Diesel engine crankshaft quenching device and quenching process

Abstract

The diesel engine crankshaft quenching device comprises a quenching console, one side of the quenching console is provided with a quenching cooling pool, the inner side of the quenching cooling pool is provided with a supporting seat, the supporting seat is provided with a fixing assembly convenient to adjust, the fixing assembly comprises a transmission main screw rod, and the inner side of the supporting seat is provided with a groove; the transmission main screw is located in the groove and rotationally connected to the supporting base through a bearing, a first sliding block is arranged on the transmission main screw, the first sliding block and the transmission main screw are connected through internal and external threads, and a fixing frame is arranged at one end of the first sliding block; through the design of the fixing assembly, clamping and position adjustment of a crankshaft are more convenient, rapid adjustment can be carried out according to crankshafts of various lengths and diameters, quenching requirements of crankshafts of various specifications are met, a multi-angle spraying device is adopted, it is ensured that the crankshaft is evenly cooled in the quenching process, the possibility of crankshaft deformation is reduced, and the quenching quality of the crankshaft is improved. The quenching quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crankshaft quenching, in particular to a diesel engine crankshaft quenching device and a quenching process. Background Art

[0002] In the field of modern mechanical manufacturing, the crankshaft is a key rotating component in internal combustion engines such as diesel engines, and is subjected to complex alternating loads. In order to improve the wear resistance and fatigue strength of the crankshaft, it is usually necessary to quench the crankshaft.

[0003] Traditional crankshaft quenching usually involves immersing the entire crankshaft in a cooling medium for cooling. Due to the asymmetric shape and size of the crankshaft, when it is placed directly in the cooling pool, the bottom of the crankshaft will first contact the coolant, resulting in inconsistent cooling rates between the bottom and top of the crankshaft, causing uneven cooling. The difference in cooling rate will cause uneven stress distribution inside the crankshaft, causing deformation. Summary of the invention

[0004] The purpose of the present invention is to provide a diesel engine crankshaft quenching device and a quenching process to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a diesel engine crankshaft quenching device, comprising a quenching console, a quenching cooling pool is arranged on one side of the quenching console, a support seat is arranged on the inner side of the quenching cooling pool, a fixing component convenient for adjustment is arranged on the support seat, the fixing component comprises a transmission main screw, a groove is arranged on the inner side of the support seat, the transmission main screw is located in the groove and is rotatably connected to the support seat through a bearing, a first slider is arranged on the transmission main screw, the first slider and the transmission main screw are connected with internal and external threads, a fixing frame is arranged at one end of the first slider, a second slider is arranged on the transmission main screw above the first slider, and the second slider A liquid separation box is provided at one end of the block, a first nozzle is provided at the bottom of the liquid separation box, fixed blocks are provided on both sides of the liquid separation box, a rotating shaft is rotatably provided between the two fixed blocks, a side box is fixedly sleeved on the rotating shaft, a second nozzle is provided at the bottom of the side box, the liquid separation box and the side box are connected by a connecting pipe, a storage box is provided on the top of the second slider, a connecting pipe is provided between the storage box and the liquid separation box, a reflux pipe is provided on the top of the storage box, a support block is provided on the inner side of the quenching cooling pool, the end of the reflux pipe passes through the support block and extends to the interior of the quenching cooling pool, a suction pump is provided on the reflux pipe, and an adjusting component for easy opening, closing and rotation is provided between the support seat and the connecting pipe.

[0006] Preferably, a first arc-shaped clamping seat is arranged on the upper side of the bottom of the fixing frame. A sliding groove is formed on one side of the fixing frame. A transmission screw rod is arranged in the sliding groove of the fixing frame. A second arc-shaped clamping seat is arranged on the transmission screw rod. The second arc-shaped clamping seat is connected with the transmission screw rod by internal and external threads. The second arc-shaped clamping seat and the first arc-shaped clamping seat are arranged opposite to each other. A first connecting strip seat and a second connecting strip seat are respectively arranged on one side of the two fixing frames.

[0007] Preferably, a slot is formed at one end of the first connecting strip seat. The end of the second connecting strip seat is in a "T" shape and is slidably inserted into the slot. A support spring is arranged between the second connecting strip seat and the slot. A plurality of jacks are arranged on one side of the second connecting strip seat, and the plurality of jacks are arranged and distributed along one side of the second connecting strip seat.

[0008] Preferably, a mounting seat is arranged on one side of the first connecting strip seat. A receiving groove is formed at one end of the mounting seat. A mounting plate is arranged at the opening of the receiving groove. A plug rod is slidably inserted into the mounting plate. The end of the plug rod is matched with the jack. A limiting block is arranged on the plug rod. A abutting spring is sleeved on the plug rod. A handle is arranged at the end of the plug rod.

[0009] Preferably, the adjusting assembly includes a cylinder. The cylinder is located in the groove and is fixedly connected to the support seat. A circular plate is arranged at the opening of the cylinder. A side seat is arranged on one side of the communicating pipe. A receiving groove is formed inside the side seat. A movable sealing block is slidably inserted into the receiving groove.

[0010] Preferably, a abutting rod is slidably inserted into the circular plate. A cylindrical air bag is arranged inside the cylinder. The cylindrical air bag is bonded to the abutting rod. A first connecting pipe and a second connecting pipe are respectively arranged at the bottom of the cylindrical air bag.

[0011] Preferably, the movable sealing block is in an "L" shape, and the end extends to cover the hole cross-section of the communicating pipe. A return spring is arranged between the movable sealing block and the receiving groove. A first air bag is arranged on the other side of the movable sealing block and the receiving groove. One side of the first air bag is communicated with the second connecting pipe.

[0012] Preferably, a gear is fixedly sleeved on the rotating shaft. A fixed seat is arranged on one side of the fixed block. The inside of the fixed seat is in a cavity structure. A fixing plate is arranged at the top of the fixed seat. A gear block is slidably inserted into the fixed seat. A second air bag is arranged at the bottom of the gear block inside the fixed seat. The gear block and the gear are meshed with each other. A connecting block is arranged at the top of the fixed block.

[0013] Preferably, a guide rod is arranged on the connecting block. The bottom of the guide rod penetrates through the upper part of the gear block. A spring is arranged on the guide rod. One end of the second air bag is communicated with the first connecting pipe.

[0014] A quenching process for a diesel engine crankshaft, which is applied to a quenching device for a diesel engine crankshaft. The quenching process includes the following steps: S1: Fix and clamp the crankshaft on the fixing component so that the crankshaft is quenched in a horizontal state; S2: Start the induction heater to heat the crankshaft until the entire crankshaft is heated; S3: After the crankshaft is heated, start the cooling device. The driving main screw drives the first slider to move downward until it contacts and presses down the abutting rod; S4: The bottom of the crankshaft is immersed in the cooling medium. At the same time, activate the cylindrical airbag, open the connecting pipe, and the cooling medium is sprayed onto the top of the crankshaft through the first nozzle; S5: At the same time, activate the second airbag and rotate the side box. The cooling medium is sprayed onto both sides of the crankshaft through the second nozzles on both sides to achieve multi-angle cooling of the crankshaft; S6: After the crankshaft is kept in the cooling medium for a certain period of time, reverse the rotation of the driving main screw to move the crankshaft away from the cooling medium.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the design of the fixing component, the clamping and position adjustment of the crankshaft are more convenient, and it can be quickly adjusted according to crankshafts of various lengths and diameters to meet the quenching requirements of crankshafts of various specifications. And a multi-angle spraying device is adopted to ensure uniform cooling of the crankshaft during the quenching process, reduce the possibility of crankshaft deformation, and improve the quenching quality.

[0016] 2. Through the design of the return pipe and the suction pump, the recycling of the cooling medium is realized, saving resources. And the design of the support spring and the adjustment component ensures the stability of the fixing frame, while allowing a certain degree of adjustment flexibility to ensure the smooth progress of the quenching process. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the quenching device for a diesel engine crankshaft of the present invention.

[0018] Figure 2 It is a schematic structural diagram of one side of the quenching cooling pool of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the fixing component of the present invention.

[0020] Figure 4 It is a cross-sectional view between the first connecting bar seat and the mounting seat of the present invention.

[0021] Figure 5 It is for the present invention Figure 4 The enlarged structural schematic diagram at A in

[0022] Figure 6 This is a schematic structural diagram between the storage box and the liquid separation box of the present invention.

[0023] Figure 7 For the present invention Figure 6 The enlarged schematic structural diagram at position B in the present invention.

[0024] Figure 8 This is a cross-sectional view of the side seat of the present invention.

[0025] Figure 9 For the present invention Figure 8 The enlarged schematic structural diagram at position C in the present invention.

[0026] Figure 10 This is a schematic structural diagram of the adjustment component of the present invention.

[0027] Figure 11 For the present invention Figure 10 The enlarged schematic structural diagram at position D in the present invention.

[0028] In the figure: quenching control console 1; quenching cooling pool 2; support seat 3; groove 31; driving main screw 32; first slider 33; second slider 34; cylinder 35; cylindrical airbag 351; circular plate 352; abutting rod 353; first connecting pipe 354; second connecting pipe 355; fixing frame 4; first arc clamping seat 41; driving screw 42; second arc clamping seat 43; first connecting bar seat 44; slot 441; mounting seat 442; supporting spring 443; mounting plate 444; inserting rod 445; limiting block 446; abutting spring 447; handle 448; second connecting bar seat 45; jack 451; liquid separation box 5; first spray head 51; storage box 6; return pipe 61; supporting block 62; suction pump 63; side box 7; fixing block 71; second spray head 72; rotating shaft 73; gear 74; communicating pipe 8; side seat 81; movable sealing block 82; return spring 83; first airbag 84; fixing seat 9; second airbag 91; gear block 92; fixing plate 93; connecting block 94; guiding rod 95; spring 96. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figure 1This is a schematic structural diagram of the quenching device for the diesel engine crankshaft of the present invention. The present invention provides a technical solution: a quenching device for a diesel engine crankshaft, including a quenching control console 1. The quenching control console 1 is used to control and adjust various parameters during quenching, such as heating temperature and cooling time. A quenching cooling pool 2 is installed on one side of the quenching control console 1. The quenching cooling pool 2 provides the cooling medium required for quenching. A support seat 3 is fixedly connected to the inner side of the quenching cooling pool 2, and an adjustable fixing component is arranged on the support seat 3.

[0031] Figure 2 This is a schematic structural diagram of one side of the quenching cooling pool of the present invention. The fixing component includes a driving main screw 32. A groove 31 is opened inside the support seat 3. The driving main screw 32 is located in the groove 31 and is rotationally connected to the support seat 3 through a bearing. A first motor is installed on the top of the support seat 3, and a fixed connection is established between the output end of the first motor and the driving main screw 32. The model of the first motor can be selected according to the actual working conditions. A first slider 33 is sleeved on the driving main screw 32, and the first slider 33 is internally and externally threaded with the driving main screw 32. One end of the first slider 33 is fixedly connected to a fixing frame 4.

[0032] Start the first motor. The output end of the first motor drives the driving main screw 32 to rotate. The rotation of the driving main screw 32 drives the first slider 33 to move along the direction of the groove 31 through internal and external thread connection, thereby adjusting the position of the fixing frame 4.

[0033] Figure 3 This is a schematic structural diagram of the fixing component of the present invention. A first arc clamp seat 41 is fixedly connected to the upper side of the bottom of the fixing frame 4. A chute is opened on one side of the fixing frame 4. A driving screw 42 is rotationally connected to the fixing frame 4 through a bearing in the chute. One end of the driving screw 42 is fixedly connected to a second motor. The model of the second motor can be selected according to the actual working conditions. A second arc clamp seat 43 is sleeved on the driving screw 42, and the second arc clamp seat 43 is internally and externally threaded with the driving screw 42. The second arc clamp seat 43 is arranged opposite to the first arc clamp seat 41, and the second arc clamp seat 43 and the first arc clamp seat 41 are used to clamp the crankshaft.

[0034] Before quenching, the two ends of the crankshaft are lapped on the first arc clamp seat 41. Start the second motor. The driving screw 42 rotates under the drive of the second motor, and drives the second arc clamp seat 43 to move along the chute through internal and external thread connection. The second arc clamp seat 43 moves downward and approaches the first arc clamp seat 41, thereby clamping the crankshaft.

[0035] On one side of each of the two fixing brackets 4, a first connecting bar seat 44 and a second connecting bar seat 45 are fixedly connected respectively. One end of the first connecting bar seat 44 is provided with a slot 441. The end of the second connecting bar seat 45 has a "T" - shaped structure and is slidably inserted into the slot 441. On one side of the second connecting bar seat 45, a plurality of jacks 451 are provided, and the plurality of jacks 451 are arranged and distributed along one side of the second connecting bar seat 45.

[0036] Through the insertion of the first connecting bar seat 44 and the second connecting bar seat 45 via the slot 441 and the "T" - shaped structure, and the adjustment of the jacks 451, the relative distance between the two fixing brackets 4 is maintained, and thus the relative distance is adjusted according to the length of the crankshaft.

[0037] Figure 4 This is a cross - sectional view between the first connecting bar seat and the mounting seat of the present invention. Figure 5 For the present invention Figure 4 In the enlarged structural schematic diagram of part A in the present invention, a support spring 443 is fixedly connected between the second connecting bar seat 45 and the slot 441. One side of the first connecting bar seat 44 is fixedly connected with a mounting seat 442. One end of the mounting seat 442 is provided with a receiving groove, and at the opening of the receiving groove, a mounting plate 444 is provided. The mounting plate 444 is fixed to the mounting seat 442 by screws.

[0038] A plug rod 445 is slidably inserted into the mounting plate 444. The end of the plug rod 445 is matched with the jack 451. A limit block 446 is fixedly connected to the plug rod 445. A contact spring 447 is sleeved on the plug rod 445. The end of the plug rod 445 is fixedly connected with a handle 448, and the surface of the handle 448 is coated with a high - temperature - resistant material.

[0039] The support spring 443 provides elastic force to maintain the stability of the fixing bracket and at the same time allows a certain degree of adjustment flexibility. The operator manually adjusts the position of the plug rod 445 through the handle 448. The limit block 446 ensures that the plug rod does not move excessively. The contact spring 447 assists in the insertion and extraction of the plug rod. When the position and angle of the crankshaft are adjusted in place, the first arc clamp seat 41 and the second arc clamp seat 43 tightly clamp the crankshaft, preparing for quenching.

[0040] Figure 2 This is a structural schematic diagram on one side of the quenching cooling pool of the present invention. Above the first slider 33 on the driving main screw 32, a second slider 34 is sleeved. The second slider 34 is internally and externally threaded with the driving main screw 32. One end of the second slider 34 is fixedly connected with a liquid distribution box 5. The liquid distribution box 5 is used for distributing the cooling medium. At the bottom of the liquid distribution box 5, a first spray head 51 is connected and installed. The first spray head 51 is located above the clamping position of the crankshaft, and the first spray head 51 is used for spraying above the crankshaft.

[0041] The driving main screw 32 rotates under the drive of the first motor, and drives the liquid distribution box 5 and the storage box 6 to move up and down along the driving main screw 32 through the second slider 34, so that the crankshaft and the spraying device move simultaneously.

[0042] Both sides of the liquid distribution box 5 are connected with fixing blocks 71. A rotating shaft 73 is rotatably connected between the two fixing blocks 71. A side box 7 is fixedly sleeved on the rotating shaft 73, so that the side box 7 can rotate around the rotating shaft 73. A second spray head 72 is connected and installed at the bottom of the side box 7. In the initial state, the second spray head 72 and the first spray head 51 are on the same plane. The liquid distribution box 5 and the side box 7 are connected by a connecting pipe. The top of the second slider 34 is fixedly connected with a storage box 6. The storage box 6 is used to store the cooling medium. A communicating pipe 8 is communicated between the storage box 6 and the liquid distribution box 5. The cooling medium is pumped into the storage box 6 and flows to the liquid distribution box 5 through the communicating pipe 8.

[0043] Figure 6 It is a schematic structural diagram between the storage box and the liquid distribution box of the present invention. Figure 7 For the present invention Figure 6 It is an enlarged structural schematic diagram at B in the present invention. A return pipe 61 is communicated at the top of the storage box 6. A support block 62 is fixedly connected to the inner side of the quenching cooling pool 2. The end of the return pipe 61 passes through the support block 62 and extends into the interior of the quenching cooling pool 2. A suction pump 63 is installed on the return pipe 61. When the suction pump 63 is started, the cooling medium in the quenching cooling pool 2 is pumped back into the storage box 6 through the return pipe 61, realizing the recycling of the cooling medium.

[0044] Figure 7 For the present invention Figure 6 It is an enlarged structural schematic diagram at B in the present invention. An adjusting component for facilitating opening, closing and rotation is arranged between the support seat 3 and the communicating pipe 8. The adjusting component includes a cylinder 35. The cylinder 35 is located in the groove 31 and fixedly connected to the support seat 3. A circular plate 352 is arranged at the opening of the cylinder 35. The circular plate 352 is fixed on the cylinder 35 by screws.

[0045] A butting rod 353 is slidably inserted on the circular plate 352. The butting rod 353 and the first slider 33 are arranged oppositely. When the first slider 33 moves downward to contact the butting rod 353, the crankshaft is close to the upper edge of the cooling medium in the quenching cooling pool 2. The specific distance setting can be selected according to the actual situation of those skilled in the art. A cylindrical airbag 351 is adhesively connected to the inner bottom side of the cylinder 35. The cylindrical airbag 351 is adhesively connected to the butting rod 353. The bottom of the cylindrical airbag 351 is respectively communicated with a first connecting pipe 354 and a second connecting pipe 355.

[0046] Figure 8 It is a cross-sectional view of the side seat of the present invention. Figure 9 For the present invention Figure 8Schematic diagram of the enlarged structure at position C in the figure. One side of the connecting pipe 8 is fixedly connected with a side seat 81. A storage groove is formed inside the side seat 81. An active sealing block 82 is slidably inserted into the storage groove. The active sealing block 82 has an "L" - shaped structure, and its end extends to cover the hole cross - section of the connecting pipe 8. A return spring 83 is fixedly connected between the active sealing block 82 and the storage groove. A first airbag 84 is bonded to the other side of the active sealing block 82 and the storage groove. One side of the first airbag 84 is communicated with the second connecting pipe 355.

[0047] Figure 10 Schematic diagram of the structure of the adjustment component of the present invention Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure at position D in the figure. A gear 74 is fixedly sleeved on the rotating shaft 73. One side of the fixed block 71 is fixedly connected with a fixed seat 9. The inside of the fixed seat 9 has a cavity structure. The top of the fixed seat 9 is fixed with a fixing plate 93 by screws. A gear block 92 is slidably inserted into the fixed seat 9. A second airbag 91 is bonded to the bottom of the gear block 92 inside the fixed seat 9. The supporting force of the second airbag 91 can support the entire spraying device, and its model can be selected according to the actual working conditions. The gear block 92 and the gear 74 are meshed with each other.

[0048] The top of the fixed block 71 is fixedly connected with a connecting block 94. A guide rod 95 is fixedly connected to the connecting block 94. The bottom of the guide rod 95 penetrates through the upper part of the gear block 92. A spring 96 is sleeved on the guide rod 95. One end of the second airbag 91 is communicated with the first connecting pipe 354.

[0049] The driving main screw 32 rotates under the drive of the first motor, driving the first slider 33 to move downward until it contacts and presses down the abutting rod 353. At this time, the bottom of the crankshaft first immerses into the cooling medium in the quenching cooling pool 2. At the same time, the abutting rod 353 presses down the cylindrical airbag 351, causing the cylindrical airbag 351 to be compressed. The gas inside it is transmitted to the first airbag 84 through the second connecting pipe 355. The first airbag 84 expands and pushes the active sealing block 82 away, opening the connecting pipe 8 between the liquid - separating box 5 and the storage box 6. The cooling medium is sprayed onto the top of the crankshaft through the first spray head 51. At the same time, another part of the gas inside the cylindrical airbag 351 is compressed and transmitted to the second airbag 91 through the first connecting pipe 354. The second airbag 91 expands and pushes the gear block 92 upward. The gear 74 rotates under the upward drive of the gear block 92, driving the side box 7 to rotate downward. At this time, the connecting pipe 8 between the liquid - separating box 5 and the storage box 6 is opened. The liquid - separating box 5 and the side box 7 are connected by a connecting pipe. The cooling medium is sprayed onto both sides of the crankshaft through the second spray heads 72 on both sides. In this way, multi - angle relative simultaneous cooling of the crankshaft is realized, ensuring uniform cooling of the crankshaft during quenching, reducing the possibility of crankshaft deformation, and improving the quenching quality.

[0050] A quenching process for a diesel engine crankshaft, which is applied to a diesel engine crankshaft quenching device. The quenching process includes the following steps: S1: Fix and clamp the crankshaft on the fixing component so that the crankshaft is quenched in a horizontal state; S2: Start the induction heater to heat the crankshaft until the entire crankshaft is heated; S3: After the crankshaft is heated, start the cooling device. The driving main screw 32 drives the first slider 33 to move downward until it contacts and presses down the abutting rod 353; S4: Immerse the bottom of the crankshaft in the cooling medium. At the same time, activate the cylindrical airbag 351 and open the connecting pipe 8. The cooling medium is sprayed onto the top of the crankshaft through the first nozzle 51; S5: At the same time, activate the second airbag 91 and rotate the side box 7. The cooling medium is sprayed onto both sides of the crankshaft through the second nozzles 72 on both sides to achieve multi-angle cooling of the crankshaft; S6: After the crankshaft is kept in the cooling medium for a certain period of time, reverse the rotation of the driving main screw 32 so that the crankshaft moves away from the cooling medium.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diesel engine crankshaft quenching device, comprising a quenching control console (1), characterized in that: A quenching cooling pool (2) is provided on one side of the quenching cooling pool (2), a support seat (3) is provided on the inner side of the quenching cooling pool (2), a fixing component that is easy to adjust is provided on the support seat (3), and the fixing component includes a transmission main screw (32), a groove (31) is provided on the inner side of the support seat (3), the transmission main screw (32) is located in the groove (31) and is rotatably connected to the support seat (3) through a bearing, a first slider (33) is provided on the transmission main screw (32), the first slider (33) and the transmission main screw (32) are connected by internal and external threads, a fixing frame (4) is provided at one end of the first slider (33), a second slider (34) is provided on the transmission main screw (32) above the first slider (33), a liquid separation box (5) is provided at one end of the second slider (34), and a first nozzle (5) is provided at the bottom of the liquid separation box (5). 1), fixed blocks (71) are arranged on both sides of the liquid separation box (5), a rotating shaft (73) is rotatably arranged between the two fixed blocks (71), a side box (7) is fixedly sleeved on the rotating shaft (73), a second nozzle (72) is arranged at the bottom of the side box (7), the liquid separation box (5) and the side box (7) are connected by a connecting pipe, a storage box (6) is arranged on the top of the second slider (34), a connecting pipe (8) is arranged between the storage box (6) and the liquid separation box (5), a return pipe (61) is arranged on the top of the storage box (6), a support block (62) is arranged on the inner side of the quenching cooling pool (2), the end of the return pipe (61) passes through the support block (62) and extends to the inside of the quenching cooling pool (2), a suction pump (63) is arranged on the return pipe (61), and an adjustment component for facilitating opening, closing and rotation is arranged between the support seat (3) and the connecting pipe (8).

2. A diesel engine crankshaft quenching device according to claim 1, characterized in that: A first arc clamp seat (41) is arranged on the upper side of the bottom of the fixing frame (4), a slide groove is opened on one side of the fixing frame (4), a driving screw (42) is arranged on the fixing frame (4) and located in the slide groove, a second arc clamp seat (43) is arranged on the driving screw (42), the second arc clamp seat (43) and the driving screw (42) are connected by internal and external threads, the second arc clamp seat (43) and the first arc clamp seat (41) are arranged opposite to each other, and a first connecting strip seat (44) and a second connecting strip seat (45) are respectively arranged on one side of the two fixing frames (4).

3. A diesel engine crankshaft quenching device according to claim 2, characterized in that: A slot (441) is provided at one end of the first connecting bar seat (44), the end of the second connecting bar seat (45) is in a "T"-shaped structure and is slidably plugged into the slot (441), a supporting spring (443) is provided between the second connecting bar seat (45) and the slot (441), a plug hole (451) is provided at one side of the second connecting bar seat (45), a plurality of plug holes (451) are provided, and the plurality of plug holes (451) are arranged and distributed along one side of the second connecting bar seat (45).

4. A diesel engine crankshaft quenching device according to claim 2, characterized in that: A mounting seat (442) is provided on one side of the first connecting bar seat (44), a receiving groove is provided at one end of the mounting seat (442), a mounting plate (444) is provided at the opening of the receiving groove, an insertion rod (445) is slidably inserted on the mounting plate (444), the end of the insertion rod (445) matches the insertion hole (451), a limiting block (446) is provided on the insertion rod (445), an abutment spring (447) is sleeved on the insertion rod (445), and a handle (448) is provided at the end of the insertion rod (445).

5. A diesel engine crankshaft quenching device according to claim 1, characterized in that: The adjustment assembly comprises a cylinder (35), the cylinder (35) being located in the groove (31) and fixedly connected to the support seat (3), a circular plate (352) being provided at the opening of the cylinder (35), a side seat (81) being provided at one side of the connecting pipe (8), a receiving groove being provided inside the side seat (81), and a movable sealing block (82) being slidably plugged into the receiving groove.

6. A diesel engine crankshaft quenching device according to claim 5, characterized in that: An abutment rod (353) is slidably inserted on the circular plate (352), a cylindrical airbag (351) is arranged inside the cylinder (35), the cylindrical airbag (351) and the abutment rod (353) are bonded, and a first connecting tube (354) and a second connecting tube (355) are respectively arranged at the bottom of the cylindrical airbag (351).

7. A diesel engine crankshaft quenching device according to claim 5, characterized in that: The movable sealing block (82) has an "L"-shaped structure, and its end extends to cover the hole cross section of the connecting pipe (8). A return spring (83) is provided between the movable sealing block (82) and the receiving groove. A first air bag (84) is provided on the other side of the movable sealing block (82) and the receiving groove. One side of the first air bag (84) is connected to the second connecting pipe (355).

8. A diesel engine crankshaft quenching device according to claim 1, characterized in that: A gear (74) is fixedly sleeved on the rotating shaft (73); a fixing seat (9) is provided on one side of the fixing block (71); the interior of the fixing seat (9) is a hollow structure; a fixing plate (93) is provided on the top of the fixing seat (9); a gear block (92) is slidably inserted on the fixing seat (9); a second air bag (91) is provided at the bottom of the gear block (92) in the fixing seat (9); the gear block (92) and the gear (74) are meshed with each other; and a connecting block (94) is provided on the top of the fixing block (71).

9. A diesel engine crankshaft quenching device according to claim 8, characterized in that: The connecting block (94) is provided with a guide rod (95), the bottom of the guide rod (95) passes through the upper part of the gear block (92), a spring (96) is provided on the guide rod (95), and one end of the second airbag (91) is connected to the first connecting pipe (354).

10. A diesel engine crankshaft quenching process, characterized in that: The quenching process is applied to the diesel engine crankshaft quenching device as claimed in any one of claims 1 to 9, and the quenching process comprises the following steps: S1: The crankshaft is fixedly clamped on the fixed assembly so that the crankshaft is quenched in a horizontal state; S2: Start the induction heater to heat the crankshaft until the entire crankshaft is heated; S3: After the crankshaft is heated, the cooling device is started, and the transmission main screw (32) drives the first slider (33) to move downward until it contacts and presses the abutment rod (353) downward; S4: The bottom of the crankshaft is immersed in the cooling medium. At the same time, the cylindrical airbag (351) is activated, the connecting pipe (8) is opened, and the cooling medium is sprayed onto the top of the crankshaft through the first nozzle (51); S5: At the same time, the second airbag (91) is activated, the side box (7) is rotated, and the cooling medium is sprayed onto both sides of the crankshaft through the second nozzles (72) on both sides, thereby achieving multi-angle cooling of the crankshaft; S6: After the crankshaft remains in the cooling medium for a certain period of time, the transmission main screw (32) is rotated in the reverse direction, and the crankshaft is separated from the cooling medium.

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