A collision prevention device for a load elevator car wall

Abstract

The application discloses a kind of anti-collision devices of freight elevator car wall, it is related to elevator car wall anti-collision technical field, including car, the inner wall of three sides of the car is equipped with buffer plate, multiple installation slots are formed in three buffer plates.The application is provided with the setting of easy-to-dismount unit, the principle of repulsion of like poles of a magnet is used, the position of magnet is pasted on buffer plate against magnetic block, so that magnet drives magnetic block and extrusion block to move, elastic deformation occurs when elastic piece is compressed by magnetic block movement, extrusion block drives L-shaped slider and bolt to move upwards, so that bolt is away from insertion slot, so that extrusion spring drives movable rod and rotating plate to move, so that rotating plate moves out of installation slot, at this time, according to the collision condition of rotating plate, the rotating plate can be selected to be turned over and replaced, the large plate is designed as multiple replaceable small plates, and the small plates can be turned over, the effect of quick replacement is realized, and the cost of damage can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator car wall anti-collision, in particular to an anti-collision device for a freight elevator car wall. Background Art

[0002] Freight elevators are often hit by cargo when transporting cargo, which causes damage and dents to the car walls, requiring protection of the elevator car.

[0003] The Chinese patent with announcement number CN219429436U discloses an elevator car wall anti-collision device, which relates to the elevator field and includes a car inner wall and a connecting plate. A mounting plate is installed on one side of the car inner wall, and a buffer seat and a warning component are respectively provided on one side of the mounting plate. The warning component includes a trigger switch, an alarm and a pressure plate. A reset spring is connected to one side of the pressure plate, and an anti-collision plate is connected to one side of the connecting plate. Multiple movable cavities are opened on one side of the anti-collision plate, and springs are installed inside the movable cavities.

[0004] However, the above invention has the following shortcomings: most of the existing elevator car protection plates are whole pieces, so when the plate is damaged, the entire plate needs to be removed and reinstalled, which makes the plate removal process more cumbersome, time-consuming and labor-intensive, and also leads to high plate loss costs. Most of the buffering methods for elevator car protection are relatively simple, and the buffering effect is not ideal, resulting in the failure to effectively reduce the damage to the elevator car. Summary of the Invention

[0005] The object of the present invention is to provide a freight elevator car wall anti-collision device to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a freight elevator car wall anti-collision device, including a car, wherein the inner walls of the three sides of the car are each provided with a buffer plate, the three buffer plates are each provided with a plurality of mounting grooves, and one side of the three buffer plates is provided with a rotating plate, the plurality of rotating plates are respectively adapted to the plurality of mounting grooves, and further comprising:

[0007] a disassembly and assembly mechanism, the disassembly and assembly mechanism being located on the buffer plate;

[0008] a buffer mechanism, the buffer mechanism being located on the car;

[0009] The camshafts are connected to the two levers and the levers are connected to the levers with a spring which is secured to the bottom of the camshafts with respect to the first and second levers and are pivotally connected to the levers when the levers are in the unlocked position.

[0010] Preferably, multiple pairs of fixed grooves are provided on the three buffer plates, and an extrusion block is slidably connected in a pair of the fixed grooves. The two extrusion blocks are respectively located below the two L-shaped sliders. One end of the two extrusion blocks is fixedly connected to a magnetic block. The two magnetic blocks are respectively slidably connected in the two fixed grooves. Spring sheets are fixedly connected to the two magnetic blocks, and one end of the two spring sheets is fixedly connected to the buffer plate.

[0011] Preferably, the limiting unit includes movable grooves respectively opened on the inner walls of one side of the plurality of card slots, a movable block is slidably connected in the movable groove, one end of the movable block is in contact with the fixed shaft, a telescopic spring is provided in the movable groove, both ends of the telescopic spring are respectively fixedly connected to the movable block and the movable rod, and an inclined piece is fixedly connected to the top of one end of the movable block.

[0012] Preferably, one end of the movable block is fixedly connected to a clamping block, and two limiting grooves are provided in the circumferential direction of the fixed shaft, and the clamping block is located in one of the limiting grooves.

[0013] Preferably, the buffer mechanism includes a buffer unit and an alarm unit, the buffer unit includes four telescopic rods fixedly connected to the three buffer plates respectively, one end of the four telescopic rods is fixedly connected to the car, the four telescopic rods are sleeved with a first buffer spring, the two ends of the first buffer spring are respectively fixedly connected to the car and the buffer plate, the three buffer plates are fixedly connected with four mounting seats, the bottom ends of the four mounting seats are slidably connected with an L-shaped block, the L-shaped block and the mounting seat are jointly fixedly connected with a connecting spring, one end of each two L-shaped blocks is jointly fixedly connected with a fixed column, the three side inner walls of the car are fixedly connected to two fixed blocks, the tops of the two fixed blocks are fixedly connected with a first protrusion, a second protrusion and a third protrusion, and the two fixed columns are respectively in contact with the tops of the two fixed blocks.

[0014] Preferably, the alarm unit includes a fixed seat fixedly connected to the inner walls of the three sides of the car respectively, a movable column is slidably connected to the fixed seat, a pressure sensor is fixedly connected to the fixed seat, and a mounting spring is fixedly connected to both the pressure sensor and the movable column.

[0015] Preferably, a controller is fixedly connected to the car, and alarms are fixedly connected to the inner walls of the three sides of the car, and the three alarms are electrically connected to the controller.

[0016] Preferably, the inner walls on three sides of the car are slidably connected with four sliding rods, and every two sliding rods are fixedly connected with a fixing bar. The four sliding rods are all sleeved with a second buffer spring, and the two ends of the second buffer spring are fixedly connected to the car and the fixing bar respectively.

[0017] Preferably, two adjacent buffer plates are slidably connected to each other with an L-shaped plate, and both ends of the two L-shaped plates are fixedly connected to a group of fixed springs, wherein one end of the two groups of fixed springs are respectively fixedly connected to the two ends of one of the buffer plates, and one end of the other two groups of fixed springs are respectively fixedly connected to one end of the other two buffer plates.

[0018] The present invention provides an improved freight elevator car wall anti-collision device, which has the following improvements and advantages compared with the prior art:

[0019] First: The present invention sets up a convenient and detachable unit and utilizes the principle that like poles of magnets repel each other. The magnet is attached to the buffer plate in the direction of the magnetic block, so that the magnet drives the magnetic block and the extrusion block to move. The movement of the magnetic block drives the elastic sheet to be compressed and elastically deformed. The extrusion block drives the L-shaped slider and the latch to move upward, so that the latch moves away from the slot, and the extrusion spring drives the movable rod and the rotating plate to move, so that the rotating plate moves out of the installation slot. At this time, according to the collision situation of the rotating plate, the rotating plate can be flipped and replaced. The large plate is designed to be divided into multiple replaceable small plates, and the small plates can be flipped, thereby achieving the effect of quick replacement and effectively reducing the cost of damage.

[0020] Secondly, the present invention sets a limiting unit, so that when the rotating plate to be replaced is installed, the fixed shaft squeezes the inclined piece to drive the movable block to move, and the movement of the movable block drives the telescopic spring to compress and elastically deform. When the fixed shaft contacts the bottom of the card slot, the telescopic spring drives the movable block and the card block to move, so that the card block enters one of the limiting slots, thereby improving the stability of the rotating plate.

[0021] Third: The present invention provides a buffer unit. When the rotating plate is hit, the rotating plate drives the buffer plate to move, and the buffer plate drives the telescopic rod to contract, while squeezing the first buffer spring to compress and elastically deform. The movement of the buffer plate drives the mounting seat, the L-shaped block and the fixed column to move, so that when the fixed column moves to the first protrusion, the second protrusion and the third protrusion, it will squeeze the fixed column and the L-shaped block to move upward. The movement of the L-shaped block drives the connecting spring to compress and elastically deform. Since the slopes of the first protrusion, the second protrusion and the third protrusion increase successively, the damping effect gradually increases, thereby improving the buffering effect.

[0022] Fourthly, the present invention sets a buffer mechanism. When the fixed column moves on the third protrusion, the L-shaped block moves upward to drive the movable column to move. The movement of the movable column drives the installation spring to compress and elastically deform, thereby triggering the pressure sensor. The pressure sensor sends the pressure signal to the controller via a wireless signal, so that the controller activates the alarm to sound an alarm. At the same time, the buffer plate contacts the fixed bar and drives the fixed bar to squeeze the second buffer spring to compress and elastically deform, thereby achieving buffer protection when the impact force is small. When the impact force is large, an alarm will be issued and secondary protection will be triggered at the same time, so that the incidents of damage to the elevator car wall are effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the buffer plate and the rotating plate in the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the disassembly and assembly mechanism and the buffer mechanism in the present invention;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the detachable unit in the present invention;

[0028] Figure 5 Schematic diagram of the internal cross-sectional planar structure of the fixed rod and the movable rod in the present invention;

[0029] Figure 6 Schematic diagram of the cross-sectional planar structure of the magnetic block, the extrusion block and the L-shaped slider in the present invention;

[0030] Figure 7 Schematic diagram of the three-dimensional structure of the buffer unit in the present invention;

[0031] Figure 8 Schematic diagram of the internal cross-sectional plan structure of the mounting seat and the fixing seat in the present invention;

[0032] Figure 9 It is a schematic diagram of the cross-sectional planar structure of the buffer plate and the L-shaped plate in the present invention.

[0033] Reference numerals:

[0034] 1. Car; 11. Buffer plate; 12. Telescopic rod; 13. First buffer spring; 14. Mounting slot; 15. Fixed rod; 16. Movable rod; 17. Extrusion spring; 18. Slot; 19. Fixed shaft; 110. Rotating plate; 2. Latch; 21. L-shaped slider; 22. Return spring; 23. Fixed sleeve; 24. Slot; 25. Extrusion block; 26. Magnetic block; 27. Shrapnel; 28. Fixed slot; 3. Movable block; 31. Telescopic spring ; 32. Bevel; 33. Block; 4. Mounting seat; 41. Connecting spring; 42. L-shaped block; 43. Fixed column; 44. Fixed block; 45. First protrusion; 46. Second protrusion; 47. Third protrusion; 48. Fixed seat; 49. Movable column; 410. Mounting spring; 411. Pressure sensor; 5. Controller; 6. Alarm; 7. L-shaped plate; 71. Fixed spring; 8. Sliding rod; 81. Fixed bar; 82. Second buffer spring. DETAILED DESCRIPTION

[0035] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] The present invention provides an improved freight elevator car wall anti-collision device. The technical solution of the present invention is:

[0037] like Figures 1 to 9 As shown, an embodiment of the present invention provides a freight elevator car wall anti-collision device, including a car 1, wherein buffer plates 11 are provided on the inner walls of three sides of the car 1, and multiple mounting grooves 14 are formed on the three buffer plates 11. A rotating plate 110 is provided on one side of the three buffer plates 11, and the multiple rotating plates 110 are respectively adapted to the multiple mounting grooves 14, and further comprising:

[0038] The disassembly and assembly mechanism is located on the buffer plate 11;

[0039] A buffer mechanism is located on the car 1;

[0040] The disassembly and assembly mechanism includes a disassembly unit and a limiting unit. The disassembly unit includes multiple pairs of fixed rods 15 respectively fixedly connected to the three buffer plates 11. Each pair of fixed rods 15 is slidably connected to a movable rod 16. One end of the two movable rods 16 is provided with a card slot 18. Both sides of the rotating plate 110 are fixedly connected to a fixed shaft 19. The two fixed shafts 19 are respectively located in the two card slots 18. The two fixed rods 15 and the two movable rods 16 are fixedly connected to an extrusion spring 17. The two fixed rods 15 are slidably connected to a latch 2. The two latches 2 The top of each of the movable rods 16 is fixedly connected to an L-shaped slider 21, and the two fixed rods 15 are fixedly connected to a fixed sleeve block 23. The two L-shaped sliders 21 are slidably connected to the two fixed sleeve blocks 23. The tops of the two movable rods 16 are provided with slots 24, and the two slots 24 are respectively adapted to the two latches 2. The two latches 2 are sleeved with return springs 22, and the two ends of the two return springs 22 are respectively fixedly connected to the fixed rod 15 and the L-shaped slider 21. The three buffer plates 11 are provided with multiple pairs of fixed grooves 28, and a pair of fixed grooves 28 are slidably connected. The two extrusion blocks 25 are respectively located below the two L-shaped sliders 21. One end of the two extrusion blocks 25 is fixedly connected to a magnetic block 26. The two magnetic blocks 26 are respectively slidably connected to the two fixed grooves 28. The two magnetic blocks 26 are fixedly connected to a spring 27. One end of the two springs 27 is fixedly connected to the buffer plate 11. By setting the detachable unit and utilizing the principle of magnet repulsion of like poles, the position of the magnet facing the magnetic block 26 is attached to the buffer plate 11, so that the magnet drives the magnetic block 26 and the extrusion block 25 to move. The movement of block 26 drives the elastic piece 27 to be compressed and elastically deformed, and the extrusion block 25 drives the L-shaped slider 21 and the pin 2 to move upward, so that the pin 2 is away from the slot 24, so that the extrusion spring 17 drives the movable rod 16 and the rotating plate 110 to move, so that the rotating plate 110 moves out of the installation slot 14. At this time, according to the collision situation of the rotating plate 110, the rotating plate 110 can be flipped and replaced. The large plate is designed into multiple replaceable small plates, and the small plates can be flipped, which achieves the effect of quick replacement and effectively reduces the cost of damage.

[0041] Furthermore, the limiting unit includes movable grooves respectively provided on the inner walls of one side of the plurality of slots 18, wherein a movable block 3 is slidably connected in the movable groove, one end of the movable block 3 is in contact with the fixed shaft 19, and a telescopic spring 31 is provided in the movable groove, the two ends of the telescopic spring 31 are respectively fixedly connected to the movable block 3 and the movable rod 16, and the top of one end of the movable block 3 is fixedly connected with an inclined piece 32; through the setting of the limiting unit, when the rotating plate 110 to be replaced is installed, the fixed shaft 19 squeezes the inclined piece 32 to drive the movable block 3 to move, and the movement of the movable block 3 drives the telescopic spring 31 to be compressed and elastically deformed. When the fixed shaft 19 contacts the bottom of the slot 18, the telescopic spring 31 drives the movable block 3 to move, so that the movable block 3 fits with the fixed shaft 19, thereby realizing the limiting of the rotating plate 110.

[0042] Furthermore, one end of the movable block 3 is fixedly connected to a clamping block 33, and two limiting grooves are provided in the circumferential direction of the fixed shaft 19, and the clamping block 33 is located in one of the limiting grooves; through the setting of the clamping block 33, with the cooperation of the clamping block 33 and the limiting groove, the stability of the rotating plate 110 is improved.

[0043] Furthermore, the buffer mechanism includes a buffer unit and an alarm unit. The buffer unit includes four telescopic rods 12 respectively fixedly connected to the three buffer plates 11, one end of the four telescopic rods 12 is fixedly connected to the car 1, and the four telescopic rods 12 are each sleeved with a first buffer spring 13. The two ends of the first buffer spring 13 are respectively fixedly connected to the car 1 and the buffer plate 11, and the three buffer plates 11 are each fixedly connected to four mounting seats 4. The bottom ends of the four mounting seats 4 are slidably connected to an L-shaped block 42, and the L-shaped block 42 and the mounting seat 4 are jointly fixedly connected with a connecting spring 41. One end of each two L-shaped blocks 42 is jointly fixedly connected to a fixed column 43, and the inner walls of the three sides of the car 1 are fixedly connected to two fixed blocks 44, and the tops of the two fixed blocks 44 are fixedly connected to a first protrusion 45, a second protrusion 46 and a third protrusion 47. There are three protrusions 47, and the two fixed columns 43 are in contact with the tops of the two fixed blocks 44 respectively; through the setting of the buffer unit, when the rotating plate 110 is collided, the rotating plate 110 drives the buffer plate 11 to move, and the buffer plate 11 drives the telescopic rod 12 to contract, while squeezing the first buffer spring 13 to compress and elastically deform. The movement of the buffer plate 11 drives the mounting seat 4, the L-shaped block 42 and the fixed column 43 to move, so that when the fixed column 43 moves to the first protrusion 45, the second protrusion 46 and the third protrusion 47, it will squeeze the fixed column 43 and the L-shaped block 42 to move upward, and the movement of the L-shaped block 42 drives the connecting spring 41 to compress and elastically deform. Since the slopes of the first protrusion 45, the second protrusion 46 and the third protrusion 47 increase successively, the damping effect gradually increases, thereby improving the buffering effect.

[0044] Furthermore, the alarm unit includes a fixed seat 48 respectively fixedly connected to the inner walls of the three sides of the car 1, a movable column 49 is slidably connected to the fixed seat 48, a pressure sensor 411 is fixedly connected to the fixed seat 48, the pressure sensor 411 and the movable column 49 are jointly fixedly connected with the installation spring 410, the car 1 is fixedly connected with a controller 5, and the three inner walls of the car 1 are fixedly connected with alarms 6, and the three alarms 6 are electrically connected to the controller 5; through the setting of the alarm unit, when the fixed column 43 moves on the third protrusion 47, the L-shaped block 42 moves upward to drive the movable column 49 to move, and the movement of the movable column 49 drives the installation spring 410 to be compressed and elastically deformed, thereby triggering the pressure sensor 411, so that the pressure sensor 411 sends the pressure signal to the controller 5 via a wireless signal, so that the controller 5 starts the alarm 6 to alarm, which serves as a warning.

[0045] Furthermore, the inner walls of the three sides of the car 1 are slidably connected with four sliding rods 8, and every two sliding rods 8 are fixedly connected with a fixed bar 81. The four sliding rods 8 are all sleeved with a second buffer spring 82, and the two ends of the second buffer spring 82 are fixedly connected to the car 1 and the fixed bar 81 respectively; through the setting of the second buffer spring 82, when the alarm is sounded, the buffer plate 11 contacts the fixed bar 81, and drives the fixed bar 81 to squeeze the second buffer spring 82 to compress and elastically deform, thereby realizing secondary buffering, improving the protection effect of the elevator car wall, and effectively reducing the incidents of damage to the elevator car wall.

[0046] Furthermore, two adjacent buffer plates 11 are slidingly connected with an L-shaped plate 7, and both ends of the two L-shaped plates 7 are fixedly connected with a group of fixed springs 71, wherein one end of the two groups of fixed springs 71 are respectively fixedly connected to the two ends of one of the buffer plates 11, and one end of the other two groups of fixed springs 71 are respectively fixedly connected to one end of the other two buffer plates 11; through the setting of the L-shaped plate 7, with the cooperation of the L-shaped plate 7 and the fixed spring 71, the three-sided protective plates of the car 1 form a whole and do not affect each other.

[0047] Specific implementation steps: Push the rotating plate 110 into the installation slot 14, and the movement of the rotating plate 110 drives the movable rod 16 to move through the fixed shaft 19, and the movable rod 16 moves to resist the extrusion spring 17 and elastically deform. When the slot 24 moves to the bottom of the latch 2, the rotating plate 110 enters the installation slot 14. Since the return spring 22 is in a stretched state, the return spring 22 drives the latch 2 to reset and enter the slot 24, thereby fixing the rotating plate 110. When the rotating plate 110 is collided, the rotating plate 110 drives the buffer plate 11 to move, and the buffer plate 11 drives the telescopic rod 12 to contract, and at the same time squeezes the first buffer spring 13 to compress and elastically deform. The movement of the buffer plate 11 drives the mounting seat 4, the L-shaped block 42 and the fixed column 43 to move, so that when the fixed column 43 moves to the first protrusion 45, the second protrusion 46 and the third protrusion 47, it squeezes the fixed column 43 and the L-shaped block 42 to move upward. The movement of the L-shaped block 42 drives the connecting spring 41 to be compressed and elastically deformed. Since the slopes of the first protrusion 45, the second protrusion 46 and the third protrusion 47 increase successively, the damping effect gradually increases, thereby improving the buffering effect. When the fixed column 43 moves on the third protrusion 47, the L-shaped block 42 moves upward to drive the movable column 49 to move. The movement of the movable column 49 drives the installation spring 410 to be compressed and elastically deformed, thereby triggering the pressure sensor 411, so that the pressure sensor 411 sends a pressure signal to the controller 5 via a wireless signal, so that the controller 5 activates the alarm 6 to alarm. At the same time, the buffer plate 11 contacts the fixed bar 81 and drives the fixed bar 81 to squeeze the second buffer spring 82 to be compressed and elastically deformed, so that when the impact force is small, buffer protection can be performed. When the impact force is large, an alarm will be sounded and the secondary protection will be triggered at the same time, so that the event of damage to the elevator car wall is effectively reduced.When the outer surface of the rotating plate 110 is deformed by the collision, the principle of magnets with like poles repel each other is used to attach the position of the magnet facing the magnetic block 26 to the buffer plate 11, so that the magnet drives the magnetic block 26 and the extrusion block 25 to move, and the movement of the magnetic block 26 drives the elastic piece 27 to be compressed and elastically deformed, and the extrusion block 25 drives the L-shaped slider 21 and the latch 2 to move upward, so that the latch 2 is away from the slot 24, so that the extrusion spring 17 drives the movable rod 16 and the rotating plate 110 to move, so that the rotating plate 110 moves out of the installation slot 14, and then the rotating plate 110 is turned 180 degrees, so that the block 33 enters another limit slot on the fixed shaft 19, so that the deformed surface of the rotating plate 110 can be further adjusted. When both sides of the rotating plate 110 are hit, the rotating plate 110 is pulled to move the fixed shaft 19 out of the slot 18. When the rotating plate 110 to be replaced is installed, the fixed shaft 19 squeezes the inclined piece 32 to move the movable block 3. The movement of the movable block 3 compresses the telescopic spring 31 and elastically deforms it. When the fixed shaft 19 contacts the bottom of the slot 18, the telescopic spring 31 drives the movable block 3 and the clamping block 33 to move, so that the clamping block 33 enters one of the limit slots. The rotating plate 110 is then pushed into the installation slot 14. The large plate is designed to be divided into multiple replaceable small plates, and the small plates can be flipped, achieving the effect of rapid replacement and effectively reducing the cost of damage.

[0048] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A freight elevator car wall anti-collision device, comprising a car (1), characterized in that: The inner walls of the three sides of the car (1) are each provided with a buffer plate (11), a plurality of mounting grooves (14) are each provided on the three buffer plates (11), a rotating plate (110) is provided on one side of the three buffer plates (11), and the plurality of rotating plates (110) are respectively adapted to the plurality of mounting grooves (14), and further comprising: a disassembly and assembly mechanism, the disassembly and assembly mechanism being located on the buffer plate (11); A buffer mechanism, the buffer mechanism being located on the car (1); The disassembly mechanism includes a convenient disassembly unit and a limiting unit. The convenient disassembly unit includes a plurality of pairs of fixed rods (15) respectively fixedly connected to the three buffer plates (11). Each pair of fixed rods (15) is slidably connected to a movable rod (16). One end of each of the two movable rods (16) is provided with a slot (18). Both sides of the rotating plate (110) are fixedly connected to fixed shafts (19). The two fixed shafts (19) are respectively located in the two slots (18). The two fixed rods (15) and the two movable rods (16) are fixedly connected to an extrusion spring (17). The two fixed rods (15) are slidably connected to a latch (2). The top ends of the two latches (2) are fixedly connected to an L-shaped slider (21). The two fixed rods (15) are fixedly connected to a fixed sleeve (23). The two L-shaped sliders (21) are slidably connected to the two fixed sleeves (23). The top of each movable rod (16) is provided with a slot (24), and the two slots (24) are respectively adapted to the two latches (2), and the two latches (2) are respectively sleeved with a return spring (22), and the two ends of the two return springs (22) are respectively fixedly connected to the fixed rod (15) and the L-shaped slider (21), and the three buffer plates (11) are provided with multiple pairs of fixed slots (28), and a pair of the fixed slots (28) is slidably connected with an extrusion block (25), and the two extrusion blocks (25) are respectively located below the two L-shaped sliders (21), and one end of each extrusion block (25) is fixedly connected with a magnetic block (26), and the two magnetic blocks (26) are respectively slidably connected in the two fixed slots (28), and the two magnetic blocks (26) are fixedly connected with a spring (27), and one end of each spring (27) is fixedly connected to the buffer plate (11).

2. The anti-collision device for a freight elevator car wall according to claim 1, characterized in that: The limiting unit comprises movable grooves respectively opened on the inner walls of one side of the plurality of the card slots (18), a movable block (3) is slidably connected in the movable groove, one end of the movable block (3) is in contact with the fixed shaft (19), a telescopic spring (31) is provided in the movable groove, two ends of the telescopic spring (31) are respectively fixedly connected to the movable block (3) and the movable rod (16), and an inclined piece (32) is fixedly connected to the top of one end of the movable block (3).

3. The anti-collision device for a freight elevator car wall according to claim 2, characterized in that: One end of the movable block (3) is fixedly connected to a clamping block (33), and two limiting grooves are provided in the circumferential direction of the fixed shaft (19), and the clamping block (33) is located in one of the limiting grooves.

4. The anti-collision device for a freight elevator car wall according to claim 3, characterized in that: The buffer mechanism includes a buffer unit and an alarm unit. The buffer unit includes four telescopic rods (12) respectively fixedly connected to the three buffer plates (11). One end of each of the four telescopic rods (12) is fixedly connected to the car (1). A first buffer spring (13) is sleeved on each of the four telescopic rods (12). Both ends of the first buffer spring (13) are respectively fixedly connected to the car (1) and the buffer plate (11). Four mounting seats (4) are fixedly connected to the three buffer plates (11). The four mounting seats (4) The bottom ends of the two fixing blocks (44) are slidably connected to an L-shaped block (42), the L-shaped block (42) and the mounting seat (4) are fixedly connected to a connecting spring (41), one end of each of the two L-shaped blocks (42) is fixedly connected to a fixing column (43), the inner walls of the three sides of the car (1) are fixedly connected to two fixing blocks (44), the tops of the two fixing blocks (44) are fixedly connected to a first protrusion (45), a second protrusion (46) and a third protrusion (47), and the two fixing columns (43) are in contact with the tops of the two fixing blocks (44) respectively.

5. The anti-collision device for a freight elevator car wall according to claim 4, characterized in that: The alarm unit comprises a fixed seat (48) fixedly connected to the inner walls of three sides of the car (1), a movable column (49) being slidably connected to the fixed seat (48), a pressure sensor (411) being fixedly connected to the fixed seat (48), and a mounting spring (410) being fixedly connected to both the pressure sensor (411) and the movable column (49).

6. The anti-collision device for a freight elevator car wall according to claim 5, characterized in that: The car (1) is fixedly connected to a controller (5), and three inner walls of the car (1) are fixedly connected to alarms (6), and the three alarms (6) are all electrically connected to the controller (5).

7. The anti-collision device for a freight elevator car wall according to claim 6, characterized in that: The inner walls of the three sides of the car (1) are slidably connected to four sliding rods (8), and a fixing bar (81) is fixedly connected to every two of the sliding rods (8). A second buffer spring (82) is sleeved on each of the four sliding rods (8), and the two ends of the second buffer spring (82) are fixedly connected to the car (1) and the fixing bar (81).

8. The anti-collision device for a freight elevator car wall according to claim 7, characterized in that: An L-shaped plate (7) is slidably connected to two adjacent buffer plates (11), and a group of fixed springs (71) are fixedly connected to both ends of the two L-shaped plates (7), wherein one end of the two groups of fixed springs (71) is fixedly connected to both ends of one of the buffer plates (11), and one end of the other two groups of fixed springs (71) is fixedly connected to one end of the other two buffer plates (11).

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