New type of compressor anti-foreign object stator fixture

Abstract

A novel compressor stator fixture for preventing foreign objects from entering includes a pressure claw (1), a fixture base (2), and a clearance gauge (5) fitted inside the fixture base (2). The fixture base (2) has a pair of through fixture openings (22) in a symmetrical direction. The key technical feature is that each fixture opening (22) is slidably equipped with a sliding pressure block (3). The sliding pressure block (3) includes a columnar body that mates with the inner wall of the fixture opening (22). The columnar body is divided into two parts by an annular protrusion (33), and the outer side of the annular protrusion (33) is an enlarged and equal-diameter stepped end (31). This design offers the advantage of excellent sealing performance.

Description

Technical Field

[0001] This utility model relates to stator fixtures, specifically a novel stator fixture for compressors designed to prevent foreign matter contamination. Compared to traditional stator fixtures, it effectively avoids contamination of the workpiece by foreign matter such as welding spatter during compressor production. Background Technology

[0002] Existing compressor assembly auxiliary fixtures are mainly used for assembling motors (including stators and rotors), pump bodies, and housings. During operation, the fixture is carried and transported by a conveyor chain. The assembly process is as follows: first, the motor stator assembly is placed, and a clearance gauge is inserted into the inner diameter of the stator; then, the rotor and pump body are pressed into place as a composite assembly after thermal bonding; subsequently, the heated housing assembly is fitted in, and thermal bonding between the housing and stator assembly is achieved using the principle of thermal expansion and contraction; finally, the housing and pump body are connected by three-point welding. The entire assembly process is completed on this fixture, ensuring both machining accuracy and assembly efficiency.

[0003] like Figure 1 As shown, existing stator fixtures often have the following drawbacks: when the compressor is detached from the fixture, the clearance gauge needs to be fixed, and the fixing claws need to extend into the fixture from the openings on both sides to operate. This opening structure makes it easy for foreign objects such as welding slag to enter during the production process. If ferrous foreign objects enter the compressor, it will cause the pump body to seize up, ultimately rendering the compressor unusable. Although a protective baffle has been added above the fixture opening, it can only partially block the entry of foreign objects and cannot fundamentally eliminate the risk of foreign object intrusion. Utility Model Content

[0004] The purpose of this invention is to provide a novel compressor stator fixture for preventing foreign objects from entering, which fundamentally solves the above-mentioned problems and has the advantage of good sealing performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: The novel compressor anti-foreign-object stator fixture includes a pressure claw, a fixture base, and a clearance gauge assembled in the fixture base. The fixture base has a pair of through fixture openings in a symmetrical direction. The key technical point is that each fixture opening is slidably provided with a sliding pressure block. The sliding pressure block includes a columnar body that cooperates with the inner wall of the fixture opening. The columnar body is divided into two parts by an annular protrusion. The outer side of the annular protrusion is a stepped end with an expanded diameter and equal diameter, and the inner side of the annular protrusion is an insertion end with a reduced diameter and equal diameter. The insertion end is provided with a through oval pressure block through hole. A limiting pin is provided in the vertical direction of the fixture opening. The limiting pin also passes through the pressure block through hole. A spring limits the limiting pin between the limiting pin and the annular protrusion.

[0006] The beneficial effects of this utility model are as follows: the sliding fit between the sliding pressure block and the opening of the fixture forms a closed structure, which not only reliably achieves the function of fixing the gap at the specified position, but also directly blocks the intrusion channel of foreign objects, thus eliminating the risk of foreign object contamination in the compressor production process from the source.

[0007] The limiting pin passes through the through hole of the oval pressure block and forms an elastic constraint structure with the spring, which not only ensures the stability and accuracy of the gap gauge fixation, but also simplifies the overall structural design and significantly improves the convenience of maintenance.

[0008] The sliding pressure block forms an enlarged-diameter stepped end through an annular protrusion, making the exposed part step-shaped, which can effectively block the adhesion of welding slag, avoid sliding jamming caused by foreign matter adhesion, and ensure the long-term stable operation of the fixture.

[0009] The overall structure, through the adaptation of the columnar main body and the opening of the fixture, and the coordination of elastic constraints and sliding guidance, achieves a balance between lightweight structure and ease of operation while meeting functional requirements, thus improving the practical performance of the fixture. Attached Figure Description

[0010] Figure 1 This is a schematic cross-sectional view of an existing stator fixture.

[0011] Figure 2 This is a cross-sectional view of the present invention in its open state.

[0012] Figure 2a for Figure 2 A schematic diagram of the clothing structure.

[0013] Figure 3 This is a cross-sectional view of the present invention in the compressed state.

[0014] Figure 3a for Figure 3 A top-view structural diagram. Detailed Implementation

[0015] The following combination Figure 2 , Figure 3 This invention will be described in detail through specific embodiments. The novel compressor stator fixture for preventing foreign objects from entering the compressor mainly consists of a pressure claw 1, a fixture base 2, a clearance gauge 5, a sliding pressure block 3, a limiting pin 4, and a spring 21. These components work together to achieve positioning, foreign object prevention, and operational stability during the compressor stator assembly process. The fixture base 2 serves as the overall mounting foundation, and it has a pair of through-holes 22 machined symmetrically. The inner walls of the openings are ground to ensure precise fit with the sliding pressure block 3. The clearance gauge 5 is fitted into the inner cavity of the fixture base 2.

[0016] The sliding pressure block 3 is a key functional component. Its main body is a columnar structure that forms a clearance fit with the inner wall of the fixture opening 22. A ring-shaped protrusion 33 is provided on the outer side of the columnar main body, extending radially outward. The ring-shaped protrusion 33 divides the columnar main body into two parts: an outer stepped end 31 with an expanded diameter and equal diameter, and an inner insertion end 32 with a reduced diameter and equal diameter. The outer wall of the ring-shaped protrusion 33 is adapted to the inner diameter of the fixture opening 22, allowing the sliding pressure block 3 to slide freely along the opening axis. A through-hole 321, an oblong shape, is provided on the insertion end 32 along the axial direction. The length of this through-hole is consistent with the axial direction of the sliding pressure block 3, and its width is slightly larger than the diameter of the limiting pin 4. This ensures that the limiting pin 4 can pass through smoothly while also providing axial sliding space for the sliding pressure block 3. The limiting pin 4 is fixedly installed on the fixture base 2 perpendicular to the axis of the fixture opening 22. Its two ends pass through the side wall of the fixture base 2 and the pressure block through hole 321 of the sliding pressure block 3, respectively, forming a radial constraint and axial sliding guide for the sliding pressure block 3. One end of the spring 21 abuts against the inner end face of the annular protrusion 33, and the other end abuts against the limiting pin 4, providing a continuous outward elastic thrust to the sliding pressure block 3 through the pre-compression amount.

[0017] During operation, when the gap gauge 5 needs to be operated, the pressure claw 1 pushes the sliding pressure block 3 inward, so that it overcomes the elastic force of the spring 21 and slides inward. The insertion end 32 abuts against the outer wall of the gap gauge 5 inward. During the sliding process, the annular protrusion 33 keeps the fixture opening 22 sealed.

[0018] Explanation of reference numerals in the attached figures: 1. Pressure claw; 2 Fixture base, 21 Spring, 22 Fixture opening, 23 Pressing and fixing surface; 3. Sliding pressure block; 31. Stepped end; 32. Insertion end; 321. Pressure block through hole; 33. Annular protrusion; 4. Limit pins; 5. Gap gauge.

Claims

1. A novel compressor anti-foreign-object stator fixture, comprising pressure claws (1), fixture base (2), and clearance gauge (5) assembled within the fixture base (2), wherein the fixture base (2) has a pair of through fixture openings (22) in a symmetrical direction, characterized in that: Each fixture opening (22) is slidably provided with a sliding pressure block (3). The sliding pressure block (3) includes a columnar body that cooperates with the inner wall of the fixture opening (22). The columnar body is divided into two parts by an annular protrusion (33). The outer side of the annular protrusion (33) is a stepped end (31) with an expanded diameter and equal diameter, and the inner side of the annular protrusion (33) is an insertion end (32) with a reduced diameter and equal diameter. The insertion end (32) is provided with a through oval pressure block through hole (321). A limiting pin (4) is provided in the vertical direction of the fixture opening (22). The limiting pin (4) passes through the pressure block through hole (321). A spring (21) limits the limiting pin (4) and the annular protrusion (33).

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