Chain tensioning mechanism and tensioning method

Abstract

The invention belongs to the technical field of chain tensioning equipment, and discloses a chain tensioning mechanism and a tensioning method. The mechanism is provided with a fixing frame; the fixing frame is located on the outer side of the whole tensioning mechanism and used for fixing the whole tensioning mechanism to the conveying system. The floating frame is located on the inner side of the fixing frame and can move front and back. The rotating wheel is mounted in the floating frame, so that the power and free chain steers along the rotating wheel; the cylinder is positioned on one side of the fixed frame; a cylinder piston rod on the cylinder is connected with the floating frame; the telescopic rails are located on two sides of the floating frame. When the power and free chain deforms and is lengthened, the floating frame continues to move forwards through pulling force provided by the air cylinder, the telescopic rails on the two sides are driven to synchronously stretch, the walking distance of the power and free chain is increased, and the continuous tensioning effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of chain tensioning equipment, and in particular relates to a chain tensioning mechanism and a tensioning method. Background Art

[0002] When the chain of the conveyor line is running, it will be deformed, stretched and piled up, and a device is needed to keep the chain in a tensioned state at all times. In the existing conveyor line equipment, the chain runs in a closed loop, and the running path and length are fixed. When the chain increases in length due to deformation, it will pile up and cannot maintain a tensioned state.

[0003] Through the above analysis, the problems and defects of the prior art are as follows: in the prior art, the chain cannot maintain a tensioned state after being stretched, which affects the normal operation of the equipment. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the disclosed embodiment of the present invention provides a chain tensioning mechanism, which is mainly used in a power-and-release conveyor line.

[0005] The technical solution is as follows: A chain tensioning mechanism is provided with:

[0006] A fixing frame, located outside the entire tensioning mechanism, is used to fix the entire tensioning mechanism on the conveying system;

[0007] The floating frame is located inside the fixed frame and is used for forward and backward movement;

[0008] The slewing wheel is installed inside the floating frame, so that the accumulation chain turns along the slewing wheel;

[0009] The cylinder is located on one side of the fixed frame, and the cylinder piston rod on the cylinder is connected to the floating frame;

[0010] Telescopic rails are located on both sides of the floating frame.

[0011] Furthermore, guide wheels are installed on both sides of the floating frame, and the guide wheels are located on the fixed frame, so that the floating frame can move forward and backward in the fixed frame.

[0012] Furthermore, the telescopic track is composed of two opposite single-sided tracks, one of which is connected to the floating frame and the other is connected to the fixed frame, and is extended or shortened with the movement of the floating frame.

[0013] Another object of the present invention is to provide a tensioning method for a chain tensioning mechanism, the method being applied to the chain tensioning mechanism, the method comprising:

[0014] When the accumulation chain does not deform and stretch, a pulling force is provided to the floating frame through the cylinder, so that the floating frame moves forward, driving the rotary wheel fixed on the floating frame to move, so that the accumulation chain bypassing the rotary wheel is tightened;

[0015] When the accumulation chain is deformed and elongated, the tension provided by the cylinder causes the floating frame to continue to move forward, driving the telescopic rails on both sides to extend synchronously, increasing the travel distance of the accumulation chain and achieving continuous tension.

[0016] Furthermore, when the accumulation chain does not deform and stretch, the accumulation chain enters the tensioning mechanism through the telescopic track on one side, turns along the rotary wheel, and exits the tensioning mechanism through the telescopic track on the other side.

[0017] Furthermore, a tension sensor is installed on the floating frame for detecting the current tension reaction force of the accumulation chain bypassing the rotary wheel, and the current tension reaction force is fed back to the control end mounted on the equipment of the external conveyor line. The control end compares the tension of the built-in cylinder with the current tension reaction force. When the current tension reaction force is less than the tension of the cylinder, the control end continues to regulate the floating frame to continue to move forward, driving the telescopic rails on both sides to extend synchronously.

[0018] When the control end compares and finds that the current tension reaction force is equal to the tension of the cylinder, the instruction for the floating frame to continue moving forward stops;

[0019] When the floating frame's travel limit distance is detected by the electrical switches set at the front and rear ends of the floating frame's moving direction, the control end receives this signal, issues an alarm prompt for the floating frame's travel limit distance, and notifies the operator to perform timely maintenance.

[0020] Furthermore, the control end compares the tension of the built-in cylinder with the current tension reaction force, including:

[0021] Step 1: Given a set of irregularly distributed points (a, b, c) on the tension plane of the cylinder, number them in the reading order [1, 2…k], and determine the maximum rectangular area [A mi n,A max ]; The irregularly distributed point set of the tension plane of the cylinder is converted into an unstructured rectangular network by using the divide-and-conquer method;

[0022] Step 2: number all rectangles in order as [1, 2…k], record the numbers of the four vertices corresponding to each rectangle and the numbers of the rectangles adjacent to the four sides; calculate and save the nonlinear interpolation weight coefficients of all rectangles at one time; set the grid spacing in the a and b directions to obtain the gridded current tension reaction force nodes to be interpolated;

[0023] Step 3, select a current tension reaction force grid node to be inserted, and use a rectangle in the rectangular network as the main judgment rectangle, and use the vector product of the current tension reaction force grid node to be inserted and the two vertices of the main judgment rectangle to determine the relative position relationship between the current tension reaction force grid node to be inserted and the rectangular edge; if the current tension reaction force grid node to be inserted is on the left side of the rectangular edge, the two vertices of the rectangle are replaced in counterclockwise order; if the current tension reaction force grid node to be inserted is on the right side of the rectangular edge, the rectangle adjacent to the right side of the rectangle is selected as the new main judgment rectangle; when interpolating for the first time, select the rectangle numbered 1 as the initial main judgment rectangle; if the rectangle where the current interpolation node is located is inside the rectangular network, the rectangle is used as the main judgment rectangle for the next current tension reaction force node to be inserted; when searching to the boundary of the rectangular network and finding that the current tension reaction force node to be inserted is outside the rectangular network, the boundary rectangle is used as the main judgment rectangle for the next current tension reaction force node to be inserted;

[0024] Step 4, repeatedly judging the relationship between the current tension reaction force grid node to be inserted and the rectangular edge, quickly approaching and locating the rectangle where the current tension reaction force node to be inserted is located; if the rectangle where the current tension reaction force node to be inserted is located can be found in the rectangular network, the current tension reaction force grid node is interpolated using the nonlinear interpolation weight coefficient of the rectangle; if it is not found, it means that the current tension reaction force grid node to be inserted is not inside the rectangular network, and no interpolation is performed;

[0025] Step 5: until the interpolation of all current tensioning reaction force grid nodes is completed, and the interpolation of the current tensioning reaction force grid nodes is equal to the tension of the cylinder, the interpolation ends; if the interpolation of the current tensioning reaction force grid nodes is less than the tension of the cylinder, repeat steps 3 to 5 until the interpolation of the current tensioning reaction force grid nodes is equal to the tension of the cylinder, and the control end stops the instruction to control the floating frame to continue to move forward; and output the gridding result to a file in *.grd format.

[0026] In step 2, all rectangles are numbered in sequence as [1,2…k], including:

[0027] The coordinate numbers of the irregularly distributed point set of the tension plane of the cylinder are used as the vertex numbers of the rectangles in the rectangular net. For the numbers of the rectangles adjacent to the four sides of any rectangle, the sequence numbers of the rectangles in the rectangular net are used as the numbers. If the rectangle is located at the edge of the rectangular net and there are no adjacent rectangles on some sides, the number is set to -1. The positive and negative signs of the number indicate whether the current tension reaction force grid node to be inserted is located inside or outside the rectangular net.

[0028] The recording of the four vertex numbers corresponding to each rectangle and the numbers of the four adjacent rectangles includes: if the rectangle is located inside the rectangular net, there are four adjacent rectangles; if the rectangle is located at the edge of the rectangular net, there are 1 or 2 adjacent rectangles.

[0029] Furthermore, the nonlinear interpolation weight coefficients of all rectangles are calculated and saved at one time, including:

[0030] Calculate and save the interpolation weight coefficients α, β, δ of all rectangles at once;

[0031] If b1≠b4, then:

[0032]

[0033] If b1≠b4, then:

[0034]

[0035] In the formula, A(a1,b1,c1), B(a2,b2,c2), C(a3,b3,c3), and D(a4,b4,c4) represent the coordinates of the four vertices of the rectangle.

[0036] Furthermore, the rectangle where the current tension reaction force node is to be inserted is quickly approached and located, including:

[0037] (1) Given the current tension reaction force node P to be inserted and the main judgment rectangle, the four vertices of which are recorded as: P1, P2, P3, P4;

[0038] (2) Take vertices P1, P2 and the current tension reaction force node P to be inserted to form a vector and When the vector product , determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1). If not, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2). If the vector product is If not, execute step (3);

[0039] (3) When the vector product When the vertices P2 and P3 are taken together with the current tension reaction force node P to be inserted, a vector is formed. and When the vector product , determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1); if it is not -1, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (4);

[0040] (4) When the vector product When , the vertices P3 and P1 are taken to form a vector with the current tension reaction force node P to be inserted and When the vector product Determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1). If it is not -1, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (5);

[0041] When the vector product When , the vertices P4 and P1 are taken to form a vector with the current tension reaction force node P to be inserted and When the vector product Determine whether the number of the rectangle adjacent to the P4P1 side is -1. If it is -1, return to step (1). If it is not -1, take the rectangle adjacent to the P4P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (5);

[0042] (5) When the vector product When the main judgment rectangle and the vector determined by the current tension reaction force node P to be inserted Cross product condition The conditions are met at the same time. At this time, point P is located inside or on one of the four sides of the main judgment rectangle. The main judgment rectangle is the rectangle where point P is located.

[0043] When the vector product When the main judgment rectangle and the vector determined by the current tension reaction force node P to be inserted Cross product condition The conditions are satisfied at the same time. At this time, point P is located inside or on one of the four sides of the main judgment rectangle. The main judgment rectangle is the rectangle where point P is located.

[0044] In combination with all the above-mentioned technical solutions, the beneficial effects of the present invention are as follows: the present invention allows the accumulation chain to enter the tensioning mechanism through the telescopic track on one side, turn along the slewing wheel, and then exit the tensioning mechanism through the telescopic track on the other side. At this time, the cylinder provides a pulling force to the floating frame, so that the floating frame moves forward, driving the slewing wheel fixed on the floating frame to move, so that the accumulation chain bypassing the slewing wheel is tightened, thereby achieving the tensioning effect.

[0045] When the accumulation chain is deformed and elongated, the tension provided by the cylinder causes the floating frame to continue to move forward, driving the telescopic rails on both sides to extend synchronously, increasing the travel distance of the accumulation chain and achieving a continuous tensioning effect.

[0046] The invention solves the problem of chain deformation within a certain length range and reduces the frequency of inspection and maintenance of the conveyor line chain.

[0047] The invention can be applied to the fields of accumulation and release conveyor lines, rotating parts of motor vehicles, and lifting parts of stereo garages. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, serve to explain the principles of the present disclosure;

[0049] Figure 1 is a schematic diagram of a chain tensioning mechanism provided by an embodiment of the present invention;

[0050] Figure 2 is a schematic diagram of the connection of the telescopic track provided by an embodiment of the present invention;

[0051] Figure 3 is a schematic diagram of guide wheel connection provided by an embodiment of the present invention;

[0052] Figure 4 is a schematic diagram of control terminal signal connection provided by an embodiment of the present invention;

[0053] In the figure: 1. fixed frame; 2. floating frame; 3. rotating wheel; 4. cylinder; 5. telescopic track; 6. guide wheel; 7. tension sensor; 8. control end; 9. electrical switch. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0055] The innovative point of the chain tensioning mechanism provided by the embodiment of the present invention is that the chain tensioning mechanism is powered by a cylinder, which effectively addresses the problem of chain deformation and elongation, keeps the chain in a tensioned state at all times, and reduces the frequency of inspection and maintenance at the production site.

[0056] Embodiment 1, as Figure 1-Figure 3 As shown, the chain tensioning mechanism provided by the embodiment of the present invention includes: a fixed frame 1, a floating frame 2, a rotary wheel 3, a cylinder 4, a telescopic rail 5, and a guide wheel 6;

[0057] The fixed frame 1 is located on the outside of the entire tensioning mechanism and is responsible for fixing the entire tensioning mechanism at a suitable position in the conveying system; the floating frame 2 is located on the inside of the fixed frame 1 and can move forward and backward; the slewing wheel 3 is installed inside the floating frame 2 to make the accumulation chain turn along the slewing wheel 3; the cylinder 4 is located on one side of the fixed frame 1, and the cylinder piston rod on the cylinder 4 is connected to the floating frame 2; the telescopic rail 5 is located on both sides of the floating frame 2.

[0058] Guide wheels 6 are installed on both sides of the floating frame 2, and the guide wheels 6 are located on the fixed frame 1, so that the floating frame 2 can move forward and backward in the fixed frame 1; the telescopic track 5 is composed of two opposite single-sided tracks, one connected to the floating frame 2 and the other connected to the fixed frame 1, and can be extended or shortened with the movement of the floating frame 2.

[0059] It can be seen from the above embodiments that the tension provided by the cylinder to the floating frame is constant, the same in magnitude as the tension of the chain itself, and in the opposite direction. When the deformation length of the chain increases, the floating frame moves in the opposite direction of the chain under the tension of the cylinder, driving the telescopic rails on both sides to extend, thereby increasing the total length of the closed loop where the chain is located, and tensioning the chain. At the same time, electrical switches can be set at the front and rear ends of the floating frame in the moving direction. When the floating frame is about to reach the travel limit, an electrical signal is provided to the monitoring system to notify the operator to perform timely maintenance.

[0060] Embodiment 2, the present invention provides a tensioning method of a chain tensioning mechanism, comprising:

[0061] The accumulation chain enters the tensioning mechanism through the telescopic track 5 on one side, turns along the slewing wheel 3, and then exits the tensioning mechanism through the telescopic track 5 on the other side. At this time, the cylinder 4 provides a pulling force to the floating frame 2, so that the floating frame 2 moves forward, driving the slewing wheel 3 fixed on the floating frame 2 to move, so that the accumulation chain bypassing the slewing wheel 3 is tightened to achieve the tensioning effect.

[0062] When the accumulation chain is deformed and elongated, the tension provided by the cylinder 4 causes the floating frame 2 to continue to move forward, driving the telescopic rails 5 on both sides to extend synchronously, thereby increasing the travel distance of the accumulation chain and achieving a continuous tensioning effect.

[0063] In an exemplary embodiment, the tension provided by the cylinder may be preset, constant, opposite in direction to the tensioning force of the chain itself, and of the same magnitude.

[0064] Embodiment 3, as a preferred embodiment of the present invention, Figure 4As shown, the floating frame 2 is equipped with a tension sensor 7 for detecting the current tension reaction force of the accumulation chain bypassing the rotary wheel 3, and the current tension reaction force is fed back to the control end 8 mounted on the equipment of the external conveyor line. The control end 8 compares the tension of the built-in cylinder 4 with the current tension reaction force. When the current tension reaction force is less than the tension of the cylinder 4, the control end 8 continues to regulate the floating frame 2 to continue to move forward, driving the telescopic rails 5 on both sides to extend synchronously.

[0065] When the control end 8 compares and finds that the current tension reaction force is equal to the tension of the cylinder 4, the instruction for the floating frame 2 to continue moving forward stops;

[0066] When the limit travel distance of the floating frame 2 is detected by the electrical switches 9 arranged at the front and rear ends of the floating frame 2 in the moving direction, the control end 8 receives the signal, issues an alarm prompt for the limit travel distance of the floating frame 2, and notifies the operator to perform maintenance in time.

[0067] Preferably, the method of comparing the tension of the built-in cylinder 4 of the control end 8 with the current tension reaction force includes:

[0068] Step 1: Given a set of irregularly distributed points (a, b, c) on the tension plane of the cylinder, number them in the order of reading [1, 2…k], and determine the maximum rectangular area of ​​the irregularly distributed point set: [A min ,A max ]; The irregularly distributed point set of the tension plane of the cylinder is converted into an unstructured rectangular network by using the divide-and-conquer method;

[0069] Step 2: number all rectangles in order [1, 2…k], and record the 4 vertex numbers corresponding to each rectangle and the numbers of the rectangles adjacent to its four sides; calculate and save the nonlinear interpolation weight coefficients of all rectangles at one time; set the grid spacing in the a and b directions to obtain the gridded current tension reaction force nodes to be interpolated;

[0070] Step 3, selecting a current tension reaction force grid node to be inserted, and taking a certain rectangle in the rectangular network as a main judgment rectangle, and using the vector product of the current tension reaction force grid node to be inserted and two vertices of the main judgment rectangle to determine the relative position relationship between the current tension reaction force grid node to be inserted and the rectangular edge;

[0071] Step 4, repeatedly judging the relationship between the current tension reaction force grid node to be inserted and the rectangular edge, quickly approaching and locating the rectangle where the current tension reaction force node to be inserted is located; if the rectangle where the current tension reaction force node to be inserted is located can be found in the rectangular network, the current tension reaction force grid node is interpolated using the nonlinear interpolation weight coefficient of the rectangle; if it is not found, it means that the current tension reaction force grid node to be inserted is not inside the rectangular network, and no interpolation is performed;

[0072] Step 5, repeat step 4 until the interpolation of all current tensioning reaction force grid nodes is completed. If the interpolation of the current tensioning reaction force grid nodes is equal to the tension of the cylinder 4, the interpolation ends. If the interpolation of the current tensioning reaction force grid nodes is less than the tension of the cylinder 4, repeat steps 3 to 5 until the interpolation of the current tensioning reaction force grid nodes is equal to the tension of the cylinder 4, indicating that the command of the control terminal 8 to control the floating frame 2 to continue to move forward stops; and output the gridding result to the file in *.grd format.

[0073] In step 2, all rectangles are numbered in sequence [1, 2…k], and the numbers of the four vertices corresponding to each rectangle and the numbers of the rectangles adjacent to its four sides are recorded, including:

[0074] The coordinate numbers of the irregularly distributed point set of the tension plane of the cylinder are used as the vertex numbers of the rectangles in the rectangular net. For the numbers of the rectangles adjacent to the four sides of any rectangle, the sequence numbers of the rectangles in the rectangular net are used as the numbers. If the rectangle is located at the edge of the rectangular net and there are no adjacent rectangles on some sides, the number is set to -1. The positive and negative signs of the number indicate whether the current tension reaction force grid node to be inserted is located inside or outside the rectangular net.

[0075] In step 2, the recording of the four vertex numbers corresponding to each rectangle and the numbers of the rectangles adjacent to its four sides includes:

[0076] If the rectangle is located inside the rectangular net, there are 4 adjacent rectangles; if the rectangle is located at the edge of the rectangular net, there are 1 or 2 adjacent rectangles.

[0077] In step 2, the calculation and one-time saving of nonlinear interpolation weight coefficients of all rectangles includes:

[0078] Calculate and save the interpolation weight coefficients α, β, δ of all rectangles at once;

[0079] If b1≠b4, then:

[0080]

[0081] If b1≠b4, then:

[0082]

[0083] In the formula, A(a1,b1,c1), B(a2,b2,c2), C(a3,b3,c3), and D(a4,b4,c4) represent the coordinates of the four vertices of the rectangle.

[0084] The method of taking a certain rectangle in the rectangular network as the main judgment rectangle comprises:

[0085] When interpolating for the first time, select the rectangle numbered 1 as the initial main judgment rectangle;

[0086] If the rectangle where the current interpolation node is located is inside the rectangular network, the rectangle is used as the main judgment rectangle for the next current tension reaction force node to be interpolated;

[0087] When searching to the rectangular network boundary and finding that the current tension reaction force node to be inserted is located outside the rectangular network, the boundary rectangle is used as the main judgment rectangle for the next current tension reaction force node to be inserted.

[0088] In step 3, the step of using the vector product of the current tension reaction force grid node to be inserted and two vertices of the main judgment rectangle to determine the relative position relationship between the current tension reaction force grid node to be inserted and the edge of the rectangle includes:

[0089] If the current tension reaction force grid node to be inserted is on the left side of the rectangular edge, the two vertices of the rectangle are replaced in counterclockwise order; if the current tension reaction force grid node to be inserted is on the right side of the rectangular edge, the rectangle adjacent to the right side of the rectangle is selected as the new main judgment rectangle;

[0090] In step 4, the process of quickly approaching and locating the rectangle where the current tension reaction force node to be inserted is located includes:

[0091] (1) Given the current tension reaction force node P to be inserted and the main judgment rectangle, the four vertices of which are recorded as: P1, P2, P3, P4;

[0092] (2) Take vertices P1, P2 and the current tension reaction force node P to be inserted to form a vector and When the vector product , determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1). If not, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2). If the vector product is If not, execute step (3);

[0093] (3) When the vector product When the vertices P2 and P3 are taken together with the current tension reaction force node P to be inserted, a vector is formed. and When the vector product , determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1); if it is not -1, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (4);

[0094] (4) When the vector product When , the vertices P3 and P1 are taken to form a vector with the current tension reaction force node P to be inserted and When the vector product Determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1). If it is not -1, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (5);

[0095] When the vector product When , the vertices P4 and P1 are taken to form a vector with the current tension reaction force node P to be inserted and When the vector product Determine whether the number of the rectangle adjacent to the P4P1 side is -1. If it is -1, return to step (1). If it is not -1, take the rectangle adjacent to the P4P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (5);

[0096] (5) When the vector product When the main judgment rectangle and the vector determined by the current tension reaction force node P to be inserted Cross product condition The conditions are met at the same time. At this time, point P is located inside or on one of the four sides of the main judgment rectangle. The main judgment rectangle is the rectangle where point P is located.

[0097] When the vector product When the main judgment rectangle and the vector determined by the current tension reaction force node P to be inserted Cross product condition The conditions are satisfied at the same time. At this time, point P is located inside or on one of the four sides of the main judgment rectangle. The main judgment rectangle is the rectangle where point P is located.

[0098] The above embodiments show that the control end 8 of the present invention compares the tension of the built-in cylinder 4 with the current tension reaction force. When the current tension reaction force is less than the tension of the cylinder 4, the control end 8 continues to regulate the floating frame 2 to continue to move forward, driving the telescopic rails 5 on both sides to extend synchronously; when the control end 8 compares and finds that the current tension reaction force is equal to the tension of the cylinder 4, the instruction for the floating frame 2 to continue to move forward stops; when the electrical switch 9 set at the front and rear ends of the floating frame 2 in the moving direction detects the limit distance of the floating frame 2, the control end 8 receives this signal, issues an alarm prompt for the limit distance of the floating frame 2, and notifies the operator to perform timely maintenance. The intelligent regulation of the chain can be realized, labor costs are saved, and production efficiency is improved.

[0099] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered within the protection scope of the present invention.

Claims

1. A chain tensioning mechanism, characterized in that: The organization has: A fixing frame (1), located outside the entire tensioning mechanism, and used to fix the entire tensioning mechanism on the conveying system; A floating frame (2), located inside the fixed frame (1), for moving forward and backward; A rotary wheel (3) is installed inside the floating frame (2) to make the accumulation chain turn along the rotary wheel (3); The cylinder (4) is located on one side of the fixed frame (1), and the cylinder piston rod on the cylinder (4) is connected to the floating frame (2); The telescopic rails (5) are located on both sides of the floating frame (2).

2. The chain tensioning mechanism according to claim 1, characterized in that: Guide wheels (6) are installed on both sides of the floating frame (2), and the guide wheels (6) are located on the fixed frame (1), so that the floating frame (2) can move forward and backward in the fixed frame (1).

3. The chain tensioning mechanism according to claim 1, characterized in that: The telescopic track (5) is composed of two opposite single-sided tracks, one of which is connected to the floating frame (2) and the other is connected to the fixed frame (1), and is extended or shortened as the floating frame (2) moves.

4. A tensioning method for a chain tensioning mechanism, characterized in that: The method is applied to the chain tensioning mechanism according to any one of claims 1 to 3, and the method comprises: When the accumulation chain does not deform and stretch, a pulling force is provided to the floating frame (2) through the cylinder (4), so that the floating frame (2) moves forward, driving the rotating wheel (3) fixed on the floating frame (2) to move, so that the accumulation chain passing around the rotating wheel (3) is tightened; When the accumulation chain is deformed and stretched, the tension provided by the cylinder (4) causes the floating frame (2) to continue to move forward, driving the telescopic rails (5) on both sides to extend synchronously, thereby increasing the travel distance of the accumulation chain and achieving continuous tension.

5. The tensioning method of the chain tensioning mechanism according to claim 4, characterized in that: When the accumulation chain does not deform and stretch, the accumulation chain enters the tensioning mechanism through the telescopic track (5) on one side, turns along the rotary wheel (3), and exits the tensioning mechanism through the telescopic track (5) on the other side.

6. The tensioning method of the chain tensioning mechanism according to claim 4, characterized in that: The floating frame (2) is provided with a tension sensor (7) for detecting the current tension reaction force of the accumulation chain bypassing the rotary wheel (3), and the current tension reaction force is fed back to the control end (8) mounted on the equipment of the external conveyor line. The control end (8) compares the tension of the built-in cylinder (4) with the current tension reaction force. When the current tension reaction force is less than the tension of the cylinder (4), the control end (8) continues to regulate the floating frame (2) to continue to move forward, thereby driving the telescopic rails (5) on both sides to extend synchronously. When the control end (8) compares the current tension reaction force to the tension force of the cylinder (4), the instruction for the floating frame (2) to continue to move forward stops; When the limit travel distance of the floating frame (2) is detected by the electrical switches (9) arranged at the front and rear ends of the floating frame (2) in the moving direction, the control end (8) receives the signal and issues an alarm prompt for the limit travel distance of the floating frame (2), notifying the operator to perform maintenance in time.

7. The tensioning method of the chain tensioning mechanism according to claim 6, characterized in that: The control end (8) compares the tension of the built-in cylinder (4) with the current tension reaction force, including: Step 1: Given a set of irregularly distributed points (a, b, c) on the tension plane of the cylinder, number them in the reading order [1, 2…k], and determine the maximum rectangular area [A min ,A max ]; The irregularly distributed point set of the tension plane of the cylinder is converted into an unstructured rectangular network by using the divide-and-conquer method; Step 2: number all rectangles in order as [1, 2…k], record the numbers of the four vertices corresponding to each rectangle and the numbers of the rectangles adjacent to the four sides; calculate and save the nonlinear interpolation weight coefficients of all rectangles at one time; set the grid spacing in the a and b directions to obtain the gridded current tension reaction force nodes to be interpolated; Step 3, select a current tension reaction force grid node to be inserted, and use a rectangle in the rectangular network as the main judgment rectangle, and use the vector product of the current tension reaction force grid node to be inserted and the two vertices of the main judgment rectangle to determine the relative position relationship between the current tension reaction force grid node to be inserted and the rectangular edge; if the current tension reaction force grid node to be inserted is on the left side of the rectangular edge, the two vertices of the rectangle are replaced in counterclockwise order; if the current tension reaction force grid node to be inserted is on the right side of the rectangular edge, the rectangle adjacent to the right side of the rectangle is selected as the new main judgment rectangle; when interpolating for the first time, select the rectangle numbered 1 as the initial main judgment rectangle; if the rectangle where the current interpolation node is located is inside the rectangular network, the rectangle is used as the main judgment rectangle for the next current tension reaction force node to be inserted; when searching to the boundary of the rectangular network and finding that the current tension reaction force node to be inserted is outside the rectangular network, the boundary rectangle is used as the main judgment rectangle for the next current tension reaction force node to be inserted; Step 4, repeatedly judging the relationship between the current tension reaction force grid node to be inserted and the rectangular edge, quickly approaching and locating the rectangle where the current tension reaction force node to be inserted is located; if the rectangle where the current tension reaction force node to be inserted is located can be found in the rectangular network, the current tension reaction force grid node is interpolated using the nonlinear interpolation weight coefficient of the rectangle; if it is not found, it means that the current tension reaction force grid node to be inserted is not inside the rectangular network, and no interpolation is performed; Step 5: until the interpolation of all current tensioning reaction force grid nodes is completed and the interpolation of the current tensioning reaction force grid nodes is equal to the tension of the cylinder (4), the interpolation ends; if the interpolation of the current tensioning reaction force grid nodes is less than the tension of the cylinder (4), steps 3 to 5 are repeated until the interpolation of the current tensioning reaction force grid nodes is equal to the tension of the cylinder (4), and the control end (8) stops the instruction to control the floating frame (2) to continue to move forward; and the gridding result is output to a file in *.grd format.

8. The tensioning method of the chain tensioning mechanism according to claim 7, characterized in that: In step 2, all rectangles are numbered in sequence as [1,2…k], including: The coordinate numbers of the irregularly distributed point set of the tension plane of the cylinder are used as the vertex numbers of the rectangles in the rectangular net. For the numbers of the rectangles adjacent to the four sides of any rectangle, the sequence numbers of the rectangles in the rectangular net are used as the numbers. If the rectangle is located at the edge of the rectangular net and there are no adjacent rectangles on some sides, the number is set to -1. The positive and negative signs of the number indicate whether the current tension reaction force grid node to be inserted is located inside or outside the rectangular net. The recording of the four vertex numbers corresponding to each rectangle and the numbers of the four adjacent rectangles includes: if the rectangle is located inside the rectangular net, there are four adjacent rectangles; if the rectangle is located at the edge of the rectangular net, there are 1 or 2 adjacent rectangles.

9. The tensioning method of the chain tensioning mechanism according to claim 7, characterized in that: In step 2, the nonlinear interpolation weight coefficients of all rectangles are calculated and saved at one time, including: Calculate and save the interpolation weight coefficients α, β, δ of all rectangles at once; If b1≠b4, then: If b1≠b4, then: In the formula, A(a1, b1, c1), B(a2, b2, c2), C(a3, b3, c3), and D(a4, b4, c4) represent the coordinates of the four vertices of the rectangle.

10. The tensioning method of the chain tensioning mechanism according to claim 7, characterized in that: In step 3, the rectangle where the current tension reaction force node is to be inserted is quickly approached and located, including: (1) Given the current tension reaction force node P to be inserted and the main judgment rectangle, the four vertices of which are recorded as: P1, P2, P3, P4; (2) Take vertices P1, P2 and the current tension reaction force node P to be inserted to form a vector and When the vector product , determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1). If it is not -1, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2). If the vector product If not, execute step (3); (3) When the vector product When the vertices P2 and P3 are taken together with the current tension reaction force node P to be inserted, a vector is formed. and When the vector product , determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1); if it is not -1, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (4); (4) When the vector product When , the vertices P3 and P1 are taken to form a vector with the current tension reaction force node P to be inserted and When the vector product Determine whether the number of the rectangle adjacent to the P3P1 side is -1. If it is -1, return to step (1). If it is not -1, take the rectangle adjacent to the P3P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (5); When the vector product When , the vertices P4 and P1 are taken to form a vector with the current tension reaction force node P to be inserted and When the vector product Determine whether the number of the rectangle adjacent to the P4P1 side is -1. If it is -1, return to step (1). If it is not -1, take the rectangle adjacent to the P4P1 side as the new main judgment rectangle and repeat step (2); vector product If not, proceed to step (5); (5) When the vector product When the main judgment rectangle and the vector determined by the current tension reaction force node P to be inserted Cross product condition The conditions are met at the same time. At this time, point P is located inside or on one of the four sides of the main judgment rectangle. The main judgment rectangle is the rectangle where point P is located. When the vector product When the main judgment rectangle and the vector determined by the current tension reaction force node P to be inserted Cross product condition The conditions are satisfied at the same time. At this time, point P is located inside or on one of the four sides of the main judgment rectangle. The main judgment rectangle is the rectangle where point P is located.

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