Heightened servo hydraulic stretcher

Abstract

The utility model discloses a heightened servo hydraulic stretcher which comprises a rack, a workbench, an upper die, a lower die, an upper die driving mechanism and a lower die driving mechanism, the upper die driving mechanism comprises an upper supporting frame, an upper movable plate and a hydraulic cylinder. The lower die driving mechanism comprises a lower supporting frame, a lower movable plate and a servo electric cylinder. The servo electric cylinder comprises a servo motor, a piston rod and a lead screw transmission mechanism. The servo electric cylinder further comprises a supporting mechanism, the supporting mechanism is installed on the workbench and located over the lead screw, and the supporting mechanism comprises an installation base and a supporting base. The upper end of the supporting base is installed on the installation base, the lower end of the supporting base abuts against the end, away from the servo motor, of the lead screw, and a through hole is formed in the bottom of the supporting base. According to the heightened type servo hydraulic stretcher, the damage degree of the lead screw structure in the servo electric cylinder during unbalance loading can be reduced, and therefore the service life of the heightened type servo hydraulic stretcher can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of hydraulic forming, and in particular relates to a heightened servo hydraulic stretching machine. Background Art

[0002] In the hydraulic forming industry, hydraulic stretching machines work by utilizing the action of liquid in the hydraulic system. For thin sheet forming products, hydraulic stretching has the advantages of convenient processing and easy forming of special shaped parts. Therefore, many thin sheet forming products currently use hydraulic stretching to complete their processing. For example, the invention patent application with application publication number CN106513484A discloses a "stretching machine for filter housing", which has the advantages of high production efficiency, can complete two stretching processes of the filter housing at one time, and is safe and convenient to use.

[0003] In the above process, in addition to being driven by a hydraulic cylinder, the stretching power in the hydraulic stretching machine can also be driven by a servo electric cylinder, such as the "electric cylinder" disclosed in the invention patent application with application publication number CN107733147A, the "a large thrust electric cylinder" disclosed in the invention patent application with application publication number CN117277677A, and the "a servo electric cylinder" disclosed in the utility model patent with authorization announcement number CN218850545U; however, when the above-mentioned electric cylinder is installed, one end of the internal screw is connected to the servo motor, which drives the screw to rotate, thereby driving the screw nut and the cylinder barrel to make a linear motion, thereby driving the corresponding mold to move; however, in the above process, since the other end of the screw is in a suspended state, it is easy to cause the screw to deform under the action of the offset load, thereby causing the structure of the servo electric cylinder to be damaged. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a heightened servo hydraulic stretching machine, which can reduce the degree of damage to the screw rod structure in the servo electric cylinder when the load is unbalanced, thereby helping to extend the service life of the heightened servo hydraulic stretching machine of the utility model.

[0005] The technical solution of the utility model to solve the above technical problems is:

[0006] A heightened servo hydraulic stretching machine comprises a frame, a workbench arranged on the frame, an upper die, a lower die, an upper die driving mechanism for driving the upper die to move vertically, and a lower die driving mechanism for driving the lower die to move vertically, wherein:

[0007] The upper die driving mechanism includes an upper support frame arranged on the machine frame, an upper movable plate arranged in the upper support frame, and a hydraulic cylinder for driving the lifting of the upper movable plate; wherein, the upper die is installed on the upper movable plate; the hydraulic rod of the hydraulic cylinder is connected to the upper movable plate;

[0008] The lower die driving mechanism includes a lower support frame arranged on the machine frame, a lower movable plate arranged in the lower support frame, and a servo electric cylinder for driving the lifting movement of the lower movable plate; wherein, the lower die is installed on the lower movable plate; the servo electric cylinder includes a servo motor, a piston rod, and a screw rod transmission mechanism for driving the lifting movement of the piston rod, wherein, the servo motor is installed on the lower support frame, and the main shaft of the servo motor is connected to the screw rod in the screw rod transmission mechanism; the screw nut in the screw rod transmission mechanism is connected to the piston rod; the end of the piston rod far from the servo motor is connected to the lower movable plate;

[0009] The servo electric cylinder further includes a support mechanism for supporting the end of the screw rod far from the servo motor, the support mechanism is installed on the workbench and is located directly above the screw rod, the support mechanism includes a mounting seat arranged at the bottom of the workbench and a support seat arranged on the mounting seat, wherein, the upper end of the support seat is installed on the mounting seat, and the lower end abuts against the end of the screw rod far from the servo motor, and a through hole for cooperating with the end of the screw rod is arranged at the bottom of the support seat.

[0010] Preferably, a flange is arranged on the piston rod, and the lower movable plate is installed on the flange; avoidance holes for avoiding the support seat are arranged on the lower movable plate, the piston rod, and the flange.

[0011] Preferably, the support seat is installed on the mounting seat through a screw, and a threaded hole for cooperating with the screw is arranged on the mounting seat.

[0012] Preferably, a support is arranged at the end of the screw rod far from the servo motor, and the end of the screw rod is installed on the support through a rotating bearing; the support seat abuts against the support.

[0013] Preferably, a cushion block is arranged between the support and the support seat; the support seat abuts against the cushion block.

[0014] Preferably, both the upper die driving mechanism and the lower die driving mechanism further include a guiding mechanism for guiding the lifting movement of the lower movable plate; the guiding mechanism includes a vertically arranged guide rod and a guide sleeve arranged on the guide rod, wherein, the guide sleeve is installed on the upper movable plate and the lower movable plate.

[0015] Preferably, there are four groups of guiding mechanisms, and the four groups of guiding mechanisms are located at the four diagonals of the upper movable plate and the lower movable plate.

[0016] Preferably, the workbench is installed on the frame; the lower end of the guiding rod located on the upper side of the workbench is installed on the workbench, and the upper end is connected to the upper support frame; the upper end of the guiding rod located on the lower side of the workbench is installed on the workbench, and the lower end is connected to the lower support frame.

[0017] Preferably, stroke detection plates are provided on both the upper movable plate and the lower movable plate; detection sensors are provided at positions corresponding to the stroke detection plates in the upper movable plate on the upper support frame and at positions corresponding to the stroke detection plates in the lower movable plate on the lower support frame.

[0018] Preferably, the cross-section of the support seat is polygonal.

[0019] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0020] The height-increased servo hydraulic stretching machine of the present utility model uses a servo electric cylinder to drive the lower movable plate. By supporting and positioning the other end of the lead screw in the servo electric cylinder, it is possible to reduce the occurrence of a situation where the structure of the lead screw is damaged (such as bending deformation) due to eccentric loading on the lower movable plate, thereby being beneficial to extending the service life of the height-increased servo hydraulic stretching machine of the present utility model. Description of the Drawings

[0021] Figures 1-3 are three perspective three-dimensional schematic diagrams of the height-increased servo hydraulic stretching machine of the present utility model.

[0022] Figure 4 and Figure 5 are two perspective three-dimensional schematic diagrams of the upper die driving mechanism and the lower die driving mechanism.

[0023] Figure 6 is Figure 4 a partial enlarged view of A in

[0024] Figure 7 is a cross-sectional view of the support mechanism. Detailed Description of the Embodiment

[0025] The present utility model will be further described in detail below in conjunction with the embodiments and the drawings, but the embodiments of the present utility model are not limited thereto.

[0026] See Figures 1-7, the height-increased servo-hydraulic drawing press of the present utility model includes a frame 1, a workbench arranged on the frame 1, an upper die, a lower die, an upper die driving mechanism 3 for driving the upper die to move vertically, and a lower die driving mechanism 5 for driving the lower die to move vertically. Among them,

[0027] The upper die driving mechanism 3 includes an upper support frame arranged on the frame 1, a movable plate 2 (i.e., the upper movable plate) arranged in the upper support frame, and a hydraulic cylinder for driving the lifting of the upper movable plate; among them, the upper die is installed on the upper movable plate; the hydraulic rod of the hydraulic cylinder is connected to the upper movable plate; in this embodiment, the specific pipeline structure driven by the hydraulic cylinder can refer to the specific hydraulic driving pipeline in the "drawing press for filter housing" disclosed in the patent application with the application publication number CN106513484A previously applied by the applicant;

[0028] The lower die driving mechanism 5 includes a lower support frame arranged on the frame 1, a movable plate 2 (i.e., the lower movable plate) arranged in the lower support frame, and a servo electric cylinder for driving the lifting movement of the lower movable plate; among them, the servo electric cylinder includes a servo motor 14, a piston rod 11, and a screw rod transmission mechanism for driving the lifting movement of the piston rod 11. Among them, the servo motor 14 is installed on the lower support frame, and the main shaft of the servo motor 14 is connected to the screw rod 10 in the screw rod transmission mechanism; the screw nut in the screw rod transmission mechanism is connected to the piston rod 11; the end of the piston rod 11 far from the servo motor 14 is connected to the lower movable plate;

[0029] The servo electric cylinder further includes a support mechanism for supporting the end of the screw rod 10 far from the servo motor 14. The support mechanism is installed on the workbench and is located directly above the screw rod 10. The support mechanism includes a mounting seat 7 and a support seat 9 arranged on the mounting seat 7. Among them, the mounting seat 7 is installed at the bottom of the workbench; the upper end of the support seat 9 is installed on the mounting seat 7, and the lower end abuts against the end of the screw rod 10 far from the servo motor 14. A through hole matching the end of the screw rod 10 is arranged at the bottom of the support seat 9.

[0030] See Figures 1-7 , a flange plate 13 is arranged on the piston rod 11, and the lower movable plate is installed on the flange plate 13; avoidance holes for avoiding the support seat 9 are arranged on the lower movable plate, the piston rod 11, and the flange plate 13, so that the piston rod 11 will not interfere with the support seat 9 when driving the lower movable plate to move.

[0031] See Figures 1-7, the support base 9 is installed on the mounting base 7 through a screw rod 8, and threaded holes matching the screw rod 8 are provided on the mounting base 7; through the above arrangement, the support base 9 can be rotated to drive the screw rod 8 to rotate in the threaded holes of the mounting base 7, thereby adjusting the height position of the support base 9, so as to adjust the pressing force of the bottom of the support base 9 on the end of the lead screw 10.

[0032] In this embodiment, the cross-section of the support base 9 is polygonal; this can facilitate the operator to rotate the support base 9 to adjust the height of the support base 9.

[0033] See Figures 1-7 , a support 15 is provided at the end of the lead screw 10 away from the servo motor 14, and the end of the lead screw 10 is installed on the support 15 through a rotating bearing; a spacer 12 is provided between the support 15 and the support base 9; the support base 9 abuts against the spacer 12; by transferring the support position to the support 15, it is possible to support the lead screw 10 without interfering with the rotation of the lead screw 10.

[0034] See Figures 1-7 , the upper die driving mechanism 3 and the lower die driving mechanism 5 further include a guiding mechanism 6 for guiding the lifting movement of the upper movable plate and the lower movable plate; wherein, there are four groups of the guiding mechanism 6, and the four groups of guiding mechanism 6 are located at the four diagonals of the upper movable plate and the lower movable plate; each group of guiding mechanism 6 includes a vertically arranged guide rod and a guide sleeve arranged on the guide rod, wherein, the guide sleeve is installed on the upper movable plate and the lower movable plate. By providing the above four groups of guiding mechanism 6, it is possible to guide and limit the lifting movement of the upper movable plate and the lower movable plate, and at the same time, it can also further prevent the structure of the lead screw 10 from being damaged due to eccentric loading.

[0035] In this embodiment, the workbench is installed on the frame 1; the lower end of the guide rod located above the workbench is installed on the workbench, and the upper end is connected to the upper support frame; the upper end of the guide rod located below the workbench is installed on the workbench, and the lower end is connected to the lower support frame.

[0036] See Figures 1-7, a stroke detection mechanism 4 is respectively arranged between the upper movable plate and the upper support frame, and between the lower movable plate and the lower support frame. The stroke detection mechanism 4 includes stroke detection plates arranged on the upper movable plate and the lower movable plate; detection sensors are arranged at corresponding positions of the upper support frame and the stroke detection plate in the upper movable plate, and at corresponding positions of the lower support frame and the stroke detection plate in the lower movable plate; the movement position of the upper movable plate or the lower movable plate can be monitored and controlled through the detection sensors.

[0037] In this embodiment, the installation structure of the stroke detection plate and the detection sensor can be implemented with reference to the corresponding structure in the "tensile machine for filter housing" disclosed in the patent application with the application publication number of CN106513484A previously applied by the applicant.

[0038] The above is a preferred embodiment of the present invention, but the embodiments of the present invention are not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A heightened servo-hydraulic stretching machine, characterized in that, It includes a frame, a workbench arranged on the frame, an upper die, a lower die, an upper die driving mechanism for driving the upper die to move vertically, and a lower die driving mechanism for driving the lower die to move vertically. Among them, the upper die driving mechanism includes an upper support frame arranged on the frame, an upper movable plate arranged in the upper support frame, and a hydraulic cylinder for driving the upper movable plate to lift and lower; among them, the upper die is installed on the upper movable plate; the hydraulic rod of the hydraulic cylinder is connected to the upper movable plate; the lower die driving mechanism includes a lower support frame arranged on the frame, a lower movable plate arranged in the lower support frame, and a servo electric cylinder for driving the lower movable plate to move up and down; among them, the lower die is installed on the lower movable plate; the servo electric cylinder includes a servo motor, a piston rod, and a screw rod transmission mechanism for driving the piston rod to move up and down. Among them, the servo motor is installed on the lower support frame, and the main shaft of the servo motor is connected to the screw rod in the screw rod transmission mechanism; the screw nut in the screw rod transmission mechanism is connected to the piston rod; the end of the piston rod far from the servo motor is connected to the lower movable plate; the servo electric cylinder further includes a support mechanism for supporting the end of the screw rod far from the servo motor. The support mechanism is installed on the workbench and is located directly above the screw rod. The support mechanism includes a mounting seat arranged at the bottom of the workbench and a support seat arranged on the mounting seat. Among them, the upper end of the support seat is installed on the mounting seat, and the lower end abuts against the end of the screw rod far from the servo motor. A through hole matching the end of the screw rod is arranged at the bottom of the support seat.

2. The height-increased servo hydraulic stretching machine according to claim 1, wherein, A flange is arranged on the piston rod, and the lower movable plate is installed on the flange; avoidance holes for avoiding the support seat are arranged on the lower movable plate, the piston rod, and the flange.

3. The height-increased servo hydraulic stretching machine according to claim 1, wherein The support seat is installed on the mounting seat through a screw, and a threaded hole matching the screw is arranged on the mounting seat.

4. The heightened servo-hydraulic stretching machine according to claim 1, wherein A support is arranged at the end of the screw rod far from the servo motor, and the end of the screw rod is installed on the support through a rotating bearing; the support seat abuts against the support.

5. The height-increased servo hydraulic stretching machine according to claim 4, wherein, A cushion block is arranged between the support and the support seat; the support seat abuts against the cushion block.

6. The height-increased servo hydraulic stretching machine according to claim 1, characterized in that, Both the upper die driving mechanism and the lower die driving mechanism further include a guiding mechanism for guiding the lifting movement of the lower movable plate; the guiding mechanism includes a vertically arranged guide rod and a guide sleeve arranged on the guide rod. Among them, the guide sleeve is installed on the upper movable plate and the lower movable plate.

7. The height-increased servo hydraulic stretching machine according to claim 6, characterized in that, There are four groups of guiding mechanisms, and the four groups of guiding mechanisms are located at the four diagonals of the upper movable plate and the lower movable plate.

8. The height-increased servo hydraulic stretching machine according to claim 7, characterized in that The workbench is installed on the frame; the lower end of the guide rod on the upper side of the workbench is installed on the workbench, and the upper end is connected to the upper support frame; the upper end of the guide rod on the lower side of the workbench is installed on the workbench, and the lower end is connected to the lower support frame.

9. The height-increased servo hydraulic stretching machine according to claim 1, wherein, Stroke detection plates are provided on both the upper movable plate and the lower movable plate; detection sensors are provided at positions corresponding to the stroke detection plates in the upper movable plate on the upper support frame and at positions corresponding to the stroke detection plates in the lower movable plate on the lower support frame.

10. The height-increased servo hydraulic stretching machine according to claim 1, wherein, The cross-section of the support base is polygonal.

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