An adjustable conveyor belt mechanism

Abstract

The utility model discloses an adjustable conveying belt mechanism relates to workpiece conveying technical field, and this mechanism includes the conveying belt for conveying workpiece, clamping subassembly sets up at the outside of conveying belt, and each setting has an extruding piece at its both ends, when conveying belt moves, drives two extruding pieces and carries out the opening and closing movement. The utility model discloses an adjustable conveying belt mechanism, because adopt the screw rod with transmission gear as the component part of conveying belt, and set up movable rack on the conveying belt, therefore, when transmission gear passes movable rack, can drive the screw rod and drive the clamping plate on it and carry out the opening and closing movement to the workpiece on the conveying belt and extrude, so, effectively solved the current lifting type counting device when using, cannot position and adjust the technical problem of workpiece, and then realized the workpiece clamping positioning in the conveying belt conveying process, and also can adjust workpiece position, to facilitate the subsequent workpiece processing.

Description

Technical Field

[0001] This utility model relates to the field of workpiece conveying technology, and in particular to an adjustable conveyor belt mechanism. Background Technology

[0002] In the processing of rod-shaped workpieces, it is necessary to simultaneously handle and process the rod material. With the continuous development and progress of mechanical manufacturing technology, the processing of rod-shaped workpieces has been gradually automated. For example, a robotic arm can be used to grab the rod material and place it into the processing equipment, and count the movement of the rod material.

[0003] Currently, a Chinese patent application with patent number "CN202121499341.X" discloses a lifting-type intelligent counting and screening machine, which relates to the field of packaging equipment technology. The machine features a storage silo fixedly mounted on one side of the frame, with a discharge port on its bottom surface. An elevator is mounted on the frame. A secondary vibratory feeding device is mounted on the frame at the output end of the primary vibratory feeding device via a mounting bracket, and the secondary device is connected to the primary device. A camera conveyor belt is fixedly mounted on the frame at the side of the secondary vibratory feeding device via a mounting bracket, and its input end is connected to the output end. A detection camera is fixedly mounted on a fixed rod and positioned above the camera conveyor belt. A brushing and unloading bin is fixedly mounted on the frame at the output end of the camera conveyor belt via a mounting bracket. While this design enables automated counting of products, the inability to position and adjust the workpiece leads to positional deviations, affecting subsequent processing.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were discovered:

[0005] The existing lifting-type counting device cannot position and adjust the workpiece. It requires lifting the workpiece first, followed by conveying it outwards. Counting occurs during lifting and conveying. However, because the rod-shaped workpiece is unrestricted during transport and lifting, and the device undergoes continuous reciprocating motion, it vibrates, causing the workpiece to shift. This leads to misalignment of subsequent processing equipment, resulting in processing errors or even workpiece damage, severely impacting the subsequent processing. Furthermore, the length and size of the workpieces to be counted and lifted vary depending on the application scenario. The workpieces are scattered and located in different positions, requiring manual intervention or robotic arms, significantly hindering the efficient use of resources. These auxiliary devices also occupy space, further congesting the already limited processing area. Therefore, we propose an adjustable conveyor belt mechanism. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the shortcomings of the existing technology, this utility model provides an adjustable conveyor belt mechanism, which solves the technical problem that the existing lifting counting device cannot position and adjust the workpiece during use.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An adjustable conveyor belt mechanism is installed at the discharge port of a push rod counter, the mechanism comprising:

[0011] A conveyor belt used for transporting workpieces, and the conveyor belt is fitted with a sleeve on the outside;

[0012] The clamping assembly is located outside the conveyor belt, with a pressing member at each end. When the conveyor belt moves, it drives the two pressing members to open and close.

[0013] The clamping assembly includes a lead screw evenly distributed on the belt, and the extrusion member is sleeved on the outside of the lead screw. The two are connected by threads. The end of the lead screw is in contact with the edge of the conveyor belt. When the belt moves relative to the conveyor belt, it drives the two extrusion members to open and close along the extension direction of the lead screw.

[0014] Preferably, the lead screw has two sets of threads on its exterior, with opposite spiral directions, located on the exterior of the lead screw near the end. The two extrusion members are respectively connected to the two sets of threads. When the lead screw rotates, the two extrusion members open and close under the action of the threads.

[0015] Preferably, the end of the lead screw is provided with a transmission gear, which meshes with the movable rack at the edge of the conveyor belt. When the transmission gear at the end of the lead screw slides along the movable rack, it drives the transmission gear to rotate.

[0016] A torsion spring is provided at the middle position of the lead screw, and the lead screw is connected to the sleeve through the torsion spring, so that it continuously stores force when the lead screw rotates.

[0017] Preferably, a set of limiting components is provided on each side of the conveyor belt. The limiting components are located above the conveyor belt and correspond to the transmission gear at the end of the lead screw, which can limit the range of motion of the lead screw.

[0018] The limiting component includes a limiting plate, and the length of the limiting plate is in the same direction as the length of the movable rack. When the lead screw moves above the conveyor belt, the transmission gear at the end of the lead screw is located between the limiting plate and the movable rack.

[0019] Preferably, the movable rack includes a base plate aligned with the length direction of the conveyor belt, and a plurality of protruding pins are evenly distributed on the top of the base plate, with slidable sliding teeth mounted on the protruding pins;

[0020] When the sliding tooth slides to the side of the bottom plate near the sleeve, the sliding tooth is located on the movement path of the lead screw;

[0021] When the sliding tooth slides to the bottom plate on the side away from the sleeve, the sliding tooth is not located on the movement path of the lead screw.

[0022] Preferably, the extrusion member includes a threaded cylinder sleeved on a lead screw, and a slidable clamping plate is sleeved on the outside of the threaded cylinder, the clamping plate being connected to the outer wall of the threaded cylinder by a spring.

[0023] Preferably, the outer side of the sleeve is evenly distributed with several partitions, and each partition corresponds to a lead screw. The lead screw is inserted into the partitions, and both ends of the lead screw extend out of the partitions.

[0024] The partition has guide grooves on both outer walls, and the clamping plate outside the threaded cylinder passes through the guide grooves and can slide along the guide grooves.

[0025] Preferably, the conveyor belt includes a plate-shaped support plate, and a side plate is installed on each side of the support plate. Two side rollers are arranged between the two side plates, and the two side rollers are respectively located on the front and rear sides of the support plate.

[0026] The sleeve is fitted around the outside of the two side rollers and around the outside of the support plate;

[0027] The movable rack is mounted on the side plate.

[0028] (III) Beneficial Effects

[0029] 1. Because a lead screw with a transmission gear is used as a component of the conveyor belt, and movable racks that can mesh with the transmission gear are set on both sides of the conveyor belt, the lead screw can be driven to rotate when the transmission gear passes the movable rack. The rotation of the lead screw drives the clamping plate on it to open and close, thereby squeezing the workpiece on the conveyor belt. Therefore, it effectively solves the technical problem that existing lifting counting devices cannot position and adjust the workpiece during use. It can clamp and position the workpiece during the conveyor belt conveying process, and can not only adjust the workpiece, but also clamp the workpiece, ensuring that the structure of the device remains neat after lifting, so as to facilitate subsequent workpiece processing.

[0030] 2. By employing movable sliding teeth as a component of the movable rack, the number of sliding teeth on the movement path of the transmission gear can be adjusted according to the length of the workpiece and the required clamping width, thereby controlling the number of rotations of the transmission gear and the lead screw. Since the clamping plate is connected to the lead screw via threads, the movement distance of the clamping plate can be adjusted by controlling the number of rotations of the lead screw, thus achieving the purpose of clamping workpieces of different lengths. Furthermore, by utilizing the torsion spring between the lead screw and the conveyor belt, energy is stored during the rotation of the lead screw, allowing it to reset under the action of the torsion spring when the lead screw moves out of the position of the movable rack, thus facilitating reuse and improving the applicability of the device.

[0031] 3. By sleeved a cylindrical threaded cylinder on the outside of the lead screw, and setting a clamping plate on the outside of the threaded cylinder, and the clamping plate is connected to the threaded cylinder by a spring, the deformation of the spring can avoid collisions caused by the inaccurate control of the number of rotations of the lead screw when the extrusion plate extrudes the workpiece, thereby improving the stability of the device and reducing unnecessary risks. Attached Figure Description

[0032] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0033] Figure 1 This is an overall structural diagram of an embodiment of the present utility model;

[0034] Figure 2 This is an exploded view of the conveyor belt and support in an embodiment of this utility model;

[0035] Figure 3 This is one of the exploded schematic diagrams of the conveyor belt in the embodiments of this utility model;

[0036] Figure 4 This is the second exploded view of the conveyor belt in this embodiment of the present invention;

[0037] Figure 5 This is an exploded view of the limiting component in an embodiment of the present invention;

[0038] Figure 6 This is an exploded view of the movable rack in an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the front and back surfaces of the sliding tooth in an embodiment of this utility model;

[0040] Figure 8 This is a schematic diagram of the movement state of the clamping plate in an embodiment of this utility model;

[0041] Figure 9 This is a structural diagram of the combined structure of the lead screw and the extrusion component in an embodiment of this utility model;

[0042] Figure 10 This is a structural diagram of the extrusion component in an embodiment of this utility model;

[0043] Figure 11 This is a schematic diagram of the conveyor belt's motion state in an embodiment of this utility model;

[0044] Figure 12 This is a schematic diagram of the push rod counting device in an embodiment of this utility model.

[0045] Legend:

[0046] 1. Bracket;

[0047] 2. Conveyor belt; 21. Support plate; 22. Side plate; 23. Side roller; 24. Belt sleeve; 25. Mounting base; 26. Partition plate;

[0048] 3. Clamping assembly; 31. Lead screw; 32. Torsion spring; 33. Transmission gear; 34. Extrusion part; 341. Threaded cylinder; 342. Clamping plate; 35. Movable rack; 351. Base plate; 352. Protruding pin; 353. Sliding tooth; 354. Slide groove;

[0049] 4. Positioning block;

[0050] 5. Limiting component; 51. Limiting plate; 52. Extrusion wall; 53. Connecting component;

[0051] 61. Motor; 62. Gearbox; 63. Drive gear. Detailed Implementation

[0052] This application provides an adjustable conveyor belt mechanism, effectively solving the technical problem that existing lifting counting devices cannot position and adjust workpieces during use. By employing a lead screw with a transmission gear as a component of the conveyor belt, and with movable racks on both sides of the conveyor belt that mesh with the transmission gear, the transmission gear drives the lead screw to rotate as it passes the movable racks. This rotation of the lead screw then drives the clamping plates on it to open and close, thereby pressing the workpiece onto the conveyor belt. This achieves workpiece clamping and positioning during conveyor belt transport, enabling both workpiece adjustment and clamping, ensuring that the device's structural form remains unchanged after lifting. The device is designed to hold workpieces neatly, facilitating subsequent workpiece processing. By employing movable sliding teeth as components of the movable rack, the number of sliding teeth on the transmission gear's movement path can be adjusted according to the workpiece's length and required clamping width, thereby controlling the number of rotations of the transmission gear and the lead screw. Since the clamping plate is threaded to the lead screw, the movement distance of the clamping plate can be adjusted by controlling the lead screw's rotation to a specific number of turns, thus achieving the purpose of clamping workpieces of different lengths. Furthermore, a torsion spring between the lead screw and the conveyor belt stores energy during lead screw rotation, allowing the lead screw to reset under the action of the torsion spring when it moves out of the movable rack's position, facilitating reuse and improving the device's applicability.

[0053] Example: The technical solution in this application effectively solves the technical problem that existing lifting counting devices cannot position and adjust the workpiece during use. The overall idea is as follows:

[0054] To address the problems existing in the prior art, this utility model provides an adjustable conveyor belt mechanism installed at the discharge port of a push rod counter. This conveyor mechanism mainly consists of three parts: first, a conveyor belt 2 that transports workpieces, the conveyor belt 2 having partitions 26 to separate workpieces during transport; second, a bracket 1 for connecting the conveyor belt 2 to the push rod counter, such as... Figure 12 As shown, bracket 1 ensures the stability of conveyor belt 2; and the last one is the clamping structure, which is also an important improvement point of ours. It is mainly to solve the problem of workpiece displacement and misalignment after counting and lifting. This device can be adjusted during the movement of conveyor belt 2, making it more efficient overall.

[0055] The details are as follows:

[0056] To ensure stable transport and support the workpiece, the conveyor belt 2 uses a plate-shaped support plate 21 as its main body. A side plate 22 is installed on each side of the support plate 21 (for connection to the bracket 1 and also to support the movable rack 35). Two side rollers 23 are then positioned between the two side plates 22, located on the front and rear sides of the support plate 21, respectively. Figure 3 and Figure 4 As shown, the loop-shaped sleeve 24 is sleeved on the outside of the two side rollers 23, so that the sleeve 24 corresponds to the outside of the support plate 21. During the transport of the workpiece, the workpiece support plate 21 supports the sleeve 24 passing on it to prevent the sleeve 24 from denting or other damage under the weight of the workpiece.

[0057] The power source is a motor 61 installed on one side of the conveyor belt 2, near the side roller 23. The side roller 23 at this position has a drive gear 63. The output shaft of the motor 61 is connected to the drive gear 63 through a gearbox 62. When the motor 61 is energized, the output shaft of the motor 61 rotates. The torque of the rotation is transmitted through the gearbox 62 to the side roller 23 of the drive gear 63. Since the belt sleeve 24 is sleeved on the two side rollers 23, the rotation of the side rollers 23 can drive the belt sleeve 24 to rotate, providing power for the rotation of the belt sleeve 24.

[0058] The bracket 1 is located below the conveyor belt 2, and multiple mounting seats 25 are symmetrically distributed on it. The mounting seats 25 can be connected to the positioning blocks 4 on both sides of the conveyor belt 2. When the bracket 1 is connected to the conveyor belt 2, the conveyor belt 2 can be installed on the bracket 1 through the positioning blocks 4 on both sides, thereby providing support for the conveyor belt 2. At the same time, by installing the bracket 1 onto the push rod counter, the connection between the conveyor belt 2 and the push rod counter is realized.

[0059] The clamping structure (clamping assembly 3) is also a key improvement we made. This device solves the problem of workpiece displacement and misalignment after counting and lifting. The device can be adjusted during the movement of the conveyor belt 2, making it more efficient overall.

[0060] The clamping structure mainly consists of a lead screw 31 inserted into a partition 26 and a pressing member 34 sleeved outside the lead screw 31. Multiple partitions 26 are provided and evenly distributed on the sleeve 24, corresponding one-to-one with the lead screw 31. Both ends of the lead screw 31 extend beyond the partitions 26 to facilitate subsequent installation of the transmission gear 33; Figure 8 As shown, in order to provide space for the sliding of the extrusion part 34, guide grooves are symmetrically opened on both outer walls of the partition plate 26, and the clamping plate 342 outside the threaded cylinder 341 passes through the guide grooves and can slide along the guide grooves, as shown. Figure 1 - Figure 3As shown, the two extrusion parts 34 can move synchronously with the movement of the sleeve 24. The extrusion parts 34 are sleeved on the outside of the lead screw 31, and the two are connected by threads. This allows the two extrusion parts 34 to move along the extension direction of the lead screw 31 when the lead screw 31 rotates. To position the workpiece, it needs to be clamped on both sides simultaneously; otherwise, the workpiece will keep moving to one side, making it impossible to effectively organize the workpiece. Therefore, we set two sets of threads on the outside of the lead screw 31, with opposite helical directions, and they are located on the outside of the lead screw 31 near the end. Then, the two extrusion parts 34 are connected to the two sets of threads respectively. When the lead screw 31 rotates, the two extrusion parts 34 open and close under the action of the threads, thus clamping and organizing the workpiece like a "clamp".

[0061] To avoid needing to install additional power equipment, we utilize the power generated during the movement of the belt 24 to control the rotation of the lead screw 31; firstly, we install a transmission gear 33 at each end of the lead screw 31, such as... Figure 3 and Figure 8 As shown, a movable rack 35, which meshes with the transmission gear 33, is installed on the edge of the conveyor belt 2. The movable rack 35 is positioned on the movement path of the transmission gear 33. When the transmission gear 33 at the end of the screw 31 slides past the movable rack 35, it drives the transmission gear 33 and the screw 31 connected to it to rotate synchronously. This utilizes the force generated during the movement of the belt 24 to rotate the screw 31. For reusability, a reset structure is needed. A spring-loaded torsion spring 32 is placed in the middle of the screw 31, connecting the screw 31 to the belt 24. As the screw 31 rotates, the torsion spring 32 continuously stores force. When the transmission gear 33 moves to a position not corresponding to the movable rack 35, the screw 31 rotates in the opposite direction under the torque of the torsion spring 32, thus achieving a reset motion. Figure 9 As shown.

[0062] During use, it was found that because the belt 24 is made of rubber to allow for proper bending, the lead screw 31 on it will deviate to some extent when passing the movable rack 35, causing the movable rack 35 to fail to accurately mesh with the transmission gear 33 on the lead screw 31. Therefore, we installed a set of limiting components 5 on each side of the conveyor belt 2. These components mainly consist of a strip-shaped limiting plate 51 and a connector 53 mounted on the conveyor belt 2. The connector 53 is mounted on the side of the conveyor belt 2, while the limiting plate 51 is mounted on top of the connector 53. Figure 2 and Figure 3As shown, the length of the limiting plate 51 is consistent with the length direction of the movable rack 35. The limiting component 5 is located above the conveyor belt 2 and corresponds to the transmission gear 33 at the end of the lead screw 31. When the lead screw 31 moves above the conveyor belt 2, the transmission gear 33 at the end of the lead screw 31 is located between the limiting plate 51 and the movable rack 35, thereby limiting the range of motion of the lead screw 31. At the same time, the edge of the limiting plate 51 is turned inward to form a pressing wall 52 with rounded chamfers. In this way, when the lead screw 31 moves between the limiting plate 51 and the movable rack 35, it can contact the lead screw 31 through the pressing wall 52, instead of the transmission gear 33 at the end of the lead screw 31 contacting the limiting plate 51, thus preventing the transmission gear 33 from hitting the limiting plate 51 and improving safety.

[0063] Based on the above, we made appropriate adjustments to the movable rack 35. Because in use, the number of rotations of the transmission gear 33 varies depending on the length of the movable rack 35, and consequently, the movement distance of the pressing component 34 also varies. Therefore, we designed the movable rack 35 as a base plate 351 aligned with the length of the conveyor belt 2. Several protruding pins 352 are evenly distributed on the top of the base plate 351. Using the protruding pins 352 as supports, sliding teeth 353 with grooves 354 are installed on top, allowing the sliding teeth 353 to slide on the protruding pins 352. When… When the sliding tooth 353 slides to the side of the bottom plate 351 near the sleeve 24, the sliding tooth 353 is located on the movement path of the lead screw 31 and can participate in the actuation of the transmission gear 33. Conversely, when the sliding tooth 353 slides to the side of the bottom plate 351 away from the sleeve 24, the sliding tooth 353 is not located on the movement path of the lead screw 31. Using this method, the number of sliding teeth 353 participating in the linkage can be adjusted as needed, thereby controlling the number of rotations of the transmission gear 33 when the sliding tooth 353 meshes with the transmission gear 33, thus changing the movement distance of the external pressing member 34 of the lead screw 31. Figure 11 As shown.

[0064] like Figure 10 The extrusion component 34 shown mainly includes a threaded cylinder 341 sleeved on the lead screw 31 and a clamping plate 342 sleeved on the outer side of the threaded cylinder 341. The clamping plate 342 is connected to the outer wall of the threaded cylinder 341 by a spring. Therefore, when the clamping plate 342 extrudes the workpiece, the deformation of the spring can prevent collisions caused by the inaccurate control of the number of rotations of the lead screw 31, thereby improving the stability of the device and reducing unnecessary risks.

[0065] In the specific implementation process, according to the distance that the extrusion part 34 needs to move, when the corresponding number of sliding teeth 353 are selected to push towards the side of the base plate 351 near the sleeve 24, such as Figure 6As shown, at this time, the sliding tooth 353 is located on the movement path of the lead screw 31, and can participate in the prying of the transmission gear 33. When the belt 24 drives the lead screw 31 to move, the transmission gear 33 at the end of the lead screw 31 passes through the movable rack 35. Since the transmission gear 33 can mesh with the movable rack 35, during the process of the transmission gear 33 passing through the movable rack 35, it will drive the transmission gear 33 and the lead screw 31 connected to the transmission gear 33 to rotate synchronously.

[0066] Since the extrusion component 34 is sleeved on the outside of the lead screw 31 and threadedly connected to the lead screw 31, the extrusion component 34 can be moved during the rotation of the lead screw 31. The lead screw 31 has two sets of threads on its outside, with opposite helical directions, and they are located on the outside of the lead screw 31 near the end. When the lead screw 31 rotates, the two extrusion components 34 open and close under the action of the threads, which can clamp and organize the workpiece like a "clamp".

[0067] Meanwhile, as the lead screw 31 rotates, the torsion spring 32 continuously stores force. When the transmission gear 33 moves to a position that does not correspond to the movable rack 35, the lead screw 31 will rotate in the opposite direction under the torque of the torsion spring 32, thereby achieving a reset motion for repeated use.

[0068] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An adjustable conveyor belt mechanism, installed at the discharge port of a push rod counter, characterized in that, This organization includes: A conveyor belt (2) for conveying workpieces, and a sleeve (24) is provided on the outside of the conveyor belt (2); The clamping assembly (3) is located outside the conveyor belt (2), and each end of the assembly is provided with an extruder (34). When the conveyor belt (2) moves, it drives the two extruders (34) to open and close. The clamping assembly (3) includes a lead screw (31) evenly distributed on the sleeve (24), and the extrusion member (34) is sleeved on the outside of the lead screw (31). The two are connected by threads. The end of the lead screw (31) is in contact with the edge of the conveyor belt (2). When the sleeve (24) moves relative to the conveyor belt (2), it drives the two extrusion members (34) to open and close along the extension direction of the lead screw (31).

2. The adjustable conveyor belt mechanism as described in claim 1, characterized in that: The screw (31) has two sets of threads on its exterior, with opposite spiral directions, located on the exterior of the screw (31) near the end. The two extrusion parts (34) are connected to the two sets of threads respectively. When the screw (31) rotates, the two extrusion parts (34) open and close under the action of the threads.

3. The adjustable conveyor belt mechanism as described in claim 1, characterized in that: The end of the lead screw (31) is provided with a transmission gear (33) and meshes with the movable rack (35) at the edge of the conveyor belt (2). When the transmission gear (33) at the end of the lead screw (31) slides along the movable rack (35), it drives the transmission gear (33) to rotate. A torsion spring (32) is provided at the middle position of the lead screw (31), and the lead screw (31) is connected to the sleeve (24) through the torsion spring (32) to continuously store force when the lead screw (31) rotates.

4. An adjustable conveyor belt mechanism as described in claim 3, characterized in that: A set of limiting components (5) is provided on each side of the conveyor belt (2). The limiting components (5) are located above the conveyor belt (2) and correspond to the transmission gear (33) at the end of the lead screw (31), which can limit the range of motion of the lead screw (31). The limiting component (5) includes a limiting plate (51), and the length of the limiting plate (51) is consistent with the length direction of the movable rack (35). When the lead screw (31) moves above the conveyor belt (2), the transmission gear (33) at the end of the lead screw (31) is located between the limiting plate (51) and the movable rack (35).

5. An adjustable conveyor belt mechanism as described in claim 3, characterized in that: The movable rack (35) includes a base plate (351) aligned with the length direction of the conveyor belt (2). A number of protruding pins (352) are evenly distributed on the top of the base plate (351), and sliding teeth (353) are installed on the protruding pins (352). When the sliding tooth (353) slides to the side of the bottom plate (351) near the sleeve (24), the sliding tooth (353) is located on the movement path of the lead screw (31); When the sliding tooth (353) slides to the side of the bottom plate (351) away from the sleeve (24), the sliding tooth (353) is not located on the movement path of the lead screw (31).

6. An adjustable conveyor belt mechanism as described in claim 2, characterized in that: The extrusion member (34) includes a threaded cylinder (341) sleeved on the lead screw (31), and a slidable clamping plate (342) is sleeved on the outside of the threaded cylinder (341), the clamping plate (342) being connected to the outer wall of the threaded cylinder (341) by a spring.

7. An adjustable conveyor belt mechanism as described in claim 6, characterized in that: The sleeve (24) has several partitions (26) evenly distributed on its exterior, and the partitions (26) correspond one-to-one with the lead screw (31). The lead screw (31) is inserted into the partition (26), and both ends of the lead screw (31) extend out of the partition (26). The partition (26) has guide grooves on its two outer walls, and the clamping plate (342) outside the threaded cylinder (341) passes through the guide grooves and can slide along the guide grooves.

8. An adjustable conveyor belt mechanism as described in claim 3, characterized in that: The conveyor belt (2) includes a plate-shaped support plate (21), and a side plate (22) is installed on each side of the support plate (21). Two side rollers (23) are arranged between the two side plates (22), and the two side rollers (23) are located on the front and rear sides of the support plate (21), respectively. The sleeve (24) is sleeved on the outside of the two side rollers (23) and on the outside of the support plate (21); The movable rack (35) is mounted on the side plate (22).

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