Low-friction hub bearing sealing ring

Abstract

The utility model relates to the technical field of hub bearing sealing rings, in particular to a low-friction hub bearing sealing ring which comprises a fixing framework and a water retaining ring which are installed on an outer ring and an inner ring of a bearing respectively and arranged oppositely, and further comprises a first rubber sleeve wrapping the fixing framework. The first rubber sleeve is provided with a sealing lip extending towards the side where the water retaining ring is located in the axial direction of the fixing framework, and the end of the sealing lip abuts against the water retaining ring. According to the water retaining ring, the design of a low-friction single sealing lip is adopted, and the water retaining ring has the effect of high sealing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hub bearing sealing rings, in particular to a low-friction hub bearing sealing ring. BACKGROUND

[0002] In the field of modern motor vehicles and industrial machinery, the hub bearing unit, as a key mechanical component connecting the vehicle body and the tire, is of great importance in terms of performance stability and environmental adaptability.

[0003] This component is exposed to complex working conditions for a long time, not only needs to withstand the thermal load generated by dynamic load and continuous friction, but also needs to resist the erosion of road mud, splashing water and particulate matter. To ensure sealing efficiency, the traditional design builds multiple protective layers by increasing the number of sealing lips. Although this strengthening measure can resist harsh environments to some extent, the contact area and sliding friction between the rolling body and the sealing lip increase significantly with the increase in the number of sealing lips.

[0004] Under the background of accelerating global carbon neutralization, the energy efficiency optimization of mechanical transmission systems has become a core issue in industrial manufacturing. According to the first law of thermodynamics, the mechanical energy loss caused by bearing friction will be directly converted into heat energy dissipated to the environment, which not only increases the output energy consumption of the power device, but also directly affects the achievement of the whole machine carbon emission index. As a key node in the power transmission path of the vehicle, the friction torque of the hub bearing can be significantly improved by reducing the energy efficiency of the whole vehicle by 1%. Therefore, low-friction bearings, due to their potential in reducing energy loss and improving energy efficiency, have become one of the key technologies to achieve these goals, and the demand is increasing. CONTENT OF THE INVENTION

[0005] To solve the above problems, the present application provides a low-friction hub bearing sealing ring.

[0006] The low-friction hub bearing sealing ring provided by the present application adopts the following technical scheme:

[0007] A low-friction hub bearing sealing ring, comprising a fixed framework and a water baffle ring respectively mounted on the outer ring and the inner ring of the bearing, the fixed framework and the water baffle ring are oppositely arranged, further comprising a first rubber sleeve wrapped around the fixed framework, the first rubber sleeve is provided with a sealing lip extending along the axial direction of the fixed framework to the side where the water baffle ring is located, and the end of the sealing lip is arranged against the water baffle ring; the end of the sealing lip is bent towards the direction of the water baffle ring to form a lip head.

[0008] In one embodiment, the first rubber sleeve is provided with an oil-proof lip, the oil-proof lip extends in the radial direction of the fixed framework and is arranged in a gap with the water baffle ring; the oil-proof lip is arranged inclinedly along the axial direction of the inner side of the bearing.

[0009] In one of the embodiments, the outer edge of the water blocking ring is provided with a water guide ring extending along the axial direction of the water blocking ring, and the water guide ring is arranged towards the direction of the skeleton.

[0010] In one of the embodiments, the water guide ring is arranged obliquely away from the axial center of the water blocking ring from one end to the other end connected with the water blocking ring.

[0011] In one of the embodiments, the end of the water blocking ring away from the axial center is provided with an arc segment, and the arc segment is arranged in an arc shape towards the direction of the fixed skeleton.

[0012] In one of the embodiments, the lip head is arranged on the arc segment.

[0013] In one of the embodiments, the end surface of the first rubber sleeve towards the axial center of the fixed skeleton is a guide inclined surface, and the guide inclined surface is inclined away from the axial center along the extension direction of the sealing lip.

[0014] In one of the embodiments, the end of the sealing lip connected with the first rubber sleeve is sleeved with a spring ring.

[0015] In one of the embodiments, the water blocking ring is wrapped with a second rubber sleeve.

[0016] In summary, the present application has the following beneficial effects:

[0017] 1. The structure design of one sealing lip effectively reduces friction;

[0018] 2. The design of the bent lip head improves the sealing effect of the sealing lip;

[0019] 3. The design of the water blocking ring and the arc structure, in cooperation, forms centrifugal force which can guide the flow of liquid and quickly discharge the mud penetrating into the sealing area. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of embodiment one;

[0021] Figure 2 is a structural schematic diagram of embodiment two;

[0022] Figure 3 is a structural schematic diagram of embodiment three;

[0023] Figure 4 is a structural schematic diagram of embodiment four.

[0024] In the figure, 10, bearing inner ring; 20, bearing outer ring; 100, fixed skeleton; 200, water retaining ring; 210, water guide ring; 220, arc segment; 300, first rubber sleeve; 310, guide slope; 400, second rubber sleeve; 500, sealing lip; 510, lip head; 600, spring ring. DETAILED DESCRIPTION

[0025] The application will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] Embodiment 1: a low-friction hub bearing sealing ring, as shown in the figure, comprising a fixed skeleton 100, a water retaining ring 200, a first rubber sleeve 300 and a second rubber sleeve 400, the cross section of the fixed skeleton 100 is L-shaped and is installed on the bearing outer ring 20, and the water retaining ring 200 is installed on the bearing inner ring 10. Figure 1

[0028] The fixed skeleton 100 and the water retaining ring 200 are oppositely arranged. The first rubber sleeve 300 is wrapped around the fixed skeleton 100, and the second rubber sleeve 400 is wrapped around the water retaining ring 200. It should be noted that the second rubber sleeve 400 is included on the side of the water retaining ring 200 facing the bearing outer side.

[0029] A sealing lip 500 and an oil-proof lip are provided on the rubber sleeve.

[0030] The sealing lip 500 extends along the fixed skeleton 100 in the axial direction to the side where the water retaining ring 200 is located, and the end of the sealing lip 500 abuts against the water retaining ring 200. The end of the sealing lip 500 is bent towards the direction of the water retaining ring 200 to form a lip head 510. The position where the water retaining ring 200 and the lip head 510 abut against each other is arranged along the optical axis, and the smoother this position is, the smaller the corresponding friction will be.

[0031] The oil-proof lip extends in the radial direction of the fixed skeleton 100 and is arranged with a gap between the water retaining ring 200; the oil-proof lip is arranged obliquely in the axial direction towards the inner side of the bearing. The design of the oil-proof lip is mainly used to enable lubricating oil to enter the area surrounded by the sealing lip 500 and the water retaining ring 200, so as to provide lubrication at the lip head 510 and further reduce the friction.

[0032] At the same time, the gap design can prevent too much lubricating oil from entering the area surrounded by the sealing lip 500 and the water retaining ring 200, affecting the sealing effect. ​

[0033] The outer edge of the water-blocking ring 200 is provided with a water-guiding ring 210 extending along the axial direction of the water-blocking ring 200, and the water-guiding ring 210 is arranged towards the skeleton.

[0034] In addition, for easier drainage, the end face of the first rubber sleeve 300 facing the axis of the fixed frame 100 is a guide slope 310, and the guide slope 310 is inclined away from the axis along the extension direction of the sealing lip 500.

[0035] Example 2: Figure 2 As shown, the difference from Embodiment 1 is that the water guide ring 210 is inclined away from the axis of the water baffle ring 200 from one end connected to the water baffle ring 200 to the other end. By being inclined, better guidance can be formed during drainage, thus facilitating drainage.

[0036] Example 3: As Figure 3 As shown, the difference from Embodiment 1 is that the end of the water-retaining ring 200 away from the axis is provided with an arc-shaped segment 220, which is arranged in an arc shape towards the fixed frame 100. By setting the arc-shaped segment 220, better guidance can be formed during drainage, thus facilitating drainage.

[0037] In addition, the lip 510 abuts against the arc-shaped section 220. When mud and water enter, the arc-shaped structure can better guide the mud and water to the connection between the sealing lip 500 and the first rubber sleeve 300, reducing the contact position between the sealing lip 500 and the arc-shaped section 220, thereby forming a better sealing effect.

[0038] Example 4: Figure 4 As shown, the difference from Embodiment 1 is that a spring ring 600 is fitted at the end where the sealing lip 500 is connected to the first rubber sleeve 300. The spring ring 600 is made of rubber.

[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low friction hub bearing seal comprising a fixed cage (100) and a water shield (200) mounted to an outer race (20) and an inner race (30) respectively, the fixed cage (100) and water shield (200) being disposed in opposition, characterised in that: Further comprising a first rubber sleeve (300) wrapped on the fixed frame (100), the first rubber sleeve (300) is provided with a sealing lip (500) extending to the side of the water retaining ring (200) along the axial direction of the fixed frame (100), and the end of the sealing lip (500) is arranged against the water retaining ring (200); the end of the sealing lip (500) is bent towards the water retaining ring (200) to form a lip head (510).

2. The low friction hub bearing seal of claim 1, wherein: The first rubber sleeve (300) is provided with an oil-proof lip extending towards the radial direction of the fixed frame (100) and arranged with a gap between the oil-proof lip and the water retaining ring (200); the oil-proof lip is arranged obliquely along the axial direction inside the bearing.

3. The low friction hub bearing seal of claim 1, wherein: The outer edge of the water retaining ring (200) is provided with a water guide ring (210) extending along the axial direction of the water retaining ring (200), and the water guide ring (210) is arranged towards the frame.

4. A low friction hub bearing seal ring according to claim 3, characterised in that: The water guide ring (210) is arranged obliquely from one end connected with the water retaining ring (200) to the other end away from the axial center of the water retaining ring (200).

5. The low friction hub bearing seal of claim 1, wherein: The end of the water retaining ring (200) away from the axial center is provided with an arc segment (220), and the arc segment (220) is arranged in an arc shape towards the fixed frame (100).

6. A low friction hub bearing seal ring according to claim 5, characterised in that: The lip head (510) is arranged against the arc segment (220).

7. A low friction hub bearing seal ring according to claim 3 or 4 or 5 or 6 characterised in that: The end surface of the first rubber sleeve (300) towards the axial center of the fixed frame (100) is a guide inclined surface (310), and the guide inclined surface (310) is arranged obliquely away from the axial center along the extension direction of the sealing lip (500).

8. The low friction hub bearing seal of claim 1, wherein: The end of the sealing lip (500) connected with the first rubber sleeve (300) is provided with a spring ring (600).

9. The low friction hub bearing seal of claim 1, wherein: The water retaining ring (200) is wrapped with a second rubber sleeve (400).

Images