Shaft assembly

Abstract

The present disclosure provides a shaft assembly comprising: a shaft having an end; the bearing seat is arranged around the end part in the circumferential direction; the bearing is arranged between the end part and the bearing seat; the end cover is arranged on the outer side of the end part in the axial direction and is fixedly connected with the bearing seat; the sealing piece is arranged on the inner side of the end part in the axial direction and is arranged between the bearing seat and the shaft in the radial direction; wherein the bearing seat, the end cover and the sealing piece form a closed space surrounding the bearing, and the closed space is filled with a lubricant. The shaft assembly is good in integrity and does not need to be assembled by a user, the closed space, containing the bearing, of the shaft assembly is filled with the lubricating agent, the risks of sealant leakage and pollutant invasion are avoided, the working efficiency of the shaft assembly is improved, the service life of the shaft assembly is prolonged, and parts do not need to be disassembled and replaced in the service period of the whole shaft assembly.

Description

Technical Field

[0001] The present disclosure provides a shaft assembly. Background Art

[0002] Shafts are required in various mechanical equipment, especially in vehicles, machine tools and other equipment. Take a baler as an example. Its special structure requires various shafts, such as cam follower shafts. Moreover, since the working environment of the baler is very harsh, the sealing, lubricity and service life of the rotating parts related to the cam follower shaft (such as bearings, etc.) are extremely high.

[0003] Common cam follower assemblies generally include bearing seats, bearings, etc., among which bearings usually require strict sealing and are particularly easy to damage. In the prior art, the various components of this type of cam follower assembly are provided to users in the form of individual parts and assembled by the user. However, due to factors such as harsh working environment and poor sealing, the various parts of the cam follower assembly are often damaged, so maintenance and replacement are required, which will also seriously affect the working efficiency and life of the cam follower assembly.

[0004] Therefore, there is a need in the art for a solution that can effectively prevent leakage and contamination while improving the working efficiency and life of the cam follower shaft assembly. Summary of the invention

[0005] In response to the above-mentioned problems and needs, the present disclosure proposes a new technical solution, which solves the above-mentioned problems and brings other technical effects by adopting the following technical features.

[0006] The present disclosure provides a shaft assembly, comprising: a shaft having an end; a bearing seat arranged around the end in a circumferential direction; a bearing arranged between the end and the bearing seat; an end cover arranged on the outer side of the end in an axial direction and fixedly connected to the bearing seat; a seal arranged on the inner side of the end in an axial direction and between the bearing seat and the shaft in a radial direction; wherein the bearing seat, the end cover and the seal form a closed space surrounding the bearing, and the closed space is filled with lubricant.

[0007] The shaft assembly provided by the present invention has good integrity and does not require user assembly. The enclosed space of the shaft assembly containing the bearing is filled with lubricant, which not only avoids the risks of sealant leakage and contaminant intrusion, but also improves the working efficiency and life of the shaft assembly. There is no need to disassemble and replace parts during the entire service life of the shaft assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a shaft assembly according to a preferred embodiment of the present disclosure. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0010] Compared to the embodiments shown in the drawings, feasible implementations within the scope of the present disclosure may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0011] Unless otherwise defined, the technical terms or scientific terms used herein shall have the common meanings understood by those skilled in the art in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components may be one or more; similarly, words such as "one", "the", "said" and the like do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" and the like mean that the element or object appearing before the word includes the element or object listed after the word and its equivalent, without excluding other elements or objects. Words such as "install", "set", "connect" or "connected" and the like are not limited to physical or mechanical installation, setting, connection, but may include electrical installation, setting, connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate the relative orientation relationship when the device is in use or the orientation relationship shown in the drawings. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0012] For ease of explanation, the direction of the rotation axis of the shaft is referred to as the axial direction, and the direction perpendicular to the axial direction is referred to as the radial direction. The term "inward / inward" refers to the direction toward the inside of the component, and conversely, the term "outward / outward" refers to the direction toward the outside of the component. In addition, in different embodiments, the same reference numerals are used to refer to components with the same or similar structures and functions.

[0013] The present disclosure provides a shaft assembly, which is particularly suitable for a cam follower shaft of a grass baler. Of course, the shaft assembly of the present disclosure can also be used for a rotating shaft on other mechanical equipment.

[0014] See also Figure 1 In a preferred embodiment, the shaft assembly includes: a shaft 1 (for example, a cam follower shaft), a bearing seat 2, a bearing 31, an end cover 4, and a seal 5.

[0015] Specifically, the shaft 1 has an end portion 10, ie, a terminal portion of the shaft, and the bearing seat 2 is arranged around the end portion 10 in a circumferential direction.

[0016] The bearing 31 is disposed between the end 10 of the shaft 1 and the bearing seat 2, thereby providing rotation support for the relative rotation between the end 10 of the shaft 1 and the bearing seat 2. It should be understood that for a general shaft assembly, there is no particular limitation on the type and number of bearings. Figure 1 Taking the shaft 1 shown as an example, it may preferably include only one bearing 31, or may include an additional bearing 32. The two bearings 31, 32 may be tapered roller bearings, which are juxtaposed in the axial direction in a face-to-face or back-to-back manner.

[0017] The end cover 4 is arranged on the outer side of the end portion 10 in the axial direction ( Figure 1 The end cover 4 and the seal 5 are disposed on the inner side of the end 10 in the axial direction and between the bearing seat 2 and the shaft 1 in the radial direction. According to the present disclosure, the bearing seat 2, the end cover 4 and the seal 5 form a closed space 6 surrounding the bearing 31, and the closed space is filled with lubricant.

[0018] Thus, the present disclosure provides a shaft assembly, which is provided to the user after being fully assembled. The end cover and the seal provide a good seal in the axial direction, and the bearing is completely enclosed in the closed space. At the same time, any suitable type of lubricant can be filled in the closed space as needed, so that the various components included in the bearing, the end of the shaft, and other components related to rotation (described later) are completely immersed in the lubricant, so that these rotating components are fully lubricated and isolated from the external environment. For users using the shaft assembly, the overall working efficiency and life of the shaft assembly are greatly improved, and there is no need to frequently replace the various components included in the shaft assembly.

[0019] Preferably, the end portion 10 includes a threaded portion 101 on a side close to the end cover 4, and the shaft assembly further includes a fastening nut 7 screwed to the threaded portion 101, and the fastening nut 7 directly or indirectly abuts against the inner ring of the bearing 31. The fastening nut can provide a clearance adjustment function for the bearing in the axial direction.

[0020] Further preferably, the shaft assembly also includes a locking pin 8, which is inserted between the fastening nut 7 and the threaded portion 101 in a manner of destroying the thread, so as to lock the fastening nut 7 and the threaded portion 101 together. The prior art does not provide such a fixing method, because in the shaft assembly of the prior art, bearings and other components are often damaged due to lubrication leakage, external pollution intrusion, etc., so it is often necessary to replace bearings and other components, which requires frequent removal of the fastening nut from the shaft. Since the present disclosure provides a shaft assembly that is fully assembled and fully lubricated before being provided to the user, the shaft, bearings and other components are not subject to the risks of lubrication leakage, pollution intrusion, etc., and the entire shaft assembly does not need to be disassembled, bearings replaced, etc., so after the locking pin is inserted in the above manner, the shaft and the fastening nut cannot be loosened or disengaged, which not only strengthens the firm connection between the two, but also further improves the working efficiency and life of the shaft assembly.

[0021] Further preferably, the uninserted portion 81 of the locking pin 8 can be bent and abut against the end surface 102 of the fastening nut 7 or the end portion 10. Figure 1 As shown, the uninserted portion 81 is bent and abuts against the end surface 102 of the end portion 10 of the shaft, which further strengthens the locking effect of the locking pin 8, and the uninserted portion 81 will not interfere with the installation of the end cover.

[0022] Further preferably, a washer 9 may be provided between the fastening nut 7 and the inner ring of the bearing 31. The washer may help to adjust the gap and fix the fastening nut 7 and the inner ring of the bearing 31.

[0023] Preferably, the seal 5 may be a cassette seal, such as cassette seals such as MUD11 and MUD6 produced by SKF.

[0024] The cassette seal preferably comprises: a first frame 51, which is in interference fit with the inner wall of the bearing seat 2; a sealing portion, which is formed as a whole with the first frame 51, and the sealing portion comprises at least one sealing lip 52 ( Figure 1 In a preferred embodiment, the seal comprises two sealing lips 52; a second frame 53, which is in interference fit with the shaft 1, and the at least one sealing lip 52 abuts against the second frame 53. With this cassette seal, sufficient sealing can be provided for the closed space 6, thereby preventing external contamination from entering the closed space 6 while preventing the lubricant in the closed space 6 from leaking.

[0025] Further preferably, the sealing lip 52 is oriented so that when contaminants enter from the gap between the frames 51 and 53 , the sealing lip 52 is pressed against the second frame 53 , thereby further strengthening the fit between the sealing lip 52 and the second frame 53 and more effectively preventing contaminants from entering the enclosed space 6 .

[0026] Further preferably, the first frame may be made of plastic or steel, and the sealing lip may be rubber, which is formed into one piece with the first frame by vulcanization, for example.

[0027] Preferably, the shaft 1 includes a shoulder 11 protruding in the radial direction, and the second skeleton 53 is in interference fit with the outer peripheral surface of the shoulder 11. By providing the shoulder 11 protruding in the radial direction, not only the closed space 6 is shielded, but also a mounting surface is provided for the cassette seal, so that the size of the cassette seal can be reduced.

[0028] Preferably, as mentioned above, the shaft assembly may further include another bearing 32, which is juxtaposed with the bearing 31 in the axial direction. Furthermore, the shaft assembly may further include a gap adjustment sleeve 13 disposed between the inner ring of the bearing 31 and the inner ring of the other bearing 32.

[0029] Preferably, the bearing seat 2 may further include an annular flange 21, which is sandwiched between the outer ring of the bearing 31 and the outer ring of the other bearing 32. The annular flange can separate the outer rings of the two bearings and provide positioning for the two bearings at the outer rings to facilitate the installation of the two bearings.

[0030] In addition, the shaft shoulder 11 protruding in the radial direction as mentioned above can also be arranged to abut against the inner ring of the other bearing 32 .

[0031] Preferably, the end cover 4 can be fixedly connected to the bearing seat 2 in various suitable ways, for example, it can be fixedly connected in one of the following ways: interference fit, threaded connection, welding, bonding, etc.

[0032] In summary, the present disclosure provides a shaft assembly, in which all components are assembled before being provided to users, and the shaft assembly includes a closed space pre-filled with lubricant to provide sufficient lubrication for bearings and other components therein. Since the shaft assembly has good sealing performance and good integrity, the components have higher working efficiency and longer service life during the shaft assembly process, so the phenomenon of component damage is greatly reduced, and frequent replacement and maintenance are not required.

[0033] The exemplary implementation modes of the present disclosure are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A shaft assembly comprising: A shaft (1) having an end (10); A bearing seat (2) is arranged around the end portion (10) in a circumferential direction; A bearing (31) is arranged between the end portion (10) and the bearing seat (2); An end cover (4) is arranged on the outer side of the end portion (10) in the axial direction and is fixedly connected to the bearing seat (2); A sealing member (5) is arranged on the inner side of the end portion (10) in the axial direction and between the bearing seat (2) and the shaft (1) in the radial direction; The bearing seat (2), the end cover (4) and the sealing member (5) form a closed space (6) surrounding the bearing (31), and the closed space (6) is filled with lubricant.

2. The shaft assembly of claim 1, wherein: The end portion (10) includes a threaded portion (101) on a side close to the end cover (4), and the shaft assembly also includes a fastening nut (7) screwed to the threaded portion (101), and the fastening nut (7) directly or indirectly abuts against the inner ring of the bearing (31).

3. The shaft assembly as described in claim 2 further includes a locking pin (8), which is inserted between the fastening nut (7) and the threaded portion (101) in a manner of destroying the thread so as to lock the fastening nut (7) and the threaded portion (101) together.

4. The shaft assembly of claim 3, wherein: The uninserted portion (81) of the locking pin (8) is bent and abuts against the end surface (102) of the fastening nut (7) or the end portion (10).

5. The shaft assembly of claim 2, wherein: A washer (9) is arranged between the fastening nut (7) and the inner ring of the bearing (31).

6. The shaft assembly according to any one of claims 1 to 5, wherein: The sealing element (5) is a box-type sealing element.

7. The shaft assembly of claim 5, wherein: The cassette seal comprises: The first frame (51) is interference-fitted with the inner wall of the bearing seat (2); A sealing portion formed integrally with the first frame (51), the sealing portion comprising at least one sealing lip (52); The second skeleton (53) is interference-fitted with the shaft (1), and the at least one sealing lip (52) abuts against the second skeleton (53).

8. The shaft assembly according to claim 7, wherein the shaft (1) comprises a shaft shoulder (11) protruding in a radial direction, and the second skeleton (53) is interference-fitted with an outer peripheral surface of the shaft shoulder (11).

9. The shaft assembly according to any one of claims 1 to 5, further comprising another bearing (32), the other bearing (32) being juxtaposed with the bearing (31) in the axial direction.

10. The shaft assembly of claim 9, wherein: The shaft assembly further comprises a clearance adjustment sleeve (13) arranged between the inner ring of the bearing (31) and the inner ring of the other bearing (32); and / or The bearing seat (2) comprises an annular flange 21, which is clamped between the outer ring of the bearing (31) and the outer ring of the other bearing (32); and / or The shaft (1) comprises a shoulder (11) protruding in the radial direction, and the shoulder (11) abuts against the inner ring of the other bearing (32).

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