Multifunctional large-opening wrench capable of quickly adjusting opening amount

Abstract

The utility model relates to manual hardware tool technical field, especially a kind of multifunctional big opening spanner of quick-adjusting opening amount. Including spanner body and spanner mouth, the middle part of spanner body is equipped with gear teeth position, spanner pin passes through pin hole, gear teeth position is connected with spanner body, spanner mouth assembly connection, the side surface of spanner pin is equipped with smooth surface and the gear teeth shape matched with gear teeth position, the one end of spanner pin is equipped with button, the other end is contacted with spring leaf fixed on spanner mouth;The head of spanner body, spanner mouth is respectively equipped with arc groove and positioning hole at workpiece clamping place, arc groove is equipped with quick-change head, quick-change head is connected with spanner body, spanner mouth by the elastic pin structure of being installed in positioning hole. When pressing gear teeth position and making gear teeth shape to be separated, spanner mouth can be quickly slid along gear teeth position, can realize quick-adjusting opening, improve work efficiency;The spanner function diversification, both can be screwed bolt or nut, also can be according to the demand quick replacement different quick-change head as pipe wrench or bathroom spanner use.

Description

Technical Field

[0001] This utility model relates to the field of manual hardware tools, and in particular to a multi-functional large-opening wrench with a quickly adjustable opening size. Background Technology

[0002] A wrench is a tool used to continuously and repeatedly tighten and loosen fasteners such as bolts and nuts. Wrenches are mainly divided into adjustable wrenches and open-end wrenches. Adjustable wrenches have movable jaws, and the opening size can be adjusted by rotating a worm gear to accommodate different fastener sizes. Currently, most adjustable wrenches have the following drawbacks in practical use: First, adjusting the opening size by rotating the worm gear only allows for step-by-step adjustment along the wrench's teeth, resulting in slow adjustment speed. When a larger opening is needed, it cannot be quickly adjusted to meet requirements, affecting work efficiency. Second, their function is relatively limited; the jaw teeth are fixed and cannot be changed, making them convenient only for tightening bolts and nuts. They are less effective at tightening cylindrical workpieces, requiring multiple wrenches and significantly limiting practical operation. Currently, there is no good solution to these problems.

[0003] In summary, how to quickly adjust the opening of an adjustable wrench has become a pressing technical challenge that needs to be addressed in the industry. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a multi-functional large-opening wrench that can quickly adjust the opening amount, solving the problems of slow speed and low efficiency of previous adjustable wrenches that could only adjust the opening amount step by step along the teeth of the wrench body, and solving the problems of fixed wrench teeth that could not be changed and relatively simple functions of previous adjustable wrenches.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A multi-functional large-opening wrench with quick-adjustable opening size includes a wrench body and a wrench mouth. The wrench body has a shift tooth in the middle, and the wrench mouth has a rectangular through groove for the wrench body handle to move through. A pin hole is provided on the wrench mouth at the position corresponding to the shift tooth. The shift pin passes through the pin hole and the shift tooth to assemble and connect the wrench body and the wrench mouth. The side of the shift pin has a smooth surface and shift teeth that match the shift tooth. One end of the shift pin has a button, and the other end contacts a spring fixed on the wrench mouth. The head of the wrench body and the wrench mouth have an arc groove and a positioning hole respectively at the workpiece clamping position. A quick-change head is installed in the arc groove. The quick-change head is connected to the wrench body and the wrench mouth through an elastic pin structure installed in the positioning hole.

[0006] The shift pin has a round hole on one end face, and the button is riveted to the round hole.

[0007] The other end of the shift pin has a spring groove on its face. The spring is installed in the spring groove. The fixed end of the spring is connected to the face by a screw, and the movable end of the spring is in contact with the shift pin.

[0008] The quick-change head has a positioning countersunk hole near the edge, the lower part of the positioning countersunk hole is a U-shaped groove, the outer contour of the positioning countersunk hole is greater than half a circle, and the two ends of the quick-change head where the workpiece is clamped are provided with limiting bosses.

[0009] The shape of the workpiece clamping surface of the quick-change head includes a flat, toothed surface, a toothed surface, a toothed inclined surface, or a toothed curved surface.

[0010] The elastic pin structure includes a fixing pin, which is a stepped column with a head diameter larger than the lower diameter. A spring is fitted on the fixing pin, and a nut is threaded to the lower end of the fixing pin.

[0011] The spring is located between the nut and the wrench body or wrench mouth, and the spring is in a compressed state when assembled.

[0012] The head of the fixing pin mates with the positioning countersunk hole, and the lower part of the fixing pin mates with the U-shaped groove.

[0013] The tail of the plate is provided with a tail hole.

[0014] The present invention adopts the above solution and has the following beneficial effects: The wrench body and wrench opening are assembled and connected by a shift pin passing through a pin hole and shift teeth. The side of the shift pin has a smooth surface and shift teeth that match the shift teeth. When the shift pin is pressed to disengage the shift teeth, the wrench opening can slide quickly along the shift teeth, which can quickly adjust the opening and improve work efficiency. By setting a quick-change head, which is connected to the wrench body and wrench opening through a flexible pin structure, the wrench's function is diversified. It can be used to tighten bolts or nuts, and different quick-change heads can be quickly changed to be used as pipe wrenches or bathroom wrenches as needed. Moreover, due to the presence of shift teeth, the opening range of this wrench is larger than that of ordinary wrenches, making it suitable for the installation and disassembly of workpieces in various working environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the flange of this utility model.

[0019] Figure 5This is a three-dimensional structural diagram of the shift pin of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the quick-change head of this utility model.

[0021] In the diagram, 1. lever body, 2. lever opening, 3. shift gear position, 4. rectangular through groove, 5. pin hole, 6. shift pin, 7. smooth surface, 8. shift gear tooth shape, 9. button, 10. spring, 11. arc groove, 12. positioning hole, 13. quick-change head, 14. round hole, 15. spring groove, 16. screw, 17. positioning countersunk hole, 18. U-shaped groove, 19. limiting boss, 20. fixing pin, 21. spring, 22. nut, 23. tail hole. Detailed Implementation

[0022] 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.

[0023] like Figure 1-6 As shown, a multi-functional large-opening wrench with quick-adjustable opening capacity includes a wrench body 1 and a wrench mouth 2. The wrench body 1 has a shift tooth position 3 in the middle. The wrench mouth 2 has a rectangular through groove 4 inside, allowing the handle of the wrench body 1 to move through. The wrench mouth 2 has a pin hole 5 at the position corresponding to the shift tooth position 3. A shift pin 6 passes through the pin hole 5 and the shift tooth position 3 to assemble and connect the wrench body 1 and the wrench mouth 2. The side of the shift pin 6 has a smooth surface 7 and a shift tooth shape 8 that matches the shift tooth position 3. One end of the shift pin 6 has a button 9, and the other end contacts a spring 10 fixed on the wrench mouth 2. The head of the wrench body 1 and the wrench mouth 2 have an arc groove 11 and a positioning hole 12 respectively at the workpiece clamping position. A quick-change head 13 is installed in the arc groove 11. The quick-change head 13 is connected to the wrench body 1 and the wrench mouth 2 through an elastic pin structure installed in the positioning hole 12.

[0024] The shift pin 6 has a round hole 14 on one end face, and the button 9 is riveted to the round hole 14.

[0025] The other end of the shift pin 6 has a spring groove 15 on its face. A spring 10 is installed in the spring groove 15. The fixed end of the spring 10 is connected to the face 2 via a screw 16, and the movable end of the spring 10 contacts the shift pin 6. The spring groove 15 is used to position the spring 10 so that it does not rotate around the screw 16. In the initial state, one end of the spring 10 is tightly attached to the bottom of the shift pin 6, ensuring that the shift teeth 8 and shift positions 3 on the shift pin 6 are in a meshing state.

[0026] The quick-change head 13 has a positioning countersunk hole 17 near its edge. The lower part of the positioning countersunk hole 17 is a U-shaped groove 18. The outer contour of the positioning countersunk hole 17 is larger than half a circle. The head of the fixing pin 20 mates with the positioning countersunk hole 17, and the lower part of the fixing pin 20 mates with the U-shaped groove 18. The outer contour of the positioning countersunk hole 17 ensures that the quick-change head 13 will not easily disengage from the control of the fixing pin 20 when the bottom of the fixing pin 20 is not pressed. The head of the fixing pin 20 mates with the positioning countersunk hole 17 on the quick-change head 13 to control the installation and removal of the quick-change head 13.

[0027] The quick-change head 13 has limiting bosses 19 at both ends where it clamps the workpiece. The limiting bosses 19 are spaced apart from the heads of the wrench body 1 and the wrench mouth 2, which allows the quick-change head 13 to swing within a certain angle, so that the wrench can firmly clamp the workpiece.

[0028] The quick-change head 13 has various shapes for clamping the workpiece surface, including flat toothless, flat toothed, inclined toothed, or arc toothed surfaces. Different shapes allow the wrench to adapt to different working scenarios.

[0029] The elastic pin structure includes a fixing pin 20, which is a stepped column with a head diameter larger than the lower diameter. A spring 21 is fitted on the fixing pin 20, and a nut 22 is threaded to the lower end of the fixing pin 20.

[0030] The spring 21 is located between the nut 22 and the wrench body 1 or the wrench mouth 2. When the spring 21 is assembled, it is in a compressed state. The spring 21 in the initial compressed state can make the head of the fixing pin 20 close to the positioning countersunk hole 17.

[0031] The wrench body 1 has a tail hole 23 at its tail end, which can be used to hang the wrench in a convenient position for easy access.

[0032] Working principle: During use, when it is necessary to quickly adjust the opening amount, press down button 9. Button 9 drives the shift pin 6 to move downward. The shift pin 6 presses down on the spring 10, causing the shift pin 6 to move downward until the shift tooth 8 on it disengages from the shift tooth position 3. At this time, the opening can be quickly adjusted by moving the wrench 2 along the shift tooth position 3. After the adjustment is completed, release button 9. The spring 10 elastically resets, causing the shift tooth 8 on the shift pin 6 to re-engage with the shift tooth position 3 and lock. Then the workpiece can be screwed. When the quick-change head needs to be replaced, press the bottom of the fixing pin 20 upwards. The fixing pin 20 drives the nut 22 to move upwards. The nut 22 compresses the spring 21, causing the head of the fixing pin 20 to disengage from the positioning countersunk hole 17 on the quick-change head 13. The quick-change head 13 can then be removed along the U-shaped groove 18. The original quick-change head 13 can then be removed. According to the work requirements, the required quick-change head 13 is placed into the arc groove 11 of the wrench body 1 and the wrench mouth 2. The U-shaped groove 18 holds the fixing pin 20. Then, release the bottom of the fixing pin 20. The spring 21 returns to its original position, causing the head of the fixing pin 20 to engage with the positioning countersunk hole 17 for limiting. The quick-change head replacement is now complete.

[0033] 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.

[0034] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A multi-functional large-opening wrench with quickly adjustable opening size, comprising a wrench body and a wrench mouth, characterized in that: The wrench body has a shift tooth position in the middle, and the wrench mouth has a rectangular through groove for the wrench body handle to move through. The wrench mouth has a pin hole at the position corresponding to the shift tooth position. The shift pin passes through the pin hole and the shift tooth position to assemble and connect the wrench body and the wrench mouth. The side of the shift pin has a smooth surface and a shift tooth shape that matches the shift tooth position. One end of the shift pin has a button, and the other end contacts a spring fixed on the wrench mouth. The head of the wrench body and the wrench mouth have an arc groove and a positioning hole respectively at the workpiece clamping position. A quick-change head is assembled in the arc groove. The quick-change head is connected to the wrench body and the wrench mouth through an elastic pin structure installed in the positioning hole.

2. The multi-functional large-opening wrench with quickly adjustable opening amount according to claim 1, characterized in that: The shift pin has a round hole on one end face, and the button is riveted to the round hole.

3. The multi-functional large-opening wrench with quickly adjustable opening amount according to claim 1, characterized in that: The other end of the shift pin has a spring groove on its face. The spring is installed in the spring groove. The fixed end of the spring is connected to the face by a screw, and the movable end of the spring is in contact with the shift pin.

4. A multi-functional large-opening wrench with quickly adjustable opening amount according to claim 1, characterized in that: The quick-change head has a positioning countersunk hole near the edge, the lower part of the positioning countersunk hole is a U-shaped groove, the outer contour of the positioning countersunk hole is greater than half a circle, and the two ends of the quick-change head where the workpiece is clamped are provided with limiting bosses.

5. A multi-functional large-opening wrench with quickly adjustable opening amount according to claim 1, characterized in that: The shape of the workpiece clamping surface of the quick-change head includes a flat, toothed surface, a toothed surface, a toothed inclined surface, or a toothed curved surface.

6. A multi-functional large-opening wrench with quickly adjustable opening amount according to claim 4, characterized in that: The elastic pin structure includes a fixing pin, which is a stepped column with a head diameter larger than the lower diameter. A spring is fitted on the fixing pin, and a nut is threaded to the lower end of the fixing pin.

7. A multi-functional large-opening wrench with rapidly adjustable opening amount according to claim 6, characterized in that: The spring is located between the nut and the wrench body or wrench mouth, and the spring is in a compressed state when assembled.

8. A multi-functional large-opening wrench with quickly adjustable opening amount according to claim 6, characterized in that: The head of the fixing pin mates with the positioning countersunk hole, and the lower part of the fixing pin mates with the U-shaped groove.

9. A multi-functional large-opening wrench with quickly adjustable opening amount according to claim 1, characterized in that: The tail of the plate is provided with a tail hole.

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