Clamping device and electric tension tester using same

Abstract

The utility model discloses a clamping device and an electric tension tester using the same, which comprise a tension disc, a tension sensor, a tension driving device and a clamping device, the clamping device comprises a bottom plate, a first eccentric clamping wheel and a second eccentric clamping wheel, wherein the first eccentric clamping wheel and the second eccentric clamping wheel are eccentrically hinged to the bottom plate and used for clamping a workpiece in a matched mode. The linkage plate is installed on the bottom plate in a sliding mode and is in linkage with the first eccentric clamping wheel and the second eccentric clamping wheel, and the reset spring is arranged on the bottom plate and used for pushing the linkage plate to pull the first eccentric clamping wheel and the second eccentric clamping wheel to be close to each other to clamp a workpiece. A second connecting rod and a first stroke groove which are used for linkage are arranged between the bottom plate and the first eccentric clamping wheel, and a third connecting rod and a second stroke groove which are used for linkage are arranged between the bottom plate and the second eccentric clamping wheel.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wire tension testing, in particular to a novel electric tension tester. BACKGROUND

[0002] In the industrial production and manufacturing process, it is necessary to carry out tension testing on the completed assembly products or semi-finished products. Through this test, it can be determined whether the product has the ability to withstand the standard tension, and at the same time, the maximum tension value that the product can withstand can be detected. Especially in the connection part of the wire and the terminal, in the equipment such as motor with certain working load, the stable connection between the wire and the terminal is the key factor to ensure the long service life of the equipment.

[0003] In the traditional tension testing machine, there is a problem of poor wire fastening. During the tension testing, the product is prone to falling off, which cannot meet the testing requirements of the ultimate tension. For example, the automatic wire harness terminal tension testing machine with patent application number 202022883998.8, from the technical solution disclosed in the patent, the tension sensor is arranged between the terminal chuck and the fixed disc. When the product tension test is carried out, the tension sensor bears the tangential force, and this force makes the data obtained by the tension test have a large error. In addition, the pressure roller adopts the downward cooperation with the pressure disc to clamp the product, but in the process of downward swinging of the knob, the situation of mutual pressing with the limiting plate will appear, which leads to the inability to effectively press the product with thin thickness. Even after the knob contacts with the limiting plate, the phenomenon of slipping will also occur, which makes the product unable to be clamped, and thus the stability of the equipment is greatly reduced.

[0004] Therefore, the present inventors propose the following technical solutions. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the defects of the prior art, and provides a novel electric tension tester.

[0006] In order to solve the above technical problems, the utility model adopts the following first technical scheme:

[0007] The utility model provides a clamping device, including bottom plate, first eccentric clamping wheel and second eccentric clamping wheel are respectively eccentrically hinged and are installed on the bottom plate and are used for fitting clamping workpiece, the linkage plate is slidably installed on the bottom plate and is linked with first eccentric clamping wheel and second eccentric clamping wheel, and the reset spring is arranged between the bottom plate and the linkage plate and is used for pushing the linkage plate and pulling first eccentric clamping wheel and second eccentric clamping wheel to each other and clamping workpiece, wherein, the bottom plate is provided with the second connecting rod and the first stroke slot for linkage between the first eccentric clamping wheel, and the bottom plate is provided with the third connecting rod and the second stroke slot for linkage between the second eccentric clamping wheel.

[0008] Further, in the above technical solution, the middle part of the bottom plate is provided with a positioning sliding groove for positioning and sliding the linkage plate, wherein the first eccentric clamping wheel and the second eccentric clamping wheel are respectively hingedly installed on both sides of the positioning sliding groove.

[0009] Further, in the above technical solution, the first mounting groove for mounting the reset spring is arranged in the positioning sliding groove, the direction of the first mounting groove is consistent with the movement direction of the linkage plate, and the first connecting rod is arranged on the linkage plate and protrudes into the first mounting groove and abuts against one end of the reset spring.

[0010] Further, in the above technical solution, the first connecting rod, the second connecting rod and the third connecting rod are integrally formed on the linkage plate.

[0011] Further, in the above technical solution, the first stroke slot and the second stroke slot are respectively located at the bottom of the first eccentric clamping wheel and the second eccentric clamping wheel, and the second connecting rod and the third connecting rod are installed on the linkage plate and protrude into the first stroke slot and the second stroke slot.

[0012] Further, in the above technical solution, the first eccentric clamping wheel and the second eccentric clamping wheel are respectively installed on the bottom plate through the first bolt and the second bolt, the first sleeve and the second sleeve for rotating the first eccentric clamping wheel and the second eccentric clamping wheel are respectively arranged on the first bolt and the second bolt, and the knob is arranged on the first eccentric clamping wheel for operation.

[0013] In order to solve the above technical problems, the utility model adopts the following second technical scheme:

[0014] A novel electric tension tester, including tension disc, tension sensor, tension driving device and clamping device, wherein, the tension disc sets up at one end of tension sensor and is used for fixed workpiece one end, clamping device sets up on tension driving device and is used for clamping workpiece the other end, through tension driving device drives clamping device to be away from tension disc to workpiece and carries out the stretching.

[0015] Further, in the technical scheme, one end of the tension sensor is fixed by the first vertical plate, and the other end of the tension sensor is provided with a cantilever beam for supporting and installing a tension disc, and the tension disc is installed on the cantilever beam through a tension pin shaft.

[0016] Further, in the technical scheme, one end of the tension sensor is fixed by the first vertical plate, and the other end of the tension sensor is provided with a cantilever beam for supporting and installing a tension disc, and the tension disc is installed on the cantilever beam through a tension pin shaft.

[0017] After the technical scheme is adopted, the utility model has the advantages that: when the user pushes the first eccentric clamping wheel to produce eccentric swing, the first eccentric clamping wheel will push the connecting block to slide through the first positioning pin when swinging, and the second eccentric clamping wheel will swing when the connecting block slides through the second positioning pin, so that when the user pushes the first eccentric clamping wheel to swing, the second eccentric clamping wheel will also swing, and because the first eccentric clamping wheel and the second eccentric clamping wheel have the first stroke groove and the second stroke groove for the first positioning pin and the second positioning pin to slide, when the first eccentric clamping wheel swings away from the second eccentric clamping wheel, the second eccentric clamping wheel will also swing away from the first eccentric clamping wheel, so that the first eccentric clamping wheel and the second eccentric clamping wheel are separated to produce a clamping space, so as to place the workpiece between the first eccentric clamping wheel and the second eccentric clamping wheel; when the first eccentric clamping wheel is released, the connecting plate will be pushed back under the action of the return spring, so that the first eccentric clamping wheel and the second eccentric clamping wheel swing synchronously to clamp the workpiece, and during the stretching of the workpiece, the first eccentric clamping wheel and the second eccentric clamping wheel will be closer to clamp the workpiece due to the tension, so that the workpiece is stably clamped, and the workpiece is prevented from falling off, and the embossing for increasing friction is arranged on the first eccentric clamping wheel and the second eccentric clamping wheel, so as to prevent the workpiece from slipping during the stretching. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the perspective view of the utility model;

[0019] Figure 2 is the internal structure view of the utility model;

[0020] Figure 3 is the perspective view of the clamping device in the utility model;

[0021] Figure 4 is the exploded view of the clamping device in the utility model Figure 1 ;

[0022] Figure 5 is the exploded view of the clamping device in the utility model Figure 2 ;

[0023] Figure 6 is the plan view of the clamping device in the utility model;

[0024] Figure 7 is Figure 6 the sectional view of A-A in the utility model;

[0025] Figure 8 is Figure 6 the sectional view of B-B in the utility model. DETAILED DESCRIPTION:

[0026] The utility model is further illustrated in connection with specific embodiments and drawings.

[0027] see Figures 3 to 5 , it is a kind of clamping device, including: bottom plate 41, respectively eccentrically hinged and installed on bottom plate 41 and is used to cooperate first eccentric clamping wheel 42 and second eccentric clamping wheel 43 for clamping workpiece, slidingly installed in bottom plate 41 and with first eccentric clamping wheel 42 and second eccentric clamping wheel 43 linkage linkage plate 44 and set between bottom plate 41 and linkage plate 44 and are used to push linkage plate 44 and pull first eccentric clamping wheel 42 and second eccentric clamping wheel 43 and mutually draw close clamping workpiece of reset spring 40, wherein, bottom plate 41 and first eccentric clamping wheel 42 between there is for linkage second connecting rod 45 and first stroke slot 421, bottom plate 41 and second eccentric clamping wheel 43 between there is for linkage third connecting rod 46 and second stroke slot 431.

[0028] In the clamping device 4, the first positioning pin 45 and the second positioning pin 46 are used to realize the linkage between the linkage block 44 and the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43, and the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 are respectively eccentrically hinged to the bottom plate 41. When the user pushes the first eccentric clamping wheel 42 to generate eccentric swing, the first eccentric clamping wheel 42 will push the linkage block 44 to slide through the first positioning pin 45 when it swings, and the second eccentric clamping wheel 43 will swing when the linkage block 44 slides through the second positioning pin 46, so that when the user pushes the first eccentric clamping wheel 42 to swing, the second eccentric clamping wheel 43 will also swing. Because there are first stroke grooves 421 and second stroke grooves 431 on the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 for the first positioning pin 45 and the second positioning pin 46 to slide, when the first eccentric clamping wheel 42 swings away from the second eccentric clamping wheel 43, the second eccentric clamping wheel 43 will also swing away from the first eccentric clamping wheel 42 at the same time, thereby realizing the separation between the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 to generate a clamping space, so as to place the workpiece between the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43. When the first eccentric clamping wheel 42 is released, the return spring 40 will generate a pushing force to push the linkage plate 44 back to its original position, thereby pulling the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 to swing and close to clamp the workpiece. During the stretching process of the workpiece, the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 will be closer to clamp the workpiece due to the pulling force, thereby realizing stable clamping of the workpiece and avoiding falling off. The first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 are provided with embossing for increasing friction to avoid slipping of the workpiece during the stretching process.

[0029] The middle part of the bottom plate 41 is provided with a positioning sliding groove 411 for positioning and sliding the linkage plate 44, wherein the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 are respectively hingedly installed on both sides of the positioning sliding groove 411.

[0030] The positioning sliding groove 411 is provided with a first mounting groove 412 for mounting the return spring 40, and the direction of the first mounting groove 412 is consistent with the movement direction of the linkage plate 44. The first linkage rod 441 is provided on the linkage plate 44 and extends into the first mounting groove 412 and abuts against one end of the return spring 40.

[0031] The first linkage rod 441, the second linkage rod 45 and the third linkage rod 46 are integrally formed on the linkage plate 44. Of course, in this embodiment, the first linkage rod 441, the second linkage rod 45 and the third linkage rod 46 are detachably mounted on the linkage plate 44, thereby facilitating processing, reducing material waste and saving cost.

[0032] The first stroke groove 421 and the second stroke groove 431 are respectively located at the bottom of the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43, and the second connecting rod 45 and the third connecting rod 46 are installed on the linkage plate 44 and extend upward into the first stroke groove 421 and the second stroke groove 431.

[0033] The first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 are respectively installed on the bottom plate 41 through the first bolt 48 and the second bolt 49, and the first sleeve 480 and the second sleeve 490 for rotating the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 are respectively sleeved and installed on the first bolt 48 and the second bolt 49, wherein the first eccentric clamping wheel 42 is provided with a pull lever 47 for operation.

[0034] See Figures 1 to 5 As shown in the drawings, a new electric tension tester comprises a tension disc 1, a tension sensor 2, a tension driving device 3 and a clamping device 4, wherein the tension disc 1 is arranged at one end of the tension sensor 2 and used for fixing one end of a workpiece, the clamping device 4 is arranged on the tension driving device 3 and used for clamping the other end of the workpiece, and the tension driving device 3 drives the clamping device 4 to move away from the tension disc 1 to stretch the workpiece. The tension disc 1 is installed at one end of the tension sensor 2, and when the tension driving device 3 drives the clamping device 4 to drive the workpiece to pull the tension disc 1, the tension sensor 2 bears a direct tensile stress, so that the force data is more accurate and can bear greater tension. Secondly, the tension disc 1 is combined by a disc seat 11 and a clamping ring 12, which is not only convenient for production and processing, but also has higher strength and is not easy to be deformed by tension. The disc seat 11 and the clamping ring 12 are made of stainless steel and are fixed together by interference fit through pressure connection. The tension disc 1 is arranged in a split structure, and the disc seat 11 and the clamping ring 12 are made of stainless steel, which is not only convenient for processing and production, but also has high strength, is not easy to rust, has long service life and low cost, and can greatly reduce the cost of enterprises.

[0035] One end of the tension sensor 2 is supported and fixed by a first vertical plate 5, the other end of the tension sensor 2 is provided with a cantilever beam 6 for supporting and installing the tension disc 1, and the tension disc 1 is installed on the cantilever beam 6 through a tension pin shaft 7.

[0036] One side of the first vertical plate 5 is provided with a reinforcing rib plate 50, which is located on one side of the tension sensor 2 and below the tension sensor 2. The cantilever beam 6 and the tension sensor 2, the tension sensor 2 and the first vertical plate 5, and the reinforcing rib plate 50 and the first vertical plate 5 are all fixed by bolts.

[0037] The tension driving device 3 comprises a moving seat 31 arranged beside the tension disc 1 and capable of moving close to or away from each other, a guide frame 32 for positioning and guiding the moving seat 31, a lead screw module 33 penetrating through the moving seat 31 and capable of driving the moving seat 31 to move, a motor 34 arranged on the guide frame 32 and used for driving the lead screw module 33 to move, and a belt pulley set 35 for connecting the motor 34 and the lead screw module 33, and the clamping device 4 is installed on the moving seat 31.

[0038] In conclusion, during the working of the utility model, the tension disc 1 is locked and installed on the cantilever beam 6 through the bolt column 7, and one end of the workpiece is clamped and fixed on the tension disc 1, such as welding the terminal of one end of the wire harness into the slot 13 of the tension disc 1; further, the first eccentric clamping wheel 42 is pushed to separate the first eccentric clamping wheel 42 from the second eccentric clamping wheel 43, after the workpiece is straightened, the other end of the workpiece is placed between the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43, then the first eccentric clamping wheel 42 is loosened, under the action of the reset spring 40, the connecting plate 44 is pushed to drive the first eccentric clamping wheel 42 and the second eccentric clamping wheel 43 to close to clamp the other end of the workpiece; further, under the action of the tension driving device 3, the clamping device 4 drives the workpiece to move away from the tension disc 1, and the clamping force on the workpiece is increased with the movement of the clamping device 4, so as to avoid the workpiece from falling off, and when the tension disc 1 is pulled by the workpiece, the force is applied to the tension sensor 2, and the tension of the workpiece is tested by the tension sensor 2; further, when it is needed to test whether the workpiece meets the design tension, the tension sensor 2 detects that the tension reaches the design requirement, and feeds back to the control system, and the tension driving device 3 is controlled to stop working and return to the initial position, and when the limit tension of the workpiece is tested, the tension driving device 3 continuously pulls the workpiece until the workpiece is broken, at this time, the maximum value recorded by the tension sensor 2 is the limit tension that the workpiece can bear, and when the tension detected by the tension sensor 2 reaches the maximum value and then decreases, it is judged that the workpiece has been broken, at this time, the control system is fed back, and the tension driving device 3 is controlled to stop working and return to the initial position; finally, the workpiece is taken down, and a new workpiece is replaced to continue testing.

[0039] Of course, the above only is the specific embodiment of the utility model, and does not limit the utility model implementation range, and equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope should be included in the utility model patent application scope.

Claims

1. A clamping device, characterized in that The device comprises a base plate (41), a first eccentric clamping wheel (42) and a second eccentric clamping wheel (43) eccentrically hinged to the base plate (41) and used for clamping workpieces, a linkage plate (44) slidingly mounted to the base plate (41) and linked with the first eccentric clamping wheel (42) and the second eccentric clamping wheel (43), and a reset spring (40) arranged between the base plate (41) and the linkage plate (44) and used for pushing the linkage plate (44) to pull the first eccentric clamping wheel (42) and the second eccentric clamping wheel (43) to clamp the workpieces, wherein the base plate (41) and the first eccentric clamping wheel (42) are provided with a second connecting rod (45) and a first stroke slot (421) for linkage, and the base plate (41) and the second eccentric clamping wheel (43) are provided with a third connecting rod (46) and a second stroke slot (431) for linkage. The middle part of the base plate (41) is provided with a positioning sliding groove (411) for positioning and sliding of the linkage plate (44), wherein the first eccentric clamping wheel (42) and the second eccentric clamping wheel (43) are respectively hinged to the two sides of the positioning sliding groove (411).

2. The clamping device of claim 1, wherein: The positioning sliding groove (411) is provided with a first mounting slot (412) for mounting the reset spring (40), and the direction of the first mounting slot (412) is consistent with the movement direction of the linkage plate (44); the linkage plate (44) is provided with a first connecting rod (441) extending into the first mounting slot (412) and pressing one end of the reset spring (40).

3. The clamping device of claim 2, wherein: The first connecting rod (441), the second connecting rod (45) and the third connecting rod (46) are integrally formed on the linkage plate (44).

4. The clamping device of claim 3, wherein: The first stroke slot (421) and the second stroke slot (431) are respectively located at the bottom of the first eccentric clamping wheel (42) and the second eccentric clamping wheel (43), and the second connecting rod (45) and the third connecting rod (46) are mounted on the linkage plate (44) and extend upward into the first stroke slot (421) and the second stroke slot (431).

5. The clamping device of claim 1, wherein: The first eccentric clamping wheel (42) and the second eccentric clamping wheel (43) are respectively mounted on the base plate (41) through the first bolt (48) and the second bolt (49), and the first sleeve (480) and the second sleeve (490) for rotating the first eccentric clamping wheel (42) and the second eccentric clamping wheel (43) are respectively mounted on the first bolt (48) and the second bolt (49), wherein the first eccentric clamping wheel (42) is provided with a lever (47) for operation.

6. The clamping device of claim 1, wherein: The device comprises a tension disc (1), a tension sensor (2), a tension driving device (3) and a clamping device (4) according to any one of claims 1-6, wherein the tension disc (1) is arranged at one end of the tension sensor (2) and used for fixing one end of a workpiece, the clamping device (4) is arranged on the tension driving device (3) and used for clamping the other end of the workpiece, and the workpiece is stretched by driving the clamping device (4) away from the tension disc (1) through the tension driving device (3).

7. A new electric pull tester characterized in that, ​ 8. The new electric pull tester according to claim 7, characterized in that: One end of the tension sensor (2) is supported and fixed by the first vertical plate (5), the other end of the tension sensor (2) is provided with a cantilever beam (6) for supporting and installing the tension disc (1), and the tension disc (1) is installed on the cantilever beam (6) through a tension pin shaft (7).

9. The new electric pull tester according to claim 8, characterized in that: One side of the first vertical plate (5) is provided with a reinforcing rib plate (50), which is located on one side of the tension sensor (2) and below the tension sensor (2).

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