Air pump

Abstract

The invention relates to the technical field of air pumps, in particular to an air pump. Comprising a protective shell, a sliding part and a driving assembly, and at least one side of the protective shell is provided with an air cavity; the sliding piece is arranged in the protective shell, at least one end of the sliding piece is connected with a piston assembly, the piston assembly is in sliding connection with the air cavity so as to compress air in the air cavity, and the two opposite sides of the sliding piece are each provided with a first gear tooth part; the driving assembly comprises a rotary driving part, a first driving gear and two second driving gears, the first driving gear is in driving connection with the rotary driving part and located in the protective shell, the first driving gear is in transmission connection with the two second driving gears, and the two second driving gears are located on the two opposite sides of the sliding part and rotationally connected with the protective shell; wherein the second driving gear comprises a fan-shaped gear tooth part, and the fan-shaped gear tooth part is meshed with the first gear tooth part. The problems that in the prior art, an air pump drives a piston assembly in a swing motion mode, and consequently efficiency is low and energy consumption is high are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air pumps, in particular to an air pump. BACKGROUND

[0002] In the industrial and mechanical fields, air pumps, as a common gas transmission equipment, are widely used in various occasions, such as air compressors, vacuum pumps, liquid delivery, etc. The air pump compresses the gas and delivers it to the required position, playing the role of providing power or delivering medium.

[0003] With the development of industrial automation and intelligence, higher requirements are put forward for the performance, efficiency, volume and maintenance convenience of air pumps. The existing traditional air pump usually uses a swing transmission structure to drive the piston to move and compress the gas in the air cavity. The air pump with such structure swings when driving the piston assembly to move, which has low working efficiency and high energy consumption. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide an air pump to solve the problem that the air pump in the prior art drives the piston assembly by swing movement, resulting in low efficiency and high energy consumption.

[0005] The present application discloses an air pump, comprising a protective shell, a sliding member and a driving assembly, at least one side of the protective shell is provided with an air cavity; the sliding member is arranged in the protective shell, at least one end of the sliding member is connected with a piston assembly, and the piston assembly is in sliding connection with the air cavity to compress the gas in the air cavity, and opposite sides of the sliding member are respectively provided with first gear teeth; the driving assembly comprises a rotating driving member arranged on one side of the protective shell, a first driving gear and two second driving gears, the first driving gear is in driving connection with the rotating driving member and is located in the protective shell, the first driving gear is in transmission connection with the two second driving gears respectively, and the two second driving gears are located on opposite sides of the sliding member and are in rotational connection with the protective shell; wherein the second driving gear comprises a fan-shaped gear tooth part, the fan-shaped gear tooth part is in meshing connection with the first gear teeth to drive one of the second driving gears to move the sliding member to the left and the other second driving gear to move the sliding member to the right.

[0006] Optionally, the second driving gear comprises a rotating shaft and a second gear tooth part arranged on the rotating shaft, the fan-shaped gear tooth part and the second gear tooth part are coaxially arranged, the second gear tooth part is in transmission connection with the first driving gear, and the fan-shaped gear tooth part is in meshing connection with the first gear teeth.

[0007] Optionally, the sliding member is a connecting rod, and the first gear teeth are arranged on opposite sides of the connecting rod, and one side of the first gear teeth is arranged in a staggered manner with the other side of the first gear teeth.

[0008] Optionally, the piston assembly comprises a piston head and a sealing ring, the piston head is located in the air cavity, the two ends of the connecting rod are connected with the piston head respectively, the piston head is provided with an annular accommodating groove, the sealing ring is arranged in the accommodating groove, the piston head is further provided with an air inlet, and the end of the piston head away from the connecting rod is provided with a first valve plate corresponding to the air inlet.

[0009] Optionally, the air cavity comprises a cavity body and an end cover connected with each other, one end of the cavity body is connected with the protective shell, the other end is connected with the end cover, the end cover is provided with an air outlet, the piston head is located in the cavity body, and a one-way valve is arranged between the end cover and the cavity body.

[0010] Optionally, the one-way valve comprises a valve seat and a second valve plate, the valve seat is provided with an opening, the cavity body and the end cover are arranged on the opposite sides of the valve seat respectively, the second valve plate is arranged on the side of the valve seat facing the end cover, one end of the second valve plate is fixed on the valve seat, and the other end covers the opening.

[0011] Optionally, the piston assembly comprises a piston rod and a piston head connected with each other, the air cavity is provided with a through hole on the side facing the protective shell, one end of the piston rod is connected with the sliding piece, and the other end of the piston rod extends into the air cavity through the through hole, so that the piston head is slidably connected with the air cavity.

[0012] Optionally, the protective shell is provided with a receiving seat, and the air cavity is arranged on the receiving seat, and the air cavity is fixedly connected with the protective shell through the receiving seat.

[0013] Optionally, the second drive gear comprises a rotating shaft and a second gear tooth part arranged at one end of the rotating shaft, the fan-shaped gear tooth part is located at the outer circle of the rotating shaft, the second gear tooth part is in transmission connection with the first drive gear, and the fan-shaped gear tooth part is in meshing connection with the first gear tooth part.

[0014] Optionally, the sliding piece comprises a connecting block and a limiting ring arranged at least one end of the connecting block, one end of the piston rod is fixedly connected with the limiting ring, and the first gear tooth part is arranged on the opposite sides of the connecting block.

[0015] Optionally, when one end of the sliding piece is connected with the piston assembly, the rotary driving piece is located on the side of the protective shell away from the air cavity.

[0016] Optionally, the first drive gear is a conical gear, the driving assembly further comprises a first transmission gear and a second transmission gear, the first transmission gear is provided with a third gear tooth part and a fourth gear tooth part in layers, the third gear tooth part is in meshing connection with the first drive gear, the fourth gear tooth part is in meshing connection with the second transmission gear, and the two second drive gears are in meshing connection with the second transmission gear respectively.

[0017] Optionally, the protective shell is further provided with a fixing rod, the sliding piece is provided with a sliding sleeve on the side facing the fixing rod, the sliding sleeve is in sliding connection with the fixing rod, and the sliding piece is in sliding connection with the fixing rod through the sliding sleeve.

[0018] Optionally, when the two ends of the sliding member are connected with the piston assembly respectively, the air cavity is located at the opposite sides of the protection shell respectively, and the rotary driving member is located at the side of the protection shell adjacent to one of the air cavities.

[0019] Optionally, the driving assembly further comprises coaxially arranged first and second linkage gears, the first linkage gear is located in the protection shell, the first linkage gear is in meshing connection with the first driving gear, and the two second driving gears are in meshing connection with the second linkage gear respectively.

[0020] Compared with the prior art, the air pump provided by the embodiment of the present application has the beneficial effects that: the rotary driving member is arranged at one side of the protection shell, one end of the rotary driving member is connected with the first driving gear, and the first driving gear is arranged in the protection shell. The sliding member is further arranged in the protection shell, the opposite sides of the sliding member are provided with the first gear teeth, and the second driving gear in meshing connection with the first gear teeth is arranged, and the first driving gear is in meshing connection with the two second driving gears respectively. Therefore, the power of the rotary driving member can be transmitted to the second driving gear through the first driving gear, and finally applied to the sliding member through the second driving gear, so as to realize the movement of the sliding member. The two second driving gears are driven by the same first driving gear, so when the first driving gear rotates clockwise, the two second driving gears rotate counterclockwise. Because the two second driving gears are located at the opposite sides of the connecting member, and the second driving gear is provided with the sector gear teeth, during the actual working process, when one of the second driving gears drives the sliding member to move to the left, the sector gear teeth of the second driving gear will be rotated one by one to completely disengage from the meshing with the sliding member due to the driving of the first driving gear. At this time, the sector gear teeth of the other second driving gear begin to mesh with the first gear teeth of the sliding member one by one, and drive the sliding member to move to the right. The above-mentioned arrangement realizes the reciprocating movement of the sliding member in the protection shell, so as to drive the piston assembly connected to the sliding member to move reciprocatingly, and compress the gas in the air cavity arranged at least one side of the protection shell, so as to realize the ability of the air pump to pressurize and deliver the gas outward. The air pump with such structure can drive the piston assembly to move reciprocatingly in the straight line direction, so that the movement direction of the sliding member is consistent with the movement direction of the piston assembly, thereby improving the efficiency of the driving assembly and reducing the energy consumption of the air pump when compressing the gas. BRIEF DESCRIPTION OF DRAWINGS

[0021] The technical solutions of the present application will be further described in detail below with reference to the drawings and embodiments, and the drawings are as follows: Figure 1 is a schematic view of the air pump provided by the embodiment of the present application; Figure 2 is a schematic view of the second driving bearing provided by the embodiment of the present application; Figure 3 is a schematic view of a sliding member provided by an embodiment of the present application; Figure 4 is a schematic view of a first linkage gear and a second linkage gear provided by an embodiment of the present application; Figure 5 is a schematic view of a fixed rod and a sliding sleeve provided by an embodiment of the present application; Figure 6 is a schematic view of a top of a protective shell provided by an embodiment of the present application; Figure 7 is a schematic view of a first transmission gear and a second transmission gear provided by an embodiment of the present application; Figure 8 is a schematic view of a sliding member, a piston assembly and a driving assembly provided by an embodiment of the present application; Figure 9 is a schematic view of a sliding member provided by an embodiment of the present application; Figure 10 is a schematic view of a gas cavity and a one-way valve provided by an embodiment of the present application.

[0022] The various reference signs in the drawings are as follows: 1000, air pump; 100, protective shell; 101, receiving seat; 102, fixed rod; 103, fixed column; 200, gas cavity; 201, via hole; 202, cavity; 203, one-way valve; 2031, valve seat; 2032, opening; 2033, second valve plate; 204, end cover; 2041, air outlet; 300, sliding member; 301, first gear portion; 302, limiting ring; 303, sliding sleeve; 304, connecting rod; 305, connecting block; 400, piston assembly; 401, piston rod; 402, piston head; 4021, accommodating groove; 4022, air inlet; 4023, first valve plate; 403, sealing ring; 500, driving assembly; 501, first driving gear; 502, second driving gear; 5021, rotating shaft; 5023, second gear portion; 5024, sector gear portion; 503, first linkage gear; 504, second linkage gear; 505, rotary driving member; 601, first transmission gear; 6011, third gear portion; 6012, fourth gear portion; 602, second transmission gear. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Now, the preferred embodiments of the present application will be described in detail with reference to the drawings.

[0024] An air pump 1000 is provided by an embodiment of the present application, as shown in Figures 1-3As shown, the air pump 1000 comprises a protective shell 100, a sliding piece 300 and a driving assembly 500, at least one side of the protective shell 100 is provided with an air cavity 200; the sliding piece 300 is arranged in the protective shell 100, at least one end of the sliding piece 300 is connected with a piston assembly 400, and the piston assembly 400 is in sliding connection with the air cavity 200 to compress the gas in the air cavity 200, and opposite sides of the sliding piece 300 are respectively provided with first gear teeth 301; the driving assembly 500 comprises a rotating driving piece 505 arranged on one side of the protective shell 100, a first driving gear 501 and two second driving gears 502, the first driving gear 501 is in driving connection with the rotating driving piece 505 and is located in the protective shell 100, the first driving gear 501 is in transmission connection with the two second driving gears 502 respectively, the two second driving gears 502 are located on opposite sides of the sliding piece 300 respectively and are in rotational connection with the protective shell 100; wherein the second driving gear 502 comprises a sector gear tooth part 5024, the sector gear tooth part 5024 is in meshing with the first gear teeth 301 to drive one of the second driving gears 502 to drive the sliding piece 300 to move left and the other second driving gear 502 to drive the sliding piece 300 to move right.

[0025] A rotating driving member 505 is arranged on one side of the protection shell 100, one end of the rotating driving member 505 is drivingly connected with a first driving gear 501, and the first driving gear 501 is arranged in the protection shell 100. A sliding member 300 is also arranged in the protection shell 100, opposite sides of the sliding member 300 are respectively provided with a first gear portion 301, and a second driving gear 502 engaged with the first gear portion 301 is arranged, and the first driving gear 501 is engaged with the two second driving gears 502 respectively, so that the power of the rotating driving member 505 can be transmitted to the second driving gear 502 through the first driving gear 501, and finally applied to the sliding member 300 through the second driving gear 502, realizing the movement of the sliding member 300. Among them, the two second driving gears 502 are driven by the same first driving gear 501, so when the first driving gear 501 rotates clockwise, the two second driving gears 502 rotate counterclockwise. Because the two second driving gears 502 are located on opposite sides of the connecting member, and the second driving gear 502 is provided with a sector gear portion 5024, during the actual working process, during the process in which one of the second driving gears 502 drives the sliding member 300 to move to the left, the sector gear portion 5024 of the second driving gear 502 will rotate one by one to completely disengage from the engagement with the sliding member 300 due to the driving of the first driving gear 501, at this time, the sector gear portion 5024 of the second driving gear 502 on the other side begins to engage with the first gear portion 301 of the sliding member 300 one by one, and drives the sliding member 300 to start moving to the right. The above arrangement realizes the reciprocating movement of the sliding member 300 in the protection shell 100, so as to drive the piston assembly 400 connected to the sliding member 300 to move reciprocally, and compress the gas in the gas cavity 200 arranged on at least one side of the protection shell 100, thereby realizing the ability of the air pump 1000 to pressurize and deliver gas outward. The air pump 1000 with such structure can drive the piston assembly 400 to move reciprocally in a straight line, so that the movement direction of the sliding member 300 is consistent with the movement direction of the piston assembly 400, thereby improving the efficiency of the driving assembly 500 and reducing the energy consumption of the air pump 1000 when compressing gas.

[0026] Specifically, through the design of the piston assembly 400, effective compression of gas is realized, and the ability of the air pump 1000 to deliver gas is realized. The engagement between the driving assembly 500 drives the piston assembly 400 to move, which can realize a stable transmission mechanism and ensure the stability and uniformity of the air pump 1000 to deliver gas outward.

[0027] It should be noted that the two second driving gears 502 are respectively located on the opposite sides of the sliding piece 300, and the sliding piece 300 can move in two directions through the design of the sector gear part 5024, so that the air cavity 200 can be arranged on at least one side of the protective shell 100 to deliver air flow outward, thereby increasing the functionality and applicability of the air pump 1000.

[0028] Reference Figure 2 The second driving gear 502 comprises a rotating shaft 5021, and a second gear part 5023 arranged on the rotating shaft 5021. The sector gear part 5024 is coaxially arranged with the second gear part 5023. The second gear part 5023 is in transmission connection with the first driving gear 501, and the sector gear part 5024 is in meshing connection with the first gear part 301.

[0029] The second driving gear 502 comprises a rotating shaft 5021, and a second gear part 5023 arranged on the rotating shaft 5021. The sector gear part 5024 is coaxially arranged with the second gear part 5023. The second gear part 5023 is in transmission connection with the first driving gear 501, and the sector gear part 5024 is in meshing connection with the first gear part 301.

[0030] The second gear part 5023 on the second driving gear 502 is in meshing connection with the first driving gear 501 to drive the entire second driving gear 502 to rotate. The sector gear part 5024 on the second driving gear 502 is in meshing connection with the first gear part 301 of the sliding piece 300 to drive the sliding piece 300 to move. Such a design helps to improve the reliability of the driving assembly 500. By reasonably arranging the arrangement positions of the second gear part 5023 and the sector gear part 5024, the risk of failure due to transmission failure can be reduced, and the reliability and stability of the air pump 1000 can be improved.

[0031] It should be noted that in the present embodiment, the radius of the sector gear part 5024 is smaller than the radius of the second gear part 5023.

[0032] Reference Figure 8 and Figure 9 The sliding piece 300 is a connecting rod 304, and the first gear part 301 is arranged on the opposite sides of the connecting rod 304. One side of the first gear part 301 is arranged in a staggered manner with the other side of the first gear part 301.

[0033] Because the two second driving gears 502 are connected with the first driving gear 501 and are arranged on opposite sides of the first driving gear 501, one of the second driving gears 502 rotates clockwise and the other second driving gear 502 rotates counterclockwise, so that when the sliding member 300 is driven to move by one of the second driving gears 502, the sliding member 300 can be driven to move to the left, and when the sliding member 300 moves to the limit position, the second driving gear 502 is disengaged from the connecting rod 304, and the second driving gear 502 is engaged with the first gear 301 on the connecting rod 304, thereby driving the sliding member 300 to move to the right, so as to realize the linear reciprocating motion of the sliding member 300.

[0034] Because the first gear 301 is arranged on opposite sides of the connecting rod 304, the second driving gears 502 on opposite sides of the connecting rod 304 will not interfere with each other when the connecting rod 304 moves to the limit position, that is, when one of the second driving gears 502 drives the sliding member 300 to move to the limit position, the second driving gear 502 is disengaged from the sliding member 300, and the other second driving gear 502 is just engaged with the sliding member 300 to drive the sliding member 300 to move in the opposite direction.

[0035] Specifically, the first gear 301 is arranged directly on opposite sides of the connecting rod 304, so that the first gear 301 can directly drive the connecting rod 304 to move linearly and reciprocally, ensuring that the piston assembly 400 arranged at the end of the sliding member 300 can move in a linear direction, and improving the movement efficiency of the piston assembly 400.

[0036] Reference Figure 8 The piston assembly 400 includes a piston head 402 and a sealing ring 403, the piston head 402 is located in the air cavity 200, the two ends of the connecting rod 304 are connected with the piston head 402, the piston head 402 is provided with an annular accommodating groove 4021, the sealing ring 403 is arranged in the accommodating groove 4021, the piston head 402 is further provided with an air inlet 4022, and the end of the piston head 402 away from the connecting rod 304 is provided with a first valve plate 4023 corresponding to the air inlet 4022, one end of the first valve plate 4023 is fixedly connected with the piston head 402, and the other end covers the air inlet 4022.

[0037] The piston head 402 is arranged at opposite ends of the connecting rod 304, so that the connecting rod 304 can drive the two piston heads 402 to move reciprocally in the air cavity 200, so that the air pump 1000 has higher efficiency in compressing air. At the same time, the two piston heads 402 connected by the connecting rod 304 are coaxially arranged and can move along the same straight line.

[0038] On the other hand, the piston head 402 is provided with an air inlet 4022, and the end of the piston head 402 away from the connecting rod 304 is provided with a first valve plate 4023 for controlling the flow direction of the air flow. In actual use, when the connecting rod 304 pushes the piston head 402 to move towards the air cavity 200, the side of the piston head 402 towards the air cavity 200 has a larger pressure due to the compressed air, so that the compressed air in the air cavity 200 presses the first valve plate 4023 tightly on the air inlet 4022, so that the air in the air cavity 200 cannot flow out through the air inlet 4022. When the connecting rod 304 drives the piston head 402 to move towards the side away from the air cavity 200, the side of the piston head 402 towards the air cavity 200 has a smaller pressure, so that the first valve plate 4023 can be pushed by the external air pressure and opened towards the side of the air cavity 200, so that the external air can enter the air cavity 200 through the air inlet 4022.

[0039] Specifically, the sealing ring 403 is arranged in the annular accommodation groove 4021 on the piston head 402, which can provide better sealing performance between the piston assembly 400 and the air cavity 200, prevent gas leakage, and ensure that the gas in the air cavity 200 is effectively compressed and processed.

[0040] Reference Figure 10 The air cavity 200 includes a cavity 202 and an end cover 204 connected to each other, one end of the cavity 202 is connected to the protective shell 100, the other end is connected to the end cover 204, the end cover 204 is provided with an air outlet 2041, the piston head 402 is located in the cavity 202, and a one-way valve 203 is arranged between the end cover 204 and the cavity 202.

[0041] The cavity 202 is used to accommodate the piston head 402 to move for a long stroke to better compress the gas in the air cavity 200. The end cover 204 is arranged on the side of the cavity 202 away from the protective shell 100, and the end cover 204 is provided with an air outlet 2041 for transmitting compressed gas to the outside. A one-way valve 203 is arranged between the cavity 202 and the end cover 204, which realizes the one-way flow of the gas in the air cavity 200, so that the compressed gas in the air cavity 200 can flow to the end cover 204 through the one-way valve 203 and flow out through the air outlet 2041, and at the same time, the external air can be prevented from entering the cavity 202, so as to ensure that the gas can only flow in a predetermined direction, prevent backflow or leakage of the gas, and improve the efficiency of the air pump 1000.

[0042] In this embodiment, the gas can only flow from the cavity 202 to the end cover 204 and be discharged through the air outlet 2041, and cannot flow in reverse. Thus, the safe operation of the air pump 1000 is ensured.

[0043] Reference Figure 10The one-way valve 203 comprises a valve seat 2031 and a second valve plate 2033. The valve seat 2031 is provided with an opening 2032. The cavity 202 and the end cover 204 are respectively arranged on opposite sides of the valve seat 2031. The second valve plate 2033 is arranged on the side of the valve seat 2031 facing the end cover 204. One end of the second valve plate 2033 is fixed on the valve seat 2031, and the other end covers the opening 2032.

[0044] The opposite sides of the valve seat 2031 are connected with the cavity 202 and the end cover 204 respectively. The opening 2032 is arranged on the valve seat 2031. The second valve plate 2033 is arranged on the side of the valve seat 2031 facing the end cover 204. The compressed gas flow can be pushed away from the side facing the end cover 204 by the pressure of the compressed gas flow, so that the compressed gas flow can enter the end cover 204 from the cavity 202 and be discharged through the gas outlet 2041, and cannot flow in reverse. When the gas wants to enter the cavity 202 from the side of the end cover 204 through the one-way valve 203, the compressed gas in the cavity 202 exerts pressure on the second valve plate 2033, so that the gas cannot pass through the opening 2032, thereby preventing the air from flowing into the cavity 202 in reverse.

[0045] Specifically, one end of the second valve plate 2033 is fixed on the valve seat 2031, so that the second valve plate 2033 can be stably arranged on the valve seat 2031 and avoid missing and falling off. The other end of the second valve plate 2033 covers the opening 2032, which can provide good sealing performance for the one-way valve 203.

[0046] Reference Figure 1 The piston assembly 400 comprises a piston rod 401 and a piston head connected with each other. The gas cavity 200 is provided with a through hole 201 on the side facing the protection shell 100. One end of the piston rod 401 is connected with the sliding piece 300, and the other end extends into the gas cavity 200 through the through hole 201, so as to be slidably connected with the gas cavity 200 through the piston head.

[0047] The piston assembly 400 comprises the piston rod 401 and the piston head, so that the piston assembly 400 can stably slide in the gas cavity 200 and effectively compress the gas. The piston rod 401 is connected with the piston head in the gas cavity 200 through the through hole 201. The piston can generate high pressure when compressing the gas, so as to effectively compress the gas and discharge the compressed gas through the gas outlet, thereby realizing the function of stably and uniformly delivering the gas by the air pump 1000.

[0048] The gas cavity 200 is provided with a gas outlet, so that the compressed gas can be smoothly released. The arrangement of the gas outlet ensures that the compressed gas can be quickly discharged, which is helpful for the continuous operation of the air pump 1000 and the recycling of the gas.

[0049] With reference to Figure 1 The protective shell 100 is provided with a receiving seat 101, and the air cavity 200 is arranged on the receiving seat 101. The air cavity 200 is fixedly connected with the protective shell 100 through the receiving seat 101.

[0050] The receiving seat 101 can provide additional support and fixing effect, which helps to enhance the structural stability of the entire air pump 1000. Through the fixed connection of the receiving seat 101 and the protective shell 100, it can ensure that the air cavity 200 maintains a stable position during operation, reduces the vibration and deformation of the air pump 1000.

[0051] The design of the receiving seat 101 helps to enhance the safety of the air pump 1000. Through the fixed connection of the receiving seat 101 and the protective shell 100, it can effectively prevent the air cavity 200 from accidentally detaching or shifting, reduce the probability of accidents, and protect the safety of the operator and the air pump 1000.

[0052] With reference to Figure 3 The sliding piece 300 includes a connecting block 305 and a limiting ring 302 arranged at least one end of the connecting block 305. One end of the piston rod 401 is fixedly connected with the limiting ring 302, and the first gear teeth part 301 is arranged on the opposite sides of the connecting block 305.

[0053] The limiting ring 302 on the sliding piece 300 is used for fixedly connecting with the piston rod 401, so as to realize the driving of the connecting block 305 to the piston rod 401. The limiting ring 302 can limit the setting position of the piston rod 401, preventing the piston rod 401 from shaking and falling off during movement. This helps to protect the normal operation of the piston assembly 400.

[0054] It is easy to think that the piston rod 401 is fixedly connected with the sliding piece 300 through the limiting ring 302, which can ensure that the connection between the piston rod 401 and the connecting block 305 is more stable and reliable. This helps to reduce the risk of failure caused by loose connection.

[0055] It should be noted that the limiting ring 302 and the connecting block 305 are integrally formed, which can improve the structural strength of the sliding piece 300 and enhance the fixing and limiting effect of the piston rod 401.

[0056] With reference to Figure 1 and Figure 5 When one end of the sliding piece 300 is connected with the piston assembly 400, the rotary driving piece 505 is located on the side of the protective shell 100 away from the air cavity 200.

[0057] When the sliding member 300 is connected with the piston assembly 400 at one end, the rotary driving member 505 is located at the side of the protective shell 100 away from the air cavity 200. On the one hand, the first driving gear 501 can be directly driven by the rotary driving member 505, so that the piston assembly 400 can obtain a larger activity space and a larger activity range, thereby better compressing the gas in the air cavity 200. On the other hand, the side of the protective shell 100 connected with the air cavity 200 and the side of the protective shell 100 connected with the rotary driving member 505 can balance the weight distribution of the air pump 1000.

[0058] Further, with reference to Figure 5 and Figure 7 When the sliding member 300 is connected with the piston assembly 400 at one end, the first driving gear 501 is a bevel gear, and the driving assembly 500 further comprises a first transmission gear 601 and a second transmission gear 602. The first transmission gear 601 is provided with a third gear portion 6011 and a fourth gear portion 6012 in layers, the third gear portion 6011 is engaged with the first driving gear 501, and the fourth gear portion 6012 is engaged with the second transmission gear 602. The two second driving gears 502 are respectively engaged with the second transmission gear 602.

[0059] In the embodiment in which the sliding member 300 is connected with the piston assembly 400 at one end, the first driving gear 501 is a bevel gear, and the driving assembly 500 further comprises a first transmission gear 601 and a second transmission gear 602. The first transmission gear 601 needs to be engaged with the first driving gear 501 in a bevel gear structure and also needs to be engaged with the second transmission gear 602, so the first transmission gear 601 is provided with the third gear portion 6011 engaged with the first driving gear 501 and the fourth gear portion 6012 used for engaging with the second transmission gear 602, so as to transmit the power of the first driving gear 501 to the second transmission gear 602. The second transmission gear 602 is engaged with the second driving gear 502, so as to finally transmit the power of the first driving gear 501 to the second driving gear 502 and drive the sliding member 300 to move. Through the structure of the first transmission gear 601, the transmission efficiency of the driving assembly 500 can be improved, the energy loss can be reduced, and the overall efficiency of the air pump 1000 can be improved.

[0060] In the above case, the first driving gear 501 is a bevel gear, which helps to improve the transmission efficiency. The design of the bevel gear can reduce the meshing loss between gears, reduce energy loss, and improve transmission efficiency. On the other hand, the bevel gear can change the direction of force transmission, so that the piston assembly 400 can be driven to move linearly and reciprocally with less energy loss.

[0061] It should be noted that in order to cooperate with the first driving gear 501 of the bevel gear structure, the third gear part 6011 on the first transmission gear 601 is also a bevel gear.

[0062] Specifically, through the design of the multi-stage transmission driving assembly 500, more precise power control can be achieved, and the movement of the piston assembly 400 is more accurate and controllable, which is suitable for application occasions that require high-precision movement.

[0063] At the same time, the first transmission gear 601 is provided with third gear part 6011 and fourth gear part 6012 for different purposes, which can help the first transmission gear 601 to reduce the size and save space.

[0064] Further, referring to Figure 5 When one end of the sliding part 300 is connected with the piston assembly 400, the protective shell 100 is also provided with a fixing rod 102, and the side of the sliding part 300 facing the fixing rod 102 is provided with a sliding sleeve 303, which is in sliding connection with the fixing rod 102. The sliding part 300 is in sliding connection with the fixing rod 102 through the sliding sleeve 303.

[0065] Because at least one side of the sliding part 300 is connected with the piston assembly 400, one side of the sliding part 300 is provided with the piston assembly 400. At this time, only one side of the piston assembly 400 of the sliding part 300 provides support effect for it. In order to avoid the instability of the sliding part 300 in the sliding process, the fixing rod 102 is arranged in the protective shell 100, and the sliding sleeve 303 for sliding connection with the fixing rod 102 is arranged on the sliding part 300. The sliding part 300 is in sliding connection with the fixing rod 102 through the sliding sleeve 303, which obtains certain support and connection stability effect. On the other hand, because the sliding sleeve 303 is in sliding connection with the fixing rod 102, it plays a certain guiding role for the sliding movement of the sliding part 300, and ensures that the sliding part 300 moves in the correct direction and angle. Therefore, the arrangement of the fixing rod 102 and the sliding sleeve 303 can reduce the swing and shake of the sliding part 300 in the movement process when the sliding part 300 is connected with only one piston assembly 400, keep the movement track of the sliding part 300 stable, and help to ensure the normal operation of the air pump 1000.

[0066] It is easy to think that through the sliding connection of the sliding sleeve 303 and the fixing rod 102, the friction between the piston rod 401 and the fixing rod 102 can be reduced. This helps to reduce the energy loss of the air pump 1000, improve the movement efficiency, and prolong the service life of the parts.

[0067] The fixed rod 102 can provide additional support and protection to prevent the sliding member 300 from being disturbed or damaged during movement. This helps to ensure the stability and safety of the air pump 1000.

[0068] It should be noted that the sliding sleeve 303 on the sliding member 300 can be provided with one or more.

[0069] Reference Figure 1 and Figure 5 When the two ends of the sliding member are connected with the piston assemblies respectively, the air chambers are located on opposite sides of the protective shell, and the rotary drive member is located on one side of the protective shell adjacent to one of the air chambers.

[0070] When the two ends of the sliding member 300 are connected with the piston rods 401 respectively, the rotary drive member 505 is located at the bottom of the protective shell 100. This structural layout can help improve the structural stability of the air pump 1000. When the opposite ends of the sliding member 300 are connected with the piston assemblies 400 respectively, and the rotary drive member 505 is provided at the bottom of the protective shell 100, it can balance the weight distribution of the air pump 1000, improving the stability of the air pump 1000.

[0071] Further, reference Figure 4 When the opposite sides of the sliding member 300 are connected with the piston assemblies 400 respectively, the drive assembly 500 further includes coaxially arranged first and second linkage gears 503 and 504. The first linkage gear 503 is located inside the protective shell 100, and the first linkage gear 503 is meshingly connected with the first drive gear 501. The two second drive gears 502 are respectively meshingly connected with the second linkage gear 504.

[0072] The air pump 1000 further includes first and second linkage gears 503 and 504, which are coaxially arranged, which means that the angles of the first and second linkage gears 503 and 504 are the same. Therefore, in actual use, the first linkage gear 503 is used to mesh with the first drive gear 501 to drive the first drive gear 501 to rotate the first linkage gear 503 and the second linkage gear 504. The second linkage gear 504 is meshed with the two second drive gears 502, so the second linkage gear 504 can drive the two second drive gears 502 to rotate at the angular velocity of the first drive gear 501, so as to ensure that the two second drive gears 502 have the same driving speed, which can stably and continuously drive the sliding member 300 to move reciprocatingly and linearly, and ultimately continuously drive the piston assemblies 400, which helps to ensure that the air pump 1000 can work efficiently.

[0073] The second linkage gear 504 is coaxially arranged with the first linkage gear 503, so the angular velocity of the second linkage gear 504 is the same as that of the first linkage gear 503, and the angular velocity is the angular velocity of the rotation of the first driving gear 501. This helps to maintain the overall balance and stability of the air pump 1000 and improve the running stability of the air pump 1000.

[0074] On the other hand, because the radii of the first linkage gear 503 and the second linkage gear 504 are not the same, the linear velocities of the first linkage gear 503 and the second linkage gear 504 are not the same. At this time, the linear velocity of the first linkage gear 503 with a larger radius is greater, and the linear velocity of the second linkage gear 504 with a smaller radius is smaller, so the force borne by the second linkage gear 504 can be reduced, and the friction and wear of the second linkage gear 504 can be reduced to some extent. At the same time, the second linkage gear 504 with a smaller linear velocity has less energy loss, thereby improving the transmission efficiency and stability of the driving assembly 500.

[0075] Reference Figure 1 and Figure 6 The protective shell 100 is provided with a fixed column 103, the rotating shaft 5021 is rotationally connected with the fixed column 103, and the second driving gear 502 is rotationally connected with the protective shell 100 through the rotating shaft 5021.

[0076] The rotating shaft 5021 is rotationally connected with the top of the protective shell 100 through the fixed column 103, and this connection mode helps to enhance the structural stability of the air pump. The fixed column 103 can support the rotating shaft 5021, reduce the vibration and deformation of the air pump, and improve the overall stability of the air pump.

[0077] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; all these modifications and replacements shall belong to the protection scope of the appended claims of the present application.

Claims

1. An air pump, characterized in that, include: A protective shell, wherein at least one side of the protective shell is provided with an air cavity; A sliding member is disposed within the protective shell. At least one end of the sliding member is connected to a piston assembly, and the piston assembly is slidably connected to the air chamber to compress the gas in the air chamber. First gear teeth are respectively provided on opposite sides of the sliding member. The drive assembly includes a rotary drive member disposed on one side of the protective shell, a first drive gear, and two second drive gears. The first drive gear is drivenly connected to the rotary drive member and is located inside the protective shell. The first drive gear is transmittedly connected to the two second drive gears respectively. The two second drive gears are located on opposite sides of the sliding member and are rotatably connected to the protective shell. The second drive gear includes a sector tooth portion, which meshes with the first tooth portion, so that one of the second drive gears drives the slider to move to the left, and the other second drive gear drives the slider to move to the right.

2. The air pump according to claim 1, characterized in that, The second drive gear includes a rotating shaft and a second gear tooth portion disposed on the rotating shaft. The sector-shaped gear tooth portion is coaxially disposed with the second gear tooth portion. The second gear tooth portion is drivenly connected to the first drive gear, and the sector-shaped gear tooth portion is meshed with the first gear tooth portion.

3. The air pump according to claim 2, characterized in that, The sliding member is a connecting rod, and the first gear teeth are located on opposite sides of the connecting rod, with the first gear teeth on one side being misaligned with the first gear teeth on the other side; the piston assembly includes a piston head and a sealing ring, the piston head is located in the air chamber, the two ends of the connecting rod are respectively connected to the piston head, the piston head is provided with an annular receiving groove, the sealing ring is located in the receiving groove, the piston head is also provided with an air inlet, and the end of the piston head opposite to the connecting rod is provided with a first valve plate corresponding to the air inlet, one end of the first valve plate is fixedly connected to the piston head, and the other end covers the air inlet.

4. The air pump according to claim 3, characterized in that, The air chamber includes an interconnected cavity and an end cap. One end of the cavity is connected to the protective shell, and the other end is connected to the end cap. The end cap is provided with an air outlet. The piston head is located in the cavity. A one-way valve is provided between the end cap and the cavity. The one-way valve includes a valve seat and a second valve plate. The valve seat has an opening. The cavity and the end cap are respectively located on opposite sides of the valve seat. The second valve plate is located on the side of the valve seat facing the end cap. One end of the second valve plate is fixed to the valve seat, and the other end covers the opening. The opening can communicate with the air outlet.

5. The air pump according to claim 2, characterized in that, The piston assembly includes a piston rod and a piston head connected to each other. The air chamber has a through hole on the side facing the protective shell. One end of the piston rod is connected to the sliding member, and the other end extends through the through hole into the air chamber to be slidably connected to the air chamber via the piston head. The sliding member includes a connecting block and a limiting ring disposed at at least one end of the connecting block. One end of the piston rod is fixedly connected to the limiting ring, and the first gear teeth are disposed on opposite sides of the connecting block.

6. The air pump according to claim 2, characterized in that, The protective shell is provided with a receiving seat, and the air cavity is disposed on the receiving seat. The air cavity is fixedly connected to the protective shell through the receiving seat.

7. The air pump according to claim 5 or 6, characterized in that, When one end of the slider is connected to the piston assembly, the rotary drive is located on the side of the protective shell away from the air chamber.

8. The air pump according to claim 7, characterized in that, The first drive gear is a bevel gear. The drive assembly also includes a first transmission gear and a second transmission gear. The first transmission gear has a third gear tooth section and a fourth gear tooth section in layers. The third gear tooth section meshes with the first drive gear, and the fourth gear tooth section meshes with the second transmission gear. The two second drive gears mesh with the second transmission gear respectively.

9. The air pump according to claim 7, characterized in that, The protective shell is also provided with a fixing rod, and the sliding member is provided with a sliding sleeve on the side facing the fixing rod. The sliding sleeve is slidably connected to the fixing rod, and the sliding member is slidably connected to the fixing rod through the sliding sleeve.

10. The air pump according to claim 5 or 6, characterized in that, When the piston assembly is connected to both ends of the slider, the air chambers are located on opposite sides of the protective shell, and the rotary drive is located on one side of the protective shell adjacent to one of the air chambers. The drive assembly further includes a first linkage gear and a second linkage gear arranged coaxially. The first linkage gear is located inside the protective shell and is meshed with the first drive gear. The two second drive gears are respectively meshed with the second linkage gear.

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