Wrench with adjustable force arm

Abstract

The utility model discloses a spanner with an adjustable force arm, which comprises a spanner main body and a rotary force arm, a clamping hole is arranged on the spanner main body, the spanner main body is in a short cylindrical shape, and the front end of the rotary force arm is slidably mounted on the spanner main body along the circumference of the side surface of the spanner main body through a sliding mechanism. A limiting mechanism used for limiting the sliding mechanism is arranged between the wrench body and the rotating force arm. The rotating force arm slides on the wrench main body through the sliding mechanism and is limited by the limiting mechanism after sliding, so that after the whole rotating force arm rotates by a certain angle, the wrench main body does not need to be separated from a bolt and clamped again, and only the position of the rotating force arm on the wrench main body needs to be controlled; therefore, when in use, the rotary dismounting device disclosed by the utility model is convenient to operate, and the working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a wrench, in particular to a wrench with adjustable force arm. Background Art

[0002] Wrenches are often used for installation and disassembly work. They use the principle of leverage to engage the wrench head at the top of the bolt, nut or screw, and then control the force arm of the entire handle to apply external force along the direction of thread rotation, so as to achieve the effect of disassembling bolts, etc.

[0003] Bolts and screws currently on the market are generally used to install two parts. During installation, due to the limited installation space, the head of a traditional wrench is engaged with the bolt and rotated to a certain angle. The entire wrench needs to be separated from the bolt, and then the head is engaged with the bolt before it can be rotated again for disassembly. During the entire bolt disassembly work, the wrench and the bolt are frequently disassembled and assembled, which is troublesome to operate and has low work efficiency. Utility Model Content

[0004] The utility model aims to provide a lever arm adjustable wrench which has simple structure, low cost, convenient operation and can improve work efficiency.

[0005] The purpose of the utility model is achieved through the following technical measures: a wrench with adjustable lever arm, comprising a wrench body and a rotating lever arm, wherein a snap-fit ​​hole is provided on the wrench body, and wherein the wrench body is a short cylindrical shape, and the front end of the rotating lever arm is slidably mounted thereon along the side circumference of the wrench body through a sliding mechanism, and a limiting mechanism for limiting the sliding mechanism is provided between the wrench body and the rotating lever arm.

[0006] The rotating force arm of the utility model slides on the wrench body through the sliding mechanism, and is limited by the limiting mechanism after sliding. Therefore, when the entire rotating force arm is rotated by a certain angle, there is no need to separate the wrench body from the bolt and engage it again. It is only necessary to control the position of the rotating force arm on the wrench body to rotate and disassemble it again. Therefore, when the utility model is used, it is easy to operate and can improve work efficiency.

[0007] The sliding mechanism of the utility model adopts an arc-shaped block-shaped sliding block, the sliding block is connected to the rotating force arm, and the sliding block can slide along the side circumference of the wrench body through the cooperation of the sliding rail and the sliding groove.

[0008] The limiting mechanism of the utility model comprises a limiting plate, a fixed block, a limiting block and a spring, the limiting plate being arranged on the end edge of the wrench body and distributed along its circumference, a limiting groove being formed between two adjacent limiting plates, the rotating force arm being composed of a movable force arm and a fixed force arm, the movable force arm being arranged on the fixed force arm along the length direction thereof, one end of the movable force arm being hinged to the fixed force arm, and a limiting block being arranged at the other end, the fixed block being connected to the fixed force arm, the sliding block being a pair and respectively connected to both sides of the fixed block, a movable groove being arranged on the fixed block, the limiting block being composed of an upper and lower part, one part being adapted to the movable groove and a spring being arranged between the part and the movable groove, and the other part being connected to the movable force arm and adapted to the limiting groove.

[0009] The slider of the utility model is rotatably connected to the fixed block so that the fixed block can rotate relative to the slider. The fixed block is located between the two sliding blocks and can rotate relative to the slider. Therefore, when the wrench is in use, when the wrench cannot rotate in the horizontal axis, the fixed block can be rotated to drive the rotation arm angle to work, thereby controlling the entire wrench body to rotate at multiple angles, so that the position of the rotation arm can be flexibly adjusted, so the utility model has a wider range of uses.

[0010] The engaging hole on the wrench body of the utility model is located in the middle position thereof and is a regular polygonal hole, which penetrates the wrench body axially, the limiting plates are located on the two end edges of the wrench body and the limiting plates at the two ends correspond to each other, so that an arc groove for sliding of the slider is formed between the limiting plates at the two ends, and limiting grooves are respectively formed between the adjacent limiting plates at the two ends, the movable force arms are a pair and are respectively located on the upper surface and the lower surface of the fixed force arms, the movable grooves of the fixed blocks are a pair and correspond to each other up and down, the limiting blocks are a pair, each limiting block is arranged on a movable force arm, a part of each limiting block is adapted to a movable groove and a spring is arranged between the part and the movable groove, and the other part is connected to the movable force arm and adapted to the limiting groove corresponding thereto.

[0011] The fixed force arm and the fixed block of the utility model are made in one piece.

[0012] Compared with the prior art, the utility model has the following significant effects:

[0013] ⑴ The rotating force arm of the utility model slides on the wrench body through the sliding mechanism, and is limited by the limiting mechanism after sliding. Therefore, when the entire rotating force arm is rotated by a certain angle, there is no need to separate the wrench body from the bolt and engage it again. It is only necessary to control the position of the rotating force arm on the wrench body to rotate and disassemble it again. Therefore, the utility model is easy to operate when in use and can improve work efficiency.

[0014] (2) The fixed block of the utility model is located in the middle of the two sliding blocks and can rotate relative to the sliding blocks. Therefore, when the wrench is in use, when the wrench cannot rotate in the horizontal axis, the fixed block can be rotated to drive the angle of the rotating lever arm to work. In this way, the entire wrench body can be controlled to rotate at multiple angles, so that the position of the rotating lever arm can be flexibly adjusted. Therefore, the utility model has a wider range of uses.

[0015] (3) The utility model has the advantages of simple structure, low manufacturing cost and strong practicability, and is suitable for wide promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the main body of the wrench of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the sliding mechanism and the limiting mechanism of the utility model;

[0020] Figure 4 It is a half-section schematic diagram of the limiting mechanism of the utility model.

[0021] In the figure: 1. rotating lever arm; 11. movable lever arm; 12. fixed lever arm; 2. wrench body; 21. limit plate; 22. engaging hole; 23. limit groove; 24. arc groove; 25. slide groove; 3. sliding mechanism; 4. limit block; 5. fixed block; 51. movable groove; 6. slider; 61. slide rail; 7. rotating shaft; 8. spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 4As shown, the utility model is a wrench with adjustable lever arm, comprising a wrench body 2 and a rotating lever arm 1. The wrench body 2 is short cylindrical, and a clamping hole 22 is provided on the wrench body 2. The clamping hole 22 is a regular hexagonal hole, which penetrates the wrench body 2 axially, and the clamping hole 22 is used to clamp with the top of a bolt, nut or screw. The front end of the rotating lever arm 1 is slidably mounted on the side circumference of the wrench body 2 through a sliding mechanism 3, and a limiting mechanism for limiting the sliding mechanism 3 is provided between the wrench body 2 and the rotating lever arm 1.

[0024] In this embodiment, the sliding mechanism 3 adopts an arc-shaped block-shaped slider 6, which is connected to the rotating force arm 1. The slider 6 can slide along the side circumference of the wrench body 2 through the cooperation of the slide rail 61 and the slide groove 25, wherein the slide rail 61 is an arc-shaped convex strip arranged on the slider 6, and the slide groove 25 is arranged along the side circumference of the wrench body 2. The slide rail 61 is engaged in the slide groove 25 and can slide along the slide groove 25.

[0025] In this embodiment, the limiting mechanism includes a limiting plate 21, a fixed block 5, a limiting block 4 and a spring 8. The limiting plates 21 are arranged on the edges of the two ends of the wrench body 2 and distributed along its circumference, and the limiting plates 21 at both ends correspond to each other, so that limiting grooves 23 are formed between the adjacent limiting plates 21 at both ends, and an arc groove 24 for the slider 6 to slide therein is formed between the limiting plates 21 at both ends. The rotating lever 1 is composed of a pair of active levers 11 and a fixed lever 12. The two active levers 11 are respectively arranged on the upper surface and the lower surface of the fixed lever 12 along the length direction thereof. One end of each active lever 11 is hinged to the fixed lever 12, and a limiting block 4 is provided at the other end; the fixed block 5 is made integrally with the fixed lever 12. The slider 6 of this embodiment is a pair and is respectively connected to the two sides of the fixed block 5, so that the slider 6 is connected to the rotating lever 1 through the fixed block 5, and the slider 6 can drive the fixed block 5 in the middle to move when sliding. A pair of movable grooves 51 are provided on the fixed block 5, and the two movable grooves 51 correspond to each other up and down. Each limiting block 4 is composed of two parts, one part of each limiting block 4 is adapted to a movable groove 51 and a spring 8 is provided between the part and the movable groove 51, and the other part is connected to the movable arm 11 and adapted to the corresponding limiting groove 23. In this embodiment, the two parts of the limiting block 4 are concentric rectangular blocks, the size of the block adapted to the movable groove 51 is smaller, and the size of the block adapted to the limiting groove 23 is larger. The limiting block 4 in the initial state is engaged in the limiting groove 23 to limit the entire sliding mechanism 3.

[0026] In this embodiment, the slider 6 and the fixed block 5 are rotatably connected via the rotating shaft 7, and the fixed block 5 is rotatable relative to the slider 6, thereby being able to drive the rotating lever arm 1 to change its angle for operation. This enables the entire wrench body to be controlled to rotate at multiple angles, so that the position of the rotating lever arm can be flexibly adjusted.

[0027] The working mechanism and use process of the utility model are as follows: when in use, it is only necessary to engage the engaging hole 22 on the wrench body 2 with the outside of the bolt, and then, the rotating lever arm 1 is controlled to rotate, so that the wrench body 2 can be driven to move along the direction of the thread rotation direction, thereby completing the bolt removal work; when the rotating lever arm 1 is rotated, when its rotation angle reaches a suitable position and cannot be rotated, at this time, there is no need to disassemble the wrench body 2 from the outside of the bolt, and it is only necessary to loosen the limiting mechanism so that it releases the limiting of the sliding mechanism 3, and then control the sliding mechanism 3 to slide inside the arc groove 24, and after sliding to the position on the other side, it is limited again under the action of the limiting mechanism, and then, the rotating lever arm 1 can be controlled to rotate again, thereby the bolt can be rotated and removed again.

[0028] When in use, the staff holds the fixed force arm 12 to drive the sliding mechanism 3 to move. Since the sliding mechanism 3 is limited between the wrench body 2 by the limiting mechanism, the fixed force arm 12 can drive the wrench body 2 to rotate when rotating, thereby driving the bolt engaged in the engaging hole 22 to rotate and disassemble.

[0029] Specifically, when the entire sliding mechanism 3 is in a fixed position and needs to be used, and the installation space cannot control the fixed force arm 12 to rotate in a horizontal position, at this time, it is only necessary to control the fixed block 5 to rotate under the action of the rotating shaft 7, so that it rotates to a suitable angle, and then control the fixed force arm 12 to rotate again, thereby completing the effect of rotating the wrench body 2.

[0030] Specifically, when it is necessary to release the limit of the sliding mechanism 3 by the limit mechanism, it is only necessary to hold the movable arm 11, so that it drives the movable arm 11 arranged above and below to move toward each other under the action of the spring 8, and drives the limit block 4 to move toward each other, so that the outermost side of the limit block 4 is inside the arc groove 24, and then at this time, since the limit block 4 is not inside the limit groove 23, when the fixed arm 12 rotates, it can also drive the entire sliding mechanism 3 to move. After the sliding mechanism 3 moves to a suitable position, release the squeezing of the movable arm 11, so that the spring 8 drives the limit block 4 to reset and engage inside the limit groove 23, so that when the fixed arm 12 rotates, the fixed block 5 will drive the limit block 4 to move, and at this time, the limit block 4 is limited by the limit groove 23, thereby driving the entire wrench body 2 to rotate.

[0031] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wrench with adjustable lever arm, comprising a wrench body and a rotating lever arm, wherein a clamping hole is provided on the wrench body, and characterized in that: The wrench body is in the shape of a short cylinder, the front end of the rotating force arm is slidably mounted on the wrench body along the side circumference thereof through a sliding mechanism, and a limiting mechanism for limiting the sliding mechanism is provided between the wrench body and the rotating force arm.

2. The adjustable lever arm wrench according to claim 1, characterized in that: The sliding mechanism adopts an arc-shaped block-shaped slider, the slider is connected to the rotating force arm, and the slider can slide along the side circumference of the wrench body through the cooperation of the slide rail and the slide groove.

3. The adjustable lever arm wrench according to claim 2, characterized in that: The limiting mechanism includes a limiting plate, a fixed block, a limiting block and a spring. The limiting plate is arranged on the end edge of the wrench body and distributed along its circumference. A limiting groove is formed between two adjacent limiting plates. The rotating lever consists of a movable lever and a fixed lever. The movable lever is arranged on the fixed lever along the length direction of the fixed lever. One end of the movable lever is hinged to the fixed lever, and the other end is provided with a limiting block. The fixed block is connected to the fixed lever. The slider is a pair and is respectively connected to both sides of the fixed block. A movable groove is provided on the fixed block. The limiting block consists of an upper and lower part, one part of which is adapted to the movable groove and a spring is provided between the part and the movable groove, and the other part is connected to the movable lever and adapted to the limiting groove.

4. The adjustable lever arm wrench according to claim 3, characterized in that: The sliding block is rotatably connected to the fixing block so that the fixing block can rotate relative to the sliding block.

5. The adjustable lever arm wrench according to claim 4, characterized in that: The engaging hole on the wrench body is located in the middle position thereof and is a regular polygonal hole, which penetrates the wrench body axially; the limiting plates are located on the two end edges of the wrench body and the limiting plates at the two ends correspond to each other, so that an arc groove for sliding of the slider is formed between the limiting plates at the two ends, and limiting grooves are respectively formed between the adjacent limiting plates at the two ends; the movable force arms are a pair and are respectively located on the upper surface and the lower surface of the fixed force arms; the movable grooves of the fixed blocks are a pair and correspond to each other up and down; the limiting blocks are a pair, each limiting block is arranged on a movable force arm, a part of each limiting block is adapted to a movable groove and a spring is arranged between the part and the movable groove, and the other part is connected to the movable force arm and adapted to the corresponding limiting groove.

6. The adjustable lever arm wrench according to claim 5, characterized in that: The fixed force arm and the fixed block are made in one piece.

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