Aluminum extruded air compressor crankcase

Abstract

The utility model provides a kind of air compressor crankcase of aluminium extrusion forming, it is related to air compressor manufacturing field, including the box structure of integration molding by aluminium extrusion process, its inside is provided with bearing seat, the bearing seat will the inner portion of the box structure be divided into the first chamber for installing motor and the second chamber for installing piston assembly. The application is integrated in single component by aluminium extrusion integrated molding box and built-in bearing seat, motor cavity and piston cavity. This structure fundamentally eliminates the cumulative error of split assembly, ensures the high coaxiality of motor and crankshaft, so as to significantly improve structural rigidity, transmission accuracy and reliability, while simplifying mould, reducing processing procedure, effectively reduces manufacturing cost and weight.

Description

Technical Field

[0001] This utility model relates to the field of air compressor manufacturing, and in particular to an aluminum extrusion-formed air compressor crankcase. Background Technology

[0002] The crankcase of an air compressor is the core frame that houses the crankshaft, connecting rod, motor, and piston cylinder head. Its structural design and manufacturing process directly determine the performance, reliability, and manufacturing cost of the air compressor.

[0003] Currently, the publicly available air compressor crankcases mainly adopt a split casting structure, that is, the cavity for installing the motor and the cavity for installing the piston are manufactured independently by casting, and then assembled into one piece by connecting parts such as bolts and locating pins.

[0004] However, this traditional modular casting method has several problems. First, it requires the development and manufacture of two complex casting molds for each housing, and the casting process itself is prone to defects such as porosity and shrinkage, resulting in high mold costs and low blank yield. Second, the joining surfaces of the two independent housings require precision machining to ensure alignment accuracy. This not only increases the number of machining steps, time, and the cost of special fixtures, but also affects the coaxiality of the motor and crankshaft due to accumulated assembly errors, thus hindering the improvement of overall machine performance. In addition, the modular design also leads to a bulky overall structure and low material utilization. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by fundamentally solving the inherent defects of split-type housings through an integrated molded box structure and a dual-chamber design with internal bearing seats. This structure drastically reduces the number and complexity of molds, unifies the casting process, significantly lowers mold costs and blank prices, and substantially improves the blank yield. Simultaneously, the integrated structure eliminates the need for separate assembly, naturally simplifying machining processes, reducing machining allowances, lowering processing costs and time, and achieving low-cost, high-yield manufacturing.

[0006] In order to solve the above-mentioned technical problems, the present invention solves the problems caused by the split casting structure of traditional box structure through the following technical solution.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An aluminum extrusion-formed air compressor crankcase includes a housing structure integrally formed by an aluminum extrusion process, wherein a bearing housing is provided inside, and the bearing housing divides the interior of the housing structure into a first chamber for mounting a motor and a second chamber for mounting a piston assembly.

[0008] Preferably, the housing structure has a split cylinder head mounting hole and an oil pump mounting hole, which are located at corresponding positions at the end of the second chamber.

[0009] Preferably, the opening end of the first chamber is an inner hole, which is designed with critical interference fit to ensure the connection accuracy and connection strength between the motor stator and the crankcase.

[0010] Preferably, the outer wall of the box structure is integrally formed with a shock-absorbing bracket.

[0011] Preferably, the shock absorber bracket has a central oil storage hole on both sides.

[0012] Preferably, the outer side of the enclosure structure is provided with a plurality of heat dissipation fins, which are parallel to each other and spaced apart, so as to increase the heat dissipation area of ​​the enclosure structure.

[0013] Preferably, the outer periphery of the bearing housing is welded to the inner periphery of the housing structure.

[0014] Preferably, the bearing housing is provided with a crankshaft connecting rod hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The aluminum extrusion-formed air compressor crankcase provided in this application integrates the motor cavity and piston cavity into a single component through an integrated aluminum extrusion-formed housing and built-in bearing housing. This structure fundamentally eliminates the cumulative errors of separate assembly, ensures high coaxiality between the motor and crankshaft, thereby significantly improving structural rigidity, transmission accuracy, and reliability. At the same time, it simplifies molds, reduces processing steps, and effectively reduces manufacturing costs and weight. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the housing structure and the bearing seat separation structure of this utility model; Figure 3 This is a frontal cross-sectional view of the present invention. Figure 4 This is a bottom view of the structure of this utility model; Figure 5 This is a top view of the structure of this utility model; Figure 6 This is a schematic diagram of the right side view of the present invention.

[0018] Drawing number explanation: 1. Housing structure; 11. Heat dissipation fins; 2. Split cylinder head mounting hole; 3. Oil pump mounting hole; 4. Bearing seat; 40. Crankshaft connecting rod hole; 41. First chamber; 411. Inner hole; 42. Second chamber; 5. Vibration damping bracket; 51. Intermediate oil reservoir. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0021] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0022] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0023] Example: Please see Figure 1-6 An aluminum extrusion-formed air compressor crankshaft housing includes a housing structure 1 integrally formed by aluminum extrusion. An internal bearing seat 4 divides the housing structure 1 into a first chamber 41 for mounting a motor and a second chamber 42 for mounting a piston assembly. The key feature is that the housing structure 1 is integrally formed by aluminum extrusion. The housing structure 1 is clearly divided into two functionally defined chambers by a bearing seat 4. This integrated dual-chamber structure is the fundamental innovation of this invention, fundamentally replacing the complex structure of existing technologies that requires two separate housings to be joined together.

[0024] The opening of the first chamber 41 is designed as a precision inner bore 411. This inner bore 411 is formed by aluminum extrusion and employs a critical interference fit design. Specifically, its dimensions are precisely calculated and optimized so that the motor stator can be pressed into the inner bore 411 with an interference fit. This design ensures extremely high connection accuracy and strength between the motor stator and the housing structure 1, effectively solving the problem of coaxiality between the motor spindle and crankshaft caused by connection gaps and cumulative errors in traditional split structures. It is based on this solid connection foundation that the traditional air compressor coupling design is eliminated, and direct connection between the motor and crankshaft becomes possible, thereby improving the overall structural rigidity and load capacity of the air compressor.

[0025] At the end of the second chamber 42, a shock absorber bracket 5 is integrally formed on the outer wall of the housing structure 1. This shock absorber bracket 5 is the same length as the housing structure 1 and is formed synchronously during the aluminum extrusion process, creating a highly integrated support structure that effectively prevents the risk of shock absorber breakage or detachment under bumpy road conditions. The shock absorber bracket 5 has separate cylinder head mounting holes 2 and oil pump mounting holes 3 for mounting the air compressor cylinder head and oil pump, respectively. Furthermore, intermediate oil reservoir holes 51 are provided on both sides of the shock absorber bracket 5 to store lubricating oil and ensure continuous lubrication of moving parts.

[0026] To improve the heat dissipation performance of the housing, several heat dissipation fins 11 are integrally formed from aluminum extrusion on several exterior surfaces of the housing structure 1. These heat dissipation fins 11 are parallel to each other and spaced apart, which greatly increases the contact area between the housing and the air, thereby enhancing the heat dissipation effect of the air compressor during long-term operation.

[0027] The outer periphery of the bearing housing 4 is fixed to the inner peripheral wall of the housing structure 1 by welding. This method of welding the bearing housing 4 to the interior of the aluminum extrusion-formed housing structure 1 greatly simplifies the mold structure and reduces the difficulty, cost, and risk of mold manufacturing compared to casting the inner cavity. A crankshaft connecting rod hole 40 is provided on the bearing housing 4 for mounting the crankshaft and connecting rod mechanism, converting the rotational motion of the motor into the reciprocating linear motion of the piston.

[0028] Working principle The motor is fixed in the inner hole 411 of the first chamber 41, and its main shaft is mounted directly or via the crankshaft on the bearing housing 4. When the motor starts, its rotational power is directly transmitted to the crankshaft. The crankshaft rotates under the support of the bearing housing 4, and drives the piston located in the second chamber 42 to reciprocate through the connecting rod, thereby completing the air compression work.

[0029] Because the housing is made of extruded aluminum in one piece, the mounting base of the motor, the inner hole 411, and the crankshaft support bearing seat 4 all originate from the same extruded aluminum profile. This fundamentally ensures their coaxiality, eliminates the assembly errors caused by split housings, makes power transmission smoother and more efficient, and allows for the elimination of couplings. The one-piece molded shock-absorbing bracket 5 forms a rigid whole with the housing, which can evenly distribute the impact force from piston operation and road bumps throughout the housing, effectively avoiding the bracket breakage problem caused by stress concentration.

[0030] The oil pump is fixed through the oil pump mounting hole 3, pumping out the lubricating oil from the intermediate oil reservoir 51 or the oil sump at the bottom of the housing to provide pressure lubrication and splash lubrication for moving parts such as the crankshaft, connecting rod, and piston. At the same time, the piston generates heat by compressing air in the cylinder head, which is fixed through the split cylinder head mounting hole 2. The heat is conducted to the housing through the cylinder head and effectively dissipated into the air by the heat dissipation fins 11 on the outer wall of the housing, maintaining a stable operating temperature for the air compressor.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. An aluminum extruded air compressor crankcase characterized by, The housing structure (1) is integrally formed by aluminum extrusion process, and a bearing seat (4) is provided inside the housing structure (1). The bearing seat (4) divides the interior of the housing structure (1) into a first chamber (41) for installing a motor and a second chamber (42) for installing a piston assembly.

2. An aluminum extruded air compressor crankcase according to claim 1, characterized in that: The housing structure (1) is provided with a split cylinder head mounting hole (2) and an oil pump mounting hole (3), which are located at corresponding positions at the end of the second chamber (42).

3. An aluminum extruded air compressor crankcase as set forth in claim 1 wherein: The opening end of the first chamber (41) is an inner hole (411), which adopts a critical interference design to ensure the connection accuracy and connection strength between the motor stator and the crankcase.

4. An aluminum extruded air compressor crankcase as set forth in claim 1 wherein: The outer wall of the box structure (1) is integrally formed with a shock-absorbing bracket (5).

5. An aluminium extruded air compressor crankcase as claimed in claim 4 wherein: The shock absorber bracket (5) has a central oil storage hole (51) on both sides.

6. The aluminum extrusion-formed air compressor crankcase according to claim 1, characterized in that: The outer side of the box structure (1) is provided with a number of heat dissipation fins (11), and the multiple heat dissipation fins (11) are parallel to each other and spaced apart to increase the heat dissipation area of ​​the box structure (1).

7. The aluminum extrusion-formed air compressor crankcase according to claim 1, characterized in that: The outer periphery of the bearing housing (4) is welded to the inner periphery of the housing structure (1).

8. The aluminum extrusion-formed air compressor crankcase according to claim 1, characterized in that: The bearing housing (4) is provided with a crankshaft connecting rod hole (40).

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