Gasket, motor and vehicle

Abstract

The utility model provides a gasket, motor, vehicle, wherein the gasket comprises a hard part and an elastic sleeve body, the hard part comprises a peripheral side wall, the elastic sleeve body is located at the radial inner side of the peripheral side wall, the height of the elastic sleeve body is greater than the height of the peripheral side wall along the axial direction of the gasket, and a gap is arranged between the elastic sleeve body and the peripheral side wall along the radial direction of the gasket. According to the utility model, when the gasket is applied to the motor, the gasket is sleeved on the bolt, and the bolt locks the front end cover of the motor and the bearing baffle, the head of the bolt applies force to the elastic sleeve body, so that the elastic sleeve body is pressed to deform and fills the original gap between the elastic sleeve body and the peripheral side wall; and meanwhile, the elastic sleeve body is tightly sleeved on the screw rod of the bolt, so that good sealing is formed at the joint of the bolt and the front end cover. Therefore, insulation paste does not need to be coated on the bearing baffle for sealing, and when the motor is provided with the gasket and has a water leakage fault and needs to be overhauled, only the gasket needs to be directly replaced, so that the motor is very convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a gasket, a motor and a vehicle. Background Art

[0002] As the power output component of new energy vehicles, the main drive motor is one of their most core components. Not only must its electromagnetic performance meet the vehicle's torque requirements, but it must also ensure stable operation in diverse road conditions, such as rain, sandstorms, and flooded roads. Therefore, the drive motor's sealing performance must generally meet IP67 or IP68 standards.

[0003] China's urban road conditions are relatively complex. In order to limit the impact of the motor rotor caused by the axial force generated by vehicle vibration and motor axial leakage resistance during driving, large-scale automobile main drive motors often use bearing baffles to limit the axial movement of the motor rotor. The bearing baffle is locked on the front cover by bolts, such as Figure 5 Currently, the method commonly used to seal the connection between the baffle and the front cover, as well as the baffle and the bolts, is to apply insulating glue on the baffle. However, this method has limited sealing performance and is prone to seal failure in motors that have been running for a long time. During maintenance, the motor needs to be disassembled to reapply the glue, which is quite troublesome. Utility Model Content

[0004] Therefore, the utility model provides a gasket that can solve the technical problem that the sealing method of applying insulating glue on the bearing baffle is prone to sealing failure for motors that run for a long time, and the motor needs to be disassembled for glue repair during maintenance, which is quite troublesome.

[0005] In order to solve the above problems, the utility model provides a gasket, comprising a hard part and an elastic sleeve, the hard part comprising a circumferential side wall, the elastic sleeve being located radially inward of the circumferential side wall, and along the axial direction of the gasket, the height of the elastic sleeve being greater than the height of the circumferential side wall, and along the radial direction of the gasket, there is a gap between the elastic sleeve and the circumferential side wall.

[0006] In some embodiments, the hard part also includes an end wall, the circumferential side wall and the elastic sleeve are both located on the end wall, and the circumferential side wall and the elastic sleeve are located on the same side, a through hole is constructed on the end wall that passes through the end wall, the elastic sleeve has a channel, and the through hole is connected to the channel.

[0007] In some embodiments, the elastic sleeve is fixed to the end wall.

[0008] In some embodiments, the peripheral side wall has a first axis, the elastic sleeve has a second axis, the through hole has a third axis, and the first axis, the second axis, and the third axis coincide with each other.

[0009] In some embodiments, the elastic sleeve has a first sleeve segment located inside the hard part and a second sleeve segment located outside the hard part, the circumferential side wall has a first axis, and the distance between the inner annular surface of the circumferential side wall and the first axis gradually increases in the direction from the first sleeve segment to the second sleeve segment.

[0010] In some embodiments, along the radial direction of the gasket, the minimum wall thickness of the circumferential side wall is H1, the wall thickness of the elastic sleeve is H2, and 1.2≤H2 / H1≤2.

[0011] The utility model also provides a motor, comprising the aforementioned gasket.

[0012] In some embodiments, the motor further includes an end cover, a bearing baffle and a bolt, the end cover is constructed with a countersunk hole, the bottom wall of the countersunk hole is constructed with a first threaded hole, the countersunk hole and the first threaded hole are combined to pass through the end cover, the bearing baffle is constructed with a second threaded hole, the screw of the bolt is simultaneously threadedly connected in the first threaded hole and the second threaded hole, and the gasket is clamped between the head of the bolt and the bottom wall of the countersunk hole.

[0013] In some embodiments, when the hard portion further includes an end wall, the elastic sleeve is clamped between the end wall and the head of the bolt.

[0014] The utility model also provides a vehicle, comprising the aforementioned motor.

[0015] The utility model provides a gasket, a motor, and a vehicle, which have the following beneficial effects:

[0016] When the gasket of the present application is applied to a motor and is fitted onto a bolt, when the bolt secures the front end cover and bearing plate of the motor, the gasket is clamped between the head of the bolt and the front end cover. Because the gasket comprises a hard circumferential sidewall and an elastic sleeve, and the elastic sleeve is taller than the circumferential sidewall along the axial direction of the gasket, and a gap exists between the elastic sleeve and the circumferential sidewall along the radial direction of the gasket, when the bolt secures the front end cover and bearing plate, the head of the bolt applies force to the elastic sleeve, causing the elastic sleeve to deform under pressure and fill the existing gap between the elastic sleeve and the circumferential sidewall. Simultaneously, the elastic sleeve is tightly fitted onto the bolt's screw, thereby forming a good seal between the bolt and the front end cover, and between the bolt and the gasket, and thus, the motor. This eliminates the need to apply insulating adhesive to the bearing plate for sealing, thereby reducing the process flow. Furthermore, when a motor leaks at the gasket location and requires repair, the gasket can be replaced directly without disassembling the machine and reapplying adhesive, which is very convenient and reduces the difficulty of repair. It can be understood that after the head of the bolt abuts against the peripheral side wall of the hard part, the bolt is tightened into place, and at this time the hard peripheral side wall provides good support for the head of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0018] Figure 1 A cross-sectional view of a gasket according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic structural diagram of a gasket according to an embodiment of the present utility model;

[0020] Figure 3 A partial schematic diagram of a motor according to an embodiment of the present invention;

[0021] Figure 4 for Figure 3 An enlarged schematic diagram of point A of the motor of the embodiment of the present utility model;

[0022] Figure 5 It is a partial schematic diagram of a motor in the prior art.

[0023] The reference numerals indicate:

[0024] 1. Elastic sleeve; 2. Circumferential side wall; 3. Through hole; 4. Channel; 5. End wall; 6. End cover; 7. Bearing baffle; 8. Bolt; 9. Rotating shaft; 10. Bearing. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0029] See also Figures 1 to 4As shown, according to an embodiment of the present invention, a gasket is provided, comprising a hard part and an elastic sleeve 1, the hard part comprising a circumferential side wall 2, the elastic sleeve 1 being nested on the radial inner side of the circumferential side wall 2, along the axial direction of the gasket, the height of the elastic sleeve 1 is greater than the height of the circumferential side wall 2, and along the radial direction of the gasket, there is a gap between the elastic sleeve 1 and the circumferential side wall 2.

[0030] In this technical solution, when the gasket of the present application is applied to a motor and is mounted on a bolt 8, and the bolt 8 locks the front end cover and the bearing plate 7 of the motor, the gasket is clamped between the head of the bolt 8 and the front end cover. Because the gasket includes a hard peripheral side wall 2 and an elastic sleeve 1, and the elastic sleeve 1 is taller than the peripheral side wall 2 in the axial direction of the gasket, and there is a gap between the elastic sleeve 1 and the peripheral side wall 2 in the radial direction of the gasket, when the bolt 8 locks the front end cover and the bearing plate 7, the head of the bolt 8 applies force to the elastic sleeve 1, causing the elastic sleeve 1 to deform under pressure and fill the original gap between the elastic sleeve 1 and the peripheral side wall 2. At the same time, the elastic sleeve 1 is tightly mounted on the screw of the bolt 8, thereby forming a good seal between the connection between the bolt 8 and the front end cover and between the bolt 8 and the gasket, thereby forming a good seal for the motor and strengthening the connection strength. This eliminates the need to apply insulating glue to the bearing plate 7 for sealing, thereby reducing the process flow. Furthermore, if a water leak occurs at the gasket location and requires repair, the gasket can be replaced directly without disassembling the machine and reapplying glue, which is very convenient and reduces the difficulty of repair. It is understood that after the head of the bolt 8 abuts against the peripheral side wall 2 of the hard portion, the bolt 8 is tightened into place, and the hard peripheral side wall 2 now provides good support for the head of the bolt 8. The elastic sleeve 1 can be a rubber ring made of fluororubber or a soft rubber material, while the hard portion can be made of a metal material such as high manganese steel.

[0031] See also Figure 1 、 Figure 3 and Figure 4 As shown, the hard part also includes an end wall 5, the circumferential side wall 2 and the elastic sleeve 1 are both located on the end wall 5, and the circumferential side wall 2 and the elastic sleeve 1 are located on the same side. A through hole 3 is constructed on the end wall 5 and passes through the end wall 5. The elastic sleeve 1 has a channel 4, and the through hole 3 is connected to the channel 4.

[0032] In this embodiment, when the gasket is fitted over the shank of bolt 8, the shank of bolt 8 passes through the channel 4 of the elastic sleeve 1 and the through-hole 3 of the end wall 5, respectively. By designing the hard portion to also include the end wall 5, and positioning the elastic sleeve 1 on the end wall 5, when the head of bolt 8 presses against the elastic sleeve 1, the head of bolt 8 and the end wall 5 together clamp the elastic sleeve 1. This allows the elastic sleeve 1 to deform easily under the clamping force of the two hard structures, achieving a sealing effect. The hard portion is integrally formed from the end wall 5 and the peripheral sidewall 2.

[0033] As a specific embodiment, the elastic sleeve 1 is fixed on the end wall 5, so that the elastic sleeve 1 and the hard part can be integrated and not easily separated or lost.

[0034] See also Figure 1 As shown, the circumferential sidewall 2 has a first axis, the elastic sleeve 1 has a second axis, and the through-hole 3 has a third axis, and the first, second, and third axes coincide. That is, the circumferential sidewall 2, the elastic sleeve 1, and the through-hole 3 are coaxially arranged, forming a uniform gap between the elastic sleeve 1 and the circumferential sidewall 2. When the bolt 8 passes through the channel 4 and the through-hole 3 and applies pressure to the elastic sleeve 1, the elastic sleeve 1 expands uniformly in the radial direction after being compressed, thereby forming a better seal for the uniform gap and a better seal between the elastic sleeve 1 and the bolt 8.

[0035] See also Figure 1 and Figure 4 As shown, the elastic sleeve 1 has a first sleeve segment located inside the hard part and a second sleeve segment located outside the hard part, the circumferential side wall 2 has a first axis, and the distance between the inner annular surface of the circumferential side wall 2 and the first axis gradually increases from the first sleeve segment to the second sleeve segment.

[0036] In this technical solution, the distance between the inner annular surface of the circumferential side wall 2 and the first axis gradually increases from the first sleeve segment to the second sleeve segment, indicating that the inner annular surface of the circumferential side wall 2 is flared. During the process of tightening the elastic sleeve 1 with the bolt 8, the elastic sleeve 1 begins to deform as a whole in the axial direction. When the inner annular surface of the circumferential side wall 2 is flared, it is ensured that the end of the elastic sleeve 1 in contact with the end wall 5 first contacts the inner annular surface of the circumferential side wall 2 after deformation. As the tightening force of the bolt 8 increases, the end of the elastic sleeve 1 away from the end wall 5 contacts the inner annular surface of the circumferential side wall 2 as the deformation increases. This ensures that there is no excess space in the gap between the elastic sleeve 1 and the circumferential side wall 2, further improving the sealing effect.

[0037] As a specific embodiment, along the radial direction of the gasket, the minimum wall thickness of the circumferential side wall 2 is H1, the wall thickness of the elastic sleeve 1 is H2, and 1.2≤H2 / H1≤2. Such a design can ensure that the elastic sleeve 1 has a certain thickness relative to the circumferential side wall 2 of the hard part, so that the elastic sleeve 1 will not tear after being compressed due to being too thin, thereby affecting the sealing effect. It is understandable that because the inner annular surface of the circumferential side wall 2 is flared, the wall thickness of the circumferential side wall 2 gradually changes. Therefore, this application uses the wall thickness of the elastic sleeve 1 and the minimum wall thickness of the circumferential side wall 2 for comparison to design an elastic sleeve 1 with a reasonable wall thickness.

[0038] The utility model also provides a motor, comprising the aforementioned gasket.

[0039] See also Figure 3 and Figure 4 As shown, the motor also includes an end cover 6, a bearing baffle 7 and a bolt 8. A countersunk hole is constructed on the end cover 6, and a first threaded hole is constructed on the bottom wall of the countersunk hole. The countersunk hole and the first threaded hole are combined to pass through the end cover 6. A second threaded hole is constructed on the bearing baffle 7. The screw of the bolt 8 is threadedly connected to the first threaded hole and the second threaded hole at the same time, and the gasket is clamped between the head of the bolt 8 and the bottom wall of the countersunk hole.

[0040] In this embodiment, the use of a gasket to seal the motor eliminates the need to apply insulating adhesive to the bearing baffle 7 for sealing. When the motor leaks at the gasket location and requires repair, the gasket can be replaced directly without disassembling the motor and reapplying adhesive, which is very convenient and reduces the difficulty of repair. It should be noted that the end cover 6 in this application specifically refers to the front end cover of the motor, and the bearing baffle 7 specifically refers to the front bearing baffle of the motor.

[0041] See also Figure 4As shown, the elastic sleeve 1 is clamped between the end wall 5 and the head of the bolt 8. Specifically, after the gasket is placed over the shank of the bolt 8, the end of the elastic sleeve 1 facing away from the hard portion faces the head of the bolt 8. As the shank of the bolt 8 is inserted into the first and second threaded holes to securely fasten the end cap 6 and the bearing plate 7, the end wall 5 of the hard portion abuts the bottom wall of the countersunk hole, securing the gasket and facilitating tightening of the bolt 8. However, when the gasket is installed in reverse, the end of the elastic sleeve 1 facing away from the hard portion abuts the bottom wall of the countersunk hole. Because the outer diameter of the elastic sleeve 1 is smaller than that of the circumferential wall 2 of the hard portion and the elasticity of the elastic sleeve 1, the gasket is prone to deflection when in reverse installation, resulting in increased effort when tightening the bolt 8 and a poor gasket seal. This is precisely to address these issues, so after the gasket is placed over the shank of the bolt 8, the end of the elastic sleeve 1 facing away from the hard portion faces the head of the bolt 8. It is understood that once the head of bolt 8 abuts the peripheral sidewall 2 of the hard portion, bolt 8 is properly tightened, and the elastic sleeve 1 is completely compressed within the hard portion. Furthermore, once bolt 8 is properly tightened, even motor vibration will not cause relative impact or displacement between bolt 8 and gasket, resulting in a good sealing effect.

[0042] It should also be noted that the motor also includes a rotating shaft 9 and a bearing 10. The bearing 10 is mounted on the rotating shaft 9. The end cover 6 has a bearing chamber in which the bearing 10 is located. The bearing baffle 7 is used to restrain the bearing 10, thereby limiting axial displacement of the motor rotor caused by vibration, axial magnetic leakage, etc. The bearing 10 specifically refers to the front bearing of the motor.

[0043] The present invention also provides a vehicle, comprising the aforementioned motor. The vehicle of the present application particularly refers to a new energy vehicle.

[0044] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are only preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and variations can be made without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A gasket, characterized in that: The invention comprises a hard part and an elastic sleeve (1), wherein the hard part comprises a circumferential side wall (2), and the elastic sleeve (1) is nested and arranged radially inward of the circumferential side wall (2). Along the axial direction of the gasket, the height of the elastic sleeve (1) is greater than the height of the circumferential side wall (2), and along the radial direction of the gasket, there is a gap between the elastic sleeve (1) and the circumferential side wall (2).

2. The gasket according to claim 1, characterized in that The hard part further comprises an end wall (5), the circumferential side wall (2) and the elastic sleeve (1) are both located on the end wall (5), and the circumferential side wall (2) and the elastic sleeve (1) are located on the same side, a through hole (3) penetrating the end wall (5) is constructed on the end wall (5), the elastic sleeve (1) has a channel (4), and the through hole (3) is connected to the channel (4).

3. The gasket according to claim 2, characterized in that The elastic sleeve (1) is fixed on the end wall (5).

4. The gasket according to claim 2, characterized in that The peripheral side wall (2) has a first axis, the elastic sleeve (1) has a second axis, the through hole (3) has a third axis, and the first axis, the second axis, and the third axis coincide with each other.

5. The gasket according to claim 1, wherein The elastic sleeve (1) has a first sleeve section located inside the hard part and a second sleeve section located outside the hard part, the peripheral side wall (2) has a first axis, and the distance between the inner annular surface of the peripheral side wall (2) and the first axis gradually increases in the direction from the first sleeve section to the second sleeve section.

6. The gasket according to claim 1, wherein Along the radial direction of the gasket, the minimum wall thickness of the peripheral side wall (2) is H1, the wall thickness of the elastic sleeve (1) is H2, and 1.2≤H2 / H1≤2.

7. A motor, characterized in that: A gasket comprising the gasket according to any one of claims 1 to 6.

8. The motor according to claim 7, characterized in that The invention also includes an end cover (6), a bearing baffle (7) and a bolt (8), wherein the end cover (6) is provided with a countersunk hole, the bottom wall of the countersunk hole is provided with a first threaded hole, the countersunk hole and the first threaded hole are combined to pass through the end cover (6), the bearing baffle (7) is provided with a second threaded hole, the screw of the bolt (8) is simultaneously threadedly connected in the first threaded hole and the second threaded hole, and the gasket is clamped between the head of the bolt (8) and the bottom wall of the countersunk hole.

9. The motor according to claim 8, characterized in that When the hard part further includes an end wall (5), the elastic sleeve (1) is clamped between the end wall (5) and the head of the bolt (8).

10. A vehicle, comprising the motor according to any one of claims 7 to 9.

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