Adjustable constant force device
A constant force device and adjustable technology, which is applied in the direction of vibration suppression adjustment, spring/shock absorber, mechanical equipment, etc., can solve the problems of non-adjustable constant force, low balance precision, and excessive structural size
Inactive Publication Date: 2013-12-11
BEIJING UNIV OF TECH
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Problems solved by technology
[0003] The purpose of the present invention is to propose a method of using ordinary springs and stepper motors to achieve the above-mentioned shortcomings such as excessive structural size, low balance precision, non-adjustable constant force and unsuitable for the balance of high-speed moving parts in the existing constant force technology. A device with constant force and the size of the constant force can be intelligently adjusted
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[0015] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0016] Such as figure 1 As shown, an adjustable constant force device according to the present invention includes a constant force mechanism and a force adjustment part; the constant force mechanism includes two tension springs 4, two compression springs 8, and a mobile platform 5 , Bracket 9, stage clip holder 6, steel wire 7; Described force adjustment part comprises stepper motor holder 1, stepper motor 2, slider 3, LED 10, mirror 12, photocell 11. Both sides of the upper end of the described mobile translation 5 are fixedly connected with one end of two extension springs 4, and the lower end is fixedly connected with one end of two stage clips 8, and the other end of stage clip 8 is connected together with stage clip holder 6, The compression spring fixing seat 6 and the bracket 9 are fixed together by bolts, the upper end of the extension spring 4 is fi...
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The invention belongs to the field of gravity balance devices in precision equipment, and particularly relates to an adjustable constant force device. Two springs with the same stiffness factor and structural dimension are arranged on a straight line; one end of each spring is fixedly connected with a constant force stress substance, and the other end is fixedly connected with a bracket; one spring is pressed, the other spring is pulled, and the stress direction is the same as the gravity direction; the composite force of the two springs is the constant force; the springs with different retraction quantities and rigidity factors can be replaced to obtain different magnitudes of constant force within different motion ranges; and a stepping motor and a zero bit detection device can be utilized to automatically perform gravity balance on mobile platforms with different weights.
Description
technical field [0001] The invention belongs to the field of precision equipment gravity balance devices, and in particular relates to an adjustable constant force device. Background technique [0002] In the field of precision equipment, such as three-dimensional contact scanning probes, it is required that some moving parts are not affected by gravity, that is, a device is required to make the moving parts always receive a force that is equal in magnitude and opposite to gravity within the range of motion, and The size of the structure itself is small, and at the same time, due to the quality of the moving parts themselves, different parts will be replaced due to work needs, and it is required to be able to adjust the size of the balance force that balances the gravity of the moving parts. The methods of constant force that can be obtained at present include: constant force spring, mechanical counterweight balance, hydraulic balance, air pressure balance and other methods....
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IPC IPC(8): F16F15/00
Inventor 胡洪平臧维
Owner BEIJING UNIV OF TECH