JP2011089617A - Spherical shaft coupling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spherical shaft coupling device capable of preventing rotation in one direction. <P>SOLUTION: The spherical shaft coupling device 1 includes a bearing member 20 interposed between a housing 10 and a spherical shaft 24 disposed concentrically with each other, and the spherical shaft 24 supported rotatably in three-dimensional directions. Both ends of an outer member 11 of the housing 10 are provided with a pair of brackets 41, 41 projecting in the axial direction, and a pair of stoppers 43, 43 are fastened to the pair of brackets 41, 41 by bolts 46. Both brackets 41, 41 are arranged to face a pair of connection parts 26, 26 protrusively provided at the spherical shaft 24. When turning force in a direction of an arrow mark R is applied to the spherical shaft 24, one of the pair of connection parts 26, 26 contacts one of the pair of stoppers 43, 43 to prevent the rotation of the spherical shaft 24 in the direction of the arrow mark R. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a spherical shaft coupling device, and for example, to an effective device that can be used in a support device for an actuator of a vehicle anti-sway device.

  As a vehicle anti-sway device for preventing the lateral shaking of the track vehicle, there is one that includes a gas pressure servo cylinder that generates a force that resists the lateral shaking of the vehicle body. For example, see Patent Document 1.

Japanese Patent Laying-Open No. 2005-075278

By the way, in a vehicle anti-sway device provided with a gas pressure servo cylinder, there are problems such as a delay in vibration control caused by the gas pressure servo cylinder and a large amount of air consumption.
Therefore, a vehicle anti-sway device using a screw (worm gear reduction device) type electric actuator instead of the gas pressure servo cylinder can be proposed.
However, in a vehicle anti-sway device using a screw type electric actuator, a part of the vehicle anti-sway device is displaced by converting the rotation of the electric motor into a linear motion. Can not do it.

  An object of the present invention is to provide a spherical shaft coupling device that can prevent rotation in one direction.

Typical means for solving the above-described problems are as follows.
(1) In a spherical shaft coupling device in which a bearing member is interposed between a concentrically arranged housing and a spherical shaft, and the spherical shaft is rotatably supported in a three-dimensional direction.
A pair of connecting portions project from the spherical axis,
The spherical shaft coupling device, wherein the housing is provided with a pair of stoppers so as to face each of the pair of connecting portions.
(2) In a spherical shaft coupling device in which a bearing member is interposed between a concentrically arranged housing and a spherical shaft, and the spherical shaft is rotatably supported in a three-dimensional direction.
A pair of connecting portions project from the spherical axis,
The spherical shaft coupling device, wherein the housing is provided with a pair of stoppers so as to face one of the pair of connecting portions.

  According to this spherical axis joint device, rotation of the spherical axis in one direction can be prevented.

The spherical shaft coupling apparatus which is 1st embodiment of this invention is shown, and it is front sectional drawing in alignment with the II line | wire of FIG. It is a bottom view similarly. (A) is a left side view, (b) is a right side view. It is front sectional drawing which shows the spherical-axis coupling apparatus which is 2nd embodiment of this invention. It is the left view.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment of the present invention.
In this embodiment, the spherical shaft coupling device according to the present invention is configured as a shaft coupling device that connects the screw type electric actuator of the vehicle anti-sway device to the chassis and the vehicle body, and in principle, ensures a degree of freedom in the three-dimensional direction. Is configured to do.

  As shown in FIGS. 1 to 3, the spherical shaft coupling device 1 according to the present embodiment includes a housing 10 including an outer member and an inner member. The outer member 11 is formed in a cylindrical shape by an iron-based material, and the hollow portion of the outer member 11 is divided into two parts by a stopper portion 12 protruding in a circular ring shape at one end portion of the inner peripheral surface. . One part forms a holding part 13 and the other part forms a boot attachment part 14.

  An inner member 15 formed in a substantially cylindrical shape by an iron-based material is fitted in the holding portion 13 of the outer member 11, and a substantially cylindrical hollow recess portion 16 is formed by the hollow portion of the inner member 15. Has been. A hemispherical concave spherical surface portion 17 is formed at one end portion of the bearing concave portion 16, and a cylindrical inner peripheral surface portion 18 having a cylindrical inner peripheral surface shape is formed at the other end portion of the bearing concave portion 16. On the opposite side of the inner member 15 of the inner member 15 from the cylinder inner peripheral surface portion 18, a boot mounting portion 19 is formed in a cylindrical inner peripheral surface shape having a diameter larger than the inner diameter of the cylinder inner peripheral surface portion 18.

A bearing member 20 is fitted in the bearing recess 16 of the inner member 15, and the bearing member 20 has a grease-filled bearing structure and a spherical bearing structure that are fitted in the bearing recess 16. The bearing member 20 is made of polyacetal resin, polyimide resin, polyetheretherketone resin or the like, and is integrally formed into a spherical hollow body having both ends cut out in parallel with each other. The inner surface constitutes the concave spherical surface portion 21. The concave spherical portion 21 corresponds to a convex spherical portion 25 of a spherical shaft 24 described later, and is formed so as to substantially surround the convex spherical portion 25.
A positioning cylinder 22 is coaxially arranged at one end of the concave spherical surface portion 21 and protrudes outward in the axial direction. A positioning ring 23 is fitted to the outer periphery of the positioning cylinder 22. When the bearing member 20 is fitted into the bearing recess 16 and the inner member 15 is fitted into the outer member 11, the positioning ring 23 abuts against the stopper portion 12 and is positioned.

  The spherical axis 24 includes a convex spherical portion 25 formed in a substantially spherical (ball) shape. A pair of connecting portions 26, 26 project from the convex spherical portion 25 so as to be aligned in a straight line on the extended line of the spherical center of the convex spherical portion 25. Cylindrical neck portions 27 and 27 are formed at connecting portions between the pair of connecting portions 26 and 26 and the convex spherical surface portion 25, respectively, and the outer member 11 is attached to the boot on the outside of the pair of neck portions 27 and 27. The part 14 and the boot mounting part 19 of the inner member 15 are opposed to each other.

A pair of boots 30 and 30 are fitted to the pair of neck portions 27 and 27, respectively. The pair of boots 30 and 30 are mounted between the spherical shaft 24 and the housing 10, that is, the outer member 11 and the inner member 15 so as to cover the convex spherical portion 25.
The boot 30 is formed in a substantially circular ring shape using a flexible material such as rubber or resin, and the boot 30 has an inner mounting portion 31 formed in a circular ring shape on the inner periphery, An outer mounting portion 32 is formed in a cylindrical shape on the outer peripheral edge, and a bellows portion 33 is formed in a cross-section “<” shape in the middle portion. The inner attachment portion 31 is fixed by being wound around the outer periphery with a garter spring 34 in a state of being fitted to the neck portion 27. A cylindrical retainer 35 is fixed to the outer periphery of the outer mounting portion 32 by baking or the like, and the retainer 35 is press-fitted into the boot mounting portion 14 of the outer member 11 or the boot mounting portion 19 of the inner member 15, thereby The attachment portion 32 is fixed to the housing 10.
The boot 30 absorbs the relative displacement between the spherical shaft 24 and the housing 10 when the bellows portion 33 formed in the middle portion of the boot 30 is opened and closed in the radial direction.
Although not shown, the boot 30 is filled with grease.

  A seating surface 28 is formed in each of the pair of connecting portions 26, 26 of the spherical shaft 24, and each fastening hole 29 is formed in each seating surface 28. The spherical shaft 24 is connected to the chassis and the vehicle body by being fastened to the attachment part in the fastening hole 29 in a state where the pair of connection parts 26 and 26 are attached to the chassis or the attachment part (not shown) of the vehicle body. .

A pair of brackets 41, 41 project in the axial direction at both ends of the outer member 11, and a pair of mounting holes 42 are opened in the pair of brackets 41, 41, respectively. A pair of stoppers 43, 43 are arranged and fastened to the pair of brackets 41, 41 so as to face the pair of connecting portions 26, 26, respectively.
The stopper 43 includes a contact member 44 and a female screw member 45 having a pair of female screws. The contact member 44 is formed into a substantially rectangular parallelepiped shape using a resin having mechanical strength such as polyurethane, and a female screw member 45 is insert-molded on one side surface of the contact member 44. A pair of bolts 46, 46 are inserted into the pair of mounting holes 42, 42 in a state where the end surface of the stopper 43 on the female screw member 45 side is in contact with the mounting surface on the connecting portion 26 side of the bracket 41. The stopper 43 is fastened to the bracket 41 by being screwed into the female screw.

  The operation and effect of the spherical shaft coupling device according to the above configuration will be described.

Since the convex spherical portion 25 of the spherical shaft 24 is slidably fitted to the concave spherical portion 21 of the inner member 15, the housing 10 supported by the spherical shaft 24 swings in a three-dimensional direction with respect to the spherical shaft 24. Can move.
When the housing 10 swings with respect to the spherical axis 24, the bellows portion 33 of the boot 30 is opened and closed to absorb relative displacement between the housing 10 and the spherical axis 24. On the other hand, it can swing smoothly without being obstructed by the boot 30.

By the way, in the vehicle anti-sway device, when the screw type electric actuator is connected to the chassis and the vehicle body by the spherical shaft coupling device 1, it is shown by the arrow R in FIG. There is a possibility that the accuracy of the vehicle anti-sway device may be reduced by the rotational force in the direction applied to the spherical shaft 24.
In the present embodiment, when the rotational force R of FIG. 1 is applied, the spherical shaft 24 is prevented from rotating because one of the pair of connecting portions 26, 26 contacts one of the pair of stoppers 43, 43. Thus, it is possible to prevent a phenomenon in which the accuracy of the vehicle shake prevention device is lowered.

On the other hand, since the spherical shaft 24 can rotate with respect to the rotational force indicated by the arrow Θ in FIG. 2, the spherical shaft coupling device 1 can absorb the vibration of the chassis or the vehicle body.
Further, since the housing 10 can rotate with respect to the center line passing through the pair of connecting portions 26, 26 of the spherical shaft 24, the spherical shaft coupling device 1 can permit the expansion and contraction operation of the screw type electric actuator. .

In order to prevent the displacement of the spherical shaft 24 due to the rotational force R, the stopper 43 is preferably formed of an inelastic material such as metal. On the other hand, in order to reduce the impact caused by the collision, the stopper 43 is preferably formed of an elastic material such as a resin such as urethane.
Therefore, in this embodiment, the stopper 43 is formed by insert-molding a metal female screw member 45 into a resin contact member 44 having mechanical strength such as polyurethane.

4 and 5 show a second embodiment of the present invention.
The second embodiment is different from the first embodiment described above in that a pair of stoppers 43 and 43 are arranged so as to face one connecting portion 26 at one end of the outer member 11.
That is, a pair of brackets 41 and 41 are disposed at one end of the outer member 11 with a phase difference of 180 degrees and project in the axial direction, and the pair of brackets 41 and 41 have a pair of stoppers 43 and 43. It arrange | positions so that it may each oppose to the one connection part 26, and is fastened. The pair of stoppers 43, 43 oppose each other with the connecting portion 26 in between in a plane orthogonal to the fastening hole 29 of the connecting portion 26.

  Also in this embodiment, when a rotational force in the direction indicated by the arrow R in FIG. Therefore, the same operation and effect as in the first embodiment can be obtained.

  Needless to say, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, the housing is not limited to an outer member and an inner member.

  In the above embodiment, the case where the rotation direction in the plane orthogonal to the fastening hole (corresponding to the arrow R in FIGS. 1 and 4) is described has been described. However, the rotation in the plane including the center line of the pair of fastening holes The direction (corresponding to the arrow Θ in FIG. 2) may be blocked.

  For example, the spherical shaft coupling device according to the present invention is not limited to use for connecting the screw type electric actuator of the vehicle anti-sway device to the chassis and the vehicle body, but can also be used as another spherical shaft coupling device.

1 ... Spherical shaft coupling device,
DESCRIPTION OF SYMBOLS 10 ... Housing, 11 ... Outer member, 12 ... Stopper part, 13 ... Holding part, 14 ... Boot attachment part, 15 ... Inner member, 16 ... Bearing recessed part, 17 ... Concave spherical surface part, 18 ... Cylindrical inner peripheral surface part, 19 ... Boot mounting part,
DESCRIPTION OF SYMBOLS 20 ... Bearing member, 21 ... Concave spherical surface part, 22 ... Positioning cylinder, 23 ... Positioning ring,
24 ... spherical axis, 25 ... convex spherical portion, 26 ... connecting portion, 27 ... neck portion, 28 ... seat surface, 29 ... fastening hole,
30 ... Boot, 31 ... Inner attachment part, 32 ... Outer attachment part, 33 ... Bellows part, 34 ... Garter spring, 35 ... Retainer,
DESCRIPTION OF SYMBOLS 41 ... Bracket, 42 ... Mounting hole, 43 ... Stopper, 44 ... Contact member, 45 ... Female screw member, 46 ... Bolt.

Claims (2)

In a spherical shaft coupling device in which a bearing member is interposed between a housing and a spherical shaft arranged concentrically with each other, and the spherical shaft is rotatably supported in a three-dimensional direction.
A pair of connecting portions project from the spherical axis,
The spherical shaft coupling device, wherein the housing is provided with a pair of stoppers so as to face each of the pair of connecting portions. In a spherical shaft coupling device in which a bearing member is interposed between a housing and a spherical shaft arranged concentrically with each other, and the spherical shaft is rotatably supported in a three-dimensional direction.
A pair of connecting portions project from the spherical axis,
The spherical shaft coupling device, wherein the housing is provided with a pair of stoppers so as to face one of the pair of connecting portions.

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