Shaft part nitriding tool
By designing a nitriding fixture driven by a cylinder and a motor, the problems of traditional fixtures being unable to drive parts to rotate and uneven media distribution were solved, achieving uniform and efficient nitriding treatment for shaft parts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIYANG ETERNAL HEAT TREATMENT CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-05-01
AI Technical Summary
Traditional nitriding fixtures for shaft parts have problems such as inability to drive the parts to rotate at low speeds, uneven nitriding, and uneven distribution of nitriding medium during the support and nitriding process, which affect the performance of the parts and the nitriding effect.
A nitriding fixture comprising a first cylinder, a drive motor, a rectangular rod, and a central column was designed. The cylinder drives the opening and closing of the top cover, the motor drives the rotation of the parts, and the liftable support base enables uniform rotation of the parts and flow of the medium during the nitriding process. A mechanical seal is used to prevent medium leakage.
This method achieves uniform contact and uniform nitriding of shaft parts during the nitriding process, improving the uniformity and overall quality of the nitrided layer, and enhancing operational safety and nitriding efficiency.
Smart Images
Figure CN224186239U_ABST
Abstract
Description
Nitrogenation equipment for shaft parts Technical Field
[0001] This utility model relates to the field of auxiliary equipment for mechanical processing, and more specifically, to a nitrogen-processing apparatus for shaft parts. Background Technology
[0002] Nitriding is a chemical heat treatment process that allows nitrogen atoms to penetrate the surface layer of a workpiece at a specific temperature and in a specific medium. As a common surface strengthening process, nitriding can significantly improve the surface hardness, wear resistance, corrosion resistance, and fatigue strength of shaft parts, and is widely used in automotive manufacturing, aerospace, and machinery manufacturing, among other fields. However, in the nitriding process of shaft parts, the performance and design of the tooling play a crucial role in the nitriding effect.
[0003] Traditional nitriding fixtures for shaft parts have several drawbacks. Firstly, existing fixtures typically only provide static support for shaft parts, failing to allow for low-speed rotation within the nitriding furnace. This often hinders adequate nitriding, leading to uneven contact between different parts and the nitriding medium, as well as uneven heating and inconsistent nitriding layer thickness, thus affecting the overall performance of the part. For example, some fixtures use simple mesh cylinders to support parts; during nitriding, the shaft part may remain in the same location within the furnace, where temperature and nitriding medium levels are uneven, significantly reducing the nitriding effect. Secondly, the structural design of traditional fixtures, such as solid cylinders, is not conducive to the uniform distribution of the nitriding medium within the furnace, failing to fully utilize the furnace's efficiency. Therefore, we propose a new nitriding fixture for shaft parts. Summary of the Invention
[0004] The purpose of this utility model is to provide a nitrogen-processing device for shaft parts to solve the defects mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A nitriding apparatus for shaft parts includes a nitriding furnace body. A first cylinder is provided on one side of the nitriding furnace body. A top cover is provided on the top of the nitriding furnace body. A fixing plate is fixedly installed on the side plate of the top cover. The end of the telescopic shaft of the first cylinder is detachably installed on the fixing plate. A drive motor is fixedly installed at the center of the top surface of the top cover. A vertically arranged rectangular rod is fixedly installed at the end of the output shaft of the drive motor. A second cylinder is provided at the bottom of the nitriding furnace body. The telescopic shaft of the second cylinder passes through the nitriding furnace body and is detachably installed on a support base. A protruding post is rotatably connected at the center of the support base. A mesh cylinder is fixedly installed at the top of the protruding post. A vertically arranged central column is fixedly installed at the center of the mesh cylinder. A rectangular insertion hole is provided in the central column along the height direction of the central column. The rectangular rod is inserted into the rectangular insertion hole.
[0007] Preferably, both the rectangular rod and the rectangular socket have rectangular cross-sections, and the dimensions of the rectangular rod are adapted to the dimensions of the rectangular socket.
[0008] Preferably, the bottom of the nitriding furnace body is fixedly equipped with multiple support legs, and the height of the support legs is greater than the height of the second cylinder.
[0009] Preferably, a mechanical seal is fitted onto the telescopic shaft of the second cylinder, and the mechanical seal is fixedly installed on the bottom surface of the nitriding furnace body.
[0010] Preferably, a support plate is fixedly installed at the end of the telescopic shaft of the second cylinder, and the support base is fixedly installed on the upper surface of the support plate by a plurality of fastening bolts.
[0011] Preferably, a plurality of support plates are fixedly installed between the annular side of the central column and the mesh cylinder, and the bottom end of the support plate is fixedly installed on the bottom wall of the mesh cylinder.
[0012] Preferably, a sealing ring is fixedly installed on the top cylinder of the nitriding furnace body. The sealing ring is annular, and the lower projection of the top cover coincides with the lower projection of the sealing ring.
[0013] Preferably, a fixed plate is fixedly installed at the end of the telescopic shaft of the first cylinder, the fixed plate is fixedly installed on the bottom surface of the fixed plate, a guide plate is fixedly installed on the side cylinder of the nitriding furnace body, and a vertically arranged guide rod is fixedly installed on the bottom surface of the fixed plate, the guide rod passes through the guide plate and is slidably connected to the guide plate.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. This utility model achieves convenient and stable opening and closing of the top cover by setting up a first cylinder, a fixed plate, a guide rod and the guide plate working together, as well as the connection between the first cylinder and the top cover. This facilitates the clamping of shaft parts into the nitriding furnace body, while ensuring a smooth opening and closing process of the top cover and improving operational safety.
[0016] 2. This utility model utilizes the insertion and cooperation of a drive motor, a rectangular rod and a rectangular insertion hole in the central column, as well as the structural design of a support base, a protruding column and a mesh tube. The mesh tube facilitates the normal flow of the nitriding medium, enabling the shaft parts to rotate at a uniform speed during the nitriding process. This achieves the effect of ensuring that all parts of the shaft parts are in uniform contact with the nitriding medium, improving the uniformity of the nitriding layer and the overall nitriding quality of the parts.
[0017] 3. This utility model utilizes the connection between the second cylinder, the support plate and the support base, as well as the mechanical seal, to realize the function of lifting and lowering the support base, while ensuring the sealing of the bottom of the nitriding furnace body. This achieves the effect of facilitating the adjustment of the position of shaft parts in the furnace, adapting to different process requirements, preventing leakage of nitriding medium, and ensuring the stable progress of the nitriding process. Attached Figure Description
[0018] Figure 1 is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 is one of the exploded structural diagrams of this utility model;
[0020] Figure 3 is the second schematic diagram of the exploded structure of this utility model;
[0021] Figure 4 is a partial structural schematic diagram of this utility model;
[0022] The meanings of the labels in the diagram are as follows:
[0023] 1. Nitriding furnace body; 10. Support legs; 11. Sealing ring; 12. Guide plate;
[0024] 2. First cylinder; 20. Fixed plate; 21. Fixed plate; 22. Guide rod; 23. Top cover; 24. Drive motor; 25. Rectangular rod;
[0025] 3. Second cylinder; 30. Mechanical seal; 31. Support plate; 32. Support base; 33. Protruding column; 34. Mesh cylinder; 35. Center column; 351. Rectangular insertion hole; 36. Support plate. Detailed Implementation
[0026] 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.
[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 are not intended to indicate or imply that the device or component 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.
[0028] Please refer to Figures 1-4. This utility model provides a technical solution: a nitriding apparatus for shaft parts, including a nitriding furnace body 1, a first cylinder 2 on one side of the nitriding furnace body 1, a top cover 23 on the top of the nitriding furnace body 1, a fixing plate 21 fixedly installed on the side plate of the top cover 23, the end of the telescopic shaft of the first cylinder 2 being detachably installed on the fixing plate 21, and a fixing disk 20 fixedly installed on the end of the telescopic shaft of the first cylinder 2, the fixing disk 20 being fixedly installed on the bottom surface of the fixing plate 21, so that the top cover 23 can be conveniently opened and closed under the drive of the first cylinder 2, which greatly facilitates the loading and unloading of shaft parts and improves the working efficiency of nitriding treatment;
[0029] Specifically, a drive motor 24 is fixedly installed at the center of the top surface of the top cover 23. A vertically oriented rectangular rod 25 is fixedly installed at the end of the output shaft of the drive motor 24. A second cylinder 3 is provided at the bottom of the nitriding furnace body 1. The telescopic shaft of the second cylinder 3 passes through the nitriding furnace body 1 and is detachably installed with a support base 32. A protruding post 33 is rotatably connected at the center of the support base 32. A mesh cylinder 34 is fixedly installed at the top of the protruding post 33. A vertically oriented rectangular rod 25 is fixedly installed at the center of the mesh cylinder 34. A central column 35 is provided, and a rectangular insertion hole 351 is provided inside the central column 35 along the height direction of the central column 35. A rectangular rod 25 is inserted into the rectangular insertion hole 351. The cross-sections of the rectangular rod 25 and the rectangular insertion hole 351 are both rectangular. The size of the rectangular rod 25 is adapted to the size of the rectangular insertion hole 351. As the shaft-like parts are placed in the mesh cylinder 34, the mesh cylinder 34 can be rotated uniformly, ensuring that all parts of the parts are in full and uniform contact with the nitriding medium, thereby improving the uniformity and quality of the nitriding layer.
[0030] In this embodiment, the support base 32 can be raised and lowered under the action of the second cylinder 3. This design can flexibly adjust the height position of shaft parts in the nitriding furnace body 1 to meet different nitriding process requirements.
[0031] Specifically, the bottom of the nitriding furnace body 1 is fixedly equipped with multiple support legs 10. The height of the support legs 10 is greater than the height of the second cylinder 3, so that the nitriding furnace body 1 can be stably placed on the working site. At the same time, it provides sufficient space for the installation and operation of the second cylinder 3 and related components, ensuring the overall stability of the equipment.
[0032] Furthermore, a mechanical seal 30 is fitted onto the telescopic shaft of the second cylinder 3. The mechanical seal 30 is fixedly installed on the bottom surface of the nitriding furnace body 1. A mechanical seal 30 is also installed at the transmission connection between the drive motor 24 and the top cover 23. This effectively prevents the leakage of the nitriding medium inside the nitriding furnace body 1, ensures the stability of the furnace environment during the nitriding process, and helps to improve the nitriding effect.
[0033] In addition, a support plate 31 is fixedly installed at the end of the telescopic shaft of the second cylinder 3, and the support base 32 is fixedly installed on the upper surface of the support plate 31 by multiple fastening bolts, making the connection between the support base 32 and the second cylinder 3 more stable, and ensuring that the placement platform of shaft parts is stable and reliable during the lifting and lowering process of the support base 32.
[0034] It is worth noting that multiple support plates 36 are fixedly installed between the annular side of the central column 35 and the mesh cylinder 34. The bottom end of the support plate 36 is fixedly installed on the bottom wall of the mesh cylinder 34, which enhances the connection strength between the central column 35 and the mesh cylinder 34, making the entire structure more stable during rotation and ensuring the smooth rotation of shaft parts during the nitriding process.
[0035] It is worth noting that a sealing ring 11 is fixedly installed on the top cylinder of the nitriding furnace body 1. The sealing ring 11 is annular, and the lower projection of the top cover 23 coincides with the lower projection of the sealing ring 11, which ensures good sealing between the top cover 23 and the nitriding furnace body 1 when the top cover 23 is closed, prevents leakage of nitriding medium, maintains the stability of the nitriding environment in the furnace, and plays an important role in improving the nitriding quality.
[0036] In this embodiment, a guide plate 12 is fixedly installed on the side cylinder of the nitriding furnace body 1, and a vertically arranged guide rod 22 is fixedly installed on the bottom surface of the fixed plate 21. The guide rod 22 passes through the guide plate 12 and is slidably connected to the guide plate 12, so that the top cover 23 is more stable during opening and closing, avoiding shaking and displacement, and improving the safety and reliability of operation.
[0037] Finally, it should be noted that the first cylinder 2, the second cylinder 3, and the drive motor 24 of this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching controller and power supply, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.
[0038] When using the nitriding apparatus for shaft parts of this utility model, firstly, according to the nitriding process requirements of the shaft parts, operate the second cylinder 3 to make its telescopic shaft drive the support plate 31 and the support base 32 connected thereto to rise and fall, and adjust the support base 32 to a suitable height to provide a suitable placement position for the shaft parts in the nitriding furnace body 1.
[0039] Then, the first cylinder 2 is started, and its telescopic shaft pushes the fixed plate 20 and the fixed plate 21, causing the top cover 23 to rise and open the nitriding furnace body 1. The shaft parts are then placed in the mesh cylinder 34. After the parts are placed, the first cylinder 2 is started again, causing the top cover 23 to fall and close. At this time, the rectangular rod 25 is inserted into the rectangular insertion hole 351. Subsequently, the drive motor 24 is started, and its output shaft drives the rectangular rod 25 to rotate. Since the rectangular rod 25 is matched with the rectangular insertion hole 351 in the central column 35, it drives the mesh cylinder 34 to rotate at a uniform speed, cooperating with the nitriding furnace body 1 to ensure that all parts of the shaft parts in the nitriding furnace body 1 are in uniform contact with the nitriding medium.
[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A shaft part nitriding tooling, comprising a nitriding furnace main body (1), characterized in that: A first cylinder (2) is provided on one side of the nitriding furnace body (1). A top cover (23) is provided on the top of the nitriding furnace body (1). A fixing plate (21) is fixedly installed on the side plate of the top cover (23). The end of the telescopic shaft of the first cylinder (2) is detachably installed on the fixing plate (21). A drive motor (24) is fixedly installed at the center of the top surface of the top cover (23). A vertically arranged rectangular rod (25) is fixedly installed at the end of the output shaft of the drive motor (24). A second cylinder (3) is provided at the bottom of the nitriding furnace body (1). The telescopic shaft of the second cylinder (3) passes through the nitriding furnace body (1) and is detachably mounted with a support base (32). A protruding column (33) is rotatably connected at the center of the support base (32). A mesh cylinder (34) is fixedly mounted at the top of the protruding column (33). A vertically arranged central column (35) is fixedly mounted at the center of the mesh cylinder (34). A rectangular insertion hole (351) is provided inside the central column (35) along the height direction of the central column (35). The rectangular rod (25) is inserted into the rectangular insertion hole (351).
2. The nitriding apparatus for shaft parts according to claim 1, characterized in that: The rectangular rod (25) and the rectangular socket (351) both have rectangular cross sections, and the dimensions of the rectangular rod (25) are adapted to the dimensions of the rectangular socket (351).
3. The nitriding apparatus for shaft parts according to claim 1, characterized in that: The bottom of the nitriding furnace body (1) is fixedly equipped with multiple support legs (10), and the height of the support legs (10) is greater than the height of the second cylinder (3).
4. The nitriding apparatus for shaft parts according to claim 3, characterized in that: A mechanical seal (30) is fitted on the telescopic shaft of the second cylinder (3), and the mechanical seal (30) is fixedly installed on the bottom surface of the nitriding furnace body (1).
5. The nitriding apparatus for shaft parts according to claim 1, characterized in that: The end of the telescopic shaft of the second cylinder (3) is fixedly mounted with a support plate (31), and the support base (32) is fixedly mounted on the upper surface of the support plate (31) by a plurality of fastening bolts.
6. The shaft part nitriding tooling according to claim 1, characterized in that: Multiple support plates (36) are fixedly installed between the annular side of the central column (35) and the mesh cylinder (34), and the bottom end of the support plate (36) is fixedly installed on the bottom wall of the mesh cylinder (34).
7. The nitriding apparatus for shaft parts according to claim 1, characterized in that: A sealing ring (11) is fixedly installed on the top cylinder of the nitriding furnace body (1). The sealing ring (11) is annular, and the lower projection of the top cover (23) coincides with the lower projection of the sealing ring (11).
8. The nitriding apparatus for shaft parts according to claim 1, characterized in that: A fixed plate (20) is fixedly installed at the end of the telescopic shaft of the first cylinder (2). The fixed plate (20) is fixedly installed on the bottom surface of the fixed plate (21). A guide plate (12) is fixedly installed on the side cylinder of the nitriding furnace body (1). A guide rod (22) is fixedly installed on the bottom surface of the fixed plate (21) in a vertical position. The guide rod (22) passes through the guide plate (12) and is slidably connected to the guide plate (12).