CN214578665U - Speed changing device and gearbox - Google Patents
Speed changing device and gearbox Download PDFInfo
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- CN214578665U CN214578665U CN202120374162.7U CN202120374162U CN214578665U CN 214578665 U CN214578665 U CN 214578665U CN 202120374162 U CN202120374162 U CN 202120374162U CN 214578665 U CN214578665 U CN 214578665U
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Abstract
The utility model provides a speed change device and a gearbox, wherein the speed change device comprises a drive bevel gear, at least one drive bevel gear meshed with the drive bevel gear, a drive conical disc, a drive bevel wheel in contact transmission with the drive conical disc, a transmission mechanism, an input shaft and an output shaft, wherein a constant transmission ratio is provided between the drive bevel gear and the drive bevel gear, and the drive bevel wheel can shift between the maximum circumference and the minimum circumference of the drive conical disc; the transmission bevel gear is connected with the transmission bevel gear through a transmission mechanism; the input shaft is connected with the driving conical disc, and the output shaft is connected with the driving bevel gear; or the input shaft is connected with the driving bevel gear, and the output shaft is connected with the driving bevel disk. The utility model has the advantages of small occupied space, high reliability and low cost.
Description
Technical Field
The utility model belongs to the technical field of the variable speed, concretely relates to infinitely variable device and gearbox.
Background
A transmission for a fuel-powered vehicle generally includes an MT (manual transmission), an AMT (automatic mechanical transmission), an AT (automatic transmission), a CVT (continuously variable transmission) and a DCT (dual clutch transmission), in which the CVT (continuously variable transmission) is used in more and more vehicles with excellent gear shifting smoothness and fuel economy.
The existing CVT continuously variable transmission mainly has four types of a belt (chain) CVT, a wheel CVT, a toroidal CVT, and a ball CVT.
The belt type (chain type) CVT has the defects that the contact area of a steel belt (or a steel chain) and a transmission conical surface is small, the steel belt (or the steel chain) is easy to slip, the steel belt (or the steel chain) is easy to wear, the steel belt (or the steel chain) can be broken in an extreme state, the transmitted torque is limited, the cost of the steel belt (the steel chain) is high, and the like.
The wheel type CVT has the defects of complex shapes of a driving wheel, a driven wheel and a speed change roller, high machining precision requirement, complex angle control of the speed change roller, high cost and the like.
The circular CVT has the defects of small friction contact area of a speed change circular ring, limited transmission torque, incapability of being applied to large automobiles and the like.
The ball CVT is in line contact, the force transmission contact area of the ball CVT is smaller than that of the ball CVT in the scheme, the machining precision requirement of a transmission part is higher, and the application scene of the ball CVT is greatly limited.
CTV infinitely variable transmission among the prior art all has the defect of contradiction between unable balanced "transmission moment of torsion", "reliability" and "cost" three, and based on this, the utility model provides a brand-new infinitely variable transmission and gearbox to solve the difficult problem among the prior art.
SUMMERY OF THE UTILITY MODEL
To prior art's defect, the utility model provides a speed change gear and gearbox has that occupation space is little, the reliability is high, advantage with low costs.
In order to achieve the above object, the present invention provides a transmission device, comprising:
a drive bevel gear;
at least one transmission bevel gear meshed with the driving bevel gear, wherein a constant transmission ratio is formed between the transmission bevel gear and the driving bevel gear;
driving the conical disc;
the transmission cone pulley is in contact transmission with the driving cone disc and can shift between the maximum circumference and the minimum circumference of the driving cone disc;
the transmission bevel gear is connected with the transmission bevel wheel through the transmission mechanism;
and
the input shaft is connected with the driving conical disc, and the output shaft is connected with the driving bevel gear; or the input shaft is connected with the driving bevel gear, and the output shaft is connected with the driving bevel disk.
The above technical scheme of the utility model, be frictional contact between drive conical disk and the transmission conical pulley, the drive conical disk has a series of great circumference contact friction surface, the transmission conical pulley has less circumference contact friction surface, the drive conical disk rotates with a certain speed, when the transmission conical pulley is located the less circumference department of drive conical disk, the rotation rate that this transmission conical pulley obtained is less, when the transmission conical pulley is located the great circumference department of drive conical disk, the rotation rate that this transmission conical pulley obtained is great.
Specifically, the stepless speed change process of the whole device can be carried out by adjusting the contact position of the transmission cone pulley and the driving cone disc.
According to another embodiment of the present invention, the axis of the driving cone pulley is perpendicular to the axis of the driving cone disk.
The axis of the drive bevel disk and the axis of the drive bevel gear are preferably parallel or collinear.
According to the utility model discloses a another kind of embodiment, drive conical disc and transmission cone pulley homoenergetic carry out axial displacement.
According to the utility model discloses a another kind of embodiment, drive mechanism further includes integral key shaft, speed governing lead screw and frame, is connected between integral key shaft and the transmission bevel gear, and the speed governing lead screw sets up to parallel with the integral key shaft, and the transmission bevel gear sets up in the frame, and the frame sets up on the integral key shaft rotatably-slidingly to the drive is connected between frame and the speed governing lead screw.
According to another embodiment of the present invention, the transmission mechanism has more than two transmission bevel gears, and the transmission mechanism further includes more than two driven bevel gears and a driving bevel gear for driving the driven bevel gears to rotate;
the number of the driven bevel gears is the same as that of the transmission bevel gears and corresponds to that of the transmission bevel gears one by one, and each driven bevel gear is respectively connected with different speed regulation screw rods;
the driven bevel gear is meshed with the driving bevel gear.
According to another specific embodiment of the present invention, the two or more transmission cone pulleys are distributed in an array or in a relative manner with the axis of the driving cone disk as the center;
the relative distribution here is, for example, distributed in groups or distributed in other regular patterns.
According to the utility model discloses a another kind of embodiment replaces the speed governing lead screw with the speed governing slider that has the terminal surface screw thread, and the speed governing slider in this scheme is terminal surface screw thread pair with the drive mode of frame.
The utility model discloses provide a gearbox simultaneously, it includes at least a set of aforementioned speed change gear.
The utility model discloses possess following beneficial effect:
the utility model does not use flexible transmission elements such as steel belts, steel chains or belts, can bear large torque load, and has no risk of fracture of the flexible transmission elements;
compared with other technical schemes in the prior art, the friction transmission pair formed by the friction contact between the driving conical disc and the transmission conical wheel has the advantages of large friction contact area, reliable transmission and difficult slipping and abrasion;
the utility model adopts the screw rod pair or the end face thread pair as the speed regulation operation structure, can realize pure mechanical speed regulation control, does not need precise parts such as a hydraulic electromagnetic valve slide valve box and the like, has lower requirement on the cleanliness of oil liquid, and can greatly reduce the problem of electromagnetic valve core faults caused by oil liquid magazines;
the utility model does not need a metal transmission belt with complex process and high cost in the chain type CVT stepless speed changer, simultaneously has the advantages of simple structure and low manufacturing cost, and is particularly suitable for occasions with small torque;
the utility model discloses can show when promoting gearbox life-span and reliability and reduce spare part quantity and cost, make gearbox overall cost show the reduction, be favorable to the extensive popularization and application in market.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the mechanism of embodiment 1 of the transmission of the present invention;
fig. 2 is a schematic view of the contact position of the driving cone disk and the plurality of transmission cone pulleys in the embodiment of the speed changing device of the present invention;
fig. 3 is a schematic structural view of a frame in embodiment 1 of the transmission of the present invention;
fig. 4 is a schematic view of a matching structure of a drive bevel gear and a plurality of driven bevel gears in embodiment 1 of the transmission of the present invention;
fig. 5 is a schematic diagram of a transmission according to embodiment 2 of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Example 1
A transmission, as shown in fig. 1-4, includes an input mechanism 10, a drive bevel gear 20, a plurality of drive bevel gears 30, a drive bevel disk 40, a plurality of drive bevel gears 50, a transmission mechanism 60, and an output mechanism 70.
The input mechanism 10 includes an input shaft 11 and other linkage structures, a driving bevel gear 20 is connected to the input shaft 11 and driven by the input shaft 11 to rotate according to a set input speed, a plurality of transmission bevel gears 30 are respectively engaged with the driving bevel gear 20, and the plurality of transmission bevel gears 30 are preferably distributed in an array manner, and a constant transmission ratio, for example, a transmission ratio of 3, is provided between the plurality of transmission bevel gears 30 and the driving bevel gear 20.
Specifically, the driving bevel gear 20 and the transmission bevel gear 30 are right angle bevel gears.
The axis of drive bevel disk 40 is preferably parallel to the axis of drive bevel gear 20, and drive bevel wheel 50 is in contact with drive bevel disk 40 for driving movement between a maximum circumference and a minimum circumference of drive bevel disk 40, wherein the axis of drive bevel wheel 50 is perpendicular to the axis of drive bevel disk 40.
More specifically, the driving conical disc 40 can axially displace leftwards or rightwards, the transmission conical pulley 50 can axially displace upwards or downwards, the transmission conical pulley 50 is connected with the transmission bevel gear 30 through the transmission mechanism 60, the output mechanism 70 comprises an output shaft 71 and other linkage structures, the transmitted rotating speed is changed by adjusting the contact position of the transmission conical pulley 50 and the driving conical disc 40, the rotating speed of the output shaft 71 is changed, and the stepless speed change process is completed.
As shown in fig. 3, the transmission mechanism 60 includes a spline shaft 61, a speed regulation screw 62, a frame 63, a first spur gear 64, and a second spur gear 65.
The first straight gear 64 is rotatably provided on the frame 63 through a rotating shaft 66, the driving bevel gear 50 is provided at the end of the rotating shaft 66 and rotates synchronously with the first straight gear 64, the frame 63 is rotatably-slidably provided on the spline shaft 61, the second straight gear 65 is provided on the spline shaft 61 and the first straight gear 64 and the second straight gear 65 are engaged with each other;
the speed regulation screw rod 62 is arranged to be parallel to the spline shaft 61, the rack 63 is in driving connection with the speed regulation screw rod 62, the rack 63 and the transmission cone pulley 50 on the rack 63 can be driven to move upwards or downwards through rotation of the speed regulation screw rod, so that the transmission cone pulley 50 can move between the maximum circumference and the minimum circumference of the transmission cone pulley 40 in cooperation with the right or left driving cone pulley 40.
In this embodiment, a plurality of sets of transmission mechanisms 60 may be provided to perform the synchronous displacement of the plurality of transmission bevel gears 50, wherein the number of the transmission bevel gears 50 and the transmission bevel gears 30 is the same, for example, eight transmission bevel gears 50 shown in fig. 2, and further for example, six transmission bevel gears 30 shown in fig. 4.
As shown in fig. 4, the tail end of each speed-regulating screw 62 is provided with a driven bevel gear 67, and six driven bevel gears 67 are connected with a driving bevel gear 68, so that when one speed-regulating screw 62 rotates, power is transmitted by matching between the driving bevel gear 68 and the driven bevel gear 67, and synchronous rotation of the six speed-regulating screws 62 is realized; or when the driving bevel gear 68 rotates, the six driven bevel gears 67 are driven to synchronously rotate to respectively drive the speed adjusting screw rods 62 to rotate, so that the six transmission bevel gears 50 are shifted upwards or downwards.
The power transmission process in this embodiment is:
The preferred shifting process in this embodiment is (taking the adjustment from the highest speed to the lowest speed as an example):
while the driving conical disc 40 slides to the right under the driving of the hydraulic cylinder 12, the driving bevel gear 68 rotates → the transmission bevel gear 30 rotates to drive the speed adjusting screw 62 to rotate → the frame 63 descends → the transmission conical wheel 50 descends while maintaining the contact friction with the driving conical disc 40 → the rotating speed is reduced.
The other components and connection relationships related to fig. 1 in this embodiment are applicable to the prior art, for example, the driving conical disk 40 is connected with the input shaft 11 by the spline sleeve 13, a transmission structure and a differential 14 exist between the driving conical disk 40 and the output shaft 71, and the related clutch 15, the clutch input shaft 16, the reverse gear 17, the synchronizer ring 18, the starting forward gear 19 and the like are provided.
Example 2
The present embodiment provides a speed change device, as shown in fig. 5, which is different from embodiment 1 in that a speed regulation screw rod is replaced by a speed regulation slide block 69 with end face threads in a transmission mechanism, and an end face thread pair is formed between the speed regulation slide block 69 and a frame 63.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art can make some modifications without departing from the scope of the invention, i.e. all equivalent modifications made according to the invention are intended to be covered by the scope of the invention.
Claims (8)
1. A transmission device, characterized by comprising:
a drive bevel gear;
at least one transmission bevel gear meshed with the driving bevel gear, wherein a constant transmission ratio is formed between the transmission bevel gear and the driving bevel gear;
driving the conical disc;
a transmission cone pulley in contact transmission with the drive cone disc, the transmission cone pulley being displaceable between a maximum circumference and a minimum circumference of the drive cone disc;
the transmission bevel gear is connected with the transmission bevel gear through the transmission mechanism;
and
the input shaft is connected with the driving conical disc, and the output shaft is connected with the driving bevel gear; or the input shaft is connected with the driving bevel gear, and the output shaft is connected with the driving bevel disk.
2. The transmission of claim 1, wherein the axis of the drive cone pulley is perpendicular to the axis of the drive cone disk.
3. The transmission of claim 2, wherein the drive cone disc and the drive cone pulley are each axially displaceable.
4. The transmission of claim 1, wherein the transmission mechanism includes a spline shaft connected to the drive bevel gear, a speed adjustment screw disposed in parallel with the spline shaft, and a frame on which the drive bevel gear is disposed, the frame being rotatably-slidably disposed on the spline shaft, and the frame being drivingly connected to the speed adjustment screw.
5. The transmission of claim 4, wherein there are more than two of said drive bevel gears, said drive mechanism further comprising more than two driven bevel gears and a drive bevel gear for driving said driven bevel gears to rotate;
the number of the driven bevel gears is the same as that of the transmission bevel gears, the driven bevel gears correspond to the transmission bevel gears one by one, and each driven bevel gear is connected with different speed regulating screw rods;
the driven bevel gear is meshed with the driving bevel gear.
6. The transmission of claim 5, wherein more than two drive cones are arrayed or distributed relative to each other about an axis of the drive cone.
7. The transmission of claim 4, wherein the speed adjustment screw is replaced with a speed adjustment slide having end threads.
8. A gearbox comprising at least one set of transmission devices according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120374162.7U CN214578665U (en) | 2021-02-10 | 2021-02-10 | Speed changing device and gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120374162.7U CN214578665U (en) | 2021-02-10 | 2021-02-10 | Speed changing device and gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214578665U true CN214578665U (en) | 2021-11-02 |
Family
ID=78316427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120374162.7U Active CN214578665U (en) | 2021-02-10 | 2021-02-10 | Speed changing device and gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214578665U (en) |
-
2021
- 2021-02-10 CN CN202120374162.7U patent/CN214578665U/en active Active
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