Circulating conveying line

Abstract

The utility model discloses a circulating conveying line, and belongs to the technical field of conveying lines. Comprising annular guide rails symmetrically fixed on two sides of a frame; the tray mechanism is slidably connected with the annular guide rail; the driving mechanism drives the tray mechanism to move on the annular guide rail; the stopping mechanism is used for stopping the tray mechanism; and the positioning mechanism is used for positioning the tray mechanism. The tray conveying device has the advantages that the driving motor drives the tray through cooperation of the chain and the chain wheel, the tray moving precision is improved, the stopping mechanism and the positioning assembly are arranged, the tray positioning precision is guaranteed, and therefore normal automatic production is guaranteed; a motor torque protection mechanism is arranged, when the motor is overloaded, automatic shutdown is achieved, and the motor is protected against damage; and the tensioning mechanism is arranged, so that the tensioning adjustment of the driving chain can be realized, and the normal transmission of the chain is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of circulating conveying line, belong to conveying line technical field. BACKGROUND

[0002] In automated industrial production, conveying line for material turnover is indispensable, through the use of automatic production line, it can save a lot of manpower and material resources for enterprise, thereby greatly reducing production cost.Traditional conveying line is mostly driven by belt, and the belt is prone to skidding, which results in low positioning accuracy of the conveying line and affects the normal operation of automated production. UTILITY MODEL CONTENT

[0003] To solve the defects in the prior art, the utility model aims to provide a circulating conveying line, which uses chain instead of belt, and is equipped with a stop mechanism and a positioning mechanism to ensure the movement accuracy of the tray mechanism and the normal operation of automated production.

[0004] The technical scheme of the utility model is as follows: a circulating conveying line comprises:

[0005] An annular guide rail is symmetrically fixed on both sides of the frame.

[0006] A tray mechanism is slidably connected to the annular guide rail.

[0007] A driving mechanism drives the tray mechanism to move on the annular guide rail.

[0008] A stop mechanism stops the tray mechanism.

[0009] A positioning mechanism positions the tray mechanism.

[0010] The driving mechanism comprises a driving motor, the output end of the driving motor is connected to a driving shaft through a speed reducer, a driving pulley and a driving sprocket are fixed on the driving shaft, the two ends of a driving chain are engaged with the driving sprocket and a driven sprocket, the driving chain drives the tray mechanism to move along the annular guide rail, a plurality of telescopic driving columns are uniformly distributed on the outer periphery of the driving pulley, the driving columns penetrate through the shaft sleeve fixed in the driving pulley in the radial direction of the driving pulley, the driving columns are connected to limiting blocks, the limiting blocks are in separable contact with the shaft sleeve, an inner cavity for accommodating the limiting blocks and limiting springs is formed in the driving pulley, and the two ends of the limiting springs are respectively connected to the limiting blocks and the inner cavity wall.

[0011] The frame is provided with a motor torque protection mechanism for protecting the driving motor from overload, which comprises a detection sensor for monitoring the position of a torque arm, a controller connected to the detection sensor for controlling the start and stop of the driving motor, a reducer connected to the torque arm, the detection sensor is fixed on a support, the support is fixed on the bottom of the base, the top end of the sleeve is fixed on the top plate of the base, the top end of the compression spring is connected with the inner top of the sleeve, the bottom end of the compression spring is crimped on the torque arm, the adjusting bolt penetrates the top plate, the sleeve, the compression spring, the torque arm and the bottom plate of the base from top to bottom in sequence, and the bottom plate is provided with a nut connected with the adjusting bolt.

[0012] The driving sprocket is a double-row driving sprocket, the driving chain is a three-row driving chain, the double-row driving sprocket is engaged with the side driving chains on both sides of the three-row driving chain, and the frame is provided with wear-resistant support strips for supporting the three-row driving chain.

[0013] The tray mechanism comprises a tray plate and side plates fixed on both sides of the tray plate, the side plates are provided with rollers clamped at both ends of the annular guide rail and in rolling connection with the annular guide rail, positioning blocks are further fixed on both sides of the tray plate, the positioning end of each positioning block is provided with an arc-shaped notch, a driving insertion hole matched with the driving column is formed in the arc-shaped notch, the middle driving chain in the three-row driving chain is engaged with the accumulation pulley, the accumulation pulley is rotatably connected to a shaft, the shaft is fixed on the tray plate through the mounting side plates at both ends of the shaft, an accumulation force adjusting nut and an accumulation force adjusting spring are arranged between the accumulation pulley and the mounting side plate on one side, the accumulation force adjusting nut is threadedly connected to the shaft, and the accumulation force adjusting spring is connected to the accumulation force adjusting nut and a friction plate at both ends respectively, and the friction plate is in contact with the accumulation pulley.

[0014] The stop mechanism comprises a stop mechanism a matched with the positioning mechanism and a stop mechanism b matched with the driving rotating wheel.

[0015] The stop plate on the stop mechanism a is matched with a stop plate fixed on the tray plate, and the stop plate is arranged on the moving path of the stop plate in an extendable manner.

[0016] The stop mechanism b comprises a stop pendulum arm, the stop end of the stop pendulum arm is provided with a stop inclined surface, the stop pendulum arm is rotatably connected to a stop base through a rotating shaft, a stop spring is connected to the stop pendulum arm and the stop base at both ends respectively, a limiting frame for limiting the rotation overstroke of the stop pendulum arm is fixed on the stop base, and the stop base is fixed on the frame.

[0017] The positioning mechanism comprises a positioning guide rail fixed on a positioning base, a positioning plate is slidably connected to the positioning guide rail through a sliding block, a positioning cylinder is fixed on the positioning base, and an output end of the positioning cylinder is connected to the positioning plate, and a positioning groove is arranged at the positioning end of the positioning plate and used for positioning a positioning column on the side plate.

[0018] The frame is provided with a tensioning mechanism for tensioning the driving chain, and the tensioning mechanism specifically comprises a tensioning mounting box, a plurality of fixed rotating shafts penetrating through positions of the tensioning mounting box, a fixed tensioning idler wheel being rotationally connected to the tensioning mounting box through the fixed rotating shafts, and a movable tensioning idler wheel being rotationally connected to a moving seat through a movable rotating shaft, the movable rotating shaft penetrating through and being movable along a strip-shaped hole of the tensioning mounting box, and an end of the movable rotating shaft being connected with a pointer, and an end of the pointer being provided with a scale fixed to the tensioning mounting box, the moving seat being connected with a tensioning screw, the tensioning screw extending out of the tensioning mounting box, a tensioning sleeve being fixed to the outside of the tensioning mounting box, the tensioning screw penetrating through the tensioning sleeve, a tensioning spring being sleeved outside the tensioning sleeve, and the tensioning spring being connected with the tensioning sleeve and a tensioning nut at two ends, respectively, and the tensioning nut being threadedly connected with the tensioning screw.

[0019] The utility model discloses the beneficial effect is: drive motor is through chain sprocket cooperation and is driven to the tray, improves the tray movement precision, sets up the stop mechanism and the positioning component, guarantees the positioning precision of tray, thereby guaranteeing the normal operation of automation production, set up motor torque protection mechanism, when the motor overload, automatic shutdown, protect the motor from being damaged, set up tensioning mechanism, can realize the tensioning adjustment of driving chain, guarantees the normal transmission of chain. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structural drawing of the utility model;

[0021] Figure 2 It is the internal structure drawing of the utility model;

[0022] Figure 3 It is the local view of the utility model;

[0023] Figure 4 It is the sectional view of the utility model;

[0024] Figure 5 It is the structure drawing of tray mechanism;

[0025] Figure 6 It is the structure drawing of driving runner;

[0026] Figure 7 It is the structure drawing of stop mechanism b;

[0027] Figure 8 It is the structure drawing of positioning mechanism;

[0028] Figure 9 It is the structure of tensioning mechanism Figure 1 ;

[0029] Figure 10 It is the structure of tensioning mechanism Figure 2 .

[0030] The figure marks are as follows: 1, annular guide rail, 2, tray mechanism, 2.1, tray plate, 2.2, side plate, 2.3, positioning block, 2.4, driving socket, 2.5, accumulation belt wheel, 2.6, shaft, 2.7, mounting side plate, 2.8, accumulation force adjusting nut, 2.9, accumulation force adjusting spring, 2.10, friction plate, 2.11, baffle, 2.12, positioning column, 2.13, roller, 3.1, driving motor, 3.2, driving shaft, 3.3, driving rotary wheel, 3.4, driving sprocket, 3.5, driven sprocket, 3.6, driving column, 3.7, limiting block, 3.8, shaft sleeve, 3.9, limiting spring, 3.10, driving chain, 4.1, torque arm, 4.2, detection sensor, 4.3, support, 4.4, base, 4.5, sleeve, 4.6, compression spring, 4.7, adjusting bolt, 5, stop mechanism a, 5.1, stop plate, 6, frame, 7, stop mechanism b, 7.1, stop base, 7.2, stop swing arm, 7.3, limiting frame, 7.4, stop spring, 7.5, rotating shaft, 8.1, positioning base, 8.2, positioning guide rail, 8.3, sliding block, 8.4, positioning plate, 8.5, positioning cylinder, 8.6, positioning groove, 9.1, tensioning mounting box, 9.2, fixed tensioning idler, 9.3, movable tensioning idler, 9.4, moving seat, 9.5, pointer, 9.6, scale, 9.7, tensioning screw, 9.8, tensioning sleeve, 9.9, tensioning spring, 9.10, tensioning nut. DETAILED DESCRIPTION

[0031] The accompanying drawings are described below Figures 1-10 Further description of the utility model is as follows:

[0032] A circulating conveying line, comprising annular guide rails 1 symmetrically arranged on both sides of a frame 6, a tray mechanism 2 is slidably connected to the annular guide rails 1 under the action of a driving mechanism, and the frame 6 is further provided with a stop mechanism and a positioning mechanism, which are respectively used for stopping and positioning the tray mechanism.

[0033] The driving mechanism comprises a driving motor 3.1, the output end of the driving motor 3.1 is connected with a driving shaft 3.2 through a speed reducer, a driving rotary wheel 3.3 and a driving sprocket 3.4 are fixed on the driving shaft 3.2, two ends of a driving chain 3.10 are engaged with the driving sprocket 3.4 and a driven sprocket 3.5, the driving chain 3.10 drives the tray mechanism 2 to move along the annular guide rail 1, the driving sprocket 3.4 is a double-row driving sprocket, the driving chain 3.10 is a three-row driving chain, the double-row driving sprocket is engaged with the side driving chains on the two sides of the three-row driving chain, a wear-resistant support strip for supporting the three-row driving chain is arranged on the frame 6, the material of the wear-resistant support strip is preferably polyurethane, and the wear-resistant support strip can also reduce friction. A plurality of telescopic driving columns 3.6 are uniformly distributed on the outer periphery of the driving rotary wheel 3.3, the driving columns 3.6 penetrate through the shaft sleeve 3.8 in the driving rotary wheel 3.3 in the radial direction, the driving columns 3.6 are connected with limiting blocks 3.7, the limiting blocks 3.7 are in separable contact with the shaft sleeve 3.8, an inner cavity for accommodating the limiting blocks 3.7 and limiting springs 3.9 is formed in the driving rotary wheel 3.3, and the limiting springs 3.9 are respectively connected with the limiting blocks 3.7 and the inner cavity wall at two ends.

[0034] The tray mechanism 2 comprises a tray plate 2.1 and side plates 2.2 fixed on the two sides of the tray plate 2.1, the side plates 2.2 are provided with rollers 2.13 clamped at the two ends of the annular guide rail 1 and in rolling connection with the annular guide rail 1, positioning blocks 2.3 are further fixed on the two sides of the tray plate 2.1, the positioning end of the positioning block 2.3 is provided with an arc-shaped notch, a driving insertion hole 2.4 matched with the driving column 3.6 is formed in the arc-shaped notch, the middle driving chain in the three-row driving chain is engaged with an accumulation belt wheel 2.5, so as to avoid the interference between the accumulation belt wheel 2.5 and the driving sprocket 3.4, the accumulation belt wheel 2.5 is rotationally connected with a shaft 2.6, the two ends of the shaft 2.6 are fixed on the tray plate 2.1 through mounting side plates 2.7, an accumulation force adjusting nut 2.8 and an accumulation force adjusting spring 2.9 are arranged between the accumulation belt wheel 2.5 and the mounting side plate 2.7 on one side, the accumulation force adjusting nut 2.8 is threadedly connected with the shaft 2.6, and the two ends of the accumulation force adjusting spring 2.9 are respectively connected with the accumulation force adjusting nut 2.8 and a friction plate 2.10, the friction plate 2.10 is in contact with the accumulation belt wheel 2.5.

[0035] The stop mechanism includes a stop mechanism a5 matched with the positioning mechanism, and a stop mechanism b7 matched with the driving rotating wheel 3.3. The stop plate 5.1 on the stop mechanism a5 is matched with the stop plate 2.11 fixed on the supporting plate 2.1, and the stop plate 5.1 is arranged on the moving path of the stop plate 2.11 in an extendable manner. The stop mechanism a5 is a prior art, and the specific structure of the stop mechanism a5 is disclosed in the patent with the publication number CN209455627U, and the present application will not be described again. The stop mechanism b7 includes a stop swing arm 7.2, the stop end of the stop swing arm 7.2 is provided with a stop inclined surface, the stop swing arm 7.2 is rotationally connected with a stop base 7.1 through a rotating shaft 7.5, a stop spring 7.4 is connected with the stop swing arm 7.2 and the stop base 7.1 at both ends, respectively, a limiting frame 7.3 for limiting the rotation overstroke of the stop swing arm 7.2 is fixed on the stop base 7.1, and the stop base 7.1 is fixed on the frame 6.

[0036] The positioning mechanism includes a positioning guide rail 8.2 fixed on a positioning base 8.1, a positioning plate 8.4 is slidingly connected with the positioning guide rail 8.2 through a sliding block 8.3, a positioning cylinder 8.5 is fixed on the positioning base 8.1, an output end of the positioning cylinder 8.5 is connected with the positioning plate 8.4, and a positioning end of the positioning plate 8.4 is provided with a positioning groove 8.6 for positioning a positioning column 2.12 on the side plate 2.2.

[0037] The accurate positioning of the tray mechanism 2 on the ring-shaped guide rail 1 is achieved through two actions: stopping and positioning. The stopping action is completed by the stopping mechanism a5. Specifically, the cylinder drives the stopping plate 5.1 to rise, so that the stopping plate 5.1 rises to the moving path of the stopping plate 2.11. When the stopping plate 2.11 moves to the stopping plate 5.1, the two plates contact, and the stopping plate 5.1 blocks the continuous movement of the stopping plate 2.11, i.e., the tray mechanism 2 as a whole stops moving, and the driving sprocket 3.4 drives the accumulation and release pulley 2.5 to overcome the resistance of the friction plate 2.10. The positioning action is specifically that the positioning cylinder 8.5 drives the positioning plate 8.4 to move upward along the positioning guide rail 8.2, and the positioning slot 8.6 at the top end of the positioning plate 8.4 is inserted into the positioning column 2.12 of the tray mechanism 2, i.e., the positioning column 2.12 is located in the positioning slot 8.6, so that the relative position between the positioning slot 8.6 and the positioning column 2.12 is fixed, achieving the purpose of accurate positioning of the tray mechanism 2. When it is necessary to release the tray mechanism 2, the positioning cylinder 8.5 drives the positioning plate 8.4 to move downward, and the cylinder drives the stopping plate 5.1 to move downward and away from the moving path of the stopping plate 2.11, so that the tray mechanism 2 can continue to move along the ring-shaped guide rail 1 under the driving of the driving chain 3.10. The power of the tray mechanism 2 is the friction force between the accumulation and release pulley 2.5 and the friction plate 2.10. When the tray mechanism 2 is turned over, its gravity is greater than the friction force, which will cause the turning speed to be too fast. At this time, the movement of the tray mechanism 2 is not controlled by the driving motor 3.1, causing the movement of the tray mechanism 2 to be synchronized with the operation of the driving motor 3.1, so that the position of the tray mechanism 2 on the driving chain 3.10 cannot be accurately controlled. In order to avoid the above phenomenon, the driving rotary wheel 3.4 is arranged, and the driving motor 3.1 controls the synchronization of the movement of the tray mechanism 2 through the driving rotary wheel 3.4. The tray mechanism 2 is driven to turn downward by the driving rotary wheel 3.3, and the driving rotary wheel 3.3 is inserted into the driving insertion hole 2.4 of the tray mechanism 2 through the driving column 3.6 on the outer periphery, so as to drive the tray mechanism 2. In order to ensure that the driving column 3.6 can be smoothly inserted into the driving insertion hole 2.4, the tray mechanism 2 needs to stop moving before turning over, i.e., the stopping action is performed by the stopping mechanism b7. The specific action process of the above stopping and driving is as follows: when the positioning column 2.12 at the bottom of the tray mechanism 2 passes through the stopping inclined surface of the stopping swing arm 7.2, it is blocked by the stopping inclined surface, so that the tray mechanism 2 cannot move. The driving rotary wheel 3.3 is located at the arc-shaped slot of the positioning block 2.3 and is in a rotating state, and the driving column 3.6 enters the arc-shaped slot and is compressed. When it is rotated to be opposite to the driving insertion hole 2.4, the driving column 3.6 extends and is inserted into the driving insertion hole 2.4. The driving column 3.6 drives the positioning column 2.12 of the tray mechanism 2 to move along the stopping inclined surface, and the stopping swing arm 7.2 is compressed by the stopping spring 7.4. After the positioning column 2.12 is separated from the stopping inclined surface, the stopping swing arm 7.2 is reset. The tray mechanism 2 is driven to turn over by the positioning column 2.12 of the driving rotary wheel 3.3.

[0038] The frame 6 is provided with a motor torque protection mechanism for overload protection of the driving motor 3.1, which comprises a detection sensor 4.2 for monitoring the position of the torque arm 4.1, the detection sensor 4.2 being connected to a controller for controlling the start and stop of the driving motor 3.1, the torque arm 4.1 being connected to a speed reducer, the detection sensor 4.2 being fixed on a bracket 4.3, the bracket 4.3 being fixed on the bottom of a base 4.4, a sleeve 4.5 being fixed on the top plate of the base 4.4 at the top end, a compression spring 4.6 being connected to the inner top of the sleeve 4.5 at the top end, the bottom end of the compression spring 4.6 being crimped on the torque arm 4.1, an adjusting bolt 4.7 being sequentially penetrated from top to bottom through the top plate, the sleeve 4.5, the compression spring 4.6, the torque arm 4.1 and the bottom plate of the base 4.4, and the bottom plate being provided with a nut connected with the adjusting bolt. Figure 3 As shown in the figure, the driving motor 3.1 drives the driving chain 3.10 to rotate counterclockwise, when the motor is overloaded, the driving shaft 3.2 cannot normally rotate counterclockwise, at this time the driving motor 3.1 and the speed reducer will rotate clockwise around the driving shaft 3.2, driving the torque arm 4.1 to rotate clockwise, the torque arm 4.1 rotates out of the detection range of the detection sensor 4.2, the detection sensor 4.2 sends a signal to the controller, the controller sends a stop instruction to the driving motor 3.1, the driving motor 3.1 stops running, realizing the overload protection of the driving motor 3.1.

[0039] The frame 6 is provided with a tensioning mechanism for tensioning the driving chain 3.10, which specifically comprises a tensioning mounting box 9.1, a plurality of fixed rotating shafts are penetrated through the tensioning mounting box 9.1, a fixed tensioning idler 9.2 is rotatably connected in the tensioning mounting box 9.1 through the fixed rotating shaft, a movable tensioning idler 9.3 is rotatably connected on a moving seat 9.4 through a movable rotating shaft, the movable rotating shaft is penetrated through and movable along the strip-shaped hole on the tensioning mounting box 9.1, the end of the movable rotating shaft is connected with a pointer 9.5, the end of the pointer 9.5 is provided with a scale 9.6 fixed on the tensioning mounting box 9.1, the moving seat 9.4 is connected with a tensioning screw 9.7, the tensioning screw 9.7 extends out of the tensioning mounting box 9.1, a tensioning sleeve 9.8 is fixed outside the tensioning mounting box 9.1, the tensioning screw 9.7 is penetrated through the tensioning sleeve 9.8, a tensioning spring 9.9 is sleeved outside the tensioning sleeve 9.8, the two ends of the tensioning spring 9.9 are respectively connected with the tensioning sleeve 9.8 and a tensioning nut 9.10, the tensioning nut 9.10 is threadedly connected with the tensioning screw 9.7. When the driving sprocket 3.4 is loose, it will cause the chain to skip teeth, in order to avoid the above phenomenon, the tensioning mechanism of the chain is set, as shown in the figure. Figure 9 and Figure 10As shown, during the tensioning operation, the tensioning nut 9.10 is moved to the left, the tensioning spring 9.9 is compressed, the elastic force is increased, the tensioning nut 9.10 is pushed to move the tensioning screw 9.7 to the right, the tensioning screw 9.7 drives the movable tensioning idler 9.3 to move to the right, the distance between the movable tensioning idler 9.3 and the fixed tensioning idler 9.2 on the left is increased, the tensioning of the driving sprocket 3.4 is realized, and the tensioning of the tensioning spring 9.9 can be understood and accurately adjusted by observing the pointing position of the pointer 9.5 on the scale 9.6.

[0040] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A circulating conveyor line, characterized in that, The utility model relates to a kind of automatic warehouse, including: Annular guide rail (1), symmetrically fixed on both sides of frame (6); Tray mechanism (2), slidingly connected annular guide rail (1); Driving mechanism, drive tray mechanism (2) moves on annular guide rail (1); Stop mechanism, stop tray mechanism (2); The driving mechanism includes driving motor (3.1), driving motor (3.1) output end is connected driving shaft (3.2) by speed reducer, driving runner (3.3) and driving sprocket (3.4) are fixed on the driving shaft (3.2), driving chain (3.10) both ends engage driving sprocket (3.4) and driven sprocket (3.5), driving chain (3.10) drives tray mechanism (2) and moves along annular guide rail (1), the driving runner (3.3) outer periphery is evenly distributed with several telescopic driving column (3.6), the driving column (3.6) is along driving runner (3.3) radial and is fixed in the shaft sleeve (3.8) in driving runner (3.3), driving column (3.6) is connected with limit block (3.7), limit block (3.7) is separable with shaft sleeve (3.8) contact, driving runner (3.3) is opened with the inner cavity for accommodating limit block (3.7) and limit spring (3.9), the limit spring (3.9) both ends are connected with limit block (3.7) and inner cavity wall respectively; The driving sprocket (3.4) is double-row driving sprocket, driving chain (3.10) is three-row driving chain, double-row driving sprocket is engaged with the side driving chain of two sides in three-row driving chain, and wear-resistant support bar for supporting the three-row driving chain is provided on the frame (6); The tray mechanism (2) includes, tray (2.1) and the side plate (2.2) fixed on both sides of tray (2.1), the side plate (2.2) is equipped with the gyro wheel (2.13) clamped in both ends of annular guide rail (1) and is rolled with annular guide rail (1) connection, and the side plate (2.2) is also fixed with the positioning block (2.3) on both sides of tray (2.1), and the positioning end of positioning block (2.3) is equipped with arc notch, the arc notch is opened with the driving jack (2.4) matched with the driving column (3.6), the middle driving chain in the three-row driving chain is engaged with the accumulation and release pulley (2.5), the accumulation and release pulley (2.5) is rotatably connected on the shaft (2.6), the shaft (2.6) both ends are fixed on tray (2.1) through mounting side plate (2.7), and the accumulation and release pulley (2.5) is equipped with accumulation and release force adjusting nut (2.8) and accumulation and release force adjusting spring (2.9) between one side mounting side plate (2.7), the accumulation and release force adjusting nut (2.8) is screwed on the shaft (2.6), and the accumulation and release force adjusting spring (2.9) both ends are connected with accumulation and release force adjusting nut (2.8) and friction plate (2.10) respectively, and the friction plate (2.10) is contacted with accumulation and release pulley (2.5); The stop mechanism includes stop mechanism a (5) matched with positioning mechanism, and stop mechanism b (7) matched with driving runner (3.3); ​ The stop plate (5.1) on the stop mechanism a (5) cooperates with the stop plate (2.11) fixed on the supporting plate (2.1), and the stop plate (5.1) is retractably arranged on the moving path of the stop plate (2.11); The stop mechanism b (7) comprises a stop swing arm (7.2), the stop end of the stop swing arm (7.2) is provided with a stop inclined surface, the stop swing arm (7.2) is rotationally connected with a stop base (7.1) through a rotating shaft (7.5), a stop spring (7.4) has two ends connected with the stop swing arm (7.2) and the stop base (7.1) respectively, the stop base (7.1) is fixed with a limiting frame (7.3) for limiting the swing of the stop swing arm (7.2) beyond the stroke, and the stop base (7.1) is fixed on the frame (6); The positioning mechanism comprises a positioning guide rail (8.2) fixed on a positioning base (8.1), a positioning plate (8.4) is slidably connected with the positioning guide rail (8.2) through a sliding block (8.3), a positioning cylinder (8.5) is fixed on the positioning base (8.1), and an output end of the positioning cylinder (8.5) is connected with the positioning plate (8.4); and the positioning end of the positioning plate (8.4) is provided with a positioning groove (8.6), and the positioning groove (8.6) is used for positioning the positioning column (2.12) on the side plate (2.2).

2. The endless conveyor line according to claim 1, characterized in that The frame (6) is provided with a motor torque protection mechanism for overload protection of the driving motor (3.1), the motor torque protection mechanism comprises a detection sensor (4.2) for monitoring the position of a torque arm (4.1), the detection sensor (4.2) is connected with a controller for controlling the start and stop of the driving motor (3.1), the torque arm (4.1) is connected with a speed reducer, the detection sensor (4.2) is fixed on a support (4.3), the support (4.3) is fixed on the bottom of a base (4.4), a sleeve (4.5) is fixed at the top of the base (4.4), a compression spring (4.6) has a top end connected with the inner top of the sleeve (4.5), a bottom end of the compression spring (4.6) is crimped on the torque arm (4.1), an adjusting bolt (4.7) penetrates the top plate, the sleeve (4.5), the compression spring (4.6), the torque arm (4.1) and the bottom plate of the base (4.4) from top to bottom in sequence, and the bottom plate is provided with a nut connected with the adjusting bolt.

3. The endless conveyor line of claim 1, wherein, The frame (6) is provided with a tensioning mechanism for tensioning the driving chain (3.10), which specifically comprises a tensioning mounting box (9.1), a plurality of fixed rotating shafts penetrating through the tensioning mounting box (9.1), a fixed tensioning idler wheel (9.2) being rotatably connected to the tensioning mounting box (9.1) through the fixed rotating shafts, a movable tensioning idler wheel (9.3) being rotatably connected to a movable seat (9.4) through a movable rotating shaft, the movable rotating shaft penetrating through and being movable along a strip-shaped hole on the tensioning mounting box (9.1), an end of the movable rotating shaft being connected to a pointer (9.5), an end of the pointer (9.5) being provided with a scale (9.6) fixed on the tensioning mounting box (9.1), the movable seat (9.4) being connected to a tensioning screw (9.7), the tensioning screw (9.7) extending out of the tensioning mounting box (9.1), a tensioning sleeve (9.8) being fixed outside the tensioning mounting box (9.1), the tensioning screw (9.7) penetrating through the tensioning sleeve (9.8), a tensioning spring (9.9) being sleeved outside the tensioning sleeve (9.8), two ends of the tensioning spring (9.9) being respectively connected to the tensioning sleeve (9.8) and a tensioning nut (9.10), and the tensioning nut (9.10) being threadedly connected to the tensioning screw (9.7).

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