A series reducer partition sealing installation structure

Abstract

This utility model discloses a partitioned sealing installation structure for a series reducer, comprising a reducer housing, a hollow shaft rotatably disposed within the reducer housing, and a gear shaft with one end assembled inside the hollow shaft; a planetary gear set is assembled at the end of the gear shaft away from the hollow shaft, and a connecting flange is installed on the outer side of the planetary gear set; an output flange is installed at the end of the reducer housing near the planetary gear set, and the inner ring of the output flange is provided with a first oil seal fitted on the hollow shaft and a second oil seal fitted on the gear shaft, and the outer side of the output flange is assembled with the connecting flange. This utility model, while maintaining the original sealing performance, uses existing standard parts for partitioned sealing installation, reducing axial space, making the structure more compact, and lowering costs.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a partitioned and sealed installation structure for a series speed reducer. Background Technology

[0002] Parallel or vertical shaft speed reducers, planetary speed reducers, cycloidal speed reducers, and other types of speed reducers each have their advantages and are suitable for different industries. However, each type of speed reducer also has limitations and is not suitable for all situations. Combined speed reducers can utilize the advantages of each type to create a speed reducer more suitable for a specific industry, better driving the stable operation of equipment.

[0003] While K-series helical gear reducers are compact and have vertical input / output, they suffer from a limited speed ratio range, making it difficult to maintain a compact structure even at high torque outputs. Planetary gear reducers offer a wide speed ratio range, compact structure, and high output torque, but their longer axial dimensions at high speed ratios limit installation space. Therefore, combining K-series and planetary gear reducers addresses their respective weaknesses, maximizing their strengths and minimizing their disadvantages to create a more compact reducer with a wider speed ratio range and higher torque, enabling smooth operation of larger equipment within limited space. However, existing K-series and planetary gear reducer combinations cannot achieve a truly compact axial space in certain installation configurations. This is because tandem reducers require partitioned sealing, preventing the two chambers from being fully integrated. Conventional partitioned sealing structures use separate seals for each reducer, but due to variations in reducer type, the axial distance between the two independent seals is relatively long, making a back-to-back compact structure impossible. Using non-standard customized designs to solve these problems increases costs, makes delivery times unpredictable, and hinders long-term stable production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a partitioned sealing installation structure for a series reducer. While ensuring the original sealing performance, it uses existing standard parts to process the partitioned sealing installation, which reduces the axial space, makes the structure more compact, and reduces the cost.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A series-type speed reducer partition sealing installation structure includes a speed reducer housing, a hollow shaft rotatably disposed within the speed reducer housing, and a gear shaft with one end assembled inside the hollow shaft. A planetary gear set is fitted to the end of the gear shaft away from the hollow shaft, and a connecting flange is installed on the outside of the planetary gear set; An output flange is installed at one end of the reducer housing near the planetary gear set. The inner ring of the output flange is provided with a first oil seal fitted on the hollow shaft and a second oil seal fitted on the gear shaft. The outer side of the output flange is assembled with a connecting flange.

[0006] Furthermore, the gear shaft has a stepped end face, which is in close contact with the hollow shaft end face.

[0007] Furthermore, the output flange end face extends beyond the hollow shaft end face.

[0008] Furthermore, an oil seal hole is provided in the center of the output flange, the first oil seal is disposed in the oil seal hole and sleeved on the outside of the hollow shaft, and the second oil seal is disposed in the oil seal hole and sleeved on the outside of the gear shaft.

[0009] Furthermore, the outer ring of the output flange is assembled with the connecting flange by a first bolt and a first elastic washer.

[0010] Furthermore, a baffle and an elastic retaining ring are provided inside the hollow shaft.

[0011] Furthermore, the baffle is assembled to the end of the gear shaft via a second bolt and a second elastic washer at its center.

[0012] Furthermore, the gear shaft is assembled with a hollow shaft via a flat key.

[0013] Furthermore, a cap is provided at the outer end of the hollow shaft.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects: 1. This utility model connects the internal structures of a K-series reducer and a planetary reducer in series. By tightly fitting the stepped end face of the gear shaft to the end face of the hollow shaft, the output flange is installed so that the internal oil seal hole simultaneously covers both the hollow shaft and the gear shaft. This allows the first and second oil seals to share a single oil seal hole. The first oil seal is fitted onto the hollow shaft, and the second oil seal is fitted onto the gear shaft. This back-to-back installation creates a partitioned sealing effect, preventing lubricating oil leakage from both oil chambers and achieving safe series connection of the two reducer structures. Simultaneously, while maintaining the original sealing performance, using only one output flange occupying axial space and forming a partitioned seal reduces the overall axial space, making the structural connection more compact and lowering costs, which is beneficial for long-term stable production.

[0015] 2. This utility model only requires processing the output flange of the standard part and combining it with two oil seals to achieve partitioned sealing. The connecting flange reduces the axial size and eliminates the need to open oil seal holes. In this way, the cost of parts materials can be reduced while reducing the axial installation space.

[0016] 3. By installing the first oil seal and the second oil seal back to back, this utility model can effectively achieve reliable and stable partitioned sealing of the series reducer even if the subsequent assembly of the gear shaft and hollow shaft is loose. It is also not sensitive to the machining accuracy of the hollow shaft end face, and the structure is more compact and safer. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 2 for Figure 1 A magnified view of a portion of the central structure; The components are as follows: 1. Gearbox housing; 2. Hollow shaft; 3. Gear shaft; 30. Stepped end face; 4. Output flange; 40. Oil seal hole; 5. First oil seal; 6. Second oil seal; 7. Planetary gear set; 8. Connecting flange; 9. First bolt; 10. First elastic washer; 11. Baffle; 12. Elastic retaining ring; 13. Second bolt; 14. Second elastic washer; 15. Cover. Detailed Implementation

[0018] 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.

[0019] like Figure 1 , 2 As shown, this embodiment provides a series-type reducer partitioned sealing installation structure, which mainly consists of a reducer housing 1, a hollow shaft 2, a gear shaft 3, and a planetary gear set 7. Specifically, the left side is a K-series reducer, and the right side is a planetary reducer. The two are assembled together, internally connected in series to form a transmission connection. The hollow shaft 2 is the output shaft of the K-series reducer, and the gear shaft 3 is the input shaft of the planetary reducer. The hollow shaft 2 is rotatably mounted inside the reducer housing 1 via bearings. The left end of the gear shaft 3 extends into the hollow shaft 2 and is assembled via a flat key to form a series transmission. The right end of the gear shaft 3, with its toothed section, is fitted with a planetary gear set 7. A connecting flange 8 is installed on the outside of the planetary gear set 7 for support and stability.

[0020] To achieve partitioned sealing of the oil chambers on both sides, this embodiment installs an output flange 4 at the end of the reducer housing 1 near the planetary gear set 7. The output flange 4 is annular, and its outer ring is assembled with the connecting flange 8. An oil seal hole 40 is provided in the center of the output flange 4. A first oil seal 5 and a second oil seal 6 are installed in the oil seal hole 40. The first oil seal 5 is sleeved on the outside of the hollow shaft 2, and the second oil seal 6 is sleeved on the outside of the gear shaft 3. At the same time, the gear shaft 3 has a stepped end face 30, which is tightly attached to the end face of the hollow shaft 2 during assembly. To ensure the installation of the second oil seal 6, the end face of the output flange 4 extends beyond the end face of the hollow shaft 2, as shown in the reference. Figure 1 ,2 In this configuration, the first oil seal 5 and the second oil seal 6 are installed back-to-back, located on opposite sides of the stepped end face 30. The first oil seal 5 is positioned to the left within the oil seal hole 40, fitting snugly against the right side of the outer side of the hollow shaft 2; the second oil seal 6 is positioned to the right within the oil seal hole 40, flush with the end face of the output flange 4, fitting snugly against the left side of the outer side of the large diameter of the gear shaft 3. This design, through the tight fit between the stepped end face 30 of the gear shaft 3 and the end face of the hollow shaft 2, allows the output flange 4 to be installed so that the internal oil seal hole 40 simultaneously covers both the hollow shaft 2 and the gear shaft 3. This allows the first oil seal 5 and the second oil seal 6 to share a single oil seal hole 40. Their back-to-back installation creates a partitioned sealing effect, preventing lubricating oil leakage from both oil chambers and ensuring safe series connection of the two reducer structures. Simultaneously, while maintaining the original sealing performance, using only one output flange 4 to occupy axial space and form a partitioned seal reduces the overall axial space, making the structural connection more compact and lowering costs, which is beneficial for long-term stable production.

[0021] Specifically, in this embodiment, the outer ring of the output flange 4 is assembled to the connecting flange 8 via a first bolt 9 and a first elastic washer 10. Figure 1 , 2 As can be seen, this embodiment only requires processing the standard output flange 4 and combining it with two oil seals to achieve partitioned sealing. Furthermore, the connecting flange 8 has a smaller axial size and does not require oil seal holes. In this way, the cost of parts materials can be reduced while reducing the axial installation space.

[0022] To ensure the stability of the series mechanism, a baffle 11 and an elastic retaining ring 12 are provided inside the hollow shaft 2 in this embodiment. A second bolt 13 and a second elastic washer 14 are provided on the outer side of the center of the baffle 11. A threaded hole is provided at the end of the gear shaft 3. The second bolt 13 passes through the baffle 11 and is assembled with the threaded hole at the end of the gear shaft 3, thereby locking the gear shaft 3. In addition, a cover 15 is installed on the outer end of the hollow shaft 2 to protect the internal parts.

[0023] In addition, this embodiment uses the back-to-back close installation of the first oil seal 5 and the second oil seal 6. Even if the subsequent assembly of the gear shaft 3 and the hollow shaft 2 becomes loose, a reliable and stable tandem reducer partition seal can be effectively achieved. It is also not sensitive to the machining accuracy of the end face of the hollow shaft 2, and the structure is more compact and safer.

[0024] 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.

[0025] 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 partitioned bulkhead seal mounting structure for a tandem reduction gear characterized by: It includes a reducer housing (1), a hollow shaft (2) rotatably disposed in the reducer housing (1), and a gear shaft (3) with one end assembled in the hollow shaft (2); The end of the gear shaft (3) away from the hollow shaft (2) is equipped with a planetary gear set (7), and a connecting flange (8) is installed on the outside of the planetary gear set (7). The reducer housing (1) is equipped with an output flange (4) at one end near the planetary gear set (7). The inner ring of the output flange (4) is provided with a first oil seal (5) fitted on the hollow shaft (2) and a second oil seal (6) fitted on the gear shaft (3). The outer side of the output flange (4) is assembled with a connecting flange (8).

2. The partitioned seal mounting structure for a serial type speed reducer according to claim 1, characterized in that: The gear shaft (3) has a stepped end face (30), which is in close contact with the end face of the hollow shaft (2).

3. The partitioned seal mounting structure for a serial type speed reducer according to claim 2, characterized in that: The end face of the output flange (4) extends beyond the end face of the hollow shaft (2).

4. The partitioned seal mounting structure for a serial type speed reducer according to claim 3, characterized in that: The output flange (4) has an oil seal hole (40) in the center. The first oil seal (5) is located in the oil seal hole (40) and is sleeved on the outside of the hollow shaft (2). The second oil seal (6) is located in the oil seal hole (40) and is sleeved on the outside of the gear shaft (3).

5. The partitioned seal mounting structure for a serial type speed reducer according to claim 1, characterized in that: The outer ring of the output flange (4) is assembled with the connecting flange (8) by the first bolt (9) and the first elastic washer (10).

6. A partitioned containment seal mounting structure for a serial type speed reducer according to claim 1, characterized in that: The hollow shaft (2) is provided with a baffle (11) and an elastic retaining ring (12).

7. A partitioned containment seal mounting structure for a tandem type speed reducer according to claim 6, characterized in that: The baffle (11) is assembled to the end of the gear shaft (3) via a second bolt (13) and a second elastic washer (14) at its center.

8. The partitioned seal mounting structure for a serial type speed reducer according to claim 7, characterized by: The gear shaft (3) is assembled with the hollow shaft (2) by a flat key.

9. The partitioned seal mounting structure for a serial type speed reducer according to claim 7, characterized by: The hollow shaft (2) is provided with a cap (15) at its outer end.

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