Source: https://patents.google.com/patent/WO2004022372A1/en
Timestamp: 2020-04-09 05:04:21
Document Index: 574171210

Matched Legal Cases: ['art 76', 'art 76', 'art 76', 'art 76', 'art 76', 'art\n76', 'arts 74', 'arts 74', 'art 76']

WO2004022372A1 - Engine mount stucture for vehicle - Google Patents
WO2004022372A1
WO2004022372A1 PCT/JP2003/010755 JP0310755W WO2004022372A1 WO 2004022372 A1 WO2004022372 A1 WO 2004022372A1 JP 0310755 W JP0310755 W JP 0310755W WO 2004022372 A1 WO2004022372 A1 WO 2004022372A1
PCT/JP2003/010755
2003-08-26 Application filed by Honda Giken Kogyo Kabushiki Kaisha filed Critical Honda Giken Kogyo Kabushiki Kaisha
2004-03-18 Publication of WO2004022372A1 publication Critical patent/WO2004022372A1/en
An engine mount (34) mounts a motive power (13) to a vehicle body. The engine mount includes an inner cylindrical member (55) attached to the motive power, and a resinous bracket (54) attached to the vehicle body. The inner cylindrical member is elastically connected to the bracket. The bracket includes a cold shut portion (77) and a weak portion (63) provided at the cold shut portion. The cold shut portion is formed when the bracket is molded from molten resin. The weak portion has such a small strength that, when the vehicle body collides with some object, the bracket is fractured to absorb the collision.
ENGINE MOUNT STRUCTURE FOR VEHICLE
Background Art Known engine mounts are structured to have resinous members mounted to bodies of vehicles. One example of such engine mounts is disclosed in Japanese Patent Laid-Open Publication No. HEI 6-173988.
However, the anti-vibration member disclosed in the publication is not arranged to break or operate in a stroke necessary to displace the engine by the greater distance. Moreover, the anti- vibration member does not have its fracture strength set allowing for the displacement of the engine during the collision of the vehicle.
A certain preferred embodiment of the present invention will herein- after be described in detail, by way of example only, with reference to the accompanying drawings, in which:
Fig. 4A through Fig. 4D illustrate how the engine mount is molded out of molten resin flowing within a cavity of a mold in accordance with the present invention; Fig. 5A shows the engine mount undergoing a force produced when the vehicle is in normal operation and Fig. 5B shows the engine mount undergoing a force produced by collision of the vehicle; and
Fig. 6 illustrates partly in cross-section a conventional engine mount. Best Mode for Carrying Out the Invention
Referring to Fig. 1, there are shown vehicular components disposed within an engine compartment of a vehicle. It is to be noted that an arrow labeled "front" points in a forward direction of the vehicle. The vehicular components include an engine 10, a transmission 11 connected to one side of the engine 10, a subframe 12 and right and left front side frames (only left one shown and designated at 15). The subframe 12 and the front side frames support the engine 10 and the transmission 11. The engine 10 and the transmission 11 cooperate with each other to constitute a motive power source 13.
Such a transmission upper mount 34 is an engine mount of the present invention. The transmission upper mount 34 is attached to the transmission 11 through a mount bracket 39. The transmission upper mount 34 is attached directly to the left front side frame 15 provided on a vehicle body of the vehicle. The term "engine mount" as used herein means a member for elastically holding or mounting the motive power source 13 to the vehicle body.
The resinous bracket 54 includes a tubular or cylindrical portion 57. The cylindrical portion 57 has its inner peripheral surface 57a defining an opening or space 58 of cylindrical configuration. The cylindrical portion 57 surrounds the inner cylindrical member 55. The inner cylindrical member 55 has its outer peripheral surface 55a spaced from the inner peripheral surface 57a by a predetermined interval or distance d. In other words, the inner cylindrical member 55 is loosely received in the cylindrical portion 57. With this arrangement, the inner cylindrical member 55 is movable radially and axially thereof relative to the cylindrical portion 57. More specifically, the inner cylindrical member 55 and the elastic member 56 are positioned in the space 58. The bracket 54 has a cold shut portion 61 formed when the bracket 54 is molded out of molten resin, as will be described later. The bracket 54 includes a weak or fragile portion 63 having a hole 62 formed to extend vertically through the cold shut portion 61. The hole 62 extends horizontally in the form of an arc. More specifically, as viewed in top plan, the hole 62 takes the form of an arc extending transversely of and substantially perpendicularly to the cold shut portion 61. The cold shut portion 61 is positioned or formed in parallel to a direction of exertion of force on the transmission upper mount 34 during collision of the vehicle with some object, as will be discussed later in relation to Fig. 5A and Fig. 5B. As will be described later with reference to Fig. 4A through Fig. 4D, during molding of the bracket 54, two flows or parts of melted resin come together to produce such a cold shut portion 61. The elastic member 56 is mounted within the space 58 in contact with the inner peripheral surface 57a of the cylindrical portion 57. The cold shut portion 61 is formed in texture of the resinous bracket 54. The cold shut portion 61 of the bracket 54 has its opposite sides 54a, 54b having smaller strength than the rest of the resinous bracket 54. In accordance with the present invention, the cold shut portion 61 is positively or advantageously used to facilitate breaking the bracket 54 when the vehicle body collides with some object. No one has found that such a cold shut portion 61 of small strength is formed for the purpose of breaking the bracket 54 during the collision of the vehicle. The hole 62 is provided as follows.
The hole 62 may have its various sizes or contours to provide further small strength of the cold shut portion 61. Namely, the further small strength of the cold shut portion 61 is achieved by providing the hole 62. For example, the hole 62 is made large in size to thereby reduce the size or cross-sectional area of the cold shut portion 61. This reduction provides decreased fracture strength of the bracket 54.
As shown in Fig. 4A, molten resin 74 is injected through an injection port 73 into a cavity 72 of the mold 71, as indicated by arrow A. The mold 71 has a columnar part 76 disposed within the cavity 72. The cavity 72 has first and second passageways 75a, 75b each formed between an inner surface 71a of the mold 71 and an outer surface 76a of the columnar part 76. The cavity 72 also has a joining space S cooperating with the first and second passageways 75a, 75b to surround the columnar part 76. Each of the first and second passageways 75a, 75b communicates with the injection port 73 and the joining space S.
After passing through the injection port 73, the molten resin 74 hits a corner 76b of the columnar part 76 to divide into two flows or parts of the molten resin 74. One part of the molten resin 74 is referred to as "first resin 74a". The other is referred to as "second resin 74b". The first resin
74a has its leading end surface 74a' while the second resin 74b has its leading end surface 74b'.
As shown in Fig. 4B, the first and second resins 74a, 74b flow through the first and second passageways 75a, 75b, respectively. At this time, one half of the cavity 72 is occupied by the molten resin 74.
As shown in Fig. 4C, the first and second resins 74a, 74b flow into the joining space S. Then, the respective leading end surfaces 74a', 74b' of the first and second resins 74a, 74b partly come together or contact each other.
As shown in Fig. 4D, the cavity 72 is completely filled with the molten resin 74. The leading end surfaces 74a', 74b' come together, or have their entire areas meeting each other to provide the cold shut portion
61 therebetween. With the leading end surfaces thus held in contact with each other, the molten resin 74 is hardened to thereby provide the cold shut 61 as indicated by a phantom line.
With respect to Fig. 5A, for example, when the vehicle accelerates, the transmission upper mount 34 is subjected to a force FI through the motive power source 13, as shown by an open arrow. In other words, the force FI acts on the transmission upper mount 34 in a direction from a front part of the vehicle body to a rear part of the vehicle body.
Upon undergoing the force FI, the elastic member 56 is deformed to displace the inner cylindrical member 55 rearwardly of the vehicle body.
This makes it possible to withstand or absorb the force FL With respect to Fig. 5B, for example, when the vehicle collides with some object, the transmission upper mount 34 is subjected to a force F2 through the motive power source 13, as shown by an open arrow. In other words, the force F2 acts on the transmission upper mount 34 in the direction from the front part of the vehicle body to the rear part of the vehicle body.
Upon exertion of the force F2 on the transmission upper mount 34, the cold shut portion 61 and the weak portion 63 of the resinous bracket
54 are fractured to thereby displace the motive power source 13 rearwardly of the vehicle body, absorbing the collision energy or the collision of the vehicle with the object.
As described with reference to Fig. 1, Fig. 2 and Fig. 4D, the engine 10 and the transmission 11 cooperate with each other to define the motive power source 13. The motive power source 13 is supported by the right and left front side frames and the subframe 12. The left one of the front side frames support the motive power source 13 through the transmission upper mount 34. The transmission upper mount 34 includes the inner cylindrical member 55 mounted to one of the motive power source 13 and the front side frame 15, the resinous bracket 54 mounted to the other, and the elastic member 56 connecting the inner cylindrical member 55 to the resinous bracket 54. The bracket 54 has the cylindrical portion 57 defining the space 58 of cylindrical configuration. The cylindrical portion 57 surrounds the inner cylindrical member 55 with the given interval d provided therebetween. The bracket 54 has the cold shut portion 61 formed when the bracket 54 is molded out of molten resin 74 through the use of the mold 71. The bracket 54 has the weak or fragile portion 63 having the arc-shaped hole 62 formed to extend vertically through the cold shut portion 61. The mold 71 has the cavity 72 formed therein. The mold 1 has the columnar part 76 positioned within the cavity 72 and arranged to provide the cylindrical portion 57 during the molding of the bracket 54.
More specifically, during the molding of the bracket 54, the columnar part
76 serves to divide the molten resin 74 into the two parts 74a, 74b. The parts 74a, 74b flow within the cavity 72 in such a manner as to surround the columnar part 76 and join together to provide the cold shut portion 61 therebetween.
During head-on or offset collision of the vehicle with another vehicle and the like, the transmission upper mount 34 is subjected to a force (collision force) through the motive power source 13. The resinous bracket
54 is then broken to absorb the collision.
Thus, the transmission upper mount 34 is designed to perform a proper operation in response to both the normal operation and collision of the vehicle. The hole 62 need not extend vertically through the cold shut portion 61 as explained above. Instead of the hole 62, any cutout, slit, recess or groove may be formed on the cold shut portion 61 without extending vertically through the latter. Industrial Applicability
1. An engine mount for mounting to a vehicle body a motive power source including an engine and a transmission, comprising: an inner cylindrical member to be mounted to one of said motive power source and said vehicle body; an outer mounting member to be mounted to the other of said motive power source and said vehicle body, said outer mounting member being elastically connected to said inner cylindrical member; and said outer mounting member having a cylindrical portion loosely receiving said inner cylindrical member therein such that said inner cylindrical member is movable in both axial and radial directions thereof relative to said cylindrical portion, said outer mounting member having a weak portion for fracturing said outer mounting member to displace said motive power source rearwardly of said vehicle body during collision of said vehicle body, said weak portion being provided at a cold shut portion, formed when said outer mounting member is molded from molten resin, of said outer mounting member.
3. An engine mount for mounting to a vehicle body a motive power source including an engine and a transmission, comprising: an inner cylindrical member to be mounted to one of said motive power source and said vehicle body; a resinous outer mounting member to be mounted to the other of said motive power source and said vehicle body; an elastic member connecting said inner cylindrical member to said outer mounting member; said outer mounting member having a cylindrical portion surrounding said inner cylindrical member with a predetermined interval provided therebetween; and said outer mounting member having a cold shut portion and a weak portion provided at said cold shut portion, said cold shut portion being formed when said outer mounting member is molded from molten resin through the use of a mold having a cavity formed therein and a columnar part disposed within said cavity to provide said cylindrical portion during the molding of said outer mounting member, said columnar part being capable of dividing said molten resin into two parts during the molding of said outer mounting member, such that the two parts of said molten resin flow within said cavity to surround said columnar part and join together to provide said cold shut portion.
PCT/JP2003/010755 2002-09-06 2003-08-26 Engine mount stucture for vehicle WO2004022372A1 (en)
EP20030794096 EP1420970B1 (en) 2002-09-06 2003-08-26 Engine mount stucture for vehicle
DE2003602031 DE60302031T2 (en) 2002-09-06 2003-08-26 Arrangement for vehicle engine mount
US10/501,114 US6962229B2 (en) 2002-09-06 2003-08-26 Engine mount structure for vehicle
WO2004022372A1 true WO2004022372A1 (en) 2004-03-18
EP1260427A2 (en) * 2001-05-23 2002-11-27 Nissan Motor Company, Limited Bracket for motor vehicle
PATENT ABSTRACTS OF JAPAN vol. 018, no. 512 (M - 1679) 27 September 1994 (1994-09-27) *
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