Waterproof silt-proof high-load all-terrain vehicle bottom fork structure

Abstract

A waterproof silt-proof high-load all-terrain vehicle bottom fork structure comprises a frame and a bottom fork, the bottom fork is rotationally connected to the front end of the frame, the tail of the bottom fork is a penetrating end, a top pipe is arranged in the penetrating end, and the positions, close to the end, of the two sides of the top pipe are sleeved with rubber rings from inside to outside in a limiting mode. The rubber ring is in transition fit with the inner wall of the penetrating end part to form a sealing structure for isolating the conical bearings from the outside, the jacking pipe is in running fit with the inner wall of the penetrating end part through the conical bearings on the two sides, a flange shaft is arranged in the jacking pipe in a penetrating mode, the flange shaft is in clearance fit with the jacking pipe, and the two ends of the flange shaft are fixed to the frame. The bottom fork has the advantages that the structure is reasonable and compact, the waterproof, dustproof and silt-proof characteristics of the bottom fork are improved through the rubber ring, and lubrication of the conical bearing and movement of the bottom fork are guaranteed; by utilizing the conical bearing, the load is enhanced, and the precision is ensured by utilizing the matching of the inclination angles of the inner ring and the outer ring; and the axial movement of the bottom fork is also solved, and the stability of the whole vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical structure technical field especially relates to a full terrain vehicle, concretely is a waterproof and silt high load full terrain vehicle flat fork structure. BACKGROUND

[0002] At present, the connecting structure of the full terrain vehicle flat fork and the frame on the market is generally two kinds, which are supported by copper bush or needle bearing to connect the frame, that is, one is the gap fit of copper bush and flange shaft, and the flat fork rotates with the flange shaft as the pin; the second is the interference or transition fit of needle bearing and flange shaft, the bearing outer ring connects the flat fork, and the bearing inner ring rotates with the flange shaft as the pin.

[0003] Because the full terrain vehicle is used in various places, it needs to adapt to various places, and the above two kinds of connecting structures have the following defects; poor waterproofness leads to easy entry of silt and water from the flat fork pipe side to damage the internal structure; copper bush support belongs to rigid connection gap fit, under the long-time movement of the whole vehicle, the copper bush has poor transmission, the gap fit is easy to wear, the gap will become larger and larger to damage the structure and make the flat fork shake; because the inner ring and the outer ring of the needle bearing adopt needle transmission, the needle bearing needle diameter is small and has poor bearing capacity and is easy to be damaged, and the small needle diameter is easy to be damaged, which affects the connection movement of the flat fork. Finally, the result of the above connecting structure is that the flat fork structure has poor waterproofness and dustproofness, which is easy to lead to rust or foreign matter entering and causing the hidden trouble of flat fork rotation jamming. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the above-mentioned problems existing in the prior art, provides a waterproof and silt high load full terrain vehicle flat fork structure, solves the problem of poor waterproofness and dustproofness of the flat fork connecting structure of the current high load full terrain vehicle, easy damage and rotation jamming, meets the demand of waterproof and dustproof flat fork connecting structure and smooth rotation.

[0005] The utility model discloses a waterproof and siltproof high-load full-terrain vehicle flat fork structure which comprises a frame and a flat fork, the flat fork is rotatably connected to the front end of the frame, the tail part of the flat fork is a pipe-shaped structure, a top pipe with a pipe-shaped structure is arranged in the pipe-shaped structure, a conical bearing and a sealing rubber ring are arranged on the two sides of the top pipe close to the end part, the rubber ring and the inner wall of the pipe-shaped structure are in transition fit to form a sealing structure for isolating the conical bearing from the outside, the top pipe and the inner wall of the pipe-shaped structure are rotatably connected through the two conical bearings, a flange shaft is arranged in the top pipe, and the flange shaft is in clearance fit with the top pipe and is fixed on the frame through the two ends.

[0006] As a further improvement of the utility model, a limiting ring is arranged on the outer wall of the top pipe according to the central symmetry, and the limiting ring is a limiting structure for positioning the inner side of the conical bearing. The limiting ring is used for providing a positioning limiting structure for the conical bearing, so as to ensure that the conical bearing is installed at a specified position to meet the assembly requirements.

[0007] As a further improvement of the utility model, the end wall of the top pipe is connected with a stepped sleeve to form a filling structure for controlling the clearance fit between the top pipe and the flange shaft. The stepped sleeve is used for controlling the clearance fit between the top pipe and the flange shaft, so as to ensure that the flat fork rotates smoothly and naturally.

[0008] As a further improvement of the utility model, one end of the flange shaft is a fixed limiting structure, and the other end is fixed on the frame through a gasket and a nut. The one end of the flange shaft is locked with the gasket and the nut to form a pin connection mechanism, the flat fork is connected to the frame, and the other end is a fixed limiting structure, which can effectively fix the two ends of the flange shaft on the frame.

[0009] As a further improvement of the utility model, the outer circle end face of the stepped sleeve is in contact with the inner wall of the pipe-shaped structure. In this way, the pipe-shaped structure is further closed, so that foreign matters cannot enter the inside of the pipe-shaped structure to avoid the abrasion of the internal structure.

[0010] The beneficial effects of the utility model are as follows: the utility model has a reasonable and compact structure, and the waterproof, dustproof and mud-proof properties of the fork are improved by utilizing the rubber ring, thereby ensuring the lubrication of the tapered bearing and the movement of the fork; the utilization of the tapered bearing increases the load while utilizing the matching of the inclination angles of the inner and outer rings thereof to ensure accuracy; the assembly characteristics of the step sleeve, the rubber ring, the tapered bearing, etc. are utilized to facilitate the installation of the fork and the subsequent maintenance and replacement of the bearing; the axial movement of the fork is also resolved, thereby increasing the stability of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 This is an exploded view of the present invention.

[0013] Explanation of the reference numerals: frame 1, rubber ring 2, tapered bearing 3, top tube 4, limiting ring 4-1, flat fork 5, through-end 5-1, flange shaft 6, gasket 7, nut 8, step sleeve 9. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Referring to the accompanying drawings: This waterproof, mud-proof, high-load all-terrain vehicle flat fork structure in this embodiment includes a frame 1 and a flat fork 5. The flat fork 5 is rotatably connected to the front end of the frame 1. The tail of the flat fork 5 is a tubular structured penetration end 5-1. A tubular structured top pipe 4 is provided in the penetration end 5-1. Both sides of the top pipe 4, near the end positions, are limited from the inside to the outside with a tapered bearing 3 and a sealing rubber ring 2. The rubber ring 2 and the inner wall of the penetration end 5-1 are transitionally matched to form a sealing structure that isolates the tapered bearing 3 from the outside. The top pipe 4 and the inner wall of the penetration end 5-1 are rotationally matched by the tapered bearings 3 on both sides. A flange shaft 6 is passed through the top pipe 4. The flange shaft 6 is clearance-matched with the top pipe 4 and both ends of the flange shaft 6 are fixed to the frame 1.

[0016] A limiting ring 4 - 1 is provided on the outer wall of the top pipe 4 in a centrally symmetrical manner. The limiting ring 4 - 1 is a limiting structure for positioning the inner end of the tapered bearing 3 .

[0017] The end wall of the top tube 4 is connected with a step sleeve 9 to form a filling structure for controlling the clearance fit between the flat fork 5 and the frame 1 .

[0018] One end of the flange shaft 6 is a fixed limiting structure and the other end is fastened to the vehicle frame 1 by a washer 7 and a nut 8 .

[0019] The outer ring end surface of the step sleeve 9 is in contact with the inner wall of the penetration end portion 5-1.

[0020] Although the utility model has carried on the illustration and the description through the reference preferred embodiment, but, the professional ordinary skilled person should understand, can make various changes in form and detail in the scope of claims.

Claims

1. A waterproof, mud-proof, high-load all-terrain vehicle flat fork structure, comprising a vehicle frame (1) and a flat fork (5), wherein the flat fork (5) is rotatably connected to the front end of the vehicle frame (1), and is characterized by: The tail of the flat fork (5) is a through-end portion (5-1) of a tubular structure, a top tube (4) of a tubular structure is provided in the through-end portion (5-1), tapered bearings (3) and rubber rings (2) for sealing are sleeved from the inside to the outside near the end positions on both sides of the top tube (4), the rubber ring (2) and the inner wall of the through-end portion (5-1) are transitionally matched to form a sealing structure that isolates the tapered bearing (3) from the outside, the top tube (4) and the inner wall of the through-end portion (5-1) are rotationally matched by the tapered bearings (3) on both sides, a flange shaft (6) is provided in the top tube (4), the flange shaft (6) and the top tube (4) are clearance-matched, and both ends of the flange shaft (6) are fixed to the frame (1).

2. The waterproof, mud-proof, high-load all-terrain vehicle flat fork structure according to claim 1 is characterized by: A limiting ring (4-1) is provided on the outer wall of the top pipe (4) according to central symmetry. The limiting ring (4-1) is a limiting structure for positioning the inner end of the tapered bearing (3).

3. The waterproof, mud-proof, high-load all-terrain vehicle flat fork structure according to claim 1 or 2, characterized in that: The end wall of the jacking pipe (4) is connected with a step sleeve (9) to form a filling structure for controlling the clearance fit between the jacking pipe (4) and the flange shaft (6).

4. The waterproof, mud-proof, high-load all-terrain vehicle flat fork structure according to claim 1 is characterized by: One end of the flange shaft (6) is a fixed limiting structure, and the other end is fixed to the vehicle frame (1) by tightening with a gasket (7) and a nut (8).

5. The waterproof, mud-proof, high-load all-terrain vehicle flat fork structure according to claim 3 is characterized by: The outer ring end surface of the step sleeve (9) is in contact with the inner wall of the penetration end portion (5-1).

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