CN116517808A - Eccentric piston connecting rod assembly and four-cylinder air compressor - Google Patents

Abstract

The invention discloses an eccentric piston connecting rod assembly and a four-cylinder compressor, which comprise a rotating shaft and four eccentric piston assemblies respectively sleeved on two ends of the rotating shaft, wherein the rotating shaft is formed by integrating a rotor rotating shaft part, two first eccentric rotating shaft parts and two second eccentric rotating shaft parts, the diameters of the rotor rotating shaft part, the first eccentric rotating shaft parts and the second eccentric rotating shaft parts are sequentially reduced, the two first eccentric rotating shaft parts are respectively positioned on two ends of the rotor rotating shaft part, the second eccentric rotating shaft parts are positioned at the outer ends of the first eccentric rotating shaft parts, the four eccentric piston assemblies are respectively sleeved on the two first eccentric rotating shaft parts and the two second eccentric rotating shaft parts, the rotor rotating shaft parts are directly arranged at the axle center of a stator, the transmission efficiency of the rotating shaft in a stepped manner is high, the energy loss in the transmission process is small, compared with the prior art, a gear box is removed, and the large cost is saved.

Description

An eccentric piston-rod assembly and a four-cylinder air compressor

technical field

The invention relates to the technical field of air compressors, in particular to an eccentric piston connecting rod assembly and a four-cylinder air compressor.

Background technique

An air compressor is a device used to compress gas. Air compressors are similar to water pumps in structure, and can be divided into three categories according to their working principles: volumetric type, power type (speed type or turbine type), and thermal type compressors; according to their performance, they can be divided into: low noise, variable frequency, explosion-proof Wait for the air compressor. Existing air compressors generally have 1 to 2 cylinders, the gas storage speed is seriously slow, which affects work efficiency, the machine is bulky, and transportation is inconvenient.

Later, the Chinese patent with the publication number CN110345043A discloses an eight-cylinder air compressor, which includes a biaxial motor. The biaxial motor includes a stator and rotor shafts arranged at both ends of the stator. The rotor shafts on both sides are respectively connected to gear boxes with the same structure; The gearbox includes a driving gear, a transmission gear and an output gear. The driving gear is fixed at the bottom of the gearbox and connected to the rotor shaft. The transmission gear is located in the middle of the gearbox and meshes with the driving gear. The two output gears are symmetrically arranged on the top of the gearbox. And respectively mesh with the transmission gear, the center of the output gear is pierced with an output shaft, and the two ends of the output shaft are respectively installed with eccentric wheels; above each eccentric wheel is correspondingly provided with a cylinder, the cylinder includes a cylinder box, a connecting rod piston and an eccentric wheel bearing, The top of the connecting rod piston is movable in the cylinder box, and the bottom of the connecting rod piston is connected with the eccentric wheel through the eccentric wheel bearing. It has the advantages of compact structure, easy transportation, high compression efficiency and working efficiency. However, this eight-cylinder air compressor contains a gear box, which has a complicated structure and high production cost.

Therefore those skilled in the art are devoted to developing a kind of simple in structure, compact eccentric piston connecting rod assembly and four-cylinder air compressor.

Contents of the invention

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a simple and compact eccentric piston-rod assembly and a four-cylinder air compressor.

In order to achieve the above object, the present invention provides an eccentric piston connecting rod assembly, which includes a rotating shaft and four eccentric piston assemblies respectively socketed in pairs at both ends of the rotating shaft. The rotation shaft part and the two second eccentric wheel shaft parts are integrally formed, the diameters of the rotor shaft part, the first eccentric wheel shaft part and the second eccentric wheel shaft part decrease successively, and the two first eccentric wheel shafts are located at both ends of the rotating shaft of the rotor, the rotating shaft of the second eccentric is located at the outer end of the rotating shaft of the first eccentric, and the four eccentric piston assemblies are respectively sleeved on the two first The eccentric wheel shaft portion and the two second eccentric wheel shaft portions.

Further, the eccentric piston assembly includes a piston, a connecting rod and an eccentric sleeve integrally formed from top to bottom, the eccentric sleeve is sleeved on an eccentric, and the eccentric is sleeved on the rotating shaft; An eccentric counterweight close to the eccentric piston assembly is sleeved on the rotating shaft.

Further, a piston apron is installed on the top of the piston.

Further, the front and back of the connecting rod are respectively provided with two parallel weight-reducing grooves sunken inward, and a reinforcing rib is arranged between the two weight-reducing grooves.

Further, the outer end of the second eccentric wheel shaft part is integrally extended with a fan shaft part, and the diameter of the fan shaft part is smaller than the diameter of the second eccentric wheel shaft part.

The present invention also provides a four-cylinder compressor, which includes the above-mentioned eccentric piston and connecting rod assembly, and also includes a stator, the rotating shaft of the rotor is inserted into the shaft center of the stator, and the piston of the eccentric piston assembly extends into a cylinder , the cylinder is installed in a cylinder accommodation structure, the eccentric piston assembly and the stator are installed in a housing, and the cylinder accommodation structure is installed on the top of the housing.

Further, the cylinder accommodating structure includes an air storage tank cover, a cylinder pressure plate, a first cylinder fixing frame and a second cylinder fixing frame installed sequentially from top to bottom, and the second cylinder fixing frame is installed on the casing the top of.

Further, the air storage box cover is provided with an air outlet hole and an air intake hole communicating with the outside world, and two sets of air intake valves and air outlet valves are installed on the cylinder pressure plate; between the air storage box cover and the cylinder pressure plate A cylinder sealing ring is provided, and both the air inlet valve and the air outlet valve communicate with the inside of the air storage box cover and the inside of the cylinder.

Further, the side surfaces of the first cylinder fixing frame and the second cylinder fixing frame are provided with through cooling holes.

Further, several cooling plates are installed on the top of the air tank cover.

Further, an air inlet muffler is arranged inside the air outlet.

The beneficial effect of the present invention is that: the eccentric piston connecting rod assembly and the four-cylinder compressor of the present invention include a rotating shaft and four eccentric piston assemblies respectively socketed in pairs at both ends of the rotating shaft. The rotation shaft part and the two second eccentric wheel shaft parts are integrally formed, the diameters of the rotor shaft part, the first eccentric wheel shaft part and the second eccentric wheel shaft part are successively reduced, and the two first eccentric wheel shaft parts are respectively located on the rotor The two ends of the shaft part, the second eccentric wheel shaft part is located at the outer end of the first eccentric wheel shaft part, and the four eccentric piston assemblies are respectively sleeved on the two first eccentric wheel shaft parts and the two second eccentric wheel shaft parts , the rotating shaft of the rotor is directly installed at the axial center of the stator, the transmission efficiency of the stepped rotating shaft is high, and the energy loss in the transmission process is small, and the eccentric piston assembly is directly driven by the motor. Compared with the prior art, the gear box is removed, saving energy greater cost.

Description of drawings

Fig. 1 is the structural representation of eccentric piston connecting rod assembly of the present invention;

Fig. 2 is a schematic structural view of the rotating shaft of the present invention;

Fig. 3 is a schematic structural view of a four-cylinder compressor of the present invention;

Fig. 4 is a structural representation of the gas tank cover of the present invention;

Fig. 5 is a structural side view of a four-cylinder compressor of the present invention;

Fig. 6 is a sectional view at A-A place in Fig. 5;

Fig. 7 is an exploded schematic diagram of the structure of the four-cylinder compressor of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or in a specific way construction and operation, therefore, should not be construed as limiting the invention. The terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

As shown in Fig. 1 and Fig. 2, an eccentric piston connecting rod assembly includes a rotating shaft 1 and four eccentric piston assemblies 2 respectively socketed at two ends of the rotating shaft 1. The rotating shaft 1 consists of a rotor rotating shaft part 11, Two first eccentric wheel shaft parts 12 and two second eccentric wheel shaft parts 13 are integrally formed, and the diameters of the rotor shaft part 11, the first eccentric wheel shaft part 12 and the second eccentric wheel shaft part 13 are successively reduced , the two first eccentric wheel shaft parts 12 are located at both ends of the rotor shaft part 11, the second eccentric wheel shaft parts 13 are located at the outer end of the first eccentric wheel shaft part 12, and the four The eccentric piston assembly is respectively sleeved on the two first eccentric wheel shaft parts 12 and the two second eccentric wheel shaft parts 13, the rotor shaft part is directly installed at the axial center of the stator, and the stepped rotating shaft The transmission efficiency is high, the energy loss in the transmission process is small, and the eccentric piston assembly is directly driven by the motor. Compared with the prior art, the gear box is removed, which saves a large cost.

In this embodiment, the eccentric piston assembly includes a piston 21 integrally formed from top to bottom, a connecting rod 22 and an eccentric wheel sleeve 23, and the eccentric wheel sleeve 23 is sleeved on an eccentric wheel 24, and the eccentric wheel 24 is socketed on the rotating shaft 1; the rotating shaft 1 is also socketed with an eccentric weight 25 next to the eccentric piston assembly, and the eccentric weight 25 is socketed on the same diameter as the adjacent eccentric piston assembly. On the rotating shaft of the eccentric wheel, ensure that the eccentric piston assembly can run smoothly.

The front and back sides of the connecting rod 22 are respectively provided with two parallel weight-reducing grooves 27 sunken inward, and a reinforcing rib 28 is arranged between the two weight-reducing grooves 27 to maintain the overall structure while reducing weight. strength.

The outer end of the second eccentric wheel shaft part 13 is also integrally extended with a fan shaft part 14, the diameter of the fan shaft part 14 is smaller than the diameter of the second eccentric wheel shaft part 13, and the fan shaft part 14 is used for installing The fan 4 cools the casing 7 and the lower end of the eccentric piston assembly 2 .

As shown in Figures 1 to 7, a four-cylinder compressor includes the above-mentioned eccentric piston connecting rod assembly, and also includes a stator 3, the rotor shaft part 11 is inserted into the axis of the stator 3, and the eccentric piston The piston 21 of the assembly 2 extends into a cylinder 5, the cylinder 5 is installed in a cylinder accommodation structure 6, the eccentric piston assembly 2 and the stator 3 are installed in a housing 7, and the cylinder accommodation structure 6 is installed On the top of the casing 7 , a piston apron 26 is installed on the top of the piston 21 , and the piston apron 26 is in sealing connection with the interior of the cylinder 5 .

In this embodiment, the cylinder accommodating structure 6 includes an air tank cover 61, a cylinder pressure plate 62, a first cylinder fixing frame 63 and a second cylinder fixing frame 64, which are sequentially stacked and installed from top to bottom. Cylinder fixing frame 64 is installed on the top of described casing 7, and the edge of described second cylinder fixing frame 64 is provided with several threaded holes 641, and described gas tank cover 61, cylinder pressure plate 62 and first cylinder fixing frame 63 respectively A first through hole 613, a second through hole 624 and a third through hole 631 coaxial with the threaded hole 641 are provided, and the threaded hole 641 is threaded to pass through the first through hole 613, the second through hole The bolts of the holes 614 and the third through holes 615; the top of the housing 7 is provided with a mounting groove 71, and the bottom of the second cylinder fixing frame 64 is provided with a fixing strip 642 embedded in the mounting groove 71 and interference fit; The casing 7 is assembled by the first fan cover 72, the first eccentric piston cover 73, the motor cover 74, the second eccentric piston cover 75 and the second fan cover 76 connected horizontally, which are also connected by bolt condensation; the whole The structure of the device is simple and convenient for disassembly and maintenance.

The air storage box cover 61 is provided with an air outlet hole 611 and an air inlet hole 612 communicating with the outside world, the air outlet hole 611 is provided with an air inlet muffler, and the cylinder pressure plate 62 is equipped with two groups of air inlet valves 621 and air outlet valves. Valve 623; a cylinder sealing ring 65 is provided between the air storage box cover 61 and the cylinder pressure plate 62, and an air storage chamber 616 is formed between the air storage box cover 61 and the cylinder pressure plate 62, and the inlet Both the air valve 621 and the air outlet valve 623 communicate with the interior of the air storage chamber 616 and the interior of the cylinder 5 .

In order to prolong the service life of the equipment and reduce the working temperature of the equipment, the sides of the first cylinder fixing frame 63 and the second cylinder fixing frame 64 are all provided with through cooling holes 66, and the cold air that enters from the cooling holes 66 has a cooling effect on the cylinder. 5 to carry out heat dissipation and cooling, and several cooling plates 67 are also installed on the top of the air storage box cover 61, and the cooling plates 67 carry out cooling and cooling to the air storage box cover 61, and the fan shaft part 14 is equipped with a fan 4, and the fan 4 is connected to the casing 7. and the lower end of the eccentric piston assembly 2 to cool down.

The working principle of the four-cylinder compressor of the present invention is: the stator 3 and the rotor shaft part 11 form a biaxial motor, and the biaxial motor simultaneously drives the eccentric piston assembly 2 located on both sides to run, and the biaxial motor drives the eccentric wheel 24 to rotate, and the eccentric The rotary motion of the wheel 24 brings the piston 21 and the connecting rod 22 to make a linear reciprocating motion in the cylinder 5, thereby generating compressed air and pushing it to the air storage chamber 616 through the switch of the air outlet valve 623 for storage, and finally discharged from the air inlet 612 when in use .

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (10)

1. The utility model provides an eccentric piston connecting rod assembly, includes pivot (1) and respectively two liang cup joints four eccentric piston assemblies (2) at pivot (1) both ends, characterized in that: the rotating shaft (1) is formed by integrating a rotor rotating shaft part (11), two first eccentric rotating shaft parts (12) and two second eccentric rotating shaft parts (13), the diameters of the rotor rotating shaft part (11), the first eccentric rotating shaft parts (12) and the second eccentric rotating shaft parts (13) are sequentially reduced, the two first eccentric rotating shaft parts (12) are respectively positioned at two ends of the rotor rotating shaft part (11), the second eccentric rotating shaft parts (13) are positioned at the outer ends of the first eccentric rotating shaft parts (12), and the four eccentric piston assemblies are respectively sleeved on the two first eccentric rotating shaft parts (12) and the two second eccentric rotating shaft parts (13).

2. The eccentric piston connecting rod assembly as in claim 1 wherein: the eccentric piston assembly comprises a piston (21), a connecting rod (22) and an eccentric wheel sleeve (23) which are integrally formed from top to bottom, the eccentric wheel sleeve (23) is sleeved on an eccentric wheel (24), and the eccentric wheel (24) is sleeved on the rotating shaft (1); and the rotating shaft (1) is also sleeved with an eccentric balancing weight (25) which is close to the eccentric piston assembly.

3. The eccentric piston connecting rod assembly as in claim 2 wherein: a piston apron (26) is also arranged at the top of the piston (21).

4. The eccentric piston connecting rod assembly as in claim 2 wherein: the front and back sides of the connecting rod (22) are respectively provided with two parallel weight reduction grooves (27) which are concave inwards, and reinforcing ribs (28) are arranged between the two weight reduction grooves (27).

5. The eccentric piston connecting rod assembly as in claim 1 wherein: the outer end of the second eccentric rotary shaft part (13) is also integrally extended with a fan rotary shaft part (14), and the diameter of the fan rotary shaft part (14) is smaller than that of the second eccentric rotary shaft part (13).

6. A four-cylinder compressor, characterized in that: the eccentric piston connecting rod assembly according to any one of claims 1 to 5, further comprising a stator (3), wherein the rotor rotating shaft part (11) is inserted into the axle center of the stator (3), a piston (21) of the eccentric piston assembly (2) stretches into a cylinder (5), the cylinder (5) is arranged in a cylinder accommodating structure (6), the eccentric piston assembly (2) and the stator (3) are arranged in a shell (7), and the cylinder accommodating structure (6) is arranged at the top of the shell (7).

7. The four-cylinder compressor according to claim 6, wherein: the cylinder accommodating structure (6) comprises a gas storage box cover (61), a cylinder pressing plate (62), a first cylinder fixing frame (63) and a second cylinder fixing frame (64) which are sequentially arranged in a stacked mode from top to bottom, and the second cylinder fixing frame (64) is arranged at the top of the shell (7).

8. The four-cylinder compressor according to claim 7, wherein: the gas storage box cover (61) is provided with a gas outlet hole (611) and a gas inlet hole (612) which are communicated with the outside, and the cylinder pressing plate (62) is provided with two groups of gas inlet valves (621) and gas outlet valves (623); and a cylinder sealing ring (65) is arranged between the gas storage box cover (61) and the cylinder pressing plate (62), and the gas inlet valve (621) and the gas outlet valve (623) are communicated with the inside of the gas storage box cover (61) and the inside of the cylinder (5).

9. The four-cylinder compressor according to claim 7, wherein: the side surfaces of the first cylinder fixing frame (63) and the second cylinder fixing frame (64) are respectively provided with a penetrating radiating hole (66).

10. The four-cylinder compressor according to claim 7, wherein: the top of the gas storage box cover (61) is also provided with a plurality of heat dissipation plates (67).