TWI509950B - Lubricating circulating structure of motor - Google Patents

Description

Motor lubrication cycle construction

The present invention relates to a motor lubrication cycle configuration, and more particularly to a motor lubrication cycle configuration for providing a bearing of a motor with sufficient lubrication.

The conventional motor that is commonly used in the market is generally the invention patent of the motor of the Republic of China No. I391568. The conventional motor includes a base, and the base is provided with a shaft tube, and the shaft tube is internally provided with a bearing, wherein the bearing The outer portion of the shaft tube is sleeved with a certain subset, and the bearing is pivotally connected to a rotating shaft of the rotor; thereby, the stator group can generate an alternating magnetic field for driving the rotor to rotate. Moreover, the bearings of the conventional motor are generally selected from oil-impregnated bearings, and the motor is also designed with a "lubrication cycle structure" to ensure that the oil-impregnated bearing can effectively store lubricating oil, so that the rotor can be smoothly rotated and can be used. Improve the life of the motor.

Referring to FIG. 1, a conventional motor lubrication cycle structure 8 is disclosed. The conventional motor lubrication cycle structure 8 has a base 81. The base 81 is provided with a shaft tube 811, and the shaft tube 811 is internally provided with a shaft 811. a bearing 82 and a closing member 83, the bearing 82 is pivotally connected to a rotating shaft 84. The outer peripheral surface of the bearing 82 is provided with a plurality of oil guiding grooves 821, whereby the inner portion of the shaft tube 811 can be formed to circulate lubricating oil. In the oil passage, the oil passage is composed of "between the bearing 82 and the shaft tube 811", "between the bearing 82 and the rotating shaft 84", and "the space of the shaft tube 811 closed by the closing member 83", and the rotating shaft 84 is formed. An oil film 85 may be formed between the bearing 82 and the lubricating oil to provide a lubricating function to increase the service life of the motor.

However, since the storage space of the oil passage of the conventional motor lubrication circulation structure 8 is small, when the rotation shaft 84 is assembled to the shaft tube 811, the rotation shaft 84 is easy to be inside the bearing 82. Residual air is squeezed out, and at the same time, a part of the lubricating oil will overflow from the oil path, so it is relatively easy to cause oil leakage and greatly reduce the service life of the motor.

Referring to Figure 2, another conventional motor lubrication cycle configuration is disclosed. The conventional motor lubrication circulation structure 9 also has a base 91. The base 91 is provided with a shaft tube 911. The shaft tube 911 is internally provided with a bearing 92 and a closing member 93. The bearing 92 is provided for a shaft 94. A plurality of oil guiding grooves 921 are provided on the outer circumferential surface of the bearing 92. The other conventional motor lubrication cycle structure 9 is a problem of improving the above-described conventional motor lubrication cycle structure 8, which mainly widens the plurality of oil guiding grooves 921, thereby increasing the storage space of the oil passage, and lubricating oil. It does not fill the entire oil circuit, and the oil path has relatively more air.

However, this other conventional motor lubrication cycle configuration 9 can solve the above It is known that the motor lubrication circulation structure 8 is prone to oil leakage. However, when there is excessive air in the oil passage, it is easy to cause the oil pressure inside the oil passage to be weakened, thereby causing the formation between the rotating shaft 94 and the bearing 92. The oil film 95 is insufficient in strength, and as a result, the oil film 95 cannot provide a better lubricating function of the rotating shaft 94, so that the rotating shaft 94 easily generates excessive contact or friction with the bearing 92 during the rotating process, thereby generating noise.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a motor lubrication cycle configuration that can effectively avoid oil spill situations.

A second object of the present invention is to provide a motor lubrication cycle structure which can effectively maintain the strength of the oil film formed between the rotating shaft and the bearing to prevent the rotating shaft from generating noise during the rotation.

To achieve the foregoing object, the motor lubrication circulation structure of the present invention comprises a base, a bearing, a rotating shaft and a bushing. The base is provided with a shaft tube; the bearing is disposed inside the shaft tube, the bearing is provided with a pivot hole, and the outer peripheral surface of the bearing is provided with at least one oil guiding groove to form a first oil passage; the rotating shaft can Rotatingly coupled to the pivot hole of the bearing, the outer peripheral surface of the shaft Forming a second oil passage with the pivot hole of the bearing, the second oil passage communicating with the first oil passage to form an oil passage; the sleeve is disposed on an inner circumferential surface of the shaft tube and an outer circumference of the bearing Between the faces, the outer peripheral surface of the sleeve is provided with at least one venting groove, and the venting groove communicates with the oil passage.

The bearing has two opposite ends in the axial direction, and the two ends of the bearing are respectively provided with at least one radial oil groove for connecting the first oil passage and the second oil passage.

The sleeve has two opposite ends in the axial direction, and the two ends of the sleeve are respectively provided with at least one notch for communicating the venting groove and the oil passage.

The sum of the cross-sectional areas of the venting grooves of the sleeve in the radial direction is greater than the sum of the cross-sectional areas of the oil guiding grooves of the bearing in the radial direction.

The shaft tube of the base is disposed on one side surface of a substrate portion, and one end of the shaft tube is a closed end, and the other end is an open end, and the closed end faces the substrate portion.

The motor lubrication circulation structure further includes a closing member disposed at the open end of the shaft tube for making the oil passage formed by the first oil passage and the second oil passage a closed oil passage.

The closing member comprises a fastening piece and a fixing block. The rotating shaft extends through the fastening piece. The outer peripheral surface of the rotating shaft is provided with a ring groove corresponding to the fastening piece, and the fixing block is pressed against the fastening piece.

The sleeve is tightly sleeved on the outer circumferential surface of the bearing. The sleeve can be a plastic sleeve or a rubber sleeve.

The bearing has a plurality of oil guiding grooves, and the plurality of oil guiding grooves extend from one end portion to the other end portion of the bearing.

According to the motor lubrication circulation structure, the sleeve can effectively maintain the oil film strength formed between the rotating shaft and the bearing, and the ventilation groove of the sleeve can also serve as a storage place for excess lubricating oil, thereby achieving the use of the lifting motor. Life, and the ability to prevent the shaft from generating noise during the rotation.

〔this invention〕

1‧‧‧Base

11‧‧‧ shaft tube

111‧‧‧closed end

112‧‧‧Open end

12‧‧‧Parts Department

2‧‧‧ bearing

21‧‧‧Pivot hole

22‧‧‧ Oil guide ditch

23‧‧‧ Radial oil groove

3‧‧‧ shaft

31‧‧‧ Ring groove

4‧‧‧ bushings

41‧‧‧Ventilation slot

42‧‧‧ gap

5‧‧‧Closed

51‧‧‧Buckle film

52‧‧‧Fixed blocks

R1‧‧‧ first oil passage

R2‧‧‧Second oil channel

[study]

8‧‧‧Motor lubrication cycle construction

81‧‧‧Base

811‧‧‧ shaft tube

82‧‧‧ bearing

821‧‧‧ oil guide ditch

83‧‧‧Closed

84‧‧‧ shaft

85‧‧‧ oil film

9‧‧‧Motor lubrication cycle construction

91‧‧‧Base

911‧‧‧ shaft tube

92‧‧‧ bearing

921‧‧‧ oil guide ditch

93‧‧‧Closed

94‧‧‧ shaft

95‧‧‧ oil film

Fig. 1 is a cross-sectional view showing a combination of a conventional motor lubrication cycle structure.

Figure 2 is a combined cross-sectional view of another conventional motor lubrication cycle configuration.

Figure 3 is a cross-sectional view showing the assembly of the motor lubrication cycle structure of the present invention.

Fig. 4 is an exploded perspective view showing the bearing and the bushing of the motor lubrication circulation structure of the present invention.

Fig. 5 is a top cross-sectional view showing the motor lubrication cycle structure of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Referring to FIGS. 3 and 4, a motor lubrication cycle structure of a preferred embodiment of the present invention is disclosed. The motor lubrication cycle structure includes a base 1, a bearing 2, a rotating shaft 3, and a bushing 4. The sleeve 4 is sleeved and coupled to the outside of the bearing 2, and is coupled to the base 1, and the shaft 3 is rotatably coupled to the bearing 2.

The base 1 is provided with a shaft tube 11. In the preferred embodiment, the pedestal 1 is disposed on one side surface of a substrate portion 12, and the substrate portion 12 and the shaft tube 11 can be integrally formed by plastic material injection molding, or the shaft The tube 11 can also be a metal shaft tube to be detachably coupled to the substrate portion 12; wherein one end of the shaft tube 11 can be a closed end 111, and the other end can be an open end 112, the closure The end 111 faces the substrate portion 12 so that the lubricating oil can be stored inside the shaft tube 11 and is less likely to be lost.

The bearing 2 is disposed in the shaft tube 11 of the base 1, the bearing 2 is provided with a pivot hole 21, and the outer peripheral surface of the bearing 2 is provided with at least one oil guiding groove 22 to form a first oil passage R1; In the preferred embodiment, the oil guiding grooves 22 are several, and the bearing 2 has opposite ends in the axial direction, and the plurality of oil guiding grooves 22 extend from one end portion to the other end portion of the bearing 2, so that Lubricating oil is easier to circulate and can also increase the storage of lubricating oil.

The rotating shaft 3 is rotatably coupled to the pivot hole 21 of the bearing 2, and the rotating shaft 3 A second oil passage R2 is formed between the outer peripheral surface and the pivot hole 21 of the bearing 2. The second oil passage R2 communicates with the first oil passage R1 to form an oil passage. In the preferred embodiment, the bearing 2, the opposite ends of the axial direction are respectively provided with a plurality of radial oil grooves 23 (only one can be set according to actual needs), the radial oil grooves 23 are for connecting the first oil passage R1 and the second oil passage R2 The lubricating oil can be circulated between the first oil passage R1 and the second oil passage R2 to provide a better circulation flow effect of the lubricating oil.

The sleeve 4 is disposed on an inner circumferential surface of the shaft tube 11 and an outer circumferential surface of the bearing 2 Between the two, the sleeve 4 can be a plastic sleeve or a rubber sleeve for tightly sleeved on the outer circumferential surface of the bearing 2, so that the sleeve 4 and the bearing 2 can be tightly combined and can cover the same. The oil guide groove 22 of the bearing 2 provides a better oil retention effect. Further, the outer circumferential surface of the sleeve 4 is provided with at least one ventilation groove 41, and the ventilation groove 41 communicates with the oil passage to provide lubricating oil with better circulation flow effect in the oil passage; please refer to FIG. 4 In the preferred embodiment, the sleeve 4 has two opposite ends in the axial direction, and the two ends of the sleeve 4 are respectively provided with at least one notch 42 for communicating with the venting groove 41 and the above Oil road.

Moreover, the motor lubrication cycle of the present invention preferably further comprises a closure member 5, the closure member 5 is disposed at the open end 112 of the shaft tube 11 for closing the oil passage, so that the oil passage formed by the first oil passage R1 and the second oil passage R2 is a closed oil passage, thereby providing a better seal In the preferred embodiment, the closure member 5 includes a fastening piece 51 and a fixing block 52. The rotating shaft 3 can extend through the fastening piece 51, and the outer peripheral surface of the rotating shaft 3 is provided with a corresponding buckle. The retaining piece 51 can prevent the rotating shaft 3 from being disengaged from the shaft tube 11 , and the fixing block 52 is pressed against the fastening piece 51 for further fixing the fastening piece 51 to avoid the ring groove 31. The fastening piece 51 is loosened, or the fixing block 52 can also be used to fix the bearing 2.

Referring to FIG. 5, the venting groove 41 of the sleeve 4 is radially Preferably, the sum of the cross-sectional areas is greater than the sum of the cross-sectional areas of the oil guiding grooves 22 of the bearing 2 in the radial direction; thereby lubricating the oil passage (consisting of the first oil passage R1 and the second oil passage R2) When the oil is too much, the venting groove 41 can be used as a preferable storage place for excess lubricating oil, and can further provide an appropriate amount of air to the oil path to ensure better circulating fluidity of the lubricating oil.

The motor lubrication circulation structure of the invention can be applied to various motor structures, the shaft tube The outer peripheral surface of the eleventh can be sleeved with a certain subset, the rotating shaft 3 can be combined with a rotor having a permanent magnet, and the permanent magnet of the rotor and the stator group have an air gap; thereby, the stator group can be permeable after being energized The air gap generates an alternating magnetic field to drive the rotor to rotate. The detailed structural composition and driving manner of the stator and rotor of the motor can be understood by those skilled in the art, and will not be described herein.

By the motor lubrication circulation structure described above, due to the inner circumferential surface of the shaft tube 11 and the The sleeve 4 is disposed between the outer peripheral surfaces of the bearing 2, and the sleeve 4 can be used to block the outer peripheral surface of the bearing 2, so that the oil passage for circulating lubricating oil (from the first oil passage R1 and the The second oil passage R2 is formed inside the sleeve 4 to prevent excessive air in the oil passage, thereby effectively maintaining the oil film strength formed between the rotating shaft 3 and the bearing 2, and further matching the sleeve 4 communicating with the design of the oil passage, when the lubricating oil of the oil passage is excessive, the venting groove 41 can also serve as a storage place for excess lubricating oil to avoid oil leakage, so that the motor lubrication circulation structure can provide the rotating shaft 3 Good lubrication function and ready to supply lubricating oil to the oil circuit to maintain the normal operation of the bearing 2, thereby improving the service life of the motor.

Moreover, the sleeve 4 is designed by the above motor lubrication circulation structure, because the sleeve 4 can be used to block the outer peripheral surface of the bearing 2 such that the oil passage for circulating lubricating oil (consisting of the first oil passage R1 and the second oil passage R2) is formed inside the sleeve 4 Therefore, it is ensured that the filling of the lubricating oil can be preferentially filled between the bearing 2 and the rotating shaft 3 to effectively maintain the oil film strength formed between the rotating shaft 3 and the bearing 2, and the rotating shaft 3 is rotated relative to the bearing 2. In the process, the oil film can fully lubricate the rotating shaft 3, and the rotating shaft 3 is prevented from rotating. During the process, excessive contact or friction is formed with the bearing 2 to prevent the shaft from generating noise during the rotation.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Base

11‧‧‧ shaft tube

111‧‧‧closed end

112‧‧‧Open end

12‧‧‧Parts Department

2‧‧‧ bearing

21‧‧‧Pivot hole

22‧‧‧ Oil guide ditch

23‧‧‧ Radial oil groove

3‧‧‧ shaft

31‧‧‧ Ring groove

4‧‧‧ bushings

41‧‧‧Ventilation slot

42‧‧‧ gap

5‧‧‧Closed

51‧‧‧Buckle film

52‧‧‧Fixed blocks

R1‧‧‧ first oil passage

R2‧‧‧Second oil channel

Claims (11)

A motor lubrication circulation structure comprises: a base provided with a shaft tube; a bearing disposed inside the shaft tube, the bearing is provided with a pivot hole, and the outer peripheral surface of the bearing is provided with at least one oil guiding groove, Forming a first oil passage; a rotating shaft rotatably coupled to the pivot hole of the bearing, a second oil passage is formed between the outer peripheral surface of the rotating shaft and the pivot hole of the bearing, and the second oil passage is connected to the shaft a first oil passage to form an oil passage; and a sleeve disposed between an inner circumferential surface of the shaft tube and an outer circumferential surface of the bearing, the outer circumferential surface of the sleeve being provided with at least one ventilation groove, the ventilation groove communicating with the Oil road. The motor lubrication circulation structure of claim 1, wherein the bearing has opposite ends in the axial direction, and the two ends of the bearing are respectively provided with at least one radial oil groove for connecting the radial oil groove The first oil passage and the second oil passage. The motor lubrication circulation structure of claim 1, wherein the sleeve has opposite ends in the axial direction, and the two ends of the sleeve are respectively provided with at least one notch for communicating the venting groove and the Oil road. The motor lubrication circulation structure of claim 1, wherein the total cross-sectional area of the venting groove of the bushing in the radial direction is greater than the sum of the cross-sectional areas of the oil guiding groove of the bearing in the radial direction. The motor lubrication circulation structure of claim 1, wherein the shaft tube of the base is disposed on one side surface of a substrate portion, and one end of the shaft tube is a closed end, and the other end is opposite An open end that faces the substrate portion. The motor lubrication circulation structure of claim 5, further comprising a closing member disposed at an open end of the shaft tube for forming the first oil passage and the second oil passage The oil circuit is a closed oil circuit. The motor lubrication circulation structure of claim 6, wherein the closure member comprises a fastening piece and a fixing block, and the rotating shaft extends through the fastening piece, and the outer peripheral surface of the rotating shaft is provided with a ring corresponding to the fastening piece. a groove that presses against the fastening piece. The motor lubrication circulation structure of claim 1, 2, 3 or 4, wherein the sleeve is tightly sleeved on an outer circumferential surface of the bearing. The motor lubrication circulation structure of claim 8 is wherein the sleeve is a plastic sleeve. The motor lubrication circulation structure of claim 8, wherein the sleeve is a rubber sleeve. The motor lubrication cycle structure of claim 1, 2, 3 or 4, wherein the bearing has a plurality of oil guiding grooves extending from one end to the other end of the bearing.