Anti-rebound mechanism on chain roller

Abstract

This utility model discloses an anti-rebound mechanism for chain-type roller conveyors, relating to the field of chain-type roller conveyor technology. The utility model includes a sprocket with a chain meshing on it. A sliding shaft is inserted into the hollow part of the sprocket, driving the sprocket to move in either the X1 or X2 direction. A positioning plate is mounted on the sliding shaft, and the positioning plate has positioning teeth, each including a tooth groove and a tooth tip. An action plate and an outer tensioning structure are also included. The action plate includes a lower plate, and at least one upper ratchet is indirectly connected to the lower plate. At least one upper ratchet is inserted into one of the tooth grooves to position the positioning plate relative to the action plate. By setting up an outer tensioning structure, positioning teeth, and upper ratchet, along with other connecting and limiting components, this utility model makes the movement of the positioning teeth a unidirectional automated tensioning mechanism, reducing tooth skipping, reducing conveying noise, increasing the lifespan of high-efficiency conveyors, and also increasing the smoothness of the conveying process.

Description

Technical Field

[0001] This utility model relates to the field of chain roller conveyor technology, and specifically to an anti-rebound mechanism for chain roller conveyors. Background Technology

[0002] Chain-type roller conveyors are generally used in automated production lines to realize the automatic conveying of various pallets, workpieces, etc. It mainly consists of a drive end, a roller body, and a driven tensioning end. The function of the tensioning end is to keep the conveyor chain taut during the operation of the roller conveyor, so as to prevent the conveyor line from failing to operate normally due to insufficient chain tension.

[0003] Commonly used tensioning devices on the market are generally automatic spring tensioning devices without anti-rebound mechanisms. In actual use, when the conveyor roller motor suddenly starts or the load suddenly increases, the tension on the conveyor chain will suddenly increase sharply, and the pressure on the tension spring will also change accordingly. The tension spring will be compressed a long distance instantly, causing the sliding axis to move in the X2 direction. At this time, under the combined action of the tension spring force and the tension of the conveyor chain, the driven sprocket will reciprocate along the sliding groove and then quickly return to the initial position.

[0004] The entire process described above occurs almost instantaneously. From a macroscopic perspective, it means that the driven sprocket suddenly jumps along the sliding groove, causing the conveyor chain and driven sprocket to skip teeth instantly. The disadvantages of skipping teeth are that it will affect the lifespan of the chain and sprocket, and will also frequently cause abnormal noises during use. In addition, when a normal conveyor line is running, the chain will wobble and vibrate, resulting in poor conveying stability. Therefore, an anti-rebound mechanism on a chain-type roller conveyor is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problems that skipped teeth in the conveyor chain and driven sprocket can affect the lifespan of the chain and sprocket, and can also cause abnormal noises during use. In addition, the chain in a normal conveyor line will wobble and vibrate during normal operation, resulting in poor conveying stability. This invention provides an anti-rebound mechanism for chain-type roller conveyors.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] An anti-rebound mechanism for a chain-type roller conveyor includes a sprocket with a chain meshing on it. A sliding shaft is inserted into the hollow part of the sprocket, and the sliding shaft drives the sprocket to move in an X1 or X2 direction. A positioning plate is mounted on the sliding shaft and is located on one side of the sprocket. The positioning plate has a linear array of positioning teeth, each including a plurality of tooth grooves and a plurality of tooth tips. An actuating plate and an outer tensioning structure are also included. The outer tensioning structure at least indirectly connects the actuating plate and the positioning plate, and the outer tensioning structure moves the relative positions of the actuating plate and the positioning plate away from each other. The actuating plate includes a lower plate, and at least one upper ratchet is at least indirectly connected to the lower plate. The at least one upper ratchet is inserted into one of the tooth grooves to position the positioning plate relative to the actuating plate.

[0008] Furthermore, at least one upper ratchet is inserted into the tooth groove to a depth of 1 / 2 to 2 / 3 of the tooth tip height.

[0009] Furthermore, the upper ratchet includes a first tooth edge and a second tooth edge, the first tooth edge and the line connecting X1 to X2 have an angle of 90°-110° in the direction close to X1, and the second tooth edge and the first tooth edge have an angle of 25°-35°.

[0010] Furthermore, the upper ratchet also includes a third tooth edge, which connects the first tooth edge and the second tooth edge, and the shape of the third tooth edge includes arc, straight line and sharp angle.

[0011] Furthermore, the action plate also includes a limiting plate and a central plate. The lower plate is connected to the central plate, and the central plate is connected to the limiting plate. The limiting plate, the central plate, and the lower plate form a three-dimensional enclosed space, which has an outlet. The segment plate is inserted into or moved away from the three-dimensional enclosed space from the outlet.

[0012] Furthermore, the external tensioning structure includes a guide screw, a tension spring, and a limiting block. The tension spring is sleeved on the guide screw. At least one end of the sliding shaft is connected to a connecting block. At least one connecting hole is passed through one of the connecting blocks. The guide screw is inserted into one of the connecting holes. One end of the tension spring abuts against the surface of the limiting block or the surface of the actuating plate.

[0013] Furthermore, a first nut is threaded onto the guide screw, and the end of the tension spring away from the limiting block or the actuating plate abuts against the surface of the first nut.

[0014] Furthermore, a second nut is abutted against the side of the limiting block or the actuating plate away from the tension spring, and the second nut is threadedly connected to the guide screw.

[0015] Furthermore, a third nut is threaded onto the guide screw, the third nut abutting against one side of the connecting block, the guide screw has a nut, and the side of the connecting block away from the third nut abuts against the nut.

[0016] Furthermore, at least one side of the sprocket is provided with a base, and each base has at least one sliding groove through it, and the sliding shaft or the connecting block slides on the inner wall of the sliding groove in the direction of X1 or X2.

[0017] The beneficial effects of this utility model are as follows: By setting an external tensioning structure, pitch teeth, and upper ratchet, and other connecting and limiting components, this utility model makes the movement of the pitch teeth a unidirectional automated tensioning mechanism, reducing the skipping behavior of the chain and sprocket when suddenly starting or when the load suddenly increases, reducing abnormal noise during conveying and increasing the service life of efficient conveying. In addition, it also solves the problem of shaking and trembling during normal operation of the conveyor line, increasing the stability of conveying. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0020] Figure 3 This is a utility model Figure 2 A schematic diagram of the exploded structure;

[0021] Figure 4 This is a schematic diagram of the meshing structure of the phasing teeth and upper ratchet teeth of this utility model;

[0022] Figure 5 This is a structural schematic diagram of other cases of engagement between the phalangeal teeth and the upper ratchet teeth of this utility model.

[0023] Reference numerals in the attached diagram: 1. Sprocket; 2. Sliding shaft; 21. Connecting block; 22. Connecting hole; 3. Pitch plate; 31. Pitch tooth; 311. Tooth groove; 312. Tooth tip; 4. Action plate; 41. Lower plate; 42. Upper ratchet; 421. First tooth edge; 422. Second tooth edge; 423. Third tooth edge; 43. Limiting plate; 44. Central plate; 5. External tensioning structure; 51. Guide screw; 52. Tensioning spring; 53. Limiting block; 54. First nut; 55. Second nut; 56. Third nut; 57. Nut; 6. Base; 61. Sliding groove. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] An anti-rebound mechanism for a chain-type roller conveyor includes a sprocket 1, a chain meshing with the sprocket 1, a sliding shaft 2 inserted into the hollow part of the sprocket 1, the sliding shaft 2 driving the sprocket 1 to move in the X1 or X2 direction, a positioning plate 3 mounted on the sliding shaft 2, the positioning plate 3 being disposed on one side of the sprocket 1, the positioning plate 3 having positioning teeth 31 arranged in a linear array, the positioning teeth 31 including a plurality of tooth grooves 311 and a plurality of tooth tips 312; an action plate 4 and an outer tensioning structure 5, the outer tensioning structure 5 at least indirectly connecting the action plate 4 and the positioning plate 3, the outer tensioning structure 5 causing the relative positions of the action plate 4 and the positioning plate 3 to be far apart, the action plate 4 including a lower plate 41, the lower plate 41 having at least one upper ratchet 42 at least indirectly connected, the at least one upper ratchet 42 being inserted into one of the tooth grooves 311 to position the positioning plate 3 relative to the action plate 4.

[0029] It should be noted that the axial movement of the position plate 3 on the sliding shaft 2 is restricted by the snap ring. The position plate 3 and the sliding shaft 2 move in the X1 or X2 direction. The pitch of the position tooth 31 is equal to half the pitch of the conveyor chain. Specifically, when the pitch of the conveyor chain is 12.7 mm 1 / 2 inch, the pitch of the position tooth 31 is 6.3 ± 1 mm; when the pitch of the conveyor chain is 19.05 mm 3 / 4 inch, the pitch of the position tooth 31 is 9.5 ± 1 mm. The reason for this design is that the chain of the conveyor roller is circular. When the number of teeth of the driving wheel and the driven sprocket 1 of the conveyor roller is equal, for every increase or decrease in the total length of the conveyor chain by one link, the theoretical position of the driven sprocket 1 moves backward or forward by exactly half a pitch. At this time, the position tooth 31 and the upper ratchet 42 are completely meshed.

[0030] like Figure 5 As shown, at least one upper ratchet 42 is inserted into the tooth groove 311 to a depth of 1 / 2 to 2 / 3 of the height of the tooth tip 312.

[0031] like Figure 4 As shown, the upper ratchet 42 includes a first tooth edge 421 and a second tooth edge 422. The angle between the first tooth edge 421 and the line connecting X1 to X2 in the direction close to X1 is 90°-110°, and the angle between the second tooth edge 422 and the first tooth edge 421 is 25°-35°.

[0032] like Figure 4 As shown, the upper ratchet 42 also includes a third tooth edge 423, which connects the first tooth edge 421 and the second tooth edge 422. The shape of the third tooth edge 423 includes arc, straight line and sharp corner.

[0033] like Figure 3 As shown, the action plate 4 also includes a limiting plate 43 and a middle plate 44. The lower plate 41 is connected to the middle plate 44, and the middle plate 44 is connected to the limiting plate 43. The limiting plate 43, the middle plate 44 and the lower plate 41 form a three-dimensional enclosed space, which has an outlet. The segment plate 3 is inserted into or moved away from the three-dimensional enclosed space from the outlet.

[0034] like Figure 1 As shown, the external tension structure 5 includes a guide screw 51, a tension spring 52, and a limiting block 53. The tension spring 52 is sleeved on the guide screw 51. At least one end of the sliding shaft 2 is connected to a connecting block 21. At least one connecting hole 22 is passed through one of the connecting blocks 21. The guide screw 51 is inserted into one of the connecting holes 22. One end of the tension spring 52 abuts against the surface of the limiting block 53 or the surface of the action plate 4.

[0035] like Figure 2As shown, a first nut 54 is threaded onto the guide screw 51. The end of the tension spring 52 away from the limit block 53 or the action plate 4 abuts against the surface of the first nut 54. The function of the first nut 54 is to adjust the initial compression and position of the tension spring 52.

[0036] like Figure 1 As shown, the limiting block 53 or the action plate 4 is abutted against the side away from the tension spring 52 by a second nut 55, and the second nut 55 is threadedly connected to the guide screw 51.

[0037] It should be noted that the tension spring 52 is fitted onto the guide screw 51. One end of the tension spring 52 abuts against the first nut 54, and the other end abuts against one side of the limiting block 53. The guide screw 51 is inserted into the through hole of the limiting block 53. On the guide screw 51, on the other side of the limiting block 53, a second nut 55 is installed. The function of the second nut 55 is: 1. to adjust and control the minimum compression of the tension spring 52, which determines the minimum tension force provided to the chain; 2. to limit the farthest tension position of the driven sprocket 1 in the X1 direction. The purpose of this limitation is to prevent the position of the sliding shaft 2 from reaching the limit position of the sliding groove 61, thereby losing the function of automatic tension adjustment.

[0038] like Figure 2 As shown, a third nut 56 is threaded onto the guide screw 51. The third nut 56 abuts against one side of the connecting block 21. The guide screw 51 has a nut 57. The side of the connecting block 21 away from the third nut 56 abuts against the nut 57. The other side of the sliding shaft locks the third nut 56, thus fixing the guide screw 51 and the sliding shaft 2 into a whole.

[0039] like Figure 1 As shown, at least one side of the sprocket 1 is provided with a base 6, and each base 6 has at least one sliding groove 61 extending through it. The sliding shaft 2 or the connecting block 21 slides along the X1 or X2 direction on the inner wall of the sliding groove 61.

[0040] Example 1: During use, the chain may be too long to fully and accurately engage with sprocket 1. In this case, the external tensioning structure 5 is needed to drive the driven sprocket 1 to move away from the driving sprocket 1. This example is... Figure 1In the X1 direction, the tension spring 52 is fitted onto the guide screw 51, which passes through the limiting block 53. The guide screw 51 locks one end of the tension spring 52 onto the thread of the first nut 54, and the guide screw 51 locks one side of the limiting block 53 onto the thread of the second nut 55. This adjusts and controls the minimum compression of the tension spring 52, determining the minimum tension force provided to the chain, and limiting the furthest tension position of the driven sprocket 1 in the X1 direction. The nut 57 and the third nut 56 connect and fix the guide screw 51 and the connecting block 21 together. The limiting block 53 connects to the action plate 4, which is connected and fixed to the base 6, ensuring that the tension spring 52 ultimately provides the chain with the minimum tension force. The displacement of the connecting block 21, sliding shaft 2, and sprocket 1 in the X1 direction causes the pitch plate 3 and pitch tooth 31 to move. The original N position of the pitch tooth 31 is inserted by the upper ratchet 42, and the N+ right position of the pitch tooth 311 is inserted by the upper ratchet 42, which causes the sliding shaft 2 to slide in the sliding groove 61, so that the sprocket 1 tensions the chain. The angle between the first tooth edge 421 of the upper ratchet 42 and the line connecting X1 to X2 in the direction close to X1 is 90°-110°, and the angle between the second tooth edge 422 and the first tooth edge 421 is 25°-35°, so that the pitch tooth 31 can only be moved in the X1 direction by the tension of the tension spring 52.

[0041] Example 2: As Figure 5 As shown, the shapes of the upper ratchet 42 and the tooth groove 311, as well as the space in which the upper ratchet 42 inserts into the tooth groove 311, are subject to certain restrictions. For example, the shape of the third tooth edge 423 includes arc, straight line and sharp corner. The depth of the upper ratchet 42 inserted into the tooth groove 311 is 1 / 2 to 2 / 3 of the height of the tooth tip 312. Furthermore, the first tooth edge 421, the second tooth edge 422 and the third tooth edge 423 are generally curved or straight, but the middle section or details can be modified. These will not affect the anti-rebound effect.

[0042] 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, and various changes and modifications can be made without departing from the spirit and scope of this utility model. 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. An anti-rebound mechanism for a chain-type roller conveyor, characterized in that, include A sprocket (1) is connected to a chain. A sliding shaft (2) is inserted into the hollow part of the sprocket (1). The sliding shaft (2) drives the sprocket (1) to move in the X1 or X2 direction. A pitch plate (3) is installed on the sliding shaft (2). The pitch plate (3) is located on one side of the sprocket (1). The pitch plate (3) has pitch teeth (31) arranged in a linear array. The pitch teeth (31) include a number of tooth grooves (311) and a number of tooth tips (312). The action plate (4) and the extension structure (5) are provided. The extension structure (5) connects the action plate (4) and the segment plate (3) at least indirectly. The extension structure (5) moves the relative positions of the action plate (4) and the segment plate (3) away. The action plate (4) includes a lower plate (41). At least one upper ratchet (42) is connected to the lower plate (41) at least indirectly. The at least one upper ratchet (42) is inserted into one of the tooth grooves (311) to position the segment plate (3) relative to the action plate (4).

2. The anti-rebound mechanism on the chain-type roller conveyor according to claim 1, characterized in that, At least one upper ratchet (42) is inserted into the tooth groove (311) to a depth of 1 / 2 to 2 / 3 of the height of the tooth tip (312).

3. The anti-rebound mechanism on the chain-type roller conveyor according to claim 1, characterized in that, The upper ratchet (42) includes a first tooth edge (421) and a second tooth edge (422). The angle between the first tooth edge (421) and the line connecting X1 to X2 in the direction close to X1 is 90°-110°, and the angle between the second tooth edge (422) and the first tooth edge (421) is 25°-35°.

4. The anti-rebound mechanism on the chain-type roller conveyor according to claim 3, characterized in that, The upper ratchet (42) also includes a third tooth edge (423), which connects the first tooth edge (421) and the second tooth edge (422). The shape of the third tooth edge (423) includes arc, straight line and sharp corner.

5. The anti-rebound mechanism on the chain-type roller conveyor according to claim 1, characterized in that: The action plate (4) also includes a limiting plate (43) and a central plate (44). The lower plate (41) is connected to the central plate (44), and the central plate (44) is connected to the limiting plate (43). The limiting plate (43), the central plate (44), and the lower plate (41) form a three-dimensional enclosed space with an outlet. The segment plate (3) is inserted into or moved away from the three-dimensional enclosed space from the outlet.

6. The anti-rebound mechanism on the chain-type roller conveyor according to claim 1, characterized in that, The external tension structure (5) includes a guide screw (51), a tension spring (52), and a limiting block (53). The tension spring (52) is sleeved on the guide screw (51). At least one end of the sliding shaft (2) is connected to a connecting block (21). At least one connecting hole (22) is passed through one of the connecting blocks (21). The guide screw (51) is inserted into one of the connecting holes (22). One end of the tension spring (52) abuts against the surface of the limiting block (53) or the surface of the actuating plate (4).

7. The anti-rebound mechanism on the chain-type roller conveyor according to claim 6, characterized in that, The guide screw (51) is threaded with a first nut (54), and the end of the tension spring (52) away from the limiting block (53) or the action plate (4) abuts against the surface of the first nut (54).

8. The anti-rebound mechanism on the chain-type roller conveyor according to claim 6, characterized in that, The limiting block (53) or the action plate (4) is abutted against the side away from the tension spring (52) by a second nut (55), and the second nut (55) is threadedly connected to the guide screw (51).

9. The anti-rebound mechanism on the chain-type roller conveyor according to claim 6, characterized in that, The guide screw (51) is threaded with a third nut (56), which abuts against one side of the connecting block (21). The guide screw (51) has a nut (57), and the side of the connecting block (21) away from the third nut (56) abuts against the nut (57).

10. The anti-rebound mechanism on the chain-type roller conveyor according to claim 6, characterized in that, At least one side of the sprocket (1) is provided with a base (6), and each base (6) has at least one sliding groove (61) through it. The sliding shaft (2) or the connecting block (21) slides along the X1 or X2 direction on the inner wall of the sliding groove (61).

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