Lifting device of loading and unloading vehicle

Abstract

The utility model discloses a loading and unloading vehicle lifting device which comprises a base, a linear driving assembly and a lifting mechanism, and the base is vertically arranged. The linear driving assembly is arranged on the base and used for driving the rear wheels to move up and down along the base. The lifting mechanism comprises connecting rod assemblies and a first power piece which are of a parallelogram structure, the four connecting rod assemblies comprise connecting rods which are sequentially connected in a pivoted mode, one connecting rod is fixed to the base, the first power piece is used for driving the connecting rod assemblies to be in linkage so that one vertically-arranged connecting rod can move up and down, and front wheels are arranged on the vertically-moving connecting rod. The front wheels and the rear wheels can ascend and descend respectively, the loading and unloading requirements are met, meanwhile, ascending and descending of the front wheels and ascending and descending of the rear wheels cannot interfere with each other, and the loading and unloading vehicle is still kept stable in the wheel ascending and descending process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a loading and unloading vehicle technology field especially relates to a loading and unloading vehicle lifting device. BACKGROUND

[0002] The loading and unloading vehicle is usually used for loading and unloading goods between conveyors and carriages, and comprises a standing platform on which an operator stands to operate. Different carriages can be located at different heights, but the existing loading and unloading vehicle cannot change its own height position and thus cannot be connected to carriages at different heights to enter the carriages, which cannot meet the loading and unloading requirements. SUMMARY

[0003] To overcome the above-mentioned shortcomings, the utility model provides a loading and unloading vehicle lifting device, the front wheel and the rear wheel can be lifted respectively, and the lifting of the front wheel and the rear wheel does not interfere with each other, so that the loading and unloading vehicle remains stable during the lifting of the wheels.

[0004] To achieve the above-mentioned purposes, the utility model adopts the following technical scheme: a loading and unloading vehicle lifting device comprises:

[0005] a base vertically arranged;

[0006] a linear drive assembly arranged on the base and used to drive the rear wheel to move up and down along the base;

[0007] a lifting mechanism comprising a parallelogram linkage and a first power member, the parallelogram linkage comprising four sequentially pivoted connecting rods, one of which is fixed to the base, and the first power member being used to drive the linkage to move the vertical connecting rod up and down, and the connecting rod moving up and down is provided with the front wheel.

[0008] The utility model has the advantages of:

[0009] The linear drive assembly and the lifting mechanism are used to drive the rear wheel and the front wheel to lift respectively, and the front wheel and the rear wheel are lifted to the height position corresponding to the carriage in turn and then connected to the carriage. At this time, the loading and unloading vehicle can be connected to the carriage at different heights and enter the carriage, meeting the loading and unloading requirements.

[0010] The parallelogram linkage is used to drive the front wheel to lift, and the front wheel during the lifting process does not affect the contact between the rear wheel and the ground, thereby avoiding the loading and unloading vehicle from rolling over and improving the adaptability of the loading and unloading vehicle.

[0011] Further, the four connecting rods are connecting rod one, connecting rod two, connecting rod three and connecting rod four, the connecting rod one is fixed and vertically arranged with the base, the connecting rod three is parallel to the connecting rod one and the front wheel is rotationally connected with the lower end of the connecting rod three, the connecting rod two and the connecting rod four are located between the connecting rod one and the connecting rod three, and the connecting rod two is located above the connecting rod four.

[0012] Further, the housing of the first power member is hinged with the connecting rod one, and the piston rod of the first power member is hinged with the connecting rod two. When the piston rod of the first power member is extended or retracted, the connecting rod assembly can be deformed.

[0013] Further, the linear driving assembly comprises a second power member fixed on the base, the second power member drives a lifting frame to ascend and descend along the base, and the rear wheel is rotationally connected with the lifting frame.

[0014] Further, the base is provided with a guide groove, and the lifting frame comprises a guide portion inserted into the guide groove and capable of sliding along the guide groove. The guide groove is provided with a linear guide rail, and the lifting frame is fixed with a sliding block capable of sliding along the linear guide rail.

[0015] Further, the lifting mechanism is provided with two groups, and the two groups of lifting mechanisms are arranged in a direction perpendicular to the moving direction of the car loader / unloader. At this time, the front wheel has at least two, and the movement of the car loader / unloader is more stable. Through the cooperation of the guide groove and the guide portion, the lifting frame and the rear wheel are stably lifted.

[0016] Further, the car loader / unloader lifting device further comprises a detection mechanism, the detection mechanism comprises a front detection portion for detecting the position of the front wheel and a rear detection portion for detecting the position of the rear wheel. The front wheel and the rear wheel are lifted respectively, and therefore the detection portions for detecting the positions thereof are also arranged respectively. The front detection portion can detect whether the front wheel enters the car body, and the rear detection portion can detect whether the rear wheel enters the car body.

[0017] Further, the front detection portion comprises a first distance sensor and a second distance sensor located on the front and rear sides of the front wheel in the moving direction of the car loader / unloader. The rear detection portion comprises a third distance sensor and a fourth distance sensor located on the front and rear sides of the rear wheel in the moving direction of the car loader / unloader. Because the front wheel and the rear wheel enter the car body from front to back, but must be completely entered into the car body before descending to abut against the car body, therefore distance sensors are arranged on the front and rear sides of the front wheel and the rear wheel, and whether the front wheel or the rear wheel is completely entered into the car body is detected by the two distance sensors.

[0018] Further, the first distance sensor, the second distance sensor, the third distance sensor and the fourth distance sensor all emit detection light vertically downward.

[0019] Further, the connecting rod moving up and down is fixed with a support frame, the support frame is provided with a standing platform capable of lifting along the support frame, and the support frame is fixed with a vertical driving assembly for driving the standing platform to lift. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a three-dimensional structure schematic view of the embodiment of the utility model;

[0021] Figure 2 It is a side view of the embodiment of the utility model;

[0022] Figure 3 It is a side view when the front wheel moves up in the embodiment of the utility model;

[0023] Figure 4 It is another angle three-dimensional structure schematic view and its local enlarged view of the embodiment of the utility model.

[0024] In the drawing:

[0025] 1, base;

[0026] 2, linear drive assembly; 21, second power piece; 22, lifting frame;

[0027] 3, rear wheel;

[0028] 4, lifting mechanism; 41, connecting rod assembly; 411, connecting rod one; 412, connecting rod two; 413, connecting rod three; 414, connecting rod four; 42, first power piece; 43, fixed rod;

[0029] 5, front wheel;

[0030] 61, front detection part; 611, first distance sensor; 612, second distance sensor; 62, rear detection part; 621, third distance sensor; 622, fourth distance sensor;

[0031] 7, support frame; 71, standing platform; 72, vertical driving assembly. DETAILED DESCRIPTION

[0032] The preferred embodiments of the utility model are described in detail below in combination with the drawings, so that the advantages and features of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0033] EMBODIMENT

[0034] The lifting device for loading and unloading vehicle can respectively lift the front wheel 5 and the rear wheel 3 of the loading and unloading vehicle, makes up for the height difference between the loading and unloading vehicle and the carriage, and stably transfers the goods on the loading and unloading vehicle into the carriage, and can be used for carriages with different heights.

[0035] Referring to the drawings Figure 1 and the drawings Figure 2 As shown in the drawings, the lifting device for loading and unloading vehicle comprises a base 1, the base 1, a linear driving assembly 2 and a lifting mechanism 4.

[0036] The base 1 is vertically arranged, and the vertical direction is the Z direction in each drawing. The linear driving assembly 2 is arranged on the base 1, and is used for driving the rear wheel 3 to move up and down along the base 1. The rear wheel 3 is driven to lift by the linear driving assembly 2. The lifting mechanism 4 comprises a connecting rod assembly 41 forming a parallelogram structure and a first power member 42. The connecting rod assembly 41 comprises four connecting rods which are sequentially pivoted. One of the connecting rods is fixed to the base 1. The first power member 42 is used for driving the connecting rod assembly 41 to move up and down. The front wheel 5 is arranged on the connecting rod moving up and down. The front wheel 5 is driven to lift by the lifting mechanism 4.

[0037] In the embodiment, the rear wheel 3 and the front wheel 5 are respectively driven to lift by the linear driving assembly 2 and the lifting mechanism 4. The front wheel 5 and the rear wheel 3 are lifted to the height positions corresponding to the carriage in sequence, and then are sequentially butted against the carriage. At this time, the loading and unloading vehicle can be butted against and enter the carriage with different heights, and the loading and unloading demand is met. The front wheel 5 is lifted by the connecting rod assembly 41 forming a parallelogram structure. The front wheel 5 in the lifting process does not affect the contact between the rear wheel 3 and the ground, so that the loading and unloading vehicle is prevented from overturning, and the adaptability of the loading and unloading vehicle is improved.

[0038] In use, one end of the base 1 is fixed to the conveyor.

[0039] When the loading and unloading vehicle is lower than the carriage, the lifting mechanism 4 drives the front wheel 5 to move up until the height position of the front wheel 5 is higher than that of the floor of the carriage, and then the front wheel 5 enters the carriage and is lowered to abut against the carriage. In this process, the conveyor supports the base 1, and the connecting rod assembly 41 drives the front wheel 5 to lift. The rear wheel 3 always abuts against and rolls on the ground, and the whole loading and unloading vehicle remains stable and will not overturn. When the rear wheel 3 is ready to enter the carriage, the linear driving assembly 2 drives the rear wheel 3 to move up until the height position of the rear wheel 3 is higher than that of the carriage, and then the rear wheel 3 enters the carriage and is lowered to abut against the carriage. In this process, the conveyor supports the base 1, and the front wheel 5 abuts against and rolls on the carriage. The whole loading and unloading vehicle remains stable and will not overturn.

[0040] When the loading and unloading vehicle is higher than the carriage, the loading and unloading vehicle moves along the moving direction (X direction) towards the carriage until the front wheels 5 all enter the carriage, and then the lifting mechanism 4 drives the front wheels 5 to move downward until the front wheels 5 abut against the carriage. During this process, the conveyor support base 1 is used to drive the front wheels 5 to lift and lower through the linkage assembly 41, the rear wheels 3 are always abutted against and rolled on the ground, and the whole loading and unloading vehicle is kept stable and will not be overturned. When the rear wheels 3 are ready to enter the carriage, after the rear wheels 3 all enter the carriage, the linear driving assembly 2 drives the rear wheels 3 to move downward until they abut against the carriage. During this process, the conveyor support base 1 is used to drive the front wheels 5 to abut against and roll on the carriage, and the whole loading and unloading vehicle is still kept stable and will not be overturned.

[0041] Referring to FIG. 1, the loading and unloading vehicle is provided with a conveyor support base 1, a linear driving assembly 2, a lifting mechanism 4 and a linkage assembly 41. Figure 2 As shown in FIG. 2, the four linkages are linkage one 411, linkage two 412, linkage three 413 and linkage four 414. The linkage one 411 is fixed and vertically arranged with the base 1, the linkage three 413 is parallel to the linkage one 411 and the front wheels 5 are rotationally connected to the lower end of the linkage three 413, at this time the linkage three 413 will always keep vertical state. The linkage two 412 and the linkage four 414 are located between the linkage one 411 and the linkage three 413, and the linkage two 412 is located above the linkage four 414. The linkage assembly 41 uses the characteristics of parallelogram, the linkage one 411 is fixed, the linkage two 412 and the linkage four 414 swing up and down with the hinge point with the linkage one 411 as fulcrum, thereby driving the linkage three 413 to move up and down, realizing the front wheels 5 on the linkage three 413 to move along a straight line in Z direction.

[0042] The first power member 42 is a cylinder or an oil cylinder, the shell of the first power member 42 is hinged with the linkage one 411, and the piston rod of the first power member 42 is hinged with the linkage two 412. Referring to FIG. 3, when the piston rod of the first power member 42 is extended, it drives the linkage two 412 to swing upward, thereby making the linkage three 413 and the front wheels 5 move upward. Figure 3 Referring to FIG. 4, when the piston rod of the first power member 42 is retracted, it drives the linkage two 412 to swing downward, thereby driving the linkage three 413 and the front wheels 5 to move downward. Figure 2

[0043] Referring to FIG. 5, the lifting mechanism 4 is provided with two groups, the two groups of lifting mechanisms 4 are arranged in the direction perpendicular to the moving direction of the loading and unloading vehicle along the horizontal plane, that is, the loading and unloading vehicle moves along the X direction in the figure, and the two groups of lifting mechanisms 4 are arranged in the Y direction in the figure. The linkage three 413 of each lifting mechanism 4 is provided with a front wheel 5, at this time there are at least two front wheels 5, and the movement of the loading and unloading vehicle is more stable and will not tilt in the Y direction. Figure 1

[0044] In an embodiment, the linkages four 414 of the two groups of lifting mechanisms 4 are fixed through the fixed rod 43, at this time the synchronization of the moving rods of the two linkage assemblies 41 is improved, thereby making all the front wheels 5 keep synchronous lifting.​​

[0045] Referring to the drawings Figure 1 and the drawings Figure 2 As shown in the drawings, the linear drive assembly 2 includes a second power member 21 fixed on the base 1, the second power member 21 drives a lifting frame 22 to ascend and descend along the base 1, the rear wheels 3 are rotationally connected with the lifting frame 22, and at least two rear wheels 3 are arranged on the lifting frame 22, at this time, the front wheels 5 and the rear wheels 3 are distributed in a rectangle shape, thereby improving the stability of the vehicle loading and unloading movement.

[0046] In order to provide the stability of the lifting frame 22 ascending and descending, the base 1 is provided with a guide groove, and the lifting frame 22 includes a guide portion inserted into the guide groove and capable of sliding along the guide groove. Through the cooperation of the guide groove and the guide portion, the lifting frame 22 and the rear wheels 3 are stably lifted and descended.

[0047] In order to know the positions of the front wheels 5 and the rear wheels 3, the vehicle loading and unloading device further includes a detection mechanism, referring to the drawings Figure 4 As shown in the drawings, the detection mechanism includes a front detection portion 61 for detecting the position of the front wheels 5 and a rear detection portion 62 for detecting the position of the rear wheels 3. Because the front wheels 5 and the rear wheels 3 are respectively lifted in this embodiment, the detection portions for detecting the positions thereof are also respectively arranged. The front detection portion 61 can detect whether the front wheels 5 enter the vehicle compartment, and the rear detection portion 62 can detect whether the rear wheels 3 enter the vehicle compartment. The front detection portion 61 is synchronously lifted with the front wheels 5 and is fixed on the connecting rod three 413; the rear detection portion 62 is fixed on the base 1.

[0048] Because the front wheels 5 and the rear wheels 3 enter the vehicle compartment in sequence, but must contact the bottom plate of the vehicle compartment and completely enter the vehicle compartment before being lowered to contact the bottom plate of the vehicle compartment, the front detection portion 61 includes a first distance sensor 611 and a second distance sensor 612 respectively located on the front and rear sides of the front wheels 5 in the driving direction of the vehicle loading and unloading device, when the detection distances of the first distance sensor and the second distance sensor reach the set requirement at the same time, the front wheels 5 reach a plane (the vehicle compartment or the ground), at this time, the front wheels 5 can be lowered to abut against the plane.

[0049] For example, the first distance sensor 611 and the second distance sensor 612 are located at the same height position, when the distances detected by the two are the same, at this time, it is indicated that the front wheels 5 have reached the plane directly above, and the front wheels 5 can be lowered.

[0050] Similarly, the rear detection portion 62 includes a third distance sensor 621 and a fourth distance sensor 622 respectively located on the front and rear sides of the rear wheels 3 in the driving direction of the vehicle loading and unloading device. When the detection distances of the third distance sensor 621 and the fourth distance sensor 622 reach the set requirement at the same time, the rear wheels 3 reach a plane (the vehicle compartment or the ground), at this time, the rear wheels 3 can be lowered to abut against the plane.

[0051] In one embodiment, the first distance sensor 611, the second distance sensor 612, the third distance sensor 621 and the fourth distance sensor 622 all emit vertically downward detection light, which is reflected back when contacting the ground or the carriage and is received by the distance sensor, thereby knowing the distance from the distance sensor to the ground or the carriage. The detection light is vertically downward, and the minimum distance between the two is detected, so that the detection standards of the distance sensors on both sides of the front wheels 5 or the rear wheels 3 are unified, facilitating installation.

[0052] In one embodiment, the connecting rod three 413 is fixed with a support frame 7, the support frame 7 is slidably connected with a standing platform 71, and the support frame 7 is fixed with a vertical driving assembly 72 for driving the standing platform 71 to ascend and descend along the support frame 7. At this time, the standing platform 71 can ascend and descend synchronously with the front wheels 5, and can ascend and descend relative to the front wheels 5 under the driving of the vertical driving assembly 72.

[0053] The vertical driving assembly 72 includes a motor fixed on the support frame 7, the motor drives a closed loop chain to rotate, the support frame 7 is fixed with a transmission sprocket for supporting the chain transmission, and the standing platform 71 is fixed on the chain. When the chain rotates, the standing platform 71 moves up and down.

[0054] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A lift for a truck loading and unloading apparatus, characterized by: The device comprises: a base vertically arranged; a linear driving assembly arranged on the base, which is used to drive the rear wheels to move up and down along the base; a lifting mechanism comprising a parallelogram linkage and a first power member, the linkage comprises four links which are sequentially pivoted, one of the links is fixed with the base, and the first power member is used to drive the linkage to move up and down so as to drive the front wheels to move up and down.

2. The straddle lift device of claim 1, wherein: The four links are respectively link one, link two, link three and link four, the link one is fixed with the base and arranged vertically, the link three is parallel with the link one, and the front wheels are rotatably connected with the lower end of the link three, the link two and the link four are located between the link one and the link three, and the link two is located above the link four.

3. The straddle lift device of claim 2, wherein: The housing of the first power member is hinged with the link one, and the piston rod of the first power member is hinged with the link two.

4. The straddle loader lift of claim 1, wherein: The linear driving assembly comprises a second power member fixed on the base, which is used to drive a lifting frame to move up and down along the base, and the rear wheels are rotatably connected with the lifting frame.

5. The straddle lift device of claim 4, wherein: A guide groove is formed on the base, and the lifting frame comprises a guide part which is inserted into the guide groove and can slide along the guide groove.

6. The straddle loader lift of claim 1, wherein: The lifting mechanism is provided with two groups, and the two groups of the lifting mechanism are arranged in a direction perpendicular to the moving direction of the wagon.

7. A truck lift according to any one of claims 1-6, characterized in that: The wagon lifting device further comprises a detection mechanism, which comprises a front detection part for detecting the position of the front wheels and a rear detection part for detecting the position of the rear wheels.

8. The straddle lift device of claim 7, wherein: The front detection part comprises a first distance sensor and a second distance sensor which are respectively located on the front and rear sides of the front wheels in the moving direction of the wagon; The rear detection part comprises a third distance sensor and a fourth distance sensor which are respectively located on the front and rear sides of the rear wheels in the moving direction of the wagon.

9. The straddle lift device of claim 8, wherein: The first distance sensor, the second distance sensor, the third distance sensor and the fourth distance sensor all emit detection light vertically downward.

10. The straddle loader lift of claim 1, wherein: The link which moves up and down is fixed with a support frame, the support frame is arranged with a standing platform which can move up and down along the support frame, and the support frame is fixed with a vertical driving assembly which is used to drive the standing platform to move up and down along the support frame.

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