CN2832447Y

CN2832447Y - Hand-held electric hammer relating to axle clutch structural improvement

Info

Publication number: CN2832447Y
Application number: CN 200520043739
Authority: CN
Inventors: 魏镇祥
Original assignee: YANJIE INDUSTRY Co Ltd SHANGHAI
Current assignee: YANJIE INDUSTRY Co Ltd SHANGHAI
Priority date: 2005-07-25
Filing date: 2005-07-25
Publication date: 2006-11-01
Anticipated expiration: 2015-07-25

Abstract

The utility model discloses a hand-hold electric hammer relating to a shaft clutch structural improvement. A shaft clutch comprises an impact rotating shaft, a gearwheel shell and a connecting shaft sleeve, wherein a column-shaped shaft diameter is provided with semicircular spherical surface counter bores in the impact rotating shaft, and a steel ball is arranged in each semicircular spherical surface counter bore and is connected with the gearwheel shell via anti-thrust limit. A semicircular pin slot is arranged in a circular hole in the connecting shaft sleeve. With changing the arrangement program of a structure position, the utility model completely eliminates the inevitable relative rotation which can cut frictional resistance between the end surface of a pressure spring and the end surface of the gearwheel shell in an operating condition in instant. The utility model can effectively increase the high performance requirements of clutches, improve the drilling performance in electric hammers and satisfies the reasonable power consumption and the reasonable temperature increment of motors.

Description

A kind of axle improved hand-held electric hammer of clutch configuration that relates to

Technical field

The utility model belongs to a kind of improved hand-held electric hammer, relates in particular to a kind of axle improved hand-held electric hammer of clutch configuration that relates to.

Background technology

At present, beater mechanism is in the similar electric hammer product of crank-swinging formula both at home and abroad, and axle all is arranged on the output revolving shaft with the overload protection clutches assembly, and its assembly structure principle is identical, but the concrete structure difference.The assembly universal architecture comprises the clutch profile of tooth both at home and abroad: shallow tooth of claw type and roller, connecting shaft form: different structure form roller connecting shaft transmission.The thrust structure: two ends are the thrust of axle-steel silk back-up ring.Positional alignment when mounted: elastic spring → connecting shaft cover → gear housing → stage clip → thrust circle → elastic spring.

Summary of the invention

In above-mentioned domestic and international similar electric hammer product structure, conventional axle is with in the clutch configuration positional alignment assembly, when clutch be in " from " during state, between stage clip end face and gear housing end face, unavoidably produce relative rotation to gnaw and cut frictional resistance, additionally increase the motor load that do not have.Position arrangement architecture in the utility model assembly structure for rationally discharging the defective of above-mentioned existence, effectively improves the required high performance requirements of clutch, and has improved drilling performance in the electric hammer, satisfies reasonable power consumption of motor and due temperature rise.

By changing the locations of structures alignment problem, thoroughly eliminating moment generation between stage clip end face under operating mode and gear housing end face unavoidably relatively rotates to gnaw and cuts frictional resistance.Effectively improve the required high performance requirements of clutch, and improve and improved drilling performance in the electric hammer, so satisfy the reasonable power consumption of motor and temperature rise should be arranged.

Description of drawings

Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

Fig. 1 is the sectional structure chart of the utility model hand-held electric hammer axle with clutch;

Fig. 2 is an A-A direction cutaway view among Fig. 1;

Fig. 3 is a B-B direction cutaway view among Fig. 1;

Fig. 4 is a C-C direction cutaway view among Fig. 1;

Fig. 5 impacts rotating shaft front half sectional view;

Fig. 6 is a D-D direction cutaway view among Fig. 5;

Fig. 7 is an E-E direction cutaway view among Fig. 5;

Fig. 8 is the front schematic view of connecting shaft cover 5;

Fig. 9 is the F-F direction cutaway view among Fig. 8;

Figure 10 is a G-G direction cutaway view among Fig. 8.

The specific embodiment

See also shown in the accompanying drawing 1, axle of the present utility model comprises impact rotating shaft 1, steel ball 2, gear housing 3, roller 4, connecting shaft cover 5, roller pin 6, stage clip 7, thrust circle 8, elastic spring 9 compositions with clutch.

Shown in Fig. 5～7, the cylindrical diameter of axle is provided with semicircle sphere counterbore 11 in the impact rotating shaft 1, amounts to six five equilibriums and evenly distributes, and according to Fig. 1～2, has disposed six steel balls 2 in the semicircle sphere counterbore 11, with spacing connection of gear housing 3 thrusts.

According to Fig. 8 ~ 10 as seen, in the connecting shaft cover 5 interior circular holes 53, be provided with semicircle cotter way 51, totally three five equilibriums are uniform, according to Fig. 1,4 and Fig. 5,7 shown in, impact rotating shaft 1 diameter of axle and be provided with three semicircle cotter ways 12 that five equilibrium is uniform, and with three roller pins 6 that dispose shown in Fig. 1, be matchedly connected with three semicircle cotter ways 51 in the connecting shaft cover 5.According to Fig. 1, between gear housing 3 and connecting shaft cover 5, be provided with six rollers 4, the other end of connecting shaft cover 5 links to each other with stage clip 7 thrusts, and stage clip 7 other ends link to each other with 8 thrusts of thrust circle, are equipped with in thrust circle 8 and the rotating shaft 1 that the elastic spring thrust is spacing to be connected.Thus, constitute arrangement and the structural assembly of axle of the present utility model with clutch position.

Position grouping of the present utility model and structure have been got rid of stage clip 7 and connecting shaft and have been overlapped 5 pressurizeds and rotate to gnaw between end face and cut frictional resistance, gear housing 3 axial thrusts all adopt steel ball rolling thrust structure, effectively alleviated " from " state the time, the axial rub resistance.The axial thrust pivoting friction is changed into the axial thrust sliding friction when having improved in the electric hammer drilling simultaneously, effectively improves drilling performance.

More than all embodiment only for the explanation the utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technical schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.

Claims

1, a kind of axle that relates to is with clutch configuration improved hand-held electric hammer, and described axle comprises that with clutch impacting rotating shaft, gear housing, connecting shaft cover forms, it is characterized in that,

In the described impact rotating shaft, its cylindrical diameter of axle is provided with semicircle sphere counterbore, has respectively disposed a steel ball in the described semicircle sphere counterbore, with spacing connection of gear housing thrust;

In the circular hole in the described connecting shaft cover, be provided with semicircle cotter way.

2, a kind of axle that relates to according to claim 1 is characterized in that with the improved hand-held electric hammer of clutch configuration the semicircle sphere counterbore in the described impact rotating shaft amounts to six five equilibriums and distributes.

3, a kind of axle that relates to according to claim 2 is characterized in that with the improved hand-held electric hammer of clutch configuration, and totally three five equilibriums are uniform for the semicircle cotter way in the described connecting shaft cover in the circular hole.

4, a kind of axle improved hand-held electric hammer of clutch configuration that relates to according to claim 3, it is characterized in that described device further comprises: three roller pins, the semicircle cotter way in described roller pin and the described connecting shaft cover is matchedly connected.

5, a kind of axle that relates to according to claim 4 is characterized in that with the improved hand-held electric hammer of clutch configuration, also is provided with six rollers between gear housing and connecting shaft cover.