Automatic feeding continuous heat treatment device for processing automobile wheel hub blank

Abstract

The application discloses a kind of automatic feeding continuous heat treatment device for automobile hub blank processing, belong to hub processing technical field, it includes treatment furnace, end cap and placing rack, the treatment furnace side is fixedly connected with connecting pipe, the treatment furnace inner wall is fixedly installed with multiple burners at equal intervals;Through drive motor drives heat insulation cylinder rotation, V-shaped groove in the process successively pushes and props the fixed frame at each station, three stations alternate circulation, realize multi-station continuous heat treatment operation, and the spline block that moves downward can push and squeeze spherical block and make the through rod move downward, multiple hinged rods on the hinged sleeve at the end of through rod are synchronous deflected in the process, and then multiple hinged rods are synchronous pushed and prop corresponding baffle, so as to adjust the air volume of air outlet, to adapt the temperature balance demand in the process of workpiece in and out of furnace, station switching, effectively avoid the problem that temperature fluctuation, uneven heating occurs in the process of workpiece heat treatment and in and out of material, improve the forming quality of workpiece heat treatment.

Description

Technical Field

[0001] This invention relates to the field of wheel hub processing technology, specifically to a continuous heat treatment device with automatic feeding for processing automobile wheel hub blanks. Background Technology

[0002] The wheel hub is a key metal component connecting the wheel and the axle. Its main functions are to support the tire, transmit power and braking force, and bear the vertical load and lateral force when the vehicle is in motion. The wheel hub blank refers to the basic component that has undergone preliminary forming and processing but has not yet undergone final machining and surface treatment. It is the initial form for manufacturing wheels for automobiles, trains and construction machinery. Its internal structure and dimensional accuracy directly determine the strength, wear resistance and fatigue resistance of the final product, which is crucial to vehicle driving safety.

[0003] Currently, when performing continuous heat treatment on wheel hubs, the wheel hubs are usually transported by roller conveyor or chain conveyor. During the transport process, the heat treatment furnace box needs to be fully opened to allow the workpieces to enter and exit. The furnace opening will be left open for a long time, which will cause a large amount of heat to leak out and easily lead to drastic temperature fluctuations inside the furnace, affecting the heat treatment quality of the wheel hub blanks.

[0004] Based on this, the present invention designs an automatic feeding continuous heat treatment device for processing automobile wheel hub blanks to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous heat treatment device for automatic feeding of automobile wheel hub blanks, so as to solve the problem mentioned in the background art that the roller conveyor or chain conveyor mechanism needs to be fully opened for the workpiece to enter and exit, resulting in a large amount of heat loss and drastic temperature fluctuations in the furnace, which affect the heat treatment quality of the wheel hub blanks.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A continuous heat treatment device for automatic feeding of automobile wheel hub blanks includes a treatment furnace, an end cover and a placement rack. A connecting pipe is fixedly connected to one side of the treatment furnace. Multiple burners are fixedly installed at equal intervals on the inner wall of the treatment furnace. Hollow plates are fixedly connected to both sides above the treatment furnace. A support frame is fixedly connected to the bottom of the treatment furnace. A pushing mechanism is fixedly installed on the outer wall of the treatment furnace. Hollow columns are fixedly connected inside the treatment furnace.

[0008] A connecting hole is provided at the bottom of the hollow column. Multiple air outlets are provided at equal intervals on the outer wall of the hollow column at the connecting hole. A connecting pin is fixedly connected to the air outlet of the hollow column. A baffle is rotatably connected to the hollow column through the connecting pin. Three guide grooves are provided on the outer wall of the hollow column in a centrally symmetrical manner along the axis. A movable plate is slidably connected through the guide groove. An arc-shaped plate is fixedly connected to one side of the movable plate.

[0009] A fixed frame is fixedly connected to the other side of the movable plate. A heat insulation cylinder is rotatably installed inside the hollow column through a bearing. A spline groove is opened on the heat insulation cylinder. Two inverted V-shaped grooves and an arc-shaped groove are opened on the outer wall of the heat insulation cylinder in an up-down distribution manner. The two ends of the inverted V-shaped groove and the arc-shaped groove are connected to each other. An I-shaped ring is rotatably connected to the bottom of the heat insulation cylinder through a bearing. A through rod is slidably connected through the I-shaped ring. A spherical block is fixedly connected to one end of the through rod.

[0010] A fixed ring is fixedly connected to the through rod, and a return spring is sleeved on the through rod below the fixed ring. A hinge sleeve is fixedly connected to the other end of the through rod. Multiple hinge rods are rotatably connected to the hinge sleeve via pins. The end cover is inserted and installed above the processing furnace. Three material ports are opened on the end cover in a centrally symmetrical manner. Suspension rings are fixedly connected to the end cover at equal intervals. Fitting grooves are opened on both sides of the end cover.

[0011] The end cap has a slot in the wall of the fitting groove. A support cylinder is fixedly connected above the end cap. An opening slot is opened on one side of the support cylinder. An auxiliary electric push rod is fixedly installed above the opening slot on the support cylinder. A drive motor is fixedly installed above the support cylinder. The output shaft of the drive motor is connected to a connecting shaft. The connecting shaft is rotatably connected to the support cylinder through a bearing. A movable sleeve is slidably connected through the connecting shaft. Multiple toothed grooves are opened at equal intervals on the movable sleeve.

[0012] A spline block is fixedly connected to one end of the movable sleeve. A groove is provided below the spline block. A connecting rod is fixedly connected to the groove wall. A gear is rotatably connected to the connecting rod via a bearing. A traction plate is fixedly connected to the gear. A sliding groove is provided on the traction plate. The pushing mechanism includes a main electric push rod. The main electric push rod is fixedly connected to the processing furnace, and an arc-shaped strip is fixedly connected to the movable end of the main electric push rod. Wedge plates are fixedly connected to both ends of the arc-shaped strip, and a connecting strip is fixedly connected to the inclined surface of the wedge plate.

[0013] As a further embodiment of the present invention, the arc-shaped plate is located between the inner wall of the hollow column and the heat insulation cylinder, and the wall of the arc-shaped plate is in close contact with the inner wall of the hollow column and the outer wall of the heat insulation cylinder. Two protrusions are fixedly connected to the inner side of the arc-shaped plate, and the protrusions are in sliding cooperation with the inverted V-shaped groove and the arc-shaped groove.

[0014] As a further embodiment of the present invention, the placement rack includes a top plate, a lifting ring is fixedly connected above the top plate, and U-channel steel bars are fixedly connected to both sides below the top plate. Multiple placement plates are fixedly connected at equal intervals on the U-channel steel bars. The placement rack is inserted into a fixed frame, and support plates are fixedly connected to both sides of the fixed frame. The support plates slide in cooperation with the U-shaped groove of the U-channel steel bars.

[0015] As a further embodiment of the present invention, a fan is fixedly installed on one side of the support frame, a conveying pipe is fixedly connected to the fan, a plurality of heating wires are fixedly installed inside the conveying pipe, one end of the conveying pipe is connected to a connecting hole, the connecting hole is connected to an air outlet, the air outlet is fitted with a baffle, and a hinge seat is fixedly connected to the baffle, and one end of the hinge rod is rotatably connected to the hinge seat through a pin.

[0016] As a further embodiment of the present invention, the movable sleeve engages with the missing gear through multiple toothed grooves, the movable sleeve and the spline block are slidably connected through the support cylinder, the spline block and the spline groove are inserted into each other, the groove is fitted with the spherical block, one end of the return spring is fixedly connected to the fixed ring, and the other end of the return spring is fixedly connected to the I-shaped ring.

[0017] As a further embodiment of the present invention, the arc-shaped strip is in close contact with the outer wall of the processing furnace, and the processing furnace is fixedly connected to guide rods on both sides of the main electric push rod. The guide rods pass through the arc-shaped strip and are slidably connected to the arc-shaped strip. A connecting spring is sleeved on the guide rod. One end of the connecting spring is fixedly connected to the end of the guide rod, and the other end of the connecting spring is fixedly connected to the arc-shaped strip.

[0018] As a further embodiment of the present invention, through openings are provided at the top and bottom of the hollow plate, and an insert plate is slidably connected inside the hollow plate. The insert plate penetrates the hollow plate and is inserted into the slot. A wedge block is fixedly connected to the lower side of one side of the insert plate. The wedge block slides in the through opening below the hollow plate, and a connecting groove is provided on the inclined surface of the wedge block. The inclined surface of the wedge plate fits against the inclined surface of the wedge block. The connecting strip slides into the connecting groove and is T-shaped.

[0019] As a further embodiment of the present invention, limit grooves are provided on both sides of the connecting shaft, and limit strips are fixedly connected to both sides of the inner wall of the movable sleeve. The limit strips are slidably engaged with the limit grooves. A U-shaped frame is fixedly connected to the movable end of the auxiliary electric push rod. A fixing pin is fixedly connected inside the U-shaped groove of the U-shaped frame. The fixing pin is slidably engaged with the slide groove. The traction plate is slidably disposed inside the U-shaped groove of the U-shaped frame.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention starts the drive motor to rotate the connecting shaft, causing the connecting shaft to drive the movable sleeve to rotate synchronously. Utilizing the insertion and transmission of the spline block and spline groove, the heat insulation cylinder is driven to rotate stably. During the rotation of the heat insulation cylinder, the protrusion located in the arc-shaped groove gradually slides into the inverted V-shaped groove. This allows one side of the inverted V-shaped groove wall to push the protrusion, causing the arc-shaped plate to move upwards along the guide groove, along with the movable plate and the fixed frame. This causes the material inlet of the fixed frame to extend, allowing the heat-treated placement frame to be lifted out and a new placement frame to be processed to be installed. As the heat insulation cylinder continues to rotate, the other side of the inverted V-shaped groove wall pushes the protrusion, causing the protrusion to move the arc-shaped plate back down. This, in turn, causes the fixed frame and the assembled placement frame to move downwards, allowing the placement frame to be completely housed inside the furnace cavity of the processing furnace, thus achieving the placement of the workpiece into the furnace. The inverted V-shaped groove sequentially pushes the fixed frames at each workstation, causing the fixed frames at each workstation to rise and extend in sequence, completing the process. After being unloaded and loaded, the material falls back into the furnace. The three stations alternate in a cycle, enabling continuous multi-station heat treatment operations. During the loading and unloading process, the auxiliary electric push rod can be activated, pulling the U-shaped frame upward. This causes the traction plate to drive the missing gear to rotate around the connecting rod, causing the missing gear to drive the entire movable sleeve to move downward along the connecting shaft through tooth meshing. As the movable sleeve moves downward, the spline block can push the spherical block, causing the through rod to continue to move downward. During this process, the through rod compresses the return spring through the fixed ring, and multiple hinge rods on the hinged sleeve at one end of the through rod deflect synchronously. This causes multiple hinge rods to push against the corresponding baffles synchronously, causing multiple baffles to flip outward around the connecting pin, thereby adjusting the air volume of the air outlet. This adapts to the furnace temperature balance requirements during the workpiece loading and unloading process and station switching, effectively avoiding temperature fluctuations and uneven heating during workpiece heat treatment and loading and unloading, and improving the forming quality of workpiece heat treatment.

[0022] 2. This invention uses a lifting device, in conjunction with the suspension ring on the top of the end cover, to insert the end cover into the processing furnace, causing the hollow plate to embed into the fitting groove, thus completing the initial positioning of the processing furnace and the end cover. Then, by activating the main electric push rod, the main electric push rod pushes the arc-shaped strip to slide smoothly along the guide rod. During this process, the arc-shaped strip stretches the connecting spring on the guide rod, and drives the wedge plates fixed at both ends to move synchronously and in the same direction. As the wedge plates move with the arc-shaped strip, the inclined surface of the wedge plates can push the inclined surface of the wedge blocks, and cause the connecting strip on the wedge plates to slide along the connecting groove of the wedge blocks, so that the wedge blocks slide along the through-hole below the hollow plate, causing the insert plate to slide smoothly and extend horizontally inside the hollow plate, and then the end of the insert plate is inserted into the slots on both sides of the end cover, thus completing the locking and fixing of the end cover. This achieves rapid locking and sealing of the end cover and the processing furnace, with reliable operation, providing a stable environment for subsequent furnace heat treatment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the support frame structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the furnace used in this invention;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the display rack of the present invention;

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the hollow column of the present invention;

[0029] Figure 6 This is a schematic diagram of the cross-sectional structure of the heat insulation cylinder of the present invention;

[0030] Figure 7 This is a schematic diagram of the cross-sectional structure of the end cap of the present invention;

[0031] Figure 8 This is a schematic diagram of the cross-sectional structure of the connecting shaft and the movable sleeve of the present invention;

[0032] Figure 9 This is a schematic diagram of the cross-sectional structure of the hollow plate of the present invention;

[0033] Figure 10 This is a schematic diagram of the three-dimensional structure of the insert plate of the present invention.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Processing furnace; 101. Connecting pipe; 102. Burner; 103. Hollow plate; 104. Hollow column; 105. Connecting hole; 106. Air outlet; 107. Connecting pin; 108. Baffle; 109. Guide groove; 110. Movable plate; 111. Arc plate; 112. Fixing frame; 113. Protrusion; 114. Support strip; 115. Hinge seat; 116. Through-hole; 117. Insert plate; 118. Wedge block; 119. Connecting groove; 2. End cap; 201. Material inlet; 202. Suspension ring; 203. Fitting groove; 204. Slot; 3. Placement rack; 301. Top plate; 302. Lifting ring; 303. U-channel steel bar; 304. Placement plate; 4. Support frame; 401. Fan; 402. Conveying pipe; 403. Heating wire; 5. Pushing mechanism; 5 01. Main electric push rod; 502. Arc-shaped strip; 503. Wedge plate; 504. Connecting strip; 6. Heat insulation cylinder; 601. Spline groove; 602. Inverted V-shaped groove; 603. Arc-shaped groove; 604. I-shaped ring; 605. Through rod; 606. Spherical block; 607. Fixing ring; 608. Return spring; 609. Hinge sleeve; 610. Hinge rod; 7. Support cylinder; 701. Opening groove; 702. Auxiliary electric push rod; 703. Drive motor; 704. Connecting shaft; 705. Movable sleeve; 706. Gear groove; 707. Spline block; 708. Groove; 709. Connecting rod; 710. Gear missing; 711. Traction plate; 712. Slide groove; 8. Guide rod; 9. Connecting spring; 10. Limiting groove; 11. Limiting strip; 12. U-shaped frame; 13. Fixing pin. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0037] Please see Figures 1-10 The present invention provides a technical solution:

[0038] A continuous heat treatment device for automatic feeding of automobile wheel hub blanks includes a treatment furnace 1, an end cover 2, and a placement frame 3. A connecting pipe 101 is fixedly connected to one side of the treatment furnace 1. Multiple burners 102 are fixedly installed at equal intervals on the inner wall of the treatment furnace 1. A hollow column 104 is fixedly connected inside the treatment furnace 1, and a connecting hole 105 is opened at the bottom of the hollow column 104. A support frame 4 is fixedly connected to the bottom of the treatment furnace 1. A fan 401 is fixedly installed on one side of the support frame 4, and a conveying pipe is fixedly connected to the fan 401. 402, multiple heating wires 403 are fixedly installed inside the conveying pipe 402. One end of the conveying pipe 402 is connected to the connecting hole 105. Multiple air outlets 106 are equally spaced on the outer wall of the hollow column 104 located on the connecting hole 105. The connecting hole 105 is connected to the air outlets 106. A connecting pin 107 is fixedly connected to the hollow column 104 at the air outlet 106. A baffle 108 is rotatably connected to the hollow column 104 through the connecting pin 107. The air outlet 106 is fitted with the baffle 108.

[0039] The ambient temperature airflow delivered by the fan 401 to the inside of the conveying pipe 402 is continuously heated by the heating wire 403 to form high temperature hot air. The high temperature hot air then flows through the conveying pipe 402, the connecting hole 105 and the air outlet 106 in sequence, and is finally smoothly introduced into the furnace cavity of the processing furnace 1. It forms a synergistic heating effect with the radiant heating inside the furnace, improving the heating efficiency and temperature distribution uniformity inside the furnace. The connecting pipe 101 on one side of the processing furnace 1 is connected to an external exhaust pipe for exhaust.

[0040] The hollow column 104 has three vertical guide grooves 109 symmetrically arranged on its outer wall. A movable plate 110 is slidably connected through the guide grooves 109. An arc-shaped plate 111 is fixedly connected to one side of the movable plate 110, and a fixed frame 112 is fixedly connected to the other side of the movable plate 110. The placement rack 3 includes a top plate 301. A lifting ring 302 is fixedly connected above the top plate 301. U-channel steel bars 303 are fixedly connected to both sides below the top plate 301. Multiple placement plates 304 are fixedly connected at equal intervals on the U-channel steel bars 303. The entire placement rack 3 is inserted into the fixed frame 112 through an open top. Support strips 114 are fixedly connected to both sides of the fixed frame 112. The support strips 114 slide in cooperation with the U-shaped groove of the U-channel steel bars 303. By sliding the support strip 114 with the U-shaped groove of the U-channel steel strip 303, the insertion and assembly process of the placement frame 3 can be guided and limited, effectively restricting the shaking and misalignment of the placement frame 3.

[0041] A heat insulation cylinder 6 is rotatably installed inside the hollow column 104 via a bearing. The outer wall of the heat insulation cylinder 6 has two inverted V-shaped grooves 602 and an arc-shaped groove 603 distributed vertically, and the two ends of the inverted V-shaped groove 602 and the arc-shaped groove 603 are interconnected. An arc-shaped plate 111 is located between the inner wall of the hollow column 104 and the heat insulation cylinder 6, and the wall of the arc-shaped plate 111 is in close contact with the inner wall of the hollow column 104 and the outer wall of the heat insulation cylinder 6. Two protrusions 113 are fixedly connected to the inner side of the arc-shaped plate 111, and the protrusions 113 slide in cooperation with the inverted V-shaped groove 602 and the arc-shaped groove 603. Through the sliding engagement of the protrusion 113 with the inverted V-shaped groove 602 and the arc-shaped groove 603, the heat insulation cylinder 6 can achieve continuous lifting of the fixed frame 112 at each work station during rotation using the inverted V-shaped groove 602. During the lifting and moving of the fixed frame 112, the movable plate 110 can slide along the guide groove 109, while the arc-shaped plate 111 fits against the inner wall of the hollow column 104 and the outer wall of the heat insulation cylinder 6 to perform synchronous lifting and moving displacement, thereby guiding and restricting movement and preventing skew.

[0042] Below the heat insulation cylinder 6, an I-shaped ring 604 is rotatably connected via a bearing. A through rod 605 is slidably connected through the I-shaped ring 604. A spherical block 606 is fixedly connected to one end of the through rod 605. A fixing ring 607 is fixedly connected to the through rod 605. The fixing ring 607 slides against the inner wall of the heat insulation cylinder 6. A return spring 608 is sleeved below the fixing ring 607 on the through rod 605. One end of the return spring 608 is fixedly connected to the fixing ring 607, and the other end of the return spring 608 is fixedly connected to the I-shaped ring 604. A hinge sleeve 609 is fixedly connected to the other end of the through rod 605. Multiple hinge rods 610 are rotatably connected to the hinge sleeve 609 via pins. A hinge seat 115 is fixedly connected to the baffle 108. One end of the hinge rod 610 is rotatably connected to the hinge seat 115 via a pin.

[0043] When the through rod 605 slides vertically downward under the downward pressure, it will drive the fixed ring 607 to move down synchronously and squeeze the return spring 608. Then, the return spring 608 will help the through rod 605 to return to its original position. When the through rod 605 slides up and down, the multiple hinge rods 610 on the hinge sleeve 609 will deflect synchronously, thereby pulling the multiple baffles 108 to rotate, thereby adjusting the opening and closing degree of the air outlet 106 and realizing the adjustment of the hot air volume.

[0044] End cap 2 is inserted and installed above processing furnace 1. Support cylinder 7 is fixedly connected above end cap 2. An opening slot 701 is opened on one side of support cylinder 7. Connecting rod 709 is fixedly connected to the wall of opening slot 701. Gear 710 is rotatably connected to connecting rod 709 through bearing. Traction plate 711 is fixedly connected to gear 710. Sliding groove 712 is opened on traction plate 711. Auxiliary electric push rod 702 is fixedly installed above opening slot 701 on support cylinder 7. U-shaped frame 12 is fixedly connected to the movable end of auxiliary electric push rod 702. Fixing pin 13 is fixedly connected in the U-shaped groove of U-shaped frame 12. Fixing pin 13 slides with sliding groove 712. Traction plate 711 is slidably set in the U-shaped groove of U-shaped frame 12.

[0045] A drive motor 703 is fixedly installed above the support cylinder 7. The output shaft of the drive motor 703 is connected to a connecting shaft 704. The connecting shaft 704 is rotatably connected to the support cylinder 7 via bearings. A movable sleeve 705 is slidably connected through the connecting shaft 704. Limiting grooves 10 are opened on both sides of the connecting shaft 704. Limiting strips 11 are fixedly connected to both sides of the inner wall of the movable sleeve 705. The limiting strips 11 and the limiting grooves 10 are slidably engaged. Multiple toothed grooves 706 are evenly spaced on the movable sleeve 705. The movable sleeve 705 meshes with a gear 710 through the multiple toothed grooves 706. A spline block 707 is fixedly connected to one end of the movable sleeve 705. A groove 708 is opened below the spline block 707. The movable sleeve 705 and the spline block 707 are slidably connected through the support cylinder 7. A spline groove 601 is opened on the heat insulation cylinder 6. The spline block 707 and the spline groove 601 are inserted into each other. The groove 708 is fitted with the spherical block 606.

[0046] The auxiliary electric push rod 702 drives the U-shaped frame 12 to reciprocate vertically. The fixed pin 13 and the slide groove 712 are slidably connected, so the fixed pin 13 can push the traction plate 711, thereby driving the missing gear 710 to rotate around the connecting rod 709. The missing gear 710 can push the tooth groove 706, causing the movable sleeve 705 to slide smoothly along the connecting shaft 704. During the process, the limiting strip 11 can slide in the limiting groove 10, thereby guiding the movable sleeve 705 through the limiting groove 10 to prevent movement and deviation.

[0047] Three material inlets 201 are centrally symmetrically provided on the end cap 2. Suspension rings 202 are fixedly connected to the end cap 2 at equal intervals. Fitting grooves 203 are provided on both sides of the end cap 2. Slots 204 are provided on the end cap 2 at the groove wall of the fitting grooves 203. Hollow plates 103 are fixedly connected to both sides above the processing furnace 1. Through openings 116 are provided on the top and bottom of the hollow plates 103. Insert plates 117 are slidably connected inside the hollow plates 103. Insert plates 117 penetrate the hollow plates 103 and are inserted into the slots 204. A wedge block 118 is fixedly connected to the lower side of one side of the insert plate 117. The wedge block 118 slides in the through opening 116 below the hollow plates 103. A connecting groove 119 is provided on the inclined surface of the wedge block 118.

[0048] A top-pushing mechanism 5 is fixedly installed on the outer wall of the processing furnace 1. The top-pushing mechanism 5 includes a main electric push rod 501, which is fixedly connected to the processing furnace 1. An arc-shaped strip 502 is fixedly connected to the movable end of the main electric push rod 501. The arc-shaped strip 502 is in close contact with the outer wall of the processing furnace 1. Guide rods 8 are fixedly connected to both sides of the main electric push rod 501. The guide rods 8 pass through the arc-shaped strip 502 and are slidably connected to the arc-shaped strip 502. A connecting spring 9 is sleeved on the guide rod 8. One end of the connecting spring 9 is fixedly connected to the end of the guide rod 8, and the other end of the connecting spring 9 is fixedly connected to the arc-shaped strip 502. Wedge plates 503 are fixedly connected to both ends of the arc-shaped strip 502. A connecting strip 504 is fixedly connected to the inclined surface of the wedge plate 503. The inclined surface of the wedge plate 503 is in contact with the inclined surface of the wedge block 118. The connecting strip 504 and the connecting groove 119 are slidably engaged and are both T-shaped designs.

[0049] When the main electric push rod 501 pushes and pulls the arc-shaped bar 502, the arc-shaped bar 502 will slide along the guide rod 8 and simultaneously press and pull the connecting spring 9, thereby guiding it through the guide rod 8 to ensure the smooth movement of the arc-shaped bar 502. When the wedge plate 503 moves upward and pushes the wedge block 118 through the inclined surface, the T-shaped connecting strip 504 can slide in the connecting groove 119, thereby restricting the wedge plate 503 and the wedge block 118 through the connecting strip 504 to prevent deviation and separation.

[0050] Working principle of this invention:

[0051] Before operation, the end cover 2 is inserted into the processing furnace 1 using a lifting device and the suspension ring 202 on the top of the end cover 2, so that the hollow plate 103 is embedded in the fitting groove 203, thus completing the initial positioning of the processing furnace 1 and the end cover 2. Then, the main electric push rod 501 is started, so that the main electric push rod 501 pushes the arc strip 502 to slide smoothly along the guide rod 8. During the process, the arc strip 502 stretches the connecting spring 9 on the guide rod 8, and drives the wedge plates 503 fixed at both ends to move synchronously and in the same direction. When the wedge plate 503 moves with the arc strip 502, the inclined surface of the wedge plate 503 can push the inclined surface of the wedge block 118.

[0052] And the connecting strip 504 on the wedge plate 503 slides along the connecting groove 119 of the wedge block 118, so that the wedge block 118 slides along the through hole 116 below the hollow plate 103, causing the insert plate 117 to slide smoothly and extend horizontally inside the hollow plate 103, and then the end of the insert plate 117 is inserted into the slots 204 on both sides of the end cover 2, thereby completing the locking and fixing of the end cover 2. Then the auxiliary electric push rod 702 is activated, so that the auxiliary electric push rod 702 pulls the U-shaped frame 12 upward. During the process, the fixing pin 13 on the U-shaped frame 12 slides along the slide groove 712 and pushes the groove wall, thereby causing the traction plate 711 to drive the missing gear 710 to rotate around the connecting rod 709.

[0053] The missing gear 710 drives the movable sleeve 705 to move downward along the connecting shaft 704 through tooth meshing. As the movable sleeve 705 moves downward, the spline block 707 gradually inserts into the spline groove 601 at the top of the heat insulation cylinder 6, realizing the torque linkage between the movable sleeve 705 and the heat insulation cylinder 6. At this time, the drive motor 703 is started to rotate the connecting shaft 704, so that the connecting shaft 704 drives the movable sleeve 705 to rotate synchronously through the sliding cooperation of the limiting groove 10 and the limiting strip 11. Then, through the insertion and transmission of the spline block 707 and the spline groove 601, the heat insulation cylinder 6 is driven to rotate stably. During the rotation of the heat insulation cylinder 6, the protrusion 113 located in the arc groove 603 gradually slides into the inverted V-shaped groove 602.

[0054] This allows one side of the inverted V-shaped groove 602 to push against the protrusion 113, causing the arc plate 111 to move upward along the guide groove 109, along with the movable plate 110 and the fixed frame 112. This causes the material inlet 201 of the fixed frame 112 to extend out. At this point, the lifting equipment, along with the lifting ring 302 at the top of the placement frame 3, inserts the placement frame 3 into the fixed frame 112, allowing the support strip 114 to be inserted into the U-shaped groove on the U-channel steel strip 303, thus completing the fixing of the placement frame 3. Then, the heat insulation cylinder 6 continues to rotate, causing the other side of the inverted V-shaped groove 602 to push against the protrusion 113, causing the protrusion 113 to move the arc plate 111 back down, thereby causing the movable plate 110, the fixed frame 112, and the assembled placement frame 3 to move downward smoothly as a whole.

[0055] The placement rack 3 is completely retracted into the furnace cavity of the processing furnace 1, so that the workpiece is placed in the furnace. This allows the heat insulation cylinder 6 to rotate one revolution to complete the assembly of the placement rack 3 at the three workstations. Finally, the drive motor 703 is turned off and the inverted V-shaped groove 602 is positioned behind the two fixed frames 112, so that multiple protrusions 113 are kept in the arc groove 603. At this time, the top plate 301 above the placement rack 3 forms a closed shield against the three material ports 201 of the end cover 2. During operation, combustible gas is introduced through the gas supply pipe connected to the burner 102. After ignition, it radiates heat into the interior of the processing furnace 1. At the same time, the fan 401 on one side of the support frame 4 and the electric heating wire 403 inside the conveying pipe 402 are started. The fan 401 draws in the outside air and delivers it into the conveying pipe 402.

[0056] The airflow is heated by the electric heating wire 403 to form high-temperature hot air. The high-temperature hot air is introduced into the hollow column 104 through the connecting hole 105 at the bottom of the hollow column 104. During the process, the U-shaped frame 12 is pulled upward by the auxiliary electric push rod 702. The movable sleeve 705 and spline block 707 are driven downward by the meshing transmission, so that the spherical block 606 is engaged with the groove 708. The spline block 707 can push the spherical block 606 to make the through rod 605 continue to move downward. During the process, the through rod 605 compresses the return spring 608 through the fixing ring 607.

[0057] Meanwhile, multiple hinge rods 610 on the hinge sleeve 609 at one end of the through rod 605 deflect synchronously, thereby causing multiple hinge rods 610 to push against the corresponding baffles 108 synchronously, causing multiple baffles 108 to flip outward around the connecting pin 107 synchronously, thereby adjusting the air volume of the air outlet 106. After the heat treatment is completed, the drive motor 703 is started to drive the heat insulation cylinder 6 to rotate, and pushes against the fixed frame 112 at each station in sequence through the inverted V-shaped groove 602, so that the fixed frame 112 and the placement frame 3 carrying the heat-treated workpiece are raised as a whole, so that the placement frame 3 is gradually pushed out from the material port 201 of the end cover 2, realizing the staggered exit of multi-station workpieces from the furnace and the loading of materials.

Claims

1. A continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks, comprising a treatment furnace (1), an end cover (2), and a placement rack (3), characterized in that: A connecting pipe (101) is fixedly connected to one side of the processing furnace (1). Multiple burners (102) are fixedly installed at equal intervals on the inner wall of the processing furnace (1). Hollow plates (103) are fixedly connected to both sides above the processing furnace (1). A support frame (4) is fixedly connected to the bottom of the processing furnace (1). A push mechanism (5) is fixedly installed on the outer wall of the processing furnace (1). A hollow column (104) is fixedly connected inside the processing furnace (1). A connecting hole (105) is provided below the hollow column (104). Multiple air outlets (106) are provided at equal intervals on the outer wall of the hollow column (104) at the connecting hole (105). A connecting pin (107) is fixedly connected to the air outlet (106) of the hollow column (104). A baffle (108) is rotatably connected to the hollow column (104) through the connecting pin (107). Three guide grooves (109) are provided on the outer wall of the hollow column (104) in a centrally symmetrical manner along the axis. A movable plate (110) is slidably connected through the guide groove (109). An arc plate (111) is fixedly connected to one side of the movable plate (110). A fixed frame (112) is fixedly connected to the other side of the movable plate (110). A heat insulation cylinder (6) is rotatably installed inside the hollow column (104) through a bearing. A spline groove (601) is provided on the heat insulation cylinder (6). Two inverted V-shaped grooves (602) and an arc-shaped groove (603) are provided on the outer wall of the heat insulation cylinder (6) in an up-down distribution manner. The two ends of the inverted V-shaped groove (602) and the arc-shaped groove (603) are connected to each other. An I-shaped ring (604) is rotatably connected to the bottom of the heat insulation cylinder (6) through a bearing. A through rod (605) is slidably connected through the I-shaped ring (604). A spherical block (606) is fixedly connected to one end of the through rod (605). A fixing ring (607) is fixedly connected to the through rod (605). A return spring (608) is sleeved below the fixing ring (607) on the through rod (605). A hinge sleeve (609) is fixedly connected to the other end of the through rod (605). Multiple hinge rods (610) are rotatably connected to the hinge sleeve (609) via pins. The end cover (2) is inserted and installed above the processing furnace (1). Three material ports (201) are provided on the end cover (2) in a centrally symmetrical manner. Suspension rings (202) are fixedly connected to the end cover (2) at equal intervals. Fitting grooves (203) are provided on both sides of the end cover (2). The end cap (2) has a slot (204) on the wall of the fitting groove (203). A support cylinder (7) is fixedly connected above the end cap (2). An opening slot (701) is opened on one side of the support cylinder (7). An auxiliary electric push rod (702) is fixedly installed above the opening slot (701) of the support cylinder (7). A drive motor (703) is fixedly installed above the support cylinder (7). The output shaft of the drive motor (703) is connected to a connecting shaft (704). The connecting shaft (704) is rotatably connected to the support cylinder (7) through a bearing. A movable sleeve (705) is slidably connected through the connecting shaft (704). Multiple toothed grooves (706) are opened at equal intervals on the movable sleeve (705). One end of the movable sleeve (705) is fixedly connected to a spline block (707), and a groove (708) is provided below the spline block (707). A connecting rod (709) is fixedly connected to the wall of the opening groove (701). A missing gear (710) is rotatably connected to the connecting rod (709) through a bearing. A traction plate (711) is fixedly connected to the missing gear (710). A sliding groove (712) is provided on the traction plate (711). The pushing mechanism (5) includes a main electric push rod (501). The main electric push rod (501) is fixedly connected to the processing furnace (1), and an arc strip (502) is fixedly connected to the movable end of the main electric push rod (501). Wedge plates (503) are fixedly connected to both ends of the arc strip (502). A connecting strip (504) is fixedly connected to the inclined surface of the wedge plate (503).

2. The continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks according to claim 1, characterized in that: The arc plate (111) is located between the inner wall of the hollow column (104) and the heat insulation cylinder (6), and the wall of the arc plate (111) is in close contact with the inner wall of the hollow column (104) and the outer wall of the heat insulation cylinder (6). Two protrusions (113) are fixedly connected to the inner side of the arc plate (111), and the protrusions (113) are in sliding cooperation with the inverted V-shaped groove (602) and the arc groove (603).

3. The continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks according to claim 1, characterized in that: The placement rack (3) includes a top plate (301), a lifting ring (302) is fixedly connected above the top plate (301), and U-channel steel bars (303) are fixedly connected on both sides below the top plate (301). Multiple placement plates (304) are fixedly connected at equal intervals on the U-channel steel bars (303). The placement rack (3) is inserted into a fixed frame (112), and support plates (114) are fixedly connected on both sides of the fixed frame (112). The support plates (114) slide in cooperation with the U-shaped groove of the U-channel steel bars (303).

4. The continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks according to claim 1, characterized in that: A fan (401) is fixedly installed on one side of the support frame (4). A conveying pipe (402) is fixedly connected to the fan (401). Multiple heating wires (403) are fixedly installed inside the conveying pipe (402). One end of the conveying pipe (402) is connected to the connecting hole (105). The connecting hole (105) is connected to the air outlet (106). The air outlet (106) is fitted with the baffle (108). A hinge seat (115) is fixedly connected to the baffle (108). One end of the hinge rod (610) is rotatably connected to the hinge seat (115) through a pin.

5. The continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks according to claim 1, characterized in that: The movable sleeve (705) meshes with the missing gear (710) through multiple toothed grooves (706). The movable sleeve (705) and the spline block (707) slide through the support cylinder (7) and are connected to the support cylinder (7). The spline block (707) is inserted into the spline groove (601). The groove (708) is fitted into the spherical block (606). One end of the return spring (608) is fixedly connected to the fixed ring (607), and the other end of the return spring (608) is fixedly connected to the I-shaped ring (604).

6. The continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks according to claim 1, characterized in that: The arc-shaped strip (502) is in close contact with the outer wall of the processing furnace (1), and the processing furnace (1) is fixedly connected to the guide rods (8) on both sides of the main electric push rod (501). The guide rods (8) pass through the arc-shaped strip (502) and are slidably connected to the arc-shaped strip (502). A connecting spring (9) is sleeved on the guide rod (8). One end of the connecting spring (9) is fixedly connected to the end of the guide rod (8), and the other end of the connecting spring (9) is fixedly connected to the arc-shaped strip (502).

7. The continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks according to claim 1, characterized in that: The hollow plate (103) has through openings (116) at both the top and bottom. A plug plate (117) is slidably connected inside the hollow plate (103). The plug plate (117) penetrates the hollow plate (103) and is inserted into the slot (204). A wedge block (118) is fixedly connected to the lower side of one side of the plug plate (117). The wedge block (118) slides in the through opening (116) below the hollow plate (103). A connecting groove (119) is provided on the inclined surface of the wedge block (118). The inclined surface of the wedge plate (503) fits against the inclined surface of the wedge block (118). The connecting strip (504) slides into the connecting groove (119) and is T-shaped.

8. The continuous heat treatment apparatus for automatic feeding of automobile wheel hub blanks according to claim 1, characterized in that: Limiting grooves (10) are provided on both sides of the connecting shaft (704). Limiting strips (11) are fixedly connected to both sides of the inner wall of the movable sleeve (705). The limiting strips (11) and the limiting grooves (10) are slidably engaged. A U-shaped frame (12) is fixedly connected to the movable end of the auxiliary electric push rod (702). A fixing pin (13) is fixedly connected in the U-shaped groove of the U-shaped frame (12). The fixing pin (13) and the sliding groove (712) are slidably engaged. The traction plate (711) is slidably arranged in the U-shaped groove of the U-shaped frame (12).

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