CN211140476U - Freight trolley and warehousing system - Google Patents

Abstract

The utility model relates to a commodity circulation technical field, in particular to freight dolly and warehouse system. The utility model discloses a freight trolley includes: a vehicle body; the cargo access mechanism is telescopically arranged on the vehicle body and is used for accessing cargos; and the two driving wheel mechanisms are arranged on the two opposite sides of the trolley body along the left and right directions, the two driving wheel mechanisms synchronously rotate to realize the walking of the freight trolley, and the two driving wheel mechanisms rotate at different speeds to realize the steering of the freight trolley. Based on this, can effectively improve goods circulation efficiency.

Description

Freight trolley and warehousing system

Technical Field

The utility model relates to a commodity circulation technical field, in particular to freight dolly and warehouse system.

Background

In the field of logistics, goods are often transported by using freight trolleys such as shuttle cars or AGV trolleys. Among the prior art, the shuttle passes through the goods on telescopic goods access mechanism transport certain layer goods shelves, but it can only go straight line on certain layer goods shelves, and the operation flexibility is relatively poor, and the AGV dolly generally can only be subaerial operation, and generally realizes freight through the less goods shelves of direct transport specification, and not only the range of application is less, also has the low scheduling problem of storage density simultaneously, and this all influences goods circulation efficiency.

Disclosure of Invention

The utility model discloses a technical problem who solves does: the goods circulation efficiency is improved.

In order to solve the technical problem, the utility model provides a freight trolley, it includes:

a vehicle body;

the cargo access mechanism is telescopically arranged on the vehicle body and is used for accessing cargos; and

the two driving wheel mechanisms are arranged on the two opposite sides of the trolley body in the left-right direction, the two driving wheel mechanisms rotate synchronously to realize the walking of the freight trolley, and the two driving wheel mechanisms rotate in a differential manner to realize the steering of the freight trolley.

In some embodiments, the driving wheel mechanism includes a driving wheel and a reduction motor, the reduction motor is in driving connection with the driving wheel, and the driving wheel rotates under the driving action of the reduction motor.

In some embodiments, the cargo trolley further comprises a suspension plate, a spring and a pressing plate, the driving wheel mechanism is connected between the first end and the second end of the suspension plate, the first end of the suspension plate is rotatably connected with the trolley body, the spring is arranged at the second end of the suspension plate, the pressing plate is connected with the trolley body and is pressed on the spring, the suspension plate and the pressing plate are respectively provided with a first column body and a second column body, and the first column body and the second column body are inserted into the spring from two ends of the spring and are spaced from each other.

In some embodiments, the suspension plate is further provided with a limiting hole, and the freight trolley further comprises a limiting pin connected with the trolley body, wherein the limiting pin is inserted into the limiting hole and limits the swinging stroke of the driving wheel mechanism around the rotating axis of the first end of the suspension plate.

In some embodiments, the cargo access mechanism includes two cargo access units disposed on opposite sides of the vehicle body in the front-rear direction, and the cargo access unit includes a telescopic driving mechanism and a telescopic structure having at least one section of telescopic arm, and the telescopic driving mechanism drives the telescopic arm structure to telescope in the left-right direction relative to the vehicle body.

In some embodiments, the telescopic structure is provided with a first tooth part, the telescopic driving mechanism comprises an annular belt, and the annular belt is provided with a second tooth part, and the first tooth part is meshed with the second tooth part.

In some embodiments, the cargo access unit further comprises a tensioning mechanism, the tensioning mechanism comprises an eccentric shaft and a bearing, the eccentric shaft comprises a first shaft part and a second shaft part which are connected with each other, a shaft hole is formed in the vehicle body, the first shaft part is matched with the shaft hole, the second shaft part is eccentrically arranged relative to the first shaft part, and the bearing sleeve is arranged on the second shaft part and is in contact with the annular belt.

In some embodiments, the tensioning mechanism further comprises a clamping plate, a first fastening piece and a second fastening piece, the clamping plate is provided with a connecting hole, one end, far away from the second shaft portion, of the first shaft portion is inserted into the connecting hole and locked by the first fastening piece, the clamping plate is further provided with a fixing hole, the fixing hole is an oblong hole, the vehicle body is provided with a plurality of threaded holes which are circumferentially distributed along the shaft hole and matched with the fixing hole, and the second fastening piece penetrates through the fixing hole and the threaded holes to fix the clamping plate on the vehicle body.

In some embodiments, the opposite side surfaces of the first shaft portion are flat surfaces, and the connection hole has a flat hole wall, the flat hole wall of the connection hole mating with the flat surface of the first shaft portion.

In some embodiments, the at least one telescopic arm includes a first arm section and a second arm section, and the telescopic structure further includes a linkage mechanism, the first arm section is slidably connected to the vehicle body, the second arm section is slidably connected to the first arm section, and the linkage mechanism connects the first arm section and the second arm section and drives the second arm section to extend and retract in the left-right direction relative to the first arm section when the first arm section extends and retracts relative to the vehicle body.

In some embodiments, the telescopic distance of the second arm section relative to the first arm section is at least one time the telescopic distance of the first arm section relative to the vehicle body under the action of the linkage mechanism.

In some embodiments, the linkage mechanism includes a first belt pulley, a second belt pulley, and a second belt pulley, the first belt pulley and the second belt pulley are fixed on the first arm section and sequentially arranged along the retracting direction, a first end of the first belt pulley and a first end of the second belt pulley are respectively connected with two ends of the vehicle body along the extending direction, and a second end of the first belt pulley is respectively wound around the first belt pulley and the second belt pulley and respectively connected with two ends of the second arm section along the extending direction.

In some embodiments, the cargo access unit further comprises a finger rotatably disposed on a last telescoping arm of the at least one telescoping arm.

In some embodiments, the cart further includes guide wheels disposed on the body and configured to guide the cart by engaging the side walls of the track.

The utility model discloses another aspect still provides a storage system, it includes goods shelves and the utility model discloses a freight dolly, freight dolly are used for the goods on the access goods shelves.

The utility model discloses a function in an organic whole of freight dolly collection shuttle and AGV dolly, the operation flexibility is higher, and the range of application is wider, and storage density is higher, can effectively improve goods circulation efficiency.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 shows an overall structure diagram of a freight car according to an embodiment of the present invention when the cargo access mechanism is in a retracted state.

Fig. 2 shows a schematic view of the overall structure of the freight car shown in fig. 1 with the cargo access mechanism in an extended state.

Fig. 3 shows a schematic view of the structure of the cargo access unit.

Fig. 4 shows a schematic structural view of the tensioning mechanism.

Fig. 5 shows a longitudinal cut through the clamping plate of fig. 4 at the junction with the eccentric shaft.

Fig. 6 shows a perspective view of the drive wheel mechanism.

Fig. 7 shows a front view of fig. 6.

Fig. 8 shows a cross-sectional view a-a of fig. 7.

Fig. 9 shows a sectional view B-B of fig. 7.

In the figure:

100. a freight car; 200. goods;

1. a vehicle body; 11. a first plate body; 12. a second plate body; 121. a shaft hole; 122. a threaded hole; 13. a reinforcing plate; 14. a support plate;

2. a drive wheel mechanism; 21. a drive wheel; 22. a reduction motor; 231. a suspension plate; 231a, a first cylinder; 232. a fixing plate; 233. a connecting pin; 234. a spring; 235. pressing a plate; 235a, a second column; 236. a limiting hole; 237. a spacing pin; 238. a bushing;

31. a load wheel; 32. a guide wheel;

41. a first guide rail pair; 42. a second guide rail pair;

5. a cargo access mechanism; 5a, a goods access unit; 51. a first arm section; 511. a first tooth portion; 521. a motor; 522. a speed reducer; 523. a connecting shaft; 524. a driving pulley; 525. an endless belt; 525a, a second tooth; 526. a driven pulley; 53. a second arm section; 541. a first conveyor belt; 542. a first pulley; 543. a second pulley; 544. a second conveyor belt; 55. a pusher dog; 56. a tensioning mechanism; 561. an eccentric shaft; 561a, a first shaft; 561b, a second shaft part; 5611. a planar portion; 562. a bearing; 563. a first fastener; 564. a clamping plate; 564a, a connection hole; 564b, a fixation hole; 565. a second fastener.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled person in the art without developing the creative work belong to the protection scope of the present invention.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are only used for the convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, should not be interpreted as limiting the scope of the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1-9 show one embodiment of the freight car of the present invention.

For convenience of description, in the present invention, the directions or positional relationships indicated by the directional terms such as "front, rear, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are defined based on the directions or positional relationships when the cart is traveling, wherein the forward direction of the cart is defined as the front, and the forward direction of the cart is defined as the rear, left and right, wherein the forward and backward directions are indicated by coordinate axis X in fig. 1, the left and right directions are indicated by coordinate axis Y in fig. 1, and the up and down directions are indicated by coordinate axis Z; the terms of orientation "inside" and "outside" refer to the inside and outside of the profile of each component; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Referring to fig. 1-9, the present invention provides a freight car 100, comprising:

a vehicle body 1;

the cargo access mechanism 5 is telescopically arranged on the vehicle body 1 and is used for accessing the cargo 200; and

the two driving wheel mechanisms 2 are arranged on two opposite sides of the trolley body 1 along the left-right direction Y, the two driving wheel mechanisms 2 rotate synchronously to realize walking of the freight trolley 100, and the two driving wheel mechanisms 2 rotate in a differential manner to realize steering of the freight trolley 100.

Based on telescopically setting up the goods access mechanism 5 at automobile body 1, the utility model discloses a freight dolly 100 can be as the same flexible goods of getting of current shuttle, simultaneously, based on setting up two driving wheel mechanisms 2 on automobile body 1 and constituting differential train, the utility model discloses a freight dolly 100 can walk and turn to as the same freedom of current AGV dolly again, consequently, the utility model discloses a freight dolly 100 uses the flexibility higher, and the range of application is wider, is favorable to realizing the goods storage of higher density to can effectively improve goods circulation efficiency.

In some embodiments, as shown in fig. 2, the vehicle body 1 may include two first panels 11 and two second panels 12, the two first panels 11 are oppositely disposed along the left-right direction at intervals, the two second panels 12 are oppositely disposed along the front-back direction at intervals, and the two first panels 11 and the two second panels 12 are sequentially connected end to end, so that the vehicle body 1 forms a frame structure which is open at the top and the bottom and has a hollow interior, thereby facilitating the arrangement of other structural components of the wagon 100, making the wagon 100 more compact, and reducing the weight of the wagon 100. Meanwhile, a reinforcing plate 13 is further disposed at the joint of the first plate body 11 and the second plate body 12 to enhance the connection strength.

The two driving wheel mechanisms 2 are respectively arranged on the two first plate bodies 11 to realize the relative arrangement of the two along the left-right direction, and the two structures are the same to simplify the structure. In some embodiments, as shown in fig. 6, the driving wheel mechanism 2 includes a driving wheel 21 and a reduction motor 22, the reduction motor 22 is in driving connection with the driving wheel 21, and the driving wheel 21 is rotated by the driving action of the reduction motor 22. Specifically, the driving wheel 21 is located outside the first plate 11 and rotatably connected to the first plate 11, and the reduction motor 22 is located inside the first plate 11 and has an output shaft connected to the driving wheel 21. Thus, under the driving of the two driving wheel mechanisms 2, the freight car 100 can walk on the ground or on the track in a straight line, and can also steer on the ground or on the track in a differential speed.

The reduction motor 22 is adopted to drive the driving wheel 21 to rotate, so that the space occupied by the driving wheel mechanism 2 can be reduced, and the miniaturization of the freight trolley 100 is facilitated. The reduction motor 22 is arranged inside the vehicle body 1, so that the internal space of the vehicle body 1 can be fully utilized, the structure is more compact, and the appearance is more attractive.

In addition, as shown in fig. 1 and fig. 2, in some embodiments, the cargo car 100 further includes a bearing wheel 31 and a guide wheel 32 disposed on the car body 1, wherein the rotation axis of the bearing wheel 31 is along a horizontal direction for supporting, and the rotation axis of the guide wheel 32 is along a vertical direction for cooperating with a side wall of a rail to guide the cargo car 100. Specifically, as shown in fig. 2, the bearing wheels 31 and the guide wheels 32 are disposed on the second board body 12 of the vehicle body 1, more specifically, two bearing wheels 31 and two guide wheels 32 are disposed on each second board body 12, and for the same second board body 12, the two bearing wheels 31 are disposed at both ends of the second board body 12 in the left-right direction, and the two guide wheels 32 are also disposed at both ends of the second board body 12 in the left-right direction, so that the bearing wheels 31 and the guide wheels 32 are disposed at four corners of the vehicle body 1.

Based on the arrangement, in the running process of the freight trolley 100, the four bearing wheels 31 can play an auxiliary supporting role on the trolley body 1, so that the freight trolley 100 is prevented from tilting, and the freight trolley 100 can run more stably together with the driving wheel mechanism 2; the four guide wheels 32 are in contact with the side walls of the rails to guide the freight trolley 100, so that the deviation rectifying effect is achieved, and particularly, even if the freight trolley 100 cannot enter the guide rails depending on the self-positioning accuracy, the freight trolley can still align the positions under the guiding effect of the guide wheels 32 and the side walls of the rails, and can smoothly enter the rails.

In some embodiments, as shown in fig. 6 to 9, the cargo cart 100 further includes a vibration damping mechanism, the vibration damping mechanism is disposed in one-to-one correspondence with the driving wheel mechanism 2 and includes a suspension plate 231, a spring 234, and a pressing plate 235, the driving wheel mechanism 2 is connected between a first end and a second end of the suspension plate 231, the first end of the suspension plate 231 is rotatably connected to the cart body 1, the spring 234 is disposed at the second end of the suspension plate 231, the pressing plate 235 is connected to the cart body 1 and is pressed against the spring 234, and a first cylinder 231a and a second cylinder 235a are disposed on the suspension plate 231 and the pressing plate 235, respectively, and the first cylinder 231a and the second cylinder 235a are inserted into the spring 234 from both ends of the spring 234 and are spaced apart from. Based on this, driving wheel mechanism 2 can swing around the axis of rotation of suspension plate 231 first end, and freight trolley 100 can adapt to the fluctuation of the load bearing surface who bears freight trolley 100 better, and the spring 234 of vertical arrangement between suspension plate 231 second end and clamp plate 235 can play the supporting role when driving wheel mechanism 2 swings, effectively reduces freight trolley 100's vibrations, strengthens freight trolley 100's anti-seismic performance, improves freight trolley 100's the stationarity of traveling.

Moreover, two spaced apart cylinders (i.e., the first cylinder 231a and the second cylinder 235a) are inserted into the spring 234 to support the spring 234, so that the structure is simpler and the abrasion of the middle portion of the spring 234 can be reduced, compared to the case where a single cylinder penetrates the spring 234. The first cylinder 231a may be a unitary structure with the suspension plate 231; the second cylinder 235a may be a unitary structure with the pressure plate 235.

In which, in order to achieve rotatable coupling of the first end of the suspension plate 231 with the vehicle body 1, as shown in figures 6 and 8, in some embodiments, the vehicle body 1 (specifically, the first plate 11) is provided with a first hole, the first end of the hanging plate 231 is correspondingly provided with a second hole, meanwhile, the damping mechanism further comprises a fixing plate 232 and a connecting pin 233, a third hole is correspondingly arranged on the fixing plate 232, the fixing plate 232 is connected with the vehicle body 1, for example, the fixing plate 232 may be fixed to the first plate body 11 of the vehicle body 1 by a coupling member such as a screw, and the coupling pin 233 passes through the first hole, the second hole, and the third hole, to hinge the first end of the suspension plate 231 to the vehicle body 1, so that the first end of the suspension plate 231 may rotate with respect to the vehicle body 1, thereby allowing the driving wheel 21 to swing about the hinge point (corresponding to the axis of the connecting pin 233) of the first end of the suspension plate 231 to accommodate the uneven bearing surface. Specifically, as can be seen in fig. 8, a bushing 238 is installed in the third bore, and the connecting pin 233 also passes through the bushing 238. More specifically, two bushings 238 are respectively provided on both sides of the suspension plate 231. The liner 238 may be an oil-free liner.

In order to connect the pressing plate 235 with the vehicle body 1, as shown in fig. 6 and 9, in some embodiments, the pressing plate 235 is fixed on the first plate 11 of the vehicle body 1 by a connecting member such as a screw, so that the pressing plate 235 can firmly and stably limit the spring 234, and together with the suspension plate 231, the spring 234 is effectively prevented from falling out.

In addition, as shown in fig. 6 and 7, in some embodiments, the suspension plate 231 is further provided with a limit hole 236, and the damping mechanism further includes a limit pin 237 connected to the vehicle body 1, the limit pin 237 is inserted into the limit hole 236 and limits the swing stroke of the driving wheel mechanism 2 around the rotation axis of the first end of the suspension plate 231, which can prevent the driving wheel 21 from swinging too much when the cargo truck 100 is in the transportation state or the driving wheel 21 is in the suspended state, improve the running stability of the cargo truck 100, prevent the spring 234 from falling off due to the too much swing amplitude of the driving wheel 21, and enhance the structural stability.

Specifically, as can be seen from fig. 7, the limiting hole 236 is a waist-shaped hole having an arc-shaped waist line, and the arc-shaped waist line of the waist-shaped hole uses the rotation center of the first end of the suspension plate 231 as the center of circle, so that in the swinging process of the driving wheel mechanism 2, the limiting hole 236 guides the limiting pin 237 to move along a similar arc-shaped track, thereby achieving a more effective limiting effect.

In addition, in order to facilitate the cargo access mechanism 5 to access the cargo 200, as shown in fig. 2, the cargo access mechanism 5 includes two cargo access units 5a, the two cargo access units 5a are disposed on the vehicle body 1 along the front-back direction X on opposite sides (specifically disposed on the two second plate bodies 12), and the cargo access unit 5a includes a telescopic driving mechanism and a telescopic structure having at least one section of telescopic arm, and the telescopic driving mechanism drives the telescopic arm structure to extend and retract along the left-right direction relative to the vehicle body 1. Based on this, when the freight trolley 100 travels to the position corresponding to a certain goods position, the telescopic structures of the two goods access units 5a can be extended out, the goods 200 are transferred from the freight trolley 100 to the goods shelf, the stock process is realized, or the goods 200 can be transferred from the goods position to the freight trolley 100, the goods taking process is realized, after the access process is finished, the telescopic structures of the two goods access units 5a can be retracted, so that the freight trolley 100 can freely travel along the track without being restricted by the goods shelf.

The number of the telescopic arm in the telescopic structure can be one section, two sections or multiple sections so as to realize one-stage, two-stage or multi-stage telescopic. Specifically, in the illustrated embodiment, the telescopic structure includes two telescopic arms, namely a first arm section 51 and a second arm section 53, wherein the first arm section 51 is slidably connected to the vehicle body 1, and the second arm section 53 is slidably connected to the first arm section 51. More specifically, as shown in fig. 3, the first arm section 51 is slidably connected to the second plate 12 through the first rail pair 41, and the second arm section 53 is slidably connected to the first arm section 51 through the second rail pair 42. Like this, under telescopic drive mechanism's drive, the extending structure can realize that the two-stage is flexible, both can satisfy the goods access demand of most goods shelves, can simplify the structure again, reduce cost.

In addition, the telescopic arm may adopt a plate structure or a beam structure, for example, in the illustrated embodiment, the first arm section 51 and the second arm section 53 both adopt a plate structure, in other words, the first arm section 51 is a first telescopic plate, and the second arm section 53 is a second telescopic plate, so that the connection between the telescopic structure and the vehicle body 1 is facilitated, and meanwhile, in the cargo transportation process, the telescopic structure and the cargo 200 can be in plane contact, so that the contact area is large, and the cargo transportation process is more stable and reliable. As shown in fig. 2 and 3, the height of the second arm section 53 is larger than the height of the first arm section 51 and the second plate 12, and the second arm section 53 is a telescopic arm having a telescopic structure and is in direct contact with the cargo 200 during the cargo transportation process, so that the second arm section 53 is set to have a larger height, and the cargo 200 can be more reliably held during the cargo transportation process, the risk of dropping the cargo 200 is reduced, and particularly the risk of dropping the cargo 200 from both the front and rear sides can be reduced.

The retractable structure can be used to access the goods 200 in a manner similar to a forklift. As shown in fig. 2 and 3, in some embodiments, the cargo access unit 5a further comprises a finger 55, and the finger 55 is rotatably disposed on the last telescopic arm of all telescopic arms of the telescopic structure. Specifically, two fingers 55 are provided at both ends of the second arm section 53 in the left-right direction (i.e., the telescopic direction), and are each rotatably provided with respect to the second arm section 53. Based on this, at the in-process that extending structure stretches to goods 200, pusher dog 55 can transfer to vertical position to avoid because of interfering with goods 200, and influence extending structure stretches out and targets in place, and getting goods or freight in-process, pusher dog 55 can transfer to horizontal position again, carry on spacingly to goods 200, can not only keep goods 200 more steadily on freight trolley 100 at freight in-process, can also hug goods 200 to freight trolley 100 in getting goods in-process.

In order to drive the telescopic structure to extend and retract relative to the vehicle body 1, as shown in fig. 2 and 3, in some embodiments, the telescopic driving mechanism includes a motor 521, a speed reducer 522, a driving pulley 524, a driven pulley 526, and an endless belt 525, the motor 521 is in driving connection with the driving pulley 524 through the speed reducer 522, the endless belt 525 is sleeved on the driven pulley 526 and is in driving connection with the driving pulley 524 and the first arm joint 51, so that when the motor 521 rotates, the endless belt 525 can rotate around the driven pulley 524 under the driving of the driving pulley 524 to drive the first arm joint 51 to extend and retract.

The endless belt 525 may be engaged with the driving pulley 524 and the first arm segment 51 to realize a driving connection with the driving pulley 524 and the first arm segment 51. Specifically, as can be seen from fig. 3, the first arm section 51 is provided with a first tooth portion 511, the annular belt 52 is provided with a second tooth portion 525a, and the second tooth portion 525a is engaged with both the first tooth portion 511 and the tooth portions on the outer surface of the driving pulley 524, so that the driving pulley 524 can be in driving connection with the first arm section 51 through the annular belt 525, and when the annular belt 525 rotates under the action of the driving pulley 524, the rotation motion can be converted into the telescopic motion of the first arm section 51 through the engagement of the second tooth portion 525a and the first tooth portion 511, and the telescopic motion of the first arm section 51 relative to the vehicle body 1 is realized.

More specifically, as shown in fig. 3, the first tooth portion 511 is provided at a lower portion of the first arm section 51, the second tooth portion 525a is provided on an outer surface of the endless belt 525, the driving pulley 524 is located outside the endless belt 525 and in contact with the second tooth portion 525a, and the driven pulley 526 is located inside the endless belt 525. The second plate 12 is further provided with a support plate 14, and the support plate 14 is located inside the annular belt 525 and supports the annular belt 525 to further enhance the meshing reliability of the first tooth portion 511 and the second tooth portion 525 a.

The motor 521, the speed reducer 522, the driving pulley 524, and the driven pulley 526 are disposed on the vehicle body 1, the motor 521 and the speed reducer 522 are specifically located on an outer surface of the second board body 12, and the driving pulley 524 and the driven pulley 526 are specifically located on an inner surface of the second board body 12. As can be seen from fig. 3, the three driven pulleys 526 are arranged on the second plate 12 in a triangular layout to stably support and guide the endless belt 525.

In order to achieve synchronous rotation of the driving pulleys 524 of the two telescopic drive mechanisms, the two driving pulleys 524 are connected by the same connecting shaft 523 as shown in fig. 2. The reducer 522 may be a hollow reducer to reduce volume.

The extension and contraction of the second arm section 53 are realized by a linkage mechanism arranged between the first arm section 51 and the second arm section 53, and the linkage mechanism enables the second arm section 53 to extend and contract along with the first arm section 51 and stretch and contract relative to the first arm section 51 when the telescopic driving mechanism works, so that the telescopic efficiency is improved. The structure is simpler because it is not necessary to equip the second arm section 53 with a special power device such as a motor.

In some embodiments, the linkage mechanism is a double-range telescopic mechanism, which makes the telescopic distance of the second arm section 53 relative to the first arm section 51 at least one time longer than the telescopic distance of the first arm section 51 relative to the vehicle body 1, so as to accelerate the telescopic efficiency, increase the overall telescopic stroke of the telescopic structure, and meet the access requirement of the cargo 200 at a longer distance.

Specifically, as shown in fig. 3, the linkage mechanism includes a first belt 541, a first belt pulley 542, a second belt pulley 543, and a second belt 544, the first belt pulley 542 and the second belt pulley 543 are fixed to the first arm section 51 and are sequentially arranged along the retraction direction, a first end of the first belt 541 and a first end of the second belt 544 are respectively connected to two ends of the vehicle body 1 (specifically, the second plate 12) in the extension direction, and a second end of the first belt 541 and a second end of the second belt 544 respectively bypass the first belt pulley 542 and the second belt pulley 543 and are respectively connected to two ends of the second arm section 53 in the extension direction. Based on this, when the first arm section 51 extends under the driving of the telescopic driving mechanism, the second arm section 53 can extend together with the first arm section 51 under the action of the first conveyor belt 541, and simultaneously extend by the same distance relative to the first arm section 51, so that when the first arm section 51 extends by a certain distance relative to the vehicle body 1, the second arm section 53 can extend by 2 times of distance relative to the vehicle body 1, and double extension is realized; when the first arm section 51 retracts under the driving of the telescopic driving mechanism, the second arm section 53 can retract together with the first arm section 51 under the action of the second conveyor belt 544 and simultaneously retract relative to the first arm section 51 by the same distance, so that when the first arm section 51 retracts relative to the vehicle body 1 by a certain distance, the second arm section 53 can retract relative to the vehicle body 1 by 2 times, and complete retraction and reset are realized.

Meanwhile, as shown in fig. 3, in some embodiments, the cargo access unit 5a further includes a tensioning mechanism 56, and the tensioning mechanism 56 is disposed inside the endless belt 525 and is used for tensioning the endless belt 525 to prevent the endless belt 525 from being unable to effectively drive due to the stretching and loosening after a period of time, which affects the normal implementation of the cargo access function. The tensioning mechanism 56 can perform the tensioning function in a variety of ways, and in the illustrated embodiment, the tensioning mechanism 56 employs an eccentric configuration for tensioning.

Specifically, as can be seen from fig. 4 to 5, the tensioning mechanism 56 includes an eccentric axle 561 and a bearing 562, the eccentric axle 561 includes a first axle portion 561a and a second axle portion 561b connected to each other, the vehicle body 1 (specifically, the second plate 12) is provided with an axle hole 121, the first axle portion 561a is engaged with the axle hole 121, the second axle portion 561b is eccentrically disposed with respect to the first axle portion 561a, and the bearing 562 is sleeved on the second axle portion 561b and is in contact with the endless belt 525. On this basis, the eccentric axle 561 can exert a tensioning force on the endless belt 525 via the bearing 562, and by changing the angle of the eccentric axle 561, it is also possible to meet different tensioning requirements of the endless belt 525, so that the tensioning mechanism 56 can always effectively tension the endless belt 525.

In order to connect and fix the eccentric shaft 561, as shown in fig. 4 and 5, the tensioning mechanism 56 further includes a clamping plate 564, a first fastening member 563, and a second fastening member 565, the clamping plate 564 is provided with a connecting hole 564a, one end of the first shaft 561a, which is far away from the second shaft 561b, is inserted into the connecting hole 564a and is locked by the first fastening member 563, the clamping plate 564 is further provided with a fixing hole 564b, the fixing hole 564b is an elongated hole, the vehicle body 1 (specifically, the second plate 12) is provided with a plurality of threaded holes 122 circumferentially distributed along the shaft hole 121 and engaged with the fixing hole 564b, and the second fastening member 565 passes through the fixing hole 564b and the threaded hole 122 to fix the clamping plate 564 to the vehicle body 1 (specifically, the second plate 12). Wherein the first fastener 563 may be, for example, a nut; the second fastener 565 may be, for example, a screw.

Based on the above arrangement, under the action of the second plate 12, the clamping plate 564, the first fastening member 563 and the second fastening member 565, the eccentric axle 561 can be fixed to the vehicle body 1, and can be maintained at a desired angle, the endless belt 525 is tensioned, and when the endless belt 525 is loosened, the second fastening member 565 and the first fastening member 563 can be removed, and the installation angle of the eccentric axle 561 is adjusted, and the endless belt 525 is re-tensioned, in the process, the clamping plate 564 is also changed in position, after the eccentric axle 561 is adjusted in position, the clamping plate 564 is fixed to the threaded hole 122 near the position by the second fastening member 565, and the first fastening member 563 is locked again, so that the fixing of the eccentric axle 561 after the installation angle is changed can be realized.

The fixing holes 564b are configured as oblong holes to more conveniently cooperate with the respective threaded holes 122 to prevent the rotation of the clamping plate 564.

Also, as shown in fig. 5, the outer surface of the first shaft portion 561a is not entirely an arc surface, but has two opposite side surfaces (corresponding to the plane portions 5611 marked in fig. 5) that are planes, and the connection hole 564a has a plane hole wall, and the plane hole wall of the connection hole 564a is matched with the plane surface of the first shaft portion 561 a. This facilitates the clamping plate 564 to clamp and fix the first shaft portion 561a more reliably.

The utility model discloses a freight dolly 100, simple structure to collect AGV dolly function and shuttle function in an organic whole, both can be in subaerial operation, also can go lifting machine department, promote to certain one deck goods shelves by the lifting machine on, move on the goods shelves track, and the operation in-process, both can straight line go, also can turn to, and when moving to certain goods position, can realize again that flexible getting goods function has higher use flexibility.

Will the utility model discloses a freight dolly 100 is applied to the warehouse system in, can effectively increase storage density, improves storage efficiency, reduces the storage cost. Therefore, the utility model also provides a storage system, it includes goods shelves and the utility model discloses a freight car 100. The warehousing system can be a three-dimensional warehouse, and higher-density storage is realized.

The above description is only exemplary embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. A freight car (100), comprising:

a vehicle body (1);

the cargo access mechanism (5) is telescopically arranged on the vehicle body (1) and is used for accessing cargos (200); and

two driving wheel mechanisms (2), two driving wheel mechanisms (2) set up the relative both sides of the edge left right direction (Y) of automobile body (1), two driving wheel mechanisms (2) synchronous revolution realize the walking of freight dolly (100), just two driving wheel mechanism (2) differential rotation realize the turning to of freight dolly (100).

2. The freight trolley (100) according to claim 1, characterized in that the driving wheel mechanism (2) comprises a driving wheel (21) and a reduction motor (22), the reduction motor (22) is in driving connection with the driving wheel (21), and the driving wheel (21) is rotated under the driving action of the reduction motor (22).

3. The freight car (100) according to claim 1, characterised in that the freight car (100) further comprises a suspension plate (231), a spring (234) and a pressure plate (235), the driving wheel mechanism (2) is connected between the first end and the second end of the suspension plate (231), the first end of the suspension plate (231) is rotatably connected with the vehicle body (1), the spring (234) is arranged at the second end of the suspension plate (231), the pressing plate (235) is connected with the vehicle body (1) and is pressed on the spring (234), and the suspension plate (231) and the pressure plate (235) are respectively provided with a first cylinder (231a) and a second cylinder (235a), the first cylinder (231a) and the second cylinder (235a) are inserted into the spring (234) from both ends of the spring (234) and spaced apart from each other.

4. The freight trolley (100) as claimed in claim 3, wherein the suspension plate (231) is further provided with a limiting hole (236), and the freight trolley (100) further comprises a limiting pin (237) connected to the trolley body (1), wherein the limiting pin (237) is inserted into the limiting hole (236) and limits the swing stroke of the driving wheel mechanism (2) around the first end rotation axis of the suspension plate (231).

5. The freight trolley (100) as claimed in any one of claims 1 to 4, characterised in that the cargo access mechanism (5) comprises two cargo access units (5a), the two cargo access units (5a) being arranged on opposite sides of the trolley body (1) in the fore-and-aft direction (X), and that the cargo access units (5a) comprise a telescopic drive mechanism and a telescopic structure having at least one telescopic arm, the telescopic drive mechanism driving the telescopic arm structure to telescope in the left-and-right direction relative to the trolley body (1).

6. The freight trolley (100) as claimed in claim 5, characterized in that the telescopic structure is provided with a first toothing (511), the telescopic drive comprises an endless belt (525), and the endless belt (525) is provided with a second toothing (525a), the first toothing (511) meshing with the second toothing (525 a).

7. The freight trolley (100) as claimed in claim 6, wherein the freight access unit (5a) further comprises a tensioning mechanism (56), the tensioning mechanism (56) comprises an eccentric shaft (561) and a bearing (562), the eccentric shaft (561) comprises a first shaft part (561a) and a second shaft part (561b) connected with each other, a shaft hole (121) is provided on the trolley body (1), the first shaft part (561a) is matched with the shaft hole (121), the second shaft part (561b) is eccentrically arranged relative to the first shaft part (561a), and the bearing (562) is sleeved on the second shaft part (561b) and is in contact with the endless belt (525).

8. The freight car (100) of claim 7, where the tensioning mechanism (56) further includes a clamp plate (564), a first fastener (563), and a second fastener (565), a connecting hole (564a) is formed in the clamping plate (564), one end of the first shaft part (561a) far away from the second shaft part (561b) is inserted into the connecting hole (564a) and locked by the first fastening piece (563), and the clamping plate (564) is also provided with a fixing hole (564b), the fixing hole (564b) is a long round hole, the vehicle body (1) is provided with a plurality of threaded holes (122) which are distributed along the circumferential direction of the shaft hole (121) and are matched with the fixing holes (564b), the second fastening member (565) passes through the fixing hole (564b) and the screw hole (122) to fix the clamp plate (564) to the vehicle body (1).

9. The cargo cart (100) of claim 8, wherein opposite side surfaces of said first shaft portion (561a) are flat, said connection hole (564a) has a flat hole wall, and said flat hole wall of said connection hole (564a) is fitted with said flat surface of said first shaft portion (561 a).

10. The cargo carrying trolley (100) according to claim 5, wherein said at least one telescopic arm comprises a first arm segment (51) and a second arm segment (53), and said telescopic structure further comprises a linkage mechanism, said first arm segment (51) is slidably connected to said trolley body (1), said second arm segment (53) is slidably connected to said first arm segment (51), said linkage mechanism connects said first arm segment (51) and said second arm segment (53) and drives said second arm segment (53) to telescope along the left-right direction (Y) relative to said first arm segment (51) when said first arm segment (51) telescopes relative to said trolley body (1).

11. The cargo trolley (100) according to claim 10, characterized in that the telescopic distance of the second arm section (53) relative to the first arm section (51) is at least one time the telescopic distance of the first arm section (51) relative to the vehicle body (1) under the action of the linkage mechanism.

12. The cart (100) of claim 11, wherein the linkage mechanism comprises a first belt (541), a first belt pulley (542), a second belt pulley (543), and a second belt (544), the first belt pulley (542) and the second belt pulley (543) are fixed to the first arm section (51) and sequentially arranged along a retraction direction, a first end of the first belt (541) and a first end of the second belt (544) are respectively connected to two ends of the cart body (1) along an extension direction, and a second end of the first belt (541) bypasses the first belt pulley (542) and the second belt pulley (543) and is respectively connected to two ends of the second arm section (53) along an extension direction.

13. The freight trolley (100) as claimed in claim 5, characterised in that the cargo access unit (5a) further comprises a pusher dog (55), the pusher dog (55) being rotatably arranged on a last telescopic arm of the at least one telescopic arm.

14. The cart (100) of claim 1, wherein said cart (100) further comprises guide wheels (32), said guide wheels (32) being disposed on said body (1) and guiding said cart (100) by engaging with a rail side wall.

15. A warehousing system comprising shelves, characterized in that it further comprises a trolley (100) according to any of claims 1 to 14, said trolley (100) being intended for accessing the goods (200) on said shelves.

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