EP3849874A1 - Transport device, in particular a pram - Google Patents
Transport device, in particular a pramInfo
- Publication number
- EP3849874A1 EP3849874A1 EP19750069.7A EP19750069A EP3849874A1 EP 3849874 A1 EP3849874 A1 EP 3849874A1 EP 19750069 A EP19750069 A EP 19750069A EP 3849874 A1 EP3849874 A1 EP 3849874A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transport device
- detection unit
- designed
- time
- state
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0026—Propulsion aids
- B62B5/0033—Electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0026—Propulsion aids
- B62B5/0069—Control
Definitions
- the present invention relates to a transport device, in particular a pram, with at least three wheels and with a handle for a user, at least one wheel of the at least three wheels being designed as a drive wheel which can be driven by an electric motor by means of an associated electric drive unit to enable at least partial electromotive support of a manual pushing or pulling operation of the transport device by the user.
- Transport devices designed as pushchairs with active support of a user in pushing or pulling operation by drive wheels which can be driven by an electric motor are known from the prior art.
- a drive system of a transport device in particular of a stroller of this type, can be designed to recognize a possible absence of a user or a release of the stroller by the user, so that accidents caused by a person moving independently and in an uncontrolled manner Strollers can at least essentially be prevented.
- Electrified strollers are known in which the presence of a user can be detected by at least one force sensor.
- the present invention provides a transport device, in particular a stroller, with at least three wheels and with a handle for a user, at least one wheel of the at least three wheels as Drive wheel is formed, which can be driven by an electric motor by means of an assigned electric drive unit, in order to enable at least partial electromotive support of a manual pushing or pulling operation of the transport device by the user.
- a status recognition unit is provided which is designed to recognize a current operating status of the transport device.
- the invention thus makes it possible to provide a transport device in which a current operating state of the transport device can be determined reliably and reliably by the state detection unit.
- a current operating state can thus be detected easily and uncomplicatedly, and an undesired behavior of the transport device can be recognized and thus prevented.
- the state detection unit preferably has a detection unit for detecting time-dependent measurement signals, the state detection unit determining the current operating state of the transport device as a function of the detected time-dependent measurement signals.
- a current operating state can thus be detected in a simple manner, as a result of which a safe transport device can be provided.
- the detected time-dependent measurement signals of the transport device are preferably speed signals, acceleration signals and / or acceleration change signals. In this way, a suitable time-dependent measurement signal can be provided in a simple and uncomplicated manner, with which a current operating state can be determined.
- the detected time-dependent measurement signals are assigned to a matrix.
- the detected time-dependent measurement signals can thus be clearly displayed.
- the state recognition unit preferably has a pattern recognition which is designed to assign a pattern associated with the current operating state from the time-dependent measurement signals certified in the matrix detect. A current operating status can thus be recognized in a simple manner.
- the state detection unit is preferably designed to detect at least acceleration and / or braking of the transport device as the current operating state. An unwanted movement of the transport device can thus be determined and prevented safely and reliably.
- the state detection unit is assigned a blocking detection unit which is designed to detect at least one blocking of the transport device as the current operating state. Blocking of the transport device can thus be detected easily and uncomplicatedly.
- a test signal can preferably be applied to the at least one drive wheel, the blocking detection unit being designed to determine whether the transport device is blocked, at least on the basis of the change in position of the transport device generated by the test signal. Blocking, in particular blocking of the transport device caused by an activated brake, can thus be reliably and reliably detected.
- a position change limit value is preferably assigned to the blocking detection unit, and if the position change determined is equal to or greater than the position change limit value, the transport device is in an unblocked state. Blocking of the transport device can thus be determined in a simple manner.
- the at least one drive wheel preferably has an electric motor, in particular a brushless DC motor with a stator and a rotor, the change in position corresponding to a change in the rotor position. An unwanted movement of the transport device by movement of the drive wheel can thus be detected safely and reliably.
- Fig. 1 is a schematic side view of a stroller designed
- FIG. 2 shows a schematic flow diagram assigned to the state detection unit from FIG. 1, FIG.
- FIG. 3 shows an example of the state detection unit from FIGS. 1 and FIG.
- FIG. 4 shows an example of the state detection unit from FIG. 1 and FIG.
- FIG. 5 shows an example of the state detection unit from FIG. 1 and FIG.
- FIG. 6 shows an exemplary state sequence diagram of the state recognition unit from FIGS. 1 and 2.
- the transport device 100 which is designed as an exemplary stroller 102.
- the transport device 100 can also be a wheelbarrow, a hand truck, a disposal container, in particular a garbage can, a pallet truck or the like.
- the stroller 102 has, for example, a collapsible chassis 104 and a bed or seat pan 106 with a support 108 arranged therein for a child (not shown). Furthermore, a U-shaped and preferably ergonomically height-adjustable handle 110 is provided on the chassis 104 for a user of the stroller 102, which is also not shown in the drawing.
- the stroller 102 preferably has at least three wheels 1 16, 1 18, 120, 122. Two wheels are preferably arranged on a rear axle and one wheel on a front axle, but two wheels can also be arranged on the front axle and one wheel on the rear axle his.
- At least one wheel is preferably designed as a drive wheel 124, 126.
- the at least one drive wheel 124, 126 can preferably be driven by an electric motor by means of at least one electrical drive unit 142.
- the at least one drive wheel 124, 126 can be arranged on the front axle and / or the rear axle. At least two wheels are preferably designed as drive wheels 124, 126.
- the stroller 102 here has, by way of example only, three wheels 116, 118, 120, 122, of which the rear wheel 118 is designed as a drive wheel 124, which can be driven by means of the electric drive unit 142.
- the electric drive unit 142 provides at least partial electromotive support for manual pushing or pulling operation of the stroller 102 in a preferred pushing or pulling direction 112 on a substantially horizontal surface 180 or on a surface that is inclined or inclined at an angle f with respect to this 182.
- the electric drive unit 142 here essentially comprises an electric motor 150, which can be implemented, for example, with a brushless, permanent-magnet DC motor 152 and preferably a gear unit for optimal speed and torque adaptation to the operating requirements of the Transport device 100, or the stroller 102 has.
- the drive unit 140 is preferably controllable by means of an electronic control device 170.
- the two front wheels 116, 122 can also be designed as drive wheels 124, 126, the drive wheels 124, 126 in such a constellation for realizing the electromotively assisted pushing or pulling operation of the
- the stroller 102 can preferably be driven individually by means of an electric drive unit 142 and can be controlled independently of one another with the aid of the control device 170.
- the further electric drive units 142 are preferably each equipped with an electric motor, in particular with a brushless, permanently excited DC motor, and with a gear.
- the manual and at least partially electric motor-assisted pushing or pulling operation takes place and / or is maintained preferably only when a user force Fu acts on the bracket 110 of the stroller 102.
- the weight force F g m * g, which is independent of the electric drive unit 140, acts on the stroller 102, where m represents the (total) mass of the stroller 102, which is generally unknown.
- the at least one electric drive unit 142 controlled by the control device 170, together with the user force Fu, causes speed changes with respect to the current speed v of the stroller 102.
- a status detection unit 170 is preferably assigned to the transport device 100.
- the status detection unit 170 is designed to recognize a current operating status of the transport device 100.
- the status recognition unit 170 is preferably designed to recognize a situation or a status, in particular an operating status of the stroller 102, in order to preferably detect whether e.g. B. a user has moved or released the stroller 102.
- external influences that can act on the stroller 102 such as e.g. B. a gust of wind can be detected.
- the status detection unit 170 preferably has a detection unit 172 for the detection of time-dependent measurement signals (210 in FIG. 2).
- the state detection unit 170 preferably determines the current operating state of the transport device 100 as a function of the detected time-dependent measurement signals (210 in FIG. 2).
- the detected, time-dependent measurement signals of the transport device 100 are preferably speed signals ( v in FIG. 2), acceleration signals (a in FIG. 2) and / or acceleration change signals (since in FIG. 2).
- the status detection unit 170 is preferably designed to recognize at least an acceleration and / or braking of the transport device 100 as the respective current operating status.
- the state detection unit 170 is assigned a blocking detection unit 174.
- the blocking detection unit 174 is preferably designed to detect at least one blocking of the transport device 100 as the current operating state.
- the blocking detection unit 174 is preferably assigned a position change limit value, an unblocked state of the transport device 100 being detected in the event of a determined position change that is equal to or greater than the position change limit value. An existence of a non-blocked state of the transport device 100 can thus be determined.
- the change in position preferably corresponds to a change in rotor position of the rotor assigned to electric motor 150.
- the change in position or the change in rotor position corresponds to a change in angle Da of a wheel 116-122 or of the drive wheel 142.
- FIG. 2 shows the state detection unit 170 from FIG. 1, which is designed in accordance with a preferred embodiment and is provided with the reference symbol “205”.
- the detection unit 172 for the detection of time-dependent measurement signals 210 is assigned to the state detection unit 205.
- the status detection unit 205 preferably determines the current operating state of the transport device 100 as a function of the detected, time-dependent measurement signals 210.
- the detected, time-dependent measurement signals 210 of the transport device 100 are preferably speed signals v, acceleration signals a and / or acceleration signals change signals there.
- the detected, time-dependent measurement signals 210 can also be designed as further physical variables, eg B. as a pitch angle.
- the detected, time-dependent measurement signals 210 are preferably assigned to a matrix 215.
- the matrix 215 in FIG. 2 has five columns 216 and, by way of example, three rows 217, 218, 219. However, it is pointed out that the matrix 215 can also have any other number of columns 216 and / or rows 217, 218, 219.
- a column 216 preferably illustrates a measurement at an assigned point in time. Acceleration signals a and a1, a2, a3, a4, a5 are also preferably assigned to row 217, and speed signals v and a are preferably assigned to row 218. Assigned to v1, v2, v3, v4, v5, and the row 219 are preferably assigned acceleration change signals da or dal, da2, da3, da4, da5.
- the state recognition unit 205 has a pattern recognition 220, which is designed to recognize a pattern associated with the respectively current operating state (399 in FIG. 3) from the matrix 215 of the detected, time-dependent measurement signals 210.
- An operating state detection 225 assigned to the pattern recognition 220 determines the respective operating state from the assigned pattern (399 in FIG. 3).
- the operating status detection 225 recognizes z. B. whether the stroller 102 is pushed without a user or braked by the user.
- FIG. 3 shows measurement diagrams 300, 320, 340 assigned to state detection unit 205 of FIG. 2 and a diagram 360 assigned to pattern recognition 220.
- Measurement diagrams 300, 320, 340 represent the respectively detected, time-dependent measurement signals 210 and represents the speed signals v, the acceleration signals a and the acceleration change signals da.
- the measurement diagram 300 has an ordinate 301 on which the speed v is plotted in m / s and an abscissa 302 on which the time t in s is plotted.
- a measurement curve 303 represents the measured speed v as a function of time t. Between a time t1 and a time t2, the measurement curve 303 has an area 304 which represents an incline.
- the measurement diagram 320 has an ordinate 321 on which the derivative of the acceleration a or the change in acceleration da is plotted in m / s 3 , and an abscissa 322 on which the time t in s is plotted.
- a measurement curve 323 represents the derived acceleration a or the change in acceleration da as a function of the time t. Analogously to the measurement curve 303 of the diagram 300, the measurement curve 323 has a region 324 between the time t1 and the time t2 , which represents a change in the change in acceleration.
- the measurement diagram 340 has an ordinate 341, on which the acceleration a is plotted in m / s 2 , and an abscissa 342, on which the time t in s is plotted.
- a measurement curve 343 represents the measured and / or determined acceleration a as a function of the time t.
- the measurement curve 343 has an area 344 between a time t1 and a time t2, which represents a significant slope.
- the diagram 360 has an ordinate 361 and an abscissa 362.
- a state change or a state 0 and a state 1 is plotted on the ordinate 361, and a time t in s is plotted on the abscissa 362.
- a curve 363 represents a change of state or a pattern recognition as a function of a time t.
- the curve 363 has an area 364 between a time t1 and a time t2.
- the area 364 preferably illustrates a pattern recognition or a change in the curve 363 from a state 0 to a state 1.
- the pattern recognition 220 Based on the changes in the areas 304, 324, 344, 364, the pattern recognition 220 recognizes a pattern 399 assigned to an operating state. Depending on the pattern 399, the operating status recognition 225 of FIG. 2 determines a current operating status of the stroller 102. Illustratively illustrated the pattern 399 illuminates an independent acceleration of the pram 102, an acceleration or increase in the speed v of the pram 102 being shown in the area 344 or the area 304.
- FIG. 4 shows a diagram 400 assigned to the blocking detection unit 174 of FIG. 1.
- the diagram 400 illustrates the torque test signals T 1, T2 connected to the stroller 102 or the preferably two drive wheels 124, 126.
- a test signal T1, T2 can preferably be applied to at least one, preferably both drive wheels 124, 126.
- the blocking detection unit 174 is designed to determine whether the stroller 102 is blocked, at least on the basis of the changes in position of the transport device 100 or the stroller 102 generated by the test signal T1, T2.
- the test signal T1 is preferably the drive wheel 124 and the test signal T2 is assigned to the drive wheel 126.
- the test signals T1, T2 are preferably designed as torque test signals.
- the diagram 400 has a diagram 410 and a diagram 420, the diagram 410 being associated with the test signal T1 and the diagram 420 being associated with the test signal T2.
- the diagram 410 has an ordinate 411 on which a torque is plotted and an abscissa 412 on which a time t is plotted.
- diagram 420 has an ordinate 421, on which a torque is plotted, and an abscissa 422, on which a time t is plotted.
- the two diagrams 410, 420 preferably have three sections 431, 432, 433. However, it is pointed out that the configuration of the two diagrams 410, 420 with three areas is only of an exemplary nature and should not be seen as a limitation of the invention.
- the two diagrams 410, 420 can thus also have fewer than three or more than three regions.
- area 431 extends from time 0 to time t11
- area 432 extends from time t11 to time t12
- area 433 extends from time t12 to time t13.
- the area 431 clarifies a test signal for a movement of the stroller 102 in the longitudinal direction or in the pushing or pulling direction 112. Both drive wheels 124, 126 are driven or acted upon in a common direction of rotation. As a result, when the stroller 102 is not blocked, the stroller 102 moves in the pushing or pulling direction 112. The movement of the stroller 102 can be a forward movement or a backward movement.
- area 432 illustrates a test signal for a right turn. In this case, the test signal T1 is designed to drive the drive wheel 124 to rotate forward, and the test signal T2 is designed to drive the drive wheel 126 to rotate backwards.
- the area 433 illustrates a test signal for a rotation to the left of the pushchair 102.
- the test signal T1 is preferably designed to drive the drive wheel 124 in a reverse direction
- the test signal T2 is designed to drive the drive wheel 124 in a forward direction
- a drive curve 413, 423 assigned to the test signal T1, T2 illustrates a loading of the drive wheels 124, 126.
- a forward movement of the drive wheels 124, 126 is represented by a rising straight line
- a backward movement of the drive wheels 124, 126 is indicated by a falling straight line or a straight line arranged in a negative region of the ordinates 41 1, 421 is shown.
- the test signals T1, T2 are applied in the opposite direction.
- FIG. 5 shows a diagram 500 with an ordinate 51 1, on which an acceleration a is plotted, and with an abscissa 512, on which a time t is plotted.
- a measurement curve 515 assigned to the diagram 500 illustrates an acceleration a as a function of the time t.
- Diagram 500 preferably illustrates a program for monitoring the presence of a user on pram 102, in particular on handle 110 of pram 102.
- Diagram 500 is preferably assigned an illustratively upper threshold 513 and an illustratively lower threshold 514.
- the two thresholds 513, 514 are designed as horizontal lines or acceleration values.
- threshold 513 has a positive acceleration value
- threshold 514 preferably has a negative acceleration value.
- the measurement curve 515 has a value, in particular an acceleration value a, which lies between the illustratively upper threshold 513 and the illustratively lower threshold 514, a user is present on the stroller 102, in particular on the handle 110. If the measurement curve 515 exceeds the illustratively upper threshold 513 and / or the illustratively lower threshold 514, it can be assumed that a user is then not present at the stroller 102 and the stroller moves unintentionally.
- a user presence of a From time 0 to a time t21 or in an area 520 of the measurement curve 515, and from a time t22 to a time t23 or in an area 522, and from a time t24 to a time t25 or in a region 524, and from a point in time t26 to a point in time t27 or in a region 526.
- FIG. 6 shows an exemplary flowchart 600 that is assigned to the blockage detection unit 174 of FIG. 1.
- the flow diagram 600 determines whether the stroller 102 is blocked.
- the stroller 102 is arranged in a non-blocked state.
- a query is made as to whether the user is present on the stroller 102 or not. This is preferably done using the diagram in FIG. 5.
- step 611 the stroller 102 is also in the unlocked state. If an absence of the user on the stroller 102 is detected, a step 612 takes place in which a current rotor position of the drive wheels 124, 126 is detected. Here, too, a user is not present on the stroller 102, and the stroller 102 is preferably in a non-blocked state.
- the drive wheels 124, 126 are subjected to the test signals T1 and T2 from FIG. 4.
- the pushchair 102 or the drive wheels 124, 126 are preferably acted upon in step 613 with the test signal T1, T2 for testing a forward movement. If none of the drive wheels 124, 126 moves here beyond a predetermined position change limit value, the next step takes place, in this case step 614. However, if at least one drive wheel 124, 126 moves beyond a position change limit value, then movement takes place the stroller 102 unwanted.
- the brake of the stroller 102 is then activated in a step 618.
- the current rotor position of the stroller 102 is then detected again in step 612.
- a further check is carried out in step 61 1 as to whether the user is on Stroller 102 is present. If the position change limit value was not detected in step 613, step 614 takes place, in which a test is carried out to determine whether the stroller 102 is turning to the right. This takes place with the test signal T1, T2 from FIG. 4 or the signals in the area 432 of the diagram 400.
- step 615 it is tested whether the stroller 102 is moved to the left or there is a left turn. If the change in position limit value is not exceeded in step 615, step 616 takes place. In step 616, the stroller 102 is in a blocked state in which the brake is activated. The stroller 102 is placed in a standby mode in a step 617. If the stroller 102 is “awakened” or activated from the standby mode of step 617, the rotor position is checked again in step 612. If the stroller 102 is not switched to the standby mode 617 in step 616, the rotor position is checked again in step 612.
- step 614 If an exceeding of the position change limit value was detected in step 614 or step 615, an unblocked state is also detected here in step 619 analogously to step 613. Subsequently, as described above, the brake is activated and a new check of the Stroller 102 takes place.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Handcart (AREA)
- Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018215506.2A DE102018215506A1 (en) | 2018-09-12 | 2018-09-12 | Transport device, especially a stroller |
PCT/EP2019/069719 WO2020052841A1 (en) | 2018-09-12 | 2019-07-22 | Transport device, in particular a pram |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3849874A1 true EP3849874A1 (en) | 2021-07-21 |
Family
ID=67551338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19750069.7A Withdrawn EP3849874A1 (en) | 2018-09-12 | 2019-07-22 | Transport device, in particular a pram |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3849874A1 (en) |
CN (1) | CN113039113A (en) |
DE (1) | DE102018215506A1 (en) |
WO (1) | WO2020052841A1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3441568B2 (en) * | 1995-08-28 | 2003-09-02 | 松下電工株式会社 | Wheelbarrow |
JP3222735B2 (en) * | 1995-08-28 | 2001-10-29 | 松下電工株式会社 | Wheelbarrow |
GB2402915A (en) * | 2003-06-17 | 2004-12-22 | Brian Hartley | Selectively driven electrically powered wheelbarrow |
JP2005306082A (en) * | 2004-04-16 | 2005-11-04 | Toyota Motor Corp | Road surface friction coefficient detection device |
DE202010009628U1 (en) * | 2010-06-29 | 2011-10-20 | Zawione Gmbh | Stroller with electric drive |
DE102012010456A1 (en) * | 2012-05-26 | 2013-11-28 | Kiekert Aktiengesellschaft | Motor vehicle door lock |
PL2818382T3 (en) * | 2013-06-24 | 2019-11-29 | Goodbaby Mechatronics S R O | Automatic electrical propulsion for prams or stroller |
DE102013224885A1 (en) * | 2013-12-04 | 2015-06-11 | Robert Bosch Gmbh | Stroller with drive support |
WO2016013534A1 (en) * | 2014-07-23 | 2016-01-28 | 株式会社村田製作所 | Push cart |
JP6620326B2 (en) * | 2015-07-02 | 2019-12-18 | Rt.ワークス株式会社 | Wheelbarrow |
DE102016211916A1 (en) * | 2016-06-30 | 2018-01-04 | Robert Bosch Gmbh | Pushchair comfort device, stroller underframe and stroller |
DE102017207087A1 (en) * | 2017-04-27 | 2018-10-31 | Robert Bosch Gmbh | Electric motor driven wheel device |
DE202017104166U1 (en) * | 2017-07-12 | 2018-10-15 | Cybex Gmbh | Stroller frame and stroller |
-
2018
- 2018-09-12 DE DE102018215506.2A patent/DE102018215506A1/en active Pending
-
2019
- 2019-07-22 EP EP19750069.7A patent/EP3849874A1/en not_active Withdrawn
- 2019-07-22 WO PCT/EP2019/069719 patent/WO2020052841A1/en unknown
- 2019-07-22 CN CN201980074240.7A patent/CN113039113A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102018215506A1 (en) | 2020-03-12 |
WO2020052841A1 (en) | 2020-03-19 |
CN113039113A (en) | 2021-06-25 |
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