Hydraulic pressing device

Abstract

The invention provides a hydraulic pressing device. The hydraulic pressing device comprises a mounting part and a pressing part, a mounting platform for placing a polar plate body is arranged on the mounting part; the pressing part is arranged on one side of the mounting part, and the working end of the pressing part can directly face the mounting platform; a pressing surface is formed on the working end of the pressing part and can be close to the mounting platform, so that the pressing surface can press and cover the polar plate body; the pressing surface can be adjusted according to the shape of a part on the polar plate body, so that the pressing surface can be matched with the shape of the part on the polar plate body. By means of the pressing face arranged at the working end of the pressing part, the pole plate body can be pressed and covered, the pressing face can be correspondingly adjusted according to the shapes of the parts on the pole plate body, the pressing face can be matched with the shapes of the parts on the pole plate body, and therefore the parts with different set angles can be pressed and covered at the same time; and the original mode that the parts are pressed one by one is replaced, and the overall assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil logging instrument assembly, and particularly relates to a hydraulic pressing device. BACKGROUND

[0002] A polar plate body of a logging instrument is provided with gaskets, centralizing pads, buckles, insulating cone sleeves and other components to detect formation resistivity and other information. When assembling, various components need to be pressed and assembled on the polar plate body. However, because the number of components to be pressed is large, and the volume of each component to be pressed is small, manual installation by workers will result in slow assembly speed and large workload. Therefore, a pressing device is needed to perform the pressing process.

[0003] The existing pressing device usually presses each component by hydraulic means. However, because the distribution angles of each component are inconsistent, the pressing work cannot be completed at the same time, and only the components with similar distribution angles or even individual components are pressed one by one, so that the assembly efficiency is still low and the assembly workload is still large.

[0004] Therefore, the existing pressing device cannot press multiple components with different setting angles at the same time. SUMMARY

[0005] To solve the above problems, the application provides a hydraulic pressing device, which comprises:

[0006] A mounting portion, wherein the mounting portion is provided with a mounting platform for placing a polar plate body;

[0007] A pressing portion, wherein the pressing portion is arranged on one side of the mounting portion, and the working end of the pressing portion can face the mounting platform;

[0008] The working end of the pressing portion is formed with a pressing surface, and the pressing surface can be close to the mounting platform, so that the pressing surface can press the polar plate body;

[0009] The pressing surface can be adjusted according to the shape of the components on the polar plate body, so that the pressing surface can adapt to the shape of the components on the polar plate body.

[0010] In some embodiments, the pressing portion comprises:

[0011] A guide assembly, wherein a plurality of guide grooves are arranged in the guide assembly;

[0012] A plurality of pressing rods, wherein the plurality of pressing rods are arranged in one-to-one correspondence with the plurality of guide grooves, and the pressing rods are arranged in the guide grooves;

[0013] The plurality of pressure rods can move axially along the corresponding guide grooves, so that the end of the plurality of pressure rods near the mounting platform can form the pressing surface;

[0014] A drive assembly is provided, which is connected to a plurality of pressure rods respectively, and the drive assembly is capable of driving the plurality of pressure rods to move closer to the mounting platform.

[0015] In some specific embodiments, the plurality of guide grooves are arranged radially to restrict the direction of movement of the plurality of pressure rods.

[0016] In some specific embodiments, the guide assembly is a housing;

[0017] Multiple guide grooves are formed on the side of the housing near the mounting platform;

[0018] The housing has a hydraulic chamber that communicates with the multiple guide grooves.

[0019] In some specific embodiments, a reset groove is provided within the guide groove;

[0020] An elastic element is provided in the reset groove. One end of the elastic element is connected to the pressure rod so that the pressure rod can be driven away from the mounting platform by the rebound of the elastic element.

[0021] In some specific embodiments, the driving component includes:

[0022] A piston assembly, wherein there are multiple piston assemblies, and the multiple piston assemblies are respectively disposed in multiple guide grooves and connected to the corresponding pressure rods;

[0023] A hydraulic device, the output end of which is connected to the hydraulic chamber, so that the hydraulic device can drive the piston to move the pressure rod.

[0024] In some specific embodiments, a limiting ring is fitted on the outer periphery of the end of the pressure rod near the mounting platform;

[0025] The limiting ring can abut against the end of the corresponding guide groove near the mounting platform to limit the movement distance of the pressure rod away from the mounting platform.

[0026] In some specific embodiments, a limiting groove is formed within the guide groove;

[0027] The piston is disposed within the limiting groove, and the piston can abut against the bottom of the limiting groove to limit the movement distance of the pressure rod towards the mounting platform.

[0028] In some specific embodiments, the mounting part includes:

[0029] The base, wherein the clamping part is disposed on one side of the base;

[0030] Mounting plate, which is slidably disposed on the side of the base near the pressing part, and the side of the mounting plate near the pressing part forms the mounting platform;

[0031] The mounting plate can slide along the length of the base.

[0032] In some specific embodiments, the mounting part further includes:

[0033] A transmission assembly is disposed within the base and connected to the mounting plate, so that the mounting plate can be driven to slide along the length of the base.

[0034] The hydraulic pressing device of the present invention, by having a pressing surface located on the working end of the pressing part close to the mounting platform of the mounting part, can press the mounting platform facing the working end of the pressing part, thereby pressing the electrode plate placed on the mounting platform. At the same time, because the pressing surface can be adjusted according to the shape of the parts on the electrode plate, the pressing surface can be adapted to the shape of the parts on the electrode plate, thereby pressing multiple parts with different setting angles at the same time to complete the overall pressing work in one go, replacing the original method of pressing each part one by one, improving the overall assembly efficiency and operational safety, making the pressing time standard uniform, saving a lot of manual pressing time, and improving the stability of pressing depth, reducing the defect rate of finished products.

[0035] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the hydraulic clamping device in an embodiment of the present invention is shown;

[0038] Figure 2A schematic diagram of the clamping part in an embodiment of the present invention is shown;

[0039] Figure 3 It shows Figure 2 An enlarged diagram of A in the diagram;

[0040] Figure 4 A schematic diagram of the hydraulic clamping device after removing the cover is shown in an embodiment of the present invention.

[0041] In the diagram, 100 is the mounting part; 110 is the base; 111 is the guide rail; 112 is the cover; 120 is the mounting plate; 121 is the clamping assembly; 130 is the transmission assembly; 131 is the rotating motor; 1311 is the first fixed seat; 132 is the lead screw; 1321 is the second fixed seat; 140 is the bracket; 200 is the pressing part; 210 is the guide assembly; 211 is the upper shell; 2111 is the limiting groove; 212 is the lower shell; 2121 is the through hole; 2122 is the reset groove; 213 is the shell cover; 2131 is the hydraulic hole; 220 is the pressure rod; 221 is the connecting block; 222 is the elastic element; 223 is the limiting ring; 230 is the drive assembly; 231 is the piston; and 232 is the push rod. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Reference Figure 1 The present invention provides a hydraulic clamping device, comprising: a mounting part 100 and a clamping part 200. The mounting part 100 is provided with a mounting platform for placing an electrode plate; the clamping part 200 is disposed on one side of the mounting part 100, and the working end of the clamping part 200 is positioned directly opposite the mounting platform; a clamping surface is formed on the working end of the clamping part 200, and the clamping surface is close to the mounting platform so that it can press against the electrode plate; the clamping surface can be adjusted according to the shape of the components on the electrode plate so that it can adapt to the shape of the components on the electrode plate.

[0044] Specifically, the working end of the clamping part 200 is positioned directly opposite the mounting platform of the mounting part 100. A clamping surface is formed on the working end of the clamping part 200. The working end of the clamping part 200 can drive the clamping surface to move towards the mounting platform, thereby pressing the electrode plate placed on the mounting platform. The working end of the clamping part 200 can also drive the clamping surface away from the mounting platform, thereby releasing the pressure on the electrode plate placed on the mounting platform. During the movement of the clamping surface towards the mounting platform, the clamping surface preferentially contacts the components on the electrode plate, adjusting accordingly to match the external shape of the components. This facilitates pressing the components, ensuring uniform force distribution during pressing, improving the pressing effect, and guaranteeing a high yield rate. Furthermore, the planar pressing structure of the clamping surface replaces the original point-like pressing structure, allowing multiple components to be pressed simultaneously. When multiple components are pressed simultaneously, the pressing surface will preferentially contact multiple components. This allows the multiple parts of the pressing surface in contact with the components to be adjusted according to the external shape of the corresponding components. This enables the pressing surface to adapt to the external shape of multiple components on the electrode plate, thus ensuring the pressing effect of multiple components and completing the pressing work of multiple components at the same time. This replaces the original method of pressing components one by one, improving the overall assembly efficiency.

[0045] In some specific embodiments of the present invention, reference is made to... Figure 2The pressing part 200 includes a guide assembly 210, a pressure rod 220, and a drive assembly 230. The guide assembly 210 has multiple guide grooves, one end of which extends towards the mounting platform of the mounting part 100. Multiple pressure rods 220 are provided, each corresponding to one of the guide grooves. The pressure rods 220 pass through their respective guide grooves, allowing one end of each pressure rod to face the mounting platform of the mounting part 100. Furthermore, each pressure rod 220 can move axially along its corresponding guide groove, allowing the end of each pressure rod near the mounting platform to move towards the mounting platform. This allows the pressure rods 220 to press against the electrode plate placed on the mounting platform. The multiple pressure rods 220 cooperate with each other, forming a pressing surface at their ends near the mounting platform. Since each pressure rod 220 can move independently along its corresponding guide groove, the pressing surface can be adjusted according to the external shape of the component. As multiple pressure rods 220 move towards the mounting platform, some of the pressure rods 220 positioned directly opposite the highest point of the component will contact the component first, thus pressing down on that highest point. At this point, the other pressure rods 220, before contacting the component, will continue moving towards the mounting platform until they press down on a lower point of the component, completely pressing down on it. This ensures even force distribution during pressing, improves the pressing effect, guarantees a high yield rate, and allows for simultaneous pressing of multiple components, improving overall assembly efficiency. The drive assembly 230 is connected to the end of each pressure rod 220 furthest from the mounting platform, driving the pressure rods 220 towards the mounting platform.

[0046] In some specific embodiments of the present invention, reference is made to... Figure 2 The multiple guide grooves are arranged radially, which can restrict the movement direction of the multiple pressure rods 220. This allows the multiple pressure rods 220, which are respectively inserted into the multiple guide grooves, to also be arranged radially, thereby increasing the pressing angle of the pressure rods 220. This makes it easier to adapt to different setting angles between various parts, facilitates the pressing work, and makes the force on the parts more uniform during pressing.

[0047] In some specific embodiments of the present invention, reference is made to... Figure 2The guide assembly 210 is a housing. Multiple guide grooves are formed on the side of the housing closest to the mounting platform. Furthermore, a hydraulic chamber is provided inside the housing, and each hydraulic chamber is connected to the end of the multiple guide grooves furthest from the mounting platform. By adjusting the hydraulic pressure in the hydraulic chamber, the hydraulic pressure in each guide groove can be indirectly adjusted. Thus, under pressure, the pressure rod 220 in each guide groove can be moved, allowing the pressure rod 220 to move towards the mounting platform to complete the pressing operation of the electrode plate components.

[0048] In some specific embodiments of the present invention, reference is made to... Figure 3 A reset groove 2122 is provided in the guide groove; an elastic element 222 is provided in the reset groove 2122. One end of the elastic element 222 is connected to the pressure rod 220, and the other end of the elastic element 222 is connected to the bottom of the reset groove 2122. When the pressure rod 220 moves towards the mounting platform, it will compress the elastic element 222. After the pressing of the parts is completed, the elastic element 222 can rebound, thereby driving the pressure rod 220 to move away from the mounting platform to reset, which makes it easy to retract the pressure rod 220.

[0049] Furthermore, the elastic element 222 can be a spring, which is sleeved on the outer periphery of the pressure rod 220, thereby facilitating installation.

[0050] Furthermore, a connecting block 221 is provided at the end of the pressure rod 220 away from the mounting platform. The width of the connecting block 221 is greater than the outer diameter of the pressure rod 220, and the connecting block 221 is positioned directly opposite the bottom of the reset groove 2122. One end of the elastic element 222 is connected to the bottom of the reset groove 2122, and the other end of the elastic element 222 is connected to the side of the connecting block 221 near the bottom of the reset groove 2122. When the pressure rod 220 moves towards the mounting platform, the elastic element 222 is compressed due to the restraining effect of the connecting block 221 and the bottom of the reset groove 2122. After the pressing of the component is completed, the elastic element 222 can rebound, thereby pushing the connecting block 221 and causing the pressure rod 220 to move away from the mounting platform.

[0051] In some specific embodiments of the present invention, reference is made to... Figure 3 The drive assembly 230 includes a piston 231 and a hydraulic device. Multiple pistons 231 are disposed in multiple guide grooves and connected to the end of the corresponding pressure rod 220 furthest from the mounting platform. The output end of the hydraulic device is connected to a hydraulic chamber, and the pressure within the hydraulic chamber can be adjusted via the hydraulic device, thereby driving the pistons 231 disposed in the guide grooves to move the pressure rod 220.

[0052] Furthermore, sealing rings are respectively provided between the two ends of the piston component 231 and the groove wall of the guide groove, thereby improving the sealing performance between the guide groove and the piston component 231, avoiding pressure leakage, and ensuring that the piston component 231 has the ability to push the pressure rod 220 to move smoothly.

[0053] Furthermore, the end of the piston 231 near the pressure rod 220 is connected to the side of the connecting block 221 away from the pressure rod 220 via the push rod 232, which facilitates connection with the pressure rod 220 and enables the pressure rod 220 to move.

[0054] In some specific embodiments of the present invention, reference is made to... Figure 3 A limiting ring 223 is sleeved around the outer periphery of the end of the pressure rod 220 near the mounting platform, axially around the pressure rod 220. The outer diameter of the limiting ring 223 is larger than the diameter of the guide groove. When the pressure rod 220 moves away from the mounting platform under the rebound action of the elastic element 222, the side of the limiting ring 223 near the guide groove can abut against the outer wall of the end of the guide groove near the mounting platform. Thus, the limiting ring 223 can limit the movement distance of the pressure rod 220 when it moves away from the mounting platform, and prevent the pressure rod 220 from pushing the piston element 231 out of the guide groove, thereby ensuring the stability of the movement of the pressure rod 220.

[0055] In some specific embodiments of the present invention, reference is made to... Figure 3 A limiting groove 2111 is provided in the guide groove; the piston 231 is set in the limiting groove 2111. When the piston 231 pushes the pressure rod 220 to move closer to the mounting platform, the piston 231 can abut against the bottom of the limiting groove 2111. Thus, the limiting groove 2111 can limit the movement distance of the pressure rod 220 when it moves closer to the mounting platform, thereby avoiding damage to the components on the electrode plate due to excessive pressure adjusted by the hydraulic device.

[0056] Furthermore, referring to Figure 3The housing includes an upper shell 211 and a lower shell 212. The upper shell 211 and lower shell 212 are positioned vertically, with the lower shell 212 positioned above the mounting platform. Multiple through holes 2121 are formed on the lower shell 212, and pressure rods 220 pass through these through holes 2121. The upper shell 211 is positioned above the lower shell 212, and multiple limiting grooves 2111 are formed on the side of the upper shell 211 near the lower shell 212. Each limiting groove 2111 corresponds to one of the multiple through holes 2121, forming a guide groove through which the limiting groove 2111 communicates with the corresponding through hole 2121. The diameter of the limiting groove 2111 is larger than the diameter of the through hole 2121, thus forming the bottom of the limiting groove 2111 on the outer wall of the end of the through hole 2121 near the upper shell 211. The piston 231 is disposed within the limiting groove 2111 of the upper shell 211. When the piston 231 pushes the pressure rod 220 to move closer to the mounting platform, the piston 231 can abut against the outer wall of the end of the through hole 2121 near the upper shell 211, thereby limiting the movement distance of the pressure rod 220 when it moves closer to the mounting platform. The hydraulic chamber is located on the side of the upper shell 211 away from the lower shell 212, and a hydraulic hole 2131 is provided on the upper shell 211, through which the output end of the hydraulic device can communicate with the hydraulic chamber.

[0057] Furthermore, the reset groove 2122 is formed axially along the through hole 2121 on the inner wall of the through hole 2121. The connecting block 221 is slidably disposed within the reset groove 2122. The elastic element 222 is disposed between the bottom of the reset groove 2122 near the mounting platform and the connecting block 221, thereby facilitating the placement of the elastic element 222. Moreover, the connecting block 221, the through hole 2121, and the reset groove 2122 are coaxially arranged, thereby ensuring the stability of the pressure rod 220 during movement and preventing the pressure rod 220 from wobbling.

[0058] Furthermore, the housing also includes a cover 213. The cover 213 is positioned above the upper housing 211, so that the upper housing 211 and the cover 213 together form a hydraulic cavity, resulting in a simple, flexible, and easy-to-install structure. A hydraulic hole 2131 is provided on the cover 213 for easy machining. Moreover, the upper housing 211, lower housing 212, and housing are detachably connected by bolts, facilitating installation and disassembly.

[0059] Furthermore, the lower shell 212 is embedded in the bottom surface of the upper shell 211, which makes the structure stable and easy to install and disassemble.

[0060] In some specific embodiments of the present invention, reference is made to... Figure 4The mounting part 100 includes a base 110 and a mounting plate 120. A clamping part 200 is disposed on one side of the base 110; the mounting plate 120 is slidably disposed on the side of the base 110 near the clamping part 200, and the side of the mounting plate 120 near the clamping part 200 forms a mounting platform; the mounting plate 120 can slide along the length of the base 110.

[0061] Specifically, a bracket 140 is mounted above the base 110, and a clamping part 200 is disposed on the bracket 140. The working end of the clamping part 200 passes through the bracket 140, ensuring that the clamping surface of the working end of the clamping part 200 is directly opposite the base 110. A mounting plate 120 is slidably disposed on the top of the base 110, forming a mounting platform on the top surface of the mounting plate 120 near the clamping part 200. The mounting plate 120 can slide along the length of the base 110, facilitating the placement of the electrode plate. When the electrode plate needs to be placed, the mounting plate 120 is slid out from under the bracket 140. After the electrode plate is placed, the mounting plate 120 is slid back under the bracket 140.

[0062] Furthermore, the bottom sides of the base 110 are provided with guide rails 111, and the two ends of the guide rails 111 extend along the length of the base 110. The mounting plate 120 is slidably mounted on the guide rails 111 by a slider, so that the mounting plate 120 can slide on the base 110 along the length of the base 110.

[0063] Furthermore, there are multiple pressing parts 200, which are arranged sequentially on the bracket 140, thereby expanding the pressing area of ​​the pressing surface and facilitating the simultaneous pressing of more parts.

[0064] Furthermore, a clamping assembly 121 is provided on the top surface of the mounting plate 120. The clamping assembly 121 can clamp the electrode plate body, thereby ensuring stability during pressing and ensuring the pressing effect.

[0065] In some specific embodiments of the present invention, reference is made to... Figure 4 The mounting section 100 also includes a transmission assembly 130. The transmission assembly 130 is disposed within the base 110 and is connected to the mounting plate 120. The transmission assembly 130 can drive the mounting plate 120 to slide along the length of the base 110, making the movement of the mounting plate 120 more precise and improving the pressing effect.

[0066] Further, the transmission assembly 130 includes a rotary motor 131 and a lead screw 132. The rotary motor 131 is fixedly mounted at one end of its length within the base 110 via a first fixed seat 1311, and a second fixed seat 1321 is mounted at the other end of its length within the base 110. The first fixed seat 1311, the second fixed seat 1321, and the rotating end of the rotary motor 131 are coaxially arranged. The lead screw 132 is positioned along the length of the base 110 between the second fixed seat 1321 and the rotating end of the rotary motor 131. One end of the lead screw 132 is rotatably connected to the middle of the second fixed seat 1321, and the other end is connected to the rotating end of the rotary motor 131 via a coupling. Under the action of the rotary motor 131, the lead screw 132 can be driven to rotate. The lead screw 132 is connected to the bottom of the mounting plate 120 through a threaded seat. The threaded seat is threaded onto the lead screw 132, and the top of the threaded seat is fixedly connected to the bottom surface of the mounting plate 120. When the lead screw 132 rotates, it can drive the threaded seat to move the mounting plate 120 along the length of the base 110, thereby facilitating the placement of the electrode plate on the mounting platform.

[0067] Furthermore, the top of the base 110 is covered with a cover 112, which can prevent dust when pressing is not required, thus preventing foreign objects from falling into the base 110 and ensuring the stable use of the guide rail 111 and the lead screw.

[0068] Although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Hydraulic hold-down device, characterized in that The utility model relates to a kind of polar plate body pressing device, including: Mounting portion (100), the mounting platform for placing polar plate body is provided on the mounting portion (100); Compression portion (200), the compression portion (200) is arranged on the side of the mounting portion (100), and the working end of the compression portion (200) can be arranged opposite the mounting platform; The working end of the compression portion (200) is formed with compression surface, the compression surface can be close to the mounting platform, so that the compression surface can be pressed on the polar plate body; The compression surface can be adjusted according to the shape of the parts on the polar plate body, so that the compression surface can adapt to the shape of the parts on the polar plate body.

2. Hydraulic hold-down device according to claim 1, characterized in that The compression portion (200) includes: Guide assembly (210), a plurality of guide grooves are provided in the guide assembly (210); Compression rod (220), the compression rod (220) is multiple, multiple compression rod (220) is arranged corresponding to multiple guide grooves, and the compression rod (220) is arranged in the guide groove; Multiple compression rod (220) can be moved along the axis of the corresponding guide groove respectively, so that the end of multiple compression rod (220) close to the mounting platform can form the compression surface; Drive assembly (230), the drive assembly (230) is connected with multiple compression rod (220) respectively, and the drive assembly (230) can drive multiple compression rod (220) to move close to the mounting platform.

3. Hydraulic hold-down device according to claim 2, characterized in that Multiple guide grooves are arranged radially to limit the movement direction of multiple compression rod (220).

4. Hydraulic pressing device according to claim 2 or 3, characterized in that The guide assembly (210) is a housing; Multiple guide grooves are arranged on the side of the housing close to the mounting platform; Hydraulic chamber is arranged in the housing and communicated with multiple guide grooves.

5. Hydraulic hold-down device according to claim 2, characterized in that Reset slot (2122) is arranged in the guide groove; Elastic member (222) is arranged in the reset slot (2122), one end of the elastic member (222) is connected with the compression rod (220), so that the compression rod (220) can be driven away from the mounting platform by the resilience of the elastic member (222).

6. The hydraulic hold down device of claim 2, wherein, The drive assembly (230) includes: Piston (231), multiple pistons (231) are arranged in multiple guide grooves and connected with corresponding compression rod (220) respectively; Hydraulic device, the output end of the hydraulic device is communicated with the hydraulic chamber, so that the hydraulic device can drive the piston (231) to move the compression rod (220).

7. Hydraulic hold-down device according to claim 6, characterized in that Limiting ring (223) is arranged on the outer periphery of the end of the compression rod (220) close to the mounting platform; The limiting ring (223) can abut against the end of the corresponding guide groove close to the mounting platform to limit the movement distance of the compression rod (220) away from the mounting platform.

8. Hydraulic hold-down device according to claim 6, characterized in that Limiting slot (2111) is arranged in the guide groove; The piston (231) is arranged in the limiting slot (2111), and the piston (231) can abut against the groove bottom of the limiting slot (2111) to limit the movement distance of the compression rod (220) close to the mounting platform.

9. The hydraulic hold down apparatus of claim 1 wherein, The mounting part (100) comprises: a base (110), wherein the pressing part (200) is arranged on one side of the base (110); a mounting plate (120) slidingly arranged on one side of the base (110) close to the pressing part (200), wherein one side of the mounting plate (120) close to the pressing part (200) forms the mounting platform; The mounting plate (120) can slide along the length direction of the base (110).

10. Hydraulic hold-down device according to claim 9, characterized in that The mounting part (100) further comprises: a transmission assembly (130) arranged in the base (110), and the transmission assembly (130) is connected with the mounting plate (120), so that the mounting plate (120) can be driven to slide along the length direction of the base (110) through the transmission assembly (130).

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