TWI821251B - Plug and hydraulic device - Google Patents

Abstract

The present invention provides a plug and a hydraulic device that can suppress oil splashing. The plug of the present invention is used in a hydraulic device of a small vehicle including a bicycle, and includes: a body disposed in an opening of a hydraulic chamber of the hydraulic device; and a flow path fluidly connected to the hydraulic chamber. The communication method is provided on the body; and the cover covers the end of the flow path on the opposite side to the hydraulic chamber.

Description

Plugs and hydraulic devices

The invention relates to a plug and a hydraulic device.

Small vehicles, including bicycles, sometimes use hydraulics.

However, before installing the hose to the hydraulic device, install a plug to prevent oil leakage in the hydraulic device. However, there are cases where oil may splash when the plug is pulled out, which may degrade the installation workability.

The present invention solves the above-mentioned problems, and its object is to provide a plug and a hydraulic device that can suppress oil splashing.

In order to solve the above problems and achieve the object, a plug according to a first aspect of the present invention is used to include A hydraulic device for a small vehicle, including a bicycle, further comprising: a main body disposed in an opening of a hydraulic chamber provided in the hydraulic device; and a flow path disposed in the main body to fluidly communicate with the hydraulic chamber. ; And a cover that covers the end of the flow path on the opposite side to the hydraulic chamber. According to the plug of the first aspect, as the cover is opened, one end of the flow path is opened. Therefore, when the plug is pulled out from the hydraulic device, a pressure difference between the inside and the outside of the hydraulic device is less likely to occur. Therefore, oil splashing can be suppressed.

In the plug according to the second aspect of the first aspect, the cover is integrally provided with the main body. According to the plug of the second aspect, the plug can be easily manufactured. In addition, the cover can be prevented from falling off the main body.

In the plug of the third aspect of the first or second aspect, the cover is configured to be at least partially detachable from the main body. According to the plug of the third aspect, the operation of opening the end of the flow path by pressing the cover can be easily performed.

In a fourth aspect of the plug as in any one of the above-described first to third aspects, the cover is pressed in a direction different from a direction away from the hydraulic chamber. The flow path is configured such that an end on the side opposite to the hydraulic chamber is open. According to the plug of the fourth aspect, oil splashing when the cover is detached from the main body can be suppressed.

In a fifth aspect of the plug according to any one of the above-mentioned first to fourth aspects, the cover is formed in a rod shape protruding from an end surface of the body opposite to the hydraulic chamber. According to the plug of the fifth aspect, the cover can be easily deformed.

In a plug according to a sixth aspect of any one of the above-mentioned first to fourth aspects, the cover contains synthetic resin. According to the plug of the sixth aspect, the plug can be easily manufactured.

In the plug according to the seventh aspect of any one of the first to sixth aspects, the main body contains synthetic resin. According to the plug of the seventh aspect, the plug can be easily manufactured.

An eighth aspect of the plug according to any one of the above-mentioned first to seventh aspects further includes a sealing member provided on the main body so as to face the hydraulic device. According to the plug of the eighth aspect, oil leakage between the plug and the hydraulic device can be suppressed.

In order to solve the above problems and achieve the object, a hydraulic device according to a ninth aspect of the present invention includes a plug as in any one of the first to eighth aspects, and a housing having the hydraulic chamber and for mounting the plug. body. According to the hydraulic device of the ninth aspect, as the cover is opened, one end of the flow path is opened. Therefore, when the plug is pulled out from the hydraulic device, a pressure difference between the inside and the outside of the hydraulic device is less likely to occur. Therefore, oil splashing can be suppressed.

The hydraulic device according to the tenth aspect of the ninth aspect further includes a control lever and a piston actuated by operation of the control lever. According to the hydraulic device according to the tenth aspect, a brake operating device capable of suppressing oil splash can be realized.

The hydraulic device according to the eleventh aspect of the ninth aspect further includes a brake pad and a piston that presses the brake pad against the rotating body. According to the hydraulic device of the eleventh aspect mentioned above, it is possible to realize the controllable Oil splash brake device.

According to the present invention, oil splashing can be suppressed.

1: Braking system

2: 1st hydraulic device

4: 2nd hydraulic device

6:Hose

7:Plug

7A:Plug

11: handle

13: Rotating body

15: Seat stays

21: Shell

22:Cylinder

23:Storage

24:Piston

25: Needle

26:Threaded casing joint

27: Bushing

28:Control lever

29: Fixture

41: Shell

45: Needle

46:Threaded casing joint

47: Bushing

48:Piston

49:brake pad

61:Hose body

65: Install components

66:Membrane

68:Block

69:rope

71:Ontology

73:Flow path

75: cover

75A: cover

77:Sealing components

100:box

101: Support components

201:Hydraulic room

202:Piston chamber

203:Hose installation room

211:Block

221: Thread groove

251:Ontology Department

256: Front end

261: Thread groove

281:Connection Department

282:Rotation axis

283:Connection components

284:rod

401:Hydraulic room

402:Piston chamber

403:Hose installation room

404:Flow path

421: Thread groove

461: Thread groove

611:Flow path

651: Ontology Department

652:Flange part

681:hole

711: concave part

Fig. 1 is a schematic diagram of the braking system according to the embodiment.

Fig. 2 is a cross-sectional view of the brake system according to the embodiment.

Fig. 3 is a cross-sectional view of the periphery of the needle according to the embodiment.

Fig. 4 is a cross-sectional view of the hose according to the embodiment.

Fig. 5 is a cross-sectional view of the first hydraulic device according to the embodiment.

Fig. 6 is a cross-sectional view of the second hydraulic device according to the embodiment.

7 is a cross-sectional view of the periphery of the plug according to the embodiment.

Fig. 8 is a cross-sectional view of the plug in the embodiment when the cover is detached.

Fig. 9 is a schematic diagram of the braking system of the embodiment during transportation.

Figure 10 is a perspective view of the hose of the embodiment before being connected to the hydraulic device.

Fig. 11 is an enlarged view of the periphery of the plug according to the modified example.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the present invention is not limited to this embodiment, and when there are a plurality of embodiments, it also includes a combination of the respective embodiments. For example, in this embodiment, the case where the human-driven vehicle is a bicycle is explained, but it can also be applied to other vehicles driven by human power.

(implementation form)

Fig. 1 is a schematic diagram of the braking system according to the embodiment. Fig. 2 is a cross-sectional view of the brake system according to the embodiment. Fig. 3 is a cross-sectional view of the periphery of the needle according to the embodiment. Fig. 4 is a cross-sectional view of the hose according to the embodiment. Fig. 5 is a cross-sectional view of the first hydraulic device according to the embodiment. Fig. 6 is a cross-sectional view of the second hydraulic device according to the embodiment. 7 is a cross-sectional view of the periphery of the plug according to the embodiment. Fig. 8 is a cross-sectional view of the plug in the embodiment when the cover is detached.

The brake system 1 of the embodiment is used for small vehicles. A small vehicle using the brake system 1 of this embodiment is, for example, a bicycle. Small vehicles are not limited to bicycles. Small vehicles include electric bicycles or other two-wheeled electric vehicles. Small vehicles include vehicles that do not require a driver's license to be driven on public roads. Small vehicles do not include vehicles with internal combustion engines. As shown in FIG. 1 , the brake system 1 includes a first hydraulic device 2 , a second hydraulic device 4 , and a hose 6 .

FIG. 4 shows the hose 6 connected before the first hydraulic device 2 and the second hydraulic device 4 . FIG. 5 shows the first hydraulic device 2 before it is connected to the hose 6 . FIG. 6 shows the second hydraulic device 4 before it is connected to the hose 6 .

As shown in Fig. 1, the first hydraulic device 2 is a brake operating device. As shown in FIGS. 1 and 2 , the first hydraulic device 2 includes a housing 21, a cylinder 22, a reservoir 23, a piston 24, a needle 25, a threaded sleeve joint 26, a bushing 27, a lever 28, and Fixture 29.

As shown in FIG. 1 , the housing 21 is installed on the handle 11 of the small vehicle through a clamp 29 . Lever 28 It is arranged to be able to rock relative to the housing 21 . As shown in FIG. 5 , the control lever 28 includes a connecting portion 281 , a rotating shaft 282 , a connecting member 283 , and a lever 284 . The connection part 281 is connected to the rod 284 via the connection member 283, and rotates about the rotation axis 282. When not in use, a stopper 211 is installed on the clamp 29 to limit the swing of the control rod 28 .

As shown in FIG. 1 , the cylinder 22 is provided in the casing 21 . The cylinder 22 is substantially cylindrical. As shown in FIG. 2 , the cylinder 22 is provided with a hydraulic chamber 201 . The hydraulic chamber 201 includes a piston chamber 202, a hose installation chamber 203 for installing the hose 6, and a threaded groove 221 provided in the hose installation chamber 203. The piston chamber 202 is arranged on the control rod 28 side with respect to the hose installation chamber 203 . In a state where the hose 6 is installed in the first hydraulic device 2, the hydraulic chamber 201 is filled with oil. The threaded groove 221 is provided on the inner peripheral surface of the hose installation chamber 203 . The reservoir 23 stores oil and communicates with the piston chamber 202 according to the position of the piston 24 .

As shown in FIG. 5 , the piston 24 is arranged in the piston chamber 202 . Piston 24 is connected to rod 284. As the control rod 28 swings, the rod 284 exerts force on the piston 24, and the piston 24 slides in the axial direction of the cylinder 22. In this manner, the first hydraulic device 2 includes the control lever 28 and the piston 24 that is actuated according to the operation of the control lever 28 . Thereby, the pressure of the oil in the piston chamber 202 and even the hydraulic chamber 201 changes.

As shown in FIG. 2 , the needle 25 is mounted on the cylinder 22 . The needle 25 is provided between the piston chamber 202 and the hose installation chamber 203 . The needle 25 has a communication hole connecting the piston chamber 202 and the hose installation chamber 203. In the hydraulic chamber 201, oil can move between the piston chamber 202 and the hose mounting chamber 203 via the needle 25. As shown in FIG. 3 , the needle 25 includes a body portion 251 and a tip portion 256 . The main body part 251 is cylindrical and is embedded in the cylinder 22 . The front end portion 256 is cylindrical and protrudes from the main body portion 251 toward the hose installation chamber 203 side.

As shown in FIG. 2 , the threaded sleeve joint 26 is installed on the cylinder 22 . The threaded sleeve joint 26 is inserted into the hose installation chamber 203 of the hydraulic chamber 201 . One end of the threaded sleeve joint 26 is disposed inside the hydraulic chamber 201 . The other end of the threaded sleeve joint 26 is disposed outside the cylinder 22 . The threaded casing joint 26 is cylindrical. The threaded sleeve joint 26 is provided with a threaded groove 261 on the outer peripheral surface. The threaded groove 261 is engaged with the threaded groove 221 of the hose installation chamber 203 . Furthermore, the threaded sleeve joint 26 may be multi-threaded. Thereby, the axial movement amount of the threaded sleeve joint 26 when rotated by a unit angle is increased.

As shown in FIG. 2 , the bushing 27 is arranged in the hose installation chamber 203 in the hydraulic chamber 201 . The bushing 27 is cylindrical. The bushing 27 is formed of, for example, copper or a copper alloy, but is not limited thereto. One end of the bushing 27 is connected to the inner peripheral surface of the hose installation chamber 203. The other end of the bushing 27 is connected to the end surface of the threaded casing joint 26. If the threaded sleeve joint 26 is rotated to enter the hose installation chamber 203 of the hydraulic chamber 201, the bushing 27 is pushed and deformed.

As shown in Figure 1, the second hydraulic device 4 is a brake device. As shown in FIGS. 1 and 2 , the second hydraulic device 4 includes a housing 41 , a needle 45 , a threaded sleeve joint 46 , a bushing 47 , a piston 48 , and a brake pad 49 (see FIG. 6 ).

As shown in FIG. 1 , the housing 41 is installed on the rear upper fork 15 of the frame of the small vehicle. The housing 41 can also be installed on the front fork of the frame of a small vehicle. As shown in FIG. 6 , the piston 48 and the brake pad 49 are arranged in the housing 41 . The piston 48 is slidable relative to the housing 41 . The brake pad 49 is movably supported on the housing 41 via a pad pin (not shown).

As shown in FIGS. 2 and 6 , the housing 41 is provided with a hydraulic chamber 401 . The hydraulic chamber 401 has a piston chamber 402. A hose installation chamber 403 for installing the hose 6, a flow path 404 provided between the piston chamber 402 and the hose installation chamber 403, and a threaded groove 421 provided in the hose installation chamber 403. The piston chamber 402 is arranged on the piston 48 side with respect to the hose installation chamber 403 . The piston 48 is movably arranged in the piston chamber 402 . FIG. 6 shows a state in which the piston 48 is arranged in the standby position and the piston chamber 402 is closed. In a state where the hose 6 is attached to the second hydraulic device 4, the hydraulic chamber 401 is filled with oil. The threaded groove 421 is provided on the inner peripheral surface of the hose installation chamber 403 .

The oil from the first hydraulic device 2 passes through the hydraulic chamber 401 and pushes the piston 48 . Thereby, the two pistons 48 and the two brake pads 49 move relative to the housing 41 , and the two brake pads 49 sandwich the rotating body 13 . The rotating body 13 is, for example, a disc brake rotor installed on a wheel rim of a small vehicle. In this manner, the second hydraulic device 4 is provided with the brake pad 49 and the piston 48 that presses the brake pad 49 against the rotating body 13 . The wheel rim is braked by the friction generated between the brake pad 49 and the rotating body 13 . In other words, the second hydraulic device 4 is a disc brake device that brakes the disc brake rotor as the rotating body 13 . Furthermore, the rotating body 13 is not limited to a rotor, and may also be a rim of a wheel rim. That is, the second hydraulic device 4 may be a rim brake device that brakes the rim of the rim as the rotating body 13 .

As shown in FIG. 2 , the needle 45 is mounted on the housing 41 . The needle 45 is provided between the piston chamber 402 and the hose installation chamber 403 . The needle 45 has a communication hole connecting the piston chamber 402 and the hose installation chamber 403. In the hydraulic chamber 401, oil can move between the piston chamber 402 and the hose mounting chamber 403 via the needle 45. The needle 45 has the same structure as the needle 25 described above.

As shown in FIG. 2 , the threaded sleeve joint 46 is installed on the housing 41 . A threaded sleeve joint 46 is inserted into the hydraulic chamber 401 . One end of the threaded sleeve joint 46 is disposed inside the hydraulic chamber 401 . Threaded sleeve The other end of the pipe joint 46 is arranged outside the housing 41 . The threaded casing joint 46 is cylindrical. The threaded sleeve joint 46 has a threaded groove 461 on the outer peripheral surface. The threaded groove 461 is engaged with the threaded groove 421 of the hose installation chamber 403 . Furthermore, the threaded sleeve joint 46 may be multi-threaded. Thereby, the axial movement amount of the threaded sleeve joint 46 when rotated by a unit angle is increased.

As shown in FIG. 2 , the bushing 47 is arranged in the hose installation chamber 403 in the hydraulic chamber 401 . The bushing 47 is cylindrical. The bushing 47 is formed of, for example, copper or a copper alloy, but is not limited thereto. One end of the bushing 47 is connected to the inner peripheral surface of the hose installation chamber 403. The other end of the bushing 47 is connected to the end surface of the threaded casing joint 46. When the threaded sleeve joint 46 is rotated to enter the hydraulic chamber 401, the bushing 47 is pushed and deformed.

As shown in FIG. 2 , the hose 6 is a member that connects the first hydraulic device 2 and the second hydraulic device 4 . The hose 6 transmits changes in the hydraulic pressure generated by the first hydraulic device 2 to the second hydraulic device 4 . As shown in FIGS. 2 and 4 , the hose 6 includes a hose body 61 , an attachment member 65 , and a membrane 66 .

The hose body 61 is a flexible tubular member. The hose body 61 is formed of synthetic resin, for example, but is not limited thereto. The hose body 61 is equipped with a flow path 611 as shown in FIG. 2 . The flow path 611 is filled with oil. One end of the hose body 61 is inserted into the hydraulic chamber 201 of the first hydraulic device 2 . The other end of the hose body 61 is inserted into the hydraulic chamber 401 of the second hydraulic device 4 .

The mounting member 65 is mounted on the end of the hose body 61 . The mounting member 65 is inserted into the hose body 61 from the opening at the end of the hose body 61 . The rigidity of the mounting member 65 is higher than that of the hose body 61 . Specifically, the Young's modulus of the mounting member 65 is greater than the Young's modulus of the hose body 61 . install The mounting member 65 contains metal. Examples of the metal include copper, copper alloys, and the like. Alternatively, the mounting member 65 contains synthetic resin. The mounting member 65 includes a main body part 651 and a flange part 652. The main body part 651 is substantially cylindrical and is in contact with the inner peripheral surface of the hose body 61 . The flange portion 652 is located at the end of the body portion 651 and is connected to the end surface of the hose body 61 .

As shown in FIG. 4 , the membrane 66 covers the opening of the mounting member 65 . The membrane 66 is attached to the flange portion 652 . The membrane 66 is in close contact with the flange portion 652 to suppress oil leakage from the opening of the mounting member 65 .

As shown in FIGS. 5 and 6 , the first hydraulic device 2 and the second hydraulic device 4 include plugs 7 . The first hydraulic device 2 (second hydraulic device 4) includes a housing 21 (housing 41) having a hydraulic chamber 201 (hydraulic chamber 401) and in which the plug 7 is mounted. The plug 7 suppresses oil leakage inside the first hydraulic device 2 and the second hydraulic device 4 .

The plug 7 is used in the hydraulic device (the first hydraulic device 2 or the second hydraulic device 4) of small vehicles including bicycles. As shown in FIG. 7 , the plug 7 includes a body 71 , a flow path 73 , and a cover 75 . The main body 71 is arranged in the opening of the hydraulic chamber 201 provided in the first hydraulic device 2 (the hydraulic chamber 401 provided in the second hydraulic device 4). The flow path 73 is provided in the main body 71 so as to fluidly communicate with the hydraulic chamber 201 (hydraulic chamber 401). The cover 75 covers the end of the flow path 73 on the opposite side to the hydraulic chamber 201 (hydraulic chamber 401 ).

The cover 75 is integrally provided with the main body 71 . For example, the main body 71 and the cover 75 are integrally formed using synthetic resin. The cover 75 contains synthetic resin. The main body 71 contains synthetic resin. The cover 75 is formed in a rod shape protruding from the end surface of the body 71 on the side opposite to the hydraulic chamber 201 (hydraulic chamber 401 ). For example, cover 75 Is cylindrical. The cross-sectional area of the cover 75 in a cross-section orthogonal to the axial direction of the body 71 is larger than the cross-sectional area of the flow path 73 in the cross-section. Viewed from the axial direction of the main body 71 , the cover 75 overlaps the entire surface of the flow path 73 . Furthermore, the shape of the cover 75 is not limited to a cylindrical shape.

The cover 75 is configured to be at least partially detachable from the body 71 . The end of the flow path 73 on the opposite side to the hydraulic chamber 201 (hydraulic chamber 401) is opened by the lid 75 being pushed in a direction different from the direction away from the hydraulic chamber 201 (hydraulic chamber 401). constituted in a manner. When the cover 75 is pushed in the radial direction of the body 71 (the direction orthogonal to the axial direction), the cover 75 is plastically deformed. As shown in FIG. 8 , the end of the cover 75 on the main body 71 side is separated from the main body 71 . Thereby, the end of the flow path 73 on the side opposite to the hydraulic chamber 201 (hydraulic chamber 401) is opened.

As shown in FIG. 7 , the plug 7 is provided with a sealing member 77 provided on the main body 71 so as to face the first hydraulic device 2 (the second hydraulic device 4). The sealing member 77 is annular and formed of, for example, synthetic rubber. The sealing member 77 is embedded in an annular recess 711 provided on the outer peripheral surface of the body 71 .

When the hose 6 is connected to the first hydraulic device 2, first, the cover 75 of the plug 7 of the first hydraulic device 2 is detached. Thereby, the flow path 73 of the plug 7 is opened. Thereafter, the plug 7 is pulled out from the first hydraulic device 2 . Since the flow path 73 is opened, oil splashing when the plug 7 is pulled out is suppressed. Thereafter, one end of the hose 6 is inserted into the hydraulic chamber 201 of the first hydraulic device 2 . The needle 25 ruptures the membrane 66 so that the piston chamber 202 of the first hydraulic device 2 communicates with the flow path 611 of the hose 6 . Thereafter, as the threaded sleeve joint 26 is rotated, the bushing 27 is deformed and bitten into the hose body 61 . Thereby, the hose 6 is fixed to the first hydraulic device 2 .

When the hose 6 is connected to the second hydraulic device 4, first, the cover 75 of the plug 7 of the second hydraulic device 4 is detached. Thereby, the flow path 73 of the plug 7 is opened. Thereafter, the plug 7 is pulled out from the second hydraulic device 4 . Since the flow path 73 is opened, oil splashing when the plug 7 is pulled out is suppressed. Thereafter, the other end of the hose 6 is inserted into the hydraulic chamber 401 of the second hydraulic device 4 . The needle 45 ruptures the membrane 66 so that the piston chamber 402 of the second hydraulic device 4 and the flow path 611 of the hose 6 are connected. Thereafter, the threaded sleeve joint 46 is rotated, causing the bushing 47 to deform and bite into the hose body 61 . Thereby, the hose 6 is fixed to the 2nd hydraulic device 4.

Fig. 9 is a schematic diagram of the braking system of the embodiment during transportation. Figure 10 is a perspective view of the hose of the embodiment before being connected to the hydraulic device. As shown in FIG. 9 , when the hose 6 is transported, the hose 6 is placed in the box 100 while being connected to the second hydraulic device 4 , for example. The box 100 is provided with a support member 101. As shown in FIG. 9 , the hose 6 is hung from the support member 101 in such a manner that the hose body 61 is not wrapped around the entire circumference of the support member 101 . Thereby, the hose 6 is less likely to become entangled.

As shown in FIG. 10 , before being connected to the first hydraulic device 2 and the second hydraulic device 4 , the hose 6 is provided with a cap 68 and a rope 69 . The cap 68 protects the end of the hose 6 . When the hose 6 is installed on the bicycle frame, the hose 6 is sometimes passed through the inside of the frame. In this case, the member previously provided on the vehicle frame in order to allow the hose 6 to pass through is connected to the rope 69 installed in the hole 681 of the cover 68 . Furthermore, the rope 69 is pulled to allow the cover 68 to enter the interior of the vehicle frame. In this embodiment, the surface of the cover 68 is coated with low friction. Thereby, the movement of the hose 6 inside the frame becomes smooth.

(Example of variation)

Fig. 11 is an enlarged view of the periphery of the plug according to the modified example. As shown in Figure 11, the modified plug 7A has a cover 75A different from the cover 75 described above. In addition, the same structure as that of the above-mentioned embodiment is attached|subjected with the same code, and description is abbreviate|omitted.

The cover 75A is integrally provided with the main body 71 . For example, the main body 71 and the cover 75A are integrally molded using synthetic resin. Cover 75A contains synthetic resin. The cover 75A and the end surface of the main body 71 on the side opposite to the hydraulic chamber 201 (hydraulic chamber 401) are integrated. That is, the cover 75A does not protrude from the end surface of the main body 71 , but is formed as a part of the disc-shaped end surface of the main body 71 .

The cover 75A is configured to be at least partially detachable from the body 71 . The end of the flow path 73 on the side opposite to the hydraulic chamber 201 (hydraulic chamber 401) is opened by the lid 75A being pushed in a direction different from the direction away from the hydraulic chamber 201 (hydraulic chamber 401). constituted in a manner. When the cover 75A is pushed in the direction toward the hydraulic chamber 201 (hydraulic chamber 401), the cover 75A is plastically deformed. Specifically, the cover 75A is plastically deformed and enters the inside of the flow path 73 . Thereby, the end of the flow path 73 on the side opposite to the hydraulic chamber 201 (hydraulic chamber 401) is opened. For example, in order to deform the cover 75A, a tool with a sharp front end is used.

The embodiments of the present invention have been described above, but the embodiments are not limited by the contents of these embodiments. In addition, the above-mentioned constituent elements include elements that are easily imagined by the industry, elements that are substantially the same, and elements that are within the so-called equivalent scope. Furthermore, the above-described constituent elements can be combined appropriately. Furthermore, various omissions, substitutions, or changes may be made to the constituent elements without departing from the gist of the above-described embodiments.

7‧‧‧Plug

22‧‧‧Cylinder

25‧‧‧Needles

26‧‧‧Threaded casing joint

27‧‧‧ Bushing

71‧‧‧Ontology

73‧‧‧Flow path

75‧‧‧Cover

77‧‧‧Sealing components

201‧‧‧Hydraulic room

202‧‧‧Piston chamber

203‧‧‧Hose installation room

221‧‧‧Thread groove

261‧‧‧Thread groove

711‧‧‧Concave

Claims (10)

A plug for use in a hydraulic device of a small vehicle including a bicycle, and is provided with: a body disposed in an opening of a hydraulic chamber of the hydraulic device; and a flow path fluidly connected to the above-mentioned hydraulic device. The hydraulic chamber is connected to the main body; and a cover covers the end of the flow path on the opposite side to the hydraulic chamber, wherein the cover is configured to be at least partially detachable from the main body. The plug of claim 1, wherein the cap is pushed in a direction different from the direction away from the hydraulic chamber to open an end of the flow path on the side opposite to the hydraulic chamber. way of composition. The plug according to claim 1 or 2, wherein the cover is formed in a rod shape protruding from an end surface of the body opposite to the hydraulic chamber. The plug of claim 1 or 2, wherein the cover contains synthetic resin. The plug of claim 1 or 2, wherein the body contains synthetic resin. The plug of claim 1 or 2 further includes a sealing member provided on the body facing the hydraulic device. A hydraulic device provided with the plug according to any one of claims 1 to 6, and a housing having the above-mentioned hydraulic chamber and for mounting the above-mentioned plug. The hydraulic device of claim 7 further includes a control rod and a piston that is actuated according to the operation of the control rod. The hydraulic device of claim 7 further includes a brake pad and a piston that presses the brake pad against the rotating body. A plug for use in a hydraulic device of a small vehicle including a bicycle, and is provided with: a body disposed in an opening of a hydraulic chamber of the hydraulic device; and a flow path fluidly connected to the above-mentioned hydraulic device. The hydraulic chamber is provided on the main body in a communication manner; and a cover covers the end of the flow path on the opposite side to the hydraulic chamber, wherein the cover is integrally provided on the main body.