CN107237844B

CN107237844B - Brake and servo system

Info

Publication number: CN107237844B
Application number: CN201710629464.2A
Authority: CN
Inventors: 杨�一; 陈世国; 彭玉礼; 肖胜宇; 钟成堡
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2017-07-27
Filing date: 2017-07-27
Publication date: 2023-04-28
Anticipated expiration: 2037-07-27
Also published as: CN107237844A

Abstract

The invention provides a brake and a servo system. The brake comprises a first brake plate, a second brake plate and a friction plate. The first braking plate is fixedly connected with the piece to be braked, the second braking plate is movably arranged relative to the first braking plate, and the friction plate is arranged between the first braking plate and the second braking plate. The first braking plate is provided with a braking convex column, the second braking plate is provided with a braking sliding groove matched with the braking convex column, and the width of the braking convex column between the first braking plate and the second braking plate is smaller than the width of the friction plate between the first braking plate and the second braking plate. According to the technical scheme, under the conditions of damage or unexpected failure of the friction plate and the like, the brake convex column and the brake chute are matched for rigid braking, so that the braking of the brake can be ensured, the reliability and the service life of the brake are improved, and the problem that the friction plate of the brake is directly braked to fail after being damaged in the prior art is effectively solved.

Description

Brake and servo system

Technical Field

The invention relates to the technical field of braking, in particular to a brake and a servo system.

Background

The electromagnetic brake is an important basic part of braking function, integrates mechanical, electric and electronic technologies, and is mainly used for precisely controlling and braking a rotating mechanism. The traditional braking structure is a single friction plate, and when braking, the friction plate generates friction force with the armature and the baffle plate by the positive pressure of the armature so as to brake.

When the electromagnetic brake is used, the friction plate is often easy to crack, and once the friction plate cracks, the whole brake can be invalid, so that the servo mechanism is in danger.

Disclosure of Invention

The invention mainly aims to provide a brake and a servo system, which are used for solving the problem that a friction plate of the brake is damaged and then is directly braked and disabled in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a brake including a first brake plate, a second brake plate, and a friction plate, the first brake plate being fixedly connected with a member to be braked; the second brake plate is movably arranged relative to the first brake plate; the friction plate is arranged between the first braking plate and the second braking plate; the first braking plate or the second braking plate is provided with a braking convex column, the second braking plate or the first braking plate is provided with a braking sliding groove matched with the braking convex column, and the width of the braking convex column between the first braking plate and the second braking plate is smaller than the width of the friction plate between the first braking plate and the second braking plate.

Further, the braking convex columns are a plurality of, and a plurality of braking convex columns are evenly distributed on the first braking plate or the second braking plate, correspondingly, the braking sliding grooves are also a plurality of, and a plurality of braking sliding grooves are evenly distributed on the second braking plate or the first braking plate.

Further, the plurality of braking convex columns are distributed on the first braking plate or the second braking plate in an annular mode, and correspondingly, the plurality of braking sliding grooves are distributed on the second braking plate or the first braking plate in an annular mode.

Further, the first brake plate and/or the second brake plate are/is a circular plate.

Further, the braking chute is an arc chute.

Further, the brake stud is a cylindrical stud.

Further, the first brake plate or the second brake plate is provided with a mounting groove, and the friction plate is mounted on the mounting groove.

Further, the friction plate is circular, and the mounting groove is an annular groove.

Further, the brake further comprises a driving member for driving the second brake plate to approach or separate from the first brake plate.

Further, the brake further comprises a stator, and the driving piece comprises a framework, an excitation winding and a spring, wherein the framework is arranged on the stator; the excitation winding is arranged on the framework; the spring is arranged on the stator and is connected with a second brake plate, which is made of ferromagnetic material.

Further, the spring is a torsion spring.

Further, a positioning convex column is formed on the stator, and a slot matched with the positioning convex column is formed on the second brake plate.

Further, the brake further comprises an end cover, the end cover is connected with the stator, an installation cavity is formed between the stator and the end cover, and the first brake plate, the second brake plate, the friction plate and the driving piece are all located in the installation cavity.

Further, the stator and the end cover are of an integral structure.

In order to achieve the above object, according to one aspect of the present invention, there is provided a servo system including a brake as described above.

By applying the technical scheme of the invention, as the width of the brake convex column between the first brake plate and the second brake plate is smaller than the width of the friction plate between the first brake plate and the second brake plate, as shown in the figure, during normal braking, the second brake plate moves relative to the first brake plate, both the second brake plate and the first brake plate are contacted with the friction plate, and the first brake plate fixedly connected with a piece to be braked is braked by friction of the friction plate to stop rotating. When the friction plate is damaged, as shown in the figure, if the second brake plate continues to move relative to the first brake plate, the brake convex column on the second brake plate is inserted into the brake sliding groove on the second brake plate, and the first brake plate fixedly connected with the piece to be braked is stopped by rigid braking. Therefore, by adopting the technical scheme of the invention, under the conditions of damage or unexpected failure of the friction plate and the like, the rigid braking can be carried out by adopting the matching of the braking convex column and the braking chute, the braking of the brake can still be ensured, the reliability and the service life of the brake are improved, and the problem that the friction plate of the brake is directly braked and fails after being damaged in the prior art is effectively solved.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which 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. In the drawings:

fig. 1 shows a schematic view of a structure of an embodiment of a brake according to the present invention when a friction plate brake is applied;

FIG. 2 shows a schematic structural view of the embodiment of the brake of FIG. 1 during a rigid braking event;

FIG. 3 shows a schematic structural view of a first brake plate of the brake of FIG. 1;

FIG. 4 shows a schematic structural view of a second brake plate of the brake of FIG. 1;

fig. 5 shows a schematic structural view of a second brake plate of the brake of fig. 1 mounted on a stator.

Wherein the above figures include the following reference numerals:

10. a first brake plate; 11. a brake post; 20. a second brake plate; 21. a braking chute; 22. a mounting groove; 23. a slot; 30. a friction plate; 40. a driving member; 41. a skeleton; 42. exciting the winding; 43. a spring; 50. a stator; 51. positioning the convex column; 60. an end cap.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other environments. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Fig. 1 and 2 show a first embodiment of the brake of the present invention, which comprises a first brake plate 10, a second brake plate 20 and a friction plate 30. The first brake plate 10 is fixedly connected with a member to be braked, the second brake plate 20 is movably arranged relative to the first brake plate 10, and the friction plate 30 is arranged between the first brake plate 10 and the second brake plate 20. The first brake plate 10 is provided with a brake boss 11, the second brake plate 20 is provided with a brake chute 21 matched with the brake boss 11, and the width of the brake boss 11 between the first brake plate 10 and the second brake plate 20 is smaller than the width of the friction plate 30 between the first brake plate 10 and the second brake plate 20.

According to the technical scheme of the first embodiment, since the width of the brake boss 11 between the first brake plate 10 and the second brake plate 20 is smaller than the width of the friction plate 30 between the first brake plate 10 and the second brake plate 20, as shown in fig. 1, during normal braking, the second brake plate 20 moves relative to the first brake plate 10, both the second brake plate 20 and the first brake plate 10 are in contact with the friction plate 30, and the first brake plate 10 fixedly connected with a member to be braked is stopped from rotating by friction braking of the friction plate 30. When the friction plate 30 is damaged, as shown in fig. 2, if the second brake plate 20 continues to move relative to the first brake plate 10, the brake stud 11 on the second brake plate 20 is inserted into the brake chute 21 on the second brake plate 20, and the first brake plate 10 fixedly connected with the member to be braked is caused to stop rotating by rigid braking. Therefore, by adopting the technical scheme of the invention, under the conditions of damage or unexpected failure of the friction plate 30 and the like, the brake convex column 11 and the brake chute 21 are matched for rigid braking, the braking of the brake can be still ensured, the reliability and the service life of the brake are improved, and the problem that the friction plate of the brake is directly braked and failed after being damaged in the prior art is effectively solved.

Alternatively, the first brake plate 10 is coupled to the external rotating shaft by means of a key or set screw fit.

Preferably, the surfaces of the first brake plate 10 and the second brake plate 20 that cooperate with the friction plate 30 are textured to increase the braking force with the friction plate 30. Alternatively, it is also possible to increase the braking force by the surface dotting treatment of the first brake plate 10 and the second brake plate 20 that are engaged with the friction plate 30.

As shown in fig. 3 and 4, in the first embodiment, the number of brake studs 11 is plural, the plurality of brake studs 11 are uniformly distributed on the first brake plate 10, and correspondingly, the number of brake runners 21 is plural, and the plurality of brake runners 21 are uniformly distributed on the second brake plate 20. By matching the plurality of brake lugs 11 with the plurality of brake runners 21, the stress distribution in the braking process can be more uniform, and damage to the brake lugs 11 caused by excessive stress concentration can be avoided. Since the brake is used for rotary braking, as a preferred embodiment, the plurality of brake studs 11 are distributed annularly on the first brake plate 10, and correspondingly, the plurality of brake runners 21 are also distributed annularly on the second brake plate 20. The braking can be realized in a targeted manner by the engagement of the annularly distributed braking lugs 11 with the annularly distributed braking runners 21. As an alternative embodiment, the number of the braking lugs 11 is 8, and correspondingly the number of the braking sliding grooves 21 is 8. As other alternative embodiments, the brake stud 11 and the brake runner 21 may also be more or less than 8.

As a preferred embodiment, as shown in fig. 3 and 4, the first brake plate 10 and/or the second brake plate 20 are circular plates.

As shown in fig. 4, in the technical solution of the first embodiment, the braking chute 21 is an arc chute, and when the arc chute is in use, the arc chute is convenient for inserting the braking boss 11 and is also convenient for friction with the braking boss 11. As shown in fig. 3, as an alternative embodiment, the brake stud 11 is a cylindrical stud. As a further alternative, the brake stud 11 may also be a hemispherical stud.

As shown in fig. 1 and 4, as an alternative embodiment, the first brake plate 10 is provided with a mounting groove 22, and the friction plate 30 is mounted on the mounting groove 22. The friction plate 30 is mounted through the mounting groove 22, so that the friction plate 30 can be more firmly fixed, and noise generated by the friction between the friction plate 30 and the second brake plate 20 due to eccentricity in the assembly process is avoided. As an alternative embodiment, the second brake plate 20 may be provided with a mounting groove 22, and it is also possible to mount the friction plate 30 to the second brake plate 20. In the above two embodiments, the width of the friction plate 30 between the first brake plate 10 and the second brake plate 20 refers to the thickness of the friction plate 30 protruding with respect to the surface of the first brake plate 10 or the second brake plate 20. Preferably, the friction plate 30 is adhesively secured within the mounting groove 22 by an anaerobic adhesive. Alternatively, it is also possible to secure the friction plate 30 in the mounting groove 22 by means of a connecting piece.

In the first embodiment, as shown in fig. 1 and 2, the friction plate 30 is in a circular shape, and as shown in fig. 4, the mounting groove 22 is an annular groove.

In the solution of the first embodiment, the brake further includes a driving member 40, and the second brake plate 20 can be driven to approach or separate from the first brake plate 10 by the driving member 40, so as to achieve braking more conveniently. As an alternative embodiment, as shown in fig. 1 and 2, the brake further includes a stator 50, and the driving member 40 includes a bobbin 41, an excitation winding 42, and a spring 43, the bobbin 41 being mounted on the stator 50, the excitation winding 42 being disposed on the bobbin 41. The spring 43 is provided on the stator 50 and connected to the second brake plate 20, and the second brake plate 20 is made of a ferromagnetic material. In use, the excitation winding 42 is energized first to attract the second brake plate 20. When braking is required, the exciting winding 42 is de-energized, and the second brake plate 20 moves close to the first brake plate 10 under the action of the spring 43 to brake. As a preferred embodiment, the spring 43 is a torsion spring. In the embodiment of the present invention, the torsion spring can reduce the impact of the second brake plate 20 relative to the first brake plate 10 during the rigid braking, so that the rigid braking is more stable.

Alternatively, in the first embodiment, the number of torsion springs is 6, and the torsion springs are uniformly distributed on the stator 50.

As shown in fig. 5, in the first embodiment, a positioning boss 51 is formed on the stator 50, and a slot 23 matching with the positioning boss is formed on the second brake plate 20. By the engagement of the positioning boss 51 with the slot 23, the second brake plate 20 can be more firmly mounted. When in use, the insulated and protected exciting winding 42 is placed in the notch of the stator 50, and the exciting winding 42 is wound by the framework 41 under the conditions of tooling and technology. The exciting winding 42 is in interference fit with the stator 50, the exciting winding 42 and the framework 41 thereof are fixed in the stator groove by interference force, and then the second brake plate 20 is put in, and the second brake plate 20 is matched with the positioning convex column 51 on the stator 50 by opening the slot 23. Alternatively, it is also possible that the frame 41 and the stator 50 are treated by epoxy potting.

In the solution of the first embodiment, as shown in fig. 1 and 2, the brake further includes an end cover 60, where the end cover 60 is connected to the stator 50, and a mounting cavity is formed between the stator 50 and the end cover 60. The first brake plate 10, the second brake plate 20, the friction plate 30 and the driving member 40 are all positioned in the mounting cavity to form a relatively independent brake assembly for ease of use. Preferably, the stator 50 and the end cap 60 are of unitary construction. Therefore, an integrated blank can be cast through a die, and then a machining process is performed, so that the machining cost is greatly reduced. On the other hand, the combined area of the stator 50 and the end cover 60 of the structure is increased, the heat dissipation is good, and the temperature rise is low.

In the embodiment not shown in the drawings, the brake of the present invention further includes the second embodiment, and the technical solution for implementing the second embodiment is different from the technical solution of the first embodiment only in that the second brake plate 20 is provided with a brake boss 11, and the first brake plate 10 is provided with a brake chute 21 matched with the brake boss 11. By adopting the technical scheme of the second embodiment, the brake can be rigidly braked by adopting the matching of the brake convex column 11 and the brake chute 21 under the conditions of damage or unexpected failure of the friction plate 30, and the like, so that the brake of the brake can be ensured, the reliability and the service life of the brake are improved, and the problem that the friction plate of the brake is directly braked and fails after being damaged in the prior art is effectively solved.

In the solution of the second embodiment, the plurality of brake studs 11 are uniformly distributed on the second brake plate 20, and correspondingly, the plurality of brake runners 21 are uniformly distributed on the first brake plate 10. Preferably, the plurality of braking studs 11 are distributed annularly on the second braking plate 20, and correspondingly, the plurality of braking runners 21 are also distributed annularly on the first braking plate 10.

In the technical scheme of the invention, the stator 50, the first brake plate 10 and the second brake plate 20 are made of soft magnetic material electrical pure iron. Other materials with good magnetic conductivity, such as soft magnetic material punched sheets, silicon steel sheets or No. 10 steel, are feasible, and are within the protection scope of the invention.

The invention also provides a servo system which comprises the brake. The servo system adopting the brake can adopt the brake convex column 11 and the brake chute 21 to carry out rigid braking under the conditions of damage or unexpected failure of the friction plate 30, and the like, and can still ensure the braking of the brake, improve the reliability and service life of the servo system.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A brake, comprising:

the first brake plate (10) is fixedly connected with the piece to be braked;

a second brake plate (20) movably arranged with respect to the first brake plate (10);

a friction plate (30) provided between the first brake plate (10) and the second brake plate (20);

the first braking plate (10) or the second braking plate (20) is provided with a braking convex column (11), the second braking plate (20) or the first braking plate (10) is provided with a braking sliding chute (21) matched with the braking convex column (11), and the width of the braking convex column (11) between the first braking plate (10) and the second braking plate (20) is smaller than the width of the friction plate (30) between the first braking plate (10) and the second braking plate (20);

the first braking plate (10) or the second braking plate (20) is provided with a mounting groove (22), and the friction plate (30) is mounted on the mounting groove (22); the friction plate (30) is in a circular ring shape, and the mounting groove (22) is an annular groove; the surfaces of the first brake plate (10) and the second brake plate (20) matched with the friction plate (30) are textured;

the brake further comprises a stator (50) and an end cover (60), wherein the stator (50) and the end cover (60) are of an integral structure.

2. Brake according to claim 1, wherein the number of brake studs (11) is a plurality, the number of brake studs (11) being evenly distributed over the first brake plate (10) or the second brake plate (20), and correspondingly the number of brake runners (21) being a plurality, the number of brake runners (21) being evenly distributed over the second brake plate (20) or the first brake plate (10).

3. Brake according to claim 2, wherein a plurality of said braking studs (11) are annularly distributed on said first braking plate (10) or said second braking plate (20), and correspondingly a plurality of said braking runners (21) are annularly distributed on said second braking plate (20) or said first braking plate (10).

4. Brake according to claim 1, characterized in that the first brake plate (10) and/or the second brake plate (20) are circular plates.

5. A brake according to any one of claims 1 to 4, characterized in that the brake chute (21) is an arcuate chute.

6. Brake according to any one of claims 1 to 4, characterized in that the brake stud (11) is a cylindrical stud.

7. Brake according to claim 1, characterized in that the brake further comprises a driving member (40), the driving member (40) being adapted to drive the second brake plate (20) closer to or farther away from the first brake plate (10).

8. Brake according to claim 7, characterized in that the driving member (40) comprises:

a frame (41) mounted on the stator (50);

an excitation winding (42) provided on the bobbin (41);

and a spring (43) arranged on the stator (50) and connected with the second braking plate (20), wherein the second braking plate (20) is made of ferromagnetic material.

9. Brake according to claim 8, characterized in that the spring (43) is a torsion spring.

10. Brake according to claim 8, characterized in that the stator (50) is formed with a positioning stud (51) and the second braking plate (20) is provided with a slot (23) cooperating with the positioning stud.

11. The brake of claim 8, wherein a mounting cavity is formed between the stator (50) and the end cap (60), the first brake plate (10), the second brake plate (20), the friction plate (30), and the driver (40) being located within the mounting cavity.

12. A servo system comprising a brake, characterized in that the brake is a brake as claimed in any one of claims 1 to 11.