DE1550692A1 - Fluid transmission - Google Patents

Description

PATENTANWÄLTE I Ö O U D J t

DH. ing. H. NEGENDANK · dipl, -ing.H. HAUCK Dipl.-Phys. W. SCHMITZ

HAMBURG-MUNICH HAMBURG 36 -NElTER WALI. 41

TBL. ae 74 28 AND SO 41 15

BORGr-WARlNlEE CORPORATION teibgr. neoedafaiint sahbcsg

200 South Michigan Avenue, Munich ib mozartstr. 23

QHIOA & O. Illinois 60604 (USA) ^ΙΙΙ · " ^ΙΜΜ

TBLXGR. NEGEDAFATBNT MONKS

Hamburg, December 10, 1966 Fluid transmission

The invention "relates to a fluid drink, in particular to a fluid transmission for use in an automatic washing machine, although it is also used in other machines is possible.

The object of the invention is to create a transmission for the drum and movement device drive of an automatic washing machine, consisting of a pump »die can be operated in two rotations. The liquid transmission includes a combination with a control system »one Pump that delivers pressure to a hydraulic motor in one direction rapid rotation of the washing machine drum and, in the reverse direction of brewing, pressure on another motor to operate the moving device of the washing machine.

Another object of the invention is to provide a fluid transmission for an automatic washing machine which is a hydraulic pressure circuit for a centrifugal operation and another circuit for movement operation is provided '", with control valves as they are normally used for switching

909830/0786

are used by the centrifugal circuit in the movement circuit, are switched off because of the operation of the pump either in one or the other direction of rotation, one or the other the other circuit is supplied.

Further properties and advantages of the invention emerge from the description in conjunction with the drawings, il point

1 shows a schematic representation of a fluid transmission for a washing machine during the

Movement rate}

Fig. 2 is a schematic representation of the transmission during the spin cycle

Fig. 3 is a schematic representation of the transmission during the sole udder brake stroke

Figure 4 is a section through the control system and variable volume pump for the transmission;

Fig. 5 is a section close to the line 5-5 of FIG

ο Representation of the cam gear for the control

oo einriohtungi

^ Fig. 6 is a section close to the line 6-6 of Fig. 1,

Fig. 7 is a top plan view of the variable displacement pump Volume partly in section,

FIG. 8 shows a section along the line 8-8 in FIG. 7,

9 shows a section along the line 9-9 of FIGS. 7 and

FIG. 10 shows a modified form of that shown in FIG Motion motor.

Fig. 1 shows a fluid transmission 10 for driving the Drum 11 or the moving device 12 of an automatic Washing machine. A motor 13 is provided which has a pump H for circulating water in the drum of the automatic washing machine drives, and to operate the motor 13, a power source 15 is shown. It is a cycle selector switch shown schematically in a simplified form, although in a car wash this function of a timer is better known Execution would be taken over.

The most important elements of the fluid transmission are » A reversible variable volume pump 20, a control valve 21 for the pump 20, a mover drive motor 22, a clutch 23 for actuating the movement device drive, a sole rudder motor 24, a

to locking device 25 for the drum 11 as well as a

co spin brake valve 26.
ο

^ A lid 30 is provided for the drum of the washing machine,

which includes a safety switch 31 which has an interrupt the power supply to the motor 13 causes when the lid

is raised.

A fluid pan 32 is provided, which for the sake of simplicity at various locations in the schematic representation is shown, although in the actual embodiment a single fluid pan is present in which all the discharge connections for the various elements of the transmission are under pressure Dispense fluid. The electrical lines 33 and 33 connect the power source 15 to the motor 13. The line is a ground line. The line 35 connects the power source 15 to the switch 16. The switch 16 is through a line 36 connected to the engine. A line 37 connects the safety switch 31 to the switch 16. A line connects the safety switch 31 to the motor 13.

To connect the pump 20, the control device 21, the centrifugal motor 24 and the centrifugal brake valve 26 is a Fluid line 40 is provided. A fluid line 41 forms a connection to the pump 20, the Control device 21, the mover drive motor 22, the locking device 25 and the coupling 23. A fluid line 42 connects the centrifugal motor

_o > with the anti-skid valve 26.
co

° The line 41 is connected to the ^ ₃ fluid pan 32 by a check valve 45, which has a flow

* n medium flow only in the direction from the tub into the line 41 allowed. The line 40 is connected to the fluid pan 32 by a check valve, which has a

Fluid flow only in the direction from tub 52 in the line 40 is allowed in. The pump 20 is also on

the fluid pan 52 connected, through a Line 47. The locking device 25 is through a . Line 48 connected to the fluid pan 52, and the Spin brake valve 26 is connected to fluid pan 52 by lines 49 and 50.

In the pig. 4, 7, 8 and 9 the pump 20 is more detailed The illustration in Fig. 1 shows schematically the fluid channels within the pump, while Fig. 7, and Fig. 9 shows the actual design of the pump. The pump 20 has a cam ring 55 which slides in a pump housing 56 is arranged. A spring 57 pushes the sliding one

lock ring 55 to the left in Fig. 1, and the controller 21 pushes the sliding cam ring 55 to the right, the The spring pushes the cam ring into a position in which the pump controls the

has the slightest displacement.

The pump also has a rotor 58 with a plurality of blades 59 slidably disposed in slots 59a of the rotor. The outer ends of the blades 59 capture an inner surface 60

co of the cam ring 55. The rotor is also driven by a shaft 61 ο

<o connected by the electric motor 15 of the gearbox oo

Q is driven.

oo Immediately above the motor and the cam ring of the pump

there is an orifice plate 62, the large rectangular one

Has cavities 65 and 64. Above the orifice plate 62 is BAD ORIGINAL

15506Ü2

- ^l i as shown in ig "9 - a G-67 disposed ehäusekörper formed in the fluid channels are ,, with the cavity, a channel 68 is connected. A channel 69 connects to the cavity 64. As shown in FIG. 4, the channel 69 is connected to the fluid line 41 and the channel 68 is connected to the fluid line 40

In the area of the orifice plate 62 between the cavities 64 and 64, an elongated recess 71 is formed which extends extends parallel to the cavities 63 and 64. A recess 72 is located transversely or at right angles to the recess 61 formed which intersects the recess 71. The recess 72 is through a channel 73 with the cavity 63 and through a channel 74 is connected to the cavity 64. A ball 75 is arranged within the recess 72, which is used to shut off either channel 73 or channel 74 can be engaged. With the recess 71 are vertical channels and 77 connected. The channels 76 and 77 terminate in elongated openings 78 and 79.

In the bottom of the cavity 63, a large arcuate opening 82 and a small arcuate opening 83 are formed.

J ₀ In the bottom of the cavity 64 are a large arcuate shape

to opening 84 and a small arcuate opening 85 is formed.

*** The large arcuate openings 82 and 84 are those ^ Openings through which fluid is drawn into the pump 20 and it is pushed out of it 'One forms a pressure or discharge opening, and the other forms that Suction opening, depending on the direction of rotation of the pump rotor. the

BATH ORIGINAL

■ Arcuate openings 78, 79, 83 and 95 lead pressure approaches the rear of the blades 59 to make them radially outwardly into contact with the inner surface 60 during operation of the pump to hold on and make sure the ones on the shovels acting force is balanced and the blades remain in contact with the inner surface. The recesses 72 and 71 » which cooperate with the ball 75 are designed so that only the pressure side of the pump or the side of which pressurized fluid is supplied to the system, and the slots under the openings 78 and 79 below Apply high pressure fluid to the blades to compensate for them while on the corset pressure side of the pump only inlet pressure on the blades comes into play to create a balance. The described pump 20 pumps fluid in both directions of rotation and thereby brings pressurized fluid to either line 4-0 or line 41. The movement of the sliding cam ring 55 to the right against the force of spring 57 increases the displacement of the pump by increasing the Eccentricity of the rotor with respect to the lock ring.

Bs is now on Figo 1, 7. " 8 and 9, fig ο 7

shows that when operating the pump counterclockwise to

° by the electric motor of the cavity 64, the pressure relief recess ^ for the pump that delivers the pressurized fluid ^ to the Xanal 69 and thus sjur fluid line

-J Jenn countered the pump as shown in Pig »7

^m rotates clockwise, the volume of the spaces between the blades 59 ″ decreases in the area of the pump immediately below the opening 84 as the rotor rotates, and the fluid BAD ORIGINAL

is in and out of cavity 64 through opening 84 the basket 69 pushed out. In the area of the pump under the cavity 63, the volume of the space between the Blades 59 "close when the rotor rotates, so that a negative pressure is created and fluid flows through the channel 68, the line 40, the check valve 46 is drawn from the tub 32 into the pump. As I said, that changes Operation of the control device 21 the displacement of the pump and moves the sliding ITockenring 55 against the force of the Seder 57.

The pump has an improved pressure equalization system used to hold the blades against the inner surface 60 during rotor rotation. The openings 78, 79, and 85 are the pressure equalization openings. Assuming the pump is rotating counterclockwise, it flows Fluid from cavity -64 through channel 74 into recess 72 and recess 71. Ball 75 is thereby printed to the left in Fig. 9 and blocks the channel 73 and closes high pressure fluid in the Recess 71.

The high pressure fluid in the co

ο recess 71 then flows through the vertical channels 76 and co

77 into the arcuate recesses 78 and 79, making it ^ on the inner end of the blades 59 in the area of the

• <i arcuate openings 78 and 79 come into play. Of the

The high pressure in the cavity 64 also flows through the Opening 85 to the inside of the blades 59 in the area of the cavity 64ο This is how the inner Jinden of the blades opens

BATH ORIGINAL

a high pressure is applied to the high pressure side of the pump to force it against the inner surface 60 and to equalize the pressure of the blades 59 as a result of the equalizing pressure applied to their inner ends.

It can be seen that when the pump is operated in a clockwise direction, ball 75 blocks channel 74, the area of the pump pressurized under cavity 63 and again fluid pressure from recess 71 as well as the channels 76 and 77 is brought up to the blades for pressure equalization, while these are in the area between the cavities 63 and 64 move. Therefore, when the pump is operated in a clockwise direction, due to the action of the ball 75 and the with Her connected fluid channels, the blades on the pressure side of the pump are balanced again and are in a Cooperation with the inner surface pressed. In this way, no springs or other devices are necessary to to keep the blades engaged with the inner surface 60.

1 and 4 show the control valve 21 for the pump 20 with two control elements 90 and 91. The control element 91 is by a crouch 92 and the control element 91 by a Cam 93 adjustable = there is an extension 94 of the pump

a> housing 56 is provided which has two stepped bores 95 ο

"* includes to accommodate controls 90 and 91" The co

_o bores 95 have a first portion 96, a second o ■ section 97 of smaller diameter and a third

Section 98 of smaller diameter than that of the section in

97.

The control elements c & and 90 each include a pin 101

a guide 102 arranged thereon, which is prevented from sliding off the pin by a snap ring 103 will. The guides 102 engage in the bore sections.

A piston 104 is also slidable in the bore section 96 arranged. A bore 106 in the piston 104 receives a transverse pin 105 mounted therein. The i ^ uerstift 105 is coming in a slot 107 in the pin 101 for engagement, whereby the piston 104 and the pin 101 by a slip connection from the slot 107 and the pin 105 connected to each other are. A spring 108 is inserted so that it comes to cooperate with the piston 104 and the guide 102.

A piston 110 with a bore 111 is arranged in the bore section 97. In the bore 111 there is a Cross pin 112 ″ The cross pin 112 engages in a slot which is in an extension 114 of the piston 104 is formed. So the piston 110 and the piston 104 are through a slip connection of a pin 112 and a slot

g connected to each other. The piston 110 has an extension length 115, which is connected to it and slides in the bore portion 9ö. The reference numbers for illustration in Fig. 4 are in

^ For the sake of clarity listed on control 91 only,

co although the same reference numbers are also on the control

o would exist for the same parts as the controls

and 91 are identical in design

To rotate the cams 92 or 93, manual adjustment means or levers 116 and 117 are provided. Levers 116 and 117 are in

BATH ORIGINAL

an end plate 118 supported on the extension 94 is fastened by bolts.

Fig. 5 shows a semicircular section 119 »of the End plate 118 may include, and on the information for the Operating speed can be read, which is selected by the hand lever 116 or 117 and the operation of the .Nocken 92 or 93 became.

The operation of the controls 90 and 91 can be described in terms of the operation of any one of them as they are identical in terms of operation, although only one is effective in each operating cycle is rotated clockwise, then fluid pressure is supplied to the line 40 and thus through the channel 40 embedded in the area between piston 104 and 110 of control element 90. The fluid pressure thus acts in this way on the piston that he can do so because of the slip connections spreads apart and into the one in Fig. 4 for the control

brings the position shown, in which the cross pin 112 the right end of the slot 113 detected. The pin 105 engages the right end of the slot 107 due to the action of the spring 108.

«Ο Depending on the setting of cam 92, the ο

to the effective length of the control element 90 set »The on the oo

^ Pistons 104 and 110 acting fluid pressure moves the

o Extension 115 of the valve piston 110 against the spring 57 to a certain extent to the right and thereby moves the cam ring 55 into a predefined displacement setting for the pump 20 ₀ Pa, the movement of the pump ring 55

20 to the right the displacement of thePuflPe increases when the cam be moved into an increased position corresponding to Mg «5, the operating speed of the fluid motor actuated in the transmission increases ο

If for some reason the pump is out of fluid pressure

that develops that exceeds that / according to the design of the

Cam 92, the strength of the springs 108, as well as that in the Training specified effective range of difference between the pistons 104 and 110 is given, then the piston 104 move against the force of the spring 108 to the left and thereby move the pin 105 to the left side of the slot 107 and it allow the spring 57 to move the cam ring 55 and the extension 115 to the left as the pressure increases to the Reduce the displacement of the pump and thereby control the flow of fluid from the pump until it is the predetermined Maximum value reached.

When the pump operates clockwise, the fluid line will 40 is pressurized and actuates the centrifugal motor 24. Therefore, the control element 90 acts as a control valve designed for the centrifugal cycle in order to supply a certain predetermined amount of fluid and one of the pump

^ leading fluid flow during the spin cycle in

O ₀ depending on the value generated by the lever 116 and the cam 92

ο set the manually selected speed.

_m When the pump works counterclockwise, then is brought pressurized fluid to the line 4T, to actuate the movement motor 22 so as to vibrate the moving device 12th That's how it is

BATH

Control device 91 deraxt during the movement cycle effective in controlling the speed of movement and the establishment of a particular predetermined fluid flow during the movement cycle, which is allowed by the setting of the manual operating device 117 and the lure 93 is dependent.

Since a greater torque and therefore higher fluid pressures are generally required to operate the movement device than to operate the drum during the centrifugal cycle, the spring 108 and the control element 91 as well as the difference area therein are designed in such a way that a greater maximum flow is permitted than with the spring 108 and the difference area of the control element 9O ₀

The control device 21 thus includes two control elements, the combined pressure regulator and pump displacement control elements which allow a predetermined combined development of flow and pressure and also in are adjustable in a novel way to provide the correct flow rate for the chosen cycle »It is thus One control element each for the spin cycle and one for the movement cycle Washing machine has been created so that in every cycle the

to the correct pressure and flow combination can be used * ο

OO -

_o In Figs. 1 and 6, the motion motor 22 is shown. Of the

ο motion motor has a housing 120 with a control valve

α »121 and a chamber 122. In the chamber 122 is a shovel 123 arranged, the introduction of fluid pressure in the opposite ends of the chamber 122 a back and forth

ORIGINAL BATHROOM -15-

The blade 123 is integrally formed with a itfabenabschnitt 123a provided and to circulate around as well mounted on a vertical axis which extends in the center of a hollow shaft 124 which is used for driving with the drum 11 is connected.

The control valve 121 includes a slide 126 with lands 127, 128 and 129. The webs 127 and 128 are through a Recess 130 and the webs 128 and 129 by a ^ .usdrehung 131 separated. The area of the G-housing 120 around the valve around it includes openings 135, 136, 137, 138, 139, HO and a. Fluid lines 145 and 146 are connected to the openings 136, HO. Lines H5, H6 are output lines connected to Manne 32. the Fluid line 41 is connected to control valve 121 through opening 138.

The blade hub portion 123a has at its upper end an hanging groove 147 and is provided in its bottom with a recess 148 which extends from the central part of the blade hub portion 123a radially extended. On the lower

On the side of the hub portion 123a, an annular groove H7a is connected to the groove 147 through a channel 147b. The hat is H7 a pressure compensation groove, which is formed so that the forces acting on the iiabenabschnitt 123a by

ο developed the fluid pressure present in the fury H7 o be compensated.

Immediately below the fluid chamber 122 are partially Arcuate fluid ports 149 and 150 are arranged.

- 16-BATH

A fluid channel 151 extends from the tubes 147 perpendicular to the underside of the hub portion 123a> um temporarily in fluid communication with ports 149 or 150 to stand ο

A fluid channel 155 connects opening 135 of the

Control valve 121 with the opening 149 of the movement motor 22. In a similar manner, a line 156 connects the port 141 of the control valve 121 to the port 150 of the movement "-" otor 22. A fluid channel 157 connects the port 37 of the control valve 121 to the left side of the fluid chimney 122 (Fig. 1). In the same way, the fluid channel 158 connects the opening 139 to the control valve 121 on the right side of the fluid chamber 122 (Pig. 1) A fluid channel 159 connects the opening 138 of the Control valve 121 with the annular groove 147 of the blade 123.

To establish a drive connection between the shovel

123 and a shaft 160 which is for driving with the motion
Device 12 is connected / the coupling 23 is provided. The coupling 23 includes an extension 164 of the housing 120. Extension 164 is attached to housing 120 and has bores 165 and 166. Bore 166 is through

_o an opening 167 connected to the fluid channel 41.

co The bore 165 is through a discharge opening 168 with the tub to

° 32 connected. "On the shaft 160 is a drive device

-J attached, on which drive lugs 171 and 172 are formed.

A piston 173 is slidably inserted in the bore 166 and cooperates with a dog clutch body 174. Of the BATH

4G

Claw body 174 is provided with slots 176 and 177. the Lugs 171 and 172 on the drive device engage slots 176 and 177. With the .Kupplungskörper 174 and the ~ Drive device 170 is a Fafer 178 in cooperation, which presses the coupling body 174 and thereby the piston 173 'as shown in FIG. 1 downwards. The coupling body 174 has teeth 179, the corresponding to the drive

Recesses 180 engage which in the hub portion 123a the blade 123 are provided. The recesses 180 are in a drive connection with the coupling body 174 when under Pressurized fluid is admitted from line 41 into bore 166. At this point it is moving the piston 173 upwards against the force of the spring 178 brings the coupling body 174 into engagement with the recesses 180 in the blade hub portion 123a and therefore forms a drive connection between the blade 123 and the shaft 160, which is connected so that it drives the movement device 12 during the movement cycle. During the spin cycle the clutch is disengaged, so that the movement device move in freewheeling mode and the movement of the Drum can follow.

The operation of the motion motor is as follows: vtfenn the pump

ο 20 is operated in the direction that it is under pressure

co promotes standing fluid to line 41, then co

° fluid under pressure through port 167 ^, the clutch 23 let in to operate the clutch 23

tn and a drive connection between the blade 123 as well of the shaft 160 for driving the movement device 12. Fluid pressure is also passed through the orifice

BATH

138, the recess 131, the opening 139 and the fluid channel 158 into the right side of the fluid chamber

122 let in when the valve 121 is in the first Axial position as shown in l'ig. 1 is located. The fluid pressure acting on the vane 123 thus moves the vane 123 in the direction of the arrow or clockwise. The paddle 123 continues to move clockwise until it reaches an end position when the vertical channel 151 passes over the opening 149, causing pressurized fluid to pass through the Port 149, the channel 155 to port 135 of the control valve can flow. In the same way, the opening 135 is through

the fluid line 156, the opening 150 and the Recesses 148 connected to the tub 32.

The fluid pressure in port 135 acts on the Web 127 of the control valve for moving the slide 126 to the right in Fig. 1. When the slide 126 to the right in A second axial position is moved, then the channel 158 and the fluid chamber 122 on the right side of the Movement motor 22 with the opening 139, the recess 131, the opening 140 and the line 146 with the \ / anne 32 connected. Thus, the pressurized fluid is withdrawn from the right side of the fluid chamber 122 when the slide 126 is in the right position.

The pressurized fluid in port 138 now flows through the channel 157 to the left side of the fluid chamber 122 and acts on the blade 123 in the

Counterclockwise direction, the BAD ORIGINAL ^{6 &} - ^& .

9 09830/0785

Shovel continues moving in this sense until aie Reached the end position in which the channel 151 moves over the opening 150 and the recess 148 over the Opening 149 is when the bucket is in ± clockwise position has moved via the opening 149 in order to actuate the control valve 121 and the direction of movement of the blade 123 to reverse, then the recess 148 connects on the Underside of the blade 123, the opening 150, the line 156 and the opening 141 and the right side of the control valve 121 via the coupling device 23 and the opening 168 with of the pan 32 and thereby withdraws pressurized fluid from the right side of the valve 126, so that the Slide 126 can move to the right. The shovel 123

continues its oscillating movement between its extreme positions, which are determined by the length of the arcuate openings 149 and 150 and the arrangement of the perpendicular channel 151 can be determined.

In lig. 10 is a modified form of the motion motor 22 shown in which there is a variable stroke of the movement device. V / ie in the Pig. 10 is shown the motion motor 22 is provided with an additional manually operated control valve 235, and the housing part 122 is provided with additional arcuate openings 136 and 137

<° provided. The manually operated valve 235 has an ο

^ Valve slide 240 with webs 241 and 242, and it closes ο openings 243, 244 and 245. The opening 243 is through ο a fluid line 250 with the fluid line

«N 155, opening 244 through line 251 with the additional

arcuate opening 136 and the opening 245 of the by hand

BAD OHlGlNAL

"actuating valve through the fluid line 252 with the additional arcuate opening 137 connected.

The control valve 121 can also be fitted with a ball locking device 255 should be provided in order to provide a precise adjustment of the control valve 121 in its "two axial positions.

! ig. 1 (5 shows a motion motor that changes a - ^ n

di.x hub for the movement device of the machine / through the blade 123 of the motion motor is formed as a result of the use of the additional arcuate openings 136 and 137 will.

The manually operated valve 235 can be adjusted be that pressurized fluid in line 250 cannot flow into either line 251 or 252. In

in such a case, the opening 149 brings about the reversal

of the movement motor, and the movement motor works with an end position of the shovel 123 above the opening 149

The slide 240 of the manually operated valve 235 can also be moved into a position in which the fluid channels 250 and 251 are connected to each other. In such a! All the movement device moves at one

o clockwise movement to a position different from that in the co

oo! ig. 1 shown in an end position in which the flow co

° central channel 151 moved over the arcuate opening 136.

«^ At this point there is a pressurized flow egg means to the fluid channel 151, the opening 136, the

Fluid line 251 and fluid line 250 BATH ORIGINAL

brought up to the slide 126 of the control valve 121 move to the right thereby admitting pressurized fluid into the fluid channel 157, invert the paddle 123 and move it counterclockwise. The ülndstellung of the blades 123 is thus above the arcuate opening 136.

The manually operated valve 235 can also be moved to a position in which it is the fluid lines 250 and 252 connects to each other. In such a case, the paddle will move clockwise as it moves from the position shown in Fig. 1 to the position above the opening 157 "in which the pressurized Fluid in the fluid channel 151 to port 137, line 252, valve 235, line 250 to operate the control valve 121. The setting the blades 123 is thus above the opening 137.

The extent of the arcuate opening 150 is in this case Modification enlarged to provide a discharge for the pressurized fluid through recess 148,

if one of the additional arcuate openings 136 or is put into operation by the manually operated valve 235.

to the execution according to the ITig. 10 sees a means of attaining co

ο a variable stroke for the movement device of a © Washer or for the paddle of a fluid paddle motor by having two arcuate openings that can be operated by the use of a hand-operated

BATH ORIGINAL

Valve can be operated optionally. When used in In a washing machine, the stroke of the movement device can thus be changed in order to accommodate the different types of in the Machine to adapt the laundry to be washed.

The centrifugal motor 24 of the liquid transmission includes a outer rotor 185 and an inner rotor 186 (Mg. 1). Of the outer rotor has recesses 187 which serve to receive teeth 188 formed on inner rotor 186. That under Pressurized fluid is admitted through line 4-0 as shown at 189 during the spin cycle and becomes in the fluid chambers between the teeth 188 of the inner rotor and the recesses 187 of the outer rotor effective, to spin the inner and outer rotors when the pressurized fluid is received to move. Line 42 is the fluid delivery

connection for the centrifugal motor, which at 190 to the centrifugal motor 24 is connected ο

The inner rotor 188 is for driving with the hollow shaft 124 connected, dis forms part of the drum 11 and, if the inner rotor 186 rotates the drum at a rate dependent on the flow rate of the fluid line 40 admitted fluid is rotated. to

The fluid pressure operated lock 25 is a oo

^ Locking device which holds during the movement cycle, the drum 11 _o with respect to an orbital motion. When the oo v / ash pieces by the movement device 12 in the movement cycle

are moved, then the drum 11 has the tendency to move BAD OnivjlNHU

/, It

to follow the moving device 12, and if the drum were not held against orbiting movement, then the stirring or washing effect would not be achieved.

The fluid pressure actuated locking device includes a housing portion 195 with a bore 196. A piston 197 with a tappet 198 is slidably inserted into the bore 196, on which a tapered end section is located 199 located. A bore 200 allows pressurized fluid from the line 41 into the bore 196 » A spring 201 is arranged in the bore 196, which acts on the piston 197 and presses it to the left.

During the movement cycle, if required, To hold the drum in place, fluid pressure from the line 41 let into the bore 196 through the opening 200, whereby the piston 196 and the tappet 198 to the right in FIG. 1 are moved, against the force of the spring 2u1, A series of recesses 202 is provided on the outer circumference of the outer rotor 185. These recesses 202 have a shape corresponding to the shape of the end section 199 »So finally, when the outer rotor 185 begins, the Movement of the movement device 12 to follow the pressurized fluid acting on the piston 197

to the plunger 198 to engage in one of the recesses 202 ο

<o and locks the outer rotor 185 against a rotational movement. oo

Q Therefore, the outer rotor 185 is in the drive circuit binding with the inner rotor 186, and the inner rotor 186

oo is connected to the drum 11 for driving purposes. The action of the plunger 198 in the form of holding the outer rotor in place opposite to an orbital movement has the effect of holding on

BATH ORIGINAL

of the drum 11 with respect to a rotational movement.

Therefore, it is removed from the drum 11 in a convenient place a fluid pressure actuated lock of simple design is provided which engages the drum in dependence on actuation of the pressurized fluid circuit for movement.

The sling "brake valve 26 closes a valve housing 2i ^ with openings 211, 212, 213 and 214 a. The opening 211 is in communication with the fluid line 42, the opening 212 with the fluid line 40, the opening 213 with the. Fluid line 49 and the opening 214 with the Fluid line 50. Lines 49 and 50 run. to tub 32. The valve housing 210 has a bore 220 with a valve slide 221 slidably disposed therein.

In the bore 220 is in cooperation with the slide 221 a spring 222 is arranged, which pushed the slide 221 to the left in Fig. 1. The slide 222 has a large recess 224 and small recesses 225, 226. A hollow section 228 is also provided in the slide, furthermore

there are openings 229 and 230 in the slide 230 connects recess 226 and opening 229, recess 225 with hollow portion 228. Opening 229 is σ

**> relatively small and acts as a throttle opening. oo

ο The operation of the spin brake valve 26 is as follows: If the fluid pump 20 is pressurized fluid during the spin cycle su the fluid

BATH & mm ~

line 40 and thereby to the centrifugal motor 24 promotes, then pressurized fluid is also admitted through the opening of the centrifugal brake valve 26 and comes to the: Slide 221 to act against the force of spring 222 to the right in the position shown in FIG move. In this position the large turning connects the openings-211 and 213 · That from the centrifugal motor 24 and the line 42 exiting pressurized fluid can unthrottled through the centrifugal brake valve 26 and the

Line 49 to the tub / st-flow.

If the spin cycle is set by the normal cycle timer 16 is interrupted, namely when the lid 30 is lifted

and the switch 31 interrupts, thereby de-energizing the motor and Brings the pump 20 to a standstill, then no more pressurized fluid is passed through the orifice 212 embedded in the anti-spin valve. The spring does so

a shift of the slide 221 of the anti-skid valve to the left into the position shown in FIGS. In the The position of the spin brake valve piston shown in FIG. 3 are the openings 211 and 213 of the spin brake valve again connected to each other, but the fluid now flows from the opening 211 through the opening 230 of the slide 221 into the

to hollow section 228 and then through the throttle duct or the σ

to opening 229 to the line 49 leading to the tub. In oo

* f in this case the flow Q discharged from the centrifugal motor 24 medium throttled on its flow to the Yfanne »

A pressure build-up takes place in the fluid line 42; since the drum 11 still has the tendency to -a-spin-

BATH

ZS

"**" 15506S2

To execute movement, it now drives the inner rotor 186 of the centrifugal motor 24, and the centrifugal motor 24 works as

a pump for pumping the fluid into line 42 into it. Since the line 42 now has a throttled outlet * the pressure builds up and serves to control the relative rotary movement Bring to a standstill between the pump elements and thus act as a hydraulic brake for the drum 11 works.

The centrifugal brake valve 26 therefore represents an advantageous embodiment that the centrifugal motor of the transmission as Brake used to quickly bring the drum of a washing machine to a standstill.

Stopping the drum quickly is an important one Factor in an automatic washing machine because the drum must be brought to a standstill before the cycle of movement can begin, and the time required to stop the drum comes directly in the cycle time of the automatic

V / ash machine to express. Furthermore, the forms fast Stopping the drum is a safety feature to prevent accidents

prevent that can occur when using the Hand machine an operator into the drum

grabs while it is moving »The anti-skid valve co

° is simply designed and works automatically in dependence to

ω from the fluid pressure condition in line 40. σ

O ₀ - The operation of the fluid transmission according to the invention is tn _

summarized as follows: The timer or selector switch 16

the automatic washing machine, which is shown schematically by the BADORtOlHAL

Switch 16 is shown selects either the wash or spin cycle for the transmission. The one for the measure in question The speed of the motor coming into i'rage is set by hand controlled by means of the lever 116 or 177 to the effective length of the control elements 90 or 91 and thus the To change the position of the I-cam ring 55 of the pump 20.

When the movement rate has been selected, the pump 20 delivers pressurized fluid to the line 41. The The pressure and the flow developed by the pump 2ü and thus the speed of the movement motor 22 are from depending on the setting of the control element 91 for the movement cycle by the lever 117, as shown in FIG. The pressurized fluid in the line 41 is used to actuate the lock 25 to the drum 11 to hold fast in the manner described. KS presses as well the coupling 23 to connect the movement device and the movement motor 22 to each other for driving. The one from the Line 31 and the opening 138 in the motion motor admitted fluid pressure is used to actuate the Blade 123 of the "motion motor, ao that they have a swinging motion executes from one end position to the other to move the moving device 12 of the washing machine to and fro. The anti-skid valve 26 is in the position shown in FIG

cd! ig. 1 position shown.
σ

CO
CX)

_o If the timer or the selector switch 16 then selects the ο spin cycle, the pump stops operating in the

Direction in which it delivers pressure to line 41 and begins to rotate in the direction in which it

BAD ORiGiNAL

- *> - 15506Ü2

Fluid pressure to ^: Line 40 promotes. The flow developed by the "20" pump is controlled by manual adjustment of the control element "90 which controls the position of the i-cam ring 55 of the pump. Thus, a speed can be selected for the centrifugal movement of the drum 11 by setting the pump displacement by means of the lever 116.

The "pressurized fluid present in line 40" is now conveyed to the centrifugal motor 24 at 189 to to operate this, and the centrifugal motor drives through it the drum 11 to spin dry the laundry.

The locking device 25 is triggered because there is no pressurized fluid in the line 41 is present, the spring 201 moves the piston 197 to left and releases the end portion 199 from engagement with one of the recesses 202 in the outer rotor 186 of the centrifugal motor 24. The existing in the line 40 under Fluid under pressure moves the anti-spin valve 26 in the position shown in Fig. 2 and allows the free flow of exiting fluid under pressure from the centrifugal motor 24 to the tub. There is no fluid pressure in the line 41, the spring serves the purpose of the coupling 25, which was previously a drive connection between the shovel 123 and the movement device

<o 12 had made to disengage.
ο

ο From the description it can be seen that the invention a ο Fluid transmission has been created, that for example can be used in an automatic washing machine- can: .. and. of compact and efficient training iat. i) as

BATH ORIGINAL

Fluid transmission is provided with a variable volume pump that supplies fluid to the To put the drum in a centrifugal motion or to operate the moving device of the Viaschmaschine. Besides-creates the invention a fluid transmission for an automatic Y / ash machine in which certain control valves are omitted can come that were required in previously known operations, since to switch the fluid pressure of the Spin circle to the motion circle no valves are required. This was done in a novel way through creation a pump with two directions of rotation achieved, namely the pump delivers in one direction of rotation to the centrifugal circuit and in the other direction of rotation to the motion cycle.

909830/0785 ..... BATH

Claims (1)

PATENT LAWYERS lOOUOJt dr. ing. H. NEGENDANK · dipl-ing.H.HAUCK · dipl-phys. W. SCHMITZ HAMBURG ■ MUNICH HAMBTJHG 36 · NKÜEH Will 41 TEL. 307 * 28 AND 36 HIU BOHG-VVJLBNEE COHPOEAIIOJi TKiBOH. NÜOEDAPITINT HAMBUH « 200 South Michigan Avenue, Munich iss mozartsth, 23 CHICAGO ^ Illinois. 60604 (USA) Hamburg, December 10, 1966 Claims 1. Fluid transmission, especially for "use in a Washing machine that requires a drum and a movement device to rotate or back and forth alternatively moving here, characterized by a reversible pump (20), a rotating hydraulic motor (24) and a reciprocating Hydraulic motor (22) performing reciprocating movement, the pump being connected in such a way that it applies pressure in one direction of rotation the rotating motor promotes and drives it and in the opposite direction of rotation pressure on the one back and forth The reciprocating motor (22) for driving this motor is brought up, with these connections in the absence can be produced by control valves. 2. Transmission according to claim 1, characterized in that the reversible pump (20) is of variable volume. 3. Transmission according to claim 1 or 2, characterized in that. the rotating hydraulic motor (24) has a fixed displacement. BAD ORIGINAL ₉ ο g ₈ 3 _{0/0 7 8 5} 4. Transmission according to claims 1, 2 or 3, characterized in that that the connection (41) between the reversible pump (20) and the reciprocating Liotor (22) is one with liquid pressure includes actuated clutch (23) to drive the reciprocating motor to an output body, for example, to connect the movement device (12). 5. Transmission according to any one of claims 1 to 4, characterized in that that the rotating hydraulic motor (24) has two rotors (185, 186), one of which (186) is connected in this way is that it gives the drum (11) a spinning motion, and with the other rotor (185) one by hydraulic pressure actuated lock (25) can be brought into cooperation and precautions are taken to control the pump (2ü) to connect to the lock in order to actuate it, whereby a cooperation of the locking device (25) holds the first rotor (186) with the other rotor (185) and thus keeps the drum stationary. 6. Transmission according to claim 5, characterized in that the lock (25) has a piston (197) with an attached thereto Comprises the tappet (198) and the second rotor (185) has at least one recess (202), and the tappet with the recess can come into cooperation with respect to the rotor (185) to hold a rotary motion. 7. Transmission according to any one of claims 1 to 6, characterized in that that the connection (40) between the rotating hydraulic motor (24) and the reversible pump (20) is a valve 909830/0785 _{BAD 0RiG1} HAL (26), conduits (42) being provided to allow discharge from the motor (24) and valve, that too connected to the dispensing device, including a fluid restriction (229) »whereby the valve the dispenser throttles when the engine is no pressure receives more of the pump (20) to increase the orbital motion of the To decelerate the motor and thereby act as a brake for the output body, e.g. E. the drum (11) ,. to act. 8. Transmission according to claim 7 »characterized in that the valve (26) has a So-hieber (221) which is in Depending on the pressure in the connection (40) moved into a position in which an unthrottled outlet from the Outlet device is provided. 9ο transmission according to claim 7 or 8, characterized in that the valve. (26) includes a spring (222) which presses the slide (221) into a position in which a throttled outlet is provided for the liquid from the outlet device, this slide depending on the in the Link. (40) · prevailing pressure is moved to a position in which an unthrottled outlet for the liquid from the Abiali device is provided. 10. Transmission according to any one of claims 2 to 9, characterized through two fluid outlet circuits (40 and 41) for the reversible pump (20), the pump being able to apply pressure to one of the circles in one direction of rotation and in the other direction of rotation to apply pressure to the other of the circles, one of these circles requiring different pressures than BATH ORIGINAL 9 09830/0785 the other circles, with two controls (90, 91) for the pump is provided and the pump has a cam ring (55) which "changes the displacement of the pump when it is moved, and levers (117, 116) for each control device, one of the two control elements controlling the displacement of the pump in Changes depending on the corresponding lever when the pump delivers pressure to the other of the circuits and the other control the displacement of the pump over a different pressure range depending on the corresponding one Lever changes when the pump delivers pressure to the other circuit. 11. Transmission according to claim 10, characterized in that each control element (90, 91) contacts the movable mock ring (55) and the control elements are each formed in two parts (104, HO) and a slip connection (112, 113) between exhibit, whereby the control elements (90, 91) »which are ineffective at a certain point in time, collapse can thereby prevent malfunction of the pressure control valve which controls the reversible pump (20). 12. Transmission according to claims 10 or 11, characterized in that that the control elements (90, 91) each receive pressure from one of the circuits (40, 41), whereby each control element only becomes effective when there is pressure in its corresponding circuit. 13. Transmission according to any one of claims 1 to 12, characterized in that that the reciprocating hydraulic motor (22) comprises a housing (120) in which an output shaft (124) is stores and a chamber (122) is formed, and that one Shovel (125) with the drainage awe lie, "for example the Movement device (12), connected to the drive and to Execution of a pivoting movement between a first and second end position is arranged in the chamber, this Blade has an integrally formed hub section (125a), about the axis of which the blade rotates, and that further in the housing a control valve (121) between two axial Layers is movable and two fluid channels in the housing (157, 158) are connected to the control valve and the chamber on opposite sides of the blade, with the valve has a pressure connection in its one axial position. to the chamber (122) on one side of the shovel (123) produced through one of the channels, whereby the blade is moved from the first to the second end position, and upon displacement in its other axial position creates a pressure connection to the chamber through the other channel in order to remove the blade from the second end position to move into the first, and that further two openings (149, 150) on opposite sides of the Axis provided in the area of the hub portion in the housing are, and a line (155, 156) also in the housing for each of these openings, the pressure lines the Connect openings at opposite ends of the valve and pressure supply means (147, 151) in the hub portion _{o are connected} to the pressure delivered by the pump, oo the un each end position of the shovel the pressure on an opening ω ° bringing the pressure to one end of the valve. ° leads to bring the valve into the other axial position, oo. or the movement of the blade from one end position to the other initiate and thereby the output shaft (124). to move back and forth. 14. Transmission according to claim 13, characterized in that the Hub portion (123a) includes recesses (148) which release the pressure from one of the openings' when both layers of the Valve (121) in one of the end positions, the pressure supply device in the hub section pressure to the other opening leads. 15. Transmission according to claim 13 or 14, characterized in that the pressure feeder has a circular groove (147) the hub (123a) in connection with the pressure source (20) and an opening (151) in the navel in connection with this includes. 16. Transmission according to claim 13, 14 or 15, characterized by Openings (149, 136, 137) in the housing (120) on one side of the axis in the area of the hub section (123a), and hand actuation means (235), which are connected to the control valve and the openings, whereby the manual control device is able to selectively connect any port to the position control valve (121) and thereby the location of one of the To change the end positions of the shovel (123). 17. Transmission according to any one of claims 2 to 16, characterized in that that the pump (20) has a housing (56), one in the cd housing mounted rotor (58) and a rotor surrounding the rotor co squat ring (55), with radial slots in the rotor £? (59a) are formed and in each slot a shovel (59) _o glider-φ, one end of which touches the squat ring, to chambers limit, while between the housing, the rotor and the in Cam ring an orifice plate (62) is arranged and two cavities (64, 63) are formed in this orifice plate, while , JBinlaiS and outlet channels (68, 69) in the housing, respectively communicate with one of these cavities and have first arcuate openings (82, 84) in the orifice plate Establish a connection between each of these cavities and one of the chambers and create second arcuate openings (83, 85) establish a connection between each of these cavities and one of the slots in the orifice plate, whereby the pressure present in the cavities to the slots in the Area of each cavity is conveyed around the blades to press into cooperation with the cam ring. 18. Transmission according to claim 17, characterized in that one of the cavities (64, 65) as a pressure supply device acts for the pump (20) and the other cavity comprises the pressure outlet for the pump. · 19. Transmission according to claim 17 or 18, characterized in that in the orifice plate (62) third arcuate openings (78, 79) are provided, which serve to pressure from the Pressure outlet cavity of pump (20) to slots (59a) in the area of the rotor (58) between the cavities to lead. .: .. ν - -. 20. Transmission according to claims 17 »18 or I9, characterized ο through recesses (71) in the opening plate (62), which the to °° Exhaust pressure cavity with the third arcuate openings (78, 79) connect. -3 c-. Blank page