Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F3/00—Dredgers; Soil-shifting machines
  • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
  • E02F3/28—Dredgers; 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
  • E02F3/34—Dredgers; 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 with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F3/00—Dredgers; Soil-shifting machines
  • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
  • E02F3/28—Dredgers; 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
  • E02F3/34—Dredgers; 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 with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
  • E02F3/3405—Dredgers; 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 with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism
  • E02F3/3411—Dredgers; 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 with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism of the Z-type

Definitions

• the present invention relates to a working machine link mechanism used for a loading vehicle such as a shovel loader, and particularly to a base end pivotally supported by a vehicle body, and vertically rotating about the pivot point.
• the present invention relates to a work machine link mechanism in which the posture of a bucket connected to the tip of a moving lift arm as described above and to the rear is automatically improved.
• Fig. 1 shows a side view of a conventional work machine of a Shovel loader.
• the lift arm d which is pivotally supported vertically by the lift arm pivot i on the vehicle body a side, has a lift cylinder e When it is extended, it pivots upward, and the bucket c, which is supported on its own in the forward and backward tilting at the bucket pivot j at the tip of the lift d, is tilted.
• the cylinder g When the cylinder g is extended, it tilts backward through the venole crank f and the tilt rod h.
• b is a tire.
• the state of the bucket shown by c in the figure is when excavating earth and sand, etc., and the bottom surface k of the bucket is almost parallel (horizontal) to the ground surface GL. Then, the body connecting pivot of the tilt cylinder g is connected to the £ and the Belkrank f-side connecting pivot is connected to the lift arm d of the m Berkrank f. The pivot is n.
• the connecting pivot between veneole crank f and tilt rod h is p, the connecting pivot between chit rod h and bucket c is q, Connect the vehicle body side connection ⁇ branch of Linder e! ", Lift arm d side Let the pivot point be S.
• the conventional link mechanism shown in FIG. 1 is commonly called a Z-parlinkage, and when the bucket is in the state shown in C in FIG. When the bottom cylinder g is extended, the bottom face k of the bucket rotates in the direction indicated by the arrow K. At this time, the hydraulic pressure on the bottom side g b of the bottom cylinder g It is generally used for loading vehicles that require a large excavating force due to the action of the excavator.
• this link mechanism mainly loads earth and sand, the bucket is tilted backward (as shown in Fig. 1). Designed to maintain the rearward tilting state so that the load does not spill even when the lift arm is turned up and down (design to reduce the angle change in the tilted state) ), But ⁇ ⁇ ? The structure does not eliminate the angle change in the horizontal state.
• the present invention has been made in view of the above-mentioned circumstances, and the purpose thereof is to maintain the function of the conventional Z-Parallengage while maintaining the functions of the conventional Z-Parage cage.
• one end is pivotally supported by a vehicle body, and the other end is extended forward of the vehicle body, and a pivot point at one end is provided.
• a lift arm that swings up and down around the center of the lift arm, and a bucket that has a rear lower part pivotally supported by the front end of the lift arm and is capable of tilting back and forth.
• a bell crank pivotally supported at a substantially middle portion in a longitudinal direction by a foot arm, and a pivot between a lower end of the bell crank and an upper rear portion of the bucket.
• a tilt cylinder that is pivotally connected between the connected tilt rod and the vehicle body and the other end of the bell rank, and that tilts the bucket.
• a working machine link mechanism of a loading vehicle such as a shovel loader
• the lift from a pivot point between the bucket and the lift arm.
• X be the distance between the arm and the pivot point between the above-mentioned bell rank and the above-mentioned lift arm from the pivot point between the above-mentioned lift arm and the above-mentioned bell rank.
• a triangle connecting the pivot point of the tilt rod to the bell rank and a pivot point of the lift arm to the vehicle body and the bell point of the tilt cylinder The triangle connecting the pivot point to the rank and the pivot point of the tilt cylinder to the car body, and the pivot point of the lift arm to the car body and the bell of the tilt rod.
• the triangles connecting the pivot point to the crank and the pivot point to the baguette of the tilt mouth pad are respectively
• Working machine Li emissions-click mechanism shall be the Toku ⁇ that you have a similar relationship to the provision of It is.
• the bottom cylinder oil pressure of the tilt cylinder can be used during excavation, and the shock at the time of unloading at a high boom level is reduced.
• the z-bar linkage such as, the bucket can be moved up and down horizontally without the tilt cylinder expanding and contracting when the lift arm rotates. Therefore, versatility and operability can be improved.
• Fig. 1 is a schematic side view for explaining the operation of the work machine of the conventional shovel loader.
• FIG. 2 is a schematic side view showing a specific example of the present invention
• FIG. 3 is an operation explanatory view of the specific example shown in FIG.
• FIG. 4 is a diagram showing a comparison of bucket tilt angles with respect to a specific example of the present invention and a conventional example.
• FIG. 2 shows a side view of the work machine of the Shovel loader according to the present invention.
• the pivot arm 0 on the vehicle body side (in the following description, and in FIGS. 3 and 4 for simplicity, the pivot arm and its The lift arm 1, which is pivotally supported on its own, rotates upward when the lift cylinder 2 extends, and the same symbol is used for the center.
• the distance between the pivot A of the lift arm 1 and the bracket 3 and the distance between the pivot B of the lift arm 1 and the belt crank 5 are determined.
• X is the distance between the pivot point B of the lift arm 1 and the bell crank 5 and the distance between the vehicle 9 and the pivot point 0 of the lift arm 1 is Y
• Y the distance between the vehicle 9 and the pivot point 0 of the lift arm 1
• triangles formed on the vehicle body 9 side and the bucket 3 side Are set so that they are similar to each other.
• the operation will be described.
• the bucket 3 is placed on the ground surface GL with the bucket 3 as shown by the solid line in FIG. 2 and the tilt cylinder 4 is not operated. Even if the lift arm 1 is turned upward, ⁇ ⁇ ⁇ ⁇ CAOBE and AADCAOFE always occur.
• the bucket 3 rotates with the above attitude with respect to the ground surface GL line, and the bucket always remains horizontal.
• T The relative angle of T depends on the position of the lift arm, T is always constant.
• 0 F is a line segment fixed to the vehicle.
• a straight line L in FIG. 4 indicates a bucket inclination angle 0 of the bucket bottom surface 11 when the lift arm 4 is rotated up and down.
• the angle of the conventional one changes by a maximum of about 20 ° as shown by the curve R.
• ⁇ For the present invention, as shown by the straight line L. Completely water Understand that it works normally

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Shovels (AREA)
• Operation Control Of Excavators (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=16942483

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Citations (2)

Family Cites Families (2)

• 1988
  • 1988-09-19 JP JP63232641A patent/JPH0285423A/ja active Pending
• 1989
  • 1989-09-19 EP EP19890910187 patent/EP0394467A4/en not_active Withdrawn
  • 1989-09-19 AU AU42140/89A patent/AU631139B2/en not_active Expired - Fee Related
  • 1989-09-19 WO PCT/JP1989/000949 patent/WO1990003471A1/ja not_active Application Discontinuation
• 1990
  • 1990-05-17 KR KR1019900701025A patent/KR900702147A/ko not_active Application Discontinuation

Patent Citations (2)

Non-Patent Citations (1)

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