Four-column hydraulic press with conveniently replaceable columns

Abstract

The application discloses a four-column hydraulic machine with conveniently replaceable columns, and belongs to the technical field of four-column hydraulic machines. The four-column hydraulic machine with conveniently replaceable columns comprises a supporting base, the top of the supporting base is fixedly connected with a supporting workbench mechanism, a plurality of corner portions of the supporting workbench mechanism are provided with column mechanisms, a top supporting plate is arranged between the outer wall top portions of the plurality of column mechanisms, the corner portions of the top supporting plate are provided with self-locking clamping mechanisms, the center of the top supporting plate is provided with a hydraulic mechanism, the output end of the hydraulic mechanism is fixedly connected with a hydraulic plate, and the corner portions of the top of the hydraulic plate are fixedly connected with limiting clamping mechanisms. The self-locking clamping mechanism is designed to automatically clamp and automatically release the top of the column mechanism and the top supporting plate, the convenience of replacement and installation is improved, and the operation difficulty is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of four-column hydraulic presses, specifically relating to a four-column hydraulic press that facilitates column replacement. Background Technology

[0002] A four-column hydraulic press is a mechanical device that uses hydraulic oil as its working medium. An oil pump converts mechanical energy into hydraulic energy, driving the piston in the cylinder to perform linear reciprocating motion guided by four columns. It typically consists of a machine body, hydraulic system, electrical control system, working cylinders, and a slide block. The machine body is composed of an upper crossbeam, a lower crossbeam, and four columns, forming a closed frame structure that bears the entire load during operation. The main cylinder is mounted on the upper crossbeam, and the lower crossbeam rests on the worktable. The columns connect and guide the upper and lower crossbeams. The four columns provide support and guidance for the entire hydraulic press. The columns need to be replaced when severe wear, deformation, cracks, corrosion, or material aging occurs.

[0003] When replacing the uprights of existing four-column hydraulic presses, it is often necessary to disassemble the entire hydraulic press components. This usually involves the disassembly and assembly of multiple parts. In addition, the four-column hydraulic press is heavy and often requires the use of auxiliary machinery. Furthermore, due to the height of the four-column hydraulic press, manual climbing is often required for disassembly. This results in a long time required to replace the uprights and increases the risk of operation. The overall disassembly and assembly often consumes a lot of manpower. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a four-column hydraulic press that facilitates column replacement.

[0005] The technical solution adopted to solve the above technical problems is: to provide a four-column hydraulic press that facilitates column replacement, including a support base, a support worktable mechanism fixedly connected to the top of the support base, and column mechanisms provided at multiple corners of the support worktable mechanism;

[0006] A top support plate is installed between the top of the outer walls of the multiple column mechanisms. A self-locking engagement mechanism is provided at the corners of the top support plate, and a hydraulic mechanism is installed at the center of the top support plate.

[0007] The output end of the hydraulic mechanism is fixedly connected to a hydraulic plate, and a limit locking mechanism is fixedly connected to each corner of the top of the hydraulic plate. Two auxiliary support components are installed between the support workbench mechanism and the top support plate.

[0008] Furthermore, the supporting workbench mechanism includes a supporting platform body fixedly connected to the top of the supporting base. Each corner of the supporting platform body is engaged with a corner engaging fastener. Both sides of the multiple corner engaging fasteners are fixedly connected with limiting fasteners. Two first bolts are installed between the multiple limiting fasteners and the supporting platform body.

[0009] The above technical solution enables the corner locking fastener to provide locking support for the column mechanism, and multiple first bolts and two limiting fixing ears enable the corner locking fastener and the support platform body to lock and fix together.

[0010] Furthermore, the column mechanism includes a column body, an integrated locking sleeve is provided at the bottom of the outer wall of the column body, a locking base plate is fixedly connected to the bottom of the column body, a plurality of second bolts are installed on the locking base plate, and a top self-locking groove and a limiting locking groove are respectively opened at the top of the outer wall of the column body.

[0011] Through the above technical solution, the integrated locking sleeve can be used with the support workbench mechanism for fixation, and the locking base plate and multiple second bolts can achieve further fixation. The top self-locking groove and self-locking locking mechanism can complete the fixation and subsequent automatic locking and unlocking of disassembly. Through the locking of the limit locking groove and the limit locking mechanism, the hydraulic mechanism can be used to assist in the pulling out and insertion of the column mechanism, further saving manpower.

[0012] Furthermore, the column body, the integrated snap-fit ​​sleeve, and the locking base plate are an integral structure. Each corner of the support platform body and multiple corner snap-fit ​​fasteners are respectively provided with grooves corresponding to the column body and the integrated snap-fit ​​sleeve. Each corner of the bottom of the support platform body and the bottom of multiple corner snap-fit ​​fasteners are respectively provided with two threaded holes corresponding to the second bolt. Multiple sides of the support platform body are respectively provided with grooves and threaded holes corresponding to the limiting fixing ears and the first bolt.

[0013] The above technical solution achieves the integrated locking and fixing of the bottom of the column mechanism through the grooves on the corners of the support platform and the grooves of the corner locking fastener, without affecting the installation of new column mechanisms from the bottom. The support platform, locking base plate and corner locking fastener are further fixed by multiple second bolts.

[0014] Furthermore, the self-locking engagement mechanism includes a U-shaped fixing plate fixedly connected to the top of the top support plate and multiple locking triangular blocks slidably connected to the corners of the top support plate. An electric rod is installed on the top of the U-shaped fixing plate, and a connecting plate is fixedly connected to the output end of the electric rod. Bolt plate assemblies are fixedly connected to both sides of the bottom of the connecting plate. Two irregularly shaped drive plates are fixedly connected to the bottom of the two bolt plate assemblies. An integrated limiting slider is fixedly connected to the top and bottom of the locking triangular blocks.

[0015] With the above technical solution, when disassembling the column mechanism, the connecting plate is pulled by an electric rod, causing the two bolt plate assemblies to drive multiple irregularly shaped drive plates upward. Due to the irregular structure of the drive plates, during the upward movement, the bottom inclined surface engages with the through hole on the locking triangular block, pushing the locking triangular block to move. A one-piece limiting slider and corresponding groove achieve limiting sliding, at which point the two locking triangular blocks at this position move away from each other, thus releasing the locking of the two locking triangular blocks onto the top self-locking groove. When installing a new column mechanism, the electric rod pushes the multiple irregularly shaped drive plates downward. The inclined surface on one side of the top of the drive plate engages with the through hole of the locking triangular block, causing the two locking triangular blocks to move closer together, thus completing the locking and fixing of the top self-locking groove. This achieves automatic locking and automatic release, improving the convenience of replacement and installation and reducing operational difficulty.

[0016] Furthermore, each corner of the top support plate is provided with a groove corresponding to the locking triangle block and the integrated limiting slider, and each corner of the top support plate and the locking triangle block are provided with a through hole corresponding to the irregular drive plate.

[0017] The above technical solution achieves the limiting sliding of the locking triangle block through the integrated limiting slider and groove, and the upward and downward movement of the irregular-shaped drive plate through the corresponding through hole can drive the locking triangle block to move repeatedly in the lateral direction.

[0018] Furthermore, the hydraulic mechanism includes a hydraulic press housing fixedly connected to the center of the top support plate, a hydraulic rod assembly slidably connected to the inner wall of the hydraulic press housing, and pipe connection assemblies fixedly connected to the top side and the bottom side of the outer wall of the hydraulic press housing.

[0019] The above technical solution connects two pipe connection components to the oil pipe, and controls the oil pump through the control component to achieve drive. During normal operation, the hydraulic plate is pushed by pushing the hydraulic rod assembly to complete the pressure work.

[0020] Furthermore, the limiting engagement mechanism includes a fixed housing fixedly connected to the top corner of the hydraulic plate. The inner wall of the fixed housing is slidably connected to two sliding plates. Both sides of the two sliding plates are fixedly connected to insertion ears, and a pin is provided between the two insertion ears corresponding to the two sliding plates.

[0021] The above technical solution pushes two sliding plates closer to each other inside the fixed housing until the arc surfaces of the two sliding plates are locked in the limiting engagement groove, and the insertion ears on both sides are fixed by pins. At this time, the hydraulic plate and the column mechanism can be fixed by the limiting engagement mechanism. When the hydraulic plate moves, it will drive the column mechanism to move, which facilitates the replacement of the column mechanism.

[0022] Furthermore, the auxiliary support assembly includes an L-shaped fixing plate, a first reinforcing support frame is fixedly connected to the top side of the L-shaped fixing plate, a threaded rod is rotatably connected inside the L-shaped fixing plate, a movable support plate is slidably connected to the inner wall of the L-shaped fixing plate, a sliding limit plate is fixedly connected to one side of the movable support plate, and a second reinforcing support frame is fixedly connected to the top of the movable support plate.

[0023] With the above technical solution, when replacing the column mechanism, auxiliary support components are placed on both sides, and the movable support plate and the sliding limit plate are driven to slide inside the L-shaped fixed plate by rotating the threaded rod until the movable support plate contacts the top of the support workbench mechanism, thereby completing the support work for the support workbench mechanism and the top support plate, avoiding the problem of no support between the support workbench mechanism and the top support plate when disassembling the column mechanism at this position.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention designs a self-locking engagement mechanism. By pulling the connecting plate with an electric rod, the two bolt plate assemblies drive multiple irregularly shaped drive plates to rise. Through the irregular structure of the irregularly shaped drive plates, when rising, the inclined surface at the bottom cooperates with the through hole on the locking triangle block to push the locking triangle block to move. At this time, the two locking triangle blocks at this position move away from each other, thereby releasing the two locking triangle blocks from locking the top self-locking groove. When the electric rod pushes multiple irregularly shaped drive plates to descend, the inclined surface on one side of the top of the irregularly shaped drive plate cooperates with the locking... The through hole of the tight triangular block enables the two locking triangular blocks to approach each other, thereby completing the locking and fixing of the top self-locking groove, achieving the purpose of automatic locking and automatic release, improving the convenience of replacement and installation, and reducing the difficulty of operation; (2) By designing a limiting locking mechanism, when the arc surface of the two sliding plates is locked inside the limiting locking groove, the insertion ears on both sides are fixed by the pin. At this time, the hydraulic plate and the column mechanism can be fixed by the limiting locking mechanism. When the hydraulic plate moves, it will drive the column mechanism to move, making it convenient to replace the column mechanism. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of the hydraulic mechanism of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the column mechanism of the present invention;

[0028] Figure 4 This is a three-dimensional structural diagram of the column mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the supporting workbench mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the corner locking fastener structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the self-locking engagement mechanism of the present invention;

[0032] Figure 8 This is an exploded view of the self-locking engagement mechanism of the present invention;

[0033] Figure 9 This is a schematic diagram of the top support plate structure of the present invention;

[0034] Figure 10 This is a cross-sectional structural diagram of the self-locking engagement mechanism, column mechanism, and top support plate of the present invention;

[0035] Figure 11 This is a schematic diagram of the column mechanism and the limiting engagement mechanism of the present invention;

[0036] Figure 12 This is an exploded view of the limiting and engaging mechanism structure of the present invention;

[0037] Figure 13 This is a schematic diagram of the auxiliary support component structure of the present invention;

[0038] Figure 14 This is a schematic diagram of the cross-sectional structure of the auxiliary support component of the present invention;

[0039] Figure 15 This is a schematic diagram of the sliding limit plate structure of the present invention.

[0040] Reference numerals: 1. Support base; 2. Support workbench mechanism; 201. Support platform body; 202. Corner locking fastener; 203. Limiting fixing ear; 204. First bolt; 3. Column mechanism; 301. Column body; 302. Integrated locking sleeve; 303. Locking base plate; 304. Second bolt; 305. Top self-locking groove; 306. Limiting locking groove; 4. Top support plate; 5. Self-locking locking mechanism; 501. U-shaped fixing plate; 502. Electric rod; 503. Connecting plate; 504. Bolt plate assembly; 505. 506. Irregularly shaped drive plate; 507. Locking triangular block; 508. Integrated limit slider; 6. Hydraulic mechanism; 601. Hydraulic press housing; 602. Hydraulic rod assembly; 603. Pipe connection assembly; 7. Hydraulic plate; 8. Limit locking mechanism; 801. Fixed housing; 802. Sliding plate; 803. Insertion ear; 804. Pin; 9. Auxiliary support assembly; 901. L-shaped fixed plate; 902. First reinforcing support frame; 903. Threaded rod; 904. Movable support plate; 905. Sliding limit plate; 906. Second reinforcing support frame. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] like Figures 1-6 As shown in the figure, a four-column hydraulic press with convenient column replacement in this embodiment includes a support base 1. A support worktable mechanism 2 is fixedly connected to the top of the support base 1. The support worktable mechanism 2 includes a support table body 201 fixedly connected to the top of the support base 1. Each corner of the support table body 201 is engaged with a corner engaging fastener 202. Limiting fasteners 203 are fixedly connected to both sides of the multiple corner engaging fasteners 202. Two first bolts 204 are installed between the multiple limiting fasteners 203 and the support table body 201. The corner engaging fasteners 202 can achieve engagement support for the column mechanism 3. The multiple first bolts 204 and the two limiting fasteners 203 can achieve engagement and fixation between the corner engaging fasteners 202 and the support table body 201.

[0043] like Figures 1-6As shown, the support workbench mechanism 2 is equipped with column mechanisms 3 at multiple corners. Each column mechanism 3 includes a column body 301. An integrated locking sleeve 302 is provided at the bottom of the outer wall of the column body 301. A locking base plate 303 is fixedly connected to the bottom of the column body 301, and multiple second bolts 304 are installed on the locking base plate 303. A top self-locking groove 305 and a limiting locking groove 306 are respectively opened at the top of the outer wall of the column body 301. The integrated locking sleeve 302 can be used to fix the support workbench mechanism 2. Further fixation is achieved through the locking base plate 303 and the multiple second bolts 304. The top self-locking groove 305 and the self-locking locking mechanism 5 enable automatic locking and unlocking for subsequent disassembly. The locking groove 306 and the limiting locking mechanism 8 allow the column mechanism 3 to be pulled out and inserted with the assistance of the hydraulic mechanism 6, further saving manpower. The support body 301, the integrated locking sleeve 302, and the locking base plate 303 are an integrated structure. Each corner of the support body 201 and the multiple corner locking fasteners 202 are respectively provided with grooves corresponding to the column body 301 and the integrated locking sleeve 302. Each corner of the bottom of the support body 201 and the bottom of the multiple corner locking fasteners 202 are respectively provided with two threaded holes corresponding to the second bolts 304. Multiple sides of the support body 201 are respectively provided with grooves and threaded holes corresponding to the limiting fixing ears 203 and the first bolts 204. The integrated locking sleeve 302 at the bottom of the column mechanism 3 is locked and fixed by the grooves at the corners of the support body 201 and the grooves at the corner locking fasteners 202, without affecting the installation of new column mechanisms 3 from the bottom. The support body 201, the locking base plate 303, and the corner locking fasteners 202 are further fixed by the multiple second bolts 304.

[0044] like Figures 1-10As shown, a top support plate 4 is installed between the top of the outer walls of multiple column mechanisms 3. Each corner of the top support plate 4 is equipped with a self-locking engagement mechanism 5. The self-locking engagement mechanism 5 includes a U-shaped fixing plate 501 fixedly connected to the top of the top support plate 4 and multiple locking triangular blocks 506 slidably connected to the corners of the top support plate 4. An electric rod 502 is installed on the top of the U-shaped fixing plate 501. A connecting plate 503 is fixedly connected to the output end of the electric rod 502. Bolt plate assemblies 504 are fixedly connected to both sides of the bottom of the connecting plate 503. Two irregularly shaped drive plates 505 are fixedly connected to the bottom of each bolt plate assembly 504. The top and bottom of the locking triangular blocks 506 are fixedly connected to… With an integrated limiting slider 507, when disassembling the column mechanism 3, the electric rod 502 pulls the connecting plate 503, causing the two bolt plate assemblies 504 to drive multiple irregularly shaped drive plates 505 to rise. Due to the irregular structure of the irregularly shaped drive plates 505, during the rise, the inclined surface at the bottom engages with the through hole on the locking triangle block 506, pushing the locking triangle block 506 to move. The integrated limiting slider 507 and the corresponding groove achieve limiting sliding. At this point, the two locking triangle blocks 506 at this position move away from each other, thereby releasing the locking of the two locking triangle blocks 506 onto the top self-locking groove 305. When installing the new column mechanism 3, the electric rod 502 pushes the multiple irregularly shaped drive plates 505... As the drive plate 505 descends, the inclined surface on one side of the top of the irregular drive plate 505 engages with the through hole of the locking triangular block 506, bringing the two locking triangular blocks 506 closer together. This allows them to engage and lock the top self-locking groove 305, achieving automatic engagement and disengagement, improving the convenience of replacement and installation, and reducing operational difficulty. Each corner of the top support plate 4 has a groove corresponding to the locking triangular block 506 and the integrated limiting slider 507, and each corner of the top support plate 4 and the locking triangular block 506 have through holes corresponding to the irregular drive plate 505. The integrated limiting slider 507 and the grooves effectively limit the locking triangular block 506. The sliding mechanism, through the corresponding through holes, enables the irregularly shaped drive plate 505 to move up and down, which can drive the locking triangular block 506 to move repeatedly in the lateral direction. A hydraulic mechanism 6 is installed at the center of the top support plate 4. The hydraulic mechanism 6 includes a hydraulic press housing 601 fixedly connected to the center of the top support plate 4. A hydraulic rod assembly 602 is slidably connected to the inner wall of the hydraulic press housing 601. Pipe connection assemblies 603 are fixedly connected to the top side and the bottom side of the outer wall of the hydraulic press housing 601. The two pipe connection assemblies 603 are connected to oil pipes, and the oil pump is controlled by the control assembly to achieve drive. During normal operation, the hydraulic plate 7 is pushed by pushing the hydraulic rod assembly 602 to complete the pressure work.

[0045] like Figures 1-12As shown, the output end of the hydraulic mechanism 6 is fixedly connected to a hydraulic plate 7. Each corner of the top of the hydraulic plate 7 is fixedly connected to a limiting engagement mechanism 8. The limiting engagement mechanism 8 includes a fixed housing 801 fixedly connected to the top corner of the hydraulic plate 7. Two sliding plates 802 are slidably connected to the inner wall of the fixed housing 801. Insertion ears 803 are fixedly connected to both sides of the two sliding plates 802. Pins 804 are provided between the two insertion ears 803 corresponding to the two sliding plates 802. The two sliding plates 802 are pushed to slide closer to each other inside the fixed housing 801 until the arc surfaces of the two sliding plates 802 are locked inside the limiting engagement groove 306, and the insertion ears 803 on both sides are fixed by the pins 804. At this time, the hydraulic plate 7 and the column mechanism 3 can be fixed by the limiting engagement mechanism 8. When the hydraulic plate 7 moves, it will drive the column mechanism 3 to move, which facilitates the replacement of the column mechanism 3.

[0046] like Figures 1-15 As shown, two auxiliary support components 9 are installed between the supporting workbench mechanism 2 and the top support plate 4. The auxiliary support components 9 include an L-shaped fixed plate 901, a first reinforcing support frame 902 fixedly connected to the top side of the L-shaped fixed plate 901, a threaded rod 903 rotatably connected inside the L-shaped fixed plate 901, a movable support plate 904 slidably connected to the inner wall of the L-shaped fixed plate 901, a sliding limit plate 905 fixedly connected to one side of the movable support plate 904, and a second reinforcing support frame 906 fixedly connected to the top of the movable support plate 904. When replacing the column mechanism 3, the auxiliary support components 9 are placed on both sides, and the movable support plate 904 and the sliding limit plate 905 are driven to slide inside the L-shaped fixed plate 901 by rotating the threaded rod 903 until the movable support plate 904 contacts the top of the supporting workbench mechanism 2, thereby completing the support work for the supporting workbench mechanism 2 and the top support plate 4, avoiding the problem of no support between the supporting workbench mechanism 2 and the top support plate 4 when disassembling the column mechanism 3 at this position.

[0047] The working principle of this embodiment is as follows: two pipe connection components 603 are connected to oil pipes, and the oil pump is driven by the control component. During normal operation, the hydraulic plate 7 is pushed by the hydraulic rod assembly 602 to complete the pressure work. When replacing the column, the four columns are replaced one by one. Select the column mechanism 3 in one corner, place the auxiliary support components 9 on both sides of it, and drive the movable support plate 904 and the sliding limit plate 905 to slide inside the L-shaped fixed plate 901 by rotating the threaded rod 903 until the movable support plate 904 contacts the top of the support workbench mechanism 2, thereby completing the support work of the support workbench mechanism 2 and the top support plate 4.

[0048] Then, the self-locking engagement mechanism 5 at this position is driven, and the connecting plate 503 is pulled by the electric rod 502, so that the two bolt plate assemblies 504 drive multiple irregular drive plates 505 to rise. Through the irregular structure of the irregular drive plate 505, when rising, it will move the locking triangle block 506 by cooperating with the through hole on the bottom inclined surface. And the integrated limit slider 507 and the corresponding groove realize the limit sliding. At this time, the two locking triangle blocks 506 at this position move away from each other, thereby releasing the two locking triangle blocks 506 from locking the top self-locking groove 305. Then, the two sliding plates 802 are pushed to slide closer to each other inside the fixed housing 801 until the arc surface of the two sliding plates 802 is locked inside the limit engagement groove 306, and the insertion ears 803 on both sides are fixed by the pins 804.

[0049] Finally, remove the multiple first bolts 204 and multiple second bolts 304 at the bottom, remove the corner locking fastener 202 as a whole, and then push the hydraulic plate 7 to move through the hydraulic mechanism 6. Since the limit locking mechanism 8 is used to lock with the disassembled column mechanism 3, the hydraulic plate 7 will also drive the corresponding disassembled column mechanism 3 to move downwards when it moves, until the column mechanism 3 is pulled out from the top support plate 4. At this time, the two pins 804 can be removed and the two sliding plates 802 can be pulled open. The entire column mechanism 3 can be pulled out from the hydraulic plate 7 to achieve the disassembly of the column mechanism 3.

[0050] Take out the new column mechanism 3 and insert it into the hole of the hydraulic plate 7 from the bottom. Then, similarly, the two sliding plates 802 engage the limiting engagement groove 306 of the new column mechanism 3. Under the reset of the hydraulic mechanism 6, the new column mechanism 3 will move upward until it is inserted into the top support plate 4. At this time, the electric rod 502 at this position pushes multiple irregular drive plates 505 to descend. The inclined surface on one side of the top of the irregular drive plate 505 cooperates with the through hole of the locking triangular block 506 to bring the two locking triangular blocks 506 closer to each other, thereby completing the engagement and fixation of the top self-locking groove 305. At this time, the limiting engagement mechanism 8 is released, and the corner engagement fixing piece 202, multiple first bolts 204 and multiple second bolts 304 are installed at the bottom to complete the fixation. The other column mechanisms 3 are replaced in the same way.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A four-column hydraulic press with convenient column replacement, comprising a support base (1), characterized in that: The top of the support base (1) is fixedly connected to a support workbench mechanism (2). The support workbench mechanism (2) includes a support platform body (201) fixedly connected to the top of the support base (1). Each corner of the support platform body (201) is fitted with a corner locking fastener (202). Both sides of the multiple corner locking fasteners (202) are fixedly connected with limit fixing ears (203). Two first bolts (204) are installed between the multiple limit fixing ears (203) and the support platform body (201). A column mechanism (3) is provided at multiple corners of the support workbench mechanism (2). The column mechanism (3) includes a column body (301). An integrated locking sleeve (302) is provided at the bottom of the outer wall of the column body (301). A locking base plate (303) is fixedly connected to the bottom of the column body (301). Multiple second bolts (304) are installed on the locking base plate (303). The top of the outer wall of the column body (301) is provided with a top self-locking groove (305) and a limiting engagement groove (306). The column body (301), the integrated engagement sleeve (302) and the locking base plate (303) are an integrated structure. Each corner of the support platform body (201) and multiple corner engagement fasteners (202) are provided with grooves corresponding to the column body (301) and the integrated engagement sleeve (302). Each corner of the bottom of the support platform body (201) and the bottom of multiple corner engagement fasteners (202) are provided with two threaded holes corresponding to the second bolts (304). Multiple sides of the support platform body (201) are provided with grooves and threaded holes corresponding to the limiting fasteners (203) and the first bolts (204). A top support plate (4) is installed between the top of the outer walls of the multiple column mechanisms (3). A self-locking engagement mechanism (5) is provided at the corner of the top support plate (4). The self-locking engagement mechanism (5) includes a U-shaped fixing plate (501) fixedly connected to the top of the top support plate (4) and multiple locking triangular blocks (506) slidably connected to the corner of the top support plate (4). An electric rod (502) is installed on the top of the U-shaped fixing plate (501). A connecting plate (503) is fixedly connected to the output end of the electric rod (502). Bolt plate assemblies (504) are fixedly connected to both sides of the bottom of the connecting plate (503). Two irregular drive plates (505) are fixedly connected to the bottom of the two bolt plate assemblies (504). An integrated limit slider (507) is fixedly connected to the top and bottom of the locking triangular block (506). A hydraulic mechanism (6) is installed in the center of the top support plate (4). The output end of the hydraulic mechanism (6) is fixedly connected to a hydraulic plate (7). Each corner of the top of the hydraulic plate (7) is fixedly connected to a limiting locking mechanism (8). The limiting locking mechanism (8) includes a fixed housing (801) fixedly connected to the top corner of the hydraulic plate (7). The inner wall of the fixed housing (801) is slidably connected to two sliding plates (802). Both sides of the two sliding plates (802) are fixedly connected to insertion ears (803). A pin (804) is provided between the two insertion ears (803) corresponding to the two sliding plates (802). Two auxiliary support components (9) are installed between the support workbench mechanism (2) and the top support plate (4).

2. The four-column hydraulic press with convenient column replacement according to claim 1, characterized in that, The top support plate (4) has grooves at each corner corresponding to the locking triangle block (506) and the integrated limiting slider (507), and each corner of the top support plate (4) and the locking triangle block (506) have through holes corresponding to the irregular drive plate (505).

3. The four-column hydraulic press with convenient column replacement according to claim 1, characterized in that, The hydraulic mechanism (6) includes a hydraulic housing (601) fixedly connected to the center of the top support plate (4). A hydraulic rod assembly (602) is slidably connected to the inner wall of the hydraulic housing (601). A pipe connection assembly (603) is fixedly connected to the top side and the bottom side of the outer wall of the hydraulic housing (601).

4. The four-column hydraulic press with convenient column replacement according to claim 1, characterized in that, The auxiliary support assembly (9) includes an L-shaped fixing plate (901), a first reinforcing support frame (902) is fixedly connected to one side of the top of the L-shaped fixing plate (901), a threaded rod (903) is rotatably connected inside the L-shaped fixing plate (901), a movable support plate (904) is slidably connected to the inner wall of the L-shaped fixing plate (901), a sliding limit plate (905) is fixedly connected to one side of the movable support plate (904), and a second reinforcing support frame (906) is fixedly connected to the top of the movable support plate (904).

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