JPS6123451Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a suspension system for two or more axles of an automobile.

[Conventional technology]

2. Description of the Related Art Conventionally, as a suspension system for a multi-axle vehicle having a relatively simple structure and light weight, a suspension system using flexible members such as wires has been proposed in Japanese Patent Laid-Open No. 51-31414. In this prior art, a pulley for spanning and supporting a flexible member is attached to an axle and a chassis. The flexible member is in contact with the pulley under tension, but when the wheel bounces, it may partially loosen and come off the pulley, but no consideration has been given to this point. .

[Problem that the invention attempts to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide a suspension system for a vehicle that has a simple configuration, ensures the ability of a flexible member to follow a pulley, and prevents the flexible member from coming off the pulley.

[Means for solving problems]

In order to achieve the above object, the present invention has a configuration in which a first pulley is supported on each of a plurality of axles, a second pulley is supported on a chassis alternately with the first pulley in the same vertical plane, A flexible member is stretched over the first pulley and under the second pulley, and rods connected to both ends of the flexible member are each slidably supported on a bracket of the chassis. , a bracket for supporting the first and second pulleys is constituted by a horizontal plate projecting laterally from the axle or chassis, and a pair of vertical plates fixed to the horizontal plate and extending in the front-rear direction; The pulley is rotatably supported between a pair of vertical plates, and a stopper is provided in the pair of vertical plates opposite to the outer peripheral surface of the pulley with a gap narrower than at least the diameter of the flexible member from the outer peripheral surface. This is what I supported.

[Function] The rebound of the rear wheel instantly causes the flexible member 14 to
Even if the pulleys 15, 16 are loosened, the stoppers 3 provided on the brackets 18, 19, 17 of the pulleys 15, 16
9, 45 and 60 prevent the flexible member 14 from coming out of the pulley groove. This maintains smooth movement between the flexible member 14 and each pulley.

[Example of idea]

The configuration of the present invention will be explained based on an example.
As shown in FIG. 1, the chassis 2 is made up of frames 4 connected in a ladder-like manner by horizontal members 5.
In this case, a portion of the frame 4 that supports the front wheel 3;
The parts that support rear wheels 7 and 8, which are drive wheels, are straight.

The suspension system 12 includes a plurality of first pulleys 16 supported by the axles 10 and 11, respectively, and disposed outside the frame 4 and inside the rear wheels 7 and 8.
, a plurality of second pulleys 15 arranged in the same plane as the first pulley 16 and arranged outside the frame 4 alternately with the first pulley 16;
passes above the second pulley 16 and the second pulley 15
It consists of a flexible member 14, such as a wire or chain, which is supported by damper devices 13 attached to the frame 4 at both ends. Note that the tension angle θ (sixth
(Figure) is configured at an angle of approximately 30°.

As shown in FIG.
7 with an axis 26 parallel to the axle. The second pulley 15 is rotatably supported by brackets 18 and 19 fixed to the frame 4 with a shaft 25.

The axles 10, 11 are connected to each other by a support member 20 provided at the lower end of the bracket 18 disposed between them, and a torque rod 29 extending in the front-rear direction. The driving force is transmitted to the chassis 2 via the torque rod 29. As shown in FIG. 3, the bracket 18 includes a contact plate 32 overlap-welded to the outer surface of the frame 4 having a U-shaped cross section, and a contact plate 33 overlap-welded to the lower wall surface of the frame 4 so as to cross each other. Furthermore, a reinforcing rib 31 made of a triangular plate is inserted between the two.
to weld. A pair of support plates 34 parallel to the side walls of the frame 4 are welded to the lower surface of the contact plate 33, and a connecting plate 39 serving as a stopper is disposed at the lower end thereof facing the outer periphery of the pulley 15. Ribs 43 and 35 are connected to each other, and ribs 43 and 35 are provided on the outer surface of each support plate 34.
are connected by welding.

Note that the outer peripheral surfaces of the connecting plate 39 and the pulley 15 are
The gap is narrower than at least the diameter of the flexible member 14.

A bearing 38 is fixed in a hole provided in the support plate 34,
And the pulley 15 arranged between the support plates 34 is connected to the shaft 25.
is supported by the bearing 38. And axis 2
A holding plate 36 is placed on both ends of the shaft 25, and the shaft 25 is fixed to the bearing 38 with a bolt 37 to prevent it from coming off. A plain bearing 21 is fitted into the inner peripheral surface of the shaft hole of the pulley 15, and both end surfaces thereof and the bearing 3
A thrust washer 22 is disposed between the sliding part 8 and the sliding part 8, so that a lubricant such as grease can be supplied to the sliding part from a nipple 42.

A support member 20 having an inverted U-shaped cross section is overlaid and coupled to the lower surface of the connecting plate 39.
One end of the torque rod 29 is connected to the torque rod 29.

As shown in FIG. 4, the structure of the bracket 19 is almost the same as that of the bracket 18, and similar constituent members are designated by common reference numerals and explanations thereof will be omitted. However, the stopper 4 provided at the lower end of the support plate 34
The configuration of bracket 5 is different from that of bracket 18. That is, the flexible member 1 is stretched over the lower side of the pulley 15.
The stopper 45 for preventing 4 from coming off is constructed by arranging a sleeve 47 between a pair of support plates 34, inserting a bolt 46 through the support plate 34 and the sleeve 47, and tightening a nut 48. , the gap between the sleeve 47 and the outer peripheral surface of the pulley 15 is made narrower than the diameter of the flexible member 14.

The bracket 17 supported on each axle 10, 11 is the same and is constructed as shown in FIG. That is, to explain the case of the axle 10, a connecting plate 53 is attached to the upper end wall of the axle 10.
A pair of supporting plates 54 are coupled to this, and a narrow plate 59 extending in a direction perpendicular to the axle 10 is coupled to the upper end of the supporting plate 54. A reinforcing rib 55 is coupled to the outer surface of each supporting plate 54. A shaft hole is provided in the center portion of the support plate 54, and a bearing 58 is coupled to the shaft hole. Then, a triangular rib 51 is connected between the bearing 58 and the connecting plate 53. A pulley 16 placed between a pair of support plates 54 is rotatably supported by a shaft 26, and the shaft 26 is fitted into a bearing 58. A presser plate 56 is placed on both ends of the shaft 26, and a bolt 57 is inserted. It is fixed to the bearing 58.

A plain bearing 23 is fitted into the inner peripheral surface of the shaft hole of the pulley 16, and both end surfaces thereof and the bearing 5
A strut washer 24 is disposed between the sliding part 8 and the sliding part 8 so that a lubricant such as grease can be supplied to the sliding part from the outside through a nipple 62.

In order to prevent the flexible member 14 stretched over the pulley 16 from coming off, a stopper 60 is stretched between the plates 59 at the top ends of the pair of support plates 54, and they are connected using bolts 61. The gap between the stopper 60 and the outer peripheral surface of the pulley 16 is formed by the flexible member 14.
Similarly to the case of the pulley 15, the diameter is narrower than the diameter of the pulley 15.

The damper device 13, which supports both ends of the flexible member 14 on the frame 4, includes a rod 79 connected to the end of the flexible member 14, a bracket 84 fixed to the frame 4, as shown in FIG. It consists of a spring 78 surrounding a rod 79. A spring seat 81 is coupled to the end of the bracket 84, while a spring seat 76 is supported by a nut 72 on the distal end side of the rod 79, and a spring 78 is inserted between the spring seat 76 and the spring seat 81. Intervened.

Next, we will explain the operation of the device of the present invention.
As shown in FIGS. 2 and 6, the flexible member 14 is attached to pulleys 1 of brackets 18 and 19 fixed to the frame 4.
5 and the upper side of the pulley 16 of the bracket 17 fixed to the axles 10, 11, and both ends are supported by the frame 4 with the damper device 13, so that the load on the vehicle body is reduced. It acts to push down the flexible member 14 via the pulley 15, and further pushes down the bracket 17 via the pulley 16.
The axles 10, 11
Supported by

When one of the rear wheels 7, 8, for example, the rear wheel 7 runs onto a bump in the road surface, the axle 10, the bracket 17, and the pulley 16 are pushed up against the frame 4, thereby changing the tension angle θ of the flexible member 14. Then, attach the bracket 1 with the pulley 16.
7 and axle 11 are pushed down. In this way, both the rear wheels 7 and 8 are maintained in contact with the ground, and the load of the vehicle body is evenly applied to the rear wheels 7 and 8.

When the wheels 7 and 8 suddenly run onto a step on the road surface, the rod 79 connected to the flexible member 14 resists the spring 78 of the damper device 13 against the impact load applied to the end of the flexible member 14. The flexible member 14 is moved diagonally downward to temporarily extend the flexible member 14 and alleviate the impact.

Partial loosening or tension that occurs in the flexible member 14 is eliminated by the damper device 13 that supports both ends of the flexible member 14 on the frame 4 with the rotation of the pulleys 15 and 16, and the tension in the flexible member 14 is always maintained. The force remains approximately constant.

However, if the flexible member 14 momentarily becomes partially loosened due to rebound of the rear wheel, the pulley 1
There is also a risk that the flexible member 14 may come off from the parts 5 and 16.

[Effect of idea]

According to the present invention, as described above, the pulley 1
With the stoppers 39, 45 and 60 provided on the brackets 18, 19 and 17 of 5 and 16, respectively, the gap between the outer peripheral surface of each pulley and the stopper is made narrower than the diameter of the flexible member 14. Even if the flexible member 14 becomes loose, it will not come off the pulley.
In this way, since the flexible member 14 is guaranteed to follow the pulley, it supports only the load in the vertical direction of the vehicle body, and the load due to driving force, braking force, etc. is received by the torque rod.
An excellent effect is obtained in that the flexible member can be protected from excessive impact loads.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a chassis equipped with a vehicle suspension system according to the present invention, Fig. 2 is a side view of the same suspension system, Fig. 3 is a front sectional view of a bracket supporting a pulley on the frame side, and Fig. Fig. 4 is a front sectional view of another bracket that supports the pulley on the frame side, Fig. 5 is a front sectional view of another bracket that supports the pulley on the axle side, and Fig. 6 shows the main points of the suspension system according to the present invention. It is a side view which expands and shows a part. 2... Chassis, 3... Front wheel, 4... Frame, 5... Lateral member, 7, 8... Rear wheel, 10, 11
... Axle, 12 ... Suspension device, 13 ... Damper device, 14 ... Flexible member, 15, 16 ... Pulley, 17-19 ... Bracket, 25, 26 ...
Shaft, 29... Torque rod, 34, 54... Support plate, 38, 58... Bearing, 39, 45, 60...
Stoppa, 78...spring.

Claims (1)

[Claims for Utility Model Registration] A first pulley is supported on each of a plurality of axles, a second pulley is supported on a chassis alternately with the first pulley in the same vertical plane, and a flexible member is supported on the chassis. rods passing above the first pulley and passing below the second pulley and coupled to both ends of the flexible member are slidably supported by brackets of the chassis, respectively; A bracket supporting the second pulley is constituted by a horizontal plate projecting laterally from the axle or chassis, and a pair of vertical plates fixed to the horizontal plate and extending in the front-rear direction, and between the pair of vertical plates. The pulley is rotatably supported, and a stopper is supported on the pair of vertical plates facing the outer peripheral surface of the pulley with a gap narrower than at least a diameter of the flexible member from the outer peripheral surface. Characteristic vehicle suspension system.