Material box assembly, conveying device and solar cell production equipment

Abstract

The utility model relates to material box technical field, concretely provides a material box subassembly, conveying device and solar cell production equipment. The utility model discloses material box subassembly includes: material box, baffle and brake mechanism, material box bottom is provided with rotatable wheel transmission link, and wheel transmission link fixedly sets up gyro wheel, brake mechanism includes brake pawl, the gear and spring of adaptation, and one end of brake pawl is rotatablely connected with baffle, and the other end of brake pawl is rotatablely connected with material box, gear is sleeved on wheel transmission link, spring fixing seat is set up on material box, and spring is arranged between spring fixing seat and brake pawl. Baffle is pushed back by the positioning baffle, and baffle drives brake pawl to rotate back and remove the gear groove, so that the brake of wheel transmission link is removed, and gyro wheel rolls on the belt surface, and the friction coefficient of rolling friction is reduced greatly, and the abrasion and loss of belt surface are reduced significantly, and when baffle is not blocked, brake opens, and gyro wheel and belt surface slide friction.

Description

Technical Field

[0001] This utility model relates to the field of material box technology, specifically providing a material box assembly, a conveying device, and solar cell production equipment. Background Technology

[0002] On an automated packaging line for solar cells, solar cells are placed into boxes and transported by a continuous conveyor belt. When a box reaches a designated station, the front box is stopped by a pneumatic stop or mechanical barrier. However, subsequent boxes must continue to be conveyed due to production line rhythm requirements, necessitating continuous operation of the conveyor belt. During this process, relative sliding friction occurs between the bottom of the blocked front box and the surface of the conveyor belt. Especially in multi-station continuous blocking scenarios, a single box may endure continuous sliding friction for tens of seconds to several minutes.

[0003] Because solar cell production lines are long and run at high speeds, this high-frequency, long-term friction causes significant physical wear, increases the roughness of the belt surface, and gradually leads to cracks and peeling. The plowing action of the bottom of the material box on the belt further aggravates wear and also reduces the thickness of the belt.

[0004] The aforementioned problems not only lead to a surge in belt replacement costs but also cause economic losses due to downtime for maintenance, impacting production line efficiency. Furthermore, rubber particles generated from belt shedding may adhere to the surface of solar cells or the inside of the material boxes, posing a risk of foreign object contamination and affecting product yield. Simultaneously, the reduced precision of the worn belt drive may trigger secondary problems such as material box jamming and stacking misalignment, further exacerbating equipment wear.

[0005] Accordingly, there is a need in the art for a new material box assembly to solve the problem of continuous sliding friction between the existing material box and the belt when the material box is blocked, which leads to accelerated belt wear. Utility Model Content

[0006] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that the existing material box causes continuous sliding friction between itself and the belt when it is blocked, which leads to increased belt wear.

[0007] In a first aspect, the present invention provides a material box assembly, the material box assembly comprising: a material box, a baffle and a braking mechanism;

[0008] The bottom of the material box is provided with a rotatable wheel drive rod, and the wheel drive rod is fixedly provided with rollers;

[0009] The braking mechanism includes a brake pawl, a gear adapted to the brake pawl, and an elastic element. One end of the brake pawl is rotatably connected to the baffle, and the other end of the brake pawl is rotatably connected to the material box. The gear is sleeved on the wheel drive rod.

[0010] The material box is provided with a spring fixing seat, and the elastic element is disposed between the spring fixing seat and the brake pawl.

[0011] In the optional technical solution of the above-mentioned material box assembly, the braking mechanism further includes a connecting member, and the braking pawl and the baffle are rotatably connected through the connecting member.

[0012] In the optional technical solution of the above-mentioned material box assembly, the connecting member includes an arc-shaped connecting block with the opening facing upward and a first connecting shaft, and the arc-shaped connecting block and the brake pawl are rotatably connected through the first connecting shaft.

[0013] In the optional technical solution of the above-mentioned material box assembly, the connecting member includes two arc-shaped connecting blocks, and the first connecting shaft is connected between the two arc-shaped connecting blocks.

[0014] In the optional technical solutions of the above-mentioned material box assembly, the braking pawl has an arc-shaped structure with the opening facing downwards.

[0015] In the optional technical solution of the above-mentioned material box assembly, the material box assembly includes a first connecting rod, and the baffle and the connecting member are rotatably connected through the first connecting rod.

[0016] In the optional technical solution of the above-mentioned material box assembly, a brake pawl fixing seat is provided at the bottom of the material box, and the brake pawl is rotatably connected to the brake pawl fixing seat.

[0017] In the optional technical solution of the above-mentioned material box assembly, the wheel drive rod 4 includes a first wheel drive rod and a second wheel drive rod, and the two braking mechanisms are respectively disposed on the first wheel drive rod and the second wheel drive rod. The material box assembly also includes a second connecting rod, which is connected to the first connecting rod. The brake pawl on the second wheel drive rod is rotatably connected to the second connecting rod through the connecting member; and / or

[0018] The first connecting rod includes a first horizontal bar, a first vertical bar, and a vertical bar. The first vertical bar and the vertical bar are connected to form a Z-shaped bar structure. The first horizontal bar is connected to one end of the Z-shaped bar structure. The connecting member is rotatably connected to the first horizontal bar.

[0019] In a second aspect, the present invention also proposes a conveying device, which includes the material box assembly described in any of the above technical solutions.

[0020] In a second aspect, the present invention also proposes a solar cell production equipment, which includes the material box assembly described in any of the above technical solutions.

[0021] Those skilled in the art will understand that the material box assembly of this utility model includes: a material box, a baffle, and a braking mechanism; a rotatable wheel drive rod is provided at the bottom of the material box, and a roller is fixedly provided on the wheel drive rod; the braking mechanism includes a brake pawl, a gear adapted to the brake pawl, and an elastic element, one end of the brake pawl is rotatably connected to the baffle, and the other end of the brake pawl is rotatably connected to the material box; the gear is sleeved on the wheel drive rod; a spring fixing seat is provided on the material box, and the elastic element is provided between the spring fixing seat and the brake pawl.

[0022] When the material box reaches its designated station on the production line, components mounted on the conveyor belt (such as positioning blocks) will contact the baffle and generate resistance. During this process, the baffle is pushed backward by the positioning blocks, and simultaneously, the baffle drives the brake pawl to rotate backward. Its end gradually moves out of the gear teeth, releasing the braking constraint on the wheel drive rod, allowing it to rotate freely. During the rotation of the brake pawl, its spring is compressed, causing elastic deformation and storing elastic potential energy. At this time, the material box remains stationary due to the obstruction of the baffle, while the conveyor belt continues to run, causing the rollers to roll on the belt surface. Compared to traditional sliding friction, the coefficient of friction in the rolling friction mode is significantly reduced, significantly reducing wear and tear on the belt surface and effectively extending the service life of the conveyor belt.

[0023] When the baffle disengages from the positioning block and the material box is unobstructed, the elastic potential energy stored in the spring is released. Under the action of the rebound force, it drives the brake pawl to rotate in the opposite direction and re-engage into the gear teeth to re-limit the rotation of the wheel drive rod. At this time, the contact state between the roller and the conveyor belt changes from rolling friction to sliding friction. The higher coefficient of sliding friction provides stronger friction, ensuring that the material box is firmly attached to the conveyor belt and avoiding displacement due to inertia or vibration during subsequent transportation, thus achieving stable and efficient transportation of solar cells. Attached Figure Description

[0024] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a three-dimensional structural diagram of the material box assembly of this utility model;

[0026] Figure 2 This is a cross-sectional schematic diagram of the material box assembly of this utility model;

[0027] Figure 3This is a structural diagram of the material box assembly of this utility model after the material box is removed;

[0028] Figure 4 This is a cross-sectional structural diagram of the braking mechanism (with the brake pawl fixing seat removed) of this utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of the braking mechanism of this utility model.

[0030] List of reference numerals in the attached diagram:

[0031] 1. Material box; 21. Baffle; 22. Spring retainer; 23. Brake pawl retainer; 231. Column; 232. Second connecting shaft; 24. First connecting rod; 241. First horizontal bar; 242. First vertical bar; 243. Vertical bar; 25. Second connecting rod; 251. Second horizontal bar; 252. Second vertical bar;

[0032] 31. Brake pawl; 32. Gear; 33. Spring; 34. Connecting component; 341. Arc-shaped connecting block; 342. First connecting shaft;

[0033] 4. Wheel drive rod; 41. First wheel drive rod; 42. Second wheel drive rod; 43. Roller. Detailed Implementation

[0034] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although this application is described in conjunction with solar cell production equipment, this is not limiting; the material box assembly of the present invention can be applied to conveying devices in other fields.

[0035] It should be noted that in the description of this utility model, the terms "upper," "lower," "front," "rear," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] To address the problem of continuous sliding friction between the material box and the belt when the material box is obstructed, which leads to accelerated belt wear, this utility model provides a material box assembly.

[0038] Reference Figures 1 to 4 The material box assembly includes a material box 1, a baffle 21, and a braking mechanism. The material box 1 serves as a component that carries solar cells, and a rotatable wheel drive rod 4 is provided at the bottom of the material box 1. Rollers 43 are fixedly mounted on the wheel drive rod 4.

[0039] The braking mechanism includes a brake pawl 31, a matching gear 32, and a spring 33. One end of the brake pawl 31 is rotatably connected to the baffle 21, and the other end of the brake pawl 31 is rotatably connected to the material box 1. The gear 32 is sleeved on the wheel drive rod 4. A spring fixing seat 22 is provided at the bottom of the material box 1, and the spring 33 is disposed between the spring fixing seat 22 and the brake pawl 31.

[0040] When the material box 1 moves to the designated station along the production line, the positioning block installed on the conveyor belt will contact the baffle 21 and generate resistance. During this process, the baffle 21 is pushed backward by the positioning block, and at the same time, the baffle 21 drives the brake pawl 31 to rotate backward. Simultaneously, its end gradually moves out of the tooth groove of the gear 32, releasing the braking constraint of the wheel drive rod 4, allowing it to rotate freely. During the rotation of the brake pawl 31, its compressed spring 33 undergoes elastic deformation and stores elastic potential energy. At this time, the material box 1 remains stationary due to the obstruction of the baffle 21, while the conveyor belt continues to run, driving the roller 43 to roll on the belt surface. Compared to traditional sliding friction, the coefficient of friction in the rolling friction mode is significantly reduced, significantly reducing wear and tear on the belt surface and effectively extending the service life of the conveyor belt.

[0041] When the baffle 21 disengages from the positioning block and the material box is unblocked, the elastic potential energy stored in the spring 33 is released. Under the action of the rebound force, the brake pawl 31 rotates in the opposite direction and re-engages into the tooth groove of the gear 32, thereby re-limiting the rotation of the wheel drive rod 4. At this time, the contact state between the roller 43 and the conveyor belt changes from rolling friction to sliding friction. The higher coefficient of sliding friction provides stronger friction, ensuring that the material box 1 is firmly attached to the conveyor belt, avoiding displacement due to inertia or vibration during subsequent transportation, and achieving stable and efficient transportation of solar cells.

[0042] In one possible implementation, continue to refer to Figures 1-4 The material box assembly adopts a dual-drive rod, dual-brake structure. Specifically, the material box assembly includes a material box 1, a braking mechanism, and a baffle 21. A first wheel drive rod 41 and a second wheel drive rod 42 are arranged in a front-to-back configuration at the bottom of the material box 1 along the conveying direction. The first wheel drive rod 41 is located at the front of the bottom of the material box 1, and the second wheel drive rod 42 is located at the rear of the bottom of the material box 1. Rollers 43 are respectively provided at both ends of the first wheel drive rod 41 and the second wheel drive rod 42. The rollers 43 contact the conveyor belt, enabling the material box assembly to switch friction modes under different operating conditions.

[0043] Two braking mechanisms are respectively mounted on the first wheel drive rod 41 and the second wheel drive rod 42. Each braking mechanism includes a brake pawl 31, a matching gear 32, a spring 33, and a connecting member 34. The gear 32 is fixedly sleeved on the first wheel drive rod 41 and the second wheel drive rod 42 by means of interference fit or key connection, and can rotate synchronously with the wheel drive rod.

[0044] The baffle 21 acts as a linkage triggering component, and is linked with two sets of braking mechanisms through a connecting rod component. When the baffle 21 is blocked by the positioning block and subjected to a backward force, it drives the two sets of braking mechanisms to open the brakes simultaneously.

[0045] Brake pawl fixing seats 23 are respectively provided at the front and rear positions of the bottom of the material box 1 to support the rotational connection of the brake pawl 31. Spring fixing seats 22 are respectively provided at the front and rear positions of the bottom of the material box 1 to serve as the fixing ends of the spring 33.

[0046] One end of the brake pawl 31 is rotatably connected to the connecting member 34, and the other end of the brake pawl 31 is rotatably connected to the brake pawl fixing seat 23. One end of the spring 33 is connected to the spring fixing seat 22, and the other end is hooked onto the brake pawl 31. In the initial state, this ensures that the end of the brake pawl 31 is tightly engaged with the gear 32, thereby achieving brake locking of the wheel drive rod.

[0047] Furthermore, the linkage component includes a first linkage 24, one end of which is connected to the baffle 21, and the other end is rotatably connected to the front connecting component 34.

[0048] The linkage component includes a second linkage 25, one end of which is connected to the first linkage 24, and the other end is rotatably connected to the rear connecting component 34.

[0049] Furthermore, then refer to Figure 4 The connecting component 34 includes two upward-facing arc-shaped connecting blocks 341 and a first connecting shaft 342. Each arc-shaped connecting block 341 has a through hole at both ends. One through hole is rotatably fitted with the first connecting shaft 342, allowing the two arc-shaped connecting blocks 341 to rotate around the first connecting shaft 342. The other through hole is rotatably connected to the first connecting rod 24. The brake pawl 31 is fitted onto the first connecting shaft 342 through a shaft hole and maintains an axial clearance fit with the arc-shaped connecting blocks 341, ensuring relatively flexible rotation of each component during transmission. This structural design, through the coordinated action of the two arc-shaped blocks, effectively disperses lateral forces during braking, making the rotation of the brake pawl 31 smoother. It also improves the adaptability of the connecting component 34 to forces in different directions, avoiding component wear or jamming due to uneven force distribution, and significantly enhancing the reliability and service life of the braking mechanism.

[0050] Furthermore, the brake pawl 31 has a downward-facing arc-shaped structure. Compared to right-angle or straight-line pawls, the arc-shaped structure allows the contact point to slide along the arc during engagement or disengagement, avoiding rigid collisions, reducing vibration and noise, and is especially suitable for high-frequency start-stop or high-speed operation scenarios. The radius of curvature of the arc-shaped structure can optimize stress distribution, reduce the wear rate of the pawl tip (the tip is the main stress point during braking), extend the service life of critical components, and reduce maintenance frequency.

[0051] Furthermore, the brake pawl 31 is rotatably connected to the baffle 21 via the connecting member 34. This double-rotation connection design, with the connecting member 34 acting as a bridge, ensures that when the baffle 21 is blocked by the positioning block, the connecting member 34 can accurately and flexibly transmit the force to the brake pawl 31, driving it to rotate, regardless of any deviation in the direction of the force. This ensures timely response of the braking mechanism and avoids braking delays or failures due to poor force transmission. This rotatable connection also grants the brake pawl 31 and the baffle 21 relatively independent degrees of freedom of movement. During the operation of the hopper assembly, even if the position of the components changes slightly due to manufacturing errors, assembly deviations, or external vibrations, the connecting member 34 can adaptively adjust itself through rotation, effectively reducing the risk of motion interference between components and ensuring the smooth operation of the braking system. During frequent braking and unlocking processes, this structure can evenly distribute the forces from the baffle 21 and the brake pawl 31, avoiding localized stress concentration, reducing wear and damage to components, enhancing the stability and reliability of the entire braking system, and extending the service life of the hopper assembly.

[0052] When the material box 1 moves to the designated station along the production line, the positioning block installed on the conveyor belt will contact the baffle 21 and generate resistance. During this process, the baffle 21 is pushed backward by the positioning block, and at the same time, the baffle 21 drives the front and rear brake pawls 31 to rotate backward through the first link 24 and the second link 25. Simultaneously, their ends gradually move out of the tooth grooves of the gear 32, releasing the braking constraint of the front and rear wheel drive rods 4, allowing them to rotate freely. During the rotation of the brake pawl 31, its compressed spring 33 undergoes elastic deformation and stores elastic potential energy. At this time, the material box 1 remains stationary due to the obstruction of the baffle 21, while the conveyor belt continues to run, driving the roller 43 to roll on the belt surface. Compared with traditional sliding friction, the coefficient of friction in the rolling friction mode is significantly reduced, significantly reducing wear and loss on the belt surface and effectively extending the service life of the conveyor belt.

[0053] When the baffle 21 disengages from the positioning block and the material box is unblocked, the elastic potential energy stored in the front and rear springs 33 is released. Under the action of the rebound force, the front and rear brake pawls 31 rotate in the opposite direction and re-engage into the tooth grooves of the gear 32 to re-limit the rotation of the two wheel drive rods 4. At this time, the contact state between the roller 43 and the conveyor belt changes from rolling friction to sliding friction. The higher coefficient of sliding friction can provide stronger friction, ensuring that the material box 1 is firmly attached to the conveyor belt and avoiding displacement due to inertia or vibration during subsequent transportation, thus achieving stable and efficient transportation of solar cells.

[0054] As one possible implementation method, refer to Figure 3The first connecting rod 24 includes a first horizontal rod 241, a first vertical rod 242, and a vertical rod 243. The first vertical rod 242 and the vertical rod 243 are connected to form multiple Z-shaped rod structures. The first horizontal rod 241 is connected to one end of the Z-shaped rod structure, and the other end of the Z-shaped rod structure is connected to the baffle 21. The insertion holes at one end of the two arc-shaped connecting blocks 341 are fitted onto the first horizontal rod 241 of the first connecting rod 24, so that the arc-shaped connecting blocks 352 can rotate around the first horizontal rod 241. The Z-shaped rod structure is formed by the alternating connection of the first vertical rod 242 and the vertical rod 243. This zigzag design can efficiently convert the linear thrust on the baffle 21 into torque that drives the brake pawl 31 to rotate through multiple direction conversions. The Z-shaped rod structure makes the installation position of the baffle 21 significantly higher than that of the brake pawl 31, ensuring that it can effectively contact the positioning block on the conveyor belt and avoid interference with the surface of the conveyor belt.

[0055] As one possible implementation method, continue to refer to Figure 3 The second link 25 includes a second crossbar 251 and a second longitudinal bar 252. The second crossbar 251 connects the two second longitudinal bars 252, and one end of the second longitudinal bar 252 connects to both ends of the first crossbar 241. The rear connecting member 34 is rotatably connected to the second crossbar 251. The vertical connection between the second longitudinal bar 252 and the second crossbar 251 forms a stable frame structure with higher bending stiffness compared to a single-bar design. When transmitting large driving forces (such as in rapid braking scenarios), this structure can effectively reduce deformation. In addition, it allows the driving force from the first crossbar 241 to be evenly distributed to the rear connecting member 34, avoiding stress concentration caused by single-point force application, ensuring that the rear braking mechanism responds synchronously with the front, and improving the coordination of the dual braking system.

[0056] As one possible implementation method, refer to Figure 4 The brake pawl mounting base 23 includes two columns 231 and a second connecting shaft 232 fixedly connected between the two columns 231. The end of the brake pawl 31 is rotatably connected to the second connecting shaft 232. The two columns 231 form a symmetrical support structure, which, together with the second connecting shaft 232, constitutes a stable "gate"-shaped frame. This structure can evenly distribute the radial and axial forces generated by the brake pawl 31 during rotation, avoiding structural deformation or damage caused by single-point force, ensuring that the brake pawl 31 remains stable during frequent braking and reset, and enhancing the reliability of the entire braking system.

[0057] As described in the first paragraph of this section, the above embodiments are merely used to illustrate the principle of this utility model and are not intended to limit the scope of protection of this utility model. Without departing from the principle of this utility model, those skilled in the art can adjust the above structure so that this utility model can be applied to more specific application scenarios.

[0058] For example, as an alternative implementation, the connecting member 34 includes only an upward-facing arc-shaped connecting block 341 and a first connecting shaft 342. The first connecting shaft 342 passes through corresponding holes in the arc-shaped connecting block 352 and the brake pawl 31, enabling a rotatable connection between the two. Alternatively, the arc-shaped connecting block 341 can be a non-arc structure, such as a rectangular block. Utilizing the regular shape and ease of processing of the rectangular block, rotatable connection with the brake pawl 31 is achieved by opening shaft holes at both ends to engage with the first connecting shaft 342. Alternatively, a linkage structure can be used, with a rigid linkage as the connecting carrier. Hinge points are set at both ends of the linkage, connecting to the brake pawl 31 and the first linkage 24 respectively, thereby achieving effective force transmission. These all do not deviate from the principle of this utility model and therefore fall within the protection scope of this utility model.

[0059] The brake pawl fixing seat 23 is not limited to a two-column structure. For example, as an alternative implementation, the brake pawl fixing seat 23 can also be designed as a U-shaped groove plate with shaft holes on both sides of the U-shaped groove plate. The second connecting shaft 232 passes through the shaft holes on both sides and is rotatably connected to the brake pawl 31. These designs do not deviate from the principle of this utility model and therefore fall within the protection scope of this utility model.

[0060] As an alternative implementation, the spring can also be replaced with other elastic components such as rubber blocks or silicone blocks that have equivalent elastic deformation capabilities. These do not deviate from the principle of this utility model and therefore all fall within the protection scope of this utility model.

[0061] As an alternative implementation, the first connecting rod 24 is omitted, and instead, the baffle 21 is directly rotatably connected to the connecting member 34 via a pin. These modifications do not deviate from the principle of this utility model and therefore fall within its protection scope.

[0062] The shape of the first link 24 is not limited to a Z-shape. As an alternative implementation, the first link 24 can also be an L-shape composed of a first horizontal bar 241 and multiple first vertical bars 243, or the structure can be further simplified by retaining only the first horizontal bar 241, minimizing the space occupied by components while ensuring basic functions. These all do not deviate from the principle of this utility model, and therefore all fall within the protection scope of this utility model.

[0063] The shape of the second link 25 can also be set as needed. For example, as an alternative implementation, the second link 25 can also be a T-shaped structure composed of a second crossbar 251 and a first longitudinal bar 252. These do not deviate from the principle of this utility model and therefore fall within the protection scope of this utility model.

[0064] The shape of the brake pawl 31 is not limited to an arc shape; it can also be non-arc. As an alternative implementation, the brake pawl 31 can also be rectangular, elliptical, or trapezoidal, etc. These do not deviate from the principle of this utility model and therefore all fall within the protection scope of this utility model.

[0065] The number of wheel drive rods 4 can be adjusted according to the load and operational stability requirements of the material box 1. As an alternative implementation, each wheel drive rod 4 can be equipped with only one, three, four, or even more rollers 43. Furthermore, the number of wheel drive rods 4 on the material box 1 is not limited to two; it can also be one, three, four, five, or more. Braking mechanisms are installed on all wheel drive rods 4 that come into contact with the conveyor belt. These modifications do not deviate from the principle of this utility model and therefore fall within the protection scope of this utility model.

[0066] This utility model also provides a conveying device having the material box assembly described in any of the above embodiments.

[0067] This utility model also provides a solar cell production equipment, which has the material box assembly described in any of the above embodiments.

[0068] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A material box assembly, characterized in that, include: Material box (1), baffle (21) and braking mechanism; The bottom of the material box (1) is provided with a rotatable wheel drive rod (4), and the wheel drive rod (4) is fixedly provided with a roller (43); The braking mechanism includes a brake pawl (31), a gear (32) adapted to the brake pawl (31), and an elastic element. One end of the brake pawl (31) is rotatably connected to the baffle (21), and the other end of the brake pawl (31) is rotatably connected to the material box (1). The gear (32) is sleeved on the wheel drive rod (4). The material box (1) is provided with a spring fixing seat (22), and the elastic element is disposed between the spring fixing seat (22) and the brake pawl (31).

2. The material box assembly according to claim 1, characterized in that, The braking mechanism further includes a connecting member (34), through which the braking pawl (31) and the baffle (21) are rotatably connected.

3. The material box (1) assembly according to claim 2, characterized in that, The connecting member (34) includes an arc-shaped connecting block (341) with the opening facing upward and a first connecting shaft (342). The arc-shaped connecting block (341) and the brake pawl (31) are rotatably connected through the first connecting shaft (342).

4. The material box (1) assembly according to claim 3, characterized in that, The connecting member (34) includes two arc-shaped connecting blocks (341), and the first connecting shaft (342) is connected between the two arc-shaped connecting blocks (341).

5. The material box assembly according to claim 2, characterized in that, The braking pawl (31) has an arc-shaped structure with the opening facing downwards.

6. The material box assembly according to claim 2, characterized in that, The material box assembly includes a first connecting rod (24), and the baffle (21) and the connecting member (34) are rotatably connected through the first connecting rod (24).

7. The material box assembly according to claim 1, characterized in that, The bottom of the material box (1) is provided with a brake pawl fixing seat (23), and the brake pawl (31) is rotatably connected to the brake pawl fixing seat (23).

8. The material box assembly according to claim 6, characterized in that, The wheel drive rod (4) includes a first wheel drive rod (41) and a second wheel drive rod (42). The two braking mechanisms are respectively disposed on the first wheel drive rod (41) and the second wheel drive rod (42). The material box assembly also includes a second connecting rod (25), which is connected to the first connecting rod (24). The brake pawl (31) on the second wheel drive rod (42) is rotatably connected to the second connecting rod (25) through the connecting member (34); and / or, The first connecting rod (24) includes a first horizontal bar (241), a first vertical bar (242) and a vertical bar (243). The first vertical bar (242) and the vertical bar (243) are connected to form a Z-shaped bar structure. The first horizontal bar (241) is connected to one end of the Z-shaped bar structure. The connecting member (34) is rotatably connected to the first horizontal bar (241).

9. A conveying device, characterized in that, The conveying device includes the hopper assembly as described in any one of claims 1-8.

10. A solar cell manufacturing apparatus, characterized in that, The solar cell production equipment includes the cassette assembly as described in any one of claims 1-8.

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