Brake with compact structure

Abstract

The brake with the compact structure comprises a stator, an armature, a rotor and a cover plate which are sequentially arranged in the axial direction, a plurality of connecting holes are formed in the end face of the rotor in the circumferential direction, a mounting plate is further connected to the rotor, a plurality of transmission pins are arranged on the end face of the mounting plate, and the transmission pins are matched with the connecting holes in a one-to-one mode. The mounting plate is adapted for connection with a rotating mechanism. The rotating mechanism is attached to the mounting plate, and the mounting plate is connected with the rotor through the transmission pin, so that a spline structure is prevented from being arranged in the rotor, and the inner hole diameter of the brake is greatly increased. Compared with the prior art, the mounting plate is arranged on the rotor to provide connection with the rotating mechanism, the mounting plate is connected with the rotor through the transmission pin, a spline structure in the prior art is abandoned, and the rotor has the advantage of being capable of penetrating through a large-diameter shaft body.

Description

Technical Field

[0001] The present invention relates to the technical field of brake devices, in particular to a brake with a compact structure. Background Art

[0002] The brake is a device that has the function of slowing down, stopping or keeping the moving parts (or moving machinery) stopped. It is a mechanical part that stops or slows down the moving parts in the machinery. Among them, the electromagnetic power-off brake is a friction brake that is disengaged (released) when powered on and braked by spring when powered off.

[0003] The existing brake is mainly used for braking the motor output shaft, which generally includes a stator, an armature, a rotor and a cover plate, wherein the inner wall of the rotor is usually constructed as a spline structure, and is connected to the motor output shaft through the spline. This will result in the brake being used to pass through a small inner hole of the shaft body, and cannot pass through a shaft body with a large diameter. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a brake with a compact structure.

[0005] The objective of the present invention is achieved through the following technical solutions: A compact brake comprises a stator, an armature, a rotor and a cover plate arranged in sequence along the axial direction, a plurality of connecting holes are constructed circumferentially on the end face of the rotor, a mounting plate is also connected to the rotor, a plurality of transmission pins are arranged on the end face of the mounting plate, a plurality of the transmission pins are adapted to the plurality of connecting holes one by one, and the mounting plate is adapted to be connected to a rotating mechanism.

[0006] Preferably, the cover plate is embedded in the cover plate.

[0007] Preferably, a mounting hole is provided on the mounting plate, and the transmission pin is interference fit in the mounting hole.

[0008] Preferably, the rotor comprises a plurality of brake discs arranged in a stacked manner.

[0009] Preferably, a plurality of friction plates are axially slidably arranged between the armature and the cover plate, the plurality of brake discs and the plurality of friction plates are axially staggered, and the brake discs and the friction plates at least partially overlap in the radial direction, and the armature ejection can push the plurality of friction plates and the plurality of brake discs to move toward one side of the cover plate.

[0010] Preferably, a bushing is provided in the connecting hole of the brake disc, an annular groove is provided on the outer peripheral surface of the bushing, and the brake disc is clamped in the annular groove.

[0011] Preferably, the connection hole of the brake disc has a notch communicating with the inner wall of the brake disc.

[0012] Preferably, the friction plate includes a plate body and friction blocks provided on the side wall of the plate body.

[0013] Preferably, the friction plate includes a plurality of circumferentially distributed and relatively independent friction units, and each of the friction units is adapted to be able to slide axially.

[0014] Preferably, the brake disc includes a disc body, and a plurality of abutting pieces are slidably arranged on the outer peripheral surface of the disc body. An elastic member is connected between the abutting piece and the disc body. Under the action of centrifugal force, the elastic member deforms so that the abutting piece changes the overlapping area with the friction unit in the radial direction; an air flow channel is formed in the disc body, and air jet holes are formed on the outer peripheral surface of the brake disc beside each abutting piece, and the air jet holes communicate with the air flow channel; the abutting piece includes a piece body and a rod body that is hermetically and slidably fitted to the disc body, and the sliding hole of the rod body communicates with the air flow channel; an opening and closing plate is rotatably arranged in the air jet hole, the rotating shaft of the opening and closing plate extends into the sliding hole of the rod body, and a pulling rod is arranged on the rotating shaft of the opening and closing plate, and a plurality of shifting teeth are elastically arranged on the side wall of the rod body, and the plurality of shifting teeth are arranged in sequence along the axial direction.

[0015] The beneficial effects of the present invention are: 1. The rotating mechanism is attached to the mounting plate, and the mounting plate is connected to the rotor through a transmission pin, thus avoiding the setting of a spline structure inside the rotor, which greatly increases the inner diameter of the brake. Compared with the prior art, the present invention provides a connection with the rotating mechanism by arranging a mounting plate on the rotor, and the mounting plate is connected to the rotor through a transmission pin, abandoning the spline structure in the prior art, and having the advantage of being able to pass through a large-diameter shaft body.

[0016] 2. The friction plate and the brake disc in the prior art are separately arranged, which is beneficial to controlling the overall thickness of the rotor, making the structure of the brake more stable and compact and the volume more miniaturized. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the embodiment; Figure 2 It is a schematic structural diagram of the embodiment with the cover plate removed; Figure 3 It is an exploded structural diagram of the embodiment; Figure 4 It is a schematic cross-sectional structural diagram of the embodiment; Figure 5 It is a schematic structural diagram of the abutting piece; Figure 6 ForFigure 5 Enlarged view of part A; Figure 7 It is a schematic structural diagram of the lever.

[0018] Reference numerals: 1, stator; 2, armature; 3, rotor; 4, cover plate; 5, connection hole; 6, mounting plate; 7, drive pin; 8, mounting hole; 9, brake disc; 10, friction plate; 11, bushing; 12, annular groove; 13, notch; 14, plate body; 15, friction block; 16, friction unit; 17, disc body; 18, abutting piece; 19, elastic member; 20, air flow channel; 21, air jet hole; 22, sheet body; 23, rod body; 24, opening and closing plate; 25, pull rod; 26, pick teeth. Specific embodiments

[0019] Hereinafter, the technical solutions of the present invention will be described clearly and completely in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0020] As Figures 1 to 7 shown, a compact brake includes a stator 1, an armature 2, a rotor 3, and a cover plate 4 arranged axially in sequence. The specific assembly relationship among the four is prior art and will not be elaborated here. For example, an electromagnet and a spring are usually arranged inside the stator 1. The armature 2 is pushed by the spring to press the rotor 3 against the cover plate 4 to achieve braking; when the electromagnet is energized, it generates a magnetic force and adsorbs the armature 2 to compress the spring, thereby achieving the release of braking from the rotor 3.

[0021] Different from the prior art, on the end face of the rotor 3 disclosed herein, a plurality of connection holes 5 are configured circumferentially, and the mounting plate 6 is attached to the end face of the rotor 3 by inserting a drive pin 7 into the connection holes 5. For example, an interference fit is preferably adopted between the drive pin 7 and the mounting plate 6 to achieve fixation, and mounting holes 8 for inserting the drive pin 7 are correspondingly configured on the mounting plate 6.

[0022] Referring to Figure 2 , in this example, 6 connection holes 5 are configured on the end face of the rotor 3, and 6 drive pins 7 are also correspondingly arranged on the mounting plate 6. The 6 drive pins 7 are inserted into the 6 connection holes 5 one by one. When a rotating mechanism (not shown in the figure), such as the output shaft of a motor, is attached to the mounting plate 6, the rotation of the output shaft will drive the mounting plate 6 and the rotor 3 to rotate under the transmission of the drive pin 7; when the armature 2 brakes, the armature 2 presses against the rotor 3 to restrict its rotation, thereby achieving braking of the output shaft.

[0023] In some embodiments, the rotor 3 includes a plurality of stacked brake discs 9. For example, friction pads 10 may be provided on the side surfaces of the brake discs 9, and the braking effect is enhanced by the mutual abutment between the friction pads 10. As another solution, the friction pads 10 and the brake discs 9 may be separately provided, which is conducive to controlling the overall thickness of the rotor 3.

[0024] For example, a plurality of friction pads 10 are slidably provided axially between the armature 2 and the cover plate 4, and the plurality of friction pads 10 and the plurality of brake discs 9 are arranged staggered axially, and they also have at least partially overlapping portions in the radial direction. As the armature 2 is ejected, the plurality of friction pads 10 and the plurality of brake discs 9 will be pressed into a whole until they abut against the cover plate 4 and achieve the braking effect.

[0025] In a preferred example, a bushing 11 is provided in the connection hole 5 of the brake disc 9. For example, an annular groove 12 is formed on the outer peripheral surface of the bushing 11, and the brake disc 9 is snap-fitted into the annular groove 12. It can be understood that when the armature 2 ejects to brake, the axial sliding of the brake disc 9 will be guided by the sliding of the bushing 11 on the transmission pin 7. A lower friction coefficient can be adapted between the bushing 11 and the transmission pin 7, making the sliding of the brake disc 9 smoother and more reliable.

[0026] In addition, the connection hole 5 of the brake disc 9 is also adapted with a notch 13 communicating with the inner wall of the brake disc 9, and the bushing 11 can be more conveniently installed into the connection hole 5 through the notch 13, thus improving the assembly convenience of the brake.

[0027] The specific numbers of the friction pads 10 and the brake discs 9 can be adjusted according to the actual braking effect requirements, and are not limited in this disclosure. Att Figure 3 A preferred example shows 4 friction pads 10 and 3 brake discs 9. For example, the friction pad 10 may include a plate body 14 and friction blocks 15 provided on the side walls of the plate body 14, and the braking effect is improved by the abutment between the friction blocks 15 and the brake disc 9.

[0028] For example, the friction pad 10 may be annular in overall configuration, thus providing a larger contact area between the friction pad 10 and the brake disc 9. However, in fact, the braking effect, especially the speed performance of braking, has no direct relationship with the size of the contact area. When the friction coefficient is constant and the positive pressure given by the armature 2 is the same, the braking effect is basically the same.

[0029] Therefore, in this disclosure, the friction pad 10 preferably includes a plurality of relatively independent friction units 16 distributed circumferentially, and similarly each friction unit 16 is also adapted to be able to slide axially. After the armature 2 is ejected, the friction unit 16 in direct contact with it will abut against the brake disc 9, thereby pushing the plurality of friction pads 10 and the brake discs 9 to be pressed into a whole until they abut against the cover plate 4 and achieve the braking effect.

[0030] The friction plate 10 is designed to be composed of circumferentially distributed friction units 16, which not only ensures the consistency of the braking effect but also saves the consumables of the friction plate 10.

[0031] The radial dimension of the mounting plate 6 can be preferably adapted to be able to fit into the cover plate 4. Thus, when viewed axially, the mounting plate 6 and the cover plate 4 at least partially overlap, which makes the brake more compact and miniaturized.

[0032] As Figures 5 to 7 shown, in some embodiments, especially based on the scheme that the friction plate 10 is composed of a plurality of circumferentially distributed and relatively independent friction units 16, the brake disc 9 preferably includes a disc body 17, and a contact piece 18 is slidably arranged on the outer peripheral surface of the disc body 17. The contact piece 18 specifically includes a piece body 22 and a rod body 23 arranged on the piece body 22. The rod body 23 is hermetically slidably connected to the disc body 17, and an elastic member 19 such as a spring is also connected between the piece body 22 and the disc body 17.

[0033] It can be imagined that when the brake disc 9 rotates with the output shaft, according to the different rotational speeds of the output shaft, the contact piece 18 will be subjected to different degrees of centrifugal force, and the rod body 23 will slide to different degrees in its sliding hole. At this time, the area where the contact piece 18 radially coincides with the friction unit 16 will be adjusted, that is, when braking at different rotational speeds of the output shaft, the pressing area and pressing position of the contact piece 18 and the friction unit 16 are different, thereby reducing the single-point wear of the friction unit 16 and increasing the service life of the friction unit 16.

[0034] In addition, an annular air flow channel 20 is constructed in the disc body 17, and air injection holes 21 communicating with the air flow channel 20 are opened on the outer peripheral surface of the disc body 17 beside each contact piece 18. A closing plate 24 is rotatably arranged in the air injection hole 21, and the rotating shaft of the closing plate 24 is adapted to extend into the sliding hole of the rod body 23. And the sliding hole of the rod body 23 communicates with the air flow channel 20.

[0035] A pull rod 25 is also arranged on the rotating shaft of the closing plate 24, and a plurality of axially distributed and elastically movable teeth 26 are arranged on the side wall of the rod body 23. The following will elaborate on the schematic process of the disclosed brake from the start of the output shaft to braking: 1. The brake disc 9 is in the initial state, and under the action of the elastic member 19, the contact piece 18 is in the initial position on the side close to the disc body 17; 2. The output shaft starts to rotate, and under the action of centrifugal force, the contact piece 18 is thrown out to the corresponding radial position. During this period, the rod body 23 slides outward in its sliding hole, and the shifting tooth 26 pushes the lever 25, thereby driving the opening and closing plate 24 to rotate to open the air injection hole 21. The subsequent shifting tooth 26 cannot shift the lever 25, so it bounces and passes over the lever without causing interference.

[0036] 3. The armature 2 is pushed out to brake, and the contact piece 18 opposite to the friction unit 16 is pressed, and the other contact pieces 18 are moved back to the above initial position under the action of the elastic member 19 due to the disappearance of centrifugal force. During this period, the rod body 23 will slide inward in its sliding hole, and the pull tooth 26 will push the pull rod 25, thereby driving the opening and closing plate 24 to rotate to close the corresponding air injection hole 21. Similarly, the subsequent pull tooth 26 will also bounce to meet the retraction of the rod body 23 in the sliding hole.

[0037] Among them, in the above step three, the retraction of the rod body 23 in the sliding hole will push the air in the airflow channel 20 to be ejected from the jet hole 21 in the open state, that is, it will be ejected from the jet hole 21 corresponding to the clamping plate pressed by the friction unit 16, thereby achieving targeted jet heat dissipation for this part of the clamping plate.

[0038] In a preferred example, a plurality of connecting bolts are connected between the cover plate 4 and the stator 1, and the plurality of connecting bolts are evenly spaced along the circumferential direction. The friction unit 16 is slidably fitted between two adjacent connecting bolts, that is, the connecting bolts provide axial sliding guidance for the friction unit 16. In other possible examples, a sliding rail or the like may be provided on the inner wall of the brake housing to provide sliding guidance for the friction unit 16, and the specific sliding method of the friction unit 16 is not limited in this disclosure.

[0039] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A structurally compact brake, comprising a stator (1), an armature (2), a rotor (3) and a cover plate (4) arranged axially in sequence, characterized in that: On the end face of the rotor (3), a plurality of connecting holes (5) are circumferentially formed. An installation plate (6) is also connected to the rotor (3). On the end face of the installation plate (6), a plurality of transmission pins (7) are provided. The plurality of transmission pins (7) are respectively adapted to the plurality of connecting holes (5). The installation plate (6) is adapted to be connected to a rotating mechanism.

2. The compact brake according to claim 1, characterized in that: The installation plate (6) is fitted in the cover plate (4).

3. The compact brake according to claim 1 or 2, characterized in that: Installation holes (8) are formed in the installation plate (6), and the transmission pins (7) are in interference fit in the installation holes (8).

4. The compact brake according to claim 1 or 2, characterized in that: The rotor (3) includes a plurality of braking discs (9) stacked on top of each other.

5. The compact brake according to claim 4, characterized in that: Between the armature (2) and the cover plate (4), a plurality of friction plates (10) are also slidably arranged along the axial direction. The plurality of braking discs (9) and the plurality of friction plates (10) are arranged alternately in the axial direction, and the braking discs (9) and the friction plates (10) at least partially overlap in the radial direction. When the armature (2) is ejected, it can push the plurality of friction plates (10) and the plurality of braking discs (9) to move towards the cover plate (4) side.

6. The compact brake according to claim 4, characterized in that: A bushing (11) is arranged in the connecting hole (5) of the braking disc (9). An annular clamping groove (12) is formed on the outer peripheral surface of the bushing (11), and the braking disc (9) is clamped in the annular clamping groove (12).

7. The compact brake according to claim 6, characterized in that: The connecting hole (5) of the braking disc (9) has a notch (13) communicating with the inner wall of the braking disc (9).

8. The compact brake according to claim 5, wherein: The friction plate (10) includes a plate body (14) and friction blocks (15) arranged on the side wall of the plate body (14).

9. The compact brake according to claim 5 or 8, characterized in that: The friction plate (10) includes a plurality of relatively independent friction units (16) distributed circumferentially. Each friction unit (16) is adapted to be able to slide axially.

10. The compact brake according to claim 9, characterized in that: The braking disc (9) includes a disc body (17). A plurality of abutting pieces (18) are slidably arranged on the outer peripheral surface of the disc body (17). An elastic member (19) is connected between the abutting pieces (18) and the disc body (17). Under the action of centrifugal force, the elastic member (19) deforms so that the abutting pieces (18) change the overlapping area with the friction units (16) in the radial direction; An air flow channel (20) is formed in the disc body (17). Air jet holes (21) are formed on the outer peripheral surface of the braking disc (9) beside each abutting piece (18). The air jet holes (21) communicate with the air flow channel (20); The abutting piece (18) includes a piece body (22) and a rod body (23) that is hermetically and slidably fitted to the disc body (17). The sliding hole of the rod body (23) communicates with the air flow channel (20); An opening and closing plate (24) is rotatably arranged in the air jet hole (21). The rotating shaft of the opening and closing plate (24) extends into the sliding hole of the rod body (23), and a pulling rod (25) is arranged on the rotating shaft of the opening and closing plate (24). A plurality of elastic teeth (26) are elastically arranged on the side wall of the rod body (23). The plurality of elastic teeth (26) are arranged in sequence along the axial direction.

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