WO2017117773A1

WO2017117773A1 - Motor end cap assembly, and motor having same

Info

Publication number: WO2017117773A1
Application number: PCT/CN2016/070373
Authority: WO
Inventors: 李明良; 廖海宁
Original assignee: 捷和电机制品(深圳)有限公司
Priority date: 2016-01-07
Filing date: 2016-01-07
Publication date: 2017-07-13

Abstract

A motor end cap assembly comprises a plastic cap (100) for mounting on a housing of a motor. The plastic cap (100) is formed with a vibration-absorbing structure configured to eliminate or reduce vibration. A motor (200) comprises a housing (210), a core (220), a connection terminal (230) electrically connected to the core (220), and the motor end cap assembly. The plastic cap (100) of the motor end cap assembly is mounted on the housing (210). The core (220) comprises a main shaft (221) used to transfer power to an external environment. The main shaft (221) and the connection terminal (230) extend out of the plastic cap (100) from an interior of the housing (210).

Description

Motor end cap assembly and motor having the same

[0001] The present invention relates to the field of electrical machines, and more particularly to a motor end cap assembly having a shock absorbing structure and a motor having the motor end cap assembly.

Background technique

[0002] How to eliminate or reduce the vibration and noise generated by the motor during operation has always been one of the important research topics in the field of motors. According to related research, the vibration generated by most motors is mainly transmitted to the motor casing through a sealant cover provided at the end of the motor casing. Figure 1 is a schematic illustration of the main propagation path of the vibration generated by the motor. As shown in Fig. 1, the existing motor is running, and its vibration is mainly caused by mechanical friction and arc friction between the brush A and the commutator B; the main transmission path of the vibrations is as shown in the figure V 1 and V 2 are transmitted to the rubber cover D through the two brush holders C, and then transferred from the rubber cover D to the outer casing E of the motor. Obviously, in the above-mentioned vibration transmission path, the contact area between the rubber cover D and the outer casing E is large, and the transmission efficiency of the vibration between the rubber cover D and the outer casing E is high; in addition, since the outer casing E is generally close to closed The cylindrical shape is easy to produce a sound amplification effect, and the vibration is transmitted to the outer casing E to cause a large noise. It can be seen that if the vibration can be effectively prevented from being transmitted from the rubber cover D to the outer casing E, the vibration and noise caused by the external environment of the motor can be clearly eliminated or reduced.

technical problem

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor end cap assembly having a shock absorbing structure that can effectively eliminate or mitigate vibration and noise caused by a motor to an external environment.

Another object of the present invention is to provide a motor having the motor end cap assembly described above.

Problem solution

Technical solution

[0005] The present invention provides a motor end cap assembly. In a preferred embodiment of the present invention, the motor end cap assembly includes a rubber cover for mounting on a casing of the motor, and the rubber cover is formed thereon. There are shock absorbing structures for eliminating or mitigating vibration.

[0006] Preferably, the rubber cover includes a substantially cylindrical side wall and an end wall disposed at one end of the side wall, The shock absorbing structure includes a shock absorbing layer made of a resilient insulating material, the shock absorbing layer being formed on an outer surface of the side wall and a portion of an outer surface of the end wall.

[0007] Preferably, an inner surface of the end wall is provided with a clamping groove for clamping a connection terminal of the motor, and the damping layer is further formed on an inner wall of the clamping groove.

[0008] Preferably, the shock absorbing structure includes a shock absorbing layer made of a resilient insulating material, and the shock absorbing layer is formed on a portion of the rubber cover for contacting the casing and On the part that is in contact with the outer end cap of the motor.

[0009] Preferably, the shock absorbing layer is further formed on a portion of the rubber cover for contacting the connection terminal of the motor

[0010] Preferably, the elastic insulating material is any one of rubber, ethylene-vinyl acetate copolymer (EVA), polyethylene (PE), polyurethane (PU), and polypropylene plastic foaming material (EPP). Kind or more.

[0011] Preferably, the elastic insulating material also has viscosity.

[0012] The present invention further provides a motor. In a preferred embodiment of the present invention, the motor includes a casing, a movement, and a connection terminal electrically connected to the movement, and further includes the motor end. a cover assembly; the cover of the motor end cover assembly is mounted on the casing, the movement includes a main shaft for transmitting power to the outside, the main shaft and the connecting terminal are from the casing Wear the rubber cover.

[0013] Preferably, the shock absorbing layer is disposed on a portion of the rubber cover that is in contact with the casing.

[0014] Preferably, a part of the connection terminal is fixed on the rubber cover, and the shock absorbing layer is further disposed on a portion of the rubber cover that is in contact with the connection terminal.

[0015] Preferably, the motor further includes an outer end cover made of metal, the outer end cover is mounted on a surface of the rubber cover facing the outer surface of the casing, and the shock absorbing layer is further disposed at the The portion of the rubber cover that is in contact with the outer end cap.

Advantageous effects of the invention

Beneficial effect

[0016] In the motor end cover assembly and the motor provided by the present invention, the motor end cover assembly (ie, the rubber cover) is covered with a shock absorbing layer on a contact portion thereof with the casing, the metal cover, and the motor terminal. The motor equipped with the motor end cover assembly is operated, and the shock absorbing layer can effectively absorb the vibration from the rubber cover and prevent vibration transmission. Handed to the case, metal cover and terminals to significantly eliminate or mitigate the vibration and noise caused by the motor to the outside environment. In addition, the material of the shock absorbing layer is low in price, the forming method is simple and easy, and the manufacturing cost of the motor is not significantly increased, and the utility model has high practical value.

Brief description of the drawing

DRAWINGS

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. among them:

1 is a schematic view showing a main propagation path of a vibration generated by a conventional motor during operation;

2 is a schematic structural view of a motor end cap assembly according to a preferred embodiment of the present invention;

3 is a schematic structural view of the rubber cover shown in FIG. 2 at another viewing angle; [0020] FIG.

4 is a schematic cross-sectional view taken along line IV-IV of FIG. 2; [0021] FIG.

[0022] FIG. 5 is a schematic cross-sectional view of a portion of a motor provided by a preferred embodiment of the present invention.

Embodiments of the invention

[0023] The present invention provides a motor end cap assembly having a shock absorbing structure that effectively eliminates or mitigates vibration and noise caused by the motor to the external environment.

[0024] According to a preferred embodiment of the present invention, the motor end cap assembly includes at least a rubber cover 100 provided with a shock absorbing structure. Referring to FIG. 2 and FIG. 3, the rubber cover 100 may be made of an insulating material such as plastic or rubber, and has a substantially cylindrical shape with one end completely closed and one end partially closed, and has a substantially cylindrical side. At one end of the wall 101, the side wall 101 is provided with a substantially circular end wall 102. The end wall 102 is disposed coaxially with the side wall 101, partially closing one end of the side wall 101. The central bore of the end wall 102 is provided with a spindle bore 103 for passage through the main shaft of the assembled motor 吋 power supply.

[0025] The outer end surface of the end wall 102 (ie, the surface facing the outer side of the rubber cover 100) is convexly provided with an outer end cap fixing post 11, a terminal fixing portion 12, and an interface mounting portion 13. In the present embodiment, the number of the outer end cap fixing post 11, the terminal fixing portion 12, and the interface mounting portion 13 are both two. The two outer end cap fixing posts 11 are disposed symmetrically about the center of the end wall 102 (not shown), and the axial direction of the outer end cap fixing post 11 is parallel to the axial direction of the side wall 101. The two terminal fixing portions 12 are also disposed symmetrically with respect to the center of the center of the end wall 102, and the two terminal fixing portions 12 are respectively disposed at positions adjacent to the two outer end cap fixing posts 11. The terminal fixing portion 12 is substantially in the shape of a rectangular parallelepiped bump, wherein the portion is provided with a straight strip-shaped terminal insertion hole 121, and the terminal insertion hole 12 1 The end wall 102 is penetrated. The two interface mounting portions 13 are also symmetrically disposed about the center of the center of the end wall 102, and the distance between each of the interface mounting portions 13 and the two terminal fixing portions 12 is equal, that is, the two interface mounting portions 13 and The two terminal fixing portions 12 are equally spaced on the circumference of the outer edge of the end wall 102. Each of the interface mounting portions 13 is substantially rectangular in shape, and the opening thereof faces the outer side of the rubber cover 100 in both the axial direction and the radial direction of the rubber cover 100. Specifically, referring to FIG. 3, a clamping groove 130 is disposed on an inner surface of the end wall 102 (ie, a surface facing the inner side of the rubber cover 100, opposite to the outer surface of the end wall 102), and the clamping groove 1 is provided. The number of 30 corresponds to the interface mounting portion 13, which is also two in the present embodiment. Each of the clamping slots 130 is aligned with an interface mounting portion 13 via the end wall 102, and can pass through the end wall 102 at the interface. A corresponding cornice is formed in the mounting portion 13. Each of the clamping slots 130 includes an outer clamping wall 131 and an inner clamping wall 132 that are disposed in parallel and are adjacent to each other. In the present embodiment, the outer clamping wall 131 is a flat portion formed on the inner surface of the side wall 101, and the inner clamping wall 132 is a flat plate that is vertically protruded from the inner surface of the end wall 102. It can be understood that, in other embodiments, the number, specific structure, and arrangement of the outer end cap fixing post 11, the terminal fixing portion 12, the interface mounting portion 13, and the clamping groove 130 can be determined according to the specific model of the motor and the working environment. Specific requirements are adjusted.

As the most important improvement in the present embodiment, a shock absorbing structure is provided on the rubber cover 100. The shock absorbing structure includes a shock absorbing layer 19, and the shock absorbing layer 19 may be made of an elastic insulating material, such as rubber (such as natural rubber, neoprene, silicone rubber, etc.). Etc.), ethylene-vinyl acetate copolymer (EVA), polyethylene (PE), polyurethane (PU), polypropylene plastic foam (EPP), etc. The elastic insulating material may be fixed to the surface of the cover 100 by a plurality of means such as bonding, injection molding, ultrasonic welding or the like to form the shock absorbing layer 19. The shock absorbing layer 19 composed of a flexible insulating material may be formed into a plurality of specific structural forms according to requirements of a specific application environment, and may be, for example, a dense layered structure or a porous structure or other loose structure such as foam. , non-woven fabric, velvet paper, composite pearl cotton, etc., as long as it can absorb shock.

[0027] In particular, in the present embodiment, the material of the shock absorbing layer 19 is preferably an insulating material having elasticity and viscosity, such as white industrial silica gel. White industrial silica gel not only has good elastic properties, but also absorbs vibration and noise effectively, but also has sufficient viscosity. As long as the white industrial silica gel is directly coated on the rubber cover 100, it can be firmly adhered to the rubber cover 100 by its own viscosity to form the shock absorbing layer 19, without using other fixing and connecting means, and the shock absorbing structure thus formed Layer 19 can also be used to Other components are bonded to the rubber cover 100.

[0028] In the present embodiment, the specific position of the shock absorbing layer 19 on the rubber cover 100 is the outer surface of the side wall 101, and the outer surface of the end wall 101 except the outer end cover fixing column 11 The terminal fixing portion 12, all the portions other than the interface mounting portion 13, and the opposite side walls of each of the holding grooves 130, that is, the surfaces of the outer holding wall 13 1 and the inner holding wall 132 facing each other. Please refer to FIG. 4, which is a schematic view of a cross section taken along line IV-IV in FIG. 2, wherein the hatched portion is a schematic view of a section of the shock absorbing layer 19, and these hatched portions can be clearly shown. The shock absorbing layers 19 are respectively formed on the outer surface of the side wall 101, the partial outer surface of the end wall 101, and the surfaces of the outer and inner holding walls 131 and 132 facing each other. In addition, referring to FIG. 4 alone, since the surface area of the outer clamping wall 131 and the inner clamping wall 132 is small, in order to increase the adhesion of the shock absorbing layer 19 provided on the outer clamping wall 131 and the inner clamping wall 132, prevention is prevented. In the present embodiment, the outer clamping wall 131 and the inner clamping wall 132 are partially recessed on the surfaces of the outer clamping wall 131 and the inner clamping wall 132 respectively to form the receiving grooves 133 and 134, and the shock absorbing layer 19 is disposed on the outer clamping wall 131. The damper layer 19 disposed on the inner clamping wall 132 is embedded in the accommodating groove 134, which is advantageous for improving the reduction on the outer clamping wall 131 and the inner clamping wall 132. The adhesion of the seismic layer 19.

The present invention also provides an electric motor using the above-described motor end cap assembly provided by the present invention to effectively mitigate vibration and noise during operation of the motor. Referring to FIG. 5, a preferred embodiment of the present invention provides a motor 200 including a housing 210, a movement 220, a connection terminal 230, an outer end cover 250, and the above motor end cover assembly including at least the rubber cover 100 described above. .

[0030] The casing 210 is substantially cylindrical, and the movement 220 is housed in the casing 210. The movement 220 includes a main shaft 221 for outputting power to the outside. In the present embodiment, the movement 220 may be an existing motor movement, so that other parts of the movement 220 need not be labeled or need to be shown except for the main shaft 221, which does not cause the integrity of the technical solution of the present invention. influences. The rubber cover 100 is assembled at one end of the casing 210, and the outer surface of the end wall 102 of the rubber cover 100 faces the exterior of the casing 210. The outer surface of the side wall 101 of the rubber cover 100 is in close contact with the inner surface of the casing 210 or forms an interference fit, and the rubber cover 100 is fixed in the casing 210. The spindle 221 is threaded out of the spindle bore 103 for connection to an external transmission or drive object. In the present embodiment, the number of the connection terminals 230 is two, and the clamping groove 130 and the terminal fixing portion 12 correspond to each other. One end of each connecting terminal 230 is disposed inside the casing 210, and is electrically connected to a circuit portion of the movement 220 such as an electrode; the other end of the connecting terminal 230 is formed into a thin-plate connecting portion 231, and the two connecting terminals 230 are connected. The connecting portion 231 is firstly passed through the two clamping slots 130, and is clamped and fixed by the corresponding clamping slots 130, and then passed through the terminal receptacles 121 of the two terminal fixing portions 12 respectively out of the rubber cover 100. Extending from the outer surface of the end wall 102 for connection to an external power source or other electrical device to provide power or other electrical signals to the motor 200. The interface mounting portion 13 can be used to mount various electrical interfaces required for the motor 200. The outer end cover 250 is mounted on the outer surface of the end wall 102 of the rubber cover 100 and is in close contact with the central portion of the outer surface of the end wall 102 of the rubber cover 100 to provide protection for the softer rubber cover 100, and The same function of dust and water. The outer end cap fixing post 11 can provide an auxiliary function of alignment and fixation for the installation of the outer end cap 250. The center end of the outer end cover 250 is also provided with a spindle hole (not shown), and the main shaft 221 is pierced to the outside through the spindle hole provided by the outer end cover 250. In the present embodiment, the material of the outer end cover 250 is a metal such as iron, and other materials may be used in other embodiments.

[0031] According to the background art portion, in conjunction with the vibration propagation principle described in FIG. 1, during the operation of the motor 200, most of the vibration generated by the movement 220 including the main shaft 221 must be transmitted to the casing 210 through the rubber cover 100. In order to have an impact on the outside world. However, in the present embodiment, the portion where the rubber cover 100 and the casing 210 are in contact is the outer surface of the side wall ₁₀₁ , which portion is completely covered by the shock absorbing layer 19. Based on the cushioning and damping effect of the shock absorbing layer 19, most of the vibration transmitted from the rubber cover 100 to the casing 210 is absorbed and eliminated by the shock absorbing layer 19, thereby effectively preventing the casing 210 from being shaken. In addition, based on the same damping principle, the shock absorbing layer 19 covering the outer side surface of the end wall 102 of the rubber cover 100 can eliminate most of the vibration transmitted from the rubber cover 100 to the outer end cover 250, and is disposed at the clamping. The inner side wall of the groove 130, that is, the shock absorbing layer 19 on the surface of the outer holding wall 131 and the inner holding wall 132 opposed to each other can eliminate most of the vibration transmitted from the rubber cover 100 to the connection terminal 230. In this way, most of the vibration generated by the operation of the motor 200 is not transmitted to the outside, and the vibration and noise caused by the motor 200 to the external environment are effectively reduced. In addition, if the shock absorbing layer 19 is made of the aforementioned white industrial silica gel, it can also provide a certain bonding between the rubber cover 100 and the casing 220, the outer end cover 250, and the connecting terminal 230, The effect of the enthalpy further improves the structural stability of the motor 200.

[0032] It can be understood that, in other embodiments, the position at which the shock absorbing layer 19 is formed on the rubber cover 100 is not limited to the above-described portions. However, in order to obtain a better shock absorbing effect, it is preferable to at least ensure that the portion of the cover 100 for contact with the casing 210 is formed with the shock absorbing layer 19; more preferably, it can be used on the rubber cover 100 for the machine The portion where the shell 210 and the connection terminal 230 are in contact form a shock absorbing layer 19, or is used on the rubber cover 100 for And an outer cover portion 250 of the housing 210 is formed in contact with the cushioning layer 19; more preferably, it is possible for the cover ₁₀₀ and the housing 210 in the gum, the outer cover portion 250 and the connection contact terminals 230 are formed Save Seismic layer 19. In addition, the shock absorbing layer 19 may also be formed on the inner wall of the terminal insertion hole 121.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

Claim

[Claim 1] A motor end cap assembly, characterized in that: the motor end cover assembly includes a rubber cover for mounting on a casing of the motor, and the rubber cover is formed with a reduction for eliminating or mitigating vibration Earthquake structure.

[Claim 2] The motor end cap assembly of claim 1, wherein: the rubber cover includes a substantially cylindrical side wall and an end wall disposed at one end of the side wall, the shock absorption The structure includes a shock absorbing layer made of a resilient insulating material, the shock absorbing layer being formed on an outer surface of the side wall and a portion of the outer surface of the end wall.

[Claim 3] The motor end cap assembly according to claim 2, wherein: an inner surface of the end wall is provided with a clamping groove for clamping a connection terminal of the motor, the shock absorbing layer It is also formed on the inner wall of the clamping groove.

[Claim 4] The motor end cap assembly according to claim 1, wherein: the shock absorbing structure includes a shock absorbing layer made of a resilient insulating material, and the shock absorbing layer is formed on the glue A portion of the cover for contacting the casing and a portion for contacting the outer end cover of the motor.

[Claim 5] The motor end cap assembly according to claim 4, wherein: the shock absorbing layer is further formed on a portion of the rubber cover for contacting the connection terminal of the motor.

[Claim 6] The motor end cap assembly according to any one of claims 1 to 5, wherein: the elastic insulating material is rubber, ethylene-vinyl acetate copolymer (EVA), polyethylene ( Any one or more of PE), polyurethane (PU), and polypropylene plastic foam (EPP).

[Claim 7] The motor end cap assembly of any of claims 1-5, wherein: the resilient insulating material is further viscous.

[Claim 8] A motor comprising a casing, a movement, and a connection terminal electrically connected to the movement, wherein: the electric machine further comprises the apparatus according to any one of claims 1-7 a motor end cap assembly; the rubber cover of the motor end cap assembly is mounted on the casing, the movement includes a main shaft for transmitting power to the outside, the main shaft and the connecting terminal from the machine The rubber cover is passed through the casing.

[Claim 9] The motor according to claim 8, wherein: the shock absorbing layer is disposed on the rubber cover On the part that is in contact with the casing.

[Claim 10] The motor according to claim 9, wherein: a part of the connection terminal is fixed to the rubber cover, and the shock absorbing layer is further disposed on the rubber cover and the connection terminal On the part of the contact.

[Claim 11] The motor according to claim 9 or 10, wherein: the motor further comprises an outer end cap made of metal, the outer end cap being mounted on the rubber cover facing the casing On the outer surface, the shock absorbing layer is also disposed on a portion of the rubber cover that is in contact with the outer end cover.