Self-adjusting method of parallel open spanner

Abstract

The invention relates to the technical field of manual hardware tools, in particular to a self-adjusting method of a parallel open spanner. 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 field:

[0001] The invention relates to the technical field of manual hardware tools, in particular to a self-adjusting method for a parallel open-end wrench. Background technology:

[0002] At present, the open-end wrenches available on the market have a structure such as that of the patent application with publication number CN205888987U, which discloses a large open-end wrench, including a handle body, fixed jaws and movable jaws, a rack is provided on the handle body, a spiral wheel is provided on the movable jaws, and the spiral wheel is engaged with the rack. When in use, the size of the jaws is adjusted by rotating the spiral wheel. In this adjustment method, the movable jaws move slowly, the adjustment efficiency of the jaw size is low, and the operation is troublesome. If the structure in which the spiral wheel and the rack are engaged is not adopted, it cannot play a locking and holding role during clamping. Currently, there is no good way to solve the above problems.

[0003] In summary, how to achieve rapid adjustment of the jaws of an open-end wrench and how to lock and maintain the jaws has become a technical problem that urgently needs to be solved in the industry. Summary of the invention:

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a self-adjusting method for a parallel open-end wrench, which solves the problem that the efficiency and locking retention cannot be taken into account when adjusting the jaw size of the open-end wrench in the past.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A self-adjusting method for a parallel open-end wrench comprises a fixed handle, an upper wrench body is movably installed in the fixed handle, the front bottom of the fixed handle is connected to the movable handle through a first rivet, 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 sleeved in the middle part of the upper wrench body, a compression spring is sleeved on the outer side of the upper wrench body between the pin and the locking sleeve, when in use, the upper wrench body is pulled upward, the pin 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 openings, and then the upper wrench body is loosened, the upper wrench body clamps the workpiece downward under the action of the elastic force of the compression spring, so as to achieve 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 toward the fixed handle, the movable handle drives the locking structure to lock the upper pull body, thereby locking and maintaining the position of the upper pull body. When the movable handle is rotated outward, the locking structure releases the upper pull body.

[0008] The locking structure includes a pull rod, one end of which is connected to a movable handle via a second rivet, the other end of which is connected to an upper portion of a cam via a rotating shaft, the lower portion 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 portion of the cam, a locking block is movably installed in the locking sleeve between the cam and the upper pull body, and a straight ratchet that engages with the arc-shaped ratchet is provided on the locking block.

[0009] 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 located in the same straight line, the upper pull body can be locked and maintained.

[0010] 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.

[0011] 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 matches the fixed handle.

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

[0013] 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 make the movable handle rotate 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.

[0014] The present invention adopts the above scheme and has the following beneficial effects:

[0015] By movably inserting the upper pull body into the fixed handle, a compression spring is sleeved on the outer side of the upper pull body between the pin shaft and the locking sleeve. The upper pull body can be pulled upward to quickly adjust the opening amount between the upper pull body and the fixed jaws. After loosening the upper pull body, the workpiece is clamped under the action of the elastic force of the compression spring. Thereafter, the movable handle is pressed, and the movable handle drives the locking structure to lock and maintain the position of the upper pull body. When it needs to be opened, the movable handle is rotated outward, and the locking structure can loosen the upper pull body. The opening amount of the jaws can be adjusted quickly and efficiently during the entire operation process. The locking structure can lock or loosen the upper pull body, and the operation is simple, taking into account the adjustment efficiency of the jaw size and the locking and holding function of the upper pull body. Description of the drawings:

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

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

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

[0019] Figure 4 It is a schematic structural 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 jaws, 6, pin shaft, 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 the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0022] like Figure 1-4 As shown, a self-adjusting method for a parallel open-end wrench comprises a fixed handle 1, an upper wrench body 2 is movably installed in the fixed handle 1, the handle of the upper wrench body 2 is movably inserted in the fixed handle 1, the front end head of the upper wrench 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 through 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 wrench body 2 for clamping a workpiece, a pin shaft 6 is provided at the tail end of the upper wrench body 2, a locking sleeve 7 installed in the fixed handle 1 is provided in the middle part of the upper wrench body 2, and the upper portion between the pin shaft 6 and the locking sleeve 7 is provided. A compression spring 8 is sleeved 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, so as to achieve 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 direction of the fixed handle 1, the movable handle 4 drives the locking structure to lock the upper lever body 2, so as to lock and maintain 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 includes a pull rod 9, one end of which is connected to the movable handle 4 through a second rivet 10, and the other end of the pull rod 9 is connected to the upper part of the cam 12 through a rotating shaft 11. The lower part of the cam 12 is connected to one side of the locking sleeve 7 through a third rivet 13. An arc-shaped ratchet is provided on the outer side of the lower part of the cam 12, and a locking block 14 is movably installed in the locking sleeve 7 between the cam 12 and the upper pull body 2. The locking block 14 is provided with straight ratchet teeth that engage with the arc-shaped ratchet teeth. The locking block 14 is restricted in the locking sleeve 7 between the cam 12 and the upper pull body 2 and can move, but will not fall off. When the movable handle 4 is pressed toward 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 approach the upper pull body 2, gradually reducing the gap between the locking block 14 and the upper pull body 2, and gradually locking the upper pull body 2. When the first rivet 3, the second rivet 10, and the third rivet 13 are located in the same straight line, the upper pull body 2 can be locked and maintained.

[0024] A screw seat 15 is provided on one side of the connecting end of the pull rod 9 and the cam 12, and an adjusting screw 16 is installed on the internal thread of the screw seat 15. The adjusting screw 16 cooperates with the cam 12 to adjust the locking force. The closer the front end of the adjusting screw 16 is to the cam 12, the smaller the rotation angle of the cam 12 is, the smaller the moving distance of the locking block 14 driven by the cam 12 is, and the smaller the locking force is; conversely, the farther the front end of the adjusting screw 16 is from the cam 12, the larger the rotation angle of the cam 12 is, the larger the moving distance of the locking block 14 driven by the cam 12 is, and the larger the locking force is.

[0025] The lower part of the movable handle 4 is connected to the front end of the unlocking switch 19 through the fourth rivet 17 and the torsion spring 18, and the side of the unlocking switch 19 is provided with an unlocking protrusion 20 that matches the fixed handle 1. When the unlocking switch 19 is pressed in the direction of the fixed handle 1, the unlocking protrusion 20 will support the fixed handle 1 to rotate the movable handle 4 outward, so that the locking structure releases the upper pull body 2. When it is necessary to open, the unlocking switch 19 is pressed in the direction of the fixed handle 1, and the unlocking protrusion 20 on the unlocking switch 19 will support the fixed handle 1 to rotate the movable handle 4 outward, and at the same time, the movable handle 4 is opened under the action of the elastic force of the torsion spring 18, and 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 disengage from the upper pull body 2, and the upper pull body 2 is released.

[0026] The movable handle 4 is provided with a limiting protrusion 21 that cooperates with the unlocking switch 19 . The limiting protrusion 21 can limit the unlocking switch 19 in the movable handle 4 to prevent the unlocking switch 19 from being separated from the movable handle 4 under the action of the torsion spring 18 .

[0027] Working principle:

[0028] When in use, first pull the upper pull body 2 upwards, the pin 6 compresses the compression spring 8, the opening between the upper pull body 2 and the fixed jaw 5 can be quickly opened, and then the workpiece is placed between the openings, and then the upper pull body 2 is loosened. The upper pull body 2 clamps the workpiece downward under the action of the elastic force of the compression spring 8, so as to achieve the purpose of quickly adjusting the opening amount; then press the movable handle 4 in the direction of 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 approach the upper pull body 2, gradually reducing the gap between the locking block 14 and the upper pull body 2, and gradually locking the upper pull body 2. When the first rivet 3, the second rivet 10, and the third rivet 13 are in the same straight line, To achieve locking and holding of the upper pull body 2, the movable handle 4 moves and drives the unlocking switch 19 to move toward the fixed handle 1, and the torsion spring 18 is compressed at this time; when it needs to be opened, just press the unlocking switch 19 in the direction of the fixed handle 1, and the unlocking protrusion 20 on the unlocking switch 19 will support the fixed handle 1 to make the movable handle 4 rotate outward. At the same time, under the action of the elastic force of the torsion spring 18, the movable handle 4 is opened, and 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 disengage from the upper pull body 2, and the upper pull body 2 is released, thereby realizing the locking and releasing functions of the upper pull body 2, and finally realizing the locking and holding function when the workpiece is clamped.

[0029] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0030] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A self-adjusting method for a parallel open-end wrench, characterized in that: The invention comprises a fixed handle, wherein an upper pull body is movably installed in the fixed handle, the front bottom of the fixed handle is connected to the movable handle by a first rivet, a fixed jaw is installed on the front top of the fixed handle, and the fixed jaw cooperates with the front end of the upper pull body to clamp the workpiece, a pin is provided at the tail end of the upper pull body, a locking sleeve installed in the fixed handle is sleeved in the middle part of the upper pull body, and a compression spring is sleeved on the outer side of the upper pull body between the pin and the locking sleeve. When in use, the upper pull body is pulled upward, the pin compresses the compression spring, and the opening between the upper pull body and the fixed jaw is quickly opened, and then the workpiece is placed between the openings, and then the upper pull body is released, and the upper pull body clamps the workpiece downward under the action of the elastic force of the compression spring, so as to achieve the purpose of quickly adjusting the opening amount; A locking structure is provided between the locking sleeve and the movable handle. When the movable handle is pressed toward the fixed handle, the movable handle drives the locking structure to lock the upper pull body, thereby locking and maintaining the position of the upper pull body. When the movable handle is rotated outward, the locking structure releases the upper pull body.

2. A self-adjusting method for a parallel open-end wrench 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, the other end of which is connected to an upper portion of a cam via a rotating shaft, the lower portion 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 portion of the cam, a locking block is movably installed in the locking sleeve between the cam and the upper pull body, and a straight ratchet that engages with the arc-shaped ratchet is provided on the locking block.

3. The self-adjusting method of a parallel open-end wrench according to claim 2, characterized in that: 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 located in the same straight line, the upper pull body can be locked and maintained.

4. The self-adjusting method of a parallel open-end wrench according to claim 2, 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.

5. A self-adjusting method for a parallel open-end wrench 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 through a fourth rivet and a torsion spring, and the side of the unlocking switch is provided with an unlocking protrusion that matches the fixed handle.

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

7. The self-adjusting method of a parallel open-end wrench according to claim 5, 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 make the movable handle rotate 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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