Air compressor and automobile

Abstract

The utility model relates to the technical field of air compressors, in particular to an air compressor and an automobile. An air compressor comprises an integrated crankshaft structure. The integrated crankshaft structure comprises a crankshaft part and a straight shaft part, the crankshaft part comprises a first shaft section, a second shaft section, a third shaft section and a fourth shaft section, the axes of the first shaft section, the second shaft section, the third shaft section and the fourth shaft section are parallel, and the third shaft section and the low-pressure balance block are integrally formed; the straight shaft part and the fourth shaft section are integrally formed. The utility model solves the technical problem of how to reduce the number of connecting pieces used for connecting the crankshaft, the motor shaft and the low-pressure balance block in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to air compressor technology field especially relates to an air compressor and car. BACKGROUND

[0002] Air compressor (air compressor) is a kind of mechanical equipment that air is compressed into high-pressure gas, and is widely used in automobile engineering.

[0003] Patent document CN201822247374.X discloses a prior art air compressor structure;In the prior art, crankshaft, motor shaft, low-pressure balance block is the important component of air compressor, motor shaft rotates under the action of electric power, crankshaft is used to convert the rotary motion of motor input into the reciprocating linear motion of piston, and low-pressure balance block is used to balance the inertial force and torque of reciprocating linear motion of low-pressure piston connecting rod.

[0004] In the prior art, the crankshaft and the motor shaft are detachably connected, and the balance block and the crankshaft are also detachably connected, which causes the problems of too many connecting pieces and very troublesome assembly, and low assembly efficiency.

[0005] Therefore, the technical problem existing in the prior art is how to reduce the number of connecting pieces used for connecting the crankshaft, the motor shaft and the low-pressure balance block. UTILITY MODEL CONTENTS

[0006] In view of the technical problem of how to reduce the number of connecting pieces used for connecting the crankshaft, the motor shaft and the low-pressure balance block in the prior art, the utility model provides an air compressor and car.

[0007] The utility model realizes the following technical scheme:

[0008] An air compressor, comprising an integrated crankshaft structure;

[0009] The integrated crankshaft structure comprises a crankshaft part and a straight shaft part;

[0010] The crankshaft part comprises a first shaft section, a second shaft section, a third shaft section and a fourth shaft section, the first shaft section is used for mounting a high-pressure piston connecting rod assembly, the second shaft section is used for detachably connecting a high-pressure balance block, and the fourth shaft section is used for mounting a low-pressure piston connecting rod assembly;

[0011] The integrated crankshaft structure further comprises a low-pressure balance block, and the third shaft section is integrally formed with the low-pressure balance block;

[0012] The straight shaft part is integrally formed with the fourth shaft section, and the axis of the straight shaft part is parallel to the axis of the fourth shaft section, the straight shaft part is used for being connected with the rotor of the motor and being inserted into the magnetic field of the stator of the motor.

[0013] Further, the housing, the sealing cover and the oil seal are further included;

[0014] The straight shaft portion is provided with a widened portion in the radial direction, the sealing cover is provided with a first opening in the middle position, the widened portion is arranged in the first opening, and the gap between the widened portion and the first opening is sealed by the oil seal;

[0015] The edge of the sealing cover is in close contact with the inner wall of the housing, and the combination of the sealing cover, the oil seal and the widened portion divides the internal cavity of the housing into the motor cavity and the crankshaft cavity which are not communicated with each other.

[0016] Further, the motor cavity is fixedly provided with a stator, and the stator has a channel extending in a straight line;

[0017] Further, the motor cavity is fixedly provided with a stator, and the stator has a channel extending in a straight line;

[0018] Further, the motor cavity is fixedly provided with a stator, and the stator has a channel extending in a straight line;

[0019] The crankshaft portion further comprises a fifth shaft segment, and the fifth shaft segment is located between the second shaft segment and the third shaft segment;

[0020] Further, the motor cavity is fixedly provided with a stator, and the stator has a channel extending in a straight line;

[0021] Further, the combination of the low-pressure piston connecting rod assembly, the low-pressure balance block, the high-pressure piston connecting rod assembly, the high-pressure balance block and the crankshaft portion is arranged in the crankshaft cavity.

[0022] Further, the combination of the low-pressure piston connecting rod assembly, the low-pressure balance block, the high-pressure piston connecting rod assembly, the high-pressure balance block and the crankshaft portion is arranged in the crankshaft cavity.

[0023] Compared with the prior art, the utility model has the advantages that:

[0024] I. In the utility model, the crankshaft portion corresponds to the crankshaft in the prior art, the straight shaft portion corresponds to the motor shaft in the prior art, and the low-pressure balance block corresponds to the low-pressure balance block in the prior art; in the utility model, the fourth shaft segment of the crankshaft portion is integrally formed with the straight shaft portion, and the third shaft segment of the crankshaft portion is integrally formed with the low-pressure balance block, that is, in the utility model, the crankshaft portion, the straight shaft portion and the low-pressure balance block are integrally formed as a combination, and the three do not need to be connected by a connecting piece, such as a shaft coupling, a flat key, a spline, a screw or a bolt, therefore, the utility model solves the technical problem existing in the prior art, that is, how to reduce the number of connecting pieces used for connecting the crankshaft, the motor shaft and the low-pressure balance block.

[0025] II. The utility model discloses, reduced the connecting piece between crankshaft part, straight axle part, low pressure balance block three, saved the combination assembly process between three, improved the assembly efficiency of air compressor, and because saved the connecting piece between three, also avoided the problem that processing precision is difficult to match with assembly mode, also avoided the abrasion problem of connecting piece, and reduced the maintenance cost of later period maintenance, replacement connecting piece.

[0026] III. In the utility model, low pressure piston connecting rod assembly and fourth shaft section between, high pressure piston connecting rod assembly and first shaft section between, all need lubricating oil to carry out lubrication, the utility model discloses through sealing cover, oil seal, widen part divides the inside cavity of shell into motor chamber and crankshaft chamber that do not communicate with each other, avoided the lubricating oil in the crankshaft chamber to enter into motor chamber, causes the pollution of stator, rotor in motor chamber. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 It is the structure schematic diagram of the integrated crankshaft structure of the utility model;

[0028] Fig. 2 It is the structure section schematic diagram of the air compressor of the utility model.

[0029] Mark in drawing: crankshaft part (1), straight axle part (2), high pressure piston connecting rod assembly (3), high pressure balance block (4), low pressure piston connecting rod assembly (5), rotor (6), stator (7), shell (8), sealing cover (9), oil seal (10), widen part (11), first aperture (12), motor chamber (13), crankshaft chamber (14), right bearing hole (15), first bearing assembly (16), big bearing (17), fixed seat (18), low pressure balance block (19), first shaft section (101), second shaft section (102), third shaft section (103), fourth shaft section (104), fifth shaft section (105). DETAILED DESCRIPTION

[0030] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] Example 1

[0032] like Figs. 1-2 As shown, this embodiment proposes an air compressor, which includes an integrated crankshaft structure. The integrated crankshaft structure includes a crankshaft portion 1 and a straight shaft portion 2. The crankshaft portion 1 includes a first shaft segment 101, a second shaft segment 102, a third shaft segment 103, and a fourth shaft segment 104 with parallel axes. The first shaft segment 101 is used to install a high-pressure piston connecting rod assembly 3, the second shaft segment 102 is used to detachably connect a high-pressure balance block 4, and the fourth shaft segment 104 is used to install a low-pressure piston connecting rod assembly 5. The integrated crankshaft structure also includes a low-pressure balance block 19, and the third shaft segment 103 is integrally formed with the low-pressure balance block 19. The straight shaft portion 2 is integrally formed with the fourth shaft segment 104, and the axis of the straight shaft portion 2 is parallel to the axis of the fourth shaft segment 104. The straight shaft portion 2 is used to connect with the rotor 6 of a motor and is inserted into the magnetic field of the stator 7 of the motor.

[0033] In this embodiment, the high-pressure balance block 4 is used to balance the reciprocating inertial force and torque of the high-pressure piston connecting rod assembly 3; the low-pressure balance block 19 is used to balance the reciprocating inertial force and torque of the low-pressure piston connecting rod assembly 5.

[0034] The fourth shaft section 104 of the crankshaft part 1 is integrally formed with the straight shaft part 2, and the third shaft section 103 of the crankshaft part 1 is integrally formed with the low-pressure balance block 19. That is, the crankshaft part 1, the straight shaft part 2, and the low-pressure balance block 19 are integrally formed and can be processed by mold casting.

[0035] As can be known from the background art, the technical problem existing in the prior art is how to reduce the number of connecting pieces used for connecting the crankshaft, the motor shaft and the low-pressure balance block.

[0036] In the embodiment, the crankshaft part 1 corresponds to the crankshaft in the prior art, the straight shaft part 2 corresponds to the motor shaft in the prior art, and the low-pressure balance block 19 corresponds to the low-pressure balance block in the prior art. In the embodiment, the fourth shaft section 104 of the crankshaft part 1 is integrally formed with the straight shaft part 2, and the third shaft section 103 of the crankshaft part 1 is integrally formed with the low-pressure balance block 19. That is, in the embodiment, the crankshaft part 1, the straight shaft part 2 and the low-pressure balance block 19 are integrally formed as a combination, and the three parts do not need to be connected by connecting pieces such as a coupling, a key, a spline, a screw or a bolt. Therefore, the embodiment solves the technical problem existing in the prior art, that is, how to reduce the number of connecting pieces used for connecting the crankshaft, the motor shaft and the low-pressure balance block.

[0037] Further, in the embodiment, the connecting pieces between the crankshaft part 1, the straight shaft part 2 and the low-pressure balance block 19 are reduced, the assembly process of the combination between the three parts is omitted, the assembly efficiency of the air compressor is improved, the problem that the machining precision is difficult to match the assembly mode is avoided, the wear problem of the connecting pieces is avoided, and the maintenance cost of the later maintenance and replacement of the connecting pieces is reduced.

[0038] Further, the embodiment further includes the following technical solutions:

[0039] As shown in Figs. 1-2 , the air compressor further includes a housing 8, a sealing cover 9 and an oil seal 10. The straight shaft part 2 is provided with a widened part 11 in the radial direction. The sealing cover 9 is provided with a first opening 12 at the middle position. The widened part 11 is arranged in the first opening 12, and the gap between the widened part 11 and the first opening 12 is sealed by the oil seal 10. The edge of the sealing cover 9 is in close contact with the inner wall of the housing 8. The combination of the sealing cover 9, the oil seal 10 and the widened part 11 divides the internal cavity of the housing 8 into a motor cavity 13 and a crankshaft cavity 14 which are not communicated with each other.

[0040] The structure of the oil seal 10 can adopt one of the existing technologies, which is not limited herein, for example, the oil seal 10 in the embodiment is a sealing ring made of rubber.

[0041] Further specifically:

[0042] The motor cavity 13 is internally fixed with the stator 7, which has a straight channel; the rotor 6 is sleeved on the straight shaft part 2 and fixed therewith, and the straight shaft part 2 with the rotor 6 extends into the channel of the stator 7. The stator 7 is connected with the inner wall of the motor cavity 13, and the connection relationship adopts one of the prior art, which is not limited herein; the fixing of the rotor 6 with the straight shaft part 2 adopts one of the prior art, which is not limited herein.

[0043] and;

[0044] The end of the motor cavity 13 away from the crankshaft part 1 has a right bearing hole 15; the first bearing assembly 16 is further included, the end of the straight shaft part 2 away from the crankshaft part 1 is assembled with the right bearing hole 15 through the first bearing assembly 16; the crankshaft part 1 further includes a fifth shaft segment 105, which is located between the second shaft segment 102 and the third shaft segment 103; a large bearing 17 is further included, a fixed seat 18 is fixedly arranged in the crankshaft cavity 14, and the fifth shaft segment 105 is assembled with the fixed seat 18 through the large bearing 17.

[0045] The connection relationship between the crankshaft cavity 14 and the fixed seat 18 adopts one of the prior art, such as screw connection. In addition, the first bearing assembly 16 includes a first bearing and a gasket, and the end of the straight shaft part 2 away from the crankshaft part 1 is assembled with the right bearing hole 15 through the first bearing assembly 16. This part of the content is well known, and will not be repeated here.

[0046] In this embodiment, the shell 8 supports the integrated crankshaft structure and each component arranged on the integrated crankshaft structure through the large bearing 17 and the first bearing assembly 16.

[0047] The combination of the low-pressure piston connecting rod assembly 5, the low-pressure balance block 19, the high-pressure piston connecting rod assembly 3, the high-pressure balance block 4, and the crankshaft part 1 is arranged in the crankshaft cavity 14.

[0048] The low-pressure piston connecting rod assembly 5 includes a low-pressure piston connecting rod and a low-pressure bearing, and the assembly mode of the low-pressure piston connecting rod assembly 5 with the fourth shaft segment 104 is well known; the high-pressure piston connecting rod assembly 3 includes a high-pressure piston connecting rod and a high-pressure bearing, and the assembly mode of the high-pressure piston connecting rod assembly 3 with the first shaft segment 101 is well known.

[0049] In this embodiment, the low-pressure piston connecting rod assembly 5 and the fourth shaft segment 104, and the high-pressure piston connecting rod assembly 3 and the first shaft segment 101, all need to be lubricated by lubricating oil; in this embodiment, the internal cavity of the shell 8 is divided into the motor cavity 13 and the crankshaft cavity 14 which are not communicated with each other by the sealing cover 9, the oil seal 10, and the widened part 11, so as to avoid the lubricating oil in the crankshaft cavity 14 from entering the motor cavity 13 and polluting the stator 7 and the rotor 6 in the motor cavity 13.

[0050] Example 2

[0051] This embodiment proposes a car, which includes the air compressor mentioned in example 1.

[0052] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An air compressor characterized by, The integrated crankshaft structure comprises a crankshaft part (1) and a straight shaft part (2); The integrated crankshaft structure comprises a crankshaft part (1) and a straight shaft part (2); The crankshaft part (1) comprises a first shaft segment (101), a second shaft segment (102), a third shaft segment (103) and a fourth shaft segment (104) with their axes parallel to each other, the first shaft segment (101) is used for mounting a high-pressure piston connecting rod assembly (3), the second shaft segment (102) is used for detachably connecting a high-pressure balance block (4), and the fourth shaft segment (104) is used for mounting a low-pressure piston connecting rod assembly (5); The integrated crankshaft structure further comprises a low-pressure balance block (19), and the third shaft segment (103) is integrally formed with the low-pressure balance block (19); The straight shaft part (2) is integrally formed with the fourth shaft segment (104), and the axis of the straight shaft part (2) is parallel to the axis of the fourth shaft segment (104), the straight shaft part (2) is used for connecting with a rotor (6) of a motor and is inserted into a magnetic field of a stator (7) of the motor.

2. The air compressor of claim 1, wherein, Further comprising a housing (8), a sealing cover (9) and an oil seal (10); The straight shaft part (2) is provided with a widened part (11) in the radial direction, the middle position of the sealing cover (9) is provided with a first opening (12), the widened part (11) is arranged in the first opening (12), and the gap between the widened part (11) and the first opening (12) is sealed by the oil seal (10); The edge of the sealing cover (9) is in close contact with the inner wall of the housing (8); the combination of the sealing cover (9), the oil seal (10) and the widened part (11) divides the internal cavity of the housing (8) into a motor cavity (13) and a crankshaft cavity (14) which are not communicated with each other.

3. The air compressor of claim 2, wherein, The stator (7) is fixedly arranged in the motor cavity (13), and the stator (7) has a channel extending in a straight line; Further comprising a rotor (6), the rotor (6) is sleeved on the straight shaft part (2) and fixed with the straight shaft part (2), and the straight shaft part (2) with the rotor (6) extends into the channel of the stator (7).

4. The air compressor of claim 3, wherein, The end of the motor cavity (13) away from the crankshaft part (1) is provided with a right bearing hole (15); further comprising a first bearing assembly (16), the end of the straight shaft part (2) away from the crankshaft part (1) is assembled with the right bearing hole (15) through the first bearing assembly (16); The crankshaft part (1) further comprises a fifth shaft segment (105) located between the second shaft segment (102) and the third shaft segment (103); Further comprising a large bearing (17), a fixing seat (18) is fixedly arranged in the crankshaft cavity (14), and the fifth shaft segment (105) is assembled with the fixing seat (18) through the large bearing (17).

5. The air compressor of claim 4, wherein, The combination of the low-pressure piston connecting rod assembly (5), the low-pressure balance block (19), the high-pressure piston connecting rod assembly (3), the high-pressure balance block (4) and the crankshaft part (1) is arranged in the crankshaft cavity (14).

6. An automobile characterized by comprising: The air compressor comprises the air compressor of any one of claims 1-5. The air compressor comprises the air compressor of any one of claims 1-5.

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