Hammer drill

A technology of percussion drill and percussion frequency, which is applied in the field of percussion drill, and can solve the problems such as non-self-locking of internal static end teeth

Inactive Publication Date: 2010-02-17
POSITEC POWER TOOLS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, when the working head of the impact drill is working, because the inner static end teeth do not have a radial anti-rotation mechanism, the inner static end teeth may not self-lock during operation, and the movable end teeth will drive the inner static end in reverse. The phenomenon that the end teeth reverse and then drive the large bevel gear, small bevel gear, handle and other parts to reverse

Method used

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no. 1 approach

[0059] The first embodiment disclosed in the present invention is:

[0060] Reference Figure 1 to Figure 4 , An impact drill comprising: a housing 1, a driving device (not shown in the figure) accommodated in the housing 1, a rotary output shaft 3 rotatably driven by the driving device, a switch 5 for adjusting the impact frequency, a switch A sleeve 6 is provided thereon, and a spring 9 connected to the bearing 7 of the output shaft 3 is connected to the first set of impact components A and the second set of impact components B on the rotating output shaft 3.

[0061] Wherein, the driving device refers to a motor or a motor or the like.

[0062] The first group of impact components A includes: a first static end tooth 11 fixed relative to the housing 1, and a first movable end tooth 13 fixed to the output shaft 3 and capable of radially moving relative to the housing 1.

[0063] Wherein, the first static end tooth 11 and the end cover 15 fixed to the housing 1 are in an interference...

Embodiment approach

[0085] The second embodiment disclosed in the present invention is:

[0086] Reference Figure 1 to Figure 4 , An impact drill includes: a housing 1', a drive device (not shown in the figure), such as a motor or a motor, and a rotary output shaft 3'that is rotatably driven by the drive device. The switch 5'for adjusting the impact frequency, the spring 9'connected to the bearing 7'of the output shaft 3', the first group of impact components A'and the second group of impact components B arranged on the rotating output shaft 3'in parallel '. The two sets of impact components are in an inner and outer sleeve connection.

[0087] Among them, the first group of impact components A'includes: a first static end tooth 11' fixed relatively to the housing 1', fixed to the output shaft 3'and capable of radial movement relative to the housing 1'. End teeth 13'.

[0088] There is an interference fit between the first static end tooth 11' and the end cap 15' fixed to the housing 1', so the firs...

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PUM

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Abstract

The invention relates to a hammer drill, which comprises a shell, a driving device arranged in the shell, a rotary output shaft driven by the driving device, a first impact component, a second impactcomponent and a switch for controlling impact frequency, wherein the first impact component and the second impact component are used for transmitting the specific impact frequency to the output shaft;the first impact component comprises a first static end gear and a first dynamic end gear which can impact and meshed; and the second impact component comprises a second static end gear and a seconddynamic end gear which can impact and meshed. The dynamic end and static end gears of the hammer drill can generate excellent contact while being meshed; and the static end gears have a self-locking function.

Description

Technical field [0001] The invention relates to a percussion drill capable of appropriately adjusting the impact frequency according to work needs. Background technique [0002] US Patent No. 3,34,468, its specification discloses a percussion drill with two impact frequencies. [0003] The impact drill includes a housing in which a driving device, such as a motor or a motor, rotates an output shaft, an impact component for transmitting a specific impact frequency to the output shaft, a switch for adjusting the impact frequency, The impact assembly includes movable end teeth, and inner and outer static end teeth arranged in parallel on the rotating output shaft. [0004] Under different working conditions, the inner and outer static end teeth are selectively meshed with the dynamic end teeth to produce different operating frequencies. [0005] However, the dual-frequency conversion mechanism of the impact drill has some drawbacks. First, the internal and external static end teeth are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B45/16B25D16/00
Inventor 钟红风
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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