CN203770567U - Bevel gear friction disk type stepless speed change device - Google Patents
Bevel gear friction disk type stepless speed change device Download PDFInfo
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- CN203770567U CN203770567U CN201420049984.8U CN201420049984U CN203770567U CN 203770567 U CN203770567 U CN 203770567U CN 201420049984 U CN201420049984 U CN 201420049984U CN 203770567 U CN203770567 U CN 203770567U
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- shaft
- bevel gear
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- gear
- roller
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Abstract
The utility model provides a bevel gear friction disk type stepless speed change device which comprises an input shaft, an input shaft gear, middle shafts, input friction disks, idler wheels, idler wheel shafts, universal joints, transmission shafts, bevel gear shafts, a bevel gear output shaft, motors, gear transmission rods and load bearing rods. The input shaft gear is fixedly connected to the input shaft, the input shaft is arranged on a machine frame, the input friction disks are fixedly connected to the middle shafts, the middle shafts are arranged on the machine frame, the lateral sides of the input friction disks are meshed with the input shaft gear, the idler wheels and the input friction disks abut against each other to achieve friction transmission, the idler wheels are fixedly connected to the idler wheel shafts, the transmission shafts are connected with the idler wheel shafts through the universal joints, and the axes of the bevel gear shafts coincide with the axes of the transmission shafts. The bevel gear friction disk type stepless speed change device has the advantages of being low in cost, simple in structure, free of lubrication, high in transmission efficiency, small in friction resistance, smooth in speed change process and capable of expanding a speed change range. Furthermore, the idler wheels are replaceable, and a steering reducing mechanism is light and convenient to operate and only generates little abrasion.
Description
Technical field
The utility model belongs to mechanical transmission fields, is specifically related to a kind of bevel gear friction-disc stepless speed changes devices.
Background technique
Mechanical variable-speed unit transmission refers under certain control action, and the output speed that makes device is the continually varying kind of drive within the specific limits.Mechanical variable-speed unit has multiple type of belt drive, and wherein friction driving is the common structure pattern of mechanical variable-speed unit.Frictional force transmission campaign and power between the certain positive pressure lower transmission component of slip gear utilization.Its ability of transmitting frictional force and torque depends on friction factor and the positive pressure of driving component contact surface.Existing frictional variable speed mechanism, when increasing the bearing capacity (friction factor that needs to increase positive pressure or increase friction drive wheel Surface Contact place) of mechanism, can cause changing the effective rubbing contact radius of drive wheel in transmission process and realize the required surface friction drag overcoming of stepless change, and consequent driving component contact surface wearing and tearing such as all will sharply increase at the problem.So, existing frictional variable speed mechanism in fact all can only select friction factor compared with metallic type friction driving parts little and that surface abrasion resistance is higher, even also need, at driving component rubbing contact place filling traction lubricating oil, cause its bearing capacity to be very limited.So frictional variable speed device is limited to material, processing technology, the factor such as lubricated, is very limited in application.
The diameter reducing type Friction Stepless device of the utility model design, can control the drive wheel of high coefficient of friction in lower resistance, carries out level and smooth and continuous variation, and can adapt to the usage requirement of various working under low abrasive conditions.There is the features such as the operation of simple in structure, gear is light, speed-change process is level and smooth, practical, and in conjunction with bevel gear, the power that comes from friction roller is confluxed, realize larger velocity ratio.
Model utility content
Technical problem to be solved in the utility model, be to propose a kind of representative diameter reducing type Friction Stepless device, input end is primary gear speed reducing and the transmission of roller friction disk, output terminal is bevel gear drive, total three-step gear shift, friction driving wherein can be used and specifically turn to diameter changing mechanism to change smoothly velocity ratio.Three-step gear shift also makes transmission ratio excursion large, has wider application area.Mechanism has been used a set of specific arrangements for speed regulation, on intermediate roller, use a set of speed governing actuator that is similar to wheel steering mechanism, make intermediate roller produce lateral deviation, utilize the cornering behavior of intermediate roller, make intermediate roller change radial position under the effect of lateral force, realize speed-regulating function.
The technical solution adopted in the utility model:
By bevel gear friction-disc stepless speed changes devices, mainly by input shaft, input shaft gear, jack shaft, input friction disk, roller, roller shaft, universal joint, transmission shaft, bevel gear shaft, bevel gear output shaft, motor, gear dwang, bearing rod, formed.
Input shaft gear connects firmly on input shaft, and input shaft is arranged in frame, and input friction disk connects firmly on jack shaft, and jack shaft is arranged in frame, and input friction disk side is processed with tooth, meshes with input shaft gear; Roller and input friction disk compress mutually, realize friction driving; Roller connects firmly on roller shaft, and transmission shaft is connected with roller shaft by universal joint, and bevel gear shaft and drive shaft axis overlap, the two is sliding pair connection, sliding pair direction is the two axial direction, and bevel gear shaft is arranged in frame, and the bevel gear shaft on bevel gear output shaft and both sides is bevel gear drive; Bevel gear output shaft is arranged in frame.
Electric machine casing is that sliding pair is connected with frame, and sliding pair direction is identical with the sliding pair direction that transmission shaft and bevel gear shaft form; The output shaft of motor connects firmly a gear, again with gear dwang by gear transmission, gear dwang is connected with roller shaft by revolute pair, the impacting force passing in order to bear roller shaft, bearing rod one end and electric machine casing connect firmly, and the other end is that revolute pair is connected with gear dwang; The housing of motor produces and reverses when preventing roller lateral deviation, and the Gear axis direction of gear dwang should be crossed its corresponding universal joint center.
During gearing down, power is inputted by input shaft, via input friction disk, is passed to roller, by universal joint and spline, is passed to bevel gear shaft, by cone pulley, is meshed and is delivered to bevel gear output shaft.
For transmission is stablized and uniform stressed, intermediate transmission turns to diameter changing mechanism and bevel gear can have 2 covers, is symmetrically distributed in the both sides of input friction disk.As long as middle, turn to diameter changing mechanism can be symmetrically distributed in input friction disk around, can there be in theory many covers, but many covers turn to diameter changing mechanism when carrying out speed governing, it must be Complete Synchronization, implementation can be that motor or the mechanical type synchronous steering mechanism of synchronization control keeps synchronous, but because the manufacture deviation of intermediate roller, or because the wearing and tearing that system discontinuity causes are uneven, in mechanism's actual motion, be difficult to guarantee that many covers turn to the Complete Synchronization of reducing between diameter changing mechanism, its solution can be from structure, to guarantee that many covers turn to the Complete Synchronization moving between diameter changing mechanism by specific mechanism, or use and motor is carried out to closed loop control revise many covers and turn to the kinematic error of moving between diameter changing mechanism.
When this class device regulates velocity ratio, by micro-machine driven gear dwang, turn over an angle, can drive accordingly intermediate roller to produce lateral deviation, because side drift angle is very little, micro-machine need not consume too many power, and resistance is also little.Suppose that now roller is p1 with the point of contact of input friction disk, the speed that p1 is ordered is
vp1, is pure rolling between roller and input friction disk, and the speed that on roller, p1 is ordered is so also
vp1, the speed that on roller, p1 is ordered can be understood as a resultant velocity, two-part, consists of: the one, p1 point is with respect to the rotational velocity of the rotation axis of roller
vr1, its direction is perpendicular to the rotation axis of roller; The 2nd, the translational velocity Vs1 of roller integral body.Existence due to guide mechanism
vthe direction of s1 is also determined, and is had
vp1=
vr1+
vs1, roller can along input friction disk radial direction with speed
vs1 moves, and arrives a new transmission position, realizes the variation of velocity ratio.After steer motor is just returned, roller arrives new transmission contact radius position, and now motor is by locking (lockable mechanism can be taked the modes such as electromagnetic braking mode, not shown in FIG.), to guarantee that velocity ratio is in steady state.
For guaranteeing that the friction pair between friction disk and roller has enough positive pressures, whole mechanism needs to compress.Impacting force acts on friction disk.For making device still can apply impacting force after producing wearing and tearing, can apply impacting force (not shown in FIG.) with the spring of compression.Impacting force is delivered to roller by friction disk, by roller shaft, gear dwang, bearing rod, is delivered to electric machine casing, by electric machine casing, is born.
The feature of this device is:
1. crucial transmission part is the roller with certain viscous-elastic behaviour, and the friction factor of itself and friction disk is high, and cost is low, simple in structure, and without lubricated, transmission efficiency is high, and roller is replaceable;
2. in the time need carrying out speed governing, it is little that the effective rubbing contact radius of change drive wheel is realized the required surface friction drag overcoming of stepless change, turns to diameter changing mechanism operation light, and the wearing and tearing that cause are little;
3. do not need to disconnect power transmission during speed governing, speed-change process is level and smooth;
4. input end has adopted a gear disk to drive two friction disks, and output terminal adopts bevel gear drive, has three-step gear shift, has increased slewing range;
5. the transferring power causing for the wearing and tearing that solve in manufacture, assembly error and use is inaccurate, and motor can adopt respectively closed loop control.By closed loop control, carry out the kinematic error of correction mechanism movement process, guarantee accurate control; Also can use synchronous mechanism to realize the Complete Synchronization moving between reducing Duo Tao mechanism.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is bevel gear friction-disc stepless speed changes devices,
Attached number in the figure explanation:
1 input shaft, 2 input shaft gears, 3 input friction disks, 4 jack shafts, 5 roller shafts, 6 rollers, 7 motors, 8 bearing rods, 9 gear dwangs, 10 universal joints, 11 transmission shafts, 12 bevel gear shafts, 13 bevel gear output shafts.
Embodiment
Refer to shown in Fig. 1, Fig. 2, the utility model will be further described.
fig. 1by input shaft 1, input shaft gear 2, input friction disk 3, jack shaft 4, roller shaft 5, roller 6, motor 7, bearing rod 8, gear dwang 9, universal joint 10, transmission shaft 11, bevel gear shaft 12, bevel gear output shaft 13, formed
Input shaft gear 2 connects firmly on input shaft 1, and input shaft 1 is arranged in frame 0, and input friction disk 3 connects firmly on jack shaft 4, and jack shaft 4 is arranged in frame 0, and input friction disk 3 sides are processed with tooth, with input shaft gear 2 engagements; Roller 6 and input friction disk 3 compress mutually, realize friction driving; Roller 6 connects firmly on roller shaft 5, transmission shaft 11 is connected with roller shaft 5 by universal joint 10, bevel gear shaft 12 and transmission shaft 11 deads in line, the two is sliding pair connection, sliding pair direction is the two axial direction, bevel gear shaft 12 is arranged in frame 0, and bevel gear output shaft 13 is bevel gear drive with the bevel gear shaft 12 on both sides; Bevel gear output shaft 13 is arranged in frame 0.
Motor 7 housings are with frame 0 for sliding pair is connected, and sliding pair direction is identical with the sliding pair direction that transmission shaft 11 and bevel gear shaft 12 form; The output shaft of motor 7 connects firmly gear, again with gear dwang 9 by gear transmission, gear dwang 9 is connected with roller shaft 5 by revolute pair, the impacting force passing in order to bear roller shaft 5, bearing rod 8 one end and motor 7 housings connect firmly, and the other end and gear dwang 9 are connected for revolute pair; The housing of motor 7 produces and reverses when preventing roller 6 lateral deviation, and the Gear axis direction of gear dwang 9 should be crossed its corresponding universal joint 10 centers.
During gearing down, power is inputted by input shaft 1, supposes that the rotating speed of input shaft 1 is
, the number of teeth of input shaft gear 2 is
, on input friction disk 3, the number of teeth of the tooth of processing is
, input so friction disk 3 around the rotating speed of the axis of jack shaft 4
the point of contact of roller 6 and input friction disk 3 apart from the distance of jack shaft 4 axis is
.The speed of roller and input friction disk 3 point of contact
.If the radius of roller 6 is
, the angular velocity that roller 6 rotates
, because universal joint 10 and sliding pair do not change angular velocity, bevel gear 12 rotation angle degree
.The number of teeth in bevel gears and hypoid gears of bevel gear shaft 12 is
, the number of teeth in bevel gears and hypoid gears of bevel gear output shaft 13 is
.The angular velocity of bevel gear output shaft 13
=
, reduction speed ratio is so:
i
If the radius of input friction disk 2 is
, so
, due to
continually varying,
,
,
,
it is definite value.Therefore can realize stepless transmission, the excursion of velocity ratio is:
Note: infinity is just theoretic, in fact its bearing capacity is limited.Owing to being varied angle transferring power, this velocity ratio only represents size.
accompanying drawing 2set forth speed control principle:
When needs regulate velocity ratio, by micro-machine is synchronous, drive all gear dwangs to turn over an angle, can drive accordingly roller to produce lateral deviation, because side drift angle is very little, micro-machine need not consume too many power, and resistance is also little.Suppose that now roller is p1 with the point of contact of input friction disk, the speed that p1 is ordered is
vp1, is pure rolling between roller and input friction disk, and the speed that on roller, p1 is ordered is so also
vp1, the speed that on roller, p1 is ordered can be understood as a resultant velocity, two-part, consists of: the one, p1 point is with respect to the rotational velocity of the rotation axis of roller
vr1, its direction is perpendicular to the rotation axis of roller; The 2nd, the translational velocity Vs1 of roller integral body.Existence due to guide mechanism
vthe direction of s1 is also determined, and is had
vp1=
vr1+
vs1, roller can along input friction disk radial direction with speed
vs1 moves, and arrives a new transmission position, realizes the variation of velocity ratio.After steer motor is just returned, roller arrives new transmission contact radius position, and now motor is by locking (lockable mechanism can be taked the modes such as electromagnetic braking mode, not shown in FIG.), to guarantee that velocity ratio is in steady state.
Claims (1)
1. bevel gear friction-disc stepless speed changes devices, comprises input shaft, input shaft gear, jack shaft, input friction disk, roller, roller shaft, universal joint, transmission shaft, bevel gear shaft, bevel gear output shaft, motor, gear dwang, bearing rod; It is characterized in that: input shaft gear connects firmly on input shaft, input shaft is arranged in frame, and input friction disk connects firmly on jack shaft, and jack shaft is arranged in frame, input friction disk side and input shaft gear engagement; Roller and input friction disk compress mutually, realize friction driving; Roller connects firmly on roller shaft, and transmission shaft is connected with roller shaft by universal joint, and bevel gear shaft and drive shaft axis overlap, the two is sliding pair connection, sliding pair direction is the two axial direction, and bevel gear shaft is arranged in frame, and the bevel gear shaft on bevel gear output shaft and both sides is bevel gear drive; Bevel gear output shaft is arranged in frame; Electric machine casing is connected with machine frame movement is secondary, and the output shaft of dwang and motor is by primary gear speed reducing transmission, and dwang is that revolute pair is connected with roller shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049984.8U CN203770567U (en) | 2014-01-26 | 2014-01-26 | Bevel gear friction disk type stepless speed change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049984.8U CN203770567U (en) | 2014-01-26 | 2014-01-26 | Bevel gear friction disk type stepless speed change device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770567U true CN203770567U (en) | 2014-08-13 |
Family
ID=51287759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420049984.8U Expired - Fee Related CN203770567U (en) | 2014-01-26 | 2014-01-26 | Bevel gear friction disk type stepless speed change device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770567U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639311A (en) * | 2013-12-05 | 2014-03-19 | 北京联合大学 | Feed device of cold bending machine |
| CN108223729A (en) * | 2018-01-23 | 2018-06-29 | 浙江大邦电动工具有限公司 | Automatic compensation type contiuously variable transmission |
-
2014
- 2014-01-26 CN CN201420049984.8U patent/CN203770567U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639311A (en) * | 2013-12-05 | 2014-03-19 | 北京联合大学 | Feed device of cold bending machine |
| CN108223729A (en) * | 2018-01-23 | 2018-06-29 | 浙江大邦电动工具有限公司 | Automatic compensation type contiuously variable transmission |
| CN108223729B (en) * | 2018-01-23 | 2023-11-10 | 浙江大邦电动工具有限公司 | Automatic compensation stepless speed variator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20200126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |