CN101725586A - Pressure and speed variable double-cylinder serial hydrocylinder - Google Patents
Pressure and speed variable double-cylinder serial hydrocylinder Download PDFInfo
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- CN101725586A CN101725586A CN200910223169A CN200910223169A CN101725586A CN 101725586 A CN101725586 A CN 101725586A CN 200910223169 A CN200910223169 A CN 200910223169A CN 200910223169 A CN200910223169 A CN 200910223169A CN 101725586 A CN101725586 A CN 101725586A
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Abstract
The invention discloses a pressure and speed variable double-cylinder serial hydrocylinder, which comprises a cylinder body (1), a cylinder top cover (2), a cylinder bottom cover (3), a small piston (4) and a large piston (5). The invention adopts the following technical scheme that: two cylinder cavities which have different sectional areas and are connected in series through a narrow cavity are arranged in the same cylinder body, two mutually independent pistons which have different sizes and are connected in series through hydraulic oil of the narrow cavity are coordinately arranged, an oil inlet hole and an oil outlet hole which are independent of each other are reserved in each cylinder cavity, and the switching of rapid low-pressure ejection function and slow high-pressure ejection function is provided for a servo mechanism under the same oil pressure by controlling the switching of an oil inlet circuit and an oil outlet circuit; the pressure and speed variable double-cylinder serial hydrocylinder provided by the invention overcomes the disadvantage that the hydrocylinder of the prior art has single and passive functions, and controls to switch the oil inlet circuit and the oil outlet circuit to change ejection force and an ejection speed of a piston rod of the hydrocylinder without changing the oil pressure, so that the hydrocylinder achieves the aims of diverse and active functions and suitability for popularization and application of simple hydraulic equipment.
Description
Technical field
The present invention relates to a kind of hydraulic jack, specifically be meant the enough same oil pressure of energy, switch, to the double-cylinder serial hydrocylinder that servomechanism provides quick low voltage to eject and high pressure ejects a kind of pressure and speed variable of function at a slow speed by control oil channel.
Background technique
The ejecting force of the hydraulic cylinder piston of prior art is by oil pressure and the long-pending decision of piston cross-section, and the speed that ejects of piston rod is by flow (flow velocity) decision of the hydraulic oil that enters oil cylinder cylinder chamber, and function singleness is passive; If will change the ejecting force of hydraulic cylinder piston rod, then to change the oil pressure that hydraulic system provides, perhaps change the long-pending hydraulic jack of suitable piston cross-section; The top power during with top speed that hydraulic equipment is in operation and need changes the oil cylinder piston bar adopts usually the high low pressure oil pump to switch to change that oil pressure changes top power and the control throttle valve is regulated top speed; And the control of the switching of oil pressure, throttle valve, then need realize by supporting hydraulic pressure automatic control system, for simple and easy hydraulic equipment, supporting hydraulic pressure automatic control system seems that cost is too high, even be higher than simple and easy hydraulic equipment itself, volume is big too simultaneously, is unsuitable for the application of simple and easy hydraulic equipment; Therefore, the hydraulic jack of prior art exists function singleness passive, is unsuitable for the problems and shortcomings of simple and easy hydraulic equipment popularization and application.
Summary of the invention
Problems and shortcomings at above-mentioned prior art existence, the present invention adopts small one and large one two cylinder chambeies through narrow chamber polyphone of sectional area is set in same cylinder body, and supporting small one and large one two the separate pistons that pass through hydraulic oil polyphone in the narrow chamber are set, each cylinder chamber is provided with separate turnover oilhole, the oil inlet hole in its medium and small cylinder chamber is arranged in the narrow chamber, switch inlet and outlet of fuel channel by control, realize using same oil pressure, to the technological scheme that servomechanism provides quick low voltage to eject and high pressure ejects the function switching at a slow speed, a kind of double-cylinder serial hydrocylinder of pressure and speed variable is provided, be intended to need not to change oil pressure, switch inlet and outlet of fuel channel by control, can change the ejecting force of oil cylinder piston bar and eject speed, make hydraulic jack reach diverse in function and active, be suitable for the purpose of simple and easy hydraulic equipment popularization and application.
The object of the present invention is achieved like this: a kind of double-cylinder serial hydrocylinder of pressure and speed variable, comprise cylinder body, cylinder top cover, cylinder bottom head, small piston, big piston, wherein: described cylinder body is the cylindrical hollow thick walled tube member of steel, the lumen shape structure along axis is from bottom to top, large diameter cylinder type, following big roundlet taper type, small diameter cylinders shape, the columniform concentric circle step through-hole of middle diameter gone up, the end face of cylinder body is fixedlyed connected with described cylinder top cover 2, fixedlys connected with described cylinder bottom head 3 in the bottom surface of cylinder body; The chamber that is surrounded by cylinder top cover 2 and middle diameter circle cylindricality tube chamber is little cylinder chamber, and the chamber that is surrounded by cylinder bottom head and large diameter cylinder type, truncated cone tube chamber is the vat chamber, and the small diameter cylinders shape tube chamber that is clipped between little cylinder chamber and the vat chamber is narrow chamber; The little cylinder that narrow chamber center lumen wall is provided with exterior ejects oilhole, and narrow chamber upper chambers wall is provided with the narrow chamber air release valve hole with exterior, and narrow chamber is positioned at the chamber wall that little cylinder ejects below the oilhole and is provided with annular groove, and seal ring is housed in the groove; Upper cone platform shape tube chamber place, vat chamber is provided with vat with the exterior oilhole that resets; The end face of cylinder body and bottom surface are laid with some blind screwholes of fixedlying connected with cylinder cap separately;
The rectangular thick plate body member that described cylinder top cover is a steel; The center of cylinder top cover plate body is provided with to be used to slide passes the through hole of small piston rod, and through-hole wall is provided with two road annular grooves, and seal ring is housed in the groove; It is corresponding to be provided with some blind screwhole positions with described cylinder deck above the cylinder top cover, is used to wear the fixedly connected through hole of screw; Be provided with below the cylinder top cover around with the annular flange step of the concentric protrusion of central through bore, the outer wall of flange step is provided with two road annular grooves, seal ring is housed in the groove, is the big down little truncated cone groove of between the aperture under the interior edge of flange step and the central through bore; One side of cylinder top cover plate body is provided with and the little cylinder that communicates at the bottom of the truncated cone groove oilhole that resets;
Described cylinder bottom head is the rectangular thick plate body member of steel; The top center of cylinder bottom head is provided with the annular flange step of protrusion, and the outer wall of flange step is provided with two road annular grooves, and seal ring is housed in the groove, and the interior of flange step is the big down little truncated cone groove of along the center; One side of cylinder bottom head plate body is provided with the vat that communicates with center at the bottom of the truncated cone groove and ejects oilhole; The blind screwhole position that is provided with some and described cylinder body bottom surface below the cylinder bottom head is corresponding, is used to wear the fixedly connected through hole of screw;
Described small piston is the concentric column step axis body shape member of steel, the small piston shape and structure along axis is from top to bottom, than the outside thread cylinder step of minor diameter, greater than the small piston rod cylinder step of external thread diameter, greater than the small piston cylinder step of small piston rod diameter; The post jamb of small piston cylinder step is provided with two road annular grooves, and seal ring is housed in the groove;
Described big piston is the concentric column step axis body shape member of steel, and the big piston shape and structure along axis is from top to bottom, than the big piston roofbolt body step of minor diameter, greater than the big piston cylinder step of big piston shank diameter; The post jamb of big piston cylinder step is provided with two road annular grooves, and seal ring is housed in the groove;
The diameter of described big piston cylinder step is greater than the diameter of described small piston cylinder step, is slidingly matched with the vat chamber of described cylinder body, and the narrow chamber of big piston roofbolt body step and described cylinder body is slidingly matched; The little cylinder chamber of described small piston cylinder step and described cylinder body is slidingly matched, and the central through bore of small piston cylinder step and described cylinder top cover is slidingly matched;
Each parts mutual alignment and annexation be, original state, and the end face of cylinder body was fixedlyed connected with screw with the following of described cylinder top cover, and fixedly connected with screw with the top of described cylinder bottom head in the bottom surface of cylinder body; The cylinder step sealing of small piston bottom is slided and is placed in the little cylinder chamber of cylinder body, and cylinder step bottom, small piston bottom contacts with the bottom step in little cylinder chamber, the small piston rod of small piston seals up to slide and passes the central through bore of cylinder top cover, the outside thread on small piston top expose the cylinder top cover above; The cylinder step sealing of big piston bottom is slided and is placed in the vat chamber, and cylinder step bottom, big piston bottom contacts with the top of the flange step of cylinder bottom head, the big piston bar seals up to slide and penetrates in the narrow chamber of cylinder body, and big piston masthead end is positioned at the lower edge that little cylinder on the wall of chamber, narrow chamber ejects the oilhole mouth;
Above-mentioned connection constituted little cylinder eject oilhole be positioned at small piston cylinder step below, little cylinder reset oilhole be positioned at small piston cylinder step above, vat eject oilhole be positioned at big piston cylinder step below, vat reset oilhole be positioned at big piston cylinder step above.
Working principle
Because the sectional area of big piston is greater than the sectional area of small piston, the pressure that is obtained under the condition of same oil pressure equals the multiplying power of sectional area with the ratio of the sectional area of small piston of big piston, therefore, under the condition of same oil pressure control switch oil circuit can make small piston rod eject pressure and speed acquires change;
Each oilhole of oil cylinder is connected with each oil pipe of the same name of hydraulic control circuit during application work, the narrow chamber air release valve hole of cylinder body is loaded onto outlet valve, open outlet valve, eject oilhole oiling in narrow chamber by little cylinder, get rid of air in the narrow chamber, close outlet valve, initial state oil circuit Close All, oil circuit is switched in control under the condition of same oil pressure:
A, quick low voltage eject and reset function
Open little cylinder and eject oilhole oil circuit, the little cylinder oilhole oil circuit that resets, the forward oil pressure: oil stream ejects the oilhole oil circuit from little cylinder and enters narrow chamber, bottom, little cylinder chamber, refluxes from the little cylinder oilhole oil circuit that resets, and moves on the small piston, small piston rod ejects, and small piston rod is carried out quick low voltage and ejected function;
Reverse oil pressure: oil stream enters top, little cylinder chamber from the little cylinder oilhole oil circuit that resets, and ejects the oilhole oil circuit from little cylinder and refluxes, and small piston moves down, the small piston rod withdrawal, and small piston rod is carried out reset function;
B, high pressure ejects and reset function at a slow speed
Open vat and eject oilhole oil circuit, vat oilhole oil circuit, the little cylinder oilhole oil circuit that resets that resets; The forward oil pressure: road binders stream ejects the oilhole oil circuit from vat and enters bottom, vat chamber, reflux from the vat oilhole oil circuit that resets, another road binders stream refluxes from the little cylinder oilhole oil circuit that resets, move on the big piston, the big piston bar lubricating pad that pushing tow is made of the hydraulic oil of retention in narrow chamber and bottom, little cylinder chamber that makes progress along narrow chamber, move on the pushing tow small piston, small piston rod to eject pressure identical with big piston with speed, because the vat chamber is bigger, under the constant condition of oil pressure, it is slower than moving speed on the small piston in the above-mentioned A example to move speed on the big piston, move on the big piston small piston in the above-mentioned A example of pressure ratio on to move pressure big, so the time, small piston rod carries out at a slow speed that high pressure ejects function;
Reverse oil pressure: road binders stream enters top, vat chamber from the vat oilhole oil circuit that resets, ejecting the oilhole oil circuit from vat refluxes, big piston moves down, the withdrawal of big piston bar, another road binders stream enters top, little cylinder chamber from the little cylinder oilhole oil circuit that resets, small piston moves down, the small piston rod withdrawal, and small piston rod is carried out reset function;
C, can carry out the variation combination that the transformation speed change ejects function
The oil circuit switching controls of above-mentioned A, B two examples is combined sequencing, but the layout small piston rod carry out such as, first quick low voltage ejects, high pressure ejects at a slow speed again; Perhaps earlier at a slow speed high pressure eject, the pressure and speed variable that ejects of quick low voltage ejects function again.
Above-mentioned, the present invention adopts small one and large one two cylinder chambeies through narrow chamber polyphone of sectional area is set in same cylinder body, and supporting small one and large one two the separate pistons that pass through hydraulic oil polyphone in the narrow chamber are set, each cylinder chamber is provided with separate turnover oilhole, the oil inlet hole in its medium and small cylinder chamber is arranged in the narrow chamber, switch inlet and outlet of fuel channel by control, use same oil pressure, to the technological scheme that servomechanism provides quick low voltage to eject and high pressure ejects the function switching at a slow speed, the double-cylinder serial hydrocylinder of a kind of pressure and speed variable that is provided, overcome the passive deficiency of function singleness of the hydraulic jack existence of prior art, need not to change oil pressure, switch inlet and outlet of fuel channel by control, can change the ejecting force of oil cylinder piston bar and eject speed, make hydraulic jack reach diverse in function, initiatively, the purpose that is suitable for simple and easy hydraulic equipment popularization and application.
Description of drawings
Fig. 1 is the structure cross-sectional schematic of the double-cylinder serial hydrocylinder of pressure and speed variable of the present invention;
Below in conjunction with the embodiment in the accompanying drawing the present invention is described in further detail, but should not be construed as any limitation of the invention.
Among the figure: cylinder body 1, little cylinder chamber 11, narrow chamber 12, little cylinder eject oilhole 121, narrow chamber air release valve hole 122, vat chamber 13, vat the reset oilhole 21, cylinder bottom head 3, vat of oilhole 131, cylinder top cover 2, little cylinder that reset and eject oilhole 31, small piston 4, small piston rod 41, big piston 5, big piston bar 51, seal ring 6.
Embodiment
Consult Fig. 1, the double-cylinder serial hydrocylinder of a kind of pressure and speed variable of the present invention, comprise cylinder body 1, cylinder top cover 2, cylinder bottom head 3, small piston 4, big piston 5, wherein: the cylindrical hollow thick walled tube member that described cylinder body 1 is a steel, the lumen shape structure along axis is from bottom to top, large diameter cylinder type, following big roundlet taper type, small diameter cylinders shape, the columniform concentric circle step through-hole of middle diameter gone up, the end face of cylinder body is fixedlyed connected with described cylinder top cover 2, fixedlys connected with described cylinder bottom head 3 in the bottom surface of cylinder body; The chamber that is surrounded by cylinder top cover 2 and middle diameter circle cylindricality tube chamber is little cylinder chamber 11, the chamber that is surrounded by cylinder bottom head 3 and large diameter cylinder type, truncated cone tube chamber is vat chamber 13, and the small diameter cylinders shape tube chamber that is clipped between little cylinder chamber 11 and the vat chamber 13 is narrow chamber 12; The little cylinder that narrow chamber 12 center lumen walls are provided with exterior ejects oilhole 121, narrow chamber 12 upper chambers walls are provided with the narrow chamber air release valve hole 122 with exterior, narrow chamber 12 is positioned at the chamber walls that little cylinder ejects below the oilhole 121 and is provided with annular groove, and seal ring 6 is housed in the groove; 13 upper cone platform shape tube chamber places, vat chamber are provided with vat with the exterior oilhole 131 that resets; The end face of cylinder body and bottom surface are laid with some blind screwholes of fixedlying connected with cylinder cap separately;
The rectangular thick plate body member that described cylinder top cover 2 is a steel; The center of cylinder top cover plate body is provided with to be used to slide passes the through hole of small piston rod 41, and through-hole wall is provided with two road annular grooves, and seal ring 6 is housed in the groove; The blind screwhole position that is provided with some and described cylinder body 1 end face above the cylinder top cover is corresponding, is used to wear the fixedly connected through hole of screw; Be provided with below the cylinder top cover around with the annular flange step of the concentric protrusion of central through bore, the outer wall of flange step is provided with two road annular grooves, seal ring 6 is housed in the groove, is the big down little truncated cone groove of between the aperture under the interior edge of flange step and the central through bore; One side of cylinder top cover plate body is provided with and the little cylinder that communicates at the bottom of the truncated cone groove oilhole 21 that resets;
The rectangular thick plate body member that described cylinder bottom head 3 is a steel; The top center of cylinder bottom head is provided with the annular flange step of protrusion, and the outer wall of flange step is provided with two road annular grooves, and seal ring 6 is housed in the groove, and the interior of flange step is the big down little truncated cone groove of along the center; One side of cylinder bottom head plate body is provided with the vat that communicates with center at the bottom of the truncated cone groove and ejects oilhole 31; The blind screwhole position that is provided with some and described cylinder body 1 bottom surface below the cylinder bottom head is corresponding, is used to wear the fixedly connected through hole of screw;
The concentric column step axis body shape member that described small piston 4 is a steel, the small piston shape and structure along axis is from top to bottom, than the outside thread cylinder step of minor diameter, greater than the small piston rod 41 cylinder steps of external thread diameter, greater than the small piston 4 cylinder steps of small piston rod 41 diameters; The post jamb of small piston 4 cylinder steps is provided with two road annular grooves, and seal ring 6 is housed in the groove;
The concentric column step axis body shape member that described big piston 5 is a steel, big piston shape and structure along axis be from top to bottom, than the big piston bar 51 cylinder steps of minor diameter, greater than the big piston 5 cylinder steps of big piston bar 51 diameters; The post jamb of big piston 5 cylinder steps is provided with two road annular grooves, and seal ring 6 is housed in the groove;
The diameter of described big piston 5 cylinder steps is greater than the diameter of described small piston 4 cylinder steps, is slidingly matched with the vat chamber 13 of described cylinder body 1, and the narrow chamber 12 of big piston bar 51 cylinder steps and described cylinder body 1 is slidingly matched; The little cylinder chamber 11 of described small piston 4 cylinder steps and described cylinder body 1 is slidingly matched, and the central through bore of small piston 4 cylinder steps and described cylinder top cover 2 is slidingly matched;
Each parts mutual alignment and annexation be, original state, and the end face of cylinder body 1 was fixedlyed connected with screw with the following of described cylinder top cover 2, and fixedly connected with screw with the top of described cylinder bottom head 3 in the bottom surface of cylinder body 1; Small piston 4 bottom cylinder step sealings are slided and are placed in the little cylinder chamber 11 of cylinder body 1, and cylinder step bottom, small piston 4 bottom contacts with the bottom step in little cylinder chamber 11, the small piston rod 41 of small piston 4 seals up to slide and passes the central through bore of cylinder top cover 2, the outside thread on small piston 4 tops expose cylinder top cover 2 above; Big piston 5 bottom cylinder step sealings are slided and are placed in the vat chamber 13, and cylinder step bottom, big piston 5 bottom contacts with the top of the flange step of cylinder bottom head 3, big piston bar 51 seals up to slide and penetrates in the narrow chamber 12 of cylinder body 1, and big piston bar 51 tops are positioned at the lower edge that little cylinder on the 12 chamber walls of narrow chamber ejects 121 mouthfuls of oilholes;
Above-mentioned connection constituted little cylinder eject oilhole 121 be positioned at small piston 4 cylinder steps below, little cylinder reset oilhole 21 be positioned at small piston 4 cylinder steps above, vat eject oilhole 31 be positioned at big piston 5 cylinder steps below, vat reset oilhole 131 be positioned at big piston 5 cylinder steps above.
Working principle
Because the sectional area of big piston 5 is greater than the sectional area of small piston 4, the pressure that is obtained under the condition of same oil pressure equals the multiplying power of sectional area with the ratio of the sectional area of small piston 4 of big piston 5, therefore, under the condition of same oil pressure control switch oil circuit can make small piston rod 41 eject pressure and speed acquires change;
Each oilhole of oil cylinder is connected with each oil pipe of the same name of hydraulic control circuit during application work, the narrow chamber air release valve hole 122 of cylinder body 1 is loaded onto outlet valve, open outlet valve, eject oilhole 121 oiling in narrow chamber 12 by little cylinder, get rid of air in the narrow chamber 12, close outlet valve, initial state oil circuit Close All, oil circuit is switched in control under the condition of same oil pressure:
A, quick low voltage eject and reset function
Open little cylinder and eject oilhole 121 oil circuits, little cylinder oilhole 21 oil circuits that reset, the forward oil pressure: oil stream ejects oilhole 121 oil circuits from little cylinder and enters narrow chamber 12,11 bottoms, little cylinder chamber, reflux from little cylinder oilhole 21 oil circuits that reset, move on the small piston 4, small piston rod 41 ejects, and small piston rod 41 is carried out quick low voltage and ejected function;
Reverse oil pressure: oil stream enters 11 tops, little cylinder chamber from little cylinder oilhole 21 oil circuits that reset, and ejects oilhole 121 oil circuits from little cylinder and refluxes, and small piston 4 moves down, small piston rod 41 withdrawals, and small piston rod 41 is carried out reset functions;
B, high pressure ejects and reset function at a slow speed
Open vat and eject oilhole 31 oil circuits, vat oilhole 131 oil circuits, little cylinder oilhole 21 oil circuits that reset that reset; The forward oil pressure: road binders stream ejects oilhole 31 oil circuits from vat and enters 13 bottoms, vat chamber, reflux from vat oilhole 131 oil circuits that reset, another road binders stream refluxes from little cylinder oilhole 21 oil circuits that reset, move on the big piston 5, big piston bar 51 is 12 lubricating pads that are made of the hydraulic oil of retention in narrow chamber 12 and 11 bottoms, little cylinder chamber of pushing tow upwards along narrow chamber, move on the pushing tow small piston 4, small piston rod 41 to eject pressure identical with big piston 5 with speed, because vat chamber 13 is bigger, under the constant condition of oil pressure, it is slower than moving speed on the small piston 4 in the above-mentioned A example to move speed on the big piston 5, move on the big piston 5 small piston 4 in the above-mentioned A example of pressure ratio on to move pressure big, so the time, small piston rod 41 carries out at a slow speed that high pressure ejects function;
Reverse oil pressure: road binders stream enters 13 tops, vat chamber from vat oilhole 131 oil circuits that reset, ejecting oilhole 31 oil circuits from vat refluxes, big piston 5 moves down, 51 withdrawals of big piston bar, another road binders stream enters 11 tops, little cylinder chamber from little cylinder oilhole 21 oil circuits that reset, small piston 4 moves down, small piston rod 41 withdrawals, and small piston rod 41 is carried out reset function;
C, can carry out the variation combination that the transformation speed change ejects function
The oil circuit switching controls of above-mentioned A, B two examples is combined sequencing, but layout small piston rod 41 carry out such as, first quick low voltage ejects, high pressure ejects at a slow speed again; Perhaps earlier at a slow speed high pressure eject, the pressure and speed variable that ejects of quick low voltage ejects function again.
Claims (1)
1. the double-cylinder serial hydrocylinder of a pressure and speed variable, comprise cylinder body (1), cylinder top cover (2), cylinder bottom head (3), small piston (4), big piston (5), it is characterized in that: described cylinder body (1) is the cylindrical hollow thick walled tube member of steel, the lumen shape structure along axis is from bottom to top, large diameter cylinder type, following big roundlet taper type, small diameter cylinders shape, the columniform concentric circle step through-hole of middle diameter gone up, the end face of cylinder body is fixedlyed connected with described cylinder top cover (2), fixedlys connected with described cylinder bottom head (3) in the bottom surface of cylinder body; The chamber that is surrounded by cylinder top cover (2) and middle diameter circle cylindricality tube chamber is little cylinder chamber (11), the chamber that is surrounded by cylinder bottom head (3) and large diameter cylinder type, truncated cone tube chamber is vat chamber (13), and the small diameter cylinders shape tube chamber that is clipped between little cylinder chamber (11) and vat chamber (13) is narrow chamber (12); The little cylinder that narrow chamber (12) center lumen wall is provided with exterior ejects oilhole (121), narrow chamber (12) upper chambers wall is provided with the narrow chamber air release valve hole (122) with exterior, narrow chamber (12) is positioned at the chamber wall that little cylinder ejects below the oilhole (121) and is provided with annular groove, and seal ring (6) is housed in the groove; Upper cone platform shape tube chamber place, vat chamber (13) is provided with vat with the exterior oilhole (131) that resets; The end face of cylinder body and bottom surface are laid with some blind screwholes of fixedlying connected with cylinder cap separately;
Described cylinder top cover (2) is the rectangular thick plate body member of steel; The center of cylinder top cover plate body is provided with to be used for sliding passes the through hole of small piston rod (41), and through-hole wall is provided with two road annular grooves, and seal ring (6) is housed in the groove; The blind screwhole position that is provided with some and described cylinder body (1) end face above the cylinder top cover is corresponding, is used to wear the fixedly connected through hole of screw; Be provided with below the cylinder top cover around with the annular flange step of the concentric protrusion of central through bore, the outer wall of flange step is provided with two road annular grooves, seal ring (6) is housed in the groove, is the big down little truncated cone groove of between the aperture under the interior edge of flange step and the central through bore; One side of cylinder top cover plate body is provided with and the little cylinder that communicates at the bottom of the truncated cone groove oilhole (21) that resets;
Described cylinder bottom head (3) is the rectangular thick plate body member of steel; The top center of cylinder bottom head is provided with the annular flange step of protrusion, and the outer wall of flange step is provided with two road annular grooves, and seal ring (6) is housed in the groove, and the interior of flange step is the big down little truncated cone groove of along the center; One side of cylinder bottom head plate body is provided with the vat that communicates with center at the bottom of the truncated cone groove and ejects oilhole (31); The blind screwhole position that is provided with some and described cylinder body (1) bottom surface below the cylinder bottom head is corresponding, is used to wear the fixedly connected through hole of screw;
Described small piston (4) is the concentric column step axis body shape member of steel, the small piston shape and structure along axis is from top to bottom, than the outside thread cylinder step of minor diameter, greater than small piston rod (41) the cylinder step of external thread diameter, greater than small piston (4) the cylinder step of small piston rod (41) diameter; The post jamb of small piston (4) cylinder step is provided with two road annular grooves, and seal ring (6) is housed in the groove;
Described big piston (5) is the concentric column step axis body shape member of steel, and the big piston shape and structure along axis is from top to bottom, than big piston bar (51) the cylinder step of minor diameter, greater than big piston (5) the cylinder step of big piston bar (51) diameter; The post jamb of big piston (5) cylinder step is provided with two road annular grooves, and seal ring (6) is housed in the groove;
The diameter of described big piston (5) cylinder step is greater than the diameter of described small piston (4) cylinder step, is slidingly matched with the vat chamber (13) of described cylinder body (1), and the narrow chamber (12) of big piston bar (51) cylinder step and described cylinder body (1) is slidingly matched; The little cylinder chamber (11) of described small piston (4) cylinder step and described cylinder body (1) is slidingly matched, and the central through bore of small piston (4) cylinder step and described cylinder top cover (2) is slidingly matched;
Each parts mutual alignment and annexation be, original state, following the fixedlying connected with screw of the end face of cylinder body (1) and described cylinder top cover (2), top the fixedlying connected with screw of the bottom surface of cylinder body (1) and described cylinder bottom head (3); The cylinder step sealing of small piston (4) bottom is slided and is placed in the little cylinder chamber (11) of cylinder body (1), and cylinder step bottom, small piston (4) bottom contacts with the bottom step in little cylinder chamber (11), the small piston rod (41) of small piston (4) seals up to slide and passes the central through bore of cylinder top cover (2), the outside thread on small piston (4) top expose cylinder top cover (2) above; The cylinder step sealing of big piston (5) bottom is slided and is placed in the vat chamber (13), and cylinder step bottom, big piston (5) bottom contacts with the top of the flange step of cylinder bottom head (3), big piston bar (51) seals up to slide and penetrates in the narrow chamber (12) of cylinder body (1), and big piston bar (51) top is positioned at the lower edge that little cylinder on the wall of chamber, narrow chamber (12) ejects oilhole (121) mouthful;
Above-mentioned connection constituted little cylinder eject oilhole (121) be positioned at small piston (4) cylinder step below, little cylinder reset oilhole (21) be positioned at small piston (4) cylinder step above, vat eject oilhole (31) be positioned at big piston (5) cylinder step below, vat reset oilhole (131) be positioned at big piston (5) cylinder step above.
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| CN200910223169A CN101725586A (en) | 2009-11-17 | 2009-11-17 | Pressure and speed variable double-cylinder serial hydrocylinder |
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| CN200910223169A CN101725586A (en) | 2009-11-17 | 2009-11-17 | Pressure and speed variable double-cylinder serial hydrocylinder |
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- 2009-11-17 CN CN200910223169A patent/CN101725586A/en active Pending
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| WO2015010630A1 (en) * | 2013-07-24 | 2015-01-29 | 常州市瑞泰工程机械有限公司 | Overlap removing oil cylinder, and flash butt welder having asymmetric-cross-section trough-type rail and using same |
| CN105270159A (en) * | 2014-05-28 | 2016-01-27 | 上海汽车集团股份有限公司 | Hydraulic control system and hybrid electric vehicle |
| CN105317776A (en) * | 2014-05-28 | 2016-02-10 | 上海汽车集团股份有限公司 | Hydraulic cylinder and control device with same |
| CN105317776B (en) * | 2014-05-28 | 2017-08-08 | 上海汽车集团股份有限公司 | A kind of hydraulic cylinder and the control device with the hydraulic cylinder |
| CN104100595A (en) * | 2014-07-06 | 2014-10-15 | 上海宏信设备工程有限公司 | Combined type threaded self-locking hydraulic oil cylinder |
| CN104100596A (en) * | 2014-07-06 | 2014-10-15 | 上海宏信设备工程有限公司 | Combined-type self-locking-ratchet hydraulic oil cylinder |
| CN112727844A (en) * | 2020-12-30 | 2021-04-30 | 宋丙臣 | Hydraulic cylinder capable of preventing jamming from smoothly running |
| CN114962387A (en) * | 2021-02-26 | 2022-08-30 | 西北核技术研究所 | Hydraulic displacement amplifier and hydraulic displacement amplification low-frequency sound wave transmitting device |
| CN115319519A (en) * | 2022-09-15 | 2022-11-11 | 上海诺倬力机电科技有限公司 | Linear shaft movement mechanism of precision machine tool |
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Application publication date: 20100609 |