Precise gear heat treatment device
By using a three-dimensional heating design and a conical mounting structure, the problem of uneven heating in gear heat treatment is solved, achieving uniform heating and reducing thermal stress, thereby improving the dimensional accuracy and mechanical properties of the gear.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-03
AI Technical Summary
Uneven heating during gear heat treatment leads to inconsistent internal structural transformation, generating complex thermal and structural stresses that affect the gear's dimensional accuracy, mechanical properties, and service life.
It adopts a three-dimensional heating design, uses an asbestos insulation pad and a heat-conducting opening design, combined with a conical placement seat and a limiting block structure, to ensure uniform heating of the gears and prevent hot air leakage.
This achieves uniform heating of the gears, reduces thermal stress, improves dimensional accuracy and mechanical properties, and extends service life.
Smart Images
Figure CN224077486U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gear processing technology, and in particular to a precision gear heat treatment device. Background Technology
[0002] Gears are mechanical transmission components that transmit power, change speed and direction of rotation through the meshing of teeth. They are widely used in machinery, automobiles, aerospace, watchmaking and other fields. Gear machining is the process of manufacturing gear teeth using machining methods. Its purpose is to enable gears to achieve accurate transmission, power transmission and motion control by precisely machining parameters such as tooth profile, tooth direction and tooth pitch.
[0003] In the existing technology, gears need to be heat-treated during the gear manufacturing process to improve their performance. However, if the gear is heated unevenly during heat treatment, the internal structure of the gear will not transform in a consistent manner, resulting in complex thermal and structural stresses, which will significantly affect the dimensional accuracy, mechanical properties and service life of the gear. Summary of the Invention
[0004] The purpose of this invention is to solve the problem in the prior art that in the gear processing process, heat treatment is required to improve the performance of the gear. However, if the gear is heated unevenly during heat treatment, the internal structure of the gear will not transform in a consistent manner, resulting in complex thermal stress and structural stress, which will significantly affect the dimensional accuracy, mechanical properties and service life of the gear. Therefore, a precision gear heat treatment device is proposed.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A precision gear heat treatment device includes a heating chamber. The inner wall of the heating chamber is provided with an asbestos heat insulation pad. The inner wall of the heating chamber is provided with a first heating tube. The bottom of the heating chamber is provided with a second heating tube. The top of the heating chamber has an opening. An end cap is inserted into the inner wall of the heating chamber at the opening. Two connecting plates are fixedly connected to the bottom of the end cap. Multiple placement plates are fixedly connected to the corresponding sides of the two connecting plates. Multiple placement seats are fixedly connected to the upper surfaces of the multiple placement plates. The placement seats are configured as conical columns.
[0007] Preferably, a connecting seat is fixedly connected to the top of the end cap, and a pull ring is fixedly connected to the top of the connecting seat. A rectangular groove is formed on the inner wall of the pull ring.
[0008] Preferably, the inner wall of the connecting plate at the intervals between the multiple placement plates has multiple heat-conducting openings.
[0009] Preferably, the inner wall of the end cap has a cavity, and the end cap is slidably mounted on the inner wall of the cavity. A limit block is fixedly connected to the side wall of the slide plate, and a limit slot is provided on the inner wall of the heating box. The limit block is inserted into the inner wall of the limit slot.
[0010] Preferably, the end cap is fixedly connected to a metal elastic strip on the inner wall of the cavity, and the end of the metal elastic strip is fixedly connected to the side of the slide plate away from the limiting block.
[0011] Preferably, a steel wire rope is fixedly connected to the side wall of the skateboard. The end of the steel wire rope away from the skateboard extends into the inside of the pull ring and is fixedly connected to a connecting frame. The sliding arrangement of the connecting frame is located on the inner wall of the rectangular groove where the pull ring is located. An arc-shaped stop bar is fixedly connected to the top of the connecting frame.
[0012] Compared with the prior art, the present invention provides a precision gear heat treatment device, which has the following beneficial effects:
[0013] 1. This precision gear heat treatment device uses a first heating tube to cover the side of the gear and a second heating tube to radiate heat to the bottom of the gear, avoiding the temperature difference between the upper and lower surfaces caused by traditional single-sided heating. This allows for stable and uniform heating of precision gears. The asbestos insulation pad reduces heat dissipation from the housing, improving the temperature uniformity inside the housing. The heat conduction openings on the connecting plate are located at the intervals between the placement plates, allowing hot air to flow between multiple gears and avoiding localized poor heat dissipation caused by adjacent gears blocking each other.
[0014] 2. The precision gear heat treatment device uses a conical column design for the placement seat, with its tip supporting the gear's inner hole. This single-point support avoids uneven heat conduction caused by traditional planar contact. Furthermore, the conical column design of the placement seat with its inclined sidewalls prevents the formation of a low-temperature zone at the point of complete contact between the gear's inner hole and the placement seat due to rapid heat dissipation. At the same time, when the gear's inner hole contacts the placement seat, it automatically centers under gravity, ensuring that the gear axis is perpendicular.
[0015] 3. This precision gear heat treatment device achieves sealing by using a limit block on the end cover to cooperate with the limit slot of the heating chamber. The metal elastic strip provides continuous elasticity to ensure that the limit block and the slot fit tightly together, preventing hot air leakage from the chamber during heating.
[0016] 4. When the end cover needs to be lifted by pulling the pull ring, the traction hook extends to the gap between the connecting frame and the arc-shaped stop bar. When the traction hook rises, it can pull the arc-shaped stop bar and the connecting frame to rise, causing the steel wire rope to move. This can cause the metal elastic strip to bend and compress, causing the limit block to retract into the cavity. The end cover can be removed so that it can be lifted stably. Attached Figure Description
[0017] Figure 1This is a schematic diagram of the structure of a precision gear heat treatment device proposed in this utility model.
[0018] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle section.
[0019] Figure 3 for Figure 2 Three-dimensional view of the middle limiting insert block.
[0020] In the diagram: 1 Heating box, 2 Asbestos insulation pad, 3 First heating tube, 4 Second heating tube, 5 End cap, 6 Connecting plate, 7 Placement plate, 8 Placement seat, 9 Connecting seat, 10 Pull ring, 11 Slide plate, 12 Limiting block, 13 Metal elastic strip, 14 Steel wire rope, 15 Connecting frame, 16 Arc-shaped stop bar. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0022] Reference Figure 1-3 A precision gear heat treatment device includes a heating chamber 1, an asbestos heat insulation pad 2 on the inner wall of the heating chamber 1, a first heating tube 3 on the inner wall of the heating chamber 1, a second heating tube 4 at the bottom of the heating chamber 1, an opening at the top of the heating chamber 1, an end cap 5 inserted into the inner wall of the heating chamber 1 at the opening, two connecting plates 6 fixedly connected to the bottom of the end cap 5, multiple placement plates 7 fixedly connected to the corresponding side of the two connecting plates 6, and multiple placement seats 8 fixedly connected to the upper surface of the multiple placement plates 7, the placement seats 8 being configured as conical columns.
[0023] The top of the end cap 5 is fixedly connected to a connecting seat 9, and the top of the connecting seat 9 is fixedly connected to a pull ring 10. The inner wall of the pull ring 10 is provided with a rectangular groove, and the inner wall of the connecting plate 6 located at the interval of the multiple placement plates 7 is provided with multiple heat conduction openings.
[0024] The inner wall of the end cap 5 has a cavity, and a slide plate 11 is slidably mounted on the inner wall of the cavity. A limit block 12 is fixedly connected to the side wall of the slide plate 11. A limit slot is opened on the inner wall of the heating box 1. The limit block 12 is inserted into the inner wall of the limit slot. A metal elastic strip 13 is fixedly connected to the inner wall of the cavity of the end cap 5. The end of the metal elastic strip 13 is fixedly connected to the side of the slide plate 11 away from the limit block 12.
[0025] In use, the first heating tube 3 on the inner wall of the heating box 1 is arranged in a ring shape, and together with the second heating tube 4 at the bottom, a three-dimensional heating field is formed at the top, side wall and bottom. The first heating tube 1 covers the side of the gear, and the second heating tube 3 radiates heat to the bottom of the gear, avoiding the temperature difference between the upper and lower surfaces caused by traditional single-sided heating. This allows for stable and uniform heating of precision gears. The asbestos heat insulation pad 2 reduces heat dissipation from the box and improves the temperature uniformity inside the box. The heat conduction opening on the connecting plate 6 is located at the interval of the placement plate 7, allowing hot air to flow between the multiple layers of gears and avoiding local heat dissipation problems caused by adjacent gears blocking each other.
[0026] The placement seat 8 is designed as a conical column, with its tip supporting the gear's inner hole. This single-point support avoids uneven heat conduction caused by traditional planar contact. Furthermore, the conical column design of the placement seat 8 with its inclined sidewalls prevents the formation of a low-temperature zone at the point of complete contact between the gear's inner hole and the placement seat 8 due to rapid heat dissipation. Additionally, when the gear's inner hole contacts the placement seat 8, it automatically centers under gravity, ensuring that the gear axis is perpendicular.
[0027] The end cap 5 is sealed by the limiting plug 12 on the slide plate 11 cooperating with the limiting slot of the heating box 1. The metal elastic strip 13 provides continuous elasticity to make the limiting plug fit tightly with the slot, preventing the leakage of hot air inside the box during heating.
[0028] In order to remove end cap 5 so that end cap 5 can be lifted stably, as follows Figure 1-3 As shown, a steel wire rope 14 is fixedly connected to the side wall of the slide plate 11. The end of the steel wire rope 14 away from the slide plate 11 extends into the inside of the pull ring 10 and is fixedly connected to a connecting frame 15. The sliding arrangement of the connecting frame 15 is located on the inner wall of the rectangular groove of the pull ring 10. An arc-shaped stop bar 16 is fixedly connected to the top of the connecting frame 15.
[0029] When the end cap 5 needs to be lifted by pulling the pull ring 10, the traction hook body is extended to the gap between the connecting frame 15 and the arc-shaped stop bar 16. When the traction hook body rises, it can pull the arc-shaped stop bar 16 and the connecting frame 15 to rise, causing the steel wire rope 14 to move. This can cause the metal elastic strip 13 to bend and compress, causing the limit plug 12 to retract into the cavity. The end cap 5 can then be removed so that the end cap 5 can be lifted stably.
[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A precision gear heat treatment apparatus, comprising a heating chamber (1), characterized in that: The inner wall of the heating box (1) is provided with an asbestos heat insulation pad (2), the inner wall of the heating box (1) is provided with a first heating tube (3), the bottom of the heating box (1) is provided with a second heating tube (4), the top of the heating box (1) is provided with an opening, the inner wall of the heating box (1) is provided with an end cap (5), the bottom of the end cap (5) is fixedly connected with two connecting plates (6), and multiple placement plates (7) are fixedly connected to the corresponding side of the two connecting plates (6). Multiple placement seats (8) are fixedly connected to the upper surface of the multiple placement plates (7), and the placement seats (8) are set as conical columns.
2. The precision gear heat treatment apparatus according to claim 1, characterized in that: The top of the end cap (5) is fixedly connected to a connecting seat (9), and the top of the connecting seat (9) is fixedly connected to a pull ring (10). The inner wall of the pull ring (10) is provided with a rectangular groove.
3. The precision gear heat treatment apparatus according to claim 1, characterized in that: The connecting plate (6) has multiple heat-conducting openings on its inner wall at the intervals between the multiple placement plates (7).
4. The precision gear heat treatment apparatus according to claim 1, characterized in that: The inner wall of the end cap (5) has a cavity, and the end cap (5) is slidably provided with a slide plate (11) on the inner wall of the cavity. A limit plug (12) is fixedly connected to the side wall of the slide plate (11). A limit slot is provided on the inner wall of the heating box (1), and the limit plug (12) is inserted into the inner wall of the limit slot.
5. The precision gear heat treatment apparatus according to claim 1, characterized in that: The end cap (5) is fixedly connected to a metal elastic strip (13) on the inner wall of the cavity, and the end of the metal elastic strip (13) is fixedly connected to the side of the slide plate (11) away from the limiting block (12).
6. The precision gear heat treatment apparatus according to claim 4, characterized in that: A steel wire rope (14) is fixedly connected to the side wall of the slide plate (11). The end of the steel wire rope (14) away from the slide plate (11) extends into the inside of the pull ring (10) and is fixedly connected to a connecting frame (15). The sliding arrangement of the connecting frame (15) is located on the inner wall of the rectangular groove of the pull ring (10). An arc-shaped stop bar (16) is fixedly connected to the top of the connecting frame (15).