CA1273551A - Electromotively operated kitchen appliance - Google Patents
Electromotively operated kitchen applianceInfo
- Publication number
- CA1273551A CA1273551A CA000517092A CA517092A CA1273551A CA 1273551 A CA1273551 A CA 1273551A CA 000517092 A CA000517092 A CA 000517092A CA 517092 A CA517092 A CA 517092A CA 1273551 A CA1273551 A CA 1273551A
- Authority
- CA
- Canada
- Prior art keywords
- tool
- tool shaft
- kitchen appliance
- shaft
- cover
- 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 - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/07—Parts or details, e.g. mixing tools, whipping tools
- A47J43/075—Safety devices
- A47J43/0761—Safety devices for machines with tools driven from the lower side
- A47J43/0772—Safety devices for machines with tools driven from the lower side activated by the proper positioning of the cover
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/046—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven with tools driven from the bottom side
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/07—Parts or details, e.g. mixing tools, whipping tools
- A47J43/08—Driving mechanisms
- A47J43/085—Driving mechanisms for machines with tools driven from the lower side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/22—Safety devices specially adapted for cutting machines
- B26D7/24—Safety devices specially adapted for cutting machines arranged to disable the operating means for the cutting member
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Crushing And Pulverization Processes (AREA)
- Food-Manufacturing Devices (AREA)
Abstract
Abstract of the Disclosure This invention is directed to an electromotively operated kitchen appliance (1) including a drive shaft (15) arranged in a housing body (2) and a tool shaft (18) engageable with the drive shaft (15) via a coupling (24). The tool shaft (18) serves to drive a tool (48) used for the processing of food and con-nected with the tool shaft (18) in a non-rotatable relationship thereto. The relatively non-rotatable connection between the tool shaft (18) and the drive shaft (15) is not established until the tool (42, 48) imparts an axial displacement motion to the tool shaft (18) in its longitudinal direction for the purpose of engaging the claw coupling (24) in opposition to the force of a spring element (35). The tool (42, 48) is directly mounted on the tool shaft (18).
(FIG. 1)
(FIG. 1)
Description
~Z73551 This invention relates to an electromotively operated kitchen appliance including a drive shaft arranged in a housing body and a tool shaft which is engageable with the drive shaft via a coupling, is coupled in a non-rotatable relationship to a tool operated to process food, and is operatively engageable with the drive shaft only when the tool shaft experiences an axial-displacement motion in its longitudinal direction in opposition to the force of a spring element.
An electromotively operated kitchen appliance of this type is already known from German prior published patent application DE-A1 2,813,168. This kitchen appliance, which is configured as a shredder, in-corporates a motor body, a container adapted to be secured to the motor body for shredding food, and a cover adapted to close the container. In the motor body, the electric motor is connected with a gear drive including a claw coupling whose output coupling half has a drive shaft secured thereto through a pin, the drive shaft extending through the motor body and projecting into the container of the shredder. The drive shaft is rotatably carried in the motor body, its free end which extends outside of the motor body being connected with a drive member in a non-rotatable relationship thereto via a tooth system. The drive member is also rotatably mounted in the motor body and has at its free end a carrier device formed by a hexagon and engaged by a tool in a non-rotatable relationship thereto, the tool incorporating a tool disc and a supporting disc, with the supporting disc providing the relatively non-rotatable connection with the drive member.
An electromotively operated kitchen appliance of this type is already known from German prior published patent application DE-A1 2,813,168. This kitchen appliance, which is configured as a shredder, in-corporates a motor body, a container adapted to be secured to the motor body for shredding food, and a cover adapted to close the container. In the motor body, the electric motor is connected with a gear drive including a claw coupling whose output coupling half has a drive shaft secured thereto through a pin, the drive shaft extending through the motor body and projecting into the container of the shredder. The drive shaft is rotatably carried in the motor body, its free end which extends outside of the motor body being connected with a drive member in a non-rotatable relationship thereto via a tooth system. The drive member is also rotatably mounted in the motor body and has at its free end a carrier device formed by a hexagon and engaged by a tool in a non-rotatable relationship thereto, the tool incorporating a tool disc and a supporting disc, with the supporting disc providing the relatively non-rotatable connection with the drive member.
2 ~.
~73551 In this kitchen appliance, it is to be considered as less advantageous that koth the drive shaft and the drive member are rotatably carried in the motor body independently of each other. This renders the bearing of these parts complex and costly, in addition to making the shredder more susceptible to trouble.
Further, in order to avoid that the drive member and the drive shaft are carried in the container on one side only, an additional bearing is provided for these parts which consists in that the drive shaft takes support, via the drive member and via the supporting disc, in a bore provided in a partition wall of the container. In view of the tolerances occurring in the manufacture of the motor body and the container which may easily add up when these parts are assembled, a relatively large radial clearance is provided between the bore and the cylindrical shank of the supporting disc. As a result of the transverse forces occurring in operation, this may cause premature wear of this bearing, whereby a failure of the shredder is ultimate-ly bound to occur. Also the other bearings may be affected thereby, in such a manner that also a break--down of the drive unit may occur.
It is, therefore, an object of this invention to provide an electromotively operated kitchen appliance with an integrated safety device, which incorporates a simple and easy-to-manufacture drive unit and has a long life.
This object is accomplished according to this in-vention in that the tool is directly mounted on the tool shaft and that a displacement of the tool shaft :
1;~73551 involves its displacement in conjunction with the tool.
sy mounting the tool directly on the tool shaft, addi-tional bearing points are avoided, thereby making the kitchen appliance last longer. Because the tool dis-placement occurs simultaneously with the tool shaft during the engagement procesS, material wear between these parts is avoided and the bearing clearance in the tooth system remains substantially unchanged.
To ensure that the tool remains fixed in place on the tool shaft with the kitchen appliance in operation, an improvement of the invention provides for the dis-placement of the tool shaft to ke initiated by the tool.
In the operation of the kitchen appliance, a relative movement between the tool and the tool shaft is thus avoided, so that the relatively non-rotatable connection is not subject to wear. The tolerance clearance between these parts which existed when the kitchen appliance was new is thereby maintained, so that the tool is prevented from wobbling on the tool shaft. The tool is firmly and securely fixed in place on the tool shaft by providing for the tool to be slipped on the tool shaft until its abutment with a stop. The stop may be a circlip secured to the tool shaft or an annular collar formed on the tool shaft, for example.
In kitchen appliances which, to ensure safety, are equipped with a geared coupling, the problem exists that during the engagement process and with the motor running the tips of the opposed teeth of the-coupling often rub against each other too long until their final engage-ment. This rubbing action causes noisy chatter on the one hand and high tooth wear on the other hand which is even speeded up particularly if the teeth are made of ~ 4 --1'27355~
plastic material. The result is a premature coupling failure amounting at the same time to a total breakdown of the kitchen appliance. In an improvement of the in-vention, these drawbacks are eliminated by providing, in an axial direction on either side of the claw coupling, one or several teeth which protrude relative to the other teeth. By virtue of this arrangement of the in-vention, first the two protruding teeth become abruptly engaged as the two coupling halves approach each other, so that the usual rubbing action does not occur. As soon as the tip of the one protruding tooth of the one coupling half engages with the opposite tooth of the other coupling half, it will be positively engaged with the opposite protruding tooth, causing both coupling halves to rotate at the same speed. As the two coupling halves continue approaching, the recessed teeth will also become engaged with the opposite interdental spaces, thus producing neither noise nor wear.
In a further improvement of the invention, the kitchen appliance is composed of a driving part containing a motor and of a working part seatable thereon such as a juice extractor, citrus fruit press, chopper unit or the like, wherein a gearing is arranged in the working part between the drive shaft and the tool shaft, wherein a coupling half is formed on the output-side driving gear of the gearing, and wherein the driving gear is rotatably mounted on the tool shaft. This arrangement makes it possible to place a variety of appliances for pro-cessing food at varying operating speeds on only one motor body. To avoid additional and costly holding fixtures for the tool, the coupling and the driving gear, these parts are directly m~unted on the tool shaft.
1;~73551 In order to enable the tool shaft to take up the forces of pressure acting on the tool during the pro-cessing of food without appreciable friction losses, in a further improvement of the invention an axial bearing is arranged on the tool shaft on either side of the driving gear, the axial bearing formed inter-mediate the coupling halves establishes an abutment stop with the tool shaft after the claw coupling is engaged, and the other axial bearing supports these parts relative to the housing body. The forces im-parted from the tool to the tool shaft are trans-ferred by the coupling half connected with the tool shaft in a non-rotatable relationship thereto to the axial bearing resting on the driving gear whence they are directed, via the driving gear, to the second axial bearing taking support on the housing body and onwards to the housing body. Accordingly, in view of the low number and low friction of the axial bearings, the drive unit has a high degree of efficiency enabling the drive motor to be built to smaller dimensions.
In particular with appliances having sharp and easily accessible blades such as shredders, in which access to the blades has to be prevented during their operation to avoid injury, the invention provides for the displacement of the tool shaft to be initiated by the cover and to be transferred via the tool to the tool shaft. Thus, with the motor running, the tool connected with the tool shaft is not allowed to turn until the cover has safely closed the housing body.
To enable the cover to be readily secured to the housing body and to ensure that during the operation of the working part the cover remains firmly connected with 1;~7355~
the housing body whereby the coupling is invariably kept engaged by the cover, in a further improvement of the invention the means securing the cover to the housing body are resilient locking elements adapted for engage-ment with the housing body by seating the cover thereon axially. Advantageously, the locking elements can be unlocked manually from outside for ~uick disengagement of the cover from the housing body in order to permit removal and, where applicable, exchange of the tool disc or cleaning of the working part.
It is an advantage to arrange on the cover, con-centrically with the tool shaft, an abutment on which the tool and/or the tool shaft take support in the direction of the force of the spring, when the cover is in the seated condition. With the cover seated in place, the abutment formed on the cover holds the drive shaft invariably in coupling engagement. The abutment can be obtained by particularly simple means using a cup-shaped cap forming a snap-on connection with the cover by means of hooks. Should the cup become damaged, it can be easily exchanged simply by releasing the snap connection from the cap.-For the contact pressure produced during rotation ofthe tool and the tool shaft to be absorbed by the cap without damage, the invention provides for the abutment to be made of a wear-resistant and low-friction material.
The cap which is made of a plastic material slides on a tool disc made of stainless steel. According to the invention, a particularly good friction pair is obtained by using a material made up of about 80~ polyamide and about 20% Teflon.
1~73~S~L
The invention is described in more detail in the following by way of a single embodiment, reference being had to the accompanying drawing, in which:
FIG. 1 is a longitudinal sectional view of a shredder unit in the engaged position, shown without the motor body;
FIG. 2 is a side elevational view of the shredder unit of FIG. 1; and FIG. 3 is a part sectional view of the locking element taken along the line III-III of FIG. 2.
Referring now to FIGS. 1 and 2, there is shown a shredder unit 1 composed of a housing body 2 and a cover 4 secured to and centered on the housing body 2 by means of resilient locking elements 3. Formed on the upper side 5 of the cover 4 is a feed chute 6 ex-tending upwardly when viewing the drawing and serving to receive and feed the food to be processed. On the opposite side of the feed chute 6 is the outer wall 7 of the discharge chute 8 which, extending from the uppe-r side 5 of the cover 4, initially follows a down-ward slope to form a radial extension, then continues ve~tically to the upper side 5. The radially inner wall 9 of the discharge chute 8 is formed by the housing body 2. In the drawing, the opening 10 of the discharge chute 8 points downwards and serves to discharge the food processed by the shredder unit 1. Extending from the lower side 11 of the housing body 2 downwards when viewing the drawing is a step 12 of frusto-conical cross section which is tapered towards its free end and is insertable into a suitable recess of a motor body not ~Z73551 shown in the drawing and holds the shredder unit 1 centered and fixed in place on the motor body.
In FIG. 1, the step 12 has a dish-shaped downwardly open recess 13 in which a coupling half 14 is received.
Via a drive shaft 15 carried in the bottom of the recess 13, the coupling half 14 is connected in a non-rotatable relationship to a toothed gearing 16 adjoining upwardly when viewing the drawing and not explained in greater detail. As required, the gearing 16 may be configured as a step-up or step-down unit. On seating the shredder unit 1 on a motor body, the coupling half 14 will engage a suitable coupling half, not shown, provided on the motor body and is thus connected with the motor drive in a non-rotatable relationship thereto.
On the output side of the gearing 16 is a toothed gear 17 which serves as the driving gear for the tool shaft 18, is centered on the tool shaft 18 and is free to rotate about the tool shaft 18. The tool shaft 18 extends parallel to the axis of, and in a laterally offset relationship to, the drive shaft 15. The tool shaft 18 extends through the housing body 2 from the -bottom to the top when viewing the drawing and is relatively non-rotatably carried in the housing body 2 via calotte bearings 21, 22 formed in the base 19 and, respectively, the cover plate 20. The cover plate 20 is centered on the base 19 and firmly secured to the base 19 by means of screw connections 23. Among other things, the cover plate 20 prevents the ingress of dirt and water in the drive chamber 2~ accommodating sub-stantially the gearing and claw coupling arrangement 16, 24. By means of the calotte bearings 21, 22, a minor offset-axis condition, if any, between the cover plate 20 and the base 19 may be compensated for.
g _ ~735~
The claw coupling 24 and the axial bearings 26, 27 are mounted on the tool shaft 18 intermediate the two calotte bearings 21, 22, with the axial bearings 26, 27 taking the normal forces acting on the tool shaft 18 in the longitudinal direction. Adjoining the calotte bearing 21 upwardly when viewing the drawing are the washer 29, the axial bearing 26, the driving gear 17 with the lower coupling half, the axial bearing 27 and the upper coupling half 28. The axial bearing 27 takes support upon a stop 74 formed on the upper coupling half 28. The normal force which with the shredder unit 1 in operation acts on the tool shaft 18 downwardly when viewing the drawing is transferred, via the coupling half 28 positively engaged with the tool shaft 18, to the axial bearing 28 whence it is directed, via the toothed gear 17, the axial bearing 26, the washer 29 and the calotte bearing 21 formed fast with the housing body, to the base 19.
The claw coupling 24 is composed of the upper and lower ~upling half 28, 17, with the lower coupling half 17 forming at the same time the driving gear. Pro-truding from the end faces 30, 31 close to the respective coupling halves 17, 28 are several circumferentially spaced and radially outwardly extending teeth 32, 33, 34, etc. which in the operating position of the shredder unit 1 shown are in relatively non-rotatable engagement.
On the upper coupling half 28, one tooth 34 protrudes relative to the other teeth 33, etc. provided on this coupling half 28. The end face 31 of the coupling half 28 has preferably four teeth, while the end face 30 of the other coupling half 17 has preferably twelve teeth.
Radially within the teeth 32, 33, 34, etc., a compression spring 35 biased by these parts bears against the two 1~7~355~
coupling halves 17, 28, the spring urging the coupling half 28 together with the tool shaft 18 upwardly when viewing the drawing as the cover 4 is lifted, thereby producing an automatic disengagement action.
The lower side of the cover plate 20 has a friction ring 36 fastened thereto which, following disengagement of the claw coupling 24, becomes frictionally engaged by the upper side 73 of the coupling half 28 as a result of the force of the compression spring 35. The tool shaft 18 extends through the cover plate 20 upwardly when viewing the drawing, through a bore 37 provided in the cover plate 20. The calotte bearing 22 is received in the bore 37. The bore 37 has at its upper end a lip seal 38 sealed to and bearing against the surface of the tool shaft 18. This prevents dirt and water from entering the working chamber 25.
The free end of the tool shaft 18 above the cover plate 20 when viewing the drawing has on its surface a tooth system 39 extending longitudinally of the tool shaft 18, starting at the free end of the tool shaft 18 and extending downwards to an annular collar 40 whose outside diameter is slightly greater than the outside diameter of the tooth system 39. The annular collar 40 is provided above the cover plate 20 on the tool shaft 18. Seated on the tooth system 39 is a hub 41 bearing with its lower edge, when viewing the drawing, against the annular collar 40. The hub 41 is integrally formed with the supporting disc 42 ex-tending substantially plane~parallel and at a small distance above the cover plate 20. Through an upwardly extending tubular neck 43, the supporting disc 42 is connected with the hub 41. From the neck 43, ribs 45 :. :
.
' , ~ ;~735~
extending radially towards the outer edge of the supporting disc 42 are formed on the upper side 44 of the supporting disc 42. The function of the ribs 45 is to improve the circulation of the already shredded food on the supporting disc 42 so that the centrifugal forces acting thereon can convey the food bettér into the discharge chute 8.
Where the neck 43 blends into the hub 41, an annular collar 46 extends radially inwardly on the supporting disc 42, continuing upwardly in a further section of the hub 41. Provided on the outside diameter of this section of the hub 41 is a tooth system 47 which extends parallel to the tooth system 39 and is engagéd by the tool disc 48 through a suitable gearing in a non-rotatable relationship thereto. The tool disc 48 is slipped on the tooth system 47 from above and pushed downwards until it rests against the annular collar 46. The tool disc 48 includes cutting elements not shown in the drawing for cutting the food filled into the feed chute 6 as the tool disc 48 rotates.
~ t its upper end, the bore 49 including the longi-tudinal tooth system terminates in an annular step 50 of reduced diameter upon which the tool shaft 18 takes support via an annular collar 51 provided on the upper end. Next to the annular collar 51 in upward direction is a pin 52 which is formed on the tool shaft 18, ex-tends through the bore 49 on the annular step 50 and rests with its free end against the bottom 53 of the cup-shaped sleeve 54. The sleeve 54 which is open in downward direction extends concentrically around the hub 41. The annular end face 55 provided on the sleeve 54 at the free end of the tubular section is in abutment
~73551 In this kitchen appliance, it is to be considered as less advantageous that koth the drive shaft and the drive member are rotatably carried in the motor body independently of each other. This renders the bearing of these parts complex and costly, in addition to making the shredder more susceptible to trouble.
Further, in order to avoid that the drive member and the drive shaft are carried in the container on one side only, an additional bearing is provided for these parts which consists in that the drive shaft takes support, via the drive member and via the supporting disc, in a bore provided in a partition wall of the container. In view of the tolerances occurring in the manufacture of the motor body and the container which may easily add up when these parts are assembled, a relatively large radial clearance is provided between the bore and the cylindrical shank of the supporting disc. As a result of the transverse forces occurring in operation, this may cause premature wear of this bearing, whereby a failure of the shredder is ultimate-ly bound to occur. Also the other bearings may be affected thereby, in such a manner that also a break--down of the drive unit may occur.
It is, therefore, an object of this invention to provide an electromotively operated kitchen appliance with an integrated safety device, which incorporates a simple and easy-to-manufacture drive unit and has a long life.
This object is accomplished according to this in-vention in that the tool is directly mounted on the tool shaft and that a displacement of the tool shaft :
1;~73551 involves its displacement in conjunction with the tool.
sy mounting the tool directly on the tool shaft, addi-tional bearing points are avoided, thereby making the kitchen appliance last longer. Because the tool dis-placement occurs simultaneously with the tool shaft during the engagement procesS, material wear between these parts is avoided and the bearing clearance in the tooth system remains substantially unchanged.
To ensure that the tool remains fixed in place on the tool shaft with the kitchen appliance in operation, an improvement of the invention provides for the dis-placement of the tool shaft to ke initiated by the tool.
In the operation of the kitchen appliance, a relative movement between the tool and the tool shaft is thus avoided, so that the relatively non-rotatable connection is not subject to wear. The tolerance clearance between these parts which existed when the kitchen appliance was new is thereby maintained, so that the tool is prevented from wobbling on the tool shaft. The tool is firmly and securely fixed in place on the tool shaft by providing for the tool to be slipped on the tool shaft until its abutment with a stop. The stop may be a circlip secured to the tool shaft or an annular collar formed on the tool shaft, for example.
In kitchen appliances which, to ensure safety, are equipped with a geared coupling, the problem exists that during the engagement process and with the motor running the tips of the opposed teeth of the-coupling often rub against each other too long until their final engage-ment. This rubbing action causes noisy chatter on the one hand and high tooth wear on the other hand which is even speeded up particularly if the teeth are made of ~ 4 --1'27355~
plastic material. The result is a premature coupling failure amounting at the same time to a total breakdown of the kitchen appliance. In an improvement of the in-vention, these drawbacks are eliminated by providing, in an axial direction on either side of the claw coupling, one or several teeth which protrude relative to the other teeth. By virtue of this arrangement of the in-vention, first the two protruding teeth become abruptly engaged as the two coupling halves approach each other, so that the usual rubbing action does not occur. As soon as the tip of the one protruding tooth of the one coupling half engages with the opposite tooth of the other coupling half, it will be positively engaged with the opposite protruding tooth, causing both coupling halves to rotate at the same speed. As the two coupling halves continue approaching, the recessed teeth will also become engaged with the opposite interdental spaces, thus producing neither noise nor wear.
In a further improvement of the invention, the kitchen appliance is composed of a driving part containing a motor and of a working part seatable thereon such as a juice extractor, citrus fruit press, chopper unit or the like, wherein a gearing is arranged in the working part between the drive shaft and the tool shaft, wherein a coupling half is formed on the output-side driving gear of the gearing, and wherein the driving gear is rotatably mounted on the tool shaft. This arrangement makes it possible to place a variety of appliances for pro-cessing food at varying operating speeds on only one motor body. To avoid additional and costly holding fixtures for the tool, the coupling and the driving gear, these parts are directly m~unted on the tool shaft.
1;~73551 In order to enable the tool shaft to take up the forces of pressure acting on the tool during the pro-cessing of food without appreciable friction losses, in a further improvement of the invention an axial bearing is arranged on the tool shaft on either side of the driving gear, the axial bearing formed inter-mediate the coupling halves establishes an abutment stop with the tool shaft after the claw coupling is engaged, and the other axial bearing supports these parts relative to the housing body. The forces im-parted from the tool to the tool shaft are trans-ferred by the coupling half connected with the tool shaft in a non-rotatable relationship thereto to the axial bearing resting on the driving gear whence they are directed, via the driving gear, to the second axial bearing taking support on the housing body and onwards to the housing body. Accordingly, in view of the low number and low friction of the axial bearings, the drive unit has a high degree of efficiency enabling the drive motor to be built to smaller dimensions.
In particular with appliances having sharp and easily accessible blades such as shredders, in which access to the blades has to be prevented during their operation to avoid injury, the invention provides for the displacement of the tool shaft to be initiated by the cover and to be transferred via the tool to the tool shaft. Thus, with the motor running, the tool connected with the tool shaft is not allowed to turn until the cover has safely closed the housing body.
To enable the cover to be readily secured to the housing body and to ensure that during the operation of the working part the cover remains firmly connected with 1;~7355~
the housing body whereby the coupling is invariably kept engaged by the cover, in a further improvement of the invention the means securing the cover to the housing body are resilient locking elements adapted for engage-ment with the housing body by seating the cover thereon axially. Advantageously, the locking elements can be unlocked manually from outside for ~uick disengagement of the cover from the housing body in order to permit removal and, where applicable, exchange of the tool disc or cleaning of the working part.
It is an advantage to arrange on the cover, con-centrically with the tool shaft, an abutment on which the tool and/or the tool shaft take support in the direction of the force of the spring, when the cover is in the seated condition. With the cover seated in place, the abutment formed on the cover holds the drive shaft invariably in coupling engagement. The abutment can be obtained by particularly simple means using a cup-shaped cap forming a snap-on connection with the cover by means of hooks. Should the cup become damaged, it can be easily exchanged simply by releasing the snap connection from the cap.-For the contact pressure produced during rotation ofthe tool and the tool shaft to be absorbed by the cap without damage, the invention provides for the abutment to be made of a wear-resistant and low-friction material.
The cap which is made of a plastic material slides on a tool disc made of stainless steel. According to the invention, a particularly good friction pair is obtained by using a material made up of about 80~ polyamide and about 20% Teflon.
1~73~S~L
The invention is described in more detail in the following by way of a single embodiment, reference being had to the accompanying drawing, in which:
FIG. 1 is a longitudinal sectional view of a shredder unit in the engaged position, shown without the motor body;
FIG. 2 is a side elevational view of the shredder unit of FIG. 1; and FIG. 3 is a part sectional view of the locking element taken along the line III-III of FIG. 2.
Referring now to FIGS. 1 and 2, there is shown a shredder unit 1 composed of a housing body 2 and a cover 4 secured to and centered on the housing body 2 by means of resilient locking elements 3. Formed on the upper side 5 of the cover 4 is a feed chute 6 ex-tending upwardly when viewing the drawing and serving to receive and feed the food to be processed. On the opposite side of the feed chute 6 is the outer wall 7 of the discharge chute 8 which, extending from the uppe-r side 5 of the cover 4, initially follows a down-ward slope to form a radial extension, then continues ve~tically to the upper side 5. The radially inner wall 9 of the discharge chute 8 is formed by the housing body 2. In the drawing, the opening 10 of the discharge chute 8 points downwards and serves to discharge the food processed by the shredder unit 1. Extending from the lower side 11 of the housing body 2 downwards when viewing the drawing is a step 12 of frusto-conical cross section which is tapered towards its free end and is insertable into a suitable recess of a motor body not ~Z73551 shown in the drawing and holds the shredder unit 1 centered and fixed in place on the motor body.
In FIG. 1, the step 12 has a dish-shaped downwardly open recess 13 in which a coupling half 14 is received.
Via a drive shaft 15 carried in the bottom of the recess 13, the coupling half 14 is connected in a non-rotatable relationship to a toothed gearing 16 adjoining upwardly when viewing the drawing and not explained in greater detail. As required, the gearing 16 may be configured as a step-up or step-down unit. On seating the shredder unit 1 on a motor body, the coupling half 14 will engage a suitable coupling half, not shown, provided on the motor body and is thus connected with the motor drive in a non-rotatable relationship thereto.
On the output side of the gearing 16 is a toothed gear 17 which serves as the driving gear for the tool shaft 18, is centered on the tool shaft 18 and is free to rotate about the tool shaft 18. The tool shaft 18 extends parallel to the axis of, and in a laterally offset relationship to, the drive shaft 15. The tool shaft 18 extends through the housing body 2 from the -bottom to the top when viewing the drawing and is relatively non-rotatably carried in the housing body 2 via calotte bearings 21, 22 formed in the base 19 and, respectively, the cover plate 20. The cover plate 20 is centered on the base 19 and firmly secured to the base 19 by means of screw connections 23. Among other things, the cover plate 20 prevents the ingress of dirt and water in the drive chamber 2~ accommodating sub-stantially the gearing and claw coupling arrangement 16, 24. By means of the calotte bearings 21, 22, a minor offset-axis condition, if any, between the cover plate 20 and the base 19 may be compensated for.
g _ ~735~
The claw coupling 24 and the axial bearings 26, 27 are mounted on the tool shaft 18 intermediate the two calotte bearings 21, 22, with the axial bearings 26, 27 taking the normal forces acting on the tool shaft 18 in the longitudinal direction. Adjoining the calotte bearing 21 upwardly when viewing the drawing are the washer 29, the axial bearing 26, the driving gear 17 with the lower coupling half, the axial bearing 27 and the upper coupling half 28. The axial bearing 27 takes support upon a stop 74 formed on the upper coupling half 28. The normal force which with the shredder unit 1 in operation acts on the tool shaft 18 downwardly when viewing the drawing is transferred, via the coupling half 28 positively engaged with the tool shaft 18, to the axial bearing 28 whence it is directed, via the toothed gear 17, the axial bearing 26, the washer 29 and the calotte bearing 21 formed fast with the housing body, to the base 19.
The claw coupling 24 is composed of the upper and lower ~upling half 28, 17, with the lower coupling half 17 forming at the same time the driving gear. Pro-truding from the end faces 30, 31 close to the respective coupling halves 17, 28 are several circumferentially spaced and radially outwardly extending teeth 32, 33, 34, etc. which in the operating position of the shredder unit 1 shown are in relatively non-rotatable engagement.
On the upper coupling half 28, one tooth 34 protrudes relative to the other teeth 33, etc. provided on this coupling half 28. The end face 31 of the coupling half 28 has preferably four teeth, while the end face 30 of the other coupling half 17 has preferably twelve teeth.
Radially within the teeth 32, 33, 34, etc., a compression spring 35 biased by these parts bears against the two 1~7~355~
coupling halves 17, 28, the spring urging the coupling half 28 together with the tool shaft 18 upwardly when viewing the drawing as the cover 4 is lifted, thereby producing an automatic disengagement action.
The lower side of the cover plate 20 has a friction ring 36 fastened thereto which, following disengagement of the claw coupling 24, becomes frictionally engaged by the upper side 73 of the coupling half 28 as a result of the force of the compression spring 35. The tool shaft 18 extends through the cover plate 20 upwardly when viewing the drawing, through a bore 37 provided in the cover plate 20. The calotte bearing 22 is received in the bore 37. The bore 37 has at its upper end a lip seal 38 sealed to and bearing against the surface of the tool shaft 18. This prevents dirt and water from entering the working chamber 25.
The free end of the tool shaft 18 above the cover plate 20 when viewing the drawing has on its surface a tooth system 39 extending longitudinally of the tool shaft 18, starting at the free end of the tool shaft 18 and extending downwards to an annular collar 40 whose outside diameter is slightly greater than the outside diameter of the tooth system 39. The annular collar 40 is provided above the cover plate 20 on the tool shaft 18. Seated on the tooth system 39 is a hub 41 bearing with its lower edge, when viewing the drawing, against the annular collar 40. The hub 41 is integrally formed with the supporting disc 42 ex-tending substantially plane~parallel and at a small distance above the cover plate 20. Through an upwardly extending tubular neck 43, the supporting disc 42 is connected with the hub 41. From the neck 43, ribs 45 :. :
.
' , ~ ;~735~
extending radially towards the outer edge of the supporting disc 42 are formed on the upper side 44 of the supporting disc 42. The function of the ribs 45 is to improve the circulation of the already shredded food on the supporting disc 42 so that the centrifugal forces acting thereon can convey the food bettér into the discharge chute 8.
Where the neck 43 blends into the hub 41, an annular collar 46 extends radially inwardly on the supporting disc 42, continuing upwardly in a further section of the hub 41. Provided on the outside diameter of this section of the hub 41 is a tooth system 47 which extends parallel to the tooth system 39 and is engagéd by the tool disc 48 through a suitable gearing in a non-rotatable relationship thereto. The tool disc 48 is slipped on the tooth system 47 from above and pushed downwards until it rests against the annular collar 46. The tool disc 48 includes cutting elements not shown in the drawing for cutting the food filled into the feed chute 6 as the tool disc 48 rotates.
~ t its upper end, the bore 49 including the longi-tudinal tooth system terminates in an annular step 50 of reduced diameter upon which the tool shaft 18 takes support via an annular collar 51 provided on the upper end. Next to the annular collar 51 in upward direction is a pin 52 which is formed on the tool shaft 18, ex-tends through the bore 49 on the annular step 50 and rests with its free end against the bottom 53 of the cup-shaped sleeve 54. The sleeve 54 which is open in downward direction extends concentrically around the hub 41. The annular end face 55 provided on the sleeve 54 at the free end of the tubular section is in abutment
3~51 with the surface of the tool disc 48. Radially within the sleeve 54, the tool disc 48 is provided with an annular collar 56 extending into the annular chamber of the sleeve 54 and having the sleeve 54 in radial out-ward abutment therewith for the purpose of centering the tool disc 48. The tool disc 48 is additionally centered within certain limits by the tooth system 47.
The bottom 53 of the sleeve 54 abutting against the lower side 58 of the cover 4 has circumferentially spaced apertures 57 through which hooks 59 extend to bias the bottom 53 in the interior of the sleeve 54 from behind, thus establishing a positive-engagement connection between the sleeve 54 and the cover 4. The hooks 59 are formed on the lower side 58 of the cover 4.
According to FIGS. 2 and 3, the locking elements 3 diametrically opposed on the shredder unit 1 incorporate each a spring tongue 61 formed on the outer wall 60 and obtained by slots 62 i-n the cover plate 20 extending upwardly from the lower edge of the wall 60, so that only the upper end of the spring tongue 61 is connected with the cover plate 20. The wall 60 serves at the same time for centering the cover 4. From the wall 60, detents 63 of peg-shaped configuration extend radially outwardly on the spring tongue 61 for locking engagement wlth suitable openings 64 provided in the wall 65 of the cover 4 when the cover 4 is seated. The detent 63 has a chamfer 72 at its free upper end. On the wall 65 of the cover 4, an arched cutout 66 is provided inter-mediate the two openings 64 for engagement by a suitable segment 67 protruding from the spring tongue 61. The segment 67 also has a circular projection 68 whose out-wardly pointing annular area 69 is concave. The concave annular area 69 serves to provide a better rest and locating area for the operator's fingers.
For the spring force of the spring tongue 61 to be sufficiently high and remaining high on frequent operation, thereby ensuring at all times that the cover
The bottom 53 of the sleeve 54 abutting against the lower side 58 of the cover 4 has circumferentially spaced apertures 57 through which hooks 59 extend to bias the bottom 53 in the interior of the sleeve 54 from behind, thus establishing a positive-engagement connection between the sleeve 54 and the cover 4. The hooks 59 are formed on the lower side 58 of the cover 4.
According to FIGS. 2 and 3, the locking elements 3 diametrically opposed on the shredder unit 1 incorporate each a spring tongue 61 formed on the outer wall 60 and obtained by slots 62 i-n the cover plate 20 extending upwardly from the lower edge of the wall 60, so that only the upper end of the spring tongue 61 is connected with the cover plate 20. The wall 60 serves at the same time for centering the cover 4. From the wall 60, detents 63 of peg-shaped configuration extend radially outwardly on the spring tongue 61 for locking engagement wlth suitable openings 64 provided in the wall 65 of the cover 4 when the cover 4 is seated. The detent 63 has a chamfer 72 at its free upper end. On the wall 65 of the cover 4, an arched cutout 66 is provided inter-mediate the two openings 64 for engagement by a suitable segment 67 protruding from the spring tongue 61. The segment 67 also has a circular projection 68 whose out-wardly pointing annular area 69 is concave. The concave annular area 69 serves to provide a better rest and locating area for the operator's fingers.
For the spring force of the spring tongue 61 to be sufficiently high and remaining high on frequent operation, thereby ensuring at all times that the cover
4 is securely fixed to the housing body 2, FIG. 3 pro-vides, in addition to the spring tongue 61, a leg spring 70 which is held in a slot 71 formed in the cover plate 20 and rests with its free end resiliently against the spring tongue 61.
The operation of the shredder unit is as follows:
First, the housing body 2 is placed on a motor base not shown in the drawing, so that the coupling half 14 becomes engaged with a motor-driven coupling half which, however, is not shown in the drawing. Then the supporting disc 42 is slipped on the tooth system 39 of the tool shaft 18 and pushed down until it comes to rest against the annular collar 40 of the tool shaft 18. The tool disc 48 is subsequently seated on the tooth system 47 of the supporting disc 42 until it comes to rest against the annular collar 46 of the supporting disc 42. Should the motor be turned on inadvertently in this condition of assembly, neither the supporting disc 42 nor the tool disc 48 nor the tool shaft 18 will start rotating since the two coupling halves 17, 28 are not in gear. This prevents the possibility of personal injury.
If the cover 4 is then placed on the housing body 2, the bottom 53 of the sleeve 54 will abut the pin 52 provided on the tool.shaft 18. However, the cover 4 can be seated only if the.arched cutouts 66 engage the segments 67 of the spring tongues 61. Further displace-ment of the cover 4 will urge the tool disc 48 and the supporting disc 42 downwards,.when viewing the drawing, 7;3551 in opposition to the force of the compression spring 35. As soon as the edge 65 of the cover 4 has reached the detents 63, these will be initially urged radially inwardly as the cover 4 is further displaced. The displacement force necessary for pushing in the detents 63 on the cover 4 is kept within acceptable limits by the chamfers 7~ provided on the detents 63, so that it is predominantly only the displacement force necessary for pushing the tool shaft 18 down that has to be imparted.
The downward movement of the tool shaft 18 will also entrain the upper coupling half 28. As soon as the tip of the protruding tooth 34 engages with a tooth profile of a tooth 32 provided on the lower coupling half 17, the tool shaft 18, the supporting disc 42 and the tool disc 48 will be entrained abruptly should the motor be turned on. In this position, the teeth 33, etc. of the upper coupling half 28 which are recessed relative to the protruding tooth 34 are not yet in engagement with the opposite teeth 32, etc. of the lower coupling half 17. Only on further displacement of the cover 4 will the other teeth 32, 33, etc. become engaged without producing noise. Then the detents 63 will fall into their respective openings 64, and the cover 4 will be in positive engagement with the housing 2. As long as the cover 4 closes the housing body 2, the claw coupling 24 will remain engaged.
In this position, it is possible to fill the feed chute 6 with food which, after turning the motor on, will be shredded by the rotating tool disc 48 and conveyed to the discharge chute 8 by means of the supporting disc 42.
55~
On completion of the shredding operation, normally the motor should be turned off first before the cover 4 is removed from the housing body 2. Failure to do so will still permit unseating of the cover 4 from the housing 2 without the risk of injury by the tool disc 48 existing. As the cover 4 is removed, first the spring tongues 61 will be urged radially inwardly, causing the detents 63 to slide out of their respective openings 64. As a result of the force of the compression spring 35, the tool shaft 18, in conjunction with the supporting disc 42~ the tool disc 48 and the cover 4, will unseat themselves upwards when viewing the drawing.
The claw coupling 24 will be off or disengaged. The upper side 73 of the upper coupling half 28 will become frictionally engaged with the friction ring 36. In this position, the biasing force of the compression spring 35 will still be sufficiently high to urge the upper coupling half 28 against the friction ring 36, whereby the supporting disc 42 and the tool disc 48 will be slowed down to a complete stop promptl~. Accordingly, the tool disc 48 will have come to a complete stop faster than it is possible for the cover 4 to become unseated from the housing body 2.
1~7;~551 1 Shredder Unit 2 Housing Body 3 Resilient Locking Elements 4 Cover Upper Side 6 Feed Chute 7 Wall 8 Discharge Chute 9 Inner Wall Opening 11 Lower Side 12 Step 13 Recess 14 Coupling Half Drive Shaft 16 Gearing 17 Toothed Gear, Coupling Half 18 Tool Shaft 19 Base Cover Plate 21 Calotte Bearing 22 Calotte Bearing 23 Screw Connection -24 Claw Coupling Drive Chamber 26 Axial Bearing 27 Axial Bearing 28 Upper Coupling Half 29 Washer End Face 31 End Face 32 Teeth 33 Tooth 34 Protruding Tooth 1 ~73551 Compression Spring 36 Friction Ring 37 Bore 38 Lip Seal 39 Tooth System Annular Collar 41 Hub 42 Supporting Disc 43 Neck 44 Upper Side Ribs 46 Annular Collar 47 Tooth System 48 Tool Disc 49 Bore Annular Step 51 Annular Collar 52 Pin 53 Bottom 54 Cup-shaped Sleeve End Face 56 Annular Collar 57 Aperture 58 -Lower Side 59 Snap Hook Outer Wall 61 Spring Tongue 62 Slot 63 Detent 64 Opening Edge ~'73S5~
66 Arched Cutout 67 Segment 68 Projection 69 Annular Area Leg Spring 71 Slot 72 Chamfer 73 Upper Side 74 Stop
The operation of the shredder unit is as follows:
First, the housing body 2 is placed on a motor base not shown in the drawing, so that the coupling half 14 becomes engaged with a motor-driven coupling half which, however, is not shown in the drawing. Then the supporting disc 42 is slipped on the tooth system 39 of the tool shaft 18 and pushed down until it comes to rest against the annular collar 40 of the tool shaft 18. The tool disc 48 is subsequently seated on the tooth system 47 of the supporting disc 42 until it comes to rest against the annular collar 46 of the supporting disc 42. Should the motor be turned on inadvertently in this condition of assembly, neither the supporting disc 42 nor the tool disc 48 nor the tool shaft 18 will start rotating since the two coupling halves 17, 28 are not in gear. This prevents the possibility of personal injury.
If the cover 4 is then placed on the housing body 2, the bottom 53 of the sleeve 54 will abut the pin 52 provided on the tool.shaft 18. However, the cover 4 can be seated only if the.arched cutouts 66 engage the segments 67 of the spring tongues 61. Further displace-ment of the cover 4 will urge the tool disc 48 and the supporting disc 42 downwards,.when viewing the drawing, 7;3551 in opposition to the force of the compression spring 35. As soon as the edge 65 of the cover 4 has reached the detents 63, these will be initially urged radially inwardly as the cover 4 is further displaced. The displacement force necessary for pushing in the detents 63 on the cover 4 is kept within acceptable limits by the chamfers 7~ provided on the detents 63, so that it is predominantly only the displacement force necessary for pushing the tool shaft 18 down that has to be imparted.
The downward movement of the tool shaft 18 will also entrain the upper coupling half 28. As soon as the tip of the protruding tooth 34 engages with a tooth profile of a tooth 32 provided on the lower coupling half 17, the tool shaft 18, the supporting disc 42 and the tool disc 48 will be entrained abruptly should the motor be turned on. In this position, the teeth 33, etc. of the upper coupling half 28 which are recessed relative to the protruding tooth 34 are not yet in engagement with the opposite teeth 32, etc. of the lower coupling half 17. Only on further displacement of the cover 4 will the other teeth 32, 33, etc. become engaged without producing noise. Then the detents 63 will fall into their respective openings 64, and the cover 4 will be in positive engagement with the housing 2. As long as the cover 4 closes the housing body 2, the claw coupling 24 will remain engaged.
In this position, it is possible to fill the feed chute 6 with food which, after turning the motor on, will be shredded by the rotating tool disc 48 and conveyed to the discharge chute 8 by means of the supporting disc 42.
55~
On completion of the shredding operation, normally the motor should be turned off first before the cover 4 is removed from the housing body 2. Failure to do so will still permit unseating of the cover 4 from the housing 2 without the risk of injury by the tool disc 48 existing. As the cover 4 is removed, first the spring tongues 61 will be urged radially inwardly, causing the detents 63 to slide out of their respective openings 64. As a result of the force of the compression spring 35, the tool shaft 18, in conjunction with the supporting disc 42~ the tool disc 48 and the cover 4, will unseat themselves upwards when viewing the drawing.
The claw coupling 24 will be off or disengaged. The upper side 73 of the upper coupling half 28 will become frictionally engaged with the friction ring 36. In this position, the biasing force of the compression spring 35 will still be sufficiently high to urge the upper coupling half 28 against the friction ring 36, whereby the supporting disc 42 and the tool disc 48 will be slowed down to a complete stop promptl~. Accordingly, the tool disc 48 will have come to a complete stop faster than it is possible for the cover 4 to become unseated from the housing body 2.
1~7;~551 1 Shredder Unit 2 Housing Body 3 Resilient Locking Elements 4 Cover Upper Side 6 Feed Chute 7 Wall 8 Discharge Chute 9 Inner Wall Opening 11 Lower Side 12 Step 13 Recess 14 Coupling Half Drive Shaft 16 Gearing 17 Toothed Gear, Coupling Half 18 Tool Shaft 19 Base Cover Plate 21 Calotte Bearing 22 Calotte Bearing 23 Screw Connection -24 Claw Coupling Drive Chamber 26 Axial Bearing 27 Axial Bearing 28 Upper Coupling Half 29 Washer End Face 31 End Face 32 Teeth 33 Tooth 34 Protruding Tooth 1 ~73551 Compression Spring 36 Friction Ring 37 Bore 38 Lip Seal 39 Tooth System Annular Collar 41 Hub 42 Supporting Disc 43 Neck 44 Upper Side Ribs 46 Annular Collar 47 Tooth System 48 Tool Disc 49 Bore Annular Step 51 Annular Collar 52 Pin 53 Bottom 54 Cup-shaped Sleeve End Face 56 Annular Collar 57 Aperture 58 -Lower Side 59 Snap Hook Outer Wall 61 Spring Tongue 62 Slot 63 Detent 64 Opening Edge ~'73S5~
66 Arched Cutout 67 Segment 68 Projection 69 Annular Area Leg Spring 71 Slot 72 Chamfer 73 Upper Side 74 Stop
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electromotively operated kitchen appliance including a drive shaft arranged in a housing body, which drive shaft is drivable by a driving part containing a motor, and a gearing following said drive shaft and a coupling which is engageable with a tool shaft rotatably mounted in said housing body, with said tool shaft being coupled in a non-rotatable relationship relative to a tool operated to process food and being operatively engageable with the drive shaft only when the tool shaft experiences an axial-displacement motion in its longitudinal direction in opposition to the force of a spring element, so that one of the coupling halves mounted on the tool shaft engages with an output-side driving gear (17) of the gearing, characterized in that the output-side driving gear (17) is rotatably and axially displaceably mounted on the tool shaft (18) and that an axial bearing (26,27) is arranged on the tool shaft (18) on either side of the driving gear (17), so that the one axial bearing (27) establishes an abutment stop (74) with the tool shaft (18) and the driving gear (17) after a claw coupling (24) is engaged, and that the other axial bearing (26) establishes an abutment stop with the driving gear (17) and the housing body (2).
2. An electromotively operated kitchen appliance as claimed in claim 1, characterized in that the displacement of the tool shaft (18) is initiated by the tool (48).
jrc:mls 20
jrc:mls 20
3. An electromotively operated kitchen appliance as claimed in claim 1 or claim 2, characterized in that the tool (48) is adapted to be slipped on the tool shaft (18) until its abutment with a stop (40).
4. An electromotively operated kitchen appliance as claimed in claim 1, in which the claw coupling (24) has protuding teeth on the end faces of the opposed coupling halves, the teeth being engageable on displacement of the tool shaft, characterized in that one or several teeth (34) protrude relative to the other teeth (33, 32, etc.) in an axial direction on either side of the claw coupling (24).
5. A kitchen appliance as claimed in claim 1, in which the housing body is adapted to be closed by a cover, characterized in that the displacement of the tool shaft (18) is initiated by the cover (4) and is transferred via the tool (48) to the tool shaft (18).
6. A kitchen appliance as claimed in claim 5, characterized in that the means securing the cover (4) to the housing body (2) are resilient locking elements (3) adapted for engagement with the housing body (2) by seating the cover (4) thereon axially.
7.. A kitchen appliance as claimed in claim 6, characterized in that the locking elements (3) can be unlocked manually from outside.
8. A kitchen appliance as claimed in claim 5, characterized in that an abutment (54) is arranged on the cover (4) con-centrically with the tool shaft (18), on which the tool (48) and/or the tool shaft (18) take support in the direction of the force of the spring (35) when the cover (4) is in the seated condition.
9. A kitchen appliance as claimed in claim 8, characterized in that the abutment arrangement (54) consists of a cup-shaped cap connected with the cover (4) through a snap-on connection (59).
10. A kitchen appliance as claimed in claim 8, characterized in that the abutment (54) is made of a wear-resistant and low-friction material.
11. A kitchen appliance as claimed in claim 10, characterized in that the material of the abutment (54) is made up of about 80% polyamide and about 20% polytetrafluorethylene.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853532038 DE3532038C1 (en) | 1985-09-09 | 1985-09-09 | Kitchen utensil operated by electric motor |
| DEP3532038.9-16 | 1985-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1273551A true CA1273551A (en) | 1990-09-04 |
Family
ID=6280421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000517092A Expired - Fee Related CA1273551A (en) | 1985-09-09 | 1986-08-28 | Electromotively operated kitchen appliance |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1273551A (en) |
| DE (1) | DE3532038C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050605A (en) * | 2017-08-18 | 2020-04-21 | 株式会社惠人 | Juice extracting barrel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2692463B1 (en) * | 1992-06-17 | 1994-08-26 | Santos Sa | Electrical apparatus for the treatment of food products, with improved safety device. |
| DE102007038370B4 (en) * | 2007-08-14 | 2015-10-01 | BSH Hausgeräte GmbH | Method for producing a drive shaft |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1300572A (en) * | 1969-05-29 | 1972-12-20 | Kenwood Mfg Woking Ltd | Domestic food treatment appliance |
| US3612126A (en) * | 1969-08-14 | 1971-10-12 | Dynamics Corp America | Liquidizer safety clutch |
| US4095751A (en) * | 1977-03-25 | 1978-06-20 | Oster Corporation | Slicing and shredding apparatus |
| AT355752B (en) * | 1978-05-19 | 1980-03-25 | Philips Nv | PRESS FOR CITRUS FRUIT AND THE LIKE |
-
1985
- 1985-09-09 DE DE19853532038 patent/DE3532038C1/en not_active Expired - Fee Related
-
1986
- 1986-08-28 CA CA000517092A patent/CA1273551A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050605A (en) * | 2017-08-18 | 2020-04-21 | 株式会社惠人 | Juice extracting barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3532038C1 (en) | 1991-09-12 |
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| MKLA | Lapsed |