Adjustable wrench

Abstract

The utility model relates to an adjustable spanner which comprises a strip-shaped handle and a spanner head installed at one end of the strip-shaped handle, the spanner head comprises a spanner head body and paired clamping plates arranged on the spanner head body, an adjusting device used for adjusting the distance between the paired clamping plates is installed on the spanner head, and a transmission rod is installed on the strip-shaped handle. The transmission rod extends along the strip-shaped handle, one end of the transmission rod is in transmission connection with the adjusting device, and the other end of the transmission rod extends out of the strip-shaped handle. According to the adjustable wrench, the rotary knob is rotated to drive the transmission rod to rotate, the adjusting device is promoted to adjust the size of the opening of the wrench head, the requirement that the size of the opening of the wrench needs to be repeatedly adjusted when valves of different models are operated at high positions or other places which are not easy to approach is met, the working efficiency is improved, and the safety of personnel is guaranteed to a certain degree.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wrench tool technical field especially, relates to an adjustable wrench. BACKGROUND

[0002] There are very many pipelines and valves in the petroleum chemical industry, metallurgical field, which are automatic and manual. Since the valve on the pipeline is a large valve, it is very inconvenient for workers to use and close. The commonly used valve wrench on the market is to fix the hand wheel and then make action to open or close the valve. It needs to take down the wrench and fix it on the hand wheel again to make action every time an angle is turned, which greatly reduces the work efficiency and increases the working time. In order to improve the work efficiency, the commonly used tightening tool is a ratchet wrench. For example, the Chinese utility model patent application for a locking and positioning ratchet wrench with the authorization announcement number CN222134822U, which comprises a wrench head main body, the wrench head main body is rotationally connected with a ratchet wheel, and six equidistantly arranged threaded rods are rotationally inserted into the inside of the wrench head main body. The outer circumferential surface of each threaded rod is threadedly connected with a threaded tube. The locking and positioning ratchet wrench can adjust the ratchet wrench according to the model of the hexagonal screw, which facilitates the positioning and disassembly of different models of hexagonal screws. This adjustable ratchet wrench needs to rotate the knob at the top of the wrench head, the knob drives the driving gear, the driving gear drives the driven gear to make the threaded rod rotate, the threaded tube drives the connecting plate and the clamping plate to move in and out, and then the different models of hexagonal screws are locked and positioned.

[0003] However, in the production operation site of many industries such as petroleum chemical industry, many kinds of wrenches are used to operate various valve control switches. The valve control switch is installed in a high place or other place not easy to access, the operator will climb a ladder or adopt an unsafe position to operate the valve, and the operator needs to adjust the wrench opening size repeatedly at a high place when working. When facing different models of screws, the ratchet wrench needs to adjust the knob at the top of the wrench head to change the size of the wrench opening, which affects the work efficiency and causes certain personnel danger. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an adjustable wrench to solve the problem that the operator needs to adjust the knob at the top of the wrench head to change the size of the wrench opening at a high place when working at a high place or other place not easy to access, which affects the work efficiency and causes certain personnel danger.

[0005] To achieve the above object, the utility model discloses a kind of adjustable wrench technical solutions: a kind of adjustable wrench, including strip handle and the wrench head of installation in the one end of strip handle, the wrench head includes the wrench head main body and the pair of clamping plate of setting on the wrench head main body, adjusting device is installed on the wrench head for adjusting the pair of clamping plate distance, transmission rod is installed on strip handle, transmission rod extends along strip handle and one end is drivingly connected with adjusting device, the other end extends strip handle, transmission rod is rotatably installed on strip handle around its own axis.

[0006] Further, the adjusting device includes an adjusting screw threadedly engaged with at least one clamping plate, the adjusting screw and the clamping plate threadedly engaged therewith constitute a screw nut pair, and the adjusting device further includes a reversing transmission structure, the reversing transmission structure includes a driven rod perpendicularly arranged with the adjusting screw and the transmission rod, the driven rod is rotatably installed in the wrench head around its own axis, and the two ends thereof are drivingly connected with the adjusting screw and the transmission rod through bevel gear sets respectively.

[0007] Further, one of the transmission rod and the strip handle is provided with an elastic pin, and the other is provided with a clamping groove matched with the elastic pin, when the elastic pin and the clamping groove are in the matched state, the bevel gear set between the transmission rod and the driven rod is separated.

[0008] Further, a spring is arranged between the strip handle and the transmission rod for providing an axial elastic force to the transmission rod, so as to ensure that the bevel gear set between the transmission rod and the driven rod is engaged.

[0009] Further, the strip handle is provided with a mounting long hole penetrating along the length direction thereof, the transmission rod is rotatably sleeved in the mounting long hole, and the spring is sleeved on the transmission rod and mounted in the strip handle.

[0010] Further, among the pair of clamping plates, one is a fixed clamping plate, and the other is a movable clamping plate, the adjusting screw is rotatably assembled with the fixed clamping plate and axially fixed relative to the fixed clamping plate, and threadedly engaged with the movable clamping plate, and the movable clamping plate is movably mounted on the wrench head main body.

[0011] Further, the end of the strip handle is rotatably provided with a ratchet wheel, the end of the strip handle is further provided with an adjusting button for adjusting the forward and reverse rotation of the ratchet wheel, the ratchet wheel is a hollow structure, and the wrench head is inserted into the ratchet wheel.

[0012] Further, the clamping groove is an annular groove.

[0013] Further, the end of the transmission rod away from the wrench head is fixedly provided with a knob.

[0014] The utility model provides a kind of adjustable wrench, by increasing the transmission rod connected in adjusting device, compared with original adjustable wrench, the adjustable wrench of the utility model can be directly adjusted the size of board mouth by rotating transmission rod, transmission rod transmission makes adjusting device synchronous operation, realize that long handle is far from the size of the end of handle directly adjusted by board mouth, when operating personnel high operation or other not easily accessible position operation, the size of the size of the handle of more convenient adjustment is improved operating efficiency and personnel safety is guaranteed to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic diagram of the adjustable wrench of the utility model;

[0016] Figure 2 It is Figure 1 the enlarged view of A in middle;

[0017] Figure 3 It is Figure 1 the enlarged view of B in middle;

[0018] Figure 4 It is the handle part assembly drawing of the adjustable wrench of the utility model;

[0019] Figure 5 It is the handle part explosion drawing of the adjustable wrench of the utility model;

[0020] Figure 6 It is the plan view of the handle of the adjustable wrench of the utility model;

[0021] Figure 7 It is the handle part front view of the adjustable wrench of the utility model;

[0022] Figure 8 It is Figure 7 sectional view of C-C in middle;

[0023] Figure 9 It is the structure schematic diagram of the movable clamping plate of the adjustable wrench of the utility model.

[0024] In the drawing: 1, strip handle;11, transmission rod;112, elastic pin;113, clamping groove;114, spring;115, knob;12, mounting hole;13, ratchet wheel;14, adjusting button;2, handle;21, handle main body;211, fixed plate;212, fixed mounting hole;213, threaded hole;22, clamping plate;221, fixed clamping plate;222, movable clamping plate;223, bearing;3, adjusting device;31, reversing transmission structure;311, first bevel gear;312, second bevel gear;313, third bevel gear;314, fourth bevel gear;32, adjusting lead screw;33, driven rod. DETAILED DESCRIPTION

[0025] The features and performances of the utility model are further described in detail in combination with the embodiments below.

[0026] The utility model discloses an adjustable wrench mainly aims at the operation personnel when operating in the high place or other not easy to access place, and the operation personnel will borrow the ladder or adopt the unsafe station to operate the valve, need repeatedly adjust the wrench opening size, and the existing adjustable wrench needs to rely on the top knob to change the wrench opening size, influences the operation efficiency and causes certain personnel dangerous problem. The utility model discloses an adjustable wrench's strip -shaped handle inside is equipped with the transmission rod that can rotate along the strip -shaped handle axial, and the transmission rod transmission connection adjustable device that can adjust the distance of the pair of clamping plates, when needing to adjust the size of the wrench head opening, through rotating the transmission rod, and the transmission rod drives the adjustable device to change the distance between the pair of clamping plates to adjust the size of the wrench opening.

[0027] Based on the above main idea, different embodiments are provided below for illustration.

[0028] In embodiment 1, as Figure 1 The adjustable wrench includes strip -shaped handle 1 and the wrench head 2 of installing in strip -shaped handle 1 one end, as Figure 7 The wrench head 2 includes the wrench head main part 21 of cylindrical and the pair of clamping plates 22 of setting on the wrench head main part 21, and the adjustable device 3 for adjusting the distance of the pair of clamping plates 22 is installed on the wrench head 2, and the clamping plate 22 is used to clamp the valve that needs to be adjusted. The transmission rod 11 is installed on the strip -shaped handle 1, and the transmission rod 11 extends along the strip -shaped handle 1 and one end is transmission connection with the adjustable device 3, and the other end extends out of the strip -shaped handle 1, and the transmission rod 11 is rotationally installed on the strip -shaped handle 1 around its own axis. When operating, the clamping plate 22 is sleeved on the valve that needs to be adjusted, and by rotating the transmission rod 11, the transmission rod 11 drives the adjustable device 3 to make the clamping plate 22 clamp the valve, at this moment, the dismounting operation can be carried out.

[0029] On the basis of the above embodiment, in an embodiment, the transmission rod 11 is transmission connection with the adjustable device 3 through worm and gear transmission, and the worm structure is fixedly installed on the end of the transmission rod 11 towards the wrench head 2, and the adjustable device 3 includes at least one adjusting screw 32 screwing with the clamping plate 22, and the adjusting screw 32 and the clamping plate 22 screwing with it constitute the screw nut pair. The adjustable device 3 also includes reversing transmission structure 31, and the reversing transmission structure 31 includes driven rod 33 vertically arranged with the adjusting screw 32 and the transmission rod 11, and the driven rod 33 is rotationally installed in the wrench head around its own axis, and the driven rod 33 is matched with the worm structure of the transmission rod 11 through the turbine installed on the driven rod 33, and the driven rod 33 and the adjusting screw 32 are transmission connection through a pair of bevel gears.

[0030] In a preferred embodiment, in order to make the structure of the wrench simpler, the cost is lower, as Figure 2 andFigure 4 The adjusting device 3 comprises an adjusting screw 32 screwing with the at least one clamping plate 22, the adjusting screw 32 and the clamping plate 22 screwing with the adjusting screw 32 constitute a screw-nut pair, and the adjusting device 3 further comprises a reversing transmission structure 31. As shown in Figure 5 The reversing transmission structure 31 comprises a driven rod 33 vertically arranged with the adjusting screw 32 and the transmission rod 11, the driven rod 33 is rotatably mounted in the handle 2 around its own axis, and the two ends of the driven rod 33 are respectively connected with the adjusting screw 32 and the transmission rod 11 through a bevel gear set. The end of the transmission rod 11 towards the handle 2 is provided with a first bevel gear 311, the end of the driven rod 33 towards the transmission rod 11 is provided with a second bevel gear 312, the bevel gear set connecting the driven rod 33 and the transmission rod 11 is composed of the first bevel gear 311 and the second bevel gear 312, the end of the driven rod 33 towards the adjusting screw 32 is fixedly provided with a third bevel gear 313, and the adjusting screw 32 is fixedly provided with a fourth bevel gear 314, the bevel gear set connecting the driven rod 33 and the adjusting screw 32 is composed of the third bevel gear 313 and the fourth bevel gear 314.

[0031] On the basis of the above-mentioned embodiments, in one embodiment, the transmission rod 11 can only rotate along its own axis inside the strip-shaped handle 1 and cannot move along the axis. In a preferred embodiment, in order to prevent the displacement of the clamping plate 22 due to the accidental touch of the transmission rod 11 when the wrench is working, which has adjusted the distance of the clamping plate 22 and leads to the reduction of working efficiency. As shown in Figure 3 The transmission rod 11 can rotate along its own axis and move along the axis inside the strip-shaped handle 1, the transmission rod 11 and the strip-shaped handle 1 are respectively provided with an elastic pin 112 with a circular arc top and a clamping groove 113 matched with the elastic pin 112, when the elastic pin 112 and the clamping groove 113 are in the matched state, the first bevel gear 311 and the second bevel gear 312 of the bevel gear set between the transmission rod 11 and the driven rod 33 are separated.

[0032] In different embodiments, when the teeth of the first bevel gear 311 are fixedly assembled on the end of the transmission rod 11 towards the direction away from the bar handle 1, the clamping groove 113 is farther away from the handle 2 than the elastic pin 112, when the clamping groove 113 cooperates with the elastic pin 112, the transmission rod 11 is pushed to make the elastic pin 112 disengage from the clamping groove 113, the transmission rod 11 moves along its own axis in the installation long hole 12 towards the handle 2, when reaching the limit position, the first bevel gear 311 meshes with the second bevel gear 312. When the teeth of the first bevel gear 311 are fixedly assembled on the end of the transmission rod 11 towards the direction of the bar handle 1, the clamping groove 113 is closer to the handle 2 than the elastic pin 112, when the clamping groove 113 cooperates with the elastic pin 112, the transmission rod 11 is pulled to make the elastic pin 112 disengage from the clamping groove 113, the first bevel gear 311 moves with the transmission rod 11 towards the handle 2, when reaching the limit position, the first bevel gear 311 meshes with the second bevel gear 312.

[0033] In the above-mentioned embodiments, when the size of the handle opening needs to be adjusted, the operator needs to push or pull the transmission rod 11 to make the elastic pin 112 disengage from the clamping groove 113, and also needs to continuously apply force to make the first bevel gear 311 mesh with the second bevel gear 312. In a preferred embodiment, in order to make the work of the operator more convenient, such as Figure 3 , a spring 114 is arranged between the bar handle 1 and the transmission rod 11 to provide the transmission rod 11 with an axial elastic force, to ensure that the first bevel gear 311 and the second bevel gear 312 of the bevel gear set between the transmission rod 11 and the driven rod 33 are meshed, the bar handle 1 is provided with an installation long hole 12 extending along its length direction, the transmission rod 11 is rotatably arranged in the installation long hole 12, the spring 114 is sleeved on the transmission rod 11 and is installed in the bar handle 1, when the distance between the pair of clamping plates 22 needs to be changed, only the elastic pin 112 needs to be disengaged from the clamping groove 113, the spring 114 will make the first bevel gear 311 mesh with the second bevel gear 312.

[0034] On the basis of the above-mentioned embodiments, in an embodiment, the pair of clamping plates 22 on the handle 2 is composed of at least one pair of movable clamping plates 222, a double-headed screw with opposite threads is sleeved in the threaded hole 213 of the pair of movable clamping plates 222, the double-headed screw is installed on the handle main body 21 through a bearing 223, a fixed plate 211 is fixedly installed inside the handle main body 21, the movable clamping plate 222 is sleeved on the fixed plate 211 through a fixed installation hole 212, the double-headed screw and the fixed plate 211 jointly define that the pair of movable clamping plates 222 can only move away from or close to each other. When the adjusting device 3 works, the rotation of the double-headed screw makes the movable clamping plates 222 relatively close to or move away from each other to achieve the purpose of clamping the valve. In a preferred embodiment, in order to make the clamping plate 22 more stable when being installed and disassembled, such as Figure 4 , among the pair of clamping plates 22, one is a fixed clamping plate 221 and the other is a movable clamping plate 222, such as Figure 5The inner part of the fixed clamping plate 221 is fixedly installed with a bearing 223, as shown in Figure 5 The end of the adjusting screw 32 is fixedly installed on the inner ring of the bearing 223 of the fixed clamping plate 221, so that the adjusting screw 32 is rotatably assembled with the fixed clamping plate 221 and axially fixed, as shown in Figure 7 and Figure 9 The adjusting screw 32 is matched with the movable clamping plate 222 through the threaded hole 213, as shown in Figure 8 A fixed plate 211 is fixedly installed in the inner part of the wrench body 21, and the fixed plate 211 is perpendicular to the driven rod 33, and the fixed plate 211 is provided with a through hole for accommodating the rotation of the driven rod 33, as shown in Figure 7 and Figure 9 The movable clamping plate 222 is sleeved on the fixed plate 211 through the fixed installation hole 212, and the adjusting screw 32 and the fixed plate 211 jointly limit the movable clamping plate 222 to only move away from or close to the fixed clamping plate 221.

[0035] On the basis of the above-mentioned embodiments, in one embodiment, the wrench body 21 is fixedly installed at the front end of the strip-shaped handle 1, and when the wrench is used to assemble or disassemble the valve, after rotating by a certain angle, the wrench needs to be removed in order to work more conveniently or because the working space is insufficient, and the clamping plate 22 needs to be re-fixed at the initial angle to clamp the valve. In a preferred embodiment, in order to enable the operator to work smoothly without removing the wrench, and to improve the working efficiency, as shown in Figure 5 and Figure 6 The end of the strip-shaped handle 1 is rotatably installed with a ratchet wheel 13, and the end of the strip-shaped handle 1 is also installed with an adjusting button 14 for adjusting the forward and reverse rotation of the ratchet wheel 13, and the ratchet wheel 13 is a hollow structure, and the wrench 2 is rotatably inserted into the ratchet wheel 13. Specifically, the ratchet wheel and the adjusting button are both prior art, and will not be described herein.

[0036] In a preferred embodiment, in order to improve the working efficiency, as shown in Figure 3 The clamping groove 113 is arranged as a ring groove, so that the elastic pin 112 is more easily matched with the clamping groove 113, and the end of the transmission rod 11 away from the wrench 2 is fixedly installed with a knob 115, so as to increase the friction between the hand and the transmission rod 11 and save manpower.

[0037] The adjustable wrench of the utility model needs to first adjust the adjusting button for adjusting the forward and reverse rotation of the ratchet wheel, confirm the rotation direction of the ratchet wheel, then rotate the knob away from the wrench of the strip-shaped handle, the rotation of the knob drives the rotation of the transmission rod, the transmission rod drives the rotation of the driven rod through the reversing transmission structure, the driven rod drives the rotation of the screw nut pair through the reversing transmission structure, so as to change the distance between the movable clamping plate and the fixed clamping plate to adjust the size of the wrench opening, when adjusted to the required position, pull the knob away from the wrench, so that the elastic pin is matched with the clamping groove, to prevent the size of the wrench opening from being changed by mistake during work, at this time, the wrench opening is locked, and the wrench can be operated to assemble or disassemble the valve.

[0038] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. The patent protection scope of the present application is defined by the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. An adjustable wrench comprising a bar-shaped handle and a wrench head mounted at one end of the bar-shaped handle, the wrench head comprising a wrench head body and a pair of jaws provided on the wrench head body, and the wrench head is provided with an adjusting device for adjusting the distance between the pair of jaws, characterized in that, The transmission rod is installed on the strip-shaped handle, extends along the strip-shaped handle, and is in transmission connection with the adjusting device at one end and extends out of the strip-shaped handle at the other end.

2. The adjustable wrench of claim 1, wherein, The adjusting device comprises an adjusting screw threadedly matched with the at least one clamping plate, the adjusting screw and the clamping plate threadedly matched therewith constitute a screw nut pair, and the adjusting device further comprises a reversing transmission structure, the reversing transmission structure comprises a driven rod perpendicularly arranged with the adjusting screw and the transmission rod, the driven rod is rotatably installed in the handle, and the two ends thereof are in transmission connection with the adjusting screw and the transmission rod through bevel gear sets.

3. The adjustable wrench of claim 2, wherein, One of the transmission rod and the strip-shaped handle is provided with an elastic pin, and the other is provided with a clamping groove matched with the elastic pin, when the elastic pin and the clamping groove are in the matched state, the bevel gear set between the transmission rod and the driven rod is separated.

4. An adjustable spanner according to claim 2 or 3, wherein, A spring is arranged between the strip-shaped handle and the transmission rod to provide an axial elastic force to the transmission rod, so as to ensure that the bevel gear set between the transmission rod and the driven rod is engaged.

5. The adjustable wrench of claim 4, wherein, The strip-shaped handle is provided with a mounting long hole penetrating along the length direction thereof, the transmission rod is rotatably arranged in the mounting long hole, and the spring is sleeved on the transmission rod and mounted in the strip-shaped handle.

6. The adjustable wrench of claim 2 or 3, wherein, Among the pair of clamping plates, one is a fixed clamping plate, and the other is a movable clamping plate, the adjusting screw is rotatably assembled with the fixed clamping plate and axially fixed relative to the fixed clamping plate, and is threadedly matched with the movable clamping plate, and the movable clamping plate is movably mounted on the handle main body.

7. The adjustable wrench of any one of claims 1-3, wherein, The end of the strip-shaped handle is rotatably mounted with a ratchet wheel, and the end of the strip-shaped handle is further mounted with an adjusting button for adjusting the forward and reverse rotation of the ratchet wheel, the ratchet wheel is a hollow structure, and the handle stopper is inserted in the ratchet wheel.

8. The adjustable wrench of claim 3, wherein, The clamping groove is an annular groove.

9. The adjustable wrench of any one of claims 1-3, wherein, The end of the transmission rod away from the handle is fixedly mounted with a knob.

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