CN111038464A

CN111038464A - Brake system

Info

Publication number: CN111038464A
Application number: CN201811195167.2A
Authority: CN
Inventors: 吴宗勋; 李文枢; 张国辉; 王致凯
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2018-10-15
Filing date: 2018-10-15
Publication date: 2020-04-21

Abstract

The invention provides a brake system which comprises a base, a driving motor, a cam, a brake pump, a rotating pipe and a bearing. The base is provided with an accommodating space. The driving motor is configured on the base and is positioned in the accommodating space. The cam is pivoted to the driving motor, and the driving motor is suitable for driving the cam to rotate relative to the base. The brake pump is arranged on the outer side of the base. The rotating pipe is rotatably arranged outside the base and is connected with the brake pump. The bearing is connected with the rotating pipe and extends into the accommodating space to be radially contacted with the cam.

Description

Brake system

Technical Field

The present invention relates to a braking system, and more particularly, to a braking system that can be manually controlled when in a self-driving mode.

Background

The existing vehicle brake system is roughly divided into two types, namely a manual control brake and an automatic control brake. The manual control brake mainly drives the brake structure to contact and rub the tire by treading the brake plate through the foot plate so as to achieve the purpose of speed reduction. The automatic control brake is mainly applied to self-driving, and a main control end of the self-driving judges the situations of obstacles and roads in the environment through various sensors, so as to control a motor to drive a brake structure to achieve the aim of automatic deceleration.

However, the conventional brake system for self-driving is only controlled by the master control end, and when the master control end generates a signal error, the brake structure is excessively rotated or reversely rotated, so that the link or other structures are damaged or deformed, or the brake structure is not operated, so that the traveling speed of the vehicle is not reduced as expected, thereby causing a traffic accident.

Disclosure of Invention

The invention provides a brake system, which can improve the conditions of structural damage and deformation caused by over-rotation and reverse rotation, and can be driven by external force when not automatically operated.

The brake system comprises a base, a driving motor, a cam, a brake pump, a rotating pipe and a bearing. The base is provided with an accommodating space. The driving motor is configured on the base and is positioned in the accommodating space. The cam is pivoted to the driving motor, and the driving motor is suitable for driving the cam to rotate relative to the base. The brake pump is arranged on the outer side of the base. The rotating pipe is rotatably arranged outside the base and is connected with the brake pump. The bearing is connected with the rotating pipe and extends into the accommodating space so as to be aligned and contacted with the cam.

Based on the above, the brake system of the invention is suitable for self-driving, and the main control end of the self-driving controls the driving motor to rotate, and applies force to the brake pump through the cam, the bearing and the rotating pipe, so as to achieve the purpose of decelerating the self-driving. Because the cam is adopted in the invention, when the driving motor rotates excessively or reversely, the condition that the bearing or other components are damaged and deformed can be avoided through the buffering effect of the cam. In addition, the bearing of the invention only contacts the bearing in contraposition, and the bearing are still mutually separated components, when the driving motor does not operate, a user can still drive the rotating pipe through external force alone to apply force to the brake pump, and the aim of self-driving deceleration can also be achieved.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1A is a schematic perspective view of a braking system according to an embodiment of the invention.

FIG. 1B is an exploded perspective view of a portion of the braking system of FIG. 1A.

FIG. 2A is a schematic side view of some of the components of the braking system of FIG. 1A.

FIG. 2B is a schematic diagram of an automatic mode braking state of the braking system of FIG. 2A.

FIG. 2C is a schematic view of a manual mode braking state of the braking system of FIG. 2A.

FIG. 3A is a schematic view of a damping state of the braking system of FIG. 2A.

FIG. 3B is a schematic diagram of a reverse state of the braking system of FIG. 2A.

[ notation ] to show

100: brake system

110: base seat

111: first mounting plate

112: second mounting plate

113: base plate

120: driving motor

121: rotating shaft

122: locating ring

130: cam wheel

140: brake pump

141: press cylinder

142: pressure lever

150: rotating pipe

151: first connecting rod

152: second connecting rod

153: third connecting rod

160: bearing assembly

161: positioning plate

162: rotating part

170: fixed seat

180: transmission rod

200: rotating shaft

AC1, AC 2: axial center

A1, a2, A3: included angle

AS: containing space

CW: clockwise direction

D: distance between each other

D1: first direction of rotation

D2: second direction of rotation

E1: first end

E2: second end

F: external force

L1: first length

L2: second length

L3: third length

And OS: peripheral surface

OW: outer wall surface

S1: plane of displacement

S2: butting surface

S3: buffer surface

TS: the top surface

W: thickness of

Detailed Description

Fig. 1A is a schematic perspective view of a braking system according to an embodiment of the invention. FIG. 1B is an exploded perspective view of a portion of the braking system of FIG. 1A.

Referring to fig. 1A and 1B, the braking system 100 of the present invention is suitable for self-driving, and the braking system 100 is controlled by a control core of the self-driving. The situation that obstacles and roads in the environment are judged by various sensors during self-driving can be simply explained, and sensing signals are transmitted to the control core, and the control core determines whether the speed of the vehicle is increased or decreased through logical operation. When the control core determines that deceleration is required, the braking system 100 is activated to achieve the goal of automatic deceleration.

The braking system 100 of the present embodiment includes a base 110, a driving motor 120, a cam 130, a brake pump 140, a rotating pipe 150, a bearing 160, and a fixing base 170.

The base 110 has a first mounting plate 111, a second mounting plate 112 and a bottom plate 113, which are arranged at intervals, and an accommodating space AS is formed between the first mounting plate 111 and the second mounting plate 112. Further, the first mounting plate 111 and the second mounting plate 112 both extend vertically upward and are parallel and opposite, wherein the height of the first mounting plate 111 relative to the bottom plate 113 is greater than the height of the second mounting plate 112 relative to the bottom plate 113, and the second mounting plate 112 has a top surface TS extending away from the first mounting plate 111.

The driving motor 120 is fixedly disposed on the first mounting plate 111 of the base 110 and located in the accommodating space AS. Further, the driving motor of the present embodiment is, for example, a synchronous motor, a reversible motor, a dc motor, an ac motor, a pulse motor or other motors with a pivot function, and the invention is not limited thereto.

The cam 130 is pivotally connected to the driving motor 120, and the driving motor 120 is adapted to drive the cam 130 to rotate relative to the base 110. Further, the cam 130 has a displacement surface S1, a top surface S2 and a buffering surface S3 adjacent to each other in sequence, and has a first length L1, a second length L2 and a third length L3 which are increased in sequence relative to the axial center AC1 of the driving motor 120.

The brake pump 140 is disposed outside the base 110. In detail, the brake pump 140 is fixedly disposed outside the second mounting plate 112 of the base 110. The rotary pipe 150 is rotatably disposed outside the base 110 and connected to the brake pump 140. Specifically, the rotating tube 150 is rotatably sleeved on the external rotating shaft 200, and the rotating shaft 200 is fixed in the self-driving vehicle, for example, so that the rotating tube 150 generates counterclockwise and clockwise axial rotation by using the rotating shaft 200 as the axis AC 2.

The bearing 160 is connected to the rotating pipe 150 and extends into the receiving space AS of the base 110 to radially contact the cam 130. Further, the bearing 160 has two positioning plates 161 spaced apart from each other and a rotating portion 162, and the rotating portion 162 is rotatably disposed between the two positioning plates 161. The distance D between the two positioning plates 161 is greater than the thickness W of the cam 130, so that the cam 130 can enter between the two positioning plates 161 to align and contact the rotating portion 162 of the bearing 160.

The fixing base 170 is disposed on the top surface TS of the second mounting plate 112. The driving motor 120 has a rotating shaft 121 and a positioning ring 122. The rotating shaft 121 extends toward the first mounting plate 111 and the fixing base 170, respectively. Wherein the first end E1 of the shaft 121 penetrates the first mounting plate 111, and the second end E2 of the shaft 121 is located above the second mounting plate 112. The positioning ring 122 is disposed on the outer peripheral surface OS of the rotating shaft 121 extending from the second end E2 toward the cam 130 and axially penetrates the fixing base 170. The cam 130 is secured to the retaining ring 122 and is positioned over the bearing 160.

In detail, the positioning ring 122 is axially inserted into the fixing seat 170, so that the rotation of the rotating shaft 121 and the positioning ring 122 can be prevented from shaking, and the stability of the cam 130 during rotation can be maintained.

In the present embodiment, the rotating tube 150 has a first connecting rod 151, a second connecting rod 152 and a third connecting rod 153.

The first link 151 is fixed on an outer wall OW of the rotating tube 150 and extends into the receiving space AS of the base 110, and the bearing 160 is connected to the first link 151 and correspondingly contacts the cam 130.

The second connecting rod 152 is fixed on the outer wall OW of the rotating tube 150 and is aligned with the brake pump 140. The brake pump 140 includes a cylinder 141 and a rod 142, and the rod 142 is telescopically disposed through the cylinder 141 and pivotally connected to the second link 152.

The third link 153 is fixed on an outer wall of the rotary pipe and is relatively far away from the brake pump 140. In the present embodiment, the braking system 100 has a transmission rod 180 pivotally connected to the third link 153. The transmission rod 180 is actually used to connect to a foot pedal (not shown) suitable for manual pedaling to provide an external force, so that the transmission rod 180 drives the rotation tube 150 to rotate through the third link 153.

FIG. 2A is a schematic side view of some of the components of the braking system of FIG. 1A. FIG. 2B is a schematic diagram of an automatic mode braking state of the braking system of FIG. 2A. FIG. 2C is a schematic view of a manual mode braking state of the braking system of FIG. 2A.

Referring to fig. 2A and 2B, the braking system 100 of the present embodiment is in the automatic mode, and the control core of the self-driving vehicle controls the driving motor 120 to operate and drive the rotating shaft 121 and the cam 130 to rotate along a first rotating direction D1. When the cam 130 rotates in the first rotation direction D1, the displacement surface S1 of the cam 130 pushes against the rotation portion 162 of the bearing 160, so as to drive the rotation tube 150 to rotate clockwise CW via the first link 151, and further apply a force to the pressing rod 142 of the brake pump 140 via the second link 152. When the abutting surface S2 of the cam 130 abuts against the rotating portion 162 of the bearing 160, the brake pump 140 has generated the maximum propelling force. At which time the cam 130 is rotated 145 degrees in the first rotational direction D1.

When the self-driving control core intends to release the deceleration state of the braking system 100, the shaft 121 and the cam 130 are driven to rotate in a second rotating direction D2 opposite to the first rotating direction D1. When the cam rotates in a second rotating direction D2 opposite to the first rotating direction D1, the abutting surface S2 of the cam 130 releases the abutting against the rotating portion 162 of the bearing 160 and contacts the rotating portion 162 by the displacement surface S1. Since the first length L1 of the displacement surface S1 is less than the second length L2 of the abutting surface S2, the brake pump 140 can be restored to the original position based on the external elastic member or the normally open setting of the brake pump itself. The brake pump 140 has thus released the propulsive force. In short, when the cam 130 is rotated by the driving motor 120, the cam 130 pushes against the bearing 160 and drives the rotating tube 150 to pivot through the first connecting rod 151.

Referring to fig. 2A and 2C, in the manual mode of the braking system 100 of the present embodiment, a user can drive the transmission rod 180 to move backward through the pedal, drive the rotation tube 150 to rotate clockwise CW along the axis AC2 through the third link 153, and apply a force to the pressing rod 142 of the brake pump 140 through the second link 152. While the bearing 160 is relatively distant from the displacement surface S1 of the cam 130 along with the first link 151 of the rotary pipe 150.

In short, when the rotary tube 150 is driven by the external force F of the transmission rod 180 to rotate in a clockwise direction CW, the second link 152 simultaneously rotates and pushes the pressing rod 142 to linearly move to retract into the cylinder 141, so that the brake pump 140 drives the brake shoe (not shown) to decelerate, and the first link 151 and the bearing 160 are relatively far away from the cam.

Further, when the external force F applied to the rotary pipe 150 is released, the cylinder 141 of the brake pump 140 can automatically push the pressing rod 142 back to the initial position based on the normal open setting thereof or the elastic recovery of the external torsion spring or elastic member connected to the transmission rod 180.

FIG. 3A is a schematic view of a damping state of the braking system of FIG. 2A. FIG. 3B is a schematic diagram of a reverse state of the braking system of FIG. 2A.

Referring to fig. 2B and fig. 3A, when the driving motor 120 drives the cam 130 to rotate along the first rotation direction D1 to the included angle a1(145 degrees), the maximum propelling force of the brake pump 140 is achieved. Further, when the braking system 100 rotates the cam 130 excessively due to signal error, wear of parts, or the like, the buffering surface S3 abuts against the rotating portion 162 of the bearing 160. Because the third length L3 of the buffering surface S3 is slightly greater than the second length L2 of the abutting surface S2, when the cam 130 rotates to the included angle a2(170 degrees) along the first rotation direction D1, the cam can still continuously push the bearing 160, so that the brake pump 140 can maintain the maximum propelling force.

Referring to fig. 3B, when the driving motor 120 is rotated reversely to the included angle A3(10 degrees) along the second rotation direction D2 in the initial state due to a signal error of the braking system 100, the cam 130 can be curved to avoid damage or deformation.

In summary, the brake system of the present invention is suitable for self-driving, and the main control end of the self-driving controls the driving motor to rotate, and applies force to the brake pump through the cam, the bearing and the rotating pipe, so as to achieve the purpose of decelerating the self-driving. Because the cam is adopted in the invention, when the driving motor rotates excessively or reversely, the condition that the bearing or other components are damaged and deformed can be avoided through the buffering effect of the cam. In addition, the bearing of the invention only contacts the bearing in contraposition, and the bearing are still mutually separated components, when the driving motor does not operate, a user can still drive the rotating pipe through external force alone to apply force to the brake pump, and the aim of self-driving deceleration can also be achieved.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A braking system, comprising:

a base having an accommodating space;

the driving motor is arranged on the base and is positioned in the accommodating space;

the cam is pivoted to the driving motor, and the driving motor is suitable for driving the cam to rotate relative to the base;

a brake pump disposed outside the base;

the rotating pipe is rotatably arranged outside the base and is connected with the brake pump; and

the bearing is connected with the rotating pipe and rotates along with the rotating pipe, and the bearing extends to be located in the accommodating space and is in radial contact with the cam.

2. The brake system according to claim 1, wherein the base has a first mounting plate and a second mounting plate spaced apart from each other, the receiving space is formed between the first mounting plate and the second mounting plate, the driving motor is fixedly disposed on the first mounting plate, and the brake pump is fixedly disposed outside the second mounting plate.

3. The brake system according to claim 2, further comprising a fixing seat disposed on the second mounting plate, wherein the driving motor has a rotating shaft and a positioning ring, the rotating shaft extends toward the first mounting plate and the fixing seat, respectively, wherein a first end of the rotating shaft penetrates through the first mounting plate, a second end of the rotating shaft is located above the second mounting plate, the positioning ring is disposed on an outer peripheral surface of the rotating shaft extending from the second end toward the cam and axially penetrates through the fixing seat, and the cam sleeve is fixed on the rotating shaft and located above the bearing.

4. The braking system of claim 1, wherein the cam has a displacement surface, a top surface and a cushioning surface that are adjacent to each other in sequence, and the displacement surface, the top surface and the cushioning surface have a first length, a second length and a third length that increase in sequence relative to an axis of the driving motor.

5. The braking system according to claim 1, wherein the bearing has two positioning plates arranged at intervals and a rotating portion rotatably disposed between the two positioning plates, wherein the two positioning plates have a spacing therebetween, the spacing is greater than a thickness of the cam, and the cam is adapted to be disposed between the two positioning plates and contact the rotating portion.

6. The braking system of claim 1, wherein the rotating tube has a first connecting rod, the first connecting rod is fixedly sleeved on the outer wall surface of the rotating tube and extends into the accommodating space, and the bearing is connected to the first connecting rod.

7. The braking system of claim 1, wherein the rotating tube has a second connecting rod sleeved on an outer wall of the rotating tube and aligned with the brake pump, and the brake pump includes a pressure cylinder and a pressure rod, and the pressure rod is telescopically disposed through the pressure cylinder and pivotally connected to the second connecting rod.

8. The braking system of claim 1, further comprising a transmission rod, wherein the rotary tube has a third link rod fixed on an outer wall surface of the rotary tube and relatively far away from the brake pump, and the transmission rod is pivotally connected to the third link rod.

9. The braking system of claim 1, wherein when the cam rotates in a first rotational direction, the cam pushes against the bearing to move the rotating tube and apply a force to the brake pump, and when the cam rotates in a second rotational direction opposite the first rotational direction, the cam releases the pushing against the bearing to return the brake pump to a home position.

10. The braking system of claim 1 wherein the bearing moves relatively away from the cam with the spool as the spool rotates and applies force to the brake pump.