CN210265766U - Backlash-free gear transmission mechanism - Google Patents
Backlash-free gear transmission mechanism Download PDFInfo
- Publication number
- CN210265766U CN210265766U CN201920539433.2U CN201920539433U CN210265766U CN 210265766 U CN210265766 U CN 210265766U CN 201920539433 U CN201920539433 U CN 201920539433U CN 210265766 U CN210265766 U CN 210265766U
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- China
- Prior art keywords
- gear
- backlash
- tensioning
- driving gear
- elastic body
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- Expired - Fee Related
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Abstract
The utility model discloses a no backlash gear drive designs, including screw, apron, elastomer, tensioning gear, cylindric lock and driving gear. The tensioning gear body is provided with an installation groove, and an elastic body and a cylindrical pin are arranged in the installation groove; one end of the elastic body is connected with the cylindrical pin, and the other end of the elastic body is connected to the wall of the mounting groove; the cylindrical pin is fixed on the driving gear through a pin hole on the end surface of the driving gear; the tensioning gear and the driving gear are coaxially arranged on the transmission shaft, a key groove is formed in the driving gear, the tensioning gear and the driving gear are fixed with the transmission shaft through cancellation, and the driving gear is driven to rotate by the transmission shaft. The device provided by the utility model can realize gear drive's no backlash meshing, need not carry out any special adjustment, has simple structure, reliability height, but advantages such as assemblability is strong.
Description
Technical Field
The utility model belongs to the technical field of gear drive, a no backlash gear drive is related to.
Background
The gear transmission mechanism is a transmission device which is widely applied, can realize torque transmission and matching between a motor and an actuating mechanism, and can also realize conversion between linear motion and rotary motion. At present, due to factors such as dimensional change caused by machining, installation errors and temperature change, jamming is prevented, and certain tooth side clearance exists on the non-working surface of the gear teeth. The gear transmission has backlash to prevent the gear teeth from seizing due to errors and thermal deformation, and to leave room for a lubricating oil film between the tooth surfaces. However, the backlash brings a certain idle stroke to the mechanism during reverse rotation, so that the mechanism cannot be accurately positioned, and meanwhile, great noise is generated in the operation process, and the damage of the gear is accelerated. In order to reduce or eliminate the adverse effect of backlash on the mechanism, a backlash-free gear transmission is required.
With the increasing requirement on precision, in the occasions where high-precision position information needs to be transmitted, a proper error adjusting method must be adopted to control the error amount, improve the transmission precision and achieve a more precise motion effect. However, backlash is a main source of generation of backlash in gear transmission, greatly affects precision indexes of a transmission mechanism, and generates noise. At present, methods for eliminating or reducing gear transmission backlash mainly comprise spring backlash elimination, electronic control backlash elimination and the like. The methods have the defects of complex structure and operation, poor universality, small application range, high cost and the like to a certain extent. Therefore, the backlash-free gear transmission mechanism with the characteristics of simple structure, high reliability, strong assembly and the like is provided, and has very important significance for realizing high-precision and low-noise transmission.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming prior art's weak point, provides a no backlash gear drive. The utility model provides a mechanism can realize gear drive's no backlash meshing transmission, need not carry out any special adjustment, but has simple structure, the reliability is high, assemblability is strong, and is suitable for advantages such as rigidity scope is big.
The technical scheme of the utility model as follows:
a backlash-free gear transmission mechanism comprises a driving gear, a tensioning gear is coaxially arranged above the tensioning gear, and the shape of the tensioning gear is consistent with that of the driving gear; the tensioning gear is provided with an installation groove, and the driving gear is provided with a fixing pin inserted into the installation groove; the installation groove is filled with an elastic body, and the elastic body applies elastic forces in opposite directions to the tensioning gear and the fixing pin respectively.
In a further improvement, the fixing pin is a cylindrical pin, and the cylindrical pin is fixed on the driving gear through a pin hole in the end face of the driving gear.
Further improvement, the backlash-free gear transmission mechanism further comprises a cover plate, and the cover plate is fixed with the fixing pin through a screw.
In a further improvement, the mounting grooves and the fixing pins are provided with a plurality of groups and are uniformly distributed on the gear.
In a further improvement, the mounting grooves and the fixing pins are provided with 4 groups and are uniformly distributed on the gear.
In a further improvement, the mounting groove is arc-shaped, rectangular or circular.
In a further improvement, the mounting groove is arc-shaped.
In a further improvement, the elastic body is a spring body or a rubber body.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model provides a pair of no backlash gear drive designs and can realizes gear drive's no backlash meshing, need not carry out any special adjustment, has simple structure, reliability height, but advantages such as assemblability is strong.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a backlash-free gear transmission mechanism of the present invention.
Fig. 2 is an overall view of the design of the backlash-free gear transmission mechanism of the present invention.
Reference numerals: 1. a screw; 2. a cover plate; 3. an elastomer; 4. mounting grooves; 5. a tension gear; 6. a cylindrical pin; 7. a drive gear.
Detailed Description
The present invention is illustrated by the following specific embodiments:
as shown in figure 1, the design of the backlash-free gear transmission mechanism comprises a screw (1), a cover plate (2), an elastic body (3), a tensioning gear (5), a cylindrical pin (6) and a driving gear (7). The main body of the tensioning gear (5) is provided with a mounting groove (4), and an elastic body (3) and a cylindrical pin (6) are arranged in the mounting groove (4); one end of the elastic body (3) is connected with the cylindrical pin (6), and the other end of the elastic body is connected to the wall of the mounting groove (4); the cylindrical pin (6) is fixed on the driving gear (7) through a pin hole on the end surface of the driving gear; the tensioning gear (5) and the driving gear (7) are coaxially mounted on the transmission shaft, a key groove is formed in the driving gear (7), the driving gear and the transmission shaft are fixed through cancellation, and the driving gear (7) is driven to rotate by the transmission shaft.
In the embodiment, the mounting grooves (4) formed in the main body of the tensioning gear (5) are uniformly distributed, the number of the mounting grooves is 4, and the mounting grooves are arc-shaped.
In this embodiment, the elastic body (3) is a spring body.
The utility model discloses an actual application process as follows:
1) one end of the elastic body (3) connected to the groove wall of the mounting groove (4) on the tensioning gear main body and the cylindrical pin (6) simultaneously apply tensioning force to the groove wall and the cylindrical pin (6);
2) the tensioning force applied to the cylindrical pin (6) by the elastic body (3) is transmitted to the driving gear (7);
3) under the pushing of the tension of the elastic body (3), the tooth surface of the gear tooth of the tension gear (5) is always in backlash-free meshing with the tooth surface of one side of the gear tooth of the external meshing gear;
4) under the pushing of the reverse tension of the elastic body (3), one side tooth surface of the gear tooth of the driving gear (7) is always meshed with the other side tooth surface of the gear tooth of the external meshing gear without backlash;
5) the transmission shaft drives the driving gear (7) to rotate, and the gapless gear transmission is completed.
Although particular embodiments of the present invention have been described above, the particular embodiments described are illustrative only and are not intended to limit the scope of the invention, and equivalent modifications and variations made in accordance with the spirit of the invention are intended to be included within the scope of the appended claims.
Claims (8)
1. The utility model provides a no backlash gear drive, includes the driving gear, its characterized in that: a tensioning gear is coaxially arranged above the tensioning gear, and the shape of the tensioning gear is consistent with that of the driving gear; the tensioning gear is provided with an installation groove, and the driving gear is provided with a fixing pin inserted into the installation groove; the installation groove is filled with an elastic body, and the elastic body applies elastic forces in opposite directions to the tensioning gear and the fixing pin respectively.
2. The backlashless gear transmission of claim 1, wherein the retaining pin is a cylindrical pin that is secured to the drive gear via a pin hole in an end face of the drive gear.
3. The backless gear assembly of claim 1, further comprising a cover plate secured to the retaining pin by a screw.
4. The backlash-free gear assembly as recited in claim 1, wherein said mounting grooves and said fixing pins are provided in plural sets and are uniformly distributed on the gear.
5. The backlash-free gear transmission as claimed in claim 4, wherein said mounting grooves and said fixing pins have 4 sets, which are uniformly distributed on the gear.
6. The backlash-free gear transmission as claimed in claim 1, wherein said mounting groove has a shape of a circular arc, a rectangle, or a circle.
7. The backlash-free gear transmission as claimed in claim 6, wherein said mounting groove is formed in a circular arc shape.
8. A backlash free gear assembly as claimed in claim 1, wherein said resilient body is a spring body or a rubber body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539433.2U CN210265766U (en) | 2019-04-19 | 2019-04-19 | Backlash-free gear transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539433.2U CN210265766U (en) | 2019-04-19 | 2019-04-19 | Backlash-free gear transmission mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210265766U true CN210265766U (en) | 2020-04-07 |
Family
ID=70022508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920539433.2U Expired - Fee Related CN210265766U (en) | 2019-04-19 | 2019-04-19 | Backlash-free gear transmission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210265766U (en) |
-
2019
- 2019-04-19 CN CN201920539433.2U patent/CN210265766U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200407 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |