TW201934390A - Brake system - Google Patents

Abstract

A brake system for a bicycle is disclosed. The brake system comprises an actuation mechanism shown as a master cylinder assembly and a brake or brake mechanism for the wheels of the bicycle. The mechanism/assembly comprises (among other parts, components and assemblies) a body or housing, a piston assembly, an actuating lever on a pivot pin, a bladder, a retainer and a primary seal. The bladder is fixed at a first end to the piston and fixed at a second end to the retainer. A reservoir is defined by the piston, the body, and the bladder. Advancement of the piston along the stroke causes the piston to seal against a primary seal and separate the reservoir from a pressure chamber in the body. A retainer may be provided to seal the bladder to the body, act as a piston guide bushing, act as a pivot bushing, and act as a stroke limiter. Upon advancement the piston will contact the primary seal and separate the reservoir from the pressure chamber as the bladder rolls out thus pressurizing the fluid. Stroke is limited at one end by a feature on the retainer which contacts the cam surface on the lever preventing further rotation/movement and at the other end by a stop pin.

Description

Brake system

This application claims the priority of US Provisional Patent Application No. 61 / 880,825 "Brake System", which was filed on September 20, 2013, and the entire contents of which have been incorporated into this application for reference.

The present invention relates to a brake system, and more particularly to a brake system for a bicycle, such as a mountain bike. The invention also relates to a master cylinder assembly (actuation mechanism) of a brake system.

Bicycles are usually equipped with a braking system. The conventional braking system includes a brake mechanism on one wheel (or each wheel), and a brake starting mechanism, so that the rider can selectively select the bicycle when riding the bicycle. Ground braking force is applied to control the bicycle. Conventional technology provides a brake master cylinder combination as a brake starting mechanism on a braking system. The brake starting mechanism is installed on the handlebar of the bicycle and is controlled by the rider's hand. Such conventional combinations include a brake lever for the rider to operate, and the force exerted by the rider on the brake lever is transmitted to the brake device on the corresponding wheel of the bicycle.

In order to improve the configuration of the braking system of a wheeled vehicle such as a bicycle, the present invention not only enables proper operation, but also is relatively small, and / or is relatively easy to manufacture and produce, and is easy to combine, and / Or include fewer parts.

The present invention relates to a brake system having a master cylinder using a fluid. The brake system includes a body, a piston, and a reservoir having a volume for containing a fluid and a reservoir, wherein the airbag is connected to the piston. The body includes a pressure chamber with a capacity, so that (1) the compression advancement of the piston reduces the capacity of the pressure chamber, and (2) the withdrawal of the piston expands the capacity of the pressure chamber. The system includes a seal that seals the piston and the pressure chamber.

The invention also relates to a brake system using a fluid. The brake system includes A body having a chamber with a capacity space and a piston movable within the body chamber. The brake system also includes an airbag, the airbag has a liquid storage tank with a volume space, a handle for activating the piston, and a retainer for fixing the airbag. A first end of the airbag is fixed by a holder, and a second end is fixed by a piston. The retainer seals the airbag to the body; the retainer includes a guide for guiding the piston, and the retainer is used to limit the stroke moving distance when the piston moves.

The invention also relates to a brake system. The brake system includes a body of a chamber, a piston movable in the body, a handle for activating the piston, and a pin on the handle. The frame is used for coupling and fixing the handle in the body, and when the piston is pushed into the chamber when the handle is activated, the rotation of the handle is promoted. The latch includes at least one end section and a generally intermediate section. The middle section of the latch is embossed and has an effective diameter larger than each end section to fix the sleeve to the handle. . The fixing frame includes a clevis.

100‧‧‧Master cylinder combination

110‧‧‧handle

110a‧‧‧end

112‧‧‧adjustment spiral

120‧‧‧ cam

120a‧‧‧cam surface

124‧‧‧Spring

130‧‧‧body / case

132‧‧‧Fixture

140‧‧‧ retainer

142‧‧‧Piston cap

142a‧‧‧cam surface

144‧‧‧Elastic air bag

146‧‧‧Piston

148‧‧‧Return spring

150‧‧‧main seal

160‧‧‧Fastener

162‧‧‧stop pin

164‧‧‧ pivot pin

164a‧‧‧embossed area

182‧‧‧nut

184, 186‧‧‧Installation kit

194‧‧‧pressure chamber

198‧‧‧ liquid storage tank

200‧‧‧pipe or hose

FIG. 1 is a schematic elevation view of a mountain bike with a braking system according to an embodiment of the present invention.

2A is a schematic side view of a starting device / master cylinder combination of a brake system according to an embodiment of the present invention.

2B is an exploded perspective view of a master cylinder assembly of a brake system according to an embodiment of the present invention.

2C is a cut-away perspective view of a master cylinder assembly of a brake system according to an embodiment of the present invention.

FIG. 3 is a schematic top view of a master cylinder assembly of a brake system according to an embodiment of the present invention.

4 is a schematic cross-section view of a master cylinder assembly of a brake system according to an embodiment of the present invention.

5A is a schematic cross-sectional view of a master cylinder assembly of a brake system according to an embodiment of the present invention.

5B is a schematic cross-sectional view of a master cylinder assembly of a brake system according to an embodiment of the present invention.

6A to 6C are schematic cut-away perspective views of a master cylinder assembly operation of a brake system according to an embodiment of the present invention.

7A to 7C are schematic cross-sectional views of a master cylinder assembly operation of a brake system according to an embodiment of the present invention.

8A to 8C are schematic cross-sectional perspective views of a piston assembly of a master cylinder assembly of a brake system according to an embodiment of the present invention in operation.

9 is a schematic perspective view of an airbag of a master cylinder assembly of a brake system according to an embodiment of the present invention.

10A and 10B are perspective views of a holder of a master cylinder assembly of a brake system according to an embodiment of the present invention.

Please refer to FIG. 1 and FIG. 2A, which is a specific embodiment of the present invention, which is a bicycle with a braking system. As shown in FIGS. 1 and 2A, the braking system is controlled by a starting mechanism of a brake master cylinder assembly 100. The braking system shown in FIG. 1 includes a set of braking mechanisms or brakes (e.g., disc brakes) coupled ( Each wheel coupled to the bicycle is activated by a corresponding set of activation mechanisms (eg, an activation mechanism that can operate under the control of the rider). According to other embodiments, the braking system including the master cylinder assembly / device 100 may be set or adjusted for use on various types of wheeled vehicles (e.g., other types of bicycles, electric bicycles, or other cycles, scooters) (scooter)) and so on. As shown in FIG. 1 and FIG. 2A, the master cylinder assembly / device 100 is mounted on the handlebar of the bicycle. Please refer to FIGS. 2B to 2C and 5A at the same time (for example, a configuration using a clamp 132).

The components and assemblies of the brake master cylinder assembly 100, as shown in FIGS. 2B and 2C, the body or housing 130 of the master cylinder assembly 100 provides a mounting 130a for mounting the handle 110 (for example, mounted on the handle 110 end 110a) and) a cam 120 pivoted by a pivot pin 164; the cam 120 is subjected to compressive force by a spring 124 (such as a leaf spring), and the handle 110 is passed through an adjuster screw 112 drive; action of cam 120 is limited by stop pin 162. The anchor 140 inserted into the body or the casing 130 is also fixed to a flange of a fixing frame adjacent to the casing 130 with a pivot pin 164. The retainer 140 provides a bushing for a piston cap 142 mounted on the piston 146 (for example, a cam surface 142a (a portion in contact with the cam surface 120a, not shown) to engage the cam 120 Convex Wheel surface 120a); the piston cover 142 fixes one end of an elastic bladder 144 to the piston 146; the other end of the elastic bladder 144 is mounted on the holder 140; a return spring 148 is mounted on the piston 146; A primary seal 150 and a piston 146 are inserted into the body / housing 130. A mounting clamp 132 fastens the body / housing 130 to a bicycle with a fastener 160 and a nut 182, see FIGS. 1 and 2A (the master cylinder assembly 100 is fixed to Configuration diagram of bicycle handle). Please refer to FIG. 1 and FIG. 2A / B / C again. The figure shows a fastener of a bleed screw for sealing the body / housing 130. A fitting set 184/186 connects and fixes the master cylinder assembly 100 and a tube or hose 200 of a braking device. (As mentioned earlier, a brake can be provided for each wheel.)

As shown in FIGS. 2B and 5A / B, the pivot pin 164 has a knurled section 164a (providing a larger effective diameter), and the pivot pin 164 is fixed in the end 110a of the handle 110 (by a tight fit) The end of the pivot pin 164 helps to pivot the handle 110 in the sleeve 140c of the holder 140 into the fixing frame 130a of the housing 130; and the pivot passage 120b of the cam 120, It then helps to pivot the cam 120 to the pivot pin 164. In this embodiment, the master cylinder assembly 100 has a housing 130 and a handle 110 as an actuator. As shown in FIG. 1, in a brake system of a bicycle, a master cylinder assembly 100 on a steering handlebar is a brake or a braking device connected to a wheel. The master cylinder assembly 100 uses a hydraulic coupling to couple with the brakes. The operation of the handle 110 controls the hydraulic fluid using pressure to make it flow or supply to the brake of a corresponding wheel to a brake device (for example, Disc brakes or other types of brakes), the brake is reached or the braking action is released.

As shown in FIGS. 2A, 2B, and 2C, the handle 110 extends from the body / housing 130 and can be controlled by the rider to achieve the braking action of the bicycle. The handle 110 is installed in the body / housing 130, and rotates with the pivot pin 164 as a fulcrum to push the cam surface 120a of the cam 120, exert a force on a piston cover 142, and drive a piston 146 with an axis by the applied force The axial path moves within a bore of the body / housing 130. The piston 146 is installed in the body / housing 130, and forms a liquid storage tank 198 and a pressure chamber 194 for containing hydraulic fluid, and is enclosed in a hole of the body / housing 130 by a main seal 150. In one embodiment shown in FIGS. 2B to 2C, 6A to 6B, 7A to 7B, and 8A to 8B, the main seal 150 for the piston 146 (for example, an O-ring seal, or the like (Sealed), the device is in the body / housing 130 pressure chamber 194 (Different from the alternative embodiment in which the sealing device can be mounted on the piston body). As shown in FIG. 2C, according to a preferred embodiment, one end of an elastic bladder 144 is sealed to the piston 146 by a piston cover 142; the other end of the elastic bladder 144 is sealed to the body / housing 130 by a retainer 140.

The piston cover 142 moves the piston 146 along the aperture of the body / housing 130 due to the cam actuation of the handle 110. The piston 146 moves under the resistance of an elastic spring 148 provided in the pressure cavity 194 of the body / housing 130. The liquid storage tank 198 and the pressure chamber 194 in the body / housing 130 may be separated from each other, or may be in fluid communication through the movement of the piston 146 within the aperture. When the handle 110 is activated, the piston 146 is in contact with the main seal 150 and pressure is applied by the piston 146 moving along the aperture (counter-pressure counter-pressure against the counter-reset spring 148 and hydraulic fluid transmitted through the pressure chamber 194); The action of the piston 146 pushes the hydraulic fluid to flow from the pressure chamber 194 through the brake line / hose 200 to achieve the braking action corresponding to the braking device (see FIGS. 1 and 8C). When the handle 110 is loosened, the return spring 148 can drive the piston 146 along the aperture, release the pressure on the hydraulic fluid in the pressure chamber 194, and reduce or remove the braking action of the corresponding braking device (see FIGS. 1 and 8A to 8B).

According to an embodiment of the present invention, as shown in FIGS. 2B to 2C, 6A to 6B, 7A to 7B, 8A to 8B, and 10A to 10B, the assembly / device in the embodiment includes a holder 140. As shown in FIGS. 8A and 10B, the holder is arranged to perform various feature combinations.

Referring to FIGS. 2B to 2C and 10A, the retainer 140 can provide an internal aperture. The piston guide bushing surface 140b is shown in the figure for the shaft of the piston cover 142 coupled to the piston 146 for the shaft. To move.

Please refer to FIGS. 10A to 10B again. The holder 140 may provide a set of circular apertures for the pivot pin 164. The figure shows a pivot bushing surface 140c, and the pivot pin 164 is installed on the pivot pin 164. The handle 110 is provided as an axis of the rotary actuation of the handle 110.

As shown in FIGS. 9 and 10A, the holder 140 can provide a seal. The figure shows a balloon sealing surface 140d as an interface for mounting one end of the balloon 144. The other end of the bladder 144 is sealed to the piston 146 to form a chamber containing the gas inside the bladder 144; the outside of the bladder 144 is a hydraulic fluid, and the hydraulic fluid will occupy the inside of the body / housing 130 and outside the bladder 144 A reservoir 198 formed between the outside and the exterior of the piston 146. See Figures 8A to 8C. When the piston 146 moves within its aperture, the airbag 144 It may be retracted (ie, collapsed) as shown in FIG. 8A, or may be in a transition (ie, extended / retracted) as shown in FIG. 8B, or may be as shown in FIG. 8C The display is expanded.

Please refer to FIGS. 2C and 10B. As shown, the holder 140 is a feature (eg, a curved projection, or flange) of the leading edge 140a, and is driven by the handle 110. The cam surface 120a of the cam 120 is engaged as a stop for blocking the cam 120 from the handle 110 (that is, a mechanical stop during contact).

Combination / device operation

As shown in the schematic diagram of the present invention, according to any specific embodiment mentioned, the brake system of the present invention generally includes a device / combination activated by a handle, and a body or a body provided to use a fluid and provide a pressure chamber. A casing, a piston assembly having a piston that can move along a stroke when being advanced / retracted by a handle operation, an airbag, a retainer, and a main seal. A first end of the airbag is fixed to the piston, and a second end is fixed to the holder. The main seal is fixed in the body or housing. A reservoir for containing the fluid is defined by the piston, the body, and the air bag. In basic operation, the advancement of the piston closes the main seal and separates the reservoir from the pressure chamber. When the piston is advanced, the airbag is deployed, and when the piston is withdrawn, the airbag is retracted. The function of the retainer is to seal the airbag to the body, as a piston guide bushing, as a pivot bushing, and as a stroke limiter. When advancing, the piston contacts the main seal and separates the reservoir from the pressure chamber, thus applying pressure to the fluid. The stroke of the piston is limited by a feature on the holder that comes into contact with the cam surface of the cam on the handle to avoid further rotation / movement. When the handle is released, under the pressure of the fluid and assisted by the return spring, the piston will retract / withdraw; a stop pin is in contact with the cam to prevent the piston from further retracting.

According to the specific embodiments shown in Figs. 1, 2A to 2C and 6A to 6B, 7A to 7B and 8A to 8B, the master cylinder combination / starting device includes (in addition to other components and combinations) a body / housing 130, a piston 146, the airbag 144, the holder 140, and the main seal 150. A first end of the airbag 144 is fixed to the piston 146 and a second end is fixed to the holder 140, as shown in FIGS. 2C and 8A to 8C. The main seal 150 is fixed in the body / housing 130, and a liquid storage tank 198 is defined by the outer surface of the body / housing 130, the piston 146, and the airbag 144. A pressure cavity 194 is defined within the interior form of the body / housing 130.

According to a specific embodiment shown in FIGS. 6A to 6B, 7A to 7B, and 8A to 8B, the advancement of the piston 146 closes the main seal 150 and closes the reservoir 198. Separate from the pressure chamber 194. The function of a retainer 140 is to seal the airbag 144 to the body / housing 130; the retainer 140 also serves as a piston guide bushing, as a pivot bushing, and as a restriction for the cam 120 / handle 110 One stroke limiter. See FIGS. 2C, 8C, and 10A to 10B.

The manipulation handle 110 pushes a threaded adjuster to screw against a leaf spring in contact with the cam 120 to cause the cam 120 to rotate with the handle 110. The cam surface 120a of the cam 120 is in contact with the surface 142a of the piston cover 142 pressed to the piston 146. Guided by the piston guide bushing surface 140b of the holder 140, the piston cover 142 and the piston 146 move along the body / housing aperture. When the piston 146 advances within the aperture, one end is connected to the retainer 140 and the other end is connected to the elastic bladder 144 to expand. When advancing, the piston 146 contacts the main seal 150 and separates the liquid storage tank 198 from the pressure chamber 194, and thus presses the hydraulic fluid in the pressure chamber 194. (According to an alternative embodiment, the piston cover and the piston may be integrated instead of separate components.)

8C and 10B, the stroke of the handle 110 is limited by the front edge 140a of the holder 140, which contacts the cam surface 120a of the cam 120 to prevent it from further rotating beyond the engagement / contact point.

When the handle 110 is released, under the pressure of the hydraulic fluid and assisted by the return spring 148, the piston 146 will retract. As shown in FIGS. 6B, 7B, and 8B, the cam 120 will contact the stop pin 162 to prevent the piston 146 from further. return.

As described above, in the specific embodiment of the present invention, various combinations and devices can be adjusted to adjust the implementation and operation of the system / combination.

The structures and configurations of the elements described in this application and shown in the drawings are for illustration purposes only. Although some embodiments of the present invention have been described in detail in this specification, those with ordinary knowledge in the technical field will immediately know after reading this specification that there are many possible modifications that will not significantly deviate from the novelty and content of the content of the present invention. advantage. Accordingly, all such modifications are intended to be included within the scope of this invention. Other substitutions, modifications, changes, and omissions can be added to the design, operating conditions, and configuration of the preferred embodiment and other specific embodiments without departing from the spirit of the present invention.

According to the above, the system and method of the present invention may include conventional technologies (e.g., technologies performed in this configuration), or any other capable of performing the functions and processes / operations shown in the diagrams. Suitable technologies (now or in the future), all such technologies are considered to be within the scope of the description of the invention.

Claims (22)

A brake system having a master cylinder using a fluid includes: (a) a body; (b) a piston; (c) an air bag connected to the piston, the air bag having a capacity space to accommodate a reservoir of fluid A liquid tank; wherein the body includes a pressure chamber having a capacity space, so that (1) the compression of the piston reduces the capacity of the pressure chamber, and (2) the withdrawal of the piston expands the capacity of the pressure chamber; the The system includes a seal that seals the piston and the pressure chamber, and a holder is disposed in the body, wherein the airbag is fixed on the holder. The braking system according to item 1 of the patent application scope, wherein a first end of the airbag is fixed to the piston. The braking system according to item 1 of the scope of patent application, wherein a fixing frame fixture is provided, and the body is fixed to a bicycle with fasteners and nuts. The brake system according to item 3 of the patent application scope, wherein a piston cover is mounted on the piston. The braking system according to item 4 of the patent application scope further includes a handle to activate the piston; wherein the handle includes a cam surface to engage a cam surface on the piston cover. The braking system according to item 5 of the patent application scope, wherein the handle rotates with a pin as a fulcrum, and the pin provides an embossed surface for press-fitting to connect with the handle. A brake system using a fluid includes: (a) a body having a cavity with a capacity space; (b) a piston movable within the cavity of the body; (c) an air bag having a capacity space A liquid storage tank; (d) a handle for activating the piston; (e) a holder for fixing the airbag; wherein a first end of the airbag is fixed by the holder and a second end is fixed by the piston; the The retainer seals the airbag to the body; the retainer includes a guide for guiding the piston; and the retainer is arranged to limit the stroke distance when the piston moves. The brake system according to item 7 of the patent application scope, wherein the handle rotates with a pin as a fulcrum; the pin provides an embossed surface for press-fitting to connect with the handle. The brake system according to item 7 of the patent application scope, wherein the handle is operated by the cam acting on the piston. The brake system according to item 9 of the patent application scope further includes a piston cover on the piston to provide a cam surface to engage a cam surface on an end of the handle. A braking system includes: (a) a body of a chamber; (b) a piston movable within the body; (c) a handle for activating the piston; (d) a latch for The handle is fixed in the body and promotes the rotation of the handle when the handle is activated to push the piston into the chamber; wherein the latch includes at least one end region and a middle region to fix it to the handle. The brake system according to item 11 of the patent application scope, wherein the middle region of the latch has an effective diameter larger than that of each end region. The brake system according to item 11 of the scope of patent application, wherein the middle region of the latch is embossed. The brake system according to item 11 of the scope of patent application, wherein the middle area of the latch is connected to the handle by a press-fit. The brake system according to item 14 of the patent application scope further includes a cam activated by the handle. The braking system according to item 15 of the patent application scope, wherein the cam rotates around the middle region of the latch. The braking system according to item 16 of the patent application, wherein the latch is coupled to the body on a fixing frame. The braking system according to item 17 of the patent application scope, wherein the fixing frame comprises a U-shaped hook. The brake system according to item 16 of the patent application scope further includes an airbag connected to the piston. The braking system according to item 19 of the patent application scope, wherein one end of the airbag is fixed by the retainer, and the other end is fixed by the piston. The braking system as described in claim 20, wherein the activation of the handle pushes the piston into the chamber and reduces the amount of fluid in the chamber. The braking system according to item 16 of the patent application scope further includes a piston cover on the piston to provide a cam surface to engage a cam surface on one end of the handle.