CN201271878Y

CN201271878Y - Improved electric hammer

Info

Publication number: CN201271878Y
Application number: CNU2008201350680U
Authority: CN
Inventors: 吴来广
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-28
Filing date: 2008-08-28
Publication date: 2009-07-15
Anticipated expiration: 2018-08-28

Abstract

The utility model discloses an improved electric hammer, which comprises a crankshaft chamber, a rotary cylinder chamber and a speed reduction gear chamber, wherein, a throttling valve plate separating the crankshaft chamber from the rotary cylinder chamber is arranged in the separating position of the crankshaft chamber and the rotary cylinder chamber, and a sealing ring for sealing the part between the crankshaft chamber and the rotary cylinder chamber is arranged on the case walls, through which a crankshaft passes, of the crankshaft chamber and the rotary cylinder chamber. Because of the throttling valve plate and the sealing ring, the lubricant in the crankshaft chamber can be prevented from running out to the rotary cylinder chamber and the speed reduction gear chamber; the lubricant can be stored in the relatively sealed space for a long time and is not leaked and run out, to ensure parts, such as a crankshaft, a connecting rod, a piston and the like to be fully lubricated, thereby the long-term and stable operation of the electric hammer is ensured.

Description

A kind of improved electric hammer

Technical field:

The utility model relates to the electric tool technical field, especially relates to the electric hammer in the electric tool.

Background technology:

At present common a kind of electric hammer partly is made up of motor, reduction gear, gas pressure mechanism, slew gear, hammer mechanism and main handle, auxilliary handle, startup button, casing etc.Wherein, the gas pressure mechanism that promotes impact piston generation bump is made of parts such as bent axle, connecting rod, displacers again, and the space at gas pressure mechanism place is referred to as crankshaft room.Crankshaft room and rotary cylinder chamber with rotary cylinder after spring bearing (abbreviating rear bearing as) be boundary.Because between rear bearing outer surface and the cabinet wall, there is big cavity in the part, so be connected between crankshaft room and the cylinder spin chamber.Crankshaft room and reduction gearing chamber are boundary with the tank wall then, and a through hole that bent axle is passed is arranged on the tank wall, and bigger space is arranged between bent axle and the tank wall, and crankshaft room communicates with the reduction gearing chamber by bearing space etc. again.Crankshaft room top also has a capping that is used for part such as built-up crankshaft and filling lubricant.Since electric hammer when work displacer and rotary cylinder parts between can produce strong friction, for preventing sharp wear to take place between these parts and produce high temperature, be filled with the lubricant that parts such as bent axle, connecting rod, piston are lubricated in the crankshaft room.But, because blow-by between crankshaft room and reduction gearing chamber, the cylinder spin chamber, particularly have bigger cavity to communicate between crankshaft room and the cylinder spin chamber, during electric hammer work, lubricant can be along these spaces or the cavity flow to cylinder spin chamber and reduction gearing chamber gradually.Like this, lubricant in the crankshaft room can be fewer and feweri, even flow to end fully, weaken or lose lubrication parts such as bent axle, connecting rod, displacers, these parts moving surfaces will produce huge friction and wear, and finally cause piston to be killed adhering to and can't move with cylinder, perhaps displacer and rotary cylinder gap increase gradually, sealing between displacer and rotary cylinder is destroyed, lose the ability of calming the anger, can not produce enough air pressure and drive impact piston, electric hammer can't be worked or cisco unity malfunction.

The utility model content:

The purpose of this utility model provides a kind of improved electric hammer with regard to being the weak point that exists at prior art, lubricant in its crankshaft room can keep and bring into play lubricated to crankshaft room's parts such as displacers for a long time, can not flow to the rotary cylinder chamber and the reduction gearing chamber on next door.

For achieving the above object, the utility model includes crankshaft room, rotary cylinder chamber, reduction gearing chamber, wherein: the interface place of crankshaft room and rotary cylinder chamber is provided with the throttling sheet that both are kept apart, in the crankshaft room and reduction gearing chamber wall that bent axle passes through, then be provided with the sealing ring that seals between crankshaft room and the reduction gearing chamber.

Described sealing ring is a rubber seal.

Has gap between the die cavity of described throttling sheet and external stability housing for crankshaft room's air inlet and exhaust.

The beneficial effects of the utility model are: owing to be provided with throttling sheet and sealing ring, can prevent that lubricant in the crankshaft room is to the loss in spaces such as cylinder spin chamber and reduction gearing chamber; Lubricant can long-term existence not revealed loss in relative sealed space, it is lubricated fully that parts such as bent axle, connecting rod, piston can be obtained, and guarantees the long-term stable operation of electric hammer.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is described further:

Accompanying drawing 1 is an overall structure schematic diagram of the present utility model;

Accompanying drawing 2 is that A-A in the accompanying drawing 1 is to cutaway view;

Accompanying drawing 3 is the structural representation of throttling sheet;

Accompanying drawing 4 is the structural representation of sealing ring.

The specific embodiment:

The following stated only is preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model.

See that accompanying drawing 1 is to shown in the accompanying drawing 4: the utility model includes crankshaft room 10, rotary cylinder chamber 20, reduction gearing chamber 30 etc., wherein, the interface place of crankshaft room 10 and rotary cylinder chamber 20 is provided with the throttling sheet 40 that both are kept apart, throttling sheet 40 is positioned at bearing one end that crankshaft room 10 and cylinder spin chamber 20 are kept apart, its outline is identical or basic identical with the shape of die cavity inwall, and cylinder passes from the circular hole at throttling sheet 40 middle parts.In the crankshaft room 10 and reduction gearing chamber 30 tank walls that bent axle passes through, then be provided with the sealing ring 50 that seals between crankshaft room 10 and the reduction gearing chamber 30, sealing ring 50 preferably adopts rubber seal.

In addition, for, having gap 41 between the die cavity of throttling sheet 40 and external stability housing for crankshaft room's 10 air inlets and exhaust, the size in gap 41 should be able to stop the lubricant of crankshaft room 10 to pass through, but can allow the gas of crankshaft room 10 enter or discharge.

Claims

1. improved electric hammer, it includes crankshaft room (10), rotary cylinder chamber (20), reduction gearing chamber (30), it is characterized in that: the interface place of crankshaft room (10) and rotary cylinder chamber (20) is provided with the throttling sheet (40) that both are kept apart, in the crankshaft room (10) and reduction gearing chamber (30) tank wall that bent axle passes through, then be provided with the sealing ring (50) that seals between crankshaft room (10) and reduction gearing chamber (30).

2. improved electric hammer according to claim 1 is characterized in that: described sealing ring (50) is a rubber seal.

3. electric hammer according to claim 1 and 2 is characterized in that: have the gap (41) for crankshaft room's (10) air inlet and exhaust between the die cavity of described throttling sheet (40) and external stability housing.