GB2161887A

GB2161887A - Epicyclic planetary gear transmission

Info

Publication number: GB2161887A
Application number: GB08418130A
Authority: GB
Inventors: Claude Simpson
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-07-17
Filing date: 1984-07-17
Publication date: 1986-01-22
Also published as: GB8418130D0

Abstract

An epicyclic transmission in which the ring gear comprises a plurality of circumferentially spaced rollers (2) mounted on pins (3) in an annular member (1) and the sun comprises a plurality of rollers (10) mounted in a holder (9). A plurality of planet gears (5) in the form of sprockets are mounted on a carrier (4) via headed pins (7) and bearings (6). Also disclosed (See Figs. 2/3) in an arrangement for coupling together two coaxial shafts utilizing rollers (2) cooperating with sprockets (4) mounted on the respective shafts; the rollers (2) are carried by a housing (1) surrounding the shaft ends. In a further disclosure (Fig. 3/3) an eccentrically mounted sprocket (4) meshes with a surrounding ring gear whose teeth comprise freely rotatable rollers (2). <IMAGE>

Description

SPECIFICATION Epicylic transmission This relates to a method of using sprockets and rollers for the application of epicyclic transmission, Fig. 1/3. The same method is used for a Coupling, Figure 2/3 and also for an Eccentric, Fig. 3/3. Epicyclic gearing is a common method of obtaining various gear ratios in a small space. The usual form of using gears means that when worn, they are scrapped. With this method, the unit can be refurbished. The method of lubrication can also be simplified.

The method shown in Fig. 1/3 uses standard sprockets (single, double or triple) running into rollers. These units can be made in various materials or combination of materials. The design is based on the standard epicyclic principle of a ring, planets fitted to a carrier and a centre sun wheel. Any of the three units can be driven or clutched as per the chart: POSSIBLE DRIVE COMBINATIONS INPUT HOLD OUTPUT DIRECTION DRIVE 1 Sun Ring Carrier Same Under 2 Ring Sun Carrier Same Under 3 Carrier Ring Sun Same Over 4 Carrier Sun Ring Same Over 5 Sun Carrier Ring Reverse Under 6 Ring Carrier Sun Reverse Over 7 2 Elements locked together Same Direct Fig. 1/3 shows the epicylic principle comprising the following specification:: 1 Ring Roller Carrier 2 Ring Roller 3 Ring Roller Pin 4 Sprocket Carrier 5 Sprocket 6 Sprocket Bearing 7 Sprocket Securing Pin 8 Sprocket Securing Pin Nut 9 Sun Roller Carrier 10 Sun Roller 11 Sun Roller Pin 1 2 Locking Plate 1 3 Locking Plate Screw Fig. 2/3 shows the Coupling comprising the following specification: 1 Coupling Housing 2 Roller 3 Roller Pin 4 Sprocket 5 End Plate Fig. 3/3 shows an Eccentric movement comprising the following specification: 1 Housing 2 Roller 3 Roller Pin 4 Sprocket

CLAIMS 1. Fig. 1/3: An Epicyclic Transmission using sprockets and rollers in place of gears. Ring rollers are mounted on the ring roller carrier secured with pins which are riveted to the ring roller carrier. Three sprockets are mounted on the sprocket carrier. The sprockets run on bearings and held in position with a sprocket securing pin secured with a nut. The sun wheel comprises a sun roller carrier on which is mounted the sun rollers secured with sun roller pins riveted to the sun roller carrier. A locking plate holds the rollers in position. This locking plate is secured to the sun roller carrier with screws.

2. An Epicyclic Transmission as claimed in Claim 1, wherein rollers are mounted on a ring

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Epicylic transmission This relates to a method of using sprockets and rollers for the application of epicyclic transmission, Fig. 1/3. The same method is used for a Coupling, Figure 2/3 and also for an Eccentric, Fig. 3/3. Epicyclic gearing is a common method of obtaining various gear ratios in a small space. The usual form of using gears means that when worn, they are scrapped. With this method, the unit can be refurbished. The method of lubrication can also be simplified. The method shown in Fig. 1/3 uses standard sprockets (single, double or triple) running into rollers. These units can be made in various materials or combination of materials. The design is based on the standard epicyclic principle of a ring, planets fitted to a carrier and a centre sun wheel. Any of the three units can be driven or clutched as per the chart: POSSIBLE DRIVE COMBINATIONS INPUT HOLD OUTPUT DIRECTION DRIVE 1 Sun Ring Carrier Same Under 2 Ring Sun Carrier Same Under 3 Carrier Ring Sun Same Over 4 Carrier Sun Ring Same Over 5 Sun Carrier Ring Reverse Under 6 Ring Carrier Sun Reverse Over 7 2 Elements locked together Same Direct Fig. 1/3 shows the epicylic principle comprising the following specification::

1 Ring Roller Carrier

2 Ring Roller

3 Ring Roller Pin

4 Sprocket Carrier

5 Sprocket

6 Sprocket Bearing

7 Sprocket Securing Pin

8. An Epicyclic Transmission as claimed in Claim 7 wherein the sun rollers are secured with pins riveted to the sun roller carrier and the locking plate.

Fig. 2/3: A Coupling, using sprockets and rollers. Two shafts are coupled together by means of sprockets and rollers. Single, double or triple sprockets are fixed to the shafts which are to be coupled. The coupling housing is fitted with rollers which are secured with roller pins riveted to the housing. An end plate encloses the assembly and the pins are riveted to this end plate which is secured to the coupling housing with screws.

Fig. 3/3: An Eccentric movement using sprockets and rollers. This comprises a sprocket running in a housing fitted with rollers and secured with pins riveted to the housing. A sprocket mates with the rollers which will give an eccentric movement of the sprocket or the housing.

8 Sprocket Securing Pin Nut

9 Sun Roller Carrier

10 Sun Roller

11 Sun Roller Pin 1 2 Locking Plate 1 3 Locking Plate Screw Fig. 2/3 shows the Coupling comprising the following specification:

1 Coupling Housing 2 Roller 3 Roller Pin 4 Sprocket 5 End Plate Fig. 3/3 shows an Eccentric movement comprising the following specification:

1 Housing 2 Roller 3 Roller Pin 4 Sprocket

2. An Epicyclic Transmission as claimed in Claim 1, wherein rollers are mounted on a ring roller carrier.

3. An Epicyclic Transmission as claimed in Claim 2, wherein the ring rollers are secured with pins riveted to the ring roller carrier.

4. An Epicyclic Transmission as claimed in Claim 1, wherein three sprockets are mounted on a carrier so as to mate with rollers fixed in the ring roller carrier and rollers fixed in the sun roller carrier.

5. An Epicyclic Transmission as claimed in Claim 4, wherein three sprockets are secured to the sprocket carrier with pins which carry bearings for the sprockets and secured with nuts.

6. An Epicyclic Transmission as claimed in Claim 4 wherein rollers are mounted in the sun roller carrier.

7. An Epicyclic Transmission as claimed in Claim 6, wherein the sun rollers are secured in a locking plate which also facilitates assembly and held in position with four screws.