A ductile iron grinding ball quenching equipment

Abstract

The invention relates to the technical field of quenching equipment, and in particular to a ductile iron grinding ball quenching equipment, comprising a quenching pool body, wherein the bottom inner wall of the quenching pool body is rotatably connected to a first turntable, the lower end outer surface of the quenching pool body is fixedly connected to a motor, the output end of the motor passes through the lower wall of the quenching pool body and is fixedly connected to the first turntable, the upper surface of the first turntable is fixedly connected to a plurality of telescopic units, the plurality of telescopic units are respectively located at the center and around the upper surface of the turntable, the upper parts of the plurality of telescopic units are hinged with an articulated frame, and the upper part of the articulated frame is fixedly connected to a ball receiving unit; the invention solves the problem that, when quenching ductile iron grinding balls, high-temperature grinding balls are usually poured from a quenching frame into a quenching pool through a pouring device, and at this time, the quenching liquid will splash the quenching oil to the area outside the quenching pool due to the sudden fall of the grinding balls and the temperature difference, which not only causes waste but also pollutes the working environment.

Description

Technical Field

[0001] The invention relates to the technical field of quenching equipment, in particular to a ductile iron grinding ball quenching equipment. Background Art

[0002] Ductile iron is a type of cast iron in which carbon is precipitated as spherical graphite through spheroidization and inoculation treatment, and the graphite is distributed in a spherical shape. It has good castability, wear resistance, and machinability. Ductile iron has excellent mechanical properties and process properties, and its mechanical properties can be further improved through heat treatment. During the heat treatment process, normalizing, isothermal quenching and other methods are often used to improve the strength and hardness of ductile iron. Ductile iron grinding balls are mainly used in grinders.

[0003] At present, when quenching ductile iron grinding balls, the high-temperature grinding balls are usually poured from the quenching frame into the quenching pool through a pouring device. At this time, the quenching oil will splash to the area outside the quenching pool due to the sudden fall of the grinding balls, which not only causes waste but also pollutes the working environment.

[0004] In view of this, a ductile iron grinding ball quenching equipment is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a ductile iron grinding ball quenching equipment, which mainly solves the problem that at present, when quenching ductile iron grinding balls, the high-temperature grinding balls are usually poured from the quenching frame into the quenching pool through a pouring device. At this time, the quenching oil will splash to the area outside the quenching pool due to the sudden fall of the grinding balls, which not only causes waste but also pollutes the working environment.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A ductile iron grinding ball quenching device comprises a quenching pool body, wherein the bottom inner wall of the quenching pool body is rotatably connected to a first turntable, the lower outer surface of the quenching pool body is fixedly connected to a motor, the output end of the motor penetrates the lower wall of the quenching pool body and is fixedly connected to the first turntable, the upper surface of the first turntable is fixedly connected to a plurality of telescopic units, the plurality of telescopic units are respectively located at the center and around the upper surface of the turntable, the upper parts of the plurality of telescopic units are all hinged with an articulated frame, and the upper part of the articulated frame is fixedly connected to a ball receiving unit;

[0008] The left and right ends of the upper surface of the quenching tank body are fixedly connected with fans.

[0009] When quenching the ductile iron grinding ball, first start the motor, the motor drives the No. 1 turntable to rotate, the No. 1 turntable drives the telescopic unit to rotate along the axis of the No. 1 turntable, the telescopic unit drives the ball receiving unit to rotate through the hinge frame, at this time, the quenching oil will rotate with the rotation of the above mechanism, at this time, the high-temperature quenching ball falls, and due to the rotation of the quenching oil, the splash of water will be effectively controlled;

[0010] In addition, during the rotation of the quenching oil, on the one hand, the rotating quenching oil will exert a certain degree of offset force on the grinding balls, so that the grinding balls will not directly hit the ball receiving unit, which can play a certain protective role on the ball receiving unit; on the other hand, the rotation of the quenching oil will also make the temperature of the quenching oil more uniform, so that the quenching of the grinding balls is also more uniform, and the hardness of the grinding ball surface is also more uniform;

[0011] By fixing fans at both ends of the upper surface of the quenching pool body, the outer surface of the fan is coated with a waterproof layer to prevent the quenching oil from splashing onto the fan, which would cause short circuit and other dangers to the fan; in the process of the grinding balls falling, the fan is connected to the external power supply, and the fan is started to transport gas to the middle of the quenching pool body, and most of the splashed oil is collected and processed, and the oil falls into the quenching pool body, which effectively prevents the oil from flying out of the quenching pool body, avoiding the waste of quenching oil and the pollution of the working environment.

[0012] Preferably, the ball receiving unit comprises: a No. 1 fixing frame, a No. 2 fixing frame, a pad, a spring, a ball receiving plate and an impurity filter, the upper surface of the articulated frame is fixedly connected to the No. 1 fixing frame, the inner wall of the No. 1 fixing frame is fixedly connected to the No. 2 fixing frame, the lower end of the inner wall of the No. 2 fixing frame is fixedly connected to the pad, a plurality of springs are fixedly connected above the pad, the upper ends of the plurality of springs are fixedly connected to the ball receiving plate, the side surface of the ball receiving plate is slidably connected to the inner wall of the No. 2 fixing frame, and an impurity filter is provided on the upper surface of the No. 1 fixing frame and at the lower end of the No. 2 fixing frame.

[0013] When quenching the ductile iron grinding balls, the telescopic unit drives the No. 1 fixing frame to rotate through the hinge frame, the No. 1 fixing frame drives the No. 2 fixing frame to rotate, the No. 2 fixing frame drives the pad to rotate, the pad drives the ball receiving plate to rotate through the spring, and the spring is provided to provide a buffering effect on the falling grinding balls, and then the ball receiving plate 65 will drive the grinding balls that fall first to roll, providing a buffering space for the grinding balls that fall later, so that the surface of the grinding balls will not be concave, thereby ensuring the quality of grinding ball quenching;

[0014] On the other hand, when all the grinding balls fall on the ball receiving plate, the grinding balls rotate to make friction and collision between each other and friction between the grinding balls and the ball receiving plate, so as to clean the impurities on the surface of the grinding balls, further improving the quality of the grinding balls after quenching. There are multiple through holes at the bottom of the No. 1 fixed frame to facilitate the outflow of oil.

[0015] After quenching is completed, multiple sets of telescopic units extend upward to push the ball receiving units out of the quenching pool body for collection.

[0016] Preferably, a plurality of No. 1 through holes are formed around the No. 2 fixing frame.

[0017] During the extension and retraction of the telescopic unit, a plurality of No. 1 through holes are opened around the No. 2 fixing frame, so that during the rising process, the quenching oil can be transported up and down through the No. 1 through holes, and oil leakage will not occur during the rising process;

[0018] At the same time, after the quenching is completed, the quenching oil is collected. At this time, the telescopic unit pushes the ball receiving unit upward. At this time, the impurities will fall into the impurity filter through the No. 1 through hole. At the same time, the ball receiving unit is rotated after being pushed out, and the centrifugal force is used to throw the impurities remaining on the upper surface of the ball receiving plate to the vicinity of the No. 1 through hole. Manual work only needs to be done simply to clean it, saving manpower and material resources.

[0019] Preferably, a discharge port is provided at the right end of the No. 1 fixing frame.

[0020] When the grinding balls are collected after quenching, the motor stops working. When the telescopic unit pushes out the ball receiving unit, the height of the No. 1 fixed frame above the ball receiving plate is greater than the diameter of the grinding balls, so that the grinding balls will not fall out. The telescopic unit on the left is lower than the telescopic unit on the right. At this time, the grinding balls are all located on the left side of the ball receiving plate. After being pushed out, a discharge port is opened at the right end of the No. 1 fixed frame, and the telescopic unit on the left end continues to extend, so that the telescopic unit on the left is higher than the telescopic unit on the right, and the grinding balls roll out. This method is controlled by PLC, which greatly saves manpower.

[0021] Preferably, a second through hole is opened inside the side wall of the quenching tank body.

[0022] During the rising process of the ball receiving unit, a No. 2 through hole is opened inside the side wall of the quenching pool body, and the quenching oil can be transported up and down through the No. 2 through hole, which will not cause oil leakage during the rising process; further preventing the waste of quenching oil and the pollution of the working environment by quenching oil.

[0023] Preferably, the telescopic units are all hydraulic telescopic rods.

[0024] During the quenching process, the telescopic units are all hydraulic telescopic rods, which are powerful, low-noise and can be precisely controlled, meeting the needs of this invention.

[0025] Preferably, a sealing ring is provided at the lower end of the quenching tank body and at the position in contact with the output end of the motor.

[0026] During the operation of the motor, a sealing ring is provided at the lower end of the quenching tank body and at a position in contact with the output end of the motor, thereby effectively preventing the leakage of quenching oil from damaging the motor.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. By setting the motor, No. 1 turntable, telescopic unit and ball receiving unit, the quenching oil will rotate with the rotation of the above mechanisms. At this time, the high-temperature quenching balls fall down. Due to the rotation of the quenching oil, the splash of water can be effectively controlled; a buffering effect is provided for the falling grinding balls, so that the surface of the grinding balls will not be dented, thereby ensuring the quality of grinding ball quenching; on the other hand, when all the grinding balls fall on the ball receiving plate, the grinding balls are rotated to cause friction and collision between them and friction between the grinding balls and the ball receiving plate, thereby cleaning the impurities on the surface of the grinding balls, further improving the quality of the grinding balls after quenching;

[0029] 2. By fixing fans on the left and right ends of the upper surface of the quenching pool body, the fan is connected to an external power supply during the falling process of the grinding balls, and the fan is started to transport gas to the middle of the quenching pool body to collect and process the splashed oil, which falls into the quenching pool body, effectively preventing the oil from flying out of the quenching pool body, avoiding the waste of quenching oil and pollution to the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0032] Figure 2 It is a left side view of the present invention;

[0033] Figure 3 For the present invention Figure 1 AA section diagram of .

[0034] In the figure: quenching pool body 1, No. 1 turntable 2, motor 3, telescopic unit 4, articulated frame 5, ball receiving unit 6, No. 1 fixing frame 61, No. 2 fixing frame 62, pad 63, spring 64, ball receiving plate 65, impurity filter 66, fan 7, No. 1 through hole 8, discharge port 9, No. 2 through hole 10, sealing ring 11. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 3 , the present invention provides a technical solution:

[0037] A ductile iron grinding ball quenching device comprises a quenching pool body 1, the bottom inner wall of the quenching pool body 1 is rotatably connected to a first turntable 2, the lower outer surface of the quenching pool body 1 is fixedly connected to a motor 3, the output end of the motor 3 passes through the lower wall of the quenching pool body 1 and is fixedly connected to the first turntable 2, the upper surface of the first turntable 2 is fixedly connected to a plurality of telescopic units 4, the plurality of telescopic units 4 are respectively located at the center and around the upper surface of the turntable, the upper parts of the plurality of telescopic units 4 are all hinged with an articulated frame 5, and the upper part of the articulated frame 5 is fixedly connected to a ball receiving unit 6;

[0038] Fans 7 are fixedly connected to the left and right ends of the upper surface of the quenching tank body 1 .

[0039] When quenching the ductile iron grinding ball, first start the motor 3, the motor 3 drives the No. 1 turntable 2 to rotate, the No. 1 turntable 2 drives the telescopic unit 4 to rotate along the axis of the No. 1 turntable 2, the telescopic unit 4 drives the ball receiving unit 6 to rotate through the hinge frame 5, at this time, the quenching oil will rotate with the rotation of the above mechanism, at this time, the high-temperature quenching ball falls, and due to the rotation of the quenching oil, the splash of water will be effectively controlled;

[0040] In addition, during the rotation of the quenching oil, on the one hand, the rotating quenching oil will exert a certain degree of offset force on the grinding balls, so that the grinding balls will not directly hit the ball receiving unit 6, which can play a certain protective role on the ball receiving unit 6; on the other hand, the rotation of the quenching oil will also make the temperature of the quenching oil more uniform, so that the quenching of the grinding balls is also more uniform, and the hardness of the surface of the grinding balls is also more uniform;

[0041] By fixing fans 7 at both ends of the upper surface of the quenching pool body 1, and coating the outer surface of the fan 7 with a waterproof layer, the quenching oil is prevented from splashing onto the fan 7, which would cause short circuit and other dangers to the fan 7. In the process of the grinding balls falling, the fan 7 is connected to the external power supply, and the fan 7 is started to transport gas to the middle of the quenching pool body 1, so that most of the splashed oil is collected and processed, and the oil falls into the quenching pool body 1, which effectively prevents the oil from flying out of the quenching pool body 1, avoiding the waste of quenching oil and the pollution of the working environment.

[0042] As an embodiment of the present invention, the ball receiving unit 6 includes: a No. 1 fixing frame 61, a No. 2 fixing frame 62, a pad 63, a spring 64, a ball receiving plate 65 and an impurity filter 66, the upper surface of the articulated frame 5 is fixedly connected to the No. 1 fixing frame 61, the inner wall of the No. 1 fixing frame 61 is fixedly connected to the No. 2 fixing frame 62, the lower end of the inner wall of the No. 2 fixing frame 62 is fixedly connected to the pad 63, a plurality of springs 64 are fixedly connected above the pad 63, the upper ends of the plurality of springs 64 are fixedly connected to the ball receiving plate 65, the side surface of the ball receiving plate 65 is slidably connected to the inner wall of the No. 2 fixing frame 62, and an impurity filter 66 is provided on the upper surface of the No. 1 fixing frame 61 and at the lower end of the No. 2 fixing frame 62.

[0043] When quenching the ductile iron grinding balls, the telescopic unit 4 drives the first fixing frame 61 to rotate through the hinge frame 5, the first fixing frame 61 drives the second fixing frame 62 to rotate, the second fixing frame 62 drives the pad 63 to rotate, the pad 63 drives the ball receiving plate 65 to rotate through the spring 64, and the spring 64 is provided to buffer the grinding balls that fall first, and then the ball receiving plate 65 drives the grinding balls that fall first to roll, providing a buffer space for the grinding balls that fall later, so that the surface of the grinding balls will not be concave, thereby ensuring the quality of grinding ball quenching;

[0044] On the other hand, when all the grinding balls fall on the ball receiving plate 65, the grinding balls are rotated to cause friction and collision between each other and friction between the grinding balls and the ball receiving plate 65, so as to clean the impurities on the surface of the grinding balls, further improving the quality of the grinding balls after quenching. A plurality of through holes are provided at the bottom of the first fixing frame 61 to facilitate the outflow of oil.

[0045] After quenching is completed, the multiple groups of telescopic units 4 are extended upward to push the ball receiving units 6 out of the quenching pool body 1 for collection.

[0046] As an implementation mode of the present invention, a plurality of No. 1 through holes 8 are formed around the No. 2 fixing frame 62 .

[0047] During the extension and retraction of the telescopic unit 4, a plurality of No. 1 through holes 8 are provided around the No. 2 fixing frame 62, so that during the ascending process, the quenching oil can be transported up and down through the No. 1 through holes 8, and oil leakage will not occur during the ascending process;

[0048] At the same time, after quenching is completed, the quenching oil is collected. At this time, the telescopic unit 4 pushes the ball receiving unit 6 upward. At this time, impurities will fall into the impurity filter 66 through the No. 1 through hole 8. At the same time, the ball receiving unit 6 is rotated after being pushed out, and the centrifugal force is used to throw the impurities remaining on the surface of the ball receiving plate 65 to the vicinity of the No. 1 through hole 8. Manual work only needs to be done simply to clean it, saving manpower and material resources.

[0049] As an embodiment of the present invention, a discharge port 9 is provided at the right end of the first fixing frame 61 .

[0050] When the grinding balls are collected after quenching, the motor 3 stops working, and when the telescopic unit 4 pushes out the ball receiving unit 6, the No. 1 fixed frame 61 is located above the ball receiving plate 65 at a height greater than the diameter of the grinding balls, so that the grinding balls will not fall out. The telescopic unit 4 on the left is lower than the telescopic unit 4 on the right. At this time, the grinding balls are all located on the left side of the ball receiving plate 65. After being pushed out, a discharge port 9 is opened at the right end of the No. 1 fixed frame 61, and the telescopic unit 4 at the left end continues to extend, so that the telescopic unit 4 on the left is higher than the telescopic unit 4 on the right, and the grinding balls roll out; this method is controlled by PLC, which greatly saves manpower.

[0051] As an embodiment of the present invention, a second through hole 10 is opened inside the side wall of the quenching tank body 1 .

[0052] During the ascending process of the ball receiving unit 6, a second through hole 10 is opened inside the side wall of the quenching pool body 1, so that the quenching oil can be transported up and down through the second through hole 10, and oil leakage will not occur during the ascending process; this further prevents the waste of quenching oil and the pollution of the working environment by the quenching oil.

[0053] As an implementation mode of the present invention, the telescopic units 4 are all hydraulic telescopic rods.

[0054] During the quenching process, the telescopic units 4 are all hydraulic telescopic rods, which are powerful, quiet and can be precisely controlled, thus meeting the needs of the present invention.

[0055] As an embodiment of the present invention, a sealing ring 11 is provided at the lower end of the quenching tank body 1 and at the position in contact with the output end of the motor.

[0056] During the operation of the motor 7 , a sealing ring 11 is provided at the lower end of the quenching tank body 1 and at a position in contact with the output end of the motor 7 , thereby effectively preventing the leakage of the quenching oil from damaging the motor.

[0057] Working principle: When quenching the ductile iron grinding ball, first start the motor 3, the motor 3 drives the No. 1 turntable 2 to rotate, the No. 1 turntable 2 drives the telescopic unit 4 to rotate along the axis of the No. 1 turntable 2, the telescopic unit 4 drives the ball receiving unit 6 to rotate through the hinge frame 5, at this time, the quenching oil will rotate with the rotation of the above mechanism, at this time, the high-temperature quenching ball falls, and due to the rotation of the quenching oil, the splash of water will be effectively controlled;

[0058] In addition, during the rotation of the quenching oil, on the one hand, the rotating quenching oil will exert a certain degree of offset force on the grinding balls, so that the grinding balls will not directly hit the ball receiving unit 6, which can play a certain protective role on the ball receiving unit 6; on the other hand, the rotation of the quenching oil will also make the temperature of the quenching oil more uniform, so that the quenching of the grinding balls is also more uniform, and the hardness of the surface of the grinding balls is also more uniform;

[0059] When quenching the ductile iron grinding balls, the telescopic unit 4 drives the first fixing frame 61 to rotate through the hinge frame 5, the first fixing frame 61 drives the second fixing frame 62 to rotate, the second fixing frame 62 drives the pad 63 to rotate, the pad 63 drives the ball receiving plate 65 to rotate through the spring 64, and the spring 64 is provided to buffer the grinding balls that fall first, and then the ball receiving plate 65 drives the grinding balls that fall first to roll, providing a buffer space for the grinding balls that fall later, so that the surface of the grinding balls will not be concave, thereby ensuring the quality of grinding ball quenching;

[0060] On the other hand, when all the grinding balls fall on the ball receiving plate 65, the grinding balls rotate to cause friction and collision between each other and friction between the grinding balls and the ball receiving plate 65, thereby cleaning the impurities on the surface of the grinding balls, further improving the quality of the grinding balls after quenching.

[0061] After quenching is completed, the multiple telescopic units 4 extend upward to push the ball receiving units 6 out of the quenching pool body 1 for collection;

[0062] When the grinding balls are collected after quenching, the motor 3 stops working, and when the telescopic unit 4 pushes out the ball receiving unit 6, the No. 1 fixed frame 61 is located above the ball receiving plate 65 at a height greater than the diameter of the grinding balls, so that the grinding balls will not fall out. The telescopic unit 4 on the left is lower than the telescopic unit 4 on the right. At this time, the grinding balls are all located on the left side of the ball receiving plate 65. After being pushed out, a discharge port 9 is opened at the right end of the No. 1 fixed frame 61, and the telescopic unit 4 at the left end continues to extend, so that the telescopic unit 4 on the left is higher than the telescopic unit 4 on the right, and the grinding balls roll out; this method is controlled by PLC, which greatly saves manpower.

[0063] By fixing fans 7 at both ends of the upper surface of the quenching pool body 1, and coating the outer surface of the fan 7 with a waterproof layer, the quenching oil is prevented from splashing onto the fan 7, which would cause short circuit and other dangers to the fan 7. In the process of the grinding balls falling, the fan 7 is connected to the external power supply, and the fan 7 is started to transport gas to the middle of the quenching pool body 1, so that most of the splashed oil is collected and processed, and the oil falls into the quenching pool body 1, which effectively prevents the oil from flying out of the quenching pool body 1, avoiding the waste of quenching oil and the pollution of the working environment.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ductile iron grinding ball quenching device, comprising a quenching tank body (1), characterized in that: The inner wall of the bottom end of the quenching pool body (1) is rotatably connected to a first turntable (2); the outer surface of the lower end of the quenching pool body (1) is fixedly connected to a motor (3); the output end of the motor (3) passes through the lower wall of the quenching pool body (1) and is fixedly connected to the first turntable (2); the upper surface of the first turntable (2) is fixedly connected to a plurality of telescopic units (4); the plurality of telescopic units (4) are respectively located at the center and around the upper surface of the turntable; the upper parts of the plurality of telescopic units (4) are all hingedly connected to an articulated frame (5); the upper part of the articulated frame (5) is fixedly connected to a ball receiving unit (6); Fans (7) are fixedly connected to the left and right ends of the upper surface of the quenching tank body (1); The fan 7 is fixedly connected to the left and right ends of the upper surface of the quenching pool body 1, and the outer surface of the fan 7 is coated with a waterproof layer to prevent the quenching oil from splashing onto the fan 7; during the falling process of the grinding balls, the fan 7 is connected to the external power supply, and the fan 7 is started to transport gas to the middle of the quenching pool body 1; The ball receiving unit (6) comprises: a No. 1 fixing frame (61), a No. 2 fixing frame (62), a pad (63), a spring (64), a ball receiving plate (65) and an impurity filter (66); the upper surface of the hinged frame (5) is fixedly connected to the No. 1 fixing frame (61); the inner wall of the No. 1 fixing frame (61) is fixedly connected to the No. 2 fixing frame (62); the lower end of the inner wall of the No. 2 fixing frame (62) is fixedly connected to the pad (63); the upper part of the pad (63) is fixedly connected to a plurality of springs (64); the upper ends of the plurality of springs (64) are fixedly connected to the ball receiving plate (65); the side surface of the ball receiving plate (65) is slidably connected to the inner wall of the No. 2 fixing frame (62); and the impurity filter (66) is provided on the upper surface of the No. 1 fixing frame (61) and at the lower end of the No. 2 fixing frame (62); The second fixing frame (62) is provided with a plurality of first through holes (8) around its periphery; A second through hole (10) is provided inside the side wall of the quenching tank body (1); The quenching oil can be transported up and down through the second through hole (10) without causing oil leakage during the rising process.

2. A ductile iron grinding ball quenching equipment according to claim 1, characterized in that: A discharge port (9) is provided at the right end of the No. 1 fixing frame (61).

3. A ductile iron grinding ball quenching equipment according to claim 1, characterized in that: The telescopic units (4) are all hydraulic telescopic rods.

4. A ductile iron grinding ball quenching equipment according to claim 1, characterized in that: A sealing ring (11) is provided at the lower end of the quenching tank body (1) and at a position in contact with the output end of the motor.

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