CN203438195U

CN203438195U - Improved electric hammer

Info

Publication number: CN203438195U
Application number: CN201320484247.6U
Authority: CN
Inventors: 曾细杰
Original assignee: FUJIAN HUIAN JIANGU ELECTRICAL MACHINERY Co Ltd
Current assignee: FUJIAN HUIAN JIANGU ELECTRICAL MACHINERY Co Ltd
Priority date: 2013-08-08
Filing date: 2013-08-08
Publication date: 2014-02-19
Anticipated expiration: 2023-08-08

Abstract

The utility model discloses an improved electric hammer which comprises a casing, a handle, a cylinder, a piston, a ram, bearings, an impact rod and a bit. The cylinder is arranged in the casing. The piston and the ram are arranged in the cylinder. One end of the impact rod is connected with the ram, and the other end extends out of the cylinder and is connected with one end of the bit. The other end of the bit extends out of the head of the casing. The bearings are respectively fixedly sleeved on front and back ends of the cylinder. Two bearings are respectively movably arranged on the casing. An elastic clasp is fixedly sleeved on the part, which contacts the bearing, on the outer side wall of the front end of the cylinder. The outer side wall of the elastic clasp is close to and matched with the inner side wall of the bearing. The improved electric hammer provided by the utility model has the advantages that through the elastic clasp, the cylinder and the bearing are tightly matched; damage caused by relative movement produced by the reaction force of the bit and the vibration of the cylinder is prevented; and the problem that the cylinder moves backward, which is caused by the reaction force of the bit, is eliminated.

Description

A kind of modified electric hammer

Technical field

The utility model belongs to electricity consumption class instrument, specifically refers to a kind of electric hammer.

Background technology

Electric hammer, is the class in electric drill, is mainly used to hole on concrete, floor, brick wall and stone material.Electric hammer operation principle is by driven by motor transmission mechanism, by transmission mechanism band dynamic air cylinder and drill bit, rotated again, transmission mechanism also drives piston reciprocating air in cylinder when driving drill bit to rotate, percussion hammer in cylinder inner air pressure cyclical swing band dynamic air cylinder back and forth hits the impact bar of electric hammer, as us, with hammer, knock brick, therefore named is electric hammer.

Existing electric hammer, it generally comprises casing, handle, cylinder, piston, percussion hammer, bearing, impact bar, motor, transmission mechanism and drill bit, wherein cylinder is placed in casing, piston and percussion hammer are all placed in cylinder, and the rear of piston in percussion hammer, one end of impact bar is connected with percussion hammer, the other end of impact bar stretches out outside cylinder and is connected with one end of drill bit, the other end of drill bit stretches out outside the head of casing, bearing holder (housing, cover) is connected on outside the two ends of cylinder and is movably arranged on casing, and on the madial wall of casing, be concaved with the bearing of installing for bearing groove is installed, motor and transmission mechanism are located in casing, the work of motor drive transmission device, transmission mechanism is with respectively dynamic air cylinder to rotate and piston reciprocates.

Electric hammer of the prior art, because cylinder coordinates with bearing socket, and the contact-making surface between cylinder and bearing is light face, make like this frictional force between cylinder and bearing less, and drill bit is when boring, drill bit has powerful reaction force acts when cylinder, this reaction force can make cylinder (being the opposite direction of drill bit) movement backward, can there is with the crank of transmission mechanism hard collision in the mobile end, rear end of cylinder that makes backward of cylinder, thereby it is damaged to cause cylinder to occur, and then shorten the service life of electric hammer.Therefore, in order to prevent that reaction force because of drill bit from causing cylinder mobile problem backward, manufacturer is positioned at the lateral wall of cylinder the position contacting with bearing and gets on the bus and be provided with the antiskid thread for anti-skidding, by this antiskid thread, increase the frictional force between cylinder and bearing, and then play the cylinder mobile effect backward that prevents.Yet, electric hammer can produce strong vibrations when boring, these vibrations can cause cylinder vibrations, the vibrations of cylinder easily make the antiskid thread of cylinder lateral wall impaired, the skidproof effect of long-term impaired rear antiskid thread lost efficacy, and then caused cylinder still can move backward the problem that hard collision occurs with the crank of transmission mechanism because of the reaction force of drill bit.

In view of this, the inventor conducts in-depth research the structure of electric hammer, and this case produces thus.

Utility model content

The purpose of this utility model is to provide a kind of modified electric hammer, and it overcomes cylinder in prior art and with transmission mechanism, hard collision occurs and cause open defect because the reaction force of drill bit is mobile backward.

The technical solution of the utility model is: a kind of modified electric hammer, comprise casing, handle, cylinder, piston, percussion hammer, bearing, impact bar and drill bit, wherein cylinder is placed in casing, piston and percussion hammer are all placed in cylinder, and the rear of piston in percussion hammer, one end of impact bar is connected with percussion hammer, the other end of impact bar stretches out outside cylinder and is connected with one end of drill bit, the other end of drill bit stretches out outside the head of casing, outside the rear and front end of this cylinder, overlap respectively intrinsic this bearing, two bearings is movably arranged on respectively on casing, on the madial wall of casing, be concaved with for the two bearings bearing that activity is installed respectively groove is installed, the front end lateral wall of above-mentioned cylinder is positioned at the position contacting with above-mentioned bearing and overlaps intrinsic snap ring, and the lateral wall of above-mentioned snap ring and the madial wall of above-mentioned bearing are affixed tight fit.

On the lateral wall of above-mentioned cylinder, be concaved with for above-mentioned snap ring and embed the installation groove of installing, above-mentioned snap ring embeds this and installs in groove, and on the lateral wall of above-mentioned snap ring, convex with the protuberance stretching out outside above-mentioned installation groove notch, the lateral wall of above-mentioned protuberance and the madial wall of above-mentioned bearing are affixed tight fit.

Above-mentioned snap ring is 65 manganese rings.

A kind of modified electric hammer of the present utility model, because being positioned at the position contacting with bearing, the front end lateral wall of cylinder overlaps intrinsic snap ring, and the lateral wall of snap ring and the madial wall of bearing are affixed tight fit, by this snap ring, make to coordinate tight ness rating stronger between cylinder and bearing, can not be subject to the reaction force of drill bit and relatively move and the vibrations of cylinder and occur impaired, eliminate cylinder because of the reaction force of drill bit mobile problem backward, extended service life of electric hammer.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the A portion enlarged drawing of Fig. 1.

In figure:

Casing 1 cylinder 2

Piston 3 percussion hammers 4

Bearing 5 impact bars 6

Drill bit 7 motors 8

Snap ring 9

The specific embodiment

In order further to explain the technical solution of the utility model, below by specific embodiment, the utility model is elaborated.

A kind of modified electric hammer of the utility model, as Fig. 1, shown in 2, comprise casing 1, cylinder 2, piston 3, percussion hammer 4, bearing 5, impact bar 6, drill bit 7, motor 8 and transmission mechanism, wherein cylinder 2 is placed in casing 1, piston 3 and percussion hammer 4 are all placed in cylinder 2, and the rear of piston 3 in percussion hammer 4, one end of impact bar 6 is connected with percussion hammer 4, the other end of impact bar 6 stretches out outside cylinder 2 and is connected with one end of drill bit 7, the other end of drill bit 7 stretches out outside the head of casing, bearing 5 is fixed in outside the rear and front end of cylinder 2, on the madial wall of casing 1, be concaved with for the bearing of two bearing 5 corresponding setting-ins groove is installed, bearing 5 activities are embedded in this bearing is installed groove, motor 8 and transmission mechanism are located at respectively in casing 1, motor 8 is controlled transmission mechanism and is started working, transmission mechanism band dynamic air cylinder 2 rotates reciprocating with piston 3, the structure of this transmission mechanism is identical with structure and the operation principle of the transmission mechanism of existing electric hammer with operation principle, this the applicant, will be not repeated.

Improvements of the present utility model are: the front end lateral wall of this cylinder 2 is positioned at the position contacting with bearing 5 and overlaps intrinsic snap ring 9, this snap ring 9 is 65 manganese rings, be commonly called as spring steel snap ring, on the lateral wall of this cylinder 2, be concaved with for elasticity snap ring 9 and embed the installation groove (not shown) of installing, snap ring 9 embeds this and installs in groove, and the lateral wall of snap ring 9 is provided with to convex with and stretches into the protuberance (not shown) of installing outside groove notch, and the madial wall of the lateral wall of this protuberance and bearing 5 is affixed tight fit.

A kind of modified electric hammer of the present utility model, protuberance by this snap ring 9 and bearing 5 madial walls be affixed tight fit, make to coordinate tight ness rating stronger between cylinder 2 and bearing 5, can not be subject to the reaction force of drill bit 7 and relatively move and the vibrations of cylinder 2 and occur impaired, eliminate cylinder 2 because of the reaction force of drill bit 7 mobile problem backward, extended the service life of electric hammer.

Above-described embodiment and graphic and non-limiting product form of the present utility model and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present utility model.

Claims

1. a modified electric hammer, comprise casing, handle, cylinder, piston, percussion hammer, bearing, impact bar and drill bit, wherein cylinder is placed in casing, piston and percussion hammer are all placed in cylinder, and the rear of piston in percussion hammer, one end of impact bar is connected with percussion hammer, the other end of impact bar stretches out outside cylinder and is connected with one end of drill bit, the other end of drill bit stretches out outside the head of casing, outside the rear and front end of this cylinder, overlap respectively intrinsic this bearing, two bearings is movably arranged on respectively on casing, on the madial wall of casing, be concaved with for the two bearings bearing that activity is installed respectively groove is installed, it is characterized in that: the front end lateral wall of above-mentioned cylinder is positioned at the position contacting with above-mentioned bearing and overlaps intrinsic snap ring, and the lateral wall of above-mentioned snap ring and the madial wall of above-mentioned bearing are affixed tight fit.

2. a kind of modified electric hammer as claimed in claim 1, it is characterized in that: on the lateral wall of above-mentioned cylinder, be concaved with for above-mentioned snap ring and embed the installation groove of installing, above-mentioned snap ring embeds this and installs in groove, and on the lateral wall of above-mentioned snap ring, convex with the protuberance stretching out outside above-mentioned installation groove notch, the lateral wall of above-mentioned protuberance and the madial wall of above-mentioned bearing are affixed tight fit.

3. a kind of modified electric hammer as claimed in claim 2, is characterized in that: above-mentioned snap ring is 65 manganese rings.