JPS58200801A - Oil pressure oscillator - Google Patents

Abstract

PURPOSE:To allow a reduction in length size by providing one or both of a fixed pressure chamber and an alternating pressure chamber in an oil pressure piston which is oscillated by means of pressure oil transferred and controlled by a spool. CONSTITUTION:When pressure oil is fed to a feed oil passage 35 through a connection port 33 from an oil pressure source, the pressure oil first enters the fixed pressure chamber 9 of a pilot valve 2 through a hole 9' and moves a spool 5 downward via an operation lever 7. The pressure oil also enters a fixed pressure chamber 23 through a feed oil port 15 and a communicating passage 27 and moves an oil pressure piston 4 upward. When a communicating passage 16 is communicated to the feed oil port 15 through a communicating chamber 20 during the upward movement of the piston 4, the pressure oil enters an alternating pressure chamber 10 through an oil passage 38 and moves the spool 5 downward. Then, the pressure oil is introduced into an alternating pressure chamber 24 through passages 11, 6, 12, 37, 22, 28 and moves the oil pressure piston 4 downward. By repeating the above operation, the oil pressure piston 4 is oscillated.

Description

Detailed Description of the Invention The present invention includes a spool that receives constant pressure and alternating pressure from both sides in a pilot valve, and a hydraulic piston that receives constant pressure and alternating LF force from both sides in a cylinder. The present invention relates to an improvement of a hydraulic oscillator that vibrates the hydraulic piston by the interaction of the hydraulic piston.

The applicant has been researching the hydraulic oscillator for some time and has already filed a patent application for some of the results. (Jitgansho ni'f-/79qlIt issue
) In such conventional hydraulic oscillators, a constant pressure chamber and an alternating pressure chamber that load constant pressure and alternating pressure on the hydraulic piston are formed by the spool portion of the hydraulic piston and the cylinder, so the overall length is long and the hydraulic oscillator is short. It was unsuitable for applications requiring machines.

The present invention aims to eliminate the above-mentioned drawbacks and provide a hydraulic oscillator with a short profile.

The hydraulic oscillator of the present invention generates hydraulic pressure by interacting with a spool that receives constant pressure and alternating pressure from both sides in a bilit valve and a hydraulic piston that receives constant pressure and alternating pressure from both sides in a cylinder. This is a hydraulic oscillator in which a piston is vibrated, and one or both of a constant pressure chamber and an alternating pressure chamber of a cylinder are provided inside the hydraulic piston.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The drawings are longitudinal cross-sectional views of the hydraulic oscillator of the present invention, in which both a constant pressure chamber and an alternating pressure chamber are formed inside the hydraulic piston (Fig. 1), and when only an alternating pressure chamber is formed (Fig. 1). 2 and 3) and an embodiment in which only a constant pressure chamber is formed (FIG. 9).

In FIG. 1, 1 is a hydraulic oscillator, which includes a pilot valve 1, a cylinder 3, and a hydraulic piston q. S is a spool that is slidably built into the bi-tight valve 2, and the base is a supply/discharge chamber consisting of an annular groove formed in the middle of the spool 3. 7 and g are a small-diameter operating rod and a large-diameter operating rod, respectively, which press both ends of the spool j. ri and io are a constant pressure chamber and an alternating pressure chamber, respectively, which introduce pressure oil into the end faces of the small-diameter operating rod 7 and the large-diameter operating rod t. Attach the bypass valve to the cylinder J. The wall is provided with an oil supply hole 1, a communication hole 1, and an oil drain hole 13, so that when the spool S moves downward, it passes through the oil supply and discharge chamber 6. The communication hole l is designed to communicate with the oil drain hole 13, and when the spool j moves upward, the oil supply hole // and the communication hole l communicate with each other via the supply and discharge chamber t. A cylindrical liner is installed between the cylinder 3 and the hydraulic piston.
A hydraulic piston is slidably fitted into the liner III. The liner lder is provided with an oil supply lower B near the lower open end, a communication port 16 and an oil discharge port 7 in the center, and a communication port 1g near the upper open end. -012
4-This is a communication chamber consisting of an annular groove formed in the spool part l of the hydraulic piston, and the oil filler port 13 and the communication port ttG4-Ti^ are respectively connected to the communication chamber koO and the communication chamber 1 to 1. When the hydraulic piston moves upward, the oil filler port /j and the communication port 16 communicate with each other through the connection hole 1. When the hydraulic piston moves downward, the communication chamber opens. The communication port 11 and the oil drain port 17 are designed to communicate with each other through the hydraulic piston.On the voltage side and the upper alternating pressure side of the hydraulic piston, there is a constant pressure chamber with a small pressure receiving area inside the hydraulic piston. λ3 and receiving F+:, 1Iiii
An alternating pressure chamber Koda with a large ridge is formed, and a small reaction force chamber 5 is formed to block each of the constant king force chamber Ko3 and the alternating pressure chamber Koda.
A hydraulic piston is slidably fitted to both the large reaction force roller and the large reaction force roller. Core, -t is communication chamber -〇 and constant pressure chamber-
13 and communication oil passages that communicate the communication chamber Koko and the alternating pressure chamber Koda, respectively. 9.30 is a brake chamber formed at the upper end of the constant pressure chamber-3 and at the lower end of the alternating pressure chamber-q. Reference numerals 3113 and 3113 are brake stepped portions formed in the small reaction force column J and the large reaction force column, respectively, and are designed to confine the removed oil that has entered the brake chambers D and 30, respectively. An oil supply pipe connection port 33 and an oil drain pipe connection port 3da are provided on the upper end surface of the cylinder 3. 3j is a supply oil passage, which connects the oil supply pipe connection port 33 to the constant pressure chamber of the pilot valve, the oil supply hole // and the liner /
It communicates with the fuel filler port/J of DA. 3t haha! - It is an oil outlet path, and the oil drain pipe connection port JQ is 4 m long between the oil drain hole 13 of the pilot valve and the oil drain port /7 of the liner /4I. 3
Reference numeral 7 denotes a piston operating oil passage, which communicates the communication hole 1 of the pilot valve 1 with the communication port 1K of the liner/'1.

3S is a spool operating oil passage, which communicates a hole lθ' communicating with the alternating pressure chamber IO of the pilet valve with a communication port l≦ of the liner 14I. Note that 3D is a side plate that is screwed onto the cylinder 3 and abuts the small reaction force koj or the large reaction force t. This is a communication hole that communicates with the atmosphere provided in the QOd side plate 3g. ! ! - In the figure, hydraulic oscillator/A is the seventh
The configuration of the constant pressure side is different from that of the hydraulic oscillator l shown in the figure, and a liner /<l'A consisting of a large diameter part and a small diameter part is provided, and the lower extension part 4'/ of the hydraulic piston lA is 2 in/<l'A. The spool part l of the hydraulic piston gear is slidably fitted into the large diameter part of the liner A, and the constant pressure 3A is the spool f of the hydraulic piston 4tA. ! 86t
q and liner/4fA, a brake chamber 19A is formed at the lower end of the stagnation pressure chamber 3A, and the supply oil passage 3
Oil supply port /jA that introduces pressure oil into the constant pressure chamber 13A from 3
is provided near the lower end of the constant pressure chamber KoJA, and the brake stepped portion 31m provided at the end of the spool portion 19 of the hydraulic piston A is designed to trap the removed oil that has entered the brake chamber Kota A). It is designed so that when the piston 4'A moves upward, the oil supply port /jA and the communication port /4 communicate with each other through the constant pressure chamber 23. In Figure 3, the hydraulic power source I
Machine M/E has a different configuration on the alternating pressure side from the hydraulic oscillator shown in Fig. 1, and has a large reaction force 4 consisting of a large diameter part and a small diameter part.
The large diameter part of the large reaction force roller B is fitted into the cylinder J, and the hydraulic piston B is slidably fitted into the small diameter part of the large reaction force roller AB. Toyonari Raina Tei B
is provided, and the extension part 41/ of the hydraulic piston/IB is liner/
The spool part l of the hydraulic piston D is slidably fitted into the small diameter part of the liner B, and the spool part l of the hydraulic piston D is slidably fitted into the large diameter part of the liner lada B. is formed, and the roaring communication chamber-Z/3 is constantly drained oil B336 through the oil drain hole/7B near the upper open end of the liner Lda B←26! ! Hydraulic piston II
In the inside of r, a, ′: pierced or fleas pressure chamber, 2 da is a communication oil passage-5B provided inside the large reaction force rod AB, and a bi-four valve valve via a piston operation oil passage 37. Communication hole t 4H
i, injection] rate front f raw ≠ ≠ dry communication, and the communication chamber I
A brake chamber 3 on is formed at the upper end of the total, and the hydraulic pressure and
Oil drain port at the spool part of Tonda B/? It is designed so that oil is trapped in the brake chamber SaS when B is blocked.1
．． When the hydraulic piston 11B moves downward and the spool portion of the #I hydraulic piston fE opens the communication port 1, the communication port 16 and the oil drain port 7B are designed to communicate through the communication chamber KO/B. ing. In Fig. 9, the hydraulic oscillation @IO has a different configuration on the alternating pressure side from the hydraulic oscillator l shown in Fig. 1, and has a liner/4to consisting of a large diameter part and a small diameter part, and Extension part Q is liner/4'O
The spool portions of the hydraulic piston O are slidably fitted into the large diameter portions of the liner C, respectively.
The alternating pressure chamber 41a is the spool portion l of the hydraulic piston qO.
A brake chamber, yoo, is formed at the upper end of the alternating pressure chamber 4to, and a communication port tgc is provided for supplying and discharging oil from the piston hydraulic oil passage 37 to the alternating pressure chamber λpo. A brake stepped portion 320 provided near the upper end of the alternating pressure chamber C and at the end of the spool 19 of the hydraulic piston 410 is designed to confine the removed oil that has entered the brake chamber 3OO.

Hydraulic oscillator 11/A of the present invention configured as above,
The /BS/C is installed in a civil engineering work machine or the like, and is used by connecting the oil supply pipe connection port 33 and the oil drain pipe connection port 3 of the cylinder 3 to a hydraulic power source, a tank, etc. (not shown), respectively. Therefore, when pressure oil is supplied from the hydraulic source to the oil supply line 33 through the oil supply pipe connection port 3J, the pressure oil is introduced into the constant pressure chamber 2 of the pilot valve through the hole ', and in the pi-four valve. As the spool j moves downward through the small-diameter operating rod 7, pressure oil is introduced into the constant pressure chamber 3 via the oil supply tank 20, the communication chamber 20, and the communication channel 3, and in the cylinder J, the hydraulic piston JAS evening, spo starts moving upwards. At this time, the alternating pressure chambers in the cylinder 3 (Fig. 1, 1, 3) and 410 (Fig. 9) are connected to the communication oil passage g, the communication chamber here, and the communication port /f (7th
(Fig. 1, Fig. 1) or communication oil passage fB (Fig. 3) or communication port t to (Fig. 119).
7, communication hole 1, supply/discharge chamber 6, oil drain hole 13, drain oil path Jt
It also communicates with a tank (not shown) via an oil drain pipe connection 03.

Next, the upper ports 11 of the hydraulic pistons $, 4'A, 41B, and QO communicate with the oil supply port tJ (Figs. When communicating with Jk (Fig. 2, Fig. 3), the pressure oil supplied to the oil filler port /A, ljk is connected to the communication chamber 20 (Fig. 1, Fig. 4I).
The oil is introduced into the alternating pressure chamber 10 of the pilot valve through the communication port 4, the spool operating oil passage 3g, and the hole 10' via the constant pressure system 3A (see Figures 2 and 3). Since the pressure receiving area of the large diameter working rod j is larger than the pressure receiving area of the small diameter working rod 7, the large diameter working rod t overcomes the pressing force of the small diameter working rod 7 and moves the spool S upward. . When the spool S moves upward, the oil supply hole /l and the communication hole I communicate with each other via the supply and discharge chamber ≦, and the pressure oil supplied to the oil supply hole IT is transferred to the supply and discharge chamber 4, the communication hole L-, and the piston. A communication port It from the operating oil passage 37.

The communication chamber 1 is introduced into the alternating pressure chamber 1 via the communication oil passage J (Fig. 1, Fig. 1) or the □ passage 2t before communication.
It is introduced into the alternating pressure chamber moss via B (Fig. 3) or into the alternating pressure chamber moss O via the communication port 1tcJ (Fig. 4!). The pressure-receiving area of the alternating pressure chamber # (the hydraulic piston in the first place, Dim, 4!B%) is a constant pressure chamber,?
(Fig. 87, Fig. d), 23A (Fig. 2, Fig. 3) is larger than the pressure receiving area of the hydraulic piston, FA, FB, IC, so that the hydraulic piston,
EB, $0 starts moving downward. Next, in the process of downward movement of the hydraulic piston q14' A-, 4' B%daC, the communication port 16 and the oil drain hole 1 communicate with each other via the communication chamber 1 (see Fig. 1, Fig. 1). Figure 2, Figure DA)
Or the communication port l''6 and the oil drain port/?Il is the communication chamber-/B
(Fig. 3), the pressure oil in the alternating pressure chamber la of the valve is connected to the hole lθ', the spool operating oil passage 3g, the communication lo/A, and the 7th communication Figure 1, Figure 1, Figure 9), 21B (Figure 3), Oil drain port/71 (Figure 1, Figure 2, Figure 9), / ? B (Fig. 3), drain oil path 3
6 and a drain pipe connection port 3f to a tank (not shown), and the pressure inside the alternating pressure chamber 10 decreases, so the spool S is pressed by the small diameter operating rod and moves downward. As a result, the 1st alternating pressure chambers Koda (Figures 1, 2, and 3) and -DaC (Figure Oda) are communicated with a tank not shown, as described above, and the alternating pressure chambers ¥-2Da are connected to the tank (not shown) as described above. , the pressure inside the 4IO decreases, so the hydraulic bistoning, q people, da B1
Hiro0 is pressed by the pressure oil in the constant pressure chamber Koj, -t3A and moves upward. Hydraulic piston da, game, 4! B,
4'0 moves downward, and the brake step part 3t (Fig. i, Fig. 7) 1.7/A (Fig. When the oil enters the brake chamber (FIGS. 1 and 3), the oil is sealed in the brake chamber and produces a braking action. Similarly, hydraulic piston cylinder, 4
'1, Q B% da C moves upward to form three brake step portions (Fig. 1, Fig. 1) and is enclosed within the yoa to produce a braking action. Crystal book.

The above operation is repeated, and the spool j in the bylet valve λ
and the hydraulic piston 4 in the cylinder 3 (,4tA.

Hydraulic piston da, # by interaction with IIB, da C
A, 4'BS+O can be made to vibrate.

As can be easily understood from the above description, the hydraulic power generator tM411 of the present invention has very few sliding parts, and the first
As shown in Figure 7, the small reaction force rod and the large reaction force rod that fit into the hydraulic piston do not necessarily have to be the same as the hydraulic piston, and are easy to process. Also No. 11. - shown in T 1lli
The pressure oscillator is useful as a small-sized vibration source, and also
2)) The hydraulic oscillator shown in Figure 3 is located at the tip of the hydraulic piston.
By attaching a compaction plate, etc. to the machine, it is useful as a small-sized vibrating work machine.

[Brief explanation of the drawing]

The figure shows an embodiment of the hydraulic oscillator of the present invention.
The figure is a vertical cross-sectional view when both a constant pressure chamber and an alternating pressure chamber are formed inside the hydraulic piston, Figures 2 and 3 are a longitudinal sectional view when only an alternating pressure chamber is formed, and Figure ψ is a constant pressure chamber. The figure shows the actual mN in the case of forming only 1. l-hydraulic oscillator, co-pillet valve, 3-cylinder,
DA...Hydraulic piston, j...Spool, 6--supply/discharge chamber, 7--small diameter operating rod, g-large diameter operating rod, 9-constant pressure chamber, 10-alternating pressure chamber, ll-lubrication hole , /, 2-・Communication hole, /, 3-・Oil drain hole, /4I-・Liner, Noj・-Oil filler port, //i-・Communication port, 17・-Oil drain port, tg-・Communication Mouth, lter... Spool part, ko O, j/, 1 here...
Communication chamber, ko3... constant pressure chamber, koda... alternating fE force chamber, koj - small reaction force 1.26... large reaction force 1.27, -
g...Communication oil passage, 9.30--Brake chamber, 3/,
, 3-brake stepped part, J3-oil supply W connection port, 3-gauge oil drain pipe connection port, jjP-supply oil path, J4-discharge oil path,
37-Piston operating oil F (S, JK-Spool operating oil passage, 39-Side plate, tIo series of holes, da/, tlco extension designated agent Japanese state-owned Da5 Dokenya Office Legal Affairs Division Akiba University) Capital 11th sword rod 2 +”A 3rd 1'Zl

Claims (1)

[Claims] (1) The hydraulic piston is activated by the interaction between a spool that receives constant pressure and alternating pressure from both sides in the pilot valve and a hydraulic piston that receives constant pressure and alternating pressure from both sides in the cylinder. In a hydraulic oscillator configured to vibrate, a constant pressure chamber and an alternating pressure chamber for applying a constant pressure and an alternating pressure to the hydraulic piston are respectively provided inside the hydraulic piston.G-17.
. A hydraulic oscillator characterized in that each of a constant pressure chamber and an alternating pressure chamber is closed by a small pressure chamber slidably fitted to the hydraulic piston. (j) The hydraulic piston is activated by the interaction between the spool, which receives constant pressure and alternating pressure from both sides in the pilot valve, and the hydraulic piston, which receives constant pressure and alternating pressure from both sides in the cylinder. In a hydraulic oscillator configured to vibrate, one of a constant pressure chamber and an alternating pressure chamber for applying constant pressure and alternating pressure to the hydraulic piston is formed by the spool portion of the hydraulic piston and the cylinder, and the other is formed by the hydraulic piston. A hydraulic oscillator characterized in that a small reaction force rod or a large reaction force bar is installed inside the hydraulic oscillator.