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CN-224214477-U - High-precision mechanical and electric locking oil cylinder

CN224214477UCN 224214477 UCN224214477 UCN 224214477UCN-224214477-U

Abstract

The application relates to the technical field of hydraulic cylinders, in particular to a high-precision mechanical and electric locking cylinder which comprises a cylinder barrel and a piston rod, wherein the piston rod is inserted into the cylinder barrel and is in sliding fit with the cylinder barrel along the axial direction of the cylinder barrel, the piston rod is arranged in a hollow mode, a nut is connected to one end of the piston rod, which is positioned in the cylinder barrel, a screw rod is inserted into the piston rod, the screw rod is in rotating fit with the nut, the screw rod is arranged in a hollow mode, a rocker is arranged in the cylinder barrel in a rotating mode, the rocker is inserted into the screw rod and is in sliding fit with the screw rod along the axial direction of the cylinder barrel, a driving device is arranged at the bottom of the cylinder barrel and is used for driving the rocker to rotate, a sensor assembly is used for oil pressure of a rodless cavity in the cylinder barrel, and the sensor assembly is electrically connected with the driving device. When the hydraulic system fails, the oil cylinder can automatically perform mechanical pressure maintaining by monitoring the pressure change of the cavity in real time, so that the whole press filtration cycle is ensured.

Inventors

  • Qiu yongning
  • SHEN WENBIN
  • WANG XILIANG
  • WANG ZHAOXIANG
  • ZHENG YINGQIAN
  • Sun Dengshuai
  • YE JING
  • FENG JIANJUN
  • SHI JUNHONG
  • ZHANG GUANGTAO

Assignees

  • 江苏恒立液压股份有限公司

Dates

Publication Date
20260508
Application Date
20250519

Claims (12)

  1. 1. A high-precision mechanical and electric locking cylinder is characterized by comprising, A cylinder (1), and The piston rod (2) is inserted into the cylinder barrel (1) and is in sliding fit with the cylinder barrel (1) along the axial direction of the cylinder barrel (1), and the piston rod (2) is arranged in a hollow mode; a nut (6), wherein the nut (6) is connected to one end of the piston rod (2) positioned in the cylinder barrel (1); The screw rod (4) is inserted into the piston rod (2), the screw rod (4) is in running fit with the nut (6), and the screw rod (4) is arranged in a hollow mode; The rocker (5) is rotatably arranged in the cylinder barrel (1), and the rocker (5) is inserted into the screw (4) and is in sliding fit with the screw (4) along the axial direction of the cylinder barrel (1); The driving device (14) is arranged at the bottom of the cylinder barrel (1) and used for driving the rocker (5) to rotate; And the sensor assembly is used for monitoring the oil pressure of a rodless cavity in the cylinder barrel (1) and is electrically connected with the driving device (14).
  2. 2. The high-precision mechanical and electric locking cylinder according to claim 1, characterized in that an oil inlet (23) is arranged on the cylinder barrel (1), the oil inlet (23) is communicated with the rodless cavity, and the sensor assembly comprises a pressure measuring joint, and the pressure measuring joint is electrically connected with the driving device (14).
  3. 3. The high-precision mechanical and electric locking cylinder according to claim 1, wherein a cylinder bottom (7) is arranged at the bottom of the cylinder barrel (1), a limit sleeve (17) is connected to the cylinder bottom (7), the limit sleeve (17) is sleeved outside a rocker (5), the rocker (5) is in running fit with the limit sleeve (17), the sensor assembly comprises a pressure sensor (18), the pressure sensor (18) is used for monitoring the position of the screw (4), and the pressure sensor (18) is electrically connected with the driving device (14).
  4. 4. A high-precision mechanical and electric locking cylinder according to claim 3, characterized in that the cylinder bottom (7) is provided with a through hole for the rocker (5) to penetrate, the rocker (5) penetrates the cylinder bottom (7) through the through hole and is rotationally connected with the cylinder bottom (7) through two bearings (19), a rotary sealing ring (20) is further arranged between the two bearings (19), and the rotary sealing ring (20) is arranged between the rocker (5) and the inner side wall of the through hole.
  5. 5. The high-precision mechanical and electric locking cylinder according to claim 4, wherein the through hole is provided with a mounting groove for mounting a bearing (19), a limiting boss is arranged on the limiting sleeve (17), the limiting boss is embedded into the mounting groove which is close to the inside of the cylinder barrel (1) to axially limit the bearing (19), a limiting nut (21) is arranged on one side, far away from the inside of the cylinder barrel (1), of the cylinder bottom (7), a limiting boss is also arranged on the limiting nut (21), and the limiting boss on the limiting nut (21) is embedded into the mounting groove which is far away from the inside of the cylinder barrel (1) to axially limit the bearing (19).
  6. 6. The high-precision mechanical and electric locking oil cylinder according to claim 1, wherein a flange (15) is arranged on the inner side of one end, close to the cylinder bottom (7), of the screw (4), the rocker (5) penetrates through the flange (15) and is inserted into the screw (4), a limiting surface is arranged on the outer side wall, close to the cylinder bottom (7), of one side of the rocker (5), and the rocker (5) is in sliding fit with the flange (15) along the axial direction of the cylinder barrel (1) through the limiting surface.
  7. 7. The high-precision mechanical and electric locking cylinder according to claim 1, wherein a first supporting ring (11) is arranged outside one end, close to the cylinder bottom (7), of the screw (4), and the first supporting ring (11) is in sliding fit with the inner side wall of the cylinder barrel (1).
  8. 8. The high-precision mechanical and electric locking cylinder according to claim 1, wherein a second support ring (12) is fixedly sleeved outside one end of the screw rod (4) far away from the cylinder bottom (7), and the second support ring (12) is in sliding fit with the inner side wall of the piston rod (2).
  9. 9. The high-precision mechanical and electric locking cylinder according to claim 1, wherein a third supporting ring (13) is fixedly sleeved outside one end of the rocker (5) inserted into the screw (4), and the third supporting ring (13) is in sliding fit with the inner side wall of the screw (4).
  10. 10. The high-precision mechanical and electric locking cylinder according to any one of claims 7-9, wherein the surface of the supporting ring is made of copper by welding or spraying.
  11. 11. The high-precision mechanical and electric locking cylinder according to any one of claims 7 to 9, wherein lubrication grooves (24) are formed in the outer side wall of the support ring, the lubrication grooves (24) comprise mutually staggered communication annular grooves (25) and longitudinal grooves (26), the annular grooves (25) are annularly arranged, a plurality of the annular grooves (25) are axially arranged along the cylinder barrel, the longitudinal direction of the longitudinal grooves (26) is axially arranged along the cylinder barrel, and a plurality of the longitudinal grooves (26) are circumferentially arranged along the support ring.
  12. 12. The high-precision mechanical and electric locking cylinder according to claim 1, wherein a hole sealing ring (9) and a guide ring (10) are arranged between the piston (3) and the cylinder barrel (1), the hole sealing rings (9) are respectively arranged close to two ends of the piston (3), the guide ring (10) is arranged between the hole sealing rings (9), and the hole sealing rings (9) arranged at two ends of the piston (3) are installed back to back.

Description

High-precision mechanical and electric locking oil cylinder Technical Field The application relates to the technical field of hydraulic cylinders, in particular to a high-precision mechanical and electric locking cylinder. Background The filter press is a device for separating solid from liquid by passing a solid-liquid mixture through a filter plate, a filter element, a filter screen and other membrane devices. The filter press is widely applied to industries such as mines, municipal administration, rural sewage and the like, and is partially applied to industries such as medical treatment, food, brewing, scientific experiments and the like, most of conventional filter presses continuously and uninterruptedly provide enough thrust through power elements such as an oil cylinder and ensure that the pressure of the conventional filter press is maintained within a certain pressure range, further the filter plate is extruded to achieve solid-liquid separation operation, and the conventional pressure maintaining can be realized through continuous oil supply and pressure maintaining, but due to the existence of a sealing ring and the internal leakage of the oil cylinder within an allowable range, the oil cylinder is required to start oil charge and pressure maintaining in time, and in order to ensure absolute safety, a mechanical pressure maintaining is required to ensure the smooth completion of one period of the filter pressing process of the hydraulic system after failure, and a safer and more reliable mechanical pressure maintaining safety lock is simultaneously provided on the premise of the hydraulic pressure maintaining of the oil cylinder. The existing hydraulic cylinder with the safety lock is characterized in that an internal rotation trapezoidal thread is processed in an inner hole of a piston rod, an external rotation trapezoidal thread is processed on a matched screw rod, the screw rod is driven to extend simultaneously when the piston rod extends, after the pre-tightening force of a designated filter plate is reached, the cylinder begins to maintain pressure, once a hydraulic system begins to fail, a rocker is manually driven by manpower, the rocker is connected with the screw rod through a flat key, the screw rod begins to slowly contact with a cylinder bottom under the driving of the trapezoidal thread, even if the hydraulic system fails after contact, the screw rod can bear axial force through the trapezoidal thread, further the piston rod can not retract, the cylinder can provide designated thrust and no pressure relief exists, but the defects of 1 are overcome, the whole operation is incoherent, when the piston rod extends, the piston rod has horizontal downward deflection due to the influence of gravity, the situation that when the rocker rotates, a gap is tightly attached to the meshing position of the trapezoidal thread, and even a clamping state exists. 2. The trapezoidal transmission has the defects of low transmission efficiency, high processing difficulty, low precision, short service life and the like, and the requirements of higher transmission efficiency, high precision and the like are required because the mechanical pressure maintaining requirement reacts in the shortest time, and the trapezoidal thread cannot be maintained in time and on the spot when a problem occurs. 3. The filter press mainly completes equipment for separating solid from liquid, water can not be prevented from splashing on the oil cylinder, the design scheme has no waterproof design and the like, and the risk of oil cylinder leakage exists. 4. The real-time performance and the rapidness of the mechanical pressure maintaining can not be ensured, and because the mechanical pressure maintaining starts to play a role when the hydraulic system fails, the design is that the manual pressure maintaining is carried out through the manual rocking handle, when the failure occurs, the manual pressure maintaining is unable to ensure that workers are beside the manual pressure maintaining, once the failure occurs, the manual pressure maintaining is unable to timely react, and the manual rocking handle is a test on the physical ability of the people, and the problems of untimely reaction and the like exist. And the rocker rotation distance can not be confirmed, the bottom can be known only by rotating the rocker when the rocker is required to shake to the bottom, feedback can not be accurately obtained each time, and the bottom of the oil cylinder is easy to damage due to impact each time for a long time. Therefore, how to develop a locking cylinder with reliable and timely mechanical pressure maintaining, easy maintenance and high precision is particularly important. Disclosure of utility model The hydraulic locking cylinder solves the technical problems that an existing locking cylinder is not timely in locking reaction under the condition of hydraulic failure, hydraulic pressure maintaining and mechanical pressure maintaini