JPS5856635Y2 - Oil supply adjustment device for sewing machines, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an oil supply adjustment device for lubricating sewing machines and the like, and more particularly to an oil supply amount adjustment device that adjusts the flow rate of lubricating oil sent at a constant pressure and flow rate.

As a means of finely adjusting the flow rate of lubricating oil that passes through an oil passage provided along the shaft center near the end of a rotating shaft that is pivotally supported in the machine frame of a sewing machine, etc., A plug-type regulating body is inserted toward the oil passage, and the flow rate is adjusted by rotating the regulating body relative to the rotating shaft using a functional structure intentionally configured in each of the plug-type regulating bodies. It has been known.

However, in conventional examples of this type of technology, for example, the valve structure at the tip of the plug requires a complicated configuration for the adjustable function, or, for example, the inserted body of the plug is not relative to the shaft center. In the case of a device that is configured to be eccentric, the manufacturing procedure and cost can be said to be simpler, as it is necessary to manufacture the eccentric body part as a single plug-shaped adjustment body with precise precision. It wasn't.

An object of the present invention is to solve the above-mentioned problems by providing a plug-like adjustment body that is easily machined without requiring eccentric processing.

An embodiment of this invention will be explained with reference to drawings.A shaft 1 rotatably supported by a bearing (not shown) fixed to a machine frame of a sewing machine or the like has an oil supply hole 2 with a circular cross section along the shaft center opening at the left end. , a supply hole 3 is provided which communicates with the oil supply hole 2 and opens on the outer peripheral surface to supply lubricating oil to a desired location in the radial direction from the shaft center, and an adjustment body 4 fitted into the end of the oil supply hole 2 has an outer diameter. A shaft portion 5 having a diameter slightly smaller than the inner diameter of the oil supply hole 2 is formed coaxially with the head portion 4a, and an annular groove 9 is similarly provided at the base of the shaft portion 5.

A spring guide slot 10 is provided in the center of the tip side of the shaft portion 5, and a spring guide slot 10 is provided at one location on the circumference parallel to the spring guide hole 6.
When the elastic linear spring 8 is bent into a U-shape and each tip is inserted into the spring receiver hole 6 and the guide slot 10, the adjusting body shaft portion 5 is fitted into the oil supply hole 2 as shown in the figure. , the spring 8
pushes the shaft portion 5 to the opposite side inside the oil supply hole 2 with its elastic force.

An elastic backing 7 is installed in the annular groove 9 to liquid-tightly close the oil supply hole 2 at the north portion.

The force of the spring 8 is strong enough to overcome the elasticity of the backing 7 and bring the shaft portion 5 into line contact with the oil supply hole 2 on the opposite side of the guide slot 10, and the adjustment body 4 can be rotated with a screwdriver or the like. Set to value.

The material of the adjustment body 4 may be steel or resin such as Duracon (polyester copolymer).

Since this device has the above-mentioned configuration, as shown in FIG. When it is located near the opposite position to the supply hole 3, the gap between the shaft portion 5 and the oil supply hole 2 becomes maximum on the side of the supply hole 3, and the oil supply (oil sent to L2) is carried out by a pump (not shown) or the like. A large amount of oil is supplied from this gap to a desired location communicating with the supply hole 3 through the supply hole 3.

If the amount of oil in the supply hole 3 is too large in the above state, rotate the adjustment body 4 as shown in FIG. 2B and place it in a position where the contact line covers the supply hole 3. The gap between the shaft portion 5 and the supply hole 3 at the position where the hole 3 is formed is the smallest, and the substantial cross-sectional area of the flow path becomes extremely small, so that the supply of oil to the supply hole 3 is almost blocked.

Therefore, the amount of oil supplied can be finely adjusted by arranging the line of contact between the shaft portion 5 of the adjusting body 4 and the inner surface of the oil supply hole 3 at an appropriate position between A and B in FIG. 2 with respect to the supply hole 3. Can be done.

In the device of the present invention, the eccentricity of the adjusting body shaft in the oil supply hole is given by spring pressure, and therefore the structure of the shaft is pre-eccentric with respect to the adjusting body head. There is no need for manufacturing, the processing is easy, there is almost no variation in the oil supply adjustment amount of the device of the present invention, and the overall structure is simple.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the main parts of the present invention, and A and B in FIG. 2 are sectional views taken along line II-II' in FIG. 1: Rotating shaft, 2: Oil supply hole, 3: Supply hole, 4: Adjustment body, 5
: Shaft, 6: Spring bearing hole, 7: Packing, 8: Spring,
9: Annular groove, 10: Spring guide slot.

Claims (1)

[Scope of utility model registration request] It has an adjusting body that closes the opening of a rotary shaft having an oil supply hole that is coaxial with the axis and opens at one end, and by rotating the adjusting body relative to the rotary shaft, In an oil supply amount adjusting device that adjusts the amount of oil flowing to a supply hole that is opened for communication, the shaft portion of the adjustment body has a diameter smaller than the diameter of the oil supply hole, has an annular groove at its base, and has a spring holder at the center of its tip. The spring receiver has a hole and a spring guide slot on the circumference, a backing is installed in the annular groove, and the legs of the spring bent in a U shape are inserted into the hole and the spring guide slot. An oil supply amount adjusting device for a sewing machine or the like, characterized in that the shaft portion is fitted into the opening end of the oil supply hole while the spring is bent.