Gearbox limiting device
Through the design of the gear box limiting device, the combination of rotating bearings and elastic parts is used to solve the heat treatment and machining problems of the output shaft of the twin-screw gear box, and high stability and high reliability connection are achieved, reducing axial twitching.
Patent Information
- Application Number
- CN202422963730.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The output shaft length-to-diameter ratio of the twin-screw gear box is large, which leads to difficulty in heat treatment and machining, and the stability of spline connection is insufficient, which makes it easy to cause axial squirming, affecting reliability.
The gear box limiting device is adopted, including a box, a first rotating shaft, a second rotating shaft, a rotating bearing, a first connecting member, a second connecting member, a first thrust bearing and an elastic member. Through the rotating connection and axial limiting structure, an integral structure is formed, and the elastic member and a thrust bearing are used to reduce axial bounce and improve connection stability.
The axial limit of the first rotating shaft and the second rotating shaft is realized, the connection stability and reliability are improved, the possibility of axial twitching is reduced, and the stability and reliability of the overall structure are enhanced.
Smart Images
Figure CN223257464U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear boxes, in particular to a gear box limiting device. Background Art
[0002] The output shaft of a twin-screw gearbox is relatively long, with an aspect ratio typically exceeding 15. This makes heat treatment and machining of the output shaft challenging and increases manufacturing costs. Existing output shafts typically employ a split design, where a splined shaft is splined to the gear shaft to form the output shaft, thus reducing the difficulty of heat treatment and machining. However, the splined connection between the gear shaft and the spline shaft is limited, resulting in limited stability. Furthermore, the spline shaft, due to its inherent structural and spatial constraints, is not easily axially restrained, making the output shaft susceptible to axial movement during gearbox operation, leaving room for improvement in reliability. Utility Model Content
[0003] The purpose of the utility model is to provide a gear box limiting device, which can realize axial limiting of a first rotating shaft and a second rotating shaft, improve connection stability and have higher reliability.
[0004] To achieve this purpose, the present invention adopts the following technical solutions:
[0005] A gear box limiting device, comprising:
[0006] Box;
[0007] A first rotating shaft and a second rotating shaft are coaxially arranged, wherein the second rotating shaft is rotatably connected to the housing via a rotating bearing, and a connecting hole is axially penetrated in the second rotating shaft;
[0008] a first connecting member, passing through the connecting hole, one end of the first connecting member being fixedly connected to the first rotating shaft;
[0009] a second connecting member connected to the other end of the first connecting member and configured to lock the first connecting member and the second rotating shaft;
[0010] a first thrust bearing, disposed on the second rotating shaft and located in a bearing seat of the rotating bearing;
[0011] An elastic member extends parallel to the axial direction of the second rotating shaft, one end of the elastic member abuts against the first thrust bearing, and the other end abuts against the bearing seat.
[0012] Optionally, the first rotating shaft is provided with a thread groove, and the first connecting member is provided with a thread segment threadedly connected to the thread groove.
[0013] Optionally, the second connecting member includes a nut and a washer, the other end of the first connecting member is passed through the washer and threadedly connected to the nut, and the washer is clamped between the nut and the second rotating shaft.
[0014] Optionally, the gear box limiting device further includes a limiting plate, the first connecting member passes through the limiting plate, and the limiting plate is clamped between the second connecting member and the second rotating shaft.
[0015] Optionally, the first race of the first thrust bearing abuts against the limit plate.
[0016] Optionally, a first limiting groove is provided on the bearing seat, an open end of the first limiting groove is arranged toward the first thrust bearing, and part of the elastic member is located in the first limiting groove and abuts against the bottom of the first limiting groove.
[0017] Optionally, there are multiple first limiting grooves, and the multiple first limiting grooves are arranged at intervals along the circumference of the bearing seat. There are multiple elastic members, and the multiple elastic members are arranged in a one-to-one correspondence with the multiple first limiting grooves.
[0018] Optionally, the gearbox limiting device further includes a second thrust bearing, a rotating gear is provided on the second rotating shaft, and the second thrust bearing is arranged between the rotating bearing and the rotating gear.
[0019] Optionally, the bearing seat abuts against the second thrust bearing.
[0020] Optionally, the first rotating shaft and the second rotating shaft are spline-connected.
[0021] Beneficial effects of the utility model:
[0022] The utility model provides a gearbox limiting device, which includes a housing, a first rotating shaft, a second rotating shaft, a rotating bearing, a first connecting member, a second connecting member, a first thrust bearing and an elastic member. The first rotating shaft and the second rotating shaft are coaxially arranged, and the second rotating shaft is rotatably connected to the housing through the rotating bearing, so that the first rotating shaft and the second rotating shaft can rotate around the same axis relative to the housing. Moreover, by providing the rotating bearing, the second rotating shaft can be axially limited. A connecting hole is axially penetrated in the second rotating shaft, and the first connecting member is inserted into the connecting hole. One end of the first connecting member is fixedly connected to the first rotating shaft, and the second connecting member is connected to the other end of the first connecting member, which can lock the first connecting member and the second rotating shaft, so that the first rotating shaft and the second rotating shaft form an integral structure, thereby improving the connection stability between the two. The axial limiting effect on the second rotating shaft is used to achieve the axial limiting of the integral structure. The first thrust bearing is arranged on the second rotating shaft and is located in the bearing seat of the rotating bearing, which helps to bear the axial load and reduce the possibility of axial movement of the second rotating shaft. The elastic member extends parallel to the axial direction of the second rotating shaft, with one end of the elastic member abutting the first thrust bearing and the other end abutting the bearing seat, thereby providing axial force to the first thrust bearing and the second rotating shaft, ensuring the normal operation of the first thrust bearing, thereby reducing the axial movement of the second rotating shaft and improving the reliability of the overall structure. Through the above arrangement, the gearbox limiter of the present application can achieve axial limit of the first rotating shaft and the second rotating shaft, improve their connection stability, and achieve higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic structural diagram of a gearbox limiting device provided by an embodiment of the present utility model;
[0024] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.
[0025] In the picture:
[0026] 1. Housing; 2. First rotating shaft; 21. Threaded groove; 3. Second rotating shaft; 31. Connecting hole; 32. Rotating gear; 4. Rotating bearing; 41. Bearing seat; 411. First limiting groove; 5. First connecting member; 51. Threaded section; 6. Second connecting member; 7. First thrust bearing; 71. First seat ring; 72. Second seat ring; 8. Elastic member; 9. Limiting plate; 10. Second thrust bearing. DETAILED DESCRIPTION
[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0030] In the description of this embodiment, terms such as "upper," "lower," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0031] like Figure 1 and Figure 2 As shown, this embodiment provides a gearbox limiting device, which includes a housing 1, a first rotating shaft 2, a second rotating shaft 3, a rotating bearing 4, a first connecting member 5, a second connecting member 6, a first thrust bearing 7 and an elastic member 8. The first rotating shaft 2 and the second rotating shaft 3 are coaxially arranged, and the second rotating shaft 3 is rotatably connected to the housing 1 through the rotating bearing 4. A connecting hole 31 is axially penetrated in the second rotating shaft 3, and the first connecting member 5 is inserted into the connecting hole 31. One end of the first connecting member 5 is fixedly connected to the first rotating shaft 2, and the second connecting member 6 is connected to the other end of the first connecting member 5 and is configured to lock the first connecting member 5 and the second rotating shaft 3. The first thrust bearing 7 is arranged on the second rotating shaft 3 and is located in the bearing seat 41 of the rotating bearing 4. The elastic member 8 extends parallel to the axial direction of the second rotating shaft 3, and one end of the elastic member 8 abuts against the first thrust bearing 7, and the other end abuts against the bearing seat 41.
[0032] In this embodiment, the first rotating shaft 2 and the second rotating shaft 3 are arranged coaxially, and the second rotating shaft 3 is rotatably connected to the housing 1 through a rotating bearing 4, so that the first rotating shaft 2 and the second rotating shaft 3 can rotate around the same axis relative to the housing 1. Moreover, by providing a rotating bearing 4, the second rotating shaft 3 can be axially limited. A connecting hole 31 is axially penetrated in the second rotating shaft 3, and a first connecting member 5 is passed through the connecting hole 31. One end of the first connecting member 5 is fixedly connected to the first rotating shaft 2, and the second connecting member 6 is connected to the other end of the first connecting member 5, which can lock the first connecting member 5 and the second rotating shaft 3, so that the first rotating shaft 2 and the second rotating shaft 3 form an integral structure, thereby improving the connection stability between the two. The axial limitation of the integral structure is achieved by axially limiting the second rotating shaft 3. The first thrust bearing 7 is arranged on the second rotating shaft 3 and is located in the bearing seat 41 of the rotating bearing 4, which helps to bear the axial load and reduce the possibility of axial movement of the second rotating shaft 3. The elastic member 8 extends parallel to the axial direction of the second rotating shaft 3. With one end of the elastic member 8 abutting the first thrust bearing 7 and the other end abutting the bearing seat 41, the elastic member 8 provides an axial force to the first thrust bearing 7 and the second rotating shaft 3, ensuring the normal operation of the first thrust bearing 7, thereby reducing the axial movement of the second rotating shaft 3 and improving the reliability of the overall structure. Through the above arrangement, the gearbox limiting device of this embodiment can achieve axial limiting of the first rotating shaft 2 and the second rotating shaft 3, improve their connection stability, and enhance reliability.
[0033] The specific structure of the gear box limit device is described below:
[0034] Specifically, if Figure 1 As shown, the first rotating shaft 2 is provided with a thread groove 21, and the first connecting member 5 is provided with a threaded section 51 that is threadedly connected to the thread groove 21, ensuring a stable and reliable connection between the first rotating shaft 2 and the second rotating shaft 3. Moreover, the threaded connection is self-locking, which can prevent the first connecting member 5 from loosening or falling off when subjected to external forces.
[0035] More specifically, in this embodiment, the first connecting member 5 is a stud that passes through the connecting hole 31 and is threadedly connected to the thread groove 21, facilitating local material acquisition and assembly and disassembly. In other embodiments, the first connecting member 5 can be a bolt, that is, as long as it can achieve the above-mentioned functions, and the specific structure of the first connecting member 5 is not further limited herein.
[0036] Specifically, the connecting hole 31 is set through along the axial direction of the second rotating shaft 3, so that the first connecting member 5 can pass through one end of the second rotating shaft 3 and connect with the first rotating shaft 2, thereby simplifying the assembly process and making the operation more convenient and quick.
[0037] Specifically, if Figure 1 and Figure 2As shown, the gearbox limiting device further includes a limiting plate 9. The first connecting member 5 is passed through the limiting plate 9, and the limiting plate 9 is sandwiched between the second connecting member 6 and the second rotating shaft 3. The provision of the limiting plate 9 can effectively disperse the stress and load between the second connecting member 6 and the second rotating shaft 3, enhance the stability and reliability of the connection, and reduce loosening or damage to the connection caused by vibration or impact, thereby providing a locking and fixing effect for the connection between the second connecting member 6 and the second rotating shaft 3.
[0038] More specifically, in this embodiment, the second connecting member 6 includes a nut and a washer. The other end of the first connecting member 5 is inserted through the washer and threadedly connected to the nut. The washer is sandwiched between the nut and the second rotating shaft 3, effectively dissipating the pressure exerted by the nut on the second rotating shaft 3 and preventing the nut from loosening, thereby improving the connection strength between the nut and the second rotating shaft 3, thereby achieving mutual locking between the first connecting member 5 and the second rotating shaft 3. The first connecting member 5 is a stud, which is sequentially inserted through the washer and the connecting hole 31 and threadedly connected to the thread groove 21. The stud is tightened by the nut, causing the nut to abut against the washer, clamping the washer between the nut and the end surface of the second rotating shaft 3, thereby enhancing the stability and reliability of the connection between the stud, nut, washer, and the second rotating shaft 3. In other embodiments, the second connecting member 6 is a locking washer, and a bolt is inserted through the locking washer and the connecting hole 31 and connected to the thread groove 21 to achieve the above-mentioned functions. The specific structure of the second connecting member 6 is not further limited herein.
[0039] Specifically, if Figure 1 and Figure 2 As shown, the first race 71 of the first thrust bearing 7 abuts against the limit plate 9. Since the second connecting member 6 is connected to the first connecting member 5, the limit plate 9 is sandwiched between the second connecting member 6 and the second rotating shaft 3, so that the first rotating shaft 2, the second rotating shaft 3, the first connecting member 5, the second connecting member 6 and the limit plate 9 form an integral structure. One end of the elastic member 8 abuts against the first thrust bearing 7, and the other end abuts against the bearing seat 41, thereby providing axial force to the first thrust bearing 7 and the second rotating shaft 3, ensuring the normal operation of the first thrust bearing 7, thereby reducing the axial movement of the second rotating shaft 3 and improving the reliability of the overall structure. Moreover, through the above arrangement, the second rotating shaft 3 is connected to the first race 71 through the limit plate 9, thereby ensuring the normal rotation operation of the first rotating shaft 2 and the second rotating shaft 3. Among them, the elastic member 8 is a spring or an elastic rubber pad. As long as it can achieve the above-mentioned functions, the specific structure of the elastic member 8 is not further limited here.
[0040] Specifically, if Figure 2As shown, a first limiting groove 411 is provided on the bearing seat 41, and the open end of the first limiting groove 411 is set toward the first thrust bearing 7. Part of the elastic member 8 is located in the first limiting groove 411 and abuts against the bottom of the first limiting groove 411. Since the position of the bearing seat 41 relative to the housing 1 is fixed, when the first thrust bearing 7 is subjected to an axial load, the first thrust bearing 7 is kept in a fixed position in the axial direction of the first rotating shaft 2 through the supporting effect of the elastic member 8, which helps to reduce its axial movement and improve the stability and reliability of the entire gear box limiting device.
[0041] More specifically, multiple first limiting grooves 411 are provided, spaced apart along the circumference of the bearing seat 41. This provides multi-point support and limiting for the first thrust bearing 7, effectively reducing axial movement of the first thrust bearing 7 and enhancing the stability and reliability of the entire gearbox limiting device. Furthermore, multiple elastic members 8 are provided, corresponding one-to-one with the multiple first limiting grooves 411. This arrangement helps reduce local stress concentration in the first thrust bearing 7 and prolong its service life.
[0042] More specifically, the end of the first thrust bearing 7 facing the elastic member 8 is the second seat ring 72, one end of the elastic member 8 abuts against the second seat ring 72, and the other end abuts against the bottom of the first limiting groove 411, which effectively enhances the connection stability between the first thrust bearing 7 and the bearing seat 41, limits the axial movement of the first thrust bearing 7, and thus improves the stability of the entire device.
[0043] Specifically, if Figure 1 As shown, the gearbox limiting device also includes a second thrust bearing 10. A rotating gear 32 is provided on the second rotating shaft 3. The second thrust bearing 10 is disposed between the rotating bearing 4 and the rotating gear 32. The second thrust bearing 10 cooperates with the first thrust bearing 7 to ensure the axial stability and reliability of the first rotating shaft 2 and the second rotating shaft 3. Furthermore, the bearing seat 41 abuts the second thrust bearing 10, and the elastic member 8 is provided to provide axial support to the second thrust bearing 10, ensuring its normal operation.
[0044] Specifically, the first rotating shaft 2 and the second rotating shaft 3 are splined to each other, which can improve the connection stability between the first rotating shaft 2 and the second rotating shaft 3 and ensure the stability of the two during rotation, so as to facilitate the transmission of torque.
[0045] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. Gearbox limiting device, characterized in that, include: Box (1); A first rotating shaft (2) and a second rotating shaft (3) are coaxially arranged, wherein the second rotating shaft (3) is rotatably connected to the housing (1) via a rotating bearing (4), and a connecting hole (31) is axially penetrated in the second rotating shaft (3); A first connecting member (5) is inserted into the connecting hole (31), and one end of the first connecting member (5) is fixedly connected to the first rotating shaft (2); a second connecting member (6), connected to the other end of the first connecting member (5), and configured to lock the first connecting member (5) and the second rotating shaft (3); a first thrust bearing (7) disposed on the second rotating shaft (3) and located in a bearing seat (41) of the rotating bearing (4); The elastic member (8) extends parallel to the axial direction of the second rotating shaft (3), one end of the elastic member (8) abuts against the first thrust bearing (7), and the other end abuts against the bearing seat (41).
2. The gearbox limiting device according to claim 1, characterized in that: The first rotating shaft (2) is provided with a thread groove (21), and the first connecting member (5) is provided with a thread section (51) threadedly connected to the thread groove (21).
3. The gear box limiting device according to claim 1, characterized in that: The second connecting member (6) comprises a nut and a washer, the other end of the first connecting member (5) is passed through the washer and is threadedly connected to the nut, and the washer is clamped between the nut and the second rotating shaft (3).
4. The gear box limiting device according to claim 1, characterized in that: The gearbox limiting device further comprises a limiting plate (9), the first connecting member (5) is passed through the limiting plate (9), and the limiting plate (9) is clamped between the second connecting member (6) and the second rotating shaft (3).
5. The gear box limiting device according to claim 4, characterized in that: The first race (71) of the first thrust bearing (7) abuts against the limiting plate (9).
6. The gear box limiting device according to claim 1, characterized in that: A first limiting groove (411) is provided on the bearing seat (41), an open end of the first limiting groove (411) is arranged toward the first thrust bearing (7), and a portion of the elastic member (8) is located in the first limiting groove (411) and abuts against the bottom of the first limiting groove (411).
7. The gear box limiting device according to claim 6, characterized in that: There are a plurality of the first limiting grooves (411), and the plurality of the first limiting grooves (411) are arranged at intervals along the circumference of the bearing seat (41); there are a plurality of the elastic members (8), and the plurality of the elastic members (8) are arranged in a one-to-one correspondence with the plurality of the first limiting grooves (411).
8. The gear box limiting device according to claim 1, characterized in that: The gearbox limiting device further comprises a second thrust bearing (10), a rotating gear (32) is provided on the second rotating shaft (3), and the second thrust bearing (10) is arranged between the rotating bearing (4) and the rotating gear (32).
9. The gear box limiting device according to claim 8, characterized in that: The bearing seat (41) abuts against the second thrust bearing (10).
10. The gear box limiting device according to any one of claims 1 to 9, characterized in that: The first rotating shaft (2) and the second rotating shaft (3) are spline-connected.