Transmission structure, compression assembly and Stirling refrigerator

Abstract

The utility model discloses a transmission structure. The transmission structure comprises a connecting rod, a separator, a first bearing and a second bearing, the connecting rod is provided with a connecting end, the connecting end is provided with a mounting cavity and an isolation hole communicated with the mounting cavity, the mounting cavity penetrates through the two opposite sides of the connecting end, and the isolation hole penetrates through the outer side wall of the connecting end; the isolation piece is detachably connected to the outer side wall of the connecting end, and at least part of the isolation piece can stretch into the mounting cavity through the isolation hole; the first bearing and the second bearing are sequentially arranged in the mounting cavity in the axial direction of the mounting cavity, and the part, stretching into the mounting cavity, of the isolation piece is located between the first bearing and the second bearing. When maintenance is carried out or a connecting rod or a bearing breaks down, the isolation piece can be detached from the connecting end, then the first bearing and the second bearing are pressed out of one outlet of the mounting cavity in a stamping mode, and therefore normal parts can be reused, overall scrapping is not needed, part waste is avoided, and cost is reduced. The utility model further discloses a compression assembly and a Stirling cryocooler.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of Stirling refrigeration equipment, and particularly relates to a transmission structure, a compression assembly and a Stirling refrigeration machine. BACKGROUND

[0002] A connecting rod is arranged in the compression assembly of the Stirling refrigeration machine. In order to improve the operation stability and optimize the power transmission, a double-bearing design is adopted at one end of the connecting rod, that is, two bearings are arranged at one end of the connecting rod, and the two bearings are usually bearings of the same type. In order to realize smooth power transmission of the two bearings, a spacer ring is usually arranged between the two bearings, and the spacer ring is fixed relative to the connecting rod. The bearing and the connecting rod are in interference fit. When the connecting rod or the bearing fails, the bearing cannot be taken out by pulling due to the small size of the bearing inner ring and the small space. Meanwhile, the bearing cannot be taken out by stamping due to the existence of the spacer ring. Therefore, the connecting rod and the bearing can only be scrapped as a whole, resulting in waste of parts and high cost. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the application is that the connecting rod in the compression assembly of the existing Stirling refrigeration machine can only be scrapped as a whole when the connecting rod or the bearing fails, and the cost is high. To solve the technical problem, the application provides a transmission structure, a compression assembly and a Stirling refrigeration machine which can avoid scrapping as a whole and reduce the cost when the connecting rod or the bearing fails.

[0004] The technical scheme provided by the application is as follows:

[0005] The transmission structure comprises:

[0006] A connecting rod has a connecting end, the connecting end is provided with a mounting cavity and a separation hole communicating with the mounting cavity, the mounting cavity penetrates through opposite sides of the connecting end, and the separation hole penetrates through the outer side wall of the connecting end;

[0007] A spacer is detachably connected to the outer side wall of the connecting end, and the spacer can at least partially extend into the mounting cavity through the separation hole;

[0008] A first bearing and a second bearing are sequentially arranged in the mounting cavity in the axial direction of the mounting cavity, and the part of the spacer extending into the mounting cavity is located between the first bearing and the second bearing.

[0009] In the transmission structure, the first bearing and the second bearing are separated by the part of the spacer extending into the mounting cavity. When maintenance is performed or the connecting rod or the bearing fails, the spacer can be detached from the connecting end, and then the first bearing and the second bearing can be pressed out of one of the outlets of the mounting cavity by stamping. Therefore, the normal parts can be reused without scrapping as a whole, waste of parts is avoided, and the cost is reduced.

[0010] Further, the isolation piece comprises a clamping portion and an isolation portion, the clamping portion is clamped with the outer side wall of the connecting end, and the isolation portion can extend into the mounting cavity through the isolation hole and is located between the first bearing and the second bearing.

[0011] Further, the isolation piece comprises a plurality of isolation portions, and the connecting end is provided with a plurality of isolation holes, and each isolation portion can extend into the mounting cavity through a corresponding isolation hole.

[0012] Further, the plurality of isolation holes are arranged at intervals around the mounting cavity.

[0013] Further, the outer side wall of the connecting end has an arc surface, the isolation hole penetrates the arc surface, the clamping portion is arc-shaped, and the clamping portion can be opened under the action of an external force.

[0014] Further, the opposite ends of the clamping portion are provided with connecting holes.

[0015] Further, the isolation portion is plate-shaped.

[0016] Further, the first bearing and the second bearing are coaxially arranged.

[0017] A compression assembly comprising the transmission structure as described above.

[0018] A Stirling refrigerator comprising the transmission structure or the compression assembly as described above.

[0019] In summary, the transmission structure, the compression assembly and the Stirling refrigerator provided by the present application have at least the following advantages:

[0020] The isolation piece of the transmission structure is detachably arranged relative to the connecting rod, so that after the isolation piece is detached, the first bearing and the second bearing can be taken out from the mounting cavity by stamping, without being scrapped as a whole, avoiding waste of parts and reducing cost, and facilitating maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the embodiments of the present application, and are used to explain the present application, and do not constitute a limitation on the present application.

[0022] Figure 1 A cross-sectional structure schematic view of the transmission structure provided by an embodiment of the present application;

[0023] Figure 2 A cross-sectional structure schematic view of the transmission structure provided by an embodiment of the present application; Figure 1 A cross-sectional structure schematic view of the transmission structure provided by an embodiment of the present application;

[0024] Figure 3 for Figure 1 The diagram shows the structural schematic of the connecting rod in the transmission structure shown.

[0025] Figure 4 for Figure 1 The diagram shows the structure of the isolator in the transmission structure.

[0026] Label Explanation:

[0027] 110. Connecting rod; 111. Connecting end; 112. Mounting cavity; 113. Isolation hole; 114. Arc-shaped surface; 120. Isolation component; 121. Holding part; 122. Isolation part; 13. Connecting hole; 130. First bearing; 140. Second bearing. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment 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 application.

[0030] On the one hand, this application provides a transmission structure that can be applied to the compression assembly of a Stirling refrigerator.

[0031] like Figures 1 to 3 As shown, the transmission structure includes a connecting rod 110, an isolating member 120, a first bearing 130, and a second bearing 140. The connecting rod 110 has a connecting end 111, which has a mounting cavity 112 and an isolating hole 113 communicating with the mounting cavity 112. The mounting cavity 112 extends through opposite sides of the connecting end 111, and the isolating hole 113 extends through the outer wall of the connecting end 111, that is, the side wall opposite to the inner wall of the mounting cavity 112. The isolating member 120 is detachably connected to the outer wall of the connecting end 111, and the isolating member 120 can at least partially extend into the mounting cavity 112 through the isolating hole 113.

[0032] The first bearing 130 and the second bearing 140 are arranged in the mounting cavity 112 in sequence along the axial direction (the up-down direction) of the mounting cavity 112, and the part of the isolation member 120 extending into the mounting cavity 112 is located between the first bearing 130 and the second bearing 140, so as to separate the first bearing 130 and the second bearing 140 and avoid mutual influence. Figure 1 The part of the isolation member 120 extending into the mounting cavity 112 is located between the first bearing 130 and the second bearing 140, so as to separate the first bearing 130 and the second bearing 140 and avoid mutual influence.

[0033] The transmission structure is adopted, the part of the isolation member 120 extending into the mounting cavity 112 separates the first bearing 130 and the second bearing 140, when maintenance is performed or the connecting rod 110 or the bearing fails, the isolation member 120 can be detached from the connecting end 111, and then the first bearing 130 and the second bearing 140 can be pressed out of one of the outlets of the mounting cavity 112 by stamping, so that the normal parts can be reused without being scrapped as a whole, parts waste is avoided, and cost is reduced.

[0034] It should be explained that in the embodiment, the first bearing 130 and the second bearing 140 are coaxially arranged, and the outer ring of the first bearing 130 and the outer ring of the second bearing 140 are in interference fit with the inner wall of the mounting cavity 112, after the isolation member 120 between the first bearing 130 and the second bearing 140 is detached, the first bearing 130 (or the second bearing 140) can be stamped by a stamping machine, so as to press the first bearing 130 and the second bearing 140 out of the side opening of the mounting cavity 112 where the second bearing 140 (or the first bearing 130) is located.

[0035] Please refer to Figure 4 In an embodiment, the isolation member 120 includes a clamping portion 121 and an isolation portion 122. The clamping portion 121 is clamped with the outer side wall of the connecting end 111, and the isolation portion 122 can extend into the mounting cavity 112 through the isolation hole 113 and is located between the first bearing 130 and the second bearing 140. As an example, the isolation portion 122 is in a plate shape, so as to increase the contact area between the first bearing 130 and the second bearing 140 and ensure that the first bearing 130 and the second bearing 140 are isolated. It can be understood that the isolation portion 122 does not extend to the inner ring of the first bearing 130, so as to avoid affecting the use of the first bearing 130 and the second bearing 140.

[0036] In an embodiment, the isolation member 120 includes a plurality of isolation portions 122, a plurality of isolation holes 113 are formed in the connecting end 111, each isolation portion 122 can extend into the mounting cavity 112 through a corresponding isolation hole 113, and the plurality of isolation portions 122 can further ensure that the first bearing 130 and the second bearing 140 are completely isolated. Preferably, the plurality of isolation holes 113 are arranged in the mounting cavity 112 in a spaced manner and are uniformly spaced. Optionally, the number of the isolation holes 113 and the isolation portions 122 is 2-7.

[0037] In one embodiment, the outer side wall of the connecting end 111 has an arc surface 114, and the isolation hole 113 penetrates through the arc surface 114; the clamping portion 121 is arc-shaped, and the clamping portion 121 can be opened under the action of an external force, so as to realize that the clamping portion 121 is sleeved on the arc surface 114. It can be determined that the isolation piece 120 is made of a material with elasticity, for example, metal. At the same time, the clamping portion 121 can be opened by using a clamp, and then the clamping portion 121 is sleeved outside the arc surface 114, and the isolation portion 122 corresponds to the isolation hole 113 one by one, and then the clamp is loosened, the clamping portion 121 can be clamped with the arc surface 114, and the isolation portion 122 is inserted into the corresponding isolation hole 113.

[0038] Further, opposite ends of the clamping portion 121 are provided with connecting holes 13, which are used to connect with tools such as clamps, so as to facilitate the opening of the clamping portion 121.

[0039] In order to facilitate understanding of the technical scheme of the present application, the assembly and disassembly process of the transmission structure in the above embodiment are described as follows:

[0040] In the assembly process, the clamp is connected with the connecting hole 13 of the clamping portion 121, then the clamping portion 121 is opened by the clamp, and the clamping portion 121 is sleeved on the arc surface 114, while ensuring that one of the isolation portions 122 is inserted into the corresponding isolation hole 113, so as to realize the positioning of the clamping portion 121. Next, the clamping portion 121 is slowly released, so that the clamping portion 121 is clamped with the arc surface 114, and all the isolation portions 122 are inserted into the corresponding isolation holes 113. The first bearing 130 and the second bearing 140 are respectively pressed into the installation cavity 112 from the openings at both ends of the installation cavity 112, and until the first bearing 130 and the second bearing 140 abut against the isolation portions 122, the assembly of the transmission structure is completed.

[0041] In the disassembly process, the clamp is connected with the connecting hole 13 of the clamping portion 121, then the clamping portion 121 is opened by the clamp, and the clamping portion 121 is taken off from the arc surface 114. Next, the first bearing 130 is stamped by a stamping machine, so that the first bearing 130 and the second bearing 140 are pressed out from the opening on the side where the second bearing 140 of the installation cavity 112 is located, that is, Figure 1 from the top down, the first bearing 130 and the second bearing 140 are pressed out from the opening at the bottom of the installation cavity 112, so that the disassembly of the transmission structure is completed.

[0042] In summary, the transmission structure provided by the present application has at least the following advantages:

[0043] The isolating piece 120 is detachably arranged relative to the connecting rod 110, so that after the isolating piece 120 is detached, the first bearing 130 and the second bearing 140 can be taken out from the mounting cavity 112 by stamping, without being scrapped as a whole, avoiding waste of parts, reducing cost, and facilitating maintenance.

[0044] In another aspect, the application further provides a compression assembly, which comprises the transmission structure.

[0045] In still another aspect, the application further provides a Stirling refrigerator, which comprises the transmission structure or the compression assembly.

[0046] Although the embodiments of the application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmission structure, characterized by, The connecting end is provided with a mounting cavity and an isolation hole in communication with the mounting cavity, the mounting cavity penetrates through opposite sides of the connecting end, and the isolation hole penetrates through the outer side wall of the connecting end. The isolation piece is detachably connected to the outer side wall of the connecting end, and the isolation piece is at least partially capable of extending into the mounting cavity through the isolation hole. The first bearing and the second bearing are sequentially arranged in the mounting cavity along the axial direction of the mounting cavity, and the part of the isolation piece extending into the mounting cavity is located between the first bearing and the second bearing. The isolation piece comprises a clamping portion and an isolation portion, the clamping portion is clamped with the outer side wall of the connecting end, and the isolation portion is capable of extending into the mounting cavity through the isolation hole and is located between the first bearing and the second bearing.

2. The transmission arrangement of claim 1, wherein, The isolation piece comprises a plurality of isolation portions, the connecting end is provided with a plurality of isolation holes, and each isolation portion is capable of extending into the mounting cavity through a corresponding isolation hole.

3. The transmission arrangement of claim 2, wherein, The plurality of isolation holes are arranged at intervals around the mounting cavity.

4. The transmission arrangement of claim 3, wherein, The outer side wall of the connecting end is provided with an arc surface, the isolation hole penetrates through the arc surface, the clamping portion is arc-shaped, and the clamping portion is capable of being opened under the action of an external force.

5. The transmission arrangement of claim 2, wherein, The opposite ends of the clamping portion are provided with connecting holes.

6. The transmission arrangement of claim 5, wherein, The isolation portion is plate-shaped.

7. The transmission arrangement of claim 2, wherein, The first bearing and the second bearing are coaxially arranged.

8. The transmission arrangement of claim 1, wherein, The transmission structure of any one of claims 1-8.

9. A compression assembly characterized by, The compression assembly of claim 9.

10. A Stirling cryocooler characterised in that, ​

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