Pulley block bearing sealing structure

Abstract

The utility model provides a pulley block bearing sealing structure, which relates to the technical field of bearing sealing, and comprises a loading shaft lever, and a pulley bearing is fixedly arranged in the middle of the outer wall of the circumference of the loading shaft lever through an inner ring; a sealing main shell is fixedly mounted on the outer ring of the pulley bearing; sealing plugs are inserted into the left end and the right end of the sealing main shell. The sealing plug is further installed on the loading shaft rod in a sleeving and sliding mode. According to the sealing structure, the function of conveniently positioning and canceling the two limiting baffle rings by rotating the rotating shaft body is achieved, so that the two limiting baffle rings can be synchronously fixed or released, compared with a step-by-step fixing and loosening mode in a comparison file, the dismounting and mounting process of the sealing structure is more simplified, and the sealing structure is more convenient to mount and dismount. The problems that when a worker installs or disassembles an abutting block, two bolts need to be independently operated one by one, the complexity of the disassembly and assembly steps of the sealing structure is undoubtedly increased, and the whole process is tedious and low in efficiency are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing sealing, in particular to a pulley block bearing sealing structure. Background Art

[0002] With the vigorous development of domestic and foreign ports, mines and engineering machinery, large-tonnage lifting equipment has also ushered in rapid growth. In order to meet the stringent requirements of these lifting equipment for high load-bearing capacity and high reliability, the demand for high-quality pulley block bearings is becoming increasingly important. In the actual use of the pulley block bearings, in order to prevent dust and other impurities from invading the interior and thus affecting its normal operation, an effective sealing structure must be adopted to ensure the sealing of the pulley block bearings. For example, the patent application number is: CN202222521840.5, which discloses a pulley block bearing sealing structure. The pulley block is sealed by plugs on both sides and the structural shape of the sleeve shaft housing. With the support of the plug and the side blocks, the wheel group can form a relatively sealed space inside the sleeve housing without affecting the bearing body. However, the design principle of the existing pulley group bearing sealing structure similar to the above is to fix the two blocks with bolts to limit the position of the two plugs, thereby ensuring the effective sealing of the sleeve housing to the bearing. However, since there are two blocks in this structure and they are located on the left and right sides of the structure respectively, this brings certain inconveniences in actual operation. Specifically, when installing or removing the blocks, the staff needs to operate the two bolts separately, which undoubtedly increases the complexity of the disassembly and assembly steps of the sealing structure, making the whole process cumbersome and inefficient. Summary of the Invention

[0003] The disclosed embodiment relates to a pulley bearing sealing structure. This sealing structure enables the positioning and cancellation of two limit rings to be achieved by rotating a rotating shaft, so that the two limit rings can be fixed or loosened synchronously. Compared with the step-by-step fixing or loosening in the comparative documents, the disassembly and installation steps of this sealing structure are simpler and more efficient.

[0004] The first aspect of the present disclosure provides a pulley bearing sealing structure, which specifically includes: a loading shaft, a pulley bearing is fixedly installed at the center of the circumferential outer wall of the loading shaft through an inner ring; a sealing main shell is fixedly installed on the outer ring of the pulley bearing; a pulley body is fixedly installed at the center of the circumferential outer wall of the sealing main shell; sealing plugs are inserted at the left and right ends of the sealing main shell; the sealing plugs are also slidably installed on the loading shaft; limited stop rings are slidably installed at the left and right ends of the loading shaft; the limited stop ring is located on the outside of the sealing plug; a positioning hole is opened on the circumferential inner wall of the limited stop ring; the inner center position of the loading shaft is rotatably installed There is a rotating shaft body; two transmission screws are symmetrically arranged on the circumferential outer wall of the rotating shaft body; the threads of the two transmission screws are opposite to each other; rotating heads are fixedly installed on the left and right ends of the rotating shaft body; horizontal guide grooves are provided on the left and right sides of the interior of the loading shaft rod; vertical guide grooves are also provided on the interior of the loading shaft rod; a push ring is slidably installed on the interior of the horizontal guide groove; the push ring is also connected to the transmission screw through threads; push rods are fixedly installed on the upper and lower sides of the push ring; the inner end of the push rod is an inclined structure; a force-bearing slider is slidably installed on the interior of the vertical guide groove; a positioning column is fixedly installed at the center position of the outer side of the force-bearing slider.

[0005] In at least some embodiments,

[0006] The position of the positioning pin matches the position of the positioning hole; and one end of a restoring spring is embedded in the outer side of the force-bearing sliding block.

[0007] In at least some embodiments,

[0008] The other end of the restoring spring is embedded and installed on the outer wall of the vertical guide groove; a force-bearing groove is opened at the center position of the inner side of the force-bearing sliding block.

[0009] In at least some embodiments,

[0010] The outer end of the force-bearing groove is in an inclined structure; the inclined surface of the inner end of the push rod is in contact with the inclined surface of the outer end of the force-bearing groove.

[0011] In at least some embodiments,

[0012] When the transmission screw drives the push ring to move inwards through rotation, the push ring also drives the push rod to move inwards.

[0013] In at least some embodiments,

[0014] When the pushing rod moves inward, the inclined surface at the inner end of the pushing rod pushes the inclined surface at the outer end of the force-bearing groove.

[0015] In at least some embodiments,

[0016] After being pushed, the inclined surface of the force-bearing groove will move outward with the force-bearing slider and the positioning pin; when the positioning pin moves outward, the outer end of the positioning pin will be inserted into the interior of the positioning socket.

[0017] The utility model provides a pulley block bearing sealing structure, which has the following beneficial effects:

[0018] 1. Two sealing plugs tightly seal the left and right ends of the main sealing housing. The main sealing housing and the sealing plugs work together to form an efficient and reliable sealing system. This sealing structure is designed to provide comprehensive sealing protection for the pulley bearing, effectively blocking the intrusion of dust and other impurities. This not only ensures the smooth operation of the pulley bearing, but also significantly extends its service life, achieving a dual improvement in performance and durability.

[0019] 2. Through structural improvements, this sealing structure realizes the function of conveniently positioning and removing the two limit rings by rotating the rotating shaft, thereby being able to simultaneously fix or release the two limit rings. Compared with the step-by-step fixing and loosening method described in the comparative document, the disassembly and installation process of this sealing structure is more simplified, significantly improving operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0021] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached figure:

[0023] Figure 1 Shows a schematic diagram of the overall structure of this application;

[0024] Figure 2 A schematic diagram of a half-section structure of the sealing main housing and the loading shaft of the present application is shown;

[0025] Figure 3 Shows a schematic diagram of the overall split state structure of this application;

[0026] Figure 4 A schematic diagram of a half-section structure of the sealed main shell of the present application is shown;

[0027] Figure 5 A schematic diagram of the structure of the loading shaft and the limit ring of the present application is shown;

[0028] Figure 6 A schematic diagram of the structure of the push rod and the force-bearing slider of the present application is shown;

[0029] Reference Signs List

[0030] 1. Loading shaft; 2. Pulley bearing; 3. Sealing main housing; 4. Pulley body; 5. Sealing plug; 6. Limit ring; 7. Positioning socket; 8. Rotating shaft; 9. Transmission screw; 10. Rotating head; 11. Horizontal guide groove; 12. Vertical guide groove; 13. Push ring; 14. Push rod; 15. Force slider; 16. Positioning column; 17. Restoring spring; 18. Force groove. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 6 : Example 1: The utility model proposes a pulley bearing sealing structure, including: a loading shaft 1, a pulley bearing 2 is fixedly installed at the center of the circumferential outer wall of the loading shaft 1 through the inner ring; a sealing main shell 3 is fixedly installed on the outer ring of the pulley bearing 2; a pulley body 4 is fixedly installed at the center of the circumferential outer wall of the sealing main shell 3; sealing plugs 5 are inserted at the left and right ends of the sealing main shell 3; the sealing plug 5 is also slidably installed on the loading shaft 1; limited retaining rings 6 are slidably installed at the left and right ends of the loading shaft 1; the limited retaining ring 6 is located on the outside of the sealing plug 5; a positioning hole 7 is opened on the circumferential inner wall of the limited retaining ring 6; a rotating shaft 8 is rotatably installed at the center of the interior of the loading shaft 1; rotating shaft 8 Two transmission screws 9 are symmetrically arranged on the circumferential outer wall of the shaft body 8; the threads of the two transmission screws 9 are opposite; rotating heads 10 are fixedly installed on the left and right ends of the rotating shaft body 8; horizontal guide grooves 11 are provided on the left and right sides of the interior of the loading shaft rod 1; a vertical guide groove 12 is also provided inside the loading shaft rod 1; a push ring 13 is slidably installed inside the horizontal guide groove 11; the push ring 13 is also connected to the transmission screw 9 through threads; push rods 14 are fixedly installed on the upper and lower sides of the push ring 13; the inner end of the push rod 14 is an inclined structure; a force-bearing slider 15 is slidably installed inside the vertical guide groove 12; a positioning column 16 is fixedly installed at the center position of the outer side of the force-bearing slider 15.

[0033] The left and right ends of the sealing main shell 3 are sealed by two sealing plugs 5, so that the sealing main shell 3 and the sealing plug 5 together form a sealing structure. The sealing structure is used to achieve sealing protection for the pulley bearing 2, making the interior of the pulley bearing 2 less likely to be invaded by dust, ensuring the operation effect of the pulley bearing 2 while also extending the service life of the pulley bearing 2 to a certain extent.

[0034] Embodiment 2, based on embodiment 1, the position of the positioning pin 16 matches the position of the positioning hole 7; one end of the restoring spring 17 is embedded in the outer side of the force-bearing slider 15; the other end of the restoring spring 17 is embedded in the outer wall of the vertical guide groove 12; a force groove 18 is opened in the center position of the inner side of the force-bearing slider 15; the outer end of the force groove 18 is an inclined structure; the inclined surface of the inner end of the push rod 14 is in contact with the inclined surface of the outer end of the force groove 18.

[0035] By sliding the two limit stop rings 6 onto the left and right ends of the loading shaft 1, the inner sides of the two limit stop rings 6 are respectively fitted with the outer sides of the two sealing plugs 5. At this time, the position of the vertical guide groove 12 will correspond to the position of the positioning socket 7. Then, the rotating head 10 is rotated manually using a tool to rotate it with the rotating shaft 8 and the transmission screw 9, so that the two transmission screws 9 use opposite threads to drive the two push rings 13 and the two sets of push rods 14 to move inward relative to each other, so that the inclined surfaces of the inner ends of the two sets of push rods 14 push the inclined surfaces of the force-bearing grooves 18, so that the inclined surfaces of the force-bearing grooves 18 are affected by the pushing and move the force slider 15 and the positioning plug 16 outward, so that the positioning plug 16 is inserted into the interior of the positioning socket 7 by moving outward, thereby realizing the synchronous positioning of the two limit stop rings 6, so that the two limit stop rings 6 position the two sealing plugs 5, so that the sealing plug 5 and the sealing main shell 3 are kept in a sealed state.

[0036] Example three, based on Example two, when the transmission screw 9 rotates and moves the push ring 13 inward, the push ring 13 will also move the push rod 14 inward; when the push rod 14 moves inward, the inclined surface at the inner end of the push rod 14 will push the inclined surface at the outer end of the force groove 18; after being pushed, the inclined surface of the force groove 18 will move outward with the force slider 15 and the positioning column 16; when the positioning column 16 moves outward, the outer end of the positioning column 16 will be inserted into the inside of the positioning socket 7.

[0037] When it is necessary to lubricate and maintain the pulley bearing 2 inside the sealing structure, the transmission screw 9 is reversed to move it outward with the push ring 13 and the push rod 14, so that the push rod 14 cancels the push on the force groove 18, and the force slider 15 moves inward with the positioning pin 16 under the action of the return spring 17, so that the positioning pin 16 is disengaged from the inside of the positioning socket 7, thereby canceling the positioning of the limit ring 6, facilitating the disassembly of the limit ring 6 and the sealing plug 5, and opening the sealing structure composed of the sealing plug 5 and the sealing main shell 3, so as to facilitate the lubrication and maintenance of the pulley bearing 2 inside the sealing structure.

[0038] The working principle of this embodiment is as follows:

[0039] When sealing, the two limit stop rings 6 are slidably installed on the left and right ends of the loading shaft 1, so that the inner sides of the two limit stop rings 6 are respectively fitted with the outer sides of the two sealing plugs 5. At this time, the position of the vertical guide groove 12 will correspond to the position of the positioning socket 7. Then, the rotating head 10 is rotated manually using a tool to rotate it with the rotating shaft 8 and the transmission screw 9, so that the two transmission screws 9 use opposite threads to drive the two push rings 13 and the two sets of push rods 14 to move inward relative to each other, so that the inclined surfaces of the inner ends of the two sets of push rods 14 push the inclined surfaces of the force-bearing grooves 18, so that the inclined surfaces of the force-bearing grooves 18 are affected by the pushing and move the force slider 15 and the positioning plug 16 outward, so that the positioning plug 16 is inserted into the interior of the positioning socket 7 by moving outward, thereby realizing the synchronous positioning of the two limit stop rings 6. The two limit rings 6 position the two sealing plugs 5, so that the sealing plugs 5 and the sealing main shell 3 are kept in a sealed state, and the pulley bearing 2 works in a sealed space. When it is necessary to lubricate and maintain the pulley bearing 2 inside the sealing structure, the transmission screw 9 is reversed to move it outward with the push ring 13 and the push rod 14, so that the push rod 14 cancels the push on the force groove 18, and the force slider 15 moves inward with the positioning pin 16 under the action of the return spring 17, so that the positioning pin 16 is disengaged from the inside of the positioning socket 7, thereby canceling the positioning of the limit ring 6, facilitating the disassembly of the limit ring 6 and the sealing plug 5, and opening the sealing structure composed of the sealing plug 5 and the sealing main shell 3, so as to facilitate the lubrication and maintenance of the pulley bearing 2 inside the sealing structure.

[0040] In this article, there are several points to note:

[0041] 1. The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0042] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0043] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. Pulley block bearing sealing structure, including: A loading shaft (1) is provided, wherein a pulley bearing (2) is fixedly installed at the center of the circumferential outer wall of the loading shaft (1) through the inner ring; a sealing main shell (3) is fixedly installed on the outer ring of the pulley bearing (2); a pulley body (4) is fixedly installed at the center of the circumferential outer wall of the sealing main shell (3); it is characterized in that sealing plugs (5) are inserted at the left and right ends of the sealing main shell (3); the sealing plug (5) is also slidably installed on the loading shaft (1); a limit ring (6) is slidably installed at the left and right ends of the loading shaft (1); the limit ring (6) is located on the outside of the sealing plug (5); a positioning hole (7) is opened on the circumferential inner wall of the limit ring (6); a rotating shaft (8) is rotatably installed at the center of the interior of the loading shaft (1); the circumference of the rotating shaft (8) is Two transmission screws (9) are symmetrically arranged on the outer wall; the threads of the two transmission screws (9) are opposite; a rotating head (10) is fixedly installed on the left and right ends of the rotating shaft (8); a horizontal guide groove (11) is opened on the left and right sides of the interior of the loading shaft (1); a vertical guide groove (12) is also opened inside the loading shaft (1); a push ring (13) is slidably installed inside the horizontal guide groove (11); the push ring (13) is also connected to the transmission screw (9) through the thread; a push rod (14) is fixedly installed on the upper and lower sides of the push ring (13); the inner end of the push rod (14) is in an inclined structure; a force slider (15) is slidably installed inside the vertical guide groove (12); a positioning column (16) is fixedly installed at the center position of the outer side of the force slider (15).

2. The pulley block bearing sealing structure according to claim 1, characterized in that: The position of the positioning pin (16) matches the position of the positioning socket (7); one end of a restoring spring (17) is embedded and installed on the outer side of the force-bearing slider (15).

3. The pulley block bearing sealing structure according to claim 2, characterized in that: The other end of the restoring spring (17) is embedded and mounted on the outer wall of the vertical guide groove (12); a force groove (18) is provided at the center of the inner side of the force-bearing sliding block (15).

4. The pulley block bearing sealing structure according to claim 3, characterized in that: The outer end of the force-bearing groove (18) is in an inclined structure; the inclined surface of the inner end of the push rod (14) is in contact with the inclined surface of the outer end of the force-bearing groove (18).

5. The pulley block bearing sealing structure according to claim 4, characterized in that: When the transmission screw (9) moves inwardly with the push ring (13) by rotating, the push ring (13) also moves inwardly with the push rod (14).

6. The pulley block bearing sealing structure according to claim 5, characterized in that: When the push rod (14) moves inward, the inclined surface at the inner end of the push rod (14) pushes the inclined surface at the outer end of the force groove (18).

7. The pulley block bearing sealing structure according to claim 6, characterized in that: When the inclined surface of the force-bearing groove (18) is pushed, it will move outward with the force-bearing slider (15) and the positioning pin (16); when the positioning pin (16) moves outward, the outer end of the positioning pin (16) will be inserted into the interior of the positioning socket (7).

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