Voltage-resistant torque wrench

Abstract

A voltage-resistant torque wrench includes a tube body with a torque control mechanism inside. The torque control mechanism has a transmission rod that can swing relative to the tube body. The transmission rod is connected to a working head. The tube body is covered with a first insulating layer with a mounting portion. The working head is covered with a second insulating layer with a sleeve portion extending from the mounting portion. A soft insulating ring is provided between the sleeve portion and the mounting portion. This provides excellent insulation and voltage resistance without affecting the swing of the transmission rod and the working head, preventing electric shock to the user.

Description

Technical Field

[0001] This invention relates to a torque wrench, and more particularly to a voltage-resistant torque wrench for use in live environments. Prior Technology

[0002] A conventional torque wrench mainly consists of a tube with a working head at one end and a handle at the other end. A torque control mechanism is also located within the tube, comprising a transmission rod that can deflect relative to the tube. One end of the transmission rod is connected to the working head, and the other end has a release unit. This release unit is pushed by an elastic element and has a set value. When the user operates the conventional torque wrench, if the force reaches the set value, the release unit will release, causing the transmission rod and working head to deflect and produce an audible sound, thus reminding the user to stop operating.

[0003] However, since conventional torque wrenches are usually made of metal, which is a good conductor, when a user operates the conventional torque wrench in a live environment, the current can be conducted to the user through the conventional torque wrench, which can easily cause electric shock. In view of this, the outer surface of the conventional torque wrench can be further covered with a soft plastic or a hard plastic. However, the voltage resistance of the soft plastic is poor, and it can still be broken down by current in a high voltage environment, which is dangerous. Although the hard plastic has better voltage resistance, it does not have the ability to deform. Therefore, the transmission rod and the working head cannot swing smoothly, so the release unit cannot be released. The user must use more force to operate it, causing the output torque to exceed the set value too much. Summary of the Invention

[0004] The purpose of this invention is to provide a voltage-resistant torque wrench that provides superior insulation and voltage resistance without affecting the swing of the transmission rod and the working head.

[0005] To achieve the above objectives, the present invention provides a voltage-resistant torque wrench comprising a tube having a first end and a second end opposite to the first end. The outer surface of the tube is covered with a first insulating layer made of a first rigid insulating material. The first insulating layer has a mounting portion opposite the first end. Furthermore, a torque control mechanism is provided within the tube. This torque control mechanism consists of a transmission rod, a release unit, and an elastic element sequentially arranged from the first end toward the second end. The transmission rod is pivotally mounted at the first end via a pivot shaft and can... The pivot shaft swings relative to the tube body. The transmission rod is also connected to a working head, which is located outside the first end. The outer surface of the working head is covered with a second insulating layer, which is made of a second rigid insulating material. The second insulating layer extends into a sleeve, which is fitted around the setting part. A gap is maintained between the sleeve and the setting part. In addition, a soft insulating ring is included, which is disposed between the sleeve and the setting part and seals the gap. The soft insulating ring is made of a soft insulating material and has deformability.

[0006] The voltage-resistant torque wrench provided by this invention maintains a gap between the sleeve portion and the mounting portion, and the soft insulating ring has deformability. Therefore, when the voltage-resistant torque wrench jumps out, the working head can smoothly swing with the transmission rod without hindering the rotation of the working head and the transmission rod. Furthermore, during the rotation of the working head with the transmission rod, because the sleeve portion is fitted around the mounting portion, the first insulating layer and the second insulating layer partially overlap. This ensures that the voltage-resistant torque wrench is continuously covered by the first insulating layer and the second insulating layer during operation, effectively preventing current breakdown and providing high safety. Simple Explanation of the Diagram

[0007] Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is a cross-sectional view of a preferred embodiment of the present invention. Figure 3 is a partial exploded view of a preferred embodiment of the present invention. Figure 4 is a cross-sectional view of a preferred embodiment of the present invention, showing a soft insulating ring pressed against a sealing portion. Figure 5 is a cross-sectional view of the soft insulating ring of the preferred embodiment of the present invention when it leaves the sealing part. Figure 6 is a schematic diagram illustrating the use of a preferred embodiment of the present invention. Implementation

[0008] Please refer to Figures 1 and 2, which are perspective and cross-sectional views of a preferred embodiment of the present invention, revealing a voltage-resistant torque wrench 100. The voltage-resistant torque wrench 100 can have various different forms. This embodiment takes a jump-out torque wrench as an example. The voltage-resistant torque wrench 100 includes a tube body 10, which has a first end 11 and a second end 12 disposed opposite to the first end 11. At the same time, a torque control mechanism 20 is provided inside the tube body 10. The torque control mechanism 20 is provided with a transmission rod 21, a jump-out unit 22 and an elastic element 23 sequentially arranged from the first end 11 toward the second end 12. At the same time, a working head 30 is provided outside the first end 11. The working head 30 can be connected to the transmission rod 21 in an integral connection or a separate connection. This embodiment takes a separate connection as an example.

[0009] Please refer to Figure 2. The tube 10 has a first shaft hole 13 near the first end 11. The transmission rod 21 is located near the first end 11 and has a corresponding second shaft hole 211. It also includes a pivot shaft 24, which passes through the first shaft hole 13 and the second shaft hole 211. This allows the transmission rod 21 to be pivotally mounted at the first end 11 via the pivot shaft 24, with the pivot shaft 24 as its axis relative to the tube. The body 10 swings. In addition, the transmission rod 21 has a connecting groove 212 at one end facing the outside of the tube body 10, and a positioning hole 213 is provided laterally on the inner wall of the connecting groove 212. The working head 30 has a connecting post 31, and the connecting post 31 has an elastic positioning member 32 corresponding to the positioning hole 213. When the connecting post 31 passes through the connecting groove 212, the elastic positioning member 32 is positioned in the positioning hole 213, so that the working head 30 can be stably connected to the transmission rod 21.

[0010] Please refer to Figure 2. The elastic element 23 pushes the release unit 22 against the swing rod with elastic force. At the other end of the transmission rod 21, the release unit 22 has a preset torque value. When the force applied to the voltage-resistant torque wrench 100 exceeds the preset torque value, the release unit 22 will release, causing the transmission rod 21 to wobble. Preferably, the torque control mechanism 20 may further include an adjustment unit 25, which is connected to the elastic member 23 and can be used to adjust the elastic force of the elastic member 23 to change the preset torque value. Regarding the release unit 23...

[22] The operation and principle of the adjustment unit 25 are known technologies and will not be described in detail here. However, it must be stated that the voltage-resistant torque wrench 100 can be designed with a certain torque and the adjustment unit 25 can be omitted. That is, the adjustment unit 25 is not a necessary component for implementing the present invention.

[0011] Please refer to Figures 3 and 4. The outer surface of the tube 10 is covered with a first insulating layer 14, which is made of a first rigid insulating material. The outer surface of the working head 30 is covered with a second insulating layer 33, which is made of a second rigid insulating material. The first insulating layer 14 and the second insulating layer 33 can be made of the same or different materials. Preferably, the first insulating layer 14 and the second insulating layer 33 can be made of the same polypropylene (PP), acrylonitrile butadiene styrene (ABS), or polyoxymethylene (POM). Made of POM (polypropylene oxide), it is characterized by its hardness, voltage resistance, and impact resistance. Furthermore, the first insulating layer 14 has a mounting portion 141 corresponding to the first end 11, and the second insulating layer 33 extends around the connecting post 31 with a sleeve portion 331. When the working head 30 is connected to the transmission rod 21, the sleeve portion 331 is fitted around the mounting portion 141, and a gap S is maintained between the sleeve portion 331 and the mounting portion 141. It also includes a soft insulating ring 40, which is disposed between the sleeve portion 331 and the mounting portion 141 and seals the gap S. The soft insulating ring 40 is made of a soft insulating material and has deformability, such as thermoplastic rubber (TPR), silicone, polyvinyl chloride (PVC), or thermoplastic polyurethane (TPR). In this embodiment, the soft insulating ring 40 is located between the pivot shaft 24 and the second end 12, and the soft insulating ring 40 is connected to the sleeve portion 331 and can move with the working head 30. The end of the sleeve portion 331 is provided with a protruding ring 332, and one side of the soft insulating ring 40 is provided with an annular groove 41 corresponding to the protruding ring 332. The protruding ring 332 is connected to the annular groove 41, so that the soft insulating ring 40 is connected to the sleeve portion 331. Preferably, the soft insulating ring 40 is connected to the sleeve portion 331 by a coating injection technique, which not only has a better bonding effect, but also significantly reduces production costs.

[0012] Please refer to Figure 5, and in conjunction with Figure 4, the first insulating layer 14 has a sealing portion 142 protruding around the tube body 10 near the setting portion 141. The sealing portion 142 has a beveled portion 143 with a diameter gradually increasing from the first end 11 towards the second end 12 on one side of the first end 11. On the other side of the sealing portion 142, a stop portion 144 with a diameter larger than the sealing portion 142 protrudes. The diameter D1 of the sealing portion 142 is larger than the inner diameter D2 of the soft insulating ring 40. Thus, when the working head 30 is connected to the transmission rod 21, the beveled portion 143 guides the soft insulating ring 40 up the sealing portion 142, causing the soft insulating ring 40 to be stretched open by the sealing portion 142 and possess an inwardly contracting restoring force. This allows the inner ring surface of the soft insulating ring 40 to be tightly pressed against the sealing portion 142, further improving the sealing effect.

[0013] Please refer to Figure 6. When a user operates the voltage-resistant torque wrench 100 in a live environment, the outer surface of the tube 10 is covered with the first insulating layer 14, which is made of a first rigid insulating material, and the outer surface of the working head 30 is covered with the second insulating layer 33, which is made of a second rigid insulating material. Therefore, it can provide excellent insulation and voltage resistance, ensuring that the user will not be electrocuted. When the voltage-resistant torque wrench 100 is disengaged due to the force exceeding the preset torque value, the gap is maintained between the sleeve portion 331 and the mounting portion 141. S, and the soft insulating ring 40 are made of the soft insulating material and have deformability. Therefore, the working head 30 can swing smoothly with the transmission rod 21 without hindering the rotation of the working head 30 and the transmission rod 21. At the same time, during the rotation of the working head 30 with the transmission rod 21, because the sleeve part 331 is sleeved on the periphery of the setting part 141, the first insulating layer 14 and the second insulating layer 33 partially overlap. Therefore, it can be ensured that the voltage-resistant torque wrench 100 is continuously covered by the first insulating layer 14 and the second insulating layer 33 during operation, which can effectively prevent current breakdown and leakage, and has a high safety.

[0014] In summary, this invention has excellent progressiveness and practicality compared to similar products. Furthermore, a thorough review of domestic and international technical data on this type of structure has revealed no prior examples of the same construction. Therefore, this invention meets the requirements for a patent and is hereby applied for.

[0015] However, the above description is only one preferred embodiment of the present invention. Therefore, any equivalent structural changes made by applying the present invention specification and the claims should be included within the scope of the present invention.

[0016] 100: Voltage-resistant torque wrench 10: Pipe body 11: First end 12: Second end 13: First shaft hole 14: First insulating layer 141: Setup Department 142: Sealing part 143: Bevel face 144: Stopping part 20: Torque control mechanism 21: Transmission rod 211: Second shaft hole 212: Connecting slot 213: Positioning hole 22: Breakout Unit 23: Elastic component 24: Pivot joint 25: Adjustment Unit 30: Working head 31: Connecting column 32: Elastic positioning element 33: Second insulating layer 331: Casing Section 332:Protruding ring 40: Soft insulating ring 41: Annular groove S: Gap D1: Diameter D2:Inner diameter

Claims

1. A voltage-resistant torque wrench, comprising: a tube having a first end and a second end disposed opposite the first end, wherein the outer surface of the tube is covered with a first insulating layer made of a first rigid insulating material, and the first insulating layer has a mounting portion opposite the first end; a torque control mechanism disposed within the tube, and wherein a transmission rod, a release unit, and an elastic element are sequentially disposed from the first end toward the second end, wherein... The transmission rod is pivotally mounted at the first end via a pivot shaft and can swing relative to the tube body with the pivot shaft as the axis; a working head is disposed outside the first end and connected to the transmission rod, and the outer surface of the working head is covered with a second insulating layer, which is made of a second rigid insulating material. The second insulating layer extends into a sleeve portion, which is fitted around the periphery of the mounting portion, and a gap is maintained between the sleeve portion and the mounting portion; a soft insulating ring is disposed between the sleeve portion and the mounting portion and seals the gap, wherein the soft insulating ring is made of a soft insulating material and has deformability.

2. The voltage-resistant torque wrench as described in claim 1, wherein, The soft insulating ring is connected to the sleeve and can move with the working head.

3. The voltage-resistant torque wrench as described in claim 2, wherein, The end of the sleeve is provided with a protruding ring, and one side of the soft insulating ring is provided with an annular groove corresponding to the protruding ring. The protruding ring is inserted and connected to the annular groove, so that the soft insulating ring is connected to the sleeve.

4. The voltage-resistant torque wrench as described in claim 2, wherein, The soft insulating ring is connected to the sleeve using an injection molding technique.

5. The voltage-resistant torque wrench as described in claim 1, wherein, The soft insulating ring is located between the pivot shaft and the second end.

6. The voltage-resistant torque wrench as described in claim 1, wherein, The first insulating layer has a sealing portion protruding around the tube body near the setting part, and the inner ring surface of the soft insulating ring is pressed against the sealing portion.

7. The voltage-resistant torque wrench as described in claim 6, wherein, The diameter of the sealing part is larger than the inner diameter of the soft insulating ring, so that the soft insulating ring is stretched open by the sealing part and has a restoring force that contracts inward.

8. The voltage-resistant torque wrench as described in claim 6, wherein, The sealing part has a beveled portion with a diameter that gradually increases from the first end toward the second end on one side corresponding to the first end.

9. The voltage-resistant torque wrench as described in claim 6, wherein, On the other side of the sealing part, there is a protruding stop part with a diameter larger than that of the sealing part.

10. The voltage-resistant torque wrench as described in claim 1, wherein, The first rigid insulating material and the second rigid insulating material are polypropylene (PP), while the flexible insulating material is thermoplastic rubber (TPR).

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