KR101256860B1 - Hydro transmission mount - Google Patents

Abstract

PURPOSE: A hydro transmission mount unit is provided to improve durability and vibration insulating capacity in driving a vehicle by applying the hydro transmission mount unit, in which fluid is sealed, to a three points bearing type sub frame. CONSTITUTION: A hydro transmission mount unit comprises a bracket(10) connected to a power train; an insulator(20) insulating vibration by being inserted in the inside of the bracket; and a stopper(30) preventing the insulator from being separated from the bracket. The insulator comprises an outer pipe, an inner ring, an orifice assembly, a main rubber, and an inner core. The cylindrical outer pipe is attached to an inner surface of the bracket and supports inner components. The inner ring is attached to the inner surface of the outer pipe and includes a main chamber outlet. The orifice assembly is connected to an upper surface of the inner ring and includes a diaphragm. The main rubber is attached to an inner side of the orifice assembly and the inner ring, and the inner core is located to the center of the main rubber.

Description

Hydro Transmission Mount

The present invention relates to a transmission mount, and more particularly, to a hydro transmission mount that can improve the durability performance irrespective of the vibration input to the vehicle.

The transmission of the vehicle is a device that transmits the power of the engine to the driving wheels by changing the rotational force and speed to match the driving state of the vehicle, and is directly connected to the crankshaft of the engine through the clutch. Therefore, the transmission generates not only its own mechanical drive but also a lot of vibration and noise due to the influence of the engine driving.

Therefore, in installing the transmission to the vehicle body, in order to minimize the transmission of vibration and noise generated from the engine and the transmission to the vehicle body to improve the ride comfort of the vehicle occupant, the transmission is mounted on the vehicle body frame using the transmission mount. .

The method for assembling the transmission to the vehicle body frame depends on the structure of the subframe of the vehicle. In the '#' type subframe structure as shown in FIG. 1, the front and rear roll mounts are shown. After fastening the power train on the subframe by fastening the deck to the vehicle body, the coupling is completed by fastening the engine mount and transmission mount in the subsequent process.

On the other hand, in the 'H' type subframe structure, which is a three-point support type as shown in Fig. 3, the engine mount and transmission are not fixed by placing the power train on the subframe with only the rear roll rod pre-tightened. The mounting is completed by simultaneously tightening the mount.

Recently, in order to reduce the vehicle production cost and weight, even the high torque engine uses a lot of three-point 'H' type subframes and mounts, and thus the existing four-point type '#' type subframes are used. It is commonly used as a three-point mounting system without using frames and mounts.

However, the transmission mounts used in the three-point mounting system have different structures in which the inner cores are different, and it is difficult to apply the hydro mount type in which the fluid is enclosed.

Accordingly, active research and development of the hydro mount in the three-point support method are in progress, but the conventionally used hydro mounts have implemented damping in the vibration region having one specific frequency, It is lacking.

That is, in order to apply to high-end models or increase NVH performance, a hydro mount is applied to the structure to prevent the departure in the event of a crash.

Such a hydro mount has improved driving performance compared to a conventional solid mount, but has a disadvantage in terms of durability and process progress due to a complicated structure in the same internal space.

In addition, in order to apply a fluid-mounted hydro mount to a current mass production vehicle, it is necessary to maintain the same size (Φ 95) of the conventionally used mount, but the hydro mount in the state of maintaining the same size as compared to the conventional rubber mount Since the length of the high rubber | gum becomes short, there existed a problem that it was disadvantageous in terms of durability.

An object of the present invention for solving the above problems, by applying a hydro-mounted hydromount to the three-point subframe of the frame, to improve the vibration insulation performance while driving the vehicle and at the same time to further improve the durability performance It is to provide a hydro transmission mount.

The configuration of the present invention for achieving the above object, in the transmission mount for reducing the vibration transmitted from the transmission including the bracket, insulator and stopper, the insulator is in close contact with the inner surface of the bracket to maintain the shape A cylindrical outer pipe for supporting a component located therein; An inner ring positioned in close contact with an inner surface of the outer pipe and having a main chamber outlet through which a fluid can pass; An orifice assembly configured to engage with an upper surface of the inner ring and having a diaphragm configured to temporarily store a fluid on one side thereof; A central portion formed in close contact with the inner surfaces of the inner ring and the orifice assembly and integrally formed with the bridge extending from the outer circumference thereof, the central portion of which is formed to partially protrude to the outside, and having a plurality of spaces in which a fluid can be enclosed; An inner core formed to be inserted into a central portion of the rubber and having a plurality of hollows penetrating in a longitudinal direction; And a control unit.

In addition, an inner flow passage connected to the diaphragm is formed along the outer circumference of the inner ring, and an orifice flow passage connected to the diaphragm is formed along the outer circumference of the orifice assembly, thereby joining the inner ring and the orifice assembly. Accordingly, the inner flow passage and the orifice flow passage are integrally connected to provide a passage through which fluid flows from the main chamber outlet to the diaphragm.

In addition, the lower end of the inner core further includes a displacement limiting stopper protruding toward the bottom to be fixed to the rubber and fixed to the longitudinal direction of the inner core is inserted into a plate-shaped departure prevention plate fixedly coupled to the inner core. It is preferable to make it.

Furthermore, each of the inner ring and orifice assembly has a cylindrical shape in which both ends thereof are partially cut out to form a cylindrical shape according to the combination of the inner ring and the orifice assembly, and a plurality of protruding outwards at both ends of the inner ring It is preferable that the protrusions are formed and a plurality of coupling grooves are formed at both ends of the orifice assembly so as to penetrate the thickness so that the protrusions and the coupling grooves are fitted to each other.

In particular, the height of the rubber is relatively larger than the diameter of the inner ring, it is more preferable that the rubber is in contact with the inner surface of the orifice assembly to maintain the compressed state when the inner ring and the orifice assembly is combined. Do.

The effect of the present invention having the configuration as described above, such as the characteristics of the hydro-mount has the advantage that the vibration performance is more improved than the conventional rubber mount, as well as the durable displacement section due to the separate structure of the inner ring and orifice assembly Since the design freedom is increased compared to the existing hydro mount by reducing the size, the durability of the hydro transmission mount itself is further improved.

1 is a perspective view showing a subframe and a mount of a four point support method;
Figure 2 is a schematic diagram showing a process in which vibration in the front and rear direction of the vehicle is applied to the mount fastened to the four-point support subframe.
3 is a perspective view showing a subframe and a mount of a three point support method;
4 is a perspective view showing a rubber mount fastened to a three-point subframe.
Figure 5 is an exploded perspective view of the rubber mount of Figure 4;
FIG. 6 is a schematic diagram showing a process in which vibration in the front-rear direction of a vehicle is applied to the rubber mount of FIG. 4; FIG.
FIG. 7 is an exploded perspective view showing a conventional hydro mount used in a three-point support subframe; FIG.
8 is a perspective view of a hydro transmission mount according to the present invention;
9 is a perspective view showing an insulator used in the present invention.
10 is an exploded perspective view showing an insulator used in the present invention.
Figure 11 is an exploded perspective view showing the inner core used in the present invention.
12 to 15 are perspective views illustrating a process of coupling the insulator used in the present invention.
16 to 17 is a perspective view showing a process of moving the fluid in the insulator used in the present invention.
Figure 18 is a front view showing a hydro transmission mount used in the prior art.
Figure 19 is a front view of the hydro transmission mount roll in accordance with the present invention.
20 is a graph showing the amount of change in strain according to the displacement of the hydrotransmission mount and the hydrotransmission mount according to the present invention.
FIG. 21 is a graph showing the loss coefficient (Tan d) value according to the frequency of a rubber mount and a hydro transmission mount according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention is a transmission mount for use in a three-point support subframe rather than a four-point support subframe, and particularly a hydro for enclosing a fluid inside the mount of the three-point support method to further improve the vibration insulation effect. It is about the transmission mount.

Recently, various mounting mounts that can be used in three-point support systems have been developed as the mounting system is shared by three-point support subframes instead of four-point support subframes. In addition to improving the damping effect, the situation is required to mount a hydro transmission to further improve the durability performance of the operation of the mount.

That is, the rubber mount of the four-point support type as shown in Figures 1 and 2 has the advantage that NVH performance is advantageous because the spring characteristics in the front and rear direction of the vehicle is low, but a separate rubber stopper or the like is installed to achieve vibration performance. There was a problem to be done.

In addition, the mount used for the three-point support subframe is located in a direction orthogonal to the conventional direction, so that the spring characteristics in the front and rear direction of the vehicle increases, the angle is increased, and the front and rear stoppers integrally with the main body. Since it is vulcanized and formed, there is no need for a separate stopper or the like.

That is, the rubber mount of the three-point support type as shown in Figs. 3 to 6 is a bracket (1) coupled to the powertrain and supported, an insulator (2) inserted into the bracket (1) to insulate vibrations And a rubber stopper (3) bonded to the bracket (1) to prevent the insulator (2) from being separated from the bracket (1).

In the case of such a rubber mount, the shake performance of vibration isolation input in the up and down direction of the vehicle is more disadvantageous, and a hydro mount in which a fluid is sealed has been developed.

The conventional hydro transmission mount as shown in Fig. 7 comprises a bracket 1, an insulator and a stopper 3, the insulator having a cylindrical outer pipe 4 and an outer pipe 4 inside. It consists of an inner ring 5 which is located, a rubber 6 inserted into the inner ring 5 and an inner core 8 inserted into the rubber 6, in particular of the rubber 6 A plurality of internal spaces (diaphragms 7) are formed therein, and an orifice 9 is positioned on the outer surface of the diaphragm 7 such that the fluid enclosed in the internal spaces is the inner ring 5 and the rubber 6. The vibration was attenuated while moving along the flow path and the orifice 9 formed on the outside of the.

However, in such a three-point hydro-transmission mount, the up and down damping performance can be improved, but the inner core (8), the rubber (6), etc. located in the interior continuously moving in accordance with the transmitted vibration Durability was disadvantageous, and thus there was a problem such as deterioration of mount performance and excessive replacement cost.

Accordingly, the present invention relates to a hydro transmission mount for further improving the durability performance while maintaining the damping performance to insulate the vibration, the present invention, the hydro transmission mount, in close contact with the inner surface of the bracket 10 to maintain the shape A cylindrical outer pipe 100 for supporting a component located therein; An inner ring 110 positioned to be in close contact with the inner surface of the outer pipe 100 and having a main chamber outlet 111 through which a fluid can pass; An orifice assembly (120) formed to be coupled to an upper surface of the inner ring (110) and having a diaphragm (122) on which one side temporarily stores fluid; The central portion formed in close contact with the inner surfaces of the inner ring 110 and the orifice assembly 120 and integrally formed with the bridge extending from the outer circumference is formed to partially protrude to the outside and a plurality of fluids may be enclosed therein. A rubber formed space 130; An inner core 140 formed to be inserted into a central portion of the rubber 130 and having a plurality of hollows penetrating in a longitudinal direction; And a control unit.

That is, as shown in Figure 8, the bracket 10 is coupled to the powertrain and supported, the insulator 20 is inserted into the bracket 10 to insulate vibration and the insulator 20 from the bracket 10 The stopper 30 is used to prevent the deviating from the same as in the conventional mount.

In addition, the same external shape, shape, and size (Φ 95) are manufactured as the transmission mount, which is being used in the same way, to be applied to vehicles in mass production, and the insulator 20 located only inside the bracket 10 is provided. By improving the structure and function of the vibration, the improvement of the insulation performance and the durability performance was achieved.

9 and 10, the insulator 20 used in the present invention includes an outer pipe 100, an inner ring 110, an orifice assembly 120, a rubber 130, and an inner core 140. And the like, and the inside of the rubber 130 is filled with fluid to move the fluid in accordance with the pressure of the vibration transmitted to achieve the insulation effect of the vibration.

That is, referring to FIGS. 9, 16, and 17 illustrating the insulator 20 in an assembled state, a main chamber (not shown) may be formed at a lower end of the rubber 130 to store fluid. As the vibration is transmitted to the insulator 20, the main chamber outlet 111 formed under the inner ring 110 receives a pressure of the fluid stored in the main chamber as the rubber 130 is compressed or deformed. Is discharged.

The outer surface of the inner ring 110 is in close contact with the inner surface of the outer pipe 100, the inner flow path 112 is formed along the outer periphery of the inner ring 110, The fluid discharged through the main chamber outlet 111 moves along the inner flow path 112 to insulate the vibration.

An orifice assembly 120 is coupled to an upper surface of the inner ring 110. An orifice flow passage 121 is formed along the outer circumference of the orifice assembly 120, and an upper portion of the orifice assembly 120 is formed. On one side is formed a diaphragm 122 in which the fluid is temporarily stored.

Accordingly, the end of the orifice flow passage 121 is connected to the diaphragm 122 so that the moving fluid can be temporarily stored in the diaphragm 122, and the inner ring 110 and the orifice assembly ( The inner flow passage 112 and the orifice flow passage 121 are integrally connected with each other to provide a passage through which the fluid can move from the main chamber outlet 111 to the diaphragm 122.

Therefore, by adjusting the size and position of the main chamber, the diaphragm 122, and variously adjust the length, width and depth of the inner flow path 112 and the orifice flow path 121, the user wants to attenuate Since it can correspond to the frequency of the vibration to be convenient, in particular, it is possible to more effectively achieve the attenuation of the vibration transmitted in the vertical direction.

Hereinafter, the assembly process of the present invention the hydro transmission mount will be described in more detail.

First, as shown in FIG. 12, the inner core 140 is positioned and coupled to the central portion of the rubber 130. In the conventional hydro mount, the inner core is inserted into the rubber to generate vibration. Since the inner core vibrated as much as the inner core vibrated or moved in accordance with the amount of the moving process, there was a problem in that the durability of the inner core was easily worn.

In the present invention, in order to solve this problem, as shown in Figure 11 formed a displacement limiting stopper 141 is projected toward the bottom at the bottom of the inner core 140 fixedly coupled to the rubber (130). In addition, it is inserted so as to be perpendicular to the longitudinal direction of the inner core 140 to form a separation prevention plate 142 of the plate shape fixedly coupled to the inner core 140.

The release preventing plate 142 is wide in the direction perpendicular to the longitudinal direction of the inner core 140, when the large displacement occurs in the left and right direction of the inner core 140, the inner ring 110 and the outer pipe It is for preventing a phenomenon such as bending or discharging to the outside of the 100, and also, in fastening the fastening bolt to the inner core 140 can be more easily coupled to the bracket 10 and the fastening bolt. Will be.

In addition, the displacement limiting stopper 141 may protrude from the lower end of the inner core 140 to be fitted into the lower end of the rubber 130, and thus may be large in the vertical direction of the inner core 140. When the displacement occurs, the deformation of the inner core 140 is prevented by the displacement limiting stopper 141, so that wear phenomenon due to excessive deformation of the rubber 130 may be prevented, thereby further improving durability. You can.

As such, after the outer surface of the inner core 140 and the inner surface of the rubber 130 are completely in contact with each other, the rubber rubber 130 is in close contact with the inner surface of the inner ring 110. This is illustrated in FIG.

That is, the inner core 140 is located at the center of the rubber 130, and the outer circumference of the rubber 130 is coupled to abut on the inner surface of the inner ring 110. The main chamber outlet 111 is formed in the lower portion of the inner ring 110 so that the fluid is discharged from the main chamber formed in the lower portion of the 130.

An inner flow path 112 is connected to an end of the main chamber outlet 111 to provide a space for moving the fluid discharged from the rubber 130.

Furthermore, each of the inner ring 110 and the orifice assembly 120 has a cylindrical shape in which both ends thereof are partially cut. For example, about three quarters of one cylindrical shape corresponds to the inner ring 110. About 1/4 circumference may be formed to correspond to the orifice assembly 120.

Of course, the size corresponding to the length of the circumference as above is just one example, and may be manufactured by variously adjusting the sizes of the inner ring 110 and the orifice assembly 120 as necessary.

According to the combination of the inner ring 110 and the orifice assembly 120 formed in this way to form a complete cylindrical shape, this coupling process is shown in FIG.

A plurality of protrusions 113 protruding outward are formed at both ends of the inner ring 110 that are cut out, and a plurality of coupling holes 123 are formed at both ends of the orifice assembly 120 to penetrate through the thickness thereof. In this case, the protrusion 113 and the coupling hole 123 may be made to be fitted to each other.

That is, the orifice assembly 120 is placed from the upper end of the inner ring 110 to which the rubber 130 is coupled, so that one cylinder is formed by fastening the corresponding protrusions 113 and the coupling holes 123. The shape is completed.

However, in this coupling process, in the present invention, the height from the lower end to the upper end of the rubber 130 is characterized in that it is formed relatively larger than the diameter of the inner ring 110, accordingly In accordance with the combination of the orifice assembly 120, the rubber 130 is always under the initial pressure and maintains a compressed state.

That is, when the inner ring 110 and the orifice assembly 120 are coupled, the rubber 130 is in contact with the inner surface of the orifice assembly 120 to maintain a compressed state to the bottom. 14 and 19 are shown in detail.

In the state in which the orifice assembly 120 is not coupled, the upper end of the rubber 130 is protruded to the outside of the inner ring 110, and the orifice assembly 120 is later coupled from the top. When the rubber 130 is partially compressed (PRELOAD) is combined.

Then, as shown in FIG. 15, by coupling the outer pipe 100 to the outer side of the inner ring 110 and the orifice assembly 120 to be coupled, the coupling of the insulator 20 used in the present invention is Will be completed.

According to the present invention, the length of the rubber portion 130 bridge portion of the present invention shown in Figure 19 compared to the conventional hydro-transmission mount shown in Figure 18 has been increased by about 5mm from 29mm to 34mm, accordingly, In addition to reducing the displacement section, the stress value under load was improved to improve durability.

Referring to FIG. 20, which is the result of the performance test, the previously used hydro transmission mount was about 14 mm in the movable section according to the load and vibration, and the maximum value of the strain in the 9.7 mm movement was about 54%. The amount tended to increase rapidly.

However, by caulking the orifice assembly 120 from the upper portion of the relatively large rubber 130 as in the present invention, since the rubber 130 is kept in a compressed state to receive a preload (PRELOAD), The movable section is reduced to about 9 mm in the endurance displacement section, and the maximum value of the strain is about 53%, indicating that the endurance performance is improved compared to the hydro transmission mount used in the prior art.

In addition, referring to FIG. 21, which shows the ratio of the loss coefficient representing the damping force to the frequency of vibration, the loss coefficient (Tan d) has a relatively high value at about 10 Hz compared to the non-hydro type general rubber mount. It can be seen that the shake vibration performance is improved by comparing the overall loss factor.

That is, the present invention not only has the advantage that the vibration performance is more improved than the rubber mounts conventionally used, such as the characteristics of the hydro mount, and also the endurance displacement section due to the separate structure of the inner ring 110 and the orifice assembly 120. Since the design freedom is reduced compared to the existing hydro mount by reducing, there is an advantage to further improve the durability performance of the hydro transmission mount itself.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

10: bracket 20: insulator
30: Stopper
100: outer pipe 110: inner ring
111: main chamber outlet 112: inner channel
113: protrusion 120: orifice assembly
121: orifice flow path 122: diaphragm
123: coupling hole 130: high
140: inner core 141: displacement limit stopper
142: departure prevention plate

Claims (5)

In the transmission mount for reducing the vibration transmitted from the transmission, including the bracket 10, the insulator 20 and the stopper 30, the insulator 20,
A cylindrical outer pipe 100 in close contact with an inner surface of the bracket 10 to maintain a shape and support a component located therein;
An inner ring 110 positioned to be in close contact with the inner surface of the outer pipe 100 and having a main chamber outlet 111 through which a fluid can pass;
An orifice assembly (120) formed to be coupled to an upper surface of the inner ring (110) and having a diaphragm (122) on which one side temporarily stores fluid;
The central portion formed in close contact with the inner surfaces of the inner ring 110 and the orifice assembly 120 and integrally formed with the bridge extending from the outer circumference is formed to partially protrude to the outside and a plurality of fluids may be enclosed therein. A rubber formed space 130;
An inner core 140 formed to be inserted into a central portion of the rubber 130 and having a plurality of hollows penetrating in a longitudinal direction; Hydro transmission mount, characterized in that comprises a.
The method of claim 1,
An inner flow path 112 connected from the main chamber outlet 111 is formed along the outer circumference of the inner ring 110, and an orifice flow path connected to the diaphragm 122 is formed along the outer circumference of the orifice assembly 120. And an inner passage 112 and an orifice passage 121 are integrally connected to each other according to the combination of the inner ring 110 and the orifice assembly 120 to form the dia from the main chamber outlet 111. Hydro transmission mount, characterized in that it provides a passage for fluid to move up to the ram (122).
The method of claim 1,
The inner core 140 is inserted into the lower end of the inner core 140 so as to be perpendicular to the longitudinal direction of the displacement limiting stopper 141 and the inner core 140 fixedly coupled with the rubber 130. Hydroelectric transmission mount, characterized in that further comprises a plate-separation prevention plate 142 is fixedly coupled to).
The method of claim 1,
Each of the inner ring 110 and the orifice assembly 120 has a cylindrical shape in which both ends thereof are partially cut to form a cylindrical shape according to the combination of the inner ring 110 and the orifice assembly 120. A plurality of protrusions 113 protruding outward are formed at both ends of the ring 110, and a plurality of coupling holes 123 are formed at both ends of the orifice assembly 120 to penetrate through the thickness of the protrusions 113. ) And the coupling hole 123 is fitted to each other, characterized in that the hydro transmission mount.
The method of claim 1,
The height of the rubber 130 is formed to be relatively larger than the diameter of the inner ring 110, so that when the inner ring 110 and the orifice assembly 120 is coupled, the rubber 130 is the orifice assembly 120 A hydro transmission mount, characterized in that it is made in contact with the inner surface of the) to maintain a compressed state.

Images