CN115899231A - Backlash eliminating mechanism for gear transmission gear backlash - Google Patents
Backlash eliminating mechanism for gear transmission gear backlash Download PDFInfo
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- CN115899231A CN115899231A CN202211300144.XA CN202211300144A CN115899231A CN 115899231 A CN115899231 A CN 115899231A CN 202211300144 A CN202211300144 A CN 202211300144A CN 115899231 A CN115899231 A CN 115899231A
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- driving gear
- input shaft
- pressing sleeve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention provides a gear transmission gear backlash eliminating mechanism which comprises a driving gear and a driven gear, wherein the driving gear is sleeved on an input shaft and is coaxially connected with the input shaft, the driven gear is sleeved on an output shaft and is meshed with the driving gear and is coaxially and fixedly connected with the output shaft, and the driving gear comprises a first driving gear and a second driving gear, wherein the driving gear comprises the same tooth number and the same modulus. When the input shaft rotates forwards, the input shaft enables the first driving gear to rotate forwards, the first tooth flank of the driven gear is abutted against the first tooth flank of the first driving gear, and the driven gear is meshed with the first driving gear and rotates along with the first driving gear; when the input shaft rotates reversely, the input shaft enables the second driving gear to rotate reversely, the second tooth side surface of the driven gear is abutted against the second tooth side surface of the second driving gear, and the driven gear is meshed with the second driving gear and rotates along with the second driving gear, so that gear transmission tooth side gaps are eliminated.
Description
Technical Field
The invention belongs to the field of gear transmission, and particularly relates to a gear transmission gear backlash eliminating mechanism.
Background
In the existing industrial automation field, most gear drives are connected and driven by structural parts, and two meshed gears are kept in a fixed relative position. The simplest gear engagement method is a method with backlash, and there is an error in reverse rotation due to the backlash. There are various ways to eliminate backlash in the gear transmission, one of which is to divide the driving gear into two parts, namely a first driving gear and a second driving gear, the first driving gear is engaged with the left flank of the driven gear, and the second driving gear is engaged with the right flank of the driven gear.
The double-gear backlash eliminating structure is manufactured by differentiating the first driving gear and the second driving gear, for example, one tooth of one of the driving gears is reduced, so as to achieve the purpose of dislocation. However, such a structure requires precise design and precise manufacturing, which results in high processing cost; and the axial adjustable space of the two driving gears is small, so that the installation and debugging are difficult.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and aims to provide a gear transmission gear backlash eliminating mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme: the gear transmission gear side clearance gap eliminating mechanism comprises a driving gear which is sleeved on the input shaft and is coaxially connected with the input shaft, and a driven gear which is externally meshed with the driving gear, sleeved on the output shaft and coaxially fixedly connected with the output shaft; the driving gear comprises a first driving gear and a second driving gear which have the same tooth number and modulus, the first driving gear is coaxially and fixedly connected with the input shaft, the input shaft is also connected with a pressing sleeve for axially pressing the second driving gear, the pressing sleeve is circumferentially and fixedly connected with the input shaft and rotates along with the input shaft, and the second driving gear is circumferentially and fixedly connected with the pressing sleeve and rotates along with the pressing sleeve; the first tooth flank of the driven gear is abutted against the first tooth flank of the first driving gear, and the second tooth flank of the driven gear is abutted against the second tooth flank of the second driving gear; when the input shaft rotates forwards, the input shaft enables the first driving gear to rotate forwards, and the driven gear is meshed with the first driving gear and rotates along with the first driving gear; when the input shaft rotates reversely, the input shaft enables the second driving gear to rotate reversely through the pressing sleeve, and the driven gear is meshed with the second driving gear and rotates along with the second driving gear.
Among the above-mentioned technical scheme, the in-process of input shaft corotation and reversal, first driving gear and second driving gear all rotate along with the input shaft synchronization, when guaranteeing the input shaft corotation, driven gear's first flank of tooth and the first flank butt of first driving gear, driven gear and first driving gear meshing, when the input shaft reversal, driven gear's second flank of tooth and the second flank butt of second driving gear, driven gear and second driving gear meshing to this elimination gear drive's flank clearance.
In a preferred embodiment of the invention, the end face of the pressing sleeve, which is close to the second driving gear, is provided with first end face teeth, the end face of the second driving gear, which is close to the pressing sleeve, is provided with second end face teeth which are in staggered fit with the first end face teeth, and the second driving gear and the pressing sleeve are fixedly connected in the circumferential direction through the staggered insertion fit of the first end face teeth and the second end face teeth.
Among the above-mentioned technical scheme, the second driving gear realizes the circumference rigid coupling with the pressure cover through the dislocation grafting cooperation of first terminal surface tooth and second terminal surface tooth, and both circumference rigid coupling structures are reliable, and simple to operate.
In a preferred embodiment of the invention, the first driving gear and the input shaft are connected through a flat key to realize circumferential fixation; and/or the pressing sleeve is connected with the input shaft through a spline to realize circumferential fixed connection of the pressing sleeve and the input shaft.
In a preferred embodiment of the present invention, one end of the first driving gear is limited by a shoulder of the input shaft, and the other end of the first driving gear is tightly pressed by the second driving gear.
Among the above-mentioned technical scheme, the axial limit structure of first driving gear is simple, and the operation is reliable.
In a preferred embodiment of the invention, a union nut for axially pressing the clamping sleeve is screwed onto the input shaft.
Among the above-mentioned technical scheme, first driving gear, second initiative size and pressure cover three support tightly and concatenate on the input shaft in proper order, and the one end of first driving gear is spacing by the shaft shoulder, and the pressure cover is supported tightly by lock nut, realizes that three's axial is spacing from this, and simple structure is reliable.
In another preferred embodiment of the present invention, the input shaft is provided with a spring which is arranged between the lock nut and the pressing sleeve in a pressing manner.
Among the above-mentioned technical scheme, form the flexible construction through setting up the spring for first driving gear, second driving gear and pressure cover three have axial adjustable space, make three's installation and debugging easier.
In another preferred embodiment of the invention, the spring is a belleville spring. The disc spring has good anti-loosening and damping effects.
In another preferred embodiment of the invention, the number of the disc springs is two, and the large ends of the two disc springs are arranged in a buckling manner.
In the technical scheme, the two disc springs are arranged to improve the reliability.
In another preferred embodiment of the present invention, both ends of the input shaft are rotatably mounted on the support base through bearings, and the spring and the lock nut are respectively located at both sides of the bearings.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic cross-sectional structural view of a gear transmission backlash elimination mechanism of an embodiment.
Fig. 2 is a schematic view of a state in which the first driving gear is engaged with the driven gear.
Fig. 3 is a schematic view of a state in which the second driving gear is engaged with the driven gear.
Reference numerals in the drawings of the specification include: the gear-type clutch comprises a motor 1, a coupler 2, a supporting seat 3, a bearing 4, an input shaft 5, a spline 6, a first driving gear 7, a first tooth flank 71, a flat key 8, a second driving gear 9, a second tooth flank 91, a second end face tooth 10, a pressing sleeve 11, a first end face tooth 12, a spring 13, a locking nut 14, an output shaft 15, a driven gear 16, a first tooth flank 161, a second tooth flank 162 and a working table surface 17.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The invention provides a gear transmission gear backlash eliminating mechanism, which comprises a driving gear sleeved on an input shaft 5 and coaxially connected with the input shaft 5 and a driven gear 16 which is externally meshed with the driving gear, sleeved on an output shaft 15 and coaxially fixedly connected with the output shaft 15, as shown in figure 1. Input shaft 5 and output shaft 15 parallel arrangement, the left end of input shaft 5 is connected with motor 1 through shaft coupling 2, and input shaft 5 and output shaft 15's both ends all pass through bearing 4 rotatable installation on supporting seat 3, and the coaxial rigid coupling of output shaft 15's right-hand member has table surface 17. After passing through the gear transmission structure of the driving gear and the driven gear 16, the power of the worktable 17 comes from the motor 1 directly connected with the input shaft 5.
In the invention, the driving gear comprises a first driving gear 7 and a second driving gear 9 with the same tooth number and module, and the tooth parameters of the first driving gear 7 and the second driving gear 9 are consistent. The first driving gear 7 is located on the left side of the second driving gear 9, the first driving gear 7 is coaxially and fixedly connected with the input shaft 5, for example, the first driving gear 7 and the input shaft 5 are connected through a flat key 8 to realize circumferential fixation of the two. The second driving gear 9 is sleeved on the input shaft 5 in an empty mode, a pressing sleeve 11 used for axially pressing the second driving gear 9 is further connected to the input shaft 5, the pressing sleeve 11 is fixedly connected with the input shaft 5 in the circumferential direction and rotates along with the input shaft 5, and the second driving gear 9 is fixedly connected with the pressing sleeve 11 in the circumferential direction and rotates along with the pressing sleeve 11.
In the present embodiment, the left end of the first drive gear 7 abuts against the shoulder of the input shaft 5, and the right end of the first drive gear 7 abuts against the left end of the second drive gear 9. The pressing sleeve 11 is arranged on the right side of the second driving gear 9, the right end of the second driving gear 9 is tightly abutted to the left end of the pressing sleeve 11, and the input shaft 5 is in threaded connection with a locking nut 14 which is used for axially abutting against the right end of the pressing sleeve 11.
In the present invention, the teeth of the first driving gear 7 and the second driving gear 9 are not aligned, and are disposed by a certain angle, for example, the angle is θ. As shown in fig. 2, the first flank surface 161 of the driven gear 16 abuts against the first flank surface 71 of the first drive gear 7, and a gap is provided between the second flank surface 162 of the driven gear 16 and the second flank surface of the first drive gear 7; as shown in fig. 3, the second flank surface 162 of the driven gear 16 abuts against the second flank surface 91 of the second drive gear 9, and a gap is provided between the first flank surface 161 of the driven gear 16 and the first flank surface of the second drive gear 9.
As shown in fig. 1 and 2, when the motor 1 operates to rotate the input shaft 5 in the forward direction (for example, clockwise), the input shaft 5 rotates the first driving gear 7 clockwise (at this time, the second driving gear 9 also rotates clockwise with the input shaft 5), the first flank 161 of the driven gear 16 abuts against the first flank 71 of the first driving gear 7, the first driving gear 7 rotates clockwise, the left flank of the driven gear 16 engages with the first driving gear 7 and rotates counterclockwise with the first driving gear 7, and the driven gear 16 rotates the table surface 17 counterclockwise through the output shaft 15.
As shown in fig. 1 and 3, when the motor 1 operates to rotate the input shaft 5 in the reverse direction (counterclockwise rotation), the input shaft 5 rotates the second driving gear 9 counterclockwise (at this time, the first driving gear 7 also rotates counterclockwise with the input shaft 5) through the pressing sleeve 11, because the second flank 162 of the driven gear 16 abuts against the second flank 91 of the second driving gear 9, the second driving gear 9 rotates counterclockwise, the right flank of the driven gear 16 is engaged with the second driving gear 9 and rotates clockwise with the second driving gear 9, the driven gear 16 rotates the table top 17 clockwise through the output shaft 15, and the purpose of eliminating backlash when rotating in the reverse direction is achieved.
In the process of forward rotation and reverse rotation of the input shaft 5, the first driving gear 7 and the second driving gear 9 both rotate synchronously with the input shaft 5, so that the staggered angle of the teeth of the first driving gear 7 and the second driving gear 9 is always theta, and the relative positions of the teeth of the first driving gear 7 and the second driving gear 9 are unchanged. This ensures that the first flank surface 161 of the driven gear 16 abuts against the first flank surface 71 of the first drive gear 7 when the input shaft 5 rotates forward; when the input shaft 5 rotates in the reverse direction, the second flank surface 162 of the driven gear 16 abuts against the second flank surface 91 of the second drive gear 9.
As shown in fig. 1, in another preferred embodiment, the pressing sleeve 11 is fixed to the input shaft 5 in the circumferential direction: the pressing sleeve 11 is connected with the input shaft 5 through a spline 6 to realize circumferential fixed connection of the pressing sleeve and the input shaft, and the spline 6 is formed by a plurality of grooves which are cut on the outer wall of the input shaft 5 at intervals in the circumferential direction.
In another preferred embodiment, as shown in fig. 1, the second driving gear 9 is circumferentially fixed to the pressing sleeve 11 in a manner that: the left end face of the pressing sleeve 11 close to the second driving gear 9 is provided with first end face teeth 12, the right end face of the second driving gear 9 close to the pressing sleeve 11 is provided with second end face teeth 10 in staggered fit with the first end face teeth 12, and the second driving gear 9 and the pressing sleeve 11 are fixedly connected in the circumferential direction through staggered insertion fit of the first end face teeth 12 and the second end face teeth 10.
In another preferred embodiment, as shown in fig. 1, a spring 13 is sleeved on the input shaft 5 and is arranged between the lock nut 14 and the pressing sleeve 11 in a pressing mode, the spring 13 is a disc spring, and the spring 13 is preferably composed of two disc springs with large ends arranged in a buckling mode. The spring 13 and the lock nut 14 are respectively located at two sides of the bearing 4, specifically, the left end of the spring 13 abuts against the right end of the pressing sleeve 11, the left end of the bearing 4 abuts against the right end of the spring 13, and the left end of the lock nut 14 abuts against the right end of the bearing 4. The lock nut 14 transmits the axial force to the pressing sleeve 11 through the bearing 4 and the spring 13, so that the first end face teeth 12 of the pressing sleeve 11 are in staggered insertion fit with the second end face teeth 10 of the second driving gear 9, the circumferential fixed connection of the second driving gear 9 and the pressing sleeve 11 is realized, and the second driving gear 9 synchronously rotates along with the pressing sleeve 11.
In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The gear transmission gear side clearance gap eliminating mechanism comprises a driving gear which is sleeved on the input shaft and is coaxially connected with the input shaft, and a driven gear which is externally meshed with the driving gear, sleeved on the output shaft and coaxially fixedly connected with the output shaft; the driving gear comprises a first driving gear and a second driving gear which have the same tooth number and modulus, the first driving gear is coaxially and fixedly connected with an input shaft, the input shaft is also connected with a pressing sleeve for axially pressing the second driving gear, the pressing sleeve is circumferentially and fixedly connected with the input shaft and rotates along with the input shaft, and the second driving gear is circumferentially and fixedly connected with the pressing sleeve and rotates along with the pressing sleeve;
the first tooth side surface of the driven gear is abutted with the first tooth side surface of the first driving gear, and the second tooth side surface of the driven gear is abutted with the second tooth side surface of the second driving gear;
when the input shaft rotates positively, the input shaft enables the first driving gear to rotate positively, and the driven gear is meshed with the first driving gear and rotates along with the first driving gear;
when the input shaft rotates reversely, the input shaft enables the second driving gear to rotate reversely through the pressing sleeve, and the driven gear is meshed with the second driving gear and rotates along with the second driving gear.
2. The gear transmission backlash mechanism according to claim 1, wherein the pressing sleeve has a first end face tooth on an end face close to the second driving gear, the second driving gear has a second end face tooth in staggered fit with the first end face tooth on an end face close to the pressing sleeve, and the second driving gear and the pressing sleeve are fixedly connected in the circumferential direction through staggered insertion fit of the first end face tooth and the second end face tooth.
3. The gear transmission gear backlash anti-backlash mechanism according to claim 1, wherein the first driving gear and the input shaft are connected by a flat key to realize circumferential fixed connection therebetween;
and/or the pressing sleeve is connected with the input shaft through a spline to realize circumferential fixed connection of the pressing sleeve and the input shaft.
4. The gear transmission gear backlash mechanism of claim 1, wherein one end of the first drive gear is limited by a shoulder of the input shaft, and the other end of the first drive gear is abutted by the second drive gear.
5. The gear transmission backlash mechanism according to any one of claims 1 to 4, wherein a lock nut for axially abutting against the pressing sleeve is threadedly connected to the input shaft.
6. The gear transmission backlash mechanism according to claim 5, wherein a spring is fitted around the input shaft and is arranged between the lock nut and the pressing sleeve.
7. The gear drive backlash mechanism of claim 5, wherein the spring is a belleville spring.
8. The gear transmission gear backlash elimination mechanism of claim 7, wherein the number of the disc springs is two, and the large ends of the two disc springs are arranged in a buckling manner.
9. The gear drive backlash mechanism of claim 5, wherein both ends of said input shaft are rotatably mounted to said support base by bearings, and said spring and said lock nut are located on both sides of said bearings, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211300144.XA CN115899231A (en) | 2022-10-24 | 2022-10-24 | Backlash eliminating mechanism for gear transmission gear backlash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211300144.XA CN115899231A (en) | 2022-10-24 | 2022-10-24 | Backlash eliminating mechanism for gear transmission gear backlash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115899231A true CN115899231A (en) | 2023-04-04 |
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ID=86473450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211300144.XA Pending CN115899231A (en) | 2022-10-24 | 2022-10-24 | Backlash eliminating mechanism for gear transmission gear backlash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115899231A (en) |
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2022
- 2022-10-24 CN CN202211300144.XA patent/CN115899231A/en active Pending
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