CN102632483A

CN102632483A - Electric tool

Info

Publication number: CN102632483A
Application number: CN2011100398458A
Authority: CN
Inventors: 王小勇; 赵祥
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2011-02-13
Filing date: 2011-02-13
Publication date: 2012-08-15
Anticipated expiration: 2031-02-13
Also published as: CN102632483B

Abstract

The invention provides an electric tool. The electric tool comprises a shell, a motor placed in the shell and a planet speed reducing mechanism, wherein the planet speed reducing mechanism is provided with a center wheel, a planetary wheel, a planet carrier and a gear ring; and the planet speed reducing mechanism is provided with a gearbox shell in a gapless manner so as to be directly placed in the enclosure. The electric tool can be used for remarkably reducing the radial dimension of a holding part and strengthening the holding comfort feeling of a manipulator, and better accords with man-machine engineering; the traditional gear case shell is omitted, the cost of a part is saved, the structure is simplified, the assembly is convenient, and the production efficiency is improved; and the size and weight of a complete machine are reduced, and the electric tool is more beneficial to operation and carry.

Description

Electric tool

Technical field

The present invention relates to a kind of electric tool, particularly relate to a kind of reducing gear of electric tool.

Background technology

Field of power tools particularly has impact wrench, percussion drill of impact function etc., and generally gear reduction is placed in the gear-box; Particularly concerning planetary gear speed reducing mechanism, do not see as yet and be not with gear box casing, yet; Because gear box casing can occupy certain volume, particularly gear box casing at a distance from putting outside gear ring in casing, can make the diameter at this place become big; When just being positioned at the holding area of fuselage for those gear-box reducing gears; Will certainly increase the circumferential size of holding area, when operation, cause the discomfort that grips for the operator, not meet human engineering; And, if run up when noise and strike note occurring, do not changing under gear parameter and the fit at the gear-box reducing gear, be difficult to improve.

Summary of the invention

The present invention is directed to the defective of above-mentioned prior art, a kind of electric tool be provided, can reduce the radial dimension of holding area significantly, enhance operator grip comfort, ergonomic.

A kind of electric tool; Comprise: casing; Place motor and planetary gear speed reducing mechanism in the casing, planetary gear speed reducing mechanism has centre wheel, planetary gear, planet carrier and gear ring, and wherein: planetary gear speed reducing mechanism is separated with gear box casing between not and directly is placed in the said casing.

The further order of the present invention is to provide the electric tool with reducing gear of low noise and strike note when operation, and the outer peripheral face of the gear ring of planetary gear speed reducing mechanism is directly corresponding with the medial surface of casing or be separated with flexible material.

Further, flexible material is flexible glue or sponge or rubber.

Particularly advantageously be, gear ring can not circumferentially be rotatably fixed in the casing by a carriage, and carriage and gear ring are respectively equipped with locking portion on adjacent end face.

Further, locking portion is configured to can adaptive each other double wedge and groove, and double wedge is arranged on carriage and gear ring on one of them, and groove is arranged on carriage and gear ring one of other.

Further, be supported on the rotating shaft rotating shaft coaxle of carriage quilt and motor, carriage be provided with the inner peripheral surface of gear ring adaptive can to gear ring perpendicular to the axis of rotating shaft radially on the boss that positions.

Further, carriage has the outer peripheral face concordant with the outer peripheral face of gear ring.

A preferred embodiment is: planetary gear speed reducing mechanism be arranged in the casing with the corresponding section, holding area.

Further; The casing front end is supported with working head; The Y of working head is vertical in fact with the Y of holding area, also is provided with the output that can transmit planetary gear speed reducing mechanism in the casing and changes into rotary impact assembly and the vertical duction mechanism that the impact of working head is rotated.

Through adopting above technical scheme, the present invention can realize following useful technique effect:

The advantage of this structure:

Saved traditional gearhousing, saved a part and practice thrift cost;

Simplified structure is convenient to assembling, has improved production efficiency;

Can dwindle gripping a size, it is more comfortable that grip position is gripped, more ergonomic;

Can reduce the size of complete machine and the weight of complete machine, be more conducive to operate and carry;

The casing inner wall of parcel ring gear increases the bag flexible glue, has adjusted the gap between gear train automatically, the strike note when having improved startup of noise and moment or brake.

Description of drawings

Fig. 1 is the sketch map of electric tool of the present invention, wherein, for the purpose of clear, can see inner structure, and half casing is removed;

Fig. 2 is the explosive view of reducing gear.

The specific embodiment

Do further detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.

As shown in Figure 1, the preferred a kind of angle of electric tool of the present invention impacts kind tool 20, can be that angle impacts screwdriver, angle percussion drill or impact wrench etc.; It is involuted by two halves casing 10; Partly be formed with the microscler holding area 10 ' on Y Y that supplies the operator to grip at the main body of casing 10, on the casing of locating in this holding area 10 ' 10 starting switch 11 be installed, be used to control the start and stop of the motor 2 in the casing 10; In this embodiment; Motor 2 is by power brick 1 power supply, and in other embodiments, motor 2 also can be by Alternating Current Power Supply; But be supported with the working head 9 of clamping screwdriver, drill bit etc. at the front end of casing 10, the Y X of working head 9 is in fact perpendicular to the Y Y of holding area 10.Its operation principle is; The rotation output of motor 2 finally converts to through planetary gear speed reducing mechanism, rotary impact assembly and vertical duction mechanism the impact at working head 9 positions is rotated; Wherein, vertical duction mechanism comprises the bevel pinion 81 that is arranged on the axial Y and is arranged on the bevel gear wheel 82 on the axial X.

In conjunction with Fig. 2; Planetary gear speed reducing mechanism comprises the centre wheel 14 that is fitted on motor 2 output shafts 13; A pair of symmetrically arranged planetary gear 17 with these centre wheel 14 external toothings; Each planetary gear 17 is connected on the planet carrier 18 through a steel column 16 respectively, and is axially locating with respect to planet carrier 18 on the Y through packing ring 15, engagement in a planetary gear 17 and a gear ring 4 form; The rotary impact assembly comprises rotary impact wheel 6, by impact block 7 and back-moving spring 5, be configured with a pair of symmetrically arranged impact teeth 61 on the beater wheel 6, beater wheel 6 by the process of deceleration output shaft 19 driven rotary in; An impact teeth 61 at first impacts by on the impact block 7, forms a rotary impact of the instrument (drill bit or spanner or screwdriver etc.) that working head 9 places are clamped, and receives the temporary transient obstacle resistance of the instrument that comes from working head 9 positions; And move to the direction of compression spring 5; Thereby, crossed this impact teeth 61 by impact block 7, then; Back-moving spring 5 discharges elastic potential energy and rapidly swiveling wheel 6 is pushed back original position; Make next impact teeth 61 and bumped against by impact block 7, the impact that forms is again rotated, and impacts this periodic intermittence to rotate the most at last that operation element is driven in the workpiece to be processed.

Planetary gear speed reducing mechanism of the present invention directly is contained in the casing 2; And roughly place with 10 ' the corresponding position, holding area on; Casing 2 directly wraps up ring gear 4, preferably, is provided with the flexible material 12 of the strike note that the noise that can eliminate gear and moment produce when starting and stopping in the casing 2; This flexible material 12 should comprise the gear ring 4 that is arranged on planetary gear speed reducing mechanism and flexible material 12 parts between the casing 2 at least; Help further adjusting the gap between the gear train automatically, form flexible adjustment, reduce noise; Flexible material 12 can be gum sponge, flexible glue and rubber skin etc.; Especially; Flexible glue can adopt formed in mould mode directly to be formed on the casing, because planetary gear speed reducing mechanism is not provided with gearhousing, casing 10 will directly born the supporting role and the sealing function of planetary gearsets; So for the sealing of the lubricant grease in the casing 2, the abutment joint place that the present invention is employed in the two halves casing of butt joint establishes oil storage and hermetically-sealed construction (not shown).

Be different from gear ring outer peripheral face in the prior art and be provided with the protruding structure that is connected with gear box casing, gear ring 4 of the present invention can not circumferentially be connected on the carriage 3 rotationally, is not changing transmission when under the situation of gear parameter; For the radial dimension that gear ring 4 is located corresponding to holding area 10 ' try one's best little; Gear ring 4 is separately positioned on its adjacent end face with the carriage 3 adaptive parts that are connected, and in this embodiment, this adaptive part comprises to be located at the convexity 32 on carriage 3 end faces respectively and to be located at the groove 43 on gear ring 4 end faces; In other embodiments; Understand easily, protruding 32 with the position is set can exchanges of groove 43, can also be provided with boss 33 on the end face of carriage 3; Boss 33 fits within the inner peripheral surface 41 of gear ring 4; Play gear ring 4 positioning action diametrically, preferably, the outer peripheral face 31 of carriage 4 is concordant with the outer peripheral face 42 of gear ring 4.

Disclosed electric tool is not limited to the structure of content described in the above embodiment and accompanying drawing representative.On basis of the present invention to the shape of member wherein and conspicuous change that the position is done, substitute or revise, all within the scope that the present invention requires to protect.

Claims

1. electric tool; Comprise: casing; Place motor and planetary gear speed reducing mechanism in the casing, said planetary gear speed reducing mechanism has centre wheel, planetary gear, planet carrier and gear ring, it is characterized in that: said planetary gear speed reducing mechanism is separated with gear box casing between not and directly is placed in the said casing.

2. electric tool according to claim 1 is characterized in that: be separated with flexible material between the outer peripheral face of the gear ring of said planetary gear speed reducing mechanism and the medial surface of said casing.

3. electric tool according to claim 2 is characterized in that: said flexible material is flexible glue or sponge or rubber.

4. electric tool according to claim 3 is characterized in that: said flexible glue adopts formed in mould mode directly to be formed on the described casing.

5. electric tool according to claim 1 is characterized in that: said gear ring can not circumferentially be rotatably fixed in the said casing by a carriage, and said carriage and said gear ring are respectively equipped with locking portion on adjacent end face.

6. electric tool according to claim 5; It is characterized in that: said locking portion is configured to can adaptive each other double wedge and groove; Said double wedge is arranged on said carriage and gear ring on one of them, and said groove is arranged on said carriage and gear ring one of other.

7. electric tool according to claim 5; It is characterized in that: be supported on the said rotating shaft rotating shaft coaxle of said carriage quilt and said motor, said carriage be provided with the inner peripheral surface of said gear ring adaptive can to said gear ring perpendicular to the axis of said rotating shaft radially on the boss that positions.

8. electric tool according to claim 7 is characterized in that: said carriage has the outer peripheral face concordant with the outer peripheral face of said gear ring.

9. electric tool according to claim 1 is characterized in that: the outer peripheral face of the gear ring of said planetary gear speed reducing mechanism is directly corresponding with the medial surface of said casing.

10. according to each described electric tool of claim 1 to 9, it is characterized in that: said planetary gear speed reducing mechanism be arranged in the said casing with the corresponding section, holding area.

11. according to each described electric tool of claim 1 to 9; It is characterized in that: said casing front end is supported with working head; The Y of said working head is vertical in fact with the Y of holding area, also is provided with the output that can transmit said planetary gear speed reducing mechanism in the said casing and changes into rotary impact assembly and the vertical duction mechanism that the impact of said working head is rotated.