A durable chain wheel assembly for a hydraulic freight elevator

Abstract

This utility model discloses a durable chain wheel assembly for a hydraulic freight elevator, relating to the field of lifting equipment manufacturing technology, including a shaft pin and a lubrication assembly; the shaft pin: a bearing inner ring is sleeved on the circumferential surface, and a bearing outer ring is provided outside the bearing inner ring. Evenly distributed bearing balls are arranged between the bearing inner ring and the bearing outer ring. A sprocket ring is fixed to the surface of the bearing outer ring. A sealing assembly and a flow guiding assembly are installed at the left end of the shaft pin surface, and a fastening assembly and a fixing assembly are installed at the right end of the shaft pin surface. The fixing assembly and the sealing assembly cooperate with each other; the lubrication assembly: includes an oil injection hole, a filter screen, and an oil outlet pipe. An oil injection hole is opened in the middle of the shaft pin, and an installation groove is opened at the right end of the shaft pin. The installation groove communicates with the oil injection hole, enabling periodic and rapid lubrication, as well as quick maintenance and replacement.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment manufacturing technology, specifically a durable chain wheel assembly for hydraulic freight elevators. Background Technology

[0002] In the operating system of hydraulic freight elevators, the chain wheel assembly is a key transmission component, and its performance directly affects the stability and service life of the equipment. Currently, common chain wheel assemblies typically employ a pin-and-bearing structure, transmitting power through the meshing of the sprocket rings and chain. To ensure smooth operation, some designs incorporate ball bearings with inner and outer ring mating to reduce friction, while external sealing structures prevent contaminant intrusion. However, existing chain wheel assemblies still face numerous challenges during long-term, high-load operation.

[0003] Existing chain wheel assemblies still have significant shortcomings in practical use. On the one hand, the lack of effective built-in lubrication channels makes it difficult to regularly lubricate the bearing interior, leading to increased wear between the balls and the inner and outer rings, which not only generates noise but also shortens the service life. On the other hand, conventional sealing structures are prone to aging or deformation after long-term use, allowing external impurities to easily enter the bearing area and further accelerate wear. Therefore, we propose a durable chain wheel assembly for hydraulic freight elevators. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a durable chain wheel assembly for hydraulic freight elevators that can be quickly lubricated on a regular basis, and can be quickly maintained and replaced, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a durable chain wheel assembly for a hydraulic freight elevator, including a shaft pin and a lubrication assembly; Shaft pin: A bearing inner ring is fitted onto the circumferential surface, and a bearing outer ring is provided outside the bearing inner ring. Bearing balls are evenly distributed between the bearing inner ring and the bearing outer ring. A sprocket ring is fixed to the surface of the bearing outer ring. A sealing component and a flow guiding component are installed on the left end of the shaft pin surface. A fastening component is installed on the right end of the shaft pin surface. A fixing component is installed on the right end of the shaft pin surface. The fixing component and the sealing component cooperate with each other. Lubrication assembly: includes an oil injection hole, a filter screen, and an oil outlet pipe. The shaft pin has an oil injection hole in the middle and an installation groove at its right end, which communicates with the oil injection hole. The left end of the installation groove has a recess, and the filter screen is placed inside the recess. The surface of the shaft pin has evenly distributed oil outlet holes, and an oil outlet pipe is fixed inside each oil outlet hole. All oil outlet pipes communicate with the oil injection hole. The end of each oil outlet pipe away from the oil outlet hole corresponds to the gap between the inner and outer rings of the bearing. The lubrication assembly facilitates the lubrication of the bearing balls.

[0006] Furthermore, the flow guiding assembly includes a fixing ring and a flow guiding ring. The fixing ring is fixed on the circumferential surface of the shaft pin, and the flow guiding ring is fixed at the right end of the fixing ring. The flow guiding ring is located at the left end of the inner ring surface of the bearing. An annular flow guiding groove is formed on the circumferential surface of the flow guiding ring. All oil outlet pipes correspond to the annular flow guiding groove. The flow guiding assembly is used to temporarily store and guide the lubricant.

[0007] Furthermore, the fixing assembly includes a retaining pin, a connecting ring, a fastening nut, a first rubber sealing ring, and a sealing ring. Two corresponding retaining grooves are formed at both ends of the inner ring of the bearing. Retaining pins are engaged inside the retaining grooves. The two retaining pins on the left are fixed to the surface of the shaft pin, and the right ends of the two retaining pins on the right are fixed to the connecting rings. The connecting rings are sleeved on the surface of the shaft pin. A fastening nut is threaded onto the surface of the shaft pin, and the fastening nut fits against the right end of the connecting ring. A sealing ring is fixed to the circumference of the connecting ring. A first rubber sealing ring is fixed to the left end of the sealing ring. Annular sealing grooves are formed at both ends of the outer ring of the bearing. The first rubber sealing ring is engaged inside the annular sealing groove on the right side. The fixing assembly fixes the inner ring of the bearing, and the first rubber sealing ring and the sealing ring seal the right ends of both the inner and outer rings of the bearing.

[0008] Furthermore, the sealing assembly includes a sealing cover and a second rubber sealing ring. The sealing cover is fixed to the left end of the shaft pin surface, and all oil outlet pipes are located inside the sealing groove. The second rubber sealing ring is fixed to the right end of the sealing cover. The second rubber sealing ring is snapped into the inside of the annular sealing groove opened on the left side of the bearing outer ring. By setting the sealing assembly, the bearing inner ring and the left end of the bearing outer ring are sealed.

[0009] Furthermore, the fastening assembly includes an external threaded ring, a guide tube, and a grease fitting. The mounting groove at the right end of the shaft pin is internally threaded with an external threaded ring. The left end of the external threaded ring is fitted with the right end of the filter screen. The guide tube is fixed to the right end of the external threaded ring. A grease fitting is installed at the right end inside the guide tube. The filter screen is fixed by setting the fastening assembly.

[0010] Furthermore, an anti-slip ring is fixed on the circumferential surface of the guide tube, and the anti-slip ring has evenly distributed anti-slip grooves on its circumferential surface. By setting the anti-slip ring, it is convenient for users to rotate the guide tube to disassemble the external threaded ring, and then the filter screen can be easily cleaned or replaced.

[0011] Furthermore, a mounting plate is fixed to the left end of the shaft pin, and the edge of the mounting plate is provided with evenly distributed mounting holes. The shaft pin is fixed by setting the mounting plate and mounting holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This durable chain wheel assembly for hydraulic freight elevators has the following advantages: 1. By setting a lubrication component and a flow guiding component in combination, the lubricating oil can enter through the oil injection hole and be evenly guided to the bearing balls and the contact surfaces of the inner and outer rings through the oil outlet pipe, so as to achieve continuous and efficient lubrication, significantly reduce friction loss and operating noise, and thus greatly improve the durability and stability of the chain wheel assembly.

[0013] 2. Through the synergistic effect of the fixing components and the sealing components, a multi-level sealing barrier is formed by the first rubber sealing ring, the sealing ring and the second rubber sealing ring, which effectively isolates external dust, moisture and other pollutants from entering the bearing, while preventing lubricating grease leakage. This not only extends the service life of the bearing, but also reduces the maintenance frequency and operating costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the sprocket ring structure of this utility model.

[0015] In the diagram: 1. Shaft pin; 2. Lubrication assembly; 21. Oil injection hole; 22. Filter screen; 23. Oil outlet pipe; 3. Flow guide assembly; 31. Fixing ring; 32. Flow guide ring; 4. Fixing assembly; 41. Locking pin; 42. Connecting ring; 42. Fastening nut; 43. First rubber sealing ring; 44. Sealing ring; 5. Sealing assembly; 51. Sealing cover; 52. Second rubber sealing ring; 6. Fastening assembly; 61. External threaded ring; 62. Flow guide pipe; 63. Grease nipple; 7. Anti-slip ring; 8. Mounting plate; 9. Mounting hole; 10. Bearing inner ring; 11. Bearing outer ring; 12. Bearing ball; 13. Sprocket ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 This embodiment provides a technical solution: a durable chain wheel assembly for a hydraulic freight elevator, including a shaft pin 1 and a lubrication assembly 2; Shaft pin 1: A bearing inner ring 10 is fitted onto the circumferential surface of the shaft pin 1. A bearing outer ring 11 is disposed outside the bearing inner ring 10. Bearing balls 12 are evenly distributed between the bearing inner ring 10 and the bearing outer ring 11. A sprocket ring 13 is fixed to the surface of the bearing outer ring 11. A sealing assembly 5 and a flow guiding assembly 3 are installed on the left end of the surface of the shaft pin 1. A fastening assembly 6 is installed on the right end of the surface of the shaft pin 1. A fixing assembly 4 is installed on the right end of the surface of the shaft pin 1. The fixing assembly 4 and the sealing assembly 5 cooperate with each other. The flow guiding assembly 3 includes a fixing ring 31 and a flow guiding ring 32. The fixing ring 31 is fixed on the circumferential surface of the shaft pin 1. The flow guiding ring 32 is fixed to the right end of the fixing ring 31. The flow guiding ring 32 is located at the left end of the surface of the bearing inner ring 10. An annular guide groove is formed on the circumferential surface of bearing 32. All oil outlet pipes 23 correspond to the annular guide groove. The fixing component 4 includes a retaining post 41, a connecting ring 42, a fastening nut 42, a first rubber sealing ring 43, and a sealing ring 44. Two corresponding retaining grooves are formed at both ends of the inner ring 10 of the bearing. The retaining post 41 is engaged inside the retaining groove. The two retaining posts 41 on the left are fixed to the surface of the shaft pin 1. The right ends of the two retaining posts 41 on the right are fixed to the connecting ring 42. The connecting ring 42 is sleeved on the surface of the shaft pin 1. The surface of the shaft pin 1 is threaded with a fastening nut 42. The fastening nut 42 fits against the right end of the connecting ring 42. A sealing ring 44 is fixed on the circumferential surface of the connecting ring 42. The left end of the bearing pin 1 is fixed with a first rubber sealing ring 43. Both ends of the bearing outer ring 11 have annular sealing grooves. The first rubber sealing ring 43 is engaged inside the annular sealing groove on the right side. The bearing inner ring 10 is fixed by the fixing assembly 4. The sealing assembly 5 includes a sealing cover 51 and a second rubber sealing ring 52. The left end of the surface of the shaft pin 1 is fixed with a sealing cover 51. All oil outlet pipes 23 are located inside the sealing groove 51. The right end of the sealing cover 51 is fixed with a second rubber sealing ring 52, which is engaged inside the annular sealing groove on the left side of the bearing outer ring 11. The fastening assembly 6 includes an external threaded ring 61, a guide pipe 62, and a grease nipple 63. The right end of the shaft pin 1 has an external threaded ring 61, a guide pipe 62, and a grease nipple 63. The mounting groove has an internal threaded connection to an external threaded ring 61. The left end of the external threaded ring 61 fits against the right end of the filter screen 22. A guide tube 62 is fixed to the right end of the external threaded ring 61. A grease nipple 63 is installed inside the guide tube 62. The filter screen 22 is fixed by a fastening assembly 6. The left end of the bearing inner ring 10 and bearing outer ring 11 is sealed by a sealing assembly 5. The right end of the bearing inner ring 10 and bearing outer ring 11 is sealed by a first rubber sealing ring 43 and a sealing ring 44. The lubricant is temporarily stored and guided by a guide assembly 3. The sprocket ring 13 is made of high-strength alloy material (such as 20CrMnTi) and is carburized and quenched, which significantly improves the hardness of the tooth surface. Lubrication assembly 2 includes an oil injection hole 21, a filter screen 22, and an oil outlet pipe 23. The oil injection hole 21 is provided in the middle of the shaft pin 1, and an installation groove is provided at the right end of the shaft pin 1. The installation groove communicates with the oil injection hole 21. A groove is provided at the left end of the installation groove, and the filter screen 22 is placed inside the groove. Oil outlet holes are evenly distributed on the surface of the shaft pin 1. An oil outlet pipe 23 is fixed inside the oil outlet hole. All oil outlet pipes 23 communicate with the oil injection hole 21. The end of the oil outlet pipe 23 away from the oil outlet hole 21 corresponds to the gap between the inner ring 10 and the outer ring 11 of the bearing. By setting the lubrication assembly 2, it is convenient to lubricate the bearing balls 12.

[0018] Among them, an anti-slip ring 7 is fixed on the circumferential surface of the guide tube 62. The anti-slip ring 7 has evenly distributed anti-slip grooves on its circumferential surface. By setting the anti-slip ring 7, it is convenient for users to rotate the guide tube 62 to disassemble the external threaded ring 61, and then the filter screen 22 can be easily cleaned or replaced.

[0019] Wherein: the left end of the shaft pin 1 is fixed with a mounting plate 8, and the edge of the mounting plate 8 is provided with evenly distributed mounting holes 9, and the shaft pin 1 is fixed by setting the mounting plate 8 and the mounting holes 9.

[0020] The working principle of the durable chain wheel assembly for a hydraulic freight elevator provided by this utility model is as follows: Lubricating oil is injected into the oil injection hole 21 of the shaft pin 1 through the grease nipple 63 and the guide pipe 62. After impurities are filtered by the filter screen 22, the clean lubricating oil flows out through the oil outlet pipe 23 and enters the annular guide groove of the guide ring 32 for temporary storage and guidance. The lubricating oil then evenly penetrates into the gap between the inner ring 10 and the outer ring 11 of the bearing, continuously lubricating the bearing balls 12 and effectively reducing friction and wear. During this process, the second rubber sealing ring 52 of the sealing assembly 5 and the first rubber sealing ring 43 of the fixing assembly 4 and the sealing ring 52 are connected. Ring 44 is tightly fitted into the annular sealing grooves on both sides of the outer ring 11 of the bearing, forming a two-way sealing barrier to prevent lubricating oil leakage and block external contaminants from entering the bearing. When maintenance is required, the user can rotate the guide tube 62 through the anti-slip ring 7 to drive the external threaded ring 61 out, thereby cleaning or replacing the filter screen 22 and ensuring the long-term unobstructed flow of the lubrication channel. The entire assembly is fixedly installed through the mounting plate 8 and mounting hole 9. The shaft pin 1 remains stationary while the sprocket ring 13 rotates with the outer ring 11 of the bearing to realize power transmission. Its built-in lubrication and sealing structure significantly improves the durability and reliability under the high-load operation conditions of the hydraulic freight elevator.

[0021] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A durable chain wheel assembly for a hydraulic freight elevator, characterized in that: Includes a shaft pin (1) and a lubrication assembly (2); Shaft pin (1): A bearing inner ring (10) is sleeved on the circumferential surface. A bearing outer ring (11) is provided outside the bearing inner ring (10). Bearing balls (12) are evenly distributed between the bearing inner ring (10) and the bearing outer ring (11). A sprocket ring (13) is fixed on the surface of the bearing outer ring (11). A sealing component (5) and a flow guiding component (3) are installed on the left end of the surface of the shaft pin (1). A fastening component (6) is installed on the right end of the shaft pin (1). A fixing component (4) is installed on the right end of the surface of the shaft pin (1). The fixing component (4) and the sealing component (5) cooperate with each other. Lubrication assembly (2): includes an oil injection hole (21), a filter screen (22) and an oil outlet pipe (23). The middle part of the shaft pin (1) is provided with an oil injection hole (21). The right end of the shaft pin (1) is provided with an installation groove. The installation groove is connected to the oil injection hole (21). The left end of the installation groove is provided with a groove. The filter screen (22) is placed inside the groove. The surface of the shaft pin (1) is provided with evenly distributed oil outlet holes. The oil outlet pipe (23) is fixed inside the oil outlet hole. All the oil outlet pipes (23) are connected to the oil injection hole (21). The end of the oil outlet pipe (23) away from the oil outlet hole (21) corresponds to the gap between the inner ring (10) and the outer ring (11) of the bearing.

2. The durable chain wheel assembly for a hydraulic freight elevator according to claim 1, characterized in that: The flow guiding assembly (3) includes a fixed ring (31) and a flow guiding ring (32). The fixed ring (31) is fixed on the circumferential surface of the shaft pin (1). The flow guiding ring (32) is fixed at the right end of the fixed ring (31). The flow guiding ring (32) is located at the left end of the surface of the inner ring (10) of the bearing. An annular flow guiding groove is opened on the circumferential surface of the flow guiding ring (32). All the oil outlet pipes (23) correspond to the annular flow guiding groove.

3. A durable chain wheel assembly for a hydraulic freight elevator according to claim 1, characterized in that: The fixing component (4) includes a locking pin (41), a connecting ring (42), a fastening nut (42), a first rubber sealing ring (43), and a sealing ring (44). The inner ring (10) of the bearing has two corresponding locking grooves at both ends. The locking pins (41) are locked inside the locking grooves. The two locking pins (41) on the left are fixed to the surface of the shaft pin (1). The right ends of the two locking pins (41) on the right are fixed with connecting rings (42). The connecting rings (42) are sleeved on the surface of the shaft pin (1). The surface of the shaft pin (1) is threaded with a fastening nut (42). The fastening nut (42) is in contact with the right end of the connecting ring (42). The sealing ring (44) is fixed on the circumferential surface of the connecting ring (42). The left end of the sealing ring (44) is fixed with a first rubber sealing ring (43). The outer ring (11) of the bearing has annular sealing grooves at both ends. The first rubber sealing ring (43) is locked inside the annular sealing groove on the right.

4. A durable chain wheel assembly for a hydraulic freight elevator according to claim 3, characterized in that: The sealing assembly (5) includes a sealing cover (51) and a second rubber sealing ring (52). The sealing cover (51) is fixed to the left end of the surface of the shaft pin (1). All the oil outlet pipes (23) are located inside the sealing groove (51). The second rubber sealing ring (52) is fixed to the right end of the sealing cover (51). The second rubber sealing ring (52) is snapped into the inside of the annular sealing groove opened on the left side of the bearing outer ring (11).

5. A durable chain wheel assembly for a hydraulic freight elevator according to claim 1, characterized in that: The fastening assembly (6) includes an external threaded ring (61), a guide tube (62), and a grease nipple (63). The internal thread of the mounting groove at the right end of the shaft pin (1) is connected to the external threaded ring (61). The left end of the external threaded ring (61) is in contact with the right end of the filter screen (22). The guide tube (62) is fixed at the right end of the external threaded ring (61). The grease nipple (63) is installed at the right end inside the guide tube (62).

6. A durable chain wheel assembly for a hydraulic freight elevator according to claim 1, characterized in that: An anti-slip ring (7) is fixed on the circumferential surface of the guide tube (62), and the anti-slip ring (7) has uniformly distributed anti-slip grooves on its circumferential surface.

7. A durable chain wheel assembly for a hydraulic freight elevator according to claim 1, characterized in that: The left end of the shaft pin (1) is fixed with a mounting plate (8), and the edge of the mounting plate (8) is provided with evenly distributed mounting holes (9).

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