Multi-cylinder servo-synchronous hydraulic device

Abstract

The present application relates to the technical field of hydraulic cylinder, and specifically discloses a multi-cylinder servo synchronous hydraulic device, which comprises a main body structure, an adapter structure and a driving motor; the adapter structure is detachably arranged on the main body structure, the driving motor is detachably arranged on the adapter structure, and the driving motor is fixed through first bolts; the main body structure can be transversely relatively spliced and fixed through second bolts; when the main body structure is transversely spliced, the adapter structure can be relatively inserted and connected, and the adapter structure is synchronously driven by the driving motor; through driving mode innovation, modular splicing and structure optimization, the present application realizes the technical breakthroughs of diversified driving, low-cost expansion and high-precision synchronization, significantly improves the practicability and economy of the hydraulic cylinder, and has wide industrial application value.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, in particular to a multi-cylinder servo synchronous hydraulic device. Background Art

[0002] The existing hydraulic cylinders are pump-type hydraulic cylinders and servo hydraulic cylinders. The pump-type hydraulic cylinder uses a hydraulic pump (such as a gear pump or a plunger pump) to provide a constant flow and pressure to the oil in the oil tank, and a control valve (such as a directional valve or a flow valve) adjusts the movement of the hydraulic cylinder. The continuous operation of the pump consumes a lot of energy, and the telescopic response is slow and not suitable for high-frequency dynamic control; the servo hydraulic cylinder uses a servo motor to drive a fixed-displacement pump or is directly equipped with a servo valve, and achieves high-precision motion control and fast response through closed-loop feedback; however, the existing servo hydraulic cylinder can only be operated and used by a single cylinder. If a large bearing support force is required, multiple single hydraulic cylinders need to be installed, and synchronous drive is relatively cumbersome. In addition, due to the appearance and structure of the existing servo hydraulic cylinders, it is difficult to achieve parallel combination, which increases the cost. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a multi-cylinder servo synchronous hydraulic device, which solves the problems in the above-mentioned background technology.

[0004] In order to solve the above-mentioned problems, the present invention provides the following technical solutions: a multi-cylinder servo synchronous hydraulic device, comprising a main structure, a transfer structure and a drive motor; the transfer structure can be detachably mounted on the main structure, the drive motor can be detachably mounted on the transfer structure, and the drive motor is fixed by a first bolt; the main structure can be horizontally spliced ​​relative to each other and fixed by a second bolt; when the main structure is horizontally spliced, the transfer structure can be relatively plugged in and connected, and the transfer structure is synchronously driven by the drive motor; the main structure is used for hydraulic extension and contraction, the transfer structure controls the main structure by the drive motor, and the main structure can also be driven and controlled by an oil pump.

[0005] Preferably, the main structure includes a main body component and a lifting component; the lifting component is movably arranged in the main body component.

[0006] Preferably, the main assembly includes a cylinder body, a first bearing, a base, a sealing cover and an oil tank; the cylinder body is rectangular, and a circular inner cavity is provided in the middle of the upper wall of the cylinder body, and the front and rear side walls of the cylinder inner cavity are symmetrically provided with limit grooves, and the height of the limit grooves is less than the height of the cylinder inner cavity, and the left and right side walls of the cylinder body are symmetrically provided with a pair of adapter grooves, and the lower wall of the cylinder body is provided with a trapezoidal mounting groove connected to the left and right side walls, and the left side wall of the cylinder body is provided with an oil delivery port near the upper and lower ends of the inner cavity, the first bearing is fixedly embedded in the middle of the lower wall of the cylinder body, and the first bearing is connected to the inner cavity, the base is rectangular, and the upper wall of the base is provided with sockets that fit the mounting groove near the front and rear ends, and the base can be detachably mounted on the bottom of the cylinder body, and the socket is inserted into the mounting groove A compensation hole corresponding to the middle of the first bearing is opened in the middle of the upper wall of the base, and the socket on the base is screwed to the front and rear side walls of the cylinder body and tightened and fixed by the second bolt. The sealing cover is detachably buckled on the upper wall of the cylinder body, and the sealing cover is fixed by a number of third bolts. The oil tank is a rectangular box body, and the right side wall of the oil tank is provided with oil pipes corresponding to the oil delivery port near the upper and lower ends. The left and right side walls of the oil tank are both provided with adapter arms corresponding to the adapter groove. The oil tank is detachably placed on the left side wall of the cylinder body, and the oil pipe is movably inserted in the oil delivery port. The oil tank is sealed and fitted with the left side wall of the cylinder body, and the adapter arm of the right side wall of the oil tank is inserted in the adapter groove of the left side wall of the cylinder body. The adapter arm is screwed to the adapter groove position and fixed by a number of second bolts, and the second bolt passes through the adapter arm.

[0007] Preferably, the lifting assembly includes a driving rod and a telescopic arm; one end of the driving rod is detachable and passes through the middle of the first bearing, and one end of the driving rod can be inserted into the compensation hole of the upper wall of the base, and the side wall of one end of the driving rod is provided with an arc-shaped first docking interface, and the middle of the right side wall of the first docking interface is provided with a rectangular force-applying hole, the other end of the driving rod is located in the middle of the inner cavity of the cylinder body, the front and rear side walls of one end of the telescopic arm are provided with a limit block that fits in the limit groove, and a spiral hole is provided in the middle of the lower wall of one end of the telescopic arm, one end of the telescopic arm is movably inserted in the inner cavity of the cylinder body, and one end of the telescopic arm is located between the oil delivery ports, the limit block at one end of the telescopic arm is movably embedded in the limit groove, and one end of the telescopic arm fits with the inner wall of the cylinder, the other end of the telescopic arm movably passes through the middle of the sealing cover, one end of the telescopic arm is movably sleeved on the other end of the driving rod, and the telescopic arm is screwed to the driving rod through the spiral hole.

[0008] Preferably, the telescopic arm is a T-shaped round rod structure, and the diameter of one end of the telescopic arm is larger than the other end.

[0009] Preferably, the transfer structure includes a transfer box, a second bearing, a pair of third bearings, a transmission shaft, a docking shaft and a pair of bevel gears; sockets are symmetrically provided on the upper wall of the transfer box, the transfer box is detachably placed on the bottom of the cylinder body, and the transfer box is connected to the cylinder body through the socket, a groove corresponding to the first bearing is opened in the middle of the upper wall of the transfer box, the second bearing is fixedly embedded in the middle of the groove, a pair of the third bearings are symmetrically embedded in the middle of the left and right side walls of the transfer box respectively, and the left end of the transmission shaft is fixedly inserted into the third bearing on the left side wall of the transfer box The right end of the transmission shaft is fixed through the middle of the third bearing on the right side wall of the adapter box, the middle of the left end of the transmission shaft is set in the torque hole, the right end of the transmission shaft is matched with the torque hole, one end of the docking shaft is movably embedded in the groove, and the other end of the docking shaft is fixed through the middle of the second bearing, one end of the docking shaft is provided with a second docking interface that matches the first docking interface, and the second docking interface is provided with a force rod that matches the force application port, a pair of bevel gears are fixedly mounted on the other end of the docking shaft and the transmission shaft, and the two bevel gears are relatively engaged.

[0010] Preferably, one end of the docking shaft can be plugged into the first docking interface of the driving rod through the second docking interface, and the force applying rod is inserted into the force applying interface.

[0011] Preferably, the drive motor is detachably mounted in the middle of the left side wall of the adapter box, and the drive end of the drive motor is inserted into the left end of the transmission shaft, and the drive end of the drive motor fits in the torque hole.

[0012] Preferably, when the adapter structures are relatively connected, the right end of one transmission shaft is inserted into the torque hole of the left end of the other transmission shaft.

[0013] Preferably, the oil delivery port of the cylinder body is detachably connected to a screw-on connecting pipe for connecting to an oil supply pump drive.

[0014] The multi-cylinder servo synchronous hydraulic device proposed in this invention has the following beneficial effects: through the modular main component design, it realizes diversified driving modes of the hydraulic cylinder (oil pump drive or motor drive), supports multi-cylinder assembly and synchronous control, and combines the spiral lifting mechanism with hydraulic compensation power assistance, which has the following significant advantages:

[0015] 1. Dual-mode drive: Oil pump drive mode connects external oil pump (such as gear pump, plunger pump) through oil delivery port, uses high force density characteristics of hydraulic system, is suitable for large load, high power scene such as engineering machinery, heavy equipment, is compatible with existing hydraulic system, does not need to be greatly modified, reduces equipment upgrading cost. Motor drive mode adopts servo drive motor and screw transmission structure (driving rod and telescopic arm rotation joint), realizes high-precision position control and rapid dynamic response, meets the precise control demand of precision machinery, high-frequency reciprocating motion and other scenes; two modes are switched through detachable adapter structure, without replacing core components, significantly improving the versatility of the device, reducing the dependence on single energy.

[0016] 2. The main body structure is transversely spliced through the adapter slots of the left and right side walls, the adapter arms and the second bolts, the oil tank and the cylinder body are detachably connected, forming a parallel multi-cylinder combination, the transmission shaft of the adapter structure can be inserted and connected, and a single drive motor can synchronously drive multiple cylinder bodies, without the need to independently configure a drive unit for each hydraulic cylinder, thereby greatly reducing hardware cost and system complexity, and being suitable for equipment requiring multiple cylinder cooperation, such as four-column presses and lifting platforms. By quickly splicing, the system scale can be expanded, and the equipment assembly flexibility can be improved.

[0017] 3. The tapered gear transmission of the adapter structure is rigidly connected with the transmission shaft, ensuring the synchronization of multiple cylinder movements; the limiting block of the telescopic arm cooperates with the limiting groove in the inner wall of the cylinder body to avoid radial deviation and improve movement accuracy. The hydraulic oil circulates in the closed loop of the oil tank and the inner cavity of the cylinder body, which assists in load bearing through oil pressure, reduces the load of the drive motor, and enhances the stability of the system.

[0018] 4. The drive motor, adapter structure, base and sealing cover are fixed by bolts, which facilitates quick disassembly and maintenance. For example, when switching the drive mode, only the base or adapter box needs to be disassembled, without the need to disassemble the entire system, thereby improving maintenance efficiency. The first bearing cooperates with the compensation hole of the base, and the driving rod penetration is designed with a sealing structure to ensure the airtightness of the hydraulic oil in the cylinder cavity and prevent leakage. The sealing treatment of the bonding surface of the oil tank and the cylinder body ensures the reliability of the hydraulic system.

[0019] 5. By sharing the drive motor and hydraulic oil circuit, the number of components such as motors, oil pumps, control valves, etc. in the multi-cylinder system is reduced, the manufacturing and operation and maintenance costs are reduced, and the compact modular structure saves installation space, which is especially suitable for space-limited scenarios.

[0020] In summary, the present application realizes the technical breakthroughs of diversified driving, low-cost expansion and high-precision synchronization through drive mode innovation, modular splicing and structure optimization, significantly improves the practicality and economy of the hydraulic cylinder, and has wide industrial application value. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The assembly structure of the present application is shown in the figure;

[0022] Figure 2 This is a schematic diagram of the split structure of the main structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the split structure of the switching structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the main structure assembly structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the assembly structure of the transfer structure of the present invention;

[0026] Figure 6 This is a schematic diagram showing the assembly structure of the connecting pipe and the cylinder body of the present invention;

[0027] Figure 7 It is a schematic diagram of the assembly structure of the main structure and the transition structure of the present invention;

[0028] Figure 8 This is an enlarged structural diagram showing the connection between the driving rod and the docking shaft of the present invention;

[0029] Figure 9 It is a schematic diagram showing the structure of the force application port of the present invention in an enlarged manner.

[0030] In the figure: 1. Main assembly; 11. Cylinder body; 12. First bearing; 13. Base; 14. Sealing cover; 15. Oil tank; 2. Lifting assembly; 21. Drive rod; 22. Telescopic arm; 3. Transfer structure; 31. Transfer box; 32. Second bearing; 33. Third bearing; 34. Transmission shaft; 35. Docking shaft; 36. Bevel gear; 4. Drive motor; 5. Connecting pipe; 61. First bolt; 62. Second bolt; 63. Third bolt; 71. Limiting groove; 72. Transfer groove; 73. Mounting groove; 74. Oil delivery port; 75. Transfer arm; 81. Compensating hole; 82. First interface; 83. Force application port; 84. Limiting block; 91. Second interface; 92. Force application rod; 93. Groove; 94. Torque hole; 10. Socket. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1-9 A detailed description of the specific implementation of the present invention is given below.

[0032] like Figure 1 、 Figure 6 and Figure 7As shown in the figure, the present application provides a technical solution: a multi-cylinder servo synchronous hydraulic device, comprising a main structure, a switching structure 3 and a driving motor 4; the switching structure 3 is detachably arranged on the main structure, the driving motor 4 is detachably arranged on the switching structure 3, and the driving motor 4 is fixed by the first bolt 61; the main structure can be transversely relative spliced and fixed by the second bolt 62; when the main structure is transversely spliced, the switching structure 3 can be connected by relative insertion, and the switching structure 3 is synchronously driven by the driving motor 4; the main structure is used for hydraulic expansion and contraction, the switching structure 3 controls the main structure by the driving motor 4, and the main structure can also be driven and controlled by an oil pump.

[0033] As a further scheme of the present application, as Figure 1 As shown in the figure, the main structure comprises a main assembly 1 and a lifting assembly 2; the lifting assembly 2 is movably arranged in the main assembly 1.

[0034] More specifically, as Figure 2 And Figure 4As shown, the main body assembly 1 comprises a cylinder body 11, a first bearing 12, a base 13, a sealing cover 14 and an oil tank 15; the cylinder body 11 is rectangular, a circular inner cavity is formed in the middle of the upper wall of the cylinder body 11, limit grooves 71 are symmetrically formed in the front and rear side walls of the inner cavity of the cylinder body 11, the height of the limit grooves 71 is less than the height of the inner cavity of the cylinder body 11, a pair of adapter grooves 72 are symmetrically formed in the left and right side walls of the cylinder body 11, a trapezoidal mounting groove 73 is formed in the lower wall of the cylinder body 11 and communicates with the left and right side walls, oil feeding ports 74 are arranged on the left side wall of the cylinder body 11 near the upper and lower ends of the inner cavity; the oil feeding ports 74 of the cylinder body 11 are detachably connected with a connecting pipe 5 through screwing, which is used for connecting with an oil pump drive, the first bearing 12 is fixedly embedded in the middle of the lower wall of the cylinder body 11 and communicates with the inner cavity; the base 13 is rectangular, sockets 10 that are matched with the mounting groove 73 are arranged on the upper wall of the base 13 near the front and rear ends, the base 13 is detachably mounted on the bottom of the cylinder body 11, the sockets 10 are inserted into the mounting groove 73, a compensation hole 81 corresponding to the middle of the first bearing 12 is formed in the middle of the upper wall of the base 13, the sockets 10 on the base 13 are fixedly screwed on the top of the front and rear side walls of the cylinder body 11 through second bolts 62; the sealing cover 14 is detachably buckled on the upper wall of the cylinder body 11 and is fixed through a plurality of third bolts 63; the oil tank 15 is a rectangular box, oil pipes corresponding to the oil feeding ports 74 are arranged on the right side wall of the oil tank 15 near the upper and lower ends, adapter arms 75 corresponding to the adapter grooves 72 are arranged on the left and right side walls of the oil tank 15, the oil tank 15 is detachably arranged on the left side wall of the cylinder body 11, the oil pipes are movably inserted into the oil feeding ports 74, the oil tank 15 is sealingly attached to the left side wall of the cylinder body 11, and the adapter arms 75 of the right side wall of the oil tank 15 are inserted into the adapter grooves 72 of the left side wall of the cylinder body 11; the adapter arms 75 are fixedly screwed on the adapter groove 72 positions through a plurality of second bolts 62 and the second bolts 62 penetrate the adapter arms 75; the oil tank 15 is connected with the inner cavity of the cylinder body through the oil feeding ports 74, when the telescopic arm 22 is lifted, the hydraulic oil in the upper and lower layers thereof is supplemented or returned through the oil tank 15, so that the system pressure is kept stable, the sockets 10 of the base 13 and the adapter arms 75 of the oil tank 15 are designed in a standardized manner, which supports rapid disassembly and assembly and transverse splicing, cooperates with the plug-in connection of the transmission shaft of the adapter structure 3, realizes single-motor-driven multi-cylinder synchronous movement, the sealing design of the first bearing 12, the sealing cover 14 and the attached surface of the oil tank 15 ensures that the hydraulic system has no leakage, the cooperation of the limit grooves 71 and the limit blocks 84 prevents the telescopic arm 22 from shaking radially and improves the movement accuracy.

[0035] As a further scheme of the present application, Figure 2 , Figure 4 and Figure 9As shown, the lifting assembly 2 comprises a driving rod 21 and a telescopic arm 22; one end of the driving rod 21 is detachably penetrated through the middle part of the first bearing 12, and the one end of the driving rod 21 can be inserted into the compensation hole 81 in the upper wall of the base 13, the side wall of the one end of the driving rod 21 is provided with an arc-shaped first connecting interface 82, and the right side wall of the first connecting interface 82 is provided with a rectangular force applying hole in the middle part, the other end of the driving rod 21 is located in the middle part of the inner cavity of the cylinder body 11, the telescopic arm 22 is a T-shaped circular rod structure, and the diameter of one end of the telescopic arm 22 is larger than that of the other end, the front and rear side walls of the one end of the telescopic arm 22 are provided with limiting blocks 84 matched with the limiting grooves 71, and the middle part of the lower wall of the one end of the telescopic arm 22 is provided with a spiral hole, the one end of the telescopic arm 22 is movably inserted into the inner cavity of the cylinder body 11, and the one end of the telescopic arm 22 is located between the oil feeding ports 74, the limiting block 84 of the one end of the telescopic arm 22 is movably embedded in the limiting groove 71, and the one end of the telescopic arm 22 is matched with the inner wall of the cylinder body 11, the other end of the telescopic arm 22 movably penetrates through the middle part of the sealing cover 14, the one end of the telescopic arm 22 movably sleeves the other end of the driving rod 21, and the telescopic arm 22 is screwed with the driving rod 21 through the spiral hole; the driving motor 4 drives the connecting shaft 35 to rotate through the transmission shaft 34 and the bevel gear 36 of the adapter structure 3, the force applying rod 92 of the connecting shaft 35 is inserted into the force applying hole of the driving rod 21, and the driving rod 21 is driven to rotate around the first bearing 12; the spiral hole of the telescopic arm 22 is matched with the external thread of the driving rod 21, under the constraint of the limiting block 84, the rotary motion is converted into the linear motion upward or downward, and the precise telescopic control is realized; the adapter structure 3 is removed, the external oil pump is connected through the oil feeding port 74, the hydraulic oil enters the upper and lower cavities of the telescopic arm 22, and the telescopic arm 22 is driven to lift by the pressure difference; at this time, the driving rod 21 moves synchronously with the telescopic arm 22, the bottom end is separated from the compensation hole 81 of the base 13, and the bottom of the cylinder body 11 is sealed by the base 13; the cooperation precision of the limiting block 84 and the limiting groove 71 ensures the linear motion degree of the telescopic arm 22, and reduces the influence of the radial load on the driving rod 21; the gap sealing between the through hole of the sealing cover 14 and the small diameter end of the telescopic arm 22, combined with the oil seal design of the first bearing 12, prevents the hydraulic oil from leaking.

[0036] As a further scheme of the present application, Figure 3 , Figure 5 and Figure 8As shown, the adapter structure 3 includes an adapter box 31, a second bearing 32, a pair of third bearings 33, a transmission shaft 34, a butt joint shaft 35, and a pair of bevel gears 36; the adapter box 31 is symmetrically provided with the socket 10 on the upper wall, and is detachably arranged at the bottom of the cylinder body 11, and is connected with the cylinder body 11 through the socket 10; a recess 93 corresponding to the first bearing 12 is formed in the middle of the upper wall of the adapter box 31; the second bearing 32 is fixedly embedded in the middle of the recess 93; the pair of third bearings 33 are respectively symmetrically embedded in the middle of the left and right side walls of the adapter box 31; the left end of the transmission shaft 34 is fixedly inserted into the middle of the third bearing 33 of the left side wall of the adapter box 31, the right end of the transmission shaft 34 is fixedly inserted through the middle of the third bearing 33 of the right side wall of the adapter box 31, the left end of the transmission shaft 34 is arranged in the torsion hole 94, and the right end of the transmission shaft 34 is matched with the torsion hole 94; one end of the butt joint shaft 35 is movably embedded in the recess 93, and the other end of the butt joint shaft 35 is fixedly inserted through the middle of the second bearing 32; the one end of the butt joint shaft 35 is provided with the second butt joint 91 matched with the first butt joint 82, and the second butt joint 91 is provided with the force applying rod 92 matched with the force applying port 83; the one end of the butt joint shaft 35 can be inserted with the first butt joint 82 of the driving rod 21 through the second butt joint 91, and the force applying rod 92 is inserted into the force applying port 83; the pair of bevel gears 36 are respectively fixedly sleeved on the other end of the butt joint shaft 35 and the transmission shaft 34, and the two bevel gears 36 are relatively engaged; when the adapter structure 3 is connected, the right end of one of the transmission shafts 34 is inserted into the torsion hole 94 of the left end of the other transmission shaft 34, the driving motor 4 is detachably arranged in the middle of the left side wall of the adapter box 31, and the driving end of the driving motor 4 is inserted into the left end of the transmission shaft 34, and the driving end of the driving motor 4 is matched with the torsion hole 94; in the motor driving mode, the driving motor 4 is started, the driving end of the driving motor 4 transmits power to the transmission shaft 34, so that the transmission shaft 34 rotates under the support of the third bearing 33; since the bevel gear 36 on the transmission shaft 34 and the bevel gear 36 on the butt joint shaft 35 are engaged with each other, the rotation of the transmission shaft 34 drives the butt joint shaft 35 to rotate through the transmission of the bevel gear 36, the butt joint shaft 35 is connected with the driving rod 21 through the second butt joint 91 and the force applying rod 92, so as to drive the driving rod 21 to rotate, the driving rod 21 is screwed with the telescopic arm 22, and under the constraint of the limiting block 84 of the telescopic arm 22 and the limiting groove 71 in the inner cavity of the cylinder body 11, the rotary motion of the driving rod 21 is converted into the axial linear motion of the telescopic arm 22, so as to realize the telescopic function of the device; when multiple cylinder bodies 11 need to be synchronously moved, the transmission shafts 34 of multiple adapter structures 3 are inserted and connected with each other, so that the synchronous movement of multiple cylinder bodies 11 driven by a single motor is realized.

[0037] The working principle is as follows:

[0038] S1, the main body assembly 1 in the cylinder 11 and the oil tank 15 into the corresponding hydraulic oil; prompting the sealing cover 14 fixed by the third bolt 63, the existence of a certain hydraulic oil in the cavity of the cylinder 11 is blocked, and the hydraulic oil in the cavity of the cylinder 11 is located on both sides of the upper and lower of the larger diameter end of the telescopic arm 22 in the lifting assembly 2 to stratify;

[0039] S2, the stratified hydraulic oil at one end of the telescopic arm 22 is communicated with the oil tank 15 through the oil inlet 74 of the cylinder 11 to form a closed loop. As the telescopic arm 22 rises, the hydraulic oil above the one end of the telescopic arm 22 decreases and the hydraulic oil at the bottom increases, and the hydraulic oil in the oil tank 15 and the cavity of the cylinder 11 is continuously filled;

[0040] S3, through the control of the driving motor 4, the base 13 of the cylinder 11 can be disassembled, the adapter box 31 in the adapter structure 3 is inserted into the installation groove 73 at the bottom of the cylinder 11 through the socket 10 for installation, and the adapter box 31 is fixed through the second bolt 62. When the socket 10 is inserted into the installation groove 73, the butt shaft 35 in the groove 93 is inserted into the first butt joint 82 at one end of the driving rod 21 through the second butt joint 91 penetrating the first bearing 12 to match and insert the butt joint, and the second butt joint 91 part force rod 92 is inserted into the force port 83 of the first butt joint 82, so that when the butt shaft 35 rotates, the driving rod 21 is driven to rotate through the force rod 92;

[0041] S4, the driving motor 4 is fixed on the left side wall of the adapter box 31 through the first bolt 61, and the driving end of the driving motor 4 is inserted into the torsion hole 94 of the transmission shaft 34 for butt joint, so that when the driving motor 4 drives the transmission shaft 34 to rotate through the third bearing 33, one of the bevel gears 36 is driven to rotate. Because the bevel gears 36 on the transmission shaft 34 engage with the bevel gears 36 on the butt shaft 35, the butt shaft 35 is driven to rotate through the second bearing 32 and realizes the rotation of the driving rod 21. Finally, the driving rod 21 is driven to rotate through the first bearing 12, and the driving rod 21 is limited through the limiting of the butt shaft 35, so that the driving rod 21 cannot rise under stress. Therefore, the rotation of the driving rod 21 will force the telescopic arm 22 in the lifting assembly 2 connected in rotation to bear stress, and the telescopic arm 22 cannot rotate through the limiting of the limiting block 84 in the limiting groove 71. Therefore, the telescopic arm 22 can only bear stress and move up and down in the cavity of the cylinder 11 to realize telescopic movement. During the up and down movement of the telescopic arm 22, the oil in the oil tank 15 and the cavity of the cylinder 11 keeps constant flow, and the telescopic arm 22 is assisted to bear stress by the constant hydraulic oil;

[0042] S5. Since the adapter arms 75 are symmetrically arranged on the left and right side walls of the oil tank 15, and the adapter arms 75 fit into the adapter grooves 72 of the cylinder body 11 and can be fixed by the second bolts 62, the other assembled cylinder body 11 can be docked with the oil tank 15 on the other cylinder body 11 for horizontal assembly; after the cylinder body 11 is docked through the oil tank 15, the adapter structure 3 at the bottom will also insert one end of the transmission shaft 34 into the force application hole of the other transmission shaft 34 for docking, thereby realizing that one drive motor 4 can control the lifting and lowering of multiple telescopic arms 22;

[0043] S6. If the telescopic arm 22 needs to be controlled by an external oil pump, the adapter structure 3 can be disassembled. When the adapter box 31 is disassembled, the end of the driving rod 21 with the first docking port 82 will be inserted into the first bearing 12 to keep the inner cavity of the cylinder body 11 sealed. Then, the base 13 is installed at the bottom of the cylinder body 11 with the help of the socket 10, and the oil tank 15 is removed. The two oil delivery ports 74 of the cylinder body 11 are installed with the connecting pipe 5, and the oil supply pipe and return flow of the oil pump are connected through the connecting pipe 5. Then, the oil pump can be used to control the amount of oil in the upper and lower layers of one end of the telescopic arm 22 to control the lifting and lowering of the telescopic arm 22 with the help of oil. At this time, the lifting and lowering of the telescopic arm 22 will drive the driving rod 21 to rise and fall synchronously. When the bottom end of the driving rod 21 is separated from the first bearing 12, the bottom of the cylinder body 11 is blocked and sealed by the base 13.

[0044] S7. If the base 13 is removed again and the adapter structure 3 is installed, the telescopic arm 22 is controlled to descend by the oil pump to insert one end of the drive rod 21 into the middle of the first bearing 12, and the one end of the drive rod 21 passes through the first bearing 12. At this time, the one end of the drive rod 21 will be inserted into the compensation hole 81 of the base 13; at this time, the second bolt 62 can be removed and an attempt can be made to pull out the socket 10 of the base 13. Since one end of the drive rod 21 is inserted into the compensation hole 81, the base 13 cannot be removed, and it is necessary to slowly control the external oil pump to slowly raise the telescopic arm 22, and raise and move one end of the drive rod 21 in the first bearing 12 until the base 13 can be removed, and one end of the drive rod 21 needs to be in the first bearing 12 to maintain sealing. After the base 13 is removed, the telescopic arm 22 is lowered again to drive the drive rod 21 through the first bearing 12, so that the drive rod 21 can be effectively plugged into the docking shaft 35.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-cylinder servo synchronous hydraulic device, characterized in that: The invention comprises a main structure, a transfer structure (3) and a drive motor (4); the transfer structure (3) is detachably mounted on the main structure, the drive motor (4) is detachably mounted on the transfer structure (3), and the drive motor (4) is fixed by a first bolt (61); the main structure can be spliced ​​relative to each other in a transverse direction and fixed by a second bolt (62); when the main structure is spliced ​​relative to each other in a transverse direction, the transfer structure (3) is plugged in relative to each other, and the transfer structure (3) is synchronously driven by the drive motor (4); The main structure is used for hydraulic expansion and contraction, the transfer structure (3) controls the main structure via a drive motor (4), and the main structure can also be driven and controlled by an oil pump; The main structure comprises a main body component (1) and a lifting component (2); the lifting component (2) is movably arranged in the main body component (1); The main body assembly (1) comprises a cylinder (11) and a first bearing (12); the first bearing (12) is fixedly embedded in the middle of the lower wall of the cylinder (11), and the first bearing (12) is communicated with the inner cavity; The lifting assembly (2) includes a driving rod (21), a side wall at one end of the driving rod (21) is provided with an arc-shaped first docking port (82), and a rectangular force application port (83) is provided in the middle of the right side wall of the first docking port (82); The transfer structure (3) includes a transfer box (31), a second bearing (32), a pair of third bearings (33), a transmission shaft (34), a docking shaft (35), and a pair of bevel gears (36); The upper wall of the transfer box (31) is symmetrically provided with a socket (10), the transfer box (31) is detachably placed on the bottom of the cylinder body (11), and the transfer box (31) is connected to the cylinder body (11) through the socket (10), a groove (93) corresponding to the first bearing (12) is opened in the middle of the upper wall of the transfer box (31), the second bearing (32) is fixedly embedded in the middle of the groove (93), a pair of the third bearings (33) are symmetrically embedded in the middle of the left and right side walls of the transfer box (31), the left end of the transmission shaft (34) is fixedly inserted in the middle of the third bearing (33) on the left side wall of the transfer box (31), and the right end of the transmission shaft (34) is fixedly inserted into the middle of the third bearing (33) on the right side wall of the transfer box (31). The middle part of the bearing (33) is provided with a torque hole (94) at the middle part of the left end of the transmission shaft (34), and the right end of the transmission shaft (34) is matched with the torque hole (94). One end of the docking shaft (35) is movably embedded in the groove (93), and the other end of the docking shaft (35) is fixedly passed through the middle part of the second bearing (32). One end of the docking shaft (35) is provided with a second docking interface (91) matched with the first docking interface (82), and the second docking interface (91) is provided with a force rod (92) matched with the force application port (83). A pair of bevel gears (36) are fixedly mounted on the other end of the docking shaft (35) and the transmission shaft (34), and the two bevel gears (36) are relatively engaged.

2. A multi-cylinder servo synchronous hydraulic device according to claim 1, characterized in that: The main body assembly (1) further includes a base (13), a sealing cover (14) and an oil tank (15); A circular inner cavity is provided in the middle of the upper wall of the cylinder body (11), and the front and rear side walls of the inner cavity of the cylinder body (11) are symmetrically provided with a limit groove (71), and the height of the limit groove (71) is less than the height of the inner cavity of the cylinder body (11). A pair of transfer grooves (72) are symmetrically provided on the left and right side walls of the cylinder body (11), and a mounting groove (73) connected to the left and right side walls is provided on the lower wall of the cylinder body (11). The upper and lower ends of the left side wall of the cylinder body (11) are both provided with oil delivery ports (74) near the inner cavity. The upper wall of the base (13) is provided with a socket (10) that fits with the mounting groove (73) near the front and rear ends. The base (13) is detachably installed on the bottom of the cylinder body (11), and the socket (10) is inserted into the mounting groove (73). A compensation hole (81) corresponding to the middle of the first bearing (12) is provided in the middle of the upper wall of the base (13). The socket (10) on the base (13) is connected to the first bearing (12) through the first bearing (12). Two bolts (62) are screwed to the front and rear side walls of the cylinder body (11) and fixed tightly. The sealing cover (14) is detachably buckled on the upper wall of the cylinder body (11), and the sealing cover (14) is fixed by a plurality of third bolts (63). The right side wall of the oil tank (15) is provided with oil pipes corresponding to the oil delivery port (74) near the upper and lower ends. The left and right side walls of the oil tank (15) are both provided with transfer arms (75) corresponding to the transfer groove (72). The oil tank (15) ) is detachably mounted on the left side wall of the cylinder body (11), and the oil pipe is movably inserted into the oil delivery port (74), the oil tank (15) is sealed and fitted with the left side wall of the cylinder body (11), and the transfer arm (75) on the right side wall of the oil tank (15) is inserted into the transfer groove (72) on the left side wall of the cylinder body (11), the transfer arm (75) is fixed to the transfer groove (72) by a plurality of second bolts (62), and the second bolts (62) pass through the transfer arm (75).

3. A multi-cylinder servo synchronous hydraulic device according to claim 2, characterized in that: The lifting assembly (2) further includes a telescopic arm (22); One end of the driving rod (21) is detachably inserted through the middle of the first bearing (12), and one end of the driving rod (21) can be inserted into the compensation hole (81) on the upper wall of the base (13). The other end of the driving rod (21) is located in the middle of the inner cavity of the cylinder (11). The front and rear side walls of one end of the telescopic arm (22) are provided with a limit block (84) that fits with the limit groove (71), and a spiral hole is opened in the middle of the lower wall of one end of the telescopic arm (22). One end of the telescopic arm (22) is movably inserted into the cylinder ( 11), and one end of the telescopic arm (22) is located between the oil delivery port (74), the limit block (84) at one end of the telescopic arm (22) is movably embedded in the limit groove (71), and one end of the telescopic arm (22) is fitted with the inner wall of the cylinder body (11), the other end of the telescopic arm (22) is movably passed through the middle of the sealing cover (14), one end of the telescopic arm (22) is movably sleeved on the other end of the driving rod (21), and the telescopic arm (22) is screwed to the driving rod (21) through a spiral hole.

4. A multi-cylinder servo synchronous hydraulic device according to claim 3, characterized in that: The telescopic arm (22) is a T-shaped round rod structure, and the diameter of one end of the telescopic arm (22) is larger than that of the other end.

5. A multi-cylinder servo synchronous hydraulic device according to claim 4, characterized in that: One end of the docking shaft (35) can be plugged into the first docking interface (82) of the driving rod (21) through the second docking interface (91), and the force application rod (92) is inserted into the force application interface (83).

6. A multi-cylinder servo synchronous hydraulic device according to claim 5, characterized in that: The drive motor (4) is detachably mounted in the middle of the left side wall of the adapter box (31), and the drive end of the drive motor (4) is inserted into the left end of the transmission shaft (34), and the drive end of the drive motor (4) is matched with the torque hole (94).

7. A multi-cylinder servo synchronous hydraulic device according to claim 6, characterized in that: When the transfer structures (3) are relatively connected, the right end of one transmission shaft (34) is inserted into the torque hole (94) at the left end of the other transmission shaft (34).

8. The multi-cylinder servo synchronous hydraulic device according to claim 7, characterized in that: The oil delivery port (74) of the cylinder body (11) can be detachably screwed onto a connecting pipe (5) for connecting to an oil supply pump drive.

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