NL9500062A - Device for rotatably attaching a tool to a carrier - Google Patents

Device for rotatably attaching a tool to a carrier Download PDF

Info

Publication number
NL9500062A
NL9500062A NL9500062A NL9500062A NL9500062A NL 9500062 A NL9500062 A NL 9500062A NL 9500062 A NL9500062 A NL 9500062A NL 9500062 A NL9500062 A NL 9500062A NL 9500062 A NL9500062 A NL 9500062A
Authority
NL
Netherlands
Prior art keywords
spindle
ring
tool
carrier
sleeve
Prior art date
Application number
NL9500062A
Other languages
Dutch (nl)
Inventor
Dirk De Haan
Original Assignee
Haan Nederland Beheer B V De
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haan Nederland Beheer B V De filed Critical Haan Nederland Beheer B V De
Priority to NL9500062 priority Critical
Priority to NL9500062A priority patent/NL9500062A/en
Publication of NL9500062A publication Critical patent/NL9500062A/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36Component parts
    • E02F3/3604Devices to connect tools to arms, booms or the like
    • E02F3/3677Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681Rotators
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/965Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of metal-cutting or concrete-crushing implements

Abstract

The device comprises: a spindle which is attached to the carrier or the tool; a sleeve which is attached to the tool or the carrier and at least partially surrounds the spindle; at least one bearing which is arranged between the spindle and the sleeve, at least one of the bearings being designed to absorb axial forces and a removable ring, which is arranged in contact with the bearing which is suitable for absorbing axial forces, and is at least partially recessed into the spindle, being designed to guide axial forces from the bearing to the spindle. As a result of these measures, it is no longer possible for the element which absorbs the forces to break, since it is completely enclosed. According to a preferred embodiment, the ring is divided into at least two segments, and preferably into four equal segments. The safety is increased further by arranging a retaining ring around the ring.

Description

Apparatus for rotatably attaching a tool to a carrier

The invention relates to a device for rotatably attaching a tool to a carrier, comprising: a spindle attached to the carrier or the tool; a sleeve at least partially encircling the spindle attached to the tool or carrier; at least one bearing arranged between the spindle and the sleeve, at least one of the bearings being adapted to take up axial forces.

Such a device is generally known.

Such devices are used, for example, in the rotatable attachment of tools such as, for example, buckets or grippers, for example on the arm of a machine, for example an excavator. Such a device must be adapted to absorb the particularly great forces that can occur between the tool and the carrier, in many cases the arm. These forces are formed not only by the weight of the tool, but also by the forces caused by the tool, for example, when the tool grips and lifts objects or is otherwise loaded.

However, the invention is not limited to the above-mentioned examples; it is equally applicable to other tools.

In such prior art devices, an inner sleeve is closed, which is closed on its underside by a plate, adjacent to the bearing suitable for absorbing axial forces. This plate is fixed in the spindle by means of a bolt. In this construction, the entire force exerted by the tool in the axial direction of the device is transmitted by means of the bolt. This bolt thus forms a very heavily loaded element. If the bolt breaks, the tool will come off the carrier, which can lead to particularly dangerous situations.

According to another known device, the plate is fixed in the spindle by means of a number of bolts. This distributes the force development over a larger number of elements, reducing the risk of breakage and the associated dangers. However, this prior art has the drawback that safety control with such a construction is only possible to a very limited extent; the bolts should be changed regularly to work safely. It is of course very doubtful whether this would take place in a realistic situation.

The object of the present invention is to provide such an apparatus which is inherently safe.

This object is achieved by a removable ring arranged at least partially in the spindle, which is arranged in contact with the axial-force-adapted bearing, and which is adapted for guiding axial forces from the layer to the spindle.

As a result of these measures, it is no longer possible for the force-absorbing element to break because it is completely enclosed.

According to a preferred embodiment, the ring is divided into at least two segments, and preferably into four equal segments.

The provision of a retaining ring around the ring further increases safety, which is in particular the case when the gap between the outside of the retaining ring and the inside of the sleeve is smaller than the depth with which the ring is in the spindle. is let in.

Such a device is moreover preferably provided with means for conducting hydraulic energy from the carrier to the tool.

According to another preferred embodiment, this energy is used to drive a hydraulic driving member for rotating the tool in rotation relative to the carrier. However, the invention is also applicable without the hydraulic motor; without motor, the tool is freely rotatable relative to the arm.

The present invention will be elucidated hereinbelow with reference to the annexed drawings, in which: figure 1 shows a perspective view of a combination of a machine and a tool coupled to a device according to the invention; figure 2: a schematic cross-sectional view of the device according to the invention; and figure 3 is a partly broken away perspective detail view of a device according to the invention.

In figure 1 a self-propelled machine 1 is shown which is provided with an arm 2, to which a tool 3 in the form of a gripper is attached. The arm 2 is rotatably mounted with respect to the machine 1, while the arm itself is provided with a kink point 4. At its end, the arm 2 is provided with a flange 5 which is articulated with respect to the last member 6 of the arm 2, for which purpose it can be driven by means of a hydraulic cylinder 6.

The device according to the invention, which is indicated by the number 8, is arranged on the underside of the flange 5. The frame 9 of the gripper 3 is fixed to the underside of this device, the frame 9 being rotatable in the axial sense relative to the flange 5. The frame 9 furthermore attaches the jaws 10, 11 of the gripper 3, which are movable by means of a hydraulic cylinder 12.

Figure 2 shows the construction of the device according to the invention 6 in more detail.

The device according to the invention is formed by a spindle 13 which is integral with a flange 14, which flange 14 is connected to the flange 5 of the an 2 by means of bolts 15. A bush 16 is arranged around the spindle 13, which is connected to a ring 17 which is connected to the frame 9 of the tool by bolts 18.

Between the sleeve and the spindle, a first conical bearing 19 is arranged so that it absorbs the forces transmitted by the tool in upward direction to the arm, while a second conical bearing 20 is arranged which is arranged for absorbing the oppositely directed forces.

The outer ring of the tapered bearing 19 is recessed in the sleeve 16, while the inner ring of the tapered bearing 19 rests on its upper side against a breast of the plate 14. The outer ring of the conically placed conical bearing 20 rests on its upper side against a chest arranged on the inside of the sleeve 16, while the inner ring of said bearing rests against an intermediate ring 24. Below the intermediate ring 24 a recess 25 is arranged in the wall of the spindle 13, in which a ring 26 is mounted. The ring 26 is surrounded by a retaining ring 27. The retaining ring 27 is provided with an inwardly extending edge 28, which rests against the spindle 13, for fixation on its underside. A circlip 29 is provided for fixing the retaining ring 27.

Hydraulic feedthroughs are provided in the device for driving hydraulic equipment which is incorporated in the tool, for example the hydraulic cylinder 12. These are essentially formed in channels 30,31 arranged in the spindle which are connected to grooves 32 and 33 respectively arranged at different heights in the cylinder jacket wall of the spindle and which communicate with corresponding hydraulic channels 34 arranged in the sleeve. 35. This, incidentally, is prior art.

For driving the tool in rotation, the sleeve 16 is closed at its underside by a plate 36 on which a hydraulic motor 37 is mounted. The hydraulic motor is provided with an output shaft on which is mounted a gear 38 which engages an internal toothing 39 which is arranged in the inner side of a cavity in the spindle 13. Hydraulic energy is supplied to the hydraulic motor by means of a central hydraulic channel 39 .

However, it is possible to omit the hydraulic motor; the tool is then freely rotatable.

This construction is further shown in detail in figure 3.

Figure 2 further shows how the ring 26, in which the essence of the invention lies, consists of four segments 26a, 26b, 26c and 26d. After this ring has been arranged in the recess 25 of the spindle 13, the retaining ring 27 is arranged around the ring 26, so that the ring 26 is enclosed in the recess 25. The axial downwardly directed axial bearing 20 forces are then transmitted via the intermediate ring 24 to the ring 25, which transfers it to the recess. If the ring breaks, this will not lead to the tool coming loose from the arm; instead, it will most likely prevent the tool from turning, so that the operator is alerted to the break. Safety is further enhanced by the measure that the retaining ring 27 is enclosed by the sleeve 16. Expressed in dimensions, the gap between the outside of the retaining ring and the inside of the sleeve is smaller than the depth with which the ring in the spindle is inserted.

It will be clear that further modifications can be made to said device without departing from the invention.

Claims (10)

1. Device for rotatably attaching a tool to a carrier, comprising: - a spindle attached to the carrier or the tool; - a sleeve, at least partially surrounded by the spindle, attached to the tool or the carrier; - at least one bearing arranged between the spindle and the sleeve, at least one of the bearings being adapted to absorb axial forces, characterized by a removable bearing arranged in contact with the bearing suitable for absorbing axial forces, at least partly in the spindle recessed ring adapted to guide axial forces from the bearing to the spindle.
Device according to claim 1, characterized in that the ring is divided into at least two segments.
Device according to claim 2, characterized in that the ring is divided into four equal segments.
Device according to claim 2 or 3, characterized in that a retaining ring is arranged around the ring.
Device as claimed in claim 4, characterized in that the retaining ring is provided with an inwardly extending rim.
Device according to claim 4 or 5, characterized in that the gap between the outside of the retaining ring and the inside of the sleeve is smaller than the depth with which the ring is inserted into the spindle.
Device according to one of the preceding claims, characterized in that the device is provided with means for conducting hydraulic energy from the carrier to the tool.
8. Device as claimed in claim 7, characterized in that the sleeve is closed at its underside by a plate, and that a hydraulic driving member is arranged against the plate for driving the tool in rotation relative to the carrier.
Device according to claim 8, characterized in that the drive member is formed by a hydraulic motor, the housing of which is connected to the plate and the shaft to which is connected to the spindle.
10. Device as claimed in claim 9, characterized in that the shaft is provided with a gear wheel which engages an internal toothing which is arranged on a cavity arranged in the spindle.
NL9500062A 1995-01-12 1995-01-12 Device for rotatably attaching a tool to a carrier NL9500062A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL9500062 1995-01-12
NL9500062A NL9500062A (en) 1995-01-12 1995-01-12 Device for rotatably attaching a tool to a carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL9500062A NL9500062A (en) 1995-01-12 1995-01-12 Device for rotatably attaching a tool to a carrier

Publications (1)

Publication Number Publication Date
NL9500062A true NL9500062A (en) 1996-08-01

Family

ID=19865449

Family Applications (1)

Application Number Title Priority Date Filing Date
NL9500062A NL9500062A (en) 1995-01-12 1995-01-12 Device for rotatably attaching a tool to a carrier

Country Status (1)

Country Link
NL (1) NL9500062A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243755A (en) * 2013-05-11 2013-08-14 山西东华机械有限公司 Bearing and gear ring integrated rotary table for bottom ripping machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2838346A1 (en) * 1978-09-02 1980-03-20 Thumm Fa Heinz TURNING DEVICE FOR AN EXCAVATOR GRIPPER OR THE LIKE
US4288172A (en) * 1978-03-24 1981-09-08 Caterpillar Tractor Co. Keeper assembly
WO1982001022A1 (en) * 1980-09-15 1982-04-01 R Mannbro Arrangement for excavator buckets

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4288172A (en) * 1978-03-24 1981-09-08 Caterpillar Tractor Co. Keeper assembly
DE2838346A1 (en) * 1978-09-02 1980-03-20 Thumm Fa Heinz TURNING DEVICE FOR AN EXCAVATOR GRIPPER OR THE LIKE
WO1982001022A1 (en) * 1980-09-15 1982-04-01 R Mannbro Arrangement for excavator buckets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243755A (en) * 2013-05-11 2013-08-14 山西东华机械有限公司 Bearing and gear ring integrated rotary table for bottom ripping machine
CN103243755B (en) * 2013-05-11 2016-02-03 山西东华机械有限公司 Dintheader bearing adds gear ring type turntable

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BV The patent application has lapsed