CN215097527U - Brake-by-wire device - Google Patents

Abstract

The utility model relates to a line control actuating device, which comprises a clamp frame, a clamp body and a transmission unit, wherein a yoke spring is arranged on the clamp frame, two friction plates which are oppositely arranged are arranged on the yoke spring, and an accommodating space for accommodating a brake disc is formed between the two friction plates; the clamp body is arranged on the clamp frame in a guiding and sliding manner, an accommodating cavity with an opening facing the friction plate is formed in the clamp body, and a driving part for outputting rotary power is arranged in the accommodating cavity. The transmission unit comprises an inner piston positioned in the accommodating cavity and sleeved outside the driving part, a speed reducing mechanism in transmission connection between the inner piston and the driving part, and an outer piston sleeved outside the inner piston and connected with the inner piston through a ball screw structure, wherein the outer piston is connected with a friction plate close to the caliper body. The speed reducing mechanism is driven by the driving part to drive the outer piston to move and make the two friction plates approach or separate from each other. The wire control brake device has simple and compact structure and less parts.

Description

Brake-by-wire device

Technical Field

The utility model relates to the technical field of vehicles, in particular to line control moves device.

Background

With the rapid development of the automobile industry, customers have higher and higher requirements on the safety performance of automobiles and also have higher requirements on the intelligent auxiliary functions of the automobiles. Hydraulic brake systems are widely used in automobiles due to their mature technology and good performance. However, the existing hydraulic brake system generally has the problems of large volume, complex structure, inconvenient arrangement, and easy energy loss and leakage.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a wire-controlled brake device, which has a compact structure and few components, and is convenient for controlling the wire-controlled brake device on a vehicle.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a wire control brake comprising:

the brake disc brake device comprises a clamp frame, a brake disc and a brake disc, wherein a yoke spring is arranged on the clamp frame, two friction plates which are oppositely arranged are arranged on the yoke spring, and an accommodating space for accommodating the brake disc is formed between the two friction plates;

the clamp body is arranged on the clamp frame in a guiding and sliding manner, an accommodating cavity with an opening facing the friction plate is formed in the clamp body, and a driving part for outputting rotary power is arranged in the accommodating cavity;

the transmission unit comprises an inner piston, a speed reducing mechanism and an outer piston, wherein the inner piston is positioned in the accommodating cavity and sleeved outside the driving part, the speed reducing mechanism is connected between the inner piston and the driving part in a transmission mode, the outer piston is sleeved outside the inner piston and connected with the inner piston through a ball screw structure, and the outer piston is connected with the friction plate close to the caliper body;

the speed reducing mechanism is driven by the driving part to drive the outer piston to extend out of or retract into the accommodating cavity from the opening, and the two friction plates are close to or far away from each other so as to clamp or loosen a brake disc between the two friction plates.

Furthermore, an end cover which shields the inner piston is arranged on the outer piston, and the outer piston is connected with the friction plate through the end cover.

Further, the speed reduction mechanism is a two-stage planetary gear speed reduction mechanism, and a gear ring of the two-stage planetary gear speed reduction mechanism is connected with the driving part and fixed in the accommodating cavity.

Further, the driving part is a motor arranged in the accommodating cavity.

Further, a controller is arranged on the clamp body to control the driving part.

Furthermore, the open end of the accommodating cavity is provided with a dust cover clamped between the outer piston and the clamp body.

Furthermore, one end of the inner piston, which is far away from the opening, is connected with a rotating support part sleeved outside the driving part, an elastic part which is blocked at the front side of the rotating support part along the extending direction of the outer piston is arranged in the accommodating cavity, and one end of the elastic part, which is close to the opening, is abutted against the clamp body; when the outer piston retracts due to the abutting between the dust cover and the outer piston, the dust cover has friction acting force applied to the outer piston and can drive the inner piston to drive the rotating support part to be close to and extrude the elastic part.

Furthermore, a stress part which is arranged at the front side of the elastic part in a blocking manner along the extending direction of the outer piston is arranged in the accommodating cavity, and the elastic part is propped against the clamp body through the stress part.

Furthermore, the elastic part is a wave spring sleeved outside the inner piston.

Furthermore, the rotation supporting part comprises a bearing retainer, a bearing seat arranged on the bearing retainer, and a needle bearing and a thrust ball bearing which are respectively arranged on two sides of the bearing seat, wherein the bearing seat is fixedly connected with the inner piston, and the thrust ball bearing is arranged close to the elastic part.

Compared with the prior art, the utility model discloses following advantage has:

the brake-by-wire device only comprises the clamp frame, the clamp body, the driving part and the transmission unit which are provided with the friction plates, has simple structure and fewer parts, and can make the brake-by-wire device compact in structure by arranging the inner piston sleeve outside the driving part and arranging the outer piston sleeve outside the inner piston, thereby being convenient for the arrangement of the brake-by-wire device on the vehicle and having better practicability.

In addition, the end cover which shields the inner piston is arranged on the outer piston, so that dust and the like can be prevented from entering the ball screw structure, and the transmission performance between the inner piston and the outer piston can be ensured. And the speed reducing mechanism adopts a two-stage planetary gear speed reducing mechanism, so that the speed reducing mechanism has higher speed reducing and torque increasing effects.

Secondly, by providing a dust cover between the outer piston and the caliper body, dust and the like can be prevented from entering the accommodating chamber. And set up and rotate the supporting part, can improve the rotation effect of inner piston, and can absorb the extrusion force of buffering inner piston to opening one side through setting up the elastic component.

In addition, the elastic part is abutted to the clamp body through the stress part, so that the elastic part can be prevented from being damaged when the rotation supporting part extrudes the elastic part. And the elastic part adopts a wave spring, so that the absorption effect on the extrusion force can be improved. The rotation effect of the inner piston can be improved by arranging the needle roller bearing and the thrust ball bearing in the rotation supporting part.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a brake-by-wire apparatus according to an embodiment of the present invention;

fig. 2 is an exploded view of the brake-by-wire apparatus according to the embodiment of the present invention;

fig. 3 is a cross-sectional view of a brake-by-wire apparatus according to an embodiment of the present invention;

fig. 4 is an exploded view of the motor, inner piston and outer piston according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an end cap according to an embodiment of the present invention;

fig. 6 is an assembly view of the motor and the two-stage planetary gear reduction mechanism according to the embodiment of the present invention;

fig. 7 is an exploded perspective view of a two-stage planetary reduction mechanism according to an embodiment of the present invention;

FIG. 8 is an enlarged view of portion A of FIG. 3;

fig. 9 is an exploded perspective view of the rotation support according to the embodiment of the present invention;

description of reference numerals:

1、ECU；

2. a clamp body;

3. a rotation support; 301. a gasket; 302. a needle bearing; 303. a bearing seat; 304. a thrust ball bearing; 305. a bearing retainer; 306. a wave spring; 307. a gasket;

4. a secondary planetary gear reduction mechanism; 401. a secondary planet carrier; 402. a secondary planet wheel; 403. a primary planet carrier; 404. a primary planet wheel; 405. a ring gear; 406. a driving gear;

5. a motor;

6. a piston assembly; 601. an end cap; 6011. a card slot; 602. an outer piston; 603. a clamp spring; 604 an inner piston; 605. a ball bearing;

7. a clamp frame; 8. a friction plate; 9. mounting a column; 10. a dust cover.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to a line control actuating device which comprises a clamp frame, a clamp body and a transmission unit in an integral structure. The clamp frame is provided with a yoke spring, the yoke spring is provided with two friction plates which are oppositely arranged, and an accommodating space for accommodating the brake disc is formed between the two friction plates. The clamp body is arranged on the clamp frame in a guiding and sliding manner, an accommodating cavity with an opening facing the friction plate is formed in the clamp body, and a driving part for outputting rotary power is arranged in the accommodating cavity.

The transmission unit comprises an inner piston positioned in the accommodating cavity and sleeved outside the driving part, a speed reducing mechanism in transmission connection between the inner piston and the driving part, and an outer piston sleeved outside the inner piston and connected with the inner piston through a ball screw structure, wherein the outer piston is connected with a friction plate close to the caliper body. The speed reducing mechanism is driven by the driving part to drive the outer piston to extend out of or retract into the containing cavity from the opening, and the two friction plates are close to or far away from each other so as to clamp or loosen the brake disc between the two friction plates.

The brake-by-wire device of the embodiment only comprises the clamp frame provided with the friction plates, the clamp body, the driving part and the transmission unit, has a simple structure and fewer parts, and can be compact in structure by arranging the inner piston sleeve outside the driving part and arranging the outer piston sleeve outside the inner piston, thereby being convenient for arrangement on a vehicle and having better practicability.

Based on the above design concept, an exemplary structure of the brake-by-wire apparatus of the present embodiment is shown in fig. 1 to 3, wherein the structure and arrangement of the caliper bracket 7, the yoke spring and the friction plate 8 of the present embodiment may refer to an existing brake, and details thereof are not repeated herein. In addition, as shown in fig. 1, the right end of the caliper body 2 of the present embodiment is formed with the aforementioned opening, and hereinafter, the "front end" specifically refers to an end close to the opening. In addition, the caliper body 2 of the present embodiment is slidably mounted on the caliper frame 7 via two oppositely disposed mounting posts 9 shown in fig. 2, and the specific arrangement thereof can refer to the prior art.

The driving portion of the present embodiment is specifically the motor 5 fixed in the accommodating cavity, and a driving gear 406 in transmission connection with the speed reducing mechanism is disposed on the power output shaft of the motor 5. As shown in fig. 3, to facilitate connection between the motor 5 and the ring gear 405 described below, an annular housing is configured at the end of the motor 5 where the output shaft is provided. In addition, a controller for controlling the motor 5 is provided on the caliper body 2 for the purpose of braking. In order to further improve the structural compactness of the brake-by-wire device, as shown in fig. 3, the controller of the present embodiment is specifically provided in the accommodating cavity, and specifically employs the ECU 1. Here, the controller may be another control unit connected to the ECU1, in addition to the ECU 1.

As can be seen from fig. 3 in conjunction with the exploded view of the motor 5, the inner piston 604, the outer piston 602, and the like shown in fig. 4, the outer piston 602 and the inner piston 604 together form a piston assembly 6, wherein, in order to prevent dust and the like from entering the piston assembly 6, an end cap 601 for shielding the inner piston 604 is disposed at one end (i.e., the right end shown in fig. 4) of the outer piston 602 near the opening, and the end cap 601 is connected with the outer piston 602 in an interference manner. Further, to prevent dust and the like from entering the housing chamber, as shown in fig. 3, a dust cover 10 is provided at the open end of the housing chamber, and is sandwiched between the outer piston 602 and the caliper body 2. And the dust cap 10 is preferably made of rubber to prevent the outer piston 602 from being damaged by the reciprocating movement of the outer piston 602.

Referring to fig. 3, the outer piston 602 of the present embodiment is connected to the friction plate 8 via the end cap 601, wherein the end cap 601 and the friction plate 8 may be connected in any manner capable of achieving connection therebetween. As a specific embodiment, as shown in fig. 5, a clamping groove 6011 is formed in the middle of the end cover 601, and corresponding to the clamping groove 6011, a clamping column is provided on the friction plate 8 connected to the outer piston 602 (i.e., the left friction plate 8 shown in fig. 3), and the clamping column can be clamped in the clamping groove 6011 to form a connection between the friction plate 8 and the outer piston 602. And the connection can limit the rotation of the outer piston 602, so that the outer piston 602 can be driven to move linearly when the inner piston 604 rotates, and the friction plate 8 can be pushed to clamp or release a brake disc.

As also shown in fig. 3 and 4, raceways are formed on the outer circumferential surface of the inner piston 604 and the inner surface of the outer piston 602, and balls 605 are provided in the raceways, and the embodiment can be implemented with reference to the structure of the conventional lead screw motor. In addition, as shown in fig. 6 and 7, the speed reduction mechanism of the present embodiment is embodied as a two-stage planetary gear speed reduction mechanism 4 to obtain a high speed reduction and torque increase effect. And as in the prior art, this two-stage planetary gear reduction mechanism 4 includes a ring gear 405 shown in fig. 8, a primary planet carrier 403 provided in the ring gear 405, a primary planet gear 404 provided on the primary planet carrier 403, and a secondary planet carrier 401 and a secondary planet gear 402.

As shown in fig. 6, the ring gear 405 is connected to the annular housing of the electric machine 5 by interference and is fixed in the housing chamber by this connection. It will be appreciated that the ring gear 405 may be screwed, welded, etc. in addition to interference with the annular housing. The second-stage planet carrier 401 of this embodiment is clamped on the inner piston 604, and a clamp spring 603 for preventing the second-stage planet carrier 401 from coming off is arranged at the end of the inner piston 604. With this arrangement, when the motor 5 is controlled by the ECU1 to start, power can be transmitted to the inner piston 604 via the driving gear 406, the primary planet gear 404, the primary planet carrier 403, the secondary planet gear 402, and the secondary planet carrier 401 in sequence, so as to drive the inner piston 604 to rotate, and further drive the outer piston 602 to move linearly.

At this time, in order to improve the rotating effect of the inner piston 604, as shown in fig. 8 in combination with fig. 3, a rotating support portion 3 sleeved outside the motor 5 is connected to one end of the inner piston 604 away from the opening. The rotation support portion 3 specifically includes a bearing holder 305 provided in the housing chamber, a bearing seat 303 provided on the bearing holder 305, and a needle bearing 302 and a thrust ball bearing 304 provided on both sides of the bearing seat 303, respectively.

As shown in fig. 9, the bearing holder 305 is a thin-walled structure, one end of which is open, and the other end of which is formed with a through hole for the one end of the bearing seat 303 to pass through. The bearing housing 303 has a small-diameter end that can pass through the thrust ball bearing 304 and the through hole, and a large-diameter end integrally connected to the small-diameter end, and has a fitting hole provided through the small-diameter end and the large-diameter end.

With continued reference to fig. 8, the bearing seat 303 is sleeved outside the housing of the motor 5 through a sleeve hole and is in interference fit with an end of the inner piston 604 away from the opening, and the thrust ball bearing 304 is sleeved on the small-diameter end of the bearing seat 303 and is constrained between the bearing seat 303 and the bearing holder 305. The needle bearing 302 is arranged in parallel with the bearing seat 303 and sleeved outside the shell of the motor 5, and a gasket 301 for blocking the left side of the needle bearing 302 is arranged at the open end of the bearing retainer 305. It should be noted that, in addition to the interference connection with the inner piston 604, the bearing seat 303 may also adopt other connection methods capable of realizing the connection therebetween.

As also shown in fig. 8, due to the above-mentioned abutment between the dust cap 10 and the outer piston 602, when the outer piston 602 retracts into the accommodating chamber, the dust cap 10 has a frictional force applied to the outer piston 602, which causes the inner piston 604 to move the rotation support 3 toward the open end of the accommodating chamber. At this time, in order to restrict the movement, an annular groove is formed in the inner wall of the caliper body 2, and the rotation support portion 3 is disposed in the annular groove, and the movement of the inner piston 604 is restricted by the blocking of the side wall of the front end of the annular groove.

At this time, the caliper body 2 is prevented from being damaged by the abutment of the rotation support portion 3 with the front end side wall of the annular groove. For this purpose, as shown in fig. 3 and fig. 8, an elastic portion is disposed in the annular groove and is blocked at the front side of the rotation supporting portion 3 along the extending direction of the outer piston 602, and the front end of the elastic portion abuts against the front end sidewall of the annular groove. In addition, in order to effectively buffer the impact of the rotation support portion 3 on the side wall of the front end of the annular groove, the elastic portion of the embodiment is specifically the wave spring 306, and the wave spring 306 is sleeved outside the inner piston 604.

Based on the above-mentioned structure of the rotation support portion 3, as shown in fig. 8, the wave spring 306 of the present embodiment is specifically sleeved outside the small diameter end of the bearing housing 303. In this embodiment, in order to prevent the wave spring 306 from being damaged due to the impact of the rotating support portion 3, as shown in fig. 3 and 8, a force receiving portion is disposed in the accommodating cavity and is blocked at the front side of the wave spring 306 along the extending direction of the outer piston 602, and the wave spring 306 is abutted against the front end side wall of the annular groove via the force receiving portion. The stressed portion of the present embodiment is specifically a washer 307 sleeved outside the bearing seat 303.

In the brake-by-wire device of the embodiment, the motor 5 can be controlled by the ECU1 to act, and further can push the left friction plate 8 to abut against the left side of the brake disc through the two-stage planetary gear speed reducing mechanism 4, the inner piston 604 and the outer piston 602 in sequence; and when the braking force is continuously applied, the caliper body 2 moves leftwards relative to the caliper frame 7, and at the moment, the caliper body 2 can drive the right friction plate 8 to be tightly abutted against the right side of the brake disc, so that the brake of the brake disc can be realized.

Therefore, the brake-by-wire device of the embodiment can facilitate braking of the brake disc by adopting the structure, and has the advantages of simple and compact structure and fewer parts, thereby facilitating arrangement of the brake-by-wire device on a vehicle.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A wire control actuator, comprising:

the brake caliper comprises a caliper frame (7), wherein a yoke spring is arranged on the caliper frame (7), two friction plates (8) which are oppositely arranged are arranged on the yoke spring, and an accommodating space for accommodating a brake disc is formed between the two friction plates (8);

the clamp body (2) is arranged on the clamp frame (7) in a guiding and sliding manner, an accommodating cavity with an opening facing the friction plate (8) is formed in the clamp body (2), and a driving part for outputting rotary power is arranged in the accommodating cavity;

the transmission unit comprises an inner piston (604) which is positioned in the accommodating cavity and sleeved outside the driving part, a speed reducing mechanism which is in transmission connection between the inner piston (604) and the driving part, and an outer piston (602) which is sleeved outside the inner piston (604) and connected with the inner piston (604) through a ball screw structure, wherein the outer piston (602) is connected with the friction plate (8) close to the caliper body (2);

the speed reducing mechanism is driven by the driving part to drive the outer piston (602) to extend out of or retract into the accommodating cavity from the opening, and the two friction plates (8) are close to or far away from each other so as to clamp or loosen a brake disc between the two friction plates (8).

2. The brake-by-wire apparatus according to claim 1, characterized in that: an end cover (601) which shields the inner piston (604) is arranged on the outer piston (602), and the outer piston (602) is connected with the friction plate (8) through the end cover (601).

3. The brake-by-wire apparatus according to claim 1, characterized in that: the speed reducing mechanism is a two-stage planetary gear speed reducing mechanism (4), and a gear ring (405) of the two-stage planetary gear speed reducing mechanism (4) is connected with the driving part and fixed in the accommodating cavity.

4. The brake-by-wire apparatus according to claim 1, characterized in that: the driving part is a motor (5) arranged in the accommodating cavity.

5. The brake-by-wire apparatus according to claim 1, characterized in that: and a controller for controlling the driving part on the clamp body (2).

6. The brake-by-wire apparatus according to any one of claims 1 to 5, characterized in that: the open end of the containing cavity is provided with a dust cover (10) clamped between the outer piston (602) and the clamp body (2).

7. The brake-by-wire apparatus according to claim 6, wherein: one end of the inner piston (604) far away from the opening is connected with a rotating supporting part (3) sleeved outside the driving part, an elastic part which is blocked at the front side of the rotating supporting part (3) along the extending direction of the outer piston (602) is arranged in the accommodating cavity, and one end of the elastic part close to the opening is abutted on the clamp body (2); when the outer piston (602) retracts due to the abutting between the dust cover (10) and the outer piston (602), the dust cover (10) has a friction acting force applied to the outer piston (602) and can drive the inner piston (604) to drive the rotating support part (3) to approach and press the elastic part.

8. The brake-by-wire apparatus according to claim 7, wherein: the containing cavity is internally provided with a stress part which is blocked at the front side of the elastic part along the extending direction of the outer piston (602), and the elastic part is propped against the pliers body (2) through the stress part.

9. The brake-by-wire apparatus according to claim 7, wherein: the elastic part is a wave spring (306) sleeved outside the inner piston (604).

10. The brake-by-wire apparatus according to claim 7, wherein: the rotation supporting part (3) comprises a bearing retainer (305), a bearing seat (303) arranged on the bearing retainer (305), and a needle roller bearing (302) and a thrust ball bearing (304) which are respectively arranged on two sides of the bearing seat (303), the bearing seat (303) is fixedly connected with the inner piston (604), and the thrust ball bearing (304) is arranged close to the elastic part.

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