阅读说明：本技术 一种穿梭车 (Shuttle car ) 是由 张金虎 董国利 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种穿梭车,属于仓储技术领域。所述穿梭车包括两个车体和在两个车体之间呈相对设置的两个移动货叉,还包括变距导向轴、变距驱动滑动套杆、出叉驱动机构和动力机构；变距驱动滑动套杆可伸缩地转动套设于变距导向轴外,可以实现移动货叉的滑动导向,其两端分别固定有出叉驱动同步轮；动力机构则用于驱动变距驱动滑动套杆转动,进而驱动出叉驱动同步轮转动；出叉驱动机构在出叉驱动同步轮的带动下驱动移动货叉进行伸缩；上述设置简化了整个穿梭车结构,使车辆易于维修和保养。(The invention discloses a shuttle car, and belongs to the technical field of storage. The shuttle car comprises two car bodies, two movable forks which are oppositely arranged between the two car bodies, a variable pitch guide shaft, a variable pitch driving sliding sleeve rod, a fork outlet driving mechanism and a power mechanism; the variable-pitch driving sliding sleeve rod is telescopically and rotatably sleeved outside the variable-pitch guide shaft, so that the sliding guide of the movable fork can be realized, and fork-out driving synchronous wheels are respectively fixed at two ends of the movable fork; the power mechanism is used for driving the variable-pitch driving sliding sleeve rod to rotate so as to drive the fork to drive the synchronous wheel to rotate; the fork-out driving mechanism drives the movable fork to extend and retract under the driving of the fork-out driving synchronizing wheel; the arrangement simplifies the structure of the whole shuttle vehicle, and the vehicle is easy to maintain.)

1. A shuttle comprising two car bodies (10) and two mobile forks (30) arranged oppositely between the two car bodies (10), characterized in that it further comprises:

the variable-pitch guide shaft (60) is fixedly arranged between the two vehicle bodies (10);

the variable-pitch driving sliding sleeve rod (40) is telescopically and rotatably sleeved outside the variable-pitch guide shaft (60), and two ends of the variable-pitch driving sliding sleeve rod are respectively fixed with a fork-out driving synchronous wheel (41);

the power mechanism (70) is used for driving the variable-pitch driving sliding sleeve rod (40) to rotate;

and the fork-out driving mechanism (50) is used for driving the movable fork (30) to stretch and retract under the driving of the fork-out driving synchronizing wheel (41).

2. The shuttle vehicle according to claim 1, wherein the fork-out driving mechanism (50) comprises a fork-out driving synchronous belt (51), a guide wheel (52) and a tension wheel (53), the fork-out driving synchronous belt (51) is wound on the fork-out driving synchronous wheel (41), the guide wheel (52) and the tension wheel (53) and is engaged with the movable fork (30) to drive the movable fork (30) to extend and retract; the length of the fork-out drive timing belt (51) is configured to be removable by being fitted over the vehicle body (10).

3. A shuttle as claimed in claim 1, characterized in that it further comprises a pitch-varying mechanism (20) interposed between said two bodies (10), one of said two mobile forks (30) being fixed in axial position on said pitch-varying guide shaft (60) and the other being connected to said pitch-varying mechanism (20) and to said pitch-varying driving sliding sleeve (40).

4. A shuttle as claimed in claim 3, characterized in that said pitch drive sliding sleeve rod (40) comprises:

the first guide sleeve (42) comprises a first subsection (421) and a second subsection (422) which are sequentially arranged, the first subsection (421) and the second subsection (422) are rotatably sleeved at the first end of the variable-pitch guide shaft (60), and the axial position of the first guide sleeve (42) on the variable-pitch guide shaft (60) is fixed;

the second guide sleeve (43) comprises a third part (431) and a fourth part (432) which are sequentially arranged, the third part (431) is sleeved at the second end of the variable-pitch guide shaft (60) and is rotatably connected to the movable fork (30) connected with the variable-pitch mechanism (20); said fourth portion (432) engaging said second portion (422) of said first guide sleeve (42) to enable said second guide sleeve (43) to slide relative to said first guide sleeve (42) and said pitch guide shaft (60) while enabling said first guide sleeve (42) and said second guide sleeve (43) to rotate synchronously relative to said pitch guide shaft (60);

the first guide sleeve (42) and the second guide sleeve (43) are respectively provided with one fork-out driving synchronous wheel (41).

5. A shuttle as claimed in claim 4, characterized in that said first guide sleeve (42) is rotatably sleeved outside said pitch guide shaft (60) by means of a first bearing (44); the fourth section (432) of the second guide sleeve (43) is sleeved outside the second section (422) of the first guide sleeve (42); a second bearing (312) is arranged between the outer ring of the third part (431) of the second guide sleeve (43) and the movable fork (30), and a bushing (46) is arranged between the inner ring of the third part (431) and the variable-pitch guide shaft (60).

6. A shuttle as claimed in claim 5, characterized in that the outer cross section of the second subsection (422) of the first guide sleeve (42) and the inner cross section of the fourth subsection (432) of the second guide sleeve (43) are both of the same polygonal shape, so that the inner circle of the fourth subsection (432) coincides with the outer circle of the second subsection (422).

7. A shuttle vehicle as claimed in claim 1, characterized in that said power mechanism (70) comprises a driving motor (71) and a synchronous pulley structure (72), said synchronous pulley structure (72) comprises a driving pulley (721), a driven pulley (722) and a synchronous belt (723) wound around said driving pulley (721) and said driven pulley (722), said driving pulley (721) is coaxially disposed on the output shaft of said driving motor (71), and said driven pulley (722) is coaxially disposed on said variable-pitch driving sliding sleeve rod (40).

8. A shuttle as claimed in claim 2, characterized in that said mobile forks (30) comprise fork supports (31) and fork bodies (32) which are retractable with respect to said fork supports (31), said exit drive timing belt (51) being in meshing connection with said fork bodies (32).

9. A shuttle as claimed in claim 8, characterized in that said mobile forks (30) further comprise pallets (33), said pallets (33) being horizontally fixed to said fork support frames (31) for carrying goods; the power mechanism (70) is arranged on the fork supporting frame (31) and is positioned below the supporting plate (33).

10. A shuttle as claimed in claim 3, characterized in that said pitch-varying mechanism (20) comprises two pitch-varying driving synchronizing wheels (21) respectively provided in said two bodies (10) and a pitch-varying driving timing belt (22) wound simultaneously around said two pitch-varying driving synchronizing wheels (21), said pitch-varying driving timing belt (22) being adapted to fixedly connect said mobile forks (30).

11. The shuttle vehicle according to claim 1, characterized in that the pitch guide shafts (60) are arranged in two at intervals, and at least one of the two pitch guide shafts (60) is sleeved with the pitch driving sliding sleeve rod (40).

Technical Field

The invention relates to the technical field of warehousing, in particular to a shuttle vehicle.

Background

The shuttle car is an intelligent robot, and can realize tasks such as goods taking, transporting, placing and the like through programming; the shuttle type storage system is characterized in that a high-precision guide rail is additionally arranged on a traditional goods shelf, so that the shuttle vehicle can run stably on the traditional goods shelf, the shuttle vehicle transports goods to a specified position on the goods shelf or connects the goods at the specified position on the goods shelf through a movable fork, and a fork truck is not needed, so that the utilization rate of storage space is greatly improved. In the prior art, the shuttle vehicles often adopt variable-pitch shuttle vehicles to adapt to the taking and placing of goods with different sizes.

However, in the process of long-term use, the inventor finds that the following problems exist in the prior art:

1) the variable-pitch shuttle car comprises a variable-pitch mechanism, a variable-pitch guide mechanism, a fork-out driving mechanism and the like, and a plurality of mechanisms are arranged independently, so that the whole variable-pitch shuttle car is complex in structure, difficult to disassemble during maintenance or repair and poor in maintainability;

2) when the fork driving mechanism is replaced or maintained by the variable-pitch shuttle car, other mechanisms such as the variable-pitch mechanism and the like need to be disassembled at the same time, so that most of the car body is disassembled, time and labor are wasted, and the maintenance efficiency is greatly reduced.

Therefore, it is desirable to provide a shuttle car to solve the above problems.

Disclosure of Invention

The embodiment of the invention aims to provide a shuttle vehicle, which can effectively solve the problems that in the prior art, the structure of the shuttle vehicle is complex, the maintainability of the whole shuttle vehicle is poor, and the maintenance efficiency is reduced.

In order to achieve the purpose, the invention adopts the following technical scheme:

a shuttle comprising two car bodies and two mobile forks disposed in opposition between the two car bodies, the shuttle further comprising:

the variable-pitch guide shaft is fixedly arranged between the two vehicle bodies;

the variable-pitch driving sliding sleeve rod is telescopically and rotatably sleeved outside the variable-pitch guide shaft, and two ends of the variable-pitch driving sliding sleeve rod are respectively fixed with a fork-out driving synchronous wheel;

the power mechanism is used for driving the variable-pitch driving sliding sleeve rod to rotate;

and the fork discharging driving mechanism is used for driving the movable fork to stretch under the driving of the fork discharging driving synchronizing wheel.

As an alternative to the shuttle car, the fork-out driving mechanism includes a fork-out driving synchronous belt, a guide wheel and a tension wheel, and the fork-out driving synchronous belt is wound around the fork-out driving synchronous wheel, the guide wheel and the tension wheel and is engaged with the movable fork to drive the movable fork to extend and retract; the length of the fork-out driving synchronous belt is configured to be capable of being sleeved on the vehicle body to be taken down.

As an alternative of the above shuttle vehicle, the shuttle vehicle further includes a distance varying mechanism disposed between the two vehicle bodies, one of the two movable forks is fixed at an axial position of the distance varying guide shaft, and the other is connected to the distance varying mechanism and the distance varying driving sliding sleeve rod.

As an alternative to the shuttle car described above, the pitch drive sliding sleeve rod comprises:

the first guide sleeve comprises a first subsection and a second subsection which are sequentially arranged, the first subsection and the second subsection are rotatably sleeved at the first end of the variable-pitch guide shaft, and the axial position of the first guide sleeve on the variable-pitch guide shaft is fixed;

the second guide sleeve comprises a third subsection and a fourth subsection which are sequentially arranged, the third subsection is sleeved at the second end of the variable-pitch guide shaft and is rotatably connected to the movable goods fork connected with the variable-pitch mechanism; the fourth section engages the second section of the first guide sleeve such that the second guide sleeve is slidable relative to the first guide sleeve and the pitch guide shaft while the first guide sleeve and the second guide sleeve are synchronously rotatable relative to the pitch guide shaft;

the first guide sleeve and the second guide sleeve are respectively provided with one fork-out driving synchronizing wheel.

As an alternative of the shuttle car, the first guide sleeve is rotatably sleeved outside the variable-pitch guide shaft through a first bearing; the fourth subsection of the second guide sleeve is sleeved outside the second subsection of the first guide sleeve; and a second bearing is arranged between the outer ring of the third part of the second guide sleeve and the movable fork, and a bushing is arranged between the inner ring of the third part and the variable-pitch guide shaft.

As an alternative to the shuttle car, the cross section of the outer ring of the second subsection of the first guide sleeve and the cross section of the inner ring of the fourth subsection of the second guide sleeve are both in the same polygon, so that the inner ring of the fourth subsection is attached to the outer ring of the second subsection.

As an alternative of the shuttle vehicle, the power mechanism comprises a driving motor and a synchronous pulley structure, the synchronous pulley structure comprises a driving wheel, a driven wheel and a synchronous belt wound on the driving wheel and the driven wheel, the driving wheel is coaxially arranged on an output shaft of the driving motor, and the driven wheel is coaxially arranged on the variable-pitch driving sliding loop bar.

As an alternative of the shuttle car, the movable fork comprises a fork support frame and a fork body which can stretch and retract relative to the fork support frame, and the fork-out driving synchronous belt is meshed and connected with the fork body.

As an alternative of the shuttle car, the movable pallet fork further comprises a pallet, and the pallet is horizontally fixed on the pallet fork supporting frame and used for bearing goods; the power mechanism is arranged on the fork supporting frame and is positioned below the supporting plate.

As an alternative of the shuttle car, the variable pitch mechanism includes two variable pitch driving synchronizing wheels respectively disposed on the two car bodies and a variable pitch driving synchronous belt simultaneously wound on the two variable pitch driving synchronizing wheels, and the variable pitch driving synchronous belt is used for fixedly connecting the movable fork.

As an alternative of the shuttle car, two distance-variable guide shafts are arranged at intervals, and at least one of the two distance-variable guide shafts is sleeved with the distance-variable driving sliding sleeve rod.

The embodiment of the invention has the following beneficial effects:

by arranging the variable-pitch driving sliding sleeve rod and arranging the fork-out driving synchronizing wheel on the variable-pitch driving sliding sleeve rod, the power mechanism drives the variable-pitch driving sliding sleeve rod to rotate and simultaneously drives the fork-out driving synchronizing wheel to rotate synchronously, so that the corresponding fork-out driving mechanism can run under the driving of the fork-out driving synchronizing wheel to drive the movable fork to stretch and retract, and the goods transfer is completed; the variable-pitch driving sliding sleeve rod is telescopically and rotatably sleeved outside the variable-pitch guide shaft, so that the fork-out driving is realized on the premise of not influencing variable-pitch guide; the variable-pitch guide mechanism and the fork-out driving mechanism can be structurally combined through the fork-out driving synchronizing wheel, so that the whole shuttle vehicle structure is optimized and simplified, the disassembly difficulty is reduced, the disassembly range is narrowed, and the vehicle is easy to maintain.

Drawings

FIG. 1 is a first schematic structural view of a shuttle vehicle according to an embodiment of the present invention;

FIG. 2 is a second schematic structural view of a shuttle vehicle according to an embodiment of the present invention;

FIG. 3 is a schematic view of the assembly of the fork drive mechanism and the moving fork of an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a pallet according to an embodiment of the present invention;

FIG. 5 is a schematic view of the assembly of the pitch change mechanism to the vehicle body in an embodiment of the present invention;

FIG. 6 is an assembly view of the pitch guide shaft, the pitch drive sliding sleeve rod and the power mechanism according to the embodiment of the present invention;

FIG. 7 is a schematic view of the assembly of the pitch guide shaft and the pitch drive slip collar of an embodiment of the present invention;

fig. 8 is a cross-sectional view of fig. 7.

In the figure:

10. a vehicle body; 11. a fixed seat;

20. a pitch change mechanism; 21. a variable-pitch driving synchronous wheel; 22. a variable-pitch driving synchronous belt; 23. a variable pitch drive;

30. moving the pallet fork; 31. a fork support; 311. a bearing seat; 312. a second bearing; 32. a fork body; 321. a deflector rod; 33. a support plate; 34. a support plate; 35. a mounting frame;

40. the variable-pitch driving sliding sleeve rod; 41. the fork-out drives the synchronizing wheel; 42. a first guide sleeve; 421. a first section; 422. a second subsection; 43. a second guide sleeve; 431. a third subsection; 432. a fourth subsection; 44. a first bearing; 45. a first retainer ring; 46. a bushing; 47. expanding and tightening the sleeve;

50. a fork-out driving mechanism; 51. the fork-out drives the synchronous belt; 52. a guide wheel; 53. a tension wheel;

60. a variable-pitch guide shaft;

70. a power mechanism; 71. a drive motor; 72. a synchronous pulley structure; 721. a driving wheel; 722. a driven wheel; 723. and (4) a synchronous belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The embodiment discloses a shuttle vehicle, which is mainly used in a shuttle vehicle type storage system, wherein the shuttle vehicle shuttles back and forth between goods shelves to realize the transfer of goods between the goods shelves and the shuttle vehicle. Specifically, referring to fig. 1 and 2, the shuttle includes two vehicle bodies 10 disposed opposite to each other in a first direction (i.e., X direction in the drawing), and two moving forks 30 disposed opposite to each other between the two vehicle bodies 10. Specifically, the moving fork 30 includes a fork support frame 31 and a fork body 32 that is capable of telescoping relative to the fork support frame 31 in a second direction (i.e., Y direction in the drawings); the shift lever 321 is arranged on the fork body 32, and the shift lever 321 on the fork body 32 is kept vertical when the goods are not transferred; when the goods are transferred, the shift lever 321 is kept horizontal, and thus the goods are jointed; the fork body 32 slides on the fork carriage 31 in a second direction, i.e., extends or retracts relative to the fork carriage 31, so that the shift lever 321 can shift the goods for transfer. The movable fork 30 further comprises a support plate 33, and the support plate 33 is horizontally fixed on the fork support frame 31 and used for bearing goods. The pallets 33 of the moving forks 30 are located on the side where the two fork support frames 31 are oppositely disposed, so that the cargo is accommodated between the two vehicle bodies 10 while being supported on the pallets 33 of different moving forks 30. Optionally, referring to fig. 3 and 4, a wedge-shaped support plate 34 is provided between the pallet 33 and the fork support frame 31 to improve the support strength of the pallet 33. In this embodiment, the first direction and the second direction are two directions perpendicular to each other in a horizontal plane.

The shuttle of this embodiment is a displacement shuttle, can be suitable for the transfer of the goods of different sizes, has stronger commonality. With continued reference to fig. 1 and 2, the shuttle vehicle further includes a distance varying mechanism 20 disposed between the two vehicle bodies 10, one of the two movable forks 30 is fixed relative to any one of the vehicle bodies 10, and the other movable fork is connected to the distance varying mechanism 20, the distance varying mechanism 20 can drive the movable fork 30 connected thereto to move in a first direction to approach or depart from the other movable fork 30, so as to change the distance between the two movable forks 30 in the first direction, thereby implementing the distance varying function and being suitable for carrying cargoes of different sizes. Referring to fig. 5, the pitch varying mechanism 20 includes a pitch varying driving member 23, two pitch varying driving synchronizing wheels 21 respectively disposed in the two vehicle bodies 10, and a pitch varying driving synchronous belt 22 simultaneously wound around the two pitch varying driving synchronizing wheels 21, the pitch varying driving synchronous belt 22 being used for fixedly connecting the movable fork 30; the variable-pitch driving piece 23 is used for driving any one variable-pitch driving synchronous wheel 21 to rotate, driving the variable-pitch driving synchronous belt 22 to run, and finally realizing variable-pitch driving of the movable fork 30. Specifically, the variable pitch drive timing belt 22 is fixedly connected to the fork support 31 of the mobile fork 30.

Referring to fig. 1, the shuttle car further includes a variable pitch guide shaft 60, and the variable pitch guide shaft 60 is fixed between the two car bodies 10 for implementing guidance during variable pitch. Specifically, one of the two movable forks 30 is fixed in axial position on the pitch guide shaft 60, and the other is slidably disposed on the pitch guide shaft 60 to achieve guidance. In practical implementation, the fork support frame 31 of the movable fork 30 which is not connected to the pitch varying mechanism 20 can be directly and fixedly connected to the vehicle body 10 on the corresponding side, and since the pitch varying guide shaft 60 is also fixed on the vehicle body 10, the fixing of the axial position of the movable fork 30 on the pitch varying guide shaft 60 is realized.

Referring to fig. 1, 2, 3 and 6, the shuttle car further comprises a variable pitch drive sliding loop bar 40, a fork-out drive mechanism 50 and a power mechanism 70; the variable-pitch driving sliding sleeve rod 40 is telescopically and rotatably sleeved outside the variable-pitch guide shaft 60, and two ends of the variable-pitch driving sliding sleeve rod are respectively fixed with a fork-out driving synchronous wheel 41; the power mechanism 70 is used for driving the variable-pitch driving sliding sleeve rod 40 to rotate, and further driving the fork-out driving synchronizing wheel 41 thereon to rotate; the fork-out driving mechanism 50 is used for driving the movable fork 30 to extend and retract under the driving of the fork-out driving synchronizing wheel 41. In specific implementation, the variable-pitch driving sliding sleeve rod 40 is arranged, and the fork-out driving synchronizing wheel 41 is arranged on the variable-pitch driving sliding sleeve rod 40, so that the power mechanism 70 drives the variable-pitch driving sliding sleeve rod 40 to rotate and simultaneously drives the fork-out driving synchronizing wheel 41 to synchronously rotate, and further the corresponding fork-out driving mechanism 50 can run under the driving of the fork-out driving synchronizing wheel 41 to drive the movable fork 30 to stretch and retract, so that the cargo transfer is completed; further, since the variable-pitch driving sliding sleeve rod 40 is telescopically and rotatably sleeved outside the variable-pitch guide shaft 60, the fork-out driving synchronizing wheel 41 on the variable-pitch driving sliding sleeve rod 40 can also slide on the variable-pitch guide shaft 60 together, and the fork-out driving synchronizing wheel 41 and the moving fork 30 are always in driving fit through the fork-out driving mechanism 50; namely, the movable fork 30 can ensure normal fork discharge and simultaneously realize sliding guide on the variable-pitch guide shaft 60 by driving the sliding sleeve rod 40 through variable pitch; that is to say, the whole shuttle completes the fork-out driving on the premise of not influencing the variable pitch guiding. In the arrangement, the variable-pitch guide mechanism and the fork-out driving mechanism 50 are structurally combined through the fork-out driving synchronizing wheel 41, so that the whole shuttle vehicle structure is optimized and simplified, the disassembly difficulty is reduced, the disassembly range is narrowed, and the vehicle is easy to maintain.

Further, in the present embodiment, the fork-out driving mechanism 50 includes a fork-out driving timing belt 51, a guide wheel 52 and a tension wheel 53, the fork-out driving timing belt 51 is wound around the fork-out driving timing belt 41, the guide wheel 52 and the tension wheel 53, and is engaged with the movable fork 30 to drive the movable fork 30 to extend and retract; the length of the fork-out drive timing belt 51 is arranged to be able to be pulled out through the vehicle body 10. Because the length of the fork-out driving synchronous belt 51 is set to be capable of being sleeved out of the vehicle body 10, when the fork-out driving synchronous belt 51 is replaced or maintained, only the fork-out driving synchronous belt 51 needs to be loosened and then sleeved out of the vehicle body 10 to be taken down, the vehicle body 10 and other mechanisms do not need to be disassembled, and the maintenance efficiency or the replacement efficiency is improved.

Alternatively, the timing belt 51 is engaged with the fork body 32 in a meshing engagement. Specifically, optionally, the front surface and the back surface of the fork-out driving synchronous belt 51 are respectively provided with a first tooth and a second tooth, the bottom surface of the fork body 32 is provided with a third tooth, the first tooth of the fork-out driving synchronous belt 51 is meshed with the third tooth of the fork body 32, and the second tooth of the fork-out driving synchronous belt 51 is meshed with the fork-out driving synchronous wheel 41; the arrangement can realize the driving of the fork driving synchronous belt 51 to the extension and retraction of the fork body 32, and also facilitates the matching between the fork driving synchronous belt 51 and the fork driving synchronous wheel 41. Further alternatively, the guide wheel 52 and the tension wheel 53 of the fork-out driving mechanism 50 are both arranged on the movable fork 30; specifically, the guide wheels 52 and the tension wheels 53 are provided on the fork support frame 31 of the mobile fork 30, instead of the vehicle body 10, to facilitate mounting and dismounting; moreover, for the movable fork 30 connected with the variable pitch mechanism 20, the arrangement ensures that the whole fork-out driving mechanism 50 can move horizontally along with the movable fork 30 and the fork-out driving synchronous wheel 41, thereby ensuring the normal implementation of the fork-out function.

Referring to fig. 1, 2 and 6-8, the variable-pitch driving sliding sleeve rod 40 comprises a first guide sleeve 42 and a second guide sleeve 43, and the fork-out driving synchronizing wheel 41 is coaxially arranged on each of the first guide sleeve 42 and the second guide sleeve 43 and is used for respectively driving the fork bodies 32 on the two movable forks 30 to fork out, so that the first guide sleeve 42 and the second guide sleeve 43 are required to synchronously rotate relative to the variable-pitch guide shaft 60. Specifically, the first guide sleeve 42 includes a first sub-portion 421 and a second sub-portion 422 sequentially arranged along a first direction, the first sub-portion 421 and the second sub-portion 422 are both rotatably sleeved on the first end of the variable pitch guide shaft 60, and the axial position of the first guide sleeve 42 on the variable pitch guide shaft 60 is fixed. In the present embodiment, the first end of the variable pitch guide shaft 60 is connected to the vehicle body 10 fixed relative to the movable fork 30, that is, the first end of the variable pitch guide shaft 60 is the end connected to the vehicle body 10 to which the movable fork 30 is fixed, and the other end of the variable pitch guide shaft 60 is the second end. The second guide sleeve 43 includes a third subsection 431 and a fourth subsection 432 sequentially arranged along the first direction, the third subsection 431 is sleeved on the second end of the variable pitch guide shaft 60 and is rotatably connected to the movable fork 30 connected with the variable pitch mechanism 20, and the fourth subsection 432 is engaged with the second subsection 422 of the first guide sleeve 42, so that the second guide sleeve 43 can slide along the first direction relative to the first guide sleeve 42 and the variable pitch guide shaft 60 while the first guide sleeve 42 and the second guide sleeve 43 can synchronously rotate relative to the variable pitch guide shaft 60. That is, the third branch 431 of the second guide sleeve 43 is connected to the movable fork 30 connected to the pitch change mechanism 20, and can slide in the first direction by cooperating with the first guide sleeve 42 and the pitch change guide shaft 60, thereby realizing the pitch change guide of the movable fork 30; meanwhile, the second guide sleeve 43 and the first guide sleeve 42 can synchronously rotate, so that the corresponding fork-out driving synchronous wheel 41 can be driven to rotate, and synchronous fork-out driving of the two movable forks 30 is realized; the fork-out driving process does not interfere with the pitch changing action. Optionally, the first guide sleeve 42 and the second guide sleeve 43 are connected with the corresponding fork-out driving synchronizing wheel 41 through an expansion sleeve 47.

More specifically, referring to fig. 8, the first guiding sleeve 42 is rotatably sleeved outside the variable pitch guiding axle 60 through the first bearing 44 to ensure that the first guiding sleeve 42 is rotatably sleeved relative to the variable pitch guiding axle 60; the fourth portion 432 of the second guiding sleeve 43 is sleeved outside the second portion 422 of the first guiding sleeve 42 to ensure the sliding fit between the second guiding sleeve 43 and the first guiding sleeve 42. Alternatively, two first bearings 44 are provided, and are respectively located at both ends of the first guide sleeve 42 in the first direction. Further optionally, the first bearing 44 is a mating angular contact ball bearing. In this embodiment, the first end and the second end of the variable-pitch guide shaft 60 are both mounted on the corresponding vehicle body 10 through the fixing seat 11, wherein the fixing seat 11 at the first end of the variable-pitch guide shaft 60 can simultaneously abut against the first bearing 44 therein, and the first bearing 44 at the other end of the first guide sleeve 42 is limited by the first retaining ring 45 mounted on the variable-pitch guide shaft 60, so as to ensure that the axial position of the first guide sleeve 42 on the variable-pitch guide shaft 60 is fixed.

Further, referring to fig. 2 and 8, the third section 431 of the second guide sleeve 43 is attached to the fork support 31 of the moving fork 30. Specifically, a bearing seat 311 is arranged on the fork support frame 31, a second bearing 312 is mounted on the bearing seat 311, a third branch 431 of the second guide sleeve 43 is arranged in an inner ring of the second bearing 312 in a penetrating mode, and therefore the second guide sleeve 43 can move along with the fork support frame 31 to conduct variable-pitch guiding, and meanwhile the fork is not delayed to be driven to drive the fork to drive the synchronizing wheel 41 to rotate. Further alternatively, a bushing 46 is provided between the inner ring of the third section 431 and the pitch guide shaft 60 to ensure smooth rotation of the second guide sleeve 43 on the pitch guide shaft 60.

Referring to fig. 6 and 8, the cross section of the outer ring of the second subsection 422 of the first guide sleeve 42 and the cross section of the inner ring of the fourth subsection 432 of the second guide sleeve 43 are both the same polygon, and further, when the second guide sleeve 43 is sleeved on the first guide sleeve 42, the inner ring of the fourth subsection 432 is attached to the outer ring of the second subsection 422, and since the second guide sleeve is a polygon, when any one of the first guide sleeve 42 and the second guide sleeve 43 rotates, the other can be driven to rotate synchronously, so that the synchronous fork discharge of the two movable forks 30 is ensured. Furthermore, the first subsection 421 of the first guide sleeve 42 and the third subsection 431 of the second guide sleeve 43 are respectively provided with one fork-out driving synchronizing wheel 41, so that the sliding fit between the second guide sleeve 43 and the first guide sleeve 42 is prevented from being influenced when the fork-out driving synchronizing wheels 41 are arranged on the second subsection 422 and the fourth subsection 432. Optionally, the outer ring cross-section of the first subsection 421 of the first guide sleeve 42 and the outer ring cross-section of the second guide sleeve 43 are both circular to facilitate mounting with the corresponding fork-out drive synchronizing wheel 41. Further, pitch guide shaft 60 is a generally cylindrical shaft, and thus, the inner cross-section of third portion 431 of second guide sleeve 43 is circular in cross-section with the inner cross-section of first guide sleeve 42 to facilitate rotational engagement with pitch guide shaft 60 via bushing 46 or first bearing 44.

Referring to fig. 2 and 6, the power mechanism 70 includes a driving motor 71 and a synchronous pulley structure 72, the synchronous pulley structure 72 includes a driving pulley 721, a driven pulley 722 and a synchronous belt 723 wound around the driving pulley 721 and the driven pulley 722, the driving pulley 721 is coaxially disposed on an output shaft of the driving motor 71, the driven pulley 722 is coaxially disposed on the variable-pitch driving sliding sleeve 40, and thereby the variable-pitch driving sliding sleeve 40 is driven to rotate. Further, referring to fig. 1, the power mechanism 70 is disposed on the fork support frame 31 and below the support plate 33 so as not to interfere with the placement of the goods. Further, in the present embodiment, the power mechanism 70 is disposed on the fork supporting frame 31 of the movable fork 30 fixedly connected to the vehicle body 10, and the power mechanism 70 directly drives the fork-out driving synchronizing wheel 41 on the first guiding sleeve 42. Of course, in other embodiments, the power mechanism 70 may be disposed on the other fork support frame 31 for moving the fork 30, and the power mechanism 70 directly drives the fork-out driving synchronizing wheel 41 on the second guide sleeve 43. Alternatively, referring to fig. 3 and 4, a mounting bracket 35 is provided on the fork support frame 31 and the support plate 33 for mounting and fixing the driving motor 71.

In an embodiment, two pitch-variable guide shafts 60 are arranged at intervals along the second direction, the two pitch-variable drive sliding loop bars 40 can be sleeved on both the two pitch-variable guide shafts 60, at this time, the power mechanism 70 can selectively drive any one of the pitch-variable drive sliding loop bars 40 to rotate, and under the driving of the fork-out drive synchronous belt 51, the other pitch-variable drive sliding loop bar 40 can also synchronously rotate, so as to realize the extension and retraction of the movable fork 30. Referring to fig. 2, in another embodiment, two pitch guide shafts 60 are spaced apart from each other along the second direction, one pitch guide shaft 60 is sleeved with a pitch driving sliding sleeve 40, and the other pitch guide shaft 60 is not sleeved with the pitch driving sliding sleeve 40, but two fork-out driving synchronizing wheels 41 are rotatably disposed thereon, so that the corresponding fork-out driving synchronizing belt 51 normally operates. Specifically, for the variable-pitch guide shaft 60 without the variable-pitch driving sliding sleeve rod 40, a linear bearing is arranged on the fork support frame 31 of the movable fork 30 connected with the variable-pitch mechanism 20, the variable-pitch guide shaft 60 is arranged on an inner ring through which the linear bearing penetrates, so that the movable fork 30 is arranged on the variable-pitch guide shaft 60 in a sliding manner through the linear bearing to realize variable-pitch guide, and the fork-out driving synchronizing wheel 41 on the side is rotatably arranged on an outer ring of the linear bearing, so that the fork-out driving synchronizing belt 51 can normally run; on the other hand, the other fork-out driving synchronizing wheel 41 of the variable-pitch guide shaft 60 is fixed in position on the variable-pitch guide shaft 60 with respect to the movable fork 30 driven correspondingly, so that the movable fork is only required to be rotatably arranged on the variable-pitch guide shaft 60 through a bearing structure, and is not required to be in sliding fit with respect to the variable-pitch guide shaft 60.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.