Roller conveyor

Abstract

The utility model provides a roller conveyor which comprises a frame body, a main conveying roller set, an auxiliary conveying roller set and a driving device, the main conveying roller set comprises a plurality of main rollers rotationally connected to the frame body, the auxiliary conveying roller set comprises a plurality of auxiliary rollers rotationally connected to the frame body, and a supporting part located between the main conveying roller set and the auxiliary conveying roller set is arranged on the frame body. The opposite ends of the main roller and the auxiliary roller are rotationally connected to the supporting part. According to the roller conveyor provided by the utility model, the main conveying roller group and the auxiliary conveying roller group are arranged on the frame body, so that the width of the conveyor is expanded, and the size of a material tray which can be borne by the conveyor is increased. Meanwhile, a supporting part structure is arranged between the main conveying roller set and the auxiliary conveying roller set. The supporting part not only can effectively support the main roller and the auxiliary roller, but also obviously reduces the flexural deflection of the main roller and the auxiliary roller when the rollers are in a stressed state, and greatly improves the bearing capacity of the roller conveyor to heavy materials.

Description

TECHNICAL FIELD

[0001] The utility model relates to logistics conveying equipment technical field especially relates to a roller conveyor. BACKGROUND

[0002] In the warehouse logistics conveying or product assembly line, conveying machine is needed to transport materials, and the structure size of the conveying machine is matched with the material pallet. When transporting materials, the pallet is placed on the logistics conveying or product assembly line, and the materials to be conveyed are placed on the material pallet, so as to realize the transportation of the materials. At present, the size of the commonly used material pallet on the market is 1200x1000mm, that is, the size in the bearing direction of the roller conveyor is 1000mm, so the size of the roller conveyor on the market mostly fluctuates around this value. With the development and progress of China's industry, the material conveying in fields such as military industry, shipbuilding and chemical industry puts forward higher requirements for conveying pallets and roller conveyors. The above industries require pallets with a width of 2000-3000mm, which is a super large size. The traditional size of the roller conveyor cannot meet the conveying requirements of the above industries, and a new type of roller conveyor needs to be designed to meet the material transportation function. SUMMARY

[0003] The utility model provides a kind of roller conveyor to solve the defect that large size and large weight material cannot be conveyed in prior art.

[0004] According to the roller conveyor provided by the utility model, the main conveying roller group includes a plurality of main roller cylinders rotatably connected to the frame body, the auxiliary conveying roller group includes a plurality of auxiliary roller cylinders rotatably connected to the frame body, the frame body is provided with a support portion located between the main conveying roller group and the auxiliary conveying roller group, the main roller cylinder and the auxiliary roller cylinder are rotatably connected to the support portion at one end facing each other, the rotation axes of the main roller cylinder and the auxiliary roller cylinder are parallel to each other, the driving device is connected to the frame body for driving the main roller cylinder and the auxiliary roller cylinder to rotate synchronously, and the rotation directions of the main roller cylinder and the auxiliary roller cylinder are the same.

[0005] According to the roller conveyor provided by the utility model, torque is transmitted between adjacent two main roller cylinders and adjacent two auxiliary roller cylinders through chain transmission, the driving device includes a transmission shaft rotatably connected to the frame body and a motor for driving the transmission shaft to rotate, the transmission shaft is fixedly connected with a first sprocket and a second sprocket, the end portion of any main roller cylinder is fixedly connected with a main transmission sprocket, the end portion of any auxiliary roller cylinder is fixedly connected with an auxiliary transmission sprocket, a transmission chain is sleeved between the first sprocket and the main transmission sprocket and between the second sprocket and the auxiliary transmission sprocket respectively, and the motor drives the transmission shaft to rotate through chain transmission.

[0006] The utility model provides a kind of roller conveyor, support seat and first bolt are connected on the frame body, the motor is installed in the support seat, first long hole is provided on the support seat, the first long hole is extended along the direction of approaching or away from the transmission shaft, the first bolt is connected with the frame body by thread in one end of the first long hole.

[0007] According to the roller conveyor provided by the utility model, the second bolt is threadedly connected to the frame body, the end of the second bolt is in contact with the support seat and applies a pushing force to the support seat away from the transmission shaft.

[0008] According to the roller conveyor provided by the utility model, a first nut is connected to the second bolt, and the first nut is tightly rotated on the frame body to provide a pre-tightening force for the connection between the second bolt and the frame body.

[0009] According to the roller conveyor provided by the utility model, a tensioning block and a third bolt are connected to the frame body, the side wall of the tensioning block is in contact with the transmission chain, a second long hole is provided on the tensioning block, the second long hole is extended along the direction of approaching or away from the transmission chain, and the end of the third bolt is threadedly connected to the frame body through the second long hole.

[0010] According to the roller conveyor provided by the utility model, a fourth bolt is threadedly connected to the frame body, the end of the fourth bolt is in contact with the tensioning block and applies a pushing force to the tensioning block towards the transmission chain.

[0011] According to the roller conveyor provided by the utility model, a second nut is connected to the fourth bolt, and the second nut is tightly rotated on the frame body to provide a pre-tightening force for the connection between the fourth bolt and the frame body.

[0012] According to the roller conveyor provided by the utility model, a pushing block is fixedly connected to the tensioning block close to the upper side, the pushing block is provided with an arc-shaped tensioning side edge on the side close to the transmission chain, and the tensioning block is in contact with the transmission chain.

[0013] According to the roller conveyor provided by the utility model, a plurality of support legs are arranged at the bottom of the frame body, and a support beam is fixedly connected between adjacent two support legs.

[0014] The utility model provides a kind of roller conveyor, by being provided with main conveying roller group and vice conveying roller group on frame body, the extension of conveyor width is realized, so that the size of material pallet that conveyor can carry increases.Simultaneously, support part structure is arranged between main conveying roller group and vice conveying roller group.The support part not only can effectively support main roller and vice roller, but also significantly reduces the deflection deformation of main roller and vice roller under stress state, and further greatly improves the carrying capacity of heavy material of roller conveyor. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be simply introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor according to these drawings.

[0016] Figure 1 It is a kind of structure schematic diagram of roller conveyor provided by the utility model.

[0017] Figure 2 It is a kind of position relation schematic diagram of roller conveyor frame body and motor provided by the utility model.

[0018] Figure 3 It is a kind of transmission relationship schematic diagram when motor drives single main roller to rotate of roller conveyor provided by the utility model.

[0019] Figure 4 It is a kind of transmission relationship schematic diagram when motor drives two main rollers to rotate of roller conveyor provided by the utility model.

[0020] Figure 5 It is a kind of connection relationship schematic diagram of roller conveyor tensioning block provided by the utility model.

[0021] Figure 6 It is Figure 2 Enlarged schematic view of A in

[0022] Figure 7 It is a kind of connection relationship schematic diagram of roller conveyor driving device provided by the utility model.

[0023] Reference signs:

[0024] 1. Frame; 11. C-beam; 12. Support leg; 13. Support beam; 14. Adjustable support foot; 2. Main roller; 21. Main drive sprocket; 3. Auxiliary roller; 31. Auxiliary drive sprocket; 4. Drive unit; 41. Drive shaft; 411. First sprocket; 412. Second sprocket; 413. Third sprocket; 42. Motor; 41. Drive sprocket; 5. Support part; 51. Rectangular steel; 52. U-shaped bend plate; 6. Drive chain; 7. Support seat; 71. First bolt; 72. First elongated hole; 73. Second bolt; 74. First nut; 8. Tensioning block; 81. Third bolt; 82. Second elongated hole; 83. Fourth bolt; 84. Second nut; 85. Push block; 851. Tensioning side. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] The following is combined Figures 1-7 This invention describes a roller conveyor.

[0029] This utility model provides a roller conveyor, including a frame, a main conveyor roller group, an auxiliary conveyor roller group, and a drive device. The main conveyor roller group includes multiple main rollers rotatably connected to the frame, and the auxiliary conveyor roller group includes multiple auxiliary rollers rotatably connected to the frame. A support portion is provided on the frame between the main conveyor roller group and the auxiliary conveyor roller group. The main rollers and auxiliary rollers are rotatably connected to the support portion at opposite ends, and the rotation axes of the main rollers and auxiliary rollers are parallel to each other. The drive device is connected to the frame to drive the main rollers and auxiliary rollers to rotate synchronously in the same direction.

[0030] The following is combined with Figures 1-7 This invention describes a roller conveyor.

[0031] This utility model provides a roller conveyor, including a frame 1, a main conveyor roller group, an auxiliary conveyor roller group, and a drive device 4. The main conveyor roller group includes multiple main rollers 2 rotatably connected to the frame 1, and the auxiliary conveyor roller group includes multiple auxiliary rollers 3 rotatably connected to the frame 1. A support part 5 is provided on the frame 1 between the main conveyor roller group and the auxiliary conveyor roller group. The main rollers 2 and auxiliary rollers 3 are rotatably connected to the support part 5 at opposite ends. The rotation axes of the main rollers 2 and auxiliary rollers 3 are parallel to each other. The drive device 4 is connected to the frame 1 to drive the main rollers 2 and auxiliary rollers 3 to rotate synchronously. The rotation directions of the main rollers 2 and auxiliary rollers 3 are the same.

[0032] Specifically, such as Figure 1 , Figure 2 As shown, the frame 1 is equipped with a main conveyor roller group, an auxiliary conveyor roller group, and a support part 5 located between the main conveyor roller group and the auxiliary conveyor roller group. The main conveyor roller group consists of multiple main rollers 2 of the same size, and the auxiliary conveyor roller group consists of multiple auxiliary rollers 3 of the same size. C-shaped beams 11C are provided on both sides of the frame 1 as support structures. The support part 5 is made of rectangular steel 51 welded with U-shaped bent plates 52U. The U-shaped bent plates 52U have through holes on both sides corresponding to the C-shaped beams 11C for connecting the main rollers 2 and the auxiliary rollers 3. The main rollers 2 are rotatably connected between the left C-shaped beam 11C and the support part 5, and the auxiliary rollers 3 are rotatably connected between the right C-shaped beam 11C and the support part 5. The rotation axes of the main rollers 2 and the auxiliary rollers 3 are parallel to each other, and the tops of the main rollers 2 and the auxiliary rollers 3 are located on the same horizontal plane. The drive device 4 drives all the main rollers 2 and the auxiliary rollers 3 to rotate synchronously in the same direction and at the same speed.

[0033] When using a roller conveyor, the main roller 2 and the auxiliary roller 3 rotate synchronously. When conveying materials on standard-sized pallets, the materials and pallets can be conveyed separately on the main and auxiliary conveyor roller sets. However, when conveying large-sized pallets, if the main or auxiliary conveyor roller set cannot convey the pallet independently, the pallet can be placed across the support 5, allowing the main and auxiliary conveyor roller sets to simultaneously support and convey the large-sized pallet.

[0034] This utility model provides a roller conveyor. By setting a main conveyor roller group and an auxiliary conveyor roller group on the frame 1, the width of the conveyor is expanded, thereby increasing the size of the material pallets that the conveyor can carry. Simultaneously, a support structure 5 is provided between the main conveyor roller group and the auxiliary conveyor roller group. This support structure 5 not only effectively supports the main roller 2 and the auxiliary roller 3, but also significantly reduces the deflection (i.e., deflection) of the main roller 2 and the auxiliary roller 3 under stress, thereby greatly improving the roller conveyor's load-bearing capacity for heavy materials.

[0035] Furthermore, torque is transmitted between two adjacent main rollers 2 and between two adjacent auxiliary rollers 3 via chain transmission. The drive device 4 includes a drive shaft 41 rotatably connected to the frame 1 and a motor 42 that drives the drive shaft 41 to rotate. A first sprocket 411 and a second sprocket 412 are fixedly connected to the drive shaft 41. A main drive sprocket 21 is fixedly connected to the end of any main roller 2, and an auxiliary drive sprocket 31 is fixedly connected to the end of any auxiliary roller 3. Transmission chains 6 are respectively sleeved between the first sprocket 411 and the main drive sprocket 21, and between the second sprocket 412 and the auxiliary drive sprocket 31.

[0036] Specifically, such as Figure 1 , Figure 7 As shown, the outer sides of the main roller 2 and the auxiliary roller 3 are configured with a double sprocket structure. Adjacent main rollers 2 and adjacent auxiliary rollers 3 transmit torque through chain drive. The drive device 4 is mounted on the support part 5. The drive device 4 includes a drive shaft 41 and a motor 42. The rotating shaft of the motor 42 and the drive shaft 41 are driven to rotate through a sprocket and chain drive. The drive shaft 41 transmits torque to any one of the main rollers 2 and the driven roller through chain drive.

[0037] In one embodiment, such as Figure 3 , Figure 7As shown, the motor 42 rotation axis is fixedly connected with a driving sprocket 41, the transmission shaft 41 is sequentially provided with a third sprocket 413, a first sprocket 411 and a second sprocket 412 along the axial direction, the driving sprocket 41 and the third sprocket 413 are connected through the chain transmission to realize the rotation of the motor 42 driving the transmission shaft 41. One of the main roller cylinders 2 in the middle of the main conveying roller group is fixedly connected with a main transmission sprocket 21 at one end close to the support part 5, and one of the auxiliary roller cylinders 3 in the middle of the auxiliary conveying roller group is fixedly connected with an auxiliary transmission sprocket 31 at one end close to the support part 5. The first sprocket 411 and the main transmission sprocket 21 are respectively sleeved with a transmission chain 6, and the second sprocket 412 and the auxiliary transmission sprocket 31 are respectively sleeved with a transmission chain 6. The connection modes of the two are the same. When the motor 42 drives the transmission shaft 41 to rotate, the first sprocket 411 and the main transmission sprocket 21 are driven to rotate through the chain transmission, thereby driving the one main roller cylinder 2 in the middle of the main conveying roller group to rotate, and the second sprocket 412 and the auxiliary transmission sprocket 31 are driven to rotate through the chain transmission, thereby driving the one auxiliary roller cylinder 3 in the middle of the auxiliary conveying roller group to rotate. Since the torque is transmitted between the adjacent two main roller cylinders 2 and the adjacent two auxiliary roller cylinders 3 through the chain transmission, all the main roller cylinders 2 and the auxiliary roller cylinders 3 are driven to rotate.

[0038] In an optional embodiment, as shown in Figure 4 、 Figure 7 , two adjacent main roller cylinders 2 in the middle of the main conveying roller group are respectively fixedly connected with a main transmission sprocket 21 at one end close to the support part 5, and two adjacent auxiliary roller cylinders 3 in the middle of the auxiliary conveying roller group are respectively fixedly connected with an auxiliary transmission sprocket 31 at one end close to the support part 5. The first sprocket 411 and the two main transmission sprockets 21 are respectively sleeved with a transmission chain 6, and the second sprocket 412 and the two auxiliary transmission sprockets 31 are respectively sleeved with a transmission chain 6. When the motor 42 drives the transmission shaft 41 to rotate, the first sprocket 411 and the main transmission sprocket 21 are driven to rotate through the chain transmission, thereby driving the two main roller cylinders 2 in the middle of the main conveying roller group to rotate, and the second sprocket 412 and the auxiliary transmission sprocket 31 are driven to rotate through the chain transmission, thereby driving the two auxiliary roller cylinders 3 in the middle of the auxiliary conveying roller group to rotate. The inwardly bendable tension range of the transmission chain 6 is increased.

[0039] Further, the frame body 1 is connected with a support seat 7 and a first bolt 71, and the motor 42 is installed on the support seat 7. The support seat 7 is provided with a first long hole 72, the first long hole 72 extends along the direction close to or away from the transmission shaft 41, and the first bolt 71 is threadedly connected with the frame body 1 at one end through the first long hole 72.

[0040] Specifically, as shown in Figure 2 、 Figure 6As shown, the support seat 7 is connected to the frame 1, and four first long holes 72 parallel to each other are arranged on the support seat 7. The number of the first long holes 72 can be adjusted according to actual needs. The first long holes 72 extend along the direction of approaching or moving away from the transmission shaft 41. When the support seat 7 is connected to the support frame, the first bolt 71 is passed through the first long hole 72, and the support seat 7 is slid along the extension direction of the first long hole 72 to adjust the distance between the motor 42 and the transmission shaft 41, so as to adjust the tension of the chain between the motor 42 and the transmission shaft 41. After the adjustment is completed, the first bolt 71 is tightened, and the head of the first bolt 71 presses the support seat 7 against the frame 1 to fix the position of the motor 42.

[0041] Further, the second bolt 73 is threadedly connected to the frame 1, and the end of the second bolt 73 contacts the support seat 7 and applies a pushing force to the support seat 7 in the direction moving away from the transmission shaft 41.

[0042] Specifically, as shown in the figure, Figure 6 the second bolt 73 is threadedly connected to the frame 1, and the second bolt 73 is located on the side of the support seat 7 close to the transmission shaft 41. The end of the second bolt 73 tightly presses the support seat 7, thereby limiting the sliding of the support seat 7 towards the transmission shaft 41, thereby improving the stability of the tension of the chain between the motor 42 and the transmission shaft 41. At the same time, by rotating the second bolt 73 to push the support seat 7 away from the transmission shaft 41, the tension of the chain between the motor 42 and the transmission shaft 41 is fine-tuned.

[0043] Further, the first nut 74 is connected to the second bolt 73, and the first nut 74 is rotated and pressed against the frame 1 to provide a pre-tightening force for the connection between the second bolt 73 and the frame 1. After the adjustment of the tension of the chain between the motor 42 and the transmission shaft 41 is completed, the first nut 74 is tightened to provide a pre-tightening force for the connection between the second bolt 73 and the frame 1, thereby improving the stability of the connection between the second bolt 73 and the frame 1.

[0044] Further, as shown in the figure, Figure 5 the tension block 8 and the third bolt 81 are connected to the frame 1. The side wall of the tension block 8 contacts the transmission chain, and the second long hole 82 is arranged on the tension block 8 and extends along the direction of approaching or moving away from the transmission chain 6. The end of the third bolt 81 is threadedly connected to the frame 1 through the second long hole 82.

[0045] Specifically, as shown in the figure, Figure 5As shown, the tensioning blocks 8 are provided in two, respectively arranged on both sides of the transmission chain 6. Two second long holes 82 parallel to each other are arranged on the tensioning block 8, and the number of the second long holes 82 can be adjusted according to actual needs. The third bolt 81 is screwed with the frame body 1 after passing through the second long hole 82, and the second long hole 82 is extended along the direction close to or away from the transmission chain 6, so that the tensioning block 8 can slide along the second long hole 82. When adjusting the tensioning force of the transmission chain 6, the two tensioning blocks 8 are driven to move towards each other along the second long hole 82, and the transmission chain 6 is tensioned from the outside to the inside, so as to adjust the tensioning force of the transmission chain 6. After completing the adjustment of the tensioning force of the transmission chain 6, the third bolt 81 is tightened, and the head of the third bolt 81 presses the tensioning block 8 on the frame body 1, thereby improving the stability of the tensioning block.

[0046] Further, the fourth bolt 83 is screwed on the frame body 1, and the end of the fourth bolt is in contact with the tensioning block 8 and applies a pushing force to the tensioning block 8 in the direction close to the transmission chain 6. The contact between the end of the fourth bolt and the tensioning block 8 limits the tensioning block 8 from moving away from the transmission chain 6, thereby improving the stability of the tensioning force adjustment of the transmission chain 6.

[0047] Further, the second nut 84 is connected to the fourth bolt, and the second nut 84 is pressed on the frame body 1 to provide a pre-tightening force for the connection between the fourth bolt and the frame body 1. After adjusting the tensioning force of the transmission chain 6, the second nut 84 is tightened to provide a pre-tightening force for the connection between the fourth bolt and the frame body 1, thereby improving the stability of the connection between the fourth bolt and the frame body 1.

[0048] Further, the tensioning block 8 is connected to the push block 85 close to the upper fixed connection, and the push block 85 is provided with an arc-shaped tensioning side edge 851 close to the side of the transmission chain 6, and the tensioning block 8 is in contact with the transmission chain 6. When the push block 85 tensions the transmission chain 6, the arc-shaped tensioning side edge 851 is in contact with the outside of the transmission chain 6, and the transmission chain 6 slides on the tensioning side edge 851, and the arc-shaped structure reduces the friction between the transmission chain 6 and the tensioning side edge 851. In an optional embodiment, a plurality of rollers can be rotatably connected to the tensioning side edge 851, and the rotation axis of the rollers is parallel to the rotation axis of the transmission shaft 41, and the side wall of the roller is in contact with the transmission chain 6, thereby further reducing the friction between the transmission chain 6 and the tensioning side edge 851.

[0049] Further, a plurality of support legs 12 are provided at the bottom of the frame body 1, and a support beam 13 is fixedly connected between adjacent two support legs 12. By providing the support beam 13, the stability of the structure is strengthened. An adjustment leg 14 is connected to the bottom of each support leg 12, which is used for adjusting the height of the equipment.

[0050] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A roller conveyor, characterized in that, The utility model provides a kind of main and auxiliary conveying roller group, including frame body, main conveying roller group, auxiliary conveying roller group and driving device, the main conveying roller group includes multiple main roller cylinders rotationally connected to the frame body, the auxiliary conveying roller group includes multiple auxiliary roller cylinders rotationally connected to the frame body, support portion is provided on the frame body between the main conveying roller group and auxiliary conveying roller group, the main roller cylinder is rotationally connected to the support portion with the auxiliary roller cylinder opposite end, the rotation axis of the main roller cylinder and the auxiliary roller cylinder is parallel to each other, the driving device is connected on the frame body for driving the main roller cylinder and the auxiliary roller cylinder synchronous rotation, the rotation direction of the main roller cylinder and the auxiliary roller cylinder is identical.

2. The roller conveyor of claim 1, wherein, Torque is transmitted between adjacent two main roller cylinders and adjacent two auxiliary roller cylinders by chain drive, the driving device includes a transmission shaft rotationally connected to the frame body and a motor driving the transmission shaft to rotate, the transmission shaft is fixedly connected with a first sprocket and a second sprocket, the end of any main roller cylinder is fixedly connected with a main transmission sprocket, the end of any auxiliary roller cylinder is fixedly connected with an auxiliary transmission sprocket, a transmission chain is sleeved between the first sprocket and the main transmission sprocket and between the second sprocket and the auxiliary transmission sprocket respectively, the motor drives the transmission shaft to rotate through chain drive.

3. The roller conveyor of claim 2, wherein, The frame body is connected with a support seat and a first bolt, the motor is installed on the support seat, the support seat is provided with a first long hole, the first long hole extends along the direction close to or away from the transmission shaft, and the first bolt is threadedly connected with the frame body through one end of the first long hole.

4. The roller conveyor of claim 3, wherein, The frame body is threadedly connected with a second bolt, the end of the second bolt is in contact with the support seat and applies a pushing force away from the transmission shaft to the support seat.

5. The roller conveyor of claim 4, wherein, The second bolt is connected with a first nut, and the first nut is tightly rotated on the frame body to provide a pre-tightening force for the connection between the second bolt and the frame body.

6. The roller conveyor of claim 2, wherein, The frame body is connected with a tensioning block and a third bolt, the side wall of the tensioning block is in contact with the transmission chain, the tensioning block is provided with a second long hole, the second long hole extends along the direction close to or away from the transmission chain, and the end of the third bolt is threadedly connected with the frame body through the second long hole.

7. The roller conveyor of claim 6, wherein, The frame body is threadedly connected with a fourth bolt, the end of the fourth bolt is in contact with the tensioning block and applies a pushing force close to the transmission chain to the tensioning block.

8. The roller conveyor of claim 7, wherein, The fourth bolt is connected with a second nut, and the second nut is tightly rotated on the frame body to provide a pre-tightening force for the connection between the fourth bolt and the frame body.

9. A roller conveyor according to any one of claims 6-8, characterised in that, The tensioning block is fixedly connected with a pushing block close to the top, the pushing block is provided with an arc-shaped tensioning side close to the transmission chain, and the tensioning block is in contact with the transmission chain.

10. A roller conveyor according to any one of claims 1-8, characterized in that The bottom of the frame body is provided with a plurality of support legs, and a support beam is fixedly connected between adjacent two support legs.

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