Pipe drawing wrench

Abstract

The embodiment of the utility model provides a pipe drawing wrench which comprises a first wrench body, a second wrench body, a third wrench body, a first elastic reset piece and a second elastic reset piece. The second clamp body comprises an operating handle and a movable clamping block; the operating handle is pivoted on the first clamp body by virtue of a first rotating shaft; a pushing part is arranged at the front end of the operating handle deviating from the first rotating shaft; the movable clamping block is directionally and slidably assembled on the first clamp body; the first elastic reset piece comprises a first reset spring which is arranged on the first clamp body and used for promoting the movable clamping block to be away from the fixed clamping block, the third clamp body is pivoted to the first clamp body through a second rotating shaft, and the front end of the third clamp body is provided with an abutting joint used for abutting against the outer wall of the main body. The abutting portion of the operating handle abuts against the movable clamping block so that the movable clamping block and the fixed clamping block can be matched to clamp a pipe fitting, and when the first clamp body rotates relative to the third clamp body, the first clamp body is driven by the first clamp body to be pulled out of the main body. The embodiment of the utility model is simpler and more convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting disassembly and assembly devices, and in particular to a pipe puller. Background Technology

[0002] A pipe puller is a tool that allows users to easily remove pipe fittings from a main body (e.g., a pipe adapter). One type of pipe puller includes a first clamping body, a second clamping body whose front end is pivotally connected to the first clamping body via a first pivot and used to clamp the pipe fitting in conjunction with the first clamping body, a third clamping body movably assembled on the first clamping body for using the first clamping body to pull the clamped pipe fitting out of the main body, a first elastic reset member disposed between the first and second clamping bodies to cause the second clamping body to reset relative to the first clamping body, and a second elastic reset member disposed between the first and third clamping bodies to cause the third clamping body to reset relative to the first clamping body. The third clamping body is movably assembled on the first clamping body by screws. In use, the first and second clamping bodies clamp the pipe fitting by opening and closing their jaws. Then, the jaws of the third clamping body abut against the outer wall of the main body, and the third clamping body is pried along the axial direction of the first pivot to move the main body and the pipe fitting relative to each other, thereby pulling out the pipe fitting.

[0003] However, the inventors discovered during implementation that, when operating the above-mentioned pipe puller, since the opening and closing directions of the first and second clamps are not in the same plane as the prying direction of the third clamp, it is inconvenient to apply force when operating the pipe puller with one hand, making it inconvenient to use. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a pipe puller that is more convenient to use and operate.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pipe puller, comprising a first clamp body, a second clamp body whose front end is pivotally connected to the first clamp body via a first rotating shaft and used to cooperate with the first clamp body to clamp a pipe fitting, a third clamp body movably assembled on the first clamp body for cooperating with the first clamp body to pull the clamped pipe fitting out of the main body, a first elastic reset member disposed between the first clamp body and the second clamp body for causing the second clamp body to reset relative to the first clamp body, and a second elastic reset member disposed between the first clamp body and the third clamp body for causing the third clamp body to reset relative to the first clamp body. The front end of the first clamp body is provided with a fixing block, and the second clamp body includes a clamp pivotally connected to the first clamp body via the first rotating shaft and whose front end is offset from the first clamp body. The first clamp has an operating handle with a pushing part at the position of a rotating shaft and a movable clamping block that is directionally slidably assembled on the first clamp body and abuts against the pushing part at one end away from the fixed clamping block. The first elastic reset member includes a first reset spring provided on the first clamp body to promote the movable clamping block away from the fixed clamping block. The third clamp body is pivotally connected to the first clamp body by a second rotating shaft and has an abutting joint at the front end of the third clamp body for abutting against the outer wall of the main body. The movable clamping block is pushed by the pushing part of the operating handle of the second clamp body, so that the movable clamping block cooperates with the fixed clamping block to clamp the pipe. The pipe, which is clamped by the first clamp body and the second clamp body, is pulled out of the main body by the first clamp body when the first clamp body rotates relative to the third clamp body.

[0006] Furthermore, the front end of the first clamp body is provided with a long, narrow groove, and the movable clamping block is slidably assembled in the groove.

[0007] Furthermore, the movable clamping block is a strip-shaped block. One end of the strip-shaped block near the fixed clamping block is provided with a clamping protrusion that cooperates with the fixed clamping block, and the other end away from the fixed clamping block is provided with an abutment block for abutting the pushing part. The strip-shaped block is also provided with a strip-shaped hole extending along the length direction. A convex shaft is provided in the slide groove, passing through the strip-shaped hole to guide the strip-shaped block to slide in the slide groove. The top end of the convex shaft is provided with a stop part to prevent the strip-shaped block from falling off the convex shaft. The opposite ends of the first return spring abut against the convex shaft and the abutment block, respectively.

[0008] Furthermore, the first clamp body is provided with a limiting protrusion on the side of the pushing part away from the movable clamp block, for abutting against the pushing part to limit the rotation stroke of the operating handle of the second clamp body.

[0009] Furthermore, the first clamp body is also equipped with a cover plate for covering the slide groove, the movable clamping block, the first reset spring, and the front end of the third clamp body.

[0010] Furthermore, the first clamp and the second clamp have positioning protrusions on their opposite sides, and the first elastic reset member also includes a second reset spring with its opposite ends respectively sleeved on the positioning protrusions of the first clamp and the second clamp; the second elastic reset member is a reset torsion spring sleeved on the second rotating shaft and with its two torsion arms respectively abutting against the third clamp and the first clamp.

[0011] Furthermore, the first clamp and the third clamp have positioning protrusions on their opposite sides, and the second elastic reset member is a second reset spring with its opposite ends respectively sleeved on the positioning protrusions of the first clamp and the third clamp.

[0012] Furthermore, the first rotating shaft and the second rotating shaft are either separately configured or coaxially integrated.

[0013] Furthermore, the operating handles of the first clamp body and the third clamp body are symmetrically arranged, and protective sleeves are provided on the operating handles of both; or, the operating handles of the first clamp body and the second clamp body are symmetrically arranged, and protective sleeves are provided on the operating handles of both.

[0014] Furthermore, the first clamp body has a first jaw protruding from its front end, the fixed clamping block is located at the end of the first jaw, the movable clamping block is slidably assembled on the first jaw, the abutment is a second jaw arranged side by side with the first jaw, the end of the second jaw is provided with a stop block, the second jaw is also provided with a prepositioning block that cooperates with the stop block to clamp the pipe fitting, and a long slot extending a predetermined length along the length direction of the second jaw, and the tail end of the adjusting knob passes through the long slot and the prepositioning block in sequence to cooperate with the locking fastener to adjustably fix the prepositioning block on the second jaw.

[0015] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: The present utility model embodiment has a fixed clamping block at the front end of the first clamp body, and the second clamp body includes an operating handle and a movable clamping block slidably assembled on the first clamp body. In specific operation, the user can place the pipe inserted into the main body between the fixed clamping block and the movable clamping block. Then, by rotating the operating handle of the second clamp body, the pushing part at the front end of the operating handle pushes the movable clamping block towards the fixed clamping block, so that the movable clamping block and the fixed clamping block cooperate to clamp the pipe. Since the third clamp body is pivotally connected to the first clamp body by the second rotating shaft, the user can rotate the third clamp body so that the abutting part at the front end of the third clamp body abuts against the outer wall of the main body and applies further force. The third clamp body and the first clamp body open relative to each other, pushing against the main body and thus pulling the pipe out of the main body. In the overall operation process, the first clamp body, the second clamp body and the third clamp body all rotate in the same plane, which makes it more convenient for the user to apply force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the disassembled structure of an optional embodiment of the pipe-pulling forceps of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of an optional embodiment of the pipe puller of this utility model after the cover plate is removed.

[0018] Figure 3 This is a schematic diagram of an optional embodiment of the pipe puller of this utility model, showing its structure in conjunction with the pipe fitting and the main body.

[0019] Figure 4 This is a schematic diagram showing the disassembled structure of another optional embodiment of the pipe-pulling forceps of this utility model.

[0020] Figure 5 This is a schematic diagram of the structure after the cover plate is removed in another optional embodiment of the pipe puller of this utility model.

[0021] Figure 6 This is a schematic diagram of another optional embodiment of the pipe puller of this utility model, showing its structure in conjunction with the pipe fitting and the main body.

[0022] Figure 7 This is a structural schematic diagram from another perspective of another optional embodiment of the pipe-pulling forceps of this utility model. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0024] like Figures 1-7As shown, an optional embodiment of this utility model provides a pipe puller, including a first clamp body 1, a second clamp body 3 whose front end is pivotally connected to the first clamp body 1 via a first rotating shaft 30 and used to clamp a pipe A in cooperation with the first clamp body 1, a third clamp body 5 movably assembled on the first clamp body 1 for cooperating with the first clamp body 1 to pull the clamped pipe A out of the main body B, a first elastic reset member 7 disposed between the first clamp body 1 and the second clamp body 3 for causing the second clamp body 3 to reset relative to the first clamp body 1, and a second elastic reset member 9 disposed between the first clamp body 1 and the third clamp body 5 for causing the third clamp body 5 to reset relative to the first clamp body 1. The front end of the first clamp body 1 is provided with a fixing block 10, and the second clamp body 3 includes a pushing part 321 pivotally connected to the first clamp body 1 via the first rotating shaft 30 and whose front end is offset from the first rotating shaft 30. The operating handle 32 and the movable clamping block 34 are slidably assembled on the first clamping body 1 and abut against the pushing part 321 at one end away from the fixed clamping block 10. The first elastic reset member 7 includes a first reset spring 70 provided on the first clamping body 1 to push the movable clamping block 34 away from the fixed clamping block 10. The third clamping body 5 is pivotally connected to the first clamping body 1 by a second rotating shaft 50 and the front end of the third clamping body 5 is provided with an abutting part 52 for abutting against the outer wall of the main body B. The movable clamping block 34 is pushed by the pushing part 321 on the operating handle 32 of the second clamping body 3, so that the movable clamping block 34 cooperates with the fixed clamping block 10 to clamp the pipe A. The pipe A, which is clamped by the first clamping body 1 and the second clamping body 3, is pulled out from the main body B by the first clamping body 1 when the first clamping body 1 rotates relative to the third clamping body 5.

[0025] This embodiment of the invention features a fixed clamping block 10 at the front end of the first clamping body 1, and a second clamping body 3 including an operating handle 32 and a movable clamping block 34 slidably assembled on the first clamping body 1. In operation, the user places a pipe A, inserted into the main body B, between the fixed clamping block 10 and the movable clamping block 34. Then, by rotating the operating handle 32 of the second clamping body 3, the pushing part 321 at the front end of the operating handle 32 pushes the movable clamping block 34 towards the fixed clamping block 10, thereby causing the movable clamping block 34 to engage with the fixed clamping block 10. The fixed clamping block 10 clamps the pipe fitting A. Since the third clamping body 5 is pivotally connected to the first clamping body 1 via the second rotating shaft 50, the user rotates the third clamping body 5 so that the abutment 52 at the front end of the third clamping body 5 abuts against the outer wall of the main body B and applies further force. The third clamping body 5 and the first clamping body 1 open relative to each other, pushing against the main body B and thus pulling the pipe fitting A out of the main body B. During the entire operation, the first clamping body 1, the second clamping body 3 and the third clamping body 5 all rotate in the same plane, which makes it more convenient for the user to apply force.

[0026] In one optional embodiment of this utility model, such as Figures 1-7 As shown, the front end of the first clamp body 1 is provided with a long, narrow groove 12, and the movable clamping block 34 is slidably assembled within the groove 12. In this embodiment, the groove 12 is provided on the first clamp body 1. By slidably assembling the movable clamping block 34 into the groove 12, the sliding direction of the movable clamping block 34 is guided by the groove wall of the groove 12, effectively achieving directional sliding assembly.

[0027] In one optional embodiment of this utility model, such as Figures 1-7 As shown, the movable clamping block 34 is a strip-shaped block. One end of the strip-shaped block 34 near the fixed clamping block 10 is provided with a clamping protrusion 341 that cooperates with the fixed clamping block 10, and the other end away from the fixed clamping block 10 is provided with an abutment block 343 for abutting against the pushing part 321. The strip-shaped block 34 is also provided with a strip-shaped hole 345 extending along the length direction. The slide groove 12 is provided with a convex shaft 14 that passes through the strip-shaped hole 345 to guide the strip-shaped block 34 to slide in the slide groove 12. The top end of the convex shaft 14 is provided with a stop part 141 to prevent the strip-shaped block 34 from falling off the convex shaft 14. The opposite ends of the first return spring 70 abut against the convex shaft 14 and the abutment block 343, respectively. In this embodiment, the movable clamping block 34 is a strip-shaped block. A clamping protrusion 341 is provided at one end of the strip-shaped block 34, and an abutment block 343 is provided at the other end. The clamping protrusion 341 can cooperate with the fixed clamping block 10 to clamp the pipe A, while the abutment block 343 can easily abut against the pushing part 321. In addition, by providing a convex shaft 14 that passes through the strip-shaped hole 345 in the slide groove 12, and the convex shaft 14 is provided with a stop part 141, the strip-shaped block 34 can be assembled in the slide groove 12 to prevent the strip-shaped block 34 from falling out. Moreover, the first return spring 70 is provided between the convex shaft 14 and the abutment block 343 to facilitate the smooth compression and change of the first return spring 70.

[0028] In one optional embodiment of this utility model, such as Figures 1-2 , Figures 4-5 As shown, the first clamp body 1 also has a limiting protrusion 15 on the side of the pushing part 321 away from the movable clamp block 34, which abuts against the pushing part 321 to limit the rotational stroke of the operating handle 32 of the second clamp body 3. In this embodiment, by setting the limiting protrusion 15 to abut against the pushing part 321 to limit the rotational stroke of the operating handle 32 of the second clamp body 3, the operating handle 32 is prevented from turning too much under the elastic return thrust of the first return spring 70; and the first return spring 70 can be kept in a pre-compressed state.

[0029] In one optional embodiment of this utility model, such as Figures 1-7As shown, the first clamp body 1 is also equipped with a cover plate 16 for covering the slide groove 12, the movable clamping block 34, the first return spring 70, and the front end of the third clamp body 5. In this embodiment, by setting the cover plate 16, the various structural components covered by the cover plate 16 can be effectively protected, and external objects can be prevented from interfering with the movement of the various structural components. In specific implementation, the cover plate 16 is locked onto the first clamp body 1 by means of several large-head screws, and one of the large-head screws also serves as the convex shaft 14 locked in the slide groove 12, with the large head of the large-head screw serving as the stop part 141.

[0030] In one optional embodiment of this utility model, such as Figures 4-7 As shown, the first clamp body 1 and the second clamp body 3 have positioning protrusions 17 on their opposite sides. The first elastic reset member 7 also includes a second reset spring 72 with its opposite ends respectively sleeved on the positioning protrusions 17 of the first clamp body 1 and the second clamp body 3. The second elastic reset member 9 is a reset torsion spring sleeved on the second rotating shaft 50, with its two torsion arms respectively abutting against the third clamp body 3 and the first clamp body 1. In this embodiment, to prevent the elastic thrust of the first reset spring 70 from being insufficient to reset the third clamp body 5, a reset torsion spring 72 is also provided. The assembly structure is not only simple, but it can also ensure the relative reset of the third clamp body 5 and the first clamp body 1. Moreover, by using a reset torsion spring sleeved on the second rotating shaft 50 with its two torsion arms abutting against the third clamp body 3 and the first clamp body 1, the torsional elastic force of the two torsion arms of the reset torsion spring can be effectively used to achieve the automatic reset of the third clamp body 3 and the first clamp body 1.

[0031] In one optional embodiment of this utility model, such as Figures 1-3 As shown, the first clamp 1 and the third clamp 5 have positioning protrusions 17 on their opposite sides, and the second elastic reset member 9 is a second reset spring whose opposite ends are respectively sleeved on the positioning protrusions 17 of the first clamp 1 and the third clamp 3. In this embodiment, by providing positioning protrusions 17 on the opposite sides of the first clamp 1 and the second clamp 3, and by assembling the second reset spring on the positioning protrusions 17, the second reset spring can also be effectively used to cause the opened first clamp 1 and the second clamp 3 to automatically close and reset.

[0032] In an optional embodiment of this utility model, the first rotating shaft 30 and the second rotating shaft 50 are separately arranged (e.g., Figures 1-3 (as shown) or coaxial integrated setting (such as) Figures 5-7(As shown). In this embodiment, whether the first rotating shaft 30 and the second rotating shaft 50 are separately arranged or integrally formed coaxially, it can ensure that the first clamp body 1, the second clamp body 3, and the third clamp body 5 rotate in the same plane during operation, making operation more convenient. It is understood that when the first rotating shaft 30 and the second rotating shaft 50 are set separately, they should be kept parallel to each other. In specific implementation, both the first rotating shaft 30 and the second rotating shaft 50 can be assembled using large-head bolts and nuts; in addition, to simplify the structure, such as Figure 2 As shown, the limiting protrusion 15 can be directly formed by the head of a big-headed bolt.

[0033] In one optional embodiment of this utility model, such as Figures 1-3 As shown, the operating handles of the first clamp body 1 and the third clamp body 5 are symmetrically arranged, and protective sleeves 18 are fitted onto the operating handles of both; or, as... Figures 4-7 As shown, the operating handles of the first clamp body 1 and the second clamp body 3 are symmetrically arranged, and both operating handles are covered with protective sleeves 18. In this embodiment, the two clamp bodies covered with protective sleeves 18 serve as the main clamp bodies for the user to hold, while the operating handle of the other clamp body without protective sleeves 18 is usually set to be shorter so that it can be operated by the user's fingers, thus making it more convenient to operate.

[0034] In one optional embodiment of this utility model, such as Figures 1-7 As shown, the first clamp body 1 has a first clamping jaw 19 protruding from its front end. The fixed clamping block 10 is located at the end of the first clamping jaw 19. The movable clamping block 34 is slidably assembled on the first clamping jaw 19. The abutment 52 is a second clamping jaw arranged side by side with the first clamping jaw 19. The end of the second clamping jaw 52 is provided with a stop block 521. The second clamping jaw 52 is also provided with a prepositioning block 523 that cooperates with the stop block 52 to clamp the pipe fitting A and a long slot 525 extending a predetermined length along the length direction of the second clamping jaw 52. The tail end of the adjusting knob 527 passes through the long slot 525 and the prepositioning block 523 in sequence and cooperates with the locking fastener 529 to adjustably fix the prepositioning block 523 on the second clamping jaw 52. In this embodiment, during operation, the user can also adjust the distance between the prepositioning block 523 and the stop block 521 by adjusting the knob 527. The prepositioning block 523 and the stop block 521 cooperate to initially position the pipe A, allowing the pipe A to pass between the movable clamping block 34 and the fixed clamping block 10, which makes it easier for the movable clamping block 34 and the fixed clamping block 10 to clamp the pipe A subsequently. Figures 1-6 In one embodiment, the adjusting knob 527 has a threaded end at its tail end. The adjusting knob 527 passes through the elongated slot 525 and a pre-set through hole on the pre-positioning block 523 with its threaded end. The locking fastener 529 is a limiting snap ring (such as a retaining spring) that snaps onto the threaded end of the adjusting knob 527. Figures 1-7(as shown) or a locking nut.

[0035] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A pipe puller, comprising a first clamping body, a second clamping body whose front end is pivotally connected to the first clamping body via a first pivot and used to cooperate with the first clamping body to clamp a pipe fitting, a third clamping body movably assembled on the first clamping body for cooperating with the first clamping body to pull the clamped pipe fitting out of a body, a first elastic reset member disposed between the first clamping body and the second clamping body for causing the second clamping body to reset relative to the first clamping body, and a second elastic reset member disposed between the first clamping body and the third clamping body for causing the third clamping body to reset relative to the first clamping body, characterized in that, The first clamp body has a fixed clamping block at its front end. The second clamp body includes an operating handle pivotally connected to the first clamp body via the first pivot and having a pushing part at its front end offset from the first pivot, and a movable clamping block slidably assembled to the first clamp body and having one end away from the fixed clamping block abutting against the pushing part. The first elastic reset member includes a first reset spring disposed on the first clamp body to push the movable clamping block away from the fixed clamping block. The third clamp body is pivotally connected to the first clamp body via the second pivot and has an abutting joint at its front end for abutting against the outer wall of the main body. The movable clamping block is pushed by the pushing part on the operating handle of the second clamp body, so that the movable clamping block cooperates with the fixed clamping block to clamp the pipe. The pipe, clamped by the first clamp body and the second clamp body, is pulled out of the main body by the first clamp body when the first clamp body rotates relative to the third clamp body.

2. The tube-pulling wrench as described in claim 1, characterized in that, The front end of the first clamp body is provided with a long, narrow groove, and the movable clamping block is slidably assembled in the groove.

3. The tube-pulling wrench as described in claim 2, characterized in that, The movable clamping block is a strip-shaped block. One end of the strip-shaped block near the fixed clamping block has a clamping protrusion that cooperates with the fixed clamping block, and the other end away from the fixed clamping block has an abutment block for abutting the pushing part. The strip-shaped block also has a strip-shaped hole extending along its length. A convex shaft passing through the strip-shaped hole is provided in the slide groove to guide the strip-shaped block to slide in the slide groove. The top end of the convex shaft has a stop part to prevent the strip-shaped block from falling off the convex shaft. The opposite ends of the first return spring abut against the convex shaft and the abutment block, respectively.

4. The tube-pulling wrench as described in claim 1, characterized in that, The first clamp body also has a limiting protrusion on the side of the pushing part away from the movable clamp block, which abuts against the pushing part to limit the rotation stroke of the operating handle of the second clamp body.

5. The tube-pulling wrench as described in claim 3, characterized in that, The first clamp body is also equipped with a cover plate for covering the slide groove, the movable clamping block, the first reset spring and the front end of the third clamp body.

6. The tube-pulling wrench as described in claim 1, characterized in that, The first clamp and the second clamp have positioning protrusions on their opposite sides. The first elastic reset member also includes a second reset spring with its two ends respectively sleeved on the positioning protrusions of the first clamp and the second clamp. The second elastic reset member is a reset torsion spring sleeved on the second rotating shaft with two torsion arms respectively abutting against the third clamp and the first clamp.

7. The tube-pulling wrench as described in claim 1, characterized in that, The first clamp and the third clamp have positioning protrusions on their opposite sides, and the second elastic reset member is a second reset spring with its opposite ends respectively sleeved on the positioning protrusions of the first clamp and the third clamp.

8. The tube-pulling wrench as described in claim 1, characterized in that, The first rotating shaft and the second rotating shaft are either separately configured or coaxially integrated.

9. The tube-pulling wrench as described in claim 1, characterized in that, The operating handles of the first clamp body and the third clamp body are symmetrically arranged, and both operating handles are covered with protective sleeves; or, the operating handles of the first clamp body and the second clamp body are symmetrically arranged, and both operating handles are covered with protective sleeves.

10. The tube-pulling wrench as described in claim 1, characterized in that, The first clamp body has a first jaw protruding from its front end. The fixed clamping block is located at the end of the first jaw. The movable clamping block is slidably assembled on the first jaw. The abutment is a second jaw arranged side by side with the first jaw. The end of the second jaw is provided with a stop block. The second jaw is also provided with a prepositioning block that cooperates with the stop block to clamp the pipe fitting and a long slot extending a predetermined length along the length direction of the second jaw. The tail end of the adjusting knob passes through the long slot and the prepositioning block in sequence with a locking fastener to adjustably fix the prepositioning block on the second jaw.

Images