Patent Publication Number: US-2021163053-A1

Title: Movable lifting device

Description:
TECHNICAL FIELD 
     The present invention relates to the field of handling small cargo in commercial and industrial settings, and in particular to a movable-type lifting device suitable for lifting and shifting floor scales. 
     BACKGROUND ART 
     Currently, manpower is employed for handling small cargo (100-500 Kg) because such cargo is usually unwieldy. 
     In general, it is desirable to use loading and transportation means, i.e., a forklift truck, or dedicated equipment such as a hoister for handling cargo. However, it is untenable to have dedicated loading and transportation equipment for small cargo. Such cargo handling equipment occupy valuable commercial and industrial space, thus driving up the overall cost of handling cargo. 
     Due to the absence of a reliable and cost efficient solution, small cargo is still generally handled by manpower or by means of dedicated equipment such as a forklift and/or a traveling crane. For this reason, small cargo handling operations continue to remain labour intensive. Even setting up dedicated equipment is time consuming due to difficulties in shifting, site specific constraints, costly repair and maintenance, and higher capital expenditure involved in owning said equipment. 
     In view of these shortcomings associated with prior art solutions, there is a need to develop a movable—type lifting device that can be employed for shifting floor scales in industrial and commercial settings. 
     SUMMARY OF INVENTION 
     The problem to be solved by the present invention is the absence of a simple and efficient solution for lifting and shifting of small cargo. The present invention overcomes the defects associated with prior art solutions available for loading and transporting small cargo. 
     The above-mentioned technical problem is solved by the present invention, in which there is provided: a movable-type lifting device, comprising a lifting and fixing device and a moving device, wherein one end of the lifting and fixing device is connected to the moving device and the other end thereof is connected to a cargo to-be-shifted; the lifting and fixing device further comprises a rotary screw, a lifting and fixing bracket; wherein the lifting and fixing bracket comprises a threaded sleeve and a bracket body, the bracket body extending outward and obliquely downward along an outer wall face of the threaded sleeve, and the rotary screw being mounted to the threaded sleeve; and the free rotation of the rotary screw converts rotary motion into a linear motion for lifting the cargo to-be-shifted. 
     According to an embodiment of the present invention, one end of the lifting and fixing bracket is connected to the cargo to-be-shifted by means of the fixed connection bolt. The rotary screw is in threaded connection with the other end of the lifting and fixing bracket. 
     According to an embodiment of the present invention, the rotary screw is mounted to the threaded sleeve to form a rotary motion to drive a bearing of the moving device to rotate. 
     According to one embodiment of the present invention, the moving device is a universal wheel. 
     According to one embodiment of the present invention, the lifting and fixing bracket is further provided with reinforcing ribs, and the reinforcing ribs are disposed on two sides of the bracket body. 
     According to one embodiment of the present invention, the reinforcing ribs surround the threaded sleeve and an outer side wall of the bracket body. 
     According to one embodiment of the present invention, a lower end of the bracket body is provided with a mounting table, and the mounting table is connected to the cargo to-be-shifted by means of the fixed connection bolt. 
     According to one embodiment of the present invention, two sides of the mounting table are provided with side plates, and the side plates are connected between the lower end of the bracket body and the mounting table. 
     According to one embodiment of the present invention, the cargo to-be-shifted is a floor scale. 
     The present invention has the following positive progressive effects: the movable-type lifting device of the present invention has a simple and flexible structure; it is easy to operate, and combines the functions of shifting and lifting; it is versatile and it can be adapted to wide range of applications. The inventive solution can significantly reduce the labour intensity and save valuable manpower, material resources, and costs, and it is easy to adopt. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above-mentioned and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, where: 
         FIG. 1  is a structural schematic representation of a movable-type lifting device of the present invention. 
         FIG. 2  is a representation of a movable-type lifting device of the present invention when in use. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     To make the above-mentioned object, features and advantages of the present invention more apparent and easy to understand, a detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. 
     An embodiment of the present invention will be described now in detail with reference to the accompanying drawings. Reference will be made now in detail to a preferred embodiment of the present invention, examples of which are illustrated in the accompanying drawings. The same reference numerals used in all the figures denote identical or similar parts wherever possible. 
     Furthermore, although the terms used in the present invention are selected from well-known common terms, some of the terms mentioned in the description of the present invention may have been selected by the applicant according to his or her determination, and the detailed meaning thereof will be illustrated in the relevant section described herein. 
     Furthermore, the present invention must be understood, not simply by the actual terms used but also by the meaning of each term. 
       FIG. 1  is a structural schematic representation of a movable-type lifting device of the present invention.  FIG. 2  represents a movable-type lifting device of the present invention when in use. 
     As shown in  FIGS. 1 and 2 , the present invention discloses a movable-type lifting device, comprising a lifting and fixing device  10  and a moving device  20 . One end of the lifting and fixing device  10  is connected to the moving device  20 , and the other end thereof is connected to a cargo to-be-shifted  30 . The free rotation of the lifting and fixing device  10  converts rotary motion into linear motion so as to displace the cargo to-be-shifted  30 . The cargo to-be-shifted  30  herein is preferably a floor scale. 
     Preferably, the lifting and fixing device  10  comprises a rotary screw  11 , a lifting and fixing bracket  12  and a fixed connection bolt  13 . One end of the lifting and fixing bracket  12  is connected to the cargo to-be-shifted  30  by means of the fixed connection bolt  13 , and the rotary screw  11  is in threaded connection with the other end of the lifting and fixing bracket  12 . Further, the lifting and fixing bracket  12  comprises a threaded sleeve  121  and a bracket body  122 . The bracket body  122  extends outward and obliquely downward along an outer wall face of the threaded sleeve  121 , and the rotary screw  11  is mounted to the threaded sleeve  121  to create a rotary motion that drives a bearing of the moving device  20  to rotate. The moving device  20  herein is preferably a universal wheel. 
     In addition, the lifting and fixing bracket  12  is further provided with reinforcing ribs  123 , and the reinforcing ribs  123  are disposed on two sides of the bracket body  122 . The reinforcing ribs  123  surround the threaded sleeve  121  and an outer side wall of the bracket body  122 . A lower end of the bracket body  122  is provided with a mounting table  124 , and the mounting table  124  is connected to the cargo to-be-shifted  30  by means of the fixed connection bolt  13 . 
     Further, two sides of the mounting table  124  are provided with side plates  125 , and the side plates  125  are connected between the lower end of the bracket body  122  and the mounting table  124 . 
     According to the above structural description, the movable-type lifting device of the present invention utilizes a lifting and fixing device  10  and a moving device  20 , with a bolted coupling being used therebetween. The lifting and fixing device  10  comprises a rotary screw  11 , a lifting and fixing bracket  12  and a fixed connection bolt  13 . The fixing bracket  12  and an cargo to-be-shifted are fixed by a detachable fixed connection bolt  13 , so that the lifting and fixing bracket  12  and the cargo to-be-shifted form a unitary whole. The rotary screw  11  interacts with the threads of the threaded sleeve  121  and drives the bearing of the shifting device  20  to rotate, thereby converting the rotary motion of the rotary screw  11  into a linear motion so as to lift the cargo to-be-shifted  30 . 
     With the movable-type lifting device of the present invention, the lifting and fixing device  10  and the floor scale are envisaged as a unitary whole. By way of rotating the fixed connection bolt  13 , a rotary motion between the rotating fixed connection bolt  13  and the lifting and fixing bracket  12  is converted into linear motion that induces the floor scale to rise. The lifting and fixing bracket  12  is connected to the shifting device  20 , so that after the floor scale rises above the ground, the floor scale can be easily shifted. Based on the weighing capacity, i.e., the size, of the floor scale, the required number, generally 2 sets or 4 sets, of movable-type lifting devices can be employed. 
     In summary, the movable-type lifting device of the present invention is capable of performing the functions of lifting and shifting without the need for equipment such as forklift, a traveling crane and the like. It has a simple and small structure, and can perform lifting and shifting anytime and anywhere when used, effectively reducing the labor intensity for handling, thus saving valuable manpower, material resources and costs. 
     While a particular embodiment of the present invention is described above, a person skilled in the art should understand that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Various alterations or modifications can be made by a person skilled in the art to these embodiments without departing from the principle and substance of the present invention. However, these alterations and modifications all fall within the scope of protection of the present invention. 
     REFERENCE SIGNS LIST 
     lifting and fixing device  10   
     moving device  20   
     cargo to be shifted  30   
     rotary screw  11   
     lifting and fixing bracket  12   
     fixed connection bolt  13   
     threaded sleeve  121   
     bracket body  122   
     reinforcing rib  123   
     mounting table  124   
     side plate  125