Power tool
A power tool and rotary power technology, applied in the field of gun drill power tools, can solve the problems of high cost, shortened motor life, damage, etc., and achieve the effect of simple structure, high reliability and cost reduction
Active Publication Date: 2015-02-04
POSITEC POWER TOOLS (SUZHOU) CO LTD
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- Abstract
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- Application Information
AI Technical Summary
Problems solved by technology
On the one hand, the frequent short-term start-up of the motor is likely to shorten the life of the motor or damage it; on the other hand, the linkage between the multi-cutter drum and the switch requires precise positioning control, and the cost is high
Method used
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Embodiment approach
[0077] In the above embodiments, whether the torque transmission part is hexagonal or twelve-pointed star-shaped, the hexagonal shape of the working head 9 and the torque transmission part of the output shaft 4 need to correspond completely, and if there is a slight deviation, the working head 9 Can not enter the output shaft 4 smoothly. To solve this problem, Figure 14 to Figure 19 Given the third embodiment of the present invention, the torque transmission part only takes an odd or even number of twelve radial protrusions, so that the torque transmission part has six radial protrusions, and every two radial protrusions There is a circular arc transition between the protrusions 42, and the pressing member 465 is arranged at a position aligned with the axially extending part of one of the radial protrusions, referring to Figure 17 , when the hexagonal shape of the working head 9 is staggered from the torque transmission part, the working head 9 is blocked by the pressing pi...
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The utility model relates to a power tool which comprises a main case, a motor, an output shaft, a transmission mechanism, a work head support mechanism and a connecting shaft, wherein the motor is arranged in the main case and outputs rotary power; the output shaft is provided with a containing hole arranged in the axial direction and used for containing a work head; the transmission mechanism is arranged between the motor and the output shaft and can transmit the rotary power output by the motor to the output shaft; the work head support mechanism is arranged in the main case and is provided with a plurality of containing spaces arranged in parallel which are used for supporting the work head; the connecting shaft is arranged in the main case and can move between two positions to drive the working position of the work head in the containing hole or the containing position of the work head in the work head support mechanism; and the connecting shaft is provided with a working end used for connecting with the work head in a matching mode and a support end opposite to the working end. The power tool further comprises a support component which are used for abutting against the support end in the axial direction at least when the work head is at the working position. Point contact exists between the work head and the working end or between the support component and the support end.
Description
technical field [0001] The invention relates to a power tool, in particular to a gun drill type power tool which can realize the storage and quick replacement of working heads. Background technique [0002] Existing gun drill power tools generally include electric drills, electric screwdrivers and impact drills. [0003] An electric screwdriver is a commonly used electric tool for tightening screws to workpieces. When screws with different specifications need to be tightened during use, different working heads, that is, batch heads, should be replaced according to different screw specifications, that is, the originally installed working head should be removed, and then a working head with another structure should be installed. . In the occasions where the working head needs to be replaced frequently, it brings great inconvenience to the operator. On the one hand, it is cumbersome to replace the working head, and on the other hand, the removed working head is easily lost wh...
Claims
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IPC IPC(8): B25F5/00B25B21/00
CPCB23B45/02B25B21/00B25B23/00B25D16/00B25F3/00B25F5/00B25F5/001B25F5/003
Inventor 张士松庞晓丽钟红风
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD