Wear-resistant chain wheel with protection device
By designing protective brackets and shaft protective caps on the sprockets, the problem of sprockets accumulating in mud and dust environments is solved, thereby improving wear resistance and transmission efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RENQIU HONGJI GEAR FORGING CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-05
AI Technical Summary
When sprockets are used in muddy and dusty environments, mud and dust tend to accumulate on the teeth, leading to increased friction, reduced transmission efficiency, and accelerated wear.
A wear-resistant sprocket with a protective device is designed, including a protective bracket and a shaft protective cap. The protective bracket blocks mud and sand through the outer and inner protective parts, and the shaft protective cap covers the shaft connection hole to reduce the entry of mud, sand and rainwater, thus protecting the sprocket and shaft.
It effectively reduces the erosion of sprockets and shafts by mud, sand and rainwater, improves transmission efficiency, and extends the service life of sprockets and shafts.
Smart Images
Figure CN224201068U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sprocket technology, specifically a wear-resistant sprocket with a protective device. Background Technology
[0002] Sprockets are components of chain drive systems. They are typically used in conjunction with chains and transmit power through the meshing of their teeth with the chain. Sprockets and chain drive systems are commonly used in agricultural machinery, transportation vehicles, and industrial machinery.
[0003] In many working environments, sprockets are often surrounded by a large amount of impurities such as mud, sand, and dust. For example, during agricultural machinery operations, mud and sand are easily stirred up in farmland. This mud and dust can easily splash onto the sprocket teeth as the sprocket and chain mesh, and gradually accumulate. As the accumulation increases, it significantly increases the friction between the sprocket and chain, leading to reduced transmission efficiency and accelerating the wear of the sprocket teeth and chain. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] This invention provides a wear-resistant sprocket with a protective device, which solves the problems mentioned in the background art.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant sprocket with a protective device, comprising a sprocket body composed of a disc and multiple teeth, wherein a shaft connection hole is formed at the center of the disc, and a protective bracket is also included. The outer circumference of the shaft connection hole is provided with several auxiliary mounting holes formed on the disc. Fasteners for connecting and fixing the sprocket body and the protective bracket are inserted into the auxiliary mounting holes. The protective bracket includes a central portion, and the side of the central portion facing the disc has a number of pads equal to the number of auxiliary mounting holes, with each pad facing the end of the disc. Each part is in contact with the wheel and coaxially aligned with the adjacent auxiliary mounting holes. At least one outer protective part is formed radially at intervals on the outer edge of the central part of the bracket. The protective bracket also includes an inner protective part in an equal number to the outer protective parts. Each outer protective part and an inner protective part are disposed opposite to each other on both sides of the sprocket body. The inner protective part and the outer protective part are respectively formed with a second inclined section and a first inclined section at the ends away from the central part of the bracket. The adjacent ends of the second inclined section and the first inclined section are connected as one unit, and a plurality of through drip holes are formed at the connection between the second inclined section and the first inclined section.
[0008] Preferably, there is a gap between the outer protective part and the inner protective part and the end face of the wheel, the end of the inner protective part away from the second inclined section extends to the root of the tooth, and there is also a gap between the connection between the first inclined section and the second inclined section and the adjacent tooth.
[0009] In a further preferred embodiment, a clearance groove is formed at the center of the central portion of the bracket, and the clearance groove faces the pivot connection hole.
[0010] In a further preferred embodiment, the wear-resistant sprocket with protective device also includes a shaft protective cap, which is also connected and fixed to the sprocket body by fasteners. The shaft protective cap is used to cover the shaft connection hole from the outside. The shaft protective cap includes a flange and a cap, with the cap protruding outward at the center of the flange and a groove with a diameter larger than the diameter of the shaft connection hole formed in the center of the cap. The flange and the sprocket are connected and fixed by fasteners passing through the auxiliary mounting hole.
[0011] (III) Beneficial Effects
[0012] Compared with the prior art, this utility model provides a wear-resistant sprocket with a protective device, which has the following beneficial effects:
[0013] In this invention, the protective bracket, in conjunction with the sprocket body, provides a protective shield at the meshing point of the sprocket body and sprocket when they are in operation. This reduces the amount of mud and sand splashing onto the teeth and also prevents water droplets from falling. Furthermore, the protective cap, in conjunction with the sprocket body, provides a protective shield at the shaft connection hole, reducing the amount of mud and rainwater entering the connection hole and affecting the connection. Attached Figure Description
[0014] Figure 1 This is a structural schematic diagram of a wear-resistant sprocket with a protective device according to the implementation plan;
[0015] Figure 2 for Figure 1 A schematic diagram of the disassembled structure of a wear-resistant sprocket with a protective device.
[0016] Figure 3 This is a structural schematic diagram of the protective support according to the implementation plan.
[0017] In the diagram: 10. Sprocket body; 11. Sprocket disc; 12. Sprocket tooth; 13. Shaft connection hole; 14. Auxiliary mounting hole; 20. Protective bracket; 21. Center of bracket; 22. Clearance groove; 23. Pad; 24. Outer protective part; 25. Inner protective part; 26. First inclined section; 27. Second inclined section; 28. Drip hole; 30. Shaft protective cap; 31. Flange; 32. Cap. Detailed Implementation
[0018] 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.
[0019] Please see Figure 1 and Figure 2 A wear-resistant sprocket with a protective device may include a sprocket body 10, a protective bracket 20, and a shaft protective cap 30. The sprocket body 10 is mainly composed of a disc 11 and multiple teeth 12, and a shaft connection hole 13 is formed at the center of the disc 11 for connecting a shaft for external drive. In addition, several auxiliary mounting holes 14 are provided on the disc 11 around the outer ring of the shaft connection hole 13. Fasteners such as bolts can be inserted into the auxiliary mounting holes 14 for mounting and fixing the protective bracket 20 and the shaft protective cap 30. The protective bracket 20 can provide a certain degree of protection to the sprocket and chain from the outside of the meshing point, and the shaft protective cap 30 can cover the end of the shaft connected to the shaft connection hole 13 from the outside of the sprocket, reducing the entry of mud and rainwater between the shaft connection hole 13 and the shaft, thus affecting their connection and use.
[0020] See Figure 3The protective bracket 20 includes a central portion 21. On the side of the central portion 21 facing the wheel 11, there are an equal number of pads 23 as the number of auxiliary mounting holes 14. The end of each pad 23 facing the wheel 11 contacts the wheel 11 and is coaxially aligned with the adjacent auxiliary mounting hole 14. Fasteners inserted into the auxiliary mounting holes 14 can pass through the pads 23 and be connected and fixed thereto. At least one outer protective portion 24 is formed radially spaced along the outer edge of the central portion 21. As shown in the figure, four outer protective portions 24 are provided and are evenly distributed radially along the central portion 21. The protective bracket 20 also includes an inner protective portion 25, an equal number as the number of outer protective portions 24. Each outer protective portion 24 and one inner protective portion 25 are respectively disposed on the outer and inner sides of the sprocket body 10. The ends of the inner protective portions 25 and outer protective portions 24 away from the central portion 21 are respectively formed with a second inclined segment 27 and a first inclined segment 26. The adjacent ends of the second inclined segment 27 and the first inclined segment 26 are connected as a single unit. Multiple through-holes 28 are formed at the connection between the second inclined section 27 and the first inclined section 26. These sections allow water droplets inside the protective bracket 20 to drip towards the connection point, and the drip holes 28 are used to drain accumulated water droplets. There are gaps between the outer protective part 24 and the inner protective part 25 and the end face of the wheel disc 11. There are also gaps between the connection point of the first inclined section 26 and the second inclined section 27 and the adjacent gear teeth 12 to prevent the protective bracket 20 from interfering with the meshing of the sprocket body 10 and the chain. The end of the inner protective part 25 away from the second inclined section 27 extends to the root of the gear teeth 12. The inner protective part 25 and the outer protective part 24, together with the second inclined section 27 and the first inclined section 26, provide some shielding at the meshing point of the sprocket body 10 and the chain, thereby reducing the splashing of mud and sand onto the gear teeth 12.
[0021] In this embodiment, a clearance groove 22 is formed at the center of the central part 21 of the bracket. The clearance groove 22 faces the shaft connection hole 13, and the diameter of the clearance groove 22 can be slightly larger than the diameter of the shaft connection hole 13, so as to avoid the central part 21 of the bracket from affecting the connection between the shaft and the wheel 11.
[0022] See Figure 2 The shaft protective cap 30 includes a flange 31 and a cap 32. The cap 32 protrudes outward at the center of the flange 31, and a groove with a diameter larger than the diameter of the shaft connection hole 13 is formed in the center of the cap 32. The cap 32 can cover the shaft installed at the shaft connection hole 13 by means of its groove. The flange 31 and the wheel 11 are connected and fixed by fasteners passing through the auxiliary mounting hole 14, so that the shaft protective cap 30 is fixed at the center of the outer side of the protective bracket 20.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A wear-resistant sprocket with a protective device, comprising a sprocket body (10) consisting of a disc (11) and a plurality of teeth (12), wherein a shaft connection hole (13) is formed at the center of the disc (11), characterized in that, It also includes a protective bracket (20), and the outer ring of the shaft connection hole (13) is provided with a number of auxiliary mounting holes (14) opened on the wheel disc (11). Fasteners for connecting and fixing the sprocket body (10) and the protective bracket (20) are inserted into the auxiliary mounting holes (14). The protective bracket (20) includes a central portion (21) of the bracket. On the side of the central portion (21) facing the wheel (11), there are a number of pads (23) equal to the number of auxiliary mounting holes (14). The end of each pad (23) facing the wheel (11) is in contact with the wheel (11) and coaxially aligned with the adjacent auxiliary mounting hole (14). At least one outer protective portion (24) is formed radially spaced along the outer edge of the central portion (21). The protective bracket (20) also includes a number of outer protective portions (24). An equal number of inner protective parts (25) are provided on both sides of the sprocket body (10), and each of the outer protective parts (24) and the inner protective part (25) is disposed opposite to each other. The inner protective part (25) and the outer protective part (24) are respectively formed with a second inclined section (27) and a first inclined section (26) at the ends away from the center part (21) of the bracket. The adjacent ends of the second inclined section (27) and the first inclined section (26) are connected as one unit, and a plurality of through drip holes (28) are formed at the connection between the second inclined section (27) and the first inclined section (26).
2. The wear-resistant sprocket with protective device according to claim 1, characterized in that: There is a gap between the outer protective part (24) and the inner protective part (25) and the end face of the wheel (11), and there is also a gap between the connection between the first inclined section (26) and the second inclined section (27) and the adjacent wheel tooth (12).
3. A wear-resistant sprocket with a protective device according to claim 1 or 2, characterized in that: The inner protective part (25) extends from the end away from the second inclined section (27) to the root of the tooth (12).
4. A wear-resistant sprocket with a protective device according to claim 1, characterized in that: A clearance groove (22) is formed at the center of the central part (21) of the bracket, and the clearance groove (22) faces the shaft connection hole (13).
5. A wear-resistant sprocket with a protective device according to claim 4, characterized in that: It also includes a shaft protective cap (30), which is also connected and fixed to the sprocket body (10) by fasteners, and the shaft protective cap (30) is used to cover the shaft connection hole (13) from the outside.
6. A wear-resistant sprocket with a protective device according to claim 5, characterized in that: The rotating shaft protective cap (30) includes a flange (31) and a cap (32). The cap (32) is formed protruding outward at the center of the flange (31), and a groove with a diameter larger than the diameter of the rotating shaft connection hole (13) is formed in the middle of the cap (32). The flange (31) and the wheel (11) are connected and fixed by fasteners passing through the auxiliary mounting hole (14).