Self-adjusting method for parallel opening wrench

Abstract

The present invention relates to the technical field of manual hardware tools, and in particular to a self-adjusting method for a parallel open-end wrench. The method comprises a fixed handle, wherein an upper wrench body is movably installed in the fixed handle, the front bottom of the fixed handle is connected to the movable handle via a first rivet, and a fixed jaw is installed on the front top of the fixed handle. The fixed jaw cooperates with the front end of the upper wrench body to clamp a workpiece, a pin is provided at the tail end of the upper wrench body, a locking sleeve installed in the fixed handle is provided on the middle part of the upper wrench body, a compression spring is provided on the outer side of the upper wrench body between the pin and the locking sleeve, and a locking structure is provided between the locking sleeve and the movable handle, and the locking structure is used to lock and maintain the position of the upper wrench body. The opening amount of the jaws can be adjusted quickly and efficiently during the entire operation process, and the locking structure can lock or release the upper wrench body, which is easy to operate and takes into account both the adjustment efficiency of the jaw size and the locking and maintaining function of the upper wrench body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of manual hardware tools, in particular to a self-adjusting method of parallel open wrench. BACKGROUND

[0002] At present, the open wrench on the market has a structure as disclosed in the patent application with publication number CN205888987U, which discloses a large open wrench comprising a handle body, fixed jaws and movable jaws, the handle body is provided with a rack, the movable jaws are provided with a spiral rotating wheel, the spiral rotating wheel is engaged with the rack, during use, the size of the jaw opening is adjusted by rotating the spiral rotating wheel, this adjustment mode has a slow moving speed of the movable jaws, low adjustment efficiency of the size of the jaw opening, and is troublesome to operate, and if the structure of the spiral rotating wheel engaged with the rack is not adopted, the jaw opening cannot be locked and maintained during clamping, and there is no good method to solve the above problems.

[0003] In summary, how to realize the quick adjustment and locking and maintaining of the jaw opening of the open wrench has become a technical problem to be solved in the industry. SUMMARY

[0004] The present application provides a self-adjusting method of parallel open wrench to make up for the deficiencies of the prior art, and solves the problem that the size adjustment of the jaw opening of the previous open wrench cannot take into account the efficiency and locking and maintaining.

[0005] The technical scheme adopted by the present application to solve the above technical problems is as follows:

[0006] A self-adjusting method of parallel open wrench, comprising a fixed handle, an upper wrench body movably installed in the fixed handle, a first rivet connecting the fixed handle and a movable handle at the bottom of the front end of the fixed handle, a fixed jaw installed at the top of the front end of the fixed handle, the fixed jaw cooperating with the front end of the upper wrench body for clamping workpieces, a pin shaft provided at the tail end of the upper wrench body, a locking sleeve installed in the fixed handle and sleeved on the middle part of the upper wrench body, a compression spring sleeved on the outside of the upper wrench body between the pin shaft and the locking sleeve, during use, the upper wrench body is pulled upward, the pin shaft compresses the compression spring, the opening between the upper wrench body and the fixed jaw is quickly opened, then the workpiece is placed between the opening, and the upper wrench body is released, the upper wrench body clamps the workpiece downward under the elastic force of the compression spring, achieving the purpose of quickly adjusting the opening amount.

[0007] A locking structure is provided between the locking sleeve and the movable handle, when the movable handle is pressed in the direction of the fixed handle, the movable handle drives the locking structure to lock the upper wrench body, realizing the locking and maintaining of the position of the upper wrench body, when the movable handle rotates outward, the locking structure releases the upper wrench body.

[0008] The locking structure comprises a pull rod, one end of the pull rod is connected with the movable handle through a second rivet, the other end of the pull rod is connected with the upper part of the cam through a rotating shaft, the lower part of the cam is connected with one side of the locking sleeve through a third rivet, the outer side of the lower part of the cam is provided with an arc-shaped ratchet, a locking block is movably arranged in the locking sleeve between the cam and the upper handle body, and the locking block is provided with a straight ratchet which is engaged with the arc-shaped ratchet.

[0009] When the movable handle is pressed towards the fixed handle, the movable handle drives the pull rod, the pull rod drives the cam, and the cam drives the locking block to move towards the upper handle body, so that the gap between the locking block and the upper handle body is gradually reduced, and the upper handle body is gradually locked.

[0010] The side of the connecting end of the pull rod and the cam is provided with a screw seat, an adjusting screw is threadedly arranged in the screw seat, and the adjusting screw is matched with the cam and is used for adjusting the locking force.

[0011] The lower part of the movable handle is connected with the front end of the unlocking switch through a fourth rivet and a torsion spring, and the side of the unlocking switch is provided with an unlocking protrusion matched with the fixed handle.

[0012] The movable handle is provided with a limiting protrusion matched with the unlocking switch.

[0013] When it is needed to be opened, the unlocking switch is pressed towards the fixed handle, the unlocking protrusion on the unlocking switch supports the fixed handle to rotate the movable handle outward, and the movable handle is opened under the action of the torsion spring, the movable handle drives the pull rod, the pull rod drives the cam, the cam drives the locking block to move away from the upper handle body, and the upper handle body is released.

[0014] The above scheme has the following beneficial effects:

[0015] The upper handle body is movably inserted into the fixed handle, the compression spring is arranged outside the upper handle body and located between the pin shaft and the locking sleeve, the opening amount between the upper handle body and the fixed jaw can be quickly adjusted by pulling the upper handle body upward, the workpiece is clamped under the action of the compression spring after the upper handle body is released, then the movable handle is pressed, the movable handle drives the locking structure to act, the position of the upper handle body can be locked, when it is needed to be opened, the movable handle is rotated outward, and the locking structure releases the upper handle body, the opening amount of the jaw is adjusted at a high speed in the whole operation process, the efficiency is high, the locking structure can lock or release the upper handle body, and the operation is simple, the adjustment efficiency of the jaw size and the locking and maintaining functions of the upper handle body are considered. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present application.

[0017] Figure 2It is a structural schematic diagram of the movable handle of the present invention.

[0018] Figure 3 This is a schematic structural diagram of the unlocking switch of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the connecting rod and cam parts of the present invention.

[0020] In the figure, 1. fixed handle, 2. upper pull body, 3. first rivet, 4. movable handle, 5. fixed jaw, 6. pin, 7. locking sleeve, 8. compression spring, 9. pull rod, 10. second rivet, 11. rotating shaft, 12. cam, 13. third rivet, 14. locking block, 15. screw seat, 16. adjusting screw, 17. fourth rivet, 18. torsion spring, 19. unlocking switch, 20. unlocking protrusion, 21. limiting protrusion. Specific implementation method:

[0021] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0022] like Figures 1-4 As shown, a self-adjusting method for a parallel open-end wrench comprises a fixed handle 1, an upper body 2 is movably installed in the fixed handle 1, the handle of the upper body 2 is movably inserted in the fixed handle 1, the front end head of the upper body 2 is bent and located outside the fixed handle 1, the front end bottom of the fixed handle 1 is connected to the movable handle 4 by a first rivet 3, a fixed jaw 5 is installed on the front end top of the fixed handle 1, the fixed jaw 5 cooperates with the front end bending part of the upper body 2 for clamping a workpiece, a pin 6 is provided at the tail end of the upper body 2, a locking sleeve 7 installed in the fixed handle 1 is provided in the middle of the upper body 2, and the upper portion between the pin 6 and the locking sleeve 7 is tightened. A compression spring 8 is provided on the outer side of the lever body 2. When in use, the upper lever body 2 is pulled upward, the pin shaft 6 compresses the compression spring 8, and the opening between the upper lever body 2 and the fixed jaw 5 is quickly opened. Then the workpiece is placed between the opening and the upper lever body 2 is released. The upper lever body 2 clamps the workpiece downward under the action of the elastic force of the compression spring 8, thereby achieving the purpose of quickly adjusting the opening amount; a locking structure is provided between the locking sleeve 7 and the movable handle 4. When the movable handle 4 is pressed toward the fixed handle 1, the movable handle 4 drives the locking structure to lock the upper lever body 2, thereby locking and maintaining the position of the upper lever body 2, so that when the movable handle 4 is rotated outward, the locking structure releases the upper lever body 2.

[0023] The locking structure comprises a pull rod 9, one end of the pull rod 9 is connected with the movable handle 4 through a second rivet 10, the other end of the pull rod 9 is connected with the upper part of a cam 12 through a rotating shaft 11, the lower part of the cam 12 is connected with one side of the locking sleeve 7 through a third rivet 13, the outer side of the lower part of the cam 12 is provided with an arc-shaped ratchet, a locking block 14 is movably arranged in the locking sleeve 7 between the cam 12 and the upper handle body 2, the locking block 14 is provided with a straight ratchet which is engaged with the arc-shaped ratchet, the locking block 14 is movable in the locking sleeve 7 between the cam 12 and the upper handle body 2, but will not fall off. When the movable handle 4 is pressed towards the fixed handle 1, the movable handle 4 drives the pull rod 9, the pull rod 9 drives the cam 12, and the cam 12 drives the locking block 14 to move towards the upper handle body 2, the gap between the locking block 14 and the upper handle body 2 is gradually reduced, and the upper handle body 2 is gradually locked, when the first rivet 3, the second rivet 10 and the third rivet 13 are located on the same straight line, the locking of the upper handle body 2 can be realized.

[0024] One side of the connecting end of the pull rod 9 and the cam 12 is provided with a screw seat 15, an adjusting screw 16 is screwedly arranged in the screw seat 15, the adjusting screw 16 is matched with the cam 12 and is used for adjusting the locking force, when the front end of the adjusting screw 16 is closer to the cam 12, the rotating angle of the cam 12 is smaller, the moving distance of the locking block 14 driven by the cam 12 is smaller, and the locking force is smaller, on the contrary, when the front end of the adjusting screw 16 is farther away from the cam 12, the rotating angle of the cam 12 is larger, the moving distance of the locking block 14 driven by the cam 12 is larger, and the locking force is larger.

[0025] The lower part of the movable handle 4 is connected with the front end of an unlocking switch 19 through a fourth rivet 17 and a torsion spring 18, the side part of the unlocking switch 19 is provided with an unlocking protrusion 20 which is matched with the fixed handle 1. When the unlocking switch 19 is pressed towards the fixed handle 1, the unlocking protrusion 20 supports the fixed handle 1 to rotate the movable handle 4 outward, so that the locking structure loosens the upper handle body 2. When it is needed to open, the unlocking switch 19 is pressed towards the fixed handle 1, the unlocking protrusion 20 on the unlocking switch 19 supports the fixed handle 1 to rotate the movable handle 4 outward, and the movable handle 4 is opened under the action of the torsion spring 18, the movable handle 4 drives the pull rod 9, the pull rod 9 drives the cam 12, the cam 12 drives the locking block 14 to move away from the upper handle body 2, and the upper handle body 2 is loosened.

[0026] The movable handle 4 is provided with a limiting protrusion 21 which is matched with the unlocking switch 19, the limiting protrusion 21 can limit the unlocking switch 19 in the movable handle 4, and prevents the unlocking switch 19 from being separated from the movable handle 4 under the action of the torsion spring 18.

[0027] Working principle:

[0028] In use, first pull up the upper handle body 2, the pin shaft 6 compresses the compression spring 8, the opening between the upper handle body 2 and the fixed jaw 5 can be quickly opened, then the workpiece is placed between the opening, then the upper handle body 2 is loosened, the upper handle body 2 is clamped down to the workpiece under the elastic force of the compression spring 8, the purpose of quickly adjusting the opening amount is realized; then press the movable handle 4 to the fixed handle 1 direction, the movable handle 4 drives the pull rod 9, the pull rod 9 drives the cam 12, the cam 12 drives the locking block 14 to close to the upper handle body 2, the gap between the locking block 14 and the upper handle body 2 is gradually reduced, the upper handle body 2 is gradually locked, when the first rivet 3, the second rivet 10 and the third rivet 13 are located on the same straight line, the locking of the upper handle body 2 can be realized, the movable handle 4 moves at the same time, the unlocking switch 19 moves to the fixed handle 1 direction, at this time the torsion spring 18 is compressed; when it is needed to be opened, only the unlocking switch 19 is pressed to the fixed handle 1 direction, the unlocking protrusion 20 on the unlocking switch 19 supports the fixed handle 1 to make the movable handle 4 rotate outward, at the same time the movable handle 4 is opened under the elastic force of the torsion spring 18, the movable handle 4 drives the pull rod 9, the pull rod 9 drives the cam 12, the cam 12 drives the locking block 14 to separate from the upper handle body 2, the upper handle body 2 is loosened, so that the locking and loosening functions of the upper handle body 2 are realized, finally the locking and holding functions of the workpiece clamping are realized.

[0029] The above specific embodiment cannot be regarded as the limitation of the protection scope of the present application, any alternative improvement or change made by the person skilled in the art to the embodiment of the present application falls within the protection scope of the present application.

[0030] The part not described in the present application is the known technology of the person skilled in the art.

Claims

1. A self-adjusting method for a parallel open-end wrench, characterized in that: The tool is adapted to engage the workpiece when the tool is engaged, and the tool is adapted to engage with the movable handle when the tool is engaged. The tool is adapted to engage with the movable handle when the tool is engaged, and the tool is adapted to engage with the movable handle when the tool is engaged. A locking structure is provided between the locking sleeve and the movable handle, and when the movable handle is pressed toward the fixed handle, the movable handle drives the locking structure to lock the upper pull body, so that the position of the upper pull body is locked and maintained, so that when the movable handle is rotated outward, the locking structure loosens the upper pull body; the locking structure includes a pull rod, one end of the pull rod is connected to the movable handle through a second rivet, the other end of the pull rod is connected to the upper part of the cam through a rotating shaft, the lower part of the cam is connected to one side of the locking sleeve through a third rivet, an arc-shaped ratchet is provided on the outer side of the lower part of the cam, and a locking block is movably installed in the locking sleeve between the cam and the upper pull body, and the locking block is provided with straight ratchet teeth that mesh with the arc-shaped ratchet teeth; When the movable handle is pressed toward the fixed handle, the movable handle drives the pull rod, the pull rod drives the cam, and the cam drives the locking block to approach the upper pull body, gradually reducing the gap between the locking block and the upper pull body, and gradually locking the upper pull body. When the first rivet, the second rivet, and the third rivet are in the same straight line, the upper pull body can be locked and maintained.

2. The self-adjusting method of a parallel open-end wrench according to claim 1, characterized in that: A screw seat is provided on one side of the connecting end of the pull rod and the cam, and an adjusting screw is installed on the inner thread of the screw seat. The adjusting screw cooperates with the cam to adjust the locking force.

3. The self-adjusting method of a parallel open-end wrench according to claim 1, characterized in that: The lower part of the movable handle is connected to the front end of the unlocking switch through a fourth rivet and a torsion spring, and the side of the unlocking switch is provided with an unlocking protrusion that cooperates with the fixed handle.

4. The self-adjusting method of a parallel open-end wrench according to claim 3, characterized in that: The movable handle is provided with a limiting protrusion which matches the unlocking switch.

5. The self-adjusting method of a parallel open-end wrench according to claim 3, characterized in that: When it needs to be opened, press the unlocking switch in the direction of the fixed handle. The unlocking protrusion on the unlocking switch will support the fixed handle to rotate the movable handle outward. At the same time, the movable handle is opened under the action of the torsion spring force. The movable handle drives the pull rod, the pull rod drives the cam, and the cam drives the locking block to separate from the upper pull body, thereby loosening the upper pull body.

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