JPS6149521B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stroke adjustment device for a hydraulic cylinder.

Conventionally, the stroke of the piston rod of a hydraulically or pneumatically operated cylinder is set at the same standard stroke for each manufacturer, so in order to obtain a hydraulically operated cylinder with the desired stroke, it is necessary to purchase a custom-made product. However, there were many disadvantages for the purchaser, such as it took many days to obtain the product and the purchase price was high. Also,
Depending on where the hydraulic cylinder is used, it may be necessary to adjust the stroke of the cylinder after it has been installed, but this has not been possible with conventional standard cylinders. Additionally, it is often necessary to independently set the stroke member actuated by the hydraulically actuated cylinder and the hydraulically actuated cylinder to a desired position, which has heretofore not been easily accomplished.

The present invention has been made to eliminate the above-mentioned drawbacks of the conventional art, and for this purpose, the stroke adjustment device according to the present invention includes a threaded portion provided on the piston rod that can protrude outward from the cylinder cylinder of a hydraulically operated cylinder.
A stopper that can engage with the end of the cylinder is screwed onto the threaded portion, a nut provided at one end of the connecting member so as to be able to abut against the stopper is screwed onto the threaded portion, and the connecting member It is characterized in that the stroke member is fixed on the threaded portion provided at the other end with a nut so that its position can be adjusted.

Hereinafter, the content of the present invention will be explained along with the embodiment shown in the attached drawings. The drawing shows a hydraulic cylinder in the most extended state, and in the drawing, 1 indicates the cylinder body of the hydraulic cylinder, 2 3 is a flange provided at the end of the cylinder body 1 and forms a part of the cylinder body; 3 is a piston rod that extends into the cylinder body 1 through the flange 2; and 4 is a cylinder body of the piston rod 3. 1 a threaded portion provided on the outwardly projecting portion; 5 a nut-shaped stopper screwed onto the threaded portion 4 and slidable on the piston rod 3; 6 actuated by a hydraulically actuated cylinder. Stroke member 7 indicates a connecting member that connects piston rod 3 and stroke member 6, respectively.

The flange 2 provided at the end of the cylinder body 1 is connected to a flange (not shown) provided at the other end of the cylinder body 1, and is screwed into a plurality of connecting rods 8 and the ends of the connecting rods. It is fixed to the end of the cylinder body 1 by tightening with a nut 9.

The connecting member 7 has a nut portion 10 provided at one end thereof screwed onto the threaded portion 4, and a threaded portion 11 provided at the other end of the connecting member 7 through a hole (not shown) formed in the stroke member 6. After inserting the piston rod 3 into the stroke member 6, the piston rod 3 and the stroke member 6 are connected by tightening nuts 12, 12 from both sides of the stroke member 6. Note that when the nut portion 10 of the connecting member 7 is screwed onto the threaded portion 4, it simultaneously engages the stopper 5.
By tightening the end of the stopper 5, it also functions as a lock nut.

With such a configuration, the piston rod 3 can be moved by a distance a from the fully extended state shown until the stopper 5 abuts the flange 2, thereby obtaining a corrective stroke a of the hydraulically operated cylinder. The correction stroke a can be arbitrarily changed within the standard stroke range of the hydraulic cylinder used by appropriately selecting the length b of the stopper 5 and by appropriately positioning the stopper 5 on the threaded portion 4. can. After installing the hydraulic cylinder to the stroke member 6, if the stroke a needs to be finely adjusted, the stopper 5 can be turned to change its position, and the position of the connecting member 7 can be adjusted accordingly. Fine adjustments can be made easily. Furthermore, if it is necessary to position the stroke members 6 or the hydraulically actuated cylinders individually, the nuts 1
After loosening the nuts 2 and 12 and setting the stroke member 6 or the hydraulic cylinder at the desired position, the nuts 12 and 12 may be tightened again.

As described above, according to the present invention, a threaded portion is provided on the piston rod that can protrude outward from the cylinder, and a stopper that can be engaged with the end of the cylinder is screwed onto the threaded portion. A nut part provided at one end of the connecting member so as to be able to collide with the stopper is screwed together, and a stroke member is fixed with a nut on the threaded part provided at the other end of the connecting member so that its position can be adjusted. The desired stroke can be easily obtained from a hydraulic cylinder with a standard stroke, and the stroke can be easily adjusted even after the hydraulic cylinder is attached to the stroke member. It is possible to easily set the and the desired positions independently.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Cylinder body, 2... Flange, 3... Piston rod, 4... Threaded part, 5... Stopper, 6...
Stroke member, 7... Connection member, 10... Nut portion, 11... Threaded portion, 12... Nut.

Claims (1)

[Claims] 1. A threaded portion is provided on the piston rod that can protrude outward from the cylinder of a fluid pressure operated cylinder, a stopper that can engage with the end of the cylinder is screwed onto the threaded portion, and a stopper that can collide with the stopper is screwed onto the threaded portion. A stroke of a stroke member in which a nut part provided at one end of a connecting member is screwed together, and the stroke member is fixed with a nut on a threaded part provided at the other end of the connecting member so that the position can be adjusted. Adjustment device.