CN110374954B - Sectional reinforcement type linear motion device - Google Patents
Sectional reinforcement type linear motion device Download PDFInfo
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- CN110374954B CN110374954B CN201910659244.3A CN201910659244A CN110374954B CN 110374954 B CN110374954 B CN 110374954B CN 201910659244 A CN201910659244 A CN 201910659244A CN 110374954 B CN110374954 B CN 110374954B
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- cylinder barrel
- linear motion
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- partition plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/088—Characterised by the construction of the motor unit the motor using combined actuation, e.g. electric and fluid actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1433—End caps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Actuator (AREA)
Abstract
The invention provides a sectional reinforcement type linear motion device, which comprises a cylinder barrel; the partition plate is fixedly arranged in the cylinder barrel, and a piston hole is formed in the partition plate; the front piston is arranged at the first end of the partition plate in the cylinder barrel in a sliding manner, and the first end of the front piston is fixedly connected with a front piston rod; the rear piston is arranged at the second end of the partition plate in the cylinder barrel in a sliding manner, a rear piston rod is fixedly arranged at the first end of the rear piston, and the rear piston rod is arranged corresponding to the piston hole; the stator is arranged on the inner side wall of the cylinder barrel in a surrounding mode, the rotor is arranged between the stators, and the first end of the rotor is fixedly connected with the rear piston. The invention comprises a multi-section linear advancing and resetting process, has the advantages of high working speed and large linear driving force, has higher dynamic rigidity and stable pneumatic transmission, and overcomes the defect of using a single linear motor or a single cylinder.
Description
Technical Field
The invention relates to the technical field of linear driving devices, in particular to a sectional reinforcement type linear motion device.
Background
A linear motor is a driving device that directly converts electric energy into mechanical energy for linear motion without any intermediate conversion mechanism. The linear motor can be regarded as a structural modification of the rotary motor, and can be regarded as a rotary motor which is split along the radial direction and then is flattened and evolved. With the rapid development of automatic control technology and microcomputers, higher requirements are put forward on the positioning accuracy of various automatic control systems, and under the condition, a linear motion driving device consisting of a traditional rotating motor and a set of conversion mechanism is far from meeting the requirements of modern control systems. For this reason, linear motors are being researched, developed and applied in many countries of the world, resulting in wider and wider application fields of linear motors.
However, the linear motor has extremely low dynamic rigidity, cannot play a role in buffering and damping, and easily causes resonance of other parts of the machine tool during high-speed motion; in addition, the linear motor cannot be locked automatically, and in order to ensure reliable operation, a moving shaft driven by the linear motor, particularly a vertical moving shaft, needs to be additionally provided with a locking mechanism, so that the complexity of the machine tool is increased; in addition, the thrust of the linear motor is not large enough, and the requirement of a heavy-load working condition is difficult to meet.
The cylinder is a pneumatic actuator for converting the pressure energy of compressed gas into mechanical energy in pneumatic transmission. The cylinder comprises a cylinder barrel, an end cover, a piston rod, a sealing element and the like. The cylinder can reliably work under severe conditions, is simple to operate and can basically realize maintenance-free operation. The cylinder is good at reciprocating linear motion, and is particularly suitable for linear conveying of workpieces which are the most transmission requirements in industrial automation.
However, the cylinder is usually used with an air compressor, which increases the floor area of the equipment and increases the production cost. The air pressure may change during the air pressure transmission process, resulting in poor stability. Therefore, how to better realize the linear motion has become an important research direction for the development of mechanical equipment, and a novel linear motion device capable of avoiding the defects of a linear motor and an air cylinder is also needed in the market at present.
Disclosure of Invention
The invention provides a segmented reinforcement type linear motion device, and aims to solve the problems that an existing linear motor is low in dynamic rigidity, cannot play a role in buffering and damping, cannot be locked automatically, is not large enough in thrust, a single air cylinder is usually matched with an air compressor and the like for use, air pressure is likely to change in an air pressure transmission process, and stability is not high.
In order to achieve the above object, the present invention provides a segment reinforcement type linear motion device, comprising:
the cylinder barrel is provided with a front cylinder cover at a first end, a rear cylinder cover at a second end, and through holes are formed in the front cylinder cover and the rear cylinder cover;
the partition plate is fixedly arranged in the cylinder barrel, and a piston hole is formed in the partition plate;
the front piston is slidably arranged at the first end of the partition plate in the cylinder barrel, the first end of the front piston is fixedly connected with a front piston rod, and the front piston rod is slidably arranged in a through hole of the front cylinder cover;
the rear piston is arranged at the second end of the partition plate in the cylinder barrel in a sliding manner, a rear piston rod is fixedly arranged at the first end of the rear piston, and the rear piston rod is arranged corresponding to the piston hole;
the stator is arranged on the inner side wall of the cylinder in a surrounding mode, the stator is located at the second end of the rear piston, the rotor is arranged between the stators, and the first end of the rotor is fixedly connected with the rear piston.
The front piston, the partition plate and the cylinder barrel enclose a first cavity, the partition plate, the rear piston and the cylinder barrel enclose a second cavity, and the rear piston, the rear cylinder cover and the cylinder barrel enclose a third cavity;
and a pipeline is arranged on the side wall of the cylinder barrel and is communicated with the second cavity and the third cavity of the cylinder barrel.
The first end of the front piston is further provided with a spring device, and two ends of the spring device are connected with the front piston and the front cylinder cover respectively.
The outer diameters of the front piston and the rear piston are equal, and the front piston and the rear piston are in clearance fit with the inner side wall of the cylinder barrel.
Wherein, clearance fit is adopted between the rear piston rod and the piston hole.
And sealing rings are arranged on the outer side walls of the front piston, the rear piston and the inner side wall of the piston hole in a surrounding mode.
Before the rear piston rod is not inserted into the piston hole, the maximum distance between the first end of the rear piston rod and the rear surface of the partition plate is equal to the thickness of the rear piston, and the distance between the two communication ports of the pipeline is equal to the maximum distance between the front surface of the rear piston and the rear surface of the partition plate.
Wherein, still be provided with a blow vent on the preceding cylinder lid, the blow vent intercommunication the inside and the outside of cylinder.
The second end of the rotor is fixedly connected with a motor shaft, and the motor shaft is arranged in the through hole of the rear cylinder cover in a sliding mode.
The motor shaft is inserted in the bearing, and the outer end of the motor shaft is arranged outside the cylinder barrel.
Wherein the stator is electrically connected with a power supply.
The scheme of the invention has the following beneficial effects:
the segmented reinforcement type linear motion device forms a two-segment linear advancing process of the linear motion device by the design and the matching of structures such as a rear piston, a rear piston rod, a partition plate and the like in a cylinder barrel, wherein the first segment is a high-speed rapid advancing stage, the second segment is a reinforcement advancing stage during force application driving, and the device also comprises a reset stroke stage of the third segment, so that the segmented reinforcement type linear motion device has the advantages of high working speed and high linear driving force;
the segmented reinforcement type linear motion device has high dynamic rigidity through the combined action of the linear motor and the air cylinder, has the buffer damping effect through the compressed air, the spring structure and the like, ensures that the compressed air circulates in each cavity, has good pneumatic transmission stability, and overcomes the defect of using a single linear motor or air cylinder.
Drawings
Fig. 1 is a sectional view of the overall structure of the present invention.
[ description of reference ]
1-a cylinder barrel; 2-front cylinder cover; 3-rear cylinder cover; 4-a separator; 5-a piston bore; 6-front piston; 7-a front piston rod; 8-rear piston; 9-rear piston rod; 10-a stator; 11-a mover; 12-a motor shaft; 13-a first cavity; 14-a second cavity; 15-a third chamber; 16-a pipeline; 17-a vent; 18-a spring device; 19-a sealing ring; 20-bearing.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a sectional reinforcement type linear motion device aiming at the problems that the prior linear motor has low dynamic rigidity, can not play a role in buffering and damping, can not be locked by self, has insufficient thrust, a single air cylinder is usually required to be matched with an air compressor and the like for use, the air pressure can be changed in the air pressure transmission process, and the stability is not high.
As shown in fig. 1, an embodiment of the present invention provides a segment reinforcement type linear motion device, including: the cylinder comprises a cylinder barrel 1, wherein a first end of the cylinder barrel 1 is provided with a front cylinder cover 2, a second end of the cylinder barrel 1 is provided with a rear cylinder cover 3, and through holes are formed in the front cylinder cover 2 and the rear cylinder cover 3; the partition plate 4 is fixedly arranged in the cylinder barrel 1, and a piston hole 5 is formed in the partition plate 4; the front piston 6 is arranged at the first end of the partition plate 4 in the cylinder barrel 1 in a sliding manner, the first end of the front piston 6 is fixedly connected with a front piston rod 7, and the front piston rod 7 is arranged in a through hole of the front cylinder cover 2 in a sliding manner; the rear piston 8 is arranged at the second end of the partition plate 4 in the cylinder barrel 1 in a sliding manner, a rear piston rod 9 is fixedly arranged at the first end of the rear piston 8, and the rear piston rod 9 is arranged corresponding to the piston hole 5; the stator 10 is arranged on the inner side wall of the cylinder barrel 1 in a surrounding mode, the stator 10 is located at the second end of the rear piston 8, the mover 11 is arranged between the stators 10, and the first end of the mover 11 is fixedly connected with the rear piston 8. The front piston 6, the partition plate 4 and the cylinder barrel 1 enclose a first cavity 13, the partition plate 4, the rear piston 8 and the cylinder barrel 1 enclose a second cavity 14, and the rear piston 8, the rear cylinder cover 3 and the cylinder barrel 1 enclose a third cavity 15; a pipeline 16 is arranged on the side wall of the cylinder barrel 1, and the pipeline 16 is communicated with the second cavity 14 and the third cavity 15 of the cylinder barrel 1.
In the sectional reinforcement type linear motion device according to the embodiment of the invention, the cylinder barrel 1 is internally provided with the front piston 6, the partition plate 4 and the rear piston 8 in sequence from front to back, wherein the partition plate 4 is fixedly arranged in the cylinder barrel 1 and cannot move, and both the front piston 6 and the rear piston 8 can slide in the cylinder barrel 1. The front piston rod 7 is arranged at the first end of the front piston 6, the second end of the front piston rod 7 is fixedly connected with the front piston 6, the first end of the front piston rod passes through the through hole of the front cylinder cover 2 and is located outside the cylinder barrel 1, the front piston rod 7 slides in the through hole of the front cylinder cover 2 along with the front and back sliding of the front piston 6, and the first end of the front piston rod 7 moves to form linear motion output. A fixed partition plate 4 is arranged between the front piston 6 and the rear piston 8, a piston hole 5 is arranged on the partition plate 4, and a rear piston rod 9 is fixedly arranged at the first end of the rear piston 8 and is matched with the piston hole 5 in size. The force transmission of the compressed air can push the front piston 6 to move forwards when the rear piston 8 moves forwards, the rear piston rod 9 does not enter the piston hole 5 in the front section stroke of the forward movement of the rear piston 8, the second cavity 14 and the first cavity 13 are in a communicated state, and the sectional areas of the rear piston 8 and the front piston 6 are equal, so that the front piston 6 can rapidly move forwards at the same speed as the rear piston 8 under the action of air pressure, and the front piston is a rapid forward movement stage of the linear motion device, namely a first stroke stage. When the rear piston rod 9 enters the piston hole 5, the communication between the second cavity 14 and the first cavity 13 is cut off, the rear piston rod 9 pushes the front piston 6 to slowly move forwards in a reinforcement manner by compressed air, the pressure increasing ratio is equal to the ratio of the sectional areas of the front piston 6 and the rear piston rod 9 according to the Pascal principle, and the linear motion device enters a reinforcement advancing stage, namely a second stroke stage.
The stator 10 of the linear motor is fixedly arranged on the inner side wall of the cylinder barrel 1 and located at the second end of the rear piston 8, the rotor 11 is arranged between the stators 10, the first end of the stator is fixedly connected with the rear piston 8 through a connecting shaft, and when the stators 10 are electrified, the rotor 11 moves forwards under the action of an electromagnetic field to drive the rear piston rod 9 and the rear piston 8 to move forwards synchronously.
When the rear piston 8 moves forward, the air in the second chamber 14 is compressed and guided into the first chamber 13 from the piston hole 5, and the front piston 6 is pushed to move forward by the air pressure, and the air pressure at the first end of the rear piston 8 is equal to the air pressure at the second end of the front piston 6. Because the first end cavity of the front piston 6 is provided with the vent 17, the gas in the cavity can gradually overflow the cylinder barrel 1, the air pressure is always consistent with the outside, and the spring device 18 is compressed. When the rear piston rod 9 enters the piston hole 5 at the second stroke stage of the linear motion device, the rear piston rod 9 blocks the piston hole 5, the pipeline 16 communicates the second cavity 14 with the third cavity 15, and the compressed air in the second cavity 14 gradually enters the third cavity 15 along the pipeline 16, so that the air pressure of the first end and the air pressure of the second end of the rear piston 8 are consistent, and the rear piston 8 moves forwards and cannot be blocked due to air pressure difference. The rear piston rod 9 then forces the front piston 6 slowly forward through the compressed air in the first chamber 13.
In a reset stroke stage after the linear motion device completes forward linear motion, namely a third stroke stage, the stator 10 is electrified reversely, so that the rotor 11 moves backwards reversely, and the rear piston rod 9 and the rear piston 8 are driven to move backwards synchronously. The air pressure in the first chamber 13 will gradually decrease and the front piston 6 will be moved back under the action of the compressed spring means 18. When the rear piston rod 9 is moved further backward and out of the piston bore 5, the first chamber 13 communicates with the second chamber 14, and the front piston 6 and the rear piston 8 will continue to move backward to the initial position, ready for the next round of forward linear motion.
The outer diameters of the front piston 6 and the rear piston 8 are equal, and the front piston 6, the rear piston 8 and the inner side wall of the cylinder barrel 1 are in clearance fit. The front piston 6 and the rear piston 8 can slide in the cylinder barrel 1 in a fitting mode, and have high stability and transmit air pressure through compressed air. In the stage of rapid forward movement of the linear motion device, because the outer diameter and the sectional area of the rear piston 8 are equal to those of the front piston 6, the front piston 6 can rapidly move forward at the same speed after the rear piston 8 is under the action of air pressure, and the characteristic of rapid working speed of the linear motion device in the first stroke stage is embodied.
Wherein, clearance fit is adopted between the rear piston rod 9 and the piston hole 5. The rear piston rod 9 is insertable into the piston bore 5 and slidable along the inside wall of the piston bore 5 to block the piston bore 5 and block the communication between the first chamber 13 and the second chamber 14 to ensure that the linear motion device transfers air pressure to the rear face of the front piston 6 through the first end of the rear piston rod 9 during energisation in the second stroke stage.
And sealing rings 19 are arranged around the outer side walls of the front piston 6, the rear piston 8 and the piston hole 5. The sealing performance of the first cavity 13 and the second cavity 14 is improved through the sealing ring 19, and the effect of air pressure force transmission is ensured.
Wherein, before the rear piston rod 9 is not inserted into the piston hole 5, the maximum distance between the first end of the rear piston rod 9 and the rear surface of the partition plate 4 is equal to the thickness of the rear piston 8, and the distance between the two communication ports of the pipeline 16 is equal to the maximum distance between the front surface of the rear piston 8 and the rear surface of the partition plate 4. When the linear motion device is in the first stroke stage, the first end of the rear piston rod 9 moves forward to be gradually close to the rear surface of the partition plate 4, and since the thickness of the rear piston 8 is equal to the maximum distance between the first end of the rear piston rod 9 and the rear surface of the partition plate 4, when the rear piston rod 9 does not enter the piston hole 5 of the partition plate 4, the side wall of the rear piston 8 blocks the communication port of the pipeline 16 positioned at the rear, so that the second cavity 14 and the first cavity 13 are communicated to form a sealed integral cavity, and the air pressure is transmitted from the front surface of the rear piston 8 to the rear surface of the front piston 6. When the linear motion device enters the second stroke stage, the rear piston rod 9 enters the piston hole 5, and at this time, the side wall of the rear piston 8 is integrally positioned in front of the communication port at the rear of the pipeline 16, so that the pipeline 16 communicates the second chamber 14 with the third chamber 15, compressed air in the second chamber 14 flows back to the third chamber 15 when the rear piston 8 moves forward continuously, the air pressure of the front surface and the air pressure of the rear surface of the rear piston 8 are kept consistent at this stage, and the air pressure difference is prevented from forming to prevent the rear piston 8 from moving forward continuously. At this time, the air pressure on the rear surface of the front piston 6 is transmitted through the first end of the rear piston rod 9 located in the piston hole 5, and the pressurization effect is generated according to the pascal principle.
The second end of the mover 11 is further fixedly connected with a motor shaft 12, the motor shaft 12 is slidably disposed in a through hole of the rear cylinder cover 3, a bearing 20 is further disposed in the through hole of the rear cylinder cover 3, the motor shaft 12 is inserted in the bearing 20, and the outer end of the motor shaft 12 is disposed outside the cylinder barrel 1. The motor shaft 12 mainly plays a guiding role, so that the mover 11, the rear piston 8 and the rear piston rod 9 move axially along the cylinder barrel 1, and the motor shaft 12 is supported and further guided by the bearing 20, so that the movement linearity and stability of the mover 11 are improved.
The stator 10 is electrically connected with a power supply, the stator 10 generates a magnetic field after being electrified, the rotor 11 is driven to do linear motion along the axial direction of the cylinder barrel 1, the stator 10 is electrified reversely, the direction of the magnetic field can be changed, the rotor 11 is driven to do reverse motion, and the stroke stage of the linear motion device is changed.
In summary, the segmented force-increasing linear motion device according to the above embodiment of the present invention forms a two-segment linear forward process of the linear motion device by a matching manner of structures such as the rear piston 8, the rear piston rod 9, and the partition plate 4 in the cylinder barrel 1, where the first segment is a fast forward stage with a higher speed, the second segment is a force-increasing forward stage during force application driving, and the device further includes a reset stroke stage of the third segment, and a segmented multi-stroke manner is adopted, so that the device has the advantages of high working speed and large driving force.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A segmented power-increasing linear motion device, comprising:
the cylinder comprises a cylinder barrel, a front cylinder cover is arranged at the first end of the cylinder barrel, a rear cylinder cover is arranged at the second end of the cylinder barrel, and through holes are formed in the front cylinder cover and the rear cylinder cover;
the partition plate is fixedly arranged in the cylinder barrel, and a piston hole is formed in the partition plate;
the front piston is arranged at the first end of the partition plate in the cylinder barrel in a sliding manner, the first end of the front piston is fixedly connected with a front piston rod, and the front piston rod is arranged in a through hole of the front cylinder cover in a sliding manner;
the rear piston is arranged at the second end of the partition plate in the cylinder barrel in a sliding manner, a rear piston rod is fixedly arranged at the first end of the rear piston, and the rear piston rod is arranged corresponding to the piston hole;
the stator is arranged on the inner side wall of the cylinder barrel in a surrounding mode, the stator is located at the second end of the rear piston, the mover is arranged between the stators, and the first end of the mover is fixedly connected with the rear piston;
the front piston, the partition plate and the cylinder barrel enclose a first cavity, the partition plate, the rear piston and the cylinder barrel enclose a second cavity, and the rear piston, the rear cylinder cover and the cylinder barrel enclose a third cavity;
a pipeline is arranged on the side wall of the cylinder barrel, before the rear piston rod is not inserted into the piston hole, the maximum distance between the first end of the rear piston rod and the rear surface of the partition plate is equal to the thickness of the rear piston, the distance between the two communication ports of the pipeline is equal to the maximum distance between the front surface of the rear piston and the rear surface of the partition plate, when the linear motion device is in the first stroke stage, the first end of the rear piston rod moves forwards to be gradually close to the rear surface of the partition plate, the side wall of the rear piston blocks the communication port behind the pipeline position, so that the second cavity and the first cavity are communicated into a sealed integral cavity, and when the linear motion device enters the second stroke stage, the rear piston rod enters the piston hole, the side wall of the rear piston is integrally positioned in front of the communicating opening behind the pipeline, and the second cavity is communicated with the third cavity through the pipeline.
2. The segment reinforcement type linear motion device according to claim 1, wherein a spring device is further arranged at the first end of the front piston, and two ends of the spring device are respectively connected with the front piston and a front cylinder cover.
3. The segment reinforcement type linear motion device according to claim 1, wherein the outer diameters of the front piston and the rear piston are equal, and the front piston and the rear piston are in clearance fit with the inner side wall of the cylinder barrel.
4. The segment-reinforced linear motion device of claim 3 wherein the rear piston rod is a clearance fit with the piston bore.
5. The segment reinforcement type linear motion device according to claim 4, wherein the front piston, the outer side wall of the rear piston and the inner side wall of the piston hole are provided with sealing rings around.
6. The segment reinforcement type linear motion device according to claim 1, wherein a vent is further provided on the front cylinder cover, and the vent communicates the inside and the outside of the cylinder tube.
7. The segment reinforcement type linear motion device according to claim 1, wherein the second end of the mover is fixedly connected with a motor shaft, and the motor shaft is slidably disposed in the through hole of the rear cylinder cover.
8. The segment reinforcement type linear motion device according to claim 7, wherein a bearing is further arranged in the through hole of the rear cylinder cover, the motor shaft is inserted into the bearing, and the outer end of the motor shaft is arranged outside the cylinder barrel.
9. The segment-reinforced linear motion device of claim 1 wherein the stator is electrically connected to a power source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910659244.3A CN110374954B (en) | 2019-07-22 | 2019-07-22 | Sectional reinforcement type linear motion device |
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| CN201910659244.3A CN110374954B (en) | 2019-07-22 | 2019-07-22 | Sectional reinforcement type linear motion device |
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| CN110374954B true CN110374954B (en) | 2020-06-30 |
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| CN111692160B (en) * | 2020-08-10 | 2022-03-29 | 常德市联嘉机械有限公司 | Locking oil cylinder structure with stroke end buffering function |
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| CN1888467A (en) * | 2006-07-19 | 2007-01-03 | 中南大学 | Hydromagnetic variable liquid adjustable damper |
| CN103252793A (en) * | 2013-05-22 | 2013-08-21 | 西南交通大学 | Robot tail end straight motion device |
| CN103982613A (en) * | 2014-05-12 | 2014-08-13 | 武汉电力设备厂 | Linear motion device for charged environment |
| CN104132109A (en) * | 2014-07-16 | 2014-11-05 | 中南大学 | Electric linear movement device |
| CN104753241A (en) * | 2015-04-01 | 2015-07-01 | 威海乐嘉轩自动化设备有限公司 | Linear motion device in combined mode |
| GB2541485B (en) * | 2016-04-14 | 2017-08-23 | Libertine Fpe Ltd | Actuator module |
| CN106586027A (en) * | 2016-12-12 | 2017-04-26 | 惠阳航空螺旋桨有限责任公司 | Reciprocating linear motion device |
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Inventor after: Zhai Zhanyu Inventor after: Chen Chao Inventor after: Shi Chen Inventor after: Yi Ruixiang Inventor after: Li Yibo Inventor after: Ran Xiangkun Inventor before: Chen Chao Inventor before: Zhai Zhanyu Inventor before: Shi Chen Inventor before: Yi Ruixiang Inventor before: Li Yibo Inventor before: Ran Xiangkun |