Gap wrench

Abstract

The utility model discloses a gap wrench, which relates to the technical field of maintenance tools and comprises a wrench main body, a nut sleeve is rotatably mounted at the front end of the wrench main body, a transmission hand wheel is rotatably mounted at the rear end of the wrench main body, the transmission hand wheel is connected with the nut sleeve through a closed-loop transmission belt, and the transmission belt is in a tensioned state. And two ends of the pressing rod respectively press the edge of the nut sleeve and the edge of the transmission hand wheel. The problems that in the prior art, in a narrow space, a nut is difficult to disassemble and assemble, and efficiency is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of overhauling tooling, in particular to a gap wrench. BACKGROUND

[0002] In various devices and machines, overhauling and maintenance work is an indispensable link, and the overhauling and maintenance of devices usually involves the disassembly and installation of screws and nuts.

[0003] In actual operation, the operator often encounters the situation that the space where the screw nut is located is extremely narrow inside the device or at some special position. For this situation, the traditional operation mode is to first loosen the nut as much as possible with a wrench, and then rely on the strength of the fingertips to continue to turn in the narrow space until the nut is completely disassembled or installed in place.

[0004] Therefore, at least the following defects exist in the prior art: In a narrow space, the operator's fingers are difficult to directly stretch in for operation, and the traditional wrench is also difficult to be used flexibly in the narrow space due to the limitation of the volume and shape. This not only increases the operation difficulty, but also greatly reduces the work efficiency. SUMMARY

[0005] The embodiments of the present application provide a gap wrench, which solves the problems of difficult disassembly and installation of nuts in a narrow space and low efficiency.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme, a gap wrench, including wrench main part, the front end of wrench main part rotatory installation has nut sleeve, the rear end of wrench main part rotatory installation has transmission hand wheel, transmission hand wheel and nut sleeve are connected through a closed loop transmission belt, transmission belt is in tension state, and its both ends are respectively tight edge of nut sleeve and edge of transmission hand wheel.

[0007] Since the front and rear ends of the wrench main body are rotatably installed with the nut sleeve and the transmission hand wheel, and the transmission hand wheel and the nut sleeve are connected through the transmission belt, when in use, the wrench main body can be first stretched into the gap, and then the nut sleeve is rotated by rotating the transmission hand wheel, thereby driving the nut to rotate, achieving the disassembly or installation of the nut. The operation difficulty in the narrow space is reduced, and the work efficiency is improved.

[0008] Further, the wrench main body is a strip-shaped plate, the wrench main body is divided into a front part and a rear part along the length direction thereof, and the thickness of the front part is less than that of the rear part. Since the thickness of the front part of the wrench main body is less than that of the rear part, the nut sleeve can be stretched into the narrow space and cooperated with the nut.

[0009] Further, the diameter of the transmission hand wheel is larger than the outer diameter of the nut sleeve; thus, a smaller hand rotation amplitude can realize a larger rotation of the nut sleeve, thereby improving the efficiency of nut dismounting or mounting.

[0010] Further, a hand wheel handle is installed on the transmission hand wheel; the hand wheel handle can be a more comfortable gripping point, so that the operator can more easily exert force.

[0011] Further, a groove extending along the length direction of the wrench main body is arranged at the rear part of the wrench main body, a screw rod is screwed in the groove, and the end of the screw rod away from the nut sleeve is connected with the transmission hand wheel through a sliding block; thus, the tension degree of the transmission belt can be adjusted by rotating the screw rod.

[0012] Further, a rotating shaft is fixed at the center of the transmission hand wheel, and the rotating shaft is rotatably installed on the sliding block.

[0013] Further, the end of the screw rod away from the nut sleeve is a cylindrical adjusting block, and the adjusting block can drive the screw rod to rotate when the adjusting block rotates; thus, the tension degree of the transmission belt can be adjusted by driving the screw rod to rotate through the adjusting block.

[0014] Further, a cylindrical protrusion is arranged at one end of the adjusting block, and a blind hole is arranged at one end of the sliding block, and the protrusion is abutted in the blind hole of the sliding block.

[0015] Further, flanges are arranged at the two ends of the transmission hand wheel in the axial direction, and the two flanges form a wheel groove with the outer circumferential surface of the transmission hand wheel; thus, the upper and lower edges of the transmission belt can be kept in the wheel groove after the transmission belt is tensioned, so as to avoid the transmission belt from falling off.

[0016] Further, a circular hole is arranged at the front end of the wrench main body, and one end of the nut sleeve is clamped and installed in the circular hole.

[0017] Through the above technical solutions, the wrench can at least have the following technical effects or advantages:

[0018] 1. Since the nut sleeve and the transmission hand wheel are rotatably installed at the front and rear ends of the wrench main body respectively, and the transmission hand wheel is connected with the nut sleeve through the transmission belt, when in use, the wrench main body can be first inserted into a gap, and then the nut sleeve is rotated by rotating the transmission hand wheel, so as to drive the nut to rotate, thereby realizing the dismounting or mounting of the nut. The operation difficulty in a narrow space is reduced, and the work efficiency is improved.

[0019] 2. Since the screw rod and the sliding block are installed in the wrench main body, the tension degree of the transmission belt can be adjusted by rotating the screw rod, so as to ensure that the transmission belt maintains stable transmission efficiency between the transmission hand wheel and the nut sleeve, and avoid the transmission failure caused by the loosening or falling off of the transmission belt. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the technical scheme of the utility model clearer, the following will briefly introduce the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings:

[0021] Figure 1 It is the structural schematic diagram of the utility model;

[0022] Figure 2 It is the structural schematic diagram of the utility model in another view;

[0023] Figure 3 It is the structural schematic diagram of the nut sleeve installation place.

[0024] The figure mark explanation: 1, nut sleeve, 2, wrench main body, 3, transmission belt, 4, screw rod, 5, adjusting block, 6, sliding block, 7, transmission hand wheel, 8, hand wheel handle. Specific implementation

[0025] In order to make the technical scheme of the utility model clearer, the following will briefly introduce the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings:

[0026] The utility model discloses a gap wrench, it includes wrench main body 2, respectively installs the nut sleeve 1 and transmission hand wheel 7 in the both ends of wrench main body 2, the transmission belt 3 of connecting the nut sleeve 1 with transmission hand wheel 7. Wherein, transmission belt 3 is closed loop, and the edge of nut sleeve 1 and the edge of transmission hand wheel are pressed tightly respectively in the both ends of transmission belt 3, when transmission hand wheel 7 rotates, can drive nut sleeve 1 to rotate through transmission belt 3. In an example, the maintenance personnel can hold wrench main body 2, and its front end (i.e. the one end of installing nut sleeve 1) is stretched into the gap, makes nut sleeve 1 sleeve in the outside of nut, then drives transmission hand wheel 7 to rotate, makes it through transmission belt 3 drive nut sleeve 1 to rotate.

[0027] The front end of wrench main body 2 is equipped with round hole, and one end of nut sleeve 1 is clamped and installed in the round hole.

[0028] Specifically, one end of nut sleeve 1 is externally clamped with snap spring after passing through the round hole of the front end of wrench main body 2. Figure 3), thereby being able to maintain the rotation of the nut sleeve 1 relative to the wrench body 2, and when the size of the nut is different, the nut sleeve 1 can be removed from the wrench body 2 and then replaced. Figure 1 As shown, the wrench body 2 is a strip-shaped plate. Along its length, the wrench body 2 can be divided into a front portion and a rear portion. The portion of the wrench body 2 near the nut sleeve 1 is the front portion, while the portion of the wrench body 2 near the transmission handwheel 7 is the rear portion. The front portion is thinner than the rear portion. This allows the operator to more easily insert the front portion of the wrench body 2 into the gap during use.

[0029] like Figure 2 As shown, the rear portion of the wrench body 2 is provided with a slot extending along its length. A screw rod 4 is mounted within the slot. One end of the slot is provided with a threaded hole that engages with the screw rod 4, allowing rotation of the screw rod 4 to cause it to move forward and backward relative to the wrench body 2. The end of the screw rod 4, away from the threaded hole, is provided with a cylindrical adjustment block 5. Rotating the adjustment block 5 causes the screw rod 4 to rotate. One end of the adjustment block 5 also abuts a slider 6. A rotating shaft is fixed to the center of a transmission handwheel 7, which is rotatably mounted on the slider 6. It should be understood that rotation of the adjustment block 5 or the screw rod 4 only causes the slider 6 to move forward and backward within the slot of the wrench body 2 and does not cause the slider 6 to rotate. For example, one end of the adjustment block 5 can be provided with a cylindrical protrusion, and one end of the corresponding slider 6 can be provided with a blind hole. The protrusion abuts against the blind hole of the slider 6. The slider is slidably mounted within the slot along the length of the wrench body. Thus, by manipulating the screw rod 4 to rotate, the transmission belt 3 can be kept in a tensioned state, ensuring the synchronous rotation of the nut sleeve 1 and the transmission handwheel.

[0030] like Figures 1 to 2 As shown, the diameter of the transmission handwheel 7 is larger than that of the nut sleeve 1. Operating the transmission handwheel 7 allows the nut sleeve 1 to rotate more quickly, improving nut removal efficiency. Furthermore, a handwheel crank 8 is mounted on the transmission handwheel 7, which can be rotated by turning the handwheel crank 8. Furthermore, flanges are provided on the outer periphery of the transmission handwheel 7 at both axial ends. These flanges form grooves with the outer periphery of the transmission handwheel 7. This ensures that the upper and lower edges of the transmission belt 3 remain within the grooves when tensioned, preventing the transmission belt 3 from falling off.

[0031] When using this utility model:

[0032] First, operate the adjusting block 5 to rotate and keep the transmission belt 3 in a tensioned state, then extend the front part of the wrench body 2 into the gap so that the nut sleeve 1 at the front end is sleeved on the outside of the nut, and turn the handwheel crank handle 8 to rotate the nut sleeve 1, thereby driving the nut that cooperates with it to rotate. The operation is convenient and the work efficiency is improved.

[0033] In the description of the utility model, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the utility model and not for the purpose of requiring the utility model to be necessarily constructed or operated in a particular orientation, and therefore should not be construed as limiting the utility model. In the utility model, "connected" and "connected" should be understood broadly, for example, it can be connected, and can also be detachably connected; it can be directly connected, and can also be indirectly connected through an intermediate component. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A gap spanner comprising a spanner body (2), characterised in that, The front end of the wrench body (2) is rotatably installed with a nut sleeve (1), and the rear end of the wrench body (2) is rotatably installed with a transmission hand wheel (7), the transmission hand wheel (7) and the nut sleeve (1) are connected through a closed-loop transmission belt (3), the transmission belt (3) is in a tension state, and the edges of the nut sleeve (1) and the transmission hand wheel (7) are pressed at both ends of the transmission belt (3); The wrench body (2) is a strip-shaped plate, the wrench body (2) is divided into a front part and a rear part along the length direction thereof, and the thickness of the front part is smaller than that of the rear part; The rear part of the wrench body (2) is provided with a groove extending along the length direction thereof, and a lead screw (4) is threadedly installed in the groove, and the end of the lead screw (4) away from the nut sleeve (1) is connected with the transmission hand wheel (7) through a sliding block (6).

2. A gap wrench according to claim 1, wherein The diameter of the transmission hand wheel (7) is greater than the outer diameter of the nut sleeve (1).

3. A gap wrench according to claim 2, wherein The transmission hand wheel (7) is installed with a hand wheel handle (8).

4. A gap wrench according to claim 1, wherein The center of the transmission hand wheel (7) is fixed with a rotating shaft, and the rotating shaft is rotatably installed on the sliding block (6).

5. A gap wrench according to claim 4, wherein The end of the lead screw (4) away from the nut sleeve (1) is a cylindrical adjusting block (5), and the adjusting block (5) can drive the lead screw (4) to rotate when the adjusting block (5) rotates.

6. A gap wrench according to claim 5, wherein One end of the adjusting block (5) is provided with a cylindrical protrusion, and the other end of the sliding block (6) is provided with a blind hole, and the protrusion is abutted in the blind hole of the sliding block (6).

7. A gap wrench according to claim 1, wherein The outer periphery of the two ends of the transmission hand wheel (7) in the axial direction is provided with a flange, and the two flanges form a wheel groove with the outer peripheral surface of the transmission hand wheel (7).

8. A gap wrench according to claim 1, wherein The front end of the wrench body (2) is provided with a round hole, and one end of the nut sleeve (1) is clamped and installed in the round hole.

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