CN218000210U

CN218000210U - Hydraulic multi-disc brake and mechanical equipment comprising same

Info

Publication number: CN218000210U
Application number: CN202221948603.0U
Authority: CN
Inventors: 翟延鹏
Original assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Current assignee: Bosch Rexroth Beijing Hydraulic Co Ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-12-09
Anticipated expiration: 2032-07-27

Abstract

The utility model discloses a hydraulic pressure multiple-disc brake, include: a brake housing and a brake pad, a brake piston, a spring defining portion, a spring, a brake washer, and a retainer ring sequentially installed in the brake housing in an axial direction when the hydraulic multi-disc brake is assembled, the spring defining portion being provided with a receiving portion for receiving the spring and being disposed between the brake piston and the brake washer; the brake washer is disposed proximate the spring defining portion and is configured such that the spring is held in the receiving portion pre-compressed between the brake piston and the brake washer; the retaining ring is configured to engage the brake housing and abut the brake washer to ensure compressive retention of the spring, wherein the brake washer and the brake piston further include additional securing structure configured to ensure relative securement of the brake piston and the brake washer and compressive retention of the spring after the retaining ring is released. The utility model discloses a dismantle the safety of hydraulic pressure multiple disc brake.

Description

Hydraulic multi-disc brake and mechanical equipment comprising same

Technical Field

The present invention relates to a hydraulic multi-disc brake, and also to a mechanical device comprising such a hydraulic multi-disc brake.

Background

Hydraulic multi-plate brakes, in particular for mechanical devices, are known from the prior art. Further, as known to those skilled in the art, existing hydraulic multi-plate brakes, particularly for mechanical equipment, are subject to maintenance throughout the life cycle. In the event of a failure of a hydraulic multi-plate brake, the entire hydraulic multi-plate brake is typically replaced to enable continued use of the machine. It is noted that in the context of the present application, mechanical device means various devices capable of performing engineering operations, including but not limited to mobile devices for moving objects, robotic devices, medical devices, food machines, household devices, and various other devices that require the use of brakes to effect timely braking of an output device (e.g., a motor) of the device.

Fig. 1 shows a hydraulic multi-disc brake of a type commonly found in the field of mechanical devices. As understood by those of ordinary skill in the art and as shown in fig. 1, the hydraulic multiplate brake includes at least a brake housing 1', a brake piston 2', a spring 3', a brake plate 4', a brake fluid bore 5', seals 6.1' and 6.2', a brake fluid reservoir 7', a brake washer 8', a retaining ring 9', a spring defining portion 10'. The spring defining portion is provided with a plurality of receiving portions for accommodating the springs 3'. The brake washer 8 'is configured to cover the receptacle on the opposite side to the brake piston so that the spring 3' can be held in the receptacle precompressed. Finally, the compression action of the brake washer 8 'on the spring 3' is fixed by means of a retaining ring 9 'engaged (e.g. snapped) to the brake housing 1'.

The significant drawbacks of the above prior art hydraulic multi-disc brakes are: when the brake fails, the brake is typically replaced in its entirety along with the brake housing, which significantly increases maintenance costs. Further, in the case where a person skilled in the art desires to perform maintenance or repair on the internal components of the hydraulic multi-disc brake, it is necessary to first release the retaining ring, but since the spring is compressed and disposed in the receiving portion, when the retaining ring is released, the spring may momentarily eject the brake washer and the spring itself out of the brake housing due to the compression force thereof, which may cause secondary damage to these components, or may cause injury (e.g., ejection to the face or the like) to the serviceman itself, which is completely undesirable.

SUMMERY OF THE UTILITY MODEL

In order to overcome above-mentioned problem or defect, the utility model discloses a hydraulic pressure multiple-disc brake, include: a brake housing and a brake pad, a brake piston, a spring defining portion, a spring, a brake washer, and a retainer ring sequentially installed in the brake housing in an axial direction when the hydraulic multi-disc brake is assembled, the spring defining portion being provided with a receiving portion for receiving the spring and being disposed between the brake piston and the brake washer; the brake washer is disposed proximate the spring defining portion and configured to cover the receiving portion such that the spring is retained in the receiving portion pre-compressed between the brake piston and the brake washer; and the retaining ring is configured to engage or snap with the brake housing and abut the brake washer to ensure compressive retention of the spring, characterized in that the brake washer and the brake piston further comprise additional securing structure configured to ensure relative securing of the brake piston and the brake washer and compressive retention of the spring after release of the retaining ring.

Further, the additional securing structure is one or more through holes provided in the brake washer and one or more threaded holes provided in the brake piston at locations corresponding to the one or more through holes such that at least one of the one or more through holes is aligned in the axial direction with at least one of the one or more threaded holes of the brake piston.

Further, the brake washer includes an integrally constructed central portion provided with one or more through-holes such that at least one of the one or more through-holes provided in the central portion is aligned in an axial direction with at least one of the one or more threaded holes of the brake piston.

Further, the brake washer is provided with one or more through holes at a position covering the receiving portion accommodating the spring and the brake piston is provided with one or more screw holes at a position corresponding to the receiving portion such that at least one of the one or more through holes is aligned with at least one of the one or more screw holes in the axial direction.

Further, when disassembling the hydraulic multi-plate brake, a disassembly bolt is threaded into the aligned at least one screw hole of the brake piston through the at least one through hole.

Further, the dismounting bolt has a bolt head with a diameter larger than the one or more through holes.

It is further obtained that the bolt head is provided with a fitting part cooperating with a specific dismounting device.

Further, after the dismounting bolt has been threaded into the at least one screw hole through the at least one through hole, the retaining ring is released from abutment against the brake washer, but the brake piston, the spring defining portion, and the brake washer remain relatively fixed.

Further, the additional fixing structure is an electromagnetic element capable of generating an electromagnetic force against a compression force of the spring, which is provided to the brake washer and the brake piston at a position corresponding to the brake washer, respectively.

The present disclosure is also directed to a mechanical apparatus including a motor configured to provide output power; and the hydraulic multi-plate brake is the hydraulic multi-plate brake, and is mechanically connected with the motor to brake the motor.

With the help of the utility model discloses, when this stopper breaks down, under the circumstances that the expectation was maintained or was maintained the internals of this hydraulic pressure multiple disc brake, can remove the retaining ring safely, and the spring can not pop out the stopper casing in the twinkling of an eye yet to avoid the secondary damage to these parts, and avoid causing the injury to maintainer itself. This maintenance also contributes to a considerable reduction in the maintenance costs for the brake: either at the cost of disassembly or replacement (reducing the need to replace the brake as a whole, and enabling extended use of the brake by only component repair).

Drawings

Other significant features and advantages of the invention result from the following non-limiting description provided for illustrative purposes with reference to the following drawings, in which:

figure 1 shows a schematic cross-sectional view of a prior art hydraulic multi-disc brake;

FIG. 2 shows a schematic cross-sectional view of a hydraulic multi-plate brake according to an embodiment of the present invention, wherein the dismounting bolts are not yet in the working position; and

fig. 3 shows a schematic cross-sectional view of a hydraulic multi-disc brake according to an embodiment of the invention, in which the dismounting bolt has been in the working position.

Detailed Description

Fig. 1 shows a schematic cross-sectional view of a hydraulic multiplate brake according to the prior art, the detailed description of which has been described in the background of the present application and will not be described in additional detail here.

First, the following definitions are made for the position and orientation in the present invention: the axial direction a corresponds to the direction in which brake pads mounted in the brake are juxtaposed, the radial direction R is perpendicular to the axial direction a and corresponds to the diameter direction of the circular disc surface of the brake pad and the circumferential direction C corresponds to the peripheral direction of the circular disc surface of the brake pad. In the present invention, the brake pad is of a type known to those skilled in the art, in which the cross section of the brake pad perpendicular to the thickness direction is in the shape of a circular disc, and thus the surface of the brake pad perpendicular to the thickness direction is also referred to as a circular disc surface.

Fig. 2 shows a schematic cross-sectional view of a hydraulic multi-disc brake according to an embodiment of the invention, wherein the dismounting bolt is not yet in the working position. It is to be understood that the rest position corresponds to the position in which the dismounting bolt is not screwed to the hydraulic multi-disc brake.

According to the embodiment shown in fig. 2, the hydraulic multi-disc brake of the present invention comprises a brake housing 1, a brake piston 2, a spring 3, a brake disc 4, a brake washer 8, and a retaining ring 9. As shown in the drawings, in some cases, the hydraulic multi-disc brake of the present invention further includes a spring defining portion 10. As also shown in the drawings and as will be understood by those of ordinary skill in the art, the present invention contemplates a hydraulic multi-disc brake that may further include a brake fluid bore 5, seals 6.1 and 6.2 cooperating with the brake piston 2 to seal between the brake piston 2 and the brake housing 1, and a brake fluid reservoir 7.. The spring defining portion 10 is provided with a receiving portion (e.g., the spring defining portion 10 may be provided as a tubular member having a through hole) for accommodating the spring 3. When the hydraulic multiplate brake is assembled, a brake pad 4, a brake piston 2 (which has been mounted with seals 6.1 and 6.2, for example), a spring defining portion 10, a spring 3, a brake washer 8, and a retainer ring 9 are mounted in the brake housing 1 in this order from right to left in the axial direction. The seals 6.1 and 6.2 seal the gap between the brake piston 2 and the brake housing 1 to avoid brake fluid leaking from the gap. Brake pads 4 are juxtaposed in the brake housing 1 in the axial direction and are movable in the axial direction in cooperation with the brake piston 2 to switch between a braking configuration and a non-braking configuration; the brake piston 2 is arranged adjacent to the brake disc 4 along the axial direction and forms a brake fluid accommodating cavity 7 for accommodating brake fluid with the brake housing 1 at the side adjacent to the brake disc 4, wherein the contact surfaces of the brake piston 2 and the brake housing 1 in the radial direction are respectively sealed by sealing elements 6.1 and 6.2 to avoid the brake fluid from leaking through the contact surfaces; the spring defining portion 10 is provided with a receiving portion for accommodating the spring 3 and is provided between the brake piston 2 and the brake washer 8; the brake washer 8 is disposed immediately adjacent to the spring delimiting portion 10 and is configured to cover the receiving portion of the spring 3 in the spring delimiting portion 10 on the axial left side of the brake, so that when the brake is assembled, the spring 3 can be held in the receiving portion pre-compressed by means of both the brake piston 2 and the brake washer 8 in abutment therewith; and the retaining ring 9 is configured to engage or snap with the brake housing 1 and contact the brake washer 8 to ensure compression retention of the brake washer 8 and the brake piston 2 to the spring 3 by means of the retaining ring 9. In contrast to the prior art, in this embodiment, the brake washer 8 and the brake piston 2 further comprise additional fixing structures configured to ensure the relative fixing of the brake piston 2 with said brake washer 8 and the compressive retention of the spring 3 after the release of the retaining ring 9. As an example, the additional fixing structure is configured as follows: the brake washer 8 further comprises a central portion 8.1 configured integrally therewith, which central portion is provided with one or more through holes, and the brake piston 2 further comprises one or more threaded holes 2.1, at least one of the through holes provided in the central portion 8.1 being aligned in axial direction with at least one of the threaded holes 2.1 of the brake piston 2 when the brake is assembled, such that a dismounting bolt 22 can be screwed into the aligned threaded hole 2.1 of the brake piston 2 through the at least one through hole in the central portion 8.1, if required. Further, the dismounting bolt has a bolt head 22.1 with a diameter larger than the one or more through holes, which bolt head 22.1 is also provided with an engagement portion that can engage with a specific dismounting device, such as a dismounting clamp. Although the present invention is described with the additional fixing structure including the screw hole 2.1 and it is contemplated to use the detaching bolt 22 as the fixing member to be engaged with the screw hole 2.1, it will be understood by those skilled in the art that the screw hole 2.1 may be constructed in other forms without being limited to a screw hole as long as it can achieve a temporary fixing connection with the fixing member to achieve a relative fixation of the brake washer 8 and the brake piston 2.

Fig. 3 shows a schematic cross-sectional view of a hydraulic multi-disc brake according to an embodiment of the invention, with the dismounting bolt in the working position. It is to be understood that the working position corresponds to the position when the bolt is detached for screwing to the hydraulic multi-disc brake.

A significant advantage of the dismounting bolt 22 in dismounting the hydraulic multi-disc brake of the present embodiment will be described with reference to fig. 3. Unlike the prior art, the hydraulic multi-plate brake of the present embodiment can be easily disassembled for repair or maintenance when the brake malfunctions or requires routine maintenance of the brake, without always having to replace the hydraulic multi-plate brake as a whole, thereby reducing costs, and ensures safe disassembly without causing danger to maintenance or repair personnel by the disassembly bolts 22.

In particular, when the brake fails or requires maintenance, the dismounting bolt 22 can first be screwed into the aligned threaded hole 2.1 of the brake piston 2 through the at least one through hole in the central portion 8.1. Then, the retaining action of the retaining ring 9 on the brake washer 8 of the hydraulic multi-disc brake is released, and since the bolt head 22.1 of the dismounting bolt 22 is larger in diameter than the one or more through holes and its other end is screwed into the aligned threaded hole 2.1 of the brake piston 2 so that the brake washer 8, the spring defining part 10 and the brake piston 2 remain relatively fixed, the dismounting bolt 22 can still ensure that the spring 3 is compressively disposed in the receiving part when the retaining ring 9 is released, so that the spring 3 can still be compressively retained in the receiving part without abruptly ejecting the brake washer 8 or the spring 3 when the retaining ring 9 is released, thereby avoiding causing a danger. Further, by means of the fitting portion provided in the bolt head portion 22.1, a service or maintenance person can integrally take out the brake washer 8, the spring defining portion 10 and the brake piston 2 by means of a specific detaching device, so that the brake pad 4 which requires the most maintenance or is most liable to malfunction can be effectively exposed, and thus the service of the brake can be realized. Further, although an additional fixing structure is described to integrally take out the brake washer 8, the spring defining portion 10 and the brake piston 2, it will be understood by those skilled in the art that the additional fixing structure may integrally take out a brake shaft snap-coupled with the brake piston 2 in addition to the brake washer 8, the spring defining portion 10 and the brake piston 2 in some cases. Further, it is also conceivable to take out other brake elements that are engaged with the brake washer 8, the spring defining part 10 and the brake piston 2 but are not listed here together. No matter how the components are taken out integrally, the protection scope of the utility model is included.

Further, although the present invention is not described in detail, as will be appreciated by those of ordinary skill in the art, after the retaining ring 9 is engaged to the brake housing 1, the overall packaging of the hydraulic multi-disc brake may be achieved using a seal cap that mates with the retaining ring 9 (e.g., a seal cap inscribed radially inward of the retaining ring 9). These matters also fall within the scope of the present invention.

Further, although in the additional fixing structure disclosed in the present invention, the brake washer 8 includes the central portion 8.1 constructed integrally therewith and the central portion is provided with one or more through holes, it will be readily apparent to those skilled in the art that the brake washer 8 does not include the central portion 8.1 where the dimensions allow, and, in contrast, the one or more through holes are provided at a position of the brake washer 8 covering the receiving portion of the spring 3 accommodated in the spring defining portion 10 and the one or more screw holes 2.1 are provided at a position of the brake piston 2 corresponding to the receiving portion of the spring 3 accommodated in the spring defining portion 10, so that the detaching bolt 22 can be fixedly connected into the aligned screw hole 2.1 of the brake piston 2 through the at least one through hole of the brake washer 8, thereby achieving the additional fixing structure and the above-described function thereof. The design of such additional securing structures is also encompassed within the scope of the present invention.

Further, although specific positions and orientations of the components are defined in the embodiments of the present disclosure, those of ordinary skill in the art will appreciate that these positions and orientations are merely exemplary and that any suitable changes can be made without departing from the scope of the present disclosure.

Further, although a specific structure of the hydraulic multi-plate brake including an additional fixing structure and a specific manner of using the removal bolt 22 are described, it will be easily contemplated by those skilled in the art that the additional fixing structure, the removal bolt 22 and the method of using the removal bolt 22 to ensure that the compression of the spring is maintained when the brake is removed are also applicable to other types of brakes, and are not limited to the types of brakes specifically described in the present application.

Further, although the present invention describes that the brake washer 8, the spring defining portion 10 and the brake piston 2 are integrally taken out by using the detaching bolt 22 in cooperation with an additional fixing structure, a person skilled in the art will easily conceive of other fixing structures to realize the relative fixing of the brake washer 8, the spring defining portion 10 and the brake piston 2, for example, the relative fixing of the three can be realized by using an electromagnetic structure, for example, when the hydraulic multi-disc brake needs to be detached, the relative fixing of the three positions can be realized by using an electromagnetic element disposed on the three instead of the additional fixing structure as described above (for example, an electromagnetic element capable of generating an electromagnetic force enough to overcome the compression force of the spring 3 can be disposed at a position corresponding to the brake washer 8 in the brake washer 8 and the brake piston 2, so that the relative fixing of the brake washer 8, the spring defining portion 10 and the brake piston 2 can be ensured by obtaining the electromagnetic force by energizing the electromagnetic element when the brake is detached). Any other solution that allows to temporarily fix the three when it is necessary to disassemble the brake can also be envisaged by the person skilled in the art without departing from the scope of the present application.

Further, while the present invention describes a specific structure of the hydraulic multi-disc brake including the spring defining portion 10, in some cases, the structure and configuration of the spring defining portion may be different from that of the present application. For example, the spring defining portion 10 may not be a separate member provided with a receiving portion, but may instead be a spring defining portion (e.g., a circular flange or the like) integrally constructed with the brake washer 8. Further, in some cases, the spring defining portion 10 may be omitted (for example, in a case where the non-axial movement space of the spring can be substantially defined by the fit between other components).

The present disclosure is also directed to a mechanical apparatus including a motor configured to provide output power; and a hydraulic multi-disc brake as described above, which is mechanically connected to the motor to brake the motor.

Although various specific embodiments and modifications of the present invention have been described above, those skilled in the art can make various substitutions or modifications without departing from the scope of the present invention, and such substitutions, modifications or equivalents also fall within the protection scope of the claims of the present application.

Claims

1. A hydraulic multi-plate brake comprising: a brake housing (1) and a brake pad (4), a brake piston (2), a spring defining portion (10), a spring (3), a brake washer (8) and a retainer ring (9) which are sequentially installed in the brake housing (1) in an axial direction when the hydraulic multi-disc brake is assembled, the spring defining portion (10) being provided with a receiving portion for receiving the spring (3) and being disposed between the brake piston (2) and the brake washer (8); the brake washer (8) being arranged in close proximity to the spring defining portion (10) and being configured to cover the receiving portion such that the spring (3) is held in the receiving portion pre-compressed between the brake piston (2) and the brake washer (8); and the retaining ring (9) is configured to engage or click with the brake housing (1) and to abut with the brake washer (8) to ensure the compressive retention of the spring (3), characterized in that the brake washer (8) and the brake piston (2) further comprise additional fixation structures configured to ensure the relative fixation of the brake piston (2) to the brake washer (8) and the compressive retention of the spring (3) after the release of the retaining ring (9).

2. The hydraulic multi-plate brake of claim 1, characterized in that the additional fixing structure is one or more through holes provided in the brake washer (8) and one or more threaded holes (2.1) provided in the brake piston (2) at a position corresponding to the one or more through holes, such that at least one of the one or more through holes is aligned in axial direction with at least one of the one or more threaded holes of the brake piston (2).

3. The hydraulic multi-plate brake of claim 2, characterized in that the brake washer (8) comprises an integrally constructed central portion (8.1) provided with the one or more through holes such that at least one of the one or more through holes provided in the central portion (8.1) is aligned in axial direction with at least one of the one or more threaded holes of the brake piston (2).

4. The hydraulic multi-plate brake of claim 2, characterized in that the brake washer (8) is provided with the one or more through holes at a position covering the receiving portion accommodating the spring (3) and the brake piston (2) is provided with the one or more threaded holes at a position corresponding to the receiving portion such that at least one of the one or more through holes is aligned in axial direction with at least one of the one or more threaded holes.

5. Hydraulic multi-plate brake according to any one of claims 2-4, characterized in that when disassembling the hydraulic multi-plate brake, a disassembly bolt (22) is screwed through the at least one through hole into the aligned at least one threaded hole of the brake piston (2).

6. Hydraulic multi-disc brake according to claim 5, characterized in that the dismounting bolt (22) has a bolt head (22.1) with a diameter larger than the one or more through holes.

7. Hydraulic multi-disc brake according to claim 5, characterized in that the bolt head (22.1) is provided with an engagement portion for engagement with a specific dismounting device.

8. A hydraulic multi-plate brake according to claim 5, characterized in that the retaining ring (9) is released from abutment against the brake washer (8) after the dismounting bolt (22) has been screwed through the at least one through hole into the at least one threaded hole, the brake piston (2), the spring defining part (10) and the brake washer (8) remaining relatively fixed.

9. The hydraulic multiplate brake of claim 1, characterized in that the additional fixing structures are electromagnetic elements capable of generating an electromagnetic force against the compression force of the spring (3) provided to the brake washer (8) and to the brake piston (2) at a position corresponding to the brake washer (8), respectively.

10. A mechanical apparatus, comprising a motor configured to provide an output power; and a hydraulic multiplate brake according to any one of claims 1 to 9, which is mechanically connected to the motor to brake the motor.