JPH03178764A - Deceleration gear device in disk rotation type working machine - Google Patents

Abstract

PURPOSE:To continue the rotation strongly even in case of receiving an unforeseen load, etc., during a main work by providing a changing over device at the side of an engage in the state of the changing over device giving the engaging motion with either one part of the composing gear groups to the engager. CONSTITUTION:A driven shaft 5 and disk are rotated at high speed via a motive shaft 2 large diameter motive gear 4 engager 14 projection bar 10 recessed bar 13 medium shaft 7 transmission gear 9 driven gear 6 in order, in case of a motor being rotated at the time when an engager 14 is engaged with the large diameter motive gear 4. A pin 15 is fitted to a pin hole 16 to integrate the engager 14 and an idling gear 8, in case of the engager 14 being moved up by ascending a sleeve 2 by rocking a rocking lever 27 in the clockwise direction with the operation of an operation handle 30. In the case of the motor being rotated in this integration state, the driven shaft 5 and disk are rotated at low speed via the motive shaft 2 small diameter motive gear 3 idling gear 8 engager 14 projection bar recessed bar medium shaft 7 transmission gear 9 driven gear 6 in order.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a disc with a sponge bat encasing abrasive particles, a disc with a felt bat, a disc with a cloth bat, a disc with a brush brush, and a wire brush. A disc with a large number of grinding blades in a predetermined arrangement, a disc with a ring-shaped grindstone, a disc with a large number of small grindstones in a predetermined arrangement, or a disc made of abrasive cloth (these are simply referred to as "discs" in this text). )
etc. are rotated by a motor to perform waxing, finishing of floors and walls, polishing of floors and walls, cleaning of floors and walls, mortar floors, etc.
Work to eliminate unevenness on walls, concrete laitance removal button and level down work, P tiles, epoxy resin,
Removal of hard resin flooring buttons and adhesives such as hard urethane,
Floor/wall polishing machine, floor/wall cleaning machine, concrete floor/mortar floor/wall grinding machine, concrete floor/mortar floor/wall surface grinding machine for roughening work on metal surfaces such as aluminum (these are simply referred to as main work in the text), etc. Regarding the reduction gear device for disc-rotating work machines such as finishing machines (these are referred to as work machines in this text), in detail, it is possible to switch between high and low rotational speeds of the disc without changing the rotational speed of the motor. This invention relates to a reduction gear device for a working machine.

[Conventional technology]

2. Description of the Related Art Conventionally, working machines are known in which the rotational speed of a disk is switched between high and low by electrical switching such as switching the rotational speed of a motor, such as changing the number of poles of the motor or switching the voltage, and deceleration is performed using a belt.

[Problem to be solved by the invention]

The working machines described in the above-mentioned prior art are quiet and comfortable during the main work, but they lack power, especially at the time of starting and immediately after switching, and at this time, it is difficult to get caught unexpectedly. It often stopped when subjected to a large load (shock).

SUMMARY OF THE INVENTION An object of the present invention is to provide a reduction gear device that enables the implementation of a new high-speed/low-speed switching type work machine that continues to rotate powerfully even when subjected to unexpected loads (shocks), etc.

[Means for Solving the Problems] In order to achieve the above object, the reduction gear device that is attached to the work machine of the present invention comprises a gear group that reduces the rotation of the driving shaft and transmits it to the driven shaft in a high-speed rotation system. A gear group for configuring a high-speed rotation system and a gear group for configuring a low-speed rotation system, and a gear-shaped engager is attached to the gear group for configuring a high-speed rotation system and the gear group for configuring a low-speed rotation system. A state button is provided in the gear group to switch and match, and when the gear group is engaged, the rotation of the driving shaft is transmitted to the driven shaft, and when the gear group is not engaged, the rotation of the driving shaft is not transmitted. A switching device is provided adjacent to the engaging member so as to cause the engaging member to engage one of the constituent gear groups.

〔Example〕

The embodiment shown in the figure has a driving shaft (2) in the gearbox (1).
) is supported in a vertical and rotatable state with the upper end of the driving shaft (2) protruding above the gear box (1),
A small-diameter drive gear (3) button and a large-diameter drive gear (4) are attached to the drive shaft (2) at a location within the gear box (1) in a non-rotatable state with a slightly spaced vertical arrangement. Also, connect the driven shaft (5) on the lower wall of the gear box (1) to the driven shaft (5).
5) The lower end of the gear box (11) is supported in a vertical state protruding below the gear box (11) and in a freely rotatable state, and the driven shaft (5) is supported in a freely rotatable state.
A driven gear (6) is carved on the upper end of the intermediate shaft (7), and an intermediate shaft (7) is supported within the gear box (11 in a vertically oriented state button and in a freely rotatable state, and an idling gear is provided on the upper part of this intermediate shaft (7). (8
) is always supported in a state in which it is meshed with the small diameter drive gear (3) and in a freely rotatable state, and a transmission gear (9) is also provided at the bottom.
The intermediate shaft (7) is always supported in a state in which it is meshed with the driven gear (6) and in a non-rotatable state, and several protrusions a, which are long in the axial direction, are provided on the circumferential surface of the intermediate portion of the intermediate shaft (7). However, instead of this intermediate part, a cylindrical engager α→ is protruded, which is connected to the large diameter upper αυ and small diameter lower α force, and has a large number of axially long grooves α on the inner circumferential surface. The strip α0 and the concave strip α engage with each other in a vertically slidable manner, and a plurality of pairs of pins α9 and pins are formed on the upper end surface of the engaging element α→ and the lower surface of the free rotating gear (8). A hole αQ is provided in such a manner that it engages when the engaging element α■ is in the upward movement position and disengages when it is in the downward movement position, and a tooth is provided on the circumferential surface of the large diameter upper αυ buttoned on the engaging element (14). is carved so that the rotating portion αυ engages with the large diameter driving gear (4) in the downward movement position of the engager α→, but does not engage with the large diameter driving gear (4) in the upward movement position. A continuous concave groove ring αa is cut on the circumferential surface of the gear box (
1) A guide shaft (■) is provided in parallel to the intermediate shaft (7), and a sleeve Oυ that is movable up and down along the same axis (■) is attached to one arm of the guide shaft (■), and this sleeve CI! Two driven arms (two C-shaped tips) are provided on one side of the υ, and two driving arms (two C-shaped edges) are provided on the other side of the υ in opposite horizontal positions. (2→) is slidably fitted into the concave groove ring αa, and the operating handle shaft is rotatably supported on the side surface of the gear box (1);
A swinging lever (5) is fixed to the inner end of the operating handle ■, and the tip of the swinging lever is connected to the tip of the driving arm Ω via the pin ＼ and the elongated hole □□□. Operate on the outer edge...
The handle (7) is removably attached.

In addition, 0′ in the figure! J is concave 111c3 due to the force of the spring (to)
(2) Indicates a pusher that is inserted into C34)' to temporarily stop the sleeve Cυ at the upper or lower position.

[For production]

The reduction gear device of the present invention is fixed on a base plate with a hand pusher and a Y-driver with the lower end of the driven shaft (5) exposed to the lower surface of the base plate, and a brushed disc is attached to the lower end of the driven shaft (5). Attach the motor to the driving shaft (2) on the deceleration gear device of this invention.
The upper end of the motor is fixedly connected to the rotating shaft of the motor.

In the above embodiment, the engager αω is a large-diameter driving gear (4
), when the button is engaged and the motor rotates, the drive shaft (2) → large-diameter drive gear (4) → engaging element α → → protrusion α@ → groove α → intermediate shaft (7 )→transmission gear (9)→driven gear (6), the driven shaft (5) button and disk rotate at high speed in this order. .

In addition, the swinging lever (5) can be moved to the second position by operating the operating handle (to).
When the engager αω is moved upward by pressing the button in Figure 2 and raising the sleeve Qυ by swinging the button in the direction of the clock hand advance, the pin/α9 fits into the bottle hole (10 and is engaged). The interlock αω and the free rotating gear (8) are integrated.

When the motor rotates in this integrated state, the driving shaft (2) → small-diameter driving gear (3) → idle gear (8), engaging element α → → protrusion → groove α → intermediate shaft (7 ) → Transmission gear (
9) → The driven wheel (5) button and disk rotate at low speed via the driven gear (6) in this order.

As described above, the gear group for transmitting the rotation of the driving shaft at a reduced speed to the driven shaft is formed by a gear group for forming a high-speed rotation system and a gear group for forming a low-speed rotation system. A state button that switches gear-shaped engagers to the rotational system configuration gear group and the low-speed rotation system configuration gear group and engages them with either one of the configuration gear groups, and when the gear group is engaged, the driving shaft is connected to the driven shaft. A switching device is provided on the side of the engaged element, which transmits the rotation, and does not transmit the same when the engagement element is out of mesh. As is clear from the explanation in the above embodiment, when the drive shaft rotates with the engager being switched to the gear group for forming the high-speed rotation system, the disk rotates at high speed, and when the drive shaft rotates with the engager switched to the gear group for configuring the low-speed rotation system, the disk rotates at low speed.

[Effects of the Invention] Since the present invention has the above-described configuration, it provides a reduction gear device that enables the implementation of a high/low speed switching type work machine that continues to rotate powerfully even when receiving an unexpected load during main work. This has the effect of completely achieving the intended purpose of doing so.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a reduction gear device in a disk rotary working machine of the present invention, and FIG. 2 is a developed cross-sectional view taken along line A--A in FIG. (1)...Gear box, (2)...Driving shaft, (3
)...Small diameter driving gear, (4)...Large diameter driving gear% (
5)...driven shaft, (6)...driven gear, (7)...
・Intermediate shaft, (8)...Idle gear, (9)...Transmission gear, α■...Protrusion, Wholesale...Large diameter upper part, a...Small diameter lower part, (13- ... Concave strip, α4... Engagement element, (1... Pin, (io... Pin hole, (1a... Concave groove ring, (A)... Guide shaft, (2υ...・Sleeve,■・・
- Driven arm, C23... Driving arm, C4...C
2-shaped edge, ■... Operation... Handle shaft, (3)...
・Swinging lever, 2...pi/, /2 young...long hole, 0@...
・Operation handle, C32...press, ■...spring, (
b) (2)'...concave groove.

Claims (1)

[Claims] A gear group for decelerating and transmitting the rotation of the driving shaft to the driven shaft is formed by a gear group for configuring a high-speed rotation system and a gear group for configuring a low-speed rotation system, and these gear groups for configuring a high-speed rotation system, A state in which a gear-shaped engager is engaged with a gear group for forming a low-speed rotation system by switching to one of the gear groups for forming a low-speed rotation system, and when the gear group is engaged, the rotation of the driving shaft is transmitted to the driven shaft, and when it is not engaged, the rotation of the driving shaft is transmitted to the driven shaft. In addition, a switching device is provided beside the engaging element in such a manner that the switching device provides the engaging element with a meshing action with one of the constituent gear groups. A reduction gear device for a disc rotating type work machine, which is characterized by: