CN110439982B - Connecting rod tooth-meshed type continuously variable transmission - Google Patents
Connecting rod tooth-meshed type continuously variable transmission Download PDFInfo
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- CN110439982B CN110439982B CN201910790114.3A CN201910790114A CN110439982B CN 110439982 B CN110439982 B CN 110439982B CN 201910790114 A CN201910790114 A CN 201910790114A CN 110439982 B CN110439982 B CN 110439982B
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- shaft
- cam
- continuously variable
- connecting rod
- ratchet
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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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
Abstract
The invention relates to a connecting rod tooth-meshed continuously variable transmission, which belongs to the field of mechanical transmission and comprises an input transmission mechanism, a speed regulating mechanism, an eccentric wheel mechanism, a ratchet wheel and pawl mechanism, an output mechanism and the like. The invention overcomes the defects of large pulsation degree, difficult balance of inertia force and inertia moment of a traditional mechanical stepless speed changer system, and realizes the design purposes of constant power transmission, adjustable transmission ratio, large bearing capacity and power failure protection.
Description
Technical Field
The invention relates to the field of mechanical transmission, in particular to a connecting rod tooth-meshed type continuously variable transmission.
Background
The traditional speed changer is generally a stepped speed changer consisting of a plurality of pairs of gears, the change of output rotating speed and torque is realized by meshing the gears with different transmission ratios, the problems of low operating efficiency, complex structure, unstable speed change process and the like exist, and the requirement of people on mechanical stepless speed change cannot be met.
The traditional pulse type stepless speed changer has the defects of large pulsation degree of output motion, inertia force generated when a connecting rod moves, too low bearing performance caused by the structure of an overrunning clutch and the like, and the speed of the traditional mechanical type stepless speed changer can be accurately controlled, but the traditional mechanical type stepless speed changer has the defects of large volume, low bearing capacity and short service life.
Disclosure of Invention
The invention provides a connecting rod tooth-meshed type continuously variable transmission, which solves the problems of large pulsation degree, low bearing capacity, short service life and large volume of the conventional mechanical continuously variable transmission.
The technical scheme of the invention is as follows: : a connecting rod tooth-meshed stepless speed variator is composed of input drive mechanism, speed regulating mechanism, eccentric wheel mechanism, ratchet-pawl mechanism and output mechanism.
The input transmission mechanism comprises a pair of small bearings, an input shaft worm, a worm gear, an intermediate shaft, a shaft sleeve, two bearings, a flat key, two inclined iron blocks and two eccentric wheels, the pair of small bearings are installed on two sides of the input shaft worm, the input shaft worm is meshed with the worm gear, the worm gear is in key joint with the intermediate shaft through the flat key, the bearing sleeve is installed on two sides of the intermediate shaft, the two inclined iron blocks are matched with the two eccentric wheels, the two eccentric wheels and the two inclined iron blocks rotate under the driving of the intermediate shaft and are distributed at a phase angle of 180 degrees, and motion input is achieved.
The speed regulating mechanism comprises a pair of bevel gears, a threaded shaft, a shaft sleeve, a bearing, a clamping ring, a left L-shaped frame and a right L-shaped frame, the bevel gears are meshed with each other, a large bevel gear in the bevel gears is in key connection with the threaded shaft, the threaded shaft is connected with the large bevel gear through a key, the left L-shaped frame and the right L-shaped frame are connected with the threaded shaft through thread matching, and the clamping ring is abutted against the outer end face of the bearing.
The eccentric wheel mechanism comprises an oblique iron block and a cam, wherein the oblique iron block is matched with the cam, and the oblique iron block drives the cam to rotate and simultaneously makes continuous linear motion in the cam.
The ratchet wheel and pawl mechanism comprises two pawls, a ratchet wheel, a sliding block, a sliding way, a connecting rod, a cam and an inclined iron block, wherein the inclined iron block is matched with the cam, the cam is connected with the connecting rod, the connecting rod is connected with the sliding block, the sliding block slides in the sliding way, the sliding block is also connected with the two pawls, and the two pawls are meshed with the ratchet wheel.
The output mechanism comprises an output shaft, a ratchet wheel and a bearing, wherein the ratchet wheel is matched with the bearing, and the output shaft is connected with the matched ratchet wheel bearing.
The input shaft, the output shaft, the intermediate shaft and the threaded shaft are arranged in parallel.
The two eccentric wheels and the two inclined iron blocks are distributed in a 180-degree phase position.
When the inclined iron block rotates together with the cam through the thread structure, the position of the inclined iron block in the cam is changed, so that the eccentricity of the cam is changed.
The two ratchet wheels are respectively provided with two driving pawls, and the two pawls alternately act on the teeth of the ratchet wheels to further reduce pulsation.
The threaded shaft is matched with the L-shaped frame with threads, and the rotation motion is converted into continuous linear motion by utilizing the rotation of the threads.
The eccentric wheel is used as a crank, the length of the crank is adjusted by adjusting the eccentricity of the eccentric wheel, and finally the stepless speed regulation function is realized.
The ratchet mechanism is connected with the cam rocker mechanism through a sliding block, and a sliding way of the sliding block is fixed.
The pawl ratchet wheel is matched with the eccentric wheel speed regulating mechanism, and stepless speed regulation is realized by changing the mode of regulating the transmission ratio of the ratchet wheel and the pawl.
The invention has the beneficial effects that:
the invention takes the cam-link combined mechanism as the pulse generating mechanism, adopts the design of combining the double cam mechanism and the double ratchet-pawl mechanism, and effectively overcomes the defect of poor power performance. The cam eccentricity is changed by the continuous change of the position of the inclined slide block in the cam, and the stepless speed regulation is realized.
The invention overcomes the defects of large pulsation degree and difficult balance of inertia force and inertia moment of the traditional stepless speed changer system by matching the threaded structure, the double eccentric wheel mechanism and the bidirectional pawl, and can achieve the design purposes of constant power transmission, adjustable transmission ratio, large bearing capacity and power failure protection.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a schematic view of an input drive mechanism;
FIG. 3 is a schematic view of a speed adjustment mechanism;
FIG. 4 is a schematic view of an eccentric wheel mechanism;
FIG. 5 is a schematic view of a ratchet and pawl configuration;
FIG. 6 is a schematic diagram of an output structure;
in the figure: 1. the gear mechanism comprises an input shaft, a worm 2, a worm wheel 3, an intermediate shaft 4, an oblique iron block 5, a cam 6, a ratchet 7, a pawl 8, a rocker 9, an output shaft 10, a large bevel gear 11, a small bevel gear 12, a threaded shaft 13, an L-shaped frame 14, a slideway 15, a sliding block 16 and a sliding block.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
a connecting rod tooth-meshed continuously variable transmission is composed of an input transmission mechanism, a speed regulating mechanism, an eccentric wheel mechanism, a ratchet wheel and pawl mechanism, an output mechanism and the like, and is shown in figure 1. The input shaft 1 rotates to drive the worm 2 and the worm wheel 3 to rotate, the worm wheel 3 is in key connection with the intermediate shaft 4, the intermediate shaft 4 rotates to drive the two eccentric wheels 6 and the wedge 5 to rotate together, the eccentric wheels 6 are connected with the ratchet wheel 7 and the pawl 8 through the rocker 9 and the slide block 16, the rotary motion of the eccentric wheels 6 is converted into the linear motion of the slide block 16 in the slideway 15, then the ratchet wheel 7 acts on the gear teeth of the ratchet wheel 7 through the pawl 8 to further convert into the rotary motion of the ratchet wheel 7, the ratchet wheel 7 is connected with the output shaft 10 through a flat key, the ratchet wheel 7 rotates to drive the output shaft 10 to rotate, the two-stage, the threaded shaft 13 is driven to rotate by the meshing of the large and small bevel gears 11 and 12, the L-shaped frame 14 is meshed with the threaded shaft 13 through threads, the L-shaped frame 14 is finally driven to do linear motion along the direction of the middle axis by the rotation of the threaded shaft 13, and the L-shaped frame 14 drives the inclined iron block 5 to rotate with the cam 6 and simultaneously continuously move in the cam 6 along the axial direction. The matching of the oblique iron block 5 and the eccentric wheel 6 ensures that the axial movement of the oblique iron block 5 changes the eccentric distance of the eccentric wheel, and the stepless speed regulation is completed through the change of the eccentric distance.
The input transmission mechanism comprises a pair of small bearings, an input shaft worm, a worm wheel, an intermediate shaft, a shaft sleeve, two bearings, a flat key, two inclined iron blocks and two eccentric wheels, and is shown in figure 2. The pair of small bearings are arranged on two sides of the input shaft worm, the input shaft worm is meshed with the worm wheel, the worm wheel is in key joint with the intermediate shaft through a flat key, bearing sleeves are arranged on two sides of the intermediate shaft, the two oblique iron blocks are matched with the two eccentric wheels, the two eccentric wheels and the two oblique iron blocks are driven by the intermediate shaft to rotate and are distributed at a phase angle of 180 degrees, and motion input is achieved.
The speed regulating mechanism comprises a pair of bevel gears, a threaded shaft, a shaft sleeve, a bearing, a clamping ring, a left L-shaped frame and a right L-shaped frame, and is shown in figure 3. The pair of bevel gears are meshed with each other, a large bevel gear in the pair of bevel gears is in key connection with a threaded shaft, the threaded shaft is connected with the large bevel gear through a key, the left L-shaped frame and the right L-shaped frame are connected with the threaded shaft through thread matching, and the clamping ring is abutted against the outer end face of the bearing.
The eccentric wheel mechanism comprises an oblique iron block, a cam and the like, as shown in figure 4. The wedge block is matched with the cam, and the wedge block drives the cam to rotate and simultaneously makes continuous linear motion in the cam.
The ratchet wheel and pawl mechanism comprises two pawls, a ratchet wheel, a sliding block, a slideway, a connecting rod, a cam and an inclined iron block, and is shown in figure 5.
The wedge is matched with the cam, the cam is connected with the connecting rod, the connecting rod is connected with the sliding block, the sliding block slides in the slide way, the sliding block is also connected with the two pawls, and the two pawls are meshed with the ratchet wheel.
The output mechanism comprises an output shaft, a ratchet wheel, a bearing and the like, as shown in fig. 6, the ratchet wheel is matched with the bearing, and the output shaft is connected with the matched ratchet wheel bearing.
The input shaft, the output shaft, the intermediate shaft and the threaded shaft are arranged in parallel.
The two eccentric wheels and the two inclined iron blocks are distributed in a 180-degree phase position.
When the inclined iron block rotates together with the cam through the thread structure, the position of the inclined iron block in the cam is changed, so that the eccentricity of the cam is changed.
The two ratchet wheels are respectively provided with two driving pawls, and the two pawls alternately act on the teeth of the ratchet wheels to further reduce pulsation.
The threaded shaft is matched with the L-shaped frame with threads, and the rotation motion is converted into continuous linear motion by utilizing the rotation of the threads.
The eccentric wheel is used as a crank, the length of the crank is adjusted by adjusting the eccentricity of the eccentric wheel, and finally the speed is adjusted in the motion process.
The ratchet mechanism is connected with the cam rocker mechanism through a sliding block, and a sliding way of the sliding block is fixed.
The pawl ratchet wheel is matched with the eccentric wheel speed regulating mechanism, and stepless speed regulation is realized by changing the mode of regulating the transmission ratio of the ratchet wheel and the pawl.
The above is a preferred embodiment of the present invention, and the present invention is not limited thereto. Thus, modifications and variations of the embodiments described herein, based on the innovative device of the invention, are included within the scope of the patent protection of the invention.
Claims (8)
1. A connecting rod tooth-locked type continuously variable transmission is characterized in that: the device consists of an input transmission mechanism, a speed regulating mechanism, an eccentric wheel mechanism, a ratchet wheel and pawl mechanism and an output mechanism;
the input transmission mechanism comprises a pair of small bearings, an input shaft worm, a worm gear, an intermediate shaft, a shaft sleeve, two bearings, a flat key, two inclined iron blocks and two eccentric wheels, wherein the pair of small bearings are arranged on two sides of the input shaft worm, the input shaft worm is meshed with the worm gear, the worm gear is in key joint with the intermediate shaft through the flat key, the bearing sleeve is arranged on two sides of the intermediate shaft, the two inclined iron blocks are matched with the two eccentric wheels, and the two eccentric wheels and the two inclined iron blocks rotate under the driving of the intermediate shaft and are distributed at a phase angle of 180 degrees to realize motion input;
the speed regulating mechanism comprises a pair of bevel gears, a threaded shaft, a shaft sleeve, a bearing, a clamping ring, a left L-shaped frame and a right L-shaped frame, the bevel gears are meshed with each other, a large bevel gear in the bevel gears is connected with the threaded shaft through a spline, the left L-shaped frame and the right L-shaped frame are connected with the threaded shaft through threaded combination, and the clamping ring is abutted to the outer end face of the bearing;
the eccentric wheel mechanism comprises an oblique iron block and a cam, the oblique iron block is matched with the cam, and the oblique iron block drives the cam to rotate and simultaneously makes continuous linear motion in the cam;
the ratchet wheel and pawl mechanism comprises two pawls, two ratchets, two sliding blocks, two slideways, two connecting rods, two cams and two inclined iron blocks, wherein the inclined iron blocks are matched with the cams, the cams are connected with the connecting rods, the connecting rods are connected with the sliding blocks, the sliding blocks slide in the slideways, the sliding blocks are also connected with the two pawls simultaneously, and the two pawls are meshed with the ratchets;
the output mechanism comprises an output shaft and a bearing, and the ratchet wheel is connected with the output shaft through the bearing.
2. The connecting-rod-intermeshing type continuously variable transmission as claimed in claim 1, wherein the input shaft, the output shaft, the intermediate shaft and the threaded shaft are arranged in parallel.
3. The connecting rod-engaging continuously variable transmission of claim 1, wherein the cam eccentricity is changed by changing a position of the wedge in the cam when the wedge is rotated together with the cam by the screw connection.
4. The connecting rod-engaging continuously variable transmission of claim 1, wherein said two ratchet gears are each provided with two driving pawls, and the two pawls alternately act on the teeth of the ratchet gears to further reduce pulsation.
5. The connecting rod-engaging continuously variable transmission of claim 1, wherein the threaded shaft is engaged with a threaded L-shaped carrier to convert rotational motion into continuous linear motion using threaded rotation.
6. The connecting rod-engaging continuously variable transmission according to claim 1, wherein the eccentric wheel is used as a crank, and the length of the crank is adjusted by adjusting the eccentricity of the eccentric wheel, thereby finally realizing the speed regulation function.
7. The connecting rod-engaging continuously variable transmission of claim 1, wherein the ratchet mechanism is connected to the cam-rocker mechanism via a sliding block, and the sliding track of the sliding block is stationary.
8. The connecting rod-engaging continuously variable transmission of claim 1, wherein the pawl-ratchet mechanism cooperates with an eccentric wheel speed control mechanism to achieve continuously variable speed control by changing the gear ratio of the ratchet-ratchet mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790114.3A CN110439982B (en) | 2019-08-26 | 2019-08-26 | Connecting rod tooth-meshed type continuously variable transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790114.3A CN110439982B (en) | 2019-08-26 | 2019-08-26 | Connecting rod tooth-meshed type continuously variable transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110439982A CN110439982A (en) | 2019-11-12 |
| CN110439982B true CN110439982B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910790114.3A Expired - Fee Related CN110439982B (en) | 2019-08-26 | 2019-08-26 | Connecting rod tooth-meshed type continuously variable transmission |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112318036B (en) * | 2020-11-16 | 2022-11-01 | 江苏台正数控设备有限公司 | Connecting device is separated with symmetry disc formula to machining |
| CN112610672B (en) * | 2020-12-08 | 2022-06-03 | 安徽工程大学 | Design method of crank and rocker mechanism of rotation and reciprocating swing conversion device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6131758A (en) * | 1984-07-23 | 1986-02-14 | Seiroku Sasauchi | Gear system non-stage transmission |
| CN2128983Y (en) * | 1992-06-13 | 1993-03-31 | 陕西机械学院 | Juxtaposition connecting rod type impulsive motion stepless speed variator |
| CN101398069A (en) * | 2007-09-24 | 2009-04-01 | 麦妙玲 | Continuously variable transmission |
| CN107939933A (en) * | 2017-11-17 | 2018-04-20 | 中国人民解放军陆军装甲兵学院 | A kind of gear connecting rod pulse-type continuously variable transmission |
| CN108180269A (en) * | 2017-12-11 | 2018-06-19 | 王鑫弘 | Prime mover and the power such as speed reducer and slow-speed of revolution accelerating transmission gear and generator combination generating set |
-
2019
- 2019-08-26 CN CN201910790114.3A patent/CN110439982B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6131758A (en) * | 1984-07-23 | 1986-02-14 | Seiroku Sasauchi | Gear system non-stage transmission |
| CN2128983Y (en) * | 1992-06-13 | 1993-03-31 | 陕西机械学院 | Juxtaposition connecting rod type impulsive motion stepless speed variator |
| CN101398069A (en) * | 2007-09-24 | 2009-04-01 | 麦妙玲 | Continuously variable transmission |
| CN107939933A (en) * | 2017-11-17 | 2018-04-20 | 中国人民解放军陆军装甲兵学院 | A kind of gear connecting rod pulse-type continuously variable transmission |
| CN108180269A (en) * | 2017-12-11 | 2018-06-19 | 王鑫弘 | Prime mover and the power such as speed reducer and slow-speed of revolution accelerating transmission gear and generator combination generating set |
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| CN110439982A (en) | 2019-11-12 |
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