KR102501742B1 - Direct injection integrated steering wheel damper and its manufacturing method - Google Patents

Abstract

The present invention relates to a steering wheel damper for a vehicle and a method for manufacturing the same, which is directly fixed to a steering wheel, and a plate having a plurality of through holes and a mass member having a predetermined weight and having a central pin to dampen vibration are sequentially put into a mold It is characterized in that it is made by direct injection of rubber to form a connecting member connecting the plate and the mass member and a cushion member for limiting the behavior of the mass member.
Accordingly, the manufacturing process is simplified, the productivity is improved, the plate, the mass member, and the connection member are firmly coupled, and the mass member is shaken while limiting the behavior so as not to collide with the surrounding counterpart parts, so that durability and marketability are good.

Description

Direct injection integrated steering wheel damper and its manufacturing method

The present invention relates to a damper assembled to a steering wheel, which is a steering device of a vehicle, to damp vibration transmitted to a steering wheel, and more specifically, by integrating a plate and a mass member in a direct injection method, the mass member is very robust. It is improved so that it is not separated even when it is coupled and the vehicle is shaken greatly, and does not cause noise and vibration by colliding with other parts around it.

As is well known, a steering wheel is a steering device that changes a driving direction (driving direction) by moving wheels of a vehicle left and right, and is used as a steering wheel, steering wheel, steering wheel, driving wheel, and the like.

The steering wheel, which is a handle (control panel) for driving a vehicle, has a rotational direction and a radial direction due to the condition of the road surface on which the vehicle is driven (hikes, holes), the structure of the body, the structure of the mounting system, and the unevenness of the tire (wheel) itself. As a result, various vibrations are generated, and these vibrations are transmitted to the steering wheel.

Vibration transmitted to the steering wheel is transmitted to the driver driving the vehicle, causing discomfort, thereby reducing ride quality, and fatigue due to continuous vibration accumulates, making it inconvenient to drive.

In addition, the steering system, which is a part of the steering wheel, is exposed to vibration for a long time, and its durability deteriorates. As a result, safety is reduced and it interferes with safe driving.

In order to solve the above problem, a damper composed of a mass (weight) is additionally assembled to the steering wheel to damp the transmitted vibration.

Such a conventional damper is coupled by bonding or assembling rubber that is positioned between a mass member and a plate to transmit vibrations to the damper.

However, the rubber adhesion method has many work steps such as shot, pretreatment, adhesive application, etc., and post-process to remove burrs after rubber adhesion, resulting in low productivity and over time, the adhesive dries and vibrates continuously. It is shaken and the mass member is separated.

In addition, the assembly method of fitting rubber products has a problem in that it is torn in contact with sharp edges or burrs during the fitting process, and if the fixation is not perfect and continues to shake, it is separated at some point.

In addition, as the vehicle is shaken greatly due to negative influences such as bumpy or hollow road surfaces, rough roads, strong winds, etc., the mass member is also shaken and separated from the plate or collides with other parts located nearby, causing noise and vibration. There is also the problem of damaging the .

Republic of Korea Patent Publication No. 10-2005-0066146

The present invention, devised to solve the above problems, provides an improved damper so that the mass member is firmly coupled and not separated, thereby damping vibration transmitted to the steering wheel and greatly reducing the vehicle due to negative effects such as rough road driving and strong wind. Its purpose is to be firmly coupled so that it does not collide with or separate from other parts due to shaking together when it is shaken, and to improve productivity by simplifying the production process.

In order to achieve the above object, the direct injection-integrated steering wheel damper and method of manufacturing the same of the present invention are located between a plate directly fixed to the steering wheel and a mass member for damping vibration, and a cushion for connecting a connecting member and a cushion for limiting movement By directly injecting the member from the mold to make an integral damper, the production process is simplified and productivity is good.

In addition, in the integrated damper made by direct injection, the connecting member firmly fixes and connects the plate and the mass member, so that the mass member does not separate from the plate, and the direct injection cushion member like the connecting member prevents the mass member from shaking excessively. It is characterized in that it has good marketability due to its high durability that limits the behavior (or movement radius) so as not to be separated from the connecting member and not to cause damage or damage by bumping into the surrounding counterpart parts.

The damper of the present invention dampens vibration transmitted to the steering wheel by providing a damper that is coupled by direct injection of rubber to a plate and a mass member in which a plurality of fixing holes are formed, thereby reducing the negative effects of driving on rough roads, strong winds, etc. It is strongly coupled so that the mass member does not collide with or separate from the other part due to shaking, so the durability is good, and the production process is simplified and the quality of the product is improved compared to the prior art, so productivity is improved.

1 is a state diagram in which a damper is assembled in the present invention
2 is a perspective view of a damper in the present invention
Figure 3 is an exploded perspective view of the damper in the present invention
4 is a front view of a damper in the present invention
Figure 5 is a partial cross-sectional view of AA in Figure 4
Figure 6 is a partial cross-sectional view of BB in Figure 4
Figure 7 is a partial cross-sectional view of CC in Figure 4
8 is an exemplary action view showing limiting the behavior of the damper in the present invention
Figure 9 is a flow chart showing the production process of the damper in the present invention

Hereinafter, a direct injection-integrated steering wheel damper and a manufacturing method thereof of the present invention will be described in detail, and this description is based on an embodiment for implementing the present invention, and the technical idea pursued by the present invention is described in this document It is not intended to be limited to the forms described in the embodiments described in, and it will be understood to include various modifications, equivalents and / or alternatives of the embodiments of the present invention.

In addition, even if the operational effects according to the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

The damper 1 of the present invention includes a metal plate 10 fixed to a steering wheel, a mass member 20 made of a sintered alloy having a predetermined weight and damping vibration, the plate 10 and the mass member 20 It consists of a connecting member 30 made of rubber material formed by injection so as to be connected, and a cushion member 40 made of rubber material that limits the movement of the mass member 20, and the upper end 31 of the connecting member 30 is a plate. It is characterized in that a part of the outer surface of (10) is fixed in a form of wrapping, and the lower end (35) is fixed and coupled to the inside of the mass member (20).

On both sides of the upper part of the plate 10, an assembly part 16 is formed that has an assembly hole 17 to be assembled to the steering wheel and is spaced apart by an appropriate distance so that there is no problem in assembly, and the assembly part 16 is connected to the front. A body portion 11 that is bent in an 'a' shape is formed.

The body part 11 has a main through-hole 12 that serves as a central axis so that the upper end 31 of the connecting member 30 is fixed and the connecting member 30 has a large area in contact with the plate 10 so that it can be firmly fixed. And an auxiliary through hole 15 surrounding the main through hole 12 is formed, and the upper end 31 extends from the plate 10 to a wider range to absorb vibration and improve fixation and bonding strength. A ball 13 is further formed.

In addition, a central through hole 14 is formed in the central portion of the body portion 11 so that the cushion member 40 for preventing collision by limiting the movement of the mass member 20 is fixed, and the main through hole 12 and Similarly, in order to firmly fix the cushion member 40 , an auxiliary through hole 15 surrounding the central through hole 14 is additionally formed.

The mass member 20 has a predetermined weight to damp vibration, and a fixing hole 21 having the same central axis as the main through hole 12 is formed, and the fixing hole 21 is fixed from the top and bottom sides toward the center of the inside. Inclined surfaces 22 are formed at a predetermined angle so that the diameter of the hole 21 decreases, and a barrier 23 fixing the lower end 35 of the connecting member 30 at the center point where the inclined surface 22 intersects formed.

In addition, on the front side of the mass member 20, a central pin 24 is formed on the same central axis as the central through hole 14 and has a diameter smaller than the inner diameter of the cushion member 40 and protrudes, so that the central through hole ( 14) is located inside the cushion member 40 fixed to.

The connecting member 30 is made of a rubber material having elasticity, and has an upper end 31 fixed to the plate 10 and a lower end fixed to the mass member 20 in order to fix and couple the plate 10 and the mass member 20 at the same time. (35), it is divided into a connection part (33) connecting the upper part (31) and the lower part (35).

The upper end 31 covers and wraps the outer part of the plate 10 and passes through the main through hole 12 and the auxiliary through hole 15 to cover and cover the outer part of the opposite side and is fixed while being injected in the form of being connected.

In addition, the extension part 32 located between the upper end part 31 and the upper end part 31 is connected to the body part 11 by covering and covering the outer part in the same way as the upper part 31 and connecting the through hole 13. Since the contact area is large, vibration transmitted to the plate 10 can be absorbed and transmitted, so that the vibration is effectively and firmly fixed.

The lower part 35 also has a wide contact area with the fixing hole 21 of the mass member 20, so it is easy to pass the vibration to the mass member 20, and according to the shape characteristics of the inclined surface 22, it is strongly contracted toward the central part and the bump 23 ) and is firmly fixed.

The connection part 33 is connected so that the plate 10 and the mass member 20 are spaced apart at a certain distance between the upper part 31 and the lower part 35, and the vibration absorbed by the upper part 31 and the expansion part 32 is transmitted to the mass It is transmitted to the member 20 to be attenuated.

The cushion member 40 has the same central axis as the central through hole 14 of the plate 10 and is fixed in a form surrounding a portion of the outer portion of the plate 10, but is also firmly fixed and separated by the auxiliary through hole 15 It prevents the movement of the mass member 20 so that it can be moved only in the inner space 41 so as not to cause or damage noise and vibration by colliding with the plate 10 or the surroundings while shaking greatly.

Looking at the manufacturing method and operation of the present invention configured as described above are as follows.

Put the prepared mass member 20 into the lower mold 70, raise the middle mold 60 and the plate 10 in turn, close the upper mold 50, and directly inject the rubber material so that the plate and the mass member are integrated. The damper (1) is made in the form of

More specifically, the mass member 20 is seated on the seating portion 71 of the lower mold 70, and the middle molding portion 61 of the middle mold 60 above it is fixed to the fixing hole of the mass member 20 ( 21), place it facing the inclined surface 22, and seat the plate 10 on the spaced part 62 located higher than the middle molding part 61.

When the middle mold 60 and the plate 10 are prepared, the upper mold 50 having the upper molding part 51 for molding the upper part 31, the expansion part 32, and the cushion member 40 is formed in the middle mold ( 60) to make the high-temperature rubber ready for injection molding.

When the rubber is injected, the empty space of the molds 50, 60, and 70 is filled to form the connecting member 30 and the cushion member 40.

The damper 1 in which the connection member 30 and the cushion member 40 are fixed and coupled by injection molding as described above is cooled by separating the damper 1 from the molds 50, 60, and 70.

More specifically, the connection member 30 and the cushion member 40, which are injection-molded at a high temperature, are thermally expanded and bulky, separated or separated, or in an incomplete state in which defects such as shape deformation may occur at an appropriate time or temperature. cool down with

At this time, the cooling damper 1 has an upper end 31, a connection part 33 adjacent to the upper end 31, and an expansion part 32 contracted around the plate 10, and the lower end 35 is connected to the lower end 35. It contracts around a part of the adjacent connection portion 33 and the bump 23. Due to the inclined surface 22 that narrows toward the bump 23, the volume decreases as much as possible while the density increases, so that the three sides of the bump 23 As a result, the shrinkage surface adheres strongly and is more firmly fixed.

The damper (1) of the present invention does not require a prior process such as a shot, pretreatment, adhesive application, etc. to place and adhere rubber between a plate and a mass in a conventional damper, and a post process such as removal of burrs after cooling. The production process is simplified and productivity is improved.

In addition, the connecting member 30 and the mass member 20 are firmly coupled in the plate 10 that is directly connected to the steering wheel and fixed so that the cushion member 40 is not separated even when the vehicle is greatly shaken, and the cushion member 40 is attached to the mass member 20 It has the advantage of limiting the behavior of the surrounding parts to prevent them from colliding with each other, causing noise and vibration, and causing damage.

1: damper
10: plate
11: body part
12: main through hole
13: additional through hole
14: central through hole
15: auxiliary through hole
16: assembly part
17: assembly hole
20: mass member
21: fixed hole
22: slope
23: bump
24: center pin
30: connecting member
31: upper part
32: extension
33: connection part
34: lower part
35: contraction surface
40: cushion member
41: inner space
50: upper mold
51: upper molding part
60: heavy mold
61: Intermediate forming part
62: separation part
70: lower mold
71: seating part

Claims (4)

The lower mold 70 on which the mass member 20 is seated and the plate 10 are seated and the middle mold 60 spaced apart from the mass member 20 by a predetermined distance, the connection member 30 and the cushion member 40 In the vehicle steering wheel damper manufactured by consisting of an upper mold 50 that is completely in close contact with the injection molding,
The mass member 20 is seated on the seating portion 71 inside the lower mold 70,
Above the lower mold 70 on which the mass member 20 is seated, the middle molding part 61 and the plate ( While 10) is seated, the heavy mold 60 and the plate 10 having a spacer 62 spaced apart from the mass member 20 by a predetermined distance are raised,
Above the middle mold 60 on which the plate 10 is seated, the upper mold 50 having the upper molding part 51 for molding the connection member 30 and the cushion member 40 is in close contact and rubber is injected and molded. Manufactures a damper (1) coupled with a connecting member (30) and a cushion member (40),
The upper end 31 and the expansion part 32 are formed on the plate 10 while covering a part of the outer surface and connected through the main through hole 12, and the connection member is formed in the fixing hole 21 of the mass member 20. The lower end 35 of (30) is molded along the inner shape of the fixing hole 21,
When the connecting member 30 cools the injection-molded damper 1, the upper end 31 and the expansion part 32 contract around the plate 10, and the lower end 35 contracts around the bump 23, A method of manufacturing a direct injection integrated steering wheel damper, characterized in that the volume is reduced and the density is increased due to the inclined surface (22) and is firmly bound. According to claim 1,
The upper end 31 of the connecting member 30 is fixed to the body 11 of the plate 10, and the central axis is such that the contact area of the connecting member 30 with the plate 10 is expanded so that it can be firmly fixed. A secondary through hole 15 is formed surrounding the main through hole 12, and the upper end 31 extends from the plate 10 to a wider range to absorb vibration and improve fixation and bonding strength. A direct injection integrated steering wheel damper manufacturing method, characterized in that by additionally forming a through hole (13). According to claim 1,
A portion of the outer surface is wrapped around the central through hole 14 of the plate 10 and connected to the auxiliary through hole 15, and the cushion member is positioned so that the central pin 24 of the mass member 20 is located in the inner space 41. (40) is molded,
A direct injection-integrated steering wheel damper manufacturing method, characterized in that when the mass member 20 is greatly shaken, the center pin 24 first collides with the cushion member 40, limiting it from moving any further. A plate 10 installed directly on a steering wheel, which is a steering device of a vehicle, and a mass member 20 having a predetermined weight to dampen vibration, and combining the plate 10 and the mass member 20 at a predetermined distance. It is composed of a connecting member 30 and a cushion member 40 coupled to the plate 10 to limit the behavior of the mass member 20 and damping vibration transmitted from driving of the vehicle In a steering wheel damper for a vehicle ,
The plate 10 has an upper end 31 and an expansion part 32 that cover a part of the outer surface and are connected through the main through hole 12, and the connection member is formed in the fixing hole 21 of the mass member 20. The lower end 35 of (30) is formed along the inner shape of the fixing hole 21,
As the damper 1 in which the connecting member 30 is injection-molded is cooled, the upper end 31 and the expansion part 32 contract around the plate 10 and the lower end 35 contracts around the bump 23. Direct injection integral steering wheel damper, characterized in that the volume is reduced and the density is increased due to the inclined surface (22) and firmly bound.

Images