CN211481056U - Brushless DC motor capable of prolonging service life - Google Patents

Abstract

The utility model provides a brushless DC motor capable of prolonging the service life, which comprises an outer shell, a bearing, a shaft core, a stator component, a rotor component and a snap ring buckle, wherein the center of the bottom of the outer shell extends upwards to form a hollow shaft sleeve, the stator component can be sleeved and fixed outside the shaft sleeve in a tight-fitting or gluing mode, the rotor component is sleeved and fixed outside the stator component, the bearing is contained in the shaft sleeve in a clearance way, the snap ring buckle is pressed on the top end of the bearing to fix the bearing in the shaft sleeve, the shaft core rotatably passes through the bearing and the snap ring buckle in sequence and is fixedly connected with the rotor component, a closed structure for preventing lubricating oil from being thrown out is formed among the shaft sleeve, the bearing and the snap ring buckle by the pressing of the snap, by the design, the loss of lubricating oil can be reduced, the shaft core can rotate smoothly for a long time, and the service life of the brushless direct current motor capable of prolonging the service life is prolonged.

Description

Brushless DC motor capable of prolonging service life

Technical Field

The utility model belongs to the technical field of brushless DC motor and specifically relates to a brushless DC motor that can increase of service life is related to.

Background

Brushless dc motors are used in a wide variety of applications, such as automotive, tool, industrial control, automation, and aerospace applications. Generally speaking, a brushless dc motor can be divided into three main applications, namely, sustained load application, variable load application and positioning application, and the existing brushless dc motor generally comprises a stator assembly, a rotor assembly, a bearing, a shaft core and other components, after being electrified, the rotor assembly rotates by taking the shaft core as a rotating shaft, however, in practical operation, along with the high-speed rotation of the shaft core, lubricating oil is easy to be thrown out from the bearing, and the loss of the lubricating oil is serious in a long time, so that the operation of the brushless dc motor is not smooth, and the service life is shortened; on the other hand, in the assembly process of the bearing of the conventional brushless direct current motor, in order to ensure that the bonding force between the bearing and the shaft sleeve is strong enough, the bearing and the shaft sleeve are often assembled in an over-tight manner, however, the over-tight assembly manner is easy to extrude the bearing, so that the bearing hole of the bearing is shrunk, the shaft core penetrating through the bearing hole is not smooth in rotation due to the abutting pressure, and the service life of the brushless direct current motor is shortened.

Therefore, it is necessary to provide a brushless dc motor with a prolonged service life to overcome the above-mentioned shortcomings of the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can increase of service life's brushless DC motor, this can increase of service life's brushless DC motor has better preventing to get rid of oily effect, and the axle core can rotate smoothly for a long time to the life of extension complete machine.

For the purpose of the realization, the utility model provides a brushless DC motor that can increase of service life, which comprises an outer shell, a bearing, the axle core, stator module, rotor subassembly and snap ring are detained, the bottom central authorities department of shell body upwards extends and forms hollow axle sleeve, the stator module cover is established outside being fixed in the axle sleeve, the rotor module cover is located outside the stator module, the bearing is the accepting in the axle sleeve in clearance, the snap ring is detained and is supported to press in the top of bearing and be fixed in the axle sleeve with the bearing, the axle core is the pivoted and passes bearing and snap ring in proper order and detain and rotor subassembly fixed connection, borrow the bearing to press by the snap ring and make the axle sleeve, form between bearing and the snap ring buckle and be used for block.

Compared with the prior art, the utility model discloses a brushless DC motor that can increase of service life's bearing's top is detained by a snap ring and is pushed down to make form the enclosed construction that is used for stopping lubricating oil and is thrown away between axle sleeve, bearing and the snap ring knot, work as the utility model discloses a brushless DC motor that can increase of service life is at work, along with the high-speed rotation of axle core, lubricating oil in the bearing moves upwards, because form the enclosed construction between axle sleeve, bearing and the snap ring knot at this moment, therefore the oil in the bearing is difficult to throw away from the bearing, thereby reduces the loss of lubricating oil, plays better prevention and throws away oily effect, and then prolongs brushless DC motor's life; meanwhile, in the assembly process of the bearing of the brushless direct current motor capable of prolonging the service life, the bearing is accommodated in the shaft sleeve in a clearance manner, and the bearing is tightly fixed in the shaft sleeve by means of the abutting of the snap ring and the positioning of the positioning part of the stator on the snap ring; the utility model discloses a brushless DC motor during operation that can increase of service life can play better preventing to get rid of oily effect, can make the axle core rotate smoothly for a long time again, consequently the utility model discloses a brushless DC motor that can increase of service life can reach the efficiency of extension its life.

Specifically, the stator assembly of the present invention comprises a stator and a circuit board electrically connected to the stator, wherein the circuit board is electrically connected to an external dc power supply; specifically, leads may be used to connect the stator to the circuit board.

Specifically, the stator of the utility model is provided with a positioning part protruding into the shaft sleeve, and the snap ring is buckled and pressed between the top end of the bearing and the positioning part; the positioning part can play a positioning role in the snap ring buckle, so that the bearing is tightly fixed in the shaft sleeve.

Specifically, the utility model discloses a lower extreme of axle sleeve is inwards protruding to stretch out the plummer that is used for bearing the weight of the bearing.

Specifically, the utility model discloses a rotor subassembly includes rotor and flabellum, and outside stator module was located to the rotor cover, the flabellum cover was established outside being fixed in the rotor, the flabellum still with axle core fixed connection.

Specifically, the utility model discloses a flabellum is protruding to stretch out the installation department towards the axle sleeve direction, fixed connection in the top embedding installation department of axle core.

Specifically, a wear-resistant and smooth gasket is arranged between the bottom end of the shaft core and the bottom of the shaft sleeve; the gasket can prevent the abrasion of the bottom of the shaft sleeve caused by the high-speed rotation of the shaft core, so that the shaft core can rotate smoothly for a long time.

Specifically, the bearing, the shaft core, the stator assembly, the rotor assembly and the snap ring buckle of the utility model are contained in the outer shell; this setting makes the utility model discloses a brushless DC motor that can increase of service life's compact structure just saves installation space.

Drawings

Fig. 1 is a schematic structural diagram of a brushless dc motor capable of prolonging a service life according to the present invention.

Fig. 2 is a schematic view of an exploded structure of the brushless dc motor of the present invention, which can prolong the service life.

Detailed Description

In order to explain technical contents, structural features, and technical effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the specific embodiments.

Referring to fig. 1 and 2, a brushless dc motor 100 with a prolonged service life of the present invention includes an outer housing 11, a bearing 12, a shaft core 13, a stator assembly 14, a rotor assembly 15, and a snap ring 16, wherein the bearing 12, the shaft core 13, the stator assembly 14, the rotor assembly 15, and the snap ring 16 are all housed inside the outer housing 11, the arrangement makes the brushless dc motor 100 with a prolonged service life compact, and saves installation space, the bottom center of the outer housing 11 extends upward to form a hollow shaft sleeve 111, the stator assembly 14 is fixed on the outer sleeve of the shaft sleeve 111, the rotor assembly 15 is sleeved on the outer sleeve of the stator assembly 14, the bearing 12 is housed inside the shaft sleeve 111, and the bearing 12 and the shaft sleeve 111 are housed in a gap, the housing in the gap can make the bearing 12 not easily be squeezed, and can effectively prevent the bearing hole of the bearing 12 from generating shrinkage, thereby enabling the shaft core 13 passing through the bearing hole to rotate smoothly for a long time; in addition, the utility model discloses a snap ring buckle 16 supports to press in bearing 12's top thereby is fixed in axle sleeve 111 with bearing 12, and axle core 13 is the pivoted and passes bearing 12 and snap ring buckle 16 in proper order and with rotor subassembly 15 fixed connection, because the top of snap ring buckle 16 to bearing 12 supports to press and makes and form the enclosed construction that is used for blockking that lubricating oil is thrown away between axle sleeve 111, bearing 12 and the snap ring buckle 16, works as the utility model discloses a brushless DC motor 100 that can prolong life is at the during operation, along with the high-speed rotation of axle core 13, lubricating oil in the bearing 12 moves upwards, because form the enclosed construction between axle sleeve 111, bearing 12 and the snap ring buckle 16 at this moment, therefore the oil in the bearing 12 is difficult to throw away from bearing 12 to reduce the loss of lubricating oil, play better oil-throwing-proof effect; the utility model discloses a brushless DC motor 100 during operation that can increase of service life can play better preventing to get rid of oily effect, can make axle core 13 rotate smoothly for a long time again, consequently the utility model discloses a brushless DC motor 100 that can increase of service life can reach the efficiency of extension its life.

In order to more clearly illustrate the specific structure of the brushless dc motor 100 with the service life prolonged according to the present invention, please refer to the schematic exploded structure diagram of the brushless dc motor 100 with the service life prolonged in fig. 2, the stator assembly 14 of the present invention is fixed outside the shaft sleeve 111, specifically, the stator assembly 14 includes a stator 141 and a circuit board 142 electrically connected to the stator 141, the stator 141 is fixed outside the shaft sleeve 111, the stator 141 and the shaft sleeve 111 can be fixed together by using the glue 18, and of course, the stator 141 can also be directly fixed outside the shaft sleeve 111 by a tight-fitting manner; more specifically, the stator 141 may be connected to the circuit board 142 by using a lead wire, and the circuit board 142 is used for electrically connecting to an external dc power source, so as to energize the stator 141; with continued reference to fig. 1-2, in particular, the lower end of the shaft sleeve 111 protrudes inward to form a bearing platform 1111 for bearing the bearing 12, and the bearing platform 1111 can provide stable support for the bearing 12; simultaneously in order to prevent the high-speed wearing and tearing of rotatory bottom to axle sleeve 111 of axle core 13 to influence the rotatory smoothness nature of axle core 13, the utility model discloses a be provided with one between the bottom of axle core 13 and axle sleeve 111 and be wear-resisting and glossy gasket 17.

Continuing to refer to fig. 1, the utility model discloses borrow by a snap ring 16 to press in bearing 12's top is fixed in axle sleeve 111 with bearing 12 in, because the high-speed rotation of axle core 13 very easily influences the pressure of snap ring 16 to bearing 12, and then causes lubricating oil to throw away from bearing 12 because of the not hard up of pressing, consequently the utility model discloses a stator 141 has protruding location portion 1411 of stretching into in axle sleeve 111, and snap ring 16 supports to press between bearing 12's top and location portion 1411, and location portion 1411 can play the effect of location to snap ring 16 this moment to make snap ring 16 support tightly to press inside axle sleeve 111 is fixed in with bearing 12's fastening in bearing 12's top.

With continued reference to fig. 1-2, the rotor assembly 15 sleeved outside the stator assembly 14 includes a rotor 151 and fan blades 152, the rotor 151 is sleeved outside the stator assembly 14, the fan blades 152 are sleeved and fixed outside the rotor 151, wherein the fan blades 152 have protruding mounting portions 1521 facing the shaft sleeve 111, specifically, the top end of the shaft core 13 is provided with a groove 131, the groove 131 at the top end of the shaft core 13 is embedded into the mounting portions 1521, so that the fan blades 152 and the shaft core 13 are fixedly connected, when the brushless dc motor 100 capable of prolonging the service life generates a large amount of heat during operation, the rotation of the fan blades 152 can play a role in dissipating heat.

Referring to fig. 2, the brushless dc motor 100 with a prolonged service life is assembled by first placing a wear-resistant and smooth spacer 17 at the bottom of the shaft sleeve 111, installing the bearing 12 inside the shaft sleeve 111, disposing the shaft sleeve 111 and the bearing 12 in a clearance manner, disposing the snap ring 16 at the top end of the bearing 12, and sequentially installing the circuit board 142 and the stator 141 outside the shaft sleeve 111, so that the snap ring 16 is pressed between the top end of the bearing 12 and the positioning portion 1411, wherein the stator 141 and the circuit board 142 are electrically connected by a lead wire, passing the shaft core 13 through the snap ring 16 and the bearing hole of the bearing 12, installing the fan blade 152 outside the rotor 151 in a sleeved manner, and embedding the groove 131 of the shaft core 13 into the installation portion 1521 of the fan blade 152, thereby assembling the brushless dc motor 100 with a prolonged service life as shown in fig. 1.

With reference to fig. 1-2, the top of the bearing 12 of the brushless dc motor 100 with the service life being prolonged is pressed by a snap ring 16, so that a closed structure for blocking the lubricant oil from being thrown away is formed between the shaft sleeve 111, the bearing 12 and the snap ring 16, when the brushless dc motor 100 with the service life being prolonged is in operation, along with the high-speed rotation of the shaft core 13, the lubricant oil in the bearing 12 moves upwards, and at this time, because the closed structure for blocking the lubricant oil from being thrown away is formed between the shaft sleeve 111, the bearing 12 and the snap ring 16, the lubricant oil in the bearing 12 is difficult to be thrown away from the bearing 12, thereby reducing the loss of the lubricant oil, achieving a better oil throwing prevention effect, and further prolonging the service life of the brushless dc motor 100 with the service life being prolonged; meanwhile, in the assembly process of the bearing 12 of the brushless dc motor 100 with the service life prolonged, the bearing 12 is contained in the shaft sleeve 111 in a clearance manner, and the bearing 12 is fixed in the shaft sleeve 111 tightly by means of the abutting of the snap ring 16 and the positioning of the positioning part 1411 of the stator 141 on the snap ring 16, so that the bearing 12 is not easy to be extruded, the bearing hole of the bearing 12 can be effectively prevented from being contracted, the shaft core 13 passing through the bearing hole can rotate smoothly, and the service life of the brushless dc motor 100 with the service life prolonged can be further prolonged; the utility model discloses a brushless DC motor 100 during operation that can increase of service life can play better preventing to get rid of oily effect, can make axle core 13 rotate smoothly for a long time again, consequently the utility model discloses a brushless DC motor 100 that can increase of service life can reach the efficiency of extension its life.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims (8)

1. The utility model provides a brushless DC motor that can increase of service life, its characterized in that detains including shell body, bearing, axle core, stator module, rotor subassembly and snap ring, the bottom central authorities department of shell body upwards extends and forms hollow axle sleeve, the stator module cover is established and is fixed in outside the axle sleeve, the rotor subassembly cover is located outside the stator module, the bearing be the clearance accept in the axle sleeve, the snap ring detain to support press in the top of bearing and will the bearing is fixed in the axle sleeve, the axle core is the pivoted and passes in proper order bearing and snap ring buckle and with rotor subassembly fixed connection borrow by the snap ring is detained right the support of bearing is pressed the messenger form between axle sleeve, bearing and the snap ring and is used for blockking the enclosed construction that lubricating oil was thrown away.

2. The brushless dc motor with extended lifespan as recited in claim 1, wherein the stator assembly comprises a stator and a circuit board electrically connected to the stator, the circuit board being configured to be electrically connected to an external dc power source.

3. The brushless dc motor of claim 2, wherein the stator has a positioning portion protruding into the shaft sleeve, and the snap ring is pressed between the top end of the bearing and the positioning portion.

4. The brushless dc motor of claim 1, wherein the lower end of the sleeve protrudes inward to form a bearing platform for supporting the bearing.

5. The brushless dc motor of claim 1, wherein the rotor assembly comprises a rotor and a fan blade, the rotor is sleeved outside the stator assembly, the fan blade is sleeved and fixed outside the rotor, and the fan blade is further fixedly connected to the shaft core.

6. The brushless dc motor of claim 5, wherein the fan blades protrude from the mounting portion toward the shaft sleeve, and the top end of the shaft core is embedded in the mounting portion and fixedly connected thereto.

7. The brushless dc motor with extended lifespan as set forth in claim 1, wherein a wear-resistant and smooth spacer is disposed between the bottom end of the shaft core and the bottom of the shaft sleeve.

8. The brushless dc electric machine with extended operating life of claim 1, wherein the bearing, shaft core, stator assembly, rotor assembly, and snap ring are housed inside the outer housing.

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