TWI847880B - Piston pushing tool - Google Patents

Abstract

A piston pushing tool, including two arm portions and two pushing portions. The two arm portions are connected to each other in a relatively open and closed manner. The two pushing members are used to extend between two objects. The two pushing members are respectively connected to the two arm members and are driven by the two arm members to move away from each other. The two pushing members are adapted for pushing the two objects, wherein at least one of the two objects is a piston. The two objects can be quickly stretched by operating the two arms. The overall structure is simple and the operation is quick and intuitive.

Description

Piston push tool

The present invention relates to hand tools, in particular to a piston pushing tool.

Disc brakes use the brake pads of the caliper to clamp the brake disc. As the brake pads wear and become thinner, the piston used to push the brake pads will gradually protrude from the caliper body. When replacing the new brake pads, the piston needs to be reset into the caliper. The traditional method is to use existing hand tools such as hammers and pry bars to directly hit and squeeze the piston to reset it. This often causes the piston structure to deform and reduce durability. Therefore, some industry players have developed brake piston pushing tools such as those disclosed in Taiwan Patents M615268 and M591026, which belong to this category.

However, the above-mentioned brake piston pushing tools all use hydraulic cylinders for pushing. The use of hydraulic cylinders will increase the cost of the entire device. At the same time, the internal oil will gradually deteriorate with the increase of use. Furthermore, in order to avoid oil leakage, higher precision requirements are imposed on structures and components during production and assembly, which also increases costs. In addition, when this device is damaged, it is difficult to repair, which is a shortcoming that needs to be improved urgently.

Therefore, it is necessary to provide a novel and advanced piston pushing tool to solve the above problems.

The main purpose of the present invention is to provide a piston pushing tool that can push the piston back into the caliper stably and quickly, and the overall structure is quite simple and reliable, with excellent durability and service life, and is quite convenient for maintenance.

To achieve the above-mentioned purpose, the present invention provides a piston pushing tool, comprising: two arms and two pushing members. The two arms can be connected relatively tightly. The two pushing members are used to extend between two objects. The two pushing members are respectively connected to the two arms and driven by them to move away from each other to push the two objects. At least one of the two objects is a piston.

1: Arm parts

11: Head

12: Body

13: Operation Department

14: The second set of joints

2: Push piece

21: Pushing part

22: The first set of joints

23: convex seat

3: Driving mechanism

31: First base

311: Through hole

32: Second base

321: screw hole

33: Drive screw

34: Driving head

341: First drive unit

35:Shaft

41: First axis

42: Second axis

5: Objects

6: Grip

Figure 1 is a three-dimensional diagram of an embodiment of the present invention.

Figure 2 is an exploded view of Figure 1.

Figures 3 and 4 are schematic diagrams of the operation steps of an embodiment of the present invention.

The following examples are only used to illustrate possible implementations of the present invention, but they are not intended to limit the scope of protection of the present invention. The "one" or "at least one" before the terms mentioned in the text does not limit the quantity. It can also be "plural" according to needs. This change in quantity is also within the scope of protection, which should be explained first.

Please refer to Figures 1 to 4, which show an embodiment of the present invention. The piston push tool of the present invention includes: two arm parts 1 and two push parts 2.

The two arms 1 can be connected relatively to each other, and the two push members 2 are used to extend between the two objects 5. The two push members 2 are respectively connected to the two arms 1 and driven by them to move away from each other to push the two objects 5. At least one of the two objects 5 is a piston. In this embodiment, the two objects 5 are pistons. The two arms 1 are made of metal material, and the two push members 2 are made of metal material, so as to have a hard structure and a better service life.

More specifically, the piston pushing tool further includes a first pivot 41, and the two arm members 1 are pivotally connected to each other through the first pivot 41. The two arm members 1 are connected in this simple manner and can quickly drive the two pushing members 2 to move simultaneously, which has the advantage of rapid production and assembly. More specifically, each arm 1 includes a head 11, a body 12 and an operating part 13 connected in sequence, the angle between the operating part 13 and the head 11 is greater than 110 degrees, the first pivot 41 is penetrated through the body 12 of the two arm 1, the two push members 2 are connected to the heads 11 of the two arm 1, and the heads 11 of the two arm 1 are between the two push members 2; wherein, when the operating parts 13 of the two arm 1 are relatively close to each other, the heads 11 of the two arm 1 are relatively far away, thereby driving the two push members 2 to push the two objects 5 located on the two sides.

Preferably, the two push members 2 are separately arranged at the heads 11 of the two arm members 1 so as to be swingable relative to the two arm members 1. In this way, when the heads 11 of the two arm members 1 move in an arc shape and move relatively far away from each other, the two push members 2 can swing relatively with the angle change and keep pressing the two objects 5 stably to push the two objects 5 to move in a straight line.

The piston push tool further includes two second pivots 42, each of the push members 2 includes a push portion 21 and a first assembly portion 22 connected to each other, each of the arm members 1 includes a second assembly portion 14, and the two second pivots 42 respectively penetrate the first assembly portions 22 of the two push members 2 and the second assembly portions 14 of the two arm members 1. The two push members 2 can rotate with the two second pivots 42 as axes and swing relative to the two arm members 1.

More specifically, the first assembly part 22 includes two convex seats 23 arranged at intervals, the second assembly part 14 is a through hole provided in the head part 11, the head part 11 is clamped and limited between the two convex seats 23, and the second pivot 42 passes through the two convex seats 23 and the through hole of the head part 11. More specifically, each arm part 1 is plate-shaped, and each push-pull part 2 is plate-shaped so as to be inserted into a narrow and elongated space for use, the plate surface of the push-pull part 2 is larger than the plate surface of the head part 11, and the thickness of the push-pull part 2 is smaller than the thickness of the head part 11.

It is worth mentioning that the piston push tool further includes a driving mechanism 3, which includes a first base 31, a second base 32 and a driving screw 33. The first base 31 is rotatably disposed on one of the arms 1, and the second base 32 is rotatably disposed on the other arm 1. The driving screw 33 penetrates the first base 31 and the second base 32 and is screwed to at least one of them, so that the two arms 1 can be driven to open by rotating the driving screw 33.

In more detail, the drive screw 33 includes a connected drive head 34 and a shaft 35. The first base 31 is equal to the second base 32. The first base 31 is provided with a through hole 311. The second base 32 is provided with a screw hole 321. The hole diameter of the through hole 311 is larger than the radial dimension of the shaft 35. The shaft 35 passes through the through hole 311 and is screwed to the screw hole 321. In the direction of the shaft 35 passing through, the first base 31 is between the second base 32 and the drive head 34. The drive head 34 is used to force the first base 31 to approach the second base 32, thereby driving the two arms 1 to lean against each other.

In actual use, the user can first directly control the operating parts 13 of the two arm members 1 to lean against each other so that the two push members 2 can quickly stick to the two objects 5. Then, the user can rotate the drive screw 33 to force the operating parts 13 of the two arm members 1 to lean against each other further, so that the two push members 2 can continue to push the two objects 5 with a smaller force, so as to achieve the effect of making the two objects 5 (pistons) relatively far apart and reset.

Preferably, the driving head 34 includes a first driving part 341, which is the outer peripheral wall of the driving head 34 with a non-circular profile. The user can rotate the first driving part 341 by connecting other tools to the first driving part 341, thereby generating a larger torque on the driving head 34 or achieving the purpose of labor saving. For example, the first driving part 341 is rotated by clamping it with an open-end wrench.

Another preferred embodiment is that a handle 6 is protruded from the operating portion 13 of the arm 1 to facilitate the user's hand to hold it; and the handle 6 is columnar and made of rubber material to provide a better grip handle; in addition, the radial dimension of the handle 6 is larger than the radial dimension of the operating portion 13 of the arm 1, so that there is a larger contact area.

1: Arm parts

2: Push piece

3: Driving mechanism

6: Grip

Claims (9)

A piston pushing tool comprises: two arms, which can be connected to each other in an open and closed manner; two pushing members, which are inserted between two objects, respectively connected to the two arms and driven by the two arms to move away from each other to push the two objects, at least one of the two objects is a piston; and a driving mechanism, which comprises a first base, a second base and a driving screw, the first base is rotatably arranged on one of the arms, the second base is rotatably arranged on the other arm, the driving screw passes through the first base and the second base and is mutually screwed with at least one of them, and the two arms can be driven to open and close by rotating the driving screw. The piston pushing tool as described in claim 1 further includes a first pivot, and the two arm members are pivotally connected to each other through the first pivot. As described in claim 2, the piston pushing tool, wherein each arm member includes a head, a body and an operating part connected in sequence, the first pivot is passed through the body of the two arm members, and the two pushing members are connected to the heads of the two arm members; wherein, when the operating parts of the two arm members are relatively close to each other, the heads of the two arm members are relatively far away from each other. As described in claim 1, the driving screw includes a driving head and a rod body connected to each other, the first base is provided with a through hole, the second base is provided with a screw hole, the hole diameter of the through hole is larger than the radial dimension of the rod body, the rod body is passed through the through hole and screwed to the screw hole; wherein, in the direction of the rod body being passed through, the first base is between the second base and the driving head, the driving head is used to force the first base to approach the second base, thereby driving the two arms to lean against each other. As described in claim 4, the piston pushing tool, wherein the driving head includes a first driving portion, and the first driving portion is the outer peripheral wall of the driving head with a non-circular contour. A piston pushing tool as described in claim 1, wherein each arm member is plate-shaped, and each pushing member is plate-shaped. A piston pushing tool as described in any one of claims 1 to 6, wherein the two pushing members are separately arranged on the two arm members so as to be swingable relative to the two arm members. The piston push tool as described in claim 7 further includes two second pivots, each of the push members includes a push portion and a first assembly portion connected to each other, each of the arm members includes a second assembly portion, the two second pivots respectively penetrate the first assembly portions of the two push members and the second assembly portions of the two arm members, and the two push members can rotate with the two second pivots as axes and swing relative to the two arm members. The piston pushing tool as described in claim 5 further includes a first pivot, and the two arms are pivotally connected to each other through the first pivot; each arm includes a head, a body and an operating part connected in sequence, the first pivot is passed through the body of the two arms, the two pushing parts are connected to the heads of the two arms, and the heads of the two arms are between the two pushing parts; wherein, when the operating parts of the two arms are When the two arms are relatively close to each other, the heads of the two arms are relatively far away; each arm is plate-shaped, and each push-pull member is plate-shaped; the two push-pull members are respectively arranged on the two arms so as to be swingable relative to the two arms; the piston push-pull tool further comprises two second pivots, each push-pull member comprises a push-pull portion and a first assembly portion connected to each other, each arm comprises a second assembly portion, and the two second pivots respectively penetrate the two push-pull members The first assembly part and the second assembly part of the two arm parts, the two push members can rotate about the two second pivots and swing relative to the two arm parts; the plate surface of the push member is larger than the plate surface of the head, and the thickness of the push member is smaller than the thickness of the head; the first base and the second base are of the same size; the first assembly part includes two convex seats arranged at intervals, the second assembly part is a through hole set in the head, and the head The clamping part is located between the two convex seats, and the second pivot passes through the two convex seats and the through hole of the head; the two arm members are made of metal material, and the two push members are made of metal material; the angle between the operating part and the head is greater than 110 degrees; a handle is convexly arranged on the operating part of the arm member, the handle is columnar, the handle is made of rubber material, and the radial dimension of the handle is greater than the radial dimension of the operating part of the arm member.

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