JPH078594Y2 - Work machine slide fixing device - Google Patents

Description

The present invention relates to a slide fixing device for a working machine connected to a working vehicle such as a tractor or a carrier.

[Conventional technology]

A work vehicle, for example, a tractor, is used by connecting various work machines to a rear portion or a front portion thereof. By the way, among the various work machines connected to the tractor, they are generally connected to the rear part of the tractor, such as a backhoe, auger, winch, trencher, workbench, etc., and are used with the tractor stopped when used. The working machine incorporates a slide mechanism for supporting the working part of the working machine slidably in the left-right direction with respect to the tractor. FIG. 9 shows an example in which a backhoe incorporating the slide mechanism is connected to a tractor. In the figure, (1) is a tractor, (2) and (3) are upper and lower hitches mounted on the rear part of the tractor (1), and (4) is the above upper hitch (2) and lower hitch (3). Is a backhoe connected to the rear of the tractor (1) by means of. The backhoe (4) includes a support portion (5) for supporting the backhoe (4) in a state of being connected to the tractor (1), and a support portion (5).
And a working part (6) supported by, and the working part (6) is formed by an arm part (7) and a bucket (7a) attached to the tip of the arm part (7). ing. This support part (5) is a support frame (8) fixed to the rear part of the tractor (1) by an upper hitch (2) and a lower hitch (3) mounted on the tractor (1), and a support frame (8). It has hook-shaped engaging portions (10a) (10a) that engage with two guide frames (9) (9) fixed to the rear end, and the engaging portions (10a) (10a)
By engaging the guide frame (9) (9) with the slide frame (10) supported so as to be slidable in the left-right direction of the tractor and the arm part (6), and sliding. It is composed of a swivel frame (11) which is swingably supported by the frame (10). Then, by sliding the slide frame (10) with respect to the guide frames (9) and (9), the entire working unit (6) is moved in the left-right direction with respect to the tractor (1), and the revolving frame (11). By rotating the slide frame (10) with respect to the working unit (6)
The whole can be turned. Further, the arm portion (7) forming the working portion (6) has one end having a revolving frame (11).
A first lift arm (12) pivotally attached to the first lift arm (12) and a second lift arm (13) pivotally attached to the first lift arm (12) at one end and a bucket (7a) to the other end. However, between the swing frame (11) and the first lift arm (12), between the first lift arm (12) and the second lift arm (13), and between the second lift arm (13) and the bucket (7), respectively. The hydraulic cylinders (14), (15) and (16) are incorporated, and the first and second hydraulic cylinders (14), (15) and (16) are expanded and contracted to expand and contract.
The angles of the lift arms (12) (13) and the bucket (7a) can be changed.

[Problems to be solved by the device]

Backhoe (4) connected to the rear of the tractor (1)
Incorporating the above-mentioned slide mechanism into the road makes it possible to direct the working unit (6) including the bucket (7a) and the arm (7) toward the roadside of the road, for example, when digging a groove in the roadside. Therefore, the workability of the above work can be improved. But the slide frame (10)
In order to smoothly slide the guide frame on the guide frames (9), (9), between the contact portions between the engaging portions (10a) (10a) of the slide frame (10) and the guide frames (9) (9). A margin of 2-5 mm is required. However, when the above-mentioned allowance is provided, when the work is performed by the bucket (7a) of the backhoe (4), the above-mentioned allowance supports the arm part (7) for supporting the bucket (7a) and the support part (5) for supporting the arm part (7). There is also a risk that the arm part (7) may slide in the left-right direction during the work, as well as play between them and the work.

For this reason, conventionally, in the one having the above-mentioned slide mechanism, as shown in FIG. 10, a desired portion of the slide frame engaging portions (10a), (10a) contacting with the guide frames (9), (9) is desired. The clamp device (17) (17) operated by the hydraulic mechanism is installed at the position of, and the slide frame (1
After sliding 0) on the guide frames (9) (9) by a predetermined amount, the clamp devices (17) (17) are operated,
Slide frame (10) to guide frame (9) (9)
I am trying to fix it on top. However, when the above method is adopted, the clamp device (17) is attached to the slide frame (10).
At the same time it becomes necessary to incorporate the (17), the tractor (1)
There is a problem that a hydraulic mechanism for operating the clamp devices (17) and (17) needs to be provided on the side or the backhoe (4) which is a working machine, and the structure of the entire device becomes very complicated. Further, when the above-mentioned support structure is adopted, all the load applied to the backhoe (4) must be supported by the tractor (1) side during the work by the backhoe (4), and the backhoe (4) serving as a working machine is always stabilized. There was also a problem that it was difficult to support the condition.

[Means for Solving the Problems]

The present invention has been proposed in order to solve the above-mentioned problems, and a first aspect of the present invention is to provide a support part connected to a rear part or a front part of a work vehicle, and a work part supported by the support part. In a working machine comprising a work part slidable with respect to the support part in the left-right direction of the work vehicle, the support part is a hitch provided at the rear or front part of the work vehicle. A pair of support plates, one end of which is pivotally attached, a support mast fixed to the other end of the support plate, and a lower mast composed of a guide frame bridged between the supports, an inner cylinder slidably penetrating the support columns, and A slide having an upper mast formed of a guide frame bridging between the upper ends of the inner cylinders, a pair of engaging portions slidably engaged with the guide frames of the upper and lower masts, and connecting to the working portion. Frame and Serial is pivotally attached to the hitch of the working vehicle,
One end of the swing arm is connected to a three-point link hitch mounted on the work vehicle through a connecting rod, and the other end is formed by a swing arm that engages with the support plate. By the movement, the lower end portion of the inner cylinder of the upper mast is brought into pressure contact with the ground to widen the space between both guide frames of the upper and lower masts.

The second invention is composed of a support portion connected to a rear portion or a front portion of the work vehicle, and a work portion supported by the support portion, and the work portion is in the left-right direction of the work vehicle with respect to the support portion. In a working machine configured to be slidable toward, a pair of support plates, one end of which is fixed to a rear portion or a front portion of a working vehicle, and the support portion are fixed to the other end of the support plate. A lower mast consisting of a pillar and a guide frame bridged between the lower ends of the pillar, and an upper part consisting of an inner cylinder slidably inserted in the pillar and a guide frame bridged between the upper ends of the inner cylinder protruding from the pillar. Outrigger cylinder that is integrally assembled with the mast and the inner cylinder of the upper mast, and the tip of the piston rod projects downward from the lower end of the column, and slidably engages with the guide frames of the upper and lower masts. A pair of engagement portions that, and,
It is configured by a slide frame connected to the working portion, and the distance between the guide frames of the upper and lower masts is widened by the pushing operation of the tip of the piston rod to the ground due to the extending operation of the outrigger cylinder. is there.

[Action]

As described above, by pressing the upper mast and the lower mast having the guide frame that engages with the pair of engaging portions of the slide frame in the expanding direction by the swing arm or the outrigger cylinder connected to the three-point link hitch, The two guide frames are brought into pressure contact with the engaging portion of the slide frame to fix the slide frame to the guide frame.

〔Example〕

1 and 2 show a main part of a backhoe having a slide fixing device according to the present invention connected to a rear part of a tractor. In the figure, (20) is a tractor, (21) is a lower hitch mounted on the rear of the tractor (20), and (22) is a normal three-point link hitch mounted on the rear of the tractor (20). is there. As shown in FIG. 3, the three-point link hitch (22) includes a pair of left and right lift arms (23) (23), lift rods (24) (24), lower links (25) (25) and a top link ( 26), the lift arms (23) (23) are integrally connected by a crank shaft (27), and the crank shaft (27)
Is connected to a single-acting hydraulic cylinder (not shown) mounted on the tractor (20). Then, by operating the hydraulic cylinders to rotate the lift arms (23) (23) upward, the lower links (25) (25) are fulcrumed (2
It is designed to rotate upward around 8). (2
9) is a backhoe connected to the rear part of the tractor (20) by the lower hitch (21) and the lower link (25). This backhoe (29) supports the backhoe (29) while being connected to the tractor (20) (3).
0) and the working part (31) supported by the supporting part (30)
And the working part (31) is provided with an arm part (31
a) and a bucket (not shown) serving as a working device attached to the tip of the arm portion (3a). The support portion (30) includes a support frame (32) pivotally mounted on the lower hitch (21), and a slide frame (33) slidably supported in the left-right direction by the support frame (32). And a swivel frame (34) rotatably supported by a slide frame (33). The support frame (32) has, at one end, a pin (21) of the lower hitch (21) as shown in FIGS. 4 and 5.
a) A pair of support plates (3) having notches (35a) that engage with (a)
5) (35), a support (36) (36) fixed to the other end of the support plates (35) (35) in the vertical direction, and this support (36)
The lower mast (38) consisting of a guide frame (37) bridged between the lower ends of (36), and the inner cylinders (39) (39) and the inner cylinder (which slidably pass through the columns (36) (36) respectively. 39) (39), the upper mast (41) consisting of a guide frame (40) bridged between the upper ends of the columns (36) (36), and the inner cylinder (3).
Installation plates (42) (42) are attached to the lower ends of the columns (36) (36) of the (9) (39). And
Guide frames (37) (40) for both masts (38) (41)
By engaging a pair of hook-shaped engaging portions (33a) (33a) of the slide frame (33) with the slide frame (33), the slide frame (33) is slidably supported in the left-right direction of the tractor (20). And both masts (38)
Distance (l) between the guide frames (39) and (40) of (41)
Is set to be 5 to 10 mm shorter than the inner dimension (m) between the engaging portions (33a) (33a) of the slide frame (33) in the minimum state. In addition, in Fig. 1 and Fig. 2 (4
3) is a swing arm rotatably supported by an end of the lower hitch (21) via a pin (43a). One end of this swing arm (43) has a connecting rod (44) and Pin (44a)
Connected to the lower link (25) via (44b),
The other end has an engaging pin (35b) protruding from the support plate (35).
It is formed so that it can come into contact with. Then, as shown in FIG. 1, when the lower link (25) is rotated upward with the end of the swing arm (43) in contact with the engagement pin (35b), the engagement pin (35b) is rotated. ) Is pressed downward,
The support plate (35) is pressed downward centering on the pin (21a) of the lower hitch (21), and the lower link (25) is once lowered so that the pin (44a) is lower than the pin (43a) by the tractor. When the lower link (25) is raised again after pulling with a wire or the like so as to come to the rear side, the connecting rod (44) comes into contact with the engagement pin (35b) as shown in FIG. (35
b) is lifted from below, and the support plate (35) rotates upward about the pin (21a) of the lower hitch (21). The above-described revolving frame (33) supported by the slide frame (33) supported by the above supporting structure, and the arm portion (31 connected to the revolving frame (33).
Since a) and the bucket (not shown) have the same structure as the conventional one, the description thereof will be omitted.

In the above structure, the backhoe (29) is connected to the rear part of the tractor (20) by fitting the support plate notch (35a) of the support frame (32) into the pin (21a) of the lower hitch (21). Then, as shown in FIG. 2, the connecting rod (44)
When the lower link (25) is rotated upward while the contact pin is in contact with the engagement pin (35b) of the support frame (32), the engagement pin (35b) is pushed up from below by the connecting rod (44). The support plate (35) of the support frame (32) rotates upward about the pin (21a). Then, since the ground plate (42) of the support frame upper mast (41) separates from the ground, the backhoe (29) can be movably supported by the tractor (20). Also, in this state, the guide frames (37) (4) of both masts (38) (41)
Since the interval (l) of 0) is minimized as shown in FIG. 4, the slide frame (33) is slidable with respect to the support frame (32), and the working part (31) of the backhoe (29) is moved. It is possible to slide the tractor (20) in the left-right direction.

Also, the back hoe (29) is moved to a predetermined position by the tractor (20) and the slide frame (33) is slid to position the back hoe (29) in the left-right direction of the tractor (20), and then the lower When the link (25) is rotated downward, the support plate (3) of the support frame (32) is
Since 5) also rotates downward about the pin (21a), the ground plate (42) of the upper mast part (40) of the support frame comes into contact with the ground, and the backhoe (29) is positioned. In this state, lower the lower link (25) to the lowest end once and pull the swing arm (43) or the connecting rod (44) with a wire or the like to move the pin (44a) forward of the pin (43a) from the tractor. Lower links after locating to the side (25)
Is raised again, the end of the swing arm (43) comes into contact with the engagement pin (35b) of the support frame (32), and the engagement pin (3
Press 5b) downward. For this reason, support frame (32)
The support plate (35) of (1) tends to rotate downward, and accordingly, the lower mast (38) integrated with the support plate (35) also tends to move downward. At this time, the upper mast (41)
Since the ground plate (42) is in contact with the ground and cannot move downward, as a result, as shown in FIG. 5, both masts (3
8) Since the space between the guide frames (37) and (40) of (41) is widened and the guide frames (37) and (40) are in pressure contact with the engaging portions (33a) and (33a) of the slide frame (33), The slide frame (33) is fixed on the support frame (32), and the backhoe (29) is positioned and fixed in the left-right direction. Further, since the ground plate (42) of the upper mast (41) is also pressed against the ground by the above operation, the support portion (30) of the backhoe (29) is positioned in a stable state with respect to the ground,
The backhoe (29) is held in place in a stable state.

Figure 6 shows the lower mast (38) and upper mast (4
It shows another embodiment for varying the interval between the guide frames (37) and (40) of 1). In the case of this embodiment, the outrigger cylinder (50) is integrally built in the inner cylinder (39) of the upper mast (41), and the piston rod (50a) of the outrigger cylinder (50) is attached to the lower mast (38). ) Protruding to the lower part of the support column (36), and attaching the ground plate (42) to the tip. Also, in the case of this embodiment,
The support plate (35) integrated with the column (36) of the lower mast (38) is not attached to the tractor (20) so as to be rotatable, but is fixed using a hitch or the like provided on the tractor (20). Be prepared to attach it to the state.

Then, when the back hoe (29) is moved by the tractor (20), the outrigger cylinder (50) may be shortened and the ground plate (42) of the upper mast (41) may be separated from the ground. Further, in this state, the space (l) between the guide frames (37) and (40) of both masts (38) and (41) is minimized, so that the slide frame (33) and the support frame (3
It becomes slidable with respect to 2), and the working part (31) of the backhoe (29) can be slid in the left-right direction of the tractor (20). Also, the tractor (20)
To move the backhoe (29) to the specified position,
In addition, after sliding the slide frame (33) and positioning the backhoe (29) in the left-right direction of the tractor, the outrigger cylinder (50) is extended and the ground plate (42) is pressed against the ground. Similar to the example, the space (l) between the guide frames (37) (40) of both masts (38) (41) is widened, and the guide frames (37) (40) engage the engaging portions ( 33a) and (33a) are pressed against each other, so the slide frame (33) is a support frame (32).
The backhoe (29) is fixed on the upper side and fixed in the left-right direction. Also, by the above operation, the upper mast (4
The ground plate (42) of 1) is also pressed against the ground, and the ground plate (42) functions as an outrigger, so that the support portion (30) of the backhoe (29) is positioned in a stable state with respect to the ground.
The backhoe (29) is held in place in a stable state.

In addition, although the above-mentioned embodiment shows an example in which the present invention is applied to a backhoe connected to a tractor, the present invention is connected to a working vehicle such as a tractor, and the support portion is fixed to the ground during use. It is needless to say that any other working machine can be applied to other than the above, and examples thereof will be described below. FIG. 7 shows a vehicle (6) having a crawler (60).
1) The upper mast (41) having the structure shown in FIG.
And a support frame (32) having a lower mast (38) are attached, and a work frame (64) is attached to a slide frame (33) slidably supported by the support frame (32) via arms (62) (63). ) Are connected. still,
In the case of this example, the support plate (35) integrated with the column (36) of the lower mast (38) is directly attached to the transport vehicle (61). The one shown in FIG. 8 utilizes a front three-point link hitch (71) mounted on the front surface of the truck (70), and has an upper mast (41) and a lower mast (38) having the structure shown in FIG. ) Supporting frame (32) with track (7
0), and a slide frame (33) slidably supported by the support frame (32) and a swivel frame (34) swivelly supported by the slide frame (33) for the working machine. The example which supports a working part is shown. In this example, the front three-point link hitch (71) and the support frame (32) are connected to each other by connecting the front three-point link hitch (71) to the support frame lower mast (38).
This is performed by connecting to a support plate (35) integrated with the support column (36).

[Effect of device]

As described above, according to the present invention, an upper trigger mast having a guide frame that engages with a pair of engaging portions of a slide frame and a lower mast are connected to a three-point link hitch as a swing arm or an outrigger cylinder that also acts as an outrigger. By pressing in the expanding direction by pressing both guide frames against the engaging part of the slide frame and fixing the slide frame to the guide frame so that the working machine is positioned and fixed in the left-right direction of the working vehicle. Is. That is, according to the present invention, it is not necessary to provide a dedicated clamp device that operates with a hydraulic mechanism for positioning and fixing the working machine in the left-right direction of the working vehicle, and as a drive source for positioning and fixing, it is usually used in the working vehicle. Since it is possible to use the equipped three-point link hitch or an outrigger cylinder that also functions as an outrigger, it is possible to simplify the structure of the entire device.

Further, according to the present invention, when the upper mast and the lower mast are moved in the expanding direction, the ground plate provided on the upper mast is pressed against the ground, so that all the loads applied to the working machine when working with the working machine It is possible to prevent the work machine from being applied, and it is possible to always support the work machine in a stable state.

[Brief description of drawings]

1 and 2 are side views showing a main part of a backhoe equipped with a slide fixing device according to the present invention connected to a rear part of a tractor, and FIG. 3 is a three-point link hitch equipped on the tractor. Is a perspective view, FIG. 4 and FIG.
FIG. 6 is a partial sectional view showing the engagement relationship between the lower and upper masts and the slide frame, FIG. 6 is a partial sectional view for explaining the second invention of the present invention, and FIG. 7 is a slide fixing device according to the present invention. FIG. 9 is a side view showing a state in which a supporting frame equipped with a vehicle is connected to a carrier, and FIG. 8 is a side view showing a state in which a supporting frame equipped with a slide fixing device according to the present invention is arranged in front of a truck, FIG. And FIG. 10 is a side view showing a state in which a backhoe equipped with a conventional slide fixing device is connected to a rear portion of a tractor. (20) ... tractor, (21) ... lower hitch, (22) ... three-point link hitch, (25) ... lower link, (29) ... backhoe, (30) ... supporting part, (31) ... working part, ( 31a) ... Arm part, (33) ... Slide frame, (33a) ... Engaging part, (35) ... Support plate, (36) ... Struts, (37) (40) ... Guide frame, (38) ... Lower mast , (39)… Inner cylinder,
(41) ... upper mast, (43) ... swing arm, (44) ... connecting rod, (50) ... outrigger cylinder, (50a) ...
Piston rod.

Claims (2)

[Scope of utility model registration request] 1. A work vehicle comprising a support portion connected to a rear portion or a front portion of the work vehicle, and a work portion supported by the support portion, wherein the work portion is directed in the left-right direction of the work vehicle with respect to the support portion. In a working machine configured to be slidable, a pair of support plates, one end of which is pivotally attached to a hitch provided at a rear portion or a front portion of a work vehicle, and the other end of the support plate are fixed to the support portion. A lower mast consisting of a pillar and a guide frame bridged between the pillars, an upper mast consisting of an inner cylinder slidably penetrating the pillar and a guide frame bridged between the upper ends of the inner cylinders, and the upper part And a slide frame that has a pair of engaging portions slidably engaged with the guide frame of the lower mast, and is connected to the working portion, and is pivotally attached to the hitch of the working vehicle, one end of which is the working vehicle. Equipped with And a swing arm that is engaged with the support plate at the other end, and the swing arm moves downward in the upper mast. Press the lower end of the cylinder against the ground,
A slide fixing device for a working machine, characterized in that a space between both upper and lower mast guide frames is widened. 2. A support part connected to a rear part or a front part of the work vehicle, and a work part supported by the support part, wherein the work part is oriented in the left-right direction of the work vehicle with respect to the support part. In a work machine configured to be slidable, a pair of support plates, one end of which is fixed to a rear portion or a front portion of a working vehicle, a support column fixed to the other end of the support plate, A lower mast composed of a guide frame bridged between the lower ends of the columns, and an upper mast composed of an inner cylinder slidably inserted in the columns and a guide frame bridged between the upper ends of the inner columns protruding from the columns. , Integrated with the inner cylinder of the upper mast, and the piston rod tip is slidably engaged with the guide frames of the upper and lower masts, and the outrigger cylinder protruding downward from the lower end of the column. Both of the upper and lower mast guides are constituted by a slide frame having a pair of engaging portions and connected to the working portion, and by pushing the tip of the piston rod to the ground by the extension operation of the outrigger cylinder. A slide fixing device for a working machine, characterized in that a space between frames is widened.