Connecting rod mechanism of double-end eight-cylinder air compressor

Abstract

The utility model provides a connecting rod mechanism of a double-end eight-cylinder air compressor, and belongs to the technical field of air compressors. The air compressor solves the problems that when an existing air compressor works, vibration is large, noise is large, and the work efficiency is not high. The connecting rod mechanism of the double-end eight-cylinder air compressor comprises a main shaft, two first connecting rod assemblies, two second connecting rod assemblies, two third connecting rod assemblies and two fourth connecting rod assemblies, and the two first connecting rod assemblies and the two second connecting rod assemblies are distributed around the front end of the main shaft in a crossed mode. The two third connecting rod assemblies and the two fourth connecting rod assemblies are distributed in a crossed mode around the rear end of the main shaft, and after the main shaft rotates, the two first connecting rod assemblies, the two second connecting rod assemblies, the two third connecting rod assemblies and the two fourth connecting rod assemblies can extend outwards to the limiting positions or retract inwards to the limiting positions at four different rotating angles respectively. According to the structure, the vibration and noise of the whole machine during working are reduced, and the working efficiency of the air compressor is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of drive mechanism technology, and in particular to a linkage mechanism for a double-headed eight-cylinder air compressor. Background Technology

[0002] A single-head four-cylinder air compressor is a special type of air compressor. Its core feature is the design of using a single crankshaft to drive four cylinders. It achieves high-efficiency compression through the coordinated work of multiple cylinders. This structure is widely used in the industrial field and is especially suitable for scenarios that require high displacement, stable air pressure, and long-term continuous operation.

[0003] Currently, the China Patent Network discloses a four-cylinder air compressor [Authorization Announcement No.: CN216044239U], which includes a crankcase and four air compression components. The four air compression components are arranged around the crankcase axis, and the projections of the four air compression components along the crankcase axis do not overlap. When this four-cylinder air compressor is working, the four air compression components perform work sequentially when the crankshaft rotates 360°.

[0004] The aforementioned four-cylinder air compressor has the following defects: Since the four air compression components work in sequence, the four connecting rods move in different directions. This means that the main shaft needs to withstand shear forces in four different directions when it rotates, resulting in a large load on the main shaft, a short service life of the mechanical structure, and unbalanced movement of the four connecting rods, which leads to large vibration and noise in the air compressor. In addition, the four-cylinder air compressor only uses one end of the main shaft to work, leaving the other end idle, resulting in low working efficiency. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a connecting rod assembly for a dual-head eight-cylinder air compressor. The technical problem to be solved by this utility model is: how to solve the problems of large vibration, high noise, and low working efficiency of traditional four-cylinder air compressors during operation.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A linkage mechanism for a dual-head eight-cylinder air compressor includes a main shaft, two connecting rod assemblies 1 and 2, which are arranged in a crisscross pattern around the front end of the main shaft. The linkage mechanism further includes two connecting rod assemblies 3 and 4, which are arranged in a crisscross pattern around the rear end of the main shaft. Crank 1 and Crank 2 are mounted on the front end of the main shaft, and crank 3 and Crank 4 are mounted on the rear end. Crank 1 has two eccentric wheels 1 arranged symmetrically at 180°, crank 2 has two eccentric wheels 2 arranged at 180°, crank 3 has two eccentric wheels 3 arranged at 180°, and crank 4 has two eccentric wheels 4 arranged at 180°. The crank 2 rotates relative to crank 1 along the main shaft... The crank three deflects at an angle ∠α relative to the crank one along the main shaft at an angle ∠β, and the crank four deflects at an angle ∠θ relative to the crank one along the main shaft at an angle ∠θ. Two connecting rod assemblies 1 are respectively mounted on corresponding eccentric wheels 1, two connecting rod assemblies 2 are respectively mounted on corresponding eccentric wheels 2, two connecting rod assemblies 3 are respectively mounted on corresponding eccentric wheels 3, and two connecting rod assemblies 4 are respectively mounted on corresponding eccentric wheels 4. The two connecting rod assemblies 1, 2, 3, and 4 are all perpendicular to the main shaft axis and are opposite each other. When the main shaft rotates, the two connecting rod assemblies 1, 2, 3, and 4 will extend outward to their limit positions or retract inward to their limit positions at four different rotation angles.

[0008] When the air compressor is working, for example, in the initial state, the first connecting rod assembly extends outward to its limit position. After rotating a certain angle, the second connecting rod assembly extends outward to its limit position. After rotating a certain angle again, the third connecting rod assembly extends outward to its limit position. After rotating a certain angle again, the fourth connecting rod assembly extends outward to its limit position. After rotating a certain angle again, the first connecting rod assembly extends outward to its limit position again. At this time, the work sequence is connecting rod assembly 2, connecting rod assembly 3, connecting rod assembly 4, and connecting rod assembly 1. However, according to the settings of ∠α, ∠β, and ∠θ, any work sequence of connecting rod assembly 1, connecting rod assembly 2, connecting rod assembly 3, and connecting rod assembly 4 can be achieved. The design of this structure allows connecting rod assemblies one, two, three, and four to perform work in turn. During the rotation of the main shaft, because the two connecting rod assemblies one maintain central symmetry throughout their movement, and their inward and outward strokes are consistent, the two opposing forces generated by the two connecting rod assemblies one cancel each other out during their work. Similarly, the motion principles of the two connecting rod assemblies two, three, and four are consistent with those of the two connecting rod assemblies one, significantly absorbing… The shear force generated by the simultaneous operation of the four linkage assemblies indirectly weakens the shear force on the main bearing, optimizes the overall load-bearing logic, reduces the load on the main bearing, and extends the life of the mechanical structure. At the same time, the forces generated by each linkage assembly cancel each other out and achieve balance, which also reduces the vibration and noise of the entire machine. Furthermore, the need to install a counterweight on the main shaft eliminates the need for a counterweight to achieve force balance, making the overall weight of the air compressor lighter. In addition, after the main shaft rotates 360°, the air compressor performs work four times, which significantly improves the working efficiency of the air compressor.

[0009] In the linkage mechanism of the above-mentioned dual-head eight-cylinder air compressor, ∠α is 90°. When the two linkage assemblies 1 extend outward to their limit positions at the same time, the two linkage assemblies 2 retract inward to their limit positions at the same time. When the main shaft rotates 180°, the two linkage assemblies 2 extend outward to their limit positions at the same time, and the two linkage assemblies 1 retract inward to their limit positions at the same time.

[0010] In the linkage mechanism of the aforementioned dual-head eight-cylinder air compressor, ∠β is 270°. When the two linkage assemblies extend outward to their limit positions in one direction, and the main shaft rotates 90°, the two linkage assemblies extend outward to their limit positions in three directions.

[0011] In the linkage mechanism of the above-mentioned dual-head eight-cylinder air compressor, ∠θ is 0°. When the main shaft rotates to 270°, the two linkage assemblies extend to their limit positions. When the main shaft rotates to 360°, the two linkage assemblies extend outward to their limit positions again.

[0012] Compared with existing technologies, the linkage mechanism of this utility model applied to air compressors has the following advantages: The design of this structure greatly absorbs the shear force generated by the simultaneous work of four sets of linkage components, thereby indirectly weakening the linkage shear force on the main bearing, optimizing the unloading logic of the whole machine, reducing the load on the main bearing, and extending the service life of the mechanical structure. At the same time, the forces generated by each linkage component during operation cancel each other out and achieve balance, which also reduces the vibration and noise of the whole machine during operation. Furthermore, the counterweight block installed on the main shaft is eliminated, and the counterweight block is no longer needed to achieve force balance, making the overall weight of the air compressor lighter. In addition, after the main shaft rotates 360°, the air compressor performs work four times, which significantly improves the working efficiency of the air compressor. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the connecting rod assembly of this utility model assembled on the main shaft.

[0014] Figure 2 This is an exploded structural diagram of each crank and main shaft of this utility model.

[0015] Figure 3 This is a schematic diagram of the connecting rod assembly of this utility model extending outward to its limit position.

[0016] Figure 4 This is a schematic diagram showing the position of the second link assembly when the first link assembly of this utility model extends outward to its limit position.

[0017] Figure 5 This is a schematic diagram of the position of the connecting rod assembly three when the connecting rod assembly one of this utility model extends outward to its limit position.

[0018] Figure 6 This is a schematic diagram of the position of the fourth link assembly when the first link assembly of this utility model extends outward to its limit position.

[0019] In the diagram, 1 is the main shaft; 3 is the connecting rod assembly 1; 4 is the connecting rod assembly 2; 5 is the crank 1; 6 is the crank 2; 50 is the eccentric wheel 1; 60 is the eccentric wheel 2; 7 is the crank 3; 70 is the eccentric wheel 3; 8 is the crank 4; 80 is the eccentric wheel 4; 9 is the connecting rod assembly 3; and 10 is the connecting rod assembly 4. 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] like Figure 1As shown, the linkage mechanism of this dual-head eight-cylinder air compressor includes a main shaft 1, a motor 2 that drives the main shaft 1 to rotate, two linkage assemblies 3 and two linkage assemblies 4. The two linkage assemblies 3 and two linkage assemblies 4 are arranged in a cross pattern around the main shaft 1. The two linkage assemblies 3 are centrally symmetrical about the main shaft 1, and the two linkage assemblies 4 are centrally symmetrical about the main shaft 1.

[0022] like Figure 2 , Figure 3 and Figure 4 As shown, crank 1 5 and crank 2 6 are sleeved on the front end of the main shaft 1. Crank 1 5 includes two eccentric wheels 50, which are arranged at 180° with the main shaft 1 as the center. Crank 2 6 includes two eccentric wheels 60, which are arranged at 180° with the main shaft 1 as the center. Crank 2 6 is deflected by an angle ∠α relative to crank 1 5 along the rotation direction of the main shaft 1. Two connecting rod assemblies 3 are respectively sleeved on the corresponding eccentric wheels 50, and two connecting rod assemblies 4 are respectively sleeved on the corresponding eccentric wheels 60.

[0023] This linkage mechanism also includes two link assemblies 3 9 and two link assemblies 4 10. The two link assemblies 3 9 and two link assemblies 4 10 are arranged in a cross pattern around the main shaft 1. The two link assemblies 3 9 are arranged in a centrally symmetrical manner with the main shaft 1 as the center, and the two link assemblies 4 10 are arranged in a centrally symmetrical manner with the main shaft 1 as the center. The link assemblies 3 9 and 4 10 in this embodiment have the same structure as the link assemblies in embodiment 1. Crank 3 7 and crank 4 8 are fitted onto the rear end of main shaft 1. Crank 3 7 includes two eccentric wheels 3 70, which are set at 180° with respect to main shaft 1. Crank 4 8 includes two eccentric wheels 4 80, which are set at 180° with respect to main shaft 1. Crank 3 7 is deflected by an angle ∠β relative to crank 1 5 in the direction of rotation of main shaft 1, and crank 4 8 is deflected by an angle ∠θ relative to crank 1 5 in the direction of rotation of main shaft 1. Two connecting rod assemblies 3 9 are respectively fitted onto the two eccentric wheels 3 70, and two connecting rod assemblies 4 10 are respectively fitted onto the two eccentric wheels 4 80. When main shaft 1 rotates, the two connecting rod assemblies 1 3, 2 connecting rod assemblies 4, 3 connecting rod assemblies 9, and 4 connecting rod assemblies 10 extend outward to their limit positions at four different rotation angles. When the air compressor is working, for example, in the initial state, the first connecting rod assembly 3 extends outward to its limit position. After rotating a certain angle, the two second connecting rod assemblies 4 extend outward to their limit positions. After rotating a certain angle again, the two third connecting rod assemblies 9 extend outward to their limit positions. After rotating a certain angle again, the two fourth connecting rod assemblies 10 extend outward to their limit positions. After rotating a certain angle again, the first connecting rod assembly 3 extends outward to its limit position again. At this time, the work sequence is the second connecting rod assembly 4, the third connecting rod assembly 9, the fourth connecting rod assembly 10, and the first connecting rod assembly 3. However, according to the setting of ∠α, ∠β, and ∠θ, any work sequence of the first connecting rod assembly 3, the second connecting rod assembly 4, the third connecting rod assembly 9, and the fourth connecting rod assembly 10 can be realized, and is not limited to the work sequence exemplified in this embodiment.

[0024] Figure 3 The dashed line in the middle represents the axis of crankshaft 5. Figure 4 The bold dashed line in the diagram represents the axis of crank 5, and the thin dashed line represents the axis of crank 6. Figure 5 The bold dashed line in the diagram represents the axis of crankshaft 5, and the thin dashed line represents the axis of crankshaft 7. Figure 6 The bold dashed line in the diagram represents the axis of crankshaft 5, and the thin dashed line represents the axis of crankshaft 4 (17). Figure 6 The two axes in the figure coincide, as in this embodiment, such as Figures 2-6As shown, cranks 1 (5), 2 (6), 3 (7), and 4 (8) are arranged sequentially from front to back on the main shaft 1, with ∠α = 90°, ∠β = 270°, and ∠θ = 0°. Initially, the two connecting rod assemblies 1 (3) extend outward to their limit positions. After the main shaft rotates 90°, the two connecting rod assemblies 3 (9) extend outward to their limit positions. When the main shaft rotates 180°, the two connecting rod assemblies 2 (4) extend outward to their limit positions. When the main shaft rotates 270°, the two connecting rod assemblies 4 (10) extend outward to their limit positions. When the main shaft rotates 360°, the two connecting rod assemblies 1 (3) extend outward to their limit positions again, and this cycle repeats continuously. The working angle interval between the four cranks in this structure is 90 degrees. This is equivalent to the four cranks taking turns performing work at 90-degree intervals for one revolution of the main shaft. This distributes the load on the motor evenly, making the upper limit of the motor load curve as close as possible to the lower limit of the no-load curve, thus optimizing energy consumption and reducing motor vibration and noise. Since the working sequence of the entire machine is crank 1 (5), crank 3 (7), crank 2 (6), and crank 4 (8), viewed laterally, the machine's work alternates between left and right. Mechanically, the distance from crank 1 (5) to crank 3 (7) is equal to the distance from crank 2 (6) to crank 4 (9). Under this condition, the shear force on the main shaft 1 is infinitely close during each work switch. This makes the overall vibration upper and lower limits and the impact forces on each component infinitely close, optimizing the machine's load-bearing capacity and extending the lifespan of the mechanical structure.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A linkage mechanism for a dual-head eight-cylinder air compressor, comprising a main shaft (1), two first linkage assemblies (3) and two second linkage assemblies (4), wherein the two first linkage assemblies (3) and the two second linkage assemblies (4) are arranged in a crisscross pattern around the front end of the main shaft (1), characterized in that, This linkage mechanism also includes two linkage assemblies three (9) and two linkage assemblies four (10), which are arranged in a crisscross pattern around the rear end of the main shaft (1). The front end of the main shaft (1) is fitted with crank one (5) and crank two (6), and the rear end of the main shaft (1) is fitted with crank three (7) and crank four (8). Crank one (5) has two eccentric wheels one (50) arranged at 180°. The second crank (6) has two eccentric wheels (60) arranged at 180°, the third crank (7) has two eccentric wheels (70) arranged at 180°, and the fourth crank (8) has two eccentric wheels (80) arranged at 180°. The second crank (6) is deflected by an angle ∠α relative to the first crank (5) along the rotation direction of the main shaft (1), and the third crank (7) is deflected by an angle ∠α relative to the first crank (5) along the rotation direction of the main shaft (1). The crank four (8) deflects relative to the crank one (5) along the rotation direction of the main shaft (1) by an angle ∠β. The two connecting rod assemblies one (3) are respectively mounted on the corresponding eccentric wheel one (50), the two connecting rod assemblies two (4) are respectively mounted on the corresponding eccentric wheel two (60), the two connecting rod assemblies three (9) are respectively mounted on the corresponding eccentric wheel three (70), and the two connecting rod assemblies four (10) are respectively mounted on the corresponding eccentric wheel four (80). The two connecting rod assemblies one (3), two connecting rod assemblies two (4), two connecting rod assemblies three (9) and two connecting rod assemblies four (10) are all perpendicular to the axis of the main shaft (1) and are opposite each other. When the main shaft (1) rotates, the two connecting rod assemblies one (3), two connecting rod assemblies two (4), two connecting rod assemblies three (9) and two connecting rod assemblies four (10) will extend outward to the limit position or retract inward to the limit position at four different rotation angles.

2. The linkage mechanism of a double-headed eight-cylinder air compressor according to claim 1, characterized in that, The ∠α is 90°. When the two connecting rod assemblies (3) extend outward to their limit positions at the same time, the two connecting rod assemblies (4) retract inward to their limit positions at the same time. When the main shaft (1) rotates 180°, the two connecting rod assemblies (4) extend outward to their limit positions at the same time, and the two connecting rod assemblies (3) retract inward to their limit positions at the same time.

3. The linkage mechanism of a double-headed eight-cylinder air compressor according to claim 2, characterized in that, The ∠β is 270°. When the two connecting rod assemblies one (3) extend outward to the limit position, the main shaft (1) rotates 90° and the two connecting rod assemblies three (9) extend outward to the limit position.

4. The linkage mechanism of a double-headed eight-cylinder air compressor according to claim 2 or 3, characterized in that, The ∠θ is 0°. When the main shaft (1) rotates to 270°, the two connecting rod assemblies four (10) extend to the limit position. When the main shaft (1) rotates to 360°, the two connecting rod assemblies one (3) extend to the limit position again.

Images