KR101419737B1 - Sub-step for vehicles - Google Patents

Abstract

The present invention is characterized in that a driving pulley is connected to a pair of driven pulleys rotating symmetrically to rotate, and a link portion connected to each driven pulley is symmetrically rotated by rotation of the driving pulley, , A technique for a vehicle-mounted auxiliary footrest that implements a rearward sliding operation. The auxiliary footrest for vehicle mounting according to the present invention adopts a solid structure of the pulley and the link portion for realizing the sliding action of the footrest portion so that the manufacturing cost can be reduced and the durability can be improved at the same time. According to the present invention, a pair of driven pulleys rotating symmetrically with each other are brought into close contact with each other by gear engagement, and the drive pulley is connected to the one driven pulley by gear engagement so as to rotate, and the pair of driven pulleys and the drive pulley The drive force can be efficiently transmitted to the link portions connected to the respective driven pulleys by the rotation of the drive pulley.

Description

{SUB-STEP FOR VEHICLES}

The present invention is characterized in that a driving pulley is connected to a pair of driven pulleys rotating symmetrically to rotate, and a link portion connected to each driven pulley is symmetrically rotated by rotation of the driving pulley, , A technique for a vehicle-mounted auxiliary footrest that implements a rearward sliding operation.

Generally, since the floor of the cabin is much higher than the floor of the cabin, the side door portion of the vehicle is equipped with an auxiliary footrest which can slide in and out of the cabin to assist safe boarding and getting off.

However, an example of the conventional auxiliary footrest is a cause of frequent failure due to an asymmetrical driving force in the sliding operation of the footrest.

Another example of the conventional auxiliary scaffolding is that the interlocking process between the components for realizing the slide operation process of the scaffolding portion is coarse, causing frequent failures.

Another example of the conventional auxiliary footrest has adopted a hydraulic cylinder for realizing the slide operation process of the footrest, which has a disadvantage of high manufacturing cost and slow response of the slide operation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle mounting structure capable of reducing the manufacturing cost and improving durability by adopting a solid structure of a pulley and a link portion for realizing sliding action of a footrest portion. And an auxiliary footrest.

In order to accomplish the above object, according to the present invention, there is provided an auxiliary footrest for a vehicle, comprising: a footrest part for supporting a load from an upper part in a protruded state, A first link portion connected to a rear end portion of the foot portion and guiding the front and rear foot portions of the foot portion while alternating between expansion and folding; A second link that is connected to the rear end of the footrest part by mutually facing each other and that extends and folds symmetrically with the first linking part to guide the footrests to slide in a straight line in front and rear, part; A first driven pulley connected to a rear end of the first link portion and applying a driving force for expanding and folding the first link portion while rotating in a constant direction; A first driven pulley coupled to a rear end of the second link portion and rotated in a direction opposite to the first driven pulley by a driving force of the first driven pulley in engagement with the first driven pulley, Two driven pulleys; A drive pulley that rotates by a drive force externally applied and applies a rotational force to the first driven pulley in a state engaged with the first driven pulley; And a motor pulley that rotates by a drive force applied from the outside and applies a rotational force to the drive pulley while rotating in a state engaged with the upper portion of the drive pulley.

In the present invention, the first link portion includes a bar-shaped first plate and a bar-shaped second plate rotatably connected to each other, the second link portion includes a third plate having the same shape as the first plate, And the first link part is extended or folded on the basis of the connecting part between the first plate and the second plate and the connecting part between the third plate and the fourth plate It is preferable that the shape in which the second link portion is extended or folded is symmetrical.

A pair of guide frames for guiding front and rear slides of the footrest in a state where both end portions of the footrest are fitted; And a support frame that interconnects and supports a pair of guide frames and is connected to the vehicle.

The guide frame of the present invention is formed with upper and lower bent plates which are projected side by side on the upper and lower sides of the inner side wall and extend along the longitudinal direction and guide the front and rear slides of the foot plate in a state where the side end portions of the foot plate are fitted.

In order to reduce the friction area of the foot plate when the foot plate of the present invention is slid in the forward and backward directions, the guide plate is bent in two stages and is guided by a guide which is in continuous contact with the bottom surface of the upper bent plate, the inner side wall of the guide frame, A plurality of brackets are provided along the longitudinal direction of the guide frame, and the footrests are fitted to the guide brackets and closely contact with the guide frames and are maintained in the excited state.

The upper support bracket is formed in a cylindrical shape on the upper surface of the upper bending plate along the longitudinal direction of the upper bending plate, And the lower support bracket is formed in a cylindrical shape on the lower surface of the lower bending plate along the longitudinal direction of the lower bending plate and has a cross section in the form of a hook having an opened lower portion, Thereby maintaining the horizontal position of the lower bending plate.

A plurality of magnetic flux sensors are disposed along the forward and backward slide directions of the foot plate in a state of being spaced apart from the foot plate by a predetermined distance from the foot plate portion of the present invention and a position sensing sensor for sensing the position of the magnetic flux sensor is mounted on the bottom face of the foot plate When the footrest is slid forward and backward, the front and rear slide movements of the footrest are controlled according to a preset pattern according to a plurality of magnetic flux sensors sensed by the position detection sensor.

The auxiliary footrest for vehicle mounting according to the present invention adopts a solid structure of the pulley and the link portion for realizing the sliding action of the footrest portion so that the manufacturing cost can be reduced and the durability can be improved at the same time.

According to the present invention, a pair of driven pulleys rotating symmetrically with each other are brought into close contact with each other by gear engagement, and the drive pulley is connected to the one driven pulley by gear engagement so as to rotate, and the pair of driven pulleys and the drive pulley The drive force can be efficiently transmitted to the link portions connected to the respective driven pulleys by the rotation of the drive pulley.

In addition, since the guide bracket is provided on the inner wall of the guide frame to reduce the friction area of the foot plate during the slide operation of the foot plate, smooth slide operation of the foot plate can be induced, The durability of the foot part can be further improved.

In addition, since the support bracket is provided on the upper bent plate and the lower bent plate of the guide frame, it is possible to prevent the guide frame from slapping and warping, which induces the slide operation of the footrest.

1 is an exploded perspective view showing an auxiliary footrest for a vehicle according to the present invention,
2 is a perspective view showing an auxiliary footrest for vehicle mounting according to the present invention,
3 is a plan view showing an auxiliary footrest for vehicle mounting according to the present invention,
4 is a bottom view showing an auxiliary footrest for vehicle mounting according to the present invention,
5 is an exemplary view showing a state in which a link is folded according to the present invention,
6 is an exemplary view showing an operation of a pulley for expanding a link portion according to the present invention,
7 is an exemplary view showing a state in which a link portion according to the present invention is expanded,
8 is an exemplary view showing an operation of a pulley for folding a link portion according to the present invention,
9 is an exploded perspective view showing a guide frame and a guide bracket according to the present invention,
10 is a cross-sectional view illustrating a guide frame and a guide bracket according to the present invention.

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

FIG. 1 is an exploded perspective view showing an auxiliary footrest for a vehicle according to the present invention, FIG. 2 is an assembled perspective view showing an auxiliary footrest for a vehicle according to the present invention, and FIG. Fig. 4 is a bottom view showing an auxiliary footrest for vehicle mounting according to the present invention. Fig.

1 to 4, a vehicle-mounted auxiliary footrest according to the present invention includes a footrest portion 10, a first link portion 20, a second link portion 30, a first driven pulley (not shown) 40, a second driven pulley 50, a drive pulley 60, and a motor pulley 70.

The footrest (10) is slid in a state of being mounted on a lower portion of a doorway of a vehicle and performs forward and rearward projecting and retracting movements, and supports the load from the top in a protruded state. The pedestal portion 10 is preferably formed in a rectangular shape, and a bar-shaped plate is connected side by side, and then the frame portion is finished with a frame. It is preferable that the material is made of light aluminum and is adopted as an industrial grade purity having durability against warping considering the load of a passenger stepping on the upper surface of the footrest portion 10. [

The first link portion 20 is connected to the rear end portion of the footrest portion 10, and guides the footrest portion 10 back and forth while alternating between expansion and folding.

More specifically, the first link portion 20 includes a bar-shaped first plate 21 and a bar-shaped second plate 22 rotatably connected to each other, and a rear end of the first plate 21 The rear end of the second plate 22 is connected to the front end of the first plate 21 while being connected to the first driven pulley 40 and receiving the driving force of folding and expansion from the rotation of the first driven pulley 40 The front end of the second plate (22) is connected to the rear end of the footrest (10).

The second link portion 30 is connected to the rear end portion of the footrest portion 10 by facing the first link portion 20 and extends and folds symmetrically with respect to the first link portion 20, ) Are guided to slide in a straight line in front and rear without leaning toward one side when they protrude and retract.

The second link portion 30 includes a third plate 31 having the same shape as the first plate 21 and a fourth plate 32 having the same shape as the second plate 22, And the rear end of the third plate 31 is connected to the second driven pulley 50 to receive a driving force of folding and expansion from the rotation of the second driven pulley 50, The rear end of the fourth plate 32 is connected and the front end of the fourth plate 32 is connected to the rear end of the foot plate 10. [

At this time, the first link portion 20 is expanded or folded on the basis of the connecting portion of the first plate 21 and the second plate 22, It is preferable that the shapes of the second link portions 30 extending or folding with respect to the connecting portions are symmetrical. The first link portion 20 and the second link portion 30 are symmetrically expanded and folded so that the foot portion 10 that is slid in a state connected to the link portions 20 and 30 is positioned at the side So that frequent failures can be prevented.

The first driven pulley 40 is connected to the rear end of the first link portion 20 and rotates in a predetermined direction to transmit a driving force for expanding and folding the first link portion 20 to the first link portion 20 . Specifically, the first driven pulley 40 is formed with a toothed gear on its outer peripheral wall and is connected to the second driven pulley 50 by gear engagement.

A shaft, which is a rotary shaft, is fitted and fixed to a central portion of the first driven pulley 40. The lower end of the shaft penetrates through the housing C1 and the lower end of the shaft passes through the rear end of the first plate 21 as the first link portion 20 And this shaft is rotated integrally with the first driven pulley 40 to transmit the driving force due to the rotation of the first driven pulley 40 to the first plate 21 as the first link portion 20.

The second driven pulley 50 is connected to the rear end of the second link portion 30 and is driven by the driving force of the first driven pulley 40 while engaged with the first driven pulley 40, The driving force for expanding and folding the second link portion 30 is applied to the second link portion 30. [ Specifically, the second driven pulley 50 is formed with a toothed gear on the outer peripheral wall and is connected to the first driven pulley 40 by gear engagement.

A shaft, which is a rotary shaft, is fitted and fixed to a central portion of the second driven pulley 50. The lower end of the shaft penetrates through the housing C1 and the lower end of the shaft passes through the rear end of the third plate 31 as the second link portion 30 And the shaft is rotated integrally with the second driven pulley 50 to transmit the driving force due to the rotation of the second driven pulley 50 to the third plate 31 as the second link portion 30. [

The driving pulley 60 is rotated by a driving force applied from the outside and applies a rotational force to the first driven pulley 40 while being engaged with the first driven pulley 40. In more detail, the drive pulley 60 is formed with a toothed gear on its outer circumferential wall and is connected to the first driven pulley 40 by gear engagement. The upper surface of the driving pulley 60 is formed with a fitting groove into which the lower portion of the motor pulley 70 is fitted. When the lower portion of the motor pulley 70 is fitted in the fitting groove, The motor pulley 70 and the drive pulley 60 rotate integrally.

A shaft, which is a rotary shaft, is fitted and fixed to the lower central portion of the drive pulley 60. The lower end of the shaft is rotatably fixed in a state of being inserted through a housing (C1) of a hexahedron whose one surface is opened.

The motor pulley 70 is rotated by a driving force applied from the outside and rotates integrally with the driving pulley 60 while being engaged with the fitting groove formed in the upper portion of the driving pulley 60 to rotate the driving pulley 60 . Also preferably, the motor pulley 70 may be integrally connected to a small motor connected to an external power source. Reference numeral C2 in Fig. 1 denotes a housing having a hexahedron with one side opened, and is seated on the upper surface of the rear support frame 91, and is coupled to the rear support frame 91 in a state covering the motor pulley 70. [

Referring to FIG. 1, the present invention further includes a guide frame 80 and support frames 91, 92, and 93.

The guide frame 80 guides the front and rear slides of the foot plate 10 in a state in which the both end portions of the foot plate 10 are fitted on the inner wall, and is arranged in a pair in parallel with each other.

The support frame is constituted by a rear support frame 91, a front support frame 92 and a lower support frame 93. The pair of guide frames 80 are interconnected and supported and connected to the vehicle.

The rear support frame 91 is fastened to the rear end of the pair of guide frames 80 to support the rear end of the guide frame 80. On the lower surface of the rear support frame 91, A housing C2 covering the motor pulley 70 is fastened to the upper surface of the rear support frame 91. The housing C2 is fixed to the upper surface of the rear support frame 91, Respectively. A through hole is formed in the rear support frame 91 corresponding to the lower portion of the motor pulley 70 and is engaged with and connected to the upper surface of the first driven pulley 40 with the lower portion of the motor pulley 70 passing through the through hole .

The front support frame 92 is fastened to the front end of the pair of guide frames 80 and supports the front end of the guide frame 80. The front support frame 92 has a stepped portion 10 And a slot portion is formed.

A plurality of magnetic flux sensors 111, 112, and 113 are mounted on the upper surface of the lower support frame 93 along the front and rear slide directions of the foot plate 10, do.

As described above, the support frames 91, 92, and 93 have been specifically described. However, it is needless to say that other types of support frames may be added to securely fasten the vehicle to the vehicle.

1, a lower portion of the foot frame 10 is provided on the upper surface of the lower support frame 93 along the forward and backward slide directions of the foot plate 10 with a certain distance from the foot plate 10 A plurality of magnetic flux sensors (111, 112, 113) are arranged in a row. A position sensing sensor 120 for sensing the position of the magnetic flux sensors 111, 112 and 113 is mounted on the bottom surface of the foot plate 10 at positions corresponding to the magnetic flux sensors 111, 112 and 113. When the foot part 10 slides forward and backward, the front and rear parts of the foot part 10 are moved in accordance with a preset pattern according to the plurality of magnetic flux sensors 111, 112 and 113 sensed by the position detection sensor 120 The slide motion is controlled.

The position detecting sensor 120 mounted on the lower portion of the foot plate 10 at the beginning of the slide operation in which the foot plate 10 protrudes in accordance with an external control signal in a state where the foot plate 10 is inserted in detail, And is located vertically above the magnetic flux sensor 111 located at the rear end of the frame 80.

When the magnetic flux sensor 111 positioned at the rear end of the position sensing sensor 120 is sensed, the pedestal portion 10 is set to slide forward, and when the magnetic flux sensor 112 positioned at the frontmost position of the position sensing sensor 120 is sensed When the position detecting sensor 120 detects the magnetic flux sensor 112 located at the frontmost position and then detects the magnetic flux sensor 113 located at the middle position, the footrest portion 10 The rear sliding operation speed of the backward sliding operation is lowered.

The reason why the position sensing sensor 120 senses the flux sensor 112 positioned at the foremost position and then detects the magnetic sensor 113 located at the middle position is to lower the speed of the back sliding operation of the footrest portion 10, , 30) is folded, it is possible to prevent an excessive external force from being applied to the connecting portion. It is also preferable that the magnetic flux sensor 113 positioned at the middle is disposed adjacent to the flux sensor 112 located at the forefront in the direction of the magnetic flux sensor 111 located at the rearmost position.

[Figure 5] is an exemplary view showing a state where a link is folded according to the present invention, [Figure 6] is an exemplary view showing an operation of a pulley for extending a link portion according to the present invention, [Figure 7] FIG. 8 is an exemplary view showing an operation of a pulley for folding a link portion according to the present invention.

The driven pulleys 40 and 50, the drive pulley 60 and the link portions 20 and 30 are moved in the forward and backward sliding operation of the footrest portion 10 with reference to FIGS. 5 to 8 The following is a detailed description of the process.

5 is a state in which the foot part 10 is inserted and the first link part 20 and the second link part 30 are folded symmetrically with respect to each other. When the rotational driving force of the motor pulley 70 according to the control from the outside is applied to the driving pulley 60 so that the foot part 10 protrudes as shown in FIG. 6, the driving pulley 60 rotates counterclockwise The first driven pulley 40 engaged with the drive pulley 60 rotates in the clockwise direction and the first full rate 21 rotates in the clockwise direction so that the first link portion 20 ].

The first driven pulley 40 engaged with the drive pulley 60 rotates in the clockwise direction and the second driven pulley 50 engaged with the first driven pulley 40 rotates counterclockwise, The second link portion 30 is extended as shown in Fig. 7 while the second link portion 31 is rotated counterclockwise.

[7] FIG. 7 is a state in which the foot plate portion 10 is protruded, and the first link portion 20 and the second link portion 30 are symmetrically extended. When the rotational driving force of the motor pulley 70 according to the control from the outside is applied to the driving pulley 60 to insert the foot part 10 as shown in FIG. 8, the driving pulley 60 rotates clockwise The first driven pulley 40 engaged with the drive pulley 60 rotates counterclockwise so that the first pull rate 21 rotates counterclockwise and the first link portion 20 rotates counterclockwise, 5].

The first driven pulley 40 engaged with the drive pulley 60 is rotated in the counterclockwise direction and the second driven pulley 50 engaged with the first driven pulley 40 is rotated in the clockwise direction, The second link portion 30 is folded as shown in Fig. 5 while the second link portion 31 rotates clockwise.

FIG. 9 is an exploded perspective view illustrating a guide frame and a guide bracket according to the present invention, and FIG. 10 is a sectional view showing a guide frame and a guide bracket according to the present invention.

Referring to FIGS. 9 and 10, the guide frame 80 is provided with upper and lower bent plates 81 and 82 projecting side by side on the upper and lower sides of the inner wall and extending in the longitudinal direction, And guide the front and rear slides of the foot plate 10 in a state in which the side end portions of the foot plate 10 are sandwiched between the lower folding plates 81 and 82. [

The guide bracket 100 bent in two stages so as to be in continuous contact with the bottom surface of the upper bending plate 81, the inner side wall of the guide frame 80 and the upper surface of the lower bending plate 82, The footrest 10 is closely fitted to the guide bracket 100 and is kept in a hovering state with the guide frame 80. When the footrest 10 is slid in the forward and backward directions, 10 is reduced.

An upper support bracket 81a is formed on the upper surface of the upper bending plate 81. The upper support bracket 81a is formed in a cylindrical shape on the upper surface of the upper bending plate 81 along the longitudinal direction of the upper bending plate 81 And has a cross-section in the form of a hook having an open top, and is connected to the support frames 91 and 92 to maintain the level of the upper bending plate 81.

A lower support bracket 82a is formed on the lower surface of the lower bending plate 82. The lower support bracket 82a is formed in a cylindrical shape on the lower surface of the lower bending plate 82 along the longitudinal direction of the lower bending plate 82 And has a cross-section in the form of a hook having an open bottom, and is connected to the support frames 91 and 92 to maintain the level of the lower bend plate 82.

The upper support bracket 81a and the lower support bracket 82a prevent warping of the upper bent plate 81 and the lower bent plate 82 from the load of the foot plate 10 and have a cross- A fastening bolt passing through the support frames 91 and 92 can be fitted and fixed in a state of being in tight contact with the frames 91 and 92. [

10: foot part 20: first link part
21: first plate 22: second plate
30: second link portion 31: third plate
32: fourth plate 40: first driven pulley
50: second driven pulley 60: driving pulley
70: motor pulley 80: guide frame
81: upper bend plate 82: lower bend plate
81a: upper support bracket 82a: lower support bracket
91: rear support frame 92: front support frame
93: lower support frame 100: guide bracket
111, 112, 113 magnetic flux sensor 120 position sensor
C1, C2: Housing

Claims (8)

A pedal part (10) which slides in a state of being mounted on a lower part of a doorway of a vehicle and performs forward and backward projecting and outward movement and supports a load from an upper part in a protruded state;
A bar-shaped first plate (21) and a bar-shaped second plate (22) are connected to the rear end of the footrest portion so as to be pivotally connected to each other. The connecting portion of the first plate and the second plate A first link portion (20) for guiding the front and rear foot portions of the foot portion alternately while expanding and folding alternately;
A third plate 31 of the same shape as the first plate and a fourth plate 32 of the same shape as the second plate are rotatably connected to each other, The first and second plates are extended and folded with respect to a connecting portion of the third and fourth plates so as to be symmetrical with respect to a shape in which the first link portion is expanded or folded with reference to a connecting portion of the first and second plates, A second link portion (30) for guiding the front side and the rear side to slide in a straight line without deviating to one side at the time of attachment and retraction;
A first driven pulley (40) connected to a rear end of the first link portion and applying a driving force for expanding and folding the first link portion while rotating in a predetermined direction;
A second driven pulley that is connected to a rear end portion of the second link portion and rotates in a direction opposite to the first driven pulley due to a driving force of the first driven pulley in engagement with the first driven pulley, A second driven pulley (50) for applying a driving force;
A drive pulley (60) rotating by a drive force externally applied and applying a rotational force to the first driven pulley while being engaged with the first driven pulley;
And an auxiliary stool for mounting the vehicle.
The method according to claim 1,
Further comprising a motor pulley (70) rotating by a driving force externally applied and applying a rotational force to the driving pulley while being rotated in an engaged state with an upper portion of the driving pulley.
delete The method of claim 2,
A pair of guide frames (80) for guiding the front and rear slides of the footrest in a state where both ends of the footrest are fitted;
Supporting frames (91, 92, 93) connected to and supporting the pair of guide frames and connected to the vehicle;
Further comprising: an auxiliary footrest mounted on the vehicle.
The method of claim 4,
The guide frame 80 is provided with an upper and a lower bent plate 81 extending in the longitudinal direction and projecting side by side on the inner side wall and guiding the front and rear slides of the foot plate in a state in which the side end portion of the foot plate is fitted , 82) are formed on the outer peripheral surface of the vehicle.
The method of claim 5,
A plurality of guide brackets 100 bent in two stages so as to be in continuous contact with the bottom surface of the upper bending plate, the inner side wall of the guide frame, and the upper surface of the lower bending plate are provided along the longitudinal direction of the guide frame, Wherein the footrest portion is closely fitted to the guide bracket and is kept in a hovering state with respect to the guide frame so that the friction area of the footrest portion is reduced when the footrest portion is slid in the forward and backward directions. Scaffolding.
The method of claim 6,
And an upper support bracket which is connected to the support frame and which maintains a horizontal position of the upper bending plate, and a lower support bracket which is formed in a cylindrical shape on the upper surface of the upper bending plate along a longitudinal direction of the upper bending plate, (81a); And
And a lower support bracket connected to the support frame to maintain a horizontal level of the lower bend plate, the lower support bracket being connected to the support frame, (82a);
Further comprising: an auxiliary footrest mounted on the vehicle.
The method of claim 7,
A plurality of magnetic flux sensors (111, 112, 113) are disposed along the front and rear sliding directions of the footrest portion at a predetermined distance from the footrest portion at a lower portion of the footrest portion. When the foot plate is slid back and forth, the front and rear slide movements of the foot plate are controlled according to a preset pattern according to the plurality of magnetic flux sensors sensed by the position detection sensor Features an auxiliary footrest for vehicle mounting.

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