A reduction gear having a reduction gear housing comprising a housing part and a cover part connected thereto

Abstract

The present invention relates to a reducer having a reducer housing, the reducer housing having a housing member and a cover member connected to the housing member, a bearing receiving portion formed on the housing member, the housing member having a flange region extending toward the cover member, particularly on its outer periphery, intersecting tabs extending toward the cover member formed on its inner side, and wall regions extending toward the cover member, particularly extending further than the tabs, formed on its inner side, these wall regions extending from one of the bearing receiving portions to the flange region.

Description

Technical Field

[0001] The present invention relates to a speed reducer having a speed reducer housing, the speed reducer housing having a housing component and a cover component connected to the housing component. Background Technology

[0002] As is well known, the reducer housing has a bearing receiving section for receiving the bearings of the reducer shaft.

[0003] A speed reducer is known as the closest prior art, as indicated by WO 2017 / 071 819 A1.

[0004] A reducer housing is known from WO 2015 / 076 722 A1. Summary of the Invention

[0005] Therefore, the object of the present invention is to improve a speed reducer, wherein high stability can be achieved with a compact structure.

[0006] According to the present invention, this objective is achieved in the reducer by the following features.

[0007] An important feature of this invention in the speed reducer is that the speed reducer has a speed reducer housing, the speed reducer housing having a housing component and a cover component connected to the housing component.

[0008] The housing component includes a bearing receiving portion.

[0009] The housing component has a flange region extending toward the cover component, which completely surrounds the outer periphery of the housing component.

[0010] Among them, the housing component has intersecting tabs extending toward the cover component on its inner side, and the tabs penetrate each other in a crisscrossing manner.

[0011] Specifically, a wall region extending toward the cover is formed on the inner side of the housing component. This wall region extends further toward the cover than the tab. These wall regions extend from one of the bearing receiving portions to the flange region.

[0012] In particular, the wall thickness of the corresponding wall region is less than the maximum extension dimension of the wall region in the direction extending from the corresponding bearing receiving part to the flange region, and the wall thickness of the corresponding wall region is less than the maximum extension dimension of the wall region in the axial direction, which is the direction parallel to the rotation axis of the shaft received in the bearing receiving part.

[0013] Advantageously, high stability can be achieved with minimal mass. This is because the tabs reinforce the housing components without requiring excessive mass. Furthermore, the wall regions provide reinforcement because they extend from the bearing receiving portion to the flange region of the housing component. This allows for further reinforcement, which can function independently of the tabs. Specifically, the wall regions do not extend parallel to the tabs. The tabs intersect each other, thus further enhancing stability. Preferably, the first type of tabs is arranged parallel to each other but spaced apart, and the second type of tabs is again arranged parallel to each other but spaced apart. However, the first and second types of tabs extend at an angle, creating intersection points on the housing component. These tabs preferably extend into the cover to the same extent, with the wall regions extending into the cover more than the tabs.

[0014] In an advantageous design, the corresponding bearing receiving portion has a substantially hollow cylindrical region into which the outer ring of the bearing on the reducer shaft can be inserted. Advantageously, the corresponding bearing receiving portion on the inner side of the housing extends toward the cover, particularly further than the wall region. The bearing receiving portion extends toward the cover on the inner side of the housing and has a hollow cylindrical region, within which radially inwardly extending receiving sections are constructed. Before the outer ring of the mating bearing is pushed in, i.e., inserted, these receiving sections extend radially inward only to such an extent that the protruding area can deform and be compressed in the circumferential direction or also axially.

[0015] The radial direction here is parallel to the axis of rotation of the shaft, which is rotatably supported in the bearing. The axial and circumferential directions are also referenced to this axis of rotation.

[0016] In a favorable design, radially inwardly extending receiving sections spaced apart in the circumferential direction are formed on the inner side of the hollow cylindrical region.

[0017] These receiving sections deform, especially when the outer ring is inserted. Advantageously, when the outer ring is inserted, the material is compressed, thus ensuring a gapless connection of the bearings.

[0018] In an advantageous design, the axial region covered by the receiving section of the corresponding bearing receiving part is adjacent to the axial region of the corresponding bearing receiving part that has a protrusion.

[0019] In this configuration, the protrusions on the inner side of the hollow cylindrical region extend radially inwards further than the receiving section, with the length of the radial inward extension of the protrusions being at least 10 times that of the radial inward extension of the receiving section. Advantageously, these protrusions function as axial stops, thus fixing the axial position.

[0020] In an advantageous design, the housing and / or cover are made of a material softer than the material used to make the bearing outer ring. Advantageously, deformation of the housing and / or cover material can occur without damaging the outer ring.

[0021] In an advantageous design, the housing and / or cover are made of zinc die casting. Advantageously, no machining is required. Therefore, no further machining is needed after the die casting manufacturing step—especially after the die casting process itself—particularly the bearing housing, and especially the bearing housing does not require machining.

[0022] In an advantageous design, raised portions—especially dome-shaped ones—are formed in the corresponding wall areas, particularly studs, which extend to an axial position, particularly to a position that is the same axial position for all the raised portions. Advantageously, an interface can be provided between the housing and the cover, thereby achieving a flat boundary.

[0023] In a favorable design, the raised portion of the housing extends further into the cover than the wall region of the housing.

[0024] In particular, the wall region of the housing component extends further into the cover than the joints of the housing component. Advantageously, these protrusions act as vibration nodes, thus reducing the number of possible vibration modes.

[0025] In an advantageous design, the adjacent bearing receiving parts are tangent to each other. This allows for increased rigidity.

[0026] In an advantageous design, the cover has a second flange region extending toward the housing member, the second flange region completely surrounding the outer periphery of the cover.

[0027] Among them, on the inner side of the cover, there are intersecting second tabs that extend toward the shell component.

[0028] Specifically, a second wall region extending toward the housing member is formed on the inner side of the cover, and this second wall region extends further toward the housing member than the second tab. These second wall regions extend from one of the second bearing receiving portions of the cover to the second flange region. Advantageously, this allows for improved rigidity of the cover because the tabs intersect and reinforce the walls of the cover.

[0029] In an advantageous design, the corresponding second bearing receiving portion has a substantially hollow cylindrical region into which the outer ring of another bearing of the reducer shaft can be inserted. Advantageously, the outer ring can achieve a precise fit through prominent material deformation.

[0030] In an advantageous design, radially inwardly extending second receiving segments spaced apart from each other in the circumferential direction are formed on the inner side of the hollow cylindrical region of the second bearing receiving portion, particularly for forming intermittent bearing receiving portions.

[0031] In particular, the second receiving section deforms when the outer ring of another bearing is inserted, especially undergoing elastic deformation or being in a state of elastic deformation. Advantageously, by deforming the material when the outer ring is inserted, the outer ring can be inserted in a precise fit.

[0032] In an advantageous design, the axial region covered by the second receiving section of the corresponding second bearing receiving part is adjacent to the axial region of the corresponding second bearing receiving part having the second protrusion.

[0033] In this design, the second protrusion on the inner side of the hollow cylindrical region of the cover extends radially inward further than the second receiving section, particularly at least ten times further. Advantageously, this allows for highly precise axial positioning of the outer ring, enabling the protrusion to act as an axial stop against the outer ring.

[0034] Therefore, precise centering is achieved not only in the cover but also in the housing through the receiving section, and axial position is generated by the protrusion.

[0035] In an advantageous design, second ridges—especially domed ones—are formed on the corresponding wall areas of the cover, and in particular, studs are formed. These second ridges extend to an axial position, and in particular to the same axial position for all the second ridges. Advantageously, the ridges enable a flat interface between the housing and the cover, and also suppress vibration modes. By acting as a reinforcing thickening of the corresponding wall areas, fewer vibration modes can develop.

[0036] In a favorable design, the raised portion of the cover extends further toward the housing than the wall area of ​​the cover.

[0037] In particular, the wall region of the cover extends further toward the housing than the second tab. Advantageously, these protrusions act as reinforcement and serve as nodes for vibration modes. Therefore, vibrational capacity, especially the formation of resonance, is suppressed.

[0038] This invention is not limited to the above-described combination of features. Those skilled in the art, particularly for the purposes described and / or those described in comparison with the prior art, will recognize other reasonable combinations of the above-described features and / or individual features described above and / or features described below and / or features in the accompanying drawings. Attached Figure Description

[0039] The invention will now be described in detail with reference to the accompanying drawings:

[0040] Figure 1 The diagram shows a top view of the housing component 1 of the reducer housing according to the present invention;

[0041] Figure 2 The rear view of housing 1 is shown, which is the opposite top view;

[0042] Figure 3 The image shows a perspective view of housing component 1;

[0043] Figure 4 The diagram shows a perspective view of the cover 40 of the reducer housing, which can be connected to the housing part 1 to form the reducer housing. Detailed Implementation

[0044] As shown in the attached figures, housing 1 has a through recess, i.e., a channel for the output shaft, so that the output shaft extends outward through the recess, i.e. through the channel 2.

[0045] The gear is connected to the output shaft in a manner that prevents relative rotation, and the gear can be driven by a gear that is connected to another shaft, especially an intermediate shaft, in a manner that prevents relative rotation.

[0046] Similarly, housing 1 also has a channel 4 for an input shaft, which can be connected to the rotor shaft of the motor in a manner that prevents relative rotation. Therefore, a geared motor can be formed from the motor and the reducer, and this geared motor can constitute a compact unit.

[0047] The bearings are mounted onto the shaft of the reducer, and these bearings are received in the bearing housing of the reducer housing.

[0048] For example, the intermediate shaft is supported in a rotatable manner by means of a bearing, which is received in a bearing receiving part 24 integrally formed on the housing 1, especially integrally formed with the housing 1.

[0049] The bearing—especially the outer ring of the bearing—is inserted into the hollow area of ​​the bearing receiving part until the axial stop formed by the protrusion 22.

[0050] The axial direction is defined here as parallel to the axis of rotation of the intermediate shaft received in the bearing.

[0051] The axial region covered by the protrusion 22 is adjacent to the axial region covered by the outer ring of the bearing.

[0052] To center and receive the bearing, radially inwardly extending receiving sections 30 are constructed on the inner wall of the hollow region of the bearing receiving portion 24. These receiving sections contact the outer ring. However, the outer ring does not contact the entire circumference of the bearing receiving portion, but only the receiving sections 30 spaced apart from each other in the circumferential direction. The contact surface between the outer ring and the receiving sections 30 is a portion of a cylindrical surface. When the outer ring is inserted into the bearing receiving portion 24, the radially inwardly protruding material regions of the receiving sections 24 deform, causing these radially inwardly protruding material regions to be squeezed apart substantially in the circumferential direction or against the circumferential direction. In this way, it is not necessary to process the receiving sections 24, and only a softer material than the outer ring needs to be used for the bearing receiving portion.

[0053] Preferably, the outer ring is made of steel, while the housing part 1 is made of zinc casting.

[0054] The protrusion 22 extends radially inward beyond the receiving section 24, and the length of the radial inward extension of the protrusion is at least 10 times that of the radial inward extension of the receiving section. This provides a reliable axial stop for the outer ring.

[0055] The cover 40 is placed on and connected to the housing 1. The gearbox housing formed in this way surrounds at least a portion of the internal space that can be filled with oil.

[0056] The housing cover has tabs 25 extending on its inner side—particularly toward the cover member 40—which are integrally, particularly as a single piece, constructed onto the housing member. These tabs 25 intersect each other. Preferably, the tabs 25 are regularly spaced apart from each other in two non-parallel directions.

[0057] Furthermore, a wall region 23 protruding from the inner side—especially toward the cover 40—is constructed on the inner side of the housing 1, extending from the corresponding bearing receiving portion 24 to the surrounding edge region of the housing 1, especially the flange region.

[0058] The surrounding edge area, especially the flange area, extends toward the cover 40 and is formed on the housing 1.

[0059] In the respective wall regions 23, raised portions 21, particularly studs, are formed pointing toward the cover. These raised portions 21 preferably all terminate at the same axial position. Therefore, these raised portions 21 extend exactly the same length in the axial direction. However, in the opposite direction of this axial direction, these raised portions respectively extend into the respective wall regions 23, which are formed on the housing 1 in a one-piece, particularly integral, manner, and especially together with the tab 25, the surrounding flange region, and the raised portions 22.

[0060] like Figure 4 As shown, the cover 40 also has intersecting tabs 25 and wall regions extending from the corresponding bearing receiving portion on the inside of the cover to the flange region protruding toward the housing 1, on which ridges, especially studs, are formed.

[0061] The pattern formed by the raised portion of the cover 40 is the same as the pattern formed by the raised portion of the housing 1.

[0062] Similarly, the bearing receiving portion formed on the cover 40 is also equipped with protrusions 22 spaced apart from each other in the circumferential direction, which are used to axially restrict the outer ring of another bearing of the shaft.

[0063] In addition, the inner wall of the bearing receiving part also has radially inwardly extending receiving sections, which deform when the outer ring is inserted, so that the protruding area flows in the circumferential direction or against the circumferential direction.

[0064] List of reference numerals in the attached diagram:

[0065] 1. Output shaft channel

[0066] 2. Housing components

[0067] 3 Flange area

[0068] 4. Input axis channels

[0069] 21. Raised areas, especially studs

[0070] 22. Protrusion

[0071] 23 Wall Area

[0072] 24 Bearing receiving section

[0073] 25 stitched images

[0074] 26 Surrounding flange area

[0075] 30 Reception Section

[0076] 40. Cover piece.

Claims

1. A speed reducer having a speed reducer housing, the speed reducer housing having a housing component and a cover component connected to the housing component, A bearing receiving portion is formed on the housing component. Its features are, The housing component has a flange region extending toward the cover component, which completely surrounds the outer periphery of the housing component. On the housing component, intersecting tabs are formed on the inner side of the housing component, extending toward the cover component. The tabs penetrate each other in an intersecting manner. A wall region extending toward the cover is formed on the inner side of the housing component. This wall region extends further toward the cover than the tab. Each wall region extends from one of the bearing receiving portions to the flange region. The wall thickness of the corresponding wall region is less than the maximum extension dimension of the wall region in the direction extending from the corresponding bearing receiving portion to the flange region, wherein the wall thickness of the corresponding wall region is less than the maximum extension dimension of the wall region in the axial direction, that is, the direction parallel to the rotation axis of the shaft received in the bearing receiving portion. The corresponding bearing receiving portion has a generally hollow cylindrical area into which the outer ring of the bearing on the reducer shaft can be inserted. On the inner side of the hollow cylindrical region, there are radially inwardly extending receiving segments spaced apart in the circumferential direction, which deform when the outer ring is inserted. The axial region covered by the receiving section of the corresponding bearing receiving part is adjacent to the axial region of the corresponding bearing receiving part with the protrusion.

2. The reducer according to claim 1, Its features are, The protrusion on the inner side of the hollow cylindrical region extends further radially inward than the receiving section.

3. The reducer according to claim 2, characterized in that, The radial inward extension of the protrusion is at least 10 times the radial inward extension of the receiving section.

4. The reducer according to any one of claims 1 to 3, Its features are, The housing and / or cover are made of a softer material than the material used to make the bearing outer ring.

5. The reducer according to any one of claims 1 to 3, Its features are, The housing and / or cover are made of zinc castings.

6. The reducer according to any one of claims 1 to 3, Its features are, Raised portions are formed on the corresponding wall areas, and the raised portions extend to an axial position.

7. The reducer according to claim 6, characterized in that, The raised portion is domed and / or has a stud.

8. The reducer according to claim 6, characterized in that, This axial position is the same for all raised sections.

9. The reducer according to claim 6, Its features are, The raised portion of the housing extends further toward the cover than the wall area of ​​the housing.

10. The reducer according to any one of claims 1 to 3, Its features are, The bearing receiving parts that are adjacent to each other are tangent to each other.

11. The reducer according to any one of claims 1 to 3, Its features are, The cover has a second flange region extending toward the housing member, the second flange region completely surrounding the outer periphery of the cover. On the cover, on the inner side, there are intersecting second tabs that extend toward the housing. A second wall region extending toward the housing is formed on the inner side of the cover. The second wall region extends further toward the housing than the second tab. The second wall region extends from one of the second bearing receiving portions of the cover to the second flange region.

12. The reducer according to claim 11, Its features are, The corresponding second bearing receiving portion has a substantially hollow cylindrical area, into which the outer ring of another bearing of the reducer shaft can be inserted.

13. The reducer according to claim 12, Its features are, On the inner side of the hollow cylindrical region of the second bearing receiving portion, radially inwardly extending second receiving segments spaced apart from each other in the circumferential direction are formed to create an intermittent bearing receiving portion. The second receiving section deforms when the outer ring of the other bearing is inserted.

14. The reducer according to claim 13, characterized in that, The second receiving section undergoes elastic deformation or is in a state of elastic deformation when the outer ring of the other bearing is inserted.

15. The reducer according to claim 13, Its features are, The axial region covered by the second receiving section of the corresponding second bearing receiving part is adjacent to the axial region of the corresponding second bearing receiving part having the second protrusion. In particular, the second protrusion on the inner side of the hollow cylindrical area of ​​the cover extends further inward in the radial direction than the second receiving section.

16. The reducer according to claim 15, characterized in that, The length of the second protrusion extending inward in the radial direction is at least ten times the length of the second receiving section extending inward in the radial direction.

17. The reducer according to claim 11, Its features are, A second protrusion is formed on the corresponding second wall region of the cover, and the second protrusion extends to an axial position.

18. The reducer according to claim 17, characterized in that, The second bulge is arched and / or has a stud.

19. The reducer according to claim 17, characterized in that, This axial position is the same for all second ridges.

20. The reducer according to claim 17, Its features are, The second raised portion of the cover extends further toward the housing than the second wall region of the cover.

Images