CN210799545U - Hydraulic driving system capable of enabling multiple oil cylinders to perform high-precision synchronous motion - Google Patents
Hydraulic driving system capable of enabling multiple oil cylinders to perform high-precision synchronous motion Download PDFInfo
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- CN210799545U CN210799545U CN201921535645.XU CN201921535645U CN210799545U CN 210799545 U CN210799545 U CN 210799545U CN 201921535645 U CN201921535645 U CN 201921535645U CN 210799545 U CN210799545 U CN 210799545U
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Abstract
Can let a plurality of hydro-cylinders carry out high accuracy simultaneous movement's hydraulic drive system, including the synchronous booster of high pressure and the synchronous booster of low pressure, the synchronous booster of high pressure includes left piston rod, right piston rod and cylinder body, the cover is equipped with left pressure spring on the piston rod of a left side, left pressure spring's left end top is at the right-hand member of left spring holder, the middle part of left spring holder is equipped with left through-hole, the left end of left piston rod is equipped with left nut, the right-hand member face of left nut cooperatees with the left end face of left spring holder, near edge of left spring holder is equipped with a plurality of left guiding locating holes with encircleing, every left guiding locating hole on the left spring holder adopts clearance fit cartridge respectively to have a left guide bar, the left. The hydraulic driving system is high in movement precision, low in failure rate, stable and reliable in working performance, and capable of rapidly and accurately driving load elements and enabling a plurality of oil cylinders to perform high-precision synchronous movement.
Description
Technical Field
The utility model relates to a can let a plurality of hydro-cylinders carry out high accuracy synchronous motion's hydraulic drive system.
Background
The hydraulic drive has the advantages of small volume, light weight, large driving force, suitability for heavy-load direct drive, wide speed regulation range, various speed control modes and the like, and therefore, the hydraulic drive system is widely applied to a plurality of mechanical devices, such as various hydraulically-driven lifting platforms, various parts which move by utilizing the hydraulic drive and the like. However, the conventional hydraulic driving devices do not have a function of outputting a plurality of equal pressure and equal flow hydraulic oil to the outside with high precision, and some of the conventional hydraulically driven elevating platforms and parts moving by hydraulic driving need to use a plurality of cylinders to drive a load synchronously with high precision, that is, the conventional oil pumps need to have a function of moving synchronously with high precision, but because the conventional various oil pumps do not have such a function, for example, for the hydraulically driven elevating platform, two or four cylinders driving the elevating platform need to move synchronously with high precision, which requires that equal pressure and equal amount of hydraulic oil be respectively injected into working chambers of two or four cylinders driving the elevating platform, the conventional oil pumps and other devices do not have a function of injecting equal pressure and equal amount of hydraulic oil into working chambers of two or four cylinders driving the elevating platform, this results in the associated equipment not being able to operate with hydraulic drives, which also makes existing hydraulic drives impractical for many applications where synchronous motion with high precision is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can pour into equal pressure, equivalent hydraulic oil into respectively in the working chamber of a plurality of hydro-cylinders, let a plurality of hydro-cylinders carry out high accuracy synchronous motion, and then can realize carrying out high accuracy driven hydraulic drive system that can let a plurality of hydro-cylinders carry out high accuracy synchronous motion to load element.
The utility model discloses a can let a plurality of hydro-cylinders carry out high accuracy synchronous motion's hydraulic drive system, including high-pressure synchronous booster and low pressure synchronous booster, high-pressure synchronous booster includes the pneumatic cylinder body that sets up along the front and back horizontal direction, is equipped with pneumatic piston in the pneumatic cylinder body, and the pneumatic cylinder body is internal to be located the rear of pneumatic piston and is equipped with pneumatic pressure boost chamber, is equipped with the air inlet on the wall in pneumatic pressure boost chamber, and the pneumatic cylinder body is internal to be located the front of pneumatic piston and is equipped with preceding cavity, is equipped with the scavenge port that communicates with the external atmosphere on the wall of preceding;
the front end of the pneumatic cylinder body is provided with a plunger cylinder seat, the rear end of the pneumatic cylinder body is provided with a rear end cover, the plunger cylinder seat is provided with a plurality of plunger cylinder mounting holes in parallel, the axes of the plunger cylinder mounting holes are respectively positioned in the front-rear horizontal direction, and a plunger pressurizing cylinder is respectively arranged at each plunger cylinder mounting hole;
a reset pressure spring is arranged in the front cavity, the rear end of the reset pressure spring is propped against the front end surface of the pneumatic piston, and the front end of the reset pressure spring is propped against the rear end surface of the plunger cylinder seat;
each plunger pressure cylinder comprises a pressure cylinder body arranged along the front-back horizontal direction, a pressure oil cavity is arranged in each pressure cylinder body, an oil inlet is arranged at the rear end of each pressure oil cavity, an oil outlet is arranged at the front end of each pressure oil cavity, a pressure plunger is inserted in each pressure oil cavity, the structural sizes of the pressure plungers are the same, the rear end of each pressure plunger is fixedly connected with a pneumatic piston, when the pneumatic piston is positioned at the rear part of the pneumatic pressure cavity, the front end of each pressure plunger is positioned at the rear end of the corresponding pressure oil cavity, and when the pneumatic piston is positioned at the front part of the pneumatic pressure cavity, the front end of each pressure plunger is positioned at the middle part or the front end of the corresponding pressure oil cavity;
the oil outlet of each pressurizing oil cavity is communicated with the lower working cavity of one synchronous working oil cylinder through a synchronous oil pipeline, and the upper working cavity of each synchronous working oil cylinder is communicated with a pressure air source or external atmosphere through a return air channel which is connected with an electromagnetic valve in series;
the low-pressure synchronous supercharger comprises a plurality of low-pressure cylinder bodies arranged in the front-back horizontal direction, the number of the low-pressure cylinder bodies is the same as that of the plunger supercharging cylinders, a low-pressure pneumatic piston is arranged in each low-pressure cylinder body, a low-pressure pneumatic pressurizing cavity is arranged behind the low-pressure pneumatic piston in each low-pressure cylinder body, a low-pressure air inlet is formed in the wall of the low-pressure pneumatic pressurizing cavity, a low-pressure front cavity is formed in the front of the low-pressure pneumatic piston in each low-pressure cylinder body, a scavenging port is formed in the wall of the low-pressure front cavity, and the scavenging port is communicated with a pressure;
each low-pressure air inlet is communicated with a pressure air source or external atmosphere through an air path which is connected with an electromagnetic valve in series;
the front end of each low-pressure cylinder body is respectively provided with a low-pressure plunger cylinder seat, the rear end of each low-pressure cylinder body is respectively provided with a rear cover, each low-pressure plunger cylinder seat is respectively provided with a low-pressure plunger cylinder mounting hole, the axis of each low-pressure plunger cylinder mounting hole is respectively positioned in the front-rear horizontal direction, and a low-pressure plunger pressure cylinder is respectively arranged at each low-pressure plunger cylinder mounting hole;
each low-pressure plunger piston pressure cylinder comprises a low-pressure cylinder body arranged along the front-rear horizontal direction, a low-pressure oil cavity is arranged in each low-pressure cylinder body, the rear end of each low-pressure oil cavity is provided with a low-pressure oil inlet, the front end of each low-pressure oil cavity is provided with a low-pressure oil outlet, a low-pressure plunger piston is inserted in each low-pressure oil cavity, the structural sizes of the low-pressure plunger pistons are the same, and the rear end of each low-pressure plunger piston is fixedly connected with a low-pressure pneumatic piston positioned at the rear end of the low-pressure plunger piston, when the low-pressure pneumatic piston is positioned at the rear part in the low-pressure pneumatic pressurizing cavity, the front end of each low-pressure pressurizing plunger is respectively positioned at the rear end of the corresponding low-pressure pressurizing oil cavity, when the low-pressure pneumatic piston is positioned at the front part in the low-pressure pneumatic pressurizing cavity, the front end of each low-pressure pressurizing plunger is respectively positioned at the middle part or the front end of the corresponding low-pressure pressurizing oil cavity;
each low-pressure pneumatic piston is fixedly connected with the front end of one synchronous positioning rod, the axis of each synchronous positioning rod is positioned in the front-back horizontal direction, each synchronous positioning rod extends backwards through the corresponding rear cover along the front-back horizontal direction, and each synchronous positioning rod is fixedly connected with the corresponding synchronous positioning plate;
and when the low-pressure pneumatic piston moves forwards away from the rear end surface in the low-pressure pneumatic pressurizing cavity, the low-pressure oil inlet of each low-pressure pressurizing oil cavity is respectively blocked by the corresponding low-pressure pneumatic piston, and the upper part of the oil supplementing cylinder is communicated with a pressure air source or the outside atmosphere through a pressure air passage which is connected with an electromagnetic valve in series.
Preferably, the front part of the pressurizing cylinder body is provided with an exhaust hole, the inner end of the exhaust hole is communicated with the pressurizing oil cavity, and a plug is screwed at the exhaust hole.
Preferably, the oil outlet is provided with a pipe joint, and the number of the plunger pressure cylinders and the number of the low-pressure plunger pressure cylinders are 2-8.
Preferably, the rear end of the pressurizing plunger axially penetrates through a through hole in the pneumatic piston by adopting clearance fit, and a fixing nut is screwed at the rear end of the pressurizing plunger, which is positioned on the pneumatic piston.
Preferably, the middle part of the outer side wall of the plunger cylinder seat is provided with a flange, and the flange is fixedly connected with the rear end cover through a plurality of connecting pull rods.
Preferably, the pressurizing cylinder body comprises a pressurizing cylinder barrel with a circular cross section, the oil outlet is located in the middle of the front end face of the pressurizing cylinder barrel, the rear end of the pressurizing cylinder barrel abuts against the front end face of the guide sleeve, the rear end of the guide sleeve abuts against the front end face of the seal sleeve, the pressurizing plunger can sequentially penetrate through the seal sleeve and the guide sleeve from back to front and then is inserted into the pressurizing cylinder barrel, a rear seal ring is arranged between the pressurizing plunger and the seal sleeve, a front seal ring is arranged between the pressurizing plunger and the guide sleeve, the seal sleeve is inserted and fixed at the rear part in the plunger cylinder mounting hole, the guide sleeve is inserted and fixed in the middle of the plunger cylinder mounting hole, and the middle-rear part of the pressurizing cylinder barrel is inserted.
Preferably, the middle rear part of the pressurizing cylinder barrel is fixed in the plunger cylinder mounting hole through threaded connection.
Preferably, the low-pressure boosting cylinder body comprises a low-pressure boosting cylinder barrel with a circular cross section, the low-pressure oil outlet is located at the front end of the low-pressure boosting cylinder barrel, a sealing cover is inserted at the front end of the low-pressure boosting cylinder barrel, the rear end of the low-pressure boosting cylinder barrel is sleeved on a low-pressure guide sleeve barrel seat, the low-pressure guide sleeve barrel seat is fixed on a low-pressure plunger cylinder barrel seat, a low-pressure sealing sleeve is inserted in a low-pressure plunger cylinder mounting hole in the low-pressure plunger cylinder barrel seat, the low-pressure boosting plunger can sequentially penetrate through the low-pressure sealing sleeve barrel and the low-pressure guide sleeve barrel seat from back to front and then is inserted into the low-pressure boosting cylinder barrel, a low-pressure rear sealing ring is arranged between the low-.
The hydraulic driving system which can make a plurality of oil cylinders carry out high-precision synchronous motion can input pressure gas into the low-pressure pneumatic pressurizing cavity through each low-pressure air inlet when the load needs to be quickly pushed, push all low-pressure pneumatic pistons and all low-pressure pressurizing plungers to move forward, and make the hydraulic oil in each low-pressure pressurizing oil cavity convey the hydraulic oil into the corresponding pressurizing oil cavity of the high-pressure synchronous pressurizer through the corresponding low-pressure oil outlet, the low-pressure oil conveying pipeline and the oil inlet at the rear end of the pressurizing oil cavity, and then convey the hydraulic oil into the lower working cavity of each synchronous working oil cylinder through the oil outlet of each pressurizing oil cavity and the corresponding synchronous oil conveying pipeline respectively, because the structural sizes of each low-pressure pressurizing plunger are the same, each low-pressure pneumatic piston is fixedly connected with the front end of a synchronous positioning rod respectively, the axis of each synchronous positioning rod is respectively positioned in the front and rear horizontal directions, each synchronous positioning rod respectively extends backwards through the corresponding rear cover along the front and rear horizontal directions, and each synchronous positioning rod is fixedly connected through a synchronous positioning plate, so that multiple equivalent low-pressure power hydraulic oil can be accurately output, and therefore, equal-pressure and equivalent hydraulic oil can be respectively injected into the lower working chambers of the multiple synchronous working oil cylinders, the multiple synchronous working oil cylinders can perform high-precision synchronous motion, and further, high-precision driving on a load element can be realized; when a load needs to be pushed by high-pressure hydraulic oil, pressure gas can be input into the pneumatic pressurizing cavity to push the pneumatic piston to move forwards, and because the sectional area of the pneumatic piston is larger than the sum of the sectional areas of all the pressurizing plungers, when the pressurizing plungers are inserted into the corresponding pressurizing oil cavities, the pressure of the hydraulic oil in the corresponding pressurizing oil cavities is larger than the pressure of the gas in the pneumatic pressurizing cavities, so that the pressurizing effect that the pressure of the hydraulic oil output from the pressurizing oil cavities to the outside is larger than the pressure of the gas input into the pneumatic pressurizing cavities can be realized, and because the structural sizes of the pressurizing plungers are the same, a plurality of equal-quantity high-pressure power hydraulic oil can be accurately output. Therefore, the utility model discloses a can let a plurality of hydro-cylinders carry out high accuracy synchronous motion's hydraulic drive system can pour into equal pressure, equivalent hydraulic oil respectively in the working chamber of a plurality of hydro-cylinders, let a plurality of hydro-cylinders carry out high accuracy synchronous motion, and then can realize carrying out the high accuracy drive to load element.
The present invention will be further explained with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic drive system capable of allowing a plurality of oil cylinders to perform high-precision synchronous motion according to the present invention;
FIG. 2 is a partially enlarged front sectional view of the high-pressure synchronous supercharger of the present invention;
fig. 3 is a partially enlarged front sectional view of the low-pressure synchronous supercharger of the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, the hydraulic driving system of the present invention for allowing a plurality of oil cylinders to perform high precision synchronous motion comprises a high pressure synchronous supercharger and a low pressure synchronous supercharger, wherein the high pressure synchronous supercharger comprises a pneumatic cylinder body 1 arranged along the front and rear horizontal directions, a pneumatic piston 2 is arranged in the pneumatic cylinder body 1, a pneumatic pressurizing cavity 3 is arranged at the rear of the pneumatic piston 2 in the pneumatic cylinder body 1, an air inlet 4 is arranged on the wall of the pneumatic pressurizing cavity 3, a front cavity 5 is arranged in front of the pneumatic piston 2 in the pneumatic cylinder body 1, and a ventilation port communicated with the external atmosphere is arranged on the wall of the front cavity 5;
the front end of the pneumatic cylinder body 1 is provided with a plunger cylinder seat 7, the rear end of the pneumatic cylinder body 1 is provided with a rear end cover 9, the plunger cylinder seat 7 is provided with a plurality of plunger cylinder mounting holes 8 in parallel, the axes of the plunger cylinder mounting holes 8 are respectively positioned in the front-rear horizontal direction, and a plunger pressure cylinder is respectively arranged at each plunger cylinder mounting hole 8;
a reset pressure spring 14 is arranged in the front cavity 5, the rear end of the reset pressure spring 14 is propped against the front end surface of the pneumatic piston 2, and the front end of the reset pressure spring 14 is propped against the rear end surface of the plunger cylinder seat 7;
each plunger pressurizing cylinder comprises a pressurizing cylinder body arranged along the front-back horizontal direction, a pressurizing oil cavity 10 is arranged in each pressurizing cylinder body, an oil inlet 12 is arranged at the rear end of each pressurizing oil cavity 10, an oil outlet 13 is arranged at the front end of each pressurizing oil cavity 10, a pressurizing plunger 11 is inserted in each pressurizing oil cavity 10, the structural sizes of the pressurizing plungers 11 are the same, the rear end of each pressurizing plunger 11 is fixedly connected with the pneumatic piston 2, when the pneumatic piston 2 is positioned at the rear part of the pneumatic pressurizing cavity 3, the front end of each pressurizing plunger 11 is positioned at the rear end of the corresponding pressurizing oil cavity 10, and when the pneumatic piston 2 is positioned at the front part of the pneumatic pressurizing cavity 3, the front end of each pressurizing plunger 11 is positioned at the middle part or the front end of the corresponding pressurizing oil cavity 10;
the oil outlet 13 of each pressurizing oil chamber 10 is respectively communicated with the lower working chamber 28 of a synchronous working oil cylinder 27 through a synchronous oil pipeline 26, and the upper working chamber 29 of each synchronous working oil cylinder 27 is communicated with a pressure air source or external atmosphere through a return air passage 66 which is connected with an electromagnetic valve in series;
as shown in fig. 1 and 3, the low-pressure synchronous supercharger comprises a plurality of low-pressure cylinder blocks 31 arranged in the front-rear horizontal direction, the number of the low-pressure cylinder blocks 31 is the same as that of the plunger supercharging cylinders, each low-pressure cylinder block 31 is internally provided with a low-pressure pneumatic piston 32, a low-pressure pneumatic pressurizing cavity 33 is arranged in the low-pressure cylinder block 31 and is positioned behind the low-pressure pneumatic piston 32, a low-pressure air inlet 34 is arranged on the wall of the low-pressure pneumatic pressurizing cavity 33, a low-pressure front cavity 35 is arranged in the low-pressure cylinder block 31 and is positioned in front of the low-pressure pneumatic piston 32, a scavenging port 67 is arranged on the wall of the low-pressure front cavity 35, and the scavenging port;
each low-pressure air inlet 34 is communicated with a pressure air source or the external atmosphere through an air path which is connected with an electromagnetic valve in series;
the front end of each low-pressure cylinder block 31 is respectively provided with a low-pressure plunger cylinder seat 37, the rear end of each low-pressure cylinder block 31 is respectively provided with a rear cover 39, each low-pressure plunger cylinder seat 37 is respectively provided with a low-pressure plunger cylinder mounting hole 38, the axis of each low-pressure plunger cylinder mounting hole 38 is respectively positioned in the front-rear horizontal direction, and each low-pressure plunger cylinder mounting hole 38 is respectively provided with a low-pressure plunger pressurizing cylinder;
each low-pressure plunger piston pressure cylinder comprises a low-pressure cylinder body arranged along the front-rear horizontal direction, each low-pressure cylinder body is internally provided with a low-pressure oil cavity 40, the rear end of each low-pressure oil cavity 40 is provided with a low-pressure oil inlet 42, the front end of each low-pressure oil cavity 40 is provided with a low-pressure oil outlet 43, each low-pressure oil cavity 40 is internally inserted with a low-pressure plunger piston 41, the structural sizes of the low-pressure plunger pistons 41 are the same, the rear end of each low-pressure plunger piston 41 is fixedly connected with a low-pressure pneumatic piston 32 positioned at the rear end of the low-pressure plunger piston 41, when the low-pressure pneumatic piston 32 is positioned at the rear part of the low-pressure pneumatic pressure cavity 33, the front end of each low-pressure plunger piston 41 is positioned at the rear end of the corresponding low-pressure oil cavity, the front end of each low-pressure boosting plunger 41 is respectively positioned in the middle or at the front end of the corresponding low-pressure boosting oil chamber 40;
each low-pressure pneumatic piston 32 is fixedly connected with the front end of one synchronous positioning rod 60, the axis of each synchronous positioning rod 60 is positioned in the front-back horizontal direction, each synchronous positioning rod 60 extends backwards through the corresponding rear cover 39 along the front-back horizontal direction, and each synchronous positioning rod 60 is fixedly connected with each other through a synchronous positioning plate 61;
the low-pressure oil outlet 43 of each low-pressure oil pressurizing cavity 40 is respectively communicated with the oil inlet 12 at the rear end of one oil pressurizing cavity 10 through a low-pressure oil pipeline 62, when the low-pressure pneumatic piston 32 is pressed against the rear end surface in the low-pressure pneumatic pressurizing cavity 33, the low-pressure oil inlet 42 of each low-pressure oil pressurizing cavity 40 is respectively communicated with the lower part of an oil replenishing cylinder 64 through an oil replenishing exhaust pipeline 63, when the low-pressure pneumatic piston 32 moves away from the rear end surface in the low-pressure pneumatic pressurizing cavity 33, the low-pressure oil inlet 42 of each forward low-pressure oil pressurizing cavity 40 is respectively blocked by the corresponding low-pressure pneumatic piston 32, and the upper part of the oil replenishing cylinder 64 is communicated with a pressure air source or the outside atmosphere through a pressure air. In the using process, when the low-pressure pneumatic pistons 32 move backwards and open the corresponding low-pressure oil inlets 42, if the hydraulic oil in a certain low-pressure pressurizing oil cavity 40 is smaller than a set volume, the hydraulic oil in the oil supplementing cylinder 64 flows into the low-pressure pressurizing oil cavity 40, when the low-pressure oil inlets 42 are in an open state, air bubbles in the low-pressure pressurizing oil cavity 40 can be discharged into the oil supplementing cylinder 64 through the oil supplementing exhaust pipeline 63, meanwhile, the hydraulic oil with equal volume can be supplemented into the low-pressure pressurizing oil cavity 40, so that the low-pressure pressurizing oil cavities 40 can be better ensured to output the hydraulic oil with equal pressure and equal volume outwards through the low-pressure oil outlets 43, all the oil cylinders receiving the hydraulic oil can perform high-precision synchronous motion, and high-precision driving on a load element can be further realized.
The utility model discloses a can let a plurality of hydro-cylinders carry out high accuracy simultaneous movement's hydraulic drive system when using, the accessible is established ties pressure gas circuit 65 that has the solenoid valve to the upper portion input pressure gas of benefit hydro-cylinder 64, be in when open mode at low pressure oil inlet 42, can promote the hydraulic oil in the benefit hydro-cylinder 64 and flow to every low pressure booster oil pocket 40 through low pressure oil inlet 42, block up low pressure oil inlet 42 until low pressure booster plunger 41 forward motion, reducible or prevent that external gas from getting into in the low pressure booster plunger 41 from this, thereby can better guarantee that each low pressure booster oil pocket 40 outwards exports the isobaric pressure through low pressure oil-out 43 respectively, equivalent hydraulic oil, let each hydro-cylinder of accepting hydraulic oil carry out high accuracy simultaneous movement, and then can realize carrying out high accuracy drive to load element.
The utility model discloses a can let a plurality of hydro-cylinders carry out high accuracy synchronous motion's hydraulic drive system when needs promote the load fast, accessible every low pressure air inlet 34 is to the pneumatic pressurization chamber 33 interior input pressure gas of low pressure, promote all low pressure pneumatic piston 32 and all low pressure booster plungers 41 and move forward, let the hydraulic oil in each low pressure booster oil pocket 40 via corresponding low pressure oil-out 43, low pressure oil pipeline 62, the oil inlet 12 of booster oil pocket 10 rear end carry hydraulic oil to the synchronous booster of high pressure in to corresponding booster oil pocket 10, the hydraulic oil that gets into in each booster oil pocket 10 is again through the oil-out 13 of each booster oil pocket 10 via corresponding synchronous oil pipeline 26 respectively to the lower working chamber 28 of each synchronous working hydro-cylinder 27 carry hydraulic oil, because the structural dimension of each low pressure booster plunger 41 is the same each other, every low pressure pneumatic piston 32 is fixed with the front end of a synchronous locating lever 60 respectively, the axis of each synchronous positioning rod 60 is respectively located the front and back horizontal direction, each synchronous positioning rod 60 respectively extends backward through the corresponding rear cover 39 along the front and back horizontal direction, each synchronous positioning rod 60 is respectively fixed and connected through the synchronous positioning plate 61, so that multiple equivalent low-pressure power hydraulic oil can be accurately output, equal-pressure and equivalent hydraulic oil can be respectively injected into the lower working chambers 28 of the multiple synchronous working oil cylinders 27, the multiple synchronous working oil cylinders 27 can perform high-precision synchronous motion, and high-precision driving of load elements can be further realized.
The utility model discloses a can let a plurality of hydro-cylinders carry out high accuracy synchronous motion's hydraulic drive system when needs utilize high-pressure hydraulic oil to promote the load, can be with the pneumatic pressure boost chamber 3 of pressure gas input, promote pneumatic piston 2 and move forward, because the cross sectional area of pneumatic piston 2 is greater than the cross sectional area sum of all pressure boost plungers 11, when pressure boost plunger 11 inserts corresponding pressure boost oil pocket 10, can let the pressure of the hydraulic oil in the pressure boost oil pocket 10 that corresponds be greater than the pressure of gas in the pneumatic pressure boost chamber 3, can realize from this that the pressure of the hydraulic oil of letting pressure boost oil pocket 10 external output is greater than the pressure boost effect of the pressure of the gas in the pneumatic pressure boost chamber 3, because the structural dimension of each pressure boost plunger 11 is the same each other, so can accurate output many equivalent high-pressure power hydraulic oil. Therefore, the utility model discloses a can let a plurality of hydro-cylinders carry out high accuracy synchronous motion's hydraulic drive system can pour into equal pressure, equivalent hydraulic oil respectively in the working chamber of a plurality of hydro-cylinders, let a plurality of hydro-cylinders carry out high accuracy synchronous motion, and then can realize carrying out the high accuracy drive to load element.
As a further improvement of the utility model, the front part of the supercharging cylinder body is provided with an exhaust hole 15, the inner end of the exhaust hole 15 is communicated with the supercharging oil cavity 10, and the exhaust hole 15 is provided with a plug 16 in a rotating way.
As a further improvement of the utility model, the pipe joint 17 is installed at the oil outlet 13, and the quantity of the plunger pressure cylinder and the low-pressure plunger pressure cylinder is 2-8.
As a further improvement of the utility model, the rear end of above-mentioned pressure boost plunger 11 adopts clearance fit to pass the through-hole on the pneumatic piston 2 along the axial, and the rear end department that pressure boost plunger 11 is located pneumatic piston 2 is equipped with fixation nut 18 soon.
As a further improvement of the present invention, the middle portion of the outer side wall of the plunger cylinder seat 7 has a flange 19, and the flange 19 is connected to the rear end cover 9 through a plurality of connecting rods 20.
As the utility model discloses a further improvement, above-mentioned pressure boost cylinder body includes that the cross section is circular shape pressure boost cylinder 21, and oil-out 13 is located the middle part of the preceding terminal surface of pressure boost cylinder 21, and the rear end top of pressure boost cylinder 21 is on the preceding terminal surface of guide sleeve 22 on, pressure boost plunger 11 can pass seal sleeve 23 and guide sleeve 22 forward from the back in proper order, then insert pressure boost cylinder 21 again, is equipped with back sealing washer 24 between pressure boost plunger 11 and the seal sleeve 23, is equipped with preceding sealing washer 25 between pressure boost plunger 11 and the guide sleeve 22, and the rear portion in plunger jar mounting hole 8 is fixed in seal sleeve 23 cartridge, and the middle part in plunger jar mounting hole 8 is fixed in guide sleeve 22 cartridge, and the front portion in plunger jar mounting hole 8 is fixed in the middle and rear portion cartridge of pressure boost cylinder 21.
As a further improvement of the utility model, the middle rear part of the supercharging cylinder 21 is fixed in the plunger cylinder mounting hole 8 through threaded connection.
As a further improvement of the utility model, above-mentioned low pressure boost cylinder body includes that the cross section is circular shape low pressure boost cylinder 51, low pressure oil-out 43 is located low pressure boost cylinder 51's front end, and low pressure boost cylinder 51's front end cartridge has sealed lid 56, and low pressure boost cylinder 51's rear end suit is on low pressure direction sleeve barrel seat 52, and low pressure direction sleeve barrel seat 52 is fixed on low pressure plunger cylinder seat 37, and low pressure seal sleeve 53 is equipped with in the low pressure plunger cylinder mounting hole 38 interpolation on low pressure plunger cylinder seat 37, low pressure boost plunger 41 can be from the back forward pass low pressure seal sleeve 53 and low pressure direction sleeve barrel seat 52 in proper order, then insert low pressure boost cylinder 51 again in, be equipped with low pressure back sealing washer 54 between low pressure boost plunger 41 and the low pressure seal sleeve barrel 53, be equipped with low pressure front seal circle 55 between low pressure boost plunger 41 and the low pressure direction sleeve.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (8)
1. Can let a plurality of hydro-cylinders carry out high accuracy simultaneous movement's hydraulic drive system, its characterized in that: the device comprises a high-pressure synchronous supercharger and a low-pressure synchronous supercharger, wherein the high-pressure synchronous supercharger comprises a pneumatic cylinder body (1) arranged in the front-back horizontal direction, a pneumatic piston (2) is arranged in the pneumatic cylinder body (1), a pneumatic supercharging cavity (3) is arranged behind the pneumatic piston (2) in the pneumatic cylinder body (1), an air inlet (4) is formed in the wall of the pneumatic supercharging cavity (3), a front cavity (5) is arranged in the front of the pneumatic piston (2) in the pneumatic cylinder body (1), and a ventilation port communicated with the external atmosphere is formed in the wall of the front cavity (5);
a plunger cylinder seat (7) is installed at the front end of the pneumatic cylinder body (1), a rear end cover (9) is installed at the rear end of the pneumatic cylinder body (1), a plurality of plunger cylinder installation holes (8) are formed in the plunger cylinder seat (7) in parallel, the axes of the plunger cylinder installation holes (8) are respectively located in the front-rear horizontal direction, and a plunger pressurizing cylinder is installed at each plunger cylinder installation hole (8);
a reset pressure spring (14) is arranged in the front cavity (5), the rear end of the reset pressure spring (14) is propped against the front end face of the pneumatic piston (2), and the front end of the reset pressure spring (14) is propped against the rear end face of the plunger cylinder seat (7);
each plunger pressure cylinder comprises a pressure cylinder body arranged along the front-back horizontal direction, each pressure cylinder body is internally provided with a pressure oil cavity (10), the rear end of each pressure oil cavity (10) is provided with an oil inlet (12), the front end of each pressure oil cavity (10) is provided with an oil outlet (13), each pressure oil cavity (10) is internally inserted with a pressure plunger (11), the structural sizes of the pressure plungers (11) are the same, the rear end of each pressure plunger (11) is fixedly connected with the pneumatic piston (2), when the pneumatic piston (2) is positioned at the rear part in the pneumatic pressurizing cavity (3), the front end of each pressurizing plunger (11) is respectively positioned at the rear end of the corresponding pressurizing oil cavity (10), when the pneumatic piston (2) is positioned at the front part in the pneumatic pressurizing cavity (3), the front end of each pressurizing plunger (11) is respectively positioned at the middle part or the front end of the corresponding pressurizing oil cavity (10);
an oil outlet (13) of each pressurizing oil cavity (10) is respectively communicated with a lower working cavity (28) of one synchronous working oil cylinder (27) through a synchronous oil pipeline (26), and an upper working cavity (29) of each synchronous working oil cylinder (27) is communicated with a pressure air source or external atmosphere through a return air passage (66) which is connected with an electromagnetic valve in series;
the low-pressure synchronous supercharger comprises a plurality of low-pressure cylinder bodies (31) arranged in the front-rear horizontal direction, the number of the low-pressure cylinder bodies (31) is the same as that of the plunger supercharging cylinders, low-pressure pneumatic pistons (32) are respectively arranged in each low-pressure cylinder body (31), a low-pressure pneumatic pressurizing cavity (33) is arranged behind the low-pressure pneumatic pistons (32) in each low-pressure cylinder body (31), a low-pressure air inlet (34) is formed in the wall of each low-pressure pneumatic pressurizing cavity (33), a low-pressure front cavity (35) is formed in the front of the low-pressure pneumatic pistons (32) in each low-pressure cylinder body (31), a scavenging port (67) is formed in the wall of each low-pressure front cavity (35), and the scavenging port (67) is communicated with a pressure;
each low-pressure air inlet (34) is communicated with a pressure air source or the external atmosphere through an air path which is connected with an electromagnetic valve in series;
the front end of each low-pressure cylinder block (31) is respectively provided with a low-pressure plunger cylinder seat (37), the rear end of each low-pressure cylinder block (31) is respectively provided with a rear cover (39), each low-pressure plunger cylinder seat (37) is respectively provided with a low-pressure plunger cylinder mounting hole (38), the axis of each low-pressure plunger cylinder mounting hole (38) is respectively positioned in the front-rear horizontal direction, and each low-pressure plunger cylinder mounting hole (38) is respectively provided with a low-pressure plunger pressurizing cylinder;
each low-pressure plunger piston pressure cylinder comprises a low-pressure cylinder body arranged along the front-rear horizontal direction, each low-pressure cylinder body is internally provided with a low-pressure oil cavity (40), the rear end of each low-pressure oil cavity (40) is provided with a low-pressure oil inlet (42), the front end of each low-pressure oil cavity (40) is provided with a low-pressure oil outlet (43), each low-pressure oil cavity (40) is internally inserted with a low-pressure plunger piston (41), the structural sizes of the low-pressure plunger pistons (41) are the same, the rear end of each low-pressure plunger piston (41) is fixedly connected with a low-pressure pneumatic piston (32) positioned at the rear end of the low-pressure plunger piston (41), when the low-pressure pneumatic piston (32) is positioned at the rear part of the low-pressure pneumatic pressure cavity (33), the front end of each low-pressure, when the low-pressure pneumatic piston (32) is positioned at the front part in the low-pressure pneumatic pressurizing cavity (33), the front end of each low-pressure pressurizing plunger (41) is respectively positioned at the middle part or the front end of the corresponding low-pressure pressurizing oil cavity (40);
each low-pressure pneumatic piston (32) is fixedly connected with the front end of one synchronous positioning rod (60), the axis of each synchronous positioning rod (60) is respectively positioned in the front-back horizontal direction, each synchronous positioning rod (60) extends backwards through the corresponding rear cover (39) along the front-back horizontal direction, and each synchronous positioning rod (60) is fixedly connected with each other through a synchronous positioning plate (61);
the low-pressure oil outlet (43) of each low-pressure oil pressurizing cavity (40) is communicated with an oil inlet (12) at the rear end of one oil pressurizing cavity (10) through a low-pressure oil conveying pipeline (62), when a low-pressure pneumatic piston (32) is pressed against the rear end surface in the low-pressure pneumatic pressurizing cavity (33), the low-pressure oil inlet (42) of each low-pressure oil pressurizing cavity (40) is communicated with the lower part of an oil supplementing cylinder (64) through an oil supplementing exhaust pipeline (63), when the low-pressure pneumatic piston (32) moves forwards away from the rear end surface in the low-pressure pneumatic pressurizing cavity (33), the low-pressure oil inlet (42) of each low-pressure oil pressurizing cavity (40) is sealed by the corresponding low-pressure pneumatic piston (32), and the upper part of the oil supplementing cylinder (64) is communicated with a pressure air source or the outside atmosphere through a pressure air passage (65) connected with an electromagnetic valve in series.
2. The hydraulic drive system for enabling a plurality of cylinders to perform high precision synchronous motion according to claim 1, wherein: the front part of the pressurizing cylinder body is provided with an exhaust hole (15), the inner end of the exhaust hole (15) is communicated with the pressurizing oil cavity (10), and a plug (16) is screwed at the exhaust hole (15).
3. The hydraulic drive system for enabling a plurality of cylinders to perform high precision synchronous motion according to claim 2, wherein: and a pipe joint (17) is arranged at the oil outlet (13), and the number of the plunger pressure cylinders and the number of the low-pressure plunger pressure cylinders are 2-8.
4. The hydraulic drive system for enabling a plurality of cylinders to perform high precision synchronous motion according to claim 3, wherein: the rear end of the pressurizing plunger (11) penetrates through a through hole in the pneumatic piston (2) in the axial direction in a clearance fit mode, and a fixing nut (18) is screwed at the rear end, located on the pneumatic piston (2), of the pressurizing plunger (11).
5. The hydraulic drive system for enabling a plurality of cylinders to perform high precision synchronous motion according to claim 4, wherein: and the middle part of the outer side wall of the plunger cylinder seat (7) is provided with a flange plate (19), and the flange plate (19) is fixedly connected with the rear end cover (9) through a plurality of connecting pull rods (20).
6. The hydraulic drive system for allowing a plurality of cylinders to perform high-precision synchronous motion according to any one of claims 1 to 5, wherein: the boosting cylinder body comprises a boosting cylinder barrel (21) with a circular cross section, an oil outlet (13) is positioned in the middle of the front end face of the boosting cylinder barrel (21), the rear end of the boosting cylinder barrel (21) is propped against the front end face of the guide sleeve (22), the rear end of the guide sleeve (22) is propped against the front end face of the sealing sleeve (23), the booster plunger (11) can sequentially penetrate through the sealing sleeve (23) and the guide sleeve (22) from back to front and then is inserted into the booster cylinder barrel (21), a rear sealing ring (24) is arranged between the booster plunger (11) and the sealing sleeve (23), a front sealing ring (25) is arranged between the booster plunger (11) and the guide sleeve (22), the sealing sleeve (23) is fixed to the rear portion of the plunger cylinder mounting hole (8) in an inserted mode, the guide sleeve (22) is fixed to the middle portion of the plunger cylinder mounting hole (8) in an inserted mode, and the middle rear portion of the booster cylinder barrel (21) is fixed to the front portion of the plunger cylinder mounting hole (8) in an inserted mode.
7. The hydraulic drive system for enabling a plurality of cylinders to perform high precision synchronous motion according to claim 6, wherein: the middle rear part of the pressurizing cylinder barrel (21) is fixed in the plunger cylinder mounting hole (8) through threaded connection.
8. The hydraulic drive system for enabling a plurality of cylinders to perform high precision synchronous motion according to claim 7, wherein: the low-pressure boosting cylinder body comprises a low-pressure boosting cylinder barrel (51) with a circular cross section, a low-pressure oil outlet (43) is positioned at the front end of the low-pressure boosting cylinder barrel (51), a sealing cover (56) is inserted at the front end of the low-pressure boosting cylinder barrel (51), the rear end of the low-pressure boosting cylinder barrel (51) is sleeved on a low-pressure guide sleeve seat (52), the low-pressure guide sleeve seat (52) is fixed on a low-pressure plunger cylinder seat (37), a low-pressure sealing sleeve (53) is inserted in a low-pressure plunger cylinder mounting hole (38) on the low-pressure plunger cylinder seat (37), the low-pressure boosting plunger (41) can sequentially penetrate through the low-pressure sealing sleeve (53) and the low-pressure guide sleeve seat (52) from back to front and then is inserted into the low-pressure boosting cylinder barrel (51), a low-pressure rear sealing ring (54) is arranged between the low-pressure boosting plunger (41) and the low-pressure sealing sleeve (53), and a low-pressure front sealing ring (55) is arranged between the low-pressure boosting plunger (41) and the low-pressure guide sleeve seat (52).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110541862A (en) * | 2019-09-16 | 2019-12-06 | 吴瑜华 | Hydraulic driving system capable of enabling multiple oil cylinders to perform high-precision synchronous motion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110541862A (en) * | 2019-09-16 | 2019-12-06 | 吴瑜华 | Hydraulic driving system capable of enabling multiple oil cylinders to perform high-precision synchronous motion |
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