A conveying device for heat treatment of automobile drive shaft

Abstract

The present invention relates to the technical field of drive shaft processing, and discloses a conveying device for heat treatment of automobile drive shafts. The present invention comprises: a conveying mechanism for conveying the drive shaft and a quenching mechanism for heating and cooling the drive shaft, wherein the conveying mechanism is provided with a plurality of retractable and movable limiting frames, wherein the limiting frames comprise a slide bar and two shaft frames arranged on the slide bar for placing and limiting the drive shaft, so that the conveying mechanism can not only stably convey the drive shaft, but also does not affect the quenching of the drive shaft by the quenching mechanism; the quenching mechanism comprises an induction heating coil arranged above the conveying mechanism and capable of lateral movement, and a push rod for limiting the axial movement of the drive shaft. The present invention improves the conveying mechanism and combines it with the quenching mechanism, so that the heat treatment process of the drive shaft can be automated and streamlined, thereby improving its quenching efficiency while ensuring the quenching effect of the drive shaft.

Description

Technical Field

[0001] The invention relates to the technical field of drive shaft processing, in particular to a conveying device used for heat treatment of automobile drive shafts. Background Art

[0002] The drive shaft of a new energy electric vehicle is an important component in the transmission system of an electric vehicle. Its main function is to transmit the torque and speed generated by the motor to the drive wheels so that the vehicle can move. The drive shaft is usually composed of one or more half shafts of equal length, which distribute power to the left and right wheels. In order to improve the mechanical properties and service life of the drive shaft, these drive shafts need to be heat treated before assembly, and the quenching process is a type of heat treatment. Through the quenching treatment, the organizational structure of the drive shaft will change to form a martensite or bainite structure, thereby improving its hardness, strength, wear resistance and fatigue strength.

[0003] At present, in order to ensure the quenching effect of the drive shaft, it is generally heated by an induction heating coil and then cooled by spraying water to ensure that the quenching is more comprehensive and detailed. The specific process is generally to first insert the drive shaft to be quenched into the quenching position, and then quench it by lifting the induction heating coil and spraying water to cool it.

[0004] However, although this method has a better quenching effect, the deployment of the drive shaft before quenching and the discharge transfer after quenching are relatively inconvenient. Most of the operations still rely on manpower, and a process-based process cannot be realized, resulting in the quenching efficiency of the drive shaft cannot be effectively improved. Therefore, it is necessary to propose a conveying equipment for heat treatment of automobile drive shafts. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a conveying device for heat treatment of automobile drive shafts.

[0006] The present invention is implemented by the following technical solutions: a conveying mechanism for conveying a driving shaft and a quenching mechanism for heating and cooling the driving shaft, the conveying mechanism is provided with a plurality of telescopically movable limiting frames, the limiting frames include a slide bar and two shaft frames provided on the slide bar for placing and limiting the driving shaft, so that the conveyor can stably convey the driving shaft, and at the same time, the quenching mechanism can not be affected to quench the driving shaft;

[0007] The quenching mechanism includes an induction heating coil arranged above the conveying mechanism and capable of lateral movement, and a push rod for limiting the axial movement of the driving shaft. A water spray ring is arranged on the induction heating coil, and a limiting cylinder is arranged at one end of the water spray ring. Four limiting wheels for limiting the driving shaft are arranged in the limiting cylinder, and a magnet for adsorbing the limiting frame is arranged at the other end of the water spray ring, so that when the conveying mechanism drives the driving shaft to be quenched to move to the quenching mechanism, the quenching mechanism pushes the limiting frame away through lateral movement and replaces the limiting frame to be sleeved on the driving shaft for quenching.

[0008] As a further improvement of the above scheme, the conveying mechanism includes a frame, two pairs of transmission wheels rotatably mounted on the frame, a conveying chain sleeved on the two pairs of transmission wheels, and a first motor for driving the transmission wheels, and the conveying chain is formed by a plurality of articulated slide rails.

[0009] As a further improvement of the above scheme, a cross frame is arranged on the top of the frame, and a moving mechanism that can drive the quenching mechanism to move is arranged on the cross frame. The moving mechanism includes a screw rotatably installed on the cross frame and a second motor for driving the screw. The threaded sleeve on the screw is provided with a connecting block connected to the induction heating coil, and the top rod is fixedly connected to the cross frame.

[0010] As a further improvement of the above solution, two guard plates are provided on both sides of the frame to limit the axial position of the drive shaft so that it can be smoothly transported to the quenching mechanism without colliding with the water spray ring or the push rod during transportation.

[0011] As a further improvement of the above solution, brackets are provided on both sides of the interior of the frame, so that the bottom of the conveyor chain at the top can be supported by the two brackets to prevent it from sagging and causing the drive shaft position to be unable to correspond to the quenching mechanism.

[0012] As a further improvement of the above solution, two rollers are provided at the bottom of the slide rail, so that when the bracket supports the conveyor chain, friction will not cause wear on both.

[0013] As a further improvement of the above solution, a plurality of first pulleys are arranged on the shaft frame of the limiting frame, so that the limiting frame will not cause scratches on the driving shaft when moving, and the shaft frame of the limiting frame will not be restricted by the step shaft when moving.

[0014] As a further improvement of the above scheme, a second roller is provided at one end of the push rod, so that when the drive shaft follows the movement of the conveying mechanism, even if there is an error in the axial position of the drive shaft causing one end thereof to overflow the push rod, it can still smoothly pass over the push rod under the guidance of the second roller.

[0015] As a further improvement of the above scheme, a bayonet is provided at the bottom of the slide rail, a groove is provided on the limiting frame, a clamping block and a spring are provided in the groove, and the bottom end of the clamping block extends into the bayonet and is engaged with the bayonet, so that the quenching mechanism can push the limiting frame normally when quenching the drive shaft, and can drive the limiting frame to reset normally through the magnet during resetting and perform limiting during resetting.

[0016] As a further improvement of the above solution, a water receiving box is provided in the frame, and the water receiving box is located directly below the quenching mechanism to receive the sprayed cooling waste water.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting a limiting frame on the conveying mechanism and matching the quenching mechanism with the improved conveying mechanism, the automatic process heat treatment operation of the drive shaft can be realized, which can not only realize the conveying of the drive shaft, but also can perform quenching treatment on it during the conveying process, thereby improving the heat treatment efficiency of the drive shaft. At the same time, the quenching mechanism cooperates with the conveying mechanism, which can not only ensure the stability of the drive shaft during conveying and quenching, but also realize all-round stable quenching, so that the conveying mechanism will not limit the heat treatment of the drive shaft, thereby ensuring the quenching effect;

[0019] When the quenching mechanism quenches the drive shaft, in order to quench the drive shaft in all directions, it will push away the limiting frame used to support the drive shaft, so that the drive shaft cannot be fixed. Therefore, in order to solve this problem, a limiting cylinder is provided on the quenching mechanism, and a limiting wheel is provided in the limiting cylinder, so that when the quenching mechanism pushes the limiting frame away, the limiting cylinder will also synchronously cover the drive shaft, so as to achieve synchronous limitation, and this method will not affect the normal quenching of the drive shaft, so that not only the all-round quenching of the drive shaft is satisfied, but also the stability of the drive shaft during the quenching process can be ensured;

[0020] By arranging a limiting structure composed of a block, a spring, a bayonet and other structures on the slide rail and the limiting frame, and arranging a magnet on the quenching mechanism, the quenching mechanism can not only drive the limiting frame to normally extend and retract and reset when the driving shaft is normally quenched, but also will not affect the normal transportation of the driving shaft by the conveying mechanism. Moreover, the limiting frame can also be limited after the limiting frame is reset to prevent it from sliding when following the transmission of the conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall display diagram of the conveying equipment used for heat treatment of automobile drive shafts of the present invention;

[0022] Figure 2This is a disassembly display diagram of the conveying equipment used for heat treatment of automobile drive shafts of the present invention;

[0023] Figure 3 It is an operation display diagram of the conveying equipment for heat treatment of automobile drive shaft of the present invention;

[0024] Figure 4 This is a disassembled display diagram of the conveying equipment for heat treatment of automobile drive shafts of the present invention;

[0025] Figure 5 It is a diagram showing the cross frame and quenching mechanism;

[0026] Figure 6 It is a diagram showing the quenching mechanism;

[0027] Figure 7 The first display diagram and partial enlarged diagram of the slide rail and the limiting frame of the conveyor chain;

[0028] Figure 8 A second display diagram of the slide rail and the limiting frame of the conveyor chain;

[0029] Fig. 9 It is a planar cross-sectional view and a partial enlarged view of the slide rail and the limiting frame of the conveyor chain.

[0030] Description of main symbols:

[0031] 1. Frame; 2. First motor; 3. Drive wheel; 4. Conveyor chain; 401. Slide rail; 402. Limiting frame; 403. First pulley; 5. Cross frame; 6. Second motor; 7. Screw; 8. Induction heating coil; 9. Water spray ring; 10. Limiting cylinder; 11. Limiting wheel; 12. Magnet; 13. Push rod; 14. Second roller; 15. Guard plate; 16. Bracket; 17. Roller; 18. Groove; 19. Block; 20. Spring; 21. Bayonet; 22. Water receiving tank. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Please combine Figures 1 to 9, a conveying device for heat treatment of automobile drive shafts, comprising: a conveying mechanism and a quenching mechanism, the conveying mechanism is used to convey and transfer the drive shaft, so as to automate the heat treatment of the drive shaft, the quenching mechanism can heat and cool the drive shaft, so as to achieve heat treatment of the drive shaft, the conveying mechanism comprises a frame 1, two pairs of transmission wheels 3 rotatably mounted on the frame 1, a conveying chain 4 sleeved on the two pairs of transmission wheels 3 and a first motor 2 for driving the transmission wheels 3, the conveying chain 4 is hinged by a plurality of slide rails 401, a plurality of telescopically movable limiting frames 402 are arranged on the conveying mechanism, the limiting frame 402 comprises a slide bar and two shaft frames arranged on the slide bar for placing and limiting the drive shaft, so that the conveying mechanism can stably convey the drive shaft, and at the same time will not affect the quenching of the drive shaft by the quenching mechanism, a plurality of first pulleys 403 are arranged on the shaft frame of the limiting frame 402, so that the limiting frame 402 will not cause scratches on the drive shaft when moving, and the shaft frame of the limiting frame 402 is not restricted by the step shaft when moving;

[0034] A cross frame 5 is arranged on the top of the frame 1, and a moving mechanism capable of driving the quenching mechanism to move is arranged on the cross frame 5, and the moving mechanism comprises a screw rod 7 rotatably mounted on the cross frame 5 and a second motor 6 for driving the screw rod 7, a connecting block connected to the induction heating coil 8 is threadedly sleeved on the screw rod 7, and a top rod 13 is fixedly connected to the cross frame 5;

[0035] The quenching mechanism includes an induction heating coil 8 arranged on a connecting block, the induction heating coil 8 consists of a heater and a coil, a water spray ring 9 is arranged on the induction heating coil 8, the water spray ring 9 consists of two annular nozzles and a plurality of connecting pipes, and one of the annular nozzles is provided with a water inlet for connecting a water supply pipe, a limiting cylinder 10 is arranged at one end of the water spray ring 9, four limiting wheels 11 for limiting the drive shaft are arranged in the limiting cylinder 10, and a magnet 12 for adsorbing the limiting frame 402 is arranged at the other end of the water spray ring 9, and the cross frame 5 is provided with a push rod 13 for limiting the axial movement of the driving shaft, and a second roller 14 is provided at one end of the push rod 13, so that when the driving shaft moves with the conveying mechanism, even if there is an error in the axial position of the driving shaft causing one end thereof to overflow the push rod 13, it can smoothly pass over the push rod 13 under the guidance of the second roller 14, so that when the conveying mechanism drives the driving shaft to be quenched to move to the quenching mechanism, the quenching mechanism pushes the limiting frame 402 away through lateral movement and replaces the limiting frame 402 to be sleeved on the driving shaft for quenching.

[0036] Through the above technical solution, the automated process heat treatment operation of the drive shaft can be realized, which can not only realize the transportation of the drive shaft, but also can perform quenching treatment on it during the transportation process, thereby improving the heat treatment efficiency of the drive shaft. At the same time, the quenching mechanism cooperates with the conveying mechanism, which can not only ensure the stability of the drive shaft during transportation and quenching, but also realize all-round stable quenching, so that the conveying mechanism will not limit the heat treatment of the drive shaft, thereby ensuring the quenching effect;

[0037] When the quenching mechanism quenches the drive shaft, in order to quench the drive shaft in all directions, it will push away the limiting frame 402 used to support the drive shaft, thereby making it impossible for the drive shaft to remain fixed. Therefore, in order to solve this problem, a limiting cylinder 10 is provided on the quenching mechanism, and a limiting wheel 11 is provided in the limiting cylinder 10, so that when the quenching mechanism pushes the limiting frame 402 away, the limiting cylinder 10 will also synchronously sleeve the drive shaft, thereby realizing synchronous limitation, and this method will not affect the normal quenching of the drive shaft, thereby not only meeting the all-round quenching of the drive shaft, but also ensuring the stability of the drive shaft during the quenching process.

[0038] Two guard plates 15 are provided on both sides of the frame 1, so as to limit the axial position of the drive shaft so that it can be smoothly transported to the quenching mechanism without colliding with the water spray ring 9 or the push rod 13 during transportation.

[0039] Brackets 16 are provided on both sides of the interior of the frame 1, so that the bottom of the conveyor chain 4 at the top can be supported by the two brackets 16 to prevent it from sagging and causing the position of the driving shaft to be unable to correspond to the quenching mechanism. Two rollers 17 are provided at the bottom of the slide rail 401, so that when the bracket 16 supports the conveyor chain 4, friction will not cause wear on both.

[0040] A bayonet 21 is provided at the bottom of the slide rail 401, and a groove 18 is provided on the limiting frame 402. A block 19 and a spring 20 are slidably provided in the groove 18. The bottom end of the block 19 extends into the bayonet 21 and is engaged with the bayonet 21, so that the quenching mechanism can push the limiting frame 402 normally when quenching the driving shaft, and can drive the limiting frame 402 to reset normally through the magnet 12 during resetting and limit it during resetting.

[0041] Through the above technical solution, when the quenching mechanism is normally quenching the drive shaft, it can not only push the limiting frame 402, but also drive it to shrink and reset through the magnet 12, and it will not affect the normal transportation of the drive shaft by the conveying mechanism. At the same time, the limiting frame 402 can be limited after it is reset to avoid sliding when following the transmission of the conveying mechanism.

[0042] A water receiving box 22 is provided in the frame 1, and a drainage pipe is provided at one end of the water receiving box 22. The water receiving box 22 is located directly below the quenching mechanism to receive the sprayed cooling waste water.

[0043] The implementation principle of a conveying device for heat treatment of an automobile drive shaft in the embodiment of the present application is:

[0044] This device can be used alone or in conjunction with other devices for conveying the drive shaft. Then, the water inlet on the water spray ring 9 is connected to the external water supply pipe;

[0045] When in use, the drive shaft to be quenched is placed on the limiting frame 402 on the conveying chain 4, and the conveying mechanism conveys the drive shaft through the conveying chain 4 until the drive shaft is conveyed to the quenching mechanism;

[0046] The moving mechanism drives the quenching mechanism to move, and the quenching mechanism pushes the limiting frame 402 through the water spray ring 9. During this process, the driving shaft is limited by the push rod 13 and remains limited in place. The magnet 12 on the water spray ring 9 is attached to the limiting frame 402, and the block 19 is withdrawn from the bayonet 21. The quenching mechanism begins to be sleeved on the driving shaft, and during this process, the induction heating coil 8 and the water spray ring 9 are started to quench the driving shaft. When the limiting frame 402 moves away and cannot support the other end of the driving shaft, the other end of the driving shaft extends into the limiting cylinder 10, thereby supporting the driving shaft through the limiting wheel 11, so as to keep the driving shaft stable, so that the quenching mechanism can quench the driving shaft in an all-round way without blind spots, and at the same time will not affect the stability of the driving shaft.

[0047] When the quenching of the drive shaft is completed, the moving mechanism drives the quenching mechanism to reset. During this process, the magnet 12 drives the limiting frame 402 to shrink and reset until the block 19 is re-engaged in the bayonet 21. Then, the conveying mechanism drives the quenched drive shaft forward, and the unquenched drive shaft at the back enters the quenching area to wait for subsequent quenching. This process is repeated to realize the process-automated heat treatment of the drive shaft.

[0048] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A conveying device for heat treatment of automobile drive shafts, comprising: A conveying mechanism for conveying a driving shaft and a quenching mechanism for heating and cooling the driving shaft, characterized in that: The conveying mechanism comprises a frame (1), two pairs of transmission wheels (3) rotatably mounted on the frame (1), a conveying chain (4) sleeved on the two pairs of transmission wheels (3), and a first motor (2) for driving the transmission wheels (3); the conveying chain (4) is formed by hingedly connecting a plurality of slide rails (401); The conveying mechanism is provided with a plurality of telescopically movable limiting frames (402), the limiting frames (402) comprising a slide bar and two shaft frames provided on the slide bar for placing and limiting the drive shaft, so that the conveying mechanism can stably convey the drive shaft and will not affect the quenching of the drive shaft by the quenching mechanism; The quenching mechanism comprises an induction heating coil (8) arranged above the conveying mechanism and capable of transverse movement, and a push rod (13) for limiting the axial movement of the drive shaft, the induction heating coil (8) being provided with a water spray ring (9), one end of the water spray ring (9) being provided with a limiting cylinder (10), the limiting cylinder (10) being provided with four limiting wheels (11) capable of limiting the drive shaft, and the other end of the water spray ring (9) being provided with a magnet (12) for adsorbing a limiting frame (402), so that when the conveying mechanism drives the drive shaft to be quenched to move to the quenching mechanism, the quenching mechanism pushes the limiting frame (402) away by transverse movement and replaces the limiting frame (402) to be sleeved on the drive shaft for quenching. A bayonet (21) is provided at the bottom of the slide rail (401), a groove (18) is provided on the limiting frame (402), a clamping block (19) and a spring (20) are provided in the groove (18), and the bottom end of the clamping block (19) extends into the bayonet (21) and is engaged with the bayonet (21), so that the quenching mechanism can push the limiting frame (402) normally when quenching the drive shaft, and can drive the limiting frame (402) to reset normally through the magnet (12) when resetting and limit when resetting.

2. The conveying device for heat treatment of automobile drive shafts according to claim 1, characterized in that: A cross frame (5) is arranged on the top of the frame (1), and a moving mechanism capable of driving the quenching mechanism to move is arranged on the cross frame (5); The moving mechanism comprises a screw rod (7) rotatably mounted on a cross frame (5) and a second motor (6) for driving the screw rod (7); a connecting block connected to an induction heating coil (8) is provided on a threaded sleeve on the screw rod (7); and the top rod (13) is fixedly connected to the cross frame (5).

3. The conveying device for heat treatment of automobile drive shafts according to claim 1, characterized in that: Two guard plates (15) are provided on both sides of the frame (1), thereby limiting the axial position of the drive shaft so that it can be smoothly transported to the quenching mechanism without colliding with the water spray ring (9) or the push rod (13) during transportation.

4. The conveying device for heat treatment of automobile drive shafts according to claim 1, characterized in that: Brackets (16) are provided on both sides of the interior of the frame (1), so that the bottom of the conveyor chain (4) located above can be supported by the two brackets (16), thereby preventing it from sagging and causing the position of the drive shaft to be unable to correspond to the quenching mechanism.

5. The conveying device for heat treatment of automobile drive shafts according to claim 4, characterized in that: Two rollers (17) are arranged at the bottom of the slide rail (401), so that when the bracket (16) supports the conveyor chain (4), friction will not cause wear on both.

6. The conveying device for heat treatment of automobile drive shafts according to claim 1, characterized in that: A plurality of first pulleys (403) are arranged on the shaft frame of the limiting frame (402), so that the limiting frame (402) will not cause scratches on the driving shaft when moving, and the shaft frame of the limiting frame (402) will not be restricted by the step shaft when moving.

7. The conveying device for heat treatment of automobile drive shafts according to claim 1, characterized in that: A second roller (14) is provided at one end of the push rod (13), so that when the drive shaft follows the movement of the conveying mechanism, even if there is an error in the axial position of the drive shaft causing one end of the drive shaft to overflow the push rod (13), the drive shaft can still smoothly pass over the push rod (13) under the guidance of the second roller (14).

8. The conveying equipment for heat treatment of automobile drive shafts according to claim 1, characterized in that: A water receiving box (22) is provided in the frame (1), and the water receiving box (22) is located directly below the quenching mechanism and is used to receive sprayed cooling waste water.

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