DE202009009158U1 - hydraulic pump - Google Patents

Abstract

Hydraulic pump, comprising:
a motor housing (42);
a motor cover (43) having a through hole (431) and fixed to one side of the motor housing (42), wherein a motor (40) by the motor cover (43) and the motor housing (42) is wrapped, wherein inside the Motor (40) has a rotation axis (41) is mounted; and
a hydraulic pump (50) comprising a hydraulic pump port (51), a cover (54) and a rotor, the hydraulic pump port (51) being disposed on and integrally formed with the engine cover (43), one end of the rotation axis (41 ) is guided through the through hole (431) of the engine cover (43) and the hydraulic pump port (51), wherein the rotor of the hydraulic pump (50) on the rotational axis (41) of the motor (40) is arranged, wherein the cover (54) Hydraulic pump port (51) is arranged sealed.

Description

Technical area

The The invention relates to a hydraulic pump according to the preamble of the claim 1.

State of the art

Conventional cycloidal pumps for liquids are characterized by the following:
a main body having an axial hole, wherein a receptacle is provided in the main body, which communicates with the oil supply and -ausfuhr the main body, wherein the receptacle communicates with the outside world and is arranged eccentrically to the axial hole;
an outer rotor which is coaxial with the receiver and flexibly arranged therein, wherein in the outer rotor, a geometric through hole is formed, which is arranged coaxially with the axial hole of the main body;
a shaft passing through the axial hole of the main body;
an inner rotor that retracts and provides oil in response to the outer rotor upon rotation of the outer rotor, the inner rotor being coaxially mounted on the shaft and received in the through hole, the interior of the inner rotor and the shaft being in reverse rotation relative to each other;
at least one bearing through which the shaft passes, wherein the bearing disposed on the shaft is positioned on at least one of the two sides corresponding to the receptacle in the main body; and
a cover disposed at the end of the main body at which end the receptacle is provided.

The o. g. conventional Cycloidal pump for liquids however, has the following disadvantages.

4 shows a conventional hydraulic pump, on the shaft 2 two mounting surfaces 21 . 22 are made, wherein on the end face of the shaft 11 of the motor 1 also a connecting groove 111 is formed, the two corresponding connection surfaces 112 . 113 needs. Here, however, there are the problems that a recess of the wave 11 is not easy, and the coaxiality is not accurate, resulting in a slight bumping of the shaft 2 the hydraulic pump leads; In addition, a thermal treatment at the shaft can be 2 not easy to perform, and the corresponding costs and the manufacturing costs for the connection are relatively high. In case of poor coaxiality, calibration is not possible, which causes limited transmission power, and the wave 2 is easily broken.

To solve the problems of the above conventional pump was a shaft coupling 3 originated, how out 5 it can be seen, with two sockets 31 . 32 each connected to the shaft of the motor and the shaft of the pump. On the opposite side of the pedestal 31 . 32 are recesses 311 . 321 and approaches 312 . 322 arranged accordingly. Between the sockets 31 . 32 is a flexible element 33 arranged, which has a projection 331 which is exactly between the approaches 312 . 322 the base 31 . 32 spaced apart. In this embodiment, the problem of poor coaxiality between shafts by the flexible element 33 solved, so that the waves are not easy to break. However, the shaft coupling has 3 a large volume, so that in case of no space between the motor and the pump no assembly of the shaft coupling 3 is possible; In addition, the shaft must be extended. This will reduce the cost of the shaft coupling 3 and the connections increased. In this embodiment is still to complain that an assembly must be performed.

Object of the invention

Of the Invention has for its object to provide a hydraulic pump, with the o. g. defects be eliminated in the prior art.

Technical solution

These Task is solved by a hydraulic pump according to the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

The inventive hydraulic pump comprises a motor housing; a motor cover having a through hole and at one Side of the motor housing is fixed, wherein a motor is enveloped by the motor cover and the motor housing, wherein a rotation axis is mounted inside the motor; and a Hydraulic pump, which has a hydraulic pump connection, a cover and a rotor, wherein the hydraulic pump port on the engine cover is arranged and manufactured in one piece with the same, wherein a End of the axis of rotation through the through hole of the engine cover and the Hydraulic pump connection led is, wherein the rotor of the hydraulic pump on the axis of rotation of the motor is arranged, wherein the cover on the hydraulic pump connection is arranged sealed. In the hydraulic pump according to the invention is not a shaft coupling or rotary axis for mounting the hydraulic pump necessary, and there is no connection problem, thus ensuring the coaxiality and costs can be significantly reduced.

Short description of the drawing

1 shows a perspective view of an embodiment of the invention in the disassembled state.

2 shows a perspective view of the embodiment of the invention in the assembled state.

3 shows a sectional view of the embodiment of the invention in the assembled state.

4 shows a perspective view of a conventional embodiment in the disassembled state.

5 shows a perspective view of another conventional embodiment in the disassembled state.

Ways of executing the invention

in the Following are the tasks, features and benefits of the present Invention with reference to the detailed description of an embodiment and the attached Drawings closer explained become. However, the invention should not be limited to the description and the attached Limited drawings become.

How out 1 to 3 As can be seen, the hydraulic pump according to the invention comprises a motor housing 42 ; an engine cover 43 that's a through hole 431 and on one side of the motor housing 42 is attached, being an engine 40 through the engine cover 43 and the motor housing 42 is sheathed, being inside the engine 40 a rotation axis 41 is mounted; and a hydraulic pump 50 that have a hydraulic pump connection 51 , a cover 54 and a rotor, wherein the hydraulic pump port 51 on the engine cover 43 is arranged and made with the same one piece, wherein one end of the axis of rotation 41 through the through hole 431 the engine cover 43 and the hydraulic pump connection 51 is guided, wherein the rotor of the hydraulic pump 50 at the axis of rotation 41 of the motor 40 is arranged, with the cover 54 at the hydraulic pump connection 51 is arranged sealed. In the hydraulic pump of the present invention, no shaft coupling or rotation axis is required for mounting the hydraulic pump, and there is no connection problem, so that the coaxiality is ensured, and the cost can be significantly reduced.

The rotor contains an inner rotor 52 and an outer rotor 53 , where the inner rotor 52 at the axis of rotation 41 in the outer rotor 53 is mounted, the axis of rotation 41 through the connection with the inner rotor 52 the outer rotor 53 brings to moving.

The hydraulic pump connection 51 and the engine cover 43 are manufactured in one piece in the stamping process.

According to the invention, the engine cover 43 and the hydraulic pump connection 51 manufactured in one piece; the axis of rotation 41 of the motor 40 is at the same time the axis of rotation of the hydraulic pump 50 , The invention is simple in design, consists of few components and is easy to install.

• (1) bei einer herkömmlichen Hydraulikpumpe müssen an einer Welle zwei Montageflächen gefertigt werden, wobei an der Endfläche der Welle des Motors ebenfalls eine Verbindungsnut ausgebildet werden muss, wobei ein Aussparen der Welle nicht einfach ist, die Koaxialität nicht genau ist, und die Montage schwer ist; erfindungsgemäß erstreckt sich die Welle des Motors direkt in die Hydraulikpumpe so dass keine Verbindungsstange erforderlich und keine Montage erforderlich sind; und
• (2) bei einer herkömmlichen Hydraulikpumpe muss eine Wellenkupplung mit zwei Wellen vorgesehen werden, wobei die Wellenkupplung hohe Kosten verursacht und ein großes Volumen besitzt, so dass für die Montage der Wellenkupplung ein gewisser Raum benötigt ist; erfindungsgemäß erstreckt sich die Welle des Motors direkt in die Hydraulikpumpe, so dass keine Wellenkupplung benötigt ist, das Problem mit der Montage nicht besteht, und eine genaue Koaxialität gewährleistet wird; dadurch wird die Präzision des Produkts erhöht, und die Lebensdauer des Produkts wird durch Vermeiden der Vibrationen während des Betriebs verlängert.

Compared with the prior art, the invention has the following advantages:

• (1) In a conventional hydraulic pump, two mounting surfaces must be fabricated on one shaft, and a connecting groove must also be formed on the end surface of the shaft of the motor, disengaging the shaft is not easy, the coaxiality is not accurate, and assembly is difficult is; According to the invention, the shaft of the motor extends directly into the hydraulic pump so that no connecting rod required and no assembly is required; and
• (2) In a conventional hydraulic pump, a shaft coupling with two shafts must be provided, the shaft coupling is expensive and has a large volume, so that a certain space is required for mounting the shaft coupling; According to the invention, the shaft of the motor extends directly into the hydraulic pump, so that no shaft coupling is needed, the problem with the assembly does not exist, and an accurate coaxiality is ensured; this increases the precision of the product and extends the life of the product by avoiding vibration during operation.

1

engine

11

wave

111

communicating

112

mounting surface

113

mounting surface

2

wave

21

mounting surface

22

mounting surface

3

shaft coupling

31

base

311

recess

312

approach

32

base

321

recess

322

approach

33

flexible element

331

head Start

40

engine

41

axis of rotation

42

motor housing

43

engine cover

431

Through Hole

50

hydraulic pump

51

Hydraulic pump connection

52

inner rotor

53

outer rotor

54

cover

Claims (3)

A hydraulic pump comprising: a motor housing ( 42 ); a motor cover ( 43 ), which has a through hole ( 431 ) and on one side of the motor housing ( 42 ), whereby a motor ( 40 ) through the engine cover ( 43 ) and the motor housing ( 42 ), wherein inside the engine ( 40 ) a rotation axis ( 41 ) is mounted; and a hydraulic pump ( 50 ), which has a hydraulic pump connection ( 51 ), a cover ( 54 ) and a rotor, wherein the hydraulic pump connection ( 51 ) on the engine cover ( 43 ) is arranged and with the same one piece, wherein one end of the axis of rotation ( 41 ) through the through hole ( 431 ) of the engine cover ( 43 ) and the hydraulic pump connection ( 51 ), wherein the rotor of the hydraulic pump ( 50 ) at the axis of rotation ( 41 ) of the motor ( 40 ) is arranged, wherein the cover ( 54 ) at the hydraulic pump connection ( 51 ) is arranged sealed. Hydraulic pump according to claim 1, characterized in that the rotor has an internal rotor ( 52 ) and an outer rotor ( 53 ), wherein the inner rotor ( 52 ) at the axis of rotation ( 41 ) in the outer rotor ( 53 ) is mounted, wherein the axis of rotation ( 41 ) by the connection with the inner rotor ( 52 ) the outer rotor ( 53 ) to move. Hydraulic pump according to claim 1 or 2, characterized in that the hydraulic pump connection ( 51 ) and the engine cover ( 43 ) are manufactured in one piece in the stamping process.