CN2238119Y - Variable speed type hacksaw - Google Patents

Abstract

The utility model relates to a push-cutting variable speed type hacksaw machine. The saw teeth of a saw blade is placed forward, the front end of a saw bow is raised between 0.3 DEG to 5 DEG. The rotation phase and the eccentric quantity of cutter lifting and two pressurized two eccentric wheels can be changed. The back pull sawing of the hacksaw machine is changed into the front push sawing. The cutting and colliding block of the hacksaw machine is changed into a movable colliding block, causing the shutdown procedure to be reliable when the hacksaw machine cuts workpieces. The motor variable speed device of the hacksaw machine is changed into multiple wedge belts and cone pulley variable speed. The displacement plate of the motor, L-shaped nuts and a stop block are used for simplifying the variable speed procedure, causing the cost of the bow saw machine to be reduced. The operation is simplified; the electric consumption is reduced; the work efficiency is increased.

Description

But a kind of hacksawing machine of broaching easy to change speed

The utility model relates to a kind of improved hacksawing machine.

Existing ram type hacksawing machine with saw bow on workpiece backward straight line broach sawing workpieces, so sawtooth must place backward, in order to sawing.Because saw blade is parallel with the saw bow motion guide rail, then sawtooth is many with the number of teeth that surface of the work contacts simultaneously when work, and sawtooth incision workpiece is difficult like this, and the load of saw bow is big, consumed power big, work efficiency is lower.The cut-out collision block that the saw bow end of former machine is joined is a rectangle iron block, after rigging position is fixing, just must adjust the height that workpiece is placed, and just can cut and require the position.When less when the depth of cut, workpiece will break and when disconnected, and cutting off collision block and cutter lifting tooth bar, to touch strike note very big.The speed change of former sawing machine need match by the axle of the gear train that links to each other with motor and the crank plate wheel that affects saw bow and to finish, must the different gear train of conversion when needing to change the sawing machine running speed, and dismounting trouble then, time-consuming taking a lot of work.Customer requirements can provide a kind of effect that improves hacksawing machine thus, simplifies procedures, the novel hacksawing machine of increasing work efficiency.

The purpose of this utility model be to provide that a kind of sawing is fast, power consumption less, speed change hacksawing machine easily.

The utility model is to implement like this:

Obtain power from the transmission system of the former ram type hacksawing machine shown in the accompanying drawing 3,4 by motor, it is to pass to axle (I) after slowing down by a pair of gear (1) (2), obtains two kinds of different rotating speeds by connector (7) (8).Throw off when connector (7) makes gear (5) (6), connector (8) is thrown off (4) (6), and then axle (II) gets 97 rev/mins rotating speed; Mesh when connector (7) makes gear (5) (6), connector (8) is thrown off (4) (6), and then axle (II) gets 75 rev/mins rotating speed.Two kinds of rotating speeds that axle (II) obtains drop saw bow (11) by crank disc (9) link rod (10), make saw bow obtain the reciprocating speed of per minute 97 times and 75 times.And the power of hydraulic control system is transmitted by axle (II), two pistons (14) (15) that drop oil pump by the eccentric wheel (12) (13) on the axle (II) are done moving up and down of coordination mutually, and pressure oil is transported in the work fluid cylinder (17) through over-allocation stopcock (16).The position difference of utilize distributing stopcock, feed when making saw bow obtain ascending, descending, sawing, action such as cutter lifting during backhaul.Behind the sawing end-of-job, utilize saw bow to cut off collision block bump tooth bar (18), will distribute stopcock to be returned to the position that rises by gear (19) (20) and make saw bow rise.Power is interrupted when arresting lever (21) bumps against press button (22) in uphill process.

With reference to accompanying drawing 1,2 and accompanying drawing 5,6, the utility model is by elder generation the sawtooth direction of saw blade to be made into forwards, and makes the saw blade leading peak upwards lift 0.5 °-5 °; The angle of line between the crank disc gear center of circle of cutter lifting eccentric wheel (13) and the link pin on eccentric wheel circle center line connecting and the crank disc gear center of circle and the crank disc gear is changed to 110 ° from 107.5 °, its offset changes 3 millimeters into from former 6 millimeters, to pressurize the again crank disc gear center of circle of eccentric wheel (12) and the line in the eccentric wheel center of circle and the angle between the link pin line on the crank disc gear center of circle and the crank disc gear is changed to 35 ° from 342.5 °, its offset is constant, still is 8.85 millimeters.Because these improvement, saw bow can constantly lift during sawing forward, makes the sawtooth all the time can equivalent incision workpiece, this is that sawtooth is circular-arc action because under identical oil pressure, and the number of teeth that saw blade and workpiece are contacted simultaneously is less, make sawtooth cut workpiece easily, then cut disappear brisk, efficient is high.

With reference to accompanying drawing 7,8, the terminal set cut-out collision block (23) of the saw bow of former sawing machine (11) is a common iron block, now change mobilizable collision block into, its structure is to establish a collision block seat (29) in the collision block position, it can be fixed on the saw bow end equally, open a collision block hole at the position that should clash into tooth bar (18), collision block (23) can be inserted, a hold-down screw (32) circular hole is opened at the seat top relative with the collision block hole, join a screw and collision block (23) and join, collision block can be present slide up and down in the hole, on screw, join a spring (31), for collision block can not rotated, be inserted in a stop pin (28) in the cotter way (30) of collision block.This collision block is contained on the hacksawing machine, can change the sawed-off position of saw blade, and make movable collision block clash into tooth bar rapidly by adjusting the height of collision block, lifts saw bow.

With reference to accompanying drawing 9,10, Fig. 1,2, the power of hacksawing machine is from motor, and former sawing machine need drive crank disc by gear train (1) (2) (3) (4) (5) (6), and sawing machine is turned round.Now make into to change the anodontia disk of former crank into the crank gear dish, make crank gear dish (9) adapted gear (24), on the axle of gear (24), join a cone pulley (25) again; A cone pulley of adapted (27) on motor reel is mixed polywedge bet on cone pulley (25) (27).In order to make the cone pulley speed change convenient, establish a steady pin (33) on the special flange dish (39) with motor, make ring flange (39) be center of circle rotation by steady pin (33), on another fixed position of motor flange dish, establish a screw (36) and the supporting L shaped nut (37) of screw (36), loading onto motor Displacement plate (34) near upright lathe bed one side of sawing machine, on Displacement plate (34), open an elongated slot (35), use with L shaped nut (37) for wearing motor hold-down screw (36), when with L shaped nut (37) when unscrewing, the chimb of its L shaped nut moves down, and withstood by the baffle plate under the elongated slot (38), continuing firmly to twist, motor will inevitably be that the center of circle moves up with the steady pin (33) of motor flange dish, then make the polywedge bet on the cone pulley loosening, then can tighten L shaped nut (37) with opposite direction again to the needs position by mobile like a cork polywedge bet on cone pulley, motor falls, the tensioner polywedge bet, tighten L shaped nut at last, motor promptly is fixed, and the speed change purpose is finished.

By above-mentioned improvement, a kind of hacksawing machine occurs with the superperformance that noise is little, easy and simple to handle, power consumption is little, work efficiency is high, and the production cost of sawing machine is low, and is easy to maintenance.

Below in conjunction with accompanying drawing hacksawing machine of the present utility model is done detailed elaboration.

Accompanying drawing 1 is a front elevational schematic of improving the transmission system of back hacksawing machine;

Accompanying drawing 2 is that schematic diagram is looked on a left side of improving the transmission system of back hacksawing machine;

Accompanying drawing 3 is transmission system front elevational schematic of original shape hacksawing machine;

Accompanying drawing 4 is that schematic diagram is looked on the transmission system left side of original shape hacksawing machine;

Accompanying drawing 5 is eccentric phse conversion schematic diagrames of two of new machine (A):

Accompanying drawing 6 is eccentric phse conversion schematic diagrames of two of former machine (B);

Accompanying drawing 7 is that active type cuts off collision block structure front elevational schematic;

Accompanying drawing 8 is that schematic diagram is looked on an active type cut-out collision block structure left side;

Accompanying drawing 9 is structure front elevational schematic of motor gear box control panel;

Accompanying drawing 10 is that schematic diagram is looked on the structure left side of motor gear box control panel;

With reference to accompanying drawing, the sawtooth of the saw blade on the saw bow (11) is placed forward, and make the saw bow front end lift 0.5 °-5 °, again the angle of the line in the cutter lifting eccentric wheel axle center and the crank disc center of circle and the crank disc center of circle and crank disc link pin line is increased to 110 ° from 107.5 °, its offset is kept to 3 millimeters by former 6 millimeters; The eccentric wheel median line of will pressurizeing and crank disc link pin angle reduce to 35 ° from 342.5 °, and its offset is constant.This two eccentric phase place changes, and will adjust the sawing action of hacksawing machine, and saw bow can constantly be lifted when sawing forward, makes saw blade sawtooth equivalent incision all the time workpiece.Thereby improved work efficiency, reduced power consumption.

Can control reliably for the cut-out collision block (23) that makes the saw bow end and to lift saw bow (11) rapidly after cutting off workpiece, cut off power then.Can on the position of former cut-out collision block, adorn the collision block device of an activity, its structure is to open a through circular hole on a collision block seat (29), a fixedly screw of collision block (32) can be inserted in this circular hole top, the slightly larger in diameter of bottom circular hole, can under insert a circular collision block (23), spring groove is arranged at the top of this collision block, a built-in spring (31), hold-down screw (32) inserts from collision block seat tip circle hole, pass spring (31) and circular collision block (23) to be threaded, circular collision block one side is established a locating slot (30), passes a side from the collision block seat outside with an anti-rotation pin (28) and enters in the locating slot (30), collision block can only be gone up, move down, can not rotate.

Steady pin (33) at motor flange dish (39) moves the center of circle as motor, another screw (36) and L shaped nut (37) are as the motor movable part, movably fix a motor Displacement plate (34) in the stretched position of the contiguous sawing machine in ring flange (39) position at this, open a vertical slot (35) on the plate, move in groove for hold-down screw (36), establish a L shaped nut (37) on hold-down screw (36), elongated slot (35) is divided into a baffle plate (38).This L shaped nut (37) can tighten motor flange dish (39) counterclockwise to rotate, L shaped nut (37) rotates in a clockwise direction can become flexible motor flange dish (39), when becoming flexible L shaped nut, the chimb of this nut moves down, and withstand baffle plate (38), make motor flange dish (39) stressed and be that the center of circle moves up with steady pin (33).So just lift motor, the cone pulley (27) that fits on the motor shaft is also lifted simultaneously, and the polywedge bet that then hangs on the cone pulley (25) (27) is also loosening, polywedge bet can be moved to the appropriate location, can reach the speed change purpose.After polywedge bet moves and finishes, promptly turn with counter clockwise direction with spanner, the chimb of L shaped nut and baffle plate (38) are thrown off, and motor falls, and the tensioner polywedge bet is tightened L shaped nut at last, can lock motor.

Claims (3)

1. But 1, a kind of hacksawing machine of broaching easy to change speed, constitute by parts such as ram, saw bow, saw blade, cut-out collision block, crank disc, oil pump piston, eccentric wheel, travelling gears, its spy is the sawtooth of the saw blade on the saw bow (11) is placed forward, and make the saw bow front end lift 0.5 °-5 °, again the angle of the line of the circle center line connecting of the axle center of cutter lifting eccentric wheel (13) and crank disc gear (9) and crank disc gear (9) center of circle and crank disc link pin is increased to 110 ° from 107.5 °, its offset is kept to 3 millimeters by former 6 millimeters; The circle center line connecting of pressurization eccentric wheel (12) center of circle and crank disc gear (9) and the angle of the crank disc gear center of circle and crank disc link pin line reduce to 35 ° from 342.5 °, and its offset is constant.
2. 2, hacksawing machine according to claim 1, the cut-out collision block (23) that it is characterized in that its saw bow end is to open a through circular hole on a collision block seat (29), a hold-down screw (32) can be inserted in this circular hole top, the slightly larger in diameter of bottom circular hole, can under insert a circular collision block (23), spring groove is arranged at the top of this collision block, the built-in spring of groove (31), hold-down screw (32) inserts from the circular hole at collision block seat top, pass spring (31) and circular collision block (23) to be threaded, circular collision block (23) one sides are established a locating slot (30), locate with a stop pin (28) from collision block seat (29) outside.
3. 3, the hacksawing machine of root a tree name claim 1, it is characterized in that establishing a steady pin (33) on the motor flange dish (39) of sawing machine, establish a hold-down screw (36) on another fixed position, and put L shaped hold-down nut (37), at the perpendicular motor Displacement plate (34) of adorning on one's body of sawing machine, plate is provided with elongated slot (35), and groove is divided into a baffle plate (38), can be withstood by baffle plate (38) when L shaped nut moves down in a clockwise direction.

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