JP3605753B2 - Quick coupler device for work machines - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a quick coupler device for a work machine, and more particularly, to a quick coupler device for detachably and quickly connecting a work device to a work machine.
[0002]
[Prior art]
For example, a work machine such as a hydraulic shovel can perform various works by replacing a work device attached to the work arm with a different work device. Work such as excavation and loading of earth and sand is performed by installing a bucket, work such as quarrying and road surface crushing is performed by installing a hydraulic breaker, and dismantling of structures by installing a crusher. The work is performed. Therefore, if various working devices such as buckets, breakers, crushers and the like are appropriately attached and detached and replaced, one hydraulic excavator can be used for multiple purposes and multiple functions.
[0003]
One example of mounting the working device will be described with reference to FIG. 6. The working device 50 is used to swing the working device 50 around the shaft 53 via the shaft 53 at the tip of the working arm 52. The swinging movement member 54 is rotatably mounted via a shaft 55. This method requires the attachment and detachment of the shaft 53 and the shaft 55 for attachment and detachment of the working device 50, and thus is adopted when the frequency of attachment and detachment is relatively low.
[0004]
If the work equipment is frequently attached and detached, the work equipment is attached to the work machine via a quick coupler device (hereinafter sometimes simply referred to as a quick coupler) so that attachment and detachment can be performed freely and quickly. Is done.
[0005]
A typical example of the quick coupler will be described with reference to FIG. 7. The working arm 52 and the swinging motion member 54 of the working machine and the working device 56 in which the form of the connecting portion of the working device 50 is a quick coupler are described. A quick coupler, generally designated by reference numeral 58, is interposed therebetween. The quick coupler 58 includes a bracket 60 attached to the working arm 52 and the swinging movement member 54 by the shaft 53 and the shaft 55 in the same manner as the mounting of the working device 50 and provided with the fixed hook 60a and the movable hook 60b, and the hooks 60a and 60b. And a pair of engaging shafts 56a and 56b provided on the working device 56 so as to be releasably engaged with the working device 56. The fixed hook 60a and the movable hook 60b are disposed with their opening portions facing in opposite directions, and the movable hook 60b is connected to an extendable swinging means 62.
[0006]
In order to connect the working device 56 to the working arm 52 and the swinging movement member 54 via the quick coupler 58, that is, to connect the bracket 60 and the working device 56, first, the swinging means 62 is contracted and the movable hook 60b is fixed to the fixed hook. 60a, the distance between the movable hook 60b and the fixed hook 60a (shown by a two-dot chain line) is reduced, and one engaging shaft 56a of the working device 56 is engaged with the fixed hook 60a. And the movable hook 60b is moved in a direction away from the fixed hook 60a to engage the movable hook 60b with the other engagement shaft 56b (the state shown by the solid line).
[0007]
In order to release the connection, the movable hook 60b is swung toward the fixed hook 60a by the swinging means 62 (indicated by a two-dot chain line) in the reverse of the above-described connection procedure. 56b, the engagement between the fixed hook 60a and the engagement shaft 56a is released. Thus, the working device 56 is detachably and quickly connected to the working arm 52 and the swinging member 54 of the working machine via the quick coupler 58. If various working devices are provided with the pair of engagement shafts 56a and 56b as described above, any working device can be easily attached to and detached from the working machine.
[0008]
[Problems to be solved by the invention]
However, the conventional quick coupler of the above-described embodiment has the following problems to be solved.
[0009]
(1) Work device compatibility:
Since the structure of the quick coupler may be any as long as the work machine and the work device can be quickly and removably connected to the work machine for that purpose, there are various types of structures other than the above-described structure using the hook and the engagement shaft. Various structures have been devised and put into practical use. Therefore, the working device connected by the quick coupler needs to be provided with a dedicated structure corresponding to the structure of the quick coupler, for example, the pair of engagement shafts 60a and 60b described above. The device cannot be used. That is, the working devices are not compatible and inconvenient.
[0010]
(2) Installation of work equipment and presence or absence of quick coupler:
The working device 50 (FIG. 6) directly mounted by the shafts 53 and 55 as described above without using the quick coupler in the working machine has a different structure of the connecting portion when the quick coupler is used (FIG. 7). I can not use it.
[0011]
(3) Preparation and utilization of working equipment:
Therefore, when a quick coupler is used, it is necessary to prepare a special working device in accordance with the quick coupler, and it is not possible to connect the working device when the quick coupler is not used. Machine users must provide a number of working equipment dedicated to each. This means that you cannot use your assets effectively.
[0012]
The present invention has been made in view of the above facts, and a technical problem of the present invention is to provide a working device having various connection structures, which is directly mounted on a working machine via a quick coupler or without a quick coupler. Another object of the present invention is to provide a working machine quick coupler device that can be freely and quickly attached to and detached from a working machine without modification.
[0013]
[Means for Solving the Problems]
In the present invention, as a quick coupler device that solves the above technical problem, a quick coupler device includes a bracket connected to a working machine, an adapter connected to the working device, and a connecting unit that detachably connects the bracket and the adapter. The bracket and the adapter are connected to each other via a planar contact surface that abuts each other, and the connecting means includes a pair of hook members provided on the bracket and capable of expanding and contracting each other, and the hook member. A telescopic engagement means connected between them, and an opening formed in the abutment surface of the adapter, and a pair of hook members are formed by expanding and contracting the engagement means to form an edge of the opening. detachably engaged with and detachably connected to the working device in the working machine, the quick connector apparatus for a working machine, wherein are provided that.
[0014]
A quick coupler device according to the present invention includes a bracket connected to a work machine, and an adapter detachably connected to the bracket and connected to the work device. By attaching the adapter in advance to various working devices having different connecting portion structures, the bracket and the adapter can be detachably engaged, and the working device can be freely attached to and detached from the working machine.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a quick coupler device of a work machine configured according to the present invention will be described in more detail with reference to the accompanying drawings.
[0020]
Referring to FIGS. 1 and 2, a quick coupler, generally designated by the reference numeral 2, is connected to a bracket 4 connected to a working arm 52 and a swinging motion member 54 of a working machine, and to a bucket 6 as a working device. And a connecting means 10 for removably connecting the bracket 4 and the adapter 8 to each other. The work arm 52 and the bracket 4 are rotatably connected by a shaft 53, and the swinging motion member 54 and the bracket 4 are rotatably connected by a shaft 55. The swinging movement member 54 swings the bucket 6 connected by the quick coupler 2 around the shaft 53 of the working arm 52. The adapter 8 and the bucket 6 are connected by the same shafts 53 and 55 that connect the work arm 52 and the swinging movement member 54 to the bracket 4.
[0021]
The bracket 4 will be described with reference to FIGS. 3 and 4. The bracket 4 is formed integrally by welding various steel members to each other, and a substrate 4a formed by cutting a thick plate into a rectangular shape; A pair of support plates 4b, 4b erected at a predetermined interval on one surface of 4a (upper surface in FIGS. 3 and 4), and reinforcement having a mountain-shaped cross section connecting between the support plates 4b, 4b. And a plate 4c. The other surface of the substrate 4a (the lower surface in FIGS. 3 and 4) forms a planar contact surface T1 that contacts the adapter 8.
[0022]
Each of the support plates 4b, 4b has a pair of cylindrical bearing members 4d, 4d, which are connecting portions for connecting to the working arm 52, and a pair of connecting portions, which is for connecting to the swinging motion member 54. Cylindrical bearing members 4e, 4e are provided. The spacing between the bearing members 4d, 4d and the bearing members 4e, 4e is defined by the dimension W, and the working arm 52 and the swinging motion member 54 are positioned at the dimension W. The bearing members 4d and 4d have a bearing hole 5a on the same axis, and the bearing members 4e and 4e have a bearing hole 5b on the same axis so that the respective axes are substantially parallel to each other. It is formed as prescribed in. The pair of hook members 12, 12 constituting the connecting means 10 (the connecting means 10 will be described in detail later) can be protruded from the above-mentioned one surface side to the contact surface T1 side of the substrate 4a and can be freely moved. The thus formed rectangular opening 4f is formed. Further, a band-shaped guide member 4g for slidably guiding the pair of hook members 12, 12 between the above-described one surface of the substrate 4a and each of the opposed side surfaces of the pair of support plates 4b, 4b. , 4 g.
[0023]
3 and 4, the adapter 8 is also integrally formed by welding various steel members to each other, and a board 8a formed by cutting a thick plate into a rectangular shape, and a board 8a. A pair of support plates 8b, 8b erected at predetermined intervals on one surface (the lower surface in FIGS. 3 and 4), and a pair of cylinders having both ends joined to the support plates 8b, 8b, respectively. Bearing members 8c, 8c. The axial length of the cylindrical bearing member 8c is such that it can be positioned in a pair of bearing members 6b, 6b and 6c, 6c having a dimension W of the bucket 6 (the bucket 6 will be described in detail later). Stipulated. The other surface of the substrate 8a (the upper surface in FIGS. 3 and 4) forms a planar contact surface T2 that contacts the substrate 4a of the bracket 4.
[0024]
The bearing members 8c and 8c have bearing holes 9a and 9b, respectively, whose axes are substantially parallel to each other, and whose interval is defined to be the same dimension L as the interval between the bearing hole 5a and the bearing hole 5b of the bracket 4 described above. Is formed. The board 8a is formed with a rectangular opening 16 in which a pair of hook members 12, 12 constituting the connecting means 10 are removably engaged, and the edge engaged with the hook member 12 is formed from the contact surface T2 to the back surface. An inclined engagement surface in which the opening 16 is enlarged toward is formed.
[0025]
The bucket 6 as a working device will be described with reference to FIG. 5 and mainly FIG. 5 together with FIGS. 3 and 4. A pair of support plates 6 a, 6 a erected at predetermined intervals are provided on the upper part of the bucket 6. Each of the support plates 6a, 6a is provided with a pair of cylindrical bearing members 6b, 6b and 6c, 6c which are connecting portions for connecting to the adapter 8. The spacing between the bearing members 6b, 6b and the bearing members 6c, 6c is substantially the same as the dimension W of the bracket 4, and the bearing members 6b, 6b have a bearing hole 7a on the same axis. In 6c, 6c, a bearing hole 7b is formed on the same axis so that the respective axes are substantially parallel to each other and the interval is defined as a dimension L.
[0026]
The connecting portion between the bucket 6 and the adapter 8 is formed substantially the same as the connecting portion between the working arm 52 and the swinging motion member 54 and the bracket 4 described above. The bucket 6 and the adapter 8 are connected to the working arm 52 and the swinging motion. It is connected by the same shafts 53 and 54 that connect the moving member 54 and the bracket 4. That is, the connecting portion between the working arm 52 and the swinging member 54 and the bracket 4 and the connecting portion between the adapter 8 and the bucket 6 are formed substantially the same. It is formed so that it can be directly connected without the intervention of the bracket 4 and the adapter 8.
[0027]
The connecting means 10 will be described with reference to FIGS. 3 and 4. The connecting means 10 includes a pair of hook members 12 disposed between the base plate 4a of the bracket 4, the support plates 4b and 4b, and the guide members 4g and 4g. , 12, a telescopic engagement means 14 interposed between the hook members 12, 12, and the above-described opening 16 formed in the contact surface T <b> 2 of the substrate 8 a of the adapter 8.
[0028]
The engaging means 14 includes a fluid pressure cylinder 15, and the expansion and contraction operation of the fluid pressure cylinder 15 is controlled by supplying a working fluid from a fluid control means of the work machine body via a pipe (the pipe is not shown). ).
[0029]
The hook member 12 is integrally formed of a steel member, and has a flat sliding portion 12a slidably disposed between the substrate 4a of the bracket 4 and the guide member 4g, and a lower surface of the sliding portion 12a. A hook portion 12b which is attached to form a hook having a V-shaped cross section and which protrudes into the opening 4f and the opening portion 16 is provided on the side of the sliding portion 12a opposite to the side on which the hook portion 12b is attached. The end of the fluid pressure cylinder 15 of the means 10 is provided with a bracket portion 12c which is rotatably attached by a pin member. The pair of hook members 12, 12 are disposed with their V-shaped hook openings facing each other. Between the pair of hook members 12, 12, a stopper 13 that regulates an interval when the pair of hook members 12, 12 slides and approaches is attached to the substrate 4a.
[0030]
By supplying the working fluid to the rod side and extending the hydraulic cylinder 15 of the connecting means 10, the interval between the hook members 12 and 12 is increased, and the working fluid is supplied to the head side and contracted to supply the working fluid to the head side. , 12 are reduced.
[0031]
The connection of the bucket 6 as a working device to the working machine by the quick coupler device 2 configured as described above will be described mainly with reference to FIGS. As described above, the bracket 4 is connected to the working arm 52 and the swinging movement member 54 by the shafts 53 and 55, and the adapter 8 is connected to the bucket 6 by the shafts 53 and 55, respectively. To connect the bracket 4 and the adapter 8, first, the fluid pressure cylinder 15 of the engagement means 10 is contracted by supplying fluid from the fluid control means to its rod side, and the pair of hook members 12, Close to each other until they come into contact with each other (state indicated by a two-dot chain line). Then, the work arm 52 and the swinging movement member 54 are moved to move the bracket 4 appropriately to insert the pair of hook members 12, 12 into the opening 16 of the adapter 8, and to make contact between the contact surface T 1 of the bracket 4 and the adapter 8. The contact surface T2 is brought into contact. The fluid pressure cylinder 15 is extended by supplying fluid to its head side, and the pair of hook members 12, 12 is engaged with the edge of the opening 16 of the adapter 8 (the state shown by the solid line). Thus, the bracket 4 and the adapter 8 are connected, and the bucket 6 as a working device is connected to the working machine via the quick coupler 2.
[0032]
In order to release the connection, contrary to the connection procedure, first, the hydraulic cylinder 15 is contracted, the intervals between the hook members 12, 12 are brought closer to each other (the state shown by a two-dot chain line), and the hook members 12, 12 are connected to each other. The engagement of the adapter 8 with the edge of the opening 16 is released, and the connection between the bracket 4 and the adapter 8 is released.
[0033]
The operation of the quick coupler device 2 of the working machine as described above will be described with reference to FIGS.
[0034]
In the quick coupler device 2, if the connecting portion of the adapter with the working device is formed according to the difference between the working devices, and the adapter is connected to each working device in advance, any working device can be connected via the quick coupler device 2. Can be detachably connected to the working machine. That is, any of various working devices having different connecting portions can be connected to the working machine with compatibility by the quick coupler 2. Further, if the connecting portion between the adapter and the working device is the same as the connecting portion between the working machine and the bracket as in the above-described embodiment, the same working device can be used regardless of whether the quick coupler 2 is equipped. Can be connected. Therefore, it is not necessary to prepare many types of working devices, and the assets on hand can be effectively used.
[0035]
In the quick coupler device 2, since the bracket 4 and the adapter 8 are connected by the pair of hooks 12, 12 with the flat contact surfaces T1 and T2 contacting each other, the conventional connection between the hook and the engagement shaft ( For example, the connection can be strengthened as compared with the configuration shown in FIG.
[0036]
As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be variously modified or modified within the scope of the present invention.
[0039]
【The invention's effect】
According to the quick coupler device for a working machine configured according to the present invention, a working device having various coupling structures, which is directly mounted on the working machine via a quick coupler or without a quick coupler, is modified. A quick coupler device for a working machine is provided which can be freely and quickly attached to and detached from the working machine without any problem.
[Brief description of the drawings]
FIG. 1 is a side view showing a form in which a bucket as a working device is connected to a working machine by a quick coupler device of the working machine configured according to the present invention.
FIG. 2 is a front view as seen in the direction of arrows AA in FIG. 1;
FIG. 3 is an enlarged cross-sectional view as viewed in the direction of arrows BB in FIG. 2;
FIG. 4 is a cross-sectional view as seen in the direction of arrows CC in FIG. 3;
FIG. 5 is a perspective view of a bucket as a working device.
FIG. 6 is a side view showing an embodiment in which a bucket is connected to a work machine without using a quick coupler device.
FIG. 7 is a side view showing an embodiment in which a bucket is connected to a work machine by a conventional quick coupler device.
[Explanation of symbols]
2: Quick coupler device 4: Bracket 6: Bucket (working device)
8: Adapter 10: Connecting means 12: Hook member 14: Engaging means 15: Fluid pressure cylinder 16: Opening 50: Working device 52: Working arm (Work machine)
54: Swinging motion member (work machine)
56: Working device 58: Quick coupler device T1: Contact surface T2: Contact surface

Claims (1)

A bracket connected to the working machine, an adapter connected to the working device, and a connecting means for detachably connecting the bracket and the adapter ,
The bracket and the adapter are connected via an abutting surface formed in a planar shape that abuts each other,
The connecting means is
A pair of hook members provided on the bracket, the distance between the hook members being expandable and contractable, and elastic engagement means connected between the hook members;
An opening formed in the contact surface of the adapter,
A pair of hook members are detachably engaged with the edge of the opening by expanding and contracting the engagement means,
To detachably connected to the working device in the working machine, the quick coupler device for a working machine, characterized in that.

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