A multi-way vertical switching device for load-bearing rails

Abstract

The present invention belongs to the technical field of elevators, and specifically relates to a multi-way vertical switching device for load-bearing rails, comprising a rail frame and a lifting component, a counterweight component, a transmission component and a load-bearing rail arranged on the rail frame, wherein the load-bearing rail is placed on the lifting component and moves synchronously with the lifting component, and multiple layers of conveying rails are arranged at the front and rear ends of the rail frame, and the load-bearing rails are docked with the multiple layers of conveying rails through vertical displacement switching; the lifting component comprises a lifting frame, an inflation mechanism and a buffer mechanism, the inflation mechanism and the buffer mechanism are arranged on the lifting frame, the inflation mechanism is connected with the buffer mechanism, a guide rail and a blocking mechanism are arranged on the rail frame, the buffer mechanism is slidably arranged on both sides of the guide rail, and the inflation mechanism and the blocking mechanism resist the force used to inflate the buffer mechanism; it can provide buffering for the lifting component and the counterweight component in the event of a fault, thereby improving safety.

Description

Technical Field

[0001] The invention belongs to the technical field of elevators, and in particular relates to a multi-channel vertical switching device for a load-bearing track. Background Art

[0002] Lifts, also known as lifting work platforms, are multifunctional lifting mechanical equipment that is favored for its unique lifting function and wide range of applications. It can not only be used to move building materials, equipment and personnel at construction sites, but also to move heavy objects, equipment and tools in the manufacturing industry. In addition, lifts also play an irreplaceable role in logistics, warehousing, automobile and other industries. With the acceleration of urbanization and the popularization of multi-story buildings, the demand for lifts is also increasing.

[0003] With the popularization of manufacturing automation production lines in multi-story buildings, the demand for connection between production line equipment on each floor has increased. At present, inclined tracks are mainly used to connect the upper and lower production lines. The connection is one-to-one, and the connection between different production lines cannot be flexibly switched, which limits the flexible production of automated production lines. At present, there are also elevators that switch the connection of conveyor tracks between the upper and lower production lines, but the existing elevators are often designed on one side and one side, with limited load capacity, and are only suitable for production line switching and docking between two floors of light-loaded workpieces, and cannot adapt to the rapid docking production of production lines between three or more floors of heavy-loaded workpieces.

[0004] In addition, since the elevator needs to be lifted and lowered frequently during operation, there is a high probability of failure. The elevator is counterweighted by a counterweight block, and the lifting and lowering of the counterweight block and the object being lifted are adjusted by a motor. Therefore, after the elevator fails, the heavier side will fall rapidly. Although the existing elevators are equipped with a deceleration device to prevent falling, it is generally necessary to detect the state of the elevator through a sensor. When a rapid fall of the elevator is detected, the corresponding deceleration device is activated to decelerate the falling object. However, this action needs to be detected by the sensor before it can be executed, and there is a certain lag. At the same time, there may be a lot of dust or other objects that may affect the sensor detection in the factory, which may cause the sensor to misjudge.

[0005] Based on this, a multi-way vertical switching device of a load-bearing track with a mechanical passive buffer structure is proposed. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides a multi-way vertical switching device for a load-bearing track.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A multi-channel vertical switching device for a load-bearing track of the present invention comprises a track frame and a lifting assembly, a counterweight assembly, a transmission assembly and a load-bearing track arranged on the track frame. The load-bearing track is placed on the lifting assembly and moves synchronously with the lifting assembly. Multi-layer conveyor rails are arranged at the front and rear ends of the track frame. The load-bearing track is docked with the multi-layer conveyor rails through vertical displacement switching. The transmission assembly comprises a motor, a roller and a transmission belt. The roller is transmission-connected to the output shaft of the motor. The transmission belt rolls and fits on the roller, and the two ends of the transmission belt are respectively connected to the lifting assembly and the counterweight assembly.

[0009] The lifting assembly includes a lifting frame, an inflation mechanism and a buffer mechanism, wherein the inflation mechanism and the buffer mechanism are arranged on the lifting frame, the inflation mechanism is connected with the buffer mechanism, the track frame is provided with a guide track and a blocking mechanism, the buffer mechanism is slidably arranged on both sides of the guide track, and the inflation mechanism and the blocking mechanism resist the force for inflating the buffer mechanism.

[0010] Furthermore, the lifting assembly also includes a lifting roller group, and the counterweight assembly includes a counterweight frame and a counterweight roller group. The lifting roller group and the counterweight roller group are respectively arranged on the lifting frame and the counterweight frame, and are in rolling contact with the track frame.

[0011] Furthermore, the track frame includes a plurality of interconnected I-channel steels, the lifting roller group and the counterweight roller group include a plurality of lifting wheels and a counterweight wheel respectively, and the plurality of lifting wheels and the plurality of counterweight wheels are respectively relatively abutted against the side walls of the I-channel steels.

[0012] Furthermore, the buffer mechanism includes two cylinders arranged opposite to each other on the lifting frame, and buffer rollers are arranged on the two cylinders. The two buffer rollers roll and abut against two opposite sides of the guide track, and the two cylinders are connected to the inflation mechanism.

[0013] Furthermore, the inflation mechanism includes an inflation cylinder and a pressure relief valve, and the pressure relief valve is arranged on the side wall of the inflation cylinder.

[0014] Furthermore, a one-way valve is provided on the air pipe connecting the two air cylinders and the air charging tube.

[0015] Furthermore, a spring is sleeved on the inflatable cylinder, one end of the spring abuts against the inflatable cylinder, and the other end abuts against the lifting frame.

[0016] Furthermore, the blocking mechanism includes a telescopic bracket and a blocking wheel, the telescopic bracket is arranged on the track frame, the blocking wheel is rotatably arranged on the telescopic bracket, a blocking block is arranged on the inflatable cylinder, and the abutment point between the blocking block and the blocking wheel is an inclined surface.

[0017] Furthermore, a plurality of blocking mechanisms are arranged on the track frame along the moving direction of the lifting assembly.

[0018] Furthermore, the conveyor rails are divided into upper, middle and lower layers, and are placed at the front and rear ends of the track frame. The front end is the upper, middle and lower layers of conveyor rails, and the rear end is the workpiece assembly conveyor rail, the workpiece light maintenance conveyor rail and the workpiece heavy maintenance conveyor rail.

[0019] The beneficial effects of the present invention are:

[0020] (1) By arranging a buffer mechanism and an air-filling mechanism on the lifting assembly, the lifting assembly can be abutted and matched with the blocking mechanism on the track frame during the lifting process. During normal lifting, the telescopic bracket of the blocking mechanism can be extended and swung, so that the gas in the air cylinder on the air-filling mechanism is discharged from the pressure relief valve. When the motor fails or the transmission belt is detached, causing the lifting assembly and the counterweight assembly to lose balance and fall rapidly, the air-filling mechanism and the blocking mechanism will quickly abut, resulting in the gas in the air cylinder not being completely discharged from the pressure relief valve, but partially being filled into the cylinder of the buffer mechanism, so that the buffer rollers connected to the two cylinders are squeezed on the guide track to increase the friction force and reduce the falling speed of the lifting assembly;

[0021] (2) A plurality of blocking mechanisms are arranged on the moving track of the track frame through the lifting assembly, and a spring is arranged on the inflation cylinder of the inflation mechanism, so that the inflation cylinder is reset under the action of the spring after one inflation, and in the process of continuing to fall, the multiple blocking mechanisms act on the inflation mechanism in turn, so that the inflation cylinder inflates the cylinder multiple times, continuously increasing the friction force of the buffer roller on the guide track, thereby further reducing the falling speed of the lifting assembly.

[0022] (3) The conveyor rails are distributed on the upper, middle and lower layers and placed at the front and rear ends of the track frame. The front end is the conveyor rail for conveying workpieces on the upper, middle and lower layers, and the rear end is the conveyor rail for workpiece assembly, light maintenance of workpieces and heavy maintenance of workpieces. The load-bearing rails are placed on the lifting assembly and move synchronously with the lifting assembly. The load-bearing rails are connected to the upper, middle and lower conveyor rails through vertical displacement switching, so as to realize the rapid connection and production of production lines between three layers and above of heavy-load workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

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

[0025] Figure 2 It is a schematic diagram of a single-sided three-dimensional structure of the present invention;

[0026] Figure 3 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0027] Figure 4 It is a schematic diagram of the blocking mechanism structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the upper conveyor rail docking structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the middle-layer conveyor rail docking structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the lower conveyor rail docking structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the light maintenance structure of the assembly components of the present invention;

[0032] Fig. 9 It is a schematic diagram of the heavy maintenance structure of the assembly components of the present invention;

[0033] Fig.10 It is a schematic diagram of the assembly structure of the assembly parts of the present invention.

[0034] Legend: 1. Track frame; 2. Guide track; 3. Counterweight assembly; 31. Counterweight wheel; 4. Lifting assembly; 41. Lifting wheel; 42. Buffer roller; 43. Inflator; 44. Lifting frame; 5. Motor; 6. Transmission belt; 7. Blocking mechanism; 8. Assembly parts; 9. Carrying vehicle; 91. Electric drive wheel set; 10. Load-bearing track; 11. Conveyor rail; 1101. First conveyor rail; 1102. Second conveyor rail; 1103. Third conveyor rail; 1104. Fourth conveyor rail; 1105. Fifth conveyor rail; 1106. Sixth conveyor rail. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0036] like Figure 1-Figure 10As shown, a multi-way vertical switching device for a load-bearing track of the present invention comprises a track frame 1 and a lifting assembly 4, a counterweight assembly 3, a transmission assembly and a load-bearing track 10 arranged on the track frame 1, the load-bearing track 10 is placed on the lifting assembly 4, and moves synchronously with the lifting assembly 4, a multi-layer conveyor rail 11 is arranged at the front and rear ends of the track frame 1, the load-bearing track 10 is docked with the multi-layer conveyor rail 11 through vertical displacement switching, the carrier 9 transports the assembly component 8 to change the working position through the driving wheel group, the transmission assembly comprises a motor 5, a roller and a transmission belt 6, the roller is connected to the output shaft of the motor 5, the transmission belt 6 rolls and fits on the roller, and the two ends are respectively connected to the lifting assembly 4 and the counterweight assembly 3; specifically, the motor 5 is arranged at the top of the track frame 1, the lifting assembly 4 and the counterweight assembly 3 are located on both sides of the track frame 1, and the transmission belt 6 is respectively connected to the lifting assembly 4 and the counterweight assembly 3 after rolling and fitting with the roller, and the lifting assembly 4 is driven to rise and fall to the corresponding height by the rotation of the motor 5 and the gravity of the counterweight assembly 3;

[0037] Since the elevator is generally driven by a chain or a transmission belt 6, and the transmission of the chain and the transmission belt 6 has the risk of disconnection, or the driving motor 5 fails and loses the driving function, the lifting mechanism on the elevator will fall rapidly under the action of gravity, which is likely to cause safety hazards;

[0038] Therefore, in order to ensure safety after a device failure, the lifting assembly 4 includes a lifting frame 44, an inflating mechanism and a buffer mechanism. The inflating mechanism and the buffer mechanism are arranged on the lifting frame 44. The inflating mechanism is connected with the buffer mechanism. A vertically placed guide track 2 and a blocking mechanism 7 are arranged on the track frame 1. The buffer mechanism is slidably arranged on both sides of the guide track 2. The inflating mechanism and the blocking mechanism 7 resist a force to inflate the buffer mechanism.

[0039] The buffer mechanism is slidably arranged on both sides of the guide rail 2. On the one hand, the guide rail 2 is used to limit the moving direction of the lifting component 4 to prevent the lifting component 4 from deviating in movement. On the other hand, the buffer mechanism is connected with the inflation mechanism, and the inflation mechanism can fill the buffer mechanism with gas. When the gas in the buffer mechanism gradually increases, the fit between the buffer mechanism and the guide rail 2 becomes tighter, which can provide greater friction for deceleration during rapid falling. The inflation mechanism will abut against the blocking mechanism 7 on the track frame 1 during movement. When the lifting component 4 descends at a normal working speed, the inflation mechanism will abut against the blocking mechanism 7 on the track frame 1 during the descent process. After the inflatable mechanism abuts against the blocking mechanism 7, the compressed gas will be slowly released to the outside of the inflatable mechanism instead of being filled into the buffer mechanism. After the inflatable mechanism abuts against the blocking mechanism 7 and receives force, the inflatable mechanism is slowly compressed back, so that the lifting frame 44 drives the object to be carried to move up and down. When the equipment fails and causes the lifting component 4 to fall rapidly, the compressed gas in the inflatable mechanism will not have time to be released to the outside after the inflatable mechanism abuts against the blocking mechanism 7, causing the gas in the inflatable mechanism to be quickly filled into the buffer mechanism, so that the buffer mechanisms on both sides of the guide track 2 apply pressure to the guide track 2, thereby slowing down the lifting component 4 and improving the safety after equipment failure.

[0040] In order to make the lifting frame 44 slide up and down more smoothly, the lifting assembly 4 also includes a lifting roller group, and the counterweight assembly 3 includes a counterweight frame and a counterweight roller group. The lifting roller group and the counterweight roller group are respectively arranged on the lifting frame 44 and the counterweight frame, and roll against the track frame 1;

[0041] The lifting frame 44 is used to place objects that need to be lifted and moved, and the counterweight frame is used to place counterweight blocks. The number of counterweight blocks is adjusted according to the weight of the objects that need to be transported during the production process. A lifting roller group is set on the lifting frame 44 to roll with the track frame 1 to reduce the friction with the track frame 1, and a counterweight roller group is set on the counterweight frame to roll with the track frame 1 to reduce the friction with the track frame 1. At the same time, the lifting frame 44 and the counterweight frame move along the rolling abutment direction with the track frame 1.

[0042] In one embodiment, the track frame 1 includes a plurality of interconnected I-shaped channel steels, the lifting roller group and the counterweight roller group include a plurality of lifting wheels 41 and a counterweight wheel 31, respectively, and the plurality of lifting wheels 41 and the plurality of counterweight wheels 31 are respectively relatively abutted against the side walls of the I-shaped channel steels;

[0043] Specifically, the lifting frame 44 is provided with four groups of lifting roller groups, each group has two lifting wheels 41, and the four groups of lifting roller groups are respectively arranged on both sides of the lifting frame 44, and the rim surfaces of the two lifting wheels 41 on each group of lifting roller groups are arranged opposite to each other, and the rim surfaces of the two lifting wheels 41 roll and abut one of the side walls of the I-shaped channel steel in the middle, and the two lifting wheels 41 move along the side wall of the I-shaped channel steel. The two lifting wheels 41 abut against the side wall of the I-shaped channel steel can reduce the vibration and the small displacement generated during the lifting process; and the counterweight frame is also provided with four groups of counterweight roller groups, each group of counterweight roller groups Three counterweight wheels 31 are arranged on the weight roller group, of which two counterweight wheels 31 are the same as the lifting roller group, and the two wheel rim surfaces are relatively abutted on the other side surface of the I-shaped channel steel, and the remaining counterweight wheel 31 is arranged perpendicular to the other two counterweight wheels 31, and is also abutted against the inner wall of the I-shaped channel steel. The vertically arranged counterweight wheels 31 on the relatively arranged counterweight roller groups are relatively abutted against the corresponding I-shaped channel steel, and the forces acting on them are opposite, which can also reduce the displacement of the counterweight frame and reduce the horizontal vibration of the counterweight frame, and the rotation direction of the three counterweight wheels 31 is the same as the moving direction of the counterweight frame.

[0044] In one embodiment, the buffer mechanism includes two cylinders disposed oppositely on the lifting frame 44, and buffer rollers 42 are disposed on both cylinders. The two buffer rollers 42 roll against two opposite sides of the guide track 2, and both cylinders are connected to the inflation mechanism.

[0045] The structure is the same as that of a general cylinder, and the cylinders all include a telescopic rod, and the buffer roller 42 is rotatably set on the telescopic rod of the cylinder. The telescopic length of the telescopic rod is controlled by the size of the air cavity pressure in the cylinder, and the two relatively arranged cylinders are both connected to the inflation mechanism. When the motor 5 fails or the transmission belt 6 fails, causing the counterweight assembly 3 and the lifting assembly 4 to rise and fall rapidly, the inflation mechanism on the lifting assembly 4 abuts against the blocking mechanism 7 set on the track frame 1 during rapid movement. Under the action of the gravitational potential energy of the lifting assembly 4 or the counterweight assembly 3, the inflation mechanism abuts against the force and inflates gas into the two cylinders, thereby increasing the pressure in the air cavity in the cylinder, pushing the telescopic rod on the cylinder to extend outward, and causing the two buffer rollers 42 to apply a force to the guide rail 2, so as to increase the friction force of the buffer roller 42 on the guide rail 2, thereby achieving deceleration of the lifting assembly 4 and the counterweight assembly 3.

[0046] Since the lifting assembly 4 needs to be frequently lifted and lowered during use, and it will perform reciprocating motion on the track frame 1 during the lifting process, and the inflation mechanism on the lifting assembly 4 can only fill gas into the two cylinders after it abuts against the blocking mechanism 7 on the track frame 1, in order to prevent the inflation mechanism from triggering the action of inflating the cylinders after the abutment between the inflation mechanism and the blocking mechanism 7 during the normal operation of the lifting assembly 4, in one embodiment, the inflation mechanism includes an inflation cylinder 43 and a pressure relief valve, and the pressure relief valve is arranged on the side wall of the inflation cylinder 43;

[0047] The pressure relief valve is used to release the gas in the inflation mechanism. When the lifting assembly 4 and the counterweight assembly 3 are lifted normally, the lifting speed is relatively constant and slow to ensure the safety of the object being lifted. Therefore, when the lifting assembly 4 and the counterweight assembly 3 are lifted slowly, although the inflation mechanism will also abut against the blocking mechanism 7, the speed of mutual contact is slow, and the compression speed of the inflation cylinder 43 of the inflation mechanism is lower than the maximum pressure relief speed of the pressure relief valve. Therefore, although the inflation cylinder 43 is compressed, no gas is filled into the cylinder, so the buffer assembly will not act at normal speed;

[0048] When the motor 5 fails or the lifting assembly 4 and the counterweight assembly 3 fall rapidly, due to their high speed, the speed at which the inflation mechanism contacts the blocking mechanism 7 is fast, and the compression speed of the inflation cylinder 43 on the inflation mechanism is fast, resulting in the inflation speed of the inflation cylinder 43 being faster than the pressure relief speed of the pressure relief valve. Therefore, part of the gas will be released from the pressure relief valve, and the other part of the gas will be filled into the cylinder and drive the buffer roller 42 and the guide rail 2 to squeeze and decelerate. At the same time, after the inflation mechanism contacts the blocking mechanism 7, the inflation cylinder 43 releases part of the pressure through the pressure relief valve and can also absorb part of the gravitational potential energy of the lifting mechanism.

[0049] When a pressure relief valve is provided on the inflation tube 43, part of the gas will be released. Since the inflation tube 43 is connected to the cylinder, after the lifting assembly 4 falls, the inflation tube 43 is used to inflate the cylinder to decelerate the lifting assembly 4. However, the excess gas will be released through the pressure relief valve, resulting in the inflation mechanism's effect on the cylinder being maintained for only a short time. In order to extend the deceleration time of the inflation mechanism, in one embodiment, a one-way valve is provided on the air pipe connecting the two cylinders to the inflation tube 43. By providing a one-way valve on the air pipe or the cylinder, after the gas is filled into the cylinder through the inflation tube 43, the gas in the air cavity of the cylinder is difficult to leak out, so that the cylinder maintains pressure and continues to apply force to the guide track 2 through the buffer roller 42 to decelerate.

[0050] Since the weight of the lifting assembly 4 and the counterweight assembly 3 is generally large, it may not be possible to satisfy the deceleration effect of the lifting assembly 4 and the counterweight assembly 3 by only inflating the cylinder once. In order to further improve the deceleration effect, in one embodiment, a spring is sleeved on the inflation cylinder 43, one end of the spring abuts on the inflation cylinder 43, and the other end abuts on the lifting frame 44;

[0051] The inflatable cylinder 43 includes a fixed section and a telescopic section. The inflatable cylinder 43 compresses air by telescoping the fixed section and the telescopic section. Specifically, the fixed section and the telescopic section can be placed horizontally. When the telescopic section abuts against the blocking mechanism 7, the telescopic section can be retracted in the horizontal direction, and extended in the horizontal direction when reset. The fixed section and the telescopic section of the inflatable cylinder 43 can also be set according to the specific conditions of the equipment. By abutting the spring against the telescopic section and the lifting frame 44, during the falling process of the lifting assembly 4 and the counterweight assembly 3, the inflatable mechanism abuts against the blocking mechanism 7 to inflate after receiving the force. The cylinder 43 produces a compression action. At this time, the two cylinders push the buffer rollers 42 to apply pressure to the guide rail 2 to form a deceleration action, and then the fixed section and the telescopic section of the inflatable cylinder 43 are reset and stretched under the action of the spring. Since the gravitational potential energy of the lifting component 4 is large and a spring is provided on the inflatable cylinder 43, the lifting component 4 will rebound under the action of the spring after rapid deceleration and then continue to decelerate and fall. After falling again, the inflatable cylinder 43 will be compressed again, so that the inflatable cylinder 43 will inflate the cylinder again, further increasing the pressure of the cylinder and improving the deceleration effect.

[0052] In one embodiment, the blocking mechanism 7 includes a telescopic bracket and a blocking wheel, the telescopic bracket is arranged on the track frame 1, the blocking wheel is rotatably arranged on the telescopic bracket, a blocking block is arranged on the inflatable cylinder 43, and the abutment between the blocking block and the blocking wheel is an inclined surface;

[0053] In order to make the blocking mechanism 7 able to abut and cooperate with the inflation mechanism when the lifting assembly 4 and the counterweight assembly 3 fall rapidly, and to avoid the blocking mechanism 7 from causing greater interference when the lifting assembly 4 and the counterweight assembly 3 slide up and down normally, the blocking mechanism 7 is in a retractable state. When the lifting assembly 4 falls rapidly, the force exerted by the inflation mechanism on the blocking mechanism 7 is divided into vertical force and horizontal force. The vertical force component is used to compress and inflate the inflation mechanism, while the horizontal force component is used to shorten the blocking mechanism 7 to one side. Therefore, the lifting assembly 4 slowly descends under normal working conditions, which will buffer and squeeze the blocking mechanism 7 to one side. Only when it falls rapidly can the force exerted by the blocking mechanism 7 on the inflation tube 43 be quickly compressed for inflation.

[0054] In one embodiment, a plurality of blocking mechanisms 7 are provided on the track frame 1 along the moving direction of the lifting assembly 4; since the lifting assembly 4 and the counterweight assembly 3 may not be able to be completely decelerated by only a single blocking mechanism 7, a plurality of blocking mechanisms 7 are provided on the track frame 1, and the contact force of the plurality of blocking mechanisms 7 with the inflation mechanism is reduced successively from top to bottom.

[0055] Since the weights of the lifting assembly 4 and the counterweight assembly 3 are different, and the lifting assembly 4 and the counterweight assembly 3 may both be on the heavier side, the above embodiment is only applicable to the buffering of the falling when the lifting assembly 4 is on the heavier side. In order to enable the counterweight assembly 3 to also produce a buffering effect when the counterweight assembly 3 is on the heavier side, a group of inflating mechanisms and blocking mechanisms 7 can also be set on one side of the counterweight assembly 3. At the same time, in order to avoid the interference of the blocking mechanism 7 with the lifting assembly 4 and the counterweight assembly 3, the blocking mechanism 7 can be a swingable structure, that is, the telescopic bracket of the blocking mechanism 7 is hinged to the track frame 1, and can only swing upward but not downward. Therefore, when the lifting assembly 4 and the counterweight assembly 3 slide upward, the blocking mechanism 7 will swing upward after abutting against the lifting assembly 4 and the counterweight assembly 3, and cannot produce a large interference with the lifting assembly 4 and the counterweight assembly 3. When the lifting assembly 4 and the counterweight assembly 3 fall rapidly, they can abut and cooperate with the inflating mechanism.

[0056] like Figure 2 As shown, the conveyor rail 11 includes a first conveyor rail 1101, a second conveyor rail 1102, a third conveyor rail 1103, a fourth conveyor rail 1104, a fifth conveyor rail 1105 and a sixth conveyor rail 1106. The conveyor rails 11 are distributed in the upper, middle and lower layers and are placed at the front and rear ends of the track frame 1. The front end is the conveyor rail 11 for conveying workpieces in the upper, middle and lower layers, and the rear end is the conveyor rail 11 for installing the workpiece assembly, the conveyor rail 11 for light maintenance of the workpiece and the conveyor rail 11 for heavy maintenance of the workpiece. The motor 5 drives the lifting component 4 to move up and down through the transmission belt 6. The load-bearing rail 10 is placed on the lifting component 4 and moves synchronously with the lifting component 4. The load-bearing rail 10 is docked with the upper, middle and lower conveyor rails 11 through vertical displacement switching. When the first conveyor rail 1101 is docked with the fourth conveyor rail 1104, the electric drive The travel route of the wheel group 91 is the first conveyor rail 1101, the load-bearing rail 10, and the fourth conveyor rail 1104. The electric drive wheel group 91 can be used to transport workpieces on the conveyor rail 11. When the first conveyor rail 1101 is docked with the fifth conveyor rail 1105, the travel route of the electric drive wheel group 91 is the first conveyor rail 1101, the load-bearing rail 10, and the fifth conveyor rail 1105. When the first conveyor rail 1101 is docked with the sixth conveyor rail 1106, the travel route of the electric drive wheel group 91 is the first conveyor rail 1101, the load-bearing rail 10, and the sixth conveyor rail 1106. Similarly, the second conveyor rail 1102 and the third conveyor rail 1103 can also be docked with the fourth conveyor rail 1104, the fifth conveyor rail 1105 and the sixth conveyor rail 1106, respectively, thereby realizing the rapid docking production of production lines between three layers and above of heavy-load workpieces.

[0057] In one embodiment, when the upper conveying rail 11 is docked, Figure 5As shown, the lifting component 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the first conveying rail 1101 and the fourth conveying rail 1104. The first conveying rail 1101, the load-bearing rail 10, and the second conveying rail 1102 are connected in pairs in sequence, and the carrier vehicle 9 transports the assembly component 8 from the first conveying rail 1101 to the load-bearing rail 10, and then from the load-bearing rail 10 to the fourth conveying rail 1104, completing the work station transformation of the assembly component 8.

[0058] When the middle conveyor rail 11 is docked, Figure 6 As shown, the lifting assembly 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the second conveying rail 1102 and the fifth conveying rail 1105. The second conveying rail 1102, the load-bearing rail 10, and the fifth conveying rail 1105 are connected in pairs in sequence, and the carrier vehicle 9 transports the assembly component 8 from the second conveying rail 1102 to the load-bearing rail 10, and then from the load-bearing rail 10 to the fifth conveying rail 1105, completing the work station transformation of the assembly component 8.

[0059] When the lower conveyor rail 11 is docked, Figure 7 As shown, the lifting component 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the third conveying rail 1103 and the sixth conveying rail 1106. The third conveying rail 1103, the load-bearing rail 10, and the sixth conveying rail 1106 are connected in pairs in sequence, and the carrier vehicle 9 transports the assembly component 8 from the third conveying rail 1103 to the load-bearing rail 10, and then from the load-bearing rail 10 to the sixth conveying rail 1106, completing the work station transformation of the assembly component 8.

[0060] When the assembly component 8 needs minor maintenance, such as Figure 8 As shown, the lifting component 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the fifth conveying rail 1105, the load-bearing rail 10 is docked with the fifth conveying rail 1105, and the carrier vehicle 9 transports the assembly component 8 from the load-bearing rail 10 to the fifth conveying rail 1105, and the assembly component 8 enters the light maintenance station for maintenance. After the maintenance is completed, the carrier vehicle 9 transports the assembly component 8 from the fifth conveying rail 1105 to the load-bearing rail 10, and the lifting component 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the fourth conveying rail 1104, completing the light maintenance of the assembly component 8.

[0061] When the assembly component 8 needs heavy maintenance, such as Fig. 9As shown, the lifting component 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the sixth conveying rail 1106, the load-bearing rail 10 is docked with the sixth conveying rail 1106, and the carrier vehicle 9 transports the assembly component 8 from the load-bearing rail 10 to the sixth conveying rail 1106, and the assembly component 8 enters the heavy maintenance station for maintenance. After the maintenance is completed, the carrier vehicle 9 transports the assembly component 8 from the sixth conveying rail 1106 to the load-bearing rail 10, and the lifting component 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the fourth conveying rail 1104, completing the heavy maintenance of the assembly component 8.

[0062] When the assembly component 8 is assembled, as shown Fig.10 As shown, the lifting component 4 drives the load-bearing rail 10 to lift and move, and stops when the height of the load-bearing rail 10 is flush with the fourth conveying rail 1104, the load-bearing rail 10 is docked with the fourth conveying rail 1104, and the carrier vehicle 9 transports the assembly component 8 from the load-bearing rail 10 to the fourth conveying rail 1104, and the assembly component 8 enters the assembly station for assembly. After the assembly installation is completed, the carrier vehicle 9 transports the assembly component 8 from the fourth conveying rail 1104 to the next station to complete the assembly installation of the assembly component 8.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A multi-way vertical switching device for a load-bearing track, characterized in that: It includes a track frame and a lifting assembly, a counterweight assembly, a transmission assembly and a load-bearing track arranged on the track frame. The load-bearing track is placed on the lifting assembly and moves synchronously with the lifting assembly. Multi-layer conveyor rails are arranged at the front and rear ends of the track frame. The load-bearing track is docked with the multi-layer conveyor rails through vertical displacement switching. The transmission assembly includes a motor, a roller and a transmission belt. The roller is transmission-connected to the output shaft of the motor. The transmission belt rolls and fits on the roller, and the two ends of the transmission belt are respectively connected to the lifting assembly and the counterweight assembly. The lifting assembly includes a lifting frame, an inflating mechanism and a buffer mechanism, wherein the inflating mechanism and the buffer mechanism are arranged on the lifting frame, the inflating mechanism is connected with the buffer mechanism, the track frame is provided with a guide track and a blocking mechanism, the buffer mechanism is slidably arranged on both sides of the guide track, and the inflating mechanism and the blocking mechanism resist a force to inflate the buffer mechanism; The buffer mechanism comprises two cylinders arranged opposite to each other on the lifting frame, and buffer rollers are arranged on the two cylinders, and the two buffer rollers roll and abut against two opposite sides of the guide track, and the two cylinders are connected with the inflation mechanism; the inflation mechanism comprises an inflation cylinder and a pressure relief valve, and the pressure relief valve is arranged on the side wall of the inflation cylinder; a one-way valve is arranged on the air pipe connecting the two cylinders with the inflation cylinder; The lifting frame descends at a normal speed and slowly contacts the blocking mechanism on the track frame, pushing the gas in the inflatable cylinder to be slowly released from the pressure relief valve to the outside; the lifting frame falls due to a failure and quickly contacts the blocking mechanism on the track frame, pushing the gas in the inflatable cylinder to be compressed into the cylinder for buffering and deceleration; The blocking mechanism comprises a telescopic bracket and a blocking wheel, wherein the telescopic bracket is arranged on the track frame, the blocking wheel is rotatably arranged on the telescopic bracket, a blocking block is arranged on the inflatable cylinder, and the abutment portion between the blocking block and the blocking wheel is an inclined surface.

2. A multi-way vertical switching device for a load-bearing track according to claim 1, characterized in that: The lifting assembly also includes a lifting roller group, and the counterweight assembly includes a counterweight frame and a counterweight roller group. The lifting roller group and the counterweight roller group are respectively arranged on the lifting frame and the counterweight frame, and are in rolling contact with the track frame.

3. A multi-way vertical switching device for a load-bearing track according to claim 2, characterized in that: The track frame includes a plurality of interconnected I-shaped channel steels, the lifting roller group and the counterweight roller group include a plurality of lifting wheels and a counterweight wheel respectively, and the plurality of lifting wheels and the plurality of counterweight wheels are respectively relatively abutted against the side walls of the I-shaped channel steels.

4. A multi-way vertical switching device for a load-bearing track according to claim 1, characterized in that: A spring is sleeved on the inflatable cylinder, one end of the spring abuts against the inflatable cylinder, and the other end abuts against the lifting frame.

5. A multi-way vertical switching device for a load-bearing track according to claim 1, characterized in that: A plurality of blocking mechanisms are arranged on the track frame along the moving direction of the lifting assembly.

6. A multi-way vertical switching device for a load-bearing track according to claim 1, characterized in that: The conveyor rails are divided into upper, middle and lower layers, and are placed at the front and rear ends of the track frame. The front end is the upper, middle and lower layers of conveyor rails, and the rear end is the conveyor rails for workpiece assemblies, light maintenance of workpieces and heavy maintenance of workpieces.

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