Belt-driven compact shelving manual driving device with novel brake mechanism

Abstract

The utility model discloses a belt drive compact shelving manual driving device with a novel braking mechanism, a belt wheel braking mechanism is arranged above a transition belt wheel, the belt wheel braking mechanism comprises a support and a sliding unit, the support is fixedly connected with an integrated board, the sliding unit is connected with the support in a sliding mode, and the sliding unit is connected with the transition belt wheel in a sliding mode. The sliding unit spans the two ends of the transition belt wheel, one end of the sliding unit is fixedly connected with an electric push rod, the electric push rod is slidably connected with the support, the driving end of the electric push rod is fixedly connected with a first friction plate, and the other end of the sliding unit is fixedly connected with a second friction plate. The brake device is ingenious in structure, the first friction plate and the second friction plate clamp or loosen the transition belt wheel through the telescopic action of the electric push rod, and therefore the brake function or the brake release function of the transition belt wheel is effectively achieved. The braking force of the braking mechanism is not radially acted on the wheel groove of the transition belt wheel, but acts on the end faces of the two sides of the transition belt wheel, and the belt wheel groove and the belt wheel shaft cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of compact shelves, in particular to a manual driving device of a belt-driven compact shelf with a novel braking mechanism. Background Art

[0002] Compact shelf cabinets are usually composed of several compact shelves. The compact shelves are installed on ground rails and are provided with manual driving devices. The compact shelves can move back and forth along the rails through the manual driving devices. Most of the existing manual driving devices of compact shelves are chain drive structures or transmission gear meshing structures. The chain drive structure has the advantage of high load-bearing capacity, but also has the following defects: poor transmission smoothness, easy to generate additional dynamic loads, vibrations, impacts and noises during operation; relatively high manufacturing and operation costs, the chain needs to be lubricated regularly, otherwise the chain is prone to wear and corrosion; the chain needs to be regularly inspected and the chain tightness needs to be adjusted, otherwise it is easy to fall off or form an idling (commonly known as dropping the chain) after a certain period of use; the gear meshing transmission structure has the advantage of high transmission accuracy, but also has the following defects: the accuracy requirements for gear manufacturing and installation are relatively high, resulting in higher costs, and the manufacturing process is complex, inconvenient for maintenance and repair, and poor adaptability to the operating environment; large operating noise, poor speed change adaptability, and the overall manual driving device is heavy and large in volume. The belt drive has the characteristics of smooth transmission operation, low noise, no need for lubrication, and simple maintenance. Therefore, replacing the chain drive in the manual driving device of the compact shelf with a belt drive is one of the development directions of the compact shelf drive. At present, belt drive structures for compact shelves have appeared on the market. However, the existing locking and braking device on the integrated shelf uses a locking rod with a conical head to be stuck in the chain tooth groove of the transition sprocket to achieve the purpose of braking the integrated shelf. If the existing locking and braking device is used to lock the transition pulley, since the pulley usually has no tooth-shaped structure, even if there is a very shallow tooth groove, the locking rod cannot hold the pulley and cannot effectively brake the pulley. If you want to rely on the tail of the locking rod to radially press against the pulley groove to achieve the purpose of braking, on the one hand, this pressing force needs to be large enough, and it is not very realistic to achieve this force only by manually rotating the braking rod and the cam. On the other hand, too large a pressing force will damage the pulley groove and also apply a large pressure to the pulley shaft for a long time, deforming the pulley shaft and affecting normal use. Therefore, this kind of locking and braking device is not suitable for the belt drive structure, so the structure of the locking and braking device of the compact shelf needs to be optimized. Content of the Utility Model

[0003] The purpose of the utility model is to provide a manual driving device of a belt-driven compact shelf with a novel braking mechanism, optimize the structure of the locking and braking device of the integrated shelf, and be able to effectively brake the transition pulley.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A manual driving device for a belt-driven compact rack with a new type of braking mechanism, comprising an integrated board and a driving pulley, a tension pulley, a transition pulley and an output pulley which are rotatably arranged on the integrated board in sequence from top to bottom. The driving pulley is fixedly connected with a crank. The driving pulley is connected with the transition pulley through a first synchronous belt across the tension pulley. The transition pulley is connected with the output pulley through a second synchronous belt. A pulley braking mechanism is arranged above the transition pulley. The pulley braking mechanism comprises a bracket and a sliding unit. The bracket is fixedly connected with the integrated board. The sliding unit is slidably connected with the bracket. The sliding unit straddles both ends of the transition pulley. One end of the sliding unit is fixedly connected with an electric push rod. The electric push rod is slidably connected with the bracket. The driving end of the electric push rod is fixedly connected with a first friction plate. The other end of the sliding unit is fixedly connected with a second friction plate. When the electric push rod extends, it pushes the first friction plate and the second friction plate to clamp the transition pulley. An elastic unit is arranged between the bracket and the sliding unit. When the electric push rod contracts, the elastic unit springs the first friction plate and the second friction plate to both sides.

[0006] Further, the bracket comprises a cross plate and a connecting plate. The connecting plate is fixedly connected with the integrated board through bolts. The cross plate is vertically and fixedly connected with the connecting plate. A rib plate is fixedly arranged between the cross plate and the connecting plate. Two parallel vertical plates are fixedly connected below the end of the cross plate. A support plate is fixedly connected to the end of the vertical plate. A sliding hole is formed in the middle of the vertical plate, and a sliding groove is formed at the bottom of the vertical plate.

[0007] Further, the sliding unit comprises a sliding rod. The diameter of the sliding rod matches the aperture of the sliding hole. One end of the sliding rod is detachably fixedly connected with a first push plate, and the other end is fixedly connected with a second push plate. A first mounting seat is fixedly connected to the bottom of the first push plate. A second friction plate mounting plate is fixedly connected to the bottom of the second push plate through a connecting block. The second friction plate is fixedly connected with the second friction plate mounting plate. The sliding rod is sleeved in the sliding hole and slidably connected with the bracket.

[0008] Further, the main body of the electric push rod is sleeved in the sliding groove and slidably connected with the bracket. The fixed end of the electric push rod is sleeved in the first mounting seat and fixedly connected with the first mounting seat through bolts. The driving end of the electric push rod is sleeved with a second mounting seat and fixedly connected with the second mounting seat through bolts. The second mounting seat is fixedly connected with a first friction plate mounting plate. The first friction plate is fixedly connected with the first friction plate mounting plate.

[0009] Further, the elastic unit includes a spring seat, a compression spring, a fixing plate and a short shaft. The fixing plate is fixedly arranged in the middle of the sliding rod. The short shaft is fixedly connected to the fixing plate and is located below the sliding rod. The spring seat is fixedly arranged in the middle of the vertical plate adjacent to the fixing plate and the opening faces the short shaft. The spring seat and the short shaft are coaxial. The compression spring is located in the spring seat and sleeved on the short shaft. Both ends of the compression spring closely abut against the vertical plate and the fixing plate respectively.

[0010] Further, a limiting rod is fixedly arranged in the middle of the outermost vertical plate of the bracket, and the limiting rod faces outward. When the first friction plate and the second friction plate clamp the transition pulley, the distance between the limiting rod and the first push plate is controlled within 2 - 4 mm.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The structure of the present utility model is ingenious. It is provided with a belt pulley braking mechanism. The belt pulley braking mechanism includes a bracket and a sliding unit. The bracket is fixedly connected to the integrated board. The sliding unit is slidably connected to the bracket. One end of the sliding unit is fixedly connected with a first friction plate through an electric push rod, and the other end is fixedly connected with a second friction plate. The sliding unit straddles the transition pulley and makes the first friction plate and the second friction plate located at both ends of the transition pulley. By the telescopic movement of the electric push rod, the first friction plate and the second friction plate clamp or release the transition pulley, so as to effectively realize the braking or release of the braking function of the transition pulley. The braking force of the braking mechanism does not act radially on the pulley groove of the transition pulley, but acts on both end faces of the transition pulley, and will not cause damage to the pulley groove and the pulley shaft. Description of the Drawings

[0013] Figure 1 is the front view of the present utility model;

[0014] Figure 2 is Figure 1 the A - A cross - sectional view in

[0015] Figure 3 the schematic diagram of the belt pulley braking mechanism;

[0016] Figure 4 is the comparison diagram of the braking and release states of the transition pulley;

[0017] Figure 5 is the schematic diagram of the bracket;

[0018] Figure 6 is the schematic diagram of the sliding unit;

[0019] Figure 7 is the assembly schematic diagram of the tension pulley;

[0020] Figure 8 is the assembly schematic diagram of the transition pulley;

[0021] Figure 9 It is a schematic diagram of the output pulley assembly;

[0022] Figure 10 It is a schematic diagram of the tension bearing assembly;

[0023] Figure 11 It is a schematic diagram of the existing transition sprocket braking mechanism;

[0024] In the figure: 1 - integrated board, 2 - rocker, 201 - straight shaft, 3 - driving pulley, 4 - tension pulley, 401 - first shaft, 402 - first bearing, 403 - first retaining ring, 5 - pulley braking mechanism, 501 - bracket, 502 - cross plate, 503 - connecting plate, 504 - rib plate, 505 - vertical plate, 506 - support plate, 507 - spring seat, 508 - limiting rod, 509 - sliding hole, 510 - sliding groove, 511 - sliding unit, 512 - sliding rod, 513 - first push plate, 514 - first mounting seat, 515 - second push plate, 516 - connecting block, 517 - second friction plate mounting plate, 518 - fixing plate, 519 - short shaft, 520 - compression spring, 521 - electric push rod, 522 - second mounting seat, 523 - first friction plate mounting plate, 524 - first friction plate, 525 - second friction plate, 6 - transition pulley, 601 - first large pulley, 602 - first small pulley, 603 - second shaft, 604 - second bearing, 605 - second retaining ring, 7 - output pulley, 701 - second large pulley, 702 - second small pulley, 703 - third shaft, 704 - third bearing, 705 - third retaining ring, 8 - walking pulley, 9 - mobile rack walking device, 10 - first synchronous belt, 11 - tension bearing, 1101 - fourth shaft, 1102 - fourth retaining ring, 12 - second synchronous belt, 13 - third synchronous belt, 14 - transition sprocket, 15 - locking braking device, 1501 - locking rod, 1502 - return spring, 1503 - cam, 1504 - braking rod. Specific embodiments

[0025] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to Figures 1-10 , an embodiment provided by the present utility model:

[0027] A manual driving device for a belt-driven compact shelf with a new type of braking mechanism, comprising an integrated board 1 and a driving pulley 3, a tension pulley 4, a transition pulley 6 and an output pulley 7 which are rotatably arranged on the integrated board 1 in sequence from top to bottom. The driving pulley 3 is fixedly connected with a crank 2 through a straight shaft 201. The straight shaft 201 is rotatably connected with the integrated board 1. By rotating the crank 2, the driving pulley 3 can be driven to rotate. Below the straight shaft 201, a first shaft 401, a second shaft 603 and a third shaft 703 are arranged in sequence. One ends of the first shaft 401, the second shaft 603 and the third shaft 703 are fixedly connected with the integrated board 1 through bolts respectively, and the other ends are suspended. The number of the first shafts 401 is two and they are symmetrically arranged. The tension pulley 4 is rotatably connected with the first shaft 401 through a first bearing 402. Both ends of the tension pulley 4 are axially positioned by a first retaining ring 403. The tension pulley 4 is axially aligned with the driving pulley 3. The transition pulley 6 comprises a first large pulley 601 and a first small pulley 602 which are coaxially and fixedly connected. The transition pulley 6 is rotatably connected with the second shaft 603 through a second bearing 604. Both ends of the transition pulley 6 are axially positioned by a second retaining ring 605. The first large pulley 601 is axially aligned with the tension pulley 4. The output pulley 7 comprises a second large pulley 701 and a second small pulley 702 which are coaxially and fixedly connected. The output pulley 7 is rotatably connected with the third shaft 703 through a third bearing 704. Both ends of the output pulley 7 are axially positioned by a third retaining ring 705. The second small pulley 702 is axially aligned with the first large pulley 601. The driving pulley 3 is drivingly connected with the first large pulley 601 of the transition pulley 6 through a first synchronous belt 10 across the tension pulley 4. The first small pulley 602 of the transition pulley 6 is drivingly connected with the second large pulley 701 of the output pulley 7 through a second synchronous belt 12. The second small pulley 702 of the output pulley 7 is drivingly connected with a traveling pulley 8 on a compact shelf traveling device 9 through a third synchronous belt 13. A fourth shaft 1101 is arranged between the straight shaft 201 and the first shaft 401. The fourth shaft 1101 is fixedly connected with the integrated board 1 through a bolt. A tension bearing 11 is axially positioned on the fourth shaft 1101 through a fourth retaining ring 1102. The tension bearing 11 presses the first synchronous belt 10.

[0028] Above the transition pulley 6, there is a pulley braking mechanism 5. The pulley braking mechanism 5 includes a bracket 501 and a sliding unit 511. The bracket 501 is fixedly connected to the integrated board 1. The sliding unit 511 is slidably connected to the bracket 501. The sliding unit 511 straddles both ends of the transition pulley 6. One end of the sliding unit 511 is fixedly connected to an electric push rod 521. The electric push rod 521 is slidably connected to the bracket 501. The driving end of the electric push rod 521 is fixedly connected to a first friction plate 524. The other end of the sliding unit 511 is fixedly connected to a second friction plate 525. When the electric push rod 521 extends, it pushes the first friction plate 524 and the second friction plate 525 to clamp the transition pulley 6. An elastic unit is arranged between the bracket 501 and the sliding unit 511. When the electric push rod 521 contracts, the elastic unit springs the first friction plate 524 and the second friction plate 525 to both sides.

[0029] Among them, the bracket 501 includes a cross plate 502 and a connecting plate 503. The connecting plate 503 is fixedly connected to the integrated board 1 by bolts. The cross plate 502 is perpendicularly welded to the connecting plate 503. A rib plate 504 is welded between the cross plate 502 and the connecting plate 503. Below the end of the cross plate 502, two parallel vertical plates 505 are welded. The end of the vertical plate 505 is fixedly connected to a support plate 506 for supporting the electric push rod 521. A sliding hole 509 is opened in the middle of the vertical plate 505, and a sliding groove 510 is opened at the bottom of the vertical plate 505.

[0030] Among them, the sliding unit 511 includes a sliding rod 512. The diameter of the sliding rod 512 matches the diameter of the sliding hole 509. One end of the sliding rod 512 is detachably fixedly connected to a first push plate 513 by a nut for convenient installation and disassembly. The other end is welded with a second push plate 515. A first mounting seat 514 is welded to the bottom of the first push plate 513. The bottom of the second push plate 515 is welded with a second friction plate mounting plate 517 through a connecting block 516. The second friction plate 525 is adhesively or screw - fixedly connected to the second friction plate mounting plate 517. The sliding rod 512 is sleeved in the sliding hole 509 and slidably connected to the bracket 501, enabling the sliding unit 511 to slide left and right.

[0031] Among them, the main body of the electric push rod 521 is sleeved in the sliding groove 510 and slidably connected to the bracket 501, enabling the electric push rod 521 to slide left and right. The fixed end of the electric push rod 521 is sleeved in the first mounting seat 514 and fixedly connected to the first mounting seat 514 by bolts. The driving end of the electric push rod 521 is sleeved with a second mounting seat 522 and fixedly connected to the second mounting seat 522 by bolts. The second mounting seat 522 is fixedly connected to a first friction plate mounting plate 523. The first friction plate 524 is adhesively or screw - fixedly connected to the first friction plate mounting plate 523.

[0032] Among them, the elastic unit includes a spring seat 507, a compression spring 520, a fixing plate 518, and a short shaft 519. The fixing plate 518 is welded to the middle of the sliding rod 512. The short shaft 519 is threadedly fixed to the fixing plate 518 and is located below the sliding rod 512. The spring seat 507 is welded to the middle of the vertical plate 505 adjacent to the fixing plate 518 and the opening faces the short shaft 519. The spring seat 507 and the short shaft 519 are coaxial. The compression spring 520 is located inside the spring seat 507 and sleeved on the short shaft 519. The two ends of the compression spring 520 respectively abut against the vertical plate 505 and the fixing plate 518.

[0033] Among them, a limiting rod 508 is threadedly connected to the middle of the outermost vertical plate 505 on the bracket 501. The limiting rod 508 faces outward. By rotating the limiting rod 508, the extending length of the limiting rod 508 can be adjusted, so as to adjust the limiting position of the sliding unit 511. When the first friction plate 524 and the second friction plate 525 clamp the transition pulley 6, the distance between the limiting rod 508 and the first push plate 513 is controlled within 3 mm.

[0034] The electric push rod 521 is of the model IP60, with an empty-load speed of 4 mm / s, a thrust of 150 N, a stroke set to 6 mm, and is powered by 24V DC. The electric push rod 521 is provided with two control buttons for pushing / retracting, which respectively control the extending and retracting actions of the electric push rod 521. The control switch is arranged on the integrated board 1 and is located above the belt pulley braking mechanism 5.

[0035] When the mobile rack is in the locked state, that is, when the belt pulley braking mechanism 5 is in the braking state, under the action of the electric push rod 521, the first friction plate 524 and the second friction plate 525 clamp the intermediate pulley 6, and the intermediate pulley 6 cannot rotate. When the mobile rack needs to move, press the retract button, and the push rod of the electric push rod 521 retracts, driving the first friction plate 524 away from the intermediate pulley 6. At this time, the compression spring 520 pushes the fixing plate 518, the sliding rod 512 and the second friction plate 525 to move leftward, so that the second friction plate 525 leaves the intermediate pulley 6. While the sliding rod 512 moves leftward, it will also drive the body of the electric push rod 521 to move leftward in the chute 510, making the first friction plate 524 approach the intermediate pulley 6. The push rod of the electric push rod 521 continues to retract and drives the sliding rod 512 and the second friction plate 525 to continue to move leftward away from the intermediate pulley 6. When the first push plate 513 contacts the limit rod 508, the sliding rod 512 and the second friction plate 525 no longer move leftward. Since the distance between the limit rod 508 and the first push plate 513 is 3 mm when the belt pulley braking mechanism 5 is in the braking state, the distance that the second friction plate 525 leaves the intermediate pulley 6 is also 3 mm at this time. The push rod of the electric push rod 521 continues to retract, driving the first friction plate 524 away from the intermediate pulley 6. The stroke of the electric push rod 521 is 6 mm. Therefore, when the electric push rod 521 is fully retracted, the distance between the first friction plate 524 and the intermediate pulley 6 is also 3 mm. At this time, the braking state of the intermediate pulley 6 has been released. Then, turn the crank 2 to drive the driving pulley 3, the intermediate pulley 6, the output pulley 7 and the traveling pulley 8 to rotate, thereby driving the traveling device 9 of the mobile rack and making the mobile rack move along the guide rail.

[0036] When the mobile rack no longer needs to move and needs to be locked, press the push-out button. After the electric push rod 521 pushes the first friction plate 524 against the intermediate pulley 6, the electric push rod 521 overcomes the acting force of the compression spring 520 and pushes the first push plate 513, the sliding rod 512 and the second friction plate 525 to move rightward until the second friction plate 525 presses tightly against the intermediate pulley 6 to realize the braking of the intermediate pulley 6. The electric push rod 521 has an automatic locking function. Even when the power is off, the electric push rod 521 will maintain its original state and will not return to its original position due to power failure, and the locking state of the intermediate pulley 6 is stable.

[0037] The existing locking and braking device 15 on the chain-driven mobile rack is as Figure 11 shown. When locking, manually rotate the brake rod 1504 clockwise to drive the cam 1503 to rotate clockwise, so that the conical head at the tail of the locking rod 1501 extends outward and is inserted into the tooth groove of the intermediate sprocket 14, making the intermediate sprocket 14 unable to rotate to achieve the purpose of locking the intermediate sprocket 14. When unlocking, manually rotate the brake rod 1504 counterclockwise to drive the cam 1503 to rotate counterclockwise. Under the action of the return spring 1502, the conical head at the tail of the locking rod 1501 retracts inward and leaves the tooth groove of the intermediate sprocket 14 to achieve the purpose of unlocking the intermediate sprocket 14.

[0038] Since the pulley usually has no toothed structure, or even if it does, the tooth grooves are very shallow. If the structure of the locking brake device 15 is used to brake the transition pulley 6, the locking rod 1501 has no groove to catch, and the transition pulley 6 cannot be effectively braked. If we want to rely on the tail of the locking rod 1501 to radially press against the pulley groove of the transition pulley 6 to achieve the purpose of braking, on the one hand, this pressing force needs to be large enough, and it is not very realistic to rely solely on manually rotating the brake lever 1504 and the cam 1503 to achieve this force. On the other hand, too large a pressing force will damage the pulley groove and also apply a large pressure to the pulley shaft for a long time, deforming the pulley shaft and affecting normal use.

[0039] The structure of the present utility model is ingenious. It is provided with a pulley braking mechanism 5. The pulley braking mechanism 5 includes a bracket 501 and a sliding unit 511. The bracket 511 is fixedly connected to the integrated board 1, the sliding unit 511 is slidably connected to the bracket 501. One end of the sliding unit 511 is fixedly connected to a first friction plate 524 through an electric push rod 521, and the other end is fixedly connected to a second friction plate 525. The sliding unit 511 straddles the transition pulley 6 and makes the first friction plate 524 and the second friction plate 525 located at both ends of the transition pulley 6. By the telescopic action of the electric push rod 521, the first friction plate 524 and the second friction plate 525 clamp or loosen the transition pulley 6, thereby effectively realizing the braking or releasing of the transition pulley 6. The braking force of the pulley braking mechanism 5 does not act radially on the pulley groove of the transition pulley 6, but acts on the two side end faces of the transition pulley 6, and will not damage the pulley groove and the pulley shaft.

[0040] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A manual driving device for a belt-driven compact rack with a novel braking mechanism, comprising an integrated board (1), a rotatable driving pulley (3), a tension pulley (4), a transition pulley (6) and an output pulley (7) which are fixedly arranged on the integrated board (1) in sequence from top to bottom. The driving pulley (3) is fixedly connected with a crank (2). The driving pulley (3) is drivingly connected with the transition pulley (6) through a first synchronous belt (10) that bypasses the tension pulley (4). The transition pulley (6) is drivingly connected with the output pulley (7) through a second synchronous belt (12). It is characterized in that: Above the said transition pulley (6), there is a pulley braking mechanism (5). The pulley braking mechanism (5) includes a bracket (501) and a sliding unit (511). The bracket (501) is fixedly connected to the integrated board (1). The sliding unit (511) is slidably connected to the bracket (501). The sliding unit (511) straddles both ends of the transition pulley (6). One end of the sliding unit (511) is fixedly connected to an electric push rod (521). The electric push rod (521) is slidably connected to the bracket (501). The driving end of the electric push rod (521) is fixedly connected to a first friction plate (524). The other end of the sliding unit (511) is fixedly connected to a second friction plate (525). When the electric push rod (521) extends, it pushes the first friction plate (524) and the second friction plate (525) to clamp the transition pulley (6). An elastic unit is arranged between the bracket (501) and the sliding unit (511). When the electric push rod (521) contracts, the elastic unit springs the first friction plate (524) and the second friction plate (525) apart to both sides.

2. The manual driving device of the belt-driven compact rack with a new braking mechanism according to claim 1, characterized in that: The bracket (501) includes a cross plate (502) and a connecting plate (503). The connecting plate (503) is fixedly connected to the integrated board (1) by bolts. The cross plate (502) is perpendicularly and fixedly connected to the connecting plate (503). A rib plate (504) is fixedly arranged between the cross plate (502) and the connecting plate (503). Below the end of the cross plate (502), two parallel vertical plates (505) are fixedly connected. The end of the vertical plate (505) is fixedly connected to a support plate (506). A sliding hole (509) is formed in the middle of the vertical plate (505), and a sliding groove (510) is formed at the bottom of the vertical plate (505).

3. The manual driving device of the belt-driven compact shelf with a novel braking mechanism according to claim 2, characterized in that: The sliding unit (511) includes a sliding rod (512). The diameter of the sliding rod (512) matches the aperture of the sliding hole (509). One end of the sliding rod (512) is detachably and fixedly connected to a first push plate (513), and the other end is fixedly connected to a second push plate (515). A first mounting seat (514) is fixedly connected to the bottom of the first push plate (513). The bottom of the second push plate (515) is fixedly connected to a second friction plate mounting plate (517) through a connecting block (516). The second friction plate (525) is fixedly connected to the second friction plate mounting plate (517). The sliding rod (512) is sleeved in the sliding hole (509) and is slidably connected to the bracket (501).

4. A manual driving device for a belt-driven compact rack with a novel braking mechanism according to claim 3, characterized in that: The main body of the electric push rod (521) is sleeved in the sliding groove (510) and is slidably connected to the bracket (501). The fixed end of the electric push rod (521) is sleeved in the first mounting seat (514) and is fixedly connected to the first mounting seat (514) by bolts. The driving end of the electric push rod (521) is sleeved with a second mounting seat (522) and is fixedly connected to the second mounting seat (522) by bolts. The second mounting seat (522) is fixedly connected to a first friction plate mounting plate (523). The first friction plate (524) is fixedly connected to the first friction plate mounting plate (523).

5. A manual driving device for a belt-driven compact rack with a new braking mechanism according to claim 3, characterized in that: The elastic unit includes a spring seat (507), a compression spring (520), a fixing plate (518) and a short shaft (519). The fixing plate (518) is fixedly arranged in the middle of the sliding rod (512). The short shaft (519) is fixedly connected to the fixing plate (518) and is located at the lower part of the sliding rod (512). The spring seat (507) is fixedly arranged in the middle of the vertical plate (505) adjacent to the fixing plate (518) and the opening faces the short shaft (519). The spring seat (507) and the short shaft (519) are coaxial. The compression spring (520) is located in the spring seat (507) and sleeved on the short shaft (519). Two ends of the compression spring (520) respectively abut against the vertical plate (505) and the fixing plate (518).

6. The manual driving device of the belt-driven compact rack with a new braking mechanism according to claim 3, characterized in that: A limiting rod (508) is fixedly arranged in the middle of the outermost vertical plate (505) on the bracket (501), and the limiting rod (508) faces outward. When the first friction plate (524) and the second friction plate (525) clamp the transition pulley (6), the distance between the limiting rod (508) and the first push plate (513) is controlled within 2-4 mm.

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