JPS60175824A - Rotary joint - Google Patents

Abstract

PURPOSE:To prevent scuffing caused between a shaft and a casing and facilitate their processing, by forming the shaft and the casing by spherical graphite cast iron and both leaving duct lines as previously provided when the shaft is cast and providing a resin-state interposed material in a contact part of the shaft with the casing. CONSTITUTION:This rotary joint forms its shaft 1 by spherical graphite cast iron, and the shaft 1, when it is cast, previously provides duct lines 2, 3, 4. While the shaft provides in its position nearest the casing cloth-contained wearings 14, 15 made of phenol resin, being fitted into a groove provided in the casing and placed in a bearing condition, so that the shaft may be prevented from being directly brought into contact with the casing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a saving joint that is used in a part of a hydraulic circuit that particularly requires rotation, and is capable of rotating freely and at an indefinite speed and direction.

7!゛[From then on, rj-Tari Nokoindo (14) / Yaft and outside of it separately rotate i'
PI materials, such as 545C, which is a carbon steel preparation for building shafts, or steels such as 86M435, which is chrome molybdenum steel + 2, are used for making shafts.
(For Goonong, F C is a spheroidal graphite cast iron product.
D 45 father was made using F CD 55.

The reason for this is to create a difference in hardness at the contact area between the shaft and the casing to prevent mechanical galling, and the outer periphery of the shaft is heat treated by induction hardening, making it possible to use extremely hard metal. was creating an organization. Therefore, even if the shaft is filled with oil, it is a mechanical processing method using a cutting tool using a deep hole drill or a gun drill, which requires a large amount of cost.

In the rotary joint of the present invention, the shaft also uses spheroidal graphite cast iron made of the same 44 material as Chi-Nong,
A conduit is provided in the construction pasting. A shirt that causes problematic mechanical galling! The solution is to provide a resinous inclusion so that the contact area between the casing and the casing does not come into direct contact, and the manufacturing cost is extremely low.

(i(=) is an attempt to provide an inexpensive rotary joint.

The rotary joint according to the present invention will be explained with reference to FIG. 1 (11).

The drawing shows a partially cut away perspective view 1 of the rotary joint.

The drawing uses a five-circuit rotary joint as an embodiment.

A boat 5.6.7 made of a spherical black 211 cast iron shaft 1 with a conduit 234 installed during casting and a mechanically applied boat 5.6.7, and a boat 9, 70 made of a casing 8 with a mechanically applied load.
．． 11. , are each a hydraulic circuit.
4. Each circuit is independent with an O-ring 12.13. which seals the communication between the pipes into a pressure curve. The other circuits have the same structure and form 414 independent circuits.

] - The part where the toft and the casing come closest is limited to one end of the casing (= near the J), so place a wear ring 1415 made of phenolic resin in the groove provided in the casing. The flange 16 is installed in a bearing state so that the shaft does not come into direct contact with the casing.The flange 16 is integrally cast with the shaft, making it easier to create a shape with a 1. 7!I
This made it stronger and lighter. Also several holes 17
Since it can be opened in the shape of a gun, the number of man-hours required for machining can also be saved.

Since the open end 18 of the pipe line 2 is open to facilitate sand removal during casting, this part (in terms of hydraulic circuit) must be sealed. Therefore, the recess 2 of the thrust metal 19
Insert the 0G O-ring 21, bolt the Nulast Metal to the shaft, and crush the O-ring by about 20%.

In the embodiment, pipe 2 has a diameter of 20, pipe 3 has a diameter of 14, and the O-rings at the ends are JIS IBG, 20 and IBG1, respectively.
It is 4.

The cover 22 is fixed to the casing with four bolts 23, and the upper side of the thrust metal can support the lower side of the cover, and the lower side of the thrust metal can support the casing as a load in the thrust direction.

Whether the gauging should be rotated or stopped can be determined by linking it to the surrounding area using the bracket 24 and drilled bottle hole 25.

The rotary joint of the present invention can be 30% lighter in weight compared to conventional ones, and the number of machines can be reduced by 50%.
It can be reduced. In addition, since there are no welding parts, considerations for safety and health, placement of special skills, preheating for welding 11, post-heating heat (fH: JIIj), equipment, work place, etc. were also small. Deep hole drilling 1: Since the pipeline was sealed with plug welding, there was a lot of oil leaking from that part, which resulted in poor yields, but deep hole drilling 1: was eliminated II-
The reliability has been improved, and the product can be manufactured without the need for large equipment such as gun drills required for deep hole drilling.

Among them, the biggest effect is automatic addition 1: and J that can be assembled automatically.
It is a ``FII-built'' JF, and has the excellent effects of being able to provide an inexpensive 1) - crease joint.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention, and is a partially cut away oblique IA view for the sake of explanation. 1: N-)・Fut 2: Pipeline 3: Pipeline 4: Pipeline 5
: Boat 6: Boat Go Boat 8: Casing Q: = l Me 1.10: H Me - 1, ll:: I Meat 12: 0 Ring 13: O-ring 14: Wear ring 15: Wear ring 16: Flange 17: Take-out J hole 18: Open end 19 Varnished metal 20: Concave part
21: O-ring 22: Cover 23 = Bolt 24 Nibracket 25: Pin hole patent applicant Hideo Kawahara Representative of Takasaki Yakin Kogyo Co., Ltd.

Claims (2)

[Claims] (1) Use a shaft with an 'iR' path 2 provided during casting or a tally joint. (2) One coater joint where the open end of the pipe is sealed by fitting it into an O-ring.