Tensile detection device for polyurethane synchronous belt

Abstract

The utility model discloses a tensile detection device for a polyurethane synchronous belt, which belongs to the technical field of tensile detection devices, and comprises a tensile detection testing machine, a tension detection device, a tension detection device, a tension detection device, a tension detection device, a tension detection device, a tension detection device and a tension detection device, wherein the tension detection device comprises a tension testing machine table, a fixed frame beam, a tension arm and a sample clamp; the fixed plate is arranged on the tension testing machine table, and guide rails which are symmetrically distributed and sliding blocks which are connected with the guide rails in a sliding manner are arranged on the surface of the fixed plate; the adjusting assembly comprises a moving plate, a fixed block, a stabilizing plate and a pressing piece, the two ends of the moving plate are connected with the sliding blocks respectively, the outer side of the moving plate is sleeved with the fixed block in a sliding mode, the stabilizing plate is connected with the moving plate, and the pressing piece comprises a pressing rod penetrating through the moving plate and the fixed block; the testing machine is provided with a placement design for limiting the position of a sample, the sample is placed in the limiting plate and limited by the limiting plate and the flat clamping plate, so that the sample is accurately mounted, the positions of the fixed block and the limiting plate can be moved, and the influence of the limiting plate on the stretched sample in the sample stretching process is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of stretching detection devices, and in particular relates to a stretching detection device for a polyurethane synchronous belt. Background Art

[0002] Polyurethane timing belt is a transmission belt made of imported thermoplastic polyurethane material with high wear resistance. Various types of steel wire cores are usually embedded inside. In addition, a thick layer of polyurethane may be added on the back of the belt to prevent corrosion or withstand high loads. In order to ensure that the quality and performance of the produced polyurethane timing belt are within the qualified standard range, a tensile testing machine is required to perform tensile strength and elongation tests on the polyurethane timing belt to ensure that it can withstand the predetermined tensile load and maintain its shape and performance.

[0003] The steps of testing polyurethane synchronous belts with a tensile testing machine are as follows: first, select a polyurethane synchronous belt sample that meets the requirements, then fix the two ends of the sample with opposing clamps, and adjust the position of the sample to ensure that the axis of the sample is consistent with the stretching direction. Then start the testing machine and apply tension to the sample at a specified stretching rate until the sample breaks. The process of testing the tensile performance of polyurethane synchronous belts with a tensile testing machine is a conventional technology. During the above test process, the testing machine will automatically record the data of tension and elongation of the sample. When the tensile testing machine is testing, the sample is in a suspended state, and the two ends of the suspended sample are clamped and fixed by clamps. During the whole process, there is no design to limit the sample on the testing machine, and it cannot ensure that the axis of the sample is consistent with the stretching direction. The position of the sample needs to be adjusted frequently to avoid it being in a skewed state, and the placement of the sample is more cumbersome.

[0004] When the existing testing machine tests the tensile performance of the polyurethane synchronous belt, there is a problem that there is no placement design that limits the sample position on the testing machine. Therefore, the present application proposes a tensile testing device for the polyurethane synchronous belt. Utility Model Content

[0005] The utility model aims to provide a tensile testing device for a polyurethane synchronous belt, so as to solve the problem of the placement design of the sample position not being limited on the testing machine proposed in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a stretch detection device for a polyurethane synchronous belt, comprising:

[0007] A tensile testing machine, comprising a tensile testing machine table, a fixed frame beam, a tensile arm mounted between opposite surfaces of the fixed frame beam, and a sample fixture;

[0008] A fixed plate installed on the tensile testing machine, the surface of which is provided with symmetrically distributed guide rails and sliders slidably connected to the guide rails;

[0009] The adjusting component comprises a moving plate connected to the slider at both ends, a fixed block slidably sleeved on the outside of the moving plate, a stabilizing plate connected to the moving plate, and a pressing piece, wherein the pressing piece comprises a pressing rod penetrating the moving plate and the fixed block, a fixing rod vertically connected to the stabilizing plate by screw threading and one end of which is embedded in the pressing rod, and a compression spring slidably sleeved on the outside of the fixing rod, wherein symmetrically distributed clamping blocks are arranged on the outer surface of one end of the pressing rod, the stabilizing plate is a "U"-shaped structure, and clamping grooves corresponding to the clamping blocks are arranged on the opposite inner surfaces of the stabilizing plate, and the pressing rod moves along the axial direction of the vertical fixing plate;

[0010] The limiting assembly includes a limiting plate connected to the outer surface of the fixed block, a fixing cylinder perpendicular to the outer surface of the limiting plate, an adjusting screw passing through the fixing cylinder and the limiting plate, and a flat clamping plate connected to one end of the adjusting screw, wherein the flat clamping plate moves horizontally along the axial direction of the adjusting screw, and the limiting plate is a "U"-shaped structure, and the axial direction of the adjusting screw is parallel to the fixing plate.

[0011] Preferably, the movable plate is provided with symmetrically distributed spring plates, a connecting plate is provided between the ends of adjacent spring plates, and a handle is provided on the connecting plate.

[0012] Preferably, a non-slip pad that matches the surface of the fixed plate is provided on the surface of the connecting plate, and the connecting plate and the non-slip pad are both rectangular strip structures.

[0013] Preferably, the clamping block is a rectangular strip structure, the clamping slot is a rectangular shape, and the pressing rod is provided with a circular ring b for clamping the fixing block.

[0014] Preferably, the bottom end of the fixing plate connected to the tensile testing machine is a right-angle structure, and the distance between the fixing plate and the fixing block is a spacing H.

[0015] Preferably, the surfaces of the limiting plate and the flattening clamping plate on the same side are flush, and the adjusting screw is screwed together with the fixing tube and the limiting plate through threads.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] In the utility model, the testing machine is provided with a placement design for limiting the position of the sample B. The sample B is placed in a limiting plate. The sample B is limited by the limiting plate and the flat clamping plate so that it can be accurately installed. The positions of the movable fixing block and the limiting plate can be prevented from affecting the stretched sample B by the limiting plate during the stretching process of the sample B. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 For the utility model Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 3 It is a side view structural schematic diagram of the fixing block and the stabilizing plate of the utility model;

[0021] Figure 4 For the utility model Figure 2 Schematic diagram of the structure of the CC direction of the middle limit plate;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the stabilizing plate of the utility model;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the fixing block of the utility model;

[0024] In the figure: 2, fixed plate; 3, movable plate; 5, fixed block; 6, stabilizing plate; 11, tensile testing machine; 12, fixed frame beam; 13, tension arm; 14, sample fixture; 21, guide rail; 22, slider; 31, spring plate; 32, connecting plate; 41, limiting plate; 42, fixed cylinder; 43, adjusting screw; 44, leveling clamp; 51, pressing rod; 52, fixing rod; 53, compression spring; 61, slot; 321, anti-slip pad; 511, block; B, sample; b, ring. DETAILED DESCRIPTION

[0025] 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. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 6The utility model provides a technical solution: a tensile testing device for a polyurethane synchronous belt, comprising: a tensile testing machine, comprising a tensile testing machine platform 11, a fixed frame beam 12, a tension arm 13 and a sample clamp 14 installed between opposite surfaces of the fixed frame beam 12, the two ends of a standard sample B of a polyurethane synchronous belt material are fixed by the sample clamp 14, and then the switch button on the tensile testing machine platform 11 is started, and the tension arm 13 moves vertically, so that the sample B is in a tensile state, until it finally breaks, so as to achieve the purpose of testing the tensile performance of the sample B. The experimental process and experimental principle are conventional technologies, and this application will not be described in detail; a fixed plate 2 installed on the tensile testing machine platform 11, and the surface of the fixed plate 2 is provided with The guide rails 21 are symmetrically distributed, and the sliders 22 are slidably connected to the guide rails 21. The fixed plate 2 is fixed to the tensile test machine 11 and the guide rails 21 by screws. The slider 22 slides along the length direction of the guide rails 21 to change the positions of the slider 22 and the movable plate 3. The adjustment component includes a movable plate 3 connected to the slider 22 at both ends, a fixed block 5 sleeved on the outside of the movable plate 3, a stabilizing plate 6 connected to the movable plate 3, and a pressing member. The movable plate 3 is fixed to the slider 22 by screws, the movable plate 3 is fixed to the stabilizing plate 6 by screws, the fixed block 5 is slidably connected to the movable plate 3, and the pressing member includes a pressing rod 51 that passes through the movable plate 3 and the fixed block 5, and is vertically connected to the stabilizing plate 6 by threaded engagement and one end of which is embedded in the pressing rod 5 1, a compression spring 53 is slidably sleeved on the outside of the fixing rod 52, a symmetrically distributed block 511 is provided on the outer surface of one end of the pressing rod 51, the stabilizing plate 6 is a "U"-shaped structure, and a slot 61 corresponding to the block 511 is provided on the opposite inner surface of the stabilizing plate 6. The pressing rod 51 moves along the axial direction of the vertical fixing plate 2, and the block 511 and the pressing rod 51 are fixedly connected. The pressing rod 51 is rotated to make the block 511 leave the slot 61, and a pressing force is applied to the pressing rod 51. The pressing rod 51 drives the fixing block 5 to move, and the pressing rod 51 squeezes the compression spring 53 to a suitable position, and then rotates again to make the block 511 embed into the slot 61, and the pressing rod 51 is limited, which can change the fixed block 5. The positions of the fixed block 5 and the limiting plate 41; the limiting component includes a limiting plate 41 connected to the outer surface of the fixed block 5, a fixed cylinder 42 perpendicular to the outer surface of the limiting plate 41, an adjusting screw 43 passing through the fixed cylinder 42 and the limiting plate 41, and a flat clamping plate 44 connected to one end of the adjusting screw 43. The limiting plate 41 is a "U"-shaped structure. The axial direction of the adjusting screw 43 is parallel to the fixed plate 2. The flat clamping plate 44 moves horizontally along the axial direction of the adjusting screw 43. The fixed block 5 and the limiting plate 41 are fixed by screws, and the fixed cylinder 42 and the limiting plate 41 are fixedly connected. The adjusting screw 43 rotates, and the adjusting screw 43 moves against the flat clamping plate 44, which can limit the sample B placed inside the limiting plate 41 to make it stable.

[0027] In this embodiment, the movable plate 3 is provided with symmetrically distributed spring plates 31, and a connecting plate 32 is provided between the ends of adjacent spring plates 31. The spring plate 31 is fixedly connected to the movable plate 3 and the connecting plate 32 by screws. A handle is provided on the connecting plate 32. By pulling the connecting plate 32 with the handle, the distance between the connecting plate 32 and the fixed plate 2 can be changed. The spring plate 31 is made of elastic metal material and can be reset. An anti-skid pad 321 that matches the surface of the fixed plate 2 is provided on the surface of the connecting plate 32. Both the connecting plate 32 and the anti-skid pad 321 are rectangular strip structures. The anti-skid pad 321 is bonded to the connecting plate 32 by glue. The anti-skid pad 321 fits the surface of the fixed plate 2 to increase friction and prevent the movable plate 3 from shaking.

[0028] In this embodiment, the card block 511 is a rectangular strip structure, the card slot 61 is a rectangular shape, and the card block 511 is embedded in the card slot 61 to achieve the effect of limiting the card block 511 and the pressing rod 51. The pressing rod 51 is provided with a circular ring b that clamps the fixed block 5. When the pressing rod 51 is pressed, the circular ring b drives the fixed block 5 to move.

[0029] In this embodiment, the bottom end of the fixed plate 2 connected to the tensile testing machine 11 is a right-angle structure, the fixed plate 2 and the tensile testing machine 11 are fixed by screws, and the distance between the fixed plate 2 and the fixed block 5 is a spacing H. By pressing the pressing rod 51, the distance of the spacing H can be changed.

[0030] In this embodiment, the surfaces on the same side of the limiting plate 41 and the leveling clamp plate 44 are flush, the adjusting screw 43 is connected to the fixing tube 42 and the limiting plate 41 by threaded engagement, the distance between the opposite surfaces of the leveling clamp plate 44 and the limiting plate 41 is the spacing F, the sample B is placed in the limiting plate 41, the sample B is limited by the limiting plate 41 and the leveling clamp plate 44, the adjusting screw 43 is rotated, the leveling clamp plate 44 moves, and then the size of the spacing F is changed, which can be suitable for samples B of different widths.

[0031] The working principle and use process of this utility model:

[0032] 1. When installing and fixing the sample B, pull the connecting plate 32 by the handle to change the distance between the connecting plate 32 and the fixed plate 2, and move the connecting plate 32, the spring plate 31 and the movable plate 3 to a suitable position along the horizontal direction of the guide rail 21;

[0033] Second, loosen the connecting plate 32, the elastic connecting plate 32 is reset, the anti-skid pad 321 is in contact with the surface of the fixed plate 2, the friction is increased, and the movable plate 3 is prevented from shaking. The pressing rod 51 is rotated to make the rectangular block 511 leave the rectangular slot 61 on the inner surface of the "U"-shaped stabilizing plate 6. Under the elastic force of the compression spring 53 in the initial compressed state, the pressing rod 51 moves outward. Due to the effect of the ring b, the pressing rod 51 drives the fixed block 5 and the limiting plate 41 to move to a suitable position, and then rotates in the opposite direction, so that the block 511 is embedded in the slot 61, and the fixed block 5 and the limiting plate 41 remain stable.

[0034] 3. Rotate the adjusting screw 43 to move the leveling clamp 44 outward, so that the distance F between the leveling clamp 44 and the limiting plate 41 is slightly larger than the width of the sample B, so as to facilitate the placement of the sample B;

[0035] Fourth, the sample B is placed in the limiting plate 41, and one side surface of the sample B is in contact with the inner side wall of the limiting plate 41. One side of the sample B is limited by the limiting plate 41. The bonding surface between the sample B and the limiting plate 41 is rectangular, and the contact surface is large, which can support the sample B and prevent the sample B from shaking.

[0036] Fifth, the adjusting screw 43 is rotated in the opposite direction to move the flat clamping plate 44 inward along the direction a. The flat clamping plate 44 defines the other side of the sample B. At this time, the sample B is defined by the defining plate 41 and the flat clamping plate 44, so that the installation is accurate and stable, and the sample B is prevented from being in a skewed suspended state. By rotating the adjusting screw 43, the position of the flat clamping plate 44 is adjusted, which has the effect of adjusting the size of the spacing F on one side, so as to be suitable for samples B of different widths;

[0037] 6. After the sample B is placed stably in the limiting plate 41, the top and bottom ends of the sample B are fixed by the sample fixture 14;

[0038] 7. Rotate the adjusting screw 43 again to move the leveling clamp 44 outward, so that the distance F between the leveling clamp 44 and the limiting plate 41 is slightly larger than the width of the sample B, so as to facilitate the loosening between the limiting plate 41 and the leveling clamp 44 and the sample B;

[0039] 8. Rotate the pressing rod 51 to make the rectangular block 511 leave the rectangular slot 61 on the inner surface of the "U"-shaped stabilizing plate 6, so that the pressing rod 51 can slide after being pressed;

[0040] 9. Apply a pressing force to the rotating and sliding pressing rod 51, so that the pressing rod 51 drives the fixed block 5 and the limiting plate 41 to move. After the pressing rod 51 squeezes the compression spring 53 to a suitable position, it rotates in the opposite direction to make the clamping block 511 fit into the clamping groove 61. Under the elastic force of the compression spring 53, the clamping block 511 at one end of the pressing rod 51 is tightly attached to the stabilizing plate 6. At this time, the size of the spacing H is changed, so that there is a spacing between the limiting plate 41 and the sample B, so as to avoid friction between the limiting plate 41 and the sample B during the tensile test of the sample B, thereby affecting the test effect of the sample B.

[0041] In summary: the testing machine is provided with a placement design for limiting the position of sample B, and sample B is placed in a limiting plate 41. Sample B is limited by the limiting plate 41 and the flat clamping plate 44, so that it is accurately installed. The positions of the movable fixing block 5 and the limiting plate 41 are prevented from being affected by the limiting plate 41 on the stretched sample B during the stretching process of sample B.

[0042] Although the embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensile testing device for a polyurethane synchronous belt, characterized in that: include: A tensile testing machine, comprising a tensile testing machine platform (11), a fixed frame beam (12), a tensile arm (13) installed between opposite surfaces of the fixed frame beam (12), and a sample fixture (14); A fixed plate (2) mounted on a tensile testing machine platform (11), wherein a surface of the fixed plate (2) is provided with symmetrically distributed guide rails (21) and a sliding block (22) slidably connected to the guide rails (21); The adjusting component comprises a movable plate (3) whose two ends are respectively connected to a slider (22), a fixed block (5) slidably mounted on the outside of the movable plate (3), a stabilizing plate (6) connected to the movable plate (3), and a pressing member, wherein the pressing member comprises a pressing rod (51) penetrating the movable plate (3) and the fixed block (5), a fixed rod (52) vertically connected to the stabilizing plate (6) by screw threading and one end of which is embedded in the pressing rod (51), and a compression spring (53) slidably mounted on the outside of the fixed rod (52), wherein the outer surface of one end of the pressing rod (51) is provided with symmetrically distributed clamping blocks (511), the stabilizing plate (6) is a "U"-shaped structure, and the opposite inner surface of the stabilizing plate (6) is provided with a clamping groove (61) corresponding to the clamping block (511), and the pressing rod (51) moves along the axial direction of the vertical fixed plate (2); The limiting assembly comprises a limiting plate (41) connected to the outer surface of the fixing block (5), a fixing tube (42) perpendicular to the outer surface of the limiting plate (41), an adjusting screw (43) penetrating the fixing tube (42) and the limiting plate (41), and a flat clamping plate (44) connected to one end of the adjusting screw (43), wherein the flat clamping plate (44) moves horizontally along the axial direction of the adjusting screw (43), and the limiting plate (41) is a "U"-shaped structure, and the axial direction of the adjusting screw (43) is parallel to the fixing plate (2).

2. The stretch detection device for a polyurethane synchronous belt according to claim 1, characterized in that: The movable plate (3) is provided with symmetrically distributed spring plates (31), and a connecting plate (32) is provided between the ends of adjacent spring plates (31), and a handle is provided on the connecting plate (32).

3. The stretch detection device for a polyurethane synchronous belt according to claim 2, characterized in that: An anti-skid pad (321) that matches the surface of the fixing plate (2) is provided on the surface of the connecting plate (32); the connecting plate (32) and the anti-skid pad (321) are both rectangular strip structures.

4. The stretch detection device for a polyurethane synchronous belt according to claim 1, characterized in that: The clamping block (511) is a rectangular strip structure, the clamping slot (61) is a rectangular shape, and the pressing rod (51) is provided with a circular ring (b) for clamping the fixing block (5).

5. The stretch detection device for a polyurethane synchronous belt according to claim 1, characterized in that: The bottom end of the fixed plate (2) connected to the tensile testing machine (11) is a right-angle structure, and the distance between the fixed plate (2) and the fixed block (5) is a spacing H.

6. The stretch detection device for a polyurethane synchronous belt according to claim 1, characterized in that: The surfaces of the limiting plate (41) and the flattening clamping plate (44) on the same side are flush, and the adjusting screw (43) is screwed together with the fixing cylinder (42) and the limiting plate (41) through threads.

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