Joint filling type sliding bush and manufacturing method thereof

Abstract

One embodiment of the present invention relates to a caulking-type sliding bush, comprising: a metal inner sleeve comprising a ball part, and a first stud part and a second stud part extending along the upper side and the lower side of the ball part; the ball seat surrounds the outer side surface of the inner sleeve and is made of a plastic material so as to absorb vibration and impact generated by the rotating motion of the inner sleeve; the middle sleeve is made of a metal material, surrounds the outer side surface of the ball seat and supports the ball seat; a buffer member which surrounds the outer surface of the intermediate sleeve and is made of a rubber material so as to absorb vibration and impact generated by the swinging motion of the inner sleeve; an outer sleeve made of a metal material surrounding the outer surface of the buffer member and supporting the buffer member; and a pair of plug-integrated oil seals assembled through the outer surface of the end portion of the inner sleeve, the end surface of the end portion of the ball seat, and the inner surface of the end portion of the intermediate sleeve, and affixed to each other by means of a caulking portion formed by bending the end portion of the intermediate sleeve.

Description

Technical Field

[0001] The present invention relates to a caulking type sliding bushing and a method for manufacturing the same, and more particularly to a caulking type sliding bushing for improving riding comfort by absorbing vibration and impact generated when a vehicle is running and a method for manufacturing the same. Background Art

[0002] Generally, a sliding bush and a cross axis ball joint are provided at a connection portion between a vehicle body and a suspension member to absorb vibration and shock transmitted from a road surface, thereby improving a ride quality.

[0003] Reference Figure 1 The existing bushing 10 is equipped with a rubber component 13 that plays a buffering role between the inner sleeve 11 and the outer sleeve 12. The rubber component 13 is joined to the inner sleeve 11 and the outer sleeve 12 made of metal material to absorb vibration and impact caused by the rotation and swinging movement of the inner sleeve 11 between the components connected to the inner sleeve 11 and the components connected to the outer sleeve 12.

[0004] Thus, for the rubber component 13 equipped in the existing bushing 10, although the vibration and impact absorption performance is outstanding due to the characteristics of the rubber material, thereby having the advantage of being able to improve the riding feel, its disadvantage is that due to its low strength, it will be twisted due to continuous vibration and impact, and will be damaged in the parts with larger deformation, thereby resulting in reduced durability, especially the problem of weak durability in the rotation direction.

[0005] Reference Figure 2 The existing cross-axis ball joint 20 is composed of: a pillow ball 21 made of metal material, which is composed of a spherical portion 21a and a first connecting portion 21b and a second connecting portion 21c extending to both sides thereof; a ball seat 22, which surrounds the outer surface of the spherical portion 21a and is made of plastic material to absorb vibration and impact caused by the rotation and swinging movement of the pillow ball 21; a ball socket 23 made of metal material, which surrounds the outer surface of the ball seat 22 and supports the ball seat 22; a plug 24, which is fixed Placed in the ball socket 23 and prevent the ball seat 22 from detaching; the sleeves 25-1 and 25-2, whose two ends are respectively made of the first connecting part 21b and a side of the ball socket 23 and the second connecting part 21c and the plug 24 to seal the space between the pillow ball 21 and the ball socket 23; and the first fastening rings 26-1, 26-2 and the second fastening rings 27-1, 27-2, which are used to fix the two ends of the sleeves 25-1 and 25-2 to the two ends of the pillow ball 21, a side of the ball socket 23 and the plug 24 respectively.

[0006] Thus, for the existing cross-axis ball joint 20, although the ball seat 22 is made of a relatively high-strength plastic material, which makes it durable and not easily damaged by the continuous vibration and impact caused by the rotation and swinging motion of the pillow-shaped ball 21, due to the characteristics of the plastic material, it has the disadvantage of reduced riding comfort due to its low vibration and impact absorption performance.

[0007] In addition, the existing cross-axis ball joint 20 has the disadvantage that, in order to set the sleeves 25-1 and 25-2 for sealing the space between the pillow-shaped ball 21 and the ball socket 23, the two ends of the pillow-shaped ball 21 need to protrude further outward than the position where the ball socket 23 or the plug 24 is set, resulting in the pillow-shaped ball 21 being correspondingly longer, and the vehicle assembly is poor. In addition, as an assembly of multiple parts, the existing cross-axis ball joint 20 has the disadvantages of complex structure and manufacturing process and high manufacturing cost.

[0008] Korean Patent No. 10-2405188 discloses a prior art related to the conventional sliding bushing and the cross shaft ball joint as described above. Summary of the invention

[0009] Technical issues

[0010] The present invention is proposed to solve the above-mentioned problems, and its purpose is to provide a caulking type sliding bushing and a manufacturing method thereof, which can improve the absorption performance of the vibration and impact generated by the inner sleeve during rotation and swinging motion and the durability of the components, and reduce the manufacturing cost by simplifying the composition and assembly structure of the components, and improve the vehicle assembly performance by shortening the length of the inner sleeve.

[0011] Technical Solution

[0012] The caulking type sliding bushing of the present invention for achieving the purpose as described above comprises: an inner sleeve made of metal material, which is composed of a ball portion and a first stud portion and a second stud portion extending toward the upper and lower sides of the ball portion; a ball seat, which surrounds the outer surface of the inner sleeve and is made of plastic material to absorb vibration and impact caused by the rotational movement of the inner sleeve; an intermediate sleeve made of metal material, which surrounds the outer surface of the ball seat and supports the ball seat; a buffer component, which surrounds the outer surface of the intermediate sleeve and is made of rubber material to absorb vibration and impact caused by the swinging movement of the inner sleeve; an outer sleeve made of metal material, which surrounds the outer surface of the buffer component and supports the buffer component; and a pair of plug-in integrated oil seals, which are assembled through the outer surface of the end of the inner sleeve, the end surface of the ball seat and the inner surface of the end of the intermediate sleeve, and are fitted and fixed by a caulking portion formed by bending the end of the intermediate sleeve.

[0013] The inner surface of the ball seat may be in contact with the outer surfaces of the ball portion of the inner sleeve, the first stud portion, and the second stud portion.

[0014] When the inner sleeve performs a swinging motion, the inner sleeve, the ball seat, the intermediate sleeve and the plug-in integrated oil seal can perform a swinging motion together as an integrated component, and the buffer component absorbs vibration and impact generated when the integrated component performs a swinging motion.

[0015] The plug-in integrated oil seal may include: a pair of plugs, contacting the end surface of the ball seat and the inner surface of the end of the intermediate sleeve; and a pair of oil seals, which are integrally equipped with the plug and contacting the outer surface of the end of the inner sleeve and the end surface of the ball seat, wherein a caulking portion formed by bending the end of the intermediate sleeve fits the end surface of the plug, the inner end of the caulking portion abuts against the outer end of the oil seal and fits each other, and the caulking portion and the oil seal surround the plug and seal it.

[0016] An end surface of the caulking portion and an end surface of the oil seal may be located at the same height and form a plane connected to each other.

[0017] The manufacturing method of the caulking type sliding bushing of the present invention includes the following steps: rubber vulcanization, injection molding a rubber buffer component between an intermediate sleeve and an outer sleeve arranged on the outside thereof; assembling a ball seat made of plastic material, the ball seat surrounds the ball portion of the inner sleeve and the outer surfaces of the first stud portion and the second stud portion extending toward the upper and lower sides of the ball portion; inserting the assembly of the inner sleeve and the ball seat into the inner side of the intermediate sleeve; assembling a pair of plug-in integrated oil seals through the outer surface of the end of the inner sleeve, the end surface of the ball seat and the inner surface of the end of the intermediate sleeve; and caulking the gap by bending the end of the intermediate sleeve so that the end fits against the end surface of the plug-in integrated oil seal.

[0018] Technical Effects

[0019] According to the caulking type sliding bushing and its manufacturing method of the present invention, the durability of the component is enhanced by arranging a ball seat made of plastic material between the inner sleeve and the middle sleeve for absorbing the rotational movement of the inner sleeve, and the riding feel is improved by arranging a buffer component made of rubber material between the middle sleeve and the outer sleeve for absorbing the swinging movement of the inner sleeve.

[0020] In addition, by assembling plug-in integrated oil seals at both ends of the ball seat and performing caulking and sealing treatment on both ends of the intermediate sleeve, the manufacturing cost can be reduced by simplifying the component composition and assembly structure, and the vehicle assembly performance can be improved by shortening the length of the inner sleeve.

[0021] In addition, the ball seat made of plastic material is constructed to not only surround the ball portion of the inner sleeve, but also surround and support the first stud portion and the second stud portion composed of straight sections. Therefore, when the inner sleeve rotates and swings, the entire section of the inner sleeve can be supported with higher strength, so that the inner sleeve, the ball seat and the intermediate sleeve can swing as a whole. This swinging motion is constructed to be absorbed by a buffer component made of rubber material provided on its outside, so as to more effectively reduce vibration and noise by eliminating friction and collision factors between the constituent components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a cross-sectional view of a conventional sliding bushing.

[0023] Figure 2 It is a cross-sectional view of a conventional cross-axis ball joint.

[0024] Figure 3 It is a cross-sectional view of a caulking type sliding bushing of the present invention.

[0025] Figure 4 It is an exploded cross-sectional view for explaining the manufacturing process of the caulking type sliding bushing according to the present invention.

[0026] Figure 5 is a flowchart showing a method for manufacturing a caulking type sliding bushing according to the present invention.

[0027] Description of Reference Numerals

[0028] 10: Bushing 11: Inner sleeve

[0029] 12: Outer sleeve 13: Rubber parts

[0030] 20: Cross-axis ball joint 21: Pillow ball

[0031] 21a: Spherical portion 21b: First connecting portion

[0032] 21c: Second connection part 22: Ball seat

[0033] 23: Ball socket 23a: Sheath fastening part

[0034] 24: plug 24a: sheath fastening part

[0035] 25-1, 25-2: Sheath 26-1, 26-2: First fastening ring

[0036] 27-1, 27-2: Second fastening ring 100: Caulking type sliding bushing

[0037] 110: Inner sleeve 111: Ball

[0038] 112: First stud 113: Second stud

[0039] 120: ball seat 121: ball support

[0040] 122: First stud support portion 123: Second stud support portion

[0041] 130: Middle sleeve 131-1: First caulking part

[0042] 131-2: Second caulking portion 131-1': One end portion of the middle sleeve

[0043] 131-2': The other end of the intermediate sleeve 140-1: The first plug integrated oil seal

[0044] 140-2: Second plug integrated oil seal 140a, 140b: Bend portion

[0045] 141-1: first plug 141-2: second plug

[0046] 142-1: First oil seal 142-2: Second oil seal

[0047] 150: Buffer component 160: Outer sleeve

[0048] C: Center axis

[0049] Best Mode for Carrying Out the Invention

[0050] Hereinafter, the structure and function of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, when directions are mentioned in this specification, "inner side" refers to the centripetal direction toward the central axis C, "outer side" refers to the centrifugal direction which is the opposite direction to the direction toward the central axis C, and "end" refers to the upper end and the lower end of the sliding bushing 100 in the length direction, respectively.

[0051] Reference Figure 3 and Figure 4The caulking type sliding bushing 100 of the present invention is composed of: an inner sleeve 110 (Inner sleeve) made of metal; a ball seat 120 (Ball seat) made of plastic material, surrounding the inner sleeve 110; an intermediate sleeve 130 (Middle sleeve) made of metal material, surrounding the ball seat 120; a buffer component 150 made of rubber material, surrounding the intermediate sleeve 130; an outer sleeve 160 (Outer sleeve) made of metal material, surrounding the buffer component 150; and a pair of plug-in integrated oil seals 140-1, 140-2, which are used to prevent leakage of the lubricant filled between the outer surface of the inner sleeve 110 and the inner surface of the ball seat 120 while fixing and supporting the ball seat 120 and the intermediate sleeve 130.

[0052] The inner sleeve 110 can rotate and swing by being connected to a member constituting a suspension device of a vehicle, and is composed of a ball portion 111 whose outer surface is formed into a convex spherical shape, and a first stud portion 112 and a second stud portion 113 respectively extending to the upper side and the lower side of the ball portion 111 and formed into a cylindrical shape. Oil seal coupling grooves 112a and 113a for receiving oil seals 142-1 and 142-2 are formed on the outer surface of the end of the first stud portion 112 and the outer surface of the end of the second stud portion 113.

[0053] The ball seat 120 surrounds the inner sleeve 110 and is made of plastic material to absorb vibration and impact generated by the rotational movement of the inner sleeve 110 and to absorb the lateral pressure exerted by the inner sleeve 110 .

[0054] The ball seat 120 can be composed of a ball support portion 121 in contact with the ball portion 111, a first stud portion support portion 122 in contact with the first stud portion 112, and a second stud portion support portion 123 in contact with the second stud portion 123, so as to be able to contact the ball portion 111, the first stud portion 112 and the second stud portion 113 of the inner sleeve 110 through their outer surface.

[0055] The ball seat 120 may be made of a plastic material and may be assembled by being inserted into the outer surface of the inner sleeve 110 after being separately molded, or may be injection molded on the outer surface of the inner sleeve 110 .

[0056] By arranging the ball seat 120 made of plastic material on the outer surface of the inner sleeve 110, the ball seat 120 is not easily damaged even under continuous vibration and impact caused by the rotation and swinging movement of the inner sleeve 110, so the durability of the ball seat 120 can be enhanced.

[0057] In addition, the ball seat 120 made of plastic material can be configured to not only surround the ball portion 111 of the inner sleeve 110, but also surround the first stud portion 112 and the second stud portion 113 whose cross-sectional shape is a straight section, and can support them while surrounding them, so that the inner surface of the ball seat 120 can ensure a wider contact area by spanning the outer surfaces of the ball portion 111, the first stud portion 112, and the second stud portion 113 of the inner sleeve 110. Therefore, when the inner sleeve 110 rotates and swings, the ball seat 120 can support the entire section of the inner sleeve 110 with higher strength.

[0058] The intermediate sleeve 130 supports the outer surface of the ball seat 120 and is sandwiched between the outer surface of the ball seat 120 and the inner surface of the buffer component 150 to support the inner surface of the buffer component 150 .

[0059] The two ends 131-1', 131-2' of the intermediate sleeve 130 are caulked to form curved caulking portions 131-1, 131-2, so as to fix and support a pair of plug-in integrated oil seals 140-1, 140-2. The inner surfaces of the two ends of the intermediate sleeve 130 are formed with plug-in coupling grooves 130a, 130b for the plugs 141-1, 141-2 to be placed.

[0060] The plug-in integrated oil seals 140 - 1 , 140 - 2 are assembled through the outer surface of the end of the inner sleeve 110 , the end surface of the ball seat 120 , and the inner surface of the end of the intermediate sleeve 130 , and are pressurized and fixed by the caulking parts 131 - 1 , 131 - 2 of the intermediate sleeve 130 .

[0061] The plug-in integrated oil seals 140-1, 140-2 are composed of a pair of plugs 141-1, 141-2 that are in contact with the end surface of the ball seat 120 and the inner surface of the end of the intermediate sleeve 130, and a pair of oil seals 142-1, 142-2 that are formed as a whole with the plugs 141-1, 141-2 and are in contact with the outer surface of the end of the inner sleeve 110 and the end surface of the ball seat 120.

[0062] Concave curved portions 140a and 140b may be formed on the inner surfaces of the pair of oil seals 142-1 and 142-2 so as to elastically deform when in contact with oil seal coupling grooves 112a and 113a formed on the outer surface of the end of the inner sleeve 110, thereby increasing the fitting force.

[0063] The caulking portions 131-1, 131-2 formed by bending the end portions 131-1', 131-2' of the intermediate sleeve 130 can fit against the end surfaces of the plugs 141-1, 141-2, the inner ends of the caulking portions 131-1, 131-2 can abut against the outer ends of the oil seals 142-1, 142-2 and fit against each other, the caulking portions 131-1, 131-2 and the oil seals 142-1, 142-2 can form a structure that surrounds the plugs 141-1, 141-2 and seals them, thereby more reliably preventing the leakage of the lubricant.

[0064] As described above, the sealing process is completed by assembling the plug-in integrated oil seals 140-1 and 140-2 and caulking the ends 131-1' and 131-2' of the intermediate sleeve 130, thereby reducing the manufacturing cost by simplifying the component composition and assembly structure, and since the sealing structure of the component can be achieved only by caulking, it is similar to Figure 2 Compared with the prior art shown, the vehicle assembly performance can be improved by shortening the length of the inner sleeve 110 .

[0065] In addition, if the inner ends of the caulking portions 131-1 and 131-2 abut against the outer ends of the oil seals 142-1 and 142-2, the end surfaces of the caulking portions 131-1 and 131-2 and the end surfaces of the oil seals 142-1 and 142-2 can be located at the same height and form planes connected to each other, thereby forming a smooth appearance.

[0066] The buffer member 150 surrounds the middle sleeve 130 and is made of a rubber material to absorb vibration and shock caused by the swinging motion of the inner sleeve 110 while absorbing surface pressure in the axial direction and the lateral direction, thereby playing a function of improving riding comfort.

[0067] The outer sleeve 160 may be made of metal material to support the outer surface of the buffer component 150 and may be configured to be fixed to the body of the vehicle.

[0068] When the inner sleeve 110 performs a swinging motion, the inner sleeve 110, the ball seat 120, the intermediate sleeve 130 and the plug-in integrated oil seals 140-1 and 140-2 perform a swinging motion together as an integrated component, and the buffer component 150 can absorb the vibration and impact generated by the integrated component during the swinging motion.

[0069] As described above, the ball seat 120 made of plastic material not only surrounds the ball portion 111 of the inner sleeve 110, but also surrounds the first stud portion 112 and the second stud portion 113 whose cross-sectional shape is a straight section, and supports them while surrounding them, so that when the inner sleeve 110 rotates and swings, the entire section of the inner sleeve 110 can be supported with higher strength, so that the inner sleeve 110, the ball seat 120 and the intermediate sleeve 130 can swing as a whole. In addition, this swinging motion is configured to be absorbed by the buffer member 150 made of rubber material provided on the outside thereof, so as to more effectively reduce the generation of vibration and noise by eliminating the friction and collision factors between the components.

[0070] If it is assumed that the ball seat 120 only surrounds and supports the ball portion 111 of the inner sleeve 110, then when the inner sleeve 110 performs a swinging motion, the ball seat 120 and the intermediate sleeve 130 will not be able to swing together with the inner sleeve 110, or the range of the swinging motion will be limited to a small extent, so that the absorption performance of the vibration and impact caused by the swinging motion of the inner sleeve 110 is reduced, and because the inner sleeve 110, the ball seat 120 and the intermediate sleeve 130 cannot move as a whole but move separately, there are friction and collision factors between these components, which may cause vibration and noise.

[0071] Below, refer to Figure 4 and Figure 5 A method for manufacturing the caulking type sliding bushing 100 according to the present invention will be described.

[0072] First, a rubber vulcanization step is performed to injection-mold the cushioning member 150 made of rubber between the middle sleeve 130 and the outer sleeve 160 provided on the outer side thereof (S1).

[0073] As a separate process from step S1, a ball seat 120 made of plastic material is assembled so as to surround the ball portion 111 of the inner sleeve 110 and the outer surfaces of the first stud portion 112 and the second stud portion 113 extending toward the upper side and the lower side of the ball portion 111 (S2). The ball seat 120 made of plastic material can be assembled by being inserted into the outer surface of the inner sleeve 110 after being separately molded, or can be injection molded on the outer surface of the inner sleeve 110.

[0074] The order of step S1 and step S2 may also be different.

[0075] As a next step, assembly is performed by inserting the assembly of the inner sleeve 110 and the ball seat 120 into the inner side 130 a of the middle sleeve 130 ( S3 ).

[0076] Then, the oil seals 140 - 1 and 140 - 2 are assembled through the outer surface of the end of the inner sleeve 110 , the end surface of the ball seat 120 , and the inner surface of the end of the intermediate sleeve 130 ( S4 ).

[0077] As a final step, the caulking portions 131 - 1 and 131 - 2 are formed by bending the end portions of the intermediate sleeve 130 so that the caulking portions 131 - 1 and 131 - 2 are attached to the end surfaces of the plug-in-integrated oil seals 140 - 1 and 140 - 2 .

[0078] As described above, the present invention is not limited to the above-mentioned embodiments. Without departing from the technical idea of ​​the present invention claimed for protection in the claims, ordinary technicians in the technical field to which the present invention belongs can implement obvious modifications, and these modified implementations belong to the scope of the present invention.

Claims

1. A caulking type sliding bushing, It is characterized in that include: The inner sleeve is made of metal and is composed of a ball portion and a first stud portion and a second stud portion extending toward the upper side and the lower side of the ball portion; a ball seat, surrounding the outer surface of the inner sleeve and made of a plastic material to absorb vibration and impact caused by the rotational movement of the inner sleeve; An intermediate sleeve made of metal material, surrounding the outer surface of the ball seat and supporting the ball seat; a buffer component, surrounding the outer surface of the intermediate sleeve and made of rubber material, to absorb vibration and impact caused by the swinging movement of the inner sleeve; An outer sleeve made of metal material, surrounding the outer surface of the buffer component and supporting the buffer component; as well as A pair of plug-in integrated oil seals are assembled through the outer surface of the end of the inner sleeve, the end surface of the ball seat and the inner surface of the end of the intermediate sleeve, and are fitted and fixed by a caulking portion formed by bending the end of the intermediate sleeve.

2. The caulking type sliding bushing according to claim 1, It is characterized in that The inner surface of the ball seat is in contact with the outer surfaces of the first stud portion and the second stud portion via the ball portion of the inner sleeve.

3. The caulking type sliding bushing according to claim 2, It is characterized in that When the inner sleeve performs a swinging motion, the inner sleeve, the ball seat, the intermediate sleeve and the plug-in integrated oil seal perform a swinging motion together as an integrated component. The buffer component absorbs vibration and impact generated when the integrated component performs a swinging motion.

4. The caulking type sliding bushing according to claim 1, It is characterized in that The plug-in integrated oil seal comprises: a pair of plugs contacting the end surface of the ball seat and the inner surface of the end of the intermediate sleeve; and A pair of oil seals are provided as a single piece with the plug and contact the outer surface of the end of the inner sleeve and the end surface of the ball seat. The caulking portion formed by bending the end of the intermediate sleeve fits the end surface of the plug, the inner end of the caulking portion abuts against the outer end of the oil seal and fits each other, and the caulking portion and the oil seal surround the plug and seal it.

5. The caulking type sliding bushing according to claim 4, It is characterized in that An end surface of the caulking portion and an end surface of the oil seal are located at the same height and form a plane connected to each other.

6. A method for manufacturing a caulking type sliding bushing, It is characterized in that The steps include: Rubber vulcanization, injection molding a rubber buffer component between the middle sleeve and the outer sleeve provided on the outside thereof; Assembling a ball seat made of plastic material, the ball seat surrounds the ball portion of the inner sleeve and the outer side surfaces of the first stud portion and the second stud portion extending toward the upper side and the lower side of the ball portion; Inserting the assembly of the inner sleeve and the ball seat into the inner side of the intermediate sleeve; Assembling a pair of plug-in integrated oil seals through the outer surface of the end of the inner sleeve, the end surface of the ball seat, and the inner surface of the end of the intermediate sleeve; and The end of the intermediate sleeve is bent so that the end is fitted to the end surface of the plug-in-integrated oil seal to perform caulking.

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