An integrated mounting encoder electromagnetic brake

Abstract

This invention discloses an integrated encoder electromagnetic brake, belonging to the field of brake technology. It includes a base assembly, an electromagnetic mechanism, a braking mechanism, an encoder assembly, and a release mechanism. The base assembly is enclosed by an upper cover plate and a flange plate forming a closed cavity. The rotor shaft of the electromagnetic mechanism is supported on the flange plate and the upper cover plate, and the stator is installed between the flange plate and the upper cover plate. The armature of the braking mechanism is sleeved on the rotor shaft, and a friction plate is installed on the inner side of the flange plate opposite to the armature. An elastic element causes the armature to press against the friction plate to achieve braking. The induction magnetic ring of the encoder assembly is installed at the extended end of the rotor shaft, and the encoder is installed on the outer side of the upper cover plate, forming a detection air gap opposite to the induction magnetic ring. The thrust shaft of the release mechanism is coaxial with the rotor shaft and can move axially. One end of the thrust shaft abuts against the inner side of the armature, and the other end engages with a handle. Rotating the handle drives the thrust shaft to move axially, separating the armature from the friction plate. The structure is compact and highly integrated.

Description

Technical Field

[0001] This invention belongs to the field of brake technology, and more specifically, relates to an electromagnetic brake with an integrated encoder. Background Technology

[0002] In the field of precision transmission and control, electromagnetic brakes are key functional components for achieving precise braking and position holding of equipment. However, existing electromagnetic brakes generally suffer from fixed structures and limited functions. When they need to be used in conjunction with encoders to achieve speed and position detection functions, they often face the dilemma of poor compatibility and cumbersome installation. In practice, it is usually necessary to design complex mounting brackets and adjust the transmission structure. This significantly increases the overall size, complexity, and manufacturing cost of the equipment. On the other hand, it is also very easy to introduce cumulative assembly errors, leading to a decrease in the detection accuracy of the encoder, and may even cause operational failures such as mechanical interference. Existing technical solutions have obvious shortcomings in terms of space utilization, functional integration, and ease of installation, which restricts the development of equipment towards compactness, high precision, and high reliability. Therefore, there is a need for an electromagnetic brake that can overcome space constraints with a compact structure and achieve a highly integrated design. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an integrated encoder electromagnetic brake that can meet the requirements of compact structure, high installation accuracy and high integration.

[0004] This invention discloses an integrated encoder electromagnetic brake, comprising a base assembly, an electromagnetic mechanism, a braking mechanism, an encoder assembly, and a release mechanism. The base assembly includes a flange plate and a top cover plate, the top cover plate and the flange plate being fixedly connected and together forming a closed receiving cavity. The electromagnetic mechanism includes a rotor shaft, a stator, and a coil assembly. The rotor shaft is rotatably supported on the base assembly, the stator is fixedly installed between the flange plate and the top cover plate, and the coil assembly is embedded in the stator. The braking mechanism includes an axially movable armature, a friction plate, and an elastic element. The armature is axially movable and sleeved on the rotor shaft. The friction plate is fixedly installed on the end face of the flange plate facing the inside of the receiving cavity and is opposite to the armature. The elastic element is installed on the side of the armature away from the friction plate and is used to provide an elastic force to press the friction plate. The component can achieve braking by pressing the armature against the friction plate through elastic force. The armature can be attracted or separated under the control of the electromagnetic mechanism to achieve brake release or braking. The encoder assembly includes an encoder and a sensing element. The sensing element is mounted on the rotor shaft. The encoder is fixedly mounted on one side of the upper cover plate and is arranged opposite to the sensing magnetic ring to form a detection air gap. The release mechanism includes a thrust shaft and a handle. The thrust shaft is coaxial with the rotor shaft and can move axially. One end face of the thrust shaft is located between the armature and the elastic element and abuts against the inner side of the armature to form a transmission connection. The other end can cooperate with the handle to move axially. The handle is rotatably mounted on the base assembly. When the handle is rotated, the thrust shaft can be driven to move axially to overcome the elastic force of the elastic element, thereby driving the armature to move and thus separating the armature from the friction plate.

[0005] As a further improvement of the present invention, the sensing element is selected as a sensing magnetic ring. One end of the rotor shaft connected to the upper cover plate extends outward from the end face of the upper cover plate. The sensing magnetic ring is fixedly installed on the end of the rotor shaft that extends outward. The encoder is fixedly installed on the outer end face of the upper cover plate, and is arranged opposite to the sensing magnetic ring to form a detection air gap.

[0006] As a further improvement of the present invention, the braking mechanism also includes a brake block, which is sleeved on the rotor shaft and circumferentially locked to the rotor shaft. The friction plate is sleeved on the outside of the brake block and circumferentially locked to the brake block and can slide along the axial direction of the brake block. The rotor shaft and the armature are connected by the brake block, which not only ensures the synchronous rotation of the armature and the rotor shaft, but also realizes the axial movement freedom of the armature.

[0007] As a further improvement of the present invention, it also includes at least one spherical steel column. At least one arc-shaped first groove is formed on the end face of the handle facing the stator, and three arc-shaped second grooves corresponding to the first groove are formed on the end face of the stator facing the handle. Half of the spherical steel column is movably embedded in the first groove, and the other half is movably embedded in the corresponding second groove. The diameter of either the first groove or the second groove is the same as the diameter of the spherical steel column, and the diameter of the other groove is larger than the diameter of the spherical steel column. When the handle is rotated, one end of the spherical steel column rolls in the groove larger than its diameter in the first groove or the second groove. Due to the squeezing force brought about by the rotation of the handle, the other end of the spherical steel column and the groove with a diameter equal to its diameter fit tightly together, thereby converting the rotation of the handle into axial movement, which in turn drives the thrust shaft to move axially to compress the elastic element, causing the armature to separate from the friction plate.

[0008] As a further improvement of the present invention, the elastic element is a torque spring, which is sleeved on the rotor shaft. One end of the torque spring abuts against the stator and the other end abuts against the end face of the thrust shaft. The elastic force of the torque spring is transmitted to the armature through the thrust shaft, so that the armature presses the friction plate to achieve braking when the power is off; when released, the thrust shaft compresses the torque spring, so that the armature separates from the friction plate.

[0009] As a further improvement of the present invention, the release mechanism also includes an elastic pin, which passes through the handle and is fixedly embedded in the stator end face. The handle is hinged to the stator end face through the elastic pin. This hinge method has a simple structure and is easy to install, allowing the handle to rotate around the axis of the elastic pin.

[0010] As a further improvement of the present invention, it also includes at least one spherical steel column. At least one arc-shaped first groove is formed on the end face of the handle facing the stator, and an arc-shaped second groove corresponding to the first groove is formed on the end face of the stator facing the handle. Half of the spherical steel column is movably embedded in the first groove, and the other half is movably embedded in the corresponding second groove. The diameter of either the first groove or the second groove is the same as the diameter of the spherical steel column, and the diameter of the other groove is larger than the diameter of the spherical steel column. When the handle is rotated, the spherical steel column rolls in the groove. Through the cooperation with the groove, the rotation of the handle is converted into axial movement, which in turn drives the thrust shaft to move axially. This structure realizes the conversion from rotation to linear motion, and the transmission is smooth and the wear is small.

[0011] As a further improvement of the present invention, a micro switch is also included. The micro switch is installed between the stator and the upper cover plate and is located below the handle. The lower end of the handle is provided with a trigger recess, and the top of the micro switch is provided with an actuating block that matches the trigger recess. When the handle is rotated to a predetermined position, the actuating block is engaged in the trigger recess, triggering the micro switch to change the output state. The micro switch can detect whether the handle has been rotated to the release position, and the output state signal is used to control the system to identify the release operation state.

[0012] As a further improvement of the present invention, a noise-reducing shim is also included. The noise-reducing shim is sleeved on the thrust shaft and located between the end face of the handle and the end face of the thrust shaft. It transforms the impact between iron and iron into the impact between iron and the noise-reducing shim, which can reduce the friction between the handle and the thrust shaft, reduce noise and protect the contact surface, while adjusting the axial clearance.

[0013] As a further improvement of the present invention, the base assembly also includes a dust cover and an equalizing sleeve. The dust cover is disposed between the flange plate and the stator and is located on the outer ring of the armature and friction plate. It can effectively prevent external dust and debris from entering the brake mechanism and improve the protection level and service life of the device. The equalizing sleeve is used to ensure the installation accuracy and gap between the stator and the flange plate.

[0014] As a further improvement of the present invention, the end face of the armature near the stator is coated with a sound-silencing coating, which can effectively absorb the impact noise generated when the armature is attracted, and reduce noise pollution during the operation of the device.

[0015] As a further improvement of the present invention, a protective coil is provided at the lower end of the stator to protect the lead wires of the coil assembly and prevent the lead wires from wearing or breaking.

[0016] As a further improvement of the present invention, an O-ring is fitted on the brake block for sealing and dust prevention.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the encoder, electromagnetic mechanism, braking mechanism and release mechanism are integrated into the same base assembly, the encoder is installed on the outside of the upper cover plate and the induction magnetic ring is installed on the end of the rotor shaft, the axial layout is compact and the overall axial dimension is shortened; the encoder is fixedly installed on the upper cover plate and is arranged opposite to the induction magnetic ring at the end of the rotor shaft, so it is not affected by the axial movement of the armature, the detection air gap is constant and the signal is stable and highly accurate. The rotation of the handle is converted into axial movement of the thrust shaft through the cooperation of the spherical steel column and the arc groove, realizing the release function. The structure is simple, the transmission is smooth and highly reliable. The integrated micro switch can accurately detect whether the release operation is in place by cooperating with the trigger recess at the lower end of the handle and the contact block at the top of the micro switch. The output status signal is used for control system feedback. The end of the armature near the stator is coated with a sound-silencing coating to effectively absorb the impact noise of the attraction and reduce the noise pollution during the operation of the device. Multiple protective structures such as dust cover, O-ring, and protective coil are set to effectively prevent dust and debris from entering the device and extend its service life. The installation accuracy between the stator and the flange plate is ensured by the equal height sleeve, ensuring the coaxiality of each component and improving the stability and reliability of the device operation. A sound-silencing gasket is provided to reduce noise and protect the contact surface. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the present invention; Figure 3 This is an exploded structural diagram of the braking mechanism and the release mechanism of the present invention; Figure 4 This is an exploded structural diagram of the stator and release mechanism of the present invention; Figure 5 This is a schematic diagram of the front sectional view of the present invention; Figure 6 This is a schematic diagram of the handle and micro switch of the present invention; Figure 7 This is a schematic diagram of the brake block structure of the present invention; Figure 8 For the present invention Figure 5 A magnified schematic diagram of the structure of region a in the middle.

[0019] Explanation of the labels in the diagram: Base assembly 1; Flange plate 11; Top cover plate 12; Dust cover 13; Equal height sleeve 14; Electromagnetic mechanism 2; Rotor shaft 21; Stator 22; Coil assembly 23; Braking mechanism 3; Armature 31; Friction plate 32; Torque spring 33; Brake block 34; O-ring 35; Encoder assembly 4; Encoder 41; Induction magnetic ring 42; Release mechanism 5; Thrust shaft 51; Handle 52; Elastic pin 53; Micro switch 6; Spherical steel column 7; Silent pad 8; Protective coil 9. Detailed Implementation

[0020] Specific Implementation Example 1: Please refer to... Figures 1-8 This invention relates to an integrated encoder electromagnetic brake, comprising a base assembly 1, an electromagnetic mechanism 2, a braking mechanism 3, an encoder assembly 4, a release mechanism 5, and three spherical steel columns 7. The base assembly 1 includes a flange plate 11 and an upper cover plate 12, which are fixedly connected to the flange plate 11 by bolts and together form a closed receiving cavity. The electromagnetic mechanism 2 includes a rotor shaft 21, a stator 22, and a coil assembly 23. The two ends of the rotor shaft 21 are rotatably supported on the flange plate 11 and the upper cover plate 12 by bearings, respectively. Specifically, the end of the rotor shaft 21 near the flange plate 11 is supported in the center hole of the flange plate 11 by a first oil-impregnated bearing, and the end near the upper cover plate 12 is supported in the center hole of the upper cover plate 12 by a second oil-impregnated bearing. The stator 22 is fixedly installed between the flange plate 11 and the upper cover plate 12 and is located in the receiving cavity. The coil assembly 23 is embedded in the stator 22, and its lead wire is led out to the outside of the receiving cavity through a protective coil provided at the lower end of the stator 22 and connected to an external power supply. The braking mechanism 3 includes an armature 31, a friction plate 32, a torque spring 33, and a brake block 34. The brake block 34 is sleeved on the rotor shaft 21 and is circumferentially locked to the rotor shaft 21 through a spline connection, and can slide axially along the rotor shaft 21. The armature 31 is sleeved on the outside of the brake block 34 and is circumferentially locked to the brake block 34 through a spline connection, and can slide axially along the brake block 34. The friction plate 32 is fixedly installed on the end face of the flange plate 11 facing the inner side of the receiving cavity and is arranged opposite to the armature 31. The torque spring 33 is sleeved on the rotor shaft 21, with one end abutting against the stator 22 and the other end abutting against the end face of the thrust shaft 51, and is used to provide an elastic force to the armature 31 to press the friction plate 32 through the thrust shaft 51. The encoder assembly 4 includes an encoder 41 and a sensing magnetic ring 42. One end of the rotor shaft 21 connected to the upper cover plate 12 extends outward from the end face of the upper cover plate 12. The sensing magnetic ring 42 is fixedly installed on the extended end of the rotor shaft 21 by an interference fit. The encoder 41 is fixedly installed on the outer end face of the upper cover plate 12 by screws. Its sensing end is arranged opposite to the sensing magnetic ring 42 and forms a tiny detection air gap for real-time detection of the rotation angle and speed of the rotor shaft 21. The release mechanism 5 includes a thrust shaft 51, a handle 52, and an elastic pin 53. The thrust shaft 51 is sleeved on the rotor shaft 21 and can slide axially along the rotor shaft 21. One end face of the thrust shaft 51 is located between the armature 31 and the torque spring 33, and abuts against the inner side of the armature 31 to form a transmission connection. The elastic pin 53 passes through the handle 52 and is fixedly embedded in the end face of the stator 22. The handle 52 is hinged to the end face of the stator 22 through the elastic pin 53. Three arc-shaped first grooves are evenly formed circumferentially on the end face of the handle 52 facing the stator 22. Three arc-shaped second grooves, corresponding one-to-one with the first grooves, are evenly distributed along the circumference on the end face of the handle 52. Half of each spherical steel column 7 is movably embedded in the corresponding first groove, and the other half is movably embedded in the corresponding second groove. The other end of the thrust shaft 51 is engaged with the handle 52. When the handle 52 is rotated, it is driven by the spherical steel column 7 to generate axial movement. The end face of the handle 52 pushes the end face of the thrust shaft 51 through the silent pad 8, causing the thrust shaft 51 to slide axially along the rotor shaft 21, thereby compressing the torque spring 33 and causing the armature 31 to move.

[0021] In a further embodiment, such as Figure 8 As shown, the diameter of the second groove is the same as the diameter of the spherical steel column 7, and the diameter of the first groove is slightly larger than the diameter of the spherical steel column 7 to allow the steel column to roll in the groove. The diameter of the spherical steel column 7 is 4mm.

[0022] In a further embodiment, such as Figures 5-6As shown, it also includes a micro switch 6, which is installed between the stator 22 and the upper cover plate 12 and is located below the handle 52. The lower end of the handle 52 is provided with a trigger recess, and the top of the micro switch 6 is provided with an actuating block that matches the trigger recess. When the handle 52 is rotated to a predetermined position, the actuating block is engaged in the trigger recess, triggering the micro switch 6 to change the output state.

[0023] In a further embodiment, such as Figure 3 As shown, a noise-reducing shim 8 is provided between the end face of the thrust shaft 51 away from the armature 31 and the end face of the handle 52. The noise-reducing shim 8 is sleeved on the thrust shaft 51 to reduce friction and adjust the axial clearance.

[0024] In a further embodiment, such as Figure 5 As shown, the base assembly also includes a dust cover 13 and an equalizing sleeve 14. The dust cover 13 is disposed between the flange plate 11 and the stator 22, and is located on the outer ring of the armature 31 and the friction plate 32. The equalizing sleeve 14 is disposed between the outer ring of the friction plate 32 and the inner ring of the dust cover 13, and is used to ensure the installation accuracy and clearance between the stator 22 and the flange plate 11.

[0025] In a further embodiment, such as Figure 3 As shown, the end face of the armature 31 near the stator 22 is coated with a noise-absorbing coating to absorb the impact noise generated when the armature is engaged.

[0026] In a further embodiment, such as Figure 7 As shown, it also includes an O-ring 35, which is fitted onto the brake block 34 for sealing and dust prevention.

[0027] In a further embodiment, such as Figures 4-5 As shown, a protective coil 9 is provided at the lower end of the stator 22 to protect the leads of the coil assembly 23 and prevent the leads from wearing or breaking.

[0028] During operation, in normal power-on state: the coil assembly 23 is energized, the stator 22 generates electromagnetic force to attract the armature 31, causing the armature 31 to overcome the elastic force of the torque spring 33 and move towards the stator 22, separating from the friction plate 32, the brake is released, the rotor shaft 21 rotates under external power drive, and drives the armature 31 to rotate synchronously through the brake block 34. The induction magnetic ring 42 rotates with the rotor shaft 21, and the encoder 41 detects the rotation angle and speed of the induction magnetic ring 42 in real time and outputs position and speed signals; Power-off braking state: When the coil assembly 23 is de-energized, the electromagnetic force disappears, and the elastic force of the torque spring 33 pushes the thrust shaft 51. The thrust shaft 51 pushes the armature 31 to press the friction plate 32, and the rotor shaft 21 is braked and locked by the friction torque. Release State: In the power-off state, rotating the handle 52 causes it to rotate around the elastic pin 53. The spherical steel column 7 rolls in the second groove of the stator 22. By engaging with the first groove of the handle 52, the rotation of the handle 52 is converted into axial movement of the handle 52. The axial movement of the handle 52 pushes the thrust shaft 51 to move axially through the silent pad 8. The thrust shaft 51 compresses the torque spring 33, pushing the armature 31 to move away from the friction plate 32, thus separating the armature 31 from the friction plate 32 and releasing the brake. When the handle 52 is rotated to the release position, the contact block at the top of the micro switch 6 engages with the trigger recess at the bottom of the handle 52, triggering the micro switch 6 to change its output state and send a signal to the external control system indicating that the release operation is complete. When the handle 52 is rotated in the opposite direction to reset, the contact block exits from the trigger recess, the micro switch 6 resets, the output state changes, and the release is indicated.

Claims

1. An integrated mounting encoder electromagnetic brake, characterized by: The system includes a base assembly (1), an electromagnetic mechanism (2), a braking mechanism (3), an encoder assembly (4), and a release mechanism (5). The base assembly (1) includes a flange plate (11) and a top cover plate (12). The top cover plate (12) is fixedly connected to the flange plate (11) and together they form a closed receiving cavity. The electromagnetic mechanism (2) includes a rotor shaft (21), which is rotatably supported on the base assembly (1). The braking mechanism (3) includes an axially movable armature (31), a friction plate (32), and an elastic element. The armature (31) is axially movable and is mounted on the rotor shaft (21). The friction plate (32) is fixedly mounted on the end face of the flange plate (11) facing the inside of the receiving cavity and is positioned opposite to the armature (31). The elastic element is used to provide... The elastic force of the pressing friction plate (32); the encoder assembly (4) includes an encoder (41) and a sensing element. The sensing element is mounted on the rotor shaft (21). The encoder (41) is fixedly mounted on one side of the upper cover plate (12) and is set opposite to the sensing magnetic ring (42) to form a detection air gap. The release mechanism (5) includes a thrust shaft (51) and a handle (52). The thrust shaft (51) is coaxially arranged with the rotor shaft (21) and can move axially. One end of the thrust shaft (51) is connected to the armature (31) for transmission, and the other end can cooperate with the handle (52) to move axially. When the handle (52) rotates, it can drive the thrust shaft (51) to move axially to overcome the elastic force of the elastic element, thereby driving the armature (31) to move, so that the armature (31) is separated from the friction plate (32).

2. An integrated mounting encoder electromagnetic brake according to claim 1, wherein: The electromagnetic mechanism (2) also includes a stator (22) and a coil assembly (23). The stator (22) is fixedly installed between the flange plate (11) and the upper cover plate (12), and the coil assembly (23) is embedded in the stator (22).

3. An integrated mounting encoder electromagnetic brake according to claim 1, wherein: The braking mechanism (3) also includes a brake block (34), which is sleeved on the rotor shaft (21) and circumferentially locked to the rotor shaft (21). The friction plate (32) is sleeved on the outside of the brake block (34) and circumferentially locked to the brake block (34) and can slide along the axial direction of the brake block (34).

4. An integrated mounting encoder electromagnetic brake according to claim 1, wherein: The elastic element is a torque spring (33), which is sleeved on the rotor shaft (21), with one end abutting against the stator (22) and the other end abutting against the end face of the thrust shaft (51).

5. An integrated mounting encoder electromagnetic brake according to claim 1, wherein: The release mechanism (5) also includes an elastic pin (53), which passes through the handle (52) and is fixedly embedded on the end face of the stator (22). The handle (52) is hinged to the end face of the stator (22) through the elastic pin (53).

6. An integrated mounting encoder electromagnetic brake according to claim 1, wherein: It also includes at least one spherical steel column (7), and at least one arc-shaped first groove is provided on the end face of the handle (52) facing the stator (22), and three arc-shaped second grooves corresponding to the first groove are provided on the end face of the stator (22) facing the handle (52). Half of the spherical steel column (7) is movably embedded in the first groove, and the other half is movably embedded in the corresponding second groove. The diameter of any one of the first groove and the second groove is the same as the diameter of the spherical steel column (7), and the diameter of the other groove is larger than the diameter of the spherical steel column (7).

7. An integrated mounting encoder electromagnetic brake according to claim 1, wherein: It also includes a micro switch (6), which is installed between the stator (22) and the top cover (12) and is located below the handle (52).

8. An integrated encoder electromagnetic brake according to claim 7, characterized in that: The lower end of the handle (52) is provided with a trigger recess, and the top of the micro switch (6) is provided with a trigger block that matches the trigger recess. When the handle (52) is rotated to a predetermined position, the trigger block is inserted into the trigger recess, triggering the micro switch (6) to change the output state.

9. An integrated encoder electromagnetic brake according to claim 1, characterized in that: It also includes a noise-reducing pad (8), which is fitted onto the thrust shaft (51) and located between the end face of the handle (52) and the end face of the thrust shaft (51).

10. An integrated encoder electromagnetic brake according to claim 1, characterized in that: The base assembly (1) also includes a dust cover (13), which is fixed between the flange plate (11) and the stator (22) and is located on the outer ring of the armature (31) and the friction plate (32).

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