the same swing shaft 306, the test seat height of the first test mechanism, the test seat height of the second test mechanism, and the test seat height of the third test mechanism are all different. Figure 1 As shown, the test seat height of the first test mechanism>the test seat height of the second test mechanism>the test seat height of the third test mechanism.

[0043] In this embodiment, combined with Figure 4 and Figure 5 The test guide rod 102 is a hollow rod, and a plurality of threads can be provided on the inner wall of one end thereof, so that one end of the test guide rod 102 is threadedly connected to the spherical bearing 101 .

[0044] One end of the test spring 103 abuts against the spherical bearing 101, and the other end of the test spring 103 abuts against the stopper 104. Specifically, the stopper 104 can be a retaining ring, which is fixed to one end of the test guide rod 102 by bolts, that is, the bolts pass through the retaining ring and the other end of the test guide rod 102 in sequence and are tightened, thereby realizing a fixed connection between the retaining ring and the test guide rod 102. When it is necessary to remove the test spring 103 from the test guide rod 102, it is only necessary to loosen the bolts, remove the retaining ring, and then remove the test spring 103 from the test guide rod 102.

[0045] In this embodiment, combined with Figure 4 and Figure 6 The flexible test seat includes a bearing seat 105 fixed to the test position 201 and a swing end 106 arranged on the bearing seat 105 , and a test guide rod 102 with a test spring 103 passes through the swing end 106 .

[0046] In this embodiment, if Figure 8 As shown, the power unit includes a mounting bracket 303 fixed to the test bench 200, a servo motor 301 mounted on the mounting bracket 303, and a shaft core connecting rod 304 connected to the output end of the servo motor 301 through a coupling 302. It should be noted that the test speed depends on the rotation speed of the servo motor 301. One rotation of the servo motor 301 is one test, and the test of multiple test springs 103 can be completed in a very short time.

[0047] The swing assembly includes a test swing arm 305 connected to the shaft core connecting rod 304 and a swing shaft 306 fixed to the test swing arm 305; the swing shaft 306 passes through the joint bearing 101. Specifically, the shaft core connecting rod 304 passes through the test swing arm 305, and the shaft core connecting rod 304 and the test swing arm 305 can be connected by a key.

[0048] The test steps of the utility model are as follows:

[0049] S1, unscrew the test guide rod 102 from the spherical bearing 101, and remove the stopper 104 at the end of the test guide rod 102;

[0050] S2, insert the test spring 103 into the test guide rod 102 and then reinstall it on the spherical bearing 101, and reinstall the stopper 104 to the other end of the test guide rod 102 by bolts;

[0051] S3. Install the other two sets of springs in the same manner as above.

[0052] S4, start the servo motor 301, the output end of the servo motor 301 drives the test swing arm 305 to rotate, and the swing shaft 306 on the test swing arm 305 drives the test assembly to rotate around the shaft core connecting rod 304;

[0053] The servo motor 301 adopts a torque mode, records the torque force value of each circle to generate a force value curve, and analyzes the force value curve to obtain the force value attenuation cycle of the test spring 103.

[0054] It should be noted that this embodiment is described with respect to the case of three testing mechanisms 100 , and four or more testing mechanisms 100 can also be tested according to the above-mentioned testing steps.

[0055] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A device for testing spring life, characterized in that: include: A test bench (200) is provided with at least one test position (201); At least one test mechanism (100) is installed at the test position (201); the test mechanism (100) comprises a test assembly and a flexible test seat, the test assembly comprises a test guide rod (102), a joint bearing (101) arranged at one end of the test guide rod (102), a stopper (104) arranged at the other end of the test guide rod (102), and a test spring (103) arranged between the joint bearing (101) and the stopper (104), and the test spring (103) is sleeved on the test guide rod (102); the test guide rod (102) sleeved with the test spring (103) passes through the flexible test seat; The driving assembly (300) comprises a power unit and a swing assembly connected to the output end of the power unit, wherein the swing assembly is connected to the joint bearing (101).

2. The device for testing spring life according to claim 1, characterized in that: The flexible test seat comprises a bearing seat (105) fixed to the test position (201) and a swing end (106) arranged on the bearing seat (105), and a test guide rod (102) sleeved with the test spring (103) passes through the swing end (106).

3. The device for testing spring life according to claim 1, characterized in that: One end of the test spring (103) abuts against the spherical bearing (101), and the other end of the test spring (103) abuts against the stopper (104).

4. The device for testing spring life according to claim 1 or 3, characterized in that: The stopper (104) is a retaining ring.

5. The device for testing spring life according to claim 1, characterized in that: The power unit comprises a mounting bracket (303) fixed to the test bench (200), a servo motor (301) mounted on the mounting bracket (303), and a shaft core connecting rod (304) connected to an output end of the servo motor (301).

6. The device for testing spring life according to claim 5, characterized in that: The swing assembly comprises a test swing arm (305) connected to the shaft core connecting rod (304) and a swing shaft (306) fixed on the test swing arm (305); the swing shaft (306) passes through the joint bearing (101).

7. The device for testing spring life according to claim 6, characterized in that: The shaft core connecting rod (304) passes through the test swing arm (305), and the shaft core connecting rod (304) and the test swing arm (305) are connected by a key.

8. The device for testing spring life according to claim 1, characterized in that: The test bench (200) has three test positions (201), and the angles formed between two adjacent test positions (201) are the same.

9. The device for testing spring life according to claim 8, characterized in that: There are three test mechanisms (100), and the heights of the test seats of the three test mechanisms (100) are all different.

10. The device for testing spring life according to claim 1, characterized in that: The test bench (200) is provided with at least one waist-shaped groove, and the waist-shaped groove forms a test position (201); and mounting holes are provided on both sides of the waist-shaped groove.

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