BATTERY-POWERED HANDHELD VACUUM DEVICE

• US 20140208538A1
• Filed: 01/24/2014
• Published: 07/31/2014
• Est. Priority Date: 01/28/2013
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: ROEHM, Heiko, MARGARITIS, Georgios, VISEL, Benjamin
• Granted Patent: US 9,370,285 B2
• Time in Patent Office: Days
• US Class Current: 15/344
• CPC Class Codes: A47L 5/24 Hand-supported suction cleaners
• CPC Class Codes: A47L 9/122 flat
• CPC Class Codes: A47L 9/22 Mountings for motor fan assemblies
• CPC Class Codes: A47L 9/2884 Details of arrangements of batteries or their installation

Abstract

A battery-powered handheld vacuum device for use on building sites includes: a dust collection box; and a motor housing, in which a drive motor provided with a fan impeller and a battery pack for supplying current to the drive motor independently of an electrical network are provided. The dust collection box is fixed in place on the motor housing in releasable manner. A handle, with which the battery pack engages at least sectionally, is formed on the motor housing.

Claims

1. A battery-powered handheld vacuum device for use on building sites, comprising:

a dust collection box;

a motor housing;

a drive motor having a fan impeller; and

a battery pack for supplying the drive motor with current independently of an electrical network;

wherein the drive motor and the battery pack are provided in the motor housing, and wherein the dust collection box is fixed in place on the motor housing in releasable manner, and wherein a handle, with which the battery pack engages at least regionally in reversible manner, is formed on the motor housing.

2. The battery-powered handheld vacuum device as recited in claim 1, wherein an air opening is formed on the motor housing, and wherein the dust collection box is fixed in place on the air opening in releasable manner.

3. The battery-powered handheld vacuum device as recited in claim 2, wherein a visco-elastic seal configured as an annular sleeve is disposed in the region of the air opening, between the dust collection box and the motor housing, in order to seal the motor housing and the dust collection box.

4. The battery-powered handheld vacuum device as recited in claim 3, wherein the visco-elastic seal is configured to attach at least one of a filter medium and a filter holder supporting the filter medium to the motor housing in airtight manner.

5. The battery-powered handheld vacuum device as recited in claim 4, wherein the filter holder is disposed in the region of the air opening, and wherein the filter medium is mounted on the filter holder.

6. The battery-powered handheld vacuum device as recited in claim 5, wherein the filter holder is disposed at an angle with respect to an axis of rotation of the fan impeller.

7. The battery-powered handheld vacuum device as recited in claim 5, wherein the filter medium is configured in the form of a flat pleated filter which has a rectangular filter base and a multitude of filter pleats, the rectangular filter base being mounted on the filter holder.

8. The battery-powered handheld vacuum device as recited in claim 5, wherein the air opening is disposed at an angle with respect to an axis of rotation of the fan impeller.

9. The battery-powered handheld vacuum device as recited in claim 3, wherein the fan impeller has an outer diameter (432) and the motor housing has at least one outer width in the region of the fan impeller, the at least one width of the motor housing being maximally 125% of the outer diameter of the fan impeller.

10. The battery-powered handheld vacuum device as recited in claim 9, wherein the fan impeller is a radial fan impeller, and wherein a redirection device is provided, on which at least two redirection regions are provided which each have at least one air guidance geometry configured to redirect a radial air flow generated by the radial fan impeller into an air flow which is at least approximately coaxial with respect to the drive motor.

11. The battery-powered handheld vacuum device as recited in claim 10, wherein the at least one air guidance geometry is configured to initially redirect the radial air flow generated by the radial fan impeller around the radial fan impeller in the form of a spiral, prior to the redirection to form the air flow which is at least approximately coaxial with respect to the drive motor.

12. The battery-powered handheld vacuum device as recited in claim 10, wherein the redirection device has a plate-shaped base on which the at least two redirection regions are provided.

13. The battery-powered handheld vacuum device as recited in claim 12, wherein a predefined plurality of redirection regions which are set apart from each other are provided, the redirection regions being provided in the peripheral region of the plate-shaped base.

14. The battery-powered handheld vacuum device as recited in claim 3, wherein:

the dust collection box has an air intake opening;

an air discharge opening is provided on the motor housing; and

the motor housing and the dust collection box are configured to route an air flow, aspirated into the dust collection box through the air intake opening, to the air discharge opening in at least regionally approximately Z-shaped form.

15. The battery-powered handheld vacuum device as recited in claim 14, wherein the dust collection box has an at least approximately triangular cross-section in the transverse direction with three box corners, a first box corner facing the drive motor, an air intake opening being provided on a second box corner, and an air guidance element being provided in the region between the second box corner and a third box corner, the air guidance element being configured to route the air flow, aspirated into the dust collection box through the air intake opening, in the direction of the third box corner.

16. The battery-powered handheld vacuum device as recited in claim 15, wherein a dust collection space, which is delimited by the air guidance element, is formed in the region between the first box corner and second box corner.

17. The battery-powered handheld vacuum device as recited in claim 15, wherein at least one air redirection element is provided in the region of the third box corner, the at least one air redirection element being configured to redirect the aspirated air flow, routed along the air guidance element, in the direction of the first box corner.

18. The battery-powered handheld vacuum device as recited in claim 15, wherein the dust collection box has an opening for the filter medium in the region between the first box corner and third box corner, the filter medium being situated in the opening.

19. The battery-powered handheld vacuum device as recited in claim 18, wherein the filter medium extends at least approximately perpendicularly to the air guidance element.

20. The battery-powered handheld vacuum device as recited in claim 3, wherein:

the dust collection box and the motor housing together form a vacuum device housing which has an at least approximately triangular cross-section in the transverse direction;

the drive motor is situated in the region between the dust collection box and a first corner of the triangular cross-section of the vacuum device housing;

an air intake opening of the dust collection box is situated in a second corner of the triangular cross-section of the vacuum device housing; and

the battery pack is disposed in the region of a third corner of the triangular cross-section of the vacuum device housing.

21. The battery-powered handheld vacuum device as recited in claim 20, wherein the handle is formed between the second corner and the third corner of the triangular cross-section of the vacuum device housing.

22. The battery-powered handheld vacuum device as recited in claim 20, wherein an operating element for selectively turning the drive motor on and off is situated on a side of the handle which faces away from the drive motor.

23. A system, comprising:

a battery-powered handheld vacuum device for use on building sites, the battery-powered handheld vacuum device including;

a dust collection box;

a motor housing;

a drive motor having a fan impeller; and

a battery pack for supplying the drive motor with current independently of an electrical network;

wherein the drive motor and the battery pack are provided in the motor housing, and wherein the dust collection box is fixed in place on the motor housing in releasable manner, and wherein a handle, with which the battery pack engages at least regionally in reversible manner, is formed on the motor housing, and wherein an air opening is formed on the motor housing, the dust collection box being fixed in place on the air opening in a releasable manner; and

a tool carrying case having a receiving space, wherein the battery-powered handheld vacuum device is configured to be transported in the receiving space of the tool carrying case.

24. The system as recited in claim 23, wherein the battery-powered handheld vacuum device occupies less than two thirds of the receiving space of the tool carrying case.

25. The system as recited in claim 23, wherein the battery-powered handheld vacuum device has at least one outer extension parallel to a main extension plane of the battery-powered handheld vacuum device, the at least one outer extension being less than 250 mm.

26. The system as recited in claim 23, further comprising:

a handheld machine tool;

wherein the handheld machine tool and the battery-powered handheld vacuum device are configured to be jointly transported in the receiving space of the tool carrying case.

27. The system as recited in claim 23, further comprising:

a battery pack;

wherein the battery pack and the battery-powered handheld vacuum device are configured to be jointly transported in the receiving space of the tool carrying case.