Belt buckle and manufacturing method thereof

Abstract

The belt buckle comprises a buckle body and two U-shaped nails, a buckle ring part is arranged in the middle of the buckle body, the buckle ring part comprises a base plate and a convex rib, the section of the buckle ring part is composed of a base plate section and a convex rib section, and the convex rib section is located in the middle of the upper side of the base plate section; nail plate parts are symmetrically arranged at the two ends of the buckle body, each nail plate part is composed of an extending part of the buckle ring part and two wing parts, the cross section of each nail plate part is composed of the cross section of the buckle ring part and the cross sections of the two wing parts, and the cross sections of the two wing parts are symmetrically connected to the two sides of the cross section of a base plate in the cross section of the buckle ring part. When the belt buckle is in an unfolded state and a state of being connected with a conveying belt, the buckle body is completely symmetrical in all directions, so that when the belt buckle and the conveying belt bear tension load, the two nail feet on the buckle body, the stress positions of the nail feet and the stress of the buckle ring part in all directions are completely symmetrical, and the stress is uniform; and the service lives of the conveying belt and the belt buckle can be prolonged.

Description

Technical Field

[0001] The present invention relates to the field of machinery, in particular to a belt conveyor device, and more particularly to a belt buckle and a manufacturing method thereof. Background Art

[0002] Belt buckles are connecting devices used on conveyor belts, connecting belts to each other. They are widely used on conveyor belts in mines (particularly coal mines) to transport minerals over long distances. They are also widely used in other industries and situations requiring conveyor belts. Global demand for various belt buckles is approximately two to three billion pieces per year. Among all belt buckles, there are only a few that can carry heavy loads, and even fewer that are well-designed. Patent document CN105370796A discloses a conveyor belt fastener whose buckle, buckle ring, and nail holes are all asymmetrical. This causes the conveyor belt and belt buckle to be unevenly stressed when subjected to tension, subjecting them to the additional lateral force generated by the uneven stress and causing them to skew. This in turn damages the conveyor belt and belt buckle, shortening their service life. Summary of the Invention

[0003] The purpose of the present invention is to provide a belt buckle, which solves the technical problem of short service life of belt buckles in the prior art.

[0004] A belt buckle of the present invention comprises a buckle body and two U-shaped staples, each of the U-shaped staples having two staple legs. The buckle body is in an elongated strip shape, with a buckle ring portion being provided in the middle of the buckle body. The buckle ring portion comprises a base plate and a convex rib. The buckle ring portion is bent in a U-shape, with the convex rib located on the outside of the buckle ring portion after the U-shape bend. The base plate has a base plate cross-section, and the convex rib has a convex rib cross-section. The buckle ring portion comprises the base plate cross-section and the convex rib cross-section. The convex rib cross-section is located in the middle of the upper side of the base plate cross-section. The base plate cross-section is rectangular, and the width of the convex rib cross-section is smaller than that of the base plate cross-section. The upper portion of the convex rib cross-section is a rectangle with rounded corners on both sides, and the two sides of the lower portion of the convex rib cross-section are symmetrically connected to the two sides of the base plate cross-section via an inwardly concave arc.

[0005] The two ends of the buckle body are symmetrically provided with nail plate parts, each of which is composed of an extension of the buckle part in its length direction and two wings symmetrically arranged on the front and rear sides thereof. The cross section of the nail plate part is composed of the cross section of the buckle part and the cross section of the two wings, and the cross sections of the two wings are symmetrically connected on both sides of the base cross section;

[0006] Each wing is provided with two nail holes, which are arranged along the length of the buckle body, and the nail holes in the front and rear wings are symmetrical;

[0007] The outer end surfaces of the two nail plate parts are symmetrically arranged as inclined surfaces, and the inclined surfaces at both ends of the buckle body after bending are extended and intersect at the outer side of the opening of the buckle body;

[0008] The nail feet of the two U-shaped nails are respectively inserted into the two nail holes in the front and rear wings of one nail plate part and point to the other nail plate part.

[0009] Furthermore, the cross section of any wing portion is kidney-shaped, with the distal end thereof facing the cross section of the rib.

[0010] The present invention also provides a method for manufacturing the above-mentioned belt buckle, including a step of extruding steel into a long strip and cutting it according to a set length to obtain an original buckle body, the cross-sectional shape of the long strip being the cross-sectional shape of the nail plate portion, and after the step of obtaining the original buckle body is completed, the original buckle body is trimmed and punched, and in the trimming and punching steps, the front and rear wings of the middle part of the original buckle body are symmetrically cut off to form a buckle portion, and the original buckle bodies connected at both ends of the buckle portion respectively form nail plate portions, and the nail plate portions are symmetrical on the left and right, and two nail holes are punched out at symmetrical positions in the front and rear wings of any nail plate portion, and the two nail holes are arranged parallel to the length direction of the original buckle body, and the nail holes in the two nail plate portions are symmetrical on the left and right, and after the trimming and punching steps are completed, a bevel is processed at the left end of the left nail plate portion and the right end of the right nail plate portion, and finally the buckle portion is bent into a U shape.

[0011] Compared with the prior art, the present invention has a positive and obvious effect. When the belt buckle is in the unfolded state and connected to the conveyor belt, the buckle body is completely symmetrical in front, back, left, and right directions. This allows the belt buckle and the conveyor belt to bear tensile loads. The two nail feet on the buckle body have their force positions completely symmetrical with the upper, lower, left, and right forces of the buckle part, so that the forces are evenly distributed in opposite directions, which can improve the service life of the conveyor belt and the belt buckle. In addition, before the buckle part is trimmed, bent, and punched at both ends, the cross-sectional shape of the entire buckle body is equal. The two sides of the middle part of the buckle body are trimmed to form a trimming groove. After bending, the buckle part is naturally formed. In this way, there is no need to perform curling or folding on the buckle after trimming. This has the advantage of ensuring consistency in mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a first stereoscopic schematic diagram of a belt buckle of the present invention.

[0013] Figure 2 The figure is a front view of a belt buckle of the present invention.

[0014] Figure 3 This is a second stereoscopic schematic diagram of a belt buckle of the present invention.

[0015] Figure 4The figure is a side view of a belt buckle of the present invention.

[0016] Figure 5 The figure is a top view of a belt buckle according to the present invention.

[0017] Figure 6 The figure is a bottom view schematically showing a belt buckle in an unfolded state according to the present invention.

[0018] Figure 7 The figure is a front view schematic diagram of a belt buckle in an unfolded state according to the present invention.

[0019] Figure 8 The figure is a side view schematic diagram of a belt buckle in an unfolded state according to the present invention.

[0020] Figure 9 The figure is a top view of a belt buckle in an unfolded state according to the present invention.

[0021] Figure 10 for Figure 7 AA cross-sectional view of .

[0022] Figure 11 for Figure 7 BB cross-sectional diagram.

[0023] Figure 12 for Figure 7 Schematic diagram of CC cross-section.

[0024] Figure 13 The figure is a three-dimensional schematic diagram of a belt buckle in use according to the present invention.

[0025] Figure 14 The figure is a top view of a belt buckle of the present invention in use.

[0026] Figure 15 The present invention is a front view schematic diagram of a belt buckle in use.

[0027] Figure 16 The present invention is a front cross-sectional schematic diagram of a belt buckle in use.

[0028] Figure 17 The figure is a side view schematic diagram of a belt buckle in use according to the present invention.

[0029] Figure 18 The present invention is a side cross-sectional schematic diagram of a belt buckle in use. DETAILED DESCRIPTION

[0030] The present invention is further described below with reference to an embodiment. However, the present invention is not limited to these embodiments. Any similar structure and similar variations of the present invention should be included in the scope of protection of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and does not limit the technical solution of the present invention.

[0031] like Figures 1-18 As shown, a belt buckle of the present invention includes a buckle body and two U-shaped staples 4, each of the U-shaped staples 4 has two staple feet 5, the buckle body is in the shape of an elongated strip, the middle part of the buckle body is provided with a buckle portion 6, the buckle portion 6 includes a base plate 1 and a convex rib 2, the buckle portion 6 is U-shaped bent, the convex rib 2 is located on the outside of the buckle portion 6 after the U-shaped bend, the cross section of the base plate 1 is a base plate cross section 12, the cross section of the convex rib 2 is a convex rib cross section 13, the cross section of the buckle portion 6 is composed of the base plate cross section 12 and the convex rib cross section 13, the convex rib cross section 13 is located in the middle of the upper side of the base plate cross section 12, the base plate cross section 12 is rectangular, the width of the convex rib cross section 13 is smaller than the width of the base plate cross section 12, the upper part of the convex rib cross section 13 is a rectangle with rounded corners 8 on both sides, and the two sides of the lower part of the convex rib cross section 13 are symmetrically connected to the two sides of the base plate cross section 12 through an inward concave arc 9;

[0032] The two ends of the buckle body are symmetrically provided with nail plate parts. Each of the nail plate parts is composed of the extension of the buckle part 6 in its length direction and the two wings 14 symmetrically provided on the front and rear sides. The cross section of the nail plate part is composed of the cross section of the buckle part 6 and the cross section of the two wings 14. The cross sections of the two wings 14 are symmetrically connected on both sides of the base cross section 12.

[0033] Each wing 14 is provided with two nail holes 3, and the two nail holes 3 are arranged along the length direction of the buckle body, and the nail holes 3 in the front and rear wings 14 are symmetrical;

[0034] The outer end surfaces of the two nail plate parts are symmetrically arranged as inclined surfaces 10, and the inclined surfaces 10 at both ends of the bent buckle body are extended and intersect at the outer side of the opening of the buckle body;

[0035] The nail feet 5 of the two U-shaped nails 4 are respectively inserted into the two nail holes 3 in the front and rear wings 14 of one nail plate part, and point to the other nail plate part.

[0036] Furthermore, the cross section of any wing portion 14 is kidney-shaped, with the distal end thereof facing the rib cross section 13 .

[0037] The present invention also provides a method for manufacturing the above-mentioned belt buckle, including a step of extruding steel into a long strip and cutting it according to a set length to obtain an original buckle body, the cross-sectional shape of the long strip being the cross-sectional shape of the nail plate portion, and after the step of obtaining the original buckle body is completed, the original buckle body is trimmed and punched, and in the trimming and punching steps, the front and rear wings of the middle part of the original buckle body are symmetrically cut off to form a buckle portion 6, and the original buckle bodies connected at both ends of the buckle portion form nail plate portions respectively, and the nail plate portions are symmetrical on the left and right, and two nail holes 3 are punched out at symmetrical positions in the front and rear wings of any nail plate portion, and the two nail holes 3 are arranged parallel to the length direction of the original buckle body, and the nail holes 3 in the two nail plate portions are symmetrical on the left and right, and after the trimming and punching steps are completed, a bevel 10 is processed at the left end of the left nail plate portion and the right end of the right nail plate portion, and finally the buckle portion 6 is bent into a U shape.

[0038] Specifically, the extrusion, trimming, punching, punching, beveling and bending methods all adopt mechanical processing methods in the prior art.

[0039] The working principle of this embodiment is as follows:

[0040] like Figure 1 、 Figure 12 As shown, when the belt buckle is in the unfolded state and in the state connected to the conveyor belt, the buckle body is completely symmetrical in front, back, left and right. When the belt buckle and the conveyor belt are subjected to tensile loads, the two U-shaped nails 4 (four nail feet 5, eight nail holes 3) on the buckle body have their force positions completely symmetrically distributed with the upper, lower, left and right forces of the buckle part 6 (at the flexible shaft 11). The forces are evenly distributed and in opposite directions, which can improve the service life of the conveyor belt and the belt buckle.

[0041] Furthermore, before the buckle ring 6 is trimmed, bent, and punched at both ends, the buckle body has a uniform cross-sectional shape throughout. Trimming is performed on both sides of the buckle body's center to form trimming grooves 7. After bending, the buckle ring 6 is naturally formed. This eliminates the need for further curling or folding at the buckle ring after trimming, ensuring consistent mechanical properties.

[0042] The unique shape design of the buckle portion 6 is a comprehensive consideration of the rationality of the buckle assembly, as well as the rationality of the buckle portion 6 and the two conveyor belts docking, etc., as described in detail below.

[0043] like Figure 12 As shown, when the left and right belt buckles are docked, the width of the rib 2 is smaller than the width of the base plate 1, and a rounded corner 8 and an inward concave arc 9 are provided to play a guiding role, so that the left and right buckle bodies can be docked and inserted more smoothly, reducing the assembly and connection time and reducing the on-site labor intensity.

[0044] like Figure 12As shown, after the belt buckle is connected to the conveyor belt, the wider part below the rib 2 (i.e., the base plate 1) contacts the flexible shaft 11, and the rib 2 is located on the other side of the buckle body and does not contact the flexible shaft 11. The width of the base plate 1 is greater than the width of the rib 2, which can increase the contact area of ​​the flexible shaft 11, reduce the contact pressure between the buckle body and the flexible shaft 11, and extend the service life of the product.

[0045] At the same time, the design of being narrow at the top and wide at the bottom, that is, the width of the base plate 1 is greater than the width of the rib 2, can reduce the gap between the two belt buckles after they are docked and inserted, thereby effectively reducing the leakage of coal dust at this point.

[0046] The narrow-at-top, wide-at-bottom design easily adapts to the deformation requirements of the conveyor belt during operation. Because the cross-section of a conveyor belt loaded with coal or other minerals, running on the carrier rollers, resembles the inverted trapezoidal shape of a riverbed, or a concave arc. Therefore, the belt buckles installed on the conveyor belt are arranged along an inverted trapezoidal shape (or arc). This narrow-at-top, wide-at-bottom design effectively avoids or minimizes damage caused by compression between buckles.

[0047] The ribs 2 on the belt buckle make the entire buckle body less susceptible to wear during the operation of the conveyor belt, effectively extending the service life of the product.

[0048] The buckle surface transitions to the belt surface through the inclined surface 10, which reduces various impacts and possible scratching and pulling when the belt passes through rollers and drums during operation. At the same time, it also reduces the scratching damage to the belt cleaner caused by the belt buckle and reduces operating noise.

Claims

1. A belt buckle, characterized by: The buckle body comprises a buckle body and two U-shaped nails, each of the U-shaped nails has two nail feet, the buckle body is in the shape of an elongated strip, the middle part of the buckle body is set as a buckle ring part, the buckle ring part comprises a base plate and a convex rib, the buckle ring part is U-shaped, the convex rib is located on the outside of the buckle ring part after the U-shaped bending, the cross section of the base plate is the base plate cross section, the cross section of the convex rib is the convex rib cross section, the cross section of the buckle ring part is composed of the base plate cross section and the convex rib cross section, the convex rib cross section is located in the middle of the upper side of the base plate cross section, the base plate cross section is rectangular, the width of the convex rib cross section is smaller than the width of the base plate cross section, the upper part of the convex rib cross section is a rectangle with rounded corners on both sides, and the two sides of the lower part of the convex rib cross section are symmetrically connected to the two sides of the base plate cross section through an inward concave arc; The two ends of the buckle body are symmetrically provided with nail plate parts, each of which is composed of an extension of the buckle part in its length direction and two wings symmetrically arranged on the front and rear sides thereof. The cross section of the nail plate part is composed of the cross section of the buckle part and the cross section of the two wings, and the cross sections of the two wings are symmetrically connected on both sides of the base cross section; Each wing is provided with two nail holes, which are arranged along the length of the buckle body, and the nail holes in the front and rear wings are symmetrical; The outer end surfaces of the two nail plate parts are symmetrically arranged as inclined surfaces, and the inclined surfaces at both ends of the buckle body after bending are extended and intersect at the outer side of the opening of the buckle body; The nail feet of the two U-shaped nails are respectively inserted into the two nail holes in the front and rear wings of one nail plate part and point to the other nail plate part.

2. The belt buckle according to claim 1, characterized in that: The cross section of any wing is kidney-shaped, with the distal end facing the rib cross section.

3. A method for manufacturing the belt buckle according to claim 1, characterized in that: The invention comprises the steps of extruding steel into a long strip and cutting it into a set length to obtain an original buckle body, wherein the cross-sectional shape of the long strip is the cross-sectional shape of the nail plate part. After the step of obtaining the original buckle body is completed, the original buckle body is trimmed and punched. In the trimming and punching steps, the front and rear wings of the middle part of the original buckle body are symmetrically cut off to form a buckle part. The original buckle bodies connected at both ends of the buckle part respectively form nail plate parts. The nail plate parts are symmetrical on the left and right. Two nail holes are punched out at symmetrical positions in the front and rear wings of any nail plate part. The two nail holes are arranged parallel to the length direction of the original buckle body. The nail holes in the two nail plate parts are symmetrical on the left and right. After the trimming and punching steps are completed, an inclined surface is processed at the left end of the left nail plate part and the right end of the right nail plate part. Finally, the buckle part is bent into a U shape.

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