CN-122014702-A - Screw drive with mechanical synchronization and locking

CN122014702ACN 122014702 ACN122014702 ACN 122014702ACN-122014702-A

Abstract

The invention relates to a driving device, in particular to a screw driving device for mechanical synchronization and locking, which comprises a first screw propulsion cylinder, a second screw propulsion cylinder and a synchronous shaft assembly, wherein the second screw propulsion cylinder has the same structure as the first screw propulsion cylinder, the synchronous shaft assembly is connected between the first screw propulsion cylinder and the second screw propulsion cylinder, so that piston rods of the first screw propulsion cylinder and the second screw propulsion cylinder synchronously extend and retract, the first screw propulsion cylinder comprises a cylinder body, a piston rod, a screw rod, a nut and a screw driving assembly, the nut is in threaded connection with the screw rod, the piston rod is fixedly connected with the nut, and the screw driving assembly drives the screw rod to rotate, so that the nut drives the piston rod to extend or retract. The first spiral propulsion cylinder and the second spiral propulsion cylinder synchronously act, and the invention has simple structure and can lock the position of the driven load without other equipment.

Inventors

GAO YADONG
CHEN SHANGQI
WU MENGQIANG
YAN YONG
ZHAO LIMING
YANG KUN
WANG LE
ZHOU ZHONGKAI
LIU KANGNING
HE LIAO
LI TIANRUI
GUO JIANWEI
FENG SHIZE
XU XUELEI
Cui ao
WANG ZHAOSHUAI

Assignees

北京航天发射技术研究所

Dates

Publication Date: 20260512
Application Date: 20260311

Claims (10)

1. The screw driving device for mechanical synchronization and locking is characterized by comprising a first screw driving cylinder (01), a second screw driving cylinder (02) and a synchronous shaft assembly (05), wherein the first screw driving cylinder (01) comprises a cylinder body (11), a piston rod (12), a screw rod (13), a nut (14) and a screw driving assembly (03), the piston rod (12) is arranged in the cylinder body (11), the piston rod (12) is a hollow piece, the screw rod (13) partially stretches into the piston rod (12), the nut (14) is in threaded connection with the screw rod (13), the piston rod (12) is fixedly connected with the nut (14), the screw driving assembly (03) is connected to one end of the screw rod (13) which is positioned outside the piston rod (12), the screw rod driving assembly (03) drives the screw rod (13) to rotate, the nut (12) is driven to stretch out or retract by the screw rod (14), the second screw driving cylinder (02) is in the same structure as the first screw driving cylinder (01), the screw rod (01) is in the same structure, the second screw driving cylinder (02) is in threaded connection with the screw driving cylinder (01) in the same way, and the screw driving cylinder (01) is in the same direction as the screw driving cylinder (01) is in the same direction, the synchronous shaft assembly (05) is connected between the first spiral propulsion cylinder (01) and the second spiral propulsion cylinder (02) so that piston rods of the first spiral propulsion cylinder (01) and the second spiral propulsion cylinder (02) synchronously extend and retract.
2. The mechanically synchronized and locked screw drive of claim 1, wherein the screw drive assembly (03) comprises a hydraulic motor (31), a gearbox drive gear (32), a gearbox driven gear (33), the gearbox drive gear (32) being connected to an output shaft of the hydraulic motor (31), the gearbox driven gear (33) being meshed with the gearbox drive gear (32), the gearbox driven gear (33) being connected to an end of the screw (13) located outside the piston rod (12).
3. Screw drive for mechanical synchronization and locking according to claim 2, characterized in that the screw (13) is a trapezoidal screw and the nut (14) is a trapezoidal nut.
4. A mechanically synchronized and locked screw drive as claimed in claim 3, further comprising an in-place proximity switch (15), a received-position proximity switch (16), said in-place proximity switch (15), said received-position proximity switch (16) being connected to said cylinder (11), said in-place proximity switch (15) being adjacent to an end position of said nut (14) relative to said screw (13), said received-position proximity switch (16) being adjacent to a start position of said nut (14), said in-place proximity switch (15), said received-position proximity switch (16) emitting in-place or out-of-place information of said piston rod (12) when said piston rod (12) is extended or retracted into place, respectively.
5. The mechanically synchronized and locked screw drive of claim 4, wherein said first screw cylinder (01) and said second screw cylinder (02) are each hinged at one end to a support (04).
6. The mechanically synchronized and locked screw drive of claim 5, wherein said synchronizing shaft assembly (05) comprises a first right angle gearbox (51), a first coupling (52), a second right angle gearbox (53), a second coupling (54), and a synchronizing shaft body (55), wherein a first bevel gear (511) and a second bevel gear (512) are provided in said first right angle gearbox (51), said first bevel gear (511) is driven by said gearbox drive gear (32), said second bevel gear (512) is engaged with said first bevel gear (511), said second bevel gear (512) is connected to a first right angle gearbox output shaft (513), a third bevel gear (531) and a fourth bevel gear (532) are provided in said second right angle gearbox (53), said third bevel gear (531) is driven by a gearbox drive gear of said second screw drive cylinder (02), said fourth bevel gear (532) is engaged with said third bevel gear (531), said fourth output shaft (533) is connected to said synchronizing shaft body (55) via said second right angle gearbox (533), the first bevel gear (511) and the third bevel gear (531) are in the same rotation direction, and the second bevel gear (512) and the fourth bevel gear (532) are in opposite rotation directions.
7. Screw drive for mechanical synchronization and locking according to claim 6, characterized in that a brake (56) is also provided on the synchronization shaft body (55).
8. The mechanically synchronized and locked screw drive according to claim 7, further comprising a hydraulic control circuit (07), said hydraulic control circuit (07) comprising a source of oil (71), a three-position four-way electromagnetic directional valve (72), a speed regulating valve (73), an oil supply main pipe (81), an oil return main pipe (85), a first working line (82), a first working branch (83), a second working branch (84), a second working line (86), a third working branch (87), a fourth working branch (88), said source of oil (71) being connected to a P port and a T port of said three-position four-way electromagnetic directional valve (72) through said oil supply main pipe (81) and said oil return main pipe (85), respectively, one end of said first working branch (83) being connected to a working port a of said first hydraulic motor (31), the other end being connected to a terminal of said first working line (82), one end of said second working branch (84) being connected to a working port a of said hydraulic motor of said second screw cylinder (02), the other end being connected to a working port a of said first working line (82), the other end of said first working branch (82) being connected to a working port a of said hydraulic motor (86), the other end of said first working line (82) being connected to a port B of said hydraulic motor (31), one end of the fourth working branch (88) is connected with a working port B of a hydraulic motor of the second spiral propulsion cylinder (02), the other end of the fourth working branch is connected with the tail end of the second working pipeline (86), the starting end of the second working pipeline (86) is connected with a port B of the three-position four-way electromagnetic reversing valve (72), and the speed regulating valve (73) is arranged on the oil supply main pipe (81).
9. The mechanically synchronized and locked screw drive of claim 8, further comprising a one-way throttle valve (74), said one-way throttle valve (74) being disposed on said second working line (86).
10. The mechanically synchronized and locked screw drive of claim 9, further comprising a plurality of manual shut-off valves, wherein a first connecting line is disposed between the first working branch (83) and the third working branch (87), a second connecting line is disposed between the second working branch (84) and the fourth working branch (88), and one manual shut-off valve is disposed on each of the first working branch (83), the second working branch (84), the third working branch (87), the fourth working branch (88), the first connecting line, and the second connecting line.

Description

Screw drive with mechanical synchronization and locking Technical Field The invention relates to a driving device, in particular to a screw driving device with mechanical synchronization and locking. Background In the occasions of large-size heavy load unfolding and withdrawing, lifting and leveling, lifting and descending and the like, in order to reduce the deformation of a load structure, a double hydraulic cylinder or a double electric cylinder is generally adopted for synchronous driving, and a special hydraulic control valve and an electric control system are required for synchronous control. After the load moves in place, in order to ensure personnel and equipment safety, a mechanical bolt is generally adopted to ensure the long-time reliable position locking of the load. When the mechanical bolt cannot be installed, if the scheme of a common hydraulic cylinder and a hydraulic control one-way valve is adopted, the sealing design requirement on the oil cylinder and the pipeline is high. The existing driving equipment cannot realize the position locking of the load through the driving equipment under the condition that the structure is simple and no mechanical bolt is available. Disclosure of Invention The technical problem to be solved by the invention is to provide the screw driving device which is double-cylinder synchronous in the motion process and can lock the mechanical synchronization and locking of the driven load position without other equipment. In order to solve the technical problems, the application provides the following technical scheme: The invention discloses a mechanical synchronous and locking screw driving device, which comprises a first screw propulsion cylinder, a second screw propulsion cylinder and a synchronous shaft assembly, wherein the first screw propulsion cylinder comprises a cylinder body, a piston rod, a screw rod, a nut and the screw driving assembly, the piston rod is arranged in the cylinder body, the piston rod is a hollow piece, the screw rod part stretches into the piston rod, the nut is in threaded connection with the screw rod, the piston rod is fixedly connected with the nut, the screw driving assembly is connected with one end of the screw rod, which is positioned outside the piston rod, the screw driving assembly drives the screw rod to rotate, so that the nut drives the piston rod to stretch out or retract, the second screw propulsion cylinder has the same structure as the first screw propulsion cylinder, the screw rod of the second screw propulsion cylinder and the screw rod of the first screw propulsion cylinder are both hinged on a load, and the synchronous shaft assembly is connected between the first screw propulsion cylinder and the second screw propulsion cylinder, so that the first screw propulsion cylinder and the second screw propulsion cylinder synchronously stretch out or retract. Further, the screw driving assembly comprises a hydraulic motor, a gearbox driving gear and a gearbox driven gear, the gearbox driving gear is connected to an output shaft of the hydraulic motor, the gearbox driven gear is meshed with the gearbox driving gear, and the gearbox driven gear is connected to one end of the screw, which is located outside the piston rod. Further, the screw is a trapezoidal screw, and the nut is a trapezoidal nut. The piston rod is provided with a cylinder body, a nut and a nut, and is characterized by further comprising an in-place extending proximity switch and a receiving proximity switch, wherein the in-place extending proximity switch and the receiving proximity switch are both connected to the cylinder body, the in-place extending proximity switch is close to the end position of the nut, which is opposite to the screw rod, and the receiving proximity switch is close to the starting point of the nut. Further, one end of each of the first spiral propulsion cylinder and the second spiral propulsion cylinder is hinged to the support. Further, the synchronizing shaft assembly comprises a first right-angle gear box, a first coupler, a second right-angle gear box, a second coupler and a synchronizing shaft body, wherein a first bevel gear and a second bevel gear are arranged in the first right-angle gear box, the first bevel gear is driven by a gearbox driving gear, the second bevel gear is meshed with the first bevel gear, the second bevel gear is connected to a first right-angle gear box output shaft, a third bevel gear and a fourth bevel gear are arranged in the second right-angle gear box, the third bevel gear is driven by the gearbox driving gear of the second spiral propelling cylinder, the fourth bevel gear is meshed with the third bevel gear, the fourth bevel gear is connected to a second right-angle gear box output shaft, the first right-angle gear box output shaft is connected with the synchronizing shaft body through the first coupler, the second right-angle gear box output shaft is connected with the synchronizing shaft body throug