CN116696922A - Combined shaft and cutting part with same - Google Patents

Combined shaft and cutting part with same Download PDF

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Publication number
CN116696922A
CN116696922A CN202310694442.XA CN202310694442A CN116696922A CN 116696922 A CN116696922 A CN 116696922A CN 202310694442 A CN202310694442 A CN 202310694442A CN 116696922 A CN116696922 A CN 116696922A
Authority
CN
China
Prior art keywords
shaft
hole
section
shaft body
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310694442.XA
Other languages
Chinese (zh)
Inventor
李巍
李树森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalai Nur Coal Industry Co Ltd
Original Assignee
Dalai Nur Coal Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dalai Nur Coal Industry Co Ltd filed Critical Dalai Nur Coal Industry Co Ltd
Priority to CN202310694442.XA priority Critical patent/CN116696922A/en
Publication of CN116696922A publication Critical patent/CN116696922A/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
    • E21C25/10—Rods; Drums
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
    • E21C25/08—Mountings for the rods or drums
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Ocean & Marine Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The invention discloses a combined shaft and a cutting part with the same, wherein the combined shaft comprises a shaft body, a sleeve body and a first connecting piece, at least one end of the shaft body is provided with a conical surface section, the inner cavity of the sleeve body is provided with a conical hole section, the conical hole section is the same as the conical degree of the conical surface section, the conical surface section of the shaft body is arranged in the conical hole section, and the first connecting piece is arranged between the shaft body and the sleeve body and is used for connecting the shaft body and the sleeve body and driving the sleeve body to move on the shaft body along the axial direction of the shaft body so as to enlarge the outer diameter size of the sleeve body. The combined shaft disclosed by the invention can change the assembly mode between the combined shaft and the shell, and reduce the abrasion degree between the combined shaft and the shell of the cutting part.

Description

Combined shaft and cutting part with same
Technical Field
The invention belongs to the technical field of coal mining equipment, and particularly relates to a combined shaft and a cutting part with the combined shaft.
Background
The underground fully-mechanized coal mining working face of the coal mine is used for cutting a coal seam by using a rotary coal cutter roller, the running environment is severe, the stress is high, and mechanical abrasion of parts in a transmission part can be caused, wherein the abrasion of an idler shaft to a cutting part shell is included.
In the related art, the idler shaft and the shell are assembled through the sealing part and the stop part for preventing the idler shaft from displacing, and in the operation process, the load transmitted to the idler shaft still causes larger abrasion between the idler shaft and the wall of the shell of the cutting part.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a combined shaft, which can change the assembly mode between the combined shaft and the shell and reduce the abrasion degree between the combined shaft and the shell of the cutting part.
The embodiment of the invention also provides a cutting part.
The combined shaft of the embodiment of the invention comprises:
the shaft body is provided with a conical surface section at least one end;
the sleeve body is provided with a taper hole section in the inner cavity, the taper hole section has the same taper as the taper of the taper hole section, and the taper hole section of the shaft body is arranged in the taper hole section;
the first connecting piece is arranged between the shaft body and the sleeve body and is used for connecting the shaft body and the sleeve body and driving the sleeve body to move on the shaft body along the axial direction of the shaft body so as to enlarge the outer diameter of the sleeve body.
The combined shaft provided by the embodiment of the invention can change the assembly mode between the combined shaft and the shell, further realize tight fit with the shell during assembly, and reduce the abrasion degree between the combined shaft and the shell of the cutting part.
In some embodiments, an end plate is arranged at one end of the sleeve body far away from the shaft body, a first through hole is arranged on the end plate, a first threaded hole is arranged at the end part of the conical surface section, an external threaded section is arranged on the first connecting piece, the external threaded section of the first connecting piece penetrates through the first through hole to be connected into the first threaded hole, a blocking head is arranged at the end part of the first connecting piece far away from the first threaded hole, and the blocking head is propped against the end plate.
In some embodiments, the first connecting pieces are multiple, the end plate is provided with a plurality of first through holes in a circumference manner, the end part of the conical surface section is provided with a plurality of first threaded holes, the first through holes and the first threaded holes are in one-to-one correspondence, and the first connecting pieces are arranged in the corresponding first through holes and the first threaded holes.
In some embodiments, the sleeve further comprises a second connecting piece, an external thread section is arranged on the second connecting piece, a second threaded hole is arranged on the end plate, the external thread section of the second connecting piece is connected in the second threaded hole, and after the first connecting piece is separated from the first threaded hole, the second connecting piece is propped against the shaft body by rotating the second connecting piece so as to separate the sleeve body from the shaft body.
In some embodiments, the sleeve further comprises a deformation section for elastically deforming when the sleeve is propped against the tapered section.
In some embodiments, the deformation section is an annular groove formed in the inner cavity of the sleeve body, the annular groove is coaxial with the taper hole section, and the annular groove is located at one end with a small inner diameter size of two axial ends of the taper hole section.
A cutting portion, comprising:
the shell is provided with a first assembly hole and a second assembly hole, and the first assembly hole and the second assembly hole are coaxial;
as for the combined shaft, two ends of the combined shaft are respectively assembled in the first assembly hole and the second assembly hole.
According to the cutting part disclosed by the embodiment of the invention, the sleeve body is supported by the conical surface section of the shaft body, so that the outer diameter size of the sleeve body is changed, and then the sleeve body is tightly matched with the shell during assembly, the application of the stop part and the sealing part is reduced, the bonding area between the combined shaft and the shell is increased, and the abrasion degree between the combined shaft and the shell of the cutting part is reduced.
In some embodiments, the two ends of the shaft body are respectively provided with a conical surface section, the first assembly hole and the second assembly hole are respectively through holes, and the two ends of the shaft body are respectively assembled in the corresponding assembly holes through the sleeve body and the first connecting piece.
In some embodiments, one end of the shaft body has a conical surface section, the first assembly hole is a blind hole, the second assembly hole is a through hole, the end of the shaft body having the conical surface section is assembled in the second assembly hole through the sleeve body and the first connecting piece, and the other end of the shaft body is assembled in the first assembly hole.
In some embodiments, the gear is mounted on the shaft by a bearing.
Drawings
Fig. 1 is a schematic structural view of a combination shaft according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a combination shaft according to another embodiment of the present invention.
Fig. 3 is a schematic structural view of a combination shaft according to still another embodiment of the present invention.
Fig. 4 is a schematic view of the structure of a cutting part according to an embodiment of the present invention.
Fig. 5 is an enlarged view of a mounting structure of a combination shaft according to an embodiment of the present invention.
Fig. 6 is a schematic view of a cutting portion according to another embodiment of the present invention.
Fig. 7 is an enlarged view of the mounting hole in the cutting portion of one embodiment of the present invention.
Reference numerals:
a combined shaft 1;
the shaft body 11, the conical surface section 111, the first threaded hole 112, the sleeve body 12, the conical hole section 121, the deformation section 122, the end plate 123, the first through hole 124, the second threaded hole 125, the first connecting piece 13 and the second connecting piece 14;
a housing 2;
a first assembly hole 21, a second assembly hole 22, and a gear 23.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1 to 3, a combined shaft 1 according to an embodiment of the present invention includes a shaft body 11, a sleeve body 12 and a first connecting member 13, at least one end of the shaft body 11 having a tapered section 111; the inner cavity of the sleeve body 12 is provided with a taper hole section 121, the taper degree of the taper hole section 121 is the same as that of the taper surface section 111, and the taper surface section 111 of the shaft body 11 is arranged in the taper hole section 121; the first connecting piece 13 is disposed between the shaft body 11 and the sleeve body 12, and is used for connecting the shaft body 11 and the sleeve body 12 and driving the sleeve body 12 to move on the shaft body 11 along the axial direction of the shaft body 11 so as to enlarge the outer diameter size of the sleeve body 12.
It can be understood that after the conical surface section 111 of the shaft body 11 is assembled into the conical hole section 121, the outer wall surface of the conical surface section 111 is attached to the inner wall surface of the conical hole section 121, at this time, a certain distance remains between the end of the conical surface section 111 and the sleeve body 12, and when the force is applied to the sleeve body 12 and the shaft body 11 by the first connecting piece 13, the conical surface section 111 can still move further in the conical hole section 121 of the sleeve body 12 along the axial direction of the shaft body 11, so that the outer diameter size of the sleeve body 12 becomes larger under the propping action of the conical surface section 111.
Since the combination shaft 1 is axially positioned by increasing the outer diameter of the sleeve body 12, it is unnecessary to cut a key groove for fitting the stopper member in the vicinity of the fitting hole of the housing 2 during processing of the housing 2 for manufacturing the cut portion, so that the fitting of the combination shaft 1 with the fitting hole tends to be better.
According to the combined shaft 1 provided by the embodiment of the invention, the assembly mode between the combined shaft 1 and the machine shell 2 can be changed, a sealing ring and a stop component are not adopted any more, the use of the sealing ring or the stop component is reduced, the assembly between the shaft body 11 and the machine shell 2 is realized through the tight fit between the sleeve body 12 and the machine shell 2 during the assembly, the contact area between the sleeve body 12 and the machine shell 2 is increased due to the reduction of the slotted hole structure for assembling the sealing ring and the stop component, the stability is improved, the running of the combined shaft 1 under the action of the load of the combined shaft 1 is avoided, and the abrasion degree between the combined shaft 1 and the machine shell 2 of the cutting part is reduced.
In some embodiments, an end plate 123 is disposed at an end of the sleeve body 12 away from the shaft body 11, a first through hole 124 is disposed on the end plate 123, a first threaded hole 112 is disposed at an end of the conical surface section 111, an external threaded section is disposed on the first connecting piece 13, the external threaded section of the first connecting piece 13 passes through the first through hole 124 to be connected in the first threaded hole 112, and a blocking head is disposed at an end of the first connecting piece 13 away from the first threaded hole 112 and is propped against the end plate 123.
In order to apply a force to the sleeve body 12 and the shaft body 11 through the first connecting piece 13, an end plate 123 is arranged at one end of the sleeve body 12 far away from the shaft body 11, a first through hole 124 is arranged on the end plate 123, so that the first connecting piece 13 is connected with the first threaded hole 112 at the end part of the conical surface section 111 after passing through the first through hole 124, along with the rotation of the first connecting piece 13, the blocking head at the end part of the first connecting piece 13 is propped against the end plate 123, a force along the axial direction of the shaft body 11 and towards the shaft body 11 is applied to the sleeve body 12, the conical surface section 111 is driven to move towards one end with smaller section size of the conical hole section 121, and the outer diameter size of the sleeve body 12 is enlarged, so that the assembly of the combined shaft 1 and the casing 2 is completed, as shown in fig. 4 and 5, and fig. 5 is an enlarged structure schematic diagram of the part A in fig. 4.
Since the tapered section 111 of the shaft body 11 and the tapered hole section 121 of the sleeve body 12 are attached, the tapered section 111 still needs to be moved toward the end with smaller cross-sectional dimension of the tapered hole section 121 under the action of the first connecting piece 13, a gap is formed between the end of the tapered section 111 of the shaft body 11 and the end plate 123, so as to avoid interference of the end plate 123 on the movement of the sleeve body 12 relative to the shaft body 11 in the axial direction of the shaft body 11. The minimum distance of the gap between the end of the tapered section 111 and the end plate 123 may be determined according to the taper of the tapered section 111 and the tapered hole section 121 so as to expand the outer diameter of the sleeve 12 to a set size value within the effective distance of the gap.
Alternatively, as shown in fig. 1 and 2, the first connecting member 13 may be a bolt, and the blocking head is a nut at the end of the bolt.
As shown in fig. 1 and 2, in some embodiments, the first connecting pieces 13 are multiple, the end plate 123 is circumferentially provided with a plurality of first through holes 124, the end of the conical surface section 111 is provided with a plurality of first threaded holes 112, the first through holes 124 and the first threaded holes 112 are in one-to-one correspondence, and the corresponding first through holes 124 and the first threaded holes 112 are respectively provided with the first connecting pieces 13.
When a force is applied between the shaft body 11 and the sleeve body 12 through the first connecting piece 13, in order to enable the shaft body 11 and the sleeve body 12 to move along the axial direction of the shaft body 11 and avoid the situation that the shaft body 11 and the sleeve body 12 are out of alignment due to lateral deviation in the relative movement process, in the embodiment of the invention, a plurality of first through holes 124 are arranged on the end plate 123, a plurality of first threaded holes 112 are arranged at the end part of the conical surface section 111, and the first through holes 124 and the first threaded holes 112 are all arranged in a circumferential form, so that the coaxiality between the shaft body 11 and the sleeve body 12 is adjusted through rotation of the plurality of first connecting pieces 13 when assembling.
In assembly, two first connecting pieces 13 which are oppositely arranged are generally used as a group for adjustment, so that the stress balance between the sleeve body 12 and the shaft body 11 is ensured, the stress balance between the sleeve body 12 and the shaft body 11 can be realized through a plurality of groups of first connecting pieces 13, and the assembly effect of the combined shaft 1 and the machine shell 2 is improved.
Optionally, the first through holes 124 on the end plate 123 and the first threaded holes 112 on the end of the conical surface section 111 are uniformly spaced around the circumference.
The taper hole section 121 of the sleeve body 12 is propped between the taper section 111 and the hole wall of the assembly hole of the shell 2 through the fastening of the plurality of first connecting pieces 13, so that interference fit is formed between the combined shaft 1 and the assembly hole, and the interference fit can be continuously maintained through the daily maintenance fastening of the plurality of first connecting pieces 13, so that the combined shaft 1 does not wear the shell 2 under the condition, the maintenance period of the cutting part can be prolonged correspondingly, and the economic benefit is improved.
As shown in fig. 1 and 2, in some embodiments, the sleeve body 12 is separated from the shaft body 11 by rotating the second connecting member 14 to support the second connecting member 14 against the shaft body 11 after the first connecting member 13 is separated from the first threaded hole 112, and further includes a second connecting member 14, wherein an external threaded section is provided on the second connecting member 14, a second threaded hole 125 is provided on the end plate 123, and the external threaded section of the second connecting member 14 is connected in the second threaded hole 125.
When the combined shaft 1 needs to be maintained or repaired, the combined shaft 1 needs to be detached from the casing 2, so the second threaded hole 125 is provided on the end plate 123, the second connecting piece 14 is provided in the second threaded hole 125, and when the combined shaft is detached, the first connecting piece 13 connected between the shaft body 11 and the sleeve body 12 is detached, the end part of the second connecting piece 14 is propped against the end part of the shaft body 11 by rotating the second connecting piece 14, and the sleeve body 12 can be separated from the shaft body 11 along with the continued rotation of the second connecting piece 14.
Optionally, due to the limited thickness of the end plate 123, in order to make the threaded fit between the second connecting piece 14 and the second threaded hole 125 of the end cover long enough to withstand the reaction force of the pushing force of the disassembly sleeve 12, a boss is provided on the end plate 123, and the boss and the end plate 123 are in an integrally formed structure, and the second threaded hole 125 penetrates the boss.
Optionally, the second connecting piece 14 is a jackscrew, and in the non-overhauling state, the plug is connected in the second threaded hole 125, and when overhauling is needed, the plug is removed to connect the jackscrew in the second threaded hole 125, and the sleeve body 12 is separated from the shaft body 11 by driving the jackscrew.
As shown in fig. 1 and 2, in some embodiments, the sleeve 12 further includes a deformation section 122, the deformation section 122 being configured to elastically deform when the sleeve 12 is propped against the tapered section 111.
The sleeve body 12 can be made of a metal material with good elastic deformation, the sleeve body 12 is propped by the conical surface section 111, local area stress concentration exists in the deformation process, and in order to improve the uniformity of the overall change of the outer diameter dimension of the sleeve body 12, the deformation section 122 is arranged in the sleeve body 12 to solve the problem of corresponding stress concentration, and the outer diameter dimension deformation consistency of the contact surface section of the sleeve body 12 and the shell 2 is good.
Optionally, the sleeve 12 is made of copper.
In some embodiments, the deformation section 122 is an annular groove formed in the inner cavity of the sleeve body 12, the annular groove is coaxial with the taper hole section 121, and the annular groove is located at one end with a small inner diameter size of two axial ends of the taper hole section 121.
That is, the sleeve 12 is affected by the end plate 123, the end plate 123 affects the overall deformation of the sleeve 12, resulting in poor uniformity of the outer diameter dimension of the sleeve 12, and by providing the deformation section 122 as an annular groove and providing the annular groove at one end of the taper section 121 having a small inner diameter dimension in the axial direction, the influence of the end plate 123 on the deformation of the outer diameter dimension of the sleeve 12 is reduced, and the assembly effect between the sleeve 12 and the casing 2 is improved.
As shown in fig. 4 and 5, a cutting part comprises a casing 2 and the combined shaft 1, wherein a first assembly hole 21 and a second assembly hole 22 are arranged on the casing 2, the first assembly hole 21 and the second assembly hole 22 are coaxial, and two ends of the combined shaft 1 are respectively assembled in the first assembly hole 21 and the second assembly hole 22.
According to the cutting part provided by the embodiment of the invention, the sleeve body 12 is enlarged through the conical surface section 111 of the shaft body 11, so that the outer diameter size of the sleeve body 12 is changed, and then the sleeve body is tightly matched with the shell 2 during assembly, the application of a stop part and a sealing part is reduced, the bonding area between the combined shaft 1 and the shell 2 is increased, and the abrasion degree between the combined shaft 1 and the shell 2 of the cutting part is reduced.
After the two ends of the combined shaft 1 are respectively aligned and placed in the first assembly hole 21 and the second assembly hole 22, by adjusting the first connecting piece 13, the taper hole section 121 of the sleeve body 12 is attached to the taper hole section 111 of the shaft body 11, and along with the continuous rotation of the first connecting piece 13, the taper hole section 111 can prop up the taper hole section 121 of the sleeve body 12, so that the outer diameter of the sleeve body 12 is enlarged and fixed in the corresponding first assembly hole 21 or second assembly hole 22, and the fixation of the combined shaft 1 is completed.
In some embodiments, the two ends of the shaft body 11 are provided with conical surface sections 111, the first assembly hole 21 and the second assembly hole 22 are through holes, and the two ends of the shaft body 11 are assembled in the corresponding assembly holes through the sleeve body 12 and the first connecting piece 13. That is, the first and second fitting holes 21 and 22 are through holes, and both ends of the combination shaft 1 may be fixedly fitted in combination with the sleeve body 12.
As shown in fig. 6 and 7, fig. 7 is an enlarged structural schematic view of the portion B in fig. 6, in some embodiments, one end of the shaft body 11 has a tapered section 111, the first fitting hole 21 is a blind hole, the second fitting hole 22 is a through hole, the end of the shaft body 11 having the tapered section 111 is fitted in the second fitting hole 22 through the sleeve body 12 and the first connecting member 13, and the other end of the shaft body 11 is fitted in the first fitting hole 21. That is, the first assembly hole 21 is a blind hole, and during assembly, one end of the shaft body 11 is not required to be matched with the sleeve body 12, and only needs to be directly assembled in the first assembly hole 21, the second assembly hole 22 is a through hole, and the other end of the shaft body 11 is matched with the sleeve body 12 so as to be assembled in the second assembly hole 22.
The setting of blind hole has avoided the risk that lubricating oil leaked on the one hand and has utilized the structural feature of blind hole self just can carry out spacingly to the tip of the axle body 11.
In some embodiments, further comprising a gear 23, the gear 23 is bearing-mounted on the shaft 11. The load that gear 23 received is transmitted to axis body 11 through the bearing, because the assembly structure is stable between axis body 11 and the casing 2, reduces the oil leak probability, also prevents axis body 11 axial displacement, has prolonged the maintenance cycle of cutting part.
The assembly steps of the gear 23 and the combined shaft 1 are: two sets of bearings are arranged in holes of the gear 23, the gear 23 is inserted into the position of the second assembly hole 22 from a large hole end of the shell 2, the bearings are coaxial with the second assembly hole 22, the shaft body 11 is inserted into the second assembly hole 22 and is pressed into a designated position, then the sleeve body 12 is arranged, the first connecting pieces 13 are screwed in, the first connecting pieces 13 are sequentially fastened by a spanner, the sleeve body 12 is knocked by a large hammer, under the strong acting force generated by the first connecting pieces 13, the sleeve body 12 moves towards the middle part close to the shaft body 11, the outer diameter size of the sleeve body is enlarged, and the taper hole section 121 of the sleeve body 12 is propped between the taper hole section 111 and the hole wall of the second assembly hole 22, so that the axial positioning and sealing of the combined shaft 1 are realized.
The combined shaft 1 of the embodiment of the invention can effectively prevent the axial movement of the shaft body 11, and cancel the stop component for stopping the outward movement of the shaft body 11, but can stop the outward movement of the shaft body 11 by virtue of the friction resistance formed by the expansion of the taper hole sleeve, and can lead the operation effect of the cutting part to be better. The interference fit of the combined shaft 1 and the shell 2 can also reduce the oil leakage probability, the taper hole section 121 of the sleeve body 12 is assembled between the taper surface section 111 of the shaft body 11 and the hole wall of the assembly hole in an interference mode, and gaps do not exist among the matched pieces, so that no external leakage channel exists in hydraulic oil, and the oil leakage probability between the combined shaft 1 and the hole wall of the assembly hole can be effectively reduced.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (10)

1. A composite shaft, comprising:
the shaft body is provided with a conical surface section at least one end;
the sleeve body is provided with a taper hole section in the inner cavity, the taper hole section has the same taper as the taper of the taper hole section, and the taper hole section of the shaft body is arranged in the taper hole section;
the first connecting piece is arranged between the shaft body and the sleeve body and is used for connecting the shaft body and the sleeve body and driving the sleeve body to move on the shaft body along the axial direction of the shaft body so as to enlarge the outer diameter of the sleeve body.
2. The combined shaft according to claim 1, wherein an end plate is arranged at one end, far away from the shaft body, of the sleeve body, a first through hole is formed in the end plate, a first threaded hole is formed in the end portion of the conical surface section, an external thread section is arranged on the first connecting piece, the external thread section of the first connecting piece penetrates through the first through hole to be connected into the first threaded hole, a blocking head is arranged at the end, far away from the first threaded hole, of the first connecting piece, and the blocking head abuts against the end plate.
3. The combination shaft according to claim 2, wherein the number of the first connecting pieces is plural, the end plate is provided with a plurality of first through holes in a circumference manner, the end part of the conical surface section is provided with a plurality of first threaded holes, the first through holes and the first threaded holes are in one-to-one correspondence, and the first connecting pieces are arranged in the corresponding first through holes and first threaded holes.
4. The combination shaft of claim 2, further comprising a second connector having an externally threaded section, wherein the end plate has a second threaded bore, wherein the externally threaded section of the second connector is coupled to the second threaded bore, and wherein the second connector is rotatably supported against the shaft body to separate the sleeve from the shaft body after the first connector is disengaged from the first threaded bore.
5. The composite shaft of any one of claims 1-4 wherein the sleeve further comprises a deformation section for elastically deforming when the sleeve is supported by the tapered section.
6. The composite shaft of claim 5 wherein the deformation section is an annular groove formed in the inner cavity of the sleeve, the annular groove is coaxial with the tapered bore section, and the annular groove is located at one of the axial ends of the tapered bore section with a smaller inner diameter.
7. A cutting portion, comprising:
the shell is provided with a first assembly hole and a second assembly hole, and the first assembly hole and the second assembly hole are coaxial;
the combination shaft according to any one of claims 1 to 6, both ends of the combination shaft being fitted into the first fitting hole and the second fitting hole, respectively.
8. The cutting portion of claim 7, wherein both ends of the shaft body have tapered surface sections, the first and second assembly holes are through holes, and both ends of the shaft body are assembled in the corresponding assembly holes through the sleeve body and the first connecting piece.
9. The cutting unit according to claim 7, wherein one end of the shaft body has a tapered section, the first fitting hole is a blind hole, the second fitting hole is a through hole, the end of the shaft body having the tapered section is fitted in the second fitting hole through the sleeve body and the first connecting member, and the other end of the shaft body is fitted in the first fitting hole.
10. The cutting portion of claim 1, further comprising a gear mounted to the shaft by a bearing.
CN202310694442.XA 2023-06-09 2023-06-09 Combined shaft and cutting part with same Pending CN116696922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310694442.XA CN116696922A (en) 2023-06-09 2023-06-09 Combined shaft and cutting part with same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310694442.XA CN116696922A (en) 2023-06-09 2023-06-09 Combined shaft and cutting part with same

Publications (1)

Publication Number Publication Date
CN116696922A true CN116696922A (en) 2023-09-05

Family

ID=87833573

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310694442.XA Pending CN116696922A (en) 2023-06-09 2023-06-09 Combined shaft and cutting part with same

Country Status (1)

Country Link
CN (1) CN116696922A (en)

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