JPH0572334U - Fluid pressure remote control device for machine tools - Google Patents

Abstract

(57) [Summary] [Purpose] Not only does the dedicated manifold on the front side of the machine frame be unnecessary to configure the entire system at low cost, but also a flexible and flexible shaft that is thin and easy to bend is used for piping work between the adjustment knob and the pressure reducing valve. To facilitate. [Structure] A hydraulic unit 2 is installed at a rear portion of a machine frame 1 of a lathe, and a valve system 5 including a central manifold 3, a pressure reducing valve 7, a direction control piece 8 and the like is arranged on the hydraulic unit 2. An adjusting knob 11 for adjusting the set pressure of the pressure reducing valve 7 and a pressure gauge 12 for displaying the set pressure are provided at positions close to the front cover of the machine frame 1. The adjusting knob 11 is connected to the pressure reducing valve 7 via the flexible shaft 14. The pressure gauge 12 is connected to the pressure reducing valve 7 via a thin and flexible hose 19.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a device for remotely adjusting hydraulic pressure or pneumatic pressure used in machine tools, in particular, a fluid pressure unit equipped with a fluid pressure unit at the rear of the machine frame and a pressure adjusting knob on the front side of the machine frame. The present invention relates to a remote control device.

[0002]

[Prior Art]

 Generally, the gripping force of the chuck on the lathe and the tailing force of the tailstock are controlled by adjusting the hydraulic pressure.However, in recent machines, the adjustment knob is used to facilitate the adjustment operation by the operator. It is considered to be installed on the front side of the machine frame. On the other hand, the hydraulic unit including the hydraulic pump and the tank that constitute the hydraulic power source is usually installed in the rear part of the machine frame, which is advantageous in terms of space.

FIGS. 3 and 4 show a conventional device of this type. In FIG. 3, 1 is a machine frame of a lathe, 2 is a hydraulic unit installed at the rear of the machine frame 1, and 3 is a hydraulic unit on the hydraulic unit 2. The centralized manifold 4 provided is a front cover of the machine casing 1, and 5 is a valve system provided close to the front cover 4. The valve system 5 includes a dedicated manifold 6 connected to a chuck cylinder (not shown), a pressure reducing valve 7, and the like. The dedicated manifold 6 is connected to the central manifold 3 via a pump-side hose 9 and a tank-side hose 10. The pressure reducing valve 7 is provided with an adjusting knob 11, and the supply pressure to the chuck cylinder can be adjusted by manually operating the adjusting knob 11.

Further, conventionally, a technique has been proposed in which an electromagnetic proportional control valve is incorporated in a hydraulic system, and the hydraulic pressure is automatically controlled by driving this with an electric signal from a control device.

[0005]

[Problems to be solved by the device]

 However, according to the conventional devices shown in FIGS. 3 and 4, not only the dedicated manifold 6 needs to be provided on the front side of the machine casing 1 but not only the cost increases, but also between the hydraulic unit 2 and the valve system 5. In addition, it was troublesome that two relatively large hoses 9 and 10 had to be piped. In addition, when the solenoid proportional control valve is used, there is a problem that the electric control system becomes complicated and the cost of the entire device becomes high. Therefore, an object of this invention is to provide a fluid pressure remote control device which can be easily piped and can be constructed at low cost.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the operating device of the present invention installs a fluid pressure unit in the machine frame of a machine tool, and a valve system including a pressure reducing valve in the vicinity of the fluid pressure unit. The operator side of the remote machine frame is provided with an adjustment knob, and the adjustment knob is connected to the pressure reducing valve via a flexible shaft.

[0007]

[Action]

 In the operating device of this invention, the operator manually operates the adjusting knob of the machine frame to adjust the set pressure of the pressure reducing valve via the flexible shaft. Since the pressure reducing valve is installed in the rear part of the machine frame, a dedicated manifold on the front side of the machine frame is not required, and the entire device can be inexpensively constructed with few parts. Further, since the flexible shaft which is thin and easy to bend is used, the piping work between the adjusting knob and the pressure reducing valve becomes easy.

[0008]

【Example】

 An embodiment embodying the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 1 is a machine frame of a lathe, 2 is a hydraulic unit installed at the rear of the machine frame 1, and 5 is a valve system arranged on the hydraulic unit 2. The valve system 5 is composed of a central manifold 3 connected to each part of a lathe including a chuck cylinder, a pressure reducing valve 7, a direction switching valve 8 and the like. Reference numeral 4 denotes a front cover of the machine frame 1. At a position close to the front cover 4, an adjusting knob 11 for adjusting the set pressure of the pressure reducing valve 7 and a pressure gauge 12 for displaying the set pressure are provided on a support plate. It is attached via 13.

The adjusting knob 11 is connected to the pressure reducing valve 7 via a flexible shaft 14. As shown in FIG. 2, the flexible shaft 14 is configured such that the wire 16 is rotatably inserted inside the protective tube 15 and is bendable, and one end of the wire 16 is connected to the output shaft 17 of the adjusting knob 11 and the other end thereof. Are connected to the input shafts 18 of the pressure reducing valve 7, respectively. The pressure gauge 12 is connected to the pressure reducing valve 7 via a hose 19 which is relatively thin and easily bent. A commercially available product can be used for the pressure reducing valve 7 and the flexible shaft 14.

In the hydraulic remote operation device of this embodiment configured as described above, the operator manually operates the adjusting knob 11 on the front side of the machine frame 1 to operate the pressure reducing valve 7 via the flexible shaft 14. The set pressure is adjusted, and the set pressure is displayed on the pressure gauge 12. Therefore, the operator can easily adjust the hydraulic pressure of the chuck cylinder or the like on the front surface side of the machine casing 1 separated from the hydraulic unit 2 installed at the rear portion of the machine casing 1. In particular, since the pressure reducing valve 7 is disposed at the rear portion of the machine frame 1, a dedicated manifold as in the conventional case is unnecessary, and the entire apparatus can be constructed at low cost with a small number of parts. Further, since the flexible shaft 14 and the hose 19 which are thin and easy to bend are used, the piping work between the adjusting knob 11 and the pressure gauge 12 and the pressure reducing valve 7 becomes very easy.

The present invention is not limited to the above-described embodiment, and is applied to, for example, a remote operation device for pneumatic pressure adjustment, various machine tools other than a lathe, and a vertical type. This machine tool has a fluid pressure unit installed on the lower side of the machine frame, and for machine tools where the operator's operating position is on the left and right side surfaces or the top surface, an adjustment knob may be installed on the operator side. The shape and configuration of each part can be appropriately modified and embodied without departing from the spirit of the invention.

[0012]

[Effect of the device]

 As described in detail above, according to the present invention, the adjustment knob on the machine frame operator side, which is separated from the hydraulic unit, is connected to the pressure reducing valve at the rear of the machine frame via the flexible shaft. This has the excellent effect that the entire device can be constructed inexpensively without the need for a dedicated manifold, and that the flexible shaft that is thin and easy to bend facilitates piping work.

[Brief description of drawings]

FIG. 1 is a layout view of a hydraulic remote control device in a lathe according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the hydraulic remote control device of FIG.

FIG. 3 is a layout view of a hydraulic remote control device in a conventional lathe.

FIG. 4 is an enlarged view of a main part of FIG.

[Explanation of symbols]

1 ... Machine frame, 2 ... Hydraulic unit, 3 ... Centralized manifold, 4 ... Front cover, 5 ... Valve system, 7 ...
Pressure reducing valve, 8 ... Direction switching valve, 11 ... Adjusting knob, 12
..Pressure gauges, 13 ... Support plates, 14 ... Flexible shafts, 15 ... Protective tubes, 16 ... Wires, 17
..Output shafts, 18 ... Input shafts, 19 ... Hose

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Keizo Yamakawa 1-5-25 Shimokoguchi, Oguchi-cho, Niwa-gun, Aichi Okuma Co., Ltd. Oguchi Plant

Claims (1)

[Scope of utility model registration request] 1. A fluid pressure unit is installed in a machine frame of a machine tool, a valve system including a pressure reducing valve is arranged in the vicinity of the fluid pressure unit, and an adjustment knob is provided on the operator side of the machine frame, and an adjustment knob is provided. Is connected to a pressure reducing valve via a flexible shaft, and a fluid pressure remote control device in a machine tool is characterized.