GB817276A - Pneumatic gear-shift device for change-speed gears - Google Patents
Pneumatic gear-shift device for change-speed gearsInfo
- Publication number
- GB817276A GB817276A GB2609055A GB2609055A GB817276A GB 817276 A GB817276 A GB 817276A GB 2609055 A GB2609055 A GB 2609055A GB 2609055 A GB2609055 A GB 2609055A GB 817276 A GB817276 A GB 817276A
- Authority
- GB
- United Kingdom
- Prior art keywords
- clutch
- bore
- brake
- engagement
- pressure
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/12—Mechanical drives with means for varying the speed ratio
- B23Q5/14—Mechanical drives with means for varying the speed ratio step-by-step
- B23Q5/145—Mechanical drives with means for varying the speed ratio step-by-step fluid-operated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
- F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
- F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
- F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
- F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
817,276. Gearing for stopping and starting machinery; clutches; change-speed gear. MOOSMANN, A. Sept. 12, 1955 [Sept. 13, 1954], No. 26090/55. Class 80 (2). In a pneumatic gearshift for a change-speed gear, a diaphragm or equivalent is interposed between the air supplies for a pneumatic friction clutch and a pneumatic friction brake to prevent engagement of one before disengagement of the other. A gear 1 transmits the drive through a friction clutch 2, engaged against pressure of a spring 21 by a pneumatic cylinder and piston 3, to a gear 4 on a shaft 6. The shaft 6 carries a second gear 7 and a pneumatically engaged friction brake 16. The gears 4, 7 engage gears 5, 8 clutchable by sliding dog sleeve 10 to an output shaft 9. The sleeve 10 is moved axially by a shift rod 11 and pneumatic piston 12 to selectively engage either gear. Air for the operation of the clutch 2, brake 16 and piston 12 is admitted through connections 23, 18, and 14, 15, respectively. The change-speed gear is controlled from a programme controller of the type described in Specification 813,381, [Group XXII]. For engagement of clutch 2 air from the controller passes to connection 24 in the shift device, Fig. 2, through a change-over device 25 and bore 26 to a diaphragm chamber 28, thence to a restrictor nozzle 30 and non-return valve 31, closed for the passage of air in that direction, to a bore 35 connected with connection 23. The bore 35 is also in communication with the diaphragm chamber of an impulse-valve 39 which provides a completion of engagement signal to the controller. Engagement of the brake is provided. by air pressure to bore 41 and venting of connection 24. Pressure frombore 41 passes to a restrictor nozzle 43 and non- return valve 44 and thence to bore 45 which is closed by the diaphragm 27 until the pressure in the clutch system has bled away to release pressure in chamber 26. When the bore 45 is opened pressure flows through diaphragm chamber 46 to bore 47 and thence to brake connection 18. An impulse valve 53 signals completion of the brake engagement, and the driven machine can either remain braked or a change of speed be initiated by the programme controller. Combination of the strength of the clutch and brake disengaging spring with the strength of the springs in the non-return valves provides a rapid drop in pressure for the first phase and a slow drop, with continued holding by the diaphragm 27, for the fmal phase of clutch and brake release, and prevents engagement of clutch and brake simultaneously. To prevent the transmission of high torques at low speeds the controller may direct air pressure for clutch engagement to connection 54 under such conditions, from this connection the air passes through a reducing valve 55 to passage 62 and the change-over device 25 then closes bore 24 and passes air to bore 26 for the clutch engagement to function normally at reduced pressure, and thus limit the torque transmitted by the clutch 2.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM24484A DE1108036B (en) | 1954-09-13 | 1954-09-13 | Multi-stage gear change transmission, especially for machine tools |
Publications (1)
Publication Number | Publication Date |
---|---|
GB817276A true GB817276A (en) | 1959-07-29 |
Family
ID=7299309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2609055A Expired GB817276A (en) | 1954-09-13 | 1955-09-12 | Pneumatic gear-shift device for change-speed gears |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH335278A (en) |
DE (1) | DE1108036B (en) |
GB (1) | GB817276A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017207666A1 (en) * | 2017-05-08 | 2018-11-08 | Zf Friedrichshafen Ag | Clutch assembly and vehicle transmission |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE675501C (en) * | 1934-09-10 | 1939-05-17 | Bendix Westinghouse Automotive | Pressure medium switching device for gear change transmissions, especially of motor vehicles |
DE759770C (en) * | 1937-10-28 | 1952-12-01 | Bendix Westinghouse Automotive | Pressure fluid operated control device for vehicles |
DE762584C (en) * | 1943-06-24 | 1953-01-26 | Erich Herion | Four-way valve controlled by an auxiliary valve |
BE480191A (en) * | 1947-02-19 | Gaston Matheys |
-
1954
- 1954-09-13 DE DEM24484A patent/DE1108036B/en active Pending
-
1955
- 1955-09-08 CH CH335278D patent/CH335278A/en unknown
- 1955-09-12 GB GB2609055A patent/GB817276A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1108036B (en) | 1961-05-31 |
CH335278A (en) | 1958-12-31 |
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