JP2007092773A - Assembling structure for eye coupling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembling structure for an eye coupling preventing a drop of a packing 20 during conveyance and assembling work and having excellent efficiency of assembling work. <P>SOLUTION: This assembling structure for the eye coupling is provided with a joint body 12 having an eyeball part 16, the packing 20 fitted to the eyeball part 16 and a bolt 30 fastened on a mating component Pt by penetrating through a bolt hole 18. A extension part 24b extended from an inner peripheral edge of a through-hole 24a along the inner peripheral wall of the bolt hole 18 is formed in a lower seal part 24 of the packing 20. On the inner peripheral wall of the extension part 24b, a female screw 24c into which a male screw 34 is screwed is formed. By screwing the male screw 34 of the bolt 30 into the female screw 24c, the packing 20 is strongly fitted to the joint body 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an eyeball joint assembly structure used for connecting a hydraulic hose or the like of a brake system in an automobile.

  Conventionally, as an assembly structure of this type of eyeball joint, a joint body having a eyeball part, a packing attached to the eyeball part, and a bolt fastened to a mating part by penetrating a bolt hole in the eyeball part are provided. ing. As an assembly structure of such an eyeball joint, a structure in which a packing that also serves to prevent damage to the sealing surface during transportation is attached to the eyeball portion with a bolt is known (Patent Documents 1 and 2). That is, the technique of Patent Document 1 uses a packing provided with an upper seal portion, a lower seal portion, and a connection portion that connects the upper seal portion and the lower seal portion, and projects from the eyeball portion at the connection portion. It is the structure which unifies an eyeball part and packing by engaging with an engaging protrusion. Moreover, the technique of patent document 2 is the structure which hooked the packing to the volt | bolt by providing the drop-off prevention protrusion engaged with the male screw of a volt | bolt in the lower seal part while connecting an upper seal part and a lower seal part. .

  However, in the technique of Patent Document 1, the structure of the coupling part of the packing and the structure of the engagement protrusion of the eyeball part are complicated, and it is necessary to prepare a cap or the like separately to temporarily fix the bolt. There is a problem that the score increases. Further, in the technique of Patent Document 2, there is a problem that the engagement force between the drop-off preventing protrusion and the male screw of the bolt is small, and the packing is easily dropped during the transport of the assembly structure of the eyeball joint.

JP-A-7-77294 JP 2003-56705 A

  The present invention provides an eyeball joint structure that has a simple structure, prevents the packing from dropping off during conveyance, and is excellent in assembling workability, in light of solving the above-described problems of the conventional techniques. With the goal.

The present invention made to solve the above problems
A joint body having an eyeball portion having an upper seal surface and a lower seal surface, and a bolt hole facing the upper seal surface and the lower seal surface and penetratingly formed in the eyeball portion;
The bolt hole is sealed to the outside by being in close contact with the upper seal surface, and the bolt hole is sealed to the outside by being in close contact with the lower seal surface and the through hole is to be sealed. A packing having a lower seal part and a connecting part for connecting the upper seal part and the lower seal part;
It has a bolt head and a male screw, passes through the through hole of the upper seal portion, the bolt hole and the through hole of the lower seal portion, and presses the upper seal portion against the upper seal surface with the bolt head. And a bolt through which the male screw penetrates the through hole of the lower seal part,
With
The lower seal portion includes an extending portion that extends from the inner peripheral edge of the through hole along the inner peripheral wall of the bolt hole, and the inner wall of the extending portion is a female screw that is screwed into the male screw. It is characterized by having.

The eyeball joint assembly structure according to the present invention includes a bolt inserted into a through hole and a bolt hole of the upper seal portion, a male screw is screwed into the female screw of the extension portion, and a bolt is inserted from the through hole of the lower seal portion. Make the tip protrude. In such an assembled state, the assembly structure of the eyeball joint is conveyed. The packing assembled to the joint body is integrally and firmly assembled to the joint body by screwing the male screw of the bolt into the female thread of the extension part of the lower seal part. It will not drop out during work in the process.
Further, since the assembly structure of the eyeball joint has the packing integrally assembled to the joint main body, it is not necessary to assemble the packing or insert the bolt at the time of assembling the vehicle, and the work process can be simplified.
Furthermore, since the female screw of the packing is screwed into the male screw in the same shape as the male screw of the bolt, there is no hindrance to the bolt fastening operation during vehicle assembly.

  As a preferred aspect of the present invention, the female screw can be formed by screwing the same shape tool into the male screw or the male screw and plastically deforming it. That is, in addition to using a drill as a female thread processing means, a male screw may be simultaneously formed on the inner wall of the extended portion with a male screw at the same time as a bolt is screwed in temporarily fixing, thereby processing This process is not required and the process can be simplified.

  As another preferred embodiment, the joint body has an oil passage connected to a brake hose, and a part of the oil passage is formed by an outer peripheral portion of the bolt, an inner peripheral wall of the bolt hole, and an extending portion. It can be constituted by a gap surrounded by the end. With this configuration, the oil passage is formed using the gap of the thickness of the extending portion, and it is not necessary to cut the inner peripheral wall of the bolt hole in order to form the oil passage, and the processing cost can be reduced.

  In order to further clarify the configuration and operation of the present invention described above, preferred embodiments of the present invention will be described below.

(1) Configuration of an eyeball joint assembly structure FIG. 1 is a cross-sectional view showing an eyeball joint assembly structure according to an embodiment of the present invention. The assembly structure of the eyeball joint is used for a brake system of an automobile, that is, used to connect a brake hose BH and a counterpart part Pt such as a caliper. The eyeball joint assembly structure includes a joint body 12, a bolt 30, and a packing 20.

  The joint body 12 includes a hose connection portion 14 for connecting the brake hose BH. The hose connection portion 14 includes a bottomed cylindrical socket 14a and a nipple 14b disposed therein. The end portion of the brake hose BH is inserted between the socket 14a and the nipple 14b, and the brake hose BH is connected to the hose connection portion 14 by caulking the socket 14a. The nipple 14b is disposed along the axis of the hose connection portion 14 and includes an oil passage 14c connected to the brake hose BH.

  FIG. 2 is an enlarged cross-sectional view showing a main part of FIG. The joint body 12 includes an eyeball portion 16 that is formed integrally with the hose connection portion 14 and a flange portion 17 that protrudes from the side wall of the eyeball portion 16 and stops by rotating into the engagement hole Ptb of the mating part Pt. I have. The upper and lower surfaces of the eyeball portion 16 are an upper seal surface 16a and a lower seal surface 16b, and a bolt hole 18 is formed so as to penetrate the upper seal surface 16a and the lower seal surface 16b. The bolt hole 18 is connected to the oil passage 14c.

FIG. 3 is a perspective view showing the packing 20. 2 and 3, the packing 20 includes a disk-like upper seal portion 22 and a lower seal portion 24, and a connecting portion 26 that connects the upper seal portion 22 and the lower seal portion 24. Forming. The upper seal portion 22 seals the upper seal surface 16a of the eyeball portion 16, and has a through hole 22a for allowing the bolt 30 to pass therethrough. The lower seal portion 24 seals the lower seal surface 16 b of the eyeball portion 16 and has a through hole 24 a for allowing the bolt 30 to pass therethrough. The connecting portion 26 is formed of a thin plate that connects the outer peripheral ends of the upper seal portion 22 and the lower seal portion 24, and is arranged so as to go around the side wall of the bolt hole 18.
The lower seal portion 24 is formed with an extending portion 24b. The extending portion 24b extends in a cylindrical shape from the inner peripheral edge of the through hole 24a so as to follow the inner peripheral wall of the bolt hole 18. On the inner wall of the extending portion 24b, a female screw 24c that is screwed into the male screw 34 of the bolt 30 is formed.
The packing 20 can usually be manufactured by punching from a sheet metal of a soft metal (for example, copper) and then by bending or plastic working described later.

  In FIG. 2, the bolt 30 passes through the through hole 22a of the upper seal portion 22, the bolt hole 18 and the through hole 24a of the lower seal portion 24, and is screwed into the female screw 24c of the packing 20 and the screw of the counterpart component Pt. The joint body 12 is fixed to the mating part Pt by being screwed into the groove Pta. In the tightened state by the bolt 30, the bolt head 32 presses the upper seal portion 22 against the upper seal surface 16a, and the lower seal surface 16b presses the lower seal portion 24 against the mating part Pt. Sealed against the outside.

  The bolt 30 is formed with an oil passage 36 that passes through the axis. An oil passage 18a is formed in a gap surrounded by the outer peripheral portion of the bolt 30, the inner peripheral wall of the bolt hole 18 and the upper end portion of the extending portion 24b. By such an oil passage, the brake oil flowing in the brake hose BH is guided to the oil passage of the counterpart part Pt (brake caliper) through the oil passage 14c, the oil passage 18a, and the oil passage 36 of the bolt hole 18, or vice versa. Is led from the counterpart part Pt to the brake hose BH.

(2) Assembly work Next, the assembly process of the assembly structure of the eyeball joint will be described. FIG. 4 is an explanatory view illustrating an assembly process of the assembly structure of the eyeball joint. As shown in FIG. 4 (A), the end of the brake hose BH is inserted into the gap between the socket 14a and the nipple 14b of the hose connection portion 14, and the outer periphery of the socket 14a is caulked so that the brake hose BH is hose. It fixes to the connection part 14. FIG. Next, as shown in FIG. 4B, the packing 20 is attached to the eyeball portion 16. At this time, the upper seal portion 22 is aligned with the upper seal surface 16a, and the lower seal portion 24 is aligned with the lower seal surface 16b. Subsequently, as illustrated in FIG. 4C, the extending portion 24 b is formed in the lower seal portion 24 of the packing 20. That is, the extended portion 24b is formed by bending the peripheral edge portion of the through hole 24a of the lower seal portion 24 into the bolt hole 18 by press working. And as shown in FIG.4 (D), the internal thread 24c is formed in the inner wall of the extension part 24b. That is, as shown in FIG. 5, the female screw 24 c is formed on the inner wall of the extending portion 24 b by the drill Dr having the same shape as the male screw 34 of the bolt 30. Then, as shown in FIG. 6, the bolt 30 is inserted into the through hole 22 a and the bolt hole 18 of the upper seal portion 22, the male screw 34 is screwed into the female screw 24 c of the extension portion 24 b, and the lower seal portion 24 The tip of the bolt 30 is projected from the through hole 24a. Thereby, the assembly structure of the eyeball joint in the temporarily assembled state for conveyance shown in FIG. 7 is obtained.

  Then, in the vehicle assembly process, as shown in FIG. 1, the flange portion 17 of the eyeball portion 16 is inserted into the engagement hole Ptb, the tip end portion of the bolt 30 is aligned with the screw groove Pta, and the bolt 30 is screwed. The eyeball joint is assembled to the mating part Pt.

(3) Effects and effects of the eyeball joint assembly structure The following effects are achieved by the embodiment of the eyeball joint assembly structure.
(3) -1 Since the packing 20 is integrally and firmly assembled to the joint body 12 by screwing the male screw 34 of the bolt 30 into the female screw 24c of the extending portion 24b of the lower seal portion 24, It will not drop out during transportation or during work in the vehicle assembly process.
(3) -2 Since the assembly structure of the eyeball joint integrally assembles the packing 20 to the joint body 12, it is not necessary to assemble the packing 20 or insert the bolts 30 when assembling the vehicle, simplifying the work process. Can be
(3) -3 Since the female screw 24c of the packing 20 is screwed into the male screw 34 in the same shape as the male screw 34 of the bolt 30, it does not hinder the fastening operation of the bolt 30 during vehicle assembly. .
(3) -4 When the extending portion 24b of the packing 20 is inserted into the bolt hole 18, a gap corresponding to the thickness can be used as an oil passage, so that the bolt hole is formed to form the oil passage. There is no need to cut the inner peripheral wall of 18 and the processing cost can be reduced.

(4) Other Embodiments The present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.
(4) -1 FIG. 8 is a perspective view showing a packing according to another embodiment. In the packing 20B of this embodiment, an extending portion 24Bb provided on the lower seal portion 24B is projected from a part of the peripheral edge of the through hole 24Ba, and an internal thread 24Bc is formed on the inner wall. According to this embodiment, the deformation amount of the plastic working of the extending portion 24Bb can be reduced, and the processing can be simplified.
(4) -2 In the above embodiment, the drill Dr is used as the processing means for the female screw 24c. However, the present invention is not limited to this, and the inner wall of the extending portion is simultaneously screwed into the bolt 30 at the time of temporary fixing. The part may be plastically deformed to form the female screw 24c at the same time. This eliminates the need for a jig for processing and simplifies the process.
(4) -3 The extending portion 24b of the above embodiment is formed by plastic working after being mounted on the eyeball portion 16, but may be formed in advance using a processing jig corresponding to the eyeball portion 16.
(4) -4 In the said Example, although the structure applied to the brake system was demonstrated, it is applicable not only to this but another hose with a joint.

It is sectional drawing which shows the assembly structure of the eyeball joint concerning one Example of this invention. It is sectional drawing which expands and shows the principal part of FIG. It is a perspective view which shows packing. It is explanatory drawing explaining the assembly | attachment process of the assembly structure of an eyeball joint. It is explanatory drawing explaining the manufacturing process of packing. It is explanatory drawing explaining the assembly | attachment process of the assembly structure of an eyeball joint. It is explanatory drawing explaining the state which assembled | attached the assembly structure of the eyeball joint. It is a perspective view which shows the packing concerning another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Eyeball joint 12 ... Joint body 14 ... Hose connection part 14a ... Socket 14b ... Nipple 14c ... Oil passage 16 ... Eyeball part 16a ... Upper seal surface 16b. ..Lower seal surface 17 ... Hut 18 ... Bolt hole 18a ... Oil passage 20 ... Pack 20B ... Pack 22 ... Upper seal 22a ... Through hole 24 ... Lower seal portion 24B ... Lower seal portion 24a ... Through hole 24b ... Extension portion 24Ba ... Through hole 24c ... Female screw 24Bc ... Female screw 24Bb ... Extension portion 26. ..Connecting part 30 ... Bolt 32 ... Bolt head 34 ... Male thread 36 ... Oil passage BH ... Brake hose Dr ... Drill Pt ... Parts Pta ... Thread groove Ptb ... engagement hole

Claims (3)

An eyeball portion (16) having an upper seal surface (16a) and a lower seal surface (16b), and facing the upper seal surface (16a) and the lower seal surface (16b) and penetratingly formed in the eyeball portion (16). A joint body (12) having a bolt hole (18)
The bolt hole (18) is sealed to the outside by being in close contact with the upper seal surface (16a), and the upper seal portion (22) having a through hole (22a) is in close contact with the lower seal surface (16b). The bolt hole (18) is sealed to the outside and the lower seal part (24) having a through hole (24a) is connected to the upper seal part (22) and the lower seal part (24). A packing (20) having a portion (26);
It has a bolt head (32) and a male screw (34), and has a through hole (22a) in the upper seal portion (22), the bolt hole (18), and the through hole (24a) in the lower seal portion (24). The upper seal part (22) is pressed against the upper seal surface (16a) with the bolt head (32), and the male screw (34) is inserted into the through hole ( A bolt (30) passing through 24a);
With
The lower seal portion (24) includes an extending portion (24b) extending from the inner peripheral edge of the through hole (24a) along the inner peripheral wall of the bolt hole (18). 24b) has an internal thread (24c) that engages with the external thread (34). In the assembly structure of the eyeball joint according to claim 1,
The female screw (24c) is an assembled structure of an eyeball joint formed by screwing the same shape tool into the male screw (34) or the male screw (34) and plastically deforming it. In the assembly structure of the eyeball joint according to claim 1,
The joint body (12) has an oil passage connected to a brake hose,
Part of the oil passage is an eyeball joint composed of a gap surrounded by an outer peripheral portion of the bolt (30), an inner peripheral wall of the bolt hole (18), and an end of the extended portion (24b). Assembly structure.

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