JP2007044766A - Ball joint puller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball joint puller which can easily carry out the work for removing a ball joint from a car body side even in a narrow working space in carrying out the maintenance of the car body. <P>SOLUTION: A frame body 21 has abutting portions 24 abutting against a part of a car body equipment having the ball joint 9. An engaging member 28 engaging with a socket portion 11 fitted on the ball joint 9 is provided on the frame body 21. A connecting member 27 having a screw portion 26 is connected to the engaging member 28. An elevating member 32 engaging with the screw portion 26 of the connecting member 27 is provided on the upper surface portion of the frame body 21. The engaging member 28 can move upward and downward by turning the elevating member 32 about the axis of the connecting member 27. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ball joint puller used when removing a ball joint provided on a link rod from the vehicle body side, for example, when maintaining the vehicle body.

  The rear wheel biaxial chassis structure in a vehicle such as a truck is configured as shown in FIGS. That is, 1 indicates a side frame, 2 indicates a rear front shaft (drive shaft), and 3 indicates a rear rear shaft (driven shaft). A propeller shaft 5 is connected to the axle housing 4 of the rear front shaft 2. The axle side bracket 6 and the vehicle body side bracket 7 of the axle housing 4 are connected by a link rod 8.

The link rod 8 is provided with a ball joint 9 at its axial end. As shown in FIG. 6, the ball joint 9 includes a ball stud 10 made of a spherical member and a socket portion 11 that is externally fitted to the ball stud 10, and a synthetic resin is interposed between the ball stud 10 and the socket portion 11. A bearing bush 12 made of metal is interposed. Accordingly, since the socket portion 11 rotates with the center of the ball stud 10 as a fulcrum as the link rod 8 swings, the bearing bush 12 slides and wears, or has a flange that is screwed into the ball stud 10. The nut 18 may loosen.
When maintenance is required due to wear of the bearing bush 12 or the like, the ball joint 9 is removed from the axle side bracket 6 and the bearing bush 12 or the like is replaced. However, the flange portion 14 of the ball stud bracket 13 that supports the ball stud 10 of the ball joint 9 is fixed to the axle side bracket 6 by a plurality of bolts 15. Further, the cylindrical portion 16 provided integrally with the lower surface of the ball stud bracket 13 is inlay-fitted into a recessed portion 17 provided on the axle-side bracket 6 so that the ball stud bracket 13 is positioned and fixed to the axle-side bracket 6. . Reference numeral 18 denotes a flanged nut screwed to the shaft portion of the ball stud 10, and the ball stud 10 and the ball stud bracket 13 are coupled by the flanged nut 18.

  Accordingly, the ball joint 9 can be removed from the vehicle body side by removing the bolt 15 and the ball stud bracket 13 from the axle side bracket 6, but rain water or muddy water enters the inlay fitting portion. The ball stud bracket 13 cannot be removed from the axle side bracket 6 simply by removing the bolts 15 because it is easily rusted.

Therefore, conventionally, as shown by an arrow A in FIG. 6, a front end portion of a flathead screwdriver or the like is inserted between the axle side bracket 6 and the flange portion 14 of the ball stud bracket 13, and the axle side bracket is bent. 6 and the flange portion 14 of the ball stud bracket 13 are separated. However, a loading platform 19 (see FIG. 4) is mounted on the upper portion of the side frame 1, and coupled with the work in a narrow work space, the rust of the spigot fitting portion causes the ball joint 9 to rust. It is difficult to remove from the vehicle body side, and a lot of work time is spent.
Accordingly, it is desired to develop a puller, jig, and tool that can easily remove the ball joint 9 from the vehicle body. Conventionally, a tool for removing a cylinder liner from a cylinder is known (see, for example, Patent Documents 1 and 2). Also, as a puller that pulls out the tapered part of the ball joint from the pitman arm, it has a pair of openable and closable claws, engages the claws with the pitman arm, and presses the tapered part in the axial direction with a push screw It is known (for example, refer to Patent Document 3).
Japanese Utility Model Publication No. 56-36623 Utility Model Registration No. 2554864 Japanese Patent Laid-Open No. 8-1538

  However, Patent Documents 1 and 2 are tools for extracting a cylinder liner from a cylinder, and the stroke is long in the vertical direction, and cannot be applied to work in a narrow work space in which a loading platform 19 is mounted on the upper part of the side frame 1. Patent Document 3 is a puller that removes the tapered portion of the ball joint from the pitman arm. As shown in FIG. 6, the cylindrical portion 16 on the lower surface of the ball stud bracket 13 fits into the recessed portion 17 of the axle side bracket 6 in-lay. In addition, it cannot be applied to the work of lifting the rusted ball stud bracket 13 and removing it from the axle bracket 6.

  The present invention has been made paying attention to the above circumstances, and the object of the present invention is to provide a ball joint puller that can easily remove the ball joint from the vehicle body side even in a narrow work space during vehicle body maintenance. It is to provide.

  In order to achieve the above object, the present invention engages a frame having a contact portion that comes into contact with a part of a vehicle body equipment having a ball joint with a socket portion that is externally fitted to the ball joint. An engaging member is provided, and a connecting member having a threaded portion is connected to the engaging member. A ball joint puller capable of moving the engagement member up and down by providing an elevating member threadedly engaged with a threaded portion of the connecting member on the upper surface portion of the frame body, and rotating around the axis of the connecting member. Features.

  Another feature is that an engagement member that engages with a socket portion that is externally fitted to the ball joint is provided on a frame body that has an abutting portion that comes into contact with a part of the vehicle equipment equipped with the ball joint. The engaging member has a threaded portion that engages with the upper surface portion of the frame body, and a connecting member that has an engaging portion capable of rotating the threaded portion at the upper end. And the ball joint puller which can raise / lower the said engagement member by rotating centering on the axial center of the said connection member is characterized.

  According to the present invention, the work of removing the ball joint from the vehicle body side can be easily and quickly performed even in a narrow work space of the vehicle body such as a truck having a loading platform mounted on the upper part of the ball joint. is there.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a first embodiment, FIG. 1 is a perspective view of a ball joint puller, and FIG. 2 is a longitudinal front view showing a state in which the ball joint is removed using the ball joint puller.

  The ball joint puller 20 includes a frame body 21 made of, for example, steel. The frame body 21 is formed in a gate shape so as to straddle the ball joint 9 by a beam member 22 and a pair of support legs 23 fixed to both left and right ends of the beam member 22. The pair of support legs 23 are parallel and formed to have the same length, and a lower end portion is provided with an abutting portion 24 that abuts on the flat surface 6a of the axle-side bracket 6 as the vehicle body equipment including the ball joint 9. Yes.

  A through hole 25 penetrating in the vertical direction is provided in the center of the beam member 22 of the frame body 21, and a connecting member 27 having a screw portion 26 on the shaft is provided in the through hole 25 so as to penetrate in the vertical direction. It has been. An engaging member 28 that is engaged with the socket portion 11 that is externally fitted to the ball joint 9 is fixed to the lower end portion of the connecting member 27.

  The engagement member 28 is formed in a semi-cylindrical shape that extends in the vertical direction by, for example, a steel material, and is provided with a recess 29 having a horseshoe shape in cross section so that the ball joint 9 can be straddled. That is, the engaging member 28 has an inner diameter and a height that can surround the entire ball joint 9, and a convex strip that engages with the lower surface portion 11 a of the socket portion 11 is formed on the inner peripheral portion of the lower end of the concave portion 29. An engaging portion 30 is provided.

  The threaded portion 26 of the connecting member 27 passes through the through hole 25 and protrudes to the upper portion of the beam member 22. A bearing 31 that receives a load in the thrust direction is fitted into the protruding portion, and the upper surface of the bearing 31 is An elevating member 32 made of a nut screwed with the screw portion 26 is provided. That is, by rotating the elevating member 32 around the axis of the connecting member 27, the rotational motion is converted into a linear motion, and the engaging member 28 can be moved up and down via the connecting member 27. Since the elevating member 32 is formed of a nut, it can be rotated from the horizontal direction by a tool such as a spanner, so that the work can be performed from the horizontal direction even if there is not enough work space above the ball joint puller 20. It can be done.

  Next, the operation of the ball joint puller 20 configured as described above will be described.

As the ball joint 9 swings with the link rod 8, the socket portion 11 rotates with the center of the ball stud 10 as a fulcrum, so that the bearing bush 12 may be worn and the flanged nut 18 may be loosened. In such a case, the ball joint 9 is removed from the axle bracket 6 and the link rod 8 is replaced.
First, a plurality of bolts 15 are removed and the fixation of the ball stud bracket 13 supporting the ball stud 10 and the axle side bracket 6 is released, but the cylindrical portion 16 of the ball stud bracket 13 is provided on the axle side bracket 6. Inlay fitting is carried out in the recessed part 17 and the inlay fitting part is often rusted by rainwater or muddy water.
Therefore, the frame body 21 of the ball joint puller 20 is set on the upper part of the axle side bracket 6, and the contact part 24 of the support leg 23 is brought into contact with the flat surface 6 a of the axle side bracket 6 to stand upright. Next, when the elevating member 32 is turned to move the engaging member 28 up and down via the connecting member 27 and the engaging portion 30 of the engaging member 28 is engaged with the lower surface portion 11 a of the socket portion 11, the ball joint 9 is It will be in the state enclosed by the recessed part 29. FIG.
In addition, by providing the confirmation opening 29 a in the wall surface portion of the recess 29, it is possible to confirm the engagement state between the engagement portion 30 of the engagement member 28 and the socket portion 11 of the ball joint 9. A method for confirming the engagement state between the engagement portion 30 and the socket portion 11 is that when the socket portion 11 of the ball joint 9 is received in the recess 29, the socket portion 11 of the ball joint 9 is opened in the confirmation opening 29a. This is performed by confirming that the socket portion 11 of the ball joint 9 is in the normal position in the recess 29 by confirming the state of contact with the edge of the ball, the amount protruding from the confirmation opening 29a, and the like.
Next, when the elevating member 32 is rotated from the lateral direction with a tool such as a spanner, the rotational motion of the elevating member 32 is converted into a linear motion by screwing with the screw portion 26, and the engaging member 28 is connected via the connecting member 27. Moves upward. Since the engaging portion 30 of the engaging member 28 is engaged with the lower surface portion 11 a of the socket portion 11, the upward movement of the engaging member 28 causes the cylindrical portion 16 of the ball stud bracket 13 and the axle side bracket 6 to move. The ball stud bracket 13 is detached from the axle side bracket 6 by coming out of the spigot fitting portion with the recessed portion 17, and the ball joint 9 can be detached from the axle side bracket 6.
In this case, the elevating member 32 can be rotated from the lateral direction by a tool such as a spanner, and it is easy to work even in work in a narrow work space of a vehicle body such as a truck with a loading platform mounted on the upper part of the ball joint 9. . Further, the engaging member 28 has a concave portion 29, and the engaging portion 30 is engaged with the lower surface portion 11 a of the socket portion 11 in a state where the ball joint 9 is surrounded by the concave portion 29. It can be pulled up in the vertical direction, no twisting force is applied to the spigot fitting portion, and it can be easily removed without scratching or damaging the ball joint 9 or the axle bracket 6. Further, since the elevating member 32 is supported by a bearing 31 that receives a load in the thrust direction, an operating force for rotating the elevating member 32 is reduced.

  In the first embodiment, when the elevating member 32 is turned, the connecting member 27 having the screw portion 26 screwed to the elevating member 32 moves up and down without rotating. However, the second embodiment shown in FIG. You may comprise as shown in this embodiment. That is, the screw portion 26 of the connecting member 27 is screwed into the screw hole 33 of the beam member 22 constituting the frame body 21 and penetrates the beam member 22 and protrudes upward. An engaging portion 34 is provided at the upper end of the connecting member 27 so that the connecting member 27 can be rotated from the lateral direction by a tool such as a spanner, and the lower end portion is rotatably connected to the engaging member 28. .

According to this embodiment, when a tool such as a spanner is engaged with the engaging portion 34 and the connecting member 27 is turned from the lateral direction, the connecting member 27 is rotated by the screwing of the screw portion 26 and the screw hole 33. The engaging member 28 moves upward through the connecting member 27. Since the connecting member 27 and the engaging member 28 are rotatable, the engaging member 30 does not rotate, and the engaging portion 30 is engaged with the lower surface portion 11 a of the socket portion 11. , The ball stud bracket 13 is detached from the axle side bracket 6 through the fitting portion between the cylindrical portion 16 of the ball stud bracket 13 and the recessed portion 17 of the axle side bracket 6, and the ball joint 9 is removed from the axle side bracket 6. Can be removed from.
In the above-described embodiment, the frame body 20 has a gate shape, but may be a box shape having an opening on the lower surface and one side surface, and is not limited to the shape. The engaging member 28 is also semi-cylindrical and has a horseshoe shape in cross section, but is not limited to the shape.
Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

1 is a perspective view of a ball joint puller according to a first embodiment of the present invention. The longitudinal cross-sectional front view which shows the state which removes a ball joint using the ball joint puller of the embodiment. The longitudinal cross-sectional front view which shows the 2nd Embodiment of this invention and shows the state which removes a ball joint using a ball joint puller. The perspective view of the ball joint provided in the upper part of the axle housing. The side view of the ball joint provided in the upper part of the axle housing. The longitudinal side view of a ball joint.

Explanation of symbols

6 ... Axle side bracket, 9 ... Ball joint, 10 ... Ball stud, 11 ... Socket part, 20 ... Ball joint puller, 21 ... Frame body, 24 ... Abutting part, 26 ... Screw part, 27 ... Connecting member, 28 ... engaging member, 32 ... elevating member

Claims (5)

A frame having an abutting portion that abuts a part of the vehicle body equipment including the ball joint;
An engagement member that is provided on the frame and engages with a socket portion that is externally fitted to the ball joint;
A connecting member having a lower end connected to the engaging member and an upper end having a threaded portion penetrating the upper surface of the frame;
An elevating member provided on an upper surface portion of the frame body, screwed with a threaded portion of the connecting member, and rotated around an axis of the connecting member to move the engaging member up and down;
A ball joint puller characterized by comprising:   The ball joint puller according to claim 1, wherein a bearing for receiving a load in a thrust direction of the connecting member is interposed between the upper surface portion of the frame body and the elevating member. A frame having an abutting portion that abuts a part of the vehicle body equipment including the ball joint;
An engagement member that is provided on the frame and engages with a socket portion that is externally fitted to the ball joint;
A connecting member having a lower end rotatably connected to the engaging member, an intermediate portion having a screw portion screwed with the upper surface portion of the frame, and an upper end having an engaging portion capable of rotating the screw portion; With
A ball joint puller, wherein the engaging member is moved up and down by rotating about the axis of the connecting member.   The engaging member is formed in a cylindrical shape extending in the vertical direction, has a recess straddling the ball joint, and has an engaging portion that engages with a lower surface portion of the socket portion at a lower end portion of the recess. The ball joint puller according to claim 1, wherein the ball joint puller is provided.   The ball according to claim 4, wherein a confirmation opening for confirming an engagement state between the engagement portion and the socket portion is provided in a wall portion of the cylindrical concave portion of the engagement member. Joint puller.

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