JPH064406U - Cylinder mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] The cylinder stroke is configured so that the effective stroke of the cylinder liner is enlarged in the cylinder mounting portion that is rotatable in two dimensions. A mounting shaft 1 and a joint shaft 4b are arranged orthogonally to each other, and a cylinder 3 is rotatable in a two-dimensional direction. The distance between the center of the mounting shaft 1 and the center of the joint shaft 4b is the radius of the mounting shaft and the joint. It is smaller than the value obtained by adding the axial radius.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a cylinder mounting portion.

[0002]

[Prior art]

 Conventionally, hydraulic cylinders have been widely used for lifting and lowering heavy objects, pushing and pulling, etc.When both sides of the cylinder are pivotally connected to a link, etc., the head side mounting part and piston rod side mounting part are expanded and contracted. The position and angle of the part may change, and in such a case, a bending moment or the like is applied to the mounting part. Therefore, it is not known in the art that the mounting part can be rotated two-dimensionally. It has become. For example, as shown in FIGS. 5 and 6, in the cylinder mounting portion, the joint shaft 8 pivotally supports the mounting body 20 and the cylinder liner 9, and the mounting body 20 is pivotally supported by the mounting shaft 7 on the machine side. The distance Y is between the center of the mounting shaft 7 and the center of the joint shaft 8, and the distance Y is larger than the value obtained by adding the radius 7r of the mounting shaft and the radius 8r of the joint shaft.

[0003]

[Problems to be solved by the device]

 As described above, in the cylinder mounting portion of the prior art, the distance Y is required between the joint shaft 8 and the mounting shaft 7, and since the distance Y exists, the mounting shaft 7 and the joint shaft 8 are respectively provided. There is a problem that the mounting body 20 needs to have a sufficient distance to rotate about the center, and if the total length is restricted, the effective stroke of the cylinder liner 9 is reduced.

[0004]

[Means for Solving the Problems]

 The problems to be solved by the present invention are as described above, and the means for solving the problems will be described below. That is, in the mounting portion on the cylinder base side, the mounting shaft and the joint shaft are arranged orthogonally to each other so that the cylinder can rotate in two dimensions, and the distance between the mounting shaft center and the joint shaft center is the mounting shaft. It is smaller than the sum of the radius and the joint axis radius.

[0005]

[Action]

 The operation of the present invention will be described. In the cylinder mounting portion B, it is possible to rotate in the front-rear direction about the mounting shaft 1 and to rotate in the left-right direction about the joint shaft 4b, and to freely rotate in the two-dimensional direction. The distance between the center and the center of the joint shaft 4b is reduced, and interference with the mutual rotation directions is reduced.

[0006]

【Example】

 The problems to be solved and the means for solving the present invention are as described above. Next, a specific configuration of the present invention will be described with reference to the accompanying drawings. 1 is a rear side view of a tractor, FIG. 2 is an assembled perspective view of a mounting portion of the present invention, FIG. 3 is a plan sectional view of the same, and FIG. 4 is a front sectional view of the same.

Referring to FIG. 1, an embodiment in which a cylinder having a mounting portion according to the present invention is used as a lift link on one side of a work implement mounting device for a tractor will be described. To project the top link 12 and to pivotally connect the lower link 13 to the lower sides of the mission case 21 by laterally projecting the pivot shaft 11 and the like, and to mount the hydraulic case 22 on the upper surface of the mission case 21. Lift arms 23, 23 are projected rearward from both sides of the hydraulic case 22, one side is provided with a lift link at the rear ends of the lift arms 23, 23, and the other side is provided with a cylinder 3 through a cylinder mounting portion B of the present invention. The lift link and the lower end of the piston rod 3a of the cylinder 3 are pivotally connected to a middle portion of the lower link 13 so that the lower link 13 and the top link are connected. The rotary tiller C is attached to the rear end of the blade 12. The rotary cultivator C can be horizontally controlled from the tractor main unit side depending on the condition of the field. To achieve this horizontal control, the cylinder 3 is expanded or contracted from the value of the tilt sensor to tilt the rotary cultivator C left or right. In this way, the desired inclination in the left-right direction is obtained. Since the mounting portion B of the cylinder 3 is two-dimensionally rotated when the rotary tiller C is tilted to the left and right, it is constructed as in the present invention so that it can be smoothly rotated and the stroke can be lengthened.

That is, as shown in FIGS. 2, 3 and 4, the structure of the cylinder mounting portion B of the present invention is such that the mounting shaft 1 is projected from the lift arm 23 and the mounting shaft 1 is fitted therein. A through hole 4a is opened in the center of the joint 4, and joint shafts 4b and 4b are projected on both side surfaces of the joint 4 so as to be orthogonal to the through hole 4a. Is inserted into the support holes of the plates 5 and 5, and the plates 5 are welded and fixed to the base side of the cylinder liner 3b of the cylinder 3 with the joint shafts 4b and 4b sandwiched therebetween.

The mounting shaft 1 is fitted and inserted into the through hole 4a of the cylinder mounting portion B configured as described above, and the retaining pin is fitted into the hole 1a of the mounting shaft 1 so that the mounting shaft 1 does not come off from the cylinder mounting portion B. When 6 is inserted and the cylinder 3 is expanded and contracted, it rotates about the joint shafts 4b and 4b with respect to the left and right inclinations, and rotates about the mounting shaft 1 with respect to the front-rear direction. The two shafts allow it to expand and contract without applying excessive force.

[0010]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. Immediately, the distance between the mounting shaft center of the cylinder mounting part and the joint shaft center was made smaller than the sum of the mounting shaft radius and the joint shaft radius, so that the mounting shaft center and the cylinder liner mounting shaft side end It is possible to shorten the distance to the cylinder part, expand the effective stroke of the cylinder liner, and to downsize the cylinder, so that the cylinder mounting part can be made compact. It became.

[Brief description of drawings]

FIG. 1 is a rear side view of a tractor.

FIG. 2 is an assembled perspective view of a cylinder mounting portion of the present invention.

FIG. 3 is a plan sectional view of the same.

FIG. 4 is a partial front sectional view of the same.

FIG. 5 is a plan view of a conventional cylinder mounting portion.

FIG. 6 is a side sectional view of the same.

[Explanation of symbols]

 B Cylinder mounting part 1 Mounting shaft 3 Cylinder 3b Cylinder liner 4 Joint 4a Through hole 4b Joint shaft 5 Plate

Claims (1)

[Scope of utility model registration request] 1. A mounting portion on a cylinder base side, wherein a mounting shaft and a joint shaft are arranged orthogonal to each other, a cylinder is rotatable in two dimensions, and a distance between the mounting shaft center and the joint shaft center is A cylinder mounting portion structure characterized by being smaller than a value obtained by adding a mounting shaft radius and a joint shaft radius.