Threading pipe assembly for gear box and gear box

Abstract

The utility model relates to a threading pipe assembly for a gearbox, which comprises a threading pipe (1) which extends along the axial direction and is provided with a connecting end (11) positioned on one side of the axial direction; the threading pipe (1) is provided with a connecting end (11), the pipe sleeve (2) is provided with a matching end (21) matched with the connecting end (11) of the threading pipe (1), the circumferential surface of the connecting end (11) and the circumferential surface of the matching end (21) make contact with each other so that the threading pipe (1) can be matched with the pipe sleeve (2), and at the position where the threading pipe (1) is matched with the pipe sleeve (2), the circumferential surface of the matching end (21) makes contact with the circumferential surface of the connecting end (11). And a fastener (3) penetrates through the connecting end (11) and the matching end (21) along the radial direction of the threading pipe (1) so as to fasten the threading pipe (1) and the pipe sleeve (2) together. According to the utility model, the universality of the threading pipe assembly applied to various gearboxes can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a threading pipe assembly for a gear box and a gear box provided with the threading pipe assembly. BACKGROUND

[0002] A wind power generation device generally comprises a gear box and a generator which are drivingly connected to each other. In order to transmit power and control signals, etc., a threading pipe is provided in a hollow component such as a hollow shaft and a gear of the gear box, and the threading pipe extends along the hollow component to a side of the gear box close to the generator or further extends into the generator. Various cables such as power cables and signal cables are arranged in the threading pipe to establish a connection between the gear box and the generator.

[0003] When used for different gear boxes and generators, the interface between the threading pipe and the gear box or the generator can need to have different sizes, which reduces the versatility of a single model of the threading pipe.

[0004] In addition, for different gear boxes, the diameter and length of the threading pipe used can be different. When a very long threading pipe is needed, it is time-consuming and laborious to arrange cables in a single very long threading pipe, and it is inconvenient for daily maintenance.

[0005] Therefore, it is necessary to design an improved threading pipe assembly to solve one or more of the above technical defects. SUMMARY

[0006] To overcome at least one defect of the prior art, the utility model provides a threading pipe assembly for a gear box with high versatility.

[0007] According to one aspect of the utility model, a threading pipe assembly for a gear box is provided, which comprises:

[0008] a threading pipe extending in an axial direction and having a connecting end on one axial side; and

[0009] a sleeve having a mating end matched with the connecting end of the threading pipe,

[0010] wherein the circumferential surface of the connecting end and the circumferential surface of the mating end are in contact with each other to match the threading pipe and the sleeve, and at the position where the threading pipe and the sleeve are matched, a fastener passes through the connecting end and the mating end in a radial direction of the threading pipe to fasten the threading pipe and the sleeve together.

[0011] According to one embodiment, a protective cover is provided on the outer side of the fastener to prevent the fastener from falling off, and the protective cover extends around the threading pipe in a circumferential direction of the threading pipe.

[0012] According to one embodiment, the protective cover comprises a positioning part and a protective part connected to each other, the positioning part is positioned on the wire-through pipe, and the protective part covers the fastener.

[0013] According to one embodiment, the positioning part and the protective part are formed as an integral piece, the positioning part is formed as an annular plate extending in the radial direction of the wire-through pipe and is positioned on the wire-through pipe around the wire-through pipe, an axial one-side surface of the positioning part abuts against the matching end, and an opposite axial other-side surface abuts against a stopper arranged on the wire-through pipe, and the protective part is formed as a cylinder extending in the axial direction from a radial outer end of the positioning part.

[0014] According to one embodiment, the stopper is configured as a snap spring arranged in an annular groove on the surface of the wire-through pipe.

[0015] According to one embodiment, the matching end further comprises an axial positioning part abutting against an axial end face of the connecting end.

[0016] According to one embodiment, the axial positioning part is formed as a single annular stepped part extending in the circumferential direction of the pipe sleeve, or is formed as a plurality of stepped parts distributed at intervals in the circumferential direction of the pipe sleeve.

[0017] According to one embodiment, the matching end is located on the radial outer side of the wire-through pipe, and an inner circumferential surface of the matching end is in contact with an outer circumferential surface of the connecting end; or the matching end is located on the radial inner side of the wire-through pipe, and an outer circumferential surface of the matching end is in contact with an inner circumferential surface of the connecting end.

[0018] According to one embodiment, the wire-through pipe assembly comprises at least one of the following features:

[0019] A sealing member for preventing lubricating oil in the gear box from entering the inside of the wire-through pipe is arranged between the circumferential surface of the connecting end and the circumferential surface of the matching end in contact with each other;

[0020] The wire-through pipe is formed as a straight tubular body, and the pipe sleeve is directly connected to an axial end of the tubular body;

[0021] The plurality of fasteners are distributed in a circumferential direction around the connecting end and the matching end in a central symmetrical manner relative to the central axis of the wire-through pipe; and

[0022] The fasteners are completely embedded in the connecting end and the matching end.

[0023] The utility model also relates to a kind of gear box, it includes hollow component, and the hollow component is equipped with above-mentioned wire-through pipe assembly.

[0024] The threading pipe assembly according to the utility model can be applied to various gearboxes, thereby enhancing the versatility of the threading pipe assembly. BRIEF DESCRIPTION OF DRAWINGS

[0025] Specific details of various embodiments according to the utility model are illustrated in the drawings and the following description, and other features and advantages of the utility model will be apparent from the description and drawings.

[0026] Figure 1 is a schematic partial cross-sectional view of a threading pipe assembly for a gearbox according to one embodiment of the utility model. DETAILED DESCRIPTION

[0027] The specific embodiments according to the utility model and their variants will be described in detail below in conjunction with the drawings.

[0028] For the convenience of description, spatial relative terms "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "top", "bottom" and the like are used to define various components and their connection relationship in this document. However, this is not a limiting sense. When the placement orientation of the components changes, these spatial relative relationships can also be reversed or changed without affecting the protection scope of the utility model.

[0029] Figure 1 is a schematic partial cross-sectional view of a threading pipe assembly for a gearbox according to one embodiment of the utility model. The gearbox can be a gearbox for wind power generation, or can be a gearbox with other purposes. When used for wind power generation, the threading pipe assembly is installed in the gearbox, or further extends from the gearbox into the generator, so as to thread a cable in the threading pipe to transmit power or control signals and the like.

[0030] As Figure 1 shown, the threading pipe assembly includes an axially extending threading pipe 1 and a pipe sleeve 2 fixed at one of the connecting ends 11 of the threading pipe 1. The pipe sleeve 2 can be an adapter for connecting the threading pipe 1 to a gearbox or a generator associated structure or another threading pipe, or can be another threading pipe itself connected with the threading pipe 1. In this way, the versatility of the threading pipe assembly in application to various models of gearboxes can be enhanced, or a threading pipe 1 of a desired length can be formed by connecting multiple threading pipes 1 to each other by means of the pipe sleeve 2 to facilitate threading a cable in the threading pipe 1 or maintenance of the threading pipe 1.

[0031] The conduit 1 is formed as an axially extending, elongated tube, which can be a straight tube with a constant diameter along the axial direction. Depending on the needs, the conduit 1 can also be formed with other configurations. Various cables can pass through the interior of the conduit 1, and the conduit 1 has a connecting end 11 that connects to the sleeve 2. This connecting end 11 refers to the end of the conduit 1. When the conduit 1 is formed as a straight tube, this connecting end 11 refers to the axial end of the conduit 1. The sleeve 2 includes a mating end 21 that connects to the connecting end 11 of the conduit 1.

[0032] The mating end 21 of the sleeve 2 is fitted onto the connecting end 11 of the conduit 1 and extends circumferentially around the connecting end 11. That is, the circumferential surface of the mating end 21 of the sleeve 2 and the circumferential surface of the connecting end 11 of the conduit 1 are in contact with each other, thus the sleeve 2 and the conduit 1 mate with each other. For example, in... Figure 1 In the illustrated embodiment, the mating end 21 of the sleeve 2 is fitted onto the outer circumferential surface of the connecting end 11 of the conduit 1, and the inner circumferential surface of the mating end 21 mates with the outer circumferential surface of the conduit 1. Furthermore, to prevent lubricating oil from the gearbox from entering the conduit 1 through the gap between the mating end 21 of the sleeve 2 and the connecting end 11 of the conduit 1, one or more sealing elements 6, such as O-rings, can be provided between the inner circumferential surface of the mating end 21 and the outer circumferential surface of the conduit 1.

[0033] To prevent the sleeve 2 from detaching from the conduit 1, fasteners 3, such as bolts, are installed on the mating end 21 of the sleeve 2 and the connecting end 11 of the conduit 1. These fasteners 3 can be inserted radially from the outer side of the sleeve 2 into both the sleeve 2 and the conduit 1 to secure the sleeve 2 to the conduit 1. It is conceivable that multiple fasteners 3 be provided between the sleeve 2 and the conduit 1. These fasteners 3 can be centrally symmetrically distributed relative to the central axis A of the conduit 1 along its circumference, preferably evenly distributed along its circumference. To avoid interference with other components in the gearbox or generator, preferably, the head of the fastener 3 is fully embedded within the outer circumferential surface of the sleeve 2 at a certain distance or flush with the outer circumferential surface of the sleeve 2. Multiple seals 6 can be respectively provided on both axial sides of the fastener 3 between the inner circumferential surface of the mating end 21 of the sleeve 2 and the outer circumferential surface of the conduit 1; however, they can also be provided only on one axial side of the fastener 3, such as... Figure 1 The left side of fastener 3 shown.

[0034] although Figure 1 The diagram shows the sleeve 2 fitted onto the outer circumferential surface of the connecting end 11 of the conduit 1. However, it is conceivable that the sleeve 2 could also be inserted radially inward into the conduit 1 to mate with the inner circumferential surface of the connecting end 11. In this case, with... Figure 1The shown embodiment can likewise be fastened by means of the fastening elements 3 being passed through the bushing 2 and the threading tube 1 in the radial direction of the threading tube 1.

[0035] During operation of the gear box, the fastening elements 3 provided on the threading tube assembly can become loose. If the fastening elements 3 are located inside the gear box or the (medium speed) generator, the fastening elements 3 becoming loose and falling out can pose a great risk. In order to prevent the fastening elements 3 from becoming loose and falling out, as shown, a protective cover 4, such as a spacer ring, is provided around the fastening elements 3, such that the fastening elements 3 cannot fall out of the threading tube assembly. Figure 1

[0036] The protective cover 4 is formed as a ring, which is arranged around the circumferential surface of the threading tube 1 and covers the fastening elements 3. The protective cover 4 can comprise a positioning portion 41 and a protective portion 42, which are preferably formed as one piece. It is, however, conceivable that the positioning portion 41 and the protective portion 42 are formed as separate components and are connected to one another. The positioning portion 41 and the protective portion 42 are preferably formed as a whole with a U-shaped cross section, the positioning portion 41 and the protective portion 42 forming the bottom and the side of the protective cover 4, respectively.

[0037] The positioning portion 41 of the protective cover 4 can be formed as a ring-shaped plate and extends from a radial inner end (radial one end) as shown to a radial outer end (radial other end) as shown. The radial inner end of the positioning portion 41 abuts against the outer circumferential surface of the threading tube 1. The axial one side of the radial inner end, i.e. the side facing the mating end 21 of the bushing 2, abuts against the surface of the mating end 21 of the bushing 2, the opposite axial other side abutting against a stop element 5, such as a circlip, to prevent axial displacement. The stop element 5 is, for example, formed as a ring and can be arranged in a ring-shaped recess on the outer circumferential surface of the threading tube 1. Figure 1 Figure 1 The protective portion 42 of the protective cover 4 can be formed as a ring-shaped cylinder extending in the axial direction from the radial outer end of the positioning portion 41, which extends around the circumferential surface of the threading tube 1 or the bushing 2 to prevent the fastening elements 3 from falling out. This protective portion 42 can completely cover the fastening elements 3 or can cover only a portion of the fastening elements 3, as long as it prevents the fastening elements 3 from falling out.

[0038] In order to achieve axial positioning of the bushing 2 relative to the threading tube 1 and to facilitate the connection between the two, an axial positioning portion 22, such as a step, can be provided on the mating end 21 of the bushing 2, which abuts against the axial end face of the threading tube 1, such that

[0039] In order to achieve axial positioning of the bushing 2 relative to the threading tube 1 and to facilitate the connection between the two, an axial positioning portion 22, such as a step, can be provided on the mating end 21 of the bushing 2, which abuts against the axial end face of the threading tube 1, such that Figure 1 ​​The inner circumferential surface of the pipe sleeve 2 and the axial positioning portion 22 are both in contact with the through pipe 1. The axial positioning portion 22 can be formed as a single complete or partial annular step portion around the inner circumferential surface of the pipe sleeve 2, or can be formed as a plurality of step portions spaced apart on the inner circumferential surface of the pipe sleeve 2 in the circumferential direction of the pipe sleeve 2. In the case where the fitting end 21 of the pipe sleeve 2 is inserted into the inside of the through pipe 1, the axial positioning portion 22 can be correspondingly formed on the outer circumferential surface of the pipe sleeve 2. In this case, the outer circumferential surface of the pipe sleeve 2 and the axial positioning portion 22 are respectively in contact with the inner circumferential surface and the axial end surface of the through pipe 1. In addition, the axial positioning portion 22 of the pipe sleeve 2 also increases the contact area between the through pipe 1 and the pipe sleeve 2, so that the connection between the two is more stable and reliable.

[0040] The utility model also relates to a kind of gearboxes, and the above-mentioned through pipe assembly is installed in the gearbox. For example, hollow parts such as hollow shaft and gear are provided in the gearbox, and the through pipe assembly is arranged in the hollow parts.

[0041] The above detailed description with reference to the drawings describes specific embodiments according to the utility model, but the utility model is not limited to the above specific structure, and covers various modifications and equivalent features. Those skilled in the art can make various changes without departing from the scope of the utility model.

Claims

1. A conduit assembly for a gearbox, characterized in that, The conduit assembly includes: a conduit (1) extending axially and having a connecting end (11) located on one side of the axial direction; and The sleeve (2) has a mating end (21) that mates with the connecting end (11) of the conduit (1). The circumferential surface of the connecting end (11) and the circumferential surface of the mating end (21) contact each other to make the conduit (1) and the sleeve (2) fit together, and at the position where the conduit (1) and the sleeve (2) fit together, the fastener (3) passes through the connecting end (11) and the mating end (21) along the radial direction of the conduit (1) to fasten the conduit (1) and the sleeve (2) together.

2. The conduit assembly according to claim 1, characterized in that, A protective cover (4) is provided on the outside of the fastener (3) to prevent the fastener (3) from falling off. The protective cover (4) extends around the conduit (1) in the circumferential direction.

3. The conduit assembly according to claim 2, characterized in that, The protective cover (4) includes a positioning part (41) and a protective part (42) connected to each other. The positioning part (41) is positioned on the conduit (1), and the protective part (42) covers the fastener (3).

4. The conduit assembly according to claim 3, characterized in that, The positioning part (41) and the protective part (42) are formed as a single piece. The positioning part (41) is formed as an annular plate extending radially along the conduit (1) and positioned around the conduit (1) on the conduit (1). One axial side surface of the positioning part (41) abuts against the mating end (21), and the opposite axial side surface abuts against the stop member (5) provided on the conduit (1). The protective part (42) is formed as a cylindrical shape extending axially from the radial outer end of the positioning part (41).

5. The conduit assembly according to claim 4, characterized in that, The stop (5) is constructed as a retaining ring, which is disposed in an annular groove on the surface of the conduit (1).

6. The conduit assembly according to claim 1, characterized in that, The mating end (21) also includes an axial positioning part (22), which abuts against the axial end face of the connecting end (11).

7. The conduit assembly according to claim 6, characterized in that, The axial positioning part (22) is formed as a single annular step part extending circumferentially along the sleeve (2), or as a plurality of step parts spaced apart circumferentially in the sleeve (2).

8. The conduit assembly according to any one of claims 1-7, characterized in that, The mating end (21) is located radially outside the conduit (1), and the inner circumferential surface of the mating end (21) is in contact with the outer circumferential surface of the connecting end (11); or, the mating end (21) is located radially inside the conduit (1), and the outer circumferential surface of the mating end (21) is in contact with the inner circumferential surface of the connecting end (11).

9. The conduit assembly according to any one of claims 1-7, characterized in that, The conduit assembly includes at least one of the following features: A seal (6) is provided between the circumferential surface of the connecting end (11) and the circumferential surface of the mating end (21) to prevent lubricating oil in the gearbox from entering the inside of the conduit (1); The conduit (1) is formed as a straight tubular body, and the sleeve (2) is directly connected to the axial end of the tubular body; The plurality of fasteners (3) are distributed circumferentially around the connecting end (11) and the mating end (21) in a centrally symmetrical manner with respect to the central axis (A) of the conduit (1); and The fastener (3) is fully embedded in the connecting end (11) and the mating end (21).

10. A gearbox comprising a hollow component, characterized in that, The hollow component contains a conduit assembly as described in any one of claims 1-9.

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