Floating docking mechanism, liquid injection device and vacuum pumping device

Abstract

This application provides a floating docking mechanism, a liquid injection device, and a vacuuming device, relating to the field of battery manufacturing technology. The floating docking mechanism includes a housing, a floating component, a stabilizing component, and a joint component. The housing has a first opening; the floating component includes a floating shaft with a first end and a second end, the first end being located inside the housing; the second end passing through the first opening and extending to the outside of the housing; the stabilizing component is located inside the housing and coaxially disposed at the first end of the floating shaft, configured to align the floating shaft radially. The joint component is connected to the housing and configured to align the housing, thereby driving the floating shaft axially. By aligning the floating shaft radially and axially using the stabilizing component and the joint component respectively, the floating shaft is ensured to align radially and axially, thus improving the docking accuracy of the floating docking mechanism.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a floating docking mechanism, a liquid injection device, and a vacuum pumping device. Background Technology

[0002] During the battery manufacturing process, electrolyte needs to be injected into the battery, and air inside the cell also needs to be removed to ensure sealing.

[0003] In related technologies, a floating docking mechanism is required to achieve high-precision docking during the vacuuming and electrolyte injection processes.

[0004] However, during use, mechanical errors can cause the docking accuracy of floating docking mechanisms to deteriorate. Summary of the Invention

[0005] This application provides a floating docking mechanism, a liquid injection device, and a vacuuming device, which can at least solve the technical problem of poor docking accuracy of the floating docking mechanism.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a floating docking mechanism, including:

[0008] A housing having a first opening.

[0009] A floating assembly, the floating assembly including a floating shaft having a first end and a second end, the first end being located inside the housing; the second end passing through the first opening and extending to the outside of the housing.

[0010] A calibrating component is located within the housing and coaxially disposed at the first end of the floating shaft. The calibrating component is configured to calibrate the floating shaft so that the floating shaft returns to its radial direction.

[0011] A joint assembly is disposed on the outside of the housing and on the side where the first end is located. The joint assembly and the locating assembly are coaxially arranged. The joint assembly is configured to locate the housing so as to drive the floating shaft to return to center along the axial direction of the floating shaft through the housing.

[0012] As an optional implementation, the stabilizing component includes a centering structure and a first ball. Along the axial direction of the floating shaft, the centering structure and the first end are disposed opposite each other, and the first ball is located between the centering structure and the first end.

[0013] The number of the first balls is multiple, and the multiple first balls are arranged circumferentially around the floating shaft.

[0014] As an optional implementation, the centering structure has a first end face, and both the first end face and the end face of the first end have an annular groove; on the first end face, the annular groove extends circumferentially along the first end face; on the end face of the first end, the annular groove extends circumferentially along the floating shaft; the first ball is movably disposed within the annular groove of the first end face and the annular groove of the end face of the first end.

[0015] And / or, the centering assembly includes a first retainer located between the centering structure and the first end; the first retainer has first mounting holes, the number of the first mounting holes corresponding to the number of the first balls, the first balls corresponding one-to-one with the first mounting holes, and the first balls being movably disposed in the first mounting holes.

[0016] As an optional implementation, the centering structure includes a positioning plate and a first elastic positioning member. Along the axial direction of the floating shaft, the positioning plate is disposed on the side of the first ball opposite to the floating shaft, and the first elastic positioning member is connected to the side of the positioning plate opposite to the first ball. The number of the first elastic positioning members is at least two, and the at least two first elastic positioning members are symmetrically arranged with respect to the axis of the floating shaft.

[0017] As an optional implementation, the positive stabilizing component is located within the housing.

[0018] And / or, the joint assembly includes a first joint and a second joint, the first joint and the second joint being coaxially arranged and movably connected along the axial direction of the floating shaft; wherein the side of the first joint opposite to the second joint is connected to the housing.

[0019] As an optional implementation, when the floating docking mechanism includes a first joint and a second joint; the floating docking mechanism includes a joint fixing seat, the joint fixing seat is disposed on the side where the first joint is located; the joint fixing seat has a through hole, the first joint passes through the through hole and is connected to the housing; wherein, the through hole is coaxially disposed with the first joint.

[0020] As an optional implementation, the joint fixing seat is provided with a second elastic positioning member, and along the axial direction of the floating shaft, the end of the second elastic positioning member opposite to the joint fixing seat abuts against the housing.

[0021] The number of the second elastic positioning members is at least two, and the at least two second elastic positioning members are symmetrically arranged with respect to the axis of the through hole.

[0022] As an optional implementation, the floating docking mechanism further includes a base, and the housing is disposed on the base along the radial direction of the floating axis.

[0023] The floating docking mechanism further includes a third elastic positioning element, which is connected between the housing and the base; wherein, the number of the third elastic positioning elements is at least two, and the at least two third elastic positioning elements are spaced apart along the axial direction of the floating shaft.

[0024] Along the radial direction of the floating shaft, a sliding portion is provided on the side of the base opposite to the housing, and the sliding portion extends axially along the floating shaft.

[0025] Secondly, this application provides a liquid injection device, comprising:

[0026] A floating docking mechanism, wherein the floating docking mechanism is the floating docking mechanism described in any one of the first aspects.

[0027] The liquid injection connector is connected to the second end of the floating shaft of the floating docking mechanism.

[0028] Thirdly, this application provides a vacuum pumping device, comprising:

[0029] A floating docking mechanism, wherein the floating docking mechanism is the floating docking mechanism described in any one of the first aspects.

[0030] A vacuum connection component is provided, which is connected to the second end of the floating shaft of the floating docking mechanism.

[0031] The floating docking mechanism provided in this application includes a housing, a floating assembly, a locating assembly, and a joint assembly. The housing has a first opening; the floating assembly includes a floating shaft with a first end and a second end, the first end being located inside the housing; the second end passing through the first opening and extending to the outside of the housing; the locating assembly is located inside the housing and coaxially disposed at the first end of the floating shaft, configured to locate the floating shaft radially. The joint assembly is connected to the housing and configured to locate the housing, thereby driving the floating shaft axially. By locating the floating shaft radially and axially with the locating assembly and the joint assembly respectively, the floating shaft is ensured to return to its proper position in both directions, thus improving the docking accuracy of the floating docking mechanism.

[0032] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the floating docking mechanism, liquid injection device, and vacuum pumping device provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the floating docking mechanism provided in the embodiments of this application;

[0035] Figure 2 A front view of the floating docking mechanism provided in an embodiment of this application;

[0036] Figure 3 A cross-sectional view of the floating docking mechanism provided in the embodiments of this application;

[0037] Figure 4 This is a schematic diagram showing the connection between the first joint and the second joint in an embodiment of this application.

[0038] Figure 5 A cross-sectional view of the connection between the first joint and the second joint provided in an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the liquid injection device or vacuum pumping device provided in the embodiments of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100 - Floating docking mechanism;

[0042] 110 - Casing; 111 - First opening;

[0043] 120 - Floating component;

[0044] 121 - Floating shaft; 1211 - First part; 1212 - Second part; 1213 - Third part; 122 - Second ball bearing;

[0045] 123 - Second cage; 124 - Third ball; 125 - Third cage; 126 - Fourth elastic positioning element;

[0046] 130-Positive Deterministic Component;

[0047] 131-Centering structure; 1311-Positioning plate; 1312-First elastic positioning element;

[0048] 132 - First ball; 133 - First cage;

[0049] 140 - Joint assembly; 141 - First joint; 142 - Second joint;

[0050] 160 - Joint fixation seat; 161 - Second elastic positioning element; 162 - Through hole;

[0051] 170 - Base; 180 - Third elastic positioning element; 190 - Sliding part;

[0052] 200 - Liquid injection device; 210 - Liquid injection connector;

[0053] 300 - Vacuum pumping device; 310 - Vacuum pumping connector;

[0054] 400-Driver. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, not all embodiments. Based on the embodiments of this application, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0056] See Figure 1 , Figure 2 , Figure 3 In a first aspect, this application provides a floating docking mechanism 100, comprising: a housing 110, a floating assembly 120, and a stabilizing assembly 130. The housing 110 has a first opening 111; the floating assembly 120 includes a floating shaft 121 having a first end and a second end, the first end being located within the housing 110; the second end passing through the first opening 111 and extending to the outside of the housing 110; the stabilizing assembly 130 is located within the housing 110 and coaxially disposed at the first end of the floating shaft 121, the stabilizing assembly 130 being configured to stabilize the floating shaft 121 so that the floating shaft 121 returns to its radial direction.

[0057] As will be understood by those skilled in the art, in this embodiment of the application, a calibrating component 130 is provided at the first end of the floating shaft 121. The calibrating component 130 calibrates the floating shaft 121 radially to ensure that the floating shaft 121 returns to its radial alignment, thereby improving the docking accuracy of the floating docking mechanism 100.

[0058] See Figure 3 Optionally, the locating component 130 includes a centering structure 131 and a first ball 132. Along the axial direction of the floating shaft 121, the centering structure 131 and the first end are disposed opposite each other, and the first ball 132 is located between the centering structure 131 and the first end. There are multiple first balls 132, and the multiple first balls 132 are arranged circumferentially around the floating shaft 121.

[0059] Understandably, the centering structure 131 and the housing 110 are fixedly connected. The centering structure 131 provides a radial reference center. The first ball 132 is located between the centering structure 131 and the first end of the floating shaft 121. Since the first ball 132 is movable, the floating shaft 121 has a certain amount of movement space relative to the radial reference center of the centering structure 131, so as to adjust the radial center of the floating shaft 121 to make it coincide with the radial reference center, thereby improving the docking accuracy of the floating docking mechanism 100.

[0060] Furthermore, rolling friction exists between the first ball 132 and the centering structure 131, as well as between the first ball 132 and the first end of the floating shaft 121. The resistance is low when the floating shaft 121 is radially aligned via the first ball 132, improving the smoothness of its radial return to center and reducing wear on the floating docking mechanism 100, thus further enhancing its service life and reliability. Simultaneously, the first ball 132 allows the floating shaft 121 to respond to minute alignment deviations, maintaining high-precision centering functionality.

[0061] As an optional implementation, see Figure 3 The centering structure 131 has a first end face, and both the first end face and the end face of the first end have an annular groove (not shown in the figure); on the first end face, the annular groove extends circumferentially along the first end face; on the end face of the first end, the annular groove extends circumferentially along the floating shaft 121; the first ball 132 is movably disposed in the annular groove of the first end face and the annular groove of the end face of the first end. And / or, the centering assembly 130 includes a first retainer 133, the first retainer 133 being located between the centering structure 131 and the first end; the first retainer 133 has a first mounting hole, the number of the first mounting holes corresponding to the number of the first balls 132, the first balls 132 corresponding one-to-one with the first mounting holes, and the first balls 132 being movably disposed in the first mounting holes.

[0062] Thus, in this embodiment of the application, the annular groove on the first end face of the centering structure 131 and the annular groove on the end face of the first end of the floating shaft 121 together restrict the movement and tilting of the first ball 132 along the axial direction of the floating shaft 121, ensuring that the first ball 132 rolls in the first end face and the annular groove of the first end. That is to say, by limiting the first ball 132 through the centering structure 131 and the floating shaft 121, the first ball 132 moves radially without axial movement or angular wobble, thereby ensuring that the floating shaft 121 can return to radial alignment with high precision and stability.

[0063] In addition, this embodiment provides a first retainer 133 between the centering structure 131 and the floating shaft 121. The position of the first ball 132 is restricted by the first mounting hole of the first retainer 133, so that adjacent first balls 132 are kept at intervals, reducing the collision and friction between adjacent balls, thereby reducing noise and wear of the floating docking mechanism 100, improving the reliability and stability of the floating docking mechanism 100, and extending the service life of the floating docking mechanism 100.

[0064] See Figure 3 The centering structure 131 in this embodiment includes a positioning plate 1311 and a first elastic positioning member 1312. Along the axial direction of the floating shaft 121, the positioning plate 1311 is disposed on the side of the first ball 132 away from the floating shaft 121, and the first elastic positioning member 1312 is connected to the side of the positioning plate 1311 away from the first ball 132. The number of first elastic positioning members 1312 is at least two, and the at least two first elastic positioning members 1312 are symmetrically arranged with respect to the axis of the floating shaft 121.

[0065] As will be understood by those skilled in the art, along the axial direction of the floating shaft 121, the first elastic positioning element 1312, the positioning plate 1311, the first ball bearing 132, and the floating shaft 121 are arranged sequentially. The elastic force of the first elastic positioning element 1312 actively acts on the positioning plate 1311 and further transmits the force through the positioning plate 1311 and the first ball bearing 132, thereby achieving radial positivity of the floating shaft 121. Specifically, by symmetrically arranging the first elastic positioning elements 1312 with respect to the axis of the floating shaft 121, each first elastic positioning element 1312 can provide elastic force from multiple angles to posit the radial position of the floating shaft 121.

[0066] It should be noted that the first elastic positioning element 1312 in the embodiments of this application is an elastic positioning bead.

[0067] In this embodiment, the joint assembly 140 is disposed on the outside of the housing 110 and located on the side of the first end. The joint assembly 140 and the locating assembly 130 are coaxially arranged. The joint assembly 140 is configured to locate the housing 110 so as to drive the floating shaft 121 to return to its axial position via the housing 110. In this way, by locating the housing 110 with the joint assembly 140, and by returning the housing 110 to its axial position, the floating shaft 121 is driven to return to its axial position, thereby improving the docking accuracy of the floating docking mechanism 100.

[0068] Optional, see Figure 3 , Figure 4 and Figure 5 The locating component 130 is located inside the housing 110; and / or, the floating docking mechanism 100 further includes a first joint 141 and a second joint 142, which are located outside the housing 110 and on the side where the first end is located; the first joint 141 and the second joint 142 are coaxially arranged and movably connected along the axial direction of the floating shaft 121; wherein, the first joint 141 and the locating component 130 are coaxially arranged, and the side of the first joint 141 opposite to the second joint 142 is connected to the housing 110.

[0069] Thus, through the movable arrangement of the first joint 141 and the second joint 142, the housing 110 has a rotation angle relative to the axial direction, forming an angular floating capability of the housing 110 relative to the axial direction of the floating shaft 121, thereby facilitating the docking of the floating docking mechanism 100 and the workpiece.

[0070] For example, see Figure 4 and Figure 5 The first joint 141 and the second joint 142 can be movably connected by a ball joint, allowing the first joint 141 and the second joint 142 to rotate in all directions. Alternatively, the first joint 141 and the second joint 142 can be connected by a hinge to achieve a movable connection between the first joint 141 and the second joint 142.

[0071] Further, see Figure 2 and Figure 3 The floating docking mechanism 100 includes a joint fixing seat 160, which is disposed on the side where the first joint 141 is located. The joint fixing seat 160 has a through hole 162, through which the first joint 141 passes and is connected to the housing 110. The through hole 162 is coaxially disposed with the first joint 141.

[0072] Optional, see Figure 2 and Figure 3A second elastic positioning member 161 is provided on the joint fixing seat 160. Along the axial direction of the floating shaft 121, the end of the second elastic positioning member 161 facing away from the joint fixing seat 160 abuts against the housing 110. At least two second elastic positioning members 161 are provided, and these two members are symmetrically arranged with respect to the axis of the through hole 162. It can be understood that the elastic force of the second elastic positioning member 161 connected to the joint fixing seat 160 actively acts on the housing 110, causing the housing 110 to actively return to its correct position.

[0073] It should be noted that the second elastic positioning element 161 in this embodiment is an elastic positioning bead.

[0074] Understandably, the first joint 141 moves relative to the second joint 142 to adjust the angle of the housing 110, and the first joint 141 swings in position within the through hole 162. Therefore, in this embodiment, the diameter of the through hole 162 is larger than the maximum outer diameter of the first joint 141, and there is a gap between the hole wall of the through hole 162 and the hole wall of the first joint 141 opposite to it, so as to avoid motion interference between the two.

[0075] Optional, see Figure 2 and Figure 3 The floating docking mechanism 100 also includes a base 170, and a housing 110 is disposed on the base 170 along the radial direction of the floating shaft 121. The floating docking mechanism 100 also includes a third elastic positioning member 180, which is connected between the housing 110 and the base 170. The number of the third elastic positioning members 180 is at least two, and the at least two third elastic positioning members 180 are spaced apart along the axial direction of the floating shaft 121. Along the radial direction of the floating shaft 121, a sliding part 190 is provided on the side of the base 170 opposite to the housing 110, and the sliding part 190 extends along the axial direction of the floating shaft 121.

[0076] Understandably, in this embodiment, a third elastic positioning member 180 is provided between the base 170 and the housing 110. The elastic force of the third elastic positioning member 180 acts on the housing 110 to support the housing 110, reduce the load on the first joint 141, and enhance the structural reliability of the floating docking mechanism 100. It should be noted that the third elastic positioning member 180 in this embodiment is an elastic positioning bead.

[0077] As an optional implementation, the sliding part 190 extends along the axial direction of the floating shaft 121, and the sliding part 190 can be a slide rail, a slide groove, etc. When the floating docking mechanism 100 is applied to the liquid injection device 200 and the vacuuming device 300, the driving member 400 of the liquid injection device 200 and the vacuuming device 300 is connected to the base 170 to drive the base 170 to perform linear reciprocating motion along the axial direction of the floating shaft 121 through the sliding part 190.

[0078] See Figure 3 It should be noted that the floating shaft 121 in this embodiment includes a first part 1211, a second part 1212 and a third part 1213. Along the axial direction of the floating shaft 121, the first part 1211, the second part 1212 and the third part 1213 are arranged and connected in sequence. The end of the first part 1211 away from the second part 1212 forms the first end of the floating shaft 121, and the end of the third part 1213 away from the second part 1212 forms the second end of the floating shaft 121.

[0079] The floating docking mechanism 100 also includes second balls 122 and third balls 124, which are spaced apart along the axial direction of the second portion 1212 between the second portion 1212 and the housing 110. There are multiple second balls 122, arranged sequentially and spaced apart around the axis of the second portion 1212. Similarly, there are multiple third balls 124, also arranged sequentially and spaced apart around the axis of the second portion 1212.

[0080] The floating docking mechanism 100 also includes a second retainer 123 corresponding to the second ball 122. The second retainer 123 is sleeved on the first part 1211, and the second mounting holes on the second retainer 123 correspond one-to-one with the second ball 122. The floating docking mechanism 100 also includes a third retainer 125 corresponding to the third ball 124. The third retainer 125 is sleeved on the second part 1212, and the third mounting holes on the third retainer 125 correspond one-to-one with the third ball 124. Thus, the floating shaft 121 floats radially via the second ball 122, the second retainer 123, the third ball 124, and the third retainer 125.

[0081] The floating docking mechanism 100 in this embodiment also includes a fourth elastic positioning member 126. The fourth elastic positioning member 126 is disposed in the housing 110 and abuts against the radial side of the floating shaft 121 and the outer peripheral wall of the second part 1212. The first part 1211, the second part 1212 and the third part 1213 are rigidly connected. The elastic force of the fourth elastic positioning member 126 acts on the second part 1212 to fix the radial position of the second part 1212, and further fix the radial positions of the first part 1211 and the third part 1213, thereby improving the docking accuracy of the floating docking mechanism 100.

[0082] It should be noted that the functions of the second cage 123 and the third cage 125 are the same as those of the first cage 133, and will not be repeated here.

[0083] It should be noted that the fourth elastic positioning element 126 in the embodiments of this application is an elastic positioning bead.

[0084] Secondly, see Figure 6 This application provides a liquid injection device 200, including: a floating docking mechanism 100 as described in the first aspect and a liquid injection connector 210. The liquid injection connector 210 is connected to the second end of the floating shaft 121 of the floating docking mechanism 100.

[0085] The liquid injection device 200 in this embodiment includes the floating docking mechanism 100 mentioned in the first aspect, which can improve the docking accuracy of the liquid injection device 200.

[0086] Thirdly, see Figure 6 This application provides a vacuuming device 300, including: the floating docking mechanism 100 mentioned in the first aspect and a vacuuming connector 310. The vacuuming connector 310 is connected to the second end of the floating shaft 121 of the floating docking mechanism 100.

[0087] The vacuum pumping device 300 in this embodiment includes the floating docking mechanism 100 mentioned in the first aspect, which can improve the docking accuracy of the vacuum pumping device 300.

[0088] It should be noted that the liquid injection connector 210 and the vacuum connector 310 can be connected to the workpiece via a quick-connect structure.

[0089] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not all embodiments necessarily include that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when describing a specific feature, structure, or characteristic in conjunction with embodiments, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0090] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "one" can be understood to convey either singular or plural usage.

[0091] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0092] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A floating docking mechanism, characterized in that, include: A housing (110) having a first opening (111); A floating assembly (120) includes a floating shaft (121) having a first end and a second end, the first end being located inside the housing (110); the second end passing through the first opening (111) and extending to the outside of the housing (110); A locating component (130) is located inside the housing (110) and coaxially disposed at the first end of the floating shaft (121). The locating component (130) is configured to locate the floating shaft (121) so that the floating shaft (121) returns to its radial direction. A joint assembly (140) is disposed on the outside of the housing (110) and on the side where the first end is located. The joint assembly (140) and the locating assembly (130) are coaxially disposed. The joint assembly (140) is configured to locate the housing (110) so as to drive the floating shaft (121) to return to center along the axial direction of the floating shaft (121) through the housing (110).

2. The floating docking mechanism according to claim 1, characterized in that, The positive stabilizing component (130) includes a centering structure (131) and a first ball (132). Along the axial direction of the floating shaft (121), the centering structure (131) and the first end are disposed opposite to each other, and the first ball (132) is located between the centering structure (131) and the first end. The number of the first ball (132) is multiple, and the multiple first ball (132) are arranged circumferentially around the floating shaft (121).

3. The floating docking mechanism according to claim 2, characterized in that, The centering structure (131) has a first end face, and both the first end face and the end face of the first end have an annular groove; on the first end face, the annular groove extends circumferentially along the first end face; on the end face of the first end, the annular groove extends circumferentially along the floating shaft (121); the first ball (132) is movably disposed in the annular groove of the first end face and the annular groove of the end face of the first end; And / or, the centering component (130) includes a first retainer (133) located between the centering structure (131) and the first end; the first retainer (133) has a first mounting hole, the number of the first mounting holes corresponding to the number of the first balls (132), the first balls (132) corresponding one-to-one with the first mounting holes, and the first balls (132) being movably disposed in the first mounting holes.

4. The floating docking mechanism according to claim 2, characterized in that, The centering structure (131) includes a positioning plate (1311) and a first elastic positioning member (1312). Along the axial direction of the floating shaft (121), the positioning plate (1311) is disposed on the side of the first ball (132) away from the floating shaft (121), and the first elastic positioning member (1312) is connected to the side of the positioning plate (1311) away from the first ball (132). The number of the first elastic positioning members (1312) is at least two, and the at least two first elastic positioning members (1312) are symmetrically arranged with respect to the axis of the floating shaft (121).

5. The floating docking mechanism according to any one of claims 1-4, characterized in that, The positive definite component (130) is located inside the housing (110); And / or, the joint assembly (140) includes a first joint (141) and a second joint (142), the first joint (141) and the second joint (142) being coaxially arranged and movably connected along the axial direction of the floating shaft (121); wherein the side of the first joint (141) opposite to the second joint (142) is connected to the housing (110).

6. The floating docking mechanism according to claim 5, characterized in that, When the floating docking mechanism (100) includes a first joint (141) and a second joint (142); the joint assembly (140) further includes a joint fixing seat (160), which is disposed on the side where the first joint (141) is located; the joint fixing seat (160) has a through hole (162), through which the first joint (141) passes and is connected to the housing (110); wherein the through hole (162) is coaxially disposed with the first joint (141).

7. The floating docking mechanism according to claim 6, characterized in that, The joint fixing seat (160) is provided with a second elastic positioning member (161). Along the axial direction of the floating shaft (121), the end of the second elastic positioning member (161) away from the joint fixing seat (160) abuts against the housing (110). The number of the second elastic positioning member (161) is at least two, and the at least two second elastic positioning members (161) are symmetrically arranged with respect to the axis of the through hole (162).

8. The floating docking mechanism according to any one of claims 1-4, characterized in that, The floating docking mechanism (100) also includes a base (170), and the housing (110) is disposed on the base (170) along the radial direction of the floating shaft (121); The floating docking mechanism (100) further includes a third elastic positioning element (180), which is connected between the housing (110) and the base (170); wherein, the number of the third elastic positioning elements (180) is at least two, and the at least two third elastic positioning elements (180) are spaced apart along the axial direction of the floating shaft (121); Along the radial direction of the floating shaft (121), the base (170) is provided with a sliding part (190) on the side opposite to the housing (110), and the sliding part (190) extends along the axial direction of the floating shaft (121).

9. A liquid injection device, characterized in that, include: A floating docking mechanism (100), wherein the floating docking mechanism (100) is the floating docking mechanism (100) according to any one of claims 1-8; The liquid injection connector (210) is connected to the second end of the floating shaft (121) of the floating docking mechanism (100).

10. A vacuum pumping device, characterized in that, include: A floating docking mechanism (100), wherein the floating docking mechanism (100) is the floating docking mechanism (100) according to any one of claims 1-8; A vacuum connector (310) is connected to the second end of the floating shaft (121) of the floating docking mechanism (100).

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