Hydraulic machine with movable upper workbench

Abstract

The invention discloses a hydraulic machine with a movable upper workbench, which relates to the technical field of hydraulic machines and comprises a lower beam, a stand column, a sliding block, a main cylinder, the upper workbench, an upper platform and an upper balance cylinder. The device has the effects of reducing the weight of the upper workbench and moving the upper workbench, three sets of bevel gear boxes are arranged at the top end of the upper workbench, and the two sets of bevel gear boxes at the front end and the rear end are connected with worm gear cases through couplings and second dowel bars, so that the worm gear cases can move along four sets of stand columns; the working stroke of the upper workbench can be effectively shortened, the working efficiency is improved, the adjusting mechanism is arranged at the middle end of the bottom of the upper workbench, the adjusting mechanism comprises a cavity, a telescopic mechanism, a rotating mechanism, a bottom plate and other assemblies, the bottom plate on the bottom face of the upper workbench can be rotated, and the angle of the bottom plate can be adjusted; and machining of special workpieces is facilitated, the flexibility can be effectively improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic presses, and specifically relates to a hydraulic press with a movable upper workbench. Background Art

[0002] Existing hydraulic presses generally use large openings and large strokes to meet the working conditions, that is, the stroke of the oil cylinder is lengthened, and the distance from the workbench to the slider is lengthened to be able to cover all processed parts, and manual nut adjustment or step adjustment is adopted.

[0003] However, the lengthened stroke and increased opening may lead to increased manufacturing costs and are not conducive to work, which may reduce work efficiency. For manual nut adjustment, the accuracy needs to be re-detected, which is rather cumbersome. Step adjustment means machining equidistant notches on the columns, and then after moving the upper workbench, locking it through the buckle body. In terms of adjustment, it is not convenient. It is applicable to small machines, but the scope of application is limited. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydraulic press with a movable upper workbench to solve the problems proposed in the above background art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A hydraulic press with a movable upper workbench includes a lower beam. At the four ends of the top surface of the lower beam, a set of columns are provided. At the upper and lower ends of the four sets of columns, fastening nuts are connected, and the lower ends all penetrate and extend to the bottom end of the lower beam. The top end of the lower beam is connected with a set of sliders through a main cylinder. At the top end of the slider, a set of moving platforms are provided. At a position near the top end of the four sets of columns, a set of upper workbenches are connected. At the top end of the upper workbench, a set of upper platforms are connected. In the middle of the top surface of the upper platform, two sets of upper balance cylinders are provided. The output ends of the two sets of upper balance cylinders all penetrate the upper platform and are connected to the top surface of the upper workbench.

[0006] By adopting the above technical solutions, the lower beam and the upper platform are fixed through the four sets of columns and the fastening nuts at the upper and lower ends to form a rigid frame structure, which can ensure the overall stability. The upper workbench can move up and down along the four sets of columns, freely adjust the height, improve the use flexibility, and the upper workbench can be pulled by the upper balance cylinder, which can effectively reduce the self-weight of the upper workbench and reduce the motor power requirement when moving the upper workbench.

[0007] Preferably, three bevel gear boxes are equidistantly arranged at the middle end of the top surface of the upper workbench. Two adjacent bevel gear boxes are connected by a first force transmission rod. Couplings are provided at the front and rear ends of the first force transmission rod. The left and right ends of the front and rear bevel gear boxes are respectively connected to two worm gear boxes through second force transmission rods. The four worm gear boxes are respectively connected to the outer tops of the four columns. Couplings are provided at both ends of the second force transmission rod. The right end of the middle bevel gear box is connected to the driving end of the motor reducer through a coupling. An adjusting mechanism is provided at the middle end of the bottom of the upper workbench.

[0008] By adopting the above technical solution, driven by the motor reducer, the bevel gear box, the first force transmission rod and the second force transmission rod perform torque distribution and transmission, so that the worm gear box can drive the upper workbench to move up and down along the column.

[0009] Preferably, the adjusting mechanism includes a cavity, a telescopic mechanism, a rotating mechanism and a bottom plate. A cavity is opened at the middle end of the bottom of the upper workbench. A telescopic mechanism is connected to the inner top end of the cavity. The bottom end of the telescopic mechanism is connected to a rotating mechanism. The bottom end of the rotating mechanism is connected to a bottom plate.

[0010] By adopting the above technical solution, the telescopic mechanism can push down the rotating mechanism and the bottom plate to leave an activity space for the bottom plate to rotate. The rotating mechanism can drive the bottom plate to rotate and change the angle of the adjusting bottom plate to meet different working requirements.

[0011] Preferably, the telescopic mechanism includes a rotating rod, a transmission belt, a driving motor, external threads, a first moving block, a connecting arm, a second moving block, a telescopic arm and a connecting bracket. A group of rotating rods are provided at the top ends of the left and right surfaces in the cavity. The middle end of the rotating rod is connected to the driving shaft of a group of driving motors through a transmission belt. External threads are provided at the left and right ends of the rotating rod. A group of first moving blocks are provided at the left and right ends of the left and right external threads. A group of connecting arms are respectively connected to the front and rear surfaces of two adjacent first moving blocks. The other ends of the two connecting arms are respectively connected to the front and rear surfaces of the second moving block. A group of telescopic arms are connected to the top end of the second moving block. A group of connecting brackets are provided at the top end of the telescopic arm.

[0012] By adopting the above technical solution, the driving motor can drive the rotating rod to rotate through the transmission belt, and then drive the two first moving blocks at both ends of the rotating rod to move relatively along the external threads, realizing symmetric telescoping, and can push down or retract the two second moving blocks at the same time.

[0013] Preferably, the rotating mechanism includes a fixed seat, electric push rods, an activity groove and an auxiliary mechanism. The left and right ends of the top surface of the fixed seat are respectively connected to the bottom surfaces of two sets of second moving blocks. A set of electric push rods are provided at the four inner ends of the fixed seat. The output ends of the four sets of electric push rods all penetrate and extend to the bottom end of the fixed seat and are connected to the bottom plate. An activity groove is opened at the middle end of the bottom of the fixed seat, and no less than two sets of auxiliary mechanisms are provided at the inner top end of the activity groove.

[0014] By adopting the above technical solution, the output ends of the four sets of electric push rods can push out or retract to drive the bottom plate to freely adjust the angle. The activity groove can provide space for the rotation of the bottom plate to ensure the smoothness of the movement and reduce unnecessary friction or vibration.

[0015] Preferably, the components of the auxiliary mechanism are all the same. The auxiliary mechanism includes a groove, a sleeve, a fixed shaft, a rolling wheel and a limiting rod. No less than two sets of grooves are opened at the inner top end of the activity groove. A set of sleeves are provided in each of the grooves. A set of rolling wheels are connected to the middle end of each sleeve through a fixed shaft. The front and rear ends of the fixed shaft penetrate the sleeve and extend into the groove and are connected to the front and rear surfaces in the groove. A set of limiting rods are connected to the middle end of the bottom of each sleeve.

[0016] By adopting the above technical solution, no less than two sets of auxiliary mechanisms are provided, which can jointly share the dynamic load in the activity groove, effectively improve the load balance and impact resistance of the activity groove, and the sleeve can be embedded inside the groove to achieve a hidden integrated design, reduce the occupation of external space and ensure the tightness between components.

[0017] Preferably, the four ends of the top surface of the bottom plate are respectively hinged to the output ends of the four sets of electric push rods. A convex plate is provided at the middle end of the top surface of the bottom plate, and a limiting groove corresponding to the limiting rod is provided at the top end of the convex plate.

[0018] By adopting the above technical solution, the bottom plate can be adjusted left and right in angle by the output of the four sets of electric push rods, and the convex plate can be inserted into the activity groove to ensure the smoothness when the bottom plate rotates.

[0019] Preferably, the middle end of the bottom of the sleeve is provided with a notch, and the limiting rod penetrates the limiting groove and is connected in the notch.

[0020] By adopting the above technical solution, the top end of the convex plate can move in the notch, and the movement path of the convex plate is restricted by the limiting rod.

[0021] Preferably, the top surface of the convex plate and the inner top surface of the activity groove are both arc-shaped, and the bottom end of the rolling wheel can contact the top surface of the convex plate.

[0022] By adopting the above technical solution, unnecessary friction between the convex plate and the movable groove can be reduced, and slight vibrations can be absorbed by the rolling wheels, reducing shock transmission, avoiding jamming, and ensuring the stability of the movement.

[0023] Preferably, the left and right end components of the rotating rod are the same, and the two sets of external threads are each divided into left and right parts, and the directions of the external threads of the left and right parts are opposite.

[0024] By adopting the above technical solution, when the rotating rod rotates, the first moving blocks on the outside of the external threads can be driven to move relative to each other through the opposite external threads respectively arranged at both ends, realizing symmetric expansion and contraction.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. In this application, through the upper balance cylinder arranged at the top of the upper platform, the output ends of the upper balance cylinder all penetrate the upper platform and are connected to the upper workbench. When the motor reducer drives the upper workbench to move up and down, the self-weight of the upper workbench basically does not need to be considered, and only the influence of the friction of the kinematic pair needs to be considered, which can reduce and lighten the power of the motor reducer and reduce the production and manufacturing cost.

[0027] 2. In this application, through the upper balance cylinder arranged at the top of the upper platform, the output ends of the upper balance cylinder all penetrate the upper platform and are connected to the upper workbench, balancing its weight during the up and down movement of the upper workbench, reducing the power of the motor reducer, and the balancing counterweight method is simple and clear, the manufacturing is simple, and the application prospect is wide.

[0028] 3. In this application, through the adjusting mechanism arranged at the middle bottom end of the upper workbench, the adjusting mechanism includes components such as a cavity, a telescopic mechanism, a rotating mechanism and a bottom plate, etc. The rotating mechanism and the bottom plate can be pushed downward by the telescopic mechanism, and then the bottom plate can be rotated by the rotating mechanism, so as to change and adjust the bottom surface angle of the upper workbench, which is convenient for the processing of special workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the front view structural schematic diagram of the first embodiment of this application;

[0030] Figure 2 is the front view structural schematic diagram of the second embodiment of this application;

[0031] Figure 3 is the right view structural schematic diagram of the third embodiment of this application;

[0032] Figure 4 is the top view structural schematic diagram of the top surface of the upper workbench of this application;

[0033] Figure 5 is the structural schematic diagram of the adjusting mechanism of this application;

[0034] Figure 6It is a schematic diagram of the partial structure of the telescopic mechanism of the present application;

[0035] Figure 7 It is a schematic diagram of the structure of the rotating mechanism of the present application;

[0036] Figure 8 It is a schematic diagram of the internal structure of the auxiliary mechanism of the present application;

[0037] Figure 9 It is a schematic sectional view of the auxiliary mechanism of the present application.

[0038] In the figure: lower beam - 1, column - 2, slider - 3, main cylinder - 4, upper workbench - 5, upper platform - 6, upper balance cylinder - 7, balance counterweight - 8, lower balance cylinder - 9, fastening nut - 21, moving table - 31, bevel gear box - 51, first force transmission rod - 52, coupling - 53, second force transmission rod - 54, worm gear box - 55, motor reducer - 56, adjusting mechanism - 57, cavity - 571, telescopic mechanism - 572, rotating mechanism - 573, bottom plate - 574, rotating rod - 5721, transmission belt - 5722, drive motor - 5723, external thread - 5724, first moving block - 5725, connecting arm - 5726, second moving block - 5727, telescopic arm - 5728, connecting bracket - 5729, fixed seat - 5731, electric push rod - 5732, movable groove - 5733, auxiliary mechanism - 5734, groove - 57341, sleeve - 57342, fixed shaft - 57343, rolling wheel - 57344, limiting rod - 57345, convex plate - 5741, limiting groove - 5742, pulley assembly - 81, steel wire rope - 82. Detailed implementation manners

[0039] In order to further explain the technical solution of the present invention, it will be elaborated in detail through specific embodiments below.

[0040] Please refer to Figures 1-9 , the present invention provides a hydraulic press with a movable upper workbench, including:

[0041] Embodiment 1:

[0042] A hydraulic press with a movable upper workbench, referring to Figure 1, including a lower beam 1, with a set of columns 2 installed at the four ends of the top surface of the lower beam 1. Fastening nuts 21 are threadedly connected to the upper and lower ends of the four sets of columns 2, and the lower ends of the four sets of columns 2 all penetrate and extend to the bottom end of the lower beam 1. A set of sliders 3 are fixedly connected to the top of the lower beam 1 through a main cylinder 4. A set of moving platforms 31 are provided at the top of the sliders 3. Among them, when the sliders 3 return to the lower limit position, the moving platforms 31 can move forward and separate. A set of upper worktables 5 are connected at a position near the top of the four sets of columns 2. The upper worktables 5 can move up and down along the four sets of columns 2. And a set of upper platforms 6 are fixedly connected at a position near the top of the upper worktables 5 of the four sets of columns 2. The lower beam 1 and the upper platforms 6 are fixed by the fastening nuts 21 at the upper and lower ends of the four sets of columns 2 to form a rigid frame structure, which can ensure the overall stability. Among them, two upper balance cylinders 7 are installed at the middle of the top surface of the upper platform 6, and the output ends of the two upper balance cylinders 7 all penetrate the upper platform 6 and are fixedly connected to the left and right ends of the top surface of the upper worktables 5.

[0043] Specifically, the upper worktables 5 can move up and down along the four sets of columns 2, freely adjust the height, improve the use flexibility, and adjust the pressure of the oil in the lower cavity of the oil cylinder through the upper balance cylinders 7 to balance the weight of the upper worktable 5 components. When the upper worktables 5 rise, oil with equal pressure needs to be supplemented through the oil pump motor group. When descending, oil is discharged through the overflow valve to assist in pulling or pushing the upper worktables 5, which can effectively reduce the self-weight of the upper worktables 5 and reduce the motor power requirement when moving the upper worktables 5.

[0044] Embodiment 2:

[0045] A hydraulic press with a movable upper worktable, referring to Figure 2 , including a lower beam 1, with a set of columns 2 installed at the four ends of the top surface of the lower beam 1. Fastening nuts 21 are threadedly connected to the upper and lower ends of the four sets of columns 2, and the lower ends of the four sets of columns 2 all penetrate and extend to the bottom end of the lower beam 1. A set of sliders 3 are fixedly connected to the top of the lower beam 1 through a main cylinder 4. A set of moving platforms 31 are provided at the top of the sliders 3. Among them, when the sliders 3 return to the lower limit position, the moving platforms 31 can move forward and separate. A set of upper worktables 5 are connected at a position near the top of the four sets of columns 2. The upper worktables 5 can move up and down along the four sets of columns 2. And a set of upper platforms 6 are fixedly connected at a position near the top of the upper worktables 5 of the four sets of columns 2. The lower beam 1 and the upper platforms 6 are fixed by the fastening nuts 21 at the upper and lower ends of the four sets of columns 2 to form a rigid frame structure, which can ensure the overall stability. Among them, a pulley assembly 81 is installed on the upper platform 6. A steel wire rope 82 passes through the upper surface of the pulley assembly 81. One end of the steel wire rope 82 is connected to the upper worktable 5 components, and the other end is connected to the balance weight 8.

[0046] Specifically, the upper workbench 5 can move up and down along the four groups of columns 2, freely adjust its height, improve the flexibility of use, and when moving, it can be connected to the balance weight 8 through the steel wire rope 82, so that its weight is balanced, reduce the self-weight of the upper workbench 5, and can reduce the motor power requirement for moving the upper workbench 5.

[0047] It should be noted that the pulley assembly 81 is a common existing component, which allows the steel wire rope 82 to move outside it to balance the weights at both ends. The specific structure will not be elaborated here.

[0048] Embodiment 3:

[0049] A hydraulic press with a movable upper workbench, referring to Figure 3 , includes a lower beam 1. At the four ends of the top surface of the lower beam 1, a group of columns 2 are installed. At the upper and lower ends of the four groups of columns 2, fastening nuts 21 are threadedly connected. And the lower ends of the four groups of columns 2 all penetrate and extend to the bottom end of the lower beam 1. The top end of the lower beam 1 is fixedly connected with a group of sliders 3 through a main cylinder 4. At the top end of the slider 3, there is a group of movable platforms 31. Among them, when the slider 3 returns to the lower limit position, the movable platform 31 can move forward and separate. At a position close to the top of the four groups of columns 2, a group of upper workbenches 5 are connected. The upper workbench 5 can move up and down along the four groups of columns 2. And at a position close to the top end of the upper workbench 5 on the four groups of columns 2, a group of upper platforms 6 are fixedly connected. The lower beam 1 and the upper platform 6 are fixed by the fastening nuts 21 at the upper and lower ends of the four groups of columns 2 to form a rigid frame structure, which can ensure the overall stability. Among them, at the left and right ends of the top surface of the lower beam 1, between the front and rear two groups of columns 2, a group of lower balance cylinders 9 are installed. The bottom end of the lower balance cylinder 9 is fixedly connected to the top surface of the lower beam 1, and the top end of the output end is fixedly connected to the left and right ends of the bottom surface of the upper workbench 5, which can assist the up and down movement of the upper workbench 5.

[0050] Specifically, the upper workbench 5 can move up and down along the four groups of columns 2, freely adjust its height, improve the flexibility of use, and adjust the pressure of the oil in the lower chamber of the oil cylinder through the upper balance cylinder 7 to balance it with the weight of the upper workbench 5 assembly. When the upper workbench 5 rises, equal-pressure oil is supplemented through the oil pump motor group, and when it descends, oil is discharged through the overflow valve to assist in pulling or pushing the upper workbench 5, which can effectively reduce the self-weight of the upper workbench 5 and reduce the motor power requirement for moving the upper workbench 5.

[0051] Referring to Figures 4-5, three bevel gear boxes 51 are equidistantly installed at the middle end of the top surface of the upper workbench 5. The three bevel gear boxes 51 are located on a straight line, and the front and rear adjacent bevel gear boxes 51 are connected by a first transmission rod 52 and a coupling 53. The left and right ends of the front and rear bevel gear boxes 51 are respectively connected to two worm gear boxes 55 through a second transmission rod 54 and a coupling 53. The four worm gear boxes 55 are respectively threadedly connected to the outer top ends of the four columns 2. Among them, trapezoidal threads are machined on the outer top ends of the four columns 2, which can be engaged with the movable nuts inside the worm gear boxes 55 to drive the worm gear boxes 55 to move up and down along the columns 2. The right end of the middle bevel gear box 51 is connected to the driving end of the motor reducer 56 through a coupling 53, and an adjusting mechanism 57 is provided at the bottom middle end of the upper workbench 5.

[0052] Specifically, driven by the motor reducer 56, the bevel gear box 51, the first transmission rod 52 and the second transmission rod 54 perform torque distribution and transmission, realizing synchronous transmission of one divided into two and two divided into four, which can drive the upper workbench 5 and its components thereon to move together, and evenly distribute the power to the worm gear boxes 55 located at the four ends of the top of the upper workbench 5, thereby driving the upper workbench 5 to move up and down along the columns 2.

[0053] Refer to Figure 5 , the adjusting mechanism 57 includes a cavity 571, a telescopic mechanism 572, a rotating mechanism 573 and a bottom plate 574. A cavity 571 is opened at the bottom middle end of the upper workbench 5. The inner top end of the cavity 571 is connected to a telescopic mechanism 572. The bottom end of the telescopic mechanism 572 is connected to a rotating mechanism 573. The bottom end of the rotating mechanism 573 is installed with a bottom plate 574.

[0054] Specifically, the telescopic mechanism 572 can push down the rotating mechanism 573 and the bottom plate 574 to leave an activity space for the bottom plate 574 to rotate. The rotating mechanism 573 can drive the bottom plate 574 to rotate left and right, changing the angle of the adjusting bottom plate 574 to adapt to different working requirements.

[0055] Refer to Figures 5-6, the telescopic mechanism 572 includes a rotating rod 5721, a transmission belt 5722, a driving motor 5723, external threads 5724, a first moving block 5725, a connecting arm 5726, a second moving block 5727, a telescopic arm 5728 and a connecting bracket 5729. At the top ends of the left and right surfaces in the cavity 571, a set of rotating rods 5721 are rotatably connected. The middle ends of the rotating rods 5721 are connected to the drive shafts of a set of driving motors 5723 through the transmission belt 5722. When the drive shafts of the driving motors 5723 rotate, they can drive the rotating rods 5721 to rotate. Among them, the components at the left and right ends of the rotating rod 5721 are the same. External threads 5724 are machined at both the left and right ends of the rotating rod 5721, and the left and right sets of external threads 5724 are each divided into left and right parts, and the directions of the external threads 5724 in the left and right parts are opposite. A set of first moving blocks 5725 are sleeved on the outer sides of the left and right parts of the external threads 5724. Internal threaded holes corresponding to the external threads 5724 are opened at the inner ends of the first moving blocks 5725. A set of connecting arms 5726 are respectively connected to the front and rear surfaces of adjacent sets of first moving blocks 5725. The other ends of the two sets of connecting arms 5726 are respectively connected to the front and rear surfaces of the second moving block 5727. And the bottom end of the second moving block 5727 is fixedly connected to the top surface of the fixed seat 5731. A set of telescopic arms 5728 are fixedly connected to the top end of the second moving block 5727. A set of "U"-shaped connecting brackets 5729 are fixedly connected to the top ends of the extending ends of the telescopic arms 5728. The rotating rod 5721 is located inside the "U"-shaped connecting bracket 5729. The top ends of the "U"-shaped connecting brackets 5729 are fixedly connected to the inner top surface of the cavity 571.

[0056] Specifically, the driving motor 5723 can drive the rotating rod 5721 to rotate through the transmission belt 5722, thereby driving the two sets of first moving blocks 5725 at both ends of the rotating rod 5721 to move relative to each other along the external threads 5724, realizing symmetric telescoping. At the same time, the two sets of connecting arms 5726 push the second moving block 5727 downward. The second moving block 5727 can stretch the telescopic arm 5728 to move downward and push the fixed seat 5731 downward.

[0057] Refer to Figures 5-7 , the rotation mechanism 573 includes a fixed seat 5731, an electric push rod 5732, a movable groove 5733 and an auxiliary mechanism 5734. The left and right ends of the top surface of the fixed seat 5731 are respectively fixedly connected to the bottom surfaces of the two sets of second moving blocks 5727. A set of electric push rods 5732 are installed at the four inner ends of the fixed seat 5731. The bottom ends of the output ends of the four sets of electric push rods 5732 all penetrate and extend to the bottom end of the fixed seat 5731 and are hinged to the four ends of the top surface of the bottom plate 574. The left and right sets of output ends of the electric push rods 5732 can be used to adjust the left and right rotation of the bottom plate 574. A set of movable grooves 5733 are opened at the middle bottom end of the fixed seat 5731. No less than two sets of auxiliary mechanisms 5734 are installed at the inner top end of the movable groove 5733.

[0058] Specifically, the four sets of electric push rods 5732 can push out or retract the output end to drive the bottom plate 574 to freely adjust the left and right angles. The movable slots 5733 can provide space for the rotation of the bottom plate 574 to ensure the smoothness of the movement and reduce unnecessary friction or vibration.

[0059] Refer to Figures 7-9 , the components of the auxiliary mechanism 5734 are all the same. The auxiliary mechanism 5734 includes grooves 57341, sleeves 57342, fixed shafts 57343, rolling wheels 57344 and limit rods 57345. There are no less than two groups of grooves 57341 opened at the top end inside the movable slot 5733. A set of sleeves 57342 are built in each of the grooves 57341. A set of rolling wheels 57344 are connected by fixed shafts 57343 in the middle of the sleeves 57342. The rolling wheels 57344 are rotatably connected to the fixed shafts 57343 and can rotate in the middle of the outer side of the fixed shafts 57343. Among them, the front and rear ends of the fixed shafts 57343 penetrate through the sleeves 57342 and extend into the grooves 57341 and are fixedly connected to the front and rear surfaces inside the grooves 57341, so as to fix the sleeves 57342 in the grooves 57341. Among them, the bottom end of the sleeve 57342 extends to the top end inside the movable slot 5733, and the middle bottom end thereof is provided with a notch. The opening surface of the notch is flush with the top surface inside the movable slot 5733, and a set of limit rods 57345 are fixedly connected inside the notch.

[0060] Specifically, there are no less than two groups of the auxiliary mechanisms 5734, which can jointly share the dynamic load inside the movable slot 5733, effectively improve the load balance and impact resistance of the movable slot 5733, and the sleeves 57342 can be embedded inside the grooves 57341 to achieve a hidden integrated design, reduce the occupation of external space, and ensure the tightness between the components inside the movable slot 5733.

[0061] Refer to Figure 7 , the four ends of the top surface of the bottom plate 574 are all hinged to the output ends of the four sets of electric push rods 5732. A convex plate 5741 is fixed at the middle top end of the bottom plate 574. The convex plate 5741 can extend into the movable slot 5733, and the top surface of the convex plate 5741 and the top surface inside the movable slot 5733 are both arc-shaped, which can reduce the unnecessary friction between the convex plate 5741 and the movable slot 5733. A limit slot 5742 corresponding to the limit rod 57345 is provided at the top end of the convex plate 5741. The limit rod 57345 penetrates through the limit slot 5742 and is fixedly connected inside the notch. The top end of the convex plate 5741 can move inside the notch. The bottom end of the rolling wheel 57344 can contact the top surface of the convex plate 5741. The slight vibration is absorbed by the rolling wheel 57344, the impact transmission is reduced, jamming is avoided, and the stability of the movement is ensured.

[0062] Specifically, the bottom plate 574 can be adjusted in the left - right angle under the output of four groups of electric push rods 5732. Moreover, the convex plate 5741 can be snapped into the movable groove 5733, and the limit rod 57345 passes through the limit groove 5742, which can limit the movement path of the convex plate 5741 to ensure the smoothness of the rotation of the bottom plate 574.

[0063] The present invention provides a hydraulic press with a movable upper workbench. Through the upper balance cylinder 7 arranged at the top of the upper platform 6, the output ends of the upper balance cylinder 7 all pass through the upper platform 6 and are connected to the upper workbench 5. When the motor reducer 56 drives the upper workbench 5 to move up and down, basically, the self - weight of the upper workbench 5 does not need to be considered, and only the influence of the friction of the moving pair needs to be considered. The power of the motor reducer 56 can be reduced, and the production and manufacturing cost can be lowered. Through the upper balance cylinder 7 arranged at the top of the upper platform 6, the output ends of the upper balance cylinder 7 all pass through the upper platform 6 and are connected to the upper workbench 5, balancing the weight of the upper workbench 5 during its up - and - down movement, reducing the power of the motor reducer 56. The method of balance counterweight is simple and clear, the manufacturing is simple, and the application prospect is wide. Through the adjusting mechanism 57 arranged at the middle bottom end of the upper workbench 5, the adjusting mechanism 57 includes components such as a cavity 571, a telescopic mechanism 572, a rotating mechanism 573, and a bottom plate 574. The telescopic mechanism 572 can push the rotating mechanism 573 and the bottom plate 574 downward, and then the rotating mechanism 573 rotates the bottom plate 574, thereby changing and adjusting the bottom surface angle of the upper workbench 5, which is convenient for the processing of special workpieces.

[0064] The above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydraulic press with a movable upper workbench, characterized in that: It includes a lower beam (1). At the four ends of the top surface of the lower beam (1), a set of columns (2) are provided. At the upper and lower ends of the four sets of columns (2), fastening nuts (21) are connected, and the lower ends all penetrate and extend to the bottom end of the lower beam (1). The top end of the lower beam (1) is connected to a set of sliders (3) through a main cylinder (4). At the top end of the slider (3), a set of moving platforms (31) are provided. At the position near the top end of the four sets of columns (2), a set of upper workbenches (5) are connected. At the top end of the upper workbench (5), a set of upper platforms (6) are connected. In the middle of the top surface of the upper platform (6), two upper balance cylinders (7) are provided. The output ends of the two upper balance cylinders (7) all penetrate the upper platform (6) and are connected to the top surface of the upper workbench (5).

2. The hydraulic press with a movable upper workbench according to claim 1, characterized in that, At the middle of the top surface of the upper workbench (5), three bevel gear boxes (51) are equidistantly arranged. Between two adjacent bevel gear boxes (51), they are connected through a first transmission rod (52). At the front and rear ends of the first transmission rod (52), couplings (53) are provided. At the left and right ends of the front and rear two bevel gear boxes (51), they are respectively connected to two worm gear boxes (55) through second transmission rods (54). The four worm gear boxes (55) are respectively connected to the outer top ends of the four sets of columns (2). And at both ends of the second transmission rod (54), couplings (53) are provided. The right end of the middle bevel gear box (51) is connected to the driving end of a motor reducer (56) through a coupling (53). At the middle of the bottom of the upper workbench (5), an adjusting mechanism (57) is provided.

3. The hydraulic press with a movable upper workbench according to claim 2, wherein The adjusting mechanism (57) includes a cavity (571), a telescopic mechanism (572), a rotating mechanism (573) and a bottom plate (574). At the middle of the bottom of the upper workbench (5), a cavity (571) is opened. At the inner top end of the cavity (571), a telescopic mechanism (572) is connected. At the bottom end of the telescopic mechanism (572), a rotating mechanism (573) is connected. At the bottom end of the rotating mechanism (573), a bottom plate (574) is connected.

4. A hydraulic press with a movable upper workbench according to claim 3, characterized in that The telescopic mechanism (572) includes a rotating rod (5721), a transmission belt (5722), a driving motor (5723), external threads (5724), a first moving block (5725), a connecting arm (5726), a second moving block (5727), a telescopic arm (5728) and a connecting bracket (5729). A set of rotating rods (5721) are provided at the top ends of the left and right surfaces inside the cavity (571). The middle ends of the rotating rods (5721) are connected to the drive shafts of a set of driving motors (5723) through the transmission belt (5722). External threads (5724) are provided at the left and right ends of the rotating rod (5721). A set of first moving blocks (5725) are provided at the left and right ends of the left and right groups of the external threads (5724). A set of connecting arms (5726) are respectively connected to the front and rear surfaces of adjacent two groups of the first moving blocks (5725). The other ends of the two groups of connecting arms (5726) are respectively connected to the front and rear surfaces of the second moving block (5727). And a set of telescopic arms (5728) are connected to the top end of the second moving block (5727). A set of connecting brackets (5729) are provided at the top end of the telescopic arm (5728).

5. A hydraulic press with a movable upper workbench according to claim 4, characterized in that, The rotating mechanism (573) includes a fixed seat (5731), an electric push rod (5732), a movable groove (5733) and an auxiliary mechanism (5734). The left and right ends of the top surface of the fixed seat (5731) are respectively connected to the bottom surfaces of two groups of second moving blocks (5727). A set of electric push rods (5732) are provided at the four inner ends of the fixed seat (5731). The output ends of the four groups of electric push rods (5732) all penetrate and extend to the bottom end of the fixed seat (5731) and are connected to the bottom plate (574). A set of movable grooves (5733) are opened at the middle bottom end of the fixed seat (5731). No less than two groups of auxiliary mechanisms (5734) are provided at the top end inside the movable groove (5733).

6. A hydraulic press with a movable upper workbench according to claim 5, characterized in that, The components of the auxiliary mechanism (5734) are all the same. The auxiliary mechanism (5734) includes a groove (57341), a sleeve (57342), a fixed shaft (57343), a rolling wheel (57344) and a limiting rod (57345). No less than two groups of grooves (57341) are opened at the top end inside the movable groove (5733). A set of sleeves (57342) are provided inside the grooves (57341). A set of rolling wheels (57344) are connected to the middle ends inside the sleeves (57342) through the fixed shafts (57343). The front and rear ends of the fixed shaft (57343) all penetrate the sleeve (57342) and extend into the groove (57341) and are connected to the front and rear surfaces inside the groove (57341). A set of limiting rods (57345) are connected to the middle bottom ends of the sleeves (57342).

7. A hydraulic press with a movable upper workbench according to claim 6, characterized in that, The top ends of the four sides of the bottom plate (574) are respectively hinged to the output ends of the four groups of electric push rods (5732). A convex plate (5741) is provided at the middle top end of the bottom plate (574). A limiting groove (5742) corresponding to the limiting rod (57345) is provided at the top end of the convex plate (5741).

8. A hydraulic press with a movable upper workbench according to claim 7, characterized in that, The bottom end of the sleeve (57342) is provided with a notch, and the limiting rod (57345) passes through the limiting groove (5742) and is connected to the notch.

9. The hydraulic press with a movable upper workbench according to claim 7, wherein The top surface of the convex plate (5741) and the inner top surface of the movable groove (5733) are both arc-shaped, and the bottom end of the rolling wheel (57344) can contact the top surface of the convex plate (5741).

10. A hydraulic press with a movable upper workbench according to claim 4, characterized in that, The left and right end components of the rotating rod (5721) are the same, and the two sets of external threads (5724) are both divided into left and right parts, and the directions of the external threads (5724) in the left and right parts are opposite.

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