Spring assembling structure and assembling method

Abstract

The invention relates to a spring assembly structure and an assembly method, and belongs to the technical field of compressors, the spring assembly structure comprises a spring mounting hole arranged in a cylinder, and at least one annular groove arranged on the inner wall of the spring mounting hole; the buckle is used for being buckled with the spring mounting hole and is in a cylinder shape with one end opened and the other end closed, a plurality of grooves extending inwards from the opened end are formed in the opened end of the buckle, so that a plurality of flexible elastic pieces are formed, and arc-shaped protrusions extending outwards in the circumferential direction are arranged on the outer side walls of the flexible elastic pieces. Compared with the prior art, the spring assembly structure is optimized, and the installation time of the spring is greatly shortened in the mode that the buckles are buckled with the spring installation holes; and compared with the mode of tapping threads on the inner hole wall of the spring mounting hole and machining a choke plug bolt, only the annular groove needs to be formed in the inner hole wall of the spring mounting hole, the buckle needs to be machined, and the machining process is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a spring assembly structure and an assembly method. Background Art

[0002] The air-conditioning compressor is the core component of the air-conditioning refrigeration system, which mainly plays the role of compression refrigeration in the refrigerant circuit. The compressor cylinder is one of the important components of the air-conditioning compressor, which is mainly used to change the form and pressure of the refrigerant to achieve the refrigeration effect required by the air-conditioning compressor. Due to the requirements of the compressor cylinder structure and function, the compressor cylinder is generally provided with a spring hole and an air suction hole, and a spring is installed in the spring hole.

[0003] The traditional rolling rotor compressor pump body spring assembly method is to have an interference fit between the spring tail and the cylinder spring hole. However, for small springs with a major diameter less than 15mm, the traditional installation method is prone to jumping out during the installation process due to the limitations of its major diameter outer diameter and the wire diameter of the spring itself, which poses certain risks. Therefore, existing manufacturers have proposed a new spring assembly technology - consisting of a spring 3, a blind bolt 2', and a cylinder 1, such as Figure 1 , 2 As shown in the figure, the assembly process is: first install the spring 3 into the spring hole of the cylinder 1, then push the blind bolt 2' against the spring 3 and fix it by thread fastening. However, this solution still has shortcomings, that is, during installation, the thread installation process needs to rotate too many times, which is time-consuming and affects the assembly rhythm. Summary of the invention

[0004] The present invention provides a spring assembly structure and an assembly method, so as to solve the problem in the prior art that the spring assembly structure needs to rotate too many times during the assembly process, which is time-consuming and affects the assembly rhythm.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] One of the purposes of the present invention is to provide a spring assembly structure, which is applied to a compressor, wherein the compressor comprises a cylinder and a spring, and the spring assembly structure comprises:

[0007] A spring mounting hole is provided in the cylinder, and the inner wall of the spring mounting hole is provided with at least one annular groove;

[0008] The buckle used to engage with the spring mounting hole is cylindrical with one end open and the other end closed. The open end of the buckle is provided with a plurality of grooves extending inward from the open end, thereby forming a plurality of flexible spring sheets, and the outer side wall of the flexible spring sheet is provided with an arc-shaped protrusion extending outward along the circumferential direction.

[0009] Furthermore, the closed end of the buckle is provided with an exhaust hole which is concentric with the end surface.

[0010] Furthermore, the end surface of the open end of the buckle is provided with a chamfered structure to prevent the buckle from colliding with the spring and causing collision damage.

[0011] Furthermore, the depth of the groove is h, and the maximum distance between the open end of the buckle and the arc-shaped protrusion is hh, satisfying h≥hh.

[0012] Furthermore, the arc-shaped protrusion is a step-like structure that extends outward along the outer wall surface of the buckle and contracts to a closed state. The cross-section of the step-like structure is a right-angled trapezoid, and the waist of the right-angled trapezoid that is not perpendicular to the upper and lower bases faces the open end of the buckle.

[0013] Furthermore, along the axial direction of the buckle, the width of the end of the arc-shaped protrusion close to the outer wall of the buckle is L2, and the width of the end of the arc-shaped protrusion away from the outer wall of the buckle is L4. The width between the two opposite side surfaces of the annular groove is L3, satisfying L2≥L3>L4.

[0014] Furthermore, the outer diameter of the buckle is d2, the inner diameter of the spring mounting hole is D, and d2 <D。

[0015] Furthermore, the inner diameter of the buckle is d1, and the outer diameter of the spring is D1, satisfying d1>D1.

[0016] Furthermore, the depth of the annular groove is H2, and the height of the arc-shaped protrusion along the radial direction of the buckle is H, satisfying H2≥H.

[0017] The second object of the present invention is to provide a spring assembly method, which adopts the above-mentioned spring assembly structure and includes the following steps: the spring is installed into the buckle from the open end of the buckle, and then the buckle is pressed into the spring mounting hole of the cylinder, and then the arc-shaped protrusion of the buckle is buckled into the annular groove in the spring mounting hole of the cylinder to complete the assembly of the spring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The present invention optimizes the spring assembly structure and utilizes the buckle to engage with the spring mounting hole, making assembly particularly easy. As long as the buckle engagement direction is determined, assembly can be completed in a very short time, greatly reducing the spring installation time and significantly improving work efficiency.

[0020] (2) Compared with the prior art which requires tapping threads on the inner wall of the spring mounting hole and processing a blind head bolt, the present invention only requires opening an annular groove on the inner wall of the spring mounting hole and processing a buckle, which makes the processing process more convenient, lower in cost and higher in efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the spring assembly of the compressor pump body in the prior art;

[0022] Figure 2 It is Figure 1 an enlarged view of the partial view in;

[0023] Figure 3 It is a schematic diagram of the spring assembly of the compressor pump body in the present invention;

[0024] Figure 4 It is Figure 3 one of the enlarged views of the partial view in;

[0025] Figure 5 It is Figure 3 the second enlarged view of the partial view in;

[0026] Figure 6 It is a schematic diagram of the buckle in the embodiment of the present invention;

[0027] Figure 7 It is a top view of the buckle in the embodiment of the present invention;

[0028] Figure 8 It is a cross-sectional view of the buckle in the embodiment of the present invention;

[0029] Figure 9 It is a front view of the buckle in the embodiment of the present invention;

[0030] As shown by the reference numerals in the figure: 1 - cylinder; 2 - buckle; 2' - blind bolt; 3 - spring; 4 - annular groove; 5 - spring mounting hole; 21 - flexible elastic piece; 22 - arc-shaped protrusion; 23 - groove; 24 - chamfer structure; 25 - exhaust hole. Detailed implementation manners

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0032] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0034] In the description of the embodiments of the present invention, the orientation or positional relationships such as "above", "below", "right" and the like are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0035] Embodiment

[0036] This embodiment provides a spring assembly structure and an assembly method to solve the problem that the spring assembly structure in the prior art affects the assembly beat.

[0037] Please refer to the drawings below to describe the spring assembly structure of this embodiment.

[0038] See in detail Figure 3-9 , this embodiment provides a spring assembly structure, which is applied to a compressor. The compressor includes a cylinder 1 and a spring 3. The spring assembly structure includes:

[0039] A spring mounting hole 5 is provided in the cylinder 1. At least one annular groove 4 is provided on the inner wall of the spring mounting hole 5. Preferably, one annular groove 4 is provided in this embodiment;

[0040] A buckle 2 for engaging with the spring mounting hole 5 is in the shape of a cylinder with one end open and one end closed. A plurality of grooves 23 extending inward from the open end are provided at the open end of the buckle 2, so as to form a plurality of flexible elastic pieces 21. An arc-shaped protrusion 22 extending outward in the circumferential direction is provided on the outer side wall of the flexible elastic piece 21. Among them, the material of the flexible elastic piece 21 is a flexible material such as plastic or metal. The setting of the flexible elastic piece 21 can release the stress when the buckle 2 is quickly pressed into the spring mounting hole 5, facilitating the installation of the buckle 2 into the spring mounting hole 5.

[0041] Please see in detail again Figure 4 , in this embodiment, an exhaust hole 25 concentric with the end face is provided at the closed end of the buckle 2 to facilitate the exhaust of the cylinder.

[0042] Please refer to Figure 6 , in this embodiment, a chamfer structure 24 is provided on the end face of the open end of the buckle 2 to avoid collision damage caused by the collision between the buckle 2 and the spring 3.

[0043] Refer to Figures 2 to 4 , the arc-shaped protrusion 22 is a stepped structure that extends outward along the outer wall surface of the buckle 2 and contracts to close. In this embodiment, the cross-section of the stepped structure is a right trapezoid, and the waist of the right trapezoid that is not perpendicular to the upper base and the lower base faces the open end of the buckle 2. The plane where the waist of the right trapezoid that is not perpendicular to the upper base and the lower base is located is the inclined side wall of the arc-shaped protrusion, that is, the inclined side wall of the arc-shaped protrusion faces the open end of the buckle 2. Along the axial direction of the buckle 2, the width of the end of the arc-shaped protrusion 22 close to the outer wall surface of the buckle 2 is L2, the width of the end of the arc-shaped protrusion 22 away from the outer wall surface of the buckle 2 is L4, and the width L3 between the opposite side surfaces of the annular groove 4 satisfies L2≥L3>L4. In this way, it can be ensured that the inclined side wall of the arc-shaped protrusion abuts against the annular groove 4 to prevent the buckle 2 from generating displacement in the annular groove 4 in its axial direction after the spring assembly is completed, resulting in the shaking of the buckle.

[0044] In addition, the outer diameter of the buckle 2 is d2, the inner diameter of the spring mounting hole 5 is D, and d2<D is satisfied. The inner diameter of the buckle 2 is d1, the outer diameter of the spring is D1, and d1>D1 is satisfied. The depth of the annular groove 4 is H2. Here, the depth of the annular groove 4 refers to the distance between the bottom of the annular groove 4 and the notch of the annular groove 4. The height of the arc-shaped protrusion 22 along the radial direction of the buckle 2 is H. Here, the height of the arc-shaped protrusion 22 along the radial direction of the buckle 2 refers to the distance between the end of the arc-shaped protrusion 22 close to the outer wall surface of the buckle 2 and the end of the arc-shaped protrusion 22 away from the outer wall surface of the buckle 2. The two satisfy H2≥H. In this way, it can be ensured that the arc-shaped protrusion 22 of the buckle 2 can be fully engaged in the annular groove 4 without the situation that the arc-shaped protrusion 22 slips out of the annular groove 4. For specific details, see Figure 5 .

[0045] In this embodiment, the depth of the groove 23 is h. Here, the depth of the groove 23 refers to the distance between the bottom of the groove 23 and the notch of the groove 23. The maximum distance between the open end of the buckle 2 and the arc-shaped protrusion 22 is hh. The two satisfy h≥hh. In this way, it can be ensured that the arc-shaped protrusion 22 is located on the flexible elastic piece 21. For specific details, see Figure 9 , so as to ensure the smooth assembly of the spring assembly structure.

[0046] This embodiment also provides a spring assembly method, which adopts the above spring assembly structure and specifically includes the following steps: The spring 3 is inserted into the buckle 2, and the large-diameter end of the spring 3 needs to be inserted into the buckle 2 first; then starting from the open end of the buckle 2, the buckle 2 is pressed into the spring installation hole 5 of the cylinder 1, and then the arc-shaped protrusion 22 of the buckle 2 is buckled into the annular groove in the spring installation hole 5 of the cylinder 1, that is, the assembly of the spring is completed. This spring assembly method uses the way of buckling the buckle and the spring installation hole 5, and the assembly is particularly easy. As long as the buckling direction of the buckle is determined, the assembly can be completed in a very short time, greatly reducing the installation time of the spring.

[0047] In summary, the present invention optimizes the spring assembly structure and is applied to the assembly of the spring in the spring hole of the compressor cylinder. The spring assembly structure uses the way of buckling the buckle and the spring installation hole 5, and the assembly is particularly easy. As long as the buckling direction of the buckle is determined, the assembly can be completed in a very short time, greatly reducing the installation time of the spring, and the working efficiency is significantly improved. In addition, compared with the prior art that requires tapping the inner hole wall of the spring installation hole 5 and machining the blind head bolt, the present invention only needs to open the annular groove 4 and machine the buckle on the inner hole wall of the spring installation hole 5, and the processing technology is more convenient.

[0048] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A spring assembly structure is applied to a compressor. The compressor includes a cylinder (1) and a spring (3), and is characterized in that The spring assembly structure comprises: A spring mounting hole (5) is provided in the cylinder (1), and the inner wall of the spring mounting hole (5) is provided with at least one annular groove (4); The buckle (2) for engaging with the spring mounting hole (5) is in the shape of a cylinder with one end open and the other end closed. The open end of the buckle (2) is provided with a plurality of grooves (23) extending inwardly from the open end, thereby forming a plurality of flexible spring sheets (21). The outer side wall of the flexible spring sheet (21) is provided with an arc-shaped protrusion (22) extending outwardly along the circumferential direction.

2. The spring assembly structure according to claim 1, characterized in that The closed end of the buckle (2) is provided with an exhaust hole (25) which is concentric with the end surface.

3. The spring assembly structure according to claim 1, characterized in that The end surface of the open end of the buckle (2) is provided with a chamfered structure (24) to prevent the buckle (2) from colliding with the spring and causing collision damage.

4. The spring assembly structure according to claim 1, characterized in that The depth of the groove (23) is h, and the maximum distance between the open end of the buckle (2) and the arc-shaped protrusion (22) is hh, satisfying h≥hh.

5. The spring assembly structure according to claim 1, characterized in that The arc-shaped protrusion (22) is a step-like structure that extends outward along the outer wall surface of the buckle (2) and contracts to be closed. The cross-section of the step-like structure is a right-angled trapezoid, and the waist of the right-angled trapezoid that is not perpendicular to the upper base and the lower base faces the open end of the buckle (2).

6. The spring assembly structure according to claim 1, characterized in that Along the axial direction of the buckle (2), the width of the end of the arc-shaped protrusion (22) close to the outer wall surface of the buckle (2) is L2, the width of the end of the arc-shaped protrusion (22) away from the outer wall surface of the buckle (2) is L4, and the width between the two opposite side surfaces of the annular groove (4) is L3, satisfying L2≥L3>L4.

7. The spring assembly structure according to claim 1, characterized in that The outer diameter of the buckle (2) is d2, and the inner diameter of the spring mounting hole (5) is D, satisfying d2 <D。 8. The spring assembly structure according to claim 1, characterized in that The inner diameter of the buckle (2) is d1, and the outer diameter of the spring is D1, satisfying d1>D1.

9. The spring assembly structure according to claim 1, characterized in that The depth of the annular groove (4) is H2, and the height of the arc-shaped protrusion (22) along the radial direction of the buckle (2) is H, satisfying H2≥H.

10. A spring assembly method, characterized in that It adopts the spring assembly structure described in any one of claims 1 to 9, comprising the following steps: the spring (3) is installed into the buckle (2) from the open end of the buckle (2), and then the buckle (2) is pressed into the spring mounting hole (5) of the cylinder (1), and then the arc-shaped protrusion (22) of the buckle (2) is buckled into the annular groove (4) in the spring mounting hole (5) of the cylinder (1), thereby completing the assembly of the spring.

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