Multi-functional large opening wrench with quick head changing

Abstract

The utility model relates to manual hardware tool technical field, especially a kind of multifunctional big opening wrench of quick head changeover. Including wrench body and wrench mouth, the handle portion of wrench body is equipped with adjusting tooth position, wrench mouth is sleeved in the outside of wrench body handle portion, and the middle part of wrench mouth is slotted, and the worm meshing with adjusting tooth position is assembled in groove by pin shaft;The head part of the wrench body, wrench mouth is respectively equipped with arc groove and positioning hole at workpiece clamping place, and quick change head is assembled in arc groove, and quick change head is connected with wrench body and wrench mouth by the elastic pin structure installed in positioning hole;Quick change head is equipped with positioning counterbore near edge, and the lower part of positioning counterbore is U-shaped groove, and the elastic pin structure includes fixed pin, spring is sleeved on fixed pin, and nut is threadedly connected in the lower part tail end of fixed pin. This wrench is diversified in function, can be screwed bolt or nut, can also be used as pipe wrench or bathroom wrench according to the requirement to quickly replace different quick change head, suitable for the installation and disassembly work of workpiece under a variety of operating environments.

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 quick-change head. Background Technology

[0002] A wrench is a tool used to continuously 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 sizes of fasteners. Currently, most adjustable wrenches have relatively limited functionality in practical use. 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 to be used, which significantly limits their practical application. Currently, there is no good solution to these problems.

[0003] In summary, how to achieve the change of the wrench teeth profile has become a technical problem that urgently needs to be solved in the industry. Utility Model Content

[0004] To overcome the shortcomings of existing technology, this utility model provides a multi-functional large-opening wrench with quick head replacement, which solves the problems of fixed wrench teeth that cannot be replaced and limited functionality 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-change head includes a wrench body and a wrench mouth. The handle of the wrench body is provided with an adjusting tooth position. The wrench mouth is fitted onto the outside of the handle of the wrench body. A groove is cut in the middle of the wrench mouth, and a worm gear that meshes with the adjusting tooth position is assembled in the groove through a pin. The head of the wrench body and the wrench mouth are respectively provided with an arc groove and a positioning hole at the workpiece clamping position. The 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. The quick-change head has a positioning countersunk hole near its 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. The elastic pin structure includes a fixing pin, a spring is fitted on the fixing pin, and a nut is threaded to the lower end of the fixing pin.

[0006] The inside of the wrench is provided with a rectangular through groove through which the handle of the wrench body can move. The bottom of the wrench is provided with a pin hole for installing a pin.

[0007] The fixing pin is a stepped column with a head diameter larger than the lower diameter and a head diameter slightly smaller than the diameter of the positioning countersunk hole. The lower end of the fixing pin is provided with a thread that mates with the nut.

[0008] 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.

[0009] The spring is fitted onto the fixing pin, with the upper end of the spring in contact with the lever body or lever mouth, and the lower end of the spring in contact with the nut. The spring is in a compressed state during assembly.

[0010] 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.

[0011] The quick-change head has limiting bosses at both ends where it clamps the workpiece.

[0012] The tail of the plate is provided with a tail hole.

[0013] The present invention adopts the above solution and has the following beneficial effects: By incorporating a quick-change head, which connects to the wrench body and jaws via a flexible pin structure, this wrench becomes versatile. It can be used to tighten or loosen bolts or nuts, and can also be quickly replaced with different quick-change heads to be used as a pipe wrench or bathroom wrench as needed. Furthermore, because the length of the adjustable teeth is greater than that of the teeth on a regular adjustable wrench, this wrench has a larger opening capacity than a regular wrench, making it suitable for the installation and disassembly of workpieces in various working environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the flap body of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the quick-change head of this utility model.

[0018] In the diagram, 1. Baffle body, 2. Baffle opening, 3. Adjusting gear position, 4. Pin, 5. Worm gear, 6. Arc groove, 7. Positioning hole, 8. Quick change head, 9. Elastic pin structure, 10. Positioning countersunk hole, 11. U-shaped groove, 12. Fixing pin, 13. Spring, 14. Nut, 15. Rectangular through groove, 16. Pin hole, 17. Limiting boss, 18. Tail hole. Detailed Implementation

[0019] 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.

[0020] like Figure 1-4As shown, a multi-functional large-opening wrench with quick-change head includes a wrench body 1 and a wrench jaw 2. The handle of the wrench body 1 is provided with an adjusting tooth position 3, the length of which is greater than the length of the tooth position on the jaw of a regular adjustable wrench, so that the opening of this wrench is greater than that of a regular wrench. The wrench jaw 2 is fitted onto the outside of the handle of the wrench body 1. The wrench jaw 2 has a groove in the middle, and a worm gear 5 that meshes with the adjusting tooth position 3 is assembled in the groove through a pin 4. The workpiece clamping points of the wrench body 1 and the wrench jaw 2 are respectively provided with arcs. The groove 6 and the positioning hole 7 are provided. The quick-change head 8 is installed in the arc groove 6. The quick-change head 8 is connected to the wrench body 1 and the wrench mouth 2 through the elastic pin structure 9 installed in the positioning hole 7. The quick-change head 8 is provided with a positioning countersunk hole 10 near the edge. The lower part of the positioning countersunk hole 10 is a U-shaped groove 11. The outer contour of the positioning countersunk hole 10 is greater than half a circle. The elastic pin structure includes a fixing pin 12. A spring 13 is sleeved on the fixing pin 12. A nut 14 is threaded to the lower end of the fixing pin 12.

[0021] The inside of the wrench 2 is provided with a rectangular through groove 15 for the handle of the wrench body 1 to move through, and the bottom of the wrench 2 is provided with a pin hole 16 for installing the pin 4.

[0022] The retaining pin 12 is a stepped columnar shape, with a head diameter larger than the lower diameter and a head diameter slightly smaller than the diameter of the positioning countersunk hole 10. The lower end of the retaining pin 12 has a thread that mates with the nut 14. The head of the retaining pin 12 mates with the positioning countersunk hole 10, and the lower part of the retaining pin 12 mates with the U-shaped groove 11. The outer contour of the positioning countersunk hole 10 ensures that the quick-change head 8 will not easily disengage from the retaining pin 12 when the bottom of the retaining pin 12 is not pressed. The head of the retaining pin 12 mates with the positioning countersunk hole 10 on the quick-change head 8 to control the installation and removal of the quick-change head 8.

[0023] The spring 13 is sleeved on the fixing pin 12. The upper end of the spring 13 contacts the wrench body 1 or the wrench mouth 2, and the lower end of the spring 13 contacts the nut 14. The spring 13 is in a compressed state during assembly. The spring 13 in the initial compressed state can make the head of the fixing pin 12 close to the positioning countersunk hole 10.

[0024] The quick-change head 8 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.

[0025] The quick-change head 8 has limiting bosses 17 at both ends where it clamps the workpiece. The limiting bosses 17 are spaced apart from the heads of the wrench body 1 and the wrench mouth 2, allowing the quick-change head 8 to swing within a certain angle so that the wrench can firmly clamp the workpiece.

[0026] The wrench body 1 has a tail hole 18 at its tail end, which can be used to suspend the wrench 1 in a convenient position for easy access.

[0027] Working principle: In use, by rotating the worm 5, which meshes with the adjusting gear 3, the wrench jaw 2 can move along the handle of the wrench body 1, thus adjusting the opening amount. When it is necessary to replace the quick-change head 8, press the bottom of the fixing pin 12 upwards. The fixing pin 12 drives the nut 14 to move upwards. The nut 14 compresses the spring 13, causing the head of the fixing pin 12 to disengage from the positioning countersunk hole 10 on the quick-change head 8. The quick-change head 8 can then be disengaged outwards along the U-shaped groove 11, allowing the original quick-change head 8 to be removed. According to the work requirements, place the required quick-change head 8 into the arc groove 6 of the wrench body 1 and the wrench jaw 2. The U-shaped groove 11 holds the fixing pin 12. Then, release the bottom of the fixing pin 12. The spring 13 returns to its original position, causing the head of the fixing pin 12 to engage with the positioning countersunk hole 10 for limiting. The quick-change head 8 replacement is complete. Rotating the worm 5 drives the wrench jaw 2 to move, causing the wrench to clamp the workpiece.

[0028] 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.

[0029] 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 quick-change head, comprising a wrench body and a wrench jaw, characterized in that: The handle of the wrench body is provided with an adjusting tooth position. The wrench mouth is sleeved on the outside of the handle of the wrench body. The wrench mouth has a groove in the middle, and a worm gear that meshes with the adjusting tooth position is assembled in the groove through a pin. The head of the wrench body and the wrench mouth are respectively provided with an arc groove and a positioning hole 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. 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. The elastic pin structure includes a fixing pin, a spring is sleeved on the fixing pin, and a nut is threaded to the lower end of the fixing pin.

2. The multi-functional large-opening wrench with quick head change according to claim 1, characterized in that: The inside of the wrench is provided with a rectangular through groove through which the handle of the wrench body can move. The bottom of the wrench is provided with a pin hole for installing a pin.

3. The multi-functional large-opening wrench with quick head change according to claim 1, characterized in that: The fixing pin is a stepped column with a head diameter larger than the lower diameter and a head diameter slightly smaller than the diameter of the positioning countersunk hole. The lower end of the fixing pin is provided with a thread that mates with the nut.

4. A multi-functional large-opening wrench with quick head changing according to claim 3, 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.

5. A multi-functional large-opening wrench with quick head changing according to claim 1, characterized in that: The spring is fitted onto the fixing pin, with the upper end of the spring in contact with the lever body or lever mouth, and the lower end of the spring in contact with the nut. The spring is in a compressed state during assembly.

6. A multi-functional large-opening wrench with quick head changing 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.

7. A multi-functional large-opening wrench with quick head changing according to claim 1, characterized in that: The quick-change head has limiting bosses at both ends where it clamps the workpiece.

8. A multi-functional large-opening wrench with quick head changing according to claim 1, characterized in that: The tail of the plate is provided with a tail hole.

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