Arrangement for cooling a device, in particular a gearbox, and gearbox

Abstract

Tempering arrangement, wherein a piping (1) is arranged on a cover part (5), wherein the cover part (5) can be used to close a recess of a gearbox, wherein the piping (1) has a meandering, multiply bent pipe, wherein the pipeline is guided through recesses in the cover (5), wherein the end regions of the pipeline of the piping (1) open into a distributor block (7) accommodating at least one or two connection devices (8), wherein the distributor block (7) is screwed to the cover part (5) on the side facing away from the piping (1), wherein a strut (2) is materially bonded to the piping (1) such that at least two spaced-apart areas of the piping (1) are connected to each other to reduce vibrations of the piping (1), and such that the bracing (2) is attached to at least two points of the piping (1), which are assigned to different turns of the piping (1), wherein a retaining means (3) is provided on the lid part (5) by means of which the piping (1) is connected to the lid part (5), wherein the piping (1) is materially bonded to the retaining element (3) and the retaining element (3) is screwed to the cover part (5), wherein the bracing (2) is used as a holding means (3) and is screwed to the cover part (5), wherein bores with sealing plugs (9) are provided on the distributor block (7), the orientation of which is perpendicular to the orientations of the connection devices (8).

Description

[0001] The invention relates to an arrangement for cooling a device, in particular a transmission, and a transmission.

[0002] It is known to equip gear housings with a recess through which functional parts can be inserted during assembly and which allows easy access during maintenance or inspection by quickly and easily removing a cover part placed on the recess.

[0003] A lubricant cooling system for a gearbox is known from US 2 687 784 A.

[0004] A cooling cartridge for a gearbox is known from DE 10 2007 024 511 A1.

[0005] A cooler for a gearbox is known from DE 20 2005 005 452 U1.

[0006] EP 0 853 225 A2 discloses a cooler for the oil in the housing of a gearbox.

[0007] A heat pipe for a differential is known from US 6 830 096 B1.

[0008] An oil cooler is known from DE 39 04 654 A1.

[0009] A gearbox with a gearbox cover is known from DE 42 12 243 A1.

[0010] An electric lubricating oil heater is known from DE 81 23 917 U1.

[0011] A gymnastics device is known from DE 100 33 684 A1.

[0012] DE 10 2005 017 260 A1 discloses a closure for openings in valve blocks of vehicles.

[0013] The invention is therefore based on the object of enabling a higher power density in gearboxes, i.e. making a higher power per unit volume achievable.

[0014] According to the invention, the object is achieved by the arrangement according to the features specified in claim 1.

[0015] Important features of the invention in the arrangement for cooling a device, in particular a gear, are that a piping is arranged on a cover part, wherein the cover part can be used to close a recess of a gear.

[0016] The advantage here is that the cover is connected to the piping. This means that when the cover is removed from the gearbox housing, the piping can be removed too, without any separate work being required. This allows for quick and easy operation during inspection and maintenance, as well as during assembly. The power density of the gearbox is also increased and cooling is possible directly next to the heat sources in the interior of the gearbox. It is also important that the cover only covers a recess in one side surface of the gearbox and therefore does not itself accommodate any functional parts. This means that the functional parts of the gearbox are connected to the gearbox housing, which enables the dissipation of torques and forces and essentially does not occur through the cover.The cover part therefore fulfills the function of closing an opening in the gearbox housing, i.e., forming the housing, and also the holding and accommodating function for the piping, i.e., cooling the gearbox. This closing function prevents leaks, i.e., the escape of lubricant into the environment. This holding function simplifies assembly, as described above. The cover part can be equipped with a seal for a tight connection to the gearbox housing, particularly when the cover part is screw-connected to the gearbox housing.

[0017] According to the invention, the piping comprises a multiply bent pipe, in particular a pipe bent in a meandering shape or in a coil. This is advantageous in that improved heat dissipation and improved penetration of the free spaces in the gearbox can be achieved.

[0018] According to the invention, the pipeline is guided through recesses in the cover, wherein the end regions of the pipeline of the piping open into a distributor accommodating at least one or two connection devices, In particular, the distribution block is connected to the cover part on the side facing away from the piping, in particular by screwing. Advantageously, the cover part supports the piping and a distribution block. This allows the piping to be connected to external pipelines outside the cover part.

[0019] According to the invention, a strut is connected to the piping so that at least two spaced-apart areas of the piping are connected to each other, in particular to reduce vibrations of the piping, In particular, the bracing is secured at least at two points on the piping, particularly those associated with different turns of the piping. The advantage of this is that greater stability against vibrations can be achieved, thus relieving stress on the piping and its connecting areas.

[0020] According to the invention, a holding means is provided on the cover part, by means of which the piping is connected to the cover part, In particular, the piping is connected to the retaining element by a material or force fit, and the retaining element is screwed to the cover part. The advantage here is that the retaining function, i.e., the connection to the cover part, can be produced easily and cost-effectively. In particular, this provides additional vibration damping. Furthermore, the piping is attached to the cover part and thus arranged so that it can be removed together with it.

[0021] According to the invention, the strut is used as the retaining means, in particular, it is screwed to the cover part. The advantage here is that no additional retaining means are required; the existing struts fulfill this function.

[0022] In an advantageous embodiment, a seal is arranged on the cover part for a tight connection to the housing part of the gearbox. This is advantageous because the gearbox can be filled with lubricating oil, and the cooling medium in the piping is separated from this lubricating oil.

[0023] Important features of the gearbox with a housing part having a recess or opening which can be closed with a previously described arrangement are that the cover part is connected to the housing part of the gearbox, in particular screw-connected.

[0024] The advantage here is that an opening in the gearbox can be closed by means of the cover part and that the cooling arrangement including piping is attached to the cover part and can be pulled out together with it.

[0025] The invention will now be explained in more detail with the aid of illustrations: In the Fig. 1 shows a piping 1 with struts 2 not according to the invention. In the Fig. 2, the cover 5 not according to the invention is shown in an oblique view. In the Fig. 3, the cover 5 not according to the invention is shown in a different viewing direction.

[0026] The piping 1 consists of a multiply bent pipe, which partly runs in a meandering shape and / or in a coil.

[0027] Struts 2 are installed between different sections of the piping, particularly between different turns. This stabilizes the piping. The struts 2 are preferably made of sheet metal parts that are welded and / or soldered to the piping 1. The piping 1 is arranged on a cover 5 by means of retaining means 3, which are screwed to the cover 5 by means of fastening screws 4.

[0028] In addition, the cover 5 has at least two recesses for the passage of the end regions of the pipeline, so that a distribution block 7 is arranged on the side of the cover 5 facing away from the piping 1, which also has connection devices 8 for external pipelines. Thus, on the outside of the cover, i.e., on the side facing away from the piping 1, the distribution block 7 serves as an interface for connecting the external pipelines.

[0029] The distribution block 7 is screwed to the cover 5 using fastening screws 6.

[0030] The cover 5 has rectangular recesses so that a viewing window or another housing part can be attached to close the recesses.

[0031] Overall, the cover 5, including the piping, can be used to close a recess, in particular an opening, in a transmission housing. A seal, in particular an O-ring or other rubber seal, can be arranged between the transmission housing and the cover 5. In this way, this recess can be tightly closed.

[0032] The gearbox housing can be designed as a welded steel housing or a cast part, particularly as a one-piece cast part. The functional parts of the gearbox housing, particularly shafts and gearing parts, can be inserted through the recess. Furthermore, the recess can be used during operation, particularly during maintenance, for inspecting the gearbox and / or replacing functional parts, for refilling or replacing lubricating oil, and / or for taking oil samples.

[0033] The cover is screwed to the gearbox housing and can therefore be removed quickly and easily. Since the piping 1 is attached to the cover by means of the distributor block 7 and the retaining elements 3, the piping and cover 5 are simultaneously removed from the rest of the gearbox when the cover is unscrewed and removed. This eliminates the need for further removal of the piping when replacing a functional part of the gearbox.

[0034] Piping 1 is designed to accommodate a cooling medium, such as a gas or liquid. Water is advantageously used for this purpose. The gearbox's lubricating oil can also be used. For this purpose, a pumping device conveys the oil from the gearbox's oil sump into the piping and then back again from its outlet. It is advantageous to direct the returned lubricating oil to the gearbox's lubrication points and from there allow it to flow back into the oil sump.

[0035] When connecting the cover 5 to the gearbox housing, the piping 1 fits into the free spaces, i.e. cavities, between the functional parts, in particular gear parts, bearings and shafts, of the gearbox and the gearbox housing.

[0036] Preferably, the piping extends into the oil sump and / or passes through the spray area, which is penetrated by sprayed oil drops or oil foam when a gear part rotates.

[0037] The distribution block 7 is provided with bores with sealing plugs 9, whose orientation is perpendicular to the orientation of the connecting devices 8, in particular, which are designed as threaded bores. Thus, the pipes of the piping are inserted into the bores from below and can be connected to the distribution block 7 by forming, in particular rolling, a tool inserted into the bores from above.

[0038] Instead of the cooling medium, warm liquid, especially warm water, can also be fed through the piping to keep the lubricant at a desired operating temperature. The device, especially the gearbox, can be used in cold environments, for example, at ambient temperatures below minus 20 or 30°C, since the lubricant can be kept at a minimum of 40°C, for example, ensuring the gearbox is sufficiently well lubricated and friction losses are acceptable.

[0039] In one embodiment according to the invention, the struts 2 are integrally connected to the piping 1, in particular by adhesive bonding, welding, and / or soldering. Furthermore, the strut can be screwed to the cover 5, so that the strut prevents vibrations of the piping on the one hand, and secures the piping by means of the cover on the other. List of reference symbols 1 Piping 2 bracing 3 holding devices 4 fixing screws 5 lids 6 fixing screws 7 Distribution block 8 Connection device 9 sealing plugs

Claims

[1] Arrangement for tempering, wherein a piping (1) is arranged on a cover part (5), wherein the cover part (5) can be used to close a recess of a gear, wherein the piping (1) comprises a meandering, multiply bent pipeline, wherein the pipeline is guided through recesses in the cover (5), wherein the end regions of the pipeline of the piping (1) open into a distributor block (7) accommodating at least one or two connection devices (8), wherein the distributor block (7) is screw-connected to the cover part (5) on its side facing away from the piping (1), wherein a strut (2) is integrally connected to the piping (1) so that at least two spaced-apart regions of the piping (1) are connected to one another to reduce vibrations of the piping (1), and such that the strut (2) is attached to at least two points of the piping (1), which are assigned to different turns of the piping (1), wherein a holding means (3) is provided on the cover part (5), by means of which the piping (1) is connected to the cover part (5), wherein the piping (1) is integrally connected to the holding means (3) and the holding means (3) is screw-connected to the cover part (5), wherein the strut (2) is used as holding means (3) and is screw-connected to the cover part (5), wherein bores with sealing plugs (9) are provided on the distributor block (7), the orientation of which is perpendicular to the orientations of the connecting devices (8). [2] Arrangement according to claim 1, characterized by that a seal is arranged on the cover part (5) for a tight connection with the housing part of the gearbox. [3] Arrangement according to one of the preceding claims, characterized by that the piping (1) consists of one or more stainless steel pipes. [4] Gearbox with a housing part having a recess or opening which can be closed with an arrangement according to one of the preceding claims, characterized by that the cover part (5) is screwed to the housing part of the gearbox.

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