CN201295918Y

CN201295918Y - Electric tool

Info

Publication number: CN201295918Y
Application number: CNU2008201863291U
Authority: CN
Inventors: 山冈敏成
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2008-10-22
Filing date: 2008-10-22
Publication date: 2009-08-26
Anticipated expiration: 2018-10-22

Abstract

The utility model relates to an electric tool which comprises a switch, a motor, a shell, a gear cabinet and a transmission device comprising impact blocks, wherein a main shaft of the transmission device is provided with at least one through hole communicated with the interior and the exterior of the gear cabinet. The electric tool can effectively release the internal pressure of the gear cabinet caused by impact so as to overcome the defect of oil leakage.

Description

Electric tool

Technical field

The utility model relates to a kind of electric tool, especially a kind of electric tool with gear cabinet.

Background technology

In decoration, finishing field, the electric tool with gear cabinet is comparatively commonly used.With the ailing machine is example, and the continuous strike type ailing machine with gear cabinet has the great efforts of impacting, and is not prone to situations such as nail is bended or stuck.

The gear cabinet of the ailing machine of strike type is generally a comparatively airtight space continuously.When ailing machine was worked, the main shaft in the gear cabinet drove the impact block rotation, produced and impacted.Impact producing high temperature, the grease of gear cabinet inside is partly vaporized, air themperature raises simultaneously.

This moment, gear cabinet inside pressure raise, because the gear cabinet is comparatively airtight space, pressure can't discharge, and with the grease in the gear cabinet is outwards oozed out from the fit clearance of each part, causes leakage of oil.

Summary of the invention

In order to overcome deficiency of the prior art and defective, the utility model provides the electric tool after a kind of the improvement.

For reaching above purpose, the electric tool that the utility model discloses comprises a switch, a motor, one casing, a gear cabinet, one comprises the transmission device of impact block, the main shaft of described transmission device has at least one through hole, this through hole is communicated with the gear cabinet inside with outside, and this through hole is L shaped, has 2 openings at least, one opening is positioned at spindle nose, be communicated with gear cabinet outside, an opening is positioned at the main shaft surface, is communicated with the gear cabinet inside.

Electric tool with above structure can effectively discharge the gear cabinet inside pressure that causes because of impact, thereby alleviates the leakage of oil defective.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the schematic perspective view of a kind of preferred embodiment of the present utility model.

Fig. 2 is the cutaway view that ailing machine shown in Figure 1 is done along the parting surface of two halves casing, and wherein, power brick is removed.

Fig. 3 is the transmission device schematic perspective view of ailing machine shown in Figure 1.

Fig. 4 is the gear cabinet partial sectional view of ailing machine shown in Figure 1.

Specific embodiments

In the present embodiment, be example with the ailing machine.As depicted in figs. 1 and 2, ailing machine 1 comprises and holds motor 2 at interior casing 3 and rifle mouth portion 4, rifle mouth portion 4 and casing 3 approximate vertical.In the present embodiment, ailing machine 1 also comprises a power brick 5, be used for to motor 2 power supply, but the power supply mode of the ailing machine that the utility model disclosed is not limited thereto, and it can also use AC-powered.Switch 6 is installed on the casing 3, is used to control the start and stop of motor 2.Rifle mouth portion 4 comprises a push rod 17 that can promote nail 7, and push rod 17 is installed in the rifle mouth portion 4 by spring 22, and can do straight reciprocating motion therein, in when operation, and push rod 17 end-acted in the head of nail 7.Rifle mouth portion 4 also comprises a muzzle 23.

To shown in Figure 4, also comprise mechanical driving device as Fig. 2 in the casing 3, this transmission device can transmit rotatablely moving of motor 2 and be the ballistic motion of push rod 17.Motor 2 is installed in the casing 3 vertically, and motor shaft 18 is connected with the input of transmission device, and the clutch end of transmission device cooperates with push rod 17.Motor 2 passes to main shaft 8 by the multi-stage gear transmission with rotary power.Main shaft 8 is vertical mutually with motor shaft 18, and main shaft 8 is provided with two pairs of skewed slots 9.One impulse member 10 is enclosed within on the main shaft 8, and impulse member 10 is roughly the cylinder of a hollow, and its inner cylinder face is provided with a pair of guide groove 21 relative with skewed slot 9 positions.A pair of steel ball 12 is between skewed slot 9 and guide groove 21, so can drive impulse members 10 rotations by the steel ball 12 that is positioned at its skewed slot 9 when main shaft 8 rotates.A spring 13 is loaded between impulse member 10 and the main shaft 8, and the one end withstands on the step 11 of main shaft 8, and the other end withstands on the impulse member 10.When main shaft 8 rotates, the end face of projection 14 bump push rods 17, push rod 17 is at the impact force action lower compression spring 22 of impulse member 10 and clash into nail, thereby forms one-shot.

Main shaft 8 is driven by the gear 15 that motor shaft 18 drives indirectly, and bearing 16 is positioned at the end of main shaft.Gear cabinet 19 has a perforate 24, to expose the end of main shaft 8.Through hole 20 is positioned on the main shaft 8, and in the present embodiment, through hole 20 sections are L shaped.Through hole 20 has the first opening 20a and the second opening 20b.The first opening 20a is positioned at the surface of main shaft 8, is communicated with gear cabinet 19 inside.The second opening 20b is positioned at the end of main shaft 8, is communicated with gear cabinet 19 outsides.

When ailing machine was worked, motor 2 drive transmission working at high speed also drove impulse member 10 generation impacts.Impacting the high temperature that produces partly vaporizes internal grease.Simultaneous temperature raises, and causes gear cabinet 19 internal pressures to raise.Gear cabinet 19 internal high pressure air are discharged from through hole 20 by the diagram direction of arrow, effectively reduce internal pressure, thereby alleviate the possibility of leakage of oil.

When the grease because of high-temperature evaporation enters the first opening 20a of through hole 20, may be because of on the wall that freezes attached to the first opening 20a.But main shaft 8 is in the state of running up, and the centrifugal force of generation can throw away the grease that adheres to from the first opening 20a, thereby avoids through hole 20 to lose the effect of release pressure because of obstruction.

Those of ordinary skill in the art can also recognize that through hole 20 sections also can be arc, or other can be communicated with the inside and outside shape of gear cabinet 19.The opening on main shaft 8 surfaces also can be a plurality of, with better exhaust decompression.The electric tool that the utility model discloses is not limited to described content of above embodiment and the represented structure of accompanying drawing.On basis of the present utility model to the shape of member wherein and the change apparently that makes the position, substitute or revise, all within the claimed scope of the utility model.

Claims

1. an electric tool comprises a switch, a motor, and a casing, a gear cabinet, one comprises the transmission device of impact block, it is characterized in that, and the main shaft of described transmission device has at least one through hole, and this through hole is communicated with the gear cabinet inside with outside.

2. electric tool as claimed in claim 1 is characterized in that: this through hole has 2 openings at least, and an opening is positioned at spindle nose, is communicated with gear cabinet outside, and an opening is positioned at the main shaft surface, is communicated with the gear cabinet inside.

3. electric tool as claimed in claim 2 is characterized in that: this through hole is L shaped.