CN114263653A

CN114263653A - Multi-section air cylinder

Info

Publication number: CN114263653A
Application number: CN202111636178.1A
Authority: CN
Inventors: 陈钢; 朱亚光; 缪鹏; 白洋
Original assignee: Qingdao New Motivity Wood Working Machinery Co ltd
Current assignee: Qingdao New Motivity Wood Working Machinery Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-01
Anticipated expiration: 2041-12-27
Also published as: CN114263653B

Abstract

The utility model relates to a multistage cylinder, it includes the cylinder body, one-level cavity and second grade cavity have been seted up in the cylinder body, be provided with the one-level piston rod in the one-level cavity, the outstanding cylinder body tip of the tip of one-level piston rod, the one-level piston rod is internal-sliding to be equipped with the second grade piston rod, the one end of second grade piston rod is in the second grade cavity, the outstanding one end of the outstanding cylinder body of one-level piston rod of the second grade piston rod other end, one-level cavity and second grade cavity can fill high-pressure gas, drive one-level piston rod and second grade piston rod carry out reciprocating motion along self axial direction, this application has the shared space of reduction cylinder, guarantee that the cylinder can realize the effect of two promotion effects respectively.

Description

Multi-section air cylinder

Technical Field

The application relates to the field of cylinders, in particular to a multi-section cylinder.

Background

The cylinder is composed of a cylinder barrel, an end cover, a piston rod, a piston ring and the like. The end cover is provided with an air inlet port and an air outlet port, when the cylinder barrel is inflated through the air inlet port, the air outlet port discharges part of air, so that the pressure intensity at the air inlet port is greater than that at the air outlet port, and the piston rod extends outwards; when the cylinder is inflated through the exhaust port, the air inlet port discharges part of air, so that the pressure at the air inlet port is smaller than that at the exhaust port, and the piston rod retracts inwards.

When sanding treatment is carried out to the plank surface at present, the abrasive band of dull polish needs to be used, and the cylinder promotes the sand roller and makes the abrasive band butt to the plank, and the abrasive band inner wall can overlap one deck lining belt usually, and another cylinder promotes the commentaries on classics roller and makes the lining belt can extrude the abrasive band, makes the abrasive band butt always on the plank. The sand roller is started to rotate, so that the abrasive belt can polish the uneven surface of the wood board.

In view of the above-mentioned related art, the inventor believes that the two cylinders are too large in volume, occupy too much space, and affect the operation of a worker.

Disclosure of Invention

In order to reduce the shared space of cylinder, guarantee that the cylinder can realize two promotion effects respectively, this application provides a multistage cylinder.

The application provides a multistage cylinder adopts following technical scheme:

the utility model provides a multistage cylinder, includes the cylinder body, one-level cavity and second grade cavity have been seted up in the cylinder body, be provided with the one-level piston rod in the one-level cavity, the outstanding cylinder body tip of the tip of one-level piston rod, the one-level piston rod internal slip is equipped with the second grade piston rod, the one end of second grade piston rod is in the second grade cavity, the one end of the outstanding one-level piston rod of the second grade piston rod other end cylinder body, one-level cavity and second grade cavity can fill high-pressure gas, drive one-level piston rod and second grade piston rod carry out reciprocating motion along self axial direction.

Through adopting the above-mentioned technical scheme, during the user uses, after filling into high-pressure gas in the one-level cavity, the one-level piston rod can carry out the work of stretching out and drawing back in the one-level cavity, fill into high-pressure gas in the second grade cavity after, the second grade piston rod can stretch out and draw back the work along the axial direction of one-level piston rod in the one-level piston rod, the one end of second grade piston rod in the second grade cavity can carry out the work of stretching out and drawing back in the second grade cavity, one-level piston rod and second grade piston rod coaxial motion, can realize the effect of two cylinders in the shared space of a cylinder body, save the shared space of cylinder body, one-level piston rod and second grade piston rod can stretch out and draw back respectively or stretch out and draw back simultaneously, two operating condition can be realized to a cylinder body.

Optionally, a partition plate is arranged in the cylinder body, the primary cavity and the secondary cavity are respectively located on two sides of the partition plate, the secondary piston rod penetrates through the partition plate, a partition sleeve is fixedly connected to one side of the partition plate corresponding to the secondary cavity, the secondary piston rod is located in the partition sleeve, a leakage-proof ring is arranged at a position, close to the secondary piston rod, of the partition plate, and the leakage-proof ring is abutted to the secondary piston rod.

By adopting the technical scheme, when a user uses the piston rod, the primary cavity and the secondary cavity are clearly layered by the partition plate and the partition sleeve, and the primary piston rod is ensured not to enter the secondary cavity; meanwhile, two ends of the leakage-proof ring respectively support the second-stage piston rod and the partition plate tightly, so that gaps are not generated between the second-stage piston rod and the partition plate, and gas in the first-stage cavity is prevented from permeating into the second-stage cavity.

Optionally, the one-level piston rod and the second-level piston rod are both provided with piston rings used for enabling the piston rings to move, the piston rings comprise one-level sealing rings connected to the one-level piston rod, the inner walls of the one-level sealing rings are provided with first sealing rings, the first sealing rings and the one-level sealing rings can be abutted to the one-level piston rod, the outer walls of the one-level sealing rings are provided with first sealing thick rings, and the first sealing thick rings can be abutted to the inner wall of the cylinder body.

Through adopting above-mentioned technical scheme, when the user uses, the one-level sealing washer cover back on the one-level piston rod, first sealing ring on the one-level sealing washer supports tight one-level piston rod, thereby reduce the gap between one-level piston rod and the one-level sealing washer, guarantee the seal between one-level piston rod and the one-level sealing washer, first sealed thick ring on the one-level sealing washer simultaneously supports tight cylinder body inner wall, thereby reduce the gap between cylinder body inner wall and the one-level sealing washer, guarantee the seal between cylinder body inner wall and the one-level sealing washer, seal between one-level piston rod and the cylinder body inner wall can be guaranteed jointly to first sealing ring and first sealed thick ring, guarantee that high-pressure gas fills behind the one-level cavity, the one-level piston rod can normally move.

Optionally, the piston ring further comprises a second-stage sealing ring connected to the second-stage piston rod, a second sealing ring is arranged on the inner wall of the second-stage sealing ring, the second sealing ring and the second-stage sealing ring can abut against the second-stage piston rod, a second sealing thick ring is arranged on the outer wall of the second-stage sealing ring, and the second sealing thick ring can abut against the inner wall of the separation sleeve.

By adopting the technical scheme, when a user uses the piston rod, after the secondary sealing ring is sleeved on the secondary piston rod, the second sealing ring on the secondary sealing ring is tightly propped against the secondary piston rod, thereby reducing the gap between the secondary piston rod and the secondary sealing ring, ensuring the tightness between the secondary piston rod and the secondary sealing ring, simultaneously, the second sealing thick ring on the secondary sealing ring is tightly propped against the inner wall of the separation sleeve, thereby reducing the gap between the inner wall of the separating sleeve and the secondary sealing ring, ensuring the tightness between the secondary piston rod and the inner wall of the separating sleeve by the secondary sealing ring, the second sealing ring and the second sealing thick ring, ensuring the normal movement of the secondary piston rod after the high-pressure gas is filled into the secondary cavity, meanwhile, the secondary sealing ring can be abutted to the partition plate, so that the secondary piston rod is prevented from moving all the time, and the movement range of the secondary piston rod is ensured to be the axial length of the secondary cavity.

Optionally, the first-stage piston rod and the second-stage piston rod are respectively in threaded connection with a first locking nut and a second locking nut, the first locking nut is located on one side, close to the partition plate, of the first-stage sealing ring, the first locking nut can abut against the first-stage sealing ring, the second locking nut is located on one side, far away from the partition plate, of the second-stage sealing ring, and the second locking nut can abut against the second-stage sealing ring.

Through adopting above-mentioned technical scheme, when the user used, first lock nut and second lock nut can support tight one-level sealing washer and second grade sealing washer respectively, guarantee that the one-level sealing washer can not slide on the one-level piston rod, rock, guarantee the sealed effect of one-level sealing washer, guarantee that the second grade sealing washer can not slide on the second grade piston rod, rock, guarantee the sealed effect of second grade sealing washer.

Optionally, a sliding through hole is formed in the first-stage piston rod, the sliding through hole is arranged along the axial direction of the first-stage piston rod and penetrates through the first-stage piston rod, the second-stage piston rod is slidably arranged in the sliding through hole of the first-stage piston rod, a deflection copper sleeve is connected in the sliding through hole of the first-stage piston rod, and the second-stage piston rod is slidably connected in the deflection copper sleeve.

Through adopting above-mentioned technical scheme, when the user used, the second grade piston rod slided through the through-hole that slides of one-level piston rod to guarantee both coaxial movements, the condition that the skew can not appear when the through-hole that slides of one-level piston rod is guaranteed to the beat copper sheathing simultaneously to the second grade piston rod, stability when guaranteeing one-level piston rod and second grade piston rod to remove.

Optionally, a plurality of grooves of stirring have been seted up to first lock nut near one side of one-level sealing washer, one-level piston rod corresponds one-level sealing washer position department and is provided with a plurality of balls, the ball can slide and can butt in the one-level sealing washer along the radial direction of one-level piston rod, it has elastic dwang all to articulate to correspond every ball position department in the one-level piston rod, the ball is connected in the tip of dwang, the equal fixedly connected with of ball one end is kept away from to every dwang dials the piece, dial the piece and can stretch out the one-level piston rod, and can stretch into first lock nut stir the inslot.

By adopting the technical scheme, when a user uses the automatic transmission device, the first-stage sealing ring is arranged behind the first-stage piston rod, the first-stage sealing ring is abutted against the ball and moves continuously along the ball, the ball is pushed into the first-stage piston rod by the first-stage sealing ring, the rotating rod starts to rotate at the same time, the poking block at the other end of the automatic transmission device extends out of the first-stage piston rod, then the first locking nut is screwed, the first locking nut is abutted against the poking block, the poking block can move into the poking groove of the first locking nut, along with the rotation of the first locking nut, the poking block moves out of the poking groove and is pushed into the first-stage piston rod by the first locking nut, when other poking grooves on the first locking nut rotate to the position of the poking block, the poking block can move into the poking groove again, after the first locking nut and the first-stage sealing ring are mutually locked, the poking block is positioned in the poking groove of the first locking nut, so as to ensure that the first locking nut can not rotate, guarantee that first lock nut and one-level sealing washer can not appear not hard up the condition, guarantee first lock nut's locking effect.

Optionally, the poking block is far away from the rotating rod and is provided with a poking inclined surface, and the poking inclined surface is arranged along the axial direction of the first-stage piston rod.

Through adopting above-mentioned technical scheme, when the user uses, behind the first lock nut butt stirring piece, along with first lock nut's continuation rotation, stirring the piece and can moving into first lock nut stir the inslot, continue to twist first lock nut, first lock nut's edge butt stir the inclined plane and continue to rotate along stirring the inclined plane of stirring the piece to stirring the piece, the dwang produces deformation to the direction of keeping away from first lock nut, guarantee that stirring the piece can shift out stir the groove and move to the one-level piston rod in, other stir the groove on the first lock nut when rotating stirring piece position department, stir the piece and can get into once more stir the inslot, stir the piece and only one side and stir the inclined plane, further prevent that first lock nut from reversing, avoid appearing the condition in gap between first lock nut and the one-level sealing washer.

Optionally, the first locking nut corresponds every and stirs equal sliding connection in trench position department and has the catch bar, and every catch bar lateral wall all is provided with a plurality of joint pieces, and the joint groove has all been seted up to first locking nut corresponding every joint piece position department, and the catch bar can butt in stirring the piece when joint piece joint is in the joint groove.

Through adopting above-mentioned technical scheme, when the user uses, when needing to change the one-level sealing washer, promote the catch bar and be close to the one-level piston rod, the joint piece moves to the joint inslot along with the catch bar, guarantee that the catch bar can not be by dwang and stir the piece and move back the normal position, the catch bar after the removal stretches out the promotion through-hole and moves to stirring the inslot simultaneously, and the catch bar is close to the one end of one-level piston rod and is parallel with first lock nut's inner peripheral surface, the catch bar promotes to stir the piece and shifts out and stir the groove, guarantee that first lock nut can normally rotate, guarantee that the user can normally screw off first lock nut and change the one-level sealing washer.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the design of the cylinder body, the primary cavity, the secondary cavity, the primary piston rod and the secondary piston rod saves the space occupied by the cylinder body of the air cylinder, the primary piston rod and the secondary piston rod can respectively extend or simultaneously extend, and one cylinder body can realize two working states;

2. the primary sealing ring, the first sealing ring and the first sealing thick ring can jointly ensure the tightness between the primary piston rod and the inner wall of the cylinder body;

3. first lock nut and second lock nut guarantee that the one-level sealing washer can not slide on the one-level piston rod, rock, guarantee the sealed effect of one-level sealing washer, guarantee that the second grade sealing washer can not slide on the second grade piston rod, rock, guarantee the sealed effect of second grade sealing washer.

Drawings

FIG. 1 is a schematic overall structure diagram of a first embodiment of the present application;

FIG. 2 is a cross-sectional view of the overall structure of the first embodiment of the present application;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is an enlarged view of portion C of FIG. 2;

FIG. 6 is an enlarged view of portion D of FIG. 2;

FIG. 7 is an enlarged view of section E of FIG. 2;

FIG. 8 is a schematic overall structure diagram of a second embodiment of the present application;

FIG. 9 is a sectional view showing the entire structure of the second embodiment of the present application;

fig. 10 is an enlarged view of portion F of fig. 9;

FIG. 11 is a sectional view of a first lock nut according to a second embodiment of the present application;

fig. 12 is an enlarged view of a portion G in fig. 11.

Description of reference numerals: 1. a cylinder body; 11. a moving groove; 12. an outlet hole; 13. a limiting ring; 131. a closed ring; 132. a closed groove; 14. a bottom cover; 141. a bottom ring; 142. a base plate; 2. a sealing cover; 21. a sealing plate; 22. sealing sleeves; 23. sealing the copper sleeve; 3. a partition plate; 31. a primary cavity; 32. a secondary cavity; 33. a separation hole; 34. a separation sleeve; 35. separating the ring grooves; 36. separating the circular rings; 37. a placement groove; 38. a leakage-proof ring; 381. a deformation groove; 4. a primary piston rod; 41. a first ring groove; 42. a slip through hole; 421. a deflection copper sleeve; 43. a rotating groove; 431. abutting the interface; 432. a stretching opening; 44. rotating the rod; 45. a ball bearing; 46. a shifting block; 461. poking the inclined plane; 5. a secondary piston rod; 51. a second ring groove; 6. a piston ring; 61. a primary seal ring; 62. a first inner annular groove; 621. a first seal ring; 63. a first outer ring groove; 631. a first thick sealing ring; 6311. a first buffer groove; 6312. a second buffer groove; 64. a first lock nut; 641. a poking groove; 642. pushing the through hole; 643. a push rod; 644. a clamping block; 645. a clamping groove; 65. a secondary seal ring; 66. a second inner annular groove; 661. a second seal ring; 67. a second outer ring groove; 671. a second thick sealing ring; 6711. a third buffer tank; 6712. a fourth buffer groove; 68. a second lock nut; 7. an air intake device; 71. a first air intake hole; 711. an air inlet vertical hole; 72. a first air intake bolt; 73. a second air intake hole; 74. a second air intake bolt; 8. an inflator; 81. a first inflation port; 811. a first gas-filled tube; 82. a second inflation port; 821. a second gas-filled tube.

Detailed Description

The present application is described in further detail below with reference to figures 1-12.

The embodiment of the application discloses multistage cylinder.

Example 1: referring to fig. 1 and 2, a multistage cylinder includes a cylinder body 1, and a moving groove 11 has been seted up to cylinder body 1, and moving groove 11 is cylindrical groove and sets up along the axial direction of cylinder body 1, and cylinder body 1 top is provided with sealed lid 2, and cylinder body 1 bottom is provided with bottom 14. A partition plate 3 is arranged in a moving groove 11 of the cylinder body 1, the partition plate 3 is fixedly connected to the middle position of the cylinder body 1, and the partition plate 3 covers the cross section of the cylinder body 1. The movable groove 11 is divided into a first-stage cavity 31 and a second-stage cavity 32 by the partition plate 3, a first-stage piston rod 4 is arranged in the first-stage cavity 31 of the cylinder body 1, the first-stage piston rod 4 protrudes out of the sealing cover 2, a second-stage piston rod 5 is arranged in the first-stage piston rod 4, the second-stage piston rod 5 is located in the second-stage cavity 32, the second-stage piston rod 5 protrudes out of the first-stage piston rod 4, and two ends of the second-stage piston rod 5 can extend out of the cylinder body 1. Piston rings 6 are arranged at the bottoms of the primary piston rod 4 and the secondary piston rod 5, and the two piston rings 6 are respectively positioned in the primary cavity 31 and the secondary cavity 32. The cylinder body 1 is provided with an air inlet device 7 and an air charging device 8 at the positions corresponding to the primary cavity 31 and the secondary cavity 32 respectively.

Referring to fig. 1 and 2, the sealing cover 2 includes a sealing plate 21 and a sealing sleeve 22, the sealing sleeve 22 is clamped in the moving groove 11 of the cylinder body 1, the sealing sleeve 22 is arranged along the axial direction of the cylinder body 1, and the first-stage piston rod 4 is slidably arranged in the sealing sleeve 22. The sealing plate 21 is fixedly connected to the side of the sealing sleeve 22 away from the partition plate 3, the cross-sectional area of the sealing plate 21 is larger than that of the cylinder 1, and the sealing plate 21 can be abutted against the cylinder 1. When the user uses, seal cover 22 joint in cylinder body 1, the user of being convenient for changes seal cover 22 and closing plate 21. The sealing sleeve 22 is internally and fixedly connected with a sealing copper sleeve 23, and the primary piston rod 4 is abutted against the sealing copper sleeve 23 when the sealing sleeve 22 is sleeved on the cylinder body 1. When the user uses, sealed copper sheathing 23 seals seal cover 22 and one-level piston rod 4, guarantees the leakproofness of one-level cavity 31.

Referring to fig. 1 and 2, the bottom cover 14 includes a bottom ring 141 and a bottom plate 142, the bottom ring 141 is clamped in the moving groove 11 of the cylinder 1, and the bottom ring 141 is disposed along the axial direction of the cylinder 1. The bottom plate 142 is fixedly connected to the bottom ring 141 on the side away from the partition plate 3, and the bottom plate 142 can be brought into contact with the cylinder 1. When the user uses, end ring 141 joint in cylinder body 1, the user of being convenient for changes end ring 141 and bottom plate 142.

Referring to fig. 2 and 3, a first ring groove 41 is formed in the outer wall of the primary piston rod 4 at a position close to the partition plate 3. The piston ring 6 comprises a primary sealing ring 61 slidably connected to the primary piston rod 4, the primary sealing ring 61 being located at the first ring groove 41 of the primary piston rod 4. The inner wall of the primary sealing ring 61 is provided with a first inner ring groove 62. The first sealing ring 621 is disposed in the first inner annular groove 62 of the first-stage sealing ring 61, and both the first sealing ring 621 and the first-stage sealing ring 61 can abut against the first-stage piston rod 4. The outer wall of the primary sealing ring 61 is provided with a first outer annular groove 63, and the first inner annular groove 62 and the first outer annular groove 63 are located on the same horizontal plane. A first thick seal ring 631 is disposed in the first outer ring groove 63 of the primary seal ring 61, and the first thick seal ring 631 can abut against the inner wall of the cylinder block 1. The first-stage piston rod 4 is close to the partition plate 3 and is in threaded connection with a first locking nut 64, the first locking nut 64 can move along the axial direction of the first-stage piston rod 4 and can abut against the first-stage sealing ring 61, and the first locking nut 64 is located on one side, close to the partition plate 3, of the first-stage sealing ring 61.

When the user uses the piston rod, the first-stage sealing ring 61 is sleeved on the first-stage piston rod 4 and is moved to the first annular groove 41, then the first locking nut 64 is sleeved on the first-stage piston rod 4 and is screwed until the first locking nut 64 abuts against the first-stage sealing ring 61, and the first-stage sealing ring 61 is prevented from sliding down from the first-stage piston rod 4; the first sealing ring 621 can abut against the primary piston rod 4, so that gas is prevented from flowing from a gap between the primary piston rod 4 and the primary sealing ring 61, and the tightness between the primary piston rod 4 and the primary sealing ring 61 is ensured. First sealed thick ring 631 can support the inner wall of tight cylinder body 1 to prevent that gas from flowing in the gap between cylinder body 1 and the one-level sealing washer 61, guarantee the leakproofness between cylinder body 1 and the one-level sealing washer 61, guarantee to admit air and give vent to anger the process and can normally go on.

Referring to fig. 2 and 3, a deflection copper sleeve 421 is fixedly connected in the sliding through hole 42 of the primary piston rod 4, the deflection copper sleeve 421 is located at the first annular groove 41 of the primary piston rod 4, and the secondary piston rod 5 is slidably connected in the deflection copper sleeve 421. When the user uses, beat copper sheathing 421 prevents that secondary piston rod 5 from taking place the beat in the slip through-hole 42 of primary piston rod 4, the stability when guaranteeing the removal of secondary piston rod 5.

Referring to fig. 2 and 3, a first annular buffer groove 6311 is formed in a side of the first thick sealing ring 631 close to the first lock nut 64, a second annular buffer groove 6312 is formed in a side of the first thick sealing ring 631 away from the first lock nut 64, and the second buffer groove 6312 is located in a side of the first buffer groove 6311 away from the first sealing ring 621. When the user uses, when the first-stage sealing ring 61 moves, the first sealing thick ring 631 can be extended or contracted through the first buffer groove 6311 and the second buffer groove 6312 to prevent the first sealing thick ring 631 from moving out of the first-stage sealing ring 61 in the moving process of the first-stage sealing ring 61.

Referring to fig. 2 and 4, the air inlet device 7 includes a first air inlet hole 71 opened at the top of the sealing plate 21, and the first air inlet hole 71 is disposed along the length direction of the sealing plate 21. The position of the sealing sleeve 22 corresponding to the first air inlet hole 71 is provided with an air inlet vertical hole 711, the air inlet vertical hole 711 is arranged along the axial direction of the cylinder body 1, the air inlet vertical hole 711 is communicated with the first air inlet hole 71, and the air inlet vertical hole 711 is communicated with the primary cavity 31. The outer wall of the sealing cover 2 is connected with a first air inlet bolt 72 corresponding to the inner thread of the first air inlet hole 71, the first air inlet bolt 72 is positioned at the position of the first air inlet hole 71 far away from the air inlet vertical hole 711, and the first air inlet bolt 72 can seal the first air inlet hole 71. The inflation device 8 comprises a first inflation hole 81 arranged on the cylinder body 1, the first inflation hole 81 is positioned at the position of the primary cavity 31 close to the partition plate 3, and the first inflation hole 81 is communicated with the primary cavity 31. A first inflation tube 811 is fixedly connected to the interior of the first inflation hole 81 of the cylinder body 1.

When the user uses, unscrew first air inlet bolt 72, through first inlet hole 71 and the perpendicular hole 711 of admitting air to aerifing in the cavity that the division board 3 was kept away from to one-level cavity 31, when atmospheric pressure in the cavity that one-level cavity 31 was close to division board 3 was less than the atmospheric pressure in the cavity that one-level cavity 31 was kept away from division board 3, one-level sealing washer 61 drove one-level piston rod 4 and moved to being close to division board 3 direction. The first inflation tube 811 and the first inflation hole 81 are used for inflating the cavity of the first-stage cavity 31 close to the partition plate 3, and when the air pressure of the cavity of the first-stage cavity 31 close to the partition plate 3 is greater than the air pressure of the cavity of the first-stage cavity 31 far away from the partition plate 3, the first-stage sealing ring 61 drives the first-stage piston rod 4 to move towards the direction far away from the partition plate 3.

Referring to fig. 2, the first-stage piston rod 4 is provided with a sliding through hole 42, the sliding through hole 42 is arranged along the axial direction of the first-stage piston rod 4, and the sliding through hole 42 penetrates through the first-stage piston rod 4. The partition plate 3 is provided with a partition hole 33 corresponding to the center thereof, and the partition hole 33 is arranged along the axial direction of the partition plate 3. The second-stage piston rod 5 is connected in the separation hole 33 of the separation plate 3 in a sliding mode, the second-stage piston rod 5 is arranged in the sliding through hole 42 of the first-stage piston rod 4 in a sliding mode, the length of the second-stage piston rod 5 is larger than that of the first-stage piston rod 4, and the two ends of the second-stage piston rod 5 can extend out of the first-stage piston rod 4. One side of the partition plate 3 corresponding to the secondary cavity 32 is fixedly connected with a partition sleeve 34, the bottom of the partition sleeve 34 is clamped on the inner wall of the cylinder body 1, and the secondary piston rod 5 is positioned in the partition sleeve 34.

Referring to fig. 2 and 5, the bottom plate 142 is provided with an extending hole 12 corresponding to a center position thereof, the extending hole 12 is disposed along an axial direction of the secondary piston rod 5, and the secondary piston rod 5 can extend out of the extending hole 12. The bottom plate 142 is fixedly connected with a limit ring 13 in the corresponding extending hole 12, and the inner wall of the limit ring 13 can abut against the secondary piston rod 5. Bottom plate 142 corresponds fixedly connected with and has elastic closed ring 131 in stretching out hole 12, closed ring 131 fixed connection in spacing ring 13, and closed ring 131 is located spacing ring 13 and is close to 3 one sides of division board, and closed ring 131 can the butt in second grade piston rod 5, and curved closed groove 132 has been seted up to closed ring 131 near one-level piston rod 4 one side, and the arc mouth of closed groove 132 sets up towards one-level piston rod 4.

When the secondary piston rod 5 moves in the sliding through hole 42 of the primary piston rod 4, one end of the secondary piston rod 5, which is far away from the sealing cover 2, can extend out of the extending hole 12 of the cylinder body 1, the sealing ring 131 prevents a gap from occurring between the secondary piston rod 5 and the cylinder body 1, when the secondary piston rod 5 moves towards the direction close to the sealing cover 2, the sealing ring 131 deforms through the sealing groove 132, the position, which is close to the secondary piston rod 5, of the sealing ring 131 can slightly approach the position, which is far away from the secondary piston rod 5, of the sealing ring 131, when the secondary piston rod 5 moves towards the direction far away from the sealing cover 2, the position, which is close to the secondary piston rod 5, of the sealing ring 131 can slightly move away from the position, which is far away from the secondary piston rod 5, of the sealing ring 131 tightly abuts against the secondary piston rod 5, and acting force which approaches to the secondary piston rod 5 can be generated when the secondary piston rod 5 moves up and down, further ensuring the tightness between the secondary piston rod 5 and the cylinder body 1.

Referring to fig. 2 and 6, the secondary piston rod 5 is provided with a second ring groove 51 near the partition plate 3. The piston ring 6 further comprises a secondary sealing ring 65 slidably connected to the secondary piston rod 5, the secondary sealing ring 65 being located at the second ring groove 51 of the secondary piston rod 5. The inner wall of the secondary sealing ring 65 is provided with a second inner ring groove 66. A second seal ring 661 is disposed in the second inner annular groove 66 of the secondary seal ring 65, and both the second seal ring 661 and the secondary seal ring 65 can abut against the secondary piston rod 5. The outer wall of the secondary sealing ring 65 is provided with a second outer ring groove 67, and the second inner ring groove 66 and the second outer ring groove 67 are in the same horizontal plane. A second thick sealing ring 671 is disposed in the second outer annular groove 67 of the secondary sealing ring 65, and the second thick sealing ring 671 can abut against the inner wall of the spacer 34. The second-stage piston rod 5 is in threaded connection with a second locking nut 68, the second locking nut 68 can move along the axial direction of the second-stage piston rod 5 and can abut against the second-stage sealing ring 65, and the second locking nut 68 is located on one side, far away from the partition plate 3, of the second-stage sealing ring 65.

When the secondary piston rod is used by a user, the secondary sealing ring 65 is sleeved on the secondary piston rod 5 and moved to the second annular groove 51, then the second locking nut 68 is sleeved on the secondary piston rod 5 and screwed until the second locking nut 68 abuts against the secondary sealing ring 65, and the secondary sealing ring 65 is prevented from sliding down from the secondary piston rod 5; the second sealing ring 661 can tightly support the secondary piston rod 5, thereby preventing gas from flowing from the gap between the secondary piston rod 5 and the secondary sealing ring 65, and ensuring the tightness between the secondary piston rod 5 and the secondary sealing ring 65. The second thick sealing ring 671 can abut against the inner wall of the cylinder body 1, so that gas is prevented from flowing from a gap between the cylinder body 1 and the secondary sealing ring 65, the airtightness between the cylinder body 1 and the secondary sealing ring 65 is ensured, and the gas inlet and outlet processes can be normally carried out. The secondary sealing ring 65 can drive the secondary piston rod 5 to move in the sliding through hole 42 of the primary piston rod 4 when moving.

Referring to fig. 2 and 7, a separating ring groove 35 is formed at the position of the separating hole 33 of the separating plate 3, the separating ring groove 35 is located on one side of the separating plate 3 close to the primary piston rod 4, and the separating ring groove 35 is communicated with the separating hole 33. The partition plate 3 is fixedly connected with a partition ring 36 at the position corresponding to the partition ring groove 35, the diameter length of the partition ring 36 is smaller than that of the partition hole 33, and a placing groove 37 is formed by the partition plate 3 and the partition ring 36. The leakage-proof ring 38 is placed in the placing groove 37 of the partition plate 3, the leakage-proof ring 38 abuts against the second-stage piston rod 5, the leakage-proof ring 38 is close to one side of the first-stage piston rod 4 and is provided with an arc-shaped deformation groove 381, and an arc opening of the deformation groove 381 faces the first-stage piston rod 4. When the user uses the anti-leakage ring 38, the gap between the secondary piston rod 5 and the partition plate 3 is reduced, and air in the primary cavity 31 and the secondary cavity 32 is prevented from communicating with each other. The deformation groove 381 on the leakage preventing ring 38 can be deformed to be extended or contracted to prevent the leakage preventing ring 38 from moving out of the partition plate 3 during the movement of the secondary piston rod 5.

Referring to fig. 2 and 6, an annular buffer groove third 6711 is formed in a side of the second thick sealing ring 671 close to the second lock nut 68, an annular buffer groove fourth 6712 is formed in a side of the second thick sealing ring 671 far away from the second lock nut 68, and the buffer groove fourth 6712 is located in a side of the buffer groove third 6711 far away from the second sealing ring 661. When the user uses, the second thick sealing ring 671 can be extended or contracted through the third buffer groove 6711 and the fourth buffer groove 6712 when the second sealing ring 65 moves, and the second thick sealing ring 671 is prevented from moving out of the second sealing ring 65 in the process that the second sealing ring 65 moves.

Referring to fig. 2, the air intake device 7 further includes a second air intake hole 73 opened in the cylinder 1, the second air intake hole 73 is disposed along a radial direction of the partition plate 3, the second air intake hole 73 is located at a position below the first air intake hole 71 and is parallel to the first air intake hole 71, the second air intake hole 73 is disposed through the cylinder 1 and the partition sleeve 34, and the second air intake hole 73 is communicated with the secondary cavity 32. A second air inlet bolt 74 is connected to the outer wall of the cylinder 1 corresponding to the second air inlet hole 73 through internal threads, and the second air inlet bolt 74 can seal the second air inlet hole 73. The inflator 8 further includes a second inflation hole 82 provided in the bottom plate 142, the second inflation hole 82 is located at a position below the first inflation hole 81 and in parallel with the first inflation hole 81, the second inflation hole 82 is located at a position away from the partition plate 3 in the secondary cavity 32, and the second inflation hole 82 communicates with the secondary cavity 32. A second inflation tube 821 is fixedly connected to the inside of the second inflation hole 82 of the base plate 142.

When the user uses, unscrew second air inlet bolt 74, through second inlet port 73 aerify to the cavity that second grade cavity 32 is close to division board 3, when atmospheric pressure in the cavity that second grade cavity 32 is close to division board 3 is greater than the atmospheric pressure in the cavity that second grade cavity 32 is far away from division board 3, second grade sealing washer 65 is to keeping away from division board 3 direction removal, and second grade sealing washer 65 drives second grade piston rod 5 and removes in the through-hole 42 that slides of first grade piston rod 4. The cavity of the secondary cavity 32 far from the partition plate 3 is inflated through the second inflation tube 821 and the second inflation hole 82, when the air pressure in the cavity of the secondary cavity 32 close to the partition plate 3 is smaller than the air pressure in the cavity of the secondary cavity 32 far from the partition plate 3, the secondary sealing ring 65 moves towards the direction close to the partition plate 3, and the secondary sealing ring 65 drives the secondary piston rod 5 to move in the sliding through hole 42 of the primary piston rod 4.

The implementation principle of the embodiment 1 is as follows: when the user uses, overlaps one-level sealing washer 61 in the first annular 41 department of one-level piston rod 4, then screws up first lock nut 64 until supporting tightly one-level sealing washer 61, and first sealing ring 621 on the one-level sealing washer 61 can support tightly one-level piston rod 4, guarantees the leakproofness between one-level piston rod 4 and the one-level sealing washer 61. The first thick sealing ring 631 on the first-stage sealing ring 61 can abut against the inner wall of the cylinder body 1, and the sealing performance between the cylinder body 1 and the first-stage sealing ring 61 is ensured. The secondary sealing ring 65 is sleeved at the second annular groove 51 of the secondary piston rod 5, then the second locking nut 68 is screwed until the secondary sealing ring 65 is tightly abutted, and the second sealing ring 661 on the secondary sealing ring 65 can tightly abut against the secondary piston rod 5, so that the sealing performance between the secondary piston rod 5 and the secondary sealing ring 65 is ensured. The second thick sealing ring 671 on the second-stage sealing ring 65 can tightly abut against the inner wall of the cylinder body 1, so that the sealing performance between the cylinder body 1 and the second-stage sealing ring 65 is ensured. When the primary piston rod 4 needs to be used, the first air inlet bolt 72 is screwed off, the first air inlet hole 71 and the air inlet vertical hole 711 are inflated, air enters the cavity of the primary cavity 31 far away from the partition plate 3, and after the air amount in the cavity of the primary cavity 31 far away from the partition plate 3 is increased, the primary sealing ring 61 drives the primary piston rod 4 to approach the partition plate 3, so that the primary piston rod 4 retracts into the cylinder body 1. The first inflation pipe 811 inflates the first inflation hole 81, and after the air volume in the chamber of the first-stage cavity 31 close to the partition plate 3 is increased, the first-stage sealing ring 61 drives the first-stage piston rod 4 to move towards the direction far away from the partition plate 3, so that the first-stage piston rod 4 extends out of the cylinder body 1. When the secondary piston rod 5 needs to be used, the second air inlet bolt 74 is screwed off, air is inflated to the second air inlet 73, air enters the cavity of the secondary cavity 32 close to the partition plate 3, after the air amount in the cavity of the secondary cavity 32 close to the partition plate 3 is increased, the secondary sealing ring 65 moves towards the direction far away from the partition plate 3, the secondary sealing ring 65 drives the secondary piston rod 5 to move, and the secondary piston rod 5 moves in the sliding through hole 42 of the primary piston rod 4, so that the secondary piston rod 5 retracts into the cylinder body 1. Aerify to second inflation hole 82 through second inflation tube 821, the air volume in the cavity that division board 3 was kept away from to second grade cavity 32 increases the back, and second grade sealing washer 65 is close to division board 3, and second grade sealing washer 65 drives second grade piston rod 5 and removes to make second grade piston rod 5 stretch out cylinder body 1, guarantee that one-level piston rod 4 and second grade piston rod 5 can carry out concertina movement respectively, and the shared space of two piston rods can be saved in the outside of second grade piston rod 5 to the cover of one-level piston rod 4.

Example 2: referring to fig. 8 and 9, the present embodiment is different from embodiment 1 in that a rotation groove 43 (see fig. 10) is symmetrically formed at a position of the primary piston rod 4 corresponding to the first ring groove 41, and the rotation groove 43 is disposed along the axial direction of the primary piston rod 4. The position of the first-stage piston rod 4 corresponding to the rotating groove 43 is respectively provided with a butt joint opening 431 and an extending opening 432, the butt joint opening 431 and the extending opening 432 are both communicated with the rotating groove 43, the butt joint opening 431 is located at one end, far away from the first locking nut 64, of the rotating groove 43, and the extending opening 432 is located at one end, close to the first locking nut 64, of the rotating groove 43. The one-level piston rod 4 corresponds and all articulates in every rotation groove 43 has elastic dwang 44, and dwang 44 corresponds self intermediate position department and articulates in one-level piston rod 4, the axial perpendicular to one-level piston rod 4's of articulated shaft axial, and dwang 44 sets up along the axial direction of one-level piston rod 4. The rotating rod 44 is fixedly connected with a ball 45 at a position corresponding to the abutting port 431, the ball 45 can slide along the radial direction of the primary piston rod 4, and the ball 45 can extend out of the abutting port 431 and abut against the primary sealing ring 61.

Referring to fig. 11 and 12, a plurality of toggle grooves 641 are formed on a side of the first locking nut 64 close to the primary sealing ring 61, the toggle grooves 641 are arranged in a circumferential array along the first locking nut 64, and the toggle grooves 641 are located at a position where the first locking nut 64 is close to the primary piston rod 4. Each rotating rod 44 is fixedly connected with a toggle block 46 at a position corresponding to the extending opening 432, and the toggle block 46 can extend from the extending opening 432 and can extend into the toggle groove 641 of the first lock nut 64. The toggle block 46 is far away from the rotating rod 44 and is provided with a toggle inclined plane 461, the first lock nut 64 can abut against the toggle inclined plane 461 and rotate, the toggle block 46 can enter the rotating groove 43, and the first lock nut 64 cannot rotate when not abutting against the toggle inclined plane 461.

When a user uses the device, after the primary sealing ring 61 slides to the first annular groove 41 of the primary piston rod 4, the primary sealing ring 61 abuts against the ball 45 and pushes the ball 45 into the rotating groove 43, and at the same time, the rotating rod 44 rotates, so that the toggle block 46 at the other end of the rotating rod 44 extends out from the extending port 432, the first lock nut 64 is sleeved on the primary piston rod 4 and then rotates the first lock nut 64, after the first lock nut 64 abuts against the toggle block 46, the first lock nut 64 continues to rotate, the toggle block 46 can move into the toggle groove 641 of the first lock nut 64, the first lock nut 64 continues to rotate, the first lock nut 64 can abut against the toggle inclined plane 461 of the toggle block 46 and rotate along the toggle block 46, so that the toggle block 46 leaves the toggle groove 641 and then enters the rotating groove 43 through the extending port 432, when other toggle grooves 641 on the first lock nut 64 rotate to the rotating groove 43, the poking block 46 can extend out of the rotating groove 43 again and enter the poking groove 641, when the first locking nut 64 abuts against the first-stage sealing ring 61, the poking block 46 is located in the poking groove 641 of the first locking nut 64, only one side of the poking block 46 is provided with a poking inclined surface 461, the first locking nut 64 is prevented from reversing, a gap is prevented from occurring between the first locking nut 64 and the first-stage sealing ring 61, and the locking effect of the first locking nut 64 is ensured.

Referring to fig. 10 and 12, a pushing through hole 642 is formed in a position of the sidewall of the first lock nut 64 corresponding to each toggle groove 641, the pushing through hole 642 is disposed along a radial direction of the first lock nut 64, and the pushing through hole 642 is communicated with the toggle groove 641 and penetrates through the first lock nut 64. A push rod 643 is slidably connected to each of the push through holes 642 of the first lock nut 64, the push rod 643 slides along the radial direction of the first lock nut 64, and the section of the push rod 643 in the radial direction is arranged to cover the push through holes 642. Two clamping blocks 644 are symmetrically and fixedly connected to the side wall of each push rod 643. Clamping grooves 645 are formed in the positions, corresponding to the clamping blocks 644, of the pushing through holes 642 of the first locking nut 64, and the clamping blocks 644 can be clamped in the clamping grooves 645. After the clamping block 644 is clamped into the clamping groove 645, the push rod 643 can abut against the toggle block 46, and the push rod 643 is flush with the inner circumferential surface of the first lock nut 64.

When a user uses the device, when the first-stage sealing ring 61 needs to be replaced, the push rod 643 is pushed, the push rod 643 moves towards the first-stage piston rod 4, the push rod 643 drives the clamping block 644 to move into the clamping groove 645, the poking block 46 is prevented from moving the push rod 643 back to the original position, meanwhile, the push rod 643 can extend out of the push through hole 642 and move into the poking groove 641, the push rod 643 pushes the poking block 46 to move out of the poking groove 641, it is guaranteed that the first locking nut 64 can normally rotate, and after the first locking nut 64 is screwed off from the first-stage piston rod 4, the first-stage sealing ring 61 can be taken off from the first-stage piston rod 4.

The implementation principle of the embodiment 2 is as follows: when the user uses, the in-process that promotes one-level sealing washer 61 and remove to first annular 41 position department of one-level piston rod 4 pushes away in the rotating groove 43 with stirring piece 46 earlier, then continues to promote one-level sealing washer 61 until its butt in ball 45, and one-level sealing washer 61 pushes ball 45 into rotating groove 43, and dwang 44 rotates around the articulated shaft simultaneously, and stirring piece 46 at the dwang 44 other end can stretch out and stretch out mouth 432. When rotating first lock nut 64, first lock nut 64 is close to one-level sealing washer 61 gradually, and when first lock nut 64 rotated the position department of dialling piece 46, dialling in the piece 46 can get into the groove 641 of dialling first lock nut 64 in proper order, along with the rotation of first lock nut 64, the groove 641 department of dialling of first lock nut 64 can butt and dial the stirring inclined plane 461 of piece 46 and paste the stirring inclined plane 461 that dials piece 46 and rotate, dial piece 46 keeps away from stirring groove 641 gradually under the effect of stirring inclined plane 461, and move into through stretching mouthful 432 and rotate in the groove 43. When the other toggle grooves 641 on the first lock nut 64 rotate to the position of the toggle block 46, the toggle block 46 extends out of the rotating groove 43 again and enters the toggle groove 641, and along with the rotation of the first lock nut 64, the toggle block 46 moves out of the toggle groove 641 again until the first lock nut 64 abuts against the first-stage sealing ring 61; after the first lock nut 64 and the first-stage sealing ring 61 are abutted against each other, the toggle block 46 moves into the toggle groove 641 of the first lock nut 64, and the toggle inclined surface 461 of the toggle block 46 ensures that the first lock nut 64 can only rotate along one direction, so that the first lock nut 64 cannot be reversed, and the locking effect of the first lock nut 64 is ensured.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A multistage cylinder, includes cylinder body (1), its characterized in that: a first-stage cavity (31) and a second-stage cavity (32) are formed in a cylinder body (1), a first-stage piston rod (4) is arranged in the first-stage cavity (31), the end of the first-stage piston rod (4) protrudes out of the end of the cylinder body (1), a second-stage piston rod (5) is arranged in the first-stage piston rod (4) in a sliding mode, one end of the second-stage piston rod (5) is located in the second-stage cavity (32), the other end of the second-stage piston rod (5) protrudes out of one end of the first-stage piston rod (4) and protrudes out of the cylinder body (1), high-pressure gas can be filled into the first-stage cavity (31) and the second-stage cavity (32), and the first-stage piston rod (4) and the second-stage piston rod (5) are driven to reciprocate along the axial direction of the first-stage piston rod and the second-stage piston rod (5).

2. A multi-segment cylinder as claimed in claim 1, wherein: be provided with division board (3) in cylinder body (1), one-level cavity (31) and second grade cavity (32) are located division board (3) both sides respectively, and division board (3) setting is run through in second grade piston rod (5), and division board (3) correspond second grade cavity (32) one side fixedly connected with spacer bush (34), and second grade piston rod (5) are located spacer bush (34), and division board (3) are close to second grade piston rod (5) position department and are provided with leak protection ring (38), leak protection ring (38) butt in second grade piston rod (5).

3. A multi-segment cylinder as claimed in claim 1, wherein: one-level piston rod (4) and second grade piston rod (5) all are provided with piston ring (6) that are used for making self to remove, piston ring (6) are including connecting one-level sealing washer (61) on one-level piston rod (4), one-level sealing washer (61) inner wall is provided with first sealing ring (621), first sealing ring (621) and one-level sealing washer (61) homoenergetic butt in one-level piston rod (4), one-level sealing washer (61) outer wall is provided with first sealed thick ring (631), first sealed thick ring (631) can butt in cylinder body (1) inner wall.

4. A multi-segment cylinder as claimed in claim 2, wherein: piston ring (6) still including connecting second grade sealing washer (65) on second grade piston rod (5), second grade sealing washer (65) inner wall is provided with second sealing ring (661), and second sealing ring (661) and second grade sealing washer (65) all can butt in second grade piston rod (5), and second grade sealing washer (65) outer wall is provided with the sealed thick ring of second (671), and the sealed thick ring of second (671) can butt in divider sleeve (34) inner wall.

5. A multi-segment cylinder according to claim 3 or 4, characterized in that: one-level piston rod (4) and second grade piston rod (5) threaded connection have first lock nut (64) and second lock nut (68) respectively, and first lock nut (64) are located one-level sealing washer (61) and are close to division board (3) one side, and first lock nut (64) can butt in one-level sealing washer (61), and second lock nut (68) are located second grade sealing washer (65) and keep away from division board (3) one side, and second lock nut (68) can butt in second grade sealing washer (65).

6. A multi-segment cylinder as claimed in claim 1, wherein: slip through-hole (42) have been seted up in one-level piston rod (4), and the axial direction setting of one-level piston rod (4) is followed in slip through-hole (42) of one-level piston rod (4) and runs through one-level piston rod (4) to slip through-hole (42), and in slip through-hole (42) in-connection of one-level piston rod (4) has beat copper sheathing (421), and second grade piston rod (5) sliding connection is in beat copper sheathing (421).

7. A multi-segment cylinder as claimed in claim 5, wherein: first lock nut (64) are close to one-level sealing washer (61) one side and have been seted up a plurality of groove (641) of stirring, one-level piston rod (4) correspond one-level sealing washer (61) position department and are provided with a plurality of balls (45), ball (45) can slide and can butt in one-level sealing washer (61) along the radial direction of one-level piston rod (4), it has elastic dwang (44) all to articulate to correspond every ball (45) position department in one-level piston rod (4), ball (45) are connected in the tip of dwang (44), the equal fixedly connected with of ball (45) one end is kept away from in every dwang (44) dials piece (46), dial piece (46) and can stretch out one-level piston rod (4), and can stretch into in groove (641) of stirring of first lock nut (64).

8. A multi-segment cylinder as claimed in claim 6, wherein: the poking block (46) is far away from the rotating rod (44) and is provided with a poking inclined surface (461), and the poking inclined surface (461) is arranged along the axial direction of the primary piston rod (4).

9. A multi-segment cylinder as claimed in claim 6, wherein: the first locking nut (64) is connected with a push rod (643) in a sliding mode corresponding to each toggle groove (641) in position, the side wall of each push rod (643) is provided with a plurality of clamping blocks (644), the positions of the first locking nut (64) corresponding to each clamping block (644) are provided with clamping grooves (645), and the push rod (643) can abut against the toggle blocks (46) when the clamping blocks (644) are clamped in the clamping grooves (645).