Adjustable feeding mechanism for quenching machine

Abstract

The application provides an adjustable feeding mechanism for a quenching machine, and relates to the field of steel pipe processing. The adjustable feeding mechanism comprises a frame body, a conveying belt arranged on the frame body, a plurality of slide rails fixedly connected to the surface of the conveying belt, two fixing seats slidably arranged on the slide rails, two clamping plates arranged in the fixing seats, a connecting mechanism arranged in the fixing seats, and two outer ring plates arranged outside the conveying belt. The frame body, the conveying belt, the slide rails, the fixing seats, the clamping plates, the outer ring plates, the inner ring plates, the annular guide grooves, the protrusions, the connecting rods, the rectangular frames, the rollers, the sliding plates, the rotating plates, the fixing plates, the through grooves and the return springs are matched with each other, so that the steel pipe can be easily put into the head section of the conveying belt, automatically clamped in the middle section, automatically loosened in the tail section and easily taken out, the labor intensity of the operator is significantly reduced, and the convenience and work efficiency of feeding and discharging are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing, and more specifically, to an adjustable feeding mechanism for a quenching machine tool. Background Technology

[0002] Seamless tapered steel pipe refers to a hollow cylindrical pipe with different diameters at both ends, made from seamless steel pipe as raw material and processed through a hot expansion process. Seamless tapered steel pipe has no butt joints or welds in the middle and has a smooth surface. It is also known as tapered pipe. Tapered pipe is a type of variable cross-section pipe and serves as a transition element between different diameter pipes in engineering cement conveying systems and shipbuilding systems. The main material is carbon steel, but stainless steel and alloy steel can also be used. Quenching is a common heat treatment process for tapered pipe, which can significantly improve hardness and wear resistance.

[0003] In the prior art, Chinese utility model patent with announcement number CN223962700U discloses a feeding mechanism for a quenching machine tool. It utilizes the cooperation of a telescopic rod, a spring, and a clamping plate on the inner wall of a fixed housing. After the steel pipe falls into the fixed housing, the clamping plate rebounds due to the spring force to clamp and fix the steel pipe.

[0004] However, in practical use, the aforementioned existing technology suffers from several drawbacks. Because the fixed housing has an open-top U-shaped groove structure, and the clamping plates are located on the inner wall of the fixed housing and arranged opposite each other, the initial distance between the two clamping plates is smaller than the outer diameter of the steel pipe. When inserting the steel pipe into the fixed housing, the operator must overcome the spring force to apply external force and press the steel pipe downwards, forcing the clamping plates to retract outwards before the steel pipe can be inserted between them. This process not only increases the intensity of manual labor but also requires tools to assist in pressing down when the steel pipe diameter is large or the spring stiffness is high. The operation is extremely inconvenient. After the steel pipe is transported to the quenching station, the clamping plate keeps the steel pipe clamped under the action of the spring. The operator needs to apply external force again to pull the steel pipe upward to overcome the clamping force of the clamping plate in order to complete the unloading. This pulling process is also time-consuming and laborious, and the steel pipe is prone to slipping and falling due to uneven force, which poses a significant safety hazard. This prolongs the cycle time of the entire quenching process and makes it difficult to meet the needs of batch continuous production. In view of this, we propose an adjustable feeding mechanism for quenching machine tools to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to solve the problem of inconvenience in using adjustable feeding mechanisms for some current quenching machine tools.

[0006] To achieve the above-mentioned objectives and improve the aforementioned problems, this utility model provides an adjustable feeding mechanism for a quenching machine tool, comprising a frame, a conveyor belt mounted on the frame, several slide rails fixedly connected to the surface of the conveyor belt, two fixed seats slidably mounted on the slide rails, two clamping plates inside the fixed seats, a connecting mechanism inside the fixed seats, two outer ring plates outside the conveyor belt, an inner ring plate inside the outer ring plates, and an annular guide groove formed between the outer and inner ring plates, with a U-shaped fixing rod fixedly connected to the outside of both the outer and inner ring plates, and protrusions fixedly connected to the surfaces of the outer and inner ring plates on opposite sides, the protrusions being located on the upper and lower sides of the annular guide groove, a connecting rod movably mounted inside the annular guide groove, a rectangular frame fixedly connected to the end of the connecting rod, two rollers embedded inside the rectangular frame, a transmission mechanism at the end of the connecting rod near the fixed seat, and an adjustment mechanism on the outside of the frame.

[0007] As a preferred technical solution of this application, both ends of the convex rib are set as inclined surfaces, and both rollers are in contact with the outer ring plate, the inner ring plate and the convex rib.

[0008] As a preferred technical solution of this application, the connecting mechanism includes a sliding plate, which is slidably connected inside the fixed base, and several return springs are fixedly connected to both sides of the sliding plate. The ends of the return springs on both sides away from the sliding plate are fixedly connected to the inner wall of the fixed base and the surface of the clamping plate, respectively.

[0009] As a preferred technical solution of this application, the transmission mechanism includes a fixed plate, the fixed plate and the connecting rod are fixedly connected, the fixed seat has a through groove on the side surface facing the fixed plate, and the sliding plate has a rotating plate hinged to its surface.

[0010] As a preferred technical solution of this application, the rotating plate extends movably into the interior of the through groove, and the end of the rotating plate away from the sliding plate is hinged to the fixed plate.

[0011] As a preferred technical solution of this application, the adjustment mechanism includes a support plate, which is fixedly connected to the upper and lower surfaces of the frame, and a bidirectional threaded rod is rotatably connected between the two opposing support plates. A connecting plate is threaded to each of the two opposite threads of the bidirectional threaded rod, and the connecting plate is fixedly connected to an adjacent outer ring plate.

[0012] As a preferred technical solution of this application, an annular limiting groove is provided on the side surface of the inner ring plate facing the fixed seat, and a limiting rod is movably provided inside the annular limiting groove. The limiting rod extends out of the interior of the annular limiting groove and is fixedly connected to the fixed seat.

[0013] As a preferred technical solution of this application, a motor is fixedly connected to the surface of the left support plate. The output shaft of the motor rotates through the left support plate and is fixedly connected to the upper bidirectional threaded rod. The right ends of the two bidirectional threaded rods rotate through the surface of the right support plate, and belt drive assemblies are provided at the right ends of the two bidirectional threaded rods.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the scheme of this application:

[0016] 1. Through the coordination of the frame, conveyor belt, slide rail, fixed seat, clamping plate, outer ring plate, inner ring plate, annular guide groove, protrusion, connecting rod, rectangular frame, roller, sliding plate, rotating plate, fixed plate, through groove, return spring and other structures, the steel pipe is easily put into the first section of the conveyor belt, automatically clamped in the middle section, and automatically released and easily taken out at the end section. This significantly reduces the labor intensity of the operators and greatly improves the convenience of loading and unloading and the efficiency of operation.

[0017] 2. Through the coordination of the frame, support plate, bidirectional threaded rod, connecting plate, C-shaped fixing rod, outer ring plate, inner ring plate, annular limiting groove, limiting rod, slide rail, fixed seat, belt drive assembly, and other structures, the distance between the two fixed seats can be quickly and accurately adjusted. This allows the feeding mechanism to be compatible with steel pipes of different lengths, and switching can be completed without replacing any parts, demonstrating strong versatility. At the same time, the steel pipes are automatically clamped in the middle of the conveyor belt, effectively preventing pipe skewing or shifting caused by vibration during the conveying process, ensuring the positioning accuracy of the quenching process and the stability of the continuous production cycle. Attached Figure Description

[0018] Figure 1 A schematic diagram of the adjustable feeding mechanism for a quenching machine tool provided in this application;

[0019] Figure 2 This is a schematic diagram of the slide rail structure in the adjustable feeding mechanism for quenching machine tools provided in this application;

[0020] Figure 3 This is a cross-sectional view of the fixed seat in the adjustable feeding mechanism for quenching machine tools provided in this application.

[0021] Figure 4 This is a first schematic cross-sectional view of the outer ring plate in the adjustable feeding mechanism for quenching machine tools provided in this application;

[0022] Figure 5 This is a second schematic cross-sectional view of the outer ring plate in the adjustable feeding mechanism for quenching machine tools provided in this application;

[0023] Figure 6 Provided for this application Figure 5 Enlarged view of point A in the middle.

[0024] The image shows:

[0025] 1. Frame; 2. Conveyor belt; 3. Slide rail; 4. Fixed base; 5. Clamping plate; 6. Outer ring plate; 7. Inner ring plate; 8. Annular guide groove; 9. Protruding rib;

[0026] 10. Connecting rod; 11. Rectangular frame; 12. Roller; 13. Sliding plate; 14. Rotating plate; 15. Fixing plate; 16. Through groove; 17. C-shaped fixing rod; 18. Return spring;

[0027] 19. Support plate; 20. Bidirectional threaded rod; 21. Connecting plate; 22. Annular limiting groove; 23. Limiting rod; 24. Motor; 25. Belt drive assembly. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] Please refer to Figures 1-6An adjustable feeding mechanism for a quenching machine tool includes a frame 1, a conveyor belt 2 mounted on the frame 1, several slide rails 3 fixedly connected to the surface of the conveyor belt 2, two fixed seats 4 slidably mounted on the slide rails 3, two clamping plates 5 inside the fixed seats 4, a connecting mechanism inside the fixed seats 4, two outer ring plates 6 outside the conveyor belt 2, an inner ring plate 7 inside the outer ring plates 6, and an annular guide groove 8 formed between the outer ring plates 6 and the inner ring plates 7, and both the outer ring plates 6 and the inner ring plates 7 are fixedly connected to the outside. There is a U-shaped fixing rod 17 for connecting the outer ring plate 6 and the inner ring plate 7 into a whole. The outer ring plate 6 and the inner ring plate 7 on the opposite sides are fixedly connected with protrusions 9. The protrusions 9 are located on the upper and lower sides of the annular guide groove 8. A connecting rod 10 is movably arranged inside the annular guide groove 8. A rectangular frame 11 is fixedly connected to the end of the connecting rod 10. Two rollers 12 are embedded inside the rectangular frame 11. A transmission mechanism is provided at the end of the connecting rod 10 near the fixed seat 4. An adjustment mechanism is provided on the outside of the frame 1.

[0033] Among them, a drive device is also matched with the conveyor belt 2. Since it is a conventional technical means in this field and not a major direction for improvement, it will not be described in detail in this article.

[0034] In the above embodiments, the number of slide rails 3 shown in the figure is only for illustration, and the specific number can be increased or decreased by those skilled in the art according to actual usage needs, and the specific number is not limited.

[0035] Furthermore, such as Figures 1-6 As shown, both ends of the convex rib 9 are set as inclined surfaces, and both rollers 12 are in contact with the outer ring plate 6, the inner ring plate 7 and the convex rib 9.

[0036] With this setup, when the fixed seat 4 moves with the conveyor belt 2, the roller 12 will also roll on the surfaces of the inner ring plate 7, the outer ring plate 6, and the convex rib 9. Under the action of the inclined surface at the end of the convex rib 9, the movement trajectory of the roller 12 becomes smoother, preventing the roller 12 from getting stuck.

[0037] Furthermore, such as Figures 1-6 As shown, the connecting mechanism includes a sliding plate 13, which is slidably connected inside the fixed base 4. Several return springs 18 are fixedly connected to both sides of the sliding plate 13. The ends of the return springs 18 on both sides away from the sliding plate 13 are fixedly connected to the inner wall of the fixed base 4 and the surface of the clamping plate 5, respectively.

[0038] With this configuration, by setting a return spring 18 between the sliding plate 13 and the clamping plate 5, the clamping plate 5 can have a certain floating space, thus enabling it to clamp steel pipes with different diameters and improving versatility. By setting a return spring 18 between the sliding plate 13 and the inner wall of the fixed seat 4, the sliding plate 13 can be reset, thereby driving the clamping plate 5 to move and release the clamping of the steel pipe.

[0039] Furthermore, such as Figures 1-6 As shown, the transmission mechanism includes a fixed plate 15, which is fixedly connected to a connecting rod 10. A through groove 16 is provided on the side surface of the fixed seat 4 facing the fixed plate 15, and a rotating plate 14 is hinged to the surface of the sliding plate 13.

[0040] Furthermore, such as Figures 1-6 As shown, the rotating plate 14 extends movably into the interior of the through groove 16, and the end of the rotating plate 14 away from the sliding plate 13 is hinged to the fixed plate 15.

[0041] With this setup, during use, the operator places the conveyor belt steel pipe inside the fixed seat 4 and between the two clamping plates 5. At this time, the roller 12 does not contact the protrusion 9, so the two sliding plates 13 inside the fixed seat 4 are in a state of mutual distance, thus preventing the clamping plates 5 from clamping the steel pipe. Subsequently, the movement of the conveyor belt 2 will drive the slide rail 3 to move, thereby driving the fixed seat 4 to move. When the fixed seat 4 moves, the connecting rod 10 will move inside the annular guide groove 8. When the roller 12 contacts the inclined surface of the protrusion 9, it will force the roller 12 to move away from the fixed seat 4, thus carrying the conveyor belt 2. The moving fixed plate 15 moves away from the fixed seat 4. Since the length of the rotating plate 14 is fixed, it will pull the two sliding plates 13 closer to the middle, so that the clamping plate 5 clamps the steel pipe. At this time, the steel pipe located in the middle section of the conveyor belt 2 can be clamped and limited. When the steel pipe moves to the end of the conveyor belt 2, the roller 12 disengages from the convex 9. Under the action of the return spring 18, the sliding plate 13 will be reset, thereby automatically canceling the clamping of the steel pipe. The rotating plate 14, the fixed plate 15 and the connecting rod 10 will all return to their initial state, and the roller 12 will contact the surfaces of the outer ring plate 6 and the inner ring plate 7.

[0042] Furthermore, such as Figures 1-6 As shown, the adjustment mechanism includes a support plate 19, which is fixedly connected to the upper and lower surfaces of the frame 1. A bidirectional threaded rod 20 is rotatably connected between the two opposing support plates 19. A connecting plate 21 is threadedly connected to the two opposite threads of the bidirectional threaded rod 20. The connecting plate 21 is fixedly connected to the adjacent outer ring plate 6.

[0043] With this setup, the rotation of the bidirectional threaded rod 20 can drive the movement of the connecting plate 21, which in turn drives the movement of the outer ring plate 6. At this time, the inner ring plate 7 will also be driven to move under the action of the U-shaped fixing rod 17.

[0044] In addition, the inner ring plate 7 in this design does not come into contact with the conveyor belt 2, thus effectively avoiding interference.

[0045] Furthermore, such as Figures 1-6 As shown, an annular limiting groove 22 is provided on the side surface of the inner ring plate 7 facing the fixed base 4. A limiting rod 23 is movably provided inside the annular limiting groove 22. The limiting rod 23 extends out of the interior of the annular limiting groove 22 and is fixedly connected to the fixed base 4.

[0046] With this configuration, when the outer ring plate 6 and the inner ring plate 7 move, the fixed seat 4 will also slide on the slide rail 3 under the action of the annular limiting groove 22 and the limiting rod 23, thereby adjusting the distance between the two fixed seats 4 on the slide rail 3, thus fixing steel pipes of different lengths and improving the versatility and flexibility of the device.

[0047] Furthermore, such as Figures 1-6 As shown, a motor 24 is fixedly connected to the surface of the left support plate 19. The output shaft of the motor 24 rotates through the left support plate 19 and is fixedly connected to the upper bidirectional threaded rod 20. The right ends of the two bidirectional threaded rods 20 rotate through the surface of the right support plate 19, and belt drive assemblies 25 are provided at the right ends of the two bidirectional threaded rods 20.

[0048] With this setup, the upper bidirectional threaded rod 20 can be rotated by starting the motor 24 via an external controller. With the belt drive assembly 25, the lower bidirectional threaded rod 20 can also be rotated synchronously when the upper bidirectional threaded rod 20 rotates, thereby further ensuring the stability of the inner ring plate 7 and the outer ring plate 6 during movement.

[0049] The adjustable feeding mechanism for quenching machine tools provided by this utility model is used as follows:

[0050] In the initial state, the conveyor belt 2 remains stationary or in standby mode. The roller 12 on the fixed seat 4 at the head of the conveyor belt 2 is not in contact with the convex rib 9. The connecting rod 10 and the fixed plate 15 are in a position close to the fixed seat 4. The two sliding plates 13 are in a state of being far apart from each other under the action of the return spring 18. The distance between the clamping plates 5 fixedly connected to them is greater than the outer diameter of the steel pipe. The operator can easily put the steel pipe to be quenched into the fixed seat 4 and place it between the two clamping plates 5 without applying additional downward pressure. The feeding process is convenient and quick.

[0051] Then the conveyor belt 2 is started. The movement of the conveyor belt 2 drives the slide rail 3 fixedly connected to its surface to move synchronously. The slide rail 3 then drives the two fixed seats 4 that are slidably set on it to move forward together. At the same time, the limiting rod 23 fixedly connected to the fixed seat 4 slides inside the annular limiting groove 22. The movement of the fixed seat 4 will also drive the connecting rod 10 fixedly connected to the fixed seat 4 to move inside the annular guide groove 8. Both rollers 12 are in contact with the surfaces of the outer ring plate 6, the inner ring plate 7 and the protrusion 9 and roll accordingly.

[0052] When the fixed seat 4 moves from the head section to the middle section under the drive of the conveyor belt 2, the roller 12 rolls along the surface of the outer ring plate 6 and the inner ring plate 7 to the position of the protrusion 9. Both ends of the protrusion 9 are set as inclined surfaces. Under the guidance of the inclined surfaces, the roller 12 moves radially away from the fixed seat 4, driving the rectangular frame 11 and the connecting rod 10 to move synchronously. The fixed plate 15, which is fixedly connected to the end of the connecting rod 10, moves away from the fixed seat 4. Since one end of the rotating plate 14 is hinged to the fixed plate 15 and the other end is hinged to the sliding plate 13, and the rotating plate 14 extends through the through groove 16 into the interior of the fixed seat 4, the movement of the fixed plate 15 away from the fixed seat 4 will pull the two sliding plates 13 to overcome the elastic force of the return spring 18 and move closer to each other in the middle. The movement of the sliding plate 13 will drive the clamping plate 5, which is fixedly connected to it, to move closer to the middle in the same way until the clamping plates 5 on both sides clamp and fix the steel pipe, thereby realizing the automatic clamping and positioning of the steel pipe located in the middle section of the conveyor belt 2, effectively preventing the steel pipe from deviating or moving during subsequent conveying.

[0053] When the fixed seat 4 continues to run with the conveyor belt 2 to the end, the roller 12 disengages from the surface of the convex rib 9, the elastic force of the return spring 18 is released, and the two sliding plates 13 are pushed back to the direction away from each other, thereby driving the clamping plate 5 to loosen the steel pipe and automatically cancel the clamping state. At this time, the operator can easily remove the steel pipe from the fixed seat 4 without applying additional pulling force, and complete the unloading. The above clamping and loosening actions are completely automatically completed by the operation of the conveyor belt 2 and the related mechanisms, without the need for additional power source or manual intervention.

[0054] Furthermore, when it is necessary to accommodate steel pipes of different lengths, the operator can start the motor 24 through an external controller. At this time, the output shaft of the motor 24 can drive the upper bidirectional threaded rod 20 to rotate, and through the belt transmission assembly 25, drive the upper and lower bidirectional threaded rods 20 to rotate synchronously. The rotation of the bidirectional threaded rod 20 drives the two connecting plates 21 to move towards or away from each other. The connecting plates 21 drive the outer ring plate 6 fixedly connected to them to move synchronously. The outer ring plate 6 drives the inner ring plate 7 to move synchronously through the C-shaped fixing rod 17. When the inner ring plate 7 moves, the two fixed seats 4 slide towards or away from each other on the slide rail 3 through the cooperation of the annular limiting groove 22 and the limiting rod 23, thereby precisely adjusting the distance between the two fixed seats 4 on the same slide rail 3 to adapt to the placement and clamping requirements of steel pipes of different lengths.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; conversely, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. An adjustable feeding mechanism for a quenching machine tool, characterized in that, The system includes a frame (1), on which a conveyor belt (2) is mounted. Several slide rails (3) are fixedly connected to the surface of the conveyor belt (2). Two fixed seats (4) are slidably mounted on the slide rails (3). Two clamping plates (5) are installed inside the fixed seats (4). A connecting mechanism is installed inside the fixed seats (4). Two outer ring plates (6) are installed on the outside of the conveyor belt (2). An inner ring plate (7) is installed inside the outer ring plate (6). An annular guide groove (8) is formed between the outer ring plate (6) and the inner ring plate (7). The outer surface of the frame is fixedly connected with a U-shaped fixing rod (17). The outer ring plate (6) and inner ring plate (7) on both sides are fixedly connected with protrusions (9). The protrusions (9) are located on the upper and lower sides of the annular guide groove (8). A connecting rod (10) is movably provided inside the annular guide groove (8). A rectangular frame (11) is fixedly connected to the end of the connecting rod (10). Two rollers (12) are embedded inside the rectangular frame (11). A transmission mechanism is provided at the end of the connecting rod (10) near the fixed seat (4). An adjustment mechanism is provided on the outside of the frame (1).

2. The adjustable feeding mechanism for a quenching machine tool according to claim 1, characterized in that, Both ends of the convex rib (9) are set as inclined surfaces, and both rollers (12) are in contact with the outer ring plate (6), the inner ring plate (7) and the convex rib (9).

3. The adjustable feeding mechanism for a quenching machine tool according to claim 2, characterized in that, The connecting mechanism includes a sliding plate (13), which is slidably connected inside the fixed seat (4). Several return springs (18) are fixedly connected to both sides of the sliding plate (13). The end of the return springs (18) on both sides away from the sliding plate (13) is fixedly connected to the inner wall of the fixed seat (4) and the surface of the clamping plate (5), respectively.

4. The adjustable feeding mechanism for a quenching machine tool according to claim 3, characterized in that, The transmission mechanism includes a fixed plate (15), which is fixedly connected to a connecting rod (10). The fixed seat (4) has a through groove (16) on the side surface facing the fixed plate (15), and a rotating plate (14) is hinged to the surface of the sliding plate (13).

5. The adjustable feeding mechanism for a quenching machine tool according to claim 4, characterized in that, The rotating plate (14) extends movably into the interior of the through groove (16), and the end of the rotating plate (14) away from the sliding plate (13) is hinged to the fixed plate (15).

6. The adjustable feeding mechanism for a quenching machine tool according to claim 5, characterized in that, The adjustment mechanism includes a support plate (19), which is fixedly connected to the upper and lower surfaces of the frame (1). A bidirectional threaded rod (20) is rotatably connected between the two opposing support plates (19). A connecting plate (21) is threaded to each of the two opposite threads of the bidirectional threaded rod (20). The connecting plate (21) is fixedly connected to the adjacent outer ring plate (6).

7. The adjustable feeding mechanism for a quenching machine tool according to claim 6, characterized in that, The inner ring plate (7) has an annular limiting groove (22) on the side facing the fixed seat (4). A limiting rod (23) is movably provided inside the annular limiting groove (22). The limiting rod (23) extends out of the annular limiting groove (22) and is fixedly connected to the fixed seat (4).

8. The adjustable feeding mechanism for a quenching machine tool according to claim 7, characterized in that, A motor (24) is fixedly connected to the surface of the left support plate (19). The output shaft of the motor (24) rotates through the left support plate (19) and is fixedly connected to the upper bidirectional threaded rod (20). The right ends of the two bidirectional threaded rods (20) rotate through the surface of the right support plate (19). A belt drive assembly (25) is provided at the right ends of the two bidirectional threaded rods (20).

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