A compression assembly structure for a stirling cryocooler

Abstract

The utility model relates to the field of stirling cryogenic machine, concretely is a kind of compression subassembly structure of stirling cryogenic machine, comprising: compression piston, set up pin shaft hole, and pin shaft hole is inserted and is connected with the compression pin shaft body of setting;Grease injection hole, set in the one end of compression pin shaft body, and the outer surface of compression pin shaft body is set with grease outlet, and the position of the outer surface of compression pin shaft body corresponding grease outlet is equipped with bearing assembly;Beneficial effect is: the compression pin shaft body is inserted into the pin shaft hole on compression piston, the connection of compression pin shaft body and compression piston is realized by pin shaft hole, at the same time, at least one grease injection hole and multiple grease outlets are set on compression pin shaft body, and oil is injected into the inner ring of needle bearing by grease injection hole and grease outlet on compression pin shaft body, reduce the friction resistance between needle bearing and compression pin shaft body.

Description

Technical Field

[0001] This utility model relates to the field of Stirling refrigerators, specifically to a compression component structure for a Stirling refrigerator. Background Technology

[0002] A Stirling refrigerator, also known as an ST refrigerator, is a type of mechanical refrigeration machine driven by electricity.

[0003] Currently, the compression assembly of the refrigeration unit involves first uniformly applying grease to the inner ring of the needle roller bearing of the compression connecting rod, then placing the end of the needle roller bearing of the compression connecting rod into the cavity of the compression piston, and passing the lower end of the compression pin through the upper pin hole of the compression piston and the inner ring of the needle roller. DP460 glue is then uniformly applied to the hole wall of the lower pin hole of the compression piston, and the lower end of the compression pin is then pushed into the lower pin hole of the compression piston for curing.

[0004] Grease adheres to the lower end of the compression pin as it passes through the inner hole of the needle roller bearing, causing a decrease in the adhesive bonding force between the compression pin and the compression piston pin hole. This leads to a risk of the compression pin loosening during the operation of the refrigeration unit, thus affecting the performance of the refrigeration unit. Utility Model Content

[0005] The purpose of this invention is to provide a compression component structure for a Stirling refrigerator to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A compression assembly structure for a Stirling refrigerator, comprising:

[0008] A compression piston, wherein a pin hole is provided on the compression piston and a compression pin body is inserted into the pin hole;

[0009] A grease injection hole is formed inside the compression pin body and penetrates one end of the compression pin body. A grease outlet hole is also formed on the compression pin body. One end of the grease outlet hole communicates with the grease injection hole, and the other end penetrates the outer wall of the compression pin body. A bearing assembly is fitted on the outer wall of the compression pin body at the position corresponding to the grease outlet hole.

[0010] Preferably, the compression piston is cylindrical, with one end open and the other end closed.

[0011] Preferably, a compression connecting rod is inserted into the open end of the compression piston, and one end of the compression connecting rod, which is inserted into the interior of the compression piston, is connected to a bearing assembly.

[0012] Preferably, the bearing assembly is a needle roller bearing.

[0013] Preferably, the portion where the grease injection hole connects to the grease outlet hole is located at the axial middle position of the compression pin body, and the grease injection hole penetrates at least one end of the compression pin body.

[0014] Preferably, the grease injection hole is located on the central axis of the compression pin body.

[0015] Preferably, the grease outlet is opened along the radial direction of the compression pin body.

[0016] Preferably, the grease outlet holes are provided in multiple sets, and the multiple sets of grease outlet holes are distributed radially.

[0017] Preferably, adhesive is applied between the outer surface of the compression pin body and the wall of the pin hole on the compression piston.

[0018] Preferably, a Stirling refrigerator includes a compression assembly structure for a Stirling refrigerator.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The compression pin body is inserted into the compression piston through a pin hole, thereby connecting the compression pin body and the compression piston. At the same time, at least one grease injection hole and multiple grease outlet holes are opened on the compression pin body. Grease is injected into the bearing assembly through the grease injection hole and grease outlet holes on the compression pin body to reduce the frictional resistance between the bearing assembly and the compression pin body. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the fit between the compression piston and the compression pin body of this utility model.

[0022] Figure 2 This is a schematic diagram of the compression pin body structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the fit between the compression piston and the compression pin body in the prior art of this utility model.

[0024] In the diagram: 1. Compression connecting rod; 2. Compression piston; 3. Upper end of compression pin; 4. Needle roller bearing; 5. Lower end of compression pin; 6. Grease injection hole; 7. Grease outlet hole; 8. Compression pin body. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0026] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Please see Figures 1 to 3 This utility model provides a technical solution: a compression component structure for a Stirling refrigerator, comprising:

[0031] A compression piston 2 is cylindrical with one end open and the other end closed. Two opposing pin holes are provided on the side wall of the compression piston 2. A compression pin body 8 is inserted into the pin holes, with both ends of the compression pin body 8 located in the two pin holes respectively. The compression piston 2 and the compression pin body 8 are pre-connected through the engagement of the pin holes.

[0032] Adhesive is applied between the outer surface of the compression pin body 8 and the pin hole wall on the compression piston 2; the adhesive is used to achieve a solid connection between the compression pin body 8 and the compression piston 2.

[0033] The grease injection hole 6 is opened inside the compression pin body 8 and passes through one end of the compression pin body 8. The compression pin body 8 is also provided with a grease outlet hole 7. One end of the grease outlet hole 7 is connected to the grease injection hole 6, and the other end passes through the outer wall of the compression pin body 8. A bearing assembly is sleeved on the outer wall of the compression pin body 8 at the position corresponding to the grease outlet hole 7.

[0034] Preferably, the grease injection hole 6 is located on the central axis of the compression pin body 8; the grease outlet hole 7 is located radially along the compression pin body 8.

[0035] A grease injection hole is opened at at least one end of the compression pin body, and then multiple grease outlet holes are opened on the side wall of the compression pin body at the position corresponding to the bearing assembly. The grease outlet holes and the grease injection holes are connected. Grease is injected into the bearing assembly through the grease injection holes and grease outlet holes on the compression pin body, thereby reducing the frictional resistance between the needle roller bearing and the compression pin body.

[0036] A compression connecting rod 1 is inserted into the open end of the compression piston 2, and one end of the compression connecting rod 1, which is inserted into the interior of the compression piston 2, is connected to a bearing assembly; the bearing assembly enables the rotational connection between the compression connecting rod 1 and the compression piston 2.

[0037] Preferably, the bearing assembly is a needle roller bearing, but other types of bearings may also be used.

[0038] The portion of the grease injection hole 6 that connects to the grease outlet hole 7 is located at the axial middle position of the compression pin body 8, and the grease injection hole 6 penetrates at least one end of the compression pin body 8.

[0039] Preferably, the grease outlet 7 is provided in multiple sets, and the multiple sets of grease outlet 7 are distributed radially.

[0040] A Stirling refrigerator includes a compression assembly structure of the Stirling refrigerator.

[0041] The installation method of the compression assembly structure of the Stirling refrigerator is as follows: First, install the needle roller bearing 4 at the end of the compression connecting rod 1, and then place the needle roller bearing 4 inside the compression piston 2 through the compression connecting rod 1. At the same time, align the inner ring of the needle roller bearing 4 with the pin hole opened on the compression piston 2.

[0042] Then, apply glue to the upper end 3 and lower end 5 of the compression pin on the outer surface of the compression pin body 8. After the glue is applied, insert the compression pin body 8 coated with glue into the pin hole opened on the compression piston 2. At this time, the needle roller bearing 4 is sleeved on the outside of the compression pin body 8. After the glue cures, grease is injected into the inside of the needle roller bearing 4 through the cooperation of the grease injection hole 6 and the grease outlet hole 7 to reduce the frictional resistance between the needle roller bearing 4 and the compression pin body 8.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0044] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A compression assembly structure for a Stirling refrigerator, characterized in that, include: A compression piston (2) is provided with a pin hole, and a compression pin body (8) is inserted into the pin hole. A grease injection hole (6) is provided inside the compression pin body (8) and passes through one end of the compression pin body (8). A grease outlet hole (7) is also provided on the compression pin body (8). One end of the grease outlet hole (7) is connected to the grease injection hole (6), and the other end passes through the outer wall of the compression pin body (8). A bearing assembly is fitted on the outer wall of the compression pin body (8) at the position corresponding to the grease outlet hole (7).

2. The compression assembly structure of the Stirling refrigerator according to claim 1, characterized in that, The compression piston (2) is cylindrical, with one end open and the other end closed.

3. The compression assembly structure of the Stirling refrigerator according to claim 2, characterized in that, The compression piston (2) has a compression connecting rod (1) inserted into its open end, and one end of the compression connecting rod (1) inserted into the compression piston (2) is connected to the bearing assembly.

4. The compression assembly structure of the Stirling refrigerator according to claim 1, characterized in that, The bearing assembly is a needle roller bearing.

5. The compression assembly structure of the Stirling refrigerator according to claim 2, characterized in that, The part where the grease injection hole (6) is connected to the grease outlet hole (7) is located at the axial middle position of the compression pin body (8), and the grease injection hole (6) penetrates at least one end of the compression pin body (8).

6. The compression assembly structure of the Stirling refrigerator according to claim 5, characterized in that, The grease injection hole (6) is located on the central axis of the compression pin body (8).

7. The compression assembly structure of the Stirling refrigerator according to claim 6, characterized in that, The grease outlet (7) is opened radially along the compression pin body (8).

8. The compression assembly structure of the Stirling refrigerator according to claim 7, characterized in that, The grease outlet (7) has multiple sets, and the multiple sets of grease outlet (7) are distributed radially.

9. The compression assembly structure of the Stirling refrigerator according to claim 2, characterized in that, Adhesive is applied between the outer surface of the compression pin body (8) and the pin hole wall on the compression piston (2).

10. A Stirling refrigerator, characterized in that, Includes the compression assembly structure of the Stirling refrigerator as described in any one of claims 1-9.

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