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Pneumatic spring percussion mechanism with an electro-dynamically actuated driving piston

An air spring, driving piston technology, applied in the field of air spring impact hammer, can solve problems such as damage to the durability of the impact piston

Inactive Publication Date: 2007-02-28
WACKER NEUSON SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hammers of this type are, however, subjected to high thermal loads in practice, since the impact piston is not only heated by the impact energy released during the impact, but is also simultaneously magnetized by eddy currents, which in many cases even leads to an impairment of the durability of the impact piston

Method used

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  • Pneumatic spring percussion mechanism with an electro-dynamically actuated driving piston
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  • Pneumatic spring percussion mechanism with an electro-dynamically actuated driving piston

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Embodiment Construction

[0027] FIG. 1 shows an electric tube hammer with a hammer tube 1 belonging to a hammer housing, a drive piston 2 reciprocating axially in the hammer tube and a drive piston 2 also in the hammer tube 1 along the An impact piston 3 that reciprocates axially. The drive piston 2 and the percussion piston 3 have substantially the same diameter. A hollow space 4 is formed between drive piston 2 and percussion piston 3 , in which a gas spring 5 is accommodated. The guidance of the longitudinally extending percussion piston 3 is additionally supported by a guide 6 arranged in the hammer housing.

[0028] The three driving coils 7 arranged around the impact hammer tube 1 are powered on sequentially through a controller (not shown), so that the coils accelerate the driving piston 2 and perform reciprocating motion.

[0029] The movement of the driving piston 2 through the air spring 5 is transmitted to the percussion piston 3, and the percussion piston 3 is driven against the hammer h...

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Abstract

The invention relates to a pneumatic spring percussion mechanism comprising a driving piston (2) moving back and forth in a housing (1) of the percussion mechanism (2) and a percussion piston (3), wherein a pneumatic spring (5) is configured between the driving piston (2) and the percussion piston (3). The movement of the driving piston (2) can be transmitted to the percussion piston (3) by means of said pneumatic spring. The driving piston (2) can be driven by an electric linear motor and is connected to an armature (9) of the linear motor, forming a single piece therewith. This arrangement makes it possible to eliminate the use of a conventional rotatory motor and a crank mechanism to drive the driving piston (2).

Description

technical field [0001] The invention relates to an air spring impact hammer. Background technique [0002] Air spring hammers have long been used in particular as drilling hammers and / or percussion hammers. Common to the various types of air spring hammers is the axial reciprocation of the drive piston through the transmission of an electrically driven crankshaft. In front of the drive piston is a coaxial percussion piston, which is arranged such that at least one hollow space isolated from the environment is formed between the drive piston and percussion piston by means of the housing of the percussion hammer. The air volume enclosed in this hollow space acts as an air spring during the movement of the drive piston and transmits the movement of the drive piston to the impact piston which, with a time delay after the movement of the drive piston, strikes the tool On the handle or on the hammer head inserted in the middle. [0003] Air spring hammers generally fall into th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25D11/06B25D13/00
CPCB25D11/064B25D2250/375
Inventor M·斯太芬R·比尔格W·斯米德
Owner WACKER NEUSON SE