CN211778610U - Keyless coupling capable of positioning light load transmission and shaft hole transmission structure - Google Patents
Keyless coupling capable of positioning light load transmission and shaft hole transmission structure Download PDFInfo
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- CN211778610U CN211778610U CN202020356048.7U CN202020356048U CN211778610U CN 211778610 U CN211778610 U CN 211778610U CN 202020356048 U CN202020356048 U CN 202020356048U CN 211778610 U CN211778610 U CN 211778610U
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Abstract
The utility model relates to a can fix a position driven keyless shaft coupling and shaft hole transmission structure of light load, including coaxial arrangement's first bloated cover, second bloated cover and two clamping rings, the second bloated cover is established in the outside of first bloated cover, and the clamping ring sets up respectively in the both ends face department of second bloated cover, the both sides of the outer disc of first bloated cover are equipped with first inclined plane chamfer, the both sides of the inner disc of second bloated cover are provided with second inclined plane chamfer; an inner ring chamfer and an outer ring chamfer are arranged on the side face, close to the second expansion sleeve, of each compression ring, the inner ring chamfer is attached to the first inclined plane chamfer, and the outer ring chamfer is attached to the second inclined plane chamfer; two clamping rings can be close to each other and fixed, at the in-process that the clamping ring is close to each other: the first inclined chamfer is compressed to enable the inner ring of the first expansion sleeve to be contracted, and the second inclined chamfer is compressed to enable the outer ring of the second expansion sleeve to be expanded.
Description
Technical Field
The utility model belongs to the technical field of the shaft coupling, concretely relates to can fix a position driven keyless shaft coupling and shaft hole transmission structure of light load.
Background
The traditional coupler usually adopts single keys, multiple structures, splines or connection between profiles and a rotating shaft to realize torque transmission, so that key slots or profiles are required to exist on shaft extension of the rotating shaft, and the requirement on coaxiality precision of the installed coupler and the shaft is influenced.
The inventors have appreciated that when conventional keyless couplings are used to couple a keyless shaft to a machine member (gear, pulley, etc.), a shaft-hole connection is used to transmit torque. The fit precision of the coupler and the matched shaft end determines the transmission quality, and the coupler and the keyless shaft are in interference fit for improving the installation quality due to the fact that friction force is needed to transmit torque; and the interference fit requires that the machining precision of the inner diameter of the coupler and the outer diameter of the keyless shaft is higher.
In addition, a shrink fit method is generally used when a conventional coupling is installed, and a method of heating or expanding by oil pressure is used when the conventional coupling is disassembled. The kit needs to be heated during installation, a large amount of preparation time needs to be increased during disassembly, and the corresponding assembly or disassembly process is complicated due to interference fit; in addition, the shaft head and the inner surface of the coupling are likely to be damaged when the conventional coupling is disassembled by heating. When the shaft head is pulled, in order to ensure the appearance quality and the transmission torque, the procedures of repairing and reassembling are needed again, or the shaft and the coupler are scrapped when the shaft head is serious, so that the production efficiency is greatly reduced, and the production cost is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a keyless coupler capable of positioning light load transmission and a shaft hole transmission structure, which can solve the problem that the coaxiality is influenced when the keyless coupler is adopted among the existing shaft, the gear, the belt wheel and other parts; when the keyless coupling adopting the hot sleeve mode is adopted, the disassembly and the assembly are complex and the parts are easy to be damaged.
In order to achieve the above object, a first aspect of the present invention provides a keyless coupling capable of positioning light load transmission, which includes a first expansion sleeve, a second expansion sleeve and two compression rings, which are coaxially disposed, wherein the second expansion sleeve is sleeved outside the first expansion sleeve, and the compression rings are respectively disposed at two end faces of the second expansion sleeve;
two sides of the outer circular surface of the first expansion sleeve are provided with first inclined chamfer angles, and two sides of the inner circular surface of the second expansion sleeve are provided with second inclined chamfer angles; an inner ring chamfer and an outer ring chamfer are arranged on the side face, close to the second expansion sleeve, of each compression ring, the inner ring chamfer is attached to the first inclined plane chamfer, and the outer ring chamfer is attached to the second inclined plane chamfer;
two clamping rings can be close to each other and fixed, at the in-process that the clamping ring is close to each other: the first inclined chamfer is compressed to enable the inner ring of the first expansion sleeve to be contracted, and the second inclined chamfer is compressed to enable the outer ring of the second expansion sleeve to be expanded.
As a further limitation of the first aspect of the present invention, the round sides of the first and second expansion sleeves are respectively provided with an opening so as to facilitate the expansion or contraction.
As the utility model discloses the further injeciton of first aspect has the settlement pressure between the first inclined plane chamfer of clamping ring inner circle chamfer and first bloated cover, between the second inclined plane chamfer of the bloated cover of clamping ring outer lane chamfer and second to mutual pivoted frictional force between first bloated cover of restriction, the bloated cover of second, the clamping ring is provided.
The utility model discloses a second aspect provides an axle hole transmission structure, has utilized including axis of rotation and gear, the tip cover of axis of rotation is equipped with first bloated cover, and the cover is established in the inner circle of gear the second is bloated to overlap, and the diameter setting of two clamp plates is in the inner circle of gear, and the outer lane diameter of clamp plate equals the inner circle diameter of gear.
As the utility model discloses the further injeciton of second aspect, the outer disc of axis of rotation one end is provided with first ring channel, the cover is equipped with in the first ring channel first bloated cover, first ring channel is used for realizing the axial positioning of first bloated cover along the axis of rotation.
As the utility model discloses the further injeciton of second aspect, the interior disc department of gear is equipped with the second ring channel, the second expands the cover and establishes in the second ring channel, the second ring channel is used for realizing the second and expands the cover along the axial positioning of gear.
The beneficial effects of one or more technical schemes are as follows:
(1) the expansion effect of the first expansion sleeve and the second expansion sleeve is adopted, the inner ring of the first expansion sleeve is used for expanding the rotating shaft, the outer ring of the second shaft sleeve is used for expanding the fixed gear, the belt wheel and other rotating parts, the compression ring is used for fixing the first expansion sleeve and the second expansion sleeve, the relative rotation between the rotating shaft and the rotating parts is limited through friction force, key connection is not needed, and the coaxiality precision of connection between shaft holes cannot be influenced; and the parts can not be damaged due to the heating plugging.
(2) The expansion of the first expansion sleeve and the second expansion sleeve is pressed by the pressing ring, the pressing ring is matched and connected with the first expansion sleeve and the second expansion sleeve through inclined planes, the coaxiality is good, the positioning precision is high, the two pressing rings can move oppositely along the axis direction in diameter, the two pressing rings are converted into expansion or locking movement of the first expansion sleeve and the second expansion sleeve, and the installation is convenient.
(3) The positions of the first annular groove on the transmission shaft and the second annular groove of the inner holes of the rotary parts such as the gear, the belt wheel and the like are determined, so that the accurate positioning of the rotary parts such as the gear, the belt wheel and the like on the transmission shaft can be realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is an exploded view of the whole structure in embodiment 2 of the present invention;
fig. 2 is an axonometric view of the whole structure in embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a first expansion sleeve in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a second expansion sleeve in embodiment 1 of the present invention;
fig. 5 is a schematic view of a middle pressure ring structure according to embodiment 1 of the present invention.
In the figure: 1. a first pressure ring; 2. a first expansion sleeve; 3. a rotating shaft; 4. a gear; 5. a second expansion sleeve; 6. a second pressure ring; 7. a bolt; 201. a first expansion sleeve right inclined plane; 202. a first expansion sleeve left inclined plane; 203. an inner ring surface of the first expansion sleeve; 301. a first annular groove; 401. a second annular groove; 501. a second expansion sleeve right inclined plane; 502. The outer circular surface of the second expansion sleeve; 503. a second expansion sleeve left inclined plane; 601. a threaded hole; 603. a light hole;
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
For convenience of description, the words "up, down, left, right" in the present invention, if appearing, are intended to correspond only to the upper, lower, left, right directions of the drawings themselves, not to limit the structure, but merely to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Example 1
As shown in fig. 1 to 5, the present embodiment provides a keyless coupler capable of positioning light load transmission, including a first expansion sleeve 2, a second expansion sleeve 5 and two compression rings, which are coaxially arranged, wherein the second expansion sleeve 5 is sleeved outside the first expansion sleeve 2, and the compression rings are respectively disposed at two end faces of the second expansion sleeve 5;
two sides of the outer circular surface of the first expansion sleeve 2 are provided with first inclined chamfer angles, and two sides of the inner circular surface of the second expansion sleeve 5 are provided with second inclined chamfer angles; an inner ring chamfer and an outer ring chamfer are arranged at the side face of each compression ring close to the second expansion sleeve 5, the inner ring chamfer is attached to the first inclined plane chamfer, and the outer ring chamfer is attached to the second inclined plane chamfer.
Two clamping rings can be close to each other and fixed, at the in-process that the clamping ring is close to each other: the first inclined chamfer is compressed to enable the inner ring of the first expansion sleeve 2 to be contracted, and the second inclined chamfer is compressed to enable the outer ring of the second expansion sleeve 5 to be expanded.
First bloated cover 2 is used for the cover to establish in 3 outsides of axis of rotation, and the secondary shaft is used for the nestification to set up in the hole of rotating part, the tight fixing of axis of rotation 3 can be realized to the bloated tight of 2 inner circles of first bloated cover, and the fixed of rotating part can be realized to the bloated tight of 5 outer lanes of second bloated cover, it is fixed through the clamping ring between first bloated cover 2 and the second bloated cover 5.
Specifically, the first bevel chamfer, the second bevel chamfer, the inner ring chamfer and the outer ring chamfer may adopt a 45-degree chamfer structure, because the chamfer is a chamfer at the round side surface, the chamfer is in a tapered platform-shaped structure.
The first inclined chamfer forms a first expansion sleeve right inclined surface 201 and a first expansion sleeve left inclined surface 202. The inner cavity of the first expansion sleeve forms a first expansion sleeve inner ring surface 203.
A second expansion sleeve right inclined plane 501 is formed at the chamfer of the second inclined plane; a second expansion sleeve outer circumferential surface 502; a second expansion sleeve left bevel 503;
be provided with bolt hole or unthreaded hole on two clamping rings, be provided with bolt 7 in the bolt hole, the outer lane of first bloated cover 2 has the vertical clearance of settlement with the inner circle of second bloated cover 5, and the clearance is used for passing through bolt 7.
Specifically, 8 threaded holes are uniformly distributed in the second pressure ring 6; 8 holes are uniformly distributed in the first pressure ring 1, wherein 2 holes are threaded holes, and 6 holes are unthreaded holes of mounting bolts 7. The threaded hole 601 of the first compression ring 1 can be used as an installation hole and a dismounting hole. The bolt 7 is disassembled, the coupling piece is knocked lightly in the reverse direction or two standby threaded holes are adopted for disassembly, the disassembly is very easy, more importantly, the nondestructive disassembly can be realized, and the maintenance cost is greatly saved.
The round side surfaces of the first expansion sleeve 2 and the second expansion sleeve 5 are respectively provided with an opening so as to realize expansion or contraction.
Set pressure is provided between the chamfer of the inner ring of the pressure ring and the first chamfer of the first expansion sleeve 2 and between the chamfer of the outer ring of the pressure ring and the second chamfer of the second expansion sleeve 5, so as to provide friction force for limiting the mutual rotation between the first expansion sleeve 2, the second expansion sleeve 5 and the pressure ring.
The outer ring diameter of the second expansion sleeve 5 is larger than that of the compression ring, and the inner ring diameter of the first expansion sleeve 2 is smaller than that of the compression ring
Example 2
As shown in fig. 1 to 5, the present embodiment provides a shaft hole transmission structure, which utilizes the keyless shaft coupling capable of positioning light load transmission described in embodiment 1, and includes a rotating shaft 3 and a gear 4, wherein an end of the rotating shaft 3 is sleeved with a first expansion sleeve 2, an inner ring of the gear 4 is sleeved with a second expansion sleeve 5, diameters of two pressure plates are disposed in an inner ring of the gear 4, and a diameter of an outer ring of each pressure plate is equal to a diameter of an inner ring of the gear 4.
The excircle face of 3 one ends of axis of rotation is provided with first ring channel, the cover is equipped with in the first ring channel first bloated cover, first ring channel is used for realizing that first bloated cover is along axis of rotation 3's axial positioning.
A second annular groove 401 is formed in the inner circular surface of the gear 4, the second expansion sleeve is sleeved in the second annular groove 401, and the second annular groove 401 is used for achieving axial positioning of the second expansion sleeve along the gear 4.
The thickness of the first expansion sleeve 2 is equal to the width of the first annular groove, and the thickness of the second expansion sleeve 5 is equal to the width of the second annular groove 401.
The process of installing the coupler is as follows:
firstly, the first compression ring 1 is sleeved on the rotating shaft 3 in series and is placed on the right side of the first annular groove 301;
mounting the first expansion sleeve 2 on the first annular groove 301, wherein the inner annular surface 203 of the first expansion sleeve is matched with the first annular groove 301 of the rotating shaft 3;
mounting a second expansion sleeve 5 on a second annular groove 401 of the gear 4, wherein an outer annular surface 502 of the second expansion sleeve is matched with the second annular groove 401 of the gear 4;
the inner hole of the gear 4 provided with the second expansion sleeve 5 is sleeved in the rotating shaft 3 provided with the first compression ring 1 and the first expansion sleeve 2, the second compression ring 6 is sleeved in the rotating shaft 3, the inner ring chamfer of the first compression ring 1 is in contact fit with the first expansion sleeve right inclined plane 201, and the outer ring chamfer of the first compression ring 1 is in contact fit with the second expansion sleeve right inclined plane 501.
An inner ring chamfer of the second compression ring 6 is in contact fit with a left inclined surface 202 of the first expansion sleeve, and an outer ring chamfer of the second compression ring 2 is in contact fit with a left inclined surface 503 of the second expansion sleeve 5;
and aligning the mounting holes of the second compression ring 6 with the threaded holes of the first compression ring 1 one by one, and screwing the bolts 7. The first inclined chamfer in the first expansion sleeve is compressed through the inner ring chamfers of the second pressing ring 6 and the first pressing ring 1, and the second inclined chamfer in the second expansion sleeve is compressed through the outer ring chamfers of the second pressing ring 6 and the first pressing ring 1, so that the first expansion sleeve 2 and the second expansion sleeve 5 are deformed, the gear 4 and the rotating shaft 3 are connected into a whole, keyless connection is realized, and torque is transmitted.
The first annular groove 301 and the second annular groove 401 are sized to allow accurate positioning of the gear on the shaft.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (10)
1. A keyless coupler capable of positioning light load transmission is characterized by comprising a first expansion sleeve, a second expansion sleeve and two compression rings which are coaxially arranged, wherein the second expansion sleeve is sleeved outside the first expansion sleeve, and the compression rings are respectively arranged at two end faces of the second expansion sleeve;
two sides of the outer circular surface of the first expansion sleeve are provided with first inclined chamfer angles, and two sides of the inner circular surface of the second expansion sleeve are provided with second inclined chamfer angles; an inner ring chamfer and an outer ring chamfer are arranged on the side face, close to the second expansion sleeve, of each compression ring, the inner ring chamfer is attached to the first inclined plane chamfer, and the outer ring chamfer is attached to the second inclined plane chamfer;
two clamping rings can be close to each other and fixed, at the in-process that the clamping ring is close to each other: the first inclined chamfer is compressed to enable the inner ring of the first expansion sleeve to be contracted, and the second inclined chamfer is compressed to enable the outer ring of the second expansion sleeve to be expanded.
2. The keyless coupling capable of positioning light load transmission according to claim 1, wherein the first expansion sleeve is used for being sleeved outside the rotating shaft, the second expansion sleeve is used for being sleeved in an inner hole of the rotating part in an embedded mode, the rotating shaft can be fixed by expansion of an inner ring of the first expansion sleeve, the rotating part can be fixed by expansion of an outer ring of the second expansion sleeve, and the first expansion sleeve and the second expansion sleeve are fixed through the compression ring.
3. The keyless shaft coupling capable of realizing positioning and light load transmission according to claim 1, wherein threaded holes or unthreaded holes are formed in the two compression rings, bolts are arranged in the threaded holes, a set vertical gap is formed between the outer ring of the first expansion sleeve and the inner ring of the second expansion sleeve, and the gap is used for allowing the bolts to pass through.
4. The keyless coupling for a localized light load transmission as recited in claim 1, wherein the first and second expansion sleeves are provided with respective openings on their rounded sides to facilitate expansion or contraction.
5. The keyless shaft coupling capable of realizing positioning light load transmission according to claim 1, wherein a set pressure is provided between the inner ring chamfer of the pressing ring and the first inclined chamfer of the first expansion sleeve, and between the outer ring chamfer of the pressing ring and the second inclined chamfer of the second expansion sleeve, so as to provide a friction force for limiting mutual rotation among the first expansion sleeve, the second expansion sleeve and the pressing ring.
6. The keyless coupling for localized light load transmission according to claim 1 wherein the outer diameter of the second sleeve is greater than the outer diameter of the compression ring and the inner diameter of the first sleeve is less than the inner diameter of the compression ring.
7. A shaft hole transmission structure, which utilizes the keyless coupling for positionable light load transmission of any one of claims 1 to 6,
including axis of rotation and gear, the tip cover of axis of rotation is equipped with first bloated cover, and the cover is established in the inner circle of gear the second cover that expands, the diameter setting of two clamp plates is in the inner circle of gear, and the outer lane diameter of clamp plate equals the inner circle diameter of gear.
8. The shaft-hole transmission structure of claim 7, wherein the first annular groove 301 is formed in the outer circumferential surface of one end of the rotating shaft, the first expansion sleeve is sleeved in the first annular groove 301, and the first annular sleeve is used for achieving axial positioning of the first expansion sleeve along the rotating shaft.
9. The shaft hole transmission structure according to claim 8, wherein a second annular groove is formed at the inner circumferential surface of the gear, the second expansion sleeve is sleeved in the second annular groove, and the second annular groove is used for realizing the axial positioning of the second expansion sleeve along the gear.
10. The shaft hole transmission structure according to claim 9, wherein the thickness of the first expansion sleeve is equal to the width of the first annular groove 301, and the thickness of the second expansion sleeve is equal to the width of the second annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020356048.7U CN211778610U (en) | 2020-03-19 | 2020-03-19 | Keyless coupling capable of positioning light load transmission and shaft hole transmission structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020356048.7U CN211778610U (en) | 2020-03-19 | 2020-03-19 | Keyless coupling capable of positioning light load transmission and shaft hole transmission structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211778610U true CN211778610U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020356048.7U Expired - Fee Related CN211778610U (en) | 2020-03-19 | 2020-03-19 | Keyless coupling capable of positioning light load transmission and shaft hole transmission structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211778610U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237351A (en) * | 2020-03-19 | 2020-06-05 | 山东大学 | Keyless coupling capable of positioning light load transmission and shaft hole transmission structure |
| CN112682431A (en) * | 2020-12-22 | 2021-04-20 | 中国北方发动机研究所(天津) | Connecting structure of high-pressure oil pump and gear of diesel engine |
-
2020
- 2020-03-19 CN CN202020356048.7U patent/CN211778610U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237351A (en) * | 2020-03-19 | 2020-06-05 | 山东大学 | Keyless coupling capable of positioning light load transmission and shaft hole transmission structure |
| CN112682431A (en) * | 2020-12-22 | 2021-04-20 | 中国北方发动机研究所(天津) | Connecting structure of high-pressure oil pump and gear of diesel engine |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 Termination date: 20210319 |
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| CF01 | Termination of patent right due to non-payment of annual fee |