Synchronous gear rack type tensioning trolley for relay belt conveyor of chain bucket ship unloader

Abstract

The utility model discloses a synchromesh gear rack type tensioning trolley for a chain bucket ship unloader relay belt conveyor, which comprises a synchromesh gear rack mechanism, the synchromesh gear rack mechanism comprises racks, gears and gear shafts, two sides of a trolley track are respectively and fixedly connected with the racks, and the gears are connected with the gear shafts. The lower end of the tensioning trolley is in sliding connection with the gear shaft through a one-way limiting sliding block mechanism, the one-way limiting sliding block mechanism is used for limiting the tensioning trolley to only move up and down relative to the gear shaft, the two ends of the gear shaft are fixedly connected with gears respectively, and the gears are correspondingly connected with the racks on the same side in a meshed mode respectively. When the tensioning trolley is used, the synchronous gear and rack mechanism is arranged, so that the situation that a belt deviates during running can be avoided when the tensioning trolley moves; and through the arrangement of the one-way limiting sliding block mechanism, it is further guaranteed that the tensioning trolley moves in the designated direction, and the situation that when the tensioning trolley bounces up and down, a gear shaft of the synchronous gear and rack mechanism is damaged is avoided.

Description

Technical Field

[0001] The utility model relates to a tensioning device for a relay belt conveyor of a chain bucket ship unloader, in particular to a synchronous gear rack type tensioning trolley for the relay belt conveyor of the chain bucket ship unloader. Background Art

[0002] The chain bucket ship unloader relay belt conveyor is a continuous transport machine used on the chain bucket ship unloader to relay the bulk cargo unloaded from the ship cabin by the chain bucket ship unloader to the rear receiving device. It is mainly composed of a conveyor belt, a roller, a tensioning device, a bracket, a conveyor belt cleaner, a driving device, etc. Among various types of relay belt conveyors, the main working part is the flexible conveyor belt; in order to ensure that the conveyor belt can always maintain a certain tension during operation, compensate for the shaping elongation of the conveyor belt and the elastic elongation under transition conditions, and provide the necessary travel for the conveyor belt to reconnect, a conveyor belt tensioning device is provided. The tensioning device is generally composed of a tensioning roller, a tensioning force system, etc. The tensioning force system provides tensioning force for the tensioning roller, thereby tensioning the conveyor belt.

[0003] At present, in order to keep the tension force constant, the commonly used tension force system solution is the counterweight tensioning system, which connects the gravity counterweight through the tensioning wire rope at both ends of the tensioning roller to tension the conveyor belt. In this case, the tensioning roller needs to be movable. During the operation of the relay belt conveyor, due to the unbalanced tension on both sides of the tensioning roller, the position changes of the two ends of the roller axis may be different, causing the direction of the tensioning roller axis to change, and then causing the conveyor belt to deviate. After the tensioning roller axis deflects, the moving belt will deviate. In order to avoid the axis deflection of the movable tensioning roller during the operation of the relay belt conveyor and cause the conveyor belt to deviate, the current better solution is to install the tensioning roller on a tensioning trolley, as shown in the attached figure. Figure 8 As shown, a wheel with a rim is provided on the tensioning trolley, and a track parallel to the longitudinal axis of the relay belt conveyor is provided at the lower part of the wheel. The tensioning roller can move with the trolley, and the tensioning trolley can be restricted from running on the track by designs such as anti-rollers. However, in actual design and manufacturing, considering the accuracy of manufacturing and installation, the stress deformation of various structural parts, etc., in order to avoid the wheel jamming caused by the small gap between the rim of the trolley and the track, it is necessary to leave a gap of about 10 mm between the rim of the wheel and the track. This gap causes the movement direction of the tensioning trolley to not be strictly restricted, and the axis of the tensioning roller may deflect at a certain angle during the movement. At the same time, when the tensioning trolley moves, there is still a situation where it bounces up and down due to the action of external force, which causes the direction to deflect, resulting in the problem of belt deviation.

[0004] Therefore, there is an urgent need for a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor to solve the problem of belt deviation when the tensioning trolley moves. Utility Model Content

[0005] The utility model aims at the deficiencies in the prior art and provides a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor to solve the problem of belt deviation when the tensioning trolley moves.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor, comprising a tensioning trolley and a trolley track, wherein the tensioning trolley is slidably arranged on the trolley track, and a tensioning roller is provided on the tensioning trolley, characterized in that it also includes a synchronous rack and pinion mechanism, wherein the synchronous rack and pinion mechanism comprises a rack, a gear and a gear shaft, and a rack is fixedly connected to each side of the trolley track, and the lower end of the tensioning trolley is slidably connected to the gear shaft through a one-way limiting slider mechanism, and the one-way limiting slider mechanism is used to limit the tensioning trolley to only be able to move up and down with the gear shaft, and a gear is fixedly connected to each end of the gear shaft, and the gears are respectively meshed with the racks on the same side.

[0008] To optimize the above technical solutions, the specific measures taken also include:

[0009] Furthermore, the one-way limit slider mechanism includes a limit block, a first gear shaft bearing and a slider. At least one group of two limit blocks are vertically provided at the lower end of the tensioning trolley. A slider is rotatably connected to the gear shaft through the first gear shaft bearing. The slider is slidably arranged between the two limit blocks at the lower end of the tensioning trolley, and the slider can only move up and down along the limit block.

[0010] Furthermore, a groove having the same width as that of the sliding block is provided in the middle of the limiting block, the surfaces of the two limiting blocks provided with the grooves are arranged opposite to each other, and the sliding block is slidably arranged in the grooves of the two limiting blocks.

[0011] Furthermore, a group of two limit blocks at the lower end of the tensioning trolley are arranged in the middle of the tensioning trolley, and the sliding block is correspondingly arranged in the middle of the gear shaft through the first gear shaft bearing.

[0012] Furthermore, two groups of limit blocks are provided at the lower end of the tensioning trolley, each group of limit blocks consists of two blocks, and the two groups of limit blocks are symmetrically arranged on both sides of the tensioning trolley. Two groups of first gear shaft bearings and sliders are arranged on the gear shaft corresponding to the two groups of limit blocks, and the two sliders are slidably arranged in the two groups of limit blocks respectively.

[0013] Furthermore, the gear shaft and the gear are fixedly connected via a flat key.

[0014] Furthermore, it also includes a roller track limiting mechanism, which includes a roller group and a strip track, and the two sides of the two racks that are far away from each other are respectively connected in parallel with a strip track, and both ends of the gear shaft are respectively extended with a connecting shaft, and a roller group is rotatably connected to the connecting shaft, and the roller group is correspondingly slidably arranged in the strip track on the same side.

[0015] Furthermore, the roller group includes two triangular plate-shaped roller supports and three rollers, the three corners of the two triangular plate-shaped roller supports are respectively rotatably connected to a roller, and the connecting shaft is rotatably connected to the center of the two roller supports through the second gear shaft bearing.

[0016] Furthermore, the interior of the strip-shaped raceway is configured as an upper raceway and a lower raceway, the triangular plate-shaped roller support is configured with a pointed angle pointing upward, the upper ends of the two roller supports are rotatably connected to a roller, and are connected to the upper raceway through a roller located at the upper end, and the lower ends of the two roller supports are connected to two rollers, and are connected to the lower raceway through two rollers located at the lower end.

[0017] Furthermore, the two roller supports are fixedly connected via a roller shaft, and the roller is rotatably arranged on the roller shaft via a roller bearing.

[0018] The beneficial effects of the utility model are:

[0019] When the utility model is in use, through the setting of the synchronous gear rack mechanism, the connection between the tensioning trolley and the gear shaft, and the matching setting of the rack and the gear at both ends of the gear shaft can ensure that the tensioning trolley can move according to the trajectory of the rack when moving, thereby avoiding the belt running deviation; at the same time, through the setting of the one-way limit slider mechanism, the tensioning trolley and the gear shaft are limited to only an up and down displacement relationship. In this way, when in use, it can not only further ensure that the tensioning trolley moves in a specified direction, further avoiding the belt running deviation, but also avoid the tensioning trolley from bouncing up and down under the action of external force. The gear shaft and other structures of the synchronous gear rack mechanism will not be damaged, the rigid impact between the structures is reduced, and the safety and service life of the device are further increased.

[0020] The utility model can limit the horizontal movement distance of both sides of the tensioning trolley through the synchronous gear rack mechanism, and can ensure that the tensioning trolley moves along the axis of the belt conveyor. Its direction does not deflect during use. Because the tensioning roller is installed on the tensioning trolley, the belt running deviation caused by the direction deflection when the tensioning trolley moves can be avoided. The tensioning trolley and the trolley track can be manufactured and installed in the original way, and sufficient margin is left, so that the tensioning trolley can move smoothly and without jamming in the direction of the belt conveyor axis. The synchronous gear rack mechanism does not require additional external power, works reliably and has good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view of a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor proposed by the utility model;

[0022] Figure 2 This is a top view of the overall structure of a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor proposed by the utility model;

[0023] Figure 3 This is a structural schematic diagram of a synchronous rack and pinion mechanism of a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor proposed by the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of a gear rack of a synchronous gear rack type tensioning trolley for a chain bucket ship unloader relay belt conveyor proposed by the utility model;

[0025] Figure 5 This is a schematic structural diagram of a roller track limiting mechanism of a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor proposed by the utility model;

[0026] Figure 6 This is a structural schematic diagram of a one-way limiting slider mechanism of a synchronous gear rack type tensioning trolley for a chain bucket ship unloader relay belt conveyor proposed by the utility model;

[0027] Figure 7 A top view of a one-way limiting slider mechanism of a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor proposed by the utility model;

[0028] Figure 8 It is a structural schematic diagram of an existing tensioning trolley.

[0029] Figure numerals: 1. tensioning roller, 2. synchronous gear rack mechanism, 21. rack, 22. gear, 23. gear shaft, 24. flat key, 3. tensioning trolley, 4. one-way limiting slider mechanism, 41. limiting block, 42. first gear shaft bearing, 43. slider, 5. roller raceway limiting mechanism, 51. roller group, 511. connecting shaft, 512. second gear shaft bearing, 513. roller support, 514. roller shaft, 515. roller bearing, 516. roller, 52. upper raceway, 53. lower raceway. DETAILED DESCRIPTION

[0030] The utility model is described in detail below with reference to the accompanying drawings.

[0031] As attached Figure 1As shown, a synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor according to an embodiment of the utility model comprises a tensioning trolley 3 and a trolley track. The tensioning trolley 3 is slidably arranged on the trolley track. A tensioning roller 1 is arranged on the tensioning trolley 3. The tensioning trolley 3 also comprises a synchronous rack and pinion mechanism 2. The synchronous rack and pinion mechanism 2 comprises a rack 21, a gear 22 and a gear shaft 23. A rack 21 is symmetrically fixedly connected to each side of the trolley track. The lower end of the tensioning trolley 3 is slidably connected to the gear shaft 23 through a one-way limiting slider mechanism 4. The one-way limiting slider mechanism 4 is used to limit the tensioning trolley 3 to only be able to move up and down with the gear shaft 23. A gear 22 is fixedly connected to each end of the gear shaft 23. The gears 22 are respectively meshed with the racks 21 on the same side. As shown in the attached figure Figure 4 As shown, in this embodiment, the gear 22 and the rack 21 have the same module and mesh with each other. The axes of the two racks 21 are parallel to the axis of the belt conveyor, and the positions of the corresponding spur teeth on the left and right sides are symmetrical relative to the axis of the conveyor. When in use, the axis of the gear shaft 23 is always perpendicular to the longitudinal axis of the belt conveyor. The gear shaft 23 can be rotated by a driving motor or the like as needed, thereby realizing the displacement adjustment of the tensioning trolley 3. The driving structure of the tensioning trolley 3 can also be used to realize the overall drive, and only the synchronous gear rack mechanism 2 and the one-way limit slider mechanism 4 are used as guide auxiliary corrections.

[0032] When the utility model is in use, through the setting of the synchronous gear rack mechanism 2, the connection between the tensioning trolley 3 and the gear shaft 23, and the matching setting of the rack 21 and the gear 22 at both ends of the gear shaft 23 are used to ensure that the tensioning trolley 3 can move according to the trajectory of the rack 21 when moving, thereby avoiding the belt running deviation; at the same time, through the setting of the one-way limit slider mechanism 4, the tensioning trolley 3 and the gear shaft 23 are limited to only an up and down displacement relationship. In this way, when in use, it can not only further ensure that the tensioning trolley 3 moves in the specified direction, further avoiding the belt running deviation, but also avoid the tensioning trolley from bouncing up and down under the action of external force. The gear shaft 23 and other structures of the synchronous gear rack mechanism 2 will not be damaged, the rigid impact between the structures is reduced, and the safety and service life of the device are further increased.

[0033] As attached Figure 6As shown, in another specific embodiment, the one-way limit slider mechanism 4 includes a limit block 41, a first gear shaft bearing 42 and a slider 43. At least one set of two limit blocks 41 is vertically provided at the lower end of the tensioning trolley 3. A slider 43 is rotatably connected to the gear shaft 23 through the first gear shaft bearing 42. The slider 43 is slidably arranged between the two limit blocks 41 at the lower end of the tensioning trolley 3, and the slider 43 can only move up and down along the limit block 41. In this way, when in use, the tensioning trolley 3 can be slidably connected to the slider 43 on the gear shaft 23 through the limit block 41 at the lower end, so that the tensioning trolley 3 can slide up and down under the action of the limit block 41 and the slider 43; at the same time, because the slider 43 is rotatably connected to the gear shaft 23 through the first gear shaft bearing 42, the influence of the slider 43 and other structures when the gear shaft 23 rotates is also avoided, thereby ensuring the operation of the device.

[0034] In another specific embodiment, a groove having the same width as the slider 43 is provided in the middle of the limit block 41, and the surfaces of the two limit blocks 41 having the grooves are arranged opposite to each other, and the slider 43 is slidably arranged in the grooves of the two limit blocks 41. In this way, it is further ensured that the tensioning trolley 3 can only slide up and down under the action of the limit block 41 and the slider 43.

[0035] In a specific embodiment, a group of two limit blocks 41 at the lower end of the tensioning trolley 3 is arranged in the middle of the tensioning trolley 3, and the sliding block 43 is correspondingly arranged in the middle of the gear shaft 23 through the first gear shaft bearing 42.

[0036] As attached Figure 7 As shown, in another specific embodiment, two groups of limit blocks 41 are provided at the lower end of the tensioning trolley 3, each group of limit blocks 41 consists of two blocks, and the two groups of limit blocks 41 are symmetrically arranged on both sides of the tensioning trolley 3, and two groups of first gear shaft bearings 42 and sliders 43 are arranged on the gear shaft 23 corresponding to the two groups of limit blocks 41, respectively, and the two sliders 43 are slidably arranged in the two groups of limit blocks 41. In this way, through the action of the sliders 43, the positions of the left and right sides of the tensioning trolley 3 in the longitudinal axis direction of the conveyor are completely synchronized with the gear shaft 23, and there can be a certain movable distance in the vertical direction, so as to avoid the damage of the gear shaft caused by the up and down bouncing movement of the tensioning trolley 3 under the action of external force.

[0037] As attached Figure 3 As shown, in another specific embodiment, the gear shaft 23 and the gear 22 are fixedly connected via a flat key 24 to ensure that the gears 22 on both sides rotate completely synchronously.

[0038] As attached Figure 2As shown, in another specific embodiment, a roller track limiting mechanism 5 is also included, and the roller track limiting mechanism 5 includes a roller group 51 and a strip track. The two sides of the two racks 21 that are far away from each other are respectively connected in parallel with a strip track. A connecting shaft 511 is respectively extended at both ends of the gear shaft 23, and a roller group 51 is rotatably connected to the connecting shaft 511. The roller group 51 is correspondingly slidably arranged in the strip track on the same side. In this way, when in use, the arrangement of the roller group 51 and the strip track can ensure the stability of the synchronous gear rack mechanism 2 when in use, thereby ensuring the stability of the entire device when in use.

[0039] As attached Figure 5 As shown, in a specific embodiment, the roller assembly 51 includes two triangular plate-shaped roller supports 513 and three rollers 516. The three corners of the two triangular plate-shaped roller supports 513 are respectively rotatably connected to a roller 516. The connecting shaft 511 is respectively rotatably connected to the center of the two roller supports 513 through the second gear shaft bearing 512, which can ensure that the positions of the center point of the gear shaft 23 and the three rollers 516 are relatively fixed. In this way, the setting of the triangular plate-shaped roller supports 513 and the three rollers 516 located at the three corners can further ensure stability during use. In this embodiment, the roller supports 513 can be set to an isosceles triangle shape.

[0040] Specifically, the interior of the strip-shaped raceway is set as an upper raceway 52 and a lower raceway 53, and the triangular plate-shaped roller support 513 is set with a sharp tip angle upward, and the upper ends of the two roller supports 513 are rotatably connected to a roller 516, and are connected to the upper raceway 52 through a roller 516 located at the upper end, and the lower ends of the two roller supports 513 are connected to two rollers 516, and are connected to the lower raceway 53 through two rollers 516 located at the lower end. The position of the roller group 51 in the vertical direction is limited by the strip-shaped raceway, and the roller raceway limiting mechanism 5 can ensure that the distance between the center of the gear 22 and the rack 21 remains unchanged, so as to prevent the gear 22 from jumping or the gears 22 on both sides from moving in the horizontal direction inconsistently.

[0041] Specifically, the two roller supports 513 are fixedly connected via a roller shaft 514 , and the roller 516 is rotatably disposed on the roller shaft 514 via a roller bearing 515 .

[0042] The roller raceway limiting mechanism 5 of the utility model can ensure that the gear 21 and the rack 22 are always in the correct meshing position; the two gears 21 are connected to each other by the gear shaft 23, and the rotation angles are exactly the same, and then the mutual working force of the meshing of the gears 21 is used to make the two gears 21 move the same distance along the axis of the belt conveyor. At the same time, during the operation of the belt conveyor, the tensioning trolley 3 may cause the tensioning trolley 3 to bounce due to start, stop or material impact. Through the one-way limit slider mechanism 4 set between the gear shaft 23 and the tensioning trolley 3, the moving distance of both sides of the tensioning trolley 3 along the axis of the conveyor belt is synchronized with the gear 21, but it can move freely in the direction perpendicular to the axis of the conveyor belt, avoiding the tensioning trolley 3. The bouncing movement of the tensioning trolley 3 causes the synchronous gear rack mechanism 2 and the roller raceway limiting mechanism 5 to be damaged by force. After installation, the gear 21 and the rack 22 do not need to be adjusted, and the one-way limit slider mechanism 4, the axis, etc. only need to be properly lubricated, and each component has little wear and maintenance.

[0043] When the device of the utility model is in use, the synchronous gear rack mechanism 2 and the one-way limiting slider mechanism 4 are arranged in coordination, so that the running direction of the tensioning trolley 3 is strictly limited during operation, thereby ensuring that the axis of the tensioning roller does not deflect and the conveyor belt is prevented from deviation, thereby solving the problem of conveyor belt deviation caused by the deflection of the axis of the active tensioning roller of the chain bucket ship unloader relay belt conveyor.

[0044] The utility model can limit the horizontal movement distance of the two sides of the tensioning trolley 3 through the synchronous gear rack mechanism 2, and can ensure that the tensioning trolley 3 moves along the axis of the belt conveyor. Its direction does not deflect during use. Since the tensioning roller 1 is installed on the tensioning trolley 3, the belt running deviation caused by the direction deflection when the tensioning trolley 3 moves can be avoided; the tensioning trolley 3 and the trolley track can be manufactured and installed in the original way, and sufficient margin is left, so that the tensioning trolley 3 can move smoothly and without jamming in the direction of the belt conveyor axis; the synchronous gear rack mechanism 2 does not require additional external power, works reliably and has good effect.

[0045] The utility model uses a synchronous gear rack mechanism 2 and a related limiting device to make the axis of the tensioning roller 1 of the chain bucket ship unloader relay belt conveyor always perpendicular to the longitudinal axis of the chain bucket ship unloader relay belt conveyor, thereby avoiding the conveyor belt from running off due to the axis deflection of the tensioning roller 1; the utility model has strong adaptability to actual working conditions, and when the tensioning trolley 3 is subjected to external force and produces bouncing motion, the synchronization device will not be damaged; the utility model can be directly installed on the original tensioning trolley 3 and trolley track and other structures as needed, and a limiting slider can be added to the tensioning trolley 3 as needed; there is no need to additionally set up a detection device, an automatic adjustment mechanism, etc., and the utility model has a purely mechanical structure and is easy to maintain.

[0046] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. used in the utility model are only for the convenience of description and are not used to limit the scope of implementation of the utility model. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the utility model without substantially changing the technical content.

[0047] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims

1. A synchronous rack and pinion tensioning trolley for a chain bucket ship unloader relay belt conveyor, comprising a tensioning trolley (3) and a trolley track, wherein the tensioning trolley (3) is slidably arranged on the trolley track, and a tensioning roller (1) is arranged on the tensioning trolley (3), characterized in that: The invention also comprises a synchronous rack and pinion mechanism (2), wherein the synchronous rack and pinion mechanism (2) comprises a rack (21), a gear (22) and a gear shaft (23), wherein two sides of the trolley track are respectively fixedly connected with a rack (21), and the lower end of the tensioning trolley (3) is slidably connected with the gear shaft (23) via a one-way limiting slider mechanism (4), wherein the one-way limiting slider mechanism (4) is used to limit the tensioning trolley (3) to only be able to move up and down with the gear shaft (23), and two ends of the gear shaft (23) are respectively fixedly connected with a gear (22), and the gears (22) are respectively meshed with the racks (21) on the same side.

2. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 1, characterized in that: The one-way limit slider mechanism (4) comprises a limit block (41), a first gear shaft bearing (42) and a slider (43); at least one set of two limit blocks (41) are vertically arranged at the lower end of the tensioning trolley (3); a slider (43) is rotatably connected to the gear shaft (23) via the first gear shaft bearing (42); the slider (43) is slidably arranged between the two limit blocks (41) at the lower end of the tensioning trolley (3); and the slider (43) can only move up and down along the limit blocks (41).

3. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 2, characterized in that: A groove having the same width as the sliding block (43) is provided in the middle of the limiting block (41), and the surfaces of the two limiting blocks (41) provided with the grooves are arranged opposite to each other, and the sliding block (43) is slidably arranged in the grooves of the two limiting blocks (41).

4. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 2, characterized in that: A group of two limit blocks (41) at the lower end of the tensioning trolley (3) are arranged in the middle of the tensioning trolley (3), and the sliding block (43) is correspondingly arranged in the middle of the gear shaft (23) through the first gear shaft bearing (42).

5. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 2, characterized in that: Two groups of limit blocks (41) are provided at the lower end of the tensioning trolley (3), each group of limit blocks (41) consists of two blocks, and the two groups of limit blocks (41) are symmetrically arranged on both sides of the tensioning trolley (3), and two groups of first gear shaft bearings (42) and sliders (43) are arranged on the gear shaft (23) corresponding to the two groups of limit blocks (41), and the two sliders (43) are slidably arranged in the two groups of limit blocks (41) respectively.

6. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 1, characterized in that: The gear shaft (23) and the gear (22) are fixedly connected via a flat key (24).

7. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 1, characterized in that: It also comprises a roller track limiting mechanism (5), the roller track limiting mechanism (5) comprising a roller group (51) and a strip track, the two racks (21) are each parallelly connected to a strip track on one side away from the other, a connecting shaft (511) is respectively extended from both ends of the gear shaft (23), a roller group (51) is rotatably connected to the connecting shaft (511), and the roller group (51) is correspondingly slidably arranged in the strip track on the same side.

8. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 7, characterized in that: The roller assembly (51) comprises two triangular plate-shaped roller supports (513) and three rollers (516); three corners of the two triangular plate-shaped roller supports (513) are respectively rotatably connected to a roller (516); and the connecting shaft (511) is rotatably connected to the center of the two roller supports (513) via a second gear shaft bearing (512).

9. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 8, characterized in that: The interior of the strip-shaped rolling track is configured as an upper rolling track (52) and a lower rolling track (53); the triangular plate-shaped roller support (513) is configured with a tip angle pointing upward; the upper ends of the two roller supports (513) are rotatably connected to a roller (516) and are connected to the upper rolling track (52) via a roller (516) located at the upper end; the lower ends of the two roller supports (513) are connected to two rollers (516) and are connected to the lower rolling track (53) via two rollers (516) located at the lower end.

10. The synchronous rack and pinion tensioning trolley for the chain bucket ship unloader relay belt conveyor according to claim 8, characterized in that: The two roller supports (513) are fixedly connected via a roller shaft (514), and the roller (516) is rotatably arranged on the roller shaft (514) via a roller bearing (515).

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