CN117028361A - Telescopic multistage explosion-proof hydraulic cylinder - Google Patents
Telescopic multistage explosion-proof hydraulic cylinder Download PDFInfo
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- CN117028361A CN117028361A CN202311063361.6A CN202311063361A CN117028361A CN 117028361 A CN117028361 A CN 117028361A CN 202311063361 A CN202311063361 A CN 202311063361A CN 117028361 A CN117028361 A CN 117028361A
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims abstract description 20
- 230000003247 decreasing effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 23
- 210000004907 gland Anatomy 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The application relates to the technical field of hydraulic cylinders, in particular to a telescopic multistage explosion-proof hydraulic cylinder, which comprises an outer cylinder body, wherein multistage inner cylinder bodies with decreasing inner diameters are sequentially nested in the outer cylinder body, a plunger body is nested in the final inner cylinder body, the outer cylinder body, each stage of inner cylinder bodies and the plunger body can be in telescopic movement in an end-to-end mode, a plurality of normal through holes are staggered on the outer side wall of the lower end of each stage of inner cylinder body, an overflow groove is formed on the outer side wall of the lower end of the plunger body, at least one inflow hole is formed on the outer side wall of the lower end of the plunger body, and the inflow hole is communicated with the overflow groove. According to the application, when the internal cylinder body of each stage is disordered and stopped, the situation that the normal through holes are blocked is avoided, and when the hydraulic cylinder is started again, hydraulic oil flows through the normal through holes which are staggered mutually and then enters the oil storage cavity through the overflow grooves and the inflow holes, so that the hydraulic oil can smoothly flow, the situation that the hydraulic cylinder is exploded due to large pressure difference caused by blockage is avoided, and the safety is improved.
Description
Technical Field
The application relates to the technical field of hydraulic cylinders, in particular to a telescopic multistage explosion-proof hydraulic cylinder.
Background
As the self-unloading dregs car of the urban construction active force army plays an increasingly important role in urban construction, the dregs car in China is in a stage of updating and upgrading at present, along with the continuous improvement of the weight limit and environmental protection requirements, the call for weight reduction of the car is increasingly higher, the carriage and the hydraulic lifting system are used as main parts for loading the dregs car, and the weight reduction of the carriage and the hydraulic cylinder is a main way for loading the dregs car, so that I develop a lightweight multi-stage hydraulic cylinder;
when the lightweight multistage hydraulic cylinder is used, the hydraulic oil flowing holes can be blocked when the cylinder bodies in each stage are out of order and are stopped, so that hydraulic oil cannot normally flow, and when the hydraulic cylinder is started again, the pressure difference can cause the situation that the hydraulic cylinder is exploded due to the fact that the wall of each stage of cylinder body is thinner, and therefore, the telescopic multistage explosion-proof hydraulic cylinder is researched and developed again.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a telescopic multi-stage explosion-proof hydraulic cylinder, which solves the problems that when the cylinder bodies in each stage are out of order and stopped, hydraulic oil flow holes are blocked, so that hydraulic oil cannot normally flow, and when the hydraulic cylinder is started again, the hydraulic cylinder is exploded due to the fact that the wall of each stage of cylinder body is thinner, and the pressure difference is caused.
In order to solve the technical problems, the application provides the following technical scheme: a telescopic multistage explosion-proof hydraulic cylinder comprises an outer cylinder body, wherein multistage inner cylinder bodies with gradually decreasing inner diameters are sequentially nested in the outer cylinder body, a plunger body is nested in a final-stage inner cylinder body, and the outer cylinder body, each stage of inner cylinder bodies and the plunger body can be in telescopic movement in an end-to-end mode;
the outer side wall of the lower end of each stage of inner cylinder body is provided with a plurality of normal through holes in a staggered mode, the outer side wall of the lower end of each plunger body is provided with an overflow groove, the outer side wall of the lower end of each plunger body is provided with at least one inflow hole, the inflow holes are communicated with the overflow grooves, the lower end of each plunger body is provided with an oil storage cavity for buffering hydraulic oil, and the outer side wall of each outer cylinder body is provided with a first oil port and a second oil port.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: the plurality of normal through holes are circumferentially staggered on the outer side wall of the lower end of the inner cylinder body of each stage.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: annular positioning tables are arranged on the outer side walls of the lower ends of the inner cylinder bodies and the plunger bodies at all levels, annular grooves are formed in the positioning tables, first supporting rings are sleeved in the annular grooves, and a plurality of the first supporting rings are respectively abutted against the inner side walls of the outer cylinder bodies and the inner cylinder bodies at all levels.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: the gap between the positioning table and the outer cylinder body and the gap between the positioning table and the inner cylinder bodies of all levels are 0.5-1.5 mm.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: and one side of the positioning table, which is close to the normal through hole, is provided with a cone angle part.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: annular grooves are formed in the inner side walls of the outer cylinder body and the inner cylinder bodies of all levels, clamping keys are sleeved in the annular grooves, and the clamping keys are used for limiting the strokes of the inner cylinder bodies of all levels and the plunger bodies;
the cone angle part is provided with a groove part and a protruding part, the clamping key is abutted in the groove part, and the protruding part is abutted between the clamping key and the inner cylinder body.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: the hydraulic oil cylinder is characterized in that a sealing ring is arranged in a gap between the outer cylinder body and each stage of inner cylinder body and the plunger body, the upper surface and the lower surface of the sealing ring are used as sealing surfaces, an L-shaped ring is arranged on one side of the sealing ring bearing hydraulic oil, the L-shaped ring is abutted to a clamping key, and a double-layer spiral retainer ring is arranged between the sealing ring and the L-shaped ring.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: the back pressure side of the sealing ring is provided with a second supporting ring, and the second supporting ring is used for limiting the position of the sealing ring;
the thicknesses of the L-shaped ring and the second supporting ring are equal to the gaps between the outer cylinder body and each stage of inner cylinder body and the plunger body.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: the outer cylinder body and the outer side walls of the upper ends of the inner cylinder bodies of all stages are respectively sleeved with a gland, a trapezoid groove is formed in the gland, dust rings are arranged in the trapezoid groove, and the dust rings are respectively abutted to the outer side walls of the inner cylinder bodies of all stages and the plunger bodies.
As a preferable scheme of the telescopic multistage explosion-proof hydraulic cylinder, the application comprises the following steps: earrings are arranged at the lower end of the outer cylinder body and the upper end of the plunger body;
the outer side walls of the lower ends of the inner cylinders of all levels are embedded with protective rings, and the protective rings are abutted to the positioning tables.
By means of the technical scheme, the application provides the telescopic multistage explosion-proof hydraulic cylinder, which has at least the following beneficial effects:
1. this telescopic multistage explosion-proof pneumatic cylinder has improved cylinder body and plunger body in the cylinder in the all levels, a plurality of normal through-holes of crisscross setting on the cylinder body in the all levels, set up overflow launder, inflow hole and oil storage chamber on the plunger body, in the use, the condition that will normally through-hole plug can not appear in the time of stopping appears in the cylinder body in each level, when starting the pneumatic cylinder again, hydraulic oil can flow through from each normal through-hole of crisscross each other, then enter into the oil storage intracavity through overflow launder and inflow hole, hydraulic oil can smooth and easy flow, avoid because the jam causes the pressure differential great to lead to the condition emergence of explosion-proof jar to appear in the pneumatic cylinder, the security has been improved.
2. The telescopic multistage explosion-proof hydraulic cylinder is characterized in that the L-shaped ring is abutted on the clamping key, the thin edge of the L-shaped ring can fill a gap between the clamping key and each stage of inner cylinder body, the problem that the clamping key is easy to fall off in the conventional hydraulic cylinder is solved, and the strokes of each stage of inner cylinder body and the plunger body can be limited through the arrangement of the clamping key.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, illustrate and together with the description serve to explain a part of the application:
FIG. 1 is a schematic diagram of the structure of the present application;
FIG. 2 is a schematic view of a partial enlarged structure at A in FIG. 1 according to the present application;
fig. 3 is a schematic view of a partial enlarged structure at B of fig. 1 in the present application.
In the figure: 1. an outer cylinder; 2. an inner cylinder; 3. a plunger body; 4. a positioning table; 5. a first support ring; 6. a taper angle portion; 7. a clamping key; 8. a seal ring; 9. an L-ring; 10. a double-layer spiral retainer ring; 11. a second support ring; 12. a gland; 13. a dust ring; 14. a normal through hole; 15. an overflow trough; 16. an inflow hole; 17. an oil storage chamber; 18. a first oil port; 19. a second oil port; 20. ear rings; 21. and a protective ring.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
At present, when the lightweight multistage hydraulic cylinder is used, disordered sequence and middle stop of cylinder bodies in each stage occur, hydraulic oil flowing holes can be blocked, so that hydraulic oil cannot normally flow, and when the hydraulic cylinder is started again, the pressure difference can cause the condition that the hydraulic cylinder is exploded due to the fact that the cylinder walls of each stage are thinner.
In order to solve the above-mentioned problems, the present application provides a telescopic multi-stage explosion-proof hydraulic cylinder, fig. 1 is a schematic structural diagram of the present application, fig. 2 is a schematic partial enlarged structural diagram of a portion a of fig. 1 of the present application, fig. 3 is a schematic partial enlarged structural diagram of a portion B of fig. 1 of the present application, and the following detailed descriptions will be given respectively, but the following description is not to be construed as limiting the preferred sequence of the present application.
As shown in fig. 1, the telescopic multistage explosion-proof hydraulic cylinder comprises an outer cylinder body 1, wherein multistage inner cylinder bodies 2 with decreasing inner diameters are sequentially nested in the outer cylinder body 1, plunger bodies 3 are nested in the final inner cylinder bodies 2, the outer cylinder bodies 1, the inner cylinder bodies 2 and the plunger bodies 3 at all stages can be in telescopic movement in an end-to-end mode, the inner side walls of the outer cylinder bodies 1, the inner side walls of the inner cylinder bodies 2 at all stages and the outer side walls of the plunger bodies 3 are used as sealing surfaces, sealing grooves are not required to be formed in the cylinder bodies to weaken the strength of the cylinder bodies, the effect of reducing the wall thickness of the cylinder bodies and reducing the weight is achieved, and the design of light weight is achieved, so that the weight reducing requirement of the self-discharging slag-earth vehicle is met.
The telescopic multi-stage explosion-proof hydraulic cylinder can cover cylinders with the model number of seven or more, and each cylinder can be matched arbitrarily to form a plurality of light hydraulic cylinders with different diameters and different stages, and cover all vehicle types with different sizes.
As shown in fig. 1 and 2, the outer side wall of the lower end of each stage of inner cylinder body 2 is provided with a plurality of normal through holes 14 in a staggered manner, the plurality of normal through holes 14 are arranged on the outer side wall of the lower end of each stage of inner cylinder body 2 in a staggered manner, the outer side wall of the lower end of each plunger body 3 is provided with an overflow groove 15, the outer side wall of the lower end of each plunger body 3 is provided with at least one inflow hole 16, the inflow holes 16 are communicated with the overflow grooves 15, the lower end of each plunger body 3 is provided with an oil storage cavity 17 for buffering hydraulic oil, each stage of inner cylinder body 2 and each plunger body 3 of the hydraulic cylinder are improved, the plurality of normal through holes 14 are arranged on each stage of inner cylinder body 2 in a staggered manner, the overflow grooves 15, the inflow holes 16 and the oil storage cavity 17 are arranged on each plunger body 3 in a staggered manner, when the normal through holes 14 are blocked in each stage of inner cylinder body 2 in a disordered manner, when the hydraulic cylinder is started up again, the hydraulic oil flows through each normal through the mutually staggered normal through holes 14, and then enters the oil storage cavity 17, and the smooth flow of the hydraulic oil can be avoided, the situation that the hydraulic oil is caused by the pressure difference is large, and the occurrence of explosion is avoided, and safety is improved.
As shown in fig. 1, the outer side wall of the outer cylinder body 1 is provided with a first oil port 18 and a second oil port 19, and due to the design of the double oil ports, the flow of hydraulic oil can be doubled, the running speed of the hydraulic cylinder is faster, and the efficiency is higher.
As shown in fig. 1 and 2, the outer side walls of the lower ends of the inner cylinder bodies 2 and the plunger bodies 3 of all stages are respectively provided with an annular positioning table 4, the gap between the positioning table 4 and the outer cylinder body 1 and between the positioning table 4 and the inner cylinder bodies 2 of all stages is 0.5-1.5 mm, the positioning table 4 is provided with an annular groove, a first supporting ring 5 is sleeved in the annular groove, and a plurality of first supporting rings 5 are respectively abutted against the inner side walls of the outer cylinder body 1 and the inner cylinder bodies 2 of all stages.
As shown in fig. 1 and 2, a taper angle part 6 is arranged on one side of the positioning table 4, which is close to the normal through hole 14, annular grooves are formed in the inner side walls of the outer cylinder body 1 and each stage of inner cylinder body 2, a clamping key 7 is sleeved in each annular groove, the clamping key 7 is used for limiting the strokes of each stage of inner cylinder body 2 and the plunger body 3, the taper angle part 6 is provided with a groove part and a protruding part, the clamping key 7 is abutted in the groove part, the protruding part is abutted between the clamping key 7 and the inner cylinder body 2, the taper angle part 6 is designed on the positioning table 4, and when the hydraulic cylinder runs to the stroke end, the taper angle part 6 is attached to the clamping key 7, so that the phenomenon of edge tilting of the clamping key 7 caused by collision is prevented.
As shown in fig. 1 and 3, a seal ring 8 is provided in a gap between the outer cylinder 1 and each stage of inner cylinder 2 and the plunger body 3, the upper and lower surfaces of the seal ring 8 are used as seal surfaces, an L-shaped ring 9 is provided on the side of the seal ring 8 receiving hydraulic oil, the L-shaped ring 9 is abutted against the clamping key 7, the gap between the clamping key 7 and each stage of inner cylinder 2 can be filled with a thin edge of the L-shaped ring 9, the problem that the clamping key 7 easily falls off in the conventional hydraulic cylinder is solved, and the stroke of each stage of inner cylinder 2 and plunger body 3 can be limited by the clamping key 7.
As shown in fig. 1 and 3, a double-layer spiral retainer ring 10 is arranged between the sealing ring 8 and the L-shaped ring 9, and the double-layer spiral retainer ring 10 can prevent the L-shaped ring 9 from excessively extruding the sealing ring 8, so that the service life of the sealing ring 8 is prolonged.
As shown in fig. 1 and 3, the back pressure side of the sealing ring 8 is provided with a second supporting ring 11, the second supporting ring 11 is used for limiting the position of the sealing ring 8, the thicknesses of the L-shaped ring 9 and the second supporting ring 11 are equal to the clearance between the outer cylinder body 1 and each stage of inner cylinder body 2 and the plunger body 3, and the sealing effect is enhanced.
As shown in fig. 1 and 3, the outer side walls of the upper ends of the outer cylinder body 1 and the inner cylinder body 2 of each stage are respectively sleeved with a gland 12, a trapezoid groove is formed in the gland 12, a dustproof ring 13 is arranged in the trapezoid groove, the dustproof rings 13 are respectively abutted to the outer side walls of the inner cylinder body 2 of each stage and the plunger body 3, the upper ends of the outer cylinder body 1 and the inner cylinder body 2 of each stage can be wrapped by the gland 12, the strength of the upper ends of the outer cylinder body 1 and the inner cylinder body 2 of each stage is enhanced, meanwhile, the assembly, maintenance and replacement of the inner cylinder body 2 of each stage, the clamping key 7, the sealing ring 8, the L-shaped ring 9, the double-layer spiral retainer ring 10 and the second support ring 11 are facilitated, and the use effect is improved.
As shown in fig. 1, the lower end of the outer cylinder body 1 and the upper end of the plunger body 3 are both provided with an ear ring 20, and the hydraulic cylinder is convenient to install and fix through the ear ring 20.
As shown in fig. 1 and 2, the outer side walls of the lower ends of the inner cylinders 2 of each stage are embedded with protection rings 21, the protection rings 21 are abutted against the positioning table 4, and when the hydraulic cylinder runs to the end of the stroke, the plurality of protection rings 21 can protect the lower ends of the inner cylinders 2 of each stage.
The present embodiment has been described in detail with reference to the accompanying drawings. From the above description, a person skilled in the art should clearly know a telescopic multi-stage explosion-proof hydraulic cylinder according to the present application. According to the application, the inner cylinder body 2 and the plunger body 3 of each level of the hydraulic cylinder are improved, a plurality of normal through holes 14 are arranged on the inner cylinder body 2 of each level in a staggered manner, and the overflow grooves 15, the inflow holes 16 and the oil storage cavity 17 are arranged on the plunger body 3, so that when the inner cylinder body 2 of each level is disordered and stopped in use, the situation that the normal through holes 14 are blocked is avoided, hydraulic oil flows through the normal through holes 14 which are mutually staggered in the restarting of the hydraulic cylinder, and then enters the oil storage cavity 17 through the overflow grooves 15 and the inflow holes 16, so that the hydraulic oil can smoothly flow, the situation that the hydraulic cylinder is exploded due to large pressure difference caused by blockage is avoided, and the safety is improved.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a multistage explosion-proof pneumatic cylinder of telescopic, includes outer cylinder body (1), its characterized in that: the outer cylinder body (1) is internally sequentially nested with a multi-stage inner cylinder body (2) with decreasing inner diameter, the last-stage inner cylinder body (2) is internally nested with a plunger body (3), and the outer cylinder body (1), each stage of inner cylinder body (2) and the plunger body (3) can be in end-to-end telescopic movement;
the outer side wall of the lower end of each stage of inner cylinder body (2) is provided with a plurality of normal through holes (14) in a staggered mode, the outer side wall of the lower end of each plunger body (3) is provided with an overflow groove (15), the outer side wall of the lower end of each plunger body (3) is provided with at least one inflow hole (16), the inflow holes (16) are communicated with the overflow grooves (15), the lower end of each plunger body (3) is provided with an oil storage cavity (17) for buffering hydraulic oil, and the outer side wall of each outer cylinder body (1) is provided with a first oil port (18) and a second oil port (19).
2. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 1, wherein: the plurality of normal through holes (14) are circumferentially staggered on the outer side wall of the lower end of each stage of inner cylinder body (2).
3. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 1, wherein: the outer side walls of the lower ends of the inner cylinder bodies (2) and the plunger bodies (3) of all levels are respectively provided with an annular positioning table (4), the positioning tables (4) are provided with annular grooves, first supporting rings (5) are sleeved in the annular grooves, and a plurality of the first supporting rings (5) are respectively abutted against the inner side walls of the outer cylinder bodies (1) and the inner cylinder bodies (2) of all levels.
4. A telescopic multi-stage explosion-proof hydraulic cylinder according to claim 3, wherein: the gap between the positioning table (4) and the outer cylinder body (1) and the gap between the positioning table and each stage of inner cylinder body (2) are 0.5-1.5 mm.
5. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 4, wherein: one side of the positioning table (4) close to the normal through hole (14) is provided with a cone angle part (6).
6. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 5, wherein: annular grooves are formed in the inner side walls of the outer cylinder body (1) and the inner cylinder bodies (2) of each stage, clamping keys (7) are sleeved in the annular grooves, and the clamping keys (7) are used for limiting the strokes of the inner cylinder bodies (2) and the plunger bodies (3) of each stage;
the cone angle part (6) is provided with a groove part and a protruding part, the clamping key (7) is abutted in the groove part, and the protruding part is abutted between the clamping key (7) and the inner cylinder body (2).
7. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 6, wherein: the novel hydraulic oil cylinder is characterized in that a sealing ring (8) is arranged in a gap between the outer cylinder body (1) and each stage of inner cylinder body (2) and the plunger body (3), the upper surface and the lower surface of the sealing ring (8) are used as sealing surfaces, an L-shaped ring (9) is arranged on one side of the sealing ring (8) bearing hydraulic oil, the L-shaped ring (9) is abutted to a clamping key (7), and a double-layer spiral check ring (10) is arranged between the sealing ring (8) and the L-shaped ring (9).
8. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 7, wherein: the back pressure side of the sealing ring (8) is provided with a second supporting ring (11), and the second supporting ring (11) is used for limiting the position of the sealing ring (8);
the thicknesses of the L-shaped ring (9) and the second supporting ring (11) are equal to the clearance between the outer cylinder body (1) and each stage of inner cylinder body (2) and the plunger body (3).
9. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 1, wherein: the novel anti-dust device is characterized in that the outer side walls of the upper ends of the outer cylinder body (1) and the inner cylinder bodies (2) at all levels are respectively sleeved with a gland cover (12), each gland cover (12) is internally provided with a trapezoid groove, each trapezoid groove is internally provided with a dust ring (13), and the dust rings (13) are respectively abutted to the outer side walls of the inner cylinder bodies (2) and the plunger bodies (3) at all levels.
10. The telescopic multi-stage explosion-proof hydraulic cylinder according to claim 1, wherein: the lower end of the outer cylinder body (1) and the upper end of the plunger body (3) are respectively provided with an earring (20);
the outer side walls of the lower ends of the inner cylinders (2) of all levels are embedded with protective rings (21), and the protective rings (21) are abutted to the positioning table (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311063361.6A CN117028361A (en) | 2023-08-22 | 2023-08-22 | Telescopic multistage explosion-proof hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311063361.6A CN117028361A (en) | 2023-08-22 | 2023-08-22 | Telescopic multistage explosion-proof hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN117028361A true CN117028361A (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311063361.6A Pending CN117028361A (en) | 2023-08-22 | 2023-08-22 | Telescopic multistage explosion-proof hydraulic cylinder |
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| JP2002263819A (en) * | 2001-03-09 | 2002-09-17 | Nissei Plastics Ind Co | Injection plunger with ring valve for molding metal material |
| CN212455046U (en) * | 2020-05-07 | 2021-02-02 | 山东万通液压股份有限公司 | Multistage explosion-proof pneumatic cylinder |
| CN214661236U (en) * | 2021-01-26 | 2021-11-09 | 上海齐宇机电设备有限公司 | Multi-stage plunger oil cylinder |
| CN219366454U (en) * | 2022-12-29 | 2023-07-18 | 山东万通液压股份有限公司 | Single-acting telescopic light-weight sleeve cylinder |
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2023
- 2023-08-22 CN CN202311063361.6A patent/CN117028361A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09287560A (en) * | 1996-04-19 | 1997-11-04 | Sanyo Electric Co Ltd | Multistage compression device |
| JP2002263819A (en) * | 2001-03-09 | 2002-09-17 | Nissei Plastics Ind Co | Injection plunger with ring valve for molding metal material |
| CN212455046U (en) * | 2020-05-07 | 2021-02-02 | 山东万通液压股份有限公司 | Multistage explosion-proof pneumatic cylinder |
| CN214661236U (en) * | 2021-01-26 | 2021-11-09 | 上海齐宇机电设备有限公司 | Multi-stage plunger oil cylinder |
| CN219366454U (en) * | 2022-12-29 | 2023-07-18 | 山东万通液压股份有限公司 | Single-acting telescopic light-weight sleeve cylinder |
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