CN210850477U

CN210850477U - Balancing device of swing saw

Info

Publication number: CN210850477U
Application number: CN201921750451.1U
Authority: CN
Inventors: 李钢; 方进
Original assignee: Suzhou Jinshan Electric Tool Co ltd
Current assignee: Suzhou Jinshan Electric Tool Co ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-06-26
Anticipated expiration: 2029-10-18

Abstract

The utility model relates to the field of machinary, a swing saw balancing unit is disclosed, including power unit, first drive disk assembly, second drive disk assembly, swing spherical bearing, eccentric shaft, connecting plate, output shaft, straight saw piece and casing, first drive disk assembly fixes on power unit and links with the second drive disk assembly who fixes on the eccentric shaft, connecting plate and straight saw piece are fixed on the output shaft, the connecting plate card is on swing spherical bearing, swing spherical bearing and balance spherical bearing fix on the relative eccentric shaft in two sections axle centers of eccentric shaft, be provided with on the output shaft can free rotation's balancing piece, the balancing piece card is on balance spherical bearing. The swing inertia generated by the swing of the right-angle saw blade fixed on the output shaft connected with the connecting plate driven by the swing spherical bearing is offset with the swing inertia generated by the reverse swing of the balance block driven by the balance spherical bearing, and the whole swing inertia of the swing saw is offset in the swing process, so that the balance purpose is achieved.

Description

Balancing device of swing saw

Technical Field

The utility model relates to a mechanical balancing unit, in particular to pendulum saw balancing unit.

Background

An electric swing saw is a tool for driving a saw blade to swing, and the structure of the existing electric swing saw comprises: casing, power unit, drive mechanism and saw blade, power unit in the casing provides power drive saw blade swing work for the saw blade through drive mechanism, and the saw blade can produce the inertia of swing direction when being driven the swing and drive the whole vibrations of electric swing saw, produces unbalance, makes the user need difficultly hold on electric swing saw firmly, and is tired easily.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a swing saw balancing unit.

The utility model provides a technical scheme that its technical problem adopted is: a balance device of a swing saw comprises a power mechanism, a first transmission part, a second transmission part, a swing spherical bearing, an eccentric shaft, a connecting plate, an output shaft, a straight saw blade and a casing, wherein the first transmission part is fixed on a shaft of the power mechanism, the second transmission part and the swing spherical bearing are both fixed on the eccentric shaft, the connecting plate and the straight saw blade are fixed on the output shaft, the first transmission part is connected with the second transmission part, the connecting plate is clamped on the swing spherical bearing, two ends of the eccentric shaft and the output shaft are fixed on the casing through bearings, the eccentric shaft is provided with two sections of shafts with axes offset opposite to each other, a balance spherical bearing is arranged on the eccentric shaft, a balance block capable of freely rotating is arranged on the output shaft, and the balance block is clamped on the balance spherical bearing. The first transmission part is driven to rotate through the power mechanism, the first transmission part drives the second transmission part to rotate, the second transmission part drives the eccentric shaft to rotate, two shafts of the eccentric shaft, which are opposite in axis, respectively drive the swing spherical bearing and the balance spherical bearing to move in opposite directions, the swing spherical bearing drives a right-angle saw blade fixed on an output shaft connected with the connecting plate to swing to generate swing inertia to be offset with the swing inertia generated by the balance spherical bearing driving the balance block to swing reversely, and the whole swing inertia of the swing saw in the swing process is offset so as to achieve the balance purpose.

Further, the eccentric shaft is composed of a central shaft, an upper eccentric shaft, a limiting shaft and a lower eccentric shaft, the central shaft is arranged on the upper side of the upper eccentric shaft and on the lower side of the lower eccentric shaft, the limiting shaft is arranged between the upper eccentric shaft and the lower eccentric shaft, the axes of the upper eccentric shaft and the lower eccentric shaft are respectively located on two opposite sides of the axis of the central shaft, the second transmission part is fixed on the central shaft, the swing spherical bearing is fixed on the upper eccentric shaft, and the balance spherical bearing is fixed on the lower eccentric shaft. The upper eccentric shaft and the lower eccentric shaft can make the swing spherical bearing and the balance spherical bearing fixed on the upper eccentric shaft move in opposite directions when the eccentric shaft rotates.

Furthermore, one end of the connecting plate is provided with a connecting plate U-shaped groove, the other end of the connecting plate is provided with a connecting plate round hole, the connecting plate U-shaped groove is clamped on the outer spherical surface of the swing spherical bearing, and the connecting plate is fixed on the output shaft through the connecting plate round hole. When the swing spherical bearing rotates, the connecting plate fixed on the output shaft is pushed to swing towards one direction, and the output shaft rotates along with the connecting plate to drive the straight saw blade to swing.

Furthermore, one end of the balance block is provided with a balance block U-shaped groove, the other end of the balance block U-shaped groove is provided with a balance block round hole, the balance block U-shaped groove is clamped on the outer spherical surface of the balance spherical bearing, the balance block is sleeved on the output shaft through the balance block round hole, and the balance block can freely rotate on the output shaft. When the balancing spherical bearing rotates, the balancing block with the balancing block round hole sleeved on the output shaft is pushed to swing towards one direction.

Furthermore, needle roller bearings fixed on the machine shell are arranged on the central shafts at the upper end and the lower end of the eccentric shaft, an oil-containing bearing fixed on the machine shell is arranged at the upper end of the output shaft, and a deep groove ball bearing fixed on the machine shell is arranged at the middle section of the output shaft. The whole body bears the swinging inertia appeared on the eccentric shaft and the output shaft, thereby being capable of offsetting.

Drawings

FIG. 1 is a planer view of a wobble saw counterbalance;

FIG. 2 is a front view of the eccentric shaft;

fig. 3 is a front view of the connecting plate and the balancing mass.

Labeled as: the balance weight comprises a balance weight 101, a deep groove ball bearing 102, an output shaft 103, a straight saw blade 104, a machine shell 107, a balance weight round hole 108, a balance weight U-shaped groove 109, a power mechanism 200, a first transmission part 300, a needle bearing 400, a second transmission part 500, a swing spherical bearing 601, a balance spherical bearing 602, an eccentric shaft 700, a central shaft 701, an upper eccentric shaft 702, a limiting shaft 703, a lower eccentric shaft 704, an oil bearing 800, a connecting plate 900, a connecting plate round hole 901 and a connecting plate U-shaped groove 902.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

The balance device of the swing saw as shown in fig. 1 comprises a power mechanism 200, a first transmission member 300, a second transmission member 500, a swing spherical bearing 601, an eccentric shaft 700, a connecting plate 900, an output shaft 103, a straight saw blade 104 and a housing 107, wherein the first transmission member 300 is fixed on the shaft of the power mechanism 200, the second transmission member 500 and the swing spherical bearing 601 are both fixed on the eccentric shaft 700, the connecting plate 900 and the straight saw blade 104 are fixed on the output shaft 103, the first transmission member 300 is engaged with the gear of the second transmission member 500, the connecting plate 900 is clamped on the swing spherical bearing 601, the two ends of the eccentric shaft 700 and the output shaft 103 are fixed on the housing 107 through bearings, the eccentric shaft 700 is provided with two sections of shafts with opposite axes, the eccentric shaft 700 is provided with a balance spherical bearing 602, the output shaft 103 is provided with a balance weight 101 capable of freely rotating, the counterweight 101 is captured on a balancing spherical bearing 602. The first transmission component 300 is driven to rotate by the power mechanism 200, the second transmission component 500 is driven to rotate by the rotation of the first transmission component 300, the eccentric shaft 700 is driven to rotate by the rotation of the second transmission component 500, two shafts with opposite axes of the eccentric shaft respectively drive the swing spherical bearing 601 and the balance spherical bearing 602 to move in opposite directions, the swing inertia generated by the swing of the right-angle saw blade 104 fixed on the output shaft 103 connected with the connecting plate 900 driven by the swing spherical bearing 601 is offset with the swing inertia generated by the reverse swing of the balance block 101 driven by the balance spherical bearing 602, and the whole swing inertia of the swing saw in the swing process is offset so as to achieve the balance purpose. When the swing spherical bearing 601 pushes the connecting plate 900 to swing to the right, the straight saw blade 104 is driven to swing to the left, and the whole machine bears the swing inertia of the connecting plate 900 to the right and the swing inertia of the straight saw blade 104 to the left. Meanwhile, the balance spherical bearing 602 drives the balance weight 101 to swing leftwards, and the whole machine bears the swinging inertia of the balance weight 101 leftwards. The inertia moment of the balance weight 101 is balanced by the inertia moment of the connecting plate 900 and the straight saw blade 104. When the swing spherical bearing 601 pushes the connecting plate 900 to swing to the right, the straight saw blade 104 is driven to swing to the right, and the whole machine bears the left swing inertia of the connecting plate 900 and the right swing inertia of the straight saw blade 104. Meanwhile, the balance spherical bearing 602 drives the balance weight 101 to swing rightwards, and the whole machine bears the swinging inertia of the balance weight 101 rightwards. The inertia moment of the balance weight 101 is balanced by the inertia moment of the connecting plate 900 and the straight saw blade 104.

On the basis of the above, as shown in fig. 1 and 2, the eccentric shaft 700 is composed of a central shaft 701, an upper eccentric shaft 702, a stopper shaft 703 and a lower eccentric shaft 704, the central shaft 701 is disposed on the upper side of the upper eccentric shaft 702 and on the lower side of the lower eccentric shaft 704, the stopper shaft 703 is disposed between the upper eccentric shaft 702 and the lower eccentric shaft 704, the axial centers of the upper eccentric shaft 702 and the lower eccentric shaft 704 are respectively located on opposite sides of the axial center of the central shaft 701, the second transmission member 500 is fixed on the central shaft 701, the upper eccentric shaft 702 is fixed with the swinging spherical bearing 601, and the lower eccentric shaft 704 is fixed with the balancing spherical bearing 602. The upper eccentric shaft 702 and the lower eccentric shaft 704 can move the fixed oscillating spherical bearing 601 and the balancing spherical bearing 602 in opposite directions when the eccentric shaft 700 rotates. A limit shaft 703 having a diameter larger than the diameters of the upper eccentric shaft 702 and the lower eccentric shaft 704 is provided in the middle of the eccentric shaft 700, and the limit shaft 703 separates the upper eccentric shaft 702 and the lower eccentric shaft 704 so that the swing spherical bearing 601 and the balance spherical bearing 602 fixed thereto do not contact with each other and the swing spherical bearing 601 and the balance spherical bearing 602 do not affect each other during movement. The oscillating spherical bearing 601 and the balancing spherical bearing 602 have the same diameter, and are fixed to the eccentric shaft 700 so that the axes thereof are located on opposite sides of the axis of the central shaft 701.

On the basis of the above, as shown in fig. 1 and fig. 3, one end of the connecting plate 900 is provided with a connecting plate "U" shaped groove 902, the other end is provided with a connecting plate circular hole 901, the connecting plate "U" shaped groove 902 is clamped on the outer spherical surface of the swing spherical bearing 601, and the connecting plate 900 is fixed on the output shaft 103 through the connecting plate circular hole 901. When the swing spherical bearing 601 rotates, the link plate "U" shaped groove 902 of the link plate 900 is pushed to swing, and the output shaft 103 fixed to the link plate circular hole 901 of the link plate 900 rotates along with the swing of the link plate 900. The straight saw blade 104 is fixed on the output shaft 103 by a blade pressure plate 105 and a blade screw 106, and the output shaft 103 rotates to drive the straight saw blade 104 to swing.

On the basis, as shown in fig. 1 and 3, one end of the balance weight 101 is provided with a balance weight "U" shaped groove 109, the other end of the balance weight 101 is provided with a balance weight circular hole 108, the balance weight "U" shaped groove 109 is clamped on the outer spherical surface of the balance spherical bearing 602, the balance weight 101 is sleeved on the output shaft 103 through the balance weight circular hole 108, and the balance weight 101 can freely rotate on the output shaft 103. When the balancing spherical bearing 602 rotates, the balancing weight "U" shaped groove 109 of the balancing weight 101 is pushed to swing, and the balancing weight circular hole 108 of the balancing weight 101 is sleeved on the output shaft 103 to rotate freely.

In addition to the above, as shown in fig. 1, needle bearings 400 fixed to the housing 107 are provided on the central shaft 701 at both upper and lower ends of the eccentric shaft 700, an oil-retaining bearing 800 fixed to the housing 107 is provided at the upper end of the output shaft 103, and a deep groove ball bearing 102 fixed to the housing 107 is provided at the middle section of the output shaft 103. Both the eccentric shaft 700 and the output shaft 103 are fixed to the housing 107 by bearings, and the housing as a whole receives the inertia moment of oscillation occurring in the eccentric shaft 700 and the output shaft 103, thereby being offset.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A balance device of a swing saw comprises a power mechanism (200), a first transmission part (300), a second transmission part (500), a swing spherical bearing (601), an eccentric shaft (700), a connecting plate (900), an output shaft (103), a straight saw blade (104) and a shell (107), wherein the first transmission part (300) is fixed on the shaft of the power mechanism (200), the second transmission part (500) and the swing spherical bearing (601) are fixed on the eccentric shaft (700), the connecting plate (900) and the straight saw blade (104) are fixed on the output shaft (103), the first transmission part (300) is connected with the second transmission part (500), the connecting plate (900) is clamped on the swing spherical bearing (601), and two ends of the eccentric shaft (700) and the output shaft (103) are fixed on the shell (107) through bearings, and the balance device is characterized in that: the eccentric shaft (700) is provided with two sections of opposite eccentric shafts, a balancing spherical bearing (602) is arranged on the eccentric shaft (700), a balancing block (101) capable of freely rotating is arranged on the output shaft (103), and the balancing block (101) is clamped on the balancing spherical bearing (602).

2. A wobble saw counterbalance arrangement as claimed in claim 1, wherein: the eccentric shaft (700) is composed of a central shaft (701), an upper eccentric shaft (702), a limiting shaft (703) and a lower eccentric shaft (704), the central shaft (701) is arranged on the upper side of the upper eccentric shaft (702) and on the lower side of the lower eccentric shaft (704), the limiting shaft (703) is arranged between the upper eccentric shaft (702) and the lower eccentric shaft (704), the axes of the upper eccentric shaft (702) and the lower eccentric shaft (704) are respectively positioned on two opposite sides of the axis of the central shaft (701), the second transmission component (500) is fixed on the central shaft (701), the swinging spherical bearing (601) is fixed on the upper eccentric shaft (702), and the balancing spherical bearing (602) is fixed on the lower eccentric shaft (704).

3. A wobble saw counterbalance arrangement as claimed in claim 1, wherein: one end of the connecting plate (900) is provided with a connecting plate U-shaped groove (902), the other end of the connecting plate U-shaped groove (902) is provided with a connecting plate round hole (901), the connecting plate U-shaped groove (902) is clamped on the outer spherical surface of the swing spherical bearing (601), and the connecting plate (900) is fixed on the output shaft (103) through the connecting plate round hole (901).

4. A wobble saw counterbalance arrangement as claimed in claim 1, wherein: balance weight 'U' -shaped groove (109) is arranged at one end of balance weight (101), balance weight round hole (108) is arranged at the other end of balance weight (101), balance weight 'U' -shaped groove (109) is clamped on the outer spherical surface of balance spherical bearing (602), balance weight (101) is sleeved on output shaft (103) through balance weight round hole (108), and balance weight (101) can freely rotate on output shaft (103).

5. A wobble saw counterbalance arrangement as claimed in claim 1, wherein: needle roller bearings (400) fixed on the machine shell (107) are arranged on the central shafts (701) at the upper end and the lower end of the eccentric shaft (700), an oil-containing bearing (800) fixed on the machine shell (107) is arranged at the upper end of the output shaft (103), and a deep groove ball bearing (102) fixed on the machine shell (107) is arranged in the middle section of the output shaft (103).