JP4422663B2 - Reservoir for hydraulic master cylinder for vehicle and method for manufacturing the same - Google Patents

Description

  The present invention relates to a reservoir for a hydraulic master cylinder for a vehicle formed by welding a lower reservoir half and an upper reservoir half, and a method for manufacturing the same, and more particularly, a reservoir union that connects the hydraulic master cylinder and the reservoir body. The present invention relates to a reservoir of a hydraulic master cylinder for a vehicle including

Conventionally, a reservoir body or reservoir union that stores hydraulic fluid is formed by welding a lower half of a reservoir made of a synthetic resin and an upper half of a reservoir, and in order to partition a hydraulic fluid storage chamber. And a plurality of reinforcing ribs are provided (see, for example, Patent Documents 1 and 2).
JP 2004-243853 A Japanese Utility Model Publication No. 6-35071

  In the above, when the reservoir lower half and the reservoir upper half are welded, the rib half formed on the reservoir lower half and the rib half formed on the reservoir upper half are welded simultaneously to Although partition ribs and reinforcing ribs are formed, at this time, since both halves are welded while pressing the outer peripheral sides of both reservoir halves, the outer peripheral side of the reservoir halves is welded well, Since no force is applied to the rib half formed on the lower reservoir half and the rib half formed on the upper reservoir half, the two rib halves may not be welded reliably.

  Therefore, an object of the present invention is to provide a reservoir for a hydraulic master cylinder for a vehicle in which a lower reservoir half, an upper reservoir half, and a rib half are welded in good condition.

To achieve the above object, a first invention is for a vehicle formed by welding a reservoir lower half having a lower rib half inside and a reservoir upper half having an upper rib half inside. In the reservoir of the hydraulic master cylinder, on the outer surface of the rib forming position of the reservoir lower half and the reservoir upper half, at least a pressing flat portion formed in a shape corresponding to the rib half is formed . The flat part of the upper half of the reservoir is a rib protruding from the outer surface of the upper half of the reservoir, and the flat part of the upper half of the reservoir has a pressing surface orthogonal to the pressing direction. It is characterized by that.

According to a second aspect of the invention, there is provided a reservoir for a vehicle hydraulic master cylinder formed by welding a reservoir lower half having a lower rib half inside and a reservoir upper half having an upper rib half inside. In the manufacturing method, a pressing flat portion formed in a shape corresponding to at least the rib half is provided on the outer surface of the rib forming position of the lower reservoir half and the upper rib half, respectively , The flat portion is formed by a rib projecting from the outer surface of the upper half of the reservoir, and the flat portion of the upper half of the reservoir is provided with a pressing surface perpendicular to the pressing direction, and the lower half of the reservoir And the upper half of the reservoir, the lower rib half and the upper rib half are welded while pressing the flat portions toward the inside of the reservoir.

In the first invention, since the flat portion formed by the rib is pressed to weld the upper rib half and the lower rib half, the outer surface of the reservoir half is not pressed directly, so the reservoir half is welded There is no risk of deformation at times.

In the second invention, the flat portion formed by the rib is pressed and the upper rib half and the lower rib half are welded, so the outer surface of the reservoir half is not pressed directly, so the reservoir half is welded There is no risk of deformation at times, and the upper half of the reservoir, the lower half of the reservoir, and the rib formed inside the reservoir can be reliably and easily welded.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a cross-sectional front view of main parts of a reservoir union corresponding to a reservoir of the present invention and a hydraulic master cylinder showing an embodiment of the present invention, FIG. 2 is a front view of the reservoir union, FIG. 3 is a plan view of the reservoir union, 4 is a view taken along arrow IV-IV in FIG. 2, and FIG. 5 is a view taken along arrow VV in FIG.

  The reservoir union 1 is attached to the hydraulic master cylinder 2 of the vehicle disc brake. The union coupling bosses 2b and 2c formed on the cylinder body 2a and the hose connected to the reservoir body (both shown in FIG. The hydraulic fluid is supplied into the hydraulic master cylinder 2 from the reservoir body through the hose and the reservoir union 1.

  The hydraulic master cylinder 2 is a tandem type in which two hydraulic chambers (not shown) are defined inside the cylinder body 2a, and the hydraulic fluid boosted in these hydraulic chambers is individually supplied to the two brake systems. Output ports 2d and 2e connected to the hydraulic chamber are provided on one side of the body 2a. The cylinder body 2a has union coupling bosses 2b and 2c projecting at two locations on the upper surface, and a plate-like union coupling unit 2f projecting between the union coupling bosses 2b and 2c. Each of the union coupling bosses 2b and 2c is formed in a cylindrical shape having a fitting hole 2g therein, and the fitting hole 2g and the inside of the cylinder body 2a communicate with each other through a communication hole.

  The reservoir union 1 includes body connecting boss portions 1a and 1b that fit into the union connecting boss portions 2b and 2c of the cylinder body 2a, and a plate-like body connecting portion 1c that is connected to the union connecting portion 2f. A cylindrical hose connection portion 1d for connecting a hose formed and connected to the reservoir body is formed at the top. Further, the reservoir union 1 extends from the intermediate position of the body connecting bosses 1a and 1b onto the central axis of the hose connecting part 1d so that the inside of the reservoir union 1 has two liquid chambers 1e, A partition rib 1g that is partitioned into 1f is formed, one body connecting boss 1a is provided in one liquid chamber 1e, and the other body connecting boss 1b is provided in the other liquid chamber 1f. Yes.

  The reservoir union 1 is formed by welding a bottomed reservoir lower half 3 whose top is open and a reservoir upper half 4 having a lower end opening corresponding to the upper end opening of the reservoir lower half 3 to each other. Is done.

  The reservoir lower half 3 is integrally provided with the body connecting bosses 1a, 1b and the body connecting portion 1c, and a thick lower rib half 3a is formed inside the reservoir lower half 3a so as to form a lower part of the partition rib 1g. The outer surface of the reservoir lower half 3 corresponding to the rib half 3a is a first flat portion 3b formed in a flat shape. In addition, a flange portion 3c that projects outward is provided at the upper opening of the reservoir lower half 3.

  The reservoir upper half 4 is integrally formed with the hose connecting portion 1d, and is formed in a substantially chevron shape with the central portion of the upper surface raised. A thin upper rib half 4a is formed in the reservoir upper half 4 at a position corresponding to the lower rib half 3a. On the outer surface of the reservoir upper half 4 corresponding to the rib half 4a, A second flat portion 4 b is provided, and a flange portion 4 c that projects outward is provided in the lower opening of the reservoir upper half 4. The second flat portion 4b is formed with a rib that is slightly thicker than the upper rib half 4a and protrudes from the outer surface of the reservoir upper half 4. When the reservoir halves 3 and 4 are welded, the second flat portion 4b is formed. A pressing surface 4d orthogonal to the pressing direction is provided.

  FIG. 6 is an explanatory view showing the manufacturing process of the reservoir union. The reservoir lower half 3 and the reservoir upper half 4 abut each other between the flange portions 3c, 4c, and the upper surface of the lower rib half 3a and the upper rib half. The flanges 3c and 4c are pressed against each other by the pressing tools 5 and 6, and the first flat part 3b and the second flat part 4b are pressed toward the inside of the reservoir by the pressing tools 7 and 8, respectively. However, the flange portions 3c, 4c, the lower rib half 3a, and the upper rib half 4a are welded.

  As described above, the first flat portion 3b is provided on the outer surface of the reservoir lower half 3 corresponding to the lower rib half 3a, and the second flat portion 4b is provided on the outer surface of the reservoir upper half 4 corresponding to the upper rib half 4a. At the same time, when the reservoir union is manufactured, the reservoir lower half 3 and the reservoir upper half 4 are welded while pressing the first flat portion 3b and the second flat portion 4b toward the inside of the reservoir with the pressing tools 7 and 8, respectively. Therefore, the lower rib half 3a and the upper rib half 4a can be reliably welded. Further, since the thickness of the lower rib half 3a is made larger than the thickness of the upper rib half 4a, the tolerance between the lower rib half 3a and the upper rib half 4a can be absorbed and welded well. Can do. Furthermore, since the second flat portion 4b is formed by a rib protruding from the outer surface of the reservoir upper half 4 and the pressing surface 4d is pressed by the pressing tool 8, the outer surface of the reservoir upper half 4 is directly pressed during welding. There is no possibility that the reservoir upper half 4 is deformed.

  The present invention is not limited to the one applied to the reservoir union as in the above-described embodiments, and can be applied to the reservoir body. Further, a reinforcing rib is provided inside the reservoir union or the reservoir body. It can be applied to those provided. Further, the first flat portion formed in the lower reservoir half may be formed in a rib shape protruding from the outer surface of the lower reservoir half.

It is a principal section sectional front view of a reservoir union and a hydraulic master cylinder which show one example of the present invention. It is a front view of a reservoir union similarly. It is a top view of a reservoir union similarly. It is the IV-IV arrow line view of FIG. FIG. 5 is a view taken along arrow V-V in FIG. 2. It is explanatory drawing which similarly shows the manufacturing process of a reservoir union.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Reservoir union, 1a, 1b ... Boss part for body connection, 1c ... Body connection part, 1d ... Hose connection part, 1e, 1f ... Liquid chamber, 1g ... Rib for partition, 2 ... Hydraulic master cylinder, 2a ... Cylinder Body, 2b, 2c ... Union boss part, 2d, 2e ... Output port, 2f ... Union connection part, 2g ... Fitting hole, 3 ... Reservoir lower half, 3a ... Lower rib half, 3b ... First flat part, 3c ... flange portion, 4 ... reservoir upper half, 4a ... upper rib half, 4b ... second flat portion, 4c ... flange portion, 4d ... pressing surface, 5, 6, 7, 8 ... pressing tool

Claims (2)

In a reservoir of a hydraulic master cylinder for a vehicle formed by welding a reservoir lower half having a lower rib half inside and a reservoir upper half having an upper rib half inside, the reservoir lower half And a flat portion for pressing formed in a shape corresponding to at least the rib half on the outer surface of the rib forming position of the upper half of the reservoir, and the flat portion of the upper half of the reservoir A reservoir for a hydraulic master cylinder for a vehicle , wherein the reservoir is a rib protruding from the outer surface of the half, and a flat surface of the upper half of the reservoir is provided with a pressing surface orthogonal to the pressing direction. . In a manufacturing method of a reservoir of a hydraulic master cylinder for a vehicle, which is formed by welding a reservoir lower half having a lower rib half inside and a reservoir upper half having an upper rib half inside, A pressing flat portion formed in at least a shape corresponding to the rib half is provided on the outer surface of the rib forming position of the reservoir half and the upper rib half, and the flat portion of the upper half of the reservoir is provided in the reservoir. A rib protruding from the outer surface of the upper half, and a flat surface of the upper half of the reservoir is provided with a pressing surface orthogonal to the direction of pressing, the lower reservoir half and the upper reservoir half when welding the said while pressing towards each flat portion in the reservoir interior, Li of the lower rib half and the upper rib half the vehicle hydraulic master cylinder, characterized in that welding the Method of manufacturing over server.

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