Resistor body repair fixture with bidirectional synchronous correction and fixing function

Abstract

The utility model discloses a fixture for resistor body repairing with bidirectional synchronous correction and fixing function, including a fixture seat, a clamping screw and a pressing plate, a mounting groove is arranged on the fixture seat, the first side groove wall surface of the mounting groove is a groove wall inclined surface, a plurality of screw holes are arranged on the groove bottom of the mounting groove, a pressing plate is placed in the mounting groove and located above the plurality of screw holes, a plurality of screw rods of the clamping screws pass through a plurality of pressing plate through holes on the pressing plate from top to bottom and are connected with the plurality of screw holes, a side surface of the pressing plate close to the first side groove wall of the mounting groove is a pressing plate inclined surface, the groove wall inclined surface and the pressing plate inclined surface jointly form a regular "eight" shape and the space between the two is used to place the resistor body to be repaired. The utility model can clamp and fix the upper parts of the two opposite sides of the resistor body in the horizontal and vertical directions at the same time, avoiding the problem of cracking or warping of the resistor body, and can automatically correct the warped resistor body, thereby improving the linear accuracy and efficiency of repairing.

Description

Technical Field

[0001] The utility model relates to a resistor body trimming fixture, in particular to a resistor body trimming fixture with a bidirectional synchronous correction and fixing function. Background Art

[0002] As industrial control systems develop towards miniaturization and precision, the position feedback linear displacement sensors (or potentiometers) used in conjunction with them are also widely used. The linear accuracy requirements of the resistor, one of the core components of the linear displacement sensor, are also gradually increasing.

[0003] The resistor of the linear displacement sensor is generally a conductive plastic resistor, that is, a strip-shaped conductive plastic layer (formed by solidifying a slurry including metal and non-metal materials) is arranged on the surface of the insulating resistor body (generally in the shape of a rectangular parallelepiped) as a resistance band (also called a working band), and a brush is used to contact and slide on the resistance band to achieve the purpose of collecting changing electrical signals. The resistance band can be one or more, and a conductive band for transmitting electrical signals can also be arranged on the resistor body.

[0004] In order to improve the linear accuracy of the resistor and thus improve the detection accuracy of the linear displacement sensor, it is generally necessary to trim the resistor band on the resistor. Before trimming, the resistor needs to be clamped and fixed with a fixture, which is the resistor trimming fixture.

[0005] like Figure 1 As shown, the conventional resistor trimming fixture includes a fixture plate 3, on which a rectangular clamping groove (not marked in the figure) is provided, and a plurality of locking screws 1 are installed on one side wall of the clamping groove. When in use, the resistor 2 is placed in the clamping groove, and then the plurality of locking screws 1 are tightened, and the ends of the plurality of locking screws 1 are pressed against one side outer wall of the resistor 2 to achieve clamping and fixing of the resistor 2, and then the resistor band on the resistor 2 is linearly trimmed.

[0006] The above-mentioned conventional resistor body trimming fixture has the following defects:

[0007] First, the resistor 2 is generally a laminate, and the locking screw 1 on the side can easily damage the resistor 2 and cause it to crack; second, the pressure applied by the locking screw 1 to the side of the resistor 2 has the risk of causing the resistor 2 to warp, and the linear trimming data in the warped deformation state and the normal state are quite different; third, for a longer or thinner resistor 2, it is easy to warp in the length direction before trimming and clamping, and the above-mentioned traditional resistor trimming fixture cannot correct the warped part. If the resistor 2 is warped, it will inevitably be quite different from the linear trimming data after assembly (that is, the final finished product is installed, and the resistor 2 is fixed to the bottom of the sensor housing with multiple screws, that is, the correction state). The following two results both have great disadvantages: First, the initial trimming linear accuracy is qualified, but the linear accuracy after the finished product is assembled is poor and cannot meet the application requirements; second, in order to ensure that the linear accuracy of the finished product is qualified, the requirements for the initial linear trimming are significantly increased, which greatly increases the difficulty and cost of trimming. Utility Model Content

[0008] The purpose of the utility model is to provide a resistor body repair and engraving fixture which will not damage the resistor body and has a bidirectional synchronous correction and fixing function in order to solve the above problems.

[0009] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0010] A fixture for repairing a resistor body with a bidirectional synchronous correction and fixing function, includes a fixture seat and a clamping screw, and also includes a horizontal pressure plate, the fixture seat is provided with a concave installation groove on the top, the first side groove wall surface on the opposite sides of the installation groove is a groove wall inclined surface, and a plurality of screw holes are provided on the groove bottom of the installation groove near the second side groove wall on the opposite sides of the installation groove, the pressure plate is placed in the installation groove and is located above the plurality of screw holes, the screw rods of the plurality of clamping screws pass through the plurality of pressure plate through holes on the pressure plate from top to bottom and are connected to the plurality of screw holes, a side surface of the pressure plate near the first side groove wall of the installation groove is a pressure plate inclined surface, the groove wall inclined surface and the pressure plate inclined surface together form a regular "eight" shape and the space between the two is used to place the resistor body to be repaired, the height of the groove wall inclined surface and the height of the pressure plate inclined surface are both greater than the height of the resistor body.

[0011] Preferably, in order to have a buffering effect when the pressure plate is tightened to avoid impact damage to the resistor caused by rapid downward pressure of the pressure plate, and to facilitate the ejection of the pressure plate during disassembly to facilitate rapid disassembly, the resistor repair fixture with bidirectional synchronous correction and fixing function also includes a compression spring, and a plurality of blind holes are provided on the bottom of the mounting groove near the second side groove wall of the mounting groove, and a plurality of vertical compression springs are respectively placed in the plurality of blind holes and are located below the pressure plate.

[0012] Preferably, in order to achieve better assembly and disassembly functions, every two of the blind holes arranged in the direction of the line between the two sides of the installation groove form a group, and multiple groups of blind holes and multiple screw holes are arranged in sequence in the length direction of the same side of the bottom of the installation groove.

[0013] Preferably, in order to guide the pressing operation of the pressing plate by utilizing the second side groove wall surface of the mounting groove and the corresponding side surface of the pressing plate, the second side groove wall surface of the mounting groove and a side surface of the pressing plate close to the second side groove wall of the mounting groove are both vertical planes.

[0014] Preferably, in order to allow the pressure plate to have an adaptive micro-movement space during the downward pressing process, the pressure plate through hole is a strip through hole and the length direction of the strip through hole is the direction of the connection between the two sides of the installation sink.

[0015] Preferably, in order to provide better clamping, fixing and deformation correction functions for both sides of the resistor, the angle between the inclined surface of the groove wall and the vertical direction is the same as the angle between the inclined surface of the pressure plate and the vertical direction and is 30°-60°.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a clamp seat, a pressure plate and a clamping screw that cooperate with each other, and utilizes the effect of the combined effect of the inclined surface of the groove wall and the inclined surface of the pressure plate. It can simultaneously clamp and fix the upper parts of the opposite sides of the resistor body horizontally and vertically during the pressing process of the pressure plate, thereby avoiding the problem of cracking or warping of the resistor body due to clamping and fixing, and can automatically correct the warped resistor body during the pressing process of the pressure plate. Under the premise of basically not increasing the cost of repairing, it ensures that the linear accuracy of the repair is consistent with the linear accuracy of the finished product after assembly, greatly improves the linear accuracy and efficiency of the repair, reduces the scrap cost, and meets the application needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the application of the traditional resistor body trimming fixture;

[0019] Figure 2 It is a three-dimensional diagram of the fixture seat of the resistor body repair fixture with bidirectional synchronous correction and fixing function of the utility model, and the figure also shows part of the clamping screw and the compression spring;

[0020] Figure 3 It is a three-dimensional diagram of the pressing plate of the resistor body repair fixture with bidirectional synchronous correction and fixing function described in the utility model;

[0021] Figure 4 It is a three-dimensional diagram of the resistor body trimming fixture with bidirectional synchronous correction and fixing function after being assembled;

[0022] Figure 5 It is a three-dimensional diagram of the resistor body trimming fixture with bidirectional synchronous correction and fixing function after being assembled when in use. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings:

[0024] like Figure 2-Figure 5 As shown, the resistor body repair fixture with bidirectional synchronous correction and fixing function described in the utility model includes a fixture seat 4, a clamping screw 8 and a horizontal pressing plate 12, a concave installation groove 5 is provided on the top of the fixture seat 4, the first side groove wall surface on the opposite sides of the installation groove 5 is a groove wall inclined surface 10, and a plurality of screw holes 6 are provided on the groove bottom of the installation groove 5 near the second side groove wall on the opposite sides of the installation groove 5, the pressing plate 12 is placed in the installation groove 5 and is located above the plurality of screw holes 6, the screw rods of the plurality of clamping screws 8 pass through the plurality of pressing plate through holes 13 on the pressing plate 12 from top to bottom and are connected to the plurality of screw holes 6, a side surface of the pressing plate 12 near the first side groove wall of the installation groove 5 is a pressing plate inclined surface 14, the groove wall inclined surface 10 and the pressing plate inclined surface 14 together form a regular "eight" shape and the space between the two is used to place the resistor body 2 to be repaired, the height of the groove wall inclined surface 10 and the height of the pressing plate inclined surface 14 are both greater than the height of the resistor body 2.

[0025] like Figure 2-Figure 5 As shown, the utility model also discloses the following more optimized specific structures:

[0026] In order to have a buffering effect when the pressing plate 12 is pressed to avoid impact damage to the resistor 2 caused by the rapid downward pressure of the pressing plate 12, and at the same time to facilitate the ejection of the pressing plate 12 during disassembly to facilitate rapid disassembly, the resistor repair fixture with bidirectional synchronous correction and fixing function also includes a compression spring 9, and a plurality of blind holes 7 are provided on the bottom of the mounting groove 5 near the second side groove wall of the mounting groove 5, and a plurality of vertical compression springs 9 are respectively placed in the plurality of blind holes 7 and are located below the pressing plate 12.

[0027] In order to achieve better assembly and disassembly functions, every two blind holes 7 arranged in the direction of the connecting line between the two sides of the installation groove 5 are a group, and multiple groups of blind holes 7 and multiple screw holes 6 are arranged in sequence in the length direction of the same side of the groove bottom of the installation groove 5.

[0028] In order to guide the pressing operation of the pressing plate 12 by using the second side groove wall surface 11 of the mounting groove 5 and the corresponding side surface of the pressing plate 12, the second side groove wall surface 11 of the mounting groove 5 and a side surface 15 of the pressing plate 12 close to the second side groove wall of the mounting groove 5 are both vertical planes.

[0029] In order to allow the pressing plate 12 to have an adaptive micro-movement space during the downward pressing process, the pressing plate through hole 13 is a strip through hole and the length direction of the strip through hole is the connection direction between the two sides of the mounting groove 5.

[0030] In order to better clamp and fix the two sides of the resistor 2 and correct deformation, the angle between the groove wall inclined surface 10 and the vertical direction and the angle between the pressing plate inclined surface 14 and the vertical direction are the same and are 30°-60°.

[0031] like Figure 2-Figure 5 As shown, when used, the resistor body 2 to be repaired is first placed in the installation sink groove 5, and then it is close to the first side groove wall of the installation sink groove 5 and contacts with the groove wall inclined surface 10, and then a plurality of compression springs 9 are respectively placed in a plurality of blind holes 7 (the compression springs 9 can also be installed first), and then the pressing plate 12 is inserted from top to bottom between the second side groove wall of the installation sink groove 5 and the resistor body 2, and a side surface 15 of the pressing plate 12 and a second side groove wall surface 11 of the installation sink groove 5 are in surface contact with each other, and then the screw rods of a plurality of clamping screws 8 are passed from top to bottom through a plurality of clamping plate through holes 13 on the clamping plate 12 and connected with a plurality of screw holes 6, and then the clamping screws 8 are gradually tightened. In this process, the clamping plate inclined surface 14 gradually contacts the corresponding side groove wall 11 of the resistor body 2. The upper side is pressed, and its pressing force includes downward vertical pressure and lateral pressure in the direction close to the groove wall slope 10. The vertical pressure presses the corresponding side of the resistor 2 downward on the one hand, and presses down and corrects the part of the resistor 2 that has been warped and deformed on the other hand. The lateral pressure presses the resistor 2 in the direction close to the groove wall slope 10, and uses the reaction force of the groove wall slope 10 to press the other side of the resistor 2 downward and at the same time press it in the direction close to the pressure plate 12, finally achieving the function of reliably clamping and fixing the resistor 2 in the horizontal and vertical directions without causing the resistor 2 to crack and warp and deform, and being able to correct the warped and deformed part, and then the resistor band on the resistor 2 can be trimmed. After the trimming is completed, loosen the clamping screw 8, and under the action of the compression spring 9, the pressure plate 12 can be easily lifted up and taken out, and then the trimmed resistor 2 can be removed, completing this trimming operation.

[0032] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A resistor body trimming fixture with bidirectional synchronous correction and fixing function, comprising a fixture seat and a clamping screw, characterized in that: It also includes a horizontal pressure plate, a concave installation groove is provided on the top of the clamp seat, the first side groove wall surface on the opposite sides of the installation groove is a groove wall inclined surface, and a plurality of screw holes are provided on the groove bottom of the installation groove near the second side groove wall on the opposite sides of the installation groove, the pressure plate is placed in the installation groove and is located above the plurality of screw holes, and the screw rods of the plurality of clamping screws pass through the plurality of pressure plate through holes on the pressure plate from top to bottom and are connected to the plurality of screw holes, and a side surface of the pressure plate near the first side groove wall of the installation groove is a pressure plate inclined surface, the groove wall inclined surface and the pressure plate inclined surface together form a regular "eight" shape and the space between the two is used to place the resistor to be repaired, and the height of the groove wall inclined surface and the height of the pressure plate inclined surface are both greater than the height of the resistor.

2. The resistor body trimming fixture with bidirectional synchronous correction and fixing function according to claim 1 is characterized in that: The resistor body repair fixture with bidirectional synchronous correction and fixing function also includes a compression spring. A plurality of blind holes are provided on the bottom of the mounting groove near the second side groove wall of the mounting groove. A plurality of vertical compression springs are respectively placed in the plurality of blind holes and are located below the pressure plate.

3. The resistor body trimming fixture with bidirectional synchronous correction and fixing function according to claim 2 is characterized in that: Every two blind holes arranged in the direction of the line connecting the two sides of the installation sink groove form a group, and a plurality of groups of blind holes and a plurality of screw holes are sequentially arranged at intervals in the length direction of the same side of the bottom of the installation sink groove.

4. The resistor body trimming fixture with bidirectional synchronous correction and fixing function according to claim 1, 2 or 3, characterized in that: The second side groove wall surface of the installation groove and the side surface of the pressing plate close to the second side groove wall of the installation groove are both vertical planes.

5. The resistor body trimming fixture with bidirectional synchronous correction and fixing function according to claim 1, 2 or 3, characterized in that: The pressure plate through hole is a strip-shaped through hole, and the length direction of the strip-shaped through hole is the direction of the connection line between the two sides of the installation sink.

6. The resistor body trimming fixture with bidirectional synchronous correction and fixing function according to claim 1, 2 or 3, characterized in that: The angle between the groove wall slope and the vertical direction is the same as the angle between the pressing plate slope and the vertical direction and is 30°-60°.

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