JPS58217852A - Planetary gear device - Google Patents

Abstract

PURPOSE:To eliminate backlash of a planetary speed reduction gear to equalize load by interposing a pressing member between a planetary gear and an idle wheel and engaging the planetary gear and the idle wheel with a sun gear. CONSTITUTION:An idle wheel 3 is loosely fitted to a planetary shaft 6, and a planetary gear 4 is loosely fitted to the idle wheel 3. The idle wheel 3 and the planetary gear 4 are coupled to each other with the phase of tooth shifted by flexible pins 11. When the idle wheel 3 and the planetary gear 4 are engaged with a sun gear 1, the flexible pins 11 are bent to eliminate the backlash.

Description

[Detailed description of the invention] The present invention relates to a planetary gear device with an idler wheel.

A mechanical diagram of a planetary gear device having an idler wheel loosely engaged between the inner circumference of the planetary gear and the outer circumference of the planetary shaft is shown in FIG. 1, and a sectional view of the idler wheel mounting portion is shown in FIG. 2. This floating I11!3 is 9
For example, as shown in Japanese Patent Publication No. 48-15556, the buried planetary gear 4 meshes with the sun gear 1 to form 111 rotations, and the planetary shaft 6, the idler wheel 6, and the planetary gear 4
It plays an important role in equally distributing the load of the plurality of planetary gears 4 to an effective oil film on each bearing part.

However, in this idler wheel 3, i+b o> of the qllll receiving part.
Although there is some drag QJ force due to viscous resistance, that force is small and can be said to be rotating under IIIQ load. In this case, due to torsional vibration etc.
: When J1 rotational fluctuation occurs, a gap C (backlash) is created between the two cars, so the idler wheel 3 moves in this gap.
A repeatedly collides violently with the tooth 1a of the sun 1'#l 1, creating a piuchisig on the south side, and in some cases, it may even reach the tooth 1 no 1 river.

In addition, 5 is the internal tooth i11, 7 is the output shaft, and 8 is ↑ Syria.

9 is suberi, 2 is human power 11111.

The present invention has been made in accordance with the above, and by preventing the occurrence of 1111 nomeli:J between the idler wheel and the sun 11L, the occurrence of tooth pitch:, llj and breakage. It is an object of the present invention to provide a planetary gear device that prevents the above problems.

One embodiment of the present invention will be described below with reference to FIGS. 3 to 5. 1 is a sun gear, 2 is an input shaft, 3 is an idler wheel, 4 is a planetary gear, and 6 is a planetary shaft. The idler wheel 3 is the same as the conventional one (it is loosely inserted between the outer periphery of the planetary shaft B and the inner periphery of the planetary gear 4, and the toothed part 3a formed at the end thereof meshes with the toothed gear 1a of the sun gear 1). Ru.

Reference numeral 11 denotes a bending rod that is fitted into a radial hole 10 drilled in the idler wheel 3 and a radial hole 12 drilled in the planetary gear 4 so that it can be bent relatively easily. The bar portion 11a is preferably small in diameter.

When inserting the above-mentioned bending iron: J11, first shift the phases of the idler wheel 3 and the planetary gear 40 appropriately, and
At the end of the day, 11 bending screws were inserted. Next, the phases of the floating gear 3 and the planetary gear 40 are matched, and the teeth 3a thereof are meshed with the teeth 1a of the sun gear 1, as shown in FIG. 5, to assemble.

The initial phase O) when incorporating the above-mentioned bending wheel 11 is determined by taking into consideration the shifting force and the restoring force of the bending wheel 11;
The dimensions are determined so that the idler wheel 3 presses the sun gear 1 with a force that does not easily cause the idler wheel 3 to tremble in a loose crash. In general, Parakura 1. Second, 1) It is preferable to determine the above dimensions by shifting the phase.

During operation of the device d, the power from the -C8 human power shaft 2 is 1. Output qi from carrier 8 via planetary gear 4
h 7 (transmitted to 11(+) in Figure 2).

At this time, the tooth portion 3a of the idler wheel 6 is a flexure gear: J1
The sun tooth meshes with this due to the elasticity of 1.

Since the tooth 1a Ic of the wheel 1 is pressed at the time of 'i'il', there is torsional vibration on the input 1Il12 side (a), so that both teeth 5a and ia do not collide.

Fig. 6 shows an embodiment of the song according to the present invention, in which the bending pin J15 is provided in the axial direction◎ Fig. 7 shows a further embodiment of the invention, in which the idler wheel 3 The abutment area between the idler wheel 3 and the planetary gear 4 is achieved by inserting a bolt into the axial hole 21 provided in both the idler wheel 3 and the planetary gear 4, and tightening it with a nut 23 and adjusting the tightness of the nut 23. The frictional resistance of 23 can be adjusted.

The present invention is constructed as described above.1 According to the present invention, the teeth of the idler wheel and the sun gear are always brought into contact with each other by the pressing member interposed between the idler wheel and the planetary gear. Because of this, there is no chatter between the two (therefore, the pitch of the teeth: J) and breakage are prevented.

[Brief explanation of drawings]

FIGS. 1 and 2 are a mechanical diagram and a sectional view showing an example of a conventional planetary gear device Q). 6 to 5 show one embodiment of the present invention, FIG. 3 is a diagram of FIG. 2, and FIGS.
FIG. 6 and 7 show another embodiment of the present invention.
It is also a diagram. 1...Thick lIl,)1'# car, 3...Idle wheel, 3a...
... Tooth part of the free wheel, 4 ... Free Jji tooth + 1i, (5.
・・Planet axis, 11. 15 ・Kumigeshi, 22 ・Pol I-, 23 ・・Natsuto agent Akatsuki Sakama

Claims (1)

[Claims] Between the outer circumference of the planetary shaft and the inner circumference of the planetary gear, there is a thick 1 d at the end.
In a planetary gear device comprising floating wheels in which teeth for anastomosis with the gears are formed, between the planetary gears and the floating wheels, there are provided teeth of the floating wheels and teeth of a sun gear that mesh with the floating wheels. A planetary gear device characterized in that a pressing member is interposed to bring the two into constant contact with each other.