JPH048001Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for an axle of a vehicle having two rear wheels, and more particularly to a mounting structure capable of connecting left and right spindles without welding.

Regarding the axles of conventional vehicles, especially the rear axles, as shown in FIG. 1, wheels (not shown) are rotatably supported at both ends of a hollow cylindrical axle 1 (only one end is shown in the figure). spindle 2
Generally, the joint is fixed by welding 3 by penetrating the brake panel, and in some cases, a brake panel mounting flange (not shown) is fixed to the spindle 2 by welding.

However, such welding has the disadvantage that the strength of the carbon steel forming the spindle 2 deteriorates, which poses problems in terms of durability and safety.

In addition, in small tricycles, the spindle and axle are not separate but integrated, but in this case the weight is relatively increased and the shape is complicated, making it difficult to work. It had such problems.

Furthermore, for those that use leaf springs as a suspension system for the rear axle, as shown in Figure 1,
Since the ends of the leaf springs 6 are fixed to the axle 1 using separate fastening means such as bolts 4 and washers 5, costs increase and weight reduction is required, especially in ultra-compact three- and four-wheeled vehicles. The top was also at a disadvantage.

This invention was made in view of the above circumstances.
To provide an axle mounting structure for a rear two-wheeled vehicle, in which a brake panel mounting flange can be mounted without deteriorating the strength of the spindle.

In order to achieve the above object, the present invention provides an axle mounting structure for a rear two-wheeled vehicle in a rigid axle suspension, in which a rear spindle, a rear axle, and a brake panel mounting flange are each formed separately using carbon steel. , a brake panel mounting flange is welded to the edge of the rear axle, and the fixing parts of the left and right rear spindle ends are fitted into the cylindrical rear axle, and furthermore, a The end portion of the leaf spring, the fixing portion of the rear spindle, and the rear axle are tightly connected to each other by bolts passing through these three members.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

2 to 6 show an embodiment of the present invention,
As shown in the bottom view of Fig. 2, this embodiment is applied to a lean tricycle, that is, a tricycle in which at least the driver's seat and the support rod supporting the seat are set to be swingable in a direction substantially perpendicular to the axial direction of the vehicle body. In FIG. 2, 7 and 8 are a pair of rear wheels, 9 is a rear axle, 10 and 10 are a pair of rear frames, and 11 and 11 are a pair of rear wheels with both ends connected to the rear frame 10 and the rear axle 9. A pair of leaf springs 12 are fixedly connected to each other; 12 is a lean pivot housing to which the front end of the rear frame 10 is fixed; 14 is a lean pivot housing that rotatably supports the front frame 13;
A pair of first footrest brackets 15 are fixed to the first bracket 14, and second footrest brackets 16 are fixed to both ends of the first bracket 14 in the axial direction.
17 is a footrest fixed to the brackets 14 and 15; 17 is a seat support rod whose upper end is connected to the driver's seat (not shown) and whose lower end is fixed to the front frame 13 so that it can swing freely; 18 is a front wheel;
20 is a bridge pipe connecting the pair of rear frames, and 20 is a stabilizer rod.

That is, in the lean tricycle according to this embodiment, the driver's seat (not shown) is integrated with the seat support rod 17, the front frame 13, the operating handle (not shown) connected to the front frame 13, and the front wheel 18, so that the driver's seat (not shown) can move in the left-right direction. That is, it is swingable in a direction substantially perpendicular to the axial direction, and the footrest 16 is integrally connected to the rear frame 10 via the lean pivot housing 12 so as to be able to stand on its own.

Therefore, a rigid axle suspension system is adopted in which the vertical vibrations applied to the rear two wheels 7 and 8 are buffered and attenuated by the action of a pair of leaf springs 11, and the pair of leaf springs 11 are arranged relative to the axle traveling direction. Roll rigidity is increased by symmetrically arranging the rolls in a V-shape.

3 to 6 show details of the mounting structure of the rear axle 9 according to this embodiment, FIG. 3 is an enlarged view of the main part of the mounting structure in FIG. 2, and FIG. 4 is the same as that in FIG. 5 is a sectional view taken along the line BB in FIG. 4, and FIG. 6 is a sectional view taken along the line C--C in FIG. 4.

As shown in FIGS. 3 to 5, the rear axle 9 includes a rear axle 91 and a pair of rear spindles 9.
It is composed of 2. (Each figure shows only one rear spindle 92.) The rear axle 91 is formed of a square tube with a rectangular cross section, and is arranged so that its long side is located in the horizontal direction.

A flange 21 for attaching a brake panel is fixed to an end edge 91a of the rear axle 91, and a rear spindle 92 is disposed through a hole 21a drilled in the center of the flange 21. The base end fixing 92a is tightly connected to the rear axle 91 together with the leaf spring 11 by a fastening means M.

That is, the base end fixing portion 92 of the rear spindle 92
A is expanded in the horizontal direction as shown in FIG. 5, and a pair of holes 22 for mounting bolts are penetrated through the expanded portion, and the rear axle 91 and the leaf spring disposed on its upper surface are Rear end 11 of 11
A similar mounting hole is drilled at the corresponding position of a, and a washer 23 for tightening the spring 11 is inserted into the upper part of the rear end portion 11a of the leaf spring, and a washer 24 is also provided on the lower surface of the rear axle 91. Via
The rear axle 91, rear spindle 92, and leaf spring 11 are tightly fixed together by a pair of mounting bolts 25, 25.

A brake panel 26 is attached and fixed to the flange 21 fixed to the end of the rear axle 91, as shown in FIGS. 4 and 6. In addition, in FIG. 4, 27 is a wheel bearing that rotatably supports the rear spindle 92, 28 is a brake drum, 29 is a rim flange, 30 is a tire, and 31 is a lease spring 11 and the frame 1.
This is a connecting plate with 0.

In this embodiment, the rear axle 91 and the rear spindle 92 are separate bodies, and are configured so that they are connected together by the fastening means M without welding.
The high carbon steel that makes up the product does not suffer from deterioration in strength during the welding process, and it has excellent durability and safety, and the overall weight can be reduced.

Moreover, by making the axle 91 and the spindle 92 separate, the left and right spindles 92 can be designed to have the same shape, making processing easier and more efficient.

Further, the fastening means M includes the leaf spring 11
Since it also serves as a fixing means, the mounting structure is simplified, and costs and weight can be reduced.

Although this embodiment shows an example in which the present invention is applied to a so-called lean tricycle, the present invention is not limited thereto, and can be applied to any rigid axle suspension type vehicle having two rear wheels.

Further, the number of bolts 25 constituting the fastening means M, the shape of the washer 23, etc. can be arbitrarily set according to design conditions.

As explained above, according to the axle mounting structure for a rear two-wheeled vehicle according to the present invention, the brake panel mounting flange is welded to the edge of the rear axle. Therefore, the strength of the rear spindle is not reduced.

In addition, the fixing parts of the left and right rear spindle ends are fitted into the cylindrical rear axle, and the leaf spring ends disposed at corresponding positions on the outer periphery of the rear axle, the fixing parts of the rear spindle, and the rear axle are connected together. Since the structure is such that they are connected to each other by bolts that pass through the holes, these three parts can be fastened at the same location, and the number of holes that pass through the holes for the bolts is minimal, and the rear Deterioration in the strength of the axle can also be minimized.

Furthermore, in this invention, the rear spindle, rear axle, and brake panel mounting flange are each formed separately from carbon steel, making them easier to work with and reducing weight and manufacturing costs. The points that can be improved are also maintained.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram showing a conventional axle mounting structure, Figs. 2 to 6 show an embodiment of the present invention, and Fig. 2 is a conceptual diagram from the bottom of a lean tricycle to which the present invention is applied. , FIG. 3 is an enlarged view of the main parts of the mounting structure of the rear axle, FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3, FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4, and FIG. The figure is a view taken along the line C--C in FIG. 4. 9...Rear axle, 91...Rear axle, 92
... Rear spindle, 11 ... Leaf spring, M ... Fastening means, 23, 24 ... Washer, 25
……bolt.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a mounting structure for the axle of a rear two-wheeled vehicle in a rigid axle suspension, in which a rear spindle, a rear axle, and a brake panel mounting flange are formed separately from carbon steel, A brake panel mounting flange is welded to the edge of the rear axle, and the fixing parts of the left and right rear spindle ends are fitted into the cylindrical rear axle. A mounting structure for an axle of a rear two-wheeled vehicle, characterized in that a spring end, a fixing part of the rear spindle, and a rear axle are mutually fastened by a bolt passing through these three parts. (2) The axle mounting structure for a rear two-wheeled vehicle according to claim 1, wherein the rear axle is a rectangular tube with a rectangular cross section with its long side located in the horizontal direction.