Roller conveyor and workpiece conveyor line

Abstract

The present application belongs to the field of conveying roller, and discloses a roller conveying device and a workpiece conveying line. The roller conveying device comprises a first roller conveying unit, a second roller conveying unit, a roller width adjusting mechanism and a shared driving mechanism. The first roller conveying unit and the second roller conveying unit are arranged side by side. The unit length direction of the first roller conveying unit and the second roller conveying unit is the roller conveying direction, and the unit width direction is the side-by-side direction of the conveying units. The roller width adjusting mechanism is used for adjusting the side-by-side gap width between the first roller conveying unit and the second roller conveying unit. The shared driving mechanism is used for synchronously driving the first roller conveying unit and the second roller conveying unit. The roller conveying device of the present application is beneficial to adjusting the width of the roller conveying path to avoid the protruding part of the workpiece, so as to meet the conveying requirements of different workpieces, improve the stability of the conveying process, reduce the knocking between the workpiece and the roller and achieve other purposes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveying roller, in particular to a roller conveying device and a workpiece conveying line. BACKGROUND

[0002] At present, the production line of the structure of the boom adopts the roller conveying boom workpiece, because the surface of part of the boom workpiece has protruding flanges, which causes the workpiece to be unable to be horizontally conveyed by being attached to the plane of the roller, and can only be conveyed by being tilted, but this will cause the workpiece to shake, which brings safety hazards to the production line, in addition, the protruding flanges will directly impact the roller, which will cause the risk of damage to the roller. SUMMARY

[0003] In view of at least one of the above defects or deficiencies of the prior art, the present application provides a roller conveying device and a workpiece conveying line, which is beneficial to adjust the width of the roller conveying path to avoid the protruding part of the workpiece, meet the conveying requirements of different workpieces, improve the stability of the conveying process, and reduce the knocking between the workpiece and the roller.

[0004] To achieve the above-mentioned purpose, the first aspect of the present application provides a roller conveying device, which comprises:

[0005] The first roller conveying unit and the second roller conveying unit are arranged side by side, the unit length direction of the first roller conveying unit and the second roller conveying unit is the roller conveying direction, and the unit width direction is the side-by-side direction of the conveying unit;

[0006] A roller width adjusting mechanism is used to adjust the side-by-side gap width between the first roller conveying unit and the second roller conveying unit; and

[0007] A common driving mechanism is used to synchronously drive the first roller conveying unit and the second roller conveying unit.

[0008] Optionally, the first roller conveying unit and the second roller conveying unit each comprise:

[0009] A rack is provided with a plurality of rollers arranged in sequence and spaced apart along the unit length direction on the surface of the rack, the rollers extend along the unit width direction, and a plurality of the rollers form a roller conveying plane;

[0010] The roller width adjusting mechanism and the common driving mechanism are installed below the surface of the rack.

[0011] Optionally, the surface of the rack is provided with a supporting bracket serving as an end support of the roller, the supporting bracket extends along the unit length direction in the form of a long strip;

[0012] The height of the supporting bracket is lower than the roller conveying plane.

[0013] Optionally, the inner end of the roller is pivotally mounted to the support bracket, and the outer end of the roller is sleeved with a roller-to-roller power transmission gear, and each roller-to-roller power transmission gear is integrally meshed and drivingly connected through a transmission chain.

[0014] The outer end of the roller at the first end along the unit length direction is further sleeved with a roller driving gear.

[0015] Optionally, the common driving mechanism comprises:

[0016] a roller driving mechanism for driving a driving shaft extending along the unit width direction to rotate, the driving shaft being provided with a plurality of driving gears axially spaced apart;

[0017] an intermediate transmission gear set comprising a transmission gear drivingly connected to the roller and a plurality of driven gears coaxially arranged with the transmission gear and axially spaced apart;

[0018] Wherein, under the action of the roller width adjusting mechanism, a plurality of said side-by-side gap widths can be formed between the first roller conveying unit and the second roller conveying unit, and under any said side-by-side gap width, one of the plurality of driving gears and one of the plurality of driven gears form meshing transmission.

[0019] Optionally, in the first roller conveying unit or the second roller conveying unit, the driving gears comprise narrow-distance driving gears and wide-distance driving gears, and the driven gears comprise narrow-distance driven gears and wide-distance driven gears.

[0020] And, the side-by-side gap widths comprise a first side-by-side gap width and a second side-by-side gap width, under the first side-by-side gap width, the narrow-distance driving gears and the narrow-distance driven gears are in meshing transmission, and under the second side-by-side gap width, the wide-distance driving gears and the wide-distance driven gears are in meshing transmission.

[0021] Optionally, the roller width adjusting mechanism comprises:

[0022] a reverse screw extending along the unit width direction, two ends of the reverse screw being respectively connected to the ends of the first roller conveying unit and the second roller conveying unit that are close to each other.

[0023] a roller width adjusting motor for driving the reverse screw to rotate forward or reverse to adjust the side-by-side gap width.

[0024] Optionally, the roller width adjusting mechanism is a medium driving cylinder, two ends of the medium driving cylinder being respectively mounted on the ends of the first roller conveying unit and the second roller conveying unit that are close to each other.

[0025] The second aspect of the present application provides a workpiece conveying line, comprising the roller conveying device described above, a plurality of sections of the roller conveying device are arranged in sequence along the unit length direction; and

[0026] a plurality of plate chain conveying belts extending along the unit width direction and arranged in sequence along the unit length direction, the plate chain conveying belts being inserted between the roller conveying devices of adjacent sections.

[0027] Optionally, the plate chain height of the plate chain conveying belt is adjustable, and the workpiece conveying line comprises a controller configured to:

[0028] control the plate chain conveying belt to be at a first plate chain height during the plate chain conveying belt receiving or conveying workpieces;

[0029] control the plate chain conveying belt to be lowered to a second plate chain height when the plate chain conveying belt conveys workpieces directly above the roller conveying device, so that the conveyed workpieces are lowered onto the roller conveying device;

[0030] wherein the first plate chain height is greater than the roller conveying plane of the roller conveying device, and the second plate chain height is less than the roller conveying plane.

[0031] Optionally, the controller is further configured to:

[0032] identify the type information of the workpieces to be conveyed and determine that the surface of the workpieces has a protruding part;

[0033] control the roller width adjustment mechanism to adjust the side-by-side gap width between the first roller conveying unit and the second roller conveying unit to a set width;

[0034] control the plate chain conveying belt to receive and convey workpieces onto the roller conveying device, so that the protruding part on the workpieces falls into the side-by-side gap width.

[0035] Through the above technical solution, the two roller conveying units in the roller conveying device are arranged in a side-by-side manner. Under the adjustment of the roller width adjustment mechanism, the first roller conveying unit and the second roller conveying unit can be respectively moved horizontally to adjust the gap width therebetween, so that the two rows of rollers avoid the flanges of the boom workpiece from the centerline position, which is suitable for the conveying and transportation of boom workpieces with protruding parts on the surface, effectively avoids damage to the rollers caused by the protruding flanges, and ensures the stability of the conveying. By driving the first roller conveying unit and the second roller conveying unit through the shared driving mechanism, the rolling speeds of the first roller conveying unit and the second roller conveying unit can be consistent, effectively avoiding the boom workpiece from tilting due to uneven stress on the left and right sides, so that the boom workpiece can be conveyed smoothly.

[0036] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This is a schematic diagram illustrating the receiving of different workpieces using a workpiece conveyor line according to a specific embodiment of the present invention;

[0039] Figure 2 for Figure 1 A schematic diagram of a plate chain conveyor belt at the second plate chain height in a workpiece conveyor line.

[0040] Figure 3 for Figure 1 A schematic diagram of a plate chain conveyor belt at the first plate chain height in a workpiece conveyor line;

[0041] Figure 4 This is a schematic diagram of a roller conveyor device in a specific embodiment of the present invention when it is in the first parallel gap width;

[0042] Figure 5 for Figure 4 A schematic diagram of a roller conveyor when the rollers are in the second parallel gap width.

[0043] Figure 6 for Figure 1 A schematic diagram of a single-section roller conveyor in a workpiece conveying line.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Plate chain conveyor belt; 2. Plate chain drive motor

[0046] 3. Plate chain lifting cylinder; 4. Crane boom workpiece.

[0047] 5. Frame; 6. Roller drive mechanism

[0048] 7 Drive shaft 8 Narrow-pitch drive gear

[0049] 9 Narrow-pitch driven gear; 10 Wide-pitch driving gear

[0050] 11 Wide-distance driven gear 12 Low-position alarm light

[0051] 13 Weighing controller 14 Material level display screen

[0052] 15 Power transmission gear between drums 16 Drums

[0053] 17 support bracket 18 roller width adjustment motor

[0054] 19 belt 20 reverse screw

[0055] 21 transmission chain DETAILED DESCRIPTION

[0056] The specific embodiments of the present application will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory and are not intended to limit the present application.

[0057] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0058] In the embodiments of the present application, the orientation words such as "upper", "lower", "top", "bottom" are generally used to describe the positional relationship between the components with respect to the direction shown in the drawings or the vertical, perpendicular or gravity direction, unless otherwise specified.

[0059] The present application will be described in detail below with reference to the drawings and in conjunction with exemplary embodiments.

[0060] As shown in Figure 4 and Figure 5 , the first exemplary embodiment of the present application provides a roller conveying device suitable for conveying structural parts of engineering machinery in a production line.

[0061] As shown in Figure 1 , the workpiece 4 is a boom, and the surface of the boom is flat. For a workpiece with a flat surface, the flat surface can directly make it fit the plane of the roller, so that the workpiece can be directly placed on the roller conveying path for conveying. However, for a workpiece with a flange protruding from the surface at the centerline position, when the workpiece is placed on the roller conveying path, the roller 16 needs to avoid the protruding flange, so that the workpiece can be stably placed on the roller 16 for conveying.

[0062] Therefore, in order to more intuitively explain the concept of the present application, the working principle of the roller conveying device will be described in detail below by taking how the roller conveying device assists the boom workpiece 4 in the production line of the boom workpiece 4 as an example. However, it should be noted that the application range of the roller conveying device of the present exemplary embodiment is not limited to the production line of the boom workpiece 4 described above, but can also be the production line of other engineering machinery with similar structural parts.

[0063] Specifically, the roller conveying device mainly comprises: a first roller conveying unit, a second roller conveying unit, a roller width adjusting mechanism, and a shared driving mechanism. The first roller conveying unit and the second roller conveying unit are arranged side by side, the unit length direction of the first roller conveying unit and the second roller conveying unit is the roller conveying direction, and the unit width direction is the side-by-side direction of the conveying units. Therefore, the first roller conveying unit and the second roller conveying unit can form a complete roller conveying path after being arranged side by side, and a gap can be left between the two roller conveying units. The roller width adjusting mechanism is used to adjust the side-by-side gap width between the first roller conveying unit and the second roller conveying unit, so that the side-by-side gap width can be adjusted to the width of the flange protruding from the boom workpiece 4. The shared driving mechanism can be used to synchronously drive the first roller conveying unit and the second roller conveying unit, that is, when conveying, the first roller conveying unit and the second roller conveying unit can roll and push the workpiece at the same speed, so that the stress on both sides of the boom workpiece 4 is balanced, so that the whole can move at a constant speed.

[0064] Through the above arrangement, the two roller conveying units in the roller conveying device are arranged side by side. Under the adjustment of the roller width adjusting mechanism, the first roller conveying unit and the second roller conveying unit can be moved horizontally to adjust the gap width between them, so that the two rows of rollers avoid the middle flange of the boom workpiece from the middle line position, which is suitable for the conveying and transportation of the boom workpiece 4 with a protruding part on the surface, effectively avoiding the impact and damage of the protruding flange on the roller conveying unit, and ensuring the stability of the conveying process. By driving the first roller conveying unit and the second roller conveying unit through the shared driving mechanism, the rolling speed of the first roller conveying unit and the second roller conveying unit can be consistent, effectively avoiding the boom workpiece from tilting due to uneven stress on the left and right sides, so that the boom workpiece can be smoothly conveyed.

[0065] In one embodiment, referring to Figure 4 and Figure 1 , the first roller conveying unit and the second roller conveying unit each comprise a rack 5, which is the housing of the first roller conveying unit and the second roller conveying unit. The middle part of the housing can form an inner cavity for installing various mechanisms. The surface of the rack 5 is provided with a plurality of rollers 16 arranged in the unit length direction. The roller width adjusting mechanism and the shared driving mechanism are installed below the surface of the rack, that is, in the aforementioned inner cavity. The rollers 16 extend in the unit width direction, and a roller conveying plane is formed in the extension direction, that is, the conveying surface formed by the highest point of each roller 16. Through the conveying plane, the boom workpiece 4 can be carried and rolled and pushed. In this way, the boom workpiece 4 can be conveyed in a plane, rather than an inclined plane, so that tilting of the boom workpiece 4 can be avoided to prevent shaking, and the stability of the conveying process can be ensured.

[0066] In one embodiment, referring toFigure 4 The rack surface is provided with a support bracket 17 for supporting the end of the roller 16. The roller 16 can be stably installed on the rack 5 by the support bracket 17. In order to enable the roller 16 to rotate when in operation, the roller 16 is rotatably connected to the support bracket 17 by a bearing. The support bracket 17 is long and extends along the unit length direction. The height of the support bracket 17 is lower than the roller conveying plane, so that the boom workpiece 4 can directly land on the roller 16 when it is lowered, instead of the support bracket 17.

[0067] In an embodiment, the inner end of the roller 16 is pivotally installed on the support bracket 17. For example, the inner end of the roller 16 can be provided with a bearing fixedly installed on the support bracket 17, so that the roller 16 is rotatably connected to the support bracket 17. The outer end of the roller 16 is sleeved with the inter-roller power transmission gear 15. It should be noted that the inner end of the roller 16 is the side close to the side-by-side gap, and the outer end is the side away from the side-by-side gap. For reference Figure 6 The inter-roller power transmission gear 15 of each roller 16 is integrally meshingly connected by the transmission chain 21. The outer end of the roller 16 at the first end along the unit length direction is also sleeved with a roller driving gear 14. The common driving mechanism can drive the roller 16 to roll by the roller driving gear 14. When the roller 16 rolls, the inter-roller power transmission gear 15 can drive the transmission chain 21 to rotate, and the rotation of the transmission chain 21 can drive the inter-roller power transmission gear 15 of other rollers 16 to rotate, so that the other rollers 16 can roll synchronously with the roller 16. It can be seen that only one roller 16 needs to be set as the driving roller, so that all the rollers 16 of the roller conveying unit can roll synchronously, thereby saving the construction cost of the device;

[0068] In an embodiment, for reference Figure 4 The common driving mechanism includes a roller driving mechanism 6 and an intermediate transmission gear set. The roller driving mechanism 6 can drive the driving shaft 7 extending along the unit width direction to rotate. The driving shaft 7 is provided with a plurality of driving gears axially spaced. When the driving shaft 7 rotates, the plurality of driving gears can rotate synchronously. The intermediate transmission gear set includes a transmission gear 12 in transmission connection with the roller 16 and a plurality of driven gears coaxially arranged with the transmission gear 12 and axially spaced.

[0069] Further, under the action of the roller width adjusting mechanism, a plurality of side-by-side gap widths can be formed between the first roller conveying unit and the second roller conveying unit, under any of the side-by-side gap widths, one of the plurality of driving gears meshes with one of the plurality of driven gears, when the driving gear drives the driven gear to rotate, the transmission gear 12 can rotate synchronously, and in turn can drive the roller 16 to roll synchronously, so as to realize the conveying of the boom workpiece 4. Since the first roller conveying unit and the second roller conveying unit share the same driving shaft 7, the rollers 16 of the first roller conveying unit and the second roller conveying unit can roll at the same rotational speed under the driving of the roller driving mechanism 6, so that the boom workpiece 4 being pushed can move smoothly.

[0070] In an embodiment, referring to Figure 4 , in the first roller conveying unit or the second roller conveying unit, the driving gears include a narrow-distance driving gear 8 and a wide-distance driving gear 10, the driven gears include a narrow-distance driven gear 9 and a wide-distance driven gear 11, and the side-by-side gap widths include a first side-by-side gap width and a second side-by-side gap width, under the first side-by-side gap width, the narrow-distance driving gear 8 meshes with the narrow-distance driven gear 9, and under the second side-by-side gap width, the wide-distance driving gear 10 meshes with the wide-distance driven gear 11. Thus, referring to Figure 1 , under the action of the roller width adjusting mechanism, when it is needed to convey the boom workpiece 4 with a flat surface, the side-by-side gap width between the first roller conveying unit and the second roller conveying unit is at the first side-by-side gap width, at this time, the narrow-distance driving gear 8 meshes with the narrow-distance driven gear 9, thereby driving the roller 16 to rotate synchronously, so as to complete the conveying of the boom workpiece 4; when it is needed to convey the boom workpiece 4 with a flange on the surface, the first side-by-side gap width can be adjusted to the second side-by-side gap width, at this time, the wide-distance driving gear 10 meshes with the wide-distance driven gear 11, thereby driving the roller 16 to rotate synchronously, so as to complete the conveying of the boom workpiece 4. It can be seen that, through the matching meshing of the narrow-distance driving gear 8 and the narrow-distance driven gear 9, and the matching meshing of the wide-distance driving gear 10 and the wide-distance driven gear 11, the conveying of different boom workpieces 4 can be realized.

[0071] In an embodiment, the roller width adjusting mechanism includes a reverse screw 20 and a roller width adjusting motor 18, referring to Figure 4 , the reverse screw 20 extends along the unit width direction, and its two ends are respectively connected to the ends of the first roller conveying unit and the second roller conveying unit that are close to each other, and the roller width adjusting motor 18 is used to drive the reverse screw 20 to rotate forward or reverse to adjust the side-by-side gap width.

[0072] Specifically, the roller width adjustment motor 18 can be arranged below the reverse screw rod 20, and the motor shaft of the roller width adjustment motor 18 is driven by the belt 19 to drive the reverse screw rod 20 to rotate forward or reverse. The thread directions of the two ends of the reverse screw rod 20 are opposite, that is, when the reverse screw rod 20 rotates forward or reverse, the first roller conveying unit and the second roller conveying unit can be driven to move relatively close or relatively far away. Thus, when the first roller conveying unit and the second roller conveying unit are relatively far away, the side-by-side gap width thereof can be changed from the first side-by-side gap width to the second side-by-side gap width; when the first roller conveying unit and the second roller conveying unit are relatively close, the side-by-side gap width thereof can be changed from the second side-by-side gap width to the first side-by-side gap width.

[0073] In an embodiment, the roller width adjustment mechanism can be a medium driving cylinder, such as an electric cylinder, an electric oil cylinder, etc., and the two ends of the medium driving cylinder are respectively installed at the close-to-each-other ends of the side-by-side first roller conveying unit and the second roller conveying unit. Thus, the first roller conveying unit and the second roller conveying unit can be driven to relatively close or relatively far away by the extension and retraction of the two ends of the medium driving cylinder, so as to adjust the side-by-side gap width, which is suitable for conveying different boom workpieces 4.

[0074] As shown in Figures 1 to 3 The second exemplary embodiment of the present application provides a workpiece conveying line, which comprises the above roller conveying device and a plurality of plate chain conveying belts 1, wherein a plurality of roller conveying devices are arranged in sequence along the unit length direction, and the plurality of plate chain conveying belts 1 extend along the unit width direction and are arranged in sequence along the unit length direction, the plate chain conveying belts 1 can be inserted between adjacent roller conveying devices, and the plate chain conveying belts 1 can be driven to work by the plate chain driving motor 2. Thus, the plate chain conveying belts 1 can convey the boom workpiece 4 from the outside to the roller conveying device, and during the operation, one of the plate chain conveying belts 1 can be selected according to the actual position of the boom workpiece 4 for conveying, and the boom workpiece 4 conveyed by the plate chain conveying belt 1 can fall into a roller conveying device at a corresponding position, so as to improve the efficiency of the workpiece conveying process. Obviously, the workpiece conveying line of the present exemplary embodiment also has all the technical effects brought by the above roller conveying device, and thus will not be repeated here.

[0075] In an embodiment, referring to Figure 2 and Figure 3, the plate chain height of the plate chain conveyor 1 can be adjusted, specifically, the plate chain conveyor 1 can be lifted or lowered by the lifting movement of the plate chain lifting cylinder 3. The workpiece conveying line further comprises a controller (not shown in the drawings), which can communicate with the plate chain lifting cylinder 3 and is configured to: control the plate chain conveyor 1 to be at the first plate chain height during the feeding or conveying of the plate chain conveyor 1; control the plate chain conveyor 1 to be lowered to the second plate chain height when the plate chain conveyor 1 conveys the workpiece directly above the drum conveying device, so that the conveyed workpiece falls on the drum conveying device. The first plate chain height is greater than the drum conveying plane of the drum conveying device, and the second plate chain height is less than the drum conveying plane. Thus, the controller can control the plate chain conveyor 1 to adjust the height, so that the plate chain conveyor 1 can transfer the boom workpiece 4 to the drum conveying plane of the drum conveying device, and after transferring the workpiece, the plate chain conveyor 1 can be raised to the first plate chain height, so that the drum conveying device is not blocked by the boom workpiece 4.

[0076] In actual production, different boom workpieces 4 may be alternately fed, and the conveying speed of the drum conveying device is relatively fast, so it is necessary to repeatedly adjust the width of the drum conveying device according to the actual feeding workpiece, and the adjustment rhythm is relatively fast.

[0077] Based on the above actual production requirements, the controller can be further configured to:

[0078] identify the type information of the workpiece to be conveyed and determine that the surface of the workpiece has a protruding part (for example, the flange of the boom workpiece);

[0079] control the drum width adjusting mechanism to adjust the side-by-side gap width between the first drum conveying unit and the second drum conveying unit to a set width;

[0080] control the plate chain conveyor 1 to feed and convey the workpiece to the drum conveying device, so that the protruding part on the workpiece falls into the side-by-side gap width.

[0081] When the input workpiece has a protruding part, the controller can control the drum width adjusting mechanism to drive the first drum conveying unit and the second drum conveying unit to move relatively far away, so as to widen the side-by-side gap width; when the input workpiece does not have a protruding part, the controller can control the drum width adjusting mechanism to drive the first drum conveying unit and the second drum conveying unit to move relatively close, so as to narrow the side-by-side gap width. In this way, automatic identification of the workpiece and automatic adjustment of the width of the drum conveying device can be realized, which is suitable for the feeding rhythm of different workpieces, ensures that the protruding part of the workpiece can fall into the side-by-side gap during conveying, and meets the conveying requirements of the workpiece.

[0082] The optional embodiments of the embodiments of the application are described in detail above in combination with the drawings, but the embodiments of the application are not limited to the specific details in the above-described embodiments. Within the technical concept range of the embodiments of the application, the technical solutions of the embodiments of the application can be variously and simply modified, and these simple modifications all belong to the protection range of the embodiments of the application.

[0083] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the various possible combinations are not described again by the embodiments of the application.

[0084] In addition, the various different embodiments of the embodiments of the application can also be combined in any manner, as long as it does not deviate from the idea of the embodiments of the application, and it should also be considered as disclosed by the embodiments of the application.

Claims

1. A roller conveyor device, characterized in that, The roller conveyor includes: A first roller conveyor unit and a second roller conveyor unit are arranged side by side, wherein the length direction of the first roller conveyor unit and the width direction of the second roller conveyor unit is the roller conveying direction and the side-by-side direction of the conveyor units is the conveying unit side by side; A roller width adjustment mechanism is used to adjust the width of the side-to-side gap between the first roller conveyor unit and the second roller conveyor unit; and A shared drive mechanism is used to synchronously drive the first roller conveyor unit and the second roller conveyor unit. The first roller conveyor unit and the second roller conveyor unit both include: A frame (5) is provided with a plurality of rollers (16) arranged at intervals along the length of the unit. The rollers (16) extend along the width of the unit and the plurality of rollers (16) form a roller conveying plane. The roller width adjustment mechanism and the common drive mechanism are installed below the surface of the frame. When the input workpiece has a protrusion, the roller width adjustment mechanism drives the first roller conveying unit and the second roller conveying unit to move away from each other to widen the side-by-side gap width; when the input workpiece does not have a protrusion, the roller width adjustment mechanism drives the first roller conveying unit and the second roller conveying unit to move closer to each other to narrow the side-by-side gap width.

2. The roller conveyor according to claim 1, characterized in that, The frame surface is provided with a support bracket (17) that serves as an end support for the roller (16), and the support bracket (17) is a long strip that extends along the length direction of the unit. The height of the support bracket (17) is lower than the roller conveying plane.

3. The roller conveyor according to claim 2, characterized in that, The inner end of the roller (16) is pivotally mounted on the support bracket (17), and the outer end of the roller (16) is fitted with a roller power transmission gear (15). The roller power transmission gear (15) of each roller (16) is connected by a transmission chain (21) through integrated meshing. Among them, the outer end of the roller (16) at the beginning of the unit along the length direction is also fitted with a roller drive gear (14).

4. The roller conveyor according to claim 1, characterized in that, The shared drive mechanism includes: The roller drive mechanism (6) drives the drive shaft (7) extending along the width direction of the unit to rotate. The drive shaft (7) is provided with a plurality of axially spaced drive gears. The intermediate transmission gear set includes a transmission gear (12) that is connected to the roller (16) and a plurality of driven gears that are coaxially arranged with the transmission gear (12) and axially spaced apart. Under the action of the roller width adjustment mechanism, multiple parallel gap widths can be formed between the first roller conveying unit and the second roller conveying unit. Under any of the parallel gap widths, one of the multiple driving gears and one of the multiple driven gears form a meshing transmission.

5. The roller conveyor according to claim 4, characterized in that, Within the first roller conveyor unit or the second roller conveyor unit, the driving gear includes a narrow-pitch driving gear (8) and a wide-pitch driving gear (10), and the driven gear includes a narrow-pitch driven gear (9) and a wide-pitch driven gear (11). Furthermore, the side-by-side gap width includes a first side-by-side gap width and a second side-by-side gap width. Under the first side-by-side gap width, the narrow-pitch drive gear (8) meshes with the narrow-pitch driven gear (9) for transmission. Under the second side-by-side gap width, the wide-pitch drive gear (10) meshes with the wide-pitch driven gear (11) for transmission.

6. The roller conveyor according to any one of claims 1 to 5, characterized in that, The roller width adjustment mechanism includes: A reverse lead screw (20) extends along the width direction of the unit, and the two ends of the reverse lead screw (20) are respectively connected to the close ends of the first roller conveyor unit and the second roller conveyor unit that are side by side; A roller width adjustment motor (18) is used to drive the reverse lead screw (20) to rotate forward or reverse to adjust the side-by-side gap width.

7. The roller conveyor according to any one of claims 1 to 5, characterized in that, The roller width adjustment mechanism is a medium-driven cylinder, and the two ends of the medium-driven cylinder are respectively installed at the close ends of the first roller conveying unit and the second roller conveying unit that are side by side.

8. A workpiece conveying line, characterized in that, The workpiece conveyor line includes: According to any one of claims 1 to 7, the multiple sections of the roller conveyor are arranged at intervals along the length of the unit; and Multiple plate chain conveyor belts (1) extend along the width direction of the unit and are spaced apart along the length direction of the unit. The plate chain conveyor belts (1) are inserted between adjacent sections of the roller conveyor device.

9. The workpiece conveyor line according to claim 8, characterized in that, The height of the plate chain conveyor belt (1) is adjustable, and the workpiece conveyor line includes a controller configured to: During the material receiving or conveying process of the plate chain conveyor belt (1), the plate chain conveyor belt (1) is controlled to be located at the first plate chain height; When the plate chain conveyor belt (1) transports material to directly above the roller conveyor device, the plate chain conveyor belt (1) is controlled to descend to the second plate chain height, and the conveyed workpiece is dropped onto the roller conveyor device; Wherein, the height of the first plate chain is greater than the roller conveying plane of the roller conveyor, and the height of the second plate chain is less than the roller conveying plane.

10. The workpiece conveying line according to claim 9, characterized in that, The controller is also configured to: Identify the type information of the workpiece to be transported and determine that the surface of the workpiece has protrusions; Control the roller width adjustment mechanism to adjust the side-by-side gap width between the first roller conveying unit and the second roller conveying unit to a set width; Control the plate chain conveyor belt (1) to receive and transport the material to the roller conveyor device, and set the protrusion on the workpiece to enter the side-by-side gap width.

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