Anti-falling lifting device

Abstract

The invention aims to provide an anti-falling lifting device which solves the problem of product falling caused by accidental breakage of a synchronous belt in the lifting process, the anti-falling lifting device comprises a lifting assembly and an anti-falling assembly, the anti-falling assembly is arranged on the lifting assembly, the lifting assembly comprises a frame and the synchronous belt, the synchronous belt is rotationally arranged on the frame, and the anti-falling assembly is arranged on the frame. The bearing frame is arranged on the synchronous belt, and the bearing frame is used for bearing goods; the bearing frame is arranged on the frame in a sliding mode, and the bearing frame is used for bearing goods; when the synchronous belt rotates to lift the bearing frame, the proximity switch monitors the position of the lifting column, if the lifting column is not within the monitoring range of the proximity switch, the proximity switch sends a signal to the anti-falling air cylinder, the anti-falling air cylinder drives the anti-falling rod to move, the anti-falling rod falls on the anti-falling teeth, the anti-falling rod prevents the bearing frame from falling, and the bearing frame is supported by the anti-falling rod; therefore, the problem that the bearing frame is prone to falling in the lifting process is solved.

Description

Technical Field

[0001] The invention relates to the field of cargo lifting, and in particular to an anti-falling lifting device. Background Art

[0002] In the process of cargo handling, especially heavy loads, various accidents are prone to occur during the lifting process. For example, if the lifting equipment has poor stability, the heavily loaded cargo is prone to fall, or there is an electrical failure, especially a broken synchronous belt, then the cargo on the synchronous belt is prone to fall, causing damage to both the equipment and the cargo, and even causing injuries to the operator. Summary of the invention

[0003] The purpose of the present invention is to provide an anti-fall lifting device, which solves the problem of preventing the product from falling due to accidental breakage of a synchronous belt during the lifting process.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a fall prevention lifting device, comprising a lifting component and an anti-fall component, wherein the anti-fall component is arranged on the lifting component. The lifting assembly comprises a frame and a synchronous belt, wherein the synchronous belt is rotatably arranged on the frame, and the supporting frame is arranged on the synchronous belt, and the supporting frame is used to support the goods; The anti-falling assembly includes a lifting block, a lifting column, an anti-falling cylinder, a proximity switch, an anti-falling rod and a rack, the lifting block and the anti-falling cylinder are arranged on the support frame, the lifting column is arranged on the lifting block so as to be able to be lifted and lowered, and the lifting column is arranged on the synchronous belt; The anti-fall rod is movably arranged on the supporting frame, the anti-fall rod is connected to the driving end of the anti-fall cylinder, the rack is arranged on the frame, the rack is located on the moving path of the anti-fall rod, the rack is provided with anti-fall teeth, the anti-fall teeth and the anti-fall teeth have two states of clamping and separation, the proximity switch is used to monitor the position of the lifting column, and the proximity switch is connected with the anti-fall cylinder signal.

[0005] Optionally, the lifting assembly also includes a motor, a first synchronous shaft and a second synchronous shaft, the motor is arranged on the frame, the first synchronous shaft and the second synchronous shaft are respectively rotatably arranged at two ends of the frame, the first synchronous shaft is connected to the motor driving end, and the synchronous belt is sleeved on the first synchronous shaft and the second synchronous shaft.

[0006] Furthermore, the lifting assembly further includes a first synchronous wheel and a second synchronous wheel, the first synchronous wheel is arranged on the first synchronous shaft, the second synchronous wheel is arranged on the second synchronous shaft, and the synchronous belt is sleeved on the first synchronous wheel and the second synchronous wheel.

[0007] Optionally, the lifting assembly further comprises a first sliding bar and a second sliding bar, a counterweight block is slidably arranged on the first sliding bar and the second sliding bar, and the counterweight block is arranged on the synchronous belt.

[0008] Furthermore, the counterweight block and the supporting bracket are respectively located on both sides of the frame, and the lifting assembly also includes at least two rolling mechanisms, and the two rolling mechanisms are respectively in rolling contact with the first sliding rod and the second sliding rod.

[0009] Further, the rolling mechanism includes a base, a first roller, a second roller and a third roller, the first roller, the second roller and the third roller are rotatably arranged on the base, the first roller, the second roller and the third roller form a clamping area, and at least two clamping areas respectively roll and clamp the first slide bar and the second slide bar.

[0010] Optionally, the anti-fall assembly further includes a limiting bolt and a limiting plate, the limiting bolt and the limiting plate are arranged on the lifting block, the proximity switch is adjustably arranged on the limiting plate, and the lifting column is liftably arranged on the limiting bolt.

[0011] Furthermore, the anti-falling component also includes a guide rod and a spring, the guide rod is slidably arranged on the lifting block, the lifting column is arranged at the top end of the guide rod, the bottom end of the guide rod has an end head, the sleeve is arranged on the guide rod, and the two ends of the spring respectively abut the lifting block and the end head.

[0012] Optionally, the anti-falling assembly further includes a sensing bolt, which is disposed on the lifting column and is used to cooperate with the proximity switch.

[0013] Optionally, the anti-falling tooth has a plane and an inclined surface, the plane is located at the upper end of the anti-falling tooth, and the inclined surface is located at the lower end of the anti-falling tooth.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The anti-fall lifting device of the present invention has the advantages that when the synchronous belt rotates to lift the supporting bracket, the lifting block and the lifting column are lifted together, and the proximity switch monitors the position of the lifting column. If the lifting column is not within the monitoring range of the proximity switch, the proximity switch sends a signal to the anti-fall cylinder, and the anti-fall cylinder drives the anti-fall rod to move. The anti-fall rod is clamped between adjacent anti-fall teeth, and the anti-fall rod prevents the supporting bracket from falling. With the support of the anti-fall rod, the supporting bracket is not easy to fall, thereby solving the problem of preventing the synchronous belt from accidentally breaking and causing the product to fall during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings: Figure 1 is a three-dimensional view of a fall prevention lifting device according to a preferred embodiment of the present invention; Figure 2 yes Figure 1 Another perspective stereoscopic view is shown; Figure 3 It is a three-dimensional view of the support frame on the upper part of the frame; Figure 4 yes Figure 3 An enlarged view of part B is shown; Figure 5 It is a three-dimensional view of the fall prevention assembly on the support frame; Figure 6 It is a three-dimensional view of the counterweight at the bottom of the frame; Figure 7 yes Figure 6 An enlarged view of section A is shown; Figure 8 It is a three-dimensional view of the rolling mechanism on the counterweight; Fig. 9 A three-dimensional view of the partial structure of the fall prevention component; Fig.10 yes Fig. 9 A three-dimensional view of a partial structure of the anti-fall assembly from another perspective; Fig.11 Exploded view of part of the structure of the fall protection assembly; Fig.12 yes Figure 2 An enlarged view of section C is shown; Fig.13 It is a schematic diagram of the position of the positioning cylinder on the support frame; Fig.14 yes Fig.13 Schematic diagram from another perspective; Fig.15 Schematic diagram of the position of the positioning cylinder, positioning rod and guide; Fig.16 yes Figure 3 An enlarged view of section D is shown.

[0016] The reference numerals are described as follows: 1. Lifting assembly; 2. Anti-fall assembly; 3. Counterweight; 4. Rolling mechanism; 5. Buffer block; 6. Support bracket; 7. Positioning assembly; 8. Buffer column; 9. Connecting piece; 10. Guide shaft; 11. Frame; 12. Motor; 13. First synchronous shaft; 14. Second synchronous shaft; 15. Synchronous belt; 17. First synchronous wheel; 18. Second synchronous wheel; 19. First slide bar; 20. Second slide bar; 21. Lifting block; 22. Lifting column; 23. Anti-fall cylinder; 24. Proximity switch; 25. Anti-fall rod; 26. Rack; 27. Anti-fall tooth; 28, limit bolt; 29, limit plate; 30, guide rod; 31, spring; 32, end; 33, induction bolt; 40, base; 41, first roller; 42, second roller; 43, third roller; 44, clamping area; 71, first positioning wheel; 72, second positioning wheel; 73, positioning rod; 74, clamping interval; 75, positioning cylinder; 76, connecting plate; 77, guide column; 78, positioning plate; 79, positioning hole; 90, induction plate; 91, first position sensor; 92, second position sensor; 220, through hole; 280, limit head; 270, slot; 271, plane; 272, inclined surface; 710, first rolling groove; 720, second rolling groove; 730, guide surface; 731, first guide block; 732, second guide block. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] like Figure 1 and Figure 2As shown, a fall-proof lifting device includes a lifting component 1, an anti-fall component 2 and a supporting bracket 6, and also includes a positioning component 7. The anti-fall component 2 is arranged on the lifting component 1, and the lifting component 1 includes a frame 11, a motor 12, a first synchronous shaft 13, a second synchronous shaft 14 and a synchronous belt 15. The motor 12 is arranged on the frame 11, and the first synchronous shaft 13 and the second synchronous shaft 14 are respectively arranged at both ends of the frame 11. The first synchronous shaft 13 is connected to the driving end of the motor 12, the motor 12 and the first synchronous shaft 13 are arranged at the lower part of the frame 11, and the second synchronous shaft 14 is arranged at the top of the frame 11.

[0021] The synchronous belt 15 is sleeved on the first synchronous shaft 13 and the second synchronous shaft 14. The motor 12 drives the first synchronous shaft 13 to rotate. The rotation of the first synchronous shaft 13 drives the synchronous belt 15 and the second synchronous shaft 14 to rotate together. The supporting bracket 6 is slidably set on the frame 11. The supporting bracket 6 is slidably set on the frame 11 through a slide rail. The supporting bracket 6 is used to support goods. The supporting bracket 6 supports the goods to be lifted and lowered on the frame 11.

[0022] The lifting assembly 1 also includes a first synchronous wheel 17 and a second synchronous wheel 18. The first synchronous wheel 17 is arranged on the first synchronous shaft 13, and the second synchronous wheel 18 is arranged on the second synchronous shaft 14. The synchronous belt 15 is sleeved on the first synchronous wheel 17 and the second synchronous wheel 18. There are guard rings at both ends of the first synchronous wheel 17 and the second synchronous wheel 18, so that the synchronous belt 15 is restricted in the middle by the two guard rings, and the synchronous belt 15 is not easy to fall off from the first synchronous wheel 17 and the second synchronous wheel 18.

[0023] The lifting assembly 1 also includes a first slide bar 19 and a second slide bar 20, on which a counterweight 3 is slidably arranged. The counterweight 3 is arranged on a synchronous belt 15, and the rotation of the synchronous belt 15 drives the counterweight 3 to rise or fall. The counterweight 3 and the supporting bracket 6 are respectively located on both sides of the frame 11. When the supporting bracket 6 is at the highest position, the counterweight 3 is at the lowest position. When the supporting bracket 6 is at the lowest position, the counterweight 3 is at the highest position. The counterweight 3 serves to reduce the load on the motor 12.

[0024] A buffer block 5 is provided at the lower part of the frame 11, and the buffer block 5 is located on the moving path of the support frame 6. When the support frame 6 descends normally, when the support frame 6 presses down on the buffer block 5, the buffer block 5 has a buffering effect on the support frame 6. When the synchronous belt 15 breaks, the anti-fall cylinder 23 is not triggered to drive the anti-fall rod 25 to move, then the support frame 6 will fall down, and the buffer block 5 has a buffering effect on the falling of the support frame 6, and can also prevent the support frame 6 from continuing to fall.

[0025] A buffer column 8 is also provided at the bottom of the frame 11. The buffer column 8 is located on the falling path of the counterweight 3. If the synchronous belt 15 breaks, the counterweight 3 will fall downward and fall onto the buffer column 8. The buffer column 8 can prevent the counterweight 3 from falling.

[0026] like Figure 3 and Figure 4 and Figure 5 As shown, the anti-falling assembly 2 includes a lifting block 21, a lifting column 22, an anti-falling cylinder 23, a proximity switch 24, an anti-falling rod 25 and a rack 26. The lifting block 21 and the anti-falling cylinder 23 are arranged on the supporting frame 6. The lifting column 22 can be lifted and lowered on the lifting block 21. The lifting column 22 is elastically connected to the lifting block 21. The lifting column 22 is connected to the synchronous belt 15, so that when the synchronous belt 15 rotates, the lifting block 21 and the supporting frame 6 can rise or fall.

[0027] The anti-fall rod 25 is movably set on the supporting frame 6, the anti-fall rod 25 passes through the supporting frame 6, the anti-fall rod 25 is connected to the driving end of the anti-fall cylinder 23, the rack 26 is set on the frame 11, the rack 26 is located on the moving path of the anti-fall rod 25, the rack 26 is vertically set, and the rack 26 is provided with anti-fall teeth 27, and the anti-fall rod 25 is clamped between adjacent anti-fall teeth 27.

[0028] The proximity switch 24 is used to monitor the position of the lifting column 22. The proximity switch 24 is connected to the anti-fall cylinder 23 by signal. The anti-fall rod 25 and the anti-fall tooth 27 have two states of engagement and separation. That is, when the synchronous belt 15 breaks, there is friction between the support frame 6 and the frame 11, and the lifting column 22 is elastically connected to the lifting block 21. At this time, the lifting column 22 quickly approaches the lifting block 21 due to the elastic force, so the lifting column 22 falls faster than the support frame 6. When the lifting column 22 is not within the monitoring range of the proximity switch 24, the proximity switch 24 sends a signal to the anti-fall cylinder 23, and the anti-fall cylinder 23 drives the anti-fall rod 25 to move. The anti-fall rod 25 is engaged between two adjacent anti-fall teeth 27. When the support frame 6 rises and falls normally, the anti-fall rod 25 is separated from the anti-fall tooth 27.

[0029] The anti-fall tooth 27 has a plane 271 and an inclined surface 272, the plane 271 is located at the upper end of the anti-fall tooth 27, the inclined surface 272 is located at the lower end of the anti-fall tooth 27, a slot 270 is formed between two adjacent anti-fall teeth 27, the inclined surface 272 is located at the upper end of the slot 270, and the plane 271 is located at the lower end of the slot 270. The further the slot 270 extends outward, the larger the opening is, that is, the opening end of the slot 270 is larger than the inner end size, so that the plane 271 is conducive to the anti-fall rod 25 entering the slot 270. When the support bracket 6 falls, the inclined surface 272 is also conducive to the anti-fall rod 25 entering the slot 270. The front end of the anti-fall rod 25 first presses on the inclined surface 272, so that when the anti-fall rod 25 falls, the more the anti-fall rod 25 enters the slot 270.

[0030] like Figure 6 and Figure 7 and Figure 8As shown, the lifting assembly 1 also includes at least two rolling mechanisms 4, which are respectively arranged at both ends of the counterweight block 3, and the two rolling mechanisms 4 are respectively in rolling contact with the first slide bar 19 and the second slide bar 20, and the rolling mechanism 4 includes a base 40, a first roller 41, a second roller 42 and a third roller 43, and the first roller 41, the second roller 42 and the third roller 43 are rotatably arranged on the base 40, and the first roller 41, the second roller 42 and the third roller 43 form a clamping area 44, and at least two clamping areas 44 respectively roll and clamp the first slide bar 19 and the second slide bar 20.

[0031] The three side surfaces of the first slide bar 19 are slidably engaged by the first roller 41, the second roller 42 and the third roller 43, and the three side surfaces of the second slide bar 20 are slidably engaged by the first roller 41, the second roller 42 and the third roller 43, so that the counterweight 3 is restricted between the first slide bar 19 and the second slide bar 20, and the counterweight 3 cannot fall off the first slide bar 19 and the second slide bar 20.

[0032] like Fig. 9 and Fig.10 and Fig.11 As shown, the anti-fall component 2 also includes a limit bolt 28 and a limit plate 29, which are arranged on the lifting block 21, and the proximity switch 24 is adjustably arranged on the limit plate 29. The size of the lifting column 22 is replaceable, so that the position of the monitoring area of ​​the lifting column 22 will change, so the height of the proximity switch 24 is adjusted on the limit plate 29 so that the monitoring area of ​​the lifting column 22 is always within the monitoring range of the proximity switch 24.

[0033] The lifting column 22 can be lifted and lowered on the limit bolt 28, and the lifting column 22 can move a set distance on the limit bolt 28. The lifting column 22 is provided with a through hole 220, and the inner diameter of the through hole 220 is larger than the outer diameter of the limit bolt 28. The top of the limit bolt 28 is provided with a limit head 280, and the outer diameter of the limit head 280 is larger than the inner diameter of the through hole 220. In this way, the limit head 280 limits the maximum distance of the lifting column 22. Due to the elastic force, when the synchronous belt 15 breaks, the lifting column 22 quickly drops on the limit bolt 28, so that the monitoring area of ​​the lifting column 22 is not within the monitoring range of the proximity switch 24. At this time, the proximity switch 24 sends a signal to the anti-fall cylinder 23, and the anti-fall cylinder 23 drives the anti-fall rod 25 to move, and the anti-fall rod 25 is engaged with the anti-fall tooth 27.

[0034] The anti-falling assembly 2 also includes a guide rod 30 and a spring 31. The guide rod 30 is movably arranged on the lifting block 21. The top end of the guide rod 30 is connected to the lifting column 22. The bottom end of the guide rod 30 is provided with an end 32. The spring 31 is sleeved on the guide rod 30. The two ends of the spring 31 respectively abut the lifting block 21 and the end 32. When the synchronous belt 15 pulls up the supporting bracket 6, the spring 31 is in a compressed state. When the synchronous belt 15 breaks, the lifting column 22 and the supporting bracket 6 lose the upward pulling force at the same time, and the spring 31 will immediately reset. Under the elastic force of the spring 31, the spring 31 pulls the lifting column 22 downward, so that the monitoring area of ​​the lifting column 22 quickly leaves the monitoring range of the proximity switch 24. The proximity switch 24 quickly sends a signal to the anti-falling cylinder 23, and the anti-falling cylinder 23 drives the anti-falling rod 25 to move, and the anti-falling rod 25 is engaged with the anti-falling tooth 27.

[0035] The anti-fall component 2 also includes a sensing bolt 33, which is arranged on the lifting column 22. The sensing bolt 33 is used to cooperate with the proximity switch 24. According to the position and size of the lifting column 22, the length of the sensing bolt 33 is adjusted to ensure that the sensing bolt 33 is within the monitoring range of the proximity switch 24.

[0036] like Fig.12 and Fig.13 and Fig.14 As shown, the positioning assembly 7 includes a first positioning wheel 71, a second positioning wheel 72 and a positioning rod 73. The first positioning wheel 71 and the second positioning wheel 72 are arranged on the frame 11, and the first positioning wheel 71 is arranged above the second positioning wheel 72. A clamping interval 74 is formed between the first positioning wheel 71 and the second positioning wheel 72. The positioning rod 73 is movably arranged on the support frame 6. According to the height of the goods to be lifted or lowered, the positions of the first positioning wheel 71 and the second positioning wheel 72 are first determined, and then under the drive of the motor 12, the synchronous belt 15 carries the support frame 6 to be lifted or lowered to the set height, the synchronous belt 15 carries the support frame 6 to be suspended, and the positioning rod 73 is inserted into the clamping interval 74, that is, the positioning rod 73 is moved between the first positioning wheel 71 and the second positioning wheel 72, and the positioning rod 73 is fine-tuned and corrected by the first positioning wheel 71 and the second positioning wheel 72. The guide rod 77 has a guiding effect on the positioning rod 73 to prevent the positioning rod 73 from being misaligned with the clamping interval 74.

[0037] The end of the positioning rod 73 has an arc-shaped guide surface 730 , so that when the support bracket 6 supports objects of unequal weight or the synchronous belt stops inaccurately due to fatigue, the positioning rod 73 is more easily inserted into the clamping interval 74 .

[0038] The positioning rod 73 has two states: engaged and away from the clamping interval 74. During the lifting and lowering of the support frame 6 and the cargo, the positioning rod 73 is away from the clamping interval 74. When the support frame 6 and the cargo arrive at the setting position, the positioning rod 73 is pushed and engaged in the clamping interval 74.

[0039] The positioning assembly 7 further includes a positioning cylinder 75 , which is disposed on the support bracket 6 , and the positioning rod 73 is connected to a driving end of the positioning cylinder 75 , and the positioning cylinder 75 drives the positioning rod 73 to move.

[0040] The positioning assembly 7 also includes a connecting plate 76 and a guide column 77. The guide column 77 is movably set on the supporting bracket 6. The guide column 77 and the positioning rod 73 are respectively located on both sides of the positioning cylinder 75. The two ends of the connecting plate 76 are respectively connected to the guide column 77 and the positioning rod 73. The driving end of the positioning cylinder 75 is connected to the middle part of the connecting plate 76. In this example, the driving direction of the positioning cylinder 75 is away from the clamping interval 74, so when the positioning rod 73 is away from the clamping interval 74, the positioning cylinder 75 maintains an outward driving state. When the supporting bracket 6 is raised or lowered to the set height, the driving end of the positioning cylinder 75 retracts, and then the connecting plate 76 drives the guide column 77 and the positioning rod 73 to move together. The positioning rod 73 is clamped in the clamping interval 74, and the guide column 77 has a guiding effect on the positioning rod 73 to prevent the positioning rod 73 from being misaligned with the clamping interval 74.

[0041] The positioning assembly 7 also includes a first guide block 731 and a second guide block 772. The first guide block 731 and the second guide block 772 are both arranged on the support bracket 6. The positioning rod 73 is slidably arranged on the first guide block 731, and the guide rod 77 is slidably arranged on the second guide block 772. The first guide block 731 has a guiding function for the positioning rod 73, and the second guide block 772 has a guiding function for the guide rod 77.

[0042] The positioning assembly 7 also includes a positioning plate 78, which is arranged on the inner side of the frame 11. A plurality of positioning holes 79 are arranged on the positioning plate 78, and the plurality of positioning holes 79 are arranged vertically at intervals. The first positioning wheel 71 and the second positioning wheel 72 are rotatably arranged on the positioning plate 78, so that when the positioning rod 73 enters the clamping interval 74, the positioning rod 73 rolls in contact with the first positioning wheel 71 and the second positioning wheel 72. The positioning hole 79 is used to adjust the position of the positioning plate 78 on the frame 11, and the positioning hole 79 is a long hole.

[0043] A sensor sheet 9 is provided on the support bracket 6, and a first position sensor 91 and a second position sensor 92 are provided on the frame 11. The second position sensor 92 is arranged above the first position sensor 91. When the first position sensor 91 senses the sensor sheet 9, the first position sensor 91 sends a signal to the motor 12, and the motor 12 is driven to rotate at a reduced speed until the sensor sheet 9 and the second position sensor 92 are sensed. At this time, the motor 12 stops driving, and the second position sensor 92 sends a signal to the positioning cylinder 75, the support bracket 6 stops moving, and the positioning cylinder 75 drives the connecting plate 76 to move, and the connecting plate 76 drives the guide rod 77 and the positioning rod 73 to move together.

[0044] The first positioning wheel 71 has a first rolling groove 710 on its periphery, the second positioning wheel 72 has a second rolling groove 720 on its periphery, and the clamping section 74 is located between the first rolling groove 710 and the second rolling groove 720. This can reduce the friction between the positioning rod 73 and the first positioning wheel 71 and the second positioning wheel 72, and the positioning rod 73 can easily enter the clamping section 74. The positioning rod 73 is located in the first rolling groove 710 and the second rolling groove 720 at the same time. The first rolling groove 710 and the second rolling groove 720 can also prevent the positioning rod 73 from offset.

[0045] Likewise, when the positioning rod 73 is about to move away from the clamping section 74 , the positioning rod 73 retracts, and the first positioning wheel 71 and the second positioning wheel 72 rotate together, thereby reducing the friction between the positioning rod 73 and the first positioning wheel 71 and the second positioning wheel 72 .

[0046] like Fig.15 As shown, the positioning assembly 7 also includes a connecting plate 76 and a guide column 77. The guide column 77 is movably set on the support bracket 6. The guide column 77 and the positioning rod 73 are respectively located on both sides of the positioning cylinder 75. The two ends of the connecting plate 76 are respectively connected to the guide column 77 and the positioning rod 73. The driving end of the positioning cylinder 75 is connected to the middle part of the connecting plate 76.

[0047] like Fig.16 As shown, the anti-fall cylinder 23 is arranged on the supporting frame 6, the middle position of the connecting piece 9 is connected to the driving end of the anti-fall cylinder 23, the guide shaft 10 and the anti-fall rod 25 are respectively connected to the two ends of the connecting piece 9, and the anti-fall cylinder 23 is located between the guide shaft 10 and the anti-fall rod 25.

[0048] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A fall prevention lifting device, comprising a lifting component (1), an anti-fall component (2) and a support frame (6), characterized in that: The lifting assembly (1) comprises a frame (11) and a synchronous belt (15), wherein the synchronous belt (15) is rotatably arranged on the frame (11), and the supporting frame (6) is arranged on the synchronous belt (15), and the supporting frame (6) is used to support goods; The anti-falling assembly (2) comprises a lifting block (21), a lifting column (22), an anti-falling cylinder (23), a proximity switch (24), an anti-falling rod (25) and a rack (26); the lifting block (21) and the anti-falling cylinder (23) are arranged on the support frame (16); the lifting column (22) is arranged on the lifting block (21) so as to be able to be lifted and lowered; the lifting column (22) is elastically connected to the lifting block (21); and the lifting column (22) is connected to the synchronous belt (15); The anti-fall rod (25) is movably arranged on the support frame (6), the anti-fall rod (25) is connected to the driving end of the anti-fall cylinder (23), the rack (26) is arranged on the frame (11), the rack (26) is located on the moving path of the anti-fall rod (25), the rack (26) is provided with an anti-fall tooth (27), the anti-fall tooth (27) and the anti-fall tooth (27) have two states of engagement and separation, the proximity switch (24) is used to monitor the position of the lifting column (22), and the proximity switch (24) is connected to the anti-fall cylinder (23) by signal.

2. The anti-fall lifting device according to claim 1, characterized in that: The lifting assembly (1) further comprises a motor (12), a first synchronous shaft (13) and a second synchronous shaft (14); the motor (12) is arranged on the frame (11); the first synchronous shaft (13) and the second synchronous shaft (14) are rotatably arranged at two ends of the frame (11), respectively; the first synchronous shaft (13) is connected to a driving end of the motor (12); and the synchronous belt (15) is sleeved on the first synchronous shaft (13) and the second synchronous shaft (14).

3. The anti-fall lifting device according to claim 2, characterized in that: The lifting assembly (1) further comprises a first synchronous wheel (17) and a second synchronous wheel (18), wherein the first synchronous wheel (17) is arranged on the first synchronous shaft (13), the second synchronous wheel (18) is arranged on the second synchronous shaft (14), and the synchronous belt (15) is sleeved on the first synchronous wheel (17) and the second synchronous wheel (18).

4. The anti-fall lifting device according to claim 1, characterized in that: The lifting assembly (1) further comprises a first sliding bar (19) and a second sliding bar (20), a counterweight (3) being slidably arranged on the first sliding bar (19) and the second sliding bar (20), the counterweight (3) being arranged on the synchronous belt (15), and the counterweight (3) and the supporting bracket (6) being respectively located on two sides of the frame (11).

5. The anti-fall lifting device according to claim 4, characterized in that: The lifting assembly (1) further comprises at least two rolling mechanisms (4), the two rolling mechanisms (4) being respectively arranged at two ends of the counterweight block (3), and the two rolling mechanisms (4) being respectively in rolling contact with the first sliding rod (19) and the second sliding rod (20).

6. The anti-fall lifting device according to claim 5, characterized in that: The rolling mechanism (4) comprises a base (40), a first roller (41), a second roller (42) and a third roller (43); the first roller (41), the second roller (42) and the third roller (43) are rotatably arranged on the base (40); the first roller (41), the second roller (42) and the third roller (43) form a clamping area (44); at least two clamping areas (44) respectively roll and clamp the first slide bar (19) and the second slide bar (20).

7. The anti-fall lifting device according to claim 1, characterized in that: The anti-falling assembly (2) further comprises a limiting bolt (28) and a limiting plate (29), wherein the limiting bolt (28) and the limiting plate (29) are arranged on the lifting block (21), the proximity switch (24) is adjustably arranged on the limiting plate (29), and the lifting column (22) is arranged on the limiting bolt (28) in a manner capable of being lifted and lowered.

8. The anti-fall lifting device according to claim 8, characterized in that: The anti-falling assembly (2) further comprises a guide rod (30) and a spring (31); the guide rod (30) is movably arranged on the lifting block (21); the lifting column (22) is arranged at the top end of the guide rod (30); the bottom end of the guide rod (30) has an end head (32); the spring (31) is sleeved on the guide rod (30); and the two ends of the spring (31) respectively abut against the lifting block (21) and the end head (32).

9. The anti-fall lifting device according to claim 1, characterized in that: The anti-falling assembly (2) further comprises a sensing bolt (33), wherein the sensing bolt (33) is arranged on the lifting column (22), and the sensing bolt (33) is used to cooperate with the proximity switch (24).

10. The anti-fall lifting device according to claim 1, characterized in that: The anti-falling tooth (27) has a plane (271) and an inclined surface (272), wherein the plane (271) is located at the upper end of the anti-falling tooth (27), and the inclined surface (272) is located at the lower end of the anti-falling tooth (27).

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