JP3871555B2 - Hydraulic fluid injection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for injecting hydraulic fluid into a master cylinder or the like constituting a hydraulic circuit of a hydraulic brake in a motorcycle.
[0002]
[Prior art]
FIG. 4 is a view showing a conventional hydraulic fluid injection device for a master cylinder of a motorcycle, with the main body case 102 of the master cylinder 1 being opened upward on a receiving pad 115 provided on the main body 111 of the clamp. supporting, this is closely resilient seal 1 40 is a frame-like packing to the upper end 108 of the peripheral wall portion 107 which surrounds the liquid chamber 106 of the body casing 102, fitting the injection cap 130 thereon into the liquid chamber 106. The injection cap 130 is attached to the lower end of the injection cylinder 120, and the hydraulic fluid 109 is injected into the liquid chamber 106 from the injection passages 124 and 131 formed in the injection cap 130 and the injection cylinder 120.
[0003]
[Problems to be solved by the invention]
By the way, in the case of the hydraulic fluid injection device, the hydraulic fluid 109 adheres to the surface of the elastic seal 140 every time the hydraulic fluid 109 is injected, and the hydraulic fluid 109 is provided with the elastic seal 140 by repeating this. Nevertheless, it oozes out and adheres to the outer surface of the main body case 102. Reference numeral 109a indicates a bleeding portion. As described above, when the hydraulic fluid 109 adheres to the outer surface of the main body case 102 as the protruding portion 109a, it may cause deterioration of the painted surface or the resin portion, leading to a reduction in quality. Therefore, in order to prevent such adhesion, it is necessary to wipe off the working fluid 109 from the main body case 102 and the elastic seal 140 for each injection, which increases the number of work steps and time. Accordingly, the present invention has an object to provide a hydraulic fluid injection device in which such adhesion of the hydraulic fluid 109 hardly occurs.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, a hydraulic fluid injection device according to the present invention includes a clamp that supports a master cylinder for generating hydraulic pressure, an injection cylinder integrated with the clamp, and an elastic seal provided at the tip of the injection cylinder. And an injection cap fitted into the case of the master cylinder, and from the injection passage provided in the injection cylinder into the case of the master cylinder in a state where the case of the master cylinder and the injection cap are liquid-tightly fitted by an elastic seal. In the hydraulic fluid injection device designed to inject the hydraulic fluid,
A pressurizing chamber is provided between the injection cap and the elastic seal, and the hydraulic fluid is injected into the pressurizing chamber by pressurizing the elastic seal so as to adhere to the inner wall surface of the case of the master cylinder. And
The elastic seal includes a flange portion that contacts an opening edge in the case of the master cylinder that is disposed to open upward, and a convex portion that covers the periphery of the injection cap and is fitted into the case of the master cylinder. With
Furthermore, this convex part is provided with a side wall that is continuously liquid-tightly and cylindrically adhered to the inner wall surface of the case of the master cylinder from the opening end to the inside during the pressurization, and a top part that is provided with an injection passage.
The top part is closely in contact with the convex part formed at the tip of the injection cap at the center inside, and the peripheral part continuous to the side wall around the convex part has a sloped shape,
This beveled portion covers a part of the pressurizing chamber between the convex portion at the tip of the injection cap and the side wall .
[0005]
At this time, before Symbol provided a connection to pressurized cylinder pressure chamber, it is divided within the pressure cylinder to the secondary chamber primary chamber pressurized source side of the pressurizing chamber side by a partition wall Good.
[0006]
【The invention's effect】
In the present invention, since the hydraulic fluid is injected in a state where the elastic seal is pressurized and closely adhered to the wall surface of the liquid chamber of the master cylinder, the hydraulic fluid is less likely to enter between the upper end of the case of the master cylinder and the elastic seal. It becomes difficult to adhere to the seal surface that contacts the upper end of the case. As a result, even if injection is repeated, it becomes difficult for the hydraulic fluid to adhere to the outer surface of the case of the master cylinder, so that the quality can be improved and the hydraulic fluid on the case surface of the master cylinder and the elastic seal is wiped off at each injection. This eliminates the need to improve work efficiency.
[0007]
Moreover, the said pressurization with respect to an elastic seal | sticker can be easily implement | achieved by filling a pressurized fluid into the pressurization chamber provided between the elastic seal | sticker and the injection | pouring cap.
Furthermore, when a pressurized cylinder is connected to the pressurized fluid and the inside of the pressurized cylinder is partitioned into a primary chamber and a secondary chamber, the hydraulic fluid enters the secondary chamber of the pressurized cylinder even if the elastic seal is broken. Since it stops at a stage and does not flow into the pressurizing source side, the pressurizing source side can be protected, and the reliability as the hydraulic fluid injection device can be improved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment will be described below with reference to the drawings. 1 is an enlarged cross-sectional view of a main part of an injection device according to an embodiment, FIG. 2 is a perspective view of a master cylinder, and FIG. 3 is an overall view of the device. First, in FIG. 2, the master cylinder 1 constitutes a hydraulic circuit of a hydraulic brake in a motorcycle, and the operation of the brake oil filled in the opening of the main body case 2 is sealed with a lid 3. The hydraulic pressure is generated by rotating the lever 4. The lever 4 is rotatably attached to the main body case 2 by a shaft 5. The master cylinder 1 is attached to a handle (not shown).
[0009]
FIG. 3 shows an apparatus for injecting hydraulic fluid into the master cylinder 1, and this apparatus comprises a clamp 10 and an injection cylinder 20 integrated therewith. The clamp 10 includes a substantially L-shaped clamp body 11 and a lever 13 connected via a rod 12, and the lever 13 is rotatably attached to an attachment portion 21 provided at an intermediate portion of the injection tube 20 by a shaft 14. It has been.
[0010]
An attachment head 22 is provided at the lower end of the injection cylinder 20, and an injection cap 30 is attached thereto by a bolt 23. The injection cap 30 is covered with an elastic seal 40, and the periphery is attached to the injection cap 30 with a bolt 41. The injection cylinder 20 is a cylindrical member that is long in the vertical direction in the figure. An injection passage 24 is provided over the entire length in the axial direction, the upper end is connected to a tank 25 filled with hydraulic fluid, and the lower end is an injection cap 30 up and down. It connects to the injection passage 31 which penetrates.
[0011]
A receiving pad 15 is provided on the horizontal part formed at the lower end of the clamp body 11, and the body case 2 is supported here. If the lever 13 is rotated in the clockwise direction in the figure to the solid line position in the figure, If the main body case 2 is raised and a part of the injection cap 30 is fitted into the main body case 2 to obtain the injection position, and the lever 13 is rotated in the reverse direction, the clamp body 11 is lowered to the phantom line position in the figure. The main body case 2 is separated from the injection cap 30.
[0012]
As shown in FIG. 1, the main body case 2 has a container shape in which a part is opened, the inside is a hydraulic fluid chamber 6, and the opening is upward and is supported by the receiving portion pad 15.
The injection cap 30 has a convex portion 32 that fits into the liquid chamber 6, and the injection passage 31 vertically penetrates the convex portion 32. Further, a pressurizing chamber 33 is provided around the convex portion 32, and the pressurizing chamber 33 is connected to the pressurizing cylinder 35 through a pressurized fluid passage 34 formed through the injection cap 30.
[0013]
The pressurizing cylinder 35 is partitioned into a primary chamber 37 and a secondary chamber 38 by a partition wall 36, the primary chamber 37 is connected to a pressurizing source side (not shown), and the secondary chamber 38 is connected to the pressurized fluid passage 34. Connected. The pressurizing source is an air pump or a hydraulic pump. The partition wall 36 can be composed of a piston member, a working fluid 9, and a diaphragm that does not allow the pressurized fluid to pass therethrough.
[0014]
The elastic seal 40 is made of an elastic and elastic material having excellent water / oil resistance and non-permeability to gas / liquid, such as rubber and elastomer, and the convex portion 42 covering the periphery of the convex portion 32 and the flange of the injection cap 30. The flange part 43 which contacts the part 39 is provided integrally.
[0015]
The convex portion 42 is adapted to be fitted into the liquid chamber 6 of the main body case 2 together with 32 of the injection cap 30, and the outer surface of the side wall 44 is the inner surface of the peripheral wall 7 of the liquid chamber 6 in the illustrated fitting. It comes to adhere to. Further, the side wall 44 covers the pressurizing chamber 33 to form a part of the wall of the pressurizing chamber 33, and the pressurizing chamber 33 is filled with a pressurized fluid from the pressurizing cylinder 35, so that the peripheral wall 7 is liquid tight. It is pressed and comes into close contact.
[0016]
An injection passage 45 communicating with the injection passage 31 is formed at the center of the convex portion 42, and the tank 25 (FIG. 2) and the liquid chamber 6 are communicated with each other through the injection passages 45, 31, and 24. The flange portion 43 abuts on the flange portion 39 of the injection cap 30 and is fixed by the bolt 41, and the lower surface is in close contact with the upper end surface 8 of the peripheral wall 7.
[0017]
Next, the operation of this embodiment will be described. To fill the main body case 2 with the working fluid, when the main body case 2 is supported on the receiving pad 15 in FIG. 3 and the lever 13 is raised to raise the clamp main body 11, as shown in FIG. The convex portion 32 of the injection cap 30 and the convex portion 42 of the elastic seal 40 are fitted into the second liquid chamber 6, and the flange portion 43 is pressed against the upper end surface 8 of the peripheral wall 7 to be sealed in a liquid-tight manner.
[0018]
When the primary chamber 37 of the pressure cylinder 35 is pressurized in this state, the secondary chamber 38 is pressurized via the partition wall 36. As a result, the pressurized fluid is filled into the pressurizing chamber 33 through the pressurized fluid passage 34 to pressurize the side wall 44, and the side wall 44 is pressed against the inner surface of the peripheral wall 7 to be sealed in a liquid-tight manner. That is, the peripheral wall 7 is liquid-tightly sealed by the elastic seal 40 from the inner wall surface to the upper end surface 8.
[0019]
Therefore, when the hydraulic fluid 9 is injected from the tank 25 into the liquid chamber 6 through the injection passages 24, 31 and 45, the side wall 44 of the hydraulic fluid 9 filling the liquid chamber 6 is in close contact with the peripheral wall 7. , Does not enter the outer surface of the side wall 44, and does not enter the upper end surface 8 of the peripheral wall 7.
[0020]
Therefore, when the clamp body 11 is lowered and the body case 2 is separated from the injection cap 30 and the elastic seal 40, the working fluid 9 adheres to the top portion 46 that enters the liquid chamber 6 of the convex portion 42, but is outside the side wall 44. It does not adhere to the surface. Therefore, even if the injection is repeated, the possibility that the hydraulic fluid adhering to the top 46 passes through the outer surface of the side wall 44 and further oozes out through the upper end surface 8 sealed by the flange portion 43 is significantly reduced.
[0021]
As described above, according to the present embodiment, the hydraulic fluid is applied in a state in which the portion of the elastic seal 40 that fits into the main body case 2 is pressurized and is in close contact with the inner wall surface of the peripheral wall 7 surrounding the liquid chamber 6 of the main body case 2. Therefore, the hydraulic fluid does not enter the upper end surface 8 from the inner wall surface of the peripheral wall 7 and is difficult to adhere to the seal surface that contacts this portion. The quality can be improved by making the hydraulic fluid 9 difficult to adhere to the surface. In addition, it is not necessary to wipe off the working fluid adhering to the surface of the main body case 2 and the elastic seal 40 every injection, so that the working efficiency can be improved.
[00022]
Further, pressurization of the elastic seal 40 can be easily realized by filling the pressurizing chamber 33 provided between the elastic seal 40 and the injection cap 30 with a pressurized fluid.
Further, since the inside of the pressurizing cylinder 35, which is formed by the pressurized fluid via the pressurized fluid passage 34, is partitioned into the primary chamber 37 and the secondary chamber 38 by the partition wall 36, even if the elastic seal 40 is damaged. Even if the hydraulic fluid 9 enters the pressurized cylinder 35 through the pressurized fluid passage 34, it stops when it enters the secondary chamber 38 by the partition wall 36. Therefore, since the working fluid 9 does not flow to the pressurizing source side, the pressurizing source side can be protected, and the reliability as the working fluid injection device can be improved.
[0023]
The pressurized fluid may be a gas such as air or a fluid such as pressurized oil. Furthermore, the master cylinder is not limited to the brake, but may be used for other hydraulic circuits such as a hydraulic clutch.
[Brief description of the drawings]
1 is an enlarged cross-sectional view of a main part of an injection apparatus according to an embodiment. FIG. 2 is a perspective view of a master cylinder. FIG. 3 is an overall view of the apparatus. Explanation】
1: master cylinder, 2: body case, 6: liquid chamber, 7: peripheral wall, 10: clamp, 11: clamp body, 13: lever, 20: injection cylinder, 24: injection passage, 30: injection cap, 31: injection Passage, 32: convex portion, 33: pressurizing chamber, 34: pressurized fluid passage, 35: pressurizing cylinder, 40: elastic seal, 42: convex portion, 43: flange portion, 44: side wall, 45: injection passage

Claims (2)

A clamp for supporting a master cylinder for generating hydraulic pressure, an injection cylinder integral with the clamp, and an injection cap provided at the tip of the injection cylinder and fitted into the case of the master cylinder via an elastic seal In the hydraulic fluid injection device that injects the hydraulic fluid into the master cylinder case from the injection passage provided in the injection cylinder in a state where the case and the injection cap of the master cylinder are fluid-tightly fitted by an elastic seal,
A pressurizing chamber is provided between the injection cap and the elastic seal, and the hydraulic fluid is injected into the pressurizing chamber by pressurizing the elastic seal while being in close contact with the inner wall surface of the case of the master cylinder. And
The elastic seal includes a flange portion that contacts an opening edge in the case of the master cylinder that is disposed to open upward, and a convex portion that covers the periphery of the injection cap and is fitted into the case of the master cylinder. With
The protrusion further includes a side wall which is in close contact with the liquid-tight and tubular continuously from the pressurized to the the open end into the casing inner wall surface of the master cylinder to the interior, and a top portion provided with injection passage,
The top portion has a convex portion formed at the tip of the injection cap in the center inside, and a peripheral portion continuous to the side wall around the convex portion has a slope shape,
This beveled portion covers a part of the pressurizing chamber between the convex portion at the tip of the injection cap and the side wall,
A hydraulic fluid injection device characterized by that.   A pressurizing cylinder is provided in connection with the pressurizing chamber, and the inside of the pressurizing cylinder is divided into a primary chamber on the pressurizing source side and a secondary chamber on the pressurizing chamber side by a partition wall. Item 1. The hydraulic fluid injection device according to Item 1.

Images