Air compressor housing, air compressor and air suspension system

Abstract

The utility model discloses an air compressor casing, air compressor and air suspension system, the air compressor casing includes: casing main part, the cavity of being formed in the cavity of casing main part inside, be equipped with at least one compression work area in the cavity, the nesting subassembly that includes with the bushing of corresponding compression work area number, the bushing sets up in compression work area, and the outer wall fixed embedding of bushing is in the inner wall of casing main part, the piston cavity is formed in the bushing inside hollow, the surface roughness of bushing inner wall is less than the surface roughness of casing main part inner wall. The air compressor casing of the application is through the nesting of the bushing of the surface roughness of casing main part inner wall is better, thereby optimizing the surface roughness of piston cavity, reduce the friction between piston and piston cavity, slow down the wearing and tearing of piston leather bowl and other vulnerable parts, and then prolong the service life of the air compressor made of the air compressor casing.

Description

Technical Field

[0001] This utility model relates to the field of air spring accessories, and in particular to an air compressor housing, an air compressor, and an air suspension system. Background Technology

[0002] The housing of an air compressor is the core structure that houses the piston assembly and compresses the gas. The piston chamber inside is the critical area for the piston's reciprocating motion, directly affecting the compressor's sealing performance, operational stability, and component lifespan. In existing technologies, air compressor housings are mostly integrally formed structures (such as integral aluminum housings), and the inner wall of the piston chamber requires treatment such as anodizing to meet surface roughness requirements. However, due to limitations in the housing material (such as the processing performance of ordinary aluminum), the surface roughness of the piston chamber inner wall after treatment is often difficult to meet the standards (e.g., Ra > 2μm). This leads to increased friction between the piston and the piston chamber, accelerated wear of vulnerable parts such as the piston cup, and consequently, shortened product lifespan, affecting the normal function of the air compressor. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an air compressor housing, an air compressor and an air suspension system, which can reduce the surface roughness of the piston cavity inside the air compressor housing, reduce wear and extend service life.

[0004] To solve the above-mentioned technical problems, this utility model provides an air compressor housing, the air compressor housing comprising: a housing body, the housing body having a hollow interior forming a receiving cavity, the receiving cavity having at least one compression working area; a nesting assembly including bushings corresponding to the number of compression working areas, the bushings being disposed within the compression working areas, and the outer wall of the bushings being fixedly embedded in the inner wall of the housing body, the bushings having a hollow interior forming a piston cavity; the surface roughness of the inner wall of the bushings being less than the surface roughness of the inner wall of the housing body.

[0005] In one feasible implementation, the outer wall of the bushing is provided with at least one annular protrusion extending circumferentially therein, and the inner wall of the housing body corresponding to the compression working area is provided with an annular groove adapted to the annular protrusion, and the annular protrusion is embedded in the annular groove to form a locking and fixing.

[0006] In one feasible implementation, the outer wall of the bushing is provided with at least two annular protrusions extending circumferentially thereon, the annular protrusions extending helically along the axial direction of the bushing.

[0007] In one feasible implementation, the pitch of the spirally extended annular protrusion is the same as the width of the annular protrusion.

[0008] In one feasible implementation, the height of the annular protrusion is 1-2 mm, and the width of the annular protrusion is 4-6 mm.

[0009] In one feasible implementation, the surface roughness Ra of the inner wall of the bushing is ≤2μm.

[0010] In one feasible implementation, the bushing has chamfers at both ends of its outer edge along the axial direction, with a chamfer angle of 45°-60° and a chamfer width of 1-2mm.

[0011] In one feasible implementation, the accommodating cavity has two compression working areas at both ends along the axial direction, and the nesting assembly includes two bushings, with one bushing nested in each of the compression working areas, and the inner diameters of the two bushings are 20mm and 50mm, respectively.

[0012] Accordingly, this application also provides an air compressor, including any of the aforementioned air compressor housings, an air tank, a piston assembly, and a motor for driving the piston assembly to pump air into the air tank. The air compressor housing is mounted on the air tank as an exhaust device.

[0013] Accordingly, this application also provides an air suspension system, including the aforementioned air compressor and an airbag, wherein the air compressor is used to inflate the airbag.

[0014] Implementing this utility model has the following beneficial effects: The air compressor housing provided in this application embodiment has a bushing with a better surface roughness nested inside the inner wall of the housing body. By controlling the surface roughness of the bushing, the surface roughness of the piston cavity can be controlled. This replaces the previously difficult-to-machine and controllable surface roughness of the air compressor housing inner wall with the simpler surface roughness of the bushing. This optimizes the surface roughness of the piston cavity, reduces friction between the piston and the piston cavity, slows down the wear of vulnerable parts such as the piston cup, and thus extends the service life of the air compressor made from this air compressor housing.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an air compressor housing shown in some embodiments of this application; Figure 2This is a cross-sectional view of the air compressor housing shown in some embodiments of this application; Figure 3 This is a three-dimensional structural schematic diagram of two bushings in an air compressor housing as shown in some embodiments of this application.

[0018] The reference numerals in the figure: 100 - Air compressor housing, 110 - Housing body, 120 - Nested assembly, 121 - First bushing, 122 - Second bushing, 1201 - Annular protrusion. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Please refer to Figures 1 to 3 This application provides an air compressor housing 100. The air compressor housing 100 includes a housing body 110 and a nesting assembly 120. The housing body 110 has a hollow interior forming a receiving cavity. The receiving cavity has two compression working areas. The nesting assembly 120 includes bushings corresponding to the number of compression working areas, i.e., two bushings (a first bushing 121 and a second bushing 122). One bushing is disposed within one compression working area. The outer wall of each bushing is fixedly embedded in the inner wall of the housing body 110. The bushing has a hollow interior forming a piston cavity. The surface roughness of the inner wall of the bushing is less than the surface roughness of the inner wall of the housing body 110. That is, the surface roughness of the inner wall of the piston cavity is the surface roughness of the bushing. Alternatively, by controlling the surface roughness of the bushing, the surface roughness of the piston cavity can be controlled, thereby replacing the difficult-to-process and controllable surface roughness of the inner wall of the air compressor housing 100 with the simple surface roughness of the bushing.

[0025] The air compressor housing 100 provided in this application optimizes the surface roughness of the piston cavity by nesting a bushing with better surface roughness inside the housing body 110 of the air compressor housing 100, thereby reducing the friction between the piston and the piston cavity, slowing down the wear of vulnerable parts such as piston cups, and thus extending the service life of the air compressor made from the air compressor housing 100.

[0026] Furthermore, the surface roughness Ra of the inner wall of the bushing is ≤2μm. This low-roughness inner wall significantly reduces the coefficient of friction in the piston cavity, decreases wear on the piston cup, and extends the service life of the piston cup. Simultaneously, the smooth inner wall of the bushing also helps improve the sealing performance of the piston cavity, reduces the risk of leakage, and increases air compression efficiency.

[0027] In one feasible implementation, the bushing may be provided with a standard circular annular protrusion (not shown in the figure) along the circumference of the outer wall of the bushing. The first and last ends of the standard circular annular protrusion are connected to form a complete ring (not shown in the figure). Of course, the corresponding housing body 110 is also provided with a pre-supported groove. In this way, the annular protrusion on the outer wall of the bushing and the annular groove of the housing body 110 are engaged and fixed, which enhances the connection strength between the bushing and the housing body 110, prevents the bushing from loosening or axially moving during long-term vibration, and improves the structural reliability. Furthermore, the number of standard circular annular protrusions can be determined according to the axial length of the specific bushing. Adjacent standard circular annular protrusions can be set at equal intervals to avoid stress concentration and improve the nesting connection strength between the bushing and the housing body 110.

[0028] Furthermore, please refer to the embodiments of this application. Figure 3 In this embodiment, the outer walls of the two bushings of the nested component 120, namely the first bushing 121 and the second bushing 122, are each provided with at least two annular protrusions 1201 extending circumferentially. The inner wall of the housing body 110 corresponding to the compression working area is provided with an annular groove adapted to the annular protrusions 1201, and the annular protrusions 1201 are embedded in the annular grooves to form a locking and fixing mechanism. Furthermore, the annular protrusions 1201 extend spirally along the axial direction of the bushing. Thus, compared to ordinary annular protrusions 1201, the cooperation between the spirally extending annular protrusions 1201 and the grooves increases the contact area and engagement length between the bushing and the housing body 110, further improving the connection strength and anti-loosening effect between the bushing and the housing body 110. In addition, the spiral structure can also guide the flow of material during injection molding or die casting, making the bond between the housing body 110 and the bushing tighter.

[0029] Furthermore, the inner diameters of the two bushings are 20mm (second bushing 122) and 50mm (first bushing 121), respectively. The first bushing 121 has an axial length of 24mm, and the second bushing 122 has an axial length of 20mm. The pitch of the spirally extending annular protrusion 1201 is the same as the width of the annular protrusion 1201. This ensures a uniform and continuous spiral structure, more balanced stress distribution, and avoids structural damage caused by localized stress concentration. Simultaneously, this structure facilitates the processing and forming of the bushings, which is beneficial for industrial production.

[0030] Furthermore, the width of the annular protrusions 1201 on both bushings is 4-6 mm. The width of the annular protrusions 1201 can be set according to the axial length of the bushing, ensuring that there are at least two annular protrusions 1201, which can play a better role in connection and fixation. At the same time, the width of 4-6 mm can improve the reliability of the engagement between the protrusion and the groove, further enhancing the connection strength and anti-loosening effect between the bushing and the housing body 110.

[0031] Furthermore, the height of the annular protrusion 1201 on the first bushing 121 and the second bushing 122 is 1-2 mm. In this way, while ensuring connection strength, it avoids the shell body 110 from being too thin or cracked due to excessive protrusion, thus balancing structural strength and material utilization.

[0032] Furthermore, in both bushings, the first bushing 121 and the second bushing 122, each bushing has a chamfer at both ends of its outer edge along the axial direction. The chamfer angle is 45°-60° and the chamfer width is 1-2mm. In this way, the chamfer can avoid stress concentration, further stabilize the connection between the bushing and the housing body 110, and ensure the overall stability of the air compressor operation.

[0033] In one feasible implementation, the accommodating cavity may contain only one compression working area, and the corresponding nested assembly 120 may consist of only one bushing (not shown in the figure). For example, a common single-cylinder air compressor compresses gas through the reciprocating motion of a single piston, and is used in applications such as small pneumatic tool drive devices. The specific structure will not be described in detail here. In summary, by nesting a bushing with a better surface roughness within the inner wall of the housing body 110 of the air compressor housing 100, the surface roughness of the piston cavity can be optimized, friction between the piston and the piston cavity can be reduced, wear on vulnerable parts such as the piston cup can be slowed down, and the service life of the air compressor can be extended.

[0034] The method for preparing the air compressor housing 100 provided in this application embodiment can be as follows: First, a bushing with corresponding dimensions and structure is machined using aerospace aluminum material according to parameters; then, the bushing is fixed in the casting mold of the die-cast air compressor housing 100; the housing body 110 is cast using molten aluminum, and the housing body 110 and the bushing are die-cast together, with the bushing nested inside the housing body 110 to form an integral air compressor housing 100. The air compressor housing 100 is then anodized and surface-hardened. After anodizing and surface-hardening, the surface roughness Ra of the inner wall of the aerospace aluminum bushing is ≤2μm.

[0035] Accordingly, this application also provides an air compressor. The air compressor includes any of the aforementioned air compressor housing 100. It also includes an air tank, a piston assembly, and a motor for driving the piston assembly to pump air into the air tank. The air compressor housing 100 is mounted on the air tank and serves as an exhaust device. The air compressor provided in this application has the corresponding advantages of the aforementioned air compressor housing 100, which will not be elaborated further here.

[0036] Accordingly, this application also provides an air suspension system. The air suspension system includes the aforementioned air compressor and an airbag, the air compressor being used to inflate the airbag. The air suspension system provided in this application has the corresponding advantages of the aforementioned air compressor housing 100 and air compressor, which will not be elaborated further here.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An air compressor housing, characterized in that, The air compressor housing includes: The housing body has a hollow interior forming a receiving cavity, and at least one compression working area is provided inside the receiving cavity; The nested component includes bushings corresponding to the number of compression working areas, the bushings being disposed within the compression working areas, and the outer wall of the bushings being fixedly embedded in the inner wall of the housing body, the interior of the bushings being hollow to form a piston cavity; The surface roughness of the inner wall of the bushing is less than that of the inner wall of the main body of the housing.

2. The air compressor housing according to claim 1, characterized in that, The outer wall of the bushing is provided with at least one annular protrusion extending circumferentially therein, and the inner wall of the housing body corresponding to the compression working area is provided with an annular groove adapted to the annular protrusion. The annular protrusion is embedded in the annular groove to form a locking and fixing.

3. The air compressor housing according to claim 2, characterized in that, The outer wall of the bushing is provided with at least two annular protrusions extending circumferentially thereon, and the annular protrusions extend spirally along the axial direction of the bushing.

4. The air compressor housing according to claim 3, characterized in that, The pitch of the spirally extending annular protrusion is the same as the width of the annular protrusion.

5. The air compressor housing according to claim 3, characterized in that, The height of the annular protrusion is 1-2 mm, and the width of the annular protrusion is 4-6 mm.

6. The air compressor housing according to claim 1, characterized in that, The surface roughness Ra of the inner wall of the bushing is ≤2μm.

7. The air compressor housing according to claim 1, characterized in that, The bushing has chamfers at both ends of its outer edge along the axial direction, with a chamfer angle of 45°-60° and a chamfer width of 1-2mm.

8. The air compressor housing according to any one of claims 1-7, characterized in that, The accommodating cavity has two compression working areas at both ends along the axial direction. The nesting assembly includes two bushings, with one bushing nested in each of the compression working areas. The inner diameters of the two bushings are 20mm and 50mm, respectively.

9. An air compressor, characterized in that: The compressor housing includes any one of the air compressor housings described in claims 1-8, and further includes an air tank, a piston assembly, and a motor for driving the piston assembly to pump air into the air tank. The air compressor housing is mounted on the air tank as an exhaust device.

10. An air suspension system, characterized in that: The system includes the air compressor as described in claim 9, and also includes an airbag, the air compressor being used to inflate the airbag.

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