Transmission mechanism of air compressor

Abstract

The utility model provides a transmission mechanism of an air compressor, and belongs to the technical field of air compressors. The technical problem that the temperature in an existing crankcase is prone to rising is solved. A transmission mechanism of an air compressor comprises a crankcase internally provided with a containing cavity, a driving motor is fixedly connected to the crankcase, the driving motor comprises a motor shaft, one end of the motor shaft extends into the containing cavity, air cylinders are fixedly arranged on the two sides, perpendicular to the driving motor, of the crankcase respectively, two eccentric wheels are fixedly connected to the motor shaft, and the two eccentric wheels are fixedly connected to the crankshaft. The two eccentric wheels are fixedly sleeved with bearings respectively, the two bearings are fixedly sleeved with connecting rods respectively, the ends, away from the motor shaft, of the connecting rods are fixedly connected with pistons, and the pistons are located in the air cylinder. The air compressor is fast in heat dissipation and high in efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of air compressor technology, and specifically refers to a transmission mechanism for an air compressor. Background Technology

[0002] A reciprocating compressor is a type of compressor that uses the reciprocating motion of a piston to pressurize and transport gas. It mainly consists of a working chamber, transmission components, a casing, and auxiliary parts. The working chamber, directly used to compress gas, comprises a cylinder, cylinder liner, valves, piston, and connecting rod. The piston, driven by the connecting rod, reciprocates within the cylinder. The volumes of the working chambers on either side of the piston alternately change in opposite directions. On the side with a smaller volume, gas is discharged through the valve due to increased pressure, while on the side with a larger volume, gas is drawn in through the valve due to decreased pressure. The transmission components, including a crankshaft, connecting rod, and eccentric slider, enable this reciprocating motion.

[0003] An air compressor compression mechanism, as described in announcement number CN108266349A, features a connecting rod designed with symmetrical ends. Both ends are fixedly connected to the pistons, and a slide rail in the middle allows the crankshaft to slide laterally. A needle roller bearing is installed between the crankshaft and the slide rail. When the air compressor operates, it drives the crankshaft to rotate. The rotating crankshaft causes the connecting rod to move linearly up and down, while the pistons, fixed to the upper and lower ends of the connecting rod, reciprocate within the cylinder, thus compressing air. However, this mechanism has a relatively small intake volume and slow airflow exchange rate within the crankcase, which can easily lead to increased temperature within the crankcase and affect the normal operation of the air compressor. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a transmission mechanism for an air compressor. The technical problem this invention aims to solve is how to reduce the temperature of the airflow within the crankcase and improve transmission efficiency.

[0005] The objective of this utility model can be achieved through the following technical solution: A transmission mechanism for an air compressor includes a crankcase with an internal cavity. A drive motor is fixedly connected to the crankcase. The drive motor includes a motor shaft, one end of which extends into the cavity. Cylinders are fixedly mounted on both sides of the crankcase perpendicular to the drive motor. Two eccentric wheels are fixedly connected to the motor shaft. Bearings are fixedly mounted on the outside of the two eccentric wheels. Connecting rods are fixedly mounted on the outside of the two bearings. A piston is fixedly connected to the end of the connecting rod away from the motor shaft. The piston is located inside the cylinder.

[0006] Furthermore, the eccentric wheel includes a fixed part, a mounting part, and a shaft fixing hole that passes through the fixed part and the mounting part. The shaft fixing hole is fixedly connected to the motor shaft. A bearing is fixedly sleeved on the mounting part. The fixed part and the mounting part perform eccentric movement around the axis of the shaft fixing hole.

[0007] Furthermore, the central axes of the two eccentric wheels are located on both sides of the axis of the shaft fixing hole.

[0008] Furthermore, the length of the mounting part is greater than the length of the bearing, the ends of the two mounting parts away from the fixing part abut against each other, one end of one fixing part abuts against the shoulder of the motor shaft, and one end of the other fixing part is fixedly connected to the fixing member.

[0009] Furthermore, the shaft fixing hole is circumferentially fixedly connected to the motor shaft via a keyway.

[0010] Furthermore, a flat key block protrudes from the shaft fixing hole toward the motor shaft, and shaft planes are symmetrically arranged on the motor shaft, with the flat key block fixedly engaged with the shaft planes.

[0011] Furthermore, the eccentric wheel is provided with at least one through hole on the side with the central axis, and the through hole penetrates the fixing part and the mounting part.

[0012] Furthermore, a valve seat is fixedly connected to the cylinder, a valve cover is fixedly connected to the valve seat, an intake valve and an outlet valve are provided on the valve seat, an air storage chamber is provided on the valve cover, an outlet hole is provided on the valve seat, and an intake air passage is provided on the crankcase, which is connected to the air storage chamber.

[0013] Compared with the prior art, the technical effect of this utility model is as follows: the motor shaft drives two pistons to move upward or downward at the same time. The two pistons can fill the cylinder with gas at the same time and also empty it at the same time, which greatly increases the air flow rate in and out of the air storage chamber, reduces the heat transfer rate between gases, and the rapid and large amount of exchange can remove the heat in the air compressor and achieve the cooling effect of the air compressor. Attached Figure Description

[0014] Figure 1 This is an exploded view of this utility model.

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] Figure 3 This is a stepped sectional view of the air compressor of this utility model.

[0017] Figure 4 This is a three-dimensional view of the eccentric wheel of this utility model.

[0018] Figure 5 This is the main view of the air compressor of this utility model.

[0019] Drawing number markings: 1. Crankcase; 101. Receiving cavity; 102. Intake air passage; 2. Drive motor; 201. Motor shaft; 2011. Shaft shoulder; 2012. Shaft plane; 3. Cylinder; 4. Bearing; 5. Eccentric wheel; 501. Fixing part; 502. Mounting part; 503. Shaft fixing hole; 504. Flat key block; 505. Through hole; 6. Connecting rod; 7. Piston; 8. Fixing part; 9. Valve seat; 901. Air outlet; 10. Valve cover; 1001. Air storage cavity; 11. Intake valve; 12. Outtake valve; 13. Case cover; 1301. Air inlet. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] according to Figures 1 to 3 As shown, a transmission mechanism for an air compressor includes a crankcase 1 with an internal receiving cavity 101. A drive motor 2 is fixedly connected to the crankcase 1. The drive motor 2 includes a motor shaft 201, one end of which extends into the receiving cavity 101. A cover 13 is fixedly connected to the crankcase 1, and the cover 13 has an air inlet 1301 communicating with the receiving cavity 101. The crankcase 1 also has two air inlet channels 102 communicating with an air storage cavity 1001, and the two air inlet channels 102 are arranged in opposite directions. Cylinders 3 are fixedly mounted on both sides of the crankcase 1, perpendicular to the drive motor 2. Pistons 7 are installed inside the cylinders 3. A valve seat 9 is fixedly connected to the cylinder 3, and a valve cover 10 is fixedly connected to the valve seat 9. An intake valve 11 and an outlet valve 12 are installed on the valve seat 9. The valve cover 10 has an air storage chamber 1001 that communicates with the receiving cavity 101. An outlet hole 901 that communicates with the air storage chamber 1001 is provided on the valve seat 9. Two intake air passages 102 are respectively connected to the air storage chamber 1001.

[0023] Two eccentric wheels 5 are fixedly connected to the motor shaft 201. Bearings 4 are fixedly fitted onto the outside of each eccentric wheel 5, and connecting rods 6 are fixedly fitted onto the outside of each bearing 4. A piston 7 is fixedly connected to the end of each connecting rod 6 away from the motor shaft 201, and the piston 7 is located inside the cylinder 3. Each eccentric wheel 5 includes a fixing part 501, a mounting part 502, and a shaft fixing hole 503 penetrating both the fixing part 501 and the mounting part 502. The shaft fixing hole 503 is fixedly connected to the motor shaft 201. Bearings 4 are fixedly fitted onto the outside of the mounting part 502. The fixing part 501 and the mounting part 502 perform eccentric movements around the axis of the shaft fixing hole 503. The eccentric wheel 5 is a T-shaped cylinder with its center as the central axis. The central axis is a certain distance from the axis of the shaft fixing hole 503, forming an eccentric structure. The central axes of the two eccentric wheels 5 are located on opposite sides of the axis of the shaft fixing hole 503. The length of the mounting part 502 is greater than the length of the bearing 4. The ends of the two mounting parts 502 away from the fixing part 501 abut against each other. One end of one fixing part 501 abuts against the shoulder 2011 of the motor shaft 201, and the other end of the fixing part 501 is fixedly connected to the fixing member 8. The fixing method between the shaft fixing hole 503 and the motor shaft 201 can be a keyway circumferential fixing connection, or a flat key block 504 protruding from the shaft fixing hole 503 toward the motor shaft 201. Shaft planes 2012 are symmetrically arranged on the motor shaft 201. The flat key block 504 is fixedly engaged with the shaft plane 2012 to restrict the circumferential movement of the eccentric wheel 5 and the motor shaft 201. The eccentric wheel 5 is provided with at least one through hole 505 on the side with the central axis. The through hole 505 passes through the fixing part 501 and the mounting part 502.

[0024] Working process: The rotation of the motor shaft 201 drives the two eccentric wheels 5 to rotate. The eccentric wheels 5 drive the pistons 7 on the connecting rod 6 to move up and down. When the motor shaft 201 rotates, the two pistons 7 move simultaneously towards the receiving cavity 101 until they reach the bottom of the stroke in the cylinder 3. At this time, the two cylinders 3 simultaneously draw in airflow from the receiving cavity 101 through the pistons 7. The airflow enters the cylinders 3 through the air inlet passage 102 and the air storage chamber 1001. As the motor shaft 201 continues to rotate, the two pistons 7 move simultaneously away from the receiving cavity 101 until they reach the top of the stroke in the cylinders 3. At this time, the airflow in the two cylinders 3 is delivered to the air outlet 901 through the air outlet valve 12 and the air storage chamber 1001. The two pistons 7 can simultaneously fill and empty the cylinders 3, greatly increasing the airflow in and out of the air storage chamber 1001, reducing the heat transfer rate between gases, and the rapid and large-volume exchange can remove the heat in the air compressor, achieving the cooling effect of the air compressor.

[0025] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A transmission mechanism for an air compressor, comprising a crankcase (1) having an internal receiving cavity (101), a drive motor (2) fixedly connected to the crankcase (1), the drive motor (2) including a motor shaft (201), one end of the motor shaft (201) extending into the receiving cavity (101), characterized in that: Cylinders (3) are fixedly installed on both sides of the crankcase (1) perpendicular to the drive motor (2). Two eccentric wheels (5) are fixedly connected to the motor shaft (201). Bearings (4) are fixedly sleeved on the outside of the two eccentric wheels (5). Connecting rods (6) are fixedly sleeved on the outside of the two bearings (4). A piston (7) is fixedly connected to the end of the connecting rod (6) away from the motor shaft (201). The piston (7) is located inside the cylinder (3).

2. The transmission mechanism of an air compressor according to claim 1, characterized in that: The eccentric wheel (5) includes a fixing part (501), a mounting part (502), and a shaft fixing hole (503) that passes through the fixing part (501) and the mounting part (502). The shaft fixing hole (503) is fixedly connected to the motor shaft (201). A bearing (4) is fixedly sleeved on the mounting part (502). The fixing part (501) and the mounting part (502) move eccentrically around the axis of the shaft fixing hole (503).

3. The transmission mechanism of an air compressor according to claim 2, characterized in that: The central axes of the two eccentric wheels (5) are located on both sides of the axis of the shaft fixing hole (503).

4. The transmission mechanism of an air compressor according to claim 3, characterized in that: The length of the mounting part (502) is greater than the length of the bearing (4). The ends of the two mounting parts (502) away from the fixing part (501) abut against each other. One end of the fixing part (501) abuts against the shoulder (2011) of the motor shaft (201), and one end of the other fixing part (501) is fixedly connected to the fixing member (8).

5. The transmission mechanism of an air compressor according to claim 2, characterized in that: The shaft fixing hole (503) and the motor shaft (201) are circumferentially fixedly connected by a keyway.

6. The transmission mechanism of an air compressor according to claim 2, characterized in that: The shaft fixing hole (503) has a flat key block (504) protruding towards the motor shaft (201), and the motor shaft (201) has symmetrical shaft planes (2012), with the flat key block (504) and the shaft plane (2012) fixedly engaged.

7. The transmission mechanism of an air compressor according to claim 2, characterized in that: The eccentric wheel (5) is provided with at least one through hole (505) on one side having a central axis, and the through hole (505) passes through the fixing part (501) and the mounting part (502).

8. A transmission mechanism for an air compressor according to any one of claims 1 to 7, characterized in that: A valve seat (9) is fixedly connected to the cylinder (3), and a valve cover (10) is fixedly connected to the valve seat (9). An intake valve (11) and an outlet valve (12) are provided on the valve seat (9). The valve cover (10) has an air storage chamber (1001) that communicates with the receiving cavity (101). An outlet hole (901) that communicates with the air storage chamber (1001) is provided on the valve seat (9). An intake air passage (102) that communicates with the air storage chamber (1001) is provided on the crankcase (1).

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