WO2017077832A1

WO2017077832A1 - Ball joint

Info

Publication number: WO2017077832A1
Application number: PCT/JP2016/080304
Authority: WO
Inventors: 靖博佐藤
Original assignee: 株式会社ソミック石川
Priority date: 2015-11-06
Filing date: 2016-10-13
Publication date: 2017-05-11
Also published as: JP2017089718A; CN108138834A; JP6941334B2

Abstract

Provided is a ball joint configured so that the structure thereof will be simplified to facilitate assembly work and so that pressing force for pressing a ball section can be easily changed. A ball joint 120 is provided with a ball stud 130. The ball stud 130 is provided with a ball section 133 located at the front end of a shaft-like stud section 131. The ball section 133 is retained in the housing section 152 of a housing 150 while being covered with a ball seat 140 composed of a first ball seat 141 and a second ball seat 142, which respectively cover each of the hemispheres of the ball section 133. The housing section 152 has a shape of a closed-end cylinder, and an elastic body 160 is provided on a receiving section 153 which is the bottom of the housing section 152. The housing 150 has a housing thread section 154 formed on the outer peripheral surface of a protrusion 151 which forms a part of the housing section 152 for housing the ball seat 140. A pressing body 170 is fitted through threads to the housing thread section 154 while the pressing body 170 presses the first ball seat 141.

Description

Ball joint

The present invention relates to a ball joint that slidably supports a spherical ball portion formed at the tip of a shaft-shaped stud portion through a ball seat in a housing.

Conventionally, there is a ball joint configured to slidably support a spherical ball portion formed at the tip of a shaft-shaped stud portion through a ball seat in a housing. For example, in Patent Document 1 below, a spacer is provided for a receiving member that covers a spherical member as a ball portion, and a movable member that contacts the spacer via an inclined surface is slid to displace the spacer toward the spherical member. Disclosed is a ball joint that presses a receiving member against a spherical member by displacement to prevent the spherical member from rattling.

JP 09-72331 A

However, in the ball joint described in Patent Document 1, a spherical member is formed by a receiving member by slidingly moving a movable member by rotating a screw shaft made of a set screw (a so-called immo screw) that is screw-fitted to the side surface of the housing. Therefore, there is a problem that it is difficult to frequently change the pressing force of the spherical member. Further, in the above ball joint, since a recess is formed in the spacer in order to insert the tip end portion of the screw shaft into the movable member, a dedicated tool to be inserted into this recess is required. There is also the problem of being complicated and cumbersome.

The present invention has been made to address the above problems, and an object thereof is to provide a ball joint that simplifies the configuration, facilitates assembly work, and can easily change the pressing force for pressing the ball portion. It is in.

In order to achieve the above object, the present invention is characterized by a ball stud in which a ball portion having a spherical surface is formed at the tip of a shaft-shaped stud portion and a hemispherical surface of the ball portion. A first ball sheet that covers the first ball sheet with a gap therebetween, and a second ball sheet that covers the other hemispherical surface of the ball portion in a slidable state with respect to the first ball sheet, A pressing body that presses one of the ball sheet and the second ball sheet toward the other side; a receiving portion that receives the second ball sheet or the first ball sheet on the other side that is not pressed by the pressing body; A housing that accommodates the one ball sheet and the second ball sheet, and between the pressing body and the first ball sheet or the second ball sheet, and the first ball sheet or the second ball sheet. An elastic body provided in at least one of the space between the flange and the housing, and the housing has a housing screw portion that is screwed into the pressing body along the pressing direction of the pressing body. In addition to having a pressing body screw portion that is screw-fitted to the screw portion, a handle portion for rotating the pressing body screw portion by hand is provided outside the pressing body screw portion.

In this case, the housing is configured to receive the first ball sheet and the second ball sheet while having a receiving portion for receiving the second ball sheet or the first ball sheet on the other side that is not pressed by the pressing body. Good. Moreover, the 1st ball seat and the 2nd ball seat should just be comprised so that at least one part in each hemisphere of a ball | bowl part may be covered.

According to the feature of the present invention configured as described above, the ball joint is formed on the outer peripheral portion of the housing that accommodates the ball portion and the ball seat, respectively, with the pressing body on which the handle portion for turning is manually operated. Therefore, the pressing force for pressing the ball portion can be easily changed, and the configuration of the ball joint can be simplified to facilitate the assembling work.

Another feature of the present invention is that the ball joint further includes a stopper that regulates the displacement of the pressing body in order to limit the pressing force of the elastic body by the pressing body.

According to another feature of the present invention configured as described above, the ball joint is damaged by an excessive pressing force acting on the elastic body because the displacement position of the pressing body toward the elastic member is defined by the stopper. Thus, the wide adjustment range of the sliding resistance of the ball portion with respect to the first ball sheet and the second ball sheet can be maintained for a long time.

Another feature of the present invention is that, in the ball joint, the pressing body presses the first ball seat or the second ball seat at a position disengaged from the ball portion.

According to another feature of the present invention configured as described above, the ball joint presses the first ball seat or the second ball seat at a position where the pressing body is disengaged from the ball portion, and the pressing force is the first ball seat. Alternatively, since it does not act directly on the second ball sheet, the adjustment range of the sliding resistance of the ball part with respect to the first ball sheet and the second ball sheet is adjusted so that the pressing body moves the first ball sheet or the second ball sheet from the position on the ball part. Compared to the case of pressing, it can be secured in a wide range. In this case, the position where the pressing body deviates from the ball portion that presses the first ball sheet or the second ball sheet means that the ball portion is on the pressing direction in which the pressing body presses the first ball sheet or the second ball sheet. It is a position that does not exist.

Further, another feature of the present invention is that, in the ball joint, the pressing body is provided on the radially outer side of the ball stud.

According to another feature of the present invention configured as described above, the ball joint is provided with the pressing body on the radially outer side of the ball stud, so that the pressing body is provided on the tip end side of the ball portion. Thus, the length of the ball joint can be shortened, and when the user operates the ball stud side, the pressing member can be easily rotated.

According to another aspect of the present invention, in the ball joint, the pressing body includes a handle portion that is a separate body from the pressing body in which the pressing body screw portion is formed, and is detachable from the pressing body. That is to be formed.

According to another feature of the present invention configured as described above, the ball joint is configured such that the handle portion of the pressing body is formed separately from the pressing body in which the pressing body screw portion is formed and Since it is formed so as to be detachable, users who can rotate the pressing body can be limited by removing the handle portion from the portion where the screw portion is formed.

It is sectional drawing which shows schematically the structure of the rehabilitation instrument provided with the ball joint which concerns on one Embodiment of this invention. It is sectional drawing which shows roughly the structure of the rehabilitation instrument provided with the ball joint which concerns on the modification of this invention. It is sectional drawing which shows schematically the structure of the rehabilitation instrument provided with the ball joint which concerns on the other modification of this invention.

Hereinafter, an embodiment of a ball joint according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing an outline of a configuration of a rehabilitation instrument 100 including a ball joint 120 according to the present invention. In addition, each figure referred in this specification has the part typically expressed, such as exaggerating and showing a one part component, in order to make an understanding of this invention easy. For this reason, the dimension, ratio, etc. between each component may differ. The rehabilitation device 100 is a device used by a physically disabled person who cannot move his / her hand or arm as he / she wants to restore the function of the hand / arm by tilting the operation rod 110.

The rehabilitation instrument 100 mainly includes an operation rod 110, a ball joint 120, and a support base 180. The operation rod 110 is a component that is manually operated by a user (handicapped person) who uses the rehabilitation device 100, and is configured by forming a metal material or a resin material into a bar shape extending in the vertical direction.

The operating rod 110 is provided with a gripping portion 111 on the upper side (the upper side in the drawing), and a lower end portion (the lower side in the drawing) is connected to the ball stud 130 in the ball joint 120. The grip portion 111 is a portion that is held by a user who performs rehabilitation using the rehabilitation device 100, and is configured to be formed in a cylindrical shape with a thickness that allows a person to grip the resin material. The operation rod 110 is formed to have a length (for example, 100 mm to 1000 mm) according to the posture of the user who performs rehabilitation (rehabilitation) (for example, a standing state or a seated state on a chair).

The ball joint 120 mainly includes a ball stud 130, a ball seat 140, a housing 150, an elastic body 160, and a pressing body 170. Among these, the ball stud 130 is made of a steel material, and is formed in a substantially spherical shape via a constricted portion 132 on one end side (downward in the drawing) of the stud portion 131 formed in a shaft shape. A portion 133 is provided.

The stud portion 131 is a portion for connecting the ball joint 120 to the lower end portion of the operation rod 110. The stud portion 131 is connected to the operation rod 110 through a screw portion (not shown) formed at the end opposite to the ball portion 133. It is connected. On the other hand, the ball portion 133 is a portion that slides in the ball seat 140 as a bearing seat, and is formed in a smooth convex spherical shape so as to slide smoothly with respect to the inner peripheral surface of the ball seat 140. ing.

The ball sheet 140 is a component that slidably holds the ball portion 133 of the ball stud 130, and is configured by forming a resin material into a cylindrical shape. In this case, the ball sheet 140 has a spherical surface whose inner peripheral surface corresponds to the ball portion 133 and an outer peripheral surface formed on a circumferential surface that fits into an inner peripheral surface of the accommodating portion 152 described later. . Examples of the synthetic resin material constituting the ball sheet 140 include polyether ether ketone resin (PEEK), polyimide resin (PI), polyacetal resin (POM), polyvinyl chloride resin (PVC), and polyurethane resin (PUR). Polycarbonate resin (PC), polystyrene resin (PS), nylon resin (PA-6T, 9T) or polypropylene (PP).

The ball sheet 140 mainly includes a first ball sheet 141 and a second ball sheet 142. The first ball seat 141 is a ring shape that annularly covers a part on the stud portion 131 side from the vicinity of the equator portion 133a (in the present embodiment, slightly below the equator portion 133a) that is the central portion of the ball portion 133 in the vertical direction. Is formed. In FIG. 1, the equator portion 133a is indicated by a two-dot chain line.

In addition, the second ball seat 142 is located near the equator portion 133a (slightly below the equator portion in the present embodiment) near the tip portion side of the ball portion 133, which is the center of the sphere constituting the ball portion 133 in the vertical direction. It is formed in a ring shape that partially covers the ring. The second ball sheet 142 is formed with a stopper 143 in which the inner part of the lower end surface protrudes downward.

The stopper 143 is a part for protecting the elastic body 160 by restricting the displacement of the pressing body 170, which will be described later, toward the elastic body 160, and is accommodated when the elastic body 160 is compressed and deformed to a predetermined thickness. It is formed with an overhang amount that strikes the bottom of the portion 152. In the present embodiment, the stopper 143 is formed in a ring shape with an overhang amount that abuts against the bottom of the housing portion 152 when the thickness of the elastic body 160 becomes 2/3 of the original thickness that is not compressed. ing.

Further, the ball sheet 140 is formed on the outer peripheral surface of the ball portion 133 to have a thickness such that the first ball sheet 141 and the second ball sheet 142 do not contact each other. That is, in the ball sheet 140, a gap is formed between the first ball sheet 141 and the second ball sheet 142 in the vicinity of the equator portion 133 a on the outer peripheral surface of the ball portion 133.

The housing 150 is a component that receives and holds the ball portion 133 of the ball stud 130 via the ball seat 140 and is attached with the pressing body 170. The housing 150 is made of a metal material such as a non-ferrous metal or a steel material in a disc shape in plan view. Formed and configured. The housing 150 is formed with a protruding portion 151 whose central portion protrudes upward. The protruding portion 151 is a cylindrical portion that holds the ball sheet 140 and the pressing body 170, and the housing portion 152 is formed on the inner portion and the housing screw portion 154 is formed on the outer peripheral surface.

The accommodating portion 152 is a portion that accommodates and holds the ball portion 133 in the ball stud 130 via the ball seat 140, and one end (the upper side in the drawing) is open and the other end (the lower side in the drawing) is the end side. It is formed in a closed bottomed cylindrical shape. In this case, an elastic body 160 is provided between the lower surface of the second ball seat 142 on the receiving portion 153 that is the bottom of the housing portion 152. In addition, the accommodating portion 152 is formed to have a depth at which the upper end portion of the ball sheet 140 protrudes from the upper end portion of the protruding portion 151, and has an inner diameter that allows the ball sheet 140 to slide in the vertical direction.

The housing screw portion 154 is a portion into which the pressing body screw portion 171b of the pressing body 170 is screwed, and is configured by a male screw that is screwed into the pressing body screw portion. Further, the outer edge portion of the housing 150 is formed one step lower than the base end portion of the protruding portion 151 and is attached to the support base 180 via bolts 155.

The elastic body 160 is a component for absorbing a part of the pressing force by the pressing body 170 and weakening the pressing force on the ball sheet 140, and a rubber material (in this embodiment, hard rubber) is formed in a flat ring shape. Configured. More specifically, the elastic body 160 is formed so that the inner diameter is larger than the outer diameter of the second ball seat 142 and the inner diameter is smaller than the inner diameter of the accommodating portion 152.

The pressing body 170 is a ring-shaped component for pressing the ball seat 140 held in the housing 150, and mainly includes a pressing main body 171 and a handle portion 173. The pressing main body 171 is a component that presses the ball seat 140 by screwing into the housing 150, and is configured by forming a metal material such as a non-ferrous metal or a steel material into a ring shape in plan view.

The pressing main body 171 mainly includes a pressing portion 171a, a pressing body screw portion 171b, and a handle mounting portion 171c. The pressing portion 171a is a portion that presses the first ball sheet 141, and is constituted by a lower surface adjacent to the inner peripheral portion of the pressing main body 171 formed in a ring shape. In this case, the pressing portion 171a is formed to press the first ball sheet 141 at a position that does not cover the ball portion 133 in plan view. Further, the upper surface of the pressing portion 171a outside the pressing portion 171a is formed in a funnel shape that widens upward from the inner peripheral side, and ensures a wide tilt range of the ball stud 130.

The pressing body screw portion 171 b is a portion that is screwed into the housing screw portion 154 formed on the outer peripheral surface of the protruding portion 151 of the housing 150, and is configured by a female screw that is screwed into the housing screw portion 154. The handle attachment portion 171c is a portion to which the handle portion 173 is detachably attached by a bolt 172, and is formed in a flat ring shape on the outer edge portion of the pressing body 171.

The handle portion 173 is a portion that is held by the user in order to rotate the pressing body 171 and is configured by forming a resin material in a ring shape in plan view. The handle portion 173 is detachably attached to the upper surface of the pressing main body 171 through bolts 172 in a state where the handle portion 173 is suspended from the upper surface to the side surface.

The support base 180 is a component that supports the ball joint 120, and is configured by forming a metal material such as a non-ferrous metal or a steel material into a disk shape in plan view. In the present embodiment, the support base 180 is made of a steel plate in order to further ensure the stability of the rehabilitation device 100.

(Assembly of rehabilitation device 100)
Here, the assembly work of the rehabilitation instrument 100 will be described. An operator who performs assembly work of the rehabilitation instrument 100 first prepares the support base 180, the housing 150, the ball seat 140, the elastic body 160, and the pressing body 170, respectively. Next, the operator places the housing 150 on the support base 180 and attaches the housing 150 onto the support base 180 using the bolts 155.

Next, the worker places the elastic body 160 on the receiving portion 153 in the housing portion 152 of the housing 150 and then places the second ball sheet 142 on the elastic body 160 in the housing portion 152. Next, the worker arranges the ball part 133 in the ball stud 130 on the second ball sheet 142 in the accommodating part 152, and then arranges the first ball sheet 141 on the ball part 133 in the accommodating part 152. In this case, the operator can place the first ball sheet 141 on the ball part 133 by passing the first ball sheet 141 from the stud part 131 side of the ball stud 130.

Next, the operator arranges the pressing body 170 on the first ball sheet 141 on the ball portion 133. In this case, the operator can place the pressing body 170 on the first ball sheet 141 by passing the pressing body 170 from the stud 131 side of the ball stud 130. The operator can complete the ball joint 120 by screwing the pressing body screw portion 171b of the pressing body 170 into the housing screw portion 154 of the housing 150.

Next, the operator prepares the operation rod 110 and attaches the operation rod 110 to the upper end portion of the ball stud 130 in the ball joint 120. Thereby, the operator can assemble the rehabilitation instrument 100.

(Operation of the rehabilitation device 100)
Next, the operation of the rehabilitation instrument 100 configured as described above will be described. A user who uses the rehabilitation device 100 (rehabilitation person or trainer) prepares the rehabilitation device 100 and is placed on a floor or a desk. Next, the user sets the tilt hardness, which is a force necessary for tilting the operation rod 110 with respect to the rehabilitation instrument 100.

Specifically, the user adjusts the screwing amount of the pressing body screw portion 171b with respect to the housing screw portion 154 by gripping and rotating the handle portion 173 of the pressing body 170 in the rehabilitation instrument 100. For example, the user can increase the tilting hardness of the operation rod 110 by rotating the pressing body 170 and screwing it into the housing 150 side. In this case, the pressing force acting on the first ball sheet 141 acts on the receiving portion 153 via the ball portion 133, the second ball seat 142 and the elastic body 160.

As a result, the rehabilitation device 100 increases the tilting hardness of the operation rod 110 because the clamping force (sliding resistance) by the first ball sheet 141 and the second ball sheet 142 with respect to the ball portion 133 in the ball stud 130 increases. Can do. In this case, since a part of the pressing force transmitted to the elastic body 160 is consumed for compressive deformation of the elastic body 160, the holding force with respect to the ball portion 133 is prevented from increasing rapidly, and the operation rod 110 is prevented. It is easy to make a fine adjustment of the tilt hardness of the.

Further, in the rehabilitation device 100, when the user continuously rotates the pressing body 170 and continues to be screwed into the housing 150, the stopper 143 provided on the lower surface of the second ball seat 142 hits the receiving portion 153. Thereby, the rehabilitation instrument 100 can prevent the elastic body 160 from being damaged by preventing excessive compression deformation of the elastic body 160.

On the other hand, the user can reduce the tilting hardness of the operating rod 110 by rotating the pressing body 170 to reduce the screwing amount into the housing 150. In this case, the rehabilitation device 100 reduces the tilting hardness of the operating rod 110 because the clamping force (sliding resistance) by the first ball sheet 141 and the second ball sheet 142 with respect to the ball portion 133 in the ball stud 130 is reduced. be able to. In this case, since a part of the pressing force transmitted to the elastic body 160 is consumed for eliminating the compressive deformation of the elastic body 160, the holding force with respect to the ball portion 133 is prevented from rapidly decreasing, and the operation Subtle adjustment of the tilting hardness of the rod 110 is facilitated. Therefore, the user can adjust the tilting hardness of the operating rod 110 to a desired hardness by rotating the pressing body 170.

Next, the user performs rehabilitation using the rehabilitation device 100. Specifically, the user freely tilts the operation rod 110 in the front-rear and left-right directions around the ball portion 133 by gripping the grip portion 111 of the operation rod 110 and moving the arm. In this case, the user can also rotate and slide the operation rod 110 around the axis around the central axis of the ball stud 130. Thereby, the rehabilitation instrument 100 can give the user an operation load corresponding to the tilt hardness set for the operation rod 110.

In addition, when the tilting hardness of the operating rod 110 is excessive or insufficient, the user appropriately adjusts the tilting hardness of the operating rod 110 to a desired hardness by rotating the pressing body 170 in the same manner as described above. Can be changed. Even in this case, the user can easily change the tilting hardness of the operation rod 110 because the pressing body 170 is exposed to the outside of the housing 150 so as to be rotatable.

When the user wants to end the use of the rehabilitation device 100 or to fix the tilting posture of the operation rod 110, the user rotates the pressing body 170 so as to be screwed more strongly into the housing 150, thereby moving the ball portion 133 to the ball. The state in which the sheet 140 is more strongly clamped and cannot be rotated, that is, the operation rod 110 cannot be tilted and operated. Further, when a person who performs rehabilitation or a person who manages rehabilitation wants to prevent the tilt hardness of the operation rod 110 from being changed by another person, the handle portion 173 is removed from the pressing body 171 of the pressing body 170. It can also be removed.

As can be understood from the above description of the operation method, according to the above embodiment, the ball joint 120 is configured such that the pressing member 170 formed with the handle portion 173 for manual rotation is formed with the ball portion 133 and the ball seat 140. Since the ball seat 140 is screw-fitted to the outer peripheral portion of the housing 150 for accommodating the ball portion 140, the pressing force for pressing the ball portion 133 can be easily changed, and the configuration of the ball joint 120 is simplified and assembled. Work can be facilitated.

Furthermore, the implementation of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the object of the present invention. In the following modifications, the same reference numerals are given to the same components as those in the above embodiment, and the description thereof is omitted.

For example, in the above embodiment, the elastic body 160 is made of a rubber material. However, the elastic body 160 may be made of a material that is elastically deformed by the pressing force generated by the pressing body 170. Therefore, the elastic body 160 can be formed of a material other than a rubber material, for example, a resin material such as urethane resin, a coil spring, and a spring washer, or a combination thereof.

Further, in the above embodiment, the elastic body 160 is disposed between the second ball sheet 142 and the receiving portion 153. However, the elastic body 160 should just be provided between the press part 171a and the receiving part 153 in the press body 170, and is not necessarily limited to the said embodiment. Therefore, the elastic body 160 can also be provided between the press part 171a and the 1st ball seat 141 in the press body 170, for example, as shown in FIG.

In the above embodiment, the receiving portion 153 is configured by the bottom portion of the housing 150. However, the receiving part 153 may be configured to receive the pressing force generated by the pressing body 170, and is not necessarily limited to the above embodiment. Therefore, for example, as shown in FIG. 3, the housing portion 152 in the housing 150 is formed in a through-hole shape, and the receiving portion 181 is formed on the support base 180 facing the housing portion 152 in the through-hole shape. it can.

Further, in the above embodiment, the housing screw portion 154 is constituted by a male screw, and the pressing body screw portion 171b is constituted by a female screw. However, for example, as shown in FIG. 2, it is natural that the housing screw portion 154 can be constituted by a female screw and the pressing body screw portion 171b can be constituted by a male screw. In the rehabilitation instrument 100 shown in FIG. 2, the protruding portion 151 has only the housing screw portion 154 and does not form the accommodating portion 152, and is opposite to the pressing body screw portion 171 b in the pressing body 171 in the pressing body 170. The side surface forms part of the accommodating portion 152.

In the above embodiment, the pressing body 170 is configured such that the handle portion 173 is detachable from the pressing body 171. Thereby, the rehabilitation instrument 100 can prevent the change of the tilting hardness of the operation rod 110 which is not desired by the person who performs rehabilitation or the person who manages rehabilitation by removing the handle portion 173 from the pressing body 171. it can. However, it is natural that the pressing body 170 can be configured by integrally forming the pressing body 171 and the handle portion 173.

In the above embodiment, the stopper 143 is provided on the lower surface of the second ball sheet 142. However, the stopper 143 is not necessarily limited to the above embodiment as long as it can define the limit position of the displacement of the pressing body 170 toward the elastic body. Therefore, the stopper 143 can be provided at a place other than the second ball sheet 142, for example, the first ball sheet 141, the housing 150, or the pressing body 170. 2 shows an example in which a convex stopper 156 is formed on the housing 150 facing the lower side of the pressing body screw portion 171b in the pressing body 171 of the pressing body 170. Further, the stopper 143 can be omitted when protection of the elastic body 160 is unnecessary.

In the above embodiment, the pressing portion 171a of the pressing body 170 is formed at a position that does not cover the ball portion 133. Thereby, in the rehabilitation device 100, since the pressing force generated from the pressing body 170 does not directly act on the ball portion 133, the change in the force with which the ball seat 140 holds the ball portion 133 can be moderated, and the tilt hardness is adjusted. Can be made easier. In this case, the pressing part 171a may be a position where the ball part 133 does not exist in the pressing direction for pressing the first ball sheet 141 or the second ball sheet 142. However, it is not excluded that the pressing portion 171a is provided at a position where the ball portion 133 exists in the pressing direction in which the first ball sheet 141 or the second ball sheet 142 is pressed.

Further, in the above embodiment, the pressing body 170 is disposed on the radially outer side of the constricted portion 132 in the ball stud 130. As a result, the user can easily grip and rotate the handle portion 173. However, when the housing 150 on the tip end side of the ball portion 133 is exposed to the outside, such as a tie rod end or a rack end in a steering mechanism or a suspension mechanism in a self-propelled vehicle, the pressing body 170 is in the housing 150. It can also be provided at the tip side portion of the ball portion 133.

In the above embodiment, an example in which the ball joint 120 is applied to the rehabilitation device 100 has been described. However, the ball joint 120 according to the present invention can be widely used in instruments or mechanical devices other than the rehabilitation instrument 100. For example, the ball joint 120 includes a training device that tilts the operating rod 110, an input device such as a joystick that includes a sensor that detects the tilted state of the operating rod 110, a control rod of a mechanical device, and a connecting part of a movable part in a desk lamp. Or it can use widely as a connection component of the movable part of a room mirror.

100 ... rehabilitation equipment,
110 ... operation rod, 111 ... gripping part,
120 ... Ball joint,
130 ... Ball stud, 131 ... Stud part, 132 · · Constriction part, 133 ... Ball part, 133a ... Equatorial part,
140: Ball sheet, 141: First ball sheet, 142: Second ball sheet, 143: Stopper,
150 ... housing, 151 ... projecting part, 152 ... accommodating part, 153 ... receiving part, 154 ... housing screw part, 155 ... bolt, 156 ... stopper,
160 ... an elastic body,
170 ... Pressing body, 171 ... Pressing body, 171a ... Pressing portion, 171b ... Pressing body screw portion, 171c ... Handle mounting portion, 172 ... Bolt, 173 ... Handling portion,
180 ... support base, 181 ... receiving portion.

Claims

A ball stud in which a ball portion having a spherical surface is formed at the tip of the stud portion formed in an axial shape;
A first ball seat covering the hemispherical surface of the ball portion in a slidable state;
A second ball sheet that is arranged with a gap with respect to the first ball sheet and covers the other hemispherical surface of the ball portion in a slidable state;
A pressing body for pressing one of the first ball sheet and the second ball sheet toward the other side;
A receiving portion for receiving the second ball sheet or the first ball sheet on the other side not pressed by the pressing body;
A housing for housing the first ball seat and the second ball seat;
An elastic body provided between at least one of the pressing body and the first ball sheet or the second ball sheet and between the first ball sheet or the second ball sheet and the receiving portion. ,
The housing is
Having a housing screw part screwed to the pressing body along the pressing direction of the pressing body;
The pressing body is
A ball joint comprising: a pressing body screw portion that is screw-fitted to the housing screw portion; and a handle portion for rotating the pressing body screw portion manually by the outside of the pressing body screw portion.
The ball joint according to claim 1, further comprising:
A ball joint comprising a stopper that defines a displacement position of the pressing body toward the elastic body.
In the ball joint according to claim 1 or 2,
The pressing body is
A ball joint, wherein the first ball seat or the second ball seat is pressed at a position disengaged from the ball portion.
In the ball joint according to any one of claims 1 to 3,
The ball joint according to claim 1, wherein the pressing body is provided on a radially outer side of the ball stud.
In the ball joint according to any one of claims 1 to 4,
The pressing body is
2. The ball joint according to claim 1, wherein the handle portion is formed separately from the pressing body in which the pressing body screw portion is formed and is detachably formed on the pressing body.