CN2670672Y - Mechanical double-screw transmission variator - Google Patents
Mechanical double-screw transmission variator Download PDFInfo
- Publication number
- CN2670672Y CN2670672Y CNU2003201108190U CN200320110819U CN2670672Y CN 2670672 Y CN2670672 Y CN 2670672Y CN U2003201108190 U CNU2003201108190 U CN U2003201108190U CN 200320110819 U CN200320110819 U CN 200320110819U CN 2670672 Y CN2670672 Y CN 2670672Y
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- screw
- transmission
- gear shift
- shift device
- mechanical double
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Abstract
The utility model discloses a mechanical double-screw transmission variator, which is composed of a casing (1), and input shaft (2), a middle shaft (3), an output shaft (4), driving transmission screws and a driven transmission screw assembly which are engaged with each other, and a bearing (5). A screw transmission pair is arranged in the casing, two driving transmission screws are arranged on the input shaft (2), wherein, one of the driving transmission screw is a driving transmission left-handed screw (6), and the other one of the driving transmission screw is a driving transmission right-handed screw (7); the two ends of the middle shaft (3) are respectively provided with one driven transmission screw, wherein, one of the accessory driving screw is an accessory driving left-handed screw (8), and the other one of the driven transmission screw is a driven transmission right-handed screw (9); the driving transmission screw on the input shaft (2) is engaged with the driven transmission screw on the middle shaft (3); the middle of the middle shaft (3) is provided with a couple of driving transmission double-handed screws (10), (11), and engaged with a couple of driven transmission double-handed screws (12), (13). The utility model which has higher transmission efficiency can be designed into two states of the invertible transmission and the irreversible transmission, and can be applied to each mechanical transmission field.
Description
Technical field
The utility model relates to a kind of mechanical double-screw transmission gear shift device.
Background technique
Present widely used standard involute cylindrical gear driving mechanism, let it be to the greatest extent, and efficiency of transmission is higher, but does not have auto-lock function.And the efficiency of transmission of Worm and worm-wheel gearing with auto-lock function is not high, and its use is subjected to certain restriction.Both processed complexs, cost is bigger.
Summary of the invention
For addressing the above problem, the utility model provide a kind of efficiency of transmission high, processing mechanical double-screw transmission gear shift device easy, with low cost.
The technical solution of the utility model is: it is mainly formed by casing, input shaft, jack shaft, output shaft, intermeshing main transmission screw rod with from drive screw group and bearing pack, screw drive is paid and is located in the casing, it is characterized in that input shaft is provided with two main transmission screw rods, one is the main transmission left handed screw, and another is the main transmission right handed screw; The jack shaft two ends respectively are provided with one from drive screw, and one is from the transmission left handed screw, and another is from the transmission right handed screw; Being meshed on main transmission screw rod and the jack shaft on the input shaft from drive screw; Be provided with a pair of main transmission bispin screw rod in the middle of the jack shaft, and be meshed from transmission bispin screw rod with a pair of of output shaft; Also can adopt multistage transmission as above to pay structure.
Velocity ratio is the ratio that screw rod is paid a number, when transmission is reversible state, the velocity ratio of twin-screw equal in the main driven screw footpath than; When transmission is irreversible state, the velocity ratio of twin-screw be not equal in the main driven screw footpath than, the profile of tooth of drive screw is that involute is trapezoidal, triangle or rectangle, drive screw is single head or bull, the master and slave drive screw of two couples of engagement is the dual rotary direction each other, driving mechanism also can be paid the combination of paying with ordinary gear for twin-screw, and when transmission was irreversible transmission, the main driven screw lead angle can design at screw thread below the locking angle.
The kinology that the mechanical double-screw transmission is paid is paid different with dynamics with the ordinary gear transmission, when it is in irreversible transmission, it is unequal with the ratio in footpath wherein that screw rod is paid velocity ratio, the angle of lead of main driven screw does not wait yet, at this moment, initiatively screw rod can positive and negative direction (or folk prescription to) drives driven screw rod and rotates, and driven screw rod then can not drive initiatively screw drive (positive and negative direction).When initiatively screw rod drives driven screw rod so it has the irreversible feature of this transmission to be, meet law of conservation of energy; Otherwise,, then run counter to law of conservation of energy, so be in self-locking state if driven screw rod can drive initiatively screw rod.In the case, if with the design of the lead angle of main driven screw at screw thread below the locking angle, then initiatively screw rod can only folk prescription to driving driven screw drive.When screw drive is paid when being in the reversible state of transmission, screw rod is paid velocity ratio and is equated that with the ratio in footpath wherein the main driven screw angle of lead also equates.At this moment, initiatively screw rod can drive driven screw rod rotation, and driven screw rod also can drive initiatively screw rod rotation, so it has the reversible feature of this transmission, is that the while is not violated law of conservation of energy again because meet the universal law of ordinary gear transmission this moment.This transmission device, in the rated load of design, but the transmission inverse time is than the transmission efficiency height of common cylinder gear; Transmission efficiency than worm and gear when transmission is irreversible is high, near the transmission efficiency of ordinary gear.Utilize this transmission device, can be designed to the driving mechanism of different progression different drive ratios different capacity sizes, and can be used in combination with the ordinary gear driving mechanism.
Because the screw design of adorning on the transmission shaft becomes left and right a pair of double rotational directions screw rod to reduce end thrust, thereby the bearing at axle two ends is a plain bearing, drive screw requires according to velocity ratio and the through-put power size design is single head or multiple thread screw, also can be designed to single-stage driving or multistage transmission.In addition, also be provided with on the casing to be connected and fixed and use pin.Because this transmission is paid and is not only had the high characteristic of transmission efficiency, have also that volume is little, in light weight, noise is little, the stable transmission advantage, therefore, can replace the ordinary gear transmission, be used for transmission system.The irreversible transmission of mechanical double-screw is paid, and when being used for lifting appliance, can save break, improves reliability.What especially will emphatically point out here is: it is used on the lifting appliance, rising hoisting heavy transmission efficiency is near ordinary gear, and during decline movement weight, prime mover almost operates in unloaded state, this moment, input shaft was as long as very little moment just can drive the output shaft load operation, just can obtain big moment (depending on load weight and output shaft radius) at the output axle head, promptly have the mechanical output enlarge-effect.Particularly use it on the aerospace craft, can reach weight reduction, reduce volume, improve the purpose of aircraft transport capacity.The transmission of the utility model mechanical double-screw transmission gear shift device is paid has following characteristics:
1, the transmission of the utility model mechanical double-screw transmission gear shift device is paid when being designed to irreversible transmission, and the velocity ratio that screw drive is paid does not wait with the ratio in footpath wherein, and promptly the angle of lead of driving and driven screw rod does not wait; At this moment, input shaft can be positive and negative or folk prescription rotate to driving output shaft, output shaft then can not drive input shaft and rotate, and promptly is in self-locking state;
2, but the transmission of the utility model mechanical double-screw transmission gear shift device is paid and is designed to the transmission inverse time, and screw rod is paid velocity ratio and equaled the wherein ratio in footpath, and promptly the angle of lead of driving and driven screw rod equates; At this moment, input shaft both can drive output shaft and rotate, and output shaft also can drive input shaft and rotate.
3, the transmission of the utility model mechanical double-screw transmission gear shift device is paid and can be designed to three types of deceleration, raising speed and constant speed transmissions as required;
4, the transmission of the utility model mechanical double-screw transmission gear shift device is paid and can be designed to single-stage or multistage transmission as required;
5, the transmission of the utility model mechanical double-screw transmission gear shift device twin-screw engagement process of paying is compared with the ordinary gear engagement process, on one side can designing at node, the Contact Tooth contact points meshes, so energy consumption is little, and the efficient height;
6, the transmission of the utility model mechanical double-screw transmission gear shift device is paid to adopt and is left and rightly revolved the twin-screw transmission, so the engaging tooth contact length is not limited by the gear contact ratio.When realizing the design of transmission system equal strength, this transmission is paid and can be designed smaller and more exquisitely like this, thereby reaches under the situation of transmitting equal-wattage, and it is light that its weight ratio ordinary gear is wanted, and volume is little;
7, the twin-screw transmission of employing is paid in the transmission of the utility model mechanical double-screw transmission gear shift device, there is not Undercutting Phenomenon, and minimum number of screw rod can be 1, and ordinary gear is subjected to the restriction of Undercutting Phenomenon, minimum teeth number is 17, thereby realize under the situation of same velocity ratio that it is light and handy that the ordinary gear structure compared is paid in this transmission;
8, to pay its processing method of used screw rod different fully with ordinary gear in the transmission of the utility model mechanical double-screw transmission gear shift device, ordinary gear will be processed with the higher gear machine of cost, and the screw rod that this transmission is paid is as long as can process with machine tool, the manufacturing efficiency height, easy to process, be beneficial to the assurance precision;
9, the transmission of the utility model mechanical double-screw transmission gear shift device is paid screw design and is become double rotational directions, has improved the mechanical property of transmission system, and axial force is cancelled out each other, and has simplified bearing structure;
10, the utility model mechanical double-screw transmission gear shift device is to be designed by abnormal mechanical power enchancer spare, and its kinology and dynamics and ordinary gear transmission are different, so the design principle of ordinary gear is inapplicable at this;
11, the transmission of the utility model mechanical double-screw transmission gear shift device is paid material therefor and cold and hot working technology does not all have specific (special) requirements, thereby easy to process, cheap.
Description of drawings
Fig. 1 is the utility model twin-screw transmission gear shift device structural representation.
Embodiment
According to shown in Figure 1, the utility model mechanical double-screw transmission gear shift device main structure has casing 1, input shaft 2 is installed on the casing successively, jack shaft 3, output shaft 4, bearing 5 is equipped with at the axle two ends, and bearing 5 is installed on the bearing support of casing 1, and jack shaft 3 can be designed to the multi-change speed transmission shaft according to required velocity ratio or input speed.Be processed with two first order initiatively left handed screw 6 and first order active right handed screw 7 on the input shaft, the driven left handed screw 8 and the driven right handed screw 9 of the first order of first order transmission is equipped with at two on the jack shaft 3; The driven right handed screw 9 of the first order is meshed with first order active left handed screw 6, and the driven left handed screw 8 of first order transmission is meshed with first order active right handed screw 7.Jack shaft 3 middle parts are equipped with two active screw rods of second level transmission, be the active left handed screw 10 and the active right handed screw 11 of second level transmission, two driven screw rods of second level transmission are installed, i.e. the driven left handed screw 12 of second level transmission and the driven right handed screw 13 of second level transmission on the output shaft 4; The driven right handed screw 13 of second level transmission is meshed with the active left handed screw 10 of second level transmission, and the driven left handed screw 12 of second level transmission is meshed with the active right handed screw 11 of second level transmission.Revolve screw rod about jack shaft and transmission, can require to be designed to multistage according to velocity ratio, the drive screw that assembles on same transmission shaft be designed to occur in pairs about revolve screw rod, drive screw requires according to velocity ratio and through-put power can be designed to single-head screw or multiple thread screw.When transmission is reversible state, the velocity ratio of twin-screw equal in the main driven screw footpath than; When transmission is irreversible state, the velocity ratio of twin-screw be not equal in the main driven screw footpath than.When transmission was irreversible transmission, below the locking angle, then input shaft can only rotate by unidirectional drive output shaft the main driven screw lead angle at screw thread, and output shaft can not drive the input shaft rotation.Driving mechanism also can be paid the combination of paying with ordinary gear for twin-screw.The profile of tooth of drive screw is that involute is trapezoidal, triangle or rectangle.
Claims (8)
1, a kind of mechanical double-screw transmission gear shift device, mainly form by casing (1), input shaft (2), jack shaft (3), output shaft (4), intermeshing main transmission screw rod with from drive screw group and bearing (5), screw drive is paid and is located in the casing, it is characterized in that input shaft (2) is provided with two main transmission screw rods, one is main transmission left handed screw (6), and another is a main transmission right handed screw (7); Jack shaft (3) two ends respectively are provided with one from drive screw, and one is from transmission left handed screw (8), and another is from transmission right handed screw (9); Input shaft (2) is gone up being meshed from drive screw on main transmission screw rod and the jack shaft (3); Be provided with a pair of main transmission bispin screw rod (10), (11) in the middle of the jack shaft (3), and be meshed from transmission bispin screw rod (12), (13) with a pair of of output shaft (4); Also can adopt multistage transmission as above to pay structure.
2, mechanical double-screw transmission gear shift device according to claim 1 is characterized in that velocity ratio is the ratio that screw rod is paid a number.
3, mechanical double-screw transmission gear shift device according to claim 1 is characterized in that when transmission is reversible state, the velocity ratio of twin-screw equal in the main driven screw footpath than; When transmission is irreversible state, the velocity ratio of twin-screw be not equal in the main driven screw footpath than.
4, mechanical double-screw transmission gear shift device according to claim 1, the profile of tooth that it is characterized in that drive screw are that involute is trapezoidal, triangle or rectangle.
5, mechanical double-screw transmission gear shift device according to claim 1 is characterized in that drive screw is single head or bull.
6, mechanical double-screw transmission gear shift device according to claim 1 is characterized in that the master and slave drive screw of two couple who meshes dual rotary direction each other.
7, mechanical double-screw transmission gear shift device according to claim 1 is characterized in that driving mechanism can be twin-screw and pays the combination of paying with ordinary gear.
8, mechanical double-screw transmission gear shift device according to claim 1 is characterized in that the main driven screw lead angle can design at screw thread below the locking angle when it is irreversible transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201108190U CN2670672Y (en) | 2003-11-18 | 2003-11-18 | Mechanical double-screw transmission variator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201108190U CN2670672Y (en) | 2003-11-18 | 2003-11-18 | Mechanical double-screw transmission variator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2670672Y true CN2670672Y (en) | 2005-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201108190U Expired - Fee Related CN2670672Y (en) | 2003-11-18 | 2003-11-18 | Mechanical double-screw transmission variator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2670672Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017045316A1 (en) * | 2015-09-18 | 2017-03-23 | 南京大量数控科技有限公司 | Reduction gear device |
-
2003
- 2003-11-18 CN CNU2003201108190U patent/CN2670672Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017045316A1 (en) * | 2015-09-18 | 2017-03-23 | 南京大量数控科技有限公司 | Reduction gear device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050112 Termination date: 20091218 |