Vacuum pump with high vacuum degree and high heat dissipation

Abstract

The vacuum pump with the high vacuum degree and the high heat dissipation performance comprises a driving motor and a pump body, the driving motor comprises a motor shaft, the pump body comprises an air cylinder, a piston and a piston rod, the piston rod is connected with the motor shaft, the air cylinder comprises an air inlet side air cylinder and an air outlet side air cylinder, and an air inlet position and an air outlet position are formed in the air cylinder. The piston comprises a piston end and a middle connecting end internally provided with a mounting cavity, an air cylinder sealing piece is arranged in a limiting part of the piston end, and the air cylinder sealing piece performs reverse axial displacement action along with the movement direction of the piston, so that the compression ratio of a vacuumized object can be doubled through secondary extrusion, more gas is pumped out, and the vacuum degree of the vacuumized object is improved. The air outlet position comprises the inner air outlet hole and the inner conduction position, extracted air can be led out through the installation cavity, heat in the air cylinder or the position of the piston can be brought out together, heat dissipation can be conducted on the vacuum pump, and the influence of thermal expansion and cold contraction on use of the piston is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a vacuum pump with high vacuum degree and high heat dissipation. Background Art

[0002] Most of the vacuum pumps and air pumps currently used or available on the market for the vacuum industry are of single-piston type. Among them, the single-piston air pump can generally meet the use requirements during the inflation stage because there is enough gas in the outside world. However, when the vacuum pump is used, it is a process of exhausting air, that is, to extract the gas in a space, so that the vacuumed space is in a vacuum state for a certain period of time, thereby extending the shelf life and inhibiting the growth of bacteria.

[0003] When an existing vacuum pump performs vacuuming work in a certain space, the area of ​​the vacuum chamber in the space will become smaller and smaller, that is, not much gas is pumped out each time. At the same time, due to its single-piston structure, the existing vacuum pump assumes that there is a 5-liter cavity in the vacuum chamber, and during the vacuuming operation, only 1 liter of gas is pumped out, and after the gas is pumped out, it may not be possible to completely press the gas out. As a result, when the vacuum pump is in the vacuuming operation in a certain space and is in the final stage, a part of the gas cannot be pumped out at all, thereby affecting the vacuuming operation of the existing vacuum pump in a certain space, and also affecting the shelf life of the items in the above-mentioned space where the vacuuming is performed, so that they cannot be stored for a longer period of time. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the utility model provides a vacuum pump which can improve the vacuum degree of the space to be evacuated so that it can be preserved for a longer period of time and the items in the space can be kept for a longer period of time, and at the same time can dissipate heat from the piston during the evacuation process.

[0005] In order to achieve the above purpose, the utility model adopts a vacuum pump with high vacuum and high heat dissipation, including a driving motor and a pump body, the driving motor including a motor shaft, the pump body including a cylinder, a piston placed in the cylinder, and a piston rod driving the piston to reciprocate in the cylinder, the other end of the piston rod relative to driving the piston to move is connected to the motor shaft, forming a piston driven by the driving motor to move, the cylinder including an inlet and an outlet side cylinder, the piston is driven by the driving motor to move back and forth between the inlet and outlet side cylinders;

[0006] The cylinder is provided with an inlet position distributed on the inlet side cylinder and an outlet position distributed on the outlet side cylinder. The piston includes a piston end for gas extrusion and an intermediate connecting end for connecting the piston end and the piston rod. The interior of the intermediate connecting end forms a mounting cavity for connecting the piston rod and the piston end. A limiting portion is provided on the circumferential surface of the piston end. A cylinder seal is provided in the limiting portion. The cylinder seal performs an axial displacement action in the opposite direction with the movement direction of the piston. The limiting portion is formed with an inlet cylinder inlet area facing the inlet side cylinder and an outlet cylinder inlet area facing the outlet side cylinder.

[0007] The air outlet position includes an internal air outlet hole opened toward the inner direction of the piston end of the piston, and an internal conducting position for conducting the internal air outlet hole with the mounting cavity. The gas entering the air inlet cylinder through the air inlet position enters the air outlet cylinder through the piston squeeze, and enters the mounting cavity through the internal air outlet hole and the internal conducting position in turn, forming gas discharged to the outside, and the gas discharged to the outside through the mounting cavity performs heat dissipation for the piston.

[0008] The beneficial effect of the above structure is that: by involving the cylinder part in the air inlet side and the air outlet side cylinder, and setting an air inlet position on the air inlet side cylinder, and setting an air outlet position on the air outlet side cylinder, the gas entering the vacuum pump during the air extraction stage can be reliably entered and exited. At the same time, by involving the piston part in the piston rod and the piston, and arranging the drive of the piston to be driven by the driving motor to drive the piston rod, a synchronous piston is arranged in the cylinder, so that during the air extraction stage, the gas can be squeezed and discharged through the air outlet position through the up and down movement of the piston. In addition, in order to ensure that more gas is extracted, the utility model adopts A limiting portion is provided on the circumferential surface of the piston end used for gas extrusion on the piston, that is, on the contact surface of the inner wall of the cylinder, and an intake cylinder intake area is provided on the side of the limiting portion facing the intake cylinder, and an outlet cylinder intake area is provided on the side of the limiting portion facing the outlet cylinder. At the same time, a cylinder seal is provided on the limiting portion, which can realize axial movement as the gas enters and exits between the intake cylinder and the outlet cylinder, that is, when the gas enters the intake cylinder, the cylinder seal moves toward the outlet cylinder to seal and close the outlet cylinder intake area, and moves toward the intake cylinder to seal and close the intake cylinder intake area.

[0009] When the air inlet is pushed down and the air is pushed out of the air pump, the air inlet pressure is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air inlet pressure in the air outlet cylinder is increased, and the air in The gas in the air outlet cylinder has entered the air outlet side cylinder. Therefore, when the driving motor continues to operate, the piston can be lifted and moved toward the side of the air outlet side cylinder. Since the piston moves toward the air outlet position, that is, there is always gas in the air outlet side cylinder during its air outlet stage, so that the cylinder seal always contacts the side wall of the air inlet side cylinder on the limiting part, thereby realizing the gas in the air outlet side cylinder. When the piston moves toward the direction of the air outlet side cylinder, the gas in the vacuum pump can be squeezed for the second time. That is, compared with the traditional vacuum pump, which only performs a single squeezing method when used, the vacuum pump involved in the utility model can discharge more gas to the outside, thereby improving the vacuum degree inside the vacuumized object, that is, through the secondary squeezing, the compression ratio is doubled, and the objects that require freshness or vacuum packaging inside the object can be stored for a longer time and are less likely to deteriorate.

[0010] In addition, the utility model relates to the piston end and the middle connecting end through the piston part, and the middle connecting end is provided with an installation cavity, that is, between the piston rod and the piston, and the piston rod is extended into the installation cavity to realize the connection between the piston rod and the piston. At the same time, the utility model relates to the outlet position for gas outlet on the cylinder, including an inner air outlet hole opened in the direction of the inner piston end of the piston, and an inner conducting position for conducting the inner air outlet hole with the installation cavity, so that the gas after secondary extrusion can enter the installation cavity through the inner air outlet hole and the inner conducting position. Since the installation cavity is designed to be a cavity punched into the middle connecting end, that is, after passing through the inner conducting position, the gas can be discharged to the outside through the cavity mouth of the installation cavity. Simultaneously, since the installation cavity is a cavity punched into the middle connecting end, that is, when the gas is discharged from the bottom or side of the cavity, the discharge process can bring out the heat in the cylinder or the piston position, thereby realizing that the vacuum pump can extract the gas from a certain space and dissipate heat for the vacuum pump itself, thereby reducing the influence of thermal expansion and contraction, and the piston is used.

[0011] The utility model is further configured such that a one-way air intake mechanism is respectively provided between the air intake position and the air intake side cylinder, and between the air outlet position and the air outlet side cylinder, and the one-way air intake mechanism is used to prevent the gas entering the air intake position and the air outlet position from retreating.

[0012] Through the above-mentioned arrangement, the gas entering into the air intake side cylinder will not retreat from the air intake side cylinder to the vacuumed object, and the gas discharged through the air outlet will not return to the vacuum pump, thereby ensuring the reliable execution of the gas extrusion stage and the reliability of the use of the vacuum pump.

[0013] The utility model is further configured that the one-way air intake mechanism includes an intake cylinder one-way air intake mechanism and an outlet cylinder one-way air intake mechanism, the intake cylinder one-way air intake mechanism includes an intake one-way air intake valve distributed between the intake position and the intake side cylinder, and an intake cylinder giving way portion used to give way to the intake one-way air intake valve during the intake stage, the intake cylinder giving way portion is arranged on the intake side cylinder, extends outside the pump body relative to the side of the intake position away from the intake side cylinder, and is used to connect with the vacuum space outside;

[0014] The one-way air intake mechanism of the air outlet cylinder is an air outlet one-way vent valve distributed between the inner air outlet hole and the inner conducting position. One side of the air outlet one-way vent valve is limited between the inner air outlet hole and the inner conducting position, and the other side of the air outlet one-way vent valve is a structure that can move toward the side of the inner conducting position, and the air outlet one-way vent valve can only be opened toward one side of the inner conducting position.

[0015] Through the above-mentioned arrangement, the one-way air intake mechanism of the air intake cylinder or the one-way air intake mechanism of the air outlet cylinder in the one-way air intake mechanism can further realize that the one-way air intake mechanism of the air intake cylinder will only open in the direction of the air intake side cylinder, and the one-way air intake mechanism of the air outlet cylinder will only open in the direction of the inner air outlet hole, and there will be no reverse opening situation, thereby further ensuring the reliability of the use of the vacuum pump.

[0016] The utility model is further configured that the number of pump bodies is two, the two pump bodies are distributed on both sides of the driving motor, the motor shaft extends out from both side ends of the driving motor respectively, and eccentric wheels are arranged on both side ends of the driving motor, one end of the eccentric wheel is connected to the end of the driving motor, and the other end is connected to the piston rod of the pump body;

[0017] The two eccentric wheels and the two piston rods of the pump bodies are staggered. Through the staggered arrangement, the two piston rods are distributed in the pump body in an up-and-down manner, and the pistons in the two pump bodies are driven to move in an up-and-down manner.

[0018] Through the above, the number of pump bodies in the vacuum pump is set to two, that is, the number of pistons, cylinders and piston rods are two sets, and the two pump bodies are driven by the shaft ends of two motor shafts extending from the two ends of the driving motor, and synchronously by arranging an eccentric wheel on each of the two shaft ends, and the installation angle of the eccentric wheel is staggered, that is, after installation, the piston in the pump body moves, when one of them is in an upward state, the other is in a downward state, and when the driving motor drives the piston in one of the pump bodies to move upward, the other can be moved downward synchronously, and vice versa, thereby making it possible for the driving motor to realize that only the power to drive one pump body is needed to drive the two pump bodies, thereby making it possible for a 36W driving motor to drive the piston of the vacuum pump to move, for example, now only an 18W driving motor is needed, which also makes the use of the vacuum pump more energy-saving, more economical and safer.

[0019] The utility model is further configured that the vacuum pump also includes two connecting frames, which are respectively arranged at the two side ends of the driving motor and connected, and the two connecting frames form matching through cavities for connecting the two side ends of the driving motor and the eccentric wheel, and for the end of the piston rod away from the piston to perform connection transmission, and the two side ends of the driving motor are respectively connected to the matching through cavities of the two connecting frames at their cavity opening positions;

[0020] The motor shafts located at the two side ends of the driving motor extend into the matching cavity through the cavity opening of the matching cavity. The outer ends of the cylinders of the two pump bodies are connected to the outer side walls of the matching cavities of the two connecting frames, and the outer side walls are provided with a rod end output position for the end of the piston rod away from the piston to extend into.

[0021] Through the above arrangement, the driving motor and the two pump bodies can be reliably connected, and the piston rod in the pump body and the motor shaft at the two side ends of the driving motor can be synchronously passed through and extended into the connecting frame to connect with the eccentric wheel, thereby ensuring that the vacuum pump is not affected by the use of the connecting frame. The two pump bodies involved are designed to be directly mounted on the connecting frame without the aid of an additional shell, that is, the outside of the cylinder can be directly in contact with the outside world, thereby further ensuring the reliability of the heat dissipation of the pump body. At the same time, due to the cooperation between the cylinder and the connecting frame, there is no need for an additional shell, so that the cylinder can be made larger, that is, the traditional one is generally 50, and the cylinder involved in the utility model can be made up to 72. In addition, since the vacuum pump involved in the utility model does not require an additional shell, the overall volume of the vacuum pump produced is smaller, that is, when used in a vacuum machine or other equipment, the required occupied space is also smaller.

[0022] The utility model is further configured such that a plurality of ventilation grooves are formed on the side wall of the matching through cavity, and auxiliary heat dissipation for the vacuum pump is formed through the plurality of ventilation grooves, and sound insulation cotton that is in contact with the inner cavity wall of the matching through cavity is provided on the inner cavity wall of the matching through cavity.

[0023] Through the above arrangement, it is possible to achieve auxiliary heat dissipation for the vacuum pump while reducing the power output of the vacuum pump, the exhaust of the extracted gas and the progress of the exhaust process, and meet the vacuum pump requirement of less than 70 decibels.

[0024] The utility model is further configured such that the vacuum pump also includes a mounting plate for installing the vacuum pump, and two pump bodies, two connecting frames and a driving motor are distributed above the mounting plate, and are connected to the mounting plate through the two connecting frames on the side relatively away from the pump body, forming mounting limits for the two pump bodies, the two connecting frames and the driving motor on the mounting plate, and forming the two pump bodies to be reversely installed on the vacuum pump, and forming lubricating oil for lubricating the cylinder, which can flow to the matching position between the piston rod, the eccentric wheel and the motor shaft at the two side ends of the driving motor along with the reciprocating movement of the piston in the cylinder, and perform self-lubrication of the vacuum pump.

[0025] Through the above arrangement, since the general movement of the cylinder and the piston is usually pulled from bottom to top, the vacuum pump is pulled from top to bottom, that is, the pump body is reversed, so that the lubricating oil used in the cylinder and between the piston can flow with the movement of the piston to the matching position between the piston rod and the eccentric wheel and the motor shaft at both side ends of the driving motor, thereby realizing self-lubrication during mechanical rotation, and eliminating the need to add lubricating oil from time to time at the above matching position when the pump body is installed normally, thereby making the use process of the vacuum pump involved in the utility model more convenient.

[0026] The utility model is further configured such that the connected piston end and the middle connecting end have a stepped distribution in a convex shape on the outside, the limiting portion is an annular limiting groove opened on the piston end, and the air intake position is an air intake nozzle.

[0027] By connecting the piston end and the middle connecting end, and distributing the outer parts of the two in a convex-shaped stepped manner, the structure of the middle connecting end is partially retracted toward the position of the central axis. At the same time, since the piston and the cylinder are adapted structures, that is, the structure of the cylinder part, in order to ensure the reliability of use, the cylinder is generally provided with an internal extension at the position of the middle connecting end. At the same time, the piston involved in the utility model is less affected by the atmosphere when the piston moves up and down due to the structural setting of the middle connecting end, because only part of the middle connecting end is exposed to the outside, compared with the traditional piston surface that is affected by the atmosphere, the piston involved in the utility model is less affected by the atmosphere when it moves up and down, which can achieve the required pulling force for the piston to move smaller, and further achieve the required power of the driving motor when the driving motor drives the piston to move smaller; and the limiting groove is set as an annular limiting groove opened on the piston end, thereby compared with other styles of grooves, the use of an annular groove can make the cylinder seal, its setting and limiting more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a first-view stereoscopic schematic diagram of a vacuum pump according to a specific embodiment of the utility model;

[0029] Figure 2 It is a second perspective perspective schematic diagram of a vacuum pump according to a specific embodiment of the utility model;

[0030] Figure 3 It is a perspective schematic diagram of a vacuum pump according to a specific embodiment of the utility model from a third viewing angle;

[0031] Figure 4 It is a schematic front view of a vacuum pump according to a specific embodiment of the utility model;

[0032] Figure 5 yes Figure 4 A schematic cross-sectional view of AA;

[0033] Figure 6 yes Figure 5 An enlarged schematic diagram of

[0034] Figure 7 It is a top view schematic diagram of a vacuum pump of a specific embodiment of the utility model;

[0035] Figure 8 yes Figure 4 A schematic cross-sectional view of BB;

[0036] Fig. 9 yes Figure 8 An enlarged schematic diagram of . DETAILED DESCRIPTION

[0037] like Figure 1-9As shown, the specific embodiment of the utility model is a vacuum pump with high vacuum and high heat dissipation, including a driving motor 2 and a pump body 4. The driving motor 2 includes a motor shaft 21. The pump body 4 includes a cylinder 44, a piston 43 placed in the cylinder 44, and a piston rod 42 that drives the piston 43 to move back and forth in the cylinder 44. The other end of the piston rod 42 relative to the piston 43 is connected to the motor shaft 21, so that the piston 43 is driven to move by the driving motor 2. The cylinder 44 includes an inlet and an outlet side cylinder. The piston 43 is driven by the driving motor 2 to move back and forth between the inlet and outlet side cylinders.

[0038] The cylinder 44 is provided with an inlet position 41 distributed on the inlet side cylinder 442 and an outlet position distributed on the outlet side cylinder 441. The piston 43 includes a piston end 431 for gas extrusion and an intermediate connecting end 432 for connecting the piston end 431 and the piston rod 42. The interior of the intermediate connecting end 432 forms a mounting cavity a for connecting the piston rod 42 and the piston end 431. A limiting portion 4311 is provided on the circumferential surface of the piston end 431. A cylinder seal 6 is provided in the limiting portion 4311. The cylinder seal 6 performs an axial displacement in the opposite direction with the movement direction of the piston 43. The limiting portion 4311 is formed with an inlet cylinder inlet area 4312 facing the inlet side cylinder 442 and an outlet cylinder inlet area 48 facing the outlet side cylinder 441.

[0039] The air outlet position includes an internal air outlet hole 46 opened toward the inner direction of the piston end 431 of the piston 43, and an internal conducting position 47 for conducting the internal air outlet hole 46 with the installation cavity a. The gas entering the air inlet cylinder 44 through the air inlet position 41 is squeezed into the air outlet cylinder 44 by the piston 43, and enters the installation cavity a through the internal air outlet hole 46 and the internal conducting position 47 in turn, forming gas discharged to the outside, and the gas discharged to the outside through the installation cavity a performs heat dissipation for the piston 43.

[0040] By involving the cylinder 44 part in the air inlet side and the air outlet side cylinder 441, and setting the air inlet position 41 on the air inlet side cylinder 442, and setting the air outlet position on the air outlet side cylinder 441, the gas entering the vacuum pump during the air extraction stage can be reliably entered and exited. At the same time, by involving the piston 43 part in the piston rod 42 and the piston 43, and setting the drive of the piston 43 to be driven by the driving motor 2 to drive the piston rod 42, the synchronous piston 43 is set in the cylinder 44, so that during the air extraction stage, the gas can be squeezed and discharged through the air outlet position through the up and down movement of the piston 43. In addition, in order to ensure that more gas is extracted, the utility model adopts a piston end 431 on the piston 43 for gas squeezing A limiting portion 4311 is provided on the circumferential surface, that is, on the contact surface of the inner wall of the cylinder 44, and an intake cylinder intake area 4312 is provided on the side of the limiting portion 4311 facing the intake side cylinder 442, and an outlet cylinder intake area 48 is provided on the side facing the outlet side cylinder 441, and at the same time, a cylinder seal 6 is provided on the limiting portion 4311, which can realize axial movement as the gas enters and exits between the intake side cylinder 442 and the outlet side cylinder 441, that is, when the gas enters the intake side cylinder 442, the cylinder seal 6 moves toward the outlet side cylinder 441 to block and close the outlet cylinder intake area 48, and moves toward the intake side cylinder 442 to block and close the intake cylinder intake area 4312;

[0041] As a result, when the vacuum pump is performing a vacuum operation, the air inlet cylinder 442 is inhaled through the air inlet position 41, and the cylinder seal 6 can move axially toward the air outlet cylinder 441 with the gas pressure, and abut against the side wall of the limiting portion 4311 toward the air outlet cylinder 441, thereby forming a blockage of the air inlet area 48 of the air outlet cylinder. After the vacuum pump has extracted a certain amount of gas, the piston 43 is driven by the driving motor 2 to move toward the air inlet cylinder 442, and the squeezed gas enters the air inlet area 4312 of the air inlet cylinder. The piston 43 moves toward the inlet cylinder 442 side through the gas pressure of the outlet cylinder 441, and contacts the side wall of the limiting portion 4311 toward the inlet cylinder 442 side, thereby forming a blockage for the inlet cylinder 4312 ... When the vacuum pump squeezes the gas once, the gas has entered the outlet cylinder 441 at this time. Therefore, when the drive motor 2 continues to operate, the piston 43 can be lifted and moved toward the outlet cylinder 441. Since the piston 43 moves toward the outlet position, that is, there is always gas in the outlet cylinder 441 during its outlet stage, the cylinder seal 6 always contacts the side wall of the limiting portion 4311 toward the inlet cylinder 442, thereby achieving the gas in the outlet cylinder 441 during the activity. When the plug 43 moves toward the direction of the air cylinder 441 on the air outlet side, the gas in the vacuum pump can be squeezed twice. That is, compared with the traditional vacuum pump, which only performs a single squeeze, the vacuum pump involved in the utility model can discharge more gas to the outside, thereby improving the vacuum degree inside the vacuumed object. That is, through the secondary squeeze, the compression ratio is doubled, and the items that require freshness or vacuum packaging inside the object can be stored for a longer time and are less likely to deteriorate.

[0042] In addition, the utility model connects the piston 43 partly to the piston end 431 and the middle connecting end 432, and opens a mounting cavity a on the middle connecting end 432, that is, between the piston rod 42 and the piston 43, and the piston rod 42 extends into the mounting cavity a, so as to realize the connection between the piston rod 42 and the piston 43. At the same time, the utility model connects the piston rod 42 and the piston 43 by providing the outlet position for gas outlet on the cylinder 44, including the inner gas outlet hole 46 opened in the direction of the inner piston end 431 of the piston 43, and the inner conducting position 47 for conducting the inner gas outlet hole 46 with the mounting cavity a, so that the gas after the secondary extrusion can pass through the inner gas outlet hole 46, the inner conducting position 47, and the inner gas outlet hole 46. 47 enters the position of the installation chamber a. Since the installation chamber a is designed to be a chamber that is punched into the interior of the middle connecting end 432, that is, after passing through the internal conduction position 47, the gas can be discharged to the outside through the cavity mouth of the installation chamber a. Simultaneously, since the installation chamber a is a chamber that is punched into the interior of the middle connecting end 432, that is, when the gas is discharged from the bottom or side of the cavity, the heat in the cylinder 44 or the position of the piston 43 can be brought out during the discharge process, thereby achieving that the vacuum pump can extract the gas from a certain space while also dissipating the heat for the vacuum pump itself, thereby reducing the influence of thermal expansion and contraction, and the use of the piston 43 occurs.

[0043] like Figure 4-6 As shown in FIGS. 8 and 9 , one-way air intake mechanisms are respectively provided between the air intake position 41 and the air intake side cylinder 442, and between the air outlet position and the air outlet side cylinder 441. Through the one-way air intake mechanisms, the gas entering the air intake position 41 and the air outlet position is prevented from retreating;

[0044] The one-way air intake mechanism includes an air intake cylinder one-way air intake mechanism and an air outlet cylinder one-way air intake mechanism. The air intake cylinder one-way air intake mechanism includes an air intake one-way vent valve distributed between the air intake position 41 and the air intake side cylinder 442, and an air intake cylinder 44 concede portion used to concede and open the air intake one-way vent valve during the air intake stage. The air intake cylinder 44 concede portion is provided on the air intake side cylinder 442, extends outside the pump body 4 on the air intake position 41 relative to a side away from the air intake side cylinder 442, and is used to connect with the vacuum space outside.

[0045] The one-way air intake mechanism of the air outlet cylinder is an air outlet one-way vent valve distributed between the inner air outlet hole 46 and the inner conducting position 47, one side of the air outlet one-way vent valve is limited between the inner air outlet hole 46 and the inner conducting position 47, and the other side of the air outlet one-way vent valve is a structure that can move toward the side of the inner conducting position 47, and the air outlet one-way vent valve can only be opened toward one side of the inner conducting position 47.

[0046] like Figure 1-4As shown in FIG. 8 , the number of the pump bodies 4 is two, and the two pump bodies 4 are distributed on both sides of the driving motor 2. The motor shaft 21 extends out from both side ends of the driving motor 2, and eccentric wheels 5 are arranged on both side ends of the driving motor 2. One end of the eccentric wheel 5 is connected to the end of the driving motor 2, and the other end is connected to the piston rod 42 of the pump body 4.

[0047] The two eccentric wheels 5 and the piston rods 42 of the two pump bodies 4 are staggered. Through the staggered arrangement, the two piston rods 42 are arranged in the pump body 4 in an up-and-down manner, and the pistons 43 in the two pump bodies 4 are driven to move in an up-and-down manner.

[0048] like Figure 1-4 As shown in FIG. 8 , the vacuum pump further comprises two connecting frames 3, which are respectively arranged at the two side ends of the driving motor 2 and connected, and the two connecting frames 3 form matching through cavities 31 for connecting the two side ends of the driving motor 2 with the eccentric wheel 5 and the end of the piston rod 42 away from the piston 43 to perform connection transmission, and the two side ends of the driving motor 2 are respectively connected to the matching through cavities 31 of the two connecting frames 3 at their cavity opening positions;

[0049] The motor shaft 21 located at the two side ends of the driving motor 2 extends into the matching through cavity 31 through the cavity opening of the matching through cavity 31. The outer ends of the cylinders 44 of the two pump bodies 4 are connected to the outer side walls of the matching through cavity 31 of the two connecting frames 3, and the outer side walls are provided with a rod end output position b for the end of the piston rod 42 away from the piston 43 to extend into.

[0050] like Figure 1-4 As shown in FIG. 8 , a plurality of ventilation grooves 32 are formed on the side wall of the above-mentioned matching through cavity 31, and auxiliary heat dissipation for the vacuum pump is formed through the plurality of ventilation grooves 32, and sound insulation cotton that is attached to the inner cavity wall of the matching through cavity 31 is provided on the inner cavity wall of the matching through cavity 31.

[0051] like Figure 1-5 As shown in Figure 8, the vacuum pump further comprises a mounting plate 1 for installing the vacuum pump, two pump bodies 4, two connecting frames 3 and a driving motor 2 are distributed above the mounting plate 1, and are connected to the mounting plate 1 via the two connecting frames 3 on the side away from the pump bodies 4, thereby forming mounting limits for the two pump bodies 4, the two connecting frames 3 and the driving motor 2 on the mounting plate 1, and forming the two pump bodies 4 to be reversely mounted on the vacuum pump, and forming lubricating oil for lubricating the cylinder 44, which can flow to the matching position between the piston rod 42, the eccentric wheel 5 and the motor shaft 21 at both side ends of the driving motor 2 along with the reciprocating movement of the piston 43 in the cylinder 44, and perform self-lubrication of the vacuum pump.

[0052] The piston end 431 and the middle connecting end 432 are connected to each other, and the outside of the two is distributed in a convex-shaped stepped manner. The limiting portion 4311 is an annular limiting groove opened on the piston end 431, and the air inlet position 41 is an air inlet nozzle.

Claims

1. A vacuum pump with high vacuum and high heat dissipation, comprising a drive motor and a pump body, wherein the drive motor comprises a motor shaft, the pump body comprises a cylinder, a piston disposed in the cylinder, and a piston rod driving the piston to reciprocate in the cylinder, the other end of the piston rod relative to the piston being driven to move is connected to the motor shaft, so that the piston is driven to move by the drive motor, characterized in that: The cylinder includes an inlet and an outlet cylinder, and the piston is driven by a driving motor to move back and forth between the inlet and outlet cylinders; The cylinder is provided with an inlet position distributed on the inlet side cylinder and an outlet position distributed on the outlet side cylinder. The piston includes a piston end for gas extrusion and an intermediate connecting end for connecting the piston end and the piston rod. The interior of the intermediate connecting end forms a mounting cavity for connecting the piston rod and the piston end. A limiting portion is provided on the circumferential surface of the piston end. A cylinder seal is provided in the limiting portion. The cylinder seal performs an axial displacement action in the opposite direction with the movement direction of the piston. The limiting portion is formed with an inlet cylinder inlet area facing the inlet side cylinder and an outlet cylinder inlet area facing the outlet side cylinder. The air outlet position includes an internal air outlet hole opened toward the inner direction of the piston end of the piston, and an internal conducting position for conducting the internal air outlet hole with the mounting cavity. The gas entering the air inlet cylinder through the air inlet position enters the air outlet cylinder through the piston squeeze, and enters the mounting cavity through the internal air outlet hole and the internal conducting position in turn, forming gas discharged to the outside, and the gas discharged to the outside through the mounting cavity performs heat dissipation for the piston.

2. The vacuum pump with high vacuum and high heat dissipation according to claim 1, characterized in that: One-way air intake mechanisms are respectively arranged between the air intake position and the air intake side cylinder, and between the air outlet position and the air outlet side cylinder. The one-way air intake mechanisms prevent the gas entering the air intake position and the air outlet position from retreating.

3. The vacuum pump with high vacuum and high heat dissipation according to claim 2, characterized in that: The one-way air intake mechanism includes an intake cylinder one-way air intake mechanism and an outlet cylinder one-way air intake mechanism, the intake cylinder one-way air intake mechanism includes an intake one-way air intake valve distributed between the intake position and the intake side cylinder, and an intake cylinder yielding portion used to yield and open the intake one-way air intake valve during the intake stage, the intake cylinder yielding portion is arranged on the intake side cylinder, extends outside the pump body relative to the side of the intake position away from the intake side cylinder, and is used to connect with the vacuum space outside; The one-way air intake mechanism of the air outlet cylinder is an air outlet one-way vent valve distributed between the inner air outlet hole and the inner conducting position. One side of the air outlet one-way vent valve is limited between the inner air outlet hole and the inner conducting position, and the other side of the air outlet one-way vent valve is a structure that can move toward the side of the inner conducting position, and the air outlet one-way vent valve can only be opened toward one side of the inner conducting position.

4. The vacuum pump with high vacuum and high heat dissipation according to claim 1, 2 or 3, characterized in that: The number of the pump bodies is two, and the two pump bodies are distributed on both sides of the driving motor. The motor shaft extends out from both side ends of the driving motor respectively, and eccentric wheels are arranged on both side ends of the driving motor. One end of the eccentric wheel is connected to the end of the driving motor, and the other end is connected to the piston rod of the pump body. The two eccentric wheels and the two piston rods of the pump bodies are staggered. Through the staggered arrangement, the two piston rods are distributed in the pump body in an up-and-down manner, and the pistons in the two pump bodies are driven to move in an up-and-down manner.

5. The vacuum pump with high vacuum and high heat dissipation according to claim 4, characterized in that: The vacuum pump further comprises two connecting frames, which are respectively arranged at the two side ends of the driving motor and connected, and the two connecting frames form matching through cavities for connecting the two side ends of the driving motor and the eccentric wheel, and for the end of the piston rod away from the piston to perform connection transmission, and the two side ends of the driving motor are respectively connected to the matching through cavities of the two connecting frames at their cavity opening positions; The motor shafts located at the two side ends of the driving motor extend into the matching cavity through the cavity opening of the matching cavity. The outer ends of the cylinders of the two pump bodies are connected to the outer side walls of the matching cavities of the two connecting frames, and the outer side walls are provided with a rod end output position for the end of the piston rod away from the piston to extend into.

6. The vacuum pump with high vacuum and high heat dissipation according to claim 5, characterized in that: A plurality of ventilation grooves are formed on the side wall of the matching through cavity, and auxiliary heat dissipation for the vacuum pump is formed through the plurality of ventilation grooves, and sound insulation cotton is arranged on the inner cavity wall of the matching through cavity and is attached to the inner cavity wall of the matching through cavity.

7. The vacuum pump with high vacuum and high heat dissipation according to claim 5 or 6, characterized in that: The vacuum pump also includes a mounting plate for installing the vacuum pump. Two pump bodies, two connecting frames and a drive motor are distributed above the mounting plate and are connected to the mounting plate through the two connecting frames on the side away from the pump bodies, forming mounting limits for the two pump bodies, the two connecting frames and the drive motor on the mounting plate, and forming the two pump bodies to be reversely installed on the vacuum pump, and forming lubricating oil for lubricating the cylinder, which can flow to the matching positions between the piston rod, the eccentric wheel and the motor shaft at the two side ends of the drive motor along with the reciprocating movement of the piston in the cylinder, and perform self-lubrication of the vacuum pump.

8. The vacuum pump with high vacuum and high heat dissipation according to claim 3, characterized in that: The connected piston end and the middle connecting end have a stepped distribution in a convex shape on the outside, the limiting part is an annular limiting groove opened on the piston end, and the air intake position is an air intake nozzle.

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