Wrench structure convenient to disassemble and used for automobile maintenance

Abstract

The utility model discloses a convenient disassembly wrench structure for automobile maintenance, which relates to the technical field of maintenance wrenches and comprises a grip, a fixed wrench head is fixedly connected to the top of the outer wall of the grip, a movable wrench head is arranged at the top of the outer wall of the grip, and a plurality of scale marks are arranged on two sides of the outer wall of the grip. A plurality of pointing grooves are formed in the two sides of the outer wall of the movable wrench head, a plurality of locking guide rails are fixedly connected to the two sides of the inner wall of the grip, a sliding metal piece is slidably connected to an inner cavity of the grip, a plurality of clamping grooves are formed in the outer wall of the bottom end of the sliding metal piece, and a plurality of limiting guide rails are fixedly connected to the two sides of the inner wall of the grip; the abutting metal piece is pushed through the compression spring, the clamping teeth on the top of the abutting metal piece and the clamping groove in the bottom of the sliding metal piece can form a mutual locking structure, reverse thrust generated by the movable wrench heads during operation is directly offset, and even if external torque is continuously increased, the distance between the movable wrench heads cannot be slowly changed due to self-locking failure of the worm.

Description

Technical Field

[0001] This utility model relates to the field of repair wrench technology, specifically a convenient disassembly wrench structure for automotive repair. Background Technology

[0002] Wrenches are basic tools used in automotive repair for tightening or loosening bolts and nuts. Common types include open-end wrenches, box wrenches, and socket wrenches. Open-end wrenches have fixed-size openings at both ends, suitable for operation in open spaces. Box wrenches have a ring around the nut, providing better anti-slip performance. Socket wrenches, used with extension bars, can reach into narrow or recessed areas. They are mostly made of high-strength steel, balancing durability and wear resistance, and are commonly used tools in automotive repair for tasks such as tire removal and engine component adjustments.

[0003] According to the search, Chinese patent document, publication number CN222405440U, discloses an adjustable wrench with an extension structure, including a handle, a fixed wrench head, a movable wrench head, and a transmission worm gear. The fixed wrench head is provided at one end of the handle, and the movable wrench head is provided inside the fixed wrench head. The transmission worm gear is embedded in the handle near the movable wrench head. By rotating the transmission worm gear, the movable wrench head is moved to a different position. The inner walls of both the fixed wrench head and the movable wrench head are provided with teeth. This adjustable wrench with an extension structure has a connecting sleeve on the outside of the handle that can be pulled outward and limited.

[0004] To match hexagonal nuts of different sizes, the aforementioned devices typically use a worm gear to adjust the distance between the movable and fixed wrench heads. However, these worm gears have a defined threshold for self-locking capability. When the applied torque exceeds this threshold, the worm gear's self-locking function will temporarily fail, causing the movable wrench head to slowly retract. The originally matched nut size gradually becomes misaligned, resulting in decreased wrench clamping stability and potential scratches on the nut surface. In some cases, the wrench may even slip off the nut due to a sudden loss of clamping ability. Therefore, we provide a convenient disassembly wrench structure for automotive repair. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a convenient disassembly wrench structure for automobile repair.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a convenient disassembly wrench structure for automotive repair, comprising a handle, a fixed wrench head fixedly connected to the top of the outer wall of the handle, and a movable wrench head simultaneously provided at the top of the outer wall of the handle; multiple scale lines are provided on both sides of the outer wall of the handle; multiple guide grooves are provided on both sides of the outer wall of the movable wrench head; multiple locking guide rails are fixedly connected to both sides of the inner wall of the handle; a sliding metal part is slidably connected to the inner cavity of the handle; multiple slots are provided on the bottom outer wall of the sliding metal part; multiple limiting guide rails are fixedly connected to both sides of the inner wall of the handle; and a contact metal part is slidably connected to the center of the inner cavity of the handle; multiple locking teeth are added to the top outer wall of the contact metal part; multiple compression springs are provided on the bottom surface of the contact metal part; multiple sealing grooves are provided on both sides of the inner interior of the contact metal part; and sealing plates are added to both sides of the inner interior of the handle.

[0007] As mentioned above, the pointing groove corresponds to the scale lines opened on the outer wall of the grip.

[0008] As described above, the outer wall of the bottom end of the movable wrench head is fixedly connected to the outer wall of the top end of the sliding metal part, and the corresponding surfaces of the movable wrench head and the fixed wrench head are parallel to each other.

[0009] As described above, one end of the outer wall of the locking guide rail penetrates through one side of the interior of the sliding metal part, and multiple outer walls of the locking guide rail are respectively located on both sides of the interior of the sliding metal part. The outer wall of the locking guide rail is in close contact with the inner wall of the sliding metal part, and the outer wall of the locking guide rail is slidably connected to the inner wall of the sliding metal part.

[0010] As described above, the top of the outer wall of the limiting guide rail passes through one side of the inner side of the contact metal part, and the top of the outer wall of the limiting guide rail is slidably connected to one side of the inner side of the contact metal part. The multiple limiting guide rails are respectively located on both sides of the outer wall of the contact metal part.

[0011] As described above, the outer walls of both ends of the compression spring abut against the bottom surface of the contacting metal part and the inner wall of the grip, respectively. The outer wall of the locking tooth is embedded in the slot, and the outer wall of the locking tooth is engaged with the inner wall of the slot.

[0012] As described above, the top of the outer wall of the sealing plate extends into the interior of the sealing groove, and the top of the outer wall of the sealing plate is slidably connected to the interior of the sealing groove.

[0013] Compared with existing technologies, this convenient disassembly wrench structure for automotive repair has the following advantages:

[0014] I. This utility model uses a compression spring to push the abutting metal part. The locking teeth on the top of the abutting metal part and the locking groove on the bottom of the sliding metal part form an interlocking structure, which directly counteracts the reverse thrust generated by the movable wrench head during operation. This ensures that the distance between the movable wrench head and the fixed wrench head always matches the size of the target nut. While improving the clamping stability, it also prevents the nut surface from being scratched due to the misalignment of the movable wrench head, and can effectively prevent the tool from flying out due to the sudden slippage of the movable wrench head and the nut.

[0015] Second, by placing the sealing plate and sealing groove on both sides of the compression spring, this utility model can effectively prevent metal shavings or dust from easily seeping into the interior through the handle opening in automotive repair scenarios, and prevent external stains and dust from adhering to the outer wall of the compression spring, thus avoiding adverse effects on the extension and contraction of the compression spring.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the tooth and groove of this utility model;

[0019] Figure 3 This is a partial three-dimensional structural diagram of the movable wrench head of this utility model;

[0020] Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the sealing groove and sealing plate of this utility model.

[0021] In the diagram: 1. Handle; 101. Fixed wrench head; 102. Movable wrench head; 103. Scale line; 104. Pointer groove; 2. Locking guide rail; 201. Sliding metal part; 202. Slot; 203. Limiting guide rail; 204. Abutting metal part; 205. Locking tooth; 206. Compression spring; 3. Sealing groove; 301. Sealing plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-4 As shown, this utility model provides a technical solution: a convenient disassembly wrench structure for automotive repair, including a handle 1, a fixed wrench head 101 fixedly connected to the top of the outer wall of the handle 1, and a movable wrench head 102 also provided at the top of the outer wall of the handle 1. Multiple scale lines 103 are provided on both sides of the outer wall of the handle 1, and multiple guide grooves 104 are provided on both sides of the outer wall of the movable wrench head 102. Multiple locking guide rails 2 are fixedly connected to both sides of the inner wall of the handle 1, and a sliding metal slidably connected to the inner cavity of the handle 1. Part 201, the sliding metal part 201 has multiple slots 202 on the outer wall of its bottom end, multiple limiting guide rails 203 are fixedly connected to both sides of the inner wall of the handle 1, and a contact metal part 204 is slidably connected to the center of the inner cavity of the handle 1. Multiple teeth 205 are added to the outer wall of the top of the contact metal part 204, and multiple compression springs 206 are provided on the bottom surface of the contact metal part 204. Multiple closed grooves 3 are opened on both sides of the inner interior of the contact metal part 204, and sealing plates 301 are added to both sides of the inner interior of the handle 1.

[0024] By compressing the spring 206 to push the abutting metal part 204, the locking teeth 205 on the top of the abutting metal part 204 will form a locking structure with the locking groove 202 at the bottom of the sliding metal part 201, directly offsetting the reverse thrust generated by the movable wrench head 102 during operation. Even if the external torque continues to increase, the distance between the movable wrench head 102 will not change slowly due to the failure of the worm gear self-locking, ensuring that the distance between the movable wrench head 102 and the fixed wrench head 101 always matches the target nut size.

[0025] like Figure 1 and Figure 4 As shown, the pointing groove 104 corresponds to the scale line 103 opened on the outer wall of the grip 1.

[0026] The guide groove 104 corresponds to the scale line 103. When the maintenance personnel adjust the movable wrench 102, they only need to observe the scale line 103 pointed to by the guide groove 104 to quickly confirm the current wrench spacing and avoid repeated trial and error adjustments.

[0027] like Figure 2 As shown, the bottom outer wall of the movable wrench 102 is fixedly connected to the top outer wall of the sliding metal part 201, and the corresponding surfaces of the movable wrench 102 and the fixed wrench 101 are parallel to each other.

[0028] The movable wrench head 102 is fixedly connected to the sliding metal part 201, and the corresponding surfaces of the movable wrench head 102 and the fixed wrench head 101 are parallel, which can ensure that the force on both sides is even when clamping the nut, thus avoiding the nut from slipping off or the surface from being scratched due to the tilt of the movable wrench head 102.

[0029] like Figure 2As shown, one end of the outer wall of the locking guide rail 2 penetrates through one side of the interior of the sliding metal part 201, and the outer walls of multiple locking guide rails 2 are respectively located on both sides of the interior of the sliding metal part 201. The outer walls of the locking guide rails 2 are tightly fitted with the inner wall of the sliding metal part 201, and the outer walls of the locking guide rails 2 are slidably connected to the inner wall of the sliding metal part 201.

[0030] The locking guide rail 2 runs through both sides of the sliding metal part 201 and fits tightly, which can limit the offset or shaking of the sliding metal part 201 during the displacement process, and ensure that the movable wrench 102 can only slide smoothly along the preset path.

[0031] like Figure 2 As shown, the top of the outer wall of the limiting guide rail 203 passes through one side of the inner side of the contact metal part 204, and the top of the outer wall of the limiting guide rail 203 is slidably connected to one side of the inner side of the contact metal part 204. Multiple limiting guide rails 203 are located on both sides of the outer wall of the contact metal part 204.

[0032] The limiting guide rail 203 passes through both sides of the contact metal part 204 and slides to prevent the contact metal part 204 from tilting or getting stuck when moving, and ensures that the locking teeth 205 on its top are precisely aligned with the locking groove 202 of the sliding metal part 201.

[0033] like Figure 2 As shown, the outer walls of both ends of the compression spring 206 abut against the bottom surface of the contact metal part 204 and the inner wall of the handle 1, respectively. The outer wall of the locking tooth 205 is embedded in the slot 202, and the outer wall of the locking tooth 205 is engaged with the inner wall of the slot 202.

[0034] The compression spring 206 continuously pushes upward against the metal part 204 through its elastic force, so that the locking teeth 205 are tightly embedded in the locking groove 202, thereby achieving automatic locking.

[0035] like Figure 4 As shown, the top of the outer wall of the sealing plate 301 extends into the interior of the sealing groove 3, and the top of the outer wall of the sealing plate 301 is slidably connected to the interior of the sealing groove 3.

[0036] The top of the sealing plate 301 extends into the closed groove 3 and is slidably connected, which can effectively prevent dust and other impurities commonly encountered in maintenance scenarios from entering the inner cavity of the handle 1.

[0037] Working principle: The guide groove 104 corresponds to the scale line 103. When adjusting the movable wrench 102, the maintenance personnel only need to observe the scale line 103 pointed to by the guide groove 104 to quickly confirm the current wrench spacing, avoiding repeated trial and error adjustments. The movable wrench 102 is fixedly connected to the sliding metal part 201, and the corresponding surfaces of the movable wrench 102 and the fixed wrench 101 are parallel, which can ensure that the force on both sides is even when clamping the nut, thus avoiding the nut slipping or surface scratching caused by the tilt of the movable wrench 102. The locking guide rail 2 passes through both sides of the sliding metal part 201 and fits tightly, which can restrict the movement of the sliding metal part 201 during the displacement process. The offset or shaking in the movement ensures that the movable wrench 102 can only slide smoothly along the preset path. The limiting guide rail 203 passes through both sides of the contact metal part 204 and slides to prevent the contact metal part 204 from tilting or getting stuck when moving. It ensures that the locking teeth 205 on its top are precisely aligned with the slots 202 of the sliding metal part 201. The compression spring 206 continuously pushes the contact metal part 204 upward with its elastic force, so that the locking teeth 205 are tightly embedded in the slots 202, achieving automatic locking. The top of the sealing plate 301 extends into the closed groove 3 and slides to effectively block dust and other impurities commonly found in maintenance scenarios from entering the inner cavity of the handle 1.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A convenient disassembly wrench structure for automotive repair, comprising a handle (1), characterized in that: A fixed wrench (101) is fixedly connected to the top of the outer wall of the handle (1), and a movable wrench (102) is also provided on the top of the outer wall of the handle (1). Multiple scale lines (103) are opened on both sides of the outer wall of the handle (1). Multiple guide grooves (104) are opened on both sides of the outer wall of the movable wrench (102). Multiple locking guide rails (2) are fixedly connected to both sides of the inner wall of the handle (1), and a sliding metal part (201) is slidably connected to the inner cavity of the handle (1). The bottom outer wall of the sliding metal part (201) is opened The grip (1) is provided with multiple slots (202), and multiple limiting guide rails (203) are fixedly connected to both sides of the inner wall of the grip (1). A metal abutment (204) is slidably connected to the center of the inner cavity of the grip (1). Multiple teeth (205) are added to the outer wall of the top of the metal abutment (204), and multiple compression springs (206) are provided on the bottom surface of the metal abutment (204). Multiple closed slots (3) are opened on both sides of the inner interior of the metal abutment (204), and sealing plates (301) are added on both sides of the inner interior of the grip (1).

2. The structure of a convenient disassembly wrench for automotive repair according to claim 1, characterized in that: The pointing groove (104) corresponds to the scale line (103) on the outer wall of the grip (1).

3. The structure of a convenient disassembly wrench for automotive repair according to claim 1, characterized in that: The bottom outer wall of the movable wrench (102) is fixedly connected to the top outer wall of the sliding metal part (201), and the corresponding surfaces of the movable wrench (102) and the fixed wrench (101) are parallel to each other.

4. The structure of a convenient disassembly wrench for automotive repair according to claim 1, characterized in that: One end of the outer wall of the locking guide (2) penetrates through one side of the interior of the sliding metal part (201), and the outer walls of multiple locking guides (2) are located on both sides of the interior of the sliding metal part (201). The outer wall of the locking guide (2) is in close contact with the inner wall of the sliding metal part (201), and the outer wall of the locking guide (2) is slidably connected to the inner wall of the sliding metal part (201).

5. The structure of a convenient disassembly wrench for automotive repair according to claim 1, characterized in that: The top of the outer wall of the limiting guide rail (203) passes through one side of the interior of the contact metal part (204), and the top of the outer wall of the limiting guide rail (203) is slidably connected to one side of the interior of the contact metal part (204). The multiple limiting guide rails (203) are located on both sides of the outer wall of the contact metal part (204).

6. The structure of a convenient disassembly wrench for automotive repair according to claim 1, characterized in that: The outer walls of both ends of the compression spring (206) abut against the bottom surface of the contact metal part (204) and the inner wall of the handle (1), respectively. The outer wall of the locking tooth (205) is embedded in the slot (202), and the outer wall of the locking tooth (205) is engaged with the inner wall of the slot (202).

7. The structure of a convenient disassembly wrench for automotive repair according to claim 1, characterized in that: The top of the outer wall of the sealing plate (301) extends into the interior of the sealing groove (3), and the top of the outer wall of the sealing plate (301) is slidably connected to the interior of the sealing groove (3).

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