A lifting device for stamping die

Abstract

The present invention belongs to the field of lifting tools, and discloses a lifting device for a stamping die, including a U-shaped lifting ring, a screw-screw hole transmission pair, a cylindrical nut and a lifting device; the free end of the screw hole part of the screw-screw hole transmission pair is connected to the U-shaped lifting ring, the free end of the screw part is screwed to one end of the cylindrical nut, the side wall of the cylindrical nut is provided with a window with a detachable buckle, and the lifting device is screwed to the other end of the cylindrical nut. By adding the cylindrical nut, the adjustment of the lifting height, the quick replacement of the lifting device and the easier horizontal lifting of the die are achieved. The whole device not only meets the requirements of lightweight, but also ensures the rigidity in the vertical direction, and is suitable for lifting the die in the automotive industry.

Description

Technical Field

[0001] The invention belongs to the field of lifting tools, and specifically discloses a lifting device for a stamping die. Background Art

[0002] At present, when stamping dies are used in the manufacturing process, parts such as the wedge slider and the pressure plate need to be lifted by a hoist. During the assembly process, the slider and the pressure plate themselves need to be balanced and adjusted. There are several key problems in the application of traditional lifting devices:

[0003] 1. The slider and the pressure plate are limited by the mold structure, and the lifting holes are at different heights. It is very easy for the slider to have an unstable center of gravity during the lifting process. The fitter must find a lifting hook of appropriate length or a suitable pad block to adjust the balance.

[0004] 2. It is tedious and dangerous for fitters to adjust the balance of the slider, and it wastes a lot of time.

[0005] 3. The process of replacing the corresponding hangers for different molds is rather cumbersome and the production efficiency is low. Summary of the invention

[0006] In order to solve the problems in the background technology, the present invention provides a lifting device for a stamping die, and the specific technical solution is as follows:

[0007] A lifting device for a stamping die comprises a U-shaped lifting ring, a screw hole transmission pair, a cylindrical nut with a window on the side wall, and a lifting device with a lifting screw on the top; the screw hole transmission pair comprises a screw hole sleeve and an adjusting screw whose upper end is screwed to the lower end of the screw hole sleeve, the upper end of the screw hole sleeve is connected to the U-shaped lifting ring, the lower end of the adjusting screw is screwed to one end of the cylindrical nut, a detachable buckle is embedded in the window, and the lifting screw is screwed to the other end of the cylindrical nut.

[0008] In the above technical solution, the adjusting screw and the lifting screw are connected into one by a cylindrical nut, which can keep the sling in a vertical state as a whole and avoid crooked lifting. At the same time, since there is a gap at the junction of the two screws (adjusting screw and lifting screw), it is more convenient to adjust the lifting distance than using a long screw. The window opened on the side wall of the cylindrical nut can not only monitor the status of the adjusting screw and the lifting screw, but also make it easier to replace the sling.

[0009] Preferably, it also includes a limit nut and a limit baffle plate arranged on the adjusting screw, the limit nut is located between the screw hole sleeve and the cylindrical nut; the limit baffle plate is located at the lower end of the adjusting screw.

[0010] The setting of the limit baffle can prevent the dangerous situation of the sling slipping along the thread when the lifting weight is large. The setting of the limit nut ensures that the upper part of the lifting screw does not contact the lower part of the adjusting screw, avoiding extrusion and deformation.

[0011] Preferably, the screw hole sleeve includes a linking body with a linking ring at the top and a rotating cylinder sleeved with the linking body, the linking body and the rotating cylinder are coaxially rotatably arranged, the U-shaped hanging ring is connected to the linking ring of the linking body, a threaded hole is provided in the rotating cylinder, and the upper end of the adjusting screw is threadedly connected to the rotating cylinder through the threaded hole in the rotating cylinder.

[0012] When lifting a heavy mold and moving it between different workstations, the mold will not generate continuous torque on the adjusting screw, thus avoiding fatigue cracks on the adjusting screw and facilitating lifting safety.

[0013] Preferably, the adjusting screw and the lifting screw are coaxially arranged.

[0014] During the entire lifting process, the adjusting screw and the lifting screw arranged up and down can be subjected to balanced forces, thereby extending the service life of the lifting device.

[0015] Furthermore, the detachable buckle includes a fixing block with at least one screw hole and a bolt, the fixing block is embedded in the lower part of the window, the bolt is located in the screw hole of the fixing block, and the lifting screw has multiple bolt holes radially opened in the up and down directions for cooperating with the bolt.

[0016] The bolt can be rotated through the screw hole on the fixing block and then enter the bolt hole on the lifting screw rod. The detachable buckle composed of the bolt and the fixing block is easy to disassemble and has high reliability, and is particularly suitable for the lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0018] Figure 2 This is a structural diagram of a connecting sleeve in an embodiment of the present invention;

[0019] In the figure: 1 limit nut; 2 U-shaped lifting ring; 3 sealing pin; 4 screw and screw hole transmission pair; 4.1 screw hole sleeve; 4.1a connecting body; 4.1b rotating cylinder; 4.2 adjusting screw; 5 cylindrical nut; 5.1 window; 6 detachable buckle; 6.1 fixing block; 6.2 bolt; 7 lifting fixture; 7.1 lifting screw; 8 limit baffle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on this embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Refer to the instruction manual Figure 1-2 , first process or purchase a U-shaped lifting ring 2, install a sealing pin 3 for standby use, a lifting screw 7.1 is provided on the lifting device 7, and a plurality of radial bolt holes are opened along the axial direction of the lifting screw 7.1, a whole full-thread screw is prepared as an adjusting screw 4.2, and a columnar reinforcing sleeve with an internal threaded blind hole is processed as a screw hole sleeve 4.1, the screw hole sleeve 4.1 comprises a link body 4.1a with a link ring at the top and a rotary drum 4.1b sleeved with the link body 4.1a, the link body 4.1a and the rotary drum 4.1b are coaxially rotatably arranged, the U-shaped lifting ring 2 is linked to the link ring of the link body 4.1a, a threaded hole is provided in the rotary drum 4.1b, and the upper end of the adjusting screw 4.2 is screwed to the rotary drum 4.1b through the threaded hole in the rotary drum 4.1b.

[0022] The upper end of the adjusting screw 4.2 is screwed into the screw hole sleeve 4.1 to form the screw screw hole transmission pair 4; the limit nut 1 and the cylindrical nut 5 are screwed on the other end of the adjusting screw 4.2 in sequence, and finally the limit stopper 8 is fixed on the lower end of the adjusting screw 4.2 to prevent the dangerous situation of the lifting device slipping along the thread when the lifting weight is large. After determining the screw-in position of the adjusting screw 4.2 according to the height of each batch of workpieces to be lifted, it is positioned by the limit nut 1.

[0023] The core of the cylindrical nut 5 is provided with an axial through thread, and a window is opened on the side wall, in which a detachable buckle 6 is embedded. The buckle includes a fixing block 6.1 with a through screw hole and a bolt 6.2. The hanger 7 with a lifting screw 7.1 on the upper part is screwed into the lower end of the cylindrical nut 5, and then the bolt 6.2 is passed through the through screw hole of the fixing block 6.1 and enters the radial bolt hole on the lifting screw 7.1 to complete the assembly of the lower part of the embodiment of the device.

[0024] The connecting sleeve is connected to the U-shaped lifting ring 2, and the sealing pin 3 is locked, thereby completing the assembly of the lifting device of the stamping die according to the embodiment of the present invention.

[0025] When lifting a large mold, two sets of lifting devices disclosed in the present invention are generally used. The two sets of lifting devices are symmetrically arranged relative to the center of gravity of the mold. The lifting devices are respectively connected to the mold below and the slings above. The length of the slings is adjusted to ensure that the adjusting screws 4.2 in the two sets of lifting devices are in a vertical state. The height of the lifting ring 2 is adjusted by rotating the cylindrical nut 5 and the lifting screw 7.1. Try to lift and observe whether the mold is balanced, and make further adjustments through the cylindrical nut 5 according to the state of the mold.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lifting device for a stamping die, characterized by: The invention comprises a U-shaped lifting ring (2), a screw hole transmission pair (4), a cylindrical nut (5) with a window (5.1) on the side wall, and a lifting device (7) with a lifting screw (7.1) on the upper part; the screw hole transmission pair (4) comprises a screw hole sleeve (4.1) and an adjusting screw (4.2) whose upper end is screwed to the lower end of the screw hole sleeve (4.1); the upper end of the screw hole sleeve (4.1) is connected to the U-shaped lifting ring (2), and the lower end of the adjusting screw (4.2) is screwed to the cylindrical nut (5) with a window (5.1) on the side wall. One end of the cylindrical nut (5) is screwed, a detachable buckle (6) is embedded in the window (5.1), and the lifting screw (7.1) is screwed to the other end of the cylindrical nut (5); it also includes a limit nut (1) and a limit baffle (8) arranged on the adjusting screw (4.2), the limit nut (1) is located between the screw hole sleeve (4.1) and the cylindrical nut (5); the limit baffle (8) is located at the lower end of the adjusting screw (4.2); The screw hole sleeve (4.1) comprises a link body (4.1a) with a link ring at the top and a rotary drum (4.1b) sleeved with the link body (4.1a); the link body (4.1a) and the rotary drum (4.1b) are coaxially rotatable, the U-shaped lifting ring (2) is connected to the link ring of the link body (4.1a), a threaded hole is provided in the rotary drum (4.1b), and the upper end of the adjusting screw (4.2) is threadedly connected to the rotary drum (4.1b) through the threaded hole in the rotary drum (4.1b); the adjusting screw (4.2) and the lifting screw (7.1) are coaxially arranged; The detachable buckle (6) comprises a fixing block (6.1) with at least one screw hole and a bolt (6.2); the fixing block (6.1) is embedded in the lower part of the window (5.1); the bolt (6.2) is located in the screw hole of the fixing block (6.1); and the hanging screw rod (7.1) is radially provided with a plurality of bolt holes for cooperating with the bolt (6.2) in the up-down direction.

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