JP2759717B2 - Working device with tilt mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working device provided with a tilt mechanism mounted on an earthmoving vehicle.

[0002]

2. Description of the Related Art An example of a working device equipped with a conventional tilting mechanism, which is mounted on an earthmoving vehicle and used, is disclosed, for example, in Japanese Patent Application Laid-Open No. 1-189035 (first conventional example). be able to. The work apparatus disclosed in the publication includes a single blade that is pivotally mounted on a vertical axis and a front-rear axis at a front end position of the blade support body. The blade is also configured to be able to move laterally. In order to cause the blade to perform the above-described operation, the working device includes a pair of angle cylinders, tilt cylinders, and slide cylinders. The support body is
It is connected to a tilt link and a pair of lift arms.

Another example of a conventional working device having a tilt mechanism is disclosed in Japanese Patent Application Laid-Open No. 2-136150 (second conventional example). The working device disclosed in the publication includes a protruding piece swingably provided on a front portion of a frame which is a blade supporting body, and a pair of right and left supported on the protruding piece so as to be swingable about a vertical axis. From a pair of angle cylinders provided between a pair of left and right blades and a frame (a bracket provided on a horizontal member of the frame), and a tilt cylinder provided between one blade and the frame. It is configured. The rear end of the frame is swingably connected to the vehicle body, and a tilt link is provided between the vehicle body and the cross member of the frame.

[0004]

The working device having the above-mentioned conventional tilt mechanism has the following problems to be solved. (1) In the first conventional example, the tilt cylinder is located at the rear upper position of the blade and at the front end position of the blade support main body.
In the conventional example, the blade is disposed above the rear side of the blade and at the front end of the blade supporting body (frame). That is, in the related art, a tilt mechanism (a mechanism including a tilt cylinder and a mechanism accompanying the tilt cylinder, for example, a bracket for mounting the tilt cylinder or a mechanism for turning the blade around the longitudinal axis of the blade) is provided in front of the blade support body. Is provided. As a result, for example, in a working device without a tilt function,
In order to achieve multifunctionality by changing the specifications to have a tilt function, the existing configuration provided in front of the blade support body must be significantly changed. For this reason, the configuration with and without the tilt function is specified respectively, and when the specifications are changed, there is no compatibility at all, and there are significant problems in design, manufacturing, and cost. Practical application becomes extremely difficult. (2) As described above, since the tilt mechanism is arranged at a position near the front end of the working device, the amount of overhang in the forward direction is relatively large, and the weight of the front end is increased. The quality is significantly impaired. (3) When the blade has various functions as in the first conventional example, a tilt mechanism is further added in front of the blade supporting body where each mechanism is concentrated. The structure becomes more complicated, making design, assembly and maintenance extremely difficult. (4) The tilt cylinder, which is a component of the tilt mechanism,
Since the blade is disposed above the rear portion of the blade, depending on the operating position of the blade, visibility from the driver's seat of the vehicle may be impaired, and workability and safety may be impaired.

Accordingly, a main object of the present invention is to provide a work with an improved tilt mechanism which can be put into practical use very easily and at low cost without changing the existing structure provided in front of the blade support body. It is to provide a device.

Other objects of the present invention will become apparent from the following description of embodiments of a working device having a tilt mechanism constructed according to the present invention, which will be described in detail with reference to the accompanying drawings.

[0007]

According to the present invention, there is provided a main body support mounted on an earthwork vehicle main body, and a blade-side support mounted in front of the main body support. , and a blade mounted in front of the blade-side supports, the tilt mechanism is provided between the main body side support and the blade-side supports, 該Chi
The tilt mechanism connects the blade side support to the main body side support.
To be pivotable about the longitudinal axis.
Between the support and the main body side support.
Side support with respect to the body side support and the longitudinal axis
To provide a tilt cylinder for turning around
Is more configurations, working devices provided with a tilt mechanism, characterized in that, is provided.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a working device having a tilt mechanism according to the present invention; Referring to FIG. 1, a working device provided with a tilt mechanism indicated by reference numeral 2 as a whole includes a main body side support 6 attached to an earthmoving vehicle main body 4 side indicated by a two-dot chain line.
And a blade support 8, which is a blade support body mounted in front of the main body support 6, and a blade 10 mounted in front of the blade support 8.
In this example, the blade 10 includes a pair of blades pivotally connected to the center of the front end of the blade-side support 8. Each of a pair of blades and a blade-side support 8
An angle cylinder is provided between the two. An auxiliary blade is provided at an upper edge of each of the pair of blades. Each of the auxiliary blades and the blade-side support 8
A mechanism is provided for positioning the auxiliary blade between the working position and the non-working position. A sled is provided behind each of the pair of blades. In the present invention, any of these configurations provided in front of the blade-side support 8 can be realized and is not intended for the configuration itself.
The description is omitted. The configuration similar to the above is disclosed in Japanese Patent Publication No. Sho 61-28051.

Referring to FIGS. 2 to 5, a tilt mechanism 1 is provided between the main body side support 6 and the blade side support 8.
2 are provided. The tilt mechanism 12 mounts the blade-side support 8 on the main-body-side support 6 so as to be pivotable about the longitudinal axis C, and places the blade-side support 8 between the main-body-side support 6 and the blade-side support 8. It is configured by providing a tilt cylinder 14 for turning around the axis C in the front-rear direction with respect to the side support 6. The front-rear direction is the earthwork vehicle body 4 when viewed in plan.
Means a direction substantially coincident with the traveling direction. The tilt mechanism 12 is provided on both sides of the front surface of the main body-side support 6, and is provided on both sides of the rear surface of the blade-side support 8. And an arc-shaped rail means 18 (see FIG. 5) centered on the longitudinal axis C. Each of the rail means 18 is slidably fitted in each of the guide groove means 16. Guide groove means 16 and rail means 18
Will be described later in detail.

Next, the structure of the main body side support 6 will be described. With reference to FIGS.
Comprises a substantially rectangular base plate 20, a bracket means 22 provided on the rear side of the base plate 20,
It includes the guide groove means 16 (see FIG. 5) provided on the front side of the base plate 20 and is mounted on the earthmoving vehicle main body 4 side via the bracket means 22. The bracket means 22 is fixed to the rear surface of the base plate 20 and has a U-shaped frame 24 extending in the lateral direction, and a pair of support plates 26 fixed to the lateral center of the frame 24 and the base plate 20. 28, and a pair of support plates 30 and 32 and 34 and 3 respectively fixed to both lateral ends of the frame 24 and the base plate 20.
6 is included. A hole coaxial with the boss is formed in each pair of the support plates, so that a pin (not shown) can be inserted. As shown in FIG. 1, the pair of support plates 26 and 28 and the tilt link 38 provided on the earthmoving vehicle main body 4 are pin-connected by a configuration known to those skilled in the art. Also, each of the pair of support plates 30
, 32 and 34 and 36, and a pair of lift arms 40 provided on the earthmoving vehicle main body 4 are pin-connected by a configuration known to those skilled in the art.

As shown in FIG. 5, each of the guide groove means 16 is constituted by stacking two plate members 42 and 44 and fixing them to both sides of the front surface of the base plate 20. Each of the plate members 42 is fixed to both sides of the front surface of the base plate 20, and their mutually facing inner end surfaces are formed in the shape of an arc 46 centered on the longitudinal axis C as shown in FIG. ing. On the other hand, as shown in FIG. 5, each of the plate members 44 is fixed to each of the plate members 42 by bolts 48 via shims, and their mutually facing inner end faces are formed as shown in FIG. Are formed in the shape of an arc 50 centered on the longitudinal axis C, respectively. The radius of each arc 50 of the plate member 44 is
The guide groove means 16 is formed by making the radius of each arc 46 smaller than the radius of each arc 46. 6 through FIG.
In each of the configurations of the guide groove means 16, only the plate member 42 is shown.

A bracket 52 for mounting the head end of the tilt cylinder 14 is provided on one upper end of the base plate 20 and the frame 24 in the horizontal direction.
Bracket 52 includes a pair of plates 54 and 56. A boss and a coaxial hole are respectively formed in the pair of plates 54 and 56 so that a support pin described later can be inserted. A boss 58 is fixed to the front surface at the lower end in the lateral center of the base plate 20. The boss 58 and the base plate 20 are formed with through holes 60 centered on the longitudinal axis C.

Next, the configuration of the blade-side support 8 will be described. 9 to 11, the main body of the blade-side support 8 indicated by a two-dot chain line may have a well-known configuration. Here, only the portions related to the present invention will be described. As shown also in FIG. 5, each of the rail means 18 is fixed to both sides of the rear surface of the blade-side support 8 and is fitted to each of the guide groove means 16.
2 are included. Each of the plate members 62 is fixed to the rear surface of each of the plate members 64 fixed to both sides of the rear surface of the blade-side support 8. The outer end face of each of the plate members 62 is formed in an arc shape 66 centered on the longitudinal axis C. Each outer end face of the plate member 64 is also formed in an arc 68 with the longitudinal axis C as a center. Plate member 6
By forming the radius of each of the arcs 66 to be larger than the radius of each of the arcs 68 of the plate member 64, the plate member 62 can be fitted into each of the guide groove means 16. Each arc 66 of the plate member 62
Of the plate member 4 in the guide groove means 16
2 is formed slightly smaller than the radius of each arc 46,
The radius of each arc 68 of the plate member 64 is equal to the radius of each arc 50 of the plate member 44 in the guide groove means 16.
Is formed smaller than the radius of.

A bracket 70 for mounting the rod end of the tilt cylinder 14 is provided on the rear surface of the blade-side support 8 above the other end in the horizontal direction. The bracket 70 includes a support plate 72 fixed to the rear surface of the blade-side support 8, an L-shaped frame 74 fixed to the support plate 72, and a pair of plates 76 and 78 fixed to the L-shaped frame 74. Contains. A boss boss and a coaxial hole are formed in the pair of plates 76 and 78, respectively, so that a support pin described later can be inserted. A boss 80 is fixed to the rear surface of the lower end of the blade-side support 8 in the lateral center. Boss 80
Is formed with a through hole 82 centered on the longitudinal axis C.

FIGS. 2 to 4 show a state in which the blade-side support 8 configured as described above is mounted on the main-body-side support 6. In this mounting state, the boss 80 of the blade side support 8 and the boss 58 of the main body side support 6
Are positioned in axial contact with each other, and a pin 84 (see FIG. 2) is inserted into each of the through holes 82 and 60. At both ends of the pin 84, a retainer 8 having a larger diameter is provided.
6 and 88 are fixed by bolts, respectively.
4 is prevented from coming off. The axis of the pin 84 coincides with the longitudinal axis C. On the other hand, the plate member 62 in each of the rail means 18 of the blade side support 8
Are slidably fitted in the guide groove means 16 in the main body side support 6. With the configuration described above, the blade-side support 8 is mounted on the main-body-side support 6 such that the blade-side support 8 can pivot via the pin 84.

A pair of plates 7 of the blade-side support 8
6 and 78 include the rod end 9 of the tilt cylinder 14.
0 is connected via a support pin 92 to the main body side support 6.
The pair of plates 54 and 56 have a tilt cylinder 1
The four head ends 94 are connected via support pins 96. The protruding end of each support pin (plates 78 and 56)
Side) is formed with an annular groove. The ends of the retainers are inserted into the respective annular grooves, and the respective retainers are fixed to the plates 78 and 56 by bolts. This prevents the support pins 92 and 96 from coming off. When the tilt cylinder 14 is expanded and contracted, the blade-side support 8 is turned around the pin 84 with respect to the main-body-side support 6.

Next, a hydraulic circuit of a working device provided with the above-described tilt mechanism will be described. In FIG. 12, discharge pressure oil from a hydraulic pump 102 driven by an engine 100 is supplied to directional control valves 104, 106, 108 and 1.
It is configured to be guided to the oil tank 112 through 10. The directional control valve 104 controls the angle cylinder 114 for one blade described in FIG. 1, and the directional control valve 106 controls the angle cylinder 114 for the other blade.
6, the directional control valve 108 controls the pitch cylinder 118 connected to the tilt link 38 of FIG. 1, and the directional control valve 110 controls the pair of lift cylinders connected to the pair of lift arms 40 of FIG. 120 are each configured to control. The above hydraulic circuit, the configuration of each cylinder and the direction control valve may be known to those skilled in the art,
Description is omitted.

In the above hydraulic circuit, the directional control valve 108
A diverter valve (diverter valve) 122 is provided between the oil passages connecting the cylinder and the pitch cylinder 118. The tilt cylinder 14 is configured to be controlled by switching a flow dividing valve 122. Dividing valve 12
In this example, the switching of No. 2 is controlled by air, and the control of this air passage is performed by turning ON / OFF a solenoid valve (not shown).
It is configured to be performed by turning OFF. The direction control valve 108 is provided with a pitch control lever (not shown) for switching the valve on the driver's seat of the vehicle.
A diversion valve switch 124 for switching the diversion valve 122 is provided at the head of the knob of the pitch control lever. Therefore, the shunt valve selector switch 12
By operating the pitch control lever while pressing 4, the tilt cylinder 14 can be controlled (tilt control).

The features of the above hydraulic circuit are as follows. Since the supply of the pressure oil to the tilt cylinder 14 is performed by switching the flow dividing valve 122, an additional directional control valve can be avoided. In other words, each directional control valve shown in the figure is a four-way control valve. However, if one directional control valve is added to control the tilt cylinder 14, it must be newly developed as a five-way control valve. In addition, problems such as the necessity of two new hydraulic pipes are caused. The use of the flow dividing valve 122 solves these problems. Further, since the flow dividing valve changeover switch 124 is provided on the pitch control lever, tilt control can be performed very easily.

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, but can be variously modified or modified within the scope of the present invention. is there.

[0021]

According to the present invention configured as described above, the following effects can be achieved. (1) a tilt mechanism is provided between the body side support and the blade-side supports, the tilting mechanism, the blade-side support
The port is pivoted about the longitudinal axis to the body side support
It can be mounted freely, with blade side support and main body side support
Between the blade side support and the main body side support
Tilt cylinder for turning around the longitudinal axis
The tilt function can be obtained without changing the existing configuration provided in front of the blade-side support at all. Therefore, especially in the case of a specification change in which a working device without a tilt function is provided with a tilt function, there is no restriction at all on the existing configuration provided in front of the blade side support, so that it is extremely easy and practical at low cost. This is extremely advantageous in terms of design and manufacturing. (2) Since the tilt mechanism is arranged at a position near the rear of the working device and has a simple configuration, the amount of forward overhang can be minimized without a significant increase in weight. As a result, the stability of the vehicle is prevented from being extremely deteriorated. (3) Since the tilt mechanism is provided independently behind the blade-side support separately from the existing configuration provided in front of the blade-side support, a tilt function is further added to the multifunctional blade. Even in such a case, each mechanism is prevented from being concentrated in front of the blade supporting body as in the related art. Therefore, despite having the tilt function, the configuration provided in front of the blade-side support can be simplified more than before, and the design, assembly, and maintenance are significantly improved. This also enables the structure provided in front of the blade-side support to have more functions than before, while having a tilt function. Since the tilt mechanism itself has a simple configuration, durability is also improved. (4) The tilt cylinder, which is a component of the tilt mechanism,
Since it is provided at a rear position away from the blade, it does not obstruct the view from the driver's seat of the vehicle, which is advantageous in terms of work and safety.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a part of an earthmoving vehicle provided with an embodiment of a working device having a tilt mechanism configured according to the present invention.

FIG. 2 is a view of the tilt mechanism in FIG. 1 as viewed from the rear in the traveling direction of the earthmoving vehicle.

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a side view of FIG. 2 as viewed from the left side.

FIG. 5 is a sectional view taken along the line AA of FIG. 2;

FIG. 6 is a view of the main body side support in FIG. 2 as viewed from the rear in the traveling direction of the earthmoving vehicle.

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a side view of FIG. 6 as viewed from the left side.

9 is a view of a tilt mechanism portion of the blade-side support in FIG. 2 as viewed from the rear in the traveling direction of the earthmoving vehicle.

FIG. 10 is a top view of FIG. 9;

FIG. 11 is a side view of FIG. 9 viewed from the left side.

FIG. 12 is a schematic view showing an embodiment of a hydraulic circuit of a working device provided with a tilt mechanism according to the present invention.

[Explanation of symbols]

 2 Working Device with Tilt Mechanism 4 Earthmoving Vehicle Main Body 6 Main Body Support 8 Blade Side Support 10 Blade 12 Tilt Mechanism 14 Tilt Cylinder 16 Guide Groove Means 18 Rail Means 20 Base Plate 22 Bracket Means 42 and 44 Plate Member 62 Plate Member Front and Back Direction axis

Claims (3)

(57) [Claims] A body support provided on an earthwork vehicle body, a blade support provided in front of the body support, and a blade mounted in front of the blade support. A tilt mechanism is provided between the side support and the blade side support , and the tilt mechanism connects the blade side support to the main body side support.
The port is attached to the port so that it can pivot about the longitudinal axis, and
Between the blade side support and the main body side support.
Card side support with respect to the body side support in the front-back direction
Provide a tilt cylinder for turning around the axis.
And a working device provided with a tilt mechanism. 2. The tilt mechanism is provided on both sides of the front surface of the body-side support, and is provided on both sides of the rear surface of the blade-side support. and includes an arcuate rail means around the front post axis, each of said rail means is fitted slidably in each of said guide groove means, tilt 請 Motomeko 1, wherein Working device with a mechanism. 3. The body-side support includes a substantially rectangular base plate, bracket means provided on a rear surface side of the base plate, and guide groove means provided on a front surface side of the base plate. Each of the guide groove means is mounted on the earthwork vehicle body side via the bracket means, and each of the guide groove means is constituted by fixing two plate members to both sides of the front surface of the base plate. A plate member fixed to both sides of the rear surface of the blade-side support and slidably fitted in each of the guide groove means .
Working apparatus we are having a tilt mechanism 請 Motomeko 2 wherein.