Planet wheel limiting mechanism and industrial fan

Abstract

The utility model relates to a planet wheel limiting mechanism and an industrial fan, and belongs to the technical field of gears, the planet wheel limiting mechanism comprises a planet wheel shaft, the planet wheel shaft comprises a mounting part arranged in a planet carrier and used for mounting a planet wheel and a connecting part mounted on the planet carrier, and the connecting part penetrates to the outer side of the planet carrier; and the limiting assembly comprises a limiting piece fixedly installed on the outer side of the planet carrier and a limiting groove formed in the end of the connecting part, and the limiting piece is clamped in the limiting groove. The limiting piece is arranged on the planet carrier to be clamped and matched with the limiting groove in the planet wheel shaft to limit rotation of the planet wheel shaft and reverse movement of the planet wheel shaft on the planet carrier along the axis of the planet wheel shaft, so that the problem of gear abrasion caused by rotation and movement of the planet wheel shaft along the axis of the planet wheel shaft is solved, and the transmission efficiency loss is reduced; and the service life of the gear is prolonged.

Description

Technical Field

[0001] The utility model relates to a planetary gear limiting mechanism and an industrial fan, belonging to the technical field of gears. Background Art

[0002] Planetary gear systems are widely used in mechanical systems, especially in transmission systems and speed reducers. The input torque is transmitted to the planetary gears through the sun gear, and the planetary gears then transmit the torque to the external gear ring, thereby achieving different reduction ratios and torque outputs. As a result, they can withstand greater loads, and the load distribution is uniform, which helps to reduce wear and extend the service life.

[0003] However, in the actual application of existing planetary gears, the planetary gear shaft is prone to self-rotation or axial movement along the axis of the planetary gear shaft. As a result, when the planetary gear rotates, the friction between the gears increases, leading to easy wear of the gears. Moreover, the heat generated by the friction may cause the gear system to overheat, affecting performance and service life. In addition, the self-rotation and axial movement of the planetary gear shaft will cause a loss of transmission efficiency, especially in applications with large loads. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a planetary gear limiting mechanism and an industrial fan to solve the above problems.

[0005] To achieve the above object, the utility model provides the following technical solution: A planetary gear limiting mechanism, the planetary gear limiting mechanism includes:

[0006] A planetary gear shaft, including a mounting portion disposed within the planet carrier for mounting a planetary gear and a connecting portion mounted on the planet carrier, the connecting portion extending through to the outside of the planet carrier;

[0007] A limiting assembly, including a limiting member fixedly mounted on the outside of the planet carrier and a limiting groove disposed at the end of the connecting portion, the limiting member being engaged in the limiting groove to restrict the movement of the planetary gear shaft.

[0008] Further, a fixing member is provided at the end of the connecting portion, and the limiting groove is formed between the fixing member and the connecting portion.

[0009] Further, a semi-circular notch is formed at the end of the connecting portion, and the fixing member and the semi-circular notch enclose to form the limiting groove.

[0010] Further, the fixing member includes a fixing screw connected to the planetary gear shaft and a gasket sleeved on the fixing screw.

[0011] Further, a plurality of the planetary gear shafts are provided, and the limiting members are independently arranged in a one-to-one correspondence with the planetary gear shafts, or a plurality of limiting portions corresponding to the planetary gear shafts one by one are provided on one limiting member.

[0012] Further, three planetary gear shafts are provided, the limiting member is a triangular plate-like member, and the edges of the triangular plate-like member are clamped in the limiting grooves.

[0013] Further, mounting holes are provided near the three corners of the triangular plate-like member, and are fixed to the planetary carrier by fixing bolts.

[0014] This application also provides an industrial fan, including the planetary gear limiting mechanism as described above.

[0015] The beneficial effects of the present utility model are as follows: By providing a limiting member on the planetary carrier to be clamped and matched with the limiting groove on the planetary gear shaft, the rotation of the planetary gear shaft and the reverse movement along its own axis on the planetary carrier are restricted, thereby solving the problem of gear wear caused by the rotation of the planetary gear shaft and the movement along its own axis, reducing the loss of transmission efficiency, and prolonging the service life of the gear.

[0016] This application also provides an industrial fan. By providing the above planetary gear limiting mechanism, the problem of gear wear caused by the rotation of the planetary gear shaft and the movement along its own axis is solved, the loss of transmission efficiency is reduced, and the service life of the gear is prolonged.

[0017] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and to be implemented in accordance with the content of the description, the following takes the preferred embodiments of the present utility model and combines with the drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the planetary gear limiting mechanism shown in an embodiment of the present application.

[0019] Figure 2 is Figure 1 a schematic structural diagram of the planetary gear shaft in

[0020] Figure 3 is Figure 1 a schematic structural diagram of the limiting member in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following combines with the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0024] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Additionally, in the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.

[0025] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0026] Please refer to Figures 1 to 3, the planetary gear limiting mechanism shown in an embodiment of the present application. The planetary gear limiting mechanism includes a planetary gear shaft 20 and a limiting component 30. Among them, the planetary gear shaft 20 is installed on the planet carrier 10, and a planetary gear 40 is rotatably connected to the planetary gear shaft 20. A sun gear 50 is arranged inside the planetary gear 40, and a ring gear 60 is meshed and connected to the outside. In application, the planetary gear 40 can be driven to rotate by the sun gear 50, thereby driving the ring gear 60 to rotate. It is also possible to use the ring gear 60 as the input and the sun gear 50 as the output, which is not limited here.

[0027] The planetary gear shaft 20 includes a mounting portion 21 arranged inside the planet carrier 10 for mounting the planetary gear 40 and a connecting portion 22 mounted on the planet carrier 10. The connecting portion 22 penetrates to the outside of the planet carrier 10. In this embodiment, the planet carrier 10 includes a support seat 11 and a fixing plate 12 mounted on the support seat 11. A receiving cavity is formed between the support seat 11 and the fixing plate 12. The planetary gear and the sun gear 50 are arranged in the receiving cavity, and part of the planetary gear extends out of the receiving cavity to be connected to the inner core of the ring gear 60. Both ends of the planetary gear shaft 20 are respectively connected to the support seat 11 and the fixing plate 12 of the fixing plate 12, thereby improving the fixing effect on the planetary gear and improving the stability of the entire gear system. Of course, in other embodiments, the planet carrier 10 can also be a mounting plate fixed only to one end of the planetary gear shaft 20.

[0028] The limiting component 30 includes a limiting member 31 fixedly installed on the outside of the planet carrier 10 and a limiting groove arranged at the end of the connecting portion 22. The limiting member 31 is clamped in the limiting groove to limit the movement of the planetary gear shaft 20. The opening of the limiting groove is arranged along the radial direction of the planetary gear shaft 20. The limiting member 31 is stuck in the limiting groove and abuts against the inner wall surface of the limiting groove to limit the rotation of the planetary gear shaft 20 and the movement of the planetary gear shaft 20 along its own axis direction.

[0029] In an embodiment, a fixing member 32 is arranged at the end of the connecting portion 22, and the limiting groove is formed between the fixing member 32 and the connecting portion 22. The limiting groove is formed by enclosing the fixing member 32 and the connecting portion 22, which is convenient for adjusting the size of the limiting groove through the fixing member 32 to facilitate the installation or replacement of the limiting member 31.

[0030] In one embodiment, a semi-circular notch 221 is formed at the end of the connecting portion 22. The fixing member 32 and the semi-circular notch 221 enclose a limiting groove. The semi-circular notch 221 is formed by collapsing from the end of the connecting portion 22 along the axial direction. The fixing member 32 is buckled on the end of the connecting portion 22. The semi-circular notch 221 and the fixing member 32 enclose a limiting groove, and the inner wall surfaces of the semi-circular notch 221 and the fixing member 32 that face each other are flush with the outer surface of the planet carrier 10. The clamping member is clamped in the limiting groove, and the three inner wall surfaces of the limiting groove are in contact with the outer surface of the clamping member, thereby restricting the self-rotation or axial movement of the planet gear shaft 20 along its own axis. Of course, in other embodiments, the limiting groove can also be in other forms, such as a through groove arranged radially along the planet gear shaft 20. The self-rotation or axial movement of the planet gear shaft 20 is restricted by clamping a limiting block in the through groove and fixing both ends to the planet carrier 10, as long as the above effects can be achieved, and no specific limitation is made here.

[0031] In one embodiment, the fixing member 32 includes a fixing screw 321 connected to the planet gear shaft 20 and a gasket 322 sleeved on the fixing screw 321. A threaded hole is provided in the connecting portion 22 of the planet gear shaft 20. The gasket 322 is fixed to the connecting portion 22 of the planet gear shaft 20 by the screw 321. The gasket 322 and the semi-circular notch 221 enclose a limiting groove. With such a setting, it is convenient for installation and disassembly.

[0032] In one embodiment, a plurality of planet gear shafts 20 are provided. The limiting member 31 and the planet gear shafts 20 are independently arranged one-to-one, or a plurality of limiting portions corresponding to the planet gear shafts 20 are provided on one limiting member 31. Generally, multiple are provided in the planetary gear 40 transmission assembly, and the specific number can be set according to needs, and no specific limitation is made here. Therefore, the limiting member 31 can be separately provided according to the limiting grooves on the planet gear shafts 20, or can also be set as an integrally formed limiting member 31, and limiting portions are correspondingly provided on the limiting member 31.

[0033] In one embodiment, three planet gear shafts 20 are provided. The limiting member 31 is in the shape of a triangular plate. The edge 311 of the triangular plate is clamped in the limiting groove. By clamping the edge 311 of the triangular plate in the semi-circular limiting groove, the two semi-circular surfaces of the limiting groove are clamped on both sides in the thickness direction of the triangular plate, thereby restricting the axial movement of the planet gear shaft 20 along its own axis. The bottom surface of the limiting groove is attached to the side surface of the triangular plate to restrict the self-rotation of the planet gear shaft 20. The three edges 311 of the integrally formed triangular plate are used to limit the three planet gear shafts 20, reducing the processing difficulty and installation difficulty of the limiting member 31, and the limiting member 31 has higher strength and a more stable structure. Of course, in other embodiments, when the number of planet gear shafts 20 provided is greater than three, a corresponding number of polygonal plates can also be used as the limiting member 31.

[0034] In one embodiment, mounting holes 312 are provided near the three edges of the triangular plate-like member, and are fixed to the planet carrier 10 by fixing bolts 33. By providing the mounting holes 312 at the three edges of the triangular plate-like member and using the fixing bolts 33, the fixing bolts 33 are distributed in a triangular shape on the triangular plate-like member, making the triangular plate-like member more firmly fixed.

[0035] By providing a limiting member on the planet carrier to engage with the limiting groove on the planet wheel shaft, the rotation of the planet wheel shaft and its reverse movement along its own axis on the planet carrier are restricted, thus solving the problem of gear wear caused by the rotation and axial movement of the planet wheel shaft, reducing the loss of transmission efficiency, and prolonging the service life of the gear.

[0036] This application also provides an industrial fan, including the planet wheel limiting mechanism as described above. Specifically, the industrial fan further includes a motor, a fan blade, and a planetary gear transmission assembly. The motor is connected to the fan blade through the planetary gear transmission assembly to drive the fan blade to rotate, which is a prior art. The difference between the industrial fan provided in this application is that: the planetary gear transmission assembly includes the above-mentioned planet wheel limiting mechanism. By providing the above-mentioned planet wheel limiting mechanism connected between the motor and the fan blade, the problem of gear wear caused by the rotation and axial movement of the planet wheel shaft is solved, the loss of transmission efficiency is reduced, and the service life of the industrial fan is prolonged.

[0037] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0038] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A planetary gear limiting mechanism, characterized in that, The planetary gear limiting mechanism includes: A planetary gear shaft, which includes a mounting portion disposed within the planet carrier for mounting the planetary gears and a connecting portion mounted on the planet carrier, and the connecting portion penetrates to the outside of the planet carrier; A limiting assembly, which includes a limiting member fixedly mounted on the outside of the planet carrier and a limiting groove disposed at the end of the connecting portion, and the limiting member is clamped in the limiting groove to limit the movement of the planetary gear shaft.

2. The planetary gear limiting mechanism according to claim 1, characterized in that, A fixing member is disposed at the end of the connecting portion, and the limiting groove is formed between the fixing member and the connecting portion.

3. The planetary gear limit mechanism according to claim 2, characterized in that, A semi-circular notch is formed at the end of the connecting portion, and the fixing member and the semi-circular notch enclose to form the limiting groove.

4. The planetary gear limiting mechanism according to claim 3, characterized in that, The fixing member includes a fixing screw connected to the planetary gear shaft and a gasket sleeved on the fixing screw.

5. The planetary gear limit mechanism according to claim 3, characterized in that, A plurality of the planetary gear shafts are provided, and the limiting members are independently arranged in a one-to-one correspondence with the planetary gear shafts, or a plurality of limiting portions corresponding to the planetary gear shafts one by one are provided on one of the limiting members.

6. The planetary gear limit mechanism according to claim 5, characterized in that, Three of the planetary gear shafts are provided, the limiting member is in the shape of a triangular plate, and the edges of the triangular plate are clamped in the limiting groove.

7. The planetary gear limiting mechanism according to claim 6, characterized in that, Mounting holes are provided near the three corners of the triangular plate and are fixed to the planet carrier by fixing bolts.

8. An industrial fan, characterized in that, It includes the planetary gear limiting mechanism according to any one of claims 1 to 7.

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