CN220076454U

CN220076454U - Power-assisted trolley

Info

Publication number: CN220076454U
Application number: CN202321528237.8U
Authority: CN
Inventors: 颜秋波; 张文宇
Original assignee: Zhejiang Lera New Energy Power Technology Co Ltd
Current assignee: Zhejiang Lera New Energy Power Technology Co Ltd
Priority date: 2023-01-18
Filing date: 2023-06-15
Publication date: 2023-11-24
Anticipated expiration: 2033-06-15
Also published as: CN219969716U; CN220374551U; WO2024152579A1; CN219821486U; CN220009806U; CN219806849U; CN220009805U; CN219969717U; CN118804869A; CN219821485U

Abstract

The utility model discloses a power-assisted handcart which comprises a handcart body, a power supply unit and a driving unit, wherein the power supply unit is used for supplying power to the driving unit, the driving unit is used for driving a driving wheel of the handcart body to rotate, the driving unit comprises a driver, a connector and a transmission shaft, the transmission shaft is connected with the driving wheel, the connector is connected with the driver and the transmission shaft, the connector is suitable for establishing transmission connection with the driver when the driver operates, the driver is provided with a forward mode and a backward mode, and the driver is suitable for establishing different transmission directions with the connector respectively when the driver operates in the forward mode and the backward mode, so that the transmission shaft obtains different transmission directions.

Description

Power-assisted trolley

Technical Field

The utility model relates to the technical field of conveying devices and carrying devices, in particular to a power-assisted trolley.

Background

The trolley is widely applied to production and life, is convenient to operate, has light dead weight and is very convenient to load and transport objects in short distances. The initial cart is pushed and pulled manually, and is very laborious to push or pull by means of two hands for heavier objects or for places with steep gradients, and then the small-sized cart driven by electric power is arranged, so that the burden of workers can be effectively reduced, and the transportation efficiency is improved.

However, the existing power assisted trolley has the following defects: the power-assisted trolley can only automatically travel in one direction, and when the trolley is in a space and environment inconvenient to turn, the difficulty of the automatic travel for turning the trolley is high, and the trolley can only be pushed and pulled by manpower to travel.

Disclosure of Invention

It is an object of the present utility model to provide a power assisted cart having an automatic travel mode with multiple directions.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the power-assisted trolley comprises a trolley body, a power supply unit and a driving unit, wherein the power supply unit is used for supplying power to the driving unit, the driving unit is used for driving a driving wheel of the trolley body to rotate, the driving unit comprises a driver, a connector and a transmission shaft, the transmission shaft is connected with the driving wheel, the connector is connected with the driver and the transmission shaft, the connector is suitable for establishing transmission connection with the driver when the driver operates, the driver is provided with a forward mode and a reverse mode, and the driver is suitable for establishing different transmission directions with the connector when the driver operates in the forward mode and the reverse mode respectively so that the transmission shaft obtains different transmission directions.

As an improvement, a change-over switch is arranged on the vehicle body, the change-over switch is electrically connected with the driver, and the change-over switch is suitable for sending an action signal to the driver and controlling the driver to enter a forward mode or a reverse mode.

As an improvement, the action signal of the change-over switch comprises a forward signal and a reverse signal, and the driver is adapted to put the driver into a forward mode or a reverse mode when receiving the forward signal or the reverse signal.

As an improvement, the change-over switch comprises a first trigger state and a second trigger state, the change-over switch is adapted to transmit a forward signal in the first trigger state, the change-over switch is adapted to transmit a reverse signal in the second trigger state, and the change-over switch is adapted to switch between the first trigger state and the second trigger state.

Preferably, the change-over switch is a sliding switch, a toggle switch or a push switch.

Preferably, the vehicle body comprises an operating lever, a user is suitable for holding the handle end of the operating lever to push and pull the vehicle body, and the change-over switch is arranged on the handle end of the operating lever.

As an improvement, a self-propelled switch is arranged on the vehicle body, the self-propelled switch is electrically connected with the driver, and the self-propelled switch is suitable for sending a switching signal to the driver so as to enable the driver to operate or stop.

In a further development, the changeover switch is configured such that an actuation signal can be sent to the driver only when the self-propelled switch is on.

Preferably, the vehicle body comprises an operating lever, a user is suitable for holding the handle end of the operating lever to push and pull the vehicle body, and the self-propelled switch is arranged on the handle end of the operating lever.

Preferably, the vehicle body includes a frame and wheels, the frame being configured as a foldable structure; the wheels comprise a pair of front wheels and a pair of rear wheels which are arranged at two ends of the frame in the length direction; the rear wheel is the driving wheel, and the front wheel is the driven wheel; the frame is configured so that the front wheel, the rear wheel, and the driving unit do not interfere with each other when folded.

Preferably, the frame is configured such that, when folded, a front end surface of the driving unit does not protrude from a front end portion of the front wheel, and a rear end surface of the driving unit does not protrude from a rear end portion of the rear wheel.

Preferably, the driver comprises a motor, the coupler comprises a bidirectional clutch arranged on the transmission shaft, and the coupler is suitable for being in an engaged state to drive the driving wheel to transmit when the driver operates; when the driver stops rotating, the connector is in a separation state, transmission between the connector and the driving wheel is disconnected, and a user pushes and pulls the power-assisted trolley to operate through manpower.

Compared with the prior art, the utility model has the beneficial effects that:

1. the power-assisted trolley has the automatic travelling modes in multiple directions, and can switch the automatic travelling directions without turning the direction of the trolley when the automatic travelling direction of the trolley is required to be changed, so that the operation efficiency and the use convenience are improved, the trolley can obtain higher environmental adaptability, and more use scenes are met.

2. The power-assisted handcart disclosed by the utility model controls the travelling mode of the driver by arranging the change-over switch, and meanwhile, is also provided with the self-propelled switch and the change-over switch for operation linkage, and the handcart is simpler and easier to use and is not easy to operate by setting the operation logic between the self-propelled switch and the change-over switch.

Drawings

FIG. 1 is an overall structural view according to a preferred embodiment of the present utility model;

fig. 2 is a schematic view of the internal structure of a driving unit according to a preferred embodiment of the present utility model;

FIG. 3 is an overall structural view of the handle end of the lever according to a preferred embodiment of the present utility model;

fig. 4 is a schematic view showing a folded state of the power assisted cart according to a preferred embodiment of the present utility model.

In the figure: 1. a vehicle body; 11. a frame; 111. a chassis; 112. a side bracket; 113. a front bracket; 114. a rear bracket; 12. a wheel; 121. a front wheel; 122. a rear wheel; 13. an operation lever; 131. a handle end; 1311. a self-propelled switch; 1312. unlocking the switch; 1313. a speed regulating switch; 2. a driving unit; 21. a driver; 22. a coupler; 23. a transmission shaft; 3. and a power supply unit.

Detailed Description

The present utility model will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present utility model, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1 to 3, the present utility model provides a power-assisted cart, which comprises a cart body 1, a driving unit 2, and a power supply unit 3, wherein the power supply unit 3 is used for supplying power to the driving unit 2, and the driving unit 2 is used for driving at least one wheel 12 to rotate, so that the cart body 1 can advance or retract under the power assistance of the driving unit 2.

The handcart that relies on the manpower to pull with the tradition changes electric drive into, and the user only needs the advancing direction of control handcart when using, labour saving and time saving, the transportation of long distance and heavy object that carries out that can be more convenient, the ground of accessible different slopes, runs into steep hillside and also can easily deal with, has improved the use convenience.

The drive unit 2 comprises a drive 21, a coupling 22 and a drive shaft 23, the drive shaft 23 being connected to the drive wheel, the coupling 22 connecting the drive 21 and the drive shaft 23, the coupling 22 being adapted to establish a drive connection with the drive 21 when it is in operation, the drive 21 having a forward mode and a reverse mode, the drive 21 being adapted to establish different drive directions with the coupling 22 when it is in operation in the forward mode and the reverse mode, respectively, such that the drive shaft 23 obtains different drive directions.

The connector 22 can drive the driving wheel to rotate when the driver 21 runs, the driving wheel can freely move when the driver 21 stops, automatic running and manual pushing can be simultaneously realized, the connector 22 can also be connected with different running modes of the driver 21, so that the transmission direction of the driving wheel is changed, automatic running and automatic reversing of the handcart are realized, the handcart is matched with the automatic running and automatic reversing functions, the environmental adaptability can be greatly improved, more use scenes are met, for example, when the handcart is difficult to drive to move in the reversing direction by manpower in a space with the inconvenience of turning around, the driver 21 is switched to the reversing mode by switching at the moment, and the handcart can be easily poured out.

The vehicle body 1 is provided with a change-over switch, the change-over switch is electrically connected with the driver 21, the change-over switch is suitable for sending an action signal to the driver 21 and controlling the driver 21 to enter a forward mode or a backward mode, and the change-over switch is used for remotely controlling the operation mode of the driver 21, so that the mode of the driver 21 can be conveniently and timely switched.

The actuation signal of the switch comprises a forward signal and a reverse signal, the driver 21 being adapted to bring the driver 21 into a forward mode or a reverse mode upon receipt of the forward signal or the reverse signal, the switch being capable of sending different signals to the driver 21 to switch the driver 21 to the corresponding mode.

In some embodiments, the switch comprises a first trigger state and a second trigger state, the switch is suitable for transmitting a forward signal in the first trigger state, the switch is suitable for transmitting a backward signal in the second trigger state, the switch is suitable for switching between the first trigger state and the second trigger state, the switch can only have the first trigger state and the second trigger state, the operation complexity is prevented from being increased due to excessive states of the switch, and the switch only having the first trigger state and the second trigger state preferably uses a sliding switch or a toggle switch or a push switch.

The vehicle body 1 is provided with a self-propelled switch 1311, the self-propelled switch 1311 is electrically connected to the driver 21, the self-propelled switch 1311 is adapted to send a switching signal to the driver 21 so that the driver 21 is operated or stopped, the self-propelled switch 1311 is used for controlling the start and stop of the driver 21, the self-propelled function of the trolley is used more frequently, the self-propelled function of the trolley is separated from the forward and backward switching function, and the trolley can be prevented from moving in an incorrect direction due to incorrect operation.

The change-over switch is configured to send an action signal to the driver 21 when the self-propelled switch 1311 is turned on, thereby achieving a safety effect, effectively reducing the number of times the change-over switch is triggered, and improving the service life and the service stability of the change-over switch.

In the embodiment shown in fig. 2, the driver 21 includes a motor, the coupler 22 includes a bi-directional clutch disposed on the transmission shaft 23, the coupler 22 is adapted to be in an engaged state to drive the driving wheel when the driver 21 is running, and to be in a disengaged state when the driver 21 is stopped, the coupler 22 can be automatically separated from the driver 21 to disconnect the transmission with the driving wheel, so that the wheel 12 can freely rotate, and thus be pushed by an external force, a user can push and pull by manpower to drive the power-assisted cart to run, and the bi-directional clutch has the function of being capable of engaging with the motor and driving in a corresponding direction regardless of forward rotation or reverse rotation of the motor.

The vehicle body 1 comprises a frame 11, wheels 12 and an operating rod 13, wherein the frame 11 is provided with a containing space for containing objects, the wheels 12 are arranged at the bottom of the frame 11, the operating rod 13 is arranged at one end of the frame 11, when a user uses the vehicle body, the objects are placed in the frame 11, and the driving unit 2 drives the wheels 12 to drive the frame 11 to move by pulling the operating rod 13, so that the object carrying purpose is realized.

It should be noted that the vehicle body 1 may further include a fabric layer (not shown in the drawings) disposed on the frame 11, where the accommodating space of the vehicle body 1 is defined by the frame 11 and the fabric layer, and the fabric layer is disposed to facilitate the weight reduction of the vehicle body 1 and improve the accommodating capacity of the vehicle body 1, so that an object placed in the fabric layer is not easy to fall out of the vehicle body 1 through the frame 11.

In some embodiments, the frame 11 is rectangular, is a foldable frame 11, and can be folded for storage after use, so that the occupied space of the electric cart is reduced.

The frame 11 includes a chassis 111, side brackets 112 positioned at both sides of the chassis 111, and front and rear brackets 113 and 114 coupled to the chassis 111 and the side brackets 112, the chassis 111 includes front and rear plates rotatably coupled, the front bracket 113 is rotatably coupled to the front plate, the rear bracket 114 is rotatably coupled to the rear plate, two side brackets 112 are disposed at both sides of the chassis 111, and both ends are respectively coupled to the front and rear brackets 113 and 114, the chassis 111 and the side brackets 112 cooperate to form a receiving space for receiving an object, the front and rear brackets 113 and 114 are non-foldable, and the chassis 111 and the side brackets 112 are configured to be folded.

When folding is required, the front bracket 113 and the rear bracket 114 are close to each other, the junction of the front and rear plates is rotated to be close to each other, and the side brackets 112 are rotated to be deformed at the hinge, so that the frame 11 can be folded together.

It should be noted that the specific structure of the foldable frame 11 may be selected in many ways, and all the frames 11 that can be folded to achieve the volume reduction are within the scope of the present utility model.

The number of the wheels 12 is at least three, two wheels 12 are in a group, two wheels 12 of each group are arranged at intervals along the width direction of the frame 11, if the number of the wheels 12 is odd, the last wheel 12 is in a group alone, each group of wheels 12 is arranged in parallel along the length direction of the frame 11, wherein one group of wheels 12 or a plurality of groups of wheels 12 closest to the operating rod 13 are universal wheels, the vehicle body 1 is guided to change direction along with the external force applied to the operating rod 13 by a user, and the driving unit 2 drives at least one wheel 12 in the other groups to rotate.

In the embodiment shown in fig. 1 and 4, the wheel 12 includes a pair of front wheels 121 and a pair of rear wheels 122, the pair of front wheels 121 being disposed at a front end of the chassis 111 at intervals, and the pair of rear wheels 122 being disposed at a rear end of the chassis 111 at intervals.

In some embodiments, the frame 11 is configured so that when folded, the front wheel 121, the rear wheel 122, and the drive unit 2 do not interfere with each other. The driving unit 2 is prevented from being collided, and the use safety is improved.

It should be noted that, when the frame 11 is configured to be folded, the front end surface of the driving unit 2 does not protrude from the front end portion of the front wheel 121, and the rear end surface of the driving unit 2 does not protrude from the rear end portion of the rear wheel 122. By means of the arrangement, after the power-assisted trolley is folded, the front end face and the rear end face of the driving unit 2 are not exposed out of the wheels 12, the driving unit 2 is prevented from being collided, and the service life of the power-assisted trolley is prolonged.

In some embodiments, a pair of rear wheels 122 are connected by a transmission shaft 23, and the driving unit 2 drives the transmission shaft 23 to rotate so that the rear wheels 122 are rotationally advanced, and the transmission shaft 23 and the rear wheels 122 are connected in a manner of the related art, which is not described herein.

The operation lever 13 may be provided at the front end of the frame 11 or may be provided at the rear end of the frame 11, and in the embodiment shown in fig. 1, the operation lever 13 is provided at the front end of the frame 11 with the operation lever 13 hinged to the front rail.

The operating lever 13 is hinged to the frame 11 so that the operating lever 13 can rotate between its initial position and a push-pull position.

The handle end 131 is arranged on the operating rod 13, a user can hold the handle end 131 to push and pull the car body 1, the handle end 131 is of an annular structure, fingers of the user can penetrate through the handle end 131 to hold, the operating feeling is improved, and the push and pull difficulty is reduced.

In some embodiments, the switch is disposed on the handle end 131.

In the embodiment shown in fig. 3, the self-propelled switch 1311 is disposed on the handle end 131, the self-propelled switch 1311 may be configured to be turned on when pressed by an external force, turned off when pressed without an external force, and the self-propelled switch 1311 is disposed inside the annular upper portion of the handle end 131, and when the user holds the handle end 131, the palm or four fingers of the user are adapted to operate the self-propelled switch 1311.

The self-propelled switch 1311 is configured in such a way that it is connected only by the user's continued pressure, further ensuring the safety of the user using the power-assisted cart, avoiding situations where the user is accidentally released but the cart is still continuously advancing for some reason.

The handle 131 may further be provided with an unlock switch 1312, where the unlock switch 1312 is configured to unlock the self-walking switch 1311 when pressed, so that the self-walking switch 1311 may be pressed, and when the unlock switch 1312 is not pressed by an external force, the self-walking switch 1311 will be locked and cannot be turned on, and the configurations of the self-walking switch 1311 and the unlock switch 1312 are conventional and will not be described in detail herein.

In some embodiments, the unlock switch 1312 is disposed outside the annular upper portion of the grip end 131, when the user holds the grip end 131, the user's thumb is adapted to operate the unlock switch 1312, and typically the unlock switch 1312 is configured as a push switch that is turned on before the power-assisted cart is used and turned off after the power-assisted cart is used, so that it is disposed on the side of the grip end 131 near the user's thumb, and when the user holds the grip end 131, the user's thumb conveniently operates the unlock switch 1312, which is more convenient for the user to operate with one hand, and the holding posture does not need to be changed, and the operation has continuity.

In some embodiments, the handle end 131 is further provided with a speed regulating switch 1313 for regulating the rotational speed of the drive unit 2. The speed of movement of helping hand handcart can be adjusted for user's use is more convenient, if meet the route that is even and does not have the barrier and can travel fast, and barrier or pedestrian are more, when the road surface is uneven need reduce the speed of movement, in order to ensure user's safety, also meet the condition of going up the slope, can increase the speed, increase output with safe transportation going up the slope.

The speed regulating switch 1313 is disposed on the inner side of the annular portion of the handle end 131, and the speed regulating switch 1313 is opposite to the self-propelled switch 1311, so that the user can hold the handle end 131, the palm of the user continuously presses the self-propelled switch 1311, and at least one finger of the user can stretch to toggle the speed regulating switch 1313, so that the user can turn on, lock and regulate the speed completely through one hand, the setting is humanized, the general use habit of the user is met, and the other hand of the user is liberated.

In some preferred embodiments, the speed regulating switch 1313 is configured as a rolling stepless speed regulating switch 1313, and the rolling direction of the speed regulating switch is consistent with the holding direction of the user, so that the user can conveniently and simply regulate the operation speed of the power-assisted trolley at any time in the holding process, and the convenience and safety of use are improved.

When the power-assisted trolley is used by a user, the stop and start of the power-assisted trolley can be controlled by using only one hand, the other hand of the user is liberated, and when the user uses the power-assisted trolley for transportation, the idle hand can be used for making a call or looking at map to guide and other operations, so that the operability and convenience of the power-assisted trolley are improved.

The driving unit 2 and the power supply unit 3 are positioned on different sides of the frame 11, so that the driving unit 2 and the power supply unit 3 are prevented from interfering with each other, the vehicle body 1 can be balanced, and the design is more convenient.

The power supply unit 3 is arranged on the outer side surface of the front support 113 and is close to the top of the front support 113, so that the power supply unit 3 can be used by a user more conveniently, and the user does not need to bend down to operate or replace the power supply unit 3, thereby saving more labor and relaxing.

The power-assisted trolley is provided with the detachable and separable battery pack, so that the battery pack can be separated from the trolley body 1 to be charged independently, the power-assisted trolley is prevented from being moved indoors during charging, the waste of manpower is reduced, and the time is saved; meanwhile, the standby battery pack is conveniently used, and the battery pack can conveniently supply power to other similar machines, so that the outdoor transportation and the activities are greatly facilitated.

The foregoing has outlined the basic principles, features, and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a helping hand handcart, includes automobile body, power supply unit and drive unit, power supply unit is used for to the power supply of drive unit, drive unit is used for the drive wheel rotation of automobile body, its characterized in that:

the drive unit comprises a drive, a coupling and a transmission shaft, the transmission shaft is connected with the drive wheel, the coupling is connected with the drive and the transmission shaft, the coupling is suitable for establishing transmission connection with the drive when the drive operates, the drive is provided with a forward mode and a reverse mode, and the drive is suitable for establishing different transmission directions with the coupling when the drive operates in the forward mode and the reverse mode respectively, so that the transmission shaft obtains different transmission directions.

2. A power assisted cart as in claim 1 wherein: the vehicle body is provided with a change-over switch, the change-over switch is electrically connected with the driver, and the change-over switch is suitable for sending an action signal to the driver and controlling the driver to enter a forward mode or a reverse mode.

3. A power assisted cart as in claim 2 wherein: the actuation signal of the switch comprises a forward signal and a reverse signal, and the driver is adapted to cause the driver to enter a forward mode or a reverse mode upon receipt of the forward signal or the reverse signal.

4. A power assisted cart according to claim 3, wherein: the switch comprises a first trigger state and a second trigger state, the switch is suitable for transmitting a forward signal in the first trigger state, the switch is suitable for transmitting a reverse signal in the second trigger state, and the switch is suitable for switching between the first trigger state and the second trigger state.

5. A power assisted cart as in claim 4 wherein: the change-over switch is a sliding switch or a toggle switch or a push switch.

6. A power assisted cart as in claim 2 wherein: the vehicle body comprises an operating rod, a user is suitable for holding the handle end of the operating rod to push and pull the vehicle body, and the change-over switch is arranged on the handle end of the operating rod.

7. A power assisted cart as in claim 2 wherein: the self-propelled switch is electrically connected with the driver, and is suitable for sending a switch signal to the driver so as to enable the driver to operate or stop.

8. A power assisted cart as in claim 7 wherein: the change-over switch is configured to send an action signal to the driver only when the self-propelled switch is turned on.

9. A power assisted cart as in claim 8 wherein: the self-propelled switch is arranged on the handle end of the operating rod.

10. A power assisted cart as in claim 1 wherein: the vehicle body includes a frame and wheels, the frame being configured as a collapsible structure; the wheels comprise a pair of front wheels and a pair of rear wheels which are arranged at two ends of the frame in the length direction; the rear wheel is the driving wheel, and the front wheel is the driven wheel; the frame is configured so that the front wheel, the rear wheel, and the driving unit do not interfere with each other when folded.

11. A power assisted cart according to claim 10, wherein: the frame is configured so that, when folded, a front end surface of the drive unit does not protrude from a front end portion of the front wheel, and a rear end surface of the drive unit does not protrude from a rear end portion of the rear wheel.

12. A power assisted cart according to any one of claims 1 to 11, wherein: the driver comprises a motor, the connector comprises a bidirectional clutch arranged on the transmission shaft, and the connector is suitable for being in a meshing state to drive the driving wheel to transmit when the driver runs; when the driver stops rotating, the connector is in a separation state, transmission between the connector and the driving wheel is disconnected, and a user pushes and pulls the power-assisted trolley to operate through manpower.