A new bearing arrangement for a single-screw gearbox

Abstract

This utility model discloses a novel bearing arrangement for a single-screw gearbox, comprising a housing, a gear disposed within the housing, a thrust assembly assembled with the housing, and an output shaft disposed within the thrust assembly and assembled with the gear. A positioning extension extends from one end of the thrust assembly near the housing, and a corresponding mounting limiting hole is provided on the housing. The thrust assembly is tightly fitted to the housing and engaged within the mounting limiting hole via the positioning extension. A bearing mounting groove is provided in the center of the positioning extension, and a first bearing, mounted on the outside of the output shaft, is disposed within the bearing mounting groove. This utility model eliminates the need for additional machining of the output stop dimension, ensuring concentricity and saving machining costs.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a single-screw gearbox with a new bearing arrangement. Background Technology

[0002] Currently, existing single-screw gearboxes typically employ a separate thrust assembly structure, using a combination of thrust bearings, ball bearings, and cylindrical bearings. This facilitates the assembly and adjustment of the thrust assembly and shaft as a whole before installation into the gearbox, eliminating the need to disassemble the entire gearbox for disassembly and maintenance. However, due to structural and manufacturing considerations, existing single-screw gearboxes require a separate output stop at the external port of the thrust assembly. Because of the separate assembly of the thrust assembly and gearbox, after overall installation and adjustment, the thrust assembly's weight or vibration often causes sagging, making it difficult to return the machined stop to its correct dimensional accuracy and position. Therefore, additional machining of the output stop is usually necessary, which is time-consuming, labor-intensive, increases costs, and may also lead to poor concentricity. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a new bearing arrangement type of single screw gearbox, which does not require additional machining of the output stop size, ensures concentricity, and saves machining costs.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A new type of bearing arrangement for a single-screw gearbox includes a housing, a gear disposed within the housing, a thrust pack assembled with the housing, and an output shaft disposed within the thrust pack and assembled with the gear.

[0006] The thrust pack has a positioning extension formed on one end face near the box body, and the box body has a corresponding installation limiting hole. The thrust pack is closely attached to the box body and is engaged in the installation limiting hole through the positioning extension.

[0007] The positioning extension has a bearing mounting groove in the center, and a first bearing is installed in the bearing mounting groove on the outside of the output shaft.

[0008] Furthermore, a bearing positioning platform is provided in the middle of the inner wall of the thrust pack, and a second bearing is provided on the outer side of the output shaft. The second bearing is positioned and engaged with the bearing positioning platform.

[0009] Furthermore, the outer end of the thrust pack is provided with an output stop, and the inner end of the output stop is provided with a third bearing mounted on the outer side of the output shaft.

[0010] Furthermore, the outer ring of the thrust pack is assembled and fixed to the housing by screws.

[0011] Furthermore, the outer edge of the positioning extension is chamfered.

[0012] Furthermore, the end of the output shaft away from the thrust pack is assembled with the housing via a fourth bearing.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects:

[0014] 1. This utility model designs a positioning extension at the end of the thrust pack and correspondingly opens a mounting limit hole on the housing. This allows the thrust pack to be inserted into the mounting limit hole for secure positioning when it is tightly assembled with the housing. Combined with the tightening of the outer ring screws, the thrust pack can be more stably and firmly assembled on the housing, preventing it from sagging due to gravity or shaking. It also eliminates the need for additional processing of the output stop size, ensuring concentricity and dimensional accuracy of the output stop, and saving processing costs.

[0015] 2. By designing a positioning extension on the thrust pack and opening a bearing mounting groove, this utility model can perfectly assemble the first bearing. Without affecting the assembly of the original parts, it can also ensure the concentricity of the thrust pack, the first bearing and the output shaft, thereby increasing the rigidity of the thrust pack.

[0016] 3. The design of the bearing positioning platform on the inner wall of the thrust pack ensures the coaxiality and accuracy of the second bearing and the output shaft after assembly. Combined with the positioning fit of the first bearing and the bearing mounting groove, the coaxiality of the output shaft installed in the thrust pack is higher, and the coaxiality is also guaranteed after it is installed in the housing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structural assembly of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the thrust pack structure according to an embodiment of the present invention;

[0019] Figure 3 This is a partial structural diagram of the box body according to an embodiment of the present utility model;

[0020] Among them, 1. housing; 10. mounting limit hole; 2. thrust packer; 20. positioning extension; 200. bearing mounting groove; 201. chamfer; 21. bearing positioning platform; 22. output stop; 3. output shaft; 4. first bearing; 5. second bearing; 6. third bearing; 7. fourth bearing; 8. gear; 9. screw. Detailed Implementation

[0021] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] like Figure 1-3 As shown, this embodiment provides a single-screw gearbox with a novel bearing arrangement. It mainly consists of a housing 1, a thrust pack 2, an output shaft 3, a first bearing 4, a second bearing 5, a third bearing 6, a fourth bearing 7, and a gear 8. The gear 8 is housed within the housing 1 and engages with other transmission components. The thrust pack 2 is fitted tightly to the left end of the housing 1. One end of the output shaft 3 is coaxially fitted into the thrust pack 2 via the first bearing 4, the second bearing 5, and the third bearing 6, while the other end of the output shaft 3 is coaxially fitted with the gear 8 via a key and then fitted to the housing 1 via the fourth bearing 7. This improves the overall coaxiality of the assembly, ensuring the rotation and support of the output shaft 3.

[0023] To prevent sagging and wobbling after the thrust pack 2 and output shaft 3 are installed together in the housing 1, in this embodiment, a positioning extension 20 is formed on the end face of the thrust pack 2 near the housing 1. A corresponding mounting limiting hole 10 is provided on the housing 1. The thrust pack 2 is tightly attached to the housing 1 and engaged within the mounting limiting hole 10 through the positioning extension 20. The outer ring of the thrust pack 2 is then fixed to the housing 1 by screws 9. This stable positioning ensures that the thrust pack 2 is more stably and securely mounted on the housing 1, preventing sagging due to gravity or wobbling. It also eliminates the need for additional machining of the output stop 22, ensuring concentricity and dimensional accuracy of the output stop 22, and saving machining costs.

[0024] Meanwhile, in this embodiment, a bearing mounting groove 200 is provided in the center of the positioning extension 20, and a first bearing 4 is provided in the bearing mounting groove 200 and mounted on the outside of the output shaft 3. This allows the first bearing 4 to be mounted just right, ensuring the concentricity of the thrust pack 2, the first bearing 4 and the output shaft 3 without affecting the original parts assembly, thus increasing the rigidity of the thrust pack 2.

[0025] To ensure the assembly accuracy of the output shaft 3, a bearing positioning platform 21 is provided in the middle of the inner wall of the thrust pack 2 in this embodiment. The second bearing 5 is assembled on the outside of the output shaft 3, and the second bearing 5 is positioned and engaged with the bearing positioning platform 21. At the same time, an output stop 22 is provided at the outer end of the thrust pack 2, and a third bearing 6, which is assembled on the outside of the output shaft 3, is installed at the inner end of the output stop 22. This ensures the coaxiality and accuracy of the second bearing 5 and the output shaft 3 after assembly. Combined with the positioning fit between the first bearing 4 and the bearing mounting groove 200, the coaxiality of the output shaft 3 when installed in the thrust pack 2 is higher, and the coaxial consistency is also guaranteed after it is installed in the housing 1.

[0026] In addition, to facilitate the insertion of the thrust pack 2 into the housing 1, a chamfer 201 is provided on the outer edge of the positioning extension 20 in this embodiment.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A single screw gearbox of the new bearing arrangement type, characterised in that: Includes a housing (1), a gear (8) disposed inside the housing (1), a thrust pack (2) assembled with the housing (1), and an output shaft (3) disposed inside the thrust pack (2) and assembled with the gear (8); The thrust pack (2) has a positioning extension (20) extending from one end face near the box (1), and the box (1) has a corresponding installation limiting hole (10). The thrust pack (2) is close to the box (1) and is engaged in the installation limiting hole (10) through the positioning extension (20). The positioning extension (20) has a bearing mounting groove (200) in the center, and a first bearing (4) is installed in the bearing mounting groove (200) on the outside of the output shaft (3).

2. A single helical gearbox according to claim 1, characterised in that: The thrust pack (2) has a bearing positioning platform (21) in the middle of its inner wall, and a second bearing (5) is provided on the outer side of the output shaft (3). The second bearing (5) is positioned and engaged with the bearing positioning platform (21).

3. A single helical gearbox of the new bearing arrangement type according to claim 1, characterized in that: The outer end of the thrust pack (2) is provided with an output stop (22), and the inner end of the output stop (22) is provided with a third bearing (6) mounted on the outer side of the output shaft (3).

4. A single helical gearbox according to claim 1, characterised in that: The outer ring of the thrust pack (2) is assembled and fixed to the housing (1) by screws (9).

5. A single helical gearbox of the new bearing arrangement type according to claim 1, characterized in that: The outer edge of the positioning extension (20) is chamfered (201).

6. A single helical gearbox according to claim 1, characterized in that: The end of the output shaft (3) away from the thrust pack (2) is assembled with the housing (1) via the fourth bearing (7).

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