Spring tensile testing machine

Abstract

The utility model discloses a spring tensile testing machine which comprises the following components: a base which is fixedly provided with a protective cover at the top and is movably provided with a cover door at one side; the hydraulic cylinder is fixedly mounted at the top of the protective cover, and the telescopic end of the hydraulic cylinder extends into the protective cover; the lower mounting plate is fixedly mounted at the top of the base and located in the protective cover; the upper mounting plate is fixedly mounted at the telescopic end of the hydraulic cylinder; wherein the top of the lower mounting plate and the bottom of the upper mounting plate are respectively provided with a clamping part for clamping hanging rings at the two ends of the spring, the upper clamping part and the lower clamping part are symmetrically arranged, and the hanging rings at the two ends of the spring can be firmly clamped in the whole tensile test process of the spring, so that the tensile stability of the spring is improved; and the spring is prevented from falling off in the stretching process.

Description

Technical Field

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

[0002] A spring is a mechanical part that utilizes elasticity. A part made of elastic material deforms under the action of an external force and returns to its original state after the external force is removed. It is also called a "spring", generally made of spring steel. Springs are of complex and diverse types. Classified by shape, there are mainly helical springs, scroll springs, leaf springs, special-shaped springs, etc. During the production of springs, it is necessary to conduct tensile tests on them.

[0003] The patent with the Chinese patent publication number CN218994941U, whose publication date is May 9, 2023, discloses a spring tensile testing device, including a support assembly. The support assembly includes a longitudinal plate. A cylinder is fixedly connected to the top end of the longitudinal plate. The telescopic end of the cylinder is fixedly connected with a movable tensile member. At the bottom inside the longitudinal plate, there is a base fixedly connected. A protective tube assembly is arranged between the movable tensile member and the base. The movable tensile member includes a top plate. A base is fixedly connected to the lower end surface of the top plate. A sleeve and a first hook are fixedly connected to the lower end surface of the base. A clamping platform is fixedly connected to the upper end surface of the base. A second hook is fixedly connected to the upper end surface of the clamping platform. The protective tube assembly includes a top tube, and the bottom of the top tube is movably inserted with a bottom tube.

[0004] The above patent can solve the corresponding technical problems and avoid the broken springs flying everywhere during the stretching process. However, during the use of the above patent, only the upper and lower two hooks are used to hang the hanging ring of the spring. When the spring is continuously stretched under force, the hanging ring is prone to deformation and detachment from the hook, affecting the normal tensile test of the spring. Content of the Utility Model

[0005] The purpose of the utility model is to provide a spring tensile testing machine to solve the problem that in the prior art, only the upper and lower two hooks are used to hang the hanging ring of the spring during the stretching process. When the spring is continuously stretched under force, the hanging ring is prone to deformation and detachment from the hook, affecting the normal tensile test of the spring.

[0006] To achieve the above object, the main technical solutions adopted by the present utility model include: a spring tensile testing machine, comprising: a base, on the top of which a protective cover is fixedly installed, and a cover door is movably installed on one side of the protective cover; a hydraulic cylinder, which is fixedly installed on the top of the protective cover, and the telescopic end of the hydraulic cylinder extends into the interior of the protective cover; a lower mounting plate, which is fixedly installed on the top of the base and is located inside the protective cover; an upper mounting plate, which is fixedly installed on the telescopic end of the hydraulic cylinder; wherein, clamping members for clamping the hanging rings at both ends of the spring are respectively installed on the top of the lower mounting plate and the bottom of the upper mounting plate, and the upper and lower two clamping members are symmetrically arranged.

[0007] As a preferred technical solution, the clamping member includes a fixed clamping plate, a movable clamping plate and a compression bolt. The hanging rings at both ends of the spring are clamped between the fixed clamping plate and the movable clamping plate. A threaded groove is formed on the fixed clamping plate, and a mounting hole is formed on the movable clamping plate. One end of the compression bolt passes through the mounting hole and is threadedly installed inside the threaded groove;

[0008] Positioning members are respectively fixedly installed on the top of the lower mounting plate and the bottom of the upper mounting plate.

[0009] As a preferred technical solution, the positioning member is a positioning hook, and the positioning hook on the upper mounting plate, the positioning hook on the lower mounting plate and the axis of the hydraulic cylinder are on the same straight line.

[0010] As a preferred technical solution, the cover door is a glass door.

[0011] As a preferred technical solution, a chute is formed on one side of the inner wall of the protective cover, and a slider is slidably installed inside the chute. One end of the slider is fixedly connected to one end of the upper mounting plate.

[0012] As a preferred technical solution, a scale line is provided on one side of the inner wall of the protective cover.

[0013] As a preferred technical solution, the compression bolt is a handle bolt.

[0014] The present utility model has at least the following beneficial effects:

[0015] For a spring tensile testing machine provided by the present utility model, by respectively hanging the hanging rings at the upper and lower ends of the spring to be tested on the upper and lower two positioning hooks, and then respectively clamping the two hanging rings at the upper and lower ends of the spring through the clamping members, closing the cover door, starting the hydraulic cylinder to drive the spring to perform a tensile test, during which the stretching length of the spring can be judged by the displacement distance of the upper mounting plate at the scale line. During the whole tensile test process of the spring, the hanging rings at both ends of the spring can be firmly clamped, increasing the stability of the spring stretching and avoiding the spring from falling off during the stretching process. Brief Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0017] Figure 1 is a perspective view of a spring tensile testing machine of the present utility model;

[0018] Figure 2 is a front view of a spring tensile testing machine of the present utility model;

[0019] Figure 3 is a side sectional view of the protective cover of a spring tensile testing machine of the present utility model;

[0020] Figure 4 of the present utility model Figure 3 is an enlarged schematic view of the structure of part A;

[0021] Figure 5 is a schematic view of the structure of the clamping component of a spring tensile testing machine of the present utility model.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 1. Base; 2. Protective cover; 3. Cover door; 4. Hydraulic cylinder; 5. Lower mounting plate; 51. Fixed clamping plate; 511. Threaded groove; 52. Movable clamping plate; 521. Mounting hole; 53. Compression bolt; 54. Positioning hook; 6. Upper mounting plate; 7. Spring; 8. Scale line; 9. Slide groove; 91. Slide block. Detailed Embodiment

[0024] The following will describe in detail the embodiments of the present application in conjunction with the drawings and embodiments, so as to fully understand the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects and implement accordingly.

[0025] Embodiment

[0026] Please refer to Figures 1 to 5As shown in the figure, this embodiment provides a spring tensile testing machine, including: a base 1, on the top of which a protective cover 2 is fixedly installed, and a cover door 3 is movably installed on one side of the protective cover 2; a hydraulic cylinder 4, which is fixedly installed on the top of the protective cover 2, and the telescopic end of the hydraulic cylinder 4 extends into the interior of the protective cover 2; a lower mounting plate 5, which is fixedly installed on the top of the base 1 and is located inside the protective cover 2; an upper mounting plate 6, which is fixedly installed on the telescopic end of the hydraulic cylinder 4; wherein, clamping components for clamping the hanging rings at both ends of the spring 7 are respectively installed on the top of the lower mounting plate 5 and the bottom of the upper mounting plate 6, and the upper and lower clamping components are symmetrically arranged. By means of the clamping components, the stability of the spring 7 during stretching can be increased, and the spring 7 can be prevented from falling off during the stretching process.

[0027] Wherein, the clamping component includes a fixed clamping plate 51, a movable clamping plate 52 and a pressing bolt 53. The hanging rings at both ends of the spring 7 are clamped between the fixed clamping plate 51 and the movable clamping plate 52. A threaded groove 511 is formed on the fixed clamping plate 51, and a mounting hole 521 is formed on the movable clamping plate 52. One end of the pressing bolt 53 passes through the mounting hole 521 and is threadedly installed inside the threaded groove 511; positioning members are respectively fixedly installed on the top of the lower mounting plate 5 and the bottom of the upper mounting plate 6. By tightening the movable clamping plate 52 on the fixed clamping plate 51 with the pressing bolt 53, the hanging rings at both ends of the spring 7 can be clamped between the movable clamping plate 52 and the fixed clamping plate 51, increasing the stability of the spring 7 during stretching and preventing the spring 7 from falling off during the stretching process. In addition, by pressing with the pressing bolt 53, the operation is convenient.

[0028] Wherein, the positioning member is a positioning hook 54. The positioning hook 54 on the upper mounting plate 6, the positioning hook 54 on the lower mounting plate 5 and the axis of the hydraulic cylinder 4 are on the same straight line. The upper and lower positioning hooks 54 can position the spring 7, so that the upper and lower ends of the spring 7 are on the same vertical line, facilitating the quick positioning and clamping of the pulling rings at both ends of the spring 7 by the movable clamping plate 52 and the fixed clamping plate 51.

[0029] Wherein, the cover door 3 is a visible glass door, and the cover door 3 can be tempered glass to increase the service strength. Through the cover door 3, the stretching state of the spring 7 can be directly observed.

[0030] Wherein, a sliding groove 9 is formed on one side of the inner wall of the protective cover 2, and a slider 91 is slidably installed inside the sliding groove 9. One end of the slider 91 is fixedly connected to one end of the upper mounting plate 6, increasing the stability of the up and down movement of the upper mounting plate 6 and further increasing the detection accuracy of the spring 7.

[0031] Wherein, a scale line 8 is provided on one side of the inner wall of the protective cover 2, facilitating the observation of the stretching length of the spring 7. The stretching length of the spring 7 can be judged by the up and down displacement distance of the upper mounting plate 6 at the scale line 8.

[0032] Among them, the pressing bolt 53 is a handle bolt, which facilitates turning the pressing bolt 53 to clamp the hanging rings at both ends of the spring 7.

[0033] As is well known to those skilled in the art, the working principle and wiring method of the hydraulic cylinder 4 are common knowledge, and they all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can arbitrarily select and match its model according to their needs or convenience.

[0034] Working principle: When in use, first hang the upper hanging ring of the spring 7 to be tested on the positioning hook 54 on the mounting plate 6, then hang the lower hanging ring of the spring 7 on the positioning hook 54 on the mounting plate 5, and then clamp the two hanging rings at the upper and lower ends of the spring 7 respectively through the clamping components. First, clamp the lower hanging ring of the spring 7. Press the movable clamping plate 52 against the fixed clamping plate 51 through the pressing bolt 53, so that the lower hanging ring of the spring 7 is clamped between the movable clamping plate 52 and the fixed clamping plate 51, increasing the stability of the spring 7 during stretching. Similarly, clamp the upper hanging ring of the spring 7. When the upper and lower ends of the spring 7 are both clamped, close the cover door 3, and drive the spring 7 to perform a stretching test by starting the hydraulic cylinder 4. During this period, the stretching length of the spring 7 can be judged by the vertical displacement distance of the upper mounting plate 6 at the scale line 8.

[0035] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A spring tensile testing machine, characterized in that: include: A base (1) having a protective cover (2) fixedly mounted on the top thereof, and a cover door (3) movably mounted on one side of the protective cover (2); A hydraulic cylinder (4) is fixedly mounted on the top of the protective cover (2), and a telescopic end of the hydraulic cylinder (4) extends into the interior of the protective cover (2); A lower mounting plate (5) fixedly mounted on the top of the base (1) and located inside the protective cover (2); An upper mounting plate (6) fixedly mounted on the telescopic end of the hydraulic cylinder (4); Wherein, the top of the lower mounting plate (5) and the bottom of the upper mounting plate (6) are respectively provided with clamping components for clamping the hanging rings at both ends of the spring (7), and the upper and lower clamping components are symmetrically arranged; The clamping component comprises a fixed clamping plate (51), a movable clamping plate (52) and a clamping bolt (53); the hanging rings at both ends of the spring (7) are clamped between the fixed clamping plate (51) and the movable clamping plate (52); a threaded groove (511) is provided on the fixed clamping plate (51); a mounting hole (521) is provided on the movable clamping plate (52); one end of the clamping bolt (53) passes through the mounting hole (521) and is threadedly mounted inside the threaded groove (511); Positioning members are fixedly mounted on the top of the lower mounting plate (5) and the bottom of the upper mounting plate (6), respectively. The positioning members are positioning hooks (54). The positioning hooks (54) on the upper mounting plate (6), the positioning hooks (54) on the lower mounting plate (5), and the axes of the hydraulic cylinder (4) are on the same straight line.

2. A spring tensile testing machine according to claim 1, characterized in that: The cover door (3) is a visual glass door.

3. A spring tensile testing machine according to claim 1, characterized in that: A slide groove (9) is provided on one side of the inner wall of the protective cover (2), a slider (91) is slidably mounted inside the slide groove (9), and one end of the slider (91) is fixedly connected to one end of the upper mounting plate (6).

4. A spring tensile testing machine according to claim 3, characterized in that: A scale mark (8) is provided on one side of the inner wall of the protective cover (2).

5. A spring tensile testing machine according to claim 1, characterized in that: The clamping bolt (53) is a handle bolt.

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