TW202021558A - Wheelchair lifting device for vehicle capable of facilitating the passage of wheelchair, controlling the bottom plate to overturn, and improving safety - Google Patents

Abstract

The invention includes a carrier, a base disposed to the carrier, a linkage, a first driving part, a telescopic rod set and a bottom plate. The base and the linkage form a four-bar linkage structure, which is matched up with the position changes of the first driving part and the telescopic rod set to respectively control the bottom plate to switch among a horizontal and ground placement position, a horizontal and lifting position, a horizontal and near- working plane position, a tilt and folding position and a top folded position. When in the horizontal and near working plane position, a wheelchair can easily enter or exit the carrier smoothly. The invention has the advantages that the bottom plate can be horizontally placed near the working plane to facilitate the passage of wheelchair, the bottom plate can be controlled by the telescopic rod set to be overturned, and an electric cylinder has a self-locking function to improve safety.

Description

Wheelchair lifting device for vehicle

The present invention relates to a wheelchair lifting device for a vehicle, in particular to a wheelchair lifting device for a vehicle that has the bottom plate being placed flat and close to the working plane, which facilitates the passage of wheelchairs, can use a telescopic rod group to control the bottom plate flip, and the electric cylinder has a self-locking function to improve safety. Device.

The common wheelchair lifting devices for vehicles on the market require a strong output thrust due to the old mechanism design. Therefore, hydraulic cylinders are used as the power source, so the overall cost is relatively high and the positioning is not easy. The old mechanism design, there is an extension plate between the bottom plate and the car body, so that the car body and the bottom plate of the lifting device can be connected, and the position of the limiting cam is used to control the upturn of the bottom plate, and the position of the extension plate is fixed. The overall folding effect is achieved, but this design tends to be complicated, which increases the complexity of the overall mechanism and the production and maintenance costs. In view of this, it is necessary to develop a technology that can solve the above-mentioned conventional shortcomings.

The purpose of the present invention is to provide a wheelchair lifting device for a vehicle, which has the advantages that the bottom plate is placed flat and close to the working plane to facilitate the passage of the wheelchair, the telescopic rod group can be used to control the bottom plate flip, and the electric cylinder has the self-locking function to improve safety. In particular, the problem to be solved by the present invention is that the traditional device has a relatively high overall cost, and the positioning is not easy, the design is biased, and the complexity of the overall mechanism is increased and the production and maintenance costs are increased. The technical means to solve the above problem is to provide a wheelchair lifting device for a vehicle, which includes: a carrier with a working plane and a rear edge; the working plane with a height above the ground; a pair of bases On the working plane; each base has a first pivotal portion and a second pivotal portion; a pair of linkage groups, each linkage group includes a linkage rod, a first linkage and a The second link; the link has a first section and a second section, the first section has a third pivotal part and a fourth pivotal part; the second section has A fifth pivotal portion and a ninth pivotal portion; the first link is pivoted between the corresponding first pivot portion and the third pivot portion; the second link is pivoted 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 pivot portion, which Is adjacent to the linkage third pivot portion; the second link has a seventh pivot portion and an eighth pivot portion, the seventh pivot portion is adjacent to the second pivot portion; the eighth pivot The connecting portion is adjacent to the fourth pivotal portion; a pair of first driving portions, each of the first driving portions is pivotally connected between the corresponding sixth pivotal portion and the seventh pivotal portion, the first A 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 driving the linkage rod; a bottom plate , The system has a pair of side portions and a tail end; the pair of side portions has a pair of tenth pivotal portions and a pair of eleventh pivotal portions, and the pair of tenth pivotal portions are pivoted on the pair Between the fifth pivotal portion and adjacent to the tail end; the pair of eleventh pivotal portions are pivotally connected between the pair of ninth pivotal portions; a pair of telescopic rod groups, each of which is pivoted Connected between the corresponding eighth pivotal portion and the ninth pivotal portion, the telescopic rod assembly has a second body and a second working rod; the second working rod can be connected to the second body Relatively stretch; and rotate the bottom plate through the tail end. The above objectives and advantages of the present invention can be easily understood from the detailed description of the selected embodiments and the accompanying drawings. Hereinafter, the present invention will be described in detail with the following examples and drawings:

Referring to Figures 1 and 2, the present invention is a wheelchair lifting device for a vehicle, which includes: a carrier 10 having a working plane 11 and a rear edge 12; the working plane 11 has a ground height H (Refer to Figures 3 and 4). A pair of bases 20 are set on the working plane 11; each base 20 has a first pivot portion A1 and a second pivot portion A2. A pair of connecting rod groups 30, each connecting rod group 30 includes a connecting rod 31, a first connecting rod 32 and a second connecting rod 33. The linkage lever 31 has a first section 311 and a second section 312. The first section 311 has a third pivotal portion A3 and a fourth pivotal portion A4; the second section 312 It has a fifth pivotal portion A5 and a ninth pivotal portion A9. The first link 32 is pivoted between the corresponding first pivot portion A1 and the third pivot portion A3; the second link 33 is pivoted to the corresponding second pivot 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 linkage third pivotal portion A3. The second link 33 has a seventh pivot portion A7 and an eighth pivot portion A8. The seventh pivot portion A7 is adjacent to the second pivot portion A2; the eighth pivot 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 pivot part A6 and the seventh pivot 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 to make the first working rod 42 and the first body 41 relatively expand and contract; and to drive the linkage 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 have 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 pivoted between the pair of fifth pivotal portions A5 and adjacent to the tail end 52; the pair of eleventh pivotal portions A11 is pivotally connected between the pair of ninth pivotal portions A9. A pair of telescopic rod groups 60, each telescopic rod group 60 is pivotally connected between the corresponding eighth pivot portion A8 and the ninth pivot portion A9, the telescopic rod group 60 has a second body 61 and a second working rod 62. The second working rod 62 can be relatively telescopic with the second body 61; and rotates the bottom plate 50 through the tail end 52 (see FIGS. 6 and 7). In practice, the carrier 10 can be a part of a vehicle (such as a van, a bus, etc.). The base 20, the first connecting rod 32, the second connecting rod 33, and the first section 311 constitute a four-bar linkage mechanism. The first driving portion 40 rotates relative to the base 20 and the linkage group 30 through the sixth pivot portion A6 and the seventh pivot portion A7. The telescopic rod group 60 rotates relative to the second link 33 through the eighth pivot portion A8, and rotates relative to the bottom plate 50 through the ninth pivot portion A9 and the eleventh pivot portion A11. The first driving part 40 may be an electric cylinder assembly (or called 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 block. The first power part 43 corresponds to an electric cylinder assembly, and may be an electric cylinder driving part. The wheelchair lifting device for a vehicle 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: the auxiliary supporting structure M is a two-stage structure and is respectively connected to the opposite ends of the pair of second-stage parts 312 The inner side (not shown in the figure, firstly disclosed) is used to support the supporting recess 53 and prevent the bottom plate 50 from falling. [b] Fixed type: The auxiliary support structure M is connected (or welded) to the position of the carrier 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 is placed on the ground: referring to FIG. 3, the first working rod 42 is completely retracted into the first body 41. In addition, 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 lays flat and rises toward the working surface: referring to Figure 4, the first working rod 42 begins to extend out of the first body 41. And the second working rod 62 is partially retracted into the second body 61, and the connecting rod group 30 is pulled up, so that the bottom plate 50 is transformed from the flat position P1 to a flat raised position P2. [c] The bottom plate is placed flat and close to the working surface: referring to Figure 5, the first working rod 42 continuously extends out of the first body 41. And the second working rod 62 is completely retracted into the second body 61 and the connecting rod group 30 is pulled up, so that the bottom plate 50 is transformed from the flat raised position P2 to a flat near working plane position P3. [d] The bottom plate is slanted and folded: referring to Figure 6, the first working rod 42 continues to extend out of the first body 41, and the second working rod 62 remains fully 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 the axis, so that the bottom plate 50 is transformed from the flat near working plane position P3 to an inclined retractable position.合 position P4. [e] Put on top and fold: Refer to Figure 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, and the telescopic rod group 60 uses the fifth pivotal portion A5 and the ninth pivotal portion A9 as the axis, and continuously rotates the bottom plate 50 to make the bottom plate 50 is transformed from the inclined folding position P4 to a top folding position P5. As for the reset, the reverse action is sufficient, so I won’t repeat it. Regarding the telescopic rod group 60, it can be a structure that can automatically extend a pneumatic rod. When the bottom plate 50 moves from the flat position P1 to the flat raised position P2, and then to the flat close to the working plane position P3, the second working rod 62 of the telescopic rod group 60 is completely extended The second working rod 62 of the telescopic rod group 60 continues to remain in the fully retracted state (ie, the second working rod 62 of the telescopic rod group 60 is continuously compressed when it is moved to the inclined folding position P4 and the top folding position P5. No longer stretched), hereby stated. In more detail, when the bottom plate 50 is located in the horizontal position P1, a wheelchair (not shown in the figure) can be moved from the ground to the bottom plate 50, and when the bottom plate 50 is moved to the horizontal position in sequence By placing the raised position P2 and the flat close to the working plane position P3, the wheelchair can be raised so that the wheelchair can directly enter the working plane 11 from the bottom plate 50 (that is, into the vehicle body). Finally, through the inclined folding position P4 and the top folding position P5, the folding device can reduce the space occupied by the vehicle body. The key point of the present invention is that through the ingenious cooperation of the connecting rod set 30, the first driving part 40 and the telescopic rod set 60, the simplest device can be used to control the lifting of the bottom plate 50, especially the bottom plate 50 can be controlled to lie flat ( When it is located at the flat near working plane position P3) and is quite close (may be slightly gaped to prevent the devices from colliding with each other) the working plane 11, and the wheelchair can enter and exit the vehicle body smoothly. Furthermore, this design will switch to a gear mechanism and an 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. The electric gear cylinder can be used to achieve the lifting and lowering of the vehicle wheelchair lifting device. Rotation (folding) movement. When the main mechanism is completed, the overall appearance of the vehicle wheelchair lifting device can be designed, and then electronic sensing components can be inserted to accurately locate the lifting and rotating (folding) positions of the lifting device to ensure the lifting and rotating of the vehicle wheelchair lifting device The (folded) position meets the design requirements. The advantages and effects of the present invention are as follows: [1] The bottom plate is placed flat and close to the working plane to facilitate wheelchair passage. Through the clever cooperation of the connecting rod group, the first driving part and the telescopic rod group, the present invention can control the bottom plate to be placed flat (when it is located at the position near the working plane) and is quite close to the working plane. , And the wheelchair can enter and exit the car body smoothly. Therefore, the bottom plate is placed flat and close to the working plane to facilitate wheelchair passage. [2] The telescopic rod group can be used to control the bottom plate turning. The present invention can cooperate with the telescopic action of the telescopic rod group to respectively control the bottom plate to turn back and forth between the flat position, the flat rising position, the flat near working plane position, the inclined folding position and the top folding position. Therefore, the telescopic rod group can be used to control the flip of the bottom plate. [3] The electric cylinder has a self-locking function to improve safety. Since the electric cylinder in this case has a self-locking function, if 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 with a preferred embodiment, and any simple modifications and changes made to the embodiment will not depart from the spirit and scope of the present invention.

10: Carrier 11: Working plane 12: Rear edge 20: Base 30: Link group 31: Link rod 311: First section 312: Second section 32: First link 33: Second link 40 : First driving part 41: first body 42: first working rod 43: power part 50: bottom plate 51: side part 52: tail end 53: support recess 60: telescopic rod group 61: second body 62: first Second working rod H: height from the ground A1: first pivot part A2: second pivot part A3: third pivot part A4: fourth pivot part A5: fifth pivot part A6: sixth pivot part A7: Seventh pivot joint A8: Eighth pivot joint A9: Ninth pivot joint A10: Tenth pivot joint A11: Eleventh pivot joint P1: Flat position P2: Flat raised position P3: Lay flat and close to the working plane position P4: Inclined folding position P5: Top folding position M: Auxiliary support structure

Fig. 1 is a schematic diagram of the disassembly of the present invention. Fig. 2 is a schematic diagram of the appearance of the present invention. Fig. 3 is a schematic diagram of the first operation process of the present invention. Fig. 4 is a schematic diagram of the second operation process of the present invention. Fig. 6 is a schematic diagram of the action process 4 of the present invention; Fig. 7 is a schematic diagram of the action process 5 of the present invention

10: Stage

11: working plane

12: trailing edge

20: Dock

30: connecting rod group

31: Linkage lever

311: The first section

312: The second section

32: The first link

33: second link

40: The first drive part

41: The first body

42: The first working rod

43: Power Department

50: bottom plate

51: side

52: tail end

60: Telescopic rod group

61: The second body

62: second working rod

A1: The first pivot

A2: The second pivot

A3: Third pivot

A4: The fourth pivot

A5: Fifth pivot

A6: The sixth pivot

A7: The seventh pivot

A8: Eighth pivot

A9: Ninth pivot

A10: Tenth pivot

A11: The eleventh pivot

P3: lay flat near the working plane

Claims (4)

A wheelchair lifting device for a vehicle includes: a carrier with a working plane and a rear edge; the working plane has a height from the ground; a pair of bases are arranged on the working plane; The base system has a first pivotal part and a second pivotal part; a pair of link groups, each link group includes a link rod, a first link and a second link; the link rod The system has a first section and a second section. The first section has a third pivotal portion and a fourth pivotal section; the second section has a fifth pivotal portion and a The ninth pivotal portion; the first link is pivoted between the corresponding first pivotal portion and the third pivotal portion; the second link is pivoted to the corresponding second pivot Between the connecting portion and the fourth pivotal portion; the first connecting rod and the second connecting rod are parallel to each other; the first connecting rod has a sixth pivotal portion, which is adjacent to the third pivotal connecting Section; the second link system 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 pivot A pair of first driving parts, each of the first driving parts is pivotally connected between the corresponding sixth pivot part and the seventh pivot part, and the first driving part has a first The main 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 expanded and contracted; and drive the linkage rod; a bottom plate having a pair of side parts And a tail end; the pair of side edges have a pair of tenth pivotal portions and a pair of eleventh pivotal portions, the pair of tenth pivotal portions are pivoted between the pair of fifth pivotal portions, And adjacent to the tail end; the pair of eleventh pivotal portions are pivotally connected between the pair of ninth pivotal portions; a pair of telescopic rod groups, each telescopic rod group is pivotally connected to the corresponding eighth Between the pivotal portion and the ninth pivotal portion, the telescopic rod assembly has a second body and a second working rod; the second working rod is relatively telescopic with the second body; and passes through the tail end Part rotate the bottom plate. For example, the wheelchair lifting device for a vehicle described in item 1 of the scope of patent application, wherein the carrier is a part of the body of a vehicle. For the wheelchair lifting device for a vehicle as described in item 1 of the scope of patent application, wherein the base, the first link, 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 scope of patent application, wherein: the first driving part is an electric cylinder assembly; the first system is an electric cylinder block; the first power part is an electric cylinder driving part .

Images