TWM527845U - Oil storage tank for bicycle oil pressure operating device and bicycle oil pressure operating device with the oil storage tank - Google Patents

Description

Oil storage tank for bicycle hydraulic operating device, and bicycle hydraulic operating device having the same

The present invention relates to an oil storage tank for a bicycle hydraulic operating device and a bicycle hydraulic operating device including the oil storage tank.

The oil storage tank for a bicycle hydraulic operating device includes, for example, a tank main body, a top plate, a diaphragm, and a sealing member. The operating oil for supplying the bicycle hydraulic operating device is stored in the tank main body. The sealing member is disposed between the groove main body and the top plate and has a function of sealing the elements. The diaphragm is disposed in the tank body and has a function of being deformed in response to a change in volume of the operating oil stored in the tank body.

By further improving the sealing performance of the oil storage tank for the bicycle hydraulic operating device, for example, it is possible to reduce the frequency at which maintenance of the bicycle hydraulic operating device is required. Therefore, there is a need for an oil storage tank for a bicycle hydraulic operating device having a higher sealing property.

An object of the present invention is to provide an oil storage tank for a bicycle hydraulic operating device having a higher sealing property, and a bicycle hydraulic operating device including the oil storage tank.

[1] The oil storage tank for a bicycle hydraulic operating device according to the first aspect of the present invention includes: a groove main body, a top plate, and a sealing member; the groove main body includes an end surface, a support protrusion extending from the end surface, and the end surface a sealing reinforcing structure around the support protrusion; the top plate has a top plate hole for inserting the support protrusion; the sealing member has a sealing hole for inserting the support protrusion, and is disposed on the end surface of the groove main body and Between the above top plates.

[2] The oil storage tank for a bicycle hydraulic operating device according to the second aspect of the invention, wherein the seal reinforcing structure is provided at least partially on the end surface of the oil storage tank for the bicycle hydraulic operating device according to the above aspect The concave portion around the support protrusion.

[3] The oil storage tank for a bicycle hydraulic operating device according to the third aspect of the invention, wherein the recessed portion is formed in a ring shape so as to surround the support projection in the oil reservoir for the bicycle hydraulic operating device according to the above [2]. .

[4] The oil storage tank for a bicycle hydraulic operating device according to any one of the above aspects of the present invention, wherein the top plate hole has a a first opening having a diameter and being disposed closer to the groove body than the first opening The end face side has a second opening having a second diameter larger than the first diameter.

[5] The oil storage tank for a bicycle hydraulic operating device according to a fifth aspect of the present invention includes: a groove main body, a top plate, and a sealing member; the groove main body has an end surface and a support protrusion extending from the end surface; and the top plate has a top plate hole for inserting the support protrusion; the sealing member having a sealing hole for inserting the support protrusion, and disposed between the end surface of the groove main body and the top plate; the top plate hole having: a first diameter The first opening and the second opening having a second diameter larger than the first diameter are provided on the end surface side closer to the groove main body than the first opening.

[6] The oil storage tank for a bicycle hydraulic operating device according to any one of the above-mentioned [1] to [5], wherein the sealing member is disposed in the oil storage tank for a bicycle hydraulic operating device according to any one of the above aspects of the present invention. The diaphragm of the groove body is integrated.

[7] The oil storage tank for a bicycle hydraulic operating device according to any one of the above aspects of the present invention, wherein the sealing member further comprises: At least one of the first annular projection on the end surface side of the groove main body and the second annular projection provided on the top plate side around the seal hole is provided around the seal hole.

[8] The oil storage tank for a bicycle hydraulic operating device according to any one of the above aspects of the present invention, wherein the sealing member further comprises: in The portion on the end surface side of the groove main body is provided at least one of a first chamfered portion at an edge portion of the seal hole and a second chamfered portion provided at an edge portion of the seal hole at a portion on the top plate side.

[9] The oil storage tank for a bicycle hydraulic operating device according to any one of the above aspects of the present invention, wherein the support projection has a screw hole. The top plate has a support portion, and further includes a bolt having a screw portion that is screwed into the screw hole of the support protrusion and a head portion of the support portion that is disposed on the top plate.

[10] The bicycle oil pressure operating device of the tenth aspect of the present invention, comprising the oil storage tank for a bicycle hydraulic operating device according to any one of the above [1] to [9].

The bicycle hydraulic operating device and the oil storage tank thereof have higher sealing performance.

10‧‧‧Bicycle hydraulic operating device

30‧‧‧ oil storage tank

32‧‧‧ top board

32A‧‧‧Top hole

32B‧‧‧1st opening

32C‧‧‧2nd opening

32D‧‧‧Support

34‧‧‧Bolts

34A‧‧ Thread Department

34B‧‧‧ head

36‧‧‧Separator

38‧‧‧ Sealing members

38A‧‧‧ Sealed hole

38B‧‧‧1st chamfered part

38C‧‧‧2nd chamfering

38F‧‧‧1st annular protrusion

38G‧‧‧2nd annular protrusion

40‧‧‧ slot body

42C‧‧‧ end face

46‧‧‧Support protrusion

46A‧‧‧Threaded hole

48‧‧‧ Sealing and strengthening structure

48A‧‧‧ recess

Fig. 1 is a front elevational view of the bicycle hydraulic operating device of the embodiment.

Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1.

Fig. 3 is an enlarged cross-sectional view showing the circle 3 of Fig. 2;

Fig. 4 is a cross-sectional view showing a state in which the diaphragm of Fig. 3 is deformed.

(embodiment)

Referring to Fig. 1, a bicycle hydraulic operating device 10 of the present invention will be described. The bicycle hydraulic operating device 10 includes an oil storage tank for a bicycle hydraulic operating device of the present invention (hereinafter simply referred to as "oil storage tank 30"). The bicycle hydraulic operating device 10 is included in a bicycle hydraulic device (not shown). In one example, the bicycle hydraulic device has a function of applying a braking force to a disc mounted on a bicycle wheel. The components constituting the bicycle hydraulic device include at least a caliper and a hose (not shown) in addition to the bicycle hydraulic operating device 10. The caliper is attached to the frame of the bicycle (not shown). The hoses are respectively connected to the bicycle hydraulic operating device 10 and the calipers.

The bicycle hydraulic brake operating device, that is, the bicycle hydraulic operating device 10, supplies operating oil to the caliper by an operator's operation. When the oil pressure of the caliper increases, let the piston provided on the caliper press the brake slat toward the disc. This applies a braking force to the disc.

The bicycle hydraulic operating device 10 includes an apparatus main body 12, a mounting portion 14, a lever support portion 16, a lever 18, and an oil reservoir 30. The mounting portion 14 and the lever support portion 16 are integrally formed with the device body 12. The attachment portion 14 can be attached to a pipe member (not shown) of a bicycle such as a handlebar. The lever 18 is swingably provided to the lever support portion 16 with respect to the apparatus main body 12.

As shown in FIG. 2, the oil storage tank 30 is provided with a tank main body 40, a top plate 32, at least one bolt 34, a diaphragm 36, and at least one dense Sealing member 38. In one example, the oil sump 30 is provided with three bolts 34 (refer to Fig. 1).

The tank body 40 has a side wall 42, a bottom wall 44, at least one support protrusion 46, and an oil chamber 40A. The oil chamber 40A includes a space surrounded by the side wall 42 and the bottom wall 44. The side wall 42 includes a first side wall portion 42A and a second side wall portion 42B that face each other in the longitudinal direction of the groove body 40 via the oil chamber 40A. The bottom wall 44 is provided with at least one communication hole 44A that communicates the oil chamber 40A with the space 12D of the accommodating portion 12A. In one example, two communication holes 44A are provided in the bottom wall 44.

The bolt 34 has a threaded portion 34A and a head portion 34B. The threaded portion 34A is screwed into the screw hole 46A of the support projection 46 (refer to Fig. 3). The head portion 34B is disposed on the support portion 32D of the top plate 32 (refer to FIG. 3). The top plate 32 is fixed to the groove main body 40 by screwing the bolt 34 into the screw hole 46A of the support projection 46.

The support protrusion 46 has a cylindrical shape that can be inserted into the top plate hole 32A provided in the top plate 32. In one example, the trough body 40 has three support projections 46. Two of them are shown in Figure 2. The support protrusion 46 (not shown) has the same or similar structure as the support protrusion 46 shown.

The diaphragm 36 is disposed in the oil chamber 40A for closing the opening of the tank body 40. The operating oil is stored in a portion surrounded by the diaphragm 36, the side wall 42, and the bottom wall 44 in the oil chamber 40A. The diaphragm 36 is deformed in response to the difference between the pressure of the operating oil stored in the oil chamber 40A and the atmospheric pressure. The volume change of the operating oil of the oil chamber 40A is eliminated by the deformation of the diaphragm 36.

Bicycle hydraulic operating device 10, except device body 12, etc. In addition to the spring 20, the piston 22, the adapter 24, the connecting rod 26, and at least one piston ring 28. The apparatus main body 12 has a housing portion (cylinder bore) 12A, a connecting portion 12B, and a partitioning portion 12C. In the accommodating portion 12A, a space 12D in which the spring 20 or the like can be disposed is formed between the connecting portion 12B and the piston 22. The connecting portion 12B includes a space 12E into which a hose can be inserted. The division portion 12C is provided between the housing portion 12A and the connection portion 12B. The communication portion 12C is formed with a communication hole 12F that communicates the space 12D of the housing portion 12A with the space 12E of the connection portion 12B. The spring 20, the piston 22, the adapter 24, and the connecting rod 26 are disposed in the housing portion 12A.

The piston 22 is movable relative to the apparatus main body 12 along the central axis of the housing portion 12A that forms the cylindrical space. The adapter 24 is fixed to the piston 22 and moves integrally with the piston 22. The spring 20 is disposed between the partition portion 12C and the piston 22, and applies a force to the piston 22 to move the piston 22 away from the partition portion 12C. The connecting rod 26 is coupled to the lever 18. The spherical head portion 26A provided on the connecting rod 26 is fitted into the spherical recess portion 24A provided in the adapter seat 24.

In one example, the bicycle hydraulic operating device 10 has a first piston ring 28A and a second piston ring 28B. The first piston ring 28A and the second piston ring 28B are attached to the outer circumference of the piston 22, respectively, and are in contact with the wall surface of the accommodating portion 12A. In the oil chamber 40A and the apparatus main body 12, the working oil is stored in the portion from the second piston ring 28B to the space 12E side and in the hose. The second piston ring 28B has a sealing function for preventing the operating oil of the accommodating portion 12A from leaking to the side of the connecting rod 26.

When the lever 18 is in the standby position, by the spring 20 The force causes the piston 22 and the adapter 24 to reach the position furthest from the connecting portion 12B. When the operation lever 18 makes the operation amount of the lever 18 large, the connecting rod 26 moves in the direction approaching the connecting portion 12B with respect to the apparatus main body 12. The piston 22 and the adapter 24 are pressed by the connecting rod 26 to move toward the connecting portion 12B. Therefore, the operating oil of the accommodating portion 12A is caused to flow to the hose.

As shown in FIG. 3, the groove main body 40 has a seal reinforcing structure 48 provided around the support protrusion 46 at the end surface 42C. The end surface 42C is a surface that is disposed on the side surface of the side wall 42 and faces the top plate 32. The support projection 46 extends from the end surface 42C toward the top plate 32 side, and has a screw hole 46A into which the bolt 34 is screwed. One of the support projections 46 shown in Fig. 2 is provided on the end surface 42C of the first side wall portion 42A. The other support projection 46 shown in Fig. 2 is provided on the end surface 42C of the second side wall portion 42B. The threaded hole 46A is formed in the support protrusion 46 and the side wall 42 (refer to FIG. 3).

The seal reinforcing structure 48 includes a concave portion 48A that is provided at least partially (intermittently) around the support projection 46 on the end surface 42C. In one example, the concave portion 48A is formed in a ring shape so as to surround the support projection 46. That is, the recess 48A is provided as an annular groove. A seal reinforcing structure 48 is provided for each of the two support protrusions 46 shown in Fig. 2, respectively. The screw hole 46A of the support projection 46 not shown in Fig. 2 communicates with a discharge hole (not shown) provided in the groove main body 40. In one example, a seal reinforcement structure 48 is not formed around the support protrusion 46.

The top plate 32 has: at least one top plate hole 32A and at least one Support portions 32D. In one example, the top plate 32 has a plurality of top plate holes 32A and a plurality of support portions 32D. The number of the top plate holes 32A and the support portion 32D is three. The top plate hole 32A is provided to be inserted into the support protrusion 46. The support portion 32D is provided with a head portion 34B for supporting the bolts 34.

The top plate hole 32A has a first opening 32B and a second opening 32C. The first opening 32B is opened to the outer surface portion (hereinafter referred to as "outer portion 32E") provided in the face portion of the top plate 32, and is formed to have a certain first portion from the outer surface portion 32E to the middle portion of the top plate hole 32A. diameter. The first diameter has a size at which the support protrusion 46 can be inserted at least. The second opening 32C is opened in a surface portion (hereinafter referred to as "inner surface 32F") on the end surface 42C side of the groove main body 40 provided in the surface portion of the top plate 32, and is formed from the inner surface 32F to the end of the first opening 32B. The portion has a second diameter larger than the first diameter. The shape of the second opening 32C is a tapered shape that decreases in diameter from the inner surface 32F toward the first opening 32B. The diameter of the second opening 32C can be inserted into the support protrusion 46 and has a size that allows a part of the deformed sealing member 38 to enter.

In one example, the sump 30 has a plurality of sealing members 38. The number of the sealing members 38 is three. Figure 2 shows two of the three sealing members 38. The illustration of the other sealing member 38 is omitted. The three sealing members 38 are integrally formed with the diaphragm 36 and disposed between the end surface 42C of the groove main body 40 and the inner surface 32F of the top plate 32. The three sealing members 38 have a sealing hole 38A, a first chamfered portion 38B, a second chamfered portion 38C, a third chamfered portion 38D, a fourth chamfered portion 38E, a first annular projection 38F, and a second ring. Shaped protrusion 38G. Sealing hole 38A having a support protrusion 46 The shape of the insert. The inner circumferential surface of the sealing hole 38A is in contact with the support protrusion 46.

The first annular projection 38F is provided on the end surface 42C side of the groove main body 40 around the sealing hole 38A, and protrudes toward the end surface 42C side. The end surface of the first annular projection 38F (the lower end surface in Fig. 3) is in contact with the end surface 42C of the groove main body 40. The second annular projection 38G is provided on the side of the top plate 32 around the sealing hole 38A, and protrudes toward the top plate 32 side. The end surface of the second annular projection 38G (the upper end surface in Fig. 3) is in contact with the inner surface 32F of the top plate 32.

The first chamfered portion 38B is provided on the edge of the end face 42C of the groove main body 40 at the edge of the seal hole 38A. The second chamfered portion 38C is provided on the edge of the inner surface 32F of the top plate 32 at the edge of the sealing hole 38A. In one example, the first chamfered portion 38B and the second chamfered portion 38C cover the entire circumference of the sealing hole 38A. In one example, the third chamfered portion 38D is formed along the outer peripheral edge of the first annular projection 38F, and the fourth chamfered portion 38E is formed along the outer peripheral edge of the second annular projection 38G.

In the third embodiment, the bolt 34 is screwed into the screw hole 46A of the support projection 46 so as to include the tightening torque of the bolt 34 in the first predetermined range (hereinafter referred to as "first seal state"). In one example, the diaphragm 36, the sealing member 38, and the top plate 32 are attached to the tank body 40 by the following sequence.

Initially, the support protrusion 46 is inserted into the sealing hole 38A of the sealing member 38, and the sealing member 38 is placed on the end surface 42C of the groove main body 40. Thereby, the diaphragm 36 is disposed in the oil chamber 40A (refer to FIG. 2). The top plate 32 is then placed on the sealing member 38 to sandwich the sealing member 38 Between the top plate 32 and the end surface 42C of the groove body 40. Next, the screw portion 34A of the bolt 34 is inserted into the screw hole 46A of the support projection 46, and the bolt 34 is screwed into the screw hole 46A.

By applying a force to the sealing member 38 with the fastening of the bolt 34, the sealing member 38 is compression-deformed in the direction along the central axis of the bolt 34. As the degree of compression deformation of the sealing member 38 increases, the surface pressure of the first annular projection 38F and the end surface 42C of the groove main body 40, the surface pressure of the second annular projection 38G and the inner surface 32F of the top plate 32, and the sealing hole The surface pressure of the inner peripheral surface of the 38A and the support protrusion 46 is increased. In order to prevent the operating oil stored in the oil chamber 40A from leaking when the tightening torque of the bolt 34 reaches the first predetermined range, the end surface 42C of the groove main body 40 and the inner surface 32F of the top plate 32 are appropriately appropriately sealed by the sealing member 38. Sealed between. The sealing member 38 is compressed to such an extent that it does not enter the recess 48A and the second opening 32C of the seal reinforcing structure 48.

4 is a view showing a state in which the bolt 34 is screwed into the screw hole 46A of the support protrusion 46 so that the tightening torque of the bolt 34 is included in the second predetermined range larger than the first predetermined range (hereinafter referred to as "Second sealed state"). When the tightening torque of the bolt 34 is further reinforced from the state included in the first predetermined range, the degree of compression deformation of the sealing member 38 is further increased, and a part of the sealing member 38 is introduced into the recess 48A of the seal reinforcing structure 48. And the second opening 32C. The volume of the sealing member 38 that has entered the recessed portion 48A and the second opening 32C increases mainly depending on the tightening torque of the bolt 34 as the tightening torque of the bolt 34 increases.

A part of the sealing member 38 that has entered the concave portion 48A (hereinafter referred to as "the first inlet portion 38H") strongly presses the wall surface of the side wall 42 constituting the concave portion 48A and the wall surface of the support projection 46. A part of the sealing member 38 (hereinafter referred to as "second entering portion 38I") that has entered the second opening 32C strongly presses the wall surface of the top plate 32 constituting the top plate hole 32A and the wall surface of the support projection 46. Therefore, the sealing property between the end surface 42C of the groove main body 40 and the inner surface 32F of the top plate 32 is further improved.

When a force acting to move the sealing member 38 away from the support protrusion 46 in the radial direction of the bolt 34 is applied to the sealing member 38, the movement of the sealing member 38 by the force is caused by the first entrance portion 38H and the portion constituting the recess 48A. The contact of the wall surface of the side wall 42 and the contact of the second entrance portion 38I with the wall surface of the top plate 32 constituting the top plate hole 32A are restricted. Therefore, the position of the sealing member 38 is stabilized.

Whether the tightening torque of the bolt 34 is to be included in the first predetermined range or the second predetermined range is selected by the operator in accordance with the use environment of the bicycle or the like. In the first sealed state and the second sealed state, the operating oil stored in the oil chamber 40A (refer to FIG. 2) is not leaked, and the end surface 42C of the groove main body 40 and the inner surface 32F of the top plate 32 are sufficiently provided. seal. For example, when using a bicycle in an environment where a stronger seal is required, it is recommended to select the second seal state.

(Modification)

The description of the above embodiment is an oil storage tank for a bicycle hydraulic operating device of the present invention and a bicycle hydraulic operation including the oil storage tank. The example of the type taken of the device is not intended to limit its form. The present invention can take, for example, a modification of the above-described embodiment and a combination of at least two modifications that are not contradictory.

The configuration of the top plate hole 32A can be arbitrarily changed. In one example, the top plate hole 32A has a first opening that opens in the outer surface portion 32E of the top plate 32 and a second opening that opens in the inner surface 32F of the top plate 32, and has a larger diameter from the first opening to the second opening. Conical shape.

The structure of the support protrusion 46 of the groove main body 40 can be arbitrarily changed. In one example, the trough body 40 has one, two, or more than any number of support protrusions 46.

The structure of the recess 48A of the seal reinforcing structure 48 can be arbitrarily changed. In the first example, the seal reinforcing structure 48 further includes at least one groove portion formed concentrically with the groove portion on the outer peripheral side of the groove portion of the recess portion 48A. In the second example, the seal reinforcing structure 48 may include at least one groove portion different from the groove portion in addition to the groove portion of the concave portion 48A. An example of the shape of the groove portion is an arc shape. In the third example, the seal reinforcing structure 48 may include at least one groove instead of or in addition to the groove of the recess 48A. In one example, the groove has a hemispherical bottom surface. The grooves can also be arranged intermittently.

The structure of the seal reinforcing structure 48 may further include any structure of at least one of the concave portion 48A and the convex portion. The configuration of the convex portion is exemplified as follows. In the first example, the seal reinforcing structure 48 includes an annular convex portion formed around the support protrusion 46. In the second example, the seal reinforcing structure 48 is further included in the periphery of the convex portion of the first example. At least one convex portion on the concentric circle. In the third example, the seal reinforcing structure 48 may include at least one convex portion different from the convex portion in addition to the convex portion of the first example or the second example. In one example, the protrusion has a circular arc shape. In the fourth example, in place of or in addition to the convex portions of the first to third examples, at least one protrusion may be included. In one example, the protrusion has a hemispherical front end. The protrusions can also be arranged intermittently. In the case where the seal reinforcing structure 48 includes the convex portion, the effect of improving the sealing property between the end surface 42C of the groove main body 40 and the inner surface 32F of the top plate 32 and the effect of stabilizing the position of the sealing member 38 can be obtained.

The support protrusion 46 to which the seal reinforcing structure 48 is provided can be arbitrarily changed. In the first example, the seal reinforcing structure 48 is provided only on one of the two support projections 46 shown in Fig. 2 among the three support projections 46. In the second example, the seal reinforcing structure 48 is provided on all of the periphery of the three support projections 46. In the third example, a seal reinforcing structure 48 is provided around one of the two support projections 46 shown in Fig. 2 and the support projections 46 not shown in Fig. 2 . In the fourth example, the seal reinforcing structure 48 is provided only around the support protrusion 46 not shown in Fig. 2 .

The portion where the seal reinforcing structure 48 of the end surface 42C is formed can be arbitrarily changed. In one example, the seal reinforcing structure 48 is provided at a portion of the end surface 42C that is closer to the edge of the end surface 42C than the portion facing the sealing member 38. This example can also be used in the case where the seal reinforcing structure 48 includes a concave portion or a convex portion.

The sealing member 38 can be modified to have an end face of the groove body 40 Any configuration that seals between 42C and the inner face 32F of the top plate 32. In one example, at least one of the plurality of sealing members 38 is additionally formed with the diaphragm 36.

The object to which the seal reinforcing structure 48 can be applied is not limited to the oil sump of the bicycle hydraulic device having the disc. For other bicycle hydraulic devices having an oil reservoir, a seal strengthening structure may be provided in the oil reservoir according to the configuration of the embodiment.

10‧‧‧Bicycle hydraulic operating device

12‧‧‧Device body

12A‧‧‧Receiving Department

12B‧‧‧Connecting Department

12C‧‧‧Districts Department

12D‧‧‧ Space

12E‧‧‧ Space

12F‧‧‧Connected holes

18‧‧‧Leverage

20‧‧‧ Spring

22‧‧‧Piston

24‧‧‧Adapter

24A‧‧‧ recess

26‧‧‧Links

26A‧‧‧ head

28‧‧‧Piston ring

28A‧‧‧1st piston ring

28B‧‧‧2nd piston ring

30‧‧‧ oil storage tank

32‧‧‧ top board

32A‧‧‧Top hole

34‧‧‧Bolts

34A‧‧ Thread Department

34B‧‧‧ head

36‧‧‧Separator

38‧‧‧ Sealing members

40‧‧‧ slot body

40A‧‧‧ oil room

42‧‧‧ side wall

42A‧‧‧1st side wall

42B‧‧‧2nd side wall

42C‧‧‧ end face

44‧‧‧ bottom wall

44A‧‧‧Connected holes

46‧‧‧Support protrusion

Claims (10)

An oil storage tank for a bicycle hydraulic operating device includes: a groove main body, a top plate, and a sealing member; the groove main body includes: an end surface, a support protrusion extending from the end surface, and a seal provided on the end surface of the support protrusion a reinforcing structure; the top plate having a top plate hole for inserting the support protrusion; the sealing member having a sealing hole for inserting the support protrusion, and disposed between the end surface of the groove main body and the top plate. The oil storage tank for a bicycle hydraulic operating device according to the first aspect of the invention, wherein the seal reinforcing structure includes a concave portion at least partially provided around the support projection. The oil storage tank for a bicycle hydraulic operating device according to the second aspect of the invention, wherein the recessed portion is formed in a ring shape so as to surround the support protrusion. The oil storage tank for a bicycle hydraulic operating device according to the first aspect of the invention, wherein the top plate hole has a first opening having a first diameter and an end surface side closer to the groove main body than the first opening a second opening having a second diameter larger than the first diameter. An oil storage tank for a bicycle hydraulic operating device, comprising: a tank body, a top plate, and a sealing member; the groove body having: an end surface and a supporting protrusion extending from the end surface; the top plate having a top plate for inserting the supporting protrusion hole; The sealing member has a sealing hole for inserting the support protrusion, and is disposed between the end surface of the groove main body and the top plate; the top plate hole has a first opening having a first diameter, and is provided in the first The opening 1 is closer to the end surface side of the groove main body, and has a second opening having a second diameter larger than the first diameter. The oil storage tank for a bicycle hydraulic operating device according to any one of claims 1 to 5, wherein the sealing member is integrated with a diaphragm disposed in the groove main body. The oil storage tank for a bicycle hydraulic operating device according to any one of claims 1 to 5, wherein the sealing member further includes: a first one disposed on the end surface side of the groove main body around the sealing hole At least one of the annular projection and the second annular projection provided on the top plate side around the sealing hole. The oil sump for a bicycle hydraulic operating device according to the seventh aspect of the invention, wherein the sealing member further includes: a first chamfered portion provided at an edge of the sealing hole at a portion of the groove body at the end surface side And a portion of the top plate side is provided on at least one of the second chamfered portions of the edge of the sealing hole. The sump for a bicycle hydraulic operating device according to any one of claims 1 to 5, wherein the support projection has a threaded hole, the top plate has a support portion, and further includes a bolt having a screw-in a threaded portion of the threaded hole of the support protrusion and a head portion of the support portion disposed on the top plate. A bicycle hydraulic operating device comprising the oil storage tank for a bicycle hydraulic operating device according to any one of claims 1 to 5.