JP2863777B2 - Air bleeder tools - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tool for screwing or screwing a bleeder screw.

[Conventional technology]

As a conventional air bleeder, for example,
Is disclosed in Japanese Unexamined Patent Application Publication No. 2000-205,878. The bleeder screw of the air bleeder has a distal end provided with a valve body screwed to a hydraulic equipment main body (cylinder body). In such an air bleeder, the valve body of the bleeder screed is seated on a valve seat formed in the hydraulic equipment main body in a normal state other than during the air bleeding operation, and is in a closed state. And, at the time of air bleeding work, splice the hose to the base end of the bleeder screed,
The hexagonal part of the bleeder screw is screwed out with a tool such as a wrench, and the valve body is released from seating on the valve seat.The valve is opened and the hydraulic fluid containing air in the hydraulic equipment body is discharged from the hose. I do.

[Problem to be Solved by the Invention] However, in such a conventional air bleeder device, a bleeder screw is provided with a predetermined length of a base end thereof always protruding from a hydraulic equipment main body. Structure, it is susceptible to serious damage. For example, railway vehicles,
When mounted on a vehicle brake hydraulic device such as a motorcycle, a rally car, or a dump truck, a foreign object such as a stepping stone collides with the device, impairing the function and making it impossible to bleed the air. Further, in the worst case, the valve closed state is released due to the breakage of the bleeder screw, causing the hydraulic fluid to leak and the brake to be disabled. For this reason, consideration is given to the mounting position of the bleeder screw, and a position where foreign matter is unlikely to collide is selected to mount the bleeder screw. However, in this case, the mounting position of the bleeder screw is limited. In addition, not only the degree of freedom in design is impaired, but also the workability for venting air generally decreases. An object of the present invention is to provide a tool suitable for screwing or screwing a bleeder screw of an air bleeder that does not have the above technical problem.

[Means for solving the problem]

The present invention has been made in view of such a conventional technical problem, and the configuration of a tool of an air bleeder is a large diameter screw which is screwed into a large diameter hole of a bleeder hole formed in a hydraulic equipment main body. Portion, a small diameter portion having a valve body at the distal end capable of seating on the valve seat of the bleeder hole is formed, and has a deformed hole on the base end side of the large diameter portion, and the deformed hole and the small diameter portion An air bleeder tool for screwing or screwing a bleeder screw having a through hole connecting the outer periphery into or out of the bleeder hole, wherein the tool has an irregular cross section that engages with an irregular hole of the bleeder screw. It has a grip portion for rotating the deformed cross-section and a hose engaging portion for splicing the hose, and has a through-hole connected from the tip end surface of the deformed cross-section to the hose splicing portion. .

[Action]

The air bleeder tool engages the deformed section of the tool with the deformed hole of the bleeder screw during the air bleeding operation,
It is used to screw a bleeder screw from a large-diameter hole. When the bleeder screw is screwed out from the large-diameter hole and the bleeder screw is taken to the valve-open position, the deformed cross section of the tool is engaged with the deformed hole of the bleeder screw, so the small diameter of the bleeder hole is reduced. Hydraulic fluid containing air flowing from the hole through the valve seat into the large-diameter hole passes through the through-hole of the bleeder screw and does not leak out to the outside, and is connected to the hose joint from the tip end surface of the tool. It enters the hole and is led out to the hose that joins the hose joint.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment in which the present invention is applied to a brake device which is a hydraulic device for a vehicle. In the drawing, reference numeral 1 denotes a hydraulic equipment main body, such as a disk brake caliper main body, a drum brake wheel cylinder main body, and a proportioning valve main body. A bleeder hole 2 having an outer large-diameter hole 2a and a small-diameter hole 2d connected to the large-diameter hole 2a via an annular stepped surface 2b and a valve seat 2c is formed in the hydraulic equipment body 1. Have been. Further, a female screw 2e is screwed into the large-diameter hole 2a, and the small-diameter hole 2d is connected to a master cylinder (not shown) via a hydraulic circuit in the hydraulic equipment main body 1.

Numeral 3 indicates a bleeder screed, sequentially from the base end,
A small-diameter portion 3b having a large-diameter portion 3a and a conical valve element 3c at the tip is formed. The small diameter portion 3b has only to have a smaller sectional area than the large diameter portion 3a, and is not limited to a circular cross section. A hexagonal modified hole 3d opening in the base surface 3g is formed on the base end side of the large diameter portion 3a of the bleeder screw 3. The modified hole 3d and the small diameter portion are formed inside the bleeder screw 3. A through hole 3e connecting the outer circumference of the bleeder 3b is formed, and a male screw 3f screwed into the female screw 2e of the large diameter hole 2a of the bleeder hole 2 is formed in the large diameter portion 3a.

The axial length of the large-diameter portion 3a of the bleeder screw 3 is such that when the valve element 3c is seated on the valve seat 2c and assumes the closed position.
The base end surface 3g of the large diameter portion 3a is set so as to be located within the large diameter hole 2a of the bleeder hole 2, that is, the large diameter portion 3a is not projected outside the large diameter hole 2a.

FIGS. 3 and 4 show an L-shaped air bleeder tool 4, in which one end is formed with a hexagonally shaped cross section 4a which engages with a shaped hole 3d of the bleeder screw 3. The part forms a grip part 4b for rotating the deformed cross-section part 4a,
An end of the grip 4b forms a hose joint 4c for joining the flexible hose 5. In the inside of the tool 4, a through-hole 4d is formed, which is connected to the hose joint 4c from the distal end surface of the modified cross-section 4a. Also, on the tip surface of the modified cross-section 4a, the outer shape is substantially the same as the cross-sectional shape of the modified cross-section 4a,
A liquid seal 7 made of rubber and having a through hole 7a in the center thereof substantially matching the through hole 4d is attached. The deformed hole 3d and the deformed cross section 4a only need to be able to be engaged so that they cannot rotate relative to each other, and can have a wide variety of deformed shapes other than a circular shape as well as a hexagonal shape as in this embodiment.

 Next, the operation will be described.

First, during the air bleeding operation, as shown in FIG.
3c is seated on the valve seat 2c and the deformed cross section 4a of the tool 4 is inserted into the deformed hole 3d of the bleeder screw 3 at the valve closing position, and the gripper 4b is rotated by 1/2 to 1 so that the bleeder screw is rotated. Slightly extrude you 3. At this time, one end of the hose 5 is previously joined to the hose joint 4c at the end of the gripper 4b.
Is inserted into a glass or the like container (not shown). In this state, a brake pedal (not shown) is depressed. As a result, the hydraulic fluid containing air in the hydraulic circuit in the hydraulic equipment main body 1 passes through the small-diameter hole portion 2d of the bleeder hole 2 between the valve seat 2c and the valve element 3c in the valve open state, and the bleeder. Large diameter hole of hole 2
It flows into the gap between 2a and the small diameter portion 3b of the bleeder screw 3, and is further led to the irregularly shaped hole 3d via the through hole 3e opened on the outer periphery of the small diameter portion 3b. The hydraulic fluid, which is led to the deformed hole 3d and contains air, flows into the through hole 4d from the tip surface of the deformed cross section 4a of the tool 4, is guided to the hose joint 4c, and is joined to the hose joint 4c. It is discharged to a container (not shown) through the hose 5 thus made. At this time, the liquid seal 7 attached to the tip end surface of the irregular cross section 4a
Liquid leakage from between the deformed hole 3d and the deformed cross section 4a is reliably prevented.

When the air has sufficiently escaped, the tool 4 is rotated in the reverse direction, the bleeder screw 3 is screwed in, the valve element 3c is seated on the valve seat 2c, the valve is closed, and the air venting operation is completed.

Next, according to such an air bleeder, when the valve body 3c is seated on the valve seat 2c and takes the valve closing position, the large diameter portion 3a is positioned so as to be located in the large diameter hole portion 2a. The axial length of the portion 3a is set, and it is in a state of being immersed, for example, as shown in FIG. Therefore, even if a foreign substance such as a flying stone is scattered as the vehicle travels, most of the foreign substance only collides with the hydraulic equipment main body 1 and direct hit on the bleeder screw 3 is prevented. As a result, damage to the bleeder screw 3 is avoided. In order to obtain such an operation effectively, it is desirable that the large-diameter hole portion 2a is not opened forward in the traveling direction of the vehicle, but even if it is opened forward in the traveling direction of the vehicle, the bleeder screw 3a is not opened. Does not protrude from the hydraulic equipment body 1,
Damage to the bleeder screen 3 is reduced.

Since the bleeder screw 3 is hardly damaged, the mounting position of the bleeder screw 3 is hardly restricted, and the mounting position can be determined with the highest priority on the workability of the air bleeding operation. it can.

5 and 6 show other examples of the structure of the air bleeder tool. The tool 6 has a T-shape, and a distal end portion is formed with a modified cross section 6a which engages with a non-circular modified hole 3d of the bleeder screw 3, and a base end portion 6b orthogonal to the distal end portion. At both ends form grips 6c and 6d, respectively. And
A hose joint 6e projecting in the shape of a short cylinder at the center of the base end 6b.
A through hole 6f is formed inside the tool 6 to connect the hose joint 6e to the distal end face of the modified cross section 6a. The hose 5 is joined to the hose joint 6e.
This tool 6 also has the same outer shape as the cross-sectional shape of the deformed cross section 6a at the tip end surface of the deformed cross section 6a, and a through hole at the center.
Liquid seal 8 made of rubber and having a through hole 8a substantially matching 6f
Is affixed.

With the air bleeder tool 6 having such a structure, substantially the same operation as that of the above embodiment can be obtained with respect to the air bleeding operation. That is, the deformed cross section 6a of the tool 6 is inserted into the deformed hole 3d of the bleeder screw 3 in the valve closed position where the valve body 3c is seated on the valve seat 2c, and the gripper portions 6c and 6d are rotated to bleed the bleeder. The screw 3 is screwed out to take the valve opening position. As a result, the working fluid, which is present in the hydraulic circuit in the hydraulic equipment main body 1 and contains air, enters the through hole 6f of the tool 6 from the bleeder hole 2 and is guided to the hose joint 6e, thereby connecting the hose 5 Through the container outside the figure.

If the air has escaped, the tool 6 is rotated in the reverse direction to screw the bleeder screw 3 into the closed position, and the air bleeding operation is completed.

When the large diameter portion 3a of the bleeder screw 3 is immersed in the large diameter hole 2a as shown in FIG. 1, a space O is generated at the base end of the large diameter hole 2a of the bleeder hole 2. Therefore, this space O can be closed by a circular plug 9 as shown in FIG. The use of the plug 9 further effectively prevents the bleeder screw 3 from being damaged by foreign matter.

〔The invention's effect〕

As will be understood from the above description, by using the air bleeder tool according to the present invention, the air bleeder is used.
Easy and reliable bleeder bleeding.

[Brief description of the drawings]

1 to 4 show one embodiment of the present invention, FIG. 1 is a side view showing a cross section of an air bleeder, FIG. 2 is a front view showing an air bleeder, and FIG. 3 is an air bleeder. 4 is a side view showing the tool in a partial cross section, and FIGS. 5 and 6 show another example of the structure of the tool of the air bleeder. FIG. 6 is a partially omitted front view, FIG. 6 is a side view thereof, and FIG. 7 is a perspective view showing a plug. 1: hydraulic equipment body, 2: bleeder hole, 2a: large diameter hole, 2b: annular step surface, 2c: valve seat, 2d: small diameter hole, 2e: female screw, 3: bleeder screw, 3a: large diameter Part, 3b: small diameter part, 3c: valve, 3d: irregular hole, 3e: through hole, 3
f: Male thread, 3g: Base end face, 4: Air bleeder tool, 4a: Irregular cross section, 4b: Grip, 4c: Hose joint, 4d: Through hole, 5: Hose,
6: Air bleeder tool, 6a: Deformed section, 6b: Base end, 6c,
6d: gripping part, 6e: hose joint, 6f: through hole, 7, 8: liquid seal,
9: Plug.

Claims (1)

(57) [Claims] 1. A large-diameter portion screwed into a large-diameter hole portion of a bleeder hole formed in a hydraulic device main body, and a small-diameter portion having a valve body at a tip end capable of being seated on a valve seat of the bleeder hole are formed. Air for screwing or screwing a bleeder screw having a modified hole at the base end side of the large diameter portion and having a through hole connecting the modified hole and the outer periphery of the small diameter portion into the bleeder hole. A bleeder tool having a modified cross-section for engaging the modified hole of the bleeder screw, a grip for rotating the modified cross-section, and a hose engaging portion for joining the hose; A tool for an air bleeder, characterized in that a through-hole is provided for connecting from the distal end surface of the modified cross section to the hose engaging portion.