Electric vehicle motor oil seal waterproof structure

Abstract

The utility model discloses an electric vehicle motor oil seal waterproof structure, which belongs to the technical field of motor sealing, and comprises a limit ring, a first elastic body and two groups of elastic restraining pieces, the limit ring is fixed in a mounting groove on a motor end cover, the limit ring comprises a cylinder body, the first elastic body comprises an annular body, the annular body is fixed on the inner wall of the cylinder body, and the two groups of elastic restraining pieces are arranged in the cylinder body. Two circles of sealing lips are symmetrically arranged on one side, close to the motor rotating shaft, of the annular body; and the two groups of elastic restraining pieces are arranged in the limiting ring. According to the utility model, the limiting ring, the first elastic body and the elastic restraining piece are arranged, and the first elastic body is provided with the two sealing lips, so that multiple sealing of the motor rotating shaft is realized; the design of the oil injection hole in the cylinder body and the through hole in the annular body enables lubricating oil to be injected into the cavity between the two sealing lips, the elastic sealing design of the through hole ensures that the lubricating oil cannot leak from the through hole, meanwhile, the two sealing lips and the motor rotating shaft are lubricated, and friction force is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor seal technical field, concretely relates to a waterproof structure of electric motor oil seal of electric motor car. BACKGROUND

[0002] The connecting place of motor rotating shaft and motor end cover of electric motor car motor needs to use oil seal to seal. Oil seal can seal the gap between motor rotating shaft and motor end cover, prevent lubricating oil from leaking outward along motor rotating shaft, and also can prevent water, dust and sand from invading into motor from outside. The conventional oil seal only has a sealing lip, after the outside dust enters between the sealing lip and motor rotating shaft, the motor rotating shaft rotates to make the dust or other pollutants rub the sealing lip, and the sealing lip is easy to wear and lose the sealing effect. SUMMARY

[0003] In view of the above technical deficiencies, the utility model aims at providing a waterproof structure of electric motor oil seal of electric motor car, which can effectively prevent dust and water, and avoid lubricating oil leakage.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: the utility model provides a waterproof structure of electric motor oil seal of electric motor car, which comprises:

[0005] The limiting ring is fixed in the mounting groove on the motor end cover, the limiting ring comprises a cylinder body, and the two ends of the cylinder body are respectively fixed with a first ring body and a second ring body;

[0006] The first elastic body is arranged on the inner side of the limiting ring, the first elastic body comprises an annular body, the annular body is fixed on the inner wall of the cylinder body, and two rows of sealing lips are symmetrically arranged on the side of the annular body close to the motor rotating shaft;

[0007] Two groups of elastic constraint members are arranged in the limiting ring and are respectively used for pressing the two rows of sealing lips towards the motor rotating shaft;

[0008] Among them, the cylinder body is provided with an oil injection hole, the annular body is provided with a through hole corresponding to the oil injection hole, and the through hole extends to the end part between the two sealing lips and is closed by the elasticity of the through hole.

[0009] Preferably, each group of elastic constraint members is evenly distributed in a ring shape with the axis of the limiting ring as the center, the elastic constraint member comprises a first arc segment, a second arc segment and a connecting segment, the first arc segment and the second arc segment are respectively fixed at the two ends of the connecting segment, and the connecting segment has elasticity.

[0010] Preferably, a cavity for installing the elastic constraint member is arranged on the annular body, the cavity is provided with a first abutting groove and a second abutting groove, the first abutting groove is located on the inner wall of the cavity close to the sealing lip, the first arc-shaped section abuts in the first abutting groove, the second abutting groove is located on the inner wall of the cavity away from the sealing lip, the connecting section abuts in the second abutting groove, and the second arc-shaped section abuts at the joint of the annular body and the limiting ring.

[0011] Preferably, the outer side edge of the first abutting groove is provided with a limiting protrusion.

[0012] Preferably, the first ring body is located on the inner side of the mounting groove, the second ring body is located on the outer side of the mounting groove, a skirt is fixed on the sealing lip adjacent to the second ring body, and the skirt extends into the gap between the second ring body and the motor rotating shaft.

[0013] Preferably, a flange is fixed on the outer wall of the limiting ring, and the flange is fixed on the motor end cover through bolts.

[0014] Preferably, a sealing gasket is arranged between the inner wall of the mounting groove and the limiting ring.

[0015] The electric vehicle motor oil seal waterproof structure has the advantages that:

[0016] The electric vehicle motor oil seal waterproof structure has the advantages that: The first elastic body has two sealing lips, multiple sealing of the motor rotating shaft is realized, water entry and lubricating oil leakage are effectively prevented, the elastic constraint member enables the sealing lips to closely adhere to the motor rotating shaft, even if vibration is generated during operation of the motor, the sealing effect is also good, the oil injection hole on the cylinder body and the through hole on the annular body enable lubricating oil to be injected into the cavity between the two sealing lips, the elastic sealing design of the through hole ensures that the lubricating oil cannot leak from the through hole, meanwhile, the two sealing lips and the motor rotating shaft are both lubricated, friction is reduced, and the dustproof and waterproof capability is further enhanced by the sealing gasket and the skirt. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0018] Figure 1 The use effect schematic view of the electric vehicle motor oil seal waterproof structure is shown in the embodiment of the present application.

[0019] Figure 2 The cross-sectional view of the present application is shown.

[0020] Figure 3 For Figure 2 a local enlarged view at A in the middle.

[0021] Figure 4 For the perspective view of the utility model.

[0022] Figure 5 For the structure diagram of the elastic restraint of the utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, limit ring, 2, mounting groove, 3, cylinder, 4, first ring body, 5, second ring body, 6, first elastic body, 7, annular body, 8, sealing lip, 9, oil hole, 10, through hole, 11, first arc section, 12, second arc section, 13, connecting section, 14, cavity, 15, first abutting groove, 16, second abutting groove, 17, limiting protrusion, 18, skirt, 19, convex edge, 20, sealing pad, 21, motor end cover, 22, motor shaft. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Embodiment one:

[0027] As Figures 1 to 5 shown, the utility model embodiment one provides a kind of electric motor of electric vehicle oil seal waterproof structure, its structure mainly includes limit ring 1, first elastic body 6 and two groups of elastic restraint.Just, limit ring 1 is fixed in the mounting groove 2 on motor end cover 21.As Figure 3 shown, limit ring 1 is specifically a cylinder 3, and first ring body 4 and second ring body 5 are fixed at the both ends of cylinder 3 respectively, and second ring body 5 is located at the outside of mounting groove 2.Limit ring 1 is metal material.In order to ensure firm fixation, a circle of convex edge 19 is fixed on the outer wall of limit ring 1, and the convex edge 19 is closely connected with motor end cover 21 by bolt.Meanwhile, between the inner wall of mounting groove 2 and first ring body 4, sealing pad 20 is additionally provided, when bolt is fastened in mounting groove 2, first ring body 4 abuts tightly sealing pad 20, so that the lubricating oil in motor cannot leak from the gap between mounting groove 2 and first ring body 4, to enhance waterproof effect and the sealing property of installation.

[0028] As Figure 3As shown, a first elastic body 6 is disposed on the side of the retaining ring 1 near the motor shaft 22. The first elastic body 6 is primarily composed of an annular body 7, which is fixed to the inner wall of the cylindrical body 3. The motor shaft 22 passes through the center of the annular body 7. Two symmetrical sealing lips 8 are disposed on the side of the annular body 7 near the motor shaft 22. The sealing lips 8 are capable of clamping onto the motor shaft 22, maintaining close contact with the motor shaft 22, thereby preventing lubricating oil from leaking through the gap between the sealing lips 8 and the motor shaft 22 and effectively preventing external moisture from entering the motor.

[0029] The first elastic body 6 and the two sealing lips 8 are an integral structure made of rubber. In order to enhance the fit between the sealing lips 8 and the motor shaft 22, the present invention has designed two sets of elastic restraints. These elastic restraints are symmetrically arranged in the limiting ring 1, and are respectively used to press the two rings of sealing lips 8 toward the motor shaft 22. Each set of elastic restraints is evenly distributed in a ring with the axis of the limiting ring 1 as the center to ensure uniform pressure distribution and sealing effect. Figure 3 and Figure 5 As shown, the elastic constraint member comprises a first arc segment 11, a second arc segment 12, and a connecting segment 13. The first arc segment 11 and the second arc segment 12 are respectively fixed to the ends of the connecting segment 13. The connecting segment 13 has a multi-turn curved structure and a certain degree of elasticity to adapt to different pressure changes. This ensures that when the first arc segment 11 and the second arc segment 12 are closer, there is an elastic force in the opposite direction, thereby pressing the sealing lip 8 against the motor shaft 22.

[0030] like Figure 3 As shown, cavities 14 for installing elastic constraints are symmetrically provided on both sides of the annular body 7. A first interference groove 15 and a second interference groove 16 are provided in the cavity 14. The first interference groove 15 is located on the inner wall of the cavity 14 close to the sealing lip 8, and is used to interfere with the first arc segment 11; the second interference groove 16 is located on the inner wall of the cavity 14 away from the sealing lip 8, and is used to interfere with the connecting segment 13. The second arc segment 12 interferes with the joint between the annular body 7 and the limiting ring 1. In this way, the second arc segment 12 and the connecting segment 13 can provide support to ensure the stability of the entire structure, so that the first arc segment 11 can stably press down the sealing lip 8. A limiting protrusion 17 is also designed on the outer edge of the first interference groove 15 to further stabilize the installation position of the elastic constraint and prevent the first arc segment 11 from detaching from the first interference groove 15.

[0031] Example 2:

[0032] On the basis of the above embodiment, in order to improve the waterproof effect, Figure 3As shown, a skirt 18 is fixed to the side of the sealing lip 8 adjacent to the second ring body 5. The skirt 18 extends into the gap between the second ring body 5 and the motor shaft 22, which can effectively prevent dust particles from entering the limiting ring 1 from this area.

[0033] Example 3:

[0034] To achieve lubrication and further waterproofing, e.g. Figure 3 As shown, the barrel 3 is provided with an oil filling hole 9, while the annular body 7 is provided with a through hole 10 corresponding to the oil filling hole 9. Lubricating oil can be injected into the cavity formed by the two sealing lips 8 and the motor shaft 22 through the oil filling hole 9 and the through hole 10 using a syringe. The end of the through hole 10 located between the two sealing lips 8 can be sealed by its own elasticity to ensure that oil does not leak from the through hole 10.

[0035] Thus, when the motor shaft 22 rotates, the sealing lip 8 near the motor interior has lubricant on both sides, minimizing friction between that sealing lip 8 and the motor shaft 22. The other sealing lip 8, on one side, also has lubricant, reducing friction with the motor shaft 22. If water from the outside enters the gap between the first elastic body 6 and the second ring body 5 through the gap between the second ring body 5 and the motor shaft 22, even if the gap between the sealing lip 8 near the motor exterior and the motor shaft 22 widens, the cavity between the two sealing lips 8 is filled with lubricant, making it difficult for water to enter the motor interior.

[0036] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. An electric vehicle motor oil seal waterproof structure, characterized in that, The application relates to a limiting ring (1) fixed in a mounting groove (2) on a motor end cover (21), wherein the limiting ring (1) comprises a cylinder body (3), the two ends of the cylinder body (3) are respectively fixed with a first ring body (4) and a second ring body (5), a first elastic body (6) is arranged on the inner side of the limiting ring (1), the first elastic body (6) comprises an annular body (7) fixed on the inner wall of the cylinder body (3), two circles of sealing lips (8) are symmetrically arranged on the side of the annular body (7) close to a motor rotating shaft (22), two groups of elastic constraint members are arranged in the limiting ring (1) and are used for pressing the two circles of sealing lips (8) towards the motor rotating shaft (22), an oil injection hole (9) is formed in the cylinder body (3), a through hole (10) corresponding to the oil injection hole (9) is formed in the annular body (7), and the through hole (10) is elastically closed at the end between the two sealing lips (8). Each group of elastic constraint members is annularly and uniformly distributed around the axial line of the limiting ring (1), the elastic constraint member comprises a first arc-shaped section (11), a second arc-shaped section (12) and a connecting section (13), the first arc-shaped section (11) and the second arc-shaped section (12) are respectively fixed at the two ends of the connecting section (13), and the connecting section (13) is elastic. A cavity (14) for mounting the elastic constraint member is formed in the annular body (7), a first abutting groove (15) and a second abutting groove (16) are arranged in the cavity (14), the first abutting groove (15) is located on the inner wall of the cavity (14) close to the sealing lip (8), the first arc-shaped section (11) abuts in the first abutting groove (15), the second abutting groove (16) is located on the inner wall of the cavity (14) away from the sealing lip (8), the connecting section (13) abuts in the second abutting groove (16), and the second arc-shaped section (12) abuts at the joint between the annular body (7) and the limiting ring (1). A limiting protrusion (17) is arranged on the outer side edge of the first abutting groove (15). The first ring body (4) is located on the inner side of the mounting groove (2), the second ring body (5) is located on the outer side of the mounting groove (2), a skirt (18) is fixed on the sealing lip (8) adjacent to the second ring body (5), and the skirt (18) extends into the gap between the second ring body (5) and the motor rotating shaft (22).

2. The waterproof structure of an electric motor oil seal for an electric vehicle according to claim 1, characterized in that, A convex edge (19) is fixed on the outer wall of the limiting ring (1), and the convex edge (19) is fixed on the motor end cover (21) through bolts.

3. The waterproof structure of an electric motor oil seal for an electric vehicle according to claim 2, characterized in that, A sealing gasket (20) is arranged between the inner wall of the mounting groove (2) and the limiting ring (1).

4. The waterproof structure of an electric motor oil seal for an electric vehicle according to claim 3, characterized in that, ​ 5. The waterproof structure of an electric motor of an electric vehicle according to claim 1, wherein ​ 6. The electric vehicle motor oil seal waterproof structure according to claim 1, characterized in that: ​ 7. The waterproof structure of an electric motor of an electric vehicle according to claim 1, wherein ​

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