JP4968890B2 - Ball joint - Google Patents

Description

  The present invention relates to a ball joint used for a suspension device or a steering device of an automobile.

  Conventionally, ball joints used in automobile suspension devices, steering devices, and the like have a ball stud having a spherical ball head and a handle protruding from the ball head, and a ball stud of the ball stud that swings around the ball head. 2. Description of the Related Art A technique is known in which a sheet that is movably held, a housing that holds a sheet, and a lubricant that is filled between the sheet and a ball head are assembled together. Then, by forming a lubricant reservoir in which the lubricant is stored between the seat and the ball head, the swing torque and rotation torque of the ball stud of the ball stud are set to desired values.

  As a method for forming this lubricant reservoir, a technique is known in which a protrusion (fin) extending in the axial direction of the ball joint is provided on the outer peripheral surface of the seat and the ball joint is assembled. When a sheet having this protrusion is assembled, the protrusion on the outer peripheral surface of the sheet is sandwiched between the ball head of the ball stud and the housing, and the material of the protrusion moves to the thin part of the sheet between the protrusions. . Due to the material movement of the protruding portion to the thin portion, the thin portion of the seat moves toward the housing, and a substantially circular lubricant reservoir is formed between the inner peripheral surface of the seat corresponding to the thin portion and the ball head of the ball stud. (See Patent Document 1).

  Similarly, as a method of forming a lubricant reservoir, a technique is known in which a substantially circular flat portion is formed on the outer peripheral surface of a seat and a ball joint is assembled. When the seat having the flat portion is assembled, the substantially circular flat portion of the outer peripheral surface of the seat comes into contact with the housing, and the substantially circular lubricant reservoir is axially disposed between the inner peripheral surface of the seat and the ball head of the ball stud. A plurality are formed in the direction and the circumferential direction (see Patent Document 2).

Further, as a method for forming a similar lubricant reservoir, a technique is known in which a groove extending in the circumferential direction is formed on the inner peripheral surface of the housing and a ball joint is assembled. When the seat is assembled to the circumferentially formed housing, the seat is plastically deformed into the groove of the housing, so that a lubricant reservoir extending in the circumferential direction is formed between the seat inner circumferential surface and the ball stud ball head. Is formed (see Patent Document 3).
Japanese Patent Publication No.3-30008 JP-A-7-259842 JP 2003-130038 A

  However, since these lubricant reservoirs have a substantially circular shape or are formed only in the circumferential direction of the ball head of the ball stud, the axial length of the lubricant reservoir to be formed is short, and the ball stud There is a problem that the rotational torque becomes high when the spherical head of the sphere is rotated about the axis.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ball joint in which a rotating torque is reduced when a ball head of a ball stud rotates around an axis.

A ball joint according to the present invention includes a ball stud having a spherical ball head and a handle protruding from the ball head, a seat for holding the ball head of the ball stud in a swingable manner, and a seat. A ball joint that is filled with a lubricant between the seat and the ball head, and a housing axial recess that is longer in the axial direction than the radial dimension is formed on the inner surface of the housing. Is deformed into a recess in the axial direction of the housing, forming an axial lubricant reservoir having a longer axial dimension than the radial dimension between the ball head and the inner surface of the seat, and extending circumferentially on the inner surface of the housing. forming a direction recesses, the sheet is deformed into the housing circumferential recess, a first feature in that reservoir circumferential lubricant extending in the circumferential direction between the ball head portion and the sheet inner surfaces of the are formed

A ball joint according to the present invention includes a ball stud having a spherical ball head and a handle protruding from the ball head, a seat for holding the ball head of the ball stud in a swingable manner, and a seat. A ball joint that is filled with a lubricant between the seat and the ball head , and a housing axial recess that is longer in the axial direction than the radial dimension is formed on the inner surface of the housing. Is deformed into the recess in the axial direction of the housing, forming an axial lubricant reservoir having a longer axial dimension than the radial dimension between the ball head and the inner surface of the seat, and extending in the circumferential direction on the outer surface of the seat A second feature is that a directional recess is formed, the seat circumferential recess is deformed to the housing side, and a circumferential lubricant reservoir extending in the circumferential direction is formed between the ball head and the inner surface of the seat .

A ball joint according to the present invention includes a ball stud having a spherical ball head and a handle protruding from the ball head, a seat for holding the ball head of the ball stud in a swingable manner, and a seat. A ball joint that is filled with a lubricant between the seat and the ball head, and in which a seat axial recess is formed on the outer surface of the seat that is longer in the axial direction than in the radial direction. The axial recess is deformed to the housing side, forming an axial lubricant reservoir having a longer axial dimension than the radial dimension between the ball head and the inner surface of the seat, and extending circumferentially on the inner surface of the housing. A third feature is that a directional recess is formed, the seat is deformed into a circumferential recess in the housing, and a circumferential lubricant reservoir extending in the circumferential direction is formed between the ball head and the inner surface of the seat .

A ball joint according to the present invention includes a ball stud having a spherical ball head and a handle protruding from the ball head, a seat for holding the ball head of the ball stud in a swingable manner, and a seat. A ball joint that is filled with a lubricant between the seat and the ball head, and in which a seat axial recess is formed on the outer surface of the seat that is longer in the axial direction than in the radial direction. The axial recess is deformed toward the housing, forming an axial lubricant reservoir having a longer axial dimension than the radial dimension between the ball head and the inner surface of the seat, and extending in the circumferential direction on the outer surface of the seat A fourth feature is that a directional recess is formed, the seat circumferential recess is deformed to the housing side, and a circumferential lubricant reservoir extending in the circumferential direction is formed between the ball head and the inner surface of the seat .

  In the ball joint of the present invention, in addition to the fourth feature, two handle portions protrude diagonally from the ball head in the axial direction of the ball stud, and the housing is a housing through which the two handle portions penetrate. A fifth feature is to have an opening.

According to the ball joint of the first feature of the present invention, a housing axial recess having an axial dimension longer than a radial dimension is formed on the inner surface of the housing, the seat is deformed into the housing axial recess, and the ball head Since an axial lubricant reservoir having an axial dimension longer than the radial dimension is formed between the section and the inner surface of the seat, when the ball stud rotates about the axis, the area where the lubricant spreads is wide in the axial direction. Thus, the rotational torque of the ball joint can be reduced. Further, a housing circumferential recess extending in the circumferential direction is formed on the inner surface of the housing, the seat is deformed in the housing circumferential recess, and a circumferential lubricant reservoir extending in the circumferential direction between the ball head and the inner surface of the seat. Therefore, when the ball stud swings, the area where the lubricant spreads is widened in the circumferential direction, and the swing torque of the ball joint can be reduced.

According to the ball joint of the second feature of the present invention, the housing axial recess having an axial dimension longer than the radial dimension is formed on the inner surface of the housing, the seat is deformed into the housing axial recess, and the ball head Since an axial lubricant reservoir having an axial dimension longer than the radial dimension is formed between the section and the inner surface of the seat, when the ball stud rotates about the axis, the area where the lubricant spreads is wide in the axial direction. Thus, the rotational torque of the ball joint can be reduced. In addition, a sheet circumferential recess extending in the circumferential direction is formed on the outer surface of the seat, the sheet circumferential recess is deformed to the housing side, and a circumferential lubricant reservoir extending in the circumferential direction between the ball head and the inner surface of the seat Therefore, when the ball stud swings, the area where the lubricant spreads is widened in the circumferential direction, and the swing torque of the ball joint can be reduced.

According to the ball joint of the third feature of the present invention, the seat axial direction recess having an axial dimension longer than the radial dimension is formed on the outer surface of the seat, and the seat axial recess is deformed to the housing side, Since an axial lubricant reservoir having an axial dimension longer than the radial dimension is formed between the section and the inner surface of the seat, when the ball stud rotates about the axis, the area where the lubricant spreads is wide in the axial direction. Thus, the rotational torque of the ball joint can be reduced. Further, a housing circumferential recess extending in the circumferential direction is formed on the inner surface of the housing, the seat is deformed in the housing circumferential recess, and a circumferential lubricant reservoir extending in the circumferential direction between the ball head and the inner surface of the seat. Therefore, when the ball stud swings, the area where the lubricant spreads is widened in the circumferential direction, and the swing torque of the ball joint can be reduced.

According to the ball joint of the fourth feature of the present invention, a seat axial recess is formed on the outer surface of the seat having an axial dimension longer than the radial dimension, and the seat axial recess is deformed to the housing side, Since an axial lubricant reservoir having an axial dimension longer than the radial dimension is formed between the section and the inner surface of the seat, when the ball stud rotates about the axis, the area where the lubricant spreads is wide in the axial direction. Thus, the rotational torque of the ball joint can be reduced. In addition, a sheet circumferential recess extending in the circumferential direction is formed on the outer surface of the seat, the sheet circumferential recess is deformed to the housing side, and a circumferential lubricant reservoir extending in the circumferential direction between the ball head and the inner surface of the seat Therefore, when the ball stud swings, the area where the lubricant spreads is widened in the circumferential direction, and the swing torque of the ball joint can be reduced.

  According to the ball joint of the fifth feature of the present invention, two handle portions protrude diagonally from the ball head in the axial direction of the ball stud, and the housing has a housing opening through which the two handle portions penetrate. Therefore, when this ball joint is attached to an automobile suspension system or the like, the ball joint rotates or swings about the axes of the two handle portions. A ball joint having two handle portions is attached to a suspension device or the like of an automobile that is more frequently rotated around the axial direction of the ball stud than a ball joint having one handle portion. Such a reduction in the rotational torque of the ball joint having two handle portions is extremely effective for improving the performance of a suspension device of an automobile having a high rotational frequency.

  1 to 7 show an embodiment of the present invention. FIG. 1 is a sectional front view showing a state in which a ball joint is assembled, FIG. 2 is a partial sectional front view of a seat, and FIG. FIG. 4 is a cross-sectional front view, FIG. 4 is an enlarged view of a main part in a state where the ball joint is assembled, and FIG. 5 is a cross-sectional front view in a state where the ball stud is removed after the ball joint is assembled. FIG. 6 is a sectional plan view showing a first stage for assembling the ball joint, and FIG. 7 is a sectional plan view showing a second stage for assembling the ball joint. FIG. 8 is an enlarged view of a main part in a state immediately before the assembly of the ball joint is completed. FIG. 9 is a partial cross-sectional front view of the seats of the second and fifth embodiments, and FIG. 10 is a cross-sectional front view of the housing of the second embodiment. FIG. 11 is an enlarged view of a main part in a state where the ball joint of the second embodiment is assembled. FIG. 12 is a partial cross-sectional front view of the sheet of the third embodiment. FIG. 13 is a cross-sectional front view showing a state in which the ball stud is removed after assembling the ball joints of the third, fourth and fifth embodiments. FIG. 14 is a sectional front view of the housing of the fourth embodiment. FIG. 15 is a sectional front view of the housing of the fifth embodiment.

  First, an assembled ball joint 1 according to an embodiment of the present invention will be described with reference to FIG. The assembled ball joint 1 swings the ball stud 2 having a spherical ball head 2a and handle portions 2b and 2c protruding from both axial ends of the ball head 2a, and the ball head 2a of the ball stud 2. The seat 3 for rotatably holding, the housings 4 and 5 for holding the seat 3, and one end mounted in boot mounting grooves 2 d and 2 e formed on the outer peripheral surface of the handle portions 2 b and 2 c of the ball stud 2. The other end has boots 6 and 7 attached to boot attachment grooves 4f and 5f formed on the outer peripheral surfaces of the housings 4 and 5, respectively.

  Next, the seat 3 before assembling the ball joint will be described in detail with reference to FIG. The sheet 3 is molded from a synthetic resin, and has sheet openings 3d and 3e for projecting the handle portions 2b and 2c of the ball stud 2 at both ends in the axial direction. At the central equator part of the outer surface of the sheet 3, a sheet collar part 3f is formed in which the sheet 3 is sandwiched and fixed between the two housings 4 and 5. A cylindrical shape is formed on one side in the axial direction across the sheet collar part 3f. It has a cylindrical portion 3g and a hemispherical hemispherical portion 3h on the other side. On the outer surface of the cylindrical portion 3g, twelve sheet axial recesses 3a having an axial dimension 3y longer than the radial dimension 3x are formed at equal intervals in the circumferential direction. Similarly, twelve sheet axial recesses 3a having an axial dimension 3y longer than the radial dimension 3x are formed on the outer surface of the hemispherical part 3h at equal intervals in the circumferential direction.

  Next, the housings 4 and 5 before the ball joint is assembled will be described in detail with reference to FIG. The housings 4 and 5 are composed of a first housing 4 and a second housing 5. The first housing 4 is formed of iron, and has a housing opening 4d penetrating the handle 2b of the ball stud 2 at one end in the axial direction and a housing opening 4e into which the second housing 5 can be inserted into the other end in the axial direction. Have. A circumferential boot mounting groove 4f is formed in the outer peripheral surface of the housing opening 4d at one end of the first housing 4, and a cylindrical caulking portion 4g is formed in the housing opening 4e at the other end. The inner peripheral surface 4 c on which the seat 3 of the first housing 4 is mounted has a hemispherical hemispherical portion 4 h, and the inner diameter of the hemispherical portion 4 h is smaller than the outer diameter of the seat 3 mounted in the housing 4. ing. A cylindrical part 4i having a cylindrical shape is formed on the inner peripheral surface of the first housing 4 to which the second housing 5 is inserted. Between the hemispherical portion 4h and the cylindrical portion 4i is formed a seat step portion 4j on which the seat flange portion 3f of the seat 3 is seated, and between the cylindrical portion 4i and the caulking portion 4g, a housing flange of the second housing 5 is formed. A housing step portion 4k on which the portion 5g is seated is formed.

  The second housing 5 to be inserted into the first housing 4 is made of iron like the housing 4 and has a housing opening 5d penetrating the handle 2c of the ball stud 2 at one end in the axial direction and the other end in the axial direction. The ball head 2 has a ball head 2a and a housing opening 5e through which the seat 3 passes. A circumferential boot mounting groove 5f is formed in the outer peripheral surface of the housing opening 5d at one end, and the sheet collar portion 3f of the seat 3 is connected to the seat step 4j of the housing 4 in the housing opening 5e at the other end. The tip acute angle portion 5i sandwiched and fixed by is formed. A housing flange 5g is formed at the substantially center of the outer peripheral surface of the second housing 5 in the axial direction. The inner peripheral surface 5 c of the second housing 5 on which the seat 3 is mounted has a hemispherical portion 5 h, and the inner diameter of the hemispherical hemispherical portion 5 h is smaller than the outer diameter of the seat 3.

  Next, the state of the seat 3 of the ball joint 1 that has been assembled will be described in detail with reference to FIGS. In the ball joint 1 that has been assembled, as described above, the inner diameters of the hemispherical portions 4h and 5h on which the seats 3 of the housings 4 and 5 are mounted are formed smaller than the outer diameter of the seat 3, and the seat openings 3d and 3e are formed in the housing 4 , 5 is pressed toward the center in the axial direction of the sheet, the thin portion of the sheet 3 corresponding to the recess 3a in the axial direction of the sheet is plastically deformed toward the housings 4 and 5, and the axial dimension py is larger than the radial dimension px. A long axial lubricant reservoir P1 is formed. The lubricant G is accumulated in the axial lubricant reservoir P1. Even during the plastic deformation, a slight space is formed between the seat axis direction concave portion 3a and the hemispherical portions 4h and 5h of the housings 4 and 5.

  Next, a method for manufacturing the ball joint 1 will be described with reference to FIGS. First, as shown in FIG. 6, the seat 3 is press-fitted into the first housing 4 from the housing opening 4 e side, and the seat collar 3 f is seated on the seat step 4 j of the first housing 4. Subsequently, the ball stud 2 coated with the lubricant G around the ball head 2 a is inserted from the handle 2 b side to the seat opening 3 e side, and the ball head 2 a of the ball stud 2 is press-fitted into the inner surface 3 c of the seat 3. .

After that, as shown in FIG. 7, the outer peripheral surface of the seat 3 and the inside of the first housing 4 until the housing flange 5 g is seated on the housing step 4 k of the first housing 4 from the housing opening 5 e side of the second housing 5. Press fit between the peripheral surfaces. The hemispherical portion 5 h of the second housing 5 has substantially the same curvature as the curvature of the ball head 2 a of the ball stud 2. When the second housing 5 is press-fitted, the cylindrical portion 3 g of the seat 3 is It deforms according to the curvature of the hemispherical part 5h. When the caulking portion 4g on the housing opening 4e side of the housing 4 starts to be caulked so as to wrap the housing flange portion 5g of the second housing 5, the ball head 2a of the ball stud 2 and the inner surface 3c of the seat 3 are shown in FIG. Is in a close contact state, and the inner surface 3c of the seat 3 and the hemispherical portion 5h of the housing 5 form a space defined by the seat axial direction recess 3a. Furthermore with the housing flange portion 5g of the second housing 5 is seated in the housing stepped portion 4k of the first housing 4, the tip sharp portion 5i of the second housing 5, are pierced secured to the seat flange portion 3 f of the sheet 3, As shown in FIGS. 4 and 5, the ball joint 1 after the caulking is fixed is such that the thin portion of the seat 3 corresponding to the seat axial recess 3 a is moved and deformed toward the housings 4 and 5, and the inner surface 3 c of the seat 3 And the space formed by the recess 3a in the seat axial direction between the hemispherical portion 5h of the housing 5 is reduced. Between the ball head 2a of the ball stud 2 and the inner surface 3c of the seat 3, an axial lubricant reservoir P1 having an axial dimension py longer than the radial dimension px is formed. And the lubricant G accumulates in this axial direction lubricant reservoir P1. Thereafter, the boot 6 is attached to the boot attachment groove 2d of the ball stud 2 and the boot attachment groove 4f of the first housing 4, and the circlip 10 is fitted to the outer periphery of the boot 6 attached to the boot attachment groove 4f. Similarly, the boot 7 is attached to the boot attachment groove 2e of the ball stud 2 and the boot attachment groove 5f of the second housing 5, and the circlip 11 is fitted on the outer periphery of the boot 7 attached to the boot attachment groove 5f. The assembly of the joint 1 is completed.

  The ball joint 1 that has been assembled is press-fitted into an arm opening 12a of an arm 12 that is used in a suspension device and a steering device of an automobile. The ball joint 1 in use is rotated mainly around the axes of the two handle portions 2b and 2c, and is also slightly swung.

  In the ball joint 1 as described above, the seat axial recess 3a having an axial dimension 3y longer than the radial dimension 3x is formed on the outer surface of the seat 3, and the seat axial recess 3a is deformed toward the housings 4 and 5, Since the axial lubricant reservoir P1 having an axial dimension py longer than the radial dimension px is formed between the ball head 2a and the inner surface 3c of the seat 3, lubrication occurs when the ball stud 1 rotates about the axis. The area where the agent G is spread becomes wider in the axial direction, and the rotational torque of the ball joint 1 can be reduced.

Further, the handle portions 2b and 2c project two diagonally from the ball head 2a in the axial direction of the ball stud 2, and the housings 4 and 5 have housing openings 4d and 2d through which the two handle portions 2b and 2c pass. 5d, when this ball joint is attached to a suspension device of an automobile, the ball joint rotates or swings about the axes of the two handle portions 2b and 2c. The two shank 2b, ball joint 1 which rotates or oscillates about the axis of 2c is a handle part has one, compared with the ball join you want to rotate or swing, the axial direction of the ball stud 2 It is attached to a suspension system of an automobile that is frequently rotated around the center. And reduction of the rotation torque of the ball joint 1 is extremely effective for improving the performance of a suspension device for automobiles with high rotation frequency.

  As an embodiment of the present invention, a sheet axial recess 3a having an axial dimension 3y longer than the radial dimension 3x is formed on the outer surface of the sheet 3, and the seat axial recess 3a is deformed to the housings 4 and 5 side. The axial lubricant reservoir P1 having an axial dimension py longer than the radial dimension px is formed between the ball head 2a and the inner surface 3c of the sheet 3, but as a second embodiment, as shown in FIG. 3 is not formed with a recess in the seat axial direction, but is simply formed in a cylindrical or hemispherical shape, and each of the hemispherical portions 4h and 5h of the inner surfaces 4c and 5c of the housings 4 and 5 is formed as shown in FIG. The housing axial direction recessed parts 4a and 5a whose axial direction dimensions 4y and 5y are longer than the radial direction dimensions 4x and 5x are formed. Then, the ball joint 1 is assembled, and as shown in FIG. 11, the seat 3 is plastically deformed in the housing axial recesses 4a and 5a, and the radial dimension px is set between the ball head 2a and the inner surface 3c of the seat 3. An axial lubricant reservoir P1 having a longer axial dimension py may be formed.

  As a third embodiment, as shown in FIG. 12, a sheet circumferential recess 3b extending in the circumferential direction is formed on the outer surface of the seat 3 in addition to the seat axial recess 3a, and a housing as shown in FIG. The inner peripheral surfaces 4 and 5 do not form the housing axial recesses 4a and 5a, but only the hemispherical portions 4h and 5h. Then, the ball joint 1 is assembled, and the seat circumferential recess 3b is also deformed toward the housings 4 and 5, and as shown in FIG. 13, between the ball head 2a of the ball stud 2 and the inner surface 3c of the seat 3. In addition to the axial lubricant reservoir P1, a circumferential lubricant reservoir P2 extending in the circumferential direction may be formed. In this case, in addition to reducing the rotational torque of the ball joint 1 due to the axial lubricant reservoir P1, when the ball stud 2 swings, the area over which the lubricant G is spread becomes larger in the circumferential direction. Can also be reduced.

  Further, as a fourth embodiment, as shown in FIG. 14, housing circumferential recesses 4b and 5b extending in the circumferential direction are formed on the inner surfaces 4c and 5c of the housings 4 and 5, and as shown in FIG. A sheet axial recess 3a having an axial dimension 3y longer than the radial dimension 3x is formed on the outer surface of the sheet. Then, the ball joint 1 is assembled, and the seat axial recess 3a is plastically deformed toward the housings 4 and 5, and portions corresponding to the housing circumferential recesses 4b and 5b of the seat 3 are plasticized in the housing circumferential recesses 4b and 5b. As shown in FIG. 13, in addition to the axial lubricant reservoir P1, a circumferential lubricant reservoir P2 extending in the circumferential direction is formed between the ball head 2a of the ball stud 2 and the inner surface 3c of the seat 3 as shown in FIG. You may do it.

  Further, as a fifth embodiment, as shown in FIG. 15, the housing spherical direction recesses 4a and 5b are formed in the hemispherical portions 4h and 5h of the inner surfaces 4c and 5c of the housings 4 and 5, and the housing circumferential recesses 4b and 5b in the circumferential direction. As shown in FIG. 9, the sheet axial direction recess is not formed on the outer peripheral surface of the sheet 3, but is simply formed in a cylindrical or hemispherical shape. When this ball joint 1 is assembled, the seat 3 is plastically deformed into the housing axial recesses 4a and 5a and the housing circumferential recesses 4b and 5b, and as shown in FIG. Between the inner surface 3c of the sheet 3, an axial lubricant reservoir P1 and a circumferential lubricant reservoir P2 extending in the circumferential direction may be formed.

  In the above-described embodiment, the sheet axial recess 3a formed on the outer surface of the sheet 3 is formed in parallel with the axial direction of the sheet 3. However, if the axial dimension 3y is longer than the radial dimension 3x, the sheet 3 has a different shape. It may be formed. Moreover, although the housing axial direction recessed parts 4a and 5a formed in the inner surfaces 4c and 5c of the housings 4 and 5 were formed in parallel with the axial direction of the housings 4 and 5, the axial direction dimension is larger than the radial direction dimensions 4x and 5x. If 4y and 5y are long, they may be formed in different shapes. Further, although the twelve seat axial recesses 3a and the housing axial recesses 4a and 5a are formed in the circumferential direction, they may be formed in different numbers.

It is a section front view showing the state where the ball joint of the example of the present invention was assembled. It is a partial cross section front view of the sheet | seat of the Example of this invention. It is a section front view of the housing of the example of the present invention. It is a principal part enlarged view of FIG. 1 of the Example of this invention. It is a cross-sectional front view of the state which removed the ball stud after the assembly | attachment of the ball joint of the Example of this invention. It is a section front view showing the 1st step which assembles the ball joint of the present invention. It is a sectional front view showing the 2nd step which assembles the ball joint of the present invention. It is a principal part enlarged view of the state just before the assembly | attachment of the ball joint of this invention is completed. It is a partial cross section front view of the sheet | seat of the 2nd Example and 5th Example of this invention. It is a section front view of the housing of the 2nd example of the present invention. It is a principal part enlarged view of the state by which the ball joint of the 2nd Example of this invention was assembled | attached. It is a partial cross section front view of the sheet | seat of the 3rd Example of this invention. It is a cross-sectional front view of the state which removed the ball stud 2 after the assembly | attachment of the ball joint of the 3rd, 4th and 5th Example of this invention. It is a section front view of the housing of the 4th example of the present invention. It is a section front view of the housing of the 5th example of the present invention.

Explanation of symbols

2 Ball stud 2a Ball head 2b, 2c Handle 3 Sheet 3a Seat axial recess 3b Seat circumferential recess 3c Seat inner surface 3x Radial dimension of seat axial recess 3y Axial dimension 4 of seat axial recess 4 (first 1) Housing 5 (Second) Housing 4b, 5b Housing circumferential recess 4c, 5c Housing inner surface 4a, 5a Housing axial recess 4d, 5d Housing opening 4x, 5x Radial dimension of housing axial recess 4y, 5y Housing Axial dimension of axial recess P1 axial lubricant reservoir P2 circumferential lubricant reservoir px radial dimension of axial lubricant reservoir py axial dimension of axial lubricant reservoir G lubricant

Claims (5)

A ball stud (2) having a spherical ball head (2a) and a handle (2b, 2c) protruding from the ball head (2a);
A seat (3) holding the ball head (2a) of the ball stud (2) in a swingable manner;
A housing (4, 5) for holding the sheet (3),
In the ball joint filled with the lubricant (G) between the seat (3) and the ball head (2a),
A housing axial recess (4a, 5a) having an axial dimension (4y, 5y) longer than a radial dimension (4x, 5x) is formed on the inner surface (4c, 5c) of the housing (4, 5), The seat (3) is deformed into the housing axial recess (4a, 5a), and the axial dimension is larger than the radial dimension (px) between the spherical head (2a) and the inner surface (3c) of the seat (3). (Py) forms a long axial lubricant reservoir (P1) ,
A housing circumferential recess (4b, 5b) extending in the circumferential direction is formed on the inner surface (4c, 5c) of the housing (4, 5), and the seat (3) is inside the housing circumferential recess (4b, 5b). The ball joint is characterized in that a circumferential lubricant reservoir (P2) extending in the circumferential direction is formed between the ball head (2a) and the inner surface (3c) of the seat (3) . A ball stud (2) having a spherical ball head (2a) and a handle (2b, 2c) protruding from the ball head (2a);
A seat (3) holding the ball head (2a) of the ball stud (2) in a swingable manner;
A housing (4, 5) for holding the sheet (3),
In ball joint lubricant (G) is filled between the sheet (3) and the ball head (2a),
A housing axial recess (4a, 5a) having an axial dimension (4y, 5y) longer than a radial dimension (4x, 5x) is formed on the inner surface (4c, 5c) of the housing (4, 5), The seat (3) is deformed into the housing axial recess (4a, 5a), and the axial dimension is larger than the radial dimension (px) between the spherical head (2a) and the inner surface (3c) of the seat (3). (Py) forms a long axial lubricant reservoir (P1) ,
A sheet circumferential recess (3b) extending in the circumferential direction is formed on the outer surface of the sheet (3), the sheet circumferential recess (3b) is deformed toward the housing (4, 5), and the ball head ( A ball joint characterized in that a circumferential lubricant reservoir (P2) extending in the circumferential direction is formed between 2a) and the inner surface (3c) of the seat (3) . A ball stud (2) having a spherical ball head (2a) and a handle (2b, 2c) protruding from the ball head (2a);
A seat (3) holding the ball head (2a) of the ball stud (2) in a swingable manner;
A housing (4, 5) for holding the sheet (3),
In the ball joint filled with the lubricant (G) between the seat (3) and the ball head (2a),
A sheet axial recess (3a) having an axial dimension (3y) longer than a radial dimension (3x) is formed on the outer surface of the sheet (3), and the seat axial recess (3a) is formed in the housing (4, 4). 5) An axial lubricant reservoir (P1) that is deformed to the side and whose axial dimension (py) is longer than the radial dimension (px) between the spherical head (2a) and the inner surface (3c) of the seat (3). )
A housing circumferential recess (4b, 5b) extending in the circumferential direction is formed on the inner surface (4c, 5c) of the housing (4, 5), and the seat (3) is inside the housing circumferential recess (4b, 5b). The ball joint is characterized in that a circumferential lubricant reservoir (P2) extending in the circumferential direction is formed between the ball head (2a) and the inner surface (3c) of the seat (3). A ball stud (2) having a spherical ball head (2a) and a handle (2b, 2c) protruding from the ball head (2a);
A seat (3) holding the ball head (2a) of the ball stud (2) in a swingable manner;
A housing (4, 5) for holding the sheet (3),
In the ball joint filled with the lubricant (G) between the seat (3) and the ball head (2a),
A sheet axial recess (3a) having an axial dimension (3y) longer than a radial dimension (3x) is formed on the outer surface of the sheet (3), and the seat axial recess (3a) is formed in the housing (4, 4). 5) An axial lubricant reservoir (P1) that is deformed to the side and whose axial dimension (py) is longer than the radial dimension (px) between the spherical head (2a) and the inner surface (3c) of the seat (3). )
A sheet circumferential recess (3b) extending in the circumferential direction is formed on the outer surface of the sheet (3), the sheet circumferential recess (3b) is deformed toward the housing (4, 5), and the ball head ( A ball joint characterized in that a circumferential lubricant reservoir (P2) extending in the circumferential direction is formed between 2a) and the inner surface (3c) of the seat (3).   The handle portions (2b, 2c) project two diagonally from the ball head (2a) in the axial direction of the ball stud (2), and the housing (4, 5) has two handle portions ( 5. The ball joint according to claim 1, further comprising a housing opening (4 d, 5 d) through which 2 b, 2 c) passes.

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