JPS59134066A - Suspension for caterpillar truck - Google Patents

Abstract

PURPOSE:To improve comfortability of car by providing means for buffering the motion of a movable side member between said member and chassis. CONSTITUTION:Under travel, the rear end side of truck frame 5 is pushed downward through function of a buffer means 20 to separate a caterpillar 27 applied on the lower side of sprocket 25 from tooth section of sprocket 25. Consequently the sprocket 25 and decelerator are protected from shock to improve durability. While since the truck frame 5 rolls up and down, travel safety is improve and since shock or vibration to be applied from ground face is damped by a buffer means 20 provided between the frame 5 and chassis 1 and a buffer member provided between the chassis 1 and each link 4, comfortability is improved considerably.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tracked vehicle suspension system that swingably supports one side of seven track frames in the running direction of a tracked vehicle.

Conventional suspension systems for tracked vehicles include those in which the track frame is completely fixed to the vehicle body (first conventional example), and those in which the front side of the track frame is swingably supported by an equalizer bar, and the track frame is The rear end side is rotatably supported on a pivot shaft (second conventional example), and the lower roller is elastically supported on the truck frame in addition to the structure of the suspension system (third conventional example). etc. are publicly known. But first. In the conventional truck frame fixed to the vehicle body, the impact from the road surface is directly transmitted to each part, resulting in poor ride comfort and durability.For this reason, the second conventional truck frame was Tracked vehicles often support the front end with an equalizer bar and the rear end with a pivot shaft, but this has a lower ride quality and is less comfortable than one in which the lower wheels are supported elastically on the track frame. Inferior in terms of durability.

The third conventional example is superior to the above three in terms of ride comfort and durability, but it has a complicated structure and is expensive, and the car body becomes unstable during work, resulting in poor workability. What were the drawbacks?

This invention was made with the aim of improving such drawbacks, and the tip of a swing link that pivots one side in the running direction of the truck frame located on both sides 11 of the vehicle body to a pivot shaft protruding from the vehicle body. A buffer means is provided between the trunk frame or a movable member such as a swing link connected to the trunk frame and the vehicle body to loosen the movable member. The other side of the frame is provided with a suspension system for a tracked vehicle that is swingable in the vertical direction via the tip of a link that is swingably supported independently on the left and right sides of the front part of the vehicle body. The aim is to improve driving stability and ride comfort.

An embodiment of the present invention will be described below based on the drawings.

In the figure, 1 is the body of a tracked vehicle, and a link support member 2 is protruded from the lower part of the front side of the vehicle body 1 in the running direction (left side in Figures 1 and 2), and the center of the link support member 2 is A pin 3 is horizontally suspended in the section. The inner ends of a pair of left and right independent links 4 are supported by this pin 3 via spherical bearings 4α. The other end of each link 4 passes through the underside of the vehicle body 1 and protrudes from both sides of the vehicle body 1, and a bracket 4b is protruded from the middle of each link 4, and pins 40 are horizontally mounted on these brackets 4h. has been done. Each pin 4 above
One end of a buffer member 42 is pivotally attached to the 0 via a spherical bearing 41. The buffer member 42 is, for example, a pneumatic suspension cylinder, and the other end is connected to the vehicle body 1.
The buffer member 42 is pivotally connected via a spherical bearing 44 to a pin 43 of a bracket 1α protruding from both sides of the buffer member 42, and a high-pressure gas for a buffering effect is filled in the buffer member 42.

Note that 45 in the figure is a stopper.

On the other hand, 5 is a truck frame located on both sides of the vehicle body 1.
An idler 6 is supported at the front end of the track frame 5 via a bracket 7. The bracket 7 is connected to an idler biasing device 8 provided on the truck frame 5, and the idler biasing device 8 biases the idler 6 forward. 9 is a rod of the idler urging device 8 that connects the idler urging device 8 and the bracket 7 and moves together with the bracket 7;
This rod 9 is provided parallel to the trunk frame 5. The outer end of the link 4 is connected to the rod 9 via a spherical bearing 10 so as to be movable in the front-rear direction (in the axial direction of the rod 9) and swingable in the up-down direction.

On the other hand, the rear of the vehicle body 1 (@1, right side in Figure 2)
Pivot shafts 15 are protruded from both sides, and one end of a swing link 16 is rotatably supported by these pivot shafts 15. The other end of the swing link 16 extends rearward above the truck frame 5, and the end thereof is pivoted via a shaft 18 to a bracket 17 projecting from the upper rear surface of the truck frame 5. It is freely supported. As a result, the front side of the track frame 5 swings vertically independently on the left and right around the pin 3 that supports the link 4, and the rear side swings through the swing link 16 that swings around the pivot shaft 15. The pivot shaft 15 can be freely swung vertically.
When the rear side of the truck frame 5 swings vertically around , the spherical bearing 10 provided on each link 4 slides on the rod 9 to prevent the front side of the truck frame 5 from moving back and forth with respect to the link 4. It is supposed to be absorbed by doing so.

Further, the rear side of the truck frame 5 is elastically supported by the vehicle body 1 via a buffer means 20.

The buffer means 20 is, for example, a hydropneumatic suspension cylinder 21 as shown in FIG.
The base end side of the cylinder 21 is pivotally connected to the vehicle body 1 by a pin 22. The suspension cylinder 21 is an outer cylinder 21
An end plate 21C attached to the outer cylinder 21α side is provided between the outer cylinder 21α and the inner cylinder 21h so as to slide on the outer peripheral surface of the inner cylinder 21b. A high pressure gas acting as a spring is sealed in the cylinder 21A, and the inner cylinder 21
A query ring 2 having a check valve 2i on the upper end side of A.
1e is installed. The tip of a rod 21f protruding from the lower end of the inner cylinder 21h is rotatably connected to the rear side surface of the truck frame 5 by a pin 23, and the rear side of the truck frame 5 is connected to the vehicle body. A sprocket 25 is attached to a final reduction gear shaft 24α that projects from the final reduction gear 24 provided on both sides of the rear portion of the motor. Also, a plurality of lower wheels 26 are provided on the lower surface of the truck frame 5.
are attached at intervals in the longitudinal direction, and an endless crawler belt 27 is wound between these lower wheels 26, the sprocket 25, and the idler.

Note that 28 is a stopper that comes into contact with the rear upper surface of the swing link 16 to restrict the vertical movement limit of the rear side of the track frame 5.

In the above configuration, when a load from the ground acts unevenly on the track frame 5 in the longitudinal direction via the crawler belt 27, the front and rear of the track frame 5 swings in the vertical direction, and this swing causes the shock absorbing means 20 to buffered.

Note that the suspension system for a tracked vehicle according to the present invention is not limited to the configuration shown in the above embodiment, but includes the configuration shown below.

That is, the rod connecting the tips of each link 4 is not limited to the rod 9 of the idler biasing device 8, and the rods shown in FIG.
As shown in FIG. 8, another rod 9' is attached to the truck frame 5 in the longitudinal direction of the truck frame 5.
．． 29, and the tip of the Eliza bar 4 may be connected to this rod 9' via a spherical bearing 10 so as to be movable in the front-back direction of the track frame 5 and swingable in the vertical direction. The rod 9' may be located between the yokes of the bracket 7', but it may also be located at a position shifted from this position, for example, inside the track frame 5. The other end of the swing link 16 pivoted on the pivot shaft 6 is pivoted toward the rear of the truck frame 5, and a bracket 17 protruding from the track frame 5 is connected to the tip of the swing link 16 via the shaft rod I8. However, the other end of the swing link 16 may be pivotally supported toward the front side of the truck frame 5, and the bracket of the truck frame 5 may be connected to this.

Further, the buffer means 20 includes a metal spring 3 as shown in FIG.
Alternatively, as shown in FIG. 10, an elastic body 31 such as hard rubber may be interposed between the connecting portion of the swing link I6 to the track frame 5 side and the stopper 28. Therefore, this elastic body 31 may be provided with a shock absorber.

On the other hand, in the above embodiment, the buffer member 4-2 is a suspension cylinder, but a coil spring may also be used as shown in Fig.

Furthermore, in the above embodiment, the inner end of each link support member 2 is provided at the center of the link support member 2 and pivoted to the link support member 3, but as shown in FIGS. If a pair of pins 3 are provided on both ends of the holder, and the inner ends of the links 4 arranged alternately are pivotally connected to these pins 3, the swing angle of each link 4 can be increased. This has the effect of reducing the amount of toe-in of the trunk frame 5.

The suspension system for a tracked vehicle according to the present invention is as described in detail above, and a pivot shaft protruding from the vehicle body I connects one side of each track frame 5 in the traveling direction located on both sides of the vehicle body V. The movable side is rotatably connected to the tip of the swing link 16 pivotally supported on the vehicle body 1, and is connected between the movable side member for the vehicle body 1, such as the truck frame or the swing link 16 connected thereto, and the vehicle body 1. A buffer means is provided to dampen the movement of the members, and the outer ends of single-cell links 4, which are provided on one side of the truck frame 5 and the front of the vehicle body 1 so as to be swingable on the left and right independently, are rotatable. Since the rear end side of the seat rack frame 5 is pushed downward by the action of the buffer means 20 during running, the crawler track 27 wound around the lower side of the sprocket 25 is separated from the teeth of the sprocket 25. It is in a state of being. This prevents the impact caused by the undulations of the road surface from being directly transmitted to the sprocket 25.
The sprocket 25 and the final reduction gear 24 are protected from these impacts, and durability can be improved. In addition, since the front and back of the truck frame 5 swings vertically in response to the undulations of the road surface while driving, driving safety is improved, and shocks and vibrations caused by the road surface are damped by providing a structure between the truck frame 5 and the vehicle body 1. Since the buffer member 42 provided between the buffer means 20 and the vehicle body 1 and each link 4 alleviates the damping, the riding comfort of the vehicle can be greatly improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a side view, FIG. 3 is a view taken from the direction shown in FIG. FIG. 5 is a perspective view of the main part, FIG. 6 is a sectional view of the suspension cylinder, and FIGS. 7 to 13 are explanatory views showing other embodiments. 1 is a vehicle body, 4 is a link, 5 is a truck frame, 15 is a pivot shaft, 16 is a swing link, and 20 and 42 are buffer means. Applicant Komatsu Ltd. Representative Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Flood Figure 5 Ikonichi Figure 6

Claims (1)

[Claims] A pivot shaft 1 projecting from the vehicle body I connects one side of each truck frame 5 located on both sides of the vehicle body 10 in the running direction.
It is rotatably connected to the tip of the swing link 16 pivotally supported on the vehicle body I, and is connected between the vehicle body I and a movable side member relative to the vehicle body I, such as the truck frame 5 or the swing link 16 connected thereto. A buffer means 20 is provided to buffer the movement of the movable side member, and a pair of left and right independent links 4 are provided at the front of the vehicle body 1, one end of which is rotatably pivoted to the vehicle body 1 side. The other end side is connected to the truck frame 5 via a bearing so that it can move freely in the traveling direction and rotatably in the vertical direction, and also connects the vehicle body 1 and each of the links 4 mentioned above.
A suspension system for a tracked vehicle in which a buffer member 42 is interposed between the suspension members.・