DE102004022863B4 - transmission - Google Patents

Abstract

Transmission comprising a cover and a remaining housing, which are tightly and detachably connectable,
the lid comprising a cooling device,
wherein the cooling device is in contact with lubricant of the transmission on its inside and is in contact with a cooling medium on its outside,
wherein the lid comprises a heating resistor,
wherein the lid comprises at least one sensor for determining a temperature of the lubricant,
wherein the lid has an electronic circuit connected to sensor and heating resistor for controlling the temperature of the transmission.

Description

The The invention relates to a transmission.

From the DE 197 04 226 A1 An inverter motor is known in which a housing part of the converter is equipped with cooling fins and / or cold fingers. The electronic power semiconductors are thermally conductively connected to the housing part.

From the DE 40 29 641 A1 a transmission is known which has a cover and a remaining housing, which are tightly and detachably connectable, wherein on the cover an oil-air heat exchanger is provided.

From the DE 82 12 219 U1 is also a lid with a cooling device is known, which is tightly and detachably connectable to a remaining housing.

From the US 6 202 736 B1 , from the EP 0 990 820 A2 , from the GB 2 103 301 A , from the US 6 155 135 A , from the EP 0 853 225 A2 , from the DE 42 12 243 A1 , from the DE 102 45 791 A1 , from the US 4,022,272 , from the US 2 687 784 , from the JP 2002 005 270 A and from the JP 07 103 317 A Similar transmissions are known.

From the CH 187 201 For example, a method for cooling transmissions is known.

From the DE 81 23 917 U1 is known an electric lubricating oil heating.

Of the Invention is based on the object to develop a transmission, in particular the temperature influences on the operating behavior are reducible.

According to the invention Task in the transmission according to the features specified in claim 1 solved.

Important Features of the invention in the transmission are that the transmission a lid and a remaining housing, the tight and detachable connectable are covered, wherein the lid comprises a cooling device.

From The advantage here is that an improved cooling, so heat dissipation can be reached from the lubricant. Thus, the transmission has a higher power density and is able to transmit more torque permanently. The allowed Maximum temperature is no longer as easy to achieve as one comparable transmission according to the prior art. Besides that is reduces the aging of the lubricant. Because at lower Temperatures are aging less. That's how the intervals are for lubricant change enlarged and thus reducing the operating costs.

at an advantageous embodiment, the lid is made of aluminum, in particular an aluminum die-cast part. It is advantageous that manufacturing cost-effective is and the specific thermal resistance is low.

at In an advantageous embodiment, the cooling device comprises cold fingers and / or cooling fins. The advantage here is that the removal of lubricant heat is mounting direction independent.

at In an advantageous embodiment, the cooling device is on its inside in contact with lubricant of the gearbox and on its outside with a cooling medium, especially air. The advantage here is that the heat transmission directly over the Lid is providable.

at an advantageous embodiment, the cover comprises a fan or another device for driving and / or moving the cooling medium. The advantage here is that the cooling power in this way is greatly improved.

at According to an advantageous embodiment, the cover comprises a heating resistor. The advantage here is that at low ambient temperatures, the viscosity of the lubricant can be increased is and thus the efficiency is improved.

at According to an advantageous embodiment, the lid comprises at least one Sensor for determining a temperature of the lubricant. Advantageous is in the process of having a surveillance allows the transmission is.

at According to an advantageous embodiment, the lid comprises at least one Sensor for determining a temperature of the environment. Advantageous is in the process of being the heat model and thus also the regulation or at least influencing the lubricant temperature is improvable.

at an advantageous embodiment are data and / signals from the lid to other devices, in particular fieldbus participants, transferable. The advantage here is that a remote control and / or remote monitoring allows is.

An advantageous construction kit of transmissions comprises at least one transmission with two different covers. The advantage here is that depending on the system in which the transmission is installed, the lid in its various features quickly and easily customizable and interchangeable. This means that the gearbox can be adapted to changing requirements without having to replace it. Further Advantages emerge from the subclaims.

1

cold finger

2

cover as a housing part of the transmission

3

remaining casing of the transmission

4

output shaft

5

electric motor

6

Fan

7

junction box

8th

connecting bolts

The Invention will now be explained in more detail with reference to figures:

In the 1 is an inventive transmission in plan view and sectional view drawn.

The transmission comprises a housing part, hereinafter referred to as cover 2 referred to as. The rest of the housing 3 is preferably made of cast iron, in particular cast steel. The output shaft 4 , Input shaft and provided depending on the number of stages of the transmission, arranged in the transmission intermediate shafts are about bearings in this remaining housing 3 stored. About this remaining case 3 Thus, high mechanical forces are derivable, since casting has a high mechanical stability and low deformability.

The lid 2 is preferably so on this remaining housing 3 provided that it is in contact with the lubricant, in particular oil, of the transmission. So the specific heat transfer resistance from the lubricant to the lid 2 low, especially lower than the lubricant to the rest of the housing 3 , The lid 2 is preferably made of aluminum. Alternatively, another material having a high specific heat conductivity is usable.

The lid 2 has an interface to the rest of the transmission housing 3 on, by means of a seal, for example, advantageously a flat stamped part made of plastic or rubber, a bottle seal or an O-ring, can be sealed. In addition, the lid is by means of connecting screws 8th releasably connectable with the rest of the housing 3 of the transmission.

The rest of the housing 3 provided recess, which serves to form the interface to the lid 2 is provided, is designed such that the mechanical stability is not significantly affected. In particular, most of the mechanical power flows will not pass through the lid 2 but through the rest of the housing 3 directed.

The Interface is designed in such a way that by the different thermal expansion coefficients of aluminum and cast heat-related expansions can be compensated within the interface and / or no leaks occur.

The connection box 7 is executable such that only connection devices for connecting the supply lines of the electric motor 5 are provided. In a further embodiment according to the invention, however, an electronic circuit, such as brake rectifier, motor soft-start electronics or a converter for the supply and / or control of the electric motor, in the connection box 7 be provided.

The electric motor 5 is by means of the fan 6 cooled.

Of the described lid is the first variant, so as the first example according to the invention, without cold fingers or heat sink executed but is flat. There is thus no special space required.

In the second variant, the lid 2 , as in 1 shown, in addition to a cooling device. The cooling device is advantageously with cold fingers 1 executed. Thus, heat can be dissipated to the surrounding cooling medium, for example air or special water.

In further embodiments of the invention, the lid 2 also executable additionally or exclusively with cooling fins.

In third variant, the lid additionally has an electrically operable Fan or a pump, which is a cooling medium drives to flow through the Cooler.

In fourth variant, the lid has an electrical heating resistor on. Thus, the heat generated by the heating resistor is because of the low heat transfer resistance quickly and almost directly into the lubricant can be introduced. This is especially advantageous if the transmission when starting or also operating at a very low temperature and therefore the viscosity is still unfavorably low. By means of the introduction of the Heating resistor generated heat is the viscosity can be increased and thus the efficiency of the transmission can be improved. By means of the Heating resistor is a remote control of the temperature of the transmission allows.

In the fifth variant, the lid has an electronic circuit with sensor. In this way, a temperature of the lubricant can be determined. Depending on this temperature is the Heizwider was switched on or off. Thus, at low ambient temperatures, the viscosity can be increased and at high temperatures, the heat generated during engagement of the gear parts and during operation of the bearing from the lubricant via the lid can be discharged. By means of the sensor, a remote monitoring of the transmission is thus made possible if the measurement data of the sensor can be transmitted via a channel, for example a bus system such as a fieldbus or the like. Thus, in cooperation of the sensor and the heating resistor and the associated electronic circuits with data transmission, a regulation of the temperature allows or at least an influence.

One Advantageous modular gearboxes include the variants mentioned of lids and the remaining gear. It is advantageous in the formation of the Modular kit that depending on the application requirements a lid selectable and can be used. For example, in a drive comprising a gear, a lid of the first variant used. This is inexpensive. If later then When operating the operator is determined that the heat dissipation is too low, the lid is easy and fast against something more expensive lid of the second or even third variant interchangeable. If now again later - for example in winter or in cold stores - noted is that when starting the drive, the lubricant is too high viscosity is and / or therefore, for example, the starting torque is too low, is the lid of fourth or even fifth variant used. Thus, the transmission is quick and easy to convert and optimize on the Operating conditions.

Of the Lid is in sixth variant also with a temperature of Environment associated sensor providable. Thus, an even improved heat model calculable and influencing the temperature of the lubricant improvable.

Vorteilig is also that in the camp only the smaller lids in the mentioned Versions are to be kept and not the larger remaining housing of the transmission.

All in all Thus, the energy consumption of the drive can be reduced.

at other embodiments of the invention is the rest of the housing The gearbox is not made of cast steel but of aluminum, in particular Die-cast aluminum, manufactured. To the mentioned advantages of the invention then reach, a simple flat lid is then not sufficient but there must be a lid with cooling device, so cooling fins or cold fingers, used to the desired To achieve improvements.

Claims (9)

Transmission comprising a cover and a remainder Casing, the tight and detachable are connectable, the lid comprising a cooling device, in which the cooling device on its inside is in contact with lubricant of the gearbox and on its outside with a cooling medium is in contact, wherein the lid comprises a heating resistor, in which the lid has at least one sensor for determining a temperature includes the lubricant, where the lid is a sensor and heating resistor connected electronic circuit for Regulation of the temperature of the gearbox. Transmission according to claim 1, characterized that the cooling medium Air is. Transmission according to at least one of the preceding Claims, characterized in that the lid is made of aluminum. Transmission according to at least one of the preceding Claims, characterized in that the lid is an aluminum die cast part is. Transmission according to at least one of the preceding Claims, characterized in that the cooling device is cold finger, in particular for mounting direction independent removal of lubricant heat, and / or cooling fins includes. Transmission according to at least one of the preceding Claims, characterized in that the lid is a fan or other device for driving and / or moving the cooling medium comprises. Transmission according to at least one of the preceding Claims, characterized in that the lid has at least one sensor for Determining a temperature of the environment comprises. Transmission according to at least one of the preceding Claims, characterized in that data and signals from the lid to further Devices transferable are. Transmission according to claim 8, characterized that the other devices are fieldbus subscribers.