Thread retaining and locking device of air compressor

Abstract

The utility model discloses a thread retaining and locking device of an air compressor, which comprises a front casing of the air compressor, a female and male rotor component and a rear casing of the air compressor, the front casing of the air compressor is mounted and connected at the front end of the rear casing of the air compressor, and the female and male rotor component is arranged between the front casing of the air compressor and the rear casing of the air compressor. A positioning bearing is arranged at the front end of the female and male rotor component and located on a front machine shell of the air compressor, an upper retaining anti-loosening round nut is arranged above the rear end of the female and male rotor component, and the axial gap and the tooth gap of the female and male rotor component are effectively guaranteed by arranging the upper retaining anti-loosening round nut and the lower retaining anti-loosening round nut. The requirement for stable and high-speed operation of the air compressor is met, the installation space is small, the installation requirement for compact internal space of a rear machine shell of the air compressor can be met, and the machining requirement for key grooves in shafts of female and male rotor parts when Wang eight gaskets are used is omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, and particularly relates to a thread anti-loosening and anti-back-off device for an air compressor. Background Art

[0002] An air compressor is a device used to compress gas. The air compressor is similar in structure to a water pump. Most air compressors are reciprocating piston type, rotary vane or rotary screw type. In the compressor, a pair of male and female rotors are meshed, and the contact curve of the tooth surfaces meshes with each other. The low-pressure side completes the air intake process; on the contrary, the high-pressure side completes the compression process and the exhaust process. A gap needs to be reserved between the rotor tooth profile and the rotor tooth groove meshing with it. This gap will affect the thermodynamic performance of the machine. Therefore, in the overall structural design, the axial design requirements are relatively high, and there should be no axial movement inconsistent with the design.

[0003] When the existing compressor uses the design of a round nut and a king washer to avoid axial movement, however, due to the large radial space required and the large gap between the anti-back-off card and the card slot, the locking effect is not good and it cannot be adopted. The structure of two tightened round nuts requires a large axial space and is not convenient for installation.

[0004] Therefore, it is necessary to propose a new thread anti-loosening and anti-back-off device for an air compressor to solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a thread anti-loosening and anti-back-off device for an air compressor to solve the problem that when the existing compressor uses the design of a round nut and a king washer to avoid axial movement, the overall installation space required is large, and the small space makes the installation inconvenient, as mentioned in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A thread anti-loosening and anti-back-off device for an air compressor, including an air compressor front housing, a male and female rotor component, and an air compressor rear housing. The air compressor front housing is installed and connected to the front end of the air compressor rear housing. A male and female rotor component is arranged between the air compressor front housing and the air compressor rear housing. A positioning bearing is arranged on the air compressor front housing at the front end of the male and female rotor component. An upper anti-loosening and anti-back-off round nut is arranged above the rear end of the male and female rotor component, and a lower anti-loosening and anti-back-off round nut is arranged below the rear end of the male and female rotor component.

[0007] Among them, the upper anti-retreat and anti-loosening round nut includes a anti-retreat and anti-loosening round nut shell, an internal sleeve cavity of the anti-retreat and anti-loosening round nut, a pressed-in copper block and a fixing screw. The interior of the anti-retreat and anti-loosening round nut shell is provided with an internal sleeve cavity of the anti-retreat and anti-loosening round nut, and the circumferential side of the anti-retreat and anti-loosening round nut shell is provided with a pressed-in copper block. A fixing screw is provided on the anti-retreat and anti-loosening round nut shell above the pressed-in copper block, and the anti-retreat and anti-loosening round nut shell is connected to the yin and yang rotor components through the internal sleeve cavity of the anti-retreat and anti-loosening round nut.

[0008] Among them, three threaded through holes are opened on the circumferential side of the anti-retraction and anti-loosening round nut shell.

[0009] Wherein, the depth of the threaded through hole is half of the radius difference.

[0010] Wherein, the upper anti-retraction and anti-loosening round nut is threadedly installed on the shaft ends of the yin and yang rotor components.

[0011] Among them, the yin-yang rotor components include a yang rotor shaft, yang rotor vanes, a yin rotor shaft and yin rotor vanes, the circumferential side of the yin rotor shaft is provided with yin rotor vanes, the outer side of the yin rotor vanes is provided with yang rotor vanes, the inner side of the yang rotor vanes is provided with a yang rotor shaft, the rear end of the yang rotor shaft is connected to the lower anti-loosening round nut, and the yin rotor shaft is connected to the upper anti-loosening round nut.

[0012] Wherein, the lower anti-loosening round nut and the upper anti-loosening round nut have the same structure.

[0013] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0014] 1. In the utility model, an upper anti-loosening round nut structure is provided, so that it has a good anti-loosening effect. The anti-loosening round nut shell of the upper anti-loosening round nut passes through the internal sleeve cavity of the anti-loosening round nut, so that it can be threadedly connected to the shaft end of the yin and yang rotor parts. After installation, the pressed copper block is pressed into the internal hole of the anti-loosening round nut shell, and then the set screw is rotatably connected to the anti-loosening round nut shell, and the set screw resists the pressed copper block and presses down, so that the pressed copper block is pressed on the shaft end thread of the yin and yang rotor parts to prevent loosening.

[0015] 2. In the utility model, by providing an upper anti-loosening round nut and a lower anti-loosening round nut structure, the axial and inter-tooth clearances of the male and female rotor components are effectively guaranteed, thereby achieving the requirement of stable and high-speed operation of the air compressor.

[0016] 3. In the utility model, by providing the upper anti-retraction and anti-loosening round nut and the lower anti-retraction and anti-loosening round nut structure, the installation space required is small, which can meet the installation needs of the compact space inside the rear casing of the air compressor.

[0017] 4. In the present utility model, by providing the upper anti-loosening locknut and the lower anti-loosening locknut structures, the machining of key grooves on the shafts of the male and female rotor components required when using the king washer is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic side combined sectional structure diagram of a thread anti-loosening device for an air compressor according to the present utility model;

[0019] Figure 2 FIG. is a schematic structure diagram of the anti-loosening locknut of a thread anti-loosening device for an air compressor according to the present utility model;

[0020] Figure 3 FIG. is a schematic side sectional structure diagram of the upper anti-loosening locknut of a thread anti-loosening device for an air compressor according to the present utility model;

[0021] Figure 4 FIG. is a schematic structure diagram of the male and female rotor components of a thread anti-loosening device for an air compressor according to the present utility model.

[0022] In the figure: 1. Front housing of the air compressor; 2. Positioning bearing; 3. Male and female rotor components; 31. Shaft rod of the male rotor; 32. Rotating blades of the male rotor; 33. Shaft rod of the female rotor; 34. Rotating blades of the female rotor; 4. Rear housing of the air compressor; 5. Lower anti-loosening locknut; 6. Upper anti-loosening locknut; 61. Housing of the anti-loosening locknut; 62. Inner sleeve cavity of the anti-loosening locknut; 63. Press-fitted copper block; 64. Set screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0024] Embodiment 1

[0025] Refer to Figures 1 - 3, A thread anti-loosening device for an air compressor, including the front housing 1 of the air compressor, the male and female rotor components 3, and the rear housing 4 of the air compressor. The front housing 1 of the air compressor is installed and connected to the front end position of the rear housing 4 of the air compressor. There is a male and female rotor component 3 arranged between the front housing 1 and the rear housing 4 of the air compressor. A positioning bearing 2 is arranged on the front housing 1 at the front end of the male and female rotor component 3. An upper anti-loosening round nut 6 is arranged above the rear end of the male and female rotor component 3, and a lower anti-loosening round nut 5 is arranged below the rear end of the male and female rotor component 3.

[0026] In the present utility model, the upper anti-loosening round nut 6 includes an anti-loosening round nut housing 61, an anti-loosening round nut internal cavity 62, a pressed copper block 63, and a set screw 64. An anti-loosening round nut internal cavity 62 is arranged inside the anti-loosening round nut housing 61. A pressed copper block 63 is arranged on the circumferential side of the anti-loosening round nut housing 61. A set screw 64 is arranged on the anti-loosening round nut housing 61 above the pressed copper block 63. The anti-loosening round nut housing 61 of the upper anti-loosening round nut 6 is connected to the male and female rotor component 3 through the anti-loosening round nut internal cavity 62. The anti-loosening round nut housing 61 of the upper anti-loosening round nut 6 can be threadedly connected to the shaft end of the male and female rotor component 3 through the anti-loosening round nut internal cavity 62. After installation, the pressed copper block 63 is pressed into the internal hole of the anti-loosening round nut housing 61, and then the set screw 64 is rotationally connected to the anti-loosening round nut housing 61. The set screw 64 abuts and presses the pressed copper block 63 downward, so that the pressed copper block 63 presses on the shaft end thread of the male and female rotor component 3 to play an anti-loosening role.

[0027] In the present utility model, three threaded through holes are provided on the circumferential side of the anti-loosening round nut housing 61, so that the pressed copper block 63 and the set screw 64 can be correspondingly installed and used.

[0028] In the present utility model, the depth of the threaded through hole is half of the radius difference, which is convenient for corresponding installation and use.

[0029] In the present utility model, the upper anti-loosening round nut 6 is threadedly installed at the shaft end of the male and female rotor component 3, which is convenient for installation and connection.

[0030] In the present utility model, the lower anti-loosening round nut 5 has the same structure as the upper anti-loosening round nut 6, so that they can be correspondingly installed and connected to play an anti-loosening role.

[0031] Working principle: During use, the male and female rotor component 3 rotates inside the front housing 1 and the rear housing 4 of the air compressor. The shaft head end of the male and female rotor component 3 is positioned and rotated through the positioning bearing 2. The shaft tail end of the male and female rotor component 3 is effectively prevented from backing off and loosening by the upper anti-back-off lock nut 6 and the lower anti-back-off lock nut 5, ensuring the effective axial and tooth clearance of the male and female rotor component 3, meeting the requirements of the stable and high-speed operation of the air compressor. Moreover, it requires less installation space, is suitable for the installation needs of a compact space, and reduces the machining of the keyway of the male and female rotor component 3 compared with the king washer.

[0032] Embodiment 2

[0033] Referring to Figure 1 and Figure 4 , a thread anti-back-off and anti-loosening device for an air compressor. Compared with Embodiment 1, the male and female rotor component 3 of this embodiment includes a male rotor shaft rod 31, male rotor blades 32, a female rotor shaft rod 33, and female rotor blades 34. The female rotor blades 34 are arranged on the circumferential side of the female rotor shaft rod 33. The male rotor blades 32 are arranged outside the female rotor blades 34. The male rotor shaft rod 31 is arranged inside the male rotor blades 32. The rear end of the male rotor shaft rod 31 is connected to the lower anti-back-off lock nut 5, and the female rotor shaft rod 33 is connected to the upper anti-back-off lock nut 6.

[0034] Working principle: The rear end of the male rotor shaft rod 31 of the male and female rotor component 3 is connected to the lower anti-back-off lock nut 5, and the female rotor shaft rod 33 is connected to the upper anti-back-off lock nut 6. Thus, the male rotor shaft rod 31 and the female rotor shaft rod 33 play a good role in preventing back-off and loosening during rotation. The male rotor blades 32 and the female rotor blades 34 are staggered with each other, so that it can be rotated for use.

[0035] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A thread anti-loosening and anti-back-off device for an air compressor, comprising a front housing (1) of the air compressor, a male and female rotor assembly (3), and a rear housing (4) of the air compressor. The front housing (1) of the air compressor is installed and connected to the front end of the rear housing (4) of the air compressor. A male and female rotor assembly (3) is disposed between the front housing (1) and the rear housing (4) of the air compressor, and is characterized in that: A positioning bearing (2) is provided at the front end of the male and female rotor component (3) on the front housing (1) of the air compressor. An upper anti-loosening locknut (6) is provided above the rear end of the male and female rotor component (3), and a lower anti-loosening locknut (5) is provided below the rear end of the male and female rotor component (3). Among them: the upper anti-loosening locknut (6) includes an anti-loosening locknut housing (61), an anti-loosening locknut internal sleeve cavity (62), a pressed-in copper block (63), and a set screw (64). The anti-loosening locknut internal sleeve cavity (62) is provided inside the anti-loosening locknut housing (61). A pressed-in copper block (63) is provided on the circumferential side of the anti-loosening locknut housing (61). A set screw (64) is provided on the anti-loosening locknut housing (61) above the pressed-in copper block (63). The anti-loosening locknut housing (61) is connected to the male and female rotor component (3) through the anti-loosening locknut internal sleeve cavity (62).

2. The anti-loosening device with thread backstop for an air compressor according to claim 1, characterized in that: Three threaded through holes are provided on the circumferential side of the anti-loosening locknut housing (61).

3. The anti-loosening device with thread backstop for an air compressor according to claim 2, characterized in that: The depth of the threaded through hole is half of the radius difference.

4. A thread anti-loosening and anti-back-off device for an air compressor according to claim 1, characterized in that: The upper anti-loosening locknut (6) is threadedly installed at the shaft end of the male and female rotor component (3).

5. A thread anti-loosening and anti-back-off device for an air compressor according to claim 1, characterized in that: The male and female rotor component (3) includes a male rotor shaft rod (31), male rotor blades (32), a female rotor shaft rod (33), and female rotor blades (34). Female rotor blades (34) are provided on the circumferential side of the female rotor shaft rod (33). Male rotor blades (32) are provided outside the female rotor blades (34). A male rotor shaft rod (31) is provided inside the male rotor blades (32). The rear end of the male rotor shaft rod (31) is connected to the lower anti-loosening locknut (5), and the female rotor shaft rod (33) is connected to the upper anti-loosening locknut (6).

6. The anti-loosening device with thread retaining function for an air compressor according to claim 1, characterized in that: The lower anti-loosening locknut (5) and the upper anti-loosening locknut (6) have the same structure.

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