Micro motor with overload protection

Abstract

The utility model relates to the technical field of motors, in particular to a micro motor with overload protection, which comprises a casing, and an electronic controller is mounted at the top of the outer wall of the casing. The inserting rods penetrate through the supporting plates and the fixing rings, and the tail ends of the inserting rods are matched with the corresponding inserting grooves in an inserted mode. A dust filtering net is arranged at the opening of the fixing ring, and under the action of the dust filtering net, heat dissipation in the motor is facilitated, and foreign matters such as external dust are prevented from entering the motor, so that components in the motor are protected, and stable operation of the motor is ensured; under the cooperation of an inserting rod and an inserting groove, the fixing ring can be conveniently disassembled and assembled, and then the fixing ring can be conveniently taken down to clean the dust filtering net; the electronic controller realizes overload protection by monitoring the current and temperature of the motor, and when the current or temperature exceeds a set value, the controller automatically cuts off a power supply, so that the micro motor is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely is micro motor with overload protection. BACKGROUND

[0002] Micro motor is also called micro motor or micro special motor, micro motor is small and exquisite, and is convenient for using in various compact spaces, overload protection refers to when motor load is higher than rated load, through certain mechanism to protect motor from damage, in micro motor, overload protection is usually realized through electronic controller, electronic controller can monitor motor current and temperature, once motor is overloaded or temperature is too high, power supply is automatically disconnected, thereby protecting motor and other related components, at present, micro motor is widely applied in many fields, and overload protection function is crucial for guaranteeing reliable operation of motor and related equipment.

[0003] The utility model discloses a kind of overload protection devices for direct current brushless motor, the overload protection device for direct current brushless motor includes fixed mechanism, protection mechanism and clamping mechanism, the fixed mechanism includes motor body, four clamping grooves are evenly provided in the side wall middle part of the motor body, the protection mechanism includes overload protector body, the overload protector body bottom end is equipped with placement slot, the clamping mechanism includes four extrusion rods, rubber sleeve is fixedly sleeved in the middle top end of four extrusion rods, the fixed mechanism is movably clamped in the bottom end of protection mechanism, the clamping mechanism is fixedly positioned in the inside of protection mechanism, clamping groove is convenient for fixed clamping rod, placement slot is convenient for placing power cord, extrusion rod is convenient for user to move clamping rod, rubber sleeve is convenient for increasing friction. Through the cooperation of skinning groove and annular blade, the power cord is skinned, then by pulling pull frame along skinning groove and moving to push the power cord skin inside skinning groove to the outside of skinning groove, the skinned power cord is inserted in three plug interfaces, by pressing extrusion block along the second extrusion groove inside, in turn, push extrusion plate along the first extrusion groove inside, so as to be fixed to the power cord in three plug interfaces by extrusion plate, then by tightening fastening bolt, fixed plate is fixed, in turn, the position of extrusion block is fixed, so that the overload protection device for direct current brushless motor can skin power cord, and it is convenient for power cord installation, so as to reduce the working difficulty of staff and in turn improve work efficiency.

[0004] Although the direct current brushless motor with overload protection device is convenient for peeling the power line, the device still has the following problems in actual use: the rear end cover of the motor body is provided with a plurality of heat dissipation holes, but the heat dissipation holes are designed in a hollow manner, which causes foreign matters such as dust from the outside to easily enter the motor from the heat dissipation holes, thereby adversely affecting the stable operation of the motor. Content of the utility model

[0005] The utility model discloses a micro motor with overload protection, which aims at solving the problems in the prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The micro motor with overload protection comprises a shell, and an electronic controller is installed at the top of the outer wall of the shell.

[0008] An end cover is installed at the front end of the shell, the end cover comprises an outer ring body, two symmetrical insertion slots are formed in the inner wall of the outer ring body, a connecting ring is coaxially fixed at the rear end of the outer ring body, and the connecting ring is inserted into the front opening of the shell.

[0009] A fixing ring is installed at the opening of the outer ring body, the rear end of the fixing ring abuts against the front end of the connecting ring, a support plate is fixed in the opening of the fixing ring, and a sliding groove is formed at the rear end surface of the support plate at the upper end and the lower end.

[0010] Two guide rods in sliding connection with the sliding holes are fixed in the inner wall of the sliding groove, and a spring for abutting against the sliding block is arranged outside the guide rod.

[0011] Two insertion rods are fixed at the two end faces away from each other of the two sliding blocks, the insertion rods pass through the support plate and the fixing ring, and the distal end of the insertion rod is inserted into the corresponding insertion slot.

[0012] Preferably, a plurality of connecting blocks are fixed at the front end of the outer wall of the shell, a plurality of ear plates are fixed at the outer wall of the outer ring body, connecting bolts are arranged at the ear plates, and the connecting bolts are in threaded connection with the connecting blocks.

[0013] Preferably, the outer ring body and the connecting ring are in an integral forming structure, and the outer ring body and the connecting ring are both made of alloy aluminum material.

[0014] Preferably, a shaft sleeve is fixed at the center of the rear end surface of the support plate, and a shaft hole penetrating through the support plate is formed in the shaft sleeve.

[0015] Preferably, two connecting grooves are formed in the front end surface of the support plate, and a front end surface of the sliding block is fixed with a lever, which passes through the connecting grooves and is in sliding connection with the connecting grooves.

[0016] Preferably, the cross section of the fixing ring is annular, and the size of the fixing ring is matched with the size of the opening of the outer ring body.

[0017] Preferably, the sliding block and the inserting rod are in integral formation, and the overall shape of the sliding block is rectangular.

[0018] Compared with the prior art, the utility model has the beneficial effects of:

[0019] 1. Through the end cover: on the one hand, the dust filter screen is arranged at the opening of the fixing ring, under the action of the dust filter screen, the heat dissipation inside the motor is facilitated, and the foreign matters such as dust outside are prevented from entering the motor, thereby the internal components of the motor are protected, and the stable operation of the motor is ensured; on the other hand, under the cooperation of the inserting rod and the inserting slot, the fixing ring is conveniently disassembled and assembled, and then the fixing ring is conveniently taken off to clean the dust filter screen and the like, and the filtering effect of the dust filter screen is ensured.

[0020] 2. Through the electronic controller, the overload protection is realized by monitoring the current and temperature of the motor, when the current or temperature exceeds the set value, the controller automatically cuts off the power supply, thereby the micro motor is protected. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall structure schematic view of the utility model;

[0022] Figure 2 It is the structure schematic view of the casing in the utility model;

[0023] Figure 3 It is the structure schematic view of the outer ring body in the utility model;

[0024] Figure 4 It is the structure schematic view of the fixing ring in the utility model;

[0025] Figure 5 It is the structure front view of the fixing ring in the utility model;

[0026] In the drawing:

[0027] 1, casing; 10, electronic controller; 11, connecting block;

[0028] 2, end cover; 20, outer ring body; 200, positioning groove; 201, insertion slot; 21, connecting ring; 22, ear plate; 220, connecting bolt; 23, fixed ring; 230, positioning block; 24, support plate; 240, shaft sleeve; 241, sliding groove; 242, connecting groove; 25, guide rod; 26, spring; 27, sliding block; 270, sliding hole; 271, lever; 28, insertion rod; 29, dust filter screen. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] The embodiment provides a technical solution:

[0031] Please refer to Figures 1-5 As shown in the figure, the miniature motor with overload protection comprises a shell 1, an electronic controller 10 is installed at the top of the outer wall of the shell 1; an end cover 2 is installed at the front end of the shell 1, the end cover 2 comprises an outer ring body 20, two symmetrical insertion slots 201 are formed in the inner wall of the outer ring body 20, a connecting ring 21 is coaxially fixed at the rear end of the outer ring body 20, the connecting ring 21 is inserted into the front opening of the shell 1; a fixed ring 23 is installed at the opening of the outer ring body 20, the rear end of the fixed ring 23 abuts against the front end of the connecting ring 21, a support plate 24 is fixed in the opening of the fixed ring 23, sliding grooves 241 are formed in the rear end surface of the support plate 24 at the upper and lower ends; sliding blocks 27 are slidably installed in the sliding grooves 241, two sliding holes 270 are formed in the opposite end surfaces of the two sliding blocks 27; guide rods 25 which are slidably connected with the sliding holes 270 are fixed in the inner walls of the sliding grooves 241, springs 26 for abutting against the sliding blocks 27 are sleeved on the outer portions of the guide rods 25; insertion rods 28 are fixed on the two end surfaces of the two sliding blocks 27 away from each other, the insertion rods 28 pass through the support plate 24 and the fixed ring 23, the distal ends of the insertion rods 28 are inserted into the corresponding insertion slots 201; dust filter screens 29 are fixed at the two sides of the support plate 24 in the opening of the fixed ring 23.

[0032] In the embodiment, a plurality of connecting blocks 11 are fixed at the front end of the outer wall of the shell 1, a plurality of ear plates 22 are fixed on the outer wall of the outer ring body 20, connecting bolts 220 are threaded through the ear plates 22, and the connecting bolts 220 are threadedly connected with the connecting blocks 11. The design ensures the connection firmness and stability between the shell 1 and the end cover 2, and also has the advantages of easy disassembly and assembly.

[0033] In the embodiment, the outer ring body 20 and the connecting ring 21 are integrally formed, and the outer ring body 20 and the connecting ring 21 are both made of alloy aluminum material. The integrally formed outer ring body 20 and the connecting ring 21 have better connection strength, which ensures the connection stability of the outer ring body 20 and the connecting ring 21. The alloy aluminum material has the advantages of light weight and high strength, which ensures the service life of the outer ring body 20 and the connecting ring 21.

[0034] In the embodiment, the shaft sleeve 240 is fixed at the center of the rear end surface of the support plate 24, and the shaft hole penetrating the support plate 24 is formed in the shaft sleeve 240. The shaft hole and the shaft sleeve 240 facilitate the passage of the rotor end of the motor.

[0035] In the embodiment, the outer wall of the fixed ring 23 is fixed with two symmetrical positioning blocks 230, and two positioning grooves 200 are formed in the inner wall of the opening of the outer ring body 20, and the positioning blocks 230 and the positioning grooves 200 are inserted and matched. The positioning blocks 230 and the positioning grooves 200 increase the installation convenience of the fixed ring 23 and provide positioning effect for accurate installation of the fixed ring 23.

[0036] In the embodiment, the front end surface of the support plate 24 is provided with two connecting grooves 242, and the front end surface of the sliding block 27 is fixed with a lever 271, and the lever 271 penetrates through the connecting grooves 242 and is connected with the connecting grooves 242 in sliding mode. The lever 271 facilitates the horizontal movement of the sliding block 27, and improves the adjustment convenience of the insertion rod 28.

[0037] In the embodiment, the cross section of the fixed ring 23 is annular, and the size of the fixed ring 23 is matched with the size of the opening of the outer ring body 20. This design facilitates the installation of the fixed ring 23 in the opening of the outer ring body 20, and ensures the installation stability of the fixed ring 23.

[0038] In the embodiment, the sliding block 27 and the insertion rod 28 are integrally formed, and the overall shape of the sliding block 27 is rectangular. The integrally formed sliding block 27 and the insertion rod 28 have better connection strength, which ensures the connection stability of the sliding block 27 and the insertion rod 28, and ensures the fixing effect of the insertion rod 28 on the fixed ring 23.

[0039] It can be understood that the electronic controller 10 in the embodiment is a micro computer management center integrating microprocessor, sensor, memory and communication interface and other components. It takes signal data acquisition, calculation processing, analysis and judgment, decision-making as input, and then takes issuing control instructions and commanding actuators to work as output, and sometimes provides stable power supply or reference voltage for the sensor. The electronic controller has high data processing capacity and precise control function, realizes automatic and intelligent control function by collecting and processing input signals and outputting corresponding control signals. When the current exceeds the set overload current value during the operation of the motor, the electronic controller will send a signal to automatically cut off the power supply or adjust the working state of the motor to prevent the motor from overloading. The above is the existing conventional technology, which will not be described here.

[0040] It should be noted that the ends of the support plate 24 are fixedly connected to the opening inner wall of the fixing ring 23 by bolts, and the dust filter screen 29 is fixedly connected to the support plate 24 and the fixing ring 23 by bolts. The bolt fixing mode ensures the connection firmness and stability between the fixing ring 23, the support plate 24 and the dust filter screen 29, and ensures the stable use of the dust filter screen 29.

[0041] In specific use, when foreign matters in the external environment move to the dust filter screen 29 along with the airflow, the dust filter screen 29 intercepts the foreign matters, and the foreign matters cannot enter into the casing 1;

[0042] When the dust filter screen 29 needs to be cleaned, the user first pushes the push rod 271 from the upper side to the middle, and the push rod 271 drives the upper and lower sliding blocks 27 to move to the middle along the sliding grooves 241. At this time, the sliding hole 270 slides along the guide rod 25, the spring 26 is compressed by the sliding block 27, and at the same time, the sliding block 27 drives the insertion rod 28 to disengage from the insertion groove 201. At this time, the user pulls out the fixing ring 23 from the opening of the outer ring body 20, and the fixing ring 23 is taken off, and the dust filter screen 29 can be cleaned.

[0043] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A micromotor with overload protection, characterized in that: It includes a casing (1), the outer wall top of casing (1) is equipped with electronic controller (10); The front end of casing (1) is equipped with end cover (2), end cover (2) includes outer ring body (20), the inner wall of outer ring body (20) is equipped with two symmetrical insertion slot (201), the rear end of outer ring body (20) is coaxially fixed with connecting ring (21), connecting ring (21) is inserted into the front end opening of casing (1); The opening of outer ring body (20) is equipped with fixed ring (23), the rear end of fixed ring (23) is tightly connected with the front end of connecting ring (21), the opening of fixed ring (23) is fixed with support plate (24), the rear end surface of support plate (24) is equipped with sliding slot (241) at the top and bottom; Sliding slot (241) is equipped with sliding block (27), two opposite end surfaces of two sliding blocks (27) are equipped with two sliding holes (270); The inner wall of sliding slot (241) is fixed with two guide rods (25) which are slidably connected with sliding hole (270), the outer part of guide rod (25) is equipped with spring (26) for tightly connecting sliding block (27); Two opposite end surfaces of two sliding blocks (27) are fixed with insertion rod (28), insertion rod (28) passes through support plate (24) and fixed ring (23), the end of insertion rod (28) is inserted into corresponding insertion slot (201). The opening of fixed ring (23) is fixed with dust filter screen (29) at the both sides of support plate (24).

2. The micro motor with overload protection according to claim 1, wherein: The outer wall of casing (1) is fixed with multiple connecting blocks (11), the outer wall of outer ring body (20) is fixed with multiple ear plates (22), connecting bolts (220) are arranged in ear plates (22), and connecting bolts (220) are threadedly connected with connecting blocks (11).

3. The micro-motor with overload protection according to claim 1, wherein: The outer ring body (20) and the connecting ring (21) are an integral structure, and the outer ring body (20) and the connecting ring (21) are both made of alloy aluminum material.

4. The micro-motor with overload protection of claim 1, wherein: The rear end surface of the support plate (24) is fixed with a shaft sleeve (240), and the shaft sleeve (240) is provided with a shaft hole penetrating the support plate (24).

5. The micro-motor with overload protection according to claim 1, wherein: The outer wall of the fixed ring (23) is fixed with two symmetrical positioning blocks (230), and the inner wall of the opening of the outer ring body (20) is provided with two positioning grooves (200), and the positioning blocks (230) are inserted into the positioning grooves (200).

6. The micro-motor with overload protection of claim 1, wherein: The front end surface of the support plate (24) is provided with two connecting grooves (242), and the front end surface of the sliding block (27) is fixed with a lever (271), and the lever (271) passes through the connecting grooves (242) and is slidably connected with the connecting grooves (242).

7. The micro-motor with overload protection of claim 1, wherein: The cross section of the fixed ring (23) is annular, and the size of the fixed ring (23) is matched with the size of the opening of the outer ring body (20).

8. The micro-motor with overload protection of claim 1, wherein: The sliding block (27) and the insertion rod (28) are an integral structure, and the overall shape of the sliding block (27) is rectangular.

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