Bearing for middle motor

Abstract

The bearing comprises an inner steel ring, an outer steel ring and a steel ball located 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 middle 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 invention belongs to the technical field of bearings and relates to a bearing used on a mid-mounted motor. Background Art

[0002] Mid-mounted motors play a key role in many electric vehicles and equipment. The stable rotation of their main shafts depends on bearing support. In actual application scenarios, mid-mounted motors often face complex and changing environmental conditions.

[0003] Although the bearings equipped with existing mid-mounted motors can meet the basic function of supporting the rotation of the main shaft, they are obviously insufficient in terms of waterproof performance. When electric vehicles travel through flooded sections of road, or when the equipment is in a humid, splash-prone working environment, water can easily invade the inside of the bearings. This will not only cause the lubricating grease inside the bearings to be diluted and lost, affecting the lubrication effect and increasing friction losses, but may also cause problems such as rust and corrosion of bearing components, thereby reducing the service life and working accuracy of the bearings, and adversely affecting the normal operation of the mid-mounted motor and even the entire equipment or vehicle. Therefore, improving the waterproofness of the mid-mounted motor bearings has become an important issue that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention 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 objective of the present invention is achieved through the following technical solutions: A bearing for a mid-mounted motor, comprising an inner steel ring, an outer steel ring and a steel ball located between the inner steel ring and the outer steel ring, characterized in that a rubber cover is provided on one side of the bearing exposed on the outside of the mid-mounted motor, the outer ring of the rubber cover has a boss and the boss is embedded in an outer groove of the outer steel ring, and 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.

[0006] 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.

[0007] 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.

[0008] 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 is in contact with the upper edge of the limiting portion, so that a second gap is formed between the first lip and the limiting portion.

[0009] As a further improvement of an embodiment of the present invention, the second lip is in an "L"-shaped bending structure, and the bottom foot of the second lip is pressed onto the second end surface.

[0010] 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 in the vertical direction, so that the inner side wall of the rubber cover installed on the bearing is in a vertical state.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] The adoption of the above technical scheme has the following beneficial effects: a waterproof design between the rubber cover and the outer steel ring is achieved through the design of the boss on the outer ring of the rubber cover, and a double waterproof design between the rubber cover and the inner steel ring is achieved 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

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0018] Figure 1 A schematic diagram of the structure provided by the present invention.

[0019] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle.

[0020] Figure 3 for Figure 1 A magnified schematic diagram of area B.

[0021] In the figure: 1-Outer steel ring; 2-inner steel ring; 21-limiting portion; 22-first end surface; 23-second end surface; 3-Steel ball; 4-rubber cover; 41-boss; 42-first lip; 43-second lip; 44-steel plate; 45-inner wall; 5- shield cover; 6-First gap. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present 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.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0024] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; 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-mentioned directional words are not used to limit the present invention. Example

[0025] See also Figure 1As shown, a bearing for a mid-mounted motor is mainly responsible for supporting the rotation of the main shaft and ensuring the normal operation of the motor. The existing bearing on the mid-mounted motor can meet the requirements in terms of basic supporting functions. It is assembled by an inner steel ring 2, an outer steel ring 1 and a steel ball 3 located between the two. This assembly method belongs to the known prior art.

[0026] However, these existing bearings have an obvious defect, namely, insufficient waterproofness. When the mid-mounted motor encounters water accumulation, humidity and other conditions in actual use scenarios, water can easily penetrate into the bearing, causing a series of problems such as lubricant failure, component rust and corrosion, seriously affecting the bearing life and motor operation.

[0027] Based on this, the present application proposes an improved bearing for a mid-mounted motor to enhance the waterproof performance of the bearing.

[0028] 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.

[0029] 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 card slot of the outer steel ring 1, so as to achieve a stable position positioning of the rubber cover 4 and the outer steel ring 1.

[0030] Looking at the inner ring of the rubber cover 4, it has a first lip 42 and a second lip 43, and a limiter 21 is provided on the inner steel ring 2. When the assembly is completed, the inner ring of the rubber cover 4 will abut against the limiter 21, the first lip 42 can fit tightly on the first end face 22 of the inner steel ring 2, and the second lip 43 will also fit on the second end face 23 of the inner steel ring 2. Through such a structural design, the overall waterproof performance of the bearing is effectively improved, so that it can better adapt to the complex environment of the mid-mounted motor, reduce various faults caused by water ingress, extend the service life of the bearing, and ensure the stable operation of the mid-mounted motor.

[0031] In the present invention, the rubber cover 4 is composed of a steel plate 44 and rubber coated on the steel plate 44. This composite structure can ensure a certain strength and good flexibility. The boss 41, the first lip 42 and the second lip 43 are all composed of rubber. The characteristics of rubber can better achieve the sealing and waterproofing function and improve the waterproof performance of the bearing.

[0032] Specifically, the first lip 42 is located near 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.

[0033] The second lip 43 is an "L"-shaped bending structure. When assembled, its foot can be firmly pressed on the second end surface 23 to form a tightly fitting state. This structure can effectively enhance the sealing effect and improve the overall waterproof performance of the bearing.

[0034] In the optimized design of the bearing, the preferred solution is to make the position of the limit portion 21 correspond to the position of the outer slot. In this way, when the rubber cover 4 is installed on the bearing, its inner wall 45 can be in a vertical state. This is not only conducive to the accurate installation and positioning of the rubber cover 4, but also ensures that it can play a more stable and effective role in waterproofing and other aspects.

[0035] Of course, in the design of the bearing, the cross section of the outer slot presents a unique "concave" structure, and its outer height is lower than the inner height. This design is very clever. When installing the rubber cover 4, the boss 41 can be embedded in it more conveniently and firmly, effectively ensuring the accurate assembly of the rubber cover 4 and the outer steel ring 1, and improving the overall structural stability. At the same time, the above structure also realizes the waterproof design between the rubber cover 4 and the outer steel ring 1.

[0036] 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 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 block the entry of moisture, 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.

[0037] Combination Figure 3 It can be clearly seen that a shielding cover 5 is specially provided on one side of the bearing located inside the central motor. The shielding cover 5 is made of iron material and mainly plays a dustproof role.

[0038] 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 the inner groove presents a "concave" structure, and the height of the 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 more firmly and conveniently embedded therein.

[0039] At the same time, the inner ring of the shielding cover 5 is slidably arranged on the inner steel ring 2. Such a design not only ensures the close cooperation between the shielding cover 5 and the various components of the bearing, but also effectively blocks the intrusion of external dust by virtue of its iron material without affecting the normal operation of the bearing, thereby better maintaining the internal environment of the bearing and extending the service life of the bearing. At the same time, the shielding cover 5 does not increase the additional resistance of the bearing operation during the use of the bearing.

[0040] The present invention 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.

[0041] Firstly, 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, so as to realize a waterproof design between the rubber cover 4 and the outer steel ring 1, and effectively prevent the intrusion of external moisture.

[0042] Furthermore, the first lip 42 and the second lip 43 of the inner ring of the rubber cover 4 are designed to closely fit different end surfaces of the inner steel ring 2, respectively, so as to achieve a double waterproof effect between the rubber cover 4 and the inner steel ring 2.

[0043] Moreover, the first gap 6 between the first lip 42, the second lip 43 and the inner steel ring 2 is filled with grease. The grease can not only play a lubricating role when the bearing is running, reducing friction loss, but also further enhance waterproofing with its hydrophobic properties, forming a triple waterproof design between the rubber cover and the inner steel ring, and comprehensively guaranteeing the good performance of the bearing in complex environments.

[0044] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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.

[0045] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 steel ring and the outer steel ring, 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 bending 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 part corresponds to the position of the outer slot up and down, 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 arranged 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 thereof.

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