CN204387004U - A kind of three grades of telescopic oil cylinders - Google Patents
A kind of three grades of telescopic oil cylinders Download PDFInfo
- Publication number
- CN204387004U CN204387004U CN201420869626.1U CN201420869626U CN204387004U CN 204387004 U CN204387004 U CN 204387004U CN 201420869626 U CN201420869626 U CN 201420869626U CN 204387004 U CN204387004 U CN 204387004U
- Authority
- CN
- China
- Prior art keywords
- grades
- piston rod
- piston
- peripheral surface
- gland
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Actuator (AREA)
Abstract
The utility model discloses a kind of three grades of telescopic oil cylinders, belong to the technical field of oil hydraulic cylinder development, comprising: first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies and cylinder assembly; Second piston rod assembly is sleeved on three grades of piston rod outer peripheral surfaces of three grades of piston rod assemblies; First stage piston bar assembly is sleeved on the second piston rod outer peripheral surface of second piston rod assembly; Cylinder assembly is sleeved on the first stage piston bar outer peripheral surface of first stage piston bar assembly; The end face of the cylinder bottom endoporus of cylinder assembly and the end of the non-boss of first stage piston bar, second piston rod, piston keep gap, and the end face of cylinder bottom endoporus and the end face of first stage piston bar boss and cylinder barrel end face fit tightly; The mode of telescopic oil cylinder of the present utility model by taking oil circuit to connect, makes product easily manufacture, and is easy to dismounting, can adapts to narrow space, compact structure, to stroke, the conditional applied environment of mounting distance size.
Description
Technical field
The utility model belongs to the technical field of oil hydraulic cylinder development, is specifically related to a kind of three grades of telescopic oil cylinders.
Background technique
At present, X supporting leg series pump truck of new generation have employed X-type telescopic outrigger structure comprehensively, and replace traditional pump truck H type leg structure, it is simpler that this supporting leg has structure, keeps in repair more convenient, well stressed, the major advantages such as one-sided support.Compare with traditional pump truck, new pump truck takes up an area space and significantly reduces, and meets narrow and small place construction requirement.And needing expansion four supporting legs during traditional pump truck construction, floor space is large.
Existing a kind of two-stage hydraulic cylinder (patent No.: ZL 201020687057.0), by by the first oil hydraulic cylinder and the reverse stacking connection of the second oil hydraulic cylinder, and the mode adopting oil circuit to contact, product is made to have extending amount large, simple and compact for structure, easily manufacture, be easy to the advantage dismantled, stretching out and retracting of the support oil cylinder being installed on X-type supporting leg series concrete pump truck can be guaranteed.The series loop adopted, because the oil circuit between the first oil hydraulic cylinder and the second oil hydraulic cylinder exists pressure drop, achieves the sequential telescopic of the first oil hydraulic cylinder and the second oil hydraulic cylinder; But the profile of this two-stage hydraulic cylinder is comparatively large and thrust is large not.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of three grades of telescopic oil cylinders, this oil cylinder is applied to the telescopic oil cylinder of X-type telescopic outrigger structure, there is extending amount large, volume is little, simple and compact for structure, easily manufactures, be easy to the feature dismantled, can be good at stretching out and retracting of the support oil cylinder ensureing to be installed on X-type supporting leg series concrete pump truck.
The utility model is achieved through the following technical solutions:
A kind of three grades of telescopic oil cylinders, comprising: first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies and cylinder assembly;
Described three grades of piston rod assemblies comprise: three grades of piston rod heads, three grades of piston rods, oil pipe, hydraulic fluid port dop A, hydraulic fluid port dop B, back-up ring, pistons; There are two oilholes described three grades of piston rod head inside; Described three grades of piston rods are the ladder-type cylinder with the through hole along its axis, and on the outer peripheral surface of the great circle near little circular portion, are provided with radial direction through hole along its circumferential direction; Described piston is axially arranged with ladder-type through hole along it, has boss structure at the end face of its little circular portion; Wherein, hydraulic fluid port dop A, hydraulic fluid port dop B are set on two oilholes of three grades of piston rod heads, oil pipe is fixedly connected with an oilhole of three grades of piston rod heads, three grades of piston rod heads are fixedly connected with three grades of piston rods, back-up ring is fixed on the inner peripheral surface of three grades of little circular portions of piston rod, oil pipe is positioned at the through hole of three grades of piston rods, and conflict is sleeved on the inner peripheral surface of back-up ring, and piston is fixed on the end of three grades of piston rods;
Described second piston rod assembly comprises: gland A, guide sleeve A, second piston rod, hole back-up ring A; Described second piston rod is ladder-type cylinder, is axially arranged with ladder-type through hole along it, and external diameter is the part of great circle, internal diameter is roundlet, in the position near great circle external diameter, along the through hole that uniform two circles of its circumferential direction are radial, the end face near great circle external diameter has boss structure; Wherein, gland A and guide sleeve A fit side by side be sleeved on second piston rod great circle inner-diameter portion whose inner peripheral surface on; Hole back-up ring A is sleeved in the groove on the inner peripheral surface of second piston rod great circle outer radius portion end;
Described first stage piston bar assembly comprises: gland B, guide sleeve B, first stage piston bar, hole back-up ring B; Described first stage piston bar is ladder-type cylinder, is axially arranged with ladder-type through hole along it, and external diameter is the part of great circle, internal diameter is roundlet, in the position near great circle external diameter, along the through hole that uniform two circles of its circumferential direction are radial, the end face near great circle external diameter has boss structure; Wherein, gland B and guide sleeve B fit side by side be sleeved on first stage piston bar great circle inner-diameter portion whose inner peripheral surface on; Hole back-up ring B is sleeved in the groove on the inner peripheral surface of first stage piston bar great circle external diameter end;
Described cylinder assembly comprises: gland C, guide sleeve C, cylinder barrel, cylinder bottom; Described cylinder barrel is ladder-type cylinder, is axially arranged with ladder-type through hole along it, and external diameter is the part of great circle, and internal diameter is great circle; Described cylinder bottom is axially arranged with ladder-type blind hole along it; Wherein, gland C and guide sleeve C fit side by side be sleeved on cylinder barrel great circle inner-diameter portion whose inner peripheral surface on; Cylinder barrel by Cock screw fixing and locking on the outer peripheral surface of gland C; Cylinder bottom is sleeved on the outer peripheral surface of cylinder barrel roundlet portion distal end, cylinder bottom by Cock screw fixing and locking on the outer peripheral surface of cylinder barrel;
Its annexation is as follows: second piston rod assembly is sleeved on three grades of piston rod outer peripheral surfaces of three grades of piston rod assemblies; The gland A of second piston rod assembly and the outer peripheral surface of guide sleeve A and three grade piston rod fit tightly; The outer peripheral surface of the inner peripheral surface of the second piston rod of second piston rod assembly and three grades of piston rods keeps gap; The hole back-up ring A of second piston rod assembly conflicts the end face at piston boss place of three grades of piston rod assemblies;
First stage piston bar assembly is sleeved on the second piston rod outer peripheral surface of second piston rod assembly; The gland B of first stage piston bar assembly and the outer peripheral surface of guide sleeve B and second piston rod fit tightly; The inner peripheral surface of the first stage piston bar of first stage piston bar assembly and the outer peripheral surface of second piston rod keep gap; The hole of the first stage piston bar assembly end face at back-up ring B conflict second piston rod boss place;
Cylinder assembly is sleeved on the first stage piston bar outer peripheral surface of first stage piston bar assembly; The gland C of cylinder assembly and the outer peripheral surface of guide sleeve C and first stage piston bar fit tightly; The inner peripheral surface of the cylinder barrel of cylinder assembly and the outer peripheral surface of first stage piston bar keep gap; The end face of the cylinder bottom endoporus of cylinder assembly and the end of the non-boss of first stage piston bar, second piston rod, piston keep gap, and the end face of cylinder bottom endoporus and the end face of first stage piston bar boss and cylinder barrel end face fit tightly.
Further, an oilhole of described oil pipe and three grades of piston rod heads, three grades of piston rod heads and three grades of piston rods and back-up ring are with the mode that is fixedly connected with of three grades of piston rods and weld.
Further, the mode that is fixedly connected with three grades of piston rods of described piston is for being threaded.
Further, be set with guide ring and dust ring in the groove on the inner peripheral surface of described gland A, gland B and gland C, wherein, dust ring is positioned on gland A gland A, gland B and gland C near gland A, the gland B of three grades of piston rod heads and the end of gland C; Wherein, one end of described dust ring is wedge-shaped structure, and described guide ring is the cylindrical body with axial hole of hard.
Further, the end of described guide sleeve A, guide sleeve B, guide sleeve C one end along its be circumferentially with the equally distributed radial groove of two or more and axial hole through, and be all set with seal ring in the groove of the inner peripheral surface of described guide sleeve A, guide sleeve B and guide sleeve C, outer peripheral surface.
Further, described first stage piston bar great circle outer radius portion, second piston rod great circle outer radius portion and the outer peripheral surface of piston be all set with guide ring and combined seal ring.
Further, a seal ring is all set with at the groove of the inner peripheral surface of described piston and cylinder bottom.
Working principle: when three grades of telescopic oil cylinders are in the ultimate state of compression, oil enters from the oilhole of connected pipes, oil enters in the hole of piston by oil pipe, enter into end face and the piston of the endoporus of cylinder bottom again, second piston rod, in the gap of the end of first stage piston bar, when constantly executing oil pressure, promote first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies move to the direction away from cylinder bottom together in the hole of motionless cylinder barrel, until the end contact of the structure of the end-boss of first stage piston bar and guide sleeve C, namely the movement of first stage piston bar assembly is restricted, when continuing to apply oil pressure, promotion second piston rod assembly, three grades of piston rod assemblies move to the direction away from cylinder bottom together in the hole of motionless first stage piston bar, until the end contact of the structure of the end-boss of second piston rod and guide sleeve B, namely the movement of second piston rod assembly is restricted, when continuing again to apply oil pressure, promote three grades of piston rod assemblies to move to the direction away from cylinder bottom in the hole of motionless second piston rod, until the end contact of the end face of piston and guide sleeve A, namely the movement of three grades of piston rod assemblies is restricted, and namely first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies all arrive the limit position of elongation,
When three grades of telescopic oil cylinders are in the ultimate state of elongation, the oilhole of oily never connected pipes enters, namely be directly passed in the hole of three grades of piston rods, oil is stopped by the back-up ring of three grades of piston-rod ends, when oil pressure constantly rises, the through hole that can only enclose radial direction by three grades of piston rods one flow in the gap of three grades of piston rods and second piston rod, under the effect of the oil pressure constantly increased, gap is constantly expanded, namely promote three grades of piston rod assemblies to move to the direction near cylinder bottom, until the boss conflict hole back-up ring A of piston, namely the movement of three grades of piston rod assemblies is restricted, when oil pressure continues to increase, oil flow in the gap of second piston rod and first stage piston bar by second piston rod near the through hole of that circle radial direction of cylinder bottom, under the effect of the oil pressure constantly increased, gap is constantly expanded, namely second piston rod assembly is promoted, three grades of piston rod assemblies move to the direction near cylinder bottom together, until the boss conflict hole back-up ring B of second piston rod, namely the movement of second piston rod assembly is restricted, wherein, in the process that gap continues to increase, through hole away from that circle radial direction of cylinder bottom also starts to flow oil in a large number, adopt the through hole of two circle radial direction that the travelling speed of second piston assembly can be made to accelerate, when oil pressure continues to increase again, oil flow in the gap of first stage piston bar and cylinder barrel by first stage piston bar near the through hole of that circle radial direction of cylinder bottom, under the effect of the oil pressure constantly increased, gap is constantly expanded, namely first stage piston bar assembly is promoted, second piston rod assembly, three grades of piston rod assemblies move to the direction near cylinder bottom together, until the boss conflict cylinder barrel of first stage piston bar, namely the movement of first stage piston bar assembly is restricted, wherein, in the process that gap continues to increase, through hole away from that circle radial direction of cylinder bottom also starts to flow oil in a large number, adopt the through hole of two circle radial direction that the travelling speed of first stage piston assembly can be made to accelerate, namely first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies all reply the limit position of compression.
Beneficial effect: the mode of (1) telescopic oil cylinder of the present utility model by taking oil circuit to connect, makes product easily manufacture, is easy to dismounting, can adapts to narrow space, compact structure, to stroke, the conditional applied environment of mounting distance size.
(2) guide ring in the utility model mainly plays the coaxality ensureing the piston body of rod, prevents the piston body of rod from bending.
(3) in the utility model except konisphere be wedge-shaped structure, the dust on body of rod surface can be removed when piston body of rod generation fore and aft motion.
(4) the utility model adopts series loop, because the face area of first stage piston bar, second piston rod and piston is different, there is pressure drop, achieves the sequential telescopic of first stage piston bar, second piston rod, three grades of piston rods.
(5) guide sleeve of the present utility model respectively with the great circle outer radius portion of first stage piston bar, the great circle outer radius portion of second piston rod, the conflict of piston, achieve spacing effect.
Accompanying drawing explanation
Fig. 1 is the limited compression state of the utility model three grades of oil cylinders.
Fig. 2 is the one-level elongation state of the utility model three grades of oil cylinders.
Fig. 3 is the secondary elongation state of the utility model three grades of oil cylinders
Fig. 4 is the ultimate elongation state of the utility model three grades of oil cylinders.
Fig. 5 is the structural representation of first stage piston bar of the present utility model.
Fig. 6 is the structural representation of second piston rod of the present utility model.
Fig. 7 is the structural representation of piston of the present utility model.
Wherein, 1-tri-grades of piston rod heads, 2-gland A, 3-gland B, 4-gland C, 21-guide sleeve A, 22-guide sleeve B, 23-guide sleeve C, 24-cylinder barrel, 25-first stage piston bar, 26-second piston rod, 27-piston, 42-cylinder bottom, 43-uses in hole back-up ring A, 44-uses in hole back-up ring B, 48-hydraulic fluid port dop A, 49-hydraulic fluid port dop B, 50-back-up ring, 51-tri-grades of piston rods, 52-oil pipe.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, the utility model is described in detail.
The utility model provides a kind of three grades of telescopic oil cylinders, see accompanying drawing 1, comprising: first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies and cylinder assembly;
See accompanying drawing 7, described three grades of piston rod assemblies comprise: three grades of piston rod heads, 1, three grades of piston rods 51, oil pipe 52, hydraulic fluid port dop A48, hydraulic fluid port dop B49, back-up ring 50, piston 27; There are two oilholes described three grades of piston rod head 1 inside; Described three grades of piston rods 51 are the ladder-type cylinder with the through hole along its axis, and the outer peripheral surface of its little circular portion has outside thread, and on the outer peripheral surface of the great circle near little circular portion, along the uniform multiple radial direction through hole of its circumferential direction as oilhole; Described piston 27 is axially arranged with ladder-type through hole along it, has internal thread at the part inner peripheral surface of great circle, and has an annular groove, has boss structure at the end face of its little circular portion, at uniform four annular grooves of its outer peripheral surface;
See accompanying drawing 6, described second piston rod assembly comprises: gland A2, guide sleeve A21, second piston rod 26, hole back-up ring A43; The inner peripheral surface of described gland A2 distributes the annular groove of three; The inner peripheral surface of described guide sleeve A21 distributes two annular grooves, and outer peripheral surface distributes an annular groove, and the end of its one end along its be circumferentially with 4 equally distributed radial grooves and axial hole through; Described second piston rod 26 is ladder-type cylinder, ladder-type through hole is axially arranged with along it, and external diameter is the part of great circle, internal diameter is roundlet, in the position near great circle external diameter, along the through hole that uniform two circles of its circumferential direction are radial, that ring through hole number away from great circle external diameter end is 6, that ring through hole near great circle external diameter end is 12, and has boss structure, at uniform three annular grooves of the outer peripheral surface of its great circle outer radius portion near the end face of great circle external diameter;
See accompanying drawing 5, described first stage piston bar assembly comprises: gland B3, guide sleeve B22, first stage piston bar 25, hole back-up ring B44; The annular groove of the inner peripheral surface part two of described gland B3; The inner peripheral surface of described guide sleeve B22 distributes two annular grooves, and outer peripheral surface distributes two annular grooves, and the end of its one end along its be circumferentially with 4 equally distributed radial grooves and axial hole through; Described first stage piston bar 25 is ladder-type cylinder, ladder-type through hole is axially arranged with along it, and external diameter is the part of great circle, internal diameter is roundlet, in the position near great circle external diameter, along the through hole that uniform two circles of its circumferential direction are radial, that ring through hole number away from great circle external diameter end is 12, that ring through hole near great circle external diameter end is 24, and has boss structure, at uniform three annular grooves of the outer peripheral surface of its great circle outer radius portion near the end face of great circle external diameter;
Described cylinder assembly comprises: gland C4, guide sleeve C23, cylinder barrel 24, cylinder bottom 42; The annular groove of the inner peripheral surface part two of described gland C4; The inner peripheral surface of described guide sleeve C23 distributes two annular grooves, and outer peripheral surface distributes an annular groove, and the end of its one end along its be circumferentially with 4 equally distributed radial grooves and axial hole through; Described cylinder barrel 24 is ladder-type cylinder, is axially arranged with ladder-type through hole along it, and external diameter is the part of great circle, and internal diameter is great circle; Described cylinder bottom 42 is axially arranged with ladder-type blind hole along it, and its inner peripheral surface is away from position distribution annular groove of the open end of blind hole;
Its annexation is as follows: hydraulic fluid port dop A48, hydraulic fluid port dop B49 is set on two oilholes of three grades of piston rod heads 1, an oilhole of oil pipe 52 and three grades of piston rod heads 1 is fixedly connected by welding, three grades of piston rod heads 1 and three grades of piston rods 51 are fixedly connected by welding, back-up ring 50 is fixed by welding on the inner peripheral surface of three grades of little circular portions of piston rod 51, and oil pipe 52 is positioned at the through hole of three grades of piston rods 51, conflict is sleeved on the inner peripheral surface of back-up ring 50 simultaneously, piston 27 is fixed on the end of three grades of piston rods 51 by screw thread, and locked by Cock screw, article one, ring set is in the groove of the inner peripheral surface of piston 27, and three guide rings and a combined seal ring are sleeved in the groove of the outer peripheral surface of piston 27,
Gland A2 and guide sleeve A21 fit side by side be sleeved on three grades of piston rods 51 outer peripheral surface on, and be set with two guide rings and a dust ring altogether in groove on the inner peripheral surface of gland A2, wherein, dust ring is positioned at the gland A2 end near three grades of piston rod heads 1 on gland A2, be set with two seal rings in groove on the inner peripheral surface of guide sleeve A21 altogether, in the groove of the outer peripheral surface of guide sleeve A21, be set with a seal ring;
Second piston rod 26 is sleeved on the outer peripheral surface of gland A2, guide sleeve A21, three grades of piston rods 51 and piston 27, and the outer peripheral surface of the inner peripheral surface of second piston rod 26 and gland A2, guide sleeve A21, piston 27 is all fitted, and keeps gap with the outer peripheral surface of three grades of piston rods 51; Two guide rings and a combined seal ring are sleeved in the groove on the outer peripheral surface of second piston rod 26 great circle external diameter; And hole back-up ring A43 is sleeved in the groove on the inner peripheral surface of second piston rod 26 great circle outer radius portion end, the hole end face at back-up ring A43 conflict piston 27 boss place;
Gland B3 and guide sleeve B22 fit side by side be sleeved on second piston rod 26 outer peripheral surface on, and be set with a guide ring and a dust ring altogether in groove on the inner peripheral surface of gland B3, wherein, dust ring is positioned at the gland B3 end near three grades of piston rod heads 1 on gland B3, in groove on the inner peripheral surface of guide sleeve B22, suit two seal rings, are set with two seal rings in the groove of the outer peripheral surface of guide sleeve B22;
First stage piston bar 25 is sleeved on the outer peripheral surface of gland B3, guide sleeve B22, second piston rod 26, and the outer peripheral surface of the inner peripheral surface of first stage piston bar 25 and second piston rod 26 great circle outer radius portion, gland B3, guide sleeve B22 is all fitted, and keeps gap with the outer peripheral surface of the roundlet outer radius portion of second piston rod 26; Two guide rings and a combined seal ring are sleeved in the groove on the outer peripheral surface of first stage piston bar 25 great circle external diameter, and hole back-up ring B44 is sleeved on the inner peripheral surface of first stage piston bar 25 great circle external diameter end, the hole end face at back-up ring B44 conflict second piston rod 26 boss place;
Gland C4 and guide sleeve C23 fit side by side be sleeved on first stage piston bar 25 outer peripheral surface on, and be set with a guide ring and a dust ring altogether in groove on the inner peripheral surface of gland C4, wherein, dust ring is positioned at the gland C4 end near three grades of piston rod heads 1 on gland C4, in groove on the inner peripheral surface of guide sleeve C23, suit two seal rings, are set with a seal ring in the groove of the outer peripheral surface of guide sleeve C23;
Cylinder barrel 24 is sleeved on gland C4, guide sleeve C23, on the outer peripheral surface of first stage piston bar 25, and the great circle outer radius portion of the inner peripheral surface of cylinder barrel 24 and first stage piston bar 25, gland C4, the outer peripheral surface of guide sleeve C23 is all fitted, gap is kept with the outer peripheral surface of the roundlet outer radius portion of first stage piston bar 25, and cylinder barrel 24 by Cock screw fixing and locking on the outer peripheral surface of gland C4, a ring set is in the groove of cylinder bottom 42 inner peripheral surface, and cylinder bottom 42 is sleeved on the outer peripheral surface of cylinder barrel 24 roundlet portion distal end, the simultaneously end face of endoporus of cylinder bottom 42 and the end of the non-boss of first stage piston bar 25, second piston rod 26, piston 27 keeps gap, the end face of the endoporus of cylinder bottom 42 and the end face of first stage piston bar 25 boss and cylinder barrel 24 end face fit tightly, cylinder bottom 42 by Cock screw fixing and locking on the outer peripheral surface of cylinder barrel 24.
Wherein, one end of described dust ring is wedge-shaped structure, and described guide ring is the cylindrical body with axial hole of hard.
Working principle: see accompanying drawing 1-4, when three grades of telescopic oil cylinders are in the ultimate state of compression, oil enters from the oilhole of connected pipes 52, oil enters in the hole of piston 27 by oil pipe 52, enter into end face and the piston 27 of the endoporus of cylinder bottom 42 again, second piston rod 26, in the gap of the end of first stage piston bar 25, when constantly executing oil pressure, promote first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies move to the direction away from cylinder bottom 42 together in the hole of motionless cylinder barrel 24, until the end contact of the structure of the end-boss of first stage piston bar 25 and guide sleeve C23, namely the movement of first stage piston bar assembly is restricted, when continuing to apply oil pressure, promotion second piston rod assembly, three grades of piston rod assemblies move to the direction away from cylinder bottom 42 together in the hole of motionless first stage piston bar 25, until the end contact of the structure of the end-boss of second piston rod 26 and guide sleeve B22, namely the movement of second piston rod assembly is restricted, when continuing again to apply oil pressure, promote three grades of piston rod assemblies to move to the direction away from cylinder bottom 42 in the hole of motionless second piston rod 26, until the end contact of the end face of piston 27 and guide sleeve A21, namely the movement of three grades of piston rod assemblies is restricted, and namely first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies all arrive the limit position of elongation,
When three grades of telescopic oil cylinders are in the ultimate state of elongation, the oilhole of oily never connected pipes 52 enters, namely be directly passed in the hole of three grades of piston rods 51, oil is stopped by the back-up ring 50 of three grades of piston rod 51 ends, when oil pressure constantly rises, three grades of piston rods 51 can only be flow into in the gap of second piston rod 26 by the through hole of three grades of piston rods 51 1 circle radial direction, under the effect of the oil pressure constantly increased, gap is constantly expanded, namely promote three grades of piston rod assemblies to move to the direction near cylinder bottom 42, until the boss conflict hole back-up ring A43 of piston 27, namely the movement of three grades of piston rod assemblies is restricted, when oil pressure continues to increase, oil flow into second piston rod 26 with in the gap of first stage piston bar 25 by second piston rod 26 near the through hole of that circle radial direction of cylinder bottom 42, under the effect of the oil pressure constantly increased, gap is constantly expanded, namely second piston rod assembly is promoted, three grades of piston rod assemblies move to the direction near cylinder bottom 42 together, until the boss conflict hole back-up ring B44 of second piston rod 26, namely the movement of second piston rod assembly is restricted, wherein, in the process that gap continues to increase, through hole away from that circle radial direction of cylinder bottom 42 also starts to flow oil in a large number, adopt the through hole of two circle radial direction that the travelling speed of second piston assembly can be made to accelerate, when oil pressure continues to increase again, oil flow into first stage piston bar 25 with in the gap of cylinder barrel 24 by first stage piston bar 25 near the through hole of that circle radial direction of cylinder bottom 42, under the effect of the oil pressure constantly increased, gap is constantly expanded, namely first stage piston bar assembly is promoted, second piston rod assembly, three grades of piston rod assemblies move to the direction near cylinder bottom 42 together, until the boss conflict cylinder bottom 42 of first stage piston bar 26, namely the movement of first stage piston bar assembly is restricted, wherein, in the process that gap continues to increase, through hole away from that circle radial direction of cylinder bottom 42 also starts to flow oil in a large number, adopt the through hole of two circle radial direction that the travelling speed of first stage piston assembly can be made to accelerate, namely first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies all reply the limit position of compression.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. three grades of telescopic oil cylinders, is characterized in that, comprising: first stage piston bar assembly, second piston rod assembly, three grades of piston rod assemblies and cylinder assembly;
Described three grades of piston rod assemblies comprise: three grades of piston rod heads (1), three grades of piston rods (51), oil pipe (52), hydraulic fluid port dop A (48), hydraulic fluid port dop B (49), back-up ring (50), piston (27), there are two oilholes described three grades of piston rod head (1) inside, described three grades of piston rods (51) are the ladder-type cylinder with the through hole along its axis, and on the outer peripheral surface of the great circle near little circular portion, are provided with radial direction through hole along its circumferential direction, described piston (27) is axially arranged with ladder-type through hole along it, has boss structure at the end face of its little circular portion, wherein, hydraulic fluid port dop A (48), hydraulic fluid port dop B (49) is set on two oilholes of three grades of piston rod heads (1), oil pipe (52) is fixedly connected with an oilhole of three grades of piston rod heads (1), three grades of piston rod heads (1) are fixedly connected with three grades of piston rods (51), back-up ring (50) is fixed on the inner peripheral surface of three grades of little circular portions of piston rod (51), oil pipe (52) is positioned at the through hole of three grades of piston rods (51), and conflict is sleeved on the inner peripheral surface of back-up ring (50), piston (27) is fixed on the end of three grades of piston rods (51),
Described second piston rod assembly comprises: gland A (2), guide sleeve A (21), second piston rod (26), hole back-up ring A (43); Described second piston rod (26) is ladder-type cylinder, is axially arranged with ladder-type through hole along it, and external diameter is the part of great circle, internal diameter is roundlet, in the position near great circle external diameter, along the through hole that uniform two circles of its circumferential direction are radial, the end face near great circle external diameter has boss structure; Wherein, gland A (2) and guide sleeve A (21) fit side by side be sleeved on second piston rod (26) great circle inner-diameter portion whose inner peripheral surface on; Hole back-up ring A (43) is sleeved in the groove on the inner peripheral surface of second piston rod (26) great circle outer radius portion end;
Described first stage piston bar assembly comprises: gland B (3), guide sleeve B (22), first stage piston bar (25), hole back-up ring B (44); Described first stage piston bar (25) is ladder-type cylinder, is axially arranged with ladder-type through hole along it, and external diameter is the part of great circle, internal diameter is roundlet, in the position near great circle external diameter, along the through hole that uniform two circles of its circumferential direction are radial, the end face near great circle external diameter has boss structure; Wherein, gland B (3) and guide sleeve B (22) fit side by side be sleeved on first stage piston bar (25) great circle inner-diameter portion whose inner peripheral surface on; Hole back-up ring B (44) is sleeved in the groove on the inner peripheral surface of first stage piston bar (25) great circle external diameter end;
Described cylinder assembly comprises: gland C (4), guide sleeve C (23), cylinder barrel (24), cylinder bottom (42); Described cylinder barrel (24) is ladder-type cylinder, is axially arranged with ladder-type through hole along it, and external diameter is the part of great circle, and internal diameter is great circle; Described cylinder bottom (42) is axially arranged with ladder-type blind hole along it; Wherein, gland C (4) and guide sleeve C (23) fit side by side be sleeved on cylinder barrel (24) great circle inner-diameter portion whose inner peripheral surface on; Cylinder barrel (24) by Cock screw fixing and locking on the outer peripheral surface of gland C (4); Cylinder bottom (42) is sleeved on the outer peripheral surface of cylinder barrel (24) roundlet portion distal end, cylinder bottom (42) by Cock screw fixing and locking on the outer peripheral surface of cylinder barrel (24);
Its annexation is as follows: second piston rod assembly is sleeved on three grades of piston rod (51) outer peripheral surfaces of three grades of piston rod assemblies; The gland A (2) of second piston rod assembly and guide sleeve A (21) fits tightly with the outer peripheral surface of three grades of piston rods (51); The inner peripheral surface of the second piston rod (26) of second piston rod assembly and the outer peripheral surface of three grades of piston rods (51) keep gap; Conflict with back-up ring A (43) end face at piston (27) boss place of three grades of piston rod assemblies in the hole of second piston rod assembly;
First stage piston bar assembly is sleeved on second piston rod (26) outer peripheral surface of second piston rod assembly; The gland B (3) of first stage piston bar assembly and guide sleeve B (22) fits tightly with the outer peripheral surface of second piston rod (26); The inner peripheral surface of the first stage piston bar (25) of first stage piston bar assembly and the outer peripheral surface of second piston rod (26) keep gap; The hole of the first stage piston bar assembly end face at back-up ring B (44) conflict second piston rod (26) boss place;
Cylinder assembly is sleeved on first stage piston bar (25) outer peripheral surface of first stage piston bar assembly; The gland C (4) of cylinder assembly fits tightly with guide sleeve C (23) and the outer peripheral surface of first stage piston bar (25); The inner peripheral surface of the cylinder barrel (24) of cylinder assembly and the outer peripheral surface of first stage piston bar (25) keep gap; The end face of cylinder bottom (42) endoporus of cylinder assembly and the end of first stage piston bar (25) non-boss, second piston rod (26), piston (27) keep gap, and the end face of cylinder bottom (42) endoporus and the end face of first stage piston bar (25) boss and cylinder barrel (24) end face fit tightly.
2. a kind of three grades of telescopic oil cylinders as claimed in claim 1, it is characterized in that, an oilhole of described oil pipe (52) and three grades of piston rod heads (1), three grades of piston rod heads (1) and three grades of piston rods (51) and back-up ring (50) are with the mode that is fixedly connected with of three grades of piston rods (51) and weld.
3. a kind of three grades of telescopic oil cylinders as claimed in claim 1, it is characterized in that, the mode that described piston (27) is fixedly connected with three grades of piston rods (51) is for being threaded.
4. a kind of three grades of telescopic oil cylinders as claimed in claim 1, it is characterized in that, guide ring and dust ring is set with in groove on the inner peripheral surface of described gland A (2), gland B (3) and gland C (4), wherein, dust ring is positioned at gland A (2) gland A (2), gland B (3) and gland C (4) upper close gland A (2), the gland B (3) of three grades of piston rod heads (1) and the end of gland C (4); Wherein, one end of described dust ring is wedge-shaped structure, and described guide ring is the cylindrical body with axial hole of hard.
5. a kind of three grades of telescopic oil cylinders as claimed in claim 1, it is characterized in that, the end of described guide sleeve A (21), guide sleeve B (22), guide sleeve C (23) one end along its be circumferentially with the equally distributed radial groove of two or more and axial hole through, and be all set with seal ring in the groove of the inner peripheral surface of described guide sleeve A (21), guide sleeve B (22) and guide sleeve C (23), outer peripheral surface.
6. a kind of three grades of telescopic oil cylinders as claimed in claim 1, it is characterized in that, described first stage piston bar (25) great circle outer radius portion, second piston rod (26) great circle outer radius portion and the outer peripheral surface of piston (27) be all set with guide ring and combined seal ring.
7. three grades of telescopic oil cylinders as claimed in claim 1 a kind of, is characterized in that, are all set with a seal ring at the groove of the inner peripheral surface of described piston (27) and cylinder bottom (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869626.1U CN204387004U (en) | 2014-12-31 | 2014-12-31 | A kind of three grades of telescopic oil cylinders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869626.1U CN204387004U (en) | 2014-12-31 | 2014-12-31 | A kind of three grades of telescopic oil cylinders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204387004U true CN204387004U (en) | 2015-06-10 |
Family
ID=53359728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420869626.1U Active CN204387004U (en) | 2014-12-31 | 2014-12-31 | A kind of three grades of telescopic oil cylinders |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204387004U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564905A (en) * | 2014-12-31 | 2015-04-29 | 中船重工中南装备有限责任公司 | Three-stage telescopic oil cylinder |
| CN106015165A (en) * | 2016-06-30 | 2016-10-12 | 禹州市神运机械有限公司 | Multistage hydraulic cylinder |
| CN108397442A (en) * | 2018-05-09 | 2018-08-14 | 湖北佳恒科技股份有限公司 | A kind of new structural preset type hydraulic cylinder |
| CN114321091A (en) * | 2022-01-17 | 2022-04-12 | 中国铁建重工集团股份有限公司 | Double-acting multi-stage oil cylinder |
-
2014
- 2014-12-31 CN CN201420869626.1U patent/CN204387004U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564905A (en) * | 2014-12-31 | 2015-04-29 | 中船重工中南装备有限责任公司 | Three-stage telescopic oil cylinder |
| CN106015165A (en) * | 2016-06-30 | 2016-10-12 | 禹州市神运机械有限公司 | Multistage hydraulic cylinder |
| CN108397442A (en) * | 2018-05-09 | 2018-08-14 | 湖北佳恒科技股份有限公司 | A kind of new structural preset type hydraulic cylinder |
| CN114321091A (en) * | 2022-01-17 | 2022-04-12 | 中国铁建重工集团股份有限公司 | Double-acting multi-stage oil cylinder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104564905A (en) | Three-stage telescopic oil cylinder | |
| CN204387004U (en) | A kind of three grades of telescopic oil cylinders | |
| JP2016530438A (en) | Sealing device for piston | |
| JP2013204799A5 (en) | ||
| CN204664046U (en) | A kind of compression type environmental sanitation boats and ships Double Acting Telescopic Hydraulic Cylinder | |
| CN104096771A (en) | Pipe expander | |
| CN203019302U (en) | Piston taking-out device | |
| CN202746322U (en) | Leak-free double-acting multistage hydraulic cylinder | |
| CN104806599A (en) | Boosting type mechanical locking type hydraulic cylinder | |
| JP2017512291A5 (en) | ||
| CN104405720A (en) | Piston-free reciprocating hydraulic cylinder | |
| CN104295560A (en) | Gas-liquid booster with stroke limiting device | |
| CN104564904A (en) | Support oil cylinder | |
| CN105513885A (en) | Internal guiding structure, corrugated pipe assembly and vacuum arc extinguishing chamber | |
| CN203176058U (en) | Oil cylinder front cover limiting mechanism | |
| CN105805080A (en) | Oil cylinder | |
| CN107813943B (en) | Three-stage ejection cylinder | |
| CN203756631U (en) | Hydraulic cylinder capable of reducing liquid compression influences | |
| RU157450U1 (en) | PISTON DIFFERENTIAL COMPRESSOR | |
| RU139682U1 (en) | DEVICE FOR EDITING PIPE END OVALITY | |
| CN203743126U (en) | Double-floating-buffer hydraulic cylinder | |
| US10295059B2 (en) | Cylinder made of composite material for an actuator and corresponding method of production | |
| RU2608162C2 (en) | Translational one-way action volumetric displacement cylinder | |
| WO2014145557A3 (en) | Hydraulic cylinder assembly | |
| CN204253502U (en) | Cylinder piston structure-improved |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |