Sprocket shaft induction hardening device

Abstract

The utility model provides an induction quenching device for a chain wheel shaft. The induction quenching device comprises a connecting plate, a heating ring and a quenching ring, the connecting plate is connected with the heating ring, and the quenching ring is connected below the heating ring; the heating ring comprises a heating inner ring, a heating outer ring, a heating ring upper cover plate and a heating ring lower cover plate, the shape of the heating inner ring is matched with the shape of the outer wall of the chain wheel shaft, and the shape of the heating outer ring is cylindrical; the heating ring upper cover plate is connected with the upper ends of the heating inner ring and the heating outer ring, and the heating ring lower cover plate is connected with the lower ends of the heating inner ring and the heating outer ring, so that a first water cavity is formed among the heating inner ring, the heating outer ring, the heating ring upper cover plate and the heating ring lower cover plate, and the heating ring is cooled during heating through the first water cavity. The heating outer ring is cylindrical, so that when cooling water flows through the first water cavity, the turning frequency of the cooling water is reduced, the cooling water is guaranteed to flow smoothly, the cooling effect of the cooling water is improved, and damage caused by overheating of the heating ring during heating is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sprocket heat treatment devices, in particular to an induction quenching device for a sprocket shaft. Background Art

[0002] Sprockets are mainly used in the transmission part of the power unit and are used in conjunction with chains. With the changes in the structural design of the transmission equipment, the service life of the sprocket shaft teeth has attracted much attention. At present, the sprocket shaft teeth are mainly treated by induction quenching to increase the surface hardness and wear resistance of the sprocket shaft teeth, thereby increasing the service life of the sprocket shaft teeth. However, the existing single-tooth profiling induction quenching process is usually used to perform induction quenching on each tooth separately, resulting in low production efficiency; and there are overlapping heating areas in the quenching area, which are prone to forming quenching soft belts, thereby affecting the quality of the sprocket shaft teeth.

[0003] In the prior art, for example, the Chinese invention with application number 201310340509.6 discloses a sprocket quenching method and a quenching sensor, and specifically discloses that the sensor includes a main induction coil, a connecting plate, a water inlet pipe and a water outlet pipe; the main induction coil includes an effective coil that follows the profile of the full teeth of the sprocket, a bus bar connected to both ends of the effective coil, and a transition pipe connected to the bus bar. Since the effective coil of the inductor completely follows the profile of the full teeth of the sprocket, there is no quenching soft belt, and the full teeth of the sprocket can be heated and quenched by medium-frequency induction and simultaneous heating, thereby improving the induction heating speed and thus improving production efficiency. However, since the induction coil of the patent completely follows the profile of the full teeth of the sprocket, the cooling water must go through multiple turns when flowing through the induction coil before it can be discharged, so that the cooling water in the induction coil does not flow smoothly, resulting in overheating of the induction coil during heating and causing damage. Summary of the invention

[0004] In view of this, the utility model provides a sprocket shaft induction quenching device to solve the technical problem of poor cooling water flow in the induction coil in the prior art, which causes the induction coil to overheat and be damaged during heating.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A sprocket shaft induction quenching device comprises a connecting plate, a heating ring, and a quenching ring; the connecting plate is connected to the heating ring, and the quenching ring is connected below the heating ring; the heating ring comprises a heating inner ring, a heating outer ring, a heating ring upper cover plate and a heating ring lower cover plate, the shape of the heating inner ring is adapted to the shape of the outer wall of the sprocket shaft, and the shape of the heating outer ring is cylindrical; the heating ring upper cover plate is connected to the upper ends of the heating inner ring and the heating outer ring, and the heating ring lower cover plate is connected to the lower ends of the heating inner ring and the heating outer ring, so as to form a first water cavity between the heating inner ring, the heating outer ring, the heating ring upper cover plate and the heating ring lower cover plate, and the heating ring is cooled by the first water cavity when the sprocket shaft induction quenching device is heated.

[0007] Preferably, the connecting plate includes a first connecting plate, a second connecting plate, a water box and a first copper tube; the first connecting plate is connected to the second connecting plate, the water box is respectively connected to the first connecting plate and the second connecting plate, the first copper tube is connected to the water box, and the water box is connected to the heating outer ring to provide water to the first water cavity for cooling the heating ring.

[0008] Preferably, the quenching ring includes a quenching inner ring, a quenching outer ring, a quenching ring upper cover plate, a quenching ring lower cover plate and a second copper tube. The quenching inner ring is distributed with small holes. A second water cavity is formed between the quenching inner ring, the quenching outer ring, the quenching ring upper cover plate and the quenching ring lower cover plate. The second copper tube is connected to the quenching outer ring to provide water into the second water cavity for quenching and cooling the sprocket shaft through the small holes of the quenching inner ring.

[0009] Preferably, the gap between the quenched inner ring and the sprocket shaft is 8 mm.

[0010] Preferably, the diameter of the small holes distributed in the quenched inner ring is 1.5 mm-5 mm.

[0011] Preferably, the heating ring also includes a first copper plate, which is arranged on the outer wall of the heating outer ring and close to the bottom of the heating outer ring; the quenching ring also includes a second copper plate, which is arranged on the outer wall of the quenching outer ring and close to the top of the quenching outer ring; the first copper plate is connected to the second copper plate to realize the connection between the heating ring and the quenching ring.

[0012] Preferably, the first copper plate and the second copper plate are both provided with holes, and the first copper plate and the second copper plate are connected by bolts.

[0013] Preferably, the gap between the heating inner ring and the sprocket shaft is 3-4 mm.

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

[0015] The sprocket shaft induction quenching device of the utility model connects the heating ring to the power supply through the connecting plate, and the power supply provides current to the heating ring through the connecting plate. The heating ring uses the principle of electromagnetic induction to generate an induced current on the surface of the sprocket shaft, so that the surface of the sprocket shaft is quickly heated to the quenching temperature, and then the sprocket shaft is immediately lowered, and the sprocket shaft is quickly cooled by the quenching ring below the heating ring, so that the sprocket shaft reaches a high hardness. Among them, since the shape of the heating inner ring is adapted to the shape of the outer wall of the sprocket shaft, that is, the heating inner ring is made to be integrally shaped with the outer wall of the sprocket shaft, there is no quenching soft belt during heating, the quality of the sprocket shaft is ensured, and at the same time, the sprocket shaft tooth part is fully heated and quenched by induction, thereby improving production efficiency. In addition, a first water cavity is formed between the heating inner ring, the heating outer ring, the upper cover plate of the heating ring, and the lower cover plate of the heating ring, and the cooling water cools the heating ring through the first water cavity, thereby taking away the heat of the heating ring during heating. Among them, the shape of the heating outer ring is set to be cylindrical, so that the number of turns of the cooling water when flowing through the first water chamber is reduced, ensuring that the cooling water flows unimpeded, thereby improving the cooling effect of the cooling water and avoiding damage caused by overheating of the heating ring during heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the sprocket shaft.

[0017] Figure 2 The utility model is a schematic structural diagram of the sprocket shaft induction quenching device.

[0018] Figure 3 It is a schematic structural diagram of the heating inner ring of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the heating ring of the utility model.

[0020] Figure 5 It is a schematic diagram of the first water chamber of the heating coil of the utility model.

[0021] Figure 6 It is a structural schematic diagram of the connecting plate of the utility model.

[0022] Figure 7 It is a structural schematic diagram of the quenching ring of the utility model.

[0023] In the figure: sprocket shaft 1, connecting plate 10, first connecting plate 11, second connecting plate 12, water box 13, first copper tube 14, heating ring 20, heating inner ring 21, heating outer ring 22, heating ring upper cover 23, heating ring lower cover 24, first copper plate 25, quenching ring 30, quenching inner ring 31, quenching outer ring 32, quenching ring upper cover 33, quenching ring lower cover 34, second copper tube 35, second copper plate 36. DETAILED DESCRIPTION

[0024] The technical scheme and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0025] Please see Figure 1-Figure 5 A sprocket shaft induction quenching device comprises a connecting plate 10, a heating ring 20 and a quenching ring 30; the connecting plate 10 is connected to the heating ring 20, and the quenching ring 30 is connected below the heating ring 20; the heating ring 20 comprises a heating inner ring 21, a heating outer ring 22, a heating ring upper cover plate 23 and a heating ring lower cover plate 24, the shape of the heating inner ring 21 is adapted to the outer wall shape of the sprocket shaft 1, and the shape of the heating outer ring 22 is cylindrical; the heating ring upper cover plate 23 is connected to the upper ends of the heating inner ring 21 and the heating outer ring 22, and the heating ring lower cover plate 24 is connected to the lower ends of the heating inner ring 21 and the heating outer ring 22, so as to form a first water cavity between the heating inner ring 21, the heating outer ring 22, the heating ring upper cover plate 23 and the heating ring lower cover plate 24, and the heating ring 20 is cooled by the first water cavity when the sprocket shaft induction quenching device is heated.

[0026] The sprocket shaft induction quenching device of the utility model connects the heating ring to the power supply through the connecting plate, and the power supply provides current to the heating ring through the connecting plate. The heating ring uses the principle of electromagnetic induction to generate an induced current on the surface of the sprocket shaft, so that the surface of the sprocket shaft is quickly heated to the quenching temperature, and then the sprocket shaft is immediately lowered, and the sprocket shaft is quickly cooled by the quenching ring below the heating ring, so that the sprocket shaft reaches a high hardness. Among them, since the shape of the heating inner ring is adapted to the shape of the outer wall of the sprocket shaft, that is, the heating inner ring is made to be integrally shaped with the outer wall of the sprocket shaft, there is no quenching soft belt during heating, the quality of the sprocket shaft is ensured, and at the same time, the sprocket shaft tooth part is fully heated and quenched by induction, thereby improving production efficiency. In addition, a first water cavity is formed between the heating inner ring, the heating outer ring, the upper cover plate of the heating ring, and the lower cover plate of the heating ring, and the cooling water cools the heating ring through the first water cavity, thereby taking away the heat of the heating ring during heating. Among them, the shape of the heating outer ring is set to be cylindrical, so that the number of turns of the cooling water when flowing through the first water chamber is reduced, ensuring that the cooling water flows unimpeded, thereby improving the cooling effect of the cooling water and avoiding damage caused by overheating of the heating ring during heating.

[0027] In some embodiments, the connection plate 10 and the heating ring 20 are connected by welding, and the heating ring 20 and the quenching ring 30 are connected by bolting. The heating inner ring, the heating outer ring, the heating upper cover plate and the heating lower cover plate of the heating ring 20 are connected by copper welding.

[0028] For further information, see Figure 6 The connecting plate 10 includes a first connecting plate 11, a second connecting plate 12, a water box 13 and a first copper tube 14; the first connecting plate 11 is connected to the second connecting plate 12, the water box 13 is connected to the first connecting plate 11 and the second connecting plate 12 respectively, the first copper tube 14 is connected to the water box 13, and the water box 13 is connected to the heating outer ring 22 to provide water into the first water cavity for cooling the heating ring 20. When the water box 13 receives the cooling water connected to the first copper tube 14, the cooling water first cools the connecting plate 10 through the water box, so that the heat generated by the connecting plate 10 during the conduction process is taken away by the cooling water, so as to prevent the connecting plate 10 from being damaged due to overheating, resulting in the detachment of the heating ring 20 from the connecting plate 10, and the contact between the heating ring and the sprocket shaft affects the quenching effect of the sprocket shaft. In some embodiments, the thickness of the first connecting plate 11 and the second connecting plate 12 can be 8 mm, the thickness of the water box is 2 mm, the first connecting plate 11, the second connecting plate, the water box 13 and the first copper tube 14 are connected by copper welding, and the first copper tube 14 is connected to the external cooling water, so that the cooling water is connected to the water box, and then the cooling water is connected to the heating coil 20 through the water box to cool the heating coil when the heating coil is heated.

[0029] In some embodiments, Figure 2 As shown, the first connecting plate, the second connecting plate, the water box and the copper tube of the connecting plate 10 include two groups, and the first connecting plates and water boxes of the two groups are respectively connected to the outer heating ring. The cooling water is connected from the copper tube of one group, enters the first water cavity of the heating ring through the water box of one group, flows to the water box of the other group through the first water cavity, and flows out from the copper tube of the other group, so as to keep the cooling water flowing continuously and ensure the cooling effect of the cooling water. Among them, the first connecting plate and the second connecting plate are made of copper plates, and the electrical conductivity of copper is used to guide the electric energy of the power supply to the heating ring, and an insulating plate is arranged between the first connecting plates of the two groups to realize the electrical insulation between the two groups of first connecting plates, so as to prevent the short circuit between the two groups of first connecting plates from damaging the heating ring.

[0030] For further information, see Figure 7The quenching ring 30 includes a quenching inner ring 31, a quenching outer ring 32, a quenching ring upper cover plate 33, a quenching ring lower cover plate 34 and a second copper tube 35. The quenching inner ring 31 is provided with small holes. A second water cavity is formed between the quenching inner ring 31, the quenching outer ring 32, the quenching ring upper cover plate 33 and the quenching ring lower cover plate 34. The second copper tube 35 is connected to the quenching outer ring 32 to provide water into the second water cavity, which is used to quench and cool the sprocket shaft 1 through the small holes of the quenching inner ring 31. The second copper tube includes a water inlet copper tube and a water outlet copper tube. The water inlet copper tube of the second copper tube is connected to the external cooling water to connect the cooling water into the second water cavity. The cooling water is discharged through the water outlet copper tube of the second copper tube after passing through the second water cavity to ensure the circulation of the cooling water. The cooling water is sprayed toward the sprocket shaft through the small holes distributed in the quenching inner ring to quench and cool the sprocket shaft. The small holes are provided to spray water to increase the speed of the water flow and the spraying distance, so that the cooling water in the second water chamber can fully fall on the sprocket shaft, thereby quickly cooling the sprocket shaft and improving the hardness of the sprocket shaft. The quenching inner ring, the quenching outer ring, the quenching upper cover plate, the quenching lower cover plate and the second copper tube are connected by copper welding.

[0031] Furthermore, the gap between the quenched inner ring 31 and the sprocket shaft 1 is 8 mm. The diameter of the small holes distributed in the quenched inner ring 31 is 1.5 mm-5 mm.

[0032] Further, the heating ring 20 further includes a first copper plate 25, which is arranged on the outer wall of the heating outer ring 22 and close to the bottom of the heating outer ring 22; the quenching ring 30 further includes a second copper plate 36, which is arranged on the outer wall of the quenching outer ring 32 and close to the top of the quenching outer ring 32; the first copper plate 25 is connected to the second copper plate 36 to achieve the connection between the heating ring 20 and the quenching ring 30. Among them, the first copper plate includes a plurality of first copper plates, which are evenly arranged on the outer wall of the heating outer ring near the bottom of the heating outer ring, and the number of the second copper plates corresponds to that of the first copper plates, and is arranged on the outer wall of the quenching outer ring near the top of the quenching outer ring corresponding to the setting position of the corresponding first copper plate, so as to ensure the stable connection between the heating ring and the quenching ring. The first copper plate 25 and the second copper plate 36 are both provided with holes, and the first copper plate 25 and the second copper plate 36 are connected by bolts.

[0033] Furthermore, the gap between the heating inner ring 21 and the sprocket shaft 1 is 3-4 mm.

[0034] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A sprocket shaft induction quenching device, characterized in that: It includes a connecting plate, a heating ring, and a quenching ring; the connecting plate is connected to the heating ring, and the quenching ring is connected below the heating ring; the heating ring includes a heating inner ring, a heating outer ring, a heating ring upper cover plate and a heating ring lower cover plate, the shape of the heating inner ring is adapted to the outer wall shape of the sprocket shaft, and the shape of the heating outer ring is cylindrical; the heating ring upper cover plate is connected to the upper ends of the heating inner ring and the heating outer ring, and the heating ring lower cover plate is connected to the lower ends of the heating inner ring and the heating outer ring, so as to form a first water cavity between the heating inner ring, the heating outer ring, the heating ring upper cover plate and the heating ring lower cover plate, and the heating ring is cooled by the first water cavity when the sprocket shaft is heated by the induction quenching device.

2. The sprocket shaft induction hardening device according to claim 1, characterized in that: The connecting plate includes a first connecting plate, a second connecting plate, a water box and a first copper tube; the first connecting plate is connected to the second connecting plate, the water box is connected to the first connecting plate and the second connecting plate respectively, the first copper tube is connected to the water box, and the water box is connected to the heating outer ring to provide water to the first water cavity for cooling the heating ring.

3. The sprocket shaft induction hardening device according to claim 2, characterized in that: The quenching ring includes a quenching inner ring, a quenching outer ring, a quenching ring upper cover plate, a quenching ring lower cover plate and a second copper tube. The quenching inner ring is distributed with small holes. A second water cavity is formed between the quenching inner ring, the quenching outer ring, the quenching ring upper cover plate and the quenching ring lower cover plate. The second copper tube is connected to the quenching outer ring to provide water into the second water cavity for quenching and cooling the sprocket shaft through the small holes of the quenching inner ring.

4. The sprocket shaft induction hardening device according to claim 3, characterized in that: The gap between the quenched inner ring and the sprocket shaft is 8 mm.

5. The sprocket shaft induction hardening device according to claim 3, characterized in that: The diameter of the small holes distributed in the quenched inner ring is 1.5mm-5mm.

6. The sprocket shaft induction hardening device according to claim 3, characterized in that: The heating ring also includes a first copper plate, which is arranged on the outer wall of the heating outer ring and close to the bottom of the heating outer ring; the quenching ring also includes a second copper plate, which is arranged on the outer wall of the quenching outer ring and close to the top of the quenching outer ring; the first copper plate is connected to the second copper plate to realize the connection between the heating ring and the quenching ring.

7. The sprocket shaft induction hardening device according to claim 6, characterized in that: The first copper plate and the second copper plate are both provided with holes, and the first copper plate and the second copper plate are connected by bolts.

8. The sprocket shaft induction hardening device according to claim 1, characterized in that: The gap between the heating inner ring and the sprocket shaft is 3-4 mm.

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