JP2697764B2 - Universal shaft coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal shaft coupling in which a drive side shaft and a driven side shaft forming a predetermined angle range are connected by a connecting member via an intermediate member so that power can be transmitted. It is.

[0002]

2. Description of the Related Art As is well known, a universal shaft joint (universal joint) is effective as a means for transmitting power from a drive-side shaft whose axial direction is shifted to a driven-side shaft, and is found everywhere. is there. FIG. 12 shows an example of such a universal joint. In such a universal joint 1, power can be transmitted between the drive-side shaft and the driven-side shaft via the relay member 4 by the horseshoe-shaped connectors 2 and 3.
The connection is configured to be displaceable in four directions. Further, the connectors 2 and 3 and the relay member 4 can transmit power between the drive side shaft and the driven side shaft having different axial directions through the connectors 2 and 3 by the roller 5 provided on the relay member 4. It is composed.

[0003]

However, according to the universal shaft coupling 1, there is a problem in strength such as a weak pulling force in the axial direction. In addition, since the connectors 2 and 3 are formed in a C-shape and the like, the shape is complicated and the processing is correspondingly troublesome. The present invention has been proposed in view of such a background, and has a simple structure and a strength structure that can sufficiently cope with a large load, and has a structure that is easy to process.
It is an object to provide a universal shaft coupling.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a drive shaft and a driven shaft forming a predetermined angle range are each transmitted by a connecting member via an intermediate member via an intermediate member. In a universal shaft joint that is connected as possible,
The driving-side and driven-side connecting members are respectively a cylindrical bearing portion that connects the driving-side shaft and the driven-side shaft, and the bearing portion has a central shaft that penetrates the bearing portion in the axial direction. Point symmetry
And a pair of connecting pieces projecting from the said pair of connecting pieces formed a portion facing each other, each drive-side shaft, the inner wall surface shape of a cylinder about an axis perpendicular to the driven side shaft On the other hand, the intermediate member has a support surface formed by a pair of connecting pieces of both connecting members so that the intermediate member sandwiches the curved surface of the pair of connecting pieces and slidably abuts. And a pair of connecting pieces of the two connecting members are assembled to these supporting pieces from one direction, and a contact surface of the pair of connecting pieces is engaged with a contact surface of the supporting piece. An inclined surface is formed so as to be directed to the contact surface. In the above configuration, at least the intermediate member is formed of a self-lubricating member.

[0005]

When assembling a universal joint, a connecting piece of a connecting member is inserted into a support piece having an abutting surface of an intermediate member in a direction along the inclined surface from the inclined surface toward the abutting surface. So that Since the intermediate member is formed of a member having self-lubricating properties, even if the curved surface of the connecting piece and the contact surface of the support piece are in close contact, the assembly is smooth and the lubrication is improved. Wear can be suppressed even without the material, and the allowable transmission angle between the drive side shaft and the driven side shaft can be made larger than before, without rattling after assembly.

[0006]

Next, a universal joint according to the present invention will be described.
One embodiment will be described below with reference to the accompanying drawings. FIGS. 1 and 2 show a universal shaft coupling 10. The universal joint 10 is configured such that a drive-side shaft 11 and a driven-side shaft 12 that form a predetermined angle range are dynamically connected to each other by connecting members 13 and 14 via an intermediate member 15.
The driving side and driven side connecting members 13 and 14 (FIGS. 5 and 7)
Are cylindrical bearings 13a, 14a, and the bearings 13a, 14a, in which the drive-side shaft 11 and the driven-side shaft 12 are connected by a fastening member such as a bolt.
A pair of connecting pieces 13b, 14b projecting symmetrically with respect to a central axis passing through the bearings 13a, 14a in the axial direction, and the intermediate member 15 and the bearings 13a, 14a are formed at a predetermined angle. Within the range, the power is connected so as to be able to be transmitted. The pair of connecting pieces 13b and 14b are formed by opposing each other at a driving side shaft 11 and a driven side shaft 12 respectively.
The curved surfaces 13c and 14c are formed on the inner wall surface of a cylinder centered on the axes X and Y perpendicular to the axis (see FIG. 3). The connection members 13 and 14 employ a polyacetal resin as a material and are formed by molding.

On the other hand, the intermediate member 15 is
A support piece having a contact surface 16 formed so as to be slidably abutted by the pair of connection pieces 13b, 14b via curved surfaces 13c, 14c of the pair of connection pieces 13b, 14b. Seventeen. Then, a pair of connecting pieces 13b and 14b of the driving side and driven side connecting members 13 and 14 are assembled to the supporting piece 17 from one direction, and the contact surface 16 of the supporting piece 17 is formed with a curved surface 13c of the pair of connecting pieces. , 14c is formed with an inclined surface 18 facing the contact surface 16 of the support piece 17 (see FIG. 4). The support piece 17 is formed in a substantially cross shape (see FIG. 6). The inclined surface 18 is
It is inclined downward by about 30 degrees toward the contact surface 16 of the support piece 17. Further, the intermediate member 15 is made of nylon 6 having a cylindrical shape and high self-lubricating property and moldability. Further, a fluororesin can also be adopted.

When the universal joint 10 is assembled in the universal joint 10 having the above structure, the intermediate member 15
The support piece 17 on which the contact surface 16 is formed has a slope 1
The connecting pieces 13 b of the connecting members 13, 14 from the direction along the inclined surface 18 from 8 to the contact surface 16.
14b (FIGS. 9, 10, and 11).
reference). Then, the curved surfaces 13c, 14c of the pair of connecting pieces 13b, 14b are slidably engaged with the contact surface 16 of the support piece 17, and as shown in FIG. And the driven side shaft 12 can be connected so as to transmit power. Since the intermediate member 15 is made of a self-lubricating resin,
The contact surface 16 of the support piece 17, which is the contact point between the pair of connection pieces 13 b, 14 b of the drive side and driven side connection members 13, 14, and the curved surfaces 13 c of the connection pieces 13 b, 14 b,
Even if it is processed so that it closely slides, the lubrication material is unnecessary because the assembly is smooth and the friction can be suppressed. In addition, the allowable transmission angle can be made larger than that of the existing connecting member without rattling after assembling.

The support piece 17 of the intermediate member 15
Are curved surfaces 13c, 14c of the connecting pieces 13b, 14b.
The contact surface 16 of the support piece 17 that is in contact with the intermediate member 15 is parallel to diagonal lines that pass through the center point of the intermediate member 15 and are orthogonal to each other, and the contact surface 16 is a pair of connection pieces 13 b of the connection members 13 and 14. It is also a surface that receives the rotational power received from the 14b.
In the direction along 8, the connection pieces 13b and 14b of the connection members 13 and 14 can be pulled out only by an operation in one direction, so that the connection pieces 13b and 14b can be pulled out in the axial direction of the drive side shaft 11 and the driven side shaft 12. Can be sufficiently secured against tension. Further, since the connecting structure between the connecting members 13 and 14 and the intermediate member 15 can be configured to be able to slide closely, there is no backlash, and the parts are integrally formed. Since only 14 and the intermediate member 15 are used, the structure is simple, there is no problem in strength, and processing is easy.

[0010]

As described above, according to the present invention, the structure is simple and the moldability is good. By providing the intermediate member with a self-lubricating member that provides high strength, no lubricating material is required even if the contact portions between the drive side and the driven side connecting members are slid close to each other. And effects such as smooth assembling can be obtained.

[0011]

[Brief description of the drawings]

FIG. 1 is an external perspective explanatory view showing one embodiment of a universal joint according to the present invention.

FIG. 2 is an explanatory side view of the universal joint shown in FIG. 1;

FIG. 3 is an exploded perspective view of the universal joint shown in FIGS. 1 and 2;

FIG. 4 is an exploded side view of the universal joint shown in FIGS. 1 and 2;

FIG. 5 is an external perspective view of a connecting member of a driving shaft.

FIG. 6 is an external perspective view of an intermediate member.

FIG. 7 is an external perspective view of a connection member of a driven shaft.

FIG. 8 is an external perspective view showing a state in which a driving side shaft and a driven side shaft which are shifted in the axial direction are connected to each other.

FIG. 9 is a perspective view illustrating a state in which a connecting member of a driving side shaft or a driven side shaft is attached to an intermediate member.

10 is an explanatory side view of a main part when a connecting member of a driving side shaft or a driven side shaft is assembled to the intermediate member shown in FIG. 9;

11 is an explanatory plan view of a main part when a connecting member of a drive side shaft or a driven side shaft is assembled to the intermediate member shown in FIG. 9;

FIG. 12 is an external perspective view showing an example of a known universal shaft joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Universal shaft joint 11 Drive side shaft 12 Follower side shaft 13, 14 Connection member 13a, 14a Bearing part 13b, 14b Connection piece 13c, 14c Curved surface 15 Intermediate member 16 Contact surface 17 Support piece 18 Inclined surface

Claims (2)

(57) [Claims] 1. A universal joint in which a drive side shaft and a driven side shaft forming a predetermined angle range are connected to each other via an intermediate member by a connecting member so that power can be transmitted.
The driving-side and driven-side connecting members are respectively a cylindrical bearing portion that connects the driving-side shaft and the driven-side shaft, and the bearing portion has a central shaft that penetrates the bearing portion in the axial direction. Point symmetry
And a pair of connecting pieces projecting from the said pair of connecting pieces formed a portion facing each other, each drive-side shaft, the inner wall surface shape of a cylinder about an axis perpendicular to the driven side shaft On the other hand, the intermediate member has a support surface formed by a pair of connecting pieces of both connecting members so that the intermediate member sandwiches the curved surface of the pair of connecting pieces and slidably abuts. And a pair of connecting pieces of the two connecting members are assembled to these supporting pieces from one direction, and a contact surface of the pair of connecting pieces is engaged with a contact surface of the supporting piece. A universal shaft joint characterized in that an inclined surface is formed to face a contact surface. 2. The universal shaft coupling according to claim 1, wherein at least the intermediate member is constituted by a self-lubricating member.