CN110206868B - Gear assembly and engine - Google Patents
Gear assembly and engine Download PDFInfo
- Publication number
- CN110206868B CN110206868B CN201910580893.4A CN201910580893A CN110206868B CN 110206868 B CN110206868 B CN 110206868B CN 201910580893 A CN201910580893 A CN 201910580893A CN 110206868 B CN110206868 B CN 110206868B
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- Prior art keywords
- gear
- elastic arm
- limiting
- limit
- limit groove
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- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000003754 machining Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
- F16H2057/126—Self-adjusting during operation, e.g. by a spring
- F16H2057/127—Self-adjusting during operation, e.g. by a spring using springs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention relates to the technical field of engines, in particular to a gear assembly and an engine. When the gear is matched with the meshed gear, transmission impact caused by the existence of a reserved gear clearance during gear processing can be eliminated, so that the gear is more stably driven, impact sound formed by impact transmission in a related mechanism is avoided, the noise of an engine is reduced, and the comfort of the whole vehicle is improved. The transmission of the internal gear assembly of the engine is more stable, so that the impact sound formed by the impact transmission of the internal gear of the engine in the meshing process is avoided, the noise of the engine is reduced, and the comfort of the whole vehicle is improved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a gear assembly and an engine.
Background
The engine is a traditional power source of an automobile, and an air compressor mounted on the engine can provide high-pressure air for braking, opening and closing a door and the like of the automobile. The engine body of the engine is fixed with a gear train, and the gear train provides kinetic energy for parts such as an air compressor through the meshing transmission of a group of gears. In theory, the gear engagement is smooth and stable, no tooth-direction backlash exists, but due to the fact that the gear is heated and expanded in the transmission process, errors exist in actual machining and assembly, and the like, proper tooth-direction backlash is reserved in a manual adjustment mode when the gear is machined, so that gear tooth surface interference and even clamping during working due to thermal expansion, eccentric installation and the like are avoided, and transmission failure is caused. Because there is the tooth to the backlash between the teeth of the gear pair, the pair of teeth of the gear can produce the impact when getting into the meshing, and this kind of impact passes through the gear and transmits to the working shaft of air compressor machine and causes the air compressor machine to send regular impact sound at the during operation, has increased the noise of engine, has influenced the travelling comfort of whole car.
Accordingly, there is a need for a gear assembly that solves the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a gear assembly and an engine, which can generate less noise during working and have long service life.
To achieve the purpose, the invention adopts the following technical scheme:
there is provided a gear assembly comprising:
a first gear;
the number of teeth and the modulus of the second gear are the same as those of the first gear, and the first gear and the second gear are coaxially connected;
the limiting mechanism comprises an elastic piece, wherein the elastic piece comprises a first elastic arm, a second elastic arm and an elastic arm fixing part, one end of the elastic arm fixing part is provided with the first elastic arm, the other end of the elastic arm fixing part is provided with the second elastic arm, the first elastic arm is arranged on a first gear, and the second elastic arm is arranged on a second gear, so that gear teeth of the first gear and gear teeth of the second gear are staggered by a preset angle;
when the first gear and the second gear are meshed with the same gear, the staggered angle of the first gear and the second gear is smaller than or equal to a preset angle.
As a preferable technical solution of the gear assembly, the elastic arm fixing portion is an elastic body or a screw body.
As a preferable technical scheme of the gear assembly, a first limit groove is formed in one side, close to the second gear, of the first gear, a second limit groove is formed in one side, close to the first gear, of the second gear, the first limit grooves correspond to the second limit grooves one by one, the first elastic arms extend into the first limit grooves and are abutted to the groove walls of the first limit grooves, the second elastic arms extend into the second limit grooves and are abutted to the groove walls of the second limit grooves, and the elastic arm fixing parts are arranged in cavities formed by the first limit grooves and the second limit grooves.
As a preferable technical scheme of the gear assembly, the limiting mechanism further comprises a limiting pin, limiting pin holes are formed in the bottoms of the first limiting grooves and the second limiting grooves, and the limiting pin stretches into the limiting pin holes to penetrate through the elastic arm fixing portion, the first gear and the second gear.
As a preferable technical scheme of the gear assembly, a plurality of first limit grooves are formed in the first gear, a plurality of second limit grooves are formed in the first gear, and the first limit grooves and the second limit grooves are in one-to-one correspondence.
As a preferable technical scheme of the gear assembly, a plurality of first limit grooves are circumferentially and uniformly distributed on the fluted disc of the first gear, and a plurality of second limit grooves are circumferentially and uniformly distributed on the fluted disc of the second gear.
As a preferable technical scheme of the gear assembly, a first positioning hole is formed in the first gear, a second positioning hole is formed in the second gear, and the first positioning hole and the second positioning hole are used for installing and pre-positioning the first gear and the second gear.
As a preferable technical scheme of the gear assembly, in a natural state, an included angle between the first elastic arm and the second elastic arm is larger than an included angle between the length extending direction of the first limit groove and the length extending direction of the second limit groove.
As a preferable technical scheme of the gear assembly, a boss is arranged on the fluted disc of the first gear around the shaft hole, and the fluted disc of the second gear is clamped on the boss.
The invention also provides an engine comprising the gear assembly.
The invention has the beneficial effects that:
because the first gear and the second gear teeth are arranged in a staggered manner, the gear direction gap reserved in processing is eliminated when the gear pair moves in a matched manner, when the gear teeth are expanded by heating, the first elastic arm and the second elastic arm can rotate relatively at a small angle, the tooth surfaces of the gear teeth of the formed gear assembly can be stressed to generate an overlapping effect, the tooth thickness of the composite gear is reduced, the gear is prevented from being clamped, namely, the staggered angle of the first gear and the second gear in the transmission process is meshed with the same transmission gear according to a preset angle smaller than or equal to the preset angle. When the gear component is matched with the meshed gears, transmission impact caused by the existence of reserved gear direction gaps during gear processing can be eliminated, so that the transmission of the gear component is more stable, impact sound formed by impact transmission inside related mechanisms is avoided, noise of an engine is reduced, and the comfort of the whole vehicle is improved.
The transmission of the internal gear assembly of the engine is more stable, so that the impact sound formed by the impact transmission of the internal gear of the engine in the meshing process is avoided, the noise of the engine is reduced, and the comfort of the whole vehicle is improved.
Drawings
FIG. 1 is a schematic diagram of a gear assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an elastic member according to an embodiment of the present invention;
FIG. 3 is a schematic view of another structure of an elastic member according to an embodiment of the present invention;
FIG. 4 is a schematic view of the two elastic arms of the elastic member according to the embodiment of the present invention in a natural state;
FIG. 5 is a cross-sectional view of a gear assembly provided by an embodiment of the present invention;
FIG. 6 is an exploded schematic view of a gear assembly provided by an embodiment of the present invention;
FIG. 7 is a schematic view of the position of the first and second limiting grooves in the natural state according to the embodiment of the present invention;
FIG. 8 is a schematic view of a first gear according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a second gear according to an embodiment of the present invention.
In the figure:
1. a first gear; 11. a first limit groove; 12. a first positioning hole; 13. a boss;
2. a second gear; 21. the second limit groove; 22. a second positioning hole;
3. the method comprises the steps of carrying out a first treatment on the surface of the An elastic member; 31. a first elastic arm; 32. a second elastic arm; 33. an elastic arm fixing part;
4. a limiting pin;
5. limiting pin holes;
6. and (5) positioning pins.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The embodiment provides a gear assembly, which can reduce noise generated by meshing with other gears in an operating state, and the service life of the gear assembly is longer than that of the existing noise reduction gears.
As shown in fig. 1, the gear assembly comprises a first gear 1, a second gear 2 and a limiting mechanism, wherein the number of teeth and the modulus of the first gear 1 are the same as those of the second gear 2, the first gear 1 and the second gear 2 are coaxially connected, and in a natural state, the teeth of the first gear 1 and the teeth of the second gear 2 are staggered by a preset angle; the first gear 1 and the second gear 2 are kept staggered by a preset angle under the action of the limiting mechanism, and when the first gear 1 and the second gear 2 are meshed with the same gear, transmission impact caused by the existence of a reserved gear gap during gear machining can be eliminated, so that the transmission of the gears is more stable.
It should be noted that, the preset angle may enable the gear-to-gear gap between the first gear 1 and the second gear 2 to be slightly larger than the gear-to-gear gap reserved in the prior art when the gears are machined, and the staggered gap may be equal to the gear-to-gear gap reserved in the process of machining the gears.
One side that first gear 1 and second gear 2 contacted each other all is provided with the recess, and a cavity is constituteed jointly to two recesses, and spacing subassembly sets up in the cavity to take place delay engagement's phenomenon when realizing first gear 1 and second gear 2 and same gear engagement, avoid the gear to block when the gear is heated expansion.
As shown in fig. 2-4, the limiting and limiting mechanism comprises an elastic piece 3, wherein the elastic piece 3 comprises a first elastic arm 31 and a second elastic arm 32, the first elastic arm 31 is arranged on the first gear 1, and the second elastic arm 32 is arranged on the second gear 2; in the process of meshing the first gear 1 and the second gear 2, the first elastic arm 31 and the second elastic arm 32 have elasticity, so that a preset angle for offset between the first gear 1 and the second gear 2 can be offset, and when the first gear 1 and the second gear 2 are meshed with the same gear, the offset angle of the first gear 1 and the second gear 2 is smaller than or equal to the preset angle. I.e. the offset angle of the first gear 1 and the second gear 2 is continuously changed between the preset angle and 0.
In order to fix the first elastic arm 31 and the second elastic arm 32 and prevent the first elastic arm 31 and the second elastic arm 32 from moving in the cavity formed by the first grooves, in this embodiment, the limiting mechanism further includes an elastic arm fixing portion 33, one end of the elastic arm fixing portion 33 is provided with the first elastic arm 31, the other end is provided with the second elastic arm 32, and the elastic arm fixing portion 33 is located in the cavity formed by the two grooves. Illustratively, the resilient arm-securing portion 33 is an elastomer or a screw. The elastic arm fixing portion 33, the first elastic arm 31 and the second elastic arm 32 are of an integral structure, and the elastic member 3 is made of metal, so that the gear can be prevented from being aged and broken in a high-temperature environment as compared with rubber. In the present embodiment, the elastic arm fixing portion, the first elastic arm 31 and the second elastic arm 32 are integrally formed, so that the three are made of the same material and are made of metal materials, and of course, may be made of plastic in other embodiments.
As shown in fig. 5-9, the groove includes a first limit groove 11 and a second limit groove 21, a first limit groove 11 is disposed on a side of the first gear 1 close to the second gear 2, a second limit groove 21 is disposed on a side of the second gear 2 close to the first gear 1, and the first limit groove 11 and the second limit groove 21 are in one-to-one correspondence, that is, each first limit groove 11 corresponds to one second limit groove 21. The first limiting groove 11 and the second limiting groove 21 are further provided with limiting pin holes 5 near the axle center of the gear, the first elastic arm 31 stretches into the first limiting groove 11 and is in butt joint with the groove wall of the first limiting groove 11, the second elastic arm 32 stretches into the second limiting groove 21 and is in butt joint with the groove wall of the second limiting groove 21, and the elastic arm fixing part 33 is arranged in a cavity formed by the first limiting groove 11 and the second limiting groove 21.
It should be noted that, in both the first gear 1 and the second gear 2, the limit pin hole 5 provided on one of them can enable the limit pin 4 to be inserted therein, and the limit pin hole 5 provided on the other one can enable the limit pin 4 to move/move therein, thereby realizing the relative rotation of the first gear 1 and the second gear 2.
Preferably, the plurality of first limiting grooves 11 are circumferentially and uniformly distributed on the fluted disc of the first gear 1, and the plurality of second limiting grooves 21 are circumferentially and uniformly distributed on the fluted disc of the second gear 2. The purpose of providing the plurality of first limit grooves 11 and the plurality of second limit grooves 21 is to enable the first gear 1 and the second gear 2 to receive uniform resistance force at all positions, so that the synchronization of all positions of the first gear 1 and the staggering angle of the second gear 2 are the same.
In order to prevent the elastic arm fixing portion 33 from shifting, as a preferred mode, the limiting mechanism further comprises a plurality of limiting pins 4, limiting pin holes 5 are formed in the groove walls of the first limiting groove 11 and the second limiting groove 21, the limiting pins 4 extend into the limiting pin holes 5 and penetrate through the elastic arm fixing portion 33, the first gear 1 and the second gear 2 to limit the elastic arm fixing portion 33, position jumping is prevented from occurring in the working process of the first gear 1 and the second gear 2, the first gear 1 and the second gear 2 are caused to shift, the first gear 1 and the second gear 2 can be guaranteed to be meshed with the same gear smoothly, and normal work is achieved.
In order to ensure that the first gear 1 and the second gear 2 are convenient to install, in this embodiment, the first gear 1 is provided with a first positioning hole 12, the second gear 2 is provided with a second positioning hole 22, and when the installation is completed, the positioning pin 6 penetrates through the first positioning hole 12 and the second positioning hole 22, and after the installation is completed, the positioning pin 6 is directly pulled out.
It should be noted that, in a natural state, the angle β between the first elastic arm 31 and the second elastic arm 32 is equal to the angle α between the length extending direction of the first limiting groove 11 and the length extending direction of the second limiting groove 21.
In order to connect the first gear 1 and the second gear 2, in the preferred embodiment, a boss 13 is disposed on the fluted disc of the first gear 1 around the shaft hole, and the fluted disc of the second gear 2 is clamped on the boss 13.
Because the gear teeth of the first gear 1 and the second gear 2 are arranged in a staggered manner, the gear direction gap reserved in processing is eliminated when the gear pair moves in a matched manner, when the gear teeth are expanded by heating, the first elastic arm 31 and the second elastic arm 32 can rotate relatively at a small angle, the tooth surfaces of the gear teeth of the gear assembly can bear force to generate a superposition effect, the tooth thickness of the gear assembly is reduced, and the gear is prevented from being clamped, namely, the staggered angle of the first gear 1 and the second gear 2 is meshed with the same transmission gear according to a preset angle less than or equal to the preset angle in the transmission process. When the gear is matched with the meshed gear, transmission impact caused by the existence of a reserved gear clearance during gear processing can be eliminated, so that the gear is more stably driven, impact sound formed by impact transmission in a related mechanism is avoided, the noise of an engine is reduced, and the comfort of the whole vehicle is improved.
The present embodiment also provides an engine including the gear assembly provided in the present embodiment. In the working process, the gear assembly can eliminate transmission impact caused by the existence of a reserved gear gap during gear machining, so that the transmission of the gears is more stable, the impact sound formed by the impact transmission of the gears in the engine in the meshing process is avoided, the noise of the engine is reduced, and the comfort of the whole vehicle is improved.
Furthermore, the foregoing description of the preferred embodiments and the principles of the invention is provided herein. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A gear assembly, comprising:
a first gear (1);
the number of teeth and the modulus of the second gear (2) are the same as those of the first gear (1), and the first gear (1) and the second gear (2) are coaxially connected;
the limiting mechanism comprises an elastic piece, wherein the elastic piece comprises a first elastic arm (31), a second elastic arm (32) and an elastic arm fixing part (33), one end of the elastic arm fixing part (33) is provided with the first elastic arm (31), the other end of the elastic arm fixing part is provided with the second elastic arm (32), the first elastic arm (31) is arranged on the first gear (1), and the second elastic arm (32) is arranged on the second gear (2) so that gear teeth of the first gear (1) and gear teeth of the second gear (2) are staggered by a preset angle;
when the first gear (1) and the second gear (2) are meshed with the same gear, the staggered angle is smaller than or equal to a preset angle;
a first limit groove (11) is formed in one side, close to the second gear (2), of the first gear (1), a second limit groove (21) is formed in one side, close to the first gear (1), of the second gear (2), a first elastic arm (31) stretches into the first limit groove (11) and is abutted to the groove wall of the first limit groove (11), a second elastic arm (32) stretches into the second limit groove (21) and is abutted to the groove wall of the second limit groove (21), and an elastic arm fixing part (33) is arranged in a cavity formed by the first limit groove (11) and the second limit groove (21);
the limiting mechanism further comprises a limiting pin (4), limiting pin holes (5) are formed in the bottoms of the first limiting grooves (11) and the second limiting grooves (21), and the limiting pin (4) stretches into the limiting pin holes (5) to penetrate through the elastic arm fixing portions (33) and the first gear (1) and the second gear (2).
2. Gear assembly according to claim 1, characterized in that the elastic arm fixing part (33) is an elastomer or a screw.
3. The gear assembly according to claim 1, wherein a plurality of the first limit grooves (11) are provided on the first gear (1), a plurality of the second limit grooves (21) are provided on the second gear (2), and the first limit grooves (11) and the second limit grooves (21) are in one-to-one correspondence.
4. A gear assembly according to claim 3, wherein a plurality of the first limiting grooves (11) are circumferentially and uniformly distributed on the toothed disc of the first gear (1), and a plurality of the second limiting grooves (21) are circumferentially and uniformly distributed on the toothed disc of the second gear (2).
5. A gear assembly according to claim 3 or 4, characterized in that the first gear (1) is provided with a first positioning hole (12) and the second gear (2) is provided with a second positioning hole (22), the first positioning hole (12) and the second positioning hole (22) being used for mounting the first gear (1) and the second gear (2).
6. A gear assembly according to claim 3 or 4, characterized in that the angle between the first elastic arm (31) and the second elastic arm (32) in the natural state is equal to the angle between the length extension direction of the first limit groove (11) and the length extension direction of the second limit groove (21).
7. Gear assembly according to claim 1, characterized in that a boss (13) is provided on the toothed disc of the first gear (1) surrounding the shaft hole, the toothed disc of the second gear (2) being snapped onto the boss (13).
8. An engine comprising a gear assembly as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580893.4A CN110206868B (en) | 2019-06-29 | 2019-06-29 | Gear assembly and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580893.4A CN110206868B (en) | 2019-06-29 | 2019-06-29 | Gear assembly and engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110206868A CN110206868A (en) | 2019-09-06 |
| CN110206868B true CN110206868B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910580893.4A Active CN110206868B (en) | 2019-06-29 | 2019-06-29 | Gear assembly and engine |
Country Status (1)
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| CN (1) | CN110206868B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140641A (en) * | 2019-12-11 | 2020-05-12 | 兰州飞行控制有限责任公司 | Backlash eliminating gear for coupling flight control shaft and angle sensor and using method thereof |
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