Air pump head, air pump and air pump movement

Abstract

The present invention discloses an air pump head, an air pump and an air pump movement, wherein the air pump head includes a shell, a support member is provided in the shell, including a base plate and a cylinder body and a connecting portion formed on the base plate, and the connecting portion is fixed in the shell; a transmission shaft can rotate and is vertically provided on the base plate, and its axis is perpendicular to the axis of the cylinder body; a driving shaft is connected to the transmission shaft through a connecting member, and the axis of the driving shaft is parallel to the axis of the transmission shaft and can revolve around the transmission shaft; a piston is telescopically provided in the cylinder body and the outer end is pivotally connected to the driving shaft; an air outlet head is connected to the front end of the air outlet of the cylinder body and fixed at the outlet of the shell. The shell of this solution only needs to be assembled with the support member, and there is no need to provide multiple mounting structures on the shell. During assembly, the transmission shaft, the driving shaft, the piston and the air outlet head can be assembled on the support member to form a whole, and then the whole can be installed on the shell. They can be assembled separately, which is conducive to improving assembly efficiency and flexibility.

Description

Technical Field

[0001] The present invention relates to the field of electric tools, in particular to an air pump head, an air pump and an air pump movement. Background Art

[0002] An electric air pump is a device that inflates an air cylinder by driving a piston to reciprocate and extend within the cylinder via a motor. Conventional electric air pump structures include the mechanism disclosed in application number 201620123152.5. Correspondingly, the motor drives the piston to reciprocate within the cylinder via a driving gear, a driven gear, and an eccentric mass mounted on the driven gear.

[0003] In this structure, it is necessary to provide certain mounting structures in the air pump housing to install the motor, cylinder body and driven gear respectively, which easily complicates the structure inside the housing and increases the difficulty of installation. More importantly, this structure is not convenient for assembling the cylinder, piston, eccentric lump, driving gear and driven gear into one piece outside the housing and then assembling them into the housing. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems existing in the prior art and to provide an air pump head, an air pump and an air pump movement.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The air pump head comprises a shell, wherein the shell is provided with

[0007] The support member includes a base plate, a cylinder body formed on the base plate, and a connecting portion, wherein the connecting portion is fixed in the housing;

[0008] a transmission shaft, rotatable and vertically arranged on the base plate, with its axis being perpendicular to the axis of the cylinder body;

[0009] A driving shaft connected to the transmission shaft via a connecting member, wherein the axis of the driving shaft is parallel to the axis of the transmission shaft and can revolve around the transmission shaft;

[0010] A piston, telescopically disposed in the cylinder body and having an outer end pivotally connected to the driving shaft;

[0011] An air outlet head is connected to the front end of the air outlet of the cylinder body and fixed at the outlet of the shell.

[0012] Preferably, in the air pump head, the transmission shaft is coaxially connected to a transmission gear, the transmission gear is meshed with a gear shaft, the gear shaft is parallel to the transmission shaft and is rotatably arranged on a support sleeve fixed in the outer shell, the connecting part and the cylinder body are located on two sides of the base plate, and the connecting plate is screwed to the support sleeve.

[0013] Preferably, in the air pump head, blades for generating airflow toward the substrate are formed on the transmission gear.

[0014] Preferably, in the air pump head, a vent hole is formed on the base plate and is located opposite to the transmission gear.

[0015] Preferably, in the air pump head, the vent hole is an arc-shaped hole, and the width of the end facing the transmission gear is greater than the width of the end facing away from the transmission gear.

[0016] Preferably, in the air pump head, air holes are formed on the shell.

[0017] Preferably, in the air pump head, a connector is provided on the outer shell, and the connector includes a plug-in portion and a limiting portion extending to the outside of the outer shell, and the side wall of the plug-in portion is formed with a boss, and the boss cooperates with the portion of the limiting portion protruding outside the side wall of the plug-in portion to form a slot; the connecting shaft or the gear shaft in the transmission mechanism connected to the connecting shaft for torque transmission is coaxial and connected to the torque transmission spline connector, and the spline connector is rotatably arranged at the center hole of the connector, and the spline connector is rotatably arranged at the center hole of the connector.

[0018] Preferably, in the inflation pump head, the connecting head is clamped on the outer shell, the inner end of the connecting head is connected to the support sleeve in the transmission mechanism, and the support sleeve is threadedly connected to the connecting part.

[0019] Preferably, in the air pump head, a bearing fixing seat is provided at the bottom of the base plate, a bearing is provided in the bearing fixing seat, and the transmission shaft is fixed in the inner hole of the bearing.

[0020] Preferably, in the air pump head, the connecting part includes a socket coaxial with the transmission shaft and a semicircular body and a connecting body located on opposite sides of the socket, a push shaft connecting hole is formed at the connecting body, and the length and width of the connecting body do not exceed the radius of the semicircular body.

[0021] Preferably, in the inflation pump head, the driving shaft is pivotally connected to the piston via a bearing coaxially connected thereto.

[0022] Preferably, in the air pump head, the external connector of the air outlet head extends to the outlet of the outer shell, the external connector is detachably connected to the air outlet pipe and is fixedly connected to the outer shell through the air outlet pipe, and the outer diameter of the part where the air outlet pipe is connected to the external connector is equivalent to the inner diameter of the outlet of the outer shell.

[0023] Preferably, in the air pump head, the air outlet pipe includes a first pipe, a second pipe and a pressure gauge connecting them.

[0024] Air pump movement, including

[0025] A support member including a base plate and a cylinder body and a connecting portion formed on the base plate;

[0026] a transmission shaft, rotatable and vertically arranged on the base plate, with its axis being perpendicular to the axis of the cylinder body;

[0027] A driving shaft connected to the transmission shaft via a connecting member, wherein the axis of the driving shaft is parallel to the axis of the transmission shaft and can revolve around the transmission shaft;

[0028] The piston is telescopically arranged in the cylinder body and the outer end of the piston is pivotally connected to the driving shaft.

[0029] An air pump comprising any of the above-mentioned air pump heads.

[0030] The advantages of the technical solution of the present invention are mainly reflected in:

[0031] The structural design of this solution makes the structure inside the shell based on the support part. It only needs to assemble the support part and the shell into one piece. The support part is formed in one piece, which is convenient for processing and installation. At the same time, there is no need to set up multiple structures for installing various parts on the shell. In addition, the structure of this solution can first assemble the transmission shaft, push shaft, piston and air outlet head on the support part to form a whole, and then install the whole on the shell, so that the structure inside the shell has better integrity and stability, and can be assembled separately, which is conducive to improving assembly efficiency and flexibility.

[0032] The inflation pump head of this solution is provided with a connector and a transmission mechanism, so there is no need to integrate a motor, and it can be made smaller in size and can be used in conjunction with an existing drive host.

[0033] The transmission shaft of this solution is connected to the transmission mechanism, and airflow blades are formed on the transmission gear of the transmission mechanism, which can cool the structure inside the shell, which is beneficial to reducing the impact of operating temperature on the operation of the equipment.

[0034] The substrate of this solution is provided with specially shaped vent holes, which can facilitate airflow passing through the substrate to cool the structure above the substrate. At the same time, the special shape of the vent holes can form a cyclone to improve the cooling effect.

[0035] This solution adopts a method in which the connecting head is clamped with the shell, the support sleeve is screwed with the shell, and the connecting part of the support member is screwed with the support sleeve. This can simplify the installation structure required on the shell to the greatest extent. At the same time, it makes the overall structure composed of the connecting head, the support head, the support member and the structure on the support member easier to assemble with the shell, thereby improving assembly efficiency.

[0036] This solution supports the air outlet head through the air outlet pipe, without the need for a complicated installation structure. At the same time, it can effectively support one end of the cylinder body of the support frame, so that both ends of the support frame can be effectively fixed, avoiding the problem of poor cooperation with the piston caused by tilting of the cylinder body.

[0037] The driving host of this solution can effectively assemble the twist ring and the fixing block into a whole by providing matching arc-shaped barrel holes and limit hooks on the twist ring and the fixing block, thereby facilitating installation and ensuring the stability of the structure.

[0038] The limiting hook of this solution is arranged on the limiting protrusion, which can reduce the length of the limiting hook and effectively reduce the space occupied by the limiting hook to avoid interference with other structures on the fixed block.

[0039] In this solution, an arc-shaped groove for accommodating the return spring is formed on the torsion ring, and a limiting boss embedded in the arc-shaped groove is formed on the fixed block, which can effectively compress the return spring and make the return spring play a role. By designing the shape of the arc-shaped groove, the limiting spring can be conveniently installed in the arc-shaped groove, which is convenient for assembly operation. Combined with the shielding part on the fixed block, the return spring can be effectively restricted to prevent the return spring from exiting the arc-shaped groove. The integrity and stability of the structure are better, and it is easier to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a cross-sectional view of the inflation pump head of the present invention (the main structure of the air outlet pipeline is hidden in the figure);

[0041] Figure 2 is a three-dimensional diagram of the inflation pump head of the present invention (one side of the housing is hidden in the figure);

[0042] Figure 3 is a perspective view of a support member of the present invention;

[0043] Figure 4 is a bottom view of the support member of the present invention;

[0044] Figure 5 This is a three-dimensional diagram of the main structure of the air pump head of the present invention, with one side of the shell and the air outlet pipe hidden;

[0045] Figure 6 is a perspective view of a connector of the present invention;

[0046] Figure 7 is an end view of the transmission gear of the present invention;

[0047] Figure 8 is a front view of the connector of the present invention;

[0048] Figure 9 This is an exploded view of the air pump head and the driving main unit of the air pump of the present invention;

[0049] Figure 10 This is a three-dimensional diagram of the driving host of the present invention, wherein the left half of the host housing is hidden;

[0050] Figure 11 is a cross-sectional view of a driving host of the present invention;

[0051] Figure 12 It is a three-dimensional diagram of the twisting ring and the fixing block connected as one body in the present invention;

[0052] Figure 13 is a three-dimensional diagram of the twist ring of the present invention;

[0053] Figure 14 This is a schematic diagram of the positional relationship between the head locking block and the fixed block in the present invention;

[0054] Figure 15 It is a three-dimensional diagram of the fixing block in the present invention;

[0055] Figure 16 This is a cross-sectional end view of the drive host of the present invention, wherein the left half of the host housing is hidden. DETAILED DESCRIPTION

[0056] The objects, advantages, and features of the present invention are illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of the application of the technical solutions of the present invention, and any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

[0057] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0058] Example 1

[0059] The following describes the air pump head disclosed by the present invention in conjunction with the accompanying drawings. Figure 1 , Attachment Figure 2 As shown, it includes a housing 100, in which a

[0060] The support member 200 includes a base plate 210, a cylinder body 220 formed on the base plate 210, and a connecting portion 230, wherein the connecting portion 230 is fixed in the housing 100;

[0061] The transmission shaft 300 is rotatable and vertically arranged on the base plate 210, and its axis is perpendicular to the axis of the cylinder body 220;

[0062] A driving shaft 400 is connected to the transmission shaft 300 via a connecting member 500 . The axis of the driving shaft 400 is parallel to the axis of the transmission shaft 300 and can revolve around the transmission shaft 300 .

[0063] A piston 600 is telescopically disposed in the cylinder body 600 and has its outer end pivotally connected to the driving shaft 400;

[0064] The air outlet head 700 is connected to the front end of the air outlet 221 of the cylinder body 220 and fixed at the outlet 110 of the housing 100 .

[0065] The structural design of this solution makes the structure inside the shell based on the support member 200, and the support member is formed in an integral manner, which is convenient for processing and installation, and is also conducive to simplifying the installation structure required to install various parts on the shell. During the overall assembly, the transmission shaft, push shaft, piston and air outlet head can be assembled on the support member first, and then installed as a whole on the shell. The operations can be carried out separately, which is conducive to improving assembly efficiency; it can further improve the integrity of the internal structure after assembly.

[0066] When the air pump head is needed for inflation, the transmission shaft 300 can be connected to the reduction motor and driven to rotate. The transmission shaft 300 drives the push rod 400 to rotate and then push the piston 600 to reciprocate and extend in the cylinder body 220 to achieve inflation.

[0067] As attached Figure 1 , Attachment Figure 2 As shown, the housing 100 may be of various known feasible structures. Preferably, it includes two half-divided shells 120 that are assembled into one by screw connection.

[0068] As attached Figure 1 -Attached Figure 3As shown, the cylinder body 220 is formed on the top surface of the base plate 210, and the connecting portion is formed on the bottom surface of the base plate. The cylinder body 220 and the connecting portion 230 are located at both ends of the base plate. Of course, the connecting portion 230 can also be located at other locations on the bottom surface of the base plate. The connection portion 230 is provided at the end of the base plate 210 to allow the support member to be assembled with other structures at the minimum size. The details will be explained later and are not repeated here.

[0069] As attached Figure 4 As shown, since the base plate 210 carries a large number of parts, in order to improve its structural strength, a plurality of reinforcing parts 211 are formed on the base plate 210 , and the reinforcing parts 211 are located at the bottom of the base plate 210 .

[0070] As attached Figure 3 , Attachment Figure 4 As shown, the base plate 210 is formed with a through hole 212 for the transmission shaft 300 to pass through, and the bottom of the base plate 210 is also formed with a bearing fixing seat 213 corresponding to the through hole. The bearing fixing seat 213 is located on the bottom surface of the base plate 210 relative to the top surface of the base plate 210, which can avoid interference between the bearing fixing seat and the installation space required by the piston, making the height of the cylinder body as low as possible, which is conducive to simplifying the structure of the support member. Figure 1 As shown, a bearing 240 is provided in the bearing fixing seat 213 , and the transmission shaft 300 is fixed in the inner hole of the bearing 240 and passes through the through hole 212 , so that the transmission shaft 300 can rotate relative to the base plate 210 .

[0071] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 5As shown, the transmission shaft 300 can also be connected to a transmission mechanism 800, and the motor (not shown in the figure) is connected through the transmission mechanism 800. The transmission mechanism 800 includes a transmission gear 810 coaxially connected to the lower end of the transmission shaft 300, which is located below the base plate 210. The transmission gear 810 is engaged with a gear shaft 820. The gear shaft 820 is parallel to the transmission shaft 300 and is rotatably arranged on a support sleeve 830 fixed in the housing 100 through a bearing 850. The support sleeve 830 includes a coaxial connecting disk 831 and a plug-in sleeve 832. A blind hole (not shown in the figure) for connecting the connecting part 230 is formed on the connecting disk 831. The axis of the blind hole is parallel to the axis of the support sleeve 830. A through hole 231 corresponding to the blind hole is formed on the base plate 210 and the connecting part 230. The connecting part 230 and the support sleeve 830 are fixed by a screw 260 passing through the through hole 231 and screwed into the blind hole. At this time, the motor used to drive the transmission shaft 300 can be a motor without a reducer. The motor is connected to the gear shaft in the support sleeve 830, and its torque is transmitted to the transmission shaft 300 through the gear shaft 820 and the transmission gear 810.

[0072] In some embodiments, the motor for driving the transmission shaft 300 is directly installed in the housing 100. In this case, the housing also needs to be provided with a control panel, control buttons, batteries or power cords and other structures required for conventional power tools.

[0073] In other embodiments, such as various existing multi-head power tools, the main unit including the motor and the air pump head are separated, so that one main unit can be used to drive different air pump heads (air pump head, vacuum cleaner head, electric drill head, electric hammer head, etc.).

[0074] In order to facilitate the use with various known knob-type hosts (such as the hosts disclosed in application numbers 202021068376.3, 202010315589.X, 202021068376.3, etc.), as shown in the attached Figure 2 , Attachment Figure 6 As shown, a connector 900 is also provided on the outer shell of the inflation pump head, and the connector 900 is fixed on the outer shell 100. It includes a plug-in portion 910 and a limiting portion 920 extending to the outside of the outer shell 100. The plug-in portion 910 is a rectangular tube, and a boss 911 is formed on the side wall of the plug-in portion 910. The boss 911 cooperates with the part of the limiting portion 920 protruding outside the side wall of the plug-in portion to form a slot 930.

[0075] As attached Figure 1 , Attachment Figure 5 , Attachment Figure 6As shown, the gear shaft 820 extends into the inner hole of the limiting portion and is coaxially connected to the spline connector 840. The spline connector 840 includes a socket for the torque transmission spline connection. The outer end of the spline connector 840 is close to the outer end of the connector 900. At the same time, the spline connector 840 is fixed in the inner hole of the bearing 860, and the bearing 860 is fixed in the center hole 940 of the connector.

[0076] Of course, if the transmission mechanism 800 is not present, the lower end of the transmission shaft 300 can be coaxially connected to the spline connector. In this case, the installation position of the connector 900 can be adaptively adjusted, and the motor in the host needs to use a reduction motor, or the host needs to have a reduction mechanism.

[0077] As attached Figure 6 As shown, in order to facilitate assembly, the side wall of the limiting portion 920 is formed with a snap-fitting ridge 921, as shown in the attached Figure 5 As shown, the inner wall of the shell 100 is formed with a snap-fit ​​groove 130 that matches the snap-fit ​​ridge. During assembly, part of the snap-fit ​​ridge 921 can be snapped into the snap-fit ​​groove 130 of one shell 120 first, and then the two shells 120 can be assembled into one. At this time, the snap-fit ​​grooves 130 on the two shells limit the snap-fit ​​ridge 921, so that the connector 900 can be effectively snap-fitted and fixed to the shell.

[0078] As attached Figure 6 As shown, in order to facilitate the installation of the support sleeve 830, a connection hole 922 for connecting the support sleeve 830 is further formed on the limiting portion 920, and the axis of the connection hole 922 is perpendicular to the base plate 210. Figure 5 As shown, a through-hole 833 corresponding to the connecting hole 922 is formed on the connecting disk 831 of the support sleeve 830. The support sleeve 830 and the connector 900 can be connected by screwing a screw (not shown) through the through-hole 833 to the connecting hole 922. At this time, the plug-in sleeve 832 of the support sleeve 830 is plugged into the inner hole of the limiting portion 920. Furthermore, to facilitate connection, a plug-in sleeve 834 is formed on the end surface of the connecting disk 831 facing the connector, which is coaxial with each of the through-holes. The connecting hole 922 is a countersunk hole, and the diameter of the large-diameter portion of the countersunk hole is equivalent to the outer diameter of the plug-in sleeve 855. Therefore, each plug-in sleeve 835 can be plugged into the large-diameter portion of a connecting hole 922 to achieve rapid positioning.

[0079] At this time, only the snap-in groove 130 needs to be formed on the entire shell 100 to fix the connector 900, without forming other structures to install the support sleeve 830 and the connecting part 230. After assembly, the connector, the support sleeve 830 and the connecting part 230 are integrated into one, which has better integrity and is more compact. It is also convenient to assemble it into one with the shell 100 after external assembly.

[0080] In addition, during operation, the shell may generate high temperature due to the friction between the parts. Figure 7 As shown, the transmission gear 810 is formed with blades 811 for generating airflow toward the substrate 210. Specifically, the outer circumferential profile of the lower section of the transmission shaft 300 is non-cylindrical, including two opposing flat surfaces 310. The transmission gear 810 includes a coaxial inner connecting ring 812 and an outer gear ring 813. The center hole 8121 of the inner connecting ring 812 is a nearly waist-shaped hole that matches the shape of the lower half of the transmission shaft 300. The lower section of the transmission shaft 300 is inserted into the center hole of the inner connecting ring, preventing the two from rotating relative to each other. The blades 811 are connected between the inner connecting ring and the outer gear 813, and the transmission gear 810 is fixed to the transmission shaft 300 via a shaft circlip (not shown).

[0081] Of course, in other embodiments, if the transmission mechanism is not provided (ie, the transmission gear does not exist), then, fan blades may be directly provided on the transmission shaft to follow the transmission shaft to generate wind.

[0082] As attached Figure 3 , Attachment Figure 4 As shown, to facilitate cooling of components above the base plate 210 by airflow, a vent hole 214 is formed on the base plate 210, positioned opposite the transmission gear 810. The vent hole 214 is an arc-shaped hole, with a width W1 at the end facing the transmission gear being greater than a width W2 at the end facing away from the transmission gear. This facilitates the formation of a cyclone in the airflow generated by the blades 811, thereby achieving a more effective cooling effect. Correspondingly, air holes (not shown) are formed on the housing 100 to release heat from within the housing to the exterior of the housing 100 through airflow. The air holes also serve as channels for airflow into the housing.

[0083] In a conventional structure, the transmission shaft 300 is connected to the propulsion shaft 400 via a crank, and the transmission shaft 300 and the propulsion shaft 400 are arranged at both ends of the crank. The crank-connecting rod structure they constitute has the problem of dead points in conventional crank-connecting rod structures. Figure 8As shown, the connector 500 connecting the transmission shaft 300 to the driving shaft 400 includes a socket 510 coaxial with the transmission shaft 300, a semicircular body 520 located on opposite sides of the socket 510, and a connector 530. The connector 530 is formed with a driving shaft connection hole 531, and the length L and width W of the connector 530 do not exceed the radius r of the semicircular body. Because the semicircular body 520 is heavier than the connector, the inertia and centrifugal force on the semicircular body side during rotation can largely avoid the influence of the dead point position of a conventional crank-connecting rod mechanism, ensuring the stability of the piston drive. The driving shaft 500 is pivotally connected to the piston 600 via a bearing 510 coaxially connected thereto.

[0084] The specific structure of the piston 600 and the cylinder body 220 can adopt the structure of the cylinder body and piston in various existing air pumps, such as the piston disclosed in application number 201810848256.6. Their structure is not the innovation of this solution and will not be described in detail here.

[0085] As attached Figure 1 , Attachment Figure 2 As shown, the outlet head 700 is used to discharge the compressed gas in the cylinder body. It is connected to the outlet end of the cylinder body via bolts and is coaxial with the outlet port 221 of the cylinder body 220. Typically, to facilitate access to external pipelines, a gap is maintained between the external connector 710 of the outlet head 700 and the hole wall of the outlet 110 of the housing. In this case, the outlet head 700 is only connected to the cylinder body 220. As a result, the entire support member 200 is supported only at the connection portion 230, while the cylinder body 220 end is unsupported. During operation, the positioning accuracy of the cylinder body will be affected to a certain extent, which can easily cause abnormal wear of the seal on the piston.

[0086] To better support one end of the cylinder body of the support member 200, the gas outlet head 700 can be connected to the inner wall of the housing 100, but this will increase the complexity of the structure of the housing and the gas outlet head 700. Alternatively, the outer joint 710 of the gas outlet head 700 can be extended to the outside of the housing 100, and the outer wall of the main air pipe of the gas outlet head 700 can be abutted against the inner wall of the outlet of the housing 100.

[0087] As attached Figure 1 , Attachment Figure 2 As shown, a better way is to make the air outlet head 700 detachably connected to the air outlet pipe 1000 and fixedly connected to the outer shell 100 through the air outlet pipe 1000, and the outer diameter of the connecting part 1100 of the air outlet pipe 100 and the air outlet head 700 is equivalent to the inner diameter of the outlet 110 of the outer shell 100, so that the air outlet pipe 1000 can effectively provide support for the air outlet head 700, and then provide support for the support member.

[0088] As attached Figure 2 As shown, the air outlet pipe 1000 includes a first pipe 1200, a second pipe 1300 and a pressure gauge 1400 connecting them, and the end of the second pipe 1300 is detachably connected to an inflation head 1500. The inflation head 1500 can adopt various known inflation head structures, which will not be described here.

[0089] Example 2

[0090] This solution further discloses an air pump, as shown in the attached Figure 9 As shown, it includes the inflation pump head 10 of the above embodiment and also includes a driving host 20, and the two can be quickly connected for assembly and disassembly.

[0091] As attached Figure 10 , Attachment Figure 11 As shown, the drive unit 22 includes a housing 222, which provides installation space and the grip required for manual operation. The shape of the housing 222 can be modeled after the shapes of various existing handheld tools, such as the connector of a gun-type electric drill or a pen-type electric drill. Taking a gun-type electric drill as an example, the housing 222 can be composed of two symmetrical halves (only the left half is shown in the figure), forming a structure with an internal cavity and a socket at one end. The housing 222 includes a grip portion for manual gripping and a mounting portion, which defines a substantially circular internal cavity. The front end of the mounting portion forms the socket 2221. When the air pump head is assembled with the drive unit 22, the connector is inserted through the socket 2221.

[0092] As attached Figure 10 , Attachment Figure 11 As shown, the motor 221 is arranged in the main housing 222, and the rotating shaft of the motor 221 is facing the socket 2221 and is coaxial with the socket 2221. The main housing 222 is also provided with a control panel, a battery and other structures possessed by conventional power tools. The main housing 222 is also provided with a start button, a steering switch key and other structures possessed by conventional power tools. This is a known technology and will not be elaborated on.

[0093] As attached Figure 10As shown, when the driving host 22 needs to be connected to the air pump head 10, at least one handpiece locking block 223 in the main housing 222 can be embedded in the card slot of the air pump head. At this time, the handpiece locking block 223 blocks the movement of the boss on the air pump head, thereby restricting the air pump head from being removed from the main housing 222. When the connector needs to be disassembled from the driving host, the handpiece locking block 223 is moved out of the card slot of the air pump head to release the restriction of the handpiece locking block 223 on the movement of the air pump head. At this time, the connector air pump head can be pulled out from the main housing 222. The specific process here can refer to the content disclosed in application number 202021068376.3. At the same time, in order to ensure strength, the handpiece locking block 223 is preferably a metal part.

[0094] The structure for driving the head lock block 223 to move in the direction perpendicular to the axis of the socket is as follows: Figure 10 , Attachment Figure 12 As shown, a twist ring 225 and a fixed block 226 are coaxially arranged within the main body housing 222. At least one of the twist ring 225 and the fixed block 226 is a plastic component, and preferably both are plastic components so that they can be injection molded into the desired shape. The axis of the twist ring 225 is coaxial with the axis of the socket of the main body housing 222 and can rotate relative to the main body housing. Under the action of an external force, the twist ring 225 can rotate about its axis relative to the main body housing 222, thereby cooperating with the fixed block 226 to drive the movement of the head locking block 223. The fixed block 226 is fixed within the main body housing.

[0095] As attached Figure 13 As shown, the rotary ring 225 includes a first circular ring 225b and a second circular ring 225c that are coaxial and maintain a gap 225a. They have the same inner diameter, the first circular ring 225b faces outward, and the second circular ring 225c faces inward. They are connected by an operating part 225d located on their edges. There are two operating parts 225d and they are located on opposite sides of the first circular ring. Each operating part 225d has a portion protruding to the outside of the main housing 222, so as to facilitate manual rotation of the rotary ring 225.

[0096] As attached Figure 12 -Attached Figure 14As shown, the outer diameter of the first circular ring 225b is larger than the outer diameter of the second circular ring 225c, and the distance of the gap 225a is equivalent to the thickness of the machine head locking block 223. The machine head locking block 223 is located at the gap 225a. Two protrusions 225e are formed on the circumference of the second circular ring 225c, and a first connecting hole 225f is formed on the protrusion. The portion of the first circular ring located outside the circumference of the second circular ring is formed with a second connecting hole 225g that is directly opposite to each of the first connecting holes 225f. A pin 225h parallel to the axis of the first circular ring is installed at the coaxial first and second connecting holes. The machine head locking block 223 is set on the pin 225h, and the pin 225 passes through the arc-shaped drive hole 223a on the machine head locking block 223. When the pin 225h is located at the first end 223b of the arc-shaped drive hole 223a, the projections of the machine head locking block 223 and the circular hole of the first circular ring 225b on the same projection plane perpendicular to the axis of the first circular ring 225b have overlapping parts; when the pin 225 is located at the second end 223c of the arc-shaped hole 223a, the projections of the machine head locking block 223 and the circular hole of the first circular ring 225b on the same projection plane perpendicular to the axis of the first circular ring 225b have no overlapping parts or only a small amount of overlapping parts and the overlapping parts are not located at the said.

[0097] As attached Figure 12 , Attachment Figure 15 As shown, the fixing block 226 is fixed on the inner side of the twist ring, which includes a plug-in portion 226a and a mounting plate 226b that match the socket portion on the inflation pump head. The outer contour of the plug-in portion 226a matches the inner hole of the socket portion, and the plug-in portion 226a extends into the first ring and the second ring. When the driving host is connected to the inflation pump head, the plug-in portion 226a is inserted into the socket portion of the inflation pump head.

[0098] The mounting plate 226b is fixedly connected to the mainframe housing. Limiting bosses 226c are formed on the mounting plate 226b. These bosses extend from the surface of the mounting plate 226b toward the twist ring, and their number matches the number of the handpiece locking blocks 223. In this embodiment, there are four limiting bosses 226c: two located on the upper side of the mounting plate 226b, which cooperate to limit the vertical movement of one handpiece locking block located between them; and the other two located on the lower side of the mounting plate 226b, which cooperate to limit the vertical movement of the other handpiece locking block located between them.

[0099] As attached Figure 12 , Attachment Figure 13 , Attachment Figure 15 , Attachment Figure 16As shown, a plurality of arcuate grooves 225i are formed on the portion of the first circular ring 225b located outside the circumference of the second circular ring. Each arcuate groove 225i is provided with an energy storage device, preferably a return spring 227. Furthermore, the arcuate grooves 225i include a long groove section and a short groove section, the long groove section being wider than the short groove section. The return spring is located in the long groove section, with both ends of the return spring 227 abutting against the ends of the long groove section. An abutting protrusion 226d is inserted into the short groove section. The abutting protrusion 226d extends from the mounting plate 226b toward the end surface of the twisting ring and into the short groove section. When the twisting ring is twisted under the action of an external force, it cooperates with the abutting protrusion 226d to compress the return spring 227.

[0100] As attached Figure 14 As shown, the return spring 227 normally causes the pin 225h to be located at the first end 223b of the arc-shaped hole 223a. At this time, the air pump head cannot be connected to the driving host. When the air pump head needs to be installed or removed, the twist ring 225 is rotated, and the twist ring 225 drives the pin 225h to rotate. The pin 225h drives the head locking block to move away from the center direction of the plug-in portion 226a. At the same time, the return spring 227 is compressed, and the connector of the air pump head can be inserted into the host housing toward the socket. After the air pump head is inserted, the twist ring 225 is released. The twist ring 225 is reset under the reaction force of the return spring 227, so that the pin on the twist ring drives the head locking block to reset (move toward the center of the plug-in portion) and embed into the slot of the connector. The head locking block blocks the boss 2111 of the connector from exiting, and finally the connector is confined in the host housing.

[0101] As attached Figure 12 , Attachment Figure 13 , Attachment Figure 15 As shown, in order to facilitate assembly, a plurality of arc-shaped through holes 225j are formed on the portion of the first circular ring 225b located on the outer circumference of the second circular ring, and a limiting hook 226e matching each of the arc-shaped through holes 225j is further provided on the mounting plate 226b. The limiting hook 226e is provided on the three limiting bosses 226c. The limiting hook 226e passes through the arc-shaped through hole 225j, and its hook portion is slidably connected to the outer surface of the first circular ring 225b, thereby connecting the twist ring 225 and the fixing block 226 into a whole.

[0102] As attached Figure 12 , Attachment Figure 13 , Attachment Figure 15As shown, a blocking portion 226f is formed on the circumferential surface of the mounting plate 226b, which is opposite to the arc groove 225i and blocks the slot of the arc groove 225i, so that when the torsion ring 225 and the fixing block 226 are connected as a whole, the blocking portion 226f can limit the return spring 227 from withdrawing from the arc groove 225i.

[0103] When the driving main unit 22 is assembled, the twist ring 225 and the fixing block 226 can be connected into a whole first, and then they can be connected as a whole to the half shell of the main unit housing to reduce the difficulty of installation.

[0104] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An air pump head, including a housing, characterized in that: The housing is provided with A support member including a base plate, a cylinder body formed on the base plate, and a connecting portion, wherein the connecting portion is fixed in the housing; a transmission shaft, rotatable and vertically arranged on the base plate, with its axis being perpendicular to the axis of the cylinder body; A driving shaft connected to the transmission shaft via a connecting member, wherein the axis of the driving shaft is parallel to the axis of the transmission shaft and can revolve around the transmission shaft; A piston, telescopically disposed in the cylinder body and having an outer end pivotally connected to the driving shaft; An air outlet head is connected to the front end of the air outlet of the cylinder body and fixed at the outlet of the shell; the transmission shaft is coaxially connected to a transmission gear, the transmission gear is meshed with a gear shaft, the gear shaft is parallel to the transmission shaft and is rotatably arranged on a support sleeve fixed in the shell, the connecting portion and the cylinder body are located on both sides of the base plate, and the connecting portion is screwed to the support sleeve; the transmission gear is formed with a blade for generating an airflow toward the base plate; the shell is formed with an air hole; The gear shaft is coaxial with the transmission shaft, and the gear is connected with the transmission shaft by a toothed connection, and the toothed connection is connected with the toothed connection at the bottom end of the gear. The connecting member includes a socket coaxial with the transmission shaft and a semicircular body and a connecting body located on opposite sides of the socket, the connecting body is formed with a push shaft connecting hole, and the length and width of the connecting body do not exceed the radius of the semicircular body; the push shaft is pivotally connected to the piston through a bearing coaxially connected thereto; the external joint of the air outlet head extends to the outlet of the outer shell, the external joint is detachably connected to the air outlet pipe and is fixedly connected to the outer shell through the air outlet pipe, and the outer diameter of the part of the air outlet pipe connected to the external joint is equivalent to the inner diameter of the outlet of the outer shell; the air outlet pipe includes a first pipe, a second pipe and a pressure gauge connecting them.

2. Air pump, characterized by: The invention comprises the inflation pump head according to claim 1.

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