A pallet lifting and positioning device

Abstract

This utility model discloses a pallet lifting and positioning device, including a fixed bracket, a flipping bracket, positioning mechanisms distributed on both sides of the flipping bracket, and a driving positioning mechanism. The positioning mechanism includes a positioning drive unit and positioning pins corresponding to positioning holes on the side of the pallet. Multiple positioning pins are connected to the output end of the positioning drive unit through an adaptive adjustment component. It also includes a clamping mechanism that drives the positioning mechanism to move along the axial direction of the positioning pins. This structure compensates for positional deviations through an elastic floating unit, and improves the stability of pallet lifting through multi-point lifting via the cooperation of inclined guide grooves and guide columns. The clamping mechanism is linked with the positioning mechanism to improve response speed. The overall structure is compact and meets the automated requirements for fast and high-precision pallet positioning.

Description

Technical Field

[0001] This utility model relates to the field of automated production line conveying technology, and in particular to a pallet lifting and positioning device. Background Technology

[0002] In automated production lines, pallets are commonly used to carry workpieces and move them along conveyor lines. To achieve automated processing and assembly of products on pallets, precise positioning of the pallets is necessary to ensure their alignment with the actuators. To improve assembly efficiency and accuracy, some assembly processes require rotating the pallet to a specific angle. Therefore, the accuracy and reliability requirements for automated pallet handling throughout the production line, including lifting, positioning, and clamping, are significantly increased. However, current technologies often achieve pallet positioning through hard contact between the positioning mechanism and the pallet. This positioning is prone to deviation due to manufacturing errors or long-term wear, resulting in poor adaptability of the positioning mechanism, frequent calibration, and reduced processing efficiency. Furthermore, lifting mechanisms typically use cylinders or motors for direct lifting, leading to uneven load distribution and potential pallet tilting. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a pallet lifting and positioning device.

[0004] The technical solution of this utility model is as follows: it includes a fixed bracket, a flip bracket rotatably connected to the fixed bracket via a rotating arm, and positioning mechanisms distributed on both sides of the flip bracket. The positioning mechanism includes a positioning drive unit and positioning pins corresponding to the positioning holes on the side of the tray. Multiple positioning pins are connected to the output end of the positioning drive unit through an adaptive adjustment component.

[0005] A further technical solution is that the adaptive adjustment component includes an elastic floating unit, and the positioning pin compensates for the positional deviation with the tray positioning hole by elastic displacement in the radial direction through the elastic floating unit.

[0006] A further technical solution is as follows: the fixed support is provided with lifting mechanisms on both sides along the pallet conveying direction. The lifting mechanism includes: a lifting drive unit and several lifting platforms arranged at intervals along the conveying direction. Each lifting platform is slidably connected to the fixed support through a vertical guide rail under the drive of the lifting drive unit.

[0007] A further technical solution is that the lifting mechanism also includes guide plates corresponding to each lifting platform, and each guide plate is horizontally displaced relative to the fixed support under the drive of the lifting drive unit; the end face of the guide plate opposite to the lifting platform is provided with mutually cooperating oblique guide grooves and guide columns.

[0008] A further technical solution is: it also includes a clamping mechanism, which includes a clamping drive unit and two clamping plates that move axially along the positioning pin under the drive of the clamping drive unit; the positioning drive unit is disposed below the clamping plates.

[0009] A further technical solution is that the clamping plate is slidably connected to the flipping bracket via a linear guide rail extending axially along the positioning pin.

[0010] A further technical solution is that the clamping drive unit is a dual-sided output motor or a synchronously controlled dual cylinder.

[0011] A further technical solution is that it also includes a pressing mechanism, which includes a pressing cylinder and a pressing head driven by the pressing cylinder to press the tray.

[0012] A further technical solution is that several clamping mechanisms are evenly distributed along the periphery of the pallet.

[0013] The beneficial technical effects of this utility model are as follows: The elastic floating unit allows the positioning pin to move radially elastically, automatically compensating for positional deviations in the pallet positioning holes, reducing reliance on pallet processing and placement accuracy, and improving positioning tolerance and stability. The lifting mechanism, using an inclined guide groove and guide column, converts horizontal drive into vertical lifting, resulting in a compact structure and high synchronization, ensuring smooth pallet lifting. In the clamping mechanism, the clamping plates on both sides move axially along the positioning pin via dual-sided synchronous drive to maintain uniform clamping force. The positioning mechanism is installed below the clamping plates to improve response speed, resulting in a compact structure. A uniformly distributed pressing mechanism achieves stable clamping of the entire pallet area, preventing slight displacement during the flipping process. The overall structure achieves full automation of the pallet lifting, positioning, clamping, and pressing process, combining high precision, flexibility, and reliability to achieve efficient assembly of products on the pallet. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the flip-up bracket of this utility model when it is in a horizontal position;

[0015] Figure 2 This is a schematic diagram of the positioning mechanism and clamping mechanism of the flip bracket when it flips;

[0016] Figure 3 This is a schematic diagram of the specific structure of the lifting mechanism of this utility model;

[0017] Figure 4 This is a utility model Figure 3 A magnified schematic diagram of a local structure;

[0018] Figure 5 This is a schematic diagram of the specific structure of the positioning mechanism of this utility model;

[0019] The components include: 1. Fixed bracket; 11. Support base; 2. Lifting mechanism; 21. Lifting drive unit; 22. Lifting platform; 23. Mounting plate; 24. Guide plate; 25. Angled guide groove; 26. Guide column; 3. Tilting bracket; 4. Positioning mechanism; 41. Positioning drive unit; 42. Positioning pin; 43. Elastic floating unit; 44. Connector; 5. Clamping mechanism; 51. Clamping drive unit; 52. Clamping plate; 6. Pressing mechanism; 61. Pressing cylinder; 62. Pressing head. Detailed Implementation

[0020] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] like Figure 1 and Figure 2 As shown, the present invention discloses a pallet lifting and positioning device, wherein the pallet is provided with a product placement worktable, and the pallet is controlled to flip to a set angle to complete product assembly. The lifting and positioning mechanism 4 includes a fixed bracket 1, a lifting mechanism 2, a flipping bracket 3, and a positioning mechanism 4. The flipping bracket 3 is rotatably connected to the fixed bracket 1 through rotating arms on both sides.

[0022] The rotating arms on both sides are located at the two corners of the fixed bracket 1, and the other two corners of the fixed bracket 1 are respectively provided with support seats 11. The two sets of support seats 11 are used to provide support when the flip bracket 3 is in a horizontal position.

[0023] like Figure 3 and Figure 4 Two sets of lifting mechanisms 2 are symmetrically arranged on both sides of the fixed bracket 1 along the pallet conveying direction. Each set of lifting mechanisms 2 includes a lifting drive unit 21, several lifting platforms 22 arranged at intervals along the pallet conveying direction, a mounting plate 23 fixed to the fixed bracket 1, and a guide plate 24 slidably connected to the mounting plate 23. The lifting platforms 22 are connected to the lifting drive unit 21 and are slidably engaged with the mounting plate 23 via a vertical guide rail. The guide plate 24 is slidably engaged with the mounting plate 23 via a horizontal guide rail. The end faces of the guide plate 24 and the lifting platforms 22 are respectively provided with mutually cooperating oblique guide grooves 25 and guide columns 26. When the lifting drive unit 21 drives the guide plate 24 to move horizontally, the lifting platforms 22 are driven to rise and fall along the vertical guide rail through the cooperation of the guide grooves and guide columns 26. The lifting platforms 22 are used to lift the pallet to a predetermined height in the material receiving condition and to receive the pallet and lower and release the pallet in the material discharging condition.

[0024] The lifting platform 22 raises the pallet to a predetermined height, and the positioning mechanisms 4 located on both sides of the flipping bracket 3 operate synchronously to clamp and position the pallet; the lifting platform 22 then descends to its initial position. This lifting mechanism, through the cooperation of the guide groove 25 and the guide column 26, converts horizontal drive into vertical lifting, with a compact structure and high synchronization, ensuring smooth pallet lifting; the spaced arrangement of multiple lifting platforms 22 enhances load balance.

[0025] Specifically, such as Figure 5 As shown, the positioning mechanism 4 includes a positioning drive unit 41 and positioning pins 42; multiple positioning holes are provided on both sides of the tray, and multiple positioning pins 42 corresponding to the positioning holes are connected to the output end of the positioning drive unit 41 for transmission. When the lifting platform 22 lifts the tray to a predetermined height, the positioning drive units 41 on both sides synchronously drive multiple positioning pins 42 to insert into the corresponding positioning holes to achieve multi-point clamping and positioning.

[0026] Furthermore, the end of the positioning pin 42 is provided with a guide cone surface, which facilitates alignment and insertion with the positioning hole.

[0027] Furthermore, to achieve precise alignment between each positioning pin 42 and the positioning hole, and to improve the adaptive adjustment capability of each positioning pin 42, each positioning pin 42 is connected to the output end of the positioning drive unit 41 through an adaptive adjustment component. The adaptive adjustment component includes an elastic floating unit 43, through which the positioning pin 42 undergoes elastic displacement in the radial direction to compensate for positional deviations from the pallet positioning hole. This reduces the dependence on pallet processing accuracy and placement accuracy, and improves positioning tolerance and stability.

[0028] In this embodiment, the elastic floating unit 43 uses a spring, and a transmission rod is fixed at the output end of the positioning drive unit 41. The spring is sleeved on the outer periphery of the transmission rod. Each positioning pin 42 is connected by a connector 44, and the connector 44 is connected to the spring through a connecting part. During the radial movement of the connector 44 along the positioning pin 42 under the drive of the positioning drive unit 41, when there is a positional deviation between the positioning pin 42 and the positioning hole, the positioning pin 42 moves radially with the elastic deformation of the spring to achieve multi-point adaptive clamping positioning.

[0029] Furthermore, to ensure stable clamping of the positioning mechanism 4, the flipping bracket 3 is also equipped with a clamping mechanism 5. The clamping mechanism 5 includes a clamping drive unit 51 and two clamping plates 52 that move axially along the positioning pin 42 under the drive of the clamping drive unit 51. The two clamping plates 52 are slidably connected to the flipping bracket 3 via linear guide rails extending axially. The clamping plates 52 and the connecting members 44 on the same side extend in the same direction. The connecting members 44 are slidably connected below the clamping plates 52 via linear guide rails extending axially along the positioning pin 42. The clamping drive unit 51 is a dual-output motor or a synchronously controlled dual cylinder. The dual-side synchronous drive ensures uniform clamping force on both clamping plates 52; the positioning mechanism 4 is directly integrated below the clamping plates 52, simplifying the structure and improving the response speed.

[0030] Furthermore, the flipping bracket 3 is also equipped with a clamping mechanism 6, which includes a clamping cylinder 61 and a pressure head 62 that presses the tray downward under the drive of the clamping cylinder 61. Several clamping mechanisms 6 are evenly distributed along the periphery of the tray, and the clamping mechanisms 6 ensure that the tray remains stable during the flipping process driven by the flipping bracket 3, so as to meet the needs of high-precision operation scenarios.

[0031] This mechanism automates the entire process of pallet lifting, positioning, clamping, and pressing, combining high precision, flexibility, and reliability to significantly improve the efficiency and safety of pallet handling in automation or production lines.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pallet jacking positioning device, characterized by: It includes a fixed bracket (1), a flip bracket (3) rotatably connected to the fixed bracket (1) via a rotating arm, and positioning mechanisms (4) distributed on both sides of the flip bracket (3). The positioning mechanism (4) includes a positioning drive unit (41) and positioning pins (42) corresponding to the positioning holes on the side of the tray. Multiple positioning pins (42) are connected to the output end of the positioning drive unit (41) through an adaptive adjustment component.

2. The pallet lifting and positioning device according to claim 1, characterized in that: The adaptive adjustment component includes an elastic floating unit (43), and the positioning pin (42) compensates for the positional deviation with the tray positioning hole by the elastic displacement in the radial direction of the elastic floating unit (43).

3. The pallet lifting and positioning device according to claim 1, characterized in that: The fixed support (1) is provided with lifting mechanisms (2) on both sides along the pallet conveying direction. The lifting mechanism (2) includes: a lifting drive unit (21) and several lifting platforms (22) arranged at intervals along the conveying direction. Each lifting platform (22) is slidably connected to the fixed support (1) through a vertical guide rail under the drive of the lifting drive unit (21).

4. The pallet lifting and positioning device according to claim 3, characterized in that: The lifting mechanism (2) also includes guide plates (24) corresponding to each lifting platform (22). Each guide plate (24) is horizontally displaced relative to the fixed bracket (1) under the drive of the lifting drive unit (21). The end face of the guide plate (24) opposite to the lifting platform (22) is provided with mutually cooperating oblique guide grooves (25) and guide columns (26).

5. A pallet lifting and positioning device according to claim 1, characterized in that: It also includes a clamping mechanism (5), which includes a clamping drive unit (51) and two clamping plates (52) that move axially along the positioning pin (42) under the drive of the clamping drive unit (51); the positioning drive unit (41) is located below the clamping plates (52).

6. A pallet lifting and positioning device according to claim 5, characterized in that: The clamping plate (52) is slidably connected to the flipping bracket (3) via a linear guide rail extending axially along the positioning pin (42).

7. A pallet lifting and positioning device according to claim 5, characterized in that: The clamping drive unit (51) is a dual-output motor or a synchronously controlled dual cylinder.

8. A pallet lifting and positioning device according to claim 1, characterized in that: It also includes a clamping mechanism (6), which includes a clamping cylinder (61) and a pressure head (62) driven by the clamping cylinder (61) to clamp the tray.

9. A pallet lifting and positioning device according to claim 8, characterized in that: Several clamping mechanisms (6) are evenly distributed along the periphery of the tray.

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