KR100482095B1 - Weight center variable system in small type truck - Google Patents

Abstract

The present invention relates to a center-of-gravity moving device of a small truck, and according to the amount of cargo loaded in the cargo loading unit to the torsion bar toward the rear of the vehicle to move the vehicle center of gravity to the rear of the vehicle, evenly loads according to the cargo loading In addition to dispersing and supporting, it aims to prevent excessive body behavior and impact on rolling and side members due to rough road passage.

The present invention for achieving the above object, the torsion bar (T) leading to the rear portion along the side member (1) of the vehicle equipped with axle suspension of the front wheel (FW) is the rear portion of the side member (1) According to the amount of cargo loaded in the cargo loading section (D) is controlled by a variable device for drawing out to the rear of the vehicle, the variable device is a sensor for measuring the load of the cargo loading section (11, 11) Controller 10 that receives signals from the speed sensor 12 for detecting the speed of the vehicle and processes and judges the program according to the built-in program, and is driven according to the control signal of the controller 10 while being driven together with the operation of the engine. It is characterized in that it comprises a drive means 20 for controlling the path of the hydraulic pressure and the moving means (30,30 ') for drawing the torsion bar (T) to the rear of the vehicle through the hydraulic pressure supplied from the drive means 20 .

Description

Weight center variable system in small type truck}

The present invention relates to a center-of-gravity moving device of a small truck, and more particularly, to a center of gravity of a small truck to distribute and support the weight of the cargo loaded on the deck using a torsion bar to prevent the load bias of the body frame. Relates to a device.

In general, a commercial vehicle including a one-ton truck is not only relatively heavy, but also uses a frame made of H-shape such as rectangular steel to maintain the body strength because the vehicle loads the cargo. Formed in a straight line as described above and arranged in parallel with each other is made of a side member (1) provided with a cross member (2) to improve the rigidity while maintaining the H shape across therebetween.

In addition, the side member 1 supports the driver's seat C provided with the front wheels FW through the front axle FA of the vehicle, and the rear wheels FW are provided through the rear axle RA. Of course, the cargo loading portion (D) for supporting the cargo loaded on the deck is mounted to form a skeleton of the basic vehicle to substantially secure the strength of the vehicle body.

On the other hand, the axle suspension mounted to the front wheel (FW) of the truck made of the side member (1) is installed to the knuckle, arm portion rotatably installed to one side of the lower upper arm mounted to the side member (1) The shock absorber and the arm portion are formed of a torsion bar (T) extending along the side member (1) to the rear of the vehicle.

Accordingly, the knuckle portion where the front wheel FW is installed moves up and down when the vehicle is bound, and the lower upper arm portion rotatably connected to the knuckle portion rotates as described above. Bar (T) is twisted by the rotation angle, that is, one end of the torsion bar (T) is formed so as to interlock with the lower arm, the other end is fixed to the side member (1) via the bracket through the rotational movement of the lower arm Accordingly they are twisted together.

As such, when the torsion bar T is twisted, the shock absorber applied to the knuckle portion according to the bound of the vehicle, that is, the amount of impact on the road surface is alleviated by the torsional elasticity of the torsion bar T. By attenuating, it acts as a suspension device.

At this time, the spring constant (for the torsion) of the torsion bar T is appropriately selected to the applied vehicle by appropriately selecting the diameter of the torsion bar T in consideration of the weight of the vehicle, the loading load, and the like.

However, such a small truck is used for carrying and loading cargo, that is, when a large amount of cargo is loaded in the cargo loading portion D, which occupies the entire length of the vehicle as shown in FIG. The load distributed over the center of gravity (G) is weighted to the rear of the vehicle toward the cargo loading section (D), that is, the front body load (F) and the cargo loading section of the driver's seat (C) with respect to the center of gravity (G). Excessive body behavior during rough road passage due to the difference in moment caused by the front and rear moment distances (La · Lb) between the rear body load (F ') and the cargo load (F ") in (D). Of course, while the rolling occurs, the impact (impact) impact is generated in the side member (1) of the rear wheel (RW) there is a problem that a large shock is transmitted.

Accordingly, the present invention has been invented in view of the above. As the torsion bar is pulled out toward the rear of the vehicle according to the amount of cargo loaded in the cargo loading portion, the center of gravity of the vehicle is moved to the rear of the vehicle. It is aimed at preventing excessive body behavior and impact on rolling and side members due to rough road passing along with even distribution and support.

The present invention for achieving the above object is a variable to draw a torsion bar leading to the rear portion along the side member of the vehicle equipped with axle suspension of the front wheel toward the rear of the vehicle according to the amount of cargo loaded in the load The device recognizes that the vehicle is driving according to the input signal of the speed sensor, and the load of the cargo loading part is excessive according to the signal input from the sensing sensor which is provided under the side member of the rear wheel and contacts with the leaf spring to alleviate the shock. A controller for recognizing that the vehicle is in a rough road and generating a control signal; Drive means comprising a switching valve for switching a path of oil pumped by a hydraulic pump driven together with an operation of an engine according to a control signal of a controller; A moving piston which is moved in the front and rear directions of the side member by oil supplied through the first and second supply lines connected to the switching valve of the driving means, and a torsion located at an inner side of the side member at one side of the moving piston; And moving means consisting of a moving rod protruding across the bar, an anchor coupled at the end of the moving rod, and an anchor arm for pulling the end of the torsion bar coupled to and moved by the anchor toward the rear of the vehicle. .

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

Figure 3 shows a block diagram of the center of gravity moving device installed on the body frame of a small truck according to the present invention, the present invention is a cross-member (2) H-shaped side member (1) installed across The torsion bar (T) mounted to the rear portion along the side member (1) to the axle suspension of the front wheel (FW) mounted to the driver's seat (C) forming the front portion of the rear member of the side member (1) It is controlled by a variable device that is drawn out to the rear of the vehicle according to the amount of cargo loaded in the cargo loading portion (D), the variable device is a sensor (11, 11 ') for measuring the load of the cargo loading portion (D) And the controller 10 which receives the signals of the speed sensor 12 for detecting the speed of the vehicle and processes and judges them according to the built-in program, and is driven according to the control signal of the controller 10 while being driven together with the operation of the engine. Drive means 20 for controlling the path of hydraulic pressure and the drive means 20 It comprises a moving means (30, 30 ') for drawing the torsion bar (T) to the rear of the vehicle through the hydraulic pressure supplied from the).

Here, the detection sensors (11, 11 ') is provided in the lower side of the side member (1) of the rear wheel (RW) as shown in Figure 4 as a leaf spring (L) to mitigate the impact and the side member (1) and Of course, while contacting sag together to transmit a signal to the controller 10. In this case, the controller 10 determines that the vehicle is driving in accordance with the signal input from the speed sensor 12, and also detects the sensor 11, When the measurement signal is inputted from 11 '), the side member 1 is recognized as an excessive load of cargo or a rough road surface of the cargo load part D, which is drooping toward the leaf spring L. That is, the controller The logic of the built-in program of (10) is extremely simple, which means that when a signal is input from the sensors 11 and 11 ', bumps and rebounds due to heavy loads or rough roads are driven. ), And more The control signal is generated by recognizing that the vehicle is currently driving through the signal input from the blow speed sensor 12.

In addition, the driving means 20 is a hydraulic pump 21 driven together with the operation of the engine, and the oil pumped by the hydraulic pump 21 in accordance with the control signal of the controller 10, the moving means (30, 30) And a switching valve 22 for switching the path to supply to ') or return to the oil pan.

Then, the moving means (30, 30 ') is the front of the side member 1 by the oil supplied through the first and second supply lines (35, 36) connected to the switching valve 22 of the drive means (20) Protruded to cross the moving pistons 31 and 31 'which are moved in the rear direction and the torsion bar T which is located on the inner side of the side member 1 at one side of the moving pistons 31 and 31'. The moving rods 32 and 32 ', the anchors 33 and 33' coupled at the ends of the moving rods 32 and 32 'and the torsion bar T which are moved while being moved by the anchors 33 and 33'. It consists of anchor arms (34, 34 ') for pulling the end of the vehicle toward the rear of the vehicle.

Here, the moving means (30, 30 ') are respectively installed on both sides of the side member (1) having an H-shape in parallel with each other, while the moving piston (31) of the moving means (30, 30') And 31 'are each accommodated in the chamber 1' formed inside the side member 1, of course.

In addition, the movable rods 32 and 32 'are supplied into the chamber 1' when the movable rods 32 and 32 'are moved together with the movable pistons 31 and 31' along the slot formed in the side member 1 as shown in FIG. A torsion bar seating surface 32a on which a bearing 37 is seated to reduce friction with the torsion bar T positioned at the bottom of the moving rods 32 and 32 'while preventing a leakage of oil. ) Is formed.

Here, of course, the bearing 37 is a sliding bearing.

The anchors 33 and 33 ′ are anchor rods 33a and 33a ′ fixed to the ends of the movable rods 32 and 32 ′ which move together with the movable pistons 31 and 31 ′, and the anchor rods ( 33a, 33a ') is formed by the push rod (33b, 33b') is fixed to the anchor arm (34, 34 ') elongated while being coupled to the torsion bar (T).

Here, the push rods 33b and 33b 'and the anchor arms 34 and 34' of the anchors 33 and 33 'are inclined toward each other so as to minimize the mounting space by reducing the distance therebetween.

The torsion bar T drawn out toward the rear of the vehicle by the moving means 30 and 30 'is splined on the outer circumferential surface while being fixed to the wheel FW, as shown in FIG. It consists of a first rod t and a second rod t 'having a spline formed therein so as to be drawn out and inserted into the first rod t.

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

According to the present invention, when the load by the cargo loaded in the cargo loading portion (D) of the vehicle fails to operate the sensor (11.11 ') provided in the side member (1), by the cargo loaded in the controller 10 It is judged that excessive body behavior and rolling and impact of the vehicle do not occur, and the amount of impact on the road surface through the torsional elasticity of the torsion bar T together with the axle suspension device as in the conventional case described above. Of course, this will be alleviated.

On the other hand, the side member (1) part sag toward the leaf spring (L) due to the load of a large amount of cargo in the vehicle loading portion (D) of the vehicle or the impact of driving on rough road surface, the detection sensor (11, 11 ') ) And the leaf spring L come into contact with each other, the controller 10 receiving the signals from the sensors 11 and 11 'and the speed sensor 12 is concentrated in the load rear side of the vehicle according to these two signals. As a result, the controller 10 sends a control signal to the driving means 20 to open the oil passage of the switching valve 22 so that the oil of the hydraulic pump 21 is transferred to the moving means 30 and 30 '. To be supplied.

Subsequently, the moving pistons 31 and 31 'of the moving means 30 and 30' are supplied with oil from the driving means 20 to the chamber 1 'of the side member 1 through the first supply line 35. ) Moves toward the rear of the vehicle, whereby the moving rods 32 and 32 'which are connected to the pistons 31 and 31' protrude in the direction of movement of the pistons 31 and 31 '. ') And the push rods 33b and 33b' of the anchors 33 and 33 'and the anchor arms 34 and 34' fixed at one end thereof are moved toward the rear of the vehicle to torsion bar T. The second rod (t ') is taken out from the first rod (t).

As such, when the second rod t 'of the torsion bar T, which is splined to each other, is withdrawn from the first rod t, the second rod is attached to the side member 1 supporting the cargo loading portion D. Of course, the tension portion (t ') is positioned to support and disperse the load due to the cargo loading.

That is, as shown in Figure 7, the initial center of gravity (G) of the vehicle is changed to the moving center of gravity (G ') moved by the distance moved back by the torsion bar (T) tensioned to the rear, and accordingly, the driver's seat The moment generated about the moving weight center (G ') by the front body load (F) of the part (C) and the rear body and cargo loads (F', F ") of the cargo loading part (D) As the front and rear moment distances La and Lb are appropriately adjusted so as not to be biased to one side, the loads F 'and F "

Accordingly, in the present invention, when a large amount of cargo is loaded and a rough road surface is driven, even if a large shock is transmitted through the rear wheel (RW) portion, the load (F ") due to the cargo load is dispersed as a whole, thus the transmission accuracy of the impact is increased. At the same time, excessive body behavior and rolling are also prevented.

On the other hand, when the controller 10 recognizes the signals of the detection sensors 11 and 11 'and the speed sensor 12 as the load of the cargo loading unit D or the vehicle is stopped, the vehicle 10 moves toward the rear of the vehicle. The torsion bar T which has been drawn out is inserted again toward the front to reduce the length thereof. That is, the controller 10 sends a control signal to the driving means 20 to pass the oil passage of the switching valve 22 to the second supply line. 36, the moving pistons 31 and 31 'of the moving means 30 and 30' are moved toward the front of the vehicle.

Accordingly, the moving rods 32 and 32 ', which are connected to the pistons 31 and 31' and protrude, move together with the anchors 33 and 33 ', thereby fixing the anchor arms 34 and 34' fixed to the vehicle. By moving forward, the second rod t 'of the torsion bar T is inserted into the first rod t. As a result, the entire length of the torsion bar T is reduced while the center of gravity G is also reduced. Positioning the front portion of the torsion bar (T), as in the conventional case described above, as well as to reduce the amount of impact on the road surface through the torsional elasticity of the torsion bar (T) with the axle suspension.

As described above, according to the present invention, the torsion bar leading to the rear portion along the side member of the vehicle equipped with the front wheel axle suspension device has a load center of gravity and load applied to the driver's seat and the cargo loading part according to the load level. It is adjusted while moving to the front and rear of the vehicle by the variable device so as to prevent the bias of the moment due to the gap difference, thereby supporting and distributing the load by the loaded cargo more uniformly, even when passing the rough road surface Not only behavior, but also rolling occurs, there is an effect that can reduce the transmission of a large impact due to impact impact.

1 is a block diagram of a body frame of a general small truck

2 is a state of center of gravity of a compact truck according to the prior art

3 is a configuration of the center of gravity moving device installed on the body frame of a small truck according to the invention

4 is an installation state diagram of a sensor for sensing the weight of the cargo deck of FIG.

5 is a side configuration diagram of the torsion bar moving device of FIG.

Figure 6 is a separation coupling of the torsion bar according to the present invention

Figure 7 is an operating state of moving the center of gravity by the weight of the cargo loaded on the deck in accordance with the present invention

<Description of the symbols for the main parts of the drawings>

1: side member 1 ': chamber

2: crossmember 10: controller

11,11 ': Sensor 12: Speed sensor

20: drive means 21: hydraulic pump

22: switching valve 30,30 ': means of movement

31,31 ': Moving piston 32,32': Moving rod

32a: torsion bar seating surface

33,33 ': Anchor 33a, 33a': Anchor rod

33b, 33b ': Push rod 34,34': Anchor arm

35: first supply line 36: second supply line

37: Bearing

B: Bracket C: Driver's Seat

D: Cargo Loading Department F: Front Body Load

F ': Rear body load F ": Cargo load

FA: Front Axle FW: Front Wheel

G: center of gravity G ': center of gravity

L: Leaf Spring

La · Lb: Front and rear moment distance

La '· Lb': Front and rear movement moment distance RA: Rear axle

RW: rear wheel T: torsion bar

t: first load t ': second load

Claims (10)

A torsion bar (T) leading to the rear portion along the side member (1) of the vehicle equipped with the axle suspension of the front wheel (FW) is drawn out to the rear of the vehicle according to the amount of cargo loaded in the cargo loading portion (D). Variable device Recognizing that the vehicle is driving according to the input signal of the speed sensor 12, the detection sensor 11, which is provided under the side member (1) of the rear wheel (RW) contacting the leaf spring (L) to mitigate the impact A controller 10 for generating a control signal by recognizing that the load of the cargo loading part D is excessive or rough on the road according to the signal input from 11 '); A driving means (20) consisting of a switching valve (22) for switching the path of oil pumped by the hydraulic pump (21) driven together with the operation of the engine according to the control signal of the controller (10); Moving piston 31 which is moved in the front and rear directions of the side member 1 by the oil supplied through the first and second supply lines 35 and 36 connected to the switching valve 22 of the driving means 20. 31 ') and moving rods 32 and 32' protruding across the torsion bar T located on the inner side of the side member 1 at one side of the moving pistons 31 and 31 ', and the moving. Anchor arms 33 and 33 'coupled at the ends of the rods 32 and 32' and anchor arms for pulling the ends of the coupled torsion bar T toward the rear of the vehicle while being moved by the anchors 33 and 33 '. 34, 34 ') of moving means (30,30'); Center of gravity movement of a small truck consisting of. delete delete delete The method of claim 1, wherein the moving means (30, 30 ') are respectively installed on both sides of the side member (1) parallel to each other while the moving piston (31, 31') formed in the interior of the side member (1) 1 ') each center of gravity of the small truck is characterized in that it is accommodated. The torsion bar seating surface 32a of claim 1, wherein the movable rods 32 and 32 'are formed with a bearing 37 seated thereon so as to reduce friction with the torsion bar T located at its bottom. Center of gravity shifter for small trucks. The center of gravity moving device of claim 6, wherein the bearing (37) is a sliding bearing. The anchor rods 33a and 33a 'of claim 1, wherein the anchors 33 and 33' are fixed to the ends of the movable rods 32 and 32 'which move together with the movable pistons 31 and 31'. Small, characterized in that it consists of a push rod (33b, 33b ') is fixed to the anchor arm (34, 34') extending long while being coupled to the torsion bar (T) extending from the side of the anchor rod (33a, 33a ') Center of gravity shifter for trucks. 9. The push rods (33b, 33b ') and anchor arms (34, 34') of the anchors (33, 33 ') are inclined toward each other to minimize the mounting space by reducing the distance therebetween. Center of gravity shifter for small trucks. The torsion bar (T) according to claim 1, wherein the torsion bar (T) is fixed to the wheel (FW) portion so that its movement is free, and a first rod (t) having a spline formed on an outer circumferential surface thereof, and withdrawing and inserting into the first rod (t). The center of gravity moving device of the small truck, characterized in that consisting of a second rod (t ') with a spline formed on the inner surface.