Width-adjustable track conveying device

Abstract

The utility model relates to the technical field of workpiece conveying, and provides a width-adjustable rail conveying device which comprises a base, two lead screws, two conveying rails and a driving mechanism, and the two lead screws are rotationally arranged on the base; the two conveying rails are arranged in parallel at an interval; the driving mechanism comprises a motor, a synchronous wheel, a synchronous belt and a pressing wheel; the synchronous belt is arranged on the outer sides of the three synchronous wheels in a sleeving mode. The pressing wheel is rotationally arranged on the base and located between the motor and one of the lead screws, and the distance between the center line of the pressing wheel and the plane where the center lines of the two lead screws are located is smaller than the sum of the radius of the pressing wheel and the radius of the synchronizing wheel. The pressing wheel is arranged, the position of the pressing wheel is limited, the contact area of the synchronous belt and the synchronous wheel on the lead screw can be larger than half of the side area of the synchronous wheel, and therefore synchronous rotation of the synchronous belt and the synchronous wheel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece conveying, in particular to an adjustable-width track conveying device. Background Art

[0002] During the production process of workpieces, track conveying devices are usually used to convey workpieces, enabling the workpieces to flow between different processing procedures, improving the processing efficiency of the workpieces, and promoting the automated operation of workpiece processing. When conveying workpieces of different specifications, it is necessary to adjust the width of the track conveying device so that the track conveying device can convey workpieces of different specifications.

[0003] The utility model with the publication number of CN212923062U discloses a roller-type width-adjustable track, including a frame module, a first roller conveying module, a second roller conveying module and a width-adjusting module. The width-adjusting module is fixedly installed on the frame module. A first roller conveying module is fixedly installed on one side of the width-adjusting module, and a second roller conveying module is slidably installed on the other side of the width-adjusting module. The second roller conveying module is parallel to the first roller conveying module, and the width-adjusting module adjusts the distance between the first roller conveying module and the second roller conveying module. By arranging a width-adjusting module between the conventional conveying module and the frame module and using the width-adjusting module to adjust the position of one of the conveying modules, the problem of inaccurate manual adjustment is avoided. The width-adjusting module adopts the cooperation of a motor, a lead screw and a slider. The motor and the lead screw are driven by a belt, with high synchronization rate and faster and more accurate adjustment.

[0004] In the above technical solution, in order to synchronously adjust two lead screws, a width-adjusting motor, a first synchronous belt, a synchronous pulley and a tension pulley are provided. However, since the width-adjusting motor and the two lead screws are arranged in a triangular arrangement, the contact area between the synchronous belt and the synchronous pulley is relatively small, which is not conducive to ensuring the synchronous rotation of the synchronous belt and the synchronous pulley. Utility Model Content

[0005] In view of this, the utility model provides an adjustable-width track conveying device, which can increase the contact area between the synchronous belt and the synchronous pulley and ensure the synchronous rotation of the synchronous belt and the synchronous pulley.

[0006] The technical solution of the utility model is realized as follows: The utility model provides an adjustable-width track conveying device, including a base, two lead screws, two conveying tracks and a driving mechanism, wherein,

[0007] Both of the two lead screws are rotatably arranged on the base, and they are parallel and spaced apart;

[0008] The two conveying tracks are parallel and spaced apart. One of them is fixedly arranged on the base, and the other is threadedly connected to the two lead screws;

[0009] The driving mechanism includes a motor, a synchronous pulley, a synchronous belt, and a pressing pulley. The motor is fixedly arranged on the base. The synchronous pulleys are coaxially fixed to the output end of the motor and the two lead screws respectively. The synchronous belt is sleeved outside the three synchronous pulleys. The pressing pulley is rotatably arranged on the base and abuts against the outside of the synchronous belt. The pressing pulley is located between the motor and one of the lead screws, and the distance from the center line of the pressing pulley to the plane where the center lines of the two lead screws are located is less than the sum of the radius of the pressing pulley and the radius of the synchronous pulley.

[0010] On the basis of the above technical solution, preferably, two pressing pulleys are provided, and the two pressing pulleys are oppositely arranged on both sides of the motor.

[0011] More preferably, the base includes a base seat and a movable seat. Among them,

[0012] The motor is fixedly arranged on the base seat;

[0013] The movable seat is detachably fixed on the base seat, and the pressing pulley is rotatably arranged on the movable seat.

[0014] More preferably, fixing holes are formed in the base seat, sliding holes are formed in both the base seat and the movable seat. The cross-section of the fixing hole is circular, the cross-section of the sliding hole is oblong, and the sliding holes on the movable seat are fixedly connected to the fixing hole and the sliding holes on the base seat through bolts respectively.

[0015] On the basis of the above technical solution, preferably, a stabilizing frame is further included. The stabilizing frame includes a jacking plate, a slide rail, a slider, and a plurality of sliding shafts. Among them,

[0016] The jacking plate is arranged on the base;

[0017] The slide rail is fixedly arranged on the jacking plate;

[0018] The slider is slidably arranged on the slide rail;

[0019] A plurality of sliding shafts are fixedly arranged on the jacking plate and the slider respectively. The sliding shafts arranged on the jacking plate are slidably connected to the conveying rail fixedly connected to the base, and the sliding shafts arranged on the slider are slidably connected to the conveying rail threadedly engaged with the lead screw. The plurality of sliding shafts are arranged in parallel, and the length directions of the sliding shafts, the length direction of the slide rail, and the length direction of the conveying rail are perpendicular to each other pairwise.

[0020] More preferably, the stabilizing frame further includes a jacking frame which is fixedly arranged on the jacking plate and used for jacking up the workpiece between the two conveying rails.

[0021] More preferably, the stabilizing frame further includes a jacking telescopic cylinder which is fixedly arranged on the base and whose output end is fixedly connected with the jacking plate.

[0022] Based on the above technical solutions, preferably, it further includes a plurality of stabilizing shafts which are fixedly arranged on the base, parallel and spaced from the lead screw, and the conveying rail which is in threaded cooperation with the lead screw is slidably connected with the stabilizing shafts;

[0023] The center lines of at least one of the stabilizing shafts are coplanar with the center lines of the two lead screws, and the plane where the center lines of at least one of the stabilizing shafts and the center line of one of the lead screws are located is perpendicular to the plane where the center lines of the two lead screws are located.

[0024] Based on the above technical solutions, preferably, the conveying rail includes a guide rail and a belt conveyor which is fixedly arranged on the guide rail and used for conveying workpieces.

[0025] More preferably, the belt conveyor includes a conveying motor, a plurality of conveying wheels and a conveyor belt. Among them,

[0026] The conveying motor is fixedly arranged on the guide rail;

[0027] The plurality of conveying wheels are respectively rotatably arranged on the guide rail and coaxially fixed on the output end of the conveying motor;

[0028] The conveyor belt is sleeved on the plurality of conveying wheels.

[0029] A width-adjustable track conveying device of the present utility model has the following beneficial effects compared with the prior art:

[0030] (1) By arranging the pressing wheel and restricting the position of the pressing wheel, the contact area between the synchronous belt and the synchronous pulley on the lead screw can be made larger than half of the side area of the synchronous pulley, thereby ensuring the synchronous rotation of the synchronous belt and the synchronous pulley;

[0031] (2) By arranging the stabilizing frame, not only can the stability of the width adjustment operation of the track conveying device be improved, but also the workpiece can be jacked up to realize the buffer and temporary storage of the workpiece on the track conveying device;

[0032] (3) By arranging the stabilizing shafts and restricting the layout positions of the stabilizing shafts, the fixing firmness of each component in the track conveying device can be improved, thereby ensuring the stable operation of the track conveying device. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 Is a perspective view of the guide rail in a width-adjustable track conveying device of the present invention;

[0035] Figure 2 Is a perspective view of a width-adjustable track conveying device of the present invention;

[0036] Figure 3 Is a cross-sectional view of the drive mechanism in a width-adjustable track conveying device of the present invention;

[0037] Figure 4 Is a perspective view of the motor in a width-adjustable track conveying device of the present invention;

[0038] Figure 5 Is a cross-sectional view of the sliding hole in a width-adjustable track conveying device of the present invention;

[0039] Figure 6 Is a perspective view of the stabilizing frame in a width-adjustable track conveying device of the present invention;

[0040] Figure 7 Is a perspective view of the slider in a width-adjustable track conveying device of the present invention;

[0041] Figure 8 Is a cross-sectional view of the stabilizing shaft in a width-adjustable track conveying device of the present invention;

[0042] Figure 9 Is a perspective view of the belt conveyor in a width-adjustable track conveying device of the present invention.

[0043] Wherein: 1. Base; 11. Foundation; 12. Movable seat; 101. Fixed hole; 102. Sliding hole; 2. Lead screw; 3. Conveyor track; 31. Guide rail; 32. Belt conveyor; 321. Conveyor motor; 322. Conveyor wheel; 323. Conveyor belt; 4. Drive mechanism; 41. Motor; 42. Synchronous pulley; 43. Synchronous belt; 44. Pressing wheel; 5. Stabilizing frame; 51. Lifting plate; 52. Slide rail; 53. Slider; 54. Slide shaft; 55. Lifting frame; 56. Lifting telescopic cylinder; 6. Stabilizing shaft. Detailed Embodiments

[0044] The technical solutions in the present utility model will be clearly and completely described below in conjunction with the specific embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0045] As Figures 1-9 shown, a width-adjustable track conveying device of the present utility model includes a base 1, two lead screws 2, two conveying tracks 3, a driving mechanism 4, a stabilizing frame 5 and a plurality of stabilizing shafts 6.

[0046] Among them, the base 1 is used to carry other components.

[0047] The lead screws 2 are used to drive the conveying tracks 3 to move. The two lead screws 2 are both rotatably arranged on the base 1, and the two lead screws 2 are parallel and spaced apart.

[0048] The conveying tracks 3 are used to convey workpieces. The two conveying tracks 3 are parallel and spaced apart. One of the two conveying tracks 3 is fixedly arranged on the base 1, and the other of the two conveying tracks 3 is connected to the two lead screws 2 through a threaded fit. The two lead screws 2 can also maintain the moving stability of the conveying track 3 connected thereto. As Figure 1 shown, when the two lead screws 2 rotate synchronously, by using the threaded fit between the lead screw 2 and one of the conveying tracks 3, the conveying track 3 connected to the lead screw 2 can be driven to move along the length direction of the lead screw 2, so as to adjust the distance between the two conveying tracks 3, realize the width adjustment of the present track conveying device, and make the present track conveying device adaptable to workpieces of different specifications.

[0049] The driving mechanism 4 is used to drive the two lead screws 2 to rotate synchronously. The driving mechanism 4 includes a motor 41, a synchronous pulley 42, a synchronous belt 43 and a pressing pulley 44. The motor 41 is fixedly arranged on the base 1, and the synchronous pulleys 42 are coaxially fixed on the output end of the motor 41 and the two lead screws 2 respectively; the synchronous belt 43 is sleeved outside the three synchronous pulleys 42; when the motor 41 is started, by using the rolling fit between the synchronous belt 43 and the synchronous pulley 42, the two lead screws 2 can follow the output end of the motor 41 to rotate synchronously, realizing the automatic operation of the width adjustment operation of the present track conveying device.

[0050] The pressing wheel 44 is rotatably arranged on the base 1 and abuts against the outer side of the synchronous belt 43, so that the synchronous belt 43 is in a tense state, avoiding slippage between the synchronous belt 43 and the synchronous pulley 42; the pressing wheel 44 is located between the motor 41 and one of the lead screws 2, that is, the synchronous belt 43 abuts against the synchronous pulley 42 on the motor 41, the pressing wheel 44 and the synchronous pulley 42 on one of the lead screws 2 in sequence. The distance from the center line of the pressing wheel 44 to the plane where the center lines of the two lead screws 2 are located is less than the sum of the radius of the pressing wheel 44 and the radius of the synchronous pulley 42; As Figure 3 shown, taking the synchronous pulley 42 on the left side in the figure as an example, the center lines of the two lead screws 2 are located on the horizontal plane α. The sum of the radius of the left synchronous pulley 42 and the radius of the left pressing wheel 44 is greater than the distance from the center line of the left pressing wheel 44 to the horizontal plane α. Therefore, the synchronous belt 43 at the lower side position of the left synchronous pulley 42 is horizontal, while the synchronous belt 43 at the upper side position is inclined and gradually slopes downward from left to right, making the contact area between the left synchronous pulley 42 and the synchronous belt 43 greater than half of the side area of the synchronous pulley 42, increasing the friction between the left synchronous pulley 42 and the synchronous belt 43, making their connection more stable, avoiding slippage, and thus ensuring the synchronous rotation of the synchronous belt 43 and the synchronous pulley 42.

[0051] As Figure 3 shown, there are two pressing wheels 44, and the two pressing wheels 44 are relatively arranged on both sides of the motor 41, so that the synchronous pulleys 42 on the two lead screws 2 can be stably connected to the synchronous belt 43, improving the driving stability of the driving mechanism 4.

[0052] The base 1 includes a base 11 and a movable seat 12. The base 11 is used to carry and fix the lead screw 2 and one of the conveying rails 3, and the motor 41 is fixedly arranged on the base 11; the movable seat 12 is detachably fixed on the base 11, and the two adopt a quick-release structure. The pressing wheel 44 is rotatably arranged on the movable seat 12. By quickly disassembling the movable seat 12 and the base 11, the pressing wheel 44 can be quickly disassembled, so as to realize the quick maintenance and replacement of the synchronous belt 43, improving the maintenance efficiency of the driving mechanism 4.

[0053] As Figure 4 and Figure 5 shown, a fixing hole 101 is formed on the base 11, and sliding holes 102 are formed on both the base 11 and the movable seat 12. The cross-section of the fixing hole 101 is circular, and the cross-section of the sliding hole 102 is oblong. The sliding holes 102 on the movable seat 12 are fixedly connected to the fixing hole 101 and the sliding holes 102 on the base 11 through bolts. By using this connection method and connection structure, as long as the bolts are loosened, the movable seat 12 can be slid relative to the base 11, so that the pressing wheel 44 abuts against or moves away from the synchronous belt 43, realizing the quick replacement of the synchronous belt 43 without disassembling the bolts.

[0054] The stabilizer 5 is used to improve the stability of the width adjustment operation of the track conveying device. The stabilizer 5 includes a jacking plate 51, a slide rail 52, a slider 53, a plurality of slide shafts 54, a jacking frame 55, and a jacking telescopic cylinder 56. As Figure 6 and Figure 7 shown, the jacking plate 51 is arranged on the base 1; the slide rail 52 is fixedly arranged on the jacking plate 51; the slider 53 is slidably arranged on the slide rail 52; a plurality of slide shafts 54 are respectively fixedly arranged on the jacking plate 51 and the slider 53. The slide shaft 54 arranged on the jacking plate 51 is slidably connected with the conveying rail 3 fixedly connected with the base 1, and the slide shaft 54 arranged on the slider 53 is slidably connected with the conveying rail 3 threadedly engaged with the lead screw 2. The plurality of slide shafts 54 are arranged in parallel, and the length directions of the slide shaft 54, the slide rail 52, and the conveying rail 3 are perpendicular to each other in pairs. When the distance between the two conveying rails 3 changes, it can drive the slider 53 to slide on the slide rail 52, and make the slide shaft 54 on the slider 53 move synchronously with the slider 53 and the conveying rail 3, improving the movement stability of the conveying rail 3. At the same time, by using the sliding of the slide shaft 54 and the conveying rail 3, the position of the jacking plate 51 in the length direction of the slide shaft 54 can be adjusted at any time, rather than being limited to fixing the jacking plate 51 at a specific position.

[0055] The jacking frame 55 is fixedly arranged on the jacking plate 51. By moving the jacking plate 51 up and down, the jacking frame 55 can be driven to move up and down. When the jacking frame 55 is located below the two conveying rails 3, the conveying rail 3 conveys the workpiece, and when the jacking frame 55 moves up to the upper part of the conveying rail 3, the workpiece between the two conveying rails 3 can be jacked up to realize the caching operation of the workpiece.

[0056] The jacking telescopic cylinder 56 is fixedly arranged on the base 1, and its output end is fixedly connected with the jacking plate 51, so as to drive the jacking plate 51 and the jacking frame 55 to perform automatic lifting through the expansion and contraction adjustment of the output end of the jacking telescopic cylinder 56.

[0057] The stabilizing shaft 6 is used to improve the fixing stability of the base 1, the lead screw 2, and the conveying rail 3. The stabilizing shaft 6 is fixedly arranged on the base 1, is parallel and spaced from the lead screw 2, and the conveying rail 3 threadedly engaged with the lead screw 2 is slidably connected with the stabilizing shaft 6, thereby improving the movement stability of the conveying rail 3.

[0058] The center line of at least one stabilizing shaft 6 is arranged in the same plane as the center lines of the two lead screws 2, and the plane where the center line of at least one stabilizing shaft 6 and the center line of one of the lead screws 2 are located is perpendicular to the plane where the center lines of the two lead screws 2 are located. As Figure 8As shown in the figure, the two lower stabilizing shafts 6 and the two lead screws 2 are on the same horizontal plane. The two upper stabilizing shafts 6 correspond to the two lead screws 2 respectively, and the corresponding stabilizing shaft 6 and lead screw 2 are arranged vertically. With this arrangement, multiple stabilizing shafts 6 can effectively limit the conveying rail 3 and prevent the conveying rail 3 from deflecting during the adjustment and movement process.

[0059] As Figure 8 shown in the figure, the conveying rail 3 includes a guide rail 31 and a belt conveyor 32. The belt conveyor 32 is fixedly arranged on the guide rail 31. The belt conveyor 32 is used to convey workpieces, so that the workpieces are conveyed along the length direction of the guide rail 31.

[0060] As Figure 9 shown in the figure, the belt conveyor 32 includes a conveying motor 321, multiple conveying wheels 322 and a conveyor belt 323. The conveying motor 321 is fixedly arranged on the guide rail 31; multiple conveying wheels 322 are respectively rotatably arranged on the guide rail 31 and coaxially fixed on the output end of the conveying motor 321; the conveyor belt 323 is sleeved on multiple conveying wheels 322; the upper position of the conveyor belt 323 is parallel to the length direction of the guide rail 31. When the conveying motor 321 is started, the conveyor belt 323 can be driven to convey the workpieces; at the same time, in order to improve the tightness of the conveyor belt 323, multiple conveying wheels 322 can also be arranged to abut against the lower side of the conveyor belt 323. The principle and structure of this are the same as those of the pressing wheel 44 in the driving mechanism 4.

[0061] The usage method of a width-adjustable track conveying device of the present utility model is as follows:

[0062] When it is necessary to adjust the width of the present track conveying device, first start the motor 41 to make the two lead screws 2 rotate synchronously with the output end of the motor 41, thereby driving the conveying rail 3 threadedly engaged with the lead screws 2 to move, so as to adjust the distance between the two conveying rails 3. After the distance between the two conveying rails 3 is adapted to the size of the workpiece, turn off the motor 41; during the conveying of the workpieces by the present track conveying device, the lifting telescopic cylinder 56 can also be used to drive the lifting frame 55 to lift, so as to lift the workpieces on the conveying rail 3 and realize the buffer and temporary storage of the workpieces.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A track conveying device with adjustable width, characterized in that: It comprises a base (1), two screw rods (2), two conveying rails (3) and a driving mechanism (4), wherein: The two screw rods (2) are both rotatably arranged on the base (1), and are arranged in parallel and at intervals; The two conveying rails (3) are arranged in parallel and at intervals, one of which is fixedly arranged on the base (1), and the other is connected to the two screw rods (2) by threaded engagement; The driving mechanism (4) comprises a motor (41), a synchronous wheel (42), a synchronous belt (43) and a pressure wheel (44); the motor (41) is fixedly arranged on the base (1); the synchronous wheel (42) is coaxially fixed on the output end of the motor (41) and the two screw rods (2); the synchronous belt (43) is sleeved on the outer sides of the three synchronous wheels (42); the pressure wheel (44) is rotatably arranged on the base (1) and abuts against the outer side of the synchronous belt (43); the pressure wheel (44) is located between the motor (41) and one of the screw rods (2), and the distance between its center line and the plane where the center lines of the two screw rods (2) are located is less than the sum of the radii of the pressure wheel (44) and the synchronous wheel (42).

2. A width-adjustable track conveying device as claimed in claim 1, characterized in that: Two pressing wheels (44) are provided, and the two pressing wheels (44) are arranged opposite to each other on two sides of the motor (41).

3. A width-adjustable track conveying device as claimed in claim 2, characterized in that: The base (1) comprises a pedestal (11) and a movable seat (12), wherein: The motor (41) is fixedly arranged on the base (11); The movable seat (12) is detachably fixed on the base (11), and the pressing wheel (44) is rotatably arranged on the movable seat (12).

4. A width-adjustable track conveying device as claimed in claim 3, characterized in that: The base (11) is provided with a fixing hole (101), and the base (11) and the movable seat (12) are both provided with a sliding hole (102); the cross section of the fixing hole (101) is circular, and the cross section of the sliding hole (102) is oblong; and the sliding hole (102) on the movable seat (12) is respectively fixedly connected to the fixing hole (101) and the sliding hole (102) on the base (11) by bolts.

5. A width-adjustable track conveying device as claimed in claim 1, characterized in that: It also includes a stabilizing frame (5), the stabilizing frame (5) including a lifting plate (51), a slide rail (52), a slide block (53) and a plurality of slide shafts (54), wherein: The lifting plate (51) is arranged on the base (1); The slide rail (52) is fixedly arranged on the lifting plate (51); The sliding block (53) is slidably arranged on the sliding rail (52); The plurality of sliding shafts (54) are respectively fixedly arranged on the lifting plate (51) and the sliding block (53); the sliding shaft (54) arranged on the lifting plate (51) is slidably connected to the conveying rail (3) fixedly connected to the base (1); the sliding shaft (54) arranged on the sliding block (53) is slidably connected to the conveying rail (3) connected to the screw rod (2) by threaded cooperation; the plurality of sliding shafts (54) are arranged in parallel, and the length direction of the sliding shaft (54), the length direction of the sliding rail (52) and the length direction of the conveying rail (3) are perpendicular to each other.

6. A width-adjustable track conveying device as claimed in claim 5, characterized in that: The stabilizing frame (5) further comprises a lifting frame (55), wherein the lifting frame (55) is fixedly arranged on the lifting plate (51) and is used for lifting the workpiece between the two conveying rails (3).

7. A width-adjustable track conveying device as claimed in claim 6, characterized in that: The stabilizing frame (5) further comprises a lifting and telescopic cylinder (56), wherein the lifting and telescopic cylinder (56) is fixedly arranged on the base (1), and an output end thereof is fixedly connected to the lifting plate (51).

8. A width-adjustable track conveying device as claimed in claim 1, characterized in that: It also includes a plurality of stabilizing shafts (6), which are fixedly arranged on the base (1) and are arranged parallel to and spaced from the screw rod (2), and the conveying rail (3) connected to the screw rod (2) by threaded engagement is slidably connected to the stabilizing shafts (6); The center line of at least one of the stabilizing shafts (6) is coplanar with the center lines of the two screw rods (2), and the plane where the center line of at least one of the stabilizing shafts (6) and the center line of one of the screw rods (2) are located is perpendicular to the plane where the center lines of the two screw rods (2) are located.

9. A width-adjustable track conveying device as claimed in claim 1, characterized in that: The conveying rail (3) comprises a guide rail (31) and a belt conveyor (32); the belt conveyor (32) is fixedly arranged on the guide rail (31) and is used for conveying workpieces.

10. A width-adjustable track conveying device as claimed in claim 9, characterized in that: The belt conveyor (32) comprises a conveying motor (321), a plurality of conveying wheels (322) and a conveying belt (323), wherein: The conveying motor (321) is fixedly arranged on the guide rail (31); The plurality of conveying wheels (322) are rotatably disposed on the guide rail (31) and coaxially fixed on the output end of the conveying motor (321); The conveyor belt (323) is sleeved on the plurality of conveyor wheels (322).

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