Tensile detection device for polyurethane synchronous belt

Abstract

The utility model discloses a stretching detection device of a polyurethane synchronous belt, relates to the field of stretching detection devices, and aims to solve the technical problems that in the prior art, when a stretching detection device works, the two ends of the polyurethane synchronous belt are large in tensile force, and the polyurethane synchronous belt is easy to fall off when fixed under the large tensile force in a clamping manner, so that the stretching detection device is inconvenient to use. And the detection of the polyurethane synchronous belt is influenced. A C-shaped supporting frame is fixedly connected to the upper end of the bottom plate, guide rods are fixedly connected between the front ends and the rear ends of the two sides of the middle of the upper end of the bottom plate and the upper end face of the inner side of the C-shaped supporting frame, synchronous belt fixing mechanisms are movably connected to the upper ends and the lower ends of the middles of the four guide rods, and each synchronous belt fixing mechanism comprises a movable plate and a hook-shaped fixing piece. Hook-shaped fixing pieces are fixedly connected to the two sides of the upper middle portion of the movable plate, and a pull rod is connected between the two hook-shaped fixing pieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tensile testing device, concretely to a tensile testing device of polyurethane synchronous belt. BACKGROUND

[0002] The polyurethane synchronous belt is made of imported thermoplastic polyurethane material, has high wear resistance, various types of steel wire core ensure that it still maintains good movement ability in transmission, and has small production tolerance. In the production process, a layer of nylon is added to the tooth surface and / or tooth back to ensure that the running particularity in special applications remains unchanged, and a layer of polyurethane can also be added to the back of the belt to prevent corrosion or high load. The polyurethane synchronous belt needs to be detected by the tensile testing device after production.

[0003] For example, the authorized announcement number CN215677909U discloses a tensile testing device of polyurethane synchronous belt, which comprises two connecting plates, the upper side walls of the two connecting plates are fixedly connected with the same fixed plate, the upper side walls of the fixed plate are fixedly connected with two placing plates symmetrically, the side walls between the two placing plates are fixedly connected with the same first connecting frame, the right side of the first connecting frame is provided with a second connecting frame, the upper side walls of the first connecting frame and the second connecting frame are fixedly connected with a limiting cylinder, a limiting rod is inserted into the limiting cylinder, and the upper side walls of the first connecting frame and the second connecting frame are provided with limiting holes matched with the limiting rod. The utility model can conveniently and quickly install the polyurethane synchronous belt without using external tools when fixing the polyurethane synchronous belt, thereby improving the working efficiency of the detection device.

[0004] The existing tensile testing device is fixed by clamping both ends of the polyurethane synchronous belt, but due to the large tension of both ends of the polyurethane synchronous belt during the operation of the tensile testing device, the clamping method is easy to fall off under the condition of large tension, which affects the detection of the polyurethane synchronous belt. Therefore, there is an urgent need to develop a tensile testing device of polyurethane synchronous belt to help people solve the existing problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a tensile testing device of polyurethane synchronous belt to solve the problem of the above background technology that the tensile testing device is easy to fall off under the condition of large tension when fixing both ends of the polyurethane synchronous belt, which affects the detection of the polyurethane synchronous belt.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of polyurethane synchronous belt's tensile testing device, including bottom plate, the bottom plate upper end is fixedly connected with C-shaped support frame, the front and rear ends of the both sides of the middle part of the bottom plate upper end are fixedly connected with guide rod between C-shaped support frame inner side upper end face, the upper and lower ends of the middle part of four guide rods are movably connected with synchronous belt fixing mechanism, the synchronous belt fixing mechanism includes movable plate and hook fixing piece, the both sides of the middle part of movable plate are fixedly connected with hook fixing piece, pull rod is connected between two hook fixing pieces, buffer cylinder is fixedly connected in the middle part of bottom plate upper end, buffer cylinder is internally provided with telescopic rod, the upper end of telescopic rod extends out buffer cylinder upper end and is fixedly connected with the lower end of movable plate on the lower end synchronous belt fixing mechanism, after the upper end of telescopic rod extends out buffer cylinder upper end, tension sensor is fixedly arranged, C-shaped support frame upper end middle part is fixedly provided with hydraulic rod.

[0007] Preferably, the two synchronous belt fixing mechanisms are mirror image arranged.

[0008] Preferably, the front and rear ends of the both sides of the middle part of the movable plate are fixedly connected with guide tube, and the four guide tubes in the movable plate are respectively passed through the interiors of the four guide tubes.

[0009] Preferably, the hook fixing piece is provided with an oblique slot, and the both ends of the pull rod are respectively extended to the outer side of the hook fixing piece through the two oblique slots and are fixedly connected with limiting sheets.

[0010] Preferably, the lower end of the telescopic rod is extended to the lower end inside the buffer cylinder and is fixedly connected with a round plate.

[0011] Preferably, a spring is arranged between the lower end outside the telescopic rod and the upper end inside the buffer cylinder.

[0012] Preferably, the lower telescopic end of the hydraulic rod is extended to the lower end through the C-shaped support frame and is fixedly connected with the upper end of the movable plate of the upper end synchronous belt fixing mechanism.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、In the utility model, by adopting the cooperation design of hook fixing piece and pull rod, the quick and stable connection of the two ends of polyurethane synchronous belt is realized. This connection mode not only is simple to operate, and does not need to use additional fixing tool, but also can ensure that polyurethane synchronous belt is not easy to fall off in the tensile detection process, thereby improving the accuracy and reliability of detection.

[0015] 2. The utility model discloses, through setting the buffer cylinder and spring below the lower end synchronous belt fixing mechanism, effectively buffered the impact force produced in the stretching process, protected the tension inductor from being damaged. Meanwhile, the elastic action of spring can also make the tension inductor more accurately measure the actual stress condition of polyurethane synchronous belt in the stretching process, further improve the precision of detection.

[0016] 3. The utility model discloses, through the setting of guide pipe, four guide rods respectively pass four guide pipes inside on movable plate, make two synchronous belt fixing mechanisms when ascending and descending on four guide rods through guide pipe along guide rod sliding to movable plate and guide, guarantee the stability of whole synchronous belt fixing mechanism ascending and descending. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view of a polyurethane synchronous belt's tensile detection device of the utility model;

[0018] Figure 2 It is the main sectional view of the utility model;

[0019] Figure 3 It is the side sectional view of the utility model;

[0020] Figure 4 It is the A detailed enlarged view of the utility model.

[0021] In the drawing: 1, bottom plate;101, C type support frame;102, guide rod;2, synchronous belt fixing mechanism;201, movable plate;202, guide pipe;3, hook fixing piece;301, oblique slot;4, pull rod;401, limit sheet;5, buffer cylinder;501, telescopic link;502, round plate;503, spring;504, tension inductor;6, hydraulic rod. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Please refer to Figures 1-4The utility model provides an embodiment: a kind of polyurethane synchronous belt's tensile testing device, including bottom plate 1, the upper end of bottom plate 1 is fixedly connected with C type support frame 101, the front and rear ends of the upper end middle part both sides of bottom plate 1 are fixedly connected with guide rod 102 between C type support frame 101 inner side upper end face, the upper and lower ends of the middle part of four guide rods 102 are movably connected with synchronous belt fixing mechanism 2, two synchronous belt fixing mechanism 2 are mirror image arrangement, synchronous belt fixing mechanism 2 includes movable plate 201 and hook fixing piece 3, the upper middle part both sides of movable plate 201 are fixedly connected with hook fixing piece 3, two hook fixing pieces 3 are connected with pull rod 4, the front and rear ends of the upper middle part both sides of movable plate 201 are fixedly connected with guide pipe 202, four guide rods 102 respectively pass through four guide pipes 202 inside on movable plate 201, so that two synchronous belt fixing mechanism 2 is guided to movable plate 201 when being lifted on four guide rods 102 by guide pipe 202 along guide rod 102 sliding, guarantee the stability of the synchronous belt fixing mechanism 2 lifting, hook fixing piece 3 is provided with oblique slot 301, pull rod 4 two ends respectively pass through two oblique slots 301 and extend to the outside of hook fixing piece 3 and are fixedly connected with limiting sheet 401, two hook fixing pieces 3 can be made by pull rod 4 from sliding out, after pull rod 4 is inserted into two hook fixing pieces 3, the horizontal movement of pull rod 4 is limited by two limiting sheets 401, by taking out two pull rod 4 simultaneously, after polyurethane synchronous belt is simultaneously sleeved in the middle part of two pull rod 4, two pull rod 4 are inserted into the hook fixing piece 3 of two synchronous belt fixing mechanism 2 respectively, so that two synchronous belt fixing mechanism 2 simultaneously fixes the upper and lower ends of polyurethane synchronous belt.

[0024] Please refer to Figures 2-4The bottom plate 1 is fixedly connected with a buffer cylinder 5 at the middle of the upper end, the buffer cylinder 5 is internally provided with an extension rod 501, the upper end of the extension rod 501 extends out of the upper end of the buffer cylinder 5 and is fixedly connected with the lower end of the movable plate 201 of the lower end synchronous belt fixing mechanism 2, the upper end of the extension rod 501 is fixedly provided with a tension sensor 504 after extending out of the upper end of the buffer cylinder 5, the lower end of the extension rod 501 extends to the lower end inside the buffer cylinder 5 and is fixedly connected with a circular plate 502, the lower end outside the extension rod 501 is provided with a spring 503 between the upper end of the circular plate 502 and the upper end inside the buffer cylinder 5, the upper end synchronous belt fixing mechanism 2 is used to lift, and then the polyurethane synchronous belt is used to pull the lower end synchronous belt fixing mechanism 2 to lift, so that the lower end synchronous belt fixing mechanism 2 is pulled to extend the extension rod 501 upward when lifting, the lower end of the extension rod 501 drives the circular plate 502 to lift inside the buffer cylinder 5 and compresses the spring 503, the spring 503 is contracted to buffer the tension received by the tension sensor 504 on the extension rod 501, prevent the direct force from being too large to damage the tension sensor 504, the tension sensor 504 is used to gradually detect the tension of the extension rod 501 at the upper and lower ends, the recorded tension is subtracted from the gravity of the lower end synchronous belt fixing mechanism 2, and the resistance capacity value of the polyurethane synchronous belt can be obtained, and the distance between the two synchronous belt fixing mechanisms 2 after the polyurethane synchronous belt is stretched is subtracted from the distance before stretching, and the stretching performance of the polyurethane synchronous belt can be obtained.

[0025] Please refer to Figures 1-3 The C-shaped support frame 101 is fixedly provided with a hydraulic rod 6 at the middle of the upper end, the lower end of the hydraulic rod 6 extends to the lower end through the C-shaped support frame 101 and is fixedly connected with the upper end of the movable plate 201 of the upper end synchronous belt fixing mechanism 2, and the upper end synchronous belt fixing mechanism 2 is lifted by the hydraulic rod 6.

[0026] Working principle: in use, first, the polyurethane synchronous belt two ends are respectively sleeved in the middle of two pull rods 4, then two pull rods 4 are respectively inserted into the oblique insertion slot 301 on the hook-shaped fixing piece 3 of two synchronous belt fixing mechanisms 2, and the pull rod 4 is limited and fixed through the limiting sheet 401, so that the two ends of the polyurethane synchronous belt are stably connected. Then, the hydraulic rod 6 is started, the telescopic end of the hydraulic rod 6 pushes the upper end synchronous belt fixing mechanism 2 to move upwards along the guide rod 102, because the two ends of the polyurethane synchronous belt are fixed by the synchronous belt fixing mechanism 2, so the rising of the upper end synchronous belt fixing mechanism 2 drives the polyurethane synchronous belt and the lower end synchronous belt fixing mechanism 2 to rise together. In the process of the rising of the lower end synchronous belt fixing mechanism 2, the telescopic rod 501 at the lower end will extend upwards to the buffer cylinder 5 with the rising of the movable plate 201, and the round plate 502 at the lower end of the telescopic rod 501 will compress the spring 503, and the contraction of the spring 503 buffers the tension of the telescopic rod 501. The tension sensor 504 detects the tension of the telescopic rod 501 in real time, and records the tension data. Because the lower end synchronous belt fixing mechanism 2 itself has a certain gravity, when calculating the resistance of the polyurethane synchronous belt, the gravity of the lower end synchronous belt fixing mechanism 2 needs to be subtracted from the recorded tension data. At the same time, by measuring the distance difference between the two synchronous belt fixing mechanisms 2 after the polyurethane synchronous belt is stretched and the distance before the polyurethane synchronous belt is stretched, the stretching performance of the polyurethane synchronous belt can be calculated. The whole detection process is simple to operate, without using additional fixing tools, and through the buffering effect of the spring 503, the tension sensor 504 is effectively protected, and the accuracy and safety of the detection are improved.

[0027] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes falling within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A tensile testing device for polyurethane timing belts, comprising a base plate (1), characterized in that: The upper end of the bottom plate (1) is fixedly connected with a C-shaped support frame (101), the front and rear ends on both sides of the upper middle part of the bottom plate (1) are fixedly connected with guide rods (102) between the inner side upper end faces of the C-shaped support frame (101), the upper and lower ends of the middle parts of the four guide rods (102) are movably connected with synchronous belt fixing mechanisms (2), the synchronous belt fixing mechanism (2) comprises an activity plate (201) and a hook-shaped fixing part (3), the hook-shaped fixing part (3) is fixedly connected to the upper middle part of the activity plate (201) on both sides, a pull rod (4) is connected between the two hook-shaped fixing parts (3), a buffer cylinder (5) is fixedly connected to the upper middle part of the bottom plate (1), a telescopic rod (501) is arranged in the buffer cylinder (5), the upper end of the telescopic rod (501) extends out of the upper end of the buffer cylinder (5) and is fixedly connected with the lower end of the activity plate (201) on the lower synchronous belt fixing mechanism (2), a tension sensor (504) is fixedly arranged on the upper end of the telescopic rod (501) extending out of the upper end of the buffer cylinder (5), and a hydraulic rod (6) is fixedly arranged at the upper middle part of the C-shaped support frame (101).

2. The tensile testing device for polyurethane synchronous belts according to claim 1, characterized in that: The two synchronous belt fixing mechanisms (2) are mirror image arranged.

3. The tensile testing device for polyurethane synchronous belts according to claim 1, characterized in that: The front and rear ends on both sides of the middle part of the activity plate (201) are fixedly connected with guide tubes (202), and the four guide rods (102) respectively pass through the interiors of the four guide tubes (202) on the activity plate (201).

4. The tensile testing device for polyurethane synchronous belts according to claim 1, characterized in that: The hook-shaped fixing part (3) is provided with an inclined slot (301), and the pull rod (4) extends to the outside of the hook-shaped fixing part (3) through the two inclined slots (301) and is fixedly connected with a limiting sheet (401).

5. The tensile testing apparatus for polyurethane synchronous belts according to claim 1, characterized in that: The lower end of the telescopic rod (501) extends to the lower end inside the buffer cylinder (5) and is fixedly connected with a circular plate (502).

6. The tensile testing apparatus for polyurethane synchronous belts according to claim 5, characterized in that: A spring (503) is arranged between the lower end outside the telescopic rod (501) and the upper end inside the buffer cylinder (5) on the upper end of the circular plate (502).

7. The apparatus according to claim 1, wherein: The telescopic end of the lower end of the hydraulic rod (6) extends to the lower end through the C-shaped support frame (101) and is fixedly connected with the upper end of the activity plate (201) of the upper synchronous belt fixing mechanism (2).

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