An electromagnetic brake and drive assembly cooperating with a seal for an electric motor

Abstract

The utility model discloses an electromagnetic brake and drive assembly sealed with motor cooperation, and the electromagnetic brake includes the casing of one side open structure, and the casing open side is provided with the apron, and the casing is provided with armature and friction plate with apron, its characterized in that, the side of apron away from the casing is suitable for with motor cooperation, and the edge area of the side of apron away from the casing extends first flanging, and the end face of first flanging is suitable for with motor pressure, and the inner periphery of first flanging is provided with first sealing washer, wherein, the height of first sealing washer is greater than the height of first flanging. Thus, the first flanging and corresponding first sealing washer are arranged in the apron area of electromagnetic brake and motor cooperation, to seal the gap existing between the apron and motor end face. In this way, the output shaft of motor through to the first center hole of electromagnetic brake area is sealed in, can effectively prevent liquid or dust etc. from first center hole, keeps good sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and in particular to an electromagnetic brake and drive assembly that are sealed in conjunction with a motor. Background Technology

[0002] An electromagnetic brake internally consists of an armature, brake pads, a spring, and an electromagnetic coil. The armature can move away from the brake pads under the influence of magnetic force, and can also move closer to the brake pads under the influence of the spring, thus creating braking. Currently, electromagnetic brakes are mainly adapted to motors. They typically connect to the motor's output shaft via a spline sleeve located at the center of the friction pads, thereby achieving braking of the motor's output shaft through the friction pads.

[0003] However, since the spline sleeve of the friction plate needs to pass through the output shaft of the motor, the spline sleeve actually connects the electromagnetic brake to the outside (i.e., towards the motor), which reduces the sealing effect of the electromagnetic brake.

[0004] In the prior art, electromagnetic brakes such as those in patent CN218670314U are usually designed to avoid gaps at the mating points of the electromagnetic brake housing in order to improve the sealing effect, but they do not solve the problem of poor sealing performance caused by the aforementioned spline sleeve. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an electromagnetic brake and drive assembly that are sealed to the motor. The electromagnetic brake that is sealed to the motor can be fitted to the motor and form a good seal.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] In a first aspect, this application discloses an electromagnetic brake that is sealed in conjunction with a motor, comprising a housing with one open side, a cover plate provided on the open side of the housing, an armature and a friction plate provided between the housing and the cover plate, characterized in that the side of the cover plate away from the housing is adapted to cooperate with the motor, and a first flange extends from the edge region of the side of the cover plate away from the housing, the end face of the first flange is adapted to press against the motor, and a first sealing ring is provided on the inner circumference of the first flange; wherein the height of the first sealing ring is greater than the height of the first flange.

[0008] Its effect is as follows: a first flange and a corresponding first sealing ring are provided in the cover plate area where the electromagnetic brake and the motor cooperate to seal the gap between the cover plate and the motor end face. In this way, the first central hole through which the motor output shaft passes to the electromagnetic brake area is sealed inside, which can effectively prevent liquids or dust from entering from the first central hole and maintain a good sealing effect.

[0009] Furthermore, a second flange and a third flange extend from the side of the cover plate away from the housing. A first central hole for the motor shaft to pass through is provided at the center of the cover plate. The second flange is an annular flange surrounding the first central hole, and the third flange is an annular flange surrounding the second flange. The annular gap defined between the second flange and the third flange is suitable for setting a second sealing ring. The height of the second sealing ring is greater than the height of the second flange and the third flange.

[0010] Furthermore, the height of the first flange is greater than the heights of the second and third flanges, and the thickness of the second sealing ring is greater than the spacing of the annular interval.

[0011] Furthermore, the cover plate has a first central hole in the central area for the motor shaft to pass through, the first central hole is surrounded by a third flange, and the outer periphery of the third flange is wrapped with absorbent material.

[0012] Furthermore, the cover plate includes an inner plate body disposed adjacent to the friction plate, and an outer plate body disposed on the side of the inner plate body away from the friction plate; the first flange, the second flange and the third flange are all disposed on the side of the outer plate body away from the inner plate body, and the outer plate body cooperates with the edge of the open side of the housing to seal the inner plate body inside.

[0013] Furthermore, the peripheral wall of the inner plate abuts against the mating area of ​​the outer plate and the shell, forming a seal on the gap at the mating area of ​​the open side edge of the outer plate and the shell.

[0014] Furthermore, the shell has a stepped structure on its open side, the stepped structure including an L-shaped surface and a top surface continuous with the L-shaped surface, the two side walls of the L-shaped surface being respectively attached to the thickness-direction side wall and the peripheral side wall of the inner plate, and the top surface being tightly attached to the outer plate.

[0015] Furthermore, a fourth flange extends from the peripheral edge of the outer plate facing the shell, and the end face of the fourth flange is in contact with the top surface. The peripheral side of the inner plate is simultaneously in close contact with the L-shaped surface and the fourth flange.

[0016] Furthermore, a second central hole is provided at the center of the inner plate, and the first central hole and the second central hole are coaxially arranged.

[0017] Secondly, this application discloses a drive assembly, including: a motor; and an electromagnetic brake that is sealed to cooperate with the motor, wherein the motor shaft of the motor is disposed within the electromagnetic brake and cooperates with the spline sleeve of the friction plate within the electromagnetic brake. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural schematic diagram of an electromagnetic brake that is sealed in conjunction with a motor according to some embodiments of this application;

[0019] Figure 2 This is a schematic diagram of an electromagnetic brake structure that is sealed in conjunction with a motor, according to some embodiments of this application;

[0020] Figure 3 This is a schematic diagram from another angle of an electromagnetic brake structure that is sealed in conjunction with a motor, according to some embodiments of this application.

[0021] In the picture:

[0022] 100-Electromagnetic brake;

[0023] 110 - Shell, 111 - Groove, 112 - L-shaped surface, 113 - Top surface;

[0024] 120 - Cover plate, 121 - First flange, 122 - First center hole, 123 - Second flange, 124 - Third flange, 125 - Fourth flange;

[0025] 11-inner plate body, 101-second center hole, 12-outer plate body;

[0026] 130 - Friction plate, 131 - Spline sleeve;

[0027] 140-Armor. Detailed Implementation

[0028] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] See Figures 1-3 This utility model provides a technical solution:

[0030] refer to Figure 1According to an embodiment of this application, an electromagnetic brake 100 that is sealed in conjunction with a motor includes a housing 110 with one open side. A cover plate 120 is provided on the open side of the housing 110. A friction plate 130 and an armature 140 are sequentially arranged between the housing 110 and the cover plate 120. A groove 111 is formed inside the housing 110, surrounding the inner periphery of the housing 110. An electromagnetic coil and a return spring (not shown in the figure) are arranged within the groove 111. The electromagnetic coil is used to magnetically attract the armature 140 away from the brake disc to engage braking. The return spring is adapted to push the armature 140 towards the friction plate 130 to form braking. The housing 110 may be made of aluminum alloy and has a cylindrical structure. Its open side is fixedly connected to the cover plate 120 by bolts to form a sealed chamber for housing the aforementioned armature 140, friction plate 130, and other components.

[0031] Specifically, the electromagnetic coil is embedded in the bottom groove 111 of the housing 110 and connected to an external power source via a wire; when the coil is energized, it generates a magnetic force that attracts the armature 140. The spring is positioned between the electromagnetic coil and the armature 140 to provide a restoring force. The armature 140 is a ring-shaped ferromagnetic component that can move axially: under the action of the magnetic force, the armature 140 overcomes the spring force and moves away from the friction plate 130 (i.e., toward the bottom of the housing 110), releasing the brake; under the action of the spring, the armature 140 moves toward the friction plate 130, pressing the friction plate 130 to form a brake.

[0032] The friction plate 130 is located between the armature 140 and the cover plate 120, and a spline sleeve 131 is fixed at its center. The spline sleeve 131 is made of wear-resistant alloy steel and has an axial spline groove on its inner wall for meshing with the output shaft of the motor. The friction plate 130 transmits braking force through the spline sleeve 131 to lock the output shaft of the motor.

[0033] The side of the cover plate 120 away from the housing 110 is adapted to cooperate with the motor, and a first flange 121 extends from the edge region of the side of the cover plate 120 away from the housing 110. Thus, when the electromagnetic brake 100 is fixed to the motor, the end face of the first flange 121 is adapted to press against the motor; of course, the electromagnetic brake 100 and the motor can be fixed in any way, for example, by bolting the electromagnetic brake 100 to the motor.

[0034] In this embodiment, a first sealing ring (not shown in the figure) is provided on the inner circumference of the first flange 121. The height of the first sealing ring is greater than the height of the first flange 121. During installation, the first sealing ring can be inserted into the inner ring of the first flange 121. After the motor is connected to the electromagnetic brake 100, the pressing action between the cover plate 120 and the motor end face stabilizes the first sealing ring. The first sealing ring on the inner circumference of the first flange 121 can be a rubber O-ring, with its height designed to extend beyond the end face of the first flange 121. Thus, when the electromagnetic brake 100 is assembled with the motor, the cover plate 120 is bolted to the motor end face, causing the first flange 121 to be tightly pressed against the motor end face, and the first sealing ring is pressed tightly against the motor end face.

[0035] like Figure 1 and Figure 2 As shown, a first central hole 122 for the motor shaft to pass through is provided at the center of the cover plate 120. Based on the first flange 121 and the first sealing ring, the first central hole 122 can be sealed between the electromagnetic brake 100 and the motor mating surface.

[0036] It is understandable that a first flange 121 and a corresponding first sealing ring are provided in the area of ​​the cover plate 120 where the electromagnetic brake 100 mates with the motor, in order to seal the gap existing at the mating point between the cover plate 120 and the motor end face. In this way, the first central hole 122 through which the motor output shaft passes into the area of ​​the electromagnetic brake 100 is sealed inside, which can effectively prevent liquids or dust from entering from the first central hole 122 and maintain a good sealing effect.

[0037] Furthermore, in combination Figure 1 and Figure 2 As shown, a second flange 123 and a third flange 124 extend from the side of the cover plate 120 away from the housing 110. A first central hole 122 for the motor shaft to pass through is formed at the center of the cover plate 120. The second flange 123 is an annular flange surrounding the first central hole 122, and the third flange 124 is an annular flange surrounding the second flange 123. After the second flange 123 and the third flange 124 are coaxially arranged, a second sealing ring (not shown in the figure) is provided within the annular gap defined between the second flange 123 and the third flange 124. Thus, through the two-stage sealing of the first sealing ring and the second sealing ring, a better sealing effect can be achieved.

[0038] In some preferred embodiments, the height of the second sealing ring is greater than the heights of the second flange 123 and the third flange 124, and the thickness of the second sealing ring is greater than the spacing of the annular interval. On the one hand, the second sealing ring can be fixed between the second flange 123 and the third flange 124 by clamping force; on the other hand, the second sealing ring is subjected to the lateral compression of the second flange 123 and the third flange 124, and will bulge in the thickness direction (i.e., towards the motor end face), thereby better compressing and forming a seal with the end face of the motor.

[0039] Furthermore, the height of the first flange 121 can be set to be greater than the heights of the second flange 123 and the third flange 124. Specifically, as follows... Figure 1 As shown, by setting the second flange 123 and the third flange 124 slightly lower than the first flange 121, it is possible to ensure that the first flange 121 is in full contact with the motor end face. The rigid contact between the first flange 121 and the motor end face directly forms waterproofing, and the first sealing ring further seals the contact portion between the first flange 121 and the motor end face. The second flange 123 and the third flange 124 inside are mainly used to compress and fix the second sealing ring, so that the second sealing ring forms secondary waterproofing inside.

[0040] In some examples, the outer periphery of the third flange 124 may also be wrapped with absorbent material (not shown in the figure). After long-term use of the device, a small amount of liquid may seep into the space between the motor end face and the cover plate 120, and will first be absorbed by the absorbent material. In these examples, the cover plate 120 may not have a second flange 123 and a second sealing ring, and secondary waterproofing can be achieved solely through the absorbent material.

[0041] by Figures 1-3 In the corresponding exemplary embodiment, the cover plate 120 includes an inner plate 11 disposed adjacent to the friction plate 130, and an outer plate 12 disposed on the side of the inner plate 11 away from the friction plate 130. A first flange 121, a second flange 123, and a third flange 124 are all disposed on the side of the outer plate 12 away from the inner plate 11. The outer plate 12 engages with the edge of the open side of the housing 110 to seal the inner plate 11 inside. The inner plate directly contacts the friction plate 130 to form a brake. The outer plate 12 and the housing 110 together seal the inner plate 11 inside. In this example, refer to... Figure 1 As shown, a second central hole 101 is provided at the center of the inner plate 11, and the first central hole 122 and the second central hole 101 are coaxially arranged.

[0042] Furthermore, the peripheral sidewall of the inner plate 11 abuts against the mating area of ​​the outer plate 12 and the shell 110, thereby forming a seal at the gap at the mating area of ​​the open side edge of the outer plate 12 and the shell 110, so that the overall shape structure formed by the outer plate 12 and the shell 110 has a good sealing effect.

[0043] For more details, please refer to [link / reference]. Figure 1 As shown, the housing 110 has a stepped structure on its open side. The stepped structure includes an L-shaped surface 112 and a top surface 113 continuous with the L-shaped surface 112. The planar portion of the L-shaped surface 112 is fitted with the thickness-direction sidewall of the inner plate 11, and the vertical portion is fitted with the peripheral sidewall of the inner plate 11. The top surface 113 is in close contact with the outer plate 12. A fourth flange 125 extends from the peripheral edge of the outer plate 12 facing the housing 110. The end face of the fourth flange 125 is fitted with the top surface 113, so that the peripheral sidewall of the inner plate 11 is simultaneously in close contact with both the peripheral sidewall of the inner plate 11 and the fourth flange 125. Thus, through the aforementioned mating structure, a seal is formed by fitting the gap at the mating point using either a planar or curved surface, ensuring the overall sealing effect of the electromagnetic brake 100.

[0044] A drive assembly according to an embodiment of this application includes a motor and an electromagnetic brake 100 that is sealed to cooperate with the motor in the foregoing embodiments. The motor shaft of the motor is disposed within the electromagnetic brake 100 and cooperates with the spline sleeve 131 of the friction plate 130 within the electromagnetic brake 100.

[0045] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An electromagnetic brake that is sealed in conjunction with a motor, comprising a housing with one open side, a cover plate disposed on the open side of the housing, and an armature and a friction plate disposed between the housing and the cover plate, characterized in that, The side of the cover plate away from the housing is adapted to cooperate with the motor, and the edge region of the side of the cover plate away from the housing extends into a first flange. The end face of the first flange is adapted to press against the motor, and a first sealing ring is provided on the inner circumference of the first flange. The height of the first sealing ring is greater than the height of the first flange.

2. The electromagnetic brake that is sealed in conjunction with a motor according to claim 1, characterized in that, The cover plate extends a second flange and a third flange on the side away from the housing, and a first central hole for the motor shaft to pass through is provided at the center of the cover plate; The second flange is an annular flange surrounding the first central hole, and the third flange is an annular flange surrounding the second flange; The annular gap defined between the second flange and the third flange is suitable for setting a second sealing ring; wherein the height of the second sealing ring is greater than the height of the second flange and the third flange.

3. The electromagnetic brake that is sealed in conjunction with a motor according to claim 2, characterized in that, The height of the first flange is greater than the heights of the second and third flanges, and the thickness of the second sealing ring is greater than the spacing of the annular interval.

4. The electromagnetic brake that is sealed in conjunction with a motor according to claim 1, characterized in that, The cover plate has a first central hole in the central area for the motor shaft to pass through, and a third flange is provided around the first central hole. The outer periphery of the third flange is also wrapped with absorbent material.

5. The electromagnetic brake that is sealed in conjunction with a motor according to claim 2, characterized in that, The cover plate includes an inner plate body disposed adjacent to the friction plate, and an outer plate body disposed on the side of the inner plate body away from the friction plate; The first flange, the second flange, and the third flange are all located on the side of the outer plate away from the inner plate. The outer plate and the edge of the open side of the shell cooperate to seal the inner plate inside.

6. The electromagnetic brake that is sealed in conjunction with a motor according to claim 5, characterized in that, The peripheral wall of the inner plate abuts against the mating area of ​​the outer plate and the shell, forming a seal against the gap at the mating area of ​​the open side edge of the outer plate and the shell.

7. The electromagnetic brake that is sealed in conjunction with a motor according to claim 6, characterized in that, The shell has a stepped structure on its open side, the stepped structure including an L-shaped surface and a top surface continuous with the L-shaped surface, the two side walls of the L-shaped surface are respectively attached to the thickness direction side wall and the peripheral side wall of the inner plate, and the top surface is in close contact with the outer plate.

8. The electromagnetic brake that is sealed in conjunction with a motor according to claim 7, characterized in that, A fourth flange extends from the peripheral edge of the outer plate facing the shell, and the end face of the fourth flange is in contact with the top surface. The peripheral side of the inner plate is in close contact with both the L-shaped surface and the fourth flange.

9. The electromagnetic brake that is sealed in conjunction with a motor according to claim 5, characterized in that, A second central hole is provided at the center of the inner plate, and the first central hole and the second central hole are coaxially arranged.

10. A driving component, characterized in that, include: Electric motor; The electromagnetic brake that is sealed to cooperate with a motor according to any one of claims 1-9, wherein the motor shaft of the motor is disposed within the electromagnetic brake and cooperates with the spline sleeve of the friction plate inside the electromagnetic brake.

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