Coil spring durability test tool

Abstract

The utility model discloses a coil spring durability test tool, which is characterized in that the coil spring durability test tool comprises a cabinet body, the cabinet body is provided with a test platform, a display unit and a button, the test platform is provided with a coil spring test assembly, the coil spring test assembly comprises a center reel and a fixed disc, and the center reel is provided with a coil spring. A first clamping groove for limiting a spring hook on the inner side of a coil spring is formed in the center reel, a servo motor is connected to the lower end of the center reel, a retaining ring coaxial with the center reel is arranged on the fixing disc, a second clamping groove for limiting a spring hook on the outer side of the coil spring is formed in the retaining ring, and a cover plate is arranged on the fixing disc. And the cover plate is positioned on the fixed disc through a bolt. The utility model has the advantages of simple structure, convenient operation, real simulation of the working state of the coil spring in the starter, adjustable torque of the servo motor, and effective measurement of the accurate value of the limit life of the coil spring.

Description

Technical Field

[0001] The utility model relates to the field of testing equipment, in particular to a coil spring durability testing tool. Background Art

[0002] The hand-pulled starting device of a diesel engine comprises a fixed cover with a notch inside and a starting disk arranged in the notch on the fixed cover, wherein the notch has a central axis and a coil spring groove, the starting disk is sleeved on the central axis, the starting disk can rotate around the central axis, a coil spring is arranged in the coil spring groove, one end of the coil spring is fixed on the side wall of the coil spring groove, and the other end is fixed on the starting disk, the starting disk has an annular groove, a starting rope is arranged in the annular groove, the outer end of the starting rope passes through the edge of the fixed cover, a mounting groove is arranged in the gap at the outer end of the starting disk, and a starting claw is hingedly arranged in the mounting groove. During operation, the starting rope is pulled to rotate around the central axis, the coil spring is wound to store force during the rotation, and the starting claw swings around the hinge point to open outward and insert into the hole corresponding to the starting cup on the diesel engine; when the starting rope is loosened, the starting disk rotates around the central axis in the opposite direction at high speed under the elastic force released by the coil spring, so that the starting disk can drive the starting cup to rotate at high speed to start the diesel engine.

[0003] Therefore, the quality and durability of a hand pull starter largely depends on the quality of the coil spring. Therefore, the coil spring needs to be tested when producing the hand pull starter. The coil spring's maximum working times are tested continuously by simulating its working state to determine whether the coil spring meets the service life requirements of the starter. When the existing coil spring fatigue testing machine performs fatigue tests on coil springs, a drive mechanism is usually used to drive a coil spring to perform reciprocating stretching or compression movements in the vertical direction. This structure has many shortcomings, such as the coil spring's working state is not correct, and the test results have no reference value. In addition, the existing testing equipment can only pre-set the number of engineering times to make judgments, so the test results are not accurate. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a coil spring durability testing tool, which simulates the working state of the coil spring for testing, and its results are more accurate.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A coil spring durability test tool, characterized in that it includes a cabinet, the cabinet is provided with a test platform, a display unit, and a button, the test platform is provided with a coil spring test assembly, the coil spring test assembly includes a central reel and a fixed disk, the central reel is provided with a first clamping groove with an inner spring hook of a limiting coil spring, the lower end of the central reel is connected to a servo motor, the fixed disk has a retaining ring coaxially arranged with the central reel, the retaining ring has a second clamping groove with an outer spring hook of a limiting coil spring, the fixed disk is provided with a cover plate, and the cover plate is positioned on the fixed disk by a latch.

[0007] Furthermore, the servo motor is arranged on the bottom surface of the test platform through a motor mounting seat.

[0008] Furthermore, the fixing plate has a flange, the fixing plate is fixedly connected to the test platform through holes on the flange, and the flange has a latch hole corresponding to the latch.

[0009] Furthermore, the display unit is embedded in the cabinet, and the display unit is used to display the number of spring winding tests. The button is set on one side of the display unit and is used for start, stop and emergency stop control.

[0010] The beneficial effects of the utility model include: simple structure, convenient operation, ability to truly simulate the working state of the coil spring in the starter, adjustable torque of the servo motor, and ability to effectively measure the accurate value of the coil spring's ultimate life span. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural schematic diagram of a coil spring test assembly of the utility model. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0014] A kind of Figure 1-2The coil spring durability test tool shown includes a cabinet 1, on which a test platform 2, a coil spring test assembly, a display unit 3, and a button 4 are arranged. The coil spring test assembly is arranged on the test platform. The coil spring test assembly includes a central reel 5 and a fixed disk 6, wherein the fixed disk 6 is arranged on the outside of the central reel 5. A first card slot 51 with a spring hook on the inner side of the limited coil spring is arranged on the central reel 5, and a servo motor 7 is connected to the lower end of the central reel 5. The servo motor 7 is arranged on the bottom surface of the test platform 2 through a motor mounting seat 9. The servo motor 7 can set a torque and a torque detection module is arranged on its drive board to determine whether the coil spring is broken. The fixed disk 6 has a retaining ring 61 coaxially arranged with the central reel 5, which is used to enclose the coil spring on its inner side. The retaining ring 61 has a second card slot 62 with a spring hook on the outer side of the limited coil spring, so that the installation state of the coil spring on the starter can be simulated. In order to prevent the coil spring from axially disengaging from the first clamping groove 51 and the second clamping groove 62 , a cover plate 8 is provided on the fixing plate 6 in this embodiment, and the cover plate 8 is positioned on the fixing plate 6 by means of a latch 10 .

[0015] The fixing plate 6 has a flange 63 , and the fixing plate 6 is fixedly connected to the top surface of the test platform 2 through the holes on the flange 63 . The flange 63 has a latch hole 64 corresponding to the latch 10 .

[0016] The display unit 3 is embedded in the cabinet 1. The display unit 3 is a touch screen. The display unit 3 integrates a controller for editing parameters to control the speed, number of turns, forward and reverse rotation, and torque of the servo motor. The display unit 3 is used to display the number of coil spring winding tests, and when the torque detection module on the servo motor 7 cannot detect the torque during the test, the stop technology can accurately measure how many times the torsion spring is rolled and stretched when it breaks. The button 4 is set on one side of the display unit 3 for start, stop and emergency stop control.

[0017] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A coil spring durability test tool, characterized in that: The invention comprises a cabinet (1), wherein the cabinet (1) is provided with a test platform (2), a display unit (3), and a button (4); the test platform (2) is provided with a coil spring test assembly, wherein the coil spring test assembly comprises a central reel (5) and a fixed disk (6); the central reel (5) is provided with a first clamping groove (51) having an inner spring hook of a limit coil spring; the lower end of the central reel (5) is connected to a servo motor (7); the fixed disk (6) has a retaining ring (61) coaxially arranged with the central reel (5); the retaining ring (61) has a second clamping groove (62) having an outer spring hook of a limit coil spring; the fixed disk (6) is provided with a cover plate (8); the cover plate (8) is positioned on the fixed disk (6) by a latch (10).

2. The coil spring durability testing tool according to claim 1, characterized in that: The servo motor (7) is arranged on the bottom surface of the test platform (2) via a motor mounting seat (9).

3. The coil spring durability testing tool according to claim 1, characterized in that: The fixing plate (6) has a flange (63), and the fixing plate (6) is fixedly connected to the test platform (2) via a hole on the flange (63). The flange (63) has a latch hole (64) corresponding to the latch (10).

4. The coil spring durability testing tool according to claim 1, characterized in that: The display unit (3) is embedded in the cabinet (1), and is used to display the number of spring winding tests. The button (4) is arranged on one side of the display unit (3) and is used for start, stop and emergency stop control.

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