CN112984003A - Wedge type overload protection transmission device and engine - Google Patents
Wedge type overload protection transmission device and engine Download PDFInfo
- Publication number
- CN112984003A CN112984003A CN201911312429.3A CN201911312429A CN112984003A CN 112984003 A CN112984003 A CN 112984003A CN 201911312429 A CN201911312429 A CN 201911312429A CN 112984003 A CN112984003 A CN 112984003A
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- Prior art keywords
- fan
- transmission
- shaped
- transmission shaft
- sector
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Classifications
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D2041/0603—Sprag details
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D2041/0605—Spring details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention discloses an engine and a wedge type overload protection transmission device, wherein the wedge type overload protection transmission device comprises a first transmission shaft and a first transmission gear, a fan-shaped wedge block is installed on the first transmission shaft, the first transmission gear is provided with a fan-shaped outer cavity for accommodating the fan-shaped wedge block, and a protection inner cavity for accommodating the fan-shaped wedge block and a spring is arranged on the periphery of the first transmission shaft. In the power transmission process, the fan-shaped wedge block moves to the fan-shaped outer cavity of the first transmission gear due to the action of the spring force, and the first transmission shaft and the first transmission gear are meshed together through the fan-shaped wedge block and the fan-shaped outer cavity to perform power transmission. Under the reverse rotation or overload state, the first transmission gear and the first transmission shaft slide relatively by large torque, the fan-shaped outer cavity pushes the fan-shaped wedge block to compress the spring, and the fan-shaped wedge block finally returns to the protection inner cavity, so that the connection between the first transmission gear and the first transmission shaft is disconnected, the first transmission gear and the first transmission shaft idle rotate, and the protection purpose is realized.
Description
Technical Field
The invention relates to the technical field of gear type mechanical transmission, in particular to a wedge type overload protection transmission device and an engine comprising the same.
Background
In the gear type mechanical starting device, the traditional transmission gear and the transmission shaft are connected by key connection, interference connection or are integrated into a whole, and the transmission gear and the transmission shaft are always connected in any working state in the power transmission process.
Because in traditional gear mechanical transmission device, can't realize the power disconnection between drive gear and the transmission shaft, when whole device is in the improper operating condition such as transshipping or reversal, drive gear and transmission shaft break down etc. trouble under the effect of too big moment of torsion to lead to whole mechanical device to scrap.
Disclosure of Invention
The invention aims to provide a wedge type overload protection transmission device, wherein a transmission shaft and a transmission gear of the wedge type overload protection transmission device can be effectively protected in an abnormal working state. Another object of the present invention is to provide an engine including the above sprag-type overload protection transmission.
In order to achieve the purpose, the invention provides a wedge type overload protection transmission device, which comprises a first transmission shaft, a first transmission gear, a second transmission shaft and a second transmission gear, wherein the first transmission gear is concentrically sleeved outside the first transmission shaft and is in small clearance fit with the first transmission shaft;
the periphery of the first transmission shaft is provided with a sector wedge block through a rotating shaft, and the rotating shaft is parallel to the axis of the first transmission shaft; a fan-shaped outer cavity for accommodating the fan-shaped wedge block is arranged at the inner peripheral part of the first transmission gear, and a protection inner cavity for accommodating the fan-shaped wedge block and the spring is arranged at the outer peripheral part of the first transmission gear;
under a normal working state, the spring pushes the fan-shaped wedge block to be clamped into the fan-shaped outer cavity around the rotating shaft; in an abnormal operating condition of overload or reverse rotation, the first transmission gear compresses the spring through the sector wedge, so that the sector wedge is completely inserted into the protection cavity.
Preferably, the radius of the arc surface of the fan-shaped outer cavity is the same as that of the arc surface of the fan-shaped wedge block.
Preferably, a plurality of uniformly distributed springs are arranged between the fan-shaped wedge block and the protection inner cavity.
Preferably, two or three groups of matched fan-shaped outer cavities, protection inner cavities, fan-shaped wedges and springs are arranged, and the groups are circumferentially and uniformly distributed.
Preferably, the contact surfaces of the first transmission shaft and the first transmission gear are coated with grease or lubricating oil, or the contact surfaces are coated with a wear-resistant layer.
Preferably, the cross-sectional shape of the protection cavity is a sector, and the sector angle ranges from 60 degrees to 70 degrees.
Preferably, the sector angle of the sector wedge is in the range of 45 to 60 degrees.
The invention also provides an engine which comprises the wedge type overload protection transmission device.
The wedge type overload protection transmission device provided by the invention replaces the traditional key connection with the movable fan-shaped wedge block, and in the normal power transmission process, due to the action of the spring force, the fan-shaped wedge block slides out of the protection inner cavity of the first transmission shaft and moves into the fan-shaped outer cavity of the first transmission gear, and the first transmission shaft and the first transmission gear are meshed and connected together through the fan-shaped wedge block and the fan-shaped outer cavity to perform power transmission. Under the reverse rotation or overload state, the first transmission gear and the first transmission shaft slide relatively by large torque, the fan-shaped outer cavity pushes the fan-shaped wedge block to further compress the spring, and the fan-shaped wedge block finally returns to the protection inner cavity, so that the connection between the first transmission gear and the first transmission shaft is disconnected, the first transmission gear and the first transmission shaft idle rotate, and the protection purpose is realized.
The engine provided by the invention has the similar advantages and is not described in detail.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a wedge type overload protection transmission according to an embodiment of the present invention in a normal state;
FIG. 2 is a schematic view of the apparatus of FIG. 1 in an abnormal state;
FIG. 3 is a schematic view of an alternative construction of the relevant portion of FIG. 1;
fig. 4 is a schematic view of another alternative structure of the relevant part in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The key point of the invention is to provide a wedge type overload protection transmission device, and a transmission shaft and a transmission gear of the wedge type overload protection transmission device can be effectively protected in an abnormal working state. Another core of the invention is to provide an engine comprising the wedge type overload protection transmission device.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a wedge type overload protection transmission device according to an embodiment of the present invention in a normal state; fig. 2 is a schematic structural diagram of the device in fig. 1 in an abnormal state.
In a first embodiment, the wedge type overload protection transmission device provided by the invention comprises a first transmission shaft 1, a first transmission gear 2, a second transmission shaft 3 and a second transmission gear 4, wherein the first transmission gear 2 is sleeved outside the first transmission shaft 1, and the first transmission gear and the second transmission gear are obviously arranged concentrically and should be closely matched with each other in a clearance manner so as to perform stable relative rotation when necessary; similarly, the second transmission shaft 3 is sleeved outside the second transmission gear 4, and obviously, the two are also concentrically arranged.
A sector wedge 7 is provided on the outer circumferential portion of the first transmission shaft 1, and the sector wedge 7 may have a substantially sector-shaped cross section, and is not required to have a strict sector shape, and a sector center portion thereof is connected to the first transmission shaft 1 via a rotation shaft parallel to the axis of the first transmission shaft 1.
The outer periphery of the first transmission shaft 1 is further provided with a protective inner cavity 6 at a position close to the fan-shaped wedge 7, and the protective inner cavity 6 has a proper size and shape so that the fan-shaped wedge 7 can be accommodated after rotating inwards around the rotating shaft.
Although it is not necessary to limit the fan angle of the fan-shaped wedge 7 to a specific value, the range may be set to 45 degrees to 60 degrees.
The cross-sectional shape of the protection cavity 6 may also be set to a fan shape, and the fan angle thereof may be set to 60 to 70 degrees.
The first transmission gear 2 is further provided with a fan-shaped outer cavity 5, the fan-shaped inner cavity 5 is arranged on the inner peripheral wall surface of the first transmission gear 2, and the fan-shaped inner cavity 5 can be accommodated after the fan-shaped wedge 7 rotates outwards around the rotating shaft.
Of course, the arc radius of the fan-shaped outer cavity 5 and the arc radius of the fan-shaped wedge 7 may be set to be the same.
A spring 8 is provided between the protection cavity 6 and the sector wedge 7, and the spring 8 can be set in a compressed state to provide an elastic force for pushing the sector wedge 7 outward. Of course, the shape and size of the protective cavity 6 should also be designed taking into account the presence of the spring 8.
The number of the springs 8 can be one or more; when a plurality of springs 8 are provided, the springs 8 can be uniformly installed.
Under the normal working state, the elasticity of the spring 8 is enough to push the fan-shaped wedge 7 to rotate around the rotating shaft and then be clamped into the fan-shaped outer cavity 5; in an abnormal operating state of overload or reverse rotation, the first transmission gear 2 causes the spring 8 to be compressed by pushing the sector wedge 7, so that the sector wedge 7 is completely inserted into the protection cavity 6.
The wedge type overload protection transmission device provided by the invention replaces the traditional key connection with the movable fan-shaped wedge block, and in the normal power transmission process, due to the action of the spring force, the fan-shaped wedge block slides out of the protection inner cavity of the first transmission shaft and moves into the fan-shaped outer cavity of the first transmission gear, and the first transmission shaft and the first transmission gear are meshed and connected together through the fan-shaped wedge block and the fan-shaped outer cavity to perform power transmission. Under the reverse rotation or overload state, the first transmission gear and the first transmission shaft slide relatively by large torque, the fan-shaped outer cavity pushes the fan-shaped wedge block to further compress the spring, and the fan-shaped wedge block finally returns to the protection inner cavity, so that the connection between the first transmission gear and the first transmission shaft is disconnected, the first transmission gear and the first transmission shaft idle rotate, and the protection purpose is realized.
Referring to fig. 3 and 4, fig. 3 is a schematic view of an alternative structure of a relevant portion of fig. 1; fig. 4 is a schematic view of another alternative structure of the relevant part in fig. 1.
Some other improvements may also continue. For example, two or three sets of matched outer fan-shaped cavities 5, inner protective cavities 6, fan-shaped wedges 7 and springs 8 may be provided, which are distributed uniformly in the circumferential direction between the sets. This will allow the problems of torque transfer and strength of the gears and shafts to be solved more smoothly.
In addition, the contact surface between the first transmission shaft 1 and the first transmission gear 2 may be coated with grease or lubricant, or a wear-resistant layer may be plated on the contact surface.
The engine provided by the invention comprises any one of the wedge type overload protection transmission devices, has similar advantages, and is not described in detail herein.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The wedge type overload protection transmission device and the engine provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. A wedge type overload protection transmission device comprises a first transmission shaft (1), a first transmission gear (2) which is concentrically sleeved on the outer side of the first transmission shaft (1) and is in small clearance fit with the first transmission shaft, a second transmission shaft (3) and a second transmission gear (4) which is concentrically sleeved on the outer side of the second transmission shaft (3); it is characterized in that the preparation method is characterized in that,
a fan-shaped wedge block (7) is mounted on the periphery of the first transmission shaft (1) through a rotating shaft, and the rotating shaft is parallel to the axis of the first transmission shaft (1); a fan-shaped outer cavity (5) for accommodating the fan-shaped wedge block (7) is arranged at the inner peripheral part of the first transmission gear (2), and a protection inner cavity (6) for accommodating the fan-shaped wedge block (7) and a spring (8) is arranged at the outer peripheral part of the first transmission shaft (1);
under the normal working state, the spring (8) pushes the fan-shaped wedge block (7) to be clamped into the fan-shaped outer cavity (5) around the rotating shaft; in an abnormal operating state of overload or reverse rotation, the first transmission gear (2) enables the spring (8) to be compressed through the sector wedge (7), so that the sector wedge (7) completely enters the protection cavity (6).
2. A sprag-type overload protection transmission according to claim 1, characterized in that the radius of the arc of the outer sector cavity (5) is the same as the radius of the arc of the sector sprag (7).
3. A wedge type overload protection transmission according to claim 1, wherein a plurality of evenly distributed springs (8) are arranged between the segmental wedges (7) and the protection chamber (6).
4. A wedge block type overload protection transmission according to claim 1, wherein two or three sets of the outer sector-shaped cavity (5), the inner protection cavity (6), the wedge sector-shaped block (7) and the spring (8) are provided in cooperation and are circumferentially and uniformly distributed among the sets.
5. A sprag overload protection transmission according to claim 1, characterised in that the contact surfaces of the first transmission shaft (1) and the first transmission gear (2) are coated with grease or oil or are coated with a wear layer.
6. Wedge type overload protection transmission according to claim 1, characterized in that the cross-sectional shape of the protection cavity (6) is sector shaped with a sector angle in the range of 60 to 70 degrees.
7. A sprag-type overload protection transmission according to claim 1, characterized in that the sector angle of the segmental sprags (7) ranges from 45 to 60 degrees.
8. An engine comprising a sprag-type overload protection transmission according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312429.3A CN112984003A (en) | 2019-12-18 | 2019-12-18 | Wedge type overload protection transmission device and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312429.3A CN112984003A (en) | 2019-12-18 | 2019-12-18 | Wedge type overload protection transmission device and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112984003A true CN112984003A (en) | 2021-06-18 |
Family
ID=76344019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911312429.3A Pending CN112984003A (en) | 2019-12-18 | 2019-12-18 | Wedge type overload protection transmission device and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112984003A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB594536A (en) * | 1944-02-25 | 1947-11-13 | Otto Edward Wolff | Improvements in or relating to torque transmitting devices |
| GB670279A (en) * | 1949-03-16 | 1952-04-16 | Mini Of Supply | Improvements in or relating to mechanism |
| GB1420352A (en) * | 1972-02-23 | 1976-01-07 | Anvar | One-way drive rotary couplings especially mechanisms of the free wheel type |
| CN2482607Y (en) * | 2001-05-30 | 2002-03-20 | 杨军 | Free-wheeling clutch variable-speed drive energy-economizer |
| JP2009097442A (en) * | 2007-10-17 | 2009-05-07 | Denso Corp | Starter |
| CN201502643U (en) * | 2009-09-30 | 2010-06-09 | 沈岩华 | Automobile one-way clutch sliding device |
| CN203335681U (en) * | 2013-06-17 | 2013-12-11 | 李军香 | Surface-contact overrun clutch |
| US20180038423A1 (en) * | 2016-08-05 | 2018-02-08 | Schaeffler Technologies AG & Co. KG | Wedge clutch assembly having segmented wedges and wedge clutch assembly having an axially displaceable assembly |
| CN107830117A (en) * | 2017-12-01 | 2018-03-23 | 新乡市豫新航空工业制品有限公司 | A kind of speedup reversing box with reversion transcendent function |
-
2019
- 2019-12-18 CN CN201911312429.3A patent/CN112984003A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB594536A (en) * | 1944-02-25 | 1947-11-13 | Otto Edward Wolff | Improvements in or relating to torque transmitting devices |
| GB670279A (en) * | 1949-03-16 | 1952-04-16 | Mini Of Supply | Improvements in or relating to mechanism |
| GB1420352A (en) * | 1972-02-23 | 1976-01-07 | Anvar | One-way drive rotary couplings especially mechanisms of the free wheel type |
| CN2482607Y (en) * | 2001-05-30 | 2002-03-20 | 杨军 | Free-wheeling clutch variable-speed drive energy-economizer |
| JP2009097442A (en) * | 2007-10-17 | 2009-05-07 | Denso Corp | Starter |
| CN201502643U (en) * | 2009-09-30 | 2010-06-09 | 沈岩华 | Automobile one-way clutch sliding device |
| CN203335681U (en) * | 2013-06-17 | 2013-12-11 | 李军香 | Surface-contact overrun clutch |
| US20180038423A1 (en) * | 2016-08-05 | 2018-02-08 | Schaeffler Technologies AG & Co. KG | Wedge clutch assembly having segmented wedges and wedge clutch assembly having an axially displaceable assembly |
| CN107830117A (en) * | 2017-12-01 | 2018-03-23 | 新乡市豫新航空工业制品有限公司 | A kind of speedup reversing box with reversion transcendent function |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210618 |