Transmission apparatus

Claim 2

A transmission apparatus comprising a main body, a fixed internal gear fixed to said main body, a rotary internal gear provided coaxial with and adjacent to said fixed internal gear and planetary gears engaging said fixed internal gear and said rotary internal gear, characterized in that said rotary internal gear (26) and said fixed internal gear (25) have different number of teeth, and said rotary internal gear (26) is supported so as to rotate around a central axis thereof which is coaxial with a central axis of said fixed internal gear (25); and that a carrier (41) for holding said planetary gears (40) so as to rotate around said central axis of said fixed internal gear (25) and their own axes is supported so as to rotate around a central axis thereof which is coaxial with said axes of said fixed internal gear (25) and said rotary internal gear (26); that a high rotational speed transmitting member (52, 65) is provided for transmitting rotation of said carrier (41); and that a low rotational speed transmitting member (29) is provided for transmitting rotation of said rotary internal gear (26).

Claim 3

A transmission apparatus according to claim 1, characterized in that said carrier (41) is hollow, said high rotational speed transmitting member comprises a hollow high speed shaft (52), and said low rotational speed transmitting member comprises a solid low speed shaft (29) which penetrates said hollow carrier (41) and said high speed shaft (52) and projects from both end faces of said main body (20).

Claim 4

A transmission apparatus according to claim 1, characterized in that a space (G) continuous in a circumferential direction is formed between facing end faces of said fixed internal gear (25) and said rotary internal gear (26), and said high rotational speed transmitting member for transmitting rotation of said carrier (41) comprises flange-like members (65) which extend radially outwardly from an outer peripheral surface of said carrier (41) to outside of said fixed internal gear (25) and said rotary internal gear (26) through said space(G).

Claim 5

A transmission apparatus according to claim 1, characterized in that said carrier (41) is hollow, a sun gear (82) engaging said planetary gears (40) is provided in said hollow carrier (41), and a sun gear shaft (84) for transmitting rotation of said sun gear (82) is provided so as to project from at least one end face of said main body (20).

Claim 6

A transmission apparatus according to claim 3, characterized by further comprising rotary seal members (101, 102) which surround said fixed internal gear (25) and said rotary internal gear (26) and rotate around central axes thereof coaxial with central axes of said fixed internal gear (25) and said rotary internal gear (26).

Claim 7

A transmission apparatus comprising a main body, a fixed internal gear fixed to said main body, a rotary internal gear provided coaxial with and adjacent to said fixed internal gear and planetary gears engaging said fixed internal gear and said rotary internal gear, characterized in that said rotary internal gear (26) and said fixed internal gear (25) have different number of teeth, and said rotary internal gear (26) is supported so as to rotate around a central axis thereof which is coaxial with a central axis of said fixed internal gear (25); and that a hollow carrier (41) for holding said plane­tary gears (40) so as to rotate around said central axis of said fixed internal gear (25) and their own axes is supported so as to rotate around a central axis thereof which is coaxial with said axes of said fixed internal gear (25) and said rotary internal gear (26); and that a low speed shaft (29) for transmitting rotation of said rotary internal gear (26) is provided coaxially therewith so as to penetrate said hollow carrier (41) and project from both end portions of said main body (20).

Claim 8

A transmission apparatus comprising a main body, a fixed internal gear fixed to said main body, a rotary internal gear provided coaxial with and adjacent to said fixed internal gear and planetary gears engaging said fixed internal gear and said rotary internal gear, characterized in that said rotary internal gear (26) and said fixed internal gear (25) have different number of teeth, and said rotary internal gear (26) is supported so as to rotate around a central axis thereof which is coaxial with a central axis of said fixed internal gear (25); and that a hollow carrier (41) for holding said plane­tary gears (40) so as to rotate around said central axis of said fixed internal gear (25) and their own axes is supported so as to rotate around a central axis thereof which is coaxial with said axes of said fixed internal gear (25) and said rotary internal gear (26); and that a low speed shaft (29) for transmitting rotation of said rotary internal gear (26) is provided coaxially therewith so as to penetrate said hollow carrier (41) and project from both end portions of said main body (20).

Claim 9

A transmission apparatus according to claim 6, characterized in that a hollow high speed shaft (52) is provided for transmitting rotation of said carrier (41), and said low speed shaft (29) penetrates said hollow high speed shaft (52) to project from said both end portions of said main body (20).

Claim 10

A transmission apparatus according to claim 6, characterized in that a space (G) continuous in a circumferential direction is formed between facing end faces of said fixed internal gear (25) and said rotary internal gear (26), and flange-like members (65) for transmitting rotation of said carrier (41) are provided so as to extend radially outwardly from an outer peripheral surface of said carrier (41) to outside of said fixed internal gear (25) and said rotary internal gear (26) through said space (G).

Claim 11

A transmission apparatus according to claim 6, characterized in that a sun gear (82) engaging said planetary gears (40) is provided in said carrier (41), and a hollow sun gear shaft (84) is provided for transmitting rotation of said sun gear (82), and said low speed shaft (29) penetrates said hollow sun gear shaft (52) and projects from both end portions of said main body (20).

Claim 12

A transmission apparatus according to claim 6, characterized in that said planetary gears (40) comprise first planetary gears (40a) engaging said fixed internal gear (25) and second planetary gears (40b) engaging said rotary internal gear (26) and each pair of said first planetary gear (40a) and said second planetary gear (40b) are rotatably mounted on the same shaft (44).

Claim 13

A transmission apparatus according to claim 8, characterized by further comprising rotary seal members (101, 102) which surround said fixed internal gear (25) and said rotary internal gear (26) and rotate around central axes thereof coaxial with central axes of said fixed internal gear (25) and said rotary internal gear (26).

Claim 14

A transmission apparatus comprising a main body, a fixed internal gear fixed to said main body, a rotary internal gear provided coaxial with and adjacent to said fixed internal gear and planetary gears engaging sa d fixed internal gear and said rotary internal gear, characterized in that said rotary internal gear (26) and said fixed internal gear (25) have different number of teeth, and said rotary internal gear (26) is supported so as to rotate around a central axis thereof which is coaxial with a central axis of said fixed internal gear (25); that a carrier (41) for holding said planetary gears (40) so as to rotate around said central axis of said fixed internal gear (25) and their own axes is supported so as to rotate around a central axis thereof which is coaxial with said axes of said fixed internal gear (25) and said rotary internal gear (26); that a space (G) continuous in a circumferential direction is formed between facing end faces of said fixed internal gear (25) and said rotary internal gear (26); and that flange-like members (65) for transmitting rotation of said carrier (41) are provided so as to extend radially outwardly from an outer peripheral surface of said carrier (41) to outside of said fixed internal gear (25) and said rotary internal gear (26) through said space(G).

Claim 15

A transmission apparatus comprising a main body, a fixed internal gear fixed to said main body, a rotary internal gear provided coaxial with and adjacent to said fixed internal gear and planetary gears engaging sa d fixed internal gear and said rotary internal gear, characterized in that said rotary internal gear (26) and said fixed internal gear (25) have different number of teeth, and said rotary internal gear (26) is supported so as to rotate around a central axis thereof which is coaxial with a central axis of said fixed internal gear (25); that a carrier (41) for holding said planetary gears (40) so as to rotate around said central axis of said fixed internal gear (25) and their own axes is supported so as to rotate around a central axis thereof which is coaxial with said axes of said fixed internal gear (25) and said rotary internal gear (26); that a space (G) continuous in a circumferential direction is formed between facing end faces of said fixed internal gear (25) and said rotary internal gear (26); and that flange-like members (65) for transmitting rotation of said carrier (41) are provided so as to extend radially outwardly from an outer peripheral surface of said carrier (41) to outside of said fixed internal gear (25) and said rotary internal gear (26) through said space(G).

Claim 16

A transmission apparatus according to claim 12, characterized in that said flange-like members (65) comprise high rotational speed transmitting members, and a low rotational speed transmitting member is provided for transmitting rotation of said rotary internal gear (26).

Claim 17

A transmission apparatus according to claim 12, characterized in that said carrier (41) is hollow, a low rotational speed shaft (29) for transmitting rota­tion of said rotary internal gear (26) is provided coaxially therewith so as to penetrate said hollow carrier (41) and project from both end portions of said main body (20).

Claim 18

A transmission apparatus according to claim 12, characterized by further comprising rotary seal members (101, 102) which surround said fixed internal gear (25) and said rotary internal gear (26) and rotate around central axes thereof coaxial with central axes of said fixed internal gear (25) and said rotary internal gear (26).

Claim 19

A transmission apparatus according to claim 15, characterized in that inner peripheral faces of said rotary seal members (101, 102) face outer peripheral surfaces of said fixed internal gear (25) and said rotary internal gear (26) at a slight spacing so as not to contact each other, said inner peripheral faces of said rotary seal members (101, 102) and/or said outer peripheral surfaces of said fixed internal gear (25) and said rotary internal gears (26) are provided with grooves (103) each of which has one end (103a) opened at an edge at the side of said space (G) formed between said fixed internal gear (25) and said rotary internal gears (26) and is inclined such that said one end (103a) of said groove (103) is disposed at a downstream side of a direction of rotation of said rotary seal members (101, 102) with respect to the other end (103b) of said groove (103).

Claim 20

A transmission apparatus according to claim 16, characterized in that said grooves (103) are formed in said inner peripheral faces of said rotary seal members (101, 102).

Claim 21

A transmission apparatus comprising a main body, a fixed internal gear fixed to said main body, a rotary internal gear provided coaxial with and adjacent to said fixed internal gear and planetary gears engaging said fixed internal gear and said rotary internal gear, characterized in that said rotary internal gear (26) and said fixed internal gear (25) have different number of teeth, and said rotary internal gear (26) is supported so as to rotate around a central axis thereof which is coaxial with a central axis of said fixed internal gear (25); that a carrier (41) for holding said planetary gears (40) so as to rotate around said central axis of said fixed internal gear (25) and their own axes is supported so as to rotate around a central axis thereof which is coaxial with said axes of said fixed internal gear (25) and said rotary internal gear (26); that a space (G) continuous in a circumferential direction is formed between facing end faces of said fixed internal gear (25) and said rotary internal gear (26); that flange-like members (65) for transmitting rotation of said carrier (41) are provided so as to extend radially outwardly from an outer peripheral surface of said carrier (41) to outside of said fixed internal gear (25) and said rotary internal gear (26) through said space(G); and that rotary seal members (101, 102) surround said fixed internal gear (25) and said rotary internal gear (26) and rotate around central axes thereof coaxial with central axes of said fixed internal gear (25) and said rotary internal gear (26).

Claim 22

A transmission apparatus comprising a main body, a fixed internal gear fixed to said main body, a rotary internal gear provided coaxial with and adjacent to said fixed internal gear and planetary gears engaging said fixed internal gear and said rotary internal gear, characterized in that said rotary internal gear (26) and said fixed internal gear (25) have different number of teeth, and said rotary internal gear (26) is supported so as to rotate around a central axis thereof which is coaxial with a central axis of said fixed internal gear (25); that a carrier (41) for holding said planetary gears (40) so as to rotate around said central axis of said fixed internal gear (25) and their own axes is supported so as to rotate around a central axis thereof which is coaxial with said axes of said fixed internal gear (25) and said rotary internal gear (26); that a space (G) continuous in a circumferential direction is formed between facing end faces of said fixed internal gear (25) and said rotary internal gear (26); that flange-like members (65) for transmitting rotation of said carrier (41) are provided so as to extend radially outwardly from an outer peripheral surface of said carrier (41) to outside of said fixed internal gear (25) and said rotary internal gear (26) through said space(G); and that rotary seal members (101, 102) surround said fixed internal gear (25) and said rotary internal gear (26) and rotate around central axes thereof coaxial with central axes of said fixed internal gear (25) and said rotary internal gear (26).

Claim 23

A transmission apparatus according to claim 18, characterized in that inner peripheral faces of said rotary seal members (101, 102) face outer peripheral surfaces of said fixed internal gear (25) and said rotary internal gear (26) at a slight spacing so as not to contact each other, said inner peripheral faces of said rotary seal members (101, 102) and/or said outer peripheral surfaces of said fixed internal gear (25) and said rotary internal gears (26) are provided with grooves (103) each of which has one end (103a) opened at an edge at the side of said space (G) formed between said fixed internal gear (25) and said rotary internal gears (26) and is inclined such that said one end (103a) of said groove (103) is disposed at a downstream side of a direction of rotation of said rotary seal members (101, 102) with respect to the other end (103b) of said groove (103).

Claim 24

A transmission apparatus according to claim 18, characterized in that said grooves (103) are formed in said inner peripheral faces of said rotary seal members (101, 102).