Dual drive slewing drive bearing

Abstract

The utility model relates to a kind of double-drive rotary drive bearing, including annular shell, inner tube, worm gear ring, worm, plugging mechanism, sealing ring and sealing limiting assembly;Worm gear ring is installed between annular shell and inner tube, worm is installed through horizontal cylinder and is engaged with worm gear ring, realizes rotary drive;Horizontal cylinder is equipped with oil injection hole, oil injection hole is blocked by sliding sealing sliding plate, sealing sliding plate and threaded rod, moving block, connecting rod linkage realize synchronous opening and closing;Sealing ring blocks gap, cooperates swing plate, peg, stop lever and nut and forms limiting compression structure.The structure solves the technical problems of insufficient torque of existing single drive, inconvenient oil injection and sealing installation, improves transmission stability, maintenance convenience and sealing reliability.

Description

Technical Field

[0001] This utility model belongs to the field of rotary drive technology, specifically relating to dual-drive rotary drive bearings. Background Technology

[0002] Slewing drive bearings are widely used in applications where structural components of equipment rotate around a fixed axis, typically through the meshing transmission between a worm gear and a worm wheel. However, in existing technologies, single-drive structures suffer from low transmission efficiency and limited load capacity. Especially under high torque transmission requirements, they are prone to uneven stress distribution or structural instability, affecting the smoothness and reliability of equipment operation. Therefore, dual-drive slewing bearings have gradually emerged in the market to improve torque output capacity and achieve more reliable load transfer.

[0003] On the other hand, worm gear meshing structures rely on lubricating grease for extended periods to ensure transmission efficiency and reduce wear. However, common lubrication methods often employ bolt-sealed structures, which are prone to bolt loosening or loss during maintenance. This not only affects the sealing of the lubrication holes but can also lead to lubricating grease leakage or foreign object intrusion. Furthermore, for dual-lubrication hole structures, traditional sealing methods struggle to achieve synchronous control, reducing operational convenience.

[0004] During the installation of worm gear swivel rings, to ensure ease of assembly, the inner diameter of the annular housing is often designed to be larger than the outer diameter of the worm gear swivel ring. This creates radial gaps that can easily allow dust to enter or lubricating grease to leak. Therefore, sealing structures such as sealing rings and retaining rods are typically used to seal these gaps. However, in existing technologies, sealing rings often rely on their own elasticity for assembly, which, limited by installation strength and sealing effectiveness, can easily lead to problems such as incomplete sealing or loosening, especially under high-load conditions. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a dual-drive rotary drive bearing, which can achieve a more stable structure, more convenient oil injection, and more reliable sealing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-drive rotary drive bearing, comprising a housing, the housing comprising an annular shell, an inner cylinder disposed inside the annular shell, a worm gear ring rotatably mounted between the annular shell and the inner cylinder, a horizontal cylinder disposed on one side of the annular shell, end caps being bolted to both ends of the horizontal cylinder, a worm being rotatably mounted inside the horizontal cylinder, the worm meshing with the worm gear ring;

[0007] The surface of the cross cylinder is provided with a track rib, and the track rib is symmetrically provided with oil injection holes. A sealing mechanism is installed on the surface of the track rib, and the sealing mechanism is used to seal the oil injection holes.

[0008] A sealing ring is provided above the worm gear rotating ring and the inner wall of the annular housing.

[0009] Furthermore, a large bearing is installed between the worm gear ring and the outer surface of the inner cylinder, and small bearings are symmetrically installed at both ends inside the cross cylinder.

[0010] Furthermore, the sealing mechanism includes a sealing slide plate that slides symmetrically on the surface of the track rib and a threaded rod that rotates at the center of the track rib. The sealing slide plate covers the oil injection hole to seal it.

[0011] Furthermore, a movable block is screwed onto the surface of the threaded rod, and connecting rods are symmetrically hinged on both sides of the movable block. The ends of the two connecting rods opposite to the movable block are respectively hinged to two sealing slide plates.

[0012] Furthermore, a stop bar is horizontally slidably installed on both sides of the annular shell, and the stop bar is positioned above the sealing ring;

[0013] The sealing ring is used to seal the gap between the worm gear ring and the inner wall of the annular housing. The stop bar passes through the outer surface of the annular housing, and the two stop bars have notched grooves at their opposite ends.

[0014] Furthermore, the annular shell surface is symmetrically provided with bosses, and the annular shell surface is symmetrically provided with fixing studs. The fixing studs and bosses are both located below the stop bar. A swing plate is rotatably mounted on the surface of the boss, and a bolt is provided on the top of the swing plate. The bolt passes through the notch.

[0015] Furthermore, a through groove is provided on the surface of the swing plate, the fixing stud passes through the through groove, and a nut is screwed into the end of the through groove, the nut limiting the outer side of the swing plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The dual-drive structure design effectively improves the driving torque output capability by setting a worm gear inside the cross cylinder and meshing with the worm wheel ring, thereby enhancing the stability and reliability of the overall transmission. It overcomes the problems of insufficient torque, weak load capacity and uneven transmission that exist in existing single-drive rotary devices, and is suitable for application scenarios with heavy load or large rotation requirements.

[0018] The sealing mechanism, through the setting of two synchronously controllable sealing slide plates, and in conjunction with the centrally located threaded rod, moving block and linkage structure, realizes the synchronous opening and closing control of the oil injection holes on both sides, replacing the traditional method of relying on bolt sealing. This solves the problems of easy loss of bolts, inconvenient operation and poor sealing during the oil injection process, and improves the convenience and reliability of lubrication maintenance.

[0019] In terms of sealing structure, a sealing ring is used to seal the gap between the worm gear ring and the annular housing, and a clamping mechanism composed of a stop bar, a swing plate and a bolt body is used to limit and fix the sealing ring. This overcomes the problem of poor sealing caused by the traditional method of relying solely on the elastic installation of the sealing component, enhances the sealing stability of the structure, prevents dust from entering and grease from leaking, and effectively extends the service life of the device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the outer shell structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the transverse top section structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the stop bar installation structure of this utility model.

[0025] The components represented by each number in the attached diagram are listed below: 1. Outer shell; 11. Annular shell; 12. Horizontal cylinder; 121. End cap; 122. Track protrusion; 123. Oil injection hole; 13. Inner cylinder; 14. Boss; 16. Fixing stud; 2. Worm gear ring; 3. Worm; 4. Sealing mechanism; 41. Sealing slide plate; 42. Threaded rod; 43. Moving block; 44. Connecting rod; 5. Sealing ring; 6. Stop bar; 61. Notch groove; 7. Swing plate; 71. Bolt body; 72. Through groove; 8. Nut. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] refer to Figures 1-5As shown, the dual-drive rotary drive bearing includes a housing 1, which comprises an annular shell 11. The annular shell 11 is an integrally formed steel structure with a hollow inner cylinder 13 inside. The inner cylinder 13 extends through the annular shell 11 along its axial direction. The annular shell 11 and the inner cylinder 13 are rotatably mounted via a large bearing 31. The outer ring of the large bearing 31 is fixedly connected to the inner wall of the annular shell 11, and the inner ring of the large bearing 31 is fixedly connected to the outer surface of the worm gear ring 2. The worm gear ring 2 and the inner cylinder 13 are connected by a rolling contact. The relative rotation is achieved by the contact, and the outer peripheral tooth surface of the worm wheel ring 2 meshes with the helical tooth surface of the worm 3 to achieve the transmission function; a horizontal cylinder 12 is provided on one side of the annular shell 11. The horizontal cylinder 12 is a cylindrical structure and is arranged horizontally. Both ends of the horizontal cylinder 12 are bolted with end caps 121. The end caps 121 are threadedly connected to the horizontal cylinder 12 for sealing and easy disassembly and maintenance; small bearings 32 are symmetrically arranged inside the horizontal cylinder 12. The worm 3 is rotated and supported by the small bearings 32. The axis of the worm 3 is perpendicular to the axis of the worm wheel ring 2 to form a worm drive transmission system.

[0028] The surface of the horizontal cylinder 12 is provided with a track rib 122, which extends symmetrically along the length of the horizontal cylinder 12 to form a slide rail structure. Two oil injection holes 123 are symmetrically opened on the surface of the track rib 122. The oil injection holes 123 penetrate into the interior of the horizontal cylinder 12 and are connected to the cavity where the small bearing 32 is located, for the purpose of replacing or replenishing lubricating grease. A sealing mechanism 4 is installed on the surface of the track rib 122. The sealing mechanism 4 is used to synchronously control and seal the oil injection holes 123 to prevent lubricating grease from leaking out or foreign objects from entering, thereby improving the stability of equipment operation and the convenience of maintenance.

[0029] A sealing ring 5 is provided on the upper part of the inner wall of the worm gear ring 2 and the annular housing 11. The sealing ring 5 is an elastic composite seal. The sealing ring 5 is installed on the upper surface of the worm gear ring 2 and is used to seal the annular gap formed between the worm gear ring 2 and the annular housing 11 to prevent lubricating grease from leaking and external dust from entering, and to keep the transmission area clean.

[0030] refer to Figure 3 As shown, a large bearing 31 is installed between the worm gear ring 2 and the outer surface of the inner cylinder 13. The large bearing 31 is a double-row deep groove ball bearing, with the outer ring fixedly installed on the inner wall of the annular housing 11 and the inner ring installed on the outer side of the worm gear ring 2. Small bearings 32 are symmetrically installed at both ends inside the cross cylinder 12. The small bearings 32 are angular contact ball bearings, which are used to support the rotation of the worm 3 and improve its rotation accuracy and transmission stability.

[0031] refer to Figure 2 and Figure 3As shown, the sealing mechanism 4 includes a sealing slide plate 41 that slides symmetrically on the surface of the track protrusion 122 and a threaded rod 42 that is rotatably installed at the center of the track protrusion 122. The axis of the threaded rod 42 is parallel to the worm gear 3. The sealing slide plate 41 is a flat plate structure and can slide along the length direction in the groove of the track protrusion 122. The sealing slide plate 41 covers the oil injection hole 123 to seal it. When the sealing slide plate 41 is misaligned with the oil injection hole 123, the oil injection hole 123 is in the open state, and the lubricating grease can be replenished.

[0032] refer to Figure 2 As shown, a movable block 43 is screwed onto the surface of the threaded rod 42. The movable block 43 is a sliding block with a threaded hole in the middle, and the threaded hole is screwed onto the threaded rod 42. Connecting rods 44 are symmetrically hinged on both sides of the movable block 43. The two connecting rods 44 are slender connecting rods, and the ends away from the movable block 43 are respectively hinged to the inner sides of the two sealing slide plates 41. When the threaded rod 42 is rotated, the movable block 43 moves along the thread direction, and the connecting rods 44 drive the sealing slide plates 41 to slide synchronously, thereby realizing the synchronous opening or blocking control of the two oil injection holes 123.

[0033] refer to Figure 1 and Figure 5 As shown, two horizontally sliding stop bars 6 are installed on the upper sides of the annular housing 11. The stop bars 6 are horizontally inserted through the surface of the annular housing 11 and located above the sealing ring 5. The sealing ring 5 is used to seal the annular gap between the worm gear ring 2 and the inner wall of the annular housing 11. The stop bars 6 are used to limit and press the sealing ring 5, thereby improving the sealing effect. The stop bars 6 penetrate the outer surface of the annular housing 11. The two stop bars 6 are provided with notches 61 at their opposite ends. The notches 61 are semi-circular grooves used to cooperate with the bolt body 71 to achieve the limiting and pushing function.

[0034] refer to Figure 5 As shown, the annular housing 11 has symmetrically arranged bosses 14 on its surface. The bosses 14 are rectangular protrusions and are located below the stop bar 6. The annular housing 11 has symmetrically arranged fixing studs 16 on its surface. The fixing studs 16 are through-hole studs used to limit the installation of the swing plate 7. The swing plate 7 is rotatably mounted on the surface of the bosses 14. The swing plate 7 is a plate structure that can swing around the fixing studs 16. The top of the swing plate 7 is provided with a bolt 71. The bolt 71 is a cylindrical limiting post that passes through the notch 61 and is used to push the stop bar 6 inward during swinging to achieve limiting and pressing of the sealing ring 5.

[0035] refer to Figure 5As shown, a through groove 72 is provided on the surface of the swing plate 7. The through groove 72 is an elongated through hole that extends along the length of the swing plate 7. The fixing stud 16 passes through the through groove 72 and is screwed into the nut 8 through the external thread. The nut 8 is a hexagonal nut. The nut 8 is screwed into the end position of the through groove 72 to limit the outer side of the swing plate 7. Thus, the angle of the swing plate 7 can be adjusted by rotating the nut 8. Furthermore, the position of the stop bar 6 is controlled by the bolt body 71, and finally the sealing ring 5 is limited and the sealing is enhanced.

[0036] The working principle of this utility model is as follows: the worm 3 is rotated by a motor or rocker arm. At this time, the worm 3 can mesh with the worm wheel ring 2, driving the worm wheel ring 2 to rotate around the axis of the inner cylinder 13, realizing the vertical rotation drive. During use, the lubricating grease needs to be replaced regularly through the oil injection hole 123. Rotating the threaded rod 42 can control the position of the moving block 43, and then control the movement of the sealing slide plates 41 on both sides through the connecting rod 44 to control whether they cover the oil injection hole 123. When covered, the oil injection hole 123 can be blocked to prevent leakage. Conversely, when the sealing slide plate 41 is misaligned with the oil injection hole 123, oil can be injected. Compared with the existing bolt sealing method, this structure can prevent the bolt from being lost when replacing the lubricating grease, and maintain simultaneous control of the two oil injection holes 123, improving convenience.

[0037] To facilitate the installation of the worm gear ring 2, the inner diameter of the annular housing 11 must be larger than the outer diameter of the worm gear ring 2. Therefore, after installation, the gap needs to be sealed by the stop rod 6 to prevent dust from entering and to prevent internal grease from leaking. However, the sealing ring 5 is relatively large, and the installation strength is limited by simply relying on the elastic deformation of the sealing ring 5. Therefore, the outer nut 8 can be rotated to squeeze the swing plate 7, causing the top of the swing plate 7 to swing inward. Then, the stop rod 6 is pushed inward by the cooperation of the bolt body 71 and the notch groove 61, so that the stop rod 6 limits the upper surface of the sealing ring 5, thereby improving the sealing performance of the sealing ring 5 after installation.

[0038] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A dual-drive rotary drive bearing, comprising a housing (1), characterized in that: The outer shell (1) includes an annular shell (11), an inner cylinder (13) is provided inside the annular shell (11), a worm gear ring (2) is rotatably installed between the annular shell (11) and the inner cylinder (13), a horizontal cylinder (12) is provided on one side of the annular shell (11), and end caps (121) are installed at both ends of the horizontal cylinder (12) by bolts. A worm (3) is rotatably installed inside the horizontal cylinder (12), and the worm (3) meshes with the worm gear ring (2). The surface of the cross cylinder (12) is provided with a track protrusion (122), and the surface of the track protrusion (122) is symmetrically provided with oil injection holes (123). A sealing mechanism (4) is installed on the surface of the track protrusion (122), and the sealing mechanism (4) is used to seal the oil injection holes (123). A sealing ring (5) is provided above the inner wall of the worm gear ring (2) and the annular housing (11).

2. The dual-drive rotary drive bearing according to claim 1, characterized in that: A large bearing is installed between the worm gear ring (2) and the outer surface of the inner cylinder (13), and small bearings are symmetrically installed at both ends inside the cross cylinder (12).

3. The dual-drive rotary drive bearing according to claim 1, characterized in that: The sealing mechanism (4) includes a sealing slide plate (41) that slides symmetrically on the surface of the track protrusion (122) and a threaded rod (42) that rotates at the center of the track protrusion (122). The sealing slide plate (41) covers the oil injection hole (123) by sliding to seal it.

4. The dual-drive rotary drive bearing according to claim 3, characterized in that: The threaded rod (42) has a movable block (43) screwed onto its surface. Connecting rods (44) are symmetrically hinged on both sides of the movable block (43). The ends of the two connecting rods (44) away from the movable block (43) are respectively hinged to two sealing slide plates (41).

5. The dual-drive rotary drive bearing according to claim 1, characterized in that: Both sides of the annular housing (11) are horizontally slidably equipped with stop bars (6), which are positioned above the sealing ring (5). The sealing ring (5) is used to seal the gap between the worm gear ring (2) and the inner wall of the annular housing (11). The stop bar (6) penetrates the outer surface of the annular housing (11). The two stop bars (6) are provided with notch grooves (61) at their opposite ends.

6. The dual-drive rotary drive bearing according to claim 5, characterized in that: The annular housing (11) has symmetrical bosses (14) on its surface and fixed studs (16) on its surface. The fixed studs (16) and bosses (14) are both located below the stop bar (6). A swing plate (7) is rotatably mounted on the surface of the bosses (14). A bolt (71) is provided on the top of the swing plate (7). The bolt (71) passes through the notch (61).

7. The dual-drive rotary drive bearing according to claim 6, characterized in that: The swing plate (7) has a through groove (72) on its surface. The fixing stud (16) passes through the through groove (72). A nut (8) is screwed into the end of the through groove (72). The nut (8) limits the outer side of the swing plate (7).

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