Parallel open spanner with self-adjusting function

Abstract

The utility model relates to the technical field of manual hardware tools, in particular to a parallel open spanner with a self-adjusting function. Comprising a fixed handle, an upper wrench body is movably installed in the fixed handle, the bottom of the front end of the fixed handle is connected with a movable handle through a first rivet, a fixed jaw is installed on the top of the front end of the fixed handle, the fixed jaw is matched with the front end of the upper wrench body to be used for clamping a workpiece, and a pin shaft is arranged at the tail end of the upper wrench body. The middle of the upper wrench body is sleeved with a locking sleeve installed in the fixed handle, the portion, between the pin shaft and the locking sleeve, of the outer side of the upper wrench body is sleeved with a compressed spring, a locking structure is arranged between the locking sleeve and the movable handle, and the locking structure is used for locking and keeping the position of the upper wrench body. In the whole operation process, the opening degree of the jaw is high in adjusting speed and efficiency, the locking structure can lock or loosen the upper wrench body, operation is easy, and the adjusting efficiency of the size of the jaw and the locking and maintaining function of the upper wrench body are both considered.

Description

Technical fields:

[0001] This utility model relates to the field of manual hardware tools, and in particular to a parallel open-end wrench with a self-adjusting function. Background technology:

[0002] Currently, the structure of existing open-end wrenches on the market is similar to that disclosed in patent application CN205888987U, which describes a large-opening wrench. This wrench includes a handle body, fixed jaws, and movable jaws. The handle body has a rack, and the movable jaws have a helical wheel that engages with the rack. During use, the size of the jaws is adjusted by rotating the helical wheel. However, this adjustment method results in a relatively slow movement speed of the movable jaws, low efficiency in jaw size adjustment, and cumbersome operation. Furthermore, without the helical wheel and rack engagement structure, it cannot provide a locking and retaining effect during clamping. Currently, there is no good solution to these problems.

[0003] In summary, how to achieve rapid adjustment of the jaws and lock retention of open-end wrenches has become a technical problem 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 parallel open-end wrench with a self-adjusting function, which solves the problem that previous open-end wrenches could not balance efficiency and locking retention when adjusting the jaw size.

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

[0006] A parallel open-end wrench with self-adjusting function includes a fixed handle, an upper wrench body movably installed inside the fixed handle, the bottom front end of the fixed handle being connected to the movable handle via a first rivet, a fixed jaw being installed at the top front end of the fixed handle, the fixed jaw cooperating with the front end of the upper wrench body to clamp the workpiece, a pin being provided at the tail end of the upper wrench body, a locking sleeve being fitted in the middle of the upper wrench body and installed inside the fixed handle, a compression spring being fitted on the outer side of the upper wrench body between the pin and the locking sleeve, and a locking structure being provided between the locking sleeve and the movable handle, the locking structure being used to lock and maintain the position of the upper wrench body.

[0007] The locking structure includes a pull rod, one end of which is connected to a movable handle via a second rivet, and the other end of which is connected to the upper part of a cam via a rotating shaft. The lower part of the cam is connected to one side of a locking sleeve via a third rivet. An arc-shaped ratchet is provided on the outer side of the lower part of the cam. A locking block is movably installed in the locking sleeve between the cam and the upper plate body. The locking block is provided with straight ratchet teeth that mesh with the arc-shaped ratchet teeth.

[0008] A screw seat is provided on one side of the connection end between the pull rod and the cam. An adjusting screw is installed in the internal thread of the screw seat. The adjusting screw cooperates with the cam to adjust the locking force.

[0009] The lower part of the movable handle is connected to the front end of the unlocking switch via a fourth rivet and a torsion spring. The side of the unlocking switch is provided with an unlocking protrusion that cooperates with the fixed handle.

[0010] The movable handle is provided with a limiting protrusion that cooperates with the unlocking switch.

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

[0012] By inserting the upper jaw into the fixed handle, a compression spring is fitted on the outer side of the upper jaw between the pin and the locking sleeve. Pulling the upper jaw upwards allows for quick adjustment of the opening between the upper jaw and the fixed jaws. After releasing the upper jaw, the workpiece is clamped under the force of the compression spring. Then, pressing the movable handle causes the locking mechanism to engage, locking the upper jaw in place. When it is necessary to open, rotating the movable handle outwards releases the upper jaw. The entire operation offers fast jaw opening adjustment and high efficiency. The locking mechanism can lock or release the upper jaw, making the operation simple and combining jaw size adjustment efficiency with the locking function of the upper jaw. Attached image description:

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

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

[0015] Figure 3 This is a schematic diagram of the unlocking switch of this utility model.

[0016] Figure 4 This is a schematic diagram of the connecting rod and cam portion of this utility model.

[0017] In the diagram, 1. Fixed handle, 2. Upper plate, 3. First rivet, 4. Movable handle, 5. Fixed jaws, 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. 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 1-4 As shown, a parallel open-end wrench with self-adjusting function includes a fixed handle 1, an upper wrench body 2 movably installed inside the fixed handle 1, the handle of the upper wrench body 2 being movably inserted into the fixed handle 1, the front end of the upper wrench body 2 being bent and located outside the fixed handle 1, the bottom of the front end of the fixed handle 1 being connected to a movable handle 4 via a first rivet 3, a fixed jaw 5 being installed at the top of the front end of the fixed handle 1, the fixed jaw 5 cooperating with the bent front end of the upper wrench body 2 for clamping the workpiece, a pin 6 being provided at the tail end of the upper wrench body 2, a locking sleeve 7 installed inside the fixed handle 1 being sleeved in the middle of the upper wrench body 2, a compression spring 8 being sleeved on the outer side of the upper wrench body 2 between the pin 6 and the locking sleeve 7, and a locking structure being provided between the locking sleeve 7 and the movable handle 4, the locking structure being used to lock and maintain the position of the upper wrench body 2.

[0020] The locking structure includes a pull rod 9. One end of the pull rod 9 is connected to the movable handle 4 via a second rivet 10, and the other end of the pull rod 9 is connected to the upper part of the cam 12 via a rotating shaft 11. The lower part of the cam 12 is connected to one side of the locking sleeve 7 via a third rivet 13. The lower outer side of the cam 12 is provided with an arc-shaped ratchet. A locking block 14 is movably installed in the locking sleeve 7 between the cam 12 and the upper plate 2. The locking block 14 is provided with a straight ratchet that meshes with the arc-shaped ratchet. The locking block 14 is restricted to the locking sleeve 7 between the cam 12 and the upper plate 2 and can move, but will not fall off.

[0021] A screw seat 15 is provided on one side of the connection end between the pull rod 9 and the cam 12. An adjusting screw 16 is installed in the internal thread of the screw seat 15. The adjusting screw 16 cooperates with the cam 12 to adjust the locking force. When the front end of the adjusting screw 16 is closer to the cam 12, the rotation angle of the cam 12 is smaller, the movement distance of the locking block 14 driven by the cam 12 is smaller, and the locking force is smaller. Conversely, when the front end of the adjusting screw 16 is farther from the cam 12, the rotation angle of the cam 12 is larger, the movement distance of the locking block 14 driven by the cam 12 is larger, and the locking force is larger.

[0022] The lower part of the movable handle 4 is connected to the front end of the unlocking switch 19 via a fourth rivet 17 and a torsion spring 18. The side of the unlocking switch 19 is provided with an unlocking protrusion 20 that cooperates with the fixed handle 1. When the unlocking switch 19 is pressed towards the fixed handle 1, the unlocking protrusion 20 will support the fixed handle 1 and cause the movable handle 4 to rotate outward, thereby releasing the upper lever 2 of the locking structure.

[0023] The movable handle 4 is provided with a limiting protrusion 21 that cooperates with the unlocking switch 19. The limiting protrusion 21 can restrict the unlocking switch 19 within the movable handle 4, preventing the unlocking switch 19 from disengaging from the movable handle 4 under the action of the torsion spring 18.

[0024] Working principle:

[0025] In use, first pull up the upper lever 2. The pin 6 compresses the spring 8, and the opening between the upper lever 2 and the fixed jaw 5 can be opened quickly. Then, place the workpiece between the openings and release the upper lever 2. Under the elastic force of the spring 8, the upper lever 2 clamps the workpiece downwards, achieving the purpose of quickly adjusting the opening amount. Then, press the movable handle 4 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 closer to the upper lever 2, gradually reducing the gap between the locking block 14 and the upper lever 2, and gradually locking the upper lever 2. When the first rivet 3, the second rivet 10, and the third rivet 13 are in a straight line, it can be... To achieve the locking and holding of the upper plate 2, the moving handle 4 moves the unlocking switch 19 towards the fixed handle 1, at which time the torsion spring 18 is compressed. When it is necessary to open, simply press the unlocking switch 19 towards the fixed handle 1. The unlocking protrusion 20 on the unlocking switch 19 will support the fixed handle 1, causing the moving handle 4 to rotate outward. At the same time, under the action of the torsion spring 18, the moving handle 4 opens. The moving 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 disengage from the upper plate 2, thus releasing the upper plate 2. This achieves the locking and unlocking function of the upper plate 2, and ultimately realizes the locking and holding function when clamping the workpiece.

[0026] 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.

[0027] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A parallel open-end wrench with self-adjusting function, characterized in that: The device includes a fixed handle, within which an upper plate is movably mounted. The bottom front end of the fixed handle is connected to a movable handle via a first rivet. A fixed jaw is mounted on the top front end of the fixed handle, which engages with the front end of the upper plate to clamp the workpiece. A pin is provided at the tail end of the upper plate. A locking sleeve, installed inside the fixed handle, is fitted in the middle of the upper plate. A compression spring is fitted on the outer side of the upper plate between the pin and the locking sleeve. A locking structure is provided between the locking sleeve and the movable handle, which is used to lock and maintain the position of the upper plate.

2. A parallel open-end wrench with self-adjusting function according to claim 1, characterized in that: The locking structure includes a pull rod, one end of which is connected to a movable handle via a second rivet, and the other end of which is connected to the upper part of a cam via a rotating shaft. The lower part of the cam is connected to one side of a locking sleeve via a third rivet. An arc-shaped ratchet is provided on the outer side of the lower part of the cam. A locking block is movably installed in the locking sleeve between the cam and the upper plate body. The locking block is provided with straight ratchet teeth that mesh with the arc-shaped ratchet teeth.

3. A parallel open-end wrench with self-adjusting function according to claim 2, characterized in that: A screw seat is provided on one side of the connection end between the pull rod and the cam. An adjusting screw is installed in the internal thread of the screw seat. The adjusting screw cooperates with the cam to adjust the locking force.

4. A parallel open-end wrench with self-adjusting function according to claim 1 or 2, characterized in that: The lower part of the movable handle is connected to the front end of the unlocking switch via a fourth rivet and a torsion spring. The side of the unlocking switch is provided with an unlocking protrusion that cooperates with the fixed handle.

5. A parallel open-end wrench with self-adjusting function according to claim 4, characterized in that: The movable handle is provided with a limiting protrusion that cooperates with the unlocking switch.

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