CN217817677U - Ultra-low temperature refrigerator and hanging basket transmission mechanism used for ultra-low temperature refrigerator - Google Patents

Abstract

The application relates to an ultra-low temperature refrigerator and a hanging basket transmission mechanism used for the ultra-low temperature refrigerator. The heat insulation shell comprises a heat insulation upper shell and a heat insulation lower shell which mutually enclose to form a cavity. The output shaft of driving piece wears to locate thermal-insulated epitheca, and the output of output shaft is located the cavity. The coupling subassembly is located the inside of cavity, and be connected with the output of output shaft, in order to rotate around a rotation axis under the drive of output shaft, thermal-insulated inferior valve is worn to locate by the driven shaft, the driven shaft has the first end that is located the cavity and is located the second end outside the cavity, first end is connected with the coupling subassembly, the second end is used for connecting the hanging flower basket, in order to make the driven shaft rotatory around the rotation axis under the drive of coupling subassembly, can be when not influencing the work of driving piece, the effectual coupling subassembly and the inside and the outside heat transfer of ultra-low temperature refrigerator that has reduced.

Description

Ultra-low temperature refrigerator and hanging basket transmission mechanism used for ultra-low temperature refrigerator

Technical Field

The application relates to the technical field of ultra-low temperature refrigerators, in particular to an ultra-low temperature refrigerator and a hanging basket transmission mechanism used for the same.

Background

In order to realize the automatic management of the ultra-low temperature refrigerator, a hanging basket and a hanging basket transmission mechanism are additionally arranged in the ultra-low temperature refrigerator. Because the hanging flower basket drive mechanism's stability of operation and the demand of reliability, drive mechanism often is made by metal material, and metal material has higher coefficient of heat conductivity, because hanging flower basket drive mechanism's driving piece can produce certain heat in the during operation unavoidably, hanging flower basket drive mechanism usually can aggravate the heat conduction inside the refrigerator to a certain extent for the inside temperature of ultra-low temperature refrigerator is difficult to stable the maintenance in target temperature range.

SUMMERY OF THE UTILITY MODEL

In view of above-mentioned problem, this application provides an ultra-low temperature refrigerator and be used for its hanging flower basket drive mechanism, can effectual separation drive structure to the inside heat conduction of ultra-low temperature refrigerator, guarantee that ultra-low temperature refrigerator's internal environment can maintain in the target temperature range.

In a first aspect, the present application provides a basket transmission mechanism for an ultra-low temperature refrigerator, the basket transmission mechanism includes a heat insulating case, a driving member, a coupling assembly and a driven shaft. The heat insulation shell comprises a heat insulation upper shell and a heat insulation lower shell which mutually enclose to form a cavity; an output shaft of the driving piece penetrates through the heat insulation upper shell, and an output end of the output shaft is positioned in the cavity; the coupling assembly is located inside the cavity and is connected with the output end of the output shaft so as to rotate around a rotation axis under the driving of the output shaft; the driven shaft penetrates through the heat insulation lower shell; the driven shaft having a first end located within the cavity and a second end located outside of the cavity; the first end is connected with the coupling assembly, and the second end is used for connecting a hanging basket, so that the driven shaft can rotate around the rotating axis under the driving of the coupling assembly.

Above-mentioned hanging flower basket drive mechanism, output shaft and driven shaft pass through the coupling subassembly and connect, and when driving piece drive output shaft rotated, the output shaft drove the coupling subassembly to it rotates to drive the driven shaft, and then the output can drive hanging flower basket mechanism pivoted rotation torque. Because the heat-insulating upper shell and the heat-insulating lower shell are enclosed into a cavity, and the coupling component for transmission is arranged in the cavity. Make complete holding of coupling subassembly enclose the inside of establishing the cavity that forms in thermal-insulated epitheca and thermal-insulated inferior valve, do not influence the output shaft output rotation torque of driving piece simultaneously yet, can be when not influencing the work of driving piece, the effectual coupling subassembly that has reduced and the inside and the outside heat transfer of ultra-low temperature refrigerator.

In some embodiments, the coupling assembly includes a first power disc and a second power disc disposed opposite and fixedly connected to each other; the first power disc is connected with the output end of the output shaft; one end of the second power disc, which is far away from the first power disc, is connected with the first end; wherein the first power disc and the second power disc have a gap therebetween in a direction parallel to the axis of rotation.

In some embodiments, the coupling assembly further comprises a pin; the first power disc is provided with a first connecting hole, and the second power disc is provided with a second connecting hole corresponding to the first connecting hole; the pin penetrates through the first connecting hole and the second connecting hole, so that the second power disc is fixedly connected with the first power disc.

In some embodiments, the thermal conductivity of the pin is less than the thermal conductivity of the first power disc and the thermal conductivity of the second power disc.

In some embodiments, the coupling assembly further comprises a damper; the buffer piece is embedded in the first connecting hole and/or the second connecting hole; the buffer piece is provided with an assembling hole, and the pin penetrates through the assembling hole.

In some embodiments, the insulated upper shell includes a first mating portion at a junction of the insulated upper shell and the insulated lower shell; the heat insulation lower shell comprises a second butt joint part positioned at the joint of the heat insulation upper shell and the heat insulation lower shell; the first butt joint part is tightly attached to the second butt joint part to enclose the cavity.

In some embodiments, the insulated housing further comprises a sealing ring; a first sealing groove is formed in the first butt joint part, and a second sealing groove opposite to the first sealing groove is formed in the second butt joint part; the sealing ring is embedded in the first sealing groove and the second sealing groove, so that the first butt joint part and the second butt joint part are tightly attached.

In some embodiments, a dynamic seal is arranged at the contact position of the heat insulation upper shell and the output shaft; and/or a movable sealing element is arranged at the contact position of the heat insulation lower shell and the driven shaft.

In some embodiments, the dynamic seal is a rubber ring or a seal bearing.

In a second aspect, the present application provides an ultra-low temperature refrigerator, which includes a cabinet and a basket located inside the cabinet; and a basket transmission mechanism as described in any of the above embodiments; the hanging basket is fixedly connected with the second end of the driven shaft so as to rotate around the rotating axis under the driving of the driven shaft.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a sectional view of a basket transferring mechanism for an ultra-low temperature refrigerator according to an embodiment of the present application;

FIG. 2 is an enlarged partial cross-sectional view of a cross-sectional view of the basket drive mechanism in the embodiment of FIG. 1;

FIG. 3 is a perspective sectional view of a basket transmission mechanism for an ultra-low temperature refrigerator according to an embodiment of the present application;

fig. 4 is a sectional view of an ultra-low temperature refrigerator in an embodiment of the present application.

The reference numbers in the detailed description are as follows:

the heat insulation device comprises a heat insulation shell 1, a heat insulation upper shell 11, a heat insulation lower shell 12, a sealing ring 13 and a dynamic sealing element 14;

a driver 2 and an output shaft 21;

the coupling component 3, the first power disc 31, the first connection hole 311, the first butting part 312, the first sealing groove 313, the second power disc 32, the second connection hole 321, the second butting part 322, the second sealing groove 323, the pin 33 and the cushion 34;

a driven shaft 4;

a basket 5.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present application more clearly, and therefore are only used as examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures above, are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

As described in the background art, the ultra-low temperature refrigerator is a refrigerator with an operating temperature of 60 ℃ or lower, and in order to realize the automatic management of the ultra-low temperature refrigerator, a basket and a basket transmission mechanism must be additionally arranged in the ultra-low temperature refrigerator. In the related art, because the demands on the stability and reliability of the operation of the hanging basket transmission mechanism are met, the transmission mechanism is often made of metal materials, the metal materials have high heat conductivity, when a heat transfer system made of the metal materials is connected with an external driving part, heat can be generated in the working process of the driving part, the heat conduction in the refrigerator can be aggravated to a certain extent, and the temperature in the ultra-low temperature refrigerator is difficult to maintain in a target temperature range. In the related art, there are two solutions, one is to use non-metal materials and other materials with excellent physical properties and economic applicability, but the solution is difficult to achieve with the current technical level. Secondly, all seal driving piece and transmission system under the ultra-low temperature environment, and the reliability of the driving piece operation under the ultra-low temperature operating mode among the prior art is difficult to guarantee.

Based on the consideration, in order to solve the problems that in the related art, a hanging basket transmission mechanism in an ultra-low temperature refrigerator is made of a metal material, has a high heat conductivity coefficient, and can conduct heat inside the furniture refrigerator to a certain extent, so that the temperature inside the ultra-low temperature refrigerator is difficult to maintain within a target temperature range, the ultra-low temperature refrigerator and the hanging basket transmission mechanism used for the same are provided.

The basket transmission mechanism disclosed by the embodiment of the application can be used in an ultra-low temperature refrigerator, but is not limited to be used in the ultra-low temperature refrigerator, and is suitable for other basket mechanisms needing to reduce the heat conduction performance of the transmission mechanism.

Fig. 1 illustrates a sectional view of a basket transmission mechanism for an ultra-low temperature refrigerator in an embodiment of the present application, fig. 2 illustrates a partially enlarged sectional view of the basket transmission mechanism in fig. 1, fig. 3 illustrates a perspective sectional view of the basket transmission mechanism for the ultra-low temperature refrigerator in an embodiment of the present application, and fig. 4 illustrates a sectional view of the ultra-low temperature refrigerator in an embodiment of the present application.

In a first aspect, according to some embodiments of the present application, referring to fig. 1, 2 and 3, a basket transmission mechanism for an ultra-low temperature refrigerator is provided, which includes an insulated casing 1, a driving member 2, a coupling assembly 3 and a driven shaft 4. The insulated housing 1 comprises an insulated upper shell 11 and an insulated lower shell 12 enclosing each other to form a cavity. The output shaft 21 of the driving member 2 is inserted into the heat-insulating upper shell 11, and the output end of the output shaft 21 is located in the cavity. The coupling component 3 is located the inside of cavity to be connected with the output of output shaft 21, in order to rotate around a rotation axis under the drive of output shaft 21, the thermal-insulated inferior valve 12 is worn to locate by driven shaft 4, and driven shaft 4 has the first end that is located the cavity and lies in the second end outside the cavity, and first end is connected with the coupling component 3, and the second end is used for connecting hanging flower basket 5, so that driven shaft 4 is rotatory around the rotation axis under the drive of coupling component 3.

It can be understood that, in the basket transmission mechanism, the output shaft 21 and the driven shaft 4 are connected through the coupling component 3, when the driving component 2 drives the output shaft 21 to rotate, the output shaft 21 drives the coupling component 3 and drives the driven shaft 4 to rotate, and then the rotating torque capable of driving the basket transmission mechanism to rotate is output. Since the upper and lower heat insulating cases 11 and 12 are enclosed into a cavity, the coupling assembly 3 for transmission is disposed inside the cavity. Make complete holding of coupling subassembly 3 in the inside of the cavity that thermal-insulated epitheca 11 and thermal-insulated inferior valve 12 enclose and establish and form, do not influence output shaft 21 of driving piece 2 simultaneously and export the rotation torque to driven shaft 4 yet, can be when not influencing driving piece 2 work, the effectual heat transfer that has reduced coupling subassembly 3 and ultra-low temperature refrigerator inside and ultra-low temperature refrigerator outside.

Specifically, driving piece 2 is the motor, separates driving piece 2 through thermal-insulated casing 1 and shaft coupling subassembly 3 and refrigerator inside, and the heat exchange of the heat that can produce in the separation motor working process and the inside air conditioning of refrigerator has reduced the inside ability of ultra-low temperature refrigerator and has lost for ultra-low temperature refrigerator can continuously maintain within the target temperature range, and reduces ultra-low temperature refrigerator's energy consumption.

With continued reference to fig. 1 and fig. 3, in some embodiments, the coupling assembly 3 includes a first power disc 31 and a second power disc 32 disposed opposite to each other and fixedly connected to each other, the first power disc 31 is connected to the output end of the output shaft 21, and an end of the second power disc 32 far away from the first power disc 31 is connected to the first end. Wherein there is a gap between the first power disc 31 and the second power disc 32 in a direction parallel to the rotation axis.

It will be appreciated that the first power disc 31 of the coupling assembly 3 is fixedly connected to the output end of the output shaft 21, and therefore the first power disc 31 can be rotated about the rotation axis by the output end. Since the second power disc 32 is fixedly connected to the first power disc 31, the second power disc 32 will also rotate along with the rotation of the first power disc 31. Further, since the first power disc 31 and the second power disc 32 have a gap in a direction parallel to the rotation axis, the heat conduction between the first power disc and the second power disc 32 can be effectively reduced.

Referring to fig. 1, fig. 2 and fig. 3, in some embodiments, the coupling assembly 3 further includes a pin 33, the first power plate 31 is formed with a first connection hole 311, and the second power plate 32 is formed with a second connection hole 321 corresponding to the first connection hole 311. The pins 33 are inserted through the first connecting holes 311 and the second connecting holes 321 to fixedly connect the second power disc 32 with the first power disc 31.

That is, the first power disc 31 has a first connecting hole 311, the second power disc 32 has a second connecting hole 321, and the first power disc 31 and the second power disc 32 are connected by the pins 33. Therefore, the contact area between the first power disk 31 and the second power disk 32 becomes small, and the heat conduction between the first power disk 31 and the second power disk 32 can be effectively reduced. In addition, the pin 33 has the advantages of small volume, economy, low requirements on physical properties and low modification cost, and solves the technical difficulty that the heat insulation of the hanging basket transmission mechanism in the ultralow temperature environment is difficult to realize.

In some embodiments, the thermal conductivity of the pins 33 is less than the thermal conductivity of the first power disc 31 and the thermal conductivity of the second power disc 32. That is, the heat conduction rate on the first power disc 31 is greater than the heat conduction rate on the pins 33, and the heat conduction rate on the second power disc 32 is greater than the heat conduction rate on the pins 33, so that the heat transfer between the first power disc 31 and the second power disc 32 can be effectively reduced, and the heat dissipation can be reduced.

Specifically, the pin 33 is made of a material having excellent cushioning properties and thermal insulation properties, including but not limited to polyurethane, cowhells, and the like.

Referring to fig. 2, in some embodiments, the coupling assembly 3 further includes a buffer 34, the buffer 34 is embedded in the first connecting hole 311 and/or the second connecting hole 321, the buffer 34 is provided with an assembling hole, and the pin 33 is inserted through the assembling hole.

It can be understood that the buffering member 34 is embedded in the first connecting hole 311 and/or the second connecting hole 321, so that the connection stability between the pin 33 and the first connecting hole 311 and/or the second connecting hole 321 can be effectively improved, and the first power disc 31 and the second power disc 32 can be effectively fixed.

It can be understood that the cushion 34 can be separately disposed in the first connection hole 311 (see fig. 3), can be separately disposed in the second connection hole 321 (see fig. 1), and can be disposed in both the first connection hole 311 and the second connection hole 321.

Specifically, the buffer 34 is made of a material with a small buffer coefficient, so that the material cost of the basket transmission system can be saved, and heat transfer can be further blocked. When the cushion member 34 is provided only in the first coupling hole 311 or only in the second coupling hole 321, it is possible to enhance the economy of the transmission structure while securing the coupling stability. When the cushion member 34 is provided in both the first connection hole 311 and the second connection hole 321, the heat insulation performance can be enhanced while securing the connection stability.

With continued reference to fig. 2, in some embodiments, the upper heat insulation shell 11 includes a first butt-joint portion 312 at a joint of the upper heat insulation shell 11 and the lower heat insulation shell 12, the lower heat insulation shell 12 includes a second butt-joint portion 322 at a joint of the upper heat insulation shell 11 and the lower heat insulation shell 12, and the first butt-joint portion 312 and the second butt-joint portion 322 are tightly attached to enclose a cavity described in the above embodiments.

That is to say, thermal-insulated epitheca 11 and thermal-insulated inferior valve 12 are closely laminated through first butt joint portion 312 and second butt joint portion 322, the sealing performance between thermal-insulated epitheca 11 and the thermal-insulated inferior valve 12 has been guaranteed, on the one hand can effectually keep apart between coupling subassembly 3 and output shaft 21 and the driven shaft 4, guarantee its thermal-insulated effect, on the other hand can prevent that coupling subassembly 3 from rotating the heat of in-process because of conduction driving piece 2, make it have great difference in temperature with the inside cold air of refrigerator, and make the inside temperature of cavity contact and liquefy with the inside cold air of ultra-low temperature refrigerator, influence hanging flower basket drive mechanism's work efficiency.

Referring to fig. 1, in some embodiments, the heat insulation casing 1 further includes a sealing ring 13, the first butt joint portion 312 is formed with a first sealing groove 313, and the second butt joint portion 322 is formed with a second sealing groove 323 disposed opposite to the first sealing groove 313. The sealing ring 13 is embedded in the first sealing groove 313 and the second sealing groove 323, so that the first butt-joint portion 312 and the second butt-joint portion 322 are tightly attached.

Specifically, the sealing ring 13 is made of a rubber material, and the sealing ring 13 is embedded in the first sealing groove 313 and the second sealing groove 323, so that the sealing effect between the first butting portion 312 and the second butting portion 322 can be improved, and the heat insulation performance of the heat insulation assembly is improved. The first docking portion 312 and the second docking portion 322 are closely attached, which means that there is a very small gap between the first docking portion 312 and the second docking portion 322, so that heat exchange of the hot and cold air cannot occur at the position where the first docking portion 312 and the second docking portion 322 are attached.

Referring to fig. 3, in some embodiments, the movable sealing member 14 is disposed at a contact position between the upper heat insulation shell 11 and the output shaft 21, and/or the movable sealing member 14 is disposed at a contact position between the lower heat insulation shell 12 and the driven shaft 4, so that the sealing performance of the heat insulation shell 1 is effectively improved, and the heat conduction between the cavity in the heat insulation shell 1 and the outside can be effectively reduced.

It can be understood that the movable sealing member 14 is provided at the contact position of the heat insulating upper case 11 and the output shaft 21 to block heat generated from the operation of the driving part 2, and the movable sealing member 14 is provided at the contact position of the heat insulating lower case 12 and the driven shaft 4 to block cold air from the inside of the ultra-low temperature refrigerator. The simultaneous provision of the dynamic seal 14 at the contact position of the heat-insulating upper shell 11 with the output shaft 21 and at the contact position of the heat-insulating lower shell 12 with the driven shaft 4 enables the heat-insulating housing 1 to have an optimum heat-insulating effect. In addition, the arrangement of the dynamic sealing element 14 can ensure sealing, and meanwhile, the beneficial effects that the transmission function of the output shaft 21 and the driven shaft 4 is not affected and are not possessed by common sealing elements are also achieved.

In some embodiments, dynamic seal 14 is a rubber ring or seal bearing. The cost is low, the types are complete, the output shaft 21 and the driven shaft 4 can be ensured not to be influenced relative to the rotation between the heat insulation shells 1, and a good sealing effect is achieved.

Specifically, in order to ensure effective sealing between the output shaft 21, the driven shaft 4 and the heat-insulating housing 1, when the dynamic seal 14 is a rubber ring, the rubber ring abuts between the output shaft 21 and the heat-insulating upper shell 11, and the rubber ring also abuts between the driven shaft 4 and the heat-insulating lower shell 12. When the dynamic seal 14 is a sealed bearing, the sealed bearing is fixedly connected with the output shaft 21 and the heat-insulating upper shell 11, and the sealed bearing is fixedly connected with the driven shaft 4 and the heat-insulating lower shell 12 by using the sealing function of the sealed bearing.

In a second aspect, referring to fig. 4, the present application further provides an ultra-low temperature refrigerator. Comprises a box body, a basket 5 positioned in the box body and a basket transmission mechanism in any one of the above embodiments. Wherein, the hanging flower basket drive mechanism is fixedly connected with the second end of driven shaft 4 to rotate around the rotation axis under the drive of driven shaft 4. The hanging basket transmission mechanism is installed in the ultra-low temperature refrigerator, so that heat exchange between cold air inside the refrigerator and hot air outside the refrigerator can be effectively blocked, and the temperature inside the ultra-low temperature refrigerator can be continuously maintained within a target temperature range.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (10)

1. The utility model provides a hanging flower basket drive mechanism for ultra-low temperature refrigerator which characterized in that, hanging flower basket drive mechanism includes:

the heat insulation shell comprises a heat insulation upper shell and a heat insulation lower shell which mutually enclose to form a cavity;

an output shaft of the driving piece penetrates through the heat insulation upper shell, and an output end of the output shaft is positioned in the cavity;

a coupling assembly located within the cavity and connected to the output end of the output shaft for rotation about a rotational axis upon actuation of the output shaft; and

the driven shaft penetrates through the heat insulation lower shell; the driven shaft having a first end located within the cavity and a second end located outside of the cavity; the first end is connected with the coupling assembly, and the second end is used for connecting a hanging basket, so that the driven shaft can rotate around the rotating axis under the driving of the coupling assembly.

2. The basket transmission according to claim 1, wherein the coupling assembly comprises a first power disc and a second power disc disposed opposite to each other and fixedly connected;

the first power disc is connected with the output end of the output shaft;

one end of the second power disc, which is far away from the first power disc, is connected with the first end;

wherein the first power disc and the second power disc have a gap therebetween in a direction parallel to the axis of rotation.

3. The basket drive mechanism of claim 2, wherein the coupling assembly further comprises a pin;

the first power disc is provided with a first connecting hole, and the second power disc is provided with a second connecting hole corresponding to the first connecting hole;

the pin penetrates through the first connecting hole and the second connecting hole, so that the second power disc is fixedly connected with the first power disc.

4. The basket transmission according to claim 3, wherein the thermal conductivity of the pins is less than the thermal conductivity of the first power disc and the thermal conductivity of the second power disc.

5. A basket drive according to claim 3, wherein the coupling assembly further comprises a buffer;

the buffer piece is embedded in the first connecting hole and/or the second connecting hole;

the buffer piece is provided with an assembling hole, and the pin penetrates through the assembling hole.

6. The basket transmission mechanism according to claim 1,

the heat insulation upper shell comprises a first butt joint part positioned at the joint of the heat insulation upper shell and the heat insulation lower shell; the heat insulation lower shell comprises a second butt joint part positioned at the joint of the heat insulation upper shell and the heat insulation lower shell;

the first butt joint part is tightly attached to the second butt joint part to enclose the cavity.

7. The basket drive mechanism of claim 6, wherein the insulated housing further comprises a seal ring;

a first sealing groove is formed in the first butt joint part, and a second sealing groove opposite to the first sealing groove is formed in the second butt joint part;

the sealing washer inlays to be located first seal groove with in the second seal groove, so that first butt joint portion with second butt joint portion closely laminates.

8. A basket transmission mechanism according to any one of claims 1 to 7, wherein a dynamic seal is arranged at the contact position of the heat-insulating upper shell and the output shaft, and/or a dynamic seal is arranged at the contact position of the heat-insulating lower shell and the driven shaft.

9. A basket transmission according to claim 8, wherein the dynamic seal is a rubber ring or a seal bearing.

10. An ultra-low-temperature refrigerator, characterized in that the ultra-low-temperature refrigerator comprises:

the hanging basket comprises a box body and a hanging basket positioned in the box body; and

a basket drive mechanism as claimed in any one of claims 1 to 9;

the hanging basket is fixedly connected with the second end of the driven shaft so as to rotate around the rotating axis under the driving of the driven shaft.

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