JPH0115650B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compactor using impact rollers.

The term "impact roller"
No. 2,909,106 and corresponding patent applications in other countries, as used by the applicant in U.S. Pat. This refers to a non-circular impact member that continuously applies impact force while being towed. The impact member or roller is relatively narrow, on the order of 1.5 meters wide, and is surrounded by a frame of drawbar members.

This type of impact roller has the disadvantage that, due to its narrow width, its width is significantly narrower than the track width of the towing vehicle, and it cannot compact the entire width over which the towing vehicle travels. Ta. Therefore, when compaction work is carried out on an embankment, uncompacted soil remains along the edge of the embankment with a width of more than 1 m, and it is necessary to compact it afterwards using another machine. It was hot.

An object of the present invention is to provide a compactor that eliminates these drawbacks.

The compactor of the invention is characterized in that it has an axle mechanism and at least two laterally separated impact rollers attached to the axle mechanism.

In order to facilitate the operation of the compactor, both impact rollers have substantially the same shape and are held by an axle mechanism so that they can rotate substantially synchronously with each other. Thus, in the present invention, the axle mechanism transmits bending and torsion forces between mutually separated impact rollers, so that the two rollers rotate synchronously.

In one embodiment of the present invention, the axle mechanism includes a bearing mechanism and a shaft rotatably supported by the bearing mechanism and having two impact rollers fixed at both ends thereof. In this type of structure, between two impact rollers,
Requires a shaft capable of transmitting bending and torsional forces.
Since the two impact rollers need to rotate differently from each other within a certain limit, for example when the compactor changes direction, the shaft needs to have a certain elasticity; It also needs to be strong enough to withstand the stress fluctuations that occur during operation. In order to satisfy these two contradictory demands, a precise engineering design is required.

The present invention also includes other structures that prevent excessive axial stress. However, the axle mechanism is 2
It is preferable to provide two stub shaft mechanisms that rotatably hold the two impact rollers, and a restraint mechanism that connects the two impact rollers and rotates them substantially synchronously. With this structure, the stub shaft transmits the bending moment, and the restraint mechanism transmits the torsional force between both impact rollers.

Each stub shaft mechanism can be comprised of a tubular member and a bearing mechanism that rotatably supports each impact roller. The restraint mechanism can be formed by a shaft that is rotatably inserted into the inner bore of the tubular member and has an impact roller fixed to each of its opposite ends.

In the compactor of the present invention, for each impact roller,
A first holding mechanism coupled to both the impact roller and each shaft end is installed, so that even if a failure occurs in the stub shaft mechanism, the impact roller will not come off.

Similarly, the compactor of the present invention may be equipped with a second retention mechanism for each impact roller that couples the dual forces of the impact roller and each stub shaft mechanism to retain the impact roller to the stub shaft mechanism.

In order to reduce stress on the axle mechanism, the connection point between the impact roller and the axle mechanism is located close to the center of gravity of the impact roller. For this reason,
Each impact roller has a hub mechanism fixed to the axle mechanism so that the hub mechanism is located near the center of gravity of the impact roller.

The hub mechanism includes a first member fixed to each impact roller, a second member fixed to the axle mechanism, and a buffer mechanism coupling the first and second members. This buffer mechanism reduces the stress transmitted from each impact roller to the axle mechanism.

To increase the ability of the compactor of the present invention to compact the ends of the embankment, a skirt member may be used, which skirt member is removably attached to the outside of one of the impact rollers. This skirt member is
An embankment forming surface is formed that protrudes outward relative to the impact surface of the impact roller.

The compactor of the invention may be equipped with a traction mechanism coupled to the axle mechanism, which traction mechanism is equipped with a ground contact wheel in a position between the impact rollers. This ground wheel forms part of a chassis that is towed by a tractor. Then, when the tractor turns sideways, the traction mechanism operates through the chassis to guide the axle mechanism and the shock rollers attached thereto into the sideways bend through a shifting action. The chassis ground wheels will slip somewhat laterally on the ground during this conversion motion, but if the ground wheels are located directly below the axle mechanism connecting the pair of shock rollers, they will slip more or less sideways on the ground. The extent of this decreases.

The chassis is stabilized because it is supported by ground wheels, and on this chassis a traction mechanism with springs and damping mechanisms belonging to the art of designing impact rollers may be mounted.

If the ground contact wheels are formed to have sufficient strength, the entire axle mechanism to which the impact rollers are attached can be lifted and held, making it possible to tow the compactor on a highway.

On the other hand, the axle mechanism and the tractor may be directly connected by the traction mechanism without being attached to the chassis towed by the tractor.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show a first embodiment of a compactor according to the present invention.

The illustrated compactor has a traction chassis 10 with two ground wheels 12 and 14 and a coupling mechanism (not shown) at the front end. This connection mechanism is used to connect the vehicle to a towing vehicle, that is, a tractor.

The traction chassis 10 is connected to an axle mechanism 18 by a link 16. This axle mechanism has a tube body 24
and two pull rod members 20 fixed to the tube body.
and 22. A shaft 26 is rotatably supported within this tubular body 24 by a bearing 28 .

Both ends of the shaft 26 protrude from the tube body 24,
Each of the ends of the shaft is formed into a tapered shape, and
A keyway 30 into which a key 32 is fitted is formed.
This key also connects with a first flange 34 held on the shaft end by a nut 36.

This first flange 34 forms part of a hub mechanism (generally designated 38) of an impact roller 40 having four impact surfaces. Hub mechanism 38
has a second flange 42 on a plane passing through the center of gravity of the impact roller 40. In the embodiment shown in FIG.
These two flanges are directly fastened together with bolts, but in the embodiment shown in the third figure, these two flanges 34 and 42 are connected by passing the bolt 44 through the rubber packing 46 and the rubber washer.
connected to each other.

In use, traction forces are applied to the compactor via the traction chassis 10. That is, traction force is transmitted by link 16 to drawbar members 20 and 22.
Since the link 16 is configured to withstand torsion, lateral steering forces are transmitted to the drawbar member and then to the tube 24, the shaft 26 and the impact roller 40.

The shaft 26 rotates the left and right impact rollers in unison or synchronization with each other. The bending force applied to the shaft 26 during movement is such that the shaft is located at the attachment line of the impact roller, i.e.
Bearing 28 provided close to the mounting surface of flange 40
This is significantly reduced because it is supported by The bending force acting on the shaft is also caused by the fact that the second flange 42 is on a plane passing through the center of gravity of the impact roller 40.
Reduced. Therefore, no excessive stress is created on the shaft.

Stress reduction is also provided by the buffer packing 46 and washer 48 attached to the hub mechanism 38. These packings and washers allow impact loads to be applied between the first flange 34 and the second flange 42.
That is, the impact is prevented from being transmitted between the shaft 26 and the impact roller.

As is clear from FIG. 2, since the impact rollers 40 are installed at intervals in the lateral direction,
The compacted area on the embankment surface where the compactor travels will protrude outside of the area where the towing vehicle travels. Therefore, the impact roller is
The edges of the embankment can be compacted. In addition, the second
Compaction efficiency can be improved by using a compaction skirt 50 as shown in the figure. skirt 5
0 has a compaction or fill-forming surface 52 that projects outwardly relative to the impact surface 54 of the impact roller 40 . The skirt is removably attached to the outside of the impact roller by bolts 56. The fill-forming surface 52 of the skirt is formed at an angle 58 to the horizontal to match the desired slope angle of the fill.

Although the spring mechanism 60 connecting the axle mechanism 18 and the traction chassis 10 is schematically shown in FIGS. 1 and 2, the spring mechanism 60 that is illustrated does not represent the spring mechanism that is actually used. The spring mechanism 60 may be any suitable mechanism such as a spring combined with a shock absorber, and serves to provide elasticity to the traction force and at the same time to buffer shock loads generated between the axle mechanism and the chassis 10 while the compactor is running. It is for.

The second part of the compactor shown in Figures 4 and 5
This embodiment has the same effect as the previous embodiment when used to densify embankments, but the embodiment shown in Figures 4 and 5 is suitable for this type of application. Not limited. The compactor in the second embodiment includes two pentagonal impact rollers 70 and 7 rotatably supported by an axle mechanism 74.
2 are laterally spaced apart. A drawbar member 76 projects from the axle mechanism 74 and is used to apply traction to the compactor. As schematically shown in the accompanying drawings, a spring mechanism 78 may be used as in the first embodiment to elasticize and dampen the force applied between the compactor and the tractor.

The axle mechanism 74 has a tubular member 80, and a stub shaft 82 is formed at each end of the tubular member 80. A bearing 84 is attached to each stub shaft, thereby rotatably supporting a hub 86 of each impact roller 70. A retaining plate 88 is bolted to the end of the stub shaft 82 to prevent the hub 86 from becoming dislodged from the stub shaft 82.

A shaft 90 is inserted into the tubular member 80 . This shaft rotates without interlocking with the tubular member, and both ends thereof protrude from both ends of the stub shaft 82. A keyway 92 is formed at each shaft end, into which a key 94 is fitted. An outer hub 96 having a flange is formed with a keyway 98 corresponding to the keyway 92 to fit with the key 94, and the outer hub is bolted to the hub 86. The shaft end projects from the outer hub 96, and a retaining plate 100 is secured to this shaft end by a nut 102.

The structure of the axle mechanism 74 is such that a tubular member 80, ie, a stub shaft 82, hits two impact rollers 70 and 7 while traveling.
It shall be possible to transmit the bending moment that occurs between the two. When the tubular member 80 does not have the shaft 90,
The tubular member is not used to rotate the impact rollers synchronously, and both impact rollers can rotate independently of each other on their respective stub axes.

By using the shaft 90, a torsional moment is transmitted between both impact rollers, resulting in synchronous rotation of both rollers. Since the shaft is fixed to each impact roller by means of a key, the mutual rotational movement that occurs between both rollers is brought about by the resiliency of the shaft 90 against torsional forces.

In the second embodiment of the present invention, as in the first embodiment, a hub mechanism is attached to each impact roller so that the roller is supported by the shaft approximately at its center of gravity. Therefore, stress will be reduced.

Retainer plates 88 and 100 are provided to increase the safety of the compactor. That is, the stub shaft 8
2, the retainer plate 100 will
The connection of each roller to the shaft is maintained to prevent the impact roller from becoming dislodged from the axle mechanism. In addition, if the shaft 90 breaks down, the retaining plate 8
8 connects each impact roller to the axle mechanism 74.

In a second embodiment shown in FIGS. 4 and 5, the drawbar member 76 is replaced by
A wheeled traction chassis as shown in the figure may also be used. Similarly, an impact member may be used to connect the impact roller rim 104 and hub 86. Furthermore, a skirt 50 as shown in FIG.
Of course, it may be attached to the compactor of the second embodiment.

In embodiments of the invention, the compactor is capable of densifying the ground outside the track on which the tractor is traveling. Therefore, the compactor of the present invention is effective for compacting the ends of embankments. Furthermore, the impact rollers are spaced apart from each other, which provides a stabilization of the compactor so that it can be used even on steep slopes.

As described in detail above, the present invention provides synchronous rotation of the rollers and also allows a certain degree of asynchronous rotation, so that no extreme load is placed on the towing vehicle.

[Brief explanation of drawings]

FIG. 1 is a side view of a first embodiment of the compactor according to the present invention, FIG. 2 is a partially sectional plan view of the compactor shown in FIG. 1, and FIG. FIG. 4 is a side view of a second embodiment of the compactor according to the present invention, and FIG.
FIG. 5 is a partially sectional plan view of the compactor shown in FIG. 4; 10... Chassis, 12, 14... Ground wheel,
18...Axle mechanism, 20, 22...Tension rod member, 26...Shaft, 28...Bearing, 38...Hub mechanism, 40...Impact roller, 46, 48...Buffer member, 50...Skirt member , 70, 72... impact roller, 74... axle mechanism, 82... stub shaft,
86, 96...hub, 88,100...retention plate.

Claims (1)

[Claims] 1 Chassis 10, 7 towed by a traction device
6, and an axle mechanism 18 connected to this chassis.
74, and non-circular impact rollers 40, 70 supported by this axle mechanism, moved by a chassis, and rotated relative to the chassis, new impact rollers 40, 72 of approximately the same non-circular shape are used. , which is supported by the axle mechanisms 18 and 74 and also moves and rotates,
These two impact rollers rotate substantially synchronously with each other, but mechanisms 26, 46, 48, and 92 are provided that have elasticity against torsional forces so that they can move out of synchronization to some extent in response to torsional forces. An impact compactor characterized by: 2 The axle mechanism 18 has a set of bearings 28 at each end.
A tubular member 24 supporting the shaft 2 and a shaft 2 attached to the bearing.
6, which is elastic against torsional force and has impact rollers 40 fixed to both ends thereof. 3 The mechanism that has elasticity against the torsional force is
The impact compactor according to claim 1, further comprising deformable members (46, 48) provided between fixing mechanisms (34, 44, 42) for holding the impact roller (40) on the axle mechanism (18). 4. The axle mechanism 74 includes two shafts 82 that each rotatably support an impact roller, and
The impact compactor according to claim 1, further comprising a mechanism that connects these two impact rollers and has elasticity against torsional force. 5. Each of the shafts 82 has an impact roller 70, 72
A tubular member 8 supporting a set of bearings 84 with attached
0, and the mechanism for connecting the impact rollers to each other consists of a shaft 90 provided in the inner hole of a tubular member and having elasticity against torsional force, and these two impact rollers are each fixed to one end of the shaft 90. A compactor according to claim 4, characterized in that: 6. A claim characterized in that each of the impact rollers is provided with a first holding mechanism 100 that prevents the impact roller 70 from coming off from the end of the shaft 90 when the shaft 82 supporting the impact roller fails. The compactor according to range item 5. 7. Each of the two impact rollers is configured such that if the shaft 90 having elasticity against the torsional force fails,
Claims 5 or 6 include a second holding mechanism 88 that prevents the impact roller from coming off the shaft 82 to which the impact roller is attached.
The compactor described in section. 8. Each of the impact rollers comprises a hub member 42 located substantially in a plane passing through the center of gravity of the impact roller 40 and fixed to a support structure 34 attached to the axle mechanism 18. A compactor according to any one of Ranges 1 to 7. 9. The compactor according to claim 8, wherein deformable members 46 and 48 are provided between the hub member 42 and the support structure 34. 10 Each of the impact rollers 70, 72 is characterized in that it comprises a hub 86 mounted on two bearings 84 located approximately centrally relative to a plane passing through the center of gravity of the impact roller and located on either side of this plane. A compactor according to any one of claims 1 to 7. 11 A skirt 50 is removably attached to one outer surface of the impact roller 40, and a skirt 50 is attached to the skirt.
Claims 1 to 10 are characterized in that an embankment forming surface 52 is provided that projects outwardly away from the impact surface 54 of the impact roller.
A compactor as described in any of the paragraphs. 12 The chassis 10 has the impact roller 40
12. A compactor according to any one of claims 1 to 11, characterized in that it comprises ground contact wheels 12, 14 located between them. 13. The grounding wheels 12, 14 are capable of supporting the weight of the impact roller 40, and are provided with a mechanism that lifts the impact roller provided on the chassis 10 above the ground level. The compactor according to range 12. 14 The chassis 10, 76 and the axle mechanism 18,
Each tip of 74 is connected to the impact roller 40, 70, 7
14. The compactor according to any one of claims 1 to 13, wherein the compactor is located inside the outer end of the compactor.