Jig equipment convenient for safe production

By introducing a combination of magnetic pressure head and hydraulic press connector into the riveting equipment, the safety risks and inaccurate riveting problems during the riveting process of cantilever electronic equipment bracket arm riveting, and an efficient and safe automatic riveting process is achieved.

CN222873772UActive Publication Date: 2025-05-16ANHUI HONGJIE ERGONOMIC TECH CO LTD
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Patent Information

Application Number
CN202421623515.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-10
Publication Date
2025-05-16
Estimated Expiration
2034-07-10

AI Technical Summary

Technical Problem

The arms of the existing cantilever electronic equipment brackets have safety risks and inaccurate riveting problems during the riveting process, and are low in production efficiency and high cost.

Method used

A treatment equipment including an oil press and a product positioning vehicle was designed. The magnetic pressure suction head was used in conjunction with the hydraulic press connector. The circular shaft was positioned by magnetic adsorption to ensure that it was coaxial with the arm riveting hole, and automatic riveting was achieved.

Benefits of technology

It improves the safety and accuracy of riveting, reduces the operating risks of workers, improves production efficiency and reduces production costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222873772U_ABST
Patent Text Reader

Abstract

The utility model discloses jig equipment convenient for safety production, which comprises an oil press and a product positioning carrier, the product positioning carrier can be fixedly mounted on a workbench of the oil press and can fix and position an arm product to be riveted, and the jig equipment is further provided with an oil press connector and a magnetic suction pressure head with magnetism. The upper end of the oil press connector can be fixedly installed on a movable cross beam of an oil press, the magnetic suction pressing head is fixedly installed at the lower end of the oil press connector, a circular shaft inserting groove is formed in the lower end of the magnetic suction pressing head, the upper end of a circular shaft to be riveted can be inserted into the circular shaft inserting groove, and the magnetic suction pressing head and the upper end of the circular shaft can be attracted and positioned through magnetic force. A circular shaft inserting groove in the magnetic suction pressing head and a riveting hole of an arm product to be riveted on the product positioning carrier are coaxially and right opposite to each other, the lower end of a circular shaft can be riveted into the riveting hole of the arm product when a movable cross beam of the oil press descends to a specified height, personal safety of workers is guaranteed, riveting efficiency is high, and circular shaft riveting is accurate and stable.
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Description

Technical Field

[0001] The utility model relates to a riveting device, in particular to a processing device which is convenient for safe production. Background Art

[0002] The arms of some cantilever electronic equipment brackets are mostly made of aluminum alloy, and the rotating shaft thereon is riveted into a rivet hole of the arm to achieve a fixed connection between the round shaft and the arm, thereby preventing the round shaft from loosening during the rotation of the arm of the cantilever electronic bracket.

[0003] Since riveting the round shaft and the arm together requires a large and stable pressure, the arm and the round shaft are riveted on a hydraulic press. Currently, when the arm is riveted to the round shaft, the worker first places the arm to be riveted on the product positioning carrier on the workbench of the hydraulic press, and then performs a preliminary positioning of the product to be riveted. Then, the worker places a round shaft in the riveting hole of the arm, and holds the round shaft with one hand and operates the switch of the hydraulic press with the other hand, so that the movable crossbeam of the hydraulic press descends, and the round shaft is pressed into the riveting hole of the arm.

[0004] On the one hand, this method will have a greater safety risk and easily injure workers. On the other hand, it is difficult to ensure that the round shaft is coaxial with the riveting hole during the riveting process, and it is easy to rivet off-center, causing subsequent assembly difficulties. In addition, this riveting method has low production efficiency and high production costs. Utility Model Content

[0005] In order to overcome the above-mentioned defects, the utility model provides a machining device that is convenient for safe production. The machining device that is convenient for safe production can perform circular shaft riveting on the arm of a cantilever bracket with high efficiency and high precision, and the operation is convenient and safe.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a kind of work equipment that is convenient for safe production, including a hydraulic press and a product positioning carrier, the product positioning carrier can be fixedly installed on the workbench of the hydraulic press, the product positioning carrier can fix and position the arm product to be riveted, and is also provided with a hydraulic press connecting head and a magnetic suction pressure head with magnetism, the upper end of the hydraulic press connecting head can be fixedly installed on the movable crossbeam of the hydraulic press, the magnetic suction pressure head is fixedly installed at the lower end of the hydraulic press connecting head, the lower end of the magnetic suction pressure head is provided with a round shaft plug-in groove, the upper end of the round shaft to be riveted can be inserted in the round shaft plug-in groove, and the magnetic suction pressure head can be positioned with the upper end of the round shaft by magnetic attraction, the round shaft plug-in groove on the magnetic suction pressure head is coaxially arranged with the riveting hole of the arm product to be riveted on the product positioning carrier, and when the movable crossbeam of the hydraulic press is lowered to a specified height, the lower end of the round shaft can be riveted into the riveting hole of the arm product.

[0007] As a further improvement of the present invention, the magnetic pressure head includes a pressure head body, a magnet and a bottom plate made of magnetic conductive material, the circular shaft plug-in groove is arranged at the lower end of the pressure head body, the pressure head body is provided with at least one magnet slot, the magnet is inserted in the magnet slot, and the bottom plate can be fixedly covered on the magnet slot opening of the magnetic pressure head and fix the magnet in the pressure head body.

[0008] As a further improvement of the utility model, at least two magnet slots are evenly distributed around the circular shaft insertion slot.

[0009] As a further improvement of the utility model, the magnet slot is a top-to-bottom through structure, the upper opening of the magnet slot is completely covered by the hydraulic press connector, and the lower opening of the magnet slot is completely covered by the bottom plate, and an avoidance hole for the round shaft to pass through is formed on the bottom plate.

[0010] As a further improvement of the present invention, the cross section of the magnet slot is a non-circular structure, and the magnet is a non-circular cylinder with the same shape as the magnet slot.

[0011] As a further improvement of the present invention, at least one non-circular groove structure is formed at the upper end of the ram body, and at least one non-circular protrusion structure is formed at the lower end of the hydraulic press connecting head. The non-circular protrusion structure at the lower end of the hydraulic press connecting head can be inserted into the non-circular groove structure at the upper end of the ram body in a circumferential direction for stopping. At least one first connecting hole is provided at the lower end of the hydraulic press connecting head, and at least one second connecting hole is provided on the ram body. The first connecting hole is connected to the second connecting hole one by one, and a connecting piece is passed through the first connecting hole and the second connecting hole. The connecting piece fixedly connects the ram body and the hydraulic press connecting head to form an integrated structure.

[0012] As a further improvement of the utility model, at least two threaded holes are provided at the lower end of the pressure head body, and at least two through holes are provided on the bottom plate. Connecting screws are passed through the through holes, and the connecting screws are threadedly connected to the threaded holes at the lower end of the pressure head body to fix the bottom plate on the lower end surface of the pressure head body.

[0013] As a further improvement of the present utility model, the product positioning carrier includes a fixed base and a push rod, the fixed base is provided with a plurality of long strip mounting holes, a nut sleeve is formed in the middle of the base, the lower end of the push rod is threadedly connected with the nut sleeve in the middle of the base, and the upper end of the push rod can be inserted into the countersunk head of the countersunk through hole coaxially opposite to the riveting hole at the lower end of the arm product to be riveted.

[0014] As a further improvement of the present invention, a workbench connecting plate is further provided, which can be placed flat on the workbench of the hydraulic press. The workbench connecting plate is provided with a number of elongated connecting holes that are directly opposite to the T-slots on the workbench of the hydraulic press. The workbench connecting plate is also provided with connecting studs or connecting screw holes, which are respectively directly opposite to the elongated mounting holes on the base. The base is fixed and positioned by screwing nuts to the connecting studs inserted in the elongated mounting holes or by screwing bolts passed through the elongated mounting holes to the connecting screw holes on the workbench connecting plate.

[0015] As a further improvement of the present invention, the structure in which the upper end of the hydraulic press connecting head can be fixedly installed on the movable crossbeam of the hydraulic press is: a connecting seat is also provided, a connecting slot is provided at the lower end of the movable crossbeam of the hydraulic press, a threaded connecting hole is provided on the side wall of the movable crossbeam of the hydraulic press, the threaded connecting hole is vertically cross-connected with the connecting slot, the upper end of the connecting seat is inserted into the connecting slot, a tightening bolt is movably screwed in the threaded connecting hole on the side wall of the movable crossbeam of the hydraulic press, the end of the tightening bolt is tightly against the surface of the side wall of the connecting seat so that the connecting seat is fixedly positioned in the connecting slot on the movable crossbeam, a connecting socket is also provided at the lower end of the connecting seat, the hydraulic press connecting head forms a T-shaped column structure with an upper end diameter smaller than a lower end diameter, and the upper end of the hydraulic press connecting head is fixedly inserted into the connecting socket at the lower end of the connecting seat.

[0016] The beneficial effects of the utility model are as follows: the utility model can realize the rapid and accurate positioning of the arm to be riveted on the workbench of the hydraulic press through the product positioning carrier, and can realize the accurate and stable adsorption and positioning of the round shaft to be riveted on the lower end of the movable crossbeam of the hydraulic press through the hydraulic press connecting head and the magnetic magnetic suction pressure head. During the riveting process, the worker does not need to hold the round shaft with his hands. After pressing the hydraulic press button, the round shaft automatically descends with the movable crossbeam of the hydraulic press and is finally accurately pressed into the riveting hole of the arm. After the riveting is completed, the movable crossbeam of the hydraulic press rises and resets, and the round shaft remains in the riveting hole of the arm to complete the riveting. During the entire riveting process, the worker only needs to lower his arm and place it on the product positioning carrier for positioning, and lower the round shaft and insert it into the round shaft insertion groove at the lower end of the magnetic suction pressure head and press the switch. The operation is convenient, and the worker's hands do not need to be under the movable crossbeam of the hydraulic press during the riveting process, which ensures the worker's personal safety and has high riveting efficiency. During the riveting process, it is ensured that the riveting holes of the round shaft and the arm are coaxially facing each other, and the round shaft is riveted accurately and firmly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the utility model before riveting;

[0018] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0019] Figure 3 This is a front view of the utility model before riveting;

[0020] Figure 4 for Figure 3 Middle BB section view;

[0021] Figure 5 for Figure 4 Enlarged view of middle C;

[0022] Figure 6 This is a three-dimensional diagram of the utility model after riveting;

[0023] Figure 7 for Figure 6 Enlarged view of the middle D part;

[0024] Figure 8 This is a front view of the utility model after riveting;

[0025] Fig. 9 for Figure 8 Middle EE section view;

[0026] Fig.10 for Fig. 9 Enlarged view of the middle F part;

[0027] Fig.11 This is a left-side view of the utility model after riveting;

[0028] Fig.12 This is a three-dimensional exploded view of the hydraulic press connector and the magnetic press head;

[0029] Fig.13 This is the front view of the hydraulic press connector and the magnetic press head in assembly state;

[0030] Fig.14 for Fig.13 Middle GG section view;

[0031] Fig.15 A three-dimensional image of the carrier for positioning the product;

[0032] Fig.16 This is the front view of the state where the round shaft is adsorbed in the magnetic pressing head;

[0033] Fig.17 for Fig.16 Middle HH section view;

[0034] Fig.18 This is a three-dimensional image of the arm after the circular shaft is riveted. DETAILED DESCRIPTION

[0035] Embodiment: A processing equipment for facilitating safe production includes a hydraulic press 1 and a product positioning carrier 2, wherein the product positioning carrier 2 can be fixedly mounted on a workbench 11 of the hydraulic press 1, and the product positioning carrier 2 can fix and position an arm product 3 to be riveted, and is also provided with a hydraulic press connector 4 and a magnetic suction head 5, wherein the upper end of the hydraulic press connector 4 can be fixedly mounted on a movable crossbeam 12 of the hydraulic press 1, and the magnetic suction head 5 is fixedly mounted on the lower end of the hydraulic press connector 4. A round shaft insertion groove 511 is provided at the lower end of the magnetic pressure head 5, and the upper end of the round shaft 6 to be riveted can be inserted in the round shaft insertion groove 511, and the magnetic pressure head 5 can be positioned with the upper end of the round shaft 6 by magnetic attraction. The round shaft insertion groove 511 on the magnetic pressure head 5 is coaxially arranged opposite to the riveting hole 31 of the arm product 3 to be riveted on the product positioning carrier 2. When the movable crossbeam 12 of the hydraulic press 1 descends to a specified height, the lower end of the round shaft 6 can be riveted into the riveting hole 31 of the arm product 3.

[0036] During assembly, first place the arm product 3 on the product positioning carrier 2 for support and positioning, and then insert the round shaft 6 into the round shaft insertion groove 511 at the lower end of the magnetic pressure head 5. The round shaft 6 is magnetically attracted by the magnetic pressure head 5 and will not fall off. At this time, start the hydraulic press 1, and the movable crossbeam 12 of the hydraulic press 1 descends and accurately inserts the round shaft 6 into the rivet hole 31 of the arm product 3. As the movable crossbeam 12 of the hydraulic press 1 continues to descend, the round shaft 6 is riveted into the rivet hole 31 of the arm, and then the movable crossbeam 12 of the hydraulic press 1 is operated to rise and reset, and the arm product 3 riveted with the round shaft 6 can be removed. During the entire riveting process, the workers' hands are not directly under the movable crossbeam 12 of the hydraulic press 1, so the operation is safe, and the round shaft 6 can always remain coaxial with the rivet hole 31 of the arm. The round shaft 6 is riveted accurately, and the entire riveting process is fast, which improves the riveting efficiency and reduces the production cost.

[0037] The magnetic pressure head 5 includes a pressure head body 51 made of magnetic conductive material, a magnet 52 and a bottom plate 53. The circular shaft plug-in slot 511 is provided at the lower end of the pressure head body 51. The pressure head body 51 is provided with at least one magnet slot 512. The magnet 52 is inserted into the magnet slot 512. The bottom plate 53 can be fixedly covered on the opening of the magnet slot 512 of the magnetic pressure head 5 and the magnet 52 is fixedly sealed in the pressure head body 51. The magnetic pressure head 5 adopts a split structure, which is easy to manufacture. The pressure head body 51 is preferably made of iron, which has high strength and good magnetic conductivity.

[0038] At least two magnet slots 512 are evenly distributed around the circular shaft plug-in slot 511. The magnet 52 is placed in the press head body 51 and installed outside the circumference of the circular shaft plug-in slot 511, so that the center point of the magnetic pressure head 5 maintains the maximum magnetic field attraction to prevent the circular shaft 6 from falling during the riveting process. The magnet slots 512 can be two, three, four or more, which is an equivalent replacement structure that can be easily thought of by those skilled in the art based on this patent and falls within the protection scope of this patent.

[0039] The magnet slot 512 is a vertical through structure, the upper opening of the magnet slot 512 is completely covered by the hydraulic press connector 4, and the lower opening of the magnet slot 512 is completely covered by the bottom plate 53, and the bottom plate 53 is formed with an avoidance hole 531 for the round shaft 6 to pass through. The pressure head body 51 of this structure is easy to manufacture and has a low processing cost.

[0040] The cross section of the magnet slot 512 is a non-circular structure, and the magnet 52 is a non-circular cylinder with the same shape as the magnet slot 512. The cross section of the magnet slot 512 can be a rectangular structure, a square structure, or an arc structure, etc., which is convenient for stopping and positioning.

[0041] At least one non-circular groove structure 513 is formed at the upper end of the pressure head body 51, and at least one non-circular protrusion structure 41 is formed at the lower end of the oil hydraulic press connector 4. The non-circular protrusion structure 41 at the lower end of the oil hydraulic press connector 4 can be inserted into the non-circular groove structure 513 at the upper end of the pressure head body 51 in a circumferential direction. At least one first connection hole 42 is provided at the lower end of the oil hydraulic press connector 4, and at least one second connection hole 514 is provided on the pressure head body 51. The first connection hole 42 is directly connected to the second connection hole 514 one by one. A connecting piece is inserted into the first connection hole 42 and the second connection hole 514. The connecting piece fixes the pressure head body 51 and the oil hydraulic press connector 4 to form an integrated structure. The above structure can realize the stable connection between the pressure head body 51 and the oil hydraulic press connector 4, and prevent the connection screws from loosening due to relative rotation between the two.

[0042] The lower end of the pressure head body 51 is provided with at least two threaded holes 515, and the bottom plate 53 is provided with at least two through holes 532. Connecting screws are passed through the through holes 532. The connecting screws are threadedly connected to the threaded holes 515 at the lower end of the pressure head body 51 to fix the bottom plate 53 on the lower end surface of the pressure head body 51.

[0043] The product positioning carrier 2 includes a fixed base 21 and a push rod 22. The fixed base 21 is provided with a plurality of long strip mounting holes 211. A nut sleeve 212 is formed in the middle of the base. The lower end of the push rod 22 is threadedly connected to the nut sleeve 212 in the middle of the base. The upper end of the push rod 22 can be inserted into the countersunk head of the countersunk through hole 32 coaxially opposite to the riveting hole 31 at the lower end of the arm product 3 to be riveted. When placing the arm product 3, it is only necessary to put the countersunk through hole 32 coaxially opposite to the riveting hole 31 on the arm on the upper end of the push rod 22, and the push rod 22 can achieve stable support and positioning of the riveted part of the arm. When riveting, the arm can be grasped by hand and extended to the other end of the hydraulic press 1, or a positioning groove matching the shape of the arm can be set on the product positioning carrier 2 to stop and position the entire arm.

[0044] A workbench connecting plate 23 is also provided, and the workbench connecting plate 23 can be placed flat on the workbench 11 of the hydraulic press 1. The workbench connecting plate 23 is provided with a plurality of long strip connecting holes 231 that are directly opposite to the T-slots on the workbench 11 of the hydraulic press 1. The workbench connecting plate 23 is also provided with connecting studs or connecting screw holes that are respectively directly opposite to the long strip mounting holes 211 on the base. The base is fixed and positioned by screwing nuts with connecting studs inserted in the long strip mounting holes 211 or by screwing bolts penetrating in the long strip mounting holes 211 with connecting screw holes on the workbench connecting plate 23. By providing the workbench connecting plate 23, it is convenient to position and adjust the position of the product positioning carrier 2 on the workbench 11.

[0045] The structure in which the upper end of the hydraulic press connecting head 4 can be fixedly installed on the movable crossbeam 12 of the hydraulic press 1 is as follows: a connecting seat 7 is also provided, a connecting slot is provided at the lower end of the movable crossbeam 12 of the hydraulic press 1, a threaded connecting hole 121 is provided on the side wall of the movable crossbeam 12 of the hydraulic press 1, the threaded connecting hole 121 is vertically cross-connected with the connecting slot, the upper end of the connecting seat 7 is inserted into the connecting slot, a tightening bolt is movably screwed in the threaded connecting hole 121 on the side wall of the movable crossbeam 12 of the hydraulic press 1, the end of the tightening bolt is tightly against the side wall surface of the connecting seat 7 so that the connecting seat 7 is fixedly positioned in the connecting slot on the movable crossbeam 12, a connecting socket is also provided at the lower end of the connecting seat 7, the hydraulic press connecting head 4 forms a T-shaped column structure with an upper end diameter smaller than a lower end diameter, and the upper end of the hydraulic press connecting head 4 is fixedly inserted into the connecting socket at the lower end of the connecting seat 7.

Claims

1. A processing equipment for facilitating safe production, comprising a hydraulic press (1) and a product positioning carrier (2), wherein the product positioning carrier can be fixedly mounted on a workbench (11) of the hydraulic press, and the product positioning carrier can fix and position an arm product (3) to be riveted, characterized in that: A hydraulic press connector (4) and a magnetic pressure head (5) having magnetism are also provided. The upper end of the hydraulic press connector can be fixedly mounted on the movable crossbeam (12) of the hydraulic press, and the magnetic pressure head is fixedly mounted on the lower end of the hydraulic press connector. The lower end of the magnetic pressure head is provided with a round shaft insertion groove (511), and the upper end of the round shaft (6) to be riveted can be inserted into the round shaft insertion groove, and the magnetic pressure head can be positioned with the upper end of the round shaft by magnetic attraction. The round shaft insertion groove on the magnetic pressure head is coaxially arranged with the riveting hole (31) of the arm product to be riveted on the product positioning carrier. When the movable crossbeam of the hydraulic press is lowered to a specified height, the lower end of the round shaft can be riveted into the riveting hole of the arm product.

2. The processing equipment for facilitating safe production according to claim 1 is characterized in that: The magnetic pressure head comprises a pressure head body (51) made of magnetic conductive material, a magnet (52) and a bottom plate (53), the circular shaft plug-in groove is arranged at the lower end of the pressure head body, the pressure head body is provided with at least one magnet slot (512), the magnet is inserted in the magnet slot, and the bottom plate can be fixedly covered on the magnet slot opening of the magnetic pressure head and fix the magnet in the pressure head body.

3. The processing equipment for facilitating safe production according to claim 2 is characterized in that: At least two magnet slots are evenly distributed around the circular shaft plug-in slot.

4. The processing equipment for facilitating safe production according to claim 2 is characterized in that: The magnet slot is a vertical through structure, the upper opening of the magnet slot is completely covered by the hydraulic press connector, and the lower opening of the magnet slot is completely covered by the bottom plate, and an avoidance hole (531) is formed on the bottom plate for the round shaft to pass through.

5. The processing equipment for facilitating safe production according to claim 4 is characterized in that: The cross section of the magnet slot is a non-circular structure, and the magnet is a non-circular cylinder with the same shape as the magnet slot.

6. The processing equipment for facilitating safe production according to claim 4 is characterized in that: At least one non-circular groove structure (513) is formed at the upper end of the pressure head body, and at least one non-circular protrusion structure (41) is formed at the lower end of the hydraulic press connecting head. The non-circular protrusion structure at the lower end of the hydraulic press connecting head can be inserted into the non-circular groove structure at the upper end of the pressure head body in a circumferentially fixed manner. At least one first connecting hole (42) is provided at the lower end of the hydraulic press connecting head, and at least one second connecting hole (514) is provided on the pressure head body. The first connecting hole and the second connecting hole are connected to each other one by one. Connecting pieces are inserted into the first connecting hole and the second connecting hole. The connecting piece fixes the pressure head body and the hydraulic press connecting head to form an integrated structure.

7. The processing equipment for facilitating safe production according to claim 4 is characterized in that: The lower end of the pressure head body is provided with at least two threaded holes (515), and the bottom plate is provided with at least two through holes (532). Connecting screws are passed through the through holes. The connecting screws are threadedly connected to the threaded holes at the lower end of the pressure head body to fix the bottom plate on the lower end surface of the pressure head body.

8. The processing equipment for facilitating safe production according to claim 1 is characterized in that: The product positioning carrier comprises a fixed base (21) and a push rod (22), wherein the fixed base is provided with a plurality of long strip mounting holes (211), a nut sleeve (212) is formed in the middle of the base, the lower end of the push rod is threadedly connected to the nut sleeve in the middle of the base, and the upper end of the push rod can be inserted into the countersunk head of the countersunk through hole (32) coaxially opposite to the riveting hole at the lower end of the arm product to be riveted.

9. The processing equipment for facilitating safe production according to claim 8 is characterized in that: A workbench connecting plate (23) is also provided, and the workbench connecting plate can be placed flat on the workbench of the hydraulic press. The workbench connecting plate is provided with a plurality of elongated connecting holes (231) that are directly opposite to the T-slots on the workbench of the hydraulic press. The workbench connecting plate is also provided with connecting studs or connecting screw holes, and the connecting studs or connecting screw holes are respectively directly opposite to the elongated mounting holes on the base. The base is fixed and positioned by screwing nuts with connecting studs inserted in the elongated mounting holes or by screwing bolts penetrating in the elongated mounting holes with the connecting screw holes on the workbench connecting plate.

10. The processing equipment for facilitating safe production according to claim 1, characterized in that: The structure in which the upper end of the hydraulic press connecting head can be fixedly installed on the movable crossbeam of the hydraulic press is as follows: a connecting seat (7) is also provided, a connecting slot is provided at the lower end of the movable crossbeam of the hydraulic press, a threaded connecting hole (121) is provided on the side wall of the movable crossbeam of the hydraulic press, the threaded connecting hole is vertically cross-connected with the connecting slot, the upper end of the connecting seat is inserted into the connecting slot, a tightening bolt is movably screwed in the threaded connecting hole on the side wall of the movable crossbeam of the hydraulic press, the end of the tightening bolt is tightly against the surface of the side wall of the connecting seat so that the connecting seat is fixedly positioned in the connecting slot on the movable crossbeam, a connecting socket is also provided at the lower end of the connecting seat, the hydraulic press connecting head forms a T-shaped column structure with an upper end diameter smaller than a lower end diameter, and the upper end of the hydraulic press connecting head is fixedly inserted into the connecting socket at the lower end of the connecting seat.