Telescopic wrench
By designing a retractable wrench including longitudinal bars, hollow bars, control bars and adapters, the problem that existing wrench fixed lengths cannot adapt to narrow gaps is solved, and flexible adjustment and multi-purpose adaptation of wrench lengths are achieved, reducing tool cost and space consumption.
Patent Information
- Application Number
- CN202422205483.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The handle of the existing sleeve wrench is of a fixed length and cannot be stretched, resulting in the need to be equipped with special wrenches of different lengths when disassembling and assembling bolts in narrow gaps, resulting in a large number of tools, a large space and a high cost.
A retractable wrench including a longitudinal rod, a hollow rod, a control rod and a converter is designed. Through the cooperation of ratchets and pawls, the longitudinal rod and the hollow rod are used to form a retractable structure by using the pressing effect of the control rod.
It realizes flexible adjustment of the length of the wrench, adapts to the disassembly and assembly of bolts in various narrow gaps, reduces the type and space of tools, and reduces the cost of purchasing tools.
Smart Images
Figure CN223013024U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of tool hardware, and particularly relates to a telescopic wrench. Background Art
[0002] A wrench is a commonly used tool for screwing bolts and nuts. There are many types of wrenches. One type of wrench is a socket wrench. Socket wrenches can be further divided into T-shaped socket wrenches, L-shaped socket wrenches, etc. according to their shapes. Regardless of the shape of the socket wrench, its handle has a fixed length and cannot be telescoped. In many auto repair and maintenance work, it is often a difficult problem to disassemble and assemble bolts in narrow gaps.
[0003] In view of the above problems, the existing solution is to equip socket wrenches with corresponding lengths, usually choosing T-shaped socket wrenches with fixed lengths. For example, a 40-cm T-shaped socket wrench, a 70-cm T-shaped socket wrench, etc. Therefore, for different vehicle models and different positions, a special T-shaped socket wrench with a suitable length needs to be equipped respectively, resulting in too many special T-shaped socket wrenches in the repair workshop. Moreover, these special T-shaped socket wrenches are not commonly used, which not only occupies storage space but also increases the cost of maintenance tools. Content of the Utility Model
[0004] Aiming at the defects in the prior art, in order to increase the function of telescopic adjustment of the wrench, making it more versatile and convenient to use. The utility model provides a telescopic wrench, which includes a longitudinal rod, a hollow rod, a control rod and a conversion joint; the conversion joint is fixedly connected to the lower end of the hollow rod, and an opening communicating with the inner cavity is provided at the upper end of the hollow rod. The longitudinal rod extends into the hollow rod from the opening, so that the longitudinal rod and the hollow rod form a telescopic structure; a through hole is provided along the central axis of the longitudinal rod, the control rod extends from the upper end of the through hole to the lower end of the through hole, and a first spring for pushing the control rod upward is provided in the through hole; the cross sections of the longitudinal rod and the inner cavity of the hollow rod are both square, and a row of longitudinally arranged ratchet teeth is provided on one side of the inner cavity of the hollow rod, and a ratchet claw that can swing and corresponds to the ratchet teeth is provided at the lower end of the longitudinal rod; the lower end of the control rod is opposite to the ratchet claw, and by pressing down the control rod and squeezing the ratchet claw, the ratchet teeth and the ratchet claw are separated.
[0005] The beneficial effect of this device is that the longitudinal rod and the hollow rod form a telescopic structure, and the length can be adjusted at any time according to needs. The specific adjustment method is to press the upper end of the control rod to separate the ratchet teeth from the ratchet claw, and then the longitudinal rod can freely extend or retract relative to the hollow rod. After adjusting to the appropriate length, release the control rod, and the ratchet claw will catch the ratchet teeth again to keep the current length of the longitudinal rod and the hollow rod unchanged. The length adjustment is very simple and convenient to operate, and it can adapt to the disassembly and assembly of bolts in various narrow gaps, realizing the multi-purpose use of one wrench, thus avoiding the problems of too many wrenches and occupying storage space caused by equipped with a special wrench for each narrow gap of each vehicle model, and reducing the cost of purchasing tools.
[0006] Preferably, a vacancy corresponding to the ratchet teeth is provided on the side of the lower part of the longitudinal rod. The vacancy is the space reserved for the longitudinal rod to slide in the hollow rod, preventing the ratchet teeth from touching the side wall of the hollow rod.
[0007] Preferably, the lower part of the control rod is located at the lower limit baffle at the lower end of the longitudinal rod. The lower limit baffle is to limit the highest point of the upward movement of the control rod, preventing the control rod from falling off from the through hole during use.
[0008] Preferably, a hinge bracket is provided at the lower end of the longitudinal rod. The middle part of the pawl is hinged to the hinge bracket through a hinge shaft. One end of the pawl is connected to the longitudinal rod through a second spring, and the other end of the pawl contacts the ratchet teeth. The lower end of the control rod contacts the pawl. The hinge shaft is adjacent to the second spring and is located on one side of the control rod. The swing of the pawl is restricted by the control rod, thereby restricting the relative sliding of the longitudinal rod and the hollow rod. The hinge bracket is located between the second spring and the control rod. Pressing the control rod pushes open the pawl, and the pawl rotates clockwise around the hinge shaft and compresses the second spring. At this time, the pawl and the ratchet teeth are separated, and the longitudinal rod is unlocked. Releasing the control rod, under the elastic force of the second spring and the first spring, the pawl pushes the control rod to move upward and reset. At this time, the pawl and the ratchet teeth contact, and the longitudinal rod is locked.
[0009] Preferably, the upper end of the longitudinal rod extends out of the hollow rod and a transverse rod is provided at the upper end of the longitudinal rod, so that the longitudinal rod and the transverse rod form a T-shaped rod. The transverse rod is convenient for manually screwing the longitudinal rod, and the usage method is the same as that of the existing T-shaped wrench.
[0010] Preferably, a button connected to the upper end of the control rod is provided at the upper end of the longitudinal rod.
[0011] Preferably, a first sinking groove coaxial with the through hole is provided at the upper end of the longitudinal rod. The first spring is located in the first sinking groove and sleeved on the control rod. An upper limit baffle pressing against the upper end of the first spring is provided on the upper part of the control rod. A second sinking groove communicating with the first sinking groove is provided at the upper end of the longitudinal rod. The lower part of the button is located in the second sinking groove. The first sinking groove is used to install the first spring, and the second sinking groove is to limit the movement direction of the button, preventing the button from being misaligned.
[0012] Preferably, rounded corners are provided at both ends of the upper end of the longitudinal rod and the hollow rod. The rounded corners can make the outside of the wrench have no sharp edges, sawteeth, etc., ensuring safe use. Description of the Drawings
[0013] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0014] Figure 1 Structural schematic diagram of this embodiment;
[0015] Figure 2 For Figure 1 Internal structural schematic diagram of;
[0016] Figure 3 For Figure 2 Schematic diagram after the longitudinal rod extends out in;
[0017] Figure 4 For Figure 2 Enlarged view of part A in;
[0018] Figure 5 For Figure 4 Schematic diagram after the pawl and ratchet are separated in;
[0019] Figure 6 For Figure 2 Enlarged view of part B in;
[0020] Figure 7 For Figure 1 Stereogram of.
[0021] In the drawings, longitudinal rod 1, hollow rod 2, control rod 3, adapter 4, transverse rod 5, vacant position 7, through hole 8, first spring 9, first sink 10, button 11, upper limit baffle 12, second sink 13, ratchet 14, pawl 15, lower limit baffle 16, hinge bracket 17, hinge shaft 18, second spring 19. Specific embodiments
[0022] The following will describe in detail the embodiments of the technical solutions of the present utility model with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.
[0023] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.
[0024] Such as Figure 1 And Figure 7As shown in the figure, this embodiment provides a telescopic wrench, which includes a longitudinal rod 1, a hollow rod 2, a control rod 3 and a conversion joint 4. Among them, a transverse rod 5 is provided at the upper end of the longitudinal rod 1, so that the longitudinal rod 1 and the transverse rod 5 form a T-shaped rod. The transverse rod 5 is convenient for manually turning the longitudinal rod 1, and the usage method is the same as that of the existing T-shaped wrench.
[0025] As Figure 1 , Figure 2 and Figure 3 shown, the conversion joint 4 is fixedly connected to the lower end of the hollow rod 2. The conversion joint 4 can be disassembled and assembled with the existing socket head. Select a suitable socket head according to different types of nuts, and then connect it to the conversion joint 4. The usage method is the same as that of the existing conversion joint 4. An opening communicating with the inner cavity is provided at the upper end of the hollow rod 2, and the longitudinal rod 1 extends into the hollow rod 2 from the opening, so that the longitudinal rod 1 and the hollow rod 2 form a telescopic structure. In order to prevent the longitudinal rod 1 from being pulled out randomly, in this embodiment, the unlocking and locking of the longitudinal rod 1 are realized through the control rod 3, and the specific structure is as follows:
[0026] As Figure 2 and Figure 6 shown, the cross-section of the longitudinal rod 1 and the cross-section of the inner cavity of the hollow rod 2 in this embodiment are both square. A row of longitudinally arranged ratchet teeth 14 is provided on one side of the inner cavity of the hollow rod 2, and a vacant position 7 corresponding to the ratchet teeth 14 is provided on the side of the lower part of the longitudinal rod 1. The vacant position 7 is the space reserved for the longitudinal rod 1 to slide in the hollow rod 2 to prevent the ratchet teeth 14 from touching the side wall of the hollow rod 2. A through hole 8 is provided along the central axis of the longitudinal rod 1. The control rod 3 extends from the upper end of the through hole 8 to the lower end of the through hole 8, and a first spring 9 for pushing the control rod 3 upward is provided in the through hole 8. Specifically, a first sink 10 coaxial with the through hole 8 is provided at the upper end of the longitudinal rod 1, and a button 11 connected to the upper end of the control rod 3 is provided at the upper end of the longitudinal rod 1. The first spring 9 is located in the first sink 10 and sleeved on the control rod 3. An upper limit baffle 12 that abuts against the upper end of the first spring 9 is provided on the upper part of the control rod 3. A second sink 13 communicating with the first sink 10 is provided at the upper end of the longitudinal rod 1, and the lower part of the button 11 is located in the second sink 13. The first sink 10 is used to install the first spring 9, and the second sink 13 is to limit the movement direction of the button 11 to prevent the button 11 from being misaligned.
[0027] As Figure 1 , Figure 4 and Figure 5As shown in the figure, at the lower end of the longitudinal rod 1, there is a swingable pawl 15 corresponding to the ratchet teeth 14, and the lower part of the control rod 3 is located at the lower limit baffle 16 at the lower end of the longitudinal rod 1. The lower limit baffle 16 is the highest point that restricts the upward movement of the control rod 3 to prevent the control rod 3 from falling off from the through hole 8 during use. The lower end of the control rod 3 is directly opposite to the pawl 15. By pressing down the control rod 3 and squeezing the pawl 15, the ratchet teeth 14 and the pawl 15 are separated. Specifically, at the lower end of the longitudinal rod 1, there is a hinge bracket 17. The middle part of the pawl 15 is hinged to the hinge bracket 17 through a hinge shaft 18. One end of the pawl 15 is connected to the longitudinal rod 1 through a second spring 19, and the other end of the pawl 15 contacts the ratchet teeth 14. The lower end of the control rod 3 contacts the pawl 15. The hinge shaft 18 is adjacent to the second spring 19 and is located on one side of the control rod 3. By the control rod 3, the swing of the pawl 15 is restricted, and thus the relative sliding of the longitudinal rod 1 and the hollow rod 2 is restricted. The hinge bracket 17 is located between the second spring 19 and the control rod 3. When the control rod 3 is pressed down, the pawl 15 is pushed open. The pawl 15 rotates clockwise around the hinge shaft 18 and squeezes the second spring 19. At this time, the pawl 15 and the ratchet teeth 14 are separated, and the longitudinal rod 1 is unlocked. When the control rod 3 is released, under the elastic force of the second spring 19 and the first spring 9, the pawl 15 pushes the control rod 3 to move upward and reset. At this time, the pawl 15 and the ratchet teeth 14 contact, and the longitudinal rod 1 is locked.
[0028] As Figure 7 shown, the upper end of the longitudinal rod 1 and both ends of the hollow rod 2 in this embodiment are exposed, so fillets are provided at these positions. The fillets can make the outside of the wrench have no sharp edges, sawteeth, etc., and it is safe to use.
[0029] During the actual use process, the button 11 can be held down at any time to adjust the length of the longitudinal rod 1 extended. After adjusting to the appropriate length, the button 11 is released. The pawl 15 is at the ratchet teeth 14 to keep the length of the longitudinal rod 1 extended. Then, a socket head adapted to the nut is selected and connected to the lower end of the adapter 4. Finally, the socket head is extended into the nut at the narrow place, and the longitudinal rod 1 is rotated through the transverse rod 5 to disassemble and assemble the nut, and the operation is simple.
[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.
Claims
1. A retractable wrench, characterized in that: It includes a longitudinal rod, a hollow rod, a control rod and a conversion joint; the conversion joint is fixedly connected to the lower end of the hollow rod, the upper end of the hollow rod is provided with an opening connected to the inner cavity, the longitudinal rod extends into the hollow rod from the opening, so that the longitudinal rod and the hollow rod form a retractable structure; a through hole is provided along the central axis of the longitudinal rod, the control rod extends from the upper end of the through hole to the lower end of the through hole, and a first spring for pushing the control rod upward is provided in the through hole; the cross-section of the longitudinal rod and the cross-section of the inner cavity of the hollow rod are both square, a side surface of the inner cavity of the hollow rod is provided with a row of ratchet teeth arranged longitudinally, and the lower end of the longitudinal rod is provided with a swingable ratchet corresponding to the ratchet teeth; the lower end of the control rod is directly opposite to the ratchet, and the ratchet teeth are separated from the ratchet teeth by pressing down the control rod and squeezing the ratchet teeth.
2. A retractable wrench according to claim 1, characterized in that: A vacant space corresponding to the ratchet teeth is arranged on the side surface of the lower part of the longitudinal rod.
3. A retractable wrench according to claim 1, characterized in that: The lower part of the control rod is located at the lower limit baffle at the lower end of the longitudinal rod.
4. A retractable wrench according to claim 1, characterized in that: The lower end of the longitudinal rod is provided with an articulated bracket, the middle part of the pawl is hinged to the articulated bracket through an articulated shaft, one end of the pawl is connected to the longitudinal rod through a second spring, and the other end of the pawl is in contact with the ratchet.
5. A retractable wrench according to claim 4, characterized in that: The lower end of the control rod is in contact with the pawl, and the hinge shaft is adjacent to the second spring and is located on one side of the control rod. The control rod limits the swing of the pawl, thereby limiting the relative sliding of the longitudinal rod and the hollow rod.
6. A retractable wrench according to claim 1, characterized in that: The upper end of the longitudinal rod extends out of the hollow rod and the upper end of the longitudinal rod is provided with a transverse rod, so that the longitudinal rod and the transverse rod form a T-shaped rod.
7. A retractable wrench according to claim 1, characterized in that: The upper end of the longitudinal rod is provided with a button connected with the upper end of the control rod.
8. A retractable wrench according to claim 7, characterized in that: The upper end of the longitudinal rod is provided with a first recessed groove coaxial with the through hole, the first spring is located in the first recessed groove and sleeved on the control rod, and the upper part of the control rod is provided with an upper limit baffle pressed against the upper end of the first spring.
9. A retractable wrench according to claim 8, characterized in that: The upper end of the longitudinal rod is provided with a second sinking groove communicated with the first sinking groove, and the lower part of the button is located in the second sinking groove.
10. The retractable wrench according to claim 1, characterized in that: The upper end of the longitudinal rod and both ends of the hollow rod are provided with rounded corners.