JPH0637090U - Wheel suspension - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a wheel suspension system that can protect a drive shaft from flying stones in an all-terrain vehicle. [Structure] Two front and rear arm parts whose front ends are integrally fixed
An arm member 52, which is formed in a substantially V shape with the base ends of 53, 54 separated from each other, is pivotally attached to the body frame at the base end so that the tip end can swing up and down. In a suspension system for a wheel, which has an axle support member 58 for rotatably supporting an axle of a wheel, and a drive shaft 38 is connected to the axle 11a, the suspension is provided below the drive shaft 38 and diagonally forward. A wheel suspension device characterized in that a front arm portion (53) of an arm member (52) is located, and a guard plate (70) covering at least the front side and the lower side is provided on the front arm portion (53).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a suspension system for a four-wheeled motor vehicle, and more particularly to a suspension arm for an all-terrain vehicle.

[0002]

[Prior art]

 In this type of rough terrain vehicle, a V-shaped suspension arm member in which the base ends of two front and rear arms, whose front ends are integrally fixed, are separated from each other, is pivotally attached to the body frame at the base end. A drive shaft extending laterally is connected to the axle (see Japanese Utility Model Laid-Open No. 64-25979).

Conventionally, no positive measures have been taken to protect this drive shaft from muddy water, bushes and the like.

[0004]

[Problems to be solved]

 As a result, muddy water may be splashed on the drive shaft or the bush may become entangled, which inevitably leads to an increase in weight due to the need to strengthen the drive shaft.

The present invention has been made in view of the above point, and an object of the present invention is to provide a wheel suspension device capable of protecting a drive shaft from a bush or the like.

[0006]

[Means and Actions for Solving the Problems]

 In order to achieve the above object, the present invention provides an arm member formed in a substantially V shape in which the base end portions of two front and rear arm portions, whose front end portions are integrally fixed, are separated from each other. The tip end of the arm member is pivotally attached to the body frame so that it can swing up and down, and the tip end of the arm member has an axle support member that rotatably supports the axle of the wheel, and the drive shaft is connected to the axle. In the suspension device for the wheel, the front arm portion of the arm member is positioned below the drive shaft and obliquely forward, and the front arm portion is provided with a guard plate that covers at least the front and the bottom. Suspended wheel suspension.

The guard plate provided on the front arm portion of the arm member is located below the drive shaft and obliquely in front of the drive shaft, and can protect the drive shaft from bushes and the like.

[0008]

【Example】

 An embodiment of the present invention illustrated in FIGS. 1 to 4 will be described.

The present embodiment is an example of a four-wheel drive type four-wheel buggy vehicle 1 which is an all-terrain vehicle. The front and rear parts of the vehicle body 10 are provided with a pair of left and right front wheels 11 and rear wheels 12 made of balloon tires, respectively, and the engine 30 mounted approximately at the center of the frame 20 made of pipe material allows the front wheels 11 and the rear wheels 12 to be connected. The front wheel 11 is steered by the handle 40 while being driven.

A fuel tank 13 is disposed in the upper center of the vehicle body 10, a seat 14 is continuously provided behind the fuel tank 13, and an engine 30 that integrally houses a speed change mechanism is disposed below the fuel tank 13. The center differential 31 is connected to the output side.

A rear wheel 12 is pivotally supported at a rear end of a swing arm 16 whose front end is pivotally supported by a frame 20, and a shock absorber 15 is interposed between the rear wheel 12 and the frame 20 to form a rear wheel suspension structure. The center diff 31 and the rear wheel diff 33 disposed between the left and right rear wheels 12 are connected to the rear wheel propulsion shaft 32, and the driving force of the engine 30 is transmitted to the rear wheels 12. On the other hand, the front side of the center differential 31 is connected to the front wheel differential 37 via the intermediate propulsion shaft 34, the conversion gear 35, and the front wheel propulsion shaft 36.

The front portion of the frame 20 is formed into a substantially triangular shape by the frame front pipe 21, the frame lower pipe 23, and the frame cushion pipe 28, and the frame upper pipe 26 is provided between the frame front pipe 21 and the frame cushion pipe 28. The erected structure is symmetrically arranged and both are connected by a cross pipe.

Front wheel suspension devices 45 are formed on the left and right sides of the front portion of the frame 20. The front wheel suspension device 45 is a double-wishbon type independent left and right, and is provided with an upper arm member 46 and a lower arm member 52 that are vertically arranged substantially parallel to each other on both sides of the frame 20.

As shown in FIG. 4, the lower arm member 52 includes two front arm portions 53 and a rear arm portion 54 made of a pipe material, the tips of which are connected to the tip member 55 to be integrated. The base ends are separated from each other and are formed in a substantially V shape, and a reinforcing member 56 is provided between the arms 53 and 54 to form a so-called A arm.

The lower arm member 52 is pivoted at the base ends of the front arm portion 53 and the rear arm portion 54 to bearings 57 that are fixed to the frame lower pipe 23 in the front-rear direction. Is extended obliquely rearward, and the rear arm 54 extends substantially laterally and then curves forward to reach the tip member 55, and the base end is pivotally supported and the tip can be swung up and down. I am trying.

Similarly, the upper arm member 46 also constitutes an A arm by the front arm portion 47, the rear arm portion 48, the tip member 49, and the reinforcing member 50, and the base end portions of the arm portions 47 and 48 are the frame upper pipe 26. Each of them is pivotally supported by a bearing 51 provided at the front end of the bearing so that it can swing up and down.

The tip members 49 and 55 of the upper arm member 46 and the lower arm member 52 are connected by a knuckle 58 which is an axle supporting member. The knuckle 58 pivotally supports the axle 11a of the front wheel 11 by a bearing 58a, the axle 11a and the front wheel differential portion 37 are connected by a drive shaft 38, and the driving force from the front wheel differential 37 is transmitted to the front wheel 11. To rotate.

The knuckle 58 is rotatably supported by the upper and lower tip members 49 and 55, and the upper arm member 46, the lower arm member 52, and the knuckle 58 constitute a substantially parallel link, and the knuckle 58. The knuckle 58 can be moved up and down substantially without changing the posture of the. A shock absorber 59 is interposed between the tip member 49 of the upper arm member 46 and the frame front pipe 21 to absorb the shock applied to the front wheel 11 from the ground contact surface and suppress the vibration.

The knuckle 58 can change the direction of the front wheel 11 by rotating the knuckle 58 by transmitting a manipulation of the handle 40 by connecting a tie rod to a knuckle arm protruding rearward.

As described above, the front wheel suspension device 45 constitutes a double-wishbon type independent suspension that is independent on the left and right. The drive shaft 38 that connects the front wheel diff 37 and the axle 11a of the front wheel 11 is oriented substantially at a right angle to the traveling direction, and the front arm of the lower arm member 52 is located in front of and diagonally below the drive shaft 38. The portion 53 is arranged diagonally rearward, and the guard plate 70 is attached to the front arm portion 53.

The guard plate 70 has the same shape as the one used for the suspension device on the left side and the one used on the right side, and can be used in common, and its shape is a horizontally long flat plate in the left-right direction. The left and right ends of the front edge bulge slightly forward, and the center of the rear edge bulges slightly rearward. Bolt holes 71 and 72 are formed in the guard plate 70 in the front-rear direction so as to sandwich the bent portion at the left-right symmetrical position, and four bolt holes 73 are formed at the left-right symmetrical position in the bulging portion at the center of the rear part. ing.

The guard plate 70 is applied to the front arm portion 53 of the lower arm member 52 from below, the bent portion is aligned with the front arm portion 53, the center is bent in an arc shape, and female screw holes 75a are provided at both ends. The individual mounting brackets 75 are applied from above so as to straddle the arms 53, the front and rear female screw holes 75a are aligned with the bolt holes 71 and 72 of the guard plate 70, and the bolts 77 are penetrated from below to form the female screw holes 75a. Tighten the screws.

A bulging portion at the center of the rear part of the guard plate 70 is in contact with the lower side of the reinforcing member 56, and a mounting member 76 having substantially the same shape as the mounting member 75 is applied from above so as to straddle the reinforcing member 56. The female screw holes 76a on the right and left sides of the insulator are aligned with the two bolt holes 73 on the diagonal line of the guard plate 70, and the bolts 78 are penetrated from below and screwed and tightened in the female screw holes 76a. By attaching the guard plate 70 to the reinforcing member 56, the guard plate 70 is prevented from rotating and the guard plate 70 is positioned.

When the guard plate 70 is thus attached to the front arm portion 53, the guard plate 70 is bent along the arm portion 53 so that the front portion extends obliquely upward to the front and the rear portion extends substantially horizontally to the rear. Becomes

Therefore, the guard plate 70 is configured to cover the lower side of the drive shaft 38 and the diagonally front side thereof, so that the drive shaft 38 can be protected from running muddy water, bushes and the like. Further, not only the drive shaft 38 but also parts around the arm can be protected from the bush and the like.

Since the guard plate 70 is tightened and fixed to the arm portion 53 by using the mounting brackets 75 and 76 with the bolts 77 and 78, the cost of the parts is lower than that of directly connecting the guard plate to the arm portion by welding or the like. In addition, it is easy to replace parts. Since the left and right guard plates 70 have the same shape and can be used in common, the product cost can be reduced.

Since the contact position of the guard plate 70 with the reinforcing member 56 is different when the guard plate 70 is attached to the left lower arm member 52 and when it is attached to the right lower arm member 52, the attaching to the reinforcing member 56 is performed. The metal fitting 76 is screwed with a bolt 78 by aligning the female screw hole 76a with another diagonal bolt hole 73 of the guard plate 70.

[0028]

[Effect of device]

 In the present invention, since the guard plate covers the lower side of the drive shaft and the diagonally front side, the drive shaft can be protected from the bush and the like.

[Brief description of drawings]

FIG. 1 is a side view of a four-wheel buggy vehicle according to an embodiment of the present invention.

FIG. 2 is an exploded front view of main parts.

FIG. 3 is a front view of the main part with some parts omitted.

FIG. 4 is a plan view of the same.

[Explanation of symbols]

1 ... Four-wheeled bucky vehicle, 11 ... Front wheel, 12 ... Rear wheel, 13 ... Fuel tank, 14 ... Seat, 15 ... Shock absorber, 16 ... Swing arm, 20
… Frame, 21… Frame front pipe, 23… Frame lower pipe, 26… Frame upper pipe, 28… Frame cushion pipe, 30… Engine, 31… Center differential, 32… Rear wheel propulsion shaft, 33… Rear wheel differential, 34… Intermediate propulsion shaft, 35 ... Conversion gear, 36 ... Front wheel propulsion shaft, 37 ... Front wheel differential, 38
... drive shaft, 40 ... handle, 45 ... front wheel suspension device, 46 ... upper arm member, 47 ... front arm part, 48 ... rear arm part, 49 ... tip member, 50 ... stiffener, 51 ... bearing, 52 ... bottom Side arm member, 53 ... Front arm portion, 54 ... Rear arm portion, 55 ... Tip member, 56 ... Reinforcing material, 57 ... Bearing, 58 ... Knuckle, 59 ... Shock absorber, 70 ... Guard plate, 71, 72, 73 … Bolt holes, 75,
76… Mounting hardware, 77,78… Bolts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Masahiro Kawamata 1-4-1 Chuo, Wako City, Saitama Prefecture Honda R & D Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An arm member formed in a substantially V shape with the base end portions of two front and rear arm portions, whose front end portions are integrally fixed, is separated from each other, and the base end portions are pivotally attached to a vehicle body frame and the front ends are provided. In the suspension device for the wheel, the portion is swingable up and down, and the end portion of the arm member has an axle support member that rotatably supports the axle of the wheel, and the drive shaft is connected to the axle. A wheel suspension device characterized in that the front arm portion of the arm member is positioned below the drive shaft and diagonally forward, and a guard plate that covers at least the front and the lower portion is provided on the front arm portion. .