JP2022112617A - Fitting structure of positioning pin of eye joint metal fitting - Google Patents

Abstract

To provide a fitting structure of a positioning pin of an eye joint metal fitting which can omit processing work of a fitting hole for a different union bolt insertion part per specification of an apparatus, and has an advantage in improving efficiency of a fitting operation of the eye joint metal fitting.SOLUTION: A fitting structure of a positioning pin 28A is given in which the same is arranged in a union bolt insertion part 12 of an eye joint metal fitting 10 and inserted into a positioning hole 2420 arranged on an attachment surface 2402 in an apparatus 24. A recessed groove 1210 is arranged extending in a circumferential direction of an outer peripheral surface 1201 of the union bolt insertion part 12. The positioning pin 28A includes: an insertion part 30 which is inserted into the positioning hole 2420; and an attachment part 32 which is connected with the insertion part 30 and extended in a length shorter than an extension length of the recessed groove 1210. The attachment part 32 is attached to the recessed groove 1210 by brazing or press-fit.SELECTED DRAWING: Figure 2

Description

The present invention relates to a mounting structure for a positioning pin of an eye joint fitting.

2. Description of the Related Art There is known an eye joint fitting used when connecting a hose for fluid circulation to a device or device (see Patent Document 1).
Such an eye joint fitting is used, for example, when connecting a hydraulic hose to equipment in a power steering system of an automobile.
The eye joint fitting includes a union bolt insertion portion and a hose connection portion projecting from the union bolt insertion portion, and the end of a hydraulic hose is attached to the hose connection portion.
The eye joint fitting is attached to the attachment surface by screwing the female thread of the union bolt inserted through the union bolt insertion portion into the female thread of the attachment surface on the device side.
At this time, if the eye joint metal fitting rotates around the union bolt and the union bolt due to the tightening of the union bolt, the position of the hydraulic hose connected to the hose connection part will deviate from the predetermined position. put away.
Therefore, a positioning hole is provided in the mounting surface of the device, and a positioning pin that is inserted into the positioning hole is protruded from the eye joint fitting. It is designed to prevent co-rotation of the eye joint fitting with the union bolt.
Conventionally, the positioning pin has an L shape, one end of the positioning pin is inserted into a positioning hole provided in the mounting surface of the device, and the other end of the positioning pin is provided in the union bolt insertion portion. It is inserted into the mounting hole and brazed.

JP-A-2003-56705

On the other hand, since the position of the mounting hole provided in the union bolt insertion part differs depending on the specifications of the equipment, the mounting holes must be formed in different locations of the union bolt insertion part for each equipment specification, which is time-consuming. It was a work, and it was disadvantageous in terms of improving the efficiency of the work of attaching the eye joint metal fittings.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to omit the work of machining mounting holes in different positions of the union bolt insertion portion, which is performed for each device specification, and to provide an eye joint metal fitting. To provide a mounting structure for a positioning pin of an eye joint metal fitting which is advantageous in improving the efficiency of the mounting work of an eye joint.

In order to achieve the above object, one embodiment of the present invention is a mounting structure for a positioning pin that is provided in a union bolt insertion portion of an eye joint fitting and is inserted into a positioning hole provided in the mounting surface on the device side. A concave groove extending in the circumferential direction is provided on the outer peripheral surface of the union bolt insertion portion, and the positioning pin includes an insertion portion inserted into the positioning hole and the concave groove connected to the insertion portion. and an attachment part that extends in a length shorter than the extension length of the groove and is attached to the groove.
Moreover, one embodiment of the present invention is characterized in that the mounting portion is brazed to the concave groove.
Moreover, one embodiment of the present invention is characterized in that the mounting portion is press-fitted into the concave groove.

According to one embodiment of the present invention, when the position of the positioning pin in the circumferential direction of the outer peripheral surface of the union bolt insertion portion must be changed depending on the specifications of the equipment, the mounting portion is removed before mounting the mounting portion in the concave groove. It can be moved in the circumferential direction to adjust and change the position of the positioning pin.
Therefore, it is possible to omit the time-consuming work of forming mounting holes at different positions of the union bolt insertion portion for each device specification, which is advantageous in improving the efficiency of the work for mounting the eye joint fitting.
According to one embodiment of the present invention, the attachment of the attachment portion to the groove may be performed by brazing or by press fitting.

1 is a perspective view of an eye joint fitting to which the mounting structure of a positioning pin for an eye joint fitting according to the first embodiment is applied; FIG. 1A is a perspective view of a mounting structure of a positioning pin for an eye joint fitting according to a first embodiment, FIG. It shows the state in which it is tightened on the equipment side. FIG. 4 is a partial cross-sectional view showing a state in which the eye joint fitting is fastened to the mounting surface on the device side via a union bolt; Explanatory diagrams of the positioning pin according to the first embodiment, (A) is a plan view, (B) is a front view of the same, (C) is a side view of the same, (D) is a bottom view of the same, (E) is a (A) is a cross-sectional view along the EE line, and (F) is a cross-sectional view along the FF line of (C). Explanatory diagrams of the positioning pin according to the second embodiment, (A) is a plan view, (B) is a front view of the same, (C) is a side view of the same, (D) is a bottom view of the same, (E) is a (A) is a cross-sectional view along the EE line, and (F) is a cross-sectional view along the FF line of (C). FIG. 10 is a perspective view of a mounting structure of a positioning pin for an eye joint fitting according to a second embodiment, where (A) shows the state before the eye joint fitting is installed on the device side, and (B) shows the eye joint fitting positioning the eye joint fitting. It shows the state in which it is tightened on the equipment side. FIG. 11 is a partial cross-sectional view showing a state in which the mounting portion of the positioning pin is press-fitted into the groove portion of the union bolt insertion portion of the eye joint fitting in the second embodiment; FIG. 10 is a partial cross-sectional view showing a state in which the attachment portion of the positioning pin is press-fitted into the groove portion of the union bolt insertion portion of the eye joint fitting in the first modified example of the second embodiment; FIG. 11 is a partial cross-sectional view showing a state in which the attachment portion of the positioning pin is press-fitted into the groove portion of the union bolt insertion portion of the eye joint fitting in the second modification of the second embodiment;

(First embodiment)
Next, embodiments of the present invention will be described with reference to the drawings.
First, the eye joint fitting will be described.
The eye joint fitting 10 is made of metal, and includes a union bolt insertion portion 12 and a hose connecting portion 14 as shown in FIGS.
As shown in FIG. 3, the union bolt insertion portion 12 has a cylindrical peripheral wall portion 1202, and the inner side of the peripheral wall portion 1202 serves as a union bolt insertion hole 1204 that penetrates the peripheral wall portion 1202. An annular recess 1206 is provided radially outwardly of the union bolt insertion hole 1204 and extends over the entire circumference of the inner peripheral surface of the hole 1204 at the central portion of the hole 1204 in the axial direction.

As shown in FIG. 1, the hose connector 14 includes a tubular body 1402 .
Tubular body 1402 includes a base portion 1402A projecting linearly outward from peripheral wall portion 1202 in the radial direction of peripheral wall portion 1202, and an end portion of base portion 1402A connected to an end portion of base portion 1402A via a bent portion. It has an incline portion 1402B that is displaced in the center direction.
The end of base 1402A opens into annular recess 1206, as shown in FIG.
The inclined portion 1402B is where the hose 16 is attached.
The end of the hose 16 may be inserted into the ramp 1402B and the end of the hose 16 may be coupled onto the ramp 1402B with a hose band or clamp, or the ramp 1402B may be provided with a nipple and socket and the socket It is optional, such as connecting to the inclined portion 1402B by crimping.

As shown in FIGS. 2A and 3, the union bolt 18 has a head portion 20 and a shaft portion 22. As shown in FIG.
The head 20 has, for example, a hexagonal cross-section on which a spanner is hooked.
The shaft portion 22 is coaxial with the head portion 20 and protrudes from one end of the head portion 20 .
An axial flow passage 2202 is formed in the center of the shaft portion 22 to extend along the axis of the shaft portion 22 , and the end portion of the axial flow passage 2202 located on the opposite side of the head portion 20 is the shaft portion 22 . is open at the end face of the
Radial flow passages 2204 are formed on both sides of the shaft portion 22 in the radial direction at a location near the head portion 20 of the shaft portion 22 .
A male thread 2210 that is screwed into a female thread 2410 of the device 24 is formed on the remaining portion of the shaft portion 22 excluding the portion near the head portion 20 .

A female thread 2410 into which the male thread 2210 of the union bolt 18 is screwed is formed on the mounting surface 2402 of the device 24 , and a channel 2404 on the side of the device 24 is provided in communication with the female thread 2410 .
As shown in FIGS. 2 and 3, the eye joint fitting 10 is mounted on the device 24 by screwing the male thread 2210 of the union bolt 18 inserted through the union bolt insertion portion 12 into the female thread 2410 of the mounting surface 2402 on the device 24 side. mounted on the side.
In this way, the eye joint fitting 10 has the washer 26 between the mounting surface 2402 of the device 24 and the lower surface of the peripheral wall portion 1202 and between the lower surface of the head 20 of the union bolt 18 and the upper surface of the peripheral wall portion 1202. In this state, the union bolt 18 is inserted through the washer 26 and the union bolt insertion hole 1204 , and the male thread 2210 of the union bolt 18 is screwed into the female thread 2410 of the mounting surface 2402 , so that the eye joint fitting 10 is attached to the mounting surface 2402 . can be attached to
With the eye joint fitting 10 attached to the attachment surface 2402 in this way, the inside of the hose 16 and the flow path 2404 on the side of the device 24 communicating with the internal thread 2410 are formed by the tubular body 1402, the annular recess 1206, and the radial flow path. Channel 2204 communicates with axial channel 2202 .
Fluid flows from the device 24 to the hose 16 or from the hose 16 to the device 24 according to the operation of the device 24 .

Next, the mounting structure of the positioning pin of the eye joint fitting according to this embodiment will be described.
As shown in FIG. 1 , a concave groove 1210 extending in the circumferential direction of the outer peripheral surface 1201 is provided in the outer peripheral surface 1201 at the intermediate portion of the union bolt insertion portion 12 in the axial direction. The cross-sectional shape of the recessed groove 1210 may be rectangular or semicircular, but is rectangular in this embodiment.
The length of extension of concave groove 1210 is set to 1/2 or more of the outer circumference of outer peripheral surface 1201, and in the present embodiment, it extends over the entire circumference of outer peripheral surface 1201 excluding the periphery of tubular body 1402. is doing.
The groove 1210 has a bottom surface 1212 facing radially outward of the outer peripheral surface 1201 .
The positioning pin 28A is made of metal and has an insertion portion 30 and a mounting portion 32 as shown in FIG.
The insertion portion 30 is positioned by being inserted into a positioning hole 2420 (see FIG. 2) formed in the mounting surface 2402 of the device 24. Since the positioning hole 2420 is circular, the insertion portion 30 also has a circular cross section. It is formed with and extends in a straight line.
A connecting portion 31 extending linearly through a bent portion is provided at one end of the inserting portion 30, and the connecting portion 31 and the inserting portion 30 are formed of the same member having a circular cross section.

The attachment portion 32 is provided at the tip of the connection portion 31 .
The mounting portion 32 has a rectangular cross section corresponding to the groove 1210 , and has a cross-sectional shape large enough to be inserted into and removed from the groove 1210 , and extends in an arc shape along the extending direction of the groove 1210 . , the length of which is shorter than the extension length of the groove 1210 .
In this embodiment, the attachment portion 32 is provided with a length of about 1/4 of the outer circumference of the outer peripheral surface 1201 of the union bolt insertion portion 12 .
The mounting portion 32 has an inner peripheral surface 3202 located radially inward.
The positioning pin 28A positions the outer peripheral surface 1201 of the union bolt insertion portion 12 in the circumferential direction in a state where the mounting portion 32 is inserted into the groove 1210 and the inner peripheral surface 3202 is in contact with the bottom surface 1212 of the groove 1210. In this state, the attachment portion 32 is attached to the groove 1210 by brazing.
The positioning pin 28A is attached to the union bolt insertion portion 12 in this manner, and the insertion portion 30 is inserted into the positioning hole 2420 as shown in FIGS. The joint fitting 10 is attached to the attachment surface 2402 on the device 24 side.

Therefore, according to the present embodiment, the groove 1210 extending in the circumferential direction of the outer peripheral surface 1201 is formed in advance in the outer peripheral surface 1201 of the union bolt insertion portion 12, and the mounting portion 32 is formed in the groove 1210. After inserting and positioning the positioning pin 28A in the circumferential direction of the outer peripheral surface 1201 of the union bolt insertion portion 12, the attachment portion 32 can be attached to the groove 1210 by brazing.
Therefore, if the position of the positioning pin 28A in the circumferential direction of the outer peripheral surface 1201 of the union bolt insertion portion 12 must be changed depending on the specifications of the device 24, the mounting portion 32 is moved in the circumferential direction within the groove 1210 before brazing. , and the position of the positioning pin 28A can be adjusted and changed within the groove 1210. As shown in FIG.
Therefore, it is possible to omit the conventional time-consuming work of forming mounting holes in different locations of the union bolt insertion portion 12 for each specification of the device 24, and to improve the efficiency of the mounting work of the eye joint fitting 10. is advantageous.
In this case, the position of the positioning pin 28A can be adjusted and changed within the groove 1210 as the mounting portion 32 can move within the groove 1210 along the circumferential direction of the outer peripheral surface 1201 of the union bolt insertion portion 12. the possible range is increased.
For example, the extension length of the groove 1210 is set to 1/2 of the outer circumference of the outer peripheral surface 1201 of the union bolt insertion portion 12, and the extension length of the mounting portion 32 is set to 1/2 of the outer circumference of the outer peripheral surface 1201. If the length is /4, the mounting position of the positioning pin 28A in the circumferential direction of the outer peripheral surface 1201 of the union bolt insertion portion 12 can be adjusted within an angle range of ±45 degrees around the axis of the union bolt insertion portion 12. Become.

(Second embodiment)
Next, a mounting structure of the positioning pin of the eye joint fitting according to the second embodiment will be described with reference to FIGS. 5 to 7. FIG.
It should be noted that in the following embodiment, the same portions as those in the first embodiment, and the same reference numerals are given to the members, and the different portions will be mainly described.
In the second embodiment, the process of attaching the mounting portion 32 to the groove 1210 is different. In the second embodiment, the attachment portion 32 is attached to the concave groove 1210 by press fitting.
Also in the second embodiment, as shown in FIG. 1, a groove 1210 is provided on the outer peripheral surface 1201 at the intermediate portion of the union bolt insertion portion 12 in the axial direction, and the groove 1210 extends around the tubular body 1402. It extends over the entire circumference of the outer peripheral surface 1201 excluding it.
As shown in FIG. 5, the positioning pin 28B has an insertion portion 30, a connection portion 31, and an attachment portion 32. As shown in FIG.
The insertion portion 30 and the attachment portion 32 are the same as those in the first embodiment, and the structure of the attachment portion 32 provided at the tip of the connection portion 31 is different from that in the first embodiment.

The mounting portion 32 has a rectangular cross-sectional shape that is sized to be press-fitted into the groove 1210 and extends in an arc shape along the extending direction of the groove 1210 , and has a length shorter than the extension length of the groove 1210 . In the present embodiment, the attachment portion 32 is provided with a length of about 1/2 of the outer circumference of the outer peripheral surface 1201 of the union bolt insertion portion 12 .
The mounting portion 32 has an inner peripheral surface 3202 located radially inward.
As shown in FIG. 7, the mounting portion 32 is press-fitted into the groove 1210 while the positioning pin 28B is positioned in the circumferential direction of the outer peripheral surface 1201 of the union bolt insertion portion 12. 3202 contacts the bottom surface 1212 of the groove 1210 .
The same effects as those of the first embodiment can be obtained by such a second embodiment.
In the second embodiment, the groove 1210 extends over the entire circumference of the outer peripheral surface 1201 excluding the circumference of the tubular body 1402, and the mounting portion 32 is half the length of the outer circumference of the outer peripheral surface 1201. The mounting position of the positioning pin 28B in the circumferential direction of the outer peripheral surface 1201 of the union bolt insertion portion 12 can be adjusted within an angular range of ±50 degrees around the axis of the union bolt insertion portion 12 .

Next, referring to FIGS. 8 and 9, the mounting structure of the positioning pin of the eye joint fitting of the first and second modifications of the second embodiment will be described.
In a first modified example shown in FIG. 8, the cross-sectional shape of a groove 1210 is different from that of the second embodiment.
The groove 1210 of the first modified example is composed of a bottom surface 1212 and a pair of side surfaces 1214 standing from both sides of the bottom surface 1212. The pair of side surfaces 1214 are inclined surfaces that displace toward each other as they move away from the bottom surface 1212. formed.
In FIG. 8, the inclination of the inclined surface is exaggerated for easy understanding.
The same effect as the second embodiment can be obtained by such a first modification, and furthermore, according to the first modification, when the mounting portion 32 is press-fitted into the recessed groove 1210, the second embodiment can be achieved. As compared with the form of (1), there is an effect that the mounting portion 32 is more difficult to come off from the recessed groove 1210 .

In a second modified example shown in FIG. 9, in addition to the first modified example, a locking concave portion 3212 is provided in the mounting portion 32 .
The locking recess 3212 is formed on both sides 3210 in the thickness direction of the mounting portion 32 where the outer peripheral surface 1201 of the union bolt insertion portion 12 is positioned while the inner peripheral surface 3202 of the mounting portion 32 is in contact with the bottom surface 1212 of the recessed groove 1210 . is provided in
The locking recesses 3212 extend in an arc shape along the outer peripheral surface 1201 of the union bolt insertion portion 12 on both sides 3210 in the thickness direction of the mounting portion 32 .
In the second modification, both surfaces 3210 in the thickness direction of the mounting portion 32 are engaged with the inner peripheral surface 3202 of the mounting portion 32 in contact with the bottom surface 1212 of the groove 1210 and the mounting portion 32 is press-fitted into the groove 1210 . Since the edge where the outer peripheral surface 1201 of the union bolt insertion portion 12 and the pair of side surfaces 1214 of the groove 1210 intersect bites into the stop recess 3212, when the mounting portion 32 is press-fitted into the groove 1210, the first modified example This also has the effect of making it more difficult for the mounting portion 32 to come off from the recessed groove 1210 .

10 Eye joint fitting 12 Union bolt insertion portion 1201 Peripheral surface 1202 Peripheral wall portion 1204 Union bolt insertion hole 1206 Annular concave portion 1210 Groove 1212 Bottom surface 1214 Pair of side surfaces 14 Hose connecting portion 1402 Pipe body 1402A Base portion 1402B Inclined portion 16 Hose 18 Union bolt 20 Head 22 Shaft 2202 Axial channel 2204 Radial channel 2210 External thread 24 Equipment 2402 Mounting surface 2404 Channel 2410 Internal thread 2420 Positioning hole 26 Washers 28A, 28B Positioning pin 30 Insertion portion 31 Connecting portion 32 Mounting portion 3202 Inner peripheral surface 3210 both sides in the thickness direction 3212 locking recess

Claims (3)

A mounting structure for a positioning pin provided in a union bolt insertion portion of an eye joint fitting and inserted into a positioning hole provided in a mounting surface on the device side,
A concave groove extending in the circumferential direction is provided on the outer peripheral surface of the union bolt insertion portion,
The positioning pin includes an insertion portion that is inserted into the positioning hole, and an attachment portion that is connected to the insertion portion and extends in a length shorter than the extended length of the groove and is attached to the groove. there is
A mounting structure for a positioning pin of an eye joint metal fitting, characterized by: The mounting portion is brazed into the groove,
2. The mounting structure of the positioning pin of the eye joint fitting according to claim 1, wherein: The mounting portion is press-fitted into the groove,
2. The mounting structure of the positioning pin of the eye joint fitting according to claim 1, wherein:

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