Downward pressing dead point controllable oil cylinder for bending machine
By designing worm gear box and servo motor-driven worms in the bending machine cylinder, the screw rotation and limit nut translation are achieved, and the problem of fixing the press dead point under the existing cylinder is solved, improving versatility and flexibility in use.
Patent Information
- Application Number
- CN202421686544.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The lower press dead point of the existing bending machine cylinder is fixed, which is poor in versatility and inflexible in use.
A controllable oil cylinder for lower pressing dead point is designed. By setting a worm gear box and a servo motor-driven worm, the rotation of the screw and the translation of the limit nut are realized, and the lower pressing dead point is automatically controlled.
It realizes automatic control of dead points under process requirements, improves the versatility and flexibility of the oil cylinder, and has a more ideal use effect.
Smart Images
Figure CN222797815U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bending machines and relates to a controllable lower dead point oil cylinder for bending machines. Background Art
[0002] Bending machine is a commonly used equipment, and the oil cylinder is an important part of the bending machine. The structure of the oil cylinder is simple, but the oil cylinder used in the bending machine often needs to control its pressing dead point in the bending process. Usually, a fixed limit nut is set in the general oil cylinder according to the process requirements to limit its pressing stroke point.
[0003] The oil cylinder adopting such technology can certainly be used, but its disadvantages are: the position of the limit nut is fixed, the versatility is poor, and the use is not flexible and convenient enough. Utility Model Content
[0004] In order to overcome the deficiencies of the prior art, the utility model provides a controllable lower dead point oil cylinder for a bending machine, which has good versatility, is more flexible to use, and has a more ideal use effect.
[0005] The utility model adopts the following technical scheme to achieve the above technical purpose: a controllable oil cylinder with a lower dead point for a bending machine, comprising a cylinder barrel, a piston inserted in the cylinder barrel, a cylinder top cover arranged at the top end of the cylinder barrel, a cylinder bottom seal arranged at the bottom edge of the cylinder barrel, a cylinder bottom flange arranged at the bottom end of the cylinder barrel, and a plug top seal arranged at the top peripheral edge of the piston, an oil inlet is provided on the cylinder barrel wall between the bottom surface of the cylinder top cover and the top surface of the plug top seal; a cylinder barrel wall below the plug top seal and above the cylinder bottom seal A lower oil port is opened in between, and it also includes a worm gear box arranged on the top surface of the cylinder barrel, a worm wheel coaxial with the piston is arranged in the worm gear box, a worm is meshingly connected to the worm wheel, two ends of the worm extend out of the corresponding side walls of the worm gear box, the piston is in the shape of a cylinder with an upper opening, a plug block is inserted into the top opening of the piston, a screw rod is arranged on the bottom surface of the worm gear, the screw rod passes through the cylinder top cover and then through the plug block and then extends into the piston barrel cavity, a limiting nut is screwed on the bottom of the screw rod, and the limiting nut is provided with a limiting groove that limits the limit nut to only move up and down when the screw rod rotates.
[0006] When the screw rod is rotated to a set position, the top surface of the limit nut is pressed and connected with the bottom surface of the plug top block.
[0007] The transmission ratio of the worm and the worm wheel is 50:1; the lead of the screw is 2 mm.
[0008] The inner wall of the piston cylinder is provided with a keyway, and the limiting nut has only the freedom of upward and downward translation after being limited by the limiting groove and the key arranged in the keyway.
[0009] The two ends of the worm are connected to the corresponding side wall supports of the worm gear box through corresponding bearings; the top end of the wheel shaft of the worm wheel is connected to the top surface support of the worm gear box through corresponding bearings.
[0010] The worm is connected by a servo motor drive.
[0011] The beneficial effects of the utility model are as follows: due to the adoption of the above structure, the utility model has the following advantages: the pressing dead point can be automatically controlled by a program according to the process requirements, the utility model has good versatility, the use is more flexible and convenient, and the use effect is more ideal. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The utility model is further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 It is a schematic diagram of the utility model;
[0014] Figure 2 It is a disassembly schematic diagram of the utility model;
[0015] Figure 3 It is a further splitting and abbreviated schematic diagram of the utility model;
[0016] Figure 4 It is a schematic diagram of the utility model of the dissection abbreviation;
[0017] Figure 5 It is a further schematic diagram of the utility model.
[0018] The reference numerals in the accompanying drawings are as follows: worm gear box 1, worm 2, cylinder barrel 3, upper oil port 4, lower oil port 5, piston 6, worm gear 7, cylinder top cover 8, cylinder bottom flange 9, cylinder bottom seal 10, plug top seal 11, plug top block 12, limit nut 13, screw rod 14, limit groove 15 DETAILED DESCRIPTION
[0019] The embodiments of the present utility model are as follows: Figures 1 to 5As shown, a lower dead point controllable oil cylinder for a bending machine includes a cylinder barrel 3, a piston 6 inserted in the cylinder barrel 3, a cylinder top cover 8 arranged at the top end of the cylinder barrel 3, a cylinder bottom seal 10 arranged in the cylinder barrel 3 near the bottom edge, a cylinder bottom flange 9 arranged at the bottom end of the cylinder barrel 3, and a plug top seal 11 arranged at the top peripheral edge of the piston 6. An upper oil port 4 is opened on the wall of the cylinder barrel 3 between the bottom surface of the cylinder top cover 8 and the top surface of the plug top seal 11; a lower oil port 5 is opened on the wall of the cylinder barrel 3 between the bottom of the plug top seal 11 and the top of the cylinder bottom seal 10, and also includes a A worm gear box 1 is on the top surface of the cylinder barrel 3, and a worm gear 7 coaxial with the piston 6 is provided in the worm gear box 1. A worm 2 is meshingly connected to the worm gear 7, and both ends of the worm 2 extend out of the corresponding side walls of the worm gear box 1. The piston 6 is in the shape of a cylinder with an upper opening, and a plug top block 12 is inserted into the top opening of the cylinder of the piston 6. A screw rod 14 is provided on the bottom surface of the worm gear 7, which passes through the cylinder top cover 8 and then through the plug top block 12 and then extends into the cylinder cavity of the piston 6. A limiting nut 13 is screwed on the bottom of the screw rod 14, and a limiting groove 15 is provided on the limiting nut 13 to limit the limiting nut 13 to only move up and down when the screw rod 14 rotates.
[0020] When the screw rod 14 rotates to a set position, the top surface of the limit nut 13 is pressed against and connected to the bottom surface of the plug top block 12 .
[0021] The transmission ratio of the worm 2 to the worm wheel 7 is 50:1: the lead of the screw 14 is 2 mm.
[0022] The inner wall of the piston 6 is provided with a keyway, and the limiting nut 13 is limited by the limiting groove 15 and the key provided in the keyway so that it has only the freedom of upward and downward translation.
[0023] The two ends of the worm 2 are connected to the corresponding side wall supports of the worm gear box 1 through corresponding bearings; the top end of the wheel shaft of the worm wheel 7 is connected to the top surface support of the worm gear box 1 through corresponding bearings.
[0024] The worm 2 is connected by a servo motor drive.
[0025] The working principle of the utility model is as follows: as long as a subroutine system for controlling the rotation of the worm 2 is added to the control system of the bending machine, the lower pressing dead point of the oil cylinder can be flexibly controlled according to the process requirements.
Claims
1. A controllable oil cylinder with a lower dead point for a bending machine, comprising a cylinder barrel, a piston inserted in the cylinder barrel, a cylinder top cover arranged at the top of the cylinder barrel, a cylinder bottom seal arranged at the bottom edge of the cylinder barrel, a cylinder bottom flange arranged at the bottom end of the cylinder barrel, and a plug top seal arranged at the top peripheral edge of the piston, an upper oil port is opened on the cylinder barrel wall between the bottom surface of the cylinder top cover and the top surface of the plug top seal; a lower oil port is opened on the cylinder barrel wall between the bottom of the plug top seal and the top of the cylinder bottom seal, characterized in that: The worm gear box also includes a worm gear coaxial with the piston, a worm gear meshingly connected to the worm gear, and two ends of the worm gear extending out of the corresponding side walls of the worm gear box. The piston is in the shape of a cylinder with an upper opening, and a plug block is inserted into the top opening of the piston. The bottom surface of the worm gear is provided with a lead screw which passes through the cylinder top cover and then through the plug block and then extends into the piston cylinder cavity. A limit nut is screwed to the bottom of the lead screw, and a limit groove is provided on the limit nut to limit the limit nut to only move up and down when the lead screw rotates.
2. The controllable lower dead point oil cylinder for a bending machine according to claim 1, characterized in that: When the screw rod is rotated to a set position, the top surface of the limit nut is pressed and connected with the bottom surface of the plug top block.
3. The controllable lower dead point oil cylinder for a bending machine according to claim 2, characterized in that: The transmission ratio of the worm and the worm wheel is 50:1; the lead of the screw is 2 mm.
4. The controllable lower dead point oil cylinder for a bending machine according to claim 3 is characterized in that: The inner wall of the piston cylinder is provided with a keyway, and the limiting nut has only the freedom of upward and downward translation after being limited by the limiting groove and the key arranged in the keyway.
5. The controllable lower dead point oil cylinder for a bending machine according to claim 4, characterized in that: The two ends of the worm are connected to the corresponding side wall supports of the worm gear box through corresponding bearings; the top end of the wheel shaft of the worm wheel is connected to the top surface support of the worm gear box through corresponding bearings.
6. The controllable lower dead point oil cylinder for a bending machine according to claim 5, characterized in that: The worm is connected by a servo motor drive.