KR20180068739A - Variable stiffness roll mount device and method thereof - Google Patents

Abstract

The present invention relates to a roll mount device and an operation method thereof, and more specifically, to a roll mount device and an operation method. By using the present invention, stiffness of an insulator of a roll mount device is variably changed so as to adjust a resonance frequency of a rod such that booming for each gear can be avoided.

Description

TECHNICAL FIELD [0001] The present invention relates to a rigid variable roll mount apparatus and a method of operating the same.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roll mount apparatus and a method of operating the same, and more particularly, to a roll mount apparatus and a method of operating the same, which variably change an insulator stiffness of a roll mount apparatus to adjust a resonance frequency of a rod, And a method of operating the roll mount apparatus.

Generally, there are an inertial support system, a center support system, and a composite support system in general for supporting the power train of a vehicle. At present, inertial support systems having a relatively high IDLE performance are widely used. The inertial support systems are classified into a four-point support system and a three-point support system depending on the number of mountings.

In the four-point support system, the engine mount and the transmission mount are located on the upper or side surface of the side member of the vehicle body, and the front and rear roll stoppers are mounted on the sub frame.

1, the engine mount 4, which is formed on one side of the engine 2, and the transmission mount 8, which is formed on one side of the transmission 6, And the roll mount 10 is mounted on the sub frame 12 or the cross member in place of the front and rear roll stoppers.

The roll mount 10 mainly serves to control the roll behavior of the power train and the engine mount 4 and the transmission mount 8 mainly have a bounce (bounce) or pitching (pitching).

In recent years, most of high-torque engines of heavy / heavy vehicles have been adopted by adopting the inertia three-point support system, and since the I-type subframe type is widely adopted for the weight saving of the vehicle, And the roll mount 10 used in the three-point supporting method is fixed to the power train and the other side is fixed to the sub-frame 12 .

The power train (P / T) means a series of all devices that transmit power generated by an engine such as a mission, a clutch, a transmission, a longitudinal speed reduction device to a driving wheel, So that the vibration is primarily reduced.

2 has a rod 14, a front insulator 16 and a rear insulator 18. The rear insulator 18 is provided with two rear insulators 18 The end plate 20 and the front insulator 16 are positioned to face each other between the rod 14 and the end plate 20. The end plate 20 is fixed to the end plate 20 by a through bolt 22 passing through the center of the end plate 20 and the front insulator 16. [ And the rear insulator 18 are fixed to the rod 14 and the body bracket 24 is connected between the rear insulators 18 to fix the roll mount 10 to the sub frame 12 of the vehicle body .

In the above conventional roll mount apparatus, the mounting device operates with the stiffness value of the designed insulators 16 and 18. However, since the roll mount resonance frequency is changed in accordance with the change of the gear position of the vehicle, it is difficult to secure the reliability of acceleration booming. In addition, when the mass of the roll mount is small, the resonance frequency changing band becomes wider, and it becomes very difficult to control the roll mount behavior.

Therefore, since the conventional roll mount apparatus is vulnerable to shocks and vibrations due to power train roll vibration on a large displacement, the insulation performance of vibration and noise transmitted to the vehicle body is entirely deteriorated, And the vibration and noise generated in the vehicle can not be effectively damped. As a result, the driver is dissatisfied with the vibration of the handle, the floor and the seat transmitted to the driver, and the durability of the vehicle is weakened and the quality is deteriorated .

Korean Patent Registration No. 10-1316827

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a roll mount device in which the resonator frequency of a rod can be adjusted by varying rigidity of an insulator of a roll mount device, .

In order to achieve the above object, in the rigid variable roll mount apparatus of the present invention,

The bolt hole is inserted into the bolt hole, and the nut is fastened to the lower end of the bolt passing through the first rear insulator, the body bracket, and the second rear insulator,

And the rigidity of the roll mount device is varied by changing the compression force of the first rear insulator and the second rear insulator by adjusting the loosening and tightening of the nut with respect to the bolt.

And an active module having a nut formed therein is located at the rear end of the second rear insulator.

In the active module,

A cup-shaped housing;

A controller configured on a bottom surface of the housing;

A laser displacement sensor configured on the bottom surface of the housing and sensing a change in position of the lower end of the bolt;

A motor driven and controlled by a controller;

And a gear rotated by the motor.

And the nut is a pinion gear having a saw tooth shape on the outer diameter surface so as to be able to rotate in engagement with the gear.

And the rotational force is transmitted to the nut while the gear rotates by driving the motor.

The length of the bolt inserted into the active module changes according to the rotation direction of the nut, so that the compressive force applied to the first and second rear insulators is changed.

And a plurality of motors are formed.

And the plurality of motors rotate in the same direction.

According to another aspect of the present invention, there is provided a method of operating a rigid variable roll mount apparatus,

The current RPM and gear rank information of the driving vehicle being sensed by the controller;

The current bolt position value of the vehicle being driven is sensed by the laser displacement sensor;

Retrieving a target bolt position value according to sensed RPM and gear rank information;

Comparing a difference between a current bolt position value and a target bolt position value;

And rotating the nut by driving the motor according to the result of the comparing step.

If the value obtained by subtracting the target bolt position value from the current bolt position value is smaller than 0 in the step of comparing the difference between the current bolt position value and the target bolt position value,

In the step of rotating the nut, the motor is rotated in the first direction by a value obtained by subtracting the target bolt position value from the current bolt position value.

If the value obtained by subtracting the target bolt position value from the current bolt position value is greater than 0 in the step of comparing the difference between the current bolt position value and the target bolt position value,

In the step of rotating the nut, the motor is rotated in the second direction by a value obtained by subtracting the target bolt position value from the current bolt position value.

When the difference between the current bolt position value and the target bolt position value is '0' obtained by subtracting the target bolt position value from the current bolt position value, the step of rotating the nut does not proceed.

And the target bolt position value is a value preset according to the RPM and the number of gear stages.

According to the present invention, the resonator frequency of the rod can be adjusted by varying the rigidity of the insulator of the roll mount device, thereby avoiding booming according to the number of gear stages.

Therefore, since the vibration absorbing property is superior to that of the conventional roll rod, the vibration damping effect can be improved even at various frequencies and displacements, so that complaints about handle, floor and seat vibration due to excitation of the driver can be reduced, It is possible to make a great contribution to the improvement of the quality problem of the vehicle.

1 is a schematic view of a power train and a subframe showing a conventional three-point support system.
2 is a conceptual view of a conventional roll-mounted device.
3 is a conceptual view of a roll mount device according to the present invention.
4 is a detailed view of a bolt fastening direction of the roll mount apparatus according to the present invention.
5 is a detailed view of an active module of a roll mount apparatus according to the present invention.
6 is an operational logic of the roll mount apparatus according to the present invention.
Figure 7 shows the comparison of the operating logic according to the invention.
8 is a table of exemplary bolt target position values of the roll mount operation logic according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that the same components are denoted by the same reference numerals in the drawings. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

The present invention relates to a roll mount apparatus and a method of operating the same, in which the resonance frequency of a rod can be adjusted by varying rigidity of an insulator of a roll mount apparatus to avoid booming by the number of gear stages.

FIG. 3 is a conceptual view of a roll mount device according to the present invention. FIG. 4 is a detailed view of the bolt fastening direction of the roll mount device according to the present invention. Figure 6 shows the operating logic of the roll-mounted device according to the invention, Figure 7 shows the comparison of the operating logic according to the invention, Figure 8 shows the roll- And a bolt target position value example table of the mount device operation logic.

The roll mount apparatus of the present invention includes a first rear insulator 50 disposed on the front side of a body bracket 48 fixed to a subframe and a second rear insulator 52 disposed on a rear side of the body bracket 48. [ A bolt hole 32 through which a bolt 34 of a predetermined length can be inserted is formed in the rod 30, and the bolt hole 32 is formed in the rod 30, And the active module 38 is coupled to the rear end of the main body 52.

When the rod 30, the body bracket 48, the first rear insulator 50 and the second rear insulator 52 are coupled by the bolts 34, The lower end of the bolt 34 may be connected to the second rear insulator 52, the body bracket 48, and the second rear insulator 52 so that the bolt 34 may be positioned closer to the second rear insulator 52 than the first rear insulator 50, The rod 30, the body bracket 48, the first rear insulator 50 and the second rear insulator 52 are inserted in the order of the first rear insulator 50 and the rod 30, .

However, in the roll mount apparatus of the present invention, when the rod 30, the body bracket 48, the first rear insulator 50, and the second rear insulator 52 are engaged by the bolts 34, The bolt 34 is inserted into the bolt hole 32 of the rod 30 so that the head of the rod 34 can be positioned closer to the first rear insulator 52 side than the side of the second rear insulator 52 The body bracket 48 and the first rear insulator 52 are sequentially inserted in the order of the first rear insulator 50, the body bracket 48 and the second rear insulator 52 in this order. 50) and the second rear insulator (52).

A nut (36) is fastened to the lower end of the bolt (34) passing through the second rear insulator (52).

The roll mount apparatus of the present invention adjusts the releasing and tightening of the nut 36 with respect to the bolt 34 to change the compressive force of the first rear insulator 50 and the second rear insulator 52, The structure for adjusting the tightening of the nut 36 with respect to the bolt 34 is as follows.

The lower end of the bolt 34 is inserted into the active module 38 for a predetermined length so that the nut 36 fastened to the lower end of the bolt 34 is also located inside the active module 38 do.

The active module 38 includes a cup-shaped housing 40, a controller 42 disposed on the bottom surface of the housing 40, and a controller 40 disposed on the bottom surface of the housing 40, A motor 44 which is arranged inside the housing 40 and is controlled and driven by the controller 42 and which is driven by the motor 40 And a gear 46 that is rotated by the gears 44 and 44.

The nut 36 is engaged with the gear 46 and rotated so that the nut 36 rotates in engagement with the gear 46. The nut 36 has a saw- a pinion gear is used.

When certain information is received in the controller 42, the controller 42 drives the motor 44 according to the predetermined information.

The gear 46 is rotated by the driving of the motor 44 to transmit the rotational force to the nut 36.

The length of the lower end of the bolt 34 inserted into the active module 38 is changed according to the rotation direction of the nut 36 so that the compressive force applied to the first and second rear insulators 50 and 52 is changed do.

When the nut 36 is moved toward the upper end of the bolt 34 while rotating in the tightening direction, the lower end of the bolt 34 inserted into the housing 40 of the active module 38, And the compressive force applied to the first and second rear insulators 50 and 52 gradually increases.

The length of the lower end of the bolt 34 inserted into the housing 40 of the active module 38 becomes shorter as the nut 36 rotates in the unwinding direction and moves toward the lower end of the bolt 34 And the compressive force applied to the first and second rear insulators 50 and 52 becomes smaller.

As described above, the rigidity of the roll mount device is changed as the compressive force applied to the first and second rear insulators 50 and 52 is changed.

The number of the motors 44 may be changed. However, the number of the motors 44 may be changed only by the number of gears (not shown) The number of the motors 44 is configured so that the gears 46 can transmit a uniform rotational force to the circumferential direction of the nuts 36 when the gears 46 transmit rotational force to the nuts 36. When a plurality of motors 44 are formed, the motors 44 rotate in the same direction.

Further, the position of the motor 44 may be changed to a side surface or the like other than the bottom surface of the housing 40.

In the roll mount apparatus of the present invention configured as described above,

The current RPM and gear rank information of the driving vehicle is sensed by the controller 42 (S100)

(S110) the current bolt position value of the driving vehicle is sensed by the laser displacement sensor 54,

(S120) a target bolt position value according to the sensed RPM and gear rank information from the controller (42)

Comparing a difference between the current bolt position value and the target bolt position value;

Driving the motor (44) to rotate the nut (36) according to the result of the comparing step (S140)

Lt; / RTI >

When the operation logic of the roll mount apparatus according to the present invention is started, the current RPM of the driven vehicle, the current gear rank information is sensed by the controller (42). (S100)

When the current RPM of the vehicle and the current gear number information are sensed in the controller 42 in step S100, the laser displacement sensor 54 senses the current bolt position value of the driving vehicle in step S110. The target bolt position value is retrieved according to the sensed current RPM and the current gear rank information (S120)

The target bolt position value is a predetermined value according to the RPM and the number of gears, and becomes the target position value at which the lower end of the bolt should be positioned according to the RPM and the number of gears of the vehicle.

8 shows an exemplary table of bolt target position values preset according to the RPM of the vehicle and the number of gears.

Then, the controller 42 compares the difference between the current bolt position value and the target bolt position value (S 130)

If the value obtained by subtracting the target bolt position value from the current bolt position value is less than 0 in the step of comparing the difference between the current bolt position value and the target bolt position value, The motor 44 is rotated in the first direction, for example, the bolt 34 with the nut 36 (see FIG. 4) by converting the current bolt position value to the absolute value by subtracting the target bolt position value from the current bolt position value (S140). In this case,

The length of the lower end of the bolt 34 inserted into the housing 40 of the active module 38 becomes shorter when the nut 36 rotates in the unwinding direction with respect to the bolt 34, 2 The compressive force applied to the rear insulators 50, 52 decreases, and the rigidity of the roll mount device is lowered.

If the value obtained by subtracting the target bolt position value from the current bolt position value is greater than 0 in the step of comparing the difference between the current bolt position value and the target bolt position value (S130), the nut 36 is rotated In step S140, the motor is rotated in a second direction, for example, the bolt 34 with respect to the bolt 34 by converting the current bolt position value to an absolute value by subtracting the target bolt position value. Direction. (S140)

The length of the lower end of the bolt 34 inserted into the housing 40 of the active module 38 becomes longer when the nut 36 is rotated in the tightening direction with respect to the bolt 34, 2 The compressive force applied to the rear insulators 50, 52 increases, and the rigidity of the roll mount device is increased.

If the value obtained by subtracting the target bolt position value from the current bolt position value is '0' in the step of comparing the difference between the current bolt position value and the target bolt position value (S130), the nut 36 is rotated The step is not advanced, and the operation logic is terminated.

After a certain period of time after the end of the operating logic, the step of sensing the current RPM and gear rank information of the driving vehicle is re-advanced to restart the operating logic.

The roll-mounted device of the present invention operated as described above can vary the rigidity of the first and second rear insulators to adjust the resonance frequency of the rod, thereby avoiding booming by the number of gear stages .

Accordingly, since the vibration absorbing property is superior to that of the conventional rod, the vibration damping effect can be improved even at various frequencies and displacements, so that complaints about handle, floor and seat vibration due to excitation of the driver can be reduced , IQS, and other vehicle quality problems.

The embodiments of the rigid variable roll mount apparatus and method of operation of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent other embodiments You can see that it is possible. It is therefore to be understood that the invention is not limited to the form set forth in the foregoing description. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

2: Conventional engine
4: Conventional engine mount
6: Conventional transmission
8: Conventional transmission mount
10: Conventional roll mount
12: Conventional subframe
14: Conventional roll rod
16: Conventional front insulator
18: Conventional rear insulator
20: Conventional end plate
22: Conventional through bolt
24: Conventional body bracket
30: Load
32: Bolt hole
34: Bolt
36: Nuts
38: Active module
40: Housing
42:
44: Motor
46: gear
48: Body Bracket
50: first rear insulator
52: Second rear insulator
54: Laser displacement sensor
S100: The step in which the current RPM and gear stage information of the driving vehicle is sensed by the controller
S110: the current bolt position value of the driving vehicle is sensed by the laser displacement sensor
S120: bringing the target bolt position value according to the sensed RPM and gear rank information
S130: comparing the difference between the current bolt position value and the target bolt position value
S140: driving the motor to rotate the nut according to the resultant value in the comparing step

Claims (13)

A first rear insulator disposed on a front side of a body bracket fixed to a subframe and a second rear insulator disposed on a rear side of the body bracket are coupled to a rear end of a rod connected to the power train,
The bolt is inserted into the bolt hole, and the nut is fastened to the lower end of the bolt passing through the first rear insulator, the body bracket, and the second rear insulator in order. ,
And varying the rigidity of the roll mount device by adjusting the unclamping and tightening of the nut with respect to the bolt to change the compressive force of the first and second rear insulators and the second rear insulator
Wherein the rigid variable roll-mounted device is characterized in that: The method according to claim 1,
Wherein an active module having the nut is disposed at a rear end of the second rear insulator. 3. The method of claim 2,
The active module includes:
A cup-shaped housing;
A controller configured on a bottom surface of the housing;
A laser displacement sensor disposed on a bottom surface of the housing for sensing a change in position of a lower end of the bolt;
A motor controlled and driven by the controller;
A gear rotated by the motor;
Wherein the stiffness variable roll-mount device comprises: The method of claim 3,
Wherein the nut is a pinion gear having a saw tooth shape on an outer diameter surface so as to be engaged with the gear and rotate. The method of claim 3,
And the rotation force is transmitted to the nut while the gear rotates by driving the motor. 6. The method of claim 5,
Wherein a length of the bolt inserted into the active module is changed according to a rotation direction of the nut to change the compressive force applied to the first and second rear insulators. The method of claim 3,
And a plurality of the motors are formed. 8. The method of claim 7,
Wherein the plurality of motors rotate in the same direction with respect to each other. A method of operating a roll mount apparatus according to any one of claims 1 to 8,
The current RPM and gear rank information of the driving vehicle being sensed by the controller;
The current bolt position value of the driving vehicle is sensed by the laser displacement sensor;
Retrieving a target bolt position value according to sensed RPM and gear rank information;
Comparing a difference between the current bolt position value and the target bolt position value;
Rotating the nut by driving the motor according to the result of the comparison;
Wherein the step of moving the rigid adjustable roll-mounted device comprises advancing the rigid variable roll-mounted device. 10. The method of claim 9,
If the value obtained by subtracting the target bolt position value from the current bolt position value is less than 0 in the step of comparing the difference between the current bolt position value and the target bolt position value,
Rotating the motor in the first direction by a value obtained by subtracting the target bolt position value from the current bolt position value in the step of rotating the nut
Wherein the step of moving the rigid variable roll-mounted device comprises the steps of: 10. The method of claim 9,
If the value obtained by subtracting the target bolt position value from the current bolt position value is greater than 0 in the step of comparing the difference between the current bolt position value and the target bolt position value,
Rotating the motor in the second direction by a value obtained by subtracting the target bolt position value from the current bolt position value in the step of rotating the nut
Wherein the step of moving the rigid variable roll-mounted device comprises the steps of: 10. The method of claim 9,
If the value obtained by subtracting the target bolt position value from the current bolt position value is '0' in the step of comparing the difference between the current bolt position value and the target bolt position value, the step of rotating the nut does not proceed
Wherein the step of moving the rigid variable roll-mounted device comprises the steps of: 10. The method of claim 9,
Wherein the target bolt position value is a value preset according to the RPM and the number of gear stages.

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