JPS6155406A - Fixture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fastening tool that is suitably used to connect members, particularly to fasten members that perform relative rotational motion so that they do not separate. It is something.

[Prior Art] Bolts are known as a typical fastening device for fastening two members together so that they do not come apart. Therefore, it is not suitable for fixing members that perform relative rotational motion so that they do not come apart, and loosening becomes a problem, especially when the two members rotate relative to each other in forward and reverse directions. Various other fastening tools have been developed, but conventional ones have complicated structures, require time and effort to fasten, or (1) have weak fastening force and may come off due to vibrations, etc. 6 [Problems to be Solved by the Invention] The present invention has the disadvantage that the fixed state is released due to relative movement of the two fixed members, vibrations applied from the outside, etc. The purpose of this invention is to solve the problem that it takes time and effort to adjust shims to adjust the axial clearance to a desired value.

[Means for Solving the Problems] In order to achieve the following objects, the present invention has the following features:
a locking head attached to the surface of the member; a shaft protruding from the head of the lock I) and penetrating the first member and being inserted into the mounting hole of the second member; and a threaded hole provided at the axial center of the locking head, with only a portion corresponding to the insertion end of the shaft being an incomplete thread, and a split groove provided at the insertion end of the shaft. and a set screw screwed into the screw hole from the head side of the first floor of the section,
The shaft portion may be fixed in the mounting hole of the second member by threading the set screw into the incompletely threaded portion and expanding the diameter of the insertion end portion of the shaft portion. Features.

[Operation] According to such means, when the shaft portion is inserted through the first member and into the mounting hole of the second member, and the set screw screwed into the screw hole is screwed, When the cent screw rides on the incompletely threaded portion, the insertion end of the shaft portion expands in diameter and is firmly pressed against the inner circumferential surface of the mounting hole. As a result, the shaft portion is fixed in the mounting hole so that it cannot come out, and the two members are fixed so that they will not come apart.

[Embodiments] Hereinafter, embodiments in which the present invention is applied to a portion of a rotary wave body energy converter will be described with reference to the drawings.

The rotary energy converter shown in FIGS. 1 to 3 has a configuration as shown in Japanese Patent Application Laid-open No. 77179/1983. That is, this energy converter includes a housing 1,
A torque ring is fitted to the inner periphery Ia of the housing L so as to be relatively rotatable via the first hydrostatic bearing 2 of at, and has an inner flat surface 3 inside a portion corresponding to each of the hydrostatic bearings 2. 4, a plurality of pistons 6 which are disposed inside the torque ring 4 and whose tip surfaces are in contact with the inner plane 3 via the second hydrostatic bearing 5, and each of these pistons 6 is slidable. a cylinder barrel 8 that holds the pistons 6 and forms a space 7 for fluid inflow and outflow; When the housing 1 and the torque ring 4 are rotated relative to each other with the barrel 9 that rotatably supports the barrel 8 and the axis n of the bottle 9 being eccentric from the axis m of the housing 1, the volume increases. A pair of fluid flow channels 11, 12 are provided which communicate with the space 7 whose volume is to be increased and the space 7 which is to be reduced in volume, respectively. The fluid filling each space 7 is guided to the corresponding first and second hydrostatic bearings 2.5 through the fluid passages 13.14, and is introduced into the first hydrostatic bearing 2. The static pressure of the fluid and the static pressure of the fluid introduced into the second static pressure bearing 5 generate a couple force around the rotation axis m in the torque ring 4. In addition, 15 in the figure is the base end block portion 9 of the bottle 9.
16 is a hydraulic actuator for moving the base end block portion 9a of the bottle 9 to the other side against the urging force of the spring 15; 17 is a hydraulic actuator in the high pressure port 18; This is a pressure compensating valve that is switched to supply pressure fluid for actuation to the actuator 16 when the fluid pressure goes around -1 times the set value.

Therefore, as shown in FIG. 1, in a state where the axis n of the bottle 9 is eccentric from the rotation axis m, a high-pressure fluid is passed through the first fluid circulation system path 11, for example. 2
When supplied to the space 7 existing in the right half of the figure, a couple is generated in the torque ring 4 that tends to rotate the torque ring 4 in the direction of arrow S, and the function as a motor is exhibited.

Further, if the torque ring 4 is rotated by an external force, for example, in the direction of arrow R, a high-pressure wave body is discharged from the first fluid flow system path 11 (see arrow Q), and the pump can be used as a pump. functions are carried out.

A fastener 21 according to the present invention is provided between the bottle 9 and the cylinder barrel 8 of such an energy converter to prevent the cylinder barrel 8 from coming off the bottle 9. In detail, the bottle 9 has a truncated conical shape, and its base end block portion 9a is connected to the housing l.
It is supported by On the other hand, the cylinder barrel 8 is ring-shaped and rotatably fitted around the outer periphery of the bottle 9, and is connected to the torque ring 4 via an Oldham joint 22. In other words, the cylinder barrel 8 is configured to rotate in synchronization with the torque ring 4. Then, a concave part 8a is provided on the opening end surface of this cylinder/hale 8, and a disc 8b is fitted into this concave part 8a.
The disk 8b, which is the first member, and the bottle 9, which is the second member, are fixedly attached by the 147 fitting 21.

As shown in FIG. 4, the fastening tool 21 includes a fastening head 24,
Only the shaft portion 25 integrally protruding from the locking head 24 and the portion penetrating through the shaft portion 25 and the shaft center of the locking head 24 and corresponding to the insertion end 25a of the shaft portion 25. A screw hole 26 with an incompletely threaded portion 26a, a plurality of splits 1R27 provided on the insertion end 25a of the shaft portion 25, and a screw hole 26 screwed into the screw hole 26 from the locking head 24 side. It is equipped with 7 parts and 28 parts. The locking head 24 is a flange-shaped member having a larger diameter than the shaft portion 25, and is adapted to be attached to the outer surface of the disk 8b. The shaft portion 25 is cylindrical, and is inserted into a mounting hole 31 formed in the center of the bottle 9 through a shaft hole 29 formed in the center of the disc 8b. ing.

In addition, the incompletely threaded portion 26a of the screw hole 26 is connected to the shaft portion 2.
The thread groove becomes shallower gradually toward the insertion end of No. 5. Further, the split groove 27 is for facilitating radial deformation of the insertion end 25a of the shaft portion 25,
This is an axial groove that opens at the insertion end of the #1 portion 25.

Therefore, in order to fasten the disc 8b of the cylinder/hale 8 to the bottle 9 using this fastening tool 21, the shaft portion 25 is passed through the disc 8b and inserted into the mounting hole 31 of the bottle 9. After inserting the set screw 28 into the incompletely threaded portion 26a, the set screw 28 is threaded into the incompletely threaded portion 26a. The shaft portion 25 rests on the incompletely threaded portion 26a.
The diameter of the insertion end 25a is expanded. Therefore, this shaft portion 2
The insertion end 25a of 5 is pressed against the inner periphery of the mounting hole 31, and the shaft portion 25 is pressed against the inner periphery of the mounting hole 31.
It is fixed in place, unable to escape.

Therefore, with the fastener 21 having such a configuration, the shaft portion 25 is inserted into the predetermined mounting hole 31 and the set screw 2 is inserted.
Since the disk 8b can be fixed to the bottle 9 simply by screwing the screw 8, the fixing operation becomes extremely simple. In addition, the number of parts is small, and in particular, if the locking head 24 and the shaft part 25 are integrally formed, it can be constructed from only two parts, so manufacturing is easy.

In addition, the threading force of the set screw 28 is reduced to the incompletely threaded portion 26.
In a, the diameter expansion force is converted to the diameter expansion force of the tip of the shaft portion and the shaft portion 25 is bitten into the inner periphery of the mounting hole 31, so it is possible to obtain a strong fixing force, and the cylinder barrel 8
The disc 8b can be securely fixed to the bottle 9. That is, based on the relative rotation of the cylinder barrel 8 and the bottle 9 in the forward and reverse directions, 1.1: the dressing 21
Even if a rotational force is applied to it or some vibration is applied to it, the stuck state will not be easily released.

It goes without saying that the members to be hit are not limited to those in the above embodiments, and the present invention can be applied to mounting between various members.

Further, the shape of the locking head, the number of grooves, etc. are not limited to those described above, and various modifications can be made without departing from the spirit of the present invention.

[Effects of the Invention] Since the present invention has the above-described configuration, there is no inconvenience that the IF bonded state is released due to relative movement of the two fixed members or vibrations applied from the outside, and no shim adjustment is required. It is possible to provide an excellent fastening tool that has a simple structure and can perform the +h mounting operation efficiently.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the line ■-■ in FIG. FIG. 4 is an enlarged cross-sectional view showing essential parts in an exploded manner, FIG. 5 is a cross-sectional view taken along the line -V in FIG. 8b...First member (disc) 9φ...Second member (bintle) 21 Fist... Fixture 24... Locking head 25 - Shaft 26 +111 screw hole 26a・9 Incomplete threaded part 27...Split groove 28...Set screw 31 conflict...Mounting hole

Claims (1)

[Claims] A fastening tool for fastening a first member to a second member, the fastening tool having a fastening head attached to the surface of the first member, and a fastening device protruding from the fastening head, the first member being attached to the first member. Only a shaft portion that penetrates the member and is inserted into the mounting hole of the second member, and a portion that is provided at the shaft center of the shaft portion and the locking head and corresponds to the insertion end of the shaft portion. a screw hole having an incompletely threaded portion, a split groove provided at the insertion end of the shaft portion, and a set screw screwed into the screw hole portion from the locking head side, The shank is configured to be fixed in the mounting hole of the second member by threading the set screw into the incompletely threaded portion and expanding the diameter of the insertion end of the shank. outerwear.