CN112855662A - Method for improving multi-stage cylinder - Google Patents
Method for improving multi-stage cylinder Download PDFInfo
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- CN112855662A CN112855662A CN202110240833.5A CN202110240833A CN112855662A CN 112855662 A CN112855662 A CN 112855662A CN 202110240833 A CN202110240833 A CN 202110240833A CN 112855662 A CN112855662 A CN 112855662A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 54
- 230000000670 limiting effect Effects 0.000 claims description 41
- 210000004907 gland Anatomy 0.000 claims description 23
- 238000001125 extrusion Methods 0.000 claims description 7
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 230000009975 flexible effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- F15B15/1428—Cylinders
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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
- F15B15/1438—Cylinder to end cap assemblies
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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
- F15B15/1457—Piston rods
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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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses an improvement method of a multistage cylinder, wherein a limit clamp key is embedded and clamped at the inner side of a clamp key fit groove, limit flanges are arranged at the positions of the edge parts of the limit clamp key, which are positioned at the inner side of the clamp key fit groove, a baffle ring is embedded and connected at the position of the edge part of the limit clamp key, the position of the inner side of a telescopic chamber, which is positioned at the edge part of the baffle ring, is fixedly bonded with a fixed sealing seat, and the edge part of the fixed sealing seat is fixedly bonded with an elastic sealing seat. The use of the multi-stage cylinder can meet the current use requirement.
Description
Technical Field
The invention relates to the technical field of hydraulic telescopic cylinders, in particular to an improvement method of a multi-stage cylinder.
Background
The multi-stage cylinder is also called as a telescopic hydraulic cylinder, is formed by sleeving two-stage or multi-stage piston cylinders and mainly comprises parts such as a guide sleeve, a cylinder barrel, a sleeve and a piston, and the multi-stage cylinder can reach a longer stroke than the single-stage cylinder in a limited space due to compact structure, so that the multi-stage cylinder is widely applied and is suitable for occasions with long stroke requirements due to limited installation space;
the existing multi-stage cylinder guide sleeve is designed by adopting threaded connection and clamping key connection, has the advantages of stronger universality and higher processing requirement, larger installation space requirement and troublesome assembly, but sometimes some multi-stage cylinders have certain limitation on space size due to design requirement, and if the problem of space limitation is not solved, the application range of the multi-stage cylinder is also bound with the limitation, so that the structural design of the multi-stage cylinder is very important.
Disclosure of Invention
The invention provides an improved method of a multi-stage cylinder, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a multistage cylinder guide sleeve comprises a first-stage cylinder barrel, wherein a second-stage cylinder barrel is sleeved at the inner side edge of the first-stage cylinder barrel, a third-stage cylinder barrel is sleeved at the inner side edge of the second-stage cylinder barrel, a fourth-stage cylinder barrel is sleeved at the inner side edge of the third-stage cylinder barrel, a piston rod is sleeved at the inner side edge of the fourth-stage cylinder barrel, and telescopic chambers are formed in the inner sides of the first-stage cylinder barrel and the second-stage cylinder barrel, the inner sides of the second-stage cylinder barrel and the third-stage cylinder barrel, the inner sides of the third-stage cylinder barrel and the fourth-stage cylinder barrel, and;
the inner side ends of the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the piston rod are respectively provided with a clamping key fit groove, a limiting clamping key is embedded and clamped in the inner side of the clamping key fit groove, limiting flanges are arranged at positions, located on the inner side of the clamping key fit groove, of the limiting clamping key edge, a baffle ring is embedded and connected at a position, located on the limiting clamp key edge, of the inner side of the telescopic chamber, a fixed sealing seat is fixedly bonded at a position, located on the baffle ring edge, of the inner side of the telescopic chamber, an elastic sealing seat is fixedly bonded at the fixed sealing seat edge, and a supporting sleeve ring is fixedly connected at a position, located on one side edge;
the pressure disk has been cup jointed respectively to the junction between first order cylinder and second level cylinder, second level cylinder and third level cylinder, third level cylinder and fourth level cylinder, fourth level cylinder and the piston rod, the inboard limit of pressure disk is close to and supports lantern ring department and has seted up the screw, the inboard embedding of screw agrees with to be connected with the extrusion sealing pad, the inside side end of pressure disk is fixed to be bonded with the seal ring and keeps off.
Preferably, the limit flange edge part is tightly attached to the card key fitting groove edge part, and the cross sections of the limit card key and the card key fitting groove are in right trapezoid shapes.
Preferably, a small gap is formed between the pressing ring and the first-stage cylinder barrel and between the pressing ring and the pressing cover; the pressing ring is tightly attached to the end part of the inner side of the gland; the gland compresses the compression ring () to prevent the seal from moving.
Preferably, there is holding bolt in gland outside middle part threaded connection department, holding bolt runs through in the gland, and every grade of cylinder respectively with every grade of gland through the thread tightening connection back, all need with holding bolt fastening, prevent that the gland from becoming flexible.
Preferably, the inner side of the fourth-stage cylinder barrel is movably connected with a piston rod, the end part of the piston rod is connected with a connecting column, and the middle part of the inner side of the connecting column is provided with a fixing pin hole.
An improved method of a multi-stage cylinder specifically comprises the following steps:
s1, turning a groove;
s2, sealing the piston;
s3, installing a clamp key;
s4, limiting;
s5, sealing;
and S6, fixing and limiting.
Based on the above technical solution, in S1, before the multi-stage cylinder is assembled, the inner side edges of the respective stages of cylinder barrels are respectively machined with the snap key engagement grooves in the shape of a right trapezoid by a turning machine;
in S2, sealing the side portions of the respective cylinder bores with the seal members during assembly;
in S3, the piston rod is firstly installed into the fourth-stage cylinder barrel according to a certain sequence, then the limiting clamp key is pushed into the clamp key fit along the cavity on the inner side of the fourth-stage cylinder barrel, the end face of the limiting clamp key is ensured to be closely fit with the end face of the clamp key fit groove, and after one-stage assembly is completed, the clamp keys are sequentially installed into the cylinder barrels according to the sequence.
According to the technical scheme, in the step S4, after the limit clamp key is accurately installed, the baffle ring 10 is pushed into the cavity, and the edge part of the baffle ring is tightly fit with the edge end of the limit clamp key;
in the step S5, after the baffle ring is installed, the fixed sealing seat and the elastic sealing seat are sequentially pushed into the cavity, and finally the pressing ring is pushed into the end part of the cavity;
in S6, after the press ring is installed, the press cover is fixedly installed at the joint of each stage of cylinder barrel through threads, so that the sealing piece can be prevented from moving, and the press cover is tightly connected with the cylinder barrel through the fastening bolt, so that the anti-loosening effect is achieved.
Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use:
1. through using spacing card key, keep off the ring, the sealing member, the clamping ring, traditional uide bushing structural style is replaced to this kind of mounting form of gland, the space has been saved in the practical application in-process, the problem that the use of multistage jar received space restriction among the prior art has been solved, the pneumatic cylinder long stroke has been satisfied, in the time of short installation distance, the requirement of hydro-cylinder overall dimension has been reduced, design to some space restriction requirements has provided more possibilities, the application range of multistage jar has been expanded, make the use of multistage jar can satisfy in the user demand of present.
In the practical application process, the clamping key needs to be made of steel with good plasticity and toughness, so that the clamping key is convenient to install on one hand, and is not easy to break when bearing external force on the other hand. The clamping key fit groove and the right trapezoid structure of the limiting clamping key not only can enable the limiting clamping key to form a limiting effect on the fixed sealing element, but also can bear larger thrust inside the cylinder barrel, and further guarantee the stability of the cylinder barrels in the telescopic process;
2. in the practical application process, a sealing structure formed by a limiting clamp key, a gland fixing sealing element and a piston seal together enables the cylinders to have a multi-stage sealing structure after being connected, so that the connection tightness between the cylinders is ensured, and meanwhile, the stability of the operation of the multi-stage cylinder is ensured by fixing and preventing looseness of the connection part of the pressure plate;
3. through the uide bushing structure that uses spacing card key, card key agree with groove, fender ring, sealing member, clamping ring, gland to form, not only make each component parts simple and convenient more in actual installation and maintenance process, improved the actual packaging efficiency of this multistage jar simultaneously, reduced the processing cost of part, and the discovery problem that more can be audio-visual when the product breaks down, convenient in time solve the problem, the practicality is strong.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of a key-engaging groove of the present invention;
FIG. 4 is a side view of the limit catch of the present invention;
FIG. 5 is a cross-sectional view of a limit catch of the present invention;
FIG. 6 is a flow chart of the steps of the method of the present invention;
reference numbers in the figures: 1. a first stage cylinder; 2. a second stage cylinder; 3. a third stage cylinder; 4. a fourth stage cylinder; 5. a piston rod; 6. a telescoping chamber; 7. the clamping key is matched with the groove; 8. a limiting clamp key; 9. limiting and blocking edges; 10. a baffle ring; 11. fixing a sealing seat; 12. an elastic sealing seat; 13. pressing a ring; 14. a gland; 15. tightly nailing the bolt; 17. a dust ring; 18. connecting columns; 19. and fixing the pin hole.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1-5, the invention provides a technical scheme, a multi-stage cylinder guide sleeve, which comprises a first-stage cylinder barrel 1, wherein the inner side edge part of the first-stage cylinder barrel 1 is sleeved with a second-stage cylinder barrel 2, the inner side edge part of the second-stage cylinder barrel 2 is sleeved with a third-stage cylinder barrel 3, the inner side edge part of the third-stage cylinder barrel 3 is sleeved with a fourth-stage cylinder barrel 4, the inner side edge part of the fourth-stage cylinder barrel 4 is sleeved with a piston rod 5, and telescopic chambers 6 are respectively arranged on the inner sides of the first-stage cylinder barrel 1 and the second-stage cylinder barrel 2, the inner sides of the second-stage cylinder barrel 2 and the third-stage cylinder barrel 3, the inner sides of;
the inner side limiting parts of the first-stage cylinder barrel 1, the second-stage cylinder barrel 2, the third-stage cylinder barrel 3 and the fourth-stage cylinder barrel 4 are respectively provided with a clamping key conjunction groove 7, the inner side of the clamping key conjunction groove 7 is provided with a limiting step, the end part of a limiting clamping key 8 is embedded into the limiting step of the clamping key conjunction groove 7 to play a limiting role, the cross sections of the limiting clamping key (8) and the clamping key conjunction groove (7) are both in a right trapezoid shape, and the tightness after conjunction connection between the limiting clamping key (8) and the clamping key conjunction groove (7) is ensured, meanwhile, the inclined edge of the right trapezoid is utilized to ensure that the stress area of the limit clamp key (8) is gradually increased, further ensuring the stability of the clamp key (8), embedding a retaining ring 10 with a supporting function at the end part of the limiting clamp key 8 at the inner side of the telescopic cavity, placing sealing elements 11 and 12 with a sealing function at the end part of the retaining ring at the inner side of the telescopic cavity, and placing a compression ring 13 with a supporting function at the end part of the sealing element 12; the outer side ends of the first-stage cylinder barrel 1, the second-stage cylinder barrel 2, the third-stage cylinder barrel 3 and the fourth-stage cylinder barrel 4 are respectively provided with a gland 14 for positioning; the end part of the gland 14 is provided with a dustproof ring 17; the gland 14 is externally provided with a screw 15 for preventing looseness.
There is tight set bolt (15) in gland (14) outside middle part threaded connection department, and tight set bolt (15) run through in the gland, and every grade of cylinder respectively with every grade of gland through the screw thread fixed connection back, all need be fixed with tight set bolt, prevent that the gland is not hard up.
The inner side of the fourth-stage cylinder barrel is movably connected with a piston rod 5, the end part of the piston rod 5 is connected with a connecting column 18, and the middle part of the inner side of the connecting column 18 is provided with a fixing pin hole 19.
As shown in fig. 6, an improved method of a multi-stage cylinder specifically includes the following steps:
s1, turning a groove;
s2, sealing the piston;
s3, installing a clamp key;
s4, limiting;
s5, sealing;
and S6, fixing and limiting.
Based on the above technical solution, in S1, before assembling the multi-stage cylinder, the key-engaging grooves 7 in the shape of a right trapezoid are respectively machined on the inner side edges of the respective stages of cylinder barrels by a turning machine;
at S2, sealing the edges of the respective stages of the cylinder tubes with the seal members at the time of assembly;
in S3, the piston rod is firstly installed into the fourth-stage cylinder barrel according to a certain sequence, then the limiting clamp key 8 is pushed into the clamp key matching groove 7 along the cavity on the inner side of the fourth-stage cylinder barrel, the end face of the limiting clamp key 8 is ensured to be tightly matched with the end face of the clamp key matching groove 7, and after the first-stage assembly is completed, the clamp keys 8 are sequentially installed into the cylinder barrels according to the sequence.
According to the technical scheme, in the step S4, after the limit clamp key 8 is accurately installed, the baffle ring 10 is pushed into the cavity, and the edge part of the baffle ring 10 is tightly fit with the edge end of the limit clamp key 8;
in S5, after the baffle ring 10 is installed, the fixed seal seat 11 and the elastic seal seat 12 are sequentially pushed into the cavity, and finally the press ring 13 is pushed into the end part of the cavity;
in S6, after the press ring 13 is mounted, the press cover 14 is fixedly mounted at the joint of each stage of the cylinder by screw threads, so that the seal member can be prevented from moving, and the tightening bolt connects the cylinder and the press cover to play a role in preventing looseness.
The working principle and the using process of the invention are as follows: in the actual assembly process of the multi-stage cylinder, firstly, a first-stage cylinder barrel 1, a second-stage cylinder barrel 2, a third-stage cylinder barrel 3, a fourth-stage cylinder barrel 4 and a piston rod 5 are sequentially assembled, after the assembly among the various stages of cylinder barrels is finished, piston sealing treatment is carried out among the various stages of cylinder barrels through external sealing parts, and the piston rod 23 is arranged on the inner side of the piston rod 5;
then, after the assembly among the cylinder barrels is completed, the limiting clamp key 8 is slowly pushed into the clamp key fit groove 7 along the telescopic cavity 6 among the cylinder barrels, the limiting flange 9 at the edge of the limiting clamp key 8 is ensured to be just embedded into the clamp key fit groove 7, the edge of the limiting clamp key 8 is ensured to be tightly fit with the inner edge of the clamp key fit groove 7, the baffle ring 10 is pushed into the cavity after the limiting clamp key 8 is connected, the edge of the baffle ring 10 is enabled to be tightly fit with the edge end of the limiting clamp key 8, the fixed sealing seat 11 and the elastic sealing seat 12 are sequentially pushed into the telescopic cavity 6, and the edges among the baffle ring 10, the fixed sealing seat 11 and the elastic sealing seat 12 are enabled to be tightly fit;
after the interior of each stage of cylinder barrel is preliminarily sealed through the fixed sealing seat 11 and the elastic sealing seat 12, the supporting sleeve ring 13 is pushed into the telescopic chamber 6, the pressure plate 14 is sleeved at the joint of the outer sides of each stage of cylinder barrel, the fixed position of the pressure plate 14 is adjusted by moving the pressure plate 14 after the pressure plate 14 is sleeved at the outer side of each stage of cylinder barrel, after the position of the pressure plate 14 is determined, the fastening bolt 22 is rotated, the pressure plate 14 and the cylinder sleeves at the corresponding positions of the pressure plate 14 are fixed through the fastening bolt 22, and further, the tightness of the edge of each stage of cylinder barrel is ensured;
in the moving, adjusting and fixing processes of the pressure plate 14, the extrusion rubber ring 18 is extruded through the pressure plate 14, after the extrusion rubber ring 18 is extruded, sealing grease inside the extrusion rubber ring 18 can be extruded out of the extrusion opening 21 and is counted into the sealing gear shift 17, and the sealing ring stop 17 is made of sponge, so that the sealing grease can be absorbed by the sealing ring stop 17, an oil seal structure is formed on the edge of the pressure plate 14 through the saturated sealing ring stop 17, and the edge of the pressure plate 14 is ensured to have higher sealing performance after being connected with the edge of each stage of cylinder barrel;
in addition, the multistage cylinder is in the practical application in-process, conveniently be connected piston rod 23 fast and between the installation component through spliced pole 24 and fixed pinhole 25, so that the multistage cylinder can use fast, guarantee the packaging efficiency of multistage cylinder, when flexible activity between each cylinder jacket of multistage cylinder, through fixed seal seat 11, elastic seal seat 12, the elastic action of extrusion seal 16 and seal ring fender 17, can be when the activity is flexible between the cylinder barrels at different levels, provide the buffering to the junction between them, and then guarantee the stability when flexible activity between them, and then guarantee the security of multistage cylinder whole use.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a multistage jar uide bushing, includes first order cylinder (1), second level cylinder (2) have been cup jointed to first order cylinder (1) inboard limit portion, third level cylinder (3) have been cup jointed to second level cylinder (2) inboard limit portion, third level cylinder (3) inboard limit portion has cup jointed fourth level cylinder (4), piston rod (5), its characterized in that have been cup jointed to fourth level cylinder (4) inboard limit portion: telescopic chambers (6) are respectively arranged on the inner sides of the first-stage cylinder barrel (1) and the second-stage cylinder barrel (2), the inner sides of the second-stage cylinder barrel (2) and the third-stage cylinder barrel (3), the inner sides of the third-stage cylinder barrel (3) and the fourth-stage cylinder barrel (4), and the inner sides of the fourth-stage cylinder barrel (4) and the piston rod (5);
the inner side ends of the first-stage cylinder barrel (1), the second-stage cylinder barrel (2), the third-stage cylinder barrel (3), the fourth-stage cylinder barrel (4) and the piston rod (5) are all provided with clamping key conjunction grooves (7), the inner side of the clamping key conjunction groove (7) is embedded and clamped with a limiting clamping key (8), the edge part of the limiting clamping key (8) is provided with a limiting flange (9) at the inner side position of the clamping key conjunction groove (7), a baffle ring (10) is embedded and connected at the position of the inner side of the telescopic cavity (6) which is positioned at the edge part of the limit clamp key (8), a fixed sealing seat (11) is fixedly bonded at the position of the inner side of the telescopic chamber (6) which is positioned at the edge part of the baffle ring (10), an elastic sealing seat (12) is fixedly bonded at the edge part of the fixed sealing seat (11), a supporting lantern ring (13) is fixedly connected to the position of the edge of the elastic sealing seat (12) at one side end of the telescopic chamber (6);
pressure disk (14) have been cup jointed respectively to first order cylinder (1) and second level cylinder (2), second level cylinder (2) and third level cylinder (3), third level cylinder (3) and fourth level cylinder (4), fourth level cylinder (4) and the junction between piston rod (5), pressure disk (14) inboard side end is close to support lantern ring (13) department and has seted up screw (15), screw (15) inboard embedding agrees with to be connected with extrusion sealing pad (16), pressure disk (14) inside side end is fixed to be bonded with seal ring fender (17).
2. The multi-stage cylinder guide sleeve of claim 1, wherein: the edge of the limiting flange (9) is tightly attached to the edge of the clamping key fitting groove (7), and the cross sections of the limiting clamping key (8) and the clamping key fitting groove (7) are in right trapezoid shapes.
3. The multi-stage cylinder guide sleeve of claim 1, wherein: a small gap (16) is reserved between the pressure ring (13) and the first-stage cylinder barrel (1) as well as between the pressure cover (14); the pressing ring (13) is tightly attached to the end part of the inner side of the gland (14); the gland (14) compresses the press ring (13) to prevent the sealing element from moving.
4. A multi-stage cylinder guide bushing according to claim 3, wherein: the middle part of the outer side of the gland (14) is provided with a fastening bolt (15), the fastening bolt (15) penetrates through the gland (14), and after each stage of cylinder barrel is fixedly connected with each stage of gland through threads, the cylinder barrel is fixed by the fastening bolt, so that the gland is prevented from loosening.
5. The multi-stage cylinder guide sleeve of claim 1, wherein: the inner side of the fourth-stage cylinder barrel (4) is movably connected with a piston rod (5), the end part of the piston rod (5) is connected with a connecting column (18), and the middle part of the inner side of the connecting column (18) is provided with a fixing pin hole (19).
6. The improved method of a multi-stage cylinder according to any one of claims 1 to 5, wherein: the method specifically comprises the following steps:
s1, turning a groove;
s2, sealing the piston;
s3, installing a clamp key;
s4, limiting;
s5, sealing;
and S6, fixing and limiting.
7. The improved method of a multi-stage cylinder as set forth in claim 6, wherein: in the step S1, before the multistage cylinder is assembled, a key-engaging groove (7) having a right-angled trapezoidal shape is formed in each of the inner side portions of the respective stages of the cylinder tube by a turning machine;
in S2, sealing the side portions of the respective cylinder bores with the seal members during assembly;
in the S3, the piston rod is firstly installed into the fourth-stage cylinder barrel according to a certain sequence, then the limiting clamp key (8) is pushed into the clamp key fit groove (7) along the cavity on the inner side of the fourth-stage cylinder barrel, the end face of the limiting clamp key (8) is ensured to be tightly fit with the end face of the clamp key fit groove (7), and after the first-stage assembly is completed, the clamp keys (8) are sequentially installed into the cylinder barrels in each stage according to the sequence.
8. The improved method of a multi-stage cylinder as set forth in claim 7 wherein: in the step S4, after the limit clamp key (8) is accurately installed, the baffle ring (10) is pushed into the cavity, and the edge part of the baffle ring (10) is tightly fit with the edge end of the limit clamp key (8);
in the step S5, after the baffle ring (10) is installed, the fixed sealing seat (11) and the elastic sealing seat (12) are sequentially pushed into the cavity, and finally the pressing ring (13) is pushed into the end part of the cavity;
in S6, after the press ring (13) is installed, the press cover (14) is fixedly installed at the joint of each stage of cylinder barrel through threads, so that the sealing piece can be prevented from moving, and the tightening bolt is used for connecting the cylinder barrel and the press cover to play a role in preventing looseness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110240833.5A CN112855662A (en) | 2021-03-04 | 2021-03-04 | Method for improving multi-stage cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110240833.5A CN112855662A (en) | 2021-03-04 | 2021-03-04 | Method for improving multi-stage cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112855662A true CN112855662A (en) | 2021-05-28 |
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| CN202110240833.5A Pending CN112855662A (en) | 2021-03-04 | 2021-03-04 | Method for improving multi-stage cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113798844A (en) * | 2021-08-31 | 2021-12-17 | 郑煤机智鼎液压有限公司 | Assembling method of multi-stage oil cylinder |
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| CN113798844A (en) * | 2021-08-31 | 2021-12-17 | 郑煤机智鼎液压有限公司 | Assembling method of multi-stage oil cylinder |
| CN113798844B (en) * | 2021-08-31 | 2024-05-24 | 郑煤机智鼎液压有限公司 | Assembling method of multistage oil cylinder |
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