Split type pulley

Abstract

The utility model relates to a split type pulley. The technical problems that an existing transmission effect is poor, the transmission effect is not stable in the using process, and replacement is difficult are solved. Comprising a pulley body with a mounting hole, one end of the mounting hole is provided with a pulley body sealing part extending inwards in the radial direction, the other end of the mounting hole is provided with an opening connected with the mounting hole, a pulley bearing is movably arranged on the inner side of the mounting hole, and the end, close to the opening, of the pulley body is provided with a hollow sealing cover. One end of the sealing cover body axially penetrates through the pulley bearing to the circumferential inner side of the wheel body sealing part through the opening, and a rolling limiting assembly corresponding to the pulley bearing is arranged between the sealing cover body and the wheel body sealing part. The pulley has the advantages that the pulley bearing is installed in the pulley body and fixed through the sealing cover body, so that the pulley bearing can be prevented from being separated from the pulley body, meanwhile, the sealing cover body and the pulley body are of a split structure, replacement is facilitated when damage occurs, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of pulley equipment technology, specifically relating to a split-type pulley. Background Technology

[0002] Pulley systems are key components in many pieces of equipment, widely used in daily life and industrial operations. Pulleys are simple machines used to lift heavy objects and reduce labor. They require the use of ropes, and to ensure stable operation of the pulley and wire rope under various working conditions, rope grooves are often incorporated into the pulley. However, existing pulleys suffer from structural design deficiencies, resulting in poor transmission efficiency in actual use, impacting work efficiency. Furthermore, pulleys wear down over prolonged use, leading to instability during operation and difficulties in replacement. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a split-type pulley.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a split-type pulley, comprising a pulley body with a mounting hole, a radially inwardly extending wheel body sealing portion at one end of the mounting hole, and an opening connected to the mounting hole at the other end of the mounting hole. A pulley bearing is movably mounted inside the mounting hole. A hollow sealing cover is provided at one end of the pulley body near the opening. One end of the sealing cover axially penetrates the pulley bearing through the opening to the circumferentially inner side of the wheel body sealing portion. A rolling limiting component corresponding to the pulley bearing is provided between the sealing cover and the wheel body sealing portion. The sealing cover and the pulley body can rotate independently through the rolling limiting component, improving transmission performance and stability. The pulley bearing is mounted inside the pulley body and fixed by the sealing cover, thus ensuring the robustness of the pulley bearing.

[0005] In the aforementioned split-type pulley, one end of the sealing cover is provided with a cover sealing portion, and one end of the cover sealing portion is provided with an axially extending cover extension portion. The sum of the length of the cover extension portion and the thickness of the cover sealing portion is equal to the sum of the depth of the mounting hole and the thickness of the pulley body sealing portion. The cover extension portion is used to fix the pulley bearing, preventing the pulley bearing from shaking during operation. The cover sealing portion is used to close the mounting hole, preventing the pulley bearing from detaching from the pulley body.

[0006] In the aforementioned split-type pulley, the inner circumferential side of the wheel body sealing part is provided with a circular hole, which communicates with the mounting hole. The end of the cover extension away from the cover sealing part axially passes through the pulley bearing into the circular hole. This ensures the overall sealing performance of the pulley, thereby improving the overall operational stability.

[0007] In the aforementioned split-type pulley, the end face of the cover sealing portion away from the cover extension portion is flush with the end face of the pulley body, and the end face of the cover extension portion away from the cover sealing portion does not protrude from the end face of the pulley body sealing portion.

[0008] In the aforementioned split-type pulley, the inner sides of both ends of the cover extension are respectively provided with arc-shaped portions, and there is a horizontal portion between the arc-shaped portions. The diameter of the cover sealing portion is equal to the diameter of the mounting hole, and the diameter of the cover extension is equal to the diameter of the circular hole.

[0009] In the aforementioned split-type pulley, a bearing groove is formed between the cover sealing portion, the cover extension portion, the wheel sealing portion, and the pulley body. The pulley bearing is disposed within the bearing groove, with its inner side contacting the cover extension portion and its outer side contacting the pulley body. During pulley operation, the pulley body and the sealing cover are unaffected, thereby improving transmission performance.

[0010] In the aforementioned split-type pulley, the pulley bearing has an outer ring portion on its outer circumferential side and an inner ring portion on its inner circumferential side. A plurality of rolling elements are arranged sequentially between the outer ring portion and the inner ring portion.

[0011] In the aforementioned split-type pulley, the outer ring portion abuts against the pulley body on the side away from the inner ring portion, and the inner ring portion abuts against the cover extension on the side away from the outer ring portion.

[0012] In the aforementioned split-type pulley, the rolling limiting assembly includes a first limiting boss located on the inner side of the cover sealing portion near the end of the cover extension, and a second limiting boss located on the outer side of the wheel sealing portion near the pulley body. The inner ring portion, away from the wheel sealing portion, contacts the first limiting boss, and the outer ring portion, away from the cover sealing portion, contacts the second limiting boss. The positions of the first and second limiting bosses are designed to fix the pulley bearing. The first limiting boss ensures a firm fit between the inner ring portion and the sealing cover, and the second limiting boss ensures a firm fit between the outer ring portion and the pulley body.

[0013] In the aforementioned split-type pulley, the pulley body has a roller groove on its outer circumference, and roller protrusions are provided at both ends of the roller groove. The bottom of the roller groove has a semi-circular structure, and the roller protrusions have an inclined portion on the side away from the roller groove.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] 1. This device installs the pulley bearing inside the pulley body and fixes it with a sealing cover. This prevents the pulley bearing from coming off the pulley body. At the same time, the sealing cover and the pulley body adopt a separate structure, which facilitates replacement when damage occurs and improves work efficiency.

[0016] 2. This device utilizes a rolling limiting component to ensure that the outer ring of the pulley bearing contacts the pulley body, and the inner ring of the pulley bearing contacts the sealing cover, thereby ensuring the stability of the pulley during operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is an exploded view of the structure of this utility model.

[0019] Figure 3 This is a structural cross-sectional view of the present invention.

[0020] Figure 4 This is a schematic diagram of the pulley body in this utility model.

[0021] In the figure: pulley body 1, mounting hole 11, opening 12, roller groove 13, roller protrusion 14, inclined part 15, wheel body sealing part 2, round hole 21, pulley bearing 3, outer ring part 31, inner ring part 32, rolling element 33, sealing cover 4, cover sealing part 41, cover extension part 42, arc-shaped part 43, horizontal part 44, rolling limit assembly 5, first limit boss 51, second limit boss 52, bearing groove 6. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-4 As shown, a split-type pulley includes a pulley body 1 with a mounting hole 11. One end of the mounting hole 11 has a radially inwardly extending wheel body sealing portion 2, and the other end of the mounting hole 11 has an opening 12 connected to the mounting hole 11. A pulley bearing 3 is movably mounted inside the mounting hole 11. A hollow sealing cover 4 is provided near the opening 12 at one end of the pulley body 1. One end of the sealing cover 4 axially penetrates the pulley bearing 3 through the opening 12 to the circumferentially inward side of the wheel body sealing portion 2. A rolling limiting component 5 corresponding to the pulley bearing 3 is provided between the sealing cover 4 and the wheel body sealing portion 2. The sealing cover 4 and the pulley body 1 can rotate independently through the rolling limiting component 5, improving transmission performance and stability. The pulley bearing 3 is installed inside the pulley body 1 and fixed by the sealing cover 4, ensuring the robustness of the pulley bearing 3.

[0024] Combination Figure 2 and Figure 3As shown, one end of the sealing cover 4 is provided with a cover sealing part 41, and one end of the cover sealing part 41 is provided with an axially extending cover extension part 42. The sum of the length of the cover extension part 42 and the thickness of the cover sealing part 41 is equal to the sum of the depth of the mounting hole 11 and the thickness of the wheel body sealing part 2. The cover extension part 42 is used to fix the pulley bearing 3 to prevent the pulley bearing 3 from shaking during operation. The cover sealing part 41 is used to close the mounting hole 11 to prevent the pulley bearing 3 from detaching from the pulley body 1.

[0025] Combination Figure 3 and Figure 4 As shown, the wheel sealing part 2 has a circular hole 21 on its inner circumference, which is connected to the mounting hole 11. The end of the cover extension 42 away from the cover sealing part 41 axially passes through the pulley bearing 3 into the circular hole 21. This ensures the overall sealing of the pulley, thereby improving the overall operational stability.

[0026] Among them, the end face of the cover sealing part 41 away from the cover extension part 42 is flush with the end face of the pulley body 1, and the end of the cover extension part 42 away from the cover sealing part 41 does not protrude from the end face of the pulley body sealing part 2.

[0027] Specifically, the inner sides of both ends of the cover extension 42 are provided with arc-shaped portions 43, and there is a horizontal portion 44 between the arc-shaped portions 43. The diameter of the cover sealing portion 41 is equal to the diameter of the mounting hole 11, and the diameter of the cover extension 42 is equal to the diameter of the circular hole 21.

[0028] Furthermore, a bearing groove 6 is formed between the cover sealing part 41, the cover extension part 42, the wheel sealing part 2, and the pulley body 1. The pulley bearing 3 is disposed in the bearing groove 6, with the inner side of the pulley bearing 3 contacting the cover extension part 42 and the outer side of the pulley bearing 3 contacting the pulley body 1. During pulley operation, the pulley body 1 and the sealing cover 4 are not affected, thereby improving the transmission performance.

[0029] Combination Figure 2 and Figure 3 As shown, the pulley bearing 3 has an outer ring portion 31 on the outer side and an inner ring portion 32 on the inner side. A plurality of rolling elements 33 are arranged sequentially between the outer ring portion 31 and the inner ring portion 32.

[0030] The outer ring portion 31 abuts against the pulley body 1 on the side away from the inner ring portion 32, and the inner ring portion 32 abuts against the cover extension portion 42 on the side away from the outer ring portion 31.

[0031] Specifically, the rolling limiting assembly 5 includes a first limiting boss 51 located on the inner side of the cover sealing portion 41 near the end of the cover extension portion 42, and a second limiting boss 52 located on the outer side of the wheel sealing portion 2 near the end of the pulley body 1. The inner ring portion 32, away from the wheel sealing portion 2, contacts the first limiting boss 51, and the outer ring portion 31, away from the cover sealing portion 41, contacts the second limiting boss 52. The positions of the first limiting boss 51 and the second limiting boss 52 are designed to fix the pulley bearing 3. The first limiting boss 51 ensures that the inner ring portion 32 is firmly attached to the sealing cover 4, and the second limiting boss 52 ensures that the outer ring portion 31 is firmly attached to the pulley body 1.

[0032] Combination Figure 1 and Figure 2 As shown, the pulley body 1 has a roller groove 13 on the outer side around the circumference, and roller protrusions 14 are provided at both ends of the roller groove 13. The bottom of the roller groove 13 has a semi-circular structure, and the roller protrusions 14 have an inclined part 15 on the side away from the roller groove 13.

[0033] The principle of this embodiment is as follows:

[0034] The pulley bearing 3 is installed in the mounting hole 11 of the pulley body 1 through the opening 12. The cover extension 42 of the sealing cover 4 is located inside the pulley bearing 3. The cover sealing part 41 of the sealing cover 4 closes the opening 12, thus fixing the pulley bearing 3. When the sealing cover 4 is installed in the pulley body 1, the first limiting boss 51 on the sealing cover 4 contacts the inner ring part 32, and the second limiting boss 52 on the pulley body 1 contacts the outer ring part 31. At the same time, the side of the inner ring part 32 away from the outer ring part 31 fits against the sealing cover 4, and the side of the outer ring part 31 away from the inner ring part 32 fits against the pulley body 1. In this way, the pulley body 1 and the sealing cover 4 can rotate independently, thereby improving the overall transmission performance and stability.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0036] Although this document frequently uses terms such as pulley body 1, mounting hole 11, opening 12, roller groove 13, roller protrusion 14, inclined portion 15, wheel body sealing portion 2, round hole 21, pulley bearing 3, outer ring portion 31, inner ring portion 32, rolling element 33, sealing cover 4, cover sealing portion 41, cover extension portion 42, arc-shaped portion 43, horizontal portion 44, rolling limiting assembly 5, first limiting boss 51, second limiting boss 52, and bearing groove 6, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A split-type pulley, comprising a pulley body (1) having a mounting hole (11), characterized in that, The mounting hole (11) has a wheel sealing part (2) extending radially inward at one end, and an opening (12) connected to the mounting hole (11) at the other end. A pulley bearing (3) is movably provided inside the mounting hole (11). A hollow sealing cover (4) is provided at one end of the pulley body (1) near the opening (12). One end of the sealing cover (4) passes through the opening (12) axially through the pulley bearing (3) to the inner circumferential side of the wheel sealing part (2). A rolling limiting component (5) corresponding to the pulley bearing (3) is provided between the sealing cover (4) and the wheel sealing part (2).

2. A split-type pulley according to claim 1, characterized in that, The sealing cover (4) has a cover sealing part (41) at one end, and a cover extension part (42) extending axially at one end of the cover sealing part (41). The sum of the length of the cover extension part (42) and the thickness of the cover sealing part (41) is equal to the sum of the depth of the mounting hole (11) and the thickness of the wheel sealing part (2).

3. A split-type pulley according to claim 2, characterized in that, The wheel sealing part (2) is provided with a circular hole (21) on its inner circumference. The circular hole (21) is connected to the mounting hole (11). The end of the cover extension (42) away from the cover sealing part (41) axially passes through the pulley bearing (3) into the circular hole (21).

4. A split-type pulley according to claim 3, characterized in that, The end face of the cover sealing part (41) away from the cover extension part (42) is flush with the end face of the pulley body (1), and the end face of the cover extension part (42) away from the cover sealing part (41) does not protrude from the end face of the pulley body sealing part (2).

5. A split-type pulley according to claim 2, characterized in that, The inner sides of both ends of the cover extension (42) are respectively provided with arc-shaped parts (43), and there is a horizontal part (44) between the arc-shaped parts (43). The diameter of the cover sealing part (41) is equal to the diameter of the mounting hole (11), and the diameter of the cover extension (42) is equal to the diameter of the circular hole (21).

6. A split-type pulley according to claim 2, 3, 4, or 5, characterized in that, A bearing groove (6) is formed between the cover sealing part (41), the cover extension part (42), the wheel sealing part (2) and the pulley body (1). The pulley bearing (3) is disposed in the bearing groove (6). The inner side of the pulley bearing (3) is in contact with the cover extension part (42), and the outer side of the pulley bearing (3) is in contact with the pulley body (1).

7. A split-type pulley according to claim 6, characterized in that, The pulley bearing (3) has an outer ring portion (31) on its outer circumferential side and an inner ring portion (32) on its inner circumferential side. A plurality of rolling elements (33) are arranged sequentially between the outer ring portion (31) and the inner ring portion (32).

8. A split-type pulley according to claim 7, characterized in that, The outer ring portion (31) abuts against the pulley body (1) on the side away from the inner ring portion (32), and the inner ring portion (32) abuts against the cover extension portion (42) on the side away from the outer ring portion (31).

9. A split-type pulley according to claim 7, characterized in that, The rolling limiting component (5) includes a first limiting boss (51) disposed on the inner side of the end of the cover sealing part (41) near the cover extension part (42), a second limiting boss (52) disposed on the outer side of the end of the wheel sealing part (2) near the pulley body (1), the end of the inner ring part (32) away from the wheel sealing part (2) is in contact with the first limiting boss (51), and the end of the outer ring part (31) away from the cover sealing part (41) is in contact with the second limiting boss (52).

10. A split-type pulley according to claim 1, characterized in that, The pulley body (1) is provided with a roller groove (13) on the outer circumference. The roller groove (13) is provided with roller protrusions (14) at both ends. The bottom of the roller groove (13) is semi-circular. The roller protrusions (14) have an inclined part (15) on the side away from the roller groove (13).

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