Tool having a Controllable Cooling Means

• US 20160039081A1
• Filed: 08/05/2015
• Published: 02/11/2016
• Est. Priority Date: 08/05/2014
• Status: Active Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Scharfenberg, Andreas, Ruhs, Eberhard
• Application Number:
  US14/818,423
• Publication Number:
  US 20160039081A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B25F 5/008 Cooling means

Abstract

An electrically operated tool appliance comprises a rotatable tool head, an electric motor drive configured to drive the rotatable tool head, a control system configured to control the electric motor drive, an energy supply configured to supply the electric motor drive with electrical energy, and a first cooling mechanism configured to cool the electric motor drive and/or the control system. The first cooling mechanism defines a cooling capacity configured to be controlled independently of a rotational speed of the electric motor drive.

Claims

1. An electrically operated tool appliance, comprising:

a rotatable tool head;

an electric motor drive configured to drive the rotatable tool head;

a control system configured to control the electric motor drive;

an energy supply configured to supply the electric motor drive with electrical energy; and

a first cooling mechanism configured to cool the electric motor drive and/or the control system, the first cooling mechanism defining a cooling capacity configured to be controlled independently of a rotational speed of the electric motor drive.

2. The tool appliance according to claim 1, further comprising:

a ventilation mechanism of the first cooling mechanism configured to generate an air flow through at least one region of the tool appliance.

3. The tool appliance according to claim 2, the first cooling mechanism further comprising:

air inlet openings for cooling air;

air outlet openings for cooling air; and

at least one flow channel for cooling air fluidly connecting the air inlet openings and the air outlet openings.

4. The tool appliance according to claim 3, wherein the flow channel is configured to enable cooling air to cool the electric motor drive and to cool the control system.

5. The tool appliance according to claim 3, wherein the flow channel is configured to enable cooling air to cool the energy supply.

6. The tool appliance according to claim 1, further comprising:

a second cooling mechanism configured to cool at least the electric motor drive.

7. The tool appliance according to claim 6, further comprising:

a drive shaft of the electric motor drive; and

a cooling element of the second cooling mechanism operatively coupled to the drive shaft.

8. The tool appliance according to claim 1, wherein the tool appliance is configured as a screwdriver or a blind-rivet setting devices.

9. The tool appliance according to claim 1, further comprising:

a further control system configured to control the cooling capacity of the first cooling mechanism in dependence on at least one operating parameter of the tool appliance.

10. The tool appliance according to claim 9, wherein the at least one operating parameter is at least one of a temperature of the electric motor drive, a temperature of the control system, an output power of the electric motor drive, a temperature of the energy supply, a rotational speed of the electric motor drive, a rotational speed of a drive shaft of the electric motor drive, and a motor power of the electric motor drive.