Worm direct drive device

Abstract

The utility model provides a worm direct drive device which comprises a box body and a worm rotationally arranged in the box body, an access hole is formed in the upper portion of the box body, a driving assembly used for driving the worm to rotate is arranged at one end of the box body, and a bearing seat rotationally matched with the worm is arranged in the middle of the box body. One end of the worm is rotationally installed on the bearing seat through a first tapered roller bearing, the other end of the worm is rotationally installed on the box body through a second tapered roller bearing, and the large-diameter end of the first tapered roller bearing is arranged towards the driving assembly. A positioning assembly used for positioning the first tapered roller bearing is arranged at the end, penetrating through the bearing seat, of the worm. The small-diameter end of the second tapered roller bearing is arranged towards the driving assembly, and the end, extending out of the box body, of the worm is provided with a limiting assembly used for positioning the second tapered roller bearing. The worm direct drive device has the advantages of being simple in structure, reasonable in design, high in stability and easy to assemble and maintain.

Description

Technical Field

[0001] This utility model belongs to the field of worm gear drive equipment, and in particular relates to a worm gear direct drive device. Background Technology

[0002] In modern industrial production, there are extremely high requirements for the precision, efficiency, and stability of power transmission. While traditional worm gear drives offer advantages such as large transmission ratios and compact structures, they suffer from rapid wear, limited transmission efficiency, and a tendency to creep under high loads, making them unsuitable for the demands of some high-precision, high-reliability equipment. Furthermore, the housing structure of traditional worm gear drives makes maintenance of the worm difficult, and the bearing seats on the housing provide inadequate support for the worm, potentially leading to worm shaft bending and deformation, thus affecting transmission accuracy. Utility Model Content

[0003] In view of this, the present invention aims to propose a worm gear direct drive device to solve the problem that the housing structure of the existing worm gear drive mechanism has defects, which leads to inconvenience in maintenance and affects the transmission accuracy.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A worm gear direct drive device includes a housing and a worm gear rotatably disposed within the housing. The housing has an access port at its top, a drive assembly for driving the worm gear at one end, and a bearing housing in the middle of the housing that rotatably engages with the worm gear. One end of the worm gear is rotatably mounted on the bearing housing via a first tapered roller bearing, and the other end is rotatably mounted on the housing via a second tapered roller bearing. The larger diameter end of the first tapered roller bearing faces the drive assembly. A positioning assembly for positioning the first tapered roller bearing is provided at the end of the worm gear passing through the bearing housing; the smaller diameter end of the second tapered roller bearing faces the drive assembly, and a limiting assembly for positioning the second tapered roller bearing is provided at the end of the worm gear extending out of the housing.

[0006] Furthermore, the worm gear is connected to the output end of the drive assembly via a coupling.

[0007] Furthermore, the drive assembly includes a variable frequency motor and a speed reducer, and the worm gear is connected to the output end of the variable frequency motor through the speed reducer.

[0008] Furthermore, the bearing housing is provided with a first countersunk hole that mates with the first tapered roller bearing, and the positioning assembly includes a positioning element, which is provided with a threaded hole, and the worm is provided with an external thread that mates with the threaded hole.

[0009] Furthermore, the positioning component is provided with a positioning groove that facilitates screwing. Multiple positioning grooves are evenly arranged along the circumference of the positioning component, and each positioning groove is located at the center of the positioning component.

[0010] Furthermore, the positioning component is provided with a fan-shaped deformation hole at the position corresponding to the positioning groove. The deformation hole is coaxially arranged with the threaded hole and the threaded hole is connected.

[0011] Furthermore, the housing is provided with a second countersunk hole that mates with the second tapered roller bearing, and the limiting assembly includes a limiting member, which is threadedly connected to the worm gear.

[0012] Furthermore, a limiting post is provided below the bearing seat, and at least two limiting posts are provided at intervals. The housing is provided with limiting holes that cooperate with the limiting posts.

[0013] Furthermore, the housing is provided with limiting grooves that mate with the bearing seats on both the left and right sides corresponding to the bearing seats.

[0014] Compared with the prior art, the worm gear direct drive device of this utility model has the following advantages:

[0015] The worm gear direct drive device described in this utility model has the advantages of simple structure, reasonable design, high stability, and easy assembly and maintenance. By using a first tapered roller bearing and a second tapered roller bearing to install the worm gear, and by aligning the small-diameter ends of the first and second tapered roller bearings, not only is the stability of the worm gear rotation improved, but the assembly and maintenance of the worm gear are also facilitated. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a worm gear direct drive device according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the positioning component in a worm gear direct drive device according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the bearing housing in a worm gear direct drive device according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the housing structure in a worm gear direct drive device according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Housing; 2. Variable frequency motor; 3. Reducer; 4. Coupling; 5. Worm gear; 6. Bearing housing; 7. First tapered roller bearing; 8. Second tapered roller bearing; 9. Limiting assembly; 10. Positioning assembly; 11. Positioning element; 12. Threaded hole; 13. Positioning groove; 14. Deformation hole; 15. First countersunk hole; 16. Limiting post; 17. Limiting groove; 18. Limiting hole; 19. Second countersunk hole. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] A worm gear direct drive device, such as Figures 1 to 4As shown, the device includes a housing 1 and a worm gear 5 rotatably mounted inside the housing 1. The housing 1 has an inspection port on its top. One end of the housing 1 has a drive assembly for driving the worm gear 5 to rotate. The middle of the housing 1 has a bearing seat 6 that rotatably engages with the worm gear 5. One end of the worm gear 5 is rotatably mounted on the bearing seat 6 via a first tapered roller bearing 7, and the other end is rotatably mounted on the housing 1 via a second tapered roller bearing 8. The large-diameter end of the first tapered roller bearing 7 faces the drive assembly. A positioning assembly 10 for positioning the first tapered roller bearing 7 is provided at the end of the worm gear 5 that passes through the bearing seat 6. The small-diameter end of the second tapered roller bearing 8 faces the drive assembly. A limiting assembly 9 for positioning the second tapered roller bearing 8 is provided at the end of the worm gear 5 that extends out of the housing 1.

[0028] Specifically, the adoption of an open-frame structure for the housing 1 is one of the key innovations of this utility model. By setting an inspection port on the top of the housing 1, operators can easily observe the supply status of lubricating oil based on the real-time working status of the turbine and worm gear 5.

[0029] In practical applications, by using the first tapered roller bearing 7 and the second tapered roller bearing 8 to install the worm 5, and by setting the small diameter ends of the first tapered roller bearing 7 and the second tapered roller bearing 8 to correspond, it is not only beneficial to improve the rotational stability of the worm 5, but also convenient to assemble and maintain the worm 5.

[0030] Preferably, the worm gear 5 is connected to the output end of the drive assembly via a coupling 4. The drive assembly includes a variable frequency motor 2 and a reducer 3, with the worm gear 5 connected to the output end of the variable frequency motor 2 via the reducer 3. Exemplarily, the fixed end of the reducer can be mounted on the housing 1 using conventional methods such as screws, and the reducer 3 is connected to the variable frequency motor 2 using conventional methods. The output end of the reducer 3 is connected to the worm gear 5 via a coupling 4. By employing a variable frequency motor 2 that can be controlled by a PLC, this device can utilize PLC control to set automatic protection functions under high load conditions to protect against overload and improve transmission safety performance.

[0031] Preferably, the bearing housing 6 has a first countersunk hole 15 that mates with the first tapered roller bearing 7. The positioning assembly 10 includes a positioning element 11, which has a threaded hole 12. The worm gear 5 has an external thread that mates with the threaded hole 12. Exemplarily, the positioning element 11 has a positioning groove 13 for easy screwing. Multiple positioning grooves 13 are evenly distributed around the circumference of the positioning element 11, and each positioning groove 13 corresponds to the center of the positioning element 11. In actual use, by providing multiple positioning grooves 13 on the positioning element 11, it is convenient for operators to screw and assemble the positioning element 11. At the same time, by positioning the positioning grooves 13 to the center of the positioning element 11, it is beneficial to ensure the overall structural strength of the positioning element 11.

[0032] In practical applications, the positioning component 11 is also provided with a fan-shaped deformation hole 14 at the position corresponding to the positioning groove 13. The deformation hole 14 is coaxially arranged with the threaded hole 12 and is connected to the threaded hole 12. Specifically, the fan-shaped deformation hole 14 can be semi-circular, and when multiple positioning grooves 13 are provided, the positioning groove 13 located at the deformation hole 14 can also be connected to the deformation hole 14. By providing the deformation hole 14, the positioning component 11 can generate elastic deformation, which helps to ensure that the positioning component 11 can continuously and stably lock and fix the first tapered roller bearing 7, thereby further improving the stability and reliability of the worm gear 5 rotation.

[0033] Preferably, the housing 1 has a second countersunk hole 19 that mates with the second tapered roller bearing 8, and the limiting assembly 9 includes a limiting member, which is threadedly connected to the worm gear 5. For example, the limiting member can be a limiting nut, and the worm gear also has external threads that mate with the limiting nut. Using a threaded connection also helps to reduce the difficulty of assembling, disassembling, and maintaining the worm gear 5.

[0034] In practical applications, to facilitate the assembly of the worm gear 5, the diameter of the first countersunk hole 15 is larger than the outer diameter of the worm gear 5. The operator can first pass the worm gear 5 through the bearing housing 6, allowing the end of the worm gear 5 to extend out of the housing 1. Then, the first tapered roller bearing 7 and the second tapered roller bearing 8 are installed, along with the corresponding positioning and limiting components 11. Finally, the worm gear 5 is connected to the output end of the drive assembly using the coupling 4.

[0035] Preferably, a limiting post 16 is provided below the bearing housing 6, and at least two limiting posts 16 are provided at intervals. The housing 1 is provided with limiting holes 18 that cooperate with the limiting posts 16. For example, two limiting posts 16 are provided at intervals, and each limiting post 16 is fixed on the bearing housing 6. Correspondingly, two limiting holes 18 are also provided. By using multiple limiting posts 16 cooperating with limiting holes 18, it is beneficial to improve the stability of the bearing housing 6 on the housing 1, thereby improving the structural strength at the connection between the bearing housing 6 and the housing 1, and reducing the impact of bearing housing 6 offset or deformation on the stability of the worm gear 5.

[0036] In practical applications, a fixing nut can be installed on one end of the limiting post 16 that passes through the limiting hole 18. The fixing nut is used to fix the bearing seat 6 on the housing 1, which not only further improves the stability of the bearing seat 6 on the housing 1, but also facilitates the replacement and maintenance of the bearing seat 6. In addition, the bearing seat 6 can also be further welded and fixed to the housing 1. In this case, the limiting post 16 can still distribute the deformation force of the bearing seat 6.

[0037] Preferably, the housing 1 is provided with limiting grooves 17 on both the left and right sides corresponding to the bearing seat 6, which cooperate with the bearing seat 6. By setting the limiting grooves 17, and utilizing the cooperation between the limiting grooves 17 and the bearing seat 6, combined with the cooperation between the limiting post 16 and the limiting hole 18, the stability of the connection between the bearing seat 6 and the housing 1 can be further improved, and the possibility of deformation of the bearing seat 6 can be reduced.

[0038] The worm gear direct drive device described in this utility model has the advantages of simple structure, reasonable design, high stability, and easy assembly and maintenance. By using a first tapered roller bearing and a second tapered roller bearing to install the worm gear, and by aligning the small-diameter ends of the first and second tapered roller bearings, not only is the stability of the worm gear rotation improved, but the assembly and maintenance of the worm gear are also facilitated.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A worm gear direct drive device, characterized in that: The device includes a housing (1) and a worm gear (5) rotatably mounted inside the housing (1). The housing (1) has an inspection port on its top. One end of the housing (1) is provided with a drive assembly for driving the worm gear (5) to rotate. The middle part of the housing (1) is provided with a bearing seat (6) that rotatably engages with the worm gear (5). One end of the worm gear (5) is rotatably mounted on the bearing seat (6) via a first tapered roller bearing (7), and the other end is rotatably mounted on the housing (1) via a second tapered roller bearing (8). The large-diameter end of the first tapered roller bearing (7) faces the drive assembly. One end of the worm gear (5) passing through the bearing seat (6) is provided with a positioning assembly (10) for positioning the first tapered roller bearing (7). The small-diameter end of the second tapered roller bearing (8) faces the drive assembly. One end of the worm gear (5) extending out of the housing (1) is provided with a limiting assembly (9) for positioning the second tapered roller bearing (8).

2. The worm gear direct drive device according to claim 1, characterized in that: The worm gear (5) is connected to the output end of the drive assembly via a coupling (4).

3. A worm gear direct drive device according to claim 1 or 2, characterized in that: The drive assembly includes a variable frequency motor (2) and a reducer (3), and the worm gear (5) is connected to the output end of the variable frequency motor (2) through the reducer (3).

4. A worm gear direct drive device according to claim 1, characterized in that: The bearing housing (6) is provided with a first countersunk hole (15) that mates with the first tapered roller bearing (7). The positioning assembly (10) includes a positioning element (11), which is provided with a threaded hole (12). The worm (5) is provided with an external thread that mates with the threaded hole (12).

5. A worm gear direct drive device according to claim 4, characterized in that: The positioning component (11) is provided with a positioning groove (13) that is easy to screw. Multiple positioning grooves (13) are evenly arranged along the circumference of the positioning component (11), and each positioning groove (13) is provided in the middle of the positioning component (11).

6. A worm gear direct drive device according to claim 5, characterized in that: The positioning component (11) is also provided with a fan-shaped deformation hole (14) at the position corresponding to the positioning groove (13). The deformation hole (14) is coaxially arranged with the threaded hole (12) and the deformation hole (14) is connected to the threaded hole (12).

7. A worm gear direct drive device according to claim 1, characterized in that: The housing (1) is provided with a second countersunk hole (19) that mates with the second tapered roller bearing (8). The limiting assembly (9) includes a limiting member, and the limiting member and the worm (5) are connected by a thread.

8. A worm gear direct drive device according to claim 1, characterized in that: The bearing seat (6) is provided with a limiting post (16) below it. At least two limiting posts (16) are provided at intervals. The housing (1) is provided with a limiting hole (18) that cooperates with the limiting post (16).

9. A worm gear direct drive device according to claim 8, characterized in that: The housing (1) is provided with limiting grooves (17) on both the left and right sides corresponding to the bearing seat (6) to cooperate with the bearing seat (6).

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