A pair of bolt cutters with a protective locking device

Abstract

This utility model relates to the field of manual hardware tools, and more particularly to a pair of bolt clamps with a protective locking device. It includes a fixed jaw, a movable jaw, a fixed handle, and a movable handle. The movable jaw is connected to the fixed handle via rivet A, and the movable jaw is connected to the movable handle via rivet B. An adjusting screw contacts the rear end of a support plate, and the front end of the support plate is connected to the movable handle via rivet C. A tension spring is provided between the middle of the fixed handle and the movable jaw. A safety switch is located inside the movable handle near the front end of the support plate, and a damping spring is provided between the side of the safety switch and the side wall of the movable handle. The safety switch and the damping spring are connected to the movable handle via rivet E. When clamping a workpiece, once the notch of the safety switch contacts the front end of the support plate, the safety switch locks the bolt clamps. The bolt clamps cannot be opened by opening the handle or by any other means, ensuring safety and preventing accidental opening of the bolt clamps, thus eliminating safety hazards.

Description

Technical fields:

[0001] This utility model relates to the field of manual hardware tools, and in particular to a pair of bolt cutters with a protective locking device. Background technology:

[0002] Traditional bolt clamps, such as the patent application CN209599144U entitled "A Bolt Clamp Pliers with Ratchet Wrench Function," consist of a fixed jaw, a fixed handle, a movable jaw, a movable handle, a support plate, an opening handle, an adjusting bolt, a tension spring, and rivets. The fixed jaw and fixed handle are welded together. The movable jaw is connected to both the fixed and movable handles via rivets. The adjusting bolt is located at the end of the fixed handle. One end of the support plate is connected to the movable handle via a rivet, and the other end contacts the head of the adjusting bolt. The opening handle is connected to the movable handle via a rivet. The tension spring is hooked at both ends to the movable jaw and the fixed handle, respectively. When the movable handle is pressed, it uses one end of the support plate as a fulcrum to move the movable jaw, causing it to rotate and engage with the fixed jaw to clamp the workpiece. This traditional bolt clamp structure lacks any locking or protective mechanism. Accidental activation of the opening handle can cause the bolt clamp to open unintentionally. If a workpiece is clamped at a height, the bolt clamp and the workpiece could fall, posing a significant safety hazard.

[0003] In conclusion, how to achieve locking protection for bolt cutters has become a technical challenge that urgently needs to be solved in the industry. Utility model content:

[0004] To overcome the shortcomings of the prior art, this utility model provides a pair of bolt cutters with a protective locking device, which solves the problem that the bolt cutters of the past lacked a locking and protective structure and were easily opened by accident, posing a safety hazard.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A pair of bolt cutters with a safety lock includes a fixed jaw, a movable jaw, a fixed handle, and a movable handle. The fixed jaw and the fixed handle are welded together. The movable jaw is connected to the fixed handle via rivet A, and the movable jaw is connected to the movable handle via rivet B. An adjusting screw is provided at the rear end of the fixed handle, and the adjusting screw contacts the rear end of a support plate. The front end of the support plate is connected to the movable handle via rivet C. A tension spring is provided between the middle of the fixed handle and the movable jaw. The middle of the movable handle is connected to the opening handle via rivet D. A safety switch is provided inside the movable handle near the front end of the support plate. The top of the safety switch contacts the front end of the support plate to lock the support plate. A damping spring is provided between the side of the safety switch and the side wall of the movable handle. The safety switch and the damping spring are connected to the movable handle via rivet E.

[0007] The safety switch has a notch at the top that matches the front end of the support plate.

[0008] The safety switch has an arc-shaped boss on its side that cooperates with the damping spring.

[0009] The bottom of the safety switch has anti-slip texture.

[0010] The damping spring is used to create resistance to the rotation of the safety switch.

[0011] The present invention adopts the above solution and has the following beneficial effects:

[0012] A safety switch is located inside the movable handle near the front end of the support plate. When clamping a workpiece, the safety switch notch contacts the front end of the support plate, locking the clamp. The clamp cannot be opened by opening the handle or by any other means, ensuring safety and preventing accidental opening of the clamp, thus eliminating safety hazards. After clamping, the safety switch is rotated to disengage from the front end of the support plate, freeing the support plate from restriction. Then, the clamp can be opened by opening the handle, releasing the workpiece. Attached image description:

[0013] Figure 1 This is a schematic diagram of the locked state structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the unlocked state structure of this utility model.

[0015] Figure 3 This is a three-dimensional structural diagram of the cooperation between the support plate and the safety switch of this utility model.

[0016] Figure 4 This is a schematic diagram of the damping compression spring of this utility model.

[0017] In the diagram, 1. Fixed jaws, 2. Movable jaws, 3. Fixed handle, 4. Movable handle, 5. Rivet A, 6. Rivet B, 7. Adjusting screw, 8. Support plate, 9. Rivet C, 10. Tension spring, 11. Rivet D, 12. Opening handle, 13. Safety switch, 14. Damping spring, 15. Rivet E, 16. Notch, 17. Arc-shaped boss, 18. Anti-slip texture. Detailed implementation method:

[0018] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0019] like Figure 1-4As shown, a pair of bolt cutters with a protective locking device includes a fixed jaw 1, a movable jaw 2, a fixed handle 3, and a movable handle 4. The fixed jaw 1 and the fixed handle 3 are welded together. The movable jaw 2 is connected to the fixed handle 3 by rivet A5 and to the movable handle 4 by rivet B6. An adjusting screw 7 is provided at the rear end of the fixed handle 3, and the adjusting screw 7 contacts the rear end of a support plate 8. The front end of the support plate 8 is connected to the movable handle 4 by rivet C9. The middle part of the fixed handle 3 is between the fixed handle 3 and the movable jaw 2. A tension spring 10 is provided. The middle part of the movable handle 3 is connected to the opening handle 12 by a rivet D11. A safety switch 13 is provided inside the movable handle 4 near the front end of the support plate 8. The top of the safety switch 13 contacts the front end of the support plate 8 to lock the support plate 8. A damping spring 14 is provided between the side of the safety switch 13 and the side wall of the movable handle 4. A rivet E15 passes through the through hole on the safety switch 13 and the center hole of the damping spring 14 to connect the safety switch 13 and the damping spring 14 to the movable handle 4.

[0020] The top of the safety switch 13 is provided with a notch 16 that matches the front end of the support plate 8. The shape of the notch 16 matches the shape of the front end of the support plate 8, which makes the top of the safety switch 13 contact the front end of the support plate 8 more tightly and stably, preventing slippage.

[0021] The safety switch 13 has an arc-shaped boss 17 on its side that cooperates with the damping spring 14. When installing the safety switch 13 and the damping spring 14 into the movable handle 4, the damping spring 14 can be pressed tightly on the safety switch 13 near the arc-shaped boss 17 first. Under the action of the arc-shaped boss 17, the damping spring 14 and the safety switch 13 are pushed into the movable handle 4 together. Then, the rivet E15 is passed through the through hole on the movable handle 4, the safety switch 13 and the damping spring 14. Finally, the two ends of the rivet E15 are pressed to complete the installation.

[0022] The bottom of the safety switch 13 is provided with anti-slip texture 18, which can prevent slipping when the safety switch 13 is rotated.

[0023] The damping spring 14 is used to resist the rotation of the safety switch 13. The safety switch 13 can only rotate under the action of external force, ensuring stability and reliability when locked, and preventing the safety switch 13 from rotating and disengaging from the front end of the support plate 8 when it is not subjected to external force, which would lead to locking failure.

[0024] Working principle:

[0025] When clamping a workpiece, first push the anti-slip texture 18 to rotate the safety switch 13 to the locked position, then grip the movable handle 4 to close the support plate 8. When the tail of the support plate 8, rivet C9, and rivet B6 are in a straight line, the front end of the support plate 8 is in contact with the notch 16 of the safety switch 13. The front end of the support plate 8 cannot continue to move downward. At this time, the safety switch 13 can lock the clamp. The clamp cannot be opened by opening the handle 12, which can prevent the clamp from being opened due to accidental contact and eliminate safety hazards.

[0026] When the clamping work is completed and the locking needs to be released, first push the anti-slip texture 18 to drive the safety switch 13 to rotate in the opposite direction, so that the notch 16 of the safety switch 13 is disengaged from the front end of the support plate 8. At this time, the safety switch 13 is open, and the front end of the support plate 8 is no longer restricted by the safety switch 13. By opening the handle 12, the support plate 8 is lifted up, so that the tail of the support plate 8, rivet C9, and rivet B6 are no longer in the same straight line. Under the reset action of the tension spring 10, the clamp is unlocked and the workpiece is released.

[0027] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0028] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A pair of bolt cutters with a protective locking device, comprising a fixed jaw, a movable jaw, a fixed handle, and a movable handle, wherein the fixed jaw and the fixed handle are welded together, the movable jaw is connected to the fixed handle via rivet A, the movable jaw is connected to the movable handle via rivet B, an adjusting screw is provided at the rear end of the fixed handle, the adjusting screw contacts the rear end of a support plate, the front end of the support plate is connected to the movable handle via rivet C, a tension spring is provided between the middle of the fixed handle and the movable jaw, and the middle of the movable handle is connected to the opening handle via rivet D, characterized in that: A safety switch is located inside the movable handle near the front end of the support plate. The top of the safety switch contacts the front end of the support plate to lock the support plate. A damping spring is located between the side of the safety switch and the side wall of the movable handle. The safety switch and the damping spring are connected to the movable handle by rivets E.

2. The bolt cutters with a protective locking device according to claim 1, characterized in that: The safety switch has a notch at the top that matches the front end of the support plate.

3. The bolt cutters with a protective locking device according to claim 1, characterized in that: The safety switch has an arc-shaped boss on its side that cooperates with the damping spring.

4. The bolt cutters with a protective locking device according to claim 1, characterized in that: The bottom of the safety switch has anti-slip texture.

5. A pair of bolt cutters with a protective locking device according to claim 1, characterized in that: The damping spring is used to create resistance to the rotation of the safety switch.

Images