Precise positioning pressure device
Through the combination of the servo motor and the pressure cylinder, the precise pressure positioning device is achieved by using the trapezoidal threads of the screw and nut, which solves the problems of insufficient positioning accuracy and large energy consumption in the prior art, and achieves high-precision and stable pressure load application.
Patent Information
- Application Number
- CN202311772407.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2024-12-17
AI Technical Summary
The existing linear motion pressure devices have insufficient process positioning accuracy at any position, and there are problems such as large energy consumption, large volume and expensive cost.
The servo motor is combined with the pressure cylinder, and precise positioning is achieved through the trapezoidal threads of the screw and nut, and the pressure load is provided through the hydraulic cylinder, and the pressure control is performed using a reducer and an electronic pressure gauge.
The high accuracy and stability of the precise pressure positioning device are achieved, reducing device volume and energy consumption, while reducing cost, and simple and reliable operation.
Smart Images
Figure CN119146113A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of machine tool pressure component control, in particular to a precise positioning pressure device. Background Art
[0002] For all linear motion situations that require precise process positioning at any position and ultimately require a pressure load, existing designs use large-tonnage pressure devices, such as hydraulics, gas-liquid boosters, servo electric cylinders, etc., which generally have some defects such as high energy consumption and large size.
[0003] During the working process, hydraulic and gas-liquid boosting need to do process positioning at any position in the total stroke of the work, which will result in insufficient precision. Normal over-position positioning can also achieve precise positioning if a servo valve is used, but the cost is expensive. Servo electric cylinders can be well positioned at any position, but the motor power is large, and the size and weight are relatively large. Summary of the invention
[0004] The purpose of the present invention is to solve the above problems and provide a precise positioning pressure device, which can accurately position the device through a servo motor and provide pressure through a pressure cylinder. The two cooperate to form precise positioning and provide load at the positioning point at the same time.
[0005] The technical solution adopted by the present invention is: A precise positioning pressure device, characterized in that it includes a pressure cylinder and a servo motor, the piston of the pressure cylinder is hollow, an upper nut and a lower nut are arranged in the piston, the upper nut and the lower nut are provided with a screw, the upper nut is connected to the servo motor through a synchronous belt, the lower part of the screw is used to install a motion unit, after the servo motor drives the screw to move up and down for positioning, the piston of the pressure cylinder applies pressure to the motion unit on the screw to realize the pressure load.
[0006] Furthermore, the pressure cylinder is provided with pressure oil by a hydraulic oil cylinder, and the hydraulic oil cylinder is connected to the pressure cylinder through an oil pipe to provide a pressure source for the pressure cylinder, and the hydraulic oil cylinder generates pressure by the push and pull force of the reducer.
[0007] Furthermore, the reducer generates a push-pull force on the hydraulic cylinder through the worm gear and the lead screw.
[0008] Furthermore, an electronic pressure gauge is provided on the oil pipe, and the electronic pressure gauge is connected to a control unit, and the control unit controls the output power of the reducer to adjust the working pressure of the pressure cylinder.
[0009] Furthermore, a positioning control device is installed on the servo motor to control the operation of the servo motor.
[0010] Furthermore, the threads of the screw and the nut are trapezoidal threads.
[0011] Furthermore, the servo motor is mounted on an extension portion of the housing of the pressure cylinder.
[0012] The beneficial effects of the present invention are: (1) The servo motor drives the screw to accurately position, so that the moving load part can be accurately positioned and pressed; (2) The trapezoidal thread of the screw has a small self-locking angle and can stably maintain the load; (3) The device has a compact structure, is easy to install, simple to operate, and is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Attached Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Attached Figure 2 It is a schematic diagram of the internal section of the pressure cylinder.
[0014] The reference numerals in the accompanying drawings are: 1. Pressure cylinder; 2. Servo motor; 3. Piston; 4. Upper nut; 5. Lower nut; 6. Screw; 7. Hydraulic cylinder; 8. Reducer; 9. YouTube. DETAILED DESCRIPTION
[0015] The specific implementation of the precise positioning pressure device of the present invention will be described in detail below with reference to the accompanying drawings.
[0016] See attached Figure 1 , 2 The precise positioning pressure device includes a pressure cylinder 1 and a servo motor 2. The piston 3 of the pressure cylinder 1 is hollow. An upper nut 4 and a lower nut 5 are arranged in the piston 3. The upper nut 4 and the lower nut 5 are provided with a screw 6. The upper nut 4 is connected to the servo motor 2 through a synchronous belt. The servo motor 2 can be installed on an extension part on the shell of the pressure cylinder 1.
[0017] The lower part of the screw rod 6 is used to install the motion unit. After the servo motor 2 drives the screw rod 6 to move up and down to position, the piston 3 of the pressure cylinder 1 applies pressure to the motion unit on the screw rod 6 to realize the pressure load.
[0018] The pressure load of the pressure cylinder 1 can be provided by a hydraulic station, or the pressure oil can be provided by the equipped hydraulic cylinder 7. The hydraulic cylinder 7 is connected to the pressure cylinder 1 through an oil pipe 9 to provide a pressure source for the pressure cylinder 1. The hydraulic cylinder 7 generates pressure by the push and pull force of the reducer 8. The reducer 8 generates push and pull force on the hydraulic cylinder 7 through the worm gear and the screw.
[0019] In terms of control, the device is fully controlled by the control unit. An electronic pressure gauge is provided on the oil pipe, which is connected to the control unit. The control unit controls the output power of the reducer 8 to adjust the working pressure of the pressure cylinder 1. The control unit can achieve corresponding control through PLC, or achieve the purpose of control through industrial control software.
[0020] The screw 6 can be positioned by a positioning control device installed on the servo motor 2 to control the operation of the servo motor 2, such as using an encoder to accurately position the rotation speed and rotation angle of the servo motor 2, to ensure that the screw 6 is positioned at any position along its length.
[0021] The threads of the screw rod 6 and the nut are trapezoidal threads, which have a small self-locking angle. After positioning, they have a strong load-bearing capacity and can stably maintain the load.
[0022] When the present invention is used, after the pressure cylinder 1 is fixed, a motion processing mechanism is installed at the tail of the screw 6. The servo motor 2 drives the upper nut 4 to rotate through the synchronous belt, and cooperates with the rotation of the lower nut 5 to make the screw 6 move up and down in the piston 3. The position weighing is accurately controlled by the servo motor 2 through the control unit to achieve accurate positioning within the stroke. After reaching the positioning position, the pressure cylinder 1 applies a pressure load to the screw 6 through the piston 3. The load amount is controlled by the hydraulic cylinder 7. The pressure of the oil pipe 9 is controlled by the input power of the reducer 8, so that the pressure on the screw 6 reaches a predetermined value. The screw 6 transmits the pressure to the motion unit.
[0023] When unloading, the hydraulic cylinder 7 is depressurized by the motor, the pressure of the pressure cylinder 1 on the screw 6 is unloaded, and the servo motor 2 drives the screw 6 to reset.
[0024] The above are only preferred embodiments of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A precise positioning pressure device, characterized in that: It includes a pressure cylinder and a servo motor. The piston of the pressure cylinder is hollow. An upper nut and a lower nut are arranged in the piston. The upper nut and the lower nut are provided with a screw. The upper nut is connected to the servo motor through a synchronous belt. The lower part of the screw is used to install a motion unit. After the servo motor drives the screw to move up and down to position, the piston of the pressure cylinder presses the motion unit on the screw to realize the pressure load.
2. The precise positioning pressure device according to claim 1, characterized in that: The pressure cylinder is provided with pressure oil by a hydraulic oil cylinder, and the hydraulic oil cylinder is connected to the pressure cylinder through an oil pipe to provide a pressure source for the pressure cylinder, and the hydraulic oil cylinder generates pressure by the push and pull force of the reducer.
3. The precise positioning pressure device according to claim 2, characterized in that: The reducer generates a push and pull force on the hydraulic cylinder through a worm gear connected to a lead screw.
4. The precise positioning pressure device according to claim 2, characterized in that: An electronic pressure gauge is provided on the oil pipe, and the electronic pressure gauge is connected to a control unit, and the control unit controls the output power of the reducer to adjust the working pressure of the pressure cylinder.
5. The precise positioning pressure device according to any one of claims 1 to 4, characterized in that: A positioning control device is installed on the servo motor to control the operation of the servo motor.
6. The precise positioning pressure device according to any one of claims 1 to 4, characterized in that: The threads of the screw and the nut are trapezoidal threads.
7. The precise positioning pressure device according to any one of claims 1 to 4, characterized in that: The servo motor is mounted on an extension portion of the housing of the pressure cylinder.