Water pump clamp jaw adjusting mechanism and water pump clamp

Abstract

According to the jaw adjusting mechanism of the water pump pliers and the water pump pliers, the width of a sliding block is reduced, meanwhile, a supporting body and an elastic body are arranged on the same side of the sliding block, and the supporting body and the elastic body are arranged at the two ends of the sliding block and the two sides of a pivot respectively, so that one end of a movable ratchet of the sliding block can swing around the supporting body by pulling the pivot in the radial direction of a long hole; and then the sliding block can be dragged to quickly move towards the rear end of the guide body by dragging the pivot through lateral force, so that the structure of the jaw adjusting mechanism and the jaw adjusting operation process are simplified, the jaw adjusting speed is increased, and meanwhile, the production cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping tools, and in particular relates to a water pump pliers jaw adjustment mechanism and water pump pliers. Background Art

[0002] Water pump pliers are a common clamping tool for clamping pipe-like workpieces. They have good applicability because their jaw size can be adjusted. The jaw adjustment of water pump pliers mainly relies on a slider with a movable ratchet (also called "ratchet" in some background technologies) and an adjustment mechanism composed of a long hole with a fixed ratchet set on a fixed pliers body. The adjustment mechanism can quickly reduce the jaw of the water pump pliers, but the operation is more complicated when the jaw is expanded. For example, the "self-adjusting water pump pliers" disclosed in the utility model patent with patent number ZL201410767671.0 has a handle set at the end of the slider away from the spring, and an unlocking pin corresponding to the handle is set on the movable pliers body. When the jaw needs to be expanded, the movable pliers body needs to be rotated to open the jaw to a certain angle, and the unlocking pin is used to press the handle to make the end of the slider with the ratchet set tilted, thereby separating the ratchet on the slider and the ratchet on the fixed pliers handle, and then maintain this jaw opening, pull the movable pliers body to make the slider slide along the long hole, so that the jaw of the water pump pliers is expanded.

[0003] However, this adjustment structure has a series of defects such as complex structure, difficult assembly, and the need to press the unlocking pin to insert it into the long hole during use, which makes operation difficult. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a water pump pliers jaw adjustment mechanism to solve the technical problems of complex structure and inconvenient operation of the traditional water pump pliers jaw adjustment mechanism.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a water pump pliers jaw adjustment mechanism, comprising a guide body located on the fixed pliers body of the water pump pliers and a slider connected to the movable pliers body, the front end of the guide body is used to connect the fixed jaw of the fixed pliers body, and the rear end is used to connect the fixed pliers handle of the fixed pliers body, and a pivot is connected to the slider, and the pivot is used to hinge the movable pliers body. The guide body is provided with a long hole, and the long hole extends from the front end to the rear end of the guide body. The slider is embedded in the long hole and slides along the long diameter direction of the long hole to drive the movable jaw of the movable pliers body away from or close to the fixed jaw, and a large number of wedge-shaped grooves are provided on an inner side wall extending along the long diameter direction of the long hole, and the wedge-shaped grooves are arranged in sequence in the long diameter direction of the long hole, and fixed ratchet teeth of the same shape are formed between adjacent wedge-shaped grooves, and the top of the fixed ratchet teeth is flush with the inner wall of the long hole with the wedge-shaped grooves; the slider is provided with at least one The movable ratchet cooperates with the fixed ratchet, and each movable ratchet is located at one end of the slider. An elastic body is provided on the side of the slider facing away from the fixed ratchet. The elastic body and the movable ratchet are located at the same end of the slider. One end of the elastic body is connected to the slider, and the other end slides and abuts against the inner wall of the opposite long hole; the fixed ratchet and the movable ratchet cooperate so that the slider can only approach the front end of the guide body in one direction when it is only subjected to the force in the direction of the major diameter of the long hole; the sum of the width of the slider and the height of the movable ratchet along the minor diameter direction of the long hole is less than the minor diameter of the long hole, and a supporting body is also provided on the side of the slider facing away from the fixed ratchet. The supporting body protrudes outside the slider along the minor diameter direction of the long hole, and the height of the supporting body is less than the difference between the minor diameter of the long hole and the width of the slider. The supporting body and the elastic body are respectively arranged at both ends of the slider, and the inner wall of the long hole abutted by the elastic body is parallel and opposite to the inner wall of the long hole with a wedge-shaped groove. The pivot is arranged in the middle part of the slider along the axial direction of the long hole, and the supporting body and the elastic body are respectively arranged on both sides of the pivot.

[0006] As a preferred solution, the support body and the slider are integrally formed, and the top of the support body is a convex arc-shaped curved surface.

[0007] As a preferred embodiment, the support body is a roller shaft, and a round-bottomed U-shaped groove for embedding the roller shaft is provided on the side of the slider facing away from the fixed ratchet. The roller shaft is partially embedded in the round-bottomed U-shaped groove and partially exposed outside the slider. The roller shaft is slidingly matched with the inner wall of the round-bottomed U-shaped groove or the two ends of the roller shaft are rotatably connected to the two end walls of the round-bottomed U-shaped groove through end shafts.

[0008] As a preferred solution, the support body is a plurality of balls arranged in sequence along the axial direction of the long hole, and the balls are partially slidably embedded in the slider.

[0009] As a preferred solution, the elastomer is a pre-compressed spring, and a spring blind hole extending along the width direction of the slider is opened on the side of the slider facing away from the fixed ratchet. The spring blind hole and the movable ratchet are located at the same end of the slider, and the spring is inserted in the spring blind hole. One end of the spring extends out of the spring blind hole and slides against the inner wall of the opposite long hole.

[0010] As a preferred embodiment, the elastic body is a pre-compressed round-bottomed "V"-shaped reed, and a round-bottomed "V"-shaped groove is provided on the side of the slider facing away from the fixed ratchet. The "V"-shaped groove is closed at both axial ends, and the "V"-shaped groove and the movable ratchet are located at the same end of the slider. The bottom of the reed is embedded in the "V"-shaped groove, and the two top parts of the reed extend out of the "V"-shaped groove and slide in contact with the inner wall of the opposite long hole. The bottom angle of the "V"-shaped groove is greater than the bottom angle of the reed.

[0011] The utility model further aims to solve the technical problem of providing a water pump pliers to solve the technical problem of inconvenient jaw adjustment operation of traditional water pump pliers.

[0012] In order to solve the above technical problems, the technical solution adopted by the utility model is: a water pump pliers, comprising a fixed pliers body and a movable pliers body, characterized in that it also includes the above-mentioned water pump pliers jaw adjustment mechanism, the fixed jaw of the fixed pliers body is connected to the front end of the guide body of the water pump pliers jaw adjustment mechanism, the fixed pliers handle of the fixed pliers body is connected to the rear end of the guide body, the two ends of the pivot respectively extend out of the slider, the movable pliers body comprises a movable jaw, a pivot part and a movable pliers handle connected in sequence, the pivot part is provided with an assembly hole for the guide body to pass through, the guide body is inserted into the assembly hole, the slider is opposite to the pivot parts on both sides of the assembly hole and is rotatably connected to the pivot part through a pivot, the movable jaw is opposite to the fixed jaw, the assembly hole satisfies the guide body to swing around the pivot inside it, and the wedge-shaped groove is arranged on the inner wall of one side of the long hole close to the water pump pliers jaw.

[0013] The beneficial effects of the utility model are as follows: the utility model reduces the width of the slider, and simultaneously arranges a support body and an elastic body on the same side of the slider, and the support body and the elastic body are arranged at both ends of the slider and on both sides of the pivot, so that by pulling the pivot along the radial direction of the long hole, one end of the movable ratchet of the slider can swing around the support body and then disengage from the fixed ratchet, and then the pivot can be pulled by lateral force to pull the slider to move quickly toward the rear end of the guide body, thereby simplifying the structure of the jaw adjustment mechanism and the operating process of the jaw adjustment, improving the jaw adjustment speed, and at the same time reducing the production cost.

[0014] The setting of the support body and the relative positions of the support body, the elastic body and the pivot are crucial. The support body can reduce the swing range of the slider away from the fixed ratchet end, thereby improving the stability of the pivot and improving the movement of the pivot in the long hole along the short diameter direction, thereby reducing the lateral misalignment between the movable jaw and the fixed jaw of the water pump pliers, and improving the clamping accuracy and stability of the water pump pliers when clamping pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1is a structural schematic diagram of the jaw adjustment mechanism described in Example 1;

[0017] Figure 2 yes Figure 1 An enlarged view of part A is shown;

[0018] Figure 3 is another specific structural schematic diagram of the elastomer described in Example 1;

[0019] Figure 4 is another specific structural schematic diagram of the support body described in Example 1;

[0020] Figure 5 is a three-dimensional structural exploded diagram of the water pump pliers described in Example 2;

[0021] Figure 6 It is a schematic diagram of the connection structure of the movable pliers body and the fixed pliers body and the water pump pliers jaw adjustment mechanism in a half-cut state;

[0022] Figure 1 to Figure 6 In: 1. Guide body; 2. Slider; 3. Pivot; 4. Long hole; 5. Wedge-shaped groove; 6. Fixed ratchet; 7. Movable ratchet; 8. Elastic body; 9. Support body; 9a. End shaft; 10. Round bottom U-shaped groove; 11. Spring blind hole; 12. "V"-shaped groove; 13. Nut; 100. Fixed pliers body; 101. Fixed jaw; 102. Fixed pliers handle; 200. Movable pliers body; 201. Movable jaw; 202. Pivot joint; 203. Movable pliers handle; 204. Assembly hole; 300. Water pump pliers jaw adjustment mechanism. DETAILED DESCRIPTION

[0023] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings. Example 1

[0024] like Figure 1 and Figure 2 The water pump pliers jaw adjustment mechanism shown comprises a guide body 1 located on the fixed pliers body of the water pump pliers and a slider 2 connected to the movable pliers body, the front end of the guide body 1 is used to connect the fixed jaw 101 of the fixed pliers body, and the rear end is used to connect the fixed pliers handle 102 of the fixed pliers body, the slider 2 is connected with a pivot 3, the pivot 3 is used to hinge the movable pliers body, the guide body 1 is provided with a long hole 4, the long hole 4 extends from the front end to the rear end of the guide body 1, the slider 2 is embedded in the long hole 4 and slides along the long diameter direction of the long hole 4, driving the movable jaw of the movable pliers body away from or close to the fixed jaw, a large number of wedge-shaped grooves 5 are provided on an inner side wall extending along the long diameter direction of the long hole 4, the wedge-shaped grooves 5 are arranged in sequence along the long diameter direction of the long hole 4, and fixed ratchet teeth 6 of the same shape are formed between adjacent wedge-shaped grooves 5, and the top of the fixed ratchet teeth 6 is flush with the inner wall of the long hole 4 in which the wedge-shaped grooves 5 are provided.

[0025] In this embodiment, the wedge-shaped groove 5 is arranged on the inner wall of one side of the long hole 5 close to the water pump pliers jaws. The fixed ratchet 6 and the movable ratchet 7 cooperate to make the slider 2 approach the front end of the guide body 1 in only one direction when it is only subjected to the force in the long diameter direction of the long hole 4.

[0026] The slider 2 is provided with two movable ratchet teeth 7 cooperating with the fixed ratchet teeth 6 on one side thereof facing the fixed ratchet teeth 6, and each movable ratchet teeth 7 is located at the same end of the slider 2. The slider 2 is provided with an elastomer 8 on the side thereof facing away from the fixed ratchet teeth 6, and the elastomer 8 and the movable ratchet teeth 7 are located at the same end of the slider 2. One end of the elastomer 8 is connected to the slider, and the other end is in sliding contact with the inner wall of the opposite long hole 4.

[0027] like Figure 2 As shown, the elastomer 8 in this embodiment is a pre-compressed spring, and a spring blind hole 11 extending along the width direction of the slider 2 is opened on the side of the slider 2 facing away from the fixed ratchet 6. The spring blind hole 11 and the movable ratchet 7 are located at the same end of the slider 2. The spring is inserted into the spring blind hole 11, and one end of the spring extends out of the spring blind hole 11 and slides against the inner wall of the opposite long hole 4.

[0028] Using a spring as the elastic body 8 has the advantage of high assembly stability, and most of the spring is inserted into the spring blind hole 11, so the problem of the spring falling off will not occur.

[0029] like Figure 3 As shown, in actual application, the elastic body 8 can also adopt a pre-compressed round-bottom "V"-shaped spring leaf, and a round-bottom "V"-shaped embedding groove 12 is opened on the side of the slider 2 facing away from the fixed ratchet 6. The "V"-shaped embedding groove 12 is closed at both axial ends, and the "V"-shaped embedding groove 12 and the movable ratchet 7 are located at the same end of the slider 2. The bottom of the spring leaf is embedded in the "V"-shaped embedding groove 12, and the two top parts of the spring leaf extend out of the "V"-shaped embedding groove 12 and slide against the inner wall of the opposite long hole 4. The bottom angle α of the "V"-shaped embedding groove 12 is greater than the bottom angle β of the spring leaf.

[0030] use Figure 3 The spring shown serves as an elastic body 8 and cooperates with a "V"-shaped groove 12 whose bottom angle α is greater than the bottom angle β of the spring. First, it can increase the contact area between the elastic body 8 and the inner wall of the long hole 4, thereby reducing the pressure per unit area and facilitating the sliding of the elastic body 8. At the same time, it can also keep the two tops of the elastic body 8 against the inner wall of the long hole 4 during the swinging of the slider 2.

[0031] In this embodiment, the sum of the width of the slider 2 and the height of the movable ratchet 7 along the short diameter direction of the long hole 4 is less than the short diameter of the long hole 4, so as to ensure that the movable ratchet 7 can completely detach from the fixed ratchet 6. A support body 9 is also provided on the side of the slider 2 facing away from the fixed ratchet 6. The support body 9 protrudes from the slider 2 along the short diameter direction of the long hole 4. The height of the support body 9 is less than the difference between the short diameter of the long hole 4 and the width of the slider 2. The support body 9 and the elastic body 8 are respectively arranged at both ends of the slider 2. The inner wall of the long hole 4 abutted by the elastic body 8 is parallel to the inner wall of the long hole 4 with the wedge-shaped groove 5. The pivot 3 is arranged in the middle of the slider 2 along the axial direction of the long hole 4. The support body 9 and the elastic body 8 are respectively arranged on both sides of the pivot 3.

[0032] The setting of the support body 9 effectively reduces the swing range of the slider 2 away from the end of the movable ratchet, thereby further limiting the movement of the pivot 3 in the long hole 4 along the minor diameter direction, and improving the clamping accuracy and clamping stability of the water pump pliers. At the same time, the support body 9 cooperates with the slider 2 with a smaller width, so that the pivot 3 can drive the movable ratchet 6 of the slider 2 to swing away from the fixed ratchet 5 when it is pushed away from the fixed ratchet 5, without the need to set up other components to drive the slider 2 to swing, which can effectively simplify the jaw adjustment mechanism, reduce production costs, and improve operational convenience.

[0033] The support body 9 described in this embodiment is preferably integrally formed with the slider 2 , and the top of the support body 9 is a convex arc-shaped curved surface to ensure that the swing of the slider 2 does not affect the support body 9 and the inner wall of the long hole 4 to maintain a stable sliding contact relationship.

[0034] Of course, in practical applications, the structure of the support body 9 can be varied.

[0035] like Figure 4 The figure shows another structure of the support body 9, which is a roller shaft. The slider 2 is provided with a round bottom U-shaped groove 10 for embedding the roller shaft on the side facing away from the fixed ratchet 6, and the two ends of the round bottom U-shaped groove 10 are closed. The roller shaft is partially embedded in the round bottom U-shaped groove 10 and partially exposed outside the slider 2. The roller shaft and the inner wall of the round bottom U-shaped groove 10 are rotatably connected with the two end walls of the round bottom U-shaped groove 10 through the end shafts 9a at both ends of the roller shaft.

[0036] Using a roller as the support body 9 can change the sliding contact between the support body 9 and the inner wall of the long hole 4 to a rolling contact, and using the end shaft 9a to rotate and connect the roller is also to further reduce the rotation resistance of the roller. In practical applications, the roller can also be directly slidably fitted in the round bottom U-shaped groove 10, and can also be further lubricated by grease.

[0037] Similar to the roller, a plurality of balls may be used as the support body 9 , wherein the plurality of balls are discretely arranged in sequence along the axial direction of the long hole 4 , and the balls are partially slidably embedded in the slider 2 .

[0038] The working process of this utility model is: Figure 1 and Figure 2 As shown, when the user needs to enlarge the jaws of the water pump pliers, the user applies a thrust in the direction F to the pivot 3. Under the action of the thrust, the slider 2 first moves as a whole following the pivot in the direction away from the fixed ratchet 6, and then the support body 9 first contacts the inner wall of the long hole 4 opposite to the fixed ratchet 6 to form a support. When the pivot 3 continues to move in the original direction, the slider 2 is located at one end of the movable ratchet 7 and swings. Since the distance between the movable ratchet 7 and the support body 9 is greater than the distance between the pivot 3 and the support body 9, the swinging speed of the movable ratchet 7 is greater than the moving speed of the pivot 3, thereby allowing the movable ratchet 7 to quickly disengage from the fixed ratchet 6.

[0039] After the movable ratchet 7 is separated from the fixed ratchet 6, one state is that the support body 9 and the elastic body 8 are against the inner wall of the long hole 4, and the other state is that the end of the slider 2 away from the support body 9 is also against the inner wall of the long hole 4. These two states depend on the size of the force applied to the pivot 3 by the user.

[0040] After the movable ratchet 7 is separated from the fixed ratchet 6, the user pushes the guide body 1 to move toward the front end along the long diameter direction of the long hole 4 while maintaining the force in the F direction, so that the slider 2 slides toward the rear end of the guide body 1 and the jaws of the water pump pliers are enlarged. The user can also pull the pivot 3 to move toward the rear end along the long diameter direction of the long hole 4 while maintaining the force in the F direction, so that the slider 2 slides toward the rear end of the guide body 1 and the jaws of the water pump pliers are enlarged.

[0041] It can be seen that the water pump pliers jaw adjustment mechanism described in this embodiment 1 is simpler in structure and more convenient to operate than the prior art. Example 2

[0042] like Figure 5 and Figure 6 The present invention shows a water pump pliers, comprising a fixed pliers body 100 and a movable pliers body 200, and also comprising the water pump pliers jaw adjustment mechanism 300 described in the above-mentioned embodiment 1, wherein the fixed jaw 101 of the fixed pliers body 100 is connected to the front end of the guide body 1 of the water pump pliers jaw adjustment mechanism 300, and the fixed pliers handle 102 of the fixed pliers body 100 is connected to the rear end of the guide body 1, and the two ends of the pivot 3 extend out of the slider 2 respectively, and the movable pliers body 200 comprises a movable jaw 201, a pivot part 202 and a movable jaw 203 connected in sequence. 02 and a movable pliers handle 203, the pivotal portion 202 is provided with an assembly hole 204 for the guide body 1 to pass through, the guide body 1 is inserted into the assembly hole 204, the slider 2 is opposite to the pivotal portions 202 on both sides of the assembly hole 204 and is rotatably connected to the pivotal portions 202 through the pivot 3, the movable jaw 201 is opposite to the fixed jaw 101, the assembly hole 204 satisfies the guide body 1 to swing around the pivot 3 therein, the wedge-shaped groove 5 is arranged on the inner wall of one side of the long hole 4 close to the jaws of the water pump pliers.

[0043] In this embodiment, the pivot 3 is a screw, and the pivot 3 passes through the pivot portion 202 and is locked by a nut 13 .

[0044] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A water pump pliers jaw adjustment mechanism, comprising a guide body (1) located on a fixed pliers body of the water pump pliers and a slider (2) connected to a movable pliers body, the front end of the guide body (1) being used to connect a fixed jaw of the fixed pliers body, and the rear end being used to connect a fixed pliers handle of the fixed pliers body, the slider (2) being connected to a pivot (3), the pivot (3) being used to hinge the movable pliers body, the guide body (1) being provided with a long hole (4), the long hole (4) extending from the front end to the rear end of the guide body (1), the slider (2) being embedded in the long hole (4) and sliding along the long diameter direction of the long hole (4), driving the movable jaw of the movable pliers body away from or close to the fixed jaw, a large number of wedge-shaped grooves (5) being provided on an inner side wall extending along the long diameter direction of the long hole (4), the wedge-shaped grooves (5) being arranged in sequence along the long diameter direction of the long hole (4), fixed ratchet teeth (6) of the same shape being formed between adjacent wedge-shaped grooves (5), the top of the fixed ratchet teeth (6) being flush with the inner wall of the long hole (4) having the wedge-shaped grooves (5); The slider (2) is provided with at least one movable ratchet (7) cooperating with the fixed ratchet (6) on one side thereof facing the fixed ratchet (6), each movable ratchet (7) being located at one end of the slider (2), and an elastic body (8) is provided on the side of the slider (2) facing away from the fixed ratchet (6), the elastic body (8) and the movable ratchet (7) being located at the same end of the slider (2), one end of the elastic body (8) being connected to the slider, and the other end being in sliding contact with the inner wall of the opposite long hole (4); The fixed ratchet (6) and the movable ratchet (7) cooperate to enable the slider (2) to approach the front end of the guide body (1) in only one direction when subjected to a force in the long diameter direction of the long hole (4); It is characterized in that The sum of the width of the slider (2) and the height of the movable ratchet (7) along the short diameter direction of the long hole (4) is smaller than the short diameter of the long hole (4). A support body (9) is further provided on a side of the slider (2) facing away from the fixed ratchet (6). The support body (9) protrudes outside the slider (2) along the short diameter direction of the long hole (4). The height of the support body (9) is smaller than the difference between the short diameter of the long hole (4) and the width of the slider (2). The support body (9) and the elastic body (8) are respectively arranged at two ends of the slider (2). The inner wall of the long hole (4) abutted by the elastic body (8) is parallel to and faces the inner wall of the long hole (4) where the wedge-shaped groove (5) is provided. The pivot (3) is arranged in the middle of the slider (2) along the axial direction of the long hole (4). The support body (9) and the elastic body (8) are respectively arranged on both sides of the pivot (3).

2. The water pump pliers jaw adjustment mechanism according to claim 1, characterized in that: The support body (9) and the slider (2) are integrally formed, and the top end of the support body (9) is a convex arc-shaped curved surface.

3. The water pump pliers jaw adjustment mechanism according to claim 1, characterized in that: The support body (9) is a roller shaft, and a round-bottomed U-shaped groove (10) for embedding the roller shaft is provided on a side of the slider (2) facing away from the fixed ratchet (6). The roller shaft is partially embedded in the round-bottomed U-shaped groove (10) and partially exposed outside the slider (2). The roller shaft is slidably matched with the inner wall of the round-bottomed U-shaped groove (10), or the two ends of the roller shaft are rotatably connected to the two end walls of the round-bottomed U-shaped groove (10) through an end shaft (9a).

4. The water pump pliers jaw adjustment mechanism according to claim 1, characterized in that: The support body (9) is a plurality of balls arranged in sequence along the axial direction of the long hole (4), and the ball parts are slidably embedded in the slider (2).

5. The water pump pliers jaw adjustment mechanism according to claim 1, characterized in that: The elastic body (8) is a pre-compressed spring. A spring blind hole (11) extending along the width direction of the slider (2) is provided on a side of the slider (2) facing away from the fixed ratchet (6). The spring blind hole (11) and the movable ratchet (7) are located at the same end of the slider (2). The spring is inserted into the spring blind hole (11). One end of the spring extends out of the spring blind hole (11) and slides against the inner wall of the opposite long hole (4).

6. The water pump pliers jaw adjustment mechanism according to claim 1, characterized in that: The elastic body (8) is a pre-compressed round-bottomed "V"-shaped spring leaf. A round-bottomed "V"-shaped embedding groove (12) is provided on a side of the slider (2) facing away from the fixed ratchet (6). The "V"-shaped embedding groove (12) is closed at both axial ends. The "V"-shaped embedding groove (12) and the movable ratchet (7) are located at the same end of the slider (2). The bottom of the spring leaf is embedded in the "V"-shaped embedding groove (12). The two tops of the spring leaf extend out of the "V"-shaped embedding groove (12) and slide against the inner wall of the opposite long hole (4). The bottom angle of the "V"-shaped embedding groove (12) is greater than the bottom angle of the spring leaf.

7. A water pump pliers, comprising a fixed pliers body (100) and a movable pliers body (200), characterized in that: It also includes the water pump pliers jaw adjustment mechanism (300) as described in any one of claims 1 to 6 above, the fixed jaw (101) of the fixed pliers body (100) is connected to the front end of the guide body (1) of the water pump pliers jaw adjustment mechanism (300), the fixed pliers handle (102) of the fixed pliers body (100) is connected to the rear end of the guide body (1), the two ends of the pivot (3) respectively extend out of the slider (2), the movable pliers body (200) includes a movable jaw (201), a pivot part (202) and a movable pliers handle (203) connected in sequence, and the pivot part (202) and the movable pliers handle (203) are connected in sequence. The part (202) is provided with an assembly hole (204) for the guide body (1) to pass through, the guide body (1) is inserted into the assembly hole (204), the slider (2) is opposite to the pivotal parts (202) on both sides of the assembly hole (204) and is rotatably connected to the pivotal parts (202) via a pivot (3), the movable jaw (201) is opposite to the fixed jaw (101), the assembly hole (204) allows the guide body (1) to swing around the pivot (3) inside the assembly hole (204), and the wedge-shaped groove (5) is arranged on the inner wall of the long hole (4) on one side close to the jaws of the water pump pliers.

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