Clamping mechanism and battery closure device

Abstract

The application discloses a clamping mechanism and a battery sealing device. The clamping mechanism comprises a base body, a plurality of clamping pieces arranged circumferentially around a central axis and movably arranged on the base body, and a first limiting structure fixed to the base body and located on a preset folding path. The first limiting structure is configured to cooperate with a first end of the clamping piece. The first limiting structure is used to form a fulcrum during the folding process, so that the second end of the clamping piece rotates under the action of the fulcrum and gradually clamps the cylindrical battery shell. By rotating and gradually clamping the cylindrical battery shell, the risk of damage to the cylindrical battery shell caused by radial linear extrusion is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a clamping mechanism and a battery sealing device. Background Technology

[0002] In the manufacturing process of cylindrical batteries, the battery casing needs to be sealed. Currently, the commonly used cylindrical battery sealing fixture is a three-lobed fixture. This fixture works by moving radially in a linear fashion to achieve the opening and closing action, thereby clamping the cylindrical battery casing to facilitate subsequent sealing operations.

[0003] However, the clamping method that moves radially in a straight line in the related technology is prone to directly compressing the neck of the cylindrical battery casing during the clamping process, causing damage to the neck of the cylindrical battery casing, such as scratches and deformation. Utility Model Content

[0004] This application provides a clamping mechanism and a battery sealing device that uses a rotary progressive clamping method to reduce the risk of damage to the cylindrical battery casing caused by radial linear compression.

[0005] In a first aspect, embodiments of this application provide a clamping mechanism, comprising: a base; a plurality of clamping members circumferentially arranged around a central axis and movably disposed on the base; the clamping members being used to move towards the central axis along a preset retraction path under the drive of a driving member; a first limiting structure fixed to the base and located on the retraction path, and configured to cooperate with a first end of the clamping member; the first limiting structure being used to form a fulcrum during the retraction process, causing a second end of the clamping member to rotate under the action of the fulcrum and progressively clamp the cylinder. Through rotational progressive clamping, radial linear compression damage to the cylinder is effectively avoided, improving the stability and safety of the clamping.

[0006] Optionally, the first end of the clamping member is provided with a first guide structure, and the first limiting structure slides in engagement with the first guide structure to guide the retraction movement. The sliding engagement design ensures the accuracy of the clamping member's retraction movement and improves clamping precision.

[0007] Optionally, the first guide structure has a first starting end and a first ending end, with the first starting end being closer to the central axis than the first ending end. The first limiting structure, through a limiting engagement with the first ending end of the first guide structure, limits and obstructs the retraction movement. This limiting engagement with the first ending end controls the retraction position of the clamping member, providing a stable fulcrum for subsequent progressive clamping.

[0008] Optionally, a first elastic reset member is also included, connected between the first end point of the first guide structure and the first limiting structure, for resetting the clamping member after the driving member is deactivated. The first elastic reset member enables the clamping member to automatically reset after clamping.

[0009] Optionally, the first end of the clamping member is provided with a protrusion, and a first guide structure is formed on the protrusion; the adjacent clamping member is provided with a groove adapted to the protrusion, and the protrusion and the groove are interlocked to achieve mutual positioning in the axial direction. The interlocking design of the protrusion and the groove ensures the axial positioning of multiple clamping members.

[0010] Optionally, the extension direction of the first guide structure is at a preset angle relative to the radial direction to define the retraction path. This allows the clamping member to better conform to the surface of the cylinder during the retraction process.

[0011] Optionally, the clamping mechanism includes a second limiting structure, fixed to the base and engaging with the second end of the clamping member, for limiting the rotational range of the second end around the first limiting structure. The second limiting structure limits the rotational range of the clamping member.

[0012] Optionally, the clamping member is provided with a second guide structure, and the second limiting structure slides and guides the second guide structure to guide the retraction and rotational movements. The sliding guide cooperation between the second guide structure and the second limiting structure further improves the stability of the clamping member's movement trajectory.

[0013] Optionally, the second guide structure has a second starting end and a second ending end, the second starting end being closer to the central axis than the second ending end, and the second limiting structure limiting the ending position of the rotational motion by engaging with the second ending end of the second guide structure.

[0014] The second endpoint limiter precisely defines the endpoint position of the clamping component's rotational movement, ensuring clamping accuracy.

[0015] Optionally, the clamping mechanism further includes a second elastic reset member connected between the second end point of the second guide structure and the second limiting structure, for resetting the clamping member after the driving member is deactivated. The provision of the second elastic reset member further enhances the clamping member's reset capability.

[0016] Optionally, the base is disposed on one side of multiple clamping members along the central axis and slides in cooperation with the clamping members; the first limiting structure and the second limiting structure are disposed on the side of the base near the clamping members; the first guide structure and the second guide structure are disposed on the side of the clamping members near the base; the base is provided with a through hole for the cylinder to pass through. The rational layout of the base, limiting structure and guide structure improves the stability and reliability of the entire clamping mechanism.

[0017] Optionally, each clamping element has a protrusion on its inner sidewall for engaging and positioning with the annular groove on the outer wall of the cylinder. This engagement and positioning method between the protrusion and the annular groove on the outer wall of the cylinder provides precise axial and radial positioning for the cylinder.

[0018] Secondly, embodiments of this application provide a battery sealing device, including the clamping mechanism described above. By integrating the clamping mechanism, the battery sealing device achieves stable clamping and efficient sealing of the cylindrical battery casing.

[0019] Optionally, the battery sealing device includes: a sleeve, at least partially constituting a driving member, the sleeve having an inner conical surface; the outer wall of the clamping member having an outer conical surface that mates with the inner conical surface; when the sleeve moves relative to the base along the central axis, the clamping member is driven to retract synchronously through the engagement of the inner and outer conical surfaces. The engagement of the inner and outer conical surfaces achieves the conversion from axial movement of the sleeve to radial retraction of the clamping member.

[0020] Optionally, the battery sealing device includes: an upper mold base, fixedly connected to one end of the sleeve; a pressure head, fixedly connected to the upper mold base and located inside the sleeve, the pressure head having a pressing groove for sealing the cylinder; and a lower mold base, at least partially forming the base. The rational layout of the upper mold base, pressure head, and lower mold base ensures the accuracy and efficiency of the sealing operation, improving the quality of battery sealing.

[0021] In this embodiment, the contact method between the clamping member and the cylindrical battery casing is not a simple radial linear compression, but a rotational progressive method. During the clamping process, the clamping member is rotated and progressively clamped by the first limiting structure. The position of the cylindrical battery casing can be adaptively fine-tuned, thereby reducing the risk of damage to the cylindrical battery casing caused by radial linear compression.

[0022] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0024] Figure 1 This is a three-dimensional schematic diagram of the clamping mechanism in the unclamped state provided in the embodiments of this application; Figure 2This is a front view schematic diagram of the clamping mechanism in the unclamped state provided in the embodiments of this application; Figure 3 This application Figure 2 Schematic diagram of section AA in the diagram; Figure 4 This application Figure 3 An enlarged schematic diagram of one of the clamping components; Figure 5 The clamping mechanism provided in this application embodiment is in a clamping state with Figure 3 A schematic diagram of the same cross-sectional location; Figure 6 This is a perspective view of the battery sealing device provided in the embodiments of this application; Figure 7 This is a cross-sectional view of the battery sealing device provided in the embodiments of this application.

[0025] Explanation of reference numerals in the attached figures: 10. Clamping mechanism; 100. Base body; 101. Through hole; 110. Clamping element; 111. First guide structure; 1110. First starting end; 1111. First ending end; 112. Protrusion; 113. Groove; 114. Second guide structure; 1140. Second starting end; 1141. Second ending end; 115. Protrusion; 116. Outer conical surface; 120. First limiting structure; 130. First elastic reset component; 140. Second limiting structure; 150. Second elastic reset component; 20. Battery sealing device; 200. Sleeve; 201. Inner conical surface; 210. Upper mold base; 220. Press head; 221. Press groove; 230. Lower mold base; 240. Driving component; 30. Cylinder. Detailed Implementation

[0026] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0027] In the manufacturing process of cylindrical batteries, the battery casing needs to be sealed. Currently, the commonly used cylindrical battery sealing fixture is a three-lobed fixture. This fixture works by moving radially in a linear fashion to achieve the opening and closing action, thereby clamping the cylindrical battery casing to facilitate subsequent sealing operations.

[0028] However, the clamping method that moves radially in a straight line in the related technology is prone to direct radial straight-line compression on the neck of the cylindrical battery casing during the clamping process, which can easily cause damage to the neck of the cylindrical battery casing, such as scratches and deformation.

[0029] Regarding the above technical issues, firstly, refer to Figures 1 to 3 This application provides a clamping mechanism 10, including: a base 100; a plurality of clamping members 110 arranged circumferentially around a central axis and movably disposed on the base 100; the clamping members 110 are used to move towards the central axis along a preset retraction path under the drive of the driving member 240; a first limiting structure 120 is fixed to the base 100 and located on the retraction path, and configured to cooperate with the first end of the clamping member 110; the first limiting structure 120 is used to form a fulcrum during the retraction process, so that the second end of the clamping member 110 rotates under the action of the fulcrum and progressively clamps the cylinder 30.

[0030] In this embodiment, the contact method between the clamping member 110 and the cylinder 30 is not a simple radial linear compression, but a rotational gradual compression. During the clamping process, the clamping member 110 is rotated and the cylinder 30 is gradually clamped by the first limiting structure 120. The position of the cylinder 30 can be adaptively fine-tuned, thereby reducing the risk of damage to the cylinder 30 caused by radial linear compression.

[0031] For example, the cylinder 30 is designed as a cylindrical battery casing with a recessed neck at its upper end. The inner wall of the clamping member 110 has a protrusion 115 that mates with this recessed neck. As the clamping member 110 rotates and progressively clamps the cylinder 30, the protrusion 115 on the inner wall of the clamping member 110 gradually conforms to the neck of the outer wall of the cylinder 30. Even if there is a slight misalignment between the neck of the cylinder 30 and the protrusion 115 in the initial state, as the protrusion 115 gradually conforms to the neck, the position of the cylindrical battery casing is adaptively fine-tuned, ultimately achieving a stable and conforming clamping state.

[0032] In some embodiments, reference Figures 3 to 5 The clamping member 110 has a first guide structure 111 at its first end, and the first limiting structure 120 slides in cooperation with the first guide structure 111 to guide the retraction movement.

[0033] Specifically, for example, when the first guide structure 111 is designed as a first pin and the first limiting structure 120 is designed as a first guide groove, the first pin extends into the first guide groove. During the process of the driving member 240 driving the clamping member 110 to move towards the central axis along a preset retraction path, the first pin will slide along the trajectory of the first guide groove. Since the shape and orientation of the first guide groove are preset, and the first pin is fixed, the movement trajectory of the first end of the clamping member 110 is restricted.

[0034] In this embodiment, the sliding fit design of the first guide structure 111 and the first limiting structure 120 provides precise guidance for the retraction movement of the clamping member 110, enabling the clamping member 110 to move along a preset path, thus ensuring the accuracy and consistency of the movement of the clamping member 110.

[0035] In some embodiments, reference Figure 4 The first guide structure 111 has a first starting end 1110 and a first ending end 1111. The first starting end 1110 is closer to the central axis than the first ending end 1111. The first limiting structure 120 limits the closing movement by engaging with the first ending end 1111 of the first guide structure 111.

[0036] Specifically, for example, when the first guide structure 111 is designed as a first pin and the first limiting structure 120 is designed as a first guide groove, the first pin extends into the first guide groove. Since the first guide groove is not infinitely extended, it has a first starting end 1110 and a first ending end 1111. When the driving member 240 drives the clamping member 110 to retract, the first pin slides in the first guide groove, and the first pin gradually approaches the first ending end 1111 of the first guide groove. When it contacts the first ending end 1111 of the first guide groove, the first pin cannot continue to slide forward along the first guide groove, thereby restricting the further movement of the first end of the clamping member 110. At this time, the first limiting structure 120 forms a rotation fulcrum.

[0037] In this embodiment, the first limiting structure 120 and the first guiding structure 111 can be used to precisely control the retraction position of the clamping member 110, so that the first limiting structure 120 forms a rotation fulcrum, which facilitates the subsequent progressive clamping action.

[0038] In some embodiments, reference Figures 3 to 5 The clamping mechanism 10 also includes a first elastic reset member 130, which is connected between the first end point 1111 of the first guide structure 111 and the first limiting structure 120, and is used to drive the clamping member 110 to reset after clamping is completed.

[0039] Specifically, for example, the first guide structure 111 is designed as a first pin, the first limiting structure 120 is designed as a first guide groove, and the first elastic reset member 130 is designed as a first spring. The first pin extends into the first guide groove, and the spring is located within the first guide groove, between the first pin and the first end point 1111 of the first guide groove. Before the clamping operation begins, the spring is in a naturally extended state or has a certain pre-compression amount, at which point the clamping member 110 is in its initial position. When the driving member 240 drives the clamping member 110 to move towards the central axis along a preset retraction path, the first pin slides within the first guide groove and gradually approaches the first end point 1111 of the first guide groove, simultaneously squeezing the first spring, causing the spring to compress and deform, storing elastic potential energy. As the clamping member 110 continues to retract, the driving member 240 stops driving after the cylinder 30 is clamped. After the sealing operation of the cylinder 30 is completed, the driving member 240 no longer applies force to the clamping member 110. At this time, the elastic potential energy stored in the first spring due to previous compression is released, the spring begins to extend and generates a reverse elastic force, which is transmitted to the clamping member 110 through the first pin, driving the clamping member 110 to move in the opposite direction to the retraction movement, that is, to move away from the central axis, until the clamping member 110 returns to the initial position, thus achieving reset.

[0040] In this embodiment, the first elastic reset member 130 enables the clamping member 110 to automatically reset after clamping, saving operation time and improving the automation level and operation efficiency of the entire production process.

[0041] In some embodiments, reference Figure 1 , Figure 3 The first end of the clamping member 110 is provided with a protrusion 112, and a first guide structure 111 is formed on the protrusion 112; the adjacent clamping member 110 is provided with a groove 113 adapted to the protrusion 112, and the protrusion 112 and the groove 113 are inserted and engaged to achieve mutual positioning in the axial direction.

[0042] Understandably, when multiple clamping elements 110 are arranged around a central axis and ready to perform a clamping operation, the drive unit 240 starts working, driving each clamping element 110 to retract towards the central axis. During the retraction process, the protrusion 112 on each clamping element 110 gradually approaches the groove 113 on the adjacent clamping element 110. As the retraction action continues, the protrusion 112 and the groove 113 begin to contact and engage. Since the protrusion 112 and the groove 113 are precisely matched, when the protrusion 112 is fully inserted into the groove 113, the two adjacent clamping elements 110 are accurately positioned in the central axial direction. At this time, the multiple clamping elements 110 form a tightly fitted whole in the axial direction, enabling a progressive clamping operation on the cylinder 30 at the same height.

[0043] In this embodiment, the interlocking design of the protrusion 112 and the groove 113 provides precise axial positioning for the multiple clamping members 110, ensuring that all clamping members 110 can apply clamping force to the cylinder 30 at the same height and position. This avoids uneven clamping force caused by axial misalignment of the clamping members 110. For example, for clamping the neck of a cylindrical battery case, precise axial positioning can prevent neck damage caused by clamping misalignment.

[0044] In some embodiments, the extension direction of the first guide structure 111 is at a predetermined angle relative to the radial direction to define the convergence path.

[0045] In this embodiment, when the driving member 240 drives the clamping member 110 to move, since the first guide structure 111 at the first end of the clamping member 110 cooperates with the first limiting structure 120 fixed on the base 100, and the extension direction of the first guide structure 111 is set to have a preset tilt angle relative to the radial direction, the first end of the clamping member 110 is forcibly constrained and can only move along this tilted extension path.

[0046] In the initial stage of the closing movement, the clamping member 110 moves mainly along this inclined path, with its first and second ends moving towards the central axis simultaneously. As the movement continues, the first guide structure 111 at the first end of the clamping member 110 contacts the first end point 1111 of the first limiting structure 120. At this time, the first end of the clamping member 110 will approach the cylinder 30 to be clamped first relative to other parts of the clamping member 110, and the first limiting structure 120 becomes a fulcrum.

[0047] Because the extension direction of the first guide structure 111 is inclined, the movement of the first end of the clamping member 110 is hindered after reaching the fulcrum. Meanwhile, the driving force of the drive member 240 continues to act, and this force, together with the fulcrum, forces the clamping member 110 to stop its linear retraction and instead undergo a lever-like rotational movement around the fulcrum. Finally, the second end of the clamping member 110 rotates inward, thereby gradually clamping the cylinder 30.

[0048] In some embodiments, reference Figures 3 to 5 The clamping mechanism 10 includes a second limiting structure 140, which is fixed to the base 100 and cooperates with the second end of the clamping member 110 to limit the rotation amplitude of the second end around the first limiting structure 120.

[0049] During the closing process of the clamping member 110, the first limiting structure 120 cooperates with the first end of the clamping member 110 to form a fulcrum, causing the second end of the clamping member 110 to rotate under the action of the fulcrum, thereby achieving progressive clamping of the cylinder 30. In this embodiment, the second limiting structure 140 is fixed to the base 100 and cooperates with the second end of the clamping member 110. As the clamping member 110 rotates around the fulcrum formed by the first limiting structure 120, when it rotates to a certain extent, the second end of the clamping member 110 will be blocked by the second limiting structure 140, restricting it from continuing to rotate around the first limiting structure 120, thereby determining the final rotational position of the clamping member 110 and completing the clamping action of the cylinder 30.

[0050] Furthermore, the position or shape of the second limiting structure 140 can be adjusted according to actual needs, thereby changing the rotation amplitude of the clamping member 110 to ensure that a suitable clamping force is applied to the cylinder 30 and to avoid damage to the cylinder 30 due to excessive clamping force.

[0051] In some embodiments, reference Figures 3 to 5 The clamping member 110 is provided with a second guide structure 114, and the second limiting structure 140 slides and guides the second guide structure 114 to guide the retraction and rotation movements.

[0052] In this embodiment, during the retraction movement, the second limiting structure 140 and the second guiding structure 114 slide and guide each other, with the second guiding structure 114 providing guidance for the movement of the clamping member 110. When the first end of the clamping member 110 contacts the first limiting structure 120, the clamping member 110 begins to rotate around the fulcrum formed by the first limiting structure 120. At this time, the second guiding structure 114 continues to slide and guide the second limiting structure 140, continuing to provide guidance for the rotational movement of the clamping member 110, enabling the clamping member 110 to accurately complete the progressive clamping action of the cylinder 30 according to the design requirements.

[0053] In some embodiments, reference Figure 4 The second guide structure 114 has a second starting end 1140 and a second ending end 1141. The second starting end 1140 is closer to the central axis than the second ending end 1141. The second limiting structure 140 limits the endpoint position of the rotational motion by limiting the second ending end 1141 of the second guide structure 114.

[0054] In this embodiment, the second limiting structure 140 and the second end point 1141 of the second guide structure 114 limit each other, which can limit the end point position of the rotational movement of the clamping member 110 and ensure that the protrusion 115 on the inner sidewall of the clamping member 110 fits perfectly with the neck of the outer wall of the cylinder 30.

[0055] In some embodiments, reference Figures 3 to 5 It also includes a second elastic reset member 150, which is connected between the second end point 1141 of the second guide structure 114 and the second limiting structure 140, and is used to drive the clamping member 110 to reset after clamping is completed.

[0056] In this embodiment, before the clamping operation begins, the second elastic reset member 150 is in a pre-compressed state. When the driving member 240 drives the clamping member 110 to perform a retracting movement, the second limiting structure 140 slides within the second guide structure 114, and simultaneously, the second elastic reset member 150 is compressed along with the movement of the clamping member 110. When the first end of the clamping member 110 contacts the first limiting structure 120, the clamping member 110 begins to rotate around the fulcrum formed by the first limiting structure 120 until the second limiting structure 140 reaches the second end point 1141 of the second guide structure 114. During this process, the second elastic reset member 150 is further compressed to its maximum deformation state.

[0057] After the sealing operation is completed, the drive component 240 disengages, and the elastic potential energy stored in the second elastic reset component 150 begins to be released, generating an elastic force that drives the clamping component 110 to reset. This force acts on the second guide structure 114, driving the clamping component 110 to move in the opposite direction to the clamping movement, thus realizing the reset action.

[0058] For example, refer to Figures 3 to 5 The second limiting structure 140 is designed as a second pin and is fixedly installed on the base 100. The second guiding structure 114 is set as a second guiding groove, which is opened on the clamping member 110. The second pin extends into the second guiding groove to provide guidance and limitation for the clamping member 110. The second guiding groove is divided into a continuous first section and a second section, and the direction is adaptively adjusted according to functional requirements. The first section is a straight groove, which is used to guide the initial stage of the retraction movement. The second section guides the rotation of the clamping member 110. The second section can be an arc groove, and the second pin moves along the arc under the guidance of the arc groove. The second section can also be a straight groove. Since there is a gap between the second pin and the straight groove, it can accommodate the arc movement of the second pin. The second elastic reset member 150 is designed as a second spring. The second spring is installed in the second guiding groove and is connected between the second end point 1141 of the second guiding groove and the second pin.

[0059] In some embodiments, reference Figure 1 , Figure 7 Each clamping member 110 has a protrusion 115 on its inner sidewall for engaging and positioning with the annular groove on the outer wall of the cylinder 30.

[0060] In this embodiment, the engagement and positioning method between the protrusion 115 and the annular groove on the outer wall of the cylinder 30 provides precise axial and radial positioning for the cylinder 30, improves the stability of clamping, and ensures the performance of subsequent processing, assembly and other operations.

[0061] For example, the cylinder 30 is a cylindrical battery casing, and the annular groove on the outer wall of the cylinder 30 is the neck of the cylindrical battery casing. The protrusion 115 is provided to clamp the neck of the cylindrical battery casing, which facilitates the subsequent sealing operation.

[0062] In some embodiments, reference Figure 1 , Figure 3 The base 100 is disposed on one side of the plurality of clamping members 110 along the central axis and slides in cooperation with the clamping members 110; the first limiting structure 120 and the second limiting structure 140 are disposed on the side of the base 100 near the clamping members 110; the first guide structure 111 and the second guide structure 114 are disposed on the side of the clamping members 110 near the base 100; the base 100 is provided with a through hole 101 for the cylinder 30 to pass through.

[0063] In this embodiment, at the start of operation, the cylinder 30 is lifted by a lifting device. During the lifting process, the cylinder 30 passes through the through hole 101 on the base 100. At this point, the center of the cylinder 30 coincides with the central axis of the clamping mechanism 10, preparing for subsequent clamping. That is, the through hole 101 on the base 100 provides a central positioning for the cylinder 30, ensuring that the cylinder 30 is accurately positioned on the central axis before clamping. Furthermore, the base 100, as the basic support component of the clamping mechanism 10, along with its sliding fit with the clamping member 110 and the setting of limiting and guiding structures, ensures high stability for the entire structure.

[0064] Secondly, refer to Figure 6 , Figure 7 This application provides a battery sealing device 20, which includes the clamping mechanism 10 described above. Since the battery sealing device 20 of this embodiment includes the clamping mechanism 10 described above, it also has the effects of the clamping mechanism 10 described above.

[0065] In some embodiments, reference Figure 6 , Figure 7 The battery sealing device 20 includes: a sleeve 200, which at least partially constitutes a driving member 240. The sleeve 200 has an inner conical surface 201. The outer wall of the clamping member 110 is provided with an outer conical surface 116 that cooperates with the inner conical surface 201. When the sleeve 200 moves relative to the base 100 along the central axis, the clamping member 110 is driven to retract synchronously through the cooperation of the inner conical surface 201 and the outer conical surface 116.

[0066] In this embodiment, when the battery needs to be sealed, the power unit moves the sleeve 200 axially relative to the clamping member 110. As the sleeve 200 moves, its inner conical surface 201 gradually comes into close contact with the outer conical surface 116 of the clamping member 110. Due to the tapered design of the inner conical surface 201 and the outer conical surface 116, when the sleeve 200 continues to move axially, the inner conical surface 201 will generate a radial component force on the clamping member 110, causing each clamping member 110 to synchronously retract towards the central axis, thereby gradually clamping the cylindrical battery casing located inside the clamping member 110.

[0067] In some embodiments, reference Figure 6 , Figure 7 The battery sealing device 20 includes: an upper mold base 210, which is fixedly connected to one end of the sleeve 200; a pressing head 220, which is fixedly connected to the upper mold base 210 and located inside the sleeve 200, and the pressing head 220 is provided with a pressing groove 221 for sealing the cylinder 30; and a lower mold base 230, which at least partially constitutes the base 100.

[0068] In this embodiment, the upper mold base 210, sleeve 200, and pressure head 220 are fixedly connected to form an integrated module that can move downwards synchronously. During the sealing process, the power device drives the integrated module to move downwards; first, the inner conical surface 201 of the sleeve 200 contacts and cooperates with the outer conical surface 116 of the clamping member 110, driving multiple clamping members 110 to retract and rotate, thereby clamping and fixing the cylindrical battery casing 30; subsequently, as the integrated module continues to move downwards, the pressure head 220 located inside the sleeve 200 contacts the top of the battery and performs a sealing operation on the battery that has been clamped and positioned.

[0069] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A clamping mechanism (10), characterized in that, include: Matrix (100); Multiple clamping elements (110) are circumferentially arranged around a central axis and movably mounted on the base (100); The clamping member (110) is used to move along a preset retraction path toward the central axis under the drive of the driving member (240); A first limiting structure (120) is fixed to the base (100) and located on the retraction path, and is configured to cooperate with the first end of the clamping member (110); The first limiting structure (120) is used to form a fulcrum during the closing process, so that the second end of the clamping member (110) rotates under the action of the fulcrum and gradually clamps the cylinder (30).

2. The clamping mechanism (10) according to claim 1, characterized in that, The clamping member (110) has a first guide structure (111) at its first end, and the first limiting structure (120) slides in cooperation with the first guide structure (111) to guide the retraction movement.

3. The clamping mechanism (10) according to claim 2, characterized in that, The first guide structure (111) has a first starting end (1110) and a first ending end (1111), the first starting end (1110) being closer to the central axis than the first ending end (1111), and the first limiting structure (120) limiting the retraction movement by engaging with the first ending end (1111) of the first guide structure (111).

4. The clamping mechanism (10) according to claim 3, characterized in that, It also includes a first elastic reset member (130), connected between the first end point (1111) of the first guide structure (111) and the first limiting structure (120), for resetting the clamping member (110) after the drive member (240) is deactivated.

5. The clamping mechanism (10) according to claim 2, characterized in that, The first end of the clamping member (110) is provided with a protrusion (112), and the first guide structure (111) is formed on the protrusion (112); The adjacent clamping member (110) is provided with a groove (113) adapted to the protrusion (112), the protrusion (112) and the groove (113) are inserted into each other to achieve mutual positioning in the axial direction.

6. The clamping mechanism (10) according to claim 2, characterized in that, The extension direction of the first guide structure (111) is at a preset angle relative to the radial direction to define the convergence path.

7. The clamping mechanism (10) according to any one of claims 2 to 6, characterized in that, include: The second limiting structure (140) is fixed to the base (100) and cooperates with the second end of the clamping member (110) to limit the rotation amplitude of the second end around the first limiting structure (120).

8. The clamping mechanism (10) according to claim 7, characterized in that, The clamping member (110) is provided with a second guide structure (114), and the second limiting structure (140) slides and guides the second guide structure (114) to guide the retraction movement and the rotation movement.

9. The clamping mechanism (10) according to claim 8, characterized in that, The second guide structure (114) has a second starting end (1140) and a second ending end (1141), the second starting end (1140) being closer to the central axis than the second ending end (1141), and the second limiting structure (140) limitingly engaging with the second ending end (1141) of the second guide structure (114) to limit the end position of the rotational motion.

10. The clamping mechanism (10) according to claim 9, characterized in that, It also includes a second elastic reset member (150), connected between the second end point (1141) of the second guide structure (114) and the second limiting structure (140), for resetting the clamping member (110) after the drive member (240) is deactivated.

11. The clamping mechanism (10) according to claim 7, characterized in that, The base (100) is disposed on one side of the plurality of clamping members (110) along the central axis direction and slides in cooperation with the clamping members (110); The first limiting structure (120) and the second limiting structure (140) are disposed on the side of the base (100) near the clamping member (110); The first guide structure (111) and the second guide structure (114) are disposed on the side of the clamping member (110) near the base (100); The substrate (100) is provided with a through hole (101) for the cylinder (30) to pass through.

12. The clamping mechanism (10) according to any one of claims 1 to 6, characterized in that, Each of the clamping members (110) has a protrusion (115) on its inner sidewall for engaging and positioning with the annular groove on the outer wall of the cylinder (30).

13. A battery sealing device (20), characterized in that, Includes the clamping mechanism (10) as described in any one of claims 1 to 12.

14. The battery sealing device (20) according to claim 13, characterized in that, include: A sleeve (200), which at least partially constitutes the drive member (240), has an inner conical surface (201); The outer wall of the clamping member (110) is provided with an outer conical surface (116) that mates with the inner conical surface (201); When the sleeve (200) moves relative to the base (100) along the central axis, the clamping member (110) is driven to retract synchronously through the cooperation of the inner conical surface (201) and the outer conical surface (116).

15. The battery sealing device (20) according to claim 14, characterized in that, include: The upper mold base (210) is fixedly connected to one end of the sleeve (200); The pressure head (220) is fixedly connected to the upper mold base (210) and located inside the sleeve (200). The pressure head (220) is provided with a pressing groove (221) for sealing the cylinder (30). The lower mold base (230) at least partially constitutes the base (100).

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