Limiting mechanism

Abstract

The present application provides a limiting mechanism, which belongs to the field of battery technology. The limiting mechanism includes: a shell, the shell includes a first surface and a second surface opposite to each other in the thickness direction, and a first side surface and a second side surface connecting the first surface and the second surface, the first side surface is located at the first end of the shell, the second side surface is located at the second end of the shell, and the first end and the second end are opposite to each other; and a capsule, the capsule is arranged inside the shell; wherein the dimensions of the first side surface and the second side surface in the thickness direction can be changed according to the volume of the fluid in the capsule to adjust the interval between the first surface and the second surface. The limiting mechanism according to the embodiment of the present application can conveniently adjust its limiting dimensions in the box.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a limiting mechanism. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] When assembling the battery module into the box, a limit mechanism is usually required to control the gap between the battery module and the inner wall of the box. However, after the traditional limit block is tightly attached to the battery module, it is affected by friction, making it difficult to remove it from the box and the blue film of the battery cell in the battery module may be damaged during removal. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a limiting mechanism to effectively solve the problem that the blue film of the battery cell in the battery module is difficult to remove from the box and may be damaged when removing.

[0005] An embodiment of the first aspect of the present application provides a limiting mechanism, comprising: a shell, the shell comprising a first surface and a second surface opposite to each other in a thickness direction, and a first side surface and a second side surface connecting the first surface and the second surface, the first side surface being located at a first end of the shell, the second side surface being located at a second end of the shell, the first end and the second end being opposite to each other; and a capsule, the capsule being arranged inside the shell; wherein the dimensions of the first side surface and the second side surface in the thickness direction can be changed according to the volume of fluid in the capsule to adjust the interval between the first surface and the second surface.

[0006] In the technical solution of the embodiment of the present application, by setting a capsule body inside the outer shell and setting the side of the shell to be changeable in the thickness direction, the limiting mechanism according to the embodiment of the present application can conveniently adjust its size in the thickness direction, thereby effectively solving the problem of being difficult to remove from the box body and the blue film of the battery cell in the battery module that may be damaged when removing.

[0007] In some embodiments, each of the first side surface and the second side surface includes a first portion and a second portion, and the first portion and the second portion can be folded or unfolded relative to each other around a straight line parallel to the first surface and the second surface. Arranging the side surface to include a first portion and a second portion that can be folded or unfolded relative to each other can make the first side surface and the second side surface of the housing have adjustable dimensions in the thickness direction, thereby making the interval between the first surface and the second surface of the limiting mechanism adjustable, so as to adapt to different needs and application scenarios.

[0008] In some embodiments, each of the first side surface and the second side surface includes a hinge mechanism, the hinge mechanism includes a pivot extending along the straight line parallel to the first surface and the second surface, and the first part and the second part are rotatably connected via the pivot. By providing the hinge mechanism, the support stability of the limiting mechanism can be enhanced.

[0009] In some embodiments, the hinge mechanism further includes: at least one first sleeve, which is sleeved on the pivot and fixedly connected to the first part; and at least one second sleeve, which is sleeved on the pivot and fixedly connected to the second part, wherein the pivot is movably hinged with the first sleeve and the second sleeve. The degree of folding or unfolding between the first part and the second part can be adjusted by the hinged connection between the pivot and the sleeve. This enables the limit mechanism to adapt to different needs and usage scenarios.

[0010] In some embodiments, the first sleeve and the second sleeve are alternately sleeved on the pivot. The first sleeve and the second sleeve are alternately sleeved on the pivot so that the limiting mechanism has higher strength and stability.

[0011] In some embodiments, the pivot is arranged at a middle position of each of the first side and the second side, so that the first part and the second part have the same size. Placing the pivot at a middle position of the side can enhance the uniformity and symmetry of the housing.

[0012] In some embodiments, the pivot is arranged at a non-middle position of each of the first side and the second side, so that the first part and the second part have different sizes. Arranging the pivot at a non-middle position of the side can make the limiting mechanism more flexible in use and adaptability.

[0013] In some embodiments, the capsule includes a fluid channel opening, the shell is provided with a fluid channel portion, and the fluid channel opening is connected to the fluid channel portion. By providing the shell with a fluid channel portion connected to the fluid channel opening of the capsule, the capsule can be flushed with fluid, discharged with fluid, and other operations according to different usage requirements.

[0014] In some embodiments, the fluid channel portion includes a fluid filling and discharging nozzle, which protrudes from the housing to form a fluid channel. The fluid filling and discharging nozzle protrudes from the housing to form a fluid channel, which can conveniently perform fluid filling and discharging operations of the capsule without the need for additional interfaces or connectors.

[0015] In some embodiments, the first part and the second part are hard plates. The first part and the second part are hard plates, which can provide better support capabilities for the limiting mechanism in the thickness direction of the shell.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0018] Figure 1 This is a schematic diagram of the structure of the limiting mechanism of some embodiments of the present application;

[0019] Figure 2 A cross-sectional view of the limiting mechanism along the AA' direction of some embodiments of the present application;

[0020] Figure 3 This is a schematic diagram of the structure of the limiting mechanism of some embodiments of the present application;

[0021] Figure 4 A schematic diagram of a portion of the limiting mechanism of some embodiments of the present application; and

[0022] Figure 5 This is a schematic diagram of the structure of part of the limiting mechanism of some embodiments of the present application.

[0023] Description of reference numerals:

[0024] 100 housing, 110 first surface, 120 second surface, 130 first side surface, 140 second side surface;

[0025] 131 Part I, 132 Part II;

[0026] 200 bladder body, 210 fluid filling and discharging nozzle;

[0027] 300 hinge mechanism, 310 pivot shaft, 320 first shaft sleeve, 330 second shaft sleeve;

[0028] D is the thickness direction, L is the straight line. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0035] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0036] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0038] When assembling the battery module into the box, a limit mechanism is required to control the gap between the battery module and the inner wall of the box. However, after the traditional limit block is tightly attached to the battery module, it is affected by friction, making it difficult to remove it from the box and the blue film of the battery cell in the battery module may be damaged when removing it.

[0039] refer to Figure 1-3 , Figure 1 A front view of a limiting mechanism of some embodiments of the present application is shown. Figure 2 shows a cross-sectional view of the limiting mechanism along the AA' direction of some embodiments of the present application, Figure 3 A side view of a limiting mechanism according to some embodiments of the present application is shown.

[0040] The embodiment of the present application provides a limiting mechanism, including: a shell 100 and a capsule 200. The shell 100 includes a first surface 110 and a second surface 120 opposite to each other in the thickness direction D, and a first side surface 130 and a second side surface 140 connecting the first surface 110 and the second surface 120, the first side surface 130 is located at the first end of the shell 100, the second side surface 140 is located at the second end of the shell 100, and the first end and the second end are opposite to each other. The capsule 200 is arranged inside the shell 100. The dimensions of the first side surface 130 and the second side surface 140 in the thickness direction D can be changed according to the volume of the fluid in the capsule 200 to adjust the interval between the first surface 110 and the second surface 120.

[0041] The housing 100 includes a first surface 110 , a second surface 120 , a first side surface 130 , and a second side surface 140 .

[0042] The thickness direction D refers to a direction perpendicular to the first surface 110 and the second surface 120 of the housing 100. The housing 100 also has a first end and a second end opposite to each other. Figure 1 In the example of FIG. 1 , the first end and the second end are two ends opposite to each other in the length direction of the housing 100. Figure 2 The first side surface 130 and the second side surface 140 of the housing 100 are respectively located at the first end and the second end, and are respectively connected to the first surface 110 and the second surface 120 .

[0043] The bladder 200 is disposed inside the housing 100. By allowing external fluid (eg, gas or liquid) to enter therein, the volume of the fluid inside the bladder can be changed.

[0044] According to an embodiment of the present application, the dimensions of the first side surface 130 and the second side surface 140 in the thickness direction D can be changed according to the volume of the fluid in the capsule 200 to adjust the interval between the first surface 110 and the second surface 120. Specifically, when the volume of the fluid inside the capsule 200 increases, the capsule expands, exerting pressure on the first side surface 130 and the second side surface 140, thereby increasing the interval between the first surface 110 and the second surface 120. On the contrary, when the volume of the fluid inside the capsule 200 decreases, the capsule contracts, and the interval between the first surface 110 and the second surface 120 is correspondingly reduced.

[0045] According to the limiting mechanism of the embodiment of the present application, by arranging the capsule in the shell and arranging the side of the shell to be variable in the thickness direction, the limiting size in the box can be conveniently adjusted. In addition, the limiting mechanism according to the embodiment of the present application can effectively solve the problem of being difficult to remove from the box and the blue film of the battery cell in the battery module being damaged when removing.

[0046] According to some embodiments of the present application, each of the first side 130 and the second side 140 includes a first portion 131 and a second portion 132 , which can be folded or unfolded relative to each other around a straight line L parallel to the first surface 110 and the second surface 120 .

[0047] refer to Figure 3 In some embodiments, each of the first side surface 130 and the second side surface 140 includes a first portion 131 and a second portion 132. In some embodiments, the first portion 131 and the second portion 132 may be divided by a straight line L in the side surface that is perpendicular to the thickness direction D and parallel to the first surface 110 and the second surface 120. The first portion 131 and the second portion 132 can be folded or unfolded relative to each other around the straight line L.

[0048] Specifically, when the volume of the fluid inside the balloon 200 increases, the balloon expands, exerts pressure on the first side 130 and the second side 140, and the first portion 131 and the second portion 132 gradually unfold relative to each other around the straight line L. On the contrary, when the volume of the fluid inside the balloon 200 decreases, the balloon contracts, the pressure exerted on the first side 130 and the second side 140 decreases, and the first portion 131 and the second portion 132 gradually fold relative to each other around the straight line L.

[0049] By configuring the side to include a first part and a second part that can be folded or unfolded relative to each other, the first side and the second side of the shell can have adjustable dimensions in the thickness direction, thereby making the interval between the first surface and the second surface of the limiting mechanism adjustable, thereby being able to adapt to different needs and application scenarios.

[0050] According to some embodiments of the present application, each of the first side 130 and the second side 140 includes a hinge mechanism 300, the hinge mechanism 300 includes a pivot 310 extending along a straight line L parallel to the first surface 110 and the second surface 120, and the first part 131 and the second part 132 are rotationally connected via the pivot 310.

[0051] In some embodiments, reference Figure 4 and Figure 5 , each of the first side 130 and the second side 140 of the limiting mechanism may include a hinge mechanism 300. The hinge mechanism 300 includes a pivot 310, which extends along a straight line L parallel to the first surface 110 and the second surface 120. In some embodiments, the pivot 310 may be a rod-like structure or a rotation axis, and passes through the first side 130 and the second side 140.

[0052] The first portion 131 and the second portion 132 can perform a rotational movement about the pivot 310 , so that the first portion 131 and the second portion 132 can be folded and unfolded relative to each other.

[0053] By providing a hinge mechanism, the support stability of the limiting mechanism can be enhanced.

[0054] According to some embodiments of the present application, the hinge mechanism 300 further includes: at least one first sleeve 320 and at least one second sleeve 330. The at least one first sleeve 320 is sleeved on the pivot 310 and fixedly connected to the first portion 131. The at least one second sleeve 330 is sleeved on the pivot 310 and fixedly connected to the second portion 132. The pivot 310 is movably hinged with the first sleeve 320 and the second sleeve 330.

[0055] In some embodiments, continue to refer to Figure 4 and Figure 5 , Figure 4 shows a schematic structural diagram of the hinge mechanism of some embodiments of the present application in a folded state, Figure 5 A schematic structural diagram of the hinge mechanism in some embodiments of the present application in an unfolded state is shown.

[0056] The hinge mechanism 300 further includes at least one first sleeve 320 and at least one second sleeve 330. In some embodiments, the first sleeve 320 and the second sleeve 330 can be sleeved on the pivot 310 and fixedly connected to the first part 131 and the second part 132 respectively, so that the first part 131 and the second part 132 can be folded and unfolded relative to each other.

[0057] In some embodiments, the pivot 310 may be used as a central axis to allow the first sleeve 320 and the second sleeve 330 to rotate therearound, thereby achieving rotational movement of the first portion 131 and the second portion 132 .

[0058] The degree of folding or unfolding between the first part and the second part can be adjusted by the movable hinge connection between the pivot and the shaft sleeve, so that the limiting mechanism can adapt to different needs and usage scenarios.

[0059] According to some embodiments of the present application, the first sleeves 320 and the second sleeves 330 are alternately sleeved on the pivot 310 .

[0060] In some embodiments, continue to refer to Figure 4 and Figure 5 The hinge mechanism 300 further includes two or more (eg, three) first sleeves 320 and two or more (eg, two) second sleeves 330 , wherein the plurality of first sleeves 320 and the plurality of second sleeves 330 may be alternately sleeved on the pivot 310 .

[0061] The first sleeve and the second sleeve are alternately sleeved on the pivot shaft, so that the limiting mechanism has higher strength and stability.

[0062] According to some embodiments of the present application, the pivot 310 is disposed at a middle position of each of the first side surface 130 and the second side surface 140 , such that the first portion 131 and the second portion 132 have the same size.

[0063] In some embodiments, reference Figure 3-Figure 5 , the pivot 310 is disposed at a middle position of each of the first side surface 130 and the second side surface 140 in the width direction D such that the distances between the pivot 310 and the first surface 110 and the second surface 120 are the same.

[0064] Placing the pivot in the middle of the side surface can enhance the uniformity and symmetry of the housing.

[0065] According to some embodiments of the present application, the pivot 310 is disposed at a non-middle position of each of the first side surface 130 and the second side surface 140 , so that the first portion 131 and the second portion 132 have different sizes.

[0066] In some embodiments, the pivot 310 may also be disposed at a non-middle position of each of the first side surface 130 and the second side surface 140 , such that the pivot 310 is closer to one of the first surface 110 and the second surface 120 .

[0067] Arranging the pivot at a non-middle position on the side can make the limiting mechanism more flexible in use and adaptable.

[0068] According to some embodiments of the present application, the capsule 200 includes a fluid channel opening, a fluid channel portion is provided on the shell 100, and the fluid channel opening is communicated with the fluid channel portion.

[0069] In some embodiments, the capsule 200 includes a fluid channel port for introducing external fluid. In some embodiments, the fluid channel port can be located at the side or top of the capsule 200. The fluid channel port is connected to the fluid channel portion on the housing 100, so that the external fluid can enter the fluid channel port of the capsule 200 from the fluid channel portion on the housing 100.

[0070] By providing the shell with a fluid channel portion that is connected to the fluid channel opening of the bladder, the bladder can be filled with fluid, discharged with fluid, and other operations according to different usage requirements.

[0071] According to some embodiments of the present application, the fluid channel portion includes a fluid filling and discharging nozzle 210 , and the fluid filling and discharging nozzle 210 protrudes from the housing 100 to form a fluid channel.

[0072] In some embodiments, reference Figure 1-Figure 3 , the fluid filling and discharging nozzle 210 of the housing 100 protrudes from the housing 100, thereby forming a fluid channel.

[0073] The fluid filling and discharging nozzle protrudes from the shell and forms a fluid channel, so that the fluid filling and discharging operation of the capsule can be conveniently performed without the need for additional interfaces or connectors.

[0074] According to some embodiments of the present application, the first part 131 and the second part 132 are hard plates.

[0075] In some embodiments, the first portion 131 and the second portion 132 may be hard plates.

[0076] The first part and the second part are hard plates, which can provide better support for the limiter in the thickness direction of the shell.

[0077] The limiting mechanism of the present application is further described below in conjunction with specific embodiments.

[0078] refer to Figure 1-Figure 3 The limiting mechanism includes: a shell 100 and a capsule 200. The shell 100 includes a first surface 110 and a second surface 120 opposite to each other in a thickness direction D, and a first side surface 130 and a second side surface 140 connecting the first surface 110 and the second surface 120. The first side surface 130 is located at a first end of the shell 100, and the second side surface 140 is located at a second end of the shell 100, and the first end and the second end are opposite to each other. Each of the first side surface 130 and the second side surface 140 includes a first portion 131 and a second portion 132.

[0079] Each of the first side surface 130 and the second side surface 140 further includes a hinge mechanism 300. The hinge mechanism 300 includes a pivot 310, three first sleeves 320, and two second sleeves 330. The pivot 310 is arranged at a middle position of each of the first side surface 130 and the second side surface 140, so that the distances between the pivot 310 and the first surface 110 and the second surface 120 are the same. The three first sleeves 320 and the two second sleeves 330 are alternately sleeved on the pivot 310, wherein the three first sleeves 320 are fixedly connected to the first portion 131, and the two second sleeves 330 are fixedly connected to the second portion 132. The pivot 310 is movably hinged with the first sleeves 320 and the second sleeves 330.

[0080] The shell 100 is also provided with a fluid filling and discharging nozzle 210 . The fluid filling and discharging nozzle 210 protrudes from the shell 100 to form a fluid channel and is in communication with the capsule 200 .

[0081] When the fluid is filled into the capsule 200 in the limiting mechanism via the fluid filling and discharging nozzle 210, the volume of the fluid inside the capsule increases. The capsule expands to apply pressure to the first side surface 130 and the second side surface 140, and the first part 131 and the second part 132 gradually unfold relative to each other around the pivot 310 via the hinge mechanism 300. The dimensions of the first side surface 130 and the second side surface 140 in the thickness direction D gradually increase, and the interval between the first surface 110 and the second surface 120 also gradually increases until the first part 131 and the second part 132 are fully unfolded.

[0082] When the fluid filling and discharging nozzle 210 is opened to discharge the fluid from the capsule 200 in the limiting mechanism, the volume of the fluid inside the capsule 200 decreases. The capsule contracts, the pressure applied to the first side surface 130 and the second side surface 140 gradually decreases, and the first part 131 and the second part 132 gradually fold relative to each other around the pivot 310 via the hinge mechanism 300. The dimensions of the first side surface 130 and the second side surface 140 in the thickness direction D gradually decrease, and the interval between the first surface 110 and the second surface 120 also gradually decreases until the first part 131 and the second part 132 are completely folded relative to each other.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A limiting mechanism, characterized in that: include: A shell (100), the shell (100) comprising a first surface (110) and a second surface (120) opposite to each other in a thickness direction (D), and a first side surface (130) and a second side surface (140) connecting the first surface (110) and the second surface (120), the first side surface (130) being located at a first end of the shell (100), the second side surface (140) being located at a second end of the shell (100), the first end and the second end being opposite to each other; and A capsule (200), wherein the capsule (200) is arranged inside the shell (100); The dimensions of the first side surface (130) and the second side surface (140) in the thickness direction (D) can be changed according to the volume of the fluid in the capsule (200) to adjust the interval between the first surface (110) and the second surface (120).

2. The limiting mechanism according to claim 1, characterized in that: Each of the first side surface (130) and the second side surface (140) includes a first portion (131) and a second portion (132), and the first portion (131) and the second portion (132) are capable of being folded or unfolded relative to each other around a straight line (L) parallel to the first surface (110) and the second surface (120).

3. The limiting mechanism according to claim 2, characterized in that: Each of the first side surface (130) and the second side surface (140) includes a hinge mechanism (300), the hinge mechanism (300) includes a pivot (310) extending along the straight line (L) parallel to the first surface (110) and the second surface (120), and the first part (131) and the second part (132) are rotationally connected via the pivot (310).

4. The limiting mechanism according to claim 3, characterized in that: The hinge mechanism (300) further comprises: at least one first sleeve (320), sleeved on the pivot (310) and fixedly connected to the first part (131); and at least one second sleeve (330), sleeved on the pivot (310) and fixedly connected to the second part (132), Wherein, the pivot (310) is movably hinged with the first shaft sleeve (320) and the second shaft sleeve (330).

5. The limiting mechanism according to claim 4, characterized in that: The first shaft sleeve (320) and the second shaft sleeve (330) are alternately sleeved on the pivot shaft (310).

6. The limiting mechanism according to any one of claims 3 to 5, characterized in that: The pivot (310) is disposed at a middle position of each of the first side surface (130) and the second side surface (140) such that the first portion (131) and the second portion (132) have the same size.

7. The limiting mechanism according to any one of claims 3 to 5, characterized in that: The pivot (310) is disposed at a non-intermediate position of each of the first side (130) and the second side (140), so that the first portion (131) and the second portion (132) have different sizes.

8. The limiting mechanism according to any one of claims 1 to 5, characterized in that: The capsule (200) comprises a fluid channel opening, a fluid channel portion is provided on the shell (100), and the fluid channel opening is in communication with the fluid channel portion.

9. The limiting mechanism according to claim 8, characterized in that: The fluid channel portion comprises a fluid filling and discharging nozzle (210), and the fluid filling and discharging nozzle (210) protrudes from the housing (100) to form a fluid channel.

10. The limiting mechanism according to any one of claims 2 to 5, characterized in that: The first part (131) and the second part (132) are hard plates.

Images