Air compressor

Abstract

An air compressor is characterized in that the air compressor comprises a machine shell, a main shaft, a fixed shaft, a piston and a swing disc, the main shaft is rotationally arranged on the machine shell, a connecting disc is formed at the front end of the main shaft, and the front end face of the connecting disc is concaved inwards to form a guide face; the front end of the fixed shaft is fixed in an inner cavity of the machine shell, the swing disc is located in the machine shell, the rear end of the swing disc is connected to the eccentric position of the connecting disc, and the front end of the swing disc is movably connected with the rear end of the fixed shaft. A plurality of shifting fork parts are formed in the circumferential direction of the swing disc, and each shifting fork part is connected with the corresponding piston and can drive the piston to move back and forth. In the rotating state of the spindle, the swing disc is driven to swing back and forth in the axial direction of the spindle, then the shifting fork part shifts the piston to move back and forth, and air compression is achieved. The fixed shaft does not need a bearing running fit structure, the arrangement is simple, no abrasion exists, the overall rotating friction is greatly reduced, the noise is also reduced, and the stability is greatly improved.

Description

Technical Field

[0001] This invention relates to an air compression device, and more particularly to an air compressor that can be used in vehicles and other similar applications. Background Technology

[0002] Existing plunger-type air compressors use a swashplate and piston that move back and forth, which presents the following problems: First, the sliding vanes on the piston engage with the swashplate, resulting in planar friction. Due to the linear velocity, this generates a significant amount of heat, leading to increased energy consumption. Second, the common use of lubricating oil for cooling, with its circulating flow, also increases energy consumption. Furthermore, the presence of oil molecules in the compressed air makes it impure, limiting its application. Relevant technical documents can be found in Chinese Utility Model Patent No. ZL201320166660.8, entitled "Improved Automotive Air Conditioning Compressor" (Authorization Announcement No. CN203161475U). Also relevant is Chinese Utility Model Patent No. ZL202220184972.0, entitled "A Fixed Displacement Swashplate Piston Compressor for Automotive Air Conditioning with an Oil Collection Groove" (Authorization Announcement No. CN216788661U).

[0003] To address this issue, the applicant has proposed an improved air compressor, as detailed in Chinese Invention Patent Application No. 202410792143.4, entitled "Air Compressor" (Publication No. CN118728688A). This application improves heat dissipation efficiency through a cooling fan and ventilation holes. While the heat dissipation effect is improved, the overall design is more complex and the cost is higher. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide an additional air compressor in view of the above-mentioned technical status quo.

[0005] The second technical problem to be solved by the present invention is to provide an air compressor with less wear and lower noise in view of the above-mentioned technical status quo.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an air compressor, characterized in that it includes a housing and has an air inlet and an air outlet;

[0007] The main shaft is rotatably mounted on the aforementioned housing, and a connecting plate is formed at the front end. The front end face of the connecting plate is concave to form a guide surface.

[0008] The fixed shaft is fixed at its front end to the aforementioned inner cavity of the housing.

[0009] Multiple pistons are laterally movable within the aforementioned housing and arranged around the main shaft; and

[0010] The swing disk is located inside the aforementioned housing and is connected at the rear end to the aforementioned connecting disk at an eccentric position, while its front end is movably connected to the rear end of the aforementioned fixed shaft. The aforementioned swing disk has multiple shift fork portions formed circumferentially, each shift fork portion being connected to a corresponding piston and capable of driving the piston to move back and forth.

[0011] When the main shaft is rotating, it drives the swing disk to swing back and forth along the axis of the main shaft, which in turn causes the shift fork to move the piston back and forth, thereby compressing the air.

[0012] The swing disk and the fixed shaft are preferably connected in the following way: the front end of the swing disk is recessed to form a connecting cavity, and the two sides of the connecting cavity are provided with first connecting channels. The rear end of the fixed shaft is formed with a connecting seat, and the two sides of the connecting seat are provided with second connecting channels. A universal joint is provided in the aforementioned connecting cavity and its four connecting ends are respectively connected to the aforementioned first connecting channel and second connecting channel.

[0013] Preferably, the housing may include, from front to back, a first cylinder head, a first cylinder block, a connecting cylinder, a second cylinder block, and a second cylinder head connected in sequence. The first cylinder block has a central through hole in the middle for the main shaft to pass through, and an outer peripheral through hole around the central through hole for the piston to move back and forth. The front and rear end faces of the connecting cylinder are respectively connected to the first cylinder block and the second cylinder block. The air inlet includes a first air inlet port and a second air inlet port, and the air outlet includes a first air outlet port and a second air outlet port. The first air inlet port and the first air outlet port are opened on the first cylinder head, and the second air inlet port and the second air outlet port are opened on the second cylinder head.

[0014] Furthermore, a first valve plate assembly for controlling the intake and exhaust is provided between the first cylinder head and the first cylinder block, and a second valve plate assembly for controlling the intake and exhaust is provided between the second cylinder head and the second cylinder block.

[0015] The first cylinder head has a tortuous first water flow channel and a water inlet port communicating with the first water flow channel. The first valve plate assembly has a tortuous second water flow channel. The first cylinder block, connecting cylinder, and second cylinder block have a first flow passage, a second flow passage, and a third flow passage formed therein. The second valve plate assembly has a tortuous third water flow channel. The second cylinder head has a tortuous fourth water flow channel and a water outlet port communicating with the fourth water flow channel. The aforementioned first water flow channel, second water flow channel, first flow passage, second flow passage, third flow passage, third water flow channel, and fourth water flow channel are sequentially connected to form a cooling water channel. The cooling water channel can achieve rapid heat dissipation.

[0016] Furthermore, the inner wall of the connecting cylinder has multiple axially arranged guide grooves, and correspondingly, the outer wall of the piston is provided with a guide post that can guide and cooperate with the aforementioned guide grooves.

[0017] The fork portion has a first spherical groove on each of its front and rear end faces, and the piston includes...

[0018] The housing is cylindrical and axially hollow, with a groove in the middle for the fork to extend into;

[0019] The mounting base consists of two units located at both ends of the aforementioned housing, each mounting base having a second spherical groove at its inner end;

[0020] There are two connecting rod shafts, each mounted on its own mounting base. Each connecting rod shaft has a third spherical groove and a fourth spherical groove formed at both ends.

[0021] The spherical beads are in two groups of two, which are movably disposed between the first and third spherical grooves and the second and fourth spherical grooves, respectively.

[0022] The friction between the piston and the shift fork is point friction, not surface friction, resulting in low friction, low energy consumption, and low noise.

[0023] The connecting rod shaft has a hollow oil cavity and includes a first shaft portion and a second shaft portion that are connected and assembled to each other. The aforementioned third spherical groove is formed on the first shaft portion, and the aforementioned third spherical groove has a first oil hole communicating with the oil cavity. The aforementioned fourth spherical groove is formed on the second shaft portion, and the aforementioned fourth spherical groove has a second oil hole communicating with the oil cavity. The lubricating oil in the oil cavity can continuously lubricate the spherical beads through the first oil hole and the second oil hole.

[0024] Compared with the prior art, the advantages of the present invention are as follows: the front end of the swing disk is movably connected to the rear end of the fixed shaft, the rear end connecting disk is eccentrically connected, the main shaft and the fixed shaft are set separately, the main shaft rotates while the fixed shaft remains fixed, thus the length of the main shaft is greatly shortened, and the fixed shaft does not require a bearing rotation fit structure, which is simple to set up and has no wear. Therefore, only the rotating shaft part has rotational friction, the overall rotational friction is greatly reduced, the noise is also reduced, and the stability is greatly improved. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment.

[0026] Figure 2 This is a schematic diagram of the structure from another perspective of the embodiment.

[0027] Figure 3 for Figure 1 The exploded diagram.

[0028] Figure 4 for Figure 3 Enlarged assembly diagram of the central spindle and piston.

[0029] Figure 5 for Figure 4 A diagram showing the combination of the central spindle, the oscillating disk, and the fixed axis.

[0030] Figure 6 for Figure 5 The exploded diagram.

[0031] Figure 7 for Figure 5 A breakdown diagram from another perspective.

[0032] Figure 8 This is an enlarged view of the piston.

[0033] Figure 9 This is a three-dimensional sectional view of the piston.

[0034] Figure 10 This is an enlarged view of the connecting rod shaft.

[0035] Figure 11 for Figure 10 The exploded diagram.

[0036] Figure 12 for Figure 10 A structural diagram from another perspective.

[0037] Figure 13 for Figure 3 Exploded view of the second valve plate assembly. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] like Figures 1-6 As shown, the air compressor in this embodiment includes a housing 1, a main shaft 5, a fixed shaft 3, a piston 6, and a swing disk 4.

[0040] The housing 1 has an air inlet and an air outlet. In this embodiment, the housing 1 is symmetrically designed from front to back. Specifically, from front to back, it includes a first cylinder head 15, a first cylinder body 14, a connecting cylinder 13, a second cylinder body 12, and a second cylinder head 11 connected in sequence. The first cylinder body 14 has a central through hole 141 through which the main shaft 5 passes. Around the central through hole 141, there is an outer peripheral through hole 142 for the piston 6 to move back and forth. The front and rear end faces of the connecting cylinder 13 are connected to the first cylinder body 14 and the second cylinder body 12, respectively. The air inlet includes a first air inlet port 153 and a second air inlet port 113. The air outlet includes a first air outlet port 151 and a second air outlet port 111. The first air inlet port 153 and the first air outlet port 151 are opened on the first cylinder head 15, and the second air inlet port 113 and the second air outlet port 111 are opened on the second cylinder head 11.

[0041] In this embodiment, heat sinks can be provided on the outer periphery of the first cylinder head 15, the first cylinder body 14, the connecting cylinder 13, the second cylinder body 12, and the second cylinder head 11 to improve the heat dissipation effect.

[0042] A first valve plate assembly 2a for controlling the intake and exhaust is provided between the first cylinder head 15 and the first cylinder block 14, and a second valve plate assembly 2 for controlling the intake and exhaust is provided between the second cylinder head 11 and the second cylinder block 12.

[0043] The first cylinder head 15 has a tortuous first water flow channel (not shown in the figure, but can be referred to as the second water flow channel 221) and a water inlet port 152 that communicates with the first water flow channel. Specifically, the first cylinder head 15 has a first cover plate 17 on the outside through a sealing gasket 171.

[0044] The first valve plate assembly 2a has a tortuous second water flow channel 221. The first cylinder body 14, the connecting cylinder 13, and the second cylinder body 12 have a first flow channel 143, a second flow channel 131, and a third flow channel 121 formed on them.

[0045] The second valve plate assembly 2 has a tortuous third water flow channel 221, specifically, in conjunction with Figure 13 As shown, the second valve plate assembly 2 is assembled from a front plate 22 and a rear plate 21, and the front plate 22 has a third water flow channel 221 on the side near the rear plate 21.

[0046] The second cylinder head 11 has a tortuous fourth water flow channel 11a and a water outlet 112 communicating with the fourth water flow channel 11a. Specifically, the second cylinder head 11 has a second cover plate 16 on the outside through a sealing gasket 161.

[0047] The first water flow channel, the second water flow channel 21a, the first overflow channel 143, the second overflow channel 131, the third overflow channel 121, the third water flow channel 221, and the fourth water flow channel 11a are connected in sequence to form a cooling water channel.

[0048] The main shaft 5 is rotatably mounted on the housing 1 via bearings 71 and 72, and a connecting plate 51 is formed at the front end. The front end face of the connecting plate 51 is concave to form a guide surface 52; the front end of the fixed shaft 3 is fixed to the inner cavity of the housing 1.

[0049] There are six pistons 6, which are laterally movable inside the housing 1 and arranged around the main shaft 5; specifically, the first cylinder body 14 is provided with a first cylinder liner 14a, the second cylinder body 12 is provided with a second cylinder liner 12a, and the pistons 6 can move laterally back and forth between the first cylinder liner 14a and the second cylinder liner 12a.

[0050] The swing disk 4 is located inside the housing 1 and its rear end is rotatably connected to the eccentric position of the connecting disk 51 via the bearing 73. Its front end is movably connected to the rear end of the fixed shaft 3. The swing disk 4 has multiple shift fork parts 41 formed in the circumference. Each shift fork part 41 is connected to the corresponding piston 6 and can drive the piston 6 to move back and forth.

[0051] Combination Figure 7As shown, the front end of the swing disk 4 is recessed to form a connecting cavity 42. First connecting channels 43 are formed on opposite sides of the connecting cavity 42. A connecting seat 31 is formed at the rear end of the fixed shaft 3. Second connecting channels 32 are formed on opposite sides of the connecting seat 31. A universal joint 8 is disposed within the connecting cavity 42, and its four connecting ends are rotatably connected to the first connecting channels 43 and the second connecting channels 32, respectively. The first connecting channel 43 is positioned by connecting bolts 81.

[0052] Combination Figure 4 As shown, the inner wall of the connecting cylinder 13 has a plurality of axially arranged grooves 133, and the grooves 133 have guide grooves. Correspondingly, the outer wall of the piston 6 is provided with a guide post 6a that can cooperate with the guide groove.

[0053] Combination Figure 5 As shown, the front and rear end faces of the shift fork 41 are respectively provided with first spherical grooves 41a.

[0054] Combination Figure 8 and Figure 9 As shown, piston 6 includes housing 61, mounting base 62, connecting rod shaft 63 and ball bearing 10.

[0055] The housing 61 is cylindrical and axially hollow, with a groove 611 in the middle for the fork portion 41 to extend into; there are two mounting seats 62 respectively located at both ends of the housing 61, and each mounting seat 62 has a second spherical groove at its inner end. In this embodiment, the mounting seat 62 has a spherical bowl 621 at its inner end, and the second spherical groove is formed on the spherical bowl 621.

[0056] Each piston 6 is equipped with two connecting rod shafts 63, which are respectively arranged on their respective mounting seats 62. Each connecting rod shaft 63 has a third spherical groove 633 and a fourth spherical groove 635 formed at both ends.

[0057] The spherical beads 10 are in two sets, two in each set, and are movably disposed between the first spherical groove 41a and the third spherical groove 633, and between the second spherical groove and the fourth spherical groove 635, respectively. Specifically, the spherical beads 10 can be made of steel balls. In this way, the friction between the piston 6 and the shift fork 41 is point friction, rather than surface friction, resulting in low friction, low energy consumption, and low noise.

[0058] like Figure 10 , Figure 11 and Figure 12As shown, the connecting rod shaft 63 in this embodiment has a hollow oil cavity 63a and includes a first shaft portion 631 and a second shaft portion 632 that are connected and assembled with each other. Specifically, the first shaft portion 631 and the second shaft portion 632 can be assembled by threaded connection. A third spherical groove 633 is formed on the first shaft portion 631, and the third spherical groove 633 has a first oil hole 634 communicating with the oil cavity. A fourth spherical groove 635 is formed on the second shaft portion 632, and the fourth spherical groove 635 has a second oil hole 636 communicating with the oil cavity. The lubricating oil in the oil cavity 63a can continuously lubricate the spherical ball 10 through the first oil hole 634 and the second oil hole 636.

[0059] When the main shaft 5 is rotating, it drives the swing disk 4 to swing back and forth along the axis of the main shaft 5, which in turn causes the shift fork 41 to move the piston 6 back and forth, thereby achieving air compression.

Claims

1. An air compressor, characterized in that... include The housing (1) has an air inlet and an air outlet; The main shaft (5) is rotatably mounted on the aforementioned housing (1), and a connecting plate (51) is formed at the front end. The front end face of the connecting plate (51) is concave to form a guide surface (52). Fixed shaft (3), the front end of which is fixed to the inner cavity of the aforementioned housing (1), Pistons (6), multiple of them, are arranged in the aforementioned housing (1) and around the main shaft (5) in a laterally movable manner; as well as The swing disk (4) is located inside the aforementioned housing (1) and its rear end is connected to the eccentric position of the aforementioned connecting disk (51), and its front end is movably connected to the rear end of the aforementioned fixed shaft (3); the aforementioned swing disk (4) has a plurality of shift fork portions (41) formed in the circumference, each shift fork portion (41) being connected to the corresponding piston (6) and capable of driving the piston (6) to move back and forth. When the aforementioned main shaft (5) is rotating, it drives the swing disk (4) to swing back and forth along the axis of the main shaft (5), and then the shift fork (41) moves the piston (6) back and forth to achieve air compression.

2. The air compressor according to claim 1, characterized in that... The front end of the swing disk (4) is recessed to form a connecting cavity (42). The connecting cavity (42) has a first connecting channel (43) on its opposite sides. The rear end of the fixed shaft (3) has a connecting seat (31). The connecting seat (31) has a second connecting channel (32) on its opposite sides. A universal joint (8) is provided in the aforementioned connecting cavity (42) and its four connecting ends are rotatably connected to the aforementioned first connecting channel (43) and second connecting channel (32).

3. The air compressor according to claim 1, characterized in that... The housing (1) comprises, from front to back, a first cylinder head (15), a first cylinder body (14), a connecting cylinder (13), a second cylinder body (12), and a second cylinder head (11) connected in sequence. The first cylinder body (14) has a central through hole (141) through which the main shaft (5) passes, and an outer peripheral through hole (142) around the central through hole (141) for the piston (6) to move back and forth. The front and rear end faces of the connecting cylinder (13) are connected to the first cylinder body (14) and the second cylinder body (12) respectively. The air inlet includes a first air inlet port (153) and a second air inlet port (113). The air outlet includes a first air outlet port (151) and a second air outlet port (111). The first air inlet port (153) and the first air outlet port (151) are opened on the first cylinder head (15), and the second air inlet port (113) and the second air outlet port (111) are opened on the second cylinder head (11).

4. The air compressor according to claim 3, characterized in that... A first valve plate assembly (2a) for controlling the intake and exhaust is provided between the first cylinder head (15) and the first cylinder block (14), and a second valve plate assembly (2) for controlling the intake and exhaust is provided between the second cylinder head (11) and the second cylinder block (12).

5. The air compressor according to claim 4, characterized in that... The first cylinder head (15) has a tortuous first water flow channel and a water inlet port (152) communicating with the first water flow channel. The first valve plate assembly (2a) has a tortuous second water flow channel (221). The first cylinder body (14), the connecting cylinder (13), and the second cylinder body (12) have a first flow channel (143), a second flow channel (131), and a third flow channel (121). The second valve plate assembly (2) has a tortuous third water flow channel (221). The second cylinder head (11) has a tortuous fourth water flow channel (11a) and a water outlet port (112) communicating with the fourth water flow channel (11a). The aforementioned first water flow channel, second water flow channel (21a), first overflow channel (143), second overflow channel (131), third overflow channel (121), third water flow channel (221) and fourth water flow channel (11a) are connected in sequence to form a cooling water channel.

6. The air compressor according to claim 3, characterized in that... The inner wall of the connecting cylinder (13) has a plurality of axially arranged guide grooves, and correspondingly, the outer wall of the piston (6) is provided with a guide post (6a) that can guide and cooperate with the aforementioned guide grooves.

7. The air compressor according to claim 1, characterized in that... The fork portion (41) has a first spherical groove (41a) on its front and rear end faces respectively, and the piston (6) includes The housing (61) is cylindrical and axially hollow, with a groove (611) in the middle for the fork (41) to extend into; The mounting base (62) consists of two parts located at both ends of the aforementioned housing (61), and each mounting base (62) has a second spherical groove at its inner end; There are two connecting rod shafts (63), each mounted on its own mounting base (62). Each connecting rod shaft (63) has a third spherical groove (633) and a fourth spherical groove (635) formed at both ends. The spherical beads (10) are in two groups of two, which are movably disposed between the first spherical groove (41a) and the third spherical groove (633) and the second spherical groove and the fourth spherical groove (635).

8. The air compressor according to claim 7, characterized in that... The connecting rod shaft (63) has a hollow oil cavity and includes a first shaft portion (631) and a second shaft portion (632) that are connected and assembled with each other. The aforementioned third spherical groove (633) is formed on the first shaft portion (631), and the aforementioned third spherical groove (633) has a first oil hole (634) that communicates with the oil cavity. The aforementioned fourth spherical groove (635) is formed on the second shaft portion (632), and the aforementioned fourth spherical groove (635) has a second oil hole (636) that communicates with the oil cavity.

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