Spring fatigue testing machine

Abstract

The utility model relates to the technical field of spring testing machines, in particular to a spring fatigue testing machine, which is characterized in that a test spring is sleeved on a loop bar, one end of the test spring is detachably connected onto a clamping plate, the other end of the test spring is detachably connected onto a corresponding fixing plate, the other end of the loop bar is fixedly arranged on the fixing plate, and the other end of the loop bar is fixedly connected onto the clamping plate. A top seat is arranged on one side of the fixing plate, the input end of the top seat is connected with a pull rod, and the other end of the pull rod is rotationally connected to the pressing plate. After a test spring is placed on the loop bar, the loop bar can be integrally installed on a machine tool, then the lead screw is rotated, the lead screw can drive the pressing plate to move forwards, the pressing plate can compress the test spring, the lead screw drives the pressing plate to be far away from the test spring after resetting, and the lower top seat can move to the position of the fixing plate after continuously moving. And when the top seat continues to move, the fixed plate is pushed to enable the test spring to be stretched, so that the integrated fatigue test of the test spring is realized, and the detection is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of spring testing machines, in particular to a spring fatigue testing machine. Background Technique

[0002] A compression spring is a helical spring that bears axial pressure. Springs are generally divided into equal pitch springs and variable pitch springs. The shapes of compression springs include: cylindrical, conical, convex in the middle and concave in the middle, and a small number of non-circular shapes, etc. There is a certain gap between the coils of the compression spring. When subjected to an external load, the spring shrinks and deforms, storing deformation energy. Variable pitch springs are becoming more and more common, not just equal pitch springs. Variable pitch springs can play different roles in different environments.

[0003] After the production of compression springs, it is an essential procedure to conduct fatigue tests on the compression springs. When conducting fatigue tests, it is necessary to conduct compression or tension tests on the compression springs. However, in actual tests, tension and compression are carried out on two different devices, which is rather troublesome when conducting tension and compression fatigue tests and cannot achieve convenient testing. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spring fatigue testing machine to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A spring fatigue testing machine, including a machine tool, a lead screw and a pressing plate. A side groove is opened on the machine tool. An insertion port is opened at the placement end of the side groove. A clamping plate is inserted into the side groove. A side plate is arranged on the clamping plate. The side plate is slidably connected in the corresponding side groove. A sleeve rod is slidably connected to the clamping plate. A test spring is sleeved on the sleeve rod. One end of the test spring is detachably connected to the clamping plate, and the other end of the test spring is detachably connected to the corresponding fixing plate. The other end of the sleeve rod is fixedly arranged on the fixing plate. A top seat is arranged on one side of the fixing plate. The input end of the top seat is connected to a pull rod, and the other end of the pull rod is rotatably connected to the pressing plate.

[0006] Preferably, the overall shape of the side groove is T-shaped, the side plate and one end of the clamping plate are T-shaped, and the side plate is arranged along the long direction of the clamping plate.

[0007] Preferably, a guide plate is arranged inside the machine tool. The overall shape of the guide plate is L-shaped. An installation plate is fixedly arranged on the guide plate. The installation plate is detachably connected to the machine tool.

[0008] Preferably, a guide groove is opened on the guide plate inside the machine tool. The overall shape of the guide groove is L-shaped, and the bending position of the guide groove is arc-shaped.

[0009] A corresponding sliding rod is slidably connected in the guide groove of the guide plate. One end of the sliding rod is connected to a corresponding top seat, and the diameter of the top seat is larger than that of the sliding rod.

[0010] The sliding rod penetrates the guide plate. A limiting plate is arranged at one end of the guide plate, and the limiting plate is slidably connected in the limiting port of the sliding rod.

[0011] A second ball seat is rotatably connected to the sliding rod on the other side of the guide plate. The second ball seat is arranged at one end of a pull rod, and a first ball seat is arranged at the other end of the pull rod. The first ball seat is rotatably connected to the convex plate of the pressing plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] By arranging a lead screw on the machine tool, the lead screw is connected to the pressing plate. After placing the test spring on the sleeve rod and then placing the whole sleeve rod in the side groove, the side groove can limit the clamping plate, and the clamping plate will not be displaced when being pulled. After the placement is completed, rotate the lead screw, and the lead screw will drive the pressing plate to move towards the fixed plate. The pressing plate can then push the pressing plate, and the pressing plate can compress the test spring on the sleeve rod. Rotate the lead screw in the reverse direction, and the lead screw will drive the pressing plate away from the fixed plate. During the process of the pressing plate moving away, it will drive the top seat to push the fixed plate through the pull rod, and the fixed plate can be driven. After the fixed plate is pushed by the top seat, it will stretch the test spring. By setting that the pressing plate will realize the compression and stretching tests of the test spring under the driving of the lead screw in different directions, it is not necessary to replace the equipment for detection when the test spring is subjected to the fatigue test, so that the fatigue test is more convenient and integrated.

[0014] By arranging a convex plate on the pressing plate, the first ball seat can be installed on the convex plate. The first ball seat can rotate on the convex plate and can be adjusted to multiple positions without being limited. The first ball seat is arranged on the pull rod, and the pull rod can be adjusted to multiple positions under the action of the first ball seat. A second ball seat is arranged at the other end of the pull rod, and the second ball seat is rotatably connected to the sliding rod. The second ball seat can be adjusted to multiple positions on the sliding rod. When the pull rod moves along with the pressing plate, the pull rod will move up and down along the direction of the guide groove. Due to the connection of the pull rod through the first ball seat and the second ball seat, it will not be limited when moving. The pull rod can push and pull the sliding rod during the movement. When pushing, the pressing plate will compress the test spring. When pulling, the pull rod will drive the sliding rod to move down. When the sliding rod moves down, it will drive the top seat to move down, and the top seat will move to the position of the fixed plate. When the top seat continues to move, it can push the fixed plate, thus realizing the stretching of the test spring. Description of the Drawings

[0015] Figure 1 Schematic diagram of the overall structure of the present utility model Figure 1 ;

[0016] Figure 2 Schematic diagram of the overall structure of the present utility model Figure 2 ;

[0017] Figure 3 Schematic diagram of the structure of the first ball seat in the present utility model;

[0018] Figure 4 Schematic diagram of the structure of the limit plate in the present utility model

[0019] In the figure: 1, machine tool; 2, socket; 3, sleeve rod; 4, clamping plate; 5, test spring; 6, fixing plate; 7, lead screw; 8, pressing plate; 9, side plate; 10, side groove; 11, convex plate; 12, first ball seat; 13, pull rod; 14, guide plate; 15, guide groove; 16, mounting plate; 17, second ball seat; 18, sliding rod; 19, top seat; 20, limit plate; 21, limit port. Specific embodiments

[0020] 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 the 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.

[0021] Please refer to Figures 1 to 4 , the present utility model provides a technical solution: a spring fatigue testing machine, including a machine tool 1, a lead screw 7 and a pressing plate 8. A side groove 10 is opened on the machine tool 1, a socket 2 is opened at the placing end of the side groove 10, a clamping plate 4 is inserted into the side groove 10, a side plate 9 is arranged on the clamping plate 4, and the side plate 9 is slidably connected in the corresponding side groove 10. A sleeve rod 3 is slidably connected to the clamping plate 4, a test spring 5 is sleeved on the sleeve rod 3, one end of the test spring 5 is detachably connected to the clamping plate 4, the other end of the test spring 5 is detachably connected to the corresponding fixing plate 6, the other end of the sleeve rod 3 is fixedly arranged on the fixing plate 6, a top seat 19 is arranged on one side of the fixing plate 6, the input end of the top seat 19 is connected to a pull rod 13, and the other end of the pull rod 13 is rotatably connected to the pressing plate 8.

[0022] After placing the test spring 5 on the sleeve rod 3, the sleeve rod 3 can be integrally installed on the machine tool 1. Then, rotate the lead screw 7, and the lead screw 7 can drive the pressing plate 8 to move forward. The pressing plate 8 can compress the test spring. After the lead screw 7 resets, it drives the pressing plate 8 to move away from the test spring. When the top seat 19 continues to move, it will move to the position of the fixing plate 6. When the top seat 19 continues to move, it will push the fixing plate 6 to stretch the test spring 5, so as to realize the integrated fatigue test of the test spring 5, making the detection more convenient.

[0023] The side groove 10 is integrally arranged in a T shape, and one end of the side plate 9 and the clamping plate 4 is arranged in a T shape. The side plate 9 is arranged along the longitudinal direction of the clamping plate 4. By connecting the side groove 10 with the side plate 9, the clamping plate 4 can be limited, and the clamping plate 4 will not be displaced.

[0024] Inside the machine tool 1, a guide plate 14 is arranged. The guide plate 14 is integrally arranged in an L shape. An installation plate 16 is fixedly arranged on the guide plate 14. The installation plate 16 is detachably connected to the machine tool 1. By means of the guide plate 14, the guide groove 15 can be opened, and the sliding rod 18 can be installed in the guide groove 15.

[0025] A guide groove 15 is opened on the guide plate 14 inside the machine tool 1. The guide groove 15 is integrally arranged in an L shape, and the bent position of the guide groove 15 is arranged in an arc shape. By installing the sliding rod 18, the sliding rod 18 can move along the guide groove 15, so as to ensure that the sliding rod 18 drives the top seat 19 to move to the position of the fixing plate 6.

[0026] The corresponding sliding rod 18 is slidably connected in the guide groove 15 of the guide plate 14. One end of the sliding rod 18 is connected to the corresponding top seat 19. The diameter of the top seat 19 is larger than that of the sliding rod 18. By means of the top seat 19, the fixing plate 6 can be pushed.

[0027] The sliding rod 18 penetrates through the guide plate 14. A limiting plate 20 is arranged at one end of the guide plate 14. The limiting plate 20 is slidably connected in the limiting port 21 of the sliding rod 18. By connecting the limiting plate 20 with the limiting port 21, the sliding rod 18 can be limited, and the sliding rod 18 will not tilt and rotate when being pulled by the pull rod 13, so as to ensure that the sliding rod 18 can move in the guide groove 15.

[0028] A second ball seat 17 is rotatably connected to the sliding rod 18 on the other side of the guide plate 14. The second ball seat 17 is arranged at one end of the pull rod 13. A first ball seat 12 is arranged at the other end of the pull rod 13. The first ball seat 12 is rotatably connected to the convex plate 11 of the pressing plate 8. By arranging the first ball seat 12 and the second ball seat 17, the flexible movement of the pull rod 13 can be realized, so that its movement will not be limited.

[0029] 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 testing machine, comprising a machine tool (1), a lead screw (7) and a pressing plate (8), characterized in that: The machine tool (1) is provided with a side groove (10). An insertion port (2) is provided at the placing end of the side groove (10). A clamping plate (4) is inserted into the side groove (10). A side plate (9) is arranged on the clamping plate (4). The side plate (9) is slidably connected in the corresponding side groove (10). A sleeve rod (3) is slidably connected on the clamping plate (4). A test spring (5) is sleeved on the sleeve rod (3). One end of the test spring (5) is detachably connected to the clamping plate (4), and the other end of the test spring (5) is detachably connected to the corresponding fixing plate (6). The other end of the sleeve rod (3) is fixedly arranged on the fixing plate (6). A top seat (19) is arranged on one side of the fixing plate (6). The input end of the top seat (19) is connected to a pull rod (13). The other end of the pull rod (13) is rotatably connected to a pressing plate (8).

2. The spring fatigue testing machine according to claim 1, wherein: The side groove (10) is integrally arranged in a T shape. The side plate (9) and one side end of the clamping plate (4) are arranged in a T shape. The side plate (9) is arranged along the longitudinal direction of the clamping plate (4).

3. A spring fatigue testing machine according to claim 1, characterized in that: A guiding plate (14) is arranged inside the machine tool (1). The guiding plate (14) is integrally arranged in an L shape. A mounting plate (16) is fixedly arranged on the guiding plate (14). The mounting plate (16) is detachably connected to the machine tool (1).

4. A spring fatigue testing machine according to claim 3, characterized in that: A guiding groove (15) is provided on the guiding plate (14) inside the machine tool (1). The guiding groove (15) is integrally arranged in an L shape. The bent position of the guiding groove (15) is arranged in an arc shape.

5. A spring fatigue testing machine according to claim 4, characterized in that: A corresponding sliding rod (18) is slidably connected in the guiding groove (15) of the guiding plate (14). One end of the sliding rod (18) is connected to the corresponding top seat (19). The diameter of the top seat (19) is larger than the diameter of the sliding rod (18).

6. A spring fatigue testing machine according to claim 5, characterized in that: The sliding rod (18) penetrates through the guiding plate (14). A limiting plate (20) is arranged on one side end of the guiding plate (14). The limiting plate (20) is slidably connected in the limiting opening (21) of the sliding rod (18).

7. A spring fatigue testing machine according to claim 6, characterized in that: A second ball seat (17) is rotatably connected to the sliding rod (18) on the other side of the guiding plate (14). The second ball seat (17) is arranged at one end of the pull rod (13). A first ball seat (12) is arranged at the other end of the pull rod (13). The first ball seat (12) is rotatably connected to the convex plate (11) of the pressing plate (8).

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