Asia CZPT Elevator is a joint-stock enterprise integrating elevator R & D, design, production, sales, installation and maintenance. Its main products include passenger elevator, cargo elevator, sightseeing elevator, sickbed elevator, villa elevator, car elevator, escalator, automatic pedestrian way, sundry elevator, three-dimensional garage, and other products.
|Entrance(mm)||Clear car dimension (mm)||Caroutstide dimension (mm)||Clear hoistway dimension (mm)||Machine room dimension (mm)||Pit depth
|Pit reaction load
|Machine room reaction load(KN)||Rated power
High-end intelligent control system
The miniature energy-saving host system
It can save energy by more than 60% compared with the previous elevator technology, and meet the environmental protection requirements of minimum vibration, minimum machine room, no need for oil, maintenance-free with minimum noise.
360 check factory
This is a link for a 360° virtual Tour to our factory ASIA CZPT ELEVATOR (HangZhou) Co.,Ltd, through this video, you could check the whole aerial panorama for our factory, it includes the showroom; warehouse; workshop, etc. Through this video, you could have a better understanding of us.
Asia CZPT Elevator (HangZhou) Co., Ltd. is a joint-stock enterprise integrating R & D, design, production, sales, installation and maintenance of all kinds of elevators. Located in Xihu (West Lake) Dis. County, HangZhou City, ZheJiang Province, it is a key construction project attracting investment in HangZhou City in 2015, with a total area of 300 Mu and a total investment of 1.3 billion yuan. Products include passenger elevator, sightseeing elevator, household elevator, business elevator, medical elevator, villa elevator, cargo elevator, car elevator, escalator and sidewalk. At present, the company has won the honors of “national quality inspection stable and qualified products”, “national quality integrity excellent enterprise” and “high tech enterprise”, and has won 11 technical patents in the elevator industry.
Q1.Why choose us?
A1. Asia CZPT Elevator is a joint-stock enterprise integrating elevator R & D, design, production, sales, installation and maintenance. Famous brand, already be confirmed by many customers. Domestic and overseas Sample projects are customers’ voices for our quality.
Q2: What advantages do you have?
A2:The intelligent production line adopts ABB6700 series products, and adopts 360 rotation type, from feeding to bending, to enter the roll line turnover work, and at the same time, enters the stiffener, head, gluing and arc welding process. This technology could guarantee the machine’s accuracy.
Q3. What information is absolutely needed before asking for price?
A3: 1. How many persons?
( 6 persons for 450kg,8 persons for 630kg, 10 persons for 800kg etc..)
2. How many floors/ stops/ doors?
3. What’s the shaft size? (width by depth)
4. Is there a machine room on the top of the shaft?
Q4. How can we guarantee the good quality of your products?
A4 In during the production process we will inspect all purchased and produced parts and take a record after put in crates, before shipping out we will do the final inspection and mockup the cabin and sling set, this part take photo and video as a record to make customer being at ease.
Q5: WHAT’S THE PAYMENT TERM?
A5 30% in advance, 70% after customers inspection, before loading
Q6. What about the packaging?
A6: All elevator parts will be packed into solid wooden cases. Some parts will be wrapped by the film so that guarantee the machinery part not be destroyed after a long time of transportation.
Q7. How to do with the elevator installation and maintenance?
A7: We can send engineers to CZPT the installation and then train the workers about maintenance in the future. But in most situations, local workers can finish this work with our guidebooks and technology support, or you can ask the local professional elevator engineers to do this job, This can save money for our customers. Of course, you can get support from our factory at any time.
Q8. What’s your guarantee time?
A8; We can provide an 18months guarantee period, during this time, we will send free replacements to you. our service has no time limit.
How to Determine the Quality of a Worm Shaft
There are many advantages of a worm shaft. It is easier to manufacture, as it does not require manual straightening. Among these benefits are ease of maintenance, reduced cost, and ease of installation. In addition, this type of shaft is much less prone to damage due to manual straightening. This article will discuss the different factors that determine the quality of a worm shaft. It also discusses the Dedendum, Root diameter, and Wear load capacity.
There are various options when choosing worm gearing. The selection depends on the transmission used and production possibilities. The basic profile parameters of worm gearing are described in the professional and firm literature and are used in geometry calculations. The selected variant is then transferred to the main calculation. However, you must take into account the strength parameters and the gear ratios for the calculation to be accurate. Here are some tips to choose the right worm gearing.
The root diameter of a worm gear is measured from the center of its pitch. Its pitch diameter is a standardized value that is determined from its pressure angle at the point of zero gearing correction. The worm gear pitch diameter is calculated by adding the worm’s dimension to the nominal center distance. When defining the worm gear pitch, you have to keep in mind that the root diameter of the worm shaft must be smaller than the pitch diameter.
Worm gearing requires teeth to evenly distribute the wear. For this, the tooth side of the worm must be convex in the normal and centre-line sections. The shape of the teeth, referred to as the evolvent profile, resembles a helical gear. Usually, the root diameter of a worm gear is more than a quarter inch. However, a half-inch difference is acceptable.
Another way to calculate the gearing efficiency of a worm shaft is by looking at the worm’s sacrificial wheel. A sacrificial wheel is softer than the worm, so most wear and tear will occur on the wheel. Oil analysis reports of worm gearing units almost always show a high copper and iron ratio, suggesting that the worm’s gearing is ineffective.
The dedendum of a worm shaft refers to the radial length of its tooth. The pitch diameter and the minor diameter determine the dedendum. In an imperial system, the pitch diameter is referred to as the diametral pitch. Other parameters include the face width and fillet radius. Face width describes the width of the gear wheel without hub projections. Fillet radius measures the radius on the tip of the cutter and forms a trochoidal curve.
The diameter of a hub is measured at its outer diameter, and its projection is the distance the hub extends beyond the gear face. There are 2 types of addendum teeth, 1 with short-addendum teeth and the other with long-addendum teeth. The gears themselves have a keyway (a groove machined into the shaft and bore). A key is fitted into the keyway, which fits into the shaft.
Worm gears transmit motion from 2 shafts that are not parallel, and have a line-toothed design. The pitch circle has 2 or more arcs, and the worm and sprocket are supported by anti-friction roller bearings. Worm gears have high friction and wear on the tooth teeth and restraining surfaces. If you’d like to know more about worm gears, take a look at the definitions below.
CZPT’s whirling process
Whirling process is a modern manufacturing method that is replacing thread milling and hobbing processes. It has been able to reduce manufacturing costs and lead times while producing precision gear worms. In addition, it has reduced the need for thread grinding and surface roughness. It also reduces thread rolling. Here’s more on how CZPT whirling process works.
The whirling process on the worm shaft can be used for producing a variety of screw types and worms. They can produce screw shafts with outer diameters of up to 2.5 inches. Unlike other whirling processes, the worm shaft is sacrificial, and the process does not require machining. A vortex tube is used to deliver chilled compressed air to the cutting point. If needed, oil is also added to the mix.
Another method for hardening a worm shaft is called induction hardening. The process is a high-frequency electrical process that induces eddy currents in metallic objects. The higher the frequency, the more surface heat it generates. With induction heating, you can program the heating process to harden only specific areas of the worm shaft. The length of the worm shaft is usually shortened.
Worm gears offer numerous advantages over standard gear sets. If used correctly, they are reliable and highly efficient. By following proper setup guidelines and lubrication guidelines, worm gears can deliver the same reliable service as any other type of gear set. The article by Ray Thibault, a mechanical engineer at the University of Virginia, is an excellent guide to lubrication on worm gears.
Wear load capacity
The wear load capacity of a worm shaft is a key parameter when determining the efficiency of a gearbox. Worms can be made with different gear ratios, and the design of the worm shaft should reflect this. To determine the wear load capacity of a worm, you can check its geometry. Worms are usually made with teeth ranging from 1 to 4 and up to twelve. Choosing the right number of teeth depends on several factors, including the optimisation requirements, such as efficiency, weight, and centre-line distance.
Worm gear tooth forces increase with increased power density, causing the worm shaft to deflect more. This reduces its wear load capacity, lowers efficiency, and increases NVH behavior. Advances in lubricants and bronze materials, combined with better manufacturing quality, have enabled the continuous increase in power density. Those 3 factors combined will determine the wear load capacity of your worm gear. It is critical to consider all 3 factors before choosing the right gear tooth profile.
The minimum number of gear teeth in a gear depends on the pressure angle at zero gearing correction. The worm diameter d1 is arbitrary and depends on a known module value, mx or mn. Worms and gears with different ratios can be interchanged. An involute helicoid ensures proper contact and shape, and provides higher accuracy and life. The involute helicoid worm is also a key component of a gear.
Worm gears are a form of ancient gear. A cylindrical worm engages with a toothed wheel to reduce rotational speed. Worm gears are also used as prime movers. If you’re looking for a gearbox, it may be a good option. If you’re considering a worm gear, be sure to check its load capacity and lubrication requirements.
The NVH behavior of a worm shaft is determined using the finite element method. The simulation parameters are defined using the finite element method and experimental worm shafts are compared to the simulation results. The results show that a large deviation exists between the simulated and experimental values. In addition, the bending stiffness of the worm shaft is highly dependent on the geometry of the worm gear toothings. Hence, an adequate design for a worm gear toothing can help reduce the NVH (noise-vibration) behavior of the worm shaft.
To calculate the worm shaft’s NVH behavior, the main axes of moment of inertia are the diameter of the worm and the number of threads. This will influence the angle between the worm teeth and the effective distance of each tooth. The distance between the main axes of the worm shaft and the worm gear is the analytical equivalent bending diameter. The diameter of the worm gear is referred to as its effective diameter.
The increased power density of a worm gear results in increased forces acting on the corresponding worm gear tooth. This leads to a corresponding increase in deflection of the worm gear, which negatively affects its efficiency and wear load capacity. In addition, the increasing power density requires improved manufacturing quality. The continuous advancement in bronze materials and lubricants has also facilitated the continued increase in power density.
The toothing of the worm gears determines the worm shaft deflection. The bending stiffness of the worm gear toothing is also calculated by using a tooth-dependent bending stiffness. The deflection is then converted into a stiffness value by using the stiffness of the individual sections of the worm shaft. As shown in figure 5, a transverse section of a two-threaded worm is shown in the figure.