Non-blocking adjusting method for quick adjustable spanner

Abstract

The invention relates to the technical field of manual hardware tools, in particular to a non-blocking adjusting method for a quick adjustable wrench. Comprising a wrench body and a wrench opening, a circular shaft is arranged at the bottom of the wrench opening and inserted into a circular hole of the wrench body to be connected with the wrench body, teeth are arranged at the bottom of the circular shaft, a worm matched with the teeth at the bottom of the circular shaft is arranged in a square hole in the head of the wrench body, and a left pin shaft and a right pin shaft are elastically installed at the two ends of the worm respectively. A square hole is formed in the worm, a groove is formed between the square hole and the two vertical round holes, the left pin shaft and the right pin shaft slide up and down in the groove, a left spring and a right spring are arranged between the left pin shaft and the bottom of the two vertical round holes and between the right pin shaft and the bottom of the two vertical round holes respectively, set screws are arranged at the top ends of the two vertical round holes respectively, and the upward stroke of the worm is adjusted through the set screws. On the basis that the opening amount of the adjustable spanner is rapidly adjusted, extrusion force and friction force between the worm and the spanner opening are reduced to a great extent, finally, the adjustable spanner can rapidly rotate without blocking when the worm is rotated, and operation is quite labor-saving and smooth.

Description

Technical Field

[0001] This invention relates to the field of manual hardware tools, and more particularly to a method for unobstructed adjustment of a quick-release wrench. Background Technology

[0002] Currently, most commercially available quick-adjustable wrenches achieve rapid wrench opening adjustment through the up-and-down movement of a worm gear. For example, patent application CN202192574U, titled "A Quick-Adjustable Wrench," describes a structure where a worm gear is placed in a rectangular hole in the wrench head, with a pin inserted inside. Springs engage at both ends of the pin, and pushing the worm gear downwards compresses the springs, disengaging the worm gear from the wrench and allowing for rapid adjustment of the wrench opening. Releasing the worm gear causes the springs to return to their original position, re-engaging the worm gear with the wrench and clamping the workpiece. However, this type of quick-adjustable wrench has the following drawbacks in practical use: when manually rotating the worm gear to clamp a workpiece, the worm gear, already subjected to the upward force of the spring, is further subjected to the upward force of the fingers, resulting in a doubling of the squeezing and frictional forces between the worm gear and the bottom teeth of the wrench. This leads to excessive rotational resistance when clamping the workpiece, making the worm gear difficult to rotate, requiring considerable effort to operate, and negatively impacting the user experience. Currently, there is no effective solution to these problems.

[0003] In summary, how to reduce the rotational resistance of the worm gear when clamping a workpiece by manually rotating it upwards has become a technical problem that urgently needs to be solved in the industry. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides a method for unobstructed adjustment of a quick-release wrench, which solves the problems of excessive rotational resistance, difficulty in rotation, and laborious operation of the worm gear when manually rotating it upwards to clamp the workpiece.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A method for unobstructed adjustment of a quick-release adjustable wrench is disclosed. The adjustable wrench includes a wrench body and a wrench jaw. A round shaft is provided at the bottom of the wrench jaw and is inserted into a round hole in the wrench body, connecting to the wrench body. The bottom of the round shaft has teeth. A worm gear is provided in a square hole at the head of the wrench body, which mates with the teeth at the bottom of the round shaft. A left pin and a right pin are elastically mounted at both ends of the worm gear. Two vertical round holes are provided on both sides of the square hole. A slot is provided between the square hole and the two vertical round holes. The left and right pins slide up and down in the slot. A left spring and a right spring are respectively provided between the left and right pins and the bottom of the two vertical round holes. A set screw is provided at the top of each of the two vertical round holes. By adjusting the depth of the set screw, the upward stroke of the worm gear is adjusted, thereby adjusting the gap between the worm gear and the root of the teeth at the bottom of the wrench jaw, reducing the squeezing force and friction between the worm gear and the wrench jaw, allowing for unobstructed and rapid rotation of the worm gear.

[0006] When in use, when the worm is pulled down to the bottom edge of the square hole, the left and right pins slide downwards along the slots between the square hole and the two vertical round holes, respectively. The left and right springs are compressed, and the worm and the bottom teeth of the wrench separate. At this time, the wrench can be opened and closed freely to achieve rapid adjustment of the opening amount. After the worm is released, the left and right pins slide upwards synchronously under the action of the left and right springs, respectively. The set screw at the top of the vertical round hole limits the left and right pins.

[0007] The worm gear has a through hole in the middle, and a middle spring is installed in the through hole. The left and right pins are respectively movably inserted into the through holes at both ends of the middle spring.

[0008] The top of the vertical circular hole is provided with a threaded hole, and a set screw is provided in the threaded hole.

[0009] The toothed front end of the wrench has a boss at its bottom, which works with the worm to restrict the wrench.

[0010] The size of the boss is smaller than the size of the worm gear groove, and the distance between the boss and the adjacent tooth profile is greater than the worm gear pitch.

[0011] The present invention adopts the above-described solution and has the following beneficial effects: This invention, based on the rapid adjustment of the opening of the adjustable wrench, uses two set screws located at the top of the two vertical circular holes, directly above the left and right pins. By adjusting the depth of the set screws, the upward stroke of the worm can be adjusted, thus maintaining a certain gap between the worm and the root of the tooth at the bottom of the wrench mouth. This greatly reduces the squeezing force and friction between the worm and the wrench mouth, ultimately enabling the adjustable wrench to rotate rapidly and without obstruction when rotating the worm, making operation very effortless and smooth. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 This is a schematic cross-sectional view of the meshing state of the present invention.

[0014] Figure 3 This is a schematic cross-sectional view of the detached state of the present invention.

[0015] Figure 4 This is a cross-sectional schematic diagram of the interference state between the flange boss and the worm gear of the present invention.

[0016] Figure 5 This is a cross-sectional schematic diagram of the left and right pins of the present invention being limited by the set screws.

[0017] In the diagram, 1. Baffle body, 2. Baffle opening, 3. Tooth shape, 4. Square hole, 5. Worm gear, 6. Left pin, 7. Right pin, 8. Vertical round hole, 9. Left spring, 10. Right spring, 11. Set screw, 12. Middle spring, 13. Boss. Detailed Implementation

[0018] 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.

[0019] like Figure 1-5 As shown, a method for unobstructed adjustment of a quick-release adjustable wrench is disclosed. The adjustable wrench includes a wrench body 1 and a wrench jaw 2. A round shaft is provided at the bottom of the wrench jaw 2, which is inserted into the round hole of the wrench body 1 and connected to the wrench body. The bottom of the round shaft has a toothed shape 3. A worm gear 5 is provided in the square hole 4 at the head of the wrench body 1, which mates with the toothed shape 3 at the bottom of the round shaft. A left pin 6 and a right pin 7 are elastically installed at both ends of the worm gear 5. Two vertical round holes 8 are provided on both sides of the square hole 4. A slot is provided between the square hole 4 and the two vertical round holes 8. The left pin 6 and the right pin 7 slide up and down in the slot. A left spring 9 and a right spring 10 are provided between the left pin 6 and the right pin 7 and the bottom of the two vertical round holes 8, respectively. A set screw 11 is provided at the top of the two vertical round holes 8. By adjusting the depth of the set screw 11, the gap between the worm gear 5 and the root of the toothed shape 3 at the bottom of the wrench jaw 2 can be adjusted to reduce the squeezing force and friction between the worm gear 5 and the wrench jaw 2, so that the worm gear 5 can be rotated quickly and without obstruction.

[0020] The worm 5 has a through hole in the middle, and a middle spring 12 is installed in the through hole. The left pin 6 and the right pin 7 are respectively movably inserted into the through holes at both ends of the middle spring 12. When the worm 5 is installed into the square hole 4, the left pin 6 and the right pin 7 need to be squeezed into the through hole. After the worm 5 enters the square hole 4, the left pin 6 and the right pin 7 are ejected outward under the elastic force of the middle spring 12.

[0021] The top of the vertical circular hole 8 is provided with a threaded hole, and a set screw 11 is provided in the threaded hole. The depth of the set screw 11 in the threaded hole can be adjusted as needed.

[0022] The front end of the tooth profile 3 of the wrench 2 is provided with a boss 13. The boss 13 cooperates with the worm 5 to restrict the wrench 2. The size of the boss 13 is smaller than the size of the spiral groove of the worm 5. The distance between the boss 13 and the adjacent tooth profile 3 of the wrench 2 is greater than the pitch of the worm 5. When the opening of the wrench 2 is at its maximum, the boss 13 will interfere with the worm 5, preventing the wrench 2 from falling directly. At this time, by rotating the worm 5, the boss 13 will be screwed into the spiral groove of the worm 5. By continuing to rotate the worm 5, the wrench 2 can be screwed out.

[0023] Working principle: When in use, when the worm 5 is pulled down to the bottom edge of the square hole 4, the left pin 6 and the right pin 7 slide down along the slot between the square hole 4 and the two vertical round holes 8, respectively. The left spring 6 and the right spring 7 are compressed, and the worm 5 and the bottom tooth 3 of the wrench 2 are separated. At this time, the wrench 2 can be opened and closed freely to achieve rapid adjustment of the opening amount. After the worm 5 is released, the left pin 6 and the right pin 7 slide upward synchronously under the action of the left spring 9 and the right spring 10, respectively. The set screw 11 at the top of the vertical round hole 8 limits the left pin 6 and the right pin 7. By adjusting the depth of the set screw 11 in the threaded hole, the upward stroke of the worm 5 can be adjusted, thereby adjusting the gap between the worm 5 and the root of the bottom tooth 3 of the wrench 2. This allows a certain gap to be maintained between the worm 5 and the root of the bottom tooth 3 of the wrench 2 for meshing, reducing the squeezing force and friction between the worm 5 and the wrench 2. When rotating the worm 5, it can rotate quickly without obstruction, making the operation very effortless and smooth, restoring the normal function of the adjustable wrench.

[0024] 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.

[0025] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A method for unobstructed adjustment of a quick-release adjustable wrench, the adjustable wrench comprising a wrench body and a wrench jaw, wherein a round shaft is provided at the bottom of the wrench jaw and inserted into a round hole in the wrench body for connection to the wrench body, the round shaft having teeth at its bottom, and a worm gear engaging with the teeth at the bottom of the round shaft being provided in a square hole at the head of the wrench body, characterized in that: The worm gear has a left pin and a right pin elastically mounted at both ends. Two vertical circular holes are provided on both sides of the square hole. A slot is provided between the square hole and the two vertical circular holes. The left pin and the right pin slide up and down in the slot. A left spring and a right spring are respectively provided between the left pin and the bottom of the two vertical circular holes. A set screw is provided at the top of the two vertical circular holes. By adjusting the depth of the set screw, the upward stroke of the worm gear is adjusted, thereby adjusting the gap between the worm gear and the root of the tooth at the bottom of the wrench, so as to reduce the squeezing force and friction between the worm gear and the wrench, and enable the worm gear to rotate quickly without obstruction.

2. The method for unobstructed adjustment of a quick-release wrench according to claim 1, characterized in that: When in use, when the worm is pulled down to the bottom edge of the square hole, the left and right pins slide downwards along the slots between the square hole and the two vertical round holes, respectively. The left and right springs are compressed, and the worm and the bottom teeth of the wrench separate. At this time, the wrench can be opened and closed freely to achieve rapid adjustment of the opening amount. After the worm is released, the left and right pins slide upwards synchronously under the action of the left and right springs, respectively. The set screw at the top of the vertical round hole limits the left and right pins.

3. The method for unobstructed adjustment of a quick-release wrench according to claim 1, characterized in that: The worm gear has a through hole in the middle, and a middle spring is installed in the through hole. The left and right pins are respectively movably inserted into the through holes at both ends of the middle spring.

4. The method for unobstructed adjustment of a quick-release wrench according to claim 1, characterized in that: The top of the vertical circular hole is provided with a threaded hole, and a set screw is provided in the threaded hole.

5. The method for unobstructed adjustment of a quick-release wrench according to claim 1, characterized in that: The toothed front end of the wrench has a boss at its bottom, which works with the worm to restrict the wrench.

6. The method for unobstructed adjustment of a quick-release wrench according to claim 5, characterized in that: The size of the boss is smaller than the size of the worm gear groove, and the distance between the boss and the adjacent tooth profile is greater than the worm gear pitch.

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