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Pressure limiting devices especially for hydraulic auxiliary systems of vehicles

A device, pressure technology, applied in the field of dealing with overpressure in hydraulic circuits

Inactive Publication Date: 2019-11-19
POCLAIN HYDRAULICS IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, a pressure limiter is eliminated, but a circuit selector valve 25 must be added

Method used

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  • Pressure limiting devices especially for hydraulic auxiliary systems of vehicles
  • Pressure limiting devices especially for hydraulic auxiliary systems of vehicles
  • Pressure limiting devices especially for hydraulic auxiliary systems of vehicles

Examples

Experimental program
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Embodiment Construction

[0048] Figure 4 The auxiliary system according to the present invention is shown, the auxiliary system combines the pressure reducing device 40 according to the invention, and the pressure reducing device 40 combines the two one-way valves B11 and B12 shown in FIGS. 1 to 3 And two pressure limiters 21 and 22 or 23, 24 or 25, 26 devices with the same function. The device 40 includes three ports 42, 44, 46: two ports 42, 44 communicate with the supply pipelines 11 and 12, respectively, and one port 46 communicates with the booster pipelines 10, 30.

[0049] Figure 5 The following figures show the structure and operation of four variant forms of the assembly 40 according to the present invention, which will be described below.

[0050] Such as Figure 5 to 10 As shown, the first variant form of the pressure reducing device 40 basically includes a main body 110, a selector valve 120 and a central element 130. The selector valve 120 forms two one-way valves, and the central element 130...

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Abstract

The invention relates to a pressure-limiting device designed to be installed in a system comprising a first line (11) and a second line (12) that can comprise pressurised oil, as well as comprising a discharge and / or booster line (10). The limiting device is characterised in that it comprises means (131, 132, 133, 134) forming two valves, each associated with one of the two lines and adapted to open in the event of an overpressure above a pre-determined threshold on the associated line, so as to discharge the corresponding overpressure towards the discharge and / or booster line, said two valves comprising a common support stem (126) that operates in traction under the action of at least one spring defining a pressure corresponding to the pre-determined threshold. The invention also relates to a hydraulic assist system and to a vehicle comprising such a device.

Description

Technical field [0001] The present invention relates to handling overpressure in hydraulic circuits, and more specifically to "pressure limiter" or "pressure reducing valve" type equipment. [0002] The invention is particularly applicable to the hydraulic auxiliary circuit of a vehicle. [0003] A hydraulic machine is generally used for hydraulic assistance, which can supply torque to wheels or supporting wheels that are not motorized due to mechanical transmission. These hydraulic machines convert the hydraulic energy of pressurized oil into mechanical energy, or convert mechanical energy into hydraulic energy. Background technique [0004] Figure 1 shows a hydraulic schematic diagram of the prior art. In the vehicle, the first hydraulic machine M1 is installed on a first shaft (for example, the front axle), and the second hydraulic machine M2 is installed on a second shaft (for example, the rear axle). A hydraulic press refers to a device that can function as a motor or as a pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/4017F16H61/4078
CPCF15B13/024F15B2211/50527F16H61/4017F16H61/4078F16K17/26
Inventor A·博齐克L·彼得内尔A·赛利克
Owner POCLAIN HYDRAULICS IND