DE102004006578A1 - Housing for a gearing arrangement for driving a mixing drum comprises a wall having a large passage which is closed in a liquid-tight manner by a component of lower strength and weight - Google Patents

Abstract

Housing comprises a wall (3) having a large passage (9) which is closed in a liquid-tight manner by a component (12) of lower strength and weight.

Description

The The invention relates to a housing for a transmission for driving a mixing drum according to the closer defined in the preamble of claim 1 Art.

Generic transmission are used to drive a mixing drum in a truck mixer, wherein the drum of the truck mixer is preferably filled with concrete and the weight of the drum in the radial and axial directions via a bearing in the mixer gearbox in the housing the mixer gear is introduced, which is on a pedestal, which is connected to supporting parts of the vehicle attached is.

at Some applications have the case of the Mixer gearbox additionally the task of holding a water tank.

The US 4,585,356 discloses a truck mixer in which the drum of the truck mixer is driven by a mixer gear which is capable of rotating the drum and accommodating the radial and axial forces of the drum in both the loaded and unloaded conditions. The housing of the mixer gearbox is mounted on a pedestal and carries a water tank.

The US 5,746,509 discloses a mixer gear with a housing part, which carries a bearing, via which the weight forces of a mixer drum via the output flange and the bearing can be introduced into the gear housing. The gear housing has bearing surfaces, via which the gear housing can be mounted on a pedestal in the truck mixer.

Within of the housing a reduction gear is arranged and the housing forms a room for the lubricant of the gearbox.

Especially in truck mixers, the curb weight of the vehicle is special Meaning, because by the limitation of the permissible total weight, the curb weight directly determines the amount of goods to be transported.

Of the present invention is based on the object, the curb weight to reduce the truck mixer.

The The object is with a, even the characterizing features of the main claim having housing for a Gear solved to drive a mixing drum.

Forms according to the invention the housing a room for the lubricant and directs the weight of the mixer drum over the Bearing surfaces of the housing to a pedestal of the vehicle on. The space for the lubricant is through a housing wall formed, which has at least one major breakthrough, which in turn by a component of lower strength and lower Weight liquid tight is closed. The gearbox needs in the area in which the forces be transferred in particular from the storage to the bearing surfaces, sufficient Material thickness and strength to meet these loads become. In the area of the housing, in which the loads are lower, the housing has breakthroughs. This creates a transmission housing, which is skeletal and in which only the strength necessary areas with sufficient material thickness and strength getting produced. this leads to to a significant weight reduction of the mixer gear housing. The breakthroughs be sealed liquid-tight with one or more components, wherein these components have a significantly lower weight.

These Components can for example, from a sheet metal forming part or a plastic part be prepared. Indicates the case additionally Mounts for a water tank, so are preferably the two outer areas, which the holders of the water tank with the bearing surfaces for the base connect, made of a material of larger walls produced. In a further embodiment, the housing has a first and a second cylindrical portion, between which there is at least one breakthrough. There is also the possibility several breakthroughs in between to arrange. The component which closes the openings has also a first and a second cylindrical section on, wherein the first cylindrical portion of the housing with the first cylindrical portion of the component and the second cylindrical Section of the housing with the second cylindrical portion of the component also liquid-tight are connected. Thus, there is the possibility of housing and to manufacture the component in a simple way.

In In another embodiment, it is possible to seal between the housing and the component on the one hand on a cylindrical portion in radial Direction and on the other hand on a flange-like portion in the axial direction perform.

In a further embodiment, the flange-like portion is located between a Component of the reduction gear, preferably a gear, and a stop surface of the housing. As a result, the seal and the axial fixation of the component in the housing takes place at the same time.

In In another embodiment, there is the possibility of both seals in a radial manner or to perform both seals in an axial manner.

It However, there is also the possibility the components over a flat gasket and, for example, a screw connection on one flat surface perform.

As well it is possible, the component not only on the inner wall of the housing, but also on the outer wall of the housing to install.

By doing the housing for a Transmission for driving a mixing drum in the area in which it experiences lower loads, Has breakthroughs, which are closed with components, which lower weight have a housing for a Gear for driving a mixing drum created which reduces weight is. By the case has cylindrical sections inside and the component likewise cylindrical is or a pot-shaped Having shape, the housing can in a simple way cost-effective getting produced. By the flange of the component between a Component of the reduction gear and a contact surface of the housing Fixed in the axial direction, no additional Fastener required for securing the component in the housing.

Further Features are shown in the figure description.

It demonstrate:

1 a spatial view of a cut housing for a transmission for driving a mixing drum and

2 a half section through the housing of the mixer gear.

1 :

The housing 1 for a transmission for driving a mixing drum has a first cup-shaped portion 2 on, which serves to accommodate the storage, as in the US 5,746,509 is disclosed. The cup-shaped section 2 is with a first housing wall 3 connected, which with another cylindrical housing wall 4 connected is. At the bottom of the cylindrical housing wall 4 are bearing surfaces 5 arranged, which with the cylindrical housing wall 4 are connected and to connect the housing 1 be used with a base, not shown, of the vehicle. The bearing surfaces 5 are over jetties 6 with a holder 7 connected to receive a water tank. The forces resulting from storage in the cup-shaped section 2 be initiated are on the housing wall 3 in the footbridges 6 and from there over the bearing surfaces 5 introduced into the socket. In the cylindrical housing wall 4 there is a ring gear 8th , whose torque from the cylindrical housing wall 4 to the victories 6 and from there over the bearing surfaces 5 is introduced into the socket. Thus, the area between the bars 6 almost free of forces. In this area, between the jetties 6 , there are breakthroughs 9 , which helps to reduce the weight of the housing 1 to lead. The cylindrical housing wall 4 has a first cylindrical portion 10 and a second cylindrical portion 11 on. A cylindrical component 12 with a flange 13 seals the breakthroughs 9 liquid-tight by a first sealing element 14 between the first cylindrical section 10 and the cylindrical section 15 of the component is arranged. The flange 13 is between the ring gear 8th and a contact surface 16 of the housing 1 arranged. The flange 13 is about a sealing element 17 with the housing 4 sealed watertight. Thus, the component 12 in a simple manner and in the axial direction over the flange 13 fixed. The cylindrical component 12 can be made as a metallic sheet metal part or as a plastic part.

In a further embodiment, it is possible in the field of breakthroughs 9 the component 12 form so that an enlarged lubricant space is created.

2 :

The cylindrical component 12 is over in sealing element 14 and a sealing element 17 with the cylindrical housing wall 4 connected liquid-tight. The flange 13 is between a ring gear 8th and a contact surface 16 axially fixed. The breakthrough 9 reduces the weight of the housing 1 and is disposed in a low load area of the housing.

1

casing

2

pot-shaped section

3

housing wall

4

cylindrical housing wall

5

support surfaces

6

Stege

7

bracket

8th

ring gear

9

breakthroughs

10

first cylindrical section

11

second cylindrical section

12

zylinderisches component

13

flange

14

sealing element

15

zylinderischer section

16

contact surface

17

sealing element

Claims (9)

Housing for a transmission for driving a mixing drum with a bearing receptacle ( 2 ) for receiving the weight of the mixing drum and bearing surfaces ( 5 ) for supporting the housing on a base and at least one housing wall ( 3 ), which on the one hand with the bearing surfaces ( 5 ) and on the other hand forms a space for a lubricant, characterized in that the housing wall ( 3 ) at least one major breakthrough ( 9 ), which by a component ( 12 ) lower strength and lower weight is sealed liquid-tight. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that an inner wall of the housing wall ( 3 ) a first and a second cylindrical portion ( 10 . 11 ), between which the breakthrough ( 9 ) and the component ( 12 ) also a first and a second section ( 13 . 15 ), which liquid-tight with the housing wall ( 3 ) are connected. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that between the component ( 12 ) and the housing wall ( 3 ) Sealing means are arranged. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that the component ( 12 ) is designed as a pot-shaped component. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that the component ( 12 ) a flange ( 13 ), which in the axial direction between the housing wall ( 3 ) and a transmission component ( 8th ) is held. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that the component ( 12 ) via two sealing points ( 14 . 17 ) liquid-tight with the housing wall ( 3 ), wherein one sealing point is a radial point and another sealing point is an axial sealing point. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that the housing wall ( 3 ) consists of a castable metal and the component consists of a sheet metal or plastic component. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that the breakthrough ( 9 ) in an area of the housing wall ( 3 ) is arranged, in which lower loads of the housing occur. Housing for a transmission for driving a mixing drum according to claim 1, characterized in that cast parts of the housing are designed like a skeleton and thereby breakthroughs ( 9 ), which have components ( 12 ) are sealed liquid-tight.