Inflator pump shell and inflator pump

Abstract

The inflator pump comprises an inflator pump machine core arranged in the inflator pump machine shell, the interior of the inflator pump machine shell is divided into a machine core assembly chamber, an air inlet is formed in one side of the machine core assembly chamber, and the other side of the machine core assembly chamber is provided with a rectification area with a vortex space and an air outlet communicated with the rectification area. The inflator pump machine core is arranged in the machine core assembling chamber, an impeller connected with a motor of the inflator pump machine core is located in the vortex space of the rectification area, when the motor is started, the impeller is synchronously driven to rotate so that airflow can be introduced from an air inlet of the inflator pump machine shell, the airflow absorbs heat through the outer surface of the inflator pump machine core, and hot airflow is brought into the vortex space of the rectification area from the machine core assembling area. The hot air flow is quickly discharged from the air outlet by the vortex generated by the rotational motion of the impeller in the vortex space, so that the air pump shell can be combined with the impeller to improve the heat dissipation efficiency.

Description

[Technical field]

[0001] The present invention relates to the field of an inflating device capable of inflating objects such as tires and balls, and in particular to an electric inflator pump. [Background technology]

[0002] The electric air pump currently used to inflate objects such as tires and balls mainly has an air pump movement and a battery that provides electrical energy to the air pump movement installed in a housing. The air pump movement includes an electric motor installed at the bottom of a base, and a cylinder tube installed on one side of the base. A piston rod is installed in the cylinder tube. The motor's spindle extends to the top surface of the base and is connected to the rear end of the piston rod by a gear set. An air charging joint with a one-way valve is installed at the end of the cylinder tube. A fan is installed on the rotor of the electric motor, so that when the electric motor drives the piston rod, the fan is driven to rotate to generate a heat dissipation airflow, and the heat generated by the air pump movement is discharged to the outside through the heat dissipation holes of the housing by the heat dissipation airflow.

[0003] Although the aforementioned known air pump can provide a device for inflating the pressurized space to be inflated, it is well known that when the piston rod of the air pump movement is driven in the pressurized space in the cylinder tube, a high heat will be generated, and at the same time, the motor will also generate a high heat when it is running. Because the existing air pump products install the air pump movement and the battery together in the casing, the battery and the air pump movement in the casing cannot be separated, and the casing cannot provide a proper airflow guide mechanism for the heat dissipation airflow generated by the fan, so that the heat dissipation effect that the heat dissipation airflow can achieve is limited. Not only is the high temperature likely to affect the service life of the air pump movement, but the high temperature generated by the operation of the air pump movement will also have an adverse effect on the safety of the battery. [Summary of the invention]

[0004] The purpose of the present invention is to provide an air pump housing and an air pump, so as to improve the technical problems that the housing of the existing air pump cannot provide proper airflow guidance and it is difficult to provide sufficient heat dissipation performance for the high temperature generated when the air pump movement is working.

[0005] In order to achieve the aforementioned objectives, the air pump housing proposed in the present invention has a partition wall panel inside, which divides the internal space of the air pump housing into a accommodating chamber, a movement assembly chamber and a rectification area. The air pump housing has an air inlet and an air outlet on two different sides, respectively. The air inlet is connected to one end of the movement assembly chamber, the rectification area is connected to the other end of the movement assembly chamber, and the air outlet is connected to the rectification area. The rectification area forms a vortex space toward the air outlet, and the air outlet is connected to the air inlet through the rectification area and the movement assembly chamber to form an airflow channel.

[0006] In order to achieve the above-mentioned object, the air pump proposed by the present invention includes an air pump housing as described above and an air pump movement, the air pump movement is installed in the movement assembly chamber of the air pump housing and extends into the rectification area, and includes: A housing seat, comprising a seat plate portion, a side plate portion formed at one end of the seat plate portion, a cylinder tube formed at the side plate portion, and two triangular side plate portions formed at opposite sides between the seat plate portion and the side plate portion, the two triangular side plate portions extending from the side plate portion to the other end of the seat plate portion, a transmission space being formed between the side plate portion and the seat plate portion, and the cylinder tube having a connecting end portion; A shell cover, which is detachably assembled and tightly mounted on the shell base and covers the transmission space; An electric motor is mounted on the base plate of the housing, and includes a rotor, one end of which extends into the transmission space. A piston rod is installed in the cylinder tube of the housing and extends into the transmission space; a transmission assembly installed in the transmission space of the housing and connecting the piston rod and the rotor of the motor; and an air charging joint installed in the connecting end of the cylinder pipe and comprising a joint body and a one-way valve installed in the joint body; and An impeller is installed in the rectification area of ​​the air pump housing. The impeller is located in the vortex space and is connected to the rotor of the motor.

[0007] By means of the aforementioned air pump casing and the air pump including the air pump casing, a partition wall is arranged in the air pump casing to separate a movement assembly room, an air inlet is arranged on one side of the movement assembly room, a rectification area with a vortex space and an air outlet connected to the rectification area are arranged on the other side of the movement assembly room, and an air flow channel with a drainage function is formed, so as to provide an air pump movement arranged in the movement assembly room, and an impeller connected to the motor is located in the vortex space of the rectification area. When the motor is started, the impeller is synchronously driven to rotate, so as to introduce a cold air flow from the air inlet of the air pump casing, and the cold air flow absorbs heat through the outer surface of the air pump movement, and the hot air flow is brought from the movement assembly area to the vortex space of the rectification area, and the vortex generated by the rotational motion of the impeller in the vortex space efficiently discharges the hot air flow from the air outlet, so that the air pump casing can be combined with the impeller to improve the heat dissipation efficiency. On the other hand, by dividing the room into a storage room and a movement assembly room through a partition wall, the heat generated by the air pump movement installed in the movement assembly room when it is working is blocked by the partition wall, preventing the heat from being transferred to the power storage components or power cords with plugs in the storage room, thereby ensuring the safety of the power storage components, power cords and air pumps.

[0008] In the air pump of the present invention, the shell seat of the air pump movement is used to integrally form a cylinder tube on its side plate portion, and triangular side plates are formed on both sides of the seat plate portion and the side plate portion of the shell seat, forming a triangular slope type enclosing structure, which increases the bonding strength between the cylinder tube and the side plate portion, and can assist in the heat dissipation generated when the piston rod moves in the cylinder tube, thereby extending its service life, and can reduce the amount of material used in the shell seat, reduce costs and reduce weight, while simplifying its structure, increasing the ease of assembly, and eliminating the assembly step of the conventional separate cylinder tube installed on the side plate portion; on the other hand, a closed space is formed by the shell cover being tightly covered at the opening of the transmission space of the shell seat, effectively preventing the noise of the transmission component and the piston rod moving in the shell seat from being transmitted outward, thereby effectively reducing the noise.

[0009] In the air pump of the present invention, the shell cover and the shell seat can be further combined into a snap-fit ​​structure to improve the assembly convenience between the two and reduce the cost.

[0010] In the air pump of the present invention, the seat plate portion of the shell seat can be further used to form abutment protrusions and at least one heat dissipation interval located on the side of the abutment protrusions. The abutment protrusions abut the motor housing of the motor, and the heat dissipation holes in the motor housing correspond to the heat dissipation intervals, which helps the hot air generated when the motor is running to be discharged to the outside through the heat dissipation holes of the motor housing and the heat dissipation intervals at the corresponding positions. Furthermore, the abutment protrusions can form a cross-shaped block with four protrusions. The rotor of the motor passes through the center position of the cross-shaped abutment protrusions, and there is a heat dissipation interval between every two adjacent protrusions. The shell seat can support the motor stably through the abutment protrusions, which is beneficial to the heat dissipation of the motor.

Brief Description of the Drawings

[0011] Figure 1 It is a perspective exploded schematic diagram of an air pump housing according to an embodiment of the present invention. Figure 2 for Figure 1 The illustrated embodiment of the air pump housing is a partial three-dimensional exploded schematic diagram of a half shell being separated after the air pump movement and the power storage component are installed to form an air pump. Figure 3 for Figure 1 The illustrated embodiment is a schematic three-dimensional exploded view of an air pump housing, an air pump core, and a power storage component. Figure 4 for Figure 2 The illustrated schematic plan view shows that half of the air pump housing embodiment is equipped with an air pump movement and a power storage component. Figure 5 for Figure 4 The schematic cross-sectional view of the entire air pump housing embodiment and the impeller of the air pump movement in the direction of the cutting line AA is shown. Figure 6It is a perspective exploded schematic diagram of another embodiment of the air pump of the present invention. Figure 7 for Figure 6 The illustrated partial exploded schematic diagram of another embodiment of the air pump housing after the air pump core and the power storage assembly are installed to form an air pump, with half of the housing and a portion of the air guide cover separated. Figure 8 for Figure 7 The figure shows a cross-sectional view of another embodiment of the entire air pump housing and the impeller of the air pump movement. Fig. 9 for Figure 3 , Figure 7 A schematic three-dimensional appearance diagram of an air pump movement installed in an air pump housing is shown. Fig.10 for Fig. 9 A three-dimensional exploded schematic diagram of the air pump movement shown. Fig.11 for Fig. 9 A schematic cross-sectional view of the air pump movement shown. Fig.12 for Fig. 9 A schematic side cross-sectional view of the air pump movement shown. Fig.13 for Fig.10 A three-dimensional schematic diagram of the base of the air pump movement shown from another perspective. Fig.14 for Fig. 9 A three-dimensional schematic diagram of the air pump movement from another perspective is shown. [Specific implementation method]

[0012] According to the above-mentioned invention contents, the present invention includes an air pump housing and an air pump including the air pump housing. The specific structures of the air pump housing and the air pump are described as follows.

[0013] like Figure 1 and Figure 6 As shown, two embodiments of the air pump housing of the present invention are disclosed. As can be seen from the drawings, the air pump housing 2 includes a plurality of detachable housing components. In the present embodiment, the air pump housing 2 is composed of two half shells 2A and 2B that can be relatively combined. The two half shells 2A and 2B can be screwed or snap-fitted together. In addition, the air pump housing 2 can also be changed to consist of a shell and a shell cover that can be relatively combined. The shell and the shell cover can be screwed or snap-fitted together, but not limited to this.

[0014] like Figure 1 and Figure 6As shown, a partition wall 20 is provided inside the air pump housing 2, and the internal space of the air pump housing 2 is divided into a receiving chamber 21, a movement assembly chamber 22 and a rectifying area 23. The partition wall 20 blocks the heat transfer between the movement assembly chamber 22 and the receiving chamber 21. An air inlet 24 and an air outlet 25 are provided on two different sides of the air pump housing 2, respectively. The air inlet 24 is connected to one end of the movement assembly chamber 22, the rectifying area 23 is connected to the other end of the movement assembly chamber 22, and the air outlet 25 is connected to the rectifying area 23. The rectifying area 23 forms a vortex space 230 toward the air outlet 25. The air outlet 25 is connected to the air inlet 24 through the rectifying area 23 and the movement assembly chamber 22 to form an air flow channel 220. The air pump housing 2 also has a through hole 27 connected to one end of the movement assembly chamber 22 . The through hole 27 is adjacent to the air inlet 24 and is located on one side of the air pump housing 2 . Alternatively, the through hole 27 is located on one side of the air pump housing 2 adjacent to the air inlet 24 .

[0015] like Figure 1 and Figure 6 In the embodiment shown, the air pump housing 2 is provided with a partition 26 between the rectifying area 23 and the movement assembly chamber 22, and a through hole 261 is provided in the partition 26, so that the rectifying area 23 is connected to the movement assembly chamber 22 through the through hole 261. Figure 1 As shown, the air pump housing 2 forms a spiral rectifying guide plate 28 on the inner peripheral wall of the rectifying area 23, or as shown in FIG. Figure 6 As shown, the air pump housing 2 is provided with a vortex-shaped fairing 29 in the fairing area 23. Figure 1 and Figure 6 As shown, the vortex space 230 facing the air outlet 25 is formed in the rectifier area 23 by the rectifier guide plate 28 and the rectifier cover 29. The rectifier guide plate 28 and the rectifier cover 29 can be designed as separate components according to the combination structure of the detachable multiple shell components of the air pump housing 2.

[0016] like Figures 2 to 5 as well as Figures 7 and 8 As shown, the air pump housing 2 can accommodate an air pump movement 1, and the impeller 16 of the air pump movement 1 is located in the vortex space 230 of the rectification area 23. When the impeller 16 is driven to rotate, a cold air flow can be introduced from the air inlet 24 of the air pump housing 2. The cold air flow absorbs heat through the outer surface of the air pump movement 1, and the hot air flow is brought from the movement assembly area 22 to the vortex space 230 of the rectification area 23. The vortex generated by the rotation of the impeller 16 in the vortex space 230 can efficiently and quickly discharge the hot air flow from the air outlet 25, so that the air pump housing can be combined with the impeller to improve the heat dissipation efficiency.

[0017] like Figure 2 , Figure 3 and Figure 7As shown, it discloses two embodiments of the air pump of the present invention, the air pump includes an air pump housing 2 and an air pump movement 1, or further includes a power storage component 3 or a power cord with a plug. The structure of the air pump housing 2 is as described above, and will not be repeated here. The air pump movement 1 is installed in the movement assembly chamber 22 of the air pump housing 2 and extends to the rectification area 23. The power storage component 3 can be a rechargeable battery, etc. The power storage component 3 is installed in the accommodating chamber 21 of the air pump housing 2. The air pump housing 2 can also be equipped with a switch, which electrically connects the power storage component 3 and the air pump movement 1 to control the start and stop of the air pump movement 1. In addition, when the power storage component is not provided in the accommodating chamber 21 of the air pump housing 2, the accommodating chamber 21 can also provide an accommodating space for connecting the power cord of the air pump movement 1, and the air pump movement 1 can be started by connecting the power cord to an external power source.

[0018] like Fig. 9 and Fig.10 As shown, the composition structure of the air pump movement 1 includes a housing base 10, a housing cover 11, an electric motor 12, a piston rod 13, a transmission assembly 14, an air charging joint 15 and an impeller 16.

[0019] like Fig. 9 and Figures 10 to 12 As shown, the housing 10 has X-axis, Y-axis and Z-axis directions which are perpendicular to each other in a three-dimensional space, and includes a seat plate portion 101, a side plate portion 102, a cylinder tube 103 and two triangular side plate portions 104. The side plate portion 102 is formed at one end of the X-axis direction of the seat plate portion 101 and extends along the Z-axis direction. A transmission space 100 is formed between the side plate portion 102 and the seat plate portion 101. The cylinder tube 103 is integrally formed on the outer side of the side plate portion 102 and extends along the X-axis direction. The cylinder tube 103 has a cylinder chamber, which is connected to the transmission space 100 through the side plate portion 102. The cylinder tube 103 is away from One end of the side plate 102 has a connecting end 1031, and the two triangular side plates 104 are respectively located on both sides of the Y-axis direction of the assembly interval and extend from the side plate 102 to the other end of the seat plate 101 along the X-axis direction. The two triangular side plates 104 are respectively located on both sides of the Y-axis direction of the transmission space 100 and connect the seat plate 101 and the side plate 102, so as to reinforce the seat plate 101 and the side plate 102 of the shell seat 10, improve the mechanical strength of the shell seat 10, and at the same time, the shell seat 10 can form a triangular slope type enclosure structure, reduce the amount of materials used in the shell seat 10, reduce costs and reduce weight. On the other hand, the cylinder tube 103 is integrally formed on one side of the side plate 102, so that its structure is simplified, the assembly convenience is improved, and the assembly step of installing the separate cylinder tube 103 on the side plate 102 can be eliminated.

[0020] like Fig. 9and Figures 10 to 12 As shown, the shell cover 11 can be detachably mounted on the shell base 10, and the periphery of the shell cover 11 can closely contact the edges of the base plate portion 101, the side plate portion 102 and the two triangular side plate portions 104 of the shell base 10, and the shell cover 11 and the shell base 10 can be fixed by a snap-fit ​​method or a screw-locking method. In this embodiment, the shell cover 11 and the shell base 10 are fixed by a snap-fit ​​method, so that it has the function of easy disassembly and assembly, and the shell cover 11 is closely covered at the opening of the transmission space 100 of the shell base 10 to form a closed space.

[0021] like Fig. 9 , Fig.10 and Fig.12 As shown, the motor 12 is mounted on the outside of the seat plate portion 101 of the housing 10 and fixed by screws and other fixing components. The motor 12 includes a motor housing, a stator mounted in the motor housing and a rotor 122 pivotally mounted in the stator. One end of the rotor 122 passes through the seat plate portion 101 and extends into the transmission space 100, and the other end of the rotor 122 can be connected to the impeller 16.

[0022] like Fig.10 , Figure 12 to Figure 14 As shown, the motor housing of the motor 12 has one or more heat dissipation holes 123 on one side facing the seat plate portion 101. The seat plate portion 101 of the housing seat 10 can further form an abutting protrusion 105 and at least one heat dissipation interval 106 located on the side of the abutting protrusion 105. The abutting protrusion 105 can abut the motor housing of the motor 12. The heat dissipation holes 123 correspond to the heat dissipation interval 106, so that the hot air flow generated when the motor 12 is running is discharged to the outside through the heat dissipation holes 123 of the motor housing and the heat dissipation interval 106 at the corresponding position. In this embodiment, the abutting protrusion 105 forms a cross-shaped block with four protrusions. The rotor 122 of the motor 12 passes through the center position of the cross-shaped abutting protrusion 105, and there is a heat dissipation interval 106 between every two adjacent protrusions. The housing seat 10 can support the motor 12 stably through the abutting protrusion 105, and it is beneficial to the heat dissipation of the motor 12.

[0023] like Fig.10 , Fig.11 and Fig.12 As shown, the piston rod 13 can be installed in the cylinder tube 103 of the housing 10 in a linear reciprocating manner and extends to the transmission space 100. In this embodiment, the piston rod 13 has a rod portion 131 and a piston ring 132. One end of the rod portion 131 is a piston head 1311, and the other end is a pivot end 1312. The piston ring 132 is sleeved on the outer circumference of the piston head 1311 and can closely contact the inner wall of the cylinder tube 103. The pivot end 1312 is located in the transmission space 100.

[0024] like Fig.10 , Fig.11 and Fig.12 As shown, the transmission assembly 14 is installed in the transmission space 100 of the housing 10 and connected between the piston rod 13 and the rotor 122 of the motor 12, so that the power output by the motor 12 drives the piston rod 13 to reciprocate linearly in the cylinder tube 103 of the housing 10 through the transmission assembly 14. In this embodiment, the transmission assembly 14 includes a driving gear 141 and a driven gear 142, the driving gear 141 is assembled with one end of the rotor 122 of the motor 12, the driven gear 142 is pivoted on the seat plate of the housing 10, and meshes with the driving gear 141, and the pivot end 1312 of the piston rod 13 is eccentrically pivoted on the driven gear 142. The driving gear 141 is a small gear, and the driven gear 142 is a large gear larger than the driving gear 141 . The driven gear 142 forms a hollow portion at a position adjacent to the eccentric pivot of the piston rod 13 to reduce material usage, reduce weight, and reduce the load of the motor 12 .

[0025] like Fig.10 , Fig.11 and Fig.12 As shown, the inflation joint 15 is installed at the connecting end 1031 of the cylinder tube 103 of the shell base 10 and is exposed outside the inflation pump housing 2. The inflation joint 15 includes a joint body 151 and a one-way valve 152 installed in the joint body 151. The joint body 151 has an inflation end 153 relative to the other end of the cylinder. The one-way valve 152 can control the pressurized air in the cylinder tube 103 to be output unidirectionally toward the inflation end 153.

[0026] like Figures 2 to 5 , Figure 7 and Figure 8 As shown, the impeller 16 is installed in the rectification area 23 of the air pump housing 2, the impeller 16 is located in the vortex space 230 and connected to the other end of the rotor 122 of the motor 12, and the impeller 16 can be driven to rotate by the motor 12. Preferably, the impeller 16 is a centrifugal impeller, so that it can take in air axially and discharge air radially, so that the impeller 16 is combined with the vortex space 230 to extract hot air from the core assembly chamber 22 of the air pump housing 2, enter the vortex space 230 of the rectification area 23 through the through hole 261 in the partition 26, and then be discharged outside the air pump housing 2 through the air outlet.

[0027] like Figures 2 to 5 , Figure 7 and Figure 8As shown, when the air pump is used, the air end 153 of the air connector 15 can be connected to an air duct, the end of the air connector has a connector, and the tire to be inflated is connected to the tire through the connector, the motor 12 of the air pump movement 1 is started through the switch, and the piston rod 13 is driven to reciprocate in the cylinder tube 103 of the housing seat 10 through the transmission component 14 to generate pressurized air, and the pressurized air is input into the object to be inflated through the air connector 15 and the air duct. On the other hand, when the motor 12 is started, the impeller 16 is synchronously driven to rotate, and the air flow is introduced through the air inlet 24 of the air pump housing 2. The air flow absorbs heat through the outer surface of the air pump movement 1, and the heat of the air pump movement 1 is brought from the movement assembly area to the vortex space 230 of the rectification area 23, and then the hot air flow is quickly discharged from the air outlet 25 by the vortex generated by the rotation of the impeller 16 in the vortex space 230.

Explanation of symbols

[0028] 1: Air pump movement 10: Shell seat 100: Transmission space 101: Seat plate 102: Side plate 103: Cylinder pipe 1031: Connection end 104: Triangular side panel 105: contact bump 106: Heat dissipation zone 11: Shell cover 111: Chimeric part 112: Hook 12: Electric Motor 121: Motor housing 122: Rotor 123: Heat dissipation holes 13: Piston rod 131: Rod 1311: Piston head 1312: Pivot end 132: Piston ring 14: Transmission components 141: Driving gear 142: Driven gear 15: Inflatable connector 151: Connector body 152: One-way valve 153: Inflatable end 16: Impeller 2: Air pump housing 2A, 2B: Half shell 20: Partition wall panels 21: Accommodation Room 22: Movement assembly room 220: Airflow channel 23: Rectification area 230: Vortex Space 24: Air Inlet 25: Air outlet 26: Partition 261:Through hole 27:Piercing 28: Rectification guide plate 29: Fairing 3: Power storage components.

Claims

1. An air pump housing, characterized in that: A partition wall is provided inside the air pump housing, which divides the internal space of the air pump housing into a accommodating chamber, a movement assembly chamber and a rectification area. An air inlet and an air outlet are respectively provided on two different sides of the air pump housing. The air inlet is connected to one end of the movement assembly chamber, the rectification area is connected to the other end of the movement assembly chamber, and the air outlet is connected to the rectification area. The rectification area forms a vortex space toward the air outlet, and the air outlet is connected to the air inlet through the rectification area and the movement assembly chamber to form an air flow channel.

2. The air pump housing according to claim 1, characterized in that: The air pump housing forms a vortex-shaped rectifying guide plate on the inner peripheral wall of the rectifying area, and the vortex space facing the air outlet is formed in the rectifying area.

3. The air pump housing according to claim 1, characterized in that: The air pump housing is provided with a vortex-shaped fairing in the fairing area, and the vortex space facing the air outlet is formed in the fairing area.

4. The air pump housing according to claim 1, characterized in that: The air pump housing also has a through hole connected to one end of the movement assembly chamber, and the through hole is adjacent to the air inlet and is located on one side of the air pump housing.

5. An air pump, characterized in that: include: An air pump housing as claimed in any one of claims 1 to 4; as well as An air pump movement, which is installed in the movement assembly chamber of the air pump housing and extends into the rectification area, and includes: A housing seat, comprising a seat plate portion, a side plate portion formed at one end of the seat plate portion, a cylinder tube formed at the side plate portion, and two triangular side plate portions formed at opposite sides between the seat plate portion and the side plate portion, the two triangular side plate portions extending from the side plate portion to the other end of the seat plate portion, a transmission space being formed between the side plate portion and the seat plate portion, and the cylinder tube having a connecting end portion; A shell cover, which is detachably assembled and tightly mounted on the shell base and covers the transmission space; An electric motor is mounted on the base plate of the housing, and includes a rotor, one end of which extends into the transmission space. A piston rod is installed in the cylinder tube of the housing and extends into the transmission space; a transmission assembly installed in the transmission space of the housing and connecting the piston rod and the rotor of the motor; and an air filling joint installed in the connecting end of the cylinder tube; and An impeller is installed in the rectification area of ​​the air pump housing. The impeller is located in the vortex space and is connected to the rotor of the motor.

6. The air pump according to claim 5, characterized in that: A power storage component or a power cord with a plug electrically connected to the motor is arranged in the accommodation chamber of the air pump housing.

7. The air pump according to claim 5, characterized in that: The shell cover can be snap-fitted and fixed on the shell base.

8. The air pump movement according to claim 5, characterized in that: The transmission assembly includes a driving gear and a driven gear. The driving gear is connected to the rotor of the motor. The driven gear is pivoted on the seat plate of the housing seat and meshes with the driving gear. The eccentric pivot of the piston rod is arranged on the driven gear.

9. The air pump movement according to any one of claims 6 to 8, characterized in that: A motor housing of the motor disposed outside the rotor has at least one heat dissipation hole on a side facing the seat plate; The seat plate portion of the housing seat forms a contact protrusion and at least one heat dissipation zone located on the side of the contact protrusion. The contact protrusion can contact the motor housing of the motor, and the position of the heat dissipation hole corresponds to the heat dissipation zone.

10. The air pump movement according to claim 9, characterized in that: The abutting protrusion forms a cross-shaped block with four protrusions. The rotor of the motor passes through the center position of the cross-shaped abutting protrusion, and there is a heat dissipation zone between every two adjacent protrusions.

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