CN2284660Y - Stepless speed-regulating table drill - Google Patents

Abstract

The utility model discloses a stepless speed-regulating table drill, which comprises a box body, an electrode, a protective cover, a main shaft, a column spring, a triangular belt, a tooth shaft, a screw rod and a bearing. The utility model is characterized in that the utility model also comprises the upper and the lower wheels of a drive wheel, the upper and the lower wheel of a passive wheel, a fixing seat and a square shaft sleeve. The utility model overcomes the insufficiency of the speed gear of the existing table drill tower-typed triangular wheel. The utility model can realize stepless speed gear.

Description

Berch drill with stepless speed regulation

The utility model relates to a kind of mechanism driving speed change system, particularly Berch drill with stepless speed regulation.

Existing bench drill is to adopt traditional pagoda type belt wheel V belt to carry out transmission, speed change, because the high and minimum speed difference of this product is bigger, and required gear is more, as 5 grades, 12 grades and 16 grades of speed changes, 12 grades and 16 grades of rotating speeds, must in the middle of active and passive the wheel, refill a transition wheel, just can reach 12 grades or 16 grades of rotating speeds.By the position of conversion V belt, just can reach the effect of speed change again, its structure is uncomplicated comparatively speaking, and cost is lower slightly, but comparatively bothers during speed change, and, with at present incompatible to the safety requirements of electric tool in the world.The selection of speed changes at different levels simultaneously is subjected to certain limitation, can not freely select according to the situation of actual process operation by the operator, as the bench drill of all sizes such as the domestic 13mm that produces, 16m, 20mm, 32mm such as Laizhou, Shandong Machinery Plant of Light Industry, Jia Taizuanchang, the West Lake, Hangzhou bench drill factory, its drive mechanism all is that the pagoda type vee-pulley carries out transmission.

The purpose of this utility model is to provide a kind of Berch drill with stepless speed regulation that can carry out speed change without the pagoda type V belt.

The technical solution of the utility model is realized by following measures: a kind of Berch drill with stepless speed regulation, it comprises casing, motor, guard shield, main shaft, it is characterized in that it comprises that also the promptly movable wheel of wheel, driving wheel lower whorl are wheel, bearing, follower lower whorl, cylindrical spring II, square shaft cover on fast pulley, V belt, speed adjusting lever, tooth axle, holder screw mandrel, the follower on cylindrical spring (I), the driving wheel; Its connecting relation is: on wheel and driving wheel lower whorl are installed in that motor stretches out on the driving wheel spool, cylindrical spring (I) is installed in the end of motor projecting shaft just, the top of taking turns on the driving wheel, wheel and follower lower whorl are installed in the spline housing of lengthening just on the axle sleeve on the follower, the square shaft cover is installed on the casing, wheel and follower lower whorl on the follower, wheel and driving wheel lower whorl are just the opposite on mounting means and the driving wheel, be that wheel is fast pulley on the follower, the follower lower whorl is movable wheel, bearing in the lower end of follower lower whorl and the holder is connected, a cylindrical spring (II) is housed between holder and the casing, the other end of holder and a rhizoid bar flexibly connect, the other end of screw mandrel promptly has tooth partly, meshes with a rooted tooth axle in casing, the other end of tooth axle is an external part, speed adjusting lever is housed, and V belt places on the driving wheel between wheel and the driving wheel lower whorl, also place take turns on the follower and the follower lower whorl between; Its dynamic relationship is: when motor rotates, move speed adjusting lever, make tooth axle and screw mandrel produce transmission, be upper and lower motion, forcing screw mandrel to drive holder moves up or down, holder drives the follower lower whorl again and moves up or down, moving up or down of follower lower whorl, compel to take turns on the V belt drive driving wheel moving up or down, drill bit is contained on the main shaft.Its operation principle is: the centrifugal force that is produced during the belt pulley running (because driving wheel and follower respectively have a movable wheel and fast pulley), simultaneously, increase or reduce distance between movable wheel and the fast pulley by the power of the last or following motion of the gear drive of speed adjusting gear, thereby make V belt take turns up and down active and passive that position between two changes, reaches the rotating speed that increases or reduce main shaft.When holder drove the follower lower whorl and moves downward extreme lower position, the wheel of going up of driving wheel moved downward under the active force effect of cylindrical spring II spring simultaneously, was high speed this moment; When holder band follower lower whorl moves upward highest point, this moment follower upper and lower two-wheeled combination, driving wheel go up wheel under centrifugal force and V belt make progress thrust, move upward simultaneously, be lowest speed this moment.

The utility model is compared with background, following useful effect is arranged: (1) stepless speed regulation: Berch drill with stepless speed regulation can carry out infinitely variable speeds, when having changed pagoda type V belt transmission in the past and changing the situation of bench drill rotating speed or changed original the sort of speed change, with the outmoded method of hand conversion V belt in the pulley groove position; (2) easy to operate, safe and reliable: as because reasons in structure, for example pass by three belt pulleys to change two belt pulleys into, also make vibration, the noise of each link generation that bigger reduction is arranged.

Accompanying drawing is the Berch drill with stepless speed regulation structural representation

Now in conjunction with the accompanying drawings the utility model is further described:

A kind of Berch drill with stepless speed regulation, it comprises casing 15, motor 17, guard shield 14, main shaft 16 is characterized in that it also comprises the cylindrical spring made from spring steel (I) 1, by alloy aluminum, cast iron or engineering plastics are made the promptly movable wheel of wheel 2 on the driving wheel, by alloy aluminum, cast iron, it is fast pulley that engineering plastics are made driving wheel lower whorl 3, the V belt 4 that the rubber rope structure is made, by alloy aluminum, cast iron, engineering plastics are made speed adjusting lever 5, by alloy aluminum, iron, the tooth axle 6 that steel is made, by alloy aluminum, cast iron, engineering plastics are made holder 7, the screw mandrel 8 that is made of steel or iron, by alloy aluminum, cast iron, engineering plastics are made and are taken turns 9 on the follower, bearing 10, bore with alloy, cast iron, the follower lower whorl 11 that engineering plastics are made, the cylindrical spring II12 that makes with spring steel, by alloy aluminum, cast iron, engineering plastics are made square shaft cover 13; Its connecting relation is: wheel 2 and driving wheel lower whorl 3 are installed on the axle that motor 17 stretches out on the driving wheel, the top that cylindrical spring (I) 1 is installed on the driving wheel wheel 2 is the end of motor 17 projecting shafts just, the spline housing that wheel 9 and follower lower whorl 11 are installed in lengthening on the follower is just on the square shaft cover 13, square shaft cover 13 is installed on the casing 15, wheel 9 and follower lower whorl 11 on the follower, wheel 2 and driving wheel lower whorl 3 are just the opposite on mounting means and the driving wheel, be that wheel 9 is fast pulley on the follower, follower lower whorl 11 is movable wheel, bearing 10 in the lower end of follower lower whorl 11 and the holder 7 is connected, a cylindrical spring (II) 12 is housed between holder 7 and the casing 15, the other end of holder 7 and a rhizoid bar 8 flexibly connect, the other end of screw mandrel 8, promptly there is tooth partly, in casing, mesh with a rooted tooth axle 6, the other end of tooth axle 6 is an external part, speed adjusting lever 5 is housed, V belt 4 places on the driving wheel between wheel 2 and the driving wheel lower whorl 3, also place take turns on the follower 9 and follower lower whorl 11 between; Its dynamic relationship is: when motor 17 rotates, move speed adjusting lever 5, make tooth axle 6 and screw mandrel 8 produce transmission, be upper and lower motion, and screw mandrel 8 drive holders 7 are moved up or down, holder 7 drives follower lower whorl 11 again and moves up or down, moving up or down of follower lower whorl 11, move up or down by wheel 2 on the V belt 4 drive driving wheels, drill bit is contained on the main shaft 16.

Claims (5)

1. Berch drill with stepless speed regulation, it comprises casing (15), motor (17), guard shield (14), main shaft (16), it is characterized in that it comprises that also the promptly movable wheel of wheel (2), driving wheel lower whorl (3) are wheel (9), bearing (10), follower lower whorl (11), cylindrical spring II (12), square shaft cover (13) on fast pulley, V belt (4), speed adjusting lever (5), tooth axle (6), holder (7), screw mandrel (8), the follower on cylindrical spring I (1), the driving wheel; Its connecting relation is: on wheel (2) and driving wheel lower whorl (3) is installed in that motor (17) stretches out on the driving wheel spool, the top that cylindrical spring (I) (1) is installed on the driving wheel wheel (2) is the end of motor (17) projecting shaft just, the spline housing that wheel (9) and follower lower whorl (11) is installed in lengthening on the follower is just on the square shaft cover (13), square shaft cover (13) is installed on the casing (15), wheel (9) and follower lower whorl (11) on the follower, wheel (2) and driving wheel lower whorl (3) are just the opposite on mounting means and the driving wheel, be that wheel (9) is fast pulley on the follower, follower lower whorl (11) is movable wheel, bearing (10) in the lower end of follower lower whorl (11) and the holder (7) is connected, between holder (7) and the casing (15) cylindrical spring (II) (12) is housed, the other end of holder (7) and a rhizoid bar (8) flexibly connect, the other end of screw mandrel (8), promptly there is tooth partly, in casing (15), mesh with a rooted tooth axle (6), the other end of tooth axle (6) is an external part, speed adjusting lever (5) is housed, V belt (4) places on the driving wheel and takes turns between (2) and the driving wheel lower whorl (3), also places to take turns between (9) and the follower lower whorl (11) on the follower; Its dynamic relationship is: when motor (17) rotates, move speed adjusting lever (5), make tooth axle (6) and screw mandrel (8) produce transmission, be upper and lower motion, and screw mandrel (8) drive holder (7) is moved up or down, holder (7) drives follower lower whorl (11) again and moves up or down, during the moving up or down of follower lower whorl (11), move up or down by wheel (2) on V belt (4) the drive driving wheel, drill bit is contained on the main shaft (16).

2. Berch drill with stepless speed regulation according to claim 1 is characterized in that taking turns (9), follower lower whorl (11) on wheel (2), driving wheel lower whorl (3), the follower on the driving wheel, is made by alloy aluminum, cast iron or engineering plastics.

3. Berch drill with stepless speed regulation according to claim 1 and 2 is characterized in that speed adjusting lever (5) made by alloy aluminum, cast iron, cast steel or steel.

4. according to claim 1,2 described Berch drill with stepless speed regulation, it is characterized in that square shaft cover (13) is to be made by powder metallurgy or steel.

5. according to claim 1,2 described Berch drill with stepless speed regulation, it is characterized in that holder (7), make by alloy aluminum, cast iron, cast steel.