CN216185392U

CN216185392U - Hand cart

Info

Publication number: CN216185392U
Application number: CN202122528648.4U
Authority: CN
Inventors: 王尧尧
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-04-05
Anticipated expiration: 2031-10-20

Abstract

The utility model provides a handcart, which relates to the technical field of garden tools and comprises: a vehicle body assembly; the driving wheel is connected to the vehicle body assembly through a wheel shaft and can rotate around the wheel shaft; the power assembly is fixed in a hub of the driving wheel and drives the driving wheel to rotate; the brake assembly is arranged on the driving wheel to realize braking on the driving wheel; the control device is fixed on the vehicle body assembly and is electrically connected with the power assembly and the brake assembly; the brake assembly includes: the first brake component is fixed at the driving wheel to realize braking on the driving wheel; the second brake component is fixed on a push rod of the vehicle body assembly and is connected with the first brake component through a pull cable, and the second brake component is electrically connected with the control device through a signal wire; when the brake assembly is in a braking state, the control connection between the control device and the power assembly is disconnected. The utility model solves the problem that the brake mechanism and the driving device simultaneously operate when the handcart is braked in the prior art.

Description

Hand cart

Technical Field

The utility model relates to the technical field of garden tools, in particular to a trolley.

Background

The trolley is a relatively frequent and indispensable tool used in life, and is mainly used for transporting goods at short distance; in modern life, various trolleys are needed, such as sheets, covers and sundries used for carrying leftovers or changing and washing residents by service personnel in hotels, and yellow sand, cement, bricks and the like used for carrying workers on construction sites, and the trolleys greatly facilitate our lives.

At present, the trolley on the market is generally composed of a trolley hopper, a trolley body bracket, a push rod, universal wheels and other parts, but a part of the existing trolleys on the market have no brake mechanism; when the handcart is used in certain scenes in life, for example, when a user runs down or falls carelessly when the handcart is loaded with heavy objects on a sloping road, or the battery pack is low in power or meets a acquaintance to loosen the handcart unintentionally during the chatting process, the handcart can slide back out of control, and damage is caused to property and personal safety.

In addition, another part of the existing trolleys on the market contain a brake mechanism, when the brake mechanism of the traditional trolley is applied to the electric trolley, no control device is arranged between the brake mechanism and the driving device for regulation and control, the brake mechanism and the driving device can be operated at the same time, the brake performance of the brake mechanism is greatly reduced, and in the serious case, the brake mechanism can be out of work, serious accidents occur, and injuries are caused to property and personal safety.

In view of the above, there are improvements to the prior art carts.

SUMMERY OF THE UTILITY MODEL

In view of the above disadvantages of the prior art, the present invention provides a cart for solving the problem that when the cart in the prior art is braked, the brake mechanism and the driving device operate simultaneously, so that the brake performance of the brake mechanism is greatly reduced, and even the brake fails, and serious accident hazard may occur.

To achieve the above and other related objects, the present invention provides a cart including: a vehicle body assembly; the driving wheel is connected to the vehicle body assembly through a wheel shaft and can rotate around the wheel shaft; the power assembly is fixed in a hub of the driving wheel and drives the driving wheel to rotate; the brake assembly is arranged on the driving wheel and realizes braking of the driving wheel; the control device is fixed on the vehicle body assembly and is electrically connected with the power assembly and the brake assembly; the power supply device is fixed on the vehicle body assembly and is electrically connected with the power assembly and the control device; the brake assembly includes: the first brake component is fixed at the driving wheel and realizes braking on the driving wheel; the second brake part is fixed on a push rod of the vehicle body assembly and is connected with the first brake part through a pull cable, and the second brake part is electrically connected with the control device through a signal wire; when the brake assembly is in a braking state, the control connection between the control device and the power assembly is disconnected.

In one embodiment of the present invention, the first brake component includes: the brake drum is coaxially fixed with the hub of the driving wheel and forms an accommodating cavity; the brake cover is fixedly connected with the vehicle body assembly and seals the opening of the accommodating cavity; the brake cover is detachably and fixedly connected with the brake block, and an elastic part is arranged between the two brake shoes and is elastically connected with the two brake shoes through the elastic part; the brake pads are attached to the surfaces of the brake shoes and correspond to the inner side walls of the accommodating cavities; one end of the adjusting rod is clamped between the two brake shoes, and the other end of the adjusting rod penetrates through the brake cover and is rotatably connected with the brake cover; and one end of the adjusting bracket is fixedly connected with the adjusting rod, and the other end of the adjusting bracket is in transmission connection with the second brake component through a pull cable.

In an embodiment of the present invention, the elastic member includes: and two ends of the tension spring are respectively hooked with the connecting holes at the same end of the two brake shoe pieces.

In an embodiment of the utility model, a wire pipe is sleeved on the guy cable connected with the adjusting bracket, a stop block is fixed at one end of the wire pipe close to the adjusting bracket, and the stop block is fixed with the body bracket in the body assembly.

In an embodiment of the present invention, a first return spring is sleeved on the cable connected to the adjusting bracket and is located between the stopper and the adjusting bracket.

In an embodiment of the present invention, the second brake component includes: the mounting sleeve is sleeved on a push rod in the vehicle body assembly; the brake handle is rotationally connected with the mounting sleeve through a rotating shaft; one end of the pull rope is fixedly connected with the brake handle, and the other end of the pull rope is fixedly connected with the adjusting bracket; the brake switch is fixed on the mounting sleeve and is linked with the brake handle to realize the on-off of the brake switch; and the signal wire is electrically connected with the brake switch and the control device.

In an embodiment of the utility model, a second return spring is sleeved on the rotating shaft of the brake handle connected with the mounting sleeve.

In an embodiment of the present invention, two pull cables are disposed on the brake handle, and correspond to the first brake component and the second brake component one to one.

In one embodiment of the present invention, the vehicle body assembly includes: a car hopper; the push rod is fixed on one side of the car hopper and used for installing the control device and the second brake component; and the vehicle body bracket is arranged at the bottom of the hopper and is used for installing the driving wheel.

In an embodiment of the present invention, universal wheels are further fixed at the bottom of the vehicle body support.

In an embodiment of the utility model, a cavity is formed in the hub of the driving wheel for mounting the power assembly and the first brake component.

In an embodiment of the present invention, the power assembly includes: the hub motor is arranged in the cavity on the driving wheel; two ends of a motor rotating shaft in the hub motor penetrate through the waist-shaped groove of the vehicle body support and are fixedly connected with the vehicle body support; a rotor core of the hub motor is fixedly connected with the side wall of the cavity; and a positioning assembly is arranged at the joint of a motor rotating shaft of the hub motor and the vehicle body bracket.

In an embodiment of the present invention, the positioning assembly includes: the positioning washers are coaxially arranged at two ends of a motor rotating shaft of the hub motor in a penetrating manner, a boss is formed on each positioning washer, and the boss is embedded into a waist-shaped groove of the vehicle body support; and the fixing nut is in threaded connection with two ends of a motor rotating shaft of the hub motor.

In an embodiment of the present invention, the power device includes: the battery box is fixed on a vehicle body bracket of the vehicle body assembly; the battery pack cavity is formed in the battery box; the battery pack is detachably fixed in the battery pack cavity; and the power line is electrically connected with the battery pack and the hub motor in the power assembly.

In an embodiment of the utility model, two battery pack cavities are formed in the battery box.

As described above, the cart according to the present invention has the following advantages:

1. the second brake part is electrically connected with the control device through the signal wire, so that when the brake assembly is in a braking state, the control connection between the control device and the power assembly is disconnected, and the braking performance and the braking safety of the brake assembly can be effectively improved.

2. First brake part on two steerable drive wheels through a second brake part can make two drive wheels brake simultaneously, can promote braking promptness and security, still can promote integrating of brake assembly, reduces the spare part quantity of brake assembly, reduction in production cost.

3. The two driving wheels are provided with the hub motors respectively, and the control device controls the two hub motors simultaneously, so that the two driving wheels can run simultaneously, and the power performance of the driving wheels and the stability of a vehicle body in running are improved; all install first brake part on two drive wheels, can realize the simultaneous braking of two drive wheels, can brake rapidly and stop, and can not take place the phenomenon of sideslipping, let the handcart operation safer.

Drawings

FIG. 1 is an isometric view of a cart according to one embodiment of the present invention;

FIG. 2 is a schematic view of a body frame of a cart according to an embodiment of the present invention;

FIG. 3 is a schematic view of a drive wheel of a cart according to an embodiment of the present invention;

FIG. 4 is an exploded view of a cart with drive wheels mounted thereon according to one embodiment of the present invention;

FIG. 5 is a cross-sectional view of a drive wheel of a cart in accordance with an embodiment of the present invention;

FIG. 6 is a schematic view of the exterior of the first brake assembly of the cart in accordance with one embodiment of the present invention;

FIG. 7 is a schematic view of the interior of the first brake assembly of the cart in accordance with one embodiment of the present invention;

FIG. 8 is an enlarged view of portion A of FIG. 7, showing primarily the connection of the two brake shoes;

FIG. 9 is a schematic view of an adjustment lever of a cart according to an embodiment of the present invention;

FIG. 10 is an enlarged view of a portion B of FIG. 9, mainly illustrating the structure of the adjustment lever;

FIG. 11 is an assembly view of a second brake assembly mounted on the push rod of a cart in accordance with an embodiment of the present invention;

FIG. 12 is a schematic view of a second brake assembly of the cart in accordance with an embodiment of the present invention;

FIG. 13 is an enlarged view of a portion C of FIG. 12, mainly illustrating the structure of the clip groove and the slot;

fig. 14 is a circuit diagram showing the control device, the brake switch, the in-wheel motor, and the power supply device.

Description of the element reference numerals

1. A vehicle body assembly; 11. a car hopper; 12. a push rod; 121. hooking; 13. a vehicle body support; 131. a support plate; 132. a waist-shaped groove; 133. an opening; 2. a wheel assembly; 21. a drive wheel; 22. a universal wheel; 23. a positioning assembly; 231. a positioning washer; 232. fixing a nut; 233. a boss; 3. a power assembly; 31. a hub motor; 32. a motor shaft; 321. a flat shaft; 4. a brake assembly; 41. a first brake component; 411. a brake drum; 4111. an accommodating chamber; 412. a brake cover; 4121. a support bar; 413. a brake shoe; 4131. a semicircular groove; 4132. connecting holes; 414. a brake pad; 415. adjusting a rod; 416. adjusting the bracket; 4161. inserting holes; 417. a tension spring; 418. a first return spring; 42. a second brake component; 421. installing a sleeve; 4211. an ear plate; 4212. a slot; 422. a brake handle; 4221. a clamping groove; 4222. a pressure plate is contacted; 423. a cable; 4231. a clamping block; 424. a brake switch; 425. a signal line; 426. a conduit; 4261. a stopper; 427. a rotating shaft; 428. a second return spring; 5. a control device; 6. a power supply device; 61. a battery case; 62. a battery pack cavity; 63. a battery pack.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.

Please refer to fig. 1 to 14. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a cart, which includes a cart body assembly 1; the wheel assembly 2 rotates at the bottom of the vehicle body assembly 1; the power assembly 3 is fixed in a hub of the wheel assembly 2 and drives the wheel assembly 2 to move; the brake assembly 4 is arranged on the wheels of the wheel assembly 2 to realize the braking of the wheel assembly 2; the control device 5 is fixed on the vehicle body assembly 1 and is electrically connected with the power assembly 3 and the brake assembly 4; and the power supply device 6 is fixed on the vehicle body assembly 1 and is electrically connected with the power assembly 3 and the control device 5.

Referring to fig. 1 and 2, in the present embodiment, the vehicle body assembly 1 includes a hopper 11, a push rod 12, and a vehicle body bracket 13. The car hopper 11 can be used for loading wastes generated in garden operation or tools required in operation, and it should be noted that the trolley disclosed by the utility model can be applied to other engineering fields as well as garden operation. The bottom of the car hopper 11 is fixedly connected with a car hopper bracket 13 through bolts, the car body bracket 13 can support the car hopper 11, and meanwhile, installation conditions are provided for the wheel assembly 2, the power assembly 3, the control device 5 and the power supply device 6; the push rod 12 is in a U-shaped rod shape, two ends of the push rod are fixed on the side wall of the car hopper 11 through bolts, and hooks 121 are formed at two connecting positions of the push rod 12 and the car hopper 11. In addition, the control device 5 and the partial brake assembly 4 are both arranged on the push rod 12, so that the operation is convenient.

Referring to fig. 1 and 2, in the present embodiment, the wheel assembly 2 includes a driving wheel 21 and a universal wheel 22. Drive wheel 21 and universal wheel 22 are all installed on body bracket 13, and wherein, drive wheel 21 is as the front wheel of whole wheel assembly 2, and the universal wheel 22 is as the rear wheel of whole wheel assembly 2, adopts the setting of front wheel drive, rear wheel steering for the handcart has rotation efficiency height, and turns to sensitive advantage. The driving wheels 21 and the universal wheels 22 are symmetrically arranged at the bottom of the trolley body support 13, and a four-wheel structure is adopted, so that the balance and the stability of the trolley can be effectively ensured;

referring to fig. 3, the car body frame 13 includes four supporting plates 131, and the four supporting plates 131 are arranged on the car body frame 12 and arranged along the width direction of the car hopper 11, a driving wheel mounting position (not labeled in the figure) is formed between every two supporting plates 131, and two driving wheel mounting positions correspond to two sides of the car hopper 11 in the width direction, and two driving wheels 21 are arranged in the corresponding mounting positions; a cavity (not labeled in the figure) is formed in the hub of the driving wheel 21 and is used for installing the power assembly 3 and part of the brake assembly 4, it should be noted that each supporting plate 131 is provided with a waist-shaped groove 132, the waist-shaped groove 132 is located at the edge of the supporting plate 131, one side wall of the waist-shaped groove 132 is provided with an opening 133, the length of the opening 133 is smaller than that of the waist-shaped groove 132, the axes of the waist-shaped grooves 132 on each supporting plate 131 are located on the same straight line, and the motor rotating shaft 32 is placed in the waist-shaped groove 132 through the opening 133 and is clamped and fixed with the waist-shaped groove 132, so that the installation and fixation of the driving wheel 21 are realized.

Referring to fig. 1 and 2, in the present embodiment, a power assembly 3 and a partial brake assembly 4 are mounted on both driving wheels 21. The two driving wheels 21 are respectively provided with the power assembly 3, and the two power assemblies 3 are simultaneously controlled by the control device 5, so that the two driving wheels 21 can run simultaneously, and the power performance of the driving wheels 21 and the running stability of the vehicle body are improved; all install some brake assemblies 4 on two drive wheels 21, can realize the braking simultaneously of two drive wheels 21, can stop promptly, and can not take place the phenomenon of sideslipping, let the handcart operation safer.

Referring to fig. 3, 4 and 5, the powertrain 3 includes a hub motor 31. In the present embodiment, the hub motor 31 is of an outer rotor type, such as: a low-speed outer rotor motor; the hub motor 31 is composed of a motor shaft 32, a rotor core (not shown), a permanent magnet (not shown), and other components. Flat shaft 321 is formed at two ends of motor shaft 32, and the flat part of flat shaft 321 is matched with the size of opening 133, flat shaft 321 vertically passes through corresponding opening 133, and flat shaft 321 is horizontally arranged in corresponding waist-shaped groove 132, so that two ends of motor shaft 32 are respectively clamped and fixed with corresponding support plate 131, and motor shaft 32 is rotatably connected with the hub of driving wheel 21 through a bearing, the rotor core of in-wheel motor 31 is fixedly connected with the side wall of the cavity in driving wheel 21 through a rotor bracket, and when the rotor of in-wheel motor 31 runs, the rotation of driving wheel 21 is driven.

Referring to fig. 3, 4 and 5, in the present invention, a positioning assembly 23 is installed at a connection position of the motor shaft 32 of the in-wheel motor 31 and each support plate 131. In the present embodiment, the positioning assembly 23 includes a positioning washer 231 and a fixing nut 232. The positioning washers 231 coaxially penetrate through two ends of the motor rotating shaft 32 in the hub motor 31 and are positioned between the supporting plate 131 and the fixing nut 232; wherein, a boss 233 is formed on the positioning washer 231, the boss 233 is embedded into the waist-shaped groove 132 of the supporting plate 131, and the two ends of the motor rotating shaft 32 are clamped in the waist-shaped groove 132; the fixing nuts 232 are in threaded connection with two ends of the motor rotating shaft 32 and tightly abut against the positioning washers 231, so that the driving wheel 21 and the hub motor 31 are installed; it should be noted that, the two ends of the motor shaft 32, the waist-shaped groove 132 on the supporting plate 131 and the positioning washer 231 are all in waist-shaped structures, and the three are assembled with each other, thereby greatly improving the mounting firmness of the driving wheel 21 and the in-wheel motor 31.

Referring to fig. 1 and 2, the brake assembly 4 includes a first brake element 41 and a second brake element 42. The first brake component 41 is fixed in the cavity of the driving wheel 21 to realize the braking of the driving wheel 21, and the second brake component 42 is fixed on the push rod 12; two first brake components 41 are arranged on the trolley and correspond to the two driving wheels 21 one by one; the second brake component 42 comprises two cables 423 and a signal wire 425 and is connected with the two first brake components 41 through the two cables 423, and one second brake component 42 can control the first brake components 41 on the two driving wheels 21, so that the two driving wheels 21 can brake simultaneously, the brake timeliness and safety can be improved, the integration of the brake assembly 4 can be improved, the number of parts of the brake assembly 4 is reduced, and the production cost is reduced; the second brake part 42 is electrically connected with the control device 5 through the signal line 425, so that when the brake assembly 4 is in a braking state, the control connection between the control device 5 and the hub motor 31 is disconnected, and the braking performance and the braking safety of the brake assembly 4 can be effectively improved.

Referring to fig. 5 to 9, in the present embodiment, the first brake component 41 includes a brake drum 411, a brake cover 412, a brake shoe 413, a brake pad 414, an adjustment rod 415 and an adjustment bracket 416. The brake drum 411 is coaxially fixed with the hub of the driving wheel 21, an accommodating cavity 4111 is formed inside the brake drum, and one side of the accommodating cavity 4111 departing from the hub motor 31 is open and used for mounting parts such as a brake shoe 413 and a brake shoe 414; the brake cover 412 is fixed on the support plate 131 through a bolt, and closes the open side of the accommodating cavity 4111, a through hole structure (not labeled in the figure) for the motor rotating shaft 32 to pass through is coaxially formed in the brake cover 412, and it should be noted that the support plate 131 fixedly connected with the brake cover 412 is the support plate 131 outside the driving wheel 21; in addition, a supporting rod 4121 is fixed on the brake cover 412, and the supporting rod 4121 extends toward the accommodating cavity 4111 to support and position the brake shoe 413.

Referring to fig. 5, 6 and 7, the brake shoes 413 are disposed in the accommodating cavity 4111, in this embodiment, two brake shoes 413 are disposed in the accommodating cavity 4111, the two brake shoes 413 have the same shape and structure and are both semicircular, an arc surface adapted to an inner side wall of the accommodating cavity 4111 is formed on each brake shoe 413, and the brake shoes 414 are fixed on the arc surface and correspond to the brake shoes 413 one by one; in addition, the two brake shoes 413 are provided with semicircular grooves 4131 at the mutually abutted ends, and the two semicircular grooves 4131 are clamped with the support rod 4121 on the brake cover 412, so that the two brake shoes 4123 are supported; the other end of the mutual butt of two brake shoes 413 is pressed from both sides the one end of adjusting pole 415, and the rotation of adjusting pole 415 can realize the expansion of two brake shoes 413 to make brake block 414 and the inside wall butt that holds chamber 4111, realize the effect of braking.

Referring to fig. 7 and 8, the two ends of the brake shoe 413 are respectively provided with a connecting hole 4132, the connecting holes 4132 of the two brake shoes 413 are identical in position and shape, and an elastic member is disposed between the two brake shoes 413 and elastically connected by the elastic member. In the present embodiment, the elastic member includes a tension spring 417; two ends of the tension spring 417 are respectively hooked with the connecting holes 4132 at the same end of the two brake shoes 413, and two tension springs 417 are arranged on the brake shoes 413 and are in one-to-one correspondence with two ends abutted against the two brake shoes 413.

Referring to fig. 9 and 10, one end of the adjusting rod 415 is in a block shape and is clamped between the two brake shoes 413, and when the driving wheel 21 normally operates, the block-shaped end of the adjusting rod 415 is vertically arranged, and at this time, the two brake shoes 414 are not in contact with the brake drum, and no braking force is generated; when the driving wheel 21 brakes, the adjusting rod 415 rotates through the adjusting bracket 416, and one end of the adjusting rod in a block shape is horizontally arranged, so that the two brake shoes 413 can be spread, and at the moment, the two brake shoes 414 are in contact with the brake drum 411 to generate braking force, so that the driving wheel 21 brakes. The other end of the adjusting rod 415 passes through the brake cover 412 and extends outside the accommodating cavity 4111, and is fixedly connected with one end of the adjusting bracket 416, and the adjusting rod 415 is rotatably connected with the brake cover 412 through a bearing; the fixed end of the adjusting rod 415 and the fixed end of the adjusting bracket 416 are engaged and fixed with each other through a latch structure, that is, a latch (not shown in the figure) is arranged at the end of the adjusting rod 415 extending outside the accommodating cavity 4111 and arranged along the circumferential direction of the adjusting rod 415, a through hole 4161 is arranged at the position, connected with the adjusting rod 415, on the adjusting bracket 416, a clamping groove (not shown in the figure) is arranged on the hole wall of the through hole 4161, and the latch and the open groove are engaged with each other to realize fixed connection; in addition, the adjusting bracket 416 also adopts a hoop structure principle, namely, one side of the through hole is opened along the direction perpendicular to the axis of the through hole 4161, and the hole wall of the through hole 4161 and the adjusting rod 415 are tightly held by a bolt, so that the adjusting rod 415 and the adjusting bracket 416 are detachably connected.

Referring to fig. 11 to 14, the other end of the adjusting bracket 416 is in transmission connection with the first brake component 41 through a cable 423, a line tube 426 is sleeved on the cable 423, the line tube 426 can protect the cable 423, a stop 4261 is fixed at one end of the cable 423 close to the adjusting bracket 416, the stop 4261 is fixed on the support plate 131, a first return spring 418 is further sleeved on the cable 423, and two ends of the first return spring 418 are respectively abutted against the stop 4261 and the adjusting bracket 416; in actual operation, a user drives the adjusting bracket 416 to rotate through the cable 423 in the first brake component 41, so that the first return spring 418 located on the stop 4261 and the adjusting bracket 416 is in a compressed state, and after braking is finished, the first return spring 418 resets the adjusting bracket 416 through elastic potential energy of the first return spring 418, so that the repeatability and the continuity of braking are met.

Referring to fig. 12 and 13, in the present embodiment, the second brake component 42 further includes a mounting sleeve 421, a brake handle 422, a brake switch 424, and a signal line 425. The mounting sleeve 421 is fixed on the push rod 12 by adopting the principle of a hoop structure, that is, an opening is formed on the mounting sleeve 421, ear plates 4211 are integrally formed on two sides of the opening, and the two ear plates 4211 are fixedly connected through bolts, so that the mounting sleeve 421 is tightly held on the push rod 12; a rotating shaft 427 is vertically arranged on the mounting sleeve 421 in a penetrating manner, the brake handle 422 is rotatably connected to the mounting sleeve 421 through the rotating shaft 427, and a second return spring 428 is sleeved at the joint of the brake handle 422 and the rotating shaft 427, so that after a user releases the brake handle 422, the second return spring 428 restores the brake handle 422 to the original position through elastic potential energy generated by self compression, thereby facilitating the next braking operation.

Referring to fig. 12 and 13, two clamping grooves 4221 are formed in the brake handle 422, the two clamping grooves 4221 are formed in one end of the brake handle 422 close to the mounting sleeve 421 and located on two side surfaces of the brake handle 4221, the two clamping grooves 4221 correspond to the two cables 423 one by one, a clamping block 4231 is formed at one end of the cable 423 connected with the brake handle 422, and the clamping of the cable 423 and the brake handle 422 is realized through the embedding and matching of the clamping block 4231 and the clamping grooves 4221; the butt joint of the installation sleeve 421 and the brake handle 422 is provided with an insertion groove 4212 communicated with the clamping grooves 4221, the insertion groove 4212 corresponds to the two clamping grooves 4221, the pull cable 423 and the line pipe 426 are arranged in the insertion groove 4212, the insertion groove 4212 in the installation sleeve 421 clamps one end of the line pipe 426 in the insertion groove 4212, and the two ends of the line pipe 426 can be fixed through the insertion groove 4212 and the stop block 4261.

Referring to fig. 12 to 14, the brake switch 424 is fixed on the mounting sleeve 421, and a contact of the brake switch 424 is in transmission connection with the brake handle 422 and is electrically connected to the control device 5 through a signal line 425; a touch pressure plate 4222 is vertically fixed on the brake handle 422, and the contact of the brake switch 424 corresponds to the touch pressure plate 4222. Fig. 11 shows a circuit diagram among the control device 5, the brake switch 424, the in-wheel motor 31 and the power supply device 6, when the user toggles the brake handle 422, the touch plate 4222 is separated from the contact of the brake switch 424, the brake switch 424 is in an off state, so that the control device 5 receives the state information of the trolley brake through the signal line 425 and disconnects the control connection between the control device 5 and the in-wheel motor 31, at this time, the in-wheel motor 31 stops operating, the situation that the brake assembly 4 and the in-wheel motor 31 operate simultaneously is avoided, and the braking performance and the braking safety of the brake assembly 4 are improved; when the brake assembly 4 does not need braking, the contact pressing plate 4222 on the brake handle 422 is abutted to the contact of the brake switch 424, and the brake switch 424 is in a closed state, so that the circuit connection in the trolley can work normally, and the control connection between the control device 5 and the hub motor 31 is recovered.

Referring to fig. 1 and 11, the control device 5 is mounted on the push rod 12 and located in a direction opposite to the user, the control device 5 is electrically connected to the power supply device 6 and the brake switch 424 through a signal line 425, and the control device 5 is provided with a plurality of shift levers (not shown), control knobs (not shown), and switches (not shown), so as to control the hub motor 31, control the start and stop of the hub motor 31, adjust the operating power of the hub motor 31, adjust the traveling speed of the cart, improve the integration of electrical control of the cart, and facilitate the operation of the user.

Referring to fig. 2, in the present embodiment, the power supply device 6 includes a battery box 61, a battery pack cavity 62, a battery pack 63 and a power cord (not shown). The battery box 61 is fixedly connected with the vehicle body support 13, and the battery pack cavities 62 are formed in the battery box 61, it should be noted that two battery pack cavities 62 are formed in the battery box 61; the battery pack 63 is detachably mounted in the battery pack cavity 62, and electrically connects the battery box 61 with the in-wheel motor 31 through a power cord, thereby supplying power to the in-wheel motor 31 and the control device 5. In addition, battery case 61 is located hopper 11 rear portion to be located the below of push rod 12, through adopting the counter weight with automobile body weight to set to the anterior fifty percent, the fifty structural style of rear portion percent to make the focus of handcart be located holistic mid sole position, and then when promoting the handcart or lifting the handcart, the focus of automobile body is stable, is difficult to empty, safe in utilization, convenient operation.

When the handcart needs to be braked, a user pulls the brake handle 422, the brake switch 424 is switched off, so that the power supply device 6 stops supplying power to the hub motor 31, and the hub motor 31 stops running; meanwhile, the brake handle 422 pulls the cable 423, so that the adjusting bracket 416 rotates along the axial direction of the adjusting rod 415, and the adjusting rod 415 is driven to rotate, one end of the adjusting rod 415 clamped between the two brake shoes 413 props the two brake shoes 413 open, so that the brake shoes 414 fixed on the brake shoes 413 are abutted to the inner side wall of the brake drum 411, because the position of the brake shoes 413 relative to the trolley is basically unchanged, the brake drum 411 is in a rotating state, the friction force generated between the brake shoes 413 and the brake drum 411 can reduce the rotating speed of the driving wheel 21, and the trolley is braked. After the handcart is braked, a user releases the brake handle 422, the brake switch 424 is closed again, the electric connection among the control device 5, the power supply device 6 and the hub motor 31 is restored, and the first return spring 418 and the second return spring 428 respectively reset the brake handle 422 and the adjusting bracket 416 to the original positions, so that the brake pads 414 in the brake drum 411 are separated from the inner side wall of the brake drum 411, and the driving wheel 21 can normally run.

In summary, the second brake component 42 is electrically connected to the control device 5 through the signal line 425, so that when the brake assembly 4 is in a braking state, the control connection between the control device 5 and the hub motor 31 is disconnected, and the braking performance and the braking safety of the brake assembly 4 can be effectively improved; the first brake parts 41 on the two driving wheels 21 can be controlled by one second brake part 42, so that the two driving wheels 21 can brake simultaneously, the brake timeliness and safety can be improved, the integration of the brake assembly 4 can be improved, the number of parts of the brake assembly 4 is reduced, and the production cost is reduced; the two driving wheels 21 are respectively provided with the wheel hub motor 31, and the control device 5 is used for simultaneously controlling the two wheel hub motors 31, so that the two driving wheels 21 can run simultaneously, and the power performance of the driving wheels 21 and the running stability of a vehicle body are improved; all install first brake part 41 on two drive wheels 21, can realize the braking simultaneously of two drive wheels 21, can stop promptly, and can not take place the phenomenon of sideslipping, let the handcart operation safer. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A cart, comprising:

a vehicle body assembly;

the driving wheel is connected to the vehicle body assembly through a wheel shaft and can rotate around the wheel shaft;

the power assembly is fixed in a hub of the driving wheel and drives the driving wheel to rotate;

the brake assembly is partially arranged on the driving wheel to realize braking on the driving wheel;

the control device is fixed on the vehicle body assembly and is electrically connected with the power assembly and the brake assembly;

the power supply device is fixed on the vehicle body assembly and is electrically connected with the power assembly and the control device;

the brake assembly includes:

the first brake component is fixed at the driving wheel and realizes braking on the driving wheel;

the second brake part is fixed on a push rod of the vehicle body assembly and is connected with the first brake part through a pull cable, and the second brake part is electrically connected with the control device through a signal wire;

when the brake assembly is in a braking state, the control connection between the control device and the power assembly is disconnected.

2. A trolley according to claim 1, characterized in that: the first brake component includes:

the brake drum is coaxially fixed with the hub of the driving wheel and forms an accommodating cavity;

the brake cover is fixedly connected with the vehicle body assembly and seals the opening of the accommodating cavity;

the brake cover is detachably and fixedly connected with the brake block, and an elastic part is arranged between the two brake shoes and is elastically connected with the two brake shoes through the elastic part;

the brake pads are attached to the surfaces of the brake shoes and correspond to the inner side walls of the accommodating cavities;

one end of the adjusting rod is clamped between the two brake shoes, and the other end of the adjusting rod penetrates through the brake cover and is rotatably connected with the brake cover;

and one end of the adjusting bracket is fixedly connected with the adjusting rod, and the other end of the adjusting bracket is in transmission connection with the second brake component through a pull cable.

3. A trolley according to claim 2, characterized in that: the elastic member includes:

and two ends of the tension spring are respectively hooked with the connecting holes at the same end of the two brake shoe pieces.

4. A trolley according to claim 2, characterized in that: and a wire pipe is sleeved on the inhaul cable connected with the adjusting support, the wire pipe is close to one end of the adjusting support is fixed with a stop block, and the stop block is fixed with a vehicle body support in the vehicle body assembly.

5. A trolley according to claim 4, characterized in that: and a first return spring is sleeved on a guy cable connected with the adjusting bracket and is positioned between the stop block and the adjusting bracket.

6. A trolley according to claim 2, characterized in that: the second brake component includes:

the mounting sleeve is sleeved on a push rod in the vehicle body assembly;

the brake handle is rotationally connected with the mounting sleeve through a rotating shaft;

one end of the pull rope is fixedly connected with the brake handle, and the other end of the pull rope is fixedly connected with the adjusting bracket;

the brake switch is fixed on the mounting sleeve and is linked with the brake handle to realize the on-off of the brake switch;

and the signal wire is electrically connected with the brake switch and the control device.

7. A trolley according to claim 6, characterized in that: and a second return spring is sleeved on a rotating shaft connected with the brake handle and the mounting sleeve.

8. A trolley according to claim 6, characterized in that: the cable is in brake lever is provided with two, and with first brake part with the second brake part one-to-one.

9. A trolley according to claim 1, characterized in that: the vehicle body assembly includes:

a car hopper;

the push rod is fixed on one side of the car hopper and used for installing the control device and the second brake component;

and the vehicle body bracket is arranged at the bottom of the hopper and is used for installing the driving wheel.

10. A trolley according to claim 9, characterized in that: the bottom of the vehicle body support is also fixed with universal wheels.

11. A trolley according to claim 9, characterized in that: a cavity is formed in a hub of the driving wheel and used for mounting the power assembly and the first brake component.

12. A trolley according to claim 11, characterized in that: the power assembly includes:

the hub motor is arranged in the cavity on the driving wheel;

two ends of a motor rotating shaft in the hub motor penetrate through the waist-shaped groove of the vehicle body support and are fixedly connected with the vehicle body support;

a rotor core of the hub motor is fixedly connected with the side wall of the cavity;

and a positioning assembly is arranged at the joint of a motor rotating shaft of the hub motor and the vehicle body bracket.

13. A trolley according to claim 12, characterized in that: the positioning assembly comprises:

the positioning washers are coaxially arranged at two ends of a motor rotating shaft of the hub motor in a penetrating manner, a boss is formed on each positioning washer, and the boss is embedded into a waist-shaped groove of the vehicle body support;

and the fixing nut is in threaded connection with two ends of a motor rotating shaft of the hub motor.

14. A trolley according to claim 1, characterized in that: the power supply device includes:

the battery box is fixed on a vehicle body bracket of the vehicle body assembly;

the battery pack cavity is formed in the battery box;

the battery pack is detachably fixed in the battery pack cavity;

and the power line is electrically connected with the battery pack and the hub motor in the power assembly.

15. A trolley according to claim 14, characterized in that: the battery pack cavities are two in number on the battery box.