Vertical lifting device and SMT loading and unloading robot

Abstract

The utility model relates to the technical field of feeding and discharging devices, in particular to a vertical lifting device and a surface mount technology (SMT) feeding and discharging robot, which comprises a vertical guide rail, a lifting plate and a guide assembly, at least one group of positive rollers are arranged and abut against the corresponding first side walls; at least two groups of side rollers are vertically distributed, and one group of side rollers are in rolling contact with the second side wall and are separated from the third side wall; the vertical lifting device has the beneficial effects that the cost of the vertical lifting device can be effectively reduced, and the overall mass and the overall size can be reduced more easily. The two groups of vertical guide rails are matched with the guide assembly to limit the sliding track of the lifting plate, the lifting layout mode is simple in structure, compact in layout and easy to assemble, and popularization is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of loading and unloading devices, in particular to a vertical lifting device and an SMT loading and unloading robot. Background Art

[0002] SMT (Surface Mount Technology) is the surface assembly technology of electronic circuits, also known as surface mount or surface mounting technology. It is the most popular technology and process in the electronics assembly industry.

[0003] In the workshop where SMT patch molding PCB boards are produced, the SMT loading and unloading robots use a lifting device to drive the working platform up and down, realizing the automatic loading and unloading and transfer of the turnover baskets and tooling that carry or clamp the square structures of PCB boards, making the entire production process unmanned, thereby greatly improving the company's production efficiency.

[0004] Existing SMT loading and unloading robots are typically powered by electric motors, using ball screws or chains for transmission, with linear vertical guides and sliders acting as motion guides to achieve the lifting and lowering of the work platform. These lifting devices often require high-strength steel brackets, which are bulky and heavy, and difficult to assemble, making them inconvenient for robot assembly and production. Utility Model Content

[0005] (1) Technical issues to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a vertical lifting device, which solves the technical problems in the prior art that the lifting device of the loading and unloading robot is bulky and heavy, and is difficult to assemble, making it inconvenient for the assembly and production of the robot.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0009] In the first aspect, the utility model provides a vertical lifting device, including a vertical guide rail, a lifting plate and a guide assembly, the vertical guide rails are arranged into two parallel groups, and the guide assembly is arranged into two groups located on both sides of the lifting plate; the vertical guide rail includes a first side wall and a second side wall and a third side wall connected at both ends of the first side wall, and the cross-section of the two groups of vertical guide rails is C-shaped and the openings are opposite to each other; the guide assembly includes positive rollers and side rollers that are both connected to the lifting plate for transverse rotation; at least one group of positive rollers is arranged and abuts against the corresponding first side wall; the side rollers are at least arranged into two groups distributed vertically, one group of side rollers is in rolling contact with the second side wall and is separated from the third side wall; the other group of side rollers is separated from the second side wall and is in rolling contact with the third side wall.

[0010] Secondly, the utility model provides an SMT loading and unloading robot, including the vertical lifting device in the above technical solution, and also including an operating platform and a moving chassis. The operating platform is fixedly connected to the lifting plate, and the moving chassis is fixedly connected to the bottom ends of the two sets of vertical guide rails.

[0011] (3) Beneficial effects

[0012] The beneficial effects of the present invention are as follows: the vertical lifting device and SMT loading and unloading robot of the present invention, since the cross-sections of the two sets of vertical guide rails are open and relative to each other in a C-shape, when the guide assembly is connected to the corresponding vertical guide rail, the positive rollers in the two sets of guide assemblies respectively abut the first side walls of the two sets of vertical guide rails in the X-axis direction, and the relative position of the lifting plate and the guide assembly is fixed, thereby limiting the freedom of the lifting plate to move along the X-axis, rotate along the Z-axis and rotate along the Y-axis; the two side rollers in one set of guide assemblies, since they are in fixed contact with the second side wall and the third side wall respectively, limit the freedom to rotate along the X-axis and move along the Y-axis, therefore, the lifting plate only has the freedom to move along the Z-axis, thereby realizing the limitation of the sliding trajectory of the lifting plate.

[0013] Since the present invention relies on a vertical guide rail with a C-shaped cross-section, and the vertical guide rail of this structure has a higher structural strength than the guide rail of the traditional structure, the material strength requirement will be lower, which can effectively reduce the cost of the vertical lifting device and make it easier to reduce the curb weight and overall volume. At the same time, the side rollers and the positive rollers in the present invention are in rolling contact with the vertical guide rails, thereby ensuring the service life of the vertical guide rails, thereby increasing the service life of the entire vertical lifting device. In addition, the two sets of vertical guide rails cooperate with the guide assembly to realize the sliding trajectory restriction of the lifting plate. It is a lifting layout mode with a simple structure, compact layout, and easy assembly, which is conducive to promotion and popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the vertical lifting device of the utility model;

[0015] Figure 2 This is an enlarged structural diagram of the guide assembly of the utility model;

[0016] Figure 3 This is a schematic structural diagram of the guide assembly and lifting plate of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the rotary drive member, transmission shaft and driving wheel of the utility model;

[0018] Figure 5 This is a structural diagram of the SMT loading and unloading robot of the present invention.

[0019] [Description of Reference Numerals]

[0020] 1. Vertical guide rail; 11. First side wall; 12. Second side wall; 13. Third side wall;

[0021] 2. Lifting board; 21. Vertical board;

[0022] 3. Guide assembly; 31. Positive roller; 32. Side roller;

[0023] 4. Rotary drive components;

[0024] 5. Transmission assembly; 51. Driving pulley; 52. Driven pulley; 53. Transmission belt;

[0025] 6. Drive shaft;

[0026] 7. Top plate;

[0027] 8. Fixed plate;

[0028] 9. Working platform;

[0029] 10. Sports chassis;

[0030] 11. Locking assembly. DETAILED DESCRIPTION

[0031] In order to better explain the present invention, and to facilitate understanding, the following Figure 1-Figure 5 , through the specific implementation method, the utility model is described in detail. Among them, the directional nouns such as "upper" and "lower" mentioned in this article are Figure 1 The orientation is referenced.

[0032] Example 1:

[0033] Reference Figure 1-Figure 5 , an embodiment of the utility model provides a vertical lifting device, including a vertical guide rail 1, a lifting plate 2 and a guide assembly 3, the vertical guide rail 1 is arranged into two parallel groups, and the guide assembly 3 is arranged into two groups located on both sides of the lifting plate 2; the vertical guide rail 1 includes a first side wall 11 and a second side wall 12 and a third side wall 13 connected at both ends of the first side wall 11, and the cross-section of the two groups of vertical guide rails 1 is C-shaped and the openings are opposite to each other; the guide assembly 3 includes side rollers 32 and positive rollers 31, both of which are connected to the lifting plate 2 in a transverse rotation; at least one group of positive rollers 31 is provided and abuts against the corresponding first side wall 11; the side rollers 32 are at least arranged into two groups distributed vertically, one group of side rollers 32 is in rolling contact with the second side wall 12 and is separated from the third side wall 13; the other group of side rollers 32 is separated from the second side wall 12 and is in rolling contact with the third side wall 13.

[0034] Specifically, the first side wall 11 is configured to extend along a vertical plane where the Y axis is located, and the second side wall 12 and the third side wall 13 are configured to extend along a vertical plane where the X axis is located.

[0035] In this embodiment, since the cross-section of the two groups of vertical guide rails 1 is a C-shape with openings facing each other, when the guide assembly 3 is connected to the corresponding vertical guide rail 1, the positive rollers 31 in the two groups of guide assemblies 3 respectively abut the first side walls 11 of the two groups of vertical guide rails 1 in the X-axis direction, and the relative position of the lifting plate 2 and the guide assembly 3 is fixed, thereby limiting the freedom of the lifting plate 2 to move along the X-axis, rotate along the Z-axis, and rotate along the Y-axis; the two side rollers 32 in one group of guide assemblies 3 are respectively fixedly contacted with the second side wall 12 and the third side wall 13, thereby limiting the freedom to rotate along the X-axis and move along the Y-axis, so the lifting plate 2 only has the freedom to move along the Z-axis, thereby achieving the limitation of the sliding trajectory of the lifting plate 2.

[0036] Since the present invention relies on a vertical guide rail 1 with a C-shaped cross-section, and the vertical guide rail 1 of this structure has a higher structural strength than the guide rail of the traditional structure, the material strength requirement will be lower, which can effectively reduce the cost of the vertical lifting device and make it easier to reduce the curb weight and overall volume. At the same time, the side rollers 32 and the positive rollers 31 of the present invention are in rolling contact with the vertical guide rail 1, thereby ensuring the service life of the vertical guide rail 1, thereby increasing the service life of the entire vertical lifting device. In addition, the two sets of vertical guide rails 1 cooperate with the guide assembly 3 to achieve the sliding trajectory restriction of the lifting plate 2. It is a lifting layout mode with a simple structure, compact layout, and easy assembly, which is conducive to promotion and popularization.

[0037] The vertical guide rail 1 can be an aluminum alloy guide rail, thereby achieving lower mass and higher strength.

[0038] Example 2:

[0039] Reference Figure 1-Figure 5 In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0040] The guide assembly 3 includes two groups of vertically arranged positive rollers 31 .

[0041] In this embodiment, by providing two sets of vertical positive rollers 31, the contact area between the positive rollers 31 and the first side wall 11 can be increased, thereby improving the operational stability and reliability of the guide assembly 3. Furthermore, because the two sets of vertically arranged side rollers 32 can better limit the degree of freedom of rotation of the lifting plate 2 along the Y-axis, the operational stability and reliability of the guide assembly 3 can be further improved.

[0042] Example 3:

[0043] Reference Figure 1-Figure 5 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0044] The lifting plate 2 includes two groups of vertical plates 21. The side rollers 32 and the positive rollers 31 are connected to the vertical plates 21 respectively. The vertical plates 21 are matched with the corresponding vertical guide rails 1 in the horizontal clearance and can cover the openings of the corresponding vertical guide rails 1 in the horizontal direction.

[0045] In this embodiment, the vertical plate 21 is not only used to support the side rollers 32 and the positive roller 31, but also can protect the side rollers 32 and the positive roller 31, and can to a certain extent prevent debris from entering the vertical guide rail 1 during the use of the lifting device, thereby improving the reliability of the lifting device.

[0046] Example 4:

[0047] Reference Figure 1-Figure 5 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0048] The vertical lifting device also includes a rotary driving member 4 and a transmission assembly 5 supported on the vertical guide rail 1. The transmission assembly 5 includes a driving wheel 51, a driven wheel 52 and a transmission belt 53. The driving wheel 51 and the driven wheel 52 are respectively rotatably connected to the two ends of the vertical guide rail 1. The transmission belt 53 links the driving wheel 51 and the driven wheel 52. The driving wheel 51 is drivingly connected to the rotary driving member 4; the lifting plate 2 and the transmission belt 53 are fixedly connected, the driving wheel 51 and the driven wheel 52 are both synchronous wheels, and the transmission belt 53 is a synchronous belt.

[0049] In this embodiment, the rotary drive member 4 includes a motor and a reducer, which realize the rotation function of the lifting plate 2 through precise control. The motor is configured as a servo motor. The rotary drive member 4 is supported on the vertical guide rail 1 to ensure its stability and reliability during operation. At the same time, it is connected to the driving wheel 51 through a driving connection to transmit power to the transmission assembly 5. The driving wheel 51 and the driven wheel 52 are respectively rotatably connected to the two ends of the vertical guide rail 1. Both are synchronous wheels with precise tooth profiles and transmission ratios to ensure the smooth operation and precise control of the transmission belt 53. The transmission belt 53 adopts a synchronous belt with high strength and high wear resistance. It is used to transmit the power of the driving wheel 51 to the driven wheel 52 and drive the lifting plate 2 to perform lifting and lowering movements. At the same time, due to the precise transmission characteristics of the synchronous belt, the lifting accuracy and stability of the lifting plate 2 can be ensured. The lifting plate 2 is connected to the synchronous belt by a fixed connection. The movement of the transmission belt 53 can drive the lifting plate 2 to move up and down.

[0050] By means of the rotary drive member 4 and the transmission assembly 5 in this embodiment, the lifting plate 2 can be driven stably, reliably and with high precision, thereby improving the reliability of the lifting device.

[0051] The vertical lifting device also includes a transmission shaft 6 rotatably connected to one end of the vertical guide rail 1;

[0052] The transmission components 5 are arranged into two parallel groups. The two driving wheels 51 corresponding to the two groups of transmission components 5 are respectively fixedly connected to the two ends of the transmission shaft 6. The two transmission belts 53 corresponding to the two groups of transmission components 5 are both fixedly connected to the lifting plate 2. The two driving wheels 51 can be linked through the transmission shaft 6. The two groups of transmission components 5 can also improve the stability of the force applied to the lifting plate 2 when it is raised and lowered.

[0053] The vertical lifting device also includes a top plate 7, which is fixedly connected to the top ends of the two sets of vertical guide rails 1 to form an installation platform for the rotary drive member 4, the driving wheel 51 and the transmission shaft 6, thereby ensuring the operating stability of the rotary drive member 4, the driving wheel 51 and the transmission shaft 6, and is also conducive to optimizing the layout of the rotary drive member 4, the driving wheel 51 and the transmission shaft 6, thereby improving the structural compactness of the vertical lifting device.

[0054] The transmission assembly 5 further includes two sets of fixing plates 8 for fixing the lifting plate 2 and the corresponding transmission belts 53 , thereby ensuring the stability and reliability of the transmission belts 53 in driving the lifting plate 2 to operate.

[0055] Example 5:

[0056] Reference Figure 1-Figure 5 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0057] The vertical lifting device also includes a locking assembly 100; one driving wheel 51 is connected to the transmission shaft 6 through a key to transmit torque, and the other driving wheel 51 is connected to the transmission shaft 6 through the locking assembly 100 to transmit torque, and then the angle between the corresponding driving wheel 51 and the transmission shaft 6 is adjusted through the locking assembly 100 to level the lifting plate 2; the locking assembly 100 is configured as an expansion sleeve.

[0058] In this embodiment, through the locking assembly 100, the corresponding driving wheel 51 can change the relative angle with the transmission shaft 6 as needed, thereby changing the traction height of the synchronous belt for the lifting plate 2. In this way, when the lifting plate 2 has problems such as uneven traction force and uneven height, the locking assembly 100 can be used to change the angle of the corresponding driving wheel 51 relative to the transmission shaft 6, thereby changing the position of the synchronous belt and balancing the traction height of the synchronous belt for the lifting plate 2, which is beneficial to ensuring the stability and reliability of the lifting plate 2.

[0059] Example 6:

[0060] Figure 1-Figure 5 In addition to providing an SMT loading and unloading robot including the vertical lifting device of any of the above-mentioned embodiments, the present invention also includes a work platform 9 and a motion chassis 10. The work platform 9 is fixedly connected to the lifting plate 2, and the motion chassis 10 is fixedly connected to the bottom ends of the two sets of vertical guide rails 1. Therefore, the SMT loading and unloading robot includes the vertical lifting device of any of the above-mentioned embodiments. To avoid repetition, a detailed description is omitted here. At the same time, the robot can also achieve flexible maneuverability by relying on the motion chassis 10, improving its usability.

[0061] It can be understood that, except for any conflicting parts, the above-mentioned embodiments 1-6 can be freely combined to form other implementation methods of the present invention.

[0062] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0063] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0064] In the present invention, unless otherwise expressly specified or limited, when a first feature is “above” or “below” a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0065] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0066] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A vertical lifting device, characterized in that: It comprises a vertical guide rail (1), a lifting plate (2) and a guide assembly (3), wherein the vertical guide rail (1) is arranged as two parallel groups, and the guide assembly (3) is arranged as two groups located on both sides of the lifting plate (2); The vertical guide rail (1) comprises a first side wall (11) and a second side wall (12) and a third side wall (13) connected to both ends of the first side wall (11), and the cross sections of the two sets of vertical guide rails (1) are C-shaped with their openings facing each other; The guide assembly (3) includes a positive roller (31) and a side roller (32) both of which are laterally rotatably connected to the lifting plate (2); the positive roller (31) is provided in at least one group and is in contact with the corresponding first side wall (11); the side rollers (32) are provided in at least two groups distributed vertically, one group of the side rollers (32) is in rolling contact with the second side wall (12) and is separated from the third side wall (13); the other group of the side rollers (32) is separated from the second side wall (12) and is in rolling contact with the third side wall (13).

2. The vertical lifting device according to claim 1, characterized in that: The guide assembly (3) comprises two groups of vertically arranged positive rollers (31).

3. The vertical lifting device according to claim 1, characterized in that: The lifting plate (2) comprises two groups of vertical plates (21), the side rollers (32) and the positive rollers (31) are respectively connected to the vertical plates (21), and the vertical plates (21) are fitted with the corresponding vertical guide rails (1) in a transverse clearance and can cover the openings of the corresponding vertical guide rails (1) in the transverse direction.

4. The vertical lifting device according to claim 1, wherein: The invention also includes a rotary drive member (4) and a transmission assembly (5) supported on the vertical guide rail (1), wherein the transmission assembly (5) includes a driving wheel (51), a driven wheel (52) and a transmission belt (53), wherein the driving wheel (51) and the driven wheel (52) are respectively rotatably connected to the two ends of the vertical guide rail (1), and the transmission belt (53) links the driving wheel (51) and the driven wheel (52), and the driving wheel (51) is drivingly connected to the rotary drive member (4); the lifting plate (2) and the transmission belt (53) are fixedly connected; The driving wheel (51) and the driven wheel (52) are both synchronous wheels, and the transmission belt (53) is a synchronous belt.

5. The vertical lifting device according to claim 4, characterized in that: It also includes a transmission shaft (6) rotatably connected to one end of the vertical guide rail (1); The transmission components (5) are arranged in two parallel groups, the two driving wheels (51) corresponding to the two groups of transmission components (5) are respectively fixedly connected to the two ends of the transmission shaft (6), and the two transmission belts (53) corresponding to the two groups of transmission components (5) are both fixedly connected to the lifting plate (2).

6. The vertical lifting device according to claim 5, characterized in that: Also included is a locking assembly (100); One of the driving wheels (51) is connected to the transmission shaft (6) via a key to transmit torque, and the other driving wheel (51) is connected to the transmission shaft (6) via the locking assembly (100) to transmit torque, and the angle between the corresponding driving wheel (51) and the transmission shaft (6) is adjusted via the locking assembly (100) to level the lifting plate (2); The locking assembly (100) is configured as an expansion sleeve.

7. The vertical lifting device according to claim 6, characterized in that: It also includes a top plate (7) which is fixedly connected to the top ends of the two sets of vertical guide rails (1) to form a mounting platform for the rotary drive member (4), the driving wheel (51) and the transmission shaft (6).

8. The vertical lifting device according to claim 4, characterized in that: The transmission assembly (5) further comprises two sets of fixing plates (8) for fixedly connecting the lifting plate (2) and the corresponding transmission belt (53).

9. The vertical lifting device according to claim 1, characterized in that: The vertical guide rail (1) is an aluminum alloy guide rail.

10. An SMT loading and unloading robot, characterized by: It comprises a vertical lifting device as described in any one of claims 1 to 9, and also comprises a working platform (9) and a moving chassis (10), wherein the working platform (9) is fixedly connected to the lifting plate (2), and the moving chassis (10) is fixedly connected to the bottom ends of the two sets of vertical guide rails (1).

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