ESC motor with sealed bearing

Abstract

The utility model discloses an ESC motor with a sealing bearing. The ESC motor comprises a shell, a central rotating shaft, a rotor, a ball bearing, a needle bearing, an end cover and a sealing check ring, a rotatable central rotating shaft is mounted in the shell, a rotor is mounted on the central rotating shaft, the shell is sealed by an end cover, the rotor is sealed in the shell by the end cover, and the central rotating shaft penetrates through the end cover; the center rotating shaft comprises an axis shaft body and an eccentric shaft body, the axis shaft body is installed in the shell and penetrates through the shell, the end, located outside the shell, of the axis shaft body is fixed to the eccentric shaft body, the end, close to the axis shaft body, of the eccentric shaft body penetrates through the ball bearing, and the middle of the eccentric shaft body penetrates through the needle bearing. The ESC motor with the sealed bearing solves the problem that in the prior art, oil cannot be prevented from entering the shell from the gap between the central rotating shaft and the end cover.

Description

Technical Field

[0001] The utility model relates to an ESC motor, in particular to an ESC motor with a sealed bearing. Background Art

[0002] In the prior art, the ESC motor includes: a casing, a central shaft, a rotor, a stator core and an end cover. A rotatable central shaft is installed in the casing, a rotor is installed on the central shaft, a stator core is surrounded by the rotor, the stator core is installed on the inner wall of the casing, the casing is closed by the end cover, the end cover seals the rotor and the stator core in the end cover, and the central shaft passes through the end cover.

[0003] Although the above-mentioned ESC motor can rotate when powered, the ESC motor still has the following disadvantages: since the ESC motor needs to be connected to external equipment, the external equipment may leak oil, etc., and the oil entering the outer casing of the ESC motor will affect the overall performance of the ESC motor. Therefore, how to prevent the oil from entering the outer casing through the gap between the central shaft and the end cover is an urgent problem to be solved. Utility Model Content

[0004] The utility model provides an ESC motor with a sealed bearing, which solves the problem in the prior art that oil cannot be prevented from entering the housing through the gap between the central rotating shaft and the end cover.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses an ESC motor with a sealed bearing, comprising: a shell, a central rotating shaft, a rotor, a ball bearing, a needle bearing, an end cover and a sealing retaining ring; a rotatable central rotating shaft is installed in the shell, a rotor is installed on the central rotating shaft, the shell is closed by the end cover, the end cover seals the rotor in the shell, and the end cover is passed through the central rotating shaft; the central rotating shaft comprises: an axial shaft body and an eccentric shaft body, the axial shaft body is installed in the shell, and the axial shaft body passes through the shell, the end of the axial shaft body located outside the shell is fixed to the eccentric shaft body, the end of the eccentric shaft body close to the axial shaft body passes through the ball bearing, the middle of the eccentric shaft body passes through the needle bearing, a sealing retaining ring is installed on the side of the needle bearing away from the ball bearing, the sealing retaining ring presses the needle bearing and the ball bearing onto the end cover, and the sealing retaining ring seals the gap between the needle bearing and the eccentric shaft body.

[0007] Preferably, the needle bearing comprises: an outer cylinder and a rotating rod, wherein a rotatable rotating rod is installed outside the outer cylinder, and there are at least three rotating rods, and all the rotating rods surround the eccentric shaft body.

[0008] Preferably, the sealing retaining ring comprises: a fixed block and a first sealing ring, the fixed block is fixed on the outer cylinder, and the first sealing ring is pressed tightly between the fixed block and the outer cylinder.

[0009] Preferably, a primary protrusion of the end cover away from the housing forms a positioning convex ring, and the positioning convex ring positions the ball bearing.

[0010] Preferably, the ball bearing comprises: a rotating inner ring, a rotating outer ring and rolling balls, the rotating inner ring is installed in the rotating outer ring, at least three first rolling balls are clamped between the rotating inner ring and the rotating outer ring, and the rotating outer ring is installed in the positioning convex ring.

[0011] Preferably, a second sealing ring is installed on the rotating outer ring, and the second sealing ring is in close contact with the inner wall of the positioning convex ring.

[0012] Preferably, the end cover is provided with a through hole through which one end of the commutator can pass, the through hole is communicated with the positioning convex ring, and the through hole is blocked by a ball bearing.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] First of all, since the central rotating shaft in the present application includes an axial shaft body and an eccentric shaft body, a needle bearing is designed to guide the connection between the axial shaft body and the eccentric shaft body. The setting of the eccentric shaft body causes a heavy burden on the connection between the axial shaft body and the eccentric shaft body when driving external objects, and it is very easy for the connection between the axial shaft body and the eccentric shaft body to break. Therefore, a ball bearing is provided to cooperate with a positioning convex ring, so that the positioning convex ring and the ball bearing on the end cover have the function of limiting the breakage of the connection between the axial shaft body and the eccentric shaft body, thereby extending the service life.

[0015] Then, in order to realize the ESC motor with sealed bearing driving the external load, due to the eccentric setting of the eccentric shaft, when the axial shaft rotates, the centerline of the eccentric shaft can move relative to the centerline of the axial shaft, so the external load can be a press column type load, and the press column in the press column type load is squeezed by the eccentric shaft to achieve the driving purpose. In order to ensure that the eccentric shaft drives the press column in the press column type load smoothly, a needle bearing is designed. The eccentric shaft is in close contact with the press column in the press column type load through the needle bearing, thereby ensuring that the eccentric shaft can rotate relative to the press column in the press column type load, and also realizing that when the press column in the press column type load is eccentric, the press column in the press column type load is pushed.

[0016] Finally, since external loads may cause oil leakage, a sealing ring is provided to seal the connection between the shaft and the needle bearing, thereby blocking the oil and preventing it from entering the housing of the ESC motor with sealed bearings, thereby ensuring that the ESC motor with sealed bearings can run stably.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an ESC motor with sealed bearings.

[0019] Figure 2 A cross-sectional view of an ESC motor with sealed bearings.

[0020] Figure 3 An exploded view of an ESC motor with sealed bearings.

[0021] Figure numerals: outer shell 1, central shaft 2, axial shaft body 21, eccentric shaft body 22, rotor 3, ball bearing 4, rotating inner ring 41, rotating outer ring 42, ball 43, second sealing ring 40, needle bearing 5, outer cylinder 51, rotating rod 52, end cover 6, positioning convex ring 60, through hole 61, sealing retaining ring 7, fixing block 71, first sealing ring 72, commutator 8. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0023] like Figures 1 to 3 As shown, the utility model discloses an ESC motor with a sealed bearing, comprising: a housing 1, a central shaft 2, a rotor 3, a ball bearing 4, a needle bearing 5, an end cover 6 and a sealing retaining ring 7; a rotatable central shaft 2 is installed in the housing 1, a rotor 3 is installed on the central shaft 2, the housing 1 is closed by the end cover 6, the end cover 6 closes the rotor 3 in the housing 1, and the end cover 6 is passed through the central shaft 2; the central shaft 2 comprises: an axial shaft body 21 and an eccentric shaft body 22, the axial shaft body 21 It is installed in the shell 1, and the axial shaft body 21 passes through the shell 1. The end of the axial shaft body 21 outside the shell 1 is fixed to the eccentric shaft body 22. The end of the eccentric shaft body 22 close to the axial shaft body 21 passes through the ball bearing 4. The middle part of the eccentric shaft body 22 passes through the needle bearing 5. A sealing ring 7 is installed on the side of the needle bearing 5 away from the ball bearing 4. The sealing ring 7 presses the needle bearing 5 and the ball bearing 4 onto the end cover 6. The sealing ring 7 seals the gap between the needle bearing 5 and the eccentric shaft body 22.

[0024] The needle bearing 5 includes an outer cylinder 51 and a rotating rod 52. The outer cylinder 51 is provided with a rotating rod 52 capable of rotation. There are at least three rotating rods 52, and all the rotating rods 52 surround the eccentric shaft 22. The eccentric shaft 22 can rotate smoothly relative to the outer cylinder 51.

[0025] The sealing ring 7 includes a fixed block 71 and a first sealing ring 72. The fixed block 71 is fixed on the outer cylinder 51, and the first sealing ring 72 is pressed between the fixed block 71 and the outer cylinder 51. The first sealing ring 72 is installed in the gap between the needle bearing 5 and the eccentric shaft 22 through the fixed block 71.

[0026] The end cover 6 is protruded away from the housing 1 to form a positioning convex ring 60, and the positioning convex ring 60 positions the ball bearing 4. Since the entire ESC motor with sealed bearing adopts a horizontal structure, so that the needle bearing 5 on the eccentric shaft 22 of the ESC motor with sealed bearing can fully contact the pressing column in the vertical direction of the external pressing column load, if there is no positioning convex ring 60, all the weight of the eccentric shaft 22 is on the shaft shaft 21, and in addition, the shaft shaft 21 needs to drive the eccentric shaft 22 to rotate eccentrically, so the connection between the eccentric shaft 22 and the shaft shaft 21 is heavily burdened, so the positioning convex ring 60 is provided, and the connection between the shaft shaft 21 and the eccentric shaft 22 is supported by the ball bearing 4, thereby protecting the connection between the shaft shaft 21 and the eccentric shaft 22.

[0027] The ball bearing 4 includes: a rotating inner ring 41 , a rotating outer ring 42 and rolling balls 43 . The rotating inner ring 41 is installed in the rotating outer ring 42 . At least three first rolling balls 43 are clamped between the rotating inner ring 41 and the rotating outer ring 42 . The rotating outer ring 42 is installed in the positioning convex ring 60 .

[0028] The second sealing ring 40 is mounted on the rotating outer ring 42 , and the second sealing ring 40 is in close contact with the inner wall of the positioning convex ring 60 , so that the rotating outer ring 42 of the ball bearing 4 seals the through hole 61 .

[0029] The end cover 6 is provided with a through hole 61 through which one end of the commutator 8 can pass. The through hole 61 is communicated with the positioning convex ring 60 , and the through hole 61 is blocked by the ball bearing 4 .

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. ESC motor with sealed bearing, characterized in that: include: A housing (1), a central shaft (2), a rotor (3), a ball bearing (4), a needle bearing (5), an end cover (6) and a sealing ring (7); A rotatable central shaft (2) is installed in the outer shell (1), a rotor (3) is installed on the central shaft (2), the outer shell (1) is closed by an end cover (6), the end cover (6) seals the rotor (3) in the outer shell (1), and the end cover (6) is penetrated by the central shaft (2); The central rotating shaft (2) comprises: an axial shaft body (21) and an eccentric shaft body (22); the axial shaft body (21) is installed in the housing (1), and the axial shaft body (21) passes through the housing (1); the end of the axial shaft body (21) outside the housing (1) is fixed to the eccentric shaft body (22); the end of the eccentric shaft body (22) close to the axial shaft body (21) passes through the ball bearing (4); the middle of the eccentric shaft body (22) passes through the needle bearing (5); a sealing retaining ring (7) is installed on the side of the needle bearing (5) away from the ball bearing (4); the sealing retaining ring (7) presses the needle bearing (5) and the ball bearing (4) onto the end cover (6); and the sealing retaining ring (7) seals the gap between the needle bearing (5) and the eccentric shaft body (22).

2. The ESC motor with sealed bearing according to claim 1, characterized in that: The needle bearing (5) comprises an outer cylinder (51) and a rotating rod (52). The outer cylinder (51) is provided with a rotatable rotating rod (52). There are at least three rotating rods (52), and all the rotating rods (52) surround the outside of the eccentric shaft (22).

3. The ESC motor with sealed bearing according to claim 2, characterized in that: The sealing retaining ring (7) comprises: a fixed block (71) and a first sealing ring (72); the fixed block (71) is fixed on the outer cylinder (51); and the first sealing ring (72) is tightly pressed between the fixed block (71) and the outer cylinder (51).

4. The ESC motor with sealed bearing according to claim 3, characterized in that: A primary protrusion of the end cover (6) away from the housing (1) forms a positioning convex ring (60), and the positioning convex ring (60) positions the ball bearing (4).

5. The ESC motor with sealed bearing according to claim 4, characterized in that: The ball bearing (4) comprises: a rotating inner ring (41), a rotating outer ring (42) and rolling balls (43); the rotating inner ring (41) is installed inside the rotating outer ring (42); at least three first rolling balls (43) are clamped between the rotating inner ring (41) and the rotating outer ring (42); and the rotating outer ring (42) is installed inside a positioning convex ring (60).

6. The ESC motor with sealed bearing according to claim 5, characterized in that: A second sealing ring (40) is mounted on the rotating outer ring (42), and the second sealing ring (40) is in close contact with the inner wall of the positioning convex ring (60).

7. The ESC motor with sealed bearing according to claim 6, characterized in that: The end cover (6) is provided with a through hole (61) through which one end of the commutator (8) can pass, the through hole (61) is communicated with the positioning convex ring (60), and the through hole (61) is blocked by the ball bearing (4).

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