Amphibious vehicle transmission shaft sealing device

Abstract

The utility model discloses a sealing device for a transmission shaft of an amphibious vehicle, which comprises a flange type corrugated pipe, flanges and a sealing ring, and the flanges are respectively welded on a transmission shaft bracket at a rear axle and a frame cross beam and a gearbox. Flange type corrugated pipes are connected between a flange of a rear axle and a flange welded on a transmission shaft support, between the flanges welded on the transmission shaft support and between the flanges welded on the transmission shaft support and a flange of a gearbox through bolts or screws, and O-shaped sealing rings are arranged between the flanges and the flange type corrugated pipes. The sealing effect of the transmission shaft is achieved when the amphibious vehicle runs on the water, and guarantees are provided for the service life and safety of the transmission shaft and the vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of amphibious vehicles, and in particular relates to a transmission shaft sealing device for an amphibious vehicle. Background Art

[0002] Amphibious vehicles can be driven on land and on water. The amphibious vehicle is a wheel-paddle composite vehicle, which drives on land with high passability through wheels, and is propelled by paddles when the wheels are retracted on water. When the vehicle is driving on water, the engine is arranged above the water surface, and the engine distributes power to the transmission shaft through the transfer case. However, the multi-section transmission shaft connected between the gearbox and the rear axle will remain underwater. If the universal joint, transmission shaft and other components are directly exposed to the water, it is easy to cause corrosion, damage and the like. At the same time, the lubricating oil between the universal joint and the transmission shaft will leak when soaked in water, which will cause wear and overheating between the components, which is a great loss for the components. Over time, it will affect the driving of the car and even cause safety problems. Therefore, the utility model proposes a transmission shaft sealing device for an amphibious vehicle, which seals the transmission part of the car so that the transmission components do not directly contact the water, avoids the above-mentioned series of possible problems, reduces the potential safety hazards of the car driving, and increases the service life of each transmission component, so that the vehicle can also drive normally in water. Utility Model Content

[0003] The utility model aims to provide a transmission shaft sealing device for an amphibious vehicle, so as to solve the sealing problem of the existing amphibious vehicle when driving in water.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A driving shaft sealing device for an amphibious vehicle, comprising a flange-type bellows, a gearbox flange, a driving shaft bracket flange, a driving shaft bracket bevel-type flange, a rear axle bevel-type flange, a sealing ring, a universal joint, a driving shaft, a driving shaft bracket and a rear axle;

[0006] The transmission shaft brackets are installed at the frontmost cross beam, the middle cross beam and the endmost cross beam of the vehicle, and each transmission shaft bracket is sealed with a transmission shaft bracket flange; one end of the flange-type bellows of the front section is connected to the gearbox flange, and the other end is connected to the transmission shaft bracket flange; the left and right ends of the flange-type bellows of the middle section are respectively connected to the two transmission shaft bracket flanges; one end of the flange-type bellows of the end section is connected to the inclined flange of the transmission shaft bracket, and the other end is connected to the inclined flange of the rear axle;

[0007] A transmission shaft is installed in each section of the flange-type bellows; the transmission shaft is installed between the gearbox and the transmission shaft bracket, between the transmission shaft bracket and the transmission shaft bracket, and between the transmission shaft bracket and the rear axle through a universal joint; the transmission shaft between the transmission shaft bracket (9) and the rear axle has a downward inclination angle;

[0008] The inclination angle of the end face of the beveled flange at the transmission shaft bracket is consistent with the downward inclination angle of the transmission shaft; the inclination angle of the end face of the beveled flange at the rear axle is consistent with the downward inclination angle of the transmission shaft, and is connected to the outer ring of the raised part of the rear axle;

[0009] All flanges are sealed and connected to the flange-type bellows.

[0010] Furthermore, the flange type bellows is made of stainless steel and has a shrinkage range of 5% to 10%.

[0011] Furthermore, the middle section of the flange-type bellows includes at least one section, and the left and right ends of each section of the flange-type bellows are respectively connected to the flanges at the two transmission shaft brackets.

[0012] Furthermore, the downward inclination angle of the transmission shaft between the transmission shaft bracket and the rear axle is 10°; the inclination angle of the end face of the beveled flange at the transmission shaft bracket is 10°; and the inclination angle of the end face of the beveled flange at the rear axle is 10°.

[0013] Furthermore, all flange end surfaces are provided with grooves, and O-rings are provided in the grooves.

[0014] Furthermore, the transmission shaft bracket is welded to the cross beam of each section of the vehicle.

[0015] Furthermore, the flange at the transmission shaft bracket is welded to the transmission shaft bracket.

[0016] Furthermore, one side of the flange at the gearbox is connected to the gearbox by welding, and the other side is tightly connected to the flange-type bellows by bolts; the flange at the transmission shaft bracket is connected to the flange-type bellows by bolts; the beveled flange at the transmission shaft bracket is connected to the flange-type bellows by bolts; one side of the beveled flange at the rear axle is connected to the flange-type bellows (1) by screws, and the other side is welded to the rear axle.

[0017] Furthermore, the vehicle has at least three sections.

[0018] Furthermore, the flange-type bellows has at least three sections; the transmission shaft has at least three sections.

[0019] The beneficial effects of the utility model are:

[0020] The utility model has a simple structure, is easy to implement, has a good sealing effect, and is easy to disassemble. It has a long service life. The utility model adopts a flexible connection, which can ensure that the transmission shaft does not have a dead point position at all times and moves smoothly, and always maintains a good sealing effect during vehicle operation. The flange-type bellows is made of stainless steel. The expansion and contraction amount of the stainless steel bellows is between 5% and 10%. The pipe wall is thickened. The hose is waterproof, insulating, and tensile-resistant. The surface stainless steel material has the characteristics of corrosion resistance and high temperature resistance, which prevents the bellows from settling due to excessive length and damaging the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the main structural seal provided by the utility model.

[0022] Figure 2 This is a cross-sectional schematic diagram of the main structural seal provided by the utility model.

[0023] Figure 3 It is a partially enlarged cross-sectional schematic diagram of the seal between the crossbeam drive shaft bracket and the axle. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] The utility model provides a transmission shaft sealing device for an amphibious vehicle. For detailed structure, please refer to Figure 1 , Figure 2 and Figure 3 The sealing device includes: a flange-type bellows 1, a flange at a gearbox 2, a flange at a transmission shaft bracket 3, a bevel-type flange at a transmission shaft bracket 4, a bevel-type flange at a rear axle 5, a sealing ring 6, a universal joint 7, a transmission shaft 8, a transmission shaft bracket 9 and a rear axle 10.

[0026] The transmission shaft 8 has four sections, which are connected between the gearbox and the transmission shaft bracket 9, between the transmission shaft bracket 9 and the transmission shaft bracket 9, and between the transmission shaft bracket 9 and the rear axle 10 through the universal joint 7. The transmission shaft bracket 9 is welded to each section of the cross beam of the vehicle, and the transmission shaft 8 between the transmission shaft bracket 9 and the rear axle 10 has a downward inclination angle of about 10°.

[0027] The gearbox flange 2 is connected to the gearbox by welding, and the gearbox flange 2 and the front section flange-type bellows 1 are tightly connected by bolts, and a sealing ring 6 is provided between the gearbox flange 2 and the flange-type bellows 1; the flange at the other end of the flange-type bellows 1 is connected to the flange 3 at the drive shaft bracket by bolts, and the flange 3 at the drive shaft bracket is welded to the drive shaft bracket 9 of the front end cross beam of the vehicle, and a sealing ring 6 is provided between the flange-type bellows 1 and the flange 3 at the drive shaft bracket, thereby realizing the sealing of the first section of the drive shaft.

[0028] The left and right end faces of the flange-type bellows 1 in the middle section are respectively connected to the flanges 3 at the two transmission shaft brackets by bolts, and are located between the transmission shaft brackets 9 of the two cross beams of the vehicle. The flanges 3 at the transmission shaft brackets are respectively welded to the transmission shaft bracket 9 of the frontmost cross beam of the vehicle and the transmission shaft bracket 9 of the middle cross beam. Sealing rings 6 are provided between the flange-type bellows 1 and the flanges 3 at the two transmission shaft brackets, thereby achieving sealing of the middle section of the transmission shaft.

[0029] The beveled flange 4 at the transmission shaft bracket is welded to the transmission shaft bracket 9 of the vehicle end crossbeam, and is connected to the flange-type bellows 1 at the end section by bolts, and a sealing ring 6 is provided between the beveled flange 4 at the transmission shaft bracket and the flange-type bellows 1; the other end of the flange-type bellows 1 is connected to the beveled flange 5 at the rear axle by screws, and the beveled flange 4 at the transmission shaft bracket is welded to the rear axle 10, and a sealing ring 6 is provided between the flange-type bellows 1 and the beveled flange 5 at the rear axle, thereby realizing the sealing of the end section of the transmission shaft.

[0030] The inclination angle of the beveled flange end face at the transmission shaft bracket is about 10°, which is consistent with the downward inclination angle of the transmission shaft 8 between the transmission shaft bracket 9 and the rear axle 10, ensuring that the transmission shaft 8 and the flange-type bellows 1 in this section do not interfere with each other.

[0031] The end face inclination angle of the beveled flange 5 at the rear axle is about 10°, which is consistent with the downward inclination angle of the transmission shaft 8 between the transmission shaft bracket 9 and the rear axle 10. The beveled flange 5 at the rear axle is welded to the outer circle of the raised part of the rear axle 10 and does not interfere with the original flange on the rear axle 10.

[0032] During operation, according to the flexible characteristics of the flange type bellows 1, it can be slightly offset in all directions with the universal joint 7 and the transmission shaft 8 without affecting the original operating state. At the same time, the flange is welded with the transmission shaft bracket 9 and the rear axle 10, and the O-ring 6 is arranged in the groove on the end face of the flange, so that the overall device has a better seal.

[0033] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transmission shaft sealing device for an amphibious vehicle, characterized in that: It comprises a flange-type bellows (1), a gearbox flange (2), a transmission shaft bracket flange (3), a transmission shaft bracket bevel-type flange (4), a rear axle bevel-type flange (5), a sealing ring (6), a universal joint (7), a transmission shaft (8), a transmission shaft bracket (9) and a rear axle (10); the flange-type bellows (1) comprises a front section flange-type bellows, a middle section flange-type bellows and a rear section flange-type bellows; A transmission shaft bracket (9) is installed at the frontmost cross beam, the middle cross beam and the rearmost cross beam of the vehicle, and each transmission shaft bracket (9) is sealed with a transmission shaft bracket flange (3); one end of the front section flange-type bellows is connected to the gearbox flange (2), and the other end is connected to the transmission shaft bracket flange (3); the left and right ends of the middle section flange-type bellows are respectively connected to two transmission shaft bracket flanges (3); one end of the rear section flange-type bellows is connected to the transmission shaft bracket bevel flange (4), and the other end is connected to the rear axle bevel flange (5); A transmission shaft (8) is installed in each section of the flange-type bellows; the transmission shaft (8) is installed between the gearbox and the transmission shaft bracket (9), between the transmission shaft bracket (9) and the transmission shaft bracket (9), and between the transmission shaft bracket (9) and the rear axle (10) through a universal joint (7); the transmission shaft (8) between the transmission shaft bracket (9) and the rear axle (10) has a downward inclination angle; The end face inclination angle of the inclined surface flange (4) at the transmission shaft support is consistent with the downward inclination angle of the transmission shaft (8); the end face inclination angle of the inclined surface flange (5) at the rear axle is consistent with the downward inclination angle of the transmission shaft (8), and is connected to the outer ring of the raised part of the rear axle (10); The gearbox flange (2), the transmission shaft bracket flange (3), the transmission shaft bracket beveled flange (4) and the rear axle beveled flange (5) are all sealedly connected to the flange-type bellows (1).

2. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: The flange type bellows (1) is made of stainless steel and has an expansion / contraction amount between 5% and 10%.

3. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: The middle section of the flange-type bellows comprises at least one section, and the left and right ends of each section of the flange-type bellows are respectively connected to the flanges (3) at the two transmission shaft brackets.

4. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: The transmission shaft (8) between the transmission shaft bracket (9) and the rear axle (10) has a downward inclination angle of 10°; the end face inclination angle of the beveled flange (4) at the transmission shaft bracket is 10°; and the end face inclination angle of the beveled flange (5) at the rear axle is 10°.

5. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: All of the flange end surfaces are provided with a groove, and an O-type sealing ring (6) is provided in the groove.

6. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: The transmission shaft bracket (9) is welded to the cross beam of each section of the vehicle.

7. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: The transmission shaft bracket flange (3) is welded to the transmission shaft bracket (9).

8. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: One side of the gearbox flange (2) is connected to the gearbox by welding, and the other side is tightly connected to the flange-type bellows (1) by bolts; the flange (3) at the transmission shaft bracket is connected to the flange-type bellows (1) by bolts; the inclined flange (4) at the transmission shaft bracket is connected to the flange-type bellows (1) by bolts; one side of the inclined flange (5) at the rear axle is connected to the flange-type bellows (1) by screws, and the other side is welded to the rear axle (10).

9. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: The vehicle has at least three sections.

10. The transmission shaft sealing device for an amphibious vehicle according to claim 1, characterized in that: The flange-type bellows (1) has at least three sections; the transmission shaft (8) has at least three sections.

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