Dog-bone type rear roll rod

Abstract

Disclosed is a dog-bone type rear roll rod in which a body bracket, which is fixed to a vehicle body, and front and rear rubbers, which are disposed at front and rear sides of the body bracket, respectively, are connected together through an inner pipe and fastened to a rod by means of a fastening member, the dog-bone type rear roll rod including: an extrusion plate which has a through hole formed such that the inner pipe penetrates a center of the extrusion plate, has a width length greater than a width length of the rod, and is press-fitted between the rod and the front rubber.

Claims

1. A dog-bone type rear roll rod in which a body bracket, which is fixed to a vehicle body, and front and rear rubbers, which are disposed at front and rear sides of the body bracket, respectively, are connected together through an inner pipe and fastened to a rod by means of a fastening member, the dog-bone type rear roll rod comprising: an extrusion plate which has a through hole formed such that the inner pipe penetrates a center of the extrusion plate, has a width length greater than a width length of the rod, and is press-fitted between the rod and the front rubber; wherein a position of the extrusion plate is fixed as the extrusion plate slides in a state in which both end portions at one side of the extrusion plate, which face the rod, are formed to be bent in a shape and fitted with the rod, and a pair of fitting holes is formed along an outer circumferential surface of the rod so that both of the end portions of the extrusion plate are inserted into the pair of fitting holes and slide.

2. The dog-bone type rear roll rod of claim 1, further comprising a pair of extrusion plates having the same shape provided between the rod and the front rubber and at a position facing the rear rubber.

3. The dog-bone type rear roll rod of claim 1, wherein the extrusion plate includes: a first plate which is disposed between the rod and the front rubber; and a second plate which is disposed to face the rear rubber and has a thickness different from a thickness of the first plate.

4. The dog-bone type rear roll rod of claim 1, wherein the extrusion plate is comprised of aluminum.

5. A vehicle comprising: a vehicle body; a body bracket fixed to the vehicle body; a front rubber disposed at a front side of the body bracket; a rear rubber disposed at a rear side of the body bracket; an inner pipe connecting together the body bracket and the front and rear rubbers; a rod, the body bracket and the front and rear rubbers being fastened to the rod by a fastening member; and a dog-bone type rear roll rod comprising an extrusion plate which has a through hole formed such that the inner pipe penetrates a center of the extrusion plate, has a width length greater than a width length of the rod, and is press-fitted between the rod and the front rubber; wherein a position of the extrusion plate is fixed as the extrusion plate slides in a state in which both end portions at one side of the extrusion plate, which face the rod, are formed to be bent in a shape and fitted with the rod, and a pair of fitting holes is formed along an outer circumferential surface of the rod so that both of the end portions of the extrusion plate are inserted into the pair of fitting holes and slide.

6. The vehicle of claim 5, further comprising a pair of extrusion plates having the same shape provided between the rod and the front rubber and at a position facing the rear rubber.

7. The vehicle claim 5, wherein the extrusion plate includes: a first plate which is disposed between the rod and the front rubber; and a second plate which is disposed to face the rear rubber and has a thickness different from a thickness of the first plate.

8. The vehicle of claim 5, wherein the extrusion plate is comprised of aluminum.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The above and other features of the present invention will now be described in detail with reference to certain exemplary embodiments thereof illustrated in the accompanying drawings which are given hereinbelow by way of illustration only, and thus are not limitative of the present invention, and wherein:

(2) FIG. 1 is an exploded perspective view illustrating a dog-bone type rear roll rod in the related art;

(3) FIG. 2 is an exploded perspective view illustrating a dog-bone type rear roll rod according to an exemplary embodiment of the present invention;

(4) FIG. 3 is a view illustrating a state in which the dog-bone type rear roll rod according to the exemplary embodiment of the present invention is coupled;

(5) FIG. 4 is a view illustrating a state in which an extrusion plate is coupled to the dog-bone type rear roll rod according to the exemplary embodiment of the present invention; and

(6) FIG. 5 is a view illustrating extrusion plates coupled to a dog-bone type rear roll rod according to another exemplary embodiment of the present invention.

(7) The following reference numerals can be used in conjunction with the drawings: 1: rod 1a: fitting hole 10: body bracket 12: front rubber 14: rear rubber 16: inner pipe 18: fastening member 20: insulator 100: extrusion plate 100a: through hole 110: first plate 120: second plate

(8) It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various preferred features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.

(9) In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

(10) Hereinafter reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

(11) Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

(12) Advantages and features of the present invention and methods of achieving the advantages and features will be clear with reference to the exemplary embodiments described in detail below together with the accompanying drawings.

(13) However, the present invention is not limited to the exemplary embodiments set forth below, and may be embodied in various other forms. The present exemplary embodiments are for rendering the disclosure of the present invention complete and are set forth to provide a complete understanding of the scope of the invention to a person with ordinary skill in the technical field to which the present invention pertains, and the present invention will only be defined by the scope of the claims.

(14) In the description of the present invention, a detailed explanation of publicly known related technologies may be omitted so as to avoid unnecessarily obscuring the subject matter of the present invention.

(15) FIG. 1 is an exploded perspective view illustrating a dog-bone type rear roll rod in the related art, and FIG. 2 is an exploded perspective view illustrating a dog-bone type rear roll rod according to an exemplary embodiment of the present invention.

(16) FIG. 3 is a view illustrating a state in which the dog-bone type rear roll rod according to the exemplary embodiment of the present invention is coupled, and FIG. 4 is a view illustrating a state in which an extrusion plate is coupled to the dog-bone type rear roll rod according to the exemplary embodiment of the present invention.

(17) As illustrated in FIG. 1, the dog-bone type rear roll rod includes a body bracket 10 which is fixed to a vehicle body, and a front rubber 12 and a rear rubber 14 which are disposed at front and rear sides of the body bracket 10, respectively, and serve to attenuate vibration and noise transmitted through a rod 1 and to control displacement of a powertrain when the large displacement of the powertrain occurs.

(18) The dog-bone type rear roll rod is connected to the powertrain of the vehicle and functions as a damper, and the dog-bone type rear roll rod has an insulator 20 which is inserted and installed into a connecting portion provided at an end portion of the rod 1.

(19) The dog-bone type rear roll rod further includes an inner pipe 16, and in a state in which the fastening member 18 is coupled by sequentially penetrating the inner pipe 16, the rear rubber 14, the body bracket 10, and the front rubber 12, the fastening member 18 is fastened to a coupling member 17, such that the fastening member 18 is fixedly fastened to the rod 1 by the coupling member 17.

(20) However, the rod 1 of the dog-bone type rear roll rod in the related art is made of steel or aluminum and needs to be formed to have a predetermined length when the rod 1 is manufactured, and as a result, it is necessary to reduce costs and weights.

(21) That is, the rod 1 generally needs to have a predetermined length so as to be mounted at a point of a sub frame which is close to a center of gravity of the powertrain, and there is a drawback in that the rod 1 is frequently damaged due to external factors because the rod 1 is positioned at a lowest end of the vehicle. In addition, at the time of a sudden unintended acceleration evaluation, an engine mount and a transmission mount support loads at an upper end, but at a lower end, the rear roll rod supports the resultant loads of the two mounts, and as a result, a significantly high load is applied to the rod 1.

(22) Therefore, the rod 1 is an important portion in respect to reducing weights and costs and ensuring strength and rigidity, and as a result, a large amount of time is required to manufacture the rod 1, and a squeeze process method is generally used to ensure strength and rigidity.

(23) However, when manufacturing the rod 1 by using the squeeze process method, two rods 1 generally need to be manufactured by a set of molds because of a large size of the rod 1. Therefore, the squeeze process method is very disadvantageous in terms of costs, and as a result, there is a great loss of materials because of scraps, which causes an increase in costs.

(24) To this end, in the present exemplary embodiment, the rod 1 is manufactured by an aluminum extrusion process method. As illustrated in FIG. 2, the present exemplary embodiment includes extrusion plates 100 in order to prevent the front rubber 12 from being damaged by a load transmitted in a longitudinal direction of the rod 1 when manufacturing the rod 1, and to effectively disperse the applied load and transmit the load to the front rubber 12.

(25) In other words, when manufacturing the rod 1 by using the aluminum extrusion process method, both sides of the rod 1 in the longitudinal direction and an end portion of the rod 1, which faces the front rubber 12, are horizontally cut during the extrusion process in order to minimize costs. In this case, the end portion facing the front rubber 12 is sharpened, such that the front rubber 12 may be damaged by the transmitted load. Further, as illustrated in FIG. 3, a cross-sectional area made by the cutting is smaller than the front rubber 12, and as a result, the load may not be easily transmitted in the arrow direction.

(26) Therefore, in the present exemplary embodiment, a through hole bow is formed such that the inner pipe 16, which is provided separately from the rod 1, penetrates the center of the extrusion plate 100, and as illustrated in FIG. 3, the extrusion plate 100 has a width greater than a width length of the rod 1 and is press-fitted between the rod 1 and the front rubber 12, and as a result, it is possible to solve the aforementioned problem.

(27) That is, as illustrated in FIG. 4, a position of the extrusion plate 100 may be fixed as the extrusion plate 100 slides in a state in which both end portions at one side of the extrusion plate 100, which face the rod 1, are formed to be bent in a shape and fitted with the rod 1 at one side.

(28) Here, the extrusion plate 100 may be formed in a shape and then coupled to the rod 1 in a rail manner as described above, but the extrusion plate 100 may be formed in other shapes so that the extrusion plate 100 may be primarily fixed in a case in which the extrusion plate 100 is coupled to the rod 1.

(29) To this end, a pair of fitting holes 1a is formed along an outer circumferential surface of the rod 1 so that both of the bent end portions of the extrusion plate 100 are inserted into the pair of fitting holes 1a and slide so that the through hole bow is inserted into a fastening hole (not illustrated) which is formed at a center of the rod 1 and to which the fastening member 18 is fastened.

(30) The extrusion plate 100 may be manufactured by the extrusion process method in order to reduce manufacturing time, costs, and weights.

(31) In addition, according to the dog-bone type rear roll rod according to the present exemplary embodiment, the extrusion plate 100, as well as the rod 1 and the body bracket 10, may also be manufactured by the extrusion process method, and as a result, the dog-bone type rear roll rod is more advantageous than the related art in respect to reducing costs and weights.

(32) Meanwhile, a pair of extrusion plates 100 having the same shape is provided between the rod 1 and the front rubber 12 and at the position facing one end portion of the rear rubber 14, as described above.

(33) Therefore, when manufacturing the extrusion plate 100 by using the extrusion process method, a plurality of extrusion plates 100 having the same shape may be manufactured, and may be applied in common between the rod 1 and the front rubber 12 and at the position facing one end portion of the rear rubber 14, thereby effectively reducing costs.

(34) FIG. 5 is a view illustrating extrusion plates coupled to a dog-bone type rear roll rod according to another exemplary embodiment of the present invention.

(35) As illustrated in FIG. 5, the dog-bone type rear roll rod according to the present exemplary embodiment includes the extrusion plates 100, and the extrusion plate 100 includes a first plate no and a second plate 120.

(36) First, the first plate no is disposed between the rod 1 and the front rubber 12, and both end portions at one side of the first plate no, which face the rod 1, are formed to be bent in a shape, and are coupled to the rod 1 by sliding in a state of being inserted into the fitting holes is provided in the rod 1.

(37) The second plate 120 is disposed to face the rear rubber 14, and has a thickness different from a thickness of the first plate 110.

(38) The second plate 120 not only has a thickness different from that of the first plate 110, but also has an area different from that of the first plate 110, and the second plate 120 different from the first plate 110 may be applied in accordance with torque of an engine mounted in a vehicle.

(39) That is, because the load transmitted through the rod 1 is higher in an engine using high torque than in an engine using low torque, it is possible to effectively cope with the case in which the first and second plates 110 and 120 are applied to the engines using different torque, by applying the first and second plates 110 and 120 having different thicknesses and areas.

(40) Here, all of the first and second plates 110 and 120 may be manufactured by the aluminum extrusion process method, and the reason is to optimize costs and weights.

(41) According to the present invention, since the rod is manufactured by the extrusion method, it is possible to reduce costs and weights. Further, since the extrusion plate is fitted with the rod in a sliding manner in order to increase a cross-sectional area of the end portion of the rod which is positioned to face the front rubber, it is possible to uniformly disperse the load transmitted through the rod to the front rubber.

(42) According to the present invention, since all of the extrusion plates, which are coupled to face the rod and the front rubber and face the rear rubber, are manufactured by the extrusion method, it is possible to reduce time required to manufacture the roll rod.

(43) The invention has been described in detail with reference to preferred embodiments thereof. However, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.