KR102540443B1 - Large size commercial vehicle for bumper unit - Google Patents

Abstract

A bumper unit for a large commercial vehicle is disclosed. A bumper unit for a large commercial vehicle according to an exemplary embodiment of the present disclosure includes: i) a fixed bumper beam fastened to both front sides of a side member of a vehicle body through fixed stays, and a fixed bumper cover installed in front of the fixed bumper beam. ii) a variable bumper beam installed to be linearly movable in the vertical direction through variable stays on both sides of the front side of the side member at the lower side of the fixed bumper beam, and a variable bumper cover installed in front of the variable bumper beam. and iii) a driving unit installed on the side member to be connected to the variable stay and converting the rotational driving force of the motor into vertical linear motion of the variable stay.

Description

Large commercial vehicle bumper unit {LARGE SIZE COMMERCIAL VEHICLE FOR BUMPER UNIT}

An embodiment of the present invention relates to a front structure of a large commercial vehicle, and more particularly, to a front bumper structure installed on the front side of a large commercial vehicle such as a large truck or a large bus.

In general, a bumper unit in a vehicle is a buffer unit installed on the front and rear of the vehicle body to promote the safety of passengers by absorbing the impact when the vehicle collides with another vehicle or a fixture, and at the same time to minimize deformation of the vehicle body. am.

In this bumper unit, bumper beams disposed in the vehicle width direction at the front and rear of the vehicle are mounted on side members on the body side through stays, an energy absorber for absorbing impact force is disposed in front of the bumper beam, and a bumper cover is provided with the bumper beam and energy absorber. It is installed while wrapping the absorber.

On the other hand, large commercial vehicles such as large trucks and buses, unlike ordinary passenger cars, have a large body and tire size according to the increase in loading capacity, and the height of the bumper and main frame of large commercial vehicles due to the approach angle from the front of the vehicle. is located at a higher place than general passenger cars, and in particular, in the case of construction machinery vehicles (dumpers, mixers, etc.) that drive a lot on rough roads, the height of the bumper is relatively higher than that of other vehicles due to the entry angle restriction.

As a result, in the event of a collision between a large commercial vehicle and a general passenger car, an under-run phenomenon occurs in which the front part of the passenger car flows into the lower part of the bumper of the large commercial vehicle, resulting in many casualties and property damage. more damage is occurring. In addition, due to the location of the bumper of a large commercial vehicle, the amount of air introduced under the bumper increases, resulting in poor aerodynamic performance and deterioration of fuel efficiency.

In Europe, FUPD (Forward Intrusion Prevention Device) regulation ECE R93 has been enacted for large trucks to prevent under-run, but most countries except Europe have not yet introduced FUPD regulation.

Matters described in this background art section are prepared to enhance understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art to which this technique belongs.

Embodiments of the present invention are intended to provide a bumper unit for a large commercial vehicle capable of preventing an under-run phenomenon in which the passenger car enters under the front bumper of the large commercial vehicle when the large commercial vehicle collides with the passenger car.

In addition, embodiments of the present invention provide a bumper unit for a large commercial vehicle capable of improving aerodynamic performance and fuel efficiency of a vehicle by reducing the amount of air introduced under the front bumper.

A bumper unit for a large commercial vehicle according to an embodiment of the present invention includes: i) a fixed bumper beam fastened to both front sides of a side member of a vehicle body through fixed stays, and a fixed bumper cover installed in front of the fixed bumper beam. A bumper; ii) a variable bumper beam installed to be linearly movable in the vertical direction through variable stays on both sides of the front side of the side member at the lower side of the fixed bumper beam, and a variable bumper cover installed in front of the variable bumper beam and iii) a drive unit installed on the side member to be connected to the variable stay and converting rotational driving force of a motor into vertical linear motion of the variable stay.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, the variable bumper linearly moves the variable bumper beam in an upward direction through the variable stay by driving the driving unit, and the variable bumper cover is It can be overlapped and connected from the inside with the fixed bumper cover.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, the variable bumper linearly moves the variable bumper beam in a downward direction through the variable stay by driving the driving unit, and the variable bumper cover is It can be connected at the bottom and outside of the fixed bumper cover.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, the variable stay is integrally connected to a first part penetrating the side member in a vertical direction, and is integrally connected to the first part and disposed toward the front side, A second part connected to the variable bumper beam may be included.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, a stay guide for guiding the first part in a vertical direction may be installed inside the side member.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, the driving unit is coupled with a rack member installed to be fixed in the vertical direction to the variable stay, and rotates by receiving the driving force of the motor engaged with the rack member A gear member may be included.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, the gear member may include a pinion gear connected to the motor.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, the gear member may include a worm gear connected to the motor.

In addition, in the bumper unit for a large commercial vehicle according to an embodiment of the present invention, the variable bumper cover may include an air dam unit for guiding air upward.

In addition, the bumper unit for a large commercial vehicle according to an embodiment of the present invention may further include a controller for controlling the driving unit according to driving conditions of the vehicle.

Embodiments of the present invention can reduce damage to the passenger car and injury to passengers by preventing the under-run phenomenon in the event of a collision between a large commercial vehicle and a passenger car, and reduce the amount of air introduced into the lower part of the vehicle to improve the aerodynamic performance and fuel efficiency of the vehicle. can improve

In addition, effects that can be obtained or predicted due to the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, various effects expected according to an embodiment of the present invention will be disclosed within the detailed description to be described later.

Since these drawings are for reference in explaining exemplary embodiments of the present invention, the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a view schematically showing a bumper unit for a large commercial vehicle according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing the configuration of a bumper unit for a large commercial vehicle according to an embodiment of the present invention.
3 (a) and (b) are diagrams illustrating examples of a driving unit applied to a bumper unit for a large commercial vehicle according to an embodiment of the present invention.
4 is a view for explaining the operation of the bumper unit for a large commercial vehicle according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to what is shown in the drawings, and the thickness is enlarged to clearly express various parts and regions.

And, in the following detailed description, the names of the components are divided into first, second, etc. to classify them based on the relationship in which the components are the same, and the order is not necessarily limited in the following description.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

In addition, terms such as "...unit" and ""...means" described in the specification mean a comprehensive unit that performs at least one function or operation.

1 is a view schematically showing a bumper unit for a large commercial vehicle according to an embodiment of the present invention.

Referring to FIG. 1 , the bumper unit 100 for a large commercial vehicle according to an embodiment of the present invention may be applied to a front structure of a large commercial vehicle such as a large truck, a large bus, or a large construction machine vehicle.

For example, the bumper unit 100 for a large commercial vehicle according to an embodiment of the present invention is configured on the front side of a large commercial vehicle and is a front bumper structure capable of absorbing impact when colliding with another vehicle or a fixture. can be applied to

In an embodiment of the present invention, the longitudinal direction (T direction) of the vehicle body is defined as the front-rear direction, the left-right direction (L direction) of the vehicle body is defined as the width direction, and the height direction (H direction) of the vehicle body is defined as the vertical direction. , the upper part is defined as the upper part, the upper part, the upper part and the upper surface, and the lower part is defined as the lower part, lower part, lower part and lower surface.

Furthermore, "end (one/one end or other/one end)" in the following may be defined as either end, and a certain portion including the end (one/one end or the other/one end) ) can also be defined.

The bumper unit 100 for a large commercial vehicle according to an embodiment of the present invention has a structure capable of preventing an under-run phenomenon in which a passenger car enters under a front bumper of a large commercial vehicle when a large commercial vehicle collides with a passenger car.

In addition, an embodiment of the present invention provides a bumper unit 100 for a large commercial vehicle capable of improving aerodynamic performance and fuel efficiency of a vehicle by reducing the amount of air introduced under the front bumper.

To this end, the bumper unit 100 for a large commercial vehicle according to an embodiment of the present invention basically includes a fixed bumper 10, a variable bumper 30, a driving unit 50, and a controller 70, which constitutes Each is explained as follows.

2 is a cross-sectional view schematically showing the configuration of a bumper unit for a large commercial vehicle according to an embodiment of the present invention.

1 and 2, in the embodiment of the present invention, the fixed bumper 10 is a fixed bumper beam 13 fastened to both front sides of the side member 3 of the vehicle body 1 through fixed stays 11 and a fixed bumper cover 15 installed in front of the fixed bumper beam 13.

The fixing stay 11 is also called a crash box in the art, and is fixedly installed on both sides of the front side member 3. The fixed bumper beam 13 is provided in the shape of a closed cross section or open cross section for securing crash performance and reinforcing rigidity, and is mutually fastened (joined) with the fixed stay 11 .

In addition, the fixed bumper cover 15 is a cover body surrounding the fixed bumper beam 13 from the front, and may be provided in a shape extending a predetermined length downward from the fixed bumper beam 13, for example.

In the embodiment of the present invention, the variable bumper 30 is installed to be linearly movable in the vertical direction through the variable stay 31 on both sides of the front side of the side member 3 at the lower side of the fixed bumper beam 13. A bumper beam 33 and a variable bumper cover 35 installed in front of the variable bumper beam 33 are included.

The variable stay 31 is installed to be able to linearly reciprocate in the vertical direction on the side member 3 through a driving unit 50 to be described later, and a variable bumper beam 33 is provided at the front end of the variable stay 31. ) is fastened (joined).

The variable bumper beam 33 is provided in the shape of a closed or open cross section for crash performance and rigidity reinforcement, and is fixedly installed at the front end of the variable stay 31 .

Also, the variable bumper cover 35 is a cover body that surrounds the variable bumper beam 33 from the front, and may be provided in a shape extending a certain length to the lower side of the variable bumper beam 33, for example.

Here, the variable stay 31 is provided in a substantially “L” shape, the first part 41 penetrating the side member 3 in the vertical direction, and the first part 41 integrally connected to the first part 41. It consists of two parts (42).

The first part 41 is a part passing through the lower and upper surfaces of the side member 3, and is inserted into the stay guide 45 provided inside the side member 3 in the vertical direction, and the stay guide It can be guided and moved in the vertical direction through (45). The second part 42 is a part connected from the lower end of the first part 41 to the front side, and is connected to the variable bumper beam 33 at the front end.

Furthermore, the variable bumper cover 35 of the variable bumper 30 forms an air dam portion 47 as an air guide for guiding air introduced into the lower side of the fixed bumper 10 upward.

On the other hand, the variable bumper beam 33 of the variable bumper 30 as described above is a vertical linear movement of the variable stay 31, and as shown in the drawing, the fixed bumper beam 13 inside the fixed bumper cover 15 ) may be located on the lower side of

Alternatively, although not shown in the drawing, the variable bumper beam 33 may be positioned between the fixed stays 11 on both sides of the inner side of the fixed bumper cover 15 by the vertical linear movement of the variable stay 31. there is.

In the embodiment of the present invention, the drive unit 50 converts the rotational driving force of the motor 51 into the vertical linear reciprocating motion of the variable stay 31, so that the side member 3 is connected to the variable stay 31. installed As shown in FIG. 3, the drive unit 50 includes a rack member 53 and a gear member 55.

The rack member 53 has a bar shape and is installed to be fixed to the first part 41 of the variable stay 31 in the vertical direction. A spur gear train is formed along the vertical direction in the rack member 53 .

In addition, the gear member 55 rotates by receiving the driving force of the motor 51, and is meshed with the gear train of the rack member 53. Here, the motor 51 is fixedly installed on the side member 3, and a gear member 55 is connected to a drive shaft of the motor 51.

As an example, the gear member 55 as described above is connected to the motor 51, as shown in (a) of FIG. 3, and may include a pinion gear 57 engaged with the rack member 53. can As another example, the gear member 55 may include a worm gear 59 connected to the motor 51 and engaged with the rack member 53, as shown in FIG. 3(b).

In an embodiment of the present invention, the controller 70 is a controller that controls the overall operation of the driving unit 50, and may be implemented as one or more control processors that operate according to a set program. It can contain a series of commands to carry out the following contents.

The controller 70 controls driving of the motor 51 according to vehicle driving conditions, such as vehicle speed detected by a vehicle speed sensor and rough road conditions detected by a road surface sensor, The height of the variable bumper 30 can be adjusted.

Hereinafter, the operation of the bumper unit 100 for a large commercial vehicle according to an embodiment of the present invention configured as above will be described in detail with reference to the previously disclosed drawings and accompanying drawings.

4 is a view for explaining the operation of the bumper unit for a large commercial vehicle according to an embodiment of the present invention.

First, in the embodiment of the present invention, as shown in FIG. 2, in the driving condition of driving on a low-speed rough road, the variable bumper beam 33 is moved upward through the variable stay 31 by driving the driving unit 50. While moving in a straight line, the variable bumper cover 35 maintains an overlapping state inside the fixed bumper cover 15.

On the other hand, in the driving condition of a vehicle traveling at high speed on a road other than a rough road in this state, in the embodiment of the present invention, as shown in FIG. Apply a driving control signal.

Then, the gear member 55 of the drive unit 50 is rotated in one direction by driving the motor 51, and the variable stay 31 is maintained by the rack member 53 meshed with the gear member 55. move in an upward direction.

Here, the first part 41 of the variable stay 31 is guided in the vertical direction through the stay guide 45 of the side member 3, and accordingly, the variable bumper beam 33 moves the variable bumper cover 35 ) and moves upward.

Therefore, in the embodiment of the present invention, the variable bumper beam 33 is linearly moved downward through the variable stay 31 by driving the driving unit 50 as described above, and the variable bumper cover 35 is fixed to the bumper cover ( 15) can be connected from the bottom and outside.

Thus, in the embodiment of the present invention, when the large commercial vehicle is traveling at high speed, the variable bumper 30 is moved downward with respect to the fixed bumper 10, so that when the large commercial vehicle collides with the passenger car, the passenger car moves to the lower part of the vehicle. Under-run phenomenon can be prevented.

In addition, in the embodiment of the present invention, as the variable bumper 30 is moved downward with respect to the fixed bumper 10, the air introduced to the lower side of the fixed bumper 10 during vehicle driving is moved to the variable bumper cover 35. is guided upward through the air dam unit 47, and the amount of air introduced into the lower part of the vehicle can be reduced.

Furthermore, in the embodiment of the present invention, as it has a structure for linearly moving the variable bumper 30 in the vertical direction with respect to the fixed bumper 10, a conventional technique for turning the variable bumper in the vertical direction through a link structure or the like In comparison, since interference with peripheral parts can be avoided, it is advantageous in terms of actual vehicle application.

Furthermore, in the embodiment of the present invention, as the variable bumper 30 has a structure for linearly moving the variable bumper 30 in the vertical direction with respect to the fixed bumper 10, a conventional technique of turning the variable bumper in the vertical direction through a link structure or the like In comparison, since it is possible to avoid the gap between the fixed bumper 10 and the variable bumper 30, it is advantageous in terms of design and aerodynamic performance.

On the other hand, in the embodiment of the present invention, when an active safety device such as a forward collision avoidance assist (FCA) is operated, a collision with a passenger car may occur because complete braking of a large commercial vehicle is not performed.

Therefore, in the embodiment of the present invention, by controlling the movement of the variable bumper 30 in the lower direction through the controller 70 in conjunction with the active safety device, mutual safety and reduction of vehicle repair costs in the event of a collision between a large commercial vehicle and a passenger car can promote

According to the bumper unit 100 for a large commercial vehicle according to an embodiment of the present invention as described so far, when a large commercial vehicle and a passenger car collide, an under-run phenomenon can be prevented to reduce damage to the passenger car and damage to passengers, , It is possible to improve the aerodynamic performance and fuel efficiency of the vehicle by reducing the amount of air introduced into the lower part of the vehicle.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and it is possible to carry out various modifications within the scope of the claims and detailed description of the invention and the accompanying drawings, and this is also the present invention. It goes without saying that it falls within the scope of the invention.

1: body 3: side member
10: fixed bumper 11: fixed stay
13: fixed bumper beam 15: fixed bumper cover
30: variable bumper 31: variable stay
33: variable bumper beam 35: variable bumper cover
41 first part 42 second part
45: stay guide 47: air dam part
50: driving unit 51: motor
53: rack member 55: gear member
57: pinion gear 59: worm gear
70: controller 100: bumper unit

Claims (9)

A fixed bumper including a fixed bumper beam fastened to both sides of the front side member of the vehicle body through fixed stays and a fixed bumper cover installed in front of the fixed bumper beam;
A variable bumper including a variable bumper beam installed to be linearly movable in an up and down direction through variable stays on both sides of the front side of the side member at the lower side of the fixed bumper beam, and a variable bumper cover installed in front of the variable bumper beam; and
A drive unit installed on the side member to be connected to the variable stay and converting the rotational driving force of the motor into vertical linear motion of the variable stay;
The variable bumper cover is a bumper unit for a large commercial vehicle including an air dam unit for inducing air in an upward direction. According to claim 1,
The variable bumper,
The drive of the drive unit linearly moves the variable bumper beam in an upward direction through the variable stay, and the variable bumper cover overlaps the fixed bumper cover on the inside,
A bumper unit for a large commercial vehicle in which the variable bumper beam is linearly moved downward through the variable stay by driving of the driving unit, and the variable bumper cover is connected to the lower end of the fixed bumper cover from the outside. According to claim 1,
The variable stay,
A first part penetrating the side member in the vertical direction;
A second part integrally connected to the first part and disposed toward the front side and connected to the variable bumper beam
Bumper unit for large commercial vehicles comprising a. According to claim 3,
A bumper unit for a large commercial vehicle in which a stay guide for guiding the first part in a vertical direction is installed inside the side member. According to claim 1,
the driving unit,
A rack member installed to be fixed in the vertical direction to the variable stay;
A gear member that is engaged with the rack member and rotates by receiving the driving force of the motor
Bumper unit for large commercial vehicles comprising a. According to claim 5,
The gear member,
Bumper unit for a large commercial vehicle comprising a pinion gear connected to the motor. According to claim 5,
The gear member,
A bumper unit for a large commercial vehicle comprising a worm gear connected to the motor. delete According to claim 1,
Bumper unit for a large commercial vehicle further comprising a controller for controlling the driving unit according to driving conditions of the vehicle.

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