Auxiliary device for testing pneumatic valve spring

Abstract

The utility model relates to the technical field of spring testing equipment, in particular to a pneumatic valve spring testing auxiliary device which comprises a base and two inner supporting rods symmetrically arranged on the base in a penetrating mode, and an elastic supporting assembly for pushing any inner supporting rod to horizontally move towards the center is arranged in the base. A centering adjusting assembly is arranged between the two inner supporting rods and used for synchronously adjusting the distance between the two inner supporting rods and the center, and a first strip-shaped through hole allowing the two inner supporting rods to move horizontally is formed in the base in a penetrating mode. By arranging the two inner supporting rods and the elastic supporting assembly and the centering adjusting assembly which are used for adjusting the distance between the two inner supporting rods, to-be-tested springs of different sizes can be internally supported and positioned, deformation of the to-be-tested springs in the testing process is avoided, and the testing precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spring testing equipment, in particular to an auxiliary device for testing pneumatic valve springs. Background Technique

[0002] Springs need to be tested for various performance data, such as the stiffness coefficient and fatigue test of compression springs. The general test method is to place the test spring on the workbench of the test equipment, and the test pressing block presses against the upper end of the test spring and presses it downwards. Various data are displayed on the display screen through sensors.

[0003] In the Chinese patent literature database, a patent with the application number 201620302252.4 discloses a spring test auxiliary device, which includes an auxiliary device body with a through hole inside. The spring to be tested is placed inside the through hole, and the test pressing block is inserted into the through hole and moves up and down inside for testing, which can avoid bending deformation during the test. However, during actual work, it can only test springs that are adapted to the inner diameter. When the through hole is larger than the outer diameter of the spring, it may still cause complete deformation of the spring, affecting the test effect. Summary of the Invention

[0004] The purpose of the utility model is to provide an auxiliary device for testing pneumatic valve springs to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An auxiliary device for testing pneumatic valve springs includes a base and two inner support rods symmetrically penetrating through the base. An elastic support component for horizontally moving any one of the inner support rods towards the center is arranged inside the base. A centering adjustment component is arranged between the two inner support rods, and the centering adjustment component is used to synchronously adjust the distance between the two inner support rods from the center. A first strip-shaped through hole for accommodating the horizontal movement of the two inner support rods penetrates through the base.

[0006] Further, the centering adjustment component includes a gear rotatably arranged at the center inside the base and two racks respectively arranged at the two radial ends of the gear. Both racks are meshed with the gear. One end of each of the two racks away from each other is installed with a slider through a connecting plate. The two sliders correspond to the two inner support rods one by one, and the slider is slidably connected to the inner support rod.

[0007] Further, the slider is slidably connected to the inner support rod through a slide rail, and baffles are fixed at both ends of the inner support rod. The width of the baffle is greater than the width of the first strip-shaped through hole.

[0008] Further, the elastic support assembly includes a fixing plate fixed inside the base, a guiding rod fixed to one end of any one of the racks, and a return spring sleeved on the guiding rod. One end of the guiding rod penetrates through the fixing plate and is fixed with a limiting plate. The return spring is located between the fixing plate and the limiting plate and is used to push the rack towards the center of the base.

[0009] Further, a shifting rod is arranged at one end of any one of the racks through a connecting rod. A second strip-shaped sliding hole for the shifting rod to move back and forth along the moving direction parallel to the rack is arranged through the top end of the base. The top end of the shifting rod passes through the second strip-shaped sliding hole and extends to the outside of the base.

[0010] Further, a support seat is fixed to the bottom end of the base, and the height of the support seat is not less than the length of the inner support rod. An installation portion is arranged by bending the bottom end of the support seat.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The pneumatic valve spring testing auxiliary device can perform inner support positioning on springs to be tested with different sizes by arranging two inner support rods and an elastic support assembly and a centering adjustment assembly for adjusting the distance between the two inner support rods, avoiding deformation of the springs to be tested during the testing process, and improving the testing accuracy.

[0013] By arranging baffles at the upper and lower ends of the inner support rod, the spring to be tested can be limited, avoiding the spring to be tested from popping out with a large elastic force during resetting and improving safety. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model in a testing state;

[0015] Figure 2 is an exploded view of the present utility model;

[0016] Figure 3 is a three-dimensional structural diagram of the present utility model;

[0017] Figure 4 is a three-dimensional structural diagram of the elastic support assembly of the present utility model.

[0018] In the figure: 1. Base; 101. First strip-shaped through hole; 102. Support seat; 103. Second strip-shaped sliding hole; 2. Inner support rod; 201. Baffle; 3. Elastic support assembly; 301. Fixing plate; 302. Guiding rod; 303. Return spring; 304. Limiting plate; 4. Centering adjustment assembly; 401. Gear; 402. Rack; 403. Slide block; 5. Shifting rod; 6. Spring to be tested; 7. Testing press block. Detailed Embodiment

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. In the description of the present utility model, it should be noted that the descriptions of terms such as "first" and "second" are only for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. For the terms "including" and any variations thereof in the specification, claims and above-mentioned drawings of the present utility model, the intention is to cover non-exclusive inclusion.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0021] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a pneumatic valve spring test auxiliary device, including a base 1 and two inner support rods 2 symmetrically penetrating through the base 1. Specifically, the base 1 is a hollow cylindrical structure, the inner support rod 2 is a round rod, a support seat 102 is fixed at the bottom end of the base 1, and the height of the support seat 102 is not less than the length of the inner support rod 2, which is convenient for the up and down movement of the inner support rod 2 when testing the spring. The bottom end of the support seat 102 is bent to be provided with a mounting part, and a plurality of mounting holes are penetrated through the mounting part, and the mounting part can be fixed directly below the test pressing block 7 by bolts.

[0022] An elastic support assembly 3 for horizontally moving any one of the inner support rods 2 towards the center is arranged inside the base 1, a centering adjustment assembly 4 is arranged between the two inner support rods 2, the centering adjustment assembly 4 is used for synchronously adjusting the distance between the two inner support rods 2 from the center, and a first strip-shaped through hole 101 for accommodating the horizontal movement of the two inner support rods 2 is penetrated through the base 1.

[0023] Specifically, referring to the attached Figure 2 , the center adjustment component 4 includes a gear 401 rotatably arranged at the center inside the base 1 and two racks 402 respectively arranged at the radial two ends of the gear 401. Both of the two racks 402 are meshed with the gear 401. One end of each of the two racks 402 away from each other is provided with a slider 403 through a connecting plate. The two sliders 403 correspond to the two inner support rods 2 one by one, and the slider 403 is slidably connected with the inner support rod 2. Specifically, a through hole matching the inner support rod 2 is penetrated through the center of the slider 403, and the inner support rod 2 can slide up and down inside the through hole. When the gear 401 rotates, it can drive the two racks 402 to move synchronously and in opposite directions, and then drive the two inner support rods 2 to move synchronously and in opposite directions through the sliders 403, so as to adjust the distance between the two inner support rods 2 according to the size of the spring 6 to be tested, and at the same time make the spring 6 to be tested always located directly below the test pressing block 7.

[0024] The slider 403 and the inner support rod 2 are slidably connected through a slide rail. Specifically, two slide rails are arranged along the circumferential direction inside the inner hole of the slider 403, and strip-shaped sliding grooves matching the slide rails are arranged along the length direction on the outer side wall of the inner support rod 2, so that the inner support rod 2 and the slider 403 can slide relatively up and down, but cannot rotate relatively. Both ends of the inner support rod 2 are fixed with baffle plates 201. The width of the baffle plate 201 is greater than the width of the first strip-shaped through hole 101. The baffle plate 201 at the top abuts against the edge of the top of the spring 6 to be tested during the test, which can play a role in limiting, avoiding the danger of the spring 6 to be tested popping out. At the same time, the two baffle plates 201 play a role in limiting, avoiding the separation of the inner support rod 2 from the base 1.

[0025] Referring to the attached Figure 4 , the elastic support component 3 includes a fixing plate 301 fixed inside the base 1, a guide rod 302 fixed at one end of any one of the racks 402, and a return spring 303 sleeved on the guide rod 302. One end of the guide rod 302 penetrates through the fixing plate 301 and is fixed with a limiting plate 304. The return spring 303 is located between the fixing plate 301 and the limiting plate 304 and is used to push the rack 402 towards the center of the base 1. When the two inner support rods 2 are not sleeved with the spring 6 to be tested on the outside, under the elastic support of the return spring 303, the two inner support rods 2 open towards both sides. When detection is required, adjusting the distance between the two inner support rods 2 towards the middle can sleeve the springs 6 to be tested with different sizes on the outside of the inner support rods 2, meeting different positioning requirements and avoiding deformation when the test pressing block 7 compresses the spring 6 to be tested downward.

[0026] Furthermore, one end of any rack 402 is provided with a shift lever 5 through a connecting rod. A second strip-shaped sliding hole 103 for accommodating the shift lever 5 to move back and forth along the moving direction parallel to the rack 402 is penetrated through the top end of the base 1. The top end of the shift lever 5 passes through the second strip-shaped sliding hole 103 and extends to the outside of the base 1. By sliding the shift lever 5, the position of the rack 402 can be conveniently adjusted, and the loading and unloading can be carried out more quickly and conveniently.

[0027] Working principle: During assembly, the support base 102 is installed at the working location through bolts. Push the shift lever 5 to move towards the center of the base 1, so that the rack 402, the slider 403 and the inner support rod 2 on one side slide towards the center synchronously. At this time, the limiting plate 304 compresses the return spring 303, and the rack 402 drives the gear 401 to rotate, and then drives the rack 402 and the inner support rod 2 on the other side to move towards the center synchronously, so that the distance between the two inner support rods 2 is reduced, which is convenient for sleeving the spring 6 to be tested outside the two inner support rods 2. The baffle 201 abuts against the top edge of the spring 6 to be tested. During the test, the test pressing block 7 compresses the spring 6 to be tested downward, and the inner support rod 2 moves up and down relative to the slider 403 for guiding and limiting, which can prevent the spring 6 to be tested from bending and deforming and improve the detection accuracy.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. Pneumatic valve spring test auxiliary device, characterized by: The invention comprises a base (1) and two inner support rods (2) symmetrically arranged on the base (1); an elastic support component (3) is arranged inside the base (1) for pushing any one of the inner support rods (2) to move horizontally toward the center; a centering adjustment component (4) is arranged between the two inner support rods (2); the centering adjustment component (4) is used to synchronously adjust the distance between the two inner support rods (2) and the center; and a first strip-shaped through hole (101) is arranged on the base (1) to accommodate the horizontal movement of the two inner support rods (2).

2. The pneumatic valve spring test auxiliary device according to claim 1, characterized in that: The centering adjustment component (4) comprises a gear (401) rotatably arranged at the inner center of the base (1) and two racks (402) respectively arranged at two radial ends of the gear (401), and the two racks (402) are meshed with the gear (401), and the ends of the two racks (402) that are away from each other are both equipped with sliders (403) through a connecting plate, and the two sliders (403) correspond to the two inner support rods (2) one by one, and the sliders (403) are slidably connected to the inner support rods (2).

3. The pneumatic valve spring test auxiliary device according to claim 2, characterized in that: The sliding block (403) is slidably connected to the inner support rod (2) via a slide rail, and baffles (201) are fixed at both ends of the inner support rod (2), wherein the width of the baffles (201) is greater than the width of the first strip-shaped through hole (101).

4. The pneumatic valve spring test auxiliary device according to claim 2, characterized in that: The elastic support assembly (3) comprises a fixed plate (301) fixed inside the base (1), a guide rod (302) fixed to one end of any one of the racks (402), and a return spring (303) sleeved on the guide rod (302); one end of the guide rod (302) passes through the fixed plate (301) and is fixed to a limit plate (304); the return spring (303) is located between the fixed plate (301) and the limit plate (304) and is used to push the rack (402) to move toward the center of the base (1).

5. The pneumatic valve spring test auxiliary device according to claim 1, characterized in that: A lever (5) is provided at one end of any rack (402) via a connecting rod, and a second strip-shaped sliding hole (103) is provided through the top end of the base (1) for accommodating the lever (5) to move back and forth along a moving direction parallel to the rack (402), and the top end of the lever (5) passes through the second strip-shaped sliding hole (103) and extends to the outside of the base (1).

6. The pneumatic valve spring test auxiliary device according to claim 1, characterized in that: A support seat (102) is fixed to the bottom end of the base (1), and the height of the support seat (102) is not less than the length of the inner support rod (2). A mounting portion is bent at the bottom end of the support seat (102).

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