CN216975611U

CN216975611U - Multi-disc brake device and vehicle

Info

Publication number: CN216975611U
Application number: CN202220330144.3U
Authority: CN
Inventors: 翟延鹏
Original assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Current assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-07-15
Anticipated expiration: 2032-02-18

Abstract

The application provides a multi-disc brake device and a vehicle. The multi-plate brake device includes: a brake piston driven to perform linear reciprocating motion to brake or release a friction plate to close or open the multi-plate brake device; and a distance sensor for sensing an amount of linear reciprocating motion of the brake piston. According to the multi-disc brake device, the linear reciprocating motion amount of the brake piston is sensed by additionally arranging the distance sensor, so that the braking or releasing state or the friction plate abrasion state of the multi-disc brake device can be rapidly and accurately identified, other operations can be synchronized or an early warning of insufficient braking torque can be provided, and the system reliability can be improved.

Description

Multi-disc brake device and vehicle

Technical Field

The application relates to the technical field of engineering vehicles and ships, in particular to a multi-disc brake device applied to engineering vehicles and ships.

Background

At present, multi-disc brake devices are increasingly used as parking brake devices in engineering vehicles and ships, based on their reliable braking performance and excellent cost effectiveness. Such parking brake devices can be hydraulically actuated to provide their braking or release force to achieve the driver's intention to park brake.

For such parking brake devices, monitoring the change and state of the hydraulic pressure thereof is generally employed to indirectly determine whether the parking brake device is in a braking state, a released state, or other state. However, hydraulic pressure has hysteresis problems in feedback and accuracy problems in the results. It is desirable to have a more accurate feedback scheme regarding the operating state of the parking brake.

SUMMERY OF THE UTILITY MODEL

Accordingly, the present invention provides an improved multi-plate brake device and vehicle that effectively solves or alleviates one or more of the above problems and other problems associated with the prior art.

To solve one of the above technical problems, according to an aspect of the present application, there is provided a multi-plate brake device including: the brake piston is driven to perform linear reciprocating motion to brake or release the friction plate so as to close or open the multi-plate brake device; and a distance sensor for sensing an amount of linear reciprocating motion of the brake piston.

In order to solve one of the above-mentioned technical problems, according to another aspect of the present application, there is provided a vehicle including: a multi-plate brake device as previously described; and a controller reporting a braking or releasing state or a friction plate wear state of the multi-plate brake device based on a parameter from the distance sensor.

According to the multi-plate braking device, the distance sensor is additionally arranged to sense the linear reciprocating motion amount of the braking piston, so that the braking or releasing state or the friction plate abrasion state of the multi-plate braking device can be rapidly and accurately identified, other operations can be synchronized or other judgments can be assisted, and the system reliability can be improved.

Drawings

The present application will be more fully understood from the detailed description given below with reference to the accompanying drawings, in which like reference numerals refer to like elements in the figures. Wherein:

FIG. 1 is a schematic cross-sectional view of one embodiment of a multi-plate brake device.

FIG. 2 is a perspective view of one embodiment of a multi-plate brake device.

Fig. 3 is a schematic view of an operating principle curve of a distance sensor of an embodiment of a multi-plate brake device.

Detailed Description

The present application will be described in detail below with reference to exemplary embodiments in the drawings. It should be understood, however, that the present application may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the application to those skilled in the art.

Furthermore, to any single feature described or implicit in an embodiment or shown or implicit in the drawings, the present application still allows any combination or permutation to continue between the features (or their equivalents) without any technical impediment, thereby achieving more other embodiments of the present application that may not be directly mentioned herein.

For ease of description of the embodiments mentioned herein, axial, radial, and circumferential are incorporated herein as reference coordinate systems. This directional description is intended to express the structural features of each component part itself and the relative positional relationship between the component parts, and is not intended to restrict the absolute positional relationship thereof restrictively. Taking the flange in fig. 1 as an example, the axial direction means that the axis of the flange indicates the direction, i.e., it is generally presented as the direction from left to right in the drawing; radial means the direction of indication that the flange extends outwardly from the center, or the direction of radial extension of the body portion (when it is circular); and circumferential means the direction of the indication around the outer edge of the flange.

Referring to fig. 1-2, respective perspective structural schematics of an embodiment of a multi-plate brake device are shown; and figure 3 reveals its working principle from the perspective of the distance sensor. Such a multi-plate brake device will be described below in conjunction with these drawings.

Referring to fig. 1, there is shown a portion of a multiple-disc brake apparatus 100 relating to components of the present concept, and other mature components of the multiple-disc brake apparatus are simplified for the sake of brevity. Generally, such a multi-plate brake device includes a caliper driven to apply force, a brake piston 111 transmitting torque, and a friction plate 112 directly performing a braking or releasing action. Among them, the distance sensor 120 may be disposed at a first side of the brake piston 111, and the friction plate 112 may be disposed at a second side of the brake piston 111 and driven by the brake piston 111 to brake or release the multi-plate brake device.

On this basis, the multi-plate brake device 100 further includes a distance sensor 120 disposed adjacent to the brake piston 111 and sensing an amount of linear reciprocating motion of the brake piston 111. Under the arrangement scheme, the judgment basis for rapidly and accurately identifying the braking or releasing state or the friction plate abrasion state of the multi-plate braking device is provided through the sensed linear reciprocating motion amount of the braking piston, so that other operations can be synchronized or other judgments can be assisted, and the reliability of the system is improved.

The configuration of the respective components and their connection in the multi-plate brake device will be described further below. In addition, for further improvement of reliability, practicability, economy or other aspects, additional parts may be added, as also exemplified below.

For example, although not shown in the drawings, such a multi-plate brake device 100 may further include an actuating member for applying a driving force to the brake piston 111 (e.g., a hydraulic force that provides an axial force to the brake piston 111) so that the brake piston 111 can release or brake the multi-plate brake device. Accordingly, such a multi-plate brake device 100 may further include an elastic restoring member 130, the elastic restoring member 130 applying an elastic force to the brake piston 111 in a direction opposite to the driving force; the multi-disc brake device can be braked or released when the brake piston 111 is subjected to only elastic force. Referring to the embodiment of fig. 1, in which the friction plate 112 is axially rightmost with respect to the coordinates in the drawing, a spring, which is present as an elastic return member 130, exerts an elastic force to the right. As can be seen, in this example, when there is no other external force including the driving force, the elastic force applied by the elastic restoring member 130 is transmitted to the friction plate 112 via the brake piston 111, and is finally used to brake the multi-plate brake device. Accordingly, the driving force applied by the driving member should be in a direction from right to left in the axial direction in the drawing so as to disengage the friction plate 112 from the multi-plate brake device against the elastic force when a command is received, thereby releasing the multi-plate brake device and stopping the braking action.

As another example, an example is also given in fig. 1 to 2 as an installation scheme of the distance sensor. The illustrated multi-plate brake device further comprises a flange 140 having an axial end face 141 arranged on the side of the brake piston 111 facing away from the friction plate 112, on which axial end face 141a first mounting hole 141a is provided. At this time, the distance sensor 120 may be mounted on the flange plate 140 through the first mounting hole 141 a. In particular, the sensing scheme of the distance sensor 120 may employ conversion of distance parameters to electrical signals. For example, the distance sensor 120 may reflect the amount of linear reciprocating motion of the brake piston through a voltage change and/or a current change. As an example, when an inductive sensor is used as the distance sensor, it is not always in contact with the part to be measured, but is converted into a current or voltage signal output by the distance between it and the part to be measured through electromagnetic induction of the sensor.

As another example, when the distance sensor 120 is configured as a wired sensor with a transmission cable 121, it should also be provided with a wiring scheme within the relatively compact and sealed space. In this case, the flange can still be considered as a retrofit object. Referring to fig. 1 to 2, the modified flange plate 140 further includes a circumferential wall 142, and the circumferential wall 142 extends from the axial end face 141 toward a side away from the friction plate 112, and is provided with a second mounting hole 142 a. At this time, the transmission cable 121 of the distance sensor 120 may be extended out of the flange plate 140 from the second mounting hole 142a so as to be accessed to a bus system of an external device (e.g., a vehicle) to perform signal transmission.

An embodiment of a vehicle having a multi-disc brake device according to any of the foregoing embodiments or combinations thereof is also provided, so that the corresponding technical effects are also achieved, and further description is omitted here. Such vehicles are furthermore equipped with a controller for analytical application of the parameters from the distance sensor 120. Specifically, the controller may report a brake or release state or a friction plate wear state of the multi-plate brake device based on the parameter from the distance sensor 120.

According to the vehicle under the arrangement scheme, the braking or releasing state or the friction plate abrasion state of the multi-plate braking device can be rapidly and accurately identified through the sensed linear reciprocating motion amount of the braking piston, so that other operations can be synchronized or other judgments can be assisted, and the reliability of the system is improved.

For example, the braking or releasing state or the friction plate wear state of the multi-plate brake device may be associated with a brake motor of the vehicle having an operating state that is synchronized with the braking or releasing state or the friction plate wear state of the multi-plate brake device reported by the controller.

On this basis, the controller may also be configured to report the wear status of the friction plates based on the parameters from the distance sensor 120, i.e. by monitoring the thickness of the friction plates to provide a warning about excessive wear of the friction plates, avoiding insufficient braking force delivered by the same to cause a brake reliability problem.

Specifically, referring to fig. 3, a small slope line is shown to show the linear relationship between the distance sensor 120 and the voltage/current signal, and a larger slope line shows the operating states of the multi-plate brake device reflected by the installed and calibrated distance sensor. For example, the line α represents that the distance sensor 120 is in the reference state. The process of line α moving to the left to line a represents the brake release process, and line a represents that the distance sensor 120 is in the left movement end position, at which time a status report should be sent indicating that the brake is released; the process of line α moving to the right to line b represents the braking process of the braking device, and line b represents that the distance sensor 120 is in the right movement end position, at which time a status report should be sent indicating that the braking device is braked; the process of moving line b to line c indicates the thickness wear of the friction plate during use, and line c indicates that the distance sensor 120 is at or near the position where the friction plate is excessively worn, and at this time, an early warning should be given to prompt replacement of the friction plate.

The above detailed description is merely illustrative of the present application and is not intended to be limiting. In the present application, relative terms such as left, right, up, and down are used to describe relative positional relationships, and are not intended to limit absolute positions. Various changes and modifications can be made by one skilled in the art without departing from the scope of the present application, and all equivalent technical solutions also fall into the scope of the present application, and the protection scope of the present application should be defined by the claims.

Claims

1. A multi-plate brake device, comprising:

a brake piston (111) driven to perform linear reciprocating motion to brake or release a friction plate (112) to close or open the multi-plate brake device; and

a distance sensor (120) for sensing an amount of linear reciprocating motion of the brake piston (111).

2. The multi-plate brake of claim 1, further comprising: a drive member that applies a driving force to the brake piston (111) so that the brake piston (111) releases or brakes the friction plate (112).

3. The multi-plate brake of claim 2, further comprising: an elastic restoring member (130) that applies an elastic force to the brake piston (111); wherein the elastic force is opposite to the driving force direction, and the brake piston (111) brakes or releases the braking device when only receiving the elastic force.

4. The multi-plate brake of claim 1, further comprising: the flange plate (140) comprises an axial end face (141), the axial end face (141) is arranged on one side, facing away from the friction plate (112), of the brake piston (111), and a first mounting hole (141 a) is formed in the axial end face; wherein the distance sensor (120) is mounted on the flange plate (140) through the first mounting hole (141 a).

5. The multi-plate brake arrangement of claim 4, wherein the flange (140) further comprises: a circumferential wall surface (142) which extends from the axial end surface (141) toward a side away from the friction plate (112) and on which a second mounting hole (142 a) is provided; wherein the distance sensor (120) is configured as a sensor with a transmission cable (121), and the transmission cable (121) extends out of the flange plate (140) from the second mounting hole (142 a).

6. Multi-disc brake device according to one of claims 1 to 5, characterized in that the distance sensor (120) reflects the amount of linear reciprocating movement of the brake piston (111) by a change in voltage and/or a change in current.

7. Multi-plate brake device according to one of claims 1 to 5, characterized in that the distance sensor (120) is arranged on a first side of the brake piston (111) and the friction plate (112) is arranged on a second side of the brake piston (111).

8. A vehicle, characterized by comprising: a multi-plate brake device according to any one of claims 1 to 7; and a controller reporting a braking or releasing state or a friction plate wear state of the multi-plate brake device based on a parameter from the distance sensor (120).

9. The vehicle of claim 8, characterized in that the controller is further configured to report a friction plate wear status based on a parameter from the distance sensor (120).

10. The vehicle of claim 8, further comprising an electric or hydraulic motor having an operating state that is synchronized with a brake or release state or a friction plate wear state of the multi-plate brake device reported by the controller.