Anti-misassembly rear cover and compressor

Abstract

This utility model discloses an anti-accidental disassembly rear cover and compressor, including a rear cover body and a first fixing bolt for fixing the rear cover body to the cylinder body, and also includes a blocking structure and at least one pressure plate; the blocking structure is disposed on the outside of the rear cover body and at least partially covers the head of the first fixing bolt; the pressure plate is fixed to the surface of the rear cover body by a second fixing bolt, and the pressure plate is provided with a sealing plug for sealing the test gas port; the blocking structure and the pressure plate are integrally formed; the pressure plate includes a first pressure plate for sealing the test gas inlet and a second pressure plate for sealing the test gas outlet. By designing the blocking structure and the pressure plate as an integrally formed structure, the accidental disassembly of the rear cover bolt is effectively prevented, avoiding the risk of refrigerant leakage, while maintaining the uniformity of bolt specifications, reducing procurement, inventory and assembly costs, and improving production efficiency and assembly accuracy.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to an anti-accidental disassembly back cover and a compressor. Background Technology

[0002] A compressor is a fluid mechanical device that raises low-pressure gas to high-pressure gas. Its core function is to increase gas pressure and density by reducing gas volume, thereby providing power for gas transportation or subsequent processes. It is the "heart" component of refrigeration, air conditioning, heat pump, industrial pneumatic and other systems, responsible for driving the refrigerant to circulate in the system, thereby realizing the refrigeration cycle of compression, condensation, expansion and evaporation.

[0003] As the core component of the refrigeration system in new energy vehicles, the compressor acts as the "heart" of the entire system, and its stable and reliable operation plays a crucial role in the cooling effect. In the compressor's structural design, for ease of installation, the pressure plate bolts and rear cover bolts are set to the same specification. However, this design harbors a significant problem—the risk of accidental disassembly. If the rear cover bolts are accidentally removed after assembly, it greatly increases the risk of leakage in the refrigeration system. After the rear cover is removed, a leak-testing process must be performed on the entire system again to ensure its sealing meets the operational requirements of the new energy vehicle's refrigeration system. To solve this problem caused by the same bolt specifications, the industry has considered using different specifications for the pressure plate bolts and rear cover bolts. However, this solution also has drawbacks: firstly, using different specifications of bolts increases costs in procurement and inventory; secondly, during assembly, if operators confuse the installation positions of different bolt specifications, assembly errors may occur, potentially damaging the pressure plate or rear cover, affecting the overall performance and service life of the compressor.

[0004] Therefore, measures were proposed to prevent accidental disassembly of the rear cover and compressor in order to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a rear cover and compressor that prevent accidental disassembly, in order to solve the problem mentioned in the background art that the current compressor has uniform bolt specifications for the pressure plate and rear cover, which is convenient for installation but poses a risk of accidental disassembly. On the other hand, using bolts of different specifications will increase costs and the risk of assembly errors, highlighting the problem of design balance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an anti-accidental disassembly rear cover, comprising a rear cover body and a first fixing bolt for fixing the rear cover body to the cylinder body, and further comprising a blocking structure and at least one pressure plate; The blocking structure is disposed on the outside of the rear cover body and at least partially covers the head of the first fixing bolt; The pressure plate is fixed to the surface of the rear cover body by the second fixing bolt, and the pressure plate is provided with a sealing plug for sealing the test air port; The blocking structure and the pressure plate are integrally formed.

[0007] Preferably, the pressure plate includes a first pressure plate for blocking the test air inlet and a second pressure plate for blocking the test air outlet, and the blocking structure is integrally formed with the first pressure plate or the second pressure plate to form an integral plate structure.

[0008] Preferably, the first pressure plate and the second pressure plate have the same structure.

[0009] Preferably, the pressure plate has a positioning hole, and the rear cover body has a corresponding positioning pin. The positioning hole and the positioning pin are adapted to each other. The first pressure plate and the second pressure plate cooperate with the positioning pins at different positions on the rear cover body through the positioning hole on them to achieve differentiated installation.

[0010] Preferably, a first sealing plug is provided through the first pressure plate, which is used to insert into the test air inlet on the rear cover body; a second sealing plug is provided through the second pressure plate, which is used to insert into the test air outlet on the rear cover body.

[0011] Preferably, the second fixing bolt passes through the mounting hole on the pressure plate and then fixes the pressure plate to the rear cover body.

[0012] Preferably, the first fixing bolt and the second fixing bolt have the same specifications.

[0013] A compressor includes the aforementioned anti-disassembly rear cover, which is installed at the exhaust position of the cylinder block.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the anti-accidental disassembly rear cover and compressor, by designing the blocking structure and pressure plate as an integral molding structure, effectively prevents the rear cover bolts from being accidentally disassembled, avoiding the risk of refrigerant leakage, while maintaining the uniformity of bolt specifications, reducing procurement, inventory and assembly costs, and improving production efficiency and assembly accuracy. The specific details are as follows: Firstly, by designing the blocking structure and pressure plate as a single, integral structure, and ensuring that the blocking structure at least partially covers the head of the first fixing bolt (i.e., the rear cover bolt), an effective shielding and limiting effect on the rear cover bolt is achieved from a physical structural perspective. This design directly solves the potential for accidental disassembly caused by the pressure plate bolt and the rear cover bolt having the same specifications in the prior art. When operators perform routine maintenance or assembly work, the blocking structure prevents them from directly contacting and disassembling the rear cover bolt, thus avoiding the risk of refrigeration system leakage caused by accidental removal of the rear cover bolt. Simultaneously, it eliminates the need to re-test the entire refrigeration system for leaks after accidental removal of the rear cover, reducing the manpower and time costs of system maintenance and ensuring the stability and sealing of the compressor and even the refrigeration system of new energy vehicles, ensuring that the cooling effect always meets the usage requirements. Secondly, while achieving the anti-misdisassembly function, this utility model does not require changing the specifications of the pressure plate bolt (i.e., the second fixing bolt) and the rear cover bolt (i.e., the first fixing bolt), which can remain consistent. This design cleverly avoids the drawbacks of the prior art's solution of "using different specifications of bolts to avoid misdisassembly": Firstly, in the procurement stage, there is no need to purchase two different specifications of bolts separately, reducing the complexity of supplier selection and procurement negotiations; in the inventory management stage, there is no need to establish separate inventory ledgers and storage space for different specifications of bolts, reducing the overall cost of procurement and inventory. Secondly, since the bolt specifications remain uniform, operators do not need to distinguish the installation positions of different specifications of bolts during assembly, effectively avoiding assembly errors caused by bolt specification confusion, preventing structural damage to the pressure plate and rear cover body caused by improper assembly, ensuring the integrity of each component of the compressor, and extending the overall service life and stable operation cycle of the equipment. Finally, the integrated design of the blocking structure and pressure plate reduces the number of parts in the assembly, eliminating the need for separate processing and assembly of the blocking structure and pressure plate. This simplifies the manufacturing process, reduces labor time during assembly, and improves the overall assembly efficiency of the compressor. Furthermore, the pressure plates are differentiated for installation by engaging with positioning pins on the rear cover body through positioning holes. The first pressure plate (used to seal the test air inlet) and the second pressure plate (used to seal the test air outlet) have identical structures, ensuring accurate installation of pressure plates with different functions and avoiding the confusion in parts management caused by differences in pressure plate structures. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the compressor rear cover in this utility model; Figure 2 This is a side view of the compressor rear cover structure in this utility model; Figure 3 This is a partially enlarged structural diagram of the compressor rear cover in this utility model; Figure 4This is a three-dimensional structural diagram of the first pressure plate in this utility model; Figure 5 This is a schematic diagram of the three-dimensional structure of the second pressure plate in this utility model.

[0016] In the diagram: 1. Back cover body; 2. First fixing bolt; 3. Blocking structure; 4. Second fixing bolt; 5. First pressure plate; 6. Second pressure plate; 7. Positioning hole; 8. Mounting hole; 9. Positioning pin; 10. First sealing plug; 11. Second sealing plug. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] like Figure 1-5 As shown, the core function of the anti-misoperation rear cover and compressor provided by this utility model is to securely fix the compressor rear cover, prevent accidental disassembly of the bolts fixing the rear cover, and seal the test air port of the rear cover. The component mainly includes a rear cover body 1, a first fixing bolt 2, a blocking structure 3, at least one pressure plate, and a second fixing bolt 4. The blocking structure 3 and the pressure plate are manufactured using an integral molding process, forming an inseparable whole structure, which simplifies the component's production and assembly process and improves the stability and reliability of the structure. like Figure 1-2 As shown, the rear cover body 1 is the basic load-bearing component of the compressor rear cover. Its structure and dimensions are adapted to the cylinder of the corresponding compressor model, ensuring a tight seal over the rear opening of the cylinder and protecting the internal components of the compressor. The rear cover body 1 has pre-drilled threaded holes adapted to the first fixing bolt 2, used to fix the rear cover body 1 to the compressor cylinder via the first fixing bolt 2. Simultaneously, the rear cover body 1 is also provided with test ports, including a test inlet and a test outlet. The diameter of the test port matches the size of the sealing plug on the subsequent pressure plate to ensure a sealing effect. Furthermore, to achieve precise positioning and installation of the pressure plates, positioning pins 9 are fixedly installed on the surface of the rear cover body 1. The number of positioning pins 9 corresponds to the number of pressure plates, and the positioning pins 9 for different pressure plates are positioned differently on the rear cover body 1, providing a positioning reference for the differentiated installation of the pressure plates. like Figure 2As shown, the first fixing bolt 2 serves as the connecting component between the rear cover body 1 and the cylinder. Its quantity is determined based on the size of the rear cover body 1 and the fixing requirements, and it is evenly distributed along the edge of the rear cover body 1 to ensure uniform force distribution and stable fixing between the rear cover body 1 and the cylinder. The specifications of the first fixing bolt 2 (including nominal diameter, length, thread profile, etc.) are selected based on parameters such as the compressor's working pressure and the cylinder material to ensure sufficient strength and load-bearing capacity to withstand the vibration and pressure generated during compressor operation, preventing bolt loosening that could lead to displacement or leakage of the rear cover body 1. The blocking structure 3 and the pressure plate are integrally formed. This integral structure is made of metal material (such as stainless steel, aluminum alloy, etc., which have good strength and corrosion resistance) through stamping or casting processes to ensure that the structural strength meets the usage requirements. Pressure plate classification and structure: In this embodiment, two pressure plates are provided: a first pressure plate 5 for sealing the test air inlet and a second pressure plate 6 for sealing the test air outlet. The first pressure plate 5 and the second pressure plate 6 have the same structure, including a pressure plate body, mounting holes 8, positioning holes 7, and sealing plugs. The main body of the pressure plate is a plate-shaped structure. Its size is determined according to the distribution position of the test air port on the back cover body 1 and the coverage of the blocking structure 3, so as to ensure that the sealing plug and the test air port can be connected at the same time, and the blocking structure 3 can cover the head of the first fixing bolt 2. Mounting holes 8 are provided at the edge of the pressure plate body. Each pressure plate has at least one mounting hole 8. The diameter of the mounting hole 8 is adapted to the nominal diameter of the second fixing bolt 4, so that the second fixing bolt 4 can pass through and thus fix the pressure plate to the surface of the rear cover body 1. The positioning hole 7 is located in the middle of the pressure plate body or near the sealing plug. The diameter of the positioning hole 7 is matched with the diameter of the positioning pin 9 on the rear cover body 1. Through the cooperation of the positioning hole 7 and the positioning pin 9, the pressure plate is accurately positioned on the rear cover body 1, avoiding installation misalignment that affects the sealing effect and blocking function. The sealing plug is located at the center of the pressure plate body and is integrally formed with the pressure plate body. The first sealing plug 10 is inserted through the first pressure plate 5, and the second sealing plug 11 is inserted through the second pressure plate 6. The sealing plug is made of elastic material (such as nitrile rubber, fluororubber, etc., which has good sealing performance, oil resistance, and temperature resistance). It is cylindrical in shape, with one end being a smooth sealing end and the other end being fixedly connected to the pressure plate body. The length of the sealing plug is slightly greater than the depth of the test gas port, ensuring that when the pressure plate is fixed, the sealing plug can be completely inserted into the test gas port, achieving a reliable seal for the test gas port and preventing gas leakage from the test gas port during compressor operation. Structure and function of blocking structure 3: The blocking structure 3 is located at the edge of the integrated structure. Its shape is an arc or rectangular plate-shaped protrusion. The coverage of the blocking structure 3 can at least partially cover the head of the first fixing bolt 2. Specifically, the blocking structure 3 can cover the wrench engagement part of the head of the first fixing bolt 2, so that disassembly tools such as wrenches cannot be inserted into and engage the head of the first fixing bolt 2, thereby realizing the function of preventing accidental disassembly of the first fixing bolt 2. The second fixing bolt 4 is used to fix the pressure plate to the surface of the rear cover body 1. Its number is the same as the number of mounting holes 8 on the pressure plate. In order to simplify the spare parts management and assembly operation of the components, the first fixing bolt 2 and the second fixing bolt 4 have the same specifications in this embodiment, including the nominal diameter, thread profile, length and other parameters are completely consistent, so as to avoid confusion during assembly due to different bolt specifications. After the second fixing bolt 4 passes through the mounting hole 8 on the pressure plate, it is threadedly connected to the pre-set threaded hole on the rear cover body 1 (the threaded hole corresponds to the position of the mounting hole 8 and is an internal threaded hole adapted to the second fixing bolt 4). By tightening the second fixing bolt 4, the pressure plate is tightly pressed against the surface of the rear cover body 1, ensuring that the sealing plug is completely inserted into the test air port, and at the same time, the blocking structure 3 is stably positioned outside the head of the first fixing bolt 2 to prevent accidental disassembly.

[0019] Working principle: Before using the anti-accidental disassembly back cover and compressor, it is necessary to check the overall condition of the device to ensure it can function normally. Figure 1 - Figure 5 As shown, first, attach the rear cover body 1 to the rear opening of the compressor cylinder, aligning the threaded holes on the rear cover body 1 with the corresponding threaded holes on the cylinder. Then, pass the first fixing bolts 2 one by one through the threaded holes on the rear cover body 1 and screw them into the threaded holes of the cylinder. Use a torque wrench to tighten the first fixing bolts 2 according to the preset torque value to ensure that the rear cover body 1 and the cylinder are firmly fixed and without loosening. Secondly, position and install the pressure plate: For the first pressure plate 5, align the positioning hole 7 on the first pressure plate 5 with the positioning pin 9 on the rear cover body 1 corresponding to the test air inlet position, so that the positioning pin 9 is inserted into the positioning hole 7, and complete the initial positioning of the first pressure plate 5. At this time, the first sealing plug 10 on the first pressure plate 5 is exactly aligned with the test air inlet on the rear cover body 1, and the blocking structure 3 integrated with the first pressure plate 5 is aligned with the head of the first fixing bolt 2. For the second pressure plate 6: Align the positioning hole 7 on the second pressure plate 6 with the positioning pin 9 on the rear cover body 1 corresponding to the test air outlet position (the positioning pin 9 is in a different position than the positioning pin 9 corresponding to the first pressure plate 5 to avoid installation confusion), so that the positioning pin 9 is inserted into the positioning hole 7 to complete the initial positioning of the second pressure plate 6. At this time, the second sealing plug 11 on the second pressure plate 6 is exactly aligned with the test air outlet on the rear cover body 1. Fixed pressure plate and blocking structure 3: The second fixing bolt 4 is passed through the mounting hole 8 on the first pressure plate 5 and the second pressure plate 6 respectively, and screwed into the corresponding threaded hole on the rear cover body 1. Similarly, the second fixing bolt 4 is tightened with a torque wrench according to the preset torque value (consistent with the tightening torque value of the first fixing bolt 2). During the tightening process, the pressure plate gradually moves closer to the surface of the rear cover body 1. The first sealing plug 10 and the second sealing plug 11 are gradually inserted into the test air inlet and the test air outlet respectively, until the pressure plate is tightly attached to the surface of the rear cover body 1. At this time, the sealing plug completely blocks the test air outlet, and the blocking structure 3 covers the wrench engagement part of the head of the first fixing bolt 2, completing the assembly of the entire component.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An anti-accidental disassembly rear cover, comprising a rear cover body (1) and a first fixing bolt (2) for fixing the rear cover body (1) to the cylinder body, characterized in that: It also includes a blocking structure (3) and at least one pressure plate; The blocking structure (3) is disposed on the outside of the rear cover body (1) and at least partially covers the head of the first fixing bolt (2); The pressure plate is fixed to the surface of the rear cover body (1) by the second fixing bolt (4), and the pressure plate is provided with a sealing plug for sealing the test air port; The blocking structure (3) and the pressure plate are integrally formed.

2. The anti-accidental disassembly back cover according to claim 1, characterized in that: The pressure plate includes a first pressure plate (5) for sealing the test air inlet and a second pressure plate (6) for sealing the test air outlet. The blocking structure (3) is integrally formed with the first pressure plate (5) or the second pressure plate (6) to form an integral plate structure.

3. The anti-accidental disassembly back cover according to claim 2, characterized in that: The first pressure plate (5) and the second pressure plate (6) have the same structure.

4. The anti-accidental disassembly back cover according to claim 3, characterized in that: The pressure plate is provided with a positioning hole (7), and the rear cover body (1) is provided with a corresponding positioning pin (9). The positioning hole (7) and the positioning pin (9) are adapted to each other. The first pressure plate (5) and the second pressure plate (6) cooperate with the positioning pins (9) at different positions on the rear cover body (1) through the positioning hole (7) on them to achieve differentiated installation.

5. The anti-accidental disassembly back cover according to claim 4, characterized in that: A first sealing plug (10) is provided through the first pressure plate (5), and the first sealing plug (10) is used to insert into the test air inlet on the rear cover body (1); a second sealing plug (11) is provided through the second pressure plate (6), and the second sealing plug (11) is used to insert into the test air outlet on the rear cover body (1).

6. The anti-accidental disassembly back cover according to claim 1, characterized in that: The second fixing bolt (4) passes through the mounting hole (8) on the pressure plate and then fixes the pressure plate to the rear cover body (1).

7. The anti-accidental disassembly back cover according to claim 1, characterized in that: The first fixing bolt (2) has the same specifications as the second fixing bolt (4).

8. A compressor comprising the anti-accidental disassembly rear cover as described in any one of claims 1-7, characterized in that: The anti-misoperation rear cover is installed at the exhaust position of the cylinder block.

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