CN108999953B - Transmission gear and linear actuator with high transmission efficiency - Google Patents
Transmission gear and linear actuator with high transmission efficiency Download PDFInfo
- Publication number
- CN108999953B CN108999953B CN201710417370.9A CN201710417370A CN108999953B CN 108999953 B CN108999953 B CN 108999953B CN 201710417370 A CN201710417370 A CN 201710417370A CN 108999953 B CN108999953 B CN 108999953B
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- tooth
- transmission
- gear
- drive
- tooth portion
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 105
- 230000004323 axial length Effects 0.000 claims description 8
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
-
- 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
- F16H55/12—Toothed members; Worms with body or rim assembled out of detachable parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a transmission gear with high transmission efficiency, which belongs to the technical field of linear transmission, and comprises a body and a transmission tooth part arranged on the periphery of the body, wherein the transmission tooth part comprises a first transmission tooth part and a second transmission tooth part axially and adjacently arranged on the first transmission tooth part, the first transmission tooth part comprises first tooth grooves which are distributed at intervals, the first tooth grooves are part of worm gear tooth grooves, the second transmission tooth part comprises second tooth grooves which are distributed at intervals, the second tooth grooves are part of helical tooth grooves, and the first tooth grooves are communicated with the second tooth grooves.
Description
[ Field of technology ]
The invention relates to a transmission gear with high transmission efficiency, and belongs to the technical field of linear transmission.
[ Background Art ]
The worm gear is a common transmission mode in mechanical transmission, especially in linear actuators, the existing transmission gears can be divided into two types, one type is the most common worm gear, one type can be seen from a figure 1 in the specification drawing, the tooth groove at the periphery is a worm gear tooth groove, the other type is a helical gear, one type can be seen from a figure 2 in the specification drawing, the tooth groove at the periphery is a helical tooth groove, and the existing problems are that when helical gear transmission is adopted, the transmission efficiency is high, but the self-locking performance is poor, and when common worm gear is adopted for transmission, the tooth strength is high, the self-locking performance is good, but the transmission efficiency is relatively low.
[ Invention ]
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the transmission gear with high transmission efficiency, which has high transmission efficiency and better tooth strength.
The technical problems are solved, and the invention adopts the following technical scheme:
The utility model provides a transmission gear that transmission efficiency is high, includes the body and establishes the transmission tooth portion of body periphery, transmission tooth portion includes first transmission tooth portion and the adjacent second transmission tooth portion of establishing on first transmission tooth portion of axial, first transmission tooth portion includes first tooth's socket of interval distribution, and first tooth's socket is the part of worm wheel tooth's socket, second transmission tooth portion includes the second tooth's socket of interval distribution, and the second tooth's socket is the part of skewed tooth's socket, first tooth's socket with second tooth's socket intercommunication.
The beneficial effects of the invention are that:
The transmission tooth part comprises two parts, wherein one part is a first transmission tooth part, the other part is a second transmission tooth part, a first tooth groove on the first transmission tooth part is a part of a worm gear tooth groove, a second tooth groove on the second transmission tooth part is a part of an inclined tooth groove, the part mainly refers to a part which is cut in the axial direction, the specific proportion of the part can be half or less or more, and the first tooth groove and the second tooth groove are mutually communicated to form an integral tooth groove after the first transmission tooth part and the second transmission tooth part are spliced, so that the integral tooth groove has the advantages of high strength of worm gear tooth grooves and self-locking property, and also has the advantage of high transmission efficiency of the inclined tooth groove.
Preferably, the first drive tooth portion includes a first gear tooth including a base tooth and an extension tooth extending radially outwardly from the base tooth.
Preferably, one side of the first tooth groove, which is communicated with the second tooth groove, is the inner end of the first tooth groove, and the outer end of the first tooth groove is closed.
Preferably, the second transmission gear part comprises second gear teeth, and the tooth tops of the connection parts of the base gear and the second gear teeth are flush with the tooth tops of the second gear teeth.
Preferably, the axial length of the first transmission gear part is L1, the axial length of the second transmission gear part is L2, and the L1: l2 satisfies 0.8.ltoreq.L1: l2 is less than or equal to 3.
Preferably, the l1=l2.
Preferably, the first transmission gear part and the second transmission gear part are of an integral structure.
Preferably, the first transmission gear part and the second transmission gear part are mutually independent, and the first transmission gear part is fixedly connected with the second transmission gear part.
Preferably, the transmission tooth part and the body are of an integrated structure; or, one of the first transmission tooth part and the second transmission tooth part is of an integral structure with the body, and the other is fixedly connected with the body.
In addition, the invention also discloses a linear actuator, which comprises a motor, wherein the motor is connected with a transmission worm, the transmission worm is meshed with a transmission gear, and the transmission gear is connected with a telescopic component.
Other features and advantages of the present invention will be disclosed in the following detailed description of the invention and the accompanying drawings.
[ Description of the drawings ]
The invention is further described with reference to the accompanying drawings:
fig. 1 is a schematic structural view of a conventional worm wheel;
FIG. 2 is a schematic view of a conventional helical gear;
FIG. 3 is a schematic diagram of a transmission gear according to a first embodiment of the present invention;
FIG. 4 is an end view of a first embodiment of a drive gear according to the present invention;
FIG. 5 is a schematic side view of a first embodiment of a transmission gear of the present invention;
fig. 6 is a schematic cross-sectional view of a transmission gear portion according to a first embodiment of the present invention.
[ Detailed description ] of the invention
The technical solutions of the embodiments of the present invention will be explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present invention.
In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc. are used to indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description of the embodiments and to simplify the description, 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 present invention.
Example 1
The worm wheel 3 shown in fig. 1 and the helical gear 4 shown in fig. 2 both comprise a body and a transmission tooth part arranged on the periphery of the body, wherein the difference is that tooth grooves of the transmission tooth parts are different or teeth of the transmission tooth parts are different, the strength of the teeth of the worm wheel in fig. 1 is relatively high, and the structure of the teeth is self-locking, namely, the worm wheel can only be driven by a worm to rotate, but the worm wheel cannot be driven by the worm to rotate; while the bevel gear of fig. 2 has the advantage of high transmission efficiency, its gear tooth structure is relatively weak.
As shown in fig. 3 to 6, the improved transmission gear shown in the present embodiment includes a body 1 and a transmission gear portion 2 disposed at the outer periphery of the body 1, a spline housing 11 for driving with a shaft is disposed on the body 1, the transmission gear portion 2 is herein referred to as a circle of the outer periphery of the body 1, and includes a plurality of gear teeth, and tooth grooves are formed between adjacent gear teeth. The improvement in this embodiment is that the driving gear portion 2 includes a first driving gear portion 21 and a second driving gear portion 22 axially adjacent to the first driving gear portion 21, the first driving gear portion 21 includes first tooth grooves 21a distributed at intervals, the first tooth grooves 21a are part of worm gear tooth grooves, the second driving gear portion 22 includes second tooth grooves 22a distributed at intervals, the second tooth grooves 22a are part of helical tooth grooves, the part referred to herein is mainly a part sectioned in the axial direction, the specific proportion of the part may be half or less or greater, after the first driving gear portion 21 and the second driving gear portion 22 are axially spliced, the first tooth grooves 21a and the second tooth grooves 22a are mutually communicated to form an integral tooth groove, and when the integral tooth groove is meshed with a driving worm, the integral tooth groove is meshed with the driving worm, so that the integral tooth groove has the advantages of high strength and self-locking property, and also has the advantage of high driving efficiency of helical tooth gear tooth grooves.
The concrete structure is as follows:
The worm gear slot cut by the first driving gear portion 21 in this embodiment is a worm gear slot end portion, that is, the first driving gear portion 21 includes a first gear tooth 21b, the first gear tooth 21b includes a base tooth 211b and an extension tooth 212b extending radially outward from the base tooth 211b, the base tooth 211b and the extension tooth 212b together form the first gear tooth 21b, and the structural strength of the gear tooth of the first gear tooth 21b is significantly greater than that of the gear tooth in the helical gear.
In addition, the first tooth groove 21a in this embodiment is a semi-closed tooth groove, specifically, the side where the first tooth groove 21a is communicated with the second tooth groove 22a is the inner end of the first tooth groove 21a, the inner end of the first tooth groove 21a is open, and the outer end of the first tooth groove 21a is closed, which corresponds to the connection of the outer end portions of the adjacent first tooth teeth 21b, and has the advantage that the forces born by the adjacent first tooth wheels 21b can share each other, that is, the first tooth teeth 21b can bear more forces in the tangential direction, and the strength of the transmission tooth part 2 is also increased.
It should be noted that, in the present embodiment, the first tooth slot 21a is preferably semi-closed, and in other embodiments, the outer end of the first tooth slot 21a may be open. Such embodiments also fall within the scope of the present invention.
In terms of size, the second gear teeth 22 includes second gear teeth 22b, and the tooth tops of the connection parts between the base teeth 211b and the second gear teeth 22b are flush with the tooth tops of the second gear teeth 22b, so that the connection parts between the first gear teeth 21 and the second gear teeth 22 are designed to be smoother, and are more suitable to be made into an integral structure, and the first gear teeth 21 and the second gear teeth 22 in this embodiment are preferably also of an integral structure, and the first gear teeth 21 and the second gear teeth 22 are also of an integral structure with the body 1.
As shown in fig. 5, the axial length of the first gear tooth part 21 is L1, the axial length of the second gear tooth part 22 is L2, and the L1: the ratio of L2 satisfies 0.8.ltoreq.L1: l2.ltoreq.3, it is of course preferred in this embodiment that l1=l2, i.e. L1: l2=1, and in this embodiment L1 is taken half the axial length of the worm gear teeth, and L2 is taken half the axial length of the helical gear teeth.
Example 2
The difference between this embodiment and embodiment 1 is that in this embodiment, the driving teeth are independent from the body, the driving teeth are fixed on the body by screws or other fixing means, and the first driving teeth and the second driving teeth in the driving teeth are maintained in an integral structure. With this design, the gear tooth portions can be manufactured separately and mounted to other bodies.
Example 3
The difference between this embodiment and embodiment 1 is that in this embodiment, the first driving gear portion and the second driving gear portion are independent of each other, are not an integral structure, and are fixedly connected together by fasteners such as screws to form the driving gear portion together, and the driving gear portion and the body are also independent of each other and are fixedly connected by screws or other fixing means.
Example 4
The difference between the present embodiment and embodiment 1 is that in the present embodiment, the first transmission gear portion and the second transmission gear portion are independent from each other, and one of the first transmission gear portion and the second transmission gear portion is of an integral structure with the body, for example, the first transmission gear portion is of an integral structure with the body, and the second transmission gear portion is fixedly connected with the first transmission gear portion, or the body.
Example 5
The embodiment is a linear actuator, the linear actuator includes the motor, and the motor is connected with the drive worm, the meshing of drive worm has drive gear, drive gear is connected with flexible subassembly, and flexible subassembly is the known technique in the linear actuator, and most commonly just lead screw, nut, lead screw and drive gear fixed connection drive nut when the lead screw rotates goes up and down, and the flexible pipe that the nut then connects the flexible usefulness realizes flexible function, and the linear actuator in this embodiment, its drive gear adoption just is the drive gear in above-mentioned several embodiments, this kind of linear actuator, and transmission efficiency is high, and intensity is also good, long service life.
While the invention has been described in terms of embodiments, it will be appreciated by those skilled in the art that the invention is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (8)
1. The utility model provides a transmission gear that transmission efficiency is high, includes the body and establishes the transmission tooth portion of body periphery, its characterized in that, transmission tooth portion includes first transmission tooth portion and the second transmission tooth portion of axially adjacent establishing on first transmission tooth portion, first transmission tooth portion is the part of worm wheel tooth groove including interval distribution, second transmission tooth portion includes interval distribution's second tooth groove, and the second tooth groove is the part of helical tooth groove, first tooth groove with second tooth groove intercommunication, first transmission tooth portion includes first teeth of a cogwheel, first teeth of a cogwheel include basic tooth and by the radial outside extension tooth of basic tooth, the axial length of first transmission tooth portion is L1, the axial length of second transmission tooth portion is L2, L1: l2 satisfies 0.8.ltoreq.L1: l2 is less than or equal to 3.
2. The high transmission efficiency transmission gear according to claim 1, wherein the side of the first tooth slot which is in communication with the second tooth slot is the inner end of the first tooth slot, and the outer end of the first tooth slot is closed.
3. The high transmission efficiency drive gear of claim 1, wherein the second drive tooth portion includes a second tooth, and wherein the tooth tip of the base tooth at the junction with the second tooth is flush with the tooth tip of the second tooth.
4. The high transmission efficiency transmission gear according to claim 1, wherein l1=l2.
5. The high transmission efficiency transmission gear according to any one of claims 1 to 4, wherein the first transmission gear portion and the second transmission gear portion are of an integral structure.
6. The high transmission efficiency drive gear according to any one of claims 1 to 4, wherein the first drive tooth portion and the second drive tooth portion are independent of each other, and the first drive tooth portion and the second drive tooth portion are fixedly connected.
7. The transmission gear with high transmission efficiency according to any one of claims 1 to 4, wherein the transmission tooth portion and the body are of an integral structure; or, one of the first transmission tooth part and the second transmission tooth part is of an integral structure with the body, and the other is fixedly connected with the body.
8. A linear actuator comprising a motor connected with a drive worm, said drive worm meshing with a drive gear, said drive gear being connected with a telescopic assembly, characterized in that said drive gear employs a drive gear according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710417370.9A CN108999953B (en) | 2017-06-06 | 2017-06-06 | Transmission gear and linear actuator with high transmission efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710417370.9A CN108999953B (en) | 2017-06-06 | 2017-06-06 | Transmission gear and linear actuator with high transmission efficiency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108999953A CN108999953A (en) | 2018-12-14 |
| CN108999953B true CN108999953B (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710417370.9A Active CN108999953B (en) | 2017-06-06 | 2017-06-06 | Transmission gear and linear actuator with high transmission efficiency |
Country Status (1)
| Country | Link |
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| CN (1) | CN108999953B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869466B (en) * | 2019-03-20 | 2024-04-12 | 金华市源宝农业机械设备有限公司 | Speed change gear structure of high-speed rice transplanter |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980060130A (en) * | 1996-12-31 | 1998-10-07 | 박병재 | Gear |
| JP2006117037A (en) * | 2004-10-20 | 2006-05-11 | Toyota Motor Corp | Vehicular steering system |
| JP2009008201A (en) * | 2007-06-29 | 2009-01-15 | Toyoda Gosei Co Ltd | Worm gear device |
| CN102182813A (en) * | 2009-12-21 | 2011-09-14 | 日立汽车***株式会社 | Worm wheel, power steering apparatus, and method of forming the worm wheel |
| JP2012112417A (en) * | 2010-11-22 | 2012-06-14 | Jtekt Corp | Reduction gear and method for manufacturing the same, and electric power steering device |
| CN203176139U (en) * | 2013-01-16 | 2013-09-04 | 上海索达传动机械有限公司 | Heavy truck, speed changer and secondary shaft of gearbox |
| DE102014205146A1 (en) * | 2014-03-19 | 2015-09-24 | Robert Bosch Gmbh | Spur gear for a worm gear, gear drive device with a spur gear and method for mounting a gear drive device |
| KR20170138659A (en) * | 2016-06-08 | 2017-12-18 | 주식회사 만도 | Reducer of Power Steering Apparatus for Vehicle |
| CN207316029U (en) * | 2017-06-06 | 2018-05-04 | 浙江捷昌线性驱动科技股份有限公司 | The travelling gear and linear actuators of a kind of transmission efficiency |
-
2017
- 2017-06-06 CN CN201710417370.9A patent/CN108999953B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980060130A (en) * | 1996-12-31 | 1998-10-07 | 박병재 | Gear |
| JP2006117037A (en) * | 2004-10-20 | 2006-05-11 | Toyota Motor Corp | Vehicular steering system |
| JP2009008201A (en) * | 2007-06-29 | 2009-01-15 | Toyoda Gosei Co Ltd | Worm gear device |
| CN102182813A (en) * | 2009-12-21 | 2011-09-14 | 日立汽车***株式会社 | Worm wheel, power steering apparatus, and method of forming the worm wheel |
| JP2012112417A (en) * | 2010-11-22 | 2012-06-14 | Jtekt Corp | Reduction gear and method for manufacturing the same, and electric power steering device |
| CN203176139U (en) * | 2013-01-16 | 2013-09-04 | 上海索达传动机械有限公司 | Heavy truck, speed changer and secondary shaft of gearbox |
| DE102014205146A1 (en) * | 2014-03-19 | 2015-09-24 | Robert Bosch Gmbh | Spur gear for a worm gear, gear drive device with a spur gear and method for mounting a gear drive device |
| KR20170138659A (en) * | 2016-06-08 | 2017-12-18 | 주식회사 만도 | Reducer of Power Steering Apparatus for Vehicle |
| CN207316029U (en) * | 2017-06-06 | 2018-05-04 | 浙江捷昌线性驱动科技股份有限公司 | The travelling gear and linear actuators of a kind of transmission efficiency |
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| Publication number | Publication date |
|---|---|
| CN108999953A (en) | 2018-12-14 |
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