An oil drain and waterproof sealing structure for the rotating pair of an articulated steering device

Abstract

An oil-draining and waterproof sealing structure for the rotating joint of an articulated steering device includes a rotating shaft, a fixed seat, a water seal ring, and an oil seal ring. The upper surface of the oil seal ring has a U-shaped annular groove, and the water seal ring is installed in the U-shaped annular groove of the oil seal ring. The lower end of the water seal ring is tightly engaged with the oil seal ring, and the upper end has an inclined deformable tongue along its outer side. When the rotating shaft and the fixed seat are installed, the lower end of the fixed seat is tightly engaged with both the water seal ring and the oil seal ring. Through the implementation of this invention, water can be effectively blocked within the water area, while deteriorated liquid oil can flow from the oil storage area to the water area, achieving the oil-draining and waterproofing function of the transmission pair. This solves the problems of insufficient lubrication of the rotating joint of the articulated steering device in all-terrain vehicles and rust caused by water ingress, thereby improving the reliability and safety of dual-body all-terrain vehicles.

Description

Technical Field

[0001] This invention relates to an oil draining and waterproof sealing structure for the rotating pair of an articulated steering device. Background Technology

[0002] Dual-body all-terrain vehicles are mainly used in harsh terrains such as swamps, snowfields, mountains, and lakes. The dual-body all-terrain vehicle is mainly composed of three parts: the front body, the rear body, and the articulated steering system. The front and rear bodies have a boat-shaped sealed box structure with good waterproof structure. However, the articulated steering system cannot use a boat-shaped sealed box structure for waterproofing when it is performing steering, pitching, and yaw functions. This leads to rust at the rotating joints, affecting the safety and reliability of the entire vehicle. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides an oil drainage and waterproof sealing structure for the rotating pair of an articulated steering device.

[0004] The present invention is achieved through the following technical solutions.

[0005] This invention provides an oil-draining and waterproof sealing structure for the rotating pair of an articulated steering device, comprising a rotating shaft, a fixed seat, a water seal ring, and an oil seal ring. The outer end face of the rotating shaft has an axial step with an annular groove, and the oil seal ring is installed within the annular groove. The upper surface of the oil seal ring has a U-shaped annular groove, and the water seal ring is installed within the U-shaped annular groove of the oil seal ring. The lower end of the water seal ring is tightly engaged with the oil seal ring, and the upper end has an inclined deformable tongue extending obliquely upwards along the outer side. When the rotating shaft and the fixed seat are installed, the lower end of the fixed seat is tightly engaged with both the water seal ring and the oil seal ring. The area between the rotating shaft, the fixed seat, and the oil seal ring is an oil storage area coated with solid lubricating oil, and the area between the rotating shaft, the fixed seat, and the water seal ring is a water area that can contact external water.

[0006] Furthermore, the water seal ring rotates with the rotation of the rotating shaft and remains stationary.

[0007] Furthermore, the oil seal ring rotates with the rotation of the rotating shaft and remains stationary at rest.

[0008] Furthermore, the bottom of the fixing seat is provided with a fixing seat contact cylindrical surface, and the oil sealing ring is engaged with the fixing seat at the fixing seat contact cylindrical surface.

[0009] Furthermore, the bottom of the fixing seat is provided with a fixing seat contact conical surface, the fixing seat contact conical surface is adapted to the inclination of the inclined deformable tongue, and the fixing seat and the water seal ring are combined at the fixing seat contact conical surface.

[0010] Furthermore, the inner surface of the inclined deformable tongue is the inner contact surface of the water seal ring, and the inner contact surface of the water seal ring contacts the oil storage area; the outer surface of the inclined deformable tongue is the outer contact surface of the water seal ring, and the outer contact surface of the water seal ring contacts the water area.

[0011] An articulated steering device for an all-terrain vehicle includes a front vehicle pitch rotating joint, a steering rotating joint, a rear vehicle pitch rotating joint, and a yaw rotating joint. The front vehicle pitch rotating joint, the steering rotating joint, the rear vehicle pitch rotating joint, and the yaw rotating joint are provided with any of the above-described oil drainage and waterproof sealing structures.

[0012] The beneficial effects of this invention are as follows: By implementing this invention, using a structure in which a water seal ring is fitted inside an oil seal ring, and setting an inclined deformable tongue structure on the water seal ring, water can be effectively blocked within the water area, while deteriorated liquid oil can flow from the oil storage area to the water area, thus realizing the oil drainage and waterproof function of the transmission pair. This solves the problems of insufficient lubrication of the rotating joints of the articulated steering device of all-terrain vehicles and rust caused by water ingress, thereby improving the reliability and safety of dual-body all-terrain vehicles. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the oil-draining and waterproofing structure of the present invention;

[0014] Figure 2 This is a schematic cross-sectional view of the water seal ring of the present invention;

[0015] Figure 3 This is a schematic diagram showing the positions of the various rotating joints on the articulated steering system of a dual-body all-terrain vehicle.

[0016] In the diagram: 1-front vehicle pitch rotating joint, 2-steering rotating joint, 3-rear vehicle pitch rotating joint, 4-yaw rotating joint, 5-rotating shaft, 6-oil storage area, 7-fixed seat, 8-fixed seat contact cylindrical surface, 9-fixed seat contact conical surface, 10-water seal ring, 11-oil seal ring, 12-water area, 13-inner contact surface of water seal ring, 14-outer contact surface of water seal ring, 15-inclined deformable tongue. Detailed Implementation

[0017] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0018] like Figure 1-2As shown, an oil-draining and waterproof sealing structure for a rotating pair of an articulated steering device includes a rotating shaft 5, a fixed seat 7, a water seal ring 10, and an oil seal ring 11. The outer end face of the rotating shaft 5 has an axial step with an annular groove, and the oil seal ring 11 is installed in the annular groove. The upper surface of the oil seal ring 11 has a U-shaped annular groove, and the water seal ring 10 is installed in the U-shaped annular groove of the oil seal ring 11. The lower end of the water seal ring 10 is tightly engaged with the oil seal ring 11, and the upper end has an inclined deformable tongue along the outer side. When the rotating shaft 5 and the fixed seat 7 are installed, the lower end of the fixed seat 7 is tightly engaged with both the water seal ring 10 and the oil seal ring 11. An oil storage area 6 is formed between the rotating shaft 5, the fixed seat 7, and the oil seal ring 11, coated with solid lubricating oil. A water area 12 is formed between the rotating shaft 5, the fixed seat 7, and the water seal ring 10, which can contact external water. The inner surface of the inclined deformable tongue is the inner contact surface 13 of the water seal ring, which contacts the oil storage area 6; the outer surface of the inclined deformable tongue is the outer contact surface 14 of the water seal ring, which contacts the water area 12. The water seal ring 10 and the oil seal ring 11 rotate with the rotation of the rotating shaft 5 and remain stationary at rest. The bottom of the fixed seat 7 is provided with a fixed seat contact cylindrical surface 8 and a fixed seat contact conical surface 9. The oil seal ring 11 is engaged with the fixed seat 7 at the fixed seat contact cylindrical surface 8; the fixed seat contact conical surface 9 is adapted to the inclination of the inclined deformable tongue, and the fixed seat 7 and the water seal ring 10 are engaged at the fixed seat contact conical surface 9.

[0019] Under the action of water pressure or oil pressure, the inner contact surface 13 and the outer contact surface 14 of the water seal ring 10 can cause the tilted deformation tongue to undergo displacement deformation.

[0020] When the vehicle performs pitching, turning, and yaw movements on land, the rotating shaft 5 rotates relative to the fixed seat 7. The solid grease in the oil storage area 6 lubricates the rotating shaft 5 under the action of the oil film generated by the rotation of the oil seal ring 11 and the cylindrical contact surface 88 of the fixed seat. When the grease in the oil storage area 6 deteriorates into liquid and the rotating shaft 5 is stationary relative to the fixed seat 7, the liquid oil flows out through the gap between the oil seal ring 11 and the cylindrical contact surface 8 of the fixed seat. The pressure generated by the liquid oil acts on the contact surface 13 inside the water seal ring, causing the tilting deformation tongue to undergo displacement deformation, creating a certain gap between the water seal ring 10 and the conical contact surface 9 of the fixed seat. At this time, the liquid oil can flow out, achieving the purpose of removing the deteriorated oil.

[0021] When the vehicle performs pitching, turning, and yaw movements in the water, when the rotating shaft 5 rotates or remains stationary relative to the fixed seat 7, the pressure generated by the water in the water area 12 acts on the outer contact surface 14 of the water seal ring, causing the tilting deformation tongue to displace and deform, and press tightly against the contact cone surface 9 of the fixed seat, thereby preventing water from entering the oil storage area 6.

[0022] like Figure 3As shown, an articulated steering device for an all-terrain vehicle includes a front vehicle pitch rotating joint 1, a steering rotating joint 2, a rear vehicle pitch rotating joint 3, and a yaw rotating joint 4. The front vehicle pitch rotating joint 1, the steering rotating joint 2, the rear vehicle pitch rotating joint 3, and the yaw rotating joint 4 are provided with the oil drainage and waterproof sealing structure described in this invention.

Claims

1. A draining and waterproof sealing structure for the rotating pair of an articulated steering device, characterized in that: Includes rotating shaft, fixed seat, water seal ring and oil seal ring; The outer end face of the rotating shaft is provided with an axial step, and the axial step is provided with an annular groove. The oil seal ring is installed in the annular groove. The upper surface of the oil seal ring is provided with a U-shaped annular groove. The water seal ring is installed in the U-shaped annular groove provided by the oil seal ring. The lower end of the water seal ring is tightly engaged with the oil seal ring, and the upper end is provided with an inclined deformable tongue along the outer side. When the rotating shaft is installed with the fixed seat, the lower end of the fixed seat is tightly engaged with both the water seal ring and the oil seal ring. The area between the rotating shaft, the fixed seat, and the oil seal ring is an oil storage area coated with solid lubricating oil, and the area between the rotating shaft, the fixed seat, and the water seal ring is a water area that can come into contact with external water.

2. The oil drainage and waterproof sealing structure for the rotating pair of an articulated steering device as described in claim 1, characterized in that: The water seal ring rotates with the rotation of the rotating shaft and remains stationary.

3. The oil drainage and waterproof sealing structure for the rotating pair of an articulated steering device as described in claim 1, characterized in that: The oil seal ring rotates with the rotation of the rotating shaft and remains stationary when at rest.

4. The oil draining and waterproof sealing structure for the rotating pair of an articulated steering device as described in claim 1, characterized in that: The bottom of the fixing seat is provided with a fixing seat contact cylindrical surface, and the oil sealing ring is engaged with the fixing seat at the fixing seat contact cylindrical surface.

5. The oil draining and waterproof sealing structure for the rotating pair of an articulated steering device as described in claim 1, characterized in that: The bottom of the fixed seat is provided with a fixed seat contact conical surface, which is adapted to the inclination of the inclined deformable tongue. The fixed seat and the water seal ring are combined at the fixed seat contact conical surface.

6. The oil draining and waterproof sealing structure for the rotating pair of an articulated steering device as described in claim 1, characterized in that: The inner surface of the inclined deformable tongue is the inner contact surface of the water seal ring, and the inner contact surface of the water seal ring contacts the oil storage area; the outer surface of the inclined deformable tongue is the outer contact surface of the water seal ring, and the outer contact surface of the water seal ring contacts the water area.

7. An articulated steering device for an all-terrain vehicle, comprising a front vehicle pitch rotating joint, a steering rotating joint, a rear vehicle pitch rotating joint, and a yaw rotating joint, characterized in that: The front vehicle pitch-rotor joint is equipped with an oil drainage and waterproof sealing structure as described in any one of claims 1-6.

8. The all-terrain vehicle articulated steering device as described in claim 7, characterized in that: The steering rotary pair is provided with an oil drainage and waterproof sealing structure as described in any one of claims 1-6.

9. The all-terrain vehicle articulated steering device as described in claim 7, characterized in that: The rear vehicle pitch-rotor pair is equipped with an oil drainage and waterproof sealing structure as described in any one of claims 1-6.

10. The all-terrain vehicle articulated steering device as described in claim 7, characterized in that: The deflection rotating pair is provided with an oil drainage and waterproof sealing structure as described in any one of claims 1-6.

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