Wheelchair lifting machine with self-stopping function

Abstract

The utility model discloses a wheelchair lifting machine with a self-stopping function. The wheelchair lifting machine comprises a mounting base, two fixing bases symmetrically arranged at the two ends of the mounting base and a controller arranged at one end of the mounting base. Each fixed seat is provided with a group of folding and unfolding driving mechanisms; a tray is arranged between the two groups of folding and unfolding driving mechanisms; one end of the tray is hinged with the two groups of folding and unfolding driving mechanisms; each group of folding and unfolding driving mechanism is provided with an arc plate; a limiting touch control assembly is arranged in the fixed seat; the limiting touch control assembly comprises a limiting base and two limiting switches symmetrically arranged on the limiting base. Each limit switch is connected with an elastic contact arm; the elastic contact arm can abut against the arc plate. The controller is connected with the limiting switch and the folding and unfolding driving mechanism; the tray can be automatically stopped when lifted to the horizontal state from the grounding state and can be automatically stopped when switched to the horizontal state from the storage state, so that wheelchair passengers can get on and off a vehicle conveniently, structural use is more convenient, and structural use experience is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to transport means technical field, especially a kind of wheelchair lift with self stopping function. BACKGROUND

[0002] Wheelchair lift is a tool for wheelchair passengers to get in and out of vehicle, effectively solve the problem of wheelchair passengers to get in and out of vehicle, bring great convenience for wheelchair passengers. Existing wheelchair lift generally includes folding drive mechanism and tray, lifting, folding tray by folding drive mechanism, to realize wheelchair passengers to get in and out of vehicle.

[0003] However, existing wheelchair lift needs artificial observation and control tray lifting height in operation process, to make wheelchair passengers get in and out of vehicle, resulting in the need to operate multiple adjustments, make tray flush with vehicle floor, resulting in extremely inconvenient problem of structure use. SUMMARY

[0004] The utility model aims at overcoming above-mentioned shortcoming, provide a kind of wheelchair lift with self stopping function, realize tray by ground state lifting to horizontal state can be automatically stopped, and can be automatically stopped when switching from storage state to horizontal state, to facilitate wheelchair passengers to get in and out of vehicle, structure use is more convenient, structure use experience is better.

[0005] To achieve the above object, the specific scheme of the utility model is as follows:

[0006] A kind of wheelchair lift with self stopping function, including mounting seat, two symmetrical fixed seat being arranged at the both ends of mounting seat and controller being arranged at one end of mounting seat;

[0007] Each fixed seat is provided with a set of folding and unfolding drive mechanism;Two sets of folding and unfolding drive mechanism are provided with tray;One end of the tray is hinged to two sets of folding and unfolding drive mechanism;Each folding and unfolding drive mechanism is provided with arc plate;

[0008] Limiting touch component is arranged in the fixed seat;The limiting touch component includes limiting seat and two symmetrical limiting switches arranged in limiting seat;Each limiting switch is connected with elastic touch arm;The elastic touch arm can be in contact with arc plate;The controller is connected with limiting switch and folding and unfolding drive mechanism.

[0009] Further, the both sides of the limiting seat are slidably provided with limiting slider;Two limiting sliders are provided with limiting switch;The both sides of the limiting seat are rotatably provided with adjusting screw;The adjusting screw is rotatably connected with fixed seat;The adjusting screw is threadedly sleeved with corresponding limiting slider.

[0010] The utility model further, the controller includes control box and be located in the oil circuit seat of control box and be located in the oil tank, electric pump, pressure relief valve and hand pump of oil circuit seat, the oil tank stores hydraulic oil, the electric pump is used for pumping the hydraulic oil in the oil tank to the collection and expansion drive mechanism through the oil circuit seat, the pressure relief valve is used for making the hydraulic oil in the collection and expansion drive mechanism backflows to the oil tank through the oil circuit seat, the hand pump is used for pumping the hydraulic oil in the oil tank to the collection and expansion drive mechanism through the oil circuit seat.

[0011] The utility model further, the hand pump is detachably connected with handle, the hand pump is provided with a perforation, and the hand pump is movably provided in the perforation.

[0012] The utility model further, a limiting pin is vertically arranged in the perforation, one end of the handle is provided with a notch, and when the handle is inserted into the perforation, the limiting pin is clamped into the notch.

[0013] The utility model further, each collection and expansion drive mechanism includes telescopic oil cylinder, multistage connecting rod assembly and auxiliary collection and expansion assembly, the fixed end of telescopic oil cylinder is hinged with fixed seat, the movable end of telescopic oil cylinder is hinged with multistage connecting rod assembly, and telescopic oil cylinder is connected with oil circuit seat through oil pipe, multistage connecting rod assembly is hinged on fixed seat, tray is hinged with multistage connecting rod assembly, and auxiliary collection and expansion assembly is hinged with multistage connecting rod assembly and tray.

[0014] The utility model further, a buffer elastic member is arranged on the movable end of telescopic oil cylinder.

[0015] The utility model further, the auxiliary collection and expansion assembly includes driving arm, sliding arm, linkage rod and turnover contact seat, both sides of the end of tray close to collection and expansion drive mechanism are provided with hinged shaft, and first transition plate is connected between two hinged shafts.

[0016] One end of driving arm is hinged on hinged shaft, sliding arm is slidably arranged on driving arm, sliding arm is provided with limiting strip hole, the other end of driving arm is provided with limiting shaft, limiting shaft is movably inserted into limiting strip hole, one end of linkage rod is hinged with first transition plate, the other end of linkage rod is movably hinged with one end of sliding arm, and turnover contact seat is hinged on the other end of sliding arm.

[0017] The utility model further, turnover contact seat is inverted U shape, both side walls of turnover contact seat are hinged with sliding arm, and the surface of the back of turnover contact seat away from its opening is used for contacting with multistage connecting rod assembly.

[0018] The utility model further, multistage connecting rod assembly includes first connecting rod, second connecting rod and third connecting rod.

[0019] The first connecting rod and the second connecting rod are arranged in an up-down interval, one end of the first connecting rod and the second connecting rod is respectively hinged on different positions of the fixed seat, the other end of the first connecting rod and the second connecting rod is respectively hinged on different positions of one end of the third connecting rod, the fixed end of the telescopic oil cylinder is hinged on the hinge point of the first connecting rod and the fixed seat, the movable end of the telescopic oil cylinder is hinged on the other end of the second connecting rod, and the tray is hinged on the other end of the third connecting rod.

[0020] The utility model discloses the beneficial effects are: the utility model discloses through setting up two limit switches, and each limit switch is set up the elastic contact arm that can contact with arc plate to realize that tray can stop automatically when lifting from the ground state to the horizontal state, and can stop automatically when switching from the storage state to the horizontal state, thereby facilitating wheelchair passengers to get on and off the vehicle, and the structure is more convenient to use, and the structure use experience is better. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram after the part fixed seat structure of the utility model hides,

[0022] Figure 2 It is Figure 1 It is the partial close -up schematic drawing of M in,

[0023] Figure 3 It is the structure schematic diagram of limit touch subassembly of the utility model,

[0024] Figure 4 It is the structure schematic diagram after the part structure of control box of the utility model hides,

[0025] Figure 5 It is the part structure schematic diagram of controller of the utility model,

[0026] Figure 6 It is the part structure schematic diagram of another view of controller of the utility model,

[0027] Figure 7 It is the structure schematic diagram when the tray of the utility model is in the ground state,

[0028] Figure 8 It is Figure 7 It is the partial close -up schematic drawing of A in,

[0029] Figure 9 It is Figure 7 It is the partial close -up schematic drawing of B in,

[0030] Figure 10 It is the structure schematic diagram of another view when the tray of the utility model is in the ground state,

[0031] Figure 11 It is the part structure schematic diagram of the utility model,

[0032] Figure 12 It is the structure schematic view of the auxiliary folding assembly of the utility model;

[0033] Figure 13 It is the structure schematic view of the utility model when the tray is in the horizontal state;

[0034] Figure 14 It is the structure schematic view of the utility model when the tray is in the storage state;

[0035] The figure mark explanation: 1, the mounting seat; 11, the fixed seat; 21, the telescopic oil cylinder; 22, the multistage connecting rod assembly; 221, the first connecting rod; 222, the second connecting rod; 223, the third connecting rod; 224, the arc plate; 23, the auxiliary folding assembly; 231, the driving arm; 2311, the limiting shaft; 232, the sliding arm; 2321, the limiting strip hole; 233, the linkage; 234, the turnover contact seat; 235, the wear-resistant pad; 236, the first buffer; 24, the buffer elastic member; 3, the tray; 31, the hinged axle; 32, the first transition plate; 33, the second transition plate; 41, the shock mounting block; 411, the first body; 412, the second body; 413, the first mounting arm; 414, the second mounting arm; 415, the strip hole; 42, the shock absorber; 43, the fastener; 5, the handrail; 6, the second buffer; 71, the control box; 72, the oil way seat; 73, the oil tank; 74, the electric pump; 75, the pressure relief valve; 76, the hand pump; 761, the handle; 762, the perforation; 763, the limiting pin; 764, the notch; 81, the limiting seat; 82, the limiting switch; 83, the elastic contact arm; 84, the limiting slider; 85, the adjusting screw rod. DETAILED DESCRIPTION

[0036] The utility model will be further explained in detail in connection with the drawings and specific embodiment, and is not to limit the implementation range of the utility model to this.

[0037] As Figures 1 to 14 The utility model discloses a wheelchair lifting machine with self stopping function, including mounting seat 1, two symmetry fixed seat 11 that are arranged in the both ends of mounting seat 1 and the controller that is arranged in one end of mounting seat 1, every fixed seat 11 is equipped with a set of folding drive mechanism, two sets of folding drive mechanism between the tray 3 is equipped with, one end of tray 3 is hinged with two sets of folding drive mechanism, every set of folding drive mechanism is equipped with arc plate 224, the fixed seat 11 is equipped with limiting touch component, limiting touch component includes limiting seat 81 and two symmetry limiting switch 82 that are arranged in limiting seat 81, every limiting switch 82 is connected with elastic contact arm 83, the elastic contact arm 83 can be with arc plate 224 and the abutment, the controller is connected with limiting switch 82 and folding drive mechanism.

[0038] Specifically, in order to facilitate the explanation of the present embodiment, the limit switch 82 close to the controller side is defined as the first limit switch 82, and the limit switch 82 away from the controller side is defined as the second limit switch 82; the wheelchair lifting machine with the self-stopping function described in the present embodiment, in actual use, drives the tray 3 to move up and down by the folding and unfolding driving mechanism, and switches the tray 3 between the ground state, the horizontal state and the storage state; when the tray 3 is in the ground state, as shown in Figure 1 、 Figure 7 and Figure 10 , the elastic arms 83 of the two limit switches 82 are in contact with the arc plate 224, so that the two limit switches 82 are both in the normally closed state, when the tray 3 is lifted from the ground state to the horizontal state, as shown in Figure 4 and Figure 13 , that is, at this time, the tray 3 is flush with the bottom plate of the external vehicle, the elastic arm 83 of the first limit switch 82 is out of contact with the arc plate 224, and the first limit switch 82 is in the normally open state, thereby triggering the controller to control the folding and unfolding driving mechanism to stop driving the tray 3 to move, so that the tray 3 remains in the horizontal state flush with the bottom plate of the external vehicle, at this time, the elastic arm 83 of the second limit switch 82 still maintains contact with the arc plate 224, so that the second limit switch 82 still remains in the normally closed state, so as to facilitate the wheelchair occupant to get on the vehicle;

[0039] When the tray 3 is switched from the horizontal state to the storage state, as shown in Figure 14 , the elastic arm 83 of the second limit switch 82 gradually comes out of contact with the arc plate 224, so that the second limit switch 82 is in the normally open state; when the tray 3 is switched from the storage state to the horizontal state, the elastic arm 83 of the second limit switch 82 is in contact with the arc plate 224, so that the second limit switch 82 changes from the normally open state to the normally closed state, thereby triggering the controller to control the folding and unfolding driving mechanism to stop driving the tray 3 to continue to move, so as to facilitate the wheelchair occupant to get off the vehicle.

[0040] The present embodiment sets two limit switches 82, each of which is provided with an elastic arm 83 capable of contacting the arc plate 224, thereby realizing the automatic stop when the tray 3 is lifted from the ground state to the horizontal state, and the automatic stop when the tray 3 is switched from the storage state to the horizontal state, thereby facilitating the wheelchair occupant to get on and off the vehicle, the structure is more convenient to use, and the structure use experience is better.

[0041] As shown in Figure 2 and Figure 3As shown, in some embodiments of the wheelchair lifting machine with self-stopping function, the two sides of the limiting seat 81 are slidably provided with limiting sliders 84; the two limiting sliders 84 are provided with limiting switches 82; the two sides of the limiting seat 81 are rotatably provided with adjusting screws 85; the adjusting screws 85 are rotatably connected with the fixed seat 11; and the adjusting screws 85 are threadedly sleeved with the corresponding limiting sliders 84.

[0042] Specifically, by screwing the adjusting screw 85, the adjusting screw 85 drives the limiting slider 84 to slide relative to the limiting seat 81, and the limiting slider 84 drives the limiting switch 82 to slide, so as to adjust the contact position of the elastic arm 83 and the circular arc plate 224, to finely adjust the horizontal state position of the tray 3, so that the wheelchair passenger gets on and off the vehicle more smoothly, and at the same time, the wheelchair lifting machine can adapt to the use of vehicles with different floor heights.

[0043] As shown, Figures 4 to 6 As shown, in some embodiments of the wheelchair lifting machine with self-stopping function, the controller comprises a control box 71, an oil way seat 72 arranged in the control box 71, an oil tank 73, an electric pump 74, a pressure relief valve 75 and a hand pump 76 arranged in the oil way seat 72; the oil tank 73 stores hydraulic oil; the electric pump 74 is used for pumping the hydraulic oil in the oil tank 73 to the folding and unfolding driving mechanism through the oil way seat 72; the pressure relief valve 75 is used for making the hydraulic oil pumped into the folding and unfolding driving mechanism return to the oil tank 73 through the oil way seat 72; and the hand pump 76 is used for pumping the hydraulic oil in the oil tank 73 to the folding and unfolding driving mechanism through the oil way seat 72.

[0044] By arranging the oil way seat 72, the oil tank 73, the electric pump 74, the pressure relief valve 75 and the hand pump 76, a hand and electric integrated oil pump structure is formed. When the electricity is normally used, the hydraulic oil in the oil tank 73 is pumped to the folding and unfolding driving mechanism by the electric pump 74, so that the folding and unfolding driving mechanism drives the tray 3 to change from the storage state to the horizontal state to the ground state. When the electric pump 74 controls the hydraulic oil to return to the oil tank 73, the tray 3 changes from the ground state to the horizontal state to the storage state. When the electricity cannot be normally used, the user can pump the hydraulic oil into the folding and unfolding driving mechanism by the hand pump 76, so as to drive the tray 3 to change from the storage state to the horizontal state to the ground state. When the tray 3 needs to change from the ground state to the horizontal state to the storage state, the hydraulic oil returns to the oil tank 73 through the pressure relief valve 75. In this way, the use demand of the user can be better met, and the structure is more reliable in use.

[0045] As shown, Figure 6As shown in the figure, in some embodiments of the wheelchair lifting machine with self-stopping function, the hand pump 76 is detachably connected with a handle 761; the hand pump 76 is provided with a through hole 762; and the hand pump 76 is movably arranged in the through hole 762. In this embodiment, the handle 761 is detachably connected with the hand pump 76, so that the handle 761 can be detached and stored when the electric device is normally used, and the handle 761 can be installed on the hand pump 76 to perform oil pumping operation on the hand pump 76 when the handle 761 is needed.

[0046] As shown in the figure, Figure 6 In some embodiments of the wheelchair lifting machine with self-stopping function, a limiting pin 763 is vertically arranged in the through hole 762; one end of the handle 761 is provided with a notch 764; and when the handle 761 is inserted into the through hole 762, the limiting pin 763 is clamped into the notch 764. In this embodiment, the limiting pin 763 cooperates with the notch 764 to limit the handle 761, so that the handle 761 can be detached and installed.

[0047] As shown in the figure, Figure 7 and Figure 8 In some embodiments of the wheelchair lifting machine with self-stopping function, shock absorbing assemblies are arranged on both sides of the other end of the tray 3; the folding and unfolding driving mechanism can drive the tray 3 to switch between the ground state, the horizontal state and the storage state; and the shock absorbing assemblies can contact the folding and unfolding driving mechanism during the switching of the tray 3 from the horizontal state to the storage state, so as to absorb the shock of the tray 3 during the folding and storage process and reduce the noise generated during the folding and storage process, thereby providing better use experience and higher structural reliability.

[0048] As shown in the figure, Figure 8 In some embodiments of the wheelchair lifting machine with self-stopping function, the shock absorbing assembly includes a shock absorbing mounting block 41 and a shock absorbing piece 42; the shock absorbing mounting block 41 is detachably connected to the side wall of the tray 3 through a fastener 43; and the shock absorbing piece 42 is detachably connected to the shock absorbing mounting block 41. In this embodiment, the shock absorbing mounting block 41 is provided for the installation of the shock absorbing piece 42, and the shock absorbing mounting block 41 is detachably connected to the side wall of the tray 3, so that the shock absorbing mounting block 41 can be detached and maintained; when the tray 3 is switched from the horizontal state to the storage and folding state, the shock absorbing piece 42 gradually contacts the folding and unfolding driving mechanism, thereby absorbing the shock of the tray 3 and providing higher structural reliability.

[0049] As shown in the figure, Figure 8As shown, further, the shock-absorbing mounting block 41 comprises a first body 411, a second body 412, a first mounting arm 413 and a second mounting arm 414; one end of the second body 412 is connected to one end of the first body 411 at an angle; the first mounting arm 413 extends vertically from one side of the first body 411; the second mounting arm 414 extends vertically from one side of the second body 412; the first mounting arm 413 and the second mounting arm 414 are connected to the side wall of the tray 3 through fasteners 43 respectively; the first body 411 and the second body 412 are both mounted with shock-absorbing pieces 42. In this embodiment, the first mounting arm 413 and the second mounting arm 414 are provided to facilitate the mounting of the shock-absorbing mounting block 41; by providing the shock-absorbing pieces 42 on the first body 411 and the second body 412, the shock-absorbing effect on the tray 3 during folding is further improved.

[0050] In addition, the first body 411 and the second body 412 are connected at an angle so that the two shock-absorbing pieces 42 can better contact the folding and unfolding driving mechanism.

[0051] As shown in the drawings, Figure 8 In some embodiments of the wheelchair lifting machine with the self-stopping function, the first mounting arm 413 and the second mounting arm 414 are both provided with a strip-shaped hole 415; and the fastener 43 is a screw or a bolt. In this way, the position of the shock-absorbing piece 42 can be adjusted so that the shock-absorbing piece 42 can better contact the folding and unfolding driving mechanism during the folding of the tray 3. Preferably, the shock-absorbing piece 42 is shock-absorbing glue, which has good shock-absorbing effect and low cost.

[0052] As shown in the drawings, Figure 1 、 Figure 4 、 Figure 7 、 Figures 10 to 14 In some embodiments of the wheelchair lifting machine with the self-stopping function, each set of the folding and unfolding driving mechanism comprises a telescopic oil cylinder 21, a multi-stage linkage assembly 22 and an auxiliary folding and unfolding assembly 23; the fixed end of the telescopic oil cylinder 21 is hinged to the fixed seat 11; the movable end of the telescopic oil cylinder 21 is hinged to the multi-stage linkage assembly 22; the telescopic oil cylinder 21 is connected to the oil way seat 72 through an oil pipe (not shown in the drawings); the multi-stage linkage assembly 22 is hinged to the fixed seat 11; the tray 3 is hinged to the multi-stage linkage assembly 22; and the auxiliary folding and unfolding assembly 23 is hinged to the multi-stage linkage assembly 22 and the tray 3.

[0053] Specifically, in actual application, the telescopic oil cylinder 21 outputs power, and through the linkage cooperation of the multi-stage linkage assembly 22 and the auxiliary folding and unfolding assembly 23, the lifting and overturning and folding actions of the tray 3 are realized, so that the tray 3 can be switched between the grounded state, the horizontal state and the storage state, thereby facilitating the wheelchair occupant to get on and off the vehicle.

[0054] As Figure 1 , Figure 4 , Figure 7 , Figure 10 , Figure 13 and Figure 14 indicated, the wheelchair lifting machine with self-stopping function in the embodiment, in some embodiments, the movable end of the telescopic oil cylinder 21 is sleeved with a buffer elastic element 24. The buffer elastic element 24 is arranged in the embodiment, so that the telescopic oil cylinder 21 is more stable when extending or retracting, so that the movement of the whole structure is more stable. Specifically, the buffer elastic element 24 is a spring.

[0055] As Figure 1 , Figure 4 , Figure 7 , Figure 9 , Figures 10 to 14 indicated, the wheelchair lifting machine with self-stopping function in the embodiment, in some embodiments, the auxiliary folding assembly 23 includes a driving arm 231, a sliding arm 232, a linkage rod 233 and a turnover contact seat 234; the tray 3 is provided with a hinged shaft 31 on both sides of one end close to the folding driving mechanism; a first transition plate 32 is connected between the two hinged shafts 31.

[0056] One end of the driving arm 231 is hinged on the hinged shaft 31; the sliding arm 232 is slidably sleeved on the driving arm 231; the sliding arm 232 is provided with a limiting strip hole 2321; the other end of the driving arm 231 is provided with a limiting shaft 2311; the limiting shaft 2311 movably extends into the limiting strip hole 2321; one end of the linkage rod 233 is hinged with the first transition plate 32; the other end of the linkage rod 233 is movably hinged with one end of the sliding arm 232; the turnover contact seat 234 is hinged on the other end of the sliding arm 232.

[0057] Specifically, when the wheelchair occupant needs to get on the vehicle, the telescopic oil cylinder 21 extends outward, and through the linkage of the multi-stage connecting rod assembly 22 and the auxiliary folding assembly 23, the tray 3 is placed in the ground state. After the wheelchair occupant enters the tray 3, the telescopic oil cylinder 21 retracts inward. At this time, the telescopic oil cylinder 21 drives the tray 3 to lift horizontally through the multi-stage connecting rod assembly 22. At this time, the first transition plate 32 is in the folded state. After the turnover contact seat 234 contacts the multi-stage connecting rod assembly 22, the multi-stage connecting rod assembly 22 extrudes the turnover contact seat 234 to turn over, so that the turnover contact seat 234 reliably contacts the multi-stage connecting rod assembly 22. Then, the multi-stage connecting rod assembly 22 exerts downward pressure on the sliding arm 232 through the turnover contact seat 234, so that the sliding arm 232 slides relative to the driving arm 231. The limiting shaft 2311 moves relative to the limiting strip hole 2321. At this time, the sliding arm 232 pushes the first transition plate 32 to turn over from the folded state to the horizontal state through the linkage rod 233, until the limiting shaft 2311 abuts against the upper end of the limiting strip hole 2321. At this time, the sliding arm 232 and the driving arm 231 form an integral body, and the first transition plate 32 is in the horizontal state. At this time, the tray 3 is also in the horizontal state, so as to facilitate the transition of the wheelchair occupant from the tray 3 to the vehicle.

[0058] With the telescopic oil cylinder 21 further retracting inward, the multi-stage connecting rod assembly 22 exerts downward pressure on the driving arm 231 through the turnover contact seat 234 and the sliding arm 232, thereby driving the tray 3 to turn over upward with the hinge point of the tray 3 and the multi-stage connecting rod assembly 22 as the fulcrum, so that the tray 3 switches from the horizontal state to the storage state, until the tray 3 is completely switched to the storage state. At the same time, the tray 3 moves the first transition plate 32 in the horizontal state to the mounting seat 1.

[0059] Similarly, when the wheelchair occupant needs to get on the vehicle, the tray 3 switches from the storage state to the horizontal state, and the action principle process is reversed, which will not be described here.

[0060] As shown in Figure 9 , Figure 11 and Figure 12 , in some embodiments, the turnover contact seat 234 of the wheelchair lifting machine with a self-stopping function is inverted U-shaped, and the two side walls of the turnover contact seat 234 are hinged to the sliding arm 232. The surface of the turnover contact seat 234 facing away from the opening is used to contact the multi-stage connecting rod assembly 22. In this embodiment, the turnover contact seat 234 is inverted U-shaped, so that the turnover contact seat 234 has a larger contact area with the multi-stage connecting rod assembly 22, so that the multi-stage connecting rod assembly 22 can reliably exert a pushing force on the sliding arm 232 and the driving arm 231 through the turnover contact seat 234. The structure is more reliable and stable.

[0061] As shown in Figure 9 and Figure 12As shown, in some embodiments of the wheelchair lifting machine with self-stopping function, the surface of the turnover contact seat 234 opposite to the opening is provided with a wear-resistant pad 235. In this way, the wear of the turnover contact seat 234 and the multi-stage linkage assembly 22 is reduced, and the noise generated when the turnover contact seat 234 moves relative to the multi-stage linkage assembly 22 is also reduced.

[0062] As shown, Figure 12 As shown, in some embodiments of the wheelchair lifting machine with self-stopping function, a first buffer 236 is arranged between the sliding arm 232 and the driving arm 231, one end of the first buffer 236 is connected with the sliding arm 232, and the other end of the first buffer 236 is connected with the driving arm 231; the driving arm 231 is provided with an avoiding hole for avoiding the first buffer 236. In this embodiment, the first buffer 236 is arranged to further improve the stability of the sliding arm 232 when sliding relative to the driving arm 231, and the structure is more reliable. Preferably, the first buffer 236 is a nitrogen gas spring.

[0063] As shown, Figure 1 , Figure 4 , Figure 7 , Figure 10 , Figure 13 and Figure 14 As shown, in some embodiments of the wheelchair lifting machine with self-stopping function, the multi-stage linkage assembly 22 includes a first linkage 221, a second linkage 222, and a third linkage 223.

[0064] The first linkage 221 and the second linkage 222 are arranged in an up-down interval, one end of the first linkage 221 and the second linkage 222 is respectively hinged at different positions of the fixed seat 11; the other end of the first linkage 221 and the second linkage 222 is respectively hinged at different positions of one end of the third linkage 223; the fixed end of the telescopic oil cylinder 21 is hinged at the hinge point of the first linkage 221 and the fixed seat 11; the movable end of the telescopic oil cylinder 21 is hinged at the other end of the second linkage 222; the tray 3 is hinged at the other end of the third linkage 223.

[0065] Specifically, a parallelogram structure is formed between the hinge point of the first linkage 221 and the fixed seat 11, the hinge point of the first linkage 221 and the third linkage 223, the hinge point of the second linkage 222 and the fixed seat 11, and the hinge point of the second linkage 222 and the third linkage 223; in this way, when the turnover contact seat 234 is not in contact with the second linkage 222, the third linkage 223 can drive the tray 3 to move up and down when the telescopic oil cylinder 21 drives the second linkage 222 to swing.

[0066] When the tray 3 is switched from the horizontal state to the storage state, the turnover contact seat 234 is in contact with the second connecting rod 222, the second connecting rod 222 extrudes the turnover contact seat 234 to turn over, so that the surface of the turnover contact seat 234 facing away from the opening is in full contact with the surface of the second connecting rod 222, thereby reliably pushing the sliding arm 232 to slide relative to the driving arm 231 to drive the first transition plate 32 to turn over from the folded state to the horizontal state; as the second connecting rod 222 further pushes the sliding arm 232, the sliding arm 232 turns over the tray 3 upwardly to fold and store by the driving arm 231;

[0067] When the tray 3 needs to be switched from the storage state to the horizontal state, under the joint action of the nitrogen gas spring and the second connecting rod 222, the tray 3 gradually turns over from the storage state to the horizontal state until it is in the horizontal state; as the second connecting rod 222 further swings, the first transition plate 32 turns over from the horizontal state to the folded state under the action of the nitrogen gas spring.

[0068] As shown in Figure 1 、 Figure 4 、 Figure 7 、 Figure 10 、 Figure 13 and Figure 14 , in some embodiments, the third connecting rod 223 is hinged with the handrail 5; the handrail 5 is movably arranged in the third connecting rod 223; one end of the handrail 5 is hinged on the limiting shaft 2311. Specifically, the handrail 5 is arranged to enable the wheelchair occupant to hold the handrail 5 when driving into or out of the tray 3, thereby ensuring the stability of the wheelchair and reducing the psychological burden of the wheelchair occupant during the lifting process of the tray 3.

[0069] The second buffer 6 is further arranged between the handrail 5 and the third connecting rod 223; the fixed end of the second buffer 6 is hinged on the handrail 5, and the movable end of the second buffer 6 is hinged on the third connecting rod 223. Specifically, when the tray 3 is switched from the horizontal state to the storage state, the driving arm 231 pushes the handrail 5 to turn over about the hinge point where the handrail 5 is hinged with the third connecting rod 223 through the limiting shaft 2311, and the second buffer 6 provides a buffer for the handrail 5, thereby realizing the synchronous movement of the handrail 5 and the tray 3. Preferably, the second buffer 6 is a nitrogen gas spring.

[0070] As shown in Figure 1 、 Figure 4 、 Figure 7 、 Figure 10 、 Figure 13 and Figure 14As shown, in some embodiments, the second transition plate 33 is hinged to one end of the tray 3 away from the folding and unfolding driving mechanism; the second transition plate 33 can be flipped relative to the tray 3, and when the wheelchair passenger needs to drive out of or into the tray 3, the second transition plate is flipped to a horizontal state, so that the wheelchair passenger drives into or out of the tray 3.

[0071] The above is only the preferred embodiment of the present application, so equivalent changes or modifications made to the structure, features and principles described in the scope of the present application patent application are included in the protection scope of the present application patent application.

Claims

1. A wheelchair lift with a self-stop function, characterized in that, The application relates to a folding seat, which comprises a mounting base, two symmetrical fixing bases arranged at two ends of the mounting base and a controller arranged at one end of the mounting base. Each fixing base is provided with a set of folding and unfolding driving mechanisms; a tray is arranged between the two sets of folding and unfolding driving mechanisms; one end of the tray is hinged to the two sets of folding and unfolding driving mechanisms; each set of folding and unfolding driving mechanisms is provided with a circular arc plate; A limiting touch component is arranged in the fixing base; the limiting touch component comprises a limiting base and two symmetrical limiting switches arranged on the limiting base; each limiting switch is connected with an elastic touch arm; the elastic touch arm can abut against the circular arc plate; the controller is connected with the limiting switches and the folding and unfolding driving mechanisms.

2. The wheelchair lift with self-stop function according to claim 1, characterized in that, Both sides of the limiting base are slidably provided with limiting sliding blocks; the two limiting sliding blocks are provided with limiting switches; both sides of the limiting base are rotatably provided with adjusting screws; the adjusting screws are rotatably connected with the fixing base; the adjusting screws are threadedly sleeved with the corresponding limiting sliding blocks.

3. The wheelchair lift with self-stop function according to claim 1, characterized in that, The controller comprises a control box, an oil way base arranged in the control box, an oil tank, an electric pump, a pressure relief valve and a hand pump arranged in the oil way base; the oil tank stores hydraulic oil; the electric pump is used for pumping the hydraulic oil in the oil tank to the folding and unfolding driving mechanisms through the oil way base; the pressure relief valve is used for returning the hydraulic oil pumped into the folding and unfolding driving mechanisms to the oil tank through the oil way base; the hand pump is used for pumping the hydraulic oil in the oil tank to the folding and unfolding driving mechanisms through the oil way base.

4. The wheelchair lift with self-stop function according to claim 3, characterized in that, The hand pump is detachably connected with a handle; the hand pump is provided with a perforation; the hand pump is movably arranged in the perforation.

5. The wheelchair lift with self-stop function according to claim 4, characterized in that, A limiting pin is vertically arranged in the perforation; one end of the handle is provided with a notch; when the handle is inserted into the perforation, the limiting pin is clamped into the notch.

6. The wheelchair lift with self-stop function according to claim 3, characterized in that, Each set of folding and unfolding driving mechanisms comprises a telescopic oil cylinder, a multi-stage connecting rod assembly and an auxiliary folding and unfolding assembly; the fixed end of the telescopic oil cylinder is hinged to the fixing base; the movable end of the telescopic oil cylinder is hinged to the multi-stage connecting rod assembly; the telescopic oil cylinder is connected with the oil way base through an oil pipe; the multi-stage connecting rod assembly is hinged to the fixing base; the tray is hinged to the multi-stage connecting rod assembly; the auxiliary folding and unfolding assembly is hinged to the multi-stage connecting rod assembly and the tray.

7. The wheelchair lift with self-stop function according to claim 6, characterized in that, The movable end of the telescopic oil cylinder is sleeved with a buffer elastic member.

8. The wheelchair lift with self-stop function according to claim 6, characterized in that, The auxiliary folding and unfolding assembly comprises a driving arm, a sliding arm, a linkage rod and a turnover contact base; both sides of one end of the tray close to the folding and unfolding driving mechanisms are provided with hinged shafts; a first transition plate is connected between the two hinged shafts; One end of the driving arm is hinged to the hinged shaft; the sliding arm is slidably sleeved on the driving arm; the sliding arm is provided with a limiting strip hole; the other end of the driving arm is provided with a limiting shaft; the limiting shaft movably extends into the limiting strip hole; one end of the linkage rod is hinged to the first transition plate; the other end of the linkage rod is movably hinged to one end of the sliding arm; the turnover contact base is hinged to the other end of the sliding arm.

9. The wheelchair lift with self-stop function according to claim 8, characterized in that, The turnover contact base is in an inverted U shape; both side walls of the turnover contact base are hinged to the sliding arm; the surface of the turnover contact base away from the opening is used for contacting the multi-stage connecting rod assembly.

10. The wheelchair lift with self-stop function according to claim 6, characterized in that, The multi-stage connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod; The first connecting rod and the second connecting rod are arranged in an up-down interval, one end of the first connecting rod and the second connecting rod is respectively hinged on different positions of the fixed seat, the other end of the first connecting rod and the second connecting rod is respectively hinged on different positions of one end of the third connecting rod, the fixed end of the telescopic oil cylinder is hinged on the hinged point of the first connecting rod and the fixed seat, the movable end of the telescopic oil cylinder is hinged on the other end of the second connecting rod, and the tray is hinged on the other end of the third connecting rod.

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