TWI742917B - Water pipe clamp structure - Google Patents

Abstract

A water pipe clamp structure includes a ratchet block, the pivot shaft of which penetrates a torsion spring; the ratchet block is located between the first clamp arm and the second clamp arm, and the pivot shaft is connected to the first clamp arm and the second clamp arm. The cross pivot point of the arm is pivoted; the first pliers arm is provided with a long opening with a ratchet segment, the ratchet block is located in the long opening, the short spring leg of the torsion spring is fixed on the ratchet block, and the long spring leg pushes against The ratchet block meshes with the ratchet tooth segment on the smooth side wall with a long opening; the ratchet block also includes an eccentric shaft penetrating in the arc-shaped hole of the second pliers arm. By pulling the second pliers arm in two stages, the arc-shaped hole can use one of its end walls to push against the eccentric shaft and then push the ratchet block, out of engagement with the ratchet segment, so that the second pliers arm can move downward. , Change the jaw size of the water pipe pliers, and provide a moderate idle stroke rotation angle, which can moderately loosen the jaws to adjust the operating posture without affecting the meshing state of the ratchet block and the ratchet segment, and improve it accordingly The traditional ratchet block easily disengages from the mesh.

Description

Water pipe clamp structure

The present invention is related to hand tools, and more specifically, is a water pipe clamp structure. The clamp body of the water pipe clamp adopts ratchet positioning. By moving one of the clamp bodies up and down, the size of the jaw can be changed. When the clamp body moves down to expand the size of the jaw, Moving one of the pliers handles of the water pipe pliers can control the clutching and disengagement of the ratchet, and provide a free-stroke rotation distance, which can open the jaws at a moderate angle without disengaging from the engaged state, thereby stably and reliably controlling the movement of the pliers body. According to adjust the size of the jaw opening.

The conventional water pipe pliers, as shown in Fig. 1 to Fig. 4, have a first pliers body 1 and a second pliers body 2 which are pivotally arranged. 5 is set in the ring groove 10 preset in the second pliers body 2, an arc hole 9 is also provided in the ring groove 10, the two spring legs of the C-shaped spring 5 pass through the arc hole 9 and resist the arc On the two ends of the hole 9, one of the spring legs is combined with a ratchet block 6, the ratchet block 6 is accommodated in the long slot 4 and rotates synchronously with the rotation of the second pliers body 2.

In operation; to adjust the size of the jaws of the water pipe tongs, it is mainly by moving the second jaw body 2 to move up or down to reduce and expand the size of the jaws. In the use of ratchet meshing mechanism, the most important key movement is to expand the jaw size downward. The above conventional mechanism only needs to rotate the second pliers body 2 to use the C-shaped spring 5 on it. , Synchronously rotate the ratchet block 6 pivoted on the second pliers body 2 to disengage it from the ratchet section 3 provided in the long groove 4 of the first pliers body 1 and move the second pliers body 2 toward Slide down until the ratchet block 6 touches the bottom end of the long groove 4. To obtain the largest jaw size.

When sliding the second pliers body 2 to adjust the jaw size, pressing the second pliers body 2 in the opposite direction will simultaneously drive the ratchet block 6 on the second pliers body 2 to engage with the long groove 4 of the first pliers body 1 The inner ratchet segment 3 is in place to fix the positions of the first pliers body 1 and the second pliers body 2 to each other for on-site operations.

There is a problem with the combination and operation of the above mechanism, which results in room for improvement in operation. The problem is that when the jaws are opened, the ratchet block 6 will follow the rotation of the second pliers body 2. "Synchronization" is driven to rotate, that is, when the rotation angle of the second pliers body 2 is equal to or greater than the mesh size of the ratchet block 6 and the ratchet segment 3, the second pliers body 2 will slip off. , This kind of over-sensitive phenomenon will cause misoperation in the actual on-site operation process.

During the operation of the pipe clamp, opening a certain angle of the jaws appropriately is not to move the second pliers body 2 to adjust the size of the jaws. Sometimes it is to loosen the clamping state of the tube and apply force. After the angle is adjusted, the clamping and rotating operation can be performed. Or; after adjusting the position of the second pliers foot 2 in the long groove 4 of the first pliers body 1, and the ratchet block 6 is also correctly engaged in the ratchet section 3 in the long groove 4, but accidentally If the second pliers body 2 is touched again, or the second pliers body 2 is not held when the water pipe pliers is held at an angle, the second pliers body 2 and the first pliers body 1 are opened at an excessively large angle, which will cause the ratchet block 6 to break away from the spine. The correct meshing state of the tooth section 3 requires the user to re-adjust the size of the water pipe jaws. This is the problem that this case intends to solve.

To solve the above problems, the present invention proposes a novel water pipe clamp structure.

Technical features of the invention:

A water pipe clamp structure includes a first clamp body, a first clamp arm, and a first clamp handle that are connected, a second clamp body, a second clamp arm, and a second clamp handle that are connected; Clamp arm Overlapping and crossing the second pliers arm, the first pliers body is opposite to the second pliers body; the first pliers arm includes a long opening with a ratchet segment; the second pliers arm is provided with an arc-shaped hole; A ratchet block is located in the long opening, and the ratchet block is pivoted to the second pliers arm with a pivoting shaft; the ratchet block is provided with a ratchet portion facing the ratchet segment; characterized in that:

The portion of the ratchet block facing the second pliers arm includes a spring foot groove and an eccentric shaft;

A torsion spring passes through the pivot shaft, a short spring leg of the torsion spring is set in the spring leg groove, and a long spring leg of the torsion spring pushes against a smooth side wall of the long opening; the torsion spring is The clamp is located between the ratchet block and the second clamp arm, and the eccentric shaft extends through the arc-shaped hole;

The elastic tension of the torsion spring normally urges the ratchet portion of the ratchet block to mesh with the ratchet segment; when engaged, the eccentric shaft of the ratchet block is located in the arc hole, but does not abut against the arc Two ends of the hole;

Pull the second pliers handle to a first angle (this angle can also be referred to as the "empty stroke angle", which means; it does not drive the ratchet block to rotate), and one end wall of the arc-shaped hole contacts the ratchet The eccentric shaft of the tooth block; continue to pull the second pliers handle to a second angle (this angle can also be referred to as the "actuation angle", which means; start to drive the ratchet block to rotate), contact the eccentric shaft The end wall pushes the ratchet block by the eccentric shaft, the ratchet part is separated from the ratchet segment, the torsion spring is compressed and stored, and automatically provides a spring-action feedback force, so that the user can learn more , Has entered the action range of pushing against the ratchet block; accordingly, the second pliers arm can smoothly move on the first pliers arm to change the relative distance between the first pliers body and the second pliers body.

Efficacy of the invention:

The normal situation is that the elastic tension of the torsion spring keeps the ratchet block engaged with the ratchet segment Therefore, the second pliers arm and the second pliers body are positioned so as to keep the jaw size of the water pipe pliers so that it can clamp the section of the water pipe or adjust the completed jaw work size.

The present invention must deliberately implement the action of pulling the second pliers handle in two stages, so that the force is greater than the reaction force of the torsion spring, so that the meshing relationship between the ratchet block and the ratchet segment can be released, so that the second pliers arm can move downward. , Changing the jaw size of the pipe clamp is different from the above-mentioned traditional design. The advantage is that when the water pipe clamp is clamped and the water pipe is rotated, or when the completed jaw size is adjusted, the second clamp handle is triggered due to a misoperation, which causes the ratchet block and the ratchet section to accidentally detach, and the water pipe clamp is removed from the water pipe The problem of loosening, or the need to re-adjust the size of the situation can be avoided.

<Preliminary Technology>

1: The first clamp body

2: The second clamp body

3: Ratchet segment

4: Long slot

5: C-type spring

6: Ratchet block

7: The second clamp handle

8: pivot

9: Arc hole

10: Ring groove

<The present invention>

20: The first clamp body

21: Long opening

22: first long side

23: Ratchet segment

24: second long side

25: The first clamp handle

40: ratchet block

41: Ratchet

42: pivot shaft

43: spring foot slot

44: eccentric shaft

45: positioning axis

26: first clamp arm

30: The second clamp body

31: Through hole

32: curved hole

33: The second clamp handle

34: second clamp arm

50: Torsion spring

51: short spring foot

52: Long spring foot

70: fixed piece

71: positioning hole

72: fixed parts

[Figure 1] The appearance of the conventional water pipe wrench.

[Figure 2] The exploded view of the conventional pipe clamp.

[Figure 3] Sectional view of the conventional water pipe clamp combination.

[Figure 4] Schematic diagram of the conventional water pipe clamp action.

[Figure 5] The appearance of the water pipe clamp of the present invention.

[Figure 6] An exploded view of the water pipe clamp of the present invention.

[Figure 7] A plan view of the water pipe clamp assembly of the present invention.

[Fig. 8] is a cross-sectional view taken along the line VIII-VIII in Fig. 7. [Fig.

[Figure 9] One of the schematic diagrams of the cross-section and action of the water pipe tongs of the present invention for opening the jaws.

[Fig. 10] The second schematic diagram of the cross-section and action diagram of the opening jaw of the water pipe wrench of the present invention.

[Figure 11] The third of the cross-section and action diagram of the opening jaw of the water pipe wrench of the present invention.

[Figure 12] A schematic view of the cross-section and action of the reduced jaw of the water pipe pliers of the present invention.

[Figure 13] Schematic diagram of the opening action of the water pipe clamp of the present invention.

[Figure 14] A schematic diagram of the action of reducing the jaws of the water pipe pliers of the present invention.

In order to facilitate the description of the central idea of the present invention expressed in the column of the above-mentioned summary of the invention, specific embodiments are used to express it. The various objects in the embodiment are drawn according to the proportion, size, deformation amount or displacement amount suitable for explanation, rather than drawn according to the proportion of the actual element, which will be described first. In the following description, the same and symmetrically arranged elements are denoted by the same numbers.

As shown in Fig. 5 to Fig. 9, the water pipe clamp structure of the present invention includes:

A first pliers body 20 and a second pliers body 30; the first pliers body 20 extends a first pliers arm 26, and the second pliers body 30 extends a second pliers arm 34; the first pliers arm 26 and the second pliers arm 34 are overlapped and crossed, and the first pliers body 20 and the second pliers body 30 are opposite. The first pliers arm 26 is provided with a long opening 21, and a first long side 22 of the long opening 21 is provided with a ratchet section 23. The first pliers arm 26 is connected to a first pliers handle 25. The second clamp arm 34 defines a through hole 31, and an arc-shaped hole 32 is formed adjacent to the through hole 31. The second pliers arm 34 is connected to a second pliers handle 33.

A ratchet block 40 is located in the long opening 21, and a ratchet portion 41 is provided opposite to the ratchet segment 23; the ratchet block 40 is also provided with a pivot shaft 42 and a side surface facing the second pliers arm 34 The spring foot groove 43, and an eccentric shaft 44. The ratchet block 40 is different from that of the second pliers arm 34 with a positioning shaft 45, and the positioning shaft 45 and the pivot shaft 42 are coaxial.

A torsion spring 50 is inserted and sleeved on the pivot shaft 42, the short spring foot 51 is fixedly positioned in the spring foot slot 43, the long spring foot 52 is pushed against a second long side 24 of the long opening 21, and the second The long side 24 is a smooth side wall. The ratchet block 40 extends through the through hole 31 through the pivot shaft 42, the torsion spring 50 is clamped between the ratchet block 40 and the second clamp arm 34, and the eccentric shaft 44 extends through the Curved hole 32 middle.

A fixing piece 70 is located on a surface of the first pliers arm 26 that is different from the second pliers arm 34, and a positioning hole 71 is provided for the positioning shaft 45 of the ratchet block 40 to penetrate. Two ends of the fixing piece 70 and the second clamp arm 34 are respectively combined with two fixing pieces 72 (rivets). According to the above-mentioned structure, the first pliers arm 26 and the second pliers arm 34 are pivotally connected in an overlapping, cross-moving manner, and the first pliers body 20 and the second pliers body 30 are opposed to each other.

As shown in Figure 9, under normal conditions, the elastic tension of the torsion spring 50 urges the ratchet portion 41 of the ratchet block 40 to mesh with the ratchet segment 23. Through the conventional technology of tooth shape and the elastic movement space of the ratchet block 40, the The ratchet block 40 can move forward but cannot move backward. The definition of forward movement is that the ratchet teeth can slide against each other, so that the ratchet block 40 can move along the ratchet segment 23, and the displacement of the second pliers arm 34 pushes the second pliers body 30 toward the direction of the first pliers body 20 , Thereby reducing the size of the jaws. Conversely, when the ratchet tooth portion 41 and the ratchet tooth segment 23 are engaged, the opposite direction to the above causes the ratchet tooth portion 41 and the ratchet tooth segment 23 to lock each other, thereby maintaining the size of the positioning jaw. Specifically, when the ratchet portion 41 is engaged with the ratchet segment 23, the eccentric shaft 44 of the ratchet block 40 is located in the arc hole 32, but does not lean against any end wall of the arc hole 32 .

As shown in Fig. 10, Fig. 11, and Fig. 13, to open the jaws, the second pliers body 30 must be moved in a direction away from the first pliers body 20. The operation mode is divided into two stages. The first stage is to pull the second pliers handle 33 outwards (in the direction away from the first pliers handle 25) to a first angle (this angle can also be referred to as the "empty stroke angle", The meaning represented; does not drive the ratchet block to rotate), so that the second clamp arm 34 is rotated at an angle with the pivot shaft 42 as the center, and one end wall of the arc-shaped hole 32 contacts the ratchet block For the eccentric shaft 44 of 40, the first stage of action will not compress the torsion spring 50, so there is no resistance when the second pliers handle 33 is pulled, and when the end wall of the arc-shaped hole 32 touches the thorn When the eccentric shaft 44 of the tooth block 40 is eccentric, the operator will feel a sense of frustration in the second pliers handle 33. Then, continue to the second Pull the second pliers handle 33 at a second angle (this angle can also be referred to as the "actuation angle", which means; start to drive the ratchet block to rotate), and apply a reaction force greater than the torsion spring 50. The arc hole 32 pushes against the eccentric shaft 44 with the end wall to drive the ratchet block 40 to rotate at an angle with the central shaft 61 as the center. The torsion spring 50 is compressed and stored and automatically provides a spring-acting feedback force. , Allowing the user to clearly know that the ratchet block has entered the action range of pushing against the ratchet block, the ratchet portion 41 is separated from the ratchet segment 23; the second stage of action is due to the rotation of the ratchet block 40 to compress the torsion spring 50 Therefore, when the second pliers handle 33 is pulled, the reaction resistance of the torsion spring 50 is felt, so the amount of pulling force applied must be slightly larger than that of the first stage. When the ratchet portion 41 is separated from the ratchet segment 23, the second pliers arm 34 can move, so that the second pliers body 30 smoothly moves away from the first pliers body 20, thereby expanding the jaws.

As shown in Figures 12 and 14, the operation of reducing the jaws is to move the second pliers arm 34 when the ratchet portion 41 and the ratchet segment 23 are engaged, so that the second pliers body 30 moves toward the first pliers The body 20 moves in the direction. Through the aforementioned tooth-shaped conventional technology, the ratchet teeth can slide against each other, so that the ratchet block 40 can move along the ratchet segment 23 and emit the ratchet snapping sound of "answer, answer". The second pliers body 30 moves in the direction of the first pliers body 20 in a sudden frustration, thereby reducing the size of the jaws.

According to the above structure, by moving the second clamp arm 34 and the second clamp body 30, the jaw size of the water pipe clamp can be adjusted to adapt to water pipes of different pipe diameters. Without pulling the second pliers handle 33 into a second angle (actuation angle), the torsion spring 50 normally makes the ratchet block 40 mesh with the ratchet segment 23, so as to position the second pliers The arm 34 and the second pliers body 30 do not move, keeping the jaw size of the water pipe pliers so that it can clamp the water pipe stably, or within the range of the first angle (empty stroke angle), the jaws can be loosened moderately, Under the working posture of the user, the engagement state of the water pipe clamp will not be disengaged, and the first pliers body 20 and the second pliers body 30 will slip off each other, which will affect the work.

To release the meshing relationship between the ratchet block 40 and the ratchet segment 23 and change the size of the jaws, it is necessary to deliberately implement the action of pulling the second pliers handle 33 in the aforementioned two stages. However, when the water pipe clamp is clamped and the water pipe is rotated, or when the size of the water pipe clamp is adjusted, the action of pulling the second clamp handle 33 in two stages will never happen accidentally or inadvertently, so the ratchet block 40 and the ratchet The tooth segment 23 will not be detached unexpectedly, and the second pliers body 30 and the second pliers arm 34 will not be accidentally loosened, thereby improving the above-mentioned traditional design problems.

21: Long opening

22: first long side

23: Ratchet segment

24: second long side

25: The first clamp handle

26: first clamp arm

30: The second clamp body

31: Through hole

32: curved hole

33: The second clamp handle

34: second clamp arm

40: ratchet block

41: Ratchet

42: pivot shaft

43: spring foot slot

44: eccentric shaft

45: positioning axis

50: Torsion spring

51: short spring foot

52: Long spring foot

70: fixed piece

71: positioning hole

72: fixed parts

Claims (1)

A water pipe clamp structure includes a first clamp body, a first clamp arm, and a first clamp handle that are connected, a second clamp body, a second clamp arm, and a second clamp handle that are connected; The pliers arm and the second pliers arm overlap, the first pliers body and the second pliers body are opposite; the first pliers arm includes a long opening with a ratchet segment; the second pliers arm is provided with an arc Hole; a ratchet block, located in the long opening, the ratchet block with a pivot shaft pivoting the second pliers arm; the ratchet block opposite the ratchet section is provided with a ratchet part; Its characteristics are: The portion of the ratchet block facing the second pliers arm includes a spring foot groove and an eccentric shaft; A torsion spring passes through the pivot shaft, a short spring leg of the torsion spring is set in the spring leg groove, and a long spring leg of the torsion spring pushes against a smooth side wall of the long opening; the torsion spring is The clamp is located between the ratchet block and the second clamp arm, and the eccentric shaft extends through the arc-shaped hole; The elastic tension of the torsion spring normally urges the ratchet portion of the ratchet block to mesh with the ratchet segment; when engaged, the eccentric shaft of the ratchet block is located in the arc hole, but does not abut the arc Two ends of the hole; Pull the second pliers handle to a first angle, one end of the arc-shaped hole contacts the eccentric shaft of the ratchet block; continue to pull the second pliers handle to a second angle to contact the end of the eccentric shaft The wall pushes the ratchet block by the eccentric shaft, the ratchet part is separated from the ratchet segment, and the torsion spring is compressed and stored; accordingly, the second pliers arm can move smoothly on the first pliers arm , Change the relative distance between the first pliers body and the second pliers body.

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