Locking mechanism for locking nut of mechanical press
By pre-tightening the lock nut in a mechanical press, the problem of loosening of the lock nut due to impact load is solved, and the structural stability and operating reliability of the equipment are improved.
Patent Information
- Application Number
- CN202411413550.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-02-18
AI Technical Summary
The locking nuts of large-tonnage mechanical presses are prone to loosening due to impact loads during the use of the air cushion, resulting in unstable structure.
The lock nut is pre-tightened by pre-tightening tooling, and the pre-tightening force is generated to prevent the nut from loosening by the combination of the piston rod, pre-tightening bolt, pre-tightening piston and pre-tightening lever.
It effectively prevents the loosening of the lock nut, improves the structural stability of the mechanical press, and ensures the normal operation of the equipment under harsh working conditions.
Smart Images
Figure CN119459013A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a mechanical press, in particular to a locking nut anti-loosening mechanism for the mechanical press. Background Art
[0002] Some large-tonnage mechanical presses are equipped with air cushions. During the use of the air cushions, the cylinder inside the press will be subjected to a strong impact load every time the press is pressed. This harsh working condition makes the locking nut easy to loosen, so a cylinder structure that can effectively prevent loosening is needed. Summary of the invention
[0003] The object of the present invention is to provide a locking nut anti-loosening mechanism for a mechanical press to solve the problems in the prior art.
[0004] The technical solution of the present invention is: a mechanical press locking nut anti-loosening mechanism, the anti-loosening structure includes a cylinder and a pre-tightening tooling, The cylinder comprises a piston rod, a locking nut, a support block, a limiting spacer, a pressure plate, a tension bolt, a nut, an upper cylinder cover, a self-lubricating copper sleeve, a piston, an upper cylinder body, a spacer, a middle cylinder cover, a copper sleeve, a middle cylinder body, a lower cylinder body, and a lower cylinder bottom; The pre-tightening tooling includes a pre-tightening bolt, a pre-tightening piston, a pre-tightening cylinder body, a pre-tightening cylinder seat, a pre-tightening lever, and an air cushion crown fixing plate; One end of the pre-tightening bolt is connected to the piston rod, the pre-tightening cylinder seat is arranged on the air cushion crown fixing plate, the pre-tightening cylinder body is arranged on the pre-tightening cylinder seat, the pre-tightening piston is connected to the other end of the pre-tightening bolt and is arranged in the pre-tightening cylinder body, the piston rod passes through the locking nut and the air cushion crown fixing plate in sequence, the locking nut is arranged on the air cushion crown fixing plate, one end of the pre-tightening lever is arranged in the locking nut, and the spacer is arranged outside the piston rod.
[0005] The beneficial effects of the present invention are: the locking nut is pre-tightened by the pre-tightening tool, is not easy to loosen, and has good structural stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 It is a structural schematic diagram of the present invention.
[0007] In the figure, 01 is the piston rod, 02 is the locking nut, 03 is the support block, 04 is the limiting spacer, 05 is the pressure plate, 06 is the tensioning bolt, 07 is the nut, 08 is the upper cylinder cover, 09 is the self-lubricating copper sleeve, 10 is the piston, 11 is the upper cylinder body, 12 is the spacer, 13 is the middle cylinder cover, 14 is the copper sleeve, 15 is the middle cylinder body, 16 is the lower cylinder body, 17 is the lower cylinder bottom, 18 is the pre-tightening bolt, 19 is the pre-tightening piston, 20 is the pre-tightening cylinder body, 21 is the pre-tightening cylinder seat, 22 is the pre-tightening lever, and 23 is the air cushion crown fixing plate. DETAILED DESCRIPTION
[0008] A mechanical press locking nut anti-loosening mechanism, the anti-loosening structure comprises a cylinder and a pre-tightening tooling, The cylinder comprises a piston rod 01, a locking nut 02, a support block 03, a limiting spacer 04, a pressure plate 05, a tension bolt 06, a nut 07, an upper cylinder cover 08, a self-lubricating copper sleeve 09, a piston 10, an upper cylinder body 11, a spacer 12, a middle cylinder cover 13, a copper sleeve 14, a middle cylinder body 15, a lower cylinder body 16, and a lower cylinder bottom 17; The pre-tightening tooling includes a pre-tightening bolt 18, a pre-tightening piston 19, a pre-tightening cylinder 20, a pre-tightening cylinder seat 21, a pre-tightening lever 22, and an air cushion crown fixing plate 23; One end of the pre-tightening bolt 18 is connected to the piston rod 01, the pre-tightening cylinder seat 21 is arranged on the air cushion crown fixing plate 23, the pre-tightening cylinder body 20 is arranged on the pre-tightening cylinder seat 21, the pre-tightening piston 19 is connected to the other end of the pre-tightening bolt 18 and is arranged in the pre-tightening cylinder body 20, the piston rod 01 passes through the locking nut 02 and the air cushion crown fixing plate 23 in sequence, the locking nut 02 is arranged on the air cushion crown fixing plate 23, one end of the pre-tightening lever 22 is arranged in the locking nut 02, and the spacer sleeve 12 is arranged outside the piston rod 01.
[0009] The working principle of the present invention is as follows: first, the cylinder is installed into the air cushion crown, and the locking nut 02 is used for preliminary tightening, then one end of the pre-tightening bolt 18 is screwed into the piston rod 01, and then the pre-tightening cylinder seat 21 and the pre-tightening cylinder body 20 are placed on the air cushion crown fixing plate 23 in sequence, and then the pre-tightening piston 19 is connected to the other end of the pre-tightening bolt 18 and installed into the pre-tightening cylinder body, and finally high-pressure oil is injected into the pre-tightening cylinder body 20, and the movement of the pre-tightening piston 19 causes the piston rod 01 to be stretched and the spacer 12 to be compressed, so that the locking nut 02 and the air cushion A gap is generated between the top crown fixing plate 23. At this time, the locking nut 02 is rotated by the pre-tightening lever 22 to eliminate the gap. After the locking nut 02 is rotated into place, the oil pressure is released. At this time, the piston rod 01 is still in an extended state, and the spacer sleeve 12 is still in a compressed state. The elastic deformation of the two generates a pre-tightening force, which makes the nut not easy to loosen. Finally, in order to prevent the pre-tightening force from disappearing with the passage of time, two M10 saddle screws are installed at a 90° offset between the thread gap of the locking nut 02 and the piston rod 01 for secondary anti-loosening protection.
[0010] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0011] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0012] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.
[0013] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A locking nut anti-loosening mechanism for a mechanical press, characterized in that: The anti-loosening structure includes a cylinder and a pre-tightening tool. The cylinder comprises a piston rod (01), a locking nut (02), a support block (03), a limiting spacer (04), a pressure plate (05), a tension bolt (06), a nut (07), an upper cylinder cover (08), a self-lubricating copper sleeve (09), a piston (10), an upper cylinder body (11), a spacer (12), a middle cylinder cover (13), a copper sleeve (14), a middle cylinder body (15), a lower cylinder body (16), and a lower cylinder bottom (17); The pre-tightening tooling comprises a pre-tightening bolt (18), a pre-tightening piston (19), a pre-tightening cylinder body (20), a pre-tightening cylinder seat (21), a pre-tightening lever (22), and an air cushion crown fixing plate (23); One end of the pre-tightening bolt (18) is connected to the piston rod (01), the pre-tightening cylinder seat (21) is arranged on the air cushion crown fixing plate (23), the pre-tightening cylinder body (20) is arranged on the pre-tightening cylinder seat (21), the pre-tightening piston (19) is connected to the other end of the pre-tightening bolt (18) and is arranged in the pre-tightening cylinder body (20), the piston rod (01) passes through the locking nut (02) and the air cushion crown fixing plate (23) in sequence, the locking nut (02) is arranged on the air cushion crown fixing plate (23), one end of the pre-tightening lever (22) is arranged in the locking nut (02), and the spacer (12) is arranged outside the piston rod (01).
2. A locking nut anti-loosening mechanism for a mechanical press according to claim 1, characterized in that: Install two M10 saddle screws at a 90° angle between the thread gaps of the lock nut (02) and the piston rod (01).