TWI244254B - Dust-proof structure for a sleeve bearing - Google Patents

Abstract

A dust-proof structure for a sleeve bearing comprises an axial tube, a sleeve bearing, and a dust cover. The sleeve bearing and the dust cover are received in the axial tube. The sleeve bearing has an axial hole for inserting a shaft of a rotor. The dust cover is covered on a top of the sleeve bearing to prevent from being polluted by dust. Furthermore, at least one lubricant-circulating channel is defined between the dust cover and the sleeve bearing. Thus, the lubricant can be circulated on an entire surface of the sleeve bearing via the lubricant-circulating channel so as to maintain lubrication between an inner circumference of the sleeve bearing and an outer circumference of the shaft.

Description

1244254 V. Description of the invention (1) • [Technical field to which the invention belongs] The present invention relates to a dust-proof structure of a motor bearing, and in particular to the use of a dust-proof sheet to prevent dust from accumulating in a sleeve bearing with a lubricant fluid, And ensure the structure of the bearing's oil circulation. [Prior art] The combined structure of conventional motor bearings, as shown in Figure 1, the motor is composed of a base 10, a stator 20, and a rotor 30, and the base 10 is combined with a shaft tube 11, the shaft tube 11 can accommodate at least one bearing (s 1 eeve bearing) 12. Thereby, a shaft 31 of the rotor 30 can pass through a shaft hole 120 of the bearing 12, so that the rotor 30 can be rotatably coupled to the base 10. Generally, the lubricant fluid (not shown) of the bearing 12 can be sequentially driven by the inner wall of the shaft hole 1 2 and the top surface of the bearing 12 as the shaft 31 rotates. 2. Everything 1 2 1 on the periphery of the top surface of the bearing 12 flows between the bearing 12 and the shaft tube 11, and then flows back to the part of the bearing 丨 2. Therefore, 'the oil of the bearing 12 can circulate by itself and lubricate the surface of the shaft hole 120' to reduce the friction between the shaft hole 120 and the shaft 31, thereby reducing the rotation noise of the motor and extending the service life of the motor. Although the bearing 12 can reduce the loss of the motor components, it is that when the conventional motor is actually running, the oil of the bearing 12 is easy to fly out of the shaft tube n. Furthermore, the dust in the wire easily enters the shaft tube ", and accumulates on the bearing 12 having the lubricant liquid 'to mix the dust with the oil to form an oil stain 90. Since the oil stain 90 is driven by the oil on the top surface of the bearing 12, it will gradually accumulate at the position of the cut angle 121, causing the oil to circulate smoothly and

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1244254

V. Description of the invention (2) Reenter the bearing 12 and the shaft tube 1 1 again. As a result, the oil stain g0 obstructs the circulation of the oil and causes a lack of lubrication between the shaft hole 120 and the shaft 31, thereby reducing the rotation speed of the rotor 30, generating noise and frictional heat, and even causing the shaft in severe cases. 31 gets stuck, reducing motor life. Another conventional motor bearing combined structure, such as U.S. Patent No. 6, 3 3, 6, 7 4 5 "Oil-Impregnated Bearing and Rotor Shaft

Combination] "and U.S. Patent No. 6, 4 35, 722," Oil-bearing shaft combined with improved structure [Combination Structure for the motor oil bearing cover, the oil pain is often tightly closed, and the return tube lacks lubrication, and the vehicle progresses. i 1-Impregnated Bearing] "invention patent, which reveals-in addition to including a base, a stator, a rotor, a shaft tube and a containment, it is further provided with a gate shape on the top surface of the oil-containing bearing and make the The shaft is fixed between the Π-shaped upper cover and the oil-containing bearing, and a plurality of oil return channels are further opened on the outer ring surface of the oil-containing bearing. When the sub-running, the door-shaped upper cover and the positioning ring can be further used to prevent, exit, the shaft tube, and prevent dust from entering the shaft tube. However, the combined structure of the door cover, the positioning ring, the shaft tube and the oil bearing is too complicated to facilitate the assembly operation. The most important thing is that the lower edge of the door-shaped upper cover is engaged with the peripheral edge of the top surface of the oil-bearing bearing (at the corner), so the oil channel can prevent the oil from entering the oil-bearing bearing and the circulation can be reduced. Efficiency, and cause slippage of the shaft hole and shaft. As a result, the rotation speed is reduced, the production line sound, the stick is stuck, and the service life of the motor is reduced. Therefore, the dustproof structure of the motor bearing is improved. To

1244254 V. Description of the invention (3)-In view of this, the present invention improves the above-mentioned disadvantages, which is to set a bearing and a dustproof sheet in a shaft tube, and form an oil return channel between the bearing and the dustproof sheet. This prevents the dust from entering the bearing, and at the same time, the oil return channel can ensure the smooth circulation of the bearing's lubricating oil. Therefore, the present invention can surely prevent the accumulation of oil stains, reduce rotational friction, reduce rotational noise 'and prolong the service life of the motor. [Summary of the Invention]

The main purpose of the present invention is to provide a dust-proof structure for a motor bearing. A bearing and a dust-proof sheet are arranged in a shaft tube, and at least one oil return channel is formed between the bearing and the dust-proof sheet, so that the present invention can prevent the accumulation of oil pollution. 2. Reduce the friction of rotation, reduce the noise of rotation, and prolong the work of the motor. The dust-proof structure of the motor bearing according to the present invention includes-,-= slrv: rng) and a dust-proof plate. The shaft tube can accommodate "strict 2 dust pieces. 3 bearings-shaft holes can be passed through a rotor-above 'to prevent dust from accumulating on the sleeve. At least one oil return can be formed between the same / dust piece and the bearing In order to prevent failure, the fluid of the bearing circulates and maintains the "slip between the bearing and the shaft"

[Embodiment] The present invention and other objects, features, and advantages can be described in detail, and the preferred embodiment of the present invention will be described in detail. Of construction

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V. Description of the invention (4) Exploded perspective view; FIG. 3 shows the K structure of the motor bearing of the first embodiment of the present invention = wide section: diagram? Fig. 4 discloses a part of Fig. 3 of the present invention: Fig. 5, Fig. 5 shows a dust-proof sheet of the second embodiment of the present invention, reveals the dust-proof structure of the motor bearing of the second embodiment of the present invention & The figure shows a three-dimensional rear view of the dust-proof plate of the third embodiment of the present invention; FIG. 8 shows a partial enlarged view of the dust-proof structure of the motor bearing of the third embodiment of the present invention; FIG. 9 shows the motor of the fourth embodiment of the present invention An exploded perspective view of the dustproof structure of the bearing; FIG. 10 shows a combined sectional view of the dustproof structure of the motor bearing of the fourth embodiment of the present invention; FIG. J shows a combined sectional view of the dustproof structure of the motor bearing of the fifth embodiment of the present invention; And FIG. 12 shows a combined sectional view of a dustproof structure of a motor bearing according to a sixth embodiment of the present invention. Some components of the dust-proof structure of the motor bearing of the present invention are the same as those of the conventional motor bearing of FIG. 1, so the same parts of the two are marked with the same figure ^^, and the structure and function are not described in detail. ′ Please refer to FIGS. 2 and 3. The dust-proof structure of the motor bearing according to the first embodiment of the present invention includes a shaft tube 11, a bearing 12 and a dust-proof sheet 13. The shaft tube 11 is a hollow tube body, which can be fixed to a base 10, and uses a top flange 1 1 1 to latch a certain position 2 0. The bearing 12 is selected from various self-lubricating bearings that can store oil, such as copper bearings made of powder metallurgy, or ceramic bearings made by sintering. The bearing 12 is accommodated in the shaft tube 11, and the bearing 12 is provided with a shaft hole 120 for passing a shaft 31 of a rotor 30. The peripheral edge of the top surface of the bearing 12 usually forms all corners 1 2 1. The dust piece 1 3 is made of plastic or metal

C: \ LOGO-5 \ FIVE CXNriNEKTS \ PK9343.pui Page 9 1244254 V. Description of the invention (5) 夤 made ’It is provided with a shaft hole 131 and at least one return oil passage 132. The shaft 31 can pass through the shaft hole 1 31. The oil return channel 1 3 2 is radially recessed and formed on the bottom surface of the far dust-proof sheet 13. Furthermore, a bottom member 14 and a retaining ring 15 can be provided at the bottom of the shaft tube 11. The top support member 14 has a U-shape, which can support the shaft 31, and can contain lubricant oil. . The retaining ring 15 is used to prevent the shaft 3 1 from disengaging from the bearing 12. Please refer to Figs. 3 and 4, when the base 10, the shaft tube 丨, the bearing 丨 2, the dust sheet 13, the top support 14, the retaining ring 15, the stator 20 and the rotor 3 are assembled into a motor together. 'The dust-proof sheet 1 3 is positioned in the shaft tube 11, and the bottom surface of the dust-proof sheet 13 contacts the top surface of the bearing 12. When the rotor 30 is running, the dust-proof sheet 13 can be used to prevent the oil of the bearing 12 from splashing out of the shaft tube. At the same time, when the dust enters the shaft tube 11, the dust piece 丨 3 can prevent the dust from contacting the bearing 12 and cause dust 9 1 to accumulate on the top surface q of the dust piece 丨 3. The bottom surface is provided with the oil return channel 132, so that when the liquid overflows through the shaft hole 12 of the bearing 12, the oil return channel 32 allows the oil to smoothly pass through the top surface of the bearing 12 and the cut of the periphery. The angle 21 enters the gap between the bearing 12 and the outer wall of the shaft tube Η, so that the oil fluid forms a circulating flow. In this way, the circulating oil can maintain the lubricity of the shaft hole 20 to avoid excessive friction and rotation noise between the shaft hole 120 and the shaft 31, thereby maintaining the accurate speed of the rotor 30 and ensuring Motor life. Please refer to Figs. 5 and 6, which show a dustproof structure of a motor bearing according to a second embodiment of the present invention. Compared with the first embodiment, the dustproof sheet 13 of the second embodiment extends from the shaft hole 131 to form an inner ring flange 133. The inner ring flange 133 can prevent and reduce dust from entering through the shaft hole 131 of the dust plate 13.

1244254 V. Description of the invention (6), and when dust 91 accumulates excessively, the inner ring flange 133 can also be used to prevent dust 91 from entering the shaft hole 131. At the same time, the inner ring flange 133 can be used to prevent the lubricating oil of the bearing 12 from overflowing through the shaft hole 31. Please refer to Figs. 7 and 8, which show the dustproof structure of the horse bearing according to the third embodiment of the present invention. Since the inlet of the oil return channel 132 of the first embodiment is small and unfavorable for the lubricating oil to flow in, the dust-proof sheet 13 of the third embodiment is recessed from the bottom of the shaft hole 1 3 1 to form an oil-conducting area 34. As a result, when the shaft 31 rotates, the oil that overflows from the shaft hole 120 of the bearing 12 may first flow into the oil conducting area 1 34 and make the oil flow into the oil passage 1 smoothly and easily. 3 2. ^ Please refer to Figs. 9 and 10, which show the dustproof structure of a motor bearing according to a fourth embodiment of the present invention. Compared with the first embodiment, the fourth embodiment also includes a shaft tube 11, a bearing 12, and a dust-proof sheet 13, but the bearing 12 forms at least one oil return channel 1 2 2 and the dust-proof sheet 1 3 only A shaft hole j side oil return channel 1 2 2 is provided at least on the top surface of the bearing 丨 2, and it preferably extends to the outer ring surface and the bottom surface of the bearing 12. Therefore, when the dust-proof sheet 丨 3 is assembled on the top surface of the bearing 12, the dust-proof sheet 丨 3 can be used to prevent dust, and the oil return channel 1 2 2 of the bearing j 2 can be used to circulate the lubricant fluid. . Please refer to FIG. 11 for a dustproof structure of a motor bearing according to a fifth embodiment of the present invention. Compared with the first and fourth embodiments, the bearing 12 of the fifth embodiment is provided with only one shaft hole 1 2 0, and the dust piece 丨 3 is provided only with the shaft hole 1 3 1, but the dust piece 13 chooses to tightly fit Or it is integrated into the shaft tube 11 in an integrated manner, so that a proper distance is maintained between the dust-proof plate 丨 3 and the bearing 丨 2 to form an oil return space 16 [oil return channel]. With this, the dust piece 1 3 is also the same as -5 \ FIVE OCKnNEKTS \ PKy343.pid page 11 1244254 Description of the invention (7) Can be used to prevent dust 'and the oil return space between the bearing 丨 2 and the dust piece 丨 3 The same can be used to circulate the lubricant fluid. Referring to Fig. 12, a dustproof structure of a motor bearing according to a sixth embodiment of the present invention is disclosed. Compared with the fifth embodiment, the dust-proof sheet 13 of the sixth embodiment further forms a ring wall 丨 3 5 and an outer ring flange 丨 36. The ring wall 丨 3 5 is formed by the lips of the dust-proof sheet 1 3 It is formed by extending upward, and the outer ring flange 丨 3 6 is formed by the top of the soil wall 135 extending radially outward. Therefore, during assembly, the ring wall 1 3 5 and the outer ring flange 1 3 6 can quickly position the dust sheet 13 to be combined with the top flange of the shaft tube 1 1 and make the dustproof. A predetermined distance is maintained directly between the plate 3 and the bearing i 2 to facilitate the formation of the oil return space 6 [oil return channel], thereby simplifying the assembly and accelerating the formation of the oil return space 6. As described above, compared to the dust-proof structure of the conventional motor bearing in FIG. 1, oil stains 90 are easily formed. The oil stains 90 obstruct the circulation of the lubricating oil and the shortcomings of the oil, and the oil is prone to flying. By providing a dust sheet 13 and forming various oil return spaces between the dust sheet 13 and the bearing ^^, 132, 122, or oil return space 16, it can really prevent the accumulation of oil stains, reduce rotational friction, reduce rotational noise, and prolong Motor life. / Although the present invention has been disclosed in detail by using the foregoing preferred embodiments, it is not intended to limit the present invention, 'any person skilled in the art' can make various changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of this specification shall be determined by the scope of the appended patent application. lambda

1244254 Simple description of drawings [Simplified illustration of drawings] Figure 1: Combination sectional view of the combined structure of conventional motor bearings. Fig. 2: An exploded perspective view of a dustproof structure of a motor bearing according to the first embodiment of the present invention. Fig. 3: A sectional view of the dust-proof structure of the motor bearing according to the first embodiment of the present invention. Figure 4: A partially enlarged view of Figure 3 of the present invention. FIG. 5 is a perspective view of a dust-proof sheet according to a second embodiment of the present invention. Fig. 6 is a partially enlarged view of a dustproof structure of a motor bearing according to a second embodiment of the present invention. Figure 7: A three-dimensional rear view of a dust-proof sheet according to a third embodiment of the present invention. Fig. 8 is a partially enlarged view of a dustproof structure of a motor bearing according to a third embodiment of the present invention. Figure 9: An exploded perspective view of a dustproof structure of a motor bearing according to a fourth embodiment of the present invention. Stomach Fig. 10: A sectional view of a combination of a dustproof structure of a motor bearing according to a fourth embodiment of the present invention. Fig. 11 is a sectional view of a dustproof structure of a motor bearing according to a fifth embodiment of the present invention. Figure 12: A sectional view of a dustproof structure of a motor bearing according to a sixth embodiment of the present invention. Drawing number description: 10 base 11 shaft tube 111 top flange

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Brief description of the drawing 12 Bearing 120 Shaft hole 121 Cut-off angle 122 Oil return channel 13 Dust plate 131 Shaft hole 132 Oil return channel 133 Inner ring flange 134 Oil guide area 135 Ring wall 136 Outer ring flange 14 Top support 15 Retaining ring 16 Oil return space 20 Stator 30 Rotor 31 Shaft 90 Oil stain 91 Dust C: \ LOGO-5 \ FIVE OCKTINENTS \ PK9343.ptd Page 14

Claims (1)

1244254 6. Application patent scope 1. A dustproof structure of a motor bearing, comprising: a shaft tube, which is a hollow tube body; a bearing system, which is contained in the shaft tube and contains oil. A shaft hole is provided for penetrating a shaft of a rotor; 防尘 A dust-proof plate is accommodated in the shaft tube and is set at the # β end of the bearing. The dust-proof plate is provided with a shaft hole for the shaft to pass through It is provided that the prevention can prevent dust from entering the bearing; and that at least one oil return channel is formed between the dust sheet and the bearing '> The oil of the bearing can be circulated to lubricate the shaft hole. Medium 2. According to the dust-proof structure of the motor bearing according to item 1 of the scope of the patent application, the oil return channel is radially recessed and formed on the bottom surface of the dust-proof sheet. 3 According to the dust-proof structure of the motor vehicle according to item 1 of the June patent application, the dust-proof plate is extended upward from the shaft hole to form an inner ring flange. According to the dust-proof structure of the motor bearing according to item 1 of the declared patent scope, the ^ 4 sigma dust-proof sheet is recessed from the edge of the armhole on the bottom surface to form an oil guide. The motor bearing of the item ^ dustproof structure is formed on the top surface of the bearing. The oil bearing of the oil bearing is extended to the wheel bearing of the motor bearing according to item 5 of the patent application scope. The outer and bottom surfaces are according to the motor bearing of the patent application No. 丨, wherein the dust-proof plate is tightly combined in the shaft tube: a gap is maintained between the cymbal plate and the bearing to form the back. The dust structure of the motor bearing of item i of the patent, in which 〇-5 \ FIVE aNriNENrS \ PK9343.ptd Page 15 1244254_ VI. Scope of patent application The dust-proof sheet is integrated into the shaft tube, so that a distance is maintained between the dust-proof sheet and the bearing to form the oil return channel. 9. The dust-proof structure of the motor bearing according to item 1 of the scope of the patent application, wherein the lip of the dust-proof plate extends upward to form a ring wall, and the top of the ring wall extends radially outward to form an outer ring flange, and the ring wall The outer ring flange and the outer ring flange position the dust plate to the shaft tube, and directly maintain a distance between the dust plate and the bearing to form the oil return channel. C: \ LOGO-5 \ FIVE aKTINEKTS \ PK9343.ptd Page 16