JPH074331Y2 - Floating joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to an improvement of a floating joint that is connected between a driven body and a propulsion body to absorb tilt misalignment and parallel misalignment.

“Prior art” Conventionally, when a slide table or a slide base of a press, which is a driven body, is operated by a cylinder or the like that is a propelling body, it takes time for centering, processing accuracy adjustment, and assembly adjustment. I was having a hard time. Therefore, a floating joint that absorbs misalignment has been considered, and in a cylinder, for example, problems such as being unable to be pushed all the way to the stroke end, bending of the rod, and one-sided rod metal have been attempted to be solved.

Therefore, this conventional floating joint will be described with reference to FIGS. First, in one conventional example shown in FIG. 10, a sphere 101a
A stud 101 is formed by projecting a shaft portion 101b into the shaft portion 101b and providing a male thread stud side connection portion 101c on the shaft portion 101b. Then, the sphere 101a is held between two sliding rings 102, 102 having surfaces concentric with the center of the sphere 101a, and the rear surfaces 102a, 102a of the respective sliding rings 102, 102 are provided with a minute gap. Holding by the case 104 and the socket 105, the stud side connecting portion 101c of the male screw provided on the stud 101 is connected to the outer shell side connecting portion 103a of the female screw provided on the case 104. To swing the spherical surface and perform eccentric slide. Next, in another conventional example shown in FIG. 11, a spherical body 101a provided with a female screw
Is held by two sliding rings 102, 102 having surfaces concentric with the center of the sphere 101a, and each sliding ring 10
The back surface 102a, 102a of 2, 102 has a small gap and the case 10
Holds between 4 and socket 105. Then, in the stud 101 in which one side is provided with a male screw having a diameter smaller than the inner diameters of the sliding rings 102, 102 and the socket 105, and the other enlarged diameter shaft portion is provided with a stud side connection portion 101c of the female screw, Screw sphere 1
It is screwed onto the female screw of 01a and fixed with an adhesive. In addition,
In this case, the outer diameter of the stud-side connecting part 101c is 10
The diameter is much larger than the inner diameters of 2, 102 and the socket 105, and the stud-side connecting portion 101c of the female screw is provided up to the middle of the expanded diameter shaft portion. Then, the stud-side connecting portion 101c of the female screw performs spherical swing and eccentric slide with respect to the outer-shell-side connecting portion 103a of the male screw.

Then, in any of the conventional examples, the outer shell side connecting portion 10
The operated body 108 is attached via a nut to the male screw side of the 3a or the stud side connection portion 101c, and the propulsion body 109 is attached to the female screw side via a nut. Then, it absorbs tilt misalignment and parallel misalignment that occur between the propelling body 109 and the operated body 108.

"Problems to be solved by the invention" By the way, such a conventional floating joint had the following problems. Since the length is long, the equipment becomes longer and heavier than the case where it is not used, and it has not been possible to cope with the recent downsizing of the equipment. And, because of the long shape, the transmission of propulsive force becomes unstable, and the weight of the floating joint is concentrated on the tip of the cylinder rod. Especially when used horizontally, the rod metal is loaded and incomplete absorption of misalignment occurs. There were many cases.

This invention was created in view of the above circumstances.

"Means for Solving the Problems" Means for solving the above problems corresponding to the first embodiment
~ It demonstrates below using FIG.

The sphere 1a of the stud 1 in which the sphere 1a is attached to one end of the shaft portion 1b.
Is sandwiched between two sliding rings 2 and 2 each having a surface concentric with the center of the spherical body 1a, and the rear surface of each of the sliding rings 2 and 2 has a case 4 with a minute gap. A stud side connecting portion 1c provided on the shaft portion 1b is held by an outer shell portion 3 including a socket 5 and an outer shell portion connecting portion provided on the outer shell portion 3.
In a floating joint that oscillates spherically and eccentrically slides with respect to 3a, it has a shaft portion 1b that is integrally formed with the spherical body 1a and protrudes, and that has a diameter smaller than the inner diameter of the sliding ring 2 on the loose insertion side. In addition, while having a stud side tool hooking portion 1d for tightening and fixing on the outer diameter portion of the shaft portion 1b, a stud side connection portion 1c of a female screw provided from the end surface of the shaft portion 1b to the inside of the sphere 1a. It has stud 1.

As another aspect, the outer shell portion 3 is provided with an outer shell portion side connecting portion 3a integrally formed with the outer shell portion 3, such as a male screw or a plurality of through holes for mounting bolts.

"Operation" A propelling body 9 such as a cylinder is connected to one of the outer shell side connecting portion 3a and the stud side connecting portion 1c, and an operated body 8 such as a slide base is connected to the other. When there is a tilt misalignment or a parallel misalignment between the outer shell side connecting part 3a and the stud side connecting part 1c, the concentric pivot structure having the above-mentioned minute gap causes the sliding rings 2 and 2 to move. The spherical movement and the eccentric slide can be performed independently or in combination without changing the width between the back surfaces. In connecting the female screw provided inside the sphere 1a to the stud-side connecting portion 1c, a long male screw provided on the propulsion body 9 or the operated body 8 is intervened by a nut 10 for fixing. Therefore, the movement can be adjusted sufficiently in the longitudinal direction.
Further, the stud-side connecting portion 1c can be screwed up to the root of the above long male screw to shorten the distance between the propelling body 9 and the operated body 8 for use.

In addition, when the outer shell side connecting portion 3a integrally formed with the outer shell portion 3 such as a male screw or a plurality of mounting bolt through holes is used, a shorter floating joint can be obtained, There is no risk of loosening as in the case of a conventional separate assembly.

[Embodiment] The present invention will be described in more detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. 1 has a shaft portion 1b integrally formed with and protruding from a substantially spherical sphere 1a, and the shaft portion 1b
This is a stud in which a hole penetrating from the end face to the inside of the sphere 1a is provided, and a stud-side connecting portion 1c, which is a female screw, is provided halfway. The outer diameter of the spherical body 1a is larger than that of the shaft portion 1b.
Further, the shaft portion 1b is a sliding ring 2 on the loose insertion side of the shaft portion 1b during assembly.
The diameter of the stud is smaller than the inner diameter of the stud, and the outer diameter portion is provided with a stud-side tool hooking portion 1d such as two-way, four-way, or six-way. 2 is concentric with the sphere 1a and
A washer-shaped sliding ring having a surface for holding and sliding 1a. 4, the outer shell side connecting portion 3a of the male screw is provided at one end,
The case is provided with a flat bottom storage chamber 4a in which the back surfaces 2a of the sliding rings 2 and 2a slide at the other end. An outer shell side tool hooking portion 4b, such as a two-way, four-way, or six-way tool, is provided on the outer diameter portion. Further, the inner diameter of the storage chamber 4a is larger than the outer diameters of the sliding rings 2 and 2 by the eccentric slide amplitude. 5
Is a washer-shaped socket having a hole into which the shaft portion 1b of the stud 1 is loosely inserted and a surface on which the back surfaces 2a of the sliding rings 2 and 2a slide. The sphere 1a of the stud 1 is held between two opposing sliding rings 2 and 2, and the rear surfaces 2a and 2a of the sliding rings 2 and 2 are provided with a case 4 with a minute gap.
And hold it with the socket 5. The case 4 and the socket 5 have a similar shape depending on the combination method and it is difficult to separate them. Therefore, the case 4 and the socket 5 are combined to form the outer shell 3. And 6
Is a dust seal for dust prevention. Further, in order to further facilitate smooth sliding, the storage chamber 4a is filled with grease. 7
Is a locking pin for the case 4 and the socket 5.

Then, the operated body 8 such as the slide base is screwed into the outer shell side connecting portion 3a of the male screw, and the outer shell side tool hanging portion of the floating joint is screwed.
Hold 4b with a monkey, spanner, etc., and tighten it.
Further, the male screw of the propelling body 9 such as a cylinder or a press is screwed into the stud-side connecting portion 1c of the female screw, the longitudinal direction is adjusted, and the nut 10 is fixed. At this time, the stud-side tool hook 1d is held by a monkey, a spanner, etc., and the nut 10 is held by another monkey, a spanner, etc. and tightened and fixed.

The outer diameter of the sliding rings 2 and 2 is the storage chamber 4a of the case 4.
The sphere 1a concentrically held by the sliding rings 2 and 2 moves in parallel until it hits the inner diameter of the sliding rings 2 and 2.
Swing angle with respect to. Therefore, the propelling body 9 attached to the stud side connecting portion 1c and the actuated body 8 attached to the outer shell side connecting portion 3a can smoothly transmit power even if there is a parallel misalignment or an angular deviation.

FIG. 2 shows another embodiment of the present invention. In this embodiment, a male-screw outer shell side connection portion 3a is provided on the large-diameter outer diameter portion of the case 4 outside the storage chamber 4a. Other configurations are the same as those in the above embodiment. When used in the same manner as in the above embodiment, there is an effect that the distance between the propelling body 9 and the operated body 8 is extremely shortened.

3 to 4 show still another embodiment of the present invention. In this embodiment, the case 4 is in the shape of a rectangular block, and the outer shell side connecting portion 3a which is a plurality of through holes for mounting bolts is provided on the outer side of the storage chamber 4a of the case 4. Then, the operated body 8 is set on the side bottom surface of the case 4, and is fastened with the bolt 11 from the through hole for the mounting bolt. The outer shell side tool hook 4b of the above embodiment is not necessary in this embodiment. The other points are the same as those of the above-described embodiment, and when used in the same manner, there is an effect that the distance between the propulsion body 9 and the operated body 8 is drastically shortened as compared with the conventional foot type.

FIG. 5 shows still another embodiment of the present invention. In this embodiment, a case 4 having a rectangular block shape having a thick portion at the back of the storage chamber 4a is provided, and the thick shell portion has a plurality of through holes for mounting bolts, which are outer shell side connecting portions 3a. Is provided. Others
It is equivalent to the third to fourth embodiments, and if used in the same manner,
The effect is great for the narrow operated body 8.

FIG. 6 shows still another embodiment of the present invention. In this embodiment, a case 4 in which the outer wall at the back of the storage chamber 4a is laterally elongated like a plate is provided with a plurality of outer shell side connection portions 3a which are through holes for mounting bolts. Then, the operated body 8 is set on the plate-shaped back surface, and is fastened with the bolts 11 through the mounting bolt through holes. Others are the same as the above-mentioned embodiment, and when used in the same manner, the outer shell portion 3 can be directly formed into a shape called a flange shape and can be made thinner.

FIG. 7 shows still another embodiment of the present invention. In this embodiment, one end of the case 4 has a male screw outer shell side connecting portion.
3a is provided, and the length of the operated body 8 side can be adjusted by using a male screw longer than that of the first illustrated embodiment and interposing the adjusting nut 12. Others are the same as those in the first embodiment. It should be noted that this shape is a shape generally used in the past and called a basic shape, but the basic shape is much shorter than the conventional shape. FIG. 8 shows still another embodiment of the present invention. In this embodiment, the structure is the same as that of the first illustrated embodiment, but the outer shell side connecting portion 3a which is a male screw is provided with a propulsion body 9 having a female screw like a thin cylinder. The operated body 8 having a male screw is screwed to the stud-side connecting portion 1c which is a female screw. In this way, the propelling body 9 and the driven body 8 can be connected to either side of the stud side connecting portion 1c or the outer shell side connecting portion 3a.

FIG. 9 shows still another embodiment of the present invention. In this embodiment, the socket 5 portion of the sixth illustrated embodiment is integrated with the case 4 portion, and instead, the back wall portion of the storage chamber 4a is a separate disk-shaped socket 5. Others are the same as those of the embodiment shown in FIG. 6 and have similar effects. Like this
In any of the above embodiments, the case 4 and the socket 5
It suffices that the stud 1 and the sliding rings 2 and 2 be housed and held as the outer shell portion 3, and the split position is not specified.

In the above embodiment, the stud-side connection portion 1c, which is a female screw, can be a full-threaded female screw that does not penetrate the prepared hole that penetrates the inside of the sphere 1a from the shaft portion 1b. It can be a blind hole and a female screw up to the middle. When the stud-side connecting portion 1c is a female screw with a full thread in the penetrating hole, it is possible to accommodate a longer male screw of the propulsion body 9 or the driven body 8 and to obtain a longer adjustment allowance. effective. Also, in the case of a female screw up to the middle, the male screw of the propelling body 9 or the operated body 8 can be screwed until it abuts against the inside of the screw. There is no hassle of having to use it by returning it about 1 turn. In addition, there is an effect that a malfunction due to forgetting to return does not occur.

Further, since the shaft portion 1b of the stud 1 has a smaller diameter than the inner diameter of the sliding ring 2 only on the shaft portion 1b side, the other sliding ring 2 on the side facing the shaft portion 1b side is , The inner diameter is the shaft
The diameter does not necessarily have to be larger than 1b. However, usually two pieces are used in the same shape.

Further, the pin 7 may be any one that fixes the socket 5 and the case 4 with a set screw, a spring pin, a shaft, or the like. Further, the threaded portion between the socket 5 and the case 4 may be fixed with an adhesive.

Also, the outer shell side tool hook 4b and the stud side tool hook 1d
Is a two-sided shape, a four-sided shape, a six-sided shape, or the like.

"Effect of device" The advantages of the device are as follows. By using the female threaded stud-side connecting portion 1c extending from the end surface of the shaft portion 1b of the stud 1 to the inside of the sphere 1a, the floating joint is dramatically shortened compared to various conventional floating joints. It was Further, in the conventional example shown in FIG. 10, the case 104 is provided with the outer shell portion side connection portion 103a of the female screw, but if the length of the female screw is increased, the total length of the floating joint is increased. ing. However, propellants such as cylinders 109
In many cases, the male screw at the tip of the rod is often long, and even if the male screw is screwed into the outer shell side connecting portion 103a, the male screw leaves the rod root portion 109a at the rear portion of the nut 110 for a long time, and thus the floating property Even if the joint looked short, it could not be shortened in the connected state.
However, in the floating joint of the present invention, since the stud-side connecting portion 1c, which is a female screw, is provided long inside the sphere 1a, it is screwed to the rod root of the long rod end male screw of the cylinder. , In addition to the effect of basically a short floating joint, there was an unprecedented effect such as further shortening in the connected state. Then, in another conventional example shown in FIG. 11, a shaft portion 101b separate from the spherical body 101a and having a large diameter is used.
Since the stud 101 is screwed on, it takes a lot of time to assemble it, and loosening of the screwed portion easily occurs.
101a may be small in diameter and weak, and furthermore, since the stud side connection part 101c of the female screw is provided only up to the middle of the stud 101, if the stud side connection part 101c is lengthened, the floating joint becomes longer. However, in the floating joint of the present invention, since the stud 1 is integrally molded with the spherical body 1c, it is easy to assemble, does not loosen, and has high strength. There is an effect that the parts are screwed together.

Further, due to the shortened floating joint, the distance between the operated body 8 and the propulsion body 9 is shortened, which is useful for downsizing the device. In addition, the weight of the floating joint is not concentrated on the tip of the cylinder rod and a load is applied to the rod metal, and the transmission of propulsive force is stabilized.

Further, by providing the outer shell side connection portion 3a, which is a male screw or a plurality of through holes for bolting, etc., which is directly formed integrally with the case 4 or the socket 5, the floating joint is further shortened, and The integrated structure has the effect of increasing strength.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing another embodiment of the present invention, and FIG. 3 is a plane sectional view showing yet another embodiment of the present invention. FIG. 4 is a front view showing the same embodiment of the present invention, FIGS. 5 to 9 are sectional views showing still another embodiment of the present invention, and FIGS. 10 to 11 are conventional floating joints. FIG. 1 ... Stud, 1a ... Sphere, 1b ... Shaft part, 1c ... Stud side connection part, 1d ... Stud side tool hook part, 2 ... Sliding ring, 2a ...
Back surface, 3 ... Outer shell, 3a ... Outer shell side connection, 4 ... Case,
4a ... accommodation chamber, 4b ... outer shell side tool hook, 5 ... socket, 6
... Dust seal, 7 ... Pin, 8 ... Operated body, 9 ... Propulsion body, 10 ... Nut, 11 ... Bolt.

Claims (2)

[Scope of utility model registration request] 1. A stud (1) having a sphere (1a) attached to one end of a shaft (1b), the sphere (1a) having two surfaces having a surface concentric with the center of the sphere (1a). Sliding ring (2),
The outer shell part (3), which is held by (2) and has a small gap on the back surface of each of the sliding rings (2) and (2), is composed of a case (4) and a socket (5). Hold the shaft (1b)
The stud side connection part (1c) provided on the outer shell part (3)
A spherical joint (1a) in a floating joint that performs spherical swing and eccentric slide with respect to the outer shell side connecting portion (3a) provided in
Slide ring (2) on the loose insertion side while protruding integrally with
Has a shaft portion (1b) having a diameter smaller than the inner diameter of the shaft portion, and has a stud-side tool hooking portion (1d) for fitting and fixing on the outer diameter portion of the shaft portion (1b), and the shaft portion (1b). A floating joint comprising a stud (1) having a female threaded stud-side connecting portion (1c) provided from an end surface to the inside of the sphere (1a). 2. The outer shell part (3) is provided with an outer shell part side connecting part (3a) integrally formed with the outer shell part (3), such as a male screw or a plurality of through holes for mounting bolts. The floating joint according to claim 1, wherein