JPH073063Y2 - Gear type shaft coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a gear type shaft coupling, and more particularly to an oil seal device thereof.

[Conventional technology]

FIG. 2 shows an example of a conventional gear type shaft coupling connection structure. Inner cylinder
Rotational restraint between 1, 1'and shafts 2, 2'is made by keys 3, 3 '. On the other hand, the keys 3 and 3'and their key grooves are provided with a required clearance ε for assembly.
The sealing agent 5 is applied to the clearance ε in order to prevent the lubricating oil 4 sealed in the joint from leaking to the outside through the clearance ε. It involves complicated work.

[Problems to be solved by the device]

The above conventional gear type shaft coupling has the following problems to be solved. That is, the lubricating oil 4 is enclosed in the gear type shaft coupling by placing the key 3, the inner cylinder 1, and the outer cylinder 6 on the shaft 2 on one side and the key 3 ', the inner cylinder 1 on the shaft 2'on the other side. After assembling the outer cylinder 6 ', the outer cylinder 6,
This is done after combining 6'and connecting with the reamer bolt 7, but it has the following drawbacks.

(1) It is essential to measure and fill the required amount of lubricating oil beforehand, but the actual filling is as shown in (2) below.
Since it is performed by the user, it tends to be a standard work, and as a result, the amount of oil is insufficient or excessive.

(2) The user of the gear type shaft coupling is responsible for connecting the reamer bolt 7. For this reason, tightening of the bolt tends to be incomplete, and the oil sealability cannot be guaranteed.

(3) Connect the shafts 2 and 2'to the inner cylinders 1 and 1'for the keys 3 and 3 '
Since oil is used, oil easily leaks from the assembly gap ε at the same portion.

[Means for Solving the Problems]

As a solution to the above-mentioned problems, the present invention has a pair of inner cylinders which have a flange for coupling with a shaft at one end and have the other end loosely mating with an inner cylinder on the opposite side and an external gear on the outer circumference thereof. A pair of an outer cylinder that straddles both inner cylinders of the inner cylinder and that is engaged with the outer gear by an inner gear provided in the inner cylinder near both ends, a loosely fitting portion between the inner cylinders, and inner circumferences of both ends of the outer cylinder. (3) A gear type shaft coupling comprising: a lubricating oil seal means fitted between the inner cylinder and the outer periphery of the gear type shaft joint.

[Action]

Since the present invention is constructed as described above, it has the following effects. That is, when the flanges of both inner cylinders and the shaft ends (having flanges) on both sides are combined, torque is transmitted from the inner cylinder to the outer cylinder and from the outer cylinder to the inner cylinder on the opposite side via the internal gear and the external gear. To be done. The keyway is not involved in this process. On the other hand,
Lubricating oil such as gears is sealed in the space surrounded by the sealing means provided at the inner peripheral portions of both ends of the outer cylinder and the loose fitting portion of the inner cylinders. It will not leak. In addition, a pair of an inner cylinder and an outer cylinder in which lubricating oil is enclosed are unitized to form a supply unit.

Further, the sealing means can be achieved only by inserting O-rings, for example, at the inner peripheral portions of both ends of the outer cylinder and the loosely fitting portions of the inner cylinders at a total of three places.

〔Example〕

An embodiment of the present invention will be described with reference to FIG. External gear 15,
The inner cylinders 11 and 11 'having the same 15' mesh with the outer gear 12 having the inner gears 16 and 16 'having the same number of teeth as the outer gears 15 and 15', and one side, for example, The rotational force from the left side to the other side is the flange 8 mounted on the shaft 2 having the key 3,
The reamer bolt 7, the inner cylinder 11, the outer cylinder 12, the inner cylinder 11 ′, and the reamer bolt 7 ′ are transmitted to the flange 8 ′ mounted on the shaft 2 ′ and the key 3 ′.

On the other hand, the φ-rings 9 and 9 ′ are the inner cylinders 11 and 11 ′ and the outer cylinder 12, and the φ-rings 10 are the radial gaps between the inner cylinders 11 and 11 ′ that are buried, and the lubricating oil 4 leaks to the outside in the gear type shaft coupling. It is provided for the purpose of prevention.
Further, the restricting element 13 such as a snap ring is fixed to the inner cylinder 11 ', while the non-fixed side of the restricting element 13 is in the space formed by the inner cylinder 11 and the bush 14 fixed to the inner cylinder 11 by press fitting or screws. The inner cylinder 11 is squeezed and the axial movement of the inner cylinder 11 with respect to the inner cylinder 11 'is limited to the dimension H in the figure. As a result, the component parts containing the lubricating oil of the gear type shaft coupling (hatched portions in the figure) are integrated, and the unit supply by the manufacturer of the gear type shaft coupling becomes possible.

Therefore, since the lubricating oil 4 is enclosed at the manufacturing stage, the user simply connects the flanges of the inner cylinders 11 and 11 'with the flanges 8 and 8'mounted on the shafts 2 and 2'. Well, the lack of lubricating oil and excessive defects are resolved, and the oil sealability can be guaranteed. Also, since the environment for holding the lubricating oil and the keys 3 and 3'are independent of each other, there is no concern that the lubricating oil will leak from the gap at the top of the key as in the conventional case.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

(1) Since the manufacturer can supply a unit in which the lubricating oil of the gear type shaft coupling is enclosed by the manufacturer, the problem of excess or deficiency of the lubricating oil can be eliminated even when the user side assembles the gear type shaft coupling.

(2) Since the manufacturer encloses the lubricating oil in the unit and supplies it, the guarantee of the oil sealing property is perfect.

(3) The sealed portion of the lubricating oil is surrounded by the sealing means such as the φ ring and has nothing to do with the key, so that there is no concern that oil will leak from the top of the key.

(4) Since the user can operate the gear type shaft coupling simply by connecting the shaft flanges to each other, the initial maintenance becomes remarkably simple.

(5) The lubricating oil is completely enclosed by inserting the O-rings in only three places.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a view of a conventional example, (a) is the vertical cross-sectional view thereof, and (b) is b- of (a).
FIG. 2,2 '... Shaft, 4 ... Lubricating oil, 7,7' ... Reamer bolt, 8,8 '
… Flange, 9, 9 ′, 10… φ ring, 11… Inner cylinder, 12… Outer cylinder, 13… Restricting element, 14… Bushing, 15, 15 ′… External gear, 1
6,16 '… Internal gear.

Claims (1)

[Scope of utility model registration request] 1. A pair of inner cylinders, one end of which has a flange for coupling with a shaft and the other end of which is engaged with an inner cylinder of the opposite side and which has an outer gear on its outer circumference, and an inner cylinder of the same pair. An outer cylinder that is engaged with the external gear by an internal gear that is provided on the inner periphery near both ends of the outer cylinder, an engaging portion between the inner cylinders, the inner periphery of both ends of the outer cylinder, and the outer periphery of a pair of inner cylinders. And a sealing means for lubricating oil fitted between the gear type shaft coupling and the gear type shaft coupling.