CN203164216U - Handcart switch loop resistance test opening unilateral type cable clamp - Google Patents

Abstract

The utility model discloses a unilateral wire clamp with an opening for testing the circuit resistance of a handcart switch, which comprises three parts: a long straight test arm, a bow-shaped fastening arm and a handle. The reverse extension of the handle is the handle, the long straight test arm is a conductor, the bow-shaped fastening arm is an insulator, and an insulating layer is wrapped on the reverse extension, and the end of the bow-shaped fastening arm faces the long straight test arm to realize clamping. Tight, there is a spring between the long straight test arm and the reverse extension of the bow-shaped fastening arm, one end of the spring is connected to the reverse extension of the long straight test arm, and the other end of the spring is connected to the reverse extension of the bow-shaped fastening arm To the extension, a terminal is provided on the long straight test arm. The utility model has the advantages of being able to go over the plum blossom contact finger of the handcart switch and directly contact with the conductive tube of the handcart switch, improve the accuracy of loop resistance measurement, reduce the number of tests and test errors, and improve the test efficiency.

Description

Handcart switch circuit resistance test opening single-sided clamp

technical field

The utility model relates to a wire clip, in particular to a single-sided wire clip with an opening for testing the circuit resistance of a handcart switch.

Background technique

The currently used handcart switch loop resistance test clamp can only be clamped at the contact finger of the handcart switch plum blossom, and the tightness between the handcart switch plum blossom contact finger and the conductive tube of the handcart switch makes each measurement value different from the actual resistance. There are large errors in the values, and the average value of multiple measurements also has obvious errors from the actual resistance value.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the prior art, and provide a handcart switch through the plum blossom contact finger, quickly and accurately test the circuit resistance of the handcart switch, reduce the test error of the circuit resistance of the handcart switch, improve Loop Resistance Measuring Efficiency Handcart Switch Loop Resistance Test Rivet Type Clamp.

A handcart switch circuit resistance test opening unilateral clamp, the key points of its structure are: it includes three parts: a long straight test arm, a bow-shaped fastening arm, and a handle. The long straight test arm and the bow-shaped fastening arm are hinged on Together, the reverse extension of the long straight test arm and the bow-shaped fastening arm is a handle, the long straight test arm is an electrical conductor, and the bow-shaped fastening arm is an insulator. The extension part is wrapped with an insulating layer, and the end of the bow-shaped fastening arm is clamped against the long straight test arm. A spring is arranged between the long straight test arm and the reverse extension of the bow-shaped fastening arm, and one end of the spring is Connected to the reverse extension of the long straight test arm, the other end of the spring is connected to the reverse extension of the bow-shaped fastening arm, and the long straight test arm is provided with a terminal.

When in use, connect the current line and potential sampling line of the loop resistance tester to the terminal of the long straight test arm, hold the handle tightly to separate the long straight test arm from the bow-shaped fastening arm, and extend the long straight test arm into the handcart switch The inner wall of the copper tube of the conductive tube is in direct contact with the inner wall. At the same time, the bow-shaped fastening arm crosses the plum blossom contact finger, and the handle is released to fasten the bow-shaped fastening arm and the long straight test arm. The loop resistance test can be accurately performed by using the loop resistance tester.

The connecting terminal arranged on the long straight test arm is close to the hinge point of the long straight test arm.

A rubber pad is arranged on the end fastening surface of the bow-shaped fastening arm.

A rubber pad is provided on the fastening surface of the bow-shaped fastening arm and the long straight test arm for clamping the loop resistance tester, which can improve the friction system, increase the clamping force, and reduce the damage to the loop resistance tester at the same time.

Friction lines are provided on the clamping surface of the long straight test arm. `` ``

There are friction lines on the surface of the long straight test arm used to contact the loop resistance tester, which can avoid slipping and improve the clamping force.

The friction lines are either directly arranged on the surface of the long straight test arm, or are metal sheets with lines on the surface connected with one piece.

The terminal is composed of a screw and a nut, the bottom of the screw is fixed on the long straight test arm, and the nut is detachable.

In summary, the utility model has the following advantages compared with the prior art:

The handcart switch circuit resistance test opening unilateral clamp has a contact finger that can go over the handcart switch plum blossom, directly contact with the handcart switch conductive tube, improve the accuracy of loop resistance measurement, reduce the number of tests and test errors, and improve test efficiency. The advantages.

Description of drawings

Figure 1 is a schematic diagram of the structure of a single-sided clamp with an opening for the resistance test of the switch circuit of the handcart.

Figure 2 is a schematic diagram of the operation of the single-sided clamp with the opening of the switch circuit resistance test of the handcart.

Explanation of symbols 1 Long straight test arm 2 Bow-shaped fastening arm 3 Handle 4 Pressure spring 5 Wiring head 6 Handcart switch conductive tube 7 Torx contact finger.

Detailed ways

Below in conjunction with embodiment the utility model is described in more detail.

Example 1

A handcart switch circuit resistance test opening unilateral clamp, including three parts: a long straight test arm 1, a bow-shaped fastening arm 2, and a handle 3. The long straight test arm and the bow-shaped fastening arm are hinged together. The reverse extension of the long straight test arm and the bow-shaped fastening arm is a handle, the long straight test arm is an electrical conductor, and the bow-shaped fastening arm is an insulator, and the reverse extension of the long straight test arm and the bow-shaped fastening arm It is wrapped with an insulating layer, and the end of the bow-shaped fastening arm faces the long straight test arm to achieve clamping. A spring is arranged between the long straight test arm and the reverse extension of the bow-shaped fastening arm, and one end of the spring is connected to the The opposite extension of the long straight test arm, the other end of the spring is connected to the reverse extension of the bow-shaped fastening arm, and a terminal is arranged on the long straight test arm. The total length of the long straight test arm is 100mm, and the friction pattern on the long straight test wall is that a metal sheet with a texture on the surface is arranged on the clamping surface of the long straight test wall. The material of the metal sheet is copper, and the size of the metal sheet is 30x15mm. A terminal 5 that can be flexibly connected to the current line and potential sampling line of the loop resistance tester is arranged near the hinge point of the long straight test arm. The bow-shaped fastening arm is made of insulating material, the height of the bow is about 70 mm, the length of the upper horizontal part of the bow is about 80 mm, and the fastening surface is a rubber pad. The handle 3 is made of steel and its surface is covered with an insulating layer, and a compression spring 4 is installed inside the handle.

When in use, connect the current line and potential sampling line of the loop resistance tester to the terminal of the long straight test arm, hold the handle tightly to separate the long straight test arm from the bow-shaped fastening arm, and extend the long straight test arm into the handcart switch The inner wall of the conductive tube 6 copper tube is in direct contact with the inner wall. At the same time, the bow-shaped fastening arm crosses the plum blossom contact finger 7. Loosen the handle to fasten the bow-shaped fastening arm and the long straight test arm. The loop resistance can be accurately measured by using the loop resistance tester. test.

The parts not described in this embodiment are the same as the prior art.

Claims (6)

1. a wheelbarrow switch loop resistance is tested opening single side type wire clamp, it is characterized in that: include long straight test arm, arc fastening arm, handle three parts, described length directly tests arm and arc fastening arm is hinged, the reverse extension of long straight test arm and arc fastening arm is handle, it is electric conductor that described length is directly tested arm, arc fastening arm is insulator, reverse extension at long straight test arm and arc fastening arm is enclosed with insulation course, the not end of arc fastening arm clamps with realization facing to long straight test arm, between the reverse extension of long straight test arm and arc fastening arm, be provided with spring, one end of spring is connected in the reverse extension of long straight test arm, the other end of spring is connected in the reverse extension of arc fastening arm, and long straight test arm is provided with connection terminal.

2. wheelbarrow switch loop resistance according to claim 1 is tested opening single side type wire clamp, it is characterized in that: near the pin joint of connection terminal for close long straight test arm that long straight test arm arranges.

3. wheelbarrow switch loop resistance according to claim 2 is tested opening single side type wire clamp, and it is characterized in that: fastening of not end at arc fastening arm arranges rubber blanket.

4. wheelbarrow switch loop resistance according to claim 3 is tested opening single side type wire clamp, it is characterized in that: the clamping surface of long straight test arm is provided with the friction line.

5. wheelbarrow switch loop resistance according to claim 4 test opening single side type wire clamp is characterized in that: described friction line or for directly arranging on the surface of long straight test arm, or have the sheet metal of lines for the surface that is connected with a slice on its surface.

6. wheelbarrow switch loop resistance according to claim 5 is tested opening single side type wire clamp, and it is characterized in that: described terminals are made up of screw rod and nut, and the screw rod bottom is fixed on the long straight test arm, and nut is detachable.

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