JP5758324B2 - Hydraulic master cylinder reservoir - Google Patents

Description

  The present invention relates to a reservoir for storing hydraulic fluid for operating a hydraulic master cylinder of a motorcycle or a motorized three- or four-wheeled vehicle. More specifically, the present invention communicates with a hydraulic master cylinder when air is released from a hydraulic path. The present invention relates to a reservoir of a hydraulic master cylinder provided with a protector that prevents hydraulic fluid from blowing up into the reservoir from a relief port.

  Conventionally, in a hydraulic master cylinder in which a reservoir is integrally formed at the top of a cylinder body, the reservoir is attached to a reservoir body that stores hydraulic fluid in a liquid storage chamber, and an upper rim of the reservoir body via a diaphragm. And a cap having a cover body. The cylinder hole and the liquid storage chamber communicate with each other through the relief port and the supply port, and the hydraulic fluid in the liquid storage chamber is replenished to the cylinder hole as needed, or the hydraulic fluid in the cylinder hole is returned to the liquid storage chamber. In such a hydraulic master cylinder, when the air is released from the hydraulic path, the hydraulic fluid may blow up from the relief port of the reservoir into the reservoir, and in order to prevent this, the reservoir has a relief port. Some have a protector that covers the top. Furthermore, some reservoirs have a confirmation window for visually recognizing the amount of hydraulic fluid stored therein (see, for example, Patent Document 1).

JP 2007-106238 A

  However, in the above-mentioned patent document, since a protector and a confirmation window must be attached to the reservoir, the number of parts is increased and the assembly is troublesome. Furthermore, when evacuating the hydraulic path when filling the hydraulic fluid, the diaphragm may be pulled toward the bottom of the reservoir, the bellows may extend and the relief port or supply port may be blocked, and the protector is detached from the mounting portion. There was a fear.

  Accordingly, an object of the present invention is to provide a reservoir of a hydraulic master cylinder that can reduce the number of parts and can perform evacuation of a hydraulic path satisfactorily.

  In order to achieve the above object, the reservoir of the hydraulic master cylinder of the present invention is disposed above the cylinder hole of the hydraulic master cylinder and communicates with the cylinder hole via a relief port and a supply port, A cap attached to the upper rim of the reservoir body via a diaphragm and a window opening formed in the side wall of the reservoir body are attached to visually check the amount of hydraulic fluid stored in the reservoir body. In a reservoir of a hydraulic master cylinder that is provided above a confirmation window and a protector that is disposed above the relief port and prevents the hydraulic fluid from blowing up, the upper part of the relief port is covered inside the lower part of the confirmation window. It is characterized by the integrated protector.

  The protector includes a parallel part extending in parallel to the bottom of the liquid storage chamber from the inside of the confirmation window, a descending part extending from the tip of the parallel part toward the bottom of the liquid storage chamber, It is preferable that a cover portion that is formed at the tip of the descending portion and covers the relief port is provided. Furthermore, it is preferable to form the descending portion with an inclined surface. The protector preferably includes a reinforcing rib.

  According to the reservoir of the hydraulic master cylinder of the present invention, the protector is integrally formed inside the lower part of the confirmation window, so that the number of parts can be reduced and the labor for assembling can be reduced, thereby reducing the cost. Can be achieved. Furthermore, it is possible to prevent the protector from being detached.

  In addition, when vacuuming the hydraulic path, even if the bellows of the diaphragm extends to the bottom of the liquid storage chamber, the protector can prevent the relief port and supply port from being blocked, ensuring that the hydraulic path is evacuated. Can be done.

  In addition, the protector covers a parallel part extending in parallel with the bottom of the liquid storage chamber from the inside of the confirmation window, a descending part extending from the tip of the parallel part toward the bottom of the liquid storage chamber, and the upper part of the relief port. Therefore, when the air is released from the hydraulic path by the cover, the hydraulic fluid is prevented from blowing up from the relief port of the reservoir into the reservoir. When vacuuming, the relief port and supply port can be prevented from being blocked by the bellows of the diaphragm.

  Furthermore, since the descending portion is formed of an inclined surface, the descending portion can be easily formed. Moreover, the strength of the protector can be improved by providing the protector with a reinforcing rib.

It is II sectional drawing of FIG. It is a partial cross section top view of the hydraulic master cylinder which shows one example of the present invention. FIG. 3 is a sectional view taken along line III-III in FIG. 1. It is a side view of a hydraulic master cylinder similarly. It is a perspective view of the confirmation window similarly provided with the protector.

  The hydraulic master cylinder 1 for a vehicle according to this embodiment is used for a front brake of a bar handle vehicle, and a reservoir 3 is formed integrally with an upper portion of a cylinder body 2. The cylinder body 2 is provided with a bottomed cylinder hole 2a opened at one end. The piston 4 is movably inserted in the cylinder hole 2a, and the piston 4 is moved by the piston actuator 5 toward the bottom of the cylinder hole 2a. The hydraulic pressure is generated in the hydraulic pressure chamber 6.

  The reservoir 3 is formed in a rectangular parallelepiped shape, and includes a reservoir main body 7 that stores the hydraulic fluid F in the liquid storage chamber 7a, and a cap 9 that is attached to the upper rim 7b of the reservoir main body 7 via the diaphragm 8. The cap 9 includes a cover body 9a at the center. The cylinder body 2 and the reservoir body 7 are integrally formed of cast iron, aluminum alloy, or the like, and the cylinder hole 2a and the liquid storage chamber 7a are formed by a relief port 10 and a supply port 11 provided side by side in the cylinder axial direction. The hydraulic fluid F in the liquid storage chamber 7a is supplied to the cylinder hole 2a as needed, or the hydraulic fluid F in the cylinder hole 2a is returned to the liquid storage chamber 7a. In addition, a window opening 7d is formed in the side wall 7c of the reservoir body 7 on the piston actuator side, and the amount of the working fluid F is visually recognized in the window opening 7d and the upper part of the relief port 10 is covered. A confirmation window 12 with a protector for preventing the hydraulic fluid F from blowing up is mounted.

  The window opening 7d includes a cylindrical outer opening 7e that opens to the outside of the reservoir body 7, an inner opening that opens to the outer opening 7e and the inside of the reservoir body, and has a smaller opening area than the outer opening 7e. Part 7f. The inner opening 7f has an opening shape that is vertically long and short in the horizontal direction, and has a substantially scoop shape with the upper half spread over the fan. The width of the upper end is larger than the width of the lower end. Formed long.

  The confirmation window 12 with a protector is formed of a transparent member integrally including a confirmation window 12a and a protector 12b, and is attached to a window opening 7d formed on the side wall 7c of the reservoir body 7. The confirmation window 12a protrudes from the cylindrical portion 12c fitted inside the outer opening 7e, a disc portion 12d that closes one end surface of the cylindrical portion 12c, and the other end surface of the cylindrical portion 12c, and the inner opening 7f. An upper engaging piece 12e having a width corresponding to the upper end of the inner opening 7f and a lower engaging piece 12f having a width corresponding to the lower end of the inner opening 7f. Engaging portions 12g and 12h that engage with the inner surface of the reservoir body 7 are formed at the tip ends of 12e and 12f, respectively. Further, the cylindrical portion 12c is provided with a seal groove 12i for mounting the sealing material 13, and the disc portion 12d is provided with an index 12k serving as a guide for visually recognizing the liquid level of the working fluid F. ing. Further, on the inner peripheral side of the cylindrical portion 12c, reinforcing ribs 12m and 12n that are continuous with the inner side surface of the upper engaging piece 12e and the inner side surface of the lower engaging piece 12f are formed. . The confirmation window 12 with protector is attached to the side wall 7c of the reservoir body 7 by attaching the confirmation window 12a thus formed to the window opening 7d.

  The protector 12b is formed continuously from the lower engaging piece 12f, and extends in parallel to the bottom 7g of the liquid storage chamber 7a, and from the tip of the parallel portion 12p to the bottom of the liquid storage chamber 7a. A downwardly extending portion 12q extending toward the bottom, and a leading end parallel portion 12r (covering portion of the present invention) extending from the leading end of the descending portion 12q in parallel with the bottom portion 7g of the liquid storage chamber 7a. The parallel portion 12p extends to the front of the supply port 11 close to the confirmation window 12a, and the descending portion 12q is disposed above the supply port 11. The tip parallel part 12r is disposed above the relief port 10, and a space is formed between the relief port 10 and the tip parallel part 12r. In addition, a reinforcing rib 12s is formed on the upper surface of the parallel portion 12p in continuation with the reinforcing rib 12n formed on the inner surface of the lower engaging piece 12f. Reinforcing ribs 12t are formed across the bottom surface of the base end side of the portion 12q.

  Assembling the confirmation window 12 with the protector attaches the sealing material 13 to the seal groove 12i, and inserts the protector 12b downward into the window opening 7d. Next, the upper engagement piece 12e and the lower engagement piece 12f of the confirmation window 12a are inserted into the window opening 7d while being bent toward the inner peripheral side of the cylindrical portion 12c, and the upper engagement piece is inserted. 12e is engaged with the upper half of the inner opening 7f of the window opening 7d, and the lower engagement piece 12f is engaged with the lower half of the inner opening 7f of the window opening 7d. As a result, the confirmation window 12a is securely and liquid-tightly attached to the window opening 7d at the predetermined position of the outer opening 7e via the seal material 13, and the indicator 12k of the disk part 12d is arranged in an appropriate direction. . Thereby, the descending portion 12q of the protector 12b is disposed above the supply port 11, and the tip parallel portion 12r is disposed above the relief port 10, respectively. Further, by this assembly, the hydraulic fluid F can flow inside the cylindrical portion 12 c, and the liquid level of the hydraulic fluid F can be confirmed from the outside of the reservoir 3.

  As for the confirmation window 12 with a protector formed as described above, the protector 12b and the confirmation window 12a are integrally formed, so that the number of parts can be reduced and the assembling process does not take time. Therefore, cost reduction can be achieved. Furthermore, it is possible to prevent the protector 12b from falling off.

  Further, when the air is released from the hydraulic path, since the tip parallel part 12r of the protector 12b is disposed above the relief port 10, the hydraulic fluid blows up from the relief port 10 of the reservoir into the reservoir. This can be prevented. Further, when the hydraulic path is evacuated when the hydraulic fluid is filled, even if the diaphragm 8 is pulled to the bottom side of the reservoir 3 and the bellows is extended, the supply port 11 and the relief port 10 are separated by the inclined surface of the descending portion 12q. It is possible to prevent the supply port 11 and the relief port 10 from being blocked by securing a space portion between them. Thereby, vacuuming can be performed reliably and the hydraulic fluid F can be satisfactorily filled in the hydraulic path. Further, the protector 12b is provided with the reinforcing ribs 12m and 12n, so that the strength can be improved.

  In addition, this invention is not restricted to the above-mentioned form example, The fall part of a protector can also be formed in a step shape, and the shape of a cover part is also arbitrary. Furthermore, the shape of the confirmation window and the formation position of the confirmation window are also arbitrary.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle hydraulic master cylinder, 2 ... Cylinder body, 2a ... Cylinder hole, 3 ... Reservoir, 4 ... Piston, 5 ... Piston actuator, 6 ... Hydraulic pressure chamber, 7 ... Reservoir main body, 7a ... Liquid storage chamber, 7b: Upper lip, 7c: Side wall, 7d: Opening for window, 7e ... Outer opening, 7f ... Inner opening, 7g ... Bottom, 8 ... Diaphragm, 9 ... Cap, 9a ... Cover body, 10: Relief port 11 ... Supply port, 12 ... Confirmation window with protector, 12a ... Confirmation window, 12b ... Protector, 12c ... Cylindrical part, 12d ... Disc part, 12e, 12f ... Locking piece, 12g, 12h ... Engagement part, 12i ... seal groove, 12k ... index, 12m, 12n ... reinforcing rib, 12p ... parallel part, 12q ... descending part, 12r ... tip parallel part (covering part), 12s, 12t ... reinforcing rib, 13 ... sealing material

Claims (4)

A reservoir body that is disposed above the cylinder hole of the hydraulic master cylinder and communicates with the cylinder hole via a relief port and a supply port; and a cap that is attached to the upper edge of the reservoir body via a diaphragm; A confirmation window that is attached to a window opening formed in a side wall of the reservoir body and visually recognizes the amount of the working fluid stored in the reservoir body, and is disposed above the relief port, A reservoir for a hydraulic master cylinder comprising a protector for preventing a rise, wherein a protector for covering the upper part of the relief port is integrally formed inside the lower portion of the confirmation window. The protector includes a parallel portion extending in parallel with the bottom of the liquid storage chamber from the inside of the confirmation window, a descending portion extending from the tip of the parallel portion toward the bottom of the liquid storage chamber, and the descending portion The reservoir of the hydraulic master cylinder according to claim 1, further comprising: a cover portion formed at a distal end portion of the cylinder and covering an upper portion of the relief port. The reservoir of a hydraulic master cylinder according to claim 2, wherein the descending portion is formed of an inclined surface. The reservoir of a hydraulic master cylinder according to any one of claims 1 to 3, wherein the protector includes a reinforcing rib.

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