JPH0328542B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for adding operating functions such as left and right tilting to an elevating and lowering support device for working tools such as construction machines and snowplows.

Although it is a minimum requirement to provide lifting devices for construction machinery, snowplows, etc., it is a minimum requirement for construction machinery, snowplows, etc., to move the tools laterally so that work can be done to the side of the main body. , Tilt left and right (rolling) to keep the work tool in line with the road surface.
These functions, such as vertical tilting (pitching), are added to the lifting support device in combination as needed. Utility Model Application No. 69729, 1983, which is a well-known "moving device for snow removal equipment,"
No. 69730, Utility Model No. 54-69731, Utility Model No. 57-50354
Both numbers have a structure that has a moving device that includes a sliding part in the lateral direction and a cylinder that is a lateral force input device, and is used to remove snow from the side of the snowplow body and to move it along the road surface. It does not have a left/right tilt function. Utility Model Publication No. 52-54920, ``Movement mechanism for snow removal equipment in snowplow vehicles,'' has individual fluid cylinders that function for the purposes of lateral movement, left-right tilting, and front-back tilting, and uses each individual function. It is a collection of structures. Utsukai Showa 57-101161
The item ``Work implement support device'' has a common rotating shaft, a left-right tilt cylinder, and a front-back tilt cylinder, and is an additional device that is separate from the lifting support device. All of these cases add equipment necessary for other functions in addition to the lifting support device.
Therefore, it tends to become more complicated and its weight increases accordingly. In recent years, it has been desired to increase the size of working tools due to usage requirements, but the weight increase of working tools is restricted due to the restriction on the wheel load on the road surface, and a lightweight structure is desired, and the structure of the above-mentioned example has a problem. Furthermore, it is not preferable that the moving device has a sliding portion because it tends to become stiff. Particularly in the case of snowplows, when snow builds up and freezes, it is necessary to remove it, so it is desirable to avoid this.

The purpose of the present invention is to easily add multi-functions such as lateral movement, left-right tilting, front-back tilting, etc. with a simple and lightweight structure that adds only a few functional elements to the original lifting support structure of a work tool. The purpose of the present invention is to provide a lifting and lowering support device for working tools.

The present invention relates to a lifting support device for a working tool that connects a support and a working tool with an upper link and a lower link, and is provided with a forced input device for lifting and lowering that acts between the support and the working tool. All of them are structured so that they can swing not only vertically when going up and down, but also horizontally, and each of the upper and lower links is equipped with a lateral force input device that acts between the support and the work tool. Alternatively, either the upper link or the lower link can swing in the vertical direction as it goes up and down, but has a rigid support structure in the lateral direction, and the other link can swing horizontally as well as in the vertical direction as it goes up and down. The structure is such that it can swing in the horizontal direction, and a lateral force input device that acts between the support and the work tool is provided on the side of the upper link and the lower link that can swing in the horizontal direction. .

The details of one embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the construction machine or snowplow as a whole, which is the object of the present invention, and 1 is a working tool;
Reference numeral 2 denotes a vehicle, which has an elevating and lowering support device consisting of an upper link 3 and a lower link 4 between them, and is equipped with a forced input device 5 for elevating and lowering, such as a hydraulic cylinder for elevating the work tool 1.

FIG. 2 is a perspective view showing the most basic embodiment of the first invention, in which reference numeral 6 forms a support for supporting the working tool 1 in the chassis of the vehicle 2. The two upper links 7, 8 and the lower links 9, 10 are both swingable in the lateral direction, and the pivot point with the work tool and the pivot point with the support body both have a ball joint structure. 1
1 is a lateral forced input tool on the upper link side, and 12 is a lateral forced input tool on the lower link side, one end of which is directly connected to the support body, and the other end of which is directly connected to the work tool. . Each pivot point is a ball joint structure. Reference numeral 5 denotes a forced input tool for lifting and lowering, one end of which is pivoted directly to the support and the other end pivoted directly to the work tool.
Both pivot points are ball joint structures. The forced input tools 11 and 12 in the lateral direction and the forced input tool 5 for raising and lowering the working tool are both hydraulic cylinders. When the lateral force input tools 11 and 12 are extended by an equal amount, the upper links 7 and 8 and the lower links 9 and 10 swing in the lateral direction by the same amount, causing the work tool to move laterally in the direction of arrow A. When the horizontal forced input tool 11 is extended and the forced input tool 12 is retracted, the upper links 7 and 8 swing in the direction of arrow A, and the lower links 9 and 10 swing in the direction opposite to arrow A. The upper and lower parts of the working implement will move laterally in different directions, rotating in the direction of arrow B, and giving the working implement a left-right inclination. When the forced input tool 5 for raising and lowering the working tool is retracted, all of the upper links 7, 8 and lower links 9, 10 rotate upward, and the working tool is raised.
It goes without saying that an operation opposite to that described above can be performed by controlling the hydraulic pressure to each forced input tool, and a combined operation is also possible. That is, work is performed by moving the work tool laterally at a high position. You can freely choose to work at a low position, tilting left or right and following the road surface. In this example, in addition to the upper link, lower link, and forced input device for raising and lowering the work tool, which are necessary for the lifting support structure, a simple lateral forced input device is added to each of the upper link and the lower link. The structure allows for multiple functions such as those mentioned above. In this embodiment, a total of four links, two upper links and two lower links, are used to connect the support and the work tool. Therefore, when vertical displacement is applied and left/right inclination is taken, or when lateral displacement and left/right inclination are made at the same time, assuming that the four pivot points on the support side are in one plane,
The four pivot points on the work tool side cannot be located in one plane because there is a difference in cosine amount due to the difference in swing angle of each link. In other words, a phenomenon occurs in which the work tool is twisted. However, since the difference in the cosine amount is small, it can be put to practical use by giving elasticity to the tool, but
It is necessary to take this into account during design. FIG. 3 is a perspective view showing an embodiment of the second invention, in which a variable length link 13 is provided as an upper link between the chassis, which is a support body 6, and the working tool 1. A hydraulic cylinder is used for the variable length link, and both ends are pivotally connected to the support and the implement with ball joints. Reference numeral 16 denotes a lateral force input tool, which is a hydraulic cylinder with ball joints at both ends and is directly pivotally connected to the support and the work tool. The lower link mechanism has a triangular planar lower link plate 1.
4 and a lower link 15, the lower link plate 14
It is pivotally connected to a support body (shear seat) 6 at two pivot points 14A and 14B at both ends on the rear edge, and can swing only in the vertical direction. The tip pivot point 14C of the lower link plate 14, to which the work tool 1 is pivoted, is rigid in the lateral direction. The link 15 has the purpose of keeping the support body 6 and the work tool parallel, and both ends thereof are pivotally connected to the support body and the work tool. Reference numeral 17 denotes a forced input device for lifting and lowering, the upper end of which is pivotally connected to the support and the lower end to the protrusion 14D of the lower link plate 14, and the lifting force is transmitted to the working tool via the tip pivot point 14C of the lower link plate 14. be done. Both the forced input tool for lateral direction and the forced input tool for elevation are hydraulic cylinders. When the horizontal forced input tool 16 is extended,
The pivot point with the work tool 1 moves in the direction of arrow A.
However, the lower link plate 14 prevents the work tool 1 from moving laterally. Therefore, the working implement is rotated in the direction of arrow B and tilted left and right. When the variable length upper link (hydraulic cylinder) 13 is extended, the upper part of the work tool 1 moves forward, but the lower link plate 14 moves downward.
Since it is held by the lower link 15, it does not move forward. Therefore, the working tool 1 is rotated in the direction of arrow C and tilted forward. The lifting and lowering functions are the same as in FIG. In this embodiment, in addition to lifting and lowering, functions of left-right tilting and front-back tilting are added. By pivoting the lower end of the forced input device for lifting and lowering to the protrusion 14D of the lower link plate 14, the structure of the pivot bracket on the work tool side is simple and has the advantage that it does not require much space. . Fig. 4 is a perspective view showing another embodiment of the present invention. Compared to Fig. 3, the lower link structure is different and has a lateral movement function added, and the lower link mechanism swings in the lateral direction. It consists of possible lower links 18 and 19, and 20 is a lateral forced input tool. By simultaneously extending the upper lateral forced input tool 16, the working tool moves laterally in the direction of arrow A, as in the case of FIG. By extending the lateral forced input tool 16 and retracting the forced input tool 20, the work tool rotates in the direction of arrow B and tilts left and right as in the case of FIG. The longitudinal inclination and elevation are the same as in the case of FIG. Note that both ends of the lower link 18 are ball joints that serve as pivot points 1 for the forced input device for lifting and lowering.
8A stabilizes the lower link 18 as a cylindrical pin structure. Both ends of the lower link 19 are ball joints. This embodiment is an elevating support device that has all the functions of lateral movement, left-right tilting, and front-back tilting. FIG. 5 is a perspective view showing another embodiment of the present invention, in which the upper link 21 has a turnbuckle structure and variable length, and a pivoting portion 21A of the lateral force input device 22 is provided at the intermediate portion of the link. I have it too. The other end of the forced input tool 22 is pivoted directly to the support body 6.
The lower link mechanism consists of lower links 23 and 24, both of which are connected to each other at a pivot point 25 to form a laterally rigid structure as a whole. Although the structure is different from that of the lower link in FIG. 3, it has a similar function, and the structural difference between the two should be selected based on various design conditions. By manually operating the turnbuckle of the upper link 21, the longitudinal inclination can be adjusted to obtain the optimum condition with the road surface. By extending the lateral forced input tool 22, it is possible to give the working tool a left-right inclination, as in the case of FIG. The lifting and lowering is the same as in the case of FIG. This embodiment uses the conventional method of making the upper link a variable structure to provide longitudinal inclination, and does not have a particularly complicated structure. The present invention has the advantage that the conventional method of making the links variable in length and providing longitudinal inclination can be easily applied. FIG. 6 is a perspective view showing another embodiment of the present invention, in which the upper link forms a substantially isosceles triangle in plane with the hydraulic cylinders 26 and 27, and by extending both the hydraulic cylinders 26 and 27, the length can be adjusted. By retracting the hydraulic cylinder 26 and extending the hydraulic cylinder 27, it has the same effect as a forced input tool in the lateral direction and can give the working tool a horizontal inclination. can give. It has a laterally rigid structure consisting of two lower links 28, 29 and an obliquely arranged turnbuckle rod 30.
By adjusting the rod length with a turnbuckle, it is possible to correct errors in the lateral position of the work tool. Each of the hydraulic cylinders 26 and 27 has a ball joint at both ends, and is a link capable of swinging in the lateral direction, and can be interpreted as a lateral force input device. This embodiment is an effective structure when the frequency of operations for tilting forward and backward and tilting left and right are similar. Although a hydraulic cylinder is used as the forced input device in the embodiments shown in FIGS. 2 to 6, it may be replaced with, for example, an electric thruster. Further, a configuration may be adopted in which the structure of the upper link and the structure of the lower link are exchanged.

For lifting support devices with general upper and lower links installed on working tools such as construction machinery and snowplows, the link is structured to be able to swing laterally, and a lateral force input device is added. It has a simple structure with only a chisel, and has the advantage of being lightweight due to the fact that there are few added functional items.In addition to the lifting function, it also has the ability to easily provide multi-functions such as lateral movement and left/right tilting of the work tool. This has the advantage that the structure in which the upper link or the lower link is made variable in length and tilts back and forth to the working tool can be easily applied.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the entire construction machine or snowplow that is the object of the present invention, Fig. 2 is a perspective view showing a basic embodiment of the first invention, and Fig. 3 is the basics of the second invention. Perspective views showing embodiments, FIGS. 4 and 5
6 are perspective views showing other embodiments of the present invention. 1... Work tool, 2... Vehicle, 5... Forced input tool for lifting, 7, 8... Upper link, 9, 10... Lower link, 11, 12... Forced input tool in lateral direction, 1
3...Variable length link, 14...Lower link board, 15
...Bottom link, 16...Horizontal forced input tool, 1
7... Forced input device for lifting/lowering.

Claims (1)

[Scope of Claims] 1. In an elevating and lowering support device for a working tool, the support and the working tool are connected by an upper link and a lower link, and the upper link is provided with a forced input device for lifting and lowering that acts between the support and the working tool. All of the lower links are designed to be able to swing horizontally as well as vertically as they go up and down, and each of the upper and lower links has a lateral forced input that acts between the support and the work tool. What is claimed is: 1. A device for lifting and lowering a work tool, characterized in that the device is configured to include a tool. 2. In a lifting support device for a working tool that connects a support and a working tool with an upper link and a lower link and is equipped with a forced input device for lifting and lowering that acts between the support and the working tool, either the upper link or the lower link is used. One side has a structure that allows vertical movement as it goes up and down, but has a rigid support structure in the lateral direction, and the other side has a structure that allows vertical movement as well as horizontal movement as it goes up and down, and the top link 1. A lifting and lowering support device for a working tool, comprising: a lateral force input device that acts between the support body and the working tool on the laterally swingable side of the lower link.