CN114215896A - Pneumatic gear shifting control mechanism - Google Patents
Pneumatic gear shifting control mechanism Download PDFInfo
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- CN114215896A CN114215896A CN202111503403.4A CN202111503403A CN114215896A CN 114215896 A CN114215896 A CN 114215896A CN 202111503403 A CN202111503403 A CN 202111503403A CN 114215896 A CN114215896 A CN 114215896A
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- ratchet
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- 230000007246 mechanism Effects 0.000 title claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 238000005553 drilling Methods 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/42—Ratio indicator devices
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a pneumatic gear shifting control mechanism which comprises cylinder bodies, pistons, spring seats, springs, ratchet blocks, spring pieces, ratchet anti-slip blocks and a connecting rod, wherein a notch is formed in one side wall of each cylinder body, the two cylinder bodies are arranged in parallel and at intervals in a mode that the notches in the side walls are opposite, the ratchet blocks extend out of the notches of the cylinder bodies from the interior of the pistons and are matched with the ratchet anti-slip blocks, when air pressure is applied to drive the pistons to move, the ratchet blocks and the ratchet anti-slip blocks act to realize one-way movement, and when the connecting rod is connected with a gear shifting valve of a hydraulic transmission, the hydraulic transmission can be driven to shift gears and keep gears in sequence. The control mechanism of the invention has compact structure, convenient operation and high reliability, and can be widely used in complex production environment.
Description
Technical Field
The invention belongs to the technical field of mechanical transmission and pneumatics, and particularly relates to a gear shifting control device of a hydraulic transmission.
Background
In oil drilling and production machinery, a hydraulic transmission box is widely applied, the hydraulic transmission box adopts hydraulic transmission and power gear shifting, the change of each gear is realized by a directional sequence valve (a gear shifting valve), a gear shifting operation chamber is far away from the transmission box, and in order to facilitate and accurately shift gears, a gear shifting control mechanism needs to be designed to assist an operator to accurately shift gears.
Disclosure of Invention
The invention aims to provide a pneumatic gear shifting control mechanism which is simple in structure and high in reliability and can assist an operator in gear shifting control of a device using a hydraulic transmission.
The invention is realized by the following technical scheme:
a pneumatic gear-shifting control mechanism comprises a pneumatic gear-shifting control mechanism,
the cylinder comprises cylinder bodies, wherein a gap is formed in one side wall of each cylinder body, and the two cylinder bodies are arranged in parallel at intervals in a mode that the gaps in the side walls are opposite;
the piston is connected in the cylinder body in a sliding mode, a first cavity and a second cavity are arranged inside the piston, a first opening and a second opening are formed in the surface of the piston, the first opening is communicated with the first cavity, the second opening is communicated with the second cavity, and the second opening of the piston and the notch of the cylinder body are located on the same side of the axis of the cylinder body; the first cavity and the second cavity are respectively used for matching the spring seat and the ratchet block, and the first cavity and the second cavity can be communicated or not communicated;
the spring seat is arranged in the cylinder body, and one end of the spring seat is inserted into the first cavity through the first opening;
the spring is sleeved on the surface of one end, inserted into the first cavity, of the spring seat;
the ratchet block is rotatably connected in the second cavity of the piston through a pin;
one end of the spring piece is fixedly connected in the second cavity of the piston, the other end of the spring piece is tightly attached to the surface of the ratchet block, and the acting force of the spring piece on the ratchet block enables one end of the ratchet block, which is far away from the pin, to keep a trend of rotating towards the second opening on the surface of the piston;
the ratchet anti-slip blocks are connected in the interval between the two cylinder bodies in a sliding manner, and ratchets are arranged on the surfaces of the ratchet anti-slip blocks, which correspond to the notches on the side walls of the two cylinder bodies;
the connecting rod is connected with one end of the ratchet anti-slip block;
and the airflow inlet and outlet are positioned at one end, close to the piston and far away from the spring seat, of the cylinder body.
The ratchet block is equivalent to a pawl, and the ratchet slide block is equivalent to a ratchet wheel, and the ratchet block and the ratchet wheel are matched with each other to realize the reciprocating motion of the ratchet slide block between the two cylinder bodies.
Alternatively, the pneumatic shift control mechanism further comprises,
the wiring board is positioned on one side of the ratchet anti-slip block, a gap is reserved between the wiring board and the ratchet anti-slip block, and the wiring board is made of insulating materials;
the contact screw is fixedly connected to the wiring board;
the mounting hole is positioned on the ratchet sliding block;
one end of the elastic sheet is connected to the ratchet anti-slip block, and the other end of the elastic sheet is connected with the contact;
the contact comprises a contact head and a sliding rod, the contact head is connected with the spring piece and is positioned in a gap between the wiring board and the ratchet slide block, and the sliding rod is connected in a mounting hole of the ratchet slide block in a sliding mode.
Alternatively, the contact screw includes a contact portion and a connection portion, the contact portion of the contact screw penetrates through the wiring board, the contact portion is located on one side of the wiring board close to the ratchet slide block, the connection portion is located on one side of the wiring board far away from the ratchet slide block, and the connection portion is in threaded connection with the nut.
Alternatively, the contact screws are distributed on the wiring board at intervals along a straight line, the number of the contacts is two, and the vertical projection of the two contacts on the wiring board is positioned on the straight line where the contact screws are positioned.
Alternatively, the pneumatic gear shifting control mechanism further comprises an end cover, a housing, a side plate and a supporting cover plate, wherein the end cover, the housing, the side plate and the supporting cover plate form a closed shell to encapsulate the two cylinder bodies, the wiring board and the ratchet anti-slip block inside, the housing is located above the wiring board, the side plate is located below the ratchet anti-slip block, the end cover and the supporting cover plate are respectively located at two ends of the cylinder bodies, interfaces corresponding to the airflow inlet and outlet are respectively arranged on the end cover and the supporting cover plate, and a through hole matched with the connecting rod is further formed in the supporting cover plate.
Alternatively, an O-shaped ring is arranged on the surface of the piston close to one end of the airflow inlet and outlet, and a sealing structure is formed between the O-shaped ring and the cylinder body.
Alternatively, the spring seat comprises a seat body with the outer diameter equal to the inner diameter of the cylinder body and an insertion section with the outer diameter less than or equal to the minimum inner diameter of the first cavity in the piston, and the spring is sleeved on the surface of the insertion section.
Alternatively, a first ring groove is formed in the inner wall of the first cavity in the piston, and one end of the spring is tightly attached to the end face of the first ring groove.
The oil drilling and production device comprises a hydraulic transmission, a shift valve and the pneumatic shift control mechanism, wherein a connecting rod in the pneumatic shift control mechanism is connected with the shift valve, and when an airflow inlet and an airflow outlet corresponding to a cylinder body in the pneumatic shift control mechanism are used for air intake or exhaust, the shift valve drives the hydraulic transmission to realize sequential switching from reverse gear to forward gear highest gear or from the forward gear highest gear to reverse gear.
The utility model provides an oil drilling and production device, includes hydraulic transmission and gear shift valve, still includes aforementioned pneumatic gear shift control mechanism, connect pole and gear shift valve in the pneumatic gear shift control mechanism and link to each other, contact screw in the pneumatic gear shift control mechanism is connected with fender position display device electricity, and when the air current import and export that cylinder body corresponds among the pneumatic gear shift control mechanism admits air or exhaust, gear shift valve drive hydraulic transmission realizes shifting from reversing to the highest fender position of the fender position of advancing or the highest fender position of the fender position of advancing to reversing, and fender position display device shows the fender position that current hydraulic transmission locates simultaneously.
Compared with the prior art, the invention has the following characteristics: the pneumatic control mechanism controls a directional sequence valve (a gear shifting valve) to realize a power gear shifting function, and realizes gear shifting and gear keeping by utilizing the one-way motion principle of ratchet wheels and ratchet teeth in the control process. The control mechanism of the invention has compact structure, convenient operation and high reliability, and can be widely used in complex production environment.
Drawings
FIG. 1 is a schematic diagram of a pneumatic shift control mechanism;
FIG. 2 is a cross-sectional schematic view of the pneumatic shift control mechanism C-C of FIG. 1;
in the figure: 1-end cover, 2-wiring board, 3-cover, 4-contact screw, 5-elastic piece, 6-contact, 7-nut, 8-extension rod, 9-side plate, 10-supporting cover plate, 11-O-shaped ring, 12-piston, 13-spring piece, 14-ratchet block, 15-ratchet anti-slip block, 16-spring, 17-spring seat, 18-cylinder body and 19-pin.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made based on the common technical knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.
As shown in fig. 1 and 2, the pneumatic shift control mechanism is a schematic structural diagram, and mainly comprises a cylinder 18, a ratchet stopper 15, a connecting rod 8, an elastic piece 5, a contact 6, a piston 12, a spring piece 13, a ratchet piece 14, a pin 19, a terminal plate 2, a contact screw 4, a bolt, a nut 7, a spring 16, a spring seat 17, an end cover 1, a support cover plate 10, a side plate 9, a housing 3, an O-ring 11, and the like. The pneumatic gear shifting control mechanism controls the gear shifting sequence and the gear shifting direction of the hydraulic transmission gear shifting valve according to the principle that the hydraulic transmission gear box shifts gears in a certain sequence, so that remote control gear shifting is realized. In fig. 1, two cylinders 18 are arranged in parallel at intervals, the motion directions of the pistons 12 are opposite, the side walls of the cylinders 18 are provided with notches, the ratchet blocks 14 extend out of the notches during motion, parts arranged in the two cylinders 18 are identical and are in a centrosymmetric state, the O-shaped rings 11 are used for sealing gas between the pistons 12 and the cylinders 18, and the wiring board 2 is an insulating board.
The pneumatic gear shifting control mechanism specifically comprises an end cover 1, a wiring board 2, a housing 3, 8 contact screws 4, an elastic sheet 5, 2 contacts 6, 16 nuts 7, a connecting rod 8, a side plate 9, a supporting cover plate 10, 2O- shaped rings 11, 2 pistons 12, 2 spring sheets 13, 2 ratchet blocks 14, a ratchet stopping block 15, 2 springs 16, 2 spring seats 17, 2 cylinder bodies 18 and 2 pins 19.
As shown in fig. 1,1 spring plate 13, 1 ratchet block 14, 1O- ring 11 and 1 pin 19 are assembled with 1 piston 12 into a whole, the spring plate 13 is connected with the piston 12 by a screw, the ratchet block 14 is connected with the piston 12 by a pin 19, the length of the ratchet block 14 is enough that the tail end of the ratchet block can extend out of an opening of the piston 12 and a gap of a cylinder body 18 and can act with a ratchet on a ratchet block 15, the installation position and the elasticity of the spring plate 13 can ensure that the ratchet block 14 is kept engaged with the ratchet on the ratchet block 15, and then the piston assembly is installed in the cylinder body 18 as required; mounting 1 spring 16 and 1 spring seat 17 at the other end of the cylinder 18; assembling a ratchet anti-slip block 15, an elastic piece 5, 2 contacts 6 and a connecting rod 8 into a whole, connecting the ratchet anti-slip block 15 with the elastic piece 5 by using a screw, connecting the ratchet anti-slip block 15 with the connecting rod 8 by using a thread, and matching the ratchet anti-slip block 15, the elastic piece 5 and the 2 contacts 6 by using a clearance fit, wherein the ratchet anti-slip block, the ratchet anti-slip block and the elastic piece can move linearly together (as shown in figure 2, the contacts 6 are connected in a mounting hole on the ratchet anti-slip block 15 in a sliding way, and the mounting hole plays a linear guide role), and assembling the ratchet anti-slip block 15 and other components in an interval between two cylinder bodies 18; an end cover 1 is arranged at one end of a cylinder body 18, a supporting cover plate 10 is arranged at the other end of the cylinder body 18, and a side plate 9 is arranged on one side surface of the cylinder body 18; the terminal block 2, 16 nuts 7, 8 contact screws 4 are assembled into a whole and mounted on the other side of the cylinder block 18, and finally the housing 3 is mounted.
As shown in FIG. 1, the length of the ratchet block 14 is designed to satisfy the following two conditions:
when the ratchet block 14 moves to the position of the notch of the cylinder 18 along with the piston 12, the spring plate 13 drives the end of the ratchet block 14 away from the pin 19 to rotate and extend out of the second opening of the piston 12 and the notch of the cylinder 18, and then directly contact the ratchet teeth on the surface of the ratchet block 15. The second opening in the piston 12 is required to ensure that it does not interfere with the rotating ratchet piece 14, and at the same time, to avoid interference with the movement of the spring seat 17.
When the ratchet block 14 is located at the initial position, i.e. when the first connector B (or the second connector a) is not vented (or after venting), the end surface of the piston 12 is tightly attached to the end cap 1 or the support cover plate 10, and the end of the ratchet block 14 away from the pin 19 cannot contact with the ratchet teeth on the surface of the ratchet block 15.
Referring to fig. 1, one end of the cylinder 18 close to the piston 12 is an airflow inlet/outlet, and the end cover 1 and the support cover plate 10 corresponding to the airflow inlet/outlet are respectively provided with a first interface B and a second interface a, which are respectively communicated with an air source. Air pressure with certain pressure is introduced from the second connector A or the first connector B respectively to push the piston 12 to move in the cylinder body 18 and drive the ratchet anti-slip block 15 and the connecting rod 8 to move, so that the corresponding gear shifting mechanism is driven to shift gears.
As shown in fig. 2, the contact screw 4 is connected to a 24V voltage and connected to a corresponding gear indicator (at this time, the contact screw 4 and the contact 6 are connected, the two contacts 6 are designed to be adjusted in two directions of up-shift and down-shift, the distance between the two contacts 6 ensures that when one contact 6 is connected to the contact screw 4, the other contact 6 is in contact with the wiring board 2 made of insulating material, the end of the contact 6 located in the ratchet slide block 15, i.e. the slide rod in the mounting hole on the ratchet slide block 15 in fig. 2, can be used as a terminal, so that the contact screw 4, the contact 6 and the gear indicator form a loop, of course, the conductive elastic piece 5 can also be used as a terminal, i.e. the mounting screw position of the elastic piece 5 in fig. 2), and the gear located by the hydraulic transmission can be known.
The pneumatic gear-shifting control mechanism can be applied to oil drilling and production equipment to assist a hydraulic transmission equipped for the oil drilling and production equipment to perform gear-shifting control, the spring piece 13, the ratchet block 14 and the pin 19 are arranged in a cavity of the piston 12, then the piston 12, the spring 16 and the spring seat 17 are arranged in the cylinder body 18 according to certain requirements, the ratchet anti-slip block 15 and the connecting rod 8 are arranged at a gap between the two cylinder bodies 18, two ends of the cylinder body 18 are connected with the supporting cover plate 10 through the end cover 1, two side faces are connected with the housing 3 through the side plate 9, gas with certain pressure is respectively introduced from interfaces at two ends of the end cover 1 and the supporting cover plate 10 to push the piston 12 to move in the cylinder body 18 and drive the ratchet anti-slip block 15 and the connecting rod 8 to move, so that the corresponding gear-shifting mechanism is driven to perform gear-shifting. The pneumatic gear shifting control mechanism is simple and compact in structure, good in manufacturability and high in reliability.
As shown in fig. 1, a gas with a certain pressure is introduced from the second port a to push the piston 12 to move left in the cylinder 18, and drive the spring plate 13 and the ratchet block 14 to move left together, the ratchet block 14 extends from the notch on the cylinder 18 under the action of the spring plate 13 and contacts with a ratchet on the ratchet slide block 15 to push the ratchet slide block 15, the elastic plate 5, the 2 contacts 6, and the connecting rod 8 to move left together (at this time, the ratchet block 14 in the piston 12 corresponding to the first port B is located at the initial position, and does not contact with the ratchet block 15 and cannot block the ratchet slide block 15 from moving left), and the connecting rod 8 drives the shift valve on the hydraulic transmission to move in a specific direction, so as to shift the hydraulic transmission, after the gas pressure is removed, the spring plate 13, the ratchet block 14, the O-ring 11, and the piston 12 return to the right end under the action of the left end spring 16, the ratchet block 15, The elastic sheet 5, the 2 contacts 6 and the connecting rod 8 are still at a certain position and still do not move, so that the shift valve on the hydraulic transmission is ensured to be at a certain corresponding position and still move (when the second connector A is decompressed, the piston 12 returns to the right under the action of the spring 16, the ratchet block 14 is quickly separated from the surface of the ratchet slide block 15, the ratchet slide block 15 cannot be pushed to move greatly even if short-term friction contact exists, at the moment, the two ends of the ratchet slide block 15 are not subjected to external force action (air at the two ends of the ratchet slide block 15 is not sealed and isolated and is communicated), so that the ratchet slide block 5 can be considered to be stopped at the original position and keep still, as an option, a locking mechanism can be added to the ratchet slide block 15, the locking mechanism is arranged on the externally-connected connecting rod 8, so that the position of the ratchet block 15 and the ratchet block 14 is kept more stable after being separated, thereby ensuring that the hydraulic transmission works at a certain specific gear, every time when the hydraulic shifter is switched on, the hydraulic shifter is switched from a reverse gear to a sixth gear, namely 8 gears, by switching on seven times.
As shown in fig. 1, a gas with a certain pressure is introduced from the first port B to push the piston 12 in the other cylinder 18 to move right in the cylinder and drive the spring plate 13 and the ratchet block 14 to move right together, the ratchet block 14 extends out of the notch on the cylinder 18 under the action of the spring plate 13 and contacts with a tooth on the ratchet slide block 15 to push the ratchet slide block 15, the elastic plate 5, the 2 contacts 6 and the connecting rod 8 to move right together (at this time, the ratchet block 14 in the piston 12 corresponding to the second port a is at the initial position, and does not contact with the ratchet slide block 15 and cannot block the ratchet slide block 15 from moving right), the connecting rod 8 drives the shift valve on the hydraulic transmission to move to the other direction, so as to shift the hydraulic transmission, after the gas pressure is removed, the spring plate 13, the ratchet block 14, the O-ring 11 and the spring 16 at the right end of the piston 12 return to the left end, the ratchet block 15, The elastic sheet 5, the 2 contacts 6 and the connecting rod 8 are still in a certain position and are still fixed, and a gear shifting valve on the hydraulic transmission is guaranteed to be in a certain corresponding position and is fixed, so that the hydraulic transmission is guaranteed to work in a certain specific gear, gear shifting is achieved once when air is supplied once, and the hydraulic transmission is changed from six gears to 8 reverse gears in total by seven times of air.
Every time the gear is shifted, 2 contact terminals 6 connected with the ratchet sliding block 15 and the elastic sheet 5 are alternately contacted with 8 contact screws 4 respectively, so that a gear display circuit is switched on, the gear of the hydraulic transmission can be known from the gear display, and the remote control is realized.
Claims (10)
1. A pneumatic gear-shifting control mechanism is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the cylinder body (18), a gap is opened on one side wall of the cylinder body (18), and the two cylinder bodies (18) are arranged in parallel and at intervals according to the mode that the gaps on the side walls are opposite;
the piston (12) is connected in the cylinder body (18) in a sliding mode, a first cavity and a second cavity are arranged inside the piston (12), a first opening and a second opening are formed in the surface of the piston (12), the first opening is communicated with the first cavity, the second opening is communicated with the second cavity, and the second opening of the piston (12) and a gap of the cylinder body (18) are located on the same side of the axis of the cylinder body (18);
the spring seat (17) is arranged in the cylinder body (18), and one end of the spring seat (17) is inserted into the first cavity through the first opening;
the spring (16) is sleeved on the surface of one end, inserted into the first cavity, of the spring seat (17);
a ratchet block (14), wherein the ratchet block (14) is rotatably connected in the second cavity of the piston (12) through a pin (19);
one end of the spring piece (13) is fixedly connected in the second cavity of the piston (12), the other end of the spring piece (13) is tightly attached to the surface of the ratchet block (14), and the acting force of the spring piece (13) on the ratchet block (14) enables one end of the ratchet block (14) far away from the pin (19) to keep the trend of rotating towards the second opening of the surface of the piston (12);
the ratchet limiting blocks (15) are connected in the interval between the two cylinder bodies (18) in a sliding manner, and ratchets are arranged on the surfaces of the ratchet limiting blocks (15) corresponding to the notches on the side walls of the two cylinder bodies (18);
the connecting rod (8), the connecting rod (8) is connected with one end of the ratchet anti-slip block (15);
and the airflow inlet and outlet are positioned at one end, close to the piston (12) and far away from the spring seat (17), of the cylinder body (18).
2. A pneumatic shift control mechanism according to claim 1, wherein: also comprises the following steps of (1) preparing,
the wiring board (2) is positioned on one side of the ratchet sliding block (15), a gap is reserved between the wiring board (2) and the ratchet sliding block (15), and the wiring board (2) is made of an insulating material;
the contact screw (4), the said contact screw (4) is fixedly connected to the terminal board (2);
a mounting hole located on the ratchet stopper (15);
one end of the elastic sheet (5) is connected to the ratchet anti-slip block (15), and the other end of the elastic sheet (5) is connected with the contact (6);
the contact (6) comprises a contact head and a sliding rod, the contact head is connected with the spring piece (5) and is positioned in a gap between the wiring board (2) and the ratchet sliding block (15), and the sliding rod is connected in a mounting hole of the ratchet sliding block (15) in a sliding mode.
3. A pneumatic shift control mechanism according to claim 2, wherein: the contact screw (4) comprises a contact part and a connecting part, the contact screw (4) penetrates through the wiring board (2), the contact part is located on one side, close to the ratchet anti-slip block (15), of the wiring board (2), the connecting part is located on one side, far away from the ratchet anti-slip block (15), of the wiring board (2), and the connecting part is in threaded connection with the nut (7).
4. A pneumatic shift control mechanism according to claim 2, wherein: the contact screws (4) are distributed on the wiring board (2) at intervals along a straight line, the number of the contacts (6) is two, and the vertical projections of the two contacts (6) on the wiring board (2) are located on the straight line where the contact screws (4) are located.
5. A pneumatic shift control mechanism according to claim 1, wherein: the novel cylinder is characterized by further comprising an end cover (1), a housing (3), a side plate (9) and a supporting cover plate (10), wherein the end cover (1), the housing (3), the side plate (9) and the supporting cover plate (10) form a closed shell to encapsulate the cylinder body (18), the wiring board (2) and the ratchet anti-slip block (15) inside, the housing (3) is located above the wiring board (2), the side plate (9) is located below the ratchet anti-slip block (15), the end cover (1) and the supporting cover plate (10) are respectively located at two ends of the cylinder body (18), interfaces corresponding to an airflow inlet and an airflow outlet are respectively formed in the end cover (1) and the supporting cover plate (10), and a through hole matched with the connecting rod (8) is further formed in the supporting cover plate (10).
6. A pneumatic shift control mechanism according to claim 1, wherein: an O-shaped ring (11) is arranged on the surface of one end, close to the air flow inlet and outlet, of the piston (12), and a sealing structure is formed between the O-shaped ring (11) and the cylinder body (18).
7. A pneumatic shift control mechanism according to claim 1, wherein: the spring seat (17) comprises a seat body with the outer diameter equal to the inner diameter of the cylinder body (18) and an insertion section with the outer diameter smaller than or equal to the minimum inner diameter of the first cavity in the piston (12), and the spring (16) is sleeved on the surface of the insertion section.
8. A pneumatic shift control mechanism according to claim 7, wherein: a first annular groove is formed in the inner wall of a first cavity in the piston (12), and one end of the spring (16) is tightly attached to the end face of the first annular groove.
9. An oil drilling and production device comprises a hydraulic transmission and a gear shifting valve, and is characterized in that: the pneumatic gear-shifting control mechanism of claim 1, further comprising a connecting rod (8) connected to a gear shifting valve, wherein the gear shifting valve drives the hydraulic transmission to realize sequential shifting from reverse gear to the highest forward gear or vice versa when an air inlet or an air outlet corresponding to the cylinder (18) in the pneumatic gear-shifting control mechanism is filled or exhausted.
10. An oil drilling and production device comprises a hydraulic transmission and a gear shifting valve, and is characterized in that: the pneumatic gear-shifting control mechanism of claim 2, wherein a connecting rod (8) of the pneumatic gear-shifting control mechanism is connected with a gear shifting valve, a contact screw (4) of the pneumatic gear-shifting control mechanism is electrically connected with a gear display device, when an air flow inlet and an air flow outlet corresponding to a cylinder body (18) of the pneumatic gear-shifting control mechanism are filled with air or exhausted air, the gear shifting valve drives the hydraulic transmission to realize sequential switching from reverse gear to the highest gear of forward gear or from the highest gear of forward gear to reverse gear, and simultaneously, the gear display device displays the gear of the current hydraulic transmission.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111503403.4A CN114215896A (en) | 2021-12-09 | 2021-12-09 | Pneumatic gear shifting control mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111503403.4A CN114215896A (en) | 2021-12-09 | 2021-12-09 | Pneumatic gear shifting control mechanism |
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| CN114215896A true CN114215896A (en) | 2022-03-22 |
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| CN202111503403.4A Pending CN114215896A (en) | 2021-12-09 | 2021-12-09 | Pneumatic gear shifting control mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116123281A (en) * | 2022-12-17 | 2023-05-16 | 陕西法士特齿轮有限责任公司 | Gear shifting cylinder assembly with unidirectional on-off functional component |
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| DE19939201A1 (en) * | 1999-08-18 | 2001-02-22 | Porsche Ag | Motor vehicle gear change system holds piston in centered stabilized position by compression spring with bearings both ends to re-set piston to center. |
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