JPH10318369A - Split boot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and forcibly join both split parts by opening a pair of split parts partitioned in an axial direction, inserting them into an universal joint, inserting and attaching a male joining part fixed to a first split part into a female joining groove of a second split part, locking an extraction part with a lock groove, and sealing and then joining both split parts with each other. SOLUTION: In a split boot 1 installed on an universal joint, a male joining part 4 is engagingly mounted on a split part 2 of a split surface 2a side, and a female joining groove 5 is formed on a split part 3 of a split surface 3a side. In the split boot 1, both split surfaces 2a, 3a are opened, and is inserted into the universal joint. The split boot 1 is joined by locking the male joining part 4 with the female joining groove 5. Namely, a holding groove 9 is formed on the split part 2, and a locking groove 9a is formed in the holding groove 9. A fixing part 4c of one end of the male joining part 4 is locked and fixed to the holding groove 9. A detent part 4b is formed on the other end, while forming a supporting part 4a on the male joining part 4, and the detent part 4b is locked with the locking groove 5a of the female joining groove 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split boot which can be mounted between side split surfaces without removing shaft connecting portions at both ends of a universal joint.

[0002]

2. Description of the Related Art In the prior art relating to the present invention, there is a split boot shown in FIGS. FIG. 7 is a perspective view of the split boot that can be split. FIG. 8 is a cross-sectional view showing a state where the divided surfaces are combined.

In FIG. 7, a bellows-shaped split boot 51 is shown.
Is divided in one axial direction. One of the divided surfaces is formed in the insertion piece 52 so that the divided surfaces can be connected to each other, and the other divided surface is formed in the groove-shaped concave portion 55. ing.

FIG. 8 shows a state in which the insertion piece 52 is press-fitted into the groove-shaped concave portion 55 and connected thereto. The insertion piece 52 provided on one of the divided surfaces is formed in an arrowhead shape from the divided surface, and has a locking step 53 bulging on both sides. The locking step 53 is formed on a squeezed inclined surface 54 from both sides toward the tip.
The insertion piece 52 is formed over the entire length in the axial direction along a bellows-like divided surface.

[0005] Next, a groove-shaped recess 55 is formed on the other divided surface so that the insertion piece 52 can be inserted. The groove-shaped concave portion 55 is opened with a projecting piece 56 on the dividing surface side, and the inside thereof is formed in a space having a triangular cross section so that the distal end side of the inserting piece 52 can be engaged with a gap. I have.

When the insertion piece 52 is press-fitted into the groove-shaped recess 55, it is fitted in a state as shown in FIG. 8, the locking step 53 is locked to the overhanging piece 56, and the two divided surfaces are connected. Try to hold. For this reason, the thickness T of the split boot 51 is about twice the thickness of a normal boot.

Further, as another prior art, there is a split boot 61 shown in FIG. FIG. 9 is a sectional view of the split boot taken from a split surface. This split boot 61
Is an improvement in that the split boot 51 shown in FIG. 7 cannot cope with the operation because of its thickness. For this reason, the connecting portion 6
Other than 2, the normal thickness t is obtained, but the divided portion has a required thickness T of 2t or more, so that uniformity cannot be obtained as a whole and abnormal deformation may be caused.

FIG. 10 is a cross-sectional view of a split boot 71 according to still another prior art, taken from a split surface. The boot 71 has substantially the same overall configuration as the boot 51 shown in FIG. However, in the groove-shaped concave portion 75 serving as a joint portion, a wire is bent into a U shape, and a reinforcing member 77 is formed by continuously forming many U-shaped wires in a line. A wire 78 is also embedded in the insertion piece 72 in such a manner that a large number of wires are folded back to a predetermined length and arranged in a line.

Then, by fitting the insertion piece 72 into the groove-shaped concave portion 75, the connecting portion of the split boot 71 is connected.

[0010]

In the above prior art, the boot 51 shown in FIG. 7 is formed in a bellows shape and is made of a rubber material so as to be flexible. For this reason, when the one insertion piece 52 is inserted and fixed in the other groove-shaped concave portion 55, it is difficult to insert it because the friction as the rubber material is large. In addition, since it is bent in a bellows shape, insertion becomes more difficult, and the working efficiency is reduced. Further, since the connecting portion becomes thicker, the thickness of the entire boot 51 becomes thicker as the thickness increases, and it may not be possible to cope with a change during operation. Further, as shown in FIG. 9, only the connecting portion becomes thick,
Deformation during operation 1 may become abnormal. or,
When the mounting portion is tightened by the band 57, the thickness of the divided portion in the circumferential direction is different due to the thickness of the divided portion.

Although the wire 78 is made of wire in order to have flexibility, the reinforcing material 77 embedded in the groove 75 inserts the insertion piece 72 into the groove 75. Makes insertion difficult. This is the reinforcement 77
This is because when the wire material 78 is inserted into each other, abnormal deformation accompanies the direction perpendicular to the drawing (the axial direction of the groove-shaped concave portion 75 or the insertion piece 72).

Further, since the reinforcing member 77 is buried, the joined divided portion is formed to be thick, and the embedding of the reinforcing member 77 or the like adversely affects the flexibility of the entire boot 71 during operation. Will be given.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to facilitate the joining of the divided surfaces of the divided boots and to strengthen the joining force. . Another object of the present invention is to make the thickness in the circumferential direction uniform to prevent abnormal deformation, and to improve durability and flexibility. Another object is to facilitate the formation of the split boot.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the technical means thereof is configured as follows. That is,

A split boot having an annular attachment portion at one end and a fitting portion to be fitted to a shaft of a shaft coupling, and a fitting portion to be fitted to an outer ring at the other end. And a second divided portion on the other side, and the first divided portion has a retaining groove formed in the axial direction along the first divided portion and provided with a locking groove inside. A fixing portion that is locked and retained in the retaining groove of the retaining groove is provided at one end, and a material of the first divided portion having a retaining portion formed at the other end of the plate-shaped support portion protruding from the first divided portion. Having a hard male connection, the second
The divided portion has a female coupling groove for accommodating the support portion by forming a locking groove for locking with the retaining portion in the inside formed in the axial direction along the second divided portion.

[0016]

In the split boot according to the present invention, both split portions 2 and 3 are opened and inserted into the universal joint A from the side of the shaft joint. Next, the male coupling part 4 fixed to the first division part 2 is inserted into the female coupling groove 5 of the second division part 3. Then, the retaining portion 4b is locked in the locking groove 5a, and the first divided portion 2 and the second divided portion 3 are hermetically joined.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the split boot according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side view showing a split boot according to an embodiment of the present invention attached to a universal joint A.

In FIG. 1, reference numeral 1 denotes a split boot. The split boot 1 is formed on a first split surface 2a and a second split surface 3a which are split on the side surface in the axial direction. The male coupling part 4 is provided on the first division 2 on the first division surface 2a side.
And a female coupling groove 5 is formed in the second division 3 on the second division surface 3a side.

Then, both split surfaces 2 of the split boot 1
a, 3a are opened, inserted into the universal joint A, and the male coupling portion 4 is engaged with the female coupling groove 5 to be coupled. Next, the small-diameter mounting portion 20 at one end of the split boot 1 is fitted to the shaft 30, and the large-diameter fitting portion 21 is fitted to the outer ring 31 of the universal joint A. Then, the mounting portion 20 is connected to the shaft 30 by the first band 32.
And the fitting portion 21 is fastened to the outer ring 31 with the second band 33. The above is the overall configuration of the present invention.

FIG. 2 is a side view of the split boot 1 shown in FIG.

In FIG. 2, as described above, the mounting portion 20 is provided on the small diameter side at one end of the split boot 1, and the fitting portion 21 is formed on the large diameter portion at the other end. . A mounting groove for the first band 32 is formed on the outer peripheral surface of the mounting portion 20, and a mounting groove for the second band is similarly formed on the outer peripheral surface of the fitting portion 21. The bellows portion 6 is formed between the attachment portion 20 and the fitting portion 21.

The split boot 1 is divided into one annular portion in the axial direction. One of the divided portions is formed in the first divided portion 2, and the other is formed in the second divided portion 3.

The first division 2 has a first division surface 2a which is hermetically joined to the second division 3. In addition, the second divided portion 3 has a second divided surface 3 that is hermetically bonded to the first divided surface 2a.
a is formed.

The first coupling section 2 includes a male coupling section 4
Is inserted. The male joint 4 may be bonded via an adhesive, or may be integrated by baking at the time of molding. In the second divided portion 3, a female coupling groove 5 with which the male coupling portion 4 is engaged is formed along the second divided portion 3 to near both ends in the axial direction.

FIG. 3 is a cross-sectional view showing the connecting portion B taken along the line AA of FIG.

In FIG. 3, a holding groove 9 is formed in the first divided portion 2 in the axial direction along the first divided portion 2. Inside the holding groove 9, a locking groove 9a is further provided.
It is formed with. The locking groove 9a may be formed intermittently as needed. In that case, the fixing portion 4c fitted into the locking groove 9a of the male coupling portion 4 is formed into the same shape and engages.

A fixing portion 4c at one end of the male coupling portion 4 is locked and fixed to the holding groove 9. The fixing portion 4c is thicker than the supporting portion 4a and formed in a triangular cross section, and is fixed to a locking groove 9a formed in the same shape. Further, the male coupling portion 4 is formed on a plate-shaped support portion 4a, and has a thick stopper portion 4b having a triangular cross section at the other end. The male coupling portion 4 is formed by molding a rubber or resin material that is harder than the second divided portion 3. The supporting portion 4a is formed thin so as to exhibit flexibility.

The second dividing part 3 is provided with a female coupling groove 5, which is divided into a groove having the same shape as the cross section of the male coupling part 4 so that the male coupling part 4 is engaged. The boot 1 is formed up to near both ends. The inside of the female coupling groove 5 is formed in a locking groove 5a having a triangular cross section.

The first divided portion 2 and the second divided portion 3 are formed to have the same thickness as that of a conventional boot because the supporting portion 4a of the male coupling portion 4 can be formed thin. At the same time, the male connecting portion 4 has a thin supporting portion 4a, a fixing portion 4c at both ends and a retaining portion 4b.
Is formed thick, so that the supporting portion 4a has a function to be easily deformed.

As shown in FIG. 3, when the male coupling portion 4 is engaged with the female coupling groove 5, the retaining portion 4b of the male coupling portion 4 is engaged with the retaining groove 5a of the female coupling groove 5 and joined. The first divided surface 2a can be configured to be in a hermetically bonded state by being pressed against the second divided surface 3a.

FIG. 4 is a sectional view showing the second division surface 3a of FIG.

In FIG. 4, the second divided surface 3a has
A female coupling groove 5 is formed over the entire length along the division surface 3a. Both ends of the female coupling groove 5 may penetrate or may be formed at a dead end. Both ends of the female coupling groove 5 in FIG. 4 are formed so as to penetrate, whereas the one shown in FIG. 2 is formed at a dead end.

FIG. 5 is a perspective view of the male coupling section 4 shown in FIG.

In FIG. 5, both ends of the male joint 4 are
Since it is engaged with the attachment portion 20 and the fitting portion 21, it has a plate shape, but since it is engaged with the intermediate bellows portion 6 of both, the plate shape is formed in a waveform. The material of the male coupling portion 4 is formed by molding a resin.

Both ends in the width direction of the male connecting portion 4 are formed with a retaining portion 4b and a fixing portion 4c having a triangular cross section. The male coupling portion 4 is inserted into the holding groove 9 and the female coupling groove 5 of the two divided portions 2 and 3, but the fixing portion 4c is bonded by using an adhesive or is baked by integral molding. be able to. Further, the support portion 4a of the male coupling portion 4 is made thin to have flexibility.

FIG. 6 is a perspective view of a male connecting portion 4 showing still another embodiment.

In FIG. 6, the supporting portion 4a of the male connecting portion 4
A retaining portion 4b and a fixing portion 4c are formed at both ends in the width direction, and a number of slits 7 are provided in the retaining portion 4b and the fixing portion 4c in the longitudinal direction of the male coupling portion 4.

In addition to the configuration shown in FIG. 6, another embodiment in which a slit 7 is formed over the entire length of the retaining portion 4b and the fixing portion 4c is employed. Insert this slit 7 into the retaining portion 4
When the split boot 1 is deformed, it can be effectively prevented from sliding in the axial direction with respect to the female coupling groove 5 of the split boot 1 together with the flexibility provided by the slit. Since the connecting portion 4 is also deformed in the same manner as the split boot 1, an effect having a high flexibility as a whole can be expected.

The split boot 1 configured as described above is
As shown in FIG. 1, the male coupling portion 4 is engaged and fixed to the female coupling groove 5 and assembled. Accordingly, the first divided surface 2a and the second divided surface 3a can be hermetically joined as a function of a rubber material, and the divided surfaces are cut off by the male coupling portion 4, so that the interior of the divided boot 1 is effectively sealed. Will be.

Further, when assembling the split boot 1 into the universal joint A, both ends of the universal joint A are disassembled and removed, and the universal joint A is kept mounted without performing a difficult operation such as insertion from one end. In this state, the split boot 1 can be mounted on the universal joint A very easily by inserting the split boot 1 between the divided surfaces from the side of the universal joint A while inserting it.

[0042]

According to the split boot of the present invention, since the male connecting portion is formed of a harder material than the material of the split boot, it is extremely easy to insert into the female connecting groove. Moreover, since the supporting portion of the male joint can be formed thin, the thickness of the entire split boot is made uniform without increasing the thickness of both split portions, and when used for a universal joint, it is bent by the thin supporting portion. Flexibility corresponding to the operation can be expected. Furthermore,
Since the first divided portion and the second divided portion can be firmly connected to each other by the male coupling portion having the retaining portion, the two divided surfaces can be press-contacted and sealed and joined, and the divided surfaces are blocked by the male coupling portion. Therefore, the sealing force is further exhibited.

[Brief description of the drawings]

FIG. 1 is a side view of a split boot attached to a universal joint according to an embodiment of the present invention.

FIG. 2 is a side view showing a state before the split boot shown in FIG. 1 is attached.

FIG. 3 is a sectional view taken on line AA of FIG. 2;

FIG. 4 is a cross-sectional view of the split boot shown in FIG. 2 taken from a split surface.

FIG. 5 is a perspective view of a male coupling section shown in FIG. 2;

FIG. 6 is a perspective view of a male connecting portion showing another embodiment according to the present invention.

FIG. 7 is a perspective view of a conventional split boot.

FIG. 8 is a cross-sectional view of the connecting portion of FIG. 7;

FIG. 9 is a cross-sectional view of a split boot according to another conventional example.

FIG. 10 is a partial sectional view of a split boot according to still another conventional example.

[Explanation of symbols]

 Reference Signs List 1 split boot 2 first split portion 2a first split surface 3 second split portion 3a second split surface 4 male coupling portion 4a support portion 4b retaining portion 4c ... Fixing part 5 ... Female coupling groove 5a ... Locking groove 6 ... Bellows part 7 ... Slit 9 ... Holding groove 9a ... Locking groove 20 ... Mounting part 21 ... Fitting part 30 ... Shaft 31 outer ring 32 first band 33 second band 51 boot 52 insertion piece 53 locking step 54 inclined surface 55 grooved recess 56 projecting piece 57 Band 61 Split boot 62 Joining part 72 Insert piece 75 Groove recess 77 Reinforcing material 78 Wire material A Universal joint B Joining part T Necessary Thickness t: Thickness

Claims (1)

[Claims] 1. A split boot having an attachment portion (20) formed at one end to form an annular shape and fitted to a shaft of a shaft coupling, and a fitting portion (21) fitted to an outer ring at the other end. The one divided in the axial direction has a first divided part (2) and the other has a second divided part (3), and the first divided part (2) has the first divided part (2). Having a retaining groove (9) provided with a retaining groove (9a) in the interior formed in the axial direction along the axis, and being retained by being retained in the retaining groove (9a) of the retaining groove (9). A part (4c) is provided at one end, and a plate-shaped support part (4a) projecting from the first division part (2) is formed with a retaining part (4b) at the other end of the plate-like support part (4a). A harder male coupling part (4), wherein the second split part (3) has an inside formed in the axial direction along the second split part (3). b) and to engage the locking groove (5
A split boot characterized in that it has a female coupling groove (5) forming a) and accommodating said support part (4a).