Friction testing device for inner diameter and outer diameter of flocked spring

Abstract

The utility model belongs to the technical field of friction coefficient measurement, and particularly relates to a flocked spring inner and outer diameter friction testing device which comprises a friction testing machine, an inner friction detection mechanism and an outer friction detection mechanism, the internal friction detection mechanism comprises a supporting seat, a sliding rod and a clamping sleeve, the top side of the clamping sleeve is connected with a detection station, and the clamping sleeve is used for clamping the outer diameter of a spring; the supporting seat is arranged on a moving table of the friction testing machine, one end of the sliding rod is connected with the supporting seat, the other end of the sliding rod penetrates through the spring in the clamping sleeve, and the upper surface of the inner diameter of the spring is supported on the sliding rod. The outer friction detection mechanism comprises a friction bottom plate, a supporting rod and a clamping plate, the friction bottom plate is arranged at the top of the moving table, the top side of the clamping plate is connected with the other detection station, the supporting rod is arranged at the bottom side of the clamping plate and forms a clamping position, when the supporting rod is sleeved with the spring, the clamping position clamps the top side of the spring, and the bottom of the spring is supported on the friction bottom plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of friction testing, and particularly relates to a flocked spring inner and outer diameter friction testing device. Background Technique

[0002] At present, flocked springs are mostly used in telescopic mechanisms, which can provide a certain elastic force for the telescopic mechanism when it is opened, facilitating the opening of the telescopic mechanism. Flocking the surface of the spring can reduce problems such as the friction between the spring and the cylinder block. For example, in the automatic opening structure of an electric tailgate of a car, when the car tailgate is opened or closed, the spring expands or compresses; in the state where the spring reciprocally stretches and compresses, both the inner surface and the outer surface of the spring will friction with the structure of the telescopic mechanism. For example, an electric tailgate balance rod, an electric tailgate balance structure and an electric tailgate disclosed in the Chinese patent document with the publication number CN110130764B include a first telescopic structure and a compression spring. The first telescopic structure includes a first sleeve and a second sleeve. The first end of the second sleeve is arranged inside the first sleeve and can perform telescopic movement inside the first sleeve. The compression spring is sleeved inside the first telescopic structure; the electric tailgate balance rod can perform telescopic movement driven by an electric strut. During the telescopic movement, the outer surface of the spring will friction with the second sleeve, and the inner surface will friction with the cylinder sleeve. Therefore, the friction coefficient of the spring is very important. In the industry, in order to reduce the friction of the spring, it is necessary to flock the surface of the spring.

[0003] Flocking the surface of the spring requires applying a layer of glue on the surface of the spring, and fixing the fluff on the surface of the spring through adhesion. However, the flocking on the surface of the spring will fall off during use, so the wear resistance coefficient of the spring surface is very important. However, in the prior art, after the spring is flocked, it is generally directly applied to the telescopic mechanism. Therefore, it is very difficult to know the wear resistance of the spring surface, and it is impossible to timely adjust parameters such as the material of the flocking on the spring surface, the length of the fluff, and the density of the flocking. Content of the Utility Model

[0004] The purpose of the utility model is to provide a flocked spring inner and outer diameter friction testing device, which can detect the wear resistance coefficient of the flocked spring, and can adjust the optimal flocking scheme on the spring surface according to the friction coefficient to meet the actual use requirements.

[0005] To achieve the above purpose, a flocked spring inner and outer diameter friction testing device provided by an embodiment of the utility model includes a friction testing machine. The friction testing machine is provided with two detection stations, and also includes an inner friction detection mechanism and an outer friction detection mechanism, which are respectively arranged at the bottoms of the two working positions of the friction testing machine;

[0006] The internal friction detection mechanism includes a support base, a sliding rod and a clamping sleeve. The top side of the clamping sleeve is connected to one of the detection stations, and the clamping sleeve is used to clamp the outer diameter of the spring. The support base is arranged on the moving table of the friction testing machine. One end of the sliding rod is connected to the support base, and the other end passes through the spring inside the clamping sleeve, and the upper surface of the inner diameter of the spring is supported on the sliding rod.

[0007] The external friction detection mechanism includes a friction bottom plate, a support rod and a clamping plate. The friction bottom plate is arranged on the top of the moving table. The top side of the clamping plate is connected to the other detection station. The support rod is arranged on the bottom side of the clamping plate and forms a clamping position. When the spring is sleeved on the support rod, the clamping position clamps the top side of the spring, and the bottom of the spring is supported on the friction bottom plate.

[0008] Furthermore, there are two groups of the support bases, which are symmetrically arranged on the moving table, and both ends of the sliding rod are respectively supported on the two support bases.

[0009] Furthermore, the support base is provided with a support hole, the diameter of the support hole is larger than the diameter of the sliding rod. A screw hole is arranged on the outside of the support base, and the screw hole communicates with the support hole. A locking screw is arranged in the screw hole for locking the sliding rod in the support hole.

[0010] Furthermore, the clamping sleeve includes a top plate and a bottom plate. Arc grooves are arranged on the bottom side of the top plate and the top side of the bottom plate. Connecting holes which are connected to each other are arranged on the top plate and the bottom plate.

[0011] Furthermore, connecting nails are arranged at both ends of the clamping plate. The connecting nails connect the support rod and are used to limit both ends of the spring.

[0012] Furthermore, the detection station includes a vertical rod, a lifting block, a cross rod, a guiding block and a weight seat. The vertical rod is arranged on the main body of the friction testing machine. The lifting block is sleeved on the vertical rod in a slidable manner up and down. The cross rod passes through the lifting block in a slidable manner. The guiding block is arranged at one end of the cross rod. The guiding block is provided with a guiding hole which penetrates up and down. The weight seat passes through the guiding hole in a freely slidable manner. A limiting portion is arranged at the top end of the weight seat for limiting on the top side of the guiding block. A connecting seat is arranged at the bottom end. The clamping plate or the clamping sleeve is connected to the bottom side of the connecting seat. A sleeve rod extends upwards from the top side of the limiting portion for sleeving weights.

[0013] One or more of the above technical solutions in the flocked spring inner and outer diameter friction testing device provided by the embodiment of the present utility model at least have the following technical effects:

[0014] When detecting the friction coefficient of the inner side of the spring, the flocked spring can be clamped in the clamping sleeve, and the sliding rod passes through the inner diameter of the spring. Under the action of the gravity of the clamping sleeve, the spring, etc., the upper surface of the inner diameter of the spring supports on the sliding rod. The moving table of the friction testing machine drives the sliding rod to move back and forth continuously, so as to detect the friction coefficient of the inner surface of the spring.

[0015] When detecting the friction coefficient of the outer surface of the spring, the spring is sleeved on the support rod, and the support rod is connected to the clamping plate to fix the spring. Under the action of the outer friction detection mechanism and the gravity of the spring, the lower surface of the spring supports on the friction bottom plate, and the moving table drives the friction bottom plate to move back and forth. Therefore, the friction coefficient of the outer surface of the spring can be detected by the friction testing machine.

[0016] According to the detected friction coefficients of the inner surface and the outer surface of the spring, the specific parameters of spring flocking can be adjusted, such as the material of the fluff, the model of the glue, the flocking density and length of the fluff, etc., so as to achieve the optimal flocking scheme and meet the actual use requirements. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural diagram of the flocked spring inner and outer diameter friction testing device provided by the embodiment of the present invention.

[0019] Figure 2 It is a left view of the flocked spring inner and outer diameter friction testing device provided by the embodiment of the present invention.

[0020] Figure 3 It is a cross-sectional view of the outer friction detection mechanism part of the flocked spring inner and outer diameter friction testing device provided by the embodiment of the present invention. Detailed Embodiment

[0021] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the embodiments of the present invention, and should not be construed as a limitation of the present invention.

[0022] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present utility model and for simplification, 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. Therefore, it should not be construed as a limitation to the present utility model.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0024] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0025] In an embodiment of the flocked spring inner and outer diameter friction testing device of the present utility model, the flocked spring inner and outer diameter friction testing device is used to detect and analyze the friction coefficients of the inner and outer surfaces of the spring after flocking, and adjust the flocking parameters according to the detected data, such as the flocking glue, the material and length of the fluff, as well as the flocking density and the glue curing conditions, etc., so that the flocked spring can have an optimal friction coefficient and ensure the long-term use of the spring in the telescopic mechanism.

[0026] Specifically, please refer to Figures 1 to 3 ; In this embodiment, the flocked spring inner and outer diameter friction testing device includes a friction testing machine 100, and the friction testing machine 100 has two detection stations 110. The friction testing machine 100 is a conventional technique for detecting the friction coefficient, so its specific structure and detection method will not be elaborated in this embodiment. The flocked spring inner and outer diameter friction testing device further includes an inner friction detection mechanism 200 and an outer friction detection mechanism 300, which are respectively arranged at the bottoms of the two working positions of the friction testing machine 100.

[0027] Refer to Figure 1, the internal friction detection mechanism 200 includes a support base 210, a slide bar 220, and a clamping sleeve 230. Among them, the top side of the clamping sleeve 230 is connected to a detection station 110. The clamping sleeve 230 is used to clamp the outer diameter of the spring, and the spring is fixed by its outer diameter so that the spring is fixed within the clamping sleeve 230. Specifically, the clamping sleeve 230 includes a top plate 231 and a bottom plate 232. Arc grooves are provided on the bottom side of the top plate 231 and the top side of the bottom plate 232. After the top plate 231 and the bottom plate 232 are combined, a clamping hole 233 is formed to fix the spring within the clamping hole 233. Connection holes are provided on the top plate 231 and the bottom plate 232 and are connected to each other. Therefore, by passing a locking screw through the corresponding connection holes, the bottom plate 232 and the top plate 231 are fixed to clamp the outside of the spring. The support base 210 is provided on the moving table 120 of the friction testing machine 100. One end of the slide bar 220 is connected to the support base 210, and the other end passes through the spring within the clamping sleeve 230, and the upper surface of the inner diameter of the spring is supported on the slide bar 220. Specifically, when detecting the internal friction coefficient of the spring, the flocked spring can be clamped within the clamping sleeve 230, and the slide bar 220 passes through the inner diameter of the spring. Under the action of its own gravity such as the clamping sleeve 230 and the spring, the upper surface of the inner diameter of the spring is supported on the slide bar 220. The moving table 120 of the friction testing machine 100 drives the slide bar 220 to reciprocate continuously, so that the internal friction coefficient of the inner surface of the spring can be detected.

[0028] Refer to Figures 1 to 3, the external friction detection mechanism 300 includes a friction base plate 310, a support rod 320, and a clamping plate 330. The friction base plate 310 is disposed on the top of the moving table 120. The top side of the clamping plate 330 is connected to another detection station 110. The support rod 320 is disposed on the bottom side of the clamping plate 330 and forms a clamping position 301. When a spring is sleeved on the support rod 320, the top side of the spring is clamped at the clamping position 301, and the bottom of the spring is supported on the friction base plate 310. Connecting pins 302 are provided at both ends of the clamping plate 330. The connecting pins 302 connect the support rod 320, enabling the support rod 320 and the clamping plate 330 to clamp the spring. Specifically, the spring is first sleeved on the support rod 320, and the connecting pins 302 pass through the holes of the clamping plate 330 and are connected to the support rod 320, fixing the support rod 320 and the clamping plate 330 as an integral body and clamping and fixing the spring. When detecting the friction coefficient of the outer surface of the spring, the spring is sleeved on the support rod 320, and the support rod 320 is connected to the clamping plate 330, thereby fixing the spring. Under the action of the external friction detection mechanism 300 and the self-gravity of the spring, the lower surface of the spring is supported on the friction base plate 310, and the moving table 120 drives the friction base plate to reciprocate. Therefore, the friction coefficient of the outer surface of the spring can be detected by a friction testing machine. In addition, when the spring is clamped between the support rod 320 and the clamping plate 330, the spring can also slide between the clamping plate 330 and the support rod 320, and the two ends of the spring are limited by the connecting pins 302. When the friction base plate 310 reciprocates, the spring has slight compression and stretching, thereby imitating the friction in actual application, and there is also a slight relative movement between the inner ring of the spring and the support rod 320, thereby ensuring the authenticity of the detection.

[0029] Further, referring to Figure 1 , to increase the stability of the sliding rod 220, two support seats 210 are symmetrically arranged on the moving table 120, and both ends of the sliding rod 220 are respectively supported on the two support seats 210.

[0030] Even further, referring to Figure 1 , the support seat 210 is provided with a support hole 211, and the diameter of the support hole 211 is larger than the diameter of the sliding rod 220, facilitating the sliding rod 220 to be inserted into the support hole 211. A screw hole 212 is provided on the outer side of the support seat 210, and the screw hole 212 communicates with the support hole 211. A locking screw is provided in the screw hole 212 for locking the sliding rod 220 in the support hole 211.

[0031] Further, referring to Figure 1, the detection station 110 includes a vertical rod 111, a lifting block 112, a cross bar 113, a guide block 114 and a weight seat 115. The vertical rod 111 is provided on the main body of the friction testing machine 100. The lifting block 112 is sleeved on the vertical rod 111 in a vertically slidable manner. The cross bar 113 slidably passes through the lifting block 112. Therefore, the overall height of the detection station 110 can be adjusted by the lifting block 112. After adjustment, the lifting block 112 can be locked and fixed by a locking screw. The guide block 114 is provided at one end of the cross bar 113. The guide block 114 is provided with a through guide hole. The weight seat 115 slidably passes through the guide hole freely. A limiting portion 116 is provided at the top end of the weight seat 115 for being limited to the top side of the guide block 114. A connecting seat 117 is provided at the bottom end. The clamping plate 330 or the clamping sleeve 230 is connected to the bottom side of the connecting seat 117. A sleeve rod 118 extends upward from the top side of the limiting portion 116 for sleeving weights. In this embodiment, the internal friction detection mechanism 200 and the external friction detection mechanism 300 can freely apply pressure to the spring, and the pressure applied to the spring can be changed by adjusting the weights on the sleeve rod 118 to ensure the requirements of different tests.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flocking spring inner and outer diameter friction test device, comprising a friction tester, wherein the friction tester is provided with two detection stations, characterized in that: It also includes an internal friction detection mechanism and an external friction detection mechanism, and is respectively provided at the bottom ends of the two working positions of the friction tester; The internal friction detection mechanism includes a support seat, a slide bar and a clamping sleeve, the top side of the clamping sleeve is connected to one of the detection stations, and the clamping sleeve is used to clamp the outer diameter of the spring; the support seat is arranged on the moving table of the friction tester, one end of the slide bar is connected to the support seat, and the other end passes through the spring in the clamping sleeve, and the inner diameter upper surface of the spring is supported on the slide bar; The external friction detection mechanism includes a friction base plate, a support rod and a clamping plate. The friction base plate is arranged on the top of the movable platform. The top side of the clamping plate is connected to another detection station. The support rod is arranged on the bottom side of the clamping plate and forms a clamping position. When the spring is sleeved on the support rod, the clamping position clamps the top side of the spring, and the bottom of the spring is supported on the friction base plate.

2. The flocking spring inner and outer diameter friction testing device according to claim 1, characterized in that: The support bases are in two groups and are symmetrically arranged on the moving platform, and the two ends of the sliding rod are respectively supported on the two support bases.

3. The flocking spring inner and outer diameter friction testing device according to claim 2, characterized in that: A supporting hole is provided on the supporting seat, and the hole diameter of the supporting hole is larger than the diameter of the sliding rod; a screw hole is provided on the outer side of the supporting seat, and the screw hole is connected to the supporting hole. A locking screw is provided in the screw hole for locking the sliding rod in the supporting hole.

4. The flocking spring inner and outer diameter friction testing device according to any one of claims 1 to 3, characterized in that: The clamping sleeve comprises a top plate and a bottom plate, arc grooves are arranged on the bottom side of the top plate and the top side of the bottom plate, and connecting holes connected to each other are arranged on the top plate and the bottom plate.

5. The flocking spring inner and outer diameter friction testing device according to claim 1, characterized in that: Connecting nails are provided at both ends of the clamping plate, and the connecting nails are connected to the supporting rod and used for limiting the two ends of the spring.

6. The flocking spring inner and outer diameter friction testing device according to claim 1, characterized in that: The detection station includes a vertical pole, a lifting block, a cross bar, a guide block and a weight seat; the vertical pole is arranged on the main body of the friction testing machine, the lifting block can be slidably mounted on the vertical pole, and the cross bar can slidably pass through the lifting block; the guide block is arranged at one end of the cross bar, the guide block is provided with a guide hole that passes through the upper and lower parts, the weight seat can freely slide through the guide hole, the top end of the weight seat is provided with a limiting part for limiting the top side of the guide block, the bottom end is provided with a connecting seat, the splint or the clamping sleeve is connected to the bottom side of the connecting seat; the top side of the limiting part is also extended upward with a sleeve rod for sleeve-mounting the weight.

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