Bearing for middle motor

Abstract

The utility model discloses a bearing for a centrally-mounted motor, which comprises an inner steel ring, an outer steel ring and a steel ball positioned between the inner steel ring and the outer steel ring, and is characterized in that a rubber cover is arranged on one side of the bearing exposed on the outer side of the centrally-mounted motor, a boss is arranged on the outer ring of the rubber cover, and the boss is embedded into an outer clamping groove of the outer steel ring; the inner ring of the rubber cover is provided with a first lip and a second lip; a limiting part is arranged on the inner steel ring, the inner ring of the rubber cover abuts against the limiting part, the first lip is tightly attached to the first end face of the inner steel ring, and the second lip is tightly attached to the second end face of the inner steel ring. Through the design of the boss on the outer ring of the rubber cover, the waterproof design between the rubber cover and the outer steel ring is realized, and through the design of the first lip and the second lip on the inner ring of the rubber cover, the dual waterproof design between the rubber cover and the inner steel ring is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings and relates to a bearing used for a central motor. Background Art

[0002] Mid-mounted motors play a key role in many electric vehicles and equipment. The stable rotation of their main shafts relies on bearings. In practical applications, mid-mounted motors often face complex and changing environmental conditions.

[0003] While the bearings used in existing mid-mounted motors can provide basic support for spindle rotation, they lack significant waterproofing. When electric vehicles travel through flooded roads or operate in a humid, splash-prone environment, moisture can easily intrude into the bearings. This not only dilutes and drains the lubricant within the bearings, compromising lubrication and increasing friction, but can also cause rust and corrosion on bearing components, reducing bearing life and accuracy, adversely affecting the proper operation of the mid-mounted motor and, ultimately, the entire device or vehicle. Therefore, improving the waterproofing of mid-mounted motor bearings is a critical issue that needs to be addressed. Utility Model Content

[0004] The purpose of the utility model is to provide a bearing for a mid-mounted motor, and to improve the waterproof performance of the bearing installed on the mid-mounted motor by improving the bearing structure.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A bearing for a mid-mounted motor, comprising an inner steel ring, an outer steel ring, and a steel ball located between the inner and outer steel rings, characterized in that a rubber cover is provided on one side of the bearing exposed outside the mid-mounted motor, the outer ring of the rubber cover having a boss, and the boss being embedded in an outer groove of the outer steel ring, the inner ring of the rubber cover having a first lip and a second lip; a limiting portion is provided on the inner steel ring, the inner ring of the rubber cover abuts against the limiting portion, the first lip is tightly fitted on the first end face of the inner steel ring, and the second lip is tightly fitted on the second end face of the inner steel ring.

[0007] As a further improvement of an embodiment of the present invention, a first gap is formed between the first lip, the second lip and the inner steel ring, and the first gap is filled with grease.

[0008] As a further improvement of an embodiment of the present invention, the rubber cover is composed of a steel plate and rubber coated on the steel plate, and the boss, the first lip and the second lip are all made of rubber.

[0009] As a further improvement of an embodiment of the present invention, the first lip is adjacent to the limiting portion and the root of the first lip contacts the upper edge corner of the limiting portion, so that a second gap is formed between the first lip and the limiting portion.

[0010] As a further improvement of an embodiment of the present invention, the second lip is an "L"-shaped bending structure, and the bottom foot of the second lip is pressed onto the second end surface.

[0011] As a further improvement of an embodiment of the present invention, the position of the limiting portion corresponds to the position of the external slot up and down, so that the inner side wall of the rubber cover installed on the bearing is in a vertical state.

[0012] As a further improvement of an embodiment of the present invention, the cross section of the outer card slot is a "concave" structure, and the height of the outer side of the outer card slot is lower than the height of the inner side thereof.

[0013] As a further improvement of an embodiment of the present invention, a shielding cover is provided on one side of the bearing located on the inner side of the central motor, and the shielding cover is made of iron material.

[0014] As a further improvement of an embodiment of the present invention, the outer ring of the shielding cover is embedded in the inner groove of the outer steel ring, and the inner ring of the shielding cover is slidably arranged on the inner steel ring.

[0015] As a further improvement of an embodiment of the present invention, the cross section of the inner card slot is a "concave" structure, and the height of the outer side of the inner card slot is lower than the height of the inner side thereof.

[0016] The above technical solution has the following beneficial effects: a waterproof design is achieved between the rubber cover and the outer steel ring through the design of the boss on the outer ring of the rubber cover, and a double waterproof design is achieved between the rubber cover and the inner steel ring through the design of the first lip and the second lip on the inner ring of the rubber cover. At the same time, the first gap between the first lip, the second lip and the inner steel ring is filled with grease. The grease has two functions, one is lubrication, and the other is that due to the hydrophobic properties of the grease, it can also play a mobile waterproof role, so that a triple waterproof design is achieved between the rubber cover and the inner steel ring. 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] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0019] Figure 1 This is a structural diagram provided by the utility model.

[0020] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle.

[0021] Figure 3 for Figure 1 Schematic diagram of the enlarged area B.

[0022] In the picture:

[0023] 1-Outer steel ring;

[0024] 2-inner steel ring; 21-limiting portion; 22-first end surface; 23-second end surface;

[0025] 3-Steel ball;

[0026] 4-rubber cover; 41-boss; 42-first lip; 43-second lip; 44-steel plate; 45-inner wall;

[0027] 5-Obstruction cover;

[0028] 6-First gap. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention. Example

[0032] See also Figure 1 As shown, a bearing for a mid-mounted motor is primarily responsible for supporting the rotation of the main shaft and ensuring the normal operation of the motor. Existing bearings for mid-mounted motors can meet basic support requirements. They are assembled from an inner steel ring 2, an outer steel ring 1, and a steel ball 3 located between them. This assembly method is known in the prior art.

[0033] However, these existing bearings have a significant drawback: insufficient water resistance. When a mid-mounted motor encounters waterlogging or humidity in real-world use, moisture can easily penetrate the bearings, causing a series of problems such as lubricant failure and component rust and corrosion, seriously impacting bearing life and motor operation.

[0034] Based on this, the present application proposes an improved bearing for a mid-mounted motor to enhance the waterproof performance of the bearing.

[0035] Figure 1 The inner side refers to the side that is located on the inner side of the mid-mounted motor after the bearing is installed on the mid-mounted motor; the outer side refers to the side that is exposed on the outer side of the mid-mounted motor after the bearing is installed on the mid-mounted motor.

[0036] like Figure 1 As shown, after the bearing is installed on the mid-mounted motor, a rubber cover 4 is provided on the side of the bearing exposed outside the mid-mounted motor. Figure 2 It can be seen more clearly that the rubber cover 4 is between the inner steel ring 2 and the outer steel ring 1. The outer ring of the rubber cover 4 has a boss 41, which can be accurately embedded in the outer groove of the outer steel ring 1, thereby achieving a stable position positioning of the rubber cover 4 and the outer steel ring 1.

[0037] Looking at the inner ring of the rubber cover 4, it features a first lip 42 and a second lip 43. A stopper 21 is also provided on the inner steel ring 2. When assembled, the inner ring of the rubber cover 4 abuts the stopper 21, with the first lip 42 tightly fitting against the first end face 22 of the inner steel ring 2, and the second lip 43 also fitting against the second end face 23 of the inner steel ring 2. This structural design effectively enhances the bearing's overall waterproof performance, making it more adaptable to the complex environment of a mid-mounted motor, reducing various failures caused by water ingress, extending the bearing's service life, and ensuring the stable operation of the mid-mounted motor.

[0038] The middle rubber cover 4 of the present invention is composed of a steel plate 44 and rubber covering the steel plate 44. This composite structure ensures both strength and flexibility. Furthermore, the boss 41, first lip 42, and second lip 43 are all made of rubber. The properties of rubber enhance the waterproof sealing function and improve the waterproof performance of the bearing.

[0039] Specifically, the first lip 42 is located close to the limiting portion 21, and its root is in close contact with the upper edge of the limiting portion 21. Such a layout allows a second gap to be cleverly formed between the first lip 42 and the limiting portion 21.

[0040] The second lip 43 is an L-shaped bent structure. When assembled, its base can be firmly pressed against the second end face 23, forming a tight fit. This structure can effectively enhance the sealing effect and improve the overall waterproof performance of the bearing.

[0041] In the optimized design of this bearing, the preferred solution is to align the position of the stopper 21 with the outer retaining groove. This allows the inner wall 45 of the rubber cover 4 to be vertical when installed on the bearing. This not only facilitates accurate installation and positioning of the rubber cover 4, but also ensures a more stable and effective waterproofing effect.

[0042] Of course, in this bearing design, the outer groove's cross-section exhibits a unique concave shape, with the outer side lower than the inner side. This ingenious design allows the boss 41 to fit more easily and securely into the outer groove during installation of the rubber cover 4, effectively ensuring accurate assembly of the rubber cover 4 and the outer steel ring 1 and enhancing overall structural stability. This structure also ensures a waterproof connection between the rubber cover 4 and the outer steel ring 1.

[0043] In the bearing structure involved in the present invention, a first gap 6 is formed between the first lip 42, the second lip 43 of the rubber cover 4 and the inner steel ring 2, and the first gap 6 is filled with grease. The above-mentioned grease plays two roles. On the one hand, it can provide a good lubrication effect. During the operation of the bearing, friction will be generated between the inner steel ring 2 and related components. The presence of grease can effectively reduce this friction, ensure the smooth operation of each component, and extend the service life of the bearing. On the other hand, grease has significant hydrophobic properties. When moisture that may exist in the outside world attempts to invade the interior of the bearing, the grease can form an effective barrier with its hydrophobic properties to prevent moisture from entering, thereby further enhancing the overall waterproof performance of the bearing, so that the bearing can work stably and reliably even in complex environments such as humidity.

[0044] Combine Figure 3 It can be clearly seen that a shielding cover 5 is specially provided on the bearing side located inside the central motor. The shielding cover 5 is made of iron material and mainly plays a dust-proof role.

[0045] In terms of specific installation, the outer ring of the shielding cover 5 is precisely embedded in the inner groove of the outer steel ring 1. The cross-section of this inner groove presents a "concave" structure, and the height of its outer side is significantly lower than the height of the inner side. This structural design allows the outer ring of the shielding cover 5 to be embedded more firmly and conveniently.

[0046] The inner ring of the shielding cover 5 slides onto the inner steel ring 2. This design not only ensures a tight fit between the shielding cover 5 and the bearing components, but also effectively blocks the intrusion of external dust due to its iron material without affecting the normal operation of the bearing, thereby better maintaining the internal environment of the bearing and extending its service life. Furthermore, the shielding cover 5 does not add any additional resistance to the bearing's operation during operation.

[0047] The utility model aims at improving the bearing of a central motor, and enhances the waterproof performance of the existing bearing, so that the outer side of the bearing is waterproof and the inner side is dustproof.

[0048] First, the outer ring of the rubber cover 4 is provided with a boss 41, which can be accurately embedded in the outer slot of the outer steel ring 1, thereby realizing a waterproof design between the rubber cover 4 and the outer steel ring 1, effectively preventing the intrusion of external moisture.

[0049] Furthermore, the first lip 42 and the second lip 43 of the inner ring of the rubber cover 4 are designed to fit closely to different end surfaces of the inner steel ring 2, thereby achieving a double waterproof effect between the rubber cover 4 and the inner steel ring 2.

[0050] Furthermore, the first gap 6 between the first and second lips 42, 43, and the inner steel ring 2 is filled with grease. This grease not only lubricates the bearing during operation, reducing friction loss, but also, thanks to its hydrophobic properties, further enhances waterproofing. This creates a triple waterproof design between the rubber cover and the inner steel ring, comprehensively ensuring the bearing's excellent performance in complex environments.

[0051] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0053] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bearing for a mid-mounted motor, comprising an inner steel ring, an outer steel ring, and a steel ball located between the inner and outer steel rings, characterized in that: A rubber cover is provided on one side of the bearing exposed on the outside of the central motor, the outer ring of the rubber cover has a boss and the boss is embedded in the outer groove of the outer steel ring, the inner ring of the rubber cover has a first lip and a second lip; a limiting portion is provided on the inner steel ring, the inner ring of the rubber cover abuts against the limiting portion, the first lip is tightly fitted on the first end face of the inner steel ring, and the second lip is tightly fitted on the second end face of the inner steel ring.

2. The bearing according to claim 1, characterized in that: A first gap is formed between the first lip, the second lip and the inner steel ring, and the first gap is filled with grease.

3. The bearing according to claim 2, characterized in that: The rubber cover is composed of a steel plate and rubber coated on the steel plate, and the boss, the first lip and the second lip are all made of rubber.

4. The bearing according to claim 3, characterized in that: The first lip is adjacent to the limiting portion and the root of the first lip contacts the upper edge of the limiting portion, so that a second gap is formed between the first lip and the limiting portion.

5. The bearing according to claim 3, characterized in that: The second lip is an L-shaped bent structure, and the bottom foot of the second lip is pressed onto the second end surface.

6. The bearing according to claim 3, characterized in that: The position of the limiting portion corresponds to that of the external slot, so that the inner side wall of the rubber cover installed on the bearing is in a vertical state.

7. The bearing according to claim 1, characterized in that: The cross section of the outer card slot is a "concave" structure, and the height of the outer side of the outer card slot is lower than the height of the inner side thereof.

8. The bearing according to any one of claims 1 to 7, characterized in that: A shielding cover is provided on one side of the bearing located on the inner side of the central motor.

9. The bearing according to claim 8, characterized in that: The outer ring of the shielding cover is embedded in the inner groove of the outer steel ring, and the inner ring of the shielding cover is slidably arranged on the inner steel ring.

10. The bearing according to claim 9, characterized in that: The cross section of the inner card slot is a "concave" structure, and the height of the outer side of the inner card slot is lower than the height of the inner side.

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