Product Description
Sadin 4*4 Wheel Drive 70HP 704 Garden Tractor with ROPS
Tractor Main Features and Advantages:
1. Equipped famous brand engine showing advanced capacity, low fuel consumption and high economic efficiency.
2. Streamlined appearance design, beautiful and generous.
3. Transmission Case adopt meshed shift and add the gearbox interlock device makes the operation more smoothly, reliable and easier.
4. Double action clutch with disc spring, perform steadily and easy to operate.
5. Fully hydraulic steering system greatly reduced driver’s work strength.
6. Wet disc brake device, reliable brake performance.
7. Separate injection of hydraulic oil, reliable to operate.
8. The lifter with force and position adjustment, with reliable lift.
9. Tractor PTO:
PTO in Double speed: 540/1000, 760/1000, 540/760r/min Optional, For high working efficiency.
PTO shaft of 6 or 8 spline Optional, adaptable for agricultural equipment of all over the world.
Full series light, ROPS, Sunshade/Canopy, Fan/Heater/Air-conditioned cabin are all available, for more comfortable driving environment
Product feature
1, the use of reinforced chassis, strong and reliable, power output shaft shifting and gearbox sub-shifting with the shifting sleeve shifting, shifting easier.
2. The mud water sealing performance is superior, which is very suitable for paddy field operations.
3. The hydraulic lifting system is individually adjusted to better suit various job requirements. Supporting agricultural machinery can be used for ploughing, rotary tillage, beating, trenching, hoeing, sowing, cultivating, harvesting, smashing, trailers, etc.
4. It can also be used as a power source for pumping and threshing, and is suitable for medium and large plots.
5. We can add other equipment according to customer’s requirements
Packing and Shipping
Company Profile
ZheJiang hunter Longyu Technology Co., Ltd. is a one-stop overall solution service provider integrating r&d, manufacturing, sales, operation, leasing and construction. high-tech enterprise, is the qualified supplier of the United States Caterpillar, Korea Doosan, Germany Volvo, CZPT Group, Zoomlion, Liugong, Lingong, HangZhou Intelligent and many other world famous enterprises. Subordinate CZPT Hunter Technology, Lianzhong Heavy Science and technology and other units, China Construction Machinery Industry Association council unit, ZheJiang Province construction machinery Leasing Association president unit. With research and development personnel and high-quality construction team of more than 100 people, has advanced engineering machinery equipment and a variety of mining equipment more than 100 sets, is a involved in new energy, environmental governance, photovoltaic industry, conditions, pile foundation engineering, underground pipe gallery, municipal engineering, airport construction, mining operations is equal to the mechanization of the integration of large-scale engineering equipment co., LTD.
Successively participated in: HangZhou-HangZhou freight railway project, HangZhou-An-ZheJiang Expressway project, HangZhou second and third ring Expressway project, HangZhou-Ren Expressway project, HangZhou-ZheJiang passenger transport special line high-speed railway project, HangZhou CZPT Station subway project, ZheJiang CZPT International Airport, ZheJiang -ZheJiang Line railway and other key civil construction mechanized construction projects, which were highly praised by the owners To become the southwest construction machinery industry has a certain scale and influence, extremely innovative technology enterprises.
FAQ
Q: Are you a manufacturer / factory?
A: Yes, we are the manufacturer and established in 2009. Welcome to visit Hunter longyu. We can provide much more cost-effective attachments for construction machinery. Our principle is top-class equipment make best products. You can find kinds of top quality attachments have exported the products to all over the world, based on our best quality and excellent service. We are sure you will be satisfied with our best after-sale service.
Q: Do you accept OEM?
A: Yes, OEM & customized manufacturing are available. Please send us the drawings, we can produce the products as your request.
Q: Can I have some samples?
A: Of course, sample order is available. Lead time: 10days. Customized samples: About 15-25 days.
How to Choose the Right Worm Shaft
You might be curious to know how to choose the right Worm Shaft. In this article, you will learn about worm modules with the same pitch diameter, Double-thread worm gears, and Self-locking worm drive. Once you have chosen the proper Worm Shaft, you will find it easier to use the equipment in your home. There are many advantages to selecting the right Worm Shaft. Read on to learn more.
Concave shape
The concave shape of a worm’s shaft is an important characteristic for the design of a worm gearing. Worm gearings can be found in a wide range of shapes, and the basic profile parameters are available in professional and firm literature. These parameters are used in geometry calculations, and a selection of the right worm gearing for a particular application can be based on these requirements.
The thread profile of a worm is defined by the tangent to the axis of its main cylinder. The teeth are shaped in a straight line with a slightly concave shape along the sides. It resembles a helical gear, and the profile of the worm itself is straight. This type of gearing is often used when the number of teeth is greater than a certain limit.
The geometry of a worm gear depends on the type and manufacturer. In the earliest days, worms were made similar to simple screw threads, and could be chased on a lathe. During this time, the worm was often made with straight-sided tools to produce threads in the acme plane. Later, grinding techniques improved the thread finish and reduced distortions resulting from hardening.
When a worm gearing has multiple teeth, the pitch angle is a key parameter. A greater pitch angle increases efficiency. If you want to increase the pitch angle without increasing the number of teeth, you can replace a worm pair with a different number of thread starts. The helix angle must increase while the center distance remains constant. A higher pitch angle, however, is almost never used for power transmissions.
The minimum number of gear teeth depends on the angle of pressure at zero gearing correction. The diameter of the worm is d1, and is based on a known module value, mx or mn. Generally, larger values of m are assigned to larger modules. And a smaller number of teeth is called a low pitch angle. In case of a low pitch angle, spiral gearing is used. The pitch angle of the worm gear is smaller than 10 degrees.
Multiple-thread worms
Multi-thread worms can be divided into sets of one, two, or four threads. The ratio is determined by the number of threads on each set and the number of teeth on the apparatus. The most common worm thread counts are 1,2,4, and 6. To find out how many threads you have, count the start and end of each thread and divide by two. Using this method, you will get the correct thread count every time.
The tangent plane of a worm’s pitch profile changes as the worm moves lengthwise along the thread. The lead angle is greatest at the throat, and decreases on both sides. The curvature radius r” varies proportionally with the worm’s radius, or pitch angle at the considered point. Hence, the worm leads angle, r, is increased with decreased inclination and decreases with increasing inclination.
Multi-thread worms are characterized by a constant leverage between the gear surface and the worm threads. The ratio of worm-tooth surfaces to the worm’s length varies, which enables the wormgear to be adjusted in the same direction. To optimize the gear contact between the worm and gear, the tangent relationship between the two surfaces is optimal.
The efficiency of worm gear drives is largely dependent on the helix angle of the worm. Multiple thread worms can improve the efficiency of the worm gear drive by as much as 25 to 50% compared to single-thread worms. Worm gears are made of bronze, which reduces friction and heat on the worm’s teeth. A specialized machine can cut the worm gears for maximum efficiency.
Double-thread worm gears
In many different applications, worm gears are used to drive a worm wheel. These gears are unique in that the worm cannot be reversed by the power applied to the worm wheel. Because of their self-locking properties, they can be used to prevent reversing motion, although this is not a dependable function. Applications for worm gears include hoisting equipment, elevators, chain blocks, fishing reels, and automotive power steering. Because of their compact size, these gears are often used in applications with limited space.
Worm sets typically exhibit more wear than other types of gears, and this means that they require more limited contact patterns in new parts. Worm wheel teeth are concave, making it difficult to measure tooth thickness with pins, balls, and gear tooth calipers. To measure tooth thickness, however, you can measure backlash, a measurement of the spacing between teeth in a gear. Backlash can vary from one worm gear to another, so it is important to check the backlash at several points. If the backlash is different in two places, this indicates that the teeth may have different spacing.
Single-thread worm gears provide high speed reduction but lower efficiency. A multi-thread worm gear can provide high efficiency and high speed, but this comes with a trade-off in terms of horsepower. However, there are many other applications for worm gears. In addition to heavy-duty applications, they are often used in light-duty gearboxes for a variety of functions. When used in conjunction with double-thread worms, they allow for a substantial speed reduction in one step.
Stainless-steel worm gears can be used in damp environments. The worm gear is not susceptible to rust and is ideal for wet and damp environments. The worm wheel’s smooth surfaces make cleaning them easy. However, they do require lubricants. The most common lubricant for worm gears is mineral oil. This lubricant is designed to protect the worm drive.
Self-locking worm drive
A self-locking worm drive prevents the platform from moving backward when the motor stops. A dynamic self-locking worm drive is also possible but does not include a holding brake. This type of self-locking worm drive is not susceptible to vibrations, but may rattle if released. In addition, it may require an additional brake to keep the platform from moving. A positive brake may be necessary for safety.
A self-locking worm drive does not allow for the interchangeability of the driven and driving gears. This is unlike spur gear trains that allow both to interchange positions. In a self-locking worm drive, the driving gear is always engaged and the driven gear remains stationary. The drive mechanism locks automatically when the worm is operated in the wrong manner. Several sources of information on self-locking worm gears include the Machinery’s Handbook.
A self-locking worm drive is not difficult to build and has a great mechanical advantage. In fact, the output of a self-locking worm drive cannot be backdriven by the input shaft. DIYers can build a self-locking worm drive by modifying threaded rods and off-the-shelf gears. However, it is easier to make a ratchet and pawl mechanism, and is significantly less expensive. However, it is important to understand that you can only drive one worm at a time.
Another advantage of a self-locking worm drive is the fact that it is not possible to interchange the input and output shafts. This is a major benefit of using such a mechanism, as you can achieve high gear reduction without increasing the size of the gear box. If you’re thinking about buying a self-locking worm gear for a specific application, consider the following tips to make the right choice.
An enveloping worm gear set is best for applications requiring high accuracy and efficiency, and minimum backlash. Its teeth are shaped differently, and the worm’s threads are modified to increase surface contact. They are more expensive to manufacture than their single-start counterparts, but this type is best for applications where accuracy is crucial. The worm drive is also a great option for heavy trucks because of their large size and high-torque capacity.
