Air pump

Abstract

The present disclosure provides an air pump, comprising a cylinder assembly, a power assembly, a power transmission assembly and a noise reduction structure; the cylinder assembly is connected to the power assembly through the power transmission assembly, and the noise reduction structure is installed on the cylinder assembly or the power assembly and at least covers the power transmission assembly. The noise level of the air pump is low in a working state.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air pumps, and in particular to an air pump. Background Art

[0002] An air pump is a device used to quickly inflate tires, etc. The air pump can efficiently compress air with the help of electricity and introduce the air into the tire.

[0003] When the air pump compresses air, the internal mechanical parts move rapidly, which may produce loud noise. Utility Model Content

[0004] In view of this, the present disclosure provides an air pump which produces less noise when in operation.

[0005] Specifically, the following technical solutions are included:

[0006] An air pump comprises a cylinder assembly, a power assembly, a power transmission assembly and a noise reduction structure;

[0007] The cylinder assembly is connected to the power assembly via the power transmission assembly, and the noise reduction structure is installed on the cylinder assembly or the power assembly and at least covers the power transmission assembly.

[0008] Optionally, the noise reduction structure has an air inlet, which is connected to the cylinder assembly.

[0009] Optionally, the noise reduction structure includes a first mounting structure, the cylinder assembly or the power assembly includes a second mounting structure, and the noise reduction structure is mounted on the cylinder assembly or the power assembly through the cooperation of the first mounting structure and the second mounting structure.

[0010] Optionally, one of the first mounting structure and the second mounting structure is a slot, and the other is a hook; or, one of the first mounting structure and the second mounting structure is at least one of a mounting hole or a mounting slot, and the other is at least one of a shaft, a pin or a screw.

[0011] Optionally, the cylinder assembly includes a cylinder bracket, the cylinder bracket is fixedly connected to the power assembly, the second mounting structure is arranged on the cylinder bracket, and the noise reduction structure is mounted on the cylinder bracket.

[0012] Optionally, the material of the noise reduction structure includes at least one of plastic, sound-absorbing cotton, and rubber.

[0013] Optionally, the power assembly includes a motor and a planetary gearbox, and the motor is configured to drive the planetary gearbox to move;

[0014] The power transmission assembly includes a connecting rod, a cam and a first transmission shaft, the cam is fixedly connected to the gear box output shaft of the planetary gear box, the planetary gear box drives the cam to rotate, and one end of the connecting rod and the cam are both rotatably connected to the first transmission shaft;

[0015] The cylinder assembly comprises a piston and a cylinder, the piston is located in the cylinder, and the other end of the connecting rod is fixedly connected to the piston.

[0016] Optionally, the planetary gearbox includes a sun gear, planetary gears, a planetary gear shaft, a planet carrier and the gearbox output shaft;

[0017] The sun gear is connected to the motor and rotates when driven by the motor;

[0018] The planetary gear is located at the periphery of the sun gear and meshes with the sun gear, the planetary gear is sleeved on the planetary gear shaft, and the planetary gear shaft is installed on the planet carrier;

[0019] The gearbox output shaft is fixedly connected to the planet carrier and rotates under the drive of the planet carrier.

[0020] Optionally, the number of the planetary gears is three or more, and they are evenly distributed around the sun gear.

[0021] Optionally, the power assembly further includes a bearing, and the bearing is sleeved outside the gearbox output shaft.

[0022] Optionally, the planet carrier has a bar-shaped mounting position, and one end of the gear box output shaft is embedded in the bar-shaped mounting position.

[0023] Optionally, the planetary gearbox further comprises a base plate and / or a ring gear;

[0024] The base plate is mounted on the bottom of the planetary gear box and is fixedly connected to the motor;

[0025] The gear ring is sleeved on the periphery of the planetary gear and is fixedly connected to the base plate.

[0026] Optionally, the side wall of the cam has a first through hole, the power transmission assembly further includes a locking piece, the side wall of the gearbox output shaft has a second fixing hole, and the locking piece is tightened in the second fixing hole through the first through hole.

[0027] The disclosed embodiment provides an air pump, in which a cylinder assembly is connected to a power assembly by means of a power transmission assembly, so that the power of the power assembly can be transmitted to the cylinder assembly, and air can be efficiently compressed in the cylinder assembly. The air pump also has a noise reduction structure, which at least covers the power transmission assembly, so that the mechanical noise generated at the power transmission assembly does not overflow, thereby reducing the noise during the operation of the air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A partial structural schematic diagram of an air pump provided in an embodiment of the present disclosure;

[0030] Figure 2 for Figure 1 A partial exploded schematic diagram of the structure shown;

[0031] Figure 3 for Figure 2 A schematic diagram of the structure shown in another viewing angle;

[0032] Figure 4 for Figure 1 a schematic diagram of the exploded structure of the structure shown;

[0033] Figure 5 for Figure 1 Another partial exploded schematic diagram of the structure shown;

[0034] Figure 6 for Figure 1 Another partial exploded schematic diagram of the structure shown.

[0035] The reference numerals in the figures represent respectively:

[0036] 1-cylinder assembly; 11-second mounting structure; 12-cylinder bracket; 13-piston; 14-cylinder;

[0037] 2-power assembly; 21-motor; 22-planetary gearbox; 221-sun gear; 222-planetary gear; 223-planetary gear shaft; 224-planet carrier; 2241-bar mounting position; 225-gearbox output shaft; 2251-second fixing hole; 226-bottom plate; 227-gear ring; 23-bearing;

[0038] 3-power transmission assembly; 31-connecting rod; 32-cam; 321-first through hole; 33-first transmission shaft; 34-locking member;

[0039] 4-noise reduction structure; 41-air inlet; 42-first mounting structure.

[0040] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0042] The directional nouns involved in the embodiments of the present disclosure, such as "upper", "lower", "side", etc., are generally based on the relative directional relationship between the structures when the air pump is usually arranged, and these directional nouns are used only to more clearly describe the relationship between the structures, not to describe the absolute directional. When the air pump is placed in different postures, the directional may change, for example, "upper" and "lower" may be interchangeable.

[0043] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art.

[0044] In order to make the technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0045] The present disclosure provides an air pump. Figure 1-3 The air pump comprises a cylinder assembly 1, a power assembly 2, a power transmission assembly 3 and a noise reduction structure 4;

[0046] The cylinder assembly 1 is connected to the power assembly 2 via the power transmission assembly 3 . The noise reduction structure 4 is installed on the cylinder assembly 1 or the power assembly 2 and at least covers the power transmission assembly 3 .

[0047] It should be noted that the drawings of the present disclosure actually only show the partial structure of the air pump. The actual air pump may also have multiple components such as batteries, air pipes and shells, but these structures have low relevance to the improvements of the present disclosure and are therefore not shown.

[0048] In the disclosed embodiment, the cylinder assembly is connected to the power assembly by means of a power transmission assembly, so that the power of the power assembly can be transmitted to the cylinder assembly, and the cylinder assembly can have components such as a piston, and the piston and other components can be driven to perform piston motion, thereby compressing the air. The compressed air can be transported to the target structure to be inflated, such as a vehicle tire, by means of an air pipe. When the piston is driven to perform piston motion, the power assembly and the power transmission assembly are both in high-speed motion, and the friction between the mechanical components and the friction between the mechanical components and the air are likely to generate noise. By covering at least the power transmission assembly with the help of a noise reduction assembly, the noise leakage of the power transmission assembly itself and the connection between it and the power assembly can be effectively avoided, thereby reducing the working noise level of the air pump.

[0049] That is, the embodiment of the present disclosure provides an air pump, in which the cylinder assembly is connected to the power assembly by means of a power transmission assembly, so that the power of the power assembly can be transmitted to the cylinder assembly, and the air is efficiently compressed in the cylinder assembly. The air pump also has a noise reduction structure, which at least covers the power transmission assembly, so that the mechanical noise generated at the power transmission assembly does not overflow, thereby reducing the noise during the operation of the air pump.

[0050] In some embodiments, reference Figure 1-3 The noise reduction structure 4 has an air inlet 41, which is connected to the cylinder assembly 1. By arranging the air inlet 41 on the noise reduction structure 4, it is possible to effectively ensure that the air intake demand of the cylinder assembly is met on the basis of reducing the working noise of the air pump, and ensure that the working efficiency of the cylinder assembly is high.

[0051] In some embodiments, reference Figure 3 The noise reduction structure 4 includes a first mounting structure 42 , the cylinder assembly 1 or the power assembly 2 includes a second mounting structure 11 , and the noise reduction structure 4 is mounted on the cylinder assembly 1 or the power assembly 2 through the cooperation of the first mounting structure 42 and the second mounting structure 11 .

[0052] By providing the first mounting structure 42 and the second mounting structure 11 , the mounting stability of the noise reduction structure 4 can be improved, thereby preventing the noise reduction structure from falling due to vibration.

[0053] Optional, reference Figure 3 One of the first mounting structure 42 and the second mounting structure 11 is a slot, and the other is a hook; or, one of the first mounting structure 42 and the second mounting structure 11 is at least one of a mounting hole or a mounting slot, and the other is at least one of a shaft, a pin or a screw.

[0054] The implementation of the first mounting structure and the second mounting structure is simple, low in cost, and highly reliable. It should be noted that the number of the first mounting structure and the second mounting structure can be adjusted according to demand, and different implementation forms can be adopted at the same time to further improve the installation reliability. For example, one group of the first mounting structure and the second mounting structure can be implemented as a hook and a slot, another group of the first mounting structure and the second mounting structure can be implemented as a mounting hole and a shaft, and another group of the first mounting structure and the second mounting structure can be implemented as a mounting slot and a shaft.

[0055] In some embodiments, reference Figure 2 The cylinder assembly 1 includes a cylinder bracket 12 , which is fixedly connected to the power assembly 2 , the second mounting structure 11 is arranged on the cylinder bracket 12 , and the noise reduction structure 4 is installed on the cylinder bracket 12 .

[0056] In this embodiment, the cylinder assembly is fixed to the power assembly by means of a cylinder bracket, and the noise reduction structure is installed on the cylinder bracket, so that the installation of the cylinder assembly, the power assembly and the noise reduction structure is more reliable and compact. At the same time, it can also ensure that the noise reduction structure actually covers the part where the power assembly is connected to the cylinder bracket (the part can be the output part of the power assembly, which can include an output shaft or a transmission gear, etc.), thereby further reducing noise.

[0057] In some embodiments, the material of the noise reduction structure 4 includes at least one of plastic, sound-absorbing cotton, and rubber.

[0058] By using the above materials to prepare the noise reduction structure, the noise reduction performance of the noise reduction structure can be effectively ensured.

[0059] In some embodiments, reference Figure 2 , Figure 4 and Figure 5 , the power assembly 2 includes a motor 21 and a planetary gearbox 22, and the motor 21 is configured to drive the planetary gearbox 22 to move;

[0060] The power transmission assembly 3 includes a connecting rod 31, a cam 32 and a first transmission shaft 33. The cam 32 is fixedly connected to the gear box output shaft 225 of the planetary gear box 22. The planetary gear box 22 drives the cam 32 to rotate. One end of the connecting rod 31 and the cam 32 are both rotatably connected to the first transmission shaft 33.

[0061] The cylinder assembly 1 comprises a piston 13 and a cylinder 14 . The piston 13 is located in the cylinder 14 , and the other end of the connecting rod 31 is fixedly connected to the piston 13 .

[0062] In this embodiment, the motor 21 can drive the planetary gearbox 22 to move, and the planetary gearbox 22 can drive the cam 32 to rotate by means of the cooperation between its output shaft 225 and the cam 32. The cam 32 and one end of the connecting rod 31 are both rotatably connected to the first transmission shaft 33, and then when the cam 32 rotates, it drives one end of the connecting rod 31 to rotate around the center of the cam 32. Since the other end of the connecting rod 31 is connected to the piston 13, when one end of the connecting rod 31 rotates around, it can drive the piston 13 to reciprocate in the cylinder 14, thereby compressing the air in the cylinder 14.

[0063] By using a planetary gearbox to transmit the output power of the motor to the cylinder assembly, the noise on the power transmission path can be effectively reduced. At the same time, the planetary gearbox can increase the carrying capacity and reduce the space occupancy, which is beneficial to improve the working efficiency of the air pump and reduce the size of the air pump.

[0064] In some embodiments, reference Figure 6 , the planetary gearbox 22 includes a sun gear 221, planetary gears 222, planetary gear shafts 223, a planet carrier 224 and a gearbox output shaft 225;

[0065] The sun gear 221 is connected to the motor 21 and rotates under the drive of the motor 21;

[0066] The planetary gear 222 is located at the periphery of the sun gear 221 and meshes with the sun gear 221 . The planetary gear 222 is sleeved on the planetary gear shaft 223 . The planetary gear shaft 223 is mounted on the planetary carrier 224 .

[0067] The gearbox output shaft 225 is fixedly connected to the planet carrier 224 and rotates under the drive of the planet carrier 224 .

[0068] In this embodiment, the motor is connected to the sun gear, which can drive the sun gear to rotate at high speed; the sun gear is meshed with the planetary gear, and the planetary gear is driven by the sun gear to rotate around the sun gear; the planetary gear is mounted on the planetary gear shaft, and the planetary gear shaft is fixedly installed on the planetary carrier, and the planetary carrier is driven to rotate by the planetary gear; the gearbox output shaft is fixedly connected to the planetary carrier, and the gearbox output shaft is driven to rotate by the planetary carrier. With the above process, the output power of the motor is transmitted to the gearbox output shaft, and at the same time, the transmission speed ratio of the gearbox output shaft is reduced and the torque is increased compared with the motor output shaft.

[0069] Optional, reference Figure 6 , the number of planetary gears 222 is three or more, and is evenly distributed around the sun gear 221. When the number of planetary gears is 3, the transmission efficiency is high, and the structure of the gearbox is compact and lightweight. When the number of planetary gears is 4 or more, the planetary gearbox can withstand greater reversal torque and impact load.

[0070] In some embodiments, reference Figure 6 The power assembly 2 further includes a bearing 23, which is sleeved on the gearbox output shaft 225. The bearing can improve the verticality of the gearbox output shaft and limit the position of the gearbox output shaft.

[0071] Optionally, the bearing 23 is a ball bearing, which can reduce the resistance of the bearing to the movement of the gearbox output shaft and improve the working efficiency of the gearbox output shaft.

[0072] In some embodiments, reference Figure 6 The planet carrier 224 has a strip-shaped mounting position 2241, and one end of the gearbox output shaft 225 is embedded in the strip-shaped mounting position 2241. In this way, it can be ensured that the planet carrier drives the gearbox output shaft with higher reliability.

[0073] In some embodiments, reference Figure 6 , the planetary gearbox 22 further includes a base plate 226 and / or a ring gear 227;

[0074] The bottom plate 226 is mounted on the bottom of the planetary gearbox 22 and is fixedly connected to the motor 21;

[0075] The gear ring 227 is sleeved on the periphery of the planetary gear 222 and fixedly connected to the bottom plate 226 .

[0076] In this embodiment, the planetary gearbox can realize its own packaging and fixed connection with the motor with the help of the base plate, and the planetary gears can be packaged with the help of the ring gear to improve the reliability of the operation of the planetary gears.

[0077] In some embodiments, reference Figure 5 and Figure 6 The side wall of the cam 32 has a first through hole 321 , the power transmission assembly 3 further includes a locking member 34 , the side wall of the gearbox output shaft 225 has a second fixing hole 2251 , and the locking member 34 is tightened in the second fixing hole 2251 through the first through hole 321 .

[0078] With the aid of the locking member 34 , the relative positions of the gearbox output shaft 225 and the cam 32 can be effectively fixed, thereby ensuring the driving effect of the gearbox output shaft 225 on the cam 32 .

[0079] To sum up, the embodiments of the present disclosure provide an air pump, which uses a noise reduction structure to block the noise of the mechanical structure in the air pump, thereby effectively reducing the working noise level of the air pump; it also uses a planetary gearbox to transmit power, thereby reducing the noise level of the mechanical structure itself, and further reducing the working noise level of the air pump.

[0080] In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

[0081] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only.

[0082] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air pump, characterized in that: It comprises a cylinder assembly (1), a power assembly (2), a power transmission assembly (3) and a noise reduction structure (4); The cylinder assembly (1) and the power assembly (2) are connected via the power transmission assembly (3); the noise reduction structure (4) is installed on the cylinder assembly (1) or the power assembly (2) and at least covers the power transmission assembly (3).

2. The air pump according to claim 1, characterized in that: The noise reduction structure (4) has an air inlet (41), and the air inlet (41) is connected to the cylinder assembly (1).

3. The air pump according to claim 1, characterized in that: The noise reduction structure (4) comprises a first mounting structure (42), the cylinder assembly (1) or the power assembly (2) comprises a second mounting structure (11), and the noise reduction structure (4) is mounted on the cylinder assembly (1) or the power assembly (2) through the cooperation of the first mounting structure (42) and the second mounting structure (11).

4. The air pump according to claim 3, characterized in that: One of the first mounting structure (42) and the second mounting structure (11) is a slot, and the other is a hook; or one of the first mounting structure (42) and the second mounting structure (11) is at least one of a mounting hole or a mounting slot, and the other is at least one of a shaft, a pin or a screw.

5. The air pump according to claim 3, characterized in that: The cylinder assembly (1) comprises a cylinder bracket (12), the cylinder bracket (12) is fixedly connected to the power assembly (2), the second mounting structure (11) is arranged on the cylinder bracket (12), and the noise reduction structure (4) is mounted on the cylinder bracket (12).

6. The air pump according to any one of claims 1 to 5, characterized in that: The material of the noise reduction structure (4) includes at least one of plastic, sound-absorbing cotton and rubber.

7. The air pump according to any one of claims 1 to 5, characterized in that: The power assembly (2) comprises a motor (21) and a planetary gearbox (22), wherein the motor (21) is configured to drive the planetary gearbox (22) to move; The power transmission assembly (3) comprises a connecting rod (31), a cam (32) and a first transmission shaft (33); the cam (32) is fixedly connected to a gear box output shaft (225) of the planetary gear box (22); the planetary gear box (22) drives the cam (32) to rotate; one end of the connecting rod (31) and the cam (32) are both rotationally connected to the first transmission shaft (33); The cylinder assembly (1) comprises a piston (13) and a cylinder (14); the piston (13) is located in the cylinder (14); and the other end of the connecting rod (31) is fixedly connected to the piston (13).

8. The air pump according to claim 7, characterized in that: The planetary gearbox (22) comprises a sun gear (221), planetary gears (222), a planetary gear shaft (223), a planet carrier (224) and the gearbox output shaft (225); The sun gear (221) is connected to the motor (21) and rotates when driven by the motor (21); The planetary gear (222) is located outside the sun gear (221) and meshes with the sun gear (221), the planetary gear (222) is sleeved on the planetary gear shaft (223), and the planetary gear shaft (223) is mounted on the planet carrier (224); The gear box output shaft (225) is fixedly connected to the planet carrier (224) and rotates under the drive of the planet carrier (224).

9. The air pump according to claim 8, characterized in that: The number of the planetary gears (222) is three or more, and they are evenly distributed around the sun gear (221).

10. The air pump according to any one of claims 8 to 9, characterized in that: The power assembly (2) further comprises a bearing (23), wherein the bearing (23) is sleeved outside the gearbox output shaft (225).

11. The air pump according to any one of claims 8 to 9, characterized in that: The planet carrier (224) has a strip-shaped mounting position (2241), and one end of the gearbox output shaft (225) is embedded in the strip-shaped mounting position (2241).

12. The air pump according to any one of claims 8 to 9, characterized in that: The planetary gearbox (22) further includes a base plate (226) and / or a ring gear (227); The bottom plate (226) is installed on the bottom of the planetary gear box (22) and is fixedly connected to the motor (21); The gear ring (227) is sleeved on the periphery of the planetary gear (222) and is fixedly connected to the base plate (226).

13. The air pump according to claim 7, characterized in that: The side wall of the cam (32) has a first through hole (321), the power transmission assembly (3) further includes a locking member (34), the side wall of the gearbox output shaft (225) has a second fixing hole (2251), and the locking member (34) is screwed into the second fixing hole (2251) through the first through hole (321).

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