Electromagnetic brake with hand release and brake motor

Abstract

The electromagnetic brake comprises a brake assembly, an electromagnetic driver and a hand release assembly, and the hand release assembly comprises a shifting piece and a handle connected with the shifting piece; wherein the shifting piece is arranged on the side, away from the mounting plate, of the shell, the shifting piece is connected with the armature piece, and when the handle moves towards the axial side away from the brake pad, the shifting piece drives the armature piece to move towards the position away from the brake pad. The shifting piece is arranged on one axial side of the shell to keep the radial width of the whole brake unchanged, the shifting piece is connected with the handle and the armature piece, the armature piece and the brake pad are separated through axial displacement of the handle, manual release operation is achieved, and the manual release structure is simple and convenient to operate.

Description

Technical Field

[0001] This application relates to the technical field of brake motors, and in particular to an electromagnetic brake and brake motor with hand release. Background Technology

[0002] Electromagnetic brakes on the market are mainly used in the field of motors. Their working principle is that when the coil is energized, it generates a magnetic force to attract the armature plate, and the armature plate separates from the brake pad. At this time, the motor shaft can rotate normally synchronously with the brake pad. When the power is cut off, the coil loses its magnetic force, and the armature plate is pushed towards the brake pad under the action of the elastic element. The two abut against each other to limit the circumferential rotation of the brake pad, thereby locking the motor shaft.

[0003] Existing electromagnetic brakes generally also include a manual release mechanism. This mechanism allows manual unlocking of the shaft in the event of a power outage, typically necessary for motor maintenance or in emergency situations. A common example of a manual release mechanism is the "power-off brake" structure disclosed in utility model patent CN217421965U, which uses rotation to lift and rotate a push block, utilizing the rotation of the cam portion of the push block to separate the armature plate from the brake pad.

[0004] The aforementioned hand release mechanism, due to the setting of two push blocks, increases the overall radial width after being connected to the base. The brake is generally installed in the fan cover at the tail of the motor. Due to the increased radial width, the lateral width of the fan cover also needs to be increased to meet the installation requirements. The fan cover is also connected to the motor housing. To reduce the visual perception of being top-heavy, the size of the motor housing needs to match that of the fan cover, which in turn increases the width of the entire motor and increases manufacturing costs. Utility Model Content

[0005] In order to reduce the radial width of the electromagnetic brake and thus reduce the installation space in the radial direction of the shroud, the first objective of this application is to provide an electromagnetic brake with hand release.

[0006] The electromagnetic brake with manual release provided in this application adopts the following technical solution:

[0007] An electromagnetic brake with manual release, comprising:

[0008] A braking assembly, the braking assembly including a mounting plate, an armature plate connected to the mounting plate and capable of axial displacement relative to the mounting plate, and a brake pad disposed between the mounting plate and the armature plate and capable of relative rotation.

[0009] An electromagnetic actuator, located on one side of the armature plate and away from the mounting plate, includes a housing and a coil mounted within the housing. A first elastic element, which consistently forces the armature plate to move towards the brake pad side, is further disposed between the housing and the armature plate.

[0010] A hand release assembly, including a paddle and a handle connected to the paddle;

[0011] The paddle is located on the side of the housing away from the mounting plate. The paddle is connected to the armature plate. When the handle moves axially away from the brake pad, the paddle drives the armature plate to move away from the brake pad.

[0012] By adopting the above technical solution, the paddle is connected to the armature plate. By axially pulling the handle, the paddle is driven to move the armature plate axially, thereby realizing the relative displacement between the armature plate and the brake pad and realizing the manual release operation. The paddle is located on one side of the housing and does not increase in radial width, which can reduce the radial installation space in the windshield. At the same time, the manual release operation is simple and can be completed by simply pulling the handle axially.

[0013] Preferably, the hand release assembly further includes at least one lever, the two ends of which are connected to a paddle and an armature plate.

[0014] By adopting the above technical solution, the pull rod is configured to connect the lever and the armature plate.

[0015] Preferably, the paddle includes:

[0016] There are two symmetrically arranged support arms, and one end of the pull rod is connected to the support arm; and

[0017] The drive end is connected to the two arms;

[0018] One end of the handle is connected to the drive end, and the two arms are symmetrically distributed relative to the drive end.

[0019] By adopting the above technical solution, the force can be uniform when the two symmetrical arms are driven by the operating handle, and the structure connecting the two arms to the drive end can simplify the shape of the entire paddle and reduce the overall weight of the paddle.

[0020] Preferably, the housing has a wedge-shaped groove with a wedge-shaped surface inclined toward the paddle side; wherein the handle and the paddle are threadedly connected, and when the handle moves close to the housing and the end of the handle slides along the wedge-shaped surface, the paddle drives the armature plate to move away from the brake pad.

[0021] By adopting the above technical solution, when the handle rotates with the paddle, the threaded connection between the two allows the handle to move away from or towards the wedge groove. When the end of the handle presses against the wedge surface, the inclined surface pressure will push the handle and paddle to move axially, realizing the hand release operation. The threaded connection between the handle and the paddle can achieve self-locking of the handle in the axial direction. After the end of the handle comes into contact with the wedge surface, it can remain relatively stationary. Therefore, when the brake is manually released, self-locking can be achieved without manually applying force to keep the handle stationary. At the same time, the self-locking form of the threaded connection is more stable and can minimize vibration and prevent the handle from unlocking when locked.

[0022] Preferably, the hand release component further includes:

[0023] The anti-loosening sleeve has a through hole for the handle to pass through and a mounting groove communicating with the through hole;

[0024] At least one lock nut, the threaded connection being to the handle, wherein one end face of the lock nut abuts against a lock sleeve; and

[0025] The second elastic element is housed in the mounting groove, and its two ends abut against the bottom of the mounting groove and the lever, respectively.

[0026] By adopting the above technical solution, after the anti-loosening sleeve is connected to the handle, the anti-loosening nut is pressed against one end face of the anti-loosening sleeve, and the two ends of the second elastic element abut against the paddle and the anti-loosening sleeve. The elastic force of the second elastic element applies a force to the paddle, which increases the static friction between the second elastic element and the paddle, thereby reducing the possibility of the paddle rotating in a vibration environment and achieving the anti-loosening effect.

[0027] Preferably, the end of the handle is an arc end.

[0028] By adopting the above technical solution, the arc-shaped end structure can reduce friction and wear when the handle slides on the wedge-shaped surface, thus improving its service life.

[0029] In order to reduce the radial width of the electromagnetic brake and thus reduce the installation space in the radial direction of the shroud, the second objective of this application is to provide a brake motor.

[0030] The brake motor provided in this application adopts the following technical solution:

[0031] A brake motor includes a shaft and a hand-released electromagnetic brake connected to the shaft.

[0032] By adopting the above technical solution, the paddle is connected to the armature plate and the handle. The axial sliding of the handle can synchronously drive the axial displacement of the paddle and the armature plate to realize the hand release operation. The paddle is positioned on one side of the housing, which can minimize the radial width of the entire brake and reduce the radial installation space in the windshield.

[0033] Preferably, it also includes a wind shield, the electromagnetic brake is installed inside the wind shield, the wind shield has an elongated opening, one end of the handle extends out from the elongated opening inside the wind shield, and the handle can slide within the elongated opening.

[0034] By adopting the above technical solution, the wind cover is provided with an elongated opening to facilitate the extension of the handle from inside the wind cover, allowing the hand release operation to be performed from the outside.

[0035] Preferably, it also includes a fan shroud, and the rotating shaft includes a rear-exit section that extends out from inside the fan shroud.

[0036] By adopting the above technical solution, when the motor is in the hand-released state, the motor shaft can be driven to rotate by external driving force to control the movement of the load. The rear section on the shaft allows external tools, such as electric screwdrivers, to directly drive the shaft to rotate and control the movement of the load. This structure can achieve shaft rotation without disconnecting the load connected to the shaft, and is suitable for emergency operations, such as emergency opening of elevator doors.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. The radial width of the entire brake is kept constant by setting the paddle on one side of the housing axis. The paddle connects the handle and the armature plate. The axial displacement of the handle is used to separate the armature plate from the brake plate to realize the manual release operation. The manual release structure is simple and easy to operate.

[0039] 2. By opening a wedge-shaped groove on the housing and combining the handle and the paddle with a threaded connection, axial displacement can occur between the handle and the paddle when the hand is released. The handle and the wedge-shaped surface squeeze and push the paddle to move axially, thereby separating the armature plate and the brake plate, and keeping the handle in a relatively locked state when there is no external force.

[0040] 3. By setting the anti-loosening sleeve in combination with the anti-loosening nut and the second elastic element, the lever is pressed tightly, which can reduce the vibration generated by the motor operation and prevent the handle and lever from becoming loose. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the electromagnetic brake with hand release in Embodiment 1;

[0042] Figure 2 This is an exploded view of the electromagnetic brake with hand release in Embodiment 1 from one perspective.

[0043] Figure 3 This is an exploded view of the electromagnetic brake with hand release in Embodiment 1 from another perspective.

[0044] Figure 4 This is a cross-sectional view of the brake motor in Embodiment 2;

[0045] Figure 5 This is a schematic diagram of the brake motor in Example 2.

[0046] Explanation of reference numerals in the attached drawings: 10, mounting plate; 101, screw; 11, armature plate; 12, brake pad; 20, electromagnetic actuator; 21, housing; 211, wedge groove; 212, receiving groove; 213, limiting groove; 22, coil; 30, handle; 31, paddle; 311, support arm; 312, drive end; 32, anti-loosening sleeve; 321, mounting groove; 33, second elastic element; 34, disc nut; 35, anti-loosening nut; 40, pull rod; 41, nut; 50, guide post screw; 60, first elastic element; 70, motor module; 71, rotating shaft; 711, rear exit section; 72, end cover; 80, reduction module; 90, fan cover; 91, elongated opening. Detailed Implementation

[0047] The present application will be further described in detail below with reference to the accompanying drawings.

[0048] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example 1

[0050] See also Figures 1 to 3An electromagnetic brake with hand release is applicable to stopping rotating parts, such as the shaft 71 of a motor or shaft-type workpieces, and can also be applied to stopping the rotation of non-shaft-type workpieces. The electromagnetic brake specifically includes a brake assembly, an electromagnetic actuator 20, and a hand release assembly.

[0051] The electromagnetic driver 20 includes a housing 21 and a coil 22 installed inside the housing 21. When the coil 22 is energized, it causes the housing 21 to generate a magnetic force. The housing 21 is connected to a power source, which can be a 220V or 380V AC power source.

[0052] The brake assembly is located on one side of the housing 21, specifically including a mounting plate 10, a brake pad 12, and an armature plate 11. The brake pad 12 is positioned between the mounting plate 10 and the armature plate 11, and the armature plate 11 is positioned on one side of the housing 21. A receiving groove 212 is formed at the end of the housing 21 facing the armature plate 11. The entire brake assembly is installed within the receiving groove 212. The mounting plate 10, the armature plate 11, and the housing 21 are connected by several guide screws 50. Each guide screw 50 has a slidable section, and the armature plate 11 is slidably connected to the slidable section, allowing axial displacement relative to the housing 21 or the mounting plate 10. The brake pad 12 is positioned between the mounting plate 10 and the armature plate 11 to connect rotating components, allowing the brake pad 12 to rotate circumferentially relative to the mounting plate 10 or the armature plate 11.

[0053] The receiving groove 212 is also provided with several limiting grooves 213. A first elastic element 60 is provided in the limiting groove 213. One end of the first elastic element 60 is always in contact with the armature plate 11. When the coil 22 is energized and the housing 21 generates a magnetic force, the armature plate 11, which is a metal plate, overcomes the elastic force of the first elastic element 60 and is attracted to the housing 21 under the attraction of the magnetic force. At this time, the armature plate 11 and the brake pad 12 are in a separated state, and the brake pad 12 can rotate freely. When the coil 22 is de-energized, the armature plate 11 is displaced towards the brake pad 12 under the action of the first elastic element 60 and comes into contact with the brake pad 12. Since the armature plate 11 is circumferentially limited by the connection between the armature plate 11 and the mounting plate 10, the rotation of the brake pad 12 is locked to achieve braking.

[0054] The hand release assembly includes a handle 30 and a paddle 31. The paddle 31 is generally Y-shaped and includes two arms 311 and a drive end 312 connecting the two arms 311. The two arms 311 are symmetrically distributed on both sides of the drive end 312, which is L-shaped and connected to the handle 30.

[0055] Two arms 311 are connected to the armature plate 11 via corresponding pull rods 40. The paddle 31 is located on the opposite side of the housing 21 from the armature plate 11. The pull rods 40 pass through the armature plate 11 and are connected to the housing 21 and the arms 311. One end of the pull rods 40 is fixed to the paddle 31 by a threaded nut 41. The armature plate 11 is slidably connected to the pull rods 40, so that when the paddle 31 moves axially away from the housing 21, it can drive the armature plate 11 to move towards the housing 21, thus separating it from the brake pad 12. The handle 30 is threadedly connected to the drive end 312, so that the movement of the handle 30 can drive the paddle 31 to move.

[0056] The housing 21 has a wedge-shaped groove 211 on one end face. The wedge-shaped groove 211 has a wedge-shaped surface that is inclined toward the side of the paddle 31. The handle 30 is placed above the wedge-shaped groove 211. When the handle 30 is rotated, the handle 30 can move away from or closer to the side of the wedge-shaped groove 211. When the end of the handle 30 touches the wedge-shaped surface, the compression of the two can push the paddle 31 to move away from the side of the housing 21. Since the handle 30 and the paddle 31 are connected by a thread, the handle 30 can remain relatively stationary at any position on the wedge-shaped surface. Therefore, when the hand is released, there is no need to manually apply force to the handle 30 to keep the armature plate 11 and the brake plate 12 separated. To facilitate the rotation of the handle 30, a disc nut 34 is connected to one end of the handle 30.

[0057] Meanwhile, the hand release assembly also includes an anti-loosening sleeve 32, an anti-loosening nut 35, and a second elastic member 33. The anti-loosening sleeve 32 has a through hole for the handle 30 to pass through. The anti-loosening nut 35 is threadedly connected to the handle 30 and can abut against the end face of the anti-loosening sleeve 32. The second elastic member 33 can be accommodated in a mounting groove 321 opened in the anti-loosening sleeve 32. One side of the mounting groove 321 is open and faces the drive end 312. The two ends of the second elastic member 33 abut against the anti-loosening sleeve 32 and the drive end 312 respectively. The second elastic member 33 increases the vertical downward force on the paddle 31, increases the anti-loosening effect on the paddle 31, and effectively reduces the looseness between the handle 30 and the paddle 31.

[0058] When manual release is required, the handle 30 can be pulled to move axially away from the housing 21, and the paddle 31 can drive the armature plate 11 to separate from the brake pad 12 to unlock the brake; or the handle 30 can be rotated to move towards the wedge groove 211, and the paddle 31 can be pushed to move axially away from the housing 21 by the pressure between the end of the handle 30 and the wedge surface to unlock the brake. In this mode of operation, the handle 30 does not need to be kept stationary by external force. In order to reduce the pressure mode between the handle 30 and the wedge surface, the end of the handle 30 is set as an arc end. Example 2

[0059] See also Figure 4 and Figure 5 A brake motor includes a motor module 70 and a reduction module 80 connected to the motor module 70. The motor module 70 can be a servo motor or a stepper motor, and its speed is reduced by the connection with the reduction module 80 to output torque. A fan cover 90 is connected to the rear of the motor module 70. An electromagnetic brake with hand release, as in Embodiment 1, is installed inside the fan cover 90. A mounting plate 10 is connected to an end cover 72 by screws 101. A rotating shaft 71 passes through the electromagnetic brake and can rotate relative to the electromagnetic brake. The rotating shaft 71 and the brake pad 12 are fixedly connected and can rotate synchronously.

[0060] The wind cover 90 has a long opening 91 on one side of its outer wall that connects to the interior. One end of the handle 30 extends out from inside the wind cover 90 and can slide along the long opening 91. The rotating shaft 71 is a stepped shaft with a rear extension section 711 at the end. The rear extension section 711 also extends out from inside the wind cover 90. When the brake motor is de-energized, the operating handle 30 is released to unlock the rotation limit of the rotating shaft 71. The rotating shaft 71 can be rotated by connecting the rear extension section 711 with a tool.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electromagnetic brake with hand release, characterized in that, The brake assembly comprises a mounting plate (10), an armature plate (11) connected with the mounting plate (10) and axially displaceable relative to the mounting plate (10), and a brake pad (12) disposed between the mounting plate (10) and the armature plate (11) and rotatable relative to the mounting plate (10) and the armature plate (11); an electromagnetic driver (20) located on one side of the armature plate (11) and away from the mounting plate (10), the electromagnetic driver (20) comprising a housing (21) and a coil (22) mounted in the housing (21), and a first elastic member (60) provided between the housing (21) and the armature plate (11) and always urging the armature plate (11) to have a movement tendency towards the brake pad (12); and a hand release assembly comprising a knob (31) and a handle (30) connected with the knob (31); wherein the knob (31) is disposed on one side of the housing (21) and away from the mounting plate (10), the knob (31) is connected with the armature plate (11), and when the handle (30) moves towards the axial side away from the brake pad (12), the knob (31) drives the armature plate (11) to move away from the brake pad (12). The hand release assembly further comprises at least one pull rod (40), both ends of the pull rod (40) being connected with the knob (31) and the armature plate (11). The knob (31) comprises: two symmetrical supporting arms (311), one end of the pull rod (40) being connected with the supporting arms (311); and a driving end (312) connected with the two supporting arms (311); 2. The electromagnetic brake with hand release according to claim 1, characterized in that wherein one end of the handle (30) is connected with the driving end (312), and the two supporting arms (311) are symmetrically distributed relative to the driving end (312).

3. The electromagnetic brake with hand release of claim 2, wherein, The housing (21) is provided with a wedge-shaped slot (211) having a wedge-shaped surface inclined towards the side of the knob (31); wherein the handle (30) is threadedly connected with the knob (31), when the handle (30) moves towards the housing (21) and the end of the handle (30) slides along the wedge-shaped surface, the knob (31) drives the armature plate (11) to displace towards the side away from the brake pad (12). The hand release assembly further comprises: a lock sleeve (32) provided with a through hole for the handle (30) to pass through and a mounting slot (321) communicating with the through hole; at least one lock nut (35) threadedly connected with the handle (30), one end surface of one lock nut (35) abutting against the lock sleeve (32); and 4. The electromagnetic brake with hand release of claim 1, wherein, a second elastic member (33) accommodated in the mounting slot (321), both ends of the second elastic member (33) abutting against the bottom of the mounting slot (321) and the knob (31) respectively.

5. The electromagnetic brake with hand release of claim 4, wherein, The end of the handle (30) is a circular arc end. The electromagnetic brake with hand release comprises a rotating shaft (71) and the electromagnetic brake with hand release according to any one of claims 1-6 connected with the rotating shaft (71). ​ ​ 6. The electromagnetic brake with hand release of claim 4, wherein, ​ 7. A brake motor characterized by, ​ 8. The brake motor of claim 7 wherein, Further comprising a wind cover (90), the electromagnetic brake is installed in the wind cover (90), the wind cover (90) is provided with a long slot (91), one end of the handle (30) extends out of the wind cover (90) from the long slot (91), and the handle (30) can slide in the long slot (91).

9. The brake motor of claim 8 wherein, Further comprising a wind cover (90), the rotating shaft (71) comprises a rear section (711), and the rear section (711) extends out of the wind cover (90).

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