Cooling device for heat treatment of step pin bush

Abstract

The utility model relates to a cooling device for heat treatment of a step pin bush, and belongs to the technical field of step pin bush production. Comprising a cooling pond, a cooling cylinder mounting frame is mounted in the cooling pond, an overturning type cooling cylinder is rotationally mounted at the top of the cooling cylinder mounting frame, a rotary driving mechanism enables the overturning type cooling cylinder to swing and rotate in a reciprocating mode in a vertical plane, a feeding sliding way is arranged on one side of the overturning type cooling cylinder, and a discharging sliding way is arranged on the other side of the overturning type cooling cylinder. The turnover type cooling cylinder is arranged on one side of the cooling pond and used for receiving materials discharged from the feeding slide way, a discharging conveying mechanism is arranged on the other side of the turnover type cooling cylinder, a discharging slide way used for receiving the materials discharged from the turnover type cooling cylinder is arranged at one end of the discharging conveying mechanism, and the other end of the discharging conveying mechanism extends to the outer side of the cooling pond. Compared with the prior art, the cooling device has the advantages that internal cooling and external cooling are conducted at the same time, water spraying cooling can be accurately conducted, cooling efficiency is improved, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The utility model relates to a cooling device for heat treatment of a stepped pin sleeve, belonging to the technical field of stepped pin sleeve production. Background Technique

[0002] Such as Figure 6 The shown stepped pin sleeve has a hollow inner hole and a stepped outer wall, and is a component used in cooperation with a pin shaft. It is widely used in places with movable arms such as construction machinery (excavators, bulldozers), automobiles, trains, and ships. During the production process of the pin sleeve, quenching is required. During the quenching process, the pin sleeve needs to be quenched evenly, so as to reduce the probability of uneven surface hardness and local soft spots of the pin sleeve.

[0003] After retrieval, a patent with the patent number 202020051253.2 discloses a heat treatment quenching cooling pool. It includes an alloy isolation net plate, a shunt pipe, a collecting cavity, a first protection net, a high-speed fan, a circulating water pump, a dispersion pipe, and a spraying seat. A collecting cavity is opened on the lower side inside the cooling pool, an alloy isolation net plate is installed above the collecting cavity, a first protection net is installed on the lower side of the left end face of the cooling pool, a high-speed fan is assembled on the right side of the first protection net, spraying seats are symmetrically welded on the left and right sides of the inner wall of the cooling pool, a dispersion pipe is installed inside the spraying seat, and a shunt pipe is connected to the left side of the annular side of the dispersion pipe. This design solves the problems of slow cooling speed and low efficiency of the original cooling pool, which affect the quenching efficiency.

[0004] Although the above patent can achieve the function of heat treatment quenching cooling, the current technology has incomplete considerations and has the following disadvantages: when the stepped pin sleeve is water quenched, the inner and outer surfaces are cooled unevenly, which has a great impact on the cracking and uneven cross-sectional hardness of the stepped pin sleeve after water quenching.

[0005] To solve one of the above problems, there is an urgent need for a cooling device for heat treatment of a stepped pin sleeve. Content of the Utility Model

[0006] According to the above deficiencies in the prior art, the technical problem to be solved by the utility model is: since the cracking and uneven cross-sectional hardness of the stepped pin sleeve during water quenching are mostly caused by uneven cooling of the inner and outer surfaces during water quenching, how to achieve the effect of controlling the cooling speed of the inner and outer surfaces of the stepped pin sleeve. For this purpose, a cooling device for heat treatment of a stepped pin sleeve is provided.

[0007] The cooling device for heat treatment of the stepped pin sleeve described in the utility model includes a cooling pool, and is characterized in that: a cooling cylinder mounting frame is installed in the cooling pool, a flip - type cooling cylinder is rotatably mounted at the top of the cooling cylinder mounting frame, the top of the flip - type cooling cylinder is open, and the inside is a cavity for accommodating the stepped pin sleeve. It also includes a water pump for supplying coolant to the flip - type cooling cylinder, and a rotation drive mechanism for driving the flip - type cooling cylinder to rotate to change the flip angle of the flip - type cooling cylinder. The rotation drive mechanism enables the flip - type cooling cylinder to perform reciprocating swinging in the vertical plane. A feeding chute is arranged on one side of the flip - type cooling cylinder, the flip - type cooling cylinder receives the discharge from the feeding chute, and a discharge conveying mechanism is arranged on the other side of the flip - type cooling cylinder. One end of the discharge conveying mechanism is provided with a discharge chute for receiving the discharge from the flip - type cooling cylinder, and the other end of the discharge conveying mechanism extends to the outside of the cooling pool.

[0008] The cooling pool is internally provided with coolant for heat - treating the stepped pin sleeve. The coolant in the cooling pool is continuously injected into the flip - type cooling cylinder by the water pump. The excess coolant in the flip - type cooling cylinder can overflow back into the cooling pool through the top opening of the flip - type cooling cylinder. After the stepped pin sleeve is heat - treated, the stepped pin sleeve to be cooled is transferred to the feeding chute. The opening of the flip - type cooling cylinder faces the bottom end of the feeding chute. Under the action of gravity, the stepped pin sleeve on the feeding chute slides into the flip - type cooling cylinder and is cooled in the flip - type cooling cylinder. At the same time, the rotation drive mechanism drives the flip - type cooling cylinder to rotate, so that the opening of the flip - type cooling cylinder is switched to face the discharge chute. The stepped pin sleeve in the flip - type cooling cylinder slides onto the discharge chute through the flip - type cooling cylinder. At the same time, the heated coolant in the flip - type cooling cylinder is discharged through the top opening of the flip - type cooling cylinder. Then, the stepped pin sleeve on the discharge chute is transferred to the discharge conveying mechanism under the action of gravity, and the discharge conveying mechanism can transfer the cooled stepped pin sleeve from the feeding side of the discharge conveying mechanism to the discharge side outside the cooling pool, completing the cooling of the stepped pin sleeve.

[0009] Preferably, the cooling pool includes a rectangular bottom plate, and four groups of side plates are enclosed around the rectangular bottom plate to form a cooling pool for storing coolant.

[0010] Preferably, the feeding chute includes an inclined chute body A, the chute body A is processed by angle steel, and the chute body A is fixed above the inside of the cooling pool through a chute support frame.

[0011] Preferably, the flip - type cooling cylinder includes an outer cylinder body and an inner cylinder body arranged coaxially. The inner cylinder body is located inside the outer cylinder body, and there is a preset water - passing gap between the inner wall of the outer cylinder body and the outer wall of the inner cylinder body. There is also a preset water - passing gap between the outer bottom plate of the outer cylinder body and the inner bottom plate of the inner cylinder body. The tops of the outer cylinder body and the inner cylinder body are connected by an end - sealing ring body. A water - spraying pipe is installed at the center of the inner bottom plate. The bottom end of the water - spraying pipe is communicated with the preset water - passing gap. The upper end of the water - spraying pipe is a sealed end. Spraying holes are opened on the pipe wall of the water - spraying pipe and the cylinder wall of the inner cylinder body. On both sides of the outer wall of the outer cylinder body, a horizontally arranged second rotating shaft and a first rotating shaft are symmetrically connected. The second rotating shaft and the first rotating shaft are respectively rotatably installed on the cooling - cylinder mounting rack through corresponding bearing A and bearing seat A. An axial inner channel is opened along the length direction of the first rotating shaft at the center of the first rotating shaft. One end of the axial inner channel is communicated with the preset water - passing gap inside the outer cylinder body, and the other end of the axial inner channel is communicated with the water outlet of the water pump.

[0012] The coolant provided by the water pump enters the preset water - passing gap between the outer cylinder body and the inner cylinder body through the axial inner channel, and then sprays out from the spraying holes on the inner cylinder body and the water - spraying pipe respectively. After the stepped pin sleeve to be cooled is adjusted into the outer cylinder body, the water - spraying pipe will be inserted into the stepped hole at the center of the stepped pin sleeve, so that the stepped pin sleeve will be located between the water - spraying pipe and the inner cylinder body. The spraying holes on the water - spraying pipe and the inner cylinder body spray water to cool the inner wall and the outer wall of the stepped pin sleeve respectively. This is a way of simultaneous internal and external cooling, which can accurately spray water for cooling. At the same time, the coolant in the inner cylinder body can also be quickly circulated and updated under the continuous supply of the water pump, improving the cooling efficiency and achieving the effect of energy saving.

[0013] Preferably, the connecting water pipe between the water pump and the axial inner channel is a rubber pipe.

[0014] Preferably, a rotating water pipe joint is installed at the end of the first rotating shaft. The rotating water pipe joint is communicated with the water outlet of the water pump through a connecting water pipe. The water pump is located in the cooling pool, and the liquid level in the cooling pool is higher than the water inlet of the water pump.

[0015] Preferably, the cooling - cylinder mounting rack includes two groups symmetrically arranged, which are respectively used to support the bearing seats A on the first rotating shaft and the second rotating shaft.

[0016] Preferably, the rotation driving mechanism includes an upper sprocket installed at the end of the second rotating shaft. A lower rotating shaft is arranged below the second rotating shaft, and a lower sprocket is installed on the lower rotating shaft. A chain is wound between the upper sprocket and the lower sprocket. The lower rotating shaft is rotatably installed at the bottom of the cooling - cylinder mounting rack through corresponding bearing B and bearing seat B. A driving cylinder is also hinged on the cooling - cylinder mounting rack, and the telescopic end of the driving cylinder is connected to one side of the chain.

[0017] By controlling the shortening of the driving cylinder, the driving cylinder pulls one side of the chain downward and the other side of the chain upward, causing the second rotating shaft to rotate counterclockwise, so that the opening of the flip - type cooling cylinder is switched to face the discharge chute; by controlling the elongation of the driving cylinder, the driving cylinder pushes one side of the chain upward and the other side of the chain downward, causing the second rotating shaft to rotate clockwise, so that the opening of the flip - type cooling cylinder is switched to the feeding chute, realizing that the rotary driving mechanism makes the flip - type cooling cylinder swing reciprocally in the vertical plane.

[0018] A proximity sensor for sensing the incoming material can be arranged on one side of the feeding chute. The proximity sensor is electrically connected to the input end of the controller. The output end of the controller is connected to the solenoid valve that controls the expansion and contraction of the driving cylinder. The driving cylinder is communicated with the air source through the solenoid valve. The solenoid valve is a three - position four - way reversing valve. The stepped pin sleeve is sleeved on the feeding chute for intermittent feeding. When the proximity sensor senses the incoming material, the controller controls the driving cylinder to elongate, so that the opening of the flip - type cooling cylinder is switched to the feeding chute for receiving the material, and then controls the driving cylinder to shorten, and the flip - type cooling cylinder discharges the material. The controller is an existing PLC controller or a single - chip microcomputer.

[0019] Preferably, the discharge conveying mechanism is an existing chain conveyor, driven by a self - contained reduction motor. The discharge chute is a chute body B arranged obliquely. The chute body B is processed by angle steel, and the end of the chute body B is fixed on the discharge conveying mechanism and / or the cooling cylinder mounting frame.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] For the cooling device for heat treatment of the stepped pin sleeve of the utility model, the cooling liquid in the cooling pool is continuously injected into the flip - type cooling cylinder by a water pump. The excess cooling liquid in the flip - type cooling cylinder can overflow back into the cooling pool through the top opening of the flip - type cooling cylinder, realizing the rapid replacement of the cooling water around the stepped pin sleeve and controlling the synchronous cooling speed of the inner and outer surfaces of the stepped pin sleeve.

[0022] For the cooling device for heat treatment of the stepped pin sleeve of the utility model, after the stepped pin sleeve to be cooled is transferred into the outer cylinder body, the spray pipe will be inserted into the stepped hole in the center of the stepped pin sleeve, so that the stepped pin sleeve is located between the spray pipe and the inner cylinder body. The spray holes on the spray pipe and the inner cylinder body spray water to cool the inner wall and the outer wall of the stepped pin sleeve respectively. It is a way of simultaneous internal and external cooling, which can accurately spray water for cooling. At the same time, the cooling liquid in the inner cylinder body can also be quickly circulated and updated under the continuous supply of the water pump, improving the cooling efficiency and achieving the effect of energy saving. Description of the Drawings

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 Structural schematic of the present utility model Figure 1 (The opening of the flip - type cooling cylinder faces the feeding chute);

[0025] Figure 2 Structural schematic of the present utility model Figure 2 (The opening of the flip - type cooling cylinder faces upward);

[0026] Figure 3 Structural schematic of the present utility model Figure 3 (The opening of the flip - type cooling cylinder faces the discharge chute);

[0027] Figure 4 Structural schematic diagram of the flip - type cooling cylinder of the present utility model;

[0028] Figure 5 Structural schematic diagram of the rotation drive mechanism of the present utility model;

[0029] Figure 6 Structural schematic diagram of the stepped pin sleeve in the flip - type cooling cylinder of the present utility model;

[0030] In the figure: 1. Cooling pool; 2. Feeding chute; 3. Discharge chute; 4. Discharge conveying mechanism; 5. Flip - type cooling cylinder; 5.1 Outer cylinder; 5.2 Inner cylinder; 5.3 End sealing ring body; 5.4 Outer cylinder bottom plate; 5.5 Water spray pipe; 5.6 First rotating shaft; 5.7 Second rotating shaft; 5.8 Inner channel of the shaft; 5.9 Inner cylinder bottom plate; 5.10 Water spray holes; 5.11 Bearing seat A; 6. Cooling cylinder mounting frame; 7. Rotation drive mechanism; 7.1 Upper sprocket; 7.2 Lower sprocket; 7.3 Chain; 7.4 Lower rotating shaft; 7.5 Driving cylinder; 8. Water pump; 9. Rotating water pipe joint; 10. Stepped pin sleeve. Specific embodiments

[0031] The following further describes the present utility model in conjunction with the drawings: The following further illustrates the present utility model through specific embodiments, but it is not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present utility model.

[0032] Example 1, as Figures 1-3As shown in the figure, the cooling device for heat treatment of the stepped pin sleeve includes a cooling pool 1. A cooling cylinder mounting frame 6 is installed in the cooling pool 1. A flip-type cooling cylinder 5 is rotatably mounted on the top of the cooling cylinder mounting frame 6. The flip-type cooling cylinder 5 has an opening at the top and a cavity inside for accommodating the stepped pin sleeve. It also includes a water pump 8 for supplying coolant to the flip-type cooling cylinder 5, and a rotation drive mechanism 7 for driving the flip-type cooling cylinder 5 to rotate to change the flipping angle of the flip-type cooling cylinder 5. The rotation drive mechanism 7 causes the flip-type cooling cylinder 5 to swing reciprocally in the vertical plane. A feeding chute 2 is arranged on one side of the flip-type cooling cylinder 5, and the flip-type cooling cylinder 5 receives the material discharged from the feeding chute 2. An output conveying mechanism 4 is arranged on the other side of the flip-type cooling cylinder 5. One end of the output conveying mechanism 4 is provided with an output chute 3 for receiving the material discharged from the flip-type cooling cylinder 5, and the other end of the output conveying mechanism 4 extends to the outside of the cooling pool 1.

[0033] The cooling pool 1 is internally provided with coolant for heat treatment of the stepped pin sleeve 10. The coolant in the cooling pool 1 is continuously injected into the flip-type cooling cylinder 5 by the water pump 8. The excess coolant in the flip-type cooling cylinder 5 can overflow back into the cooling pool 1 through the opening at the top of the flip-type cooling cylinder 5. After heat treatment of the stepped pin sleeve, the stepped pin sleeve to be cooled is transferred to the feeding chute 2. The opening of the flip-type cooling cylinder 5 faces the bottom end of the feeding chute 2. Figure 1 As shown in the figure, under the action of gravity, the stepped pin sleeve on the feeding chute 2 slides into the flip-type cooling cylinder 5 and is cooled in the flip-type cooling cylinder 5. At the same time, the rotation drive mechanism 7 drives the flip-type cooling cylinder 5 to rotate, so that the opening of the flip-type cooling cylinder 5 switches to face the output chute 3. Figure 1 From the state of Figure 2 to the state of Figure 3 and then to the state of Figure 3 The stepped pin sleeve in the flip-type cooling cylinder 5 slides into the output chute 3 through the flip-type cooling cylinder 5. At the same time, the heated coolant in the flip-type cooling cylinder 5 is discharged through the opening at the top of the flip-type cooling cylinder 5. Then, the stepped pin sleeve 10 on the output chute 3 is transferred to the output conveying mechanism 4 under the action of gravity. The output conveying mechanism 4 can transfer the cooled stepped pin sleeve from the feeding side of the output conveying mechanism 4 to the output side outside the cooling pool 1, completing the cooling of the stepped pin sleeve. Then, the rotation drive mechanism 7 drives the flip-type cooling cylinder 5 to rotate, from the state of Figure 2 to the state of Figure 1 and then to the state of

[0034] Example 2, as shown in Figures 1-2As shown in the figure, the cooling device for heat treatment of the stepped pin sleeve includes a cooling tank 1. Inside the cooling tank 1, a cooling cylinder mounting bracket 6 is installed. At the top of the cooling cylinder mounting bracket 6, a flip - type cooling cylinder 5 is rotatably installed. The flip - type cooling cylinder 5 has an open top and a cavity inside for accommodating the stepped pin sleeve. It also includes a water pump 8 for supplying coolant to the flip - type cooling cylinder 5, and a rotation drive mechanism 7 for driving the flip - type cooling cylinder 5 to rotate to change the flip angle of the flip - type cooling cylinder 5. The rotation drive mechanism 7 enables the flip - type cooling cylinder 5 to perform reciprocating swinging in the vertical plane. On one side of the flip - type cooling cylinder 5, a feeding chute 2 is provided. The flip - type cooling cylinder 5 receives the material discharged from the feeding chute 2. On the other side of the flip - type cooling cylinder 5, a discharging conveying mechanism 4 is provided. One end of the discharging conveying mechanism 4 is provided with a discharging chute 3 for receiving the material discharged from the flip - type cooling cylinder 5, and the other end of the discharging conveying mechanism 4 extends to the outside of the cooling tank 1.

[0035] Further, the cooling tank 1 includes a rectangular bottom plate, and four groups of side plates are enclosed around the rectangular bottom plate to form the cooling tank 1 for storing coolant.

[0036] Further, the feeding chute 2 includes an inclined chute body A. The chute body A is processed by angle steel and is fixed above the inside of the cooling tank 1 through a chute support frame.

[0037] Further, referring to Figure 4 , the flip - type cooling cylinder 5 includes a coaxial outer cylinder 5.1 and an inner cylinder 5.2. The inner cylinder 5.2 is located inside the outer cylinder 5.1. There is a preset water passing gap between the inner wall of the outer cylinder 5.1 and the outer wall of the inner cylinder 5.2, and there is also a preset water passing gap between the outer bottom plate 5.4 of the outer cylinder 5.1 and the inner bottom plate 5.9 of the inner cylinder 5.2. The tops of the outer cylinder 5.1 and the inner cylinder 5.2 are connected by an end - sealing ring body 5.3. The center of the inner bottom plate 5.9 is provided with a spray pipe 5.5. The bottom end of the spray pipe 5.5 is connected to the preset water passing gap. The upper end of the spray pipe 5.5 is a sealed end. Spray holes 5.10 are opened on both the pipe wall of the spray pipe 5.5 and the cylinder wall of the inner cylinder 5.2. On both sides of the outer wall of the outer cylinder 5.1, a horizontally arranged second rotating shaft 5.7 and a first rotating shaft 5.6 are symmetrically connected. The second rotating shaft 5.7 and the first rotating shaft 5.6 are respectively rotatably installed on the cooling cylinder mounting bracket 6 through corresponding bearing A and bearing seat A5.11. An axial inner channel 5.8 is opened along the length direction of the first rotating shaft 5.6 at the center of the first rotating shaft 5.6. One end of the axial inner channel 5.8 is connected to the preset water passing gap inside the outer cylinder 5.1, and the other end of the axial inner channel 5.8 is connected to the water outlet of the water pump 8.

[0038] Referring toFigure 6 The coolant provided by the water pump 8 enters the preset water passing gap between the outer cylinder 5.1 and the inner cylinder 5.2 through the inner-channel 5.8 of the shaft, and then sprays out from the water spraying holes 5.10 on the inner cylinder 5.2 and the water spraying pipe 5.5 respectively. After the stepped pin sleeve to be cooled is adjusted into the outer cylinder 5.1, the water spraying pipe 5.5 will be inserted into the stepped hole at the center of the stepped pin sleeve, so that the stepped pin sleeve will be located between the water spraying pipe 5.5 and the inner cylinder 5.2. The water spraying holes 5.10 on the water spraying pipe 5.5 and the inner cylinder 5.2 spray water to cool the inner wall and the outer wall of the stepped pin sleeve respectively, which can accurately spray water for cooling. At the same time, the coolant in the inner cylinder 5.2 can also be quickly circulated and updated under the continuous supply of the water pump 8, improving the cooling efficiency and achieving the effect of energy saving.

[0039] Furthermore, the connecting water pipe between the water pump 8 and the inner-channel 5.8 of the shaft is a rubber pipe.

[0040] Furthermore, a rotating water pipe joint 9 is installed at the end of the first rotating shaft 5.6. The rotating water pipe joint is connected to the water outlet of the water pump 8 through a connecting water pipe. The water pump 8 is located in the cooling pool 1, and the liquid level in the cooling pool 1 is higher than the water inlet of the water pump 8.

[0041] Furthermore, the cooling cylinder mounting frame 6 includes two groups symmetrically arranged, which are respectively used to support the bearing seats A5.11 on the first rotating shaft 5.6 and the second rotating shaft 5.7.

[0042] Furthermore, referring to Figure 5 The rotary driving mechanism 7 includes an upper sprocket 7.1 installed at the end of the second rotating shaft 5.7. A lower rotating shaft 7.4 is arranged below the second rotating shaft 5.7, and a lower sprocket 7.2 is installed on the lower rotating shaft 7.4. A chain 7.3 is wound between the upper sprocket 7.1 and the lower sprocket 7.2. The lower rotating shaft 7.4 is rotatably installed at the bottom of the cooling cylinder mounting frame 6 through corresponding bearings B and bearing seats B. A driving cylinder 7.5 is also hinged on the cooling cylinder mounting frame 6, and the telescopic end of the driving cylinder 7.5 is connected to one side of the chain 7.3.

[0043] By controlling the driving cylinder 7.5 to shorten, the driving cylinder 7.5 pulls one side of the chain 7.3 downward, and the other side of the chain 7.3 moves upward, causing the second rotating shaft 5.7 to rotate counterclockwise, so that the opening of the flip-type cooling cylinder 5 is switched to face the discharge chute 3; by controlling the driving cylinder 7.5 to extend, the driving cylinder 7.5 pushes one side of the chain 7.3 upward, and the other side of the chain 7.3 moves downward, causing the second rotating shaft 5.7 to rotate clockwise, so that the opening of the flip-type cooling cylinder 5 is switched to the feeding chute 2, realizing that the rotary driving mechanism 7 makes the flip-type cooling cylinder 5 perform reciprocating swinging in the vertical plane.

[0044] A proximity sensor for sensing the incoming material can be provided on one side of the feeding chute 2. The proximity sensor is electrically connected to the input end of the controller. The output end of the controller is connected to a solenoid valve that controls the expansion and contraction of the driving cylinder 7.5. The driving cylinder 7.5 is connected to the air source through the solenoid valve. The solenoid valve is a three-position four-way directional valve. The stepped pin sleeve is sleeved on the feeding chute 2 for intermittent feeding. When the proximity sensor senses the incoming material, the controller controls the driving cylinder 7.5 to extend, so that the opening of the flip-type cooling cylinder 5 is switched to the feeding chute 2 for receiving the material, and then the controller controls the driving cylinder 7.5 to shorten, and the flip-type cooling cylinder 5 discharges the material. The controller is an existing PLC controller or single-chip microcomputer.

[0045] The improvement of this specific embodiment over the prior art lies in the hardware part. At the same time, the computer program involved belongs to a simple program whose functions can be easily realized by those skilled in the art using the existing computer program development platform and well-known programming methods. In this article, the proximity sensor, solenoid valve and controller are only simple uses of their functions and do not involve improvements in method programs, etc.

[0046] Further, the discharge conveying mechanism 4 is an existing chain conveyor, driven by a built-in reduction motor. The discharge chute 3 is a chute body B that is inclined. The chute body B is processed from angle steel. The end of the chute body B is fixed to the discharge conveying mechanism 4 and / or the cooling cylinder mounting frame 6.

[0047] In Embodiment 3, the rotary drive mechanism 7 can also be a reduction motor, directly connected to the second rotating shaft 5.7 to control the rotation of the second rotating shaft 5.7.

[0048] For the cooling device for heat treatment of the stepped pin sleeve of the present utility model, the coolant in the cooling pool is continuously injected into the flip-type cooling cylinder by a water pump. The excess coolant in the flip-type cooling cylinder can overflow back into the cooling pool through the top opening of the flip-type cooling cylinder, realizing the rapid replacement of the cooling water around the stepped pin sleeve and controlling the synchronous cooling speed of the inner and outer surfaces of the stepped pin sleeve.

[0049] For the cooling device for heat treatment of the stepped pin sleeve of the present utility model, after the stepped pin sleeve to be cooled is transferred into the outer cylinder body, the spray pipe will be inserted into the stepped hole in the center of the stepped pin sleeve, so that the stepped pin sleeve will be located between the spray pipe and the inner cylinder body. The spray holes on the spray pipe and the inner cylinder body respectively spray water to cool the inner wall and the outer wall of the stepped pin sleeve. It is a way of simultaneous internal and external cooling, which can accurately spray water for cooling. At the same time, the coolant in the inner cylinder body can also be quickly circulated and updated under the continuous supply of the water pump, improving the cooling efficiency and achieving the effect of energy saving.

[0050] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and the description in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

[0051] Those details not described in the present invention are all well-known technologies to those skilled in the art.

Claims

1. A cooling device for heat treatment of a stepped pin sleeve, comprising a cooling pool, characterized in that: The cooling drum is installed in the cooling pool, and a tiltable cooling drum is rotatably installed on the top of the cooling drum mounting frame. The top of the tiltable cooling drum is open, and the interior is a cavity for accommodating the step pin sleeve. It also includes a water pump for supplying coolant to the tiltable cooling drum, and a rotation drive mechanism that drives the tiltable cooling drum to rotate to change the flipping angle of the tiltable cooling drum. The rotation drive mechanism enables the tiltable cooling drum to swing back and forth in a vertical plane. A feeding chute is provided on one side of the tiltable cooling drum, and the tiltable cooling drum receives the discharge of the feeding chute. A discharging conveying mechanism is provided on the other side of the tiltable cooling drum. A discharging conveying mechanism is provided at one end of the discharging conveying mechanism for receiving the discharge of the tiltable cooling drum, and the other end of the discharging conveying mechanism extends to the outside of the cooling pool. The tiltable cooling drum includes an outer cylinder body and an inner cylinder body that are coaxially arranged, and the inner cylinder body is in the outer cylinder body. , and a preset water-passing gap is provided between the inner wall of the outer cylinder and the outer wall of the inner cylinder, and a preset water-passing gap is also provided between the outer cylinder bottom plate of the outer cylinder and the inner cylinder bottom plate of the inner cylinder, the tops of the outer cylinder and the inner cylinder are connected by an end sealing ring, a water spray pipe is installed at the center of the inner cylinder bottom plate, the bottom end of the water spray pipe is connected with the preset water-passing gap, the upper end of the water spray pipe is a sealing end, and water spray holes are provided on the pipe wall of the water spray pipe and the cylinder wall of the inner cylinder, and the two sides of the outer wall of the outer cylinder are symmetrically connected with a horizontally arranged second rotating shaft and a first rotating shaft, the second rotating shaft and the first rotating shaft are rotatably installed on the cooling cylinder mounting frame through corresponding bearings A and bearing seats A respectively, an inner shaft channel is provided in the center of the first rotating shaft along the length direction of the first rotating shaft, one end of the inner shaft channel is connected with the preset water-passing gap in the outer cylinder, and the other end of the inner shaft channel is connected with the water outlet of the water pump.

2. The cooling device for heat treatment of the stepped pin sleeve according to claim 1, wherein The cooling pool comprises a rectangular bottom plate, and four groups of side plates are surrounded by the rectangular bottom plate to form a cooling pool for storing coolant.

3. The heat treatment cooling device for the stepped pin sleeve according to claim 2, characterized in that, The feed slide comprises an inclined slide body A, the slide body A is made of angle steel, and the slide body A is fixed to the inner upper part of the cooling pool through a slide support frame.

4. The heat treatment cooling device for the stepped pin sleeve according to claim 3, characterized in that, The connecting water pipe between the water pump and the inner channel of the shaft is a rubber pipe.

5. The heat treatment cooling device for the stepped pin sleeve according to claim 4, characterized in that, A rotating water pipe joint is installed at the end of the first rotating shaft, and the rotating water pipe joint is connected to the water outlet of the water pump through a connecting water pipe. The water pump is in a cooling pool, and the liquid level in the cooling pool is higher than the water inlet of the water pump.

6. The cooling device for heat treatment of the stepped pin sleeve according to claim 5, characterized in that, The cooling cylinder mounting frame includes two groups of bearing seats A symmetrically arranged, which are respectively used to support the first rotating shaft and the second rotating shaft.

7. The cooling device for heat treatment of the stepped pin sleeve according to claim 6, characterized in that, The rotary drive mechanism includes an upper sprocket installed at the end of a second rotating shaft, a lower rotating shaft is arranged below the second rotating shaft, a lower sprocket is installed on the lower rotating shaft, a chain is arranged between the upper sprocket and the lower sprocket, and the lower rotating shaft is rotatably installed at the bottom of the cooling cylinder mounting frame through corresponding bearings B and bearing seats B. A driving cylinder is also hinged on the cooling cylinder mounting frame, and the telescopic end of the driving cylinder is connected to one side of the chain.

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