Anti-falling mechanism and elevator

Abstract

The invention belongs to the technical field of workpiece storage and transportation, and discloses an anti-falling mechanism and a hoister, the anti-falling mechanism comprises a rack, a mounting seat, a tooth block and an elastic piece, and the rack is vertically arranged; a first guide structure which is inclined downwards from one end far away from the rack to one end close to the rack is arranged on the mounting seat; the tooth block is in guide connection with the first guide structure through the second guide structure; when the second guide structure is located at the lowest end of the first guide structure, the tooth block is meshed with the rack, and when the second guide structure is located at the highest end of the first guide structure, the tooth block is separated from the rack; the elastic piece is connected to the tooth block and the installation base so that the second guide structure can keep the trend of moving towards the lowest end of the first guide structure. The elevator comprises the anti-falling mechanism, and the arrangement of the anti-falling mechanism in the elevator reduces the possibility of rapid falling of the lifting basket, so that the lifting basket and a workpiece can be prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece warehousing and transportation, and particularly to a fall prevention mechanism and a hoist. Background Art

[0002] A stereoscopic warehouse effectively solves the pain points of large floor space occupation and difficult access for placing different types of workpieces in the past. A stereoscopic warehouse usually has a storage rack. In order to transfer workpieces to the storage rack, a stereoscopic warehouse usually further includes a hoist used in cooperation with the storage rack. The hoist includes a frame, a traction mechanism, and a basket. The basket is used to carry workpieces or a material tray containing workpieces. Under the action of the traction mechanism, the basket can move up and down on the frame, so as to lift the workpieces to different heights.

[0003] In the related art, the lifting mechanism includes a chain for pulling the basket up and down. Once the chain breaks, the basket will have a risk of rapid falling. In the light case, it will cause damage to the workpieces, and in the heavy case, it will cause safety accidents. Summary of the Invention

[0004] The purpose of the present invention is to provide a fall prevention mechanism and a hoist, which can solve the problem of the rapid falling of the basket when the traction mechanism for pulling the basket is disconnected from the basket.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A fall prevention mechanism includes a rack, a mounting seat, a tooth block, and an elastic member. The rack is vertically arranged; the mounting seat is provided with a first guiding structure that slopes downward from the end far away from the rack to the end close to the rack; the tooth block has a second guiding structure, and the plug block is guidingly connected to the first guiding structure through the second guiding structure; when the second guiding structure is at the lowest end of the first guiding structure, the tooth block meshes with the rack, and when the second guiding structure is at the highest end of the first guiding structure, the tooth block is separated from the rack; the elastic member is connected between the tooth block and the mounting seat to keep the second guiding structure moving towards the lowest end of the first guiding structure.

[0007] Optionally, a receiving groove is formed in the mounting seat, the tooth block is located in the receiving groove, the first guiding structure is arranged on the groove side wall of the receiving groove, and when the second guiding structure is at the lowest end of the first guiding structure, a part of the tooth block protrudes from the receiving groove.

[0008] Optionally, a first inclined surface with the same inclination direction and inclination angle as the first guiding structure is arranged in the receiving groove, and a second inclined surface with the same inclination direction and inclination angle as the first guiding structure is arranged on the bottom surface of the tooth block, and the first inclined surface abuts against the second inclined surface.

[0009] Optionally, the mounting seat is made of a metal part, and the first inclined surface is formed by cutting on the groove side wall of the accommodating groove.

[0010] Optionally, the lower wall surface of the teeth on the tooth block and the lower groove wall of the tooth grooves on the rack are both horizontally arranged.

[0011] A hoist, comprising a frame, a basket, a traction mechanism and the anti-falling mechanism according to any one of the above, the basket is arranged on the frame in a liftable manner, the rack is arranged on the frame, the mounting seat is connected to the basket, the tooth block is connected to the traction mechanism, and the traction mechanism is used for pulling the basket up and down.

[0012] Optionally, the traction mechanism includes a traction member and a traction driving member, the traction member is connected to the tooth block, the traction driving member provides traction power for the traction member, and the traction driving member is arranged at the bottom of the frame.

[0013] Optionally, the traction member is a traction chain, one end of the traction chain is connected to the tooth block, and the other end of the traction chain is connected to the mounting seat to form a closed-loop structure.

[0014] Optionally, the frame is arranged as a rectangular frame structure.

[0015] Optionally, the basket includes a mounting bracket and a sprocket transmission assembly, the sprocket transmission assembly includes a driving sprocket, a driven sprocket, a driving chain, a connection driving member and a material pulling hook, the driving sprocket and the driven sprocket are arranged on the mounting bracket at intervals for rotation, the connection driving member is connected to the driving sprocket, the driving chain is wound around the driving sprocket and the driven sprocket, and both ends of the driving chain are connected to the material pulling hook to form a closed loop, and the material pulling hook is used for hooking the material tray where the workpiece is located.

[0016] Advantages of the present invention: An anti-falling mechanism is added between the basket and the traction mechanism in the anti-falling mechanism and the hoist of the present invention. When the traction mechanism normally pulls the basket, under the action of the upward traction force, the second guiding structure is always located at the highest end of the first guiding structure, the tooth block retracts and does not engage with the rack, and the basket fixedly connected to the mounting seat can be lifted and lowered normally; and when the connection between the traction mechanism and the basket is disconnected, the second guiding structure that loses the upward traction force moves towards the lowest end of the first guiding structure under the action of the elastic member, the tooth block protrudes from the mounting seat and engages with the rack, so that the basket can be locked in the current position, reducing the risk of the basket falling rapidly, and thus reducing the possibility of damage to the workpiece or the basket. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the hoist in the embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the traction mechanism and the anti-falling mechanism in an embodiment of the present invention;

[0019] Figure 3 is Figure 2 an enlarged schematic diagram of part A in

[0020] Figure 4 It is a schematic structural diagram of the anti-falling mechanism in an embodiment of the present invention;

[0021] Figure 5 It is an exploded structural diagram of the anti-falling mechanism in an embodiment of the present invention;

[0022] Figure 6 It is a schematic structural diagram of the frame in an embodiment of the present invention;

[0023] Figure 7 It is a partial structural schematic diagram of the hanging basket in an embodiment of the present invention;

[0024] Figure 8 It is a schematic structural diagram of the sprocket transmission assembly in an embodiment of the present invention;

[0025] Figure 9 It is an exploded structural diagram of the material pulling hook and the driving chain in an embodiment of the present invention;

[0026] Figure 10 It is a schematic structural diagram of the guiding assembly in an embodiment of the present invention;

[0027] Figure 11 It is a schematic structural diagram of the buffer mechanism in an embodiment of the present invention.

[0028] In the figure:

[0029] 10. Hanging basket; 11. Mounting bracket; 12. Sprocket transmission assembly; 121. Driving chain; 122. Connecting driving part; 123. Material pulling hook; 1231. Connecting part; 1232. Hooking part; 1233. Hook groove; 124. Second proximity sensor; 125. Driving sprocket; 126. Driven sprocket; 127. Tensioning wheel; 13. Support assembly; 131. Roller seat; 132. Roller; 14. Guiding assembly; 141. Sliding seat; 142. First guiding wheel; 143. Second guiding wheel;

[0030] 20. Anti-falling mechanism; 21. Mounting seat; 211. First guiding structure; 212. Accommodating groove; 213. First inclined surface; 22. Tooth block; 221. Second inclined surface; 222. Second guiding structure; 23. Rack; 24. Elastic part;

[0031] 30. Frame; 31. Bottom cross beam; 32. Top cross beam; 33. Column;

[0032] 40. Traction mechanism; 41. Traction member; 42. Traction drive member; 43. Driving sprocket; 44. Reversing sprocket; 45. Transmission sprocket; 46. Fixed seat; 47. Main shaft; 48. First proximity sensor;

[0033] 50. Buffer mechanism; 51. Buffer frame; 52. Buffer. Detailed implementation mode

[0034] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of convenience of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0035] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0037] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] Reference Figures 1 - 11As shown in the figure, in an embodiment of the present invention, an anti-falling mechanism 20 and a hoist are proposed. The hoist includes a frame 30, a basket 10, a traction mechanism 40, and the above anti-falling mechanism 20. Among them, the basket 10 is disposed on the frame 30 in a liftable manner, the traction mechanism 40 is used to traction the basket 10 to lift and lower, the anti-falling mechanism 20 is connected between the basket 10 and the traction mechanism 40. The anti-falling mechanism 20 includes a mounting seat 21, a tooth block 22, an elastic member 24, and a rack 23. The rack 23 is disposed on the frame 30 in the vertical direction. The mounting seat 21 is fixed on the basket 10. A first guiding structure 211 that is inclined downward from the end far away from the rack 23 to the end close to the rack 23 is further disposed on the mounting seat 21. The tooth block 22 is connected to the traction mechanism 40 and is guidingly connected to the first guiding structure 211 through a second guiding structure 222 disposed on the tooth block 22. When the second guiding structure 222 is located at the lowest end of the first guiding structure 211, the tooth block 22 protrudes from the side of the mounting seat 21 close to the rack 23 and meshes with the rack 23. When the second guiding structure 222 is located at the highest end of the first guiding structure 211, the tooth block 22 is separated from the rack 23. The elastic member 24 is connected between the tooth block 22 and the mounting seat 21 and provides an elastic force to the tooth block 22 to make the second guiding structure 222 maintain a tendency to move toward the lowest end of the first guiding structure 211.

[0039] The above hoist adds an anti-falling mechanism 20 between the basket 10 and the traction mechanism 40. When the traction mechanism 40 normally tractions the basket 10, under the action of the upward traction force, the second guiding structure 222 is always located at the highest end of the first guiding structure 211, the tooth block 22 retracts and does not mesh with the rack 23, and the basket 10 fixedly connected to the mounting seat 21 can be lifted and lowered normally. When the connection between the traction mechanism 40 and the basket 10 is disconnected, the second guiding structure 222 that loses the upward traction force moves toward the lowest end of the first guiding structure 211 under the action of the elastic member 24, and the tooth block 22 protrudes from the mounting seat 21 and meshes with the rack 23, so that the basket 10 can be locked in the current position, reducing the risk of the basket 10 falling rapidly, and thus reducing the possibility of damage to the workpiece or the basket 10. It can be understood that the above anti-falling mechanism 20 can also be used in other lifting devices such as lifting tools.

[0040] Specifically, refer to Figure 4 and Figure 5As shown, a receiving groove 212 is formed in the mounting base 21. The tooth block 22 is located in the receiving groove 212, and the first guiding structure 211 is arranged on the groove side wall of the receiving groove 212. In this embodiment, the first guiding structure 211 is a guiding hole, and the second guiding structure 222 is a guiding rod. Guiding holes are arranged on the two relatively arranged groove side walls of the receiving groove 212. The guiding rod slidably passes through the guiding hole, and both ends of the guiding rod pass through the guiding hole. The elastic member 24 is a spring and there are two of them. The two springs are respectively connected to the two ends of the guiding rod in the length direction to provide sufficient elastic force. The mounting base 21 is made of a metal part with relatively high strength to provide sufficient supporting force for the tooth block 22. In other embodiments, the first guiding structure 211 is a guide rail, and the second guiding structure 222 is a slider slidably matched with the guide rail, or the first guiding structure 211 is a guide rail, and the second guiding structure 222 is a roller rollingly matched with the guide rail. That is, the guiding connection can be either a rolling connection or a sliding connection, which will not be elaborated here.

[0041] To prevent the tooth block 22 from rotating around the guiding rod in the receiving groove 212, which may affect the anti-falling effect of the anti-falling mechanism 20 or interfere with the normal lifting and lowering of the hanging basket 10, the cross-section of the guiding rod is set as a rectangle, or, referring to Figure 5 As shown, a first inclined surface 213 consistent with the inclination direction and inclination angle of the first guiding structure 211 is arranged in the receiving groove 212. At the same time, a second inclined surface 221 consistent with the inclination direction and inclination angle of the first guiding structure 211 is also arranged on the lower surface of the tooth block 22. The first inclined surface 213 abuts against the second inclined surface 221. The first inclined surface 213 and the second inclined surface 221 cooperate with each other to limit the rotation of the tooth block 22.

[0042] More specifically, the mounting base 21 is set as a U shape, including a first side wall, a second side wall and a bottom wall. The first side wall and the second side wall are both provided with guiding holes. The bottom wall connects the first side wall and the second side wall to enclose and form the receiving groove 212. Based on the premise that the mounting base 21 is a metal part, the first inclined surface 213 is formed by cutting on the inner sides of the first side wall and the second side wall to reduce the processing difficulty of the first inclined surface 213.

[0043] To improve the stability when the tooth block 22 meshes with the rack 23 and reduce the elastic coefficient of the required elastic member 24, the lower groove wall of the tooth groove on the rack 23 and the lower wall surface of the tooth on the tooth block 22 are both horizontally arranged. Then, when the tooth block 22 meshes with the rack 23, it will not be subjected to the reaction force in the horizontal direction of the rack 23, and the locking effect between the tooth block 22 and the rack 23 is better.

[0044] Referring to Figure 2As shown, the traction mechanism 40 includes a traction member 41 and a traction drive member 42. The traction member 41 is connected to the tooth block 22, and the traction drive member 42 provides traction power for the traction member 41. In this embodiment, the traction member 41 is a traction chain. One end of the traction chain is connected to the tooth block 22 through an upper pull rod, and the other end of the traction chain is connected to the mounting base 21 through a lower pull rod. Thus, the traction chain forms a closed loop. The traction mechanism 40 further includes a drive sprocket 43 and a reversing sprocket 44. Both the drive sprocket 43 and the reversing sprocket 44 are rotatably arranged on the frame 30. The traction drive member 42 is connected to the drive sprocket 43, and the traction chain is wound around the drive sprocket 43 and the reversing sprocket 44. In other embodiments, the traction mechanism 40 can also adopt an electric winch arranged on the top of the frame 30. The electric winch belongs to the prior art and will not be elaborated here.

[0045] Specifically, the traction drive member 42 is a reduction motor. To facilitate the daily maintenance and repair of the reduction motor, the drive sprocket 43 is arranged at the bottom of the frame 30, and the reversing sprocket 44 is arranged at the top of the frame 30. Then, the reduction motor connected to the drive sprocket 43 is also located at the bottom of the frame 30, which is convenient for installation, daily maintenance and repair. Moreover, the traction drive member 42 arranged at the bottom of the frame 30 can avoid the risk of the frame 30 being top-heavy and bottom-light, improving the stability of the frame 30. More specifically, the traction drive member 42 is fixed to the bottom of the frame 30 through a fixing seat 46.

[0046] More specifically, the traction mechanism 40 further includes a transmission sprocket 45, a transmission chain and a main shaft 47. Transmission sprockets 45 are arranged on both the output shaft of the reduction motor and the main shaft 47. The transmission chain is wound between the transmission sprocket 45 on the reduction motor and the sprocket on the main shaft 47. Two drive sprockets 43 are arranged on the main shaft 47. Correspondingly, two reversing sprockets 44 and two traction chains are also arranged to synchronously lift the relative two sides of the basket 10 respectively, thereby improving the stability.

[0047] The traction mechanism 40 further includes a first proximity sensor 48 communicatively connected to the traction drive member 42. First proximity sensors 48 are arranged at both the upper and lower ends of the frame 30, used to monitor the height where the basket 10 is located, so as to timely control the basket 10 to stop when the basket 10 approaches the highest or lowest end of the frame 30, avoiding the basket 10 from colliding with the frame 30.

[0048] Reference Figure 1 and Figure 6As shown, the frame 30 is integrally set as a rectangular frame structure. The frame 30 includes a bottom cross beam 31, a top cross beam 32 and columns 33. There are two columns 33. The bottom cross beam 31 connects the bottom ends of the two columns 33, and the top cross beam 32 connects the tops of the two columns 33 to form a rectangular frame structure. Compared with the gantry, the setting of the bottom cross beam 31 further improves the overall stability of the frame 30, and avoids the positioning deviation between the columns 33, reducing the installation difficulty of the columns 33 and the possibility of the frame 30 shaking.

[0049] Reference Figures 7 - 10 As shown, the basket 10 includes a mounting bracket 11 and a sprocket drive assembly 12. The sprocket drive assembly 12 is arranged on the mounting bracket 11. The sprocket drive assembly 12 includes a driving sprocket 125, a driven sprocket 126, a driving chain 121, a connection driving member 122 and a material pulling hook 123. The driving sprocket 125 and the driven sprocket 126 are respectively and rotatably arranged on the mounting bracket 11 at intervals along a first horizontal direction ( Figure 1 and Figure 7 the X direction in [the figure], that is, the direction of material transmission). The connection driving member 122 is connected to the driving sprocket 125 to drive the driving sprocket 125 to rotate. The driving chain 121 is wound around the driving sprocket 125 and the driven sprocket 126. Both ends of the driving chain 121 are connected to the material pulling hook 123 to form a closed loop. The material pulling hook 123 can pull the material tray by engaging with a limiting groove provided on the material tray where the workpiece is located.

[0050] The driving chain 121 in the above-mentioned basket 10 can reciprocate along the first direction under the action of the connection driving member 122. When the material pulling hook 123 moves to one side of the initial position where the material tray is located along with the driving chain 121 and the basket 10 rises, it can engage with the limiting groove on the material tray, and then pull the material tray to move away from the initial position to the target position along with the driving chain 121 until the material tray is transferred to the target position. Then the basket 10 descends, and the material pulling hook 123 can be disengaged from the material tray. It can be understood that this process can either be the process of transferring the material tray from the hoist to the storage rack for storing workpieces using the basket 10, or the process of taking the workpiece off the storage rack. Through the setting of the sprocket drive assembly 12, the above-mentioned hoist basket 10 can pick up and place workpieces on storage racks with non-powered connection structures or storage racks with powered connection structures, making the adaptability and compatibility of the hoist higher. Moreover, by connecting both ends of the driving chain 121 with the material pulling hook 123, it is equivalent to saving one driving chain link of the driving chain 121, the structure is more compact, the connection between the material pulling hook 123 and the driving chain 121 is closer, and the structural strength is higher.

[0051] Reference Figure 9As shown, in this embodiment, the material pulling hook 123 includes a connecting portion 1231 and a hooking portion 1232. The connecting portion 1231 is connected to the driving chain 121. One end of the hooking portion 1232 is connected to the connecting portion 1231, and the other end extends along the first direction. A hook groove 1233 is formed at the end of the hooking portion 1232 away from the connecting portion 1231. The side groove wall of the hook groove 1233 away from the connecting portion 1231 serves as a claw that can cooperate with the limiting groove on the material tray to hook the material tray. The hooked material tray can contact the bottom of the hook groove 1233. Compared with directly setting the material pulling hook 123 as an L shape, it can reduce the inclination of the material tray on the premise of ensuring the connection strength between the material pulling hook 123 and the driving chain 121, and the workpieces on the material tray are not likely to slide on the material tray.

[0052] In order to further improve the connection stability between the material pulling hook 123 and the driving chain 121, the driving chain 121 adopts a double-row chain. Moreover, in order to make reasonable use of the space on the mounting bracket 11, two driven sprockets 126 are provided, which are respectively located on the opposite sides of the driving sprocket 125 along the first direction, and the connection driving member 122 connected to the driving sprocket 125 is located on the mounting bracket 11. Specifically, the sprocket transmission assembly further includes a tensioning wheel 127. Tensioning wheels 127 are provided on both opposite sides of the driving sprocket 125 along the first direction, and the tensioning wheels 127 and the driving sprocket 125 are respectively located on the inner and outer sides of the chain. The distance between the two tensioning wheels 127 in the first direction is adjustable, so as to adjust the tension of the driving chain 121.

[0053] Reference Figure 7 As shown, two sprocket transmission assemblies 12 are arranged at intervals along the second direction ( Figure 1 and Figure 7 the Y direction in the figure) on the mounting bracket 11 to improve the stability when transferring the material tray. Specifically, in order to improve the movement consistency of the two sprocket transmission assemblies 12, the driving sprockets 125 of the two sprocket transmission assemblies 12 are connected by the same rotating shaft. The connection driving member 122 can specifically adopt a servo motor, and the second direction is the horizontal direction perpendicular to the first direction.

[0054] In this embodiment, the sprocket drive assembly 12 also includes a second proximity sensor 124 that is communicatively connected to the docking drive member 122. The second proximity sensor 124 is used to monitor the position of the material pulling hook 123. The second proximity sensors 124 are arranged on both sides of the mounting bracket 11 along the first direction. The two second proximity sensors 124 correspond to the starting position and the end position of the material pulling hook 123, respectively. When one of the second proximity sensors 124 senses the material pulling hook 123, the docking drive member 122 drives the active sprocket 125 in reverse to move the drive chain 121 in the reverse direction. The starting position and the end position refer to the extreme positions where the material pulling hook 123 is located on the opposite sides of the drive chain 121 in the first direction. When the material pulling hook 123 is in one of the extreme positions, the center of gravity of the material tray can be completely transferred to the mounting bracket 1. When it is in the other extreme position, the center of gravity of the material tray can be completely transferred to the storage rack.

[0055] In order to further improve the stability of the material tray during transfer and reduce the load of the connecting drive member 122, the basket 10 also includes a support assembly 13. The support surface height of the support assembly 13 is consistent with the conveying surface height of the drive chain 121. When the material tray moves with the drive chain 121, it abuts against the support surface of the support assembly 13, and the support assembly 13 can play a role in supporting the material tray.

[0056] In this embodiment, the support assembly 13 includes a roller seat 131 and a roller 132. The roller seat 131 is fixedly arranged on the mounting bracket 11. A plurality of rollers 132 are arranged on the roller seat 131 to rotate at intervals along a first direction. The horizontal plane where the highest point of the roller 132 is located is the support surface to support the material tray. Since the roller 132 is in rolling contact with the material tray, the wear on the material tray is small and the service life of the material tray is long. Specifically, the roller 132 is arranged between the two sprocket drive assemblies 12. In other embodiments, the support assembly 13 can also be a support plate with a smooth surface, which will not be described in detail here.

[0057] refer to Figure 2 and Figure 10 As shown, the basket 10 further includes two guide assemblies 14, which are respectively disposed on both sides of the mounting bracket 11 along the second direction to improve the stability of the basket 10 when it is lifted or lowered. Figure 3 As shown, the guide assembly 14 includes a sliding seat 141 and a first guide wheel group, wherein the sliding seat 141 is fixedly set on the mounting bracket 11, and the mounting seat 21 is connected to the mounting bracket 11 through the sliding seat 141. Two groups of first guide wheel groups are rotatably set on the sliding seat 141 at intervals in the horizontal direction and form a clamping space for the frame 30 of the clamping hoist. Any first guide wheel group includes at least two first guide wheels 142 spaced apart in the vertical direction, and the third direction is the vertical direction.

[0058] Further, the sliding seat 141 further includes a second guide wheel 143. The second guide wheel 143 is disposed between two sets of first guide wheel groups, and the rotation axis of the second guide wheel 143 is perpendicular to the rotation axis of the first guide wheel 142. The second guide wheel 143 also makes rolling contact with the frame 30. Thus, the first guide wheel group and the second guide wheel 143 are respectively in contact with three sides of the frame 30, and the stability is higher. Specifically, two second guide wheels 143 are also spaced apart in the third direction. Exemplarily, the rotation axis of the first guide wheel 142 extends along the second direction, and the rotation axis of the second guide wheel 143 extends along the first direction.

[0059] Reference Figure 1 and Figure 11 As shown, the elevator further includes a buffer mechanism 50. The buffer mechanism 50 includes a buffer frame 51 and a buffer 52. The buffer frame 51 is spanned above the bottom cross beam 31 and is located below the basket 10. A plurality of buffers 52 are provided on the buffer frame 51 to slow down the descending speed of the basket 10 when it descends to the lowest position, thereby reducing the impact force and prolonging the service life of the basket 10.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Anti-fall mechanism, characterized in that: The anti-fall mechanism comprises: A rack (23), wherein the rack (23) is arranged vertically; A mounting seat (21), wherein the mounting seat (21) is provided with a first guide structure (211) which is inclined downward from an end away from the rack (23) to an end close to the rack (23); A tooth block (22), wherein the tooth block (22) has a second guide structure (222), and the tooth block (22) is connected to the first guide structure (211) through the second guide structure (222); when the second guide structure (222) is located at the lowest end of the first guide structure (211), the tooth block (22) is meshed with the rack (23); when the second guide structure (222) is located at the highest end of the first guide structure (211), the tooth block (22) is separated from the rack (23); An elastic member (24), wherein the elastic member (24) is connected to the tooth block (22) and the mounting seat (21) so as to enable the second guide structure (222) to maintain a tendency to move toward the lowest end of the first guide structure (211).

2. The anti-fall mechanism according to claim 1, characterized in that: The mounting seat (21) is provided with a receiving groove (212), the tooth block (22) is located in the receiving groove (212), the first guide structure (211) is arranged on the groove side wall of the receiving groove (212), and when the second guide structure (222) is located at the lowest end of the first guide structure (211), the tooth block (22) partially protrudes from the receiving groove (212).

3. The anti-fall mechanism according to claim 2, characterized in that: A first inclined surface (213) having the same inclined direction and inclined angle as the first guide structure (211) is arranged in the receiving groove (212); a second inclined surface (221) having the same inclined direction and inclined angle as the first guide structure (211) is arranged on the bottom surface of the tooth block (22); the first inclined surface (213) abuts against the second inclined surface (221).

4. The anti-fall mechanism according to claim 3, characterized in that: The mounting seat (21) is made of a metal piece, and the first inclined surface (213) is cut and formed on the groove side wall of the accommodating groove (212).

5. The anti-falling mechanism according to any one of claims 1 to 4, characterized in that: The lower wall surface of the teeth on the tooth block (22) and the lower groove wall of the tooth groove on the rack (23) are both arranged horizontally.

6. A hoist, characterized in that: The lifting machine comprises a frame (30), a lifting basket (10), a traction mechanism (40) and an anti-falling mechanism according to any one of claims 1 to 5, wherein the lifting basket (10) is movably arranged on the frame (30), the rack (23) is arranged on the frame (30), the mounting seat (21) is connected to the lifting basket (10), the tooth block (22) is connected to the traction mechanism (40), and the traction mechanism (40) is used to pull the lifting basket (10) up and down.

7. The lifting machine according to claim 6, characterized in that: The traction mechanism (40) comprises a traction member (41) and a traction drive member (42); the traction member (41) is connected to the tooth block (22); the traction drive member (42) provides traction power for the traction member (41); and the traction drive member (42) is arranged at the bottom of the frame (30).

8. The lifting machine according to claim 7, characterized in that: The traction member (41) is a traction chain, one end of the traction chain is connected to the tooth block (22), and the other end of the traction chain is connected to the mounting seat (21) to form a closed loop structure.

9. The lifting machine according to claim 6, characterized in that: The frame (30) is configured as a rectangular frame structure.

10. The lifting machine according to claim 6, characterized in that: The basket (10) comprises a mounting bracket (11) and a sprocket transmission assembly (12); the sprocket transmission assembly (12) comprises a driving sprocket (125), a driven sprocket (126), a driving chain (121), a connecting driving member (122) and a material pulling hook (123); the driving sprocket (125) and the driven sprocket (126) are arranged on the mounting bracket (11) in an interval and rotatable manner; the connecting driving member (122) is connected to the driving sprocket (125); the driving chain (121) is wound around the driving sprocket (125) and the driven sprocket (126); and both ends of the driving chain (121) are connected to the material pulling hook (123) to form a closed loop; the material pulling hook (123) is used to hook the material tray.

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