KR102664095B1 - Transmission mount - Google Patents

Abstract

The present invention relates to a transmission mount, which can improve noise problems that may occur between a stopper and a transmission bracket, reduce the number of parts and reduce costs, and improve vibration insulation performance as well as vehicle handling performance. The main purpose is to provide a transmission mount. In order to achieve the above object, it includes a mounting bracket that is formed in a shape having an internal space and is fastened to the vehicle body side, and an insulator assembly that is accommodated in the inner space of the mounting bracket and coupled to the transmission side, The insulator assembly includes a core fastened to the transmission side, a plate integrally installed at the lower end, and an insulator integrally coupled to the core and the plate, and the core has a downward protrusion formed to protrude downward, and protrudes on both sides. A transmission mount is disclosed, which is provided with a lateral protrusion formed so as to control the movement of the transmission by contacting a plate with a stopper portion configured to surround the lower protrusion with an insulator.

Description

Transmission mount

The present invention relates to a transmission mount, and more specifically, to a transmission mount that provides load support and movement control functions for a transmission in a vehicle, as well as vibration and noise reduction functions.

Passenger cars mainly use monocoque bodies, which are light in weight and highly productive, instead of frame bodies. Monocoque bodies have a structure in which a separate frame is removed, and the powertrain is mounted directly on the car body.

In general, a vehicle's power train (P/T) refers to a series of devices that transmit power generated from the engine to the driving wheels, including the engine, clutch, transmission, and final reduction gear.

In the monocoque body, the car body itself functions as a frame and suspension and chassis parts are mounted, but a subframe and mounting members are used to prevent the vibration of the powertrain from being directly transmitted to the car body and to disperse the shock in case of a vehicle collision. It is installed.

At this time, the subframe is mounted on the lower part of the car body so that steering and suspension devices, such as suspension struts and knuckles, can be connected.

Additionally, the mounting members include an engine mount that is fixed to the vehicle body and connected to the engine, a transmission mount that is fixed to the vehicle body and connected to the transmission, and roll rods that connect the engine or transmission to the subframe.

Among these, the transmission mount supports the load of the powertrain on the transmission side and at the same time provides a vibration isolation function that prevents vibration from being transmitted from the powertrain to the vehicle body.

Prior art documents related to the transmission mount 100 include Registered Patent No. 10-1823904 (January 25, 2018), Published Patent No. 10-2018-0044565 (May 3, 2018), and Registered Patent No. 10-1256860 (April 2013). .16.), Publication Patent No. 10-2019-0020456 (2019.3.4.), etc.

The transmission mount functions to support load and control movement while simultaneously reducing vibration and noise, and is usually equipped with an insulator made of an elastic material such as rubber.

FIG. 1 is a perspective view showing a known transmission mount, FIG. 2 is a perspective view showing a stopper in a known transmission mount, and FIG. 3 is a view showing a stopping portion in a known transmission mount.

As shown, in the transmission mount 1, an insulator 4 made of an elastic material (e.g., rubber or synthetic resin, etc.) is placed within a mounting bracket 2 having a cylindrical shape of a predetermined size, and is connected to a metal core 5. It is built together in a combined state.

At this time, one end of the core (5) is mounted to protrude out of the mounting bracket (2) through the opening (3) formed on one side of the mounting bracket (2) (the side facing the transmission bracket when mounted on the vehicle body), and the core A bolt hole (6) is drilled at the end of (5) and fastened with a transmission bracket (9) and bolt (10) connected to a transmission (not shown) in the vehicle's powertrain.

In addition, in order to prevent the insulator (4) and mounting bracket (2) from being damaged due to a rapid increase in the load transmitted to the insulator (4) depending on the vehicle's driving situation, a stopper (7) is installed on the normal transmission mount (1). Install additionally.

Conventionally, when mounting the stopper (7) on the transmission mount (1), the stopper (7) was manufactured separately as shown in (a) of Figure 2 and then fixed to the mounting bracket (2) by adhesive method, or as shown in (a) of Figure 2. As shown in b), the stopper (7) is molded so that the separately manufactured insert member (8) made of metal is inserted on the inside, and then the stopper's insert member (8) is mounted by fastening it to the mounting bracket (2). .

In this way, a separate stopper (7) is installed (adhesive or bracket fixed) on the outside of the transmission mount (1) to control powertrain displacement during vehicle handling, thereby improving the sense of unity between the powertrain and the vehicle body, and improving handling responsiveness and Improves vehicle tracking capabilities.

However, the conventional transmission mount has the following problems.

First, when the vehicle is suddenly steered, noise may occur between the stopper (7) mounted on the transmission mount (1) and the transmission bracket (9) fastened to the transmission.

In order to improve this problem of noise generation, if a rubber material with self-lubricating performance is applied to the stopper (7) of the transmission mount (1), the adhesive strength with the mounting bracket (2) becomes weak, so the stopper (7) must be attached to the mounting bracket ( 2), there may be difficulty in installing it, and the stopper (7) may be separated from the transmission mount (1) after the vehicle is damaged.

Additionally, there is a risk that NVH performance may deteriorate when displacement suppression increases the lateral characteristics of the insulator 4.

In addition, in relation to the problem of the insulator's static characteristics in the Y direction, an internal structure of the transmission mount with a lateral stopping structure is needed, and thus there is a need to improve the conventional transmission mount.

Therefore, the present invention was created to solve the above problems, and can improve the noise problem that may occur between the stopper and the transmission bracket, reduce the number of parts and reduce costs, and improve vibration insulation performance as well as vehicle safety. The purpose is to provide a transmission mount that can improve handling performance.

In order to achieve the above object, according to an embodiment of the present invention, a mounting bracket is formed in a shape having an internal space and is fastened to the vehicle body, and is combined with the mounting bracket in a state accommodated in the internal space of the mounting bracket and fastened to the transmission side. and an insulator assembly, wherein the insulator assembly includes a core fastened to the transmission side, a plate integrally installed at the lower end, and an insulator integrally coupled to the core and the plate, and the core is formed to protrude downward. A transmission mount is provided, wherein a lower protrusion and a lateral protrusion are formed to protrude on both sides, and a stopper portion in which an insulator surrounds the lower protrusion contacts a plate to control movement of the transmission.

As a result, the transmission mount according to the present invention can improve noise problems that may occur between the stopper and the transmission bracket, reduce the number of parts and reduce costs, and improve vibration insulation performance as well as vehicle handling performance. There is a possible effect.

Figure 1 is a perspective view showing a known transmission mount.
Figure 2 is a perspective view showing a stopper in a known transmission mount.
Figure 3 is a diagram showing a stopping portion in a known transmission mount.
Figure 4 is an exploded perspective view showing the configuration of a transmission mount according to an embodiment of the present invention.
Figure 5 is an assembled perspective view of a transmission mount according to an embodiment of the present invention.
Figure 6 is a front view of a transmission mount according to an embodiment of the present invention.
Figure 7 is a perspective view showing an insulator assembly in a transmission mount according to an embodiment of the present invention.
8 to 10 are diagrams showing the core of an insulator assembly in a transmission mount according to an embodiment of the present invention.
Figure 11 is a perspective view showing a plate of an insulator assembly in a transmission mount according to an embodiment of the present invention.
Figure 12 is a cross-sectional view taken along line 'A-A' in Figure 5.
Figure 13 is a cross-sectional view taken along line 'B-B' in Figure 5.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

Figure 4 is an exploded perspective view showing the configuration of a transmission mount according to an embodiment of the present invention, and Figure 5 is an assembled perspective view of a transmission mount according to an embodiment of the present invention.

Additionally, Figure 6 is a front view of a transmission mount according to an embodiment of the present invention, and Figure 7 is a perspective view showing an insulator assembly in the transmission mount according to an embodiment of the present invention.

FIGS. 8 to 10 are views showing the core of the insulator assembly in the transmission mount according to an embodiment of the present invention. FIG. 8 is a perspective view of the core, FIG. 9 is a front view of the core, and FIG. 10 is a side view of the core.

Figure 11 is a perspective view showing a plate of an insulator assembly in a transmission mount according to an embodiment of the present invention, Figure 12 is a cross-sectional view taken along line 'A-A' in Figure 5, and Figure 13 is line 'B' in Figure 5. This is a cross-sectional view taken along -B'.

First, as shown, the transmission mount 100 according to an embodiment of the present invention includes a mounting bracket 110 formed in a cylindrical shape with an internal space and fastened to the vehicle body (not shown), and It includes an insulator assembly 120 that is stored in the inner space of the mounting bracket 110 and fastened to the transmission (not shown) side.

As illustrated in FIG. 4, the mounting bracket 110 may be formed in a substantially hexahedral cylindrical or square container shape having a front portion 111, top and bottom portions 112 and 113, and side portions 114. A fastening part 115, which is a part fastened to the vehicle body using fastening members (not shown) such as bolts, is provided on the side.

Additionally, an opening 111a through which at least a portion of the core 122 can pass is formed in the front portion 111 of the mounting bracket 110.

The insulator assembly 120 includes an insulator 121 made of an elastic material such as rubber, a core 122 coupled to the insulator 121 and fastened to the transmission side, and a mounting bracket 110 integrally installed at the lower end. ) is configured to include a plate 129 coupled to the inner surface of the lower surface 113, that is, the inner space bottom of the mounting bracket 110.

As in the prior art, the insulator 121 functions to insulate vibration while supporting the core 122 coupled to the transmission side in the inner space of the mounting bracket 110, and is mounted while being integrally coupled to the core 122. It is placed in the internal space of the bracket 110.

In the insulator assembly 120, when the core 122 is assembled together with the insulator 121 into the inner space of the mounting bracket 110, the tip 126 of the core 122 is in the opening 111a. It is exposed to the outside of the mounting bracket 110 through.

At this time, the distal end 126 of the core 122 protrudes forward to the outside through the opening 111a from the front part 111 of the mounting bracket 110, and a bolt hole 127 is formed in the core 122. Thus, the core 122 of the insulator assembly 120 is fastened to a transmission bracket (not shown) coupled to the transmission by a bolt (not shown) through the bolt hole 127.

That is, an opening 111a is formed in the front part 111 of the mounting bracket 110, which is the part facing the transmission bracket when mounted on the vehicle body, and the tip 126 of the core 122 passes through the opening 111a. It protrudes and is fastened to the transmission bracket, which is a structure on the transmission side.

It should be noted that the configuration in which the core 122 is bolted to the transmission bracket is not illustrated as a separate drawing because there is no difference compared to the conventional configuration (see FIG. 3).

In addition, as illustrated in FIGS. 8 to 10, the core 122 has lateral protrusions 124 on both left and right side surfaces that protrude laterally and are formed to be long in the front-to-back direction, and the lower surface portion 113 has side protrusions 124 that extend approximately in the front-back longitudinal direction. It has a lower protrusion 125 that protrudes downward so as to be located rearward.

In addition, a plate 129 is installed at the lower end of the insulator assembly 120. The plate 129 has a square frame shape with an approximately rectangular hole 130 formed therein, and has the front and rear inner ends and the left and right inner sides of the hole 130. A locking end 135 that is bent downward is formed at each end.

The core 122 and the plate 129 are integrally coupled to the insulator 121 as shown in FIGS. 12 and 13, and the insulator 121 surrounds the core 122 and the plate 129 through a curing process. It is integrated with the core 122 and the plate 129 by being integrally molded.

At this time, the part of the core 122 that is fastened to the transmission side and the rear end surface 128 of the core 122, more specifically, the front end 126 and the rear end surface 128 of the core 122 that are fastened to the transmission bracket. ), the insulator 121 may be vulcanized to surround the remaining portion, and the insulator 121 may be vulcanized to surround the entire plate 129.

Referring to FIG. 12, it can be seen that the insulator 121 is molded to surround the entire lower protrusion 125 of the core 122, and in the transmission mount 100 according to an embodiment of the present invention, the core 122 is formed as described above. ) The portion formed by the lower protrusion 125 surrounded by the insulator 121 becomes the stopper portion 123a.

In addition, as can be seen in FIG. 12, the stopper part 123a (the insulator part surrounding the stopper part) and the insulator part surrounding the rear part 134 of the square shape of the plate 129 are structured separately from each other. Bar, the two sides are structured to be spaced apart at a predetermined distance front and rear.

At this time, the stopper portion 123a (the insulator portion surrounding the lower protrusion of the core) and the insulator portion surrounding the rear portion 134 of the plate 129 are spaced apart from each other in a state where they face each other forward and backward.

Additionally, in the present invention, the stopper portion 123a is designed to contact the insulator portion surrounding the rear portion 134 of the plate 129 when the insulator 121 is compressed or moved, thereby causing interference between both sides.

Referring to FIG. 12, it can be seen that the rear end surface 128 of the core 122 is exposed.

And, except for the insulator portion surrounding the lower protrusion 125 of the core 122 (the insulator portion constituting the stopper portion), the remaining insulator portion surrounding the core 122 is the front portion of the plate 129. (131), the left part (132), the right part (133), and the rear part (134) of the plate (129) are directly connected to the parts surrounding both ends without any gap or gap.

Referring to FIG. 13, the cross-sectional shape of the portion where the lateral protrusion 124 of the core 122 is located shows that the insulator portion surrounding the core 122 and the insulator portion surrounding the plate 129 are integrally connected. can see.

In addition, as shown in FIG. 12, the tip 126 of the core 122 is exposed rather than surrounded by the insulator 121, but the left and right sides of the insulator 121 surrounding the lateral protrusion 124 of the core 122 The side portion can be seen to be spaced apart from the inner surface of the front portion 111 of the mounting bracket 110 at a predetermined distance in the inner space of the mounting bracket 110.

Ultimately, in the transmission mount 100 according to an embodiment of the present invention, the stopper part 123a, which is the part where the insulator 121 surrounds the lower protrusion 125 of the core 122, is located at the front of the powertrain (transmission). It serves as a rear stopper that limits backward movement (i.e., a right-directional stopper that limits rightward movement in the drawing).

In addition, the left and right sides 123b of the insulator 121 surrounding the left and right side protrusions 124 of the core 122 are omnidirectional stoppers (leftward movement in the drawing) that limit the forward movement of the powertrain (transmission). It becomes a left-handed stopper that limits .

In the following description, the left and right sides 123b of the insulator 121 surrounding the left and right side protrusions 124 of the core 122, that is, the omnidirectional stopper, will be referred to as an external stopper.

In the above description, front and rear define directions based on the mount 100, and the side on which the transmission bracket (not shown) is located in the mount 100, that is, the side fastened to the transmission, is defined as the front, and the opposite side is defined as the rear. .

In FIGS. 12 and 13, the transmission bracket (not shown) is located on the left side of the drawing, so the rearward movement of the transmission and transmission bracket can be said to be a rightward movement in the drawing, and the forward movement of the transmission and transmission bracket can be said to be a leftward movement in the drawing. It can be said to be a directional movement.

In addition, in FIGS. 12 and 13, the transmission bracket (not shown) is located on the left side of the mount 100, but based on the front, rear, left, and right directions of the vehicle, the transmission bracket is located on the right side of the mount 100 as shown in FIG. 3. In this case, the left and right directions in the drawings used in FIGS. 12 and 13 and their description above may be opposite to the left and right directions of the actual vehicle.

In this way, the configuration of the transmission mount according to the embodiment of the present invention has been described in detail. In the transmission mount according to the embodiment of the present invention, the stopper manufactured and attached separately is deleted.

This makes it possible to eliminate the process of installing a stopper, so the mount according to the present invention ultimately has advantages such as reduction in the number of parts, reduction in the number of processes, and cost reduction due to deletion of parts.

In addition, the quality of joints and lateral displacement can be improved, and as spring characteristics in the left and right directions are increased, handling integrity and performance can be improved.

To further explain the action and effect of the improved stopping means in the mount according to the present invention, as described above, the rearward movement (movement in the right direction in the drawing) and displacement of the powertrain (transmission), that is, the actual vehicle Regarding the leftward movement and displacement of the powertrain based on the front, rear, left, and right directions in ) is controlled.

In addition, regarding the forward movement (movement in the left direction in the drawing) and displacement of the powertrain (transmission), that is, the rightward movement and displacement of the powertrain based on the front, rear, left, and right directions in the actual vehicle, the core 122 The external stopper 123b, which is a part of the insulator surrounding the left and right side protrusions 124, is controlled.

Accordingly, the mount of the present invention can control both left and right lateral displacement of the powertrain and at the same time reduce the lateral displacement characteristics of the insulator bridge 121a.

In this way, when the lateral displacement characteristics of the insulator bridge 121a are lowered, idle vibration, etc. can be minimized, making it possible to improve NVH performance and simultaneously improve handling performance.

In addition, in the present invention, the gap (rear stopper gap) between the insulator part of the stopper part 123a and the insulator part surrounding the rear part 134 of the plate 129, and the left and right side protrusions of the core 122 ( The gap (omnidirectional stopper gap) between the external stopper 123b, which is the insulator part surrounding 124), and the inner surface of the front part 111 of the mounting bracket 110 (omnidirectional stopper gap) can be varied for each position or set in various ways, and the mount The manufacturing Y-direction bridge static characteristics also have the advantage of being able to be set without being limited by handling performance.

In addition, since the mount 100 according to the present invention can freely adjust the stopper gap, it can provide stable vibration isolation performance even under powertrain torque load in an idle state, such as the D stage condition of an automatic transmission vehicle.

In addition, in the mount 100 according to the present invention, the mounting bracket 110 is coupled to the vehicle body, and the core tip 126 is exposed and not covered by the insulator 121 in the core 122 of the insulator assembly 120. ) is fastened to the transmission bracket and bolts, the insulator assembly 120 connects the vehicle body side to which the mounting bracket 110 is coupled and the transmission to which the transmission bracket is coupled. The bridge 121a of the insulator 121 is connected to the transmission It supports the load and insulates vibration between the transmission and the vehicle body.

At this time, the bridge 121a of the insulator 121 deforms according to the flow of the transmission (powertrain) and, as a result, controls the flow of the transmission. When the vehicle makes a sharp turn, the flow of the transmission (powertrain) becomes excessive and the transmission It moves in opposition to the vehicle's movement, and depending on the principle of action and reaction at this time, it can weaken the sense of unity during sudden steering and have a negative effect on handling followability.

However, in the mount 100 according to the present invention, the flow of the transmission (powertrain) can be suppressed by varying the stopping positions before and after (left and right in the drawing) inside the mounting bracket 110.

In other words, when the vehicle turns to the left, the powertrain is tilted to the right due to the external stopper 123b of the insulator assembly 120, that is, the outer surface of the insulator portion surrounding the left and right side protrusions 124 of the core 122 is attached to the mounting bracket. It can be controlled while contacting the inner surface of the front part 111 of (110).

In addition, the powertrain tilt to the left when the vehicle turns to the right can be controlled by contacting the internal stopper of the insulator 121, that is, the stopper portion 123a with the insulator portion surrounding the rear portion 134 of the plate 129. You can.

As a result, the handling performance of the vehicle can be improved, and in particular, the characteristics of the lateral bridge can be freely set by tuning the thickness of the bridge 121a, so it is possible to tune and set the NVH performance effect and the handling performance effect separately from each other. There is an advantage.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements can be made by those skilled in the art using the basic concept of the present invention as defined in the following patent claims. It is also included in the scope of rights of the present invention.

100: Transmission mount 110: Mounting bracket
111: front part 111a: opening part
112: upper surface 113: lower surface
114: side part 115: fastening part
120: insulator assembly 121: insulator
121a: bridge 122: core
123a: stopper part 123b: external stopper
124: lateral protrusion 125: downward protrusion
126: tip 127: bolt hole
128: rear end surface 129: plate
130: Hole 131: Front side
132: left side 133: right side
134: rear part 135: catching end

Claims (5)

It includes a mounting bracket formed in a shape having an internal space and fastened to the vehicle body, and an insulator assembly housed in the internal space of the mounting bracket and coupled to the transmission side,
The insulator assembly includes a core fastened to the transmission side, a plate integrally installed at the lower end, and an insulator integrally coupled to the core and the plate,
The core is provided with a downward protrusion formed to protrude downward and a side protrusion formed to protrude to both sides,
The stopper part, which is composed of an insulator surrounding the lower protrusion, is in contact with the plate to control the movement of the transmission,
An external stopper in which an insulator surrounds the lateral protrusion of the core is positioned spaced apart from the inner surface of the mounting bracket in the inner space of the mounting bracket, and the external stopper contacts the inner surface of the mounting bracket to prevent the movement of the transmission. It is designed to be controlled,
The external stopper is positioned spaced apart from the inner surface of the front part of the mounting bracket to contact the inner surface of the front part of the mounting bracket, and the stopper part is spaced apart from the insulator part surrounding the rear part of the plate. A transmission mount, characterized in that it is positioned to contact the insulator portion surrounding the rear portion of the plate.
delete delete In claim 1,
The plate is provided in the shape of a square frame with a rectangular hole,
A transmission mount, characterized in that locking ends of a downwardly bent shape are formed on the front and rear inner ends and the left and right inner ends of the hole, respectively.
In claim 1,
The plate is provided in the shape of a square frame with a rectangular hole,
A locking end bent downward is formed at the inner end of the rear portion of the plate,
A transmission mount, wherein the stopper portion is brought into contact with an insulator portion surrounding the rear portion of the plate including the locking end portion.