CN215821442U

CN215821442U - Electric push rod starting type wheelbarrow dragging head and combined wheelchair

Info

Publication number: CN215821442U
Application number: CN202120315342.8U
Authority: CN
Inventors: 毛忻
Original assignee: Boneng Electrical Appliance Changzhou Co ltd
Current assignee: Boneng Electrical Appliance Changzhou Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-02-15
Anticipated expiration: 2031-02-03

Abstract

The utility model provides an electric push rod starting type monocycle tow head and a combined wheelchair, wherein the combined wheelchair comprises the tow head, the tow head comprises a vehicle head, an electric lifting mechanism and an angle adjusting mechanism, and the vehicle head is used for being held, controlled in direction, supported and advanced by a user; one end of the electric lifting mechanism is detachably connected with the wheelchair, the other end of the electric lifting mechanism is connected with the head of the wheelchair through the angle adjusting mechanism, and one end of the wheelchair close to the electric lifting mechanism can be lifted upwards to be in a suspended state through the deformation of the electric lifting mechanism; one end of the angle adjusting mechanism is fixed on the vehicle head, the other end of the angle adjusting mechanism is provided with at least two first installation positions connected with the electric lifting mechanism, and the electric lifting mechanism is fixed on different installation positions to enable the vehicle head to have different inclination angles. The mop head has the characteristics of flexible adjustment, good adaptability and quick and convenient adjustment.

Description

Electric push rod starting type wheelbarrow dragging head and combined wheelchair

Technical Field

The utility model relates to the technical field of wheelchairs, in particular to an electric push rod starting type wheelbarrow dragging head and a combined wheelchair, which are suitable for special transportation tools for patients or disabled persons.

Background

The wheelchair is generally divided into an electric folding structure and a manual folding structure, is a special transportation tool for the activities of home rehabilitation, turnover transportation, hospitalization, outgoing and the like of wounded, patients and disabled people, and brings convenience to the mobility-handicapped and family members.

As shown in fig. 1, a pair of large rear wheels 6, a pair of small front wheels 5 and a pedal frame 7 for placing and supporting the lower limbs are generally arranged under a common wheelchair body 200, the rear wheels 6 are mainly used for supporting and running the whole gravity of the wheelchair, the front wheels 5 are generally universal wheels, have the function of supporting and controlling the advancing direction, the advancing speed cannot be too high when four wheels are adopted for advancing, otherwise, the universal wheels at the front end are not easy to control, and the safety problem is easily caused. Therefore, along with the requirements on the functions of the wheelchair such as speed, automatic traveling and the like in the market, the front end of the wheelchair is additionally provided with the towing head mechanism, the wheelchair can be towed in an electric mode, and the existing connection structure of the towing head mechanism and the wheelchair is generally complex and is not convenient for realizing quick installation and disassembly; the handle of the head dragging mechanism is in a fixed angle, so that the angle of the handle cannot be adjusted according to the characteristics of the height, the weight and the like of a user; in addition, need lift up the universal wheel of wheelchair front end behind the first mechanism of adoption dragging, otherwise can cause frequent wrench movement of wheelchair, the mechanism that lifts up that has now adopts manual mode to promote to drag the head and lift up the front wheel, wastes time and energy.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to overcome the defects of complex connecting structure, non-adjustable handle angle and manual lifting in the prior art, the utility model provides an electric push rod starting type monocycle dragging head and a combined wheelchair.

The technical scheme adopted for solving the technical problems is as follows: an electric push rod starting type monocycle towing head comprises a head, an electric lifting mechanism and an angle adjusting mechanism, wherein the head is used for being held, controlled in direction, supported and advanced by a user; one end of the electric lifting mechanism is detachably connected with the wheelchair, the other end of the electric lifting mechanism is connected with the head of the wheelchair through the angle adjusting mechanism, and one end of the wheelchair close to the electric lifting mechanism can be lifted upwards to be in a suspended state through the deformation of the electric lifting mechanism; one end of the angle adjusting mechanism is fixed on the vehicle head, the other end of the angle adjusting mechanism is provided with at least two first installation positions connected with the electric lifting mechanism, and the electric lifting mechanism is fixed on different installation positions to enable the vehicle head to have different inclination angles in a vertical plane.

Furthermore, in order to adjust the inclination angle between the vehicle head and the vehicle frame, the angle adjusting mechanism comprises a rotating plate and a vertical pipe hoop, the first installation positions are arranged at one end of the rotating plate, different first installation positions have different heights in a vertical plane, and the other end of the rotating plate is fixedly connected to an outer vertical pipe of the vehicle head through the vertical pipe hoop.

Furthermore, the two rotating plates are arranged oppositely and parallelly in the vertical plane, the end parts of the rotating plates are arc-shaped, and the first installation positions are uniformly distributed in the circumferential direction by taking the circle center of the arc-shaped end part as the center.

The front end of the frame can be directly fixed on the first installation position, the frame and the rotating plate are connected in a single point mode at the moment, relative rotation between the frame and the installation plate is easily caused when the frame is stressed greatly, and therefore the inclination angle of a vehicle head and the change of the lifting height of the front end of the wheelchair are caused.

The first installation position and the second installation position are adopted to realize fixed connection of two points, so that relative rotation between the frame and the installation plate is avoided, meanwhile, the first installation position is circumferentially arranged along the second installation position, when the position is adjusted, the frame rotates around the connecting shaft only by loosening the connection of the second installation position, the position of the frame and the first installation position can be adjusted, the alignment adjustment is convenient, and the installation efficiency is improved.

When the angle between frame and the locomotive is at the beginning assembly, adjust according to customer's demand, select suitable mounted position to satisfy inclination's demand, after the position selection is fixed, the position between frame and the locomotive remains unchangeable.

Furthermore, the electric lifting mechanism comprises a frame and an electric pushing cylinder, the frame comprises a front connecting rod and a rear connecting rod, one end of the electric pushing cylinder is hinged to the front connecting rod, the other end of the electric pushing cylinder is hinged to the rear connecting rod, and an included angle formed between the front connecting rod and the rear connecting rod on one side close to the electric pushing cylinder is smaller than 180 degrees; and the front end of the front connecting rod is connected with the rotating plate of the angle adjusting mechanism, and one end of the rear connecting rod, which is far away from the front connecting rod, is provided with a quick dismounting structure connected with the wheelchair. The front connecting rod and the rear connecting rod can be of hollow tubular structures or solid structures, and in order to realize the control of the electric push cylinder, the electric push cylinder control device further comprises a controller, and the controller is mounted on the frame through a controller box.

Furthermore, the quick disassembly and assembly structure comprises a bolt, a transit pipe and a connecting pipe, the connecting pipe is fixedly connected to the wheelchair, a connecting cavity for accommodating the transit pipe is further arranged on the connecting pipe, at least two first pin holes are formed in the side wall of the connecting cavity, and the first pin holes can be transversely arranged, or vertically arranged, or arranged in a matrix form; the connecting cavity can be located above or below the connecting pipe so as to be connected with the transfer pipe conveniently, the connecting cavity can be an annular cavity body which is matched with the shape of the transfer pipe and is provided with openings at two ends, the connecting cavity can also be a U-shaped cavity body with an opening at a side face, and the shape of the connecting cavity is set according to the shape of the transfer pipe and the safety after installation. One end of the transfer pipe is connected with the rear connecting rod, at least two second pin holes are formed in the other end of the transfer pipe, the positions of at least two hole positions in the second pin holes can be aligned with the positions of the hole positions in the first pin hole, and the transfer pipe is inserted into the first pin hole and the second pin hole through bolts to achieve connection of the transfer pipe and the connecting pipe. When the dragging head is connected with the wheelchair, the transfer pipe is inserted into the connecting cavity of the connecting pipe, so that the first pin hole is aligned with the second pin hole, then the bolt is inserted, the end part of the bolt is limited by the pin column to avoid falling off, and therefore the dragging head and the wheelchair are quickly connected; when the wheelchair is needed to be used independently, the bolt is pulled out of the first pin hole and the second pin hole, the transfer pipe is taken out of the connecting cavity, so that the bolt and the transfer pipe are separated, and in order to facilitate the pulling out of the bolt, the end part of the bolt is also provided with a pull ring.

The bicycle head comprises a handle, an inner vertical pipe, an outer vertical pipe, a front fork and wheels, wherein the inner vertical pipe penetrates through the outer vertical pipe, the upper end of the inner vertical pipe is connected with the handle for holding, the lower end of the inner vertical pipe is connected with the front fork, and the tail end of the front fork is connected with the wheels; the inner vertical pipe can coaxially rotate relative to the outer vertical pipe in the outer vertical pipe; and a battery for providing a power supply is also fixed on the outer vertical pipe.

Furthermore, in order to facilitate the travelling and the supporting of the mop head, the mop head also comprises a foot support frame which comprises an adapter plate and two foot support legs, wherein one end of the adapter plate is rotationally connected to the frame through a rotating shaft, the rotational connection part forms an adapter point, the two foot support legs are symmetrically arranged at the two sides of the frame, one end of each foot support leg is fixed on the adapter plate, the other end of each foot support leg is connected with a small wheel which can be rotatably supported, a first tension spring connecting point is arranged on each foot support leg, a second tension spring connecting point is arranged on the frame, the first tension spring connecting point and the second tension spring connecting point are positioned on two sides of the switching point, and the first tension spring connecting point and the second tension spring connecting point are connected with a tension spring, the foot-supporting leg is connected with the frame through the tension spring, when the foot supporting leg rotates to the point where the first tension spring connecting point, the switching point and the second tension spring connecting point are positioned on the same straight line, the linear distance between the first tension spring connecting point and the second tension spring connecting point is greater than the length of the tension spring in a free state.

Force is applied to the foot-supporting legs, so that the foot-supporting legs can drive the adapter plate to rotate relative to the frame, and the foot-supporting legs can be put down and put away. When the foot support legs are put down, the small wheels are supported on the ground to support the dragging head, the dragging head is convenient to move, and the installation and the disassembly of the wheelchair are convenient to realize. At the moment, the foot-supporting leg winds to the rear side of the switching point, so that the tension spring is in a stretching state, and the stable support of the foot-supporting leg can be ensured. When the foot support legs are folded, the foot support legs are wound to the front side of the switching point, and the tension springs are still in a stretching state, so that the foot support legs can be ensured to be in a stable lifting state and cannot fall down in the advancing process.

Furthermore, in order to control the lifting angle of the foot support frame, a plurality of groups of limiting holes with different heights are formed in the adapter plate, limiting rods are arranged in the limiting holes, and when the foot support frame is folded, the limiting rods can be blocked on the frame to limit the lifting angle of the foot support frame. The foot support frame can be stably suspended on the frame under the combined action of the tension spring and the limiting rod.

A combined wheelchair comprises the dragging head and a wheelchair body, wherein the dragging head and the wheelchair body are connected through a quick assembly disassembly structure.

The utility model has the beneficial effects that: according to the electric push rod starting type monocycle towing head and the combined wheelchair, the connection between the frame and the head is adjusted by the angle adjusting mechanism, so that the inclination angle of the head is adjusted to meet the requirements of different people; the rapid mounting and dismounting between the towing head and the wheelchair are realized by adopting the rapid mounting and dismounting structure, and the adjustment of the distance between the towing head and the wheelchair is realized by adjusting the mounting position of the rapid mounting and dismounting structure on the wheelchair so as to adapt to the requirements of different heights and weights; the front wheel of the wheelchair is lifted in an electric mode, so that the operation is simple, and the time and the labor are saved.

Drawings

The utility model is further illustrated by the following figures and examples.

Fig. 1 is a schematic structural view of a general wheelchair.

Fig. 2 is a schematic structural view of the combination wheelchair.

FIG. 3 is a schematic view of the wheelchair with the front wheels at the front end thereof not raised.

FIG. 4 is a schematic view of the wheelchair with the front wheels raised at the front end.

Fig. 5 is a schematic perspective view of the mop head of the present invention (with the foot support in a retracted state).

Fig. 6 is a schematic structural view of the angle adjusting mechanism.

Fig. 7 is a schematic view of a transverse cross-sectional structure a-a of the angle adjusting mechanism.

Fig. 8 is a schematic structural view of the electric lifting mechanism.

Fig. 9 is a schematic view of the structure of the connection pipe.

Fig. 10 is a schematic structural view of the foot rest (the foot rest is in an open state).

In the figure: 100. the wheelchair comprises a towing head, 200 parts of a wheelchair body, 300 parts of a ground, 1 part of a vehicle head, 1-1 part of a handle, 1-2 parts of an inner vertical pipe, 1-3 parts of an outer vertical pipe, 1-4 parts of a front fork, 1-5 parts of a wheel, 2 parts of an electric lifting mechanism, 2-1 parts of an electric pushing cylinder, 2-11 parts of a cylinder body, 2-12 parts of a push rod, 2-2 parts of a vehicle frame, 2-21 parts of a front connecting rod, 2-22 parts of a rear connecting rod, 2-23 parts of an adjusting mechanism mounting hole, 2-24 parts of an ear seat, 2-3 parts of a quick dismounting structure, 2-31 parts of a bolt, 2-311 parts of a pull ring, 2-32 parts of a transit tube, 2-321 parts of a second pin hole, 2-33 parts of a connecting tube, 2-331 parts of a transverse tube, 2-332 parts of a longitudinal tube, 2-333 parts of a connecting cavity, 2-334 parts of a first pin hole, 2-34 parts of cross beam, 2-35 parts of pin, 2-36 parts of clamping plate, 3 parts of angle adjusting mechanism, 3-1 parts of rotating plate, 3-2 parts of vertical pipe hoop, 3-3 parts of first mounting position, 3-4 parts of second mounting position, 3-6 parts of first mounting position connecting screw, 3-7 parts of second mounting position connecting screw, 3-8 parts of hoop connecting screw, 4 parts of foot supporting frame, 4-1 parts of foot supporting leg, 4-2 parts of adapter plate, 4-3 parts of small wheel, 4-4 parts of tension spring, 4-5 parts of adapter point, 4-6 parts of first tension spring connecting point, 4-7 parts of second tension spring connecting point, 4-8 parts of limiting hole, 4-9 parts of limiting rod, 5 parts of front wheel, 6 parts of rear wheel, 7 parts of pedal frame, 8 parts of battery, 9 parts of controller, 10 parts of angle adjusting mechanism, and 3-1 parts of rotating plate, A controller box.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 2, the combined wheelchair of the utility model comprises a towing head 100 and a wheelchair body 200, wherein the towing head 100 and the wheelchair body 200 are connected through a quick-assembly-disassembly structure 2-3. The towing head 100 can automatically bring the wheelchair body 200 to travel, and before traveling, the front wheels 5 need to be lifted by the towing head 100 from the grounding state shown in fig. 3 to the suspension state shown in fig. 4.

As shown in fig. 5, the mop head 100 of the present invention is an electric push-rod activated wheelbarrow mop head 100, comprising a head 1, an electric lifting mechanism 2, an angle adjusting mechanism 3 and a foot support frame 4, wherein the head 1 is used for a user to hold, control direction, support and advance; the bicycle handlebar specifically comprises a handlebar 1-1, an inner vertical tube 1-2, an outer vertical tube 1-3, a front fork 1-4 and a wheel 1-5, wherein the inner vertical tube 1-2 penetrates through the outer vertical tube 1-3, the upper end of the inner vertical tube is connected with the handlebar 1-1 for holding, the lower end of the inner vertical tube is connected with the front fork 1-4, and the tail end of the front fork 1-4 is connected with the wheel 1-5; the inner vertical pipe 1-2 can coaxially rotate relative to the outer vertical pipe 1-3 in the outer vertical pipe 1-3; and a battery 8 for supplying power is also fixed on the outer vertical pipe 1-3. One end of the electric lifting mechanism 2 is detachably connected with the wheelchair, the other end of the electric lifting mechanism is connected with the vehicle head 1 through the angle adjusting mechanism 3, and one end of the wheelchair close to the electric lifting mechanism 2 can be lifted upwards to be in a suspended state through the deformation of the electric lifting mechanism 2; the electric lifting mechanism specifically comprises a frame 2-2, an electric push cylinder 2-1 and a quick assembly disassembly structure 2-3, and the specific structure of each part of the electric lifting mechanism 2 is described in detail later, and is not described again here. One end of the angle adjusting mechanism 3 is fixed on the vehicle head 1, the other end of the angle adjusting mechanism is provided with at least two first mounting positions 3-3 connected with the electric lifting mechanism 2, and the electric lifting mechanism 2 is fixed on different mounting positions so that the vehicle head 1 has different inclination angles in a vertical plane; the foot support frame 4 is arranged below the frame 2-2 of the electric lifting mechanism 2 and is used for advancing and supporting the mop head 100.

As shown in fig. 6 and 7, in order to adjust the inclination angle between the vehicle head 1 and the vehicle frame 2-2, the angle adjusting mechanism 3 includes a rotating plate 3-1 and a riser hoop 3-2, the rotating plate 3-1 may be one or more, in this embodiment, two rotating plates 3-1 are provided, and are oppositely and parallelly disposed in a vertical plane, the front connecting rod 2-21 of the vehicle frame 2-2 may be installed between the two rotating plates 3-1, and preferably, the end portion of the rotating plate 3-1 is circular arc-shaped, the first installation position 3-3 includes seven installation holes, the installation holes are circumferentially and uniformly arranged with the circle center of the circular arc-shaped end portion as the center, so that different installation holes of the first installation position 3-3 have different heights in the vertical plane, and in order to improve the stability of connection, the arrangement center of the first installation position 3-3 is provided with a second installation position 3-4, the second mounting locations 3-4 also employ mounting holes. The rotary plate 3-1 and the front connecting rod 2-21 are connected and locked by adopting the first mounting position connecting screw 3-6 and the second mounting position connecting screw 3-7 in the mounting holes of the first mounting position 3-3 and the second mounting position 3-4 respectively, the second mounting position connecting screw 3-7 can be used as a connecting shaft, and when the angle is adjusted, the front connecting rod 2-21 can be adjusted by only loosening the connection of the second mounting position 3-4 and rotating the front connecting rod 2-21 to different first mounting positions 3-3 around the second mounting position connecting screw 3-7. The other end of the rotating plate 3-1 is fixedly connected to an outer vertical pipe 1-3 of the vehicle head 1 through a vertical pipe hoop 3-2, and the connection between the rotating plate 3-1 and the vertical pipe hoop 3-2 and the locking between the vertical pipe hoop 3-2 and the outer vertical pipe 1-3 are realized by hoop connecting screws 3-8. The first mounting position 3-3 and the second mounting position 3-4 are adopted to realize fixed connection of two points, so that relative rotation between the frame 2-2 and the mounting plate is avoided. When the angle between the frame 2-2 and the vehicle head 1 is assembled, the angle is adjusted according to the requirements of customers, a proper installation position is selected to meet the requirement of an inclination angle, and after the position is selected and fixed, the position between the frame 2-2 and the vehicle head 1 is kept unchanged.

As shown in fig. 8, the electric lifting mechanism 2 comprises a vehicle frame 2-2, an electric push cylinder 2-1 and a quick dismounting structure 2-3, wherein the vehicle frame 2-2 comprises a front connecting rod 2-21 and a rear connecting rod 2-22, one end of the front connecting rod 2-21 is hinged with one end of the rear connecting rod 2-22 through an ear seat 2-24, and an adjusting mechanism mounting hole 2-23 for mounting a tension spring 4-4 and an adapter plate 4-2 is arranged on the rear connecting rod 2-22; the tail end of a cylinder body 2-11 of the electric push cylinder 2-1 is hinged on a front connecting rod 2-21 through an ear seat 2-24 fixed on the front connecting rod 2-21, a push rod 2-12 of the electric push cylinder 2-1 is hinged on a rear connecting rod 2-22 through an ear seat 2-24 fixed on the rear connecting rod 2-22, and an included angle formed between the front connecting rod 2-21 and the rear connecting rod 2-22 close to one side of the electric push cylinder 2-1 is smaller than 180 degrees, namely the electric push cylinder 2-1, the front connecting rod 2-21 and the rear connecting rod 2-22 enclose a deformable triangular structure; the front end of the front connecting rod 2-21 is connected with a rotating plate 3-1 of the angle adjusting mechanism 3, and one end of the rear connecting rod 2-22 far away from the front connecting rod 2-21 is provided with a quick dismounting structure 2-3 connected with the wheelchair. The front link 2-21 and the rear link 2-22 may be hollow tubular structures or solid structures, and in this embodiment, in order to reduce the overall weight, the hollow tubular structures are preferably used on the premise of ensuring the connection strength. In order to realize the control of the electric push cylinder 2-1, the electric push cylinder control system further comprises a controller 9, wherein the controller 9 is installed on the frame 2-2 through a controller box 10 and is connected with the battery 8 and the electric push cylinder 2-1 through a circuit, and the battery 8 supplies power to the controller 9 to realize the control of the electric push cylinder 2-1.

As shown in figure 8, the quick dismounting structure 2-3 comprises a bolt 2-31, a transit tube 2-32 and a connecting tube 2-33, a cross beam 2-34 is arranged between the left pedal frame and the right pedal frame 7 of the wheelchair body 200, two ends of the cross beam 2-34 are respectively fixedly connected to the pedal frames 7 through splints 2-36, the connecting tube 2-33 is fixedly connected to the cross beam 2-34 of the wheelchair, in the embodiment, as shown in figure 9, the connecting tube 2-33 comprises a hollow horizontal tube 2-331 and a vertical tube 2-332, the horizontal tube 2-331 and the vertical tube 2-332 are mutually vertical, the inner hole shape of the horizontal tube 2-331 is the same as that of the cross beam 2-34, the horizontal tube 2-34 is directly sleeved on the cross beam 2-34 and then locked through a pin 2-35 on the side surface, the vertical tube 2-332 is provided with a connecting cavity 2-333 for accommodating the transit tube 2-32, two first pin holes 2-334 are arranged on the side wall of the connecting cavity 2-333, and the first pin holes 2-334 are arranged along the longitudinal pipe 2-332; the longitudinal pipes 2-332 are positioned above the transverse pipes 2-331, and the connecting cavities 2-333 are U-shaped cavities with side openings and are matched with the rectangular structures of the intermediate transfer pipes 2-32. The middle rotating pipe 2-32 is a right-angle L-shaped bent pipe, one end of the middle rotating pipe is connected with the rear connecting rod 2-22 through a screw, the other end of the middle rotating pipe is provided with a plurality of second pin holes 2-321, and the distance between every two first pin holes 2-334 is integral multiple of the distance between every two adjacent second pin holes 2-321. The connection of the transit pipe 2-32 and the connection pipe 2-33 is realized by inserting the pin 2-31 into the first pin hole 2-334 and the second pin hole 2-321. When the mop head 100 is connected with a wheelchair, the transfer pipes 2-32 are inserted into the connecting cavities 2-333 of the connecting pipes 2-33, so that the first pin holes 2-334 and the second pin holes 2-321 are aligned, then the pins 2-31 are inserted, the ends of the pins 2-31 are limited by the pins to avoid separation, and therefore the quick connection of the mop head 100 and the wheelchair is realized; when the wheelchair is needed to be used independently, the bolt 2-31 is pulled out from the first pin hole 2-334 and the second pin hole 2-321, the transfer pipe 2-32 is taken out from the connecting cavity 2-333, so that the bolt 2-31 is separated from the connecting cavity 2-333, and the end part of the bolt 2-31 is also provided with a pull ring 2-311 for facilitating the pulling out of the bolt 2-31.

As shown in figure 10, the foot support frame 4 comprises an adapter plate 4-2 and two foot support legs 4-1, wherein one end of the adapter plate 4-2 is rotatably connected to the vehicle frame 2-2 through a rotating shaft, a rotating joint forms an adapter point 4-5, the two foot support legs 4-1 are symmetrically arranged at two sides of the vehicle frame 2-2, one end of the foot support leg 4-1 is fixed on the adapter plate 4-2, the other end is connected with a small wheel 4-3 capable of being rotatably supported, a first tension spring connecting point 4-6 is arranged on the foot support leg 4-1, a second tension spring connecting point 4-7 is arranged on the vehicle frame 2-2, the first tension spring connecting point 4-6 and the second tension spring connecting point 4-7 are positioned at two sides of the adapter point 4-5, and a tension spring 4-4 is connected to the first tension spring connecting point 4-6 and the second tension spring connecting point 4-7, the foot-supporting leg 4-1 is connected with the frame 2-2 through the tension spring 4-4, and when the foot-supporting leg 4-1 rotates until the first tension spring connecting point 4-6, the switching point 4-5 and the second tension spring connecting point 4-7 are positioned on a straight line, the straight line distance between the first tension spring connecting point 4-6 and the second tension spring connecting point 4-7 is larger than the length of the tension spring in a free state.

Force is applied to the foot-supporting leg 4-1, so that the foot-supporting leg 4-1 can drive the adapter plate 4-2 to rotate relative to the frame 2-2, and the foot-supporting leg 4-1 is put down and folded. When the foot-supporting leg 4-1 is put down, the small wheel 4-3 is supported on the ground 300, so that the mop head 100 can be supported, the movement of the mop head 100 is convenient, and the installation and the disassembly with the wheelchair are convenient. At the moment, the foot-supporting leg 4-1 winds to the rear side of the switching point 4-5, so that the tension spring 4-4 is in a stretching state, and the stable support of the foot-supporting leg 4-1 can be ensured. When the foot-supporting leg 4-1 is folded, the foot-supporting leg 4-1 winds to the front side of the switching point 4-5, and the tension spring 4-4 is still in a stretching state, so that the foot-supporting leg 4-1 can be ensured to be in a stable lifting state and can not fall down in the advancing process. In order to control the lifting angle of the foot support frame 4, a plurality of groups of limiting holes 4-8 with different heights are formed in the adapter plate 4-2, and limiting rods 4-9 are arranged in the limiting holes 4-8, in the embodiment, the limiting rods 4-9 can be directly screws, and when the foot support frame 4 is folded, the limiting rods 4-9 can be blocked on the frame 2-2 to limit the lifting angle of the foot support frame 4. The foot support frame 4 can be stably suspended on the frame 2-2 under the combined action of the tension spring 4-4 and the limiting rod 4-9.

In light of the foregoing description of preferred embodiments in accordance with the utility model, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides an electric pushing rod starts formula wheel barrow and drags head which characterized in that: the lifting device comprises a vehicle head, an electric lifting mechanism and an angle adjusting mechanism, wherein the vehicle head is used for being held, controlling the direction, supporting and advancing by a user; one end of the electric lifting mechanism is detachably connected with the wheelchair, the other end of the electric lifting mechanism is connected with the head of the wheelchair through the angle adjusting mechanism, and one end of the wheelchair close to the electric lifting mechanism can be lifted upwards to be in a suspended state through the deformation of the electric lifting mechanism; one end of the angle adjusting mechanism is fixed on the vehicle head, the other end of the angle adjusting mechanism is provided with at least two first installation positions connected with the electric lifting mechanism, and the electric lifting mechanism is fixed on different installation positions to enable the vehicle head to have different inclination angles.

2. The electric push-rod activated unicycle trailer of claim 1, wherein: the angle adjusting mechanism comprises a rotating plate and a vertical pipe hoop, the first installation positions are arranged at one end of the rotating plate, different first installation positions have different heights in a vertical plane, and the other end of the rotating plate is fixedly connected to an outer vertical pipe of the vehicle head through the vertical pipe hoop.

3. The electric push-rod activated unicycle trailer of claim 2, wherein: the two rotating plates are oppositely and parallelly arranged in the vertical plane, the end parts of the rotating plates are arc-shaped, and the first installation positions are uniformly distributed in the circumferential direction by taking the circle center of the arc-shaped end part as the center.

4. The electric push-rod activated unicycle trailer of claim 3, wherein: the front end of the frame of the electric lifting mechanism is connected to the second mounting position of the rotating plate through the connecting shaft.

5. The electric push-rod activated unicycle trailer of claim 1, wherein: the electric lifting mechanism comprises a frame and an electric pushing cylinder, the frame comprises a front connecting rod and a rear connecting rod, one end of the electric pushing cylinder is hinged to the front connecting rod, the other end of the electric pushing cylinder is hinged to the rear connecting rod, and an included angle formed between the front connecting rod and the rear connecting rod on one side close to the electric pushing cylinder is smaller than 180 degrees; and the front end of the front connecting rod is connected with the rotating plate of the angle adjusting mechanism, and one end of the rear connecting rod, which is far away from the front connecting rod, is provided with a quick dismounting structure connected with the wheelchair.

6. The electric push-rod activated unicycle trailer of claim 5, wherein: the quick assembly disassembly structure includes bolt, transfer pipe and connecting pipe, connecting pipe fixed connection is on the wheelchair, and still is equipped with the connection chamber that holds the transfer pipe on the connecting pipe, be equipped with two at least first pinholes on the lateral wall in connection chamber, transfer pipe one end is connected with the back connecting rod, is equipped with two at least second pinholes on the other end, just the position that has two at least hole sites in the second pinhole can be aimed at each other with the hole site position in the first pinhole, inserts the connection of realizing transfer pipe and connecting pipe in first pinhole and second pinhole through the bolt.

7. The electric push-rod activated unicycle trailer of claim 1, wherein: the bicycle head comprises a handle, an inner vertical pipe, an outer vertical pipe, a front fork and wheels, wherein the inner vertical pipe penetrates through the outer vertical pipe, the upper end of the inner vertical pipe is connected with the handle for holding, the lower end of the inner vertical pipe is connected with the front fork, and the tail end of the front fork is connected with the wheels; the inner vertical pipe can coaxially rotate relative to the outer vertical pipe in the outer vertical pipe; and a battery for providing a power supply is also fixed on the outer vertical pipe.

8. The electric push-stick activated unicycle trailer of any one of claims 1-7, wherein: still include the foot strut frame, the foot strut frame includes keysets and two foot-braces legs, and wherein, keysets one end is rotated through the pivot and is connected on the frame, rotates the junction and forms the changeover point, and two foot-braces leg symmetries set up the both sides at the frame, and foot-braces leg one end is fixed on the keysets, and the other end is connected the steamboat that can rotate the support, be equipped with first extension spring tie point on the foot-braces leg, be equipped with the second extension spring tie point on the frame, first extension spring tie point and second extension spring tie point are located the both sides of changeover point, and connect an extension spring on first extension spring tie point and the second extension spring tie point, when the foot-braces leg is rotatory to first extension spring tie point, changeover point and second extension spring tie point are located a straight line, and the linear distance between first extension spring tie point and the second extension spring tie point is greater than extension spring free state's length.

9. The electric push-rod activated unicycle trailer of claim 8, wherein: the adapter plate is provided with a plurality of groups of limiting holes with different heights, limiting rods are arranged in the limiting holes, and when the foot support frame is folded, the limiting rods can be blocked on the frame to limit the lifting angle of the foot support frame.

10. A combination wheelchair, which is characterized in that: comprising a tow head according to any of the claims 1-9, further comprising a wheelchair body, the tow head and the wheelchair body being connected by a quick-release construction.