Driving device and air compressor

Abstract

The utility model relates to motor technical field, especially a kind of driving device and air compressor, stator assembly and rotor assembly are arranged in shell, rotor assembly is movably arranged in the inside of stator assembly, the front end of rotor assembly is connected with output shaft, reciprocating guide rail of closed curve trajectory is arranged around the outside wall of output shaft, reciprocating body is also movably arranged in shell, the left and right ends of reciprocating body inside are movably provided with large ball, large ball is drivingly connected in reciprocating guide rail, the front end of reciprocating body is connected with connecting shaft, when stator assembly is energized, drive rotor assembly to rotate, to drive output shaft to rotate, large ball moves on reciprocating guide rail on output shaft, to drive the reciprocating movement of the connecting shaft of reciprocating body, and the driving device inside motor uses inner rotor structure, and the volume is smaller, can reduce the space occupied by installation machinery.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a drive device and an air compressor. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque, serving as a power source for electrical appliances or various machines.

[0003] For example, patent publication number CN118971462A discloses a drive device. The motor described in this application includes a fixed bracket, a stator assembly, a rotor assembly, and a shaft assembly. The fixed bracket has an installation channel. The stator assembly is installed on the fixed bracket. The rotor assembly includes a rotor bracket and a permanent magnet. The rotor bracket movably covers the rotor assembly. The permanent magnets are spaced apart on the inner sidewall of the rotor bracket. The permanent magnets are spaced apart from the sidewall of the stator assembly. The shaft assembly includes a motor shaft and a first planar bearing. The motor shaft is rotatably disposed in the installation channel. The input end of the motor shaft is connected to the rotor bracket. The first planar bearing is disposed between the fixed bracket and the rotor bracket.

[0004] The problem with the above technology is that the motor mounts a stator assembly on a fixed bracket and movably covers the rotor assembly on top of the stator assembly. When the stator assembly is energized, it generates an electromagnetic field, which drives the permanent magnet of the rotor assembly and the rotor bracket to rotate. The motor shaft is located in the mounting channel of the fixed bracket, and the input end of the motor shaft is connected to the rotor bracket of the rotor assembly, so that the rotation of the rotor assembly drives the rotation of the motor shaft. In order to protect the assembly from external influences, the above-mentioned components are generally placed in a housing. However, since the rotor assembly is covered by the stator assembly, the housing needs to make room for the rotor assembly to rotate in order for the rotor assembly to rotate. Therefore, the volume of the housing will be large. For some mechanical equipment, using this motor structure will increase the space occupied, thereby increasing the size of the mechanical equipment.

[0005] To address these technical problems, a drive device and an air compressor are proposed. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a drive device and an air compressor. Unlike traditional motors, the motor structure in this drive device can reduce the volume occupied and has strong stability.

[0007] The technical solution adopted by this utility model to solve the problem is: a drive device and an air compressor, including a housing, a stator assembly and a rotor assembly are arranged inside the housing, the rotor assembly is movably arranged inside the stator assembly, the front end of the rotor assembly is connected to an output shaft, a reciprocating guide rail with a closed curved trajectory is arranged around the outer side wall of the output shaft, a reciprocating assembly is also movably arranged inside the housing, the reciprocating assembly includes a reciprocating body, large ball bearings are movably arranged at the left and right ends of the inner side of the reciprocating body, the large ball bearings are drivenly connected to the reciprocating guide rail, and the front end of the reciprocating body is connected to a connecting shaft extending to the outer side of the housing.

[0008] As a further improvement to the above technical solution, a sliding sleeve assembly is provided on the outer side of the large ball bearing, and a number of small balls are provided on the sliding sleeve assembly, with the small balls located between the large ball bearing and the inner wall of the reciprocating body.

[0009] As a further improvement to the above technical solution, a pressure relief valve is provided on the housing, which connects the inside of the housing with the outside.

[0010] As a further improvement to the above technical solution, the stator assembly includes several segmented stators arranged in a ring, each segmented stator having at least one turn of coil wound on it, and a terminal block being provided at the front end of each segmented stator, with the coil electrically connected to the terminal block.

[0011] As a further improvement to the above technical solution, the rotor assembly includes a rotating disk with a plurality of mounting slots evenly distributed at intervals on the rotating disk. A permanent magnet is disposed in the mounting slot. A through slot is disposed in the middle of the rotating disk, and a rotating shaft is disposed in the through slot. The rotating shaft extends to the front side of the rotating disk, and the output shaft is connected to the front end of the rotating shaft.

[0012] As a further improvement to the above technical solution, a bearing is fitted onto the rotating shaft.

[0013] As a further improvement to the above technical solution, the system includes a main body, a compression chamber inside the main body, a piston inside the compression chamber, a motor inside the main body and located beside the compression chamber, the piston being connected to the front side of a connecting shaft, an air inlet and an air outlet communicating with each other on the compression chamber, and an air outlet end on the outer side of the main body communicating with the air outlet.

[0014] As a further improvement to the above technical solution, a vent hole is provided in the middle of the main body, and a fan wheel is connected to the rotating shaft. The fan wheel is located between the housing and the compression chamber, and the fan wheel is located inside the vent hole; or a vent hole is provided at the front end of the main body, the rotating shaft extends laterally to both ends of the rotating disk, the rear end of the rotating shaft is connected to the reciprocating assembly, the front end of the rotating shaft is connected to the fan wheel, and the fan wheel is located inside the vent hole.

[0015] As a further improvement to the above technical solution, the bottom of the main body is provided with a support foot, and a shock-absorbing spring is provided between the support foot and the main body.

[0016] As a further improvement to the above technical solution, a battery assembly is also included, which is disposed on the rear side of the main body or on the top of the main body, and the battery assembly is electrically connected to the motor.

[0017] The beneficial effects of this utility model are: when the stator assembly is powered on, it drives the rotor assembly to rotate, thereby driving the output shaft to rotate. The large ball moves on the reciprocating guide rail on the output shaft, thereby driving the reciprocating body to move, and causing the connecting shaft on the reciprocating body to move back and forth. The reciprocating motion driven by the reciprocating guide rail has the advantages of higher transmission efficiency, more compact transmission structure, and better stability. In addition, the motor in this drive device adopts an internal rotor structure, which is smaller in size and can reduce the space occupied by the installation machinery. Attached Figure Description

[0018] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a structural diagram of the motor of this utility model;

[0020] Figure 2 This is a front view of the motor of this utility model;

[0021] Figure 3 for Figure 2 A cross-sectional view of section AA;

[0022] Figure 4 for Figure 2 A cross-sectional view of the BB section;

[0023] Figure 5 This is a structural diagram of the output shaft of this utility model;

[0024] Figure 6 This is a structural diagram of the stator assembly and rotor assembly of this utility model;

[0025] Figure 7 This is a structural diagram of the air compressor in Embodiment 1 of this utility model;

[0026] Figure 8 This is a cross-sectional view of the air compressor in Embodiment 1 of this utility model;

[0027] Figure 9 This is a structural diagram of the air compressor in Embodiment 2 of this utility model;

[0028] Figure 10 This is a cross-sectional view of the air compressor in Embodiment 2 of this utility model.

[0029] In the diagram: 1-Housing, 11-Pressure relief valve, 2-Stator assembly, 21-Segmented stator, 22-Terminal board, 23-Coil, 3-Rotor assembly, 31-Rotating disk, 32-Mounting slot, 33-Permanent magnet, 34-Through slot, 35-Rotating shaft, 36-Bearing, 4-Output shaft, 41-Reciprocating guide rail, 5-Reciprocating assembly, 51-Reciprocating body, 52-Large ball bearing, 53-Connecting shaft, 54-Sliding sleeve assembly, 55-Small ball bearing, 6-Main body, 61-Outlet end, 62-Ventilation hole, 63-Support foot, 64-Shock-absorbing spring, 7-Compression chamber, 8-Iron wheel, 9-Battery assembly. Detailed Implementation

[0030] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or 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 limitations on this utility model.

[0032] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] Reference Figures 1 to 10A drive device and an air compressor include a housing 1, a stator assembly 2 and a rotor assembly 3 are disposed inside the housing 1, the rotor assembly 3 is movably disposed inside the stator assembly 2, the front end of the rotor assembly 3 is connected to an output shaft 4, a reciprocating guide rail 41 with a closed curved trajectory is disposed around the outer side wall of the output shaft 4, a reciprocating assembly 5 is also movably disposed inside the housing 1, the reciprocating assembly 5 includes a reciprocating body 51, large ball bearings 52 are movably disposed at the left and right ends of the inner side of the reciprocating body 51, the large ball bearings 52 are drively connected to the reciprocating guide rail 41, and the front end of the reciprocating body 51 is connected to a connecting shaft 53 extending to the outer side of the housing 1;

[0035] When the stator assembly 2 is powered on, it drives the rotor assembly 3 to rotate, thereby driving the output shaft 4 to rotate. The large ball 52 moves on the reciprocating guide rail 41 on the output shaft 4, thereby driving the reciprocating body 51 to move, causing the connecting shaft 53 on the reciprocating body 51 to reciprocate. The reciprocating motion driven by the reciprocating guide rail 41 has the advantages of higher transmission efficiency, more compact transmission structure, and better stability.

[0036] In a preferred embodiment, a sliding sleeve assembly 54 is sleeved on the outer side of the large ball bearing 52. The sliding sleeve assembly 54 is provided with a plurality of small balls 55. The small balls 55 are located between the large ball bearing 52 and the inner wall of the reciprocating body 51. The small balls 55 can reduce the friction between the large ball bearing 52 and the reciprocating body 51, thereby increasing the service life of the reciprocating structure.

[0037] In a preferred embodiment, a pressure relief valve 11 is provided on the housing 1, which connects the inside of the housing 1 to the outside. The pressure relief valve 11 can balance the air pressure generated by the reciprocating motion of the reciprocating assembly 5 and prevent cylinder explosion.

[0038] In a preferred embodiment, the stator assembly 2 includes a plurality of segmented stators 21 arranged in a ring. At least one turn of coil 23 is wound on each segmented stator 21. A terminal block 22 is provided at the front end of each segmented stator 21. The coil 23 is electrically connected to the terminal block 22. By installing the plurality of segmented stators 21 in the housing 1 respectively, the slot fill factor can be increased.

[0039] In a preferred embodiment, the rotor assembly 3 includes a rotating disk 31, on which a plurality of mounting slots 32 are evenly distributed and spaced apart. A permanent magnet 33 is disposed in the mounting slots 32. A through slot 34 is disposed in the middle of the rotating disk 31. A rotating shaft 35 is disposed in the through slot 34. The rotating shaft 35 extends to the front side of the rotating disk 31, and the output shaft 4 is connected to the front end of the rotating shaft 35.

[0040] In a preferred embodiment, a bearing 36 is sleeved on the rotating shaft 35. The bearing 36 can withstand the radial force of the rotating shaft 35, ensuring the stable rotation of the rotating shaft 35 and improving operational stability.

[0041] In a preferred embodiment, the system includes a main body 6, a compression chamber 7 is provided inside the main body 6, a piston is provided inside the compression chamber 7, a motor is provided inside the main body 6 and located beside the compression chamber 7, the piston is connected to the front side of the connecting shaft 53, the compression chamber 7 is provided with an air inlet and an air outlet communicating with it, and an air outlet end 61 is provided on the outside of the main body 6, which communicates with the air outlet.

[0042] When in use, the motor can drive the piston to reciprocate in the compression chamber 7. Gas can enter the compression chamber 7 from the air inlet and be pressurized in the compression chamber 7, so that the gas can be discharged from the air outlet. Finally, the gas is discharged from the air outlet 61, and the air outlet 61 can be connected to the air gun.

[0043] The patent with publication number CN222558685U discloses a compression device. The effect of the compression device driving the piston in the cylinder has been disclosed in the prior art, so it will not be repeated here.

[0044] In a preferred embodiment, a vent 62 is provided in the middle of the main body 6, and a fan 8 is connected to the rotating shaft 35. The fan 8 is located between the housing 1 and the compression chamber 7, and the fan 8 is located inside the vent 62.

[0045] The main body 6 has a vent 62 at its front end, the rotating shaft 35 extends laterally to both ends of the rotating disk 31, the rear end of the rotating shaft 35 is connected to the reciprocating assembly 5, and the front end of the rotating shaft 35 is connected to the impeller 8, which is located inside the vent 62.

[0046] In a preferred embodiment, a support foot 63 is provided at the bottom of the main body 6, and a shock-absorbing spring 64 is provided between the support foot 63 and the main body 6.

[0047] In a preferred embodiment, the system further includes a battery assembly 9, which is disposed on the rear side of the main body 6 or on the top of the main body 6. The battery assembly 9 is electrically connected to the motor and can provide energy to the motor, making it convenient for the air compressor to be carried and used.

[0048] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A driving device, characterized in that: The device includes a housing (1), in which a stator assembly (2) and a rotor assembly (3) are disposed. The rotor assembly (3) is movably disposed inside the stator assembly (2). An output shaft (4) is connected to the front end of the rotor assembly (3). A reciprocating guide rail (41) with a closed curved trajectory is disposed around the outer wall of the output shaft (4). A reciprocating assembly (5) is also movably disposed inside the housing (1). The reciprocating assembly (5) includes a reciprocating body (51). Large ball bearings (52) are movably disposed at the left and right ends of the inner side of the reciprocating body (51). The large ball bearings (52) are connected to the reciprocating guide rail (41). A connecting shaft (53) extending to the outer side of the housing (1) is connected to the front end of the reciprocating body (51).

2. The driving device as described in claim 1, characterized in that: The outer side of the large ball bearing (52) is fitted with a sliding sleeve assembly (54), and the sliding sleeve assembly (54) is provided with a number of small balls (55), which are located between the large ball bearing (52) and the inner wall of the reciprocating body (51).

3. The driving device as described in claim 2, characterized in that: The housing (1) is provided with a pressure relief valve (11) that connects the inside of the housing (1) to the outside.

4. The driving device as described in claim 3, characterized in that: The stator assembly (2) includes several segmented stators (21) arranged in a ring. At least one coil (23) is wound on each segmented stator (21). A terminal block (22) is provided at the front end of each segmented stator (21). The coil (23) is electrically connected to the terminal block (22).

5. The driving device as described in claim 4, characterized in that: The rotor assembly (3) includes a rotating disk (31), on which a plurality of mounting slots (32) are evenly distributed at intervals. A permanent magnet (33) is provided in the mounting slot (32). A through slot (34) is provided in the middle of the rotating disk (31). A rotating shaft (35) is provided in the through slot (34). The rotating shaft (35) extends to the front side of the rotating disk (31). The output shaft (4) is connected to the front end of the rotating shaft (35).

6. The driving device as described in claim 5, characterized in that: A bearing (36) is fitted onto the rotating shaft (35).

7. An air compressor, comprising the drive device as described in claim 6, characterized in that: The device includes a main body (6), a compression chamber (7) is provided inside the main body (6), a piston is provided inside the compression chamber (7), the driving device includes a motor, the motor is provided inside the main body (6) and located beside the compression chamber (7), the piston is connected to the front side of the connecting shaft (53), the compression chamber (7) is provided with an air inlet and an air outlet communicating with it, and an air outlet end (61) is provided on the outside of the main body (6), the air outlet end (61) communicating with the air outlet.

8. An air compressor as described in claim 7, characterized in that: A vent hole (62) is provided in the middle of the main body (6), and a fan wheel (8) is connected to the rotating shaft (35). The fan wheel (8) is located between the housing (1) and the compression chamber (7), and the fan wheel (8) is located inside the vent hole (62). Alternatively, the front end of the main body (6) is provided with a vent hole (62), the rotating shaft (35) extends laterally to both ends of the rotating disk (31), the rear end of the rotating shaft (35) is connected to the reciprocating assembly (5), the front end of the rotating shaft (35) is connected to a fan wheel (8), and the fan wheel (8) is located inside the vent hole (62).

9. An air compressor as described in claim 8, characterized in that: The bottom of the main body (6) is provided with a support foot (63), and a shock-absorbing spring (64) is provided between the support foot (63) and the main body (6).

10. An air compressor as described in claim 9, characterized in that: It also includes a battery assembly (9), which is disposed on the rear side of the main body (6) or on the top of the main body (6), and the battery assembly (9) is electrically connected to the motor.

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