TWI796209B - Hydraulic brake device - Google Patents

Abstract

A hydraulic brake device is configured to be mounted on an opening end of a handlebar located at an axis of the handlebar. The hydraulic brake device includes a main body and a lever. The main body includes a hydraulic tank, a mount structure, and a piston. The hydraulic tank is connected to the mount structure, and the mount structure is configured to be mounted on the opening end of the handlebar. The hydraulic tank has a hydraulic chamber, and a long axis of the hydraulic chamber is defined on a reference plane. The piston is movably located in the hydraulic chamber and movable along the long axis of the hydraulic chamber. The lever includes a first part and a second part. One end of the first part is pivotally disposed on the hydraulic tank and connected to the piston, and another end of the first part is connected to the second part. The pivot axis of the first part is perpendicular to the reference plane, and the second part of the lever and the mount structure are located at the same side of the reference plane.

Description

hydraulic brake

The invention relates to a braking device, in particular to a hydraulic braking device.

Generally speaking, the handlebar of a road bicycle is usually a flat handle portion and its opposite ends are respectively connected to two bend handle portions, and the left and right brake handles of the bicycle are respectively configured on the two bend handle portions.

In order to solve the inconvenient operation of the brake handle on the handlebar when the rider is holding the riding position of the flat handlebar with both hands, some bicycle manufacturers will install two additional brake handlebars on the flat handlebar of the rider. , for the rider in the riding position holding the flat handlebars to operate. Of course, there will be four brake handles arranged on the driver's handle and a plurality of oil pipes connected to these brake handles, which greatly affects the aesthetics of the bicycle. Therefore, bicycle manufacturers are currently working on solving such problems.

The present invention is to provide a hydraulic brake device, which can be operated by a rider in different riding positions.

An embodiment of the present invention discloses a hydraulic brake device for attaching to an open end on an axis of a handlebar. The hydraulic brake device includes a body and a brake lever. The body includes a hydraulic cylinder, an attachment structure and a piston. The hydraulic cylinder is connected to the attachment structure, and the attachment structure is used to be attached to the open end on the axis of the handlebar. The hydraulic cylinder has a hydraulic chamber, the long axis of the hydraulic chamber is defined as being on a reference plane, and the piston is movably located in the hydraulic chamber and can move along the long axis of the hydraulic chamber. The brake lever includes a first operating part and a second operating part. One end of the first operating part is pivoted to the hydraulic cylinder and connected to the piston. The other end of the first operating part is connected to the second operating part. The first operating part The pivot axis is perpendicular to the reference plane. The second operating portion of the brake lever and the attachment structure are located on the same side of the reference plane.

Another embodiment of the present invention discloses a hydraulic brake device for attaching to an open end on the axis of a handlebar of a bicycle. The hydraulic brake device includes a body and a brake lever. The body includes a hydraulic cylinder, an attachment structure and a piston. The hydraulic cylinder is connected to the attachment structure, and the attachment structure is used to be attached to the open end on the axis of the handlebar. The hydraulic cylinder has a hydraulic chamber, and the piston is movably located in the hydraulic chamber. The brake rod is pivotally arranged on the hydraulic cylinder and connected to the piston. The brake rod can pivot relative to the hydraulic cylinder to drive the piston to move in the hydraulic chamber. Viewing the bicycle from a direction perpendicular to a plane on which the bicycle lies, the pivot axis of the brake lever forms an acute angle with the axis of the handlebar.

Yet another embodiment of the present invention discloses a hydraulic brake device for attaching to an open end on an axis of a handlebar of a bicycle. The hydraulic brake device includes a body and a brake lever. The body includes a hydraulic cylinder, an attachment structure and a piston. The hydraulic cylinder is connected to the attachment structure, and the attachment structure is used to be attached to the open end on the axis of the handlebar. The hydraulic cylinder has a hydraulic chamber, and the piston is movably located in the hydraulic chamber. The brake rod is pivotally arranged on the hydraulic cylinder and connected to the piston. The brake rod can pivot relative to the hydraulic cylinder to drive the piston to move in the hydraulic chamber. Viewing the bicycle from a direction perpendicular to a plane on which the bicycle lies, the pivot axis of the brake lever is parallel to the axis of the handlebar.

Yet another embodiment of the present invention discloses a hydraulic brake device for attaching to an open end on an axis of a handlebar. The hydraulic brake device includes a body and a brake lever. The body includes a hydraulic cylinder, an attachment structure and a piston. The hydraulic cylinder is connected to the attachment structure, and the attachment structure has an abutment surface for abutting against the open end on the axis of the handlebar. The hydraulic cylinder has a hydraulic chamber, the long axis of the hydraulic chamber is defined as being on a reference plane, and the piston is movably located in the hydraulic chamber and can move along the long axis of the hydraulic chamber. The brake pull rod is pivotally arranged on the hydraulic cylinder and connected to the piston, and the pivot axis of the brake pull rod is perpendicular to the reference plane. Wherein, the abutment surface of the attachment structure does not intersect the reference surface.

According to the hydraulic brake device disclosed in the above embodiments, one end of the first operating part of the brake lever is pivotally arranged on the hydraulic cylinder and connected to the piston, and the other end of the first operating part is connected to the second operating part. The pivot axis of the part is perpendicular to the datum plane where the long axis of the hydraulic chamber is located, and the setting of the second operating part of the brake lever and the attachment structure on the same side of the datum plane allows the user to hold the hydraulic cylinder The first operating part that can operate the brake lever for braking in the riding posture state, and the second operating part that allows the user to operate the brake lever for braking in the riding posture state holding the handlebar. That is to say, the hydraulic brake device can be operated by the rider in different riding postures, so there is no need to add other brake devices and pipelines connected thereto on the handlebar, and the appearance of the bicycle can be maintained.

The above description of the content of the present invention and the following description of the implementation are used to demonstrate and explain the principle of the present invention, and provide further explanation of the patent application scope of the present invention.

Please refer to Figures 1 and 2. FIG. 1 is a schematic perspective view of a hydraulic brake device and a handlebar according to a first embodiment of the present invention. FIG. 2 is an exploded schematic diagram of FIG. 1 .

In this embodiment, the hydraulic brake device 1 is used to attach an open end 3 on an axis A (shown in FIG. 3 ) of a handlebar 2 of a bicycle. In order to highlight the connection relationship between the hydraulic brake device 1 and the handlebar 2 , FIGS. 1 and 2 and subsequent figures only show the hydraulic brake device 1 and part of the handlebar 2 , and omit other parts of the bicycle.

The hydraulic brake device 1 includes a body 10 and a brake rod 20 . The body 10 includes a hydraulic cylinder 11 , an attachment structure 12 and a piston 13 .

The hydraulic cylinder 11 includes a cylinder body 111 , a cover body 112 and a plurality of screws 113 . The cylinder body 111 has an oil storage tank 1111 , a hydraulic chamber 1112 and a communication hole 1113 , and the oil storage tank 1111 communicates with the hydraulic chamber 1112 through the communication hole 1113 . In this embodiment, the hydraulic chamber 1112 of the hydraulic cylinder 11 is, for example, an elongated chamber. The cover body 112 is fixed to the cylinder body 111 through screws 113 and covers the oil storage tank 1111 .

The attachment structure 12 is connected to the cylinder body 111 and generally presents an L-shaped shape together with the hydraulic cylinder 11 , and the attachment structure 12 has a cylindrical shape. In detail, the attachment structure 12 includes an abutting portion 121 and an insertion portion 122 . The abutting portion 121 is connected to the cylinder body 111 , and the abutting portion 121 has an abutting surface 1211 facing away from the cylinder body 111 , and the insertion portion 122 protrudes from the abutting surface 1211 of the abutting portion 121 .

Next, please refer to FIG. 2 and FIG. 3 together. FIG. 3 is a schematic cross-sectional view along the section line 3-3 in FIG. 1 .

In this embodiment, the attachment structure 12 is used to be inserted into the open end 3 of the handlebar 2 . Specifically, the handlebar 2 has an inner space 4 , an inner wall 5 forming the inner space 4 and an opening 6 communicating with the inner space 4 , wherein the opening 6 is located at the open end 3 of the handlebar 2 . The insertion part 122 of the attachment structure 12 is inserted into the inner space 4 of the handlebar 2 from the opening 6 of the open end 3 of the handlebar 2 , and the abutting surface 1211 of the abutting part 121 abuts against the open end 3 of the handlebar 2 . In this embodiment, the handlebar 2 is covered with a grip 8 of a material different from it, and the grip 8 also leans against the abutting surface 1211 of the abutting portion 121 , for example. For example, the handle bar 2 is made of metal, and the grip 8 is made of rubber. The grip 8 can increase the friction force when the rider holds the handlebar 2. However, the grip cover 8 is an optional material, which can be omitted or replaced by wrapping cloth.

The piston 13 is movably located in the hydraulic chamber 1112 and can move along the long axis L of the hydraulic chamber 1112 .

In this embodiment, the body 10 may further include an oil outlet passage 14, and different parts of the oil outlet passage 14 are respectively located in the cylinder body 111 of the hydraulic cylinder 11 and the attachment structure 12, and the oil outlet passage 14 communicates with the hydraulic chamber 1112. The oil outlet channel 14 communicates with a brake caliper (not shown) through the oil pipe 7 in the inner space 4 of the handlebar 2 , for example.

In this embodiment, the body 10 may further include an elastic member 15 located in the hydraulic chamber 1112 . The elastic member 15 is used for applying force to the piston 13 to move away from the oil outlet passage 14 .

The brake lever 20 includes a first operating portion 21 and a second operating portion 22 . In addition, the hydraulic braking device 1 further includes a pivot 70 and a connecting rod 30 . One end of the first operating part 21 is pivoted to the cylinder body 111 of the hydraulic cylinder 11 through the pivot 70, and the other end of the first operating part 21 is connected to the second operating part 22, wherein the first operating part 21 and the second operating part 22 extend along two different directions respectively. In detail, the first operation part 21 and the second operation part 22 respectively extend along two directions approximately perpendicular to each other. The connecting rod 30 passes through the cylinder body 111 of the hydraulic cylinder 11 , and opposite ends of the connecting rod 30 are respectively connected to the first operating portion 21 of the brake rod 20 and the piston 13 in the hydraulic chamber 1112 .

In this embodiment, the major axis L of the hydraulic chamber 1112 is defined as being located on a reference plane R, where the major axis L of the hydraulic chamber 1112 is located on the reference plane R means that the major axis L of the hydraulic chamber 1112 completely overlaps on the reference plane R. Further, as shown in FIG. 3 , the long axis L of the hydraulic chamber 1112 is defined as being parallel to the X axis in the three-axis coordinate system, and the long axis L of the hydraulic chamber 1112 completely overlaps with the X axis in the parallel three-axis coordinate system. On the datum plane R of the plane formed by the X and Z axes. The pivot axis P of the first operating portion 21 of the brake lever 20 is perpendicular to the reference plane R where the major axis L of the hydraulic chamber 1112 is located. That is to say, the pivot axis P of the first operating portion 21 of the brake lever 20 is perpendicular to the plane formed by the X, Z axes, and parallel to the Y axis perpendicular to the plane formed by the X, Z axes. Looking at the bicycle from a direction perpendicular to a plane S on which the bicycle is located, the pivot axis P of the brake lever 20 forms an acute angle θ with the axis A of the handlebar 2, wherein, the bicycle is located on the plane S means that the bicycle is in a normal riding state , that is, the state where the front and rear wheels of the bicycle are in contact with the plane S and the body of the bicycle is standing straight on the plane S. The plane S is, for example, a plane formed by a horizontal plane parallel to the X and Y axes, and the direction perpendicular to the horizontal plane is the direction of gravity And parallel to the Z axis. That is to say, looking at the plane S from directly above the plane S in FIG. 3 (viewing along the direction parallel to the Z axis), the pivot axis P of the brake lever 20 and the axis A of the handlebar 2 form an acute angle θ, wherein the acute angle The angle θ is not greater than 50 degrees, preferably the acute angle θ is not greater than 45 degrees. In addition, the second operating portion 22 of the brake lever 20 and the attachment structure 12 are located on the same side of the reference plane R. As shown in FIG. Furthermore, the abutting surface 1211 of the abutting portion 121 of the attachment structure 12 does not intersect the reference plane R. As shown in FIG. That is to say, the abutting surface 1211 of the abutting portion 121 of the attachment structure 12 maintains a distance from the reference plane R. As shown in FIG.

In this embodiment, one end of the first operating portion 21 of the brake lever 20 is pivotally mounted on the cylinder body 111 of the hydraulic cylinder 11 and connected to the piston 13, and the other end of the first operating portion 21 is connected to the second operating portion. 22. The pivot axis P of the first operating part 21 is perpendicular to the reference plane R where the major axis L of the hydraulic chamber 1112 is located, and the second operating part 22 of the brake lever 20 and the attachment structure 12 are located on the same side of the reference plane R The setting allows the user to operate the first operating part 21 of the brake lever 20 for braking in the riding posture state holding the hydraulic cylinder 11 of the hydraulic brake device 1, and allows the user to brake while holding the handlebar. In the riding posture state of 2, the second operating part 22 of the brake lever 20 can be operated for braking.

In detail, the rider of the bicycle can operate the first operating portion 21 of the brake lever 20 in the riding posture holding the hydraulic cylinder 11 , and drive the piston 13 in the hydraulic chamber 1112 through the connecting rod 30 . move to generate oil pressure, which is transmitted to the brake calipers through the oil outlet passage 14 and the oil pipe 7, and actuates the brake calipers for braking.

On the other hand, the rider of the bicycle can operate the second operating part 22 of the brake lever 20 in the riding posture of holding the handlebar 2, and the piston 13 is driven through the first operating part 21 and the connecting rod 30 in the riding position. The hydraulic chamber 1112 moves to generate oil pressure, and the oil pressure is transmitted to the brake caliper through the oil outlet passage 14 and the oil pipe 7 to actuate the brake caliper for braking.

It can be seen that the hydraulic brake device 1 can be operated by the rider in different riding positions, so there is no need to add other brake devices and pipelines connected to the handlebar, and the appearance of the bicycle can be maintained.

Next, please refer to Figures 2, 4 and 5. FIG. 4 is a schematic cross-sectional view along the section line 4 - 4 in FIG. 3 . FIG. 5 is a schematic cross-sectional view along the section line 5-5 in FIG. 4 .

In this embodiment, the hydraulic brake device 1 may further include two pressing members 40 and a pushing member 50 . In addition, the insertion portion 122 of the attachment structure 12 may have an oil pipe assembly column 1221 and a groove 1222 . The oil pipe assembly column 1221 is used for assembling the oil pipe 7 , and the groove 1222 is located beside the oil pipe assembly column 1221 .

The two resisting parts 40 are made of rubber, for example, and have an arc shape. The two resisting members 40 are movably disposed in the groove 1222 of the insertion portion 122 of the attachment structure 12 , and the two resisting members 40 are arranged asymmetrically with respect to the axis A1 of the attachment structure 12 . The two resisting parts 40 can move along the radial direction of the attachment structure 12 (directions D1 and D2 shown in FIG. 4 ).

In this embodiment, the hydraulic brake device 1 may further include a buckle 80, the buckle 80 is sleeved in the oil pipe assembly column 1221 and the groove of the two resisting parts 40, and restricts the two resisting parts 40 in the attachment structure 12 in the axial direction (reverse direction D3 as shown in FIG. 4 ), and provide two resisting parts 40 that can move in the radial direction of the attachment structure 12 (directions D1, D2 as shown in FIG. 4 ). surplus.

A part of the pushing piece 50 is located between the two pressing pieces 40 , and another part of the pushing piece 50 abuts against one side of each pressing piece 40 along the axial direction of the attachment structure 12 . In detail, each of the two resisting pieces 40 has a guide slope 41, and the pushing piece 50 also has two guiding slopes 51, and the two guiding slopes 51 of the pushing piece 50 abut against the guide slopes 41 of the two pressing pieces 40 respectively. . The pushing member 50 can move along the axial direction of the attachment structure 12 (direction D3 as shown in FIG. The pressing member 40 presses against the inner wall 5 of the handlebar 2 .

In detail, the pushing member 50 also has an assembly hole 52 and an internal thread structure 53 located in the assembly hole 52 , and the hydraulic brake device 1 further includes a driving member 60 . The driving member 60 is, for example, a screw, which has an external thread structure 61 . The driving member 60 passes through the attachment structure 12 , and the external thread structure 61 of the driving member 60 is screwed into the internal thread structure 53 in the assembly hole 52 of the pushing member 50 . The driving member 60 can rotate relative to the pushing member 50, and drives the pushing member 50 to move along the axial direction of the attachment structure 12 (direction D3 as shown in FIG. 4 ) through the external thread structure 61 and the internal thread structure 53, so that the pushing The two guide slopes 51 of the member 50 respectively press against the guide slopes 41 of the two resisting members 40 , and drive the two resisting members 40 to press against the inner wall surface 5 of the handlebar 2 along the directions D1 and D2 . Thereby, the hydraulic brake device 1 can be fixed to the open end 3 of the handlebar 2 through the attachment structure 12 of the main body 10 , the two pressing pieces 40 , the pushing piece 50 and the driving piece 60 .

It should be noted that the number of the guide slopes 51 of the pushing member 50 is not limited to two. In other embodiments, the pushing member may have only one guiding inclined surface, and the guiding inclined surface can press against the guiding inclined surfaces of the two resisting members at the same time. In addition, the number of the pressing pieces 40 is not limited to two. In other embodiments, the hydraulic braking device may only include one pressing member. Furthermore, the hydraulic brake device 1 is not limited to being fixed to the open end 3 of the handlebar 2 through the aforementioned elements. In other embodiments, the hydraulic brake device may not have a pushing member, a pressing member, and a driving member, and the hydraulic brake device may only be fixed on the handlebar by tightly pressing the inner wall surface of the handlebar through the insertion part of the attachment structure. open end.

Next, please refer to FIG. 6 and FIG. 7 . FIG. 6 is a perspective view of a hydraulic brake device and a handlebar according to a second embodiment of the present invention. FIG. 7 is an exploded schematic diagram of FIG. 6 .

The hydraulic brake device 1a of this embodiment is also used to attach the open end 3 of the handlebar 2 of a bicycle. The handlebar 2 is covered with a grip 8 and has an oil pipe 7 inside. The hydraulic brake device 1a also includes a body 10a, a brake lever 20a and a connecting rod 30a, wherein the body 10a also includes a hydraulic cylinder 11a, an attachment structure 12a and a piston 13a, and the brake lever 20a also includes a first operating portion 21a and a second Operation section 22a. The structure of these aforementioned components and the connection relationship between them in this embodiment are similar to the structure of the corresponding components and the connection relationship between them in the hydraulic brake device 1 described above with reference to FIGS. 1 to 5 . The difference between the device 1a and the hydraulic brake device 1 described above with reference to FIGS. The structure of the open end 3 of 2 will be described, and the same parts between the two can be referred to the explanations described in FIGS. 1 to 5 and will not be repeated.

Next, please refer to FIG. 7 and FIG. 8 . FIG. 8 is a schematic cross-sectional view along the section line 8-8 in FIG. 6 .

In this embodiment, the attachment structure 12 a of the main body 10 a of the hydraulic brake device 1 a is used to be sleeved on the open end 3 of the handlebar 2 . In detail, the hydraulic braking device 1a further includes a locking accessory 80a. The attachment structure 12a has a slot 121a, an annular inner wall surface 122a, a notch 123a, two assembly structures 124a and an abutting surface 125a. The annular inner wall 122a forms a slot 121a, the notch 123a is located on the annular inner wall 122a, the two assembly structures 124a are respectively located on opposite sides of the notch 123a, and the abutting surface 125a is located in the slot 121a and faces the opening of the slot 121a. The attachment structure 12a is used to sleeve the open end 3 of the handlebar 2, so that the open end 3 of the handlebar 2 is located in the slot 121a of the attachment structure 12a and abuts against the abutting surface 125a. The locking part 80a passes through one of the assembly structures 124a and the notch 123a and is locked to the other assembly structure 124a, so that the ring-shaped inner wall surface 122a tightens the open end 3 of the handlebar 2 . In this way, the hydraulic brake device 1 a is fixed on the open end 3 of the handlebar 2 .

Next, please refer to FIG. 9 and FIG. 10 . FIG. 9 is an exploded view of a hydraulic brake device and a handlebar according to a third embodiment of the present invention. Fig. 10 is a schematic cross-sectional view of the hydraulic brake device and the handlebar of Fig. 9 .

The hydraulic brake device 1b of this embodiment is also used to attach the open end 3 of the handlebar 2 of a bicycle. The handlebar 2 is covered with a grip 8 and has an oil pipe 7 inside. The hydraulic brake device 1b also includes a main body 10b, a brake rod 20b, a connecting rod 30b, a pressing member 40b, a pushing member 50b, a driving member 60b, a pivot 70b and a buckle 80b, wherein the main body 10b also includes a hydraulic cylinder 11b, an attached The connection structure 12b and the piston 13b, and the brake lever 20b also includes a first operating portion 21b and a second operating portion 22b. The structure of these aforementioned components and the connection relationship between them in this embodiment are similar to the structure and connection relationship between the corresponding components of the hydraulic brake device 1 described above with reference to FIGS. 1 to 5 . The difference between the hydraulic brake device 1b of this embodiment and the hydraulic brake device 1 described above with reference to FIGS. The parts that are the same between the two can refer to the descriptions of FIGS. 1 to 5 and will not be repeated here.

In this embodiment, viewing the bicycle from a direction perpendicular to the plane S where the bicycle is located, the pivot axis P of the brake lever 20b is parallel to the axis A of the handlebar 2, wherein, the bicycle is located on the plane S means that the bicycle is in normal riding Ride state, that is, the state in which the front and rear wheels of the bicycle are in contact with the plane S and the body of the bicycle stands upright on the plane S. The plane S is, for example, a horizontal plane and a plane formed parallel to the X and Y axes, and the direction perpendicular to the horizontal plane is Gravity direction and parallel to the Z axis. That is to say, when viewed from directly above the plane S toward the plane S in FIG. 10 (viewed along a direction parallel to the Z axis), the pivot axis P of the brake lever 20b is parallel to the axis A of the handlebar 2 .

According to the hydraulic brake device disclosed in the above embodiment, one end of the first operating part of the brake lever is pivotally arranged on the hydraulic cylinder and connected to the piston, and the other end of the first operating part is connected to the second operating part. The pivot axis of an operating part is perpendicular to the reference plane where the long axis of the hydraulic chamber is located, and the setting of the second operating part and the attachment structure of the brake lever on the same side of the reference plane allows the user to hold the oil The first operating part of the brake lever can be operated for braking in the riding posture state of the cylinder, and the second operating part for the user to operate the brake lever for braking in the riding posture state of holding the handlebar. That is to say, the hydraulic brake device can be operated by the rider in different riding positions without adding other brake devices and pipelines connected to the handlebar, so the appearance of the bicycle can be maintained.

Although the present invention is disclosed above with the aforementioned preferred embodiments, it is not intended to limit the present invention. Any person familiar with the similar art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of patent protection for inventions shall be defined in the scope of patent application attached to this specification.

1,1a,1b: hydraulic brake device 2: Handlebar 3: Open end 4: Internal space 5: Inner wall surface 6: opening 7: Tubing 8: Grip 10, 10a, 10b: Ontology 11,11a,11b: hydraulic cylinder 111: Cylinder body 1111: oil storage tank 1112: hydraulic chamber 1113: Connecting hole 112: cover body 113: screw 12, 12a, 12b: Attachment structure 121: abutment part 1211: abutment surface 122: Insertion Department 1221: Tubing assembly column 1222: Groove 121a: slot 122a: Annular inner wall surface 123a: Gap 124a: Assembly structure 125a: abutment surface 13,13a,13b: Piston 14: Oil outlet channel 15: Elastic parts 20, 20a, 20b: brake lever 21, 21a, 21b: the first operation part 22, 22a, 22b: the second operation part 30, 30a, 30b: connecting rod 40, 40b: pressure piece 41: guide bevel 50,50b: Pushing parts 51: guide bevel 52: Assembly hole 53: Internal thread structure 60,60b: drive parts 61: External thread structure 70,70b: Pivot 80,80b: Buckle 80a: Lock accessories A: axis L: long axis R: reference plane P: pivot axis S: Plane θ: acute angle A1: axis D1, D2, D3: direction

FIG. 1 is a schematic perspective view of a hydraulic brake device and a handlebar according to a first embodiment of the present invention. FIG. 2 is an exploded schematic diagram of FIG. 1 . FIG. 3 is a schematic cross-sectional view along the section line 3-3 in FIG. 1 . FIG. 4 is a schematic cross-sectional view along the section line 4 - 4 in FIG. 3 . FIG. 5 is a schematic cross-sectional view along the section line 5-5 in FIG. 4 . FIG. 6 is a three-dimensional schematic diagram of a hydraulic brake device and a handlebar according to a second embodiment of the present invention. FIG. 7 is an exploded schematic diagram of FIG. 6 . FIG. 8 is a schematic cross-sectional view along the section line 8-8 in FIG. 6 . FIG. 9 is an exploded schematic diagram of a hydraulic brake device and a handlebar according to a third embodiment of the present invention. Fig. 10 is a schematic cross-sectional view of the hydraulic brake device and the handlebar of Fig. 9 .

2: Handlebar

3: Open end

4: Internal space

5: Inner wall surface

6: opening

7: Tubing

8: Grip

11: Hydraulic cylinder

111: Cylinder body

1111: oil storage tank

1112: hydraulic chamber

1113: Connecting hole

112: cover body

113: screw

12: Attachment structure

121: abutment part

1211: abutment surface

122: Insertion Department

1221: Tubing assembly column

1222: Groove

13: Piston

14: Oil outlet channel

15: Elastic parts

20: Brake lever

21: The first operation department

22: The second operation department

30: connecting rod

40: Pressure piece

50: push piece

52: Assembly hole

60: Driver

70: Pivot

80: Buckle

Claims (12)

A hydraulic brake device for attaching to an open end on the axis of a handlebar, the hydraulic brake device comprises: a body including a hydraulic cylinder, an attachment structure and a piston, the hydraulic cylinder is connected to The attachment structure, the attachment structure is used to attach to the open end on the axis of the handlebar, the hydraulic cylinder has a hydraulic chamber, the major axis of the hydraulic chamber is defined to be located on a datum plane , the piston is movably located in the hydraulic chamber and can move along the long axis of the hydraulic chamber; and a brake lever includes a first operating part and a second operating part, one end of the first operating part pivots It is arranged on the hydraulic cylinder and connected to the piston, the other end of the first operating part is connected to the second operating part, and the pivot axis of the first operating part is perpendicular to the reference plane; wherein, the brake lever The second operating portion and the attachment structure are located on the same side of the reference plane. The hydraulic brake device as claimed in claim 1, wherein the attachment structure is used for being sleeved on the open end of the handlebar. The hydraulic brake device as described in claim 2 further comprises a lock accessory, the attachment structure has a slot, an annular inner wall surface, a notch and two assembly structures, the annular inner wall surface forms the slot, the notch is located at On the annular inner wall, the two assembly structures are respectively located on opposite sides of the notch, and the locking part passes through one of the assembly structures and is locked to the other assembly structure, so as to tighten the annular inner wall. This open end of the handlebar. The hydraulic brake device as claimed in claim 1, wherein the attachment structure is used to be inserted into the open end of the handlebar. The hydraulic brake device as described in Claim 4 further comprises at least one pressing member and a pushing member, the attachment structure is a cylinder, the at least one pressing member is movably arranged on the attachment structure, the at least A pressing piece can move along the radial direction of the attachment structure, the pushing piece can move against the at least one pressing piece, the pushing piece can move along the axial direction of the attachment structure, and drive the at least one pressing piece A pressing piece presses against the inner wall of the handlebar. The hydraulic brake device according to claim 5, wherein the at least one pressing piece and the pushing piece each have a guide slope, and the guide slope of the pushing piece is used to press against the at least one pressing piece. The guide inclined surface drives the at least one pressing member to press against the inner wall of the handlebar. The hydraulic brake device as described in claim 5 further includes a driving member, the pushing member has an assembly hole and an internal thread structure, the internal thread structure is located in the assembly hole, the driving member has an external thread structure, The driving part passes through the attachment structure, the external thread structure is screwed into the internal thread structure in the assembly hole, and the driving part can rotate relative to the pushing part, and through the external thread structure and the internal thread The structure drives the pushing member to move along the axial direction of the attachment structure, so as to drive the at least one pressing member to press against the inner wall of the handlebar. The hydraulic brake device according to claim 5, wherein the at least one pressing piece includes two pressing pieces, and the two pressing pieces are arranged asymmetrically with respect to the axis of the attachment structure. A hydraulic brake device for attaching to an open end on the axis of a handlebar of a bicycle, the hydraulic brake device includes: a body, including a hydraulic cylinder, an attachment structure and a piston, the hydraulic brake a cylinder is connected to the attachment structure for attachment to the open end on the axis of the handlebar, the hydraulic cylinder has a hydraulic chamber, the piston is movably located in the hydraulic chamber; and a brake rod pivoted on the hydraulic cylinder and connected to the piston, the brake rod can pivot relative to the hydraulic cylinder to drive the piston to move in the hydraulic chamber; Viewing the bicycle from a plane, the pivot axis of the brake lever forms an acute angle with the axis of the handlebar. The hydraulic brake device as claimed in claim 9, wherein the acute angle is not greater than 50 degrees. A hydraulic brake device for attaching to an open end on the axis of a handlebar of a bicycle, the hydraulic brake device includes: a body, including a hydraulic cylinder, an attachment structure and a piston, the hydraulic brake a cylinder is connected to the attachment structure, the attachment structure is attached to the open end on the axis of the handlebar, the hydraulic cylinder has a hydraulic chamber, the piston is movably located in the hydraulic chamber; and a The brake rod is pivotally arranged on the hydraulic cylinder and connected to the piston. The brake rod can pivot relative to the hydraulic cylinder to drive the piston to move in the hydraulic chamber; Viewing the bicycle in the same direction, the pivot axis of the brake lever is parallel to the axis of the handlebar. A hydraulic brake device for attaching to an open end on an axis of a handlebar, comprising: a body including a hydraulic cylinder, an attachment structure and a piston, the hydraulic cylinder is connected to the attachment structure , the attachment structure has an abutment surface for abutting against the open end on the axis of the handlebar, the hydraulic cylinder has a hydraulic chamber, the long axis of the hydraulic chamber defines the piston is movably located in the hydraulic chamber and is movable along the long axis of the hydraulic chamber in order to be located on a datum plane; and a brake lever is pivotally mounted on the hydraulic cylinder and connected to the piston, and the The pivot axis of the brake lever is perpendicular to the reference plane; wherein, the abutment surface of the attachment structure does not intersect the reference plane.

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