Pressure maintaining device
By designing a flexible contact pressure head assembly, the problem of interference between the pressure holding device and the product was solved, achieving high-precision pressure holding operation, improving yield, and reducing costs.
Patent Information
- Application Number
- CN202422833598.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Existing pressure-holding devices are prone to interference when used with products, leading to poor pressure holding or scratching and damaging the products, reducing yield and increasing production costs.
A pressure-holding device including a pressure plate and a pressure head assembly is designed. The pressure head assembly consists of a support plate, a movable plate, a floating plate, and a pressure head. It utilizes elastic components and a convex-concave spherical structure to achieve flexible contact and adaptively adjust the angle and position of the pressure head relative to the product, thereby mitigating rigid impact forces.
It improves the fit between the pressure head and the product, avoids interference and scratches, increases the yield rate, and reduces production costs.
Smart Images
Figure CN223578437U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a pressure maintaining equipment technical field, specifically, relate to a pressure maintaining device. BACKGROUND
[0002] At present, automation equipment has become indispensable production tool for improving production efficiency and guaranteeing product quality, and common automation equipment includes pressure maintaining equipment. Among them, the pressure maintaining equipment is mainly applied after the point gluing and pasting section or product pre-folding section, and through the process of maintaining the product, the purpose of strengthening the shaping is achieved to consolidate the pasting or bending effect.
[0003] However, since the pressure maintaining device and the product have the requirement of multiple degrees of freedom cooperation, when the cooperation precision cannot meet the requirement, the pressure maintaining device is prone to interference with the product during the pressure maintaining process, resulting in poor pressure maintaining, even scratching and damaging the product, which not only reduces the yield, but also increases the production cost. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a pressure maintaining device to solve the technical problem that the existing pressure maintaining device is prone to interference with the product during the pressure maintaining process, thereby leading to poor pressure maintaining or even scratching and damaging the product.
[0005] The pressure maintaining device provided by the utility model comprises a pressure plate and a pressure head assembly.
[0006] The pressure plate is movable along the pressure applying direction.
[0007] The pressure head assembly comprises a support plate, a movable plate, a floating plate and a pressure head, the support plate is spaced apart from the pressure plate along the pressure applying direction and is fixed relative to the pressure plate, the movable plate is spaced apart from the support plate along the pressure applying direction and is connected through a first elastic assembly, the first elastic assembly is used for making the movable plate always have a tendency to move away from the support plate, the floating plate is located between the support plate and the movable plate, and the pressure head is fixedly arranged on the floating plate, wherein one of the floating plate and the movable plate is provided with a convex spherical surface, the other of the floating plate and the movable plate is provided with a concave spherical surface matched with the convex spherical surface, and the floating plate and the movable plate are connected through a second elastic assembly, and the second elastic assembly is used for making the movable plate and the floating plate always have a tendency to approach each other.
[0008] Further, the second elastic assembly is provided with a plurality of groups, and the plurality of groups of second elastic assemblies are dispersedly arranged, the second elastic assembly comprises a tension spring, one end of the tension spring is connected with the movable plate, and the other end of the tension spring is connected with the floating plate.
[0009] Further, the movable plate is provided with a first hole penetrating along the pressing direction, and the floating plate is provided with a second hole opposite to the first hole along the pressing direction; the second elastic component further comprises a fixing pin and a hook, wherein the fixing pin is installed through the first hole, and one end of the tension spring is hooked to the fixing pin; the hook is arranged on the floating plate, and the other end of the tension spring is hooked to the hook slot.
[0010] Further, the second elastic component further comprises a sleeve ring and a locking nut, the sleeve ring is arranged on the side of the floating plate away from the movable plate, and the center hole of the sleeve ring is opposite to the second hole; the hook further comprises an external thread segment, the hook slot is accommodated in the sleeve ring, the external thread segment is exposed by the sleeve ring, the locking nut is screw-connected with the external thread segment, and the end surface of the locking nut is in abutment with the sleeve ring.
[0011] Further, the side of the floating plate away from the movable plate is provided with an accommodating groove, and the sleeve ring is inserted into the accommodating groove.
[0012] Further, the pressure head assembly further comprises a ball, the side of the floating plate facing the movable plate is provided with a groove, the ball is embedded in the groove, and the surface of the ball forms the convex spherical surface; the concave spherical surface is arranged on the side of the movable plate facing the floating plate.
[0013] Further, the pressure head assembly further comprises a fixed plate and a plurality of fixed columns, the fixed plate is detachably installed on the pressing plate, the plurality of fixed columns are fixedly connected between the support plate and the fixed plate, and the plurality of fixed columns are dispersedly arranged.
[0014] Further, the first elastic component comprises a guide column, a guide sleeve, a spiral spring, a limiting block and a locking screw, wherein the support plate is provided with a guide hole, the floating plate is provided with a first gap opposite to the guide hole, one end of the guide column is fixedly connected with the movable plate, the guide column penetrates through the first gap, and the guide column is provided with an annular flange; the spiral spring is sleeved on the other end of the guide column, one end of the spiral spring is in abutment with the annular flange, the other end of the spiral spring is in abutment with the limiting block, the limiting block is provided with a fixed hole opposite to the guide column, and the locking screw is arranged on the side of the limiting block away from the spiral spring; the screw rod segment of the locking screw is screwed into the guide column through the fixed hole, and the screw nut segment of the locking screw is in abutment with the limiting block.
[0015] Further, the pressure head assembly further comprises a pressure sensor fixedly arranged on one side of the limiting block facing the pressing plate, the fixed plate is provided with a second accommodating opening, the pressure sensor is accommodated in the second accommodating opening, and the sensing part of the pressure sensor faces the pressing plate.
[0016] Further, the pressure maintaining device further comprises a mounting plate, a driving cylinder and a plurality of supporting columns, the mounting plate is spaced apart from the pressing plate along the pressing direction, and the mounting plate is located on the side of the pressing plate away from the pressure head assembly; the plurality of supporting columns are fixedly connected to the mounting plate, and the pressing plate is in sliding fit with the plurality of supporting columns along the pressing direction; the cylinder body of the driving cylinder is mounted on the mounting plate, and the cylinder rod of the driving cylinder is connected with the pressing plate.
[0017] The pressure maintaining device brings the beneficial effects that:
[0018] When the pressure maintaining operation is needed, the pressing plate can be moved along the pressing direction to approach the product; along with the continuous approach of the pressing plate to the product, the pressure head assembly arranged on the pressing plate will gradually contact the product. The pressure head assembly contacts the product through the pressure head, and in the process of contacting the product to apply pressure to the product, the reaction force is transmitted to the floating plate through the pressure head, the mutually matched convex spherical surface and concave spherical surface arranged between the floating plate and the movable plate, and the action of the second elastic assembly, so that the pressure head forms a flexible contact around the product surface to realize the self-adaptive adjustment of the pressure head angle, so that the pressure head is more closely attached to the product to improve the fitting precision of the pressure head and the product; at the same time, under the action of the above-mentioned reaction force, the floating plate also drives the movable plate to compress the first elastic assembly, and forms a flexible contact with the product surface in the direction of applying pressure to the product, so as to relieve the rigid impact force between the pressure head and the product, thereby protecting the product.
[0019] Therefore, through the above-mentioned arrangement, the pressure maintaining device can not only realize the flexible contact of the pressure head with the product in the pressing direction by the first elastic assembly, but also realize the flexible contact of the pressure head with the product around the pressing direction by the second elastic assembly and the mutually matched convex spherical surface and concave spherical surface, so that the fitting precision between the pressure head and the product is higher, and the situation that the product is interfered with due to the occurrence of jamming during the pressure maintaining process to cause poor pressure maintaining and even scratch and damage the product is avoided, the yield is improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.
[0021] Figure 1 The position layout schematic view of the pressure maintaining device provided by the embodiment of the present application relative to the clamp is shown in the figure.
[0022] Figure 2 The structure schematic view of the pressure head assembly of the pressure maintaining device provided by the embodiment of the present application is shown in the figure.
[0023] Figure 3 The top view schematic view of the pressure head assembly of the pressure maintaining device provided by the embodiment of the present application is shown in the figure.
[0024] Figure 4 The A-A sectional view in the figure. Figure 3
[0025] The B-B sectional view in the figure. Figure 5 Figure 3 The C-C sectional view in the figure.
[0026] Figure 6 Figure 3 The figure.
[0027] Explanation of figure mark:
[0028] 010-pressing plate; 020-pressure head assembly; 030-mounting plate; 040-driving cylinder; 050-supporting column; 060-clamp;
[0029] 100-supporting plate; 200-moving plate; 300-floating plate; 400-pressure head; 500-first elastic assembly; 600-second elastic assembly; 700-rolling ball; 810-fixing plate; 811-second accommodation opening; 820-fixing column; 900-pressure sensor; 910-sensing part;
[0030] 210-first hole; 220-concave spherical surface;
[0031] 310-second hole; 320- accommodating groove; 330-groove; 340-first accommodation opening;
[0032] 510-guiding column; 511-annular flange; 520-guiding sleeve; 530-spiral spring; 540-limiting block; 550-locking screw;
[0033] 610-tension spring; 620-fixing pin; 630-hook; 640-sleeve ring; 650-locking nut. Detailed Implementation
[0034] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.
[0035] Figure 1 This is a schematic diagram showing the positional layout of the pressure-holding device relative to the fixture 060 provided in this embodiment; Figure 2 This is a schematic diagram of the pressure head assembly 020 of the pressure holding device provided in this embodiment; Figure 3 This is a top view of the pressure head assembly 020 of the pressure holding device provided in this embodiment. Figures 1 to 3 As shown, this embodiment provides a pressure-holding device, including a pressure plate 010 and a pressure head assembly 020. Specifically, the pressure plate 010 is movable along the pressure direction; the pressure head assembly 020 includes a support plate 100, a movable plate 200, a floating plate 300, and a pressure head 400. The support plate 100 and the pressure plate 010 are spaced apart and relatively fixed along the pressure direction; the movable plate 200 and the support plate 100 are spaced apart along the pressure direction and connected by a first elastic component 500. The first elastic component 500 is used to ensure that the movable plate 200 always has a tendency to move away from the support plate 100; the floating plate 300 is located between the support plate 100 and the movable plate 200, and the pressure head 400 is fixedly disposed on the floating plate 300.
[0036] Figure 4 for Figure 3 Sectional view AA in [the document]. Please continue to refer to [the document]. Figure 2 and combined Figure 4 One of the floating plate 300 and the movable plate 200 is provided with a convex spherical surface, and the other of the floating plate 300 and the movable plate 200 is provided with a concave spherical surface 220 that mates with the convex spherical surface. The floating plate 300 and the movable plate 200 are connected by a second elastic component 600, which is used to ensure that the movable plate 200 and the floating plate 300 always tend to move closer to each other.
[0037] It should be noted that in this embodiment, the "pressure direction" can be determined by... Figure 1 The arrow 's' in the diagram represents this.
[0038] When a pressure-holding operation is required on the product, where the product is fixed by clamp 060, the pressure plate 010 can be moved along the pressure direction (i.e., along...). Figure 1The product is gradually approached (indicated by the arrow s), and the pressure head assembly 020 arranged on the pressure plate 010 will gradually contact the product as the pressure plate 010 continuously approaches the product. The pressure head assembly 020 contacts the product through the pressure head 400. During the process of the pressure head 400 contacting the product to apply pressure to the product, the reaction force will be transmitted to the floating plate 300 through the pressure head 400. By using the matched convex spherical surface and concave spherical surface 220 arranged between the floating plate 300 and the movable plate 200, and the action of the second elastic assembly 600, the pressure head 400 forms a flexible contact around the product surface to realize self-adaptive adjustment of the angle of the pressure head 400, so that the pressure head 400 is more closely attached to the product, thereby improving the fitting accuracy of the pressure head 400 and the product. At the same time, under the action of the above-mentioned reaction force, the floating plate 300 also drives the movable plate 200 to compress the first elastic assembly 500, and forms a flexible contact with the product surface in the direction of applying pressure to the product, so as to relieve the rigid impact force between the pressure head 400 and the product, thereby protecting the product.
[0039] As can be seen, through the above arrangement, the pressure maintaining device can not only realize the flexible contact of the pressure head 400 with the product in the pressure applying direction by using the first elastic assembly 500, but also realize the flexible contact of the pressure head 400 with the product around the pressure applying direction by using the second elastic assembly 600 and the matched convex spherical surface and concave spherical surface 220, so that the fitting accuracy between the pressure head 400 and the product is higher, and the situation of poor pressure maintaining or even scratching and damaging the product due to interference during pressure maintaining is avoided, thereby improving the yield rate and reducing the production cost.
[0040] Figure 5 For Figure 3 B-B sectional view. Please continue to refer to Figure 2 , and in combination with Figure 5 In the embodiment, the second elastic assembly 600 is arranged in multiple groups and is arranged in a scattered manner. The second elastic assembly 600 includes a tension spring 610, wherein one end of the tension spring 610 is connected with the movable plate 200, and the other end of the tension spring 610 is connected with the floating plate 300.
[0041] By arranging the tension spring 610 connecting the movable plate 200 and the floating plate 300 in the second elastic assembly 600, the movable plate 200 and the floating plate 300 always have a tendency to approach each other under the elastic restoring force of the tension spring 610, thereby connecting the movable plate 200 and the floating plate 300 together. By arranging the second elastic assembly 600 in multiple groups in a scattered manner, the connection points of the movable plate 200 and the floating plate 300 are increased, so that the swing amplitude of the floating plate 300 will not be too large when the pressure head 400 is attached to the product.
[0042] Specifically, the second elastic assembly 600 is provided with four groups, and the four groups of second elastic assemblies 600 are arranged in a rectangular shape.
[0043] Please continue to refer to Figure 5 In the embodiment, the movable plate 200 is provided with a first hole 210 penetrating along the pressing direction, and the floating plate 300 is provided with a second hole 310 opposite to the first hole 210 along the pressing direction; the second elastic assembly 600 can further include a fixed pin 620 and a hook 630, wherein the fixed pin 620 is installed through the first hole 210, and one end of the tension spring 610 is hooked to the fixed pin 620; the hook 630 is arranged on the floating plate 300, and the other end of the tension spring 610 is hooked to the hook groove of the hook 630.
[0044] The structure of the second elastic assembly 600 not only realizes reliable connection between the floating plate 300 and the movable plate 200 by using the tension spring 610 to provide elastic force for the two to approach each other, but also can accommodate the tension spring 610 by using the first hole 210 and the second hole 310, which can provide guidance for the extension and deformation process of the tension spring 610 on the one hand to prevent the tension spring 610 from being bent, and on the other hand can save the space between the movable plate 200 and the floating plate 300, thereby facilitating the compact design of the pressure head assembly 020.
[0045] Please continue to refer to Figure 5 In the embodiment, the second elastic assembly 600 can further include a sleeve ring 640 and a locking nut 650, specifically, the sleeve ring 640 is arranged on the side of the floating plate 300 away from the movable plate 200, and the center hole of the sleeve ring 640 is opposite to the second hole 310; the hook 630 further includes an external thread section, wherein the hook groove is accommodated in the sleeve ring 640, the external thread section is exposed from the sleeve ring 640, the locking nut 650 is screw-connected with the external thread section, and the end surface of the locking nut 650 abuts against the sleeve ring 640.
[0046] When the second elastic assembly 600 needs to be assembled, the fixed pin 620 can be installed through the first hole 210, at this time, the fixed pin 620 is substantially perpendicular to the hole axis of the first hole 210; then, one end of the tension spring 610 can be hooked on the fixed pin 620, and a section of the tension spring 610 can be accommodated in the first hole 210; after that, the other end of the tension spring 610 can be connected with the hook groove of the hook 630, and the sleeve ring 640 can be sleeved outside the hook 630, and then the locking nut 650 can be screwed on the external thread section of the hook 630. Similarly, when the second elastic assembly 600 needs to be disassembled, only the process opposite to the above process needs to be operated.
[0047] The installation of the tension spring 610 by the cooperation of the locking nut 650 and the collar 640 can not only ensure the installation space of the tension spring 610, but also realize the detachable installation of the tension spring 610, facilitate the replacement of the tension spring 610, and adjust the pre-tightening force of the tension spring 610 by adjusting the screwing cooperation length of the outer threaded section of the locking nut 650 and the hook 630, so that the floating plate 300 and the movable plate 200 have different elastic restoring forces.
[0048] Please continue to refer to Figure 5 In the embodiment, the accommodating groove 320 can be formed on the side of the floating plate 300 away from the movable plate 200, and the collar 640 is inserted into the accommodating groove 320.
[0049] The arrangement of the accommodating groove 320 can not only pre-position the collar 640 during the installation of the collar 640 to ensure the position of the tension spring 610, but also limit the collar 640 in the radial direction to prevent the displacement of the collar 640.
[0050] Please continue to refer to Figure 4 In the embodiment, the pressure head assembly 020 can further include a ball 700. Specifically, the side of the floating plate 300 facing the movable plate 200 is provided with a recess 330, the ball 700 is embedded in the recess 330, and the surface of the ball 700 is formed as a convex spherical surface. The concave spherical surface 220 is formed on the side of the movable plate 200 facing the floating plate 300.
[0051] The surface of the ball 700 is formed as a convex spherical surface, which eliminates the complicated operation of spherical surface processing of the floating plate 300, and is conducive to reducing the manufacturing cost. In addition, by forming the recess 330 for installing the ball 700 on the floating plate 300, the ball 700 can be limited to prevent it from falling off between the floating plate 300 and the movable plate 200.
[0052] In other embodiments, the concave spherical surface 220 can be formed on the side of the floating plate 300 facing the movable plate 200, and the ball 700 can be arranged on the movable plate 200.
[0053] Please continue to refer to Figure 4 and Figure 5 In the embodiment, the pressure head assembly 020 can further include a fixed plate 810 and a plurality of fixed columns 820. Specifically, the fixed plate 810 is detachably installed on the pressure plate 010, the plurality of fixed columns 820 are fixedly connected between the support plate 100 and the fixed plate 810, and the plurality of fixed columns 820 are dispersedly arranged.
[0054] This form of connecting the support plate 100 and the fixed plate 810 together by using multiple fixing columns 820 not only has reliable connection, but also can realize reliable support of the support plate 100. In addition, by detachably mounting the fixed plate 810 to the pressing plate 010, the modular design of the pressing head assembly 020 is realized, so that the pressing head assembly 020 can be integrally assembled and disassembled.
[0055] Figure 6 For Figure 3 , the C-C cross-sectional view. As Figure 6 shown, the first elastic assembly 500 includes a guide column 510, a guide sleeve 520, a spiral spring 530, a limiting block 540 and a locking screw 550. Specifically, the support plate 100 is provided with a guide hole, the floating plate 300 is provided with a first clearance 340 opposite to the guide hole, one end of the guide column 510 is fixedly connected with the movable plate 200, the guide column 510 passes through the first clearance 340, and the guide column 510 is provided with an annular flange 511. The spiral spring 530 is sleeved on the other end of the guide column 510, one end of the spiral spring 530 abuts against the annular flange 511, the other end of the spiral spring 530 abuts against the limiting block 540, and the limiting block 540 is provided with a fixed hole opposite to the guide column 510. The locking screw 550 is arranged on the side of the limiting block 540 away from the spiral spring 530, wherein the shank section of the locking screw 550 is screwed into the guide column 510 through the fixed hole, and the nut section of the locking screw 550 abuts against the limiting block 540.
[0056] When the pressing head 400 is used to apply pressure to the product, the movable plate 200 is displaced upward under the action of the reaction force, and in this process, the guide column 510 moves upward together with the movable plate 200. Since the annular flange 511 abuts against the lower end of the spiral spring 530, the spiral spring 530 is compressed in the process of upward movement of the guide column 510, so as to realize the buffering during the contact of the pressing head 400 with the product. After the pressure maintaining operation on the product is completed, the guide column 510 is driven to move downward and reset under the elastic restoring force of the spiral spring 530, with the separation of the pressing head 400 from the product.
[0057] This structure form of the first elastic assembly 500 not only can realize the flexible contact of the pressing head 400 with the product in the pressing direction, but also can avoid the damage of the product due to excessive impact force at the moment of contact of the pressing head 400 with the product. In addition, by adjusting the screwing depth of the locking screw 550, the pre-tightening force of the spiral spring 530 can be adjusted, so as to meet the buffering requirements in various working conditions, and the versatility is good.
[0058] Please continue to refer to Figure 2 , Figure 3 and Figure 5In the embodiment, the pressure head assembly 020 can further include a pressure sensor 900, and the pressure sensor 900 is fixedly arranged on one side of the limiting block 540 facing the pressing plate 010.
[0059] During the pressure maintaining process of the product by using the pressure maintaining device, as the pressure applied by the pressure head 400 to the product continuously increases, the movable plate 200 is displaced upward, thereby driving the pressure sensor 900 arranged on the fixed block to move upward, so that the sensing part 910 of the pressure sensor 900 contacts the pressing plate 010.
[0060] Please continue to refer to Figure 1 In the embodiment, the pressure maintaining device can further include a mounting plate 030, a driving cylinder 040 and a plurality of support columns 050, wherein the mounting plate 030 is spaced apart from the pressing plate 010 along the pressing direction, and the mounting plate 030 is located on the side of the pressing plate 010 away from the pressure head assembly 020; the plurality of support columns 050 are fixedly connected to the mounting plate 030, and the pressing plate 010 is in sliding fit with the plurality of support columns 050 along the pressing direction; the cylinder body of the driving cylinder 040 is mounted on the mounting plate 030, and the cylinder rod of the driving cylinder 040 is connected with the pressing plate 010.
[0061] The pressure maintaining device provides support force to the mounting plate 030 by using the plurality of support columns 050, so that the mounting plate 030 remains fixed, thereby ensuring the working stability of the driving cylinder 040; by making the pressing plate 010 in sliding fit with the plurality of support columns 050 along the pressing direction, the support columns 050 can be used for guiding when the driving cylinder 040 drives the pressing plate 010 to move up and down, thereby ensuring the smoothness and stability of the movement of the pressing plate 010.
[0062] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the utility model, can make various changes and modifications, therefore the protection scope of the utility model should be limited to the range defined by the claims.
[0063] Finally, it should be noted that, in this document, relational terms such as first and second, and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," "includes," "including" or any other variation thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
[0064] In the above embodiments, the orientation descriptions such as "upper", "lower", "side" and the like are based on the drawings shown.
[0065] The above description of disclosed embodiments provides enabling disclosure sufficient for one of ordinary skill in the art to practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A pressure maintaining device, characterized by, The application relates to a pressing device, which comprises a pressing plate (010) and a pressing head assembly (020). The pressing head assembly (020) comprises a support plate (100), a movable plate (200), a floating plate (300) and a pressing head (400), the support plate (100) is spaced apart from the pressing plate (010) along a pressing direction and is fixed relative to the pressing plate (010), the movable plate (200) is spaced apart from the support plate (100) along the pressing direction and is connected to the support plate (100) through a first elastic assembly (500), the first elastic assembly (500) is used for enabling the movable plate (200) to always have a tendency to move away from the support plate (100), the floating plate (300) is located between the support plate (100) and the movable plate (200), and the pressing head (400) is fixedly arranged on the floating plate (300), wherein one of the floating plate (300) and the movable plate (200) is provided with a convex spherical surface, the other of the floating plate (300) and the movable plate (200) is provided with a concave spherical surface (220) matched with the convex spherical surface, and the floating plate (300) and the movable plate (200) are connected through a second elastic assembly (600), the second elastic assembly (600) is used for enabling the movable plate (200) and the floating plate (300) to always have a tendency to move close to each other. The second elastic assembly (600) is provided with a plurality of groups, and the plurality of groups of the second elastic assembly (600) are dispersedly arranged, the second elastic assembly (600) comprises a tension spring (610), one end of the tension spring (610) is connected to the movable plate (200), and the other end of the tension spring (610) is connected to the floating plate (300). The movable plate (200) is provided with a first hole (210) penetrating along the pressing direction, the floating plate (300) is provided with a second hole (310) opposite to the first hole (210) along the pressing direction, the second elastic assembly (600) further comprises a fixed pin (620) and a hook (630), the fixed pin (620) penetrates through the first hole (210) and is installed, and one end of the tension spring (610) is hooked to the fixed pin (620), the hook (630) is arranged on the floating plate (300), and the other end of the tension spring (610) is hooked to a hook groove part of the hook (630).
2. The pressure maintaining device according to claim 1, characterized by The second elastic assembly (600) further comprises a sleeve ring (640) and a locking nut (650), the sleeve ring (640) is arranged on a side of the floating plate (300) away from the movable plate (200), a center hole of the sleeve ring (640) is opposite to the second hole (310), the hook (630) further comprises an external thread section, the hook groove part is accommodated in the sleeve ring (640), the external thread section is exposed from the sleeve ring (640), the locking nut (650) is screw-coupled with the external thread section, and an end surface of the locking nut (650) abuts against the sleeve ring (640).
3. The pressure maintaining device according to claim 2, characterized in that 4. The pressure maintaining device according to claim 3, characterized in that 5. The pressure maintaining device according to claim 4, characterized in that The floating plate (300) is provided with a containing groove (320) on the side away from the movable plate (200), and the sleeve ring (640) is inserted into the containing groove (320).
6. The pressure maintenance device of claim 1, wherein The pressure head assembly (020) further comprises a ball (700), the floating plate (300) is provided with a groove (330) on the side facing the movable plate (200), the ball (700) is embedded in the groove (330), and the surface of the ball (700) forms the convex spherical surface; and the concave spherical surface (220) is provided on the side of the movable plate (200) facing the floating plate (300).
7. The pressure maintenance device of claim 1, wherein The pressure head assembly (020) further comprises a fixed plate (810) and a plurality of fixed columns (820), the fixed plate (810) is detachably installed on the pressing plate (010), and the plurality of fixed columns (820) fixedly connect the support plate (100) and the fixed plate (810), and the plurality of fixed columns (820) are dispersedly arranged.
8. The pressure maintaining device according to claim 7, characterized in that The first elastic assembly (500) comprises a guide column (510), a guide sleeve (520), a spiral spring (530), a limiting block (540) and a locking screw (550), wherein the support plate (100) is provided with a guide hole, the floating plate (300) is provided with a first clearance (340) opposite to the guide hole, one end of the guide column (510) is fixedly connected with the movable plate (200), the guide column (510) passes through the first clearance (340), and the guide column (510) is provided with an annular flange (511); the spiral spring (530) is sleeved on the other end of the guide column (510), one end of the spiral spring (530) abuts against the annular flange (511), the other end of the spiral spring (530) abuts against the limiting block (540), and the limiting block (540) is provided with a fixed hole opposite to the guide column (510); the locking screw (550) is arranged on the side of the limiting block (540) away from the spiral spring (530), a screw rod segment of the locking screw (550) is screwed on the guide column (510) through the fixed hole, and a screw cap segment of the locking screw (550) abuts against the limiting block (540).
9. The pressure maintenance device of claim 8, wherein, The pressure head assembly (020) further comprises a pressure sensor (900), the pressure sensor (900) is fixedly arranged on the side of the limiting block (540) facing the pressing plate (010), the fixed plate (810) is provided with a second clearance (811), the pressure sensor (900) is contained in the second clearance (811), and a sensing part (910) of the pressure sensor (900) faces the pressing plate (010).
10. The pressure maintenance device of claim 1, wherein, The pressure maintaining device further comprises a mounting plate (030), a driving cylinder (040) and a plurality of support columns (050), wherein the mounting plate (030) is spaced apart from the pressing plate (010) along the pressing direction, and the mounting plate (030) is located on the side of the pressing plate (010) away from the pressure head assembly (020); the plurality of support columns (050) are fixedly connected to the mounting plate (030), and the pressing plate (010) is in sliding fit with the plurality of support columns (050) along the pressing direction; the cylinder body of the driving cylinder (040) is mounted to the mounting plate (030), and the cylinder rod of the driving cylinder (040) is connected with the pressing plate (010).