Pumping assembly and inflator pump

Abstract

The air pumping assembly comprises a power output device, a transmission mechanism, a piston and an air cylinder body, the transmission mechanism comprises a cam and a connecting rod, the cam is in transmission connection with the power output device, the first end of the connecting rod is hinged to the cam, and at least part of the piston is located in the air cylinder body and is in sliding connection with the air cylinder body; the piston is rotationally connected with the second end of the connecting rod. According to the air pumping assembly, shaking of the piston in the air cylinder body can be reduced, and therefore vibration and noise of the air pumping assembly can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of inflatable pumps, and particularly relates to a pumping assembly and an inflatable pump. Background Art

[0002] With the progress of technology, electric inflatable pumps have been widely used when inflating items such as tires and balloons.

[0003] In related technologies, an electric inflatable pump often includes a motor, a cam, a piston, and a cylinder block. The cam is fixedly connected to the output shaft of the motor. The piston has a plug body and a connecting rod connected to each other, and the plug body and the connecting rod are integrally formed. The plug body is located inside the cylinder block, and the connecting rod is hinged to the cam. Thus, when the output shaft of the motor rotates, the plug body can be driven to reciprocate inside the cylinder block to achieve the suction and exhaust of the cylinder block.

[0004] However, when the cam rotates with the output shaft of the motor, the connecting rod will swing following the rotation of its hinged position with the cam. Since the plug body and the connecting rod are of an integral structure, the plug body will shake inside the cylinder block, resulting in relatively large vibration and noise during the use of the electric inflatable pump. Summary of the Utility Model

[0005] Embodiments of the present disclosure provide a pumping assembly and an inflatable pump, which can solve the above-mentioned technical problems existing in related technologies. The technical solutions are as follows:

[0006] In a first aspect, a pumping assembly is provided. The pumping assembly includes a power output device, a transmission mechanism, a piston, and a cylinder block;

[0007] The transmission mechanism includes a cam and a connecting rod. The cam is in transmission connection with the power output device, and the first end of the connecting rod is hinged to the cam;

[0008] At least a part of the piston is located inside the cylinder block and is slidably connected to the cylinder block. The piston is rotatably connected to the second end of the connecting rod.

[0009] In a possible implementation, the piston includes a plug body and a connecting portion connected to each other. The plug body is located inside the cylinder block, and the connecting portion is rotatably connected to the connecting rod.

[0010] In a possible implementation, the connecting portion includes a first connecting plate, a second connecting plate, and a hinge shaft. The first connecting plate and the second connecting plate are respectively located on both sides of the second end of the connecting rod. The hinge shaft is connected to the first connecting plate and the second connecting plate and is rotatably connected to the second end of the connecting rod.

[0011] In a possible implementation, the transmission mechanism further includes a first bearing, and the articulated shaft is rotatably connected to the second end of the connecting rod through the first bearing; or,

[0012] The transmission mechanism further includes a first bearing bush, and the articulated shaft is rotatably connected to the second end of the connecting rod through the first bearing bush.

[0013] In a possible implementation, a sealing groove is provided on the side wall of the plug body;

[0014] The air pumping assembly further includes a sealing ring, which is fixed in the sealing groove and abuts against the inner wall of the cylinder block.

[0015] In a possible implementation, a first annular groove is provided on the side wall of the sealing ring, and a second annular groove and a third annular groove are respectively provided on two opposite inner side walls of the first annular groove.

[0016] In a possible implementation, in the natural state, the dimension of the part of the sealing ring located on the side away from the connecting rod of the first annular groove in the radial direction is smaller than the dimension of the part of the sealing ring located on the side close to the connecting rod of the first annular groove in the radial direction.

[0017] In a possible implementation, the dimension of the part of the sealing ring located on the side away from the connecting rod of the first annular groove in the axial direction is smaller than the dimension of the part of the sealing ring located on the side close to the connecting rod of the first annular groove in the axial direction.

[0018] In a possible implementation, the part of the sealing ring protruding from the sealing groove on the side away from the connecting rod gradually decreases in thickness from the position away from the inner wall of the cylinder block to the position close to the inner wall of the cylinder block.

[0019] In a possible implementation, a fourth annular groove is provided on the side of the sealing ring close to the connecting rod.

[0020] In a possible implementation, the second annular groove is located on the inner side wall of the first annular groove away from the connecting rod; wherein,

[0021] The distance from the notch to the bottom of the sealing groove on the side away from the connecting rod is smaller than the distance from the groove wall of the second annular groove close to the inner wall of the cylinder block to the bottom of the sealing groove; and / or,

[0022] The distance from the notch to the bottom of the sealing groove on the side close to the connecting rod is greater than or equal to the distance from the groove wall of the third annular groove close to the inner wall of the cylinder block to the bottom of the sealing groove.

[0023] In a possible implementation, the bottom of the first annular groove has a first protrusion, the bottom of the second annular groove has a second protrusion, and the bottom of the third annular groove has a third protrusion. The first protrusion is configured to: when the plug body slides relative to the cylinder block and deforms the sealing ring, abut against the second protrusion and the third protrusion.

[0024] In a second aspect, an air pump is provided, which includes the air pumping assembly described in the first aspect.

[0025] The beneficial effects brought by the technical solutions provided in the present disclosure at least include:

[0026] When the connecting rod drives the piston to slide along the extending direction of the cylinder block, since the piston and the connecting rod are separate structures and are rotatably connected, the force of the connecting rod on the piston in the direction perpendicular to the extending direction of the cylinder block can be reduced. Thus, the situation of the piston shaking in the cylinder block can be reduced, and further, the vibration and noise during the use of the air pumping assembly can be reduced.

[0027] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of an air pumping assembly provided by an embodiment of the present disclosure;

[0030] Figure 2 is a schematic structural diagram of an air pumping assembly provided by an embodiment of the present disclosure;

[0031] Figure 3 is an exploded view of an air pumping assembly provided by an embodiment of the present disclosure;

[0032] Figure 4 is a schematic structural diagram of a piston of an air pumping assembly provided by an embodiment of the present disclosure;

[0033] Figure 5 is a partial schematic structural diagram of a piston of an air pumping assembly provided by an embodiment of the present disclosure.

[0034] Reference numerals:

[0035] 1, power output device; 11, power output part;

[0036] 2. Transmission mechanism; 21. Cam; 22. Connecting rod; 221. First end; 222. Second end; 23. First bearing;

[0037] 3. Piston; 31. Piston body; 311. Sealing groove; 32. Connecting part; 321. First connecting plate; 322. Second connecting plate; 323. Hinge shaft; 33. Check valve; 331. Plugging block; 332. Intermediate rod; 333. Limiting bracket;

[0038] 4. Cylinder block;

[0039] 5. Sealing ring; 51. First annular groove; 511. First protrusion; 52. Second annular groove; 521. Second protrusion; 53. Third annular groove; 531. Third protrusion; 54. Fourth annular groove; 55. Guide surface;

[0040] 6. Mounting frame; 7. Mounting sleeve; 8. Shock pad. Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0042] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments may be combined with each other. The following will describe the present disclosure in detail with reference to the drawings and in combination with the embodiments.

[0043] In the related art, an electric air pump often includes a motor, a cam, a piston, and a cylinder block. The cam is fixedly connected to the output shaft of the motor. The piston has a piston body and a connecting rod connected to each other, and the piston body and the connecting rod are integrated. The piston body is located inside the cylinder block, and the connecting rod is hinged to the cam. Thus, when the output shaft of the motor rotates, the piston body can be driven to reciprocate inside the cylinder block to achieve the air intake and exhaust of the cylinder block.

[0044] However, when the cam rotates with the output shaft of the motor, the connecting rod will swing following the rotation of its hinged position with the cam. Since the piston body and the connecting rod are of an integrated structure, the piston body will shake inside the cylinder block, resulting in relatively large vibration and noise during the use of the electric air pump. Moreover, the piston body will continuously squeeze against the inner wall of the cylinder block, resulting in relatively large resistance to the movement of the piston, and further resulting in relatively large energy loss and heat generation of the electric air pump.

[0045] The embodiments of the present disclosure provide a gas pumping assembly, as shown in Figure 1 and Figure 2As shown in the figure, the pump air assembly includes a power output device 1, a transmission mechanism 2, a piston 3, and a cylinder block 4. The transmission mechanism 2 includes a cam 21 and a connecting rod 22. The cam 21 is in transmission connection with the power output device 1. The first end 221 of the connecting rod 22 is hinged to the cam 21. At least a part of the piston 3 is located inside the cylinder block 4 and is slidably connected to the cylinder block 4. The piston 3 is rotatably connected to the second end 222 of the connecting rod 22.

[0046] In this way, when the connecting rod 22 drives the piston 3 to slide along the extension direction of the cylinder block 4, since the piston 3 and the connecting rod 22 are separate structures and are rotatably connected, the force of the connecting rod 22 on the piston 3 in the direction perpendicular to the extension direction of the cylinder block 4 can be reduced. Thus, the situation of the piston 3 shaking inside the cylinder block 4 can be reduced, and further, the vibration and noise during the use of the pump air assembly can be reduced. Moreover, the situation where the piston 3 continuously presses against the inner wall of the cylinder block 4 can be avoided, so that the resistance of the piston 3 during movement can be reduced, and further, the energy loss and heat generation of the pump air assembly can be reduced.

[0047] Among them, the power output device 1 can be a motor. The power output part 11 of the power output device 1 is the output shaft of the motor. The cam 21 is fixedly connected to the output shaft of the motor. The main body part of the cylinder block 4 is cylindrical, with one end open and one end closed. The piston 3 enters the cylinder block 4 at the open end. And, the closed end of the cylinder block 4 has an air outlet, which is communicated with the cavity to be inflated, so as to inflate the cavity to be inflated when the piston 3 moves close to the closed end.

[0048] Optionally, as Figure 3 shown, the pump air assembly further includes a mounting bracket 6. The power output device 1 and the cylinder block 4 are both fixed to the mounting bracket 6. Among them, the cylinder block 4 and the mounting bracket 6 are integrally formed. Specifically, both the cylinder block 4 and the mounting bracket 6 are made of metal materials and are integrally cast, thereby reducing the vibration of the pump air assembly and improving the structural strength of the pump air assembly. The pump air assembly further includes a mounting sleeve 7. The mounting sleeve 7 is sleeved on at least a part of the power output device 1. The mounting sleeve 7 is installed on the mounting bracket 6 through bolts to realize the connection between the power output device 1 and the mounting bracket 6. In addition, the mounting sleeve 7 and the power output device 1 can be integrally formed to improve the structural strength of the pump air assembly.

[0049] In an implementation manner of the embodiment of the present disclosure, as Figure 3 shown, the piston 3 includes a plug body 31 and a connecting portion 32 connected to each other. The plug body 31 is located inside the cylinder block 4, and the connecting portion 32 is rotatably connected to the connecting rod 22.

[0050] In this way, the connection between the piston 3 and the connecting rod 22 can be conveniently realized.

[0051] Optionally, the plug body 31 and the connecting portion 32 are integrally formed.

[0052] In a possible implementation, Figure 2 and Figure 3 As shown, the plug body 31 is provided with an air intake hole, and the piston 3 also includes a one-way valve 33, which is used to block or open the air intake hole. Specifically, the one-way valve 33 includes a blocking block 331, an intermediate rod 332 and a limiting bracket 333 connected in sequence, the intermediate rod 332 is inserted into the air intake hole, the blocking block 331 is located on the side of the intermediate rod 332 away from the connecting rod 22, and the limiting bracket 333 is located on the side of the intermediate rod 332 close to the connecting rod 22. Among them, the blocking block 331 is truncated cone-shaped, and its end face where the large diameter is located faces the inside of the cylinder body 4, and the small diameter end faces the outside of the cylinder body 4, and at least part of the blocking block 331 is located in the air intake hole. The intermediate rod 332 is coaxial with the blocking block 331.

[0053] In this way, in the process of the plug body 31 moving in the direction close to the connecting rod 22, the air pressure of the external air will press the blocking block 331 to move in the direction away from the connecting rod 22 until the limit bracket 333 abuts against the edge of the air intake hole, so that the blocking block 331 avoids the air intake hole, thereby opening the air intake hole; in the process of the plug body 31 moving in the direction away from the connecting rod 22, the air inside the cylinder body 4 will be compressed, which will push the blocking block 331, causing the blocking block 331 to move in the direction close to the connecting rod 22, so that the blocking block 331 blocks the air intake hole, thereby closing the air intake hole. In this process, the busbar of the blocking block 331 can guide the movement of the blocking block 331, ensuring that the blocking block 331 can be stably stuck in the air intake hole.

[0054] In a possible implementation manner, the connecting portion 32 is hinged to the second end 222 of the connecting rod 22 .

[0055] In a possible implementation manner, a spherical pair is formed between the connecting portion 32 and the second end 222 of the connecting rod 22 .

[0056] In one implementation of the present disclosure, Figure 3 As shown, the connecting portion 32 includes a first connecting plate 321, a second connecting plate 322 and a hinge shaft 323. The first connecting plate 321 and the second connecting plate 322 are respectively located on both sides of the second end 222 of the connecting rod 22. The hinge shaft 323 is connected to the first connecting plate 321 and the second connecting plate 322, and is rotatably connected to the second end 222 of the connecting rod 22.

[0057] In this way, by arranging the second end 222 of the connecting rod 22 between the first connecting plate 321 and the second connecting plate 322, the first connecting plate 321 and the second connecting plate 322 are driven to rotate simultaneously by the connecting rod 22, which can prevent the positions of the second end 222 of the connecting rod 22 and the connecting portion 32 from shifting, thereby improving the stability of the movement of the connecting rod 22.

[0058] Optionally, the first connecting plate 321 has a first connecting through-hole, the second connecting plate 322 has a second connecting through-hole, the second end 222 of the connecting rod 22 has a third connecting through-hole, the first connecting through-hole, the second connecting through-hole and the third connecting through-hole are aligned with each other, and the hinge shaft 323 is inserted through the first connecting through-hole, the second connecting through-hole and the third connecting through-hole.

[0059] Furthermore, one end of the hinge shaft 323 has a limiting portion protruding from the outer edge of the shaft body, and this limiting portion abuts against the surface of the first connecting plate 321 away from the second connecting plate 322. The outer edge of a part of the hinge shaft 323 near the other end has an external thread, and the second connecting through-hole has an internal thread adapted to this external thread, and this external thread and this internal thread are threadedly engaged with each other to fix the hinge shaft 323 between the first connecting plate 321 and the second connecting plate 322.

[0060] Optionally, as Figure 2 and Figure 3 shown, the limiting bracket 333 on the one-way valve 33 has a plurality of limiting feet, and two of the limiting feet are lapped on the first connecting plate 321. When the one-way valve 33 moves, the two limiting feet move along the first connecting plate 321.

[0061] In an implementation manner of the embodiment of the present disclosure, as Figure 3 shown, the transmission mechanism 2 further includes a first bearing 23, and the hinge shaft 323 is rotatably connected to the second end 222 of the connecting rod 22 through the first bearing 23.

[0062] In this way, the friction between the second end 222 of the connecting rod 22 and the hinge shaft 323 can be reduced, thereby reducing the wear of the hinge shaft 323 and the connecting rod 22, ensuring the stability of the relative rotation of the connecting rod 22, and improving the service life of the air pumping assembly.

[0063] Wherein, the first bearing 23 has an outer ring and an inner ring, the outer ring of the first bearing 23 is connected to the third connecting through-hole, and the inner ring is rotatably connected to the hinge shaft 323.

[0064] In an implementation manner of the embodiment of the present disclosure, the transmission mechanism 2 further includes a first bearing bush, and the hinge shaft 323 is rotatably connected to the second end 222 of the connecting rod 22 through the first bearing bush.

[0065] In this way, it is possible to reduce the friction between the second end 222 of the connecting rod 22 and the hinge shaft 323, thereby reducing the wear of the hinge shaft 323 and the connecting rod 22, ensuring the stability of the relative rotation of the connecting rod 22, and improving the service life of the air pumping assembly.

[0066] In a possible implementation manner, the first connecting plate 321 has a first connection hole, the second connecting plate 322 has a second connection hole, one side of the second end 222 of the connecting rod 22 close to the first connecting plate 321 has a first rotating protrusion, the first rotating protrusion is rotatably connected to the first connection hole, one side of the second end 222 of the connecting rod 22 close to the second connecting plate 322 has a second rotating protrusion, and the second rotating protrusion is rotatably connected to the second connection hole.

[0067] Optionally, the transmission mechanism 2 further includes two second bearings. The outer rings of the two second bearings are respectively connected to the first connection hole and the second connection hole, and the inner rings of the two second bearings are respectively rotatably connected to the first rotating protrusion and the second rotating protrusion.

[0068] Optionally, the transmission mechanism 2 further includes two second bearing bushes. The outer rings of the two second bearing bushes are respectively connected to the first connection hole and the second connection hole, and the inner rings of the two second bearing bushes are respectively rotatably connected to the first rotating protrusion and the second rotating protrusion.

[0069] In an implementation manner of the embodiment of the present disclosure, as Figure 5 shown, the side wall of the plug body 31 has a sealing groove 311. The air pumping assembly further includes a sealing ring 5. The sealing ring 5 is fixed in the sealing groove 311 and is in contact with the inner wall of the cylinder block 4.

[0070] In this way, the airtightness between the piston 3 and the inner wall of the cylinder block 4 can be improved, so as to ensure that when the piston 3 compresses the gas in the cylinder block 4, the gas in the cylinder block 4 can be pumped into the cavity to be inflated.

[0071] Optionally, the sealing ring 5 can be made of rubber material.

[0072] In an implementation manner of the embodiment of the present disclosure, the side wall of the sealing ring 5 has a first annular groove 51, and the opposite two inner side walls of the first annular groove 51 respectively have a second annular groove 52 and a third annular groove 53.

[0073] When the plug body 31 slides relative to the cylinder block 4, the sealing ring 5 will deform. By providing the first annular groove 51 on the side wall of the sealing ring 5 and respectively providing the second annular groove 52 and the third annular groove 53 on the two inner side walls of the first annular groove 51, it is possible to make the sealing ring 5 more easily deform, thereby reducing the friction between the sealing ring 5 and the cylinder block 4, and further reducing the energy loss and heat generation of the air pumping assembly.

[0074] Among them, asFigure 4 and Figure 5 As shown in Figure 5 , the second annular groove 52 is located on the side of the first annular groove 51 away from the connecting rod 22, and the third annular groove 53 is located on the side of the first annular groove 51 close to the connecting rod 22. In this way, during the exhaust process of the cylinder block 4, that is, during the process in which the plug body 31 moves away from the connecting rod 22, a relatively large deformation occurs on the side of the sealing ring 5 close to the side moving away, so that the resistance to the movement of the plug body 31 can be reduced, while the deformation on the side of the sealing ring 5 close to the connecting rod 22 is relatively small, thereby ensuring the sealing effect of the sealing ring 5; during the intake process of the cylinder block 4, that is, during the process in which the plug body 31 moves towards the connecting rod 22, the side of the sealing ring 5 close to the connecting rod 22 deforms greatly, thereby reducing the resistance to the movement of the plug body 31. That is, during the exhaust process, the sealing effect of the sealing ring 5 is mainly achieved through the part of the sealing ring 5 located on the side of the first annular groove 51 close to the connecting rod 22. During the intake process of the cylinder block 4, it is not necessary to ensure the sealing effect of the sealing ring 5, so that the part of the sealing ring 5 located on the side of the first annular groove 51 close to the connecting rod 22 can be deformed to reduce the resistance to the movement of the piston.

[0075] In an implementation manner of the embodiment of the present disclosure, in the natural state, the dimension of the part of the sealing ring 5 located on the side of the first annular groove 51 away from the connecting rod 22 in the radial direction is smaller than the dimension of the part of the sealing ring 5 located on the side of the first annular groove 51 close to the connecting rod 22 in the radial direction.

[0076] Herein, the "natural state" refers to the state of the sealing ring 5 when it is not installed.

[0077] In this way, when the sealing ring 5 is located in the cylinder block 4, a certain amount of compression can be provided between the part of the sealing ring 5 located on the side of the first annular groove 51 close to the connecting rod 22 and the inner wall of the cylinder block 4, that is, this part is squeezed against the inner wall of the cylinder block 4, thereby ensuring the sealing effect of the sealing ring 5. Moreover, the thickness of the part of the sealing ring 5 located on the side of the first annular groove 51 away from the connecting rod 22 is smaller, which enables this part to be more easily deformed, thereby reducing the resistance when the sealing ring 5 slides in the cylinder block 4, and further reducing the energy loss and heat generation during the use of the pumping component.

[0078] In an implementation manner of the embodiment of the present disclosure, the dimension of the part of the sealing ring 5 located on the side of the first annular groove 51 away from the connecting rod 22 in the axial direction is smaller than the dimension of the part of the sealing ring 5 located on the side of the first annular groove 51 close to the connecting rod 22 in the axial direction.

[0079] In this way, the structural strength of the part of the sealing ring 5 located on the side of the first annular groove 51 close to the connecting rod 22 can be ensured, preventing the occurrence of a fracture of this part due to insufficient structural strength during the process of following the piston 3, thereby improving the service life of the sealing ring 5.

[0080] In an implementation of the embodiments of the present disclosure, for the part of the sealing ring 5 protruding from the sealing groove 311 on the side away from the connecting rod 22, the thickness gradually decreases from the position away from the inner wall of the cylinder block 4 towards the position close to the inner wall of the cylinder block 4.

[0081] Wherein, "the thickness gradually decreases from the position away from the inner wall of the cylinder block 4 towards the position close to the inner wall of the cylinder block 4" means that: from the position away from the inner wall of the cylinder block 4 towards the position close to the inner wall of the cylinder block 4, the axial dimension of the sealing ring 5 gradually decreases.

[0082] In this way, during the exhaust process of the cylinder block 4, under the action of the internal air pressure in the cylinder block 4, the part of the sealing ring 5 protruding from the sealing groove 311 on the side away from the connecting rod 22 can be squeezed towards the side where the connecting rod 22 is located. And, since the axial dimension of this part gradually decreases from the position away from the inner wall of the cylinder block 4 towards the position close to the inner wall of the cylinder block 4 to form an inclined guiding surface 55, it can guide the movement of the plug body 31 in the direction away from the connecting rod 22.

[0083] In an implementation of the embodiments of the present disclosure, the side of the sealing ring 5 close to the connecting rod 22 has a fourth annular groove 54.

[0084] In this way, the thickness of the side of the sealing ring 5 close to the connecting rod 22 can be reduced. During the intake process of the cylinder block 4, the deformation of the sealing ring 5 on this side can be more conveniently realized, so as to reduce the pressure between the side of the sealing ring 5 close to the connecting rod 22 and the inner wall of the cylinder block 4 during the intake process, and further reduce the resistance of the piston 3 to move.

[0085] Optionally, the fourth annular groove 54 and the third annular groove 53 are located on the opposite sides of the part of the sealing ring 5 in the sealing groove 311 on the side close to the connecting rod 22, so as to reduce the thickness of this part of the sealing ring 5, thereby facilitating the deformation of the sealing ring 5 during the intake process of the cylinder.

[0086] In an implementation of the embodiments of the present disclosure, the distance from the notch to the bottom of the sealing groove 311 on the side away from the connecting rod 22 is less than the distance from the groove wall of the second annular groove 52 close to the inner wall of the cylinder block 4 to the bottom of the sealing groove 311.

[0087] In this way, in the part of the sealing ring 5 located on the side of the sealing groove 311 away from the connecting rod 22, at least part of the second annular groove 52 protrudes from the end close to the inner wall of the cylinder block 4 of the part of the sealing groove 311 away from the connecting rod 22, so as to reduce the difficulty of deformation of at least this part during the intake process, and facilitate reducing the resistance of the plug body 31 to slide.

[0088] In addition, the portion of the sealing ring 5 protruding from the sealing groove 311 on the side away from the connecting rod 22 has a guide surface 55 with a gradually decreasing axial dimension from a position away from the inner wall of the cylinder block 4 to a position close to the inner wall of the cylinder block 4. During the intake process of the cylinder block 4, due to the presence of this guide surface 55, when this portion deforms towards the side away from the connecting rod 22, the end of the portion offset towards the side away from the connecting rod 22 does not contact the inner wall of the cylinder block 4. That is, the deformation of this portion can be guided through the guide surface 55, so that deformation can occur more conveniently.

[0089] In an embodiment of the present disclosure, the distance from the notch to the bottom of the sealing groove 311 on the side close to the connecting rod 22 is greater than or equal to the distance from the groove wall of the third annular groove 53 close to the inner wall of the cylinder block 4 to the bottom of the sealing groove 311.

[0090] In this way, in the portion of the sealing ring 5 located on the side of the sealing groove 311 close to the connecting rod 22, the end of the portion of the sealing groove 311 on the side close to the connecting rod 22 near the inner wall of the cylinder block 4 protrudes from the whole of the second annular groove 52, so that the portion of the sealing ring 5 located on the side of the sealing groove 311 close to the connecting rod 22 can be supported during the exhaust process, preventing excessive deformation of this portion to ensure the sealing effect of this portion.

[0091] In an embodiment of the present disclosure, the bottom of the first annular groove 51 has a first protrusion 511, the bottom of the second annular groove 52 has a second protrusion 521, and the bottom of the third annular groove 53 has a third protrusion 531. The first protrusion 511 is used for: when the plug body 31 slides relative to the cylinder block 4 and causes the sealing ring 5 to deform, abutting against the second protrusion 521 and the third protrusion 531.

[0092] In this way, by providing the first protrusion 511, the second protrusion 521, and the third protrusion 531, when the two side walls of the first annular groove 51 deform, the first protrusion 511 can support the second protrusion 521 and the third protrusion 531, thereby preventing the situation where the deformation of the two side walls of the first annular groove 51 is too large and the sealing ring 5 loses its sealing function. That is, with such a setting, the sealing effect of the sealing ring 5 can be ensured while reducing the energy loss and heat generation of the pumping component.

[0093] Optionally, the maximum distance from the first protrusion 511 to the bottom of the first annular groove 51 is greater than the minimum distance from the second protrusion 521 and the second protrusion 521 to the bottom of the first annular groove 51. The distance from the groove wall of the fourth annular groove 54 close to the inner wall of the cylinder block 4 to the bottom of the sealing groove 311 in the radial direction of the sealing ring 5 is less than the distance from the side of the third protrusion 531 away from the inner wall of the cylinder block 4 to the bottom of the sealing groove 311 in the radial direction of the sealing ring 5.

[0094] An embodiment of the present disclosure also provides an air pump, which includes the air pumping assembly mentioned above.

[0095] The air pump further includes a housing. The mounting bracket 6 is located inside the housing. As Figure 3 shown, a plurality of shock pads 8 are provided between the mounting bracket 6 and the housing, so as to further reduce the vibration of the air pumping assembly and reduce the noise generated during the use of the air pump.

[0096] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0097] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0098] In the description of the present disclosure, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings. These orientation words are only for the convenience of describing the present disclosure and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the protection scope of the present disclosure; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0099] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0100] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the scope of protection of the present disclosure.

[0101] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure may have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A pump air component, characterized in that, The pump air component includes a power output device (1), a transmission mechanism (2), a piston (3), and a cylinder block (4); The transmission mechanism (2) includes a cam (21) and a connecting rod (22). The cam (21) is in transmission connection with the power output device (1), and the first end (221) of the connecting rod (22) is hinged to the cam (21); At least part of the piston (3) is located inside the cylinder block (4) and is slidably connected to the cylinder block (4). The piston (3) is rotatably connected to the second end (222) of the connecting rod (22).

2. The pump air component according to claim 1, wherein The piston (3) includes a plug body (31) and a connecting portion (32) connected to each other. The plug body (31) is located inside the cylinder block (4), and the connecting portion (32) is rotatably connected to the connecting rod (22).

3. The pump air component according to claim 2, wherein The connecting portion (32) includes a first connecting plate (321), a second connecting plate (322), and a hinge shaft (323). The first connecting plate (321) and the second connecting plate (322) are respectively located on both sides of the second end (222) of the connecting rod (22). The hinge shaft (323) is connected to the first connecting plate (321) and the second connecting plate (322), and is rotatably connected to the second end (222) of the connecting rod (22).

4. The pump air component according to claim 3, wherein The transmission mechanism (2) further includes a first bearing (23), and the hinge shaft (323) is rotatably connected to the second end (222) of the connecting rod (22) through the first bearing (23); or, The transmission mechanism (2) further includes a first bearing bush, and the hinge shaft (323) is rotatably connected to the second end (222) of the connecting rod (22) through the first bearing bush.

5. The pump air component according to claim 2, wherein A sealing groove (311) is provided on the side wall of the plug body (31); The pump air component further includes a sealing ring (5). The sealing ring (5) is fixed in the sealing groove (311) and is in contact with the inner wall of the cylinder block (4).

6. The pump air component according to claim 5, wherein A first annular groove (51) is provided on the side wall of the sealing ring (5), and second annular grooves (52) and third annular grooves (53) are respectively provided on two opposite inner side walls of the first annular groove (51).

7. The pump air component according to claim 6, wherein In the natural state, the dimension of the part of the sealing ring (5) located on the side away from the connecting rod (22) of the first annular groove (51) in the radial direction is smaller than the dimension of the part of the sealing ring (5) located on the side close to the connecting rod (22) of the first annular groove (51) in the radial direction.

8. The pump air component according to claim 7, wherein The dimension in the axial direction of the part of the sealing ring (5) located on the side of the first annular groove (51) away from the connecting rod (22) is smaller than the dimension in the axial direction of the part of the sealing ring (5) located on the side of the first annular groove (51) close to the connecting rod (22).

9. The air pumping assembly according to claim 6, wherein The part of the sealing ring (5) protruding from the sealing groove (311) on the side away from the connecting rod (22) has a gradually decreasing thickness from the position away from the inner wall of the cylinder block (4) to the position close to the inner wall of the cylinder block (4).

10. The air pumping assembly according to claim 6, wherein The side of the sealing ring (5) close to the connecting rod (22) has a fourth annular groove (55).

11. The air pumping assembly according to claim 6, wherein The second annular groove (52) is located on the inner side wall of the first annular groove (51) away from the connecting rod (22); wherein, The distance from the notch to the bottom of the sealing groove (311) on the side away from the connecting rod (22) is smaller than the distance from the groove wall of the second annular groove (52) close to the inner wall of the cylinder block (4) to the bottom of the sealing groove (311); and / or, The distance from the notch to the bottom of the sealing groove (311) on the side close to the connecting rod (22) is greater than or equal to the distance from the groove wall of the third annular groove (53) close to the inner wall of the cylinder block (4) to the bottom of the sealing groove (311).

12. The air pumping assembly according to claim 6, wherein The bottom of the first annular groove (51) has a first protrusion (511), the bottom of the second annular groove (52) has a second protrusion (521), the bottom of the third annular groove (53) has a third protrusion (531), and the first protrusion (511) is used for: when the plug body (31) slides relative to the cylinder block (4) to cause the sealing ring (5) to deform, abutting against the second protrusion (521) and the third protrusion (531).

13. An air pump, characterized in that, The inflator includes the air pumping assembly according to any one of claims 1-12.

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