CN114263653B

CN114263653B - Multistage cylinder

Info

Publication number: CN114263653B
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: 2024-02-23
Anticipated expiration: 2041-12-27
Also published as: CN114263653A

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 tip of one-level piston rod is outstanding cylinder body tip, be equipped with the second grade piston rod in the one-level 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 outstanding cylinder body of 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

Multistage cylinder

Technical Field

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

Background

The cylinder consists of cylinder barrel, end cover, piston rod, piston ring, etc. 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, part of air is discharged from the air outlet port, so that the pressure at the air inlet port is higher than the pressure at the air outlet port, and the piston rod extends outwards; when the cylinder barrel is inflated through the exhaust port, part of air is discharged from the air inlet port, so that the pressure at the air inlet port is smaller than the pressure at the exhaust port, and the piston rod is retracted inwards.

At present, when sanding treatment is carried out on the surface of a wood board, a sanded abrasive belt is required to be used, an air cylinder pushes a sand roller to enable the abrasive belt to be abutted to the wood board, a layer of lining belt is sleeved on the inner wall of the abrasive belt generally, and the other air cylinder pushes a rotary roller to enable the lining belt to squeeze the abrasive belt, so that the abrasive belt can be abutted to the wood board all the time. And starting the sand roller to rotate, so that the abrasive belt can polish the uneven surface of the wood board.

With respect to the related art described above, the inventors consider that the volumes of the two cylinders are excessively large, taking up excessive space, affecting the operation of the worker.

Disclosure of Invention

In order to reduce the space occupied by the air cylinder, two pushing effects can be respectively realized by the air cylinder, and the multi-section air cylinder is provided.

The application provides a multistage cylinder adopts following technical scheme:

the utility model provides a multistage cylinder, includes the cylinder body, has seted up one-level cavity and second grade cavity in the cylinder body, is provided with one-level piston rod in the one-level cavity, and the tip of one-level piston rod is outstanding cylinder body tip, and the one-level piston rod is slided and is equipped with the second grade piston rod in the one-level piston rod, and the one end that the one-level piston rod is outstanding cylinder body of second grade piston rod other end, and 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 above-mentioned technical scheme, when using, fill high-pressure gas in to the one-level cavity in, the one-level piston rod can carry out flexible work in the one-level cavity, after filling high-pressure gas in the second grade cavity, the second grade piston rod can carry out flexible 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 flexible work in the second grade cavity, one-level piston rod and the coaxial motion of second grade piston rod, the effect of two cylinders can be realized in the space that a cylinder body occupy, save the space that the cylinder body occupy, one-level piston rod and second grade piston rod can stretch out and draw back respectively or simultaneously, two operating conditions can be realized to a cylinder body.

Optionally, be provided with the division board in the cylinder body, one-level cavity and second grade cavity are located the division board both sides respectively, and the second grade piston rod runs through the division board setting, and division board corresponds second grade cavity one side fixedly connected with partition sleeve, and the second grade piston rod is located the partition sleeve, and division board is close to second grade piston rod position department and is provided with the leak protection ring, leak protection ring butt in the second grade piston rod.

By adopting the technical scheme, when a user uses the device, the first-stage cavity and the second-stage cavity are layered clearly by the partition plate and the partition sleeve, so that the first-stage piston rod is prevented from entering the second-stage cavity; simultaneously, two ends of the leakage-proof ring respectively prop against the secondary piston rod and the partition plate, so that gaps can not be generated between the secondary piston rod and the partition plate, and gas in the primary cavity can not permeate into the secondary cavity.

Optionally, one-level piston rod and second grade piston rod all are provided with the piston ring that is used for making self removal, and the piston ring is including connecting the one-level sealing washer on the one-level piston rod, and one-level sealing washer inner wall is provided with first sealing ring, and first sealing ring and one-level sealing washer homoenergetic butt in one-level piston rod, one-level sealing washer outer wall are provided with first sealed thick ring, and first sealed thick ring can the butt in cylinder body inner wall.

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

Optionally, the piston ring is still including connecting the second sealing washer on the second piston rod, and second sealing washer inner wall is provided with the second sealing washer, and second sealing washer homoenergetic butt in the second piston rod, and second sealing washer outer wall is provided with the thick ring of second seal, and the thick ring of second seal can the butt in separating the cover inner wall.

Through adopting above-mentioned technical scheme, when the user uses, second sealing ring snare is on the second piston rod after, the second sealing ring on the second sealing ring supports tightly the second piston rod, thereby reduce the gap between second piston rod and the second sealing ring, guarantee the airtight between second piston rod and the second sealing ring, the second thick ring on the second sealing ring supports tightly the spacer inner wall simultaneously, thereby reduce the gap between spacer inner wall and the second sealing ring, guarantee the airtight between spacer inner wall and the second sealing ring, second sealing ring and the thick ring of second seal can guarantee the airtight between second piston rod and the spacer inner wall jointly, guarantee that the second piston rod can normally remove after the high-pressure gas fills in the second cavity, the second sealing ring can support to the division board simultaneously, prevent that the second piston rod from removing always, guarantee that the motion scope of second piston rod is the axial length of second cavity.

Optionally, the first-stage piston rod and the second-stage piston rod are threaded with first lock nut and second lock nut respectively, and first lock nut is located one side of the first-stage sealing washer near the division board, and first lock nut can the butt in one-stage sealing washer, and the second lock nut is located one side of the second-stage sealing washer far away from the division board, and second lock nut can the butt in the second-stage sealing washer.

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

Optionally, the one-level piston rod has been seted up and has been slided the through-hole, and the through-hole that slides sets up along the axial direction of one-level piston rod and runs through the one-level piston rod, and the second grade piston rod slides and locates in the through-hole that slides of one-level piston rod, and the through-hole that slides of one-level piston rod is connected with beat copper sheathing, and second grade piston rod sliding connection is in beat copper sheathing.

Through adopting above-mentioned technical scheme, when the user uses, the second grade piston rod slides through the through-hole that slides of one-level piston rod to guarantee both coaxial movements, the condition that the skew copper sheathing can not appear the skew when the second grade piston rod moves in the through-hole that slides of one-level piston rod simultaneously guarantees the stability when one-level piston rod and second grade piston rod move.

Optionally, a plurality of toggle grooves are offered to first lock nut near one side of the 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 along the radial direction of one-level piston rod and can the butt in the one-level sealing washer, it has elastic dwang to correspond every ball position department all to articulate in the one-level piston rod, the ball is connected in the tip of dwang, every dwang is kept away from equal fixedly connected with of ball one end and is toggled the piece, toggle the piece and can stretch out the one-level piston rod, and can stretch into in the toggle groove of first lock nut.

Through adopting above-mentioned technical scheme, when the user uses, install the one-level sealing washer behind the one-level piston rod, the one-level sealing washer butt is in the ball and continue to remove along the ball, the ball is pushed to in the one-level piston rod by the one-level sealing washer, the dwang begins to rotate simultaneously, and stretch out the one-level piston rod with the stirring piece of self other end, then screw up first lock nut, first lock nut butt is to stirring the piece, stir the piece and can move into the stirring inslot of first lock nut, along with the rotation of first lock nut, stir the piece and shift the groove and push away to in the one-level piston rod by first lock nut, other stirring the groove on the first lock nut rotates when stirring piece position department, stir the piece and can move into stirring inslot again, first lock nut and one-level sealing washer are mutually supported tightly the back, stir the piece and be located the stirring inslot of first lock nut, guarantee that first lock nut can not autorotation, guarantee that the condition that first lock nut and one-level sealing washer can not appear is loose, guarantee the locking effect of first lock nut.

Optionally, the stirring inclined plane has been seted up to stirring piece department of keeping away from the dwang position, stirs the inclined plane and sets up along the axial direction of one-level piston rod.

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

Optionally, the first lock nut corresponds every and stirs equal sliding connection in groove position department and have 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 the first lock nut corresponding every joint piece position department, and the catch bar can the butt in stirring the piece when joint piece joint 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 moved back the normal position by dwang and stirring the piece, the catch bar after the removal stretches out the promotion through-hole and moves to stir in the inslot simultaneously, and the catch bar is close to one end of one-level piston rod and the inner peripheral surface parallel of first lock nut, 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 unscrew 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 first-stage cavity, the second-stage cavity, the first-stage piston rod and the second-stage piston rod saves the space occupied by the cylinder body of the cylinder, the first-stage piston rod and the second-stage piston rod can be respectively or simultaneously telescopic, and one cylinder body can realize two working states;

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

3. the first lock nut and the second lock nut ensure that the primary sealing ring cannot slide and shake on the primary piston rod, ensure the sealing effect of the primary sealing ring, ensure that the secondary sealing ring cannot slide and shake on the secondary piston rod, and ensure the sealing effect of the secondary sealing ring.

Drawings

FIG. 1 is a schematic overall structure 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 portion E of FIG. 2;

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

FIG. 9 is a cross-sectional view of the overall structure of a second embodiment of the present application;

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

FIG. 11 is a cross-sectional view of a first cage nut structure according to a second embodiment of the present application;

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

Reference numerals illustrate: 1. a cylinder; 11. a moving groove; 12. a protruding hole; 13. a limiting ring; 131. a closed loop; 132. closing the groove; 14. a bottom cover; 141. a bottom ring; 142. a bottom plate; 2. sealing cover; 21. a sealing plate; 22. sealing sleeve; 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. a separation ring groove; 36. a separation ring; 37. a placement groove; 38. a leak-proof ring; 381. a deformation groove; 4. a first-stage piston rod; 41. a first ring groove; 42. a sliding through hole; 421. deflection copper sleeve; 43. a rotating groove; 431. an abutting port; 432. a stretching opening; 44. a rotating lever; 45. a ball; 46. a poking block; 461. stirring the inclined plane; 5. a second-stage piston rod; 51. a second ring groove; 6. piston rings; 61. a primary seal ring; 62. a first inner ring groove; 621. a first seal ring; 63. a first outer ring groove; 631. a first seal thick ring; 6311. buffer tank I; 6312. buffer tank II; 64. a first lock nut; 641. a toggle groove; 642. pushing the through hole; 643. a push rod; 644. a clamping block; 645. a clamping groove; 65. a second-stage sealing ring; 66. a second inner ring groove; 661. a second seal ring; 67. a second outer ring groove; 671. a second seal thick ring; 6711. buffer groove III; 6712. buffer groove IV; 68. a second lock nut; 7. an air intake device; 71. a first air inlet hole; 711. an air inlet vertical hole; 72. a first air intake bolt; 73. a second air inlet hole; 74. a second air intake bolt; 8. an inflator; 81. a first air charging hole; 811. a first inflation tube; 82. a second air charging hole; 821. and a second inflation tube.

Detailed Description

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

The embodiment of the application discloses a multistage cylinder.

Example 1: referring to fig. 1 and 2, a multi-stage cylinder includes a cylinder body 1, the cylinder body 1 is provided with a moving groove 11, the moving groove 11 is a cylindrical groove and is arranged along the axial direction of the cylinder body 1, the top of the cylinder body 1 is provided with a sealing cover 2, and the bottom of the cylinder body 1 is provided with a bottom cover 14. The movable groove 11 of the cylinder body 1 is internally provided with a separation plate 3, the separation plate 3 is fixedly connected to the middle position of the cylinder body 1, and the separation plate 3 covers the cross section of the cylinder body 1. The division board 3 separates the removal groove 11 into one-level cavity 31 and second grade cavity 32, is provided with one-level piston rod 4 in the one-level cavity 31 of cylinder body 1, and one-level piston rod 4 outstanding sealed lid 2 is provided with second grade piston rod 5 in the one-level piston rod 4, and second grade piston rod 5 is located second grade cavity 32, and second grade piston rod 5 outstanding one-level piston rod 4, and second grade piston rod 5 both ends homoenergetic stretches out cylinder body 1. The bottoms of the primary piston rod 4 and the secondary piston rod 5 are respectively provided with a piston ring 6, 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 positions corresponding to the primary cavity 31 and the secondary cavity 32.

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 1, the sealing sleeve 22 is arranged along the axial direction of the cylinder 1, and the primary piston rod 4 is slidably arranged in the sealing sleeve 22. The sealing plate 21 is fixedly connected to one side of the sealing sleeve 22, which is far away from the partition plate 3, the cross section area of the sealing plate 21 is larger than that of the cylinder body 1, and the sealing plate 21 can be abutted against the cylinder body 1. When a user uses the sealing sleeve 22 is clamped with the cylinder body 1, so that the sealing sleeve 22 and the sealing plate 21 are convenient for the user to replace. The sealing sleeve 22 is internally 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 a user uses the sealing copper sleeve 23, the sealing sleeve 22 and the primary piston rod 4 are sealed, and the tightness of the primary cavity 31 is ensured.

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 engaged 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 abut against the cylinder 1. When the bottom ring 141 is used by a user, the bottom ring 141 is clamped to the cylinder body 1, so that the user can conveniently replace the bottom ring 141 and the 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 near 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 in the primary piston rod 4 at the first ring groove 41. The inner wall of the primary seal ring 61 is provided with a first inner ring groove 62. A first sealing ring 621 is placed in the first inner ring groove 62 of the primary sealing ring 61, and both the first sealing ring 621 and the primary sealing ring 61 can be abutted against the primary 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 positioned on the same horizontal plane. A first thick sealing ring 631 is placed in the first outer ring groove 63 of the primary sealing ring 61, and the first thick sealing ring 631 can be abutted against the inner wall of the cylinder 1. The first locking nut 64 is in threaded connection with the first piston rod 4 at a position close to the partition plate 3, the first locking nut 64 can move along the axial direction of the first piston rod 4 and can abut against the first sealing ring 61, and the first locking nut 64 is located on one side of the first sealing ring 61 close to the partition plate 3.

When the piston rod is used by a user, the primary sealing ring 61 is sleeved on the primary piston rod 4 and moved to the first annular groove 41, and then the first locking nut 64 is sleeved on the primary piston rod 4 and screwed until the first locking nut 64 abuts against the primary sealing ring 61, so that the primary sealing ring 61 is prevented from sliding off the primary piston rod 4; the first sealing ring 621 can abut against the primary piston rod 4, thereby preventing gas from flowing from the gap between the primary piston rod 4 and the primary sealing ring 61, and ensuring tightness between the primary piston rod 4 and the primary sealing ring 61. The first thick sealing ring 631 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 primary sealing ring 61, tightness between the cylinder body 1 and the primary sealing ring 61 is ensured, and the air inlet and outlet processes can be normally performed.

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 a user uses the device, the deflection copper sleeve 421 prevents the secondary piston rod 5 from deflecting in the sliding through hole 42 of the primary piston rod 4, so that the stability of the secondary piston rod 5 during movement is ensured.

Referring to fig. 2 and 3, an annular buffer groove one 6311 is formed on a side of the first thick sealing ring 631 close to the first lock nut 64, an annular buffer groove two 6312 is formed on a side of the first thick sealing ring 631 away from the first lock nut 64, and the buffer groove two 6312 is located on a side of the buffer groove one 6311 away from the first sealing ring 621. When a user uses the first-stage sealing ring 61, the first-stage sealing thick ring 631 can expand or contract to deform through the buffer groove I6311 and the buffer groove II 6312 when moving, so that the first-stage sealing ring 61 is prevented 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 intake device 7 includes a first air intake hole 71 opened at the top of the sealing plate 21, the first air intake hole 71 being disposed along the length direction of the sealing plate 21. The sealing sleeve 22 is provided with an air inlet vertical hole 711 corresponding to the position of the first air inlet 71, 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 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 in a threaded manner corresponding to the first air inlet hole 71, the first air inlet bolt 72 is located at the position, far away from the air inlet vertical hole 711, of the first air inlet hole 71, and the first air inlet bolt 72 can seal the first air inlet hole 71. The air charging device 8 comprises a first air charging hole 81 formed in the cylinder body 1, the first air charging hole 81 is located at the position, close to the partition plate 3, of the primary cavity 31, and the first air charging hole 81 is communicated with the primary cavity 31. A first inflation tube 811 is fixedly connected to the first inflation hole 81 of the cylinder 1.

When the first air inlet bolt 72 is unscrewed during use of a user, the first air inlet hole 71 and the air inlet vertical hole 711 are used for inflating the cavity of the first-stage cavity 31, which is far away from the partition plate 3, and when the air pressure in the cavity of the first-stage cavity 31, which is close to the partition plate 3, is smaller than the air pressure in the cavity of the first-stage cavity 31, which is 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, which is close to the partition plate 3. The first inflation pipe 811 and the first inflation hole 81 inflate the cavity of the first-stage cavity 31, which is close to the partition plate 3, and when the air pressure in the cavity of the first-stage cavity 31, which is close to the partition plate 3, is greater than the air pressure in the cavity of the first-stage cavity 31, which is 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 primary piston rod 4 is provided with a sliding through hole 42, the sliding through hole 42 is provided along the axial direction of the primary piston rod 4, and the sliding through hole 42 is provided through the primary piston rod 4. The partition plate 3 is provided with a partition hole 33 at a position corresponding to the center thereof, and the partition hole 33 is provided along the axial direction of the partition plate 3. The second-stage piston rod 5 is slidably connected in the separation hole 33 of the separation plate 3, the second-stage piston rod 5 is slidably arranged in the sliding through hole 42 of the first-stage piston rod 4, the length of the second-stage piston rod 5 is greater than that of the first-stage piston rod 4, and 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 extension hole 12 at a position corresponding to the center thereof, the extension hole 12 is provided along the axial direction of the secondary piston rod 5, and the secondary piston rod 5 can extend out of the extension hole 12. The bottom plate 142 is fixedly connected with a limiting ring 13 in the corresponding extending hole 12, and the inner wall of the limiting ring 13 can be abutted against the secondary piston rod 5. The bottom plate 142 corresponds and stretches out hole 12 internal fixation and has elastic airtight ring 131, airtight ring 131 fixed connection is in spacing ring 13, and airtight ring 131 is located spacing ring 13 and is close to division board 3 one side, and airtight ring 131 can the butt in second grade piston rod 5, and airtight ring 131 is close to one side of one-level piston rod 4 and has seted up curved airtight groove 132, and the arc mouth of airtight groove 132 sets up towards one-level piston rod 4.

When the sealed cylinder is used by a user, the secondary piston rod 5 can move in the sliding through hole 42 of the primary piston rod 4, one end of the secondary piston rod 5, far away from the sealing cover 2, can extend out from the extending hole 12 of the cylinder body 1, the sealing ring 131 can prevent gaps 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, close to the secondary piston rod 5, of the sealing ring 131 can slightly approach the position, 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, close to the secondary piston rod 5, can slightly approach the sealing ring 131, when the secondary piston rod 5 moves up and down, acting force, close to the secondary piston rod 5, can be generated, and tightness between the secondary piston rod 5 and the cylinder body 1 is further ensured.

Referring to fig. 2 and 6, the secondary piston rod 5 is provided with a second annular 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 in the second ring groove 51 of the secondary piston rod 5. The inner wall of the secondary seal ring 65 is provided with a second inner ring groove 66. A second sealing ring 661 is placed in the second inner ring groove 66 of the second sealing ring 65, and both the second sealing ring 661 and the second sealing ring 65 can be abutted against the second piston rod 5. The outer wall of the secondary sealing ring 65 is provided with a second outer annular groove 67, and the second inner annular groove 66 and the second outer annular groove 67 are positioned on the same horizontal plane. A second thick sealing ring 671 is placed in the second outer ring groove 67 of the secondary sealing ring 65, and the second thick sealing ring 671 can be abutted against the inner wall of the separation sleeve 34. The secondary piston rod 5 is in threaded connection with a second lock nut 68, the second lock nut 68 can move in the axial direction of the secondary piston rod 5 and can abut against the secondary sealing ring 65, and the second lock nut 68 is located on the side, away from the partition plate 3, of the secondary sealing ring 65.

When the secondary piston rod 5 is used by a user, the secondary sealing ring 65 is sleeved on the secondary piston rod 5 and is moved to the second annular groove 51, and then the second locking nut 68 is sleeved on the secondary piston rod 5 and is screwed until the second locking nut 68 abuts against the secondary sealing ring 65, so that the secondary sealing ring 65 is prevented from sliding off the secondary piston rod 5; the second sealing ring 661 can abut against the secondary piston rod 5, so that gas is prevented from flowing from a gap between the secondary piston rod 5 and the secondary sealing ring 65, and tightness between the secondary piston rod 5 and the secondary sealing ring 65 is ensured. 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, tightness between the cylinder body 1 and the secondary sealing ring 65 is ensured, and the air inlet and outlet processes can be normally performed. When the secondary sealing ring 65 moves, the secondary piston rod 5 can be driven to move in the sliding through hole 42 of the primary piston rod 4.

Referring to fig. 2 and 7, a separation ring groove 35 is formed in the separation hole 33 of the separation plate 3, the separation ring groove 35 is located on one side of the separation plate 3 close to the first-stage piston rod 4, and the separation ring groove 35 is communicated with the separation 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 the partition plate 3 and the partition ring 36 are jointly formed with a placing groove 37. The leak protection ring 38 has been placed in the standing groove 37 of division board 3, and leak protection ring 38 butt is in second grade piston rod 5, and arc deformation groove 381 has been seted up to leak protection ring 38 near one side of one-level piston rod 4, and the arc mouth of deformation groove 381 sets up towards one-level piston rod 4. When the anti-leakage ring 38 is used by a user, 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 flowing mutually. The deformation groove 381 on the leakage preventing ring 38 can deform by expansion or contraction, preventing 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 three 6711 is formed on the side, close to the second lock nut 68, of the second seal thick ring 671, an annular buffer groove four 6712 is formed on the side, far away from the second lock nut 68, of the second seal thick ring 671, and the buffer groove four 6712 is located on the side, far away from the second seal ring 661, of the buffer groove three 6711. When the secondary seal ring 65 is used by a user, the second thick sealing ring 671 can be deformed in an extending or contracting manner through the buffer groove III 6711 and the buffer groove IV 6712 when the secondary seal ring 65 moves, so that the second thick sealing ring 671 is prevented from moving out of the secondary seal ring 65 in the moving process of the secondary seal ring 65.

Referring to fig. 2, the air intake device 7 further includes a second air intake hole 73 that is opened in the cylinder 1, the second air intake hole 73 is disposed along the 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 parallel to the first air intake hole 71, the second air intake hole 73 penetrates through the cylinder 1 and the partition sleeve 34, and the second air intake hole 73 is communicated with the secondary cavity 32. The outer wall of the cylinder body 1 is internally and threadedly connected with a second air inlet bolt 74 corresponding to the second air inlet hole 73, and the second air inlet bolt 74 can seal the second air inlet hole 73. The air charging device 8 further comprises a second air charging hole 82 arranged on the bottom plate 142, the second air charging hole 82 is located at a position below the first air charging hole 81 and parallel to the first air charging hole 81, the second air charging hole 82 is located at a position, away from the partition plate 3, of the secondary cavity 32, and the second air charging hole 82 is communicated with the secondary cavity 32. A second inflation tube 821 is fixedly connected to the second inflation hole 82 of the base plate 142.

When the second air inlet bolt 74 is unscrewed during use, the second air inlet hole 73 is used for inflating the cavity of the second-stage cavity 32, which is close to the partition plate 3, and when the air pressure in the cavity of the second-stage cavity 32, which is close to the partition plate 3, is larger than the air pressure in the cavity of the second-stage cavity 32, which is far away from the partition plate 3, the second-stage sealing ring 65 moves in the direction away from the partition plate 3, and the second-stage sealing ring 65 drives the second-stage piston rod 5 to move in the sliding through hole 42 of the first-stage piston rod 4. The second inflation pipe 821 and the second inflation hole 82 inflate the chamber of the second cavity 32 far away from the partition plate 3, when the air pressure in the chamber of the second cavity 32 near the partition plate 3 is smaller than the air pressure in the chamber of the second cavity 32 far away from the partition plate 3, the second sealing ring 65 moves towards the direction near the partition plate 3, and the second sealing ring 65 drives the second piston rod 5 to move in the sliding through hole 42 of the first piston rod 4.

The implementation principle of the embodiment 1 is as follows: when the piston rod sealing device is used by a user, the primary sealing ring 61 is sleeved at the first annular groove 41 of the primary piston rod 4, then the first locking nut 64 is screwed until the primary sealing ring 61 is abutted, and the primary sealing ring 621 on the primary sealing ring 61 can be abutted against the primary piston rod 4, so that the tightness between the primary piston rod 4 and the primary sealing ring 61 is ensured. The first thick sealing ring 631 on the first-stage sealing ring 61 can abut against the inner wall of the cylinder body 1, so that the tightness between the cylinder body 1 and the first-stage sealing ring 61 is ensured. The secondary sealing ring 65 is sleeved on the second annular groove 51 of the secondary piston rod 5, and then the second locking nut 68 is screwed until the secondary sealing ring 65 is abutted, and the second sealing ring 661 on the secondary sealing ring 65 can be abutted against the secondary piston rod 5, so that the tightness between the secondary piston rod 5 and the secondary sealing ring 65 is ensured. The second thick sealing ring 671 on the secondary sealing ring 65 can abut against the inner wall of the cylinder body 1, so that the tightness between the cylinder body 1 and the secondary sealing ring 65 is ensured. When the primary piston rod 4 is required to be used, the first air inlet bolt 72 is unscrewed, 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 is retracted into the cylinder body 1. After the first inflation hole 81 is inflated through the first inflation pipe 811 and the air amount in the cavity of the primary cavity 31 close to the partition plate 3 is increased, the primary sealing ring 61 drives the primary piston rod 4 to move away from the partition plate 3, so that the primary piston rod 4 extends out of the cylinder body 1. When the secondary piston rod 5 is needed to be used, the second air inlet bolt 74 is unscrewed to charge air to the second air inlet hole 73, air enters the cavity of the secondary cavity 32, which is close to the partition plate 3, and after the air amount in the cavity of the secondary cavity 32, which is close to the partition plate 3, is increased, the secondary sealing ring 65 moves 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 is retracted into the cylinder body 1. After the air quantity in the cavity of the second-stage cavity 32 far away from the partition plate 3 is increased, the second-stage sealing ring 65 approaches the partition plate 3, and the second-stage sealing ring 65 drives the second-stage piston rod 5 to move, so that the second-stage piston rod 5 extends out of the cylinder body 1, the primary-stage piston rod 4 and the second-stage piston rod 5 can be respectively subjected to telescopic movement, and the primary-stage piston rod 4 is sleeved outside the second-stage piston rod 5, so that the occupied space of the two piston rods can be saved.

Example 2: referring to fig. 8 and 9, the present embodiment is different from embodiment 1 in that the first-stage piston rod 4 is symmetrically provided with a rotation groove 43 (refer to fig. 10) at a position corresponding to the first ring groove 41, and the rotation groove 43 is provided along the axial direction of the first-stage piston rod 4. The first-stage piston rod 4 is provided with an abutting port 431 and a stretching port 432 corresponding to the position of the rotating groove 43 respectively, the abutting port 431 and the stretching port 432 are both communicated with the rotating groove 43, the abutting port 431 is located at one end of the rotating groove 43 away from the first locking nut 64, and the stretching port 432 is located at one end of the rotating groove 43 close to the first locking nut 64. The first-stage piston rod 4 is hinged with a rotating rod 44 with elasticity in each rotating groove 43, the rotating rod 44 is hinged with the first-stage piston rod 4 in the middle position corresponding to the rotating rod 44, the axial direction of the hinge shaft is perpendicular to the axial direction of the first-stage piston rod 4, and the rotating rod 44 is arranged along the axial direction of the first-stage piston rod 4. The rotary 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 poking grooves 641 are formed in the side, close to the primary seal ring 61, of the first lock nut 64, the poking grooves 641 are arranged in an array along the circumference of the first lock nut 64, and the poking grooves 641 are located at the position, close to the primary piston rod 4, of the first lock nut 64. Each rotating rod 44 is fixedly connected with a poking block 46 at the position corresponding to the extending opening 432, and the poking block 46 can extend out of the extending opening 432 and can extend into the poking groove 641 of the first locking nut 64. The position of the poking block 46 away from the rotating rod 44 is provided with a poking inclined plane 461, the first lock nut 64 can be abutted against the poking inclined plane 461 to rotate, the poking block 46 can enter the rotating groove 43, and the first lock nut 64 cannot rotate when not abutted against the poking inclined plane 461.

When the primary sealing ring 61 is slid to the position of the first annular groove 41 of the primary piston rod 4 by a user, the primary sealing ring 61 is abutted against the balls 45 and pushes the balls 45 into the rotating groove 43, meanwhile, the rotating rod 44 rotates, so that the stirring block 46 at the other end of the rotating rod 44 extends out of the extending opening 432, the first locking nut 64 is sleeved on the primary piston rod 4 and then rotates the first locking nut 64, the first locking nut 64 is abutted against the stirring block 46, the first locking nut 64 is continuously rotated, the stirring block 46 can move into the stirring groove 641 of the first locking nut 64 and continuously rotate the first locking nut 64, the first locking nut 64 can be abutted against the stirring inclined surface 461 of the stirring block 46 and rotate along the stirring block 46, and when the stirring block 64 is abutted against the first locking nut 61, the stirring block 46 leaves the stirring groove 641 and then enters the rotating groove 43 through the extending opening 432, the other stirring grooves 641 on the first locking nut 64 can extend out of the rotating groove 43 again and enter the groove 641, and only the first locking nut 64 is prevented from being reversed when the first locking nut 64 abuts against the first locking nut 61, and the stirring block 46 is located in the first inclined surface 641, and the first locking nut 64 is prevented from being reversed, and only the locking nut 64 is prevented from being locked.

Referring to fig. 10 and 12, a push through hole 642 is formed in a side wall of the first lock nut 64 corresponding to each of the dial slots 641, the push through hole 642 is disposed along a radial direction of the first lock nut 64, and the push through hole 642 is communicated with the dial slot 641 and penetrates the first lock nut 64. The first lock nut 64 is slidably connected with a push rod 643 in each push through hole 642, the push rod 643 slides along the radial direction of the first lock nut 64, and the cross section of the push rod 643 in the radial direction covers the push through holes 642. Two clamping blocks 644 are symmetrically and fixedly connected to the side wall of each push rod 643. The push through hole 642 of the first lock nut 64 is provided with a clamping groove 645 corresponding to each clamping block 644, 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 be abutted against the poking block 46, and the push rod 643 is flush with the inner peripheral surface of the first lock nut 64.

When the user needs to change one-level sealing washer 61 during the use, promote catch lever 643, catch lever 643 moves to one-level piston rod 4 direction, catch lever 643 drives joint piece 644 and moves into joint groove 645, prevents to stir piece 46 and move catch lever 643 back to normal position, and catch lever 643 can stretch out from push through-hole 642 and move to stir in groove 641 simultaneously, and catch lever 643 promotes to stir piece 46 and shifts out and stir groove 641, guarantees that first lock nut 64 can normally rotate, twists back first lock nut 64 from one-level piston rod 4 back, can take off one-level sealing washer 61 from one-level piston rod 4.

The implementation principle of the embodiment 2 is as follows: when the primary sealing ring 61 is pushed to move to the first annular groove 41 of the primary piston rod 4, the poking block 46 is pressed into the rotating groove 43, then the primary sealing ring 61 is pushed until the primary sealing ring 61 is abutted against the balls 45, the balls 45 are pressed into the rotating groove 43 by the primary sealing ring 61, meanwhile, the rotating rod 44 rotates around the hinge shaft, and the poking block 46 at the other end of the rotating rod 44 can extend out of the extending opening 432. When the first lock nut 64 is rotated, the first lock nut 64 gradually approaches the primary seal ring 61, when the first lock nut 64 rotates to the position of the stirring block 46, the stirring block 46 can sequentially enter the stirring groove 641 of the first lock nut 64, and along with the rotation of the first lock nut 64, the position of the stirring groove 641 of the first lock nut 64 can abut against the stirring inclined plane 461 of the stirring block 46 and rotate against the stirring inclined plane 461 of the stirring block 46, and the stirring block 46 gradually moves away from the stirring groove 641 under the action of the stirring inclined plane 461 and moves into the rotating groove 43 through the stretching opening 432. When the other poking grooves 641 on the first lock nut 64 are rotated to the position of the poking block 46, the poking block 46 stretches out of the rotating groove 43 again and enters the poking groove 641, and along with the rotation of the first lock nut 64, the poking block 46 moves out of the poking groove 641 again until the first lock nut 64 abuts against the primary sealing ring 61; after the first lock nut 64 and the primary seal ring 61 are abutted against each other, the stirring block 46 moves into the stirring groove 641 of the first lock nut 64, the stirring inclined surface 461 of the stirring block 46 ensures that the first lock nut 64 can only rotate along one direction, the first lock nut 64 is ensured not to be reversed, and the locking effect of the first lock nut 64 is ensured.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A multi-section cylinder comprising a cylinder body (1), characterized in that: a first-stage cavity (31) and a second-stage cavity (32) are formed in the cylinder body (1), a first-stage piston rod (4) is arranged in the first-stage cavity (31), the end part of the first-stage piston rod (4) protrudes out of the end part of the cylinder body (1), a second-stage piston rod (5) is arranged in the first-stage piston rod (4), one end of the second-stage piston rod (5) is positioned 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) protruding 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 second-stage piston rod (5);

the cylinder body (1) is internally provided with a separation plate (3), a first-stage cavity (31) and a second-stage cavity (32) are respectively positioned at two sides of the separation plate (3), a second-stage piston rod (5) penetrates through the separation plate (3), one side of the separation plate (3) corresponding to the second-stage cavity (32) is fixedly connected with a separation sleeve (34), the second-stage piston rod (5) is positioned in the separation sleeve (34), a leakage-proof ring (38) is arranged at the position, close to the second-stage piston rod (5), of the separation plate (3), and the leakage-proof ring (38) is abutted to the second-stage piston rod (5);

the piston rod (4) and the secondary piston rod (5) are both provided with piston rings (6) for enabling the piston rod to move, each piston ring (6) comprises a primary sealing ring (61) connected to the primary piston rod (4), the inner wall of each primary sealing ring (61) is provided with a first sealing ring (621), the first sealing rings (621) and the primary sealing rings (61) can be abutted to the primary piston rod (4), the outer wall of each primary sealing ring (61) is provided with a first thick sealing ring (631), and the first thick sealing rings (631) can be abutted to the inner wall of the cylinder body (1);

the piston ring (6) further comprises a second sealing ring (65) connected to the second piston rod (5), a second sealing ring (661) is arranged on the inner wall of the second sealing ring (65), the second sealing ring (661) and the second sealing ring (65) can be abutted to the second piston rod (5), a second sealing thick ring (671) is arranged on the outer wall of the second sealing ring (65), and the second sealing thick ring (671) can be abutted to the inner wall of the separation sleeve (34);

the first-stage piston rod (4) and the second-stage piston rod (5) are respectively in threaded connection with a first locking nut (64) and a second locking nut (68), the first locking nut (64) is positioned on one side of the first-stage sealing ring (61) close to the partition plate (3), the first locking nut (64) can be abutted to the first-stage sealing ring (61), the second locking nut (68) is positioned on one side of the second-stage sealing ring (65) far away from the partition plate (3), and the second locking nut (68) can be abutted to the second-stage sealing ring (65);

a first annular groove (41) is inserted in the position of the outer wall of the primary piston rod (4) close to the partition plate (3), a primary sealing ring (61) is positioned at the position of the first annular groove (41), rotating grooves (43) are symmetrically formed in the position of the primary piston rod (4) corresponding to the first annular groove (41), the rotating grooves (43) are arranged along the axial direction of the primary piston rod (4), an abutting port (431) and a stretching port (432) are respectively formed in the position of the primary piston rod (4) corresponding to the rotating grooves (43), both the abutting port (431) and the stretching port (432) are communicated with the rotating grooves (43), the abutting port (431) is positioned at one end of the rotating groove (43) far away from the first locking nut (64), the extending port (432) is positioned at one end of the rotating groove (43) close to the first locking nut (64), the first-stage piston rod (4) is hinged with elastic rotating rods (44) corresponding to each rotating groove (43), the rotating rods (44) are hinged with the first-stage piston rod (4) corresponding to the middle positions of the rotating rods, the axial direction of the hinged shaft is perpendicular to the axial direction of the first-stage piston rod (4), the rotating rods (44) are arranged along the axial direction of the first-stage piston rod (4), the positions of the rotating rods (44) corresponding to the abutting port (431) are fixedly connected with balls (45), 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);

a plurality of poking grooves (641) are formed in one side, close to the primary sealing ring (61), of the first locking nut (64), poking blocks (46) are fixedly connected to positions, corresponding to the stretching openings (432), of each rotating rod (44), and the poking blocks (46) can stretch out of the stretching openings (432) and can stretch into the poking grooves (641) of the first locking nut (64);

a poking inclined surface (461) is arranged at the position, far away from the rotating rod (44), of the poking block (46), and the poking inclined surface (461) is arranged along the axial direction of the primary piston rod (4);

when the first lock nut (64) is rotated, the first lock nut (64) gradually approaches the primary sealing ring (61), when the first lock nut (64) rotates to the position of the stirring block (46), the stirring block (46) can sequentially enter the stirring groove (641) of the first lock nut (64), along with the rotation of the first lock nut (64), the stirring groove (641) of the first lock nut (64) can be abutted against the stirring inclined surface (461) of the stirring block (46) and rotate along with the stirring inclined surface (461) of the stirring block (46), and the stirring block (46) gradually keeps away from the stirring groove (641) under the action of the stirring inclined surface (461) and moves into the rotating groove (43) through the stretching opening (432).

2. A multi-stage cylinder according to claim 1, wherein: the one-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 one-stage piston rod (4) and penetrates through the one-stage piston rod (4), the two-stage piston rod (5) is slidably arranged in the sliding through hole (42) of the one-stage piston rod (4), the sliding through hole (42) of the one-stage piston rod (4) is internally connected with a deflection copper sleeve (421), and the two-stage piston rod (5) is slidably connected in the deflection copper sleeve (421).

3. A multi-stage cylinder according to claim 1, wherein: the first lock nuts (64) are slidably connected with pushing rods (643) at positions corresponding to the poking grooves (641), a plurality of clamping blocks (644) are arranged on the side walls of each pushing rod (643), clamping grooves (645) are formed in positions corresponding to the first lock nuts (64) and the clamping blocks (644), and the pushing rods (643) can be abutted to the poking blocks (46) when the clamping blocks (644) are clamped in the clamping grooves (645).