clamp
By designing a clamping structure consisting of a left clamping arm, a right clamping arm, a rotating shaft, and a torsion spring, and combining it with insulating blocks and terminals of different sizes, the problems of unstable contact and wiring errors in existing clamps were solved, thereby improving the accuracy and safety of measurements.
Patent Information
- Application Number
- CN202521413102.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-07
AI Technical Summary
Existing measuring fixtures are prone to problems such as unstable contact and detachment during use, and there is a risk of wiring errors, which affects the accuracy and safety of measurements.
A clamp was designed, including a left clamping arm, a right clamping arm, a rotating shaft, and a torsion spring. It is physically insulated by an insulating block, and the contact area is increased by connecting copper plates and soft copper strips. Different sizes of terminals are used to prevent wiring errors. The connecting copper strip is fixed by bolts and fastening bolts to ensure contact stability.
It effectively avoids fixture loosening and falling off, as well as wiring errors, improving the accuracy and safety of measurements and ensuring stable contact even on uneven workpiece surfaces.
Smart Images
Figure CN224682270U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clamping technology, specifically clamps. Background Technology
[0002] The four-wire measurement method is a technique for accurately measuring low-resistance resistors (especially micro-ohm resistors). Its core feature is eliminating the influence of lead resistance and contact resistance by separating the current injection line and the voltage measurement line. To achieve this, a specially designed fixture is needed to fix the workpiece under test and perform the functions of current injection and voltage measurement.
[0003] In order to facilitate operation, existing measuring fixtures are directly clamped onto the workpiece to be measured. Due to the small contact area between the fixture and the workpiece, unstable contact is likely to occur, and the measuring fixture may even loosen and fall off, affecting the user's normal use. In addition, wiring errors are also likely to occur during operation. Utility Model Content
[0004] The purpose of this invention is to provide a fixture to solve the problem mentioned in the background art that the currently used measuring fixtures are prone to unstable contact or even falling off during use.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a clamp, comprising: a left clamping arm and a torsion spring, wherein a right clamping arm is connected to one side of the left clamping arm, a rotating shaft is connected between the left clamping arm and the right clamping arm, and the torsion spring is installed on the outside of the rotating shaft; Insulating blocks are installed on the outer sides of the left and right clamping arms. The insulating blocks are fixed to the outer sides of the left and right clamping arms by screws. A connecting copper plate is connected to one end of each of the left and right clamping arms.
[0006] Preferably, the connecting copper plate is connected to one end of the left and right clamping arms via a terminal block.
[0007] Preferably, the size of the terminal block connected to the right clamp arm on the right side is larger than the size of the terminal block connected to the left clamp arm.
[0008] Preferably, one side of one of the connecting copper plates is connected to an inner soft copper strip, which is connected to one side of the connecting copper plate by bolts.
[0009] Preferably, an outer soft copper strip is provided on one side of the inner soft copper strip, and the outer soft copper strip is connected to one side of the connecting copper plate by fastening bolts.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: When using this fixture, the wires can be connected to the corresponding terminals according to the size of the terminals, thereby avoiding wiring errors. Then, the connecting copper plates are clamped onto the workpiece by the left and right clamping arms, and the torsion spring's reset action can prevent loosening. At the same time, the inner and outer soft copper strips located on one side of the connecting copper plates can increase the contact area with the workpiece, ensuring stable contact even if the workpiece surface is uneven. Finally, the current terminal and voltage acquisition terminal can be physically insulated and isolated by the insulating block, thereby increasing the accuracy of the measurement. These are the characteristics of this fixture. Attached Figure Description
[0011] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a schematic diagram of the three-dimensional exploded structure of this utility model; Figure 4 This is a three-dimensional structural diagram of the inner soft copper strip of this utility model.
[0012] In the diagram: 1. Left clamping arm; 2. Right clamping arm; 3. Rotating shaft; 4. Torsion spring; 5. Insulating block; 6. Connecting copper plate; 7. Terminal post; 8. Inner soft copper strip; 9. Bolt post; 10. Outer soft copper strip; 11. Fastening bolt. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] Please see Figure 1 and Figure 3 The present invention provides a technical solution: a clamp, comprising: a left clamping arm 1 and a torsion spring 4, a right clamping arm 2 connected to one side of the left clamping arm 1, a rotating shaft 3 connected between the left clamping arm 1 and the right clamping arm 2, and the torsion spring 4 installed on the outside of the rotating shaft 3. exist Figures 1-3 In the middle, an insulating block 5 is installed on the outside of the left clamping arm 1 and the right clamping arm 2. The insulating block 5 is fixed to the outside of the left clamping arm 1 and the right clamping arm 2 by screws. A connecting copper plate 6 is connected to one end of the left clamping arm 1 and the right clamping arm 2.
[0015] The fixture allows for the installation of insulating blocks 5 on the outer sides of the left clamping arm 1 and the right clamping arm 2 via screws. This provides physical insulation between the current terminal and the voltage acquisition terminal, ensuring accurate measurement.
[0016] exist Figures 1-3 In the middle, the connecting copper plate 6 is connected to one end of the left clamping arm 1 and the right clamping arm 2 through the terminal 7. The size of the terminal 7 connected to the right clamping arm 2 is larger than the size of the terminal 7 connected to the left clamping arm 1.
[0017] This fixture, by using a larger terminal 7 at the excitation current end and a smaller terminal 7 at the voltage acquisition end, can prevent wiring errors and thus increase operational safety.
[0018] exist Figure 4 In the middle, an inner soft copper strip 8 is connected to one side of a set of connecting copper plates 6. The inner soft copper strip 8 is connected to one side of the connecting copper plate 6 by bolt post 9. An outer soft copper strip 10 is provided on one side of the inner soft copper strip 8. The outer soft copper strip 10 is connected to one side of the connecting copper plate 6 by fastening bolt 11.
[0019] The fixture can fix the inner soft copper strip 8 and the outer soft copper strip 10 by bolt column 9 and fastening bolt 11, ensuring the stability of the inner soft copper strip 8 and the outer soft copper strip 10. At the same time, the inner soft copper strip 8 and the outer soft copper strip 10 connected to one side of the copper plate 6 can increase the contact area with the workpiece, so good contact can be guaranteed even when the workpiece surface is uneven.
[0020] In summary: When using this fixture, the wires can be connected to the terminal 7, and then one end of the left clamping arm 1 and the right clamping arm 2 can be forcefully opened. At this time, the connecting copper plate 6 at one end of the left clamping arm 1 and the right clamping arm 2 can be clamped onto the workpiece to be measured. Then, the left clamping arm 1 and the right clamping arm 2 can be released. Under the action of the rotating shaft 3 and the torsion spring 4, the left clamping arm 1 and the right clamping arm 2 will be clamped onto the workpiece, ensuring good contact and preventing loosening. Then, the resistance of the workpiece can be measured. This is the characteristic of the use of this fixture. The contents not described in detail in this description belong to the prior art known to those skilled in the art.
[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. Fixture, including: The left clamping arm (1) and the torsion spring (4) are characterized in that a right clamping arm (2) is connected to one side of the left clamping arm (1), a rotating shaft (3) is connected between the left clamping arm (1) and the right clamping arm (2), and the torsion spring (4) is installed on the outside of the rotating shaft (3). Insulating blocks (5) are installed on the outer sides of the left clamping arm (1) and the right clamping arm (2). The insulating blocks (5) are fixed to the outer sides of the left clamping arm (1) and the right clamping arm (2) by screws. One end of the left clamping arm (1) and the right clamping arm (2) is connected to a connecting copper plate (6). An inner soft copper strip (8) is connected to one side of a set of connecting copper plates (6). The inner soft copper strip (8) is connected to one side of the connecting copper plate (6) by bolts (9). An outer soft copper strip (10) is provided on one side of the inner soft copper strip (8). The outer soft copper strip (10) is connected to one side of the connecting copper plate (6) by fastening bolts (11).
2. The clamp according to claim 1, characterized in that: The connecting copper plate (6) is connected to one end of the left clamping arm (1) and the right clamping arm (2) via a terminal block (7).
3. The clamp according to claim 2, characterized in that: The size of the terminal (7) connected to the right clamp arm (2) on the right side is larger than the size of the terminal (7) connected to the left clamp arm (1).