CN112049746B - Adopt duplex gear and engine of centrifugal gear assembly of flail piece - Google Patents
Adopt duplex gear and engine of centrifugal gear assembly of flail piece Download PDFInfo
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- CN112049746B CN112049746B CN202010865673.9A CN202010865673A CN112049746B CN 112049746 B CN112049746 B CN 112049746B CN 202010865673 A CN202010865673 A CN 202010865673A CN 112049746 B CN112049746 B CN 112049746B
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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
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention discloses a duplicate gear and an engine adopting a flail block centrifugal gear assembly, comprising a transmission shaft, a driven gear, a thrust piece and a centrifugal flail block; the thrust piece is sleeved on the transmission shaft in a manner of being capable of being driven to slide in the axial direction in a circumferential transmission manner and being meshed with or separated from the driven gear; the centrifugal swinging block is hinged on a hinge seat which follows the transmission shaft in a radial swinging way, and forms radial swinging to drive the thrust piece to overcome the pretightening force to slide towards the direction of the driven gear and be meshed with the driven gear under the action of the rotating centrifugal force of the transmission shaft; under the condition of larger load and inertia of the engine, the engine can present an unloading state when the engine is suddenly stopped in high-speed operation or slips backwards on a steep slope, and when the phenomenon of 'back dragging' occurs, a transmission chain is disconnected among the duplicate gears, so that the gears, the starting motor and the overrunning clutch of the whole electric starting system cannot be damaged, and the protection function is realized; when the system is used, the pre-tightening force can be set according to actual requirements to control the meshing rotating speed, so that the system can return to and disengage from the meshing in time when the rotating speed is low or the system is static, and a system gear, a starting motor and an overrunning clutch are protected.
Description
Technical Field
The invention relates to an auxiliary component of an engine, in particular to a centrifugal gear assembly of a throwing block, a duplicate gear and the engine.
Background
Electric starting of motor vehicle engines is a more commonly used structure; the principle is that the starting motor rotates to sequentially drive the electric starting duplicate gear, the electric starting gap bridge gear, the disk gear, the starting clutch, the magneto spindle and the crankshaft to rotate, and the starting operation of the engine is completed. For a small vehicle with a large displacement, when an engine is suddenly stopped or slips backwards on a steep slope during high-speed operation, the inertia is relatively large under the condition of a large load, the engine reversely drags an electric starting system to operate, an overrunning clutch is suddenly stressed excessively and damaged, and teeth of an electric starting duplicate gear and an electric starting intermediate gear are broken after strong impact. In the practical use process, the large-displacement (more than 200 displacement) tricycle engine has the fault phenomena of tooth breakage of an electric starting duplicate gear, damage of a starting motor and damage of an overrunning clutch.
Therefore, there is a need for an improvement of the existing electric starting structure of the engine, the unloading of the engine is realized when the engine runs backward on a steep slope after suddenly stopping during high-speed operation, and under the condition of larger load and inertia, the gear, the starting motor and the overrunning clutch of the whole electric starting system are not damaged by reverse dragging.
Disclosure of Invention
In view of the above, the present invention provides a centrifugal gear assembly, a dual gear and an engine, wherein the engine is unloaded when suddenly decelerated or stopped during high-speed operation, and under the condition of large load and inertia, the gears and the clutch of the whole electric starting system are not damaged by reverse dragging.
The centrifugal gear assembly of the flail block of the invention comprises a transmission shaft, a driven gear, a thrust piece and a centrifugal flail block; the driven gear is in running fit with the transmission shaft in a sleeved mode, and the thrust piece is sleeved on the transmission shaft in a mode that the thrust piece can be driven to slide in the axial direction in a circumferential direction and can be meshed with or separated from the driven gear; the thrust piece is also applied with pretightening force which is deviated from the driven gear; the circumferential transmission axial slidable matching mode generally adopts a spline structure or a similar transmission structure, and the aim of the invention can be achieved;
the centrifugal throw block is hinged on a hinge seat which follows the transmission shaft in a radial swinging mode, the centrifugal throw block forms radial swinging under the action of the rotating centrifugal force of the transmission shaft, and the radial swinging drives the thrust piece to overcome the pretightening force, slide towards the direction of the driven gear and be meshed with the driven gear; the radial swing refers to the swing direction along the radial direction of the transmission shaft to swing outwards or inwards, the optimal structure form is that the swing is directly formed along the direction of the centrifugal force, and the structure moves smoothly and sensitively; in the structure, the centrifugal throwing block is arranged in a radial inclined manner, when the centrifugal throwing block swings in a radial direction, in order to compensate the occupied axial length of the centrifugal throwing block, the thrust piece is pushed to slide along the axial direction and is meshed with the driven gear to form transmission, so that starting is completed, the transmission shaft stops rotating after the starting is completed, the thrust of the centrifugal throwing block disappears, the thrust piece returns under the action of a pretightening force, a transmission chain is disconnected, unloading is realized when an engine is suddenly stopped during high-speed operation or runs backwards on a steep slope, and gears, a starting motor and an overrunning clutch of the whole electric starting system cannot be damaged due to back dragging;
the following characteristics of the hinged seat and the transmission shaft are generally axial fixation and circumferential transmission, can be realized by adopting the existing mechanical connection means, and can also be integrally formed, and are not described again; the radial direction of the invention refers to the radial direction of the transmission shaft, and the description is omitted.
Furthermore, the thrust piece is a push disc with a disc-shaped structure, the centrifugal throwing blocks are uniformly distributed along the circumferential direction, and the stress uniformity can be ensured by adopting the structure of the push disc and the uniformly distributed centrifugal throwing blocks, so that the sensitivity of the whole gear assembly is higher; the centrifugal swing block is multiple, and the hinged seat is multiple, which is not described herein again.
Furthermore, the pre-tightening force is exerted by a cylindrical spring, the cylindrical spring is positioned between the driven gear and the push disc, one end of the cylindrical spring is propped against the push disc, the other end of the cylindrical spring is propped against the other end of the cylindrical spring, and the centrifugal swinging block is positioned on one side of the push disc, which is opposite to the cylindrical spring; the other end can be supported by the existing mechanical structure, such as a special supporting pin, or directly supported by the driven gear, and the like, which is not described herein again; as shown in the figure, the cylindrical spring is sleeved on the transmission shaft through a central shaft sleeve-shaped support formed on the push disc, so that the whole structure is simple and compact, and the stress is uniform.
Furthermore, the two axial sides of the driven gear on the transmission shaft are respectively provided with a limit ring for axially limiting the driven gear, and the two axial side ends of the driven gear are respectively provided with a sinking groove for axially accommodating the limit rings, so that the axial size is compact; as shown in the figure, the limiting ring at the end part is integrally formed with the transmission shaft, and the limiting ring at the inner side is of a detachable structure.
Furthermore, an annular sinking groove for accommodating the columnar spring is formed in the middle of the pushing disc, a shaft sleeve-shaped support is formed in the center of the annular sinking groove, and the pushing disc is sleeved on the transmission shaft in a manner that the pushing disc can be driven to slide in the axial direction in a circumferential transmission mode through the shaft sleeve-shaped support; the cylindrical spring is sleeved outside the shaft sleeve-shaped support, one end of the cylindrical spring props against the corresponding limiting ring or the corresponding gear, and the other end of the cylindrical spring props against the groove bottom of the annular sinking groove; the shaft sleeve-shaped support is used for supporting the columnar spring, the whole structure is compact and stable, the spring is prevented from deviating after being compressed for many times, meanwhile, the matching length of the push disc and the transmission shaft can be prolonged, and the stability of axial sliding is guaranteed; in order to ensure that the meshing with the driven gear is not interfered, the end part of the shaft sleeve-shaped support is lower than the meshing end part of the push disc, so that the weight of the push disc is reduced, and the detailed description is omitted.
Further, the gravity center of the centrifugal swing block is located outside the hinge point, and the end part of the inner side of the centrifugal swing block inclines outwards along the radial direction relative to the end part of the outer side of the centrifugal swing block; as shown in the figure, the center of gravity is located outside the hinge point, the outer side part is thrown to the radial outer side under the action of centrifugal force, the inner side end part moves to the radial inner side, and due to the inclined arrangement, the pushing disc is pushed to move to the driven gear by the movement; certainly, the center of gravity can also be arranged on the inner side of the hinge point, but the end part of the inner side of the centrifugal throwing block is close to the radial inner side at the moment, and swings to the radial outer side under the action of centrifugal force to complete the driving of the pushing disc, so that the aim of the invention can be achieved.
Furthermore, the end part of the centrifugal throwing block, which is in contact with the push disc, is an approximately arc-shaped smooth transition surface, so that the movement driving stability is good; the meshing transmission mode between the driven gear and the push disc is end face ratchet meshing transmission, meshing or separation is directly formed, the structure is simple, the processing is easy, meanwhile, the end face ratchet structure is a structure with one side face being a meshing face and the other side face being an inclined face, and the end face ratchet structure is easy to separate when rotating reversely, so that the thoroughness of separation is ensured, and the effective disconnection of a transmission chain is further ensured.
The invention also discloses a duplicate gear which comprises a driving gear and the throwing block centrifugal gear assembly, wherein the driving gear is arranged on the transmission shaft in a transmission fit manner.
Furthermore, an axial through groove is formed in the driving gear to form the hinge seat, and the centrifugal throwing block penetrates through the axial through groove to form a hinge, so that one end of the centrifugal throwing block props against the push disc after the centrifugal throwing block is hinged; in the structure, the hinge seat is directly formed on the driving gear, so that the whole structure forms a dual gear structure, the structure is simple and compact, and redundant parts are not needed; the axial through groove is directly formed in the driving gear, so that the weight of the gear can be reduced, and the transmission capacity of torque can be increased; as shown in the figure, the centrifugal throwing block is hinged between the two transverse sides of the axial through groove and is formed by arranging a plurality of throwing pieces side by side, and the centrifugal throwing block can be added or removed as required to achieve the purpose of adjusting the centrifugal force, so that the thrust to the pushing disc is adjusted.
The invention also discloses an engine, and a starting system of the engine is provided with the duplicate gear; the starting power is input by the driving gear, so that the starting process is completed.
The invention has the beneficial effects that: the centrifugal gear assembly, the duplicate gear and the engine of the invention adopt a structure that the centrifugal throwing block controls the meshing transmission, and are disengaged after the transmission shaft stops, under the condition of larger load and inertia of the engine, the engine can be in an unloading state when suddenly stopping at high speed or sliding backwards on a steep slope, and when the phenomenon of 'back dragging' occurs, the transmission chain is disconnected among the duplicate gears, so that the gear, the starting motor and the overrunning clutch of the whole electric starting system can not be damaged, and the invention has the protection function; when the system is used, the pre-tightening force can be set according to actual requirements to control the meshing rotating speed, so that the system can return to and disengage from the meshing in time when the rotating speed is low or the system is static, and a system gear, a starting motor and an overrunning clutch are protected.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is an outline view of the present invention.
Detailed Description
Fig. 1 is a schematic structural diagram of the present invention, and fig. 2 is an external diagram of the present invention, as shown in the figure: the centrifugal gear assembly of the flail block of this embodiment, including drive shaft 1, driven gear 2, thrust piece and centrifugal flail block 4; the driven gear 2 is rotationally matched and sleeved on the transmission shaft 1, and the thrust piece is sleeved on the transmission shaft in a manner that the thrust piece can be driven to slide in the axial direction in a circumferential direction and can be meshed with or separated from the driven gear; the thrust piece 3 is also applied with pretightening force which is opposite to the driven gear; the circumferential transmission axial slidable matching mode generally adopts a spline structure or a similar transmission structure, and the aim of the invention can be achieved;
the centrifugal throw block 4 is hinged on a hinge seat following the transmission shaft 1 in a radial swinging mode, the centrifugal throw block 4 forms radial swinging under the action of the rotating centrifugal force of the transmission shaft 1, and the radial swinging drives the thrust piece to overcome the pretightening force to slide towards the direction of the driven gear 2 and to be meshed with the driven gear 2; the radial swing refers to the swing direction swinging outwards or inwards along the radial direction of the transmission shaft 1, the optimal structure form is that the swing is directly formed along the direction of the centrifugal force, and the structure moves smoothly and sensitively; in the structure, the centrifugal throwing block is arranged in a radial inclined manner, when the centrifugal throwing block swings in a radial direction, in order to compensate the occupied axial length of the centrifugal throwing block, the thrust piece is pushed to slide along the axial direction and is meshed with the driven gear to form transmission, so that starting is completed, the transmission shaft stops rotating after the starting is completed, the thrust of the centrifugal throwing block disappears, the thrust piece returns under the action of a pretightening force, a transmission chain is disconnected, unloading is realized when an engine is suddenly decelerated or stopped during high-speed operation, and gears and a clutch of the whole electric starting system cannot be damaged due to back dragging;
the following characteristics of the hinged seat and the transmission shaft 1 are generally axial fixation and circumferential transmission, can be realized by adopting the existing mechanical connection means, and can also be integrally formed, and are not described again; the radial direction of the invention refers to the radial direction of the transmission shaft, and the description is omitted.
In this embodiment, the thrust member is a push disk 3 with a disk-shaped structure, the centrifugal thrower 4 is a plurality of centrifugal thrower blocks and is uniformly distributed along the circumferential direction, and the structure of the push disk 3 and the uniformly distributed centrifugal thrower blocks can ensure the uniformity of stress, so that the sensitivity of the whole gear assembly is higher; the centrifugal swing block is multiple, and the hinged seat is multiple, which is not described herein again.
In this embodiment, the pre-tightening force is applied by a cylindrical spring 5, the cylindrical spring 5 is located between the driven gear 2 and the push disc, one end of the cylindrical spring 5 abuts against the push disc 3, the other end of the cylindrical spring is abutted against, and the centrifugal thrower 4 is located on one side of the push disc 3 opposite to the cylindrical spring 5; the other end can be supported by the existing mechanical structure, such as a special supporting pin, or directly supported by the driven gear, and the like, which is not described herein again; as shown in the figure, the cylindrical spring is sleeved on the transmission shaft through a central shaft sleeve formed on the push disc, so that the whole structure is simple and compact, and the stress is uniform.
In this embodiment, the two axial sides of the driven gear 2 on the transmission shaft 1 are respectively provided with a limiting ring for axially limiting the driven gear 2, and the two axial sides of the driven gear 2 are respectively provided with a sinking groove for axially accommodating the limiting ring, so that the axial size is compact; as shown in the figure, the limiting ring 7 at the end is integrally formed with the transmission shaft 1, the limiting ring 6 at the inner side is a detachable structure, and a clamping groove can be arranged on the transmission shaft, and the limiting ring 6 is embedded in the clamping groove, which is not described herein again.
In this embodiment, an annular sinking groove for accommodating the cylindrical spring 5 is formed in the middle of the pushing disc 3, a shaft sleeve-shaped support is formed in the center of the annular sinking groove, and the pushing disc 3 is sleeved on the transmission shaft 1 in a manner that the pushing disc can be driven to slide in the axial direction in the circumferential direction through the shaft sleeve-shaped support; the cylindrical spring is sleeved outside the shaft sleeve-shaped support, one end of the cylindrical spring props against the corresponding limiting ring or the corresponding gear, and the other end of the cylindrical spring props against the groove bottom of the annular sinking groove; the shaft sleeve-shaped support is used for supporting the columnar spring, the whole structure is compact and stable, the deviation of the spring after multiple compression is avoided, meanwhile, the matching length of the push disc and the transmission shaft can be prolonged by the shaft sleeve-shaped support, and the stability of axial sliding is ensured; in order to ensure that the meshing with the driven gear is not interfered, the end part of the shaft sleeve-shaped support is lower than the meshing end part of the push disc, so that the weight of the push disc is reduced, and the detailed description is omitted.
In this embodiment, the center of gravity of the centrifugal swing block 4 is located outside the hinge point, and the inner end is inclined radially outward relative to the outer end; as shown in the figure, the center of gravity is located outside the hinge point, the outer side part is thrown to the radial outer side under the action of centrifugal force, the inner side end part moves to the radial inner side, and due to the inclined arrangement, the pushing disc is pushed to move to the driven gear by the movement; certainly, the center of gravity can also be arranged on the inner side of the hinge point, but the end part of the inner side of the centrifugal throwing block is close to the radial inner side at the moment, and swings to the radial outer side under the action of centrifugal force to complete the driving of the pushing disc, so that the aim of the invention can be also fulfilled; the outer side of the hinge point refers to the side axially facing away from the push disk, while the side facing the push disk is the inner side, which is not described in detail herein.
In the embodiment, the end part of the centrifugal swing block 4, which is contacted with the push disc 3, is an approximately arc-shaped smooth transition surface, so that the motion driving stability is good; the meshing transmission mode between the driven gear 2 and the push disc 3 is end face ratchet meshing transmission, meshing or separation is directly formed, the structure is simple, the processing is easy, meanwhile, the end face ratchet structure is a structure with one side face being a meshing face and the other side face being an inclined face, separation is easily formed during reverse rotation, the thoroughness of separation is guaranteed, and effective disconnection of a transmission chain is further guaranteed.
The invention also discloses a duplicate gear, which comprises a driving gear 8 and the throwing block centrifugal gear assembly, wherein the driving gear 8 is arranged on the transmission shaft 1 in a transmission matching way, and the matching relation between the driving gear and the transmission shaft can be a spline, a flat key or an integrally formed structure, so that the details are not repeated.
In this embodiment, an axial through groove is formed in the driving gear 9 to form the hinge seat, and the centrifugal thrower 4 passes through the axial through groove to form a hinge, and then one end of the hinge abuts against the push disc 3; in the structure, the hinge seat is directly formed on the driving gear, so that the whole structure forms a dual gear structure, the structure is simple and compact, and redundant parts are not needed; the axial through groove is directly formed in the driving gear, so that the self weight of the gear can be reduced, and the transmission capacity of torque can be increased; as shown in the figure, the centrifugal throwing block 4 is hinged between the two transverse sides of the axial through groove, and the centrifugal throwing block 4 is formed by arranging a plurality of throwing pieces side by side and can be added or removed as required to achieve the purpose of adjusting the centrifugal force, so that the thrust to the push disc is adjusted.
The invention also discloses an engine, and a starting system of the engine is provided with the duplicate gear; the starting power is input by the driving gear, and therefore the starting process is completed.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. A dual gear employing a flail block centrifugal gear assembly, characterized in that: comprises a transmission shaft, a driven gear, a driving gear, a thrust piece and a centrifugal throwing block; the driven gear is sleeved on the transmission shaft in a rotating fit manner, and the thrust piece is sleeved on the transmission shaft in a manner that the thrust piece can be transmitted in the circumferential direction and can be driven to slide in the axial direction to be meshed with or separated from the driven gear; the thrust piece is also applied with pretightening force which is deviated from the driven gear;
the centrifugal swing block is hinged on a hinge seat which follows the transmission shaft in a radial swinging mode, the centrifugal swing block forms radial swinging under the action of the rotating centrifugal force of the transmission shaft, and the radial swinging drives the thrust piece to overcome the pretightening force, slide towards the direction of the driven gear and be meshed with the driven gear;
the driving gear is arranged on the transmission shaft in a transmission matching manner; an axial through groove is formed in the driving gear to form the hinge seat, and the centrifugal throwing block penetrates through the axial through groove to form a hinge joint, and one end of the centrifugal throwing block props against the thrust piece;
the centrifugal throwing block is hinged between the two transverse sides of the axial through groove and is formed by arranging a plurality of throwing sheets side by side.
2. A duplicate gear employing a flail centrifugal gear assembly as claimed in claim 1 wherein: the thrust piece is a push disc with a disc-shaped structure, and the centrifugal thrower blocks are multiple and are uniformly distributed along the circumferential direction.
3. A duplicate gear employing a flail centrifugal gear assembly as claimed in claim 2 wherein: the pre-tightening force is exerted by a columnar spring, the columnar spring is positioned between the driven gear and the push disc, one end of the columnar spring is propped against the push disc, the other end of the columnar spring is propped against the other end of the columnar spring, and the centrifugal swinging block is positioned on one side of the push disc, which is opposite to the columnar spring.
4. A dual gear employing a flail centrifugal gear assembly according to claim 3, wherein: the axial two sides of the driven gear on the transmission shaft are respectively provided with a limiting ring for limiting the axial direction of the driven gear, and the axial two side ends of the driven gear are respectively provided with a sinking groove for containing the limiting ring in the axial direction.
5. A dual gear employing a flail centrifugal gear assembly according to claim 4, wherein: an annular sinking groove for accommodating the columnar spring is formed in the middle of the push disc, a shaft sleeve-shaped support is formed in the center of the annular sinking groove, and the push disc is sleeved on the transmission shaft in a manner that the push disc can be driven to slide in the axial direction in a transmission manner in the circumferential direction through the shaft sleeve-shaped support; the columnar spring is sleeved outside the shaft sleeve-shaped support, one end of the columnar spring props against the corresponding limiting ring or the corresponding gear, and the other end of the columnar spring props against the groove bottom of the annular sinking groove.
6. A dual gear employing a flail centrifugal gear assembly according to claim 5, wherein: the gravity center of the centrifugal swing block is located outside the hinge point, and the inner side end portion inclines outwards along the radial direction relative to the outer side end portion.
7. A dual gear employing a flail centrifugal gear assembly according to claim 5, wherein: the end part of the centrifugal throwing block, which is contacted with the push disc, is a smooth transition surface similar to an arc; the driven gear and the push disc are in end face ratchet wheel meshing transmission.
8. An engine, characterized in that: the starting system of the engine is provided with the duplicate gear of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010865673.9A CN112049746B (en) | 2020-08-25 | 2020-08-25 | Adopt duplex gear and engine of centrifugal gear assembly of flail piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010865673.9A CN112049746B (en) | 2020-08-25 | 2020-08-25 | Adopt duplex gear and engine of centrifugal gear assembly of flail piece |
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| Publication Number | Publication Date |
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| CN112049746A CN112049746A (en) | 2020-12-08 |
| CN112049746B true CN112049746B (en) | 2022-11-08 |
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| CN202010865673.9A Active CN112049746B (en) | 2020-08-25 | 2020-08-25 | Adopt duplex gear and engine of centrifugal gear assembly of flail piece |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0835472A (en) * | 1994-07-22 | 1996-02-06 | Sanshin Ind Co Ltd | Engine starter |
| CN2791350Y (en) * | 2005-05-31 | 2006-06-28 | 宋战修 | Centrifugal control mechanism in press-piece type automatic clutch |
| CN206158907U (en) * | 2016-08-30 | 2017-05-10 | 重庆隆鑫发动机有限公司 | Engine start device and engine thereof |
| CN106704408B (en) * | 2016-12-28 | 2023-07-21 | 四川省机械研究设计院(集团)有限公司 | Controllable mechanical soft start system and method |
| CN109139324A (en) * | 2018-10-22 | 2019-01-04 | 力帆实业(集团)股份有限公司 | A kind of motorcycle engine electric startup structure |
| CN109973276A (en) * | 2019-03-07 | 2019-07-05 | 重庆隆鑫发动机有限公司 | Engine starting system and engine |
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