CN100346936C

CN100346936C - Balanced rotating electric tool

Info

Publication number: CN100346936C
Application number: CNB011247762A
Authority: CN
Inventors: 罗伯特·L·哈特曼; 史蒂文·C·卡尼; 伊西德罗·M·阿拉尼斯
Original assignee: Snap On Technologies Inc
Current assignee: Snap On Inc
Priority date: 2001-03-07
Filing date: 2001-08-08
Publication date: 2007-11-07
Anticipated expiration: 2021-08-08
Also published as: EP1238761A1; JP2002264042A; TWM248576U; CN1373027A

Abstract

A hand-held rotary power tool includes a housing with a top portion, a handle portion, and a bottom portion arranged into a relatively T-shaped configuration. A motor is located within the bottom portion of the housing. An input shaft extends from the motor through the handle portion and rotatively couples the motor to a gear box located in the top portion of the housing. An output shaft extends forwardly from the gear box at an angle that is substantially perpendicular to the longitudinal axis of the input shaft, and is coupled to a chuck for rotation thereof. The tool is balanced to inhibit rotation in the plane of the input and output shafts, in use.

Description

Balanced rotating electric tool

Technical field

The application relates to a kind of rotating electric tool on the whole.More particularly, the application relates to a kind of hand-held balanced rotating electric tool that counterpoise distributes and has closely hand-held ability that has.

Background technology

Hand-held rotating electric tool is common, and what can buy on the market mainly is this class instrument of two types, and promptly pistol is rotary activated tool and right angle rotary activated tool.Two types of instruments have a great difference on their general direction.The pistol wushu throw of standard has a motor, a gear-box and an output shaft, and they are portion's horizontal aligument in the enclosure all, and a handle that is suspended on the shell back.The right angle rotary activated tool is more directed, uses so that have in the narrow space.The right angle rotary activated tool has a motor and a gear-box, and they are rectilinear aligning in handle, and an output shaft, and it flatly extends from gear-box.

Pistol is one of them shortcoming of rotary activated tool that they are relatively more uneven.Great majority among these drills all load the throw that is positioned at the handle front weightily in front, generally are the heaviest parts in gear-box and the motor.This just produces a turning moment on the handle that is positioned at place, drill rear portion.Hand must at first overcome this turning moment, so that tool using exactly.For the active force that turning moment applied that end load produced before the balance makes user's hand fatigue, and can cause when tool using inaccurate.

The right angle rotary activated tool typically is used for not allowing with pistol the place of rotary activated tool to be used in the workspace.The major defect of these instruments is that they usually are difficult to handle.This is because motor normally is positioned at the handle portion inside of instrument, thus force handle than man-machine control desirable can be with user's hand comfortable grip wide.Generally speaking, the right angle rotary activated tool is normally less the man-machine control fairness of rotary activated tool than pistol, and therefore, they only use as specific purpose tool usually.

Summary of the invention

Therefore, the application's overall purpose provides a kind of hand-held rotating electric tool, and this instrument has been avoided the shortcoming of existing design, and additional structure and operating advantage is provided simultaneously.

For realizing above-mentioned purpose of the present invention, the invention provides a kind of balanced rotating electric tool, it comprises a motor, and also comprises: an overall T-shaped shell, described shell comprise a top section with preceding and rear end; A handle portion, described handle portion have a upper end of the top section that is connected to shell, the rear end of described top section is extended back exceed the upper end of described handle portion; With a base section that is suspended under the handle portion, described motor is positioned at this base section; A gear-box, it is arranged on the inside of top section; A power shaft, it is rotary to be connected to motor on the gear-box; With an output shaft, its rotary being connected on the gear-box, and at a certain angle by its extension, this angle is perpendicular to power shaft, the axis that described handle portion is limited by described power shaft relatively about 15 ° angle that tilts.

An important characteristic of the present invention is that hand-held rotating electric tool has the comparison measures for balance, thereby makes the turning moment on the handle reduce to minimum.

Another important characteristic of the present invention is the measure that hand-held rotating electric tool has closely hand-held ability.

Another important characteristic of the present invention is that hand-held rotating electric tool carries out man-machine control formula design, but is used for the measure of user's hand comfortable grip.

Description of drawings

For the purpose of the content of managing to protect for ease of understanding, an one embodiment is shown, observes from this embodiment at accompanying drawing, the explanation below consider, during the content of promptly managing to protect, its structure and operation, and many advantages should be readily appreciated that and be suitable for.

Fig. 1 is the perspective view of an embodiment of rotating electric tool.

Fig. 2 is the side view of rotating electric tool among Fig. 1, and the while desheathing is so that further display unit.

Fig. 3 is the side view that rotating electric tool dwindles among Fig. 1.

The specific embodiment

Referring to Fig. 1, Fig. 1 is a kind of embodiment of hand-held rotating electric tool 10, and it comprises shell 11, and this shell 11 has top section 12, handle portion 13 and base section 14, and they are arranged in relatively is a kind of T shape shape.Handle portion 13 and base section 14 extend in a longitudinal direction top section 12 below, simultaneously handle portion 13 is between top section 12 and base section 14.Handle portion 13 comprises that one has the ergonomic grip 19 of contour plane, this part 19 hand that are suitable for putting around it user.

Chuck 15 extends forward from top section 12, and it has a jaw 16, is used for being connected with drill bit.Trigger 17 extends forward from handle portion 13, is used to control the running of motor.Commutation gate 18 extends to top section 12 and handle portion 13 between two parties, is used to control the direction of rotation of motor.

Referring to Fig. 2, motor 22 is arranged on the inside of the base section 14 of shell 11.Power shaft 21 rotary being connected on the motor 22, and extend through handle portion 13 from motor 22, last rotary being connected on the gear-box 20, this gear-box 20 is arranged in the top section 12 of shell 11.

Output shaft 24 is also rotary to be connected on the gear-box 20, and output shaft 24 is angled by gear-box 20 extensions, and this angle longitudinal axis with power shaft 21 basically is vertical.Output shaft 24 extends from the top section 12 of shell 11, and is connected to and is used for its rotation on the chuck 15.

Switch module 23 is connected on the trigger 17, and is connected with motor 22 conduction formulas in circuit, is used to start motor 22.Switch module 23 is provided with along the top of handle portion 13.Commutation gate 18 just in time is positioned at the top of switch module 23, and switch module 23 occupy between top section 12 and the handle portion 13.Directed gate 18 also is connected on the motor with known method, controls the direction of rotation of motor simultaneously.Power line 25 along base section 14 be provided with and also the conduction formula be connected on the motor 22, provide electric power to it simultaneously.

Referring to Fig. 2 and 3, rotating electric tool 10 is to design for optimum one-handed performance.The length of power shaft 21 motivation 22 of can powering is arranged on usefulness below the handle 13, can suitably design enough thinly with man-machine control formula handle portion 13 simultaneously, so that can be by the grasping very cosily of user's hand.Handle portion 13 comprises the grip 19 of personal-machine control formula design, and it is designed to for palmistry for drill bit safety and comfortable location.Grip 19 has contour surface, and this contour surface is consistent with the facies palmaris of hand.Handle portion 13 can also be with respect to the axis that is limited by power shaft 21 about 15 ° angle that tilts a little, so that the natural angle when very cosily adapting to hand and being added on the drill bit.In addition, trigger 17 and directed gate 18 navigate to and make finger tip than being easier near the hand of holding grip 19.

Be added in the best singlehanded design of rotating electric tool 10 is the relative equilibrium of device.The T shape shape of shell can distribute the weight of instrument effectively, so that the turning moment that weight produces on the handle reduces to minimum.The T shape shape of shell can make the heavy parts in the rotary activated tool 10, that is gear-box 20 and motor 22 can substantially perpendicularly aim in use, makes turning moment reduce to minimum simultaneously.In addition, the following turning moment that provides balance weight body to produce because of to chuck 15 that also reduced of handle portion 13 is provided motor 22.Any by the turning moment that each component weight produced in axle 21 the place ahead shells 11 top sections 12, the weight that all is set at each parts in shell 11 base sections 14 is resisted.

An additional benefit of rotary activated tool design is, motor 22 be positioned handle portion 13 below, make the length of top section 12 reduce to minimum, thereby hand-held closely ability be provided.

The problem of being stated in above-mentioned explanation and accompanying drawing only is to propose as an example rather than as restriction.Although illustrate and illustrated a special embodiment, obviously, under the relative broad range situation that does not break away from applicant's contribution, those skilled in the art can do various changes and modification.When seeing based on the viewpoint of prior art, plan the actual range of managing to protect is limited in the following claims with them.

Claims

1. a balanced rotating electric tool (10), it comprises a motor (22), it is characterized in that it also comprises:

An overall T-shaped shell (11), described shell comprise a top section (12) with preceding and rear end; A handle portion (13), described handle portion have a upper end of the top section (12) that is connected to shell, the rear end of described top section (12) is extended back exceed the upper end of described handle portion (13); With a base section (14) that is suspended under the handle portion (13), described motor is positioned at this base section;

A gear-box (20), it is arranged on the inside of top section (12);

A power shaft (21), it is rotary to be connected to motor (22) on the gear-box (20); With

An output shaft (24), its rotary being connected on the gear-box (20), and at a certain angle by its extension, this angle is perpendicular to power shaft (21),

The axis that described handle portion (13) is limited by described power shaft (21) relatively about 15 ° angle that tilts.

2. rotating electric tool as claimed in claim 1 (10) is characterized in that also comprising a trigger (17), and this trigger is arranged between described handle portion (13) and the described top section (12).

3. rotating electric tool as claimed in claim 1 (10) is characterized in that also comprising a slidably directed gate (18), and this orientation gate is positioned to by the user's of the described handle portion of grasping (13) hand approaching.

4. rotating electric tool as claimed in claim 1 (10) is characterized in that: handle portion (13) is limited to the axis of power shaft (21) the place ahead by gear-box (20).

5. rotating electric tool as claimed in claim 1 (10) comprises that also a conduction formula is connected to the power line (25) on the motor (22).

6. rotating electric tool as claimed in claim 1 (10) is characterized in that: handle portion (13) comprises the grip (19) of personal-machine control formula shape.

7. rotating electric tool as claimed in claim 1 (10) is characterized in that: the cross-sectional area of described handle portion (13) is significantly less than the cross-sectional area of described base section (14).