JPH0380218B2 - - Google Patents

Description

Description The present invention relates to a device for use in load conveying units, such as excavator bucket carts, wheel tractor bucket carts, trucks, and load conveying forks of wheel tractors.

Conventionally, in this type of load transfer unit, it has often been desired to improve maneuverability. For example, in the case of a bucket cart for an excavator, the ability to rotate the bucket cart relative to the jib means an improvement in maneuverability.
Regarding other cargo transport units, it is desired to improve the degree of freedom of movement; for example, a forklift truck used to transport containers to be opened upwards allows the contents to be taken out in a simple manner. However, the support lift fork is required to be capable of turning or rotational movement. Apart from the redirection or rotational movement, a pendulum movement relative to the rotating surface is also desired, which allows the object to be removed to be released in a better manner during the removal operation.

A known device for rotating the bucket of an excavator relative to a support jib and pendulumally moving relative to a rotating surface is disclosed in Swedish Patent Publication No. 438,882. However, although this conventional device can easily perform a relatively limited rotational movement, it reduces the capacity of the bucket and has the disadvantage that the supporting shaft used is susceptible to wear. Attempts have been made to attach the bucket to a shaft that has cogwheel teeth and is steered by a rack, but this results in the support shaft being deformed or destroyed by the forces applied to the shaft during operation of the bucket. Summer.

It is an object of the present invention to provide a device that achieves maximum movement in a rotating surface and maximum movement during pendulum movement relative to a rotating surface. Another object is to provide an improvement in the support bearing shaft, which is arranged in such a way that it can absorb the vertical and lateral forces that occur and can easily adjust for the reduction of play areas caused, for example, by wear.

The device according to the invention is positioned at an intermediate position between the load transport unit and its support member, and is arranged to prevent rotational movement of the load transport unit relative to the support member in a first plane and, more preferably, in a second plane in an extension of the first plane. It is formed to make a pendulum movement at
The main feature is that a tubular or stud-like member is provided so as to be redirectable or rotatable with respect to a support member, a load carrying unit is suspended near a first end thereof, and a preferably cylindrical member is provided near a second end. A contact member is connected to the disk-shaped member, and the surface facing the load transfer unit is a first contact plane, and the load transfer unit is provided with a contact member, which is opposed to the cylindrical member and is substantially parallel to the first contact plane. the second contact plane and the first above;
Two groups of bearing means are arranged at intermediate positions of the second contact plane, one group of bearing means having an adjustable contact position with respect to the first contact plane, and the other group of bearing means having an adjustable contact position with respect to the second contact plane. Means are provided which are formed to occupy a contact position and enable a preferably counter-rotational movement of the tubular disc-shaped member, thereby allowing a desired redirection or rotational movement of the load carrying unit relative to the support member. There is a particular thing.

An embodiment in which the device according to the present invention is applied to a bucket of an excavation machine will be described in detail below with reference to the accompanying drawings.

1 is a schematic side view of an embodiment of a device according to the invention for supporting a bucket tote on a jib; FIG.

2 is a side view of the apparatus shown in FIG. 1; FIG.

FIG. 3 is a sectional view taken along the - line in FIG. 2.

FIG. 4 is a sectional view taken along the - line in FIG. 2.

FIG. 5 is a perspective view showing a bearing means modified from the bearing means shown in FIGS. 1 and 4 and a wear member associated with the modified bearing means in a separated position.

FIG. 6 is a sectional view of the means shown in FIG. 5 placed in contact with an adjacent contact plane by means of a support shaft;

In FIG. 1, the excavator's jib 10 and bucket dot 12 are shown in chain lines, with the bucket opening facing to the left in the figure. The device according to the invention as a finished product, designated 14, is arranged to facilitate attachment to the jib 10 in a conventional manner by means of a mounting member 16. Mounting member 16 forms the first portion of device 14 and includes two pairs of support members 18 across which shaft 20 is spanned. The second part of the device 14 consists of two plate-shaped members 22 spaced apart from each other and pivotally connected to the shaft 20. Plate member 22
is a plate 2 extending transversely to the plate member 22.
interconnected by 4. The second part of the device 14 extending from the plate 24 in the direction away from the support shaft 20 is a housing arranged for the purpose of protecting the movable parts included in the device 14.

Preferably hydraulic piston cylinder 26
As shown in more detail in FIG. It is located in By manipulating the piston cylinder 26, when the second part of the device 14 is moved relative to the first part, the bucket is caused to oscillate.

The device of the invention also facilitates rotational movement of the bucket bag 12, and how this is accomplished is illustrated in FIGS. 1-3. A screw worm 28 is used for this purpose. A cogwheel 30 disposed on the outer periphery of the cogwheel cooperating with the threaded worm 28 is interconnected with the threaded worm 28 . A cog gear 30 is attached to the first end of the stud member 34 with a screw or bolt assembly;
The other end of the stud-like member is connected to attachment means 36 on bucket 12. Stud-like member 34
is rotatably disposed relative to a surrounding tubular member 34 which is rigidly attached to the rotatable second portion of device 14. A screw worm 28 is also rotatably supported in the second part of the device, which second part is driven by a motor 40. motor 4
By driving the screw worm 28, the cogwheel 30 and the stud-shaped member 3 rotate.
4 and bucket 12 are also rotated. motor 40
By adjusting the rotation speed and direction of
The bucket bag 12 can be rotated in alternating directions at a desired angle, rotational movement can be performed in a desired direction at a desired number of rotations, and the rotational speed can also be changed as required.

In order to absorb the forces and loads occurring during operation of the bucket 12, a plurality of roller members 44, 46 are disposed intermediate positions between the plate 48 of the mounting means 36 and the side surface of the cogwheel facing the plate 48. . In the embodiment shown in FIG.
4 are placed in contact with the plate 48, and four rollers 46 are placed in contact with the sides of the cog gear 30. The number of rollers may vary, but the number of rollers in each contact group should not be less than three. On the other hand, there is no problem even if the number of rollers 44, 46 used in each group exceeds four, and the larger the number, the more advantageous it becomes. As shown in FIGS. 1 to 4, in order to reduce the friction between the stud-like member 34 and the surrounding tubular member 38, a tubular bearing made of, for example, bearing metal is interposed between the two members 34, 38. It's convenient.

Between roller 44 and plate 48 and roller 4
6 and the cogwheel 30, adjustment means 49 are arranged, as shown in detail in FIG. The adjusting means 49 according to this embodiment is constituted by a substantially triangular plate pivotally mounted on the wall of the second part of the device 14, and in this embodiment, as shown in FIG.
It is arranged as a part consisting of several sides on the outer part facing towards. The shafts supporting the rollers 44, 46 at the adjustment means 49 are positioned slightly out of phase with respect to the center of rotation of the wall member for the adjustment means. An eccentric actuation is thus achieved during the pivot movement of the adjustment means 49, with the result that the rollers 44, 46 are moved against the plate 48 or the cogwheel 30. Once a suitable contact pressure has been achieved, the adjustment means 49 are locked in a position determined by the insertion of the stud into the appropriate hole 50. The contact pressure is selected based on the type of work being performed. During work, the rotary movement and the pendulum movement of the bucket 12 can be carried out independently. This is because the means for achieving both movements operate individually. Furthermore, the attachment members 16, 36 facilitate quick conventional attachment of the device 14 to the jib 10 and bucket 12. The device 14 can be made considerably smaller and the space between the bucket 12 and the jib 10 can be minimized. Also, there is no need to provide space for the device 14 in the bucket. The worm gears 28, 30 and rollers 44, 46 are enclosed in a housing and are well protected from dust and damage. roller 4
By virtue of the eccentric actuation to align 4, 46, the rollers are easily adjusted to compensate for any play that may be present, as well as to absorb and distribute over a wide area the forces exerted on device 14 during operation. The applied force is applied to the roller 44,
The way in which relatively large pressures are distributed over the absorbing surface through 46 results in resistance of the device 14 to the forces present and good reliability during operation. .

However, the embodiments shown and described above can be modified to be suitable for other types of machines or load handling units or taking into account various detailed design solutions. In a modification thereof, the rollers 44, 46 are suspended in a different type of eccentrically operated adjusting means, for example, the axes of the rollers 44, 46 are mounted in eccentrically located holes drilled in the cylindrical washer member. The cylindrical washer member can be rotatably disposed in the surrounding cylindrical recess. Also, the method of locking the adjustment means 49 in the desired position can be varied, for example by using locking screws, clamp joints, etc. In some applications, the pendulum motion described may be of minor importance, in which case the elements used to achieve such motion may be eliminated. The method of achieving rotational movement can also vary, e.g. motor 40
Instead of the screw worm 28, a hydraulically or pneumatically actuated piston ring may be mounted on the rack connected to the cog gear 30. In order to reduce the overall weight of the device 14, a rotatable stud-like member 3 is provided.
4 is conveniently arranged as a tubular member.

Roller-shaped members 44, 46 having a cylindrical cross section
, the contact area acting on adjacent contact surfaces is small. Therefore, both the roller-like members 44, 46 and the contact surfaces need to have fairly hard areas in order to avoid plastic deformations caused by the existing contact loads. However, the contact surface of each roller-like member 44, 46 can be significantly enlarged by the modifications disclosed in FIGS. 5-6.

According to this modification, each eccentrically supported bearing means is supported by a support arranged and supported so as to correspond to the roller-like members 44, 46 described in connection with the embodiment shown in FIGS. 1 to 4. It contains body 44. However, this support body 44 is formed integrally with a plane 51, and a groove 52 is provided in the plane, and the groove extends in the same direction as the through hole 53, so that the support shaft 54 can be inserted into the through hole. It is composed of Also shown is a wear member 55 that fits into groove 52 and has an end surface that hugs the sides of groove 52 when inserted. This wear member has two screws 56, 5 as shown in FIG.
It is mounted and held in the groove by 6'.

The support body 44 is pivotally supported by an eccentric portion 57 of a support shaft 54, and the other end portion of the support shaft 54 is connected to an adjustment means 49 forming a plurality of holes 50, as described above with respect to the first embodiment. The two holes are used to lock the adjustment means in the desired position, for example by inserting a screw 58, a stud, or the like.

This modified bearing means makes it possible to increase the contact area between the bearing means and the contact surface. The use of the wear member 55 is convenient because it can be replaced when worn, but the wear member 55 and the groove 52 may be eliminated and a contact surface formed integrally with the support body 44 may be used. That is, the plane 51 may be a continuous plane.

With respect to the removable wear member 55, the wear member 5
By utilizing grooves 52 formed to grip or surround at least two opposite ends of 5, the forces exerted on the wear member during use can be utilized in a better manner. However, this groove 5
It is also possible to exclude 2. However, in this case, it is necessary to attach the wear member 55 in such a manner that the above force can be utilized. As an example of this embodiment, a groove is formed on the surface of the wear member 55 having a width larger than the width of the support body 44 that abuts against the support body 44, and the side part of the groove formed on the wear member 55 is connected to the support body 44. It is also possible to surround the end of the .

The invention is thus not limited to the embodiments shown and described, but may be modified within the spirit of the invention and the scope of the following claims.

Claims (1)

[Scope of Claims] 1. The load transport unit 12 is positioned at an intermediate position between the load transport unit 12 and the support member 10 of the load transport unit 12, and is rotatably moved on the load transport unit 12 in the first plane. A device 14 for a load transport unit 12 arranged for pendular movement in a second plane on the extension of the plane, the tubular or stud-like member 34 being redirectable or rotatable relative to the support member 10. The load conveying unit 12 is suspended near the first end thereof, and the second end thereof is preferably connected to a cylindrical disk-shaped member 30, and the surface facing the load conveying unit 12 is connected to the first end. A contact member 48 is provided on the load conveying unit 12, which serves as a second contact plane that faces the cylindrical member 30 and is substantially parallel to the first contact plane, and a contact member 48 is provided on the load transfer unit 12. two groups of bearing means 44 at an intermediate position;
46 are arranged such that one bearing means group 46 occupies an adjustable contact position with respect to the first contact plane and the other bearing means group 44 occupies an adjustable contact position with respect to the second contact plane; It is characterized in that means 40 are provided for enabling a preferably counter-rotational movement of the disk-shaped member 30, so that the load carrying unit 12 can be turned around or rotated in the desired direction relative to the support member 10. Equipment for load handling units. 2. Each group of bearing means 44, 46 comprises at least three bearing means 44, 46 arranged radially and preferably substantially equiangularly spaced apart. Apparatus according to paragraph 1. 3. The device according to claim 1 or 2, wherein each of the bearing means 44, 46 comprises a roller-like member having a substantially cylindrical cross section. 4. Claims 1 to 3, characterized in that each bearing means 44, 46 consists of a support 44 having a substantially flat bearing surface arranged in contact with an adjacent contact surface. The device described in. 5. The wear member 55 is removably attached to the support 44, and the surface of the wear member 55 facing away from the support 44 is a substantially flat bearing surface and is arranged so as to be in contact with an adjacent contact surface. An apparatus according to claim 4. 6. Forming a longitudinal groove 52 in the support 44 to grip or surround at least two opposing ends of the wear member 55; 6. A device according to claim 4, characterized in that it is configured to grip or surround at least two opposite ends. 7 Bearing means 44, 46 are manually adjustable means 4
9, and the adjustment means allows the bearing means 44,
7. The device according to any one of claims 1 to 6, wherein the device applies an eccentric motion to each contact surface at 46. 8 Forming a locking or blocking means in the manually adjustable adjustment means 49,
8. A device as claimed in claim 7, characterized in that it can be easily locked in a desired adjustment position. 9. The device 14 is pivotally mounted on the support member 10 and is provided with at least one piston cylinder 26, preferably hydraulically operated, to facilitate the pivoting movement of the device 14 so that the load transfer unit 12 undergoes a rotational or turning movement. 9. A device according to any one of claims 1 to 8, characterized in that it facilitates the pivot movement of a load transfer unit (12) mounted on the device in a plane different from the plane. 10. Apparatus according to any one of claims 1 to 9, characterized in that the preferably cylindrical disc-shaped member 30 comprises a cog wheel with cog teeth 32 formed on its periphery. 11. According to claim 10, the peripherally formed cog teeth 32 are interconnected to a screw worm 28, which is preferably driven by a motor 40 whose direction of rotation is reversible. Device. 12. Device according to claim 10, characterized in that the peripherally formed cogs 32 are interconnected to a rack which is preferably connected to a hydraulically or pneumatically actuated piston cylinder. 13 The device 14 comprises a first part having attachment means 19 to facilitate attachment to the support member 10 and a second part having attachment means 36 to facilitate attachment to the load transport unit 12. Claims 1 to 12
Apparatus according to any of paragraphs. 14. Claims characterized in that the first and second parts of the device 14 are arranged to pivot relative to each other in a plane different from the plane in which the load transfer unit 12 rotates or turns. Apparatus according to clause 13.