Patent Application
20060261204
The invention relates to a lashing apparatus in the mechanical technical field, and more particularly to a tool for lashing goods on a vehicle.
The goods usually need to be lashed during transporting with a vehicle. It is not only inefficient but also strenuous to use the conventional nylon rope or steel rope to lash goods, and it is also difficult to lash these goods tightly. The lashing apparatus has been widely used at present, since it can lash and hold goods rapidly and conveniently.
A great lashing force is required for heavy goods to be transported. This is a challenge to the mechanical strength of the lashing apparatus. In practice, the lashing apparatus may be damaged while an excess force is applied on the strap during lashing the goods, wherein the reel is always the first part to be damaged. Therefore, the mechanical strength of the lashing apparatus can be most effectively enhanced by increasing the deformation resistance at reel.
However, the commonly used methods have some disadvantages in this aspect. If the size of the reel is enlarged, though the mechanical strength is enhanced, the cost will be increased; furthermore, for the products with the same scale, if the size of the reel is enlarged, that of other parts attached therewith, such as the ratchet wheel, will be correspondingly reduced, which will in turn impact the mechanical strength of said other parts. Efforts also have been made in making reels with high strength materials, but the manufacturing cost is increased accordingly, as is unfavorable for mass production and wide application. Due to the structural designs, the structure of the lashing apparatus tends to be more complicated in pursuit of high mechanical strength, which results in adverse effect on processing and use. Therefore, there is a need for a novel ratchet wheel to overcome the problems mentioned above.
An object of the invention is to provide a novel ratchet wheel of a lashing apparatus, so as to overcome the disadvantages of the poor mechanical strength at the reel in the current lashing apparatus, which improves the resistance to deformation of the ratchet wheel, and thereby improving the mechanical strength of the entire lashing apparatus.
Another object of the present invention is to provide a ratchet wheel of a lashing apparatus to address to the above-mentioned problems, which is easily implemented with a low cost and has a wide range of application. It overcomes the existing technical problems of the prior art that the use of high strength materials and the addition of manufacturing materials to enhance the strength of the ratchet wheel and the like results in a relatively high cost and makes it difficult to implement so that it is not suitable for wide application.
Yet another object of the present invention is to provide a ratchet wheel of a lashing apparatus to address the above-mentioned problems, which is suitable for the existing lashing apparatuses, easy to be reassembled and has a good compatibility. It solves the existing technical problems, such as poor economic efficiency and significant adjustment that has to be made to the lashing apparatus to improve the mechanical strength.
These objects of the present invention can be achieved by the following technical proposal. The ratchet wheel of the present invention comprises a wheel body which has ratchet teeth mounted on its outer edge. The wheel body has two shaft holes for the reel to pass through, and a supporting strip between the two shaft holes, wherein the supporting strip is fixed to the wheel body and protruded to one side of the wheel body. The reel is comprised of two semicircular winding shaft plates. After assembly, the supporting strip of the ratchet wheel is snapped between the two semicircular winding shaft plates, so as to function as a support. When a lashing apparatus is used to lash the goods, the tension of the strap will be applied on the semicircular winding shaft plates. As shown in
There may be various ways to connect the supporting strip to the wheel body. For example, said supporting strip and the wheel body is integrated through stamping. The stamped ratchet wheel is formed as an integral, which is easier to be assembled and processed. The material for making such a ratchet wheel is a metal material with good stretchability. Dies can be used in stamping, the structure of which generally comprises: an upper die and a lower die engaged with each other. A locking plate is arranged on the lower die for attaching the work pieces. At the head of the upper die there is a stamping concave head which has an arc shape. A stamping notch is provided on the lower die which matches with the stamping concave head of the upper die.
For another example, said supporting strip is fixed to the wheel body through one or more rivets or through one or more bolts. This can easily get much improvement relative to the conventional ratchet wheel, and the mechanical strength of the lashing apparatus will be obviously increased without replacing the parts.
For yet another example, said supporting strip is welded to the wheel body. By welding, the supporting strip will be kept away from loosening over long service time, while maintaining a fine compatibility with the existing device.
Still further, said supporting strip is wrapped around the wheel body through a metal sheet. More particularly, the metal sheet is wrapped around the supporting strip of the ratchet wheel.
Compared with the prior art, the advantage of the present invention is to improve the deformation resistance of the reel by changing the shape of the ratchet wheel, and thereby to enhance the mechanical strength of the lashing apparatus. Also, the product of the present structure requires a relatively small increase in cost but presents a significantly improved mechanical performance, compared with the conventional products. It is also safe and reliable with high use values.
As shown in
As shown in
One or more rods 861 can be provided herein. Accordingly, since the thru hole 811 and the spring 87 are used in match with the rod 861, the number of those should be equal.
The two side pieces 71 of the handle 7 have a slot B provided thereon accordingly, with both sides of the handhold 76 accommodated in the slot B respectively. The slot B has a length larger than that of the portion connecting the handhold and the slot B, so that the handhold 76 is moveable in the slot B. One end of the handhold 76 is engaged with the ratchet teeth 102 of the ratchet wheel 10. A draw ring 761 is provided at the other end of the handhold 76, and a return spring 77 is provided between the handhold 76 and the side piece 71.
The reel 3 is comprised of two semicircular winding shaft plates 31, with a ratchet wheel 10 arranged at each end. Said ratchet wheel 10 is arranged in the hinge area between the side plate 82 and the side piece 71. More particularly, two side plates 82 of the body 8 are muff-coupled to the reel 3, then the ratchet wheel 10 is muff-coupled to the outer sides of side plates 82, and then two side pieces 71 of the handle 7 are muff-coupled to the out sides of two ratchet wheels 10. The two ends of the two semicircular winding shaft plates 31 pass through the ratchet wheels 10 respectively, and are fixed together via pins 32, with the surfaces of said two semicircular winding shaft plates 31 facing each other. The pin 32 has an S-shape, and passes through the connection holes at the ends of the two semicircular winding shaft plates 31. The pin 32 functions to protect the parts muff-coupled to the semicircular winding shaft plates 31 from detaching therefrom.
As shown in
The ratchet wheel is formed by stamping, so the thickness of the ratchet wheel 101 is generally equal to that of the supporting strip 104. The space which the supporting strip 104 protrudes to the ratchet body 101 is between ½ and ⅘ in proportion to the thickness of the supporting strip 104 itself. The notch formed by stamping has a disc shape. The proportion of the diameter at the bottom of the notch is about ¼ to ⅖ to that of the opening. The diameter at opening of the notch is about half of the whole ratchet body 101 diameter. Two shaft holes 103 have symmetrically semicircular shape. The span of the semicircular hole accounts for about half of the whole ratchet body 101 diameter. Of course, not all the proportions of apparatus will be in said scope. Proportion deviation exists according to different materials and processes
In the present embodiment, the mechanical strength of the reel 3 is improved by shortening the space between the two supporting strips 104. The supporting strip 2 and the wheel body 10 are integrated directly by stamping according to the Embodiment 1. The structure and the process of this embodiment are simple, and thus high use value is achieved.
Firstly, the to-be-stamped work piece is put on the lower die 2 and is secured with the locking plate 3 in operating. Make sure the middle portion of the work piece is on the notch 21. Then, stamp the upper die 1 downwards into the shape for one time, control the stamping force and depth according to actual situation. The work piece will cracks if the force is exceed, while an under force can not press a enough protruded space on the supporting strip 104.
In order to have a well processing and manufacturing procedure, the whole ratchet wheel processes according to the embodiments are as following:
As shown in
The ends of the two side pieces 71 of the handle 7 where the hinge port 73 is provided have an arc shape. Steps 821 are arranged at the end of the two side plates 82 in the body 8, which have an arced top abutting upon the bayonet 822 for positioning the handhold. When unstrapping, the handhold 76 is raised to the top of the steps 821. The handhold 76 will slide along the arced top of steps 821 and get snapped when it reaches the bayonet 822, so that the handhold 76 is detached from the ratchet wheel 10. When the handhold 76 slides along the arced top of steps 821, the baffle 86 moves along the arced end of the two side pieces 71 of the handle 7, so that the baffle 86 is jacked up and detached from the ratchet wheel 10. In this way, the ratchet wheel can rotate freely, and the unstrapping of the reel 3 is realized.
As shown in the
As shown in
As shown in
As shown in
To sum up, the space between the supporting strips 104 of the two ratchet wheels 10 is shortened according to the present invention, thus the deformation resistance of the reel 3 is improved as well as the mechanical strength of the lashing apparatus.
Parts of the process according to Embodiment 1 are applied for the rest of the embodiments, such as the plate cutting, blanking, forming, heat treatment, barrel burnishing, and electroplating.
As shown in the
The embodiments described herein are only intended to exemplify the spirit of the present invention. Various modifications, supplementations and alterations to the embodiments disclosed will be apparent to those skilled in the art, without departing from the spirit and scope of the present invention as defined by the appended claims.
Although the terms such as body, ratchet wheel, handle, side piece and side plate are used herein, other terms may also be used. These terms are used only for clearly illustrating the nature of the present invention and shall not be understood as a limitation to the invention, which otherwise departs from the spirit of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 200510026070.5 | May 2005 | CN | national |
