JPH0271938A - Assembly/disassembly device for cylinder - Google Patents

Abstract

PURPOSE:To increase a rotational torque, to impart a specific joint torque at assembly time and to assemble surely by giving the rotational torque by a cylinder to the joint nut of a piston rod or the cylinder head of a cylinder tube. CONSTITUTION:A work receiving base 11 is slided along a rail 10 according to the length of a cylinder tube or piston rod. At this sliding time, a main body 19 and guide rail 20 are floated by a floating mechanism 25, only a roller is turned on the rail 10 and in case of placing the piston rod, etc., on the work receiving base 11, the main body 19 and guide rail 20 are descended by the weight thereof and the guide rail 20 is abutted to the rail 10. Then, an interposing member 12 interposes the cylinder tube or piston rod, the joint nut or cylinder head provided at the end part thereof is hung on the tool A of a spanner, etc., to which a rotational torque is given by a cylinder 13 and a large joint torque, loose torque are given by expanding the cylinder.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for fastening and disassembling a piston fixing nut to be assembled to a piston rod, or for fastening and disassembling a cylinder head to be assembled to a cylinder tube. This invention relates to a suitable cylinder assembly and disassembly device.

[Conventional technology]

A piston rod 1 of a hydraulic cylinder has a piston 2 fastened and clamped at one end by a fastening nut 3. A cylinder head 5 is screwed onto the end of the cylinder tube 7 as shown in FIG.

When assembling the fastening nut 3 by screwing it onto the piston rod l, or when disassembling the coupled fastening nut 3, prepare a holding device in advance, fix the eye 4 to the clevis receiver of this device, and hold it in this state. Tighten the spanner with nut 3
After fitting, tap the handle of the spanner in the direction of rotation with a hammer, etc.

Similarly, when disassembling and assembling the cylinder head 5, first fix the eye 4 to the clevis holder of the above device, hook a tool such as a spanner on the outer end of the cylinder head 5, and set the loosening torque or tightening torque in the rotational direction. Torque is applied by hitting with a hammer or the like.

[Problem to be solved by the invention]

In the assembly and disassembly method described above, rotational torque is applied manually using a hammer, etc., so large torque cannot be applied.
The specified torque cannot be guaranteed during assembly, and there is a risk of loosening during use.

During disassembly, a large torque cannot be applied, so there may be cases where disassembly cannot be completed. Furthermore, work efficiency is poor because the work is done manually.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cylinder assembly/disassembly apparatus which can provide a large torque, can reliably perform assembly and disassembly, and has improved workability.

[Means to solve the problem]

The structure of the present invention that achieves the above object includes a clamping member that stands up on a pedestal, a workpiece pedestal that is movably provided on a rail extending horizontally from the pedestal via a guide rail and rollers, and a main body of the workpiece pedestal. The workpiece is characterized by comprising a floating mechanism for floating the workpiece from the rail, and a cylinder facing the clamping member and provided at a position opposite to the workpiece holder.

[For production]

The workpiece holder slides along the rail depending on the length of the cylinder tube or piston rod. When the workpiece holder slides on the rail, the main body and guide rail float up using the floating mechanism, only the roller rotates on the rail, and when a piston rod, etc. is placed on the workpiece holder, the main body and guide rail descend due to its weight. Then, the guide rail comes into contact with the rail.

The clamping member clamps the piston rod or cylinder tube, and the fastening nut or cylinder head provided at the end of the clamping member is hooked on a tool such as a spanner that applies rotational torque with the cylinder, and by expanding and contracting the cylinder, a large fastening torque is generated. Loosening torque is given.

〔Example〕

Embodiments of the present invention will be described below based on Figures 1 to 4.

The apparatus of the present invention includes a mount 8, a base 9 extending horizontally from the mount 8, rails 10 provided horizontally on both sides of the base 9, a workpiece holder 11 slidably attached to the base 9 and the rails 10, and a mount. 8, and one or two hydraulic or pneumatic cylinders 13, which face the clamping member 12 and are located on the opposite side of the workpiece holder 11. has been done.

The clamping member 12 includes a support base 14, a guide bolt 15.15 that stands up from the support base 14, a clamping piece 17 that is inserted into the guide bolt 15.15 so as to be vertically movable, and the clamping member 12 is also vertically movable on the guide pole J-15, 15. A nut with a handle 18° 18 which is freely screwed together, and concave clamping grooves 16α, 1 provided opposite to each other in the center of the support base 14 and the center of the clamping piece 17.
6b.

When assembling and disassembling the piston rod fastening nut, clamp the outer periphery of the piston rod on the nut side between the clamping grooves 16α and 16!1, insert the spanner A into the nut at the end of the piston rod, and insert the handle B of the spanner A into the cylinder 130 lot. For side mounting, the part 13α is fixed in place, and by extending and contracting the cylinder 13, rotational torque is applied to the spanner AIC, and it is rotated in the direction for tight tightening or in the direction for loosening.

When installing a piston rod, loosen the nut with handle 18.
7 is moved upward, then the piston rod is inserted between the clamping grooves 16α and 16b, and the clamping piece 17 is further lowered and tightened with the handle nut 18.18.

Assemble the cylinder head of the cylinder tube.

When disassembling the cylinder, the outer periphery of the cylinder tube is similarly held between the holding grooves 16α and 16b, and the cylinder 13 applies rotational torque to a tool such as a spanner hooked to the cylinder head.

The number of cylinders 13 may be one. However, it is also possible to use two cylinders to apply larger torque, and apply rotational torque to a tool such as a spanner from both sides. In this case, one cylinder is expanded and the other cylinder is compressed.

The workpiece holder 11 has a main body 19 and guide rails 20 provided on both sides of the main body 19 and having an opening-shaped groove 20α.
and the clevis receiver 21 provided at the upper end of the main body 19 and the main body 19.
The levitation mechanism 25 and levitation mechanism 2 provided at four lower corners of
5 and a roller 26 provided at the bottom of the roller 5.

The guide rail 20 is fitted into the rail 1O and moves together with the main body 19 along the rail 10, thereby preventing the guide rail 20 from falling off from the rail 10.

The clevis receiver 21 has a cross-sectional shape, and pin insertion holes 22, 23, and 24 are formed on both sides and the bottom, respectively.

The eye provided on the piston rod or cylinder tube is hole 2.
2.23, or a pin or bolt inserted into the hole 24 from above or below. For this reason, both ends of the piston rod and cylinder tube are supported horizontally between the clevis receiver 21 and the clamping member 12, and in this horizontally supported state, the piston rod and the cylinder tube are connected to the fastening nut of the piston rod or the cylinder head of the cylinder tube. Tightening torque and loosening torque are provided by the cylinder 13.

As shown in Figure 4, the flotation mechanism 25 includes a bracket 28 attached to the main body 19, a cylindrical roller holder 26 vertically disposed on the bracket 28, a roller holder 28 provided in the roller holder 26, and a roller holder. It consists of a roller 2G attached to the rail 28 via a pin 29, a stud holder 30 and a spring 31 provided between the roller holder 27 and the roller holder 28, and the roller 26 rotatably rests on the rail IO. are in contact with each other.

The workpiece holder 11 is slid along the rail 10 to an arbitrary position depending on the length of the piston rod or cylinder tube.

At this time, the lifting force of the spring 31 in the floating mechanism 25 pushes up the main body 19 and the idle rail 20 via the roller holder 27, and the guide rail 20
It slides only by the roller 26 without hitting the surface. Therefore, the workpiece pedestal 11 can be easily moved manually.

When the workpiece holder 11 is set at a predetermined position and the eye of the piston rod is fixed to the clevis holder 21, the main body 19 and the guide rail 20 descend against the spring 31 due to the weight, and the groove 20α of the guide rail 20 The upper surface abuts against the rail 10, and the workpiece holder 11 does not move due to friction and becomes stable.

〔Effect of the invention〕

The present invention has the following effects.

(2) The tightening nut of the piston rod or the cylinder head of the cylinder tube receives rotational torque from the cylinder, so the torque is large, and the prescribed tightening torque is applied during assembly to ensure reliable assembly and prevent loosening during use.

Similarly, a large torque is applied during disassembly, so that a situation where disassembly cannot occur does not occur.

■Work efficiency is improved because rotational torque is applied by the cylinder while supporting the workpiece with the clamping part and workpiece holder.

The piston rod and cylinder tube do not move during work.

■The main body and guide rail of the workpiece pedestal are pushed up by a floating mechanism, so they do not come into contact with the rails, and when sliding, the only friction between them and the rails is the rollers, making sliding operations light and smooth.

■Place the piston rod or cylinder tube on the workpiece holder (and the main body and guide rail will descend, and the guide rail will come into contact with the rail, so the workpiece holder will be stably held in a predetermined position during use).

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of the device according to the present invention, Figure 22 is a right side view, Figure 3 is a perspective view of the workpiece holder, Figure 4 is a sectional view of the floating mechanism, Figure 5 and Figure 4 are a cross-sectional view of the floating mechanism. FIG. 6 is a sectional view of the cylinder tube of the piston rod. 8... Frame, 10... Rail, 11... Work holder, 12... Holding member, 13... Cylinder, 19
---Main body, 20... Guide rail, 25... Levitation mechanism, 26... Roller. Figure 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] A clamping member that stands up on a pedestal, a workpiece holder that is movably provided on a rail extending horizontally from the pedestal via a guide rail and rollers, a floating mechanism that levitates the main body of the workpiece holder from the rail, and the clamping member. A cylinder assembly and disassembly device consisting of a cylinder facing a member and located opposite to a workpiece pedestal.