Cylindrical spring force measurement protection device with large height-diameter ratio

Abstract

The utility model discloses a force measurement protection device for a cylindrical spring with a large height-diameter ratio, and the device comprises a pedestal, a sliding direction guide pin, and a limiting device, which are disposed on a workbench of a spring detection device. A through hole in sliding fit with the sliding direction guide pin and a hole connected with a lower workbench of the spring pressure detection equipment are formed in the axis of the sliding direction guide pin; the sliding direction guide pin is of a cylindrical revolving body structure shaped like a Chinese character'zhong ', and the outer edge of an upper boss of the sliding direction guide pin is pressed into a platform hole capable of moving up and down in the upper portion of the spring pressure detection equipment and fixed through a set screw on a platform face capable of moving up and down so that the sliding direction guide pin can move up and down along with the platform. The limiting device is of a boss cylindrical structure, and a stepped hole matched with the outer edge of the upper portion of the base and a through hole in sliding fit with the sliding direction guide pin are formed in the axis of the limiting device. The device is simple in structure, convenient to manufacture and assemble, high in applicability, low in cost and simple in adjustment and replacement operation, and can be applied to force measurement detection of cylindrical springs with different specifications and large height-diameter ratios.

Description

Technical Field

[0001] The utility model relates to the technical field of spring processing and detection, in particular to a force measuring and protecting device for a cylindrical spring with a large height-to-diameter ratio. Background Art

[0002] Currently, the spring processing and testing industry is plagued by a large number of cylindrical springs with identical structures but varying lengths, inner and outer diameters, and high aspect ratios. These high-aspect-ratio springs require spring pressure testing equipment to verify their functional performance. Traditionally, the spring under test is placed directly on the testing platform of the spring pressure testing equipment. The platform is then moved downward to press against the spring under test. Under external force, the spring is compressed to a specified length. The pressure displayed by the testing equipment indicates whether the spring meets its functional requirements. This traditional method works well for springs with small aspect ratios, but is inadequate for springs with large aspect ratios. This is primarily because the slender springs cannot be kept stable on the working platform. Furthermore, manually holding the spring while the platform is moved downward can easily injure the hand holding the spring during compression. This can also result in the spring bending in the middle, and improper operation can cause the spring to fly off the working platform, injuring the operator or those nearby. This fails to guarantee personal safety and ensures that the spring meets its functional requirements. Utility Model Content

[0003] The present utility model aims to address the shortcomings of the prior art by providing a force measuring and protecting device for cylindrical springs with a large aspect ratio. This device prevents spring bending during compression and prevents the tested spring from flying off the work platform during improper operation, potentially injuring the operator or personnel nearby. Furthermore, by simply replacing the base, guide pins, and stoppers of different sizes, cylindrical springs with varying lengths and diameters can be detected, thereby completing a new force measuring and protecting device for cylindrical springs with a large aspect ratio. The device features a simple structure, easy manufacture, convenient operation, high versatility, and low cost. Furthermore, during testing, the spring always moves within the guide pins and stoppers, preventing spring bending during compression and the tested spring from flying off the work platform during improper operation, potentially injuring the operator or personnel nearby. This device significantly improves the force measuring capability of cylindrical springs, shortens the spring testing cycle, and significantly increases the detection rate, thereby protecting the safety of operators and those around the work area.

[0004] The technical solution of this utility model is a cylindrical spring force measuring and protection device with a large height-to-diameter ratio. The cylindrical spring force measuring and protection device with a large height-to-diameter ratio includes a base mounted on a workbench of a spring testing device, a sliding direction guide pin, and a limit device. The base is a cylindrical boss structure, with a through hole formed on its axis to slide with the sliding direction guide pin and a stepped hole connected to the lower workbench of the spring pressure testing device; the sliding direction guide pin is a cylindrical rotating body structure with a through hole formed on its axis to reduce the pressure. The outer edge of the upper boss is pressed into the hole of the upper platform of the spring pressure testing device, and is fixed by a set screw on the surface of the movable platform, so that it can move up and down with the platform. The outer diameter of the lower boss passes through the inner diameter of the cylindrical spring to be tested and moves downward with the mobile platform into the through hole on the axis of the base that slides with the sliding direction guide pin; the limiting device has the appearance of a boss cylindrical structure, and its axis is provided with a step hole that cooperates with the upper outer edge of the base and a through hole that slides with the sliding direction guide pin. A step hole slightly larger than the outer edge of the cylindrical spring to be tested is provided on the upper end of the through hole, and the depth of the step hole is the length of the cylindrical spring to be tested after compression.

[0005] Furthermore, the sliding direction guide pin is machined and formed, and a through hole for lightening is formed on the axis of the direction guide pin, a cylinder connected to the spring pressure detection equipment is formed on the upper end, and a cylinder with an outer diameter smaller than the inner diameter of the cylindrical spring to be detected is formed on the lower end, and its length is greater than the length of the cylindrical spring to be detected.

[0006] Furthermore, the outer side of the lower end of the sliding direction guide pin is chamfered to facilitate passing through the cylindrical spring.

[0007] The device can determine the inner and outer diameters of cylindrical springs of different lengths and different inner and outer diameters by simply replacing bases, sliding direction guide pins, and limit devices of different sizes, thereby completing a new set of cylindrical spring force measurement and protection devices with a large aspect ratio.

[0008] The beneficial effects of the utility model are as follows: the device has a simple structure, is easy to manufacture, is convenient to assemble, has strong applicability, is low in cost, is easy to adjust and replace, and can be used for force measurement of cylindrical springs with different specifications and large aspect ratios. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments of the present invention and, together with the specification, explaining the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0010] Figure 1 1 is a schematic diagram of the structure of the cylindrical spring force measuring protection device with a large aspect ratio provided by the present invention before compression;

[0011] Figure 2 1 is a schematic diagram of the structure of the cylindrical spring force measuring protection device with a large aspect ratio provided by the present invention after compression;

[0012] Figure 3 A schematic diagram of the base structure provided by the utility model;

[0013] Figure 4 This is a schematic diagram of the sliding direction guide pin structure provided by the utility model;

[0014] Figure 5 A schematic diagram of the structure of the limiting device provided by the utility model;

[0015] Figure 6 A top view of the limiting device provided by the utility model;

[0016] In the attached figure:

[0017] 1-base, 11-upper boss 1, 12-lower boss 1, 111-through hole 1, 121-mounting hole

[0018] 2-sliding direction guide pin, 21-boss 2, 22-middle boss, 23-lower boss 2, 24-through hole 3

[0019] 3-limiting device, 31-upper boss three, 32-lower boss three, 311-detection hole, 321-limiting hole, 322-through hole two

[0020] 4-Cylindrical spring, 5-Spring pressure testing equipment. DETAILED DESCRIPTION

[0021] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0022] See also Figure 1-6 The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0023] Figure 1-6The utility model shows a schematic structural diagram of a cylindrical spring force measuring protection device with a large aspect ratio, which includes a base 1, a sliding direction guide pin 2, and a limit device 3. The base 1 is in the shape of a boss cylinder, including an upper boss 11 and a lower boss 12. The lower boss 12 is provided with a mounting hole 121 and is connected to the lower workbench of the spring pressure detection device 5. The upper boss 11 is provided with a through hole 111 along the central axis, and the through hole 111 is connected to the mounting hole 121; the sliding direction guide pin 2 is a Chinese-shaped cylindrical rotating body structure, including an upper boss 21, a middle boss 22 and a lower boss 23. The lower boss 23 cooperates with the through hole 111 to move up and down, and the length of the lower boss 23 is greater than that of the cylindrical spring 4. The length of the upper boss 21 is fixedly screwed into a vertically movable platform hole on the upper portion of the spring pressure testing device 5. The outer diameter of the middle boss 22 is larger than the outer diameter of the cylindrical spring 4. The cylindrical boss structure of the stopper device 3 includes an upper boss 31 and a lower boss 32. The lower boss 32 is provided with a stopper hole 321 that matches the outer diameter of the upper boss 11. Above the stopper hole 321 is a through hole 22 that matches the outer diameter of the lower boss 23. The boss 31 is provided with a detection hole 311. The inner diameter of the detection hole 311 is slightly larger than that of the cylindrical spring 4 and its depth is the length of the compressed cylindrical spring 4. The detection hole 311 is connected to the stopper hole 321 and the through hole 22. The sliding direction guide pin 2 is provided with a through hole 324 along the central axis for relief. The lower end of the lower boss 23 is chamfered to facilitate the passage of the cylindrical spring 4.

[0024] Install the mounting hole 121 on the bottom surface of the base 1 into a coaxial pin on the hole in the lower workbench and upper movable platform of the spring pressure testing device 5. Then, install the stopper hole 321 on the lower boss 32 of the stopper 3 onto the upper boss 11 of the base 1. Press the sliding direction guide pin 2 into the hole in the upper movable platform of the spring pressure testing device 5, and secure the set screw so that it can move up and down with the platform. This completes a cylindrical spring force measurement protection device with a high aspect ratio.

[0025] The specific operation is to raise the upper mobile platform of the spring pressure detection device, and its sliding direction guide pin 2 will also rise. The cylindrical spring 4 to be tested is placed in the detection hole 311 on the upper part of the limit device 3. The spring pressure detection device 5 is operated to lower the mobile platform, and the sliding direction guide pin 2 will also move downward and enter the inner diameter of the cylindrical spring 4 to be tested. When the lower end surface of the middle boss 22 of the sliding direction guide pin 2 presses against the upper part of the cylindrical spring 4 to be tested, the lower boss 23 of the sliding direction guide pin 2 will enter the through hole 111 on the axis of the base 1, which is slidably matched with the sliding direction guide pin. When the lower end surface of the middle boss 22 of the sliding direction guide pin 2 is in contact with the upper end surface of the upper boss 31 of the limit device 3, the pressure value displayed by the spring pressure detection device 5 is the test data.

[0026] The device is easy to operate, and the operator only needs to put the cylindrical spring to be tested into the cylindrical spring force measuring and protection device with a large height-to-diameter ratio, and operate the spring pressure testing equipment to lower the mobile platform to complete the pressure value data detection; it is safe and reliable, and during the spring testing process, the spring always moves within the sliding direction guide pin and the limit device to avoid the spring bending to the middle during compression and the tested spring flying out of the working platform due to improper operation to injure the operator and people around the working platform; the conversion is convenient; the conversion is convenient, and the operator can also realize the testing of cylindrical springs with different lengths and different inner and outer diameters according to the inner and outer diameters of cylindrical springs with a large height-to-diameter ratio by simply replacing bases, sliding direction guide pins, and limit devices of different sizes; in this way, the labor intensity and safety risks of the operator can be reduced, the production efficiency can be improved, and the operating safety of the spring force tester can be better protected;

[0027] The device has simple structure, convenient manufacturing, convenient operation, strong versatility, low cost, simple adjustment and replacement, and can better protect the safety of spring force testers.

[0028] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. Any modification or equivalent substitution of the technical solution of the present invention made by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A cylindrical spring force measuring protection device with a large height-to-diameter ratio, characterized in that: The invention comprises a base (1), a sliding direction guide pin (2), and a limiting device (3). The base (1) is in the shape of a boss cylinder, including an upper boss (11) and a lower boss (12). The lower boss (12) is provided with a mounting hole (121) and is connected to the lower workbench of the spring pressure detection device (5). The upper boss (11) is provided with a through hole (111) along the central axis, and the through hole (111) is connected to the mounting hole (121). The sliding direction guide pin (2) is a Chinese-shaped cylindrical rotating body structure, including an upper boss (21), a middle boss (22) and a lower boss (23). The lower boss (23) is matched with the through hole (111) to move up and down. The length of the lower boss (23) is greater than the length of the cylindrical spring (4), and the outer diameter passes through the inner diameter of the cylindrical spring (4). The upper boss 2 (21) is fixedly connected to the upper platform hole of the spring pressure detection device (5) by a fastening screw, and the outer diameter of the middle boss (22) is larger than the outer diameter of the cylindrical spring (4); the boss cylindrical structure of the limiting device (3) includes an upper boss 3 (31) and a lower boss 3 (32), the lower boss 3 (32) is provided with a limiting hole (321) that matches the outer diameter of the upper boss 1 (11), and a through hole 2 (322) that matches the outer diameter of the lower boss 2 (23) is provided above the limiting hole (321), the boss 3 (31) is provided with a detection hole (311), the inner diameter of the detection hole (311) is slightly larger than the cylindrical spring (4) and the depth is the length of the cylindrical spring (4) after compression, and the detection hole (311) is connected with the limiting hole (321) and the through hole 2 (322).

2. The cylindrical spring force measuring protection device with a large aspect ratio according to claim 1, characterized in that: The sliding direction guide pin (2) is provided with a third through hole (24) along the central axis.

3. The cylindrical spring force measuring protection device with a large aspect ratio according to claim 1, characterized in that: The outer side of the lower end of the second lower boss (23) is a chamfered structure.

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