Cylinder block of automobile air conditioner compressor

Abstract

The utility model relates to a cylinder block of an automobile air conditioner compressor. The engine comprises a front cover, a cylinder body, a rear cover and a bracket, the front cover is fixed at the front end of the cylinder body through a front bolt, and an O-shaped sealing ring is arranged between the front cover and the cylinder body; the rear cover is fixed at the rear end of the cylinder body through a rear bolt, and a valve plate and valve plate sealing gasket is arranged between the rear cover and the cylinder body; mounting angles are arranged at the front end and the rear end of the cylinder body, and the bracket is fixed between the mounting angles at the front end and the rear end of the cylinder body through penetrating bolts and nuts; the mounting corner is characterized in that the mounting corner is provided with an inner side mounting surface, and the inner side mounting surface comprises a pressure-bearing surface which is located in the middle and provided with a mounting hole and sinking surfaces located on the two sides of the pressure-bearing surface; and the bracket is in contact with the pressure-bearing surface when being mounted and fixed. According to the utility model, the fracture failure rate caused by overlarge stress of the mounting angle in order to make up the gap when the air-conditioning system bracket and the compressor mounting angle are assembled can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of automotive air-conditioning compressors, in particular to a cylinder block of an automotive air-conditioning compressor. Background Art

[0002] At present, with the development of China's economy and society and the improvement of people's living standards, the number of automobiles in the country is increasing, and people's requirements for the comfort of automobiles are also getting higher and higher. As the core component of the automotive air-conditioning system and the main component determining the refrigeration effect of the air-conditioning system, the compressor generally needs to have high reliability.

[0003] Most of the existing one-way compressors are used in construction machinery vehicles. When the hanging ear type compressor is installed, due to the excessive gap between the installation angle and the cast iron support member, the fracture failure caused by excessive force and deformation occurs. To reduce this failure, a cylinder block with a strengthened installation angle structure of an automotive air-conditioning compressor is developed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cylinder block of an automotive air-conditioning compressor, which mainly solves the technical problem that the existing hanging ear type compressor will have a fracture failure due to excessive force and deformation caused by the excessive gap between the installation angle and the cast iron support member during installation. The utility model can reduce the fracture failure rate caused by the excessive force of the installation angle to make up for the gap during the assembly of the air-conditioning system bracket and the compressor installation angle.

[0005] The technical solution of the utility model is as follows:

[0006] A cylinder block of an automotive air-conditioning compressor, which comprises a front cover, a cylinder block, a rear cover, and a bracket; the front cover is fixed to the front end of the cylinder block by front bolts, and an O-ring seal is provided between the front cover and the cylinder block; the rear cover is fixed to the rear end of the cylinder block by rear bolts, and a valve plate and valve sheet gasket is provided between the rear cover and the cylinder block; installation angles are arranged at both the front and rear ends of the cylinder block, and the bracket is fixed between the installation angles at the front and rear ends of the cylinder block through through bolts and nuts; the feature is that: the installation angle has an inner installation surface, and the inner installation surface includes a bearing surface with an installation hole in the middle and sunken surfaces on both sides of the bearing surface; when the bracket is installed and fixed, it contacts the bearing surface.

[0007] The cylinder block of the automotive air-conditioning compressor described above is characterized in that: the wall thickness of the cylinder block is 4.5 mm.

[0008] The cylinder block of the automotive air-conditioning compressor described above is characterized in that: after the bracket is assembled with the installation angle, there is a gap X, and X ≤ 0.2 mm.

[0009] The cylinder block of the automotive air-conditioning compressor described above is characterized in that: the number of installation angles at both the front and rear ends of the cylinder block is n, and 8 ≤ n ≤ 3.

[0010] For the cylinder block of the automotive air-conditioning compressor described above, it is characterized in that: the installation angles are symmetrically distributed on the circumferences of the front and rear ends of the cylinder block.

[0011] The utility model has the following characteristics:

[0012] 1. The installation angle of the cylinder block of the utility model has an inner installation surface, which includes a pressure-bearing surface with an installation hole in the middle and sunken surfaces on both sides of the pressure-bearing surface; when the bracket is installed and fixed, it contacts the pressure-bearing surface, and its contact area is local pressure-bearing compared with the installation angle in the prior art, and the contact area is significantly reduced, reducing the fracture failure rate caused by excessive force on the installation angle to compensate for the gap during the assembly of the air-conditioning system bracket and the compressor installation angle.

[0013] 2. The wall thickness of the cylinder block of the utility model is 4.5 mm, effectively reducing the overall cost of the compressor, and also further reducing the fracture failure rate caused by excessive force on the installation angle to compensate for the gap during the assembly of the air-conditioning system bracket and the compressor installation angle due to the reduction of the wall thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an assembly schematic diagram of a preferred embodiment of the cylinder block of the automotive air-conditioning compressor of the utility model.

[0015] Figure 2 is an assembly schematic diagram of the cylinder block of a preferred embodiment of the automotive air-conditioning compressor of the utility model with a bracket.

[0016] Figure 3 is a schematic diagram of the structure of the cylinder block of a preferred embodiment of the automotive air-conditioning compressor of the utility model.

[0017] Figure 4 is a schematic diagram of the structure of the cylinder block of the existing automotive air-conditioning compressor DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will describe the specific embodiments of the utility model with reference to the drawings.

[0019] Please refer to Figures 1-3, the present utility model discloses a cylinder block of an automotive air-conditioning compressor. As shown in the figure: It includes a front cover 1, a cylinder block 4, a rear cover 6, and a bracket 8; the front cover 1 is fixed to the front end of the cylinder block 4 by front bolts 2, and an O-ring seal 3 is provided between the front cover 1 and the cylinder block 4; the rear cover 6 is fixed to the rear end of the cylinder block 4 by rear bolts 7, and a valve plate and valve sheet gasket 5 is provided between the rear cover 6 and the cylinder block 4; both the front and rear ends of the cylinder block 4 are provided with mounting corners 41, and the bracket 8 is fixed between the mounting corners 41 at the front and rear ends of the cylinder block 4 through through bolts 9 and nuts 10; it is characterized in that: the mounting corner 41 has an inner mounting surface, and the inner mounting surface includes a bearing surface 412 with a mounting hole 411 in the middle and sunken surfaces 413 on both sides of the bearing surface 412; the bracket 8 contacts the bearing surface 412 when being installed and fixed.

[0020] In the present utility model, the number of mounting corners 41 at both the front and rear ends of the cylinder block 4 is n, and 8 ≤ n ≤ 3. The mounting corners 41 are symmetrically distributed on the circumferences at the front and rear ends of the cylinder block 4.

[0021] In the present utility model, as Figure 3 shown, the wall thickness of the cylinder block 4 is 4.5 mm. In the prior art, as Figure 4 shown, the wall thickness of its cylinder block 4 is 6 mm. Therefore, the present utility model effectively reduces the overall cost of the compressor.

[0022] Please refer to Figure 2 , after the bracket 8 is assembled with the mounting corner 41, there is a gap X, and X ≤ 0.2 mm. When the nut 10 is tightened, the mounting corner of the cylinder block 4 will be deformed due to force. When the size of the gap X is too large, the deformation of the mounting corner is large, and in severe cases, it will cause the mounting corner to break.

[0023] In the present utility model, as Figure 3 shown, the mounting corner 41 has an inner mounting surface, and the inner mounting surface includes a bearing surface 412 with a mounting hole 411 in the middle and sunken surfaces 413 on both sides of the bearing surface 412; the bracket 8 contacts the bearing surface 412 when being installed and fixed. In the prior art, as Figure 4 shown, the inner mounting surfaces of its mounting corners are all bearing surfaces. Thus, it can be seen that the contact area of the improved mounting corner 41 is local bearing compared with the mounting corners in the prior art, and the contact area is significantly reduced, reducing the fracture failure rate caused by excessive force on the mounting corner to compensate for the gap during the assembly of the air-conditioning system bracket and the compressor mounting corner.

[0024] Furthermore, after the wall thickness of the cylinder block of the present utility model is reduced to 4.5 mm, it not only effectively reduces the overall cost of the compressor, but also reduces the force when installing the bracket 8, further reducing the fracture failure rate caused by excessive force on the mounting corner to compensate for the gap during the assembly of the air-conditioning system bracket and the compressor mounting corner.

[0025] The following table shows the prior art as Figure 4 and the present utility model as Figure 3 respectively apply a force of 5 N·m to the mounting angle each time it increases, and measure the width Y dimension of the two mounting angles until the mounting angle breaks and stops. The test results of the force comparison between the two states are as follows:

[0026]

[0027]

[0028] The above results show that when under the same pressure, the mounting angle of the present utility model has less deformation, can withstand higher pressure, and has better strength.

[0029] In summary, the above is only the preferred embodiment of the present utility model, and is not used to limit the scope of implementation of the present utility model. That is, all equivalent changes and modifications made to the content within the scope of the patent application of the present utility model shall fall within the technical scope of the present utility model.

Claims

1. A cylinder block of an automotive air-conditioning compressor, which comprises a front cover (1), a cylinder block (4), a rear cover (6), and a bracket (8); the front cover (1) is fixed to the front end of the cylinder block (4) by front bolts (2), and an O-ring seal (3) is provided between the front cover (1) and the cylinder block (4); the rear cover (6) is fixed to the rear end of the cylinder block (4) by rear bolts (7), and a valve plate and valve sheet gasket (5) is provided between the rear cover (6) and the cylinder block (4); mounting angles (41) are provided at both the front and rear ends of the cylinder block (4), and the bracket (8) is fixed between the mounting angles (41) at the front and rear ends of the cylinder block (4) by through bolts (9) and nuts (10); it is characterized in that: The installation angle (41) has an inner installation surface, which includes a pressure-bearing surface (412) with an installation hole (411) in the middle and sunken surfaces (413) on both sides of the pressure-bearing surface (412); when the bracket (8) is installed and fixed, it contacts the pressure-bearing surface (412).

2. The cylinder block of the automotive air-conditioning compressor according to claim 1, characterized in that: The wall thickness of the cylinder block (4) is 4.5 mm.

3. The cylinder block of the automotive air-conditioning compressor according to claim 1 or 2, characterized in that: After the bracket (8) and the installation angle (41) are assembled, there is a gap X, and X ≤ 0.2 mm.

4. The cylinder block of the automotive air-conditioning compressor according to claim 1 or 2, characterized in that: The number of installation angles (41) at the front and rear ends of the cylinder block (4) is n, and 8 ≤ n ≤ 3.

5. The cylinder block of the automotive air-conditioning compressor according to claim 4, characterized in that: The installation angles (41) are symmetrically distributed on the circumferences at the front and rear ends of the cylinder block (4).

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