Centering element
A technology of centering elements and fasteners, applied in the field of centering elements of multi-function machines, can solve the problems of slippage and easy wear of the working head, and achieve the effects of favorable separation, reduced wear and increased cost
Active Publication Date: 2015-07-01
POSITEC POWER TOOLS (SUZHOU) CO LTD
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Problems solved by technology
[0004] However, the deficiency of the above-mentioned multifunctional machine is: the star-shaped opening of the working head matches the shape of the protrusion on the output shaft, and the protrusion on the output shaft not only needs to play a centering function, but also needs to play a fixing function and transmit torque function of
Therefore, both the protrusion on the output shaft and the star-shaped opening of the working head are subject to wear, causing the working head to slip
Method used
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Embodiment Construction
[0059] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0060] figure 1 Shown is the head area of the multifunction machine 200 in the first embodiment of the present invention. The multifunctional machine 200 includes a casing 30 , a motor (not shown) installed in the casing 30 , an output shaft 32 driven by the motor, and a working head 34 installed below the output shaft 32 . A fastener 36 passes through the working head 34 and is connected to the end of the output shaft 32 , so that the working head 34 is fixed on the output shaft 32 and can move under the drive of the output shaft 32 .
[0061] see figure 1 with figure 2 As shown, the output shaft 32 is disposed longitudinally inside the housing 30 , and its end extends out of the housing 32 for a certain distance. A shift fork 38 is installed on the output shaft 32. When the motor rotates, it can drive an eccentric device (not shown) to...
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The invention provides a centering element of a multifunctional machine. The multifunctional machine comprises an output shaft and a fastening piece, wherein the output shaft drives a working head to rotate and swing, the fastening piece is used for mounting the working head on the output shaft; the working head is provided with a mounting part which can be connected to the output shaft; a driving part which is in assembled connection with the working head is arranged at the rear end of the output shaft; and the driving part is provided with a concave matched with the centering element. The centering element comprises a first surface and a second surface opposite to the first surface, wherein a shaping matching part which axially extends and is matched with the mounting part is arranged on the second surface; and because the largest distance between the first surface and the second surface is not more than the axial depth of the concave, when the centering element is assembled in the concave, the contact between a friction surface on the output shaft and the upper surface of the mounting part on the working head is not blocked. The centering function is beneficially separated from the fixing function and / or transition torque; and the abrasion of the centering element is reduced.
Description
technical field [0001] The invention relates to a centering element, in particular to a centering element for a multifunctional machine. Background technique [0002] The multi-function machine is a common hand-held oscillating power tool in the industry. Its working principle is that the output shaft rotates and oscillates around its own axis, thereby driving the accessory working head installed at the end of the output shaft to oscillate. Common attachment heads include straight saw blades, circular saw blades, triangular sanding discs, and shovel scrapers, among others. Therefore, when the user installs different accessory working heads on the output shaft, it can realize a variety of different operating functions, such as sawing, cutting, grinding, scraping, etc., to meet different working needs. [0003] The traditional multifunctional machine is provided with a form fitting mechanism for torque transmission between the working head and the output shaft. For example, ...
Claims
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IPC IPC(8): B25F3/00
Inventor 沃伦·布朗哈利·索默格雷厄姆·格哈德
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD