CN218992177U - Piston for clutch booster - Google Patents

Abstract

The utility model relates to the technical field of booster pistons, in particular to a piston for a clutch booster, which comprises a piston body, a sealing block, an O-shaped sealing ring and a plastic plug, wherein a containing cavity is arranged on the piston body, one end of the containing cavity is provided with an opening at one end face of the piston body, the sealing block is a cylinder, the sealing block is fixed at one end, close to the opening, in the containing cavity, the O-shaped sealing ring is sleeved on the sealing block, the plastic plug is in a molten state when entering the opening, and is cooled to be in a solid state after entering the opening for a period of time.

Description

Piston for clutch booster

Technical Field

The utility model relates to the technical field of booster pistons, in particular to a piston for a clutch booster.

Background

The clutch booster is mainly used for a vehicle with a hydraulic system for operating a clutch mechanism. The assembly is used to help increase the output force and facilitate operation when the operating clutch is disengaged or engaged. In order to reduce the forces acting on the clutch pedal as much as possible, without increasing the pedal travel due to excessive gear ratios of the transmission, medium-heavy vehicles and some automobiles are provided with various booster devices on the basis of mechanical or hydraulic actuating mechanisms. When the clutch pedal is depressed, hydraulic oil forms a certain pressure in the clutch master cylinder and then enters the clutch booster. At this time, hydraulic oil enters a clutch booster hydraulic system, acts on a hydraulic piston, and pushes a piston rod to advance.

The booster can also adopt magnetic force as a power source besides hydraulic pressure as the power source. The piston is internally provided with a containing cavity for containing the magnetic element, one end of the containing cavity is provided with an opening at one end face of the piston, and the magnetic element enters the containing cavity through the opening. The prior magnetic clutch booster is provided with a sealing cover on the opening after the magnetic element is placed in the accommodating cavity, and the magnetic element is sealed in the accommodating cavity. However, gaps exist between the opening and the sealing cover, other liquids such as brake fluid can enter the accommodating cavity through the gaps to corrode the magnetic element, and magnetism of the magnetic element can be influenced for a long time, so that movement of the piston is influenced.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is that a gap exists between the opening of the accommodating cavity and the sealing cover of the existing magnetic booster piston, and brake fluid easily enters the accommodating cavity through the gap to corrode the magnetic element in the accommodating cavity.

In order to solve the technical problems, the utility model provides a piston for a clutch booster, which comprises a piston body, a sealing block, an O-shaped sealing ring and a plastic plug, wherein a containing cavity is arranged on the piston body, one end of the containing cavity is provided with an opening at one end face of the piston body, the sealing block is a cylinder, the sealing block is fixed at one end, close to the opening, in the containing cavity, the O-shaped sealing ring is sleeved on the sealing block, the plastic plug is in a molten state when entering the opening, and the plastic plug is cooled to be in a solid state after entering the opening for a period of time.

Preferably, the accommodating cavity comprises a main cavity and an opening sealing cavity, the opening sealing cavity is arranged at one end close to the opening, the diameter of the opening sealing cavity is larger than that of the main cavity, the diameter of the sealing block is equal to that of the opening sealing cavity, and the inner side end of the sealing block is abutted to one end where the opening sealing cavity and the main cavity meet.

Preferably, the circumferential surface of the sealing block is provided with a circumferential surrounding accommodating groove, and the O-shaped sealing ring partially extends out of the accommodating groove in a natural state.

Preferably, the piston body comprises a plug part and a rod part, the accommodating cavity is arranged in the rod part, and clamping grooves for clamping the pull rod of the two-position three-way valve are formed in two ends of one side, connected with the rod part, of the plug part.

The technical scheme of the utility model has the following advantages:

according to the piston for the clutch booster, provided by the utility model, the sealing block can resist large-particle impurities for the accommodating cavity and prevent the large-particle impurities from entering the accommodating cavity, and meanwhile, the sealing block provides a carrier for installing the O-shaped sealing ring. The O-shaped sealing ring can close the gap between the opening and the sealing block, so that brake fluid and moist air are prevented from entering the accommodating cavity, and the magnetic element is prevented from being corroded. The plastic plug can further strengthen the tightness of the opening (prevent large particle impurities and brake fluid), limit the sealing block and prevent the sealing block from separating from the accommodating cavity from the opening. The utility model enhances the tightness of the opening of the accommodating cavity, prevents other liquids such as brake fluid from entering the accommodating cavity through the gap to corrode the magnetic element, and ensures the normal movement of the piston.

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 description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a piston for a clutch booster according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1 in accordance with the present utility model;

FIG. 3 is a schematic illustration of a piston of the present utility model with magnetic elements, blocks, O-rings and plastic plugs removed;

fig. 4 is a cross-sectional view of a closure of the present utility model.

Reference numerals illustrate: 10. a piston body; 20. sealing blocks; 21. a receiving groove; 30. an O-shaped sealing ring; 40. a plastic plug; 50. a magnetic element; 11. a plug portion; 12. a stem portion; 121. a receiving chamber; 122. an opening; 121a, a main cavity; 121b, sealing the cavity; 11a, a clamping groove; 11b, hooks.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled 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.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

The utility model provides a piston for a clutch booster, which comprises a piston body 10, a sealing block 20, an O-shaped sealing ring 30 and a plastic plug 40, wherein a containing cavity 121 is arranged on the piston body 10, one end of the containing cavity 121 is provided with an opening 122 at one end face of the piston body 10, the sealing block 20 is a cylinder, the sealing block 20 is fixed at one end, close to the opening 122, in the containing cavity 121, the O-shaped sealing ring 30 is sleeved on the sealing block 20, the plastic plug 40 plugs the opening 122, the plastic plug 40 is in a molten state when entering the opening 122, and the plastic plug enters the opening 122 for a period of time and then is cooled to be in a solid state.

The seal 20 can withstand large particle impurities for the receiving cavity 121, preventing large particle impurities from entering the receiving cavity 121, while the seal 20 provides a carrier for the installation of the O-ring 30. The O-ring 30 may close the gap between the opening 122 and the block 20, thereby preventing brake fluid and humid air from entering the receiving chamber 121, preventing the magnetic element 50 from being corroded. The plastic stopper 40 not only can further enhance the sealing performance (block large particle impurities and brake fluid) of the opening 122, but also can limit the sealing block 20 to prevent the sealing block 20 from being separated from the accommodating cavity 121 from the opening 122.

Preferably, the accommodating cavity 121 includes a main cavity 121a and a sealing cavity 121b, the sealing cavity 121b is disposed at one end close to the opening 122, the diameter of the sealing cavity 121b is larger than that of the main cavity 121a, the diameter of the sealing block 20 is equal to that of the sealing cavity 121b, and the inner end of the sealing block 20 is abutted to one end where the sealing cavity 121b meets the main cavity 121 a. Dividing the accommodating chamber 121 into a main chamber 121a and a sealing chamber 121b can limit the depth of the sealing block 20 into the accommodating chamber 121. Because the diameter of the seal 20 is equal to the diameter of the seal cavity 121b, and therefore larger than the diameter of the body cavity, the seal 20 extends up to the inner end of the seal cavity 121 b. The plastic plug 40 and the receiving cavity 121 are configured to cooperate to secure the block 20 in place.

The circumferential surface of the sealing block 20 is provided with a circumferential containing groove 21, and the O-shaped sealing ring 30 partially extends out of the containing groove 21 in a natural state. The setting of holding tank 21 not only can consolidate the fixed of O type sealing washer 30, prevent that O type sealing washer 30 from sliding on closing piece 20, moreover when the O type sealing washer 30 thickness that adopts is very big, still can't install holding chamber 121 after holding chamber 121 inner wall compression extremely in, through the face fluting in the closing piece 20 circumference for the radial distance between the outer peripheral face of O type sealing washer 30 and the closing piece 20 center reduces, reduces the burden for the compression of O type sealing washer 30, even the outer peripheral face diameter of O type sealing washer 30 is very big, also can offset the diameter value of part after installing on holding tank 21, makes O type sealing washer 30 can install smoothly into holding chamber 121.

The piston body 10 comprises a plug 11 and a rod 12, the accommodating cavity 121 is arranged in the piston rod, one side of the plug 11 connecting rod 12 is provided with clamping grooves 11a at two ends for clamping the two-position three-way valve pull rod, hooks 11b are arranged in the clamping grooves 11a, hooks and clamping blocks are also arranged on the three-way valve pull rod, the clamping blocks are clamped into the clamping grooves 11a, and the hooks on the three-way valve pull rod are mutually hooked with the hooks 11b in the clamping grooves 11a to connect the three-way valve pull rod with the plug 11.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (4)

1. The utility model provides a piston for clutch booster, includes piston body (10), be equipped with on piston body (10) and hold chamber (121), hold chamber (121) one end and be equipped with opening (122) in one of them terminal surface of piston body (10), its characterized in that still includes sealing piece (20), O type sealing washer (30) and plastics end cap (40), sealing piece (20) are the cylinder, sealing piece (20) are fixed hold chamber (121) are interior to be close to the one end of opening (122), O type sealing washer (30) cover is established on sealing piece (20), plastics end cap (40) are blocked opening (122), plastics end cap (40) are the molten state when getting into opening (122) get into cooling after a period becomes solid form.

2. The piston for a clutch booster according to claim 1, wherein the housing chamber (121) includes a main chamber body (121 a) and a seal chamber (121 b), the seal chamber (121 b) is disposed at one end near the opening (122), the diameter of the seal chamber (121 b) is larger than that of the main chamber body (121 a), the diameter of the seal block (20) is equal to that of the seal chamber (121 b), and the inner end of the seal block (20) abuts against one end where the seal chamber (121 b) meets the main chamber body (121 a).

3. A piston for a clutch booster according to claim 2, characterized in that the circumferential surface of the sealing block (20) is provided with a circumferentially encircling accommodation groove (21), and the O-ring (30) extends partly out of the accommodation groove (21) in a natural state.

4. A piston for a clutch booster according to claim 3, characterized in that the piston body (10) comprises a plug portion (11) and a rod portion (12), the accommodation chamber (121) is provided in the rod portion (12), and a clamping groove (11 a) for clamping the two-position three-way valve pull rod is provided at both ends of one side of the plug portion (11) connected with the rod portion (12).

Images