Four-cylinder synchronous hydraulic lifting mechanism

Abstract

This invention relates to a four-cylinder synchronous hydraulic lifting mechanism, comprising a base frame, a control panel on the left side surface of the base frame, a constant pressure pump station near the right end of the base frame, a first connecting oil pipe and a second connecting oil pipe arranged sequentially from top to bottom on the left side surface of the constant pressure pump station, a servo cylinder at the end of the first connecting oil pipe away from the constant pressure pump station, and a support block at the top of the servo cylinder; and a lifting platform mounted on the surface of the support block. This invention uses a second gear to drive a first gear in reverse, which in turn drives a first rack plate to rise. The first support plate and the first movable shaft move around the circumference of the connecting shaft, providing strong stability. Simultaneously, two sets of second rack plates and first rack plates provide auxiliary support for the second and first movable shafts, preventing the lifting platform from tilting during ascent and enhancing operational safety.

Description

Technical Field

[0001] This invention relates to the field of hydraulic lifting mechanism technology, specifically a four-cylinder synchronous hydraulic lifting mechanism. Background Technology

[0002] Hydraulic lifting platforms can be customized to meet specific user requirements. They are used for high-altitude operations and maintenance in factories, automated warehouses, parking lots, municipal works, docks, construction, decoration, logistics, power, transportation, petroleum, chemical, hotels, stadiums, mines, and other enterprises. The lifting system of these platforms is hydraulically driven, hence the name hydraulic lifting platform, and it can also utilize four cylinders for synchronized lifting.

[0003] For example, patent document CN217555722U discloses a four-cylinder synchronous hydraulic lifting platform, including a lifting platform with servo cylinders connected to its four corners. Each servo cylinder has a Z-shaped connector at its drive end and a positioning block at the other end of the Z-shaped connector. The positioning block engages with pre-drilled positioning slots at the four corners of the lifting platform for secure connection. A proportional valve is connected to one side of each servo cylinder and is connected to a controller. The servo cylinder is connected to a constant pressure pump station via connecting oil pipes. Both the proportional valve and the controller are located inside the constant pressure pump station. The positioning slots are located at the four corners of the lifting platform, with open bottoms, forming an overall U-shaped structure. The U-shaped positioning slots facilitate connection to the positioning blocks at the ends of the Z-shaped connectors and eliminate the need for additional locking under the weight of large equipment or parts. This allows the servo cylinders to lift and lower simultaneously under the control of the controller.

[0004] However, when the platform is raised and lowered by four hydraulic cylinders, the lifting is carried out by four sets of hydraulic cylinders. During the lifting process, the hydraulic cylinders use oil pressure to raise the platform. During the lifting process, the platform is prone to tilting and has poor stability. When the platform tilts at a small angle, the force on the hydraulic cylinders is uneven. At the same time, the products on the platform cannot be clamped adaptively when they are raised. Therefore, it is urgent to design a four-cylinder synchronous hydraulic lifting mechanism to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a four-cylinder synchronous hydraulic lifting mechanism to solve the problems mentioned in the background art, such as the platform being lifted by four sets of hydraulic cylinders, the platform being tilted and unstable during the lifting process due to the hydraulic cylinders using oil pressure, uneven force on the hydraulic cylinders when the platform is tilted at a small angle, and the inability to adaptively clamp the product on the platform during the lifting process.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: a four-cylinder synchronous hydraulic lifting mechanism, including a base frame, a control panel is provided on the left side surface of the base frame, a constant pressure pump station is provided near the right end of the base frame, a first connecting oil pipe and a second connecting oil pipe are arranged sequentially from top to bottom on the left side surface of the constant pressure pump station, a servo cylinder is provided at the end of the first connecting oil pipe away from the constant pressure pump station, a support block is provided at the top of the servo cylinder, four sets of servo cylinders are provided, and four sets of support blocks are provided for each set;

[0007] A lifting platform is mounted on the surface of a support block. From left to right, a first support plate and a second support plate are sequentially arranged on the bottom surface of the lifting platform. A first movable shaft is located at the bottom of the first support plate, and a second movable shaft is located at the bottom of the second support plate. A first connecting plate is located at the bottom of the first movable shaft, and a second connecting plate is located at the bottom of the first connecting plate. A telescopic rod is installed inside the second connecting plate and is connected to the bottom of the first connecting plate. A connecting shaft is located at the bottom of the second connecting plate, and support frames are provided at both ends of the connecting shaft. A first lifting plate is located on the bottom surface of the first movable shaft, and a rotating shaft is located at the top of the first lifting plate. A first rack plate is located at the right end of the first lifting plate, and a first gear is located on the right side surface of the first rack plate. A second gear is located on the right side surface of the first gear, and a second rack plate is meshed with the right side surface of the second gear.

[0008] Preferably, a limiting frame is provided on the surface of the second rack plate, the limiting frame is installed on the surface of the base frame, and a second lifting plate is provided on the right end surface of the second rack plate.

[0009] Preferably, a motion shaft is provided on the left side surface of the second gear, a turbine is provided at the left end of the motion shaft, a worm gear is provided on the outer surface of the turbine, and a servo motor is provided at the top end of the worm gear.

[0010] Preferably, an output shaft is fixedly connected to the back of the second gear, and a third gear is provided on the outer surface of the output shaft.

[0011] Preferably, the surface of the third gear is meshed with a third rack plate, the left end of the third rack plate is meshed with a fourth gear, and the interior of the fourth gear is provided with a bidirectional reciprocating lead screw.

[0012] Preferably, the surface of the bidirectional reciprocating lead screw is provided with a reciprocating sleeve, and two sets of the reciprocating sleeve are provided, with the two sets of reciprocating sleeves installed symmetrically to each other.

[0013] Preferably, a movable plate is fixedly connected to the top of the reciprocating sleeve, and a contact spring and an electric push rod are arranged sequentially from left to right on the left side surface of the movable plate.

[0014] Preferably, a compression plate is provided at the left end of the abutment spring, and two sets of compression plates and movable plates are provided, with the installation positions of the two sets of compression plates and movable plates being symmetrical to each other.

[0015] Preferably, there are two sets of the second gear, and both sets of the second gear are mounted on the surface of the output shaft.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This four-cylinder synchronous hydraulic lifting mechanism, through the configuration of servo cylinders, support blocks, lifting platforms, first support plates, second support plates, first movable shafts, second movable shafts, first connecting plates, second connecting plates, connecting shafts, support frames, first lifting plates, first rack plates, first gears, second gears, and second rack plates, operates as follows: First, the product is placed on the surface of the support block. Then, oil is supplied to the four sets of servo cylinders through the first and second connecting oil pipes, allowing the servo cylinders to slowly lift. During lifting, the servo motor drives the worm gear to rotate, which in turn drives the worm wheel to rotate. The worm wheel then drives the motion shaft and second gear to rotate. When the second gear rotates, it causes the second rack plate to slowly rise, thus driving the first... As the second lifting plate rises, it drives the second support plate to rise slowly. Since the first movable shaft is in contact with the bottom surface of the support block, the support block can be lifted smoothly. Similarly, the second gear drives the first gear to reverse, which in turn drives the first rack plate to rise. The first lifting plate drives the first movable shaft to rise, thus stabilizing the left end of the support block against the ground and enhancing stability during ascent. The first support plate and the first movable shaft move around the circumference of the connecting shaft, providing strong stability. At the same time, the two sets of second rack plates and first rack plates provide auxiliary support for the second and first movable shafts, preventing the lifting platform from tilting during ascent, enhancing safety during operation and demonstrating the functionality of the design.

[0018] This four-cylinder synchronous hydraulic lifting mechanism, through its set motion shaft, output shaft, third gear, third rack plate, fourth gear, bidirectional reciprocating screw, reciprocating sleeve, movable plate, contact spring, electric push rod, and pressing plate, operates by moving the second rack plate via the second gear. The second gear then drives the third gear to rotate, which in turn drives the third rack plate upwards. The rising third rack plate then drives the fourth gear to rotate, which in turn drives the bidirectional reciprocating screw. This, in turn, causes the two sets of reciprocating sleeves on the surface of the bidirectional reciprocating screw to move in opposite directions. When an object is placed... After the object is positioned on the lifting platform, it comes into contact with the pressing plates on both sides. Then, through the movement of two sets of reciprocating sleeves, the movable plate moves forward, thereby pressing the pressing plates through the electric push rod. The movement direction of the electric push rod is positioned by two sets of contact springs, which can stably hold the object in contact, ensuring that the object can be clamped adaptively and guaranteeing the clamping effect. After the object is clamped, the third rack plate can be manually removed, so that the fourth gear does not contact the third rack plate, resulting in a relatively stable fastening effect. This demonstrates the ingenuity of the design and solves the problem of objects not being clamped during the lifting process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of the structure of the first support plate and the second support plate of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the structure of the first and second rack plates of the present invention;

[0022] Figure 4 This is a schematic diagram showing the disassembled structure of the first and second rack plates of the present invention;

[0023] Figure 5 This is a schematic diagram showing the disassembled structure of the bidirectional reciprocating lead screw, the third rack plate, and the movable plate of the present invention.

[0024] Figure 6 This is a three-dimensional schematic diagram of the lifting platform and movable plate structure of the present invention;

[0025] Figure 7 For the present invention Figure 1 A schematic diagram showing the breakdown of the structure.

[0026] In the diagram: 1. Base frame; 2. Control panel; 3. Constant pressure pump station; 4. First connecting oil pipe; 5. Second connecting oil pipe; 6. Servo cylinder; 7. Support block; 8. Lifting platform; 9. First support plate; 10. Second support plate; 11. First movable shaft; 12. Second movable shaft; 13. First connecting plate; 14. Second connecting plate; 15. Connecting shaft; 16. Support frame; 17. First lifting plate; 18. First rack plate; 19. First gear; 20. Second gear; 21. Second rack plate; 22. Limiting frame; 23. Second lifting plate; 24. Motion shaft; 25. Turbine; 26. Worm gear; 27. Servo motor; 28. Output shaft; 29. ​​Third gear; 30. Third rack plate; 31. Fourth gear; 32. Bidirectional reciprocating screw; 33. Reciprocating sleeve; 34. Movable plate; 35. Contact spring; 36. Electric push rod; 37. Extrusion plate. Detailed Implementation

[0027] 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, and not all embodiments. 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.

[0028] Please see Figure 1-7 This invention provides an embodiment of a four-cylinder synchronous hydraulic lifting mechanism. The control panel 2, constant pressure pump station 3, servo cylinder 6, servo motor 27, bidirectional reciprocating screw 32, and electric push rod 36 used in this application are products that can be directly purchased on the market. Their principles and connection methods are existing technologies well known to those skilled in the art. The mechanism includes a base frame 1, a control panel 2 on the left side surface of the base frame 1, a constant pressure pump station 3 near the right end of the base frame 1, a first connecting oil pipe 4 and a second connecting oil pipe 5 arranged sequentially from top to bottom on the left side surface of the constant pressure pump station 3, a servo cylinder 6 at the end of the first connecting oil pipe 4 away from the constant pressure pump station 3, a support block 7 at the top of the servo cylinder 6, four sets of servo cylinders 6, and four sets of support blocks 7.

[0029] A lifting platform 8 is mounted on the surface of the support block 7. From left to right, a first support plate 9 and a second support plate 10 are sequentially arranged on the bottom surface of the lifting platform 8. A first movable shaft 11 is located at the bottom of the first support plate 9, and a second movable shaft 12 is located at the bottom of the second support plate 10. A first connecting plate 13 is located at the bottom of the first movable shaft 11, and a second connecting plate 14 is located at the bottom of the first connecting plate 13. A telescopic rod is installed inside the second connecting plate 14, and the telescopic rod is connected to the bottom of the first connecting plate 13. A connecting shaft 15 is located at the bottom of the second connecting plate 14, and support frames 16 are provided at both ends of the connecting shaft 15. A first lifting plate 17 is located on the bottom surface of the first movable shaft 11, and a top end of the first lifting plate 17 is provided with… A rotating shaft is provided. A first rack plate 18 is provided at the right end of the first lifting plate 17. A first gear 19 is provided on the right side surface of the first rack plate 18. A second gear 20 is provided on the right side surface of the first gear 19. There are two sets of second gears 20, both of which are mounted on the surface of the output shaft 28. The back of the second gear 20 is fixedly connected to the output shaft 28. A third gear 29 is provided on the outer surface of the output shaft 28. A third rack plate 30 is meshed with the surface of the third gear 29. A fourth gear 31 is meshed with the left end of the third rack plate 30. A bidirectional reciprocating screw 32 is provided inside the fourth gear 31. A reciprocating sleeve 33 is provided on the surface of the bidirectional reciprocating screw 32. A movable plate 34 is fixedly connected to the top of the reciprocating sleeve 33. From left to right, the left side surface of the movable plate 34 is provided with a contact spring 35 and an electric push rod 36. A pressing plate 37 is provided at the left end of the contact spring 35. Two sets of pressing plates 37 and two sets of movable plates 34 are provided, with their installation positions symmetrical. Two sets of reciprocating sleeves 33 are also provided, with their installation positions symmetrical. The left side surface of the second gear 20 is provided with a motion shaft 24. A worm gear 25 is provided at the left end of the motion shaft 24. A worm 26 is provided on the outer surface of the worm gear 25. A servo motor 27 is provided at the top of the worm 26. The right side surface of the second gear 20 is meshed with a second rack plate 21. A limit frame 22 is provided on the surface of the second rack plate 21 and is mounted on the surface of the base frame 1. A second lifting plate 23 is provided on the right end surface of the second rack plate 21. By placing the product on the surface of the support block 7, and then filling the four sets of servo cylinders 6 with oil through the first connecting oil pipe 4 and the second connecting oil pipe 5, the servo cylinders 6 can be slowly lifted. During lifting, the servo motor 27 drives the worm gear 26 to rotate, which in turn drives the turbine 25 to rotate. The turbine 25 then drives the motion shaft 24 and the second gear 20 to rotate. When the second gear 20 rotates, it drives the second rack plate 21 to rise slowly, which in turn drives the second lifting plate 23 to rise. The second lifting plate 23 then drives the second support plate 10 to rise slowly. Since the first movable shaft 11 is in contact with the bottom surface of the support block 7,This allows the support block 7 to be lifted smoothly. Similarly, the second gear 20 drives the first gear 19 to reverse, which in turn drives the first rack plate 18 to rise. The first lifting plate 17 drives the first movable shaft 11 to rise, thus stabilizing the left end of the support block 7 against the ground and enhancing stability during ascent. The first support plate 9 and the first movable shaft 11 move around the circumference of the connecting shaft 15, providing strong stability. At the same time, the two sets of second rack plates 21 and first rack plates 18 provide auxiliary support for the second movable shaft 12 and the first movable shaft 11, preventing the lifting platform 8 from tilting during ascent and enhancing safety during operation. As the second gear 20 drives the second rack plate 21 to move, the second gear 20 drives the third gear 29 to rotate, which in turn drives the third rack plate 30 to move upward. After the third rack plate 30 rises, it drives the fourth gear 31 to rotate. This rotation of the fourth gear 31, in turn, causes the bidirectional reciprocating screw 32 to rotate, which in turn drives the two sets of reciprocating sleeves 33 on the surface of the screw to move in opposite directions. When the object is placed on the surface of the lifting platform 8, it abuts against the pressing plates 37 on both sides. The movement of the two sets of reciprocating sleeves 33 then moves the movable plate 34 forward, allowing the electric push rod 36 to press against the pressing plates 37. Two sets of contact springs 35 position the electric push rod 36, ensuring stable contact with the object and guaranteeing a secure clamping effect. After clamping, the third rack plate 30 can be manually removed, preventing contact between the fourth gear 31 and the third rack plate 30. This stable clamping effect demonstrates the ingenuity of the design.

[0030] Working principle: During use, the user places the product on the surface of the support block 7, and then fills the four sets of servo cylinders 6 with oil through the first connecting oil pipe 4 and the second connecting oil pipe 5. This allows the servo cylinders 6 to slowly lift. During lifting, the servo motor 27 drives the worm gear 26 to rotate, which in turn drives the turbine 25 to rotate. The turbine 25 then drives the motion shaft 24 and the second gear 20 to rotate. When the second gear 20 rotates, it causes the second rack plate 21 to slowly rise, which in turn causes the second lifting plate 23 to rise. The second lifting plate 23 then drives the second support plate 1... The support block 7 rises slowly. Because the first movable shaft 11 is in contact with the bottom surface of the support block 7, the support block 7 can be lifted smoothly. Similarly, the second gear 20 drives the first gear 19 to reverse, which in turn drives the first rack plate 18 to rise. The first lifting plate 17 drives the first movable shaft 11 to rise, thus stabilizing the left end of the support block 7 against the ground, enhancing stability during ascent. The first support plate 9 and the first movable shaft 11 move around the circumference of the connecting shaft 15, providing strong stability. Simultaneously, the two sets of second rack plates 21 and first rack plates 18 engage the second movable shaft 12 and... The first movable shaft 11 provides auxiliary support, preventing the lifting platform 8 from tilting during ascent and enhancing operational safety. As the second gear 20 drives the second rack plate 21, it in turn drives the third gear 29 to rotate. This, in turn, causes the third rack plate 30 to move upwards. The rising rack plate 30 then drives the fourth gear 31 to rotate, which in turn rotates the bidirectional reciprocating screw 32. This rotation causes the two sets of reciprocating sleeves 33 on the surface of the bidirectional reciprocating screw 32 to move in opposite directions. When an object is placed on the lifting platform 8... After the surface is cleaned, the object will come into contact with the pressing plates 37 on both sides. Then, through the movement of the two sets of reciprocating sleeves 33, the movable plate 34 will move forward, so that the electric push rod 36 can press the pressing plate 37. The movement direction of the electric push rod 36 is positioned by the two sets of contact springs 35, so that the object can be stably pressed, ensuring that the object can be clamped adaptively, ensuring the clamping effect. After the object is clamped, the third rack plate 30 can be manually removed, so that the fourth gear 31 does not contact the third rack plate 30, and the fastening effect is relatively stable. The above is the entire working principle of the present invention.

[0031] 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. A four-cylinder synchronous hydraulic lifting mechanism, comprising a base frame (1), a control panel (2) being provided on the left side surface of the base frame (1), a constant pressure pump station (3) being provided near the right end of the base frame (1), a first connecting oil pipe (4) and a second connecting oil pipe (5) being provided sequentially from top to bottom on the left side surface of the constant pressure pump station (3), a servo cylinder (6) being provided at the end of the first connecting oil pipe (4) away from the constant pressure pump station (3), and a support block (7) being provided at the top of the servo cylinder (6), characterized in that: The servo cylinder (6) is provided in four sets, and the support block (7) is provided in four sets; A lifting platform (8) is mounted on the surface of a support block (7). From left to right, a first support plate (9) and a second support plate (10) are sequentially arranged on the bottom surface of the lifting platform (8). A first movable shaft (11) is provided at the bottom of the first support plate (9), and a second movable shaft (12) is provided at the bottom of the second support plate (10). A first connecting plate (13) is provided at the bottom of the first movable shaft (11), and a second connecting plate (14) is provided at the bottom of the first connecting plate (13). A telescopic rod is provided inside the second connecting plate (14), and the telescopic rod is connected to the bottom of the first connecting plate (13). The second connecting plate (14) is provided with a connecting shaft (15) at its bottom end. Both ends of the connecting shaft (15) are provided with support frames (16). The bottom surface of the first movable shaft (11) is provided with a first lifting plate (17). The top end of the first lifting plate (17) is provided with a rotating shaft. The right end of the first lifting plate (17) is provided with a first rack plate (18). The right side surface of the first rack plate (18) is provided with a first gear (19). The right side surface of the first gear (19) is provided with a second gear (20). The right side surface of the second gear (20) is meshed with a second rack plate (21). The left side surface of the second gear (20) is provided with a motion shaft (24), the left end of the motion shaft (24) is provided with a turbine (25), the outer surface of the turbine (25) is provided with a worm (26), and the top end of the worm (26) is provided with a servo motor (27). The back of the second gear (20) is fixedly connected to an output shaft (28), and a third gear (29) is provided on the outer surface of the output shaft (28); The surface of the third gear (29) is meshed with a third rack plate (30), and the left end of the third rack plate (30) is meshed with a fourth gear (31). The interior of the fourth gear (31) is provided with a bidirectional reciprocating screw (32). The surface of the bidirectional reciprocating lead screw (32) is provided with a reciprocating sleeve (33), and there are two sets of the reciprocating sleeve (33), with the two sets of reciprocating sleeves (33) installed symmetrically to each other; The top of the reciprocating sleeve (33) is fixedly connected to a movable plate (34), and the left side surface of the movable plate (34) is provided with a contact spring (35) and an electric push rod (36) from left to right. The left end of the resisting spring (35) is provided with a compression plate (37). Both the compression plate (37) and the movable plate (34) are provided in two sets, and the installation positions of the two sets of compression plates (37) and movable plates (34) are symmetrical to each other.

2. The four-cylinder synchronous hydraulic lifting mechanism according to claim 1, characterized in that: A limit frame (22) is provided on the surface of the second rack plate (21), and the limit frame (22) is installed on the surface of the base frame (1). A second lifting plate (23) is provided on the right end surface of the second rack plate (21).

3. The four-cylinder synchronous hydraulic lifting mechanism according to claim 1, characterized in that: The second gear (20) is provided in two sets, and both sets of the second gear (20) are mounted on the surface of the output shaft (28).

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