Motor cylinder of air compressor

Abstract

According to the motor cylinder of the air compressor, a motor assembly is installed in the motor cylinder, the two ends of the motor cylinder are connected with crank cases respectively, air compression assemblies are installed in the crank cases, a check ring is arranged at the end of a motor coil in the motor cylinder, and the check ring is arranged around a center shaft of the motor assembly. According to the motor cylinder of the air compressor provided by the utility model, the check ring is arranged in a surrounding manner, and the check ring effectively blocks external particles or dust, so that a good heat dissipation effect of a motor coil is realized, and the motor coil is prevented from being damaged by the particles.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a motor cylinder of an air compressor. Background Art

[0002] An air compressor is short for an air compressor, which is an industrial device for compressing gases. In the prior art, during operation, the temperature of the motor of the air compressor will rise. Since the motor cannot work for a long time at high temperatures, when the temperature of the motor exceeds a preset value, the motor needs to immediately stop working for cooling until the temperature of the motor returns within the preset value before it can start working again.

[0003] There are two types of air compressors on the market. One is that the motor coils are fully open; the other is that the motor coils are fully enclosed.

[0004] Chinese Utility Model Patent CN220667771U discloses an internal intake air compressor, which includes a cylinder head, a valve plate, a crankcase, a connecting rod arranged in the crankcase, and a piston arranged at the upper end of the connecting rod. The crankcase is provided with a first intake hole. An air outlet chamber is formed between the valve plate and the cylinder head. A compression chamber is formed between the piston and the valve plate. The piston has a second intake hole communicating the compression chamber and the inside of the crankcase. An intake valve plate for blocking the second intake hole is arranged on the piston. The valve plate has a first air outlet hole communicating the compression chamber and the air outlet chamber. An air outlet valve plate for blocking the first air outlet hole is arranged on the valve plate. This structure ensures low intake noise while solving the problems of high machining difficulty of the cylinder and difficult assembly of the air compressor.

[0005] Chinese Utility Model Patent CN210637212U discloses an air compressor with an improved heat dissipation structure, which includes a box body and a cylinder. An air inlet is arranged at the outer end of the box body. A rotating shaft is installed inside the box body, and a crank and a fan blade are installed on the rotating shaft. The cylinder includes a cylinder liner, a valve plate and a cylinder head. A piston is installed inside the cylinder liner. The piston is connected to the crank through a connecting rod. An intake chamber and an air outlet chamber are arranged inside the cylinder head on the inner side. Heat dissipation channels are arranged on the cylinder head and the valve plate around the intake chamber and the air outlet chamber. The heat dissipation channels communicate with the inside of the box body. The intake chamber on the cylinder head is above the inner side of the connecting rod, and the air outlet chamber on the cylinder head is close to the outer end of the box body. This air compressor has good heat dissipation efficiency and can make full use of the heat dissipation airflow generated by the fan blade.

[0006] However, the problem is that when the coil is fully enclosed by the end cover, the heat dissipation effect is poor. When the torque output by the motor power is more than 1.1 times the power required by the air compressor (input torque), it causes high costs and waste of resources; when the coil is fully open, it is easily damaged by particulate matter, metal particles adhere to the coil causing a short circuit, and the motor is easily burned out. Content of the Utility Model

[0007] Technical Problems to be Solved

[0008] In view of this, an embodiment of this specification provides a motor barrel of an air compressor with good heat dissipation effect and capable of preventing particulate matter from damaging the motor coil.

[0009] Technical solution

[0010] To solve the above technical problem, the present utility model provides the following technical solution: A motor barrel of an air compressor, a motor assembly is installed inside the motor barrel, crankcases are respectively connected to both ends of the motor barrel, an air compression assembly is installed inside the crankcases, a retaining ring is provided at the end of the motor coil inside the motor barrel, and the retaining ring is arranged around the central axis of the motor assembly.

[0011] Compared with the prior art, the retaining ring is arranged in a surrounding manner, and the retaining ring effectively blocks external particles or dust, preventing the particles or dust from damaging the coil of the motor assembly.

[0012] In some embodiments, the retaining ring surrounds to form a receiving cavity for receiving the coil of the motor assembly, and the retaining ring has a semi - enclosed structure. Through the above improvement, the semi - enclosed structure can effectively block external particles or dust.

[0013] In some embodiments, the middle through - hole of the retaining ring is larger than the diameter of the rotating shaft of the motor assembly. Through the above improvement, the rotating shaft can extend out through the through - hole of the retaining ring.

[0014] In some embodiments, the retaining ring is formed by plastic molding. Through the above improvement, with plastic material, it has good molding degree, cost control, good insulation and anti - leakage performance, and good safety - regulation performance.

[0015] In some embodiments, a plurality of heat - dissipation holes are provided on the retaining ring, and the plurality of heat - dissipation holes are arranged around the central axis of the retaining ring. Through the above improvement, the heat - dissipation efficiency is enhanced.

[0016] In some embodiments, a wind vane is provided between the retaining ring and the air compression assembly, and the wind vane is fixed on the motor shaft of the motor assembly. Through the above improvement, the wind vane rotates to drive the flow of external cold air, taking away the heat of the coil of the motor assembly.

[0017] In some embodiments, the retaining ring and the motor barrel are separately arranged. Through the above improvement, by being separately arranged, the detachable retaining ring can be used to clean internal sundries and perform maintenance on the equipment.

[0018] In some embodiments, a plurality of air compression assemblies are installed inside the crankcase. Through the above improvement, the setting of a plurality of air compression assemblies improves the working efficiency of the air compressor.

[0019] In some embodiments, the retaining ring and the motor barrel are integrally formed. Through the above improvement, by being integrally formed, the connection between the retaining ring and the motor barrel is more stable, and it operates more stably.

[0020] In some embodiments, a plurality of ventilation holes are provided on the motor cylinder. Through the above improvement, the air intake volume increases and the heat dissipation efficiency is higher.

[0021] Beneficial effects

[0022] A motor cylinder of an air compressor provided by the present utility model allows external air flow to enter the motor assembly through the motor cylinder, thereby cooling the motor assembly. Through the semi-enclosed setting, the end cover semi-surrounds and shields the motor coil. When the fan blade rotates, small objects will not enter the coil.

[0023] When the fan blade rotates, the heat generated by the coil is timely extracted. At the same time, a negative pressure space is formed at the motor coil part, making the heat dissipation effect better. The heat blind area that cannot be taken away by the positive pressure is taken away by the vacuum effect, dissipating heat from the motor coil and the interior of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2 is a schematic cross-sectional structural diagram of the present utility model;

[0027] Figure 3 is a schematic structural diagram of the cooperation between the motor cylinder and the retaining ring of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the motor cylinder of the present utility model;

[0029] Figure 5 is a schematic structural diagram of the retaining ring of the present utility model;

[0030] Figure 6 is a schematic structural diagram of the retaining ring from another angle of the present utility model;

[0031] Figure 7 is a schematic structural diagram of other embodiments of the present utility model;

[0032] Figure 8 is a schematic cross-sectional structural diagram of other embodiments of the present utility model;

[0033] Figure 9 is a schematic structural diagram of the motor cylinder of other embodiments of the present utility model;

[0034] Figure 10 Schematic diagram of another angle of the motor cylinder according to other embodiments of the present utility model;

[0035] Figure 11 Schematic diagram of the structure of the heat dissipation holes according to another embodiment of the present utility model;

[0036] Figure 12 Schematic diagram of the structure of the retaining ring according to another embodiment of the present utility model.

[0037] In the figure: 1. Motor assembly; 1.1. Rotating shaft; 1.2. Blades; 1.3. Stator; 2. Motor cylinder; 2.1. Retaining ring; 2.2. Accommodating cavity; 2.3. Channel; 2.4. Ventilation hole; 2.5. Heat dissipation hole; 3. Crankcase; 4. Air compression assembly. Detailed implementation manners

[0038] The following describes the present application in detail with reference to the accompanying drawings and specific embodiments.

[0039] The following illustrates the implementation manners of the present application through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0040] It should also be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The drawings only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0041] In addition, in the following description, specific details are provided for a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0042] The following describes the technical solutions provided by each embodiment of the present application with reference to the accompanying drawings.

[0043] Please refer to Figure 1-7As shown, in this embodiment: a motor cylinder of an air compressor, a motor assembly 1 is installed inside the motor cylinder 2, crankcases 3 are respectively connected to both ends of the motor cylinder 2, an air compression assembly is installed inside the crankcases 3, a retaining ring 2.1 is provided at the end of the motor coil inside the motor cylinder 2, and the retaining ring 2.1 is arranged around the central axis of the motor assembly 1.

[0044] The retaining ring 2.1 is arranged in a surrounding manner, and the retaining ring 2.1 effectively blocks external particles or dust, preventing the particles or dust from damaging the coil of the motor assembly 1.

[0045] In some embodiments, such as Figure 1-7 As shown, the retaining ring 2.1 surrounds to form a receiving cavity 2.2 for receiving the coil of the motor assembly 1, and the retaining ring is of a semi - enclosed structure. It should be noted that the retaining ring 2.1 is arranged in a semi - enclosed manner, effectively blocking external particles or dust.

[0046] In some embodiments, such as Figure 2 As shown, the middle through - hole of the retaining ring 2.1 is larger than the diameter of the rotating shaft 1.1 of the motor assembly 1. It should be noted that the rotating shaft 1.1 can extend out through the through - hole of the retaining ring 2.1.

[0047] In some embodiments, such as Figures 4-6 As shown, the retaining ring 2.1 is formed by plastic molding. It should be noted that with plastic material, it has good molding degree, cost control, good insulation and anti - leakage performance, and good safety - regulation performance.

[0048] In some embodiments, such as Figure 11 As shown, a plurality of heat - dissipation holes 2.5 are provided on the retaining ring 2.1, and the plurality of heat - dissipation holes 2.5 are arranged around the central axis of the retaining ring 2.1. Through the above improvement, the heat - dissipation efficiency is enhanced.

[0049] In some embodiments, such as Figure 2 As shown, a wind blade 1.2 is provided between the retaining ring 2.1 and the air compression assembly 4, and the wind blade 1.2 is fixed on the motor shaft of the motor assembly 1. It should be noted that the rotation of the wind blade 1.2 drives the flow of external cold air, taking away the heat of the coil of the motor assembly 1.

[0050] In some embodiments, such as Figures 3-6 As shown, the retaining ring 2.1 and the motor cylinder 2 are separately arranged. It should be noted that through the separate arrangement, the detachable retaining ring 2.1 can be used to clean internal sundries and perform maintenance on the equipment.

[0051] In some embodiments, such as Figure 4 As shown, the motor cylinder 2 is provided with ventilation holes 2.4 with a width not greater than 4 mm. It should be noted that larger particles can be blocked, while smaller particles can be taken away by the wind generated by the wind blade 1.2.

[0052] In some embodiments, a plurality of air compression components 4 are installed in the crankcase 3. It should be noted that the arrangement of the plurality of air compression components 4 improves the working efficiency of the air compressor.

[0053] In some embodiments, as Figures 5-6 shown, the retaining ring 2.1 is provided with a through-channel 2.3 for the inside and outside. It should be noted that the setting of the channel 2.3 forms gas flow and accelerates heat dissipation.

[0054] Working principle: When the air compressor starts to operate, the motor drives the fan blade 1.2 to rotate, and the outside cold air is passed through the ventilation holes 2.4. The ventilation holes 2.4 initially block large-volume particulate matters. A negative pressure space is formed between the motor coil and the fan blade 1.2. Due to the existence of the negative pressure space, the heat dissipated from the motor coil is discharged through the channel 2.3 along with the air flowing into the motor. Heat dissipation is carried out by drawing air at the end face and the center of the motor coil, so as to cool down the motor coil.

[0055] The heat generated by the motor coil is more than 10 degrees lower by the air-drawing type of heat dissipation than by the air-blowing type of heat dissipation.

[0056] In other embodiments, as Figures 7-10 shown, the retaining ring 2.1 and the motor cylinder 2 are integrally formed. Through the integral forming setting, the connection between the retaining ring 2.1 and the motor cylinder 2 is more stable and the operation is more stable. The same or similar parts among the various embodiments in this specification can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0057] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A motor cylinder of an air compressor, wherein a motor assembly (1) is installed in the motor cylinder (2), both ends of the motor cylinder (2) are respectively connected to a crankcase (3), and an air compression assembly (4) is installed in the crankcase (3), and the characteristics are as follows: A retaining ring (2.1) is provided at the end of the motor coil inside the motor cylinder (2), and the retaining ring (2.1) is arranged around the central axis of the motor assembly (1).

2. The motor cylinder of an air compressor according to claim 1, characterized in that: The retaining ring (2.1) surrounds to form an accommodation cavity (2.2) for accommodating the coil of the motor assembly (1), and the retaining ring (2.1) has a semi - enclosed structure.

3. The motor cylinder of an air compressor according to claim 2, characterized in that: The middle through - hole of the retaining ring (2.1) is larger than the diameter of the rotating shaft (1.1) of the motor assembly (1).

4. The motor cylinder of an air compressor according to claim 3, characterized in that: The retaining ring (2.1) is formed by plastic molding.

5. The motor cylinder of an air compressor according to claim 2, characterized in that: A plurality of heat dissipation holes (2.5) are provided on the retaining ring (2.1), and the plurality of heat dissipation holes (2.5) are arranged around the central axis of the retaining ring (2.1).

6. The motor cylinder of an air compressor according to claim 1, wherein: A wind blade (1.2) is provided between the retaining ring (2.1) and the air compression assembly (4), and the wind blade (1.2) is fixed on the motor shaft of the motor assembly (1).

7. The motor cylinder of an air compressor according to claim 1, characterized in that: The retaining ring (2.1) and the motor cylinder (2) are separately arranged.

8. A motor cylinder of an air compressor according to any one of claims 1-7, characterized in that: A plurality of the air compression assemblies (4) are installed in the crankcase (3).

9. A motor cylinder of an air compressor according to any one of claims 1-6, characterized in that: The retaining ring (2.1) and the motor cylinder (2) are integrally formed.

10. A motor cylinder of an air compressor according to any one of claims 1-7, characterized in that: A plurality of ventilation holes (2.4) are provided on the motor cylinder (2).

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