Custom constant force spiral spring for tobacco shelf pusher

Traditional power springs and preloaded springs

Time:2022-9-3

Traditional power springs and preloaded power springs are fabricated from spring steel bars to provide torque. Spring steel is a low alloy, medium carbon steel or high carbon steel with a very high yield strength. Objects made of spring steel can return to their original shape despite significant bending or twisting. Power springs use flat (unstressed) steel windings, while pre-stressed power springs use pre-stressed steel to produce a larger range of usable torque than conventional power springs.          During the manufacturing process, the spring is wound into the retaining ring or the customer's housing (the retaining ring is pictured below). When ready for final installation, carefully install the spring into its housing with the outer end attached to the outer edge and the inner end attached to the mandrel (see photo below). During operation, the housing or mandrel will be fixed while the other component is free to rotate. Depending on the requirements of your specific design, it may be beneficial to use a fixed mandrel/free box or free box/fixed mandrel arrangement.        These springs are typically used to retract the cord or cable of the spool. You might see it in lawn mowers, retractable lanyards, or dog leashes. This is also the type of spring used to drive many mechanical clocks and timers, which is why they are sometimes called "clock springs". The load provided by the spring increases with the cross-sectional area of ​​the material. The number of turns the spring can provide depends on the space available between the mandrel and the...

3 types of springs and some common applications

Time:2022-9-14

Smooth Range of Motion: Constant Force Springs Constant force springs provide a smooth range of motion and constant load, meaning they do not follow Hooke’s law. They are uniform in length and coiled into a permanent diameter. Constant force springs are frequently used for applications that require counterbalancing, including windows. In fact, window balance springs are one of our most successful products. In addition, the springs we manufacture are often designed for medical devices and aerospace applications. Their smooth range and steady motion control enhance instrument articulation.   High Torque with Little Rotation: Spiral Torsion Springs Spiral torsion springs are another popular product we manufacture.These springs are ideal for applications that require high torque and less than 360 degrees of rotation. (270 degrees maximum is preferred). Spiral torsion springs are commonly used in applications that require a “return to center” function, like a medical instrument joystick. They’re also ideal for electric motors and automotive applications. If your application requires this “return to center” function, developing a custom spiral torsion spring may be the best solution. Torque with Significant Rotation: Power Springs Power springs (also referred to as clock springs) are appropriately named due to their rotational energy that takes the form of torque. The torque increases as the spring is wound tighter. They are wound around an arbor or shaft and are retained in a housing. Their large rotation capabilities make them an ideal spring for a number of automotive applications or medical devices. Power springs are also frequently used for counterbalance mechanisms in industrial sectors. Custom vs. Stock Springs: Which are Best for You? As you begin to develop...

Constant force spring for realizing smooth movement of CT scanning table

Time:2022-9-14

We are familiar with CT scanner. Now when we go to the hospital for examination, we often hear the doctor say "take a film first". This film generally refers to CT. Doing CT is not only for the safety of patients, but also for the safety of doctors. CT is much clearer than X-ray film. At the same time, there are many diseases that cannot be seen on B-ultrasound and can be diagnosed by CT. At present, CT is the most widely used imaging examination under medical treatment and the most valuable examination for clinical information. When you go to take CT, you lie down on the scanning table, and the scanning table will automatically move smoothly and accurately locate the position. Have you ever thought about this problem because you want to relieve tension? The CT scanner table can move smoothly and accurately because of the role of the constant force spring in it. Some little friends may not know what the constant force spring is. When it comes to the spring, everyone must think it is the traditional linear spring. In fact, it is not. Constant force spring is made of stainless steel strip. The high-strength steel strip is shaped through specific spring production equipment. When it is straightened by external force, the spring will naturally roll back and produce elastic force, However, to achieve our goal, we can return to our designated starting point after the shift. The constant force spring can achieve extremely high elastic output in a very small device space. Its function can be applied to products requiring linear motion such...

Automatic rolling shutter

Time:2022-9-14

   It has to be said that laziness is a major driving force to promote scientific and technological progress. The emergence of a series of smart appliances not only makes people's life intelligent and convenient, but also gives everyone more opportunities to "be lazy" to complete other work or things. The charm of smart appliances lies in the linkage control between devices and the configuration of scene mode. It only takes one step to control household appliances to achieve the expected effect, which is the most attractive.   At present, in the aspect of smart home decoration, a kind of automatic rolling curtain is more popular, which is also called electric rolling curtain. This is an electric rolling curtain structure with tubular motor as the power. It is quite simple to operate. It is controlled by remote control or mobile phone APP. As an upgrading alternative product of manual rolling curtain, its work is more quiet and stable. The motor is directly installed in the metal coil tube, which reduces the transmission link of the volume and force of the curtain box and avoids the influence of the external environment on the motor.There are two problems in the common electric curtains on the market. Compared with the traditional manual rolling curtain or the left and right open and close curtain, the electric operation of automatic rolling curtain is more convenient, and the adaptability is not weaker than the traditional curtain. At the same time, it also has the functions of anti-ultraviolet, environmental protection and energy saving, saving indoor space and...

Design of constant force springs

Time:2022-9-14

 A constant force spring is a spring that exerts a constant force over its range of motion. That is, it does not obey Hooke's law. Typically, a constant force spring is constructed as a coiled band of spring steel so that the spring relaxes when fully coiled. When it is unrolled, the restoring force comes mainly from the portion of the belt that is close to the roll. Since the geometry of this region remains nearly constant as the spring unfolds, the resultant force is nearly constant.       By creating a spring with a variable pitch, you can make a push-shape spring with a constant velocity. Placing a larger pitch in a larger outer diameter coil and a smaller pitch in a smaller outer diameter coil will force the single spring to fold all coils at the same rate when compressed.       Design of Constant Force Springs: A constant force spring is a coil of prestressed tape that exerts a nearly constant restraining force against unwinding (Figures 1 and 2). The force is constant because the change in the radius of curvature is constant. This is the case if the change in coil diameter due to buildup is not taken into account. Long reach, constant torque and virtually no friction have led many designers to specify constant force springs in applications such as sliding doors and windows and height adjustment of computer monitors and fans, store display shelves or motor carbon brush motors . Constant force motor springs are also used to drive mechanisms for timers,...

Application of carbon brush spring in wind turbine slip ring brush holder

Time:2022-9-14

In order to prevent accidents caused by excessive wear of the carbon brushes on the collector device of the slip ring brush holder of the wind turbine, a normally closed switch-type alarm unit is configured for each carbon brush, and these alarm units are connected in series to the alarm. In the prior art, the grounding brush is held on the structure using a coil spring pressure finger lever structure. In order to ensure sufficient pressure after the carbon brush is worn, the initial pressure of the spring has to be increased, which aggravates the wear of the carbon brush. However, in the later stage of carbon brush wear, the tension of the coil spring becomes insufficient again, resulting in poor contact between the carbon brush and the slip ring, frequent beating, resulting in breakage; at the same time, from the carbon brush to the alarm unit, the intermediate link is complex and easy to Lead to false alarm or no alarm, reducing the reliability of the system. In order to overcome the shortcomings of the prior art, a novel slip ring brush holder collector of wind turbine generator with simple structure, reduced wear of grounding carbon brushes and reliable operation is provided. The slip ring brush holder collector of wind turbine includes slip ring, brush holder, main carbon brush and grounding carbon brush, and the pressure end of the grounding carbon brush with alarm pressure piece is pressed by a coiled constant pressure spring. The constant pressure spring grounding brush holder structure greatly improves the force on the carbon brush during operation and...

Custom springs for medical devices

Time:2022-9-14

For most of the past two decades, the medical device industry has been booming. Healthcare research has led to the rapid expansion of specific devices used to treat medical needs, from rare to common. These devices range from simple to surprisingly complex, often including automatic sensors, computer monitoring, and even remote monitoring by healthcare providers. When you are designing for a new medical device, it is essential to consider the components you must put together and the system they will create. This means breaking down your design to a level where you can visualize the components that need to go into the project. This means designing each spring assembly individually after evaluating the available options. To help you solve this problem, here are the four most commonly used springs for medical devices and their current common applications.    Constant force springs Constant force springs provide a smooth range of motion and a constant load in either extending or retracting direction. This spring design has no inertia to overcome when considering the initial position forces. Constant force springs are compact and mount easily to existing hardware. These types of springs can eliminate the need for costly and complicated motors, thus decreasing device size and cost.   Spiral torsion springs Spiral torsion springs are normally used in applications requiring less than 360 degrees of rotation. They are generally used to obtain a large amount of torque through a small amount of rotation. Spiral torsion springs allow for rotation in two directions and a “return to center” capability, like a dental X-ray head unit.   Spring reels Spring powered...

Application of constant force spring in self weight balance mechanism of sampling device

Time:2022-9-14

At present, various sample probes and reagent probes are used in medical laboratory equipment to suck samples, add samples, suck and test u, add reagents, measure and other operations. Most of the devices used in these action combinations are intelligent sampling devices, and the system used can automatically process data. Due to the full function and complex mechanism of the sampling device, the self weight of the system device is large, This brings higher and higher performance and power requirements to the driving motors of various sampling devices. The self weight balance mechanism is set between the sampling device and the main structure and is composed of a lifting device and a constant force spring. The lifting device is composed of gears, racks and linear guide rails. The gears are driven by the motor and fixed on the main structure with the motor. The rack and the gear mesh to move up and down. The rack is fixed on the linear guide rail and the sampling device is fixed on the rack, The lifting device can also be composed of gear combination roller chain or synchronous belt, ball screw or flexible rope. The upper end of the constant force spring is fixed on the main structure, and the lower end of the constant force spring is wound on a roll shaft on the sampling device. The roll shaft can rotate with the rise and fall of the sampling device. According to the height of the rise and fall of the sampling device, the excess part of the constant force spring can always be wound on the roll...