CN201158378Y - Anti-lock braking system - Google Patents

Abstract

An anti-lock brake system comprises an oil pressure control mechanism, a brake master cylinder, a brake caliper, an electromagnetic coil, a metal valve body, an electronic control unit, a motor, a pushing rotating shaft, a plunger, a first one-way leather cup, a fixing column and a second one-way leather cup. The oil pressure control mechanism is provided with an oil inlet, an oil outlet, a main oil duct and an auxiliary oil duct. The main oil duct is connected with the oil inlet and the oil outlet. The auxiliary oil duct is communicated with the main oil duct and is connected with the oil inlet and the oil outlet. The metal valve body is movably arranged in the main oil duct and the electromagnetic coil and is provided with a hollow oil duct and a connecting port. The connecting port is communicated with the hollow oil passage and selectively communicated with the oil inlet. The hollow oil passage is communicated with the oil outlet and is communicated with the oil inlet through the connecting port. A clearance is arranged between the metal valve body and the inner wall of the main oil duct.

Description

Anti-lock braking system

technical field

The utility model relates to an anti-lock brake system, in particular to an anti-lock brake system with a simplified structure.

Background technique

Generally speaking, some vehicles are now equipped with an anti-lock braking system to prevent the wheels of the vehicle from locking and slipping during emergency braking, thereby preventing the vehicle from losing control.

However, the current anti-lock braking system has various types and the structure is too complicated, which makes the manufacturing cost of the anti-lock braking system remain high.

Utility model content

The utility model has the advantage of providing an anti-lock braking system with simple structure and low manufacturing cost.

The utility model basically adopts the features described in detail below in order to solve the above-mentioned problems.

That is to say, the purpose of the utility model is achieved in that the anti-lock braking system includes an oil pressure control mechanism, which has an oil inlet, an oil outlet, a main oil passage and an auxiliary oil passage, wherein the The main oil passage connects the oil inlet and the oil outlet, the auxiliary oil passage communicates with the main oil passage, and connects the oil inlet and the oil outlet, and the oil inlet, the oil outlet, the main The oil passage and the auxiliary oil passage contain brake oil; a brake master cylinder is connected to the oil inlet; a brake caliper is connected to the oil outlet; an electromagnetic coil is fixed in the oil pressure control mechanism, and Adjacent to the main oil passage; a metal valve body is set in the main oil passage and the electromagnetic coil in a movable manner, and has a hollow oil passage and a connection port, wherein the connection port communicates with the hollow oil passage and selectively communicate with the oil inlet, the hollow oil passage communicates with the oil outlet, and communicates with the oil inlet through the connection port, and the metal valve body and the inner wall of the main oil passage There is a gap between them; a first elastic element is connected between the metal valve body and a wall of the oil pressure control mechanism to provide resilience to the metal valve body; an electronic control unit is electrically connected to The electromagnetic coil; a motor, connected to the oil pressure control mechanism, and has an output shaft; a thrust shaft, connected to the output shaft in an eccentric manner, and located in the oil pressure control mechanism; a plunger, set in the auxiliary oil passage in a movable manner, and abut against the thrust rotating shaft; a first one-way cup, sleeved on the plunger, and abut against the inner wall of the auxiliary oil passage; A fixed column is fixed in the oil pressure control mechanism and extends in the auxiliary oil passage; a second one-way cup is sleeved on the fixed column and abuts against the auxiliary oil passage Inner wall, wherein, the sheathing direction of the second one-way cup is the same as the sheathing direction of the first one-way cup; and a second elastic element connected between the plunger and the fixing post for Provide resilience to the plunger.

Meanwhile, the anti-deadlock braking system according to the present invention further includes a wheel speed sensor electrically connected to the electronic control unit.

In this utility model, it further includes a first oil pipe and a second oil pipe, wherein the first oil pipe is connected between the brake master cylinder and the oil inlet, and the second oil pipe is connected between the brake caliper and the The brake oil is contained between the oil outlets, the first oil pipe and the second oil pipe.

The utility model has the advantage of simplifying the structure, thereby reducing its manufacturing cost.

Description of drawings

Fig. 1 is a partial section and plan view showing the anti-lock braking system of the present invention;

Fig. 2 is a schematic diagram showing the A-A section according to Fig. 1;

Fig. 3 is a schematic cross-sectional view showing the oil pressure control mechanism of the anti-lock braking system of the present invention in an operating state;

Fig. 4 is a schematic cross-sectional view showing another operating state of the oil pressure control mechanism of the anti-lock braking system of the present invention; and

FIG. 5 is a schematic cross-sectional view showing the oil pressure control mechanism of the anti-lock braking system of the present invention in another operating state.

Symbol Description

100～anti-lock braking system

110～Oil pressure control mechanism

111～Oil inlet

112～Oil outlet

113～Main oil passage

114～Auxiliary oil passage

115～wall body

120～brake master cylinder

125～the first oil pipe

130～brake calipers

135～second oil pipe

14～Electromagnetic coil

145～the first elastic element

150～Metal valve body

151～hollow oil passage

152～connection port

160～electronic control unit

165～Wheel speed sensor

170～motor

171～output shaft

180～resistance shaft

185～Plunger

190～The first one-way leather bowl

192～fixed column

194～Second one-way cup

196～second elastic element

G～gap

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail in conjunction with the accompanying drawings.

1 and 2, the anti-lock braking system 100 of this embodiment mainly includes a hydraulic control mechanism 110, a brake master cylinder 120, a first oil pipe 125, a brake caliper 130, a second oil pipe 135, An electromagnetic coil 140, a first elastic element 145, a metal valve body 150, an electronic control unit (ECU) 160, a wheel speed sensor 165, a motor 170, a push shaft 180, a plunger 185, a first A one-way leather cup 190 , a fixing post 192 , a second one-way leather cup 194 and a second elastic element 196 .

As shown in FIG. 1 , the oil pressure control mechanism 110 has an oil inlet 111 , an oil outlet 112 , a main oil passage 113 and an auxiliary oil passage 114 . The main oil passage 113 is connected to the oil inlet 111 and the oil outlet 112 . The auxiliary oil passage 114 is connected to the main oil passage 113 , and the auxiliary oil passage 114 is also connected to the oil inlet 111 and the oil outlet 112 . In addition, brake fluid (not shown) is contained in the oil inlet 111 , the oil outlet 112 , the main oil passage 113 and the auxiliary oil passage 114 .

The brake master cylinder 120 is connected to the oil inlet 111 of the oil pressure control mechanism 110 . In more detail, the first oil pipe 125 is connected between the master brake cylinder 120 and the oil inlet 111 .

The brake caliper 130 is connected to the oil outlet 112 of the oil pressure control mechanism 110 , and the brake caliper 130 can be disposed on a brake disc (not shown) of a wheel (not shown). In more detail, the second oil pipe 135 is connected between the brake caliper 130 and the oil outlet 112 . In addition, brake oil is also contained in the first oil pipe 125 and the second oil pipe 135 .

The electromagnetic coil 140 is fixed in the oil pressure control mechanism 110 , and the electromagnetic coil 140 is adjacent to the main oil passage 113 .

The metal valve body 150 is movably disposed in the main oil passage 113 and the electromagnetic coil 140 , and the metal valve body 150 has a hollow oil passage 151 and a connecting port 152 . The connecting port 152 communicates with the hollow oil passage 151 , and the connecting port 152 is selectively communicated with the oil inlet 111 (this part will be described later). The hollow oil passage 151 communicates with the oil outlet 112 , and the hollow oil passage 151 communicates with the oil inlet 111 through the connecting port 152 . In particular, there is a gap G between the metal valve body 150 and the inner wall of the main oil passage 113 .

The first elastic element 145 is connected between the metal valve body 150 and a wall 115 of the oil pressure control mechanism 110 . In this embodiment, the first elastic element 145 may be a spring.

The electronic control unit (ECU) 160 is electrically connected to the electromagnetic coil 140 and can be used to control the electrification operation of the electromagnetic coil 140 .

The wheel speed sensor 165 is electrically connected to the electronic control unit 160 , and can be used to sense the speed of the wheel, and send the sensed speed information to the electronic control unit 160 .

The motor 170 is connected to the hydraulic control mechanism 110 , and the motor 170 has an output shaft 171 .

The resisting rotating shaft 180 is connected to the output rotating shaft 171 in an eccentric manner (that is, the central axis of the resisting rotating shaft 180 is spaced and parallel to the central axis of the output rotating shaft 171 ), and the resisting rotating shaft 180 is located between the oil pressure control mechanism 110 middle. Therefore, when the motor 170 operates to drive the output shaft 171 to rotate, the resisting shaft 180 eccentrically connected to the output shaft 171 will rotate in a manner similar to that of a cam.

The plunger 185 is disposed in the auxiliary oil passage 114 of the oil pressure control mechanism 110 in a movable manner, and the plunger 185 abuts against the resisting shaft 180 .

The first one-way cup 190 is sleeved on the plunger 185 , and the first one-way cup 190 abuts against the inner wall of the auxiliary oil passage 114 .

The fixing column 192 is fixed in the oil pressure control mechanism 110 , and the fixing column 192 extends in the auxiliary oil passage 114 .

The second one-way cup 194 is sheathed on the fixing column 192 , and the second one-way cup 194 abuts against the inner wall of the auxiliary oil passage 114 . It should be noted that the sheathing direction of the second one-way leather cup 194 is the same as that of the first one-way leather cup 190 . That is to say, the brake fluid can only flow through the second one-way cup 194 and the first one-way cup 190 in one direction (rightward).

The second elastic element 196 is connected between the plunger 185 and the fixing post 192 . In this embodiment, the second elastic element 196 may also be a spring.

When the brake master cylinder 120 operates to generate brake oil pressure, the brake oil (brake oil pressure) will sequentially pass through the first oil pipe 125, the oil inlet 111, the main oil passage 113, the connecting port 152, the hollow oil passage 151, the main oil The oil flows through the passage 113 and the oil outlet 112 to (transmits to) the brake caliper 130 to force the brake caliper 130 to clamp the rotating brake disc, thereby achieving a braking effect on the wheel.

On the other hand, no matter whether the brake master cylinder 120 is running or not, the motor 170 will keep running to continuously drive the resisting shaft 180 to rotate in a manner similar to that of a cam. Here, as shown in FIG. 2 , FIG. 3 and FIG. 4 , the plunger 185 abutting against the thrust shaft 180 will reciprocate in the auxiliary oil passage 114 . In more detail, when the plunger 185 is pushed to the right by the resisting shaft 180, as shown in FIG. The second elastic element 196 between the plunger 185 and the fixing post 192 is compressed. At this time, the brake fluid located between the plunger 185 and the fixed column 192 will be pushed into the main oil passage 113 near the oil inlet 111 through the second one-way cup 194 . Conversely, as shown in FIG. 3 , when the plunger 185 and the first one-way cup 190 are moved to the left by the restoring elastic force provided by the second elastic member 196, the oil in the main oil passage 113 near the oil outlet 112 will The brake oil flows into the auxiliary oil passage 114 between the plunger 185 and the fixed column 192 through the first one-way cup 190 . As mentioned above, when the motor 170 is running continuously, the brake oil will form a flow circuit between the main oil passage 113 and the auxiliary oil passage 114 .

On the other hand, when emergency braking occurs, or when the electronic control unit 160 judges that the rotation speed of the wheels decreases too much through the wheel speed sensor 165 (that is, when the electronic control unit 160 judges that the brake disc is about to be pressed by the brake caliper 130 When locked), the electronic control unit 160 will immediately output a signal to drive the electromagnetic coil 140 to conduct electrification. At this time, as shown in FIG. 5 , a (rightward) magnetic field is generated in the inner area surrounded by the electromagnetic coil 140 to immediately attract the metal valve body 150 (rightward) into the inner area of the electromagnetic coil 140 . Here, the connection port 152 of the metal valve body 150 will be staggered from the oil inlet 111 or the main oil passage 113, so that the high-pressure brake oil (brake oil pressure) can no longer pass through the connection port 152, the hollow oil passage 151, the main oil passage in sequence. The oil passage 113 and the oil outlet 112 flow to (pass to) the brake caliper 130 , and only a small part of the brake oil will pass through the metal valve body 150 and the main oil passage 113 from the main oil passage 113 near the oil inlet 111 The gap G between the inner walls flows into the main oil passage 113 near the oil outlet 112 . At the same time, since the brake oil in the main oil passage 113 near the oil outlet 112 will continue to flow into the main oil passage 113 near the oil inlet 111, the brake fluid in the main oil passage 113 near the oil inlet 111 and near the oil outlet 112 The brake oil at the two locations will instantly generate a pressure difference (that is, the brake oil pressure in the main oil passage 113 near the oil outlet 112 will be lower than the brake oil pressure in the main oil passage 113 near the oil outlet 112), so it will The brake caliper 130 temporarily releases the brake disc. Then, the electronic control unit 160 will output a signal to stop the energization operation of the electromagnetic coil 140, and the metal valve body 150 will move (to the left) to its original position by the restoring elastic force provided by the first elastic element 145, In order to make the connection port 152 communicate with the oil inlet 111 or the main oil passage 113 again. At this time, the brake oil pressure difference in the main oil passage 113 will be eliminated, and the brake caliper 130 will clamp the brake disc. As mentioned above, the brake caliper 130 can effectively achieve the braking effect of preventing wheel deadlock by repeatedly causing the brake caliper 130 to perform the above-mentioned releasing and clamping operation of the brake disc.

To sum up, the anti-lock braking system disclosed in the present invention has the characteristics of simplified structure, thereby reducing its manufacturing cost.

Claims (3)

1. An anti-lock braking system, characterized in that it comprises: An oil pressure control mechanism has an oil inlet, an oil outlet, a main oil passage and an auxiliary oil passage, wherein the main oil passage connects the oil inlet and the oil outlet, and the auxiliary oil passage communicates with the the main oil passage, and connects the oil inlet and the oil outlet, and the oil inlet, the oil outlet, the main oil passage and the auxiliary oil passage contain brake oil; a brake master cylinder connected to the oil inlet; a brake caliper connected to the oil outlet; An electromagnetic coil is fixed in the oil pressure control mechanism and adjacent to the main oil passage; A metal valve body is set in the main oil passage and the electromagnetic coil in a movable manner, and has a hollow oil passage and a connection port, wherein the connection port communicates with the hollow oil passage and selectively communicates with the The oil inlet, the hollow oil passage communicates with the oil outlet, and communicates with the oil inlet through the connecting port, and there is a gap between the metal valve body and the inner wall of the main oil passage; a first elastic element, connected between the metal valve body and a wall of the oil pressure control mechanism, for providing resilience to the metal valve body; an electronic control unit electrically connected to the electromagnetic coil; a motor connected to the hydraulic control mechanism and having an output shaft; a thrust rotating shaft, connected to the output rotating shaft in an eccentric manner, and located in the oil pressure control mechanism; A plunger is arranged in the auxiliary oil passage in a movable manner, and abuts against the thrust rotating shaft; A first one-way cup, sleeved on the plunger, and abutting against the inner wall of the auxiliary oil passage; a fixing column, fixed in the oil pressure control mechanism, and extending in the auxiliary oil passage; A second one-way leather cup is sheathed on the fixing column and abuts against the inner wall of the auxiliary oil passage, wherein the sheathing direction of the second one-way leather cup is the same as that of the first one-way leather cup set in the same direction; and A second elastic element is connected between the plunger and the fixing column, and is used for providing restoring elastic force to the plunger. 2. The anti-lock braking system according to claim 1, further comprising a wheel speed sensor electrically connected to the electronic control unit. 3. The anti-lock braking system according to claim 1, further comprising a first oil pipe and a second oil pipe, wherein the first oil pipe is connected between the brake master cylinder and the oil inlet, The second oil pipe is connected between the brake caliper and the oil outlet, and the first oil pipe and the second oil pipe contain the brake oil.

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