Brushless motor inflator pump

Abstract

The utility model provides a brushless motor inflator pump which comprises a motor, a cylinder support, a piston rod, a transmission assembly and an inflation connector, the output end of the motor is connected with one end of the transmission assembly, the other end of the transmission assembly is connected with the piston rod, the cylinder support is provided with a cylinder part, one end of the piston rod is provided with a piston head, and the other end of the piston rod is provided with a piston rod. The piston head is sleeved with a piston ring, the air cylinder part is communicated with the inflation connector, the piston head is provided with a first pushing and blocking part and a second pushing and blocking part, a mounting groove is formed between the first pushing and blocking part and the second pushing and blocking part, the piston ring is arranged in the mounting groove in a sliding and sleeved mode, and a vent groove is formed in the mounting groove. A plurality of air outlet holes are formed in one side of the second pushing and blocking part and are communicated with the vent groove. According to the brushless motor inflator pump disclosed by the utility model, the piston ring is sleeved between the first pushing and blocking part and the second pushing and blocking part in the sliding manner, so that the elastic support of the piston ring is increased, the movable deformation quantity of the piston ring is reduced, and the sealing performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inflator pump, concretely relates to a brushless motor inflator pump. BACKGROUND

[0002] The inflator pump is a commonly used inflator equipment, and is widely applied to various occasions, such as automobile inflation, bicycle inflation, swimming ring inflation and outdoor camping, etc. The inflator pump is used to pump air or gas into the corresponding inflatable object, so that the inflatable object is filled with air and reaches the required pressure and volume. The modern inflator pump generally adopts an electric inflator pump, and has the advantages of rapid inflation, convenient carrying and safe use, etc.

[0003] For example, the compact brushless motor bicycle inflator pump core disclosed in Chinese patent 202421415805.8 comprises an integrated support, a brushless motor is arranged on the integrated support, a motor screw is arranged at the connection position of the brushless motor and the integrated support, a cam is connected to the output shaft of the brushless motor, a cam shaft is arranged through the cam, a ball bearing is arranged outside the cam shaft, a connecting rod piston is arranged outside the ball bearing, an E-shaped snap ring is arranged at the connection position of the cam shaft and the ball bearing, and the rotation of the output shaft of the brushless motor can drive the rotation of the cam. The cam drives the connecting rod piston to move through the cam shaft, the other end of the connecting rod piston moves reciprocatingly inside the integrated support, the piston ring can tightly adhere to the inner wall of the integrated support, and the inflation work is guaranteed. However, the piston ring of the inflator pump core is directly sleeved on one end of the connecting rod piston, the end face of the piston ring is limited by the plurality of hooks, when the piston ring reciprocates, the end face of the piston ring directly extrudes the air, the deformation amount of the piston ring is large, the sealing performance of the piston ring and the inner wall of the integrated support is affected, the sealing performance is affected, and the inflation efficiency is reduced. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a brushless motor inflator pump, which has better sealing performance and higher inflation efficiency.

[0005] The technical scheme of the brushless motor inflator pump disclosed by the utility model is as follows:

[0006] The utility model provides a brushless motor inflator pump, including motor, cylinder support, piston rod, transmission assembly and inflator joint, the motor sets up on cylinder support, and the output end of motor is connected with one end of transmission assembly, and the other end of transmission assembly is connected with piston rod, cylinder support is equipped with cylinder part, one end of piston rod is equipped with piston head, and piston head stretches into cylinder part, and piston ring is sleeved on piston head, and cylinder part is linked with inflator joint, and piston head is equipped with first push and second push, and the first push and second push are equipped with mounting groove between, and piston ring is slidably sleeved in mounting groove, and the mounting groove is equipped with air passage, and one side of second push is equipped with a plurality of gas outlet, and gas outlet is linked with air passage.

[0007] As a preferred scheme, one end of the cylinder part is provided with a connecting end, the connecting end is provided with an exhaust hole and a fixing column, a check valve plate is installed on the fixing column, and the check valve plate abuts against the exhaust hole.

[0008] As a preferred scheme, the check valve plate comprises a fixed part and an elastic part, the fixed part is provided with a fixed hole, the check valve plate is fixed to the surface of the connecting end through the fixed hole, and the elastic part is used for releasing the gas of the exhaust hole.

[0009] As a preferred scheme, the connecting end is provided with a circular ring groove, a first sealing ring is arranged in the circular ring groove, and one end of the first sealing ring is attached to the elastic part.

[0010] As a preferred scheme, the transmission assembly comprises a cam, a cam shaft and a bearing, the cam is connected with the output shaft of the motor, the cam shaft is arranged in the cam, the bearing is sleeved on the outer side of the cam shaft, one end of the piston rod is provided with a pivot joint, and the outer side of the bearing is movably connected with the pivot joint.

[0011] As a preferred scheme, one end of the cam shaft is provided with a clamping groove, and a clamping ring is arranged in the clamping groove.

[0012] As a preferred scheme, a plurality of mounting holes are arranged on the cylinder support, corresponding mounting columns are arranged on the inflator joint, and the mounting columns are screwed on the surface of the cylinder support through the mounting holes.

[0013] As a preferred scheme, an embedding groove is arranged in the inner cavity of the inflator joint, a second sealing ring is arranged in the embedding groove, and one end of the second sealing ring abuts against the cylinder support.

[0014] As a preferred scheme, the inside of the cylinder part is a tapered inner cavity.

[0015] As a preferred scheme, the cylinder support is a zinc alloy integrated support, and heat dissipation fins are formed on the outer ring surface of the cylinder support.

[0016] The utility model discloses a brushless motor inflatable pump's beneficial effect is: the output shaft of motor drives cam rotation, and the cam drives piston rod movement through cam shaft, and the piston head of piston rod one end reciprocatingly moves in the inner chamber of cylinder portion, and the both sides of piston ring that is set on the piston head are close to cylinder portion inner side wall, and then the air in the inner chamber of cylinder portion is compressed, and the compressed air promotes check valve piece, makes the compressed air from exhaust hole along inflatable joint and sends out, and check valve piece can prevent gas backflow, makes whole inflation process high efficiency and stable.

[0017] When piston rod moves outward, piston ring moves right and is close to second push portion, and the outside air can flow from the ventilation groove, and along the multiple air outlet holes of second push portion surface flow into cylinder portion, and provide sufficient air source for subsequent inflation operation, when piston rod moves inward, piston ring moves left and is close to first push portion, and piston ring blocks ventilation groove, prevents gas backflow, guarantees inflation leakproofness, and the inflation efficiency is higher, and second push portion and piston ring cooperate and extrude air, can make the deformation of piston ring smaller, reduces the abrasion of piston ring, thereby prolongs the service life of piston ring, and reduces maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the three-dimensional schematic view of the utility model brushless motor inflatable pump.

[0019] Figure 2 It is the explosion schematic view of the utility model brushless motor inflatable pump.

[0020] Figure 3 It is the structure schematic view of piston head and piston ring in the utility model brushless motor inflatable pump.

[0021] Figure 4 It is the cross section schematic view of the utility model brushless motor inflatable pump compressed gas state.

[0022] Figure 5 It is the cross section schematic view of the utility model brushless motor inflatable pump absorption gas state. DETAILED DESCRIPTION

[0023] The utility model will be further described and explained in the combination of specific embodiment and specification annex diagram:

[0024] REFERENCE Figures 1 to 5 A brushless motor 10 inflatable pump, including motor 10, cylinder support 20, piston rod 30, transmission assembly 40 and inflatable joint 50, the motor 10 sets up on cylinder support 20, and the output end of motor 10 is connected with one end of transmission assembly 40, and the other end of transmission assembly 40 is connected with piston rod 30.

[0025] The cylinder support 20 is provided with a cylinder part 21, the inside of the cylinder part 21 is a conical inner cavity, one end of the piston rod 30 is provided with a piston head 31, the piston head 31 extends into the cylinder part 21, the piston head 31 is sleeved with a piston ring 32, the cylinder part 21 is connected with a gas charging connector 50, the piston head 31 is provided with a first push block 311 and a second push block 312, a mounting groove 313 is arranged between the first push block 311 and the second push block 312, the piston ring 32 is slidably sleeved in the mounting groove 313, the mounting groove 313 is provided with a gas passage 314, a plurality of gas outlets 3121 are arranged on one side of the second push block 312, and the gas outlets 3121 are connected with the gas passage 314.

[0026] One end of the cylinder part 21 is provided with a connecting end part 22, the connecting end part 22 is provided with a gas outlet 221 and a fixing column 222, a check valve piece 23 is mounted on the fixing column 222, the check valve piece 23 abuts against the gas outlet 221, the check valve piece 23 comprises a fixing part 231 and an elastic part 232, the fixing part 231 is provided with a fixing hole, the check valve piece 23 is fixed to the surface of the connecting end part 22 through the fixing hole, and the elastic part 232 is used for releasing the gas of the gas outlet 221. The elastic part 232 on the check valve piece 23 can prevent gas backflow, ensure that the gas can only flow in one direction, thereby improving the stability and reliability of gas charging, and avoiding problems such as reduction of gas charging efficiency or damage of equipment caused by backflow of gas during the gas charging process.

[0027] The connecting end part 22 is provided with a circular ring groove 223, the circular ring groove 223 is provided with a first sealing ring 24, and one end of the first sealing ring 24 is attached to the elastic part 232.

[0028] The first sealing ring 24 and the elastic part 232 are in elastic contact, under the action of gas pressure, the first sealing ring 24 can be elastically deformed, when the gas is discharged from the cylinder part 21, the gas pressure acts on the elastic part 232, so that the elastic part 232 is deformed and the gas outlet 221 is opened, and at the same time, the first sealing ring 24 is elastically deformed under the action of the gas pressure, thereby further improving the gas charging efficiency. When the gas pressure decreases, the elastic part 232 returns to the original state, the gas outlet 221 is closed, and at the same time, the elastic restoring force of the first sealing ring 24 makes the first sealing ring 24 closely attached to the elastic part 232, thereby preventing gas backflow, and ensuring the one-way gas guiding performance of the gas charging pump.

[0029] The transmission assembly 40 comprises a cam 41, a cam shaft 42 and a bearing 43, the cam 41 is connected with the output shaft of the motor 10, the cam shaft 42 penetrates the cam 41, the bearing 43 is sleeved on the outer side of the cam shaft 42, one end of the piston rod 30 is provided with a pivot joint part 33, and the outer side of the bearing 43 is movably connected with the pivot joint part 33.

[0030] The transmission assembly of the embodiment drives the piston rod 30 through the cam 41, has high transmission efficiency, can efficiently convert the rotary motion of the motor 10 into the reciprocating motion of the piston rod 30, has stable use and operation, and is suitable for most application scenarios of air pumps.

[0031] In other embodiments, the transmission assembly 40 can be replaced by a gear transmission. Specifically, a pair of intermeshing gears can be adopted, one of which is fixedly connected with the output shaft of the motor 10, and the other of which is connected with the pivot joint 33 of the piston rod 30. Through the gear transmission, the motion speed and stroke of the piston rod 30 can be accurately controlled, and the gear transmission has high torque transmission capacity and long service life.

[0032] In addition, the transmission assembly 40 can also be replaced by a connecting rod mechanism. Specifically, the output shaft of the motor 10 is connected with the piston rod 30 through a crank connecting rod mechanism. The crank connecting rod mechanism can convert the rotary motion of the motor 10 into the linear reciprocating motion of the piston rod 30, has simple structure and low cost, and is suitable for small or low-cost air pump products.

[0033] One end of the camshaft 42 is provided with a clamping groove 421, and a clamping ring 44 is arranged on the clamping groove 421. The clamping ring 44 can limit and fix the camshaft 42, prevent the camshaft 42 from loosening or falling off during movement, and thus ensure the stability and reliability of the transmission assembly 40.

[0034] A plurality of mounting holes are arranged on the cylinder support 20, and corresponding mounting columns are arranged on the air joint 50. The mounting columns are screwed to the surface of the cylinder support 20 through the mounting holes, so that the connection between the cylinder support 20 and the air joint 50 is more firm and reliable, and the air joint 50 is convenient to install and dismount, and also convenient to maintain and replace, thereby improving the maintainability and flexibility of the equipment, and facilitating the user to replace different types of air joints 50 according to needs to adapt to different air filling requirements.

[0035] An embedded groove is arranged in the inner cavity of the air joint 50, and a second sealing ring 25 is arranged in the embedded groove. The second sealing ring 25 abuts against one end of the cylinder support 20. The arrangement of the second sealing ring 25 further enhances the sealing property between the air joint 50 and the cylinder support 20, prevents gas from leaking from the connection between the two during air filling, and ensures the air filling effect.

[0036] The cylinder support 20 adopts a zinc alloy integrated support. The zinc alloy has good mechanical properties and heat conduction properties, can effectively conduct and disperse heat, and the outer ring surface of the cylinder support 20 is formed with heat dissipation fins. The heat dissipation fins can increase the heat dissipation area and improve the heat dissipation efficiency, thereby ensuring the stability of the equipment during long-time operation.

[0037] The working principle of the brushless motor air pump disclosed by the utility model is as follows: as shown in Figures 1-5 The output shaft of motor 10 drives cam 41 to rotate, cam 41 drives piston rod 30 to move through cam shaft 42, piston head 31 at one end of piston rod 30 reciprocates in cylinder part 21, the two sides of piston ring 32 sleeved on piston head 31 are close to the inner wall of cylinder part 21, and then the air in the inner cavity of cylinder part 21 is compressed, compressed air pushes check valve piece 23, so that the compressed air is sent out from exhaust hole 221 along air charging connector 50, and check valve piece 23 can prevent gas backflow, so that the whole air charging process is efficient and stable.

[0038] As shown in Figure 4 And Figure 5 When piston rod 30 moves outward, piston ring 32 moves right and is close to second push part 312, external air can flow in ventilation groove 314 and flow into cylinder part 21 along a plurality of air outlet holes 3121 on the surface of second push part 312, and sufficient air source is provided for subsequent air charging operation; when piston rod 30 moves inward, piston ring 32 moves left and is close to first push part 311, piston ring 32 blocks ventilation groove 314, prevents gas backflow, guarantees air charging sealing performance, and air charging efficiency is higher; and second push part 312 and piston ring 32 cooperate to extrude air, so that the deformation amount of piston ring 32 is smaller, the abrasion of piston ring 32 is reduced, the service life of piston ring 32 is prolonged, and the maintenance cost is reduced.

[0039] Finally, it should be noted that the above examples are used to illustrate the technical solutions of the utility model, and are not limited to the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the utility model.

Claims

1. A brushless motor-driven air pump, comprising a motor, a cylinder bracket, a piston rod, a transmission assembly, and an air inflator, wherein the motor is mounted on the cylinder bracket, the output end of the motor is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to the piston rod, the cylinder bracket has a cylinder section, one end of the piston rod has a piston head, the piston head extends into the cylinder section, the piston head is fitted with a piston ring, and the cylinder section is connected to the air inflator, characterized in that... The piston head is provided with a first push-stop part and a second push-stop part, and an installation groove is provided between the first push-stop part and the second push-stop part. The piston ring is slidably sleeved in the installation groove. A venting groove is provided in the installation groove. A plurality of air outlets are provided on one side of the second push-stop part, and the air outlets are connected to the venting groove.

2. The brushless motor air pump as described in claim 1, characterized in that, One end of the cylinder section is provided with a connecting end, the connecting end is provided with an exhaust port and a fixing post, a check valve plate is installed on the fixing post, and the check valve plate abuts against the exhaust port.

3. The brushless motor air pump as described in claim 2, characterized in that, The check valve plate includes a fixed part and an elastic part. The fixed part is provided with a fixing hole, and the check valve plate is fixed to the surface of the connecting end through the fixing hole. The elastic part is used to release gas from the exhaust hole.

4. The brushless motor air pump as described in claim 3, characterized in that, The connecting end is provided with an annular groove, and a first sealing ring is provided in the annular groove. One end of the first sealing ring is in contact with the elastic part.

5. The brushless motor air pump as described in claim 1, characterized in that, The transmission assembly includes a cam, a camshaft, and a bearing. The cam is connected to the output shaft of the motor. The camshaft passes through the cam. The bearing is sleeved on the outside of the camshaft. One end of the piston rod is provided with a pivot joint. The outside of the bearing is movably connected to the pivot joint.

6. The brushless motor air pump as described in claim 5, characterized in that, One end of the camshaft is provided with a groove, and a retaining ring is provided on the groove.

7. The brushless motor air pump as described in claim 1, characterized in that, The cylinder bracket is provided with multiple mounting holes, and the air inlet is provided with corresponding mounting posts. The mounting posts are screwed to the surface of the cylinder bracket through the mounting holes.

8. The brushless motor air pump as described in claim 1, characterized in that, The inner cavity of the inflation connector is provided with an embedding groove, and a second sealing ring is installed in the embedding groove. The second sealing ring abuts against one end of the cylinder bracket.

9. The brushless motor air pump as described in claim 1, characterized in that, The interior of the cylinder section is a conical cavity.

10. The brushless motor air pump as described in claim 1, characterized in that, The cylinder bracket is a one-piece zinc alloy bracket, and the outer ring surface of the cylinder bracket is formed with heat dissipation fins.

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