A crankshaft induction heating and quenching device

Abstract

The present invention provides a crankshaft induction heating and quenching device, which relates to the technical field of crankshaft processing and solves the problem in the prior art that there is a risk of scalding when lifting and transporting the heated crankshaft. It includes a cooling tank and an induction heating device arranged above the cooling tank. The induction heating device includes a support mechanism for placing and positioning the crankshaft and a lifting mechanism for driving the support mechanism to lift and lower; several opening and closing induction devices are arranged on both sides of the support mechanism. The support mechanism is arranged above the cooling tank to support and position the crankshaft, and then the connecting rod journal is accurately aligned by the opening and closing induction device for induction heating. After heating, the crankshaft is lowered into the cooling tank by the lifting mechanism for quenching, avoiding the risk of scalding caused by lifting and transporting the heated crankshaft.

Description

Technical Field

[0001] The present invention relates to the technical field of crankshaft processing, and more specifically, to a crankshaft induction heating and quenching device. Background Art

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted by the connecting rod and converts it into torque, which is output through the crankshaft to drive other accessories on the engine to work. The crankshaft mainly consists of main shafts, crank arms, balance weights, connecting rod journals, etc. A connecting rod connecting the piston needs to be sleeved on the connecting rod journal. When the engine is working, the crankshaft rotates around the main shaft, and the connecting rod journal on the crankshaft drives the piston to reciprocate through the connecting rod. During the movement of the piston, there is rotational friction between the connecting rod journal and the connecting rod. In order to improve the strength and wear resistance of the connecting rod journal and extend the service life of the crankshaft, the connecting rod journal is treated by quenching.

[0003] When the existing quenching device heats the crankshaft, it is necessary to use a fixture to clamp and fix the crankshaft, and then perform induction heating operation on the connecting rod journal. After heating, the fixture is released, and the crankshaft is lifted by a hoist and quenched in the coolant. There is a risk of scalding when the heated crankshaft is lifted again. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a crankshaft induction heating and quenching device, which sets a support mechanism above the cooling tank to support and position the crankshaft, and then accurately aligns the connecting rod journal through the opening and closing induction device for induction heating. After heating, the crankshaft descends into the cooling tank through the lifting mechanism for quenching, avoiding the risk of scalding caused by lifting the heated crankshaft.

[0005] The embodiments of the present invention are realized through the following technical solutions:

[0006] A crankshaft induction heating and quenching device includes a cooling tank and an induction heating device arranged above the cooling tank. The induction heating device includes a support mechanism for placing and positioning the crankshaft and a lifting mechanism for driving the support mechanism to lift; several opening and closing induction devices are arranged on both sides of the support mechanism.

[0007] Preferably, the support mechanism includes two support blocks. Opposite sides of the two support blocks are provided with placement grooves, and limiting rods arranged along the axial direction of the crankshaft are provided on both sides of the placement grooves.

[0008] Preferably, sliding grooves are provided on both sides of the placement groove. The sliding grooves are horizontally arranged, and first sliders are slidably connected in the sliding grooves. The limiting rods are arranged on the first sliders. A blocking rod vertically penetrates through the support block movably, and the lower end of the blocking rod extends into the sliding groove to keep the first slider at one end of the sliding groove close to the placement groove.

[0009] Preferably, the lifting mechanism includes a support frame, a winch is installed on the support frame, a lifting rope connected to the support block is wound around the winch, at least two guide rods vertically penetrate through each support block, the upper end of the guide rod is fixedly connected to the support frame, and the lower end of the guide rod is fixedly connected to the bottom of the cooling tank.

[0010] Preferably, a touch rod is arranged on the guide rod, and a contact switch for controlling the winch to stop working is arranged on the lower surface of the touch rod.

[0011] Preferably, an opening is formed in the support frame.

[0012] Preferably, the opening and closing induction device includes a moving platform, the moving platform is connected with a first telescopic rod for driving the moving platform to approach the crankshaft, and an induction semi-ring is arranged on the moving platform.

[0013] Preferably, the moving platform includes a mounting frame and rollers arranged at the bottom of the mounting frame, a second telescopic rod is vertically arranged on the mounting frame, the telescopic end of the second telescopic rod is hinged with a second slider, the second slider is slidably connected with a connecting plate, the induction semi-ring is arranged on the connecting plate, at least two arc-shaped chutes are arranged on the connecting plate, and a sliding rod extending into the arc-shaped chutes is arranged on the mounting frame.

[0014] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0015] A support mechanism is arranged above the cooling tank to support and position the crankshaft, and then the connecting rod journal is accurately aligned by the opening and closing induction device for induction heating. After heating, the crankshaft is lowered into the cooling tank by the lifting mechanism for quenching, avoiding the risk of scalding caused by hoisting the heated crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required to be used in the embodiment will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a front view sectional structure schematic diagram provided by the embodiment of the present invention;

[0018] Figure 2 It is a side view sectional structure schematic diagram provided by the embodiment of the present invention;

[0019] Figure 3 It is a structure schematic diagram when the opening and closing induction device of the embodiment of the present invention is in a closed state;

[0020] Figure 4 Schematic diagram of the state of the induction semi-ring deflection provided by the embodiment of the present invention;

[0021] Figure 5 Schematic diagram of the structure of the support mechanism provided by the embodiment of the present invention.

[0022] Icon: 1 - Cooling tank; 2 - Opening and closing induction device; 21 - Mounting frame; 22 - Second telescopic rod; 23 - Second slider; 24 - Connecting plate; 25 - Induction semi-ring; 26 - Roller; 27 - First telescopic rod; 28 - Slide bar; 29 - Arc-shaped chute; 3 - Support block; 31 - Placing groove; 32 - Limit rod; 33 - First slider; 34 - Chute; 35 - Stop bar; 4 - Crankshaft; 41 - End main shaft; 42 - Connecting rod journal; 43 - Balance weight; 5 - Guide rod; 6 - Contact rod; 7 - Support frame; 71 - Winch; 72 - Suspension rope; 73 - Opening. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0025] The following will be combined with Figures 1-5 to describe the present invention in detail.

[0026] Embodiment

[0027] A crankshaft induction heating and quenching device includes a cooling tank 1 and an induction heating device arranged above the cooling tank 1. The induction heating device includes a support mechanism for placing and positioning the crankshaft 4 and a lifting mechanism for driving the support mechanism to lift; several opening and closing induction devices 2 are arranged on both sides of the support mechanism.

[0028] The crankshaft 4 mainly includes end main shafts 41 located at both ends of the crankshaft 4, connecting rod journals 42, and balance weights 43 provided on the crank arms. The cooling tank 1 is filled with coolant. After the crankshaft 4 is placed on the support mechanism, the crankshaft remains stationary. Every two opposite opening and closing induction devices 2 close to heat one of the connecting rod journals 42. After the heating is completed, the opening and closing induction devices 2 separate, and the lifting mechanism lowers the crankshaft 4 into the coolant for cooling treatment.

[0029] The support mechanism includes two support blocks 3. Opposite sides of the two support blocks 3 are provided with placement grooves 31, and limiting rods 32 arranged along the axial direction of the crankshaft 4 are provided on both sides of the placement groove 31. As Figure 1 shown, the end main shafts 41 are placed in the placement grooves 31, so that the support blocks 3 support the crankshaft 4. Since the balance weights 43 are wider than the crank arms, the shape of the crank arms is larger at one end and smaller at the other end. Therefore, two limiting rods 32 are used to limit the balance weights 43, and the smaller end of the crank arm passes through the gap between the two limiting rods 32. Both sides of the balance weights 43 are lapped on the limiting rods 32, preventing the crankshaft 4 from rotating around the end main shafts 41 and maintaining the placement stability of the crankshaft 4. As a result, the connecting rod journals 42 are also maintained between two opposite opening and closing induction devices 2. Compared with the traditional clamping and fixing method, the placement method can complete the positioning of the crankshaft 4 faster and avoid the problem of damage to the surface of the crankshaft 4 due to the large clamping force of the clamping arms.

[0030] To ensure the structural stability of the limiting rods 32, the length of the limiting rods 32 cannot be set too long. Therefore, the limiting rods 32 are set to only limit the balance weights 43 close to the end main shafts 41.

[0031] Sliding grooves 34 are provided on both sides of the placement groove 31. The sliding grooves 34 are horizontally arranged, and first sliders 33 are slidably connected in the sliding grooves 34. The limiting rods 32 are provided on the first sliders 33. A stop rod 35 vertically penetrates through the support block 3, and the lower end of the stop rod 35 extends into the sliding groove 34 to keep the first slider 33 at one end of the sliding groove 34 close to the placement groove 31.

[0032] When the crankshaft 4 is placed on the support block 3 from above the support block 3, the crankshaft 4 may rotate to a certain extent, resulting in the smaller end of the crank arm not being able to pass through the gap between the two limit rods 32 normally. Therefore, a structure that can move left and right is configured for the limit rods 32. Before placing the crankshaft 4, the limit rods 32 are slid to one end of the chute 34 away from the placement groove 31 to increase the gap between the two limit rods 32, facilitating the placement of the crankshaft 4. After the end main shaft 41 is placed on the placement groove 31, the crankshaft 4 is rotated and adjusted so that the balance block 43 is located at the upper end of the crank arm, and then the limit rods 32 are slid to one end of the chute 34 close to the placement groove 31 to limit the balance block 43; the provided stop rod 35 prevents the limit rods 32 from moving after being stressed. When the limit rods 32 need to be moved, the stop rod 35 is pulled up.

[0033] The lifting mechanism includes a support frame 7. A hoist 71 is installed on the support frame 7. A lifting rope 72 connected to the support block 3 is wound around the hoist 71. At least two guide rods 5 vertically penetrate each support block 3. The upper end of the guide rod 5 is fixedly connected to the support frame 7, and the lower end of the guide rod 5 is fixedly connected to the bottom of the cooling tank 1.

[0034] The support block 3 moves in the vertical direction under the action of the guide rod 5. The hoist 71 realizes the lowering and lifting of the support block 3 by taking in and releasing the lifting rope 72.

[0035] A touch rod 6 is arranged on the guide rod 5. A contact switch for controlling the hoist 71 to stop working is arranged on the lower surface of the touch rod 6. When the support block 3 moves upward and resets, in order to keep the support block 3 staying in the correct position, the contact switch is set. After the support block 3 reaches the specified height and touches the contact switch, the contact switch controls the hoist 71 to stop the operation of taking in the wire, so that the support block 3 stays in this position.

[0036] The crankshaft 4 is heavy, and some mechanical equipment is needed to place the crankshaft 4 on the support block 3. Since the crankshaft 4 needs to be placed from top to bottom, the best choice is to use a lifting tool. Therefore, in order to facilitate the placement of the crankshaft 4, an opening 73 is opened on the support frame 7, so that the crankshaft 4 can be lowered onto the support block 3 from the opening 73.

[0037] The opening and closing induction device 2 includes a moving platform. The moving platform is connected with a first telescopic rod 27 for driving the moving platform to approach the crankshaft 4. An induction semi-ring 25 is arranged on the moving platform. The opening and closing induction device 2 drives the moving platform to move horizontally through the first telescopic rod 27 to realize the opening and closing of two opposite induction semi-rings 25.

[0038] The mobile platform includes a mounting frame 21 and rollers 26 provided at the bottom of the mounting frame 21. A second telescopic rod 22 is vertically provided on the mounting frame 21. The telescopic end of the second telescopic rod 22 is hinged with a second slider 23. The second slider 23 is slidably connected with a connecting plate 24. An induction semi-ring 25 is provided on the connecting plate 24. At least two arc-shaped chutes 29 are provided on the connecting plate 24. A slide bar 28 extending into the arc-shaped chute 29 is provided on the mounting frame 21.

[0039] The telescopic end of the first telescopic rod 27 is connected to the mounting frame 21. Under the telescopic action of the first telescopic rod 27, the mounting frame 21 moves horizontally by relying on the rollers 26.

[0040] Since there is a certain gap at the junction between the two induction semi-rings 25, during induction heating, there will be a position on the connecting rod journal 42 corresponding to the junction that is not heated to meet the temperature requirements. This will cause defects in the surface structure of this position and affect the structural strength of the entire connecting rod journal 42. Therefore, during heating, the induction semi-ring 25 needs to rotate by a certain angle to heat the connecting rod journal 42 in all directions. The two provided slide bars 28 cooperate with the connecting plate 24 having two arc-shaped chutes 29. The connecting plate 24 can only swing along the radian of the arc-shaped chute 29, so that the induction semi-ring 25 rotates around the connecting rod journal 42. The swing of the connecting plate 24 is realized by the telescopic cooperation of the second telescopic rod 22 and the second slider 23 on the connecting plate 24.

[0041] Such as Figure 4 As shown, when the two induction semi-rings 25 rotate, they need to maintain the enclosure of the connecting rod journal 42. Therefore, one of the second telescopic rods 22 contracts and the other second telescopic rod 22 extends. During induction heating, the two induction semi-rings 25 need to rotate continuously to keep the connecting rod journal 42 evenly heated.

[0042] To ensure that the induction semi-ring 25 does not touch the connecting rod journal 42 and cause damage during rotation, the arc-shaped chute 29 should be an arc-shaped groove centered on the connecting rod journal 42.

[0043] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crankshaft induction heating and quenching device, comprising a cooling tank (1) and an induction heating device arranged above the cooling tank (1). Characterized in that the induction heating device includes a support mechanism for placing and positioning the crankshaft (4) and a lifting mechanism for driving the support mechanism to lift; several opening and closing induction devices (2) are arranged on both sides of the support mechanism; the opening and closing induction device (2) includes a moving platform, the moving platform is connected with a first telescopic rod (27) for driving the moving platform to approach the crankshaft (4), and an induction semi-ring (25) is arranged on the moving platform; the moving platform includes a mounting frame (21) and rollers (26) arranged at the bottom of the mounting frame (21), a second telescopic rod (22) is vertically arranged on the mounting frame (21), the telescopic end of the second telescopic rod (22) is hinged with a second slider (23), the second slider (23) is slidably connected with a connecting plate (24), the induction semi-ring (25) is arranged on the connecting plate (24), at least two arc-shaped chutes (29) are arranged on the connecting plate (24), and a sliding rod (28) extending into the arc-shaped chute (29) is arranged on the mounting frame (21).

2. A crankshaft induction heating and quenching device according to claim 1, Characterized in that the support mechanism includes two support blocks (3), placing grooves (31) are formed on the opposite sides of the two support blocks (3), and limiting rods (32) arranged along the axial direction of the crankshaft (4) are arranged on both sides of the placing groove (31).

3. A crankshaft induction heating and quenching device according to claim 2, Characterized in that chutes (34) are formed on both sides of the placing groove (31), the chutes (34) are horizontally arranged, first sliders (33) are slidably connected in the chutes (34), the limiting rods (32) are arranged on the first sliders (33), a stop rod (35) vertically penetrates through the support block (3) movably, and the lower end of the stop rod (35) extends into the chute (34) to keep the first slider (33) at one end of the chute (34) close to the placing groove (31).

4. A crankshaft induction heating and quenching device according to claim 2, Characterized in that the lifting mechanism includes a support frame (7), a winch (71) is installed on the support frame (7), a lifting rope (72) connected to the support block (3) is wound around the winch (71), at least two guide rods (5) vertically penetrate through each support block (3) movably, the upper ends of the guide rods (5) are fixedly connected to the support frame (7), and the lower ends of the guide rods (5) are fixedly connected to the bottom of the cooling tank (1).

5. A crankshaft induction heating and quenching device according to claim 4, Characterized in that a touch rod (6) is arranged on the guide rod (5), and a touch point switch for controlling the winch (71) to stop working is arranged on the lower surface of the touch rod (6).

6. A crankshaft induction heating and quenching device according to claim 4, Characterized in that an opening (73) is formed on the support frame (7).

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