Automatic unloading device for overload protection of elevator

Abstract

The invention belongs to the technical field of elevator overload protection, and discloses an elevator overload protection automatic discharging device which comprises a lifting table, a base is fixedly connected to the bottom of one side of the lifting table, a discharging box is fixedly connected to the top of the base, and a chain groove is formed in one side of the interior of the lifting table. A motor is started to enable an output rod and a chain wheel to rotate anticlockwise, a chain is driven to slide in a chain groove through rotation of the chain wheel, meanwhile, a protection frame is driven to ascend to drive a first feeding frame to ascend, a connecting block and a guide rod can move upwards in the ascending process, and the connecting block can be matched with a groove in the moving process; at the moment, the guide rod can abut against the abutting groove, after the guide rod abuts against the abutting groove, the first feeding frame continues to move upwards, at the moment, the first feeding frame is turned over through abutting of the guide rod and the abutting groove, and when the first feeding frame is turned over, materials stored in the first feeding frame can be fed into a first discharging inclined groove so that automatic discharging can be conducted.

Description

Technical Field

[0001] The invention belongs to the technical field of hoist overload protection, in particular to an automatic unloading device for hoist overload protection. Background Art

[0002] A hoist is a mechanical equipment used to transport materials vertically or obliquely. It is widely used in industrial production, such as mining, construction, chemical industry, metallurgy and other industries. Its main function is to drive the lifting mechanism of the hoist through an electric motor or other power device to lift materials from one position to another. The hoist device usually includes a hoist body, a drive device, a control system and a safety protection device. The hoist body is composed of structural components such as a frame, a pit, and a guardrail, which carry and support the entire system. The drive device includes an electric motor, a reducer and a transmission device, which is used to provide power. The control system includes an electrical control cabinet, buttons, sensors, etc., which are used to control the start and stop, running speed and limit functions of the hoist. Safety protection devices such as overload protection and speed limiter ensure the safe operation of the hoist. The advantages of the hoist are saving floor space, adjustable conveying height, fast conveying speed and economy and practicality.

[0003] An elevator is needed when processing hardware parts. However, the elevators used in the common hardware parts processing cannot automatically load and unload materials, which will lead to low production efficiency and require workers to manually intervene when loading and unloading materials, increasing labor intensity and the risk of errors. At the same time, due to the uncertainty of manual operation, the elevator may cause discontinuous operation or inaccurate material handling, thereby affecting the production rhythm and product quality. In addition, long-term reliance on manual labor may affect the long-term stability of the equipment, resulting in poor production processes and even safety hazards. Summary of the invention

[0004] In order to solve the problem raised in the above background technology that the elevator used in the common hardware parts processing cannot automatically load and unload materials, which will lead to low production efficiency and the need for manual intervention of workers during loading and unloading, increasing labor intensity and the risk of errors, and at the same time due to the uncertainty of manual operation, it may cause discontinuous operation of the elevator or inaccurate material handling, thereby affecting the production rhythm and product quality. In addition, long-term reliance on manual labor may affect the long-term stability of the equipment, resulting in poor production process and even safety hazards. The present invention provides an automatic unloading device for elevator overload protection.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic unloading device for overload protection of a hoist, comprising a lifting platform, a base is fixedly connected to the bottom of one side of the lifting platform, a material discharge box is fixedly connected to the top of the base, a chain groove is opened on one side of the interior of the lifting platform, three rotating rods are installed inside the chain groove, the outer walls of the three rotating rods are fixedly connected to support wheels, and the support wheels rotate in the chain groove, a chain is installed in the inner cavity of the chain groove, and the chain cooperates with the support wheel, an output rod is penetrated and rotatably connected to one side of the inner cavity bottom of the chain groove, a sprocket is fixedly connected to the outer wall of the output rod, and the sprocket is meshed with the chain;

[0006] Slide grooves are provided on both sides of the inner wall of the lifting platform, both ends of the chain pass through the lifting platform and are fixedly connected with mounting blocks, a protection frame is slidably connected between the two mounting blocks, pulleys are installed on both sides of the protection frame away from the mounting blocks, and the pulleys slide in the slide grooves, rotating shafts are rotatably connected on both sides of the inner cavity of the protection frame, a feeding frame 1 is fixedly connected between the two rotating shafts, two connecting blocks are fixedly connected to one side of the feeding frame 1, and a guide rod is fixedly connected between the two connecting blocks.

[0007] Preferably, the two rotating rods of the chain slot are arranged on the lower side of the horizontal middle surface of the square upper crossbeam of the lifting platform, and the upper crossbeam is provided with a chain upper slot with a depth of 2 / 3;

[0008] Another rotating rod 1 and the output rod of the chain groove are arranged on the upper side of the horizontal middle surface of the square lower crossbeam of the lifting platform, and the lower crossbeam is provided with a chain lower slot with a depth between 3 / 4 and 7 / 8;

[0009] There are six pulleys, three of which are arranged on both sides of the protection frame, and the three pulleys are named upper pulley, middle pulley and lower pulley, wherein the distance between the upper pulley and the middle pulley is only 2 / 3 of the distance between the middle pulley and the lower pulley;

[0010] The upper pulley is made of a material that is more wear-resistant and more resistant to deformation.

[0011] Preferably, a material unloading frame is installed on the upper part of one side of the lifting platform away from the base, the inner cavity of the material unloading frame penetrates and is provided with a material unloading chute 1, grooves are provided on both sides of the material unloading chute 1, and the grooves are matched with the connecting block, and a resistance groove is provided at the bottom between the two grooves, and the resistance groove is matched with the guide rod;

[0012] The inner cavity of the discharge box is provided with a second material discharge chute, the interior of the second material discharge chute is rotatably connected to a second rotating rod, the outer wall of the second rotating rod is fixedly connected to a connecting sleeve, and the bottom of the connecting sleeve is fixedly connected to a second feeding frame.

[0013] Preferably, an extrusion groove is opened inside the base and one side of the discharge box, support rods are fixedly connected to the bottom two sides of the extrusion groove, springs are sleeved on the outer walls of the two support rods, and a material baffle plate is passed through and slidably connected to the top of the two support rods, and the material baffle plate slides in the extrusion groove.

[0014] Preferably, a rack groove is provided on the side of the base and the discharge box away from the extrusion groove, a rack is fixedly connected to one side of the baffle plate, and the rack slides in the rack groove, a feed groove is provided on the side of the feeding frame away from the connecting block, a resistance plate is fixedly connected to the bottom of the feed groove, and the resistance plate resists the baffle plate.

[0015] Preferably, an outer wall of one side of the rotating rod 2 passes through the discharge box and is fixedly connected with a gear, and the gear and the rack are meshed with each other.

[0016] Preferably, a motor is installed on one side of the interior of the base, and an output end of the motor passes through the base and is fixedly connected to the sprocket.

[0017] Preferably, annular grooves are provided on both sides of the inner cavity of the protection frame, and an annular spring is fixedly connected to one side of the inner cavity of the annular groove.

[0018] Preferably, sliders are fixedly connected to both sides of the feeding frame 1, and the sliders slide in the annular grooves and are fixedly connected to the annular springs.

[0019] Preferably, buffer grooves are provided on both sides of the bottom of the inner cavity of the lifting platform, the inner cavities of the two buffer grooves are fixedly connected with buffer springs, the two buffer springs are fixedly connected with buffer plates on the side away from the buffer grooves, the tops of the two buffer plates are fixedly connected with rubber plates, and the lifting platform is provided with multiple mounting holes on both sides close to the unloading frame.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention can carry out automatic unloading by setting the cooperation of structures such as the protection frame and the unloading frame. The motor is turned on to make the output rod and the sprocket rotate counterclockwise, and the rotation of the sprocket drives the chain to slide in the chain groove, and at the same time drives the protection frame to rise. At this time, the pulleys on both sides of the protection frame will slide in the slide groove, and the feeding frame will be driven to rise during the rising process of the protection frame. During the rising process, the connecting block and the guide rod will move upward, and the connecting block will cooperate with the groove during the movement. At this time, the guide rod will contact the interference groove, and the feeding frame will continue to move upward after the guide rod contacts the interference groove. At this time, the feeding frame is flipped over by the interference between the guide rod and the interference groove, and the material stored in the feeding frame can be put into the unloading chute when the feeding frame is flipped over.

[0022] The present invention can carry out automatic loading by setting the cooperation of structures such as the contact plate and the material baffle plate. The output rod and the sprocket are controlled to rotate clockwise by the motor, and the chain is driven to rotate clockwise at the same time. At this time, the chain will drive the protection frame to move downward. During the downward movement of the protection frame, the contact plate will contact the material baffle plate, so that the lower material baffle plate moves down in the extrusion groove and the spring is compressed at the same time. During the downward movement of the material baffle plate, the rack is driven to move downward in the rack groove. At this time, the rack groove will mesh with the gear and drive the rotating rod 2 to rotate. When the rotating rod 2 rotates, the hardware parts placed in the unloading chute 2 are flipped to the other side of the feeding frame 2 through the feeding frame 2. At this time, the hardware materials will slide into the feed chute through the gravity of the unloading chute 2 and enter the feeding frame 1 for automatic loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 A side sectional view of the lifting platform of the present invention;

[0025] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the protection frame of the present invention;

[0027] Figure 5 It is a schematic diagram of the rotating shaft of the present invention;

[0028] Figure 6 A side sectional view of the blanking frame of the present invention;

[0029] Figure 7 A side sectional view of the discharge box of the present invention;

[0030] Figure 8 Schematic diagram of the rack of the present invention.

[0031] In the figure: 1, lifting platform; 2, base; 3, material discharge box; 4, chain groove; 5, rotating rod 1; 6, support wheel; 7, chain; 8, output rod; 9, sprocket; 10, slide; 11, mounting block; 12, protection frame; 13, pulley; 14, rotating shaft; 15, feeding frame 1; 16, connecting block; 17, guide rod; 18, slider; 19, annular groove; 20, annular spring; 21, unloading frame; 22, unloading chute 1; 2 3. Groove; 24. Resistance groove; 25. Feed trough; 26. Resistance plate; 27. Unloading chute 2; 28. Rotating rod 2; 29. ​​Connecting sleeve; 30. Feeding frame 2; 31. Extrusion groove; 32. Support rod; 33. Spring; 34. Baffle plate; 35. Rack groove; 36. Rack; 37. Gear; 38. Motor; 39. Buffer groove; 40. Buffer spring; 41. Buffer plate; 42. Rubber plate; 43. Mounting hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 8 As shown, the present invention provides an automatic unloading device for overload protection of a hoist, comprising a lifting platform 1, a base 2 is fixedly connected to the bottom of one side of the lifting platform 1, a material discharge box 3 is fixedly connected to the top of the base 2, a chain groove 4 is opened on one side of the interior of the lifting platform 1, three rotating rods 5 are installed inside the chain groove 4, a support wheel 6 is fixedly connected to the outer wall of the three rotating rods 5, and the support wheel 6 rotates in the chain groove 4, a chain 7 is installed in the inner cavity of the chain groove 4, and the chain 7 cooperates with the support wheel 6, an output rod 8 is penetrated and rotatably connected to one side of the inner cavity bottom of the chain groove 4, and the outer wall of the output rod 8 is fixedly connected to the chain Wheel 9, and sprocket wheel 9 is meshed and connected with chain 7, both sides of the inner wall of lifting platform 1 are provided with slide grooves 10, both ends of chain 7 pass through lifting platform 1 and are fixedly connected with mounting blocks 11, a protection frame 12 is slidably connected between the two mounting blocks 11, pulleys 13 are installed on both sides of the protection frame 12 away from the mounting blocks 11, and the pulley 13 slides in the slide groove 10, and rotating shafts 14 are rotatably connected on both sides of the inner cavity of the protection frame 12, a feeding frame 15 is fixedly connected between the two rotating shafts 14, one side of the feeding frame 15 is fixedly connected with two connecting blocks 16, and a guide rod 17 is fixedly connected between the two connecting blocks 16;

[0034] The two rotating rods 5 of the chain groove are arranged on the lower side of the horizontal middle surface of the square upper crossbeam of the lifting platform 1, and the upper crossbeam is provided with a chain upper groove with a depth of 2 / 3;

[0035] Another rotating rod 5 and an output rod 8 of the chain groove are arranged on the upper side of the horizontal middle surface of the square lower crossbeam of the lifting platform 1, and the lower crossbeam is provided with a chain lower groove with a depth between 3 / 4 and 7 / 8;

[0036] There are six pulleys 13, three of which are arranged on both sides of the protection frame 12, and the three pulleys are named upper pulley, middle pulley and lower pulley, wherein the distance between the upper pulley and the middle pulley is only 2 / 3 of the distance between the middle pulley and the lower pulley;

[0037] The upper pulley is made of a more wear-resistant and deformation-resistant material 3;

[0038] A material unloading frame 21 is installed on the upper part of one side of the lifting platform 1 away from the base 2. The inner cavity of the material unloading frame 21 penetrates and is provided with a material unloading chute 22. Grooves 23 are provided on both sides of the material unloading chute 22, and the grooves 23 are matched with the connecting block 16. A resistance groove 24 is provided at the bottom between the two grooves 23, and the resistance groove 24 is matched with the guide rod 17.

[0039] A motor 38 is installed on one side of the interior of the base 2 , and an output end of the motor 38 passes through the base 2 and is fixedly connected to the sprocket 9 .

[0040] Adopting the above scheme: when the material rises, the motor 38 can be turned on to make the output rod 8 and the sprocket 9 rotate counterclockwise, and the rotation of the sprocket 9 drives the chain 7 to slide in the chain groove 4. At this time, the rotating rod 15 and the supporting wheel 6 will rotate through the chain 7. At this time, the chain 7 will drive the protection frame 12 to rise through the mounting block 11. At this time, the pulleys 13 on both sides of the protection frame 12 will slide in the slide groove 10. In the process of the protection frame 12 rising, the feeding frame 15 will be driven to rise, and the connecting block 16 and the guide rod 17 will move upward in the process of rising. During the movement, the connecting block 16 will cooperate with the groove 23, and the guide rod 17 will contact the contact groove 24. After the guide rod 17 contacts the contact groove 24, the feeding frame 15 continues to move upward. At this time, the feeding frame 15 is turned over by the contact between the guide rod 17 and the contact groove 24. When the feeding frame 15 is turned over, the material stored in the feeding frame 15 can be put into the unloading chute 22, and the material can be unloaded automatically. When the feeding frame 15 is reversed, the slider 18 is driven to slide in the annular groove 19 to compress the annular spring 20.

[0041] When loading is completed, the control motor 38 makes the output rod 8 and the sprocket 9 rotate clockwise, and at the same time drives the chain 7 to rotate clockwise. At this time, the chain 7 will drive the protection frame 12 to move downward. When the protection frame 12 moves downward, the guide rod 17 will be out of contact with the interference groove 24. At this time, the feeding frame 15 will be reset through the slider 18 by the elastic force of the annular spring 20.

[0042] like Figures 1 to 8 As shown, the inner cavity of the discharge box 3 is provided with a second material discharge chute 27, the interior of the second material discharge chute 27 is rotatably connected to a second rotating rod 28, the outer wall of the second rotating rod 28 is fixedly connected to a connecting sleeve 29, and the bottom of the connecting sleeve 29 is fixedly connected to a second feeding frame 30;

[0043] An extrusion groove 31 is provided inside one side of the base 2 and the discharge box 3. Support rods 32 are fixedly connected to both sides of the bottom of the extrusion groove 31. Springs 33 are sleeved on the outer walls of the two support rods 32. A material blocking plate 34 is penetrated and slidably connected to the top of the two support rods 32, and the material blocking plate 34 slides in the extrusion groove 31.

[0044] A rack groove 35 is provided on the side of the base 2 and the discharge box 3 away from the extrusion groove 31, a rack 36 is fixedly connected to one side of the baffle plate 34, and the rack 36 slides in the rack groove 35, a feed groove 25 is provided on the side of the feed frame 15 away from the connection block 16, a contact plate 26 is fixedly connected to the bottom of the feed groove 25, and the contact plate 26 contacts the baffle plate 34;

[0045] One side outer wall of the rotating rod 28 passes through the discharge box 3 and is fixedly connected with a gear 37, and the gear 37 and the rack 36 are meshed with each other;

[0046] Annular grooves 19 are provided on both sides of the inner cavity of the protection frame 12, and an annular spring 20 is fixedly connected to one side of the inner cavity of the annular groove 19;

[0047] Slide blocks 18 are fixedly connected to both sides of the feeding frame 15 , and the slide blocks 18 slide in the annular grooves 19 and are fixedly connected to the annular springs 20 .

[0048] The above scheme is adopted: during the downward movement of the protection frame 12, the abutment plate 26 will abut against the baffle plate 34, so that the lower baffle plate 34 moves down in the extrusion groove 31 and the spring 33 is compressed at the same time. During the downward movement of the baffle plate 34, the rack 36 will be driven to move down in the rack groove 35. At this time, the rack groove 35 will mesh with the gear 37 to drive the rotating rod 28 to rotate. When the rotating rod 28 rotates, the hardware parts placed in the lower chute 27 will be flipped to the other side of the feeding frame 30 through the feeding frame 2. At this time, the hardware materials will slide into the feeding trough 25 by the gravity of the lower chute 27 and enter the feeding frame 15 for automatic loading.

[0049] After the automatic loading is completed, the motor 38 is controlled to rotate the output rod 8 and the sprocket 9 counterclockwise to move the protection frame 12 upward. During the upward movement of the protection frame 12, the contact plate 26 will be released from the contact with the baffle plate 34. At this time, the baffle plate 34 will be reset by the elastic force of the spring 33, and the rack 36 will be reset by the baffle plate 34.

[0050] like Figures 1 to 8As shown, buffer grooves 39 are provided on both sides of the bottom of the inner cavity of the lifting platform 1, and the inner cavities of the two buffer grooves 39 are fixedly connected with buffer springs 40, and the two buffer springs 40 are fixedly connected with a buffer plate 41 on the side away from the buffer groove 39, and the tops of the two buffer plates 41 are fixedly connected with rubber plates 42, and the lifting platform 1 is provided with multiple mounting holes 43 on both sides close to the unloading frame 21.

[0051] With the above solution, when the protection frame 12 moves downward, the bottom of the protection frame 12 will contact the rubber plate 42, causing the buffer plate 41 to move downward and compress the buffer spring 40, thereby buffering the protection frame 12 and preventing the protection frame 12 from causing collision when it moves downward too quickly.

[0052] The position of the blanking frame 21 can be adjusted through the mounting holes 43 .

[0053] The working principle and use process of the present invention:

[0054] First, when the material rises, the motor 38 can be turned on to make the output rod 8 and the sprocket 9 rotate counterclockwise, and the rotation of the sprocket 9 drives the chain 7 to slide in the chain groove 4. At this time, the rotating rod 15 and the supporting wheel 6 will rotate through the chain 7. At this time, the chain 7 will drive the protection frame 12 to rise through the mounting block 11. At this time, the pulleys 13 on both sides of the protection frame 12 will slide in the slide groove 10. In the process of the protection frame 12 rising, the feeding frame 15 will be driven to rise, and the connecting block 16 and the guide rod 17 will move upward in the process of rising. During the movement, the connecting block 16 will cooperate with the groove 23, and the guide rod 17 will contact the contact groove 24. After the guide rod 17 contacts the contact groove 24, the feeding frame 15 continues to move upward. At this time, the feeding frame 15 is turned over by the contact between the guide rod 17 and the contact groove 24. When the feeding frame 15 is turned over, the material stored in the feeding frame 15 can be put into the unloading chute 22, and the material can be unloaded automatically. When the feeding frame 15 is reversed, the slider 18 is driven to slide in the annular groove 19 to compress the annular spring 20.

[0055] When the feeding is completed, the control motor 38 makes the output rod 8 and the sprocket 9 rotate clockwise, and at the same time drives the chain 7 to rotate clockwise. At this time, the chain 7 will drive the protection frame 12 to move downward. When the protection frame 12 moves downward, the guide rod 17 will be out of contact with the abutment groove 24. At this time, the feeding frame 15 will be reset through the slider 18 by the elastic force of the annular spring 20. In the process of the protection frame 12 moving downward, it will contact the baffle plate 34 through the abutment plate 26, so that the lower baffle plate 34 moves downward in the extrusion groove 31. The spring 33 is compressed, and the rack 36 is driven to move downward in the rack groove 35 during the downward movement of the baffle plate 34. At this time, the rack groove 35 is engaged with the gear 37 to drive the rotating rod 28 to rotate. When the rotating rod 28 rotates, the hardware parts placed in the unloading chute 27 are flipped to the other side of the feeding frame 30 through the feeding frame 2 30. At this time, the hardware materials will slide into the feeding chute 25 through the gravity of the unloading chute 27 and enter the feeding frame 15 for automatic loading.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic unloading device for hoisting machine overload protection, comprising a lifting platform (1), characterized in that: The bottom of one side of the lifting platform (1) is fixedly connected to a base (2), the top of the base (2) is fixedly connected to a material discharge box (3), a chain groove (4) is opened on one side of the interior of the lifting platform (1), three rotating rods (5) are installed inside the chain groove (4), the outer walls of the three rotating rods (5) are fixedly connected to support wheels (6), and the support wheels (6) rotate in the chain groove (4), the inner cavity of the chain groove (4) is installed with a chain (7), and the chain (7) cooperates with the support wheel (6), an output rod (8) passes through one side of the inner cavity bottom of the chain groove (4) and is rotatably connected, the outer wall of the output rod (8) is fixedly connected to a sprocket (9), and the sprocket (9) is meshed with the chain (7); Slide grooves (10) are provided on both sides of the inner wall of the lifting platform (1), and both ends of the chain (7) pass through the lifting platform (1) and are fixedly connected to mounting blocks (11), a protection frame (12) is slidably connected between the two mounting blocks (11), pulleys (13) are installed on both sides of the protection frame (12) away from the mounting blocks (11), and the pulleys (13) slide in the slide grooves (10), and rotating shafts (14) are rotatably connected on both sides of the inner cavity of the protection frame (12), and a feeding frame (15) is fixedly connected between the two rotating shafts (14), and one side of the feeding frame (15) is fixedly connected to two connecting blocks (16), and a guide rod (17) is fixedly connected between the two connecting blocks (16).

2. The automatic unloading device for overload protection of the hoist according to claim 1 is characterized in that: The two rotating rods (5) of the chain groove are arranged on the lower side of the horizontal middle surface of the square upper crossbeam of the lifting platform (1), and the upper crossbeam is provided with a chain upper groove with a depth of 2 / 3; Another rotating rod (5) and an output rod (8) of the chain groove are arranged on the upper side of the horizontal middle surface of the square lower crossbeam of the lifting platform (1), and the lower crossbeam is provided with a chain lower groove with a depth between 3 / 4 and 7 / 8; There are six pulleys (13), three of which are arranged on both sides of the protection frame (12), and the three pulleys are named as an upper pulley, a middle pulley and a lower pulley, wherein the distance between the upper pulley and the middle pulley is only 2 / 3 of the distance between the middle pulley and the lower pulley.

3. The automatic unloading device for overload protection of the hoist according to claim 1 is characterized in that: A material unloading frame (21) is installed on the upper part of one side of the lifting platform (1) away from the base (2), and the inner cavity of the material unloading frame (21) penetrates and is provided with a material unloading chute (22), and grooves (23) are provided on both sides of the material unloading chute (22), and the grooves (23) are matched with the connecting block (16), and a resistance groove (24) is provided at the bottom between the two grooves (23), and the resistance groove (24) is matched with the guide rod (17); the inner cavity of the material discharge box (3) is provided with a material unloading chute (27), and the interior of the material unloading chute (27) is rotatably connected with a rotating rod (28), and the outer wall of the rotating rod (28) is fixedly connected with a connecting sleeve (29), and the bottom of the connecting sleeve (29) is fixedly connected with a feeding frame (30).

4. The automatic unloading device for overload protection of the hoist according to claim 3 is characterized in that: An extrusion groove (31) is provided inside one side of the base (2) and the discharge box (3), support rods (32) are fixedly connected to both sides of the bottom of the extrusion groove (31), springs (33) are sleeved on the outer walls of the two support rods (32), and a material blocking plate (34) passes through and is slidably connected to the top of the two support rods (32), and the material blocking plate (34) slides in the extrusion groove (31).

5. The automatic unloading device for overload protection of the hoist according to claim 4 is characterized in that: A rack groove (35) is provided on the side of the base (2) and the discharge box (3) away from the extrusion groove (31); a rack (36) is fixedly connected to one side of the baffle plate (34), and the rack (36) slides in the rack groove (35); a feed groove (25) is provided on the side of the feed frame (15) away from the connecting block (16); a contact plate (26) is fixedly connected to the bottom of the feed groove (25), and the contact plate (26) contacts the baffle plate (34).

6. The automatic unloading device for overload protection of the hoist according to claim 5 is characterized in that: One side outer wall of the second rotating rod (28) passes through the discharge box (3) and is fixedly connected with a gear (37), and the gear (37) and the rack (36) are meshed with each other.

7. The automatic unloading device for overload protection of the hoist according to claim 6 is characterized in that: A motor (38) is installed on one side of the interior of the base (2), and an output end of the motor (38) passes through the base (2) and is fixedly connected to a sprocket (9).

8. The automatic unloading device for overload protection of a hoist according to claim 7 is characterized in that: Annular grooves (19) are provided on both sides of the inner cavity of the protection frame (12), and an annular spring (20) is fixedly connected to one side of the inner cavity of the annular groove (19).

9. The automatic unloading device for overload protection of an elevator according to claim 8 is characterized in that: Slide blocks (18) are fixedly connected to both sides of the feeding frame (15), and the slide blocks (18) slide in the annular groove (19) and are fixedly connected to the annular spring (20).

10. The automatic unloading device for overload protection of an elevator according to claim 9, characterized in that: Buffer grooves (39) are provided on both sides of the bottom of the inner cavity of the lifting platform (1), and the inner cavities of the two buffer grooves (39) are fixedly connected with buffer springs (40), and the two buffer springs (40) are fixedly connected with a buffer plate (41) on the side away from the buffer groove (39), and the tops of the two buffer plates (41) are fixedly connected with a rubber plate (42), and the lifting platform (1) is provided with a plurality of mounting holes (43) on both sides close to the blanking frame (21).

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