Tray lifting mechanism

Abstract

The utility model belongs to the technical field of workshop tray transfer equipment, and particularly relates to a tray lifting mechanism which comprises a lifting table, a conveying unit and a lifting unit. The lifting table is arranged between the production line and the tray butt joint mechanism; the length direction of the conveying unit is parallel to the moving direction of the tray; the lifting unit is arranged at the bottom of the lifting table; the two conveying units are rotationally connected to the two sides of the lifting table correspondingly, and bearing plates fixedly connected to the lifting table are arranged in the conveying units. The whole process is combined with supporting of the bearing plate to the conveying unit, the trays are stably received and sent out, automatic operation can be achieved, manpower is not needed, and the tray conveying device can be applied to transferring of the trays through a tray carrying vehicle in a modern workshop.

Description

Technical Field

[0001] The utility model relates to the technical field of workshop pallet transfer equipment, in particular to a pallet lifting mechanism. Background Technique

[0002] In modern workshops at present, due to the spatial layout factors of the workshop, the transfer of workpieces between production lines often occurs. Therefore, it is usually necessary to use pallets to carry workpieces. When performing a certain process, it is necessary to load materials and stack the workpieces after processing through the pallet, and use an automated transport vehicle to replace the traditional forklift to shuttle between various workstations in the workshop to transfer the workpieces, so as to reduce the use of manpower. Currently, common ones include AGV transport vehicles, etc.

[0003] As is well known, due to its own certain spatial volume, such transport vehicles need to be combined with a pallet docking mechanism with a certain height to realize the transfer of pallets between the production line and the transport vehicle. Because of this, a height difference is generated between the production line and the pallet docking mechanism. In order to solve the problem of pallet transportation between the pallet docking mechanism and the production line, this application proposes a pallet lifting mechanism. Content of the Utility Model

[0004] To achieve the above object, the utility model provides the following technical solution: A pallet lifting mechanism, comprising:

[0005] A lifting platform, which is arranged between the production line and the pallet docking mechanism;

[0006] A conveying unit, including one of a chain and a belt, and the length direction of the conveying unit is parallel to the moving direction of the pallet;

[0007] A lifting unit, including one of a scissors lift and a ball screw mechanism; the lifting unit is arranged at the bottom of the lifting platform;

[0008] The two conveying units are respectively rotatably connected to both sides of the lifting platform, and a supporting plate fixedly connected to the lifting platform is arranged inside the conveying unit.

[0009] Preferably, the conveying unit further includes a first driving unit, the first driving unit includes a synchronous rod and a first motor for driving the synchronous rod to rotate, and both ends of the synchronous rod are coaxially connected to the two conveying units.

[0010] Preferably, a tray pushing unit is further arranged on the lifting platform, the tray pushing unit includes an electric push rod, a U-shaped seat and a rotating plate, the electric push rod is arranged on the lifting platform and the length direction is aligned with the length direction of the conveying unit, the U-shaped seat is fixedly connected to the ejecting end of the electric push rod and the opening direction faces the ejecting direction of the electric push rod; the rotating plate is rotatably connected between the two side walls of the U-shaped seat, and the upper end of the rotating plate can be pushed into the U-shaped seat when the tray passes by.

[0011] Preferably, a limiting structure is further provided at the lower part of the open end of the U-shaped seat.

[0012] Preferably, the lifting unit is a scissors frame, and the lifting unit further includes a base and a second driving unit. The connecting rods at the top and bottom of one side of the scissors frame are respectively slidably connected to the bottom of the lifting platform and the base. The second driving unit includes a telescopic rod rotatably connected inside the base, and the free end of the telescopic rod is connected to the connecting rod on the same side of the bottom of the scissors frame.

[0013] Preferably, the lifting unit is a ball screw mechanism, and the lifting unit further includes a base, a linkage rod and a third driving unit. The linkage rod is connected to the ball screw mechanism. The third driving unit includes a second motor, and the second motor drives a plurality of linkage rods to rotate synchronously.

[0014] Preferably, an opening is provided on the lifting platform between the two conveying units, and a side tray conveying unit is further provided on the base inside the opening. The length direction of the side tray conveying unit is perpendicular to the length direction of the conveying unit. A limiting plate is provided on one side of the side tray conveying unit and below the conveying unit.

[0015] Preferably, the side tray conveying unit includes one of a chain and a belt. The two side tray conveying units are coaxially connected by a coaxial rod, and a third motor for driving the coaxial rod to rotate is further provided on the base.

[0016] Preferably, a limiting belt is further provided between the side tray conveying unit and the lifting platform.

[0017] Preferably, it further includes a side tray docking unit, which includes one of a chain and a belt. The side tray docking unit is provided on the side of the lifting platform, and the length directions of the two side tray docking units are respectively aligned with the directions of the two side tray conveying units.

[0018] Compared with the prior art, the present utility model provides a tray lifting mechanism, which has the following beneficial effects:

[0019] In this tray lifting mechanism, the whole process combines the support of the supporting plate for the conveying unit, so that the tray can be smoothly received and sent out, and it can operate automatically without manual labor, and can be applied to the transfer of trays by tray handling vehicles in modern workshops. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of this tray lifting mechanism;

[0021] Figure 2 is the three-dimensional structural schematic diagram of the lifting unit in this tray lifting mechanism;

[0022] Figure 3 This is a three-dimensional structure diagram of the push plate unit in the pallet lifting mechanism;

[0023] Figure 4 This is a three-dimensional structure diagram of another embodiment of the lifting unit in the pallet lifting mechanism;

[0024] Figure 5 This is a three-dimensional structure diagram of another embodiment of the lifting unit in the pallet lifting mechanism, mainly showing another perspective of the lifting unit;

[0025] Figure 6 This is a three-dimensional structure diagram of the side tray conveying unit in the pallet lifting mechanism;

[0026] Figure 7 This is a three-dimensional structure diagram of the side tray docking unit in the pallet lifting mechanism.

[0027] In the figure: A, pallet; B, production line; C, pallet docking mechanism;

[0028] 1, lifting platform; 11, opening;

[0029] 2, conveying unit; 20, chain; 21, first driving unit; 211, synchronizing rod; 212, first motor; 22, supporting plate;

[0030] 3, lifting unit; 30, base; 31, scissors frame; 311, second driving unit; 312, connecting rod; 313, telescopic rod; 32, ball screw mechanism; 321, linkage rod; 322, third driving unit; 322a, second motor;

[0031] 4, push plate unit; 41, electric push rod; 42, U-shaped seat; 43, rotating plate; 44, limiting structure;

[0032] 5, side tray conveying unit; 50, chain; 51, limiting plate; 52, coaxial rod; 53, third motor; 54, limiting belt;

[0033] 6, side tray docking unit; 60 chain. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1:

[0036] Please refer to Figure 1-2 and Figure 4-5 , the present utility model provides the following technical solutions: A tray lifting mechanism, including a lifting platform 1, a conveying unit 2 and a lifting unit 3; the lifting platform 1 is arranged between the production line B and the tray docking mechanism C; the conveying unit 2 includes one of a chain 20 and a belt, and the length direction of the conveying unit 2 is parallel to the moving direction of the tray A; the lifting unit 3 includes one of a scissor lift 31 and a ball screw mechanism 32; the lifting unit 3 is arranged at the bottom of the lifting platform 1; two conveying units 2 are respectively rotatably connected to both sides of the lifting platform 1, and a supporting plate 22 fixedly connected to the lifting platform 1 is arranged inside the conveying unit 2.

[0037] As an optional implementation of the present utility model, when the tray A is conveyed from the production line B or the tray docking mechanism to at least one end in contact with the conveying unit 2, the rotation of the conveying unit 2 drives the tray A to move. When the tray A is completely on the conveying unit 2, the lifting unit 3 drives the lifting platform 1 to rise or fall to match the height of the tray docking mechanism C or the feeding station of the production line B. Then, the conveying unit 2 is restarted to bring the tray A from the other end to the tray docking mechanism C or the feeding station of the production line B. The entire process, combined with the support of the supporting plate 22 for the conveying unit 2, enables the tray A to be smoothly received and sent out, and can operate automatically without human labor, and can be applied to the transfer of the tray A by the tray A transporter in a modern workshop.

[0038] As Figure 2 and Figure 4-5 shown, the conveying unit 2 further includes a first driving unit 21. The first driving unit 21 includes a synchronizing rod 211 and a first motor 212 for driving the synchronizing rod 211 to rotate. Both ends of the synchronizing rod 211 are coaxially connected to the two conveying units 2.

[0039] As an optional implementation of the present utility model, the first motor 212 drives the synchronizing rod 211 to rotate, thereby driving the two chains 20 to rotate at the same speed, ensuring that when receiving or sending out the tray A, the tray A will not shift, avoiding the situation of inaccurate workpiece feeding positioning or the tray A moving out of the lifting platform 1.

[0040] Embodiment 2:

[0041] As Figure 2-3 shown, a tray pushing unit 4 is further arranged on the lifting platform 1. The tray pushing unit 4 includes an electric push rod 41, a U-shaped seat 42 and a rotating plate 43. The electric push rod 41 is arranged on the lifting platform 1 and its length direction is aligned with the length direction of the conveying unit 2. The U-shaped seat 42 is fixedly connected to the ejecting end of the electric push rod 41 and its opening direction faces the ejecting direction of the electric push rod 41; the rotating plate 43 is rotatably connected between the two side walls of the U-shaped seat 42, and the upper end of the rotating plate 43 can be pushed into the U-shaped seat 42 when the tray A passes by.

[0042] As an alternative embodiment of the present utility model, when the tray A enters the lifting table 1 from the feeding station of the production line B, the tray A can gently push open the rotating plate 43, causing the rotating plate 43 to rotate and retract below the surface of the lifting table 1, ensuring the smooth movement of the tray A. When one end of the tray A close to the production line B completely passes the rotating plate 43, the rotating plate 43 resets due to gravity (or a spring can also be used). At this time, the telescopic rod 313 is activated to drive the movement of the rotating plate 43 to push the end of the tray A, so as to push the tray A onto the tray docking mechanism C. After the tray A completely disengages from the conveying unit 2, the telescopic rod 313 resets. Therefore, this technical solution can not only receive and send out the tray A, but also assist in pushing the tray A through the tray pushing unit 4, especially suitable for the discharging end of the production line B.

[0043] Furthermore, one end of the top of the rotating plate 43 close to the tray docking mechanism C is inclined downward. This is to ensure that when the empty tray A returns to the discharging station of the production line B, the movement of the tray A can also press down the rotating plate 43, ensuring that the empty tray A can automatically return to the discharging station of the production line B.

[0044] As Figure 3 shown, a limiting structure 44 is also provided at the lower part of the open end of the U-shaped seat 42.

[0045] As an alternative embodiment of the present utility model, the limiting structure 44 is provided to prevent the rotating plate 43 from rotating too much and completely unable to rotate back when it is pressed down by the tray A, avoiding the failure of the function of assisting in pushing the tray A.

[0046] As Figure 2 shown, the lifting unit 3 is a scissors lift 31. The lifting unit 3 further includes a base 30 and a second driving unit 311. The connecting rods 312 at the top and bottom on one side of the scissors lift 31 are respectively slidably connected to the bottom of the lifting table 1 and the base 30. The second driving unit 311 includes a telescopic rod 313 rotatably connected inside the base 30, and the free end of the telescopic rod 313 is connected to the connecting rod 312 on the same side as the bottom of the scissors lift 31.

[0047] As an alternative embodiment of the present utility model, when the telescopic rod 313 extends, the scissors lift 31 unfolds, causing the lifting table 1 to rise; driving the entire lifting table 1, the conveying unit 2 and the tray A through the scissors lift 31 can quickly drive the tray A to lift and lower. Therefore, this technical solution is especially suitable for workpieces with a relatively light weight or the workpiece discharging end of the production line B.

[0048] Embodiment 3:

[0049] As Figure 4-5As shown in the figure, the lifting unit 3 is a ball screw mechanism 32. The lifting unit 3 further includes a base 30, a linkage rod 321 and a third driving unit 322. The linkage rod 321 is connected to the ball screw mechanism 32. The third driving unit 322 includes a second motor 322a, and the second motor 322a drives a plurality of linkage rods 321 to rotate synchronously.

[0050] As an optional embodiment of the present utility model, the ball screw mechanism 32 has a strong load-bearing capacity and is relatively slow. Moreover, one second motor 322a drives all the ball screw mechanisms 32 to operate simultaneously. Therefore, it is more suitable for heavier workpieces and can make the receiving or sending out of the tray A more stable.

[0051] As Figure 5-6 shown in the figure, the lifting table 1 is provided with an opening between the two conveying units 2. The base 30 is further provided with a side tray conveying unit 5 located within the opening. The length direction of the side tray conveying unit 5 is perpendicular to the length direction of the conveying unit 2. A limiting plate 51 is provided on one side of the side tray conveying unit 5 and below the conveying unit 2.

[0052] As an optional embodiment of the present utility model, the side tray conveying unit 5 can receive or send out the lateral tray A. Therefore, this technical solution is applicable to the situation where the loading and unloading on the production line B are on the same side. The limiting plate 51 restricts the descending position of the conveying unit 2.

[0053] As Figure 6 shown in the figure, the side tray conveying unit 5 includes one of a chain 50 and a belt. The two side tray conveying units 5 are coaxially connected by a coaxial rod 52. The base 30 is further provided with a third motor 53 for driving the coaxial rod 52 to rotate.

[0054] As an optional embodiment of the present utility model, the third motor 53 drives the coaxial rod 52 to rotate, thereby driving the side tray conveying unit 5 to rotate, enabling the tray A to move on the side tray conveying unit 5.

[0055] As Figure 6 shown in the figure, a limiting belt 54 is further provided between the side tray conveying unit 5 and the lifting table 1.

[0056] As an optional embodiment of the present utility model, the limiting belt 54 is provided to prevent the lifting table 1 from rising too high.

[0057] As Figure 7 shown in the figure, it further includes a side tray docking unit 6, including one of a chain 60 and a belt. The side tray docking unit 6 is provided on the side of the lifting table 1, and the length directions of the two side tray docking units 6 are respectively aligned with the directions of the two side tray conveying units 5.

[0058] As an optional implementation of the present utility model, the side plate docking unit 6 can transfer the tray A between the loading and unloading station of the production line B and the side plate conveying unit 5, and the specific structure can adopt the same structure as that of the side plate conveying unit 5.

[0059] The working principle and usage process of the present utility model: The tray A is transferred from the loading and unloading station of the production line B to the conveying unit 2, the lifting unit 3 operates, so that the lifting table 1 rises. When the top of the conveying unit 2 is at the same height as the top of the tray docking mechanism C, the conveying unit 2 starts and sends the tray A to the tray docking mechanism C.

[0060] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pallet lifting mechanism, characterized in that: include: The lifting platform is located between the production line and the pallet docking mechanism; A conveying unit, comprising one of a chain and a belt, wherein the length direction of the conveying unit is parallel to the moving direction of the pallet; The lifting unit includes a scissor frame and a ball screw mechanism; the lifting unit is arranged at the bottom of the lifting platform; The two conveying units are rotatably connected to the two sides of the lifting platform respectively, and a supporting plate fixedly connected to the lifting platform is provided in the conveying unit; The lifting platform is also provided with a pushing plate unit, which includes an electric push rod, a U-shaped seat and a rotating plate. The electric push rod is arranged on the lifting platform and its length direction is aligned with the length direction of the conveying unit. The U-shaped seat is fixedly connected to the ejection end of the electric push rod and its opening direction is toward the ejection direction of the electric push rod; the rotating plate is rotatably connected between the two side walls of the U-shaped seat, and the upper end of the rotating plate can be pushed into the U-shaped seat when the tray passes by.

2. A pallet lifting mechanism according to claim 1, characterized in that: The transmission unit further comprises a first driving unit, which comprises a synchronization rod and a first motor for driving the synchronization rod to rotate, and both ends of the synchronization rod are coaxially connected to the two transmission units.

3. A pallet lifting mechanism according to claim 1, characterized in that: A limiting structure is also provided at the lower part of the opening end of the U-shaped seat.

4. A pallet lifting mechanism according to any one of claims 1 to 3, characterized in that: The lifting unit is a scissors frame, which also includes a base and a second driving unit. The connecting rods at the top and bottom of one side of the scissors frame are slidably connected to the bottom of the lifting platform and the base respectively. The second driving unit includes a telescopic rod rotatably connected to the base, and the free end of the telescopic rod is connected to the connecting rod on the same side of the bottom of the scissors frame.

5. A pallet lifting mechanism according to any one of claims 1 to 3, characterized in that: The lifting unit is a ball screw mechanism, and the lifting unit also includes a base, a linkage rod and a third driving unit. The linkage rod is connected to the ball screw mechanism, and the third driving unit includes a second motor, and the second motor drives multiple linkage rods to rotate synchronously.

6. A pallet lifting mechanism according to claim 5, characterized in that: The lifting platform is provided with an opening located between the two conveying units, and the base is also provided with a side disk conveying unit located in the opening. The length direction of the side disk conveying unit is perpendicular to the length direction of the conveying unit, and a limit plate is provided on one side of the side disk conveying unit and below the conveying unit.

7. A pallet lifting mechanism according to claim 6, characterized in that: The side plate conveying unit comprises one of a chain and a belt, and the two side plate conveying units are coaxially connected through a coaxial rod. The base is also provided with a third motor for driving the coaxial rod to rotate.

8. A pallet lifting mechanism according to claim 6, characterized in that: A limiting belt is also provided between the side tray conveying unit and the lifting platform.

9. A pallet lifting mechanism according to any one of claims 7-8, characterized in that: It also includes a side plate docking unit, including one of a chain and a belt. The side plate docking unit is arranged on the side of the lifting platform, and the length directions of the two side plate docking units are respectively aligned with the directions of the two side plate conveying units.

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