CN104772522B

CN104772522B - A kind of hand-held cutting machine

Info

Publication number: CN104772522B
Application number: CN201410012146.8A
Authority: CN
Inventors: 张响亮; 马建英
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2017-10-17
Anticipated expiration: 2034-01-10
Also published as: CN104772522A

Abstract

The invention discloses a kind of hand-held cutting machine, including housing, motor in housing, the saw blade being connected by the output revolving shaft of transmission mechanism and motor, saw blade is located at the side of housing forward end, transmission mechanism at least includes the jackshaft and output shaft being rotatably arranged on housing, first gear on the output revolving shaft of motor, second gear and the 3rd gear located at jackshaft two ends, the 4th gear located at output shaft one end, the rotational axis line of jackshaft and the output shaft is parallel to each other, the other end of output shaft is connected with saw blade, first gear is engaged with second gear, 3rd gear is engaged with the 4th gear, first gear is conical pinion gear, second gear is taper gear wheel；The present invention is under conditions of it can meet most of cutting-ins, and simple in construction, good manufacturability, cost is low, while energy loss is small, and without the skidding occurred in the structures such as V belt translation, can not overload the shortcomings of.

Description

A kind of hand-held cutting machine

Technical field

The present invention relates to a kind of more preferable hand-held cutting machine of transmission performance.

Background technology

Hand-held cutting machine is one of the most frequently used cutting tool in electric tool, in the art at present most hand-held to cut The drive mechanism that cutting mill is used is tertiary gear, turbine and worm, bevel gear+belt（Timing belt）Transmission or one-stage gear transmission. The problem of these structures all have certain：Three-stage cylindrical gear is complicated, and manufacture, assembling, maintenance process are numerous and diverse, cost It is high；Then transmission efficiency is low for turbine and worm, and energy loss is big so that machine surface temperature is higher；Belt transmission is then easily skidded, and hardly possible is full The big cutting-in of foot, high capacity cutting are used；Toothed belt transmission then easily collapses tooth, especially in the case of big cutting-in, height are responsible for, it is impossible to rise To overload protective function；Then cutting-in is too low for one-stage gear transmission, it is impossible to meet big cutting-in condition.It is in Authorization Notice No. In CN101336146 patent of invention, a kind of hand-held cutting machine of two-stage transmission is described, can be avoided to a certain extent above Produced problem, but the travelling gear that the two-stage is driven hand-held cutting machine is helical gear, these helical gears are according to certain Engage successively in direction so that whole transmission mechanism seems too fat to move, and the accessibility of instrument is poor.

The content of the invention

It is an object of the invention to provide a kind of hand-held cutting machine, than hand-held cutting machine of the prior art, with more preferable Accessibility.

In order to overcome the defect of prior art, the invention provides a kind of hand-held cutting machine, including housing, located at the shell Internal motor, the saw blade being connected by the output revolving shaft of transmission mechanism and the motor, the saw blade are located at the shell The side of body front end, the transmission mechanism at least includes the jackshaft that is rotatably arranged on the housing and output shaft, is located at First gear on the output revolving shaft of the motor, the second gear located at the jackshaft two ends are with the 3rd gear, located at institute The 4th gear of output shaft one end is stated, the rotational axis line of the jackshaft and the output shaft is parallel to each other, the output shaft The other end be connected with the saw blade, the first gear is engaged with the second gear, the 3rd gear and the described 4th Gear is engaged, and the first gear is conical pinion gear, and the second gear is taper gear wheel.

Preferably, the 3rd gear and the 4th gear are helical gear.

It is further preferred that the small end end face of the first gear is towards the front end of the hand-held cutting machine, described second The small end end face of gear is towards the saw blade, and the second gear is consistent with the tooth trace rotation direction of the 3rd gear, and the described 3rd Gear, the 4th gear are located between the small end end face of the second gear and the saw blade.

It is further preferred that the radius of the 3rd gear is less than the small end end face of the first gear to second tooth The distance of wheel shaft heart line.

Preferably, the hand-held cutting machine also includes the cutting-in governor motion for being used to adjust depth of cut.

It is further preferred that the cutting-in governor motion includes the bottom that can be moved along the cutting-in direction of the saw blade (4) Plate, the locking member for the position of the bottom plate to be locked, the bottom surface of the bottom plate is perpendicular to plane where the saw blade.

It is further preferred that the bottom of the locking member is not less than 19mm to the distance of the bottom surface of the bottom plate.

The hand-held cutting machine of the present invention passes through two-stage gear drive, so under conditions of it can meet most of cutting-ins, structure Simply, good manufacturability, cost is low, while energy loss is small, and without the skidding occurred in the structures such as V belt translation, can not overload Shortcoming.

Brief description of the drawings

Accompanying drawing 1 is the overall schematic of hand-held cutting machine of the invention；

Accompanying drawing 2 is the front sectional view of hand-held cutting machine of the invention；

Accompanying drawing 3 is the vertical view cutaway drawing of hand-held cutting machine of the invention；

Accompanying drawing 4 is hand-held transmission mechanism of cutting machine of the invention and the sectional view of saw blade part；

Accompanying drawing 5 is the front view of hand-held cutting machine cutting-in governor motion part of the invention；

Accompanying drawing 6 is partial schematic diagram of the hand-held cutting machine cutting-in governor motion of the invention in installation site.

In accompanying drawing：

1- housings, 2- motors, 3- transmission mechanisms, 4- saw blades, 5- cutting-in governor motions；

31- first gears, 32- second gears, the gears of 33- the 3rd, the gears of 34- the 4th, 35- jackshafts, 36- output shafts；

41- shields；

51- bottom plates, 52- adjustable plates, 53- locking members.

Embodiment

Being preferred embodiment described in detail to hand-held cutting machine of the invention below in conjunction with the accompanying drawings.

Referring to accompanying drawing 1-4, the schematic diagram of each part of hand-held cutting machine of the invention is depicted, user is defined and grips the instrument When the direction that faces be front, while accompanying drawing 5-6 for prior art hand-held cutting machine schematic diagram as a comparison.The present invention is hand-held Cutting machine includes housing 1, the motor 2 in housing 1, the saw blade 4 being connected by transmission mechanism 3 with the rotating shaft transmission of motor 2, Saw blade 4 is located at the front portion of whole housing 1.Transmission mechanism 3 in the present invention employs secondary gear transmission, while the secondary gear Transmission employs bevel-gear sett and a pair of helical gears, specifically including first gear 31, second gear 32, the 3rd gear 33 With the 4th gear 34, wherein first gear 31 is conical pinion gear, and second gear 32 is taper gear wheel, first gear 31 and Two gears 32 are intermeshed, and the rotating shaft core line of the two is mutually perpendicular to, while the small end end face of first gear 31 is towards instrument Front end, the small end end face of second gear 32 is towards saw blade 4；3rd gear 33 and the 4th gear 34 are a pair of intermeshing helical teeth Wheel, they are co-located between second gear 32 and saw blade 4；Connected between the gear 33 of second gear 32 and the 3rd by jackshaft 35 Connect, connected between the 4th gear 34 and saw blade 4 by output shaft 36, the axial line of jackshaft 35 and output shaft 36 is parallel to each other, And rotationally it is connected with housing 1.The wind produced by boasting during revolution by fan can be made towards user by so setting Obliquely downward, if second gear position with now on the contrary, if wind direction also on the contrary, the oblique upper of user can be blown to, increase peace Full hidden danger.

For jackshaft 35, it is not bevel gear and helical gear that its two ends, which is, so that its will necessarily by axial force, in order that Obtain the axle to be unlikely to by equidirectional excessive axial force, by the small end end face of bevel gear towards the side of saw blade 4, by helical teeth Wheel is arranged between bevel gear and saw blade 4, and makes second gear 32 consistent with the rotation direction of the 3rd gear 33, for example, be all the right side Rotation, such helical gear and the axial force that bevel gear produces are in opposite direction, cancel each other out a part of axial force, play protection and make With.

In order that obtaining each gear is owned by sufficient rotation space, the radius of the 3rd gear 33 is less than the small of first gear 31 Hold end face to the distance of the rotary shaft of second gear 32, such first gear 31, the 3rd gear 33 will not be interfered, improved whole The security of individual transmission mechanism 3.

In order to which the depth of cut to hand-held cutting machine of the invention is adjusted, adjusted in the outer cutting-in that is also additionally provided with of housing 1 Mechanism 5, as shown in figures 5-6, it includes the bottom surface bottom plate 51 vertical with the place plane of saw blade 4, is fixedly connected with bottom plate 51 Adjustable plate 52, the locking member 53 for the position of lock adjustment plate 52, bottom plate 51 can adjust vertically up and down, so Saw blade 4 can be controlled to be used for the length of cut portion, the cutting-in of hand-held cutting machine is controlled with this；Adjustable plate 52 is vertical with bottom plate 51 Connection, adjustable plate 52 can drive bottom plate 51 to slide up and down；Locking member 53 is used to lock the position of adjustable plate 52, preferably adopts With the form of lock handle.

As the further preferred scheme of cutting-in governor motion 5, the bottom surface of the bottom of locking member 53 to bottom plate 51 Distance be not less than 19mm（About 1 inch）.The advantage of this scheme is：In north America region, the plank of 1 inch is general occupies The material of processing is commonly used in home, the bottom of locking member 53 is designed to not to the distance of the bottom surface of bottom plate 51 Less than 19mm, due to not being the technical staff of specialty in many users in North America, the alignment tool without professional cutting machine, this When they can use the plank pad of this 1 inch under locking member 53, alignment substantially is carried out to cut direction.

Compared to prior art, the present invention has accomplished simple in construction, technique on the premise of instrument using effect is not influenceed Property is good, and cost is low, than hand-held cutting tool of the prior art, also there is more preferable accessibility.

The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention, all according to the present invention The equivalent change or modification that Spirit Essence is made, should all be included within the scope of the present invention.

Claims

1. a kind of hand-held cutting machine, including housing (1), the motor (2) in the housing (1), pass through transmission mechanism (3) The saw blade (4) being connected with the output revolving shaft of the motor (2), the saw blade (4) is located at the housing (1) front end Side, it is characterised in that：The transmission mechanism at least includes the jackshaft (35) being rotatably arranged on the housing and output Axle (36), the first gear (31) on the output revolving shaft of the motor (2), located at the jackshaft (35) two ends Two gears (32) and the 3rd gear (33), the 4th gear (34) located at the output shaft (36) one end, the jackshaft (35) rotational axis line with the output shaft (36) is parallel to each other, the other end and the saw blade of the output shaft (36) (4) connect, the first gear (31) is engaged with the second gear (32), the 3rd gear (33) and the described 4th Gear (34) is engaged, and the first gear (31) is conical pinion gear, and the second gear (32) is taper gear wheel；

The hand-held cutting machine also includes the cutting-in governor motion (5) for being used to adjust depth of cut, the cutting-in governor motion (5) Including can be moved along the cutting-in direction of the saw blade (4) bottom plate (51), for by the locking of the position of the bottom plate (51) Locking member (53), the bottom surface of the bottom plate (51) is perpendicular to plane where the saw blade (4), the locking member position In the side of the housing, the distance of the bottom surface of the bottom of the locking member (53) to the bottom plate (51) is not less than 19mm。

2. the hand-held cutting machine according to claim 1, it is characterised in that：3rd gear (33) and the 4th tooth It is helical gear to take turns (34).

3. the hand-held cutting machine according to claim 2, it is characterised in that：The small end end face court of the first gear (31) To the front end of the hand-held cutting machine, the small end end face of the second gear (32) is towards the saw blade (4), second tooth Wheel (32) is consistent with the tooth trace rotation direction of the 3rd gear (33), the 3rd gear (33), the 4th gear (34) position Between the small end end face and the saw blade (4) of the second gear (32).

4. the hand-held cutting machine according to claim 3, it is characterised in that：The radius of 3rd gear (33) is less than institute The small end end face of first gear (31) is stated to the distance of the second gear (32) rotational axis line.