TWI688382B - Wheelchair lifting device for vehicle - Google Patents

Abstract

The invention includes a carrier, and a base, a connecting rod set, a first driving part, a telescopic rod set and a bottom plate provided on the carrier. The base and the connecting rod group form a four-link structure, which cooperates with the movement transformation of the first driving part and the telescopic rod group to respectively control the bottom plate to be placed in a flat position, a horizontally raised position, a horizontal position near the working plane, and an inclined retractable The closing position and the top folding position are changed back and forth, especially when placed flat near the working plane, it can be used for wheelchairs to enter and exit the platform smoothly. Therefore, this case has the advantages that the bottom plate is placed close to the working plane to facilitate the passage of wheelchairs, the bottom plate can be controlled by the telescopic rod group, and the electric cylinder has a self-locking function to improve safety.

Description

Wheelchair lifting device for vehicle

The invention relates to a wheelchair lifting device for a vehicle, in particular to a wheelchair wheelchair which has a bottom plate lying close to a working plane to facilitate the passage of a wheelchair, the bottom plate can be controlled by using a telescopic rod set, and the electric cylinder has a self-locking function to improve safety Device.

Common wheelchair lifting devices on the market, because of the old mechanism design, require strong output thrust, so they all use hydraulic cylinders as the power source, so the overall cost is higher and positioning is not easy.

In the old mechanism design, there is an extension plate between the bottom plate and the vehicle body, so that the body plate and the bottom plate of the lifting device can be connected, and the position of the cam is used to control the upturn of the bottom plate and the fixing of the position of the extension plate. The effect of overall folding is achieved, but this design tends to be complicated, increasing the complexity of the overall mechanism and the cost of manufacturing and maintenance.

In view of this, it is necessary to develop technology that can solve the above-mentioned conventional shortcomings.

The purpose of the present invention is to provide a wheelchair lifting device for vehicles, which has the advantages that the bottom plate is placed close to the working plane to facilitate the passage of wheelchairs, the bottom plate can be controlled by the telescopic rod set, and the electric cylinder has a self-locking function to improve safety. In particular, the problem to be solved by the present invention is that the conventional device has a relatively high overall cost, and is not easy to locate, and the design is more complicated, increasing the complexity of the overall mechanism and manufacturing and maintenance costs.

The technical means to solve the above problem is to provide a wheelchair lifting device for vehicles, which includes: a carrier with a working plane and a trailing edge; the working plane has a height from the ground; A pair of bases are set on the working plane; each base has a first pivot portion and a second pivot portion; a pair of link groups, each link group includes a linkage Rod, first link and a second link; the linkage rod has a first segment and a second segment, the first segment has a third pivotal portion and a fourth pivotal portion The second section has a fifth pivotal portion and a ninth pivotal portion; the first link is pivotally disposed between the corresponding first pivotal portion and the third pivotal portion; The second link is pivotally arranged between the corresponding second pivot portion and the fourth pivot portion; the first link and the second link are parallel to each other; the first link has A sixth pivotal portion, which is adjacent to the linked third pivotal portion; the second link has a seventh pivotal portion and an eighth pivotal portion, the seventh pivotal portion is adjacent to the second A pivot portion; the eighth pivot portion is adjacent to the fourth pivot portion; a pair of first driving portions, each of the first driving portions is pivotally connected to the corresponding sixth pivot portion and the seventh Between the pivoting parts, the first driving part has a first body, a first working rod and a power part; the power part is used for transmission, so that the first working rod and the first body are relatively telescopic; And drive the linking lever; a bottom plate has a pair of side edges and a tail end; the pair of side edges has a pair of tenth pivotal portions and a pair of eleventh pivotal portions, the pair of tenth pivots The connecting portion is pivotally arranged between the pair of fifth pivoting portions and adjacent to the tail end; the pair of eleventh pivoting portions are pivotally connected between the pair of ninth pivoting portions; and, the bottom plate is A supporting concave portion is provided to prevent the bottom plate from falling; a pair of telescopic rod groups, each telescopic rod group is pivotally connected between the corresponding eighth pivot portion and the ninth pivot portion, the telescopic The rod assembly has a second body and a second working rod; the second working rod system can expand and contract with the second body; and the bottom plate is rotated through the tail end; wherein: the carrier is a vehicle Part of the car body; the base, the first link, the second link, and the first section constitute a four-link mechanism.

The above objects and advantages of the present invention are not difficult to gain an in-depth understanding from the following detailed description and drawings of selected embodiments.

The following examples and drawings are used to explain the present invention in detail:

10: stage

11: Work plane

12: trailing edge

20: Dock

30: connecting rod group

31: linkage

311: The first section

312: The second section

32: The first link

33: Second link

40: First drive

41: First body

42: the first working rod

43: Power Department

50: bottom plate

51: Side part

52: tail end

53: Support recess

60: Telescopic rod group

61: Second body

62: Second working rod

H: height above ground

A1: The first pivot

A2: Second pivot

A3: Third pivot

A4: The fourth pivot

A5: Fifth pivot

A6: Sixth pivot

A7: The seventh pivot

A8: Eighth pivot

A9: The ninth pivot

A10: Tenth pivot

A11: Eleventh pivot

P1: Flat ground position

P2: Horizontally raised position

P3: Flat position near work plane

P4: Tilt and collapse position

P5: top-collapse position

M: auxiliary support structure

Figure 1 is an exploded schematic view of the present invention

Figure 2 is a schematic diagram of the appearance of the present invention

Figure 3 is a schematic diagram of the first operation process of the present invention

Figure 4 is a schematic diagram of the second operation process of the present invention

Figure 5 is a schematic diagram of the third operation process of the present invention

Figure 6 is a schematic diagram of the fourth operation process of the present invention

Figure 7 is a schematic diagram of the fifth operation process of the present invention

Referring to Figures 1 and 2, the present invention is a wheelchair lifting device for a vehicle, which includes:

A carrier 10 has a working plane 11 and a trailing edge 12; the working plane 11 has a height H from the ground (see Figures 3 and 4).

A pair of bases 20 are disposed on the working plane 11; each base 20 has a first pivotal portion A1 and a second pivotal portion A2.

A pair of link groups 30, each link group 30 includes a link 31, a first link 32 and a second link 33. The linking lever 31 has a first segment 311 and a second segment 312, the first segment 311 has a third pivot portion A3 and a fourth pivot portion A4; the second segment 312 It has a fifth pivotal portion A5 and a ninth pivotal portion A9. The first link 32 is pivotally disposed between the corresponding first pivotal portion A1 and the third pivotal portion A3; the second link 33 is pivotally disposed between the corresponding second pivotal portion Between A2 and the fourth pivotal portion A4; the first link 32 and the second link 33 are parallel to each other. The first link 32 has a sixth pivotal portion A6, which is adjacent to the third pivotal portion A3. The second link 33 It has a seventh pivotal portion A7 and an eighth pivotal portion A8, the seventh pivotal portion A7 is adjacent to the second pivotal portion A2; the eighth pivotal portion A8 is adjacent to the fourth pivotal portion A4.

A pair of first driving parts 40, each of the first driving parts 40 is pivotally connected between the corresponding sixth pivoting part A6 and the seventh pivoting part A7, the first driving part 40 has a The first body 41, a first working rod 42 and a power part 43. The power part 43 is used for transmission, so that the first working rod 42 and the first body 41 relatively expand and contract; and drives the linking rod 31.

A bottom plate 50 has a pair of side portions 51 and a tail end portion 52; the pair of side portions 50 has a pair of tenth pivotal portions A10 and a pair of eleventh pivotal portions A11, the pair of tenth pivots The connecting portion A10 is pivotally disposed between the pair of fifth pivoting portions A5 and adjacent to the tail end 52; the pair of eleventh pivoting portions A11 is pivotally connected between the pair of ninth pivoting portions A9.

A pair of telescopic rod groups 60, each telescopic rod group 60 is pivotally connected between the corresponding eighth pivotal portion A8 and the ninth pivotal portion A9, the telescopic rod group 60 has a second body 61 and a second working rod 62. The second working rod 62 is relatively expandable and contractible with the second body 61; and rotates through the tail end 52 (see FIGS. 6 and 7) of the bottom plate 50.

In practice, the carrier 10 may be part of the body of a vehicle (such as a box car, bus, etc.).

The base 20, the first link 32, the second link 33 and the first segment 311 constitute a four-link mechanism.

The first driving part 40 rotates relative to the base 20 and the link group 30 through the sixth pivotal part A6 and the seventh pivotal part A7.

The telescopic rod group 60 relatively rotates with the second link 33 through the eighth pivotal portion A8, and relatively rotates with the bottom plate 50 through the ninth pivotal portion A9 and the eleventh pivotal portion A11.

The first driving part 40 may be an electric cylinder assembly (or an electric gear cylinder, which is a commercially available product and is also a well-known technology).

The first body 41 corresponds to an electric cylinder assembly, and may be an electric cylinder.

The power section 43 corresponds to an electric cylinder assembly, and may be an electric cylinder driving section.

The vehicle wheelchair lifting device may further include an auxiliary support structure M.

The bottom plate 50 corresponds to the auxiliary supporting structure M, and may further include a supporting recess 53. The shape of the auxiliary supporting structure M corresponding to the supporting recess 53 may be:

[a] Two-stage type: The auxiliary supporting structure M is a two-stage structure, and is respectively connected to the opposite inner sides of the pair of second-stage portions 312 (not shown in the figure, together with Chen Ming) to support the The recess 53 is supported to prevent the bottom plate 50 from falling.

[b] Fixed type: The auxiliary support structure M is connected (or welded) to the position of the stage 10 close to the rear edge 12, and is also used to support the support recess 53 to prevent the bottom plate 50 from falling.

The present invention may include the following actions:

[a] The bottom plate lies flat on the ground: referring to FIG. 3, the first working rod 42 is completely retracted into the first body 41. And the second working rod 62 completely extends out of the second body 61, so that the bottom plate 50 is located at a flat position P1.

[b] The bottom plate rises flat toward the working surface: referring to FIG. 4, the first working rod 42 begins to extend out of the first body 41. Moreover, the second working rod 62 is partially retracted into the second body 61, and the connecting rod set 30 is pulled up, so that the bottom plate 50 is changed from the flat position P1 to a flat raised position P2.

[c] The bottom plate lies close to the working surface: referring to FIG. 5, the first working rod 42 continuously extends out of the first body 41. Moreover, the second working rod 62 is completely retracted into the second body 61 to pull up the link set 30, thereby changing the bottom plate 50 from the flat ascending position P2 to a flat near working plane position P3.

[d] The bottom plate is tilted and folded: referring to FIG. 6, the first working rod 42 continuously extends out of the first body 41, and the second working rod 62 remains completely retracted into the second body 61. At the same time, the telescopic rod group 60 rotates the bottom plate 50 with the fifth pivotal portion A5 and the ninth pivotal portion A9 as axes, so that the bottom plate 50 changes from the flat position near the working plane position P3 to an obliquely retracted Close position P4.

[e] Sticking and folding: referring to FIG. 7, the first working rod 42 completely extends out of the first body 41. The second working rod 62 remains fully retracted into the second body 61, the telescopic rod group 60 continues to rotate the bottom plate 50 with the fifth pivot portion A5 and the ninth pivot portion A9 as the axis, so that the bottom plate 50 is shifted from the tilted and folded position P4 to a set top and closed position P5.

As for the reset, the reverse action is sufficient, and will not be repeated here.

As for the telescopic rod group 60, it may be a structure that can automatically extend the pneumatic rod or the like. When the bottom plate 50 moves from the horizontal placement position P1 to the horizontal ascending position P2, and then to the horizontal placement near the working plane position P3, the second working rod 62 of the telescopic rod set 60 is fully extended The second working rod 62 of the telescopic rod group 60 continues to remain fully retracted (ie, when it is moved to the inclined retracted position P4 and the top retracted position P5 again) No further expansion), hereby Chen Ming.

In more detail, when the bottom plate 50 is located at the flat position P1, a wheelchair (not shown in the figure, together with Chen Ming) can be moved from the ground to the bottom plate 50, and when the bottom plate 50 is sequentially moved to the flat The raised position P2 and the flat near work plane position P3 can raise the wheelchair, and then the wheelchair can enter the work plane 11 directly from the bottom plate 50 (that is, into the vehicle body). Finally, the tilting folding position P4 and the top folding position P5 can be used to close the device to reduce the space occupied by the vehicle body.

The key point of the present invention is that through the clever cooperation of the connecting rod set 30, the first driving part 40 and the telescopic rod set 60, the most compact device can be used to control the lifting and lowering of the bottom plate 50, in particular, the bottom plate 50 can be controlled to lie flat ( When it is located at the position P3 lying close to the working plane, it is quite close (may have a slight gap to prevent the devices from rubbing against each other) of the working plane 11, and it can be used for wheelchairs to enter and exit the vehicle body smoothly.

In addition, this design will use gear mechanism and electric motor as the power system; in order to reduce the output thrust, the linkage mechanism of the vehicle wheelchair lifting device must be redesigned, and the electric gear cylinder can be used to achieve the lifting and lowering of the vehicle wheelchair lifting device. Rotation (collapse) movement. After the main mechanism is completed, the overall appearance of the wheelchair lifting device for the vehicle can be designed, and then the electronic sensing element is placed to accurately position the lifting and rotating of the lifting device Rotating (folding) position to ensure that the lifting and rotating (folding) position of the wheelchair lifting device for vehicles meets the design requirements.

The advantages and effects of the present invention are as follows:

[1] The bottom plate is placed close to the work plane to facilitate wheelchair access. According to the invention, through the clever cooperation of the connecting rod group, the first driving part and the telescopic rod group, the most simplified device can control the bottom plate to lie flat (when it is placed near the working plane) and is quite close to the working plane , And can be used for wheelchairs to enter and exit the car body smoothly. Therefore, the bottom plate is placed close to the work plane to facilitate wheelchair access.

[2] The telescopic rod group can be used to control the bottom plate turning. The invention can cooperate with the telescopic action of the telescopic rod group to respectively control the bottom plate to sequentially switch back and forth between the horizontal placement position, the horizontal ascending position, the horizontal placement near the working plane position, the inclined folding position and the top folding position. Therefore, the telescopic rod group can be used to control the bottom plate turning.

[3] The electric cylinder has a self-locking function to improve safety. Since the electric cylinder in this case has a self-locking function, in case the electric cylinder is accidentally damaged, the bottom plate will not suddenly change position and cause an accident. Therefore, the electric cylinder has a self-locking function to improve safety.

The above is only a detailed description of the present invention through the preferred embodiment. Any simple modifications and changes made to this embodiment will not deviate from the spirit and scope of the present invention.

10: stage

11: Work plane

12: trailing edge

20: Dock

30: connecting rod group

31: linkage

311: The first section

312: The second section

32: The first link

33: Second link

40: First drive

41: First body

42: the first working rod

43: Power Department

50: bottom plate

51: Side part

52: tail end

60: Telescopic rod group

61: Second body

62: Second working rod

A1: The first pivot

A2: Second pivot

A3: Third pivot

A4: The fourth pivot

A5: Fifth pivot

A6: Sixth pivot

A7: The seventh pivot

A8: Eighth pivot

A9: The ninth pivot

A10: Tenth pivot

A11: Eleventh pivot

P3: Flat position near work plane

Claims (2)

A vehicle wheelchair lifting device includes: a carrier with a working plane and a rear edge; the working plane has a height above the ground; a pair of bases are set on the working plane; each The base has a first pivot portion and a second pivot portion; a pair of link groups, each link group includes a link, a first link and a second link; the link It has a first segment and a second segment, the first segment has a third pivot and a fourth pivot; the second segment has a fifth pivot and a A ninth pivotal portion; the first link is pivotally disposed between the corresponding first pivotal portion and the third pivotal portion; the second link is pivotally disposed on the corresponding second pivotal Between the connecting part and the fourth pivotal part; the first link and the second link are parallel to each other; the first link has a sixth pivotal part, which is adjacent to the third pivotal link The second link has a seventh pivotal portion and an eighth pivotal portion, the seventh pivotal portion is adjacent to the second pivotal portion; the eighth pivotal portion is adjacent to the fourth pivotal A pair of first driving parts, each of the first driving parts is pivotally connected between the corresponding sixth pivoting part and the seventh pivoting part, the first driving part has a first A main body, a first working rod and a power part; the power part is used for transmission to make the first working rod and the first body relatively expand and contract; and drives the linking rod; a bottom plate has a pair of side parts And a tail end; the pair of side edges has a pair of tenth pivotal portions and a pair of eleventh pivotal portions, the pair of tenth pivotal portions are pivotally disposed between the pair of fifth pivotal portions, And adjacent to the tail end portion; the pair of eleventh pivoting portions are pivotally connected between the pair of ninth pivoting portions; and the bottom plate is provided with a supporting recess to prevent the bottom plate from falling; A pair of telescopic rod groups, each telescopic rod group is pivotally connected between the corresponding eighth pivot portion and the ninth pivot portion, the telescopic rod group has a second body and a second work Rod; the second working rod system can expand and contract with the second body; and rotate the bottom plate through the tail end; wherein: the carrier is part of the body of a vehicle; the base, the first link The rod, the second link and the first section constitute a four-link mechanism. The wheelchair lifting device for a vehicle as described in item 1 of the patent scope, wherein: the first driving part is an electric cylinder assembly; the first main system is an electric cylinder; and the power part is an electric cylinder driving part.

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