Wear-resistant powder metallurgy gear

Abstract

The utility model discloses a wear-resistant powder metallurgy gear, which belongs to the technical field of metallurgy gears and is characterized in that a center hole is arranged at the center of a gear body, teeth are arranged on the outer side of the gear body, a wear-resistant sleeve is fixedly mounted on the surfaces of the teeth, a positioning block is arranged on the inner side surface of the wear-resistant sleeve, and a positioning groove is clamped on the surface of the positioning block. The wear-resistant powder metallurgy gear comprises a wear-resistant sleeve, a positioning block is arranged in the wear-resistant sleeve, a positioning groove is formed in the wear-resistant sleeve, a connecting hole communicates with the inner wall of the positioning groove, a positioning rod is movably connected to the inner wall of the connecting hole in a sleeving mode, and a fixing hole is connected to one end of the positioning rod through threads. The assembly firmness and the use stability of the wear-resistant sleeve are greatly improved, the weight reduction groove has the weight reduction function and can store lubricating oil through the arranged weight reduction groove, the arranged oil nipple and the arranged sealing cover, weight reduction and oil storage are combined, and the gear production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical gear technology, and more specifically, to a wear-resistant powder metallurgy gear. Background Technology

[0002] With the continuous development of industrial technology, powder metallurgy gears are being used more and more widely, especially in the fields of automobiles, motorcycles, agricultural machinery, mining, petrochemicals, and new energy. However, the wear-resistant components set in the production process of commonly used wear-resistant powder metallurgy gears are not easy to be quickly positioned, and are prone to axial movement due to external forces, which increases the difficulty of production.

[0003] For example, CN221704357U discloses a wear-resistant powder metallurgy gear, which specifically includes a gear body, a metallurgical gear core, metallurgical gear outer teeth, and a wear-resistant sleeve. The metallurgical gear core is disposed within the gear body, and a bearing hole is provided on the gear body. The bearing hole is located in the middle of the front side of the gear body. A connecting groove is provided at the connection between the metallurgical gear outer teeth and the gear body. The connecting groove is fixed to a connecting boss on the gear body. The wear-resistant sleeve fits against the metallurgical gear outer teeth. A rotating ring is disposed within the metallurgical gear core, and a core reinforcing rib is provided between the rotating ring and the metallurgical gear core. A concentric annular oil groove is provided on the end face of the gear body, and multiple weight-reducing holes are arranged in an array around the bearing hole on the gear body.

[0004] As can be seen from the above-mentioned disclosed scheme, the wear-resistant sleeve is set on the outside of the metallurgical gear without axial limiting. During the assembly and production process, it is not only difficult to position, but also easy for the wear-resistant sleeve to move axially due to external forces during use, which reduces the stability of use. In addition, the gear surface is provided with weight reduction holes and concentric annular oil grooves, which are processed separately. During the processing, it is necessary to prevent the oil passage from being perforated, which increases the difficulty of production and reduces production efficiency. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a wear-resistant powder metallurgy gear. This wear-resistant powder metallurgy gear, through the setting of positioning blocks, positioning grooves and positioning rods, can quickly position and fasten the wear-resistant sleeve, greatly improving the assembly firmness and usage stability of the wear-resistant sleeve. Furthermore, through the setting of weight-reducing grooves, oil nozzles and sealing caps, the weight-reducing grooves not only have the function of weight reduction, but can also store lubricating oil, combining weight reduction and oil storage into one, thereby improving the production efficiency of the gear.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A wear-resistant powder metallurgy gear includes a gear body with a central hole at its center and teeth on its outer side. A wear-resistant sleeve is fixedly mounted on the surface of the teeth. A positioning block is provided on the inner surface of the wear-resistant sleeve, and a positioning groove is engaged on the surface of the positioning block. A connecting hole is connected to the inner wall of the positioning groove, and a positioning rod is movably fitted onto the inner wall of the connecting hole. One end of the positioning rod is threadedly connected to a fixing hole. A weight-reducing groove is provided on the surface of the gear body, and an oil filler is provided on the back of the gear body, with one end of the oil filler communicating with the interior of the weight-reducing groove. A sealing cap is threadedly connected to the inner wall of the weight-reducing groove. This wear-resistant powder metallurgy gear, through the positioning block, positioning groove, and positioning rod, can quickly position and secure the wear-resistant sleeve, greatly improving the assembly firmness and operational stability of the wear-resistant sleeve. Furthermore, the weight-reducing groove, oil filler, and sealing cap allow the weight-reducing groove to not only reduce weight but also store lubricating oil, combining weight reduction and oil storage into one, thus improving gear production efficiency.

[0008] Furthermore, the sealing cap has a hole in the middle that communicates with the central hole, and the outer surface of the sealing cap has an anti-slip part. The anti-slip part is polygonal in shape, and the side of the sealing cap has an external thread. The anti-slip part makes it easy for the user to rotate the sealing cap with a wrench.

[0009] Furthermore, the inner wall of the weight-reducing groove is provided with an internal thread that matches the external thread of the sealing cover, and the inner surface of the sealing cover is provided with a first sealing gasket and a second sealing gasket. Both the first sealing gasket and the second sealing gasket are made of oil-resistant sealing rubber. The first sealing gasket and the second sealing gasket are used to seal the inner and outer sides of the sealing cover.

[0010] Furthermore, the inner wall of the fixing hole is connected to an oiling hole, and a connecting hole is provided at the center of the positioning rod. The connecting hole is connected to the oiling hole, so that the lubricating oil in the weight reduction groove can be added to the gear meshing part through the oiling hole.

[0011] Furthermore, one end of the positioning rod is provided with a polygonal nut, and the inner wall of the weight-reducing groove is provided with a countersunk groove coaxial with the connecting hole. The polygonal nut is located in the countersunk groove to prevent the nut from protruding from the inner wall of the weight-reducing groove, thus facilitating the entry of lubricating oil into the connecting hole.

[0012] Furthermore, the inner wall of the weight-reducing groove is provided with reinforcing plates, which are distributed in a ring at equal intervals to increase the strength of the gear.

[0013] Furthermore, one end of the connecting hole is connected to the weight-reducing groove, which facilitates the installation of the positioning rod through the weight-reducing groove.

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

[0015] This solution, through the use of positioning blocks, positioning slots, and positioning rods, can quickly position and secure the wear-resistant sleeve, greatly improving the assembly firmness and operational stability of the wear-resistant sleeve.

[0016] This solution, through the design of a weight-reducing groove, an oil filler, and a sealing cap, enables the weight-reducing groove to not only reduce weight but also store lubricating oil, combining weight reduction and oil storage into one, thereby improving gear production efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of this utility model;

[0018] Figure 2 for Figure 1 A three-dimensional view of the gear body and wear-resistant sleeve installation structure;

[0019] Figure 3 for Figure 2 A three-dimensional view of the wear-resistant sleeve structure;

[0020] Figure 4 for Figure 2 A three-dimensional view of the gear body structure;

[0021] Figure 5 for Figure 1 A three-dimensional diagram of the sealing cap structure.

[0022] Explanation of the labels in the diagram:

[0023] 1. Gear body, 11. Tooth, 12. Center hole, 13. Weight reduction groove, 14. Oil nozzle, 15. Reinforcing plate, 16. Positioning groove, 17. Connecting hole, 2. Wear-resistant sleeve, 21. Positioning block, 22. Fixing hole, 23. Oiling hole, 3. Sealing cover, 31. Anti-slip part, 32. First sealing gasket, 33. Second sealing gasket, 4. Positioning rod, 41. Connecting hole. Detailed Implementation

[0024] 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. Example 1

[0025] Please see Figure 1-5A wear-resistant powder metallurgy gear includes a gear body 1, which is a powder metallurgy gear, and its structure and manufacturing method are existing technologies. A central hole 12 is provided at the center of the gear body 1. Teeth 11 are provided on the outer side of the gear body 1. A wear-resistant sleeve 2 is fixedly installed on the surface of the teeth 11. The wear-resistant sleeve 2 is existing technology and can increase the wear resistance of the gear. A positioning block 21 is provided on the inner surface of the wear-resistant sleeve 2. The positioning block 21 can limit the installation position of the wear-resistant sleeve 2 and prevent rotation and axial movement of the wear-resistant sleeve 2. A positioning groove 16 is engaged on the surface of the positioning block 21. The inner wall of the gear body 1 is connected to a connecting hole 17. One end of the connecting hole 17 is connected to the weight reduction groove 13, which facilitates the installation of the positioning rod 4 through the weight reduction groove 13. The positioning rod 4 is movably sleeved on the inner wall of the connecting hole 17. One end of the positioning rod 4 is connected to a fixing hole 22 by a thread. The surface of the gear body 1 is provided with a weight reduction groove 13. The inner wall of the weight reduction groove 13 is provided with a reinforcing plate 15. The reinforcing plate 15 is distributed in a ring at equal intervals, which can increase the strength of the gear. The back of the gear body 1 is provided with a filler nozzle 14, and one end of the filler nozzle 14 is connected to the inside of the weight reduction groove 13. The inner wall of the weight reduction groove 13 is connected to a sealing cap 3 by a thread.

[0026] The sealing cover 3 has a hole in the middle that communicates with the central hole 12. The outer surface of the sealing cover 3 is provided with an anti-slip part 31, which is polygonal in shape. The side of the sealing cover 3 is provided with an external thread. The anti-slip part 31 makes it easy for the user to rotate the sealing cover 3 with a wrench. The inner wall of the weight reduction groove 13 is provided with an internal thread that matches the external thread of the sealing cover 3. The inner surface of the sealing cover 3 is provided with a first sealing gasket 32 ​​and a second sealing gasket 33. Both the first sealing gasket 32 ​​and the second sealing gasket 33 are made of oil-resistant sealing rubber. The first sealing gasket 32 ​​and the second sealing gasket 33 are used to seal the inner and outer sides of the sealing cover 3.

[0027] The inner wall of the fixing hole 22 is connected to the oil filling hole 23. The center of the positioning rod 4 is provided with a connecting hole 41, which is connected to the oil filling hole 23. This allows the lubricating oil in the weight reduction groove 13 to be added to the gear meshing point through the oil filling hole 23. One end of the positioning rod 4 is provided with a polygonal nut. The inner wall of the weight reduction groove 13 is provided with a countersunk groove coaxial with the connecting hole 17. The polygonal nut is located in the countersunk groove to prevent the nut from protruding from the inner wall of the weight reduction groove 13, thus facilitating the entry of lubricating oil into the connecting hole 41.

[0028] During assembly, the wear-resistant powder metallurgy gear can have its wear-resistant sleeve 2 installed on the outside of the gear body 1, allowing the positioning block 21 to snap into the positioning groove 16. At this point, the connecting hole 17 and the fixing hole 22 are coaxial and are tightened by rotating the positioning rod 4 clockwise. The connecting hole 41 and the oil filling hole 23 are connected. During gear use, the lubricating oil in the weight reduction groove 13 enters the connecting hole 41 and is added to the gear meshing surface through the oil filling hole 23 for lubrication. Through the positioning block 21, positioning groove 16, and positioning rod 4, the wear-resistant sleeve 2 can be quickly positioned and tightened, greatly improving the assembly firmness and usage stability of the wear-resistant sleeve 2. Furthermore, through the weight reduction groove 13, oil filling nozzle 14, and sealing cap 3, the weight reduction groove 13 not only has the function of weight reduction but also stores lubricating oil, combining weight reduction and oil storage into one, thus improving the gear production efficiency.

[0029] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A wear-resistant powder metallurgy gear comprising a gear body (1), a center hole (12) is arranged at the center position of the gear body (1), and a tooth (11) is arranged at the outer side of the gear body (1), characterized in that: The surface of the tooth (11) is fixedly provided with a wear-resistant sleeve (2), the inner surface of the wear-resistant sleeve (2) is provided with a positioning block (21), the surface of the positioning block (21) is clamped with a positioning groove (16), the inner wall of the positioning groove (16) is communicated with a connecting hole (17), the inner wall of the connecting hole (17) is movably sleeved with a positioning rod (4), one end of the positioning rod (4) is threadedly connected with a fixing hole (22), the surface of the gear body (1) is provided with a lightening groove (13), the back surface of the gear body (1) is provided with an oil filler (14), and one end of the oil filler (14) is communicated with the inside of the lightening groove (13), and the inner wall of the lightening groove (13) is threadedly connected with a sealing cover (3).

2. A wear resistant powder metallurgy gear according to claim 1, characterized in that: The middle position of the sealing cover (3) is provided with a hole communicating with the center hole (12), the outer surface of the sealing cover (3) is provided with an anti-skid part (31), the shape of the anti-skid part (31) is polygonal, and the side of the sealing cover (3) is provided with an external thread.

3. A wear resistant powder metallurgy gear according to claim 2, characterized in that: The inner wall of the lightening groove (13) is provided with an internal thread matched with the external thread of the sealing cover (3), the inner surface of the sealing cover (3) is provided with a first sealing gasket (32) and a second sealing gasket (33), and the first sealing gasket (32) and the second sealing gasket (33) are made of oil-resistant sealing rubber.

4. A wear resistant powder metallurgy gear according to claim 1, characterized in that: The inner wall of the fixing hole (22) is communicated with an oil filler hole (23), the center position of the positioning rod (4) is provided with a communicating hole (41), and the communicating hole (41) is communicated with the oil filler hole (23).

5. A wear resistant powder metallurgy gear according to claim 1, characterized in that: One end of the positioning rod (4) is provided with a polygonal nut, the inner wall of the lightening groove (13) is provided with a countersunk groove coaxial with the connecting hole (17), and the polygonal nut is in the countersunk groove.

6. A wear resistant powder metallurgy gear according to claim 1, characterized in that: The inner wall of the lightening groove (13) is provided with a reinforcing plate (15), and the reinforcing plate (15) is annularly and equally spaced.

7. A wear resistant powder metallurgy gear according to claim 1, characterized in that: One end of the connecting hole (17) is communicated with the lightening groove (13).

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