KR20130065329A

KR20130065329A - Structure of roll-rod

Info

Publication number: KR20130065329A
Application number: KR1020110132143A
Authority: KR
Inventors: 정공섭; 윤형진
Original assignee: 현대자동차주식회사; 기아자동차주식회사
Priority date: 2011-12-09
Filing date: 2011-12-09
Publication date: 2013-06-19

Abstract

PURPOSE: A structure of a roll-rod is provided to improve productivity by simplifying a structure and reduce the size of the structure without the degradation of the performance of the vibration insulation. CONSTITUTION: A structure of a roll-rod comprises a fastening rod(10), a housing(20), a core, an insulator, and a fixing bolt. The front side of the fastening rod is equipped with a mounting hole for a bush(12) which is connected to the lower side of a power train. The housing is joined to the rear side of the fastening rod. The core is accepted inside the housing and is integrally molded with an insulator. The insulator is made of an elastic material or synthetic resin material with a predetermined elasticity. The insulator is joined to the outer surface of the core in order to separate the core on the inner circumference of the housing. The fixing bolt penetrates the core inside the housing. The fixing bolt joins the fastening rod and core to interlock the movement thereof. [Reference numerals] (AA) Up and down direction; (BB) Back and forth direction; (CC) Right and left direction

Description

Structure of Roll-rods

The present invention relates to a structure of a roll rod mounted in front of a subframe of a vehicle to support the behavior of a power train. More specifically, the front insulator and the rear insulator are provided so that the insulator can be operated in a compact space. It relates to a structure of a roll rod configured integrally and behaves inside the housing.

Passenger vehicles are mostly lightweight and highly productive monocoque bodies instead of frame bodies. The monocoque body is a structure in which a separate frame is removed, and a power train including an engine is directly mounted on the body. Therefore, the monocoque body functions as a frame itself, and the suspension and chassis components are mounted, respectively, but the vibration of the power train (integrated with the engine, the transmission and the differential gear) is prevented from being transmitted directly to the vehicle body. Subframes are mounted on the lower part of the vehicle to disperse the impact when the vehicle crashes.

As shown in FIG. 1, the subframe has a plate shape having an “H” shape (or “I” shape), and is fixed to the vehicle body and mounted with a steering gearbox. In addition, the motor module is additionally mounted to assist the movement of the rack gear mounted in the gearbox in the case of a vehicle having a rack type-motor driven power steering (R-MDPS) type power steering device.

On the other hand, a vehicle equipped with a subframe is generally supported by mounting members at three places (three point mount method) or four places (four point mount method).

That is, the engine mount and the transmission mount are mounted on both sides of the vehicle body to support the load of the power train, but the roll rod is mounted at the front of the subframe so as to share displacement control and vibration damping of the power train.

The roll rod is mounted in a state in which the rear end is inserted into the server frame, and includes a fastening rod, an extension bolt, a front insulator, a rear insulator, a bracket, an end plate, and the like, as shown. The fastening rod has a bar shape having a predetermined length, and a front bushing connected to the transmission bottom is mounted at the front end protruding from the subframe, and the rear end inserted into the subframe is along the longitudinal direction. It is formed into an open pipe shape.

The rear side of the fastening rod is fitted with a bracket for fixing the fastening rod to the subframe. The bracket has a cylindrical shape but a partition is formed in the center thereof. The front insulator is mounted on the front side and the rear insulator is mounted on the rear side of the partition wall. And, the extension bolt is coupled to the end plate and entered from the rear of the rear insulator is fixed to the fastening rod.

The roll rod configured in this way has a function of damping by the rear insulator (between the bracket of the bracket and the end plate) in accordance with the displacement of the power train due to the inertia when the vehicle moves forward. It is compressed (between the bulkhead of the bracket and the protruding part of the fastening rod) to damp it.

However, as described above, as the R-MDPS method in which the motor module is mounted on the gearbox is applied to a vehicle, the mounting space of the roll rod in the subframe is limited, and there is a concern that interference may occur when the roll rod is elastically behaved.

That is, the conventional roll rod structure is a structure in which the front insulator or the rear insulator is elastically compressed according to the behavior of the power train, and a space larger than that of the elastic compression is required. However, this space is reduced as the number of parts mounted on the subframe increases, which is a limiting factor in design freedom.

Accordingly, the present invention has a main purpose to provide a roll rod structure that can be further reduced in size without deterioration of vibration insulation performance and is simple in construction and easy in productivity.

The present invention for achieving the above object, the front end is connected to the power train and the rear end is in the structure of the roll rod is mounted on the subframe, the fastening rod is mounted to the bush is connected to the power train at the front end; And a housing having a box shape having a space formed therein and fixed to the subframe and mounted to the rear of the fastening rod; and a core accommodated in the housing; and made of an elastic material, wherein the core is formed at an inner circumferential surface of the housing. An insulator coupled to the outer surface of the core to be spaced apart; And a fixing bolt penetrating the core in the housing to fasten the core to behave according to the movement of the fastening rod.

The insulator is integrally molded with the core, and is molded to protrude in a radial direction (both front and rear, up and down, and left and right directions) of the core.

The core is formed with a bent portion so that the insulator has a thicker thickness, the core has a concave shape. And, the rear side of the core is formed with a recess so that the head of the fixing bolt is inserted, to prevent the head of the fixing bolt does not interfere with the behavior of the core.

In addition, stoppers are provided at the front and rear of the housing to suppress excessive behavior of the core.

According to the present invention, the insulator divided into the front insulator and the rear insulator is formed by integrally molding the core so that the size of the insulator can be further reduced and the interference with the peripheral parts can be prevented during the operation of the roll rod. .

The core has a curved portion formed with a concave edge portion, thereby increasing the thickness of the insulator in a specific direction of the insulator, thereby controlling the behavior characteristics.

In addition, a recess is formed to prevent the head of the fixing bolt from colliding with the housing, and a stopper is installed to prevent excessive elastic deformation of the insulator, thereby improving durability.

1 is a view showing a cross-sectional view of the state and the roll rod is mounted on the sub-frame,
2 is a perspective view of a roll rod according to a preferred embodiment of the present invention,
3 is an exploded perspective view and an enlarged view of a core of a roll rod according to a preferred embodiment of the present invention;
4 is a perspective view showing the inside of the housing,
5 is a cross-sectional view showing a state in which the roll rod of the present invention is mounted on a subframe.

Hereinafter, the structure of the roll rod according to a preferred embodiment of the present invention with reference to the drawings in more detail.

2 and 3, the fastening rod 10 of the present invention has a predetermined length, the mounting hole 13 is formed in the front so that the bush 12 connected to the lower portion of the power train is mounted, the housing The pipe part 11 is formed at the rear so that the fixing bolt 14 may be partially inserted into the 20. The pipe portion 11 is inserted into the housing 20 and coupled to the core 30 so that the interference of the elastic behavior of the insulator 40 does not occur as shown in FIG. 2. It is of sufficient length to be exposed.

The housing 20 is coupled to the rear of the fastening rod 10. The housing 20 is a box shape having a predetermined space formed therein, and is coupled to a cover portion 20a having a through hole 22 perforated therein and a rear side of the cover portion 20a to insert the pipe portion 11 therein. Consisting of a body 20b. The cover portion 20a and the body 20b are coupled to each other, and flanges 21a and 21b having bolt holes are formed at both sides thereof so as to be fixed to the subframe. In the body 20b, holes 23 are formed at the time of operation of the insulator (to allow air to enter and exit the heat).

The core 30, which is a metal material, and an insulator 40 having a predetermined elasticity as a rubber material or a synthetic resin material are integrally processed and mounted on the housing. The core 30 is fixed to the end of the pipe portion 11 through the fixing bolt 14 through the rear side, the recess 33 is formed in the rear so that the head of the fixing bolt 14 does not protrude, the insulator A plurality of bends 32 are formed so that the insulator 40 can be formed thicker in a particular portion when molded into the 40 and (when processing) integrally. In the embodiment of the present invention, the bent part 32 is formed at four corners, but may be formed in various shapes and sizes according to design requirements.

The insulator 40 is integrally formed so as to protrude from the surface of the core 30, and the radial direction (both front and rear, up and down, left and right directions) so that the core 30 and the inner surface of the housing 20 do not contact. Molded to protrude. In particular, since the fastening rod 10 mainly moves in the front-back direction, it is preferable that the insulator 40 protrudes so that the front-back direction is formed relatively thicker than other directions. In addition, the insulator 40 is formed to have a partially concave shape so as to be more easily elastically deformed. Insulator 40 according to a preferred embodiment of the present invention is formed to form an "X" shape when viewed in the front, rear, up, down, left and right directions (see FIGS. 3, 4, and 5).

The roll rod configured as described above is insulated according to the behavior of the fastening rod 10 because the fixing bolt 14 is inserted and coupled to the fastening rod 10 at the rear side of the core 30 integrally formed in the insulator 40. 40 is elastically deformed and restored in the housing 20.

Accordingly, the inner surface of the housing 20 and the core 30 are spaced apart by the insulator 40, and as shown in FIG. 5, the housing 20 to prevent damage due to excessive elastic deformation of the insulator 40. Inside) stoppers 50a and 50b may be additionally installed at both front and rear sides thereof. Therefore, the insulator 40 is elastically behaved within the range where the stoppers 50a and 50b and the core 30 are not in contact with each other, and the core 30 is brought into contact with any one of the stoppers 50a and 50b. The elastic deformation of the insulator 40 is stopped to prevent breakage.

In the case of the conventional roll rod, the end plate (arranged at the rear end of the roll rod) in the front and rear direction of the bracket according to the elastic deformation of the front insulator or the rear insulator behaves along the longitudinal direction, but with the roll of the present invention configured as described above Since the behavior of the core 30 occurs only inside the lifting housing 20, the overall size and the space required in the subframe can be reduced.

As described above, the embodiments disclosed in the present specification and drawings are only illustrative of specific examples in order to facilitate understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: fastening rod
20: Housing
30: Core
40: Insulator

Claims

In the structure of the roll rod in which the front end is connected to the powertrain and the rear end is mounted to the subframe,
A fastening rod mounted with a bush connected to the power train at the front end; and
A housing having a box shape having a space formed therein and fixed to the subframe and mounted to the rear of the fastening rod; and
A core housed in the housing; and
An insulator made of an elastic material and coupled to an outer surface of the core to space the core from an inner circumferential surface of the housing; And
And a fixing bolt penetrating the core in the housing to fasten the core to behave according to the movement of the fastening rod.

The roll rod structure of claim 1, wherein the insulator is integrally molded with the core and is formed to protrude in a radial direction of the core.

The method of claim 2, The core has a structure of a roll rod, characterized in that the bent portion is formed to have a concavely hollow shape.

3. The roll rod structure according to claim 2, wherein a recess is formed at the rear side of the core to insert the head of the fixing bolt.

The structure of a roll rod according to any one of claims 1 to 4, wherein a stopper for suppressing excessive behavior of the core is provided at the front and the rear of the housing.