DE102005037510A1 - Tube connection for hydraulic components, e.g. a hydraulic pump in a gearbox, has drillings of different diameters to take the tube ends with the hydraulic pressure towards the smaller drilling - Google Patents

Abstract

The tube connection for hydraulic components, e.g. with a hydraulic pump (1) on an elastic mounting in a gearbox (2), has a tube (3) with its ends (4,11) inserted into drillings (5,10) of different diameters (8,9) to allow for movement between the pump and the gearbox. The hydraulic pressure within the tube is directed towards the tube end in the drilling (5) with the smaller diameter (8).

Description

The The invention relates to a pipe joint according to the preamble of claim 1 closer defined type.

hydraulic Components such as pumps are often used in transmission housings via elastic Elements attached. The pressure medium supply to these hydraulic Components are often via hoses, since these tubes follow the movements of the hydraulic components. Reliable hoses are very expensive.

The EP 0 797 040 B1 discloses a pipe joint which connects two components, wherein the components are movable in a certain angular range to each other. For this purpose, the pipe connection to a tube which is formed spherically at its ends and arranged in a component provided with sealing means. In order to prevent slipping out of these components, additional spherical rings are arranged, which are held by retaining rings. This embodiment of a pipe connection is also very expensive.

Of the present invention is based on the object, a pipe connection to create which two mutually movably arranged components liquid-tight connects and inexpensive accomplished can be.

The Task is with a, even the characterizing features of the main claim having, generic pipe connection solved.

According to the invention the pipe joint is a pipe having a first end and a second end on. In the region of these ends are sealing means, preferably O-rings, arranged. The two movably arranged components are provided with holes, with the first end in the first component inserted and the second end in the second component plugged is. The diameters of the two ends of the tube, and thus also the holes are made different sizes. The hole in which the end with the smaller diameter is plugged in as Stepped bore, whereby the tube rest with its end face and in axial Direction to the plant can come. When pressurizing the pipe the pipe is going through the different diameter in the direction of the smaller diameter and comes in the stepped bore to the plant. This will be at pressure pulsations in the hydraulic component, the pipe, and in particular the sealing means, not damaged, because the tube can not perform any oscillating movement.

In Another embodiment of the invention are the two Ends of the tube in the area of the sealant are made spherical a defined path of movement between the first component and the second component to allow. However, there is also the possibility to make the diameter of the pipe to the holes so that between Sufficient clearance is created at the end of the pipe and the hole the liquid-tight version exclusively over the Sealant takes place.

In Another embodiment of the invention is between a the components and the corresponding end of the tube a spring element arranged, whereby the tube also on the opposite contact surface a stepped bore is pressed in the component and thereby the pulsation forces of superimposed on the spring force be guaranteed and thus is that the tube does not perform any oscillating movements. at Using a spring element may be the first end of the tube and the second end of the tube should be made with the same diameter.

Further Features are shown in the figure description.

The single figure shows a section of a hydraulic pump 1 which are elastic, as in the EP 1 196 699 B1 in a gearbox 2 is arranged. The pipe connection has a pipe 3 on, which with its first end 4 in a hole 5 in the first component 1 is arranged. The hole 5 is designed as a stepped bore and has a contact surface 6 on, at which the end 7 of the pipe 3 is applied. The diameter 8th the bore 5 is smaller than the diameter 9 the bore 10 , The second end 11 of the pipe 3 is in the hole 10 arranged. The hole 10 is in the second component 2 arranged. The first end 4 and the second end 11 of the pipe 3 are spherically formed, whereby a relative movement between the first component 1 and the second component 2 is possible. Is the interior 12 of the pipe 3 filled with pressure medium and pressurized, so acts through the different diameter of the bore 5 and the hole 10 a force along the pipe 3 on the contact surface 6 whereby the tube can not perform any oscillating movements caused by pressure pulsations.

Since only a simple-to-produce tube and two holes are necessary for the preparation of the pipe connection is through the pipe Connection created a cost-effective, reliable connection for the pressure medium.

1

hydraulic pump

2

gearbox

3

pipe

4

first The End

5

drilling

6

contact surface

7

The End

8th

diameter

9

diameter

10

drilling

11

second The End

12

inner space

Claims (7)

Pipe connection with a pipe ( 3 ), with a first end ( 4 ), which in a bore ( 5 ) of a first component ( 1 ), and a second end ( 11 ), which in a second component ( 2 ), wherein the first component ( 1 ) with the second component ( 2 ) is connected via elastic elements, the first end ( 4 ) and the second end ( 11 ) are formed so that movements between the first component ( 1 ) and the second component ( 2 ) are possible, characterized in that the diameter ( 8th ) of the first bore ( 5 ) and the diameter ( 9 ) of the second bore ( 10 ) are of different sizes, whereby upon pressurization of the tube ( 3 ) this in the direction of the smaller diameter ( 8th ) is pressed. Pipe connection according to claim 1, characterized in that in the region of the first end ( 4 ) and in the area of the second end ( 11 ) Sealing means, in particular O-rings, are arranged. Pipe connection according to claim 1, characterized in that in the region of the first end ( 4 ) and in the area of the second end ( 11 ) the tube is spherical. Pipe connection according to claim 1, characterized in that the first component ( 1 ) is a hydraulic pump, which via elastic elements in the second component ( 2 ) is held. Pipe connection according to claim 1, characterized in that the second component ( 2 ) is a transmission housing of a power split transmission. Pipe connection according to claim 4, characterized in that the pipe ( 3 ) as hydraulic fluid supply for the hydraulic pump ( 1 ) serves. Pipe connection with a pipe ( 3 ), with a first end ( 4 ), which in a bore ( 5 ) of a first component ( 1 ), and a second end ( 11 ), which in a second component ( 2 ), wherein the first component ( 1 ) with the second component ( 2 ) is connected via elastic elements, the first end ( 4 ) and the second end ( 11 ) are formed so that movements between the first component ( 1 ) and the second component ( 2 ) are possible, characterized in that between the second component ( 2 ) and the second end ( 11 ) a spring element is arranged, whereby the pipe ( 3 ) in the direction of the first component ( 1 ) on the contact surface ( 6 ) is pressed.