Lifting system and safety limiting device

Abstract

The invention belongs to the technical field of lifting devices, and particularly relates to a lifting system and a safety limiting device. The lifting system and the safety limiting device comprise a lifting mechanism, a push rod mechanism is arranged on the lifting mechanism, and the push rod mechanism is connected with a locking limiting mechanism; materials needing to be transported can be transported to a designated position through the lifting mechanism, and meanwhile, through matched use of the push rod mechanism and the locking limiting mechanism, the situation that when the weight on the bracket is suddenly reduced or increased, the bracket suddenly sinks or rebounds, and the bracket and operators are injured can be prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of lifting devices, and in particular, relates to a lifting system and a safety limit device. Background Art

[0002] The technical background of lifting devices mainly focuses on improving the safety and reliability of lifting equipment. However, in the use of lifting mechanisms, safety issues are always an important aspect that cannot be ignored. In order to ensure the safe operation of lifting equipment and avoid production accidents caused by overload, overspeed or misoperation, this safety limit device is widely used in various lifting systems. The main function of the safety limit device is to prevent the occurrence of production accidents.

[0003] The technical background of safety limit devices involves the need to ensure operational safety in various mechanical equipment. In a cargo construction elevator with a telescopic platform, the bottom of the telescopic platform is driven by a gear rack. If an obstacle is encountered during the extension process, it needs to stop extending immediately to avoid accidents. Therefore, a device for anti-collision detection is required on the telescopic platform. Summary of the invention

[0004] The present invention is made to solve the above-mentioned problem, and its purpose is to provide a lifting system and a safety limit device that can be applied to the high-speed operation of the production line to ensure production safety and operator safety.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a lifting system and a safety limiting device, comprising a lifting mechanism, wherein a push rod mechanism is arranged on the lifting mechanism, and the push rod mechanism is connected with a locking limiting mechanism.

[0007] The lifting mechanism includes a guide rail and a bracket, one end of the guide rail is connected to the base plate, the other end of the guide rail is connected to the first support plate, the first support plate is provided with a second motor, the second motor is connected to the first roller, the first roller is sleeved with a belt, the bracket is arranged on one side of the base plate, one side of the bracket is connected to an eighth connecting plate, the eighth connecting plate is connected to the first moving frame, the first moving frame is sleeved on the guide rail, both ends of the first moving frame are connected to first pulleys, the pulleys are embedded in the outer guide rail groove, one end of the belt is connected to the first moving frame, the other end of the belt is connected to the mass block, the mass block is connected to the second pulley, and the second pulley is embedded in the inner guide rail groove.

[0008] The push rod mechanism includes a first motor, a first rotating shaft, a second rotating shaft and a second supporting plate, the second supporting plate is connected to the first moving frame, the first motor is arranged on the second supporting plate, the first motor is connected to the first connecting plate, one end of the first rotating shaft and the second rotating shaft are connected to the first connecting plate, the other end of the first rotating shaft and the second rotating shaft are connected to the second connecting plate, the first rotating shaft is sleeved with a first push rod, the second rotating shaft is sleeved with a second push rod, and the first push rod and the second push rod are connected to a locking and limiting mechanism.

[0009] The locking and limiting mechanism includes a third connecting plate, an eleventh connecting plate, a fourth connecting plate, a fifth connecting plate, a sixth connecting plate, a seventh connecting plate, a first limiting plate and a second limiting plate, the third connecting plate is connected to one end of the second supporting plate, the third connecting plate has a first groove, a fifth rotating shaft is arranged in the first groove, one end of the fourth connecting plate and the fifth connecting plate is sleeved on the fifth rotating shaft, the fourth connecting plate and the fifth connecting plate are connected by a first bolt, a first limiting block is sleeved on the first bolt, a sixth rotating shaft is arranged between the fourth connecting plate and the fifth connecting plate, one end of the first push rod is sleeved on the sixth rotating shaft, and the eleventh connecting plate is connected to the other end of the second supporting plate , the eleventh connecting plate has a third groove, and an eighth rotating shaft is arranged in the third groove, one end of the sixth connecting plate and the seventh connecting plate is sleeved on the eighth rotating shaft, the other end of the sixth connecting plate and the seventh connecting plate is connected by a second bolt, and a second limit block is sleeved on the second bolt, and a seventh rotating shaft is arranged between the sixth connecting plate and the seventh connecting plate, and the second push rod is sleeved on the seventh rotating shaft, the guide rail on one side of the second support plate is connected to the first limit plate, the first limit plate has a second groove, the first limit block cooperates with the second groove, the guide rail on the other side of the second support plate is connected to the second limit plate, and the second limit plate has a fourth groove, and the fourth groove cooperates with the second limit block.

[0010] The lifting mechanism is symmetrically arranged about the central axis of the second supporting plate.

[0011] A first protection frame is sleeved at the connection between the guide rail and the bottom plate, a first reinforcing plate is arranged at the connection between the first protection frame and the guide rail, and the first protection frame is connected to a second protection frame.

[0012] A ninth connecting plate is connected between the eighth connecting plate and the first movable frame, a tenth connecting plate is arranged on both sides of the eighth connecting plate, the tenth connecting plate is abutted against the eighth connecting plate, a third protective frame is arranged at the bottom end of the bracket, a pad is arranged at the connection between the third protective frame and the bracket, and a second reinforcing plate is arranged between the pad and the third protective frame.

[0013] A connecting structure is provided at the connection between the belt and the first moving frame, and the connecting structure includes a support plate, the support plate is connected to the first moving frame, a first fixed plate, a second fixed plate and a third fixed plate are provided above the support plate, a second roller is provided in the middle of the support plate, one end of the belt passes through the gap between the first fixed plate and the second fixed plate, bypasses the second roller and passes through the gap between the second fixed plate and the third fixed plate, and the first fixed plate, the second fixed plate and the third fixed plate are connected by bolts.

[0014] The support plate is connected to the first moving frame through a threaded rod, one end of the threaded rod passes through the first moving frame, the threaded rod is connected to a fourth fixing plate, a fifth fixing plate is arranged on one side of the fourth fixing plate, the fifth fixing plate is connected to the first moving frame, a first balancing plate is arranged at one end of the fourth fixing plate, the first balancing plate is respectively connected to the fourth fixing plate and the fifth fixing plate through a rotating shaft, a V-shaped groove is opened at one end of the first balancing plate, a sixth fixing plate is connected to one end of the first moving frame close to the first balancing plate, a second balancing plate is arranged on one side of the sixth fixing plate, a third roller is connected to one end of the second balancing plate, and the third roller cooperates with the V-shaped groove.

[0015] The connection between the belt and the mass block is connected via a connection structure.

[0016] The technical effect of the present invention is as follows: the second motor is started, the second motor rotates forward to drive the first roller to rotate, the first roller drives the belt to move, the belt pulls the first moving frame, the first moving frame is provided with first pulleys that cooperate with the guide rail at both ends, the first moving frame drives the first pulley to move up and down along the guide rail, the bracket and the material on the bracket move upward, the mass block provides a weight to balance the bracket, and prevents the bracket from rising or falling too fast. When the second motor is reversed, the bracket moves downward. When it is necessary to transport parts and materials, it is necessary to start the push rod mechanism and the locking limit mechanism. The first motor drives the first connecting plate and the second connecting plate to rotate. At the same time, the first rotating shaft and the second rotating shaft will also rotate around the first motor shaft. The first push rod pushes the fourth connecting plate and the fifth connecting plate to rotate around the fifth rotating shaft. At the same time, the fourth connecting plate and the fifth connecting plate are connected by the first bolt. The first bolt is provided with a first limit block, and the first limit block is embedded in the second groove. When the weight on the bracket suddenly decreases or increases, the bracket will suddenly sink or rebound, causing damage to the bracket and the operator. Since the first limit block is stuck in the second groove, it can provide a buffer force for the first moving frame and the bracket, so that the bracket will not suddenly sink or rebound. The second push rod pushes the sixth connecting plate and the seventh connecting plate to rotate around the eighth rotating shaft. The sixth connecting plate and the seventh connecting plate are connected by a second bolt. A second limit block is sleeved on the second bolt. The second limit block can be engaged with the fourth slot. The second limit block is stuck in the fourth slot to prevent the bracket from suddenly sinking or rebounding when the weight on the bracket suddenly decreases or increases. It can provide a buffer force for the first moving frame and the bracket, so that the bracket will not suddenly sink or rebound. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification includes the following drawings, which show the following contents:

[0018] Figure 1 It is the overall structure diagram of the present invention;

[0019] Figure 2 The present invention Figure 1 The enlarged view of point B in the middle;

[0020] Figure 3 The present invention Figure 1 The enlarged view of the back side at B in the middle;

[0021] Figure 4 It is a schematic diagram of the connection between the guide rail and the base in the present invention;

[0022] Figure 5 The present invention Figure 1 The enlarged view of point A in the middle;

[0023] Figure 6 The present invention Figure 1 Enlarged view of point C in the middle;

[0024] Figure 7It is a side view of the overall structure of the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the first limiting plate of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the second limiting plate of the present invention;

[0027] Fig.10 It is a schematic diagram of the matching structure of the third roller and the V-shaped groove of the present invention;

[0028] Fig.11 It is a schematic diagram of the connection structure between the bracket and the guide rail of the present invention.

[0029] The markings in the figure are: 1, lifting mechanism; 101, guide rail; 102, bracket; 103, bottom plate; 104, first support plate; 105, second motor; 106, first roller; 107, belt; 108, eighth connecting plate; 109, first moving frame; 110, first pulley; 111, mass block; 112, second pulley; 113, first protection frame; 114, first reinforcement plate; 115, second protection frame; 116, 9th connecting plate; 117, 10th connecting plate; 118, 3rd protection frame; 119, pad; 120, 2nd reinforcing plate; 2, push rod mechanism; 201, 1st motor; 202, 1st connecting plate; 203, 1st rotating shaft; 204, 2nd rotating shaft; 205, 2nd supporting plate; 206, 2nd connecting plate; 207, 1st push rod; 208, 2nd push rod; 3, locking limit mechanism; 301, 3rd connecting plate; 302, 4th connecting plate; 303, fifth connecting plate; 304, sixth connecting plate; 305, seventh connecting plate; 306, limiting plate; 307, first slot; 308, fifth rotating shaft; 309, first bolt; 310, first limiting block; 311, sixth rotating shaft; 312, second bolt; 313, second limiting block; 314, seventh rotating shaft; 315, second slot; 316, eleventh connecting plate; 317, second limiting plate; 318, first Three grooves; 319, the eighth rotating shaft; 320, the fourth groove; 4, the connecting structure; 401, the supporting plate; 402, the first fixing plate; 403, the second fixing plate; 404, the third fixing plate; 405, the second roller; 406, the fourth fixing plate; 407; the fifth fixing plate; 408, the first balancing plate; 409, the V-shaped groove; 410, the sixth fixing plate; 411, the second balancing plate; 412, the third roller; 413, the threaded rod. DETAILED DESCRIPTION

[0030] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0031] like Figures 1 to 9 As shown, a lifting system and a safety limit device include a lifting mechanism 1, a push rod mechanism 2 is arranged on the lifting mechanism 1, and the push rod mechanism 2 is connected to a locking limit mechanism 3. The lifting mechanism 1 is used to transport materials and supplies required, and the push rod mechanism 2 and the locking mechanism 3 are used in conjunction with each other to prevent the load of the bracket 102 from being instantly increased or reduced when the lifting mechanism 1 transports materials and supplies, causing the bracket 102 to suddenly sink or rebound, causing damage to the bracket 102 and the operator.

[0032] The lifting mechanism 1 includes a guide rail 101 and a bracket 102, one end of the guide rail 101 is connected to a base plate 103, the other end of the guide rail 101 is connected to a first support plate 104, a second motor 105 is provided on the first support plate 104, the second motor 105 is connected to a first roller 106, the first roller 106 is sleeved with a belt 107, the bracket 102 is arranged on one side of the base plate 103, one side of the bracket 102 is connected to an eighth connecting plate 108, the eighth connecting plate 108 is connected to a first moving frame 109, the first moving frame 109 is sleeved on the guide rail 101, both ends of the first moving frame 109 are connected to first pulleys 110, the first pulley 110 is embedded in the outer groove of the guide rail 101, one end of the belt 107 is connected to the first moving frame 109, the other end of the belt 107 is connected to a mass block 111, the mass block 111 is connected to a second pulley 112, and the second pulley 112 is embedded in the inner groove of the guide rail 101. The second motor 105 is started, and the second motor 105 rotates forward to drive the first roller 106 to rotate, and the first roller 106 drives the belt 107 to move, and the belt 107 pulls the first moving frame 109. The first moving frame 109 is provided with first pulleys 110 that cooperate with the guide rail 101 at both ends, and the first moving frame 109 drives the first pulley 110 to move up and down along the guide rail 101, and the bracket 102 and the material on the bracket 102 move upward, and the mass block 111 provides a weight to balance the bracket 102 to prevent the bracket 102 from rising or falling too fast. When the second motor 105 is reversed, the bracket 102 moves downward.

[0033] like Figure 3As shown, the push rod mechanism 2 includes a first motor 201, a first rotating shaft 203, a second rotating shaft 204 and a second supporting plate 205, the second supporting plate 205 is connected to the first moving frame 109, the first motor 201 is arranged on the second supporting plate 205, the output shaft of the first motor 201 is connected to the first connecting plate 202, one end of the first rotating shaft 203 and the second rotating shaft 204 is connected to the first connecting plate 202, the other end of the first rotating shaft 203 and the second rotating shaft 204 is connected to the second connecting plate 206, the first connecting plate 202 and the second connecting plate 206 are square plates, a column is arranged on one side of the first motor 201, a flat plate is arranged on the column, and a limiting rod is arranged on the flat plate for limiting the first connecting plate 202 and the second connecting plate 206. The first rotating shaft 203 is sleeved with a first push rod 207, the second rotating shaft 204 is sleeved with a second push rod 208, and the first push rod 207 and the second push rod 208 are connected to the locking limiting mechanism 3. The first motor 201 drives the first connecting plate 202 and the second connecting plate 206 to rotate, and the first rotating shaft 203 and the second rotating shaft 204 also rotate around the axis of the first motor 201. At the same time, the first rotating shaft 203 pushes the first push rod 207, and the second rotating shaft 204 pushes the second push rod 208 to cooperate with the locking limit mechanism 3 to prevent the load of the bracket 102 from increasing or decreasing instantly, causing the bracket 102 to suddenly sink or rebound, causing damage to the bracket 102 and the operator.

[0034] like Figure 2 , Figure 8 and Fig. 9As shown, the locking and limiting mechanism 3 includes a third connecting plate 301, an eleventh connecting plate 316, a fourth connecting plate 302, a fifth connecting plate 303, a sixth connecting plate 304, a seventh connecting plate 305, a first limiting plate 306 and a second limiting plate 317. The third connecting plate 301 is connected to one end of the second supporting plate 205. The third connecting plate 301 is provided with a first groove 307. A fifth rotating shaft 308 is arranged in the first groove 307. One end of the fourth connecting plate 302 and the fifth connecting plate 303 is sleeved on the fifth rotating shaft 308. The fourth connecting plate 302 and the fifth connecting plate 303 are connected by a first bolt 309. A first limiting block 310 is sleeved on the first bolt 309. A sixth rotating shaft 311 is arranged between the fourth connecting plate 302 and the fifth connecting plate 303. One end of the first push rod 207 is sleeved on the sixth rotating shaft 311. The eleventh connecting plate 316 is connected to the other end of the second supporting plate 205. The plate 316 has a third groove 318, and an eighth rotating shaft 319 is arranged in the third groove 318. One end of the sixth connecting plate 304 and the seventh connecting plate 305 is sleeved on the eighth rotating shaft 319. The other end of the sixth connecting plate 304 and the seventh connecting plate 305 is connected by a second bolt 312. The second limit block 313 is sleeved on the second bolt 312. The seventh rotating shaft 314 is arranged between the sixth connecting plate 304 and the seventh connecting plate 305. The second push rod 208 is sleeved on the seventh On the rotating shaft 314, the guide rail 101 on one side of the second support plate 205 is connected to the first limit plate 306, the first limit plate 306 has a second groove 315, the second groove 315 is a U-shaped groove, the first limit block 310 cooperates with the second groove 315, the guide rail 101 on the other side of the second support plate 205 is connected to the second limit plate 317, the second limit plate 317 has a fourth groove 320, the fourth groove 320 is a U-shaped groove, and the fourth groove 320 cooperates with the second limit block 313.

[0035] The first push rod 207 of the push rod mechanism 2 pushes the fourth connecting plate 302 and the fifth connecting plate 303 to rotate around the fifth rotating shaft 308. At the same time, the fourth connecting plate 302 and the fifth connecting plate 303 are connected by the first bolt 309. The first bolt 309 is covered with a first limit block 310, and the first limit block 310 is embedded in the second groove 315. When the bracket 102 is used for transportation, the first limit block 310 can cooperate with the second groove 315. When the weight on the bracket 102 is suddenly reduced or increased, it causes the bracket 102 to suddenly sink or rebound, causing damage to the bracket 102 and the operator. Since the first limit block 310 is stuck in the second groove 315, it can provide a buffer force for the first moving frame 109 and the bracket 102, so that the bracket 102 will not suddenly sink or rebound.

[0036] The second push rod 208 pushes the sixth connecting plate 304 and the seventh connecting plate 305 to rotate around the eighth rotating shaft 319. The sixth connecting plate 304 and the seventh connecting plate 305 are connected by the second bolt 312. The second bolt 312 is provided with a second limit block 313. The second limit block 313 can be engaged with the fourth groove 320. The second limit block 313 is inserted into the fourth groove 320 to prevent the bracket 102 from suddenly sinking or rebounding when the weight on the bracket 102 is suddenly reduced or increased. It can provide a buffer force for the first moving frame 109 and the bracket 102, so that the bracket 102 will not suddenly sink or rebound.

[0037] The lifting mechanism 1, the push rod mechanism 2 and the locking and limiting mechanism 3 are symmetrically arranged about the central axis of the second support plate 205. The lifting mechanism 1 is symmetrically arranged to make the bracket 102 rise more smoothly, and the bracket 102 can also transport parts and materials more efficiently. The push rod mechanism 2 and the locking and limiting mechanism 3 are used in conjunction with each other. When parts and materials need to be transported, the push rod mechanism 2 and the limiting mechanism 3 are used in conjunction with each other. The symmetrical arrangement of the push rod mechanism 2 and the locking and limiting mechanism 3 can more effectively prevent the bracket 102 from suddenly sinking or rebounding when the weight of the bracket 102 suddenly decreases or increases.

[0038] like Figure 4 As shown, a first protective frame 113 is sleeved at the connection between the guide rail 101 and the bottom plate 103, a first reinforcing plate 114 is provided at the connection between the first protective frame 113 and the guide rail 101, and the first protective frame 113 is connected to a second protective frame 115. The first protective frame 113, the first reinforcing plate 114, and the second protective frame 115 can strengthen the connection strength of the guide rail 101 to prevent the guide rail 101 from tilting because the materials and parts carried by the bracket 102 are too heavy and cannot be borne by the guide rail 101.

[0039] like Figure 2 and Figure 7 As shown, a ninth connecting plate 116 is connected between the eighth connecting plate 108 and the first moving frame 109, and the ninth connecting plate 116 can strengthen the connection strength between the eighth connecting plate 108 and the first moving frame 109, and a tenth connecting plate 117 is arranged on both sides of the eighth connecting plate 108, and the tenth connecting plate 117 is against the eighth connecting plate 108, and the tenth connecting plate 117 can firmly fix the eighth connecting plate 108 and will not allow the eighth connecting plate 108 to deviate left or right, and a third protective frame 118 is arranged at the bottom end of the bracket 102, and the third protective frame 118 can play a supporting role for the bracket 102, so that the bracket 102 will not be deformed due to the excessive mass of parts and materials, and a pad 119 is arranged at the connection between the third protective frame 118 and the bracket 102, and a second reinforcing plate 120 is arranged between the pad 119 and the third protective frame 118; the pad 119 and the second reinforcing plate 120 can further strengthen the strength of the bracket 102.

[0040] like Figure 6 and Fig.10 As shown, a connecting structure 4 is provided at the connection between the belt 107 and the first moving frame 109, and the connecting structure 4 includes a support plate 401, the support plate 401 is connected to the first moving frame 109, a first fixed plate 402, a second fixed plate 403 and a third fixed plate 404 are provided above the support plate 401, a second roller 405 is provided in the middle of the support plate 401, one end of the belt 107 passes through the gap between the first fixed plate 402 and the second fixed plate 403, bypasses the second roller 405, and passes through the gap between the second fixed plate 403 and the third fixed plate 404, and the first fixed plate 402, the second fixed plate 403 and the third fixed plate 404 are connected by bolts. By fixing the first fixed plate 402, the second fixed plate 403 and the third fixed plate 404 with bolts, the belt 107 is allowed to pass through the gap between the first fixed plate 402 and the second fixed plate 403 and bypass the second roller 405, and finally the belt 107 is fixed in the gap between the second fixed plate 403 and the third fixed plate 404. This can not only strengthen the connection strength between the belt 107 and the first movable frame 109, but also facilitate the removal of the belt 107 when it is necessary to replace the belt 107.

[0041] The support plate 401 is connected to the first moving frame 109 through a threaded rod 413, one end of the threaded rod 413 passes through the first moving frame 109, the threaded rod 413 is connected to the fourth fixed plate 406, on one side of the fourth fixed plate 406, the first moving frame 109 is connected to the fifth fixed plate 407, the first balance plate 408 is respectively connected to the fourth fixed plate 406 and the fifth fixed plate 407 through a rotating shaft, a V-shaped groove 409 is opened at one end of the first balance plate 408, the end of the first moving frame 109 close to the first balance plate 408 is connected to the sixth fixed plate 410, a second balance plate 411 is arranged on one side of the sixth fixed plate 410, one end of the second balance plate 411 is connected to the third roller 412, and the third roller 412 cooperates with the V-shaped groove 409. The fourth fixing plate 406 and the fifth fixing plate 407 are arranged on the other side of the first moving frame 109. At the same time, a groove matching the first balancing plate 408 is opened between the fourth fixing plate 406 and the fifth fixing plate 407. The V-shaped groove 409 on the first balancing plate 408 cooperates with the third roller 412. When the belts 107 on both sides cannot maintain the same horizontal position, the V-shaped groove 409 will swing up and down, and at the same time, it will also drive the third roller 412 to move. The third roller 412 will give the V-shaped groove 409 an opposite force to help the belts 107 on both sides maintain the same horizontal position.

[0042] The connection between the belt 107 and the mass block 111 is provided with a connection structure 4. This can not only strengthen the connection strength between the belt 107 and the mass block 111, but also facilitate the removal of the belt 107 when the belt 107 needs to be replaced.

[0043] Functions and Effects of the Embodiments

[0044] The second motor 105 is started, and the second motor 105 rotates forward to drive the first roller 106 to rotate, and the first roller 106 drives the belt 107 to move, and the belt 107 pulls the first moving frame 109. The first moving frame 109 is provided with first pulleys 110 that cooperate with the guide rail 101 at both ends, and the first moving frame 109 drives the first pulley 110 to move up and down along the guide rail 101, and the bracket 102 and the material on the bracket 102 move upward, and the mass block 111 provides a weight to balance the bracket 102 to prevent the bracket 102 from rising or falling too fast. When the second motor 105 is reversed, the bracket 102 moves downward. When it is necessary to transport parts and materials, it is necessary to start the push rod mechanism 2 and the locking limit mechanism 3. The first motor 201 drives the first connecting plate 202 and the second connecting plate 206 to rotate. At the same time, the first rotating shaft 203 and the second rotating shaft 204 will also rotate around the first motor 201 axis. The first push rod 207 pushes the fourth connecting plate 302 and the fifth connecting plate 303 to rotate around the fifth rotating shaft 308. At the same time, the fourth connecting plate 302 and the fifth connecting plate 303 are connected by the first bolt 309. The first bolt 309 is provided with a first limit block 310, and the first limit block 310 is embedded in the second groove 315. When the weight on the bracket 102 is suddenly reduced or increased, the bracket 102 suddenly sinks or rebounds, causing damage to the bracket 102 and the operator. Since the first limit block 310 is stuck in the second groove 315, it can provide a buffer force for the first moving frame 109 and the bracket 102, so that the bracket 102 will not suddenly sink or rebound. The second push rod 208 pushes the sixth connecting plate 304 and the seventh connecting plate 305 to rotate around the eighth rotating shaft 319. The sixth connecting plate 304 and the seventh connecting plate 305 are connected by the second bolt 312. The second bolt 312 is sleeved with a second limit block 313. The second limit block 313 can also be connected to the fourth groove 320. The second limit block 313 is stuck in the fourth groove 320 to prevent the bracket 102 from suddenly sinking or rebounding when the weight on the bracket 102 suddenly decreases or increases. It can provide a buffer force for the first moving frame 109 and the bracket 102, so that the bracket 102 will not suddenly sink or rebound.

[0045] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A lifting system and a safety limit device, characterized in that: It comprises a lifting mechanism (1), wherein the lifting mechanism (1) is provided with a push rod mechanism (2), and the push rod mechanism (2) is connected to a locking and limiting mechanism (3).

2. A lifting system and a safety limit device according to claim 1, characterized in that: The lifting mechanism (1) comprises a guide rail (101) and a bracket (102), one end of the guide rail (101) is connected to a base plate (103), the other end of the guide rail (101) is connected to a first support plate (104), a second motor (105) is arranged on the first support plate (104), the second motor (105) is connected to a first roller (106), the first roller (106) is sleeved with a belt (107), the bracket (102) is arranged on one side of the base plate (103), one side of the bracket (102) is connected to an eighth connecting plate (108), the The eighth connecting plate (108) is connected to a first movable frame (109), the first movable frame (109) is sleeved on the guide rail (101), both ends of the first movable frame (109) are connected to first pulleys (110), the first pulleys (110) are embedded in the outer groove of the guide rail (101), one end of the belt (107) is connected to the first movable frame (109), the other end of the belt (107) is connected to a mass block (111), the mass block (111) is connected to a second pulley (112), and the second pulley (112) is embedded in the inner groove of the guide rail (101).

3. A lifting system and a safety limit device according to claim 2, characterized in that: The push rod mechanism (2) comprises a first motor (201), a first rotating shaft (203), a second rotating shaft (204) and a second supporting plate (205); the second supporting plate (205) is connected to the first moving frame (109); the first motor (201) is arranged on the second supporting plate (205); the first motor (201) is connected to the first connecting plate (202); one end of the first rotating shaft (203) and the second rotating shaft (204) are connected to the first connecting plate (202); the other end of the first rotating shaft (203) and the second rotating shaft (204) are connected to the second connecting plate (206); the first rotating shaft (203) is sleeved with a first push rod (207); the second rotating shaft (204) is sleeved with a second push rod (208); the first push rod (207) and the second push rod (208) are connected to the locking and limiting mechanism (3).

4. A lifting system and a safety limit device according to claim 3, characterized in that: The locking and limiting mechanism (3) comprises a third connecting plate (301), an eleventh connecting plate (316), a fourth connecting plate (302), a fifth connecting plate (303), a sixth connecting plate (304), a seventh connecting plate (305), a first limiting plate (306) and a second limiting plate (317); the third connecting plate (301) is connected to one end of the second supporting plate (205); the third connecting plate (301) is provided with a first groove (307); a fifth rotating shaft (308) is arranged in the first groove (307); the fourth connecting plate (302) , one end of the fifth connecting plate (303) is sleeved on the fifth rotating shaft (308), the fourth connecting plate (302) and the fifth connecting plate (303) are connected by a first bolt (309), the first bolt (309) is sleeved with a first limit block (310), a sixth rotating shaft (311) is arranged between the fourth connecting plate (302) and the fifth connecting plate (303), one end of the first push rod (207) is sleeved on the sixth rotating shaft (311), the eleventh connecting plate (316) is connected to the other end of the second supporting plate (205), the The eleventh connecting plate (316) is provided with a third groove (318), an eighth rotating shaft (319) is arranged in the third groove (318), one end of the sixth connecting plate (304) and the seventh connecting plate (305) is sleeved on the eighth rotating shaft (319), the other end of the sixth connecting plate (304) and the seventh connecting plate (305) are connected by a second bolt (312), a second limiting block (313) is sleeved on the second bolt (312), a seventh rotating shaft (314) is arranged between the sixth connecting plate (304) and the seventh connecting plate (305), The second push rod (208) is sleeved on the seventh rotating shaft (314); the guide rail (101) on one side of the second support plate (205) is connected to the first limit plate (306); the first limit plate (306) is provided with a second groove (315); the first limit block (310) cooperates with the second groove (315); the guide rail (101) on the other side of the second support plate (205) is connected to the second limit plate (317); the second limit plate (317) is provided with a fourth groove (320); the fourth groove (320) cooperates with the second limit block (313).

5. A lifting system and a safety limit device according to claim 4, characterized in that: The central axis of the lifting mechanism (1) is symmetrically arranged.

6. A lifting system and a safety limit device according to claim 2, characterized in that: A first protection frame (113) is sleeved at the connection between the guide rail (101) and the bottom plate (103), a first reinforcing plate (114) is provided at the connection between the first protection frame (113) and the guide rail (101), and the first protection frame (113) is connected to a second protection frame (115).

7. A lifting system and a safety limit device according to claim 2, characterized in that: A ninth connecting plate (116) is connected between the eighth connecting plate (108) and the first movable frame (109), a tenth connecting plate (117) is arranged on both sides of the eighth connecting plate (108), the tenth connecting plate (117) is abutted against the eighth connecting plate (108), a third protective frame (118) is arranged at the bottom end of the bracket (102), a pad (119) is arranged at the connection between the third protective frame (118) and the bracket (102), and a second reinforcing plate (120) is arranged between the pad (119) and the third protective frame (118).

8. A lifting system and a safety limit device according to claim 2, characterized in that: A connection structure (4) is provided at the connection point between the belt (107) and the first moving frame (109), and the connection structure (4) comprises a support plate (401), the support plate (401) is connected to the first moving frame (109), a first fixed plate (402), a second fixed plate (403) and a third fixed plate (404) are provided above the support plate (401), a second roller (405) is provided in the middle of the support plate (401), one end of the belt (107) passes through the gap between the first fixed plate (402) and the second fixed plate (403), bypasses the second roller (405), and passes through the gap between the second fixed plate (403) and the third fixed plate (404), and the first fixed plate (402), the second fixed plate (403) and the third fixed plate (404) are connected by bolts.

9. A lifting system and a safety limit device according to claim 8, characterized in that: The support plate (401) is connected to the first moving frame (109) via a threaded rod (413), one end of the threaded rod (413) passes through the first moving frame (109), the threaded rod (413) is connected to a fourth fixing plate (406), a fifth fixing plate (407) is arranged on one side of the fourth fixing plate (406), the fifth fixing plate (407) is connected to the first moving frame (109), a first balancing plate (408) is arranged on one end of the fourth fixing plate (406), and the first balancing plate ( 408) are respectively connected to the fourth fixing plate (406) and the fifth fixing plate through a rotating shaft, a V-shaped groove (409) is opened at one end of the first balancing plate (408), a sixth fixing plate (410) is connected to one end of the first moving frame (109) close to the first balancing plate (409), a second balancing plate (411) is arranged on one side of the sixth fixing plate (410), a third roller (412) is connected to one end of the second balancing plate (411), and the third roller (412) cooperates with the V-shaped groove (409).

10. A lifting system and a safety limit device according to claim 8, characterized in that: The connection point between the belt (107) and the mass block (111) is connected via a connection structure (4).

Images