CN112983709A - Centrifugal overload protection starting drive and engine - Google Patents
Centrifugal overload protection starting drive and engine Download PDFInfo
- Publication number
- CN112983709A CN112983709A CN201911310754.6A CN201911310754A CN112983709A CN 112983709 A CN112983709 A CN 112983709A CN 201911310754 A CN201911310754 A CN 201911310754A CN 112983709 A CN112983709 A CN 112983709A
- Authority
- CN
- China
- Prior art keywords
- starting
- centrifugal
- shaft
- gear
- overload protection
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N5/00—Starting apparatus having mechanical power storage
- F02N5/02—Starting apparatus having mechanical power storage of spring type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
- F02N15/026—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the centrifugal type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
Abstract
The invention discloses an engine and a centrifugal overload protection starting device, wherein the centrifugal overload protection starting device comprises a starting shaft and a starting gear, the starting shaft is provided with an outer sliding groove, the starting gear is provided with an inner sliding groove, and a spring used for connecting a centrifugal sliding block is further arranged in the outer sliding groove. When the starting shaft is in a starting operation state, the centrifugal slide block rotates along with the starting shaft, slides outwards from the outer sliding groove of the starting shaft under the action of centrifugal force until the outer end part of the centrifugal slide block enters the inner sliding groove of the starting gear, and therefore the starting shaft and the starting gear are connected to carry out power transmission; when the whole device is started, the starting shaft stops working, and the centrifugal slide block slides into the outer slide groove of the starting shaft from the inside to the outer end part of the centrifugal slide block under the action of the spring force, so that the power connection between the starting shaft and the transmission gear is automatically disconnected. If abnormal working states such as reverse rotation occur, idling will occur between the starting gear and the starting shaft, so that the effects of protecting the starting shaft and the starting gear are achieved.
Description
Technical Field
The invention relates to the technical field of gear type mechanical starting, in particular to a centrifugal overload protection starting device and an engine comprising the same.
Background
In the gear type mechanical starting device, the traditional starting gear and the starting shaft are connected by key, interference or integrated, and the starting shaft and the transmission gear 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 start shaft and the drive gear, when whole device was in abnormal operating condition such as reversal, the start shaft and the drive gear trouble such as fracture appear 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 centrifugal overload protection starting device, wherein a starting shaft and a starting gear of the centrifugal overload protection starting device can be effectively protected in an abnormal working state. Another object of the present invention is to provide an engine comprising the centrifugal overload protection starting apparatus described above.
In order to achieve the purpose, the invention provides a centrifugal overload protection starting device, which comprises a starting shaft, a starting gear, a transmission shaft and a transmission gear, wherein the starting gear is concentrically sleeved outside the starting shaft and is in small clearance fit with the starting shaft;
the outer periphery of the starting shaft is provided with an outer sliding chute extending along the radial direction, the inner periphery of the starting gear is provided with an inner sliding chute extending along the radial direction, and a spring used for connecting the centrifugal sliding block is arranged in the outer sliding chute;
in an unactuated state, the spring constrains the centrifugal slider within the outer chute; in a starting state, the spring allows the centrifugal slide block to be clamped between the inner chute and the outer chute under the action of centrifugal force.
Preferably, the radial depth of the inner chute is smaller than the radial length of the centrifugal slider.
Preferably, the outer end surface of the centrifugal slider is an arc surface identical to the axial surface of the starting shaft.
Preferably, a plurality of springs are provided, and each spring is uniformly installed between the groove bottom of the outer chute and the centrifugal slider.
Preferably, the inner peripheral portion of the starting gear is further provided with a guide slideway, the guide slideway is an involute channel extending along the circumferential direction, one end of the guide slideway is opened on the inner peripheral wall of the starting gear, and the other end of the guide slideway is communicated with the inner chute, so that the outer end portion of the centrifugal slider is guided into the inner chute in a starting state.
Preferably, two or three groups of matched outer chutes, inner chutes, centrifugal sliders, springs and guide slideways are arranged, and the outer chutes and the inner chutes are circumferentially and uniformly distributed among the groups.
Preferably, the contact surface of the starting shaft and the starting gear is coated with lubricating grease or lubricating oil, or the contact surface is coated with a wear-resistant layer.
The invention also provides an engine which comprises the centrifugal overload protection starting device.
The centrifugal overload protection starting device provided by the invention is in power connection between the starting gear and the starting shaft through the slidable centrifugal slider; when the starting shaft is in a starting operation state, the centrifugal slide block rotates along with the starting shaft, slides outwards from the outer sliding groove of the starting shaft under the action of centrifugal force until the outer end part of the centrifugal slide block enters the inner sliding groove of the starting gear, and therefore the starting shaft and the starting gear are connected to carry out power transmission; when the whole device is started, the starting shaft stops working, the centrifugal slide block slides into the outer slide groove of the starting shaft from the inside to the outer end part of the centrifugal slide block under the action of the spring force, and therefore the power connection between the starting shaft and the transmission gear is automatically disconnected. If abnormal working states such as reverse rotation occur, idling can occur between the starting gear and the starting shaft, so that the effects of protecting the starting shaft and the starting gear are achieved, and loss is reduced.
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 centrifugal overload protection starting device according to an embodiment of the present invention in an unactuated state;
FIG. 2 is a schematic view of the apparatus of FIG. 1 in an activated state;
FIG. 3 is a schematic sectional view taken along line A-A 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 core of the invention is to provide a centrifugal overload protection starting device, and a starting shaft and a starting gear of the centrifugal overload protection starting device can be effectively protected in an abnormal working state. Another core of the invention is to provide an engine comprising the centrifugal overload protection starting device.
Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a centrifugal overload protection starting device according to an embodiment of the present invention in an un-started state; FIG. 2 is a schematic view of the apparatus of FIG. 1 in an activated state; FIG. 3 is a schematic sectional view taken along line A-A in FIG. 1.
In a first embodiment, the centrifugal overload protection starting device provided by the invention comprises a starting shaft, a starting gear 2, a transmission shaft 3 and a transmission gear 4, wherein the starting gear 2 is sleeved outside the starting shaft 1, the starting gear and the transmission shaft are obviously concentrically arranged, and a small clearance fit is required so as to perform stable relative rotation when necessary; similarly, the transmission gear 3 is sleeved outside the transmission shaft 4, and the transmission gear 3 and the transmission shaft are obviously arranged concentrically.
An outer runner 5 is provided on the outer peripheral portion of the starting shaft 1, the outer runner 5 extending substantially in the radial direction of the starting shaft 1, and having a closed inner end and an open outer end on the outer surface of the starting shaft 1. Correspondingly, an inner slide groove 6 is provided on the inner peripheral portion of the starting gear 2, the inner slide groove 6 extending substantially in the radial direction of the starting gear 2, and has an outer end closed and an inner end opened on the driven surface of the starting gear 2.
The centrifugal overload protection starting device further comprises a centrifugal slider 7, wherein the centrifugal slider 7 is arranged in the outer sliding chute 5 and the inner sliding chute 6 and can slide in the radial direction in the space provided by the outer sliding chute 5 and the inner sliding chute 6.
The outer end face of the centrifugal slider 7 can be further set to be an arc face the same as the axial face of the starting shaft 1, so that the depth of the outer chute 5 can be reduced as much as possible, and the strength design of the driving shaft 1 is facilitated.
Furthermore, a spring 8 is provided between the centrifugal slider 7 and the actuating shaft 1, which spring 8 tends to move the centrifugal slider 7 inwards.
The number of the springs 8 can be one or more; when a plurality of springs 8 are arranged, the springs 8 can be uniformly arranged between the bottom of the outer chute 5 and the centrifugal slider 7.
In the non-starting state, the contraction force of the spring 8 can restrain the centrifugal slide block 7 in the outer slide groove 5; under the starting state, the centrifugal slider 7 rotates along with the starting shaft 1 and is acted by centrifugal force, the centrifugal force of the centrifugal slider 7 can overcome the contraction force of the spring 8 through properly selecting the structural parameters of the spring 8 under the starting state, and then the centrifugal slider 7 slides outwards and is clamped into the position between the inner chute 6 and the outer chute 5.
In order to make the above process more reliable, the radial depth of the inner slide 6 may be further set to be smaller than the radial length of the centrifugal slider 7, so as to avoid the possibility that the centrifugal slider 7 completely enters the inner slide 6 in the starting state, and also to facilitate the strength design of the driving gear 2.
The centrifugal overload protection starting device provided by the invention is in power connection between the starting gear and the starting shaft through the slidable centrifugal slider; when the starting shaft is in a starting operation state, the centrifugal slide block rotates along with the starting shaft, slides outwards from the outer sliding groove of the starting shaft under the action of centrifugal force until the outer end part of the centrifugal slide block enters the inner sliding groove of the starting gear, and therefore the starting shaft and the starting gear are connected to carry out power transmission; after the whole device normally works, the motor stops working, because the transmission shaft and the transmission gear are usually connected by a one-way driving structure, the transmission shaft and the transmission gear gradually generate a rotation speed difference, the transmission gear gradually stops working under the action of the one-way driving device, so that the gear on the starting shaft stops rotating, the centrifugal slider moves from the outer chute to the inner chute under the action of the spring force until the outer end part of the centrifugal slider completely slides into the outer chute of the starting shaft, and the power connection between the starting shaft and the transmission gear is automatically disconnected. If abnormal working states such as reverse rotation occur, idling can occur between the starting gear and the starting shaft, so that the effects of protecting the starting shaft and the starting gear are achieved, and loss is reduced.
In another embodiment, the centrifugal overload protection starting device provided by the invention can be further improved.
A guide slide 9 may be further provided at an inner peripheral portion of the starting gear 2.
The guide slideway 9 is a channel which is opened on the inner peripheral wall of the starting gear 2 and extends along the circumferential direction, the channel is an involute channel (not necessarily an involute with strict requirements), one end of the channel starts from the inner peripheral wall of the starting gear 2, and the other end of the channel is communicated with the inner chute 6.
Thus, in the starting state, the outer end of the centrifugal slider 7 is gradually guided into the inner chute 6 along the guide slideway, thereby providing convenience for the centrifugal slider 7 to smoothly slide into the inner chute 6 and reducing the power connection time.
In addition, the centrifugal overload protection starting device provided by the invention can be provided with only one group of structures such as the outer sliding groove 5, the inner sliding groove 6, the centrifugal sliding block 7, the spring 8, the guide slideway 9 and the like, and can also be provided with a plurality of groups of structures, such as two groups or three groups, wherein the groups are uniformly distributed in the circumferential direction.
The contact surface between the starting shaft 1 and the starting gear 2 may be coated with grease or lubricant, or the contact surface may be coated with an anti-wear layer.
The engine provided by the invention comprises any centrifugal overload protection starting device, 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 centrifugal overload protection starting 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 centrifugal overload protection starting device comprises a starting shaft (1), a starting gear (2) which is concentrically sleeved on the outer side of the starting shaft (1) and is in small clearance fit with the starting shaft, a transmission shaft (3) and a transmission gear (4) which is concentrically sleeved on the outer side of the transmission shaft (3); it is characterized in that the preparation method is characterized in that,
an outer sliding groove (5) extending along the radial direction is formed in the outer peripheral portion of the starting shaft (1), an inner sliding groove (6) extending along the radial direction is formed in the inner peripheral portion of the starting gear (2), and a spring (8) used for being connected with a centrifugal sliding block (7) is further arranged in the outer sliding groove (5);
in the non-activated state, the spring (8) constrains the centrifugal slider (7) within the outer chute (5); in the starting state, the spring (8) allows the centrifugal slider (7) to be clamped between the inner chute (6) and the outer chute (5) under the action of centrifugal force.
2. A centrifugal overload protection startup device according to claim 1, characterized in that the radial depth of the inner chute (6) is smaller than the radial length of the centrifugal slider (7).
3. A centrifugal overload protection starting device according to claim 1, characterized in that the outer end surface of the centrifugal slider (7) is an arc-shaped surface identical to the axial surface of the starting shaft (1).
4. A centrifugal overload protection starting device according to claim 1, characterised in that a plurality of springs (8) are provided, and that each spring (8) is mounted evenly between the bottom of the outer runner (5) and the centrifugal slider (7).
5. A centrifugal overload protection starting device according to any one of claims 1 to 4, wherein the starting gear (2) is further provided at its inner periphery with a guide runner (9), the guide runner (9) is a circumferentially extending involute channel, one end of which opens onto the inner peripheral wall of the starting gear (2) and the other end of which communicates with the inner chute (6) for guiding the outer end of the centrifugal slider (7) into the inner chute (6) in the starting state.
6. A centrifugal overload protection starting device according to claim 5, characterized in that two or three sets of the outer runner (5), the inner runner (6), the centrifugal slider (7), the spring (8) and the guide runner (9) are provided in cooperation and are circumferentially and uniformly distributed among each set.
7. A centrifugal overload protection starting device according to claim 1, characterized in that the contact surfaces of the starting shaft (1) and the starting gear (2) are coated with grease or oil or with an anti-wear layer.
8. An engine comprising a centrifugal overload protection starting device according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310754.6A CN112983709A (en) | 2019-12-18 | 2019-12-18 | Centrifugal overload protection starting drive and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310754.6A CN112983709A (en) | 2019-12-18 | 2019-12-18 | Centrifugal overload protection starting drive and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112983709A true CN112983709A (en) | 2021-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911310754.6A Pending CN112983709A (en) | 2019-12-18 | 2019-12-18 | Centrifugal overload protection starting drive and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112983709A (en) |
Citations (14)
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|---|---|---|---|---|
| GB403776A (en) * | 1931-09-15 | 1934-01-04 | Bendix Aviat Corp | Starting mechanism for internal combustion engines |
| US4114746A (en) * | 1976-05-18 | 1978-09-19 | Sawafuji Denki Kabushiki Kaisha | Overrunning clutch device for engine starting unit |
| US4712435A (en) * | 1984-01-30 | 1987-12-15 | Facet Enterprises, Inc. | Engine starter gearing |
| US4777836A (en) * | 1986-09-15 | 1988-10-18 | Facet Enterprises, Inc. | Engine starter gearing |
| CN2470558Y (en) * | 2000-12-23 | 2002-01-09 | 李长兴 | Mechanical starting device of diesel engine |
| CN2522638Y (en) * | 2002-01-27 | 2002-11-27 | 姚金成 | Tractor starting apparatus |
| CN2582819Y (en) * | 2002-04-12 | 2003-10-29 | 李士鑫 | Built-in flywheel impact electric wrench |
| CN201043591Y (en) * | 2007-05-15 | 2008-04-02 | 山东科技大学 | Step and stepless combined 5-axis transmission box |
| CN102465810A (en) * | 2010-11-10 | 2012-05-23 | 李景刚 | Magnetic starter |
| CN102877999A (en) * | 2012-11-05 | 2013-01-16 | 邓勇 | Starter of micro-tillage machine |
| CN203202068U (en) * | 2013-04-07 | 2013-09-18 | 洪天野 | Full-automatic small-torque drive clutch |
| CN206175528U (en) * | 2016-07-29 | 2017-05-17 | 北京中瑞普德创新科技发展有限公司 | Automatic dry -type centrifugal roller torque force clutch |
| CN206555324U (en) * | 2017-03-14 | 2017-10-13 | 长沙医学院 | A kind of clutch for classroom projector screen elevating control |
| CN108506371A (en) * | 2018-04-25 | 2018-09-07 | 张微 | A kind of interruption that new-energy automobile uses acceleration clutch |
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2019
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| GB403776A (en) * | 1931-09-15 | 1934-01-04 | Bendix Aviat Corp | Starting mechanism for internal combustion engines |
| US4114746A (en) * | 1976-05-18 | 1978-09-19 | Sawafuji Denki Kabushiki Kaisha | Overrunning clutch device for engine starting unit |
| US4712435A (en) * | 1984-01-30 | 1987-12-15 | Facet Enterprises, Inc. | Engine starter gearing |
| US4777836A (en) * | 1986-09-15 | 1988-10-18 | Facet Enterprises, Inc. | Engine starter gearing |
| CN2470558Y (en) * | 2000-12-23 | 2002-01-09 | 李长兴 | Mechanical starting device of diesel engine |
| CN2522638Y (en) * | 2002-01-27 | 2002-11-27 | 姚金成 | Tractor starting apparatus |
| CN2582819Y (en) * | 2002-04-12 | 2003-10-29 | 李士鑫 | Built-in flywheel impact electric wrench |
| CN201043591Y (en) * | 2007-05-15 | 2008-04-02 | 山东科技大学 | Step and stepless combined 5-axis transmission box |
| CN102465810A (en) * | 2010-11-10 | 2012-05-23 | 李景刚 | Magnetic starter |
| CN102877999A (en) * | 2012-11-05 | 2013-01-16 | 邓勇 | Starter of micro-tillage machine |
| CN203202068U (en) * | 2013-04-07 | 2013-09-18 | 洪天野 | Full-automatic small-torque drive clutch |
| CN206175528U (en) * | 2016-07-29 | 2017-05-17 | 北京中瑞普德创新科技发展有限公司 | Automatic dry -type centrifugal roller torque force clutch |
| CN206555324U (en) * | 2017-03-14 | 2017-10-13 | 长沙医学院 | A kind of clutch for classroom projector screen elevating control |
| CN108506371A (en) * | 2018-04-25 | 2018-09-07 | 张微 | A kind of interruption that new-energy automobile uses acceleration clutch |
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Application publication date: 20210618 |
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