Chain type wrench for disassembling threaded part

Abstract

The utility model discloses a chain-type wrench used for dismounting a threaded piece in the field of chain-type wrenches, which comprises a grip and anti-skidding lines arranged on the outer cambered surface of the grip, one end of the grip is connected with a connecting piece, the side surface of the connecting piece is provided with a through sliding groove, the side surface of the inner wall of the sliding groove is connected with a chain in a sliding manner, and the connecting piece is rotatably connected with a limiting part. The special-shaped bolt butt joint device is characterized in that a connecting piece is arranged on the handle, the side, away from the handle, of the connecting piece is connected with an abutting component, the side face of the chain is connected with a plurality of gaskets distributed at equal intervals, and the gaskets are arranged on the side, facing the abutting component, of the chain. And compared with a traditional device, the chain of the device can be locked and collected, so that the wrapping degree of the side face of the special-shaped bolt is better in the actual use process, meanwhile, higher rotating friction force can be provided for the device, and the risk that the device slips in the use process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chain spanners, in particular to a chain spanner used for disassembling threaded parts. Background Art

[0002] As we all know, a wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts and other threaded fasteners that hold bolts or nuts. The wrench is usually made of structural steel made of carbon or alloy materials. There are basically two types of wrenches, fixed wrenches and adjustable wrenches. The former refers to a wrench with a fixed number written on it, and the latter is an adjustable wrench. Fixed wrench: One or both ends are made with an opening of fixed size to turn nuts or bolts of a certain size. Plum wrench: Both ends have working ends with hexagonal holes or twelve-pointed holes, which are suitable for occasions where the working space is small and ordinary wrenches cannot be used. Two-purpose wrench: One end is the same as a single fixed wrench, and the other end is the same as a plum wrench. Both ends turn bolts or nuts of the same specifications. Adjustable wrench: The opening width can be adjusted within a certain size range, and can turn bolts or nuts of different specifications. When using existing wrenches, most of them can only be used for threaded parts of fixed sizes. Some threaded parts are large, that is, they need to be replaced with large wrenches for disassembly. However, the frequency of use of large wrenches is low, which invisibly reduces the frequency of use of wrenches and leads to waste of resources. At the same time, when only the top of the threaded rod is used to contact the threaded part to be disassembled, the contact area is small. When disassembling a larger threaded part, due to the small contact area between the top of the threaded rod and the threaded part, the disassembly method of the threaded part is more laborious and inconvenient.

[0003] A Chinese patent with announcement number CN214445912U discloses a chain spanner for disassembling threaded parts. The utility model of the chain spanner for disassembling threaded parts includes a chain body, a base plate and a threaded rod. The middle part of the base plate is provided with threaded holes penetrating the chain body on both sides. The chain body is located on one side of the base plate, and its two ends are respectively connected to the two ends of the base plate. A clamping area for clamping the threaded parts is formed between the chain body and the base plate. The threaded rod passes through the threaded hole and is threadedly connected to the threaded hole. One end of the threaded rod extends into the clamping area, and a strip-shaped fixed clamping part extending toward the two ends of the base plate is provided at the end portion. The two ends of the clamping part are respectively provided with a retractable movable clamping part along the length direction thereof. Advantages: The structural design is simple and reasonable, and the contact area between the fixed clamping part and the threaded part can be adjusted according to the size of the threaded part, thereby improving the stability of disassembly and making the operation more labor-saving.

[0004] However, the above - disclosed solutions have the following deficiencies: In the above - mentioned solution, when in use, the abutting structure controlled by threads cooperates with the chain to connect the special - shaped bolt. In actual use, the above - mentioned device only generates a squeezing effect on the bolt on the side where the abutting structure contacts the bolt and on the side of the chain directly opposite the abutting structure. Therefore, when the rotational resistance of the bolt is large, problems such as slipping are likely to occur in the above - mentioned device. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] The purpose of the present invention is to address the technical problems existing in the background technology. The present invention proposes a chain - type wrench for disassembling threaded parts. Through this device, the present invention can effectively improve the docking contact stability of special - shaped bolts. Compared with traditional devices, the chain of this device can be locked and retracted, so that when in actual use, it can better wrap the side of the special - shaped bolt and provide higher rotational friction for this device, thereby reducing the risk of slipping when this device is used.

[0007] The present invention proposes a chain - type wrench for disassembling threaded parts, which includes a grip and anti - slip patterns provided on its outer arc surface. One end of the grip is connected to a connecting piece, and a through - sliding groove is provided on the side surface of the connecting piece. The inner side surface of the sliding groove is slidably connected to a chain. The connecting piece is rotatably connected to a limiting component, and the side of the connecting piece away from the grip is connected to an abutting component. A plurality of gaskets are connected to the side surface of the chain at equal intervals, and the gaskets are arranged on the side of the chain facing the abutting component.

[0008] By adopting the above - mentioned technical solution, the combined structure of the grip and the anti - slip patterns in this solution can effectively improve the holding stability of this device, reduce the risk of slipping at the grip of this device, and at the same time, the grip structure of this device increases the torque during the process of the user rotating and driving the special - shaped bolt, thus achieving a labor - saving effect.

[0009] Preferably, the limiting component includes a rotating shaft rotatably penetrating through the connecting piece. A sprocket is connected to the bottom of the rotating shaft, and the sprocket is meshed with the chain and is rotatably connected to the inner wall of the sliding groove.

[0010] By adopting the above - mentioned technical solution, the combination of the sprocket and the chain in this solution can achieve the effect of stably driving the chain of this device. At the same time, the structure of the sliding groove can limit the sliding of the chain to prevent problems such as the chain tilting.

[0011] Preferably, the inner wall of the rotating shaft is hollow, the inner arc surface of the rotating shaft is provided with sliding protrusions, the inner wall of the rotating shaft is slidably connected with a sliding rod, the outer arc surface of the sliding rod is provided with a sliding groove, the sliding groove is slidably connected with the sliding protrusions, the top of the sliding rod is connected with a rotating handle, the connecting member is connected with a limiting housing, the limiting housing covers the outside of the rotating shaft, and the inner wall of the limiting housing contacts the outside of the rotating handle.

[0012] By adopting the above technical solution, the combination of the slidable sliding rod and the rotating shaft in this solution can achieve the effect of switching between rotation and locking of the device. The combination of the sliding groove and the sliding protrusions can ensure that the sliding rod does not rotate relative to the rotating shaft, thereby ensuring the stable rotation transmission of the device.

[0013] Preferably, the abutting member includes a spring housing connected to the side of the connecting member. A plurality of springs are connected to the inner wall of the spring housing, and the other ends of the springs are connected to an abutting member, and the abutting member faces the direction of the chain.

[0014] By adopting the above technical solution, the structure of the spring and the abutting member in this solution can achieve the independent fitting effect of the device, so that the device can compatibly fit the side shape of the special-shaped bolt and improve the side contact area of the device.

[0015] Preferably, two limiting members are symmetrically arranged on both sides of the connecting member, and both ends of the chain are respectively connected to the two limiting members.

[0016] By adopting the above technical solution, the symmetrical limiting members in this solution can respectively adjust the chain. When the rotating handle on one side cannot be locked and limited at a suitable position, one end of the limiting member can be locked first and then adjusted through the limiting member at the other end, thereby ensuring the stable winding of the chain.

[0017] Preferably, the outer end face of the gasket is provided with an anti-slip layer, the outer end face of the abutting member is provided with a buffer pad, the outer end face of the buffer pad is provided with an anti-slip layer, the buffer pad is arranged at the gap between the sides of a plurality of abutting members, and the plurality of springs inside the spring housing work independently.

[0018] By adopting the above technical solution, the independent springs and abutting members in this solution can respectively contact and fit the side of the special-shaped bolt, so as to adapt to special-shaped bolts of different shapes.

[0019] Preferably, a connecting spring is provided at the bottom of the inner arc surface of the end of the rotating shaft far from the rotating handle, and the other end of the connecting spring is connected to the bottom of the sliding rod.

[0020] By adopting the above technical solution, the sliding rod of the device can be elastically rebounded inside through the structure connecting the spring, so as to ensure the stable limit docking between the rotating handle and the limit housing.

[0021] In summary, the utility model has at least one of the following beneficial effects:

[0022] Through the multi-group independent abutting member structure of the device, the effect of the device fitting the side of the special-shaped bolt can be achieved, thus avoiding the problem of the small contact area between the side of the connecting member and the side of the special-shaped bolt. At the same time, through the combination of the rotating handle and the limit housing of the device, the current retraction state of the chain can be locked and limited, thus ensuring the adaptability and stability of the device. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is the front view of an embodiment of a chain wrench for removing threaded parts of the present utility model;

[0025] Figure 2 It is the structural schematic diagram of the chain in the embodiment of the present utility model;

[0026] Figure 3 It is the structural schematic diagram of the abutting member in the embodiment of the present utility model;

[0027] Figure 4 It is the structural schematic diagram of the limit member in the embodiment of the present utility model;

[0028] Reference numerals: 1, grip; 2, anti-slip pattern; 3, connecting member; 4, sliding groove; 5, chain; 6, limit member; 601, rotating shaft; 602, sliding rod; 603, limit groove; 604, rotating handle; 605, sprocket; 606, limit housing; 7, gasket; 8, abutting member; 801, spring housing; 802, spring; 803, abutting piece. Detailed Description of the Embodiments

[0029] The following is a further detailed description of the present utility model in conjunction with the attached Figures 1-4 drawings.

[0030] Embodiment 1, as Figures 1-4As shown, in this embodiment, in order to solve the existing problems, the present utility model discloses a chain wrench for removing threaded parts, which includes a grip 1 and anti-slip patterns 2 provided on its outer arc surface. One end of the grip 1 is connected to a connecting piece 3. A through sliding groove 4 is provided on the side surface of the connecting piece 3. A chain 5 is slidably connected to the inner side surface of the sliding groove 4. The connecting piece 3 is rotatably connected to a limiting component 6. A side of the connecting piece 3 away from the grip 1 is connected to an abutting component 8. A plurality of gaskets 7 are equally spaced and distributed on the side surface of the chain 5. The gaskets 7 are arranged on a side of the chain 5 facing the abutting component 8.

[0031] The limiting component 6 includes a rotating shaft 601 rotatably penetrating and connecting with the connecting piece 3. A sprocket 605 is connected to the bottom of the rotating shaft 601. The sprocket 605 is meshed with the chain 5. The sprocket 605 is rotatably connected to the inner wall of the sliding groove 4.

[0032] The inner wall of the rotating shaft 601 is hollow. A sliding protrusion is provided on the inner arc surface of the rotating shaft 601. A sliding rod 602 is slidably connected to the inner wall of the rotating shaft 601. A limiting groove 603 is provided on the outer arc surface of the sliding rod 602. The limiting groove 603 is slidably connected to the sliding protrusion. A rotating handle 604 is connected to the top of the sliding rod 602. The connecting piece 3 is connected to a limiting housing 606. The limiting housing 606 covers the outside of the rotating shaft 601. The inner wall of the limiting housing 606 contacts the outside of the rotating handle 604.

[0033] The abutting component 8 includes a spring housing 801 connected to the side surface of the connecting piece 3. A plurality of springs 802 are connected to the inner wall of the spring housing 801. The other ends of the springs 802 are connected to an abutting piece 803. The abutting piece 803 faces the direction of the chain 5.

[0034] The specific working principle is that this device can effectively improve the driving stability for special-shaped bolts. Compared with traditional devices, this device can achieve a full-wrap effect on the side surface of special-shaped bolts through the chain 5 that can be retracted and fixed, so that the force on the side surface of the special-shaped bolts is more uniform, ensuring the stability of the transmission and unlocking of this device.

[0035] When the device is in use, by sleeving the special-shaped bolt in the loop formed by the chain 5, at this time, the sliding rod 602 is pulled upward. The rising of the sliding rod 602 causes the rotating handle 604 to disengage from the inside of the limit housing 606, so that the rotating handle 604 can rotate freely. By rotating the rotating handle 604, the sprocket 605 at the bottom of the rotating shaft 601 can be driven to rotate, thereby achieving the effect of winding up the chain 5. When the rotating handle 604 rotates to a suitable position, at this time the chain 5 is already in close contact with the side of the special-shaped bolt. Press the rotating handle 604 back into the inside of the limit housing 606, so as to achieve the effect of locking the rotation of the current rotating handle 604 and prevent the chain 5 from accidentally loosening during use. After adjusting one side of the rotating handle 604, perform the same operation on the other side of the rotating handle 604 to ensure that the chain 5 is tightened.

[0036] During the adjustment process of the chain 5, due to the winding up of the chain 5, the special-shaped bolt is in close contact with the side of the chain 5, and then the gasket 7 contacts the side of the special-shaped bolt. At the same time, the other side of the special-shaped bolt contacts the abutting member 8. Due to the structure of several independent springs 802 inside the abutting member 8, a plurality of independent abutting pieces 803 can be made to fit on the side of the special-shaped bolt, so that the abutting pieces 803 can adapt to the protrusions or grooves on the side of the special-shaped bolt for contact extrusion. Furthermore, while increasing the contact area of the device with the side of the special-shaped bolt, an elastic self-adaptive effect can be achieved.

[0037] When the chain 5 is in close contact with the side of the special-shaped bolt through the gasket 7 and the special-shaped bolt is in close contact with the abutting member 8, at this time, the rotation effect of the special-shaped bolt is achieved through the grip 1.

[0038] Embodiment 2, as Figures 1-4 shown, in this embodiment, in order to solve the existing problems, based on the same concept as in Embodiment 1 above, the chain wrench for disassembling threaded parts further includes: two limit parts 6 are symmetrically arranged on both sides of the connecting part 3, and both ends of the chain 5 are respectively connected to the two limit parts 6.

[0039] The outer end face of the gasket 7 is provided with an anti-slip layer, the outer end face of the abutting piece 803 is provided with a buffer pad, the outer end face of the buffer pad is provided with an anti-slip layer, the buffer pad is arranged at the gap between the sides of several abutting pieces 803, and several of the springs 802 inside the spring housing 801 work independently.

[0040] At the bottom of the inner arc surface of the end of the rotating shaft 601 away from the rotating handle 604, a connecting spring is provided, and the other end of the connecting spring is connected to the bottom of the sliding rod 602.

[0041] The specific working principle is as follows: The gasket 7 structure of this device can prevent the side of the chain 5 from directly contacting the side of the special-shaped bolt, thereby ensuring the stable contact of this device and increasing the side contact area with the special-shaped bolt.

[0042] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A chain wrench for removing threaded parts, comprising a grip (1) and anti-slip lines (2) provided on its outer arc surface, characterized in that, One end of the grip (1) is connected with a connecting piece (3). A through sliding groove (4) is arranged on the side surface of the connecting piece (3). A chain (5) is slidably connected to the inner side surface of the inner wall of the sliding groove (4). The connecting piece (3) is rotatably connected with a limiting component (6). One side of the connecting piece (3) far away from the grip (1) is connected with a abutting component (8). A plurality of gaskets (7) are equally spaced and distributed on the side surface of the chain (5). The gaskets (7) are arranged on the side of the chain (5) facing the abutting component (8).

2. The chain wrench for disassembling threaded parts according to claim 1, wherein The limiting component (6) includes a rotating shaft (601) rotatably penetrating through the connecting piece (3). A sprocket (605) is connected to the bottom of the rotating shaft (601). The sprocket (605) is meshed with the chain (5). The sprocket (605) is rotatably connected to the inner wall of the sliding groove (4).

3. The chain wrench for removing threaded parts according to claim 2, characterized in that, The inner wall of the rotating shaft (601) is hollow. A sliding protrusion is arranged on the inner arc surface of the rotating shaft (601). A sliding rod (602) is slidably connected to the inner wall of the rotating shaft (601). A limiting groove (603) is arranged on the outer arc surface of the sliding rod (602). The limiting groove (603) is slidably connected with the sliding protrusion. A rotating handle (604) is connected to the top of the sliding rod (602). The connecting piece (3) is connected with a limiting shell (606). The limiting shell (606) covers the outside of the rotating shaft (601). The inner wall of the limiting shell (606) is in contact with the outer side of the rotating handle (604).

4. A chain wrench for removing threaded parts according to claim 3, characterized in that, The abutting component (8) includes a spring shell (801) connected to the side surface of the connecting piece (3). A plurality of springs (802) are connected to the inner wall of the spring shell (801). The other ends of the springs (802) are connected with an abutting piece (803). The abutting piece (803) faces the direction of the chain (5).

5. A chain wrench for removing threaded parts according to claim 4, characterized in that, Two limiting components (6) are symmetrically arranged on both sides of the connecting piece (3). The two ends of the chain (5) are respectively connected with the two limiting components (6).

6. The chain wrench for removing threaded parts according to claim 5, characterized in that, The outer end surface of the gasket (7) is provided with an anti-slip layer. The outer end surface of the abutting piece (803) is provided with a buffer pad. The outer end surface of the buffer pad is provided with an anti-slip layer. The buffer pad is arranged at the gap between the side surfaces of a plurality of abutting pieces (803). A plurality of the springs (802) inside the spring shell (801) work independently.

7. A chain wrench for removing threaded parts according to claim 6, characterized in that, A connecting spring is arranged at the bottom of the inner arc surface of the end of the rotating shaft (601) far away from the rotating handle (604). The other end of the connecting spring is connected with the bottom of the sliding rod (602).

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