CN117381003A - A pneumatic mechanical internal expansion mechanism - Google Patents
A pneumatic mechanical internal expansion mechanism Download PDFInfo
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- CN117381003A CN117381003A CN202311418837.3A CN202311418837A CN117381003A CN 117381003 A CN117381003 A CN 117381003A CN 202311418837 A CN202311418837 A CN 202311418837A CN 117381003 A CN117381003 A CN 117381003A
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- rotating shaft
- expansion sleeve
- shaft
- sleeve
- rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Mechanical Engineering (AREA)
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Abstract
本发明涉及支撑涨轴领域，具体是涉及一种气压机械式内涨机构，包括固定轴、斜面轴和转动轴，转动轴的表面四周均开设有通孔，每个通孔中均设有一个钢球，斜面轴的表面对应钢球的位置处环绕一周开设有与钢球契合的斜面环槽，转动轴的四周对应每个钢球的位置处还均设有一个弧面导热片，转动轴上同轴套设有橡胶涨套，转动轴上环绕设有弹性恢复组件，橡胶涨套朝向固定轴的端部设有同轴限位组件，本发明通过橡胶涨套内撑固定管芯，以及通过同轴限位组件保持管芯与转动轴之间处于同轴状态，使得橡胶涨套被加工时保持稳定，为了恢复橡胶涨套的弹性，通过弹性恢复组件给橡胶涨套提高热量，使得橡胶涨套恢复弹性，提高管芯的加工效果。
The invention relates to the field of supporting expansion shafts, and specifically to a pneumatic mechanical internal expansion mechanism, which includes a fixed shaft, a sloped shaft and a rotating shaft. Through holes are provided around the surface of the rotating shaft, and each through hole is provided with a Steel balls, the surface of the inclined shaft has a beveled annular groove that fits the steel ball and is arranged around the surface corresponding to the position of the steel ball. There is also a cambered heat conductor around the rotating shaft corresponding to the position of each steel ball. The rotating shaft The upper coaxial sleeve is provided with a rubber expansion sleeve, and the rotating shaft is surrounded by an elastic recovery component. The end of the rubber expansion sleeve facing the fixed shaft is provided with a coaxial limiting component. The present invention fixes the tube core through the inner support of the rubber expansion sleeve, and The coaxial limit component is used to keep the tube core and the rotating shaft in a coaxial state, so that the rubber expansion sleeve remains stable when being processed. In order to restore the elasticity of the rubber expansion sleeve, the elastic recovery component is used to increase heat to the rubber expansion sleeve, so that the rubber expansion sleeve is The expansion sleeve restores elasticity and improves the processing effect of the tube core.
Description
Technical Field
The invention relates to the field of supporting expansion shafts, in particular to a pneumatic mechanical internal expansion mechanism.
Background
The prior art principle is that the connecting rod is pushed by air pressure to clamp the tube core, the mechanism adopts a clamping mode of steel mechanical parts, the tube core with too large pressure is easy to crush, crack and the like, the tube core cannot be clamped when the pressure is too small, the tube core wall thickness has great difficulty to debugging, and the tube core wall thickness is unstable and affects too many factors of clamping force.
The disclosed Chinese patent CN219852192U relates to a pneumatic inner support tool, which comprises a shell and an inner support mechanism, wherein the inner support mechanism is arranged on the top surface of the shell, the outer wall of the inner support mechanism is abutted to the inner wall of a machined part, the shell is externally connected with an air pipe, the inner support mechanism comprises a first inner support block and a second inner support block, and the bottom surface of the first inner support block is fixedly connected with a movable inner support cylinder; the movable inner support cylinder is arranged in the movable groove, the movable groove is arranged in the fixed inner support cylinder, the fixed inner support cylinder is communicated with the inside of the shell, the lower end of the fixed inner support cylinder is fixedly connected with the second inner support block, the second inner support block is fixedly connected with the top surface of the shell, the first inner support block and the second inner support block are communicated with the fixed inner support cylinder, the first inner support block and the second inner support block are fixedly connected with movable air pressure mechanisms around, the movable air pressure mechanisms are communicated with the fixed inner support cylinder, and the upper end of the first inner support block is provided with an air release valve.
According to the above patent, the inner wall of the work piece is pressed by the rubber pad, however, in actual use, there may still be a case where the work piece is jogged due to the elastic property of the rubber, because the elasticity of the rubber may cause minute deformation and displacement of the rubber when the work piece is subjected to external force or vibration, thereby jogging the work piece, and thus there is a need for an internal expanding mechanism capable of preventing jogging of the work piece and restoring the elasticity of the rubber.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the pneumatic mechanical internal expanding mechanism, the pipe core is fixed through the internal support of the rubber expanding sleeve, and the coaxial state between the pipe core and the rotating shaft is kept through the coaxial limiting component, so that the rubber expanding sleeve is kept stable when being processed, and in order to restore the elasticity of the rubber expanding sleeve, the elasticity of the rubber expanding sleeve is restored by improving the heat of the rubber expanding sleeve through the elastic restoring component, and the processing effect of the pipe core is improved.
In order to solve the problems in the prior art, the invention provides an air pressure mechanical internal expanding mechanism, which comprises a fixed shaft, an inclined shaft and a rotating shaft, wherein the inclined shaft is coaxially connected with the fixed shaft, the inclined shaft can move relative to the fixed shaft along the axial direction, the rotating shaft is coaxially sleeved on the inclined shaft, the rotating shaft can rotate relative to the inclined shaft around the axis of the rotating shaft, the end part of the rotating shaft is rotationally connected with the end part of the fixed shaft, through holes perpendicular to the axial direction of the rotating shaft are all arranged around the surface of the rotating shaft, a steel ball is arranged in each through hole, an inclined ring groove which is engaged with the steel ball is formed in the position of the surface of the inclined shaft corresponding to the steel ball in a circle, an arc-surface heat conducting sheet which is matched and linked with the inclined shaft for internally supporting a tube core is also arranged at the position of the periphery of the rotating shaft corresponding to each steel ball, a rubber expansion sleeve which is in contact with the inner surface of the arc-surface heat conducting sheet is coaxially sleeved on the rotating shaft, an elastic recovery component which is contacted with the inner surface of the arc-surface heat conducting sheet is also arranged around the rotating shaft, the elastic recovery component which is arranged between the steel ball and the arc-surface heat conducting sheet, the end part of the rubber expansion sleeve facing the fixed shaft is provided with a coaxial limiting component which is used for preventing micro motion, and the coaxial limiting component which is matched and connected between the coaxial limiting component and the rubber expansion sleeve.
Preferably, the elastic recovery assembly is provided with a water sump, the water sump is of a hollow cylindrical structure, sealing rings are connected between two ends of the water sump and the rotating shaft in a threaded mode, a water gap is formed in one end, far away from the fixed shaft, of the water sump, a water channel communicated with the water gap is formed in the rotating shaft, and when the steel ball does not push out the cambered surface heat conducting strip, the inner surface of the cambered surface heat conducting strip is in a state attached to the surface of the water sump.
Preferably, the coaxial spacing subassembly is equipped with the gag lever post, and the gag lever post has four, four gag lever posts evenly distributed around the axis of rotation, and the axis direction of gag lever post is on a parallel with the axis direction of axis of rotation, and the notch that supplies the gag lever post to support has been seted up to the tip of rubber cover that rises, all is equipped with on every gag lever post rather than the link of same activity, and the deep hole of perpendicular to its axis direction and supplying the link activity is seted up on the surface of axis of rotation, and the tip that just is close to the fixed axle in the axis of rotation still is equipped with the retaining member that is used for fixed link.
Preferably, a spiral heating pipe is arranged in the water sump along the axial direction of the water sump and surrounds the inner wall of the water sump.
Preferably, a guide channel coaxial with the through hole is arranged on the water bin at the position corresponding to the steel ball, the inner diameter of the guide channel is equal to the diameter of the steel ball, and an elastic connecting piece positioned in the guide channel is arranged between the steel ball and the cambered surface heat conducting fin.
Preferably, the elastic connecting piece is provided with a first compression spring and a push rod, the middle part of the guide channel is fixedly provided with an annular step, the first compression spring is fixedly connected between the annular step and the cambered surface heat conducting fin, the push rod is inserted into the annular step, the diameter of the push rod is equal to the inner diameter of the annular step, and two ends of the push rod respectively abut against the surface of the steel ball and the surface of the cambered surface heat conducting fin.
Preferably, the end part of the limiting rod, which faces the cambered surface heat conducting fin, is provided with a coaxial inserting rod extending outwards, the end part of the inserting rod extends to a position which is beyond the end part of the cambered surface heat conducting fin and is positioned in the rubber expansion sleeve, the rubber expansion sleeve is provided with a socket for inserting the inserting rod, the surface of the limiting rod is also provided with a patch type pressure sensor, and when the rubber expansion sleeve is in a normal state, the surface of the limiting rod is in a state lower than the surface of the rubber expansion sleeve.
Preferably, the linkage piece is provided with a guide rod and a sliding sleeve, the guide rod is coaxially inserted into the deep hole, the end part of the guide rod is fixedly connected with the surface of the rotating shaft, the diameter of the guide rod is smaller than that of the deep hole, the sliding sleeve is slidably sleeved on the guide post, the outer diameter of the sliding sleeve is equal to that of the deep hole, a second compression spring sleeved on the guide rod is fixedly connected between the sliding sleeve and the rotating shaft, and the locking piece is connected with the sliding sleeve.
Preferably, the locking piece is provided with a jacket, the surface of the sliding sleeve is provided with an annular clamping opening for clamping the jacket, an extending plate is arranged on the jacket towards the direction of the fixed shaft in an extending mode, a columnar electromagnet vertically penetrating through the middle of the extending plate is fixedly arranged on the surface of the rotating shaft, a first lantern ring sleeved on the columnar electromagnet is fixedly arranged on the extending plate at the position corresponding to the columnar electromagnet, and the first lantern ring is made of a magnet material.
Preferably, the fixed surface of axis of rotation is equipped with the pressurization trachea that passes perpendicularly and just is close to fixed axle tip position department, and the fixed second lantern ring of cover on the pressurization trachea that is equipped with in position department that corresponds the pressurization trachea on the extension board, and the second lantern ring is the rubber material, and on the axis of rotation and lie in the pressurization trachea and the deep hole between the intercommunication be equipped with be used for through the pressurization gas port of the air pressure promotion sliding sleeve secondary removal.
Compared with the prior art, the beneficial effects of this application are:
1. according to the invention, the tube core is fixed through the inner support of the rubber expansion sleeve, and the coaxial state between the tube core and the rotating shaft is kept through the coaxial limiting component, so that the rubber expansion sleeve is kept stable when being processed, and after the inner support of the tube core is released along with the rubber expansion sleeve, the elastic recovery component is used for improving the elasticity of the rubber expansion sleeve, and the elastic recovery component is used for recovering the elasticity of the rubber expansion sleeve according to the principle of thermal expansion and contraction, so that the rubber expansion sleeve stably supports the tube core, and the processing effect of the tube core is improved.
2. According to the invention, the cambered heat-conducting sheets are used for conducting heat in the water bin to the rubber expansion sleeve, so that the rubber expansion sleeve can recover normal elasticity after being excessively extruded according to the action of heat expansion and cold contraction, the stability of the rubber expansion sleeve in the internal expansion fixation of the pipe core is realized, the situation that the pipe core slips on the rubber expansion sleeve is avoided, and the service life of the rubber expansion sleeve is prolonged.
3. According to the invention, the four limiting rods move along with the inner expansion state of the rubber expansion sleeve, so that the limiting rods are in contact with the inner wall of the tube core, and the limiting rods only have the limiting effect on the tube core but do not have the inner supporting effect, so that the situation that the tube core is deformed by the rigid support is avoided, the position of the tube core on the rubber expansion sleeve is ensured to be fixed, the limiting on the tube core is realized, the situation that the tube core is jogged on the rubber expansion sleeve is prevented, and the stability of the tube core in the processing process is improved.
Drawings
Fig. 1 is a schematic perspective view of an air pressure mechanical internal expanding mechanism.
Fig. 2 is a partial perspective sectional view of an air pressure mechanical internal expanding mechanism.
Fig. 3 is a plan sectional view of a pneumatic mechanical internal expanding mechanism.
Fig. 4 is an enlarged schematic view at a of fig. 3.
Fig. 5 is an enlarged schematic view at B of fig. 3.
Fig. 6 is a plan cross-sectional view of an elastic restoring assembly and a coaxial spacing assembly of a pneumatic mechanical internal expanding mechanism.
Fig. 7 is a perspective view of the structure at C-C of fig. 6.
Fig. 8 is a perspective view of the structure at D-D of fig. 6.
Fig. 9 is a schematic perspective view of a coaxial limiting assembly of a pneumatic mechanical internal expanding mechanism.
Fig. 10 is an enlarged schematic view at E of fig. 3.
The reference numerals in the figures are: 1-a fixed shaft; 11-guide posts; 111-piston; 112-a return spring; 12-airway; 2-a bevel shaft; 21-inclined plane ring grooves; 3-rotating shaft; 31-through holes; 311-steel ball; 32-a waterway; 33-deep holes; 331-pressurized gas ports; 4-cambered surface heat conducting fins; 5-rubber expansion sleeves; 6-an elastic recovery assembly; 61-water bin; 611-a sealing ring; 612-nozzle; 613-guide channel; 6131-annular steps; 62-spiral heating tube; 63-elastic connection; 631-a first compression spring; 632-ejector rod; 7-a coaxial limiting assembly; 71-a limit rod; 711-insert bar; 712-pressure sensor; 72-linkage; 721-guide bar; 722-sliding sleeve; 7221-annular nip; 723-a second compression spring; 73-locking member; 731-jacket; 7311-extension panel; 732-a columnar electromagnet; 7321-a first collar; 733-pressurized air tube; 7331-a second collar; 8-die.
Detailed Description
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
Referring to fig. 1-6, an air pressure mechanical internal expanding mechanism comprises a fixed shaft 1, an inclined shaft 2 and a rotating shaft 3, wherein the inclined shaft 2 is coaxially connected with the fixed shaft 1, the inclined shaft 2 can move along the axial direction of the inclined shaft 1 relative to the fixed shaft 1, the rotating shaft 3 is coaxially sleeved on the inclined shaft 2, the rotating shaft 3 can rotate around the axial center of the rotating shaft 3 relative to the inclined shaft 2, the end part of the rotating shaft 3 is rotationally connected with the end part of the fixed shaft 1, through holes 31 perpendicular to the axial direction of the rotating shaft are all arranged around the surface of the rotating shaft 3, a steel ball 311 is arranged in each through hole 31, an inclined ring groove 21 which is matched with the steel ball 311 is arranged around the position of the surface of the inclined shaft 2 corresponding to the steel ball 311, an arc surface heat conducting sheet 4 which is matched with the steel ball 311 is also arranged around the position of each steel ball 311, a rubber expansion sleeve 5 which is coaxially sleeved on the rotating shaft 3 and is in contact with the outer surface of the arc surface heat conducting sheet 4, an elastic recovery component 6 which is contacted with the inner surface of the arc surface heat conducting sheet 4 is also arranged around the rotating shaft 3, the elastic recovery component 6 is arranged between the steel ball 311 and the arc surface heat conducting sheet 4, the rubber expansion sleeve 5 is arranged between the steel ball and the end part of the rubber expansion sleeve and the coaxial sleeve 5 and the coaxial sleeve 8 is used for preventing the limit of the coaxial expansion sleeve 7, and the limit component is arranged between the coaxial expansion sleeve and the rubber sleeve and the end part 7 is used for preventing the limiting and the coaxial expansion component 7.
The end part of the fixed shaft 1 facing the inclined shaft 2 is fixedly provided with a guide pillar 11, a piston 111 is sleeved on the guide pillar 11 in a sliding way, a reset spring 112 sleeved on the guide pillar 11 is fixedly connected between the piston 111 and the guide pillar 11, the end part of the piston 111 is contacted with the end part of the inclined shaft 2, and a communicated air passage 12 is formed between the fixed shaft 1 and the guide pillar 11;
when the tube core 8 is sleeved on the rotating shaft 3, the piston 111 is pushed by ventilation through the air passage 12, so that the piston 111 moves towards the direction of the inclined shaft 2, the inclined shaft 2 is pushed to move together, when the inclined shaft 2 moves, the steel ball 311 is pushed by the action of the inclined ring groove 21, so that the steel ball 311 is gradually pushed out of the through hole 31, at the moment, the cambered surface heat conducting sheet 4 is pushed outwards, the cambered surface heat conducting sheet 4 is matched with the steel ball 311 and the rubber expansion sleeve 5, so that the inner supporting tube core 8 is realized, the rubber expansion sleeve 5 is outwards stretched when the cambered surface heat conducting sheet 4 moves outwards, the rubber expansion sleeve 5 is deformed, the inner wall of the tube core 8 is pressed by the rubber expansion sleeve 5, so that the fixing of the tube core 8 is finished, when the rotating shaft 3 rotates, the tube core 8 rotates together, and in the process of processing the tube core 8, due to the elastic property of the rubber expansion sleeve 5, there may still be a situation that the die 8 is jogged, because the elasticity of the rubber expansion sleeve 5 may cause that when the die 8 is subjected to external force or vibration, the rubber expansion sleeve 5 will have tiny deformation and displacement, so that the die 8 is jogged, at this time, the coaxial state between the die 8 and the rotating shaft 3 is kept by the limitation of the coaxial limiting component 7 on the die 8, the die 8 is supported, the situation that the die 8 is jogged is prevented, after the die 8 is processed, the coaxial limiting component 7 releases the supporting state of the die 8, at this time, the air channel 12 leaks, the piston 111 returns to the original position under the action of the return spring 112, the inclined shaft 2 returns to the original position together, the steel ball 311 returns to the through hole 31, the rubber expansion sleeve 5 returns to the normal state, the die 8 can be taken out, if the die 8 is excessively extruded in the rubber expansion sleeve 5, the rubber expansion sleeve 5 is thinned from the original thickness, after the rubber expansion sleeve 5 is cancelled and the inner support is far away from the tube core 8, the rubber expansion sleeve 5 cannot recover the original thickness, so that the elastic effect is lost, at the moment, heat is conducted to the rubber expansion sleeve 5 through the contact of the elastic recovery component 6 and the cambered surface heat conducting sheet 4, the heat energy is provided for the rubber expansion sleeve 5 by heating, the molecular chain of the rubber expansion sleeve 5 is enabled to be movably reinforced, and the molecular chain of the rubber expansion sleeve 5 is rearranged and reorganized due to the action of the heat energy, so that the original elastic state of the rubber expansion sleeve is recovered.
Referring to fig. 2-7, the elastic recovery assembly 6 is provided with a water sump 61, the water sump 61 is in a hollow cylindrical structure, sealing rings 611 are connected between two ends of the water sump 61 and the rotating shaft 3 in a threaded manner, a water gap 612 is formed at one end, far away from the fixed shaft 1, of the water sump 61, a water channel 32 communicated with the water gap 612 is formed on the rotating shaft 3, and when the steel balls 311 do not push out the cambered surface heat conducting fins 4, the inner surface of the cambered surface heat conducting fins 4 is in a state of being attached to the surface of the water sump 61.
When the steel balls 311 do not push out the cambered surface heat conducting strip 4, the inner surface of the cambered surface heat conducting strip 4 is in a state of being closely attached to the surface of the water sump 61, and when heat Shui Shun enters the water sump 61 from the water gap 612, heat in hot water is conducted to the cambered surface heat conducting strip 4, and the cambered surface heat conducting strip 4 is released from the rubber expansion sleeve 5, so that the cambered surface heat conducting strip 4 conducts heat to the rubber expansion sleeve 5, and the rubber expansion sleeve 5 expands and recovers elasticity according to the heat expansion and cold contraction principle.
Referring to fig. 2, 3, 5 and 8, the coaxial limiting assembly 7 is provided with four limiting rods 71, linkage members 72 and locking members 73, the limiting rods 71 are uniformly distributed around the rotating shaft 3, the axial direction of each limiting rod 71 is parallel to the axial direction of the rotating shaft 3, the end part of the rubber expansion sleeve 5 is provided with a notch for supporting the limiting rod 71, each linkage member 72 is provided with four, one linkage member 72 is connected with one limiting rod 71, the surface of the rotating shaft 3 is provided with four deep holes 33 perpendicular to the axial direction of the corresponding linkage member 72 and for the corresponding linkage member 72 to move, and each locking member 73 is connected with one linkage member 72 in a matched manner.
Through the combination of gag lever post 71, linkage piece 72 and retaining member 73, can realize the spacing to tube core 8, along with rubber cover 5 that rises is propped the back that rises, gag lever post 71 follows rubber cover 5 and outwards moves together, until rubber cover 5 supports the die 8 inner wall and presses the back to appointed degree, the surface of gag lever post 71 and the contact of tube core 8 inner wall, linkage piece 72 and gag lever post 71 together move, along with the position determination of gag lever post 71 after, through retaining member 73 fixed linkage piece 72, indirect fixed gag lever post 71, restriction gag lever post 71 removes, thereby under four gag lever posts 71 to the spacing of tube core 8, the condition that the die 8 has prevented the die 8 from taking place the fine motion on rubber cover 5.
Referring to fig. 2, 3 and 6, a spiral heating pipe 62 is provided in the sump 61 along its axial direction around the inner wall of the sump 61.
Through the heating effect of spiral heating pipe 62, the liquid or medium in water storehouse 61 can reach required temperature to control rubber cover 5 degree of being heated, ensure that rubber cover 5 is retrieved in required temperature range, thereby guarantees its recovery effect.
Referring to fig. 2, 3, 4 and 7, a guide channel 613 coaxial with the through hole 31 is provided on the water bin 61 at a position corresponding to the steel ball, the inner diameter of the guide channel 613 is equal to the diameter of the steel ball 311, and an elastic connecting piece 63 located in the guide channel 613 is provided between the steel ball 311 and the cambered surface heat conducting plate 4.
The guide channel 613 on the water bin 61 is a channel coaxial with the through hole 31, the inner diameter of the guide channel 613 is equal to the diameter of the steel ball 311, so that the steel ball 311 can freely roll and position along the guide channel 613, an elastic connecting piece 63 is arranged between the steel ball 311 and the cambered surface heat conducting strip 4, the elastic connecting piece 63 is used for connecting and fixing the steel ball 311 and the cambered surface heat conducting strip 4, when the steel ball is pushed to move outwards by the inclined shaft 2, the steel ball can push the cambered surface heat conducting strip 4 to move outwards by the elastic connecting piece 63, and when the steel ball moves inwards, the cambered surface heat conducting strip 4 can return to the original position by the elastic connecting piece 63, so that the deformation condition of the rubber expansion sleeve 5 is controlled.
Referring to fig. 3, 4, 6 and 7, the elastic connector 63 is provided with a first compression spring 631 and a push rod 632, the middle part of the guide channel 613 is fixedly provided with an annular step 6131, the first compression spring 631 is fixedly connected between the annular step 6131 and the cambered surface heat conducting plate 4, the push rod 632 is inserted into the annular step 6131, the diameter of the push rod 632 is equal to the inner diameter of the annular step 6131, and two ends of the push rod 632 respectively abut against the surface of the steel ball 311 and the surface of the cambered surface heat conducting plate 4.
When the steel balls are ejected, the steel balls indirectly eject the cambered surface heat conducting plate 4 through the ejector rod 632, the cambered surface heat conducting plate 4 is in contact with one quarter of the area of the rubber expansion sleeve 5, the contact area between the rubber expansion sleeve 5 and the inner wall of the tube core 8 is increased, the first compression spring 631 is changed into a stretching state from a normal state after the cambered surface heat conducting plate 4 is ejected, the first compression spring 631 is restored to a normal state after the steel balls return, the steel balls are pulled to the cambered surface heat conducting plate 4 to return at the moment, the rubber expansion sleeve 5 is also restored to a normal state, and the internal expansion state of the rubber expansion sleeve 5 is effectively controlled.
Referring to fig. 3, 5, 8, 9 and 10, the end of the limiting rod 71 facing the cambered surface heat conducting strip 4 is provided with a coaxial outwardly extending inserting rod 711, the end of the inserting rod 711 extends to a position beyond the end of the cambered surface heat conducting strip 4 and located in the rubber expansion sleeve 5, the rubber expansion sleeve 5 is provided with a socket for inserting the inserting rod 711, the surface of the limiting rod 71 is also provided with a patch type pressure sensor 712, and when the rubber expansion sleeve 5 is in a normal state, the surface of the limiting rod 71 is in a state lower than the surface of the rubber expansion sleeve 5.
When the rubber expansion sleeve 5 is in a normal state, the surface of the limiting rod 71 is positioned at a position lower than the surface of the rubber expansion sleeve 5, and when the rubber expansion sleeve 5 is internally expanded to support the tube core 8, the limiting rod 71 moves along with the internal expansion state of the rubber expansion sleeve 5, and in order to avoid the condition that the connection part of the end part of the rubber expansion sleeve 5 and the rubber rod is bent when the cambered surface heat conducting sheet 4 pushes the rubber expansion sleeve 5, the limiting rod 71 is supported between the rubber expansion sleeve 5 and the limiting rod 71 through the inserting rod 711, so that the limiting rod 71 and the rubber expansion sleeve 5 have supporting force, the stable movement of the limiting rod 71 can be driven in the internal expansion process of the rubber expansion sleeve 5, the inner wall of the tube core 8 is gradually compressed until the pressure sensor 712 on the limiting rod 71 is pressed to a specified degree, the rubber expansion sleeve 5 is controlled to stop the internal expansion, and the limiting rod 71 is in a state of being in contact with the inner wall of the tube core 8, and the condition that the tube core 8 is jogged is prevented through the contact of the four limiting rods 71 and the tube core 8.
Referring to fig. 3, 8, 9 and 10, the linkage member 72 is provided with a guide rod 721 and a sliding sleeve 722, the guide rod 721 is coaxially inserted into the deep hole 33, the end of the guide rod 721 is fixedly connected with the surface of the rotating shaft 3, the diameter of the guide rod 721 is smaller than that of the deep hole 33, the sliding sleeve 722 is slidably sleeved on the guide rod, the outer diameter of the sliding sleeve 722 is equal to that of the deep hole 33, a second compression spring 723 sleeved on the guide rod 721 is fixedly connected between the sliding sleeve 722 and the rotating shaft 3, and the locking member 73 is connected with the sliding sleeve 722.
When the limiting rod 71 moves, the limiting rod 71 drives the sliding sleeve 722 to move together, the sliding sleeve 722 slides on the guide rod 721, the second compression spring 723 is in a stretched state along with the outward movement of the limiting rod 71, the second compression spring 723 returns to a normal state along with the return of the rubber expansion sleeve 5 to the normal state, the limiting rod 71 returns to an original position, the fixation of the tube core 8 is released, and the movement of the limiting rod 71 is effectively controlled.
Referring to fig. 3, 8, 9 and 10, the locking member 73 is provided with a jacket 731 and a columnar electromagnet 732, the surface of the sliding sleeve 722 is provided with an annular clamping opening 7221, the jacket 731 is clamped in the annular clamping opening 7221 on the sliding sleeve 722, an extension plate 7311 is arranged on the side edge of the jacket 731 in an extending manner towards the direction of the fixed shaft 1, the columnar electromagnet 732 is fixedly arranged on the rotating shaft 3, the end part of the columnar electromagnet 732 vertically penetrates through the middle part of the extension plate 7311 to extend outwards, a first collar 7321 sleeved on the columnar electromagnet 732 is fixedly arranged on the extension plate 7311 at a position corresponding to the columnar electromagnet 732, and the first collar 7321 is made of a magnet material.
After the limiting rod 71 contacts with the inner wall of the tube core 8 and the rubber expansion sleeve 5 fixes the tube core 8, the columnar electromagnet 732 is electrified, and the magnetic poles of the columnar electromagnet 732 are adjusted to be opposite to the first lantern ring 7321 according to the principle of like poles repel and opposite poles attract, so that the first lantern ring 7321 is adsorbed on the columnar electromagnet 732, the extension plate 7311 is fixed, and the sliding sleeve 722 is fixed, so that the stable contact between the limiting rod 71 and the inner wall of the tube core 8 is ensured, and the micro motion of the tube core 8 is effectively prevented.
Referring to fig. 10, a pressurizing air pipe 733 vertically passing through an extension plate 7311 and close to the end of the fixed shaft 1 is fixedly arranged on the surface of the rotating shaft 3, a second collar 7331 sleeved on the pressurizing air pipe 733 is fixedly arranged on the extension plate 7311 at a position corresponding to the pressurizing air pipe 733, the second collar 7331 is made of rubber, and a pressurizing air port 331 for pushing the sliding sleeve 722 to move secondarily by air pressure is communicated between the pressurizing air pipe 733 and the deep hole 33 on the rotating shaft 3.
When the pipe core 8 in the rubber expansion sleeve 5 reaches a proper degree and the limiting rod 71 does not reach a state of being in contact with the inner wall of the pipe core 8 at the moment, the pressurizing air pipe 733 is used for inflating the pipe core, the pressurizing air pipe 331 is used for inflating the deep hole 33, the sleeve ring can be pushed outwards along with continuous pressurizing until the limiting rod 71 is in contact with the inner wall of the pipe core 8, the limiting rod 71 is guaranteed to effectively limit the pipe core 8, and the situation that the pipe core 8 is jogged under the condition that the supporting pressure of the rubber expansion sleeve 5 to the inner wall of the pipe core 8 is small is prevented.
According to the invention, the tube core 8 is fixed by the inner support of the rubber expansion sleeve 5, and the coaxial state between the tube core 8 and the rotating shaft 3 is kept by the coaxial limiting component 7, so that the rubber expansion sleeve 5 is kept stable when being processed, and after the inner support of the tube core 8 is released along with the rubber expansion sleeve 5, in order to recover the elasticity of the rubber expansion sleeve 5, the heat is increased for the rubber expansion sleeve 5 by the elastic recovery component 6, the rubber expansion sleeve 5 recovers the elasticity according to the principle of thermal expansion and cold contraction, and the processing effect of the tube core 8 is improved.
The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (10)
Priority Applications (1)
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| CN202311418837.3A CN117381003B (en) | 2023-10-30 | 2023-10-30 | A pneumatic mechanical internal expansion mechanism |
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| CN202311418837.3A CN117381003B (en) | 2023-10-30 | 2023-10-30 | A pneumatic mechanical internal expansion mechanism |
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| CN117381003A true CN117381003A (en) | 2024-01-12 |
| CN117381003B CN117381003B (en) | 2026-03-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120885769A (en) * | 2025-09-15 | 2025-11-04 | 同创(天津)新材料有限公司 | A CNC machine tool for cutting metal parts |
| CN121402670A (en) * | 2025-12-25 | 2026-01-27 | 无锡欣润包装机械科技有限公司 | An expansion mandrel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU872049A1 (en) * | 1979-12-07 | 1981-10-15 | Минский Филиал Государственного Проектно-Технологического И Экспериментального Института "Оргстанкинпром" | Workpiece centring device |
| CN104014833A (en) * | 2014-06-13 | 2014-09-03 | 沈阳飞机工业（集团）有限公司 | Thin-wall round sleeve centered expanded clamp |
| CN204504275U (en) * | 2015-03-17 | 2015-07-29 | 浙江来福谐波传动股份有限公司 | Swollen dabber clamp in a kind of self-centering |
| CN109396907A (en) * | 2018-11-05 | 2019-03-01 | 刘剑 | Hydraulic expansion device |
| CN214349703U (en) * | 2020-10-26 | 2021-10-08 | 无锡合力叉车制造有限公司 | An inflatable mandrel |
-
2023
- 2023-10-30 CN CN202311418837.3A patent/CN117381003B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU872049A1 (en) * | 1979-12-07 | 1981-10-15 | Минский Филиал Государственного Проектно-Технологического И Экспериментального Института "Оргстанкинпром" | Workpiece centring device |
| CN104014833A (en) * | 2014-06-13 | 2014-09-03 | 沈阳飞机工业（集团）有限公司 | Thin-wall round sleeve centered expanded clamp |
| CN204504275U (en) * | 2015-03-17 | 2015-07-29 | 浙江来福谐波传动股份有限公司 | Swollen dabber clamp in a kind of self-centering |
| CN109396907A (en) * | 2018-11-05 | 2019-03-01 | 刘剑 | Hydraulic expansion device |
| CN214349703U (en) * | 2020-10-26 | 2021-10-08 | 无锡合力叉车制造有限公司 | An inflatable mandrel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120885769A (en) * | 2025-09-15 | 2025-11-04 | 同创(天津)新材料有限公司 | A CNC machine tool for cutting metal parts |
| CN121402670A (en) * | 2025-12-25 | 2026-01-27 | 无锡欣润包装机械科技有限公司 | An expansion mandrel |
| CN121402670B (en) * | 2025-12-25 | 2026-03-31 | 无锡欣润包装机械科技有限公司 | Expansion mandrel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117381003B (en) | 2026-03-31 |
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