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CN-122007881-A - Lower nut mounting device and lower nut mounting method for press

CN122007881ACN 122007881 ACN122007881 ACN 122007881ACN-122007881-A

Abstract

The invention provides a lower nut mounting device of a press machine and a lower nut mounting method of the press machine, which relate to the field of nut mounting, and the adopted scheme comprises a movable bottom plate and an energy storage screw rod, wherein the energy storage screw rod is rotationally arranged on the movable bottom plate, and the energy storage screw rod adopts a ball screw; the device comprises an energy storage screw, a screw nut, a driving assembly and a driving assembly, wherein the screw nut is arranged on the energy storage screw, the screw nut is in sliding connection with the support frame, the screw nut can lift on the support frame, a coil spring is sleeved on the energy storage screw, two ends of the coil spring are respectively connected with the energy storage screw and the support frame, the energy storage screw can store energy by the coil spring when rotating, the energy storage screw can drive the energy storage screw to reversely rotate when releasing energy, the driving assembly is arranged on the support frame, and two power ends of the driving assembly are respectively connected with a bearing disc and the energy storage screw. The invention can provide power and support for screwing the nut, reduce the labor intensity of operators and improve the installation efficiency and the installation quality.

Inventors

  • WANG ZHIHUI
  • WANG YIBO
  • CHEN CHAO
  • ZHANG JIALONG
  • CAO YANKE

Assignees

  • 济南二机床集团有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. The utility model provides a nut installation device under press, includes movable bottom plate (1), still be provided with the support frame on movable bottom plate (1), its characterized in that still includes: The energy storage screw (3) is rotationally arranged on the movable bottom plate (1), and the energy storage screw (3) adopts a ball screw; The screw nut (6) is arranged on the energy storage screw (3), the screw nut (6) is connected with the support frame in a sliding way, and the screw nut (6) can lift on the support frame; The coil spring (4) is sleeved on the energy storage screw rod (3), two ends of the coil spring (4) are respectively connected with the energy storage screw rod (3) and the supporting frame, the energy storage screw rod (3) can store energy when rotating, and the coil spring (4) can drive the energy storage screw rod (3) to reversely rotate when releasing energy; The bearing disc (7), the bearing disc (7) is rotatably arranged on the screw nut (6), and the bearing disc (7) is used for driving the nut (15) to be installed to rotate and lift; The transmission assembly is arranged on the supporting frame, two power ends of the transmission assembly are respectively connected with the bearing disc (7) and the energy storage screw rod (3), the bearing disc (7) can drive the energy storage screw rod (3) to rotate through the transmission assembly, and the energy storage screw rod (3) can drive the bearing disc (7) to reversely rotate through the transmission assembly.
  2. 2. The lower nut mounting device of the press machine according to claim 1, characterized in that the transmission assembly comprises an upper gear (701), the upper gear (701) is sleeved on the outer ring of the bearing disc (7), the upper gear (701) is meshed with a first gear (12), a transmission sleeve (18) is coaxially arranged at the lower part of the first gear (12), the first gear (12) can be lapped on the upper gear (701), the transmission sleeve (18) can be arranged on the support frame in a lifting and rotating manner, an intermediate shaft (11) is connected with an internal spline of the transmission sleeve (18), the intermediate shaft (11) is vertically and rotationally arranged on the movable bottom plate (1), a second gear (17) is arranged on the intermediate shaft (11), the second gear (17) is meshed with a lower gear (301), the lower gear (301) is sleeved on the energy storage screw (3), and the lower gear (301) can drive the energy storage screw (3) to rotate.
  3. 3. The press lower nut mounting device according to claim 2, characterized in that the transmission ratio of the upper gear (701) and the lower gear (301) is the same as the transmission ratio between the first gear (12) and the second gear (17), and the lead of the energy storage screw (3) is the same as the lead of the nut (15) to be mounted.
  4. 4. A press lower nut mounting device as claimed in claim 3, characterized in that the upper gear (701) and the bearing disc (7) are of an integrated structure, at least four clamping seats (702) are arranged on the upper end face of the gear one (12), clamping grooves are formed in the clamping seats (702), a deflector rod (8) is arranged in the clamping grooves in a penetrating manner, and the end part of the deflector rod (8) can extend into the nut (15) to be mounted.
  5. 5. The press lower nut mounting device according to claim 4, further comprising a locking member (9), said locking member (9) being capable of connecting said lower gear (301) with said moving base plate (1).
  6. 6. The lower nut mounting device for a press machine according to claim 5, wherein a plurality of guide plates (601) are arranged on the outer circumference of the screw nut (6), the end parts of the guide plates (601) extend into the supporting frame and can move up and down along the sliding grooves (104) on the supporting frame, a connecting plate (602) is horizontally arranged between two adjacent guide plates (601), a mounting seat (704) is rotatably arranged at the lower part of the bearing plate (7), the mounting seat (704) and the screw nut (6) are coaxially arranged, a mounting groove (703) is formed in the lower surface of the mounting seat (704), the upper ends of the guide plates (601) extend into the corresponding mounting groove (703), gaps exist between the guide plates (601) and the mounting groove (703), an adjusting screw (13) is vertically arranged on the connecting plate (602), the end parts of the adjusting screw (13) can abut against the lower surface of the mounting seat (704), and the adjusting screw (13) can push the mounting seat (704) to move upwards.
  7. 7. The press lower nut mounting device according to claim 6, characterized in that a pressure sensor is provided between the mounting groove (703) and the guide plate (601), the pressure sensor being connected to a display.
  8. 8. The lower nut mounting device of the press machine according to claim 7, characterized in that the lower part of the movable bottom plate (1) is provided with a roller (106), and three leveling screws (14) are vertically arranged on the movable bottom plate (1).
  9. 9. A method for installing a press lower nut as defined in claim 8, comprising the steps of: S01, inserting a deflector rod (8) into a nut (15) to be installed, and then hanging the nut (15) to be installed on the bearing disc (7); S02, unlocking the locking piece (9), rotating the upper gear (701), driving the energy storage screw rod (3) to rotate through the transmission component, enabling the coil spring (4) to elastically deform to store energy until the bearing disc (7) rotates for a set number of turns, and locking the transmission component through the locking piece (9); s03, moving the movable bottom plate (1), rotating the leveling screw (14) to enable the roller (106) to leave the ground, and adjusting the leveling screw (14) to enable nuts (15) to be installed to be centered with corresponding pull rods (16); S04, releasing the locking piece (9), releasing energy by the coil spring (4), driving the bearing plate (7) to rotate by the energy storage screw rod (3) through the transmission assembly, driving the bearing plate (7) to synchronously ascend by the screw rod nut (6), manually controlling the rotating speed of the bearing plate (7) through the deflector rod (8), and ensuring that the bearing plate (7) rotates at a constant speed until the coil spring (4) does not drive the energy storage screw rod (3) to rotate any more; S05, measuring the distance between the lower end face of the nut (15) to be mounted and the lower end face of the pull rod (16), and if the distance does not meet the requirement, manually driving the bearing disc (7) to reversely or in the same direction through the deflector rod (8) until the distance between the lower end face of the nut (15) to be mounted and the lower end face of the pull rod (16) meets the mounting requirement.
  10. 10. The method of installing a press down nut according to claim 9, characterized in that in S04, when the display number exceeds the set threshold range, the transmission assembly is locked by the locking member (9), the adjusting screw (13) is adjusted, and the mount (704) is moved downward until the display number is reduced to the set threshold range.

Description

Lower nut mounting device and lower nut mounting method for press Technical Field The invention relates to the field of nut installation, in particular to a lower nut installation device and a lower nut installation method of a press. Background The press is used as core equipment in equipment manufacturing industry, and the assembly of the tensioning nut and the tensioning bolt is completed in the foundation pit in the final assembly process so as to realize the reliable fastening of the machine body and the base. The working procedure has narrow operation space and dense equipment layout, and has higher requirements on the installation efficiency, the screw thread matching precision and the assembly safety of the tensioning nut. In the prior art, the Chinese patent application with the patent number of CN 222627647U provides a large-scale nut flip-chip device, which comprises a device screw rod, a nut tray, a spring tray and a hexagonal nut, wherein the device screw rod is used for being matched with a large-scale nut to be installed, the nut tray is positioned above the device screw rod and is used for bearing the large-scale nut, the spring is positioned between the nut tray and the spring tray, and when the nut tray contacts with a screw thread section of the nut screw rod, the screw thread can be automatically aligned and centered for leveling through the elastic action of the spring, so that the large-scale nut can be screwed into the nut screw rod quickly and efficiently. The technical scheme solves the problems that the repeated alignment and the initial tooth loading of the large nut are difficult, time and labor are wasted, the operation efficiency is high, and the safety risk is high. However, when the technical scheme is used for installing the lower nut on the base of the press machine in the foundation pit, the lower nut is supported by the spring and still screwed by manpower, so that the problems that on one hand, the weight of the nut is large (generally tens to hundreds of kilograms), the spring is difficult to fully balance the dead weight of the nut along with the deformation recovery of the spring in the screwing process, at the moment, large positive pressure still exists between the nut and the screw thread of the pull rod, the friction force between the screw thread pair is remarkably increased, the screw thread locking (seizure) phenomenon is extremely easy to occur, the screwing is difficult, the screw thread is damaged by light weight and even the workpiece is scrapped, and on the other hand, under the condition that the screw thread friction resistance exists in the heavy nut, operators need to overcome large rotation moment, especially in the limited space of the foundation pit and the like, the operation stroke of the large spanner is limited, the operation difficulty is large, the time consumption is long, and the potential safety hazard of hurting people is caused by slipping. Disclosure of Invention In order to solve the technical problems of low efficiency, easiness in locking and high labor intensity in the installation of the lower nut on the base of the press in the prior art, the invention provides the lower nut installation device of the press and the lower nut installation method of the press, which can provide power and supporting function for screwing the nut, reduce the labor intensity of operators and improve the installation efficiency and the installation quality. The invention provides a lower nut mounting device of a press machine, which comprises a movable bottom plate, an energy storage screw, a screw nut, a coil spring, a bearing disc and a transmission assembly, wherein the movable bottom plate is further provided with a support frame, the energy storage screw is rotationally arranged on the movable bottom plate, the energy storage screw adopts a ball screw, the screw nut is arranged on the energy storage screw, the screw nut is in sliding connection with the support frame and can be lifted on the support frame, the coil spring is sleeved on the energy storage screw, two ends of the coil spring are respectively connected with the energy storage screw and the support frame, when the energy storage screw rotates, the coil spring can drive the energy storage screw to reversely rotate, the bearing disc is rotationally arranged on the screw nut, the bearing disc is used for driving the nut to be mounted to rotate and lift, the transmission assembly is arranged on the support frame, two power ends of the transmission assembly are respectively connected with the bearing disc and the energy storage assembly, and the bearing disc can drive the energy storage screw to reversely rotate through the bearing disc when the energy storage screw rotates. According to the invention, through the synergistic effect of the energy storage screw rod, the coil spring and the transmission component, enough elastic potential energy can be stored before screwing, and torque is cont