Eccentric mechanism of V-shaped four-cylinder air compressor

Abstract

The invention provides an eccentric mechanism of a V-shaped four-cylinder air compressor, and belongs to the technical field of air compressors. The problem that in an existing air compressor with the V-shaped included angle smaller than 90 degrees, the technical scheme used for balancing first-order reciprocating inertia force is complex is solved. According to the eccentric mechanism of the V-shaped air compressor, a first eccentric wheel and a second eccentric wheel are arranged at the front end of a motor shaft, a third eccentric wheel and a fourth eccentric wheel are arranged at the rear end of the motor shaft, the V-shaped included angle of the air compressor is 90 degrees, the second eccentric wheel reversely deflects by an angle beta relative to the first eccentric wheel in the rotating direction of the motor shaft, and the included angle theta formed by the third eccentric wheel and the first eccentric wheel is 180 degrees. The fourth eccentric wheel reversely deflects by an angle beta relative to the third eccentric wheel in the rotating direction of the motor shaft, and the angle beta is 90 degrees to the angle alpha. According to the structure, the weight of the air compressor is obviously reduced, the internal space of the crankcase is released, heat dissipation and cooling in the crankcase are facilitated, and the manufacturing cost of the air compressor is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of air compressors, and in particular relates to an eccentric mechanism of a V-type four-cylinder air compressor. Background Art

[0002] The existing single-sided two-cylinder air compressor or the two-sided four-cylinder air compressor includes a motor and a crankcase. The rotating shaft of the motor extends into the crankcase. Two eccentric wheels are arranged on the motor shaft in each crankcase. Two connecting rods are respectively mounted on the corresponding eccentric wheels. The angles of the two connecting rods are generally set at 90°. The motor shaft drives the eccentric wheel to rotate, thereby driving the two connecting rods to move to realize air compression. In order to reduce the size of the air compressor, the V-angle of some air compressors is set to 60° or any other angle less than 90°. It can be seen from the air compressor design manual that when the V-angle is 90°, the first-order reciprocating inertia force remains unchanged in magnitude, but its direction changes with the crank angle. This force can be completely balanced by the balancing block provided on the crankshaft crank; when the V-angle is not equal to 90°, the magnitude and direction of the first-order reciprocating inertia force are variable, and it cannot be completely balanced by the crankshaft balancing block provided on the crankshaft crank, resulting in greater vibration of the air compressor and shortening the service life of the wearing parts in the air compressor.

[0003] At present, the China Patent Network discloses a balancing device for the first-order reciprocating inertia force of a V-type air compressor [Authorization Announcement No.: CN204553163U]. The balancing device is suitable for balancing the first-order reciprocating inertia force of a V-type air compressor with a non-90° angle, and specifically includes a single-axis reverse balancing weight, a transmission gear, a driving gear, a crankshaft balancing weight, an air compressor crankshaft, a connecting rod component, and a piston component. A driving gear is arranged on the air compressor crankshaft, and the driving gear is meshed with the transmission gear. A single-axis reverse balancing weight is arranged on the transmission shaft of the transmission gear, a crankshaft balancing weight is arranged on the crank of the air compressor crankshaft, a connecting rod component is installed on the crankshaft, and the connecting rod component is connected to the piston component. The single-axis reverse balancing weight is composed of a balancing iron, a transmission gear, a driving gear, a crankshaft balancing weight, a connecting rod component, and a piston component. The air compressor is composed of a movable shaft, and a crankshaft balancing weight is arranged on the crank of the air compressor crankshaft. In addition to balancing the rotational unbalanced force of the air compressor crankshaft and connecting rod components, the crankshaft balancing weight works together with the uniaxial reverse balancing weight. The resultant force of the uniaxial reverse balancing weight and the crankshaft balancing weight balances each other in the horizontal direction, and balances the reciprocating inertia force of the connecting rod component and the piston component in the vertical direction. The size and direction of the reciprocating inertia force are determined according to the weight of the connecting rod component and the piston component; the size and direction of the rotational unbalanced force are calculated according to the unbalanced rotating mass of the air compressor crankshaft and the weight of the connecting rod component, and finally the size and initial phase of the uniaxial reverse balancing weight and the crankshaft balancing weight are determined to completely balance the first-order reciprocating inertia force of the V-type air compressor.

[0004] Although the above-mentioned balancing device can balance the first-order reciprocating inertia force of a V-type air compressor with a non-90° angle, the structure of the balancing device is complicated, and the balancing device needs to be arranged in the crankcase. The balancing device also generates heat during operation, causing the temperature inside the crankcase to rise. The balancing device needs to occupy a large space in the crankcase, making the space inside the crankcase very crowded, which is not conducive to the heat dissipation inside the crankcase. In addition, the weight of the entire air compressor is significantly increased, which is not conducive to the lightweight design of the air compressor and also increases the manufacturing cost of the air compressor. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose an eccentric mechanism for a V-type four-cylinder air compressor. The technical problem to be solved by the present invention is: how to solve the problem that the technical solution for balancing the first-order reciprocating inertia force in the existing V-type air compressor with an angle less than 90° is relatively complex.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] An eccentric mechanism of a V-type four-cylinder air compressor, the eccentric mechanism comprising a motor shaft, wherein the front end of the motor shaft is provided with an eccentric wheel 1 and an eccentric wheel 2, and the rear end is provided with an eccentric wheel 3 and an eccentric wheel 4. The front end of the V-type four-cylinder air compressor comprises a cylinder assembly 1 sleeved on the eccentric wheel 1 and a cylinder assembly 2 sleeved on the eccentric wheel 2, and the rear end comprises a cylinder assembly 3 sleeved on the eccentric wheel 3 and a cylinder assembly 4 sleeved on the eccentric wheel 4. The V-shaped angle formed by the cylinder assembly 1 and the cylinder assembly 2, and the V-shaped angle formed by the cylinder assembly 3 and the cylinder assembly 4 are both ∠α and less than 90°. It is characterized in that the eccentric wheel 2 is deflected ∠β in the opposite direction relative to the eccentric wheel 1 along the rotation direction of the motor shaft, the angle ∠θ formed by the eccentric wheel 3 and the eccentric wheel 1 is 180°, and the eccentric wheel 4 is deflected ∠β in the opposite direction relative to the eccentric wheel 3 along the rotation direction of the motor shaft.

[0008] ∠β=90°-∠α.

[0009] The structure of this air compressor is a single-sided double cylinder. The V-shaped angles at both ends of the air compressor are ∠α, and ∠α is less than 90°. This structure makes the angle between the two rows of cylinder assemblies on one side less than 90°. The structural arrangement of the two rows of cylinder assemblies on one side is relatively compact, which reduces the overall volume of the air compressor. When the motor shaft starts to rotate, the initial position of eccentric wheel one is that the connecting rod in cylinder assembly one extends outward to the limit position. Assuming that the initial position of eccentric wheel one is at 0° at this time, cylinder assembly one is in the limit working position, and the corresponding connecting rod in cylinder assembly two is in the half-stroke working position, the connecting rod in cylinder assembly three is in the inward retracted limit position, and the connecting rod in cylinder assembly four is also in the half-stroke working position. After the motor shaft drives eccentric wheel one to rotate, the cylinder assembly starts to work. When eccentric wheel one rotates 90°, eccentric wheel two also rotates 90°. Eccentric wheel two deflects ∠β relative to eccentric wheel one. When eccentric wheel two rotates 90°, it just drives cylinder The connecting rod in component two extends outward to the extreme position, that is, the cylinder component two is in the extreme working position; when the eccentric wheel one rotates 180°, the eccentric wheel three also rotates 180°, and the eccentric wheel three drives the connecting rod in the cylinder component three to extend outward to the extreme position, that is, the cylinder component three is in the extreme working position; when the eccentric wheel one rotates 270°, that is, the eccentric wheel four rotates another 90° at the extreme working position of the eccentric wheel three, because the eccentric wheel four is deflected by ∠β relative to the eccentric wheel three, the eccentric wheel four just drives the connecting rod in the cylinder component four to extend outward to the extreme position, that is, the cylinder component four is in the extreme working position; the eccentric wheel one rotates 360° and then returns to the starting position. This structure is aimed at the case where the angle between the two cylinder heads located at the same end is less than 90°. By changing the mutual assembly angle of the four eccentric wheels, that is, ∠β compensates for ∠α, so that cylinder component one works when the motor shaft is at 0°, cylinder component two works after the motor shaft rotates 90°, cylinder component three works after the motor shaft rotates 180°, cylinder component four works after the motor shaft rotates 270°, and cylinder component one works after the motor shaft rotates 360°, and so on and so forth. The first-order reciprocating inertia force is balanced, the vibration of the air compressor is effectively reduced, and the reliability of the air compressor is improved. This structure does not add an additional balancing structure, and significantly reduces the weight of the air compressor compared with the prior art. The internal space of the crankcase is released, which is beneficial to the heat dissipation and cooling inside the crankcase, thereby reducing the manufacturing cost of the air compressor.

[0010] In the above-mentioned eccentric mechanism of a V-type four-cylinder air compressor, a balancing eccentric block 1 is sleeved on the front end of the motor shaft, and a balancing eccentric block 2 is sleeved on the rear end of the motor shaft. When the cylinder assembly 1 is in the state of starting to inhale, the balancing eccentric block 1 faces the opposite direction of the cylinder assembly 1, and the balancing eccentric block 2 is arranged in the same direction as the cylinder assembly 3. When cylinder assembly 1 is in the state of starting to inhale and do work, the balancing eccentric block 1 is facing the opposite direction of cylinder assembly 1, balancing the inertial force of the inhalation work of cylinder assembly 1. When eccentric wheel 1 rotates 90°, cylinder assembly 2 is in the state of starting to inhale and do work, and the position to which the balancing eccentric block 1 is rotated is just facing the opposite direction of cylinder assembly 2, balancing the inertial force of the inhalation work of cylinder assembly 2; the balancing eccentric block 2 is arranged in the same direction as cylinder assembly 3. When eccentric wheel 1 rotates 180°, cylinder assembly 3 is in the state of starting to inhale and do work, and the position to which the balancing eccentric block 2 is rotated is just facing the opposite direction of cylinder assembly 3, balancing the inertial force of the inhalation work of cylinder assembly 3; when eccentric wheel 1 rotates 270°, cylinder assembly 4 is in the state of starting to inhale and do work, and the position to which the balancing eccentric block 2 is rotated is just facing the opposite direction of cylinder assembly 4, balancing the inertial force of the inhalation work of cylinder assembly 4.

[0011] In the above-mentioned eccentric mechanism of a V-type four-cylinder air compressor, the angle ∠γ formed by the balancing eccentric block 1 and the cylinder assembly 1 is

[0012] 180°≦∠γ≦180°+∠β,

[0013] The angle formed by the balancing eccentric block 2 and the cylinder assembly 3 is ∠δ,

[0014] 0°≦∠δ≦∠β.

[0015] The included angle ∠γ in this structure is designed so that when the motor shaft is at 0°, the balancing eccentric block 1 is basically oriented in the opposite direction of the cylinder assembly 1, that is, the balancing eccentric block 1 and the cylinder assembly 1 are approximately located in the same axial direction. When the eccentric wheel 1 rotates 90°, the balancing eccentric block 1 and the cylinder assembly 1 are approximately located in the same axial direction, which is beneficial to balancing the inertial force of the balancing eccentric block 1 when balancing the cylinder assembly 1 and the cylinder assembly 2 when they are doing air intake work; similarly, the setting of the included angle ∠γ is beneficial to balancing the inertial force of the balancing eccentric block 2 when balancing the cylinder assembly 3 and the cylinder assembly 4 when they are doing air intake work.

[0016] In the above-mentioned eccentric mechanism of a V-type four-cylinder air compressor, the eccentric wheel one, the eccentric wheel two, the eccentric wheel three and the eccentric wheel four are arranged in sequence from front to back, the cylinder assembly one and the cylinder assembly three are located on the same side, and the cylinder assembly two and the cylinder assembly four are located on the other side.

[0017] In the above-mentioned eccentric mechanism of a V-type four-cylinder air compressor, the cylinder assembly one includes a connecting rod one mounted on an eccentric wheel one, the cylinder assembly two includes a connecting rod two mounted on an eccentric wheel two, the cylinder assembly three includes a connecting rod three mounted on an eccentric wheel three, and the cylinder assembly four includes a connecting rod four mounted on an eccentric wheel four.

[0018] In the above-mentioned eccentric mechanism of a V-type four-cylinder air compressor, the connecting rod one and the connecting rod two are staggered front and back, and the connecting rod three and the connecting rod four are staggered front and back. The V-type four-cylinder air compressor includes a front crankcase and a rear crankcase, the front crankcase has a cylinder seat one and a cylinder seat two, and the rear crankcase has a cylinder seat three and a cylinder seat four. The cylinder seat one is arranged forward relative to the cylinder seat two, and the cylinder seat three is arranged forward relative to the cylinder seat four. The end of the connecting rod one extends into the cylinder seat one, the end of the connecting rod two extends into the cylinder seat two, the end of the connecting rod three extends into the cylinder seat three, and the end of the connecting rod four extends into the cylinder seat four.

[0019] Compared with the prior art, the eccentric mechanism of the V-type four-cylinder air compressor of the present invention has the following advantages: this structure is aimed at the case where the angle between the two cylinder heads located at the same end is less than 90°. By changing the mutual assembly angle of the four eccentric wheels, that is, ∠β compensates for ∠α, so that cylinder component one works when the motor shaft is at 0°, cylinder component two works after the motor shaft rotates 90°, cylinder component three works after the motor shaft rotates 180°, cylinder component four works after the motor shaft rotates 270°, and cylinder component one works after the motor shaft rotates 360°, and so on and so forth. The first-order reciprocating inertia force is balanced, the vibration of the air compressor is effectively reduced, and the reliability of the use of the air compressor is improved. This structure does not add an additional balancing structure, and significantly reduces the weight of the air compressor compared with the prior art. The internal space of the crankcase is released, which is beneficial to the heat dissipation and cooling inside the crankcase, and reduces the manufacturing cost of the air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 yes Figure 1 main view.

[0022] Figure 3 yes Figure 1 Rear view of.

[0023] Figure 4 It is a schematic diagram of a three-dimensional structure in which four eccentric wheels are installed on the motor shaft of the present invention.

[0024] Figure 5 yes Figure 4 main view.

[0025] Figure 6It is a positional relationship diagram of the eccentric wheel one and the eccentric wheel three of the present invention.

[0026] Figure 7 It is a position relationship diagram of the eccentric wheel three and the eccentric wheel four of the present invention.

[0027] Figure 8 It is a position relationship diagram of the cylinder assembly 1 and the balancing eccentric block 1 of the present invention.

[0028] Fig. 9 It is a position relationship diagram of the cylinder assembly three and the balanced eccentric block two of the present invention.

[0029] Fig.10 It is a top view of the complete air compressor of the present invention.

[0030] In the figure, 1. motor shaft; 2. eccentric wheel one; 3. eccentric wheel two; 4. eccentric wheel three; 5. eccentric wheel four; 6. cylinder assembly one; 60. connecting rod one; 7. cylinder assembly two; 70. connecting rod two; 8. cylinder assembly three; 80. connecting rod three; 9. cylinder assembly four; 90. connecting rod four; 10. front crankcase; 100. cylinder seat one; 101. cylinder seat two; 11. rear crankcase; 110. cylinder seat three; 111. cylinder seat four; 12. balancing eccentric block one; 13. balancing eccentric block two. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1 to Figure 7 As shown, the eccentric mechanism of the V-type four-cylinder air compressor includes a motor shaft 1. The front end of the motor shaft 1 is provided with an eccentric wheel 1 2 and an eccentric wheel 2 3, and the rear end is provided with an eccentric wheel 3 4 and an eccentric wheel 4 5. The eccentric wheel 1 2, the eccentric wheel 2 3, the eccentric wheel 3 4 and the eccentric wheel 4 5 are arranged in sequence from front to back. The front end of the V-type four-cylinder air compressor has a cylinder assembly 1 6 mounted on the eccentric wheel 1 2 and a cylinder assembly 2 7 mounted on the eccentric wheel 2 3, and the rear end has a cylinder assembly 3 8 mounted on the eccentric wheel 3 4 and a cylinder assembly 4 9 mounted on the eccentric wheel 4 5. The cylinder assembly 1 6 and the cylinder assembly 3 8 are both located on the same side, and the cylinder assembly 2 7 and the cylinder assembly 4 9 are both located on the other side. As shown Figure 2 and Figure 3As shown, the V-shaped angle formed by the cylinder assembly 1 6 and the cylinder assembly 2 7, and the V-shaped angle formed by the cylinder assembly 3 8 and the cylinder assembly 4 9 are all ∠α and less than 90°, the cylinder assembly 1 6 includes a connecting rod 1 60 sleeved on the eccentric wheel 1 2, the cylinder assembly 2 7 includes a connecting rod 2 70 sleeved on the eccentric wheel 2 3, the cylinder assembly 3 8 includes a connecting rod 3 80 sleeved on the eccentric wheel 3 4, and the cylinder assembly 4 9 includes a connecting rod 4 90 sleeved on the eccentric wheel 4 5. In order to facilitate the position setting of the two cylinder assemblies located at the same end, in this embodiment, ∠α is 70°.

[0033] like Figure 5 As shown, the eccentric wheel 2 3 is deflected in the opposite direction of the rotation direction of the motor shaft 1 by ∠β relative to the eccentric wheel 1 2, as shown in FIG. Figure 6 As shown, the angle ∠θ formed by the eccentric wheel 3 4 and the eccentric wheel 1 2 is 180°. Figure 7 As shown, the eccentric wheel 4 5 is deflected in the opposite direction of rotation of the motor shaft 1 by ∠β relative to the eccentric wheel 3 4.

[0034] ∠β=90°-∠α,

[0035] In this embodiment, ∠β is 20°.

[0036] The structure of the air compressor is a single-side double-cylinder structure, and the V-shaped angles at both ends of the air compressor are both ∠α, and ∠α is less than 90°. This structure makes the angle between the two rows of cylinder assemblies on one side less than 90°, and the structural arrangement of the two rows of cylinder assemblies on one side is relatively compact, reducing the overall volume of the air compressor. When the motor shaft 1 starts to rotate, the initial position of the eccentric wheel 2 is that the connecting rod 60 in the cylinder assembly 6 extends outward to the limit position. The limit working position in this embodiment is that the connecting rod extends outward to the limit position. When the motor shaft 1 rotates again, the connecting rod retracts inward to inhale. Assuming that the initial position of the eccentric wheel 2 is at 0° at this time, the cylinder assembly 6 is in the limit working position, and the corresponding connecting rod 2 70 in the cylinder assembly 2 7 is in the half-stroke working position, the connecting rod 3 80 in the cylinder assembly 3 8 is in the inward retracted to the limit position, and the connecting rod 4 90 in the cylinder assembly 4 9 is also in the half-stroke working position. After the motor shaft 1 drives the eccentric wheel 2 to rotate, the cylinder assembly 6 starts to retract inward to inhale. When the eccentric wheel 2 rotates 90°, the eccentric wheel 2 3 also rotates 90°. The eccentric wheel 2 3 is deflected ∠β relative to the eccentric wheel 2. In this embodiment The deflection is 20°. When the eccentric wheel 23 rotates 90°, it just drives the connecting rod 270 in the cylinder assembly 27 to extend outward to the limit position, that is, the cylinder assembly 27 is in the limit working position; when the eccentric wheel 12 rotates 180°, the eccentric wheel 34 also rotates 180°, and the eccentric wheel 34 drives the connecting rod 380 in the cylinder assembly 38 to extend outward to the limit position, that is, the cylinder assembly 38 is in the limit working position; when the eccentric wheel 12 rotates 270°, that is, the eccentric wheel 45 rotates another 90° at the limit working position of the eccentric wheel 34. Since the eccentric wheel 45 is deflected by ∠β relative to the eccentric wheel 34, the present embodiment is deflected by 20°, and the eccentric wheel 45 just drives the connecting rod 490 in the cylinder assembly 49 to extend outward to the limit position, that is, the cylinder assembly 49 is in the limit working position; the eccentric wheel 12 rotates 360° and returns to the starting position. This structure is aimed at the case where the angle between two rows of cylinder assemblies located at the same end is less than 90°. By changing the mutual assembly angle of the four eccentric wheels, that is, ∠β compensates for ∠α, so that cylinder assembly 1 6 works when the motor shaft is 0°, cylinder assembly 2 7 works after the motor shaft 1 rotates 90°, cylinder assembly 3 8 works after the motor shaft 1 rotates 180°, cylinder assembly 4 9 works after the motor shaft 1 rotates 270°, and cylinder assembly 1 works after the motor shaft rotates 360°. This cycle is repeated to balance the first-order reciprocating inertia force, effectively reduce the vibration of the air compressor, and improve the reliability of the air compressor. This structure does not add an additional balancing structure, and significantly reduces the weight of the air compressor compared with the prior art. The internal space of the crankcase is released, which is beneficial to the heat dissipation and cooling inside the crankcase, thereby reducing the manufacturing cost of the air compressor.

[0037] The front end of the motor shaft 1 is sleeved with a balancing eccentric block 12, and the rear end of the motor shaft 1 is sleeved with a balancing eccentric block 2 13. When the cylinder assembly 1 6 is in the state of starting to inhale, the balancing eccentric block 12 faces the opposite direction of the cylinder assembly 1 6, and the balancing eccentric block 2 13 is arranged in the same direction as the cylinder assembly 3 8. Figure 8 As shown, the included angle ∠γ formed by the balancing eccentric block 10 and the cylinder assembly 6 is

[0038] 180°≦∠γ≦180°+∠β,

[0039] In this embodiment, 180°≦∠γ≦210°. When ∠γ is greater than 180°, the balancing eccentric block 12 is deflected relative to the cylinder assembly 6. At this time, the balancing eccentric block 12 is deflected ∠β in the opposite direction relative to the cylinder assembly 6 along the rotation direction of the motor shaft 1. In this embodiment, the deflection is 20°.

[0040] like Fig. 9 As shown, the angle formed by the balancing eccentric block 2 13 and the cylinder assembly 3 8 is ∠δ.

[0041] 0°≦∠δ≦∠β,

[0042] In this embodiment, 0°≦∠γ≦20°, when ∠γ is greater than 0°, the balancing eccentric block 13 is deflected relative to the cylinder assembly 8. At this time, the balancing eccentric block 13 is deflected by ∠β relative to the cylinder assembly 8 along the rotation direction of the motor shaft 1, and the embodiment is a deflection of 20°.

[0043] When the cylinder assembly 1 6 is in the state of limit work, the balancing eccentric block 12 is facing the opposite direction of the cylinder assembly 1 6, balancing the inertia force of the cylinder assembly 1 6 when doing air suction work. When the eccentric wheel 1 rotates 90°, the cylinder assembly 2 7 is in the state of limit work, and the position to which the balancing eccentric block 12 rotates is just facing the opposite direction of the cylinder assembly 2 7, balancing the inertia force of the cylinder assembly 2 7 when doing air suction work. The balancing eccentric block 2 13 is set in the same direction as the cylinder assembly 3 8. After the eccentric wheel 2 rotates 180°, the cylinder assembly 3 8 is in a state of limit work. At this time, the position to which the balancing eccentric block 2 13 is rotated is just in the opposite direction of the cylinder assembly 3 8, balancing the inertial force of the cylinder assembly 3 8 when it inhales and does work; when the eccentric wheel 2 rotates 270°, the cylinder assembly 4 9 is in a state of limit work. At this time, the position to which the balancing eccentric block 2 13 is rotated is just in the opposite direction of the cylinder assembly 4 9, balancing the inertial force of the cylinder assembly 4 9 when it inhales and does work.

[0044] like Figure 1 and Fig.10As shown, connecting rod 1 60 and connecting rod 2 70 are staggered front to back, connecting rod 3 80 and connecting rod 4 90 are staggered front to back, and the V-type four-cylinder air compressor includes a front crankcase 10 and a rear crankcase 11, the front crankcase 10 has a cylinder seat 1 100 and a cylinder seat 2 101, the rear crankcase 11 has a cylinder seat 3 110 and a cylinder seat 4 111, the cylinder seat 100 is arranged forward relative to the cylinder seat 2 101, the cylinder seat 3 110 is arranged forward relative to the cylinder seat 4 111, the end of the connecting rod 1 60 extends into the cylinder seat 1, the end of the connecting rod 2 70 extends into the cylinder seat 2 101, the end of the connecting rod 3 80 extends into the cylinder seat 3 110, and the end of the connecting rod 4 90 extends into the cylinder seat 4 111. In this structure, connecting rod one 60 and connecting rod two 70 are staggered front and back, connecting rod three 80 and connecting rod four 90 are staggered front and back, and cylinder seat one 100, cylinder seat two 101, cylinder seat three 110 and cylinder seat four 111 also need to be adapted in position, so as to facilitate the corresponding installation of each connecting rod.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An eccentric mechanism of a V-type four-cylinder air compressor, the eccentric mechanism comprising a motor shaft (1), the front end of the motor shaft (1) being provided with an eccentric wheel 1 (2) and an eccentric wheel 2 (3), and the rear end being provided with an eccentric wheel 3 (4) and an eccentric wheel 4 (5), the front end of the V-type four-cylinder air compressor comprising a cylinder assembly 1 (6) sleeved on the eccentric wheel 1 (2) and a cylinder assembly 2 (7) sleeved on the eccentric wheel 2 (3), and the rear end comprising a cylinder assembly 3 (8) sleeved on the eccentric wheel 3 (4) and a cylinder assembly 4 (9) sleeved on the eccentric wheel 4 (5), the V-shaped angle formed by the cylinder assembly 1 (6) and the cylinder assembly 2 (7), and the V-shaped angle formed by the cylinder assembly 3 (8) and the cylinder assembly 4 (9) are both ∠α and less than 90°, characterized in that: The eccentric wheel 2 (3) is deflected by ∠β in the opposite direction of the rotation direction of the motor shaft (1) relative to the eccentric wheel 1 (2); the eccentric wheel 3 (4) and the eccentric wheel 1 (2) form an angle ∠θ of 180°; the eccentric wheel 4 (5) is deflected by ∠β in the opposite direction of the rotation direction of the motor shaft (1) relative to the eccentric wheel 3 (4); ∠β＝90°-∠α。 2. The eccentric mechanism of a V-type four-cylinder air compressor according to claim 1, characterized in that: The front end of the motor shaft (1) is sleeved with a balancing eccentric block 1 (12), and the rear end of the motor shaft (1) is sleeved with a balancing eccentric block 2 (13). When the cylinder assembly 1 (6) is in the state of starting to inhale, the balancing eccentric block 1 (12) faces the opposite direction of the cylinder assembly 1 (6), and the balancing eccentric block 2 (13) is arranged in the same direction as the cylinder assembly 3 (8).

3. The eccentric mechanism of a V-type four-cylinder air compressor according to claim 2, characterized in that: The angle ∠γ formed by the balancing eccentric block 1 (10) and the cylinder assembly 1 (6) is 180°≦∠γ≦180°+∠β, The angle formed by the balancing eccentric block 2 (11) and the cylinder assembly 3 (8) is ∠δ, 0°≦∠δ≦∠β.

4. The eccentric mechanism of a V-type four-cylinder air compressor according to any one of claims 1 to 3, characterized in that: The eccentric wheel one (2), the eccentric wheel two (3), the eccentric wheel three (4) and the eccentric wheel four (5) are arranged in sequence from front to back, the cylinder assembly one (6) and the cylinder assembly three (8) are both located on the same side, and the cylinder assembly two (7) and the cylinder assembly four (9) are both located on the other side.

5. The eccentric mechanism of a V-type four-cylinder air compressor according to claim 1, characterized in that: The cylinder assembly one (6) includes a connecting rod one (60) mounted on an eccentric wheel one (2), the cylinder assembly two (7) includes a connecting rod two (70) mounted on an eccentric wheel two (3), the cylinder assembly three (8) includes a connecting rod three (80) mounted on an eccentric wheel three (4), and the cylinder assembly four (9) includes a connecting rod four (90) mounted on an eccentric wheel four (5).

6. The eccentric mechanism of a V-type four-cylinder air compressor according to claim 5, characterized in that: The connecting rod 1 (60) and the connecting rod 2 (70) are staggered in front and back, the connecting rod 3 (80) and the connecting rod 4 (90) are staggered in front and back, the V-type four-cylinder air compressor includes a front crankcase (10) and a rear crankcase (11), the front crankcase (10) has a cylinder seat 1 (100) and a cylinder seat 2 (101), the rear crankcase (11) has a cylinder seat 3 (110) and a cylinder seat 4 (111), the cylinder The seat one (100) is arranged forwardly relative to the cylinder seat two (101), the cylinder seat three (110) is arranged forwardly relative to the cylinder seat four (111), the end of the connecting rod one (60) extends into the cylinder seat one, the end of the connecting rod two (70) extends into the cylinder seat two (101), the end of the connecting rod three (80) extends into the cylinder seat three (110), and the end of the connecting rod four (90) extends into the cylinder seat four (111).

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