Welding device for circular pu conveyor belts
Patent Information
- Application Number
- CN202522516707.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-27
AI Technical Summary
[0003]目前在熔接圆形PU传动带的两端时存在摩擦熔接、热力加热然后带动两端相互靠近挤压来熔接，但采用上述的方式熔接圆形PU传动带后，其连接的位置容易出现熔接形成的多余物，同时在熔接的时候也会缩短圆形PU传动带的长度，从而导致圆形PU传动带的整体长度，导致圆形PU传动带无法做到精准长度的连接，同时当圆形PU传动带长度较短时，也无法进行短距离的补救，从而造成整根圆形PU传动带无法使用
该圆形PU传送带的熔接装置中，通过设置的底座和压架将圆形PU传动带的两端对齐并固定住位置，然后通过热风枪对中压槽位置暴露出来的圆形PU传动带进行加热，当圆形PU传动带融化后，通过压件对底放槽中融化的圆形PU传动带进行挤压，使融化的圆形PU传动带进行塑形，进而做到圆形PU传动带的连接，采用此种方式可以避免在熔接圆形PU传动带时缩短其长度，做到精准尺寸的连接，提高圆形PU传动带熔接的准确性，同时在压件对融化的圆形PU传动带进行按压时，可以将多余的圆形PU传动带进行挤压向外溢出，减少PU材料和熔接好的圆形PU传动带之间连接的面积，以便于后续将多余的材料去除。
Smart Images
Figure CN224827761U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PU conveyor belt welding technology, specifically to a welding device for circular PU conveyor belts. Background Technology
[0002] Circular PU drive belts, also known as PU round synchronous belts, are annular drive belts made of polyurethane. They play a vital role in industrial transmission systems, boasting excellent performance and a wide range of applications. A circular PU drive belt is a circular structure formed by joining rod-shaped PU materials end-to-end, its primary function being to transmit power and transport materials. It can adapt to various complex working environments, ensuring the efficient operation of the transmission system. The most significant characteristic of this type of drive belt lies in its material—polyurethane—which gives the synchronous belt excellent wear resistance and fatigue resistance, maintaining good performance even in high or low temperature environments. Furthermore, PU round synchronous belts possess excellent flexibility and elasticity, allowing them to maintain stable transmission efficiency even at high speeds.
[0003] Currently, when welding the two ends of a circular PU conveyor belt, there are methods such as friction welding and heating to bring the two ends closer together for welding. However, after welding the circular PU conveyor belt using the above methods, excess material is easily formed at the connection point. At the same time, the length of the circular PU conveyor belt is shortened during welding, resulting in an overall length of the circular PU conveyor belt. This makes it impossible to achieve a precise length connection of the circular PU conveyor belt. In addition, when the length of the circular PU conveyor belt is too short, it is impossible to make short-distance repairs, thus rendering the entire circular PU conveyor belt unusable. Summary of the Invention
[0004] The purpose of this invention is to provide a welding device for circular PU conveyor belts to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides a welding device for a circular PU conveyor belt, including a base. A pressure frame is provided on the upper side of the base. The base and the pressure frame clamp and fix the two ends of the circular PU conveyor belt. The base includes a receiving plate, and a bottom groove is formed on the upper side of the receiving plate. The pressure frame includes a pressure plate, and an upper pressure groove is formed on the lower side of the pressure plate. The bottom groove and the upper pressure groove are combined in a space with the same size and shape as the circular PU conveyor belt. The two ends of the circular PU conveyor belt are set in the space formed by the bottom groove and the upper pressure groove. A middle pressure groove is formed in the middle of the upper side of the pressure plate, penetrating the lower side wall of the pressure plate. The two ends of the circular PU conveyor belt are in contact with each other and located inside the middle pressure groove. A pressing element is provided inside the middle pressure groove. After the circular PU conveyor belt is heated by a hot air gun, the pressing element presses the melted circular PU conveyor belt in the middle pressure groove to shape the melted circular PU conveyor belt.
[0006] As a further improvement to this technical solution, the pressing component includes a pressing block with the same shape as the intermediate pressing groove. The pressing block is slidably disposed in the intermediate pressing groove, and its sidewall is in slidable contact with the sidewall of the intermediate pressing groove. An upper pressing groove is opened on the lower side of the pressing block, and a pressing rod is fixed on the upper side of the pressing block.
[0007] As a further improvement to this technical solution, the intermediate pressure groove is opened directly above the bottom placement groove, and the width of the intermediate pressure groove is greater than the diameter of the bottom placement groove. When the pressure block presses the circular PU conveyor belt, the lower side of the pressure block contacts the upper side wall of the receiving plate.
[0008] As a further improvement to this technical solution, the bottom of the pressure plate is symmetrically fixed with limiting blocks, and the upper part of the receiving plate and the position corresponding to the limiting blocks are provided with matching limiting grooves, and one end of the limiting block is slidably inserted into the limiting groove.
[0009] As a further improvement to this technical solution, the pressure plate is provided with column grooves symmetrically opened on the left and right side walls. A limiting post fixed to the side wall of the receiving plate is provided in the column groove. The upper end of the limiting post passes through the column groove and is threaded with a nut. When the nut is tightened, the pressure plate is fixed to the receiving plate.
[0010] As a further improvement to this technical solution, soft rubber blocks are fixed on both sides of the pressure plate, and an upper pressure groove is also provided on the lower side of the soft rubber block. The end of the soft rubber block away from the pressure plate is inclined downward. During the process of the pressure plate being fixed on the receiving plate, the lower side of the soft rubber block is gradually pressed and becomes flat, and the soft rubber block fixes the circular PU conveyor belt in the bottom groove.
[0011] As a further improvement to this technical solution, an overflow groove is provided on the opposite side wall of the pressure block. The overflow groove is located directly above the bottom groove and runs through the top and bottom of the pressure block. When the pressure block squeezes the melted circular PU conveyor belt, the excess circular PU material overflows from the overflow groove.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In this circular PU conveyor belt welding device, the two ends of the circular PU conveyor belt are aligned and fixed in position by a base and a pressure frame. Then, a hot air gun heats the circular PU conveyor belt exposed in the middle pressure groove. After the circular PU conveyor belt melts, the pressure component squeezes the melted circular PU conveyor belt in the bottom groove to shape it, thereby connecting the circular PU conveyor belts. This method can avoid shortening the length of the circular PU conveyor belt during welding, achieving a precise dimensional connection and improving the accuracy of the circular PU conveyor belt welding. At the same time, when the pressure component presses the melted circular PU conveyor belt, excess circular PU conveyor belt can be squeezed outwards, reducing the connection area between the PU material and the welded circular PU conveyor belt, so as to facilitate the subsequent removal of excess material. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the assembly structure of the base and the pressure frame of the utility model. Figure 3 This is a schematic diagram of the base structure of the utility model; Figure 4 This is a schematic diagram of the pressure frame structure of the utility model; Figure 5 This is a schematic diagram of the pressing structure of the utility model; Figure 6 This is a schematic diagram of the overall cross-sectional structure of the utility model.
[0014] The meanings of the labels in the diagram are as follows: 1. Base; 11. Support plate; 12. Bottom groove; 13. Limiting groove; 14. Limiting post; 15. Nut; 2. Pressure frame; 21. Pressure plate; 22. Soft rubber block; 23. Upper pressure groove; 24. Middle pressure groove; 25. Limiting block; 26. Column groove; 3. Pressing element; 31. Pressing block; 32. Overflow groove; 33. Pressing rod. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0017] Example 1. Please refer to Example 1. Figures 1-6 As shown, this embodiment provides a welding device for a circular PU conveyor belt, including a base 1. A pressure frame 2 is provided on the upper side of the base 1. The base 1 and the pressure frame 2 clamp and fix the two ends of the circular PU conveyor belt. The base 1 includes a receiving plate 11, which is fixed to the worktable by screws. A bottom groove 12 is provided on the upper side of the receiving plate 11. The diameter of the bottom groove 12 is the same as the diameter of the circular PU conveyor belt to be welded. The cross-section of the bottom groove 12 is semi-circular. The pressure frame 2 includes a pressure plate 21. An upper pressure groove 23 is provided on the lower side of the pressure plate 21. The diameter of the upper pressure groove 23 is also the same as the diameter of the circular PU conveyor belt. The cross-section of the upper pressure groove 23 is also semi-circular. The space between the bottom groove 12 and the upper pressure groove 23 is the same as the size and shape of the circular PU conveyor belt. The two ends of the circular PU conveyor belt are set at the bottom groove 12. In the space formed by the groove 12 and the upper pressure groove 23, a middle pressure groove 24 is provided in the middle of the upper side of the pressure plate 21, which penetrates the lower side wall of the pressure plate 21. The middle pressure groove 24 is located directly above the bottom placement groove 12. The two ends of the circular PU conveyor belt are in contact with each other and located inside the middle pressure groove 24. A pressure member 3 is provided inside the middle pressure groove 24. After the circular PU conveyor belt is heated by the hot air gun, the circular PU conveyor belt in the middle pressure groove 24 will soften and melt together. Then, the pressure member 3 presses the melted circular PU conveyor belt in the middle pressure groove 24, so that the two ends of the softened circular PU conveyor belt are squeezed together, thereby achieving the welding of the circular PU conveyor belt. At the same time, the pressing of the pressure member 3 can also shape the melted circular PU conveyor belt and restore it to its original shape.
[0018] The pressing component 3 includes a pressing block 31 with the same shape as the intermediate pressure groove 24. The pressing block 31 is slidably disposed in the intermediate pressure groove 24, and its sidewall is in sliding contact with the sidewall of the intermediate pressure groove 24. An upper pressing groove 23 is provided on the lower side of the pressing block 31, and a pressing rod 33 is fixed on the upper side of the pressing block 31. By pressing the pressing rod 33, the operator causes the pressing rod 33 to drive the pressing block 31 to press the melted circular PU conveyor belt in the intermediate pressure groove 24, so that the melted circular PU conveyor belt can be welded at both ends and shaped.
[0019] To ensure precise welding of both ends of the circular PU conveyor belt and avoid unstable welding due to insufficient PU material, some PU material can be added when heating the circular PU conveyor belt with a hot air gun. This will result in a greater amount of melted circular PU material. An overflow groove 32 is provided on the opposite side wall of the pressure block 31, located directly above the bottom groove 12 and extending through the top and bottom of the pressure block 31. When the pressure block 31 presses the melted circular PU conveyor belt, the excess circular PU material overflows from the overflow groove 32. This design ensures that the circular PU conveyor belt will not deviate from its circular shape due to insufficient PU material during welding. At the same time, the connection area between the PU material overflowing from the overflow groove 32 and the circular PU conveyor belt is smaller than that of friction welding or heat-pressurized welding, making it easier for subsequent workers to remove excess PU material.
[0020] This method effectively maintains the length of the circular PU conveyor belt, thereby improving the accuracy of the welding dimensions of the circular PU conveyor belt. It can also achieve accurate welding in some high-precision scenarios.
[0021] To avoid over-pressing of the pressing block 31 when pressing the melted circular PU conveyor belt, the width of the middle pressing groove 24 is designed to be greater than the diameter of the bottom placement groove 12. That is, the middle pressing groove 24 can expose part of the receiving plate 11 on both sides of the bottom placement groove 12. When the pressing block 31 presses the circular PU conveyor belt, the lower side of the pressing block 31 contacts the upper side wall of the receiving plate 11. Through the contact between the pressing block 31 and the receiving plate 11, the receiving plate 11 blocks the pressing block 31 from moving further down, thereby ensuring that the upper pressing groove 23 on the pressing block 31 and the bottom placement groove 12 form a complete circle.
[0022] To ensure accurate positioning between the pressure plate 21 and the receiving plate 11, limit blocks 25 are symmetrically fixed to the bottom of the pressure plate 21. A matching limit groove 13 is provided on the upper part of the receiving plate 11 corresponding to the limit block 25. One end of the limit block 25 is slidably inserted into the limit groove 13. Simultaneously, column grooves 26 are symmetrically provided on the left and right sidewalls of the pressure plate 21. Limiting posts 14, fixed to the upper sidewall of the receiving plate 11, are installed in the column grooves 26. The upper end of the limiting post 14 passes through the column groove 26 and is threaded with a nut 15. When the pressure frame 2 is needed to convey the circular PU placed in the bottom groove 12... When clamping and fixing the end, align the positions of several column grooves 26 and several limiting posts 14, and then place the pressure plate 21 downwards so that several limiting posts 14 are inserted into the corresponding column grooves 26. During the descent of the pressure plate 21, one end of the limiting block 25 is inserted into the limiting groove 13. Through the restriction of the position of the column grooves 26 by several limiting posts 14, and the insertion and cooperation of the limiting groove 13 and the limiting block 25, the pressure plate 21 is placed and fixed in the position of the receiving plate 11. Then, the nut 15 is threaded onto the limiting post 14. When the nut 15 is tightened, the pressure plate 21 is fixed on the receiving plate 11.
[0023] During use, the operator inserts both ends of the circular PU conveyor belt from the bottom placement groove 12 into the lower part of the intermediate pressure groove 24, and then tightens the nuts 15 one by one to fix the pressure plate 21 onto the receiving plate 11. At this time, the two ends of the circular PU conveyor belt are fixed between the bottom placement groove 12 and the upper pressure groove 23 by the clamping of the pressure plate 21 and the receiving plate 11. Then, the operator aims the outlet of the hot air gun at the intermediate pressure groove 24 to heat the circular PU conveyor belt in the intermediate pressure groove 24. After the two ends of the circular PU conveyor belt melt, the operator puts a portion of PU material into the intermediate pressure groove 24 and then heats it to melt. After the PU material melts... The worker places the pressure block 31 into the intermediate pressure groove 24, and then presses down the pressure rod 33, causing the pressure block 31 to squeeze the molten PU material in the intermediate pressure groove 24. The squeezed PU material will be shaped between the limiting groove 13 and the upper pressure groove 23, and some of it will overflow from the overflow groove 32. This method can improve the welding effect of the circular PU conveyor belt and also ensure the accuracy of the welding size of the circular PU conveyor belt. The overflow groove 32 can squeeze the excess circular PU conveyor belt outward, reducing the connection area between the PU material and the welded circular PU conveyor belt, so that the excess material can be removed later.
[0024] When a circular PU conveyor belt is missing a small section of length, such as within a distance less than the length of the medium pressure groove 24 (ideally no more than 3 cm), this device can be used to fill the gap. In use, adjust the distance between the two ends of the circular PU conveyor belt, then place a suitable length of circular PU conveyor belt between them. Heat the belt with a hot air gun, then place some PU material on top, heat it again to melt it, and finally press it with a pressure block 31. This method can fill in missing sections of the circular PU conveyor belt, preventing complete waste due to a short gap and reducing maintenance costs.
[0025] Example 2. To further improve the stability of the receiving plate 11 and pressure plate 21 in clamping the end of the circular PU conveyor belt, soft rubber blocks 22 are fixed on both sides of the pressure plate 21, and an upper pressure groove 23 is also provided on the lower side of the soft rubber blocks 22. The end of the soft rubber blocks 22 away from the pressure plate 21 is inclined downward. During the process of the pressure plate 21 being fixed on the receiving plate 11, the soft rubber blocks 22, the upper side of the receiving plate 11, and the circular PU conveyor belt placed in the bottom placement groove 12 come into contact. As the soft rubber blocks 22 move downward, the worker pushes the circular PU conveyor belt by hand to ensure that the position of the circular PU conveyor belt does not shift. The continuous downward movement of the soft rubber blocks 22 is blocked by the receiving plate 11, so that the lower side of the soft rubber blocks 22 is gradually pressed and flattened. During the horizontal change of the soft rubber blocks 22, the end of the circular PU conveyor belt is pressed and covered, so that the soft rubber blocks 22 fix the circular PU conveyor belt in the bottom placement groove 12, thereby enhancing the stability of the end of the circular PU conveyor belt being fixed.
[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A welding device for a circular PU conveyor belt, comprising a base (1), characterized in that: A pressure frame (2) is provided on the upper side of the base (1). The base (1) and the pressure frame (2) clamp and fix the two ends of the circular PU conveyor belt. The base (1) includes a receiving plate (11). A bottom groove (12) is opened on the upper side of the receiving plate (11). The pressure frame (2) includes a pressure plate (21). An upper pressure groove (23) is opened on the lower side of the pressure plate (21). The bottom groove (12) and the upper pressure groove (23) are combined to form a space with the same size and shape as the circular PU conveyor belt. The two ends of the circular PU conveyor belt are... The end is set in the space formed by the bottom groove (12) and the upper pressure groove (23), and a middle pressure groove (24) is opened in the middle of the upper side of the pressure plate (21) to penetrate the lower side wall of the pressure plate (21). The two ends of the circular PU conveyor belt are in contact with each other and located inside the middle pressure groove (24). A pressure member (3) is provided inside the middle pressure groove (24). After the circular PU conveyor belt is heated by the hot air gun, the pressure member (3) presses the melted circular PU conveyor belt in the middle pressure groove (24) to shape the melted circular PU conveyor belt.
2. The welding device for a circular PU conveyor belt according to claim 1, characterized in that: The pressure component (3) includes a pressure block (31) with the same shape as the middle pressure groove (24). The pressure block (31) is slidably disposed in the middle pressure groove (24), and its side wall is in sliding contact with the side wall of the middle pressure groove (24). An upper pressure groove (23) is provided on the lower side of the pressure block (31), and a pressure rod (33) is fixed on the upper side of the pressure block (31).
3. The welding device for a circular PU conveyor belt according to claim 2, characterized in that: The intermediate pressure groove (24) is located directly above the bottom placement groove (12), and the width of the intermediate pressure groove (24) is greater than the diameter of the bottom placement groove (12). When the pressure block (31) presses the circular PU conveyor belt, the lower side of the pressure block (31) contacts the upper side wall of the receiving plate (11).
4. The welding device for a circular PU conveyor belt according to claim 3, characterized in that: The bottom of the pressure plate (21) is symmetrically fixed with limiting blocks (25). The upper part of the receiving plate (11) and the corresponding position of the limiting block (25) are provided with matching limiting grooves (13). One end of the limiting block (25) is slidably inserted into the limiting groove (13).
5. The welding device for a circular PU conveyor belt according to claim 4, characterized in that: The pressure plate (21) has symmetrically arranged column grooves (26) on the left and right side walls. A limiting post (14) fixed to the upper side wall of the receiving plate (11) is provided in the column groove (26). The upper end of the limiting post (14) passes through the column groove (26) and is threaded with a nut (15). When the nut (15) is tightened, the pressure plate (21) is fixed on the receiving plate (11).
6. The welding device for a circular PU conveyor belt according to claim 2, characterized in that: Both sides of the pressure plate (21) are fixed with soft rubber blocks (22), and the lower side of the soft rubber block (22) is also provided with an upper pressure groove (23). The end of the soft rubber block (22) away from the pressure plate (21) is inclined downward. During the process of the pressure plate (21) being fixed on the receiving plate (11), the lower side of the soft rubber block (22) is gradually pressed and becomes flat, and the soft rubber block (22) fixes the circular PU conveyor belt in the bottom groove (12).
7. The welding device for a circular PU conveyor belt according to claim 2, characterized in that: An overflow groove (32) is provided on the opposite side wall of the pressure block (31). The overflow groove (32) is located directly above the bottom groove (12) and extends through the top and bottom of the pressure block (31). When the pressure block (31) squeezes the melted circular PU conveyor belt, the excess circular PU material overflows from the overflow groove (32).