Electromechanical integrated servo oil cylinder structure

Abstract

The utility model discloses a mechanical-electrical integration servo oil cylinder structure which comprises a servo motor, a transmission mechanism and an oil cylinder barrel, a variable pressure cavity is arranged in the oil cylinder barrel, a sliding block is arranged in the variable pressure cavity, and the sliding block is connected to the servo motor through the transmission mechanism so as to drive the sliding block to do reciprocating motion fit in the axial direction in the variable pressure cavity. At least one oil inlet and outlet connector used for being connected with working equipment is formed in the side, away from the sliding block, of the variable-pressure cavity. The servo motor drives the synchronizing wheel transmission device through the planetary reduction gear and drives the driving lead screw shaft in the driving cylinder to rotate, then the rotating motion is converted into the linear motion of the lead screw pair through the thread pair, the piston rod and the sliding block are pushed to compress a variable-pressure cavity medium of the oil cylinder so as to generate high pressure, and the high-pressure pipe is connected with working equipment. A traditional hydraulic system is replaced with mechanical and electrical integration design, and the advantages of being fast in pressurization, high in pressing precision and low in energy consumption are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to shoe material press forming equipment technical field especially is related to a servo oil cylinder structure of mechatronics. BACKGROUND

[0002] In shoe material press forming process, traditional equipment generally adopts gas pressure or oil pump driving system, and has the following shortcomings: 1, power transmission efficiency is low: gas pressure system relies on cylinder piston movement, and there is energy loss caused by gas compression, and hydraulic system is limited by oil pump volumetric efficiency, and it is difficult to meet the demand of high-speed supercharging;2, the stability of die is poor: traditional hydraulic system adjusts pressure through overflow valve, and there is hysteresis, and cylinder piston is easy to produce axial deviation (when not setting anti-rotation structure) due to hydraulic pressure fluctuation, resulting in die alignment deviation;3, energy consumption and maintenance cost are high: hydraulic system needs to be configured with independent oil circuit circulating device, and there is oil leakage pollution risk, and hydraulic oil and filter element need to be replaced regularly;4, response speed is limited: gas pressure / oil pump system relies on pipeline pressure transmission, and dynamic response time is usually greater than or equal to 0.5 seconds, and millisecond level precision die control cannot be realized. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model aims at providing a servo oil cylinder structure of mechatronics, realizing rapid supercharging and high-precision press force control of shoe material press forming equipment, improving the production efficiency of the equipment and reducing the maintenance cost of the equipment.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme of a servo oil cylinder structure of mechatronics, including servo motor, transmission mechanism and oil cylinder cylinder, the inside of oil cylinder cylinder is equipped with variable pressure chamber, a sliding block is equipped in variable pressure chamber, the sliding block is connected to servo motor through transmission mechanism, to realize the reciprocating movement of sliding block in variable pressure chamber in axial direction, and variable pressure chamber is equipped with at least one oil inlet and outlet interface for connecting working equipment on the side away from sliding block.

[0005] In a further technical solution, the transmission mechanism comprises a planetary reduction device, a connecting plate, a synchronous wheel transmission device, and a drive cylinder. The planetary reduction device and the drive cylinder are fixedly installed on the same side of the connecting plate, and the synchronous wheel transmission device is arranged on the other side of the connecting plate. The output shaft of the servo motor is connected to the input end of the planetary reduction device, and the output shaft of the planetary reduction device is connected to the first side of the synchronous wheel transmission device. The drive cylinder is coaxially connected with the cylinder barrel of the oil cylinder, and a drive screw shaft is rotatably installed in the interior of the drive cylinder. The drive screw shaft is connected to the second side of the synchronous wheel transmission device. A screw pair is also slidably installed in the inner cavity of the drive cylinder, and is movably arranged along the axial direction of the screw pair. The screw pair is threadedly connected with the drive screw shaft. A piston rod is fixedly arranged on the front side of the screw pair. The end of the piston rod extends into the inner cavity of the oil cylinder barrel and is connected with the sliding block. The piston rod is coaxially matched with the drive screw shaft. The interior of the piston rod is hollowed out to form a screw avoiding cavity, and the drive screw shaft is movably assembled in the screw avoiding cavity.

[0006] In a further technical solution, the synchronous wheel transmission device comprises a driving synchronous wheel, a driven synchronous wheel, and a synchronous belt. The driving synchronous wheel and the driven synchronous wheel are rotatably installed on the outer side of the connecting plate. The driving synchronous wheel is coaxially connected with the output shaft of the planetary reduction device, and the driven synchronous wheel is coaxially connected with the drive screw shaft. The synchronous belt is wound around the driving synchronous wheel and the driven synchronous wheel. A belt cover is arranged on the outer side of the connecting plate to cover the synchronous wheel transmission device.

[0007] In a further technical solution, the connecting plate is provided with a bearing seat, which is fixedly installed on the connecting plate by a locking nut. A first bearing is arranged on one side of the bearing seat, and a second bearing is arranged on the other side of the bearing seat. The end of the drive screw shaft is provided with a shaft connecting portion, which is inserted into the first bearing and the second bearing. The shaft connecting portion extends to the outer side of the connecting plate and is coaxially connected with the driven synchronous wheel. The drive cylinder is fixed to the bearing seat by bolts and is coaxially arranged with the bearing seat.

[0008] In a further technical solution, the inner cavity of the drive cylinder is provided with an anti-rotation key structure. The anti-rotation key structure comprises an anti-rotation key strip and an anti-rotation key groove. The anti-rotation key strip and the anti-rotation key groove are arranged on the inner wall of the drive cylinder and the screw pair, respectively. The anti-rotation key strip and the anti-rotation key groove are slidably inserted and matched to prevent the screw pair and the piston rod from rotating and causing accidental pressure relief.

[0009] In a further technical solution, the outer wall of the screw pair is provided with at least one groove, and a rubber ring is arranged in the groove. The screw pair is clamped to the inner wall of the drive cylinder by the rubber ring to avoid hard friction with the inner wall of the drive cylinder and improve the stability of the screw pair and the piston rod during reciprocating motion.

[0010] In a further technical solution, the outer end of the driving cylinder is coaxially fixed with a first flange, the first end of the oil cylinder barrel is coaxially mounted on the first flange, the second end of the oil cylinder barrel is coaxially assembled with a second flange, a plurality of locking screws are connected between the circumferential portions of the first flange and the second flange, each locking screw is distributed in the circumferential direction, and the first flange and the second flange are axially locked through each locking screw.

[0011] In a further technical solution, the inner side of the second flange is provided with a pressure sensor for real-time monitoring of the internal pressure of the pressure changing cavity.

[0012] In a further technical solution, the sliding block comprises an inner core, the outer portion of the inner core is injection molded with a piston structure, and the inner side of the inner core is molded with a connecting port connected with the end of the piston rod.

[0013] In a further technical solution, the inside of the servo motor is provided with an electromagnetic brake.

[0014] After adopting the above structure, the servo oil cylinder structure of the utility model has the advantages compared with the prior art: the utility model provides a servo oil cylinder structure of mechatronics, replaces the traditional oil pressure\air pressure driving device, reduces the equipment energy consumption, improves the pressing precision and pressure stability of the shoe machine; the power transmission chain composed of the servo motor, the planetary reducer and the synchronous wheel transmission device converts the high rotation speed of the servo motor into high torque output, greatly improves the pressing response speed (the pressurization response time is less than or equal to 50 ms), the precise cooperation between the driving screw rod shaft and the screw rod pair linearly converts the rotary motion into the linear motion of the piston rod, the positioning precision of repeated pressing work is high, and the mold misplacement problem caused by the compression of oil in the traditional hydraulic cylinder is solved; the anti-rotation key structure can prevent the screw rod pair and the piston rod from rotating, thereby causing accidental pressure relief, and further improves the pressure supply stability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described below in combination with the drawings and embodiments.

[0016] Figure 1 is the structure schematic view of the utility model.

[0017] Figure 2 is the structure schematic view of the shoe material pressing and forming equipment assembled with the servo oil cylinder structure of the embodiment. DETAILED DESCRIPTION

[0018] The following is only a preferred embodiment of the utility model, and does not limit the protection scope of the utility model.

[0019] As Figure 1 and Figure 2The electromechanical servo oil cylinder structure comprises a servo motor 1, a planetary reducer 2, a connecting plate 3, a synchronous wheel transmission device, a driving cylinder 13 and an oil cylinder barrel 18, the planetary reducer 2 and the driving cylinder 13 are fixedly installed on the same side of the connecting plate 3, the synchronous wheel transmission device is arranged on the other side of the connecting plate 3, the output shaft of the servo motor 1 is connected to the input end of the planetary reducer 2, and the output shaft of the planetary reducer 2 is connected to the first side of the synchronous wheel transmission device.

[0020] The electromechanical servo oil cylinder structure provided by the utility model replaces the traditional oil pressure / gas pressure driving device, reduces the equipment energy consumption, improves the pressing precision and pressure maintaining stability of the shoe machine.

[0021] The power transmission chain composed of the servo motor 1, the planetary reducer 2 and the synchronous wheel transmission device converts the high rotating speed of the servo motor 1 into high torque output, greatly improves the pressing response speed and the pressure increasing response time (less than or equal to 50 ms).

[0022] Specifically, the synchronous wheel transmission device comprises a driving synchronous wheel 4, a driven synchronous wheel 7 and a synchronous belt 5, the driving synchronous wheel 4 and the driven synchronous wheel 7 are rotatably installed on the outer side of the connecting plate 3, the driving synchronous wheel 4 is coaxially connected with the output shaft of the planetary reducer 2, the driven synchronous wheel 7 is coaxially connected with the driving screw shaft 12, and the synchronous belt 5 is wound on the driving synchronous wheel 4 and the driven synchronous wheel 7.

[0023] Specifically, the connecting plate 3 is provided with a bearing seat 10 fixedly installed on the connecting plate 3 through a locking nut 8; one side of the bearing seat 10 is provided with a first bearing 9, and the other side is provided with a second bearing 11; an end of a driving screw shaft 12 is provided with a shaft joint portion inserted into the first bearing 9 and the second bearing 11, the shaft joint portion extends to the outside of the connecting plate 3 and is coaxially connected with the passive synchronous wheel 7; a driving cylinder 13 is fixedly connected with the bearing seat 10 through bolts and is coaxially arranged with the bearing seat 10.

[0024] The precise cooperation between the driving screw shaft 12 and the screw pair 15 linearly converts the rotary motion into the linear motion of the piston rod, the positioning accuracy of the repeated pressing work is high, and the mold misalignment problem caused by the compression of the oil in the traditional hydraulic cylinder is solved.

[0025] Specifically, the inner cavity of the driving cylinder 13 is provided with an anti-rotation key structure 14, the anti-rotation key structure 14 includes an anti-rotation key strip 141 and an anti-rotation key groove, the anti-rotation key strip 141 and the anti-rotation key groove are respectively arranged on the inner wall of the driving cylinder 13 and the screw pair 15, and the anti-rotation key strip 141 and the anti-rotation key groove are slidingly and insertingly matched to prevent the screw pair 15 and the piston rod 16 from rotating and causing accidental pressure relief.

[0026] The anti-rotation key structure 14 can prevent the screw pair 15 and the piston rod 16 from rotating and causing accidental pressure relief, and further improve the pressure supply stability of the structure.

[0027] Specifically, the outer wall of the screw pair 15 is provided with at least one groove 150, and a rubber ring is arranged in the groove 150; the screw pair 15 is clamped on the inner wall of the driving cylinder 13 through the rubber ring to avoid hard friction with the inner wall of the driving cylinder 13 and improve the stability of the reciprocating motion of the screw pair 15 and the piston rod 16.

[0028] Specifically, the outer end of the driving cylinder 13 is coaxially fixed with a first flange 20, the first end of an oil cylinder barrel 18 is coaxially installed on the first flange 20, the second end of the oil cylinder barrel 18 is coaxially assembled with a second flange 21, a plurality of locking screws 19 are connected between the circumferential portions of the first flange 20 and the second flange 21, the locking screws 19 are distributed at intervals in the circumferential direction, and the first flange 20 and the second flange 21 are axially locked through the locking screws 19; an oil inlet and outlet interface 22 is arranged at the center position of the second flange 21.

[0029] Specifically, the inner side of the second flange 21 is provided with a pressure sensor for real-time monitoring of the internal pressure of the pressure changing cavity 180.

[0030] Specifically, the bottoms of the first flange 20 and the second flange 21 are respectively provided with mounting legs 23.

[0031] Specifically, the slider 17 comprises an inner core member, an outer portion of the inner core member is injection molded with a piston structure, and an inner side of the inner core member is molded with a connecting port, which is connected with an end portion of the piston rod 16.

[0032] Specifically, the inside of the servo motor 1 is provided with an electromagnetic brake.

[0033] The above is only the preferred embodiment of the present application, for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A mechatronic servo cylinder arrangement, characterized by: The servo motor (1), transmission mechanism and oil cylinder barrel (18), The inside of the oil cylinder barrel (18) is provided with a variable pressure cavity (180), the variable pressure cavity (180) is provided with a sliding block (17), the sliding block (17) is connected to the servo motor through the transmission mechanism, so as to realize the driving of the sliding block (17) in the variable pressure cavity (180) in the axial direction reciprocating cooperation, the variable pressure cavity (180) is provided with at least one oil inlet and outlet interface (22) for connecting the working equipment on the side away from the sliding block (17).

2. The electromechanically integrated servo cylinder according to claim 1, characterized in that: The transmission mechanism comprises a planetary reducer (2), a connecting plate (3), a synchronous wheel transmission device and a driving cylinder (13), The planetary reducer (2) and the driving cylinder (13) are respectively fixedly installed on the same side of the connecting plate (3), and the synchronous wheel transmission device is arranged on the other side of the connecting plate (3), The output shaft of the servo motor (1) is connected to the input end of the planetary reducer (2), and the output shaft of the planetary reducer (2) is connected to the first side of the synchronous wheel transmission device; The driving cylinder (13) is coaxially connected with the oil cylinder barrel (18), a driving screw shaft (12) is rotatably installed in the inside of the driving cylinder (13), the driving screw shaft (12) is connected to the second side of the synchronous wheel transmission device; a screw rod pair (15) is also slidably installed in the inner cavity of the driving cylinder (13), the screw rod pair (15) is movably arranged along the axial direction thereof, the screw rod pair (15) is threadedly connected with the driving screw shaft (12), a piston rod (16) is fixed to the front side of the screw rod pair (15), the end of the piston rod (16) extends to the inner cavity of the oil cylinder barrel (18) and is connected with the sliding block (17), the piston rod (16) is coaxially matched with the driving screw shaft (12), the inside of the piston rod (16) is hollowed out to form a screw rod avoiding cavity (160), and the driving screw shaft (12) is movably assembled in the screw rod avoiding cavity (160).

3. The electromechanically integrated servo cylinder according to claim 2, characterized in that: The synchronous wheel transmission device comprises a driving synchronous wheel (4), a driven synchronous wheel (7) and a synchronous belt (5), the driving synchronous wheel (4) and the driven synchronous wheel (7) are rotatably installed on the outside of the connecting plate (3), the driving synchronous wheel (4) is coaxially connected with the output shaft of the planetary reducer (2), the driven synchronous wheel (7) is coaxially connected with the driving screw shaft (12), and the synchronous belt (5) is wound on the driving synchronous wheel (4) and the driven synchronous wheel (7) respectively; a belt cover (6) is arranged on the outside of the connecting plate (3) to cover the synchronous wheel transmission device.

4. The electromechanically integrated servo cylinder according to claim 3, characterized in that: The connecting plate (3) is provided with a bearing seat (10), the bearing seat (10) is fixedly installed on the connecting plate (3) through a locking nut (8); one side of the bearing seat (10) is provided with a first bearing (9), and the other side is provided with a second bearing (11), an end of the driving screw shaft (12) is provided with a shaft joint portion, the shaft joint portion is inserted into the first bearing (9) and the second bearing (11), the shaft joint portion extends to the outside of the connecting plate (3) and is coaxially connected with the driven synchronous wheel (7); the driving cylinder (13) is fixed to the bearing seat (10) through bolts and is coaxially arranged with the bearing seat (10).

5. The electromechanically integrated servo cylinder according to claim 4, characterized in that: The inner cavity of the driving cylinder (13) is provided with an anti-rotation key structure (14), which comprises an anti-rotation key strip (141) and an anti-rotation key groove, and the anti-rotation key strip (141) and the anti-rotation key groove are respectively arranged on the inner wall of the driving cylinder (13) and the screw rod pair (15), and the anti-rotation key strip (141) and the anti-rotation key groove are in sliding and inserting fit, so as to prevent the screw rod pair (15) and the piston rod (16) from rotating and causing accidental pressure relief.

6. The electromechanically integrated servo cylinder according to claim 5, characterized in that: The outer wall of the screw rod pair (15) is provided with at least one groove (150), and a rubber ring is arranged in the groove (150). The screw rod pair (15) is clamped on the inner wall of the driving cylinder (13) through the rubber ring, so as to avoid hard friction with the inner wall of the driving cylinder (13) and improve the stability of the reciprocating motion of the screw rod pair (15) and the piston rod (16).

7. The electromechanically integrated servo cylinder according to claim 6, characterized in that: The outer end of the driving cylinder (13) is coaxially fixed with a first flange (20), the first end of the oil cylinder barrel (18) is coaxially installed on the first flange (20), the second end of the oil cylinder barrel (18) is coaxially assembled with a second flange (21), a plurality of locking screws (19) are connected between the circumferential parts of the first flange (20) and the second flange (21), each locking screw (19) is distributed in the circumferential direction, and the first flange (20) and the second flange (21) are axially locked through each locking screw (19); the oil inlet and outlet interface (22) is arranged at the center position of the second flange (21).

8. The electromechanically integrated servo cylinder according to claim 7, characterized in that: The inner side of the second flange (21) is provided with a pressure sensor for real-time monitoring of the internal pressure of the variable pressure chamber (180).

9. The electromechanically integrated servo cylinder according to claim 8, characterized in that: The sliding block (17) comprises an inner core, and the outer part of the inner core is injection molded with a piston structure, and the inner side of the inner core is molded with a connecting port connected with the end of the piston rod (16).

10. The electromechanically integrated servo cylinder of claim 1, wherein: The inside of the servo motor (1) is provided with an electromagnetic brake.

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