TWI835293B - Bicycle brake device - Google Patents

Abstract

A bicycle brake device includes a main body, a brake lever and a driving assembly. The main body includes a hydraulic tank, a piston and a link. The hydraulic tank has a hydraulic chamber. The piston is movably located in the hydraulic chamber, and the link is connected to piston. The brake lever is pivotally disposed on hydraulic tank and connected to the link. The brake lever is configured to move the piston via the link. The driving assembly includes a driver, an output shaft and at least one cam. The driver is disposed on the hydraulic tank and connected to the output shaft. The cam is fixed to the output shaft and in contact with the link. The driver is configured to rotate the cam via the output shaft so as to force the cam to push the piston via the link. A central axis of the output shaft is perpendicular to and intersects with a central axis of the link.

Description

Bicycle braking device

The present invention relates to a braking device, in particular to a bicycle braking device.

In recent years, the bicycle market has been booming. Whether it is a high-end racing bicycle or a popular bicycle used as a means of transportation and leisure and entertainment, they are all loved by consumers, prompting manufacturers to pay more attention to users' needs for bicycle functions. In the The body materials and equipment functions are constantly improved.

Currently, a brake lever has been developed on the market. In addition to manually operating the brake lever to drive the connecting rod and the piston connected to the connecting rod, it can also drive the connecting rod and the piston connected to the connecting rod electrically. . However, with the current configuration of the brake handle, the process of driving the connecting rod electrically is prone to problems such as unsmoothness and instability, resulting in the piston not being able to increase the pressure of the brake fluid as expected. Therefore, researchers in this field are currently working on solving the aforementioned problems.

The present invention provides a bicycle braking device that allows a connecting rod to be driven smoothly in an electric manner.

A bicycle braking device disclosed in one embodiment of the present invention includes a body, a brake lever and a driving component. The body includes a cylinder, a piston and a connecting rod. The cylinder has a hydraulic chamber, the piston is movably located in the hydraulic chamber, and the connecting rod is connected to the piston. The brake lever is pivotably arranged on the cylinder and connected to the connecting rod. The brake lever is used to drive the piston to move through the connecting rod. The driving component includes a driver, an output shaft and at least one cam. The driver is installed in the cylinder. The driver is connected to the output shaft. At least one cam is fixed on the output shaft and against the connecting rod. The driver is used to rotate the at least one cam through the output shaft. , so that at least one cam pushes the piston through the connecting rod. The central axis of the output shaft is perpendicular to and intersects with the central axis of the connecting rod.

Another embodiment of the present invention discloses a bicycle braking device, which includes a body, a brake lever and a driving component. The body includes a cylinder, a piston and a connecting rod. The cylinder has a hydraulic chamber. The piston is movably located in the hydraulic chamber. The connecting rod includes a first rod body and a second rod body. The first rod body is connected to In the piston, the first rod body has a pushed portion relative to one end of the piston, the second rod body has a pushing portion, and the pushing portion detachably abuts against the pushed portion. The brake pull rod is pivotably arranged on the cylinder and connected to the second rod body. The brake pull rod is used to drive the second rod body so that the pushing part of the second rod body pushes against the pushed part of the first rod body, and Drive the piston to move. The driving component is connected to the first rod, and is used to drive the first rod to push the piston and separate the pushed part from the pushing part.

According to the bicycle braking device disclosed in the above embodiment, the driver of the driving assembly is connected to the output shaft, the cam is fixed to the output shaft and abuts against the connecting rod, and the central axis of the output shaft is perpendicular to and intersects with the central axis of the connecting rod. The configuration allows the connecting rod to be smoothly driven by the cam of the driving assembly, thereby driving the piston to move in the hydraulic chamber, thus ensuring that the piston can increase the pressure of the brake oil as expected.

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

See Figure 1 to Figure 3. FIG. 1 is a schematic three-dimensional view of a bicycle braking device disclosed according to a first embodiment of the present invention. Figure 2 is a partially exploded schematic diagram of Figure 1. FIG. 3 is an exploded schematic view of another part of FIG. 1 .

In this embodiment, the bicycle braking device 1 is, for example, a right brake handle assembly. The bicycle braking device 1 includes a body 10 , a brake lever 20 and a driving component 30 .

Next, please refer to Figures 4 and 5 together with Figures 2 and 3. Figure 4 is a schematic cross-sectional view of Figure 1. FIG. 5 is another schematic cross-sectional view of FIG. 1 .

The body 10 includes a cylinder 11 , a piston 12 and a connecting rod 13 . In addition, the body 10 may also include an oil tank cover 14, two screws 15, a baffle 16, a retaining ring 17 and a biasing member 18.

The cylinder 11 is used to be installed on a handlebar 2 . The cylinder 11 has a hydraulic chamber 111 . In addition, the cylinder 11 may also have an oil storage chamber 112, a communication hole 113, an oil outlet hole 114 and a receiving groove 115. The oil storage chamber 112 is located above the hydraulic chamber 111 . That is to say, when the cylinder 11 is installed on the handlebar 2 of a bicycle placed on the ground, the oil storage chamber 112 is farther from the ground than the hydraulic chamber 111 . The hydraulic chamber 111 is connected to the oil storage chamber 112 through the communication hole 113 , and the oil outlet hole 114 is connected to the hydraulic chamber 111 from the side opposite to the opening of the hydraulic chamber 111 . The oil outlet hole 114 is connected to the front brake caliper (not shown) through the oil pipe 3, for example. The receiving groove 115 is located on one side of the hydraulic chamber 111 relative to the oil outlet hole 114 . The oil tank cover 14 is fixed to the cylinder 11 through two screws 15 to cover the oil storage chamber 112 . The baffle 16 is installed at the opening of the hydraulic chamber 111 and is positioned through the buckle 17 . The biasing member 18 is, for example, a compression spring. The biasing member 18 is located in the hydraulic chamber 111 and is closer to the oil outlet hole 114 than the piston 12 . The biasing member 18 is used to force the piston 12 to move in a direction away from the oil outlet hole 114 . force.

The piston 12 is movably located within the hydraulic chamber 111 . The connecting rod 13 may include a first rod body 131 and a second rod body 132 . The first rod 131 passes through the buckle 17 and the baffle 16. One end of the first rod 131 is located in the hydraulic chamber 111 and connected to the piston 12, and the other end of the first rod 131 is located in the receiving groove 115. And can have a pushed portion 1311. The second rod body 132 may have a push portion 1321 and a guide portion 1322. The guide portion 1322 protrudes from one side of the push portion 1321 and surrounds a guide groove 1323. The pushed portion 1311 of the first rod 131 is located in the guide groove 1323 of the second rod 132 , and the pushed portion 1311 of the first rod 131 detachably abuts the pushed portion 1311 of the second rod 132 .

In this embodiment, the bicycle braking device 1 may further include a first pivot 40 and a second pivot 50 . The brake lever 20 may include a swing member 21 and a pull handle 22 . The rocking member 21 is at least partially located in the receiving groove 115 , and the rocking member 21 may have two opposite ends 211 and 212 . The end 211 of the swing member 21 is pivoted through the first pivot 40 at an end of the second rod 132 relative to the first rod 131 . The handle 22 may have two opposite ends 221 and 222. The end 212 of the swing member 21 and the end 221 of the handle 22 are pivoted to the cylinder 11 through the second pivot 50 .

In this embodiment, the rocking member 21 may also have a first resisting portion 213 . The first resisting portion 213 protrudes from the end portion 212 and is located on one side of the axis P of the swing member 21 pivoting relative to the cylinder 11 . In addition, the brake lever 20 may also include a first adjusting screw 23 and a biasing member 24 . The handle 22 may have a screw hole 223 , and the screw hole 223 is a through hole and corresponds to the first resisting portion 213 of the rocking member 21 . The first adjustment screw 23 is, for example, a hand screw. The first adjusting screw 23 is screwed into the screw hole 223 of the pulling handle 22 , and one end of the first adjusting screw 23 passes through the screw hole 223 and abuts against the first resisting portion 213 . The biasing member 24 is, for example, a compression spring. The opposite ends of the biasing member 24 are respectively against the swing member 21 and the pulling handle 22. The biasing member 24 is used to apply a force to the pulling handle 22 to move the first adjusting screw. 23 normally abuts the first resisting portion 213 without the action of other external forces.

In this embodiment, by turning the first adjusting screw 23, the handle 22 can be pivoted relative to the cylinder 11, so that the end 222 of the handle 22 can be relatively close to the handlebar 2 in the direction D1 or in the opposite direction of the direction D1. Relatively far away from the handlebar 2, and adjust the initial position of the handle 22 when it is not pressed.

It should be noted that the first adjusting screw 23 is an optional component. If there is no need to adjust the initial position of the pull handle, the brake pull rod may not have a first adjustment screw, and correspondingly the first abutment parts of the biasing member and the swing member may be omitted, and the brake pull rod may be integrally formed. structure.

In this embodiment, the body 10 may further include an assembly rod 19 located in the receiving groove 115 . The rocking member 21 may also have a second abutment portion 214 . The second resisting portion 214 protrudes from the end portion 212 and is located on the other side of the axis P of the swing member 21 relative to the cylinder 11 , and is opposite to the first resisting portion 213 . The second abutting portion 214 of the rocking member 21 may have a screw hole 2141 , and the screw hole 2141 is aligned with the assembly rod 19 . The brake lever 20 may also include a second adjustment screw 25. The second adjustment screw 25 is, for example, a hand screw. The second adjustment screw 25 is screwed into the screw hole 2141 of the second abutment portion 214 , and one end of the second adjustment screw 25 passes through the screw hole 2141 to abut against the assembly rod 19 .

In this embodiment, by turning the second adjustment screw 25, the end 212 of the swing member 21 can be pivoted relative to the cylinder 11 in the direction D2 or the opposite direction of the direction D2, so that the end 222 of the pulling handle 22 can be relatively pivoted. Close to the handlebar 2 or relatively far away from the handlebar 2, the initial position of the integral brake lever 20 when not pressed can also be adjusted, and the end 212 of the swing member 21 can be driven through the first rod body 131 and the second rod body 132 The piston 12 is relatively close to the oil outlet hole 114 or far away from the oil outlet hole 114, and the initial position of the piston 12 when not driven is adjusted.

It should be noted that the second adjustment screw 25 is an optional component. If there is no need to adjust the initial position of the integral brake lever and piston, the brake lever may not have a second adjustment screw, and correspondingly the second abutment portion of the rocking member may be omitted.

In this embodiment, the bicycle braking device 1 may further include a biasing member 80 . The biasing member 80 is, for example, a torsion spring. One end of the biasing member 80 is fixed on the assembly rod 19 of the cylinder 11 , and the other end of the biasing member 80 is fixed on the swinging member 21 . The biasing member 80 is used to apply force to the integral brake lever 20 to move toward the initial position through the rocking member 21 .

It should be noted that the biasing member 80 is an optional component. If the force exerted by the biasing component on the piston is sufficient to drive the operated brake lever back to its initial position through the first rod body and the second rod body, the biasing component and the assembly rod fixed by the biasing component can be omitted.

The driving assembly 30 includes a driver 301, an output shaft 302 and two cams 303. In addition, the driving assembly 30 may also include a housing 304, a plurality of screws 305, a plurality of transmission gears 306, two bearings 307, a plurality of washers 308, a control circuit board 309, an encoder 310 and a wireless communicator 311.

The housing 304 of the driving assembly 30 may include an assembled base body 3041 and a cover body 3042. The base 3041 may have a positioning groove 30411, and the cylinder 11 may also have a positioning protrusion 116. The positioning bump 116 of the cylinder 11 is located in the positioning groove 30411 of the base 3041. The base 3041 is fixed to the cylinder 11 through these screws 305, and the hydraulic chamber 111 is located in the oil storage chamber 112 and the housing 304 of the driving assembly 30 between.

In this embodiment, through the positioning bumps 116 of the cylinder 11 and the positioning grooves 30411 of the base 3041, it is possible to fix the screws 305 before the screws 305 are locked into the cylinder 11 during the assembly of the base 3041 to the cylinder 11. First, the effect of positioning the base 3041 is provided to facilitate the smooth locking of the subsequent screws 305 into the cylinder 11. It should be noted that the positioning groove 30411 of the base 3041 and the positioning protrusion 116 of the cylinder 11 are optional structures. In other embodiments, the base body may have no positioning grooves, and the cylinder body may have no positioning protrusions.

In addition, the base 3041 is not limited to being fixed to the cylinder 11 via screws 305 . In other embodiments, the base body may be integrally connected to the cylinder body.

The driver 301 is, for example, a motor. The driver 301 and these transmission gears 306 are located in the accommodation space 3043 formed by the base 3041 and the cover 3042 of the housing 304.

In this embodiment, the cylinder 11 may also have two through holes 117 located on opposite sides of the accommodation groove 115 , and the two bearings 307 are respectively provided in the two through holes 117 . The base 3041 may also have a through hole 30412 connected to the accommodation space 3043. The first rod body 131 may have a through groove 1312 and an annular flange 1313 closer to the piston 12 than the through groove 1312. Wherein, the through groove 1312 is similar to an elliptical through groove.

The output shaft 302 passes through the through hole 30412 of the base body 3041, the through groove 1312 of the first rod body 131 and the two bearings 307, and has different parts located in the accommodation space 3043 of the housing 304 and the accommodation groove 115 of the cylinder 11. . In addition, the central axis A1 of the output shaft 302 is perpendicular to and intersects with the central axis A2 of the first rod body 131 of the connecting rod 13 . The driver 301 is connected to the output shaft 302 through these transmission gears 306, and the driver 301 is used to drive the output shaft 302 to rotate relative to the base 3041 and the cylinder 11 through these transmission gears 306.

The two cams 303 are located in the receiving groove 115 of the cylinder 11 and fixed on the output shaft 302 . The two cams 303 are respectively located on two opposite sides of the first rod body 131 and abut against the annular flange 1313 of the first rod body 131 .

In this embodiment, a washer 308 sleeved on the output shaft 302 is disposed between any two adjacent ones of the two bearings 307 , the two cams 303 and the first rod 131 . Thereby, the smooth rotation of the second cam 303 is ensured.

The control circuit board 309, the encoder 310 and the wireless communicator 311 are arranged in the accommodation space 3043 of the housing 304. The control circuit board 309 is electrically connected to the driver 301 . The encoder 310 is electrically connected to the control circuit board 309 and corresponds to the output shaft 302 . The encoder 310 is used to sense the angular position of the output shaft 302 . For example, the wireless communicator 311 is disposed on the control circuit board 309 and is electrically connected to the control circuit board 309 .

In this embodiment, the control circuit board 309 may have two electrical connectors 3091 and 3092, for example. The electrical connector 3091 is, for example, used to connect a battery 4. The battery 4 provides the power required by the control circuit board 309, the driver 301, the encoder 310 and the wireless communicator 311. In this embodiment, the bicycle is, for example, an electric-assisted bicycle, and the battery 4 is not only a battery that provides the power required by the driving assembly 30, but also a battery that provides the power required by the electric-assisted bicycle, but it is not limited to this. . In other embodiments, the battery may be one that provides only the power needed to drive the assembly, and the battery that provides the power needed for the electrically assisted bicycle may be another battery. In such a configuration, the battery that provides the power required by the driving assembly may be detachably disposed in the housing of the driving assembly, or may be detachably disposed on the cylinder of the body.

In this embodiment, the bicycle braking device 1 may further include a magnet 60 and a sensor 70 . The magnet 60 is provided on the piston 12 . The sensor 70 is, for example, a magnetic reed sensor. The sensor 70 is disposed on the cylinder 11 and is electrically connected to the electrical connector 3092 of the control circuit board 309 . The sensor 70 is used to sense the movement of the piston 12, and causes the wireless communicator 311 to send a wireless signal through the control circuit board 309.

In this embodiment, the piston 12 can be actuated manually as well as electrically. The process of manually actuating the piston 12 will be introduced below. Please refer to Figure 6 and Figure 7 first. FIG. 6 is a schematic cross-sectional view of the brake lever in FIG. 4 after it is actuated. FIG. 7 is a schematic cross-sectional view of the brake lever in FIG. 5 after it is actuated.

The user can press the handle 22 of the brake lever 20 and use the first adjustment screw 23 to drive the end 212 of the swing member 21 to pivot relative to the cylinder 11 so that the end 211 of the swing member 21 is pushed by the second rod 132 The resisting portion 1321 pushes against the pushed portion 1311 of the first rod 131 to move the first rod 131 relative to the output shaft 302, thereby driving the piston 12 to move toward the oil outlet hole 114 to generate oil pressure. This oil pressure is transmitted to the front brake caliper through oil pipe 3 to brake the front wheel.

During the movement of the piston 12, the sensor 70 senses the movement of the piston 12 to cause the wireless communicator 311 to transmit a wireless signal to an external electronic device (not shown) through the control circuit board 309. The external electronic device is, for example, a central control system of a bicycle. The central control system not only communicates wirelessly with the bicycle braking device 1 (right brake handle assembly) of this embodiment, but also communicates wirelessly with the left brake handle assembly (not shown). The left brake handle assembly may have the same or different configurations as the bicycle braking device 1 , for example. After the central control system receives this wireless signal, it will send an actuation signal to the left brake handle assembly, causing the left brake handle assembly to operate to activate the rear brake caliper (not shown) to brake the rear wheels to reduce the front and rear wheels. wheel speed difference between.

Similarly, when the brake lever of the left brake lever assembly is operated, the piston in the cylinder of the left brake lever assembly is driven to generate oil pressure that drives the rear brake caliper. At this time, the wireless communicator of the left brake handle assembly transmits a wireless signal to the central control system because the sensor senses the movement of the piston. Then, the central control system sends an actuation signal to the bicycle braking device 1 accordingly, causing the bicycle braking device 1 to operate to activate the front brake caliper to brake the front wheel to reduce the wheel speed difference between the front and rear wheels.

For details, please refer to FIGS. 8 and 9 . FIG. 8 is a schematic cross-sectional view of the cam in FIG. 4 pushing against the first rod body. Figure 9 is a schematic cross-sectional view of the cam in Figure 5 pushing against the first rod body.

When the wireless communicator 311 of the driving assembly 30 of the bicycle brake device 1 receives an actuation signal from the central control system, the control circuit board 309 starts the operation of the driver 301 according to the actuation signal. The driver 301 is driven to the output shaft 302 through the drive gears 306, so that the output shaft 302 and the two cams 303 fixed to the output shaft 302 rotate together. During the rotation of the second cam 303, the second cam 303 pushes against the annular flange 1313 of the first rod 131, thereby driving the first rod 131 to move the piston 12 connected to the first rod 131 to generate oil pressure for actuating the front brake caliper, and to separate the pushed portion 1311 of the first rod 131 from the pushing portion 1321 of the second rod 132.

In this way, manually operating the brake lever of one of the two brake handle assemblies can not only actuate the brake caliper connected to the operated brake handle assembly, but also drive the other brake handle assembly in an electric manner. Activate the other brake caliper to provide auxiliary braking.

In this embodiment, the driver 301 of the driving assembly 30 is connected to the output shaft 302. The two cams 303 are fixed on the output shaft 302 and abut against the annular flange 1313 of the first rod body 131 and the central axis of the output shaft 302. The arrangement of A1 perpendicular to and intersecting the central axis A2 of the first rod body 131 allows the first rod body 131 to be driven smoothly by the driving assembly 30 and drives the piston 12 to move in the hydraulic chamber 111, thus ensuring that the piston 12 can Increase brake fluid pressure as expected.

In addition, in the process of the two cams 303 pushing against the first rod 131, the resultant force (shown by arrow F) of the two cams 303 pushing against the first rod 131 is exerted along the central axis A2 of the first rod 131. The first rod body 131 can thereby further improve the smoothness with which the first rod body 131 is driven.

It should be noted that the number of cams 303 is not limited to two. In other embodiments, the drive assembly may include only a cam. Under such a configuration, the output shaft does not need to pass through the first rod body, so that the first rod body does not need to have a grooved structure, and the flange of the first rod body does not need to be annular.

On the other hand, the pushing portion 1321 of the second rod body 132 of the connecting rod 13 can detachably abut against the pushed portion 1311 of the first rod body 131, and the driving assembly 30 can drive the first rod body 131, and The arrangement of separating the pushed portion 1311 of the first rod 131 from the pushing portion 1321 of the second rod 132 allows the first rod 131 to be driven without driving other components (such as the second rod 132 , swing member 21 and pull handle 22), so the required output force of the driver 301 can be reduced.

In addition, the guide portion 1322 of the second rod 132 is used to guide the pushed portion 1311 of the first rod 131 when the first rod 131 moves relative to the second rod 132 . However, it should be noted that the guide portion 1322 of the second rod body 132 is an optional structure and can be omitted in other embodiments.

Furthermore, the pushing portion 1321 of the second rod body 132 of the connecting rod 13 is not limited to the pushed portion 1311 that can detachably abut against the first rod body 131 . If the output force of the driver used is sufficient, the second rod body and the first rod body of the connecting rod can be integrally connected and inseparable, so that the first rod body does not need to have a pushed part and a second rod The body does not need to have a push-up part.

The above-mentioned central control system sends the activation signal of the actuator 301 to the wireless communicator 311 based on the movement of the piston in the cylinder of the left brake handle assembly, but is not limited to this. In other embodiments, the central control system may send an actuation signal for the actuator to the wireless communicator based on the excessive change in wheel speed of the rear wheel sensed by the wheel speed sensor.

In this embodiment, the communication between the control circuit board 309 and the central control system is wireless, but it is not limited to this. In other embodiments, wired communication may be used between the control circuit board and the central control system. For example, the central control system can be electrically connected to the electrical connector of the control circuit board through a cable. In this way, the driving component can omit the wireless communicator, and the signal can be transmitted between the central control system and the control circuit board in a wired manner through the cable, and the power supplied to the central control system can also be provided to the control circuit board and control through the cable. Components that are electrically connected to a circuit board.

It should be noted that the encoder 310 is an optional component. In other embodiments, the drive assembly may be encoderless. In addition, the driving assembly 30 is not limited to including the transmission gear 306 . In other embodiments, the drive assembly may be gearless and the driver may directly drive the output shaft. Furthermore, the bearing 307 and the washer 308 are also optional components. In other embodiments, the drive assembly may be without bearings and washers.

According to the bicycle braking device disclosed in the above embodiment, the driver of the driving assembly is connected to the output shaft, the two cams are fixed on the output shaft and abut against the annular flange of the first rod body, and the central axes of the output shaft are perpendicular to and intersect with each other. The arrangement on the central axis of the first rod allows the first rod to be smoothly driven by the driving component and drives the piston to move in the hydraulic chamber, thus ensuring that the piston can increase the pressure of the brake oil as expected.

Furthermore, in the process of the two cams pushing against the first rod, the resultant force of the two cams pushing against the first rod is applied to the first rod along the central axis of the first rod, thereby making the first rod The smoothness of the body being driven is further improved.

In addition, the pushing portion of the second rod body of the connecting rod can detachably abut against the pushed portion of the first rod body, and the driving assembly can drive the first rod body, so that the pushed portion of the first rod body The configuration of the pushing part that is separated from the second rod body allows the first rod body to be driven without driving other components (such as the second rod body, the rocking member and the pull handle), so the required driver can be reduced. output force.

Although the present invention has been disclosed in the foregoing preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the similar art can make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention is The scope of patent protection for an invention shall be determined by the scope of the patent application attached to this specification.

1: Bicycle braking device 2: Handlebar 3: Oil pipe 4:Battery 10:Ontology 11:Cylinder block 111:Hydraulic chamber 112:Oil storage chamber 113:Connecting hole 114:Oil outlet 115: Accommodation groove 116: Positioning bump 117:Through hole 12:Piston 13: Connecting rod 131:First rod body 1311: Recommended Department 1312:Through groove 1313: Annular flange 132:Second rod body 1321:Pushing Department 1322: Guidance Department 1323:Guide slot 14: Oil tank cover 15:Screw 16:Block 17:Buckle 18:Biasing parts 19:Assembly rod 20:Brake lever 21:Swing piece 211,212: End 213:First contact part 214:Second abutment 2141:Screw hole 22: handle 221,222: End 223:Screw hole 23:First adjustment screw 24: Bias piece 25: Second adjustment screw 30:Drive components 301: drive 302:Output shaft 303:Cam 304: Shell 3041:Base body 30411: Positioning groove 30412:Perforation 3042: Cover 3043: Accommodation space 305:Screw 306:Transmission gear 307:Bearing 308: Washer 309:Control circuit board 3091,3092: Electrical connector 310:Encoder 311:Wireless communicator 40:First pivot 50:Second pivot 60:Magnet 70: Sensor 80: Bias piece P: axis D1, D2: direction A1,A2: axis F: Arrow

FIG. 1 is a schematic three-dimensional view of a bicycle braking device disclosed according to a first embodiment of the present invention. Figure 2 is a partially exploded schematic diagram of Figure 1. FIG. 3 is an exploded schematic view of another part of FIG. 1 . Figure 4 is a schematic cross-sectional view of Figure 1. FIG. 5 is another schematic cross-sectional view of FIG. 1 . FIG. 6 is a schematic cross-sectional view of the brake lever in FIG. 4 after it is actuated. FIG. 7 is a schematic cross-sectional view of the brake lever in FIG. 5 after it is actuated. Figure 8 is a schematic cross-sectional view of the cam in Figure 4 pushing against the first rod body. Figure 9 is a schematic cross-sectional view of the cam in Figure 5 pushing against the first rod body.

3: Oil pipe

4:Battery

11: Cylinder body

12:Piston

13: Connecting rod

131:First rod body

1311: Recommended Department

1312:Through groove

1313: Annular flange

132:Second rod body

1321:Pushing Department

1322: Guidance Department

1323:Guide slot

14: Oil tank cover

15:Screw

16:Block

17:Buckle

18:Biasing parts

19:Assembly rod

20:Brake lever

21:Swing piece

211,212: End

213:First contact part

214:Second abutment

2141:Screw hole

22: handle

221,222: End

223:Screw hole

23:First adjustment screw

24: Bias piece

25: Second adjustment screw

302:Output shaft

303:Cam

304: Shell

305:Screw

307:Bearing

308: Washer

40:First pivot

50:Second pivot

60:Magnet

70: Sensor

80: Bias piece

Claims (15)

A bicycle braking device includes: a body including a cylinder, a piston and a connecting rod, the cylinder has a hydraulic chamber, the piston is movably located in the hydraulic chamber, and the connecting rod is connected to the piston; a brake lever, pivotably disposed on the cylinder and connected to the connecting rod, the brake lever is used to drive the piston to move through the connecting rod; and a drive assembly including a driver, an output shaft and at least one cam , the driver is arranged on the cylinder, the driver is connected to the output shaft, the at least one cam is fixed on the output shaft and against the connecting rod, the driver is used to rotate the at least one cam through the output shaft to make The at least one cam pushes the piston through the connecting rod; wherein, the central axis of the output shaft is perpendicular to and intersects with the central axis of the connecting rod. The bicycle braking device of claim 1, wherein the connecting rod includes a first rod and a second rod, the first rod is connected to the piston, and one end of the first rod relative to the piston has a A pushed part, the second rod body has a push part, the push part can detachably abut against the pushed part, the brake pull rod is connected to the second rod body, the brake pull rod is used to drive the third Two rods, so that the pushing part of the second rod pushes against the pushed part of the first rod to drive the piston to move, the at least one cam abuts the first rod, and the driver It is used to rotate the at least one cam through the output shaft, so that the at least one cam drives the first rod to push the piston and separate the pushed part from the pushing part. The bicycle braking device according to claim 2, wherein the second rod body further has a guide portion protruding from one side of the pushing portion and surrounding a guide groove, and the pushed portion Located in the guide groove. The bicycle braking device of claim 1, wherein the connecting rod has a through groove and an annular flange, the annular flange is closer to the piston than the through groove, and the output shaft passes through the through groove of the connecting rod. , the number of the at least one cam is two, the two cams are respectively located on opposite sides of the connecting rod, the two cams abut against the annular flange, and the resultant force of the two cams pushing against the connecting rod moves along the connecting rod. The central axis of the rod is given to the connecting rod. The bicycle braking device of claim 1, wherein the drive component further includes a control circuit board and a plurality of transmission gears, the driver is a motor, the control circuit board is electrically connected to the driver, and the driver passes through the transmission gears connected to the output shaft. The bicycle braking device according to claim 5, further comprising a sensor, which is disposed on the cylinder and electrically connected to the control circuit board, and the sensor is used to sense the movement of the piston, and A signal is transmitted through the control circuit board in a wired or wireless manner. The bicycle braking device of claim 5, wherein the driving component further includes an encoder, the encoder is electrically connected to the control circuit board and corresponds to the output shaft, and the encoder is used to sense the angle of the output shaft. Location. The bicycle braking device as claimed in claim 1, wherein the driving component further includes a housing, the driver and part of the output shaft are located in the housing, and the housing is detachably assembled to the cylinder. The bicycle braking device of claim 8, wherein the cylinder further has an oil storage chamber connected to the hydraulic chamber, and the hydraulic chamber is located between the oil storage chamber and the housing of the driving assembly. The bicycle braking device of claim 8, wherein the housing has a positioning groove, the cylinder has a positioning protrusion, and the positioning protrusion of the cylinder is located in the positioning groove of the housing. The bicycle braking device according to claim 1 further includes a biasing member, the biasing member is arranged on the brake lever, and the biasing member is used to apply force to the brake lever to move toward an initial position. A bicycle braking device includes: a body, including a cylinder, a piston and a connecting rod. The cylinder has a hydraulic chamber, the piston is movably located in the hydraulic chamber, and the connecting rod includes a first rod. body and a second rod body, the first rod body is connected to the piston, the first rod body has a pushed part relative to one end of the piston, the second rod body has a pushing part, the pushing part detachably abuts against the pushed portion; a brake lever is pivotably provided on the cylinder and connected to the second rod body, and the brake lever is used to drive the second rod body to make the second rod body The pushing part of the rod body pushes against the pushed part of the first rod body, thereby driving the piston to move; and a driving component connected to the first rod body, the driving component is used to drive the first rod body , to push the piston and separate the pushed part from the pushing part. The bicycle braking device as claimed in claim 12, wherein the driving component includes a driver, an output shaft and at least one cam, the driver is arranged on the cylinder, the driver is connected to the output shaft, and the at least one cam is fixed on the The output shaft is against the first rod, and the driver is used to rotate the at least one cam through the output shaft, so that the at least one cam pushes the piston through the first rod. The bicycle braking device of claim 13, wherein the first rod body has a through groove and an annular flange, the annular flange is closer to the piston than the through groove, and the output shaft passes through the first rod body of the through groove, the number of the at least one cam is two, the two cams are located on opposite sides of the first rod body, the two cams abut against the annular flange, and the two cams push against the first The resultant force of the rod body is applied to the first rod body along the central axis of the first rod body. The bicycle braking device of claim 12, wherein the second rod body further has a guide portion protruding from one side of the pushing portion and surrounding a guide groove, and the pushed portion Located in the guide groove.

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