JPH09144880A - Divided boot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably perform sealing to the inside and the outside of divided boots by constituting the divided boots which can be installed from between divided surfaces without removing a connecting part of a universal joint by fitting and installing an inside boot and an outside boot by dislocating the first and the second divided surfaces in the circumferential direction. SOLUTION: In a divided boot 40, mutual first divided surfaces 2 and 2 of an inside boot 1 are opened, and are fitted to a shaft coupling 45, and mutual second divided surfaces 22 and 22 of an outside boot 21 are opened, and an inner peripheral surface is inserted into an outer peripheral surface of the inside boot 1, and the respective divided surfaces 2 and 22 are dislocated from each other, and are integrally fitted and installed. In this case, a first recessed part of the inside boot 1 and a second projecting part of the outside boot 21 are fitted and installed, and both boots 1 and 21 are integrally joined together, and afterwards, a band 41 is fitted to a band groove 33 formed in fitting installing parts 4 and 24 and installing parts 5 and 25, and is fastened and fixed to the shaft coupling 45. Since the respective divided surfaces 2 and 22 are joined together in a condition of being dislocated in the circumferential direction, joining of the divided sursurfaces is facilitated, and its binding power is strengthened.

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 from between split surfaces without removing a connecting portion of a universal joint.

[0002]

2. Description of the Related Art In the prior art relating to the present invention, there is a boot shown in FIGS. FIG. 12 is a perspective view of the splittable boot. Further, FIG. 13 is a sectional view showing a state in which the division surfaces are joined. Further, FIG.
It is sectional drawing of the boot cut | disconnected along the division part.

In FIG. 12, the bellows-shaped boot 51 is
One division surface is divided in the axial direction, and one division surface is formed in the insertion piece 52 so that they can be coupled to each other, and the other division surface is formed in the annular recess 55.

FIG. 13 shows that the insertion piece 52
In a press-fitted state. 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. And, it is formed on the inclined surface 54 that is squeezed from both sides of the locking step portion 53 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, an annular concave portion 55 is formed on the other divided surface so that the insertion piece 52 can be inserted. The annular recess 55 has a projecting piece 56 on the split surface side and opens, and the inside 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. .

Then, when the insertion piece 52 is press-fitted into the annular recess 55, the insertion piece 52 is fitted in the state as shown in FIG. 13, the locking step portion 53 is locked to the overhanging piece 56, and the two divided surfaces are brought into a joined state. Try to hold. In addition, in FIG. 14, since the insertion piece 52 and the annular recess 55 are formed, the coupling portion is formed thicker along the axial direction than other portions.

Further, as another conventional technique, there is a boot 61 shown in FIG. FIG. 15 is a sectional view of the coupling portion of the boot 61.

The boot 61 is the boot 5 shown in FIG.
In contrast to No. 1, the molded part made of rubber material is formed in substantially the same shape. However, in the annular recess 55, which is a connecting portion, a reinforcing member 62 is embedded by bending a wire into a U-shape and continuously forming a large number of U-shaped ones in a row. Further, a plate-like member 63 is embedded in the insertion piece 52, which is formed by folding a large number of wires in a certain length to form a row.

By fitting the insertion piece 52 into the annular recess 55, the joint portion of the boot 61 is joined.

[0010]

By the way, the boot 51 shown in FIG. 12 is formed in a bellows shape and is made of a rubber material in order to be flexible. Therefore, one of the insertion pieces 52 is connected to the other annular recess 5
When it is inserted and fixed in the No. 5, 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 joint portion is thick, the thickness of the boot 51 as a whole is thick, and there is a problem in terms of flexibility with respect to deformation during operation. Furthermore, as shown in FIG. 14, since only the connecting portion is thick, there is a problem that the corresponding deformation of the boot during operation becomes abnormal. Further, when tightening with the band 57, there is a variation in thickness due to the thick joint portion in the circumferential direction, which makes tightening difficult.

Further, the boot 61 shown in FIG.
The reinforcing member 62 embedded in the annular recess 55 is used when the insertion piece 52 is inserted into the annular recess 55, although it is made of wire to make the plate 2 and the plate member 63 flexible. Make insertion difficult. This is because when the reinforcing member 62 and the plate-shaped member 63 are inserted into each other, the column direction (annular recess 55
This is because abnormal deformation accompanies the insertion piece 52 in the axial direction).

In addition, since the divided portions connected to embed the reinforcing material 62 are formed to be thick, and the embedding of the reinforcing material 62 and the like, the flexibility of the entire boots 51, 61 during operation is It will have an adverse effect.

The present invention has been made in view of the above problems, and an object thereof is to facilitate the joining of the dividing surfaces of the boot and to strengthen the joining force thereof, and to improve the durability. And to improve flexibility.

[0014]

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

According to a first aspect of the present invention, the fitting portion on one end side is fitted to one portion of the shaft coupling, and the mounting portion on the other end side is fitted to the other portion of the shaft coupling, and the fitting portion and the mounting portion are combined. An annular split boot having a space formed in a bellows portion, having a first split surface split in the axial direction that can be inserted from a side of a shaft coupling, and a first bellows inside the bellows portion. Has an inner boot having a first annular convex portion or a first annular concave portion on the outer peripheral surface of the portion, and an axially divided second divided surface that can be laterally inserted into the outer peripheral surface of the inner boot. A second annular engaging portion is engaged with the inner peripheral surface of the outer second bellows portion of the bellows portion.
Outer annular boot having a second annular convex portion that engages with the first annular concave portion or the first annular concave portion is fitted and coupled by shifting the first dividing surface and the second dividing surface in the circumferential direction. It is a thing. According to a second aspect of the present invention, there is provided a joint surface between an inner boot and an outer boot, the joint surface between an inner first annular convex portion and a second annular concave portion, or the first annular concave portion and a second annular convex portion. The joint surfaces of are connected by at least connecting means. Further, according to a third aspect of the present invention, the split ring is fitted to the inner peripheral surface of the first mountain portion of the inner boot or the outer peripheral surface of the second valley portion of the outer boot.

[0016]

In the split boot of the present invention, the first split portion of the inner boot having the first split surface is opened and the boot is inserted from the side of the shaft coupling. Next, the second split portion having the second split surface of the outer boot is opened, and the split surfaces are fitted to the outer circumferential surface of the inner boot with the split surfaces offset from each other. And the first of the inner boots
The outer boot is integrally fitted to the inner boot while the first and second annular projections and / or the first annular recess and the second annular recess and / or the second annular projection of the outer boot are locked to each other. It is a thing.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a split boot attached to a shaft coupling showing an embodiment according to the present invention.

In FIG. 1, 40 is a split boot.
The split boot 40 is inserted from the side of the shaft coupling 45 by opening the first split surfaces 2 and 2 of the inner boot 1 and fitted into the shaft coupling 45, and at the same time, the second boot of the outer boot 21. The inner peripheral surface 30 is inserted into the outer peripheral surface 10 of the inner boot 1 with the space between the divided surfaces 22, 22 opened, and the divided surfaces 2, 2, 22, 22 are displaced and fitted together.

At this time, the first valley 7 of the inner boot 1
The first recess 12 and the second valley 27 of the outer boot 21.
The second convex portion 31 is fitted and both boots 1 and 21 are integrally coupled. Further, the fitted fitting portions 4 and 24 are combined.
The band 41 is fitted into the band groove 33 formed in the mounting portions 5 and 25 and is fixed to the shaft joint 45 by tightening.

The structure of each part of the split boot 40 will be described below. FIG. 2 is a half sectional view showing the boot 1 inside the split boot 40 shown in FIG. The inner boot 1 is
The first fitting portion 4 that is made of a rubber material and that fits on the shaft 46 of the shaft coupling 45 is formed on one end side. The first fitting portion 4 is provided with a seal portion 13a that fits into the fitting groove 48 of the shaft 46.

On the other end side of the inner boot 1, there is formed a first mounting portion 5 which is fitted to the outer ring 47 of the shaft coupling 45. The first mounting portion 5 is provided with a seal portion 13b on its inner peripheral surface that fits into the mounting groove 49 of the outer ring 47.

Then, the first fitting portion 4 and the first mounting portion 5
An intermediate portion between and is formed in the first bellows portion 9. The first bellows portion 9 is composed of a first mountain portion 6 and a first valley portion 7, and a first inclined portion 8 connecting the mountain portion 6 and the valley portion 7.

As shown in FIG. 4, a semicircular first annular recess 12 is formed in the first valley 7. The outer peripheral surface of the first annular recess 12 is a first annular groove surface 14.
Further, the thickness of the second valley portion 27 is formed to be thicker than the thickness of the first crest portion 6, and serves to strengthen the fitting force of the outer boot 21 with the second annular convex portion 31. Is done. at the same time,
The formation of the first annular concave portion 12 makes the first valley portion 7 flexible because it is easily deformed.

The inner boot 1 is formed with axially divided widths on both sides in the first divided portions 3, 3. The divided surfaces of the first dividing portions 3 and 3 are the first dividing surfaces 2 and 2. The outer peripheral surface 10 is formed to have a size to fit with the inner peripheral surface 30 of the outer boot 21.

It should be noted that the same idea as the second annular convex portion 31 is provided on the first crest portion 6 in the same manner as the trough portion of FIG. 4 so that the second crest portion 27 of the outer boot 21 is also the same. It may be fitted to the first annular recess 12 provided.

Next, FIG. 3 shows a half sectional view of the outer boot 21. The outer boot 21 is made of a resin material.

In FIG. 3, a second fitting portion 24 is formed on one end side of the outer boot 21, and a band groove 33 is provided on the outer peripheral surface. A second mounting portion 25 is formed on the other end side of the outer boot 21, and a band groove 33 is formed on the outer peripheral surface. A band 41 is attached to the band groove 33.

An intermediate portion between the second fitting portion 24 and the second mounting portion 25 is formed as a second bellows portion 29. This second
The bellows portion 29 of the second peak portion 26 and the second valley portion 27,
The second inclined portion 28 that connects the mountain portion 26 and the valley portion 27
It is composed of

As shown in FIG. 4, the inner peripheral surface 30 of the second valley 27 has a semicircular cross section so as to be fitted into the annular recess 12 of the first valley 7 of the inner boot 1. The second annular convex portion 31 is formed. The outer peripheral surface of the second annular convex portion 31 is a semicircular second annular groove surface 34. The outer boot 21 is also configured to exhibit flexibility by the circular arc-shaped convex portion 31 provided in the second valley portion 27.

Similarly to the inner boot 1, the outer boot 21 is also formed with axially divided second partition portions 23, 23. The divided surfaces of the second dividing portions 23, 23 are the second dividing surfaces 22, 22. Further, the inner peripheral surface 30 of the outer boot 21 is formed in such a shape that it fits and comes into close contact with the outer peripheral surface 10 of the inner boot 1.

The inner boot 1 and the outer boot 21 configured as described above are joined in a state in which the respective divided surfaces 2 and 22 are displaced in the circumferential direction, as shown in the divided boot 40 in FIG. There is. In this connection, the first split surfaces 2 and 2 of the inner boot 1 are opened, and the boots 1 are inserted and fitted from the side surface of the shaft coupling 54.

Then, the first fitting portion 4 on the one end side is attached to the shaft 46.
And the first mounting portion 5 on the other end side is attached to the outer ring 47.
To fit. At the same time, the seal portions 13a and 13b are joined to the fitting groove 48 and the mounting groove 49.

Next, the second split surface 2 of the outer boot 21.
2 and 22 are opened and inserted into the outer peripheral surface 10 of the inner boot 1 from the side. Then, the second fitting portion 24 is fitted to the first fitting portion 4 of the inner boot 1 and the second mounting portion 2
5 is fitted to the first mounting portion 5 of the inner boot 1. At the same time, the first crest 6 and the first trough 7 of the inner boot 1 are fitted to the second crest 26 and the second trough 27 of the outer boot 21, as shown in FIG. To wear. At this time, the first annular concave portion 12 and the second annular convex portion 31 are strongly fitted together.

Then, the band 41 is inserted into the band grooves 33 provided in the second fitting portion 24 and the second mounting portion 25, respectively.
And the fitting portions 4 and 24 are tightened and fixed to the shaft 46 by the respective bands 41, and the mounting portions 5 and 25 are attached to the outer ring 4
Tighten and fix to 7.

In this way, the split boot 40 has the shaft coupling 4
5 is attached. The inner boot 1 and the outer boot 21 are axially fitted with the first crest portion 6, the second crest portion 26, the first trough portion 7 and the second trough portion 27, respectively. They can be combined together so that they do not move. Especially,
As shown in FIG. 4, the first annular recess 12 of the first valley 7 is formed.
Since the second annular convex portion 31 of the inner circumferential surface 30 of the second valley portion 27 is strongly coupled, the inner and outer boots 1 and 21 are integrally coupled.

The first trough portion 7 of the inner boot 1 is the first
To bond between the joint surface between the annular concave portion 12 and the second annular convex portion 31 of the second valley portion 27 of the outer boot 21 via an adhesive 16a such as rubber glue to strengthen the bond between the two. You can also Furthermore, the first ridge portion 6 and the second ridge portion 26 may be bonded to each other by a bonding agent 16a between the joint surfaces.

The inner boot 1 and the outer boot 21 may be made of rubber material for both the inner and outer boots 1, 21. Alternatively, the outer boot 21 may be made of rubber material and the inner boot 1 may be made of rubber material. It may be made of a resin material. Furthermore, both boots 1 and 21 may be made of a resin material. These can be selected as appropriate.

5 to 7 are cross-sectional views of valleys 7 and 27 showing another embodiment of the present invention.

FIG. 5 shows the second annular groove surface 3 of the valleys 7, 27.
4 has a second annular small groove surface 34a formed therein. The annular small groove surface 34a imparts flexibility to the valleys 7 and 27. Further, as another embodiment, a ring 17 made of a resin material, in which one portion is divided into the annular small groove surface 34a.
And the outer boot 21 is held by the inner boot 1. The inner boot 1 and the outer boot 21 are both made of rubber. Further, the joint surface between the two may be adhered by an adhesive 16a such as rubber glue.

In FIG. 6, the valleys 7 and 27 have a triangular cross section. The boot 1 on the inner side and the boot 21 on the outer side are formed.
Are both made of resin material. Then, the second annular groove surface 34
The bottom surface of is widely formed. For this reason, the deformation of each part during operation becomes easy.

FIG. 7 shows the second annular groove surface 3 of the valleys 7, 27.
4 has a circular cross section. And the inner boots 1
The outer boot 21 is made of rubber, and the outer boot 21 is made of resin. Also, the second annular groove surface 3
It is also possible to fit the split ring 17 to the four. Further, the both may be bonded with the adhesive 16a.

8 to 10 are cross-sectional views of the peak portions 6 and 26 showing another embodiment of the present invention.

FIG. 8 shows a structure in which the first annular convex portion 11 is strongly fitted by the second annular concave portion 32 of the second mountain portion 26. The inner and outer boots 1 and 21 are both made of a resin material, but one boot may be made of a rubber material and the other boot may be made of a resin material. Further, both boots can be made of rubber material.

FIG. 9 is a cross-sectional view of both crests 6 and 26 in which the second annular groove surface 34 is formed in an elliptical shape. The joint surface between the first annular convex portion 11 and the second annular concave portion 32 is adhered by a rubber glue adhesive 16a. It is to be noted that the both peak portions 6 and 26 may not be entirely adhered, and may be adhered every other row or every other row.

In FIG. 10, the first annular convex portion 11 and the second annular concave portion 32 of both mountain portions 6 and 26 are axially laminated, and the divided portions 3 and 23 of the laminated portions are made of a resin material. The rivets 16b are connected by a connecting means 16 such as a rivet 16b or a string. It is the same as the case of the above-mentioned adhesion that the two peak portions 6 and 26 to be connected are sufficient even if they are not the whole number sequence.

FIG. 11 shows still another embodiment of the present invention, and is a half sectional view showing a state in which the outer boot 21 is to be coupled to the inner boot 1.

In FIG. 11, the overall structure of the inner boot 1 is substantially the same as that of the inner boot 1 shown in FIG. The difference is that a first annular recess 12 is formed near the first mountain portion 6 of the first inclined portion 8.

The overall construction of the outer boot 21 is shown in FIG.
It is substantially the same as the outer boot 21 shown in FIG. The different point is that the second annular convex portion 31 is formed at a position corresponding to the first annular concave portion 12 of the second inclined portion 28.

The inner boot 1 is made of a rubber material, and the outer boot 21 is made of a resin material. It should be noted that the combination of the inner boot 1 and the outer boot 21 described above is a representative preferred example, and the present invention is not limited to this. It is possible to combine the same kind or different kinds as necessary by experiments. I'm confirming.

A ring 17 made of a resin material, an aluminum material, a steel material or the like cut at one place is fitted on the inner peripheral surface of the first mountain portion 6 of the inner boot 1 as described above, and the outer boot is formed. It can also be supported so as to be fitted integrally with 21. Further, it is a preferable mode that a similar ring 17 is fitted to the outer peripheral surface of the second valley portion 27 of the outer boot 21 to bring the outer boot 21 into close contact with the inner boot 1.

[0052]

【The invention's effect】

A) In the split boot of the present invention, the first split surface and the second split surface are circumferentially displaced from each other so that the inner boot and the outer boot are fitted to each other, so that the split boot is securely sealed inside and outside. can do.

(B) Since the bellows portion is fitted on the inner boot and the outer boot, the fitting can be maintained without moving in the axial direction.

C) With the axial movement thus restricted, the inner boot and the outer boot are fitted by fitting the annular recess and the annular projection of the inner boot and the outer boot. Can be firmly bonded.

D) Therefore, the split boot can be obtained only by opening the split surface of the inner boot and fitting it into the shaft coupling, and by opening the split surface of the outer boot and fitting it on the outer peripheral surface of the inner boot. Therefore, the assembly is extremely easy. Moreover, since the split boot does not require the formation of a thick portion for connection, it exhibits excellent flexibility.

(E) Further, internal pressure may be generated in the split boot during operation, but it can be released from a portion between the inner boot and the outer boot without providing a relief valve, and the internal pressure is reduced. It is possible to prevent damage.

(F) The inner and outer boots can be firmly bonded by bonding the joint surfaces of the annular concave portion and the annular convex portion of the inner boot and the outer boot with the adhesive.

(G) Further, by fitting the split ring to the inner boot, the outer boot, or the annular groove surfaces of the annular protrusions of both boots, the inner and outer boots can be easily and strongly coupled. .

[Brief description of the drawings]

FIG. 1 is a half sectional view of a split boot showing an embodiment of the present invention.

FIG. 2 is a half sectional view of a boot inside the split boot shown in FIG.

FIG. 3 is a half cross-sectional view of an outer boot of the split boot shown in FIG.

FIG. 4 is an enlarged cross-sectional view of a valley portion of the split boot shown in FIG.

FIG. 5 is an enlarged sectional view of a valley portion of a split boot showing a second embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a valley portion of a split boot showing a third embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view of a valley portion of a split boot showing a fourth embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view of a mountain portion of a split boot showing a fifth embodiment of the present invention.

FIG. 9 is an enlarged cross-sectional view of a mountain portion of a split boot showing a sixth embodiment of the present invention.

FIG. 10 is an enlarged cross-sectional view of a mountain portion of a split boot showing a seventh embodiment of the present invention.

FIG. 11 is a half cross-sectional view of a split boot before assembly, showing another embodiment of the present invention.

FIG. 12 is a perspective view of a conventional split boot.

FIG. 13 is a cross-sectional view of the split connection portion of FIG.

FIG. 14 is a cross-sectional view of a coupling portion of another conventional split boot.

FIG. 15 is a cross-sectional view of a coupling portion of still another conventional split boot.

[Explanation of symbols]

 1 ... Inner boot 2 ... First split surface 3 ... First split portion 4 ... First fitting portion 5 ... First mounting portion 6 ... First mountain portion 7 ... 1st valley part 8 ... 1st sloped part 9 ... 1st bellows part 10 ... Outer peripheral surface 11 ... 1st annular convex part 12 ... 1st annular recessed part 13a, 13b ... Seal part 14 ...... First annular groove surface 16 ...... Coupling means 16a ...... Adhesive 16b ...... Rivet 17 ...... Ring 21 ...... Outer boot 22 ...... Second split surface 23 ...... Second split portion 24 ...... Second fitting portion 25 ...... Second mounting portion 26 ...... Second ridge portion 27 ...... Second valley portion 28 ...... Second inclined portion 29 ...... Second bellows portion 30 ... ... inner peripheral surface 31 ... second annular convex portion 32 ... second annular concave portion 33 ... band groove 34 ... second annular groove surface 34a ... second annular small groove surface 40 ... split boot 41, 57 ... band 45 ... shaft coupling 46 ... shaft 47 ... outer ring 48 ... fitting groove 49 ... mounting groove 51, 61 ... boot 52 ... insertion piece 53 ... locking step 54 …… Inclined surface 55 …… annular recess 56 …… Overhanging piece 62 …… Reinforcement material 63 …… Plate material

Claims (3)

[Claims] 1. A fitting portion on one end side is fitted to one portion of a shaft coupling, and a mounting portion on the other end side is fitted to the other portion of the shaft coupling, and the fitting portion and the mounting portion are joined together. An annular split boot formed in a bellows portion (9) between the first and second split boots (2, 2) which is axially split and can be inserted from the side of the shaft coupling, and the bellows. The first annular convex portion (11) is formed on the outer peripheral surface (10) of the first bellows portion (9) inside the portion.
Alternatively, an inner boot (1) having a first annular recess (12) and an axially-divided second split surface that can be laterally inserted into the outer peripheral surface (10) of the inner boot (1). A second annular shape having (22, 22) and engaging with the first annular convex portion (11) on the inner peripheral surface (30) of the outer second bellows portion (29) of the bellows portion. The outer boot (21) having a second annular projection (31) that engages the recess (32) or the first annular recess (12) is the first boot.
Split surface (2, 2) and the second split surface (22, 22)
Split boots characterized by being fitted and coupled while being shifted in the circumferential direction. 2. The first annular protrusion (1) on the joint surface between the inner boot (1) and the outer boot (21).
1) The joint surface between the second annular recess (32) and the first annular recess (12) and the second annular protrusion (31).
2. The split boot according to claim 1, wherein the joint surfaces with and are connected by at least connecting means (16). 3. A split ring (17) on the inner peripheral surface of the first peak (6) of the inner boot (1) or on the outer peripheral surface of the second valley (27) of the outer boot (21). ) Is fitted, the split boot according to claim 1.