Constant force value loading device

Abstract

The utility model discloses a constant force value loading device, comprising two clamping plates which are symmetrically arranged on two sides of the constant force value loading device; one side of the adjusting device is connected to the side, close to the other clamping plate, of one clamping plate, and the adjusting device comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod and an eighth connecting rod which are sequentially connected end to end; one side of the force value sensor is connected to the other side of the adjusting device, and the other side of the force value sensor is connected to the clamping plate. The constant force value loading device solves the problems that an air cylinder loading mechanism is unstable in air source pressure and inaccurate in loading force value, and an oil cylinder loading mechanism is high in cost, and has the advantages of being simple in structure, stable in loading pressure, accurate in pressure value, low in cost, small in size and convenient to carry.

Description

Technical Field

[0001] The utility model relates to the field of force value testing, in particular to a constant force value loading device. Background Art

[0002] The shock absorber of a car is also called "suspension", which is composed of springs and shock absorbers. The shock absorber is not used to support the weight of the car body, but to suppress the shock when the spring rebounds after absorbing the shock and absorb the energy of the road impact. The spring plays the role of mitigating the impact, turning the "large energy single impact" into "small energy multiple impacts", and the shock absorber is to gradually reduce the "small energy multiple impacts". If you have driven a car with a broken shock absorber, you can experience the bounce of the car after passing through every pothole and ups and downs, and the shock absorber is used to suppress this bounce. Without the shock absorber, the rebound of the spring cannot be controlled. The car will bounce severely when encountering a rugged road surface, and the tire's grip and tracking will be lost due to the ups and downs of the spring when turning.

[0003] When shock absorbers are produced, they are usually subjected to durability tests, which include lateral force loading tests. The mechanisms that can currently load lateral forces on shock absorbers include air cylinder loading mechanisms and oil cylinder loading mechanisms. Air cylinder connection requires a compressed air source, which consumes a lot of energy. When the air source pressure is unstable, the loading force value will be inaccurate, resulting in uncertainty in the test results. Oil cylinder connection: A relatively stable force value can be obtained, but a hydraulic loading system is required, which is more expensive. Utility Model Content

[0004] The main purpose of the utility model is to provide a constant force value loading device, which overcomes the above technical problems.

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

[0006] Constant force loading device, including:

[0007] Clamping plates, two clamping plates are symmetrically arranged on both sides of the constant force loading device;

[0008] An adjusting device, one side of which is connected to a side of one of the clamping plates close to the other clamping plate, comprising:

[0009] The first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod, the fifth connecting rod, the sixth connecting rod, the seventh connecting rod, and the eighth connecting rod are connected in sequence end to end, wherein:

[0010] A first connecting rod is connected to one of the clamping plates, and a second connecting rod is connected to the first connecting rod rotatably around a first axis, and the first axis is perpendicular to the first connecting rod;

[0011] The third connecting rod is connected to the second connecting rod so as to be rotatable about a second axis, and the second axis is perpendicular to the third connecting rod;

[0012] The fourth connecting rod is connected to the third connecting rod so as to be rotatable about the third axis, and the third axis is perpendicular to the fourth connecting rod;

[0013] The fifth connecting rod is connected to the fourth connecting rod and can rotate around a fourth axis, and the fourth axis is perpendicular to the fifth connecting rod;

[0014] The sixth connecting rod is connected to the fifth connecting rod so as to be rotatable about a fifth axis, and the fifth axis is perpendicular to the sixth connecting rod;

[0015] The seventh connecting rod is connected to the sixth connecting rod so as to be rotatable about a sixth axis, and the sixth axis is perpendicular to the seventh connecting rod;

[0016] One end of the eighth connecting rod is connected to the seventh connecting rod so as to be rotatable around the seventh axis, and the seventh axis is perpendicular to the eighth connecting rod;

[0017] The other end of the eighth connecting rod is connected to the first connecting rod so as to be rotatable around an eighth axis, and the eighth axis is perpendicular to the first connecting rod;

[0018] A force sensor, one side of which is connected to the other side of the adjusting device, and the other side of which is connected to the clamping plate.

[0019] Furthermore, the adjusting device further comprises:

[0020] The threaded rod, the third connecting rod and the seventh connecting rod are all provided with through holes that can just allow the threaded rod to pass through, and the threaded rod can pass through the third connecting rod and the seventh connecting rod at the same time;

[0021] Locknut, which allows radial movement on the threaded rod.

[0022] Furthermore, a servo cylinder is provided between the third connecting rod and the seventh connecting rod, and two ends of the servo cylinder are respectively connected to the third connecting rod and the seventh connecting rod to drive and adjust the distance between the third connecting rod and the seventh connecting rod.

[0023] Furthermore, the clamping plate includes a first part and a second part, and the first part and the second part are connected by bolt connection.

[0024] Furthermore, after the first part and the second part are tightly attached, there is an accommodation space in the middle for the shock absorber to be placed therein.

[0025] Furthermore, the connection between the splint and the adjusting device, and between the splint and the force sensor is a detachable link.

[0026] Furthermore, washers are provided between the clamping plate and the adjusting device, and between the clamping plate and the force sensor.

[0027] Furthermore, the adjustment device and the force sensor are detachably connected.

[0028] Furthermore, a gasket is provided between the adjusting device and the force sensor.

[0029] Furthermore, the seventh connecting rod is provided with a threaded device cooperating with the threaded rod.

[0030] The constant force loading device of the utility model solves the problems of unstable air source pressure of the cylinder loading mechanism, inaccurate loading force value and high cost of the cylinder loading mechanism. It has the advantages of simple structure, stable loading pressure, accurate pressure value, low cost, small size and easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0032] Figure 1 The overall structural schematic diagram of the constant force value loading device of the utility model is shown.

[0033] Figure 2 The top view of the constant force loading device of the utility model is shown.

[0034] The above drawings include the following reference numerals:

[0035] 1. Clamp; 2. Adjustment device; 3. Force sensor; 4. Washer; 11. First part; 12. Second part; 20. First connecting rod; 21. Second connecting rod; 22. Third connecting rod; 23. Fourth connecting rod; 24. Fifth connecting rod; 25. Sixth connecting rod; 26. Seventh connecting rod; 27. Eighth connecting rod; 28. Threaded rod; 29. ​​Anti-loosening nut. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] Reference below Figure 1 to Figure 2 , the utility model is further described as follows:

[0040] Constant force loading device, including:

[0041] Clamp 1, two clamps are symmetrically arranged on both sides of the constant force loading device;

[0042] The adjusting device 2, one side of which is connected to one side of one of the clamping plates 1 close to the other clamping plate 1, comprises:

[0043] The first connecting rod 20, the second connecting rod 21, the third connecting rod 22, the fourth connecting rod 23, the fifth connecting rod 24, the sixth connecting rod 25, the seventh connecting rod 26, and the eighth connecting rod 27 are connected in sequence end to end, wherein:

[0044] The first connecting rod 20 is connected to one of the splints 1, the second connecting rod 21 is connected to the first connecting rod 20 rotatably around a first axis, and the first axis is perpendicular to the first connecting rod 20; the third connecting rod 22 is connected to the second connecting rod 21 rotatably around a second axis, and the second axis is perpendicular to the third connecting rod 22; the fourth connecting rod 23 is connected to the third connecting rod 22 rotatably around a third axis, and the third axis is perpendicular to the fourth connecting rod 23; the fifth connecting rod 24 is connected to the fourth connecting rod 23 rotatably around a fourth axis, and the fourth axis is perpendicular to the fifth connecting rod 24; the sixth connecting rod 25 is connected to the fifth connecting rod 24 rotatably around a fifth axis, and the fifth axis is perpendicular to the sixth connecting rod 25; the seventh connecting rod 26 is connected to the sixth connecting rod 25 rotatably around a sixth axis, and the sixth axis is perpendicular to the seventh connecting rod 26; one end of the eighth connecting rod 27 is connected to the seventh connecting rod 26 rotatably around a seventh axis, and the seventh axis is perpendicular to the eighth connecting rod 27; the other end of the eighth connecting rod 27 is connected to the first connecting rod 20 rotatably around an eighth axis, and the eighth axis is perpendicular to the first connecting rod 20;

[0045] The force sensor 3 has one side connected to the other side of the adjusting device 2 , and the other side connected to the clamping plate 1 .

[0046] When conducting a shock absorber durability test, a constant force loading device is placed between two shock absorbers, two clamping plates 1 are respectively pressed against the shock absorbers, and then the force sensor 3 is connected, and then the shock absorber durability test can be started.

[0047] In this embodiment, the adjusting device further includes:

[0048] The threaded rod 28, the third connecting rod 22 and the seventh connecting rod are all provided with through holes that can just allow the threaded rod 28 to pass through, and the threaded rod 28 can pass through the third connecting rod 22 and the seventh connecting rod 26 at the same time;

[0049] The anti-loosening nut 29 can move radially on the threaded rod 28.

[0050] The seventh connecting rod 26 is provided with a threaded device that cooperates with the threaded rod 28 .

[0051] When it is necessary to load lateral force on the shock absorber during the experiment, rotate the threaded rod 28, and the anti-loosening nut 29 drives the distance between the third connecting rod 22 and the seventh connecting rod 26 to decrease, and at the same time, the two side clamps 1 move horizontally, and the distance between the two clamps 1 decreases. When the distance is shortened to the point where the device can be placed between the two shock absorbers, rotate the threaded rod 28 in the opposite direction to increase the distance between the two clamps 1, so that the two clamps 1 contact the shock absorbers on both sides respectively and generate force. Continue to tighten the threaded rod 28, observe the indication on the force sensor 3, and stop loading until the force reaches the set force value. Tighten the anti-loosening nut 13 and the loading is completed. During the test, the sensor force value can be regularly observed and adjusted in time.

[0052] In an optional embodiment, a servo cylinder is provided between the third connecting rod 22 and the seventh connecting rod 26 , and two ends of the servo cylinder are respectively connected to the third connecting rod 22 and the seventh connecting rod 26 to drive the adjustment of the distance between the third connecting rod 22 and the seventh connecting rod 26 .

[0053] The use of servo cylinders can more accurately control the loading force value, making the experimental data more accurate and eliminating the trouble of manual screwing.

[0054] In this embodiment, the clamping plate 1 includes a first part 11 and a second part 12, and the first part 11 and the second part 12 are connected by bolts. After the first part 11 and the second part 12 are pressed tightly together, there is a receiving space in the middle position for the shock absorber to be placed. The size of the receiving space can be controlled by rotating the bolt, which can adapt to shock absorbers of different specifications and increase the application range of the constant force value loading device.

[0055] In this embodiment, the connection between the clamping plate 1 and the adjusting device 2, and between the clamping plate 1 and the force sensor 3 is a detachable link. When any of the components fails, it can be removed and replaced with a new component, and the detachable connection is convenient for replacement and maintenance.

[0056] In this embodiment, washers 4 are provided between the clamping plate 1 and the adjusting device 2, and between the clamping plate 1 and the force sensor 3. Washers 4 are provided between the adjusting device 2 and the force sensor 3.

[0057] The use of the gasket 4 can effectively reduce the friction between the components during long-term use, reduce the degree of equipment wear, and effectively increase the service life of the product.

[0058] In this embodiment, the adjusting device 2 and the force sensor 3 are detachably connected. In addition to the aforementioned convenience for replacement and maintenance, the detachable connection also facilitates replacement of the force sensor 3. In different experiments, shock absorbers of different specifications have different requirements for the loading value of the lateral force, and different force sensors 3 have different force detection ranges. Replacing the force sensor 3 can enable the product to adapt to force experiments with different requirements.

[0059] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Constant force loading device, characterized in that: include: Clamping plates (1), wherein two clamping plates (1) are symmetrically arranged on both sides of the constant force value loading device; An adjusting device (2), one side of which is connected to a side of one of the clamping plates (1) close to the other clamping plate (1), comprising: A first connecting rod (20), a second connecting rod (21), a third connecting rod (22), a fourth connecting rod (23), a fifth connecting rod (24), a sixth connecting rod (25), a seventh connecting rod (26), and an eighth connecting rod (27) are connected in sequence end to end, wherein: The first connecting rod (20) is connected to one of the clamping plates (1), and the second connecting rod (21) is connected to the first connecting rod (20) so as to be rotatable around a first axis, wherein the first axis is perpendicular to the first connecting rod (20); The third connecting rod (22) is connected to the second connecting rod (21) so as to be rotatable around a second axis, and the second axis is perpendicular to the third connecting rod (22); The fourth connecting rod (23) is connected to the third connecting rod (22) so as to be rotatable around a third axis, and the third axis is perpendicular to the fourth connecting rod (23); The fifth connecting rod (24) is connected to the fourth connecting rod (23) so as to be rotatable about a fourth axis, and the fourth axis is perpendicular to the fifth connecting rod (24); The sixth connecting rod (25) is connected to the fifth connecting rod (24) so ​​as to be rotatable about a fifth axis, and the fifth axis is perpendicular to the sixth connecting rod (25); The seventh connecting rod (26) is connected to the sixth connecting rod (25) so as to be rotatable around a sixth axis, and the sixth axis is perpendicular to the seventh connecting rod (26); One end of the eighth connecting rod (27) is connected to the seventh connecting rod (26) so as to be rotatable around a seventh axis, and the seventh axis is perpendicular to the eighth connecting rod (27); The other end of the eighth connecting rod (27) is connected to the first connecting rod (20) so as to be rotatable around an eighth axis, and the eighth axis is perpendicular to the first connecting rod (20); A force sensor (3), one side of the force sensor (3) is connected to the other side of the adjustment device (2), and the other side is connected to the clamping plate (1).

2. The constant force loading device according to claim 1, characterized in that: The adjusting device also includes: A threaded rod (28), wherein the third connecting rod (22) and the seventh connecting rod are both provided with a through hole just enough for the threaded rod (28) to pass through, and the threaded rod (28) can pass through the third connecting rod (22) and the seventh connecting rod (26) at the same time; A locking nut (29) is movable radially on the threaded rod (28).

3. The constant force loading device according to claim 1, characterized in that: A servo cylinder is arranged between the third connecting rod (22) and the seventh connecting rod (26), and two ends of the servo cylinder are respectively connected to the third connecting rod (22) and the seventh connecting rod (26), so as to drive and adjust the distance between the third connecting rod (22) and the seventh connecting rod (26).

4. The constant force loading device according to claim 1, characterized in that: The clamping plate (1) comprises a first part (11) and a second part (12), and the first part (11) and the second part (12) are connected by bolts.

5. The constant force loading device according to claim 4, characterized in that: After the first part (11) and the second part (12) are tightly attached, there is a receiving space in the middle for the shock absorber to be placed therein.

6. The constant force loading device according to claim 1, characterized in that: The connection between the clamping plate (1) and the adjusting device (2), and between the clamping plate (1) and the force sensor (3) is a detachable connection.

7. The constant force loading device according to claim 6, characterized in that: Washers (4) are provided between the clamping plate (1) and the adjusting device (2), and between the clamping plate (1) and the force sensor (3).

8. The constant force loading device according to claim 1, characterized in that: The regulating device (2) and the force sensor (3) are detachably connected.

9. The constant force loading device according to claim 7, characterized in that: The gasket (4) is arranged between the adjusting device (2) and the force sensor (3).

10. The constant force loading device according to claim 2, characterized in that: The seventh connecting rod (26) is provided with a threaded device that cooperates with the threaded rod (28).

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