阅读说明：本技术 一种多级活塞液压拉力油缸 (Multistage piston hydraulic tension oil cylinder ) 是由 李保君 杜家波 于 2020-11-26 设计创作，主要内容包括：本发明公开了一种多级活塞液压拉力油缸,包括第一固定结构、导向结构、除尘结构、活塞杆、压盖、第二固定结构、第一缸体、第二缸体和驱动结构；进而便于通过多个第二固定结构上的驱动结构驱动多个第二固定结构分别固定压盖和第一缸体、第一缸体与第二缸体,进而使压盖与第一缸体、第一缸体与第二缸体之间的安装拆卸更加方便快捷,同时使受力更加均匀稳定,使安装效果更好,同时驱动结构的设置使驱动更加省力,导向结构的设置便于保护活塞杆,有效防止活塞杆损坏,同时使活塞杆的侧向抗压能力更强,同时活塞杆与导向结构通过第一固定结构固定连接,进而使活塞杆与导向结构之前安装拆卸更加方便。(The invention discloses a multi-stage piston hydraulic tension oil cylinder which comprises a first fixing structure, a guide structure, a dust removing structure, a piston rod, a gland, a second fixing structure, a first cylinder body, a second cylinder body and a driving structure, wherein the first fixing structure is arranged on the piston rod; and then be convenient for drive a plurality of second fixed knot of structure drive through on a plurality of second fixed knot construct and fix gland and first cylinder body respectively, first cylinder body and second cylinder body, and then make gland and first cylinder body, installation between first cylinder body and the second cylinder body is dismantled more convenient and fast, make the atress more even stable simultaneously, it is better to make the installation effect, the setting up of drive structure makes the drive more laborsaving simultaneously, guide structure's setting is convenient for protect the piston rod, effectively prevent the piston rod damage, make the lateral compressive capacity of piston rod stronger simultaneously, the piston rod passes through first fixed knot structure fixed connection with guide structure simultaneously, and then it is more convenient to make installation dismantlement before piston rod and the guide structure.)

1. The utility model provides a multistage piston hydraulic pressure pulling force hydro-cylinder which characterized in that: the dust removal device comprises a first fixing structure (1), a guide structure (2), a dust removal structure (3), a piston rod (4), a gland (5), a second fixing structure (6), a first cylinder body (7), a second cylinder body (8) and a driving structure (9); two first cylinder bodies (7) are symmetrically arranged at two ends of the second cylinder body (8), the gland (5) is arranged at one end, away from the second cylinder body (8), of the first cylinder body (7), the gland (5) is fixedly connected with the first cylinder body (7) and the first cylinder body (7) is fixedly connected with the second cylinder body (8) through the second fixing structure (6), and the driving structure (9) for driving is arranged on the second fixing structure (6); the gland (5) is provided with the piston rods (4) in sliding connection, and two ends of the two piston rods (4) extend into the first cylinder body (7) and the second cylinder body (8); one end, deviating from the gland (5), of the piston rod (4) is fixed to the first fixing structure (1), and the guide structure (2) used for supporting and protecting the piston rod (4) is arranged between the two first fixing structures (1); the dust removal structure (3) for removing dust is arranged in the guide structure (2).

2. The multi-stage piston hydraulic tension cylinder as claimed in claim 1, wherein: the second fixing structure (6) comprises a containing frame (61), clamping frames (62), a guide sleeve (63), a sliding rod (64) and a second screw rod (65), the cross section of the edge of the gland (5) is triangular or trapezoidal, the end parts of the first cylinder body (7) and the second cylinder body (8) are in a cross shape, the cross sections of the edge parts of the end parts of the first cylinder body (7) and the second cylinder body (8) are triangular or trapezoidal, the two clamping frames (62) are symmetrically clamped at the joint of the gland (5) and the first cylinder body (7), the clamping frames (62) are in a U-shaped structure along the plane direction of the gland (5), the clamping frames (62) are in a U-shaped structure along the direction perpendicular to the gland (5), and the two clamping frames (62) are symmetrically clamped at the joint of the first cylinder body (7) and the second cylinder body (8), two of two bisymmetry card frame (62) go up the symmetry respectively and are equipped with two uide bushing (63) with slide bar (64), with one side slide bar (64) with sliding connection between uide bushing (63), second lead screw (65) with threaded connection between slide bar (64), two bisymmetry be two be equipped with on one of them in card frame (62) accomodate frame (61), second lead screw (65) with accomodate and rotate between the frame (61) and be connected.

3. The multi-stage piston hydraulic tension cylinder as claimed in claim 2, wherein: drive structure (9) are including drive wheel (91), guiding axle (92), drive wheel (93), gear (94), actuating lever (95) and transfer line (96), it connects to be equipped with on frame (61) to accomodate the guiding axle (92) with actuating lever (95), drive wheel (93) are fixed in guiding axle (92), gear (94) are fixed in actuating lever (95), gear (94) with mesh between drive wheel (93), the diameter of gear (94) is less than the diameter of drive wheel (93), drive wheel (91) are fixed in second lead screw (65), two drive wheel (91) with be equipped with between drive wheel (93) and rotate the connection transfer line (96).

4. The multi-stage piston hydraulic tension cylinder as claimed in claim 1, wherein: the first fixing structure (1) comprises a fixing frame (11), a pull ring (12), a clamping block (13), a reset spring (14), a limiting block (15), a first screw rod (16) and a sealing cover (17), one end of the piston rod (4) deviating from the gland (5) is abutted against the fixing frame (11), the pull ring (12) is fixed at one end of the fixing frame (11) deviating from the piston rod (4), one end of the clamping block (13) of the T-shaped structure is slidably connected with the piston rod (4), the other end of the clamping block (13) is clamped with the fixing frame (11), the clamping block (13) penetrates through the reset spring (14), two ends of the reset spring (14) are abutted against the fixing frame (11) and the clamping block (13) respectively, and the first screw rod (16) is rotatably connected with the fixing frame (11), first lead screw (16) with threaded connection between stopper (15), stopper (15) with sliding connection between fixed frame (11), stopper (15) with conflict between fixture block (13), it is right to be equipped with on fixed frame (11) be used for first lead screw (16) seal sealed lid (17).

5. The multi-stage piston hydraulic tension cylinder as claimed in claim 4, wherein: guide structure (2) include overcoat (21), endotheca (22), stiffening rib (23) and recess (24), overcoat (21) with the end of carrying on the back of the body of endotheca (22) is fixed in two respectively fixed frame (11), the rectangle array is equipped with a plurality of W shapes on endotheca (22) stiffening rib (23), endotheca (22) with sliding connection between overcoat (21), stiffening rib (23) with sliding connection between overcoat (21), overcoat (21) orientation the thickness of the tip of the one end of endotheca (22) reduces gradually, endotheca (22) deviate from the one end of stiffening rib (23) is equipped with recess (24).

6. The multi-stage piston hydraulic tension cylinder as claimed in claim 5, wherein: dust removal structure (3) are including removing bits hole (31), two check valve (32), guiding gutter (33) and sealing ring (34), the bottom of overcoat (21) is equipped with sealing ring (34), the inside of sealing ring (34) is equipped with guiding gutter (33), and is a plurality of the one end of removing bits hole (31) run through in overcoat (21) extend to guiding gutter (33), the other one end of removing bits hole (31) run through in overcoat (21) orientation the one end of endotheca (22), be used for admitting air check valve (32) are fixed in overcoat (21) and in the inside of overcoat (21) holds the cavity and switches on, be used for carminative check valve (32) are fixed in sealing ring (34) and with guiding gutter (33) switch on.

Technical Field

The invention relates to the field of pull oil cylinders, in particular to a multi-stage piston hydraulic pull oil cylinder.

Background

The telescopic hydraulic cylinder is also called a multi-stage hydraulic cylinder. The piston cylinder is formed by sleeving two-stage or multi-stage piston cylinders and mainly comprises a gland, a cylinder barrel, a sleeve, a piston and other parts; the two ends of the cylinder barrel are provided with an oil inlet and an oil outlet A and an oil outlet B, when the oil is fed from the port A and returned from the port B, a first-stage piston with a large effective action area is pushed to move firstly, and then a second-stage piston with a small effective action area is pushed to move, because the flow entering the port A is unchanged, the movement speed of the piston with the large effective action area is low, the thrust is large, otherwise, the movement speed is high, the thrust is small, if the oil is fed from the port B and returned from the port A, the second-stage piston returns to the terminal point firstly, and then the first-stage piston returns.

However, when the multi-stage piston hydraulic tension cylinder provided in the patent with the application number of 201320140806.1 is applied to a large-scale mining area or excavator equipment, the sweeps are easily bonded on the piston rod, so that the piston rod is damaged, the stability of transmission is influenced, and the influence is influenced the leakproofness between the piston rod and the gland, the lateral compression resistance and tensile strength of the piston rod are poor, the gland and the first cylinder body, the first cylinder body and the second cylinder body are connected through bolts, the bolts are easily staggered in the bolt connection process, the bolts slide wires are caused, the installation and the disassembly are not convenient and fast enough, and the sealing performance is easily influenced by uneven stress.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a multistage piston hydraulic tension oil cylinder.

The technical scheme adopted by the invention for solving the technical problems is as follows: a multi-stage piston hydraulic tension oil cylinder comprises a first fixing structure, a guide structure, a dust removing structure, a piston rod, a gland, a second fixing structure, a first cylinder body, a second cylinder body and a driving structure; two first cylinder bodies are symmetrically arranged at two ends of the second cylinder body, the gland is arranged at one end of the first cylinder body, which is far away from the second cylinder body, the gland and the first cylinder body, and the first cylinder body and the second cylinder body are fixedly connected through the second fixing structure, and the driving structure for driving is arranged on the second fixing structure; the gland is provided with the piston rods in sliding connection, and two ends of each of the two piston rods extend into the first cylinder body and the second cylinder body; one end of the piston rod, which is far away from the gland, is fixed on the first fixing structure, and a guide structure for supporting and protecting the piston rod is arranged between the two first fixing structures; the inside of guide structure is equipped with and is used for the dust removal structure of dust removal.

Specifically, the second fixing structure comprises a containing frame, clamping frames, guide sleeves, slide rods and a second lead screw, the cross section of the edge of the gland is triangular or trapezoidal, the end parts of the first cylinder body and the second cylinder body are both in a cross shape, the cross section of the edge of the end part of the first cylinder body and the end part of the second cylinder body is triangular or trapezoidal, the connecting part of the gland and the first cylinder body is symmetrically clamped with two clamping frames, the clamping frames are in a U-shaped structure along the plane direction of the gland, the clamping frames are in a U-shaped structure along the direction perpendicular to the gland, the connecting part of the first cylinder body and the second cylinder body is symmetrically clamped with two clamping frames, the two clamping frames which are symmetrical in pairs are respectively provided with two guide sleeves and two slide rods, and the slide rods which are arranged on the same side are in sliding connection with the guide sleeves, the second screw rod is in threaded connection with the sliding rod, the containing frame is arranged on one of the two clamping frames which are symmetrical in pairs, and the second screw rod is rotatably connected with the containing frame.

Specifically, the drive structure includes drive wheel, guiding axle, drive wheel, gear, actuating lever and transfer line, it connects to accomodate to be equipped with on the frame to rotate the guiding axle with the actuating lever, the drive wheel is fixed in the guiding axle, the gear is fixed in the actuating lever, the gear with mesh between the drive wheel, the diameter of gear is less than the diameter of drive wheel, the drive wheel is fixed in the second lead screw, two the drive wheel with be equipped with between the drive wheel and rotate the connection the transfer line.

Specifically, the first fixing structure comprises a fixing frame, a pull ring, a clamping block, a return spring, a limiting block, a first screw rod and a sealing cover, one end of the piston rod, which is far away from the gland, is abutted against the fixed frame, the pull ring is fixed at one end of the fixed frame, which is far away from the piston rod, one end of the clamping block of the T-shaped structure is connected with the piston rod in a sliding way, the other end of the clamping block is clamped with the fixing frame, the clamping block penetrates through the return spring, two ends of the reset spring respectively abut against the fixed frame and the clamping block, the first screw rod is rotatably connected with the fixed frame, the first screw rod is in threaded connection with the limiting block, the limiting block is in sliding connection with the fixed frame, the limiting block is abutted against the clamping block, and the fixing frame is provided with a sealing cover for sealing the first screw rod.

Specifically, guide structure includes overcoat, endotheca, stiffening rib and recess, the overcoat with the back of the body end of the back of the body of endotheca is fixed in two respectively fixed frame, the rectangle array is equipped with a plurality of W shapes on the endotheca the stiffening rib, the endotheca with sliding connection between the overcoat, the stiffening rib with sliding connection between the overcoat, the overcoat is towards the thickness of the tip of the one end of endotheca reduces gradually, the endotheca deviates from the one end of stiffening rib is equipped with the recess.

Specifically, the dust removal structure includes chip removal hole, two check valves, guiding gutter and sealing ring, the bottom of overcoat is equipped with the sealing ring, the inside of sealing ring is equipped with the guiding gutter, and is a plurality of the one end in chip removal hole run through in the overcoat extends to the guiding gutter, the other one end in chip removal hole run through in the overcoat orientation the one end of endotheca, be used for admitting air the check valve is fixed in the overcoat and in the inside of overcoat holds the cavity and switches on, be used for carminative the check valve is fixed in the sealing ring just with the guiding gutter switches on.

The invention has the beneficial effects that:

(1) according to the multistage piston hydraulic tension oil cylinder, two first cylinder bodies are symmetrically arranged at two ends of a second cylinder body, a gland is arranged at one end of the first cylinder body, which is far away from the second cylinder body, the gland is fixedly connected with the first cylinder body and the second cylinder body through second fixing structures, and a driving structure for driving is arranged on the second fixing structures; the pressing cover and the first cylinder body, and the first cylinder body and the second cylinder body are respectively fixed conveniently by driving the plurality of second fixing structures through the driving structures on the plurality of second fixing structures, so that the pressing cover and the first cylinder body, and the first cylinder body and the second cylinder body are more conveniently and quickly mounted and dismounted, the stress is more uniform and stable, the mounting effect is better, and the driving is more labor-saving due to the arrangement of the driving structures; namely: firstly, two clamping frames are symmetrically clamped at the joint of a gland and a first cylinder body or the joint of the first cylinder body and a second cylinder body respectively, then two sliding rods on one clamping frame are clamped with a guide sleeve on the other clamping frame, the end parts of the first cylinder body and the second cylinder body are in a cross shape, so that the sliding rods and the guide sleeves can be conveniently accommodated in an accommodating groove between the gland and the first cylinder body or an accommodating groove between the first cylinder body and the second cylinder body, the structures are more compact, then an inner hexagonal wrench is clamped with a driving rod, the driving rod is rotated, the driving rod drives a gear to rotate anticlockwise, the gear drives a driving wheel to rotate clockwise, the diameter of the driving wheel is larger than that of the gear, the driving wheel is driven more labor-saving, a transmission rod which is rotationally connected is arranged on the driving wheel, the transmission rod is rotationally connected with the driving wheel, a crank connecting rod is further adopted, the driving wheel drives the transmission rod to rotate clockwise, the transmission wheel drives the second screw rod to rotate clockwise, the slide rod slides towards the direction of the guide sleeve, and then two clamping frames slide relatively to abut against the gland and the first cylinder body or the first cylinder body and the second cylinder body, the cross section of the edge of the gland is triangular or trapezoidal, the cross section of the edge of the end part of the first cylinder body and the second cylinder body is triangular or trapezoidal, two clamping frames are symmetrically clamped at the joint of the gland and the first cylinder body, the clamping frames are U-shaped along the plane direction of the gland, the clamping frames are U-shaped along the direction perpendicular to the gland, when the clamping frames move relatively, the clamping frames abut against each other between the first cylinder body and the gland or between the first cylinder body and the second cylinder body, so that the stress between the gland and the first cylinder body is more uniform, and the stress between the first cylinder body and the second cylinder body is more uniform, the actuating lever is in the lateral wall of accomodating the frame simultaneously, and then is convenient for from side drive actuating lever, makes the operation more nimble, and then makes the installation between gland and first cylinder body, first cylinder body and the second cylinder body dismantle convenient and fast more.

(2) According to the multistage piston hydraulic tension oil cylinder, the gland is provided with the piston rods in sliding connection, and two ends of the two piston rods extend into the first cylinder body and the second cylinder body; one end of the piston rod, which is far away from the gland, is fixed on the first fixing structures, and a guide structure for supporting and protecting the piston rod is arranged between the two first fixing structures; the setting of guide structure is convenient for protect the piston rod, effectively prevents that the piston rod from damaging, makes the side direction compressive capacity of piston rod stronger simultaneously, and the piston rod passes through a fixed knot structure fixed connection with guide structure simultaneously, and then makes the piston rod and the guide structure before the installation dismantle more convenient, promptly: when the fixing frame is installed, the end part of the piston rod is clamped with the fixing frame, then the sealing cover is disassembled, the inner hexagonal wrench is clamped with the first lead screw, the first lead screw is rotated, the first lead screw drives the limiting block to slide with the fixing frame in a threaded manner, the limiting block is clamped with the end part of the piston rod, meanwhile, the limiting block abuts against the clamping block, the clamping block slides with the piston rod, the clamping block abuts against the reset spring, the clamping block is clamped with the fixing frame, the clamping block and the limiting block further limit the piston rod and the fixing frame, further, the installation and the disassembly between the fixing frame and the piston rod are more convenient and rapid, simultaneously, when the piston rod slides in the first cylinder body and the second cylinder body, the two piston rods respectively drive the outer sleeve and the inner sleeve to slide through the fixing frame, the outer sleeve and, meanwhile, the outer sleeve and the inner sleeve are arranged, so that the compression resistance of the piston rod is better, the rectangular array on the inner sleeve is provided with a plurality of W-shaped reinforcing ribs, the contact area between the reinforcing ribs and the outer sleeve is further increased, and the stability between the outer sleeve and the inner sleeve is better.

(3) According to the multistage piston hydraulic tension oil cylinder, the dust removal structure for removing dust is arranged inside the guide structure, so that scraps can be conveniently removed from the joint of the guide structure in the process of protecting the piston rod by the guide structure, and further, scraps are effectively prevented from entering the guide structure, namely: when the inner sleeve slides towards the outer sleeve, the thickness of the end part of the outer sleeve, facing one end of the inner sleeve, is gradually reduced, waste scraps on the inner sleeve can be conveniently scraped, when the inner sleeve slides towards the outer sleeve, the accommodating space between the inner sleeve and the outer sleeve is reduced, the pressure between the outer sleeve and the inner sleeve is increased, airflow is discharged to the diversion trench through the one-way valve on the sealing ring and then blown out from the scrap removing hole, the waste scraps are effectively prevented from being accumulated at the joint of the outer sleeve and the inner sleeve, the scrap removing capacity of the inner sleeve and the outer sleeve is further enhanced, meanwhile, when the inner sleeve slides away from the outer sleeve direction, the accommodating cavity between the inner sleeve and the outer sleeve is increased, gas enters the inner sleeve through the one-way valve on the outer sleeve, a filter screen or other components.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the overall structure of a multi-stage piston hydraulic cylinder according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of a connection structure between the guiding structure and the dust removing structure shown in FIG. 2;

FIG. 4 is a schematic structural view of the guide knot shown in FIG. 3;

FIG. 5 is a schematic view of a connection structure of the pressing cover and the second fixing structure shown in FIG. 4;

FIG. 6 is a schematic structural view of the second fastening structure shown in FIG. 5;

FIG. 7 is a schematic view of the connection structure of the guide sleeve and the slide bar shown in FIG. 5;

fig. 8 is a schematic structural view of the dust removing structure shown in fig. 2.

In the figure: 1. the device comprises a first fixing structure, 11, a fixing frame, 12, a pull ring, 13, a clamping block, 14, a return spring, 15, a limiting block, 16, a first screw rod, 17, a sealing cover, 2, a guide structure, 21, an outer sleeve, 22, an inner sleeve, 23, a reinforcing rib, 24, a groove, 3, a dust removal structure, 31, a chip removal hole, 32, a one-way valve, 33, a diversion trench, 34, a sealing ring, 4, a piston rod, 5, a gland, 6, a second fixing structure, 61, a storage frame, 62, a clamping frame, 63, a guide sleeve, 64, a sliding rod, 65, a second screw rod, 7, a first cylinder body, 8, a second cylinder body, 9, a driving structure, 91, a driving wheel, 92, a guide shaft, 93, a driving wheel, 94, a gear, 95, a driving rod, 96 and a driving.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-8, the multistage piston hydraulic tension cylinder according to the present invention includes a first fixing structure 1, a guiding structure 2, a dust removing structure 3, a piston rod 4, a gland 5, a second fixing structure 6, a first cylinder 7, a second cylinder 8, and a driving structure 9; two first cylinder bodies 7 are symmetrically arranged at two ends of the second cylinder body 8, the gland 5 is arranged at one end of the first cylinder body 7, which is far away from the second cylinder body 8, the gland 5 and the first cylinder body 7, and the first cylinder body 7 and the second cylinder body 8 are fixedly connected through the second fixing structure 6, and the driving structure 9 for driving is arranged on the second fixing structure 6; the gland 5 is provided with the piston rods 4 in sliding connection, and two ends of each of the two piston rods 4 extend into the first cylinder 7 and the second cylinder 8; one end of the piston rod 4, which is far away from the gland 5, is fixed to the first fixing structures 1, and the guide structure 2 for supporting and protecting the piston rod 4 is arranged between the two first fixing structures 1; the dust removing structure 3 for removing dust is arranged in the guide structure 2.

Specifically, the second fixing structure 6 includes a storage frame 61, a clamping frame 62, a guide sleeve 63, a sliding rod 64 and a second screw rod 65, the cross section of the edge of the gland 5 is triangular or trapezoidal, the end portions of the first cylinder 7 and the second cylinder 8 are both cross-shaped, the cross section of the edge of the end portions of the first cylinder 7 and the second cylinder 8 is triangular or trapezoidal, the connection portion of the gland 5 and the first cylinder 7 is symmetrically clamped with two clamping frames 62, the clamping frame 62 is U-shaped along the plane direction of the gland 5, the clamping frame 62 is U-shaped along the direction perpendicular to the gland 5, the connection portion of the first cylinder 7 and the second cylinder 8 is symmetrically clamped with two clamping frames 62, two guide sleeves 63 and two sliding rods 64 are symmetrically arranged on the two clamping frames 62 which are symmetrical in pairs respectively, the slide rod 64 and the guide sleeve 63 on the same side are in sliding connection, the second screw rod 65 and the guide sleeve 63 are in sliding connection, the second screw rod 65 and the slide rod 64 are in threaded connection, the storage frame 61 is arranged on one of the two clamping frames 62 which are symmetrical in pairs, and the second screw rod 65 and the storage frame 61 are in rotating connection.

Specifically, the driving structure 9 includes a driving wheel 91, a guide shaft 92, a driving wheel 93, a gear 94, a driving rod 95 and a transmission rod 96, the guide shaft 92 and the driving rod 95 are rotatably connected to the storage frame 61, the driving wheel 93 is fixed to the guide shaft 92, the gear 94 is fixed to the driving rod 95, the gear 94 is engaged with the driving wheel 93, the gear 94 has a diameter smaller than that of the driving wheel 93, the driving wheel 91 is fixed to the second lead screw 65, the driving wheel 91 is rotatably connected to the storage frame 61, and the transmission rod 96 is rotatably connected between the two driving wheels 91 and the driving wheel 93; two first cylinder bodies 7 are symmetrically arranged at two ends of the second cylinder body 8, the gland 5 is arranged at one end of the first cylinder body 7, which is far away from the second cylinder body 8, the gland 5 and the first cylinder body 7, and the first cylinder body 7 and the second cylinder body 8 are fixedly connected through the second fixing structure 6, and the driving structure 9 for driving is arranged on the second fixing structure 6; the driving structures 9 on the second fixing structures 6 are convenient to drive the second fixing structures 6 to respectively fix the gland 5 and the first cylinder 7, and the first cylinder 7 and the second cylinder 8, so that the mounting and dismounting between the gland 5 and the first cylinder 7, and between the first cylinder 7 and the second cylinder 8 are more convenient and faster, the stress is more uniform and stable, the mounting effect is better, and the driving structure 9 is more labor-saving in driving; namely: firstly, the two clamp frames 62 are symmetrically clamped at the joint of the gland 5 and the first cylinder 7 or the joint of the first cylinder 7 and the second cylinder 8 respectively, then the two slide bars 64 on one clamp frame 62 are clamped with the guide sleeve 63 on the other clamp frame 62, the end parts of the first cylinder 7 and the second cylinder 8 are in a cross shape, so that the slide bars 64 and the guide sleeve 63 are conveniently accommodated in the accommodating groove between the gland 5 and the first cylinder 7 or the accommodating groove between the first cylinder 7 and the second cylinder 8, the structures are more compact, then the allen wrench is clamped with the driving rod 95, the driving rod 95 is rotated, the driving rod 95 drives the gear 94 to rotate counterclockwise, the gear 94 drives the driving wheel 93 to rotate clockwise, the diameter of the driving wheel 93 is greater than that of the gear 94, so that the driving is more labor-saving, the driving wheel 93 is provided with the transmission rod 96 which is rotatably connected, the transmission rod 96 is rotatably connected with the transmission wheel 91, and a crank connecting rod is adopted, so that when the driving wheel 93 rotates, the driving wheel 93 drives the transmission rod 96, the transmission rod 96 drives the transmission wheel 91 to rotate clockwise, the transmission wheel 91 drives the second lead screw 65 to rotate clockwise, so that the slide rod 64 slides towards the direction of the guide sleeve 63, so that the two clamping frames 62 relatively slide and abut against the gland 5 and the first cylinder body 7 or the first cylinder body 7 and the second cylinder body 8, the cross section of the edge of the gland 5 is triangular or trapezoidal, and the cross sections of the edges of the ends of the first cylinder body 7 and the second cylinder body 8 are triangular or trapezoidal, two clamping frames 62 are symmetrically clamped at the joint of the gland 5 and the first cylinder 7, the clamping frame 62 is U-shaped along the plane direction of the gland 5, the clamping frame 62 is U-shaped along the direction vertical to the gland 5, when the clamp frame 62 moves relatively, the clamp frame 62 is pressed against the first cylinder 7 and the gland 5 or the first cylinder 7 and the second cylinder 8, so that the stress between the gland 5 and the first cylinder 7 is more uniform, the stress between the first cylinder 7 and the second cylinder 8 is more uniform, and the driving rod 95 is located on the side wall of the receiving frame 61, and then be convenient for from the side drive actuating lever 95 makes the operation more nimble, and then makes gland 5 with first cylinder body 7 with the installation between the second cylinder body 8 is dismantled more convenient and fast.

Specifically, the first fixing structure 1 includes a fixing frame 11, a pull ring 12, a clamping block 13, a return spring 14, a limiting block 15, a first lead screw 16 and a sealing cover 17, the piston rod 4 is pressed against the fixing frame 11 at one end of the pressing cover 5, the pull ring 12 is fixed at one end of the fixing frame 11 which is pressed against the piston rod 4, one end of the clamping block 13 of the T-shaped structure is slidably connected with the piston rod 4, the other end of the clamping block 13 is clamped with the fixing frame 11, the clamping block 13 penetrates through the return spring 14, two ends of the return spring 14 are respectively pressed against the fixing frame 11 and the clamping block 13, the first lead screw 16 is rotatably connected with the fixing frame 11, the first lead screw 16 is in threaded connection with the limiting block 15, and the limiting block 15 is slidably connected with the fixing frame 11, the limiting block 15 is abutted against the clamping block 13, and the fixing frame 11 is provided with the sealing cover 17 for sealing the first screw rod 16.

Specifically, the guide structure 2 includes an outer sleeve 21, an inner sleeve 22, reinforcing ribs 23 and grooves 24, opposite ends of the outer sleeve 21 and the inner sleeve 22 are respectively fixed to the two fixing frames 11, the reinforcing ribs 23 in a plurality of W shapes are arranged on the inner sleeve 22 in a rectangular array, the inner sleeve 22 is slidably connected with the outer sleeve 21, the reinforcing ribs 23 are slidably connected with the outer sleeve 21, the thickness of the outer sleeve 21 is gradually reduced toward the end of one end of the inner sleeve 22, and the groove 24 is arranged at the end of the inner sleeve 22 away from the reinforcing ribs 23; the gland 5 is provided with the piston rods 4 in sliding connection, and two ends of each of the two piston rods 4 extend into the first cylinder 7 and the second cylinder 8; one end of the piston rod 4, which is far away from the gland 5, is fixed to the first fixing structures 1, and the guide structure 2 for supporting and protecting the piston rod 4 is arranged between the two first fixing structures 1; the setting of guide structure 2 is convenient for protect piston rod 4 effectively prevents piston rod 4 from damaging, makes simultaneously piston rod 4's side direction compressive capacity is stronger, simultaneously piston rod 4 with guide structure 2 passes through 1 fixed connection of first fixed knot constructs, and then makes piston rod 4 with it is more convenient that guide structure 2 is preceding the installation dismantlement, promptly: when the fixing frame 11 is installed, the end of the piston rod 4 is clamped with the fixing frame 11, then the sealing cover 17 is disassembled, an inner hexagonal wrench is used to be clamped with the first lead screw 16, the first lead screw 16 is rotated, the first lead screw 16 drives the limiting block 15 to slide with the fixing frame 11 through threads, so that the limiting block 15 is clamped with the end of the piston rod 4, meanwhile, the limiting block 15 props against the clamping block 13, the clamping block 13 slides with the piston rod 4, so that the clamping block 13 props against the reset spring 14, the clamping block 13 is clamped with the fixing frame 11, further, the clamping block 13 and the limiting block 15 limit the piston rod 4 and the fixing frame 11, further, the installation and the disassembly between the fixing frame 11 and the piston rod 4 are more convenient and rapid, and simultaneously, when the piston rod 4 slides in the first cylinder body 7 and the second cylinder body 8, two the piston rod 4 passes through respectively fixed frame 11 drives overcoat 21 with slide between the endotheca 22, overcoat 21 with the endotheca 22 is effectual protected the piston rod 4 makes the piston rod 4 with it is more stable to slide between the gland 5, makes sealing performance better, simultaneously overcoat 21 with the setting up of endotheca 22 makes the compressive capacity of piston rod 4 is better, the rectangle array is equipped with a plurality of W shapes on the endotheca 22 the stiffening rib 23, further increase stiffening rib 23 with area of contact between the overcoat 21 makes overcoat 21 with stability between the endotheca 22 is better.

Specifically, the dust removing structure 3 includes a chip removing hole 31, two check valves 32, a guiding groove 33 and a sealing ring 34, the sealing ring 34 is disposed at the bottom end of the outer sleeve 21, the guiding groove 33 is disposed inside the sealing ring 34, one end of each of the chip removing holes 31 penetrates through the outer sleeve 21 and extends to the guiding groove 33, the other end of each of the chip removing holes 31 penetrates through one end of the outer sleeve 21 facing the inner sleeve 22, the check valve 32 for air intake is fixed to the outer sleeve 21 and is communicated with an accommodating cavity inside the outer sleeve 21, and the check valve 32 for air exhaust is fixed to the sealing ring 34 and is communicated with the guiding groove 33; guide structure 2's inside is equipped with and is used for removing dust structure 3, and then be convenient for guide structure 2 is right the piston rod 4 protection in-process is to the bits are removed to guide structure 2's junction, and further effectively prevent that the sweeps from getting into guide structure 2's inside, promptly: when the inner sleeve 22 slides towards the outer sleeve 21, the thickness of the end part of the outer sleeve 21 facing one end of the inner sleeve 22 is gradually reduced, so that waste chips on the inner sleeve 22 can be scraped, when the inner sleeve 22 slides towards the outer sleeve 21, the accommodating space between the inner sleeve 22 and the outer sleeve 21 is reduced, the pressure between the outer sleeve 21 and the inner sleeve 22 is increased, air flow is discharged to the diversion groove 33 through the one-way valve 32 on the sealing ring 34 and then blown out from the chip removing hole 31, waste chips are effectively prevented from being accumulated at the connecting part of the outer sleeve 21 and the inner sleeve 22, so that the chip removing capability of the inner sleeve 22 and the outer sleeve 21 is stronger, and when the inner sleeve 22 slides away from the outer sleeve 21, the accommodating cavity between the inner sleeve 22 and the outer sleeve 21 is increased, so that air enters the inner part of the outer sleeve 21 through the one-way valve 32 on the outer sleeve 21, a filter screen or other components for preventing the one-way valve 32 from being blocked are arranged on the outer sleeve 21, so that the one-way valve 32 is prevented from being blocked.

When the device is used, firstly, the two clamp frames 62 are symmetrically clamped at the joint of the gland 5 and the first cylinder 7 or the joint of the first cylinder 7 and the second cylinder 8 respectively, then the two slide bars 64 on one clamp frame 62 are clamped with the guide sleeve 63 on the other clamp frame 62, the end parts of the first cylinder 7 and the second cylinder 8 are in a cross shape, so that the slide bars 64 and the guide sleeve 63 are conveniently accommodated in the accommodating groove between the gland 5 and the first cylinder 7 or the accommodating groove between the first cylinder 7 and the second cylinder 8, the structures are more compact, then the allen wrench is clamped with the driving rod 95, the driving rod 95 is rotated, the driving rod 95 drives the gear 94 to rotate anticlockwise, the gear 94 drives the driving wheel 93 to rotate clockwise, the diameter of the driving wheel 93 is larger than that of the gear 94, so that the driving is more labor-saving, the driving rod 96 which is rotatably connected is arranged on the driving wheel 93, the transmission rod 96 is rotatably connected with the transmission wheel 91, and a crank connecting rod is further adopted, so that when the driving wheel 93 rotates, the transmission rod 96 is driven to rotate through the driving wheel 93, the transmission rod 96 drives the transmission wheel 91 to rotate clockwise, the transmission wheel 91 drives the second lead screw 65 to rotate clockwise, and the slide rod 64 slides towards the direction of the guide sleeve 63, so that the two clamping frames 62 relatively slide and abut against the gland 5 and the first cylinder 7 or the first cylinder 7 and the second cylinder 8, the cross section of the edge of the gland 5 is triangular or trapezoidal, the cross section of the edge of the end part of the first cylinder 7 and the edge of the end part of the second cylinder 8 is triangular or trapezoidal, the two clamping frames 62 are symmetrically clamped at the joint of the gland 5 and the first cylinder 7, the clamping frames 62 are U-shaped along the plane direction of the gland 5, the clamping frames 62 are U-shaped along the direction perpendicular to the gland 5, and when the clamping frames 62 relatively move, the first cylinder 7 and the pressing covers 5 or the first cylinder 7 and the second cylinder 8 are Conflict, so that the stress between the gland 5 and the first cylinder 7 is more uniform, the stress between the first cylinder 7 and the second cylinder 8 is more uniform, and meanwhile, the driving rod 95 is positioned on the side wall of the containing frame 61, so that the driving rod 95 is conveniently driven from the side edge, the operation is more flexible, and the installation and the disassembly between the gland 5 and the first cylinder 7 as well as between the first cylinder 7 and the second cylinder 8 are more convenient and faster; when the fixing frame 11 is installed, the end of the piston rod 4 is clamped with the fixing frame 11, then the sealing cover 17 is disassembled, the first screw rod 16 is clamped with the hexagon socket wrench, the first screw rod 16 is rotated, the first screw rod 16 drives the limiting block 15 to slide with the fixing frame 11 through threads, the limiting block 15 is clamped with the end of the piston rod 4, meanwhile, the limiting block 15 abuts against the clamping block 13, the clamping block 13 slides with the piston rod 4, the clamping block 13 abuts against the reset spring 14, the clamping block 13 is clamped with the fixing frame 11, further, the clamping block 13 and the limiting block 15 limit the piston rod 4 and the fixing frame 11, further, the installation and the disassembly between the fixing frame 11 and the piston rod 4 are more convenient and faster, meanwhile, when the piston rod 4 slides in the first cylinder body 7 and the second cylinder body 8, the two piston rods 4 respectively drive the outer sleeve 21 and the inner sleeve 22 to slide through, the sliding between the piston rod 4 and the gland 5 is more stable, the sealing performance is better, meanwhile, the arrangement of the outer sleeve 21 and the inner sleeve 22 enables the pressure resistance of the piston rod 4 to be better, the rectangular array on the inner sleeve 22 is provided with a plurality of W-shaped reinforcing ribs 23, the contact area between the reinforcing ribs 23 and the outer sleeve 21 is further increased, and the stability between the outer sleeve 21 and the inner sleeve 22 is better; when the inner sleeve 22 slides towards the outer sleeve 21, the thickness of the end part of the outer sleeve 21 facing one end of the inner sleeve 22 is gradually reduced so as to facilitate scraping waste scraps on the inner sleeve 22, when the inner sleeve 22 slides towards the outer sleeve 21, the accommodating space between the inner sleeve 22 and the outer sleeve 21 is reduced, so that the pressure between the outer sleeve 21 and the inner sleeve 22 is increased, the air flow is discharged to the inside of the diversion groove 33 through the one-way valve 32 on the sealing ring 34, then the waste chips are blown out from the chip removing holes 31, the waste chips are effectively prevented from being accumulated at the connecting part of the outer sleeve 21 and the inner sleeve 22, thereby the inner sleeve 22 and the outer sleeve 21 have stronger scrap removing capability, and when the inner sleeve 22 slides away from the outer sleeve 21, the accommodation space between the inner sleeve 22 and the outer sleeve 21 is enlarged, allowing gas to enter the interior of the outer sleeve 21 through the one-way valve 32 on the outer sleeve 21, a filter mesh or other component for preventing the check valve 32 from being clogged is provided on the outer jacket 21 to prevent the check valve 32 from being clogged.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.