Precise die-casting die for efficient heat dissipation type gearbox shell

Abstract

An efficient heat dissipation type precise die-casting die for a gearbox shell comprises a base arranged at the bottom, a rack arranged at the top end of the base, a lower die cavity formed in the middle of the top end of the base, an upper die block installed in the middle of the rack, a hydraulic cylinder installed at the top end of the upper die block, a guide column, a heating wire and a heat dissipation mechanism. A heat dissipation mechanism is mounted on the outer side of the lower die cavity; the heat dissipation mechanism comprises an annular cylinder, a return pump, a return pipe and a second control valve, the annular cylinder is installed on the outer side of the lower die cavity, one side of the top end of the annular cylinder is connected with a liquid conveying pipe, a first control valve is installed on the liquid conveying pipe, and a liquid conveying pump is installed at the position, close to the other end, of the liquid conveying pipe; according to the cooling device, the structure is novel, the conception is ingenious, the lower die cavity can be cooled conveniently, meanwhile, cooling liquid after use can be cooled conveniently, the cooling liquid can be recycled conveniently, and use is facilitated.

Description

Technical Field

[0001] The utility model relates to a die-casting mold, in particular to a precision die-casting mold for a high-efficiency heat-dissipating gearbox housing. Background Art

[0002] A gearbox is a device for changing the speed ratio and the direction of motion, which is used in automobiles, tractors, ships, machine tools and various machines to change the torque, speed and direction of motion transmitted from the driving shaft to the driven shaft under different working conditions. When manufacturing a gearbox housing, die-casting technology is required.

[0003] Gearbox die-casting is carried out by closing two groups of modules, so that an oil cavity for forming an oil groove of the gearbox housing is formed in the die-casting mold. Then, the die-casting mold is preheated by electric induction heating. After the preheating is completed, the die-casting material is poured into the die-casting mold until the material fills the oil cavity. After filling, pressure is applied. After the pressure application is completed, the module is opened and the housing is taken out after waiting for a certain period of time.

[0004] At present, in the prior art, after the precision die-casting mold for the gearbox housing is used, the heat dissipation efficiency of the die-cast gearbox housing is low, which is not conducive to the forming and taking out of the gearbox housing and is not conducive to production. Summary of the Utility Model

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a precision die-casting mold for a high-efficiency heat-dissipating gearbox housing, which effectively solves the problems in the prior art that after the precision die-casting mold for the gearbox housing is used, the heat dissipation efficiency of the die-cast gearbox housing is low, which is not conducive to the forming and taking out of the gearbox housing and is not conducive to production.

[0006] To achieve the above object, the utility model provides the following technical solutions: The utility model includes a base arranged at the bottom, a frame arranged at the top of the base, a lower die cavity arranged in the middle of the top of the base, an upper module installed in the middle of the frame, and a hydraulic cylinder installed at the top of the upper module. It also includes a guide post, a heating wire and a heat dissipation mechanism. The heat dissipation mechanism is installed outside the lower die cavity.

[0007] The heat dissipation mechanism includes an annular cylinder, an infusion pipe, a first control valve, an infusion pump, a coolant tank, a return liquid tank, a heat dissipation fan, a return pipe, a return pump, a return flow pipe and a second control valve. The annular cylinder is installed outside the lower die cavity. One side of the top of the annular cylinder is connected with the infusion pipe. The first control valve is installed on the infusion pipe. The infusion pump is installed near the other end of the infusion pipe. One end of the infusion pipe is connected with the coolant tank fixed on one side of the base. The return liquid tank is fixed on the other side of the base. One side of the bottom of the return liquid tank is provided with the return pipe. The return pump is installed on the return pipe. One side of the bottom of the annular cylinder is connected with the return flow pipe. The second control valve is installed on the return flow pipe.

[0008] Preferably, guide columns are installed on both sides of the top of the upper module, and guide holes are provided at the positions of the frame corresponding to the guide columns.

[0009] Preferably, heating wires are installed around the outside of the lower mold cavity.

[0010] Preferably, a heat dissipation fan is installed on one side of the reflux liquid tank.

[0011] Preferably, the other end of the return pipe is connected to the coolant tank.

[0012] Preferably, the other end of the reflux pipe is connected to the reflux liquid tank.

[0013] Beneficial effects: When the present utility model is in use, the lower mold cavity is preheated by the installed heating wires. After preheating, the heating wires stop working. The material to be die-cast is added into the lower mold cavity, and die-casting is performed through the hydraulic cylinder and the upper module. After die-casting is completed, the first control valve is opened, and the infusion pump works. The infusion pump conveys the coolant in the coolant tank to the inside of the annular cylinder through the infusion pipe, so as to dissipate heat from the lower mold cavity through the coolant. After heat dissipation is completed, the second control valve is opened, and the used coolant flows back into the reflux liquid tank through the reflux pipe. At the same time, the installed heat dissipation fan dissipates heat from the reflux liquid tank and the used coolant inside it. The return pump works, and the return pump conveys the cooled coolant back to the coolant tank through the return pipe, which is convenient for cooling the lower mold cavity, has high cooling efficiency, and is beneficial for use.

[0014] The structure of the present utility model is novel and ingeniously conceived, which is convenient for cooling the lower mold cavity. At the same time, it is convenient for dissipating heat from the used coolant, convenient for recycling and using the coolant, and beneficial for use. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the partial internal structural schematic diagram of the present utility model;

[0018] Figure 3 is the top view of the annular cylinder of the present utility model;

[0019] Reference numerals in the figure: 1, base; 2, frame; 3, lower mold cavity; 4, upper module; 5, hydraulic cylinder; 6, guide post; 7, heating wire; 8, heat dissipation mechanism; 9, annular cylinder; 10, infusion pipe; 11, first control valve; 12, infusion pump; 13, coolant tank; 14, return liquid tank; 15, cooling fan; 16, return pipe; 17, return pump; 18, return flow pipe; 19, second control valve. Specific embodiments

[0020] The following will further describe in detail the specific embodiments of the present invention in conjunction with the appended Figures 1 - 3 drawings.

[0021] Embodiment 1 is given by Figures 1 - 3 The present invention provides a precision die-casting mold for a high-efficiency heat-dissipating transmission housing, including a base 1 provided at the bottom, a frame 2 provided at the top of the base 1, a lower mold cavity 3 provided in the middle of the top of the base 1, an upper module 4 installed in the middle of the frame 2, and a hydraulic cylinder 5 installed at the top of the upper module 4. It also includes a guide post 6, a heating wire 7, and a heat dissipation mechanism 8. A heat dissipation mechanism 8 is installed outside the lower mold cavity 3;

[0022] The heat dissipation mechanism 8 includes an annular cylinder 9, an infusion pipe 10, a first control valve 11, an infusion pump 12, a coolant tank 13, a return liquid tank 14, a cooling fan 15, a return pipe 16, a return pump 17, a return flow pipe 18, and a second control valve 19. The annular cylinder 9 is installed outside the lower mold cavity 3. One side of the top of the annular cylinder 9 is connected to an infusion pipe 10. A first control valve 11 is installed on the infusion pipe 10. An infusion pump 12 is installed near the other end of the infusion pipe 10. One end of the infusion pipe 10 is connected to a coolant tank 13 fixed on one side of the base 1. The return liquid tank 14 is fixed on the other side of the base 1. One side of the bottom of the return liquid tank 14 is provided with a return pipe 16. A return pump 17 is installed on the return pipe 16. One side of the bottom of the annular cylinder 9 is connected to a return flow pipe 18. A second control valve 19 is installed on the return flow pipe 18.

[0023] Embodiment 2

[0024] In Embodiment 1, the lifting stability of the upper module 4 is insufficient. Referring to Figure 1 , as another preferred embodiment, the difference from Embodiment 1 is that guide posts 6 are installed on both sides of the top of the upper module 4, and guide holes are provided at the positions of the frame 2 corresponding to the guide posts 6 to improve the lifting stability of the upper module 4.

[0025] Embodiment 3

[0026] In Embodiment 1, it is inconvenient to preheat the lower mold cavity 3. Referring to Figure 1 , as another preferred embodiment, the difference from Embodiment 1 is that a heating wire 7 is installed around the outside of the lower mold cavity 3 to facilitate preheating of the lower mold cavity 3.

[0027] Example 4

[0028] In Example 1, the heat dissipation efficiency of the return liquid tank 14 is insufficient. Referring to Figure 1 , as another preferred embodiment, the difference from Example 1 is that a cooling fan 15 is installed on one side of the return liquid tank 14 to ensure the heat dissipation efficiency of the return liquid tank 14.

[0029] Example 5

[0030] In Example 1, the return pipe 16 is inconvenient to use. Referring to Figure 1 , as another preferred embodiment, the difference from Example 1 is that the other end of the return pipe 16 is connected to the coolant tank 13, which is convenient for the connection and use of the return pipe 16.

[0031] Example 6

[0032] In Example 1, the return pipe 18 is inconvenient to use. Referring to Figure 1 , as another preferred embodiment, the difference from Example 1 is that the other end of the return pipe 18 is connected to the return liquid tank 14, which is convenient for the connection and use of the return pipe 18.

[0033] During specific use: When the present utility model is used, the lower mold cavity 3 is preheated by the installed heating wire 7. After preheating, the heating wire 7 stops working. The material to be die-cast is added into the lower mold cavity 3, and die-casting is performed through the hydraulic cylinder 5 and the upper die block 4. After die-casting is completed, the first control valve 11 is opened, and the infusion pump 12 works. The infusion pump 12 transports the coolant in the coolant tank 13 to the inside of the annular cylinder 9 through the infusion pipe 10, so as to dissipate heat from the lower mold cavity 3 through the coolant. After heat dissipation is completed, the second control valve 19 is opened, and the used coolant flows back into the return liquid tank 14 through the return pipe 18. At the same time, the installed cooling fan 15 dissipates heat from the return liquid tank 14 and the used coolant inside it. The return pump 17 works, and the return pump 17 transports the cooled coolant back to the coolant tank 13 through the return pipe 16, which is convenient for cooling the lower mold cavity 3. The cooling efficiency is high and it is beneficial for use.

[0034] Advantageous effects: The structure of the present utility model is novel and ingeniously conceived. It is convenient to cool the lower mold cavity 3. At the same time, it is convenient to dissipate heat from the used coolant, convenient for the recycling use of the coolant, and beneficial for use.

[0035] Through those skilled in the art, all the electrical components in this case are connected to their adapted power supplies through wires, and appropriate controllers and encoders should be selected according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of the electrical components working successively in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of the electrical control will be made.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precision die-casting mold for a high-efficiency heat-dissipating gearbox housing, comprising a base (1) provided at the bottom, a frame (2) provided at the top of the base (1), a lower mold cavity (3) provided in the middle of the top of the base (1), an upper module (4) installed in the middle of the frame (2), and a hydraulic cylinder (5) installed at the top of the upper module (4), characterized in that: It further includes guide posts (6), heating wires (7) and a heat dissipation mechanism (8), and the heat dissipation mechanism (8) is installed outside the lower die cavity (3); The heat dissipation mechanism (8) includes an annular cylinder (9), a liquid infusion pipe (10), a first control valve (11), a liquid infusion pump (12), a coolant tank (13), a return liquid tank (14), a heat dissipation fan (15), a return pipe (16), a return pump (17), a return flow pipe (18) and a second control valve (19). The annular cylinder (9) is installed outside the lower die cavity (3). One side of the top of the annular cylinder (9) is connected to the liquid infusion pipe (10). The first control valve (11) is installed on the liquid infusion pipe (10). The liquid infusion pump (12) is installed near the other end of the liquid infusion pipe (10). One end of the liquid infusion pipe (10) is connected to the coolant tank (13) fixed on one side of the base (1). The return liquid tank (14) is fixed on the other side of the base (1). One side of the bottom of the return liquid tank (14) is provided with the return pipe (16). The return pump (17) is installed on the return pipe (16). One side of the bottom of the annular cylinder (9) is connected to the return flow pipe (18). The second control valve (19) is installed on the return flow pipe (18).

2. The precision die-casting mold for an efficient heat dissipation type gearbox housing according to claim 1, characterized in that: Guide posts (6) are installed on both sides of the top of the upper module (4), and guide holes are provided at positions corresponding to the guide posts (6) on the frame (2).

3. The precision die-casting mold for an efficient heat dissipation type transmission housing according to claim 1, wherein: Heating wires (7) are installed around the outside of the lower die cavity (3).

4. An efficient heat dissipation type gearbox housing precision die-casting mold according to claim 1, characterized in that: A heat dissipation fan (15) is installed on one side of the return liquid tank (14).

5. The precision die-casting mold for a high-efficiency heat-dissipating gearbox housing according to claim 1, wherein: The other end of the return pipe (16) is connected to the coolant tank (13).

6. The precision die-casting mold for an efficient heat-dissipating gearbox housing according to claim 1, characterized in that: The other end of the return flow pipe (18) is connected to the return liquid tank (14).

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