Spring fatigue detection device for spring production

Abstract

The utility model provides a spring fatigue detection device for spring production, which comprises a supporting back plate, a reciprocating extrusion assembly is arranged on the upper end face of a positioning base plate, a pressing assembly is arranged on the upper side of the front end face of the supporting back plate, and a lifting seat can drive the pressing assembly to move downwards by controlling a second low-speed motor to rotate forwards. On the contrary, the lifting seat drives the lower pressing plate to move upwards, in the process, when the lower pressing plate moves downwards, the compression force of the to-be-detected spring is gradually increased, and when the lower pressing plate moves upwards, the compression force of the to-be-detected spring is gradually weakened, so that the detection personnel can adjust the compressed state of the to-be-detected spring according to the requirements; by starting the first low-speed motor, the first low-speed motor can drive the extrusion cam to rotate, and the rotating extrusion cam performs up-and-down reciprocating extrusion on the to-be-detected spring through the wear-resistant block and the extrusion bottom plate so as to perform fatigue detection.

Description

Technical Field

[0001] The utility model relates to the technical field of spring fatigue detection, in particular to a spring fatigue detection device for spring production. Background Technique

[0002] A spring is a common mechanical component widely used in various industrial fields. The fatigue performance of a spring is an important indicator for evaluating its working life and reliability. Spring fatigue detection is to conduct a fatigue test on the spring to evaluate whether it will undergo fatigue failure during long-term use. Therefore, during the spring production process, corresponding detection devices are needed to conduct sampling fatigue detection on the produced springs.

[0003] In the use process of the existing spring fatigue detection devices, most of them use an electric hydraulic push rod to reciprocally squeeze and detect the spring. However, in the actual use process of such a squeezing detection structure, the detection personnel need to frequently control the electric hydraulic push rod to perform telescopic actions, which not only consumes the physical strength of the detection personnel, but also it is difficult to ensure that the telescopic range is the same each time. Secondly, the existing spring fatigue detection devices cannot control the size of the compressed state of the spring according to requirements, and there is room for improvement in terms of practicality. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spring fatigue detection device for spring production to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A spring fatigue detection device for spring production includes a spring to be tested, a positioning base plate, and a supporting back plate. The supporting back plate is fixedly connected to the rear side of the upper end surface of the positioning base plate. The spring to be tested is placed above the positioning base plate. A reciprocating extrusion assembly is arranged on the upper end surface of the positioning base plate, and the reciprocating extrusion assembly is used for conducting extrusion fatigue detection on the spring to be tested. A downward pressing assembly is arranged on the upper side of the front end surface of the supporting back plate, and the downward pressing assembly is used for downward pressing and blocking the spring to be tested.

[0007] Preferably, the reciprocating extrusion assembly includes an extrusion bottom plate, a limiting groove, a wear-resistant block, a first low-speed motor, and an extrusion cam. The first low-speed motor is installed on the upper end surface of the positioning base plate. The extrusion cam is installed at the transmission end of the first low-speed motor. The limiting groove is opened on the lower side of the front end surface of the supporting back plate. The extrusion bottom plate is fitted inside the limiting groove. The wear-resistant block is arranged on the front side of the lower end surface of the extrusion bottom plate.

[0008] Preferably, the pressing-down component includes a guiding groove, a lifting seat, an external threaded rod, a second low-speed motor, an indicating central vertical rod, and a lower pressing plate. The second low-speed motor is installed on the upper end surface of the supporting back plate. The driving end of the second low-speed motor is installed with an external threaded rod. The upper side of the front end surface of the supporting back plate is provided with a guiding groove. The lifting seat is installed on the circumferential side of the external threaded rod. The lower pressing plate is arranged on the front end surface of the lifting seat. The indicating central vertical rod is inserted into the lower pressing plate.

[0009] Preferably, height scale lines are arranged on the circumferential side of the indicating central vertical rod. The upper limiting ring is arranged on the front side of the lower end surface of the lower pressing plate, and the upper limiting ring matches the top of the spring to be measured.

[0010] Preferably, the limiting groove matches the extrusion bottom plate. The limiting rod is arranged on the rear side of the upper end surface of the positioning base plate. The limiting through hole is arranged in the rear side of the extrusion bottom plate, and the limiting through hole matches the limiting rod.

[0011] Preferably, the installation threaded hole is arranged on the front side of the upper end surface of the extrusion bottom plate. The lower limiting ring is fixedly connected to the upper end surface of the extrusion bottom plate, and the lower limiting ring matches the bottom of the spring to be measured.

[0012] Preferably, the guiding groove matches the lifting seat, and the indicating central vertical rod is of a detachable structure.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. During the process of sampling fatigue detection of the springs to be measured after production, by starting the first low-speed motor, the first low-speed motor can drive the extrusion cam to rotate. The rotating extrusion cam will reciprocally extrude the springs to be measured up and down through the wear-resistant block and the extrusion bottom plate for fatigue detection. The detection is convenient. And during this process, the limiting groove will limit and guide the extrusion bottom plate, and the matching limiting through hole and the limiting rod can further limit and guide the extrusion bottom plate, so as to ensure the lifting use stability of the extrusion bottom plate.

[0015] 2. By controlling the forward rotation of the second low-speed motor, the lifting seat can drive the lower pressing plate to move downward, and vice versa, the lifting seat can drive the lower pressing plate to move upward. During this process, when the lower pressing plate moves downward, the compression force on the spring to be measured will gradually increase. When the lower pressing plate moves upward, the compression force on the spring to be measured will gradually decrease, so as to facilitate the tester to adjust the size of the compressed state of the spring to be measured according to the requirements. And the indicating central vertical rod with height scale lines arranged on the circumferential side also facilitates the tester to observe the height where the lower pressing plate is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0017] Figure 2 This is the structural diagram of the reciprocating extrusion assembly and the downward pressing assembly in the present utility model;

[0018] Figure 3 This is the right - view sectional view of the reciprocating extrusion assembly and the downward pressing assembly in the present utility model;

[0019] Figure 4 This is the structural diagram of the positioning base plate and the supporting back plate in the present utility model;

[0020] Figure 5 This is the structural diagram of the extrusion bottom plate in the present utility model.

[0021] In the figure: 1, spring to be tested; 2, positioning base plate; 3, reciprocating extrusion assembly; 31, lower limit ring; 32, extrusion bottom plate; 321, limit through - hole; 33, limit groove; 34, limit rod; 35, wear - resistant block; 36, first low - speed motor; 37, extrusion cam; 4, supporting back plate; 5, downward pressing assembly; 51, guide groove; 52, lifting seat; 53, external threaded rod; 54, second low - speed motor; 55, indicating center vertical rod; 551, height scale line; 56, lower pressing plate; 561, upper limit ring; 57, installation threaded hole. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-5 , the present utility model provides a technical solution:

[0024] Embodiment 1:

[0025] A spring fatigue detection device for spring production, including a spring 1 to be tested, a positioning base plate 2, and a supporting back plate 4. The rear side of the upper end surface of the positioning base plate 2 is fixedly connected with the supporting back plate 4. The supporting back plate 4 and the positioning base plate 2 are connected by welding. The supporting back plate 4 can support the downward pressing assembly 5. A spring 1 to be tested is placed above the positioning base plate 2. Installation through - holes are symmetrically opened on the left and right sides inside the positioning base plate 2, which facilitate the tester to install and fix the positioning base plate 2 at a specified position on an external workbench.

[0026] A reciprocating extrusion assembly 3 is provided on the upper end surface of the positioning substrate 2, and the reciprocating extrusion assembly 3 is used for detecting the extrusion fatigue degree of the spring 1 to be tested. A downward pressing assembly 5 is provided on the upper side of the front end surface of the supporting back plate 4, and the downward pressing assembly 5 is used for downwardly blocking the spring 1 to be tested, so that the tester can detect the fatigue degree of the spring 1 to be tested in different compression states according to requirements. A control panel is installed on the right side of the upper end surface of the positioning substrate 2, and the control panel is connected to the first low-speed motor 36 and the second low-speed motor 54 through wires respectively. The control panel facilitates the tester to control the operation of the first low-speed motor 36 and the second low-speed motor 54 according to requirements. Since the detailed structure and working principle of the control panel are relatively mature technologies in the prior art, no further elaboration will be made here.

[0027] The reciprocating extrusion assembly 3 includes an extrusion bottom plate 32, a limiting groove 33, a wear-resistant block 35, a first low-speed motor 36 and an extrusion cam 37. The first low-speed motor 36 is installed on the upper end surface of the positioning substrate 2, and the driving end of the first low-speed motor 36 is installed with an extrusion cam 37. When the first low-speed motor 36 is working, it can drive the extrusion cam 37 to rotate slowly, so that the extrusion cam 37 rotating slowly can reciprocally extrude and push the wear-resistant block 35 up and down. A limiting groove 33 is opened on the lower side of the front end surface of the supporting back plate 4, and the limiting groove 33 is matched with the extrusion bottom plate 32. The limiting groove 33 can limit and guide the extrusion bottom plate 32 to prevent the extrusion bottom plate 32 from shifting or shaking during the lifting process. The extrusion bottom plate 32 is fitted inside the limiting groove 33, and the extrusion bottom plate 32 can support the spring 1 to be tested.

[0028] A wear-resistant block 35 is provided on the front side of the lower end surface of the extrusion bottom plate 32. The wear-resistant block 35 is connected to the extrusion bottom plate 32 by welding. The material of the wear-resistant block 35 is wear-resistant steel, and the wear-resistant block 35 made of wear-resistant steel has good wear resistance, thereby improving the service life of the extrusion bottom plate 32. A limiting rod 34 is provided on the rear side of the upper end surface of the positioning substrate 2. The limiting rod 34 is connected to the positioning substrate 2 by welding. A limiting through hole 321 is opened at the rear side inside the extrusion bottom plate 32, and the limiting through hole 321 is matched with the limiting rod 34. The matching limiting through hole 321 and the limiting rod 34 can further limit and guide the extrusion bottom plate 32, thereby ensuring the lifting stability of the extrusion bottom plate 32. A lower limiting ring 31 is fixedly connected to the upper end surface of the extrusion bottom plate 32, and the lower limiting ring 31 is matched with the bottom of the spring 1 to be tested. The lower limiting ring 31 is connected to the extrusion bottom plate 32 by welding. The lower limiting ring 31 can limit the bottom of the spring 1 to be tested to prevent the bottom of the spring 1 to be tested from shifting during the fatigue degree detection process.

[0029] Embodiment 2:

[0030] Based on the first embodiment, in this embodiment, by controlling the forward rotation of the second low-speed motor 54, the lifting seat 52 can drive the lower pressing plate 56 to move downward. Conversely, the lifting seat 52 will drive the lower pressing plate 56 to move upward. During this process, when the lower pressing plate 56 moves downward, the compression force on the spring 1 to be tested will gradually increase. When the lower pressing plate 56 moves upward, the compression force on the spring 1 to be tested will gradually decrease, so that the tester can adjust the magnitude of the compressed state of the spring 1 to be tested according to the requirements.

[0031] The lower pressing assembly 5 includes a guide groove 51, a lifting seat 52, an external threaded rod 53, a second low-speed motor 54, an indicating central vertical rod 55 and a lower pressing plate 56. The second low-speed motor 54 is installed on the upper end face of the support back plate 4. The second low-speed motor 54 can drive the external threaded rod 53 to rotate forward and backward during operation. The transmission end of the second low-speed motor 54 is installed with the external threaded rod 53. An internal threaded through hole is formed inside the lifting seat 52, and the internal threaded through hole meshes with the external threaded rod 53. The internal threaded through hole enables the external threaded rod 53 to drive the lifting seat 52 to move up and down during forward and reverse rotation. A guide groove 51 is formed on the upper side of the front end face of the support back plate 4. The guide groove 51 matches the lifting seat 52. The guide groove 51 can limit and guide the lifting seat 52 to prevent the lifting seat 52 from shifting or shaking during lifting and use. The lifting seat 52 is installed on the circumferential side of the external threaded rod 53. The lifting seat 52 can support the lower pressing plate 56.

[0032] The lower pressing plate 56 is arranged on the front end face of the lifting seat 52. The lower pressing plate 56 is connected to the lifting seat 52 and the upper limit ring 561 by welding. The lower pressing plate 56 can block and limit the top of the spring 1 to be tested. An indicating central vertical rod 55 is inserted into the lower pressing plate 56. A height scale line 551 is arranged on the circumferential side of the indicating central vertical rod 55. The indicating central vertical rod 55 with the height scale line 551 arranged on the circumferential side facilitates the tester to observe the height of the lower pressing plate 56. The indicating central vertical rod 55 is a detachable structure. The detachable indicating central vertical rod 55 facilitates the tester to disassemble and assemble the spring 1 to be tested. An upper limit ring 561 is arranged on the front side of the lower end face of the lower pressing plate 56, and the upper limit ring 561 matches the top of the spring 1 to be tested. The upper limit ring 561 can limit the top of the spring 1 to be tested to prevent the top of the spring 1 from shifting during the fatigue test. An installation threaded hole 57 is formed on the front side of the upper end face of the extrusion bottom plate 32. External threads are arranged on the lower circumferential side of the indicating central vertical rod 55, and the external threads mesh with the installation threaded hole 57. The meshing external threads and the installation threaded hole 57 facilitate the installation and fixation of the indicating central vertical rod 55 on the upper end face of the extrusion bottom plate 32.

[0033] Working principle: During the production process of the spring 1 to be tested, it is necessary to conduct sampling fatigue detection on the produced spring 1 to be tested. First, the tester controls the reverse rotation of the second low-speed motor 54 through the control panel, causing the second low-speed motor 54 to drive the external threaded rod 53 to rotate in reverse. The reverse rotating external threaded rod 53 will drive the lifting seat 52 to move upward through the internal thread through-hole, and then the lifting seat 52 will drive the lower pressing plate 56 to move upward in place. Then, the spring 1 to be tested can be placed in the lower limiting ring 31. After placement, control the second low-speed motor 54 to rotate forward, and the lifting seat 52 can drive the lower pressing plate 56 to move downward. After the lower pressing plate 56 moves down a certain distance, vertically insert the indicating center vertical rod 55 into the lower pressing plate 56, and install and fix the bottom of the indicating center vertical rod 55 on the upper end surface of the extrusion bottom plate 32 through the external thread and the installation threaded hole 57, so that the tester can adjust the height of the lower pressing plate 56 to the required height with the help of the indicating center vertical rod 55 provided with height scale lines 551 on the annular side (refer to Figure 1 or Figure 3 ). During this process, when the lower pressing plate 56 moves downward, the compression force on the spring 1 to be tested will gradually increase, and vice versa, the compression force on the spring 1 to be tested will gradually decrease, so that the tester can adjust the size of the compressed state of the spring 1 to be tested according to the requirements; when the use height of the lower pressing plate 56 is adjusted to the required height, the second low-speed motor 54 can be stopped from continuing to work, and then the first low-speed motor 36 can be started to drive the extrusion cam 37 to rotate. The rotating extrusion cam 37 will reciprocally extrude and push the extrusion bottom plate 32 up and down through the wear-resistant block 35, and then the extrusion bottom plate 32 will conduct reciprocating extrusion fatigue detection on the spring 1 to be tested. During this process, the limiting groove 33 will limit and guide the extrusion bottom plate 32, and the matching limiting through-hole 321 and the limiting rod 34 can further limit and guide the extrusion bottom plate 32 to ensure the lifting and use stability of the extrusion bottom plate 32; when the spring 1 to be tested is fatigue detected to the required time, the tester first stops the first low-speed motor 36 from working, then controls the first low-speed motor 36 to drive the extrusion cam 37 to rotate slightly to the initial position. At this time, disassemble the indicating center vertical rod 55, and then control the second low-speed motor 54 to rotate in reverse, so that the external threaded rod 53 drives the lower pressing plate 56 to move upward to the initial position through the lifting seat 52. At this time, the spring 1 to be tested after detection can be taken away.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spring fatigue detection device for spring production, comprising a spring to be tested (1), a positioning base plate (2) and a supporting back plate (4), characterized in that: A support back plate (4) is fixedly connected to the rear side of the upper end surface of the positioning substrate (2). A spring to be tested (1) is placed above the positioning substrate (2). A reciprocating extrusion assembly (3) is arranged on the upper end surface of the positioning substrate (2), and the reciprocating extrusion assembly (3) is used for detecting the extrusion fatigue degree of the spring to be tested (1). An upper pressing assembly (5) is arranged on the upper side of the front end surface of the support back plate (4), and the upper pressing assembly (5) is used for pressing and blocking the spring to be tested (1).

2. The spring fatigue detection device for spring production according to claim 1, characterized in that: The reciprocating extrusion assembly (3) includes an extrusion bottom plate (32), a limiting groove (33), a wear-resistant block (35), a first low-speed motor (36) and an extrusion cam (37). The first low-speed motor (36) is installed on the upper end surface of the positioning substrate (2). The extrusion cam (37) is installed at the driving end of the first low-speed motor (36). The limiting groove (33) is formed in the lower side of the front end surface of the support back plate (4). The extrusion bottom plate (32) is fitted inside the limiting groove (33). The wear-resistant block (35) is arranged on the front side of the lower end surface of the extrusion bottom plate (32).

3. A spring fatigue detection device for spring production according to claim 1, characterized in that: The upper pressing assembly (5) includes a guiding groove (51), a lifting seat (52), an external threaded rod (53), a second low-speed motor (54), an indicating central vertical rod (55) and a lower pressing plate (56). The second low-speed motor (54) is installed on the upper end surface of the support back plate (4). The external threaded rod (53) is installed at the driving end of the second low-speed motor (54). The guiding groove (51) is formed in the upper side of the front end surface of the support back plate (4). The lifting seat (52) is installed on the circumferential side of the external threaded rod (53). The lower pressing plate (56) is arranged on the front end surface of the lifting seat (52). The indicating central vertical rod (55) is inserted inside the lower pressing plate (56).

4. A spring fatigue detection device for spring production according to claim 3, characterized in that: Height scale lines (551) are arranged on the circumferential side of the indicating central vertical rod (55). An upper limiting ring (561) is arranged on the front side of the lower end surface of the lower pressing plate (56), and the upper limiting ring (561) is matched with the top of the spring to be tested (1).

5. The spring fatigue detection device for spring production according to claim 2, characterized in that: The limiting groove (33) is matched with the extrusion bottom plate (32). A limiting rod (34) is arranged on the rear side of the upper end surface of the positioning substrate (2). A limiting through hole (321) is formed in the rear side of the extrusion bottom plate (32), and the limiting through hole (321) is matched with the limiting rod (34).

6. The spring fatigue detection device for spring production according to claim 2, wherein: An installation threaded hole (57) is formed in the front side of the upper end surface of the extrusion bottom plate (32). A lower limiting ring (31) is fixedly connected to the upper end surface of the extrusion bottom plate (32), and the lower limiting ring (31) is matched with the bottom of the spring to be tested (1).

7. A spring fatigue detection device for spring production according to claim 3, characterized in that: The guiding groove (51) is matched with the lifting seat (52). The indicating central vertical rod (55) is of a detachable structure.

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