KR20210036560A - Spring lower seat of strut for vehicle - Google Patents

Abstract

The present invention relates to a spring lower seat of a strut for a vehicle. The spring lower seat of a strut for a vehicle includes: a lower seat part having a pad placement part formed therein; a stopper part connected with the lower seat part, and formed at an end of the pad placement part to be projected; a lower pad part including an elastic material to be combined with the pad placement part, and having a coil spring placed therein; and a stopper pad part formed at an end of the lower pad part to be projected upward, and having one side coming in contact with the stopper part, and having the other side coming in contact with an end of the coil spring. The stopper part includes: a spring support part formed on the lower seat part to be projected upward, and coming in surface contact with one end in a circumferential direction of the stopper pad part; and a sliding prevention holder part formed in an upper part of the spring support part to be projected in a circumferential direction, and coming in contact with an upper part of the stopper pad part.

Description

SPRING LOWER SEAT OF STRUT FOR VEHICLE}

The present invention relates to a spring lower seat for a vehicle strut, and more particularly, to a spring lower seat for a vehicle strut provided in a strut device that implements a suspension function by a shock absorber and a coil spring.

In general, the vehicle suspension system effectively buffers irregular inputs on the road surface generated during the driving of the vehicle to improve ride comfort, and provides driving convenience by appropriately controlling the vibration of the vehicle body caused by the driver's driving behavior and the bend of the road surface. Performs a function.

The strut type suspension includes a shock absorber, a spring lower seat fixed to the middle of the shock absorber, a spring upper seat attached to the tip of the pitton rod of the shock absorber, and a spring upper seat to reduce lateral load. It has a structure including a side load coil spring interposed between the and the spring lower seat.

When assembling the side rod coil spring between the spring upper seat and the spring lower seat, in a state in which the side rod coil spring is seated in an inclined position on the spring lower seat, more specifically, the lower end of the side rod coil spring is attached to the spring lower seat. A process of applying a compressive force is performed while seated in the middle of the provided elastic pad.

However, if compression force is applied to the side rod coil spring while the coil spring is initially seated in the middle of the elastic pad, the elastic pad is generated by the compression force transmitted through the side rod coil spring while the side rod coil spring is compressed. As is elongated, the end of the elastic pad is bent and deformed, and a phenomenon of bending or folding occurs.

As a result, there is a problem that the elastic pad does not properly perform the function of making elastic contact with the side rod coil spring, and the end of the elastic pad interferes with the side rod coil spring, resulting in frequent assembly failures. Therefore, there is a need to improve this.

An object of the present invention is to provide a spring lower seat for a vehicle strut capable of improving assembly defects due to an arbitrary deformation of an end portion of an elastic pad during compression assembly of a side rod coil spring.

The spring lower seat of the vehicle strut according to the present invention comprises: a lower seat portion having a pad seating portion formed thereon; A stopper portion connected to the lower seat portion and protruding from an end portion of the pad seat portion; A lower pad part including an elastic material and which is coupled to the pad seating portion and on which the coil spring is seated; And a stopper pad portion formed to protrude upward from an end portion of the lower pad portion, one side portion in contact with the stopper portion and the other side portion in contact with the end portion of the coil spring, wherein the stopper portion is upward on the lower seat portion. A spring support portion formed to protrude and in surface contact with one end portion in the circumferential direction of the stopper pad portion; And a sliding prevention holder part formed to protrude in a circumferential direction at an upper end of the spring support part and in contact with an upper end of the stopper pad part.

The stopper pad portion is formed to protrude upward from an end of the lower pad portion, a circumferential end portion is in surface contact with the spring support portion, an upper end portion is in contact with the anti-slip holder portion, and the other end in a circumferential direction is in contact with the coil spring. Bullet joints; And a spreading constraining jaw portion formed to protrude in a circumferential direction from a radially inner end of the spring tangent portion and in contact with the radially inner end of the stopper portion.

The stopper pad portion may further include a push clearance groove formed to be recessed at a boundary portion between the spring contact portion and the lower pad portion.

The lower seat part may include a seat body part in which the pad seating part is formed; A first assembly hole formed to pass through the pad seating portion and into which one side of the lower pad portion is assembled; And a second assembly hole portion disposed on the pad seating portion to be spaced apart from the first assembly hole portion, and to which the other side portion of the lower pad portion is assembled.

The lower pad unit includes: a pad body including an elastic material and extending in an arc shape in which a lower portion of the coil spring can be seated; A first assembly protrusion formed to protrude on the pad main body and assembled through the first assembly hole; And a second assembly protruding portion formed to protrude on the pad body portion and assembled through the second assembly hole portion.

The lower pad part further comprises a seating guide groove formed to be recessed in an arc shape along the extending direction of the coil spring on the pad body part.

The lower seat portion may further include a slip prevention protrusion formed to protrude inward toward the pad seating portion at a position corresponding to the outer diameter portion of the pad seating portion.

The lower pad portion is formed to be recessed in a shape corresponding to the anti-pushing protrusion on the outer diameter portion of the pad main body, and a push-preventing groove portion in contact with the push-preventing protrusion; characterized in that it further comprises.

The spring lower seat of the vehicle strut according to the present invention can secure assembling property with the coil spring by restricting the movement of the end of the coil spring by the stopper part, and the end of the coil spring made of metal by the stopper pad part. It is possible to prevent the stopper from being in direct contact.

In addition, in the present invention, when compression assembly with the coil spring seated on the lower pad portion, the stopper pad portion interlocks with the elongation of the lower pad portion due to the contact force between the stopper portion and the stopper pad portion, and its position is arbitrarily moved or flexed. Can be prevented.

Therefore, the present invention can stably perform the function of preventing the stopper pad part from directly contacting the end of the coil spring of the metal material and the stopper part, and the end of the stopper pad part is moved or deformed to interfere with the coil spring, thereby assembling It is possible to prevent defects from occurring.

1 is a perspective view schematically showing a spring lower seat of a vehicle strut according to an embodiment of the present invention.
FIG. 2 is a perspective view schematically showing a spring lower seat of a vehicle strut according to an embodiment of the present invention from a direction different from that of FIG. 1.
3 is a plan view schematically showing a spring lower seat of a vehicle strut according to an embodiment of the present invention.
4 is an exploded perspective view schematically illustrating a spring lower seat of a vehicle strut according to an embodiment of the present invention.
5 is an enlarged view of part A of FIG. 1.
6 is an enlarged view of part B of FIG. 2.
7 is a cross-sectional view taken along line C-C' of FIG. 3.
8 is an assembly state diagram showing a state in which a coil spring is seated on a spring lower seat of a vehicle strut according to an embodiment of the present invention.
9 is an assembled state diagram showing a state in which a compressive force is applied to the coil spring in the state shown in FIG. 8.

Hereinafter, an embodiment of a spring lower seat for a vehicle strut according to the present invention will be described with reference to the accompanying drawings. In this process, thicknesses of lines or sizes of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

1 is a perspective view schematically showing a spring lower seat of a vehicle strut according to an embodiment of the present invention, and FIG. 2 is a schematic view of a spring lower seat of a vehicle strut according to an embodiment of the present invention in a different direction from FIG. 1 3 is a plan view schematically showing a spring lower seat of a vehicle strut according to an embodiment of the present invention.

1 to 3, a spring lower seat 1 of a vehicle strut according to an embodiment of the present invention includes a lower seat part 10, a stopper part 20, a lower pad part 30, and a stopper pad part. It includes (40).

The lower seat portion 10 is a device that forms the basic frame of the spring lower seat 1 according to the present invention, and includes a metal material, and has a circular or ring shape extending along the circumference of a shock absorber (not shown). It has the structure of the base plate. A pad seating portion 12 to which the lower pad portion 30 can be seated and coupled to the lower seat portion 10 is formed on the lower seat portion 10.

The stopper part 20 is a device part for restraining the movement of the end of the coil spring 2 (see FIGS. 8 and 9), and is integrally connected with the lower seat part 10, and the end of the pad seating part 12 Is formed to protrude upward. The stopper part 20 is formed integrally with the lower seat part 10 by punching a part of the lower seat part 10 including a metal material into a shape corresponding to the edge part of the stopper part 20 and then bending upwards. can do.

The lower pad part 30 is a device part for preventing noise and damage due to direct contact of the coil spring 2 made of metal with the lower seat part 10 made of metal, and includes a pad seating part including an elastic material such as rubber. Is bound to (12). The lower pad part 30 has a length corresponding to a winding of 0.5 or more to 0.7 or less of the coil spring 2, that is, an angle of 90° or more to 130° or less based on the center of the lower seat part 10 It has an arc shape that extends to a length of The lower part of the coil spring 2 is seated on the upper part of the lower pad part 30.

The stopper pad part 40 is a device part for preventing direct contact between the end of the coil spring 2 and the stopper part 20, and is formed to protrude upward from the end of the lower pad part 30. In a state in which the coil spring 2 is assembled, one circumferential side of the pad spotter 40 is in contact with the stopper 20, and the other side is in contact with the end of the coil spring 2 (see FIG. 9). The stopper pad portion 40 may be integrally molded with the lower pad portion 30.

4 is an exploded perspective view schematically illustrating a spring lower seat of a vehicle strut according to an embodiment of the present invention.

4, the lower seat portion 10 according to an embodiment of the present invention includes a seat body portion 11, a first assembly hole 13, a second assembly hole 14, and a third assembly hole 15. ), including the anti-going protrusion (16).

The seat body 11 is a device that forms the basic frame of the lower seat 10 and has a structure of a support plate having a circular or ring shape. A pad seating portion 12 is formed at an intermediate portion in the radial direction of the seat body portion 11. The inner diameter portion of the seat body 11 positioned radially inside the pad seating portion 12 is in contact with the shock absorber. The outer diameter portion of the seat body 11 positioned radially outward of the pad seating portion 12 has a shape bent upwardly so as to cover the lower portion of the coil spring 2.

A first assembly hole 13, a second assembly hole 14, and a third assembly hole 15 are formed on the pad seating portion 12 to penetrate in the vertical direction. The first assembly hole 13, the second assembly hole 14, and the third assembly hole 15 are disposed at positions corresponding to one end, the middle, and the other end of the lower pad part 30 in the extension direction, respectively. .

On the lower pad part 30, a first assembly protrusion 33, a second assembly protrusion 34 at positions corresponding to the first assembly hole 13, the second assembly hole 14, and the third assembly hole 15. , The third assembly protrusion 35 is formed, respectively. The first assembly hole 13, the second assembly hole 14, and the third assembly hole 15 are fitted with the first assembly protrusion 33, the second assembly protrusion 34, and the third assembly protrusion 35. By doing so, it is possible to accurately assemble and bind the lower pad part 30 on the set position corresponding to the pad seating part 12.

The anti-slip protrusion 16 is formed to protrude inward toward the pad seating portion 12 at a position corresponding to the outer diameter portion of the pad seating portion 12. In other words, the anti-slip protrusion 16 is formed to protrude inward at the boundary between the middle portion of the sheet body 11 and the outer diameter portion of the sheet body 11 having a shape extending upward.

A plurality of anti-pushing protrusions 16 are disposed to be spaced apart from each other along the extending direction of the pad seating part 12. Each of the plurality of anti-pushing protrusions 16 is formed to extend in an arc shape centered on the central portion of the sheet body 11. The anti-pushing protrusion 16 may be formed by pressing a part of the sheet body 11, and the edge portion forms a smooth curved surface by minimizing stress concentration due to the press processing.

5 is an enlarged view of part A of FIG. 1, FIG. 6 is an enlarged view of part B of FIG. 2, and FIG. 7 is a cross-sectional view taken along line C-C' of FIG. 3.

5 to 7, the stopper part 20 according to an embodiment of the present invention includes a spring support part 21 and a slip prevention holder part 22.

The spring support portion 21 is formed to protrude upward on the lower seat portion 10 and is in surface contact with one end portion in the circumferential direction of the stopper pad portion 40. The anti-sliding holder 22 is formed to protrude in the circumferential direction at the upper end of the spring support 21 and is in contact with the upper end of the stopper pad 40. The spring support part 21 and the anti-pushing holder part 22 are in frictional contact and surface contact with a stopper pad part 40 made of an elastic material in the circumferential direction and the axial direction, respectively.

8 is an assembly state diagram showing a state in which a coil spring is seated on a spring lower seat of a vehicle strut according to an embodiment of the present invention, and FIG. 9 is a state in which a compressive force is applied to the coil spring in the state shown in FIG. It is an assembly state diagram shown.

When the side rod coil spring is applied as the coil spring 2, as shown in FIG. 8, the coil spring 2 is seated in an inclined position on the lower pad part 30, and more specifically, a coil wound in a spiral shape. A process of applying a compressive force is performed while the lower end of the spring 2 is seated in the middle part of the lower pad part 30 in the extending direction. 8 and 9, reference numeral SC denotes the central axis of the coil spring 2.

If a compressive force is applied to the coil spring (2) while the coil spring (2) is initially seated in the middle of the lower pad (30), the coil spring (2) passes through the coil spring (2) while compression of the coil spring (2) is in progress. As the length of the lower pad part 30 made of an elastic material is elongated by the transmitted compression force, the stopper pad part 40 connected to the end of the lower pad part 30 is pushed toward the spring support part 21.

At this time, the stopper pad part 40 is in the circumferential direction by the spring support part 21 while maintaining frictional contact and surface contact with the spring support part 21 and the slip prevention holder part 22 in the circumferential and axial directions. At the same time, the push in the axial direction is constrained by the push-preventing holder part 22 at the same time. By this action, in a state in which the compression assembly of the coil spring 2 is completed, the state in which the stopper pad part 40 is disposed between the coil spring 2 and the stopper part 20 as shown in FIG. You can keep it stable.

Accordingly, when the coil spring 2 is compressed and assembled, it is possible to prevent the stopper pad portion 40 from being arbitrarily moved or deflected by interlocking with the elongation of the lower pad portion 30. Accordingly, the stopper pad portion 40 can stably perform a function of preventing direct contact between the end of the coil spring 2 of a metal material and the stopper portion 20. In addition, it is possible to prevent the stopper pad portion 40 from being moved or deformed to interfere with the coil spring 2, resulting in an assembly failure.

4, the lower pad part 30 according to an embodiment of the present invention includes a pad body part 31, a seating guide groove part 32, a first assembly protrusion 33, and a second assembly protrusion 34. , It includes a slip prevention groove (36).

The pad body portion 31 is made of an elastic material, and the lower portion of the coil spring 2 extends in a seatable arc shape. A seating guide groove 32 for guiding the seating of the coil spring 2 to a set position is formed on the upper surface of the pad main body 31. The seating guide groove 32 has a semicircular cross-sectional shape, and the seating guide groove 32 is formed to be recessed in an arc shape along the extending direction of the coil spring 2.

When the coil spring 2 is seated on the pad main body 31 as shown in FIG. 8, the lower end of the coil spring 2 is naturally inserted into the seating guide groove 32 and disposed at the setting position. While the compression force is applied to the coil spring 2, the diameter of the coil spring 2 gradually expands and is continuously seated along the seating guide hole 32 as shown in FIG. 9.

A first assembly protrusion 33, a second assembly protrusion 34, and a third assembly protrusion 35 are formed on the pad body 31 to protrude. The first assembly protrusion 33, the second assembly protrusion 34, and the third assembly protrusion 35 are disposed to be spaced apart at a set interval, respectively, the first assembly hole 13, the second assembly hole 14, It is assembled through the third assembly hole 15.

The first assembly protrusion 33, the second assembly protrusion 34, and the third assembly protrusion 35 are inserted into the first assembly hole 13, the second assembly hole 14, and the third assembly hole 15, respectively. By assembling, the lower pad part 30 can be stably bound to the lower seat part 10 over the entire length.

As the first assembly protrusion 33 and the second assembly protrusion 34 include an elastic material, the first assembly protrusion 33 and the second assembly protrusion 34 are replaced with the first assembly hole 13 and the second assembly protrusion. In a state assembled in the assembly hole 14, the first assembly protrusion 33, the second assembly protrusion 34, the first assembly hole 13, and the second assembly hole 14 are elastically pressed and rubbed against each other. Contacted.

The second assembly protrusion 34 is located in the middle portion of the lower pad 30 in the extending direction. Accordingly, when the coil spring 2 is seated and compressed in the middle part of the lower pad part 30, the second assembly protrusion 34 is used as a reference, and it is stretched to one side in the circumferential direction and stretched to the other side in the circumferential direction. Deformation occurs.

In addition, the first assembly protrusion 33 is located at one end in the extending direction of the lower pad portion 30 connected to the stopper pad portion 40. When extending one side of the lower pad part 30 due to the compressive force of the coil spring 2, free extension toward the stopper pad part 40 by the binding force between the first assembly protrusion 33 and the first assembly hole 13 And jungle is interfered. Accordingly, it is possible to further reduce the degree of elongation and push that are transmitted and accumulated to the stopper pad unit 40.

The slip prevention groove 36 is formed to be recessed in a shape corresponding to the slip prevention protrusion 16 on the outer diameter portion of the pad main body 31. The slip preventing groove 36 is formed in a shape corresponding to each of the pushing preventing protrusions 16 at positions corresponding to each of the plurality of pushing preventing protrusions 16. The slip prevention groove 36 is in continuous frictional contact with the slip prevention protrusion 16 formed to extend in an arc shape in a circumferential direction.

At this time, the anti-pushing groove part 36 is not simply in contact with the anti-pushing protrusion in the radial direction, but in various directions, including the circumferential direction, corresponding to the normal direction of the edge of the anti-pushing protrusion 16. Is in frictional contact with. The outer diameter portions of the lower seat portion 10 and the lower pad portion 30 may be in frictional contact with each other stably in the circumferential direction and in the radial direction by the slip prevention groove portion 36 and the slip prevention protrusion portion 16.

When the lower pad portion 30 is elongated due to the seating and compression of the coil spring 2, the slip prevention groove 36 is caught by the slip prevention protrusion 16, and the movement in the circumferential direction is interfered and restrained. Accordingly, it is possible to more alleviate the accumulation and increase of the pushing amount toward the end of the lower pad unit 30.

5 to 7, the stopper pad portion 40 according to an embodiment of the present invention includes a spring tangent portion 41, a spreading constraining jaw portion 42, and a sliding clearance groove portion 43.

The spring tangent part 41 is a device part contacting the stopper part 20 and the coil spring 2 and is formed to protrude upward from the end of the lower pad part 30. One end in the circumferential direction of the spring contact portion 41 is in surface contact with the spring support portion 21, the upper end is in contact with the anti-slip holder portion 22, and the other end in the circumferential direction is in contact with the coil spring (2).

The spreading constraining jaw portion 42 is formed to protrude in the circumferential direction from the radially inner end portion of the spring tangent portion 41 and is in contact with the radially inner end portion of the stopper portion 20. The spreading constraining jaw portion 42 is in frictional contact and surface contact with the inner end portion in the radial direction of the stopper portion 20. By the spreading constraining jaw portion 42, the spring tangent portion 41 may be restrained from moving and bending deformation in the radial direction.

The sliding clearance groove 43 is formed to be recessed at the boundary between the spring contact portion 41 and the lower pad portion 30. By forming the push clearance groove 43, the boundary portion between the spring tangent portion 41 and the lower pad portion 30 is relatively thinner than other portions, and elastic deformation can be made more easily than other portions. .

When the one end of the lower pad part 30 is pushed due to the compression of the coil spring 2, the boundary between the spring contact part 41 in which the push clearance groove 43 is formed is elastically compressed and deformed, and finally the spring contact part ( 41), the amount of jungle is further reduced. By this action, it is possible to more stably prevent the movement and deformation of the spring tangent part 41 due to the movement of one end of the lower pad part 30 and pushing.

According to the spring lower seat 1 of the strut for a vehicle according to the present invention having the above configuration, the movement of the end of the coil spring 2 is restrained by the stopper 20, thereby assembling the coil spring 2 The property can be secured, and it is possible to prevent the end of the metal coil spring 2 and the stopper part 20 from directly contacting by the stopper pad part 40.

In addition, according to the present invention, when the coil spring 2 is mounted on the lower pad part 30 and compressed and assembled, the stopper pad part 40 is formed by the contact force between the stopper part 20 and the stopper pad part 40. It is possible to prevent the position of the lower pad part 30 from being arbitrarily moved or bent and deformed by interlocking with the elongation of the lower pad part 30.

Therefore, according to the present invention, the stopper pad portion 40 can stably perform a function of preventing direct contact between the end of the coil spring 2 of a metal material and the stopper portion 20, and the stopper pad portion 40 The end of the is moved and deformed to interfere with the coil spring 2, thereby preventing assembly failure from occurring.

The present invention has been described with reference to the embodiments shown in the drawings, but these are only exemplary, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

1: spring lower seat 2: coil spring
10: lower seat part 11: seat body part
12: pad seating portion 13: first assembly hole portion
14: second assembly hole 15: third assembly hole
16: anti-going protrusion 20: stopper
21: spring support 22: slip prevention holder
30: lower pad part 31: pad body part
32: seating guide groove 33: first assembly protrusion
34: second assembly protrusion 35: third assembly protrusion
36: slip prevention groove 40: stopper pad portion
41: spring tangent portion 42: open constraining jaw portion
43: Jungle free groove

Claims (8)

A lower seat portion in which a pad seating portion is formed;
A stopper portion connected to the lower seat portion and protruding from an end portion of the pad seat portion;
A lower pad part including an elastic material and which is coupled to the pad seating portion and on which the coil spring is seated; And
A stopper pad portion formed to protrude upward from an end of the lower pad portion, one side portion in contact with the stopper portion, and the other side portion in contact with the end portion of the coil spring; and
The stopper part,
A spring support portion formed to protrude upward on the lower seat portion and in surface contact with one end portion in the circumferential direction of the stopper pad portion; And
A spring lower seat for a vehicle strut, comprising: a slip prevention holder portion formed to protrude in a circumferential direction at an upper end of the spring support portion and in contact with an upper end of the stopper pad portion.
The method of claim 1,
The stopper pad part,
A spring tangent portion formed to protrude upward from an end portion of the lower pad portion, a circumferential end portion in surface contact with the spring support portion, an upper end portion in contact with the anti-slip holder portion, and the other circumferential end portion in contact with the coil spring; And
A spring lower seat of a vehicle strut, comprising: a spreading restraining jaw portion formed to protrude in a circumferential direction from a radially inner end portion of the spring tangent portion, and in contact with the radially inner end portion of the stopper portion.
The method of claim 2,
The stopper pad part,
A spring lower seat for a vehicle strut, further comprising: a sliding clearance groove formed to be recessed at a boundary portion between the spring tangent portion and the lower pad portion.
The method of claim 1,
The lower seat part,
A seat body portion in which the pad seating portion is formed;
A first assembly hole formed to pass through the pad seating portion and into which one side of the lower pad portion is assembled; And
And a second assembly hole portion disposed on the pad seating portion to be spaced apart from the first assembly hole portion, and in which the other side portion of the lower pad portion is assembled.
The method of claim 4,
The lower pad part,
A pad body comprising an elastic material and extending in an arc shape in which a lower portion of the coil spring can be seated;
A first assembly protrusion formed to protrude on the pad main body and assembled through the first assembly hole; And
And a second assembly protruding portion formed to protrude on the pad body portion and assembled through the second assembly hole portion.
The method of claim 5,
The lower pad part,
A spring lower seat for a vehicle strut, further comprising: a seating guide groove formed on the pad body to be recessed in an arc shape along the extending direction of the coil spring.
The method of claim 4,
The lower seat part,
A spring lower seat for a vehicle strut, further comprising: a slip prevention protrusion formed to protrude inwardly toward the pad seat at a position corresponding to the outer diameter portion of the pad seat.
The method of claim 7,
The lower pad part,
A spring lower seat for a vehicle strut, further comprising: a slip preventing groove formed on the outer diameter portion of the pad body in a shape corresponding to the slip preventing protrusion and in contact with the pushing preventing protrusion.

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