CN220076452U

CN220076452U - Power-assisted carrier

Info

Publication number: CN220076452U
Application number: CN202321418635.4U
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: 2023-06-05
Filing date: 2023-06-05
Publication date: 2023-11-24
Anticipated expiration: 2033-06-05

Abstract

The utility model discloses a power-assisted carrier, which comprises a carrier body, a driving unit and a power supply unit, wherein the power supply unit is used for supplying power to the driving unit, the carrier body comprises a foldable frame and a plurality of wheels arranged at the bottom of the frame, the driving unit is used for driving the wheels to rotate, the driving unit comprises a driver and a transmission shaft, the driver is in transmission connection with driving wheels arranged at two ends of the transmission shaft through the transmission shaft, the transmission shaft comprises at least two mutually-jointed support shafts, the support shafts are suitable for being mutually separated, so that the transmission connection between the driver and the driving wheels is disconnected.

Description

Power-assisted carrier

Technical Field

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

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 conventional power-assisted vehicle has the following drawbacks: the drive wheel is connected with the driver through a whole transmission shaft, the transmission shaft can interfere the disassembly and assembly of the drive wheel, the drive wheel and the driver can be separated only by disassembling the drive wheel together with the driver when the drive wheel is disassembled and replaced, the process is complicated, the driver is easy to damage due to improper operation.

Disclosure of Invention

The utility model aims to provide a power-assisted type carrier capable of conveniently and quickly assembling and disassembling driving wheels.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a helping hand formula carrier, includes automobile body, drive unit and power supply unit, power supply unit be used for to the drive unit power supply, the automobile body includes folding frame, sets up a plurality of wheels of frame bottom, drive unit is used for the drive the wheel rotates, drive unit includes driver and transmission shaft, the driver pass through the transmission shaft with set up in the drive wheel transmission at transmission shaft both ends is connected, the transmission shaft includes two piece at least fulcrum of interengagement, be suitable for the mutual separation between the fulcrum, so that the disconnection the driver with drive between the drive wheel links.

As an improvement, the transmission shaft is provided with a shaft sleeve, and the two support shafts are suitable for being coaxially inserted into two ends of the shaft sleeve.

As an improvement, the sleeve and the support shafts are kept fixed to each other in the circumferential direction, and the sleeve is adapted to rotate the two support shafts synchronously.

As an improvement, a first inserting hole is formed in one end, inserted into the shaft sleeve, of the support shaft, a second inserting hole is formed in the shaft sleeve, and a fastener is arranged between the first inserting hole and the second inserting hole in a penetrating mode.

Preferably, the first plugging hole is a threaded hole, and the fastener is a bolt.

As an improvement, the first insertion hole is formed along the radial direction of the support shaft, and the second insertion hole is formed along the radial direction of the shaft sleeve.

As an improvement, the fulcrum shaft is provided with mutually matched scarf structures on an outer ring surface of one end of the shaft sleeve and an inner ring surface of the shaft sleeve, so that the fulcrum shaft and the shaft sleeve are mutually fixed in the circumferential direction.

As an improvement, the ends of the two support shafts are provided with mutually matched scarf structures, so that the two support shafts are connected in a matched mode inside the shaft sleeve and fixed with each other in the circumferential direction.

As an improvement, the separation point between the two fulcrum shafts is exposed to the outside of the driver.

As an improvement, the sleeve is exposed to the outside of the driver.

Preferably, the transmission shaft comprises three support shafts, the three support shafts are connected through shaft sleeves, and the three support shafts are suitable for being separated from each other.

As a modification, the separation points of the three fulcrum shafts are exposed to the outside of the driver and located on both sides of the driver.

As an improvement, the wheel includes a pair of front wheels and a pair of rear wheels provided at both ends in the longitudinal direction of the frame, the rear wheels being the driving wheels; the frame is configured such that, when folded, a front end surface of the driver does not protrude from a front end portion of the front wheel, and a rear end surface of the driver does not protrude from a rear end portion of the rear wheel.

As a refinement, the frame is configured such that when folded, the front wheel at least partially overlaps the rear wheel.

Compared with the prior art, the utility model has the beneficial effects that: the transmission shaft of the power-assisted carrier is of a separated design, the transmission connection between the driver and the driving wheel can be disconnected through the separation of the support shaft, and compared with the design of the transmission shaft which cannot be disconnected, the separated design can be used for rapidly disassembling and maintaining the driving wheel without disassembling the driver, so that the replacement of the driving wheel is convenient, the difficulty of disassembling and assembling the driving wheel is reduced, the convenience of disassembling and assembling is improved, and the maintenance is easier.

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 a connection structure of a driving unit and a driving wheel according to a preferred embodiment of the present utility model;

fig. 3 is an exploded view showing a connection structure of a driving unit and a driving wheel according to a preferred embodiment of the present utility model;

FIG. 4 is a schematic illustration of the connection of a connecting shaft to a sleeve according to a preferred embodiment of the present utility model;

FIG. 5 is a schematic illustration of the connection of a connecting shaft to a sleeve according to another preferred embodiment of the present utility model;

fig. 6 is a schematic view of the connection of a drive shaft according to still another preferred embodiment of the present utility model when three support shafts are engaged.

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 driving wheel; 13. an operation lever; 131. a handle end; 2. a driving unit; 21. a driver; 22. a transmission shaft; 221. a support shaft; 2211. a first plug hole; 222. a shaft sleeve; 2221. a second plug hole; 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 6, the present utility model provides a power-assisted carrier, which comprises a vehicle 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 to rotate, so that the vehicle body 1 can advance or retreat 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.

In the embodiment shown in fig. 1 to 3, the driving unit 2 includes a driver 21 and a driving shaft 22, the driver 21 is in driving connection with the driving wheels 12 disposed at two ends of the driving shaft 22 through the driving shaft 22, the driving shaft 22 includes at least two mutually engaged supporting shafts 221, the supporting shafts 221 are adapted to be separated from each other, so as to disconnect the driving connection between the driver 21 and the driving wheels 12, the separated design of the driving shaft 22 can promote the degree of freedom of installation between the driver 21 and the driving wheels 12, the installation sequence between the driver 21, the driving wheels 12 and the driving shaft 22 can be freely selected, and compared with the design of the driving shaft 22 which cannot be disconnected, the separated design can facilitate the rapid disassembly and maintenance of the driving wheels 12, reduce the disassembly difficulty, and promote the convenience and efficiency of disassembly and assembly.

The shaft 22 is provided with a shaft sleeve 222, two support shafts 221 are suitable for being coaxially inserted into two ends of the shaft sleeve 222, the support shafts 221 are guided, connected and fixed through the shaft sleeve 222, the connection strength between the support shafts 221 is improved, and disconnection between the support shafts 221 is avoided.

The shaft sleeve 222 and the support shafts 221 are circumferentially fixed with each other, the shaft sleeve 222 is suitable for enabling the two support shafts 221 to synchronously rotate, the shaft sleeve 222 can improve the connection stability between the support shafts 221, the power transmitted to the driving wheel 12 by the two support shafts 221 connected with the shaft sleeve 222 is kept consistent, and the phenomena of insufficient power, slipping and the like of the driving wheel 12 on one side are avoided.

In the embodiment shown in fig. 3, a first insertion hole 2211 is formed at one end of the support shaft 221 inserted into the shaft sleeve 222, a second insertion hole 2221 is formed in the shaft sleeve 222, a fastener is penetrated and connected between the first insertion hole 2211 and the second insertion hole 2221, and the fastener preferably uses a universal fastener, so that positioning connection between the support shaft 221 and the support shaft 221 can be realized by fixing the first insertion hole 2211 and the second insertion hole 2221 in a matching manner.

It should be noted that, the second plug holes 2221 may be symmetrically formed on two sides of the shaft sleeve 222, and after the fastener sequentially passes through the second plug holes 2221 on one side of the shaft sleeve 222 and the first plug holes 2211 of the supporting shaft 221, the fastener can be penetrated out from the second plug holes 2221 on the other side of the shaft sleeve 222, so as to realize multi-stage fastening connection, so that the fastener can generate stronger fastening effect on the shaft sleeve 222 and the supporting shaft 221, promote shearing force resistance of the fastener, and avoid deformation and damage of the fastener caused by too strong torsion between the shaft sleeve 222 and the supporting shaft 221.

In the embodiment shown in fig. 4, the first insertion hole 2211 is radially opened along the support shaft 221, the second insertion hole 2221 is radially opened along the shaft sleeve 222, and the first insertion hole 2211 and the second insertion hole 2221 are radially opened to facilitate the mating and insertion of the fastener, so that the shaft sleeve 222 can fix the support shafts 221 at two ends in a smaller volume.

In some embodiments, the first insertion hole 2211 is preferably a threaded hole, the fastener is preferably a bolt, the second insertion hole 2221 may not be provided with threads, it is noted that the inner diameter of the second insertion hole 2221 needs to be the same as the outer diameter of the bolt, and after the fastener passes through the second insertion hole 2221 and is in threaded connection with the first insertion hole 2211, the fastener can perform a fit limit on the second insertion hole 2221, so as to prevent the sleeve 222 from performing a circumferential movement relative to the support shaft 221.

In some embodiments, the external ring surface of one end of the fulcrum 221, which is deep into the shaft sleeve 222, and the internal ring surface of the shaft sleeve 222 are provided with mutually matched scarf structures, so that the fulcrum 221 and the shaft sleeve 222 are mutually fixed in the circumferential direction, the scarf structures between the fulcrum 221 and the shaft sleeve 222 can help the fulcrum 221 and the shaft sleeve 222 to be circumferentially fixed, the fasteners can help the fasteners to share the torsional shearing force applied to the fulcrum 221 and the shaft sleeve 222, and the structural stability is improved.

In the embodiment shown in fig. 5, the end portions of the two support shafts 221 are provided with mutually matched scarf structures, so that the two support shafts 221 are connected in a matched manner inside the shaft sleeve 222 and are mutually fixed in the circumferential direction, the scarf structures are arranged between the two support shafts 221 to enable positioning connection between the two support shafts, the two support shafts 221 can keep synchronous rotation, the fasteners are helped to share the torsional shearing force received by the fasteners, the structural stability is improved, and the section of the scarf structures on the axis perpendicular to the shaft sleeve 222 is preferably polygonal, so that a limiting fixing effect can be generated in the circumferential direction.

It should be noted that, the separation point between the two support shafts 221 is exposed to the outside of the driver 21, and the opposite shaft sleeve 222 should also be exposed to the outside of the driver 21, so as to facilitate the operation of dismounting and fixing the support shafts 221 and the shaft sleeve 222.

In the embodiment shown in fig. 6, the transmission shaft 22 is formed by joining three support shafts 221, the three support shafts 221 are joined by a shaft sleeve 222, the three support shafts 221 are suitable for being separated from each other, the separation points of the three support shafts 221 are exposed outside the driver 21 and are positioned at two sides of the driver 21, and the three support shafts 221 can be designed to correspondingly connect the two driving wheels 12 and the driver 21 respectively, so that the transmission connection between the two driving wheels 12 and the driver 21 can be freely disconnected and connected, the degree of freedom is higher, and the disassembly and assembly operation are simpler and more convenient.

The automobile body 1 includes frame 11, wheel and action bars 13, and frame 11 has the accommodation space that holds the object, and the wheel sets up in the bottom of frame 11, and action bars 13 set up in the one end of frame 11, and the user is when using, places the object in frame 11 inside, pulls action bars 13 and makes driving unit 2 drive wheel drive frame 11 remove to realize the purpose of handling the object.

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 wheels is at least three, two wheels of each group are a set, two wheels of each group are arranged at intervals along the width direction of the frame 11, if the number of wheels is odd, the last wheel is a set alone, each group of wheels is arranged in parallel along the length direction of the frame 11, wherein one group of wheels or a plurality of groups of wheels 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 of the other groups to rotate.

In the embodiment shown in fig. 1, the wheels include a pair of front wheels disposed at a front end of the chassis 111 at intervals, and a pair of rear wheels disposed at a rear end of the chassis 111 at intervals.

In some embodiments, a pair of rear wheels are connected by a propeller shaft 22, and the drive unit 2 drives the propeller shaft 22 to rotate so that the rear wheels rotate forward.

When the frame 11 is folded, the front end surface of the driver 21 does not protrude from the front end of the front wheel, and the rear end surface of the driver 21 does not protrude from the rear end of the rear wheel, so that the driver 21 is hidden in the front wheel and the rear wheel, and collision damage between the driver 21 and an external object is avoided.

When the frame 11 is configured to be folded, the front wheels and the rear wheels are at least partially overlapped, so that the folding volume of the handcart can be reduced, and the handcart is convenient to carry and place.

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.

When the power-assisted type carrier is used by a user, the stop and the start of the hand cart can be controlled by using only one hand, the other hand of the user is liberated, and when the user uses the power-assisted type carrier 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 type carrier 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 disposed on the outer side surface of the front bracket 113 and is close to the top of the front bracket 113, so that the use of a user can be facilitated, and the user can be prevented from bending down when the battery pack is plugged and unplugged.

The power-assisted type carrier is provided with the detachable and separable battery pack, so that the battery pack can be separated from the vehicle body 1 to be charged independently, the power-assisted type carrier 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 formula carrier, includes automobile body, drive unit and power supply unit, power supply unit be used for to the power supply of drive unit, the automobile body includes folding frame, sets up a plurality of wheels of frame bottom, drive unit is used for the drive the wheel rotates, its characterized in that:

the driving unit comprises a driver and a transmission shaft, the driver is in transmission connection with driving wheels arranged at two ends of the transmission shaft through the transmission shaft, the transmission shaft comprises at least two mutually-jointed support shafts, and the support shafts are suitable for being mutually separated, so that transmission connection between the driver and the driving wheels is disconnected.

2. A power assisted vehicle as claimed in claim 1, wherein: the transmission shaft is provided with a shaft sleeve, and the two support shafts are suitable for being coaxially inserted into two ends of the shaft sleeve.

3. A power assisted vehicle as claimed in claim 2, wherein: the shaft sleeve and the support shafts are kept fixed with each other in the circumferential direction, and the shaft sleeve is suitable for enabling the two support shafts to synchronously rotate.

4. A power assisted vehicle as claimed in claim 3, wherein: the support shaft is inserted into one end of the shaft sleeve, a first inserting hole is formed in the shaft sleeve, a second inserting hole is formed in the shaft sleeve, and a fastener is connected between the first inserting hole and the second inserting hole in a penetrating mode.

5. The power assisted vehicle of claim 4, wherein: the first plug hole is a threaded hole, and the fastener is a bolt.

6. The power assisted vehicle of claim 4, wherein: the first plug holes are formed along the radial direction of the support shaft, and the second plug holes are formed along the radial direction of the shaft sleeve.

7. A power assisted vehicle as claimed in claim 3, wherein: the fulcrum shaft is provided with mutually matched scarf joint structures on an outer annular surface of one end of the fulcrum shaft penetrating into the shaft sleeve and an inner annular surface of the shaft sleeve, so that the fulcrum shaft and the shaft sleeve are mutually fixed in the circumferential direction.

8. A power assisted vehicle as claimed in claim 2, wherein: the end parts of the two support shafts are provided with mutually matched scarf joint structures, so that the two support shafts are connected in a matched mode in the shaft sleeve and fixed with each other in the circumferential direction.

9. A power assisted vehicle according to any one of claims 1 to 8, wherein: the separation point between the two fulcrum shafts is exposed to the outside of the driver.

10. A power assisted vehicle according to any one of claims 2 to 8, wherein: the sleeve is exposed to the exterior of the driver.

11. A power assisted vehicle according to any one of claims 1 to 8, wherein: the transmission shaft comprises three support shafts which are connected through shaft sleeves, and the three support shafts are suitable for being separated from each other.

12. A power assisted vehicle as claimed in claim 11, wherein: the separation points of the three support shafts are exposed to the outside of the driver and are positioned on both sides of the driver.

13. A power assisted vehicle according to any one of claims 1 to 8, wherein: 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, and the rear wheels are driving wheels; the frame is configured such that, when folded, a front end surface of the driver does not protrude from a front end portion of the front wheel, and a rear end surface of the driver does not protrude from a rear end portion of the rear wheel.

14. The power assisted vehicle of claim 13, wherein: the frame is configured to at least partially overlap the front wheel and the rear wheel when folded.