JPH04109486U - Pressure oil supply device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent a flow sensor from malfunctioning when an emergency hydraulic pump is driven, and to simplify piping. [Configuration] Main hydraulic pump 1 main body 20 and piping block 2
1, and the first, second, and third
A T-shaped oil hole 22 is formed with ports 23, 24, and 25, the first port 23 is connected to the suction pipe 6 of the main hydraulic pump 1, and the second port 24 is connected to the suction port 2 of the main body 20.
6, and the suction line 8 of the emergency hydraulic pump was connected to the third port 25, and the float sensor 7 was attached to the piping block 21 so that its disk 11 could swing freely toward the second port 24. thing.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a pressurized oil supply that supplies pressurized oil to actuators such as steering cylinders. Regarding the feeding device.

0002

[Conventional technology]

A pressure oil supply device as shown in FIG. 1 is known. In other words, the discharge of the main hydraulic pump 1 The outlet pipe 2 and the discharge pipe 4 of the emergency hydraulic pump 3 are connected to the inlet side of the operating valve 5, and the main A flow sensor 7 is provided in the suction pipe 6 of the hydraulic pump 1, and the flow sensor The suction pipe 8 of the emergency hydraulic pump 3 is connected to the downstream side of the main hydraulic pump 1. The flow sensor 7 detects this and drives the electric motor 9 to operate the emergency hydraulic pump. 3, pressure oil is supplied to the operating valve 5. With such a pressure oil supply device, when the emergency hydraulic pump 3 is driven, the flow sensor 7 may operate, so as shown in Figure 2, the emergency hydraulic pump 3 should be A conduit 8 is connected to the upstream side of the flow sensor 7.

0003

[Problem that the idea aims to solve]

However, the flow sensor 7 has a disk 11 in the main body 10, as shown in FIG. is swingably supported by a pin 12, and a reed switch 13 is attached to the base of the disk 11. A magnet 14 facing the reed switch 13 is provided, and the magnet 14 is connected to the reed switch 13. It has a structure in which the disk 11 is biased to swing by a spring 15 so as to be in contact with each other. With the tip of the disc 11 facing the suction pipe 6, the disc 1 is 1 against the spring 15 to separate the magnet 14 from the reed switch 13. When the pressure oil flow slowly or stops, the disk 11 swings by the spring 15. Since the magnet 14 is in contact with the reed switch 13, the above-mentioned The suction pipe line 8 of the emergency hydraulic pump 3 will be connected to the suction pipe line 6 as shown in FIG. Piping becomes complicated.

0004 Therefore, the present invention provides a pressure oil supply device that can solve the above-mentioned problems. The purpose is to

[Means to solve the problem]

A piping block with 1st, 2nd, and 3rd ports and a T-shaped oil hole. Attaches to the main hydraulic pump body and connects the main hydraulic pump's suction pipe to its first port. Connect the second port to the suction port of the main unit, and connect the emergency hydraulic pump to the third port. Connect the suction line and attach the float sensor to the piping block with its disk at the second port. It is installed so that it can swing freely toward the seat.

[Effect]

Piping can be done by connecting the suction pipe to the piping block, and the emergency hydraulic pump supplies oil. During suction, pressure oil flows from the first port to the third port, causing the float sensor to disturb. You can prevent the screen from shaking.

[0005]

【Example】

As shown in FIGS. 4 and 5, a piping block 21 is attached to the main body 20 of the main hydraulic pump 1. At the same time, the flow sensor 7 is attached to this piping block 21, and the suction pipe line 6 and A suction pipe 8 is connected thereto. The piping block 21 has a T-shaped oil hole 22 as shown in FIG. 3, a second port 24, and a third port 25, and the suction pipe 6 is connected to the first port 23. Subsequently, the second port 24 is connected to the suction port 26 of the main hydraulic port 1, and the third port 24 is connected to the suction port 26 of the main hydraulic port 1. 25 is connected to the suction pipe line 8, and the disk 11 of the flow sensor 7 is connected to the second port. 24 and swings toward the second port 24 side to turn ON and OFF. , the first and second ports 23 and 25 are prevented from swinging.

[0006] Next, the operation will be explained. When the main hydraulic pump 1 is sucking pressure oil, the first port 23 is connected to the second port. Since the pressure oil flows in the direction of the arrow toward the port 24, the disk 11 of the flow sensor 7 It swings due to the flow of pressure oil and turns OFF. If the main hydraulic pump 1 breaks down, the flow of pressure oil in the direction of the arrow will stop, so the flow The disk 11 of the sensor 7 returns and turns ON, and the ON signal drives the electric motor 9. the emergency hydraulic pump 8 to suck in pressure oil. At this time, the pressure oil flows from the first port 23 to the third port 25, so the flow The disk 11 of the sensor 7 does not swing and the flow sensor 7 does not turn off.

[0007]

[Effect of the idea]

Since each suction pipe line 6, 8 only needs to be connected to the piping block 21, piping is easy. However, when sucking pressure oil from the suction pipe 8 of the emergency hydraulic pump 3, a float sensor is used. The disk 11 of the sensor 7 does not swing and does not malfunction.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a pressure oil supply device.

FIG. 2 is a circuit diagram of a pressure oil supply device.

FIG. 3 is a cross-sectional view of the flow sensor.

FIG. 4 is a circuit diagram of a pressure oil supply device.

FIG. 5 is a front view of the piping block attachment part.

FIG. 6 is a cross-sectional front view of the piping block attachment part.

[Explanation of symbols]

1 Main hydraulic pump, 2 Discharge pipe, 3 Emergency hydraulic pump, 4 Discharge pipe, 5 Operation valve, 6 Suction pipe, 7 Flow sensor, 8 Suction pipe, 9 Electric motor, 11 Disk, 20 Main body, 21 Piping block, 22 Oil hole, 2
3 1st port, 24 2nd port, 25 3rd port, 26 suction port.

Claims (1)

[Scope of utility model registration request] 1. A discharge pipe 2 of a main hydraulic pump 1 and a discharge pipe 4 of an emergency hydraulic pump 3 driven by an electric motor 9 are connected to the inlet side of an operation valve 5, and a main body of the main hydraulic pump 1 is connected. A piping block 21 having a T-shaped oil hole 22 with first, second, and third ports 23 , 24 , and 25 is attached to 20 , and the suction pipe 6 of the main hydraulic pump 1 is connected to the first port 23 .
, the second port 24 is connected to the suction port 26 of the main hydraulic pump 1, and the third port 25 is connected to the emergency hydraulic pump 3.
A pressure oil supply device characterized in that a suction pipe line 8 is connected to the piping block 21, and a float sensor 7 is attached to the piping block 21 so that its disk 11 can swing freely toward the second port 24.