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A grinding electric tool

A power tool and grinding technology, applied in the direction of grinding drive devices, manufacturing tools, grinding machine parts, etc., can solve the problems of angle grinders not running normally, bearing damage, gear wear aggravating, etc.

Active Publication Date: 2019-08-20
JIANGSU DONGCHENG TOOLS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual work of the angle grinder, as the temperature of the gear box rises, the lubricating oil in the gear box will thermally expand, and the internal air pressure will be higher than the external air pressure, and the lubricating oil will overflow. Due to the current sealing structure used in the gear box, The lubricating oil can only overflow from the bearing gap in the gearbox, so that the grease inside the bearing is mixed with the lubricating oil in the gearbox, thus accelerating the damage of the bearing. The damage of the bearing directly causes the gear wear to increase, and finally causes the angle grinder to malfunction. run

Method used

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  • A grinding electric tool
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no. 1 approach

[0031] Such as Figure 1 to Figure 3 Shown is a grinding electric tool according to the first embodiment of the present invention. The grinding electric tool 100 includes a housing 1 extending in the longitudinal direction. The housing 1 defines front and rear ends, Such as figure 1 As shown, the left side is the front end, and the right side is the rear end. In the housing 1, a motor 2 is also arranged along the longitudinal direction, connected to the head shell 3 at the front end of the housing 1, and an output mechanism installed inside the head shell 3. The output mechanism is driven to rotate together with the motor 2. The output mechanism It includes an output shaft 15 and a large gear 14 sleeved on the output shaft 15, and the large gear 14 has a locking groove 4, and a locking mechanism is installed on the head shell 3, and the locking mechanism can be used with the large gear 14. Buckling or separation movement, the locking mechanism includes an operating part 5, a...

no. 2 approach

[0035] Such as figure 1 , Figure 4 and Figure 5 Shown is a grinding electric tool related to the second embodiment of the present invention, in this embodiment, the same reference numerals will be used to denote figure 1 , Figure 4 , Figure 5 the same or similar elements shown in , and their detailed descriptions are omitted.

[0036] In the second embodiment, in particular, the second locking pin 9 is provided with a ventilation groove that cooperates with the through hole in the first locking pin 8 to form a ventilation channel, and the ventilation groove is set as a milled flat groove 9b ; The bottom of the operating part 5 is provided with a stepped surface 5a, which cooperates with the groove 9b to form a ventilation channel.

[0037] see figure 1 , Figure 4 and Figure 5 As shown, the motor 2 provides power, and finally transmits the power to the output shaft 15 through the meshing transmission of the pinion gear 13 and the bull gear 14. During the process o...

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Abstract

The invention discloses a grinding type electric tool. The grinding type electric tool comprises a shell (1), a motor (2), a head shell (3), an output mechanism and a locking mechanism; the output mechanism is arranged in the head shell (3) and is provided with a locking groove (4); the locking mechanism is embedded in the head shell (3) and comprises an operating part (5), a locking pin protruding corresponding to the locking groove (4) and an elastic element (6) located on the outer side of the locking pin, wherein one end of the elastic element (6) is supported on the head shell (3), and the other end of the elastic element (6) abuts against the operating part; and the locking pin is provided with a through hole allowing an inner cavity of the head shell (3) to be ventilated with the outside and a filling material (7) arranged in the through hole and having the air permeability. According to the grinding type electric tool, by the adoption of the structure, the phenomena that lubricating oil overflows from a bearing gap due to the increase of temperature in the head shell in the machine operation process, and grease in a bearing is completely mixed with the lubricating oil in a gearbox can be avoided, and therefore the service life of the bearing, a gear and the whole machine can be prolonged.

Description

[0001] [technical field] [0002] The invention relates to a grinding electric tool, in particular to a gear box structure of the grinding electric tool. [0003] [Background technique] [0004] At present, the common angle grinder is powered by a motor. By converting the speed and torque of the motor into the rated output speed and torque of the whole machine, in order to prolong the service life of the gear in this transmission process, it is necessary to ensure the gear transmission. For effective lubrication, the usual method is to inject lubricating oil into the gearbox, but because the lubricating oil has a certain flowability, in order to prevent the lubricating oil from leaking from the gap of the gearbox, the gearbox must have reliable sealing. [0005] Please refer to the Chinese utility model patent announcement No. CN202053121U patent announced on November 30, 2011, which discloses an angle grinder. The head shell of the angle grinder is provided with an inner groov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B23/02B24B41/00B24B41/04B24B55/00B24B47/12
Inventor 侯维平
Owner JIANGSU DONGCHENG TOOLS TECH CO LTD