CN216707321U - Screwing tool - Google Patents

Abstract

The utility model provides a screwing tool. The screwing tool comprises a handle, an enclosing chain and a connection and fixing structure. The handle is provided with an abutting end for abutting the workpiece to be screwed. The first end of the chain is fixed on the first side of the handle, the second end of the surrounding chain is movable in a direction perpendicular to the axis of rotation, around the workpiece to be screwed, and reaches the second side of the handle opposite the first side, The connection and fixing structure is used to tighten any rotating unit that reaches the second side and then fixedly connect it to the second side, so that the rotating unit on the periphery of the workpiece to be screwed and the contact end enclose a non-circular shape that can clamp the workpiece to be screwed. The clamping hole provided by the utility model can solve the problem that the existing tools cannot flexibly adapt to bolts of different specifications.

Description

screwing tool

technical field

The utility model belongs to the technical field of hardware tools, in particular to a screwing device.

Background technique

Large steel structures often include a large number of connecting bolts, and the number, specifications and types of bolts are many. Existing bolt screwing tools, such as socket wrenches or adjustable wrenches, need to be replaced with sockets of different sizes when faced with different bolts, and the open size of the adjustable wrench needs to be adjusted. Frequent replacement and adjustment operations not only consume workers' physical strength, but also consume their spirits, aggravate their emotions, and lead to low work efficiency and poor quality.

Utility model content

The embodiment of the present invention provides a screwing tool, which aims to solve the problem that the existing tool cannot flexibly adapt to bolts of different specifications.

In order to achieve the above-mentioned purpose, the technical scheme adopted by the present utility model is to provide a screwing tool, comprising:

The handle is provided with an abutting end for abutting the screwed workpiece;

The surrounding chain includes a plurality of rotating units connected in sequence, two ends of the rotating units are respectively connected in rotation with the ends of the adjacent rotating units, and the rotation axes are parallel to each other, and the first end of the surrounding chain is fixed on the The first side of the handle, the second end of the enclosing chain is movable in a direction perpendicular to the axis of rotation, around the workpiece to be screwed, and onto the handle opposite the first side the second side; and

The connection and fixing structure is used for tightening any of the rotating units reaching the second side and then fixedly connecting them with the second side, so that the rotating units on the periphery of the screwed workpiece and the conflicting end A non-circular clamping hole that can clamp the workpiece to be screwed is formed. At this time, the rotating unit located on the periphery of the workpiece to be screwed surrounds and abuts the outer wall of the workpiece to be screwed, and is in contact with the workpiece. The abutting end remains relatively fixed, and the shape of the non-circular clamping hole remains unchanged.

In a possible implementation manner, the handle is a rod-shaped structure, the head end of the handle is the contact end, the surface orientation of the contact end is consistent with the extension direction of the handle, and the length of the handle is greater than 70mm and less than 300mm, the distance between the first end and the head end is less than 25mm.

In a possible implementation manner, the second side is a plane structure, and the rotating unit can abut against the second side.

In a possible implementation manner, a holding block protruding away from the second side is fixed on the first side, and the holding block is provided with a groove for inserting the tiger's mouth of a human hand. After being put into the groove, the bending of the fingers can make the rotating unit within the coverage area of the human hand abut against the second side.

In a possible implementation manner, the distance between the bottom end of the groove and the second side is greater than 30 mm and less than 70 mm.

In a possible implementation, the connection and fixing structure includes:

a first positioning hole, opened on the surface of the second side and extending inside the handle, the number of the first positioning holes is multiple and evenly distributed along the extension direction of the handle; and

The first insertion rod is fixed at the second end, and the first insertion rod is used for inserting into the first positioning hole after the surrounding chain is stretched, so as to keep the surrounding chain in a taut state, and the rotating The unit maintains its current position and attitude.

In a possible implementation manner, the rotating unit is a rod-shaped structure with a rectangular cross section, and the length of the rotating unit is less than 50 mm.

In a possible implementation, the connection and fixing structure includes:

a second insertion rod, fixed on the second side and extending out of the second side; and

The second positioning holes are arranged on the surrounding chain. The number of the second positioning holes is multiple and evenly distributed along the extending direction of the surrounding chain. The second positioning holes are used for tightening the surrounding chain. The second insertion rod is then sleeved, so that the second insertion rod clamps the surrounding chain, so that the surrounding chain is kept in a taut state, and the rotating unit maintains the current position and posture.

In a possible implementation manner, the surrounding chain is a roller chain, and the pitch is less than or equal to 8 mm.

In a possible implementation manner, the handle is a linear structure, a screw parallel to itself is pierced inside the handle, the screw is connected to the handle by a thread, and the head of the screw can collide with the handle The end protrudes, and the screwed workpiece is pressed tightly.

Compared with the prior art, the screwing tool provided by the utility model has the beneficial effect that a non-circular clamping hole is formed by surrounding the chain and the conflicting end. Screw the workpiece, and the screwed workpiece can be rotated with the handle to realize the disassembly and assembly of the screwed workpiece; before use, the second end is in a free state. Move the second end to the second side of the handle, and tighten the second end, so that the surrounding chain hoops the workpiece to be screwed. At this time, a non-circular hole is formed, and any The rotating unit is fixed on the handle, the rotating unit from the rotating unit to the first end can be maintained in the current state, and the shape of the non-circular clamping hole is maintained together with the conflicting end. When the outer wall is clamped and the handle is rotated, the rotational torque can be applied to the workpiece to be screwed; when the size of the workpiece to be screwed changes, the operation steps remain unchanged, but the length of the surrounding chain used to surround the workpiece to be screwed occurs. It can adapt to different specifications of screwed workpieces within a certain range without replacing or adjusting any components, thereby improving work efficiency and quality.

Description of drawings

1 is a schematic diagram of a use state of a screwing tool provided by an embodiment of the present invention;

Fig. 2 is the enlarged view of A place in Fig. 1;

3 is a schematic diagram of the use state of the screwing tool provided by the embodiment of the present utility model, compared with FIG. 1 , the size of the screwed workpiece in this figure is smaller;

Fig. 4 is the enlarged view of the place B in Fig. 3;

Fig. 5 is the sectional view at C-C place in Fig. 3;

FIG. 6 is a schematic diagram of the use state of the screwing tool provided by the embodiment of the present invention. Compared with FIG. 1 , the connection and fixing structure and the structure of the rotating unit are different;

Fig. 7 is the view in the direction of D in Fig. 6;

FIG. 8 is a schematic diagram of the use state of the screwing tool provided by the embodiment of the present invention. Compared with FIG. 6 , the handle is provided with a screw rod.

Description of reference numbers:

1. Handle; 11. First side; 12. Second side; 13. Interfering end; 14. Holding block; 141. Groove; 2. Surrounding chain; 21. First end; 22, Second end; 23 , rotating unit; 3, connecting and fixing structure; 31, the first positioning hole; 32, the first insertion rod; 33, the second insertion rod; 34, the second positioning hole; 4, the screwed workpiece; 41, non-circular Card hole; 5. Screw; 51. Handle.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

Please refer to FIG. 1 to FIG. 4 together, and now the screwing tool provided by the present invention will be described. The screwing tool includes a handle 1 , a surrounding chain 2 and a connecting and fixing structure 3 . The handle 1 is provided with an abutting end 13 for abutting the workpiece 4 to be screwed, and the surrounding chain 2 includes a plurality of rotating units 23 connected in sequence. And the rotation axes are parallel to each other, the first end 21 of the surrounding chain 2 is fixed on the first side 11 of the handle 1, and the second end 22 of the surrounding chain 2 can move in the direction perpendicular to the above-mentioned rotation axis, bypassing the workpiece 4 to be screwed. , and reach the second side 12 opposite to the first side 11 on the handle 1; the connecting and fixing structure 3 is used to tighten any rotating unit 23 reaching the second side 12 and then fixedly connect it with the second side 12, so that the rotated unit 23 can be connected to the second side 12. The rotating unit 23 on the periphery of the screwed workpiece 4 and the contact end 13 enclose a non-circular clamping hole 41 that can clamp the screwed workpiece 4. At this time, the rotating unit 23 located on the periphery of the screwed workpiece 4 is surrounded by and is screwed tightly. The outer wall of the workpiece 4 is relatively fixed with the interference end 13 , and the shape of the non-circular clamping hole 41 remains unchanged.

Compared with the prior art, the screwing tool provided in this embodiment has the beneficial effect that a non-circular clamping hole 41 is formed by surrounding the chain 2 and the interference end 13, and the non-circular clamping hole 41 is sleeved on the workpiece 4 to be screwed. The screwed workpiece 4 is stuck, and the screwed workpiece 4 can be rotated with the handle 1 to realize the disassembly and assembly of the screwed workpiece 4; before use, the second end 22 is in a free state. 13 Press against the outer wall of the workpiece 4 to be screwed, then move the second end 22 to the second side 12 of the handle 1, and pull the second end 22, so that the surrounding chain 2 is fastened to the workpiece 4 to be screwed. A circular card hole 41 is formed, and any rotating unit 23 at the second side 12 is fixed on the handle 1 by the connecting and fixing structure 3, and the rotating unit 23 from the rotating unit 23 to the first end 21 can be maintained in the current state, Together with the contact end 13, the shape of the non-circular clamping hole 41 is maintained, and the inner wall of the non-circular clamping hole 41 is clamped with the outer wall of the workpiece 4 to be screwed. By rotating the handle 1, the rotational torque can be applied to the workpiece 4 to be screwed. When the size of the workpiece 4 to be screwed changes, the operation steps remain unchanged, but the length of the surrounding chain 2 used to surround the workpiece 4 to be screwed changes, and it can be adapted to a certain range without replacing or adjusting any components. Workpieces 4 of different specifications are screwed, thereby improving work efficiency and quality.

It should be noted that, in this embodiment, the outer wall of the screwed workpiece 4 cannot be circular, otherwise it cannot be clamped with the non-circular clamping hole 41 . The screwed workpiece 4 shown in FIGS. 1 and 3 is the head of the bolt, and since it is a plan view, the screw portion cannot be seen. In the state shown in FIGS. 1 and 3 , the workpiece 4 to be screwed can be rotated by rotating the handle 1 clockwise or counterclockwise with the workpiece 4 to be screwed as the center.

The fact that the second end 22 can move in a direction perpendicular to the above-mentioned rotation axis means that, in FIGS. 1 and 3 , the second end 22 can move parallel to the direction of the paper surface. Generally, in addition to the degree of freedom of rotation between two adjacent rotating units 23, other degrees of freedom are limited, and the second end 22 can only move in a direction parallel to the paper surface, and does not have degrees of freedom to move in other directions . Therefore, the rotating unit 23 surrounding the workpiece 4 to be screwed is not easy to move, maintains the current state, and can continuously clamp the outer wall of the workpiece 4 to be screwed.

From the comparison between FIG. 1 and FIG. 3 , it can be seen that the screwing tool acts on the workpiece 4 to be screwed with different specifications. In FIG. 1 , the size of the screwed workpiece 4 is large, and the length of the surrounding chain 2 surrounding it is large. In FIG. 3 , the size of the screwed workpiece 4 is small, and the length of the surrounding chain 2 surrounding it is small.

It should be noted that the connection of the connection and fixing structure 3 is releasable. After the screwing is completed, the connection is released, and the connection is made again for the next screwing.

In some embodiments, as shown in FIG. 1 and FIG. 3 , the handle 1 may be a rod-shaped structure, the head end of the handle 1 is a contact end 13 , and the surface of the contact end 13 is oriented in the same direction as the extension direction of the handle 1 . The length of the handle 1 is greater than 70mm and less than 300mm, and the distance between the first end 21 and the head end of the handle 1 is less than 25mm.

This embodiment specifies the length of the handle 1. Within this length, the handle 1 can support bolts with a nominal diameter of 8 mm to 64 mm, including most bolt specifications used in steel structures. And within this length range, the handle 1 is not too large, which is convenient to hold. It should be noted that when the size of the bolt is small, the size of the rotating unit 23 is small, otherwise the workpiece 4 to be screwed cannot be surrounded and stuck. It is difficult to process the rotating unit 23 with a particularly small size, and the manufacturing cost is high.

In addition to the rod-like structure, the handle 1 can also be a block-like structure, and the structure of the handle 1 can be adapted according to the usage scene when implementing this patent.

In some embodiments, as shown in FIG. 5 , the second side 12 is a plane structure, and the rotating unit 23 can abut against the second side 12 . When the rotating unit 23 is in contact with the second side 12, the handle 1 can be held by hand, and by the way, the surrounding chain 2 extending along the second side 12 can be pressed down, and the surrounding chain 2 can be fixed together with the connecting and fixing structure 3 to ensure a non-circular shape. The clamping hole 41 maintains the current shape and clamps the screwed workpiece 4 .

Although the first side 11 is also a plane structure in FIG. 5 , since the first side 11 is not used for the rotating unit 23 to abut against, in fact, the structure of the first side 11 is not limited.

In some embodiments, as shown in FIG. 1 and FIG. 3 , the first side 11 is fixedly provided with a holding block 14 that protrudes away from the second side 12 , and the holding block 14 is provided with a tab for inserting the tiger's mouth of the human hand. In the groove 141, after the tiger's mouth is placed in the groove 141, the bending of the fingers can make the rotating unit 23 within the coverage area of the human hand abut against the second side 12, so as to better ensure that the surrounding chain 2 is in a fixed state, so that the non-circular card hole 41 It can hold the screwed workpiece 4 continuously and firmly.

In some embodiments, the distance between the bottom end of the groove 141 and the second side 12 is greater than 30mm and less than 70mm, which matches the size of a general human hand, and can comfortably tighten the handle 1 and the part against the second side 12 around the chain 2 . Hold on tight.

In some embodiments, as shown in FIG. 2 , the above-mentioned connection and fixing structure 3 includes a first positioning hole 31 and a first insertion rod 32 , and the first positioning hole 31 is opened on the surface of the second side 12 and is directed to the inside of the handle 1 Extending, the number of the first positioning holes 31 is multiple and evenly distributed along the extension direction of the handle 1; A positioning hole 31 keeps the surrounding chain 2 in a taut state, the rotating unit 23 maintains the current position and posture, and maintains the non-circular clamping hole 41 to continuously clamp the workpiece 4 to be screwed. In this embodiment, the first insertion rod 32 is usually disposed on the rotating unit 23 corresponding to the second end 22 .

After the first insertion rod 32 is inserted into the first positioning hole 31, the surrounding chain 2 is in a taut state, and has a pulling force on the first insertion rod 32, and generally, the first positioning hole 31 is perpendicular to the second side 12, along the second side. The surrounding chain 2 extending from 12 is parallel to the second side 12, and the pulling force of the surrounding chain 2 on the first insertion rod 32 is perpendicular to the first insertion rod 32 itself, so that the outer wall of the first insertion rod 32 abuts against the hole of the first positioning hole 31 At this time, the pulling force of the surrounding chain 2 on the first insertion rod 32 is perpendicular to the first insertion rod 32 itself, so the first insertion rod 32 will not be pulled out from the first positioning hole 31, The first insertion rod 32 can be kept in the first positioning hole 31, and the surrounding chain 2 is kept in a taut state.

It should be noted that, if the processing technology and manufacturing materials allow, the spacing between the first positioning holes 31 should be as small as possible. Ideally, the first insertion rod 32 can just be inserted into one of the first positioning holes 31 when the surrounding chain 2 is in a taut state under any circumstances. In practice, this is difficult to achieve. After the enclosing chain 2 is tightened, the first insertion rod 32 often needs to move a short distance to find the position of the first positioning hole 31 closest to itself, so that the enclosing chain 2 is no longer in a taut state. . In this case, when the workpiece 4 to be screwed is rotated, the reaction force of the workpiece 4 to be screwed on the surrounding chain 2 can make it tighten, but the shape of the non-circular clamping hole 41 will change slightly, and this change will not affect As a result, the non-circular clamping hole 41 can still clamp the screwed workpiece 4 . The spacing of the first positioning holes 31 is about small, and the shape of the non-circular clamping holes 41 changes little, and the use effect is better. Otherwise, if the shape of the non-circular clamping hole 41 changes too much, the workpiece 4 to be screwed may not be clamped, resulting in failure of the operation.

In some embodiments, the rotating unit 23 is a rod-shaped structure with a rectangular cross section, and the length of the rotating unit 23 is less than 50 mm. In this embodiment, the end of the rotating unit 23 can be directly hinged with the adjacent rotating unit 23 through the rotating shaft, or can be rotatably connected with the adjacent rotating unit 23 through an intermediate unit, as shown in FIG. 2 and FIG. 4 .

In some embodiments, as shown in FIGS. 6 and 7 , the connection and fixing structure 3 includes a second insertion rod 33 and a second positioning hole 34 , and the second insertion rod 33 is fixed on the second side 12 and faces toward the second side 12 . The second positioning holes 34 are arranged on the surrounding chain 2, the number of the second positioning holes 34 is multiple and evenly distributed along the extending direction of the surrounding chain 2, and the second positioning holes 34 are used for tightening the surrounding chain 2 Then insert the second insertion rod 33, so that the second insertion rod 33 is clamped to the surrounding chain 2, so that the surrounding chain 2 is kept in a taut state, the rotating unit 23 maintains the current position and posture, maintains the non-circular clamping hole 41, and continues to be stuck. Workpiece 4 is screwed.

Specifically, the number of the second insertion rods 33 is three. If the number of the second insertion rods 33 is too large, it is easy to get stuck, and if the number is too small, it is easy to get stuck. Different from the previous embodiment, in this embodiment, the insertion rod is arranged on the handle 1 , and the positioning hole is arranged on the surrounding chain 2 . This setting method is feasible, but has a disadvantage, that is, due to the limitation of the manufacturing process, the spacing of the second positioning holes 34 cannot be arbitrarily set, and cannot be set on the handle 1 like the first positioning holes 31, and the spacing can be reduced as much as possible. .

In some embodiments, the surrounding chain 2 is a roller chain, and the pitch is less than or equal to 8 mm. The roller chain is an existing component, which is easy to obtain and has stable quality, and the gap between the rollers can be used as the second positioning hole 34 .

In some embodiments, as shown in FIG. 8 , the handle 1 is a linear structure, and the handle 1 is provided with a screw 5 parallel to itself. out, and tighten the screwed workpiece 4. After the encircling chain 2 hoops the screwed workpiece 4, the screw 5 is used to push the screwed workpiece 4, which can eliminate the deformation allowance of the enclosing chain 2, fix the shape of the non-circular clamping hole 41, and ensure that the screwed workpiece is clamped. 4.

In this embodiment, after the screw 5 presses the screwed workpiece 4, the rotating unit 23 enclosing the non-circular clamping hole 41 and the head of the screw 5 and the outer wall of the screwed workpiece 4 have a large pressing force, which can produce With enough friction force, even if the outer wall of the workpiece 4 to be screwed is cylindrical, the screwing can be realized.

Specifically, the rear end of the screw rod 5 is provided with a handle 51 for rotating the screw rod 5 .

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (10)

1. A turning tool, comprising:

a handle provided with a contact end for abutting against a workpiece to be screwed;

the enclosing chain comprises a plurality of rotating units which are connected in sequence, two ends of each rotating unit are respectively and rotatably connected with the end parts of the adjacent rotating units, the rotating axes of the rotating units are parallel to each other, the first end of the enclosing chain is fixed on the first side of the handle, and the second end of the enclosing chain can move in the direction perpendicular to the rotating axes, bypasses the screwed workpiece and reaches the second side, opposite to the first side, of the handle; and

and the connecting and fixing structure is used for fixedly connecting any rotating unit reaching the second side with the second side after being tensioned, so that the rotating unit on the periphery of the screwed workpiece and the interference end form a non-circular clamping hole capable of clamping the screwed workpiece, at the moment, the rotating unit on the periphery of the screwed workpiece surrounds and abuts against the outer wall of the screwed workpiece and is kept relatively fixed with the interference end, and the shape of the non-circular clamping hole is unchanged.

2. The turning tool of claim 1, wherein the handle is of a rod-like configuration, the head end of the handle is the abutment end, the surface of the abutment end faces in a direction that is coincident with the direction of extension of the handle, the length of the handle is greater than 70mm and less than 300mm, and the first end is less than 25mm from the head end.

3. The turning tool of claim 2, wherein the second side is a planar structure against which the rotary unit can abut.

4. The screwing tool as defined in claim 3, wherein a holding block extending away from the second side is fixedly provided on the first side, a groove for receiving a thumb web of a human hand is provided on the holding block, and after the thumb web is received in the groove, fingers are bent to enable the rotating unit within the range covered by the human hand to be attached to the second side.

5. The turning tool of claim 4, wherein the bottom end of the recess is spaced from the second side a distance greater than 30mm and less than 70 mm.

6. The turning tool of claim 5, wherein the connection securing structure comprises:

the first positioning holes are formed in the surface of the second side and extend towards the interior of the handle, and the number of the first positioning holes is multiple and is uniformly distributed along the extending direction of the handle; and

the first inserting rod is fixedly arranged at the second end and used for being inserted into the first positioning hole after the surrounding chain is tensioned, so that the surrounding chain is kept in a tensioned state, and the rotating unit keeps the current position and posture.

7. The screwing tool as defined in claim 6, wherein said rotary unit is of a rod-like structure and has a rectangular cross section, and a length of said rotary unit is less than 50 mm.

8. The turning tool of claim 5, wherein the connection securing structure comprises:

the second inserting rod is fixedly arranged on the second side and extends out of the second side; and

the second positioning holes are formed in the surrounding chain, the number of the second positioning holes is multiple, the second positioning holes are evenly distributed along the extending direction of the surrounding chain, the second positioning holes are used for being sleeved into the second inserting rods after the surrounding chain is tightened, the second inserting rods clamp the surrounding chain tightly, the surrounding chain is kept in a tightening state, and the rotating unit keeps the current position and the current posture.

9. The screwing tool of claim 8, wherein the enveloping chain is a roller chain and the pitch is 8mm or less.

10. The screwing tool as defined in claim 2, wherein the handle is a straight structure, a screw rod parallel to the handle is inserted into the handle, the screw rod is connected to the handle through a screw thread, and a head of the screw rod can extend out from the abutting end to press against the screwed workpiece.

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