Eccentric weight jacking mechanism

Abstract

This invention relates to the field of automatic loading and unloading assembly technology for automotive cameras, specifically an eccentric counterweight lifting mechanism. The mechanism body includes a mounting base and a lifting plate. It also includes a lifting cylinder fixedly mounted on the bottom of the mounting base. The piston rod of the lifting cylinder passes upward through the mounting base and connects to the lifting plate. Two counterweights are bolted to the other side of the lifting plate, opposite to the eccentric position of the lifting cylinder. This invention effectively balances the eccentric torque generated by the eccentric lifting of the lifting cylinder, ensuring uniform force on both sides of the lifting plate during lifting, smooth operation, reduced product vibration, and improved positioning accuracy. While ensuring lifting stability, it significantly saves vertical space, facilitating miniaturization and compact layout. Furthermore, it completely replaces manual handling, avoiding direct contact between personnel and products, overcoming the disadvantages of high labor intensity and low efficiency associated with manual handling.

Description

Technical Field

[0001] This invention relates to the field of automatic loading and unloading assembly technology for automotive cameras, specifically an eccentric counterweight lifting mechanism. Background Technology

[0002] In the 3C electronics assembly industry, the assembly process of precision components such as cameras has high requirements for environmental cleanliness and operational stability. Traditionally, the loading and unloading of camera trays is mostly done manually, that is, operators manually place the trays on or remove them from the workstation. However, this manual loading method has the following drawbacks: First, during manual operation, human hands come into direct contact with the product, which can easily contaminate the product and make it difficult to meet the strict requirements for a clean environment in camera assembly.

[0003] Secondly, the process of manually handling pallets carries the risk of them falling, which can easily damage the products. Furthermore, the handling speed is limited by the skill and physical strength of the personnel, resulting in slow transmission speed and unstable quality.

[0004] Third, the labor intensity of the operation is high, and long-term repetitive handling can easily lead to operator fatigue, affecting production efficiency and product consistency.

[0005] Therefore, some automated equipment has begun to use lifting mechanisms to achieve automatic positioning and lifting of pallets. However, existing lifting mechanisms generally have the following shortcomings: the lifting cylinders are often eccentrically set inside the equipment, which leads to uneven force on both sides of the lifting platform during the lifting process, resulting in eccentric loading and affecting the lifting stability and positioning accuracy; at the same time, due to the limited internal space of the equipment, the traditional symmetrical layout of the lifting mechanism is difficult to apply, and the mechanism layout and operation are prone to interference. Summary of the Invention

[0006] The purpose of this invention is to provide an eccentric counterweight lifting mechanism to solve the problems of unstable lifting, interference with equipment space layout, low efficiency of manual feeding, and easy contamination of products caused by the eccentric setting of existing lifting mechanisms.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an eccentric counterweight lifting mechanism, comprising a mechanism body, the mechanism body including a mounting base plate and a lifting plate, the lifting plate being disposed above the mounting base plate, an eccentric component being mounted on the lifting plate, the mechanism body further including a lifting cylinder fixedly mounted on the bottom of the mounting base plate, the piston rod of the lifting cylinder passing upward through the mounting base plate and connecting to the lifting plate, for driving the lifting plate to reciprocate in the vertical direction, two counterweights being bolted to the other side of the lifting plate relative to the eccentric position of the lifting cylinder, and a plurality of urethane rubber limiting blocks being mounted on the top surface of the mounting base plate.

[0008] Preferably, the lifting plate has a flat structure, and its area is adapted to the NG tray for assembling the camera to be supported. The lifting stroke of the lifting plate is 100mm, and the maximum lifting speed is 300mm / s.

[0009] Preferably, a mounting bracket is mounted on the mounting base plate by bolts, and the mounting base plate is fixedly mounted on the working platform of the automated equipment by the mounting bracket and bolts.

[0010] Preferably, the mounting base plate is equipped with wiring terminals by bolts, and the eccentric component is provided with an NG tray for camera assembly, the eccentric component being used to support the NG tray for camera assembly.

[0011] Preferably, the two sides of the eccentric component are provided with guide wear-resistant components to guide the NG tray for camera assembly into a predetermined position on the eccentric component in a predetermined direction.

[0012] Preferably, an L-shaped frame is bolted onto the mounting base, and a laser positioning sensor for monitoring the movement position of the NG tray used for camera assembly is mounted on the surface of the L-shaped frame.

[0013] Preferably, the piston rod end of the lifting cylinder is provided with a connector, and the bottom of the lifting plate is provided with a corresponding recessed platform. The connector is embedded in the recessed platform and fastened thereto, thereby realizing a fixed connection between the lifting cylinder and the lifting plate.

[0014] Preferably, the mechanism body further includes four guide shafts and a corresponding number of sliding bearings. The four guide shafts are respectively set at the four corners of the lifting plate. One end of each guide shaft is fixedly connected to the bottom of the lifting plate, and the lower end of the other shaft extends vertically downward and slides through the corresponding sliding bearing. The sliding bearing is fixedly installed on the mounting base plate.

[0015] Preferably, the counterweight is used to balance the eccentric load torque generated by the eccentric setting of the lifting cylinder, and the counterweight is detachably connected to the lifting plate.

[0016] Preferably, the urethane limiting block is used to limit the descent stroke of the lifting plate. The urethane limiting block is made of polyurethane elastomer material and corresponds to the position where the lifting plate has descended to its final position.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting counterweights at relative positions on the eccentric side of the lifting plate, the gravitational torque of the counterweights effectively counteracts the eccentric load torque generated by the eccentric setting of the lifting cylinder, so that the forces on both sides of the lifting plate reach dynamic balance during the lifting process, the lifting plate runs smoothly, reduces product vibration, improves positioning accuracy, and fundamentally solves the tilting and jamming problems caused by eccentric lifting.

[0018] 2. Using a single lifting cylinder as the power source eliminates the need for multiple cylinders, simplifying the equipment structure and control system. Furthermore, the lifting cylinder features a thin design and is mounted at the bottom of the mounting base. Combined with a four-guide shaft and sliding bearing guiding structure, it significantly saves vertical space while ensuring lifting stability, facilitating miniaturization and compact layout, and effectively preventing spatial interference with surrounding components during operation.

[0019] 3. It realizes automated lifting and positioning of pallets, which can be used in conjunction with the production line to complete the automatic loading and unloading of cameras and laser engraving and scanning processes, completely replacing manual handling, avoiding direct contact between personnel and products, ensuring a clean assembly environment, and overcoming the disadvantages of high labor intensity and low efficiency of manual handling.

[0020] 4. The four guide axes are symmetrically distributed at the four corners of the lifting plate, forming an all-round guiding constraint on the lifting plate. The guiding rigidity is good, the lifting plate is subjected to uniform force and moves smoothly and reliably during the lifting process, and the transmission is simple and stable, which further improves the lifting positioning accuracy and repeatability. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention; Figure 3 This is a three-dimensional exploded structural diagram of the present invention; Figure 4 This is a three-dimensional exploded structural diagram from another perspective of the present invention; Figure 5 This is a three-dimensional structural diagram of the present invention; Figure 6 For the present invention Figure 1 A partial enlarged three-dimensional structural diagram; Figure 7 For the present invention Figure 2 A partial enlarged 3D structural diagram.

[0022] In the diagram: 1. Mechanism body; 10. NG tray for camera assembly; 11. Mounting base plate; 12. Lifting plate; 13. Eccentric component; 14. Guide wear-resistant component; 15. Mounting bracket; 16. Wiring terminal; 17. Lifting cylinder; 18. Counterweight; 19. Laser positioning sensor; 110. L-shaped frame; 111. Guide shaft; 112. Polyurethane rubber limiting block; 113. Connector; 114. Sinking platform; 115. Sliding bearing. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. In addition, the terms "first," "second," "third," "upper," "lower," "left," "right," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The present invention provides a structure for an eccentric counterweight lifting mechanism as follows: Figures 1 to 7 As shown, the mechanism includes a main body 1, which includes a mounting base 11 and a lifting plate 12. The lifting plate 12 is disposed above the mounting base 11, and an eccentric component 13 is mounted on the lifting plate 12. The lifting plate 12 has a flat structure, and its area is adapted to the NG tray 10 for assembling the camera to be supported. The lifting stroke of the lifting plate 12 is 100mm, and the maximum lifting speed is 300mm / s. A mounting bracket 15 is mounted on the mounting base 11 by bolts. The mounting base 11 is fixedly mounted on the working platform of the automated equipment by the mounting bracket 15 and bolts.

[0025] A terminal block 16 is bolted onto the mounting base plate 11. An NG tray 10 for camera assembly is mounted on the eccentric component 13. The eccentric component 13 is used to support the NG tray 10 for camera assembly. Guide wear-resistant components 14 are provided on both sides of the eccentric component 13 to guide the NG tray 10 for camera assembly into a predetermined position on the eccentric component 13 in a predetermined direction. When the NG tray is conveyed to the top of the eccentric component 13 through the assembly line, the guide surfaces of the guide wear-resistant components 14 limit and guide the two sides of the NG tray to ensure that the NG tray falls accurately into the bearing range of the eccentric component 13, realizing the initial positioning of the tray when it enters the work station, and laying the foundation for subsequent precise positioning by lifting.

[0026] In this invention, the center of gravity of the eccentric component 13 is eccentrically set relative to the axis of the lifting cylinder 17, that is, the bearing center of the eccentric component 13 does not coincide with the lifting action line of the lifting cylinder 17, forming an eccentric arrangement. This eccentric arrangement is to adapt to the limited space layout inside the equipment and avoid interference between the mechanism and other components.

[0027] The main body 1 also includes a lifting cylinder 17 fixedly installed at the bottom of the mounting base plate 11. The piston rod end of the lifting cylinder 17 is provided with a connector 113, and the bottom of the lifting plate 12 is provided with a corresponding recess 114. The piston rod passes upward through the mounting base plate 11, and the connector 113 is embedded in the recess 114 and fastened thereto, so as to realize the fixed connection between the lifting cylinder 17 and the lifting plate 12. This recess fastening connection method makes the connection between the piston rod of the lifting cylinder 17 and the lifting plate 12 more stable and reliable, which can effectively transmit thrust and pull, and is easy to assemble and disassemble.

[0028] The eccentric component 13 is fixedly installed on the upper surface of the lifting plate 12, and the center of gravity of the eccentric component 13 is eccentrically set relative to the axis of the lifting cylinder 17.

[0029] The main body 1 also includes four guide shafts 111 and a corresponding number of sliding bearings 115. The four guide shafts 111 are respectively set at the four corners of the lifting plate 12. One end of each guide shaft 111 is fixedly connected to the bottom of the lifting plate 12, and the lower end of the other end extends vertically downward and slides through the corresponding sliding bearing 115. The sliding bearing 115 is fixedly installed on the mounting base plate 11. When the lifting cylinder 17 drives the lifting plate 12 to rise and fall, the four guide shafts 111 slide synchronously in the sliding bearing 115 to ensure that the lifting plate 12 moves smoothly in the vertical direction and prevents the lifting plate 12 from tilting or shaking during the lifting process.

[0030] Since the four guide shafts 111 are symmetrically distributed at the four corners of the lifting plate 12, they form an all-round guiding constraint on the lifting plate 12, which can ensure that the lifting plate 12 always maintains a horizontal posture during the lifting process and effectively prevent the lifting plate 12 from tilting or shaking during the lifting process. The guide shafts 111 pass through the sliding bearings 115 and slide in cooperation with the inner wall, forming a precise guiding constraint on the vertical lifting of the lifting plate 12, ensuring the straightness of the lifting movement and the repeatability of the positioning accuracy.

[0031] The sliding bearing 115 is embedded in the mounting hole of the mounting base plate 11, and the guide shaft 111 passes through the sliding bearing 115 and slides in cooperation with the inner wall to form a guide constraint for the vertical lifting of the lifting plate 12.

[0032] Two counterweights 18 are bolted to the other side of the lifting plate 12 relative to the eccentric position of the lifting cylinder 17. The counterweights 18 are used to balance the eccentric load torque generated by the eccentric setting of the lifting cylinder 17. The counterweights 18 and the lifting plate 12 are detachably connected. When the load conditions change, the counterweights 18 of different weights can be replaced to adapt to different working conditions, thus improving the versatility and adaptability of the mechanism.

[0033] Multiple urethane limit blocks 112 are installed on the top surface of the mounting base plate 11. The urethane limit blocks 112 are used to limit the descent stroke of the lifting plate 12. The urethane limit blocks 112 are made of polyurethane elastomer material and correspond to the position where the lifting plate 12 is lowered.

[0034] An L-shaped frame 110 is bolted onto the mounting base 11. The L-shaped frame 110 has a right-angle bent structure, with its horizontal side fixed to the mounting base 11 by bolts and its vertical side extending upwards. A laser positioning sensor 19 for monitoring the movement position of the NG tray 10 for camera assembly is mounted on the surface of the L-shaped frame 110. The laser positioning sensor 19 is a through-beam or reflective photoelectric sensor used to monitor the movement position of the NG tray 10 for camera assembly. The laser positioning sensor 19 is fixed to the mounting base 11 via the L-shaped frame 110, with its transmitting end and receiving end positioned opposite each other on both sides of the movement path of the NG tray 10 for detecting whether the NG tray has been conveyed to the predetermined work position directly above the lifting plate 12.

[0035] In this invention, the laser positioning sensor 19 is fixed to the mounting base plate 11 by an L-shaped bracket 110. Its transmitting and receiving ends are positioned opposite each other on both sides of the moving path of the camera assembly NG tray 10. When the NG tray is conveyed along the assembly line towards the eccentric member 13, the detection beam of the laser positioning sensor 19 is either blocked or conducted by the tray, and the sensor outputs a corresponding detection signal to determine whether the NG tray has been conveyed to the predetermined position directly above the lifting plate 12. The positioning detection signal is transmitted to the equipment's control system, which controls the timing of the lifting cylinder 17 based on the signal to achieve automated lifting and positioning control.

[0036] In use, the main body 1 is first fixedly installed on the designated position of the automated equipment working platform by the mounting bracket 15 and bolts. Then, the camera assembly NG tray 10 is conveyed horizontally to the designated station of the eccentric part 13 above the lifting plate 12 via the assembly line. During the conveying process, the guide wear-resistant parts 14 set on both sides of the eccentric part 13 limit and guide the two side edges of the camera assembly NG tray 10 to ensure that the NG tray accurately enters the bearing range of the eccentric part 13 and realizes the initial positioning of the NG tray in the horizontal direction.

[0037] When the laser positioning sensor 19 detects that the NG tray has been delivered to the predetermined workstation, the control system controls the air inlet valve of the lifting cylinder 17 to open, supplying air to the lifting cylinder 17. The piston rod of the lifting cylinder 17 extends upward. Since the piston rod is fastened to the sinker 114 at the bottom of the lifting plate 12 through the connector 113, the extension of the piston rod pushes the lifting plate 12 to move upward in the vertical direction. During this process, the four guide shafts 111 fixed at the four corners of the lifting plate 12 slide and rise vertically in the sliding bearings 115 on the mounting base plate 11, forming an all-round guiding constraint on the lifting plate 12, ensuring that the lifting plate 12 always maintains a horizontal posture during the lifting process and does not tilt or sway.

[0038] As the lifting plate 12 rises, the lifting cylinder 17 is eccentrically mounted on the mounting base plate 11. During the lifting process, the forces on both sides of the lifting plate 12 are initially uneven. One side of the lifting cylinder 17 experiences an upward thrust, while the other side lacks upward driving force, generating an eccentric torque. This eccentric torque can easily cause the lifting plate 12 to tilt or jam. However, in this invention, two counterweights 18 are fixedly installed on the side of the lifting plate 12 opposite to the eccentric position of the lifting cylinder 17. The weight of the counterweights 18 generates a gravitational torque opposite to the eccentric torque through the lifting plate 12. This gravitational torque cancels out the eccentric torque generated by the eccentric lifting, achieving dynamic equilibrium of the forces on both sides of the lifting plate 12. The lifting process is smooth, noiseless, and without tilting.

[0039] Once the lifting plate 12 is in place, the lifting plate 12 carries the NG tray 10 for camera assembly and rises to the predetermined height. At this time, the robotic arm or gripping device on the automated equipment grips the camera module on the NG tray, or the laser engraving equipment performs laser scanning and other processes on the product.

[0040] After the process is completed, the control system controls the exhaust valve of the lifting cylinder 17 to open, the lifting cylinder 17 exhausts, and the piston rod retracts under its own weight and external load, driving the lifting plate 12 to descend. When the lifting plate 12 descends to the lowest position, the bottom of the lifting plate 12 contacts the urethane limit block 112 on the top surface of the mounting base plate 11, realizing the descent limit. At the same time, the elastic material of the urethane limit block 112 buffers the impact during the descent process and avoids rigid impact.

[0041] This completes one full work cycle of the invention. Subsequently, the completed NG pallet is conveyed by the assembly line to the next workstation, and the next NG pallet to be processed enters this mechanism, beginning the next work cycle.

[0042] Through a three-in-one technical solution of "eccentric lifting + counterweight balancing + four-axis guidance," this invention achieves automated lifting operations with high load (30kg horizontal load), long stroke (100mm lifting stroke), and high stability within a limited equipment space, completely replacing the traditional manual loading method. This invention effectively balances the eccentric torque generated by the eccentric lifting of the lifting cylinder 17, ensuring uniform force on both sides of the lifting plate during lifting, smooth operation, reduced product vibration, and improved positioning accuracy. While ensuring lifting stability, it significantly saves vertical space, facilitating equipment miniaturization and compact layout. It completely replaces manual handling, avoiding direct contact between personnel and products, ensuring a clean assembly environment, and overcoming the disadvantages of high labor intensity and low efficiency of manual handling, ultimately completing the application of the eccentric counterweight lifting mechanism.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An eccentric counterweight lifting mechanism, comprising a mechanism body (1), characterized in that: The mechanism body (1) includes a mounting base plate (11) and a lifting plate (12). The lifting plate (12) is disposed above the mounting base plate (11). An eccentric component (13) is mounted on the lifting plate (12). The mechanism body (1) also includes a lifting cylinder (17) fixedly mounted on the bottom of the mounting base plate (11). The piston rod of the lifting cylinder (17) passes upward through the mounting base plate (11) and is connected to the lifting plate (12) to drive the lifting plate (12) to reciprocate in the vertical direction. Two counterweights (18) are bolted to the other side of the lifting plate (12) relative to the eccentric position of the lifting cylinder (17). Multiple urethane limit blocks (112) are mounted on the top surface of the mounting base plate (11).

2. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The lifting plate (12) has a flat structure and its area is adapted to the NG tray (10) for assembling the camera to be supported. The lifting stroke of the lifting plate (12) is 100mm and the maximum lifting speed is 300mm / s.

3. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The mounting base (11) is mounted with a mounting bracket (15) by bolts. The mounting base (11) is fixedly mounted on the working platform of the automated equipment by the mounting bracket (15) and bolts.

4. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The mounting base plate (11) is equipped with a wiring terminal (16) by bolts, and the eccentric part (13) is provided with a camera assembly NG tray (10), which is used to support the camera assembly NG tray (10).

5. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The two sides of the eccentric component (13) are provided with guide wear-resistant components (14) for guiding the NG tray (10) for camera assembly to enter the predetermined position on the eccentric component (13) in a predetermined direction.

6. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: An L-shaped frame (110) is bolted onto the mounting base plate (11), and a laser positioning sensor (19) for monitoring the movement position of the NG tray (10) for camera assembly is mounted on the surface of the L-shaped frame (110).

7. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The piston rod end of the lifting cylinder (17) is provided with a connector (113), and the bottom of the lifting plate (12) is provided with a corresponding recess (114). The connector (113) is embedded in the recess (114) and fastened thereto, so as to realize the fixed connection between the lifting cylinder (17) and the lifting plate (12).

8. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The main body of the mechanism (1) also includes four guide shafts (111) and a corresponding number of sliding bearings (115). The four guide shafts (111) are respectively set at the four corners of the lifting plate (12). One end of each guide shaft (111) is fixedly connected to the bottom of the lifting plate (12), and the other end extends vertically downward and slides through the corresponding sliding bearing (115). The sliding bearing (115) is fixedly installed on the mounting base plate (11).

9. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The counterweight (18) is used to balance the eccentric load torque generated by the eccentric setting of the lifting cylinder (17), and the counterweight (18) and the lifting plate (12) are detachably connected.

10. The eccentric counterweight lifting mechanism according to claim 1, characterized in that: The urethane limit block (112) is used to limit the descent stroke of the lifting plate (12). The urethane limit block (112) is made of polyurethane elastomer material and corresponds to the position where the lifting plate (12) is lowered.

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