CN87208750U - Axial fitting n-n model less gear clearance planet reduction unit - Google Patents
Axial fitting n-n model less gear clearance planet reduction unit Download PDFInfo
- Publication number
- CN87208750U CN87208750U CN 87208750 CN87208750U CN87208750U CN 87208750 U CN87208750 U CN 87208750U CN 87208750 CN87208750 CN 87208750 CN 87208750 U CN87208750 U CN 87208750U CN 87208750 U CN87208750 U CN 87208750U
- Authority
- CN
- China
- Prior art keywords
- gear
- output shaft
- output
- retarder
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Landscapes
- General Details Of Gearings (AREA)
- Retarders (AREA)
Abstract
The utility model relates to an axial fitting N-N model less gear clearance planet reduction unit, which has wide range of transmission ratio and is easy to manufacture. The reduction unit changes the structure of the transmission in order to contain an output shaft by an input eccentric sleeve, which not only realizes the structure of a hollow through hole output shaft, but also shortens axial dimension, reduces weight and can be conveniently sheathed and hanged on a driven main shaft. The reduction unit can be widely used for various machinery devices of national defence, mines, metallurgy, chemical industries, hoisting, transportation, textiles, construction work, food industries, instrumentation manufacturing, etc.
Description
The utility model relates to a kind of shaft-mounted NN type planetary speed reducer with small tooth number difference.
Planetary speed reducer with small tooth number difference is commonly referred to as N type and NN type involute gear planetary reducer.Owing to have series of advantages, planetary speed reducer with small tooth number difference is used increasingly extensive.The existing series product of external as Japan.Domesticly carry out a large amount of theories and experimental study work in recent years, now set about working out series standard.But existing most products all break away to adopt solid output shaft and with two bearings, by means of traditional structural type of base or end flange installation aspect structural design.The major defect of this structure is that axial dimension is bigger, particularly with the form of base, the basis of installation must be arranged.Domestic mechanical design handbook, mechanical engineering manual, the relevant paper of delivering in succession even all quoted most identical structure legends about only two monographs of few tooth difference transmission (" the involute planetary gear gear reducer " published in 1978 and nineteen eighty-two publish Feng Chengzhou professor show " involute planetary gear transmission ") and reflect up to now the structural design state of development of tooth difference transmission less.Though the special case of indivedual holes output is also arranged, had not found the structural design of shaft-mounted planetary speed reducer with small tooth number difference.It is rarely seen in recent years that to have only U.S.'s retarder patent ［ class-mark 74/805, (F16HI/28, № 4235129, application: 78.3.30, № 891759, announce: 80.11.25) ］ be shaft-mounted N type little tooth difference speed reducer.But this design of the power of patenting is owing to the reason of configuration aspects, pitch diameter is restricted, and stressing conditions is not good, and bearing capacity is difficult to improve, and therefore this design can only only be suitable for very low power transmission device with the reason of aspects such as grease lubrication.
Main purpose of the present utility model is to change traditional output shaft in the mode of a side with two bearings, the compression axial dimension, and realization hollow via-hole output shaft structure, the basis is installed in cancellation, for use in noria, multiple machinery such as adhesive tape and platform conveyer, thus simplify and reduce drive unit.
Transmission principle of the present utility model is all realized slowing down by engagement garden stud wheel transmission in the few tooth difference of secondary as shown in figures 1 and 3, so be referred to as the few tooth difference transmission of NN type.Wherein Figure 1 shows that external gear output, be applicable to the occasion of velocity ratio≤30; Figure 3 shows that internal gear output, its gear range are 30～100 to be advisable, be used for transmitting movement even can be up to 10000.If the number of teeth of each gear is respectively Z
1, Z
2, Z
3, Z
4(seeing Fig. 1 and Fig. 3), input shaft represent that with H then the velocity ratio calculating formula of Fig. 1 and Fig. 3 is: i
H1=(Z
1Z
3)/(Z
1Z
3-Z
2Z
4)
The utility model is made up of basic parts such as input eccentric shaft, hollow via-hole output shaft, casing, case lid, through hole end cap, fixed annulus, duplicate gear, output gear, bearing, Vee pulley V and balancer weights.Basic characteristics of the present utility model are:
(1) output shaft is the via hollow axle that has flat key groove or internal spline.This through hole is inserted in driven main shaft and static housing, can passes through the key connecting transferring power; Also can adopt the keyless transferring power of coming.
(2) input shaft is real in containing the hollow eccentric bushing of output shaft, and by placing two of endoporus or a needle bearing to be supported on the hollow output shaft.The input eccentric bushing is supported on the outer garden cylinder and the endoporus decentraction at output shaft position, has an eccentric distance e.A needle bearing is installed on its outer garden cylinder, two rollers or ball bearing also can be installed.Suit compound planet gear on the cylinder of the outer garden of bearing.The external tooth of planet wheel and fixed annulus engagement constitute first pair of gear pair.At another of outlet side gear pair is had two kinds of forms, a kind of is internal tooth and the external gear engagement that places on the output shaft on the planet wheel, constitutes external gear output NN type transmission (seeing Fig. 1 and Fig. 2); Another kind is that the external tooth on the planet wheel constitutes internal gear output NN type transmission (seeing Fig. 3 and Fig. 4) with placing the internal tooth engagement on the output shaft.
(3) for ease of installing and saving good material, fixed annulus makes one separately, and is incorporated into casing, case lid handle with bolt.
(4) in order to shorten axial dimension, weight reduction also improves the stressing conditions of part, with pack into input eccentric bushing and the two is linked up with bolt of Vee pulley V wheel hub.
(5) for ease of adjusting the equilibrium block quality, be placed on the outside of v belt spoke plate.
(6) for obtaining favorable manufacturability, output gear makes one separately, is sleeved on the output shaft by key or interference fit joint.
(7) fixed annulus, casing, case lid support to respectively on eccentric bushing and output gear or the output shaft with two bearings closing the back with bolt.
(8) for improving the process industrial art performance of part, each bearing all adopts circlip to fix and do not make on relevant part and fixedly use rib.
Provide the application example of external gear output (Fig. 2) and internal gear output (Fig. 4) below respectively, further specify concrete structure of the present utility model.Fig. 2 and shown in Figure 4ly be axial section of the present utility model.
Input eccentric bushing 3 is by placing its endoporus, and two needle bearings 22 that separate with isolation lasso 27,28 are supported on the hollow output shaft 33.The outer ring of outlet side needle bearing 22 and inner ring are established circlip for hole 31 and setting sleeve 32 respectively, in case the bearing string is moving.Eccentric bushing 3 is installed the outer garden cylinder and output shaft 33 decentraction at needle bearing 22 positions, departs from one apart from e.Needle bearing (or roller and ball bearing) 26 is installed, suit compound planet gear 4 on its outer ring on the cylinder of eccentric outer garden.Bearing 26 is to adopt the two ribs of outer astragal, and the interior astragal single block border also long garden of the 30400 types post roller bearing with loose rib is more suitable, but the present domestic product that can Gong select for use that still do not have.Adopted the needle bearing of the two ribs of only outer astragal herein.Moving for preventing the double-planetary gear string, door 25 and circlip for hole 24 are established in the outer ring, respectively establish a back-up ring 23 in the both sides of the outer garden of eccentric bushing 3 cylinder upper bearing (metal) 26 simultaneously, and fix with circlip for shaft 30.Because therefore bearing 26 cycle surfaces and 23 needs certain intervals of back-up ring need have a very thin packing ring 29 in bearing 26 inner ring ends.The external tooth of double-planetary gear 4 input sides and fixed annulus 5 engagements.The external tooth (Fig. 2) on the internal tooth of outlet side and the output shaft or the external tooth of outlet side are meshed with internal tooth (Fig. 4) on the output shaft.Case lid 9 usefulness the stay bolts 6 of fixed annulus 5 and casing 2 that is positioned at outlet side and input side and packing ring 7, nut 8 handles close fixing, and are supported on output gear 1 and the eccentric bushing 3 with 2 bearings 20.The Internal and external cycle of bearing uses circlip for shaft 19 and circlip for hole 21 and through hole lid 11 fixing respectively, to keep changeless relative position between each part.On the through hole lid 11 usefulness bolts 10 on casing 2 and case lid 9.Install oil sealing 15 and 16 respectively in this two through holes lid and eccentric bushing 3 endoporus, in case leak-stopping oil.Output gear 1 cover installs on the outer garden cylinder of output shaft 33, and both are fixing with flat key 34, also available interference fit joint.The wheel hub of Vee pulley V 14 inserts in the concentric endoporus of eccentric bushing 3 and output shaft 33, and fixes with bolt 18 and packing ring 17.For the inclined to one side quality of balance retarder inside and be convenient to adjust, install balancer weight 12 in the belt pulley 14 disc outside and fix with bolt 13.
Power is passed to eccentric bushing through Vee pulley V, and the eccentric bushing rotation just makes compound planet gear center on main axis (input and output) and revolution of axis own and rotation.Because external gear all has the number of teeth poor in two pairs of gear pairs of retarder, so the NN type engaging gear mechanism that is made of two pairs of gear pairs makes differential motion.Final retarded motion is through placing the output gear output on the output shaft.It is zero that the gear pair of outlet side also can be designed to number of teeth difference, and visual this NN type transmission this moment is the N type transmission with zero teeth difference type output mechanism.
When transferring power, reduction case will rotate because of bearing torque, therefore need the screw by casing outlet side end, link with the fixedly support of bolt with casing and driven equipment.Perhaps, also can on the cylinder of the outer garden of the utility model reduction case, make a pair of ears or side handles of a utensil, overcome running torque (Fig. 5) with pull bar.In addition, where necessary, also can make screw, carry out axial restraint, axial motion take place on the main shaft later on to prevent that retarder is set to be driven with bolt and gland at driven spindle nose.
With the utility model (Fig. 2, Fig. 4) when being used for transmission device, its resultant gear ratio should be the velocity ratio i of retarder itself
H1With its Vee pulley V 14 be not included in the product of the velocity ratio of the v belt transmission that the utility model constitutes with interior active Vee pulley V.Like this, at velocity ratio i of the present utility model
H1Under the fixing situation, also can obtain various resultant gear ratios by the diameter that changes the active Vee pulley V.The utility model also can be designed to other form.For example, on case lid 9, make flange, and the input end of eccentric bushing 3 is made gear coupling, spline or adopts other connection form, just can be with drive motor and the utility model direct connection.Output terminal at casing also can make big flange, so that and working machine direct connection.
The geometry of the utility model gear pair and intensity calculate with general tooth difference transmission less there is not what difference, can carry out with reference to interrelated data; Remaining parts also adopts mechanical parts to use computational methods always, need not to give unnecessary details.
Integrate, compare with existing planetary speed reducer with small tooth number difference, the utlity model has following advantages or good effect.
(1) owing to realized shaft-mounted new construction, not only installation and maintenance are convenient, and thereby cancelled the basis is installed.
(2) because the utility model has changed the traditional mounting means of output shaft, make its structure very compact, axial dimension shortens greatly.
(3) in the utility model application example, owing to adopting pulley concial disk to be convenient to adjust arbitrarily gearratio. Simultaneously, because the particular design of pulley concial disk, its axial dimension also is able to further compression.
(4) because the utility model changes input eccentric shaft traditional in the few teeth difference transmission into eccentric bushing, this adopts the motor direct connection to bring great convenience, because the input of eccentric bushing can be taked different connection forms easily.
(5) owing to the utility model is not taked to acquire a certain degree of difficulty or the pin type that comparatively bothers, the disc type of floating, slide block type or zero tooth differential (need make tangent modification) output mechanism in processing intentionally, directly realize slowing down and power output by gear, thereby the utility model is minimum to the requirement of processing aspect, the easiest popularization. Except eccentric bushing processing slightly complicated, remaining parts does not all have difficulty. For Gear Processing, a Y54A type gear shapping machine just can satisfy the generally processing request of product commonly used of the utility model.
(6) because the utility model is placed on the outside of belt pulley disc with balance weight, carries out balance during for assembling and bring great convenience.
(7) compare with the N-type shaft-setting speed reducer of aforementioned acquisition United States Patent (USP) power, the utility model thereby can transmit bigger power because advantage and the available lubricating oil of structural design aspect own lubricate.
(8) because the utility model structural design compactness is all further compressed its volume and weight.
Claims (8)
1, a kind ofly pay the shaft-mounted NN type that constitutes little differential teeth planetary retarder by two inside engaged gears, this retarder is made up of basic parts such as fixed annulus, double-planetary gear, output gear, output shaft, input eccentric shaft, casing, case lid, Vee pulley V, balancer weight, spring bearings.It is characterized in that output shaft is the hollow via-hole output shaft, input shaft is for containing the hollow eccentric bushing of output shaft, and the bearings by placing its endoporus is on hollow output shaft.Eccentric bushing is supported on the outer garden cylinder and the endoporus decentraction at output shaft position, has an eccentric distance e.A needle bearing is installed, suit compound planet gear on the cylinder of the outer garden of bearing on the eccentric outer garden cylinder.The external tooth of planet wheel and fixed annulus engagement constitute first pair of gear pair.Another gear of double-planetary gear and output gear engagement constitute the transmission of gear output NN type.Fixed annulus, casing, case lid, support to respectively on eccentric bushing and the output gear with two bearings after closing with bolt.
2, retarder according to claim 1, another that it is characterized in that outlet side is internal gear on the planet wheel and the external gear engagement that places on the output shaft to one of gear pair form, constitutes the transmission of external gear output NN type.
3, retarder according to claim 1, another is external gear on the planet wheel and the internal gear engagement that places on the output shaft to two of gear pair form to it is characterized in that outlet side, constitutes the transmission of internal gear output NN type.
4,, it is characterized in that fixed annulus makes one separately, and put together between casing, the case lid with bolt according to any described retarder in the claim 1 to 3.
5,, it is characterized in that the Vee pulley V wheel hub input eccentric bushing of packing into, and the two is linked up with bolt according to any described retarder in the claim 1 to 3.
6, according to any described retarder in the claim 1 to 3, it is characterized in that equilibrium block is placed the outside of v belt spoke plate, adjust when assembling with facility.
7,, it is characterized in that output gear makes one separately, installs on the output shaft by the key connecting cover according to any described retarder in the claim 1 to 3.
8,, it is characterized in that output gear unit solely makes one, installs on the output shaft by the interference fit joint cover according to any described retarder in the claim 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208750 CN87208750U (en) | 1987-05-31 | 1987-05-31 | Axial fitting n-n model less gear clearance planet reduction unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208750 CN87208750U (en) | 1987-05-31 | 1987-05-31 | Axial fitting n-n model less gear clearance planet reduction unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87208750U true CN87208750U (en) | 1988-07-06 |
Family
ID=4823967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87208750 Withdrawn CN87208750U (en) | 1987-05-31 | 1987-05-31 | Axial fitting n-n model less gear clearance planet reduction unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87208750U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362262C (en) * | 2005-06-10 | 2008-01-16 | 闫春高 | Power take-off of gearbox in garden supervisor |
| CN102417133A (en) * | 2011-12-09 | 2012-04-18 | 浙江西子富沃德电机有限公司 | Elevator traction machine |
| CN110360274A (en) * | 2019-07-22 | 2019-10-22 | 孙金曦 | Planetary speed reducer with small tooth number difference |
-
1987
- 1987-05-31 CN CN 87208750 patent/CN87208750U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362262C (en) * | 2005-06-10 | 2008-01-16 | 闫春高 | Power take-off of gearbox in garden supervisor |
| CN102417133A (en) * | 2011-12-09 | 2012-04-18 | 浙江西子富沃德电机有限公司 | Elevator traction machine |
| CN110360274A (en) * | 2019-07-22 | 2019-10-22 | 孙金曦 | Planetary speed reducer with small tooth number difference |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2620133Y (en) | Double crank ring-plate type cycloid pinwheel planetary speed reducer | |
| CN109899478A (en) | A kind of high-precision planet few teeth difference twin-differential deceleration mechanism | |
| CN109823976B (en) | Accurate high-efficient electronic reel | |
| CN210034325U (en) | High-precision planetary small-tooth-difference double-differential speed reducing mechanism | |
| CN1018567B (en) | Mixed few-differential spider reducer and speed variator | |
| CN2856582Y (en) | Multi-axis balancing internal circular board small gear tolerence speed reducer | |
| CN2195656Y (en) | Toothed planet-gear speed reducer | |
| CN205350242U (en) | No return difference single -stage cycloid awl tooth reduction gear | |
| CN210559044U (en) | Precise and efficient electric winding drum | |
| CN87208750U (en) | Axial fitting n-n model less gear clearance planet reduction unit | |
| CN218882976U (en) | Mining integral large-speed-ratio inner three-ring speed reduction transmission mechanism | |
| CN1048744A (en) | Double-layer gear combination transmission | |
| CN2497108Y (en) | Compound planetary reductor | |
| CN1069748C (en) | Synthetic speed reducing driving device | |
| CN101117997A (en) | Internal tricyclic decelerator | |
| CN87209455U (en) | Muff, free teeth, short of teeth differential gearing | |
| CN2242368Y (en) | Inner horizontal movement teeth wheel speed-changing device | |
| CN2246215Y (en) | Synthetic speed reducing driving gear | |
| JPS61184250A (en) | Reduction gear | |
| CN2296419Y (en) | New structure driver of single screw oil submersible pump | |
| CN2085446U (en) | Internal intermeshing planet transmission | |
| CN2247253Y (en) | Synthetic speed reducer | |
| CN2566053Y (en) | Coaxial multicrank a few gear different speed reducer | |
| CN1062407A (en) | A kind of internally engaged planetary driving machanism of new structure | |
| CN2742233Y (en) | Internal gear plate type planet gear driving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |