Vibration motor with overload protection

Abstract

The application provides a vibration motor with overload protection, and particularly relates to the technical field of electric motors, which comprises a main body, end covers installed at both ends of the main body, an integrated controller installed at the top of the main body, a stator rotating shaft rotatably arranged in the center of the main body, eccentric blocks connected to both ends of the stator rotating shaft, an overload detection device arranged on the integrated controller, a brake damage prevention mechanism arranged in the center of the inner side of the end cover, real-time monitoring through three parameters of current, temperature and rotating speed, avoiding misjudgment or omission of a single detection mode, improving the reliability and adaptability of the overload protection, and more importantly, after the power-off protection of the vibration motor, the electromagnet is synchronously powered off in time, the rigid rebound force of the strong spring drives the half-ring body to quickly adhere to the circular ring body, compared with the traditional power-off protection structure, the risk of winding burning or eccentric block falling caused by the continuous rotation of the rotating shaft during overload is avoided, and the safety and effectiveness of the overload protection of the vibration motor are improved.

Description

TECHNICAL FIELD

[0001] The application provides a vibration motor with overload protection, and particularly relates to the technical field of electric motors. BACKGROUND

[0002] The vibration motor is a power device for generating mechanical vibration through eccentric block rotation, and is used in industrial equipment such as screening and conveying. Energy saving is achieved by using high-efficiency permanent magnet motors or rare earth materials to reduce energy consumption, and by matching variable frequency control technology to adjust the vibration frequency as needed and improve energy utilization.

[0003] In the authorized announcement CN218733725U, a vibration motor with automatic alarm function is disclosed. When the vibration motor detects abnormal conditions, the threshold circuit breaker disconnects the mains to protect the vibration motor.

[0004] Although the vibration motor has an overload protection function, it only relies on the method of cutting off the mains to protect, which cannot effectively protect the internal structure of the motor (such as the shaft and eccentric load block), because when the mains are cut off, the internal shaft and load block will continue to rotate under the action of inertia, causing problems such as bearing dry friction and eccentric block connector fatigue, and cannot form comprehensive and effective overload protection for the vibration motor.

[0005] Therefore, the application provides a vibration motor with overload protection to overcome the shortcomings of the prior art. SUMMARY

[0006] In view of the defects of the prior art, the application provides a vibration motor with overload protection, which can effectively solve the technical problems proposed in the background art.

[0007] To achieve the above purpose, the application is implemented by the following technical solutions:

[0008] The application discloses a vibration motor with overload protection, which comprises a main body, end covers installed at both ends of the main body, an integrated controller installed at the top of the main body, a stator shaft rotatably arranged in the center of the main body, eccentric blocks connected to both ends of the stator shaft, and an overload detection device arranged on the integrated controller.

[0009] The brake damage prevention mechanism is arranged at the center of the inner side of the end cover, and comprises an embedded ring body arranged at the center of the inner side of the end cover, and a positioning plate symmetrically arranged on the end face of the embedded ring body close to the stator rotating shaft. The bottom of the positioning plate is provided with a through hole, and a limiting column is arranged in the through hole. The limiting column is movable up and down in the hole, and the bottom of the limiting column is detachably connected with a half ring body. The end of the stator rotating shaft is detachably connected with a circular ring body corresponding to the half ring body. A magnetic sheet is fixedly installed on the top of the limiting column, and an electromagnet is fixedly installed on the inner wall of the embedded ring body corresponding to the magnetic sheet. A strong spring is connected between the bottom end of the limiting column and the positioning plate.

[0010] The half ring body and the circular ring body are made of heat-resistant and friction-resistant materials, and the inner ring surface of the half ring body and the outer ring surface of the circular ring body are formed with friction working surfaces.

[0011] After the electromagnet is powered off, the limiting column drives the half ring body to move downward and tightly abuts against the outer surface of the circular ring body under the elastic force of the strong spring.

[0012] Preferably, the half ring body and the circular ring body are made of copper-based powder metallurgy materials, and the friction working surfaces are hardened.

[0013] Preferably, the end of the limiting column close to the half ring body is provided with a connecting end, and the half ring body is provided with a connecting hole corresponding to the connecting end.

[0014] Preferably, the side of the circular ring body away from the stator rotating shaft is provided with a plurality of annularly distributed extension hole plates, each of which is provided with a fastener, and the end face of the stator rotating shaft is provided with an inner groove corresponding to the shape of the extension hole plate, and the end of the stator rotating shaft is provided with an inner threaded hole corresponding to each fastener.

[0015] As preferred, the matching linkage structure is arranged on the inner embedding ring body and the positioning plate, which comprises a pressing plate slidingly arranged on the side of the positioning plate away from the inner embedding ring body, a telescopic air bag fixedly arranged at the bottom of the positioning plate and below the pressing plate, a gas guide pipe communicatively arranged at one side of the bottom of the telescopic air bag, an air inlet hole provided at the bottom of the gas guide pipe and provided with a one-way valve, an arc-shaped cavity tube fixedly arranged on the inner ring surface of the inner embedding ring body and close to the side of the gas guide pipe, the end of the gas guide pipe and the arc-shaped cavity tube being communicatively arranged, a strong magnetic sheet slidingly arranged in the arc-shaped cavity tube and initially located at the side close to the gas guide pipe, a set-hole ring piece rotatably arranged in the center of the inner embedding ring body, the arc center of the arc-shaped cavity tube and the center of the set-hole ring piece being located at the same position, the set-hole ring piece being provided with a plurality of first sector holes arranged in a ring shape, the set-hole ring piece being provided with a plurality of magnet sheets at the tracks corresponding to the arc motion of the strong magnetic sheet, the strong magnetic sheet and the magnet sheet being mutually adsorbed, the end surface of the inner embedding ring body being provided with a second sector hole corresponding to the first sector hole, and the end surface of the end cover being provided with a third sector hole corresponding to the second sector hole.

[0016] As preferred, the side of the positioning plate away from the inner embedding ring body is provided with a side wall groove for the up-down sliding of the pressing plate.

[0017] As preferred, the side of the set-hole ring piece close to the inner embedding ring body is attached to the inner surface of the inner embedding ring body, and a sealing ring is arranged at the attached position.

[0018] As preferred, the side of the set-hole ring piece close to the inner embedding ring body is provided with a sliding rail, and the inner embedding ring body is provided with a rail groove for the rotation of the sliding rail.

[0019] As preferred, the third sector hole is clamped with a sector grid, and the sector grid is an arc-shaped plate structure provided with a plurality of strip-shaped holes.

[0020] As preferred, the shaft body monitoring assembly is arranged on the end cover and the positioning plate, which comprises a set-hole hanging plate fixedly connected to the side of the positioning plate close to the stator rotating shaft, the set-hole hanging plate being provided with a circular hole at the bottom, a trigger rod slidingly connected in the circular hole, a limiting spring connected between the outer portion of the trigger rod and the bottom of the set-hole hanging plate, the end of the limiting spring close to the stator rotating shaft being hemispherical, and a gap of ≤1.5 mm being arranged between the hemispherical portion and the stator rotating shaft, a pressure-sensitive switch mounted on the top of the set-hole hanging plate, the top of the limiting spring initially attached to the bottom sensing surface of the pressure-sensitive switch, and an alarm fixedly mounted on the outer portion of the end cover.

[0021] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects:

[0022] The vibration motor with overload protection avoids misjudgment or omission of a single detection mode through real-time monitoring of three parameters of current, temperature and rotating speed, improves the reliability and adaptability of the overload protection, and more importantly, after the vibration motor power-off protection, the electromagnet is synchronously powered off in time, the rigid spring rebound force of the strong spring drives the half ring body to quickly adhere to the circular ring body, compared with the traditional power-off protection structure, the risk of winding burning or eccentric block falling caused by the continuous rotation of the rotating shaft during overload is avoided, and the safety and effectiveness of the vibration motor overload protection are improved;

[0023] And the friction working surface is hardened, so that the friction coefficient is stable during braking, and it is resistant to high temperature and wear, prolonging the service life of the brake mechanism and reducing the maintenance frequency.

[0024] At the same time, the half ring body is threadedly connected with the limiting column through the connecting end, and the circular ring body is fixed with the stator rotating shaft through the extension hole plate and the fastener, so that the replacement can be quickly completed without disassembling the whole machine after the wear of a single component.

[0025] In addition, in the braking process, the gas flow is driven by the compression of the air bag without an additional power source, the heat generated by the braking friction is naturally discharged, the risk of softening of the half ring body material or demagnetization of the electromagnet caused by high temperature is avoided, and the heat accumulation in the machine body is prevented to affect the damage of the elements in the machine body.

[0026] In the non-braking state, the air passage is always closed, effectively preventing external dust and impurities from entering the machine body, thereby ensuring the efficiency of flexible response.

[0027] With an initial gap of 1.5mm, the radial displacement of the rotating shaft can be captured, compared with the traditional vibration sensor, the monitoring blind area caused by the failure of a single sensor is avoided, the user is prompted to check the bearing lubrication or rotor dynamic balance through the alarm, preventive maintenance is realized, and the unplanned downtime is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front perspective view of the present application;

[0029] Figure 2 is another perspective view of the present application;

[0030] Figure 3 is a perspective view of related components in the state of separating the end cover from the main body in the present application;

[0031] Figure 4 is a partial perspective view of related components in the state of partially cutting the end cover in the present application;

[0032] Figure 5 is a partial perspective view of related components at the embedded ring body in the present application;

[0033] Figure 6It is the partial stereogram of the related components in the embedded ring body in the cutting state of the application;

[0034] Figure 7 It is the partial exploded stereogram of the related components in the semi-ring body and the circular ring body of the application;

[0035] Figure 8 It is the partial stereogram of the related components in the cutting state of the arc-shaped cavity tube of the application;

[0036] Figure 9 It is the partial exploded stereogram of the related components in the hole ring piece, the embedded ring body and the end cover of the application;

[0037] Figure 10 It is the partial stereogram of the related components in the hole hanging plate of the application.

[0038] Figure 11 It is the partial stereogram of the related components in the hole hanging plate of the application.

[0039] The numbers in the figure respectively represent:

[0040] 1, main body; 11, end cover; 12, integrated controller; 13, stator rotating shaft; 14, eccentric block;

[0041] Brake damage prevention mechanism: 21, embedded ring body; 22, positioning plate; 23, limiting column; 231, connecting end; 232, connecting hole; 24, semi-ring body; 241, circular ring body; 242, extension hole plate; 243, fastener; 244, inner recess; 25, magnetic sheet; 26, electromagnet; 27, strong spring;

[0042] Matching linkage structure: 31, pressing plate; 32, telescopic air bag; 33, air guide pipe; 34, arc-shaped cavity tube; 341, strong magnetic sheet; 35, hole ring piece; 351, sliding rail; 352, rail groove; 36, first fan-shaped hole; 361, second fan-shaped hole; 362, third fan-shaped hole; 363, fan-shaped grid;

[0043] Shaft body monitoring assembly: 41, hole hanging plate; 42, trigger rod; 43, limiting spring; 44, pressure switch; 45, alarm. DETAILED DESCRIPTION

[0044] The application will be further described below in combination with examples.

[0045] Example 1:

[0046] As Figures 1 to 7As shown, a kind of vibration motor with overload protection, including main body 1, end cap 11 installed at both ends of main body 1, integrated controller 12 installed on the top of main body 1, stator rotating shaft 13 rotatably arranged in the center of the inside of main body 1, eccentric block 14 connected to the both ends of stator rotating shaft 13, overload detection device is provided on integrated controller 12;

[0047] Brake protection mechanism is arranged in the center of the inside of end cap 11, including the embedded ring body 21 embedded in the center of the inside of end cap 11, the embedded setting makes the embedded ring body 21 constitute an integrated structure, can be removed with personnel to remove end cap 11, and the embedded setting will not occupy the movement space of stator rotating shaft 13 and eccentric block 14.The end face of embedded ring body 21 close to stator rotating shaft 13 is symmetrically fixed with positioning plate 22, the bottom of positioning plate 22 close to the side of embedded ring body 21 is provided with through hole, limit post 23 is arranged in through hole, limit post 23 can slide up and down in hole, the bottom of limit post 23 is detachably connected with half ring body 24, the end of stator rotating shaft 13 is detachably connected with circular ring body 241, circular ring body 241 corresponds to half ring body 24, magnet piece 25 is fixedly installed on the top of limit post 23, electromagnet 26 is fixedly installed on the inner wall of embedded ring body 21 and corresponds to magnet piece 25, strong spring 27 is connected between the bottom end of limit post 23 and positioning plate 22, specifically, during normal operation, electromagnet 26 only needs to maintain 12V / 0.5A low-power energized state to keep half ring body 24 and circular ring body 241 separate, reduce energy consumption and meet the energy-saving design requirements of industrial motor.

[0048] Half ring body 24 and circular ring body 241 are made of heat-resistant and friction-resistant materials, and the inner ring surface of half ring body 24 and the outer ring surface of circular ring body 241 are formed with friction working surfaces;Half ring body 24 and circular ring body 241 are made of copper-based powder metallurgy material, and the friction working surfaces are hardened.

[0049] After electromagnet 26 is powered off, limit post 23 drives half ring body 24 to move down and tightly adhere to the outer surface of circular ring body 241 under the elastic force of strong spring 27.

[0050] Further, the end of limit post 23 close to half ring body 24 is provided with connecting end 231, and half ring body 24 is provided with connecting hole 232 corresponding to connecting end 231, limit post 23 is screw-connected with half ring body 24 through connecting end 231 and connecting hole 232, which not only ensures the stability of connection, but also facilitates the replacement of half ring body 24.

[0051] Further, the plurality of extension hole plates 242 are annularly distributed on the side of the circular ring body 241 away from the stator shaft 13, a fastener 243 is arranged in each extension hole plate 242, the end face of the stator shaft 13 is provided with an inner groove 244 matched with the shape of the extension hole plate 242, and the end of the stator shaft 13 is provided with an inner threaded hole corresponding to each fastener 243, and the circular ring body 241 is threadedly connected with the stator shaft 13 through the extension hole plate 242, the fastener 243, and the inner groove 244, which not only ensures the stability of the connection, but also facilitates the subsequent replacement of the circular ring body 241.

[0052] As a specific implementation, the overload protection function is realized by using the overload detection device and the brake damage prevention mechanism.

[0053] Specifically, the overload detection device is composed of a current sensor, a temperature sensor, a rotation speed sensor, and a control chip. The current sensor is connected in series in the power supply circuit of the motor to monitor the current in real time when the motor is running. When the current exceeds the preset overload current threshold, it indicates that the motor may be in an overload state. The temperature sensor is installed close to the motor winding to continuously detect the temperature of the motor winding. Once the temperature rises above the upper limit of the normal operating temperature range, it is judged that the motor has an overload heating risk. The rotation speed sensor uses a Hall sensor to obtain the real-time rotation speed of the motor by sensing the magnetic element installed on the stator shaft 13. If the rotation speed is lower than the set proportion of the normal operating speed, it indicates that the motor load is too large and there is a possibility of overload. The control chip is electrically connected with the current sensor, the temperature sensor, and the rotation speed sensor, receives the signals transmitted by the sensors, and analyzes and processes the signals. When the parameter detected by any one of the sensors reaches or exceeds the corresponding overload judgment threshold, the control chip immediately outputs an overload signal.

[0054] When the overload signal output by the control chip is transmitted to the integrated controller 12, the circuit controls the electromagnet 26 to be powered off, the strong spring 27 is driven to move down by the elastic force of the strong spring 27, the half ring body 24 is tightly attached to the outer surface of the circular ring body 241, and the brake is realized by the friction force between the two to avoid damage to the motor due to overload.

[0055] In use: After the vibration motor is started, the stator shaft 13 drives the eccentric blocks 14 at both ends to rotate at high speed to generate vibration. At this time, the overload detection device monitors the motor operating parameters (current, winding temperature, and shaft rotation speed) in real time, and the data is transmitted to the control chip. The control chip judges that the motor is in a normal load state according to the preset threshold (rated current, safe temperature range, and normal speed range), and does not trigger the overload signal.

[0056] When the vibration motor is overloaded, any of the following situations occurs: the current sensor detects that the current exceeds the rated current (1.5 times can be preset); the temperature sensor detects that the winding temperature exceeds (120℃ can be preset); the rotation speed sensor detects that the rotation speed drops to (80% below can be preset) of the normal rotation speed. The control chip immediately determines that it is overloaded and performs the following actions:

[0057] The control chip sends a power-off signal to the integrated controller 12, the electromagnet 26 is powered off and demagnetized, and the attractive force to the magnetic sheet 25 is lost. The strong spring 27 releases the elastic force, pushes the limiting column 23 to move downward, and makes the inner ring surface of the semi-ring body 24 tightly contact the friction working surface of the outer ring surface of the circular ring body 241. The two generate braking resistance through the high friction characteristics of the copper-based powder metallurgy material, quickly reduce the rotation speed of the stator shaft 13, and stop the motor or reduce the load to the safe range.

[0058] When the load returns to normal, the user manually restarts the motor or the integrated controller 12 detects that the parameters return to the threshold, the electromagnet 26 is re-powered, the magnetic sheet 25 is attracted to drive the limiting column 23 to move upward, the semi-ring body 24 is separated from the circular ring body 241, and the motor returns to the normal vibration mode.

[0059] Example two:

[0060] As Figures 8 to 10As shown in the figure, the above-mentioned vibration motor with overload protection further comprises a matching linkage structure arranged on the embedded ring body 21 and the positioning plate 22, which comprises a pressing plate 31 slidably arranged on the side of the positioning plate 22 away from the embedded ring body 21, and the side of the positioning plate 22 away from the embedded ring body 21 is provided with a side wall groove for the up-down sliding of the pressing plate 31. A telescopic air bag 32 is fixedly arranged at the bottom of the positioning plate 22 and directly below the pressing plate 31. One side of the bottom of the telescopic air bag 32 is communicatively provided with a gas guide pipe 33, and the bottom of the gas guide pipe 33 is provided with an air inlet hole, and a one-way valve is mounted on the air inlet hole. Specifically, when the telescopic air bag 32 is compressed, gas is discharged from the gas guide pipe 33, and when the telescopic air bag 32 rebounds, external gas enters its interior through the air inlet hole and the one-way valve. An arc-shaped cavity tube 34 is fixedly installed on the inner ring surface of the embedded ring body 21 and close to one side of the gas guide pipe 33, and the end of the gas guide pipe 33 is communicatively provided with the arc-shaped cavity tube 34. A strong magnetic sheet 341 is slidably arranged in the arc-shaped cavity tube 34, and initially the strong magnetic sheet 341 is located close to one side of the gas guide pipe 33. A hole ring sheet 35 is rotatably arranged in the center of the embedded ring body 21. The side of the hole ring sheet 35 close to the embedded ring body 21 is in close contact with the inner surface of the embedded ring body 21, and a sealing ring is arranged at the close contact position to ensure the sealing of the two sides of the machine body. The side of the hole ring sheet 35 close to the embedded ring body 21 is provided with a sliding rail 351, and the embedded ring body 21 is provided with a rail groove 352 for the rotation of the sliding rail 351, so as to ensure the stability of the rotation of the hole ring sheet 35 on the embedded ring body 21. The arc center of the arc-shaped cavity tube 34 and the center of the hole ring sheet 35 are located at the same position, and the hole ring sheet 35 is provided with a first fan-shaped hole 36 in a ring-shaped distribution. The first fan-shaped hole 36 is provided with at least three, and the hole ring sheet 35 is provided with a magnet sheet on the track corresponding to the arc-shaped motion of the strong magnetic sheet 341. The strong magnetic sheet 341 and the magnet sheet are mutually adsorbed. The end surface of the embedded ring body 21 is provided with a second fan-shaped hole 361 at a position corresponding to the first fan-shaped hole 36. Initially, each second fan-shaped hole 361 is staggered with each first fan-shaped hole 36. The end surface of the end cover 11 is provided with a third fan-shaped hole 362 corresponding to the second fan-shaped hole 361.

[0061] Further, the third fan-shaped hole 362 is clamped with a fan-shaped grid 363, which is an arc-shaped plate body structure provided with a plurality of strip-shaped holes. The third fan-shaped hole 362 prevents external dust and impurities from entering the end cover 11.

[0062] In use: in the above-mentioned embodiment one, the side surface of the limiting column 23 contacts the pressing plate 31 during the downward movement of the limiting column 23, pushes the pressing plate 31 to slide downward along the side wall groove, and extrudes the telescopic air bag 32 at the bottom. After the telescopic air bag 32 is compressed, the internal gas is discharged into the arc-shaped cavity tube 34 through the gas guide pipe 33.

[0063] When the gas enters the arc-shaped cavity tube 34, the strong magnetic sheet 341 is pushed to slide along the arc-shaped track in the direction away from the gas guide tube 33. Since the magnet sheet is arranged at the position corresponding to the motion track of the strong magnetic sheet 341 on the hole ring sheet 35, the strong magnetic sheet 341 and the magnet sheet are mutually adsorbed, thereby driving the hole ring sheet 35 to rotate around the central axis of the embedded ring body 21. When the hole ring sheet 35 rotates to a preset angle, the first sector hole 36 is completely aligned with the second sector hole 361 of the embedded ring body 21 and the third sector hole 362 of the end cover 11, thereby forming a through air passage.

[0064] After the air passage is connected, the heat generated by the overload braking in the motor can be discharged through the third sector hole 362, the second sector hole 361 and the first sector hole 36.

[0065] When the overload is removed and the electromagnet 26 is re-energized, the limiting column 23 moves upward to drive the pressing plate 31 to reset, and the telescopic air bag 32 rebounds and inhales external air through the one-way valve of the gas guide tube 33. At this time, the strong magnetic sheet 341 loses the gas pushing force, and under the adsorption force of the magnet sheet and the limiting action of the inner wall of the arc-shaped cavity tube 34, the strong magnetic sheet 341 returns to the initial position (close to the side of the gas guide tube 33) along the original track, the hole ring sheet 35 is synchronously reversed, the first sector hole 36 is misaligned with the second sector hole 361, and the air passage is closed. The sealing ring of the hole ring sheet 35 and the embedded ring body 21 and the cooperation of the sliding rail 351 and the rail groove 352 ensure the sealing property of the cavity in the closed state, thereby preventing dust and moisture from entering the machine body.

[0066] Example three:

[0067] As shown in Figures 1 to 3 , Figure 11 The vibration motor with overload protection further comprises an axle body monitoring assembly arranged on the end cover 11 and the positioning plate 22, which comprises a hole hanger plate 41 fixedly connected to the positioning plate 22 close to the stator rotating shaft 13. The hole hanger plate 41 has a circular hole at the bottom, and a trigger rod 42 is slidably connected in the circular hole. A limiting spring 43 is connected between the outside of the trigger rod 42 and the bottom of the hole hanger plate 41. The end of the limiting spring 43 close to the stator rotating shaft 13 is hemispherical, and a gap of ≤1.5 mm is arranged between the hemispherical part and the stator rotating shaft 13. A pressure switch 44 is installed at the top of the hole hanger plate 41. Initially, the top of the limiting spring 43 is attached to the bottom sensing surface of the pressure switch 44. An alarm 45 is fixedly installed outside the end cover 11. Specifically, the pressure switch 44 is configured as a pressure sensing switch, and the alarm 45 is configured as an audible and light alarm. When the upward pushing force of the trigger rod 42 is greater than the preset value of the pressure sensing switch, the audible and light alarm is controlled to give a sound and light prompt.

[0068] In use: the shaft monitoring assembly realizes the precise monitoring of the radial deviation of the stator rotating shaft 13 by keeping a preset gap (≤1.5 mm) between the hemispherical end of the limiting spring 43 and the surface of the stator rotating shaft 13. In normal operation, the limiting spring 43 is in a natural elongation state, the top part is in contact with the bottom sensing surface of the pressure switch 44, the pressure switch 44 is not subjected to additional pressure, and is in an initial conduction or signal balance state. While the trigger lever 42 is in a non-contact state with the surface of the stator rotating shaft 13 under the action of the elastic force of the limiting spring 43, and only slightly floats with the slight vibration of the stator rotating shaft 13, without triggering the alarm.

[0069] When the stator rotating shaft 13 deviates abnormally, the trigger logic When the stator rotating shaft 13 deviates radially (deviation>1.5mm) due to overload, bearing wear or assembly error, the surface of the stator rotating shaft 13 is pressed against the hemispherical end of the limiting spring 43, pushing the trigger lever 42 to slide upward along the bottom circular hole of the set hole hanging plate 41, and compressing the limiting spring 43. The upward movement of the trigger lever 42 makes the top of the limiting spring 43 press the pressure switch 44 with a pressure exceeding the preset threshold, and the internal conductive contact of the pressure switch 44 acts to send an abnormal signal to the integrated controller 12. And immediately start the sound and light alarm 45 outside the end cover 11, emit a buzzing sound and a red flashing light.

[0070] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vibration motor with overload protection, comprising a main body (1), end covers (11) installed on both ends of the main body (1), an integrated controller (12) installed on the top of the main body (1), a stator rotating shaft (13) rotatably arranged in the center of the inside of the main body (1), and eccentric blocks (14) connected to both ends of the stator rotating shaft (13), characterized in that, The integrated controller (12) is provided with an overload detection device; The brake damage prevention mechanism is arranged at the center of the inner side of the end cover (11) and comprises an embedded ring body (21) arranged in the center of the inner side of the end cover (11) in an embedded manner, the end face of the embedded ring body (21) near the stator rotating shaft (13) is symmetrically and fixedly provided with a positioning plate (22) upward and downward, the bottom of the positioning plate (22) near the embedded ring body (21) is provided with a through hole, a limiting column (23) is arranged in the through hole, the limiting column (23) can slide upward and downward in the hole, the bottom of the limiting column (23) is detachably connected with a half ring body (24), the end of the stator rotating shaft (13) is detachably connected with a circular ring body (241), the circular ring body (241) corresponds to the half ring body (24) upward and downward, the top of the limiting column (23) is fixedly provided with a magnetic sheet (25), the inner wall of the embedded ring body (21) and the position corresponding to the magnetic sheet (25) are fixedly provided with an electromagnet (26), and the bottom end of the limiting column (23) and the positioning plate (22) are connected with a strong spring (27); The half ring body (24) and the circular ring body (241) are made of heat-resistant and friction-resistant materials, and the inner ring surface of the half ring body (24) and the outer ring surface of the circular ring body (241) are formed with friction working surfaces; After the electromagnet (26) is powered off, under the elastic force of the strong spring (27), the limiting column (23) drives the half ring body (24) to move downward and tightly abuts against the outer surface of the circular ring body (241); The matching linkage structure is arranged on the embedded ring body (21) and the positioning plate (22) and comprises a pressing plate (31) slidably arranged on the side of the positioning plate (22) away from the embedded ring body (21), a telescopic air bag (32) fixedly arranged on the bottom of the positioning plate (22) and located directly below the pressing plate (31), a gas guide pipe (33) communicated on one side of the bottom of the telescopic air bag (32), an air inlet hole provided on the bottom of the gas guide pipe (33) and provided with a one-way valve, an arc-shaped cavity pipe (34) fixedly arranged on the inner ring surface of the embedded ring body (21) and near the side of the gas guide pipe (33), the end of the gas guide pipe (33) and the arc center of the arc-shaped cavity pipe (34) are communicated, a strong magnetic sheet (341) slidably arranged in the arc-shaped cavity pipe (34), the arc center of the arc-shaped cavity pipe (34) and the center of the set hole ring sheet (35) are located at the same position, the set hole ring sheet (35) is provided with a first sector hole (36) arranged in a ring shape, the first sector hole (36) is arranged at least three times, the set hole ring sheet (35) is provided with a magnetic sheet on the track corresponding to the arc-shaped motion of the strong magnetic sheet (341), the strong magnetic sheet (341) and the magnetic sheet are mutually adsorbed, the embedded ring body (21) is provided with a second sector hole (361) on the position corresponding to the first sector hole (36) on the end face, and the second sector hole (361) and the first sector hole (36) are mutually staggered at the beginning, and the end face of the end cover (11) is provided with a third sector hole (362) corresponding to the second sector hole (361). The shaft monitoring assembly is arranged on the end cover (11) and the positioning plate (22), and includes a holed hanging plate (41) fixedly connected to the positioning plate (22) on the side close to the stator rotating shaft (13), the holed hanging plate (41) is provided with a circular hole in the bottom, a trigger rod (42) is slidably connected in the circular hole, a limiting spring (43) is connected between the outer portion of the trigger rod (42) and the bottom of the holed hanging plate (41), the end of the limiting spring (43) close to the stator rotating shaft (13) is semispherical, and a gap of ≤1.5 mm is arranged between the semispherical portion and the stator rotating shaft (13), the holed hanging plate (41) is provided with a pressure-sensitive switch (44) on the top, the top of the limiting spring (43) is attached to the bottom sensing surface of the pressure-sensitive switch (44) at the beginning, and the end cover (11) is provided with an alarm (45) fixedly installed on the outer portion.

2. The vibration motor with overload protection according to claim 1, wherein, The semi-ring body (24) and the circular ring body (241) are both copper-based powder metallurgy materials, and the friction working surfaces are subjected to hardening treatment.

3. The vibration motor with overload protection according to claim 1, wherein, The end of the limiting column (23) close to the semi-ring body (24) is provided with a connecting end (231), and the semi-ring body (24) is provided with a connecting hole (232) corresponding to the connecting end (231).

4. The over-load protected vibration motor of claim 1, wherein, The circular ring body (241) is provided with a plurality of extension hole plates (242) arranged in a ring shape on the side away from the stator rotating shaft (13), each extension hole plate (242) is provided with a fastener (243) penetrating therein, the end surface of the stator rotating shaft (13) is provided with an inner groove (244) matched with the shape of the extension hole plate (242), and the end of the stator rotating shaft (13) is provided with an inner threaded hole corresponding to each fastener (243).

5. The over-charge protected vibration motor of claim 1, wherein, The side wall groove is arranged on the side of the positioning plate (22) away from the embedded ring body (21) and is used for sliding the pressing plate (31) up and down.

6. The over-load protected vibration motor of claim 1, wherein, The holed ring piece (35) is attached to the inner surface of the embedded ring body (21) on the side close to the embedded ring body (21), and a sealing ring is arranged at the attached position.

7. The over-charge protected vibration motor of claim 1, wherein, The holed ring piece (35) is provided with a sliding rail (351) on the side close to the embedded ring body (21), and the embedded ring body (21) is provided with a rail groove (352) for rotating the sliding rail (351).

8. The over-charge protected vibration motor of claim 1, wherein, The third sector hole (362) is provided with a sector-shaped grille (363), and the sector-shaped grille (363) is an arc-shaped plate structure provided with a plurality of strip-shaped holes.

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