Quick head replacing method for multifunctional large-opening wrench

Abstract

The invention relates to the technical field of manual hardware tools, in particular to a quick head replacing method for a multifunctional large-opening wrench. Comprising a wrench body and a wrench opening, an arc groove and a positioning hole are formed in the positions, clamping a workpiece, of the head of the wrench body and the head of the wrench opening respectively, a quick-change head is assembled in the arc groove, and the quick-change head is connected with the wrench body and the wrench opening through an elastic pin structure installed in the positioning hole; a positioning counter bore is formed in the position, close to the edge, of the quick-change head, a U-shaped groove is formed in the lower portion of the positioning counter bore, the elastic pin structure comprises a fixing pin, a spring is sleeved on the fixing pin, and a nut is in threaded connection with the tail end of the lower portion of the fixing pin. By arranging the quick-change head, the quick-change head is connected with the wrench body and the wrench opening through the elastic pin structure, so that the wrench is diversified in function, bolts or nuts can be screwed, different quick-change heads can be quickly replaced as pipe tongs or bathroom wrenches according to requirements, and the wrench is suitable for mounting and dismounting work of workpieces in various working environments.

Description

Technical Field

[0001] This invention relates to the field of manual hardware tools, and in particular to a quick head-changing method for a multi-functional large-opening wrench. 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. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a quick head-changing method for a multi-functional large-opening wrench, solving the problems of fixed wrench teeth that cannot be changed and limited functionality in previous adjustable wrenches.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A quick-change head method for a multi-functional large-opening wrench, the wrench comprising a wrench body and a wrench jaw, wherein the head of the wrench body and the wrench jaw are respectively provided with an arc groove and a positioning hole at the workpiece clamping position, and a quick-change head is assembled in the arc groove. The quick-change head is connected to the wrench body and the wrench jaw through a spring-loaded 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, and the outer contour of the positioning countersunk hole is greater than half a circle; the spring-loaded structure includes a fixing pin, and the fixing pin is fitted with a spring. The lower tail end is threaded with a nut. When the quick-change head needs to be replaced, press the bottom of the fixing pin upwards. The fixing pin drives the nut upwards, and the nut compresses the spring, causing the head of the fixing pin to disengage from the positioning countersunk hole on the quick-change head. The quick-change head can then be removed along the U-shaped groove. The original quick-change head can then be removed. According to the work requirements, place the required quick-change head into the arc groove of the wrench body and the wrench mouth. The U-shaped groove holds the fixing pin. Then, release the bottom of the fixing pin. The spring returns to its original position, causing the head of the fixing pin to engage with the positioning countersunk hole for limiting. The quick-change head replacement is now complete.

[0006] 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 middle of the wrench mouth is slotted, and a worm gear that meshes with the adjusting tooth position is assembled in the slot through a pin.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] The quick-change head has limiting bosses at both ends where it clamps the workpiece.

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

[0014] The present invention adopts the above-described 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

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the flap body of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the quick-change head of the present invention.

[0019] 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

[0020] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0021] like Figure 1-4 As shown, a quick-change head method for a multi-functional large-opening wrench is disclosed. The wrench includes a wrench body 1 and a wrench jaw 2. The wrench body 1 and the wrench jaw 2 have arc grooves 6 and positioning holes 7 at their workpiece clamping points, respectively. A quick-change head 8 is fitted into the arc groove 6 and is connected to the wrench body 1 and the wrench jaw 2 via a spring-loaded structure 9 installed in the positioning hole 7. The quick-change head 8 has a countersunk hole 10 near its edge, with a U-shaped groove 11 at its lower part. The outer contour of the countersunk hole 10 is greater than half a circle. The spring-loaded structure includes a fixing pin 12, on which a spring 13 is fitted. The lower end of the fixing pin 12... The threaded connection has a nut 14. When the quick-change head 8 needs to be replaced, 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. The original quick-change head 8 can then be removed. According to the work requirements, the required quick-change head 8 is placed into the arc groove 6 of the wrench body 1 and the wrench mouth 2. The U-shaped groove 11 holds the fixing pin 12. Then, the bottom of the fixing pin 12 is released, and 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 replacement of the quick-change head 8 is then completed.

[0022] The handle of the wrench body 1 is provided with an adjusting tooth position 3. The length of the adjusting tooth position 3 is greater than the length of the tooth position on the wrench mouth of an ordinary adjustable wrench, so that the opening of this wrench is greater than that of an ordinary wrench. The wrench mouth 2 is fitted on the outside of the handle of the wrench body 1. The wrench mouth 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] The above specific embodiments should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, any alternative improvements or modifications made to the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0031] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A quick head-changing method for a multi-functional large-opening wrench, the wrench comprising a wrench body and a wrench jaw, characterized in that: The workpiece clamping points of the wrench body and wrench jaw are respectively provided with arc grooves and positioning holes. A quick-change head is assembled in the arc groove. The quick-change head is connected to the wrench body and wrench jaw 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 sleeved on the fixing pin, and a nut threaded to the lower end of the fixing pin. When the quick-change head needs to be replaced, press the bottom of the fixing pin upward. The fixing pin drives the nut upward. The nut compresses the spring, causing the head of the fixing pin to disengage from the positioning countersunk hole on the quick-change head. The quick-change head can then be disengaged along the U-shaped groove. The original quick-change head can then be removed. According to the work requirements, the required quick-change head is placed into the arc groove of the wrench body and wrench jaw. The U-shaped groove holds the fixing pin. Then, the bottom of the fixing pin is released. The spring returns to its original position, causing the head of the fixing pin to engage with the positioning countersunk hole for limiting. The quick-change head replacement is then completed.

2. The method for quick head changing of a multi-functional large-opening wrench according to claim 1, 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 middle of the wrench mouth is slotted, and a worm gear that meshes with the adjusting tooth position is assembled in the slot through a pin.

3. The quick head-changing method for a multi-functional large-opening wrench according to claim 2, 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.

4. The quick head-changing method for a multi-functional large-opening wrench 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.

5. The quick head-changing method for a multi-functional large-opening wrench according to claim 4, 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.

6. The method for quick head changing of a multi-functional large-opening wrench 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.

7. The quick head-changing method for a multi-functional large-opening wrench 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.

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

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

Images