阅读说明：本技术 一种液压可调胀紧连接套及装配方法 (Hydraulic adjustable expansion connecting sleeve and assembling method ) 是由 李宏亮 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种液压可调胀紧连接套及装配方法,包括：胀套壳体、以及与胀套壳体可拆卸连接的压力调节组件；胀套壳体包括依次连接的第一胀紧段、连接段、第二胀紧段,第一胀紧段和第二胀紧段均设有内侧环形油腔、外侧环形油腔、以及连接内侧环形油腔和外侧环形油腔的连接孔,胀套壳体的侧壁设有依次贯穿第一胀紧段、连接段以及第二胀紧段的油路,油路与连接孔连通,且油路的两端分别形成注油排气孔,注油排气孔上设置有密封塞。当向一侧注油排气孔注入润滑油脂时,润滑油脂通过油路和连接孔进一步注入到内、外侧环形油腔中,另一侧注油排气孔用于排气。通过压力调节组件使液压可调,从而避免对工件造成损坏。(The invention discloses a hydraulic adjustable expansion connecting sleeve and an assembling method, wherein the hydraulic adjustable expansion connecting sleeve comprises: the expansion sleeve comprises an expansion sleeve shell and a pressure adjusting assembly detachably connected with the expansion sleeve shell; the expansion sleeve shell comprises a first expansion section, a connecting section and a second expansion section which are connected in sequence, wherein the first expansion section and the second expansion section are respectively provided with an inner annular oil cavity, an outer annular oil cavity and a connecting hole for connecting the inner annular oil cavity and the outer annular oil cavity, the side wall of the expansion sleeve shell is provided with an oil way which sequentially runs through the first expansion section, the connecting section and the second expansion section, the oil way is communicated with the connecting hole, oil injection exhaust holes are formed in two ends of the oil way respectively, and a sealing plug is arranged on the oil injection exhaust holes. When lubricating grease is injected into the oil injection and exhaust hole on one side, the lubricating grease is further injected into the annular oil cavities on the inner side and the outer side through the oil way and the connecting hole, and the oil injection and exhaust hole on the other side is used for exhausting. The hydraulic pressure is adjustable through the pressure adjusting assembly, so that damage to the workpiece is avoided.)

1. The utility model provides an adjustable tight adapter sleeve that expands of hydraulic pressure which characterized in that includes: the expansion sleeve comprises an expansion sleeve shell (1) and a pressure adjusting assembly (2) detachably connected with the expansion sleeve shell (1);

the expansion sleeve shell (1) comprises a first expansion section (101), a connecting section (102) and a second expansion section (103) which are connected in sequence, wherein the first expansion section (101) and the second expansion section (103) are respectively provided with an inner annular oil cavity (104), an outer annular oil cavity (105) and a connecting hole (106) for connecting the inner annular oil cavity (104) and the outer annular oil cavity (105), the side wall of the expansion sleeve shell (1) is provided with an oil path (107) which sequentially penetrates through the first expansion section (101), the connecting section (102) and the second expansion section (103), the oil path (107) is communicated with the connecting hole (106), two ends of the oil path (107) are respectively provided with an oil injection vent hole (108), and a sealing plug (110) is arranged on the oil injection vent hole (108);

the outer side wall of the connecting section (102) is provided with a through hole (109) communicated with the oil way (107), and the pressure adjusting assembly (2) is arranged in the through hole (109).

2. The hydraulically adjustable expansion joint sleeve as claimed in claim 1, characterized in that the inner annular oil chamber (104) is provided on a side close to the inner wall of the first expansion section (101) and the second expansion section (103), respectively, the outer annular oil chamber (105) is provided on a side close to the outer wall of the first expansion section (101) and the second expansion section (103), respectively, and the inner annular oil chamber (104) is provided concentrically with the outer annular oil chamber (105) and coaxially with the expansion joint housing (1), respectively.

3. The hydraulically adjustable expansion connecting sleeve as claimed in claim 2, characterized in that the pressure adjusting assembly (2) comprises a piston (3) and an adjusting member (4) for adjusting the piston (3), the adjusting member (4) is movably connected with the end of the piston (3), a boss (111) is arranged on the connecting section (102), the adjusting member (4) is detachably connected with the boss (111), and one end of the piston (3) far away from the adjusting member (4) extends into the through hole (109).

4. The hydraulically adjustable expansion joint sleeve as claimed in claim 3, characterized in that the pressure regulating assembly (2) further comprises a plug (5), the plug (5) extending through the regulating member (4) and being movably connected to the piston (3).

5. The hydraulically adjustable expansion joint sleeve as claimed in claim 4, characterized in that the piston (3) is provided with an outer annular groove (302), and the plug pin (5) penetrates through the adjusting member (4) and is movably connected with the outer annular groove (302) of the piston (3).

6. The hydraulically adjustable expansion joint sleeve as claimed in claim 3, characterized in that a sealing ring (301) is arranged between the outer wall of the piston (3) and the inner wall of the through-hole (109).

7. The hydraulically adjustable expansion joint sleeve as claimed in claim 3, characterized in that a steel ball (401) is arranged between the end of the piston (3) and the inner wall of the end of the adjusting part (4).

8. The hydraulically adjustable expansion joint sleeve as claimed in claim 1, characterized in that the pressure regulating assembly (2) is provided in plurality and is evenly distributed on the expansion joint housing (1).

9. A method for assembling a hydraulic adjustable expansion joint sleeve according to any one of claims 4 to 8, which comprises the following steps:

s1: the hydraulic adjustable expansion connecting sleeve is connected with a workpiece, and the method comprises the following specific steps:

s11: the piston (3) is connected with the adjusting part (4) through the bolt (5), then one end of the piston (3) is arranged in a through hole (109) on the expansion sleeve shell (1), and lubricating grease is injected into an oil path (107) through the oil injection and exhaust hole (108);

s12: screwing the adjusting piece (4), driving the piston (3) to exit from the through hole (109) through the bolt (5), and continuously injecting lubricating grease into the oil injection exhaust hole (108) until the lubricating grease fills the whole cavity;

s13: a sealing plug (110) is arranged on the oil injection vent hole (108), and then the adjusting piece (4) is screwed, so that hydraulic pressure is formed inside the first expansion section (101) and the second expansion section (103);

s14: the expansion connecting sleeve is arranged in a workpiece, the adjusting piece (4) is screwed until the expansion connecting sleeve and the workpiece form interference fit, and then 3% -5% of adjusting force is added for adjustment and fixation;

s2: the hydraulic adjustable expansion connecting sleeve is detached from the workpiece.

10. The assembling method of the hydraulic adjustable expansion connecting sleeve according to claim 9, wherein in step S2, the concrete steps of disassembling the hydraulic adjustable expansion connecting sleeve and the workpiece are as follows: and screwing the adjusting piece (4) to enable the piston (3) to exit from the through hole (109) until the first expansion section (101) and the second expansion section (103) form clearance fit with the workpiece.

Technical Field

The invention relates to the technical field of clamping tools for universal parts of mechanical workpieces, in particular to a hydraulic adjustable expansion connecting sleeve and an assembling method.

Background

An expansion connecting sleeve, an expansion sleeve for short, is an advanced basic component commonly used for mechanical connection under heavy load, and in the connection of a wheel and a shaft, the expansion connecting sleeve is a keyless connection device which realizes load transmission by tightening a high-strength bolt to ensure the pressure and the friction force generated between containing surfaces. When the current expansion sleeve and a workpiece product are used, a transition fit or clearance fit connection mode is basically adopted, so that the precision in production and processing is reduced, and the defect when the expansion sleeve is used for a high-precision product is large; when a transmission product is used, a key connection is also used, so that the abrasion to a shaft is large, the dynamic balance influence is large, and the workpiece is damaged.

Disclosure of Invention

The invention aims to provide a hydraulic adjustable expansion connecting sleeve and an assembling method thereof, and aims to solve the problem that the existing expansion sleeve is large in abrasion to a shaft when being connected with a workpiece, so that the workpiece is damaged.

The technical scheme for solving the technical problems is as follows:

a hydraulically adjustable expansion joint sleeve, comprising: the expansion sleeve comprises an expansion sleeve shell and a pressure adjusting assembly detachably connected with the expansion sleeve shell;

the expansion sleeve shell comprises a first expansion section, a connecting section and a second expansion section which are connected in sequence, wherein the first expansion section and the second expansion section are respectively provided with an inner annular oil cavity, an outer annular oil cavity and a connecting hole for connecting the inner annular oil cavity and the outer annular oil cavity;

the lateral wall of linkage segment is equipped with the through-hole with the oil circuit intercommunication, and pressure adjustment assembly sets up in the through-hole.

The beneficial effects of adopting the above technical scheme are: through set up the pressure adjustment subassembly on the cover casing expands, when the staff injects lubricating grease into it through the oiling exhaust vent of oil circuit one side in the cover casing expands, the oil circuit runs through first tight section that expands in proper order, linkage segment and the tight section of second expansion, and oil circuit and connecting hole intercommunication, lubricating grease injects into in inboard annular oil pocket and the outside annular oil pocket through the connecting hole, and further inject into the through-hole through the oil circuit, then through the inside air discharge of opposite side oiling exhaust vent with the air in inboard annular oil pocket and the outside annular oil pocket, install the sealing plug on the oiling exhaust vent and carry out the shutoff this moment, and adjust the pressure adjustment subassembly, make first tight section that expands, the tight section inside hydraulic pressure that forms of second expansion. Can dismantle with the cover casing that expands through pressure adjusting part and be connected, can adjust hydraulic size through pressure adjusting part, make first bloated tight section and the bloated tight section of second expand and reduce under the hydraulic pressure effect, when the cover casing that expands be connected the back with the work piece, through adjusting pressure adjusting part, make bloated tight adapter sleeve and work piece interference fit, and pressure adjustable mode can not the counter shaft produce wearing and tearing to avoided causing the damage to the work piece, it is more reliable to use.

Further, the inner annular oil cavity is respectively arranged on one side, close to the inner wall, of the first expansion section and the second expansion section, the outer annular oil cavity is respectively arranged on one side, close to the outer wall, of the first expansion section and the second expansion section, and the inner annular oil cavity and the outer annular oil cavity are concentrically arranged and are respectively and coaxially arranged with the expansion sleeve shell.

The beneficial effects of adopting the above technical scheme are: through the arrangement mode of the inner annular oil cavity and the outer annular oil cavity, the inner annular oil cavity and the outer annular oil cavity drive the first expansion section and the second expansion section to expand and contract equally under the action of the pressure adjusting assembly, and the inner annular oil cavity and the outer annular oil cavity are coaxially arranged with the expansion sleeve shell, so that the expansion connecting sleeve can be smoothly connected with a workpiece, and the reliability of the structure is improved.

Further, the pressure regulating assembly includes the piston and is used for adjusting the regulating part of piston, the tip swing joint of regulating part and piston is provided with the boss on the linkage segment, and the regulating part can be dismantled with the boss and be connected, and the piston is kept away from the one end of regulating part and is stretched into to the inside of through-hole.

The beneficial effects of adopting the above technical scheme are: through setting up piston and regulating part for the position of adjusting the piston in the through-hole on the expansion sleeve casing, when pouring into lubricating grease to one side oiling exhaust hole, lubricating grease pours into in inboard annular oil pocket and the outside annular oil pocket through the oil circuit, and discharge the inside air of inboard annular oil pocket and outside annular oil pocket and the inside air of oil circuit through opposite side oiling exhaust hole, install the sealing plug on the oiling exhaust hole, through the position in the through-hole of regulating piston, make first section of expanding, the inside hydraulic pressure that forms of the second section of expanding. Through set up the boss on the linkage segment, the regulating part can be dismantled with the boss and be connected, conveniently twists the regulating part to adjust hydraulic pressure's size, thereby make the cover casing that expands go up first tight section of expanding and the tight section of second expanding expand and reduce, make the inside hydraulic pressure of the cover casing that expands adjustable, more convenient and practical, through the mode of dismantling the connection, make things convenient for regulating part adjusting position, make the structure more reliable. The piston stretches into the inside of through-hole, makes things convenient for follow-up regulation, makes the piston form closely to cooperate with the linkage segment on the cover casing that expands simultaneously, when avoiding follow-up injection lubricating grease, the condition of pressure release appears, influences follow-up use.

Further, the pressure regulating assembly further comprises a plug pin, and the plug pin penetrates through the regulating piece and is movably connected with the piston.

The beneficial effects of adopting the above technical scheme are: the plug pin is used for positioning the piston, the adjusting piece is connected with the piston into a whole, the fixing is firmer, the position of the piston can be adjusted in a linkage mode when the adjusting piece is screwed, the structure is more reliable, and the use is more convenient.

Furthermore, an outer annular groove is formed in the piston, and the plug pin penetrates through the adjusting piece and is movably connected with the outer annular groove in the piston.

The beneficial effects of adopting the above technical scheme are: through setting up outer annular groove, when the bolt of packing into, make things convenient for the bolt location and fix, the operation is more convenient, makes the structure more reliable, convenient dismantlement and installation.

Further, a sealing ring is arranged between the outer wall of the piston and the inner wall of the through hole.

The beneficial effects of adopting the above technical scheme are: through setting up the sealing washer for guarantee that the piston is in encapsulated situation with the gap that the through-hole is connected on the cover casing that expands, avoid the condition that pressure release and oil leak appear after adding lubricating grease.

Further, a steel ball is arranged between the end part of the piston and the inner wall of the end part of the adjusting piece.

The beneficial effects of adopting the above technical scheme are: through setting up the steel ball, avoid adjusting part and the dead condition of card to appear in piston tip junction, be convenient for the installation and the dismantlement of adjusting part and piston.

Further, the pressure regulating assembly is provided with a plurality of, and evenly distributed on the cover shell that expands.

The beneficial effects of adopting the above technical scheme are: through setting up a plurality of pressure adjustment subassemblies, and evenly distributed on the cover casing expands, when pouring into lubricating grease to the oiling exhaust hole on the cover casing that expands, the position of adjusting pressure adjustment subassembly simultaneously makes the inside hydraulic pressure that forms of cover casing that expands, and it is more even to make pressure distribution through evenly setting up pressure adjustment subassembly.

The invention also provides an assembly method of the hydraulic adjustable expansion connecting sleeve, which comprises the following steps:

s1: the hydraulic adjustable expansion connecting sleeve is connected with a workpiece, and the method comprises the following specific steps:

s11: connecting the piston with the adjusting piece through a plug pin, then installing one end of the piston in the through hole on the expansion sleeve shell, and injecting lubricating grease into the oil path through the oil injection exhaust hole;

s12: screwing the adjusting piece, driving the piston to exit the through hole through the plug pin, and continuously injecting lubricating grease into the oil injection exhaust hole until the lubricating oil cavity fills the whole cavity;

s13: installing a sealing plug on the oil injection exhaust hole, and screwing the adjusting piece to enable the interiors of the first expansion section and the second expansion section to form hydraulic pressure;

s14: the expansion connecting sleeve is arranged in a workpiece, the adjusting piece is screwed until the expansion connecting sleeve and the workpiece form interference fit, and then 3% -5% of adjusting force is added for adjustment and fixation;

s2: the hydraulic adjustable expansion connecting sleeve is detached from the workpiece.

The beneficial effects of adopting the above technical scheme are: the pressure adjusting assembly and the expansion sleeve shell are installed through the step S11, lubricating grease is injected into the inner annular oil cavity and the outer annular oil cavity on the first expansion section and the second expansion section, the step S12 enables the inner annular oil cavity, the outer annular oil cavity and the oil path to be filled with the lubricating grease, the step S13 is used for adjusting and confirming the deformation amount of the first expansion section and the second expansion section on the expansion connecting sleeve in advance, the workpiece is prevented from being damaged when the installation is carried out due to overlarge adjusting force of a worker, the expansion connecting sleeve is connected with the workpiece through the deformation amount determined in the step S13 in the step S14, the expansion connecting sleeve and the workpiece form interference fit through increasing the adjusting force, the fixation is firmer, and the workpiece cannot be influenced.

Further, in step S2, the specific steps of detaching the hydraulic adjustable expansion connecting sleeve from the workpiece are as follows: and screwing the adjusting piece to enable the piston to exit the through hole until the first expansion section and the second expansion section form clearance fit with the workpiece.

The beneficial effects of adopting the above technical scheme are: when the expansion connecting sleeve needs to be disassembled, the adjusting piece is screwed to adjust the position of the piston inside the through hole on the expansion sleeve shell, so that the piston is withdrawn from the inside of the through hole, the hydraulic pressure inside the inner annular oil cavity, the outer annular oil cavity and the oil way is released, the first expansion section and the second expansion section are reset, a gap is formed between the first expansion section and the second expansion section and the workpiece, clearance fit is formed, the disassembly is convenient, the shaft cannot be abraded, and the workpiece is prevented from being damaged.

Compared with the prior art, the invention has the following beneficial effects:

when lubricating grease is injected into an oil injection exhaust hole on one side of an expansion sleeve shell by a worker, the lubricating grease is further injected into a connecting hole through an oil way, is injected into an inner annular oil cavity and an outer annular oil cavity through the connecting hole, is further injected into a through hole through the oil way, exhausts air inside the inner annular oil cavity and the outer annular oil cavity through an oil injection exhaust hole on the other side, and forms hydraulic pressure inside a first expansion section and a second expansion section on the expansion sleeve shell through a pressure adjusting assembly. Can dismantle with the cover casing that expands through the regulating part and be connected, piston and regulating part swing joint through twisting the regulating part, adjust the position in the through-hole on the linkage segment of piston in the cover casing that expands to adjust hydraulic pressure's size, make first bloated tight section and the bloated tight section of second expand and reduce. When the expansion sleeve is connected with a workpiece, the expansion sleeve is in interference fit with the workpiece by adjusting the pressure adjusting assembly, and the shaft cannot be abraded by the pressure adjustable mode, so that the workpiece is prevented from being damaged, and the expansion sleeve is more reliable to use.

Drawings

FIG. 1 is a schematic view of the overall structure of a hydraulic adjustable expansion connecting sleeve;

FIG. 2 is a schematic structural view (sectional view) of a hydraulic adjustable expansion connecting sleeve;

FIG. 3 is a schematic view of a specific structure of an expansion sleeve shell;

fig. 4 is a schematic diagram of a specific structure of the pressure regulating assembly.

The reference numerals shown in fig. 1 to 4 are respectively expressed as: 1-expansion sleeve shell, 101-first expansion section, 102-connecting section, 103-second expansion section, 104-inner annular oil cavity, 105-outer annular oil cavity, 106-connecting hole, 107-oil way, 108-oil injection and exhaust hole, 109-through hole, 110-sealing plug, 111-boss, 2-pressure adjusting component, 3-piston, 301-sealing ring, 302-outer annular groove, 4-adjusting component, 401-steel ball and 5-plug pin.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Example 1

As shown in fig. 1-3, a hydraulic adjustable expansion joint sleeve includes: the expansion sleeve comprises an expansion sleeve shell 1 and a pressure adjusting assembly 2 detachably connected with the expansion sleeve shell 1; the expansion sleeve shell 1 is an expansion connecting sleeve shell commonly used for connecting a wheel and a shaft in the existing machinery. The pressure adjusting assembly 2 is adjusted to adjust the hydraulic pressure inside the expansion sleeve shell 1.

The expansion sleeve shell 1 comprises a first expansion section 101, a connecting section 102 and a second expansion section 103 which are connected in sequence, wherein the first expansion section 101 and the second expansion section 103 are respectively provided with an inner annular oil cavity 104, an outer annular oil cavity 105 and a connecting hole 106 for connecting the inner annular oil cavity 104 and the outer annular oil cavity 105, the side wall of the expansion sleeve shell 1 is provided with an oil way 107 which sequentially runs through the first expansion section 101, the connecting section 102 and the second expansion section 103, the oil way 107 is communicated with the connecting hole 106, two ends of the oil way 107 are respectively provided with an oil injection vent hole 108, and a sealing plug 110 is arranged on the oil injection vent hole 108. An oil passage 107 penetrates through the first expansion section 101, the connecting section 102 and the second expansion section 103, the oil passage 107 is communicated with the connecting hole 106, the oil passage 107 is communicated with the inner annular oil chamber 104 and the outer annular oil chamber 105, and a lubricating oil chamber passage is formed inside the expansion sleeve housing 1 through the oil passage 107, the inner annular oil chamber 104, the outer annular oil chamber 105 and the connecting hole 106. The plurality of oil injection exhaust holes 108 are provided, and when a worker injects lubricating grease into one of the oil injection exhaust holes 108, the other oil injection exhaust holes 108 are used for exhausting. The sealing plug 110 is used for plugging the oil injection vent hole 108 when necessary, so that hydraulic pressure is formed in the expansion connecting sleeve, and the situations of oil leakage and pressure relief are avoided.

The outer side wall of the connection section 102 is provided with a through hole 109 communicating with the oil passage 107, and the pressure adjusting assembly 2 is disposed in the through hole 109. The through hole 109 is communicated with the oil path 107, and the through hole 109 is combined with the pressure adjusting assembly 2 to be used for adjusting the hydraulic pressure inside the first expansion section 101 and the second expansion section 103 on the expansion sleeve shell 1.

By arranging the pressure adjusting assembly 2 on the expansion sleeve shell 1, when a worker injects lubricating grease into the expansion sleeve shell 1 through the oil injection and exhaust hole 108 on one side of the oil path 107, the oil path 107 is communicated with the connecting hole 106, the lubricating grease is injected into the inner annular oil chamber 104 and the outer annular oil chamber 105 through the connecting hole 106 and is further injected into the through hole 109 through the oil path 107, then air in the inner annular oil chamber 104 and the outer annular oil chamber 105 and air in the oil path 107 are exhausted through the oil injection and exhaust hole 108 on the other side, at the moment, the sealing plug 110 is arranged on the oil injection and exhaust hole 108 to plug, and the pressure adjusting assembly 2 is adjusted, so that hydraulic pressure is formed in the first expansion section 101 and the second expansion section 103. Can dismantle with the cover casing that expands through pressure adjusting part 2 and be connected, can adjust hydraulic size through pressure adjusting part 2, make first bloated tight section 101 and the bloated tight section 103 of second and enlarge and reduce under the hydraulic pressure effect, after the cover casing that expands 1 is connected with the work piece, through adjusting pressure adjusting part 2, make bloated tight adapter sleeve and work piece interference fit, and pressure adjustable mode can not the counter shaft produce wearing and tearing, thereby avoided causing the damage to the work piece, it is more reliable to use.

As shown in fig. 1, in the hydraulic adjustable expansion connecting sleeve of the present invention: the inner annular oil chamber 104 is respectively arranged at one side close to the inner walls of the first expansion section 101 and the second expansion section 103, the outer annular oil chamber 105 is respectively arranged at one side close to the outer walls of the first expansion section 101 and the second expansion section 103, and the inner annular oil chamber 104 and the outer annular oil chamber 105 are concentrically arranged and are respectively coaxially arranged with the expansion sleeve shell 1. Through the arrangement mode of the inner annular oil cavity 104 and the outer annular oil cavity 105, the inner annular oil cavity 104 and the outer annular oil cavity 105 drive the first expansion section 101 and the second expansion section 103 to expand and contract equally under the action of the pressure adjusting assembly 2, and are coaxially arranged with the expansion sleeve shell 1, so that the expansion connecting sleeve can be smoothly connected with a workpiece, and the reliability of the structure is improved.

As shown in fig. 2-4, in the hydraulic adjustable expansion connecting sleeve of the invention: pressure adjusting assembly 2 includes piston 3 and is used for adjusting piston 3's regulating part 4, regulating part 4 and piston 3's tip swing joint, is provided with boss 111 on the linkage segment 102, and regulating part 4 can dismantle with boss 111 and be connected, and piston 3 keeps away from the inside that the one end of regulating part 4 stretched into to through-hole 109. The number of the bosses 111 is matched with that of the adjusting pieces 4, and the bosses 111 are uniformly distributed on the expansion sleeve shell 1. The movable connection mode can be realized by arranging a clamping groove at the connecting part of the adjusting piece 4 and the end part of the piston 3; the end part of the piston 3 is provided with an external thread, and the inner wall of the part where the adjusting piece 4 is connected with the piston 3 is provided with an internal thread matched with the external thread at the end part of the piston 3, so that the threaded connection is realized, and the movable connection mode is realized. Adjusting part 4 is the adjusting nut of U type, and its inner wall is provided with the internal thread, and the position department of being connected with adjusting part 4 on boss 111 is provided with 4 interior screw-thread fit's of adjusting part external screw thread, realizes threaded connection's mode to realize adjusting part 4 and can dismantle, when twisting adjusting part 4, can drive piston 3 and remove, thereby convenient regulation and operation. By providing the piston 3 and the adjusting member 4, the position of the piston 3 in the through hole 109 is adjusted. When a worker injects lubricating grease into the oil injection and exhaust hole 108, the lubricating grease is injected into the connecting hole 106 through the oil passage 107, injected into the inner annular oil chamber 104 and the outer annular oil chamber 105 through the connecting hole 106, and exhausts the air inside the inner annular oil chamber 104 and the outer annular oil chamber 105 and the air inside the oil passage 107 through the other oil injection and exhaust holes 108 which are not filled with oil, and a sealing plug 110 is mounted on the oil injection and exhaust hole 108 to cause hydraulic pressure to be formed inside the first expansion section 101 and the second expansion section 103. The hydraulic pressure in the inner annular oil cavity 104 and the outer annular oil cavity 105 is increased or reduced by adjusting the position of the piston 3, so that the first expansion section 101 and the second expansion section 103 expand and contract under the action of hydraulic pressure, the mode of adjusting the pressure is realized, and the piston is more convenient and practical.

As shown in fig. 3, in the hydraulic adjustable expansion connecting sleeve of the present invention: the pressure regulating assembly 2 further comprises a plug pin 5, and the plug pin 5 penetrates through the regulating part 4 and is movably connected with the piston 3. The outer wall of the bolt 5 is provided with an external thread, the position of the piston 3 connected with the bolt 5 is provided with a hole, and the inner wall of the hole is provided with an internal thread matched with the external thread of the bolt 5, so that the mode of threaded connection is realized, and movable connection is realized. The movable connection mode can be realized by arranging a clamping groove matched with the outer diameter of the bolt 5 at the connecting part of the piston 3 and the bolt 5. The plug pin 5 is used for positioning and fixing the piston 3, so that the adjusting piece 4 and the piston 3 are connected into a whole, the fixing is firmer, the position of the piston 3 in the through hole 109 in the expansion sleeve shell 1 can be adjusted in a linkage mode when the adjusting piece 4 is screwed, and the structure is more reliable.

Preferably, the piston 3 is provided with an outer annular groove 302, and the plug pin 5 penetrates through the adjusting member 4 and is movably connected with the outer annular groove 302. Through set up the hole that matches with the 5 external diameters of bolt on outer ring channel 302, the outer wall of bolt 5 is provided with the external screw thread, and the inner wall of hole is provided with the internal thread with 5 external screw thread fit of bolt, has realized swing joint's mode. The outer annular groove 302 is arranged to facilitate the positioning and fixing of the bolt 5, so that the structure is more reliable.

Preferably, a sealing ring 301 is provided between the outer wall of the piston 3 and the inner wall of the through hole 109. Through setting up sealing washer 301 for guarantee that the piston 3 is in encapsulated situation with the gap that the through-hole 109 on the linkage segment 102 is connected in the cover casing 1 expands, avoid appearing the condition of oil leak when pouring into lubricating grease, simultaneously through pouring into lubricating grease into oiling exhaust hole 108, make first tight section 101 and the second of expanding tight section 103 inside production hydraulic pressure through adjusting pressure adjusting assembly 2, through setting up sealing washer 301, the condition of pressure release has also been avoided.

Preferably, a steel ball 401 is arranged between the end of the piston 3 and the inner wall of the end of the adjusting member 4. Through setting up steel ball 401, avoid adjusting part 4 and the dead condition of card to appear in 3 end connection departments of piston, be convenient for adjusting part 4's installation and dismantlement.

Preferably, the pressure regulating assembly 2 is provided in plurality and is evenly distributed on the expansion shell 1. Through setting up a plurality of pressure adjustment subassembly 2, and evenly distributed on the cover casing 1 that expands, when ascending oiling exhaust hole 108 pours into lubricating grease into, twist pressure adjustment subassembly 2 simultaneously, make the first tight section 101 that expands on the cover casing 1 that expands and the inside hydraulic pressure that forms of the tight section 103 that expands of second, through evenly setting up pressure adjustment subassembly 2, make pressure distribution more even.

As shown in fig. 1 to 4, the present invention further provides an assembling method of a hydraulic adjustable expansion joint sleeve, comprising the following steps:

s1: the hydraulic adjustable expansion connecting sleeve is connected with a workpiece, and the method comprises the following specific steps:

s11: the piston 3 is connected with the adjusting part 4 through the bolt 5, then one end of the piston 3 is arranged in a through hole 109 on the expansion sleeve shell 1, and lubricating grease is injected into the oil path 107 through the oil injection and exhaust hole 108;

s12: screwing the adjusting piece 4, driving the piston 3 to exit from the through hole 109 through the bolt 5, and continuously injecting lubricating grease into the oil injection exhaust hole 108 until the lubricating grease fills the whole cavity;

s13: a sealing plug 110 is arranged on the oil injection vent hole 108, and then the adjusting piece 4 is screwed, so that hydraulic pressure is formed inside the first expansion section 101 and the second expansion section 103;

s14: the expansion connecting sleeve is arranged in a workpiece, the adjusting piece 4 is screwed until the expansion connecting sleeve and the workpiece form interference fit, and then 3% -5% of adjusting force is added for adjustment and fixation;

s2: the concrete steps of dismantling the hydraulic adjustable expansion connecting sleeve and the workpiece are as follows:

the adjusting piece 4 is screwed to enable the piston 3 to exit the through hole 109 until the first expansion section 101 and the second expansion section 103 form clearance fit with the workpiece.

The worker mounts the pressure adjustment assembly 2 with the expansion sleeve housing 1 through step S1 while filling the oil filling and discharging holes 108 on the oil passage 107 in the expansion sleeve housing 1 with lubricating grease and discharging air from other oil filling and discharging holes 108 that are not filled with oil. Step S2 is for filling the inside annular oil chamber 104, the outside annular oil chamber 105, and the oil passage 107 with lubricating grease. Step S3 is to continuously inject lubricating grease into the oil injection vent hole 108, the oil path 107 is communicated with the connecting hole 106, the connecting hole 106 is communicated with the inner annular oil chamber 104 and the outer annular oil chamber 105, the oil path 107 is communicated with the through hole 109, and lubricating grease is further injected into the through hole 109, at this time, air inside the inner annular oil chamber 104, the outer annular oil chamber 105 and the oil path 107 is exhausted, a worker seals the oil injection vent hole 108 with the sealing plug 110, thereby avoiding the situations of pressure relief and oil leakage, and the first expansion section 101 and the second expansion section 103 on the expansion sleeve housing 1 form hydraulic pressure by adjusting the pressure adjusting assembly 2. The staff adopts the moment spanner to twist regulating part 4, regulating part 4 adjusts the position of piston 3 in through-hole 109, make inside annular oil pocket 104 of inboard and the inside hydraulic pressure of outside annular oil pocket 105 grow and diminish, and make first bloated tight section 101 and the bloated tight section 103 of second expand and reduce under the hydraulic effect, adopt the moment spanner to twist regulating part 4, make first bloated tight section 101 and the bloated tight section 103 of second expand to a certain degree, the moment spanner can record its moment value, it is standby with moment value record, mainly used for preadjust and confirm the deflection of first bloated tight section 101 and the bloated tight section 103 of second on the bloated cover casing 1, prevent that the staff from adjusting the too big damage that leads to the fact the work piece when the installation. The expansion connecting sleeve is connected with the workpiece, the expansion connecting sleeve is connected with the workpiece by increasing the torque value of the torque wrench, and when the pressure adjusting component 2 is adjusted to the position of the deformation, the torque value is increased by 3% -5% for adjustment and fixation, so that interference fit is formed between the expansion connecting sleeve and the workpiece, and fixation is firmer.

When the expansion connecting sleeve needs to be detached from a workpiece, the adjusting piece 4 is screwed to enable the piston 3 to exit from the through hole 109, so that hydraulic pressure inside the inner annular oil cavity 104, the outer annular oil cavity 105 and the oil way 107 is released, the first expansion section 101 and the second expansion section 103 are reset, gaps are generated between the first expansion section 101 and the second expansion section 103 and the workpiece, clearance fit is formed, detachment is convenient, abrasion to the shaft is avoided, and damage to the workpiece is avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.