CN220740974U - Vehicle piston pusher - Google Patents

Abstract

The utility model discloses a vehicle piston pusher, which comprises a rotating member arranged on a base, wherein the rotating member comprises an inner cylinder and an outer cylinder connected with the inner cylinder; a movable plate having an outer surface and an inner surface opposite to the outer surface, the outer surface abutting at least the piston, the inner surface being provided with a screw which is screwed in a direction axially to the inner cylinder rotating member; a direction conversion ratchet wrench connected to the rotating member and rotationally driving the rotating member such that the movable plate moves toward or away from the base; when the movable plate moves away from the base, the at least one piston is pushed back into the piston bore; and elastic means provided between the base and the movable plate, the elastic means having an elastic direction identical to an axial direction of the rotating member. The present utility model uses the cooperation between the rotary member and the screw rod to adjust the distance between the movable plate and the base, thereby achieving effective operation and structural simplification.

Description

Vehicle piston pusher

Technical Field

The present utility model relates to the technical field of automotive parts, and relates to a vehicle piston pusher for pushing a piston of a brake caliper of a vehicle rearward to mount a new brake lining.

Background

When changing the brake pads of a vehicle, a special tool is required to push the piston of the brake caliper back into the piston bore so that the brake caliper has enough room to install a new brake pad.

However, with conventional calipers, the space for the pad mounting is relatively limited. Without the aid of a specific tool, the user has little to no freehand installation of the brake pads.

In addition, the bare-handed installation process may compromise user safety, even if some vehicle service practitioners seek to push the piston back with the hydraulic device, the strength of the hydraulic device output may be excessive, which may risk damaging the piston and may cause oil leakage.

Disclosure of Invention

The utility model provides a vehicle piston pusher, a rotating member is arranged on a base of the vehicle piston pusher, the rotating member is driven by a ratchet wrench with switchable directions, a screw rod arranged on the rotating member triggers a movable plate to move towards or away from a base, so that the distance between the base and the movable plate is adjusted, and a piston is pushed back into a piston hole, thereby realizing structural simplification and operational convenience.

The specific technical scheme of the utility model is as follows:

a vehicle piston pusher comprising:

a rotating member arranged on the base, the rotating member comprising an inner cylinder and an outer cylinder connected with the inner cylinder;

a movable plate having an outer surface and an inner surface opposite to the outer surface, the outer surface abutting at least the piston, the inner surface being provided with a screw which is screwed in a direction axially to the inner cylinder rotating member;

a direction conversion ratchet wrench connected to the rotating member and rotationally driving the rotating member such that the movable plate moves toward or away from the base; when the movable plate moves away from the base, the at least one piston is pushed back into the piston bore;

and elastic means provided between the base and the movable plate, the elastic means having an elastic direction identical to an axial direction of the rotating member.

Preferably, the inner cylinder includes a screw hole coupled to a screw of the screw shaft, and the inner cylinder includes an external screw portion coupled to the screw of the outer cylinder.

Preferably, the screw is arranged perpendicular to the inner surface, and the outer side of the base faces away from the inner surface of the movable plate and is arranged parallel to the inner surface to contact the other piston.

Preferably, the resilient means is a compressible spring having a first end contacting the inner surface of the movable plate and a second end contacting the rotating member.

Preferably, the base further includes a support housing provided with a positioning groove that accommodates the rotating member;

the outer barrel of the rotating member includes an annular groove such that the first C-clip and the second end of the resilient means are disposed in the annular groove.

Preferably, the outer diameter of the first end of the resilient means is larger than the outer diameter of the second end of the resilient means.

Preferably, one end of the inner barrel is provided with a female ring for receiving a second C-clip having an outer diameter smaller than the outer diameter of the first C-clip and the outer diameter of the second end of the resilient means.

Preferably, the direction conversion ratchet wrench includes two lever bodies spaced apart from each other, the two lever bodies being pivotally provided at the rotating member;

and the direction conversion ratchet wrench further comprises:

a ratchet wheel disposed between the two rod bodies; the ratchet wheel is provided with an outer periphery and a ratchet wheel hole, the outer periphery is provided with a plurality of ratchet teeth in the circumferential direction, and the ratchet wheel hole is fixed on the outer surface of the outer tube;

a pawl pivotally disposed between the two lever bodies to engage with the ratchet teeth;

the operation shaft is fixed between the two rod bodies and extends along the direction away from the ratchet wheel, and a handle is arranged on the operation shaft.

The beneficial effects are that:

the present utility model uses the cooperation between the rotary member and the screw rod to adjust the distance between the movable plate and the base, thereby achieving effective operation and structural simplification.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a vehicle piston pusher of the present utility model.

Fig. 2 is an exploded view of the structure of the piston pusher for a vehicle of the present utility model.

Fig. 3 is a schematic side view of the vehicle piston pusher, showing a state of the movable plate disposed adjacent to the base.

Fig. 4 is a cross-sectional view taken along line 4-4 in fig. 3.

Fig. 5 is another schematic side view of the vehicle piston pusher, showing the movable plate disposed away from the base.

Fig. 6 is a cross-sectional view 6-6 taken along line in fig. 5.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 6, a vehicle piston pusher 100 according to an embodiment of the present utility model includes a base 10, a rotating member 20, a movable plate 30, a direction-switchable ratchet wrench 40, and an elastic device 50.

When a new brake lining is replaced, the user operates the direction-switchable ratchet wrench 40 to drive the movable plate 30 to move toward or away from the base 10;

when the movable plate 30 is moved away from the base 10, at least one piston is pushed back into the piston bore of the brake caliper, or both pistons are respectively pushed back into the corresponding piston bores.

The base 10 has an outer side 11 provided at one side thereof, and a support case 12 is disposed on a rear surface of the outer side 11, wherein the support case 12 has a cross section formed generally in a U shape and having a positioning groove 13 such that the rotating member 20 is rotatably disposed in the support case 12.

Referring to fig. 2 to 4, the rotating member 20 includes an inner cylinder 21 and an outer cylinder 22 engaged with the inner cylinder 21, and the length of the inner cylinder 21 is greater than that of the outer cylinder 22.

The inner tube 21 has a screw hole 211 having an external screw portion 212 provided on an outer peripheral surface 21 of the inner tube and disposed in axial alignment with the inner tube 21, the external screw portion 212 being screw-engaged with the outer tube 22.

Further, the outer cylinder 22 includes an annular groove 23, and a first C-shaped jig 24 is fitted into the annular groove 23 for restricting the positioning of the rotary member 20. Further, a concave ring 213 is provided at an end of the inner tube 21, and a second C-shaped clamp 25 is disposed in the concave ring 213 to prevent the inner tube 21 from retreating toward the inside of the outer tube 22 and also prevent the inner tube 21 and the outer tube 22 from being caught.

The movable plate 30 includes an outer surface 31 and an inner surface 32, and the inner surface 32 includes a vertically arranged threaded rod 33, and the threaded rod 33 is screwed into the threaded hole 211 of the inner tub 21 in the axial direction of the rotary member 20. The movable plate 30 with 10 bases of the outer side 11 facing away from the inner surface 32 and being arranged parallel to the inner surface 32.

The direction switching ratchet wrench 40 is connected with the rotating member 20 to drive the rotating member 20 to rotate to trigger the movable plate 30 to move toward or away from the base 10.

In some specific embodiments, the direction-switchable ratchet wrench 40 includes two lever bodies 41 spaced apart from each other and pivotally arranged at the rotary member 20, a ratchet 42 provided between the two lever bodies 41. The ratchet 42 includes an outer circumference provided with a plurality of ratchet teeth 421 on the outer circumference, and a ratchet hole fixed with the outer surface of the outer cylinder 22 of the rotary member 20.

Further, the direction-switchable ratchet wrench 40 includes a pawl 43, which pawl 43 is pivotally provided between the two lever bodies 41 for engagement with the ratchet teeth 421 of the ratchet 42. Both ends of the pawl 43 are selectively exposed on the two lever bodies 41 to be poked by a user to selectively engage the ratchet 42, thereby driving the direction-switchable ratchet wrench 40 to trigger rotation of the rotary member 20. Clockwise or counterclockwise. An operating shaft 44 is fixed between the two rod bodies 41. And extends away from the ratchet wheel 42, and the distal end of the operating shaft 44 is provided with a handle 45 which the user grips for operation.

The elastic means 50 is a compressible spring, which is provided between the base 10 and the movable plate 30. The elastic direction of the elastic means 50 is the same as the axial direction of the rotating member 20. The resilient means 50 comprises a first end 51 and a second end 52, wherein the outer diameter of the first end 51 is larger than the outer diameter of the second end 52. The first end 51 contacts the inner surface 32 of the movable plate 30. The second end 52 contacts the rotating member 20. In an embodiment of the utility model, the second end 52 of the resilient means 50 and the first C-clamp 24 engage in the annular groove 23. The diameter of the second C-clip 25 is smaller than the diameter of the first C-clip 24 and the diameter of the second end 52 of the resilient means 50.

Referring to fig. 5 and 6, when the piston is pushed back, the direction of the user drive switches the ratchet wrench 40 such that the direction of the ratchet 42 switches the rotating member 20 of the trigger of the ratchet wrench 40 stage to rotate simultaneously. Further, due to the screw-coupling between the inner cylinder 21 and the outer cylinder 22 of the rotary member 20, when the inner cylinder 21 moves a certain distance in the left direction according to the drawing, the threaded rod 33 plate 30 of the movable piece moves axially toward the inner cylinder, and thus, as shown in fig. 21, the movable plate 30 moves in the left direction from the base 10 according to the drawing, thereby pushing the piston back into the piston hole. Also, when the present utility model is to be stored, the direction-switchable ratchet wrench 40 is reversely driven, whereby the movable plate 30 is moved toward the base 10. Thus, the present utility model allows a user to operate the direction-switchable ratchet wrench 40 in a clockwise or counterclockwise direction to move the movable plate 30 toward or away from the base 10 for a piston pushing operation.

With this configuration, the present utility model can be applied to a brake lining replacement operation of a single piston type brake caliper and a double piston type brake caliper. For a single piston brake caliper, the movable plate 30 is moved away from the base 10 by abutting against the outer surface 31 of the movable plate 30 on the piston and driving the direction switching ratchet wrench 40, thereby expanding the movable plate 30 and the base 10 such that the movable plate 30 pushes the piston back into the piston bore to facilitate the bushing replacement operation. For a dual piston caliper, the outer surface 31 of the movable plate 30 abuts one piston and the outer side 11 of the base 10 abuts the other piston, and the direction switching ratchet wrench 40 is driven to move the movable plate 30 away from the base 10 to expand the distance between the movable plate 30 and the base 10, thereby pushing the two pistons back into the respective piston bores to facilitate the brake pad replacement operation.

The above-described embodiments are illustrative of the present utility model and are not intended to be limiting, and it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present utility model as defined by the appended claims and their equivalents.

Claims (8)

1. A vehicle piston pusher, comprising:

a rotating member arranged on the base, the rotating member comprising an inner cylinder and an outer cylinder connected with the inner cylinder;

a movable plate having an outer surface and an inner surface opposite to the outer surface, the outer surface abutting at least the piston, the inner surface being provided with a screw which is screwed in a direction axially to the inner cylinder rotating member;

a direction conversion ratchet wrench connected to the rotating member and rotationally driving the rotating member such that the movable plate moves toward or away from the base; when the movable plate moves away from the base, the at least one piston is pushed back into the piston bore;

and elastic means provided between the base and the movable plate, the elastic means having an elastic direction identical to an axial direction of the rotating member.

2. The vehicle piston pusher of claim 1 wherein:

the inner cylinder includes a screw hole coupled with the screw thread of the screw rod, and the inner cylinder includes an external screw thread portion coupled with the screw thread of the outer cylinder.

3. The vehicle piston pusher of claim 2 wherein:

the lead screw is disposed perpendicular to the inner surface, and an outer side of the base faces away from the inner surface of the movable plate and is disposed parallel to the inner surface to contact another piston.

4. The vehicle piston pusher of claim 1 wherein:

the resilient means is a compressible spring having a first end contacting the inner surface of the movable plate and a second end contacting the rotating member.

5. The vehicle piston pusher of claim 1 wherein:

the base also comprises a support housing provided with a positioning slot which accommodates the rotating member;

the outer barrel of the rotating member includes an annular groove such that the first C-clip and the second end of the resilient means are disposed in the annular groove.

6. The vehicle piston pusher of claim 5 wherein:

the outer diameter of the first end of the elastic means is larger than the outer diameter of the second end of the elastic means.

7. The vehicle piston pusher of claim 6 wherein:

one end of the inner cylinder is provided with a concave ring for accommodating a second C-shaped clamp, and the outer diameter of the second C-shaped clamp is smaller than the outer diameter of the first C-shaped clamp and the outer diameter of the second end of the elastic device.

8. The vehicle piston pusher of claim 1 wherein:

the direction conversion ratchet wrench includes two lever bodies spaced apart from each other, the two lever bodies being pivotally provided at the rotating member;

and the direction conversion ratchet wrench further comprises:

a ratchet wheel disposed between the two rod bodies; the ratchet wheel is provided with an outer periphery and a ratchet wheel hole, the outer periphery is provided with a plurality of ratchet teeth in the circumferential direction, and the ratchet wheel hole is fixed on the outer surface of the outer tube;

a pawl pivotally disposed between the two lever bodies to engage with the ratchet teeth;

the operation shaft is fixed between the two rod bodies and extends along the direction away from the ratchet wheel, and a handle is arranged on the operation shaft.