Magnetic shoe protective sleeve and direct current motor

Abstract

A magnetic shoe protective sleeve relates to the technical field of self-direct current motors and comprises a protective sleeve body, and an upper positioning sleeve and a lower positioning sleeve which are arranged at two ends of the protective sleeve body in a one-to-one correspondence manner, wherein the upper positioning sleeve and the lower positioning sleeve are assembled in the circumferential direction of the outer wall of the protective sleeve body to form a plurality of mounting positions arranged at intervals, the mounting positions are used for embedding magnetic tiles in a one-to-one correspondence mode, and at least one silencing hole is formed in the position, between at least one adjacent mounting position, of the side wall of the protective sleeve body. The magnetic shoe protective sleeve is arranged in the direct current motor, if impurities enter the space between the rotor and the magnetic shoe protective sleeve in the production process of the direct current motor, the impurities can move between the rotor and the magnetic shoe protective sleeve along with continuous rotation of the rotor in the running process of the direct current motor, and finally the impurities can be discharged from the silencing holes. And the silencing holes can also achieve the effects of reducing noise and dissipating heat.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current motors, in particular to a magnetic tile protective cover and a direct current motor. Background Art

[0002] A DC motor is a rotating motor that can convert DC power into mechanical energy or mechanical energy into DC power. The structure of a DC motor consists of two major parts: the stator and the rotor. The stationary part of a DC motor is called the stator. The main function of the stator is to generate a magnetic field. It consists of a base, main magnetic poles, commutation poles, end covers, bearings, and brush devices. The rotating part of a DC motor is called the rotor. Its main function is to generate electromagnetic torque and induced electromotive force. It is the hub of energy conversion for DC motors, so it is usually called the armature. It consists of a rotating shaft, armature core, armature winding, commutator, and fan.

[0003] Among them, the main magnetic pole is generally composed of multiple magnetic tiles, but since these magnetic tiles are generally ferrite, neodymium iron boron or aluminum nickel cobalt magnets, they are fragile. During the driving of the car or the operation of the machine, it is very easy to cause the magnetic tiles to break due to external impact. Once the resulting magnetic tile debris enters the gap between the rotor and the stator, it will affect the normal operation of the rotor and cause it to get stuck, and even damage the rotor structure and eventually damage the motor. In order to solve the above problems, a DC motor magnetic tile protection device is disclosed in the Chinese utility model patent with authorization announcement number CN205901461U, which effectively isolates the magnetic tile from the rotor by means of a magnetic tile protection cover arranged on the inner side of the magnetic tile. , thereby preventing the magnetic tile debris from contacting the rotor, and effectively protecting the rotor; although the above patent can play a certain protective role on the magnetic tile and the rotor, during the production process of the DC motor, some impurities often enter between the rotor and the magnetic tile protective cover. During the operation of the DC motor, since the magnetic tile protective cover separates the rotor and the magnetic tile, these impurities cannot be discharged from between the rotor and the magnetic tile protective cover, but move between the rotor and the magnetic tile protective cover and collide with them to produce abnormal noise, which will cause damage to the rotor and the magnetic tile protective cover over time, and if you want to remove the impurities, you need to disassemble the DC motor for cleaning, which affects the normal use of the DC motor. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a magnetic tile protective cover and a DC motor, which solves the problem in the prior art that the magnetic tile protective cover cannot quickly discharge impurities.

[0005] A magnetic tile protective cover, comprising:

[0006] A protective sleeve body and an upper positioning sleeve and a lower positioning sleeve which are arranged at two ends thereof in a one-to-one correspondence;

[0007] The upper positioning sleeve and the lower positioning sleeve are assembled along the circumference of the outer wall of the protective sleeve body to form a plurality of installation positions arranged at intervals, and the plurality of installation positions are used to embed the magnetic tiles in a one-to-one correspondence, and at least one silencer hole is opened on the side wall of the protective sleeve body between at least two adjacent installation positions.

[0008] Compared with the prior art, the utility model has the following beneficial effects: when in use, the magnetic tile protection sleeve is inserted into the DC motor. If impurities enter between the rotor and the magnetic tile protection sleeve during the production process of the DC motor, the impurities will be driven to move between the rotor and the magnetic tile protection sleeve as the rotor continues to rotate during the operation of the DC motor. The magnetic and ferrous impurities in the impurities will be discharged from the silencer hole due to their small particle size and adsorbed on the surface of the magnetic tile, while the ordinary impurities in the impurities will enter the silencer hole. Since the ordinary impurities have a large particle size, they will be stuck in the silencer hole, so that the impurities can be removed from between the rotor and the magnetic tile protection sleeve, reducing the damage of the impurities to the rotor and the magnetic tile protection sleeve, and eliminating the abnormal noise caused by the collision of the impurities with the rotor and the magnetic tile protection sleeve, thereby increasing the service life of the DC motor, and there is no need to disassemble the DC motor for cleaning; at the same time, the opening of the silencer hole can also reduce the rotation noise of the DC motor rotor to a certain extent; and the silencer hole is also beneficial to transfer the heat generated during the rotation of the rotor from between the rotor and the magnetic tile protection sleeve to the casing of the DC motor more quickly, thereby accelerating the heat dissipation efficiency.

[0009] Preferably, the muffler hole is a strip hole or a round hole.

[0010] Preferably, there are a plurality of the silencing holes, and the plurality of the silencing holes are linearly arranged or arranged side by side and staggered along the axial direction of the protective cover body.

[0011] Preferably, the upper positioning sleeve and the lower positioning sleeve are both plug-fitted with the protective sleeve body.

[0012] Preferably, a limiting ring is coaxially fixedly installed on the inner wall of the upper positioning sleeve and the lower positioning sleeve at one end away from the protective sleeve body.

[0013] Preferably, a plurality of limit plates are fixedly installed along the circumference of both end surfaces facing each other of the upper and lower positioning sleeves, and a plurality of the mounting positions are formed by assembling a plurality of adjacent limit plates of the upper positioning sleeve and a plurality of adjacent limit plates of the lower positioning sleeve in a one-to-one correspondence.

[0014] Preferably, two positioning grooves are opened on the side wall of the protective cover body, and the two positioning grooves are arranged one-to-one at the two ends of the protective cover body. Positioning blocks are fixedly installed between one of the limit plates and the limit rings on the upper positioning sleeve and the lower positioning sleeve, and the positioning blocks on the upper positioning sleeve and the lower positioning sleeve are corresponding one-to-one and snap-fit ​​with the two positioning grooves.

[0015] Preferably, a plurality of positioning plates are fixedly mounted along the circumference of the end surface of the upper positioning sleeve away from the protective sleeve body.

[0016] Preferably, a V-shaped groove is formed on the side wall of each limiting plate facing the protective cover body along the axial direction of the protective cover body.

[0017] The utility model also provides a DC motor, comprising a motor body and a magnetic shoe protection sleeve arranged inside the motor body.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the DC motor of the utility model.

[0020] Figure 2 for Figure 1 Schematic diagram of the internal structure.

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the central magnetic tile protective cover.

[0022] Figure 4 for Figure 3 Exploded diagram.

[0023] Figure 5 for Figure 4 A schematic structural diagram of the first embodiment of the middle protective cover body.

[0024] Figure 6 for Figure 4 A schematic structural diagram of the second embodiment of the middle protective cover body.

[0025] Figure 7 for Figure 4 A schematic structural diagram of the third embodiment of the middle protective cover body.

[0026] Figure 8 for Figure 4 Top view of the middle and lower positioning sleeves.

[0027] Fig. 9 for Figure 4 Bottom view of the middle upper positioning sleeve.

[0028] The numbers in the figure are: 1, motor body; 2, protective cover body; 21, silencer hole; 22, positioning groove; 3, lower positioning sleeve; 4, upper positioning sleeve; 41, positioning plate; 5, magnetic tile; 6, limit plate; 61, V-shaped groove; 62, positioning block; 7, limit ring. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0030] like Figure 3-4 As shown, an embodiment of the utility model provides a magnetic tile protective cover, comprising: a protective cover body 2 and an upper positioning sleeve 4 and a lower positioning sleeve 3 arranged at both ends thereof in a one-to-one manner; wherein the upper positioning sleeve 4 and the lower positioning sleeve 3 are assembled along the circumferential direction of the outer wall of the protective cover body 2 to form a plurality of installation positions arranged at intervals, and the plurality of the installation positions are used to embed the magnetic tiles 5 in a one-to-one manner, and at least one silencer hole 21 is opened on the side wall of the protective cover body 2 between at least two adjacent installation positions.

[0031] like Figure 5-7 As shown, it can be seen from the other three embodiments of the protective cover body 2 that the silencer hole 21 is a strip hole or a round hole, but the shape of the silencer hole 21 is not limited to the above two types, and it can also be a polygonal hole, an elliptical hole, a special-shaped hole or a spline hole, etc.; and there are several silencer holes 21, and several silencer holes 21 are linearly arranged or arranged side by side and staggered along the axial direction of the protective cover body 2; wherein the more silencer holes 21 there are, the faster the discharge speed of impurities can be ensured, and the silencer holes 21 are arranged in a symmetrical manner, which can also improve the discharge efficiency of impurities and eliminate noise. At the same time, the silencer holes 21 can also transfer the heat generated during the rotation of the rotor from between the rotor and the magnetic tile protective cover to the casing of the DC motor more quickly, thereby accelerating the heat dissipation efficiency.

[0032] like Figure 3-4 as well as Figure 8-9 As shown, according to another embodiment of the utility model, in the magnetic tile protective cover, preferably, the upper positioning cover 4 and the lower positioning cover 3 are both plugged into and matched with the protective cover body 2.

[0033] The upper locating sleeve 4 and the lower locating sleeve 3 have limit rings 7 coaxially fixedly installed on the inner walls of one end away from the protective sleeve body 2 ; the protective sleeve body 2 is restricted between the upper locating sleeve 4 and the lower locating sleeve 3 by the limiting effect of the two limit rings 7 .

[0034] like Figure 3-4 As shown, according to another embodiment of the utility model, in the magnetic tile protection sleeve, a plurality of limit plates 6 are fixedly installed along the circumference on the two end surfaces facing each other of the upper positioning sleeve 4 and the lower positioning sleeve 3, and the plurality of mounting positions are formed by assembling a plurality of adjacent limit plates 6 of the upper positioning sleeve 4 and a plurality of adjacent limit plates 6 of the lower positioning sleeve 3 in a one-to-one correspondence.

[0035] like Figure 4 as well as Figure 8-9As shown, according to another embodiment of the utility model, the magnetic tile protective cover, preferably, has two positioning grooves 22 on the side wall of the protective cover body 2, and the two positioning grooves 22 are arranged one-to-one at the two ends of the protective cover body 2, and a positioning block 62 is fixedly installed between one of the limit plates 6 and the limit ring 7 on the upper positioning sleeve 4 and the lower positioning sleeve 3, and the positioning blocks 62 on the upper positioning sleeve 4 and the lower positioning sleeve 3 are engaged with the two positioning grooves 22 in a one-to-one manner; through the cooperation between the positioning blocks 62 and the positioning grooves 22, during the operation of the DC motor, no relative rotation will occur between the protective cover body 2 and the upper positioning sleeve 4 and the lower positioning sleeve 3.

[0036] like Figure 2-4 As shown, according to another embodiment of the utility model, in the magnetic tile protective cover, preferably, a plurality of positioning plates 41 are fixedly installed along the circumference of the end surface of the upper positioning cover 4 away from the protective cover body 2; the plurality of positioning plates 41 are used for positioning with the brush device of the DC motor.

[0037] like Figure 4 as well as Figure 8-9 As shown, according to another embodiment of the utility model, the magnetic tile protective cover, preferably, each limiting plate 6 is provided with a V-groove 61 on the side wall facing the protective cover body 2 along the axial direction of the protective cover body 2; during the installation process of the protective cover body 2, the V-grooves 61 of the limiting plates 6 on the positioning sleeve and the lower positioning sleeve 3 can provide a certain installation margin for the protective cover body 2, so that the protective cover body 2 can be quickly inserted into the positioning sleeve and the lower positioning sleeve 3.

[0038] like Figure 1-2 As shown, according to another embodiment of the utility model, the magnetic tile protective cover, the utility model also provides a DC motor, including a motor body 1 and a magnetic tile protective cover arranged inside the motor body. After the DC motor is installed with the above-mentioned magnetic tile protective cover, it can protect the magnetic tile 5 while quickly dissipating impurities between the rotor and the magnetic tile protective cover, and can also reduce the operating noise of the DC motor and dissipate the heat generated during the rotation of the rotor.

[0039] The use principle of the utility model is as follows: when the utility model is used, the two ends of the protective cover body 2 are inserted into the upper positioning sleeve 4 and the lower positioning sleeve 3 one by one and abut against the two limit rings 7, and at the same time, the two positioning grooves 22 on the protective cover body 2 are snap-fitted with the two positioning blocks 62 one by one, so as to assemble and form the magnetic tile protective cover as a whole, and then the magnetic tile protective cover as a whole is installed in the motor body 1. When the DC motor is assembled and used, during the operation of the DC motor, if there are impurities between the rotor and the magnetic tile protective cover, as the rotor continues to rotate, the impurities will be driven to move between the rotor and the magnetic tile protective cover. The magnetic and ferrous impurities in the impurities will be discharged from the silencer hole 21 due to their small particle size and adsorbed on the magnetic tile. 5 surface, while ordinary impurities in the impurities will enter the silencer hole 21. Since the ordinary impurities have a large particle size, they will be stuck in the silencer hole 21, so that the impurities can be removed from between the rotor and the magnetic tile protective cover, reducing the damage of the impurities to the rotor and the magnetic tile protective cover, and eliminating the abnormal noise caused by the collision of the impurities with the rotor and the magnetic tile protective cover, thereby increasing the service life of the DC motor, and there is no need to disassemble the DC motor for cleaning; at the same time, the opening of the silencer hole 21 can also reduce the rotation noise of the DC motor rotor to a certain extent; and the silencer hole 21 is also beneficial to more quickly transfer the heat generated during the rotation of the rotor from between the rotor and the magnetic tile protective cover to the housing of the DC motor, thereby accelerating the heat dissipation efficiency.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A magnetic tile protective cover, characterized in that: include: A protective sleeve body (2) and an upper positioning sleeve (4) and a lower positioning sleeve (3) arranged at two ends thereof in a one-to-one correspondence; The upper positioning sleeve (4) and the lower positioning sleeve (3) are assembled along the circumferential direction of the outer wall of the protective sleeve body (2) to form a plurality of installation positions arranged at intervals, and the plurality of installation positions are used to embed the magnetic tiles (5) in a one-to-one correspondence, and at least one silencer hole (21) is opened on the side wall of the protective sleeve body (2) between at least two adjacent installation positions.

2. A magnetic tile protective cover according to claim 1, characterized in that: The muffler hole (21) is a strip-shaped hole or a round hole.

3. The magnetic tile protective cover according to claim 1, characterized in that: There are a plurality of the muffler holes (21), and the plurality of the muffler holes (21) are arranged linearly or in a staggered manner in parallel along the axial direction of the protective sleeve body (2).

4. The magnetic tile protective cover according to claim 1, characterized in that: The upper positioning sleeve (4) and the lower positioning sleeve (3) are both plug-fitted to the protective sleeve body (2).

5. The magnetic tile protective cover according to claim 4, characterized in that: A limiting ring (7) is coaxially fixedly mounted on the inner wall of the upper positioning sleeve (4) and the lower positioning sleeve (3) at one end away from the protective sleeve body (2).

6. A magnetic tile protective cover according to claim 5, characterized in that: A plurality of limit plates (6) are fixedly mounted along the circumference of both end surfaces of the upper positioning sleeve (4) and the lower positioning sleeve (3) facing each other, and the plurality of mounting positions are formed by assembling a plurality of adjacent limit plates (6) of the upper positioning sleeve (4) and a plurality of adjacent limit plates (6) of the lower positioning sleeve (3) in a one-to-one correspondence.

7. The magnetic tile protective cover according to claim 6, characterized in that: Two positioning grooves (22) are provided on the side wall of the protective sleeve body (2), and the two positioning grooves (22) are arranged one by one at the two ends of the protective sleeve body (2). Positioning blocks (62) are fixedly installed between one of the limiting plates (6) and the limiting ring (7) on the upper positioning sleeve (4) and the lower positioning sleeve (3), and the positioning blocks (62) on the upper positioning sleeve (4) and the lower positioning sleeve (3) are corresponding one by one and snap-fit ​​with the two positioning grooves (22).

8. The magnetic tile protective cover according to claim 1, characterized in that: A plurality of positioning plates (41) are fixedly mounted along the circumference of the end surface of the upper positioning sleeve (4) away from the protective sleeve body (2).

9. The magnetic tile protective cover according to claim 6, characterized in that: A V-shaped groove (61) is provided on the side wall of each limiting plate (6) facing the protective cover body (2) along the axial direction of the protective cover body (2).

10. A DC motor, characterized in that: It comprises a motor body (1) and a magnetic shoe protection cover as described in any one of claims 1 to 9 arranged inside the motor body.

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