External View and Related Structural Parameters of SWL Screw Jack.

 

I. Overview

 

In the field of industrial transmission equipment, SWL screw jacks, with their diverse combination forms and wide applicability, have become reliable assistants in numerous application scenarios. Shanghai Dianmai Transmission Technology Co., Ltd. hereby elaborates on the structural forms and other related information of several commonly used SWL screw jacks for you, so that you can have a clearer understanding when making selections.

 

II. Overview of the External View

 

SWL screw jacks possess a rich variety of structural types, assembly types, and screw head types. These different combinations endow them with the characteristics of being able to meet the requirements of various working conditions. Through the following detailed introductions of each part type, you will be able to understand their external appearance and functional features more intuitively.

 

III. Structural Types

 

SWL screw jacks mainly have the following two structural types:

 

1. Type 1 – Axial Movement of the Screw

 

In this structural type, the screw moves along its axial direction to realize the lifting function of the jack. This type is applicable to some application scenarios with specific requirements for the axial displacement of the screw. For example, in some equipment that requires precise control of vertical displacement, the Type 1 structure can well meet the needs.

 

2. Type 2 – Rotational Movement of the Screw and Axial Movement of the Nut

 

Different from Type 1, in the Type 2 structure, the screw rotates while the nut moves axially to achieve the lifting action of the jack. This structure is commonly used in some equipment where the rotational part drives the axial displacement. It can effectively convert the rotational force of the screw into the axial thrust of the nut, thereby realizing stable lifting operations.

 

IV. Assembly Types

 

The assembly types are mainly divided into the following two categories:

 

1. Type A – Upward Movement of the Screw/ or Nut

 

When the Type A assembly type is adopted, whether it is the screw itself or the nut that cooperates with it, they will move upward during the operation of the jack. This type is widely used in some equipment that requires lifting objects upward. For example, in a goods lifting device, if you want the object to move upward steadily to the specified height, the SWL screw jack with the Type A assembly type may be a good choice.

 

2. Type B – Downward Movement of the Screw/ or Nut

 

Type B is just the opposite. When the jack is working, the s crew or the nut will move downward. In some specific industrial scenarios, such as when a component needs to be slowly lowered from a high place for maintenance or replacement operations, the SWL screw jack with the Type B assembly type can play its unique role to ensure that the object can move downward safely and stably.

 

V. Screw Head Types

 

According to different structural types, the screw head types also vary:

 

1. Screw Heads of Type 1 Structural Type

 

Type I (Cylindrical):

 

Simple in structure and convenient for connection, suitable for equipment that does not require high connection precision but needs to ensure connection stability.

 

Type II (Flanged):

 

With a flange, the connection is stable, suitable for equipment that needs to withstand large lateral forces or has requirements for sealing.

 

Type III (Threaded):

 

Connected by threads, with a tight and adjustable connection, suitable for equipment that requires precise adjustment or a high degree of fastening.

 

Type IV (Flat-Head):

 

With a special shape, suitable for equipment that requires a special connection method or cooperation with components of a specific shape.

 

2. Screw Heads of Type 2 Structural Type

 

Type I (Cylindrical):

 

Simple in structure and convenient for connection, suitable for general connection requirement scenarios.

 

Type III (Threaded):

 

Connected by threads, suitable for equipment that needs to ensure connection tightness and adjustability.

 

VI. Transmission Ratios

 

The transmission ratios of SWL screw jacks are diversified, mainly including the following types:

 

1. Ordinary Speed Ratio (P)

 

Applicable to application scenarios with regular requirements for lifting speed.

 

2. Slow Speed Ratio (M)

 

Applicable to situations that require slow and precise lifting operations.

 

3. Customizable Medium Speed Ratio (F)

 

Customized according to the specific requirements of users to achieve the best lifting effect.

 

VII. Lifting Capacity

 

SWL screw jacks have multiple lifting capacities to choose from, namely: 1kN, 2.5kN, 5kN, 10kN, 2.5kN, 25kN, 35kN, 50kN, 100kN. Different lifting capacities are applicable to the lifting requirements of objects with different weights.

 

VIII. Protection of the Screw

 

According to different structural types, the protection methods of the screw also vary:

 

1. Type 1 Structure

 

Basic Type (No Protection):

 

Applicable to scenarios with low requirements for screw protection and a good working environment.

 

Anti-Rotation Type (F):

 

Prevents the screw from rotating to ensure movement along the predetermined axial direction.

 

With Protective Cover (Z):

 

Prevents external dust and impurities from entering the interior of the screw.

 

Anti-Rotation with Protective Cover (FZ):

 

Combines the advantages of anti-rotation and protective cover.

 

2. Type 2 Structure

 

Basic Type (No Protection):

 

Applicable to scenarios with low requirements for protection.

 

IX. Conclusion

 

Through the above detailed introduction, we hope to provide you with comprehensive and accurate reference information when making selections, so that you can choose the most suitable SWL screw jack according to your actual needs.
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The Relationship between the Lifting Force and the Lifting Speed of Screw Jacks

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