TW201309517A - Brake actuation sensing device of hydraulic brake system - Google Patents

Abstract

The brake actuation sensing device of hydraulic brake system in the present invention comprises a main body which has an oil passage. The present invention further comprises a piston and a magnetic sensor, which are hidden in the main body. The piston is magnetic, and can change its position along with the pressure variation of the hydraulic oil in the oil passage. The magnetic sensor is installed adjacent to the piston, and is electrically connected to an external electrical control device through a conducting wire. The magnetic sensor transmits a control signal by sensing the magnetic force of the piston, so as to start the preset control action.

Description

Brake actuation device for hydraulic brake system

The present invention relates to a vehicle brake system, and more particularly to a brake actuation device for a hydraulic brake system.

The hydraulic brake system used in general vehicles usually includes a brake actuating device for sending a signal when sensing the brake system to act as a preset action for starting the vehicle, such as starting the brake light and cutting off the battery for the vehicle. The power supply of the motor, or setting the vehicle to a startable state.

In order to ensure driving safety, an electric two-wheeled vehicle has a brake automatic power-off relationship for cutting off the power supply of the vehicle battery to the vehicle motor when the vehicle rider grasps the brake handle. Conversely, if the brake is not activated, the battery's power output to the motor is normal.

In the new patent case of the Republic of China Announcement No. M365313 "Induction Structure for Brake Handle Startup", a brake actuation device for a brake system of a hydraulic disc brake type is disclosed. Although the sensing device disclosed in the present invention can achieve the above purpose of use, the magnetic body is disposed adjacent to the magnetic sensor that senses the magnetic body at the brake handle, and the following defects are caused:

1. The distance between the magnetic sensor and the motor is long, causing the length of the wire connecting the two to be too long. In this way, not only the length of the wire is consumed but also the cost is increased, and the excessively long wire increases the difficulty of winding the wire in the vehicle body, and the chance of wire breakage is increased.

2. In order to smoothly move the magnetic body when grasping the brake handle, the magnetic body must be installed at the end of the brake handle, so that the sensing device is only suitable for the specific brake handle of the single electric two-wheeled vehicle. It is difficult to use it for other similar electric brake handles of other electric two-wheeled vehicles.

In view of this, the main object of the present invention is to provide a brake actuation sensing device for a hydraulic brake system that can be installed at any position between the brake handle and the motor for flexibility.

In order to achieve the above object, the brake actuation device of the hydraulic brake system provided by the present invention is disposed on an actuation hydraulic circuit of a hydraulic brake system, and includes a body, a piston and a magnetic sensor. Wherein, the body has an oil passage and a piston chamber; the oil passage forms a hydraulic oil inlet and a hydraulic oil outlet on the body; the piston chamber is in communication with the oil passage; the piston can be along the piston chamber in a first position and a first The reciprocating movement between the two positions is set in the piston chamber, and the piston has magnetic properties; the magnetic sensor is disposed on the body to sense the piston located in the first position, and accordingly generates a signal.

In one embodiment, the body has a chamber adjacent the piston chamber, and the magnetic sensor is disposed in the chamber, wherein the magnetic sensor position is adjustable for movement back and forth. More specifically, the body has a threaded section formed on the inner wall of the chamber, the threaded section is coupled to a nut, and the nut has a uniform aperture, and the magnetic inductor has a through hole through which the wire passes through the nut. An elastic member is further disposed in the chamber, one end of which is opposite to the inner wall of the chamber, and the other end of which is abutted against the magnetic sensor. Thereby, the position of the magnetic sensor can be changed at the same time by adjusting the joint position of the nut.

In an embodiment, an elastic member is disposed in the piston chamber for pushing the piston to move in a predetermined direction. Wherein: when the piston chamber has an open end and a closed end, and a shoulder is formed between the open end and the closed end, when the open end is in communication with the oil passage, the elastic member and the piston are located between the closed end and the shoulder At this time, one end of the elastic member abuts the closed end, and the other end abuts the piston, and the piston abuts the shoulder.

In embodiments where both ends of the piston chamber are in communication with the oil passage and the piston chamber has a shoulder, the resilient member pushes the piston against the shoulder. The sensing device further includes a one-way valve disposed in the piston chamber.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings.

Please refer to the brake actuation device 100 of the hydraulic brake system of the first preferred embodiment of the present invention shown in FIG. 1 to FIG. 5, which is applied to a vehicle, in particular, a hydraulic brake system of an electric two-wheeled vehicle, and is activated. Hydraulic piping is combined. The brake actuation device 100 includes a body 10, a piston 20 and a magnetic sensor 30. The body 10 has an oil passage 12, and two ends of the oil passage 12 are respectively connected to the two oil pipes 1, 2 respectively. In the present embodiment, the oil pipe 1 is connected to a brake handle (not shown) of the electric mobility tool, and the oil pipe 2 is connected to a hydraulic disc brake brake system (not shown); the body 10 has a piston chamber 14 having An open end 14a and a closed end 14b. In the present embodiment, the piston chamber 14 is formed by a vertical section 141 and a horizontal section 142, and a portion of the vertical section 141 connected to the horizontal section 142 is formed with a shoulder 143; in other words, the shoulder 143 is located at the open end 14a to Between the closed ends 14b. One end of the vertical section 141 is the open end 14a and communicates with the oil passage 12; the other end of the vertical section 141 is closed by a blocking member 13. One end of the horizontal section 142 is in communication with the vertical section 141, and the other end of the horizontal section 142 is provided with a screw hole 142a for coupling and closing the nut 15 having a hexagonal counterbore, which constitutes the closed end of the piston chamber 14. 14b.

The body 10 further has a chamber 16 adjacent the horizontal section 142 of the piston chamber 14 and disposed parallel to the horizontal section 142. A threaded section 18 is formed in the inner wall of the chamber 16 in combination with a nut 17 and the nut 17 has a constant hole 17a.

The piston 20 is placed in a horizontal section 142 of the piston chamber 14 having a larger aperture together with an elastic member exemplified by a spring 22. The piston 20 has magnetic properties and is reciprocally movable between a first position P1 shown in FIG. 6 and a second position P2 shown in FIG. 5. One end of the spring 22 abuts the nut 15 (ie, the closed end 14b), the other end abuts the piston 20, and the top thrust of the spring 22 urges the piston 20 against the shoulder 143, even though the piston 20 is subjected to hydraulic pressure from the oil passage 12 In position, the pushing force of the spring 22 always causes the piston 20 to move toward the shoulder 143 as the hydraulic pressure slows or disappears.

The magnetic sensor 30 is placed in the chamber 16 together with an elastic member exemplified by a spring 34. The magnetic sensor 30 has a wire 32. The wire 32 passes through the nut 17 from the through hole 17a, and the end of the wire 32 is electrically connected to the motor of the electric mobility tool (not shown). One end of the spring 34 abuts against the inner wall of the chamber 16, and the other end abuts against the magnetic sensor 30. The continuous action of the spring force on the magnetic inductor 30 by the spring 34 allows the position of the magnetic sensor 30 to be simultaneously changed when the adjustment nut 17 is coupled to the position of the threaded portion 18.

The above is a structural description of the brake actuation device 100 of the hydraulic brake system according to the preferred embodiment of the present invention. When it is transmitted through the oil pipe 1, 2, it is connected to the brake handle and the brake system of the electric travel tool, and the wire of the magnetic sensor 30 is connected. When the motor 32 is electrically connected to the motor, in the state shown in FIG. 5, the piston 20 is held against the shoulder 143 (ie, at the second position P2), and its magnetic range does not cover the detection point 30a of the magnetic sensor 30. This situation indicates that the brake handle is not being gripped, in other words, the power output of the electric mobility tool is normal.

When the brake handle is gripped, the hydraulic pressure generated by the brake lever is transmitted to the piston chamber 14 to act and the thrust piston 20 is moved to the first position P1, as shown in FIG. 6, so that the magnetic force range of the piston 20 includes the magnetic sensor 30. Detection point 30a. At this time, the magnetic sensor 30 sends a number one to a control circuit (not shown), and the control circuit generates a control signal for controlling the vehicle to operate, for example, cutting off the power supply of the vehicle battery to the vehicle motor.

The brake actuation sensing device 100 is manufactured by modular production and has the advantage of being capable of rapid mass production, and can be installed at any position between the brake handle and the brake system through an external oil pipe, for example, close to the vehicle. The position of the motor is to reduce the length of the wire connected to the motor. In this way, not only can the cost reduction effect be obtained, but also the winding of the wire can be made easier, and the interference of the wire on the user's limb can be further prevented to improve the safety of use.

Referring to FIG. 7, the brake actuation device 200 of the second preferred embodiment of the present invention has a body 40, a piston 50 and a magnetic sensor 60 similar to the first embodiment. The difference is that the two ends of the piston chamber 44 are in communication with the oil passage 42. To cooperate with the foregoing structure, the brake actuation device 200 of the second embodiment further includes a one-way valve 70. In detail, the piston chamber 44 includes two parallel vertical sections 441, 442 and a horizontal section 443 communicating with two vertical sections, and one end of each vertical section and the horizontal section is closed by a blocking member. Wherein, the vertical section 441 accommodates the piston 50 and its spring 52, and the piston 50 abuts against a shoulder 444; the vertical section 442 has a tapered opening 442a for the check member 72 of the check valve 70 to abut, and a spring 74 pushes the thrust member 72, whereby the hydraulic oil turbulent in the oil passage 42 can only advance in a single direction. The magnetic sensor 60 is disposed adjacent to the piston 50, which also acts as a basis for transmitting the signal by sensing the magnetic force of the piston 50. The functions of the foregoing brake actuation device 200 are the same as those of the first embodiment, and are not described herein.

The above description is only the preferred embodiment of the present invention, and the equivalent structural changes of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

1, 2. . . Tubing

100. . . Brake actuation sensing device

10. . . Ontology

12. . . Oil road

13. . . Blocking member

14. . . Piston chamber

14a. . . Open end

14b. . . Closed end

141. . . Vertical segment

142. . . Horizontal section

142a. . . Screw hole

143. . . Shoulder

15. . . Nut

16. . . Room

17. . . Nut

17a. . . Through hole

18. . . Thread segment

20. . . piston

twenty two. . . spring

30. . . Magnetic sensor

30a. . . Detection point

32. . . wire

34. . . spring

200. . . Brake actuation sensing device

40. . . Ontology

42. . . Oil road

44. . . Piston chamber

441. . . Vertical segment

442. . . Vertical segment

442a. . . Conical opening

443. . . Horizontal section

444. . . Shoulder

50. . . piston

52. . . spring

60. . . Magnetic sensor

70. . . Check valve

72. . . Check piece

74. . . spring

P1. . . First position

P2. . . Second position

Figure 1 is a perspective view showing the appearance of a first preferred embodiment of the present invention;

Figure 2 is an exploded perspective view of the first preferred embodiment of the present invention;

Figure 3 is a perspective view of the internal structure of the first preferred embodiment of the present invention;

Figure 4 is a cross-sectional view showing the relationship between the oil passage and the piston chamber of the first preferred embodiment;

Figure 5 is a cross-sectional view showing the relationship between the piston and the magnetic inductor of the first preferred embodiment;

Figure 6 is similar to Figure 5, illustrating the piston position movement;

Figure 7 is a cross-sectional view showing the structure of a second preferred embodiment of the present invention.

1, 2. . . Tubing

100. . . Brake actuation sensing device

10. . . Ontology

13. . . Blocking member

142a. . . Screw hole

15. . . Nut

17. . . Nut

17a. . . Through hole

18. . . Thread segment

20. . . piston

twenty two. . . spring

30. . . Magnetic sensor

32. . . wire

34. . . spring

Claims (7)

A brake actuating device for a hydraulic brake system is disposed on an actuating hydraulic line of a hydraulic brake system, comprising: a body having an oil passage and a piston chamber, the oil passage forming a hydraulic oil on the body An inlet and a hydraulic oil outlet, the piston chamber is in communication with the oil passage; a piston is disposed in the piston chamber in a manner reciprocable along the piston chamber between a first position and a second position, and the piston Magnetically; and a magnetic sensor disposed on the body for sensing a piston positioned in the first position and generating a signal accordingly. The brake actuation sensing device of the hydraulic brake system of claim 1, wherein the body has a chamber adjacent to the piston chamber, the magnetic sensor is disposed in the chamber, and the magnetic sensor position is adjustable to move back and forth. The brake actuation sensing device of the hydraulic brake system of claim 2, wherein the body has a threaded section formed on an inner wall of the chamber, the threaded section being coupled to a nut having a through hole, the magnetic inductor having a wire The nut is threaded out of the through hole. The brake actuating device of the hydraulic brake system of claim 3, comprising an elastic member disposed in the chamber, one end abutting the inner wall of the chamber and the other end abutting the magnetic sensor. The brake actuation sensing device of the hydraulic brake system of claim 1, comprising an elastic member disposed in the piston chamber for pushing the piston to move in a predetermined direction. The brake actuation device of the hydraulic brake system of claim 5, wherein the piston chamber has an open end and a closed end, and a shoulder is formed between the open end and the closed end, the open end and the open end The oil passage is connected, and the elastic member and the piston are disposed between the closed end and the shoulder portion, and one end of the elastic member abuts the closed end, and the other end abuts the piston, and the piston abuts the shoulder portion. The brake actuation device of the hydraulic brake system of claim 5, wherein both ends of the piston chamber are in communication with the oil passage, and the piston chamber has a shoulder portion, and the elastic member pushes the piston against the shoulder portion; The sensing device further includes a one-way valve disposed in the piston chamber.