Wrench

Abstract

The utility model relates to a wrench which comprises a handle, one end of the handle is provided with an annular clamping portion, the clamping portion comprises a near-end clamping face and a far-end clamping face, the opposite faces of the two side portions of the near-end clamping face extend outwards, and the opposite faces of the two side portions of the far-end clamping face contract inwards. An adjusting structure used for adjusting the clamping space in the clamping part is arranged between the handle and the clamping part, the adjusting structure comprises an adjusting hole, an adjusting screw head and an adjusting screw rod connected with the adjusting screw head, and the adjusting screw head is arranged on the side, away from the clamping part, in the adjusting hole; the adjusting screw rod is close to one side of the clamping part; the inner wall of the adjusting screw head and the inner wall of the adjusting hole are both provided with threads matched with each other, and the adjusting screw penetrates through the adjusting hole and the clamping part. By means of the design, clamped pieces of different sizes can be abutted, better stress fixation is achieved, and the problems of slipping and falling in the clamping / screwing process can be solved.

Description

Technical Field

[0001] The utility model relates to the field of tools for daily use, in particular to a wrench. Background Art

[0002] The existing conventional single-head wrench structure has some disadvantages, which are mainly reflected in the following two aspects: first, the jaw size of the single-head wrench is fixed and can only adapt to a specific pipe diameter range. It cannot effectively clamp water pipes outside this range; secondly, during the use of the single-head wrench, the operator often applies uneven force, causing the wrench and the clamped part to slip.

[0003] Prior art patent: CN207915343U, discloses a movable ratchet wrench for mechanical assembly, a rotating handle, a built-in bidirectional ratchet, an inner triangular fixing plate, a rotating locking bolt, a ratchet steering adjustment switch, a ratchet upper cover plate, a hexagonal connecting rod, a connecting rod return spring, and a pawl. However, in actual operation, the movable ratchet often slips due to uneven force or excessive force. Utility Model Content

[0004] The purpose of the utility model is to provide a wrench to solve the problems raised in the above background technology.

[0005] The utility model solves the technical problem by adopting the following technical scheme: a wrench, comprising a handle, one end of which is provided with an annular clamping portion, the clamping portion comprising a proximal clamping surface and a distal clamping surface, the opposite surfaces of the two sides of the proximal clamping surface are in an outwardly extending shape, and the opposite surfaces of the two sides of the distal clamping surface are in an inwardly contracted shape;

[0006] An adjustment structure for adjusting the clamping space inside the clamping part is provided between the handle and the clamping part, and the adjustment structure includes an adjustment hole, an adjustment screw head, and an adjustment screw connected to the adjustment screw head. The adjustment screw head is provided on a side of the adjustment hole away from the clamping part, and the adjustment screw is provided on a side of the adjustment hole close to the clamping part. The adjustment screw head and the inner wall of the adjustment hole are both provided with mutually matching threads, and the adjustment screw passes through the adjustment hole and the clamping part. The adjustment screw head is only located in the adjustment hole, and the adjustment screw is located in the adjustment hole and / or the clamping part.

[0007] The preferred solution is as follows:

[0008] The length of the adjustment hole is greater than the length of the adjustment screw head, so that the adjustment screw head can be guaranteed to have adjustment space for rotating up and down.

[0009] The sum of the width of the connection end surface between the adjustment structure and the clamping portion plus the length of the adjustment hole is not less than the sum of the lengths of the adjustment screw head and the adjustment screw rod, thereby ensuring that the adjustment screw rod can be completely retracted into the adjustment hole without affecting the original use of the annular clamping portion.

[0010] The width of the connecting end surface is smaller than the length of the adjusting screw.

[0011] The end of the adjusting screw is provided with a blocking piece, which is arranged outside the distal end surface of the connecting end surface to prevent the adjusting screw from slipping out of the mounting hole.

[0012] The side lengths of the two sides of the distal clamping surface are longer than the side lengths of the two sides of the proximal clamping surface. Such irregular hexagonal annular clamping portion openings can adapt to different pipe diameters and can also be used to clamp and screw bolts and nuts of different sizes.

[0013] The adjusting structure is fixedly connected to the clamping part, and the adjusting structure is plug-connected to the handle, so that it is convenient to replace clamping parts of different models and sizes.

[0014] The other end of the handle is provided with a static jaw clamp and a movable jaw clamp hinged to the static jaw clamp, and the movable jaw clamp has an arc-shaped area that can accommodate the part to be clamped; this design can be a single-head wrench or a double-head wrench, and can be set according to the needs of the user or actual production.

[0015] The inner wall of the arc-shaped area is provided with ratchet teeth, and the clamping surface of the clamping part is provided with ratchet teeth.

[0016] The teeth of the ratchet protrude in the outward extension direction, and the teeth on both sides of the corresponding surface are symmetrically arranged; or the teeth of the ratchet protrude in the inward extension direction, and the teeth on both sides of the corresponding surface are symmetrically arranged. A ratchet is a mechanical structure designed to increase friction to prevent sliding. This ensures that the parts maintain relative positions during movement and prevents slippage due to vibration or impact. The ratchet can be straight or helical, providing a stable connection by meshing with the part to be clamped. The ratchet can also be used to prevent reverse movement, ensuring that when the knob is clamped, it can only move in one direction to prevent slipping during the twisting process.

[0017] The angle between the distal end surface of the distal clamping surface and the end surfaces on both sides ranges from 95 to 135 degrees.

[0018] The beneficial effects of the wrench of the utility model are as follows: the annular clamping part at one end of the handle can be used to clamp pipes, bolts and nuts of different sizes; the adjusting screw head is rotated up and down in the adjusting hole through the thread to drive the adjusting screw to slide up and down in the clamping space inside the clamping part; specifically, when the adjusting screw head is rotated to the top end of the adjusting hole (i.e., the end away from the clamping part), the adjusting screw is retracted into the adjusting hole or the connecting end surface of the adjusting structure and the clamping part, and the use of the original annular clamping part is not affected; when the adjusting screw head is rotated downward to the bottom end of the adjusting hole (i.e., the end close to the clamping part), the adjusting screw is extended into the clamping space inside the clamping part, which can resist the clamped parts of different sizes, achieve better force fixation, and prevent the problem of slipping and falling off during the clamping / twisting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is an enlarged schematic diagram of a local structure of the utility model;

[0021] Figure 2 This is a diagram of the use state of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the utility model;

[0023] The symbols in the accompanying drawings are described as follows:

[0024] 1. Static jaw clamp, 2. Dynamic jaw clamp, 3. Ratchet, 4. Handle, 5. Proximal clamping surface, 6. Distal clamping surface, 7. Connecting end surface, 8. Adjusting screw head, 9. Adjusting screw, 10. Blocking piece, 11. Adjusting hole. DETAILED DESCRIPTION

[0025] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0026] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0027] Embodiment 1:

[0028] A wrench, comprising a handle 4, one end of which is provided with an annular clamping portion, the clamping portion comprising a proximal clamping surface 5 and a distal clamping surface 6, the opposite surfaces of the two sides of the proximal clamping surface 5 are in an outwardly extending shape, and the opposite surfaces of the two sides of the distal clamping surface 6 are in an inwardly contracted shape;

[0029] An adjustment structure for adjusting the clamping space inside the clamping part is provided between the handle 4 and the clamping part, and the adjustment structure includes an adjustment hole 11, an adjustment screw head 8, and an adjustment screw rod 9 connected to the adjustment screw head. The adjustment screw head 8 is provided on a side of the adjustment hole 11 away from the clamping part, and the adjustment screw rod 9 is provided on a side of the adjustment hole 11 close to the clamping part; the inner walls of the adjustment screw head 8 and the adjustment hole 11 are provided with mutually matching threads, and the adjustment screw rod 9 passes through the adjustment hole 11 and the clamping part. The adjustment screw head 8 is only located in the adjustment hole, and the adjustment screw rod 9 is located in the adjustment hole 11.

[0030] The length of the adjustment hole 11 is greater than the length of the adjustment screw head 8. This ensures that the adjustment screw head 8 has an adjustment space for rotating up and down. The length described here refers to the length measurement in the up and down direction from the accompanying drawings.

[0031] The sum of the width H1 of the connection end surface 7 between the adjustment structure and the clamping portion plus the length of the adjustment hole 11 is not less than the sum of the lengths of the adjustment screw head 8 and the adjustment screw 9. This ensures that the adjustment screw 9 can be completely retracted into the adjustment hole 11 without affecting the original use of the annular clamping portion.

[0032] The width H1 of the connecting end surface 7 is smaller than the length of the adjusting screw 9 .

[0033] The side lengths of the two sides of the distal clamping surface 6 are longer than the side lengths of the two sides of the proximal clamping surface 5. Such irregular hexagonal annular clamping portion openings can adapt to different pipe diameters and can also be used to clamp and screw bolts and nuts of different sizes.

[0034] The adjusting structure is fixedly connected to the clamping part, and the adjusting structure is plug-connected to the handle 4, so that it is convenient to replace clamping parts of different models and sizes.

[0035] A ratchet 3 is arranged on the clamping surface of the clamping portion.

[0036] The teeth of the ratchet 3 are protruding in the outward extension direction, and the teeth on both sides of the corresponding surface are symmetrically arranged; the ratchet 3 is a mechanical structure designed to increase friction to prevent sliding. To ensure that the parts maintain relative positions during movement and prevent slippage due to vibration or impact. The ratchet 3 can be straight teeth or helical teeth, and provide a stable connection by meshing with the part to be clamped. The ratchet can also be used to prevent reverse movement, ensuring that when the knob is clamped, it can only move in one direction to prevent slipping during the twisting process.

[0037] The angle between the distal end surface of the distal clamping surface 6 and the end surfaces on both sides ranges from 95 to 135 degrees.

[0038] In specific operation, the adjusting screw head 8 and the adjusting screw rod 9 will only move up and down when the user rotates them, and remain fixed in other cases. In specific use, the clamping part first covers the clamped object:

[0039] 1) When the required tightening force is relatively small, the adjusting screw head 8 can be screwed to the end of the adjusting hole 11 near the handle, and the adjusting screw rod 9 does not push out of the mounting hole. The ratchet teeth of the wrench opening can be used to quickly screw the clamped part;

[0040] 2) When the required tightening force is relatively large, the adjusting screw head 8 is screwed outward, and the adjusting screw 9 is pushed out of the mounting hole and pressed against the part to be clamped. Not only does the ratchet 3 have an anti-slip effect on the part to be clamped, but it can also further provide friction and support force, thereby avoiding slipping and falling off during the screwing process.

[0041] Embodiment 2:

[0042] This embodiment is basically the same as the first embodiment, except that a static jaw clamp 1 and a movable jaw clamp 2 hinged to the static jaw clamp 1 are provided at the other end of the handle, and the movable jaw clamp 2 has an arc-shaped area that can accommodate the part to be clamped; this design can be a single-head wrench or a double-head wrench, which can be set according to the needs of the user or actual production. A ratchet 3 is provided on the inner wall of the arc-shaped area.

[0043] Embodiment 3:

[0044] This embodiment is basically the same as the first embodiment, except that the top end of the adjusting screw 9 is located inside the clamping portion, that is, inside the proximal clamping surface 5 .

[0045] Embodiment 4:

[0046] This embodiment is basically the same as the embodiment 1, except that a blocking piece 10 is provided at the end of the adjusting screw 9. The blocking piece 10 is provided outside the distal end surface of the connecting end surface 7 to prevent the adjusting screw 9 from slipping out of the mounting hole.

[0047] Embodiment 5:

[0048] This embodiment is basically the same as the embodiment 1, except that the teeth of the ratchet 3 are protruding in the inward extension direction, and the teeth on both sides of the corresponding surface are symmetrically arranged.

[0049] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A wrench, characterized in that: The invention comprises a handle (4), wherein one end of the handle (4) is provided with an annular clamping portion, wherein the clamping portion comprises a proximal clamping surface (5) and a distal clamping surface (6), wherein the opposing surfaces of the two side portions of the proximal clamping surface (5) are in an outwardly extending shape, and the opposing surfaces of the two side portions of the distal clamping surface (6) are in an inwardly contracting shape; An adjustment structure for adjusting the clamping space inside the clamping portion is provided between the handle (4) and the clamping portion, the adjustment structure comprising an adjustment hole (11), an adjustment screw head (8), and an adjustment screw rod (9) connected to the adjustment screw head (8), the adjustment screw head (8) being arranged on a side of the adjustment hole (11) away from the clamping portion, and the adjustment screw rod (9) being arranged on a side of the adjustment hole (11) close to the clamping portion; the inner walls of the adjustment screw head (8) and the adjustment hole (11) are both provided with mutually matching threads, and the adjustment screw rod (9) passes through the adjustment hole (11) and the clamping portion.

2. The wrench according to claim 1, characterized in that: The length of the adjustment hole (11) is greater than the length of the adjustment screw head (8).

3. The wrench according to claim 2, characterized in that: The sum of the width of the connecting end surface (7) of the adjustment structure and the clamping portion plus the length of the adjustment hole (11) is not less than the sum of the lengths of the adjustment screw head (8) and the adjustment screw rod (9).

4. The wrench according to claim 3, characterized in that: The width of the connecting end surface (7) is smaller than the length of the adjusting screw (9).

5. The wrench according to claim 1, characterized in that: A blocking piece (10) is provided at the end of the adjusting screw rod (9).

6. The wrench according to claim 1, characterized in that: The side lengths of the two side portions of the distal clamping surface (6) are longer than the side lengths of the two side portions of the proximal clamping surface (5).

7. The wrench according to claim 1, characterized in that: The adjustment structure is fixedly connected to the clamping portion, and the adjustment structure is plug-connected to the handle (4).

8. The wrench according to claim 1, characterized in that: The other end of the handle (4) is provided with a stationary jaw clamp (1) and a movable jaw clamp (2) hingedly connected to the stationary jaw clamp (1), and the movable jaw clamp (2) has an arc-shaped area capable of accommodating a piece to be clamped; The inner wall of the arc-shaped area is provided with ratchet teeth (3), and the clamping surface of the clamping portion is provided with ratchet teeth (3).

9. The wrench according to claim 8, characterized in that: The teeth of the ratchet (3) are protruding in an outward extending direction, and the teeth on both sides of the corresponding surface are symmetrically arranged; or The teeth of the ratchet (3) are protruding in an inwardly extending direction, and the teeth on both sides of the corresponding surface are symmetrically arranged.

10. The wrench according to claim 1, characterized in that: The angle between the distal end surface of the distal clamping surface (6) and the end surfaces on both sides ranges from 95 to 135 degrees.

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