Rubber tension testing device

Abstract

The utility model discloses a rubber tension testing device, which relates to the technical field of rubber tension detection, and comprises a bottom plate, a first fixing plate, a second fixing plate, a telescopic cylinder, a tension tester and a pair of clamps, the first fixing plate and the second fixing plate are respectively arranged on two sides of the upper surface of the bottom plate; the telescopic air cylinder is arranged on the first fixing plate, the telescopic end of the telescopic air cylinder penetrates to the inner side of the first fixing plate, and the tension tester is arranged on the inner side wall of the second fixing plate and is as high as the telescopic end of the telescopic air cylinder; the linear motor drives the push plate to tightly press the two ends of the rubber sheet at the bottom of the conveying roller, the rubber sheet is attached to the surface of the conveying roller, friction is generated on the rubber sheet during tension testing, all positions of the rubber sheet in the width direction are subjected to pressure and friction force, fixing is stable, the testing quality is improved, and the detection result is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to rubber tension test technical field, concretely is a rubber tension testing device. BACKGROUND

[0002] Rubber refers to the high elasticity polymer material with reversible deformation, which is elastic at room temperature, can produce larger deformation under the action of small external force, and can restore to the original state after removing the external force. Rubber belongs to completely amorphous polymer, which has low glass transition temperature and large molecular weight, more than several hundred thousand. Rubber is divided into natural rubber and synthetic rubber. Natural rubber is processed from the gum extracted from rubber trees, rubber grass and other plants. Synthetic rubber is obtained by polymerization of various monomers. Rubber products are widely used in industry and life.

[0003] Common rubber products are rubber ropes and rubber sheets. For rubber strip tension detection, the rubber strip is generally thin and small, so it is easy to fix. The fixture has no effect on the test results. However, for rubber sheet tension detection, the stability of the fixture affects the accuracy of the tension detection. The fixture for rubber sheet tension detection usually adopts a pair of clamping plates to press and clamp the two side edges of the rubber sheet. However, due to the uneven distribution of the elastic capacity of the rubber sheet clamping position and the uneven thickness distribution of the rubber sheet clamping position, the rubber sheet between the two clamping plates may be locally loose, the local fixation is not tight enough, and the stress is uneven during tension testing, which affects the test results. Local fixation may also cause the rubber sheet to fall off during testing, affecting the testing efficiency. UTILITY MODEL CONTENTS

[0004] In view of the above shortcomings of the prior art, the utility model provides a rubber tension testing device. The linear motor drives the push plate to press the two ends of the rubber sheet against the bottom of the conveying roller. The rubber sheet is attached to the surface of the conveying roller. During tension testing, the rubber sheet is subjected to friction. Each position of the rubber sheet in the width direction is subjected to pressure and friction. The fixation is stable, the testing quality is improved, and the detection result is more accurate.

[0005] To achieve the above object, the utility model discloses a rubber tension testing device, including bottom plate, first fixed plate, second fixed plate, telescopic cylinder, tension testing meter and a pair of clamp, first fixed plate and second fixed plate are arranged respectively on the both sides of bottom plate upper surface, telescopic cylinder sets up at first fixed plate, and telescopic cylinder's telescopic end penetrates to the inside of first fixed plate, tension testing meter sets up at the inner wall of second fixed plate and with the same height of telescopic end of telescopic cylinder, a pair of clamp symmetry design and set up respectively at the telescopic end of telescopic cylinder and tension testing meter, the clamp includes fixed block, half cylinder shell, conveyer roller, linear motor, push plate and with self locking function's rotating motor, the fixed block in a pair of clamp is fixedly connected with the telescopic end of telescopic cylinder and tension testing meter respectively, the shell is fixedly connected with fixed block, the conveyer roller rotation is arranged in the shell, and the conveyer roller surface and shell inner wall are between setting certain distance, the rotating motor sets up on the side wall of shell end face, and the rotating motor output end is connected with the shaft, the shaft penetrates the axis of conveyer roller and can drive conveyer roller rotation, the linear motor sets up at the bottom of shell outer side wall, and is fixedly connected with shell through mounting seat, and the linear motor telescopic end penetrates to the shell and is fixedly connected with push plate, and the linear motor can push the push plate and press the rubber sheet on the conveyer roller, and the telescopic cylinder, linear motor, rotating motor and tension testing meter correspond with external control system and computer connection.

[0006] Preferably, the first and second proximity sensors are connected to the external control system.

[0007] Preferably, the conveyer roller outer surface and the push plate inner wall are evenly provided with protrusions that can increase the friction between the rubber sheet.

[0008] Preferably, the shell inner wall is provided with a groove corresponding to the push plate position, and the push plate can stay in the groove.

[0009] Preferably, the push plate cross section shape is arc, and the push plate inner wall matches the conveyer roller surface.

[0010] The utility model provides a rubber tension testing device, has the following beneficial effects:

[0011] 1. The utility model discloses a linear motor drive push plate and press the both ends of rubber sheet in the bottom of conveyer roller, and rubber sheet is pasted on the surface of conveyer roller, and produces friction to rubber sheet when tension testing, and each position on the width of rubber sheet is subjected to pressure and friction, and is fixed stable, improves test quality, and the detection result is more accurate.

[0012] 2. The utility model discloses a first proximity sensor and a second proximity sensor are set respectively on the two sides of the inner side wall of the shell, and the conveying roller can drive the rubber sheet to rotate along with the rotation of the rotating motor, thereby winding on the surface of the conveying roller, automatic conveying, convenient control rubber sheet's position, high degree of automation, convenient personnel operation. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a kind of rubber tension testing device's front view cross section of the utility model;

[0014] Fig. 2 It is the main view schematic diagram of the utility model in clamp.

[0015] In the drawing: 1, rubber sheet;2, rotating shaft;3, protruding;4, conveying roller;5, first proximity sensor;6, fixed block;7, telescopic pneumatic cylinder;8, first fixed plate;9, shell;10, recess;11, push plate;12, linear motor;13, mounting seat;14, second proximity sensor;15, bottom plate;16, tension testing meter;17, second fixed plate;18, rotating motor. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination 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. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of the utility model protection.

[0017] As Figs. 1-2As shown, a rubber tension testing device includes a base plate 15, a first fixed plate 8, a second fixed plate 17, a telescopic cylinder 7, a tension testing meter 16 and a pair of clamps, the first fixed plate 8 and the second fixed plate 17 are respectively arranged on both sides of the upper surface of the base plate 15, the telescopic cylinder 7 is arranged on the first fixed plate 8, and the telescopic end of the telescopic cylinder 7 penetrates to the inner side of the first fixed plate 8, the tension testing meter 16 is arranged on the inner side wall of the second fixed plate 17 and has the same height as the telescopic end of the telescopic cylinder 7, a pair of clamps are symmetrically designed and respectively arranged on the telescopic end of the telescopic cylinder 7 and the tension testing meter 16, the clamp includes a fixed block 6, a semi-cylindrical shell 9, a conveying roller 4, a linear motor 12, a push plate 11 and a rotating motor 18 with self-locking function, the fixed block 6 in a pair of clamps is respectively fixedly connected with the telescopic end of the telescopic cylinder 7 and the tension testing meter 16, the shell 9 is fixedly connected with the fixed block 6, the conveying roller 4 is rotatably arranged in the shell 9, and a certain distance is set between the surface of the conveying roller 4 and the inner side wall of the shell 9, the rotating motor 18 is arranged on the side wall of the end face of the shell 9, and the output end of the rotating motor 18 is connected with a rotating shaft 2, the rotating shaft 2 penetrates the axis of the conveying roller 4 and can drive the conveying roller 4 to rotate, the linear motor 12 is arranged at the bottom of the outer side wall of the shell 9 and is fixedly connected with the shell 9 through a mounting seat 13, the telescopic end of the linear motor 12 penetrates the shell 9 and is fixedly connected with the push plate 11, and the linear motor 12 can push the push plate 11 to press the rubber sheet 1 on the conveying roller 4, the telescopic cylinder 7, the linear motor 12, the rotating motor 18 and the tension testing meter 16 are connected with an external control system and a computer; first and second proximity sensors 5 and 14 are respectively arranged on both sides of the inner side wall of the shell 9, the position of the first sensor is close to the side where the rubber sheet 1 enters, and the first and second proximity sensors 5 and 14 are connected with the external control system; a plurality of protrusions 3 capable of increasing the friction between the rubber sheet 1 are uniformly arranged on the outer surface of the conveying roller 4 and the inner side wall of the push plate 11; a groove 10 is arranged on the inner side wall of the shell 9 corresponding to the position of the push plate 11, and the push plate 11 can stay in the groove 10; the cross-sectional shape of the push plate 11 is arc-shaped, and the inner side wall of the push plate 11 matches the surface of the conveying roller 4.

[0018] The detailed connection means is a known technology in the art, and the working principle and process are mainly introduced as follows:

[0019] According to the description attached Figs. 1-2It can be known that, when the utility model is used, the two ends of the rubber sheet 1 are respectively inserted into the gap between the conveying roller 4 and the shell 9, the distance between the surface of the conveying roller 4 and the inner side wall of the shell 9 is designed according to the thickness of the rubber pad, and the distance is slightly larger than the thickness of the rubber pad, and those skilled in the art can understand it. After one end of the rubber sheet 1 is inserted, the rotating motor 18 is started, the output end of the rotating motor 18 drives the rotating shaft 2 and the conveying roller 4 to rotate, and the rotating direction of the conveying roller 4 is that the rubber sheet 1 can be conveyed to the inside of the gap between the shell 9 and the conveying roller 4, until the rubber sheet 1 is conveyed to above the push plate 11 and the rubber sheet 1 between the pair of conveying rollers 4 is as straight as possible, and the rotating motor 18 stops working. Since the rotating motor 18 has a self-locking function, the conveying roller 4 will not rotate, at this time, the linear motor 12 works to drive the push plate 11 to move upwards to press the rubber sheet 1 tightly at the bottom of the conveying roller 4, and the rubber sheet 1 is attached to the surface of the conveying roller 4. The extension air cylinder 7 works to pull the clamp on one side to move outward, and the tension testing meter 16 is used for tension testing. In the utility model, the two ends of the rubber sheet 1 are pressed tightly at the bottom of the conveying roller 4 by the push plate 11 driven by the linear motor 12, and the rubber sheet 1 is attached to the surface of the conveying roller 4. When tension testing, the rubber sheet 1 generates friction, and the rubber sheet 1 at each position in the width direction is subjected to pressure and friction, is fixed and stable, improves the testing quality, and the detection result is more accurate.

[0020] In addition, the rotating motor 18, the linear motor 12, the extension air cylinder 7 and the tension testing meter 16 are connected with an external control system and a computer, the reducer is provided, the power supply is provided, and the extension air cylinder 7 is connected with an air compressor. It is uniform in the prior art. It should be understood that the rotating motor 18 herein has a self-locking function, and if the self-locking strength is insufficient, a ratchet mechanism can be arranged at one end of the rotating shaft 2 to prevent the self-locking function from being overloaded during tension testing. Of course, the arrangement and installation of the ratchet mechanism are known to those skilled in the art to prevent reverse rotation.

[0021] Among them, the inner side wall of the shell 9 is respectively provided with a first proximity sensor 5 and a second proximity sensor 14 on both sides, the position of the first sensor is close to the side where the rubber sheet 1 enters, and the first proximity sensor 5 and the second proximity sensor 14 are connected with an external control system. In order to improve the degree of automation, the first proximity sensor 5 transmits a signal to start the rotating motor 18 after sensing the entry of the rubber sheet 1, the second proximity sensor 14 transmits a signal to stop the rotating motor 18 after sensing the entry of the rubber sheet 1, and the linear motor 12 is started at the same time. Automatic transmission, convenient control of the position of the rubber sheet 1, high degree of automation, and convenient operation of personnel.

[0022] Among them, the outer surface of the conveying roller 4 and the inner side wall of the push plate 11 are respectively and uniformly provided with protrusions 3 capable of increasing the friction between the rubber sheet 1, so as to improve the fixing ability of the rubber sheet 1.

[0023] The concave groove 10 is arranged on the inner side wall of the shell 9 corresponding to the position of the push plate 11, the push plate 11 can stay in the concave groove 10, and the transmission of the rubber sheet 1 is avoided from being affected.

[0024] The cross section shape of the push plate 11 is arc-shaped, and the inner side wall of the push plate 11 is matched with the surface of the transmission roller 4, the contact area with the rubber sheet 1 is increased, the friction is increased, and the stability of the fixation is improved.

[0025] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rubber tensile testing device, characterized in that, The system includes a base plate (15), a first fixed plate (8), a second fixed plate (17), a telescopic cylinder (7), a tensile tester (16), and a pair of clamps. The first fixed plate (8) and the second fixed plate (17) are respectively disposed on both sides of the upper surface of the base plate (15). The telescopic cylinder (7) is disposed on the first fixed plate (8), and the telescopic end of the telescopic cylinder (7) extends through the inner side of the first fixed plate (8). The tensile tester (16) is disposed on the inner side wall of the second fixed plate (17) and is at the same height as the telescopic end of the telescopic cylinder (7). The pair of clamps are symmetrically designed and are respectively disposed on the telescopic end of the telescopic cylinder (7) and the tensile tester (16). The clamps include a fixing block (6), a semi-cylindrical housing (9), a conveying roller (4), a linear motor (12), a push plate (11), and a rotary motor (18) with a self-locking function. The fixing block (6) in the pair of clamps is respectively connected to the telescopic end of the telescopic cylinder (7) and the tensile tester (16). The housing (9) is fixedly connected to the fixed block (6). The conveyor roller (4) is rotatably disposed inside the housing (9), and a certain distance is set between the surface of the conveyor roller (4) and the inner side wall of the housing (9). The rotating motor (18) is disposed on the side wall of the end face of the housing (9), and the output end of the rotating motor (18) is connected to the rotating shaft (2). The rotating shaft (2) passes through the axis of the conveyor roller (4) and can drive the conveyor roller (4) to rotate. The linear motor (12) is disposed at the bottom of the outer side wall of the housing (9) and is fixedly connected to the housing (9) through the mounting base (13). The telescopic end of the linear motor (12) passes through the housing (9) and is fixedly connected to the push plate (11). The linear motor (12) can push the push plate (11) to press the rubber sheet (1) onto the conveyor roller (4). The telescopic cylinder (7), the linear motor (12), the rotating motor (18), and the tensile tester (16) are connected to the external control system and the computer respectively.

2. The rubber tensile testing device according to claim 1, characterized in that, The inner sidewall of the housing (9) is provided with a first proximity sensor (5) and a second proximity sensor (14) respectively. The first proximity sensor is located close to the side where the rubber sheet (1) enters. The first proximity sensor (5) and the second proximity sensor (14) are connected to an external control system.

3. The rubber tensile testing device according to claim 1, characterized in that, The outer surface of the conveying roller (4) and the inner wall of the push plate (11) are uniformly provided with protrusions (3) that can increase the friction between the conveying roller (4) and the rubber sheet (1).

4. The rubber tensile testing device according to claim 1, characterized in that, The inner wall of the housing (9) is provided with a groove (10) corresponding to the position of the push plate (11), and the push plate (11) can stay in the groove (10).

5. The rubber tensile testing device according to claim 1, characterized in that, The push plate (11) has an arc-shaped cross-section, and the inner wall of the push plate (11) matches the surface of the conveyor roller (4).

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