A motor end shield and motor
By designing a channel structure for the bearing sleeve and shaft sleeve on the motor end cover, effective heat dissipation and lubrication oil supply of the bearing are achieved, solving the problems of bearing wear and heat dissipation in small-power motors and ensuring stable motor operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI SCI TECH UNIV
- Filing Date
- 2026-04-10
- Publication Date
- 2026-06-16
AI Technical Summary
The bearings of low-power motors experience accelerated wear in high-temperature environments, and the heat dissipation hole design cannot effectively dissipate heat or replenish oil, leading to unstable motor operation and easy burnout.
Design a motor end cover comprising a bearing sleeve, a shaft sleeve, and a channel structure. Channel one and channel two are used for heat dissipation around and inside the bearing, respectively. The opening and closing of the channels are controlled by an annular cover plate to achieve effective heat dissipation and lubrication oil replenishment of the bearing.
It significantly improves the heat dissipation of the bearing, prevents wear, ensures stable motor operation, and prevents moisture from entering when the motor is at rest, thus extending the motor's lifespan.
Smart Images
Figure CN224367648U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor end cover technology, specifically to a motor end cover. Background Technology
[0002] Currently, most low-power motors have ball bearing housings on their end covers. The bearings are fixed inside the bearing housings. The internal space of low-power motors is small. When the motor is running, the bearings generate heat, which is difficult to dissipate. The temperature rises sharply, which leads to increased bearing wear. In addition, if the bearings are not properly lubricated, wear will also be accelerated, resulting in a large eccentricity when the motor is running, which will eventually burn out the motor.
[0003] Solution CN206922561U discloses a motor end cover, which allows hot air inside the motor to be discharged through a ring of heat dissipation holes on the end cover, thus playing a certain role in heat relief. However, since the heat dissipation holes are located on the periphery of the bearing housing and are far from the bearing, the heat dissipation effect is limited. Moreover, the heat dissipation holes can only be used for ventilation and heat dissipation and cannot be used for lubrication of the bearing, which is a shortcoming. In addition, the heat dissipation holes cannot be closed, and moisture can easily enter when the motor is not in use, which can have a negative impact on the motor. Utility Model Content
[0004] The purpose of this invention is to provide a motor end cover to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0006] This utility model discloses a motor end cover, including an end cover body. The end cover body has a bearing sleeve and a rotating shaft sleeve at its center. The inner diameter of the bearing sleeve is larger than the inner diameter of the rotating shaft sleeve and forms a bearing mounting area. The bearing mounting area is used to install a bearing. The end cover body has several reinforcing ribs on both sides and several fixing ears around its perimeter. The fixing ears have mounting holes. The end cover body, bearing sleeve, rotating shaft sleeve, reinforcing ribs, and fixing ears are fixed together. The bearing sleeve has several channels I that penetrate the rotating shaft sleeve. The rotating shaft sleeve has several channels II that connect the bearing mounting area.
[0007] As an improvement, the inner opening of channel one is located on the inner wall of the bearing sleeve, the inner opening of channel two is located on the inner end face of the rotating shaft sleeve, and corresponds to the radial position of the bearing balls after installation. The outer openings of channel one and channel two are located on the outer end face of the rotating shaft sleeve, and channel one is located on the periphery of channel two.
[0008] As an improvement, the first inner opening and the first outer opening are rectangular strip holes, the length direction of the first inner opening is along the axial direction of the bearing sleeve, and the second inner opening and the second outer opening are circular holes.
[0009] As an improvement, the first channel has 12 channels evenly distributed circumferentially, and the second channel has 6 channels evenly distributed circumferentially.
[0010] As an improvement, the inner part of the outer end of the rotating shaft sleeve is provided with a rotatable annular cover plate. The annular cover plate is provided with several through holes corresponding to channel one and channel two. The annular cover plate is provided with a fixed handle. The handle is located outside the circumference of the rotating shaft sleeve. A ball is provided inside the handle. The ball moves through a spring inside the handle. The ball is nested and engaged with the spherical groove on the circumference of the rotating shaft sleeve.
[0011] As an improvement, the circumferential surface of the rotating bushing is provided with a limiting strip hole, the handle passes through the limiting strip hole and can slide, and the spherical groove is located at the end of the limiting strip hole.
[0012] As an improvement, the circumferential surface of the rotating bushing is provided with two spherical grooves, which are located at the two ends of the limiting strip hole, respectively.
[0013] An electric motor, including an end cap.
[0014] The advantages of this utility model compared with the prior art are as follows: When the motor is working, the first channel 1 allows ventilation and heat dissipation around the bearings, and the second channel 2 allows ventilation and heat dissipation inside the bearings. The channels extend directly to the bearings, which significantly improves the heat dissipation effect. When the motor is stopped, lubricating oil can be injected through the ball bearings of the second channel to replenish and maintain the bearings. The annular cover plate can close the first and second channels to prevent the motor from getting damp. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings listed below are only some structural schematic diagrams of this utility model, and not all of them.
[0016] Figure 1 This is a schematic diagram of the structure of a motor end cover according to this utility model. Figure 1 .
[0017] Figure 2 This is a schematic diagram of the structure of a motor end cover according to this utility model. Figure 2 .
[0018] Figure 3 This is a schematic diagram of the structure of a motor end cover according to this utility model. Figure 3 .
[0019] Figure 4 This is a front view of a motor end cover according to the present invention.
[0020] Figure 5 This is a rear view of a motor end cover according to the present invention.
[0021] Figure 6 This is a cross-sectional view of a motor end cover according to the present invention. Figure 1 .
[0022] Figure 7 This is a cross-sectional view of a motor end cover according to the present invention. Figure 2 .
[0023] Figure 8 This is a schematic diagram of the structure of an annular cover plate for a motor end cover according to this utility model.
[0024] Figure 9 This is a cross-sectional view of the handle of a motor end cover according to this utility model.
[0025] Figure 10 yes Figure 7 Enlarged view of point A in the middle.
[0026] Figure label:
[0027] End cap body 1; reinforcing rib 11; fixing lug 12; mounting hole 121;
[0028] Bearing sleeve 2; Channel 1 21; Inner opening 211; Outer opening 212;
[0029] 3. Rotary shaft sleeve; 31. Channel 2; 311. Outer opening 2; 312. Limiting strip hole; 32. Spherical groove; 33. Sealing ring; 34.
[0030] 4. Annular cover plate; 41. Through hole; 42. Handle; 421. Ball bearing; 422. Spring;
[0031] Bearing installation area 5; bearing 51. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] In the description of the embodiments of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance. The use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be perfectly horizontal, but can be slightly tilted.
[0035] In the description of the embodiments of this utility model, the terms "multiple" or "several" refer to at least two.
[0036] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] This embodiment, in conjunction with the accompanying drawings, provides a detailed description of a motor end cover.
[0038] This embodiment provides a motor end cover, such as... Figure 1 , Figure 3 As shown, the device includes an end cap body 1. The end cap body 1 has a bearing sleeve 2 and a rotating shaft sleeve 3 at its center. The inner diameter of the bearing sleeve 2 is larger than the inner diameter of the rotating shaft sleeve 3, forming a bearing mounting area 5. The bearing mounting area 5 is used to install a bearing 51. The end cap body 1 has several reinforcing ribs 11 on both sides. The end cap body 1 has several fixing ears 12 around its perimeter. The fixing ears 12 have mounting holes 121. The end cap body 1, bearing sleeve 2, rotating shaft sleeve 3, reinforcing ribs 11, and fixing ears 12 are fixed together. This is the existing design.
[0039] like Figure 7As shown, the bearing sleeve 2 is provided with several channels 21, which pass through the rotating shaft sleeve 3. The rotating shaft sleeve 3 is provided with several channels 31, which connect the bearing mounting area 5. The channels 21 and 31 are located inside and can directly act on the bearing 51.
[0040] like Figure 5 , Figure 7 As shown, the inner opening 211 of channel 21 is located on the inner wall of bearing sleeve 2, and the inner opening 311 of channel 31 is located on the inner end face of rotating shaft sleeve 3, corresponding to the radial position of the balls of bearing 51 after installation. The outer opening 212 of channel 21 and the outer opening 312 of channel 31 are located on the outer end face of rotating shaft sleeve 3. Channel 21 is located around channel 31. Channel 21 and channel 31 act on two positions of bearing 51. Channel 21 is for ventilation and heat dissipation, and channel 31 can also be used to add oil to bearing 51 in addition to ventilation and heat dissipation.
[0041] like Figure 5 , Figure 7 As shown, the inner opening 211 and the outer opening 212 are rectangular slots. The length of the inner opening 211 is along the axial direction of the bearing sleeve 2. The rectangular slot is adapted to the thickness of the bearing 51. The inner opening 311 and the outer opening 312 are round holes. The round holes are adapted to the ball spacing width.
[0042] like Figure 4 , Figure 5 As shown, channel 1 21 has 12 channels evenly distributed around the circumference, and channel 2 31 has 6 channels evenly distributed around the circumference.
[0043] like Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, the outer end of the rotating sleeve 3 is provided with a rotatable annular cover plate 4. The annular cover plate 4 is located inside and is not easily damaged. The annular cover plate 4 is provided with several through holes 41 corresponding to the first channel 21 and the second channel 31. The annular cover plate 4 inside the rotating sleeve 3 is provided with sealing rings 34 on both sides. The annular cover plate 4 serves as the switch for the first channel 21 and the second channel 31. The annular cover plate 4 is provided with a fixed handle 42. The handle 42 is located outside the circumference of the rotating sleeve 3. The handle 42 is provided with a ball 421. The ball 421 moves through a spring 422 inside the handle 42. The spring 422 is in a compressed state. The ball 421 is nested with the spherical groove 33 on the circumference of the rotating sleeve 3. When nested, most of the ball 421 is inside the handle 42. When the ball 421 is nested in the spherical groove 33, the annular cover plate 4 is fixed and the first channel 21 and the second channel 31 are in the open state.
[0044] like Figure 1 , Figure 2 As shown, the rotating bushing 3 has a limiting strip hole 32 on its circumference. The handle 42 passes through the limiting strip hole 32 and is slidable. The spherical groove 33 is located at the end of the limiting strip hole 32. The limiting strip hole 32 limits the movement of the handle 42.
[0045] like Figure 1 , Figure 2 As shown, the circumferential surface of the rotating sleeve 3 is provided with two spherical grooves 33. The two spherical grooves 33 are respectively located at the two ends of the limiting strip hole 32. When the handle 42 is turned to switch the position of the ball 421 in the two spherical grooves 33, the annular cover plate 4 opens and closes the channel 1 21 and the channel 2 31.
[0046] An electric motor includes a motor end cover, which is fixedly connected to the end of the motor housing via mounting holes 121 and bolts, serving as an output end cover suitable for most low-power motors.
[0047] In practice, the end cover body 1 is fixedly installed on the end of the motor housing through the mounting hole 121, the bearing 51 is fixed in the bearing mounting area 5, and the motor shaft passes through the bearing 51 and the shaft sleeve 3. When the motor is working, channel one 21 and channel two 31 are kept open. Channel one 21 vents and dissipates heat around the bearing 51, and channel two 31 vents and dissipates heat inside the bearing 51. When the motor is stopped, lubricating oil can be injected into the ball bearings of the bearing 51 through channel two 31 to maintain the bearing 51. Then, the handle 42 is moved to the other end of the limiting strip hole 32 to make the ball 421 engage in another spherical groove 33, thus closing the annular cover plate 4 to channel one 21 and channel two 31 and preventing moisture from entering the motor.
[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the actual scope of protection is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this invention should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.
Claims
1. A motor end cover, comprising an end cover body (1), wherein a bearing sleeve (2) and a rotating shaft sleeve (3) are provided at the center of the end cover body (1), the inner diameter of the bearing sleeve (2) is larger than the inner diameter of the rotating shaft sleeve (3) and forms a bearing mounting area (5), the bearing mounting area (5) is used to install a bearing (51), a plurality of reinforcing ribs (11) are provided on both sides of the end cover body (1), a plurality of fixing ears (12) are provided around the end cover body (1), the fixing ears (12) are provided with mounting holes (121), and the end cover body (1), the bearing sleeve (2), the rotating shaft sleeve (3), the reinforcing ribs (11), and the fixing ears (12) are fixed together, characterized in that: The bearing sleeve (2) is provided with several channels one (21), the channels one (21) pass through the rotating shaft sleeve (3), the rotating shaft sleeve (3) is provided with several channels two (31), the channels one (21) and the channels two (31) connect the bearing installation area (5).
2. The motor end cover according to claim 1, characterized in that, The inner opening 1 (211) of the first channel (21) is located on the inner wall of the bearing sleeve (2), the inner opening 2 (311) of the second channel (31) is located on the inner end face of the rotating shaft sleeve (3), and corresponds to the radial position of the ball of the bearing (51) after installation. The outer opening 1 (212) of the first channel (21) and the outer opening 2 (312) of the second channel (31) are located on the outer end face of the rotating shaft sleeve (3), and the first channel (21) is located on the periphery of the second channel (31).
3. A motor end cover according to claim 2, characterized in that, The inner opening one (211) and outer opening one (212) are rectangular strip holes. The length direction of the inner opening one (211) is along the axial direction of the bearing sleeve (2). The inner opening two (311) and outer opening two (312) are round holes.
4. A motor end cover according to claim 3, characterized in that, The first channel (21) has 12 channels evenly distributed in the circumference, and the second channel (31) has 6 channels evenly distributed in the circumference.
5. A motor end cover according to any one of claims 1-3, characterized in that, The outer end of the rotating sleeve (3) is provided with a rotatable annular cover plate (4). The annular cover plate (4) is provided with several through holes (41) corresponding to channel one (21) and channel two (31). The annular cover plate (4) is provided with a fixed handle (42). The handle (42) is located outside the circumference of the rotating sleeve (3). The handle (42) is provided with a ball (421). The ball (421) moves through the spring (422) inside the handle (42). The ball (421) is nested and engaged with the spherical groove (33) on the circumference of the rotating sleeve (3).
6. A motor end cover according to claim 5, characterized in that, The rotating bushing (3) has a limiting strip hole (32) on its circumference. The handle (42) passes through the limiting strip hole (32) and can slide. The spherical groove (33) is located at the end of the limiting strip hole (32).
7. A motor end cover according to claim 6, characterized in that, The rotating bushing (3) has two spherical grooves (33) on its circumference, and the two spherical grooves (33) are located at the two ends of the limiting strip hole (32).
8. An electric motor, characterized in that, Includes a motor end cover according to any one of claims 1-7.