CN213973496U - Dual drive AGV dolly - Google Patents

Abstract

The utility model provides a dual drive AGV dolly, including automobile body, wheel and drive wheel subassembly fixed mounting in on the chassis of automobile body bottom. The driving wheel assembly comprises a fixing plate, a driving wheel which is rotatably fixed below the fixing plate, a spring buffer mechanism which is fixedly connected with the fixing plate, and a guide mechanism which is connected with the fixing plate in a sliding manner. The guide mechanism comprises a guide rod and a guide bearing, the top of the guide rod is fixedly connected with the fixed plate, the guide bearing is fixedly connected with the chassis, the fixed plate can move up and down by sliding up and down along the guide bearing through the guide rod, and the spring buffer mechanism provides power for the fixed plate to move down. And the side surface of the vehicle body is provided with an anti-collision strip. The utility model discloses a dual drive AGV dolly can realize multidirectional craspedodrome, turns to in a flexible way, and it is little to turn to required running space, and goes steadily, can satisfy the intensive space requirement of storage system.

Description

Dual drive AGV dolly

Technical Field

The utility model relates to a AGV technical field especially relates to a dual drive AGV dolly.

Background

An AGV is a transport vehicle equipped with an electromagnetic or optical automatic navigation device, capable of traveling along a predetermined navigation route, and having safety protection and various transfer functions. The industrial application does not need a driver's transport vehicle, and a rechargeable storage battery is used as a power source of the industrial application. Generally, the traveling path and behavior can be controlled by a computer, or the traveling path can be established by using an electromagnetic rail, which is adhered to the floor, and the automated guided vehicle moves and operates according to the information brought by the electromagnetic rail.

The intensive storage system is a storage and distribution mode of a manufacturing plant warehouse, a large logistics center, a large storage center, an e-commerce warehouse and the like. The space utilization of the dense warehousing system is very high, which results in narrow passage and limited space operation environment. If an AGV is desired to be able to operate in this environment, it must be capable of flexible omnidirectional travel. Meanwhile, with the high-speed development in the fields of industry, transportation, electronics and the like, people have higher and higher requirements on the efficiency of material transportation and space utilization rate.

In the prior art, an AGV trolley is usually driven by a differential drive or a single steering wheel, and because the differential drive is realized by completely depending on the speed between an inner steering wheel and an outer steering wheel, a controller of the AGV trolley has the situation of inaccurate control, and the trolley can generate the conditions of wheel slippage, vibration and the like in the steering process, thereby easily causing the abrasion of the wheels; the single-steering wheel driving realizes the functions of driving and steering only by using one driving wheel, and in addition, the auxiliary wheel is used as a support, the turning of the trolley in the driving mode is easy to deviate from a guide line, the precision is low, large-size goods cannot be stably carried, the requirement of walking in a narrow roadway cannot be met, meanwhile, the turning radius is large, the space required by steering is large, and the requirement of high utilization rate of the space of a storage system cannot be met.

In addition, most common AGV trolleys in the market at present adopt indirect transportation turnover carriers such as turnover shelves and the like, and only complete turnover work of target goods but cannot complete storage and taking work of the target goods. In the intensive warehousing system, the storage of single-box goods is common, so that the equipment is required to directly complete the storage and taking work of target goods. Meanwhile, the common AGV trolley is mostly in a one-trolley one-box mode, the compatibility of the trolley and goods is poor, multiple types of trolleys need to be configured for butt joint of multiple types of gauge boxes, the reusability is poor, and the system efficiency is reduced and the cost input is increased.

Disclosure of Invention

For solving exist not enough among the prior art, the utility model provides a dual drive AGV dolly can realize multidirectional craspedodrome, turns to in a flexible way, and it is little to turn to required running space, and goes steadily, can satisfy warehouse system's intensive space requirement.

In order to achieve the above object, the utility model adopts the following technical scheme:

a double-drive AGV trolley at least comprises a trolley body, wheels and two groups of driving wheel assemblies, wherein the wheels and the driving wheel assemblies are fixedly arranged on a chassis at the bottom of the trolley body, and the two groups of driving wheel assemblies are respectively positioned at two ends of the bottom of the trolley body close to the length direction; the driving wheel assembly comprises a fixed plate, a driving wheel which is rotatably fixed below the fixed plate and connected with the fixed plate into a whole, a spring buffer mechanism fixedly connected with the fixed plate and a guide mechanism in sliding connection with the fixed plate;

the guide mechanism comprises a guide rod and a guide bearing, and the guide rod can slide up and down along the inner wall of the guide bearing; the top of the guide rod is fixedly connected with the fixed plate, the guide bearing is fixedly connected with the chassis, and the fixed plate can move up and down by the guide rod sliding up and down along the guide bearing;

the spring buffer mechanisms are arranged below the fixed plate, are two in number and are respectively positioned at two sides of the driving wheel; the spring pull rod is sleeved on the part of the spring pull rod below the chassis, the spring is always in a compressed state, a downward driving force is provided for one end of the spring pull rod penetrating through the chassis, and then a downward moving power is provided for the fixing plate;

and the side surface of the vehicle body is provided with an anti-collision strip.

The further improvement of the technical scheme is as follows:

the number of the guide mechanisms is four, the guide mechanisms are respectively arranged at four corners of the fixed plate and are positioned around the driving wheel.

The top of the trolley body is fixedly connected with a lifting mechanism, and the lifting mechanism comprises a fixed door frame, a lifting door frame in sliding connection with the fixed door frame, a motor assembly, a carrier frame in sliding connection with the lifting door frame and a first transmission device; the fixed portal frame is fixed on the top of the trolley body, and the motor assembly drives the first transmission device to drive the lifting portal frame to move up and down along the fixed portal frame.

The first transmission device comprises a first transmission chain, a fixed chain wheel fixed on the fixed door frame and a lifting chain wheel arranged on the motor assembly, the first transmission chain is sleeved on the fixed chain wheel and the lifting chain wheel and is fixedly connected with the lifting door frame, and the first transmission device drives the lifting door frame to move up and down; the lifting mechanism further comprises a second transmission device, the second transmission device comprises a second transmission chain and a movable chain wheel fixed on the lifting door frame, one end of the second transmission chain is fixedly connected with the fixed door frame, the other end of the second transmission chain penetrates through the movable chain wheel to be fixedly connected with the object carrier, and the second transmission device drives the object carrier to move up and down by taking the up-and-down movement of the lifting door frame as lifting power.

The motor assembly comprises a servo motor, a speed reducer connected to an output shaft of the servo motor, a driving gear sleeved on the output shaft of the speed reducer, a driven gear meshed with the driving gear, and a spindle assembly fixedly connected with the driven gear;

the main shaft assembly comprises a main shaft, the positions, close to the two ends, of the main shaft are respectively sleeved with a lifting chain wheel, bearing seats are respectively arranged on the main shaft on the inner side of the lifting chain wheel, a driven gear is sleeved on the position, corresponding to the driving gear, of the main shaft, and the driven gear can drive the main shaft to rotate.

And a bidirectional guide wheel is arranged between the lifting door frame and the fixed door frame, and the lifting door frame moves up and down along the fixed door frame through the bidirectional guide wheel.

The lifting mechanism is fixedly connected with a telescopic fork, and the telescopic fork comprises a horizontally arranged mounting plate, a rotary speed reducing motor fixedly connected with the mounting plate, a driving rotary gear arranged on an output shaft of the rotary speed reducing motor, a driven rotary gear meshed with the driving rotary gear, and a fork assembly arranged on the driven rotary gear; a rotating shaft of the driven rotating gear is fixed on the mounting plate, and the rotating shaft is arranged along the vertical direction of the mounting plate; the pallet fork assembly comprises a rotary support, and the rotary support is fixedly connected with the driven rotary gear; the rotary support is fixedly connected with an expansion bracket, and the expansion bracket is connected with a cargo fork plate in a sliding manner.

The lifting mechanism is located at the edge of one side of the top of the vehicle body, an on-vehicle cache warehouse is arranged at the edge of the other side, opposite to the lifting mechanism, of the lifting mechanism, the on-vehicle cache warehouse is of a cuboid structure with an opening at one side, the opening direction of the on-vehicle cache warehouse faces towards the lifting mechanism, at least one group of load carriers are arranged on the inner surfaces of the two side walls of the on-vehicle cache warehouse in the vertical direction, and the height of the load carriers can be adjusted.

The two groups of driving wheel assemblies are symmetrically arranged on two sides of the center line of the length direction of the vehicle body.

Obstacle avoidance sensors are respectively arranged at the opposite corners of the side surface of the vehicle body.

According to the technical scheme of the utility model, because the utility model discloses an its drive wheel subassembly of dual drive AGV car is two sets of, controls through the automated control system of AGV dolly, can realize two-way craspedodrome and two-way sideslip, and its turning radius is little, turns to in a flexible way. The spring buffer mechanism can play a role in shock absorption, so that the AGV trolley can run more stably, and can provide power for the driving wheel assembly to move up and down. The guide mechanism can provide an accurate guide function, so that the fixed plate drives the driving wheel fixedly connected with the fixed plate to move up and down along the guide bearing. When the AGV dolly goes on uneven road surface, the spring force effect of spring buffer makes the drive wheel hug closely ground all the time and goes, has increased the frictional force between drive wheel and ground, avoids the AGV dolly phenomenon of skidding to appear, makes the AGV dolly go more stably. Through setting up the anticollision strip, increased the whole security of AGV dolly, effectively guaranteed the operational reliability of equipment.

Drawings

Fig. 1 is the utility model discloses AGV dolly overall structure sketch map.

Fig. 2 is the utility model discloses AGV dolly automobile body schematic diagram of overlooking.

Fig. 3 is a schematic sectional view taken along line B-B of fig. 2.

Fig. 4 is a schematic structural diagram of a driving wheel assembly according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a lifting mechanism according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a motor assembly of a lifting mechanism according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of the bidirectional guide wheel of the lifting mechanism according to the embodiment of the present invention.

Fig. 8 is a schematic structural view of a rotary retractable fork according to an embodiment of the present invention.

Fig. 9 is the utility model discloses on-vehicle buffer memory storehouse's structural schematic.

Fig. 10 is a schematic view of a connection between a motor assembly and a vehicle body according to an embodiment of the present invention.

The meaning of the reference symbols in the drawings is:

1-a lifting mechanism; 2-cargo; 3-vehicle buffer storage warehouse; 4-a vehicle body; 5-a telescopic fork; 6-obstacle avoidance sensor; 7-a drive wheel assembly; 8-anti-collision strip; 9-universal vehicle wheels; 701-a guide rod; 702-a guide bearing; 703-a fixing plate; 704-a chassis; 705-driving wheels; 706-a spring; 707-spring tension rod; 708-a rotation mechanism; 101-a first drive chain; 102-a position sensor; 103-a second drive chain; 104-linear slide rail; 105-a motor assembly; 106-a carrier rack; 107-top beam; 108-a fixed sprocket; 109-a movable sprocket; 110-a first beam; 111-a fixed gantry; 112-a second beam; 113-a support frame; 116-lifting the gantry; 117-movable guide wheels; 118-a stationary guide wheel; 1171-X guide wheels; 1172-Y guide wheels; 10501-bearing seat; 10502-main shaft; 10503-motor connection plate; 10504-driven gear; 10505-a lift sprocket; 10506-external encoder; 10507-a drive gear; 10508-a reducer; 10509-servo motor; 10510-built-in encoder; 501-pallet fork plate; 502-telescoping mast; 503-passive rotating gear; 504-a mounting plate; 505-a rotating support; 506-a driving rotation gear; 507-a rotating gear motor; 301-load carrying shelf.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1 to 9, the present invention is a specific structure of a dual-drive AGV cart according to an embodiment of the present invention.

Example 1: as shown in fig. 1 and 2, the dual drive AGV cart of this embodiment includes a cart body 4, universal wheels 9 and a drive wheel assembly 7. The universal wheels 9 are positioned at the four corners of the bottom of the vehicle body 4. The two groups of driving wheel assemblies 7 are respectively positioned at two ends of the bottom of the vehicle body 4 close to the length direction, the central lines L1 and L2 of the two groups of driving wheel assemblies 7 are respectively positioned at two sides of the central line L of the bottom of the vehicle body 4, and the distances among the L1, the L2 and the L are equal.

As shown in fig. 3 and 4, the driving wheel assembly 7 includes a fixing plate 703, a driving wheel 705, a rotating mechanism 708, a spring buffer mechanism, and a guide mechanism.

The wheel shaft of the driving wheel 705 is mounted on the lower surface of the fixing plate 703 through a mounting part, the mounting part is rotatably connected with the fixing plate 703, and the rotating mechanism 708 can drive the driving wheel 705 and the mounting part to rotate circumferentially by 360 degrees.

The two spring buffer mechanisms are arranged below the fixed plate 703 and are respectively positioned at two sides of the driving wheel 705; including spring 706 and spring pull 707. One end of the spring pull rod 707 is provided with a thread, a pull rod mounting hole is arranged at a position of the fixing plate 703 corresponding to the spring pull rod 707, the threaded end of the spring pull rod 707 penetrates through the pull rod mounting hole, and the spring pull rod 707 is locked on the fixing plate 703 by nuts on the upper and lower surfaces of the fixing plate 703 respectively. The other end of the spring rod 707 passes through the chassis 704 and can move up and down in the vertical direction. The spring 706 is sleeved on the spring pull rod 707 below the chassis 704, a base is arranged at the bottom of the spring pull rod 707, and the diameter of the base is larger than the outer diameter of the spring 706; one end of the spring 706 abuts against the upper surface of the base, and the other end abuts against the lower surface of the bottom plate 704 through a gasket, wherein the inner diameter of the gasket is smaller than the outer diameter of the spring 706. The spring 706 is always in compression.

The number of the guide mechanisms is four, and the guide mechanisms are respectively arranged at four corners of the fixed plate 703 and positioned around the driving wheel 705. Each guide mechanism comprises a guide rod 701 and a guide bearing 702, and the guide rod 701 can slide up and down along the inner wall of the guide bearing 702. The top of the guide rod 701 is fixedly connected with the fixed plate 703, the bottom of the vehicle body 4 is provided with a chassis 704, the top of the guide bearing 702 is fixedly connected with the chassis 704, and the fixed plate 703 moves up and down by the up-and-down sliding of the guide rod 701 along the guide bearing 702. A buffer device is arranged between the fixing plate 703 and the guide bearing 702.

Four guiding mechanism set up respectively in four edges of fixed plate 703, can diversely lead, and it is more stable when making fixed plate 703 reciprocate.

The limit distance of the up and down movement of the driving wheel 705 is determined by the travel of the guiding mechanism, the spring pull rod 707 and the bottom of the guiding bearing 702 are both above the horizontal plane, and when the fixing plate 703 runs down to the limit position, i.e. the spring 706 reaches the maximum extension length, the spring 706 is still in the compressed state. The spring buffer mechanism plays a role in buffering and damping, and meanwhile, the driving wheel 705 is forced to always cling to the ground to run, so that the friction force between the driving wheel 705 and the ground is increased, and the vehicle body 4 is prevented from slipping during running.

And two opposite side surfaces of the vehicle body 4 are respectively provided with an anti-collision strip 8.

And laser obstacle avoidance sensors 6 are respectively arranged at the opposite corners of the side surface of the vehicle body 4.

Through setting up anticollision strip 8 and keeping away devices such as barrier sensor 6, increased the overall security of AGV dolly, effectively guaranteed the operational reliability of equipment.

The principle of the embodiment is as follows: when the AGV runs to an uneven road surface, the AGV jolts, and due to the elastic force of the spring 706, the influence of the road surface on the vehicle body 4 can be reduced, so that the vehicle body 4 runs more stably. If the driving wheel 705 is just falling into the low-lying position of the road surface, the spring 706 is always in a compressed state, and the driving wheel 705 forms a certain gap with the low-lying ground, the restoring force of the spring 706 drives the spring pull rod 707 to move downwards, and the spring pull rod 707 is fixedly connected with the fixing plate 703, so that the fixing plate 703 moves downwards and drives the driving wheel 705 fixedly connected with the fixing plate to move downwards until the driving wheel 705 contacts with the ground. When the driving wheel 705 is in contact with the ground, the spring 706 is still under compression, and the restoring force thereof always applies a downward pressure to the driving wheel 705, so as to force the driving wheel 705 against the ground. When the driving wheel 705 runs to a higher ground, the four universal wheels 9 are located at a low position, the four universal wheels 9 are forced to cling to the ground under the action of gravity of the AGV trolley, the driving wheel 705 moves upwards relative to the vehicle body 4 at the moment, the spring 706 is still in a compressed state, and the restoring force of the spring always provides downward pressure for the driving wheel 705 to force the driving wheel 705 to cling to the ground. Two spring buffer mechanisms of the flexibly suspended driving wheel assembly 7 are always in a compression stress state, so that even if the dual-driving wheel 705 runs on uneven ground, the dual-driving wheel 705 is always attached to the ground due to the flexible stress of the spring 706, and the ground gripping force of the dual-driving wheel 705 is improved.

The double-driving wheels are arranged at the oblique opposite angle of the AGV trolley, the turning radius is reduced, the turning space is saved, the turning is flexible, and the bidirectional straight movement, the bidirectional transverse movement and the in-situ rotation can be realized. Four auxiliary universal wheels 9 guide to enable the AGV to run more stably. And the mechanism adopts a modular design, and is very convenient to disassemble and maintain.

Example 2: the double-drive AGV trolley structure of the embodiment is basically consistent with the structure of the embodiment 1, except that the AGV trolley of the embodiment further comprises a lifting mechanism 1, and the lifting mechanism 1 is fixed at the top of the trolley body 4.

The lifting mechanism 1 comprises a lifting portal 116, a fixed portal 111, a motor assembly 105, a carrier 106 and a transmission device; the fixed gantry 111 is fixed on the top of the vehicle body 4, and the motor assembly 105 drives the transmission device to drive the lifting gantry 116 to move up and down along the fixed gantry 111.

As shown in fig. 5 and 7, the lifting gantries 116 and the fixed gantries 111 are respectively arranged in pairs, and each pair of lifting gantries 116 and fixed gantries 111 are arranged corresponding to each other, so as to form a gantry structure with the fixed gantries 111 on the outside and the lifting gantries 116 on the inside; the lifting portal 116 and the fixed portal 111 are both of a grooved 'concave' frame structure, and each includes two opposite side wall plates and a connecting plate connected with the two side wall plates. A first beam 110 is arranged between the upper parts of the fixed door frames 111, and the first beam 110 is respectively and fixedly connected with the side wall plates on the same side of the fixed door frames 111. A top beam 107 is provided between the tops of the lifting masts 116. The lifting portal 116 and the fixed portal 111 in this embodiment are both made of channel steel, the grooves of the fixed portal 111 and the lifting portal 116 are installed oppositely, triangular support frames 113 are respectively arranged at the bottoms of the fixed portal 111, and the fixed portal 111 is fixed on the upper surface of the vehicle body 4 through the support frames 113.

As shown in fig. 7, a bidirectional guide wheel is arranged in the groove between the lifting gantry 116 and the fixed gantry 111, and the bidirectional guide wheel comprises a fixed guide wheel 118 and a movable guide wheel 117; the fixed guide wheel 118 is fixedly connected to the top of the fixed gantry 111 through a fixed guide wheel 118 support, and the movable guide wheel 117 is fixedly connected to the bottom of the lifting gantry 116 through a movable guide wheel 117 support; the fixed guide wheel 118 and the movable guide wheel 117 respectively comprise an X-guide wheel 1171 and a Y-guide wheel 1172 which are arranged in parallel up and down, the X-guide wheel 1171 of the fixed guide wheel 118 takes the inner surfaces of the two side wall plates of the lifting gantry 116 as rolling support surfaces, and the Y-guide wheel 1172 of the fixed guide wheel 118 takes the inner surface of the connecting plate of the lifting gantry 116 as rolling support surfaces; the X-guide 1171 of the movable guide wheel 117 uses the inner surfaces of the two side wall plates of the fixed gantry 111 as rolling support surfaces, and the Y-guide 1172 of the movable guide wheel 117 uses the inner surface of the connecting plate of the fixed gantry 111 as rolling support surfaces. The fixed guide wheel 118 and the movable guide wheel 117 provide bidirectional guide for the lifting mechanism 1, so that the guide is more stable, the stress is more reasonable, and the deflection caused by the gravity center is smaller during bidirectional lifting.

The side wall plates of the lifting gantry 116 far away from the first beam 110 are respectively provided with a linear slide rail 104, and the linear slide rails 104 are arranged along the height direction of the lifting gantry 116; the carrier rack 106 is slidably coupled to the lift gantry 116 via linear slide 104. The linear slide 104 on the lifting gantry 116 may guide the carrier 106 such that the carrier 106 is lifted upwards along the track of the linear slide 104 to prevent the carrier 106 from being deflected.

The transmission device comprises a first transmission device and a second transmission device, wherein the first transmission device comprises two fixed chain wheels 108 and two first transmission chains 101; the two fixed sprockets 108 are respectively fixedly arranged at positions close to two ends of the first cross beam 110; the two first transmission chains 101 are respectively sleeved on the fixed chain wheels 108 and are respectively fixedly connected with the bottoms of the lifting gantries 116; the first transmission chain 101 can drive the lifting gantry 116 to move up and down along the fixed gantry 111 through the guide wheels.

The second transmission means comprises a second transmission chain 103 in the form of a strip and a movable sprocket 109. The movable chain wheel 109 is fixedly connected to the middle position of the top beam 107, a second cross beam 112 is arranged on a fixed door frame 111 below the first cross beam 110, one end of the second transmission chain 103 is fixed on the second cross beam 112, and the other end of the second transmission chain passes through the movable chain wheel 109 and is fixedly connected with the object carrier 106. When the lifting mast 116 is lifted upward, the secondary chain drives the carrier rack 106 to lift upward along the linear slide 104 at a lifting speed twice that of the lifting mast 116.

The second transmission chain 103 is connected with the carrier frame 106 and the lifting portal 116 in a manner that the lifting distance of the carrier frame 106 is twice as long as that of the lifting portal 116, the lifting speed of the carrier frame 106 is twice as fast as that of the lifting portal 116, the lifting speed is high, and the purpose of saving space is achieved. The first transmission device and the second transmission device are not limited to one-stage lifting, and each transmission device can be extended to apply two-stage and multi-stage lifting so as to meet the goods taking and placing requirements of a goods shelf with a higher goods position.

As shown in fig. 6, a motor assembly 105 is fixedly disposed at the bottom of the fixed gantry 111, and the motor assembly 105 includes a dc servo motor 10509, a speed reducer 10508 connected to the output shaft of the servo motor 10509, a driving gear 10507 sleeved on the output shaft of the speed reducer 10508, a driven gear 10504 engaged with the driving gear 10507, and a main shaft 10502 assembly fixedly connected to the driven gear 10504. The servo motor 10509 is provided with an integrated built-in encoder 10510 and an external encoder 10506.

The main shaft 10502 assembly comprises a main shaft 10502, the positions of the main shaft 10502 close to the two ends are respectively sleeved with a lifting chain wheel 10505, bearing seats 10501 are respectively arranged on the main shaft 10502 on the inner side of the lifting chain wheel 10505, the driven gear 10504 is sleeved between the two bearing seats 10501 of the main shaft 10502 and corresponds to the position of the driving gear 10507, and the driven gear 10504 can drive the main shaft 10502 to rotate. As shown in fig. 10, a motor connecting plate 10503 is fixedly connected to the speed reducer 10508, and the motor unit 105 is fixedly connected to the top of the vehicle body 4 through a bearing housing 10501 and the motor connecting plate 10503.

The motor assembly 105 drives the main shaft 10502 to rotate through the driving gear 10507 and the driven gear 10504, and the main shaft 10502 drives the lifting chain wheel 10505 at the two ends and the first transmission chain 101 on the lifting chain wheel 10505 to rotate, so as to complete the lifting action. Servo motor 10509 combines with the encoder, and control is accurate, can accomplish not co-altitude's the demand of getting goods, and can accomplish positive and negative direction rotation to control hoist mechanism 1's rising and decline.

The fixed gantry 111 is further provided with a position sensor 102, and the position sensor 102 integrates three sensors together, wherein two limit position sensors play a role of safety protection, and the other origin position sensor is used for calibrating the servo motor 10509.

The lifting mechanism 1 adopts the motor assembly 105 to provide lifting power, is simple in structure, accurate in positioning and simple and rapid in maintenance, reduces the volume and weight of the whole AGV trolley, and avoids the oil leakage pollution of the traditional hydraulic system.

As shown in fig. 8, a plate type telescopic fork 5 is fixedly connected to the luggage carrier 106, and the plate type telescopic fork 5 includes a horizontally disposed mounting plate 504, a rotation speed reducing motor 507 fixedly connected to the mounting plate 504, a driving rotation gear 506 mounted on an output shaft of the rotation speed reducing motor 507, a driven rotation gear 503 engaged with the driving rotation gear 506, and a fork assembly disposed on the driven rotation gear 503; a rotation shaft of the driven rotation gear 503 is fixed to the mounting plate 504, and the rotation shaft is provided in a vertical direction of the mounting plate 504; the pallet fork assembly comprises a rotating support 505, and the rotating support 505 is fixedly connected with the driven rotating gear 503; an expansion bracket 502 is fixedly connected to the rotating support 505, and a cargo fork plate 501 is slidably connected to the expansion bracket 502. The mounting plate 504 is fixedly coupled to the carrier rack 106.

Fork truck formula AGV among the prior art, its hoist mechanism 1 passes through the fork truck repacking more or for single-column portal promotion mode, and the focus skew of this kind of structure, to direction configuration design and installation accuracy requirement very high, and because of the focus skew, has great influence to whole automobile body rigidity and promotion stability, and its power device adopts hydraulic system more moreover, is limited by hydraulic pressure rod-type elevating system's structure, and it promotes highly limitedly. This embodiment adopts frame-type portal to promote, and the focus is placed in the middle, and equipment is straight going, is turned and gets and put goods more steady, promotes the height and is not restricted.

As shown in fig. 9, hoist mechanism 1 is located the edge of 4 top one sides of automobile body, with hoist mechanism 1 opposite side edge is provided with on-vehicle buffering storehouse 3, on-vehicle buffering storehouse 3 is one side open-ended cuboid structure, and its opening direction orientation hoist mechanism 1 sets up, the both sides wall internal surface of the 3 vertical directions in on-vehicle buffering storehouse is equipped with at least a set of luggage carrier 301, be equipped with a plurality of joint positions on the both sides wall internal surface, luggage carrier 301 can follow vertical direction and reciprocate to joint in joint position department to adapt to the goods 2 of different specifications, adjust luggage carrier 301's height.

On-vehicle buffer memory storehouse 3 provides the space for the access of target goods, can keep in goods 2 on appointed load carrier 301 after the fork subassembly is got goods, and load carrier 301's position can freely be adjusted, makes on-vehicle buffer memory storehouse 3 not receive the restriction of 2 sizes of goods, can access the goods 2 of multiple specification, makes the suitability of AGV dolly stronger. The vehicle-mounted buffer storage warehouse 3 and the lifting mechanism 1 are respectively positioned at two sides of the vehicle body 4 and in different spaces, and the interference phenomenon can not occur when the goods 2 are operated.

The working principle of the embodiment is as follows: the fixed gantry 111 is fixed on the upper surface of the vehicle body 4 by a support frame 113, and the fixed gantry 111 serves as a fixed frame of the lifting mechanism 1 and provides a stable support for the lifting mechanism 1. During operation, the servo motor 10509 starts, drives speed reducer 10508, and speed reducer 10508 output shaft drives driving gear 10507 rotatory, and driving gear 10507 drives driven gear 10504 rotatory, and driven gear 10504 drives main shaft 10502 and two lifting sprocket 10505 rotations at main shaft 10502 both ends to drive first drive chain 101 and accomplish the lift and the decline work of lifting portal 116. The lifting portal 116 ascends or descends along the fixed portal 111 through the fixed guide wheel 118 and the movable guide wheel 117, the ascending or descending of the lifting portal 116 provides power for the second transmission chain 103, because one end of the second transmission chain 103 is fixedly connected with the fixed portal 111 and the other end is connected with the carrier rack 106, when the lifting portal 116 ascends or descends, the carrier rack 106 moves up and down at twice speed relative to the lifting portal 116, and the two sides of the carrier rack 106 are guided by the linear guide rail on the lifting portal 116 when moving up and down, thereby ensuring the smooth operation of the carrier rack 106.

The rotation speed reducing motor 507 of the telescopic fork 5 drives the driving rotary gear 506 to rotate, the driving rotary gear 506 drives the driven rotary gear 503 engaged with the driving rotary gear to rotate, and the driven rotary gear 503 drives the fork assembly fixedly connected with the driven rotary gear 503 to rotate.

The goods carrier 106 moves up and down to drive the telescopic fork 5 fixedly connected with the goods carrier to complete up-and-down operation so as to access the goods 2 at different heights, the telescopic fork 5 can rotate in the circumferential direction by 180 degrees, the fork assembly can adjust the goods taking direction according to the direction of the goods 2, the goods 2 are temporarily stored in the vehicle-mounted buffer storage bin 3 after the goods 2 are taken from two side faces and rotate by 90 degrees, and when the goods carrier travels to the specified position of a roadway, the goods 2 are continuously taken or placed at the specified position. The whole process of turning to only needs flexible fork 5 to accomplish, and need not whole AGV dolly whole rotatory, has saved the required space that turns to of rotatory whole car, can satisfy intensive storage system's space demand, and AGV dolly accessible automatic control system accomplishes the access free switching instruction of many casees goods 2, has improved the work efficiency of AGV dolly greatly.

The double-drive AGV trolley provided by the embodiment of the utility model adopts the flexible suspension double-drive wheel drive oblique symmetrical layout, and the four auxiliary universal wheels 9 are distributed in four corners, so that the actions of advancing, retreating, in-situ steering and the like can be realized by adjusting the angles and speeds of the two drive wheels 705; even the turning motion with radius at any point can be realized, the flexibility is strong, the auxiliary guiding is more stable, and the omnidirectional driving can be realized.

The utility model discloses AGV dolly adopts magnetic navigation, and RFID card location is nevertheless not restricted to this kind of mode, and modes such as laser navigation, vision navigation, inertial navigation can all be applied to the utility model discloses a dolly.

The embodiment of the utility model provides an adopt the frame-type to promote the direction mode, equipment focus overall arrangement placed in the middle, equipment is straight going, is turned and is got and put goods more steady. The lifting system adopts a lifting mode of a motor-driven multistage chain with accurate positioning, simple and rapid maintenance and multiple protection.

The utility model discloses rotatable fork formula fork of forking can realize the getting of free height and put the goods to and freely get on the loading frame 301 and put the goods, not receive the restriction of space and order, reduce the design degree of difficulty in the aspect of automatically controlled and software queue.

The utility model discloses the flexible fork 5 that carries on is not only limited to the fork formula fork of getting, is applicable to simultaneously and presss from both sides embracing formula fork. The form of goods is got and put to the side direction, is applicable to the operation of driving in the narrow roadway, reduces automobile-used space, increases the storage space of on-vehicle buffer memory storehouse 3, improves the storage capacity availability factor.

The lifting mechanism 1 of this embodiment may further include a lifting limit protection device and a goods pick-and-place protection device, so as to more effectively ensure safe and reliable operation of the apparatus.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a dual drive AGV dolly, includes automobile body, wheel and drive wheel subassembly at least, wheel and drive wheel subassembly fixed mounting in on the chassis of automobile body bottom, its characterized in that: the two groups of driving wheel assemblies are respectively arranged close to two ends of the bottom of the vehicle body in the length direction; the driving wheel assembly comprises a fixed plate, a driving wheel which is rotatably fixed below the fixed plate and connected with the fixed plate into a whole, a spring buffer mechanism fixedly connected with the fixed plate and a guide mechanism in sliding connection with the fixed plate;

the guide mechanism comprises a guide rod and a guide bearing, and the guide rod can slide up and down along the inner wall of the guide bearing; the top of the guide rod is fixedly connected with the fixed plate, the guide bearing is fixedly connected with the chassis, and the fixed plate can move up and down by the guide rod sliding up and down along the guide bearing;

the spring buffer mechanisms are arranged below the fixed plate, are two in number and are respectively positioned at two sides of the driving wheel; the spring pull rod is sleeved on the part of the spring pull rod below the chassis, the spring is always in a compressed state, a downward driving force is provided for one end of the spring pull rod penetrating through the chassis, and then a downward moving power is provided for the fixing plate;

and the side surface of the vehicle body is provided with an anti-collision strip.

2. A dual drive AGV cart according to claim 1, further comprising: the number of the guide mechanisms is four, the guide mechanisms are respectively arranged at four corners of the fixed plate and are positioned around the driving wheel.

3. A dual drive AGV cart according to claim 1, further comprising: the top of the trolley body is fixedly connected with a lifting mechanism, and the lifting mechanism comprises a fixed door frame, a lifting door frame in sliding connection with the fixed door frame, a motor assembly, a carrier frame in sliding connection with the lifting door frame and a first transmission device; the fixed portal frame is fixed on the top of the trolley body, and the motor assembly drives the first transmission device to drive the lifting portal frame to move up and down along the fixed portal frame.

4. A dual drive AGV cart according to claim 3, further including: the first transmission device comprises a first transmission chain, a fixed chain wheel fixed on the fixed door frame and a lifting chain wheel arranged on the motor assembly, the first transmission chain is sleeved on the fixed chain wheel and the lifting chain wheel and is fixedly connected with the lifting door frame, and the first transmission device drives the lifting door frame to move up and down; the lifting mechanism further comprises a second transmission device, the second transmission device comprises a second transmission chain and a movable chain wheel fixed on the lifting door frame, one end of the second transmission chain is fixedly connected with the fixed door frame, the other end of the second transmission chain penetrates through the movable chain wheel to be fixedly connected with the object carrier, and the second transmission device drives the object carrier to move up and down by taking the up-and-down movement of the lifting door frame as lifting power.

5. A dual drive AGV cart according to claim 3, further including: the motor assembly comprises a servo motor, a speed reducer connected to an output shaft of the servo motor, a driving gear sleeved on the output shaft of the speed reducer, a driven gear meshed with the driving gear, and a spindle assembly fixedly connected with the driven gear;

the main shaft assembly comprises a main shaft, the positions, close to the two ends, of the main shaft are respectively sleeved with a lifting chain wheel, bearing seats are respectively arranged on the main shaft on the inner side of the lifting chain wheel, a driven gear is sleeved on the position, corresponding to the driving gear, of the main shaft, and the driven gear can drive the main shaft to rotate.

6. A dual drive AGV cart according to claim 3, further including: and a bidirectional guide wheel is arranged between the lifting door frame and the fixed door frame, and the lifting door frame moves up and down along the fixed door frame through the bidirectional guide wheel.

7. A dual drive AGV cart according to claim 3, further including: the lifting mechanism is fixedly connected with a telescopic fork, and the telescopic fork comprises a horizontally arranged mounting plate, a rotary speed reducing motor fixedly connected with the mounting plate, a driving rotary gear arranged on an output shaft of the rotary speed reducing motor, a driven rotary gear meshed with the driving rotary gear, and a fork assembly arranged on the driven rotary gear; a rotating shaft of the driven rotating gear is fixed on the mounting plate, and the rotating shaft is arranged along the vertical direction of the mounting plate; the pallet fork assembly comprises a rotary support, and the rotary support is fixedly connected with the driven rotary gear; the rotary support is fixedly connected with an expansion bracket, and the expansion bracket is connected with a cargo fork plate in a sliding manner.

8. A dual drive AGV cart according to claim 7, further including: the lifting mechanism is located at the edge of one side of the top of the vehicle body, an on-vehicle cache warehouse is arranged at the edge of the other side, opposite to the lifting mechanism, of the lifting mechanism, the on-vehicle cache warehouse is of a cuboid structure with an opening at one side, the opening direction of the on-vehicle cache warehouse faces towards the lifting mechanism, at least one group of load carriers are arranged on the inner surfaces of the two side walls of the on-vehicle cache warehouse in the vertical direction, and the height of the load carriers can be adjusted.

9. A dual drive AGV cart according to claim 1, further comprising: the two groups of driving wheel assemblies are respectively positioned on two sides of the central line of the car body in the length direction.

10. A dual drive AGV cart according to claim 1, further comprising: obstacle avoidance sensors are respectively arranged at the opposite corners of the side surface of the vehicle body.

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