Reducer with housing and input shaft
By constructing an annular gap and setting protrusions in the reducer, combined with a cooling pipe system, the problem of heat loss in the reducer is solved, achieving a highly efficient and compact heat dissipation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SEW- IND GEARS TIANJIN CO LTD
- Filing Date
- 2024-12-27
- Publication Date
- 2026-06-30
AI Technical Summary
The reducer suffers from heat loss during operation, and existing technologies struggle to effectively dissipate heat.
An annular gap is constructed between the reducer housing and cover plate and the bearing receiving part. Cooling medium flows through this gap for heat dissipation. A protrusion is provided on the housing to enhance the flow of turbulent cooling medium. The cooling pipe system is integrated into the input side flange area to achieve efficient heat dissipation in a compact manner.
The improved cooling design effectively dissipates heat from the reducer, reduces thermal resistance, improves heat dissipation efficiency, and reduces the required structural space.
Smart Images
Figure CN122305210A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a speed reducer having a housing and an input shaft. Background Technology
[0002] It is known that reducers have heat loss power during operation. Summary of the Invention
[0003] Therefore, the object of the present invention is to improve the speed reducer in a compact manner.
[0004] According to the present invention, this objective is achieved by a speed reducer with the features described in claim 1.
[0005] A key feature of this invention is that the reducer includes a housing and an input shaft, wherein an annular gap through which a cooling medium flows is formed between the reducer's cover plate and the housing, particularly an annular or hollow cylindrical bearing receiving portion formed on the housing. This annular gap circumferentially surrounds the hollow cylindrical bearing receiving portion formed on the housing.
[0006] In particular, the input shaft bearing is housed in a bearing receiving section.
[0007] In particular, the bearing receiving part is a hollow cylindrical area formed by the housing component.
[0008] One advantage here is that effective heat dissipation of the housing components can be achieved. In particular, the cover can be positioned in the axial region covered by the bearing in the axial direction.
[0009] In an advantageous design, protrusions are constructed on the housing components, particularly on the bearing receiving portion. These protrusions are spaced apart from each other circumferentially, especially evenly, and project radially outward from the bearing receiving portion toward the cover plate, particularly through the annular gap. The advantage here is that the protrusions make the cooling medium flow more turbulent, thus enabling a lower thermal resistance.
[0010] In an advantageous design, the cover plate rests flat on the protrusion. The advantage here is that an annular gap is arranged between the bearing housing and the cover.
[0011] In an advantageous design, the cover plate is locked to the protruding material, particularly through welding. The advantage here is that a reliable and load-bearing connection can be used.
[0012] In an advantageous design, the longest dimension of the corresponding protrusion is formed and / or oriented transversely to the flow direction and / or axially, particularly parallel to the rotation direction.
[0013] In particular, the flow direction of the cooling medium, especially the main flow direction, is basically oriented in the circumferential direction. The advantage here is that these protrusions are transverse to the flow direction and thus create effective vortices in the cooling medium flow.
[0014] In an advantageous design, the axial width of the corresponding protrusion is smaller than the axial width of the annular gap. This provides an advantage in that the cooling medium also has sufficient free space to flow in the circumferential direction.
[0015] In a favorable design, the annular gap is defined and / or covered radially outward by a cover plate.
[0016] In particular, the cover plate consists of flat areas with folded edges arranged between them. The advantage here is that heat is radiated to the environment even through the thin cover plate, and the additional structural space required for the cooling system can be kept to a very small extent. Specifically, only a radial machining allowance is needed, which is equal to the radial width of the protrusions and the cover plate. However, the cover plate is followed by protrusions, all with the same radial width, and thus the cover plate is either curved or constructed from a single flat surface arranged at an angle to each other.
[0017] In an advantageous design, the annular gap is arranged within an annular groove section within a circumferential angle not covered by a cover plate. This annular groove section is formed in the housing and circumferentially surrounds the bearing receiving portion within that circumferential angle. The advantage here is that the annular gap is defined radially outward, either by the cover plate or by the housing itself. A two-piece implementation of the cover plate is also included in this case.
[0018] In an advantageous design, a flange region is constructed on the input side of the housing component, and annular grooves arranged concentrically with each other and concentrically with the rotation axis of the input shaft are formed in this flange region.
[0019] The annular groove contains a semi-circular or semi-annular ring tube.
[0020] One advantage here is that the reducer can be compactly constructed because the cooling pipe system is integrated within the reducer and requires very little construction space. In particular, the cooling pipe system is designed to be integrated into the flange region on the input side. Because the rapidly rotating input shaft generates high temperatures and therefore high heat flux, efficient heat dissipation is achieved according to the invention. This is because the cooling pipe system is arranged as close as possible to the bearing assembly for the input shaft, which acts as a heat source.
[0021] In a favorable design, interface components and multiple connectors are arranged on the flange area of the housing component.
[0022] In particular, the connector and interface components are pressed against the flange area by means of threaded parts screwed into threaded holes in the flange area.
[0023] In particular, the threaded part passes through the connector and interface component. An advantage of this is that it allows for fixation on the input side end face.
[0024] In an advantageous design, each of the connectors connects a semi-circular annular tube in the first half of the circumference to an adjacent annular tube arranged radially inward relative to that annular tube. The advantage here is that the cooling medium flows first meandering from the radial outside to the radial inside through the semi-circular tube in the first half of the circumference, and then meanders from the radial inside to the radial outside through the semi-circular tube in the remaining half of the circumference.
[0025] In an advantageous design, each of the connectors connects a semi-circular annular tube to an adjacent annular tube arranged radially inward relative to that annular tube in the other half of the circumference. The advantage here is that the cooling medium flows first meandering from the radial outside to the radial inside through the semi-circular tube in the first half of the circumference, and then meanders from the radial inside to the radial outside through the semi-circular tube in the remaining half of the circumference.
[0026] In an advantageous design, the interface component connects the first channel constructed within the housing to the first opening of the radially outermost, semi-annular first ring tube. The advantage here is that a simple, cost-effective connection can be achieved.
[0027] In an advantageous design, the interface component connects the second channel constructed within the housing to the first opening of the radially outermost, semi-annular second ring tube. The advantage here is that a simple, cost-effective connection can be achieved.
[0028] In a favorable design, the innermost radial ring is constructed as a complete ring and connected to the innermost radial connector. The advantage here is that a simple, cost-effective connection can be achieved.
[0029] In a favorable design, spacer retainers are arranged radially between the annular tubes.
[0030] In particular, the spacer retainer is pressed against the flange area by a threaded part screwed into a threaded hole in the flange area. The advantage here is that the spacer is secured in a simple way.
[0031] In an advantageous design, the first channel leads to the inlet connector, and the second channel leads to the outlet connector. The advantage here is that the input and output of the cooling medium are implemented very compactly, i.e., saving structural space. In particular, the cooling medium also flows directly through the housing, thus absorbing heat directly from the housing.
[0032] In an advantageous design, the first channel extends axially, particularly parallel to the axis of rotation of the input shaft, and passes through the housing component, especially through a radially projecting flange region on the housing component. The advantage here is that heat is transferred directly from the housing component to the cooling medium.
[0033] In an advantageous design, the second channel extends axially, particularly parallel to the axis of rotation of the input shaft, and passes through the housing component, especially through the radially projecting flange area on the housing component. The advantage here is that heat is transferred directly from the housing component to the cooling medium.
[0034] In an advantageous design, the flange region has a through bearing bore through which the input shaft passes.
[0035] In this design, the input shaft bearing is housed within a bearing bore. The advantage here is that the inner ring of the bearing is fitted onto the input shaft, and the outer ring is housed within the bearing bore. Therefore, the heat dissipated by the bearing flows directly into the flange region.
[0036] In a favorable design, each ring tube is designed as a thin-film ring tube.
[0037] In particular, there are uninterrupted thin sheets protruding radially along the tube in the circumferential direction, and / or there are thin sheets evenly spaced apart from each other on the tube. The advantage here is that the lowest possible thermal resistance can be achieved between the sheet-like annular tube and the housing component. More preferably, the corresponding annular tube is encapsulated and cast in the corresponding annular groove using a thermally conductive casting material.
[0038] Further advantages are provided by the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, particularly for purposes proposed and / or by comparison with the prior art, other reasonable combinations of features of the claims and / or individual claims and / or description features and / or drawings are possible. Attached Figure Description
[0039] The present invention will now be described in detail with reference to the schematic diagram:
[0040] exist Figure 1 The reducer with an optional additional cooling device is shown in a perspective view.
[0041] exist Figure 2 The reducer is shown open on the input side.
[0042] exist Figure 3 The image shows, in an exploded perspective, a particularly optional additional cooling pipe assembly arranged on the input side of the reducer.
[0043] exist Figure 4The cooling device of the reducer according to the invention is shown in an exploded perspective view.
[0044] exist Figure 5 The cooling device of the reducer according to the present invention is shown in a perspective view.
[0045] List of reference numerals in the attached diagram:
[0046] 1 housing component
[0047] 2 Input Interfaces
[0048] 3 Discharge Port
[0049] 4 bearing flange
[0050] 5 Input Connectors
[0051] 6 Discharge connector
[0052] 7 Flange area
[0053] 20 Interface Components
[0054] 21 Connectors
[0055] 22 Annular Groove
[0056] 30 ring pipe
[0057] 31. Interval Holder
[0058] 40 Protrusions
[0059] 41 Cover plate Detailed Implementation
[0060] As shown in the figure, the reducer has a housing 1, which provides a flange region 7 on the input side of the reducer and receives the bearing of the input shaft of the reducer.
[0061] On the side of housing 1 away from flange region 7, housing 1 is connected to bearing flange 4, which receives the bearing of output shaft, particularly hollow shaft.
[0062] Preferably, the reducer is designed as a coaxial reducer, especially a planetary gear reducer.
[0063] like Figure 2 As shown, the flange region 7 has annular grooves 22 arranged concentrically with each other.
[0064] The interface component 20 and the connector 21 are arranged sequentially in the radial direction. Here, the interface component 20 is arranged radially outside the connector 21.
[0065] Semi-annular annular tubes 30 are received in the annular groove 22, and these annular tubes are connected to the corresponding connectors 21 at their end regions as viewed in the circumferential direction.
[0066] Here, each connector 21 connects the first semicircular ring tube 30 to the second semicircular ring tube 30, which is arranged radially inside the first semicircular ring tube and within the same circumferential angle range as the first semicircular ring tube.
[0067] In the remaining circumferential angle range outside the said circumferential angle range, each connector 21 also connects the third semicircular annular tube 30 to the fourth semicircular annular tube 30, which is arranged radially inside the third semicircular annular tube and within the same circumferential angle range as the third semicircular annular tube.
[0068] The input interface 2 allows the cooling medium to be input to the interface component 20 through a channel constructed in the housing component 1.
[0069] The interface component 20 is connected to two radially outermost annular tubes 30, which are connected to the interface component 20 by means of a first connector in a diametrically opposed manner.
[0070] Thus, in this way, the cooling medium, particularly water or oil, flows through the outermost radial annulus 30 within the first circumferential angle range, and then gradually flows through the innermost radial annulus in a correspondingly alternating flow direction—that is, particularly along the circumferential direction or against the circumferential direction—until it reaches the innermost radial annulus 30, which is designed as a complete ring. And thus the cooling medium flows back from the inner radial direction to the outermost radial direction through the semicircular annulus within another circumferential angle range until it reaches the outermost semicircular annulus 30, from where the cooling medium is diverted through the interface component 20 and through the channel constructed in the housing component 1 until it reaches the discharge interface 3.
[0071] In general, the cooling medium thus flows sequentially from the radial outside to the radial inside through the semi-annular ring tube 30 in the first half-circumference, until it reaches the substantially complete annular, radially innermost ring tube 30, and from there sequentially from the radial inside to the radial outside in the other half-circumference. Effective heat dissipation on the input side is achieved through this heat dissipation implemented in the flange region 7. Importantly, the input shaft bearing and the shaft seal ring arranged next to the bearing act as two main sources of heat loss.
[0072] The axial direction is parallel to the rotation axis of the input shaft, while the radial direction is referenced to the rotation axis of the input shaft. Similarly, the circumferential direction is also referenced to the rotation axis of the rotor shaft.
[0073] like Figure 4 and Figure 5 As shown, the cooling device according to the invention is implemented on the housing component.
[0074] Here, the cooling medium flows through the annular gap, and radially oriented protrusions 40 are arranged on the radially inner side of the annular gap. The protrusions generate turbulence in the cooling medium and thereby more effectively guide heat from the housing to the cooling medium.
[0075] The protrusions 40 are spaced apart from each other in the circumferential direction and are formed on the hollow cylindrical bearing receiving portion, and the protrusions protrude radially outward from the bearing receiving portion.
[0076] The cover plate 41 defines an annular gap radially outward. The cover plate 41 has regions arranged successively in the circumferential direction, with flanges constructed between these regions. These regions are preferably designed to be flat or preferably have at least one flat region. The regions and the regions immediately adjacent to them have non-zero angles, that is, they are not parallel.
[0077] The cover plate 41 is placed on the protrusion 40 and thus defines and restricts the space area for the cooling medium. The cover plate 41 is preferably welded to the protrusion 40.
[0078] An input interface 2 is arranged on the housing component, which is connected to a spatial area for cooling medium via a channel constructed in the housing component 1.
[0079] A discharge port 3 is arranged on the housing component, which is connected to a space area for cooling medium through a channel constructed in the housing component 1.
[0080] Therefore, the cooling of the reducer can be achieved through two cooling devices—either simultaneously or alternatively.
[0081] In the area not covered by the cover plate 41 along the circumferential direction, the annular gap is realized as an annular groove of the housing part, wherein the radial outer side of the hollow cylindrical bearing receiving part serves as the radial inner side of the annular gap.
[0082] In other embodiments of the invention, instead of welding, a plastic injection molded part is used to bond the cover plate 41 to the protrusion 40.
Claims
1. A speed reducer, the speed reducer having a housing and an input shaft, Its features are, An annular gap through which the cooling medium flows is constructed between the reducer's cover plate and the housing component—particularly the bearing receiving portion formed annularly and, more particularly, in a hollow cylindrical shape on the housing component. This annular gap circumferentially surrounds the hollow cylindrical bearing receiving portion formed on the housing component. In particular, the input shaft bearing is housed in a bearing receiving section. In particular, the bearing receiving part is a hollow cylindrical area formed by the housing component.
2. The reducer according to claim 1, Its features are, The housing components, particularly the bearing receiving portion, have protrusions that are spaced apart from each other circumferentially, and evenly spaced, and protrude radially outward from the bearing receiving portion toward the cover plate, particularly through the annular gap. And / or, The cover plate is placed flat on the protrusion. And / or, The cover plate and the protruding part are connected in a locking manner, especially by welding.
3. The speed reducer according to any one of the preceding claims, Its features are, The longest dimension of the corresponding protrusion is formed in the direction transverse to the flow direction and / or in the axial direction, particularly parallel to the rotation direction. In particular, the flow direction of the cooling medium, especially the main flow direction, is basically oriented in the circumferential direction.
4. The speed reducer according to any one of the preceding claims, Its features are, The axial width of the corresponding protrusion is smaller than the axial width of the annular gap.
5. The speed reducer according to any one of the preceding claims, Its features are, The annular gap is defined and / or covered radially outward by a cover plate.
6. The speed reducer according to any one of the preceding claims, Its features are, The cover plate consists of flat areas with folded edges arranged between these areas.
7. The speed reducer according to any one of the preceding claims, Its features are, The annular gap is arranged in the annular groove section within a circumferential angle range not covered by the cover plate. The annular groove section is formed in the housing part and surrounds the bearing receiving part circumferentially within the circumferential angle range.
8. The speed reducer according to any one of the preceding claims, Its features are, A flange region is formed on the input side of the housing component, and annular grooves are formed in this flange region, which are concentric with each other and arranged concentrically with the rotation axis of the input shaft. A semi-circular annular tube is received in the annular groove. In particular, connectors and interface components are arranged on the flange area of the housing component. In particular, by means of a threaded component screwed into a threaded hole in the flange region, the connector and interface component are pressed against the flange region respectively. In particular, the threaded parts pass through the connectors and interface components.
9. The speed reducer according to any one of the preceding claims, Its features are, Each of the connectors connects a semi-circular annular tube in the first half-circumference to an adjacent annular tube arranged radially inward relative to that annular tube. And / or, Each of the connectors connects a semi-circular annular tube to an adjacent annular tube arranged radially inward relative to that annular tube in the other half of the circumference. And / or, The interface component connects the first channel constructed in the housing component to the first opening of the first semi-annular ring tube on the outermost radial side.
10. The speed reducer according to any one of the preceding claims, Its features are, The interface component connects the second channel constructed in the housing to the first opening of the radially outermost second semi-annular ring tube.
11. The speed reducer according to any one of the preceding claims, Its features are, The innermost radial ring is constructed as a complete ring and is connected to the innermost radial connector.
12. The speed reducer according to any one of the preceding claims, Its features are, Spacer holders are arranged radially between the annular tubes. In particular, the spacer is pressed against the flange area by a threaded part screwed into a threaded hole in the flange area.
13. The speed reducer according to any one of the preceding claims, Its features are, The first channel leads into the input connector (5), and the second channel leads into the discharge connector (6).
14. The speed reducer according to any one of the preceding claims, Its features are, The first channel extends axially, particularly parallel to the axis of rotation of the input shaft, and passes through the housing component, especially through the radially projecting flange area on the housing component. And / or, The second channel extends axially, particularly parallel to the axis of rotation of the input shaft, and passes through the housing component, especially through the radially projecting flange area on the housing component. And / or, The flange area has a through bearing hole through which the input shaft passes. The input shaft bearing is received in the bearing bore.
15. The speed reducer according to any one of the preceding claims, Its features are, Each loop is designed as a thin-film loop. In particular, the circumferentially continuous fins protrude radially on the tube, and / or the fins are evenly spaced apart from each other on the tube.