JPH066283Y2 - Sliding universal joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tripod type slide type constant velocity universal joint mainly applied to vehicles.

(Prior Art) Conventionally, as disclosed in Japanese Patent Publication No. 57-13211, as shown in FIG. 1, an outer member b having a plurality of axial guide grooves a;
An inner member d provided with a plurality of radial pots c projecting therefrom, and each pot c is engaged with each guide groove a through each outer roller e fitted to the pot so as to swing. Universal joints are known.

(Problems to be Solved by the Invention) In the above conventional technique, the outer member b and the inner member d are arranged.
When power is transmitted in a state where both axes intersect each other obliquely, there is a relationship in which each pot c obliquely intersects each guide groove a. Therefore, each outer roller e is fitted to each pot c so that it can swing. The outer rollers e are allowed to roll in a posture parallel to the respective guide grooves a, but the outer rollers e are in line contact with the respective guide grooves a, and there is a clearance for rolling so that each guide groove a. Since the outer roller e fitted in the a is smaller in tilting frictional force of each outer roller e in the longitudinal direction of each guide groove a than the swinging frictional force of each outer roller e in each pot c, each outer roller e is in each guide groove. It is not preferable because each outer roller e does not roll properly in each guide groove a, because it tends to tilt in the longitudinal direction (direction indicated by the arrow in FIG. 1) with respect to a, causing power loss, vibration and the like.

An object of the present invention is to provide a universal joint that solves such problems.

(Means for Solving the Problems) In order to achieve such an object, the present invention comprises an outer member having a plurality of axial guide grooves and an inner member having a plurality of radial pots projecting therefrom. In a case in which each of the pots is engaged with each of the guide grooves via each of the outer rollers fitted so as to be swingable therein, each of the outer rollers is mounted from the lateral side of the groove in the groove width direction. A guide member is provided for each pot, which is capable of swinging together with each outer roller and movable in the longitudinal direction of each guide groove together with each outer roller, and the guide member is slidably contacted with the outer member to guide the guide member. It is characterized in that a tilt restricting portion extending in the longitudinal direction of the guide groove for preventing tilting of the groove in the longitudinal direction is formed.

(Operation) The tilting force of the guide member in the longitudinal direction of the guide groove is received with a sufficient span by the tilt restricting portion extending in the longitudinal direction, the tilting of the guide member is reliably prevented, and the outer roller is guided by the guide member. The swinging operation is performed while being kept in a posture parallel to the guide groove with respect to the pot, and is properly rolled along the guide groove without tilting in the longitudinal direction thereof.

Moreover, since the guide member can swing with the outer roller with respect to the pot and move with the roller in the longitudinal direction of the guide groove, the movement of the outer roller with respect to the pot and the outer member is not impaired. Further, a guide member can be attached to the outer roller from the side while the outer roller is attached to the inner member, and the slide universal joint of the present invention can be installed without removing the outer roller from the inner member of the existing slide universal joint once and reassembling it. It can be used as the inner member of.

(Example) In the drawings, (1) shows a cylindrical outer member, (2) shows the inner member inside, the outer member (2) is a guide groove (3) long in the axial direction at equal intervals. The inner member (2) is provided with three radially projecting pots (4), and each pot (4) has an inner roller (5) having a spherical outer surface. ) Is slidably inserted in the axial direction of the pot (4), each holder (6) which makes spherical contact with the inner roller (5) is provided on the outer circumference of each inner roller (5), and the needle is provided on the outer circumference of each holder (6). Each outer roller (8) is provided via a bearing (7), each outer roller (8) is rotatable with respect to each pot (4), and swingable via each holder (6). The pots (4) are slidable in the axial direction via the inner rollers (5), and the pots (4) are engaged with the guide grooves (3) via the outer rollers (8). .

Although the above is not particularly different from the conventional one, according to the present invention, it is possible to swing together with each outer roller (8) for each pot (4), and the length of each guide groove (3) together with each outer roller (8). A guide member (9) movable in the direction is provided, and the guide member (9) is slidably contacted with the outer member (1) to prevent the guide member (9) from tilting in the longitudinal direction of the guide groove (3). Yes, the guide groove (3)
A tilt restricting portion (10) extending in the longitudinal direction of is formed.

2 to 4, the guide member (9) has a guide groove.
(3) A rectangular parallelepiped shape having a cross-sectional shape that substantially matches (3), and insert this into both sides of the guide groove (3).
By inserting the peripheral surface portion of the outer roller (8) into the transparent window (9a) formed in the central part of (9), the guide member (9) can swing with the outer roller (8) with respect to the pot (4). Moreover, the guide member (9) is adapted to be moved together with the outer roller (8) in the longitudinal direction of the guide groove (3), and is in sliding contact with the groove wall surfaces (3a) (3a) inside and outside the guide groove (3) in the radial direction. The outer surface of () is used as the tilt control section (10).

Further, FIG. 5 shows a modified example, in which a step surface (1a) extending in the longitudinal direction is formed at the radially inner end of each guide groove (3) of the outer case (1) and each guide is formed. The member (9) is provided with a projecting piece that is in sliding contact with the step surface (1a), and the projecting piece is used for the tilt regulating portion (1
0), and FIG. 6 shows still another modified example, in which each guide member (9) has an inner peripheral surface (in the vicinity of the inner end of each guide groove (3) of the outer member (1) ( A protrusion that slidably contacts 1b) was provided, and this protrusion was used as the tilt regulating portion (10).

In the embodiment, the present invention is applied to a universal joint in which each outer roller (8) has a cylindrical shape and each guide groove (3) has a groove shape substantially conforming to this, but the invention is not limited to this, and each outer roller (8) is 8) may be used as a spherical roller, and each guide groove (3) may be applied to a universal joint formed in a groove shape that approximately conforms to these, and each pot (4) may be in spherical contact with the outer circumference of the inner roller (5). The present invention may be applied to a universal joint in which it is engaged with the guide groove (3) via the outer roller (8) having the inner peripheral surface.

Next, to explain the operation of the embodiment, the outer member (1) and the inner member (2) rotate at the time of rotation of one of the outer member (1) and the inner member (2). Power transmission is not particularly different from the conventional one, but when both members (1) and (2) transmit power with their axes oblique to each other,
According to the present invention, the guide member (9) is provided by the tilting restricting portion (10).
Since the tilting of the guide groove (3) in the longitudinal direction is prevented, the outer roller (8) is guided by the guide member (9) and the pot 4
On the other hand, the swinging operation is always performed while keeping the posture parallel to the guide groove (3), and the guide groove (3) is properly rolled without tilting in the longitudinal direction thereof.

In addition, the guide member (9) is installed on the outer roller (8) with respect to the pot (4).
Since it can be swung together and moves with the outer roller (8) in the longitudinal direction of the guide groove (3), the movement of the outer roller (8) with respect to the pot (4) and the outer member (1) is not impaired.

(Effects of the Invention) As described above, according to the present invention, the guide member can prevent tilting of each roller with respect to each guide groove in the longitudinal direction, so that power is transmitted in a state where the outer member and the inner member are bent. It is possible to reliably prevent power loss, vibration, etc. due to the outer roller not rolling properly in the guide groove when performing the sliding operation.In addition, the slide of the present invention can be mounted with the outer roller assembled to the inner member of the existing slide type universal joint. It can be used as an inner member of a universal joint, which is advantageous in modifying the joint.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a conventional example, FIG. 2 is a front view of a universal joint having a guide member of the present invention, and FIG.
-III line cutting sectional view, FIG. 4 is a perspective view of the guide member, FIG.
FIG. 6 and FIG. 6 are front views of main parts showing respective modified examples. (1) ... Outer member (2) ... Inner member (3) ... Guide groove (4) ... Pot (8) ... Outer roller (9) ... Guide member (10) ... Tilt restriction section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeo Kurita 1-4-1 Chuo, Wako-shi, Saitama, Honda R & D Co., Ltd. (56) Reference JP-A-63-195421 (JP, A) JP 61-286613 (JP, A) Actual public 59-29151 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. An outer roller having an outer member having a plurality of axial guide grooves and an inner member having a plurality of radial pots projecting therefrom, each of the pots being swingably fitted to the outer roller. In which each outer roller is engaged with each of the guide grooves via a groove, the outer roller being mounted on the outer roller from the lateral side of the groove in the groove width direction, the outer roller being capable of swinging together with the outer roller with respect to the pot. Along with this, a guide member that is movable in the longitudinal direction of each of the guide grooves is provided, and the guide member is slidably contacted with the outer member to prevent the guide member from tilting in the longitudinal direction of the guide groove. A slidable universal joint characterized in that a tilt restricting portion extending in the direction is formed.