Transmission mount for a vehicle

Abstract

A transmission mount for a vehicle, comprising a housing (100) configured to be inserted and mounted in a mounting hole (202) formed in a side member (200) of a vehicle body, an insulator (110) having a plurality of support blades (112) integrally formed on an outer surface thereof to be inserted and mounted in the housing (100), a metal core (120) inserted into the insulator (110), and an outer holder (130) inserted together with the insulator (110) into the housing (100) in a state of contacting a surface of each of the support blades (112) so as to be fixed to the housing (100).

Description

[0001] The invention relates to a transmission mount for a vehicle, and more particularly to a transmission mount adapted to be press-fitted to a vehicle body side member.

[0002] Generally, when a powertrain comprising an engine (e.g., an internal combustion engine) and a transmission is mounted in an engine compartment of a vehicle, the powertrain is mounted by means of fasteners in the manner of a three-point support to control vibration and roll or roll behavior.

[0003] The mounting members include an engine mount mounted between the driveline engine and a vehicle body to support the engine, a transmission mount mounted between the driveline transmission and the vehicle body to support the transmission, and a roll bar that controls the roll or pitch of the driveline, and the like.

[0004] The main components of the fasteners are a rubber isolator to isolate the actual vibrations. However, since a direct connection of the isolator between the powertrain and the vehicle body is difficult, the fastener has a bracket that is bolted to the vehicle body in conjunction with the isolator.

[0005] However, in the case where the bracket incorporated in the mounting member (especially the transmission mount) has a weak structure, vibrations may be amplified by superimposing gear noise (at high frequency) or the like generated by gears in the transmission with the natural frequency of the bracket, which may lead to a reduction in noise, vibration & harshness (NVH) performance.

[0006] Accordingly, to strengthen the support structure connected to the insulator (rubber), reinforcement can be achieved by adding separate structures via welding or the like. However, although reinforcement can provide benefits for NVH performance, it typically results in increased weight and cost.

[0007] With reference to the Fig. 1 to 3, a transmission mount 10 according to the related art includes a housing 12, a vibration damping isolator 14 inserted into the housing 12, and a plurality of bridge brackets 16 connected to an outer diameter portion of the housing 12 and bolted to a vehicle body 20.

[0008] As in the Fig. 2 and Fig. 3, the bridge bracket 16 is bolted to the vehicle body (for example, a side member), and the front portion of the insulator 14 exposed through the front portion of the housing 12 is connected to a transmission support bracket 18 to complete the assembly of the transmission mount.

[0009] However, in the transmission mount according to the related technology described above, the bridge bracket is manufactured by welding multiple metal parts of predetermined shapes to increase the strength of the bridge bracket and bolted to the vehicle body (e.g., by four-point bolting). Therefore, the transmission mount according to the related technology has the disadvantages of reduced machinability and higher costs caused by the complicated assembly structure.

[0010] JP 2001-221286 A describes a transmission mount for a vehicle, comprising a housing configured to be inserted and mounted in a mounting hole formed in a side member of a vehicle body, an insulator having a plurality of support blades integrally formed on an outer surface thereof to be inserted and mounted in the housing, a metal core inserted into the insulator, and an outer holder inserted into the housing together with the insulator.

[0011] Further transmission mounts are known from DE 101 60 840 C1, JP 2011 - 112 183 A and KR 10 2011 0 037 685 A.

[0012] The object of the invention is to provide a transmission mount for a vehicle with an improved structure capable of being press-fitted to a vehicle body longitudinal member only by means of an insulator and without a bridge bracket, so that a reduction in weight and costs can be achieved by omitting the bridge bracket and the mountability can be improved by eliminating a bolting process.

[0013] The object is achieved according to the invention by a transmission suspension for a vehicle according to the features of claim 1. Advantageous further developments are described in the subclaims.

[0014] According to one aspect of the invention, there is provided a transmission mount for a vehicle, comprising a housing configured to be inserted and mounted in a mounting hole formed in a side member of a vehicle body, an insulator having a plurality of support blades integrally formed on an outer surface thereof to be inserted and mounted in the housing, a metal core inserted into the insulator, and an outer holder inserted into the housing together with the insulator in a state of being in (close) contact with a surface of each of the support blades so as to be fixed to the housing.

[0015] The housing is provided with a pair of mounting holes at regular intervals along the circumferential direction, and fixing ribs (or fixing bolts) inserted into and fixed in the mounting holes are integrally formed on an outer surface of the outer holder.

[0016] According to a preferred embodiment, a clamp contact groove may further be formed in a region of the outer surface of the outer holder between the fixing ribs.

[0017] According to another preferred embodiment, rubber may be vulcanized or an adhesive (or bonding agent) may be applied (or coated) to a surface of each of the fastening ribs.

[0018] According to a further preferred embodiment, support bodies covered by the support sheets of the insulator may be integrally formed in an upper and a lower position on both sides of the metal core.

[0019] According to yet another preferred embodiment, buffer projections covered by the insulator may be further formed on both sides of the metal core for defining positions.

[0020] According to another exemplary embodiment, a screw hole that is screwed to a gear support bracket may be formed in a front portion of the metal core.

[0021] According to yet another exemplary embodiment, a rubber stopper in contact with the gear support bracket may be further attached to a front portion of the housing for vibration isolation.

[0022] The invention is explained in more detail below with reference to the drawing. The drawing shows: Fig. 1 a view of a transmission suspension according to the related art; Fig. 2 and Fig. 3 views of a transmission mount assembly structure according to the related art; Fig. 4 is an exploded perspective view of a transmission mount according to the invention; Fig. 5 is a perspective assembly view of the transmission mount according to the invention; Fig. 6 is a perspective view of a metal core of the transmission mount according to the invention; Fig. 7 is a perspective view of the metal core, an insulator and an outer bracket of the transmission mount according to the invention in an assembled state; Fig. 8 to 10 are views illustrating a process of assembling the transmission mount according to the invention; Fig. 11 is a section of the transmission mount according to the invention performing a vibration isolation operation; and Fig. 12 is a schematic view of the transmission suspension according to the invention in an assembled state.

[0023] It should be understood that the attached drawings are not necessarily to scale and present a somewhat simplified representation of various features illustrating the basic principles of the invention. The specific design features of the present invention, including, for example, specific dimensions, orientations, positions, and shapes disclosed herein, will be determined in part by the particular intended application and usage environment.

[0024] In the figures, reference numerals refer to the same or equivalent parts of the present invention throughout the individual figures of the drawing.

[0025] It is understood that the term "vehicle" or "vehicular" or other similar term, as used herein, encompasses general motor vehicles, such as passenger cars, including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft, including a variety of boats and ships, aircraft, and the like, as well as hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from feedstocks other than petroleum). As referred to herein, a hybrid vehicle is a vehicle that has two or more power sources, for example, both gasoline power and electric power.

[0026] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It is further understood that the terms "comprises" and / or "comprising," when used in this specification, describe the presence of the recited features, integers, steps, acts, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, acts, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed elements.Throughout the specification, unless explicitly stated otherwise, the word "comprise" and variations such as "comprises" or "comprising" are intended to imply the inclusion of the recited elements and not the exclusion of any other elements. Furthermore, the terms "unit," "unit," "units," "units," and "modules" used in the specification refer to units for performing at least one function and operation, and may be implemented by hardware components or software components, and combinations thereof.

[0027] Furthermore, the control logic according to the present invention may be embodied as a non-transitory computer-readable medium on a computer-readable medium containing executable program instructions executed by a processor, a controller, or the like. Examples of computer-readable media include, but are not limited to, ROM, RAM, CD-ROMs, magnetic tapes, floppy disks, memory sticks, smart cards, and optical data storage devices. The computer-readable storage medium may also be distributed in network-coupled computer systems, such that the computer-readable medium is stored and executed in a distributed manner, e.g., by a telematics server or a control area network (CAN).

[0028] 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 has been described in connection with exemplary embodiments, it is to be understood that the 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.

[0029] The Fig. 4 and Fig. 5 show a transmission suspension according to the invention, and reference numeral 100 denotes a metallic housing.

[0030] The housing 100 has a cylindrical shape in which a vertical elongated rectangular opening is opened through a front portion and a rear portion.

[0031] In addition, a pair of mounting holes 102 are formed in the housing 100 at regular intervals along the circumferential direction.

[0032] The housing 100 as described above is configured to be inserted and mounted in a mounting hole 202 formed in a side member 200 of a vehicle and fixed in advance by welding or the like.

[0033] An isolator 110, which has a metal core 120 embedded therein and is made of rubber, is inserted into the housing 100. The metal core 120 serves as a solid reinforcement and skeleton in the isolator 110, and the isolator 110 is responsible for performing the actual vibration isolation in the housing 100.

[0034] As in Fig. As shown in Figure 4, it is preferable that the metal core 120 be provided in a rectangular parallelepiped shape. Furthermore, support bodies 122, covered by support sheets 112, are integrally formed protrudingly at upper and lower positions on both sides of the metal core 120, as described herein.

[0035] Furthermore, buffer projections 124, which are covered by the insulator 110, are integrally formed on both sides of the metal core 120 for defining positions in positions in front of the support bodies 122.

[0036] In the front portion of the metal core 120, screw holes 126 are formed in which screws are fastened by screwing with a gear support bracket 150.

[0037] For example, when vulcanizing the insulator 110, vulcanization is performed with the metal core 120 inserted into a metal mold for vulcanization. Therefore, the insulator 110 is molded in a state where the peripheral surface of the metal core 120 is covered.

[0038] The insulator 110 has a rectangular body portion 114 and a plurality of support blades 112 integrally formed in an upper and a lower position on both sides of the rectangular body portion 114, as shown in Fig. 4, and the support blades 112 are arranged in an X-shape around the rectangular body portion 114.

[0039] As in the Fig. 4 and Fig. As shown in Figure 6, the upper support bodies 122 of the metal core 120 are formed to slope downward, and the lower support bodies 122 of the metal core 120 are formed to slope upward. As a result, the insulator 110 covering the metal core 120 is in a locked state in which it is fixed in place without rotating right and left.

[0040] In addition, a metallic outer holder 130 is in close contact with an outer surface of each of the support blades 112 of the insulator 110 such that it is inserted into and fixed to the housing 100 together with the insulator 110.

[0041] In particular, since the isolator 110 is molded from rubber and must be moved vertically and horizontally for vibration isolation, the isolator 110 is not directly attached to the housing 100. Instead, the outer holder 130, which is in close contact with the outer surface of each of the support blades 112 of the isolator 110, is inserted into each of the mounting holes 102 of the housing 100 and secured to the housing 100.

[0042] For this purpose, the outer holder 130 has a flat plate body 132 which is in close contact with the outer surface of each of the support leaves 112 of the insulator 110, and fixing ribs 134 which protrude from an outer surface of the flat plate body 132 are inserted into and fixed in the mounting holes 102.

[0043] In this case, when the fixing rib 134 of the outer holder 130 is inserted into the mounting hole 102, the fixing rib 134 is brought into metallic contact with the housing 100, which may result in a rattling connection if a clearance is generated between the fixing rib 134 and the mounting hole 102.

[0044] For this reason, the rubber is vulcanized or an adhesive is applied to the surface of the mounting rib 134 of the outer holder 130 to prevent metal-to-metal contact and to compensate for the rattling connection when play is created.

[0045] Furthermore, a clamp contact groove 136 is formed in a portion of the outer surface of the outer holder 130 between the fixing ribs 134.

[0046] The clamping device contact groove 136 is designed to receive a resilient web 142 of a clamping device 140 ( Fig. 10), which is a type of tool for simultaneously inserting the insulator 110 in which the metal core 120 is embedded and the outer holder 130 in close contact with the support blades 112 of the insulator 110 into the housing 100, as described below.

[0047] As in Fig. As shown in Figure 12, a rubber stopper 104, which is in close contact with the gear support bracket 150, is attached to the front portion of the housing 100 for vibration isolation. The rubber stopper 104 serves to prevent direct contact between the metallic housing 100 and the metallic gear support bracket 150 and to protect against micro-vibrations.

[0048] Next, a procedure for assembling the transmission mount for a vehicle according to the invention having the structure described above will be described.

[0049] The Fig. 8 to 10 show a process of assembling the transmission mount according to the invention.

[0050] First, the housing 100 is inserted into the mounting hole 202 formed in the side member 200 of the vehicle body and then fixed in advance by welding or the like, as shown in Fig. 8 is shown.

[0051] Next, the outer holder 130 is brought into close contact with each of the support leaves 112 of the insulator 110 having the metal core 120 therein, and then the resilient web 142 of the jig 140 is placed into the jig contact groove 136 of the outer holder 130.

[0052] Since the outer holder 130 is pressed by means of the inserted resilient web 142 of the clamping device 140, the outer holder 130 is brought into close contact with the surface of each of the support blades 112, resulting in a compressed and deformed state of each of the support blades 112.

[0053] Next, an operator holds the jig 140 and inserts the insulator 110 with the metal core 120 therein and the outer holder 130 into the housing 100 through a rear opening of the housing 100.

[0054] Here, the operator presses the clamp 140 until the buffer projections 124, which are covered by the insulator 110, touch the wall surface around the front rectangular opening of the housing 100 to define the positions of the metal core 120.

[0055] When the jig 140 is removed, that is, the resilient rib 142 of the jig 140 is removed from the jig contact groove 136 of the outer holder 130, the compressed and deformed support sheet 112 expands to its original level, which in turn urges the outer holder 130 to be pushed outward, and the fixing rib 134 of the outer holder 130 is inserted and fixed into the mounting hole 102 of the housing 100. When the fixing rib 134 is fixed, the process of assembling the insulator 110 with the metal core 120 therein and the outer holder 130 into the housing 100 is completed.

[0056] Next, as in Fig. 12, the rubber stopper 104 for vibration isolation is brought into close contact with the front portion of the housing 100, and the gear support bracket 150 connected to a gear 300 is firmly inserted into and screwed to the screw hole 126 of the metal core 120 exposed through the front rectangular opening of the housing 100, whereby the gear suspension according to the invention is connected to the gear in a manner that enables vibration isolation.

[0057] Therefore, as in Fig. 11, absorbs the vibrations transmitted from the drive train to the transmission by deforming the isolator 110 vertically and horizontally.

[0058] The invention provides the following effects through the above description.

[0059] First, the transmission mount is improved to have a structure capable of being press-fitted to the vehicle's side member only by means of the insulator, which eliminates the need for a bridge bracket incorporated into the transmission mount, thus reducing the number of parts, weight, and cost.

[0060] Secondly, since the transmission mount is press-fitted into the longitudinal member of the vehicle body by means of the jig type tool, the process of assembling the transmission mount can be easily performed, and the assemblability can be improved by eliminating the existing bolting process for assembling the transmission mount.

Claims

[1] Transmission suspension for a vehicle, comprising: a housing (100) configured to be inserted and mounted in a mounting opening (202) formed in a side member (200) of a vehicle body; an insulator (110) having a plurality of support blades (112) integrally formed on an outer surface thereof so as to be inserted and mounted in the housing (100); a metal core (120) inserted into the insulator (110); and an outer holder (130) which is inserted into the housing (100) together with the insulator (110) in a state in which it is in contact with a surface of each of the support blades (112) such that it is fixed to the housing (100), wherein the housing (100) is provided with a pair of mounting holes (102) at regular intervals along the circumferential direction, and fixing ribs (134) inserted into and fixed to the mounting holes (102) are integrally formed on an outer surface of the outer holder (130). [2] The transmission mount of claim 1, wherein a tensioner contact groove (136) is further formed in a portion of the outer surface of the outer bracket (130) between the mounting ribs (134). [3] A transmission mount according to claim 1 or 2, wherein the mounting ribs (134) each have a surface formed by vulcanized rubber or an adhesive applied to the surface. [4] A transmission mount according to any one of claims 1 to 3, wherein support bodies (122) covered by the support blades (112) of the insulator (110) are integrally formed in an upper and a lower position on both sides of the metal core (120). [5] A transmission mount according to any one of claims 1 to 4, wherein buffer projections (124) covered by the insulator (110) are further formed on both sides of the metal core (120) for defining positions. [6] A transmission mount according to any one of claims 1 to 5, wherein a screw hole (126) screwed to a transmission support bracket (150) is formed in a front portion of the metal core (120). [7] A transmission mount according to any one of claims 1 to 6, wherein a rubber stopper (104) in contact with the transmission support bracket (150) is further attached to a front portion of the housing (100) for vibration isolation.

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