CN213402669U

CN213402669U - Electric machine

Info

Publication number: CN213402669U
Application number: CN202022393323.5U
Authority: CN
Inventors: 杨康康
Original assignee: Jiangsu Jingwei Rail Traffic Equipment Co ltd
Current assignee: Jiangsu Jingwei Rail Traffic Equipment Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-06-08
Anticipated expiration: 2030-10-23

Abstract

The utility model discloses a motor, wherein, motor includes: a rotating shaft; the bearing unit comprises a bearing and a bearing seat, the bearing is sleeved outside the rotating shaft, and the bearing seat is sleeved outside the bearing; the end cover is sleeved outside the bearing seat and is detachably connected with the bearing seat; the static ring is sleeved outside the rotating shaft, and a labyrinth is arranged on the end face of the static ring opposite to the bearing seat; the movable ring is arranged outside the bearing seat and connected with the end cover through a pin shaft so as to limit circumferential movement of the movable ring relative to the static ring. The utility model discloses the end cover is difficult to take place circumferential direction, and the dismouting is efficient.

Description

Electric machine

Technical Field

The utility model relates to the technical field of electric machines, in particular to motor.

Background

Generally, a railway vehicle has a motor mounted on a bogie positioned under a main body of the railway vehicle, and a rotational force of the motor is transmitted to wheels through a gear mechanism and a joint, so that the vehicle runs. In the motor structure, a bearing seat for mounting a bearing is designed on an end cover, and the end cover is matched with a sealing ring for use to realize the mounting and positioning of the bearing. When the bearing needs to be changed and maintained, the motor generally needs to be disassembled, the bearing can be disassembled after the end cover is disassembled from the whole machine, and when the end cover is matched with the bearing seat to be completed, circumferential rotation is easy to occur to the end cover, and the disassembling and assembling efficiency is low.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a motor aims at improving and prevents that the end cover from carrying out circumferential direction, improves dismouting efficiency.

In order to achieve the above object, the utility model provides an electric machine, include:

a rotating shaft;

the bearing unit comprises a bearing and a bearing seat, the bearing is sleeved outside the rotating shaft, and the bearing seat is sleeved outside the bearing;

the end cover is sleeved outside the bearing seat and is detachably connected with the bearing seat;

the static ring is sleeved outside the rotating shaft, and a labyrinth is arranged on the end face of the static ring opposite to the bearing seat; and

the movable ring is arranged outside the bearing seat and connected with the end cover through a pin shaft so as to limit circumferential movement of the movable ring relative to the static ring.

Optionally, the pin shaft is parallel to the rotating shaft.

Optionally, the pin shaft penetrates through the movable ring and is connected with the end cover.

Optionally, the pin shaft is in clearance fit with the movable ring and in interference fit with the end cover.

Optionally, the outer periphery of the movable ring is in sliding fit with the end cover.

Optionally, the periphery of the movable ring is provided with a plurality of bosses, and the end cover is provided with grooves matched with the bosses.

Optionally, a chamber for accommodating an end of the movable ring is provided inside the stationary ring.

Optionally, the inner ring of the end portion of the moving ring is of a cylindrical surface structure, and the outer ring of the end portion of the moving ring is of a conical surface structure.

Optionally, the motor further includes an oil injection passage, and the oil injection passage passes through the end cover and the bearing seat and is communicated with the labyrinth.

Optionally, the motor further comprises an oil discharge channel, and the oil discharge channel penetrates through the end cover and the bearing seat and is communicated with the labyrinth.

The utility model discloses the motor includes the pivot, the bearing unit, the end cover, quiet ring sum rotating ring, the bearing unit includes bearing and bearing frame, outside the pivot was located to the bearing housing, outside the bearing was located to the bearing housing, the end cover was located outside the bearing frame, and can dismantle with the bearing frame and be connected, quiet ring cover is located outside the pivot, the terminal surface that quiet ring is relative with the bearing frame is equipped with the maze, the bearing frame is located to the rotating ring outside, the rotating ring passes through the round pin hub connection with the end cover, after the end cover is accomplished with the bearing frame cooperation, be connected rotating ring sum end cover through the round pin axle, carry out circumferential motion for quiet ring with the restriction rotating ring, both can realize the axial displacement of rotating ring, can effectually prevent the circumferential motion of. The end cover is not easy to rotate circumferentially, so that the disassembly and assembly efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic diagram of a partial explosion structure of an embodiment of the motor of the present invention;

fig. 2 is a schematic sectional view of the motor of the present invention;

FIG. 3 is a schematic cross-sectional view of the motor shown in FIG. 2 from another perspective;

FIG. 4 is a schematic cross-sectional view of the motor shown in FIG. 2 from a further perspective;

FIG. 5 is a schematic structural view of the rotating ring of FIG. 2;

FIG. 6 is a schematic view of the movable ring of FIG. 2 from another perspective;

fig. 7 is a schematic cross-sectional view of another embodiment of the motor of the present invention;

fig. 8 is a schematic structural view of the rotating ring in fig. 7.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a motor 100 especially relates to track trade traction motor, but is not limited to track trade traction motor.

Referring to fig. 1 to 8, in an embodiment of the present invention, the motor 100 includes:

a rotating shaft 10;

the bearing unit 20 comprises a bearing 21 and a bearing seat 22, the bearing 21 is sleeved outside the rotating shaft 10, and the bearing seat 22 is sleeved outside the bearing 21;

the end cover 40 is sleeved outside the bearing seat 22, and is detachably connected with the bearing seat 22;

the static ring 50 is sleeved outside the rotating shaft 10, and a labyrinth 70 is arranged on the end surface of the static ring 50 opposite to the bearing seat 22; and

the movable ring 60 is arranged outside the bearing seat 22, and the movable ring 60 is connected with the end cover 40 through a pin shaft 80 so as to limit circumferential movement of the movable ring 60 relative to the stationary ring 50.

Specifically, the rotating shaft 10 is substantially cylindrical, and an end of the rotating shaft 10 is connected to a gear mechanism and an engaging member, and is transmitted to the wheel through the gear mechanism and the engaging member, so that the vehicle runs. The bearing 21 is sleeved on the rotating shaft 10 and is in interference fit with the rotating shaft, the bearing seat 22 is sleeved outside the bearing 21, the bearing seat 22 is provided with a mounting cavity 220, the bearing 21 is accommodated in the mounting cavity 220, and grease with a lubricating effect is stored in the mounting cavity 220.

The bearing seat 22 is used for realizing the installation and positioning of the bearing 21, and the end cover 40 is detachably connected with the bearing seat 22 and plays a role of fixing the bearing seat 22. In this embodiment, the end cap 40 is detachably connected to the bearing seat 22 by the third fastening member 130, but in other embodiments, the end cap and the bearing seat may be connected by a snap or other detachable connection method as long as the function of conveniently detaching the end cap and the bearing seat is achieved.

The static ring 50 comprises a first supporting static ring 51 and a second supporting static ring 52, the first supporting static ring 51 and the second supporting static ring 52 are respectively arranged at two opposite ends of the bearing 21 and are connected with the rotating shaft 10 in an interference fit manner, the first supporting static ring 51 and the second supporting static ring 52 are sleeved outside the rotating shaft 10, the rotating ring 60 and the first supporting static ring 51 are oppositely arranged, the rotating ring 60 can move relative to the first supporting static ring 51, when the rotating ring 60 moves to abut against the first supporting static ring 51, the rotating ring 60 and the first supporting static ring 51 jointly support the rotating shaft 10, when the motor 100 normally works, the rotating shaft 10 drives the bearing 21, the first supporting static ring 51 and the second supporting static ring 52 to rotate, and at the moment, the rotating ring 60 and the first supporting static ring 51 are in a separation state; when motor 100 need change bearing 21, with rotating ring 60 and end cover 40 split to move rotating ring 60 to with first support quiet ring 51 butt, rotating ring 60 and first support quiet ring 51 support countershaft 21 jointly this moment, only need with bearing frame 22 and end cover 40 split, and support quiet ring 52 with bearing frame 22 and second and dismantle from pivot 10 and get off and can change bearing 10, need not to disintegrate whole motor 100, it is convenient to dismantle.

In order to limit and fix the second supporting stationary ring 52, the end cover 40 and the bearing seat 22, the motor 100 further includes a cover plate 90, an installation groove 90a is formed between the end cover 40, the bearing seat 22 and the second supporting stationary ring 52 in a matching manner, and the cover plate 90 is covered in the installation groove 90a and is detachably connected with the bearing seat 22. In this embodiment, the cover plate 90 is detachably connected to the bearing seat 22 through the fourth fastening member 140, and certainly, in other embodiments, a structure such as a buckle may be further provided to detachably connect the cover plate and the bearing seat, which are all within the protection scope of this patent.

In this embodiment, in order to facilitate the installation and the removal of the bearing 21, the bearing seat 22 is configured as the first bearing part 221 and the second bearing part 222, and the first bearing part 221 and the second bearing part 222 are detachably connected by the second fastener 120.

The first bearing part 221 is arranged opposite to the first supporting static ring 51 and is rotatably connected with the first supporting static ring 51, the second bearing part 222 is arranged opposite to the second supporting static ring 52 and is rotatably connected with the second supporting static ring 52, the first bearing part 221 is detachably connected with the second bearing part 222, and the first bearing part 221 and the second bearing part 222 enclose to form the mounting cavity 220.

The rotating ring 60 is disposed outside the bearing seat 22, and it can be understood that the rotating ring 60 and the bearing seat 22 may be in butt fit or clearance fit, and may be disposed as required, all within the protection scope of this patent.

The utility model discloses motor 100 includes pivot 10, bearing unit 20, end cover 40, quiet ring 50 and rotating ring 60, bearing unit 20 includes bearing 21 and bearing frame 22, bearing 21 cover is located outside pivot 10, bearing frame 22 cover is located outside bearing 21, end cover 40 cover is located outside bearing frame 22, and can dismantle with bearing frame 22 and be connected, quiet ring 50 cover is located outside pivot 10, quiet ring 50 is equipped with labyrinth 70 with the terminal surface that bearing frame 22 is relative, rotating ring 60 locates the bearing frame 22 outside, rotating ring 60 is connected through round pin axle 80 with end cover 40, accomplish the back when end cover 40 and bearing frame 22 cooperation, be connected rotating ring 60 and end cover 40 through round pin axle 80, carry out circumferential motion for quiet ring 50 with the restriction rotating ring 60, both can realize the axial displacement of rotating ring 60, can effectually prevent end cover 40's circumferential direction again, can make rotating ring 60 accurate the reseing. Circumferential rotation of the end cover 40 is not likely to occur, thereby improving the disassembly and assembly efficiency.

Referring to fig. 4, the pin 80 is parallel to the rotating shaft 10.

In this embodiment, if the pin shaft 80 is not parallel to the rotating shaft 10 and disposed at an included angle, when the end cover 40 and the movable ring 60 are engaged with each other, eccentricity easily occurs, and the assembly is difficult due to the fact that the end cover and the movable ring are not easily observed by naked eyes.

Further, a pin 80 is connected to the end cap 40 through the movable ring 60.

In this embodiment, when the motor 100 operates normally, the movable ring 60 is fixed to the end cover 40 by the first fastening member 110, and the rotating shaft 10 supports the end cover by the bearing 21. When maintenance or replacement of the bearing 21 is required, the fourth fastening member 140 of the cover plate 90 is removed, the first fastening member 110 between the movable ring 60 and the end cover 40 is removed, and the movable ring 60 is pushed axially by using the jackscrew hole on the end cover 40 until the movable ring is in contact with the first supporting stationary ring 51. The second fastener 120 between the first bearing 221 and the second bearing 222 is then removed, and the bearing unit 20 can be removed using the jackscrew hole in the bearing housing 22. When the bearing 22 is replaced for maintenance and the bearing unit 20 is installed, the bearing seat 22 is fixed on the end cover 40 by the third fastening member 130, and then the movable ring 60 is pulled back and locked with the end cover 40 by the first fastening member 110.

The first fastener 110 penetrates through the end cover 40 to be connected and fixed with the movable ring 60, the pin 80 penetrates through the movable ring 60 to be connected with the end cover 40, and the first fastener 110 and the pin 80 are installed in opposite directions and are convenient to detach and fix.

Further, the pin 80 is in clearance fit with the movable ring 60 and in interference fit with the end cap 40. In this embodiment, the connection mode is adopted, so that the reliability of the connection between the movable ring 60 and the end cover 40 is high.

Referring to fig. 7 and 8, the outer periphery of the movable ring 60 is slidably engaged with the end cap 40.

In this embodiment, the periphery of the rotating ring 60 is in sliding fit with the end cover 40, and the periphery of the rotating ring 60 can be provided with a sliding surface or a sliding structure matched with the end cover 40, so as to achieve the purposes of accurate positioning and quick installation between the two.

Further, in an embodiment, the outer circumference of the movable ring 60 is provided with a plurality of bosses 61, and the end cover 40 has a groove 41 matching with the bosses 61. The boss 61 is in sliding fit with the groove 41, so that the movable ring 60 and the end cover 40 can be accurately positioned.

In this embodiment, the plurality of bosses 61 may be uniformly distributed or non-uniformly distributed, and one boss 61 is accommodated in one groove 41 during assembly, so that circumferential spacing of the rotating ring 60 may be achieved, rotation of the rotating shaft 10 in the circumferential direction is avoided, and accurate resetting is facilitated.

Referring to fig. 2 to 6, in an embodiment, an inner side of the first supporting stationary ring 51 is slidably engaged with an outer side of the movable ring 60, the first supporting stationary ring 51 is provided with a first inclined surface 512, the movable ring 60 is provided with a second inclined surface 62, and when the movable ring 60 moves to abut against the first supporting stationary ring 51, the first inclined surface 512 is slidably engaged with the second inclined surface 62.

In this embodiment, when the motor 100 operates normally, the movable ring 60 is fixed to the end cover 40 by the first fastening member 110, and the rotating shaft 10 supports the end cover by the bearing 21. When bearing 21 needs to be replaced, in order to support and position rotating shaft 10 in the process of detaching bearing 21 and ensure that rotating shaft 10 is concentric with the stator, when rotating ring 60 is moved to abut against first supporting static ring 51, first inclined surface 512 and second inclined surface 62 are in sliding fit, and first supporting static ring 51 and rotating ring 60 support rotating shaft 10 together.

Referring to fig. 7, in another embodiment, a chamber 511 for accommodating an end of the rotating ring 60 is formed inside the stationary ring 50.

In this embodiment, when the bearing unit 20 is disassembled, the movable ring 60 is moved axially to be matched with the first supporting stationary ring 51 by the jackscrew, and when the movable ring 60 is moved to be abutted against the first supporting stationary ring 51, the end of the movable ring 60 is limited in the accommodating chamber 511, so that the axial movement of the movable ring 60 can be ensured, and the movable ring 60 can be prevented from being deflected in the moving process.

Furthermore, in order to effectively prevent the movable ring 60 from deflecting during axial movement, the inner ring of the end portion of the movable ring 60 is of a cylindrical surface structure, and the outer ring of the end portion of the movable ring 60 is of a conical surface structure.

Referring to fig. 3, the motor 100 further includes an oil injection passage 70a, and the oil injection passage 70a passes through the end cap 40 and the bearing housing 22 and communicates with the labyrinth 70.

In this embodiment, the oil injection passage 70a includes a first oil injection passage 40a disposed on the end cover 40 and a second oil injection passage 22a disposed on the bearing seat 22, one end of the second oil injection passage 22a is communicated with the first oil injection passage 40a, the other end thereof is communicated with the mounting cavity 220, and the mounting cavity 220 is communicated with the labyrinth 70. In order to reduce the gap between the second oil filling passage 22a and the first oil filling passage 40a and prevent oil leakage, the bearing housing 22 and the end cap 40 may be selected from plastics having some elasticity, or an elastic pad may be provided therebetween. It can be understood that the second oil filling channel 22a has one end communicating with the first oil filling channel 40a and the other end communicating with the installation cavity 220, and the grease can only flow from the first oil filling channel 40a to the second oil filling channel 22a and then to the installation cavity 220, and only flows in one direction and does not flow in the opposite direction. A nipple (not shown) may be provided in the first filling passage 40a, and a spring may be provided in the nipple to realize a one-way flow by an elastic force of the spring (refer to a direction indicated by an arrow in fig. 3 as a grease flowing direction).

Referring to fig. 4, the motor 100 further includes an oil drain passage 70b, and the oil drain passage 70b passes through the end cover 40 and the bearing housing 22 and communicates with the labyrinth 70.

In this embodiment, the oil discharge passage 70b includes a first oil discharge passage 40b disposed on the end cover 40 and a second oil discharge passage 22b disposed on the bearing seat 22, one end of the second oil discharge passage 22b is communicated with the first oil discharge passage 40b, the other end of the second oil discharge passage is communicated with the mounting cavity 220, the mounting cavity 220 is communicated with the labyrinth 70, the first oil discharge passage 40b and the first oil injection passage 40a are arranged at an interval, and the second oil discharge passage 22b and the second oil injection passage 22a are arranged at an interval.

Similarly, in order to reduce the gap between the second oil discharge passage 22b and the first oil discharge passage 40b and prevent oil leakage, the bearing housing 22 and the end cover 40 may be made of plastic having certain elasticity, or an elastic pad may be disposed therebetween. The first oil discharge passage 40b and the first oil injection passage 40a are arranged at an interval, and the second oil discharge passage 22b and the second oil injection passage 22a are arranged at an interval, so that the oil injection and the oil discharge are ensured not to interfere with each other (please refer to the direction indicated by the arrow in fig. 4 as the oil flowing direction).

The end cover 40 is provided with a first oil injection channel 40a, the bearing seat 22 is provided with a second oil injection channel 22a, one end of the second oil injection channel 22a is communicated with the first oil injection channel 40a, the other end of the second oil injection channel is communicated with the mounting cavity 220, the end cover 40 is provided with a first oil discharge channel 40b, the bearing seat 22 is provided with a second oil discharge channel 22b, one end of the second oil discharge channel 22b is communicated with the first oil discharge channel 40b, the other end of the second oil discharge channel is communicated with the mounting cavity 220, the first oil discharge channel 40b is arranged at an interval with the first oil injection channel 40a, and the second oil discharge channel 22b is arranged at an interval with the second oil injection channel 22 a.

Referring to fig. 1 to 8, a labyrinth 70 is disposed between the first stationary support ring 51 and the bearing seat 22, and the second oil injection passage 22a is disposed adjacent to the labyrinth 70. A labyrinth 70 is provided between the second support stationary ring 52 and the bearing housing 22, and a second oil discharge passage 22b is provided adjacent to the labyrinth 70. A labyrinth 70 is arranged between the first support stationary ring 51 and the bearing seat 22, and the second oil injection passage 22a is arranged adjacent to the labyrinth 70, so that grease can flow from the installation cavity 220 to the labyrinth 70 quickly.

In this embodiment, the effect of stationary ring 50 and rotating ring 60 is supporting and fixing a position pivot 10 at the process of dismantling bearing 21, wherein, the relative both ends of bearing 21 are located to first support stationary ring 51 and second support stationary ring 52 branch, support stationary ring 52 and bearing frame 22 through first support stationary ring 51, second and carry out spacingly to bearing 21 jointly, in order to set up bearing 21 in the fixed position of pivot 10 accurately, at the protruding spacing step 150 that is equipped with of pivot 10, the surface butt spacing step 150 that bearing 21 was kept away from to first support stationary ring 51.

Because the sealing structure of the mounting cavity 220 is simple and there is a risk of oil leakage, during the operation of the motor 100, grease is thrown out of the support assembly 50 due to centrifugal force, a labyrinth 70 is provided between the first support stationary ring 51 and the bearing seat 22, and the second oil injection passage 22a is disposed adjacent to the labyrinth 70. A labyrinth 70 is provided between the second support stationary ring 52 and the bearing housing 22, the second oil discharge passage 22b is provided adjacent to the labyrinth 70, the labyrinth 70 is operable to store a portion of the grease thrown off by the second grease injection passage 22a, and the labyrinth 70 is operable to store a portion of the grease thrown off by the second oil discharge passage 22 b. The labyrinth 70 can reliably protect the bearing 21, realize the sealing of grease in the mounting cavity 220 and avoid the leakage of grease.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electric machine, comprising:

a rotating shaft;

2. The motor of claim 1, wherein said pin is parallel to said shaft.

3. The motor of claim 2, wherein said pin shaft extends through said rotating ring and is connected to said end cap.

4. The electric machine of claim 3 wherein said pin is a clearance fit with said rotating ring and an interference fit with said end cap.

5. The motor of claim 1 wherein the outer periphery of the rotating ring is a sliding fit with the end cap.

6. The motor of claim 5, wherein the outer periphery of the rotating ring is provided with a plurality of bosses, and the end cover is provided with grooves matched with the bosses.

7. The motor of claim 1, wherein a chamber is provided inside the stationary ring to receive an end of the rotating ring.

8. The motor of claim 7, wherein the inner ring of the end portion of the rotating ring has a cylindrical structure and the outer ring of the end portion of the rotating ring has a tapered structure.

9. The motor of claim 1 further comprising an oil injection passage passing through said end cap and said bearing housing and communicating with said labyrinth.

10. The machine of claim 1 further comprising an oil drain passage extending through said end cap and said bearing housing and communicating with said labyrinth.