Gear shaft supporting device

Abstract

The utility model belongs to the technical field of gear shaft heat treatment, and discloses a gear shaft supporting device. The gear shaft supporting device comprises a first end plate and a connecting column, the first end plate is provided with a supporting face, an annular protruding portion of the gear shaft is provided with an abutting face, and the supporting face is used for abutting against the abutting face. The connecting column is arranged on the first end plate and used for abutting against a furnace bottom plate of the carburizing furnace, a placement hole is formed in the first end plate, a loading channel is formed in the connecting column, the loading channel communicates with the placement hole and used for containing the part, penetrating through the placement hole, of the gear shaft, and the inner diameter of the placement hole is smaller than the diameter of the annular protruding part. In the axial direction of the gear shaft, the distance between the abutting face and the end face, close to the furnace bottom plate, of the gear shaft is smaller than the length of the loading channel. The gear shaft supporting device can support the gear shaft in the carburizing furnace, high-temperature creep deformation caused by the fact that the end of the gear shaft is pressed in the heat treatment process is prevented, quenching bending deformation is reduced, and the heat treatment effect of the gear shaft is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gear shaft heat treatment, in particular to a gear shaft supporting device. Background Art

[0002] A gear shaft is a mechanical component that supports rotating parts and rotates with them to transmit motion, torque, or bending moment. It is generally a round metal rod with varying diameters. The rotating parts of the machine are mounted on the shaft. To improve the wear and fatigue resistance of the gear shaft, it is heat treated during processing. This involves placing the gear shaft in a carburizing furnace through a rack and subjecting it to carburizing and quenching processes. However, this rack-loading heat treatment method can cause significant high-temperature creep and bending deformation in the gear shaft during the heat treatment process, causing the gear shaft to exceed the allowable deformation range and fail to meet the machining accuracy requirements. Utility Model Content

[0003] The purpose of the utility model is to provide a gear shaft supporting device, which can support the gear shaft in a carburizing furnace to ensure the heat treatment effect of the gear shaft.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] The utility model provides a gear shaft supporting device, comprising:

[0006] a first end plate, the first end plate having a supporting surface, the annular protrusion of the gear shaft having an abutting surface, the supporting surface being configured to abut against the abutting surface, the first end plate being provided with a placement hole for the gear shaft to pass through, the inner diameter of the placement hole being smaller than the diameter of the annular protrusion;

[0007] A connecting column, wherein the connecting column is arranged on the lower side of the first end plate, and the bottom end of the connecting column is used to abut against the furnace bottom plate of the carburizing furnace. The interior of the connecting column has a loading channel, and the loading channel is connected to the placement hole. The loading channel is used to accommodate the portion of the gear shaft passing through the placement hole. Along the axial direction of the gear shaft, the distance between the abutment surface and the end face of the gear shaft close to the furnace bottom plate is less than the length of the loading channel.

[0008] Preferably, a first flow hole is provided on the connecting column, the first flow hole is connected to the loading channel, and the first flow hole is used for gas circulation in the carburizing furnace.

[0009] Preferably, the gear shaft supporting device further comprises a second end plate, which is arranged at the end of the connecting column away from the first end plate, and the second end plate is used to abut against the furnace bottom plate.

[0010] Preferably, a second flow hole is provided on the second end plate, the second flow hole is communicated with the loading channel, and the second flow hole is used for gas circulation in the carburizing furnace.

[0011] Preferably, a support plate is provided on the connecting column, and two ends of the support plate are respectively connected to the first end plate and the second end plate.

[0012] Preferably, a plurality of support plates are provided, and the plurality of support plates are evenly spaced along the circumference of the connecting column.

[0013] Preferably, a reinforcing rib is provided on the support plate, and two ends of the reinforcing rib are respectively connected to the first end plate and the second end plate.

[0014] Preferably, a plurality of first flanges are evenly spaced along the circumferential direction on the first end plate, and a first reserved groove is formed by a depression between two adjacent first flanges.

[0015] Preferably, a plurality of second flanges are evenly spaced along the circumferential direction on the second end plate, and a second reserved groove is formed by a depression between two adjacent second flanges.

[0016] Preferably, the number of the first flanges is the same as the number of the second flanges and they are arranged opposite each other.

[0017] A support plate is provided between the first flange and the second flange facing each other along the axial direction of the gear shaft.

[0018] The beneficial effects of the present invention are:

[0019] The gear shaft supporting device provided by the present invention is composed of a first end plate and a connecting column that are connected to each other. The connecting column is used to abut against the furnace bottom plate of the carburizing furnace. A mounting hole is opened on the first end plate. The connecting column has a loading channel connected to the mounting hole. The loading channel is used to accommodate the gear shaft passing through the mounting hole. Since the inner diameter of the mounting hole is smaller than the diameter of the annular protrusion, the gear shaft can be placed on the first end plate by abutting the abutting surface of the annular protrusion with the supporting surface, and then placed in the carburizing furnace for heat treatment through the connecting column. Since the distance between the abutting surface and the end face of the gear shaft along the axial direction of the gear shaft is smaller than the length of the loading channel, the end face of the gear shaft does not contact the furnace bottom plate and is in a freely suspended state, thereby preventing high-temperature creep due to pressure on the end of the gear shaft during high-temperature heat treatment, reducing the amount of quenching bending deformation, and ensuring the heat treatment effect of the gear shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of a gear shaft support device provided by a specific embodiment of the present utility model;

[0021] Figure 2 It is a structural schematic diagram of a gear shaft supporting device provided in a specific embodiment of the present utility model.

[0022] In the picture:

[0023] 100-gear shaft; 110-annular convex portion;

[0024] 200-furnace bottom plate;

[0025] 1-first end plate; 11-support surface; 12-first flange; 13-first reserved groove;

[0026] 2-connecting column; 21-loading channel; 22-first flow hole; 23-support plate; 24-reinforcement rib;

[0027] 3-second end plate; 32-second flange; 33-second reserved groove. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0029] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0032] like Figure 1 and Figure 2 As shown, the utility model provides a gear shaft supporting device, which includes a first end plate 1 and a connecting column 2. The first end plate 1 has a supporting surface 11, and the annular protrusion 110 of the gear shaft 100 has an abutting surface. The supporting surface 11 is used to abut with the abutting surface. A placement hole is opened on the first end plate 1, and the placement hole is used for the gear shaft 100 to pass through. The inner diameter of the placement hole is smaller than the diameter of the annular protrusion 110; the connecting column 2 is arranged on the lower side of the first end plate 1, and the bottom end of the connecting column 2 is used to abut with the furnace bottom plate 200 of the carburizing furnace. The interior of the connecting column 2 is provided with a loading channel 21, and the loading channel 21 is connected to the placement hole. The loading channel 21 is used to accommodate the part of the gear shaft 100 passing through the placement hole. Along the axial direction of the gear shaft 100, the distance between the abutting surface and the end face of the gear shaft 100 close to the furnace bottom plate 200 is less than the length of the loading channel 21. In this embodiment, the gear shaft supporting device is composed of a first end plate 1 and a connecting column 2 connected to each other. The connecting column 2 is used to abut against the furnace bottom plate 200 of the carburizing furnace. A mounting hole is opened on the first end plate 1, and the connecting column 2 has a loading channel 21 connected to the mounting hole. The loading channel 21 is used to accommodate the gear shaft 100 passing through the mounting hole; since the inner diameter of the mounting hole is smaller than the diameter of the annular protrusion 110, the gear shaft 100 can be placed on the first end plate 1 through the abutment surface of the annular protrusion 110 abutting against the supporting surface 11, and then placed in the carburizing furnace for heat treatment through the connecting column 2; since the distance between the abutment surface and the end face of the gear shaft along the axial direction of the gear shaft 100 is smaller than the length of the loading channel 21, the end face of the gear shaft 100 does not contact the furnace bottom plate 200 and is in a freely suspended state, thereby preventing high-temperature creep due to pressure on the end of the gear shaft 100 during high-temperature heat treatment, reducing the amount of quenching bending deformation, and ensuring the heat treatment effect of the gear shaft 100. Specifically, when using the gear shaft supporting device, the gear shaft supporting device is first placed on the furnace bottom plate 200 of the carburizing furnace, and then the gear shaft 100 to be processed is placed into the loading channel 21 through the placement hole along the length direction; and since the diameter of the annular protrusion 110 on the gear shaft 100 is larger than the inner diameter of the placement hole, the support surface 11 of the first end plate 1 will support the annular protrusion 110; and the end of the gear shaft 100 is in a suspended state, thereby achieving the purpose of reducing the bending deformation of the gear shaft 100 during carburizing and quenching.

[0033] Furthermore, if Figure 2 As shown, the connecting column 2 is provided with a first flow hole 22, which communicates with the loading channel 21. The first flow hole 22 is used to circulate gas within the carburizing furnace. In this embodiment, the first flow hole 22 is provided on the wall of the connecting column 2, which communicates with the internal loading channel 21. Gas can enter the loading channel 21 through the first flow hole 22, thereby ensuring that carbon atoms in the carburizing furnace can enter the loading channel 21 with the flow of furnace gas and further penetrate into the gear tooth surface of the gear shaft 100, thereby achieving carburizing heat treatment of the gear shaft 100.

[0034] Furthermore, if Figure 1 and Figure 2 As shown, the gear shaft support device further includes a second end plate 3, which is disposed at the end of the connecting column 2 away from the first end plate 1. The second end plate 3 is configured to abut against the furnace floor 200. In this embodiment, the connecting column 2 is a hollow cylindrical structure, with the second end plate 3 and the first end plate 1 disposed at either end of the connecting column 2, respectively. The second end plate 3 is placed on the furnace floor 200 to increase the contact area between the gear shaft support device and the furnace floor 200, thereby improving the stability of the support for the gear shaft 100.

[0035] Specifically, if Figure 1 As shown, the second end plate 3 is provided with a second flow hole, which communicates with the loading channel 21 and is used to circulate gas within the carburizing furnace. In this embodiment, the second end plate 3 has the same shape and structure as the first end plate 1. The second flow hole further promotes gas flow within the carburizing furnace, allowing carbon atoms to enter the loading channel 21 from the bottom of the connecting column 2 through the second flow hole, thereby accelerating the penetration of carbon atoms into the surface of the gear shaft 100.

[0036] Specifically, if Figure 2 As shown, a support plate 23 is provided on the connecting column 2, and its two ends are respectively connected to the first end plate 1 and the second end plate 3. In this embodiment, a support plate 23 is provided on the outer wall of the connecting column 2, and its two ends are respectively connected to the first end plate 1 and the second end plate 3; the support plate 23 can provide auxiliary support for the connecting column 2, thereby improving the structural strength of the gear shaft support device.

[0037] Specifically, if Figure 2 As shown, a plurality of support plates 23 are provided, and the plurality of support plates 23 are evenly spaced along the circumference of the connecting column 2. In this embodiment, the connecting column 2 is a hollow cylindrical structure, and the support plates 23 are evenly spaced along the circumference of the connecting column 2 on the outer wall surface of the connecting column 2, thereby ensuring the structural strength and support stability of the gear shaft support device at all locations.

[0038] Specifically, if Figure 2 As shown, the support plate 23 is provided with a reinforcing rib 24, and the two ends of the reinforcing rib 24 are respectively connected to the first end plate 1 and the second end plate 3. In this embodiment, the reinforcing rib 24 is provided on the support plate 23, and the reinforcing rib 24 is arranged at a certain angle to the support plate 23. The reinforcing rib 24 can improve the structural strength of the support plate 23, thereby further improving the compressive strength of the gear shaft support device.

[0039] Specifically, if Figure 2 As shown, the first end plate 1 is provided with a plurality of first flanges 12 evenly spaced along the circumference. A first reserved groove 13 is formed by a depression between two adjacent first flanges 12. In this embodiment, the first reserved groove 13 relieves thermal stress within the first end plate 1 during heat treatment, reducing deformation of the first end plate 1 and thereby ensuring a normal heat treatment of the gear shaft 100. Furthermore, the design of the first reserved groove 13 reduces the use of the first end plate 1 and the overall weight of the gear shaft support device.

[0040] Specifically, if Figure 2 As shown, the second end plate 3 is provided with a plurality of second flanges 32 evenly spaced along the circumference. A second reserved groove 33 is formed by a depression between two adjacent second flanges 32. In this embodiment, the second end plate 3 has the same shape as the first end plate 1. The second reserved groove 33 can relieve thermal stress within the second end plate 3 during heat treatment, reducing deformation of the second end plate 3 and thereby ensuring that the heat treatment of the gear shaft 100 proceeds normally. Furthermore, the design of the second reserved groove 33 saves on the use of the second end plate 3 and reduces the overall weight of the gear shaft support device.

[0041] Specifically, if Figure 2 As shown, the number of first flanges 12 and second flanges 32 is the same and they are arranged opposite each other. A support plate 23 is provided between the opposing first and second flanges 12, 32 along the axial direction of the gear shaft 100. In this embodiment, multiple support plates 23 are provided on the outer wall of the connecting column 2, with the ends of the support plates 23 connected to the first and second flanges 12, 32, respectively.

[0042] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Gear shaft support device, characterized in that: include: A first end plate (1), the first end plate (1) having a supporting surface (11), the annular protrusion (110) of the gear shaft (100) having an abutting surface, the supporting surface (11) being used to abut against the abutting surface, a placement hole being provided on the first end plate (1), the placement hole being used for the gear shaft (100) to pass through, the inner diameter of the placement hole being smaller than the diameter of the annular protrusion (110); A connecting column (2), wherein the connecting column (2) is arranged on the lower side of the first end plate (1), the bottom end of the connecting column (2) is used to abut against the furnace bottom plate (200) of the carburizing furnace, and the interior of the connecting column (2) is provided with a loading channel (21), the loading channel (21) is connected with the placement hole, and the loading channel (21) is used to accommodate the portion of the gear shaft (100) passing through the placement hole, and along the axial direction of the gear shaft (100), the distance between the abutting surface and the end face of the gear shaft (100) close to the furnace bottom plate (200) is less than the length of the loading channel (21).

2. The gear shaft support device according to claim 1, characterized in that: The connecting column (2) is provided with a first circulation hole (22), the first circulation hole (22) is communicated with the loading channel (21), and the first circulation hole (22) is used for gas circulation in the carburizing furnace.

3. The gear shaft supporting device according to claim 1, characterized in that: The gear shaft supporting device further comprises a second end plate (3), the second end plate (3) being arranged at an end of the connecting column (2) away from the first end plate (1), and the second end plate (3) being used to abut against the furnace bottom plate (200).

4. The gear shaft supporting device according to claim 3, characterized in that: A second circulation hole is provided on the second end plate (3), the second circulation hole is in communication with the loading channel (21), and the second circulation hole is used for gas circulation in the carburizing furnace.

5. The gear shaft supporting device according to claim 3, characterized in that: A support plate (23) is provided on the connecting column (2), and two ends of the support plate (23) are respectively connected to the first end plate (1) and the second end plate (3).

6. The gear shaft supporting device according to claim 5, characterized in that: A plurality of support plates (23) are provided, and the plurality of support plates (23) are evenly spaced along the circumference of the connecting column (2).

7. The gear shaft supporting device according to claim 6, characterized in that: The support plate (23) is provided with a reinforcing rib (24), and both ends of the reinforcing rib (24) are respectively connected to the first end plate (1) and the second end plate (3).

8. The gear shaft supporting device according to claim 3, characterized in that: A plurality of first flanges (12) are evenly spaced along the circumferential direction on the first end plate (1), and a first reserved groove (13) is formed by a depression between two adjacent first flanges (12).

9. The gear shaft supporting device according to claim 8, characterized in that: A plurality of second flanges (32) are evenly spaced along the circumferential direction on the second end plate (3), and a second reserved groove (33) is formed by a depression between two adjacent second flanges (32).

10. The gear shaft supporting device according to claim 9, characterized in that: The number of the first flanges (12) is the same as the number of the second flanges (32) and they are arranged opposite each other. A support plate (23) is provided between the first flange (12) and the second flange (32) facing each other along the axial direction of the gear shaft (100).

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