A fixed car lift

Abstract

The present invention relates to the technical field of overhaul and underbody maintenance operation equipment for subway trains, and discloses a bogie lifting unit, a car body support unit and a steel structure bearing platform. The bogie lifting unit and the car body support unit are both installed below the steel structure bearing platform on both sides of the track. The steel structure bearing platform includes a cover plate unit and a cover plate support unit. The cover plate unit is fixed in the foundation pit through the cover plate support unit. The cover plate unit includes a fixed cover plate. Below the fixed cover plate, there are provided a lifting rail following cover plate for filling the vacant area after the lifting rail in the bogie lifting unit rises and a car body support following cover plate for filling the vacant area after the car body support unit rises. The lifting rail following cover plate is connected to the cover plate support unit through a bogie automatic following mechanism, and the car body support following cover plate is connected to the cover plate support unit through a car body automatic following mechanism, having advantages such as good safety and strong reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of overhaul and underbody maintenance equipment for subway trains, and particularly relates to a fixed car lift. Background Art

[0002] The fixed car lift is one of the five major vehicle maintenance process equipment in the subway depot. It is mainly used for the overhaul and underbody maintenance of subway trains and belongs to special car lifting equipment. The fixed car lift is used for the replacement of the entire train's bogies, the disassembly, assembly, and maintenance of vehicles. The underground fixed car lift can replace all the bogies in the entire train formation at the same time, or replace any bogie in the entire train formation.

[0003] The invention patent with the authorization announcement number CN104568094B discloses a fixed car lift and overhaul device with a vehicle weighing function. The present invention relates to a railway locomotive and vehicle maintenance equipment. Specifically, it relates to a fixed car lift and overhaul device with a vehicle weighing function, mainly including a bogie lifting mechanism, a car body lifting mechanism, a steel structure bearing platform, and a weighing unit module. This overhaul device can lift the entire vehicle through the bogie lifting mechanism and the car body lifting mechanism without disassembling the entire train, and can disassemble, install, and replace any bogie of the vehicle and perform overhaul and replacement operations on the electrical facilities under the car body. Moreover, it can measure the axle weight, bogie weight, vehicle weight, side weight of the vehicle, as well as the average value of the single-wheel weight and the plane coordinates of the vehicle's center of gravity without changing the working station, so as to further perform operations such as car lifting and spring adjustment at the same working station. When this device performs the lifting operation, the car body lifting column 2 is fixed to both sides of the car body, and the motor drives the bogie lifting column 1 to rise, driving the car body to rise. At the same time, the lifting rail 3 contacts the wheel tread and fully bears the load. The motor drives the bogie lifting column 1 to rise, thereby driving the lifting rail 3 to rise. The lifting rail 3 lifts the bogie until the car body is lifted by the bogie lifting mechanism to a corresponding height of the steel structure bearing platform 4, and the vehicle bogie can be replaced and the electrical equipment under the car can be repaired. However, at this time, since the lifting rail 3 rises from the surface of the steel structure bearing platform 1, there will be a large gap at the position corresponding to the lifting rail 3 on the steel structure bearing platform. When workers walk on the steel structure bearing platform 1 during maintenance, there is a risk of stepping into the void or tools falling from the gap, resulting in certain potential safety hazards.

[0004] The utility model patent with the authorization announcement number CN209797367U discloses a plate-following mechanism for a fixed car lift, which includes a machine base, a fixed cover plate, a lifting column and a lifting beam, and also includes a following cover plate and a gas spring sleeve. The gas spring sleeve is arranged on the machine base, and a gas spring connected to the following cover plate is arranged inside the gas spring sleeve. The gas spring can move up and down inside the gas spring sleeve. The utility model uses the gas spring to drive the following cover plate to automatically rise with the lifting column and the lifting beam, and can automatically stop after reaching the position, and has a certain supporting force to ensure the safety of operators. When the lifting column and the lifting beam descend, the following cover plate can also fall with them. The above actions are all automatic and do not require manual intervention. The structure is simple and the performance is safe and reliable. After the lifting column and the lifting beam of the car lift rise, it automatically fills the gap of the fixed cover plate to prevent workpieces, tools, etc. from falling into the gap and the foundation pit, and provides safety protection for the operators to avoid the gap of the fixed cover plate from causing harm to people. However, when the gas spring drives the following cover plate to rise with the lifting column and the lifting beam and supports the staff, the gas spring is always under a large bearing capacity, and the service life of the gas spring itself is relatively short. It is easy to be damaged under long-term load, which not only has a large safety risk, but also has a relatively high cost, and the maintenance cost of the equipment is high. Summary of the Invention

[0005] The purpose of the present invention is to provide a fixed car lift, aiming to solve the problem that the gas spring driving the following cover plate in the existing car lift is prone to damage due to long-term load, and has the advantages of good safety and strong reliability.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions:

[0007] A fixed car lift includes a bogie lifting unit, a vehicle body support unit and a steel structure bearing platform. The bogie lifting unit and the vehicle body support unit are both installed below the steel structure bearing platform on both sides of the track. The steel structure bearing platform includes a cover plate unit and a cover plate support unit. The cover plate unit is fixed in the foundation pit through the cover plate support unit. The cover plate unit includes a fixed cover plate. Below the fixed cover plate, there are a lifting rail following cover plate for filling the vacant area after the lifting rail in the bogie lifting unit rises and a vehicle body support following cover plate for filling the vacant area after the vehicle body support unit rises. The lifting rail following cover plate is connected to the cover plate support unit through a bogie automatic following mechanism, and the vehicle body support following cover plate is connected to the cover plate support unit through a vehicle body automatic following mechanism.

[0008] By adopting the above technical solutions, the bogie lifting unit and the car body support unit are used to lift the bogie and the car body, facilitating the disassembly, replacement of the bogie of the vehicle and the maintenance and replacement operations of the electrical facilities under the car body. The cover plate support unit in the steel structure bearing platform is used to fix the support of the cover plate and the connection between the bogie lifting unit and the car body support unit and the civil engineering foundation pit, so that the whole equipment is placed below the ground plane. Among them, the fixed cover plate in the steel structure bearing platform is used to completely cover the equipment in the foundation pit. At the same time, the upper surface of the fixed cover plate is flush with the ground and there are no obstacles, effectively ensuring the safety needs for the maintenance operation vehicle and personnel to pass. During the car lifting operation, the bogie lifting unit and the car body support unit rise out of the ground. After the operation is completed, the bogie lifting unit and the car body support unit descend below the ground. When the bogie lifting unit and the car body support unit rise out of the ground, the bogie automatic following mechanism and the car body automatic following mechanism respectively drive the lifting rails under the fixed cover plate to follow the cover plate and the car body support to follow the cover plate to rise synchronously in sequence and respectively fill the vacant areas after the lifting rails in the bogie lifting unit and the car body support unit rise, ensuring that the lifting rails following the cover plate and the car body support following the cover plate are flush with the upper surface of the fixed cover plate and additionally providing sufficient supporting force, providing a good operation platform and supporting force for the maintenance operation personnel, which can not only provide safety protection for the operators, avoid the gaps in the fixed cover plate from causing harm to the personnel, but also prevent people, workpieces, tools, etc. from falling into the gaps and foundation pits. It is not only convenient for operation but also has good safety performance.

[0009] The further setting of the present invention is that: the lifting rail following cover plate includes a longitudinal beam parallel to the track and two cross beams perpendicular to the longitudinal beam symmetrically fixed at both ends of the longitudinal beam. At one end where the two cross beams are connected to the longitudinal beam and at the other ends of the two cross beams, there are bogie automatic following mechanisms. The bogie automatic following mechanism includes a gas spring. The upper end of the gas spring is connected to the cross beam or the longitudinal beam in the lifting rail following cover plate, and the lower end of the gas spring is respectively connected to the cover plate support beam in the cover plate support unit through a gas spring bracket.

[0010] By adopting the above technical solutions, the longitudinal beam and the cross beam of the lifting rail following cover plate are respectively opposite to the vacant areas after the lifting rails on the fixed cover plate. When the lifting rails rise, the lifting rail following cover plate under the fixed cover plate rises to a certain height under the drive of the bogie automatic following mechanism, so as to fill the vacant areas on the fixed cover plate after the lifting rails rise. When the lifting rails rise, the lifting rail following cover plate moves upward under the elastic force of the gas spring in the bogie automatic following mechanism until the lifting rails reach the set height. At this time, the lifting rail following cover plate just fills the vacant areas after the lifting rails rise, ensuring that the upper surface of the lifting rail following cover plate is exactly flush with the upper surface of the fixed cover plate.

[0011] A further setting of the present invention is that guiding and bearing mechanisms are respectively arranged on both sides of the gas spring. The guiding and bearing mechanism includes a guiding cylinder and a guiding rod. The guiding cylinder is fixedly connected to a cover plate support beam in the cover plate support unit through a guiding cylinder fixing plate. The guiding rod is fixedly connected to a cross beam or a longitudinal beam in the lifting rail follower cover plate. The guiding rod is longitudinally slidably matched with the guiding cylinder. Two V-shaped grooves with openings facing upward are distributed up and down on the side wall of the guiding cylinder. The two ends of the two V-shaped grooves are connected through a connecting groove to form a closed groove. A plurality of one-way adjusting devices for controlling the sliding pin to only slide unidirectionally along the closed groove formed by the connection of the two V-shaped grooves through the connecting groove are respectively arranged on the side walls of the two V-shaped grooves and the connecting groove at both ends. A connecting rod is arranged on the guiding rod. A sliding pin is arranged in the closed groove of the guiding cylinder. The upper end of the connecting rod is rotatably connected to the guiding rod, and the lower end of the connecting rod is rotatably connected to the sliding pin.

[0012] By adopting the above technical solution, the guiding and bearing mechanism is used, on the one hand, to guide the up-and-down movement of the gas spring, so that the lifting rail has better stability when following the cover plate up and down, and effectively ensures that the lifting rail following the cover plate can always have good alignment with the vacant area after the lifting rail on the fixed cover plate rises, avoiding the interference between the lifting rail following the cover plate and other structures, and effectively improving the reliability of the equipment. On the other hand, it is also used to support the lifting rail following the cover plate. When the lifting rail is not raised, the gas spring is compressed to the shortest. At this time, the sliding pin connected to the lowermost end of the connecting rod on the guiding rod is located at the lowermost end of the V-shaped groove on the side wall of the guiding cylinder. The guiding rod is supported in this V-shaped groove through the connecting rod, so that the guiding rod and the guiding cylinder are axially relatively fixed to form a stable support. When the lifting rail needs to perform a lifting operation, first control the lifting rail to rise a certain height, so that the gas spring jacks up the lifting rail following the cover plate upward. At the same time, the guiding rod rises synchronously with the lifting rail following the cover plate, so that the connecting rod on the guiding rod rises synchronously with the guiding plate. When the connecting rod rises, its lower end will drive the sliding pin to slide from the lowest point of the V-shaped groove on the side wall of the guiding cylinder at the bottom to the highest point of the V-shaped groove at the top along the connecting groove under the action of the one-way adjustment device. At this time, the upper surface of the lifting rail following the cover plate is higher than the upper surface of the fixed cover plate. Then control the lifting rail to fall back a certain height and then remain stationary. When the lifting rail falls back, the compressed gas spring causes the lifting rail following the cover plate to fall back synchronously until the upper surface of the lifting rail following the cover plate is flush with the upper surface of the fixed cover plate, so as to ensure that the lifting rail following the cover plate fills the vacant area on the fixed cover plate. During this process, the sliding pin connected to the lowermost end of the connecting rod on the guiding rod slides from the highest point of the V-shaped groove on the side wall of the guiding cylinder at the top to the lowermost point of the V-shaped groove on the side wall of the guiding cylinder at the top under the action of the one-way adjustment device. At this time, the guiding rod is supported in the V-shaped groove on the side wall of the guiding cylinder at the top through the connecting rod, and the guiding rod and the guiding cylinder are axially relatively fixed to form a stable support;After the lifting rail completes the lifting operation, first control the lifting rail to rise by a certain height, so that the gas spring pushes the lifting rail and the following cover plate upward, and at the same time the guide rod rises synchronously with the lifting rail and the following cover plate, so that the connecting rod on the guide rod rises synchronously with the guide plate. When the connecting rod rises, its lower end will drive the sliding pin to slide from the lowest point of the uppermost V-shaped groove on the side wall of the guide cylinder to the highest point of the uppermost V-shaped groove under the action of the one-way adjustment device. Then control the lifting rail to descend to a position where its upper surface is flush with the upper surface of the fixed cover plate. At the same time, the guide rod descends synchronously with the lifting rail and the following cover plate, so that the connecting rod on the guide rod descends synchronously with the guide plate. When the connecting rod descends, its lower end will drive the sliding pin to slide from the highest point of the uppermost V-shaped groove on the side wall of the guide cylinder along the connecting groove in sequence to the lowest point of the lowermost V-shaped groove. At this time, the guide rod is supported in the lowermost V-shaped groove on the side wall of the guide cylinder through the connecting rod. The guide rod and the guide cylinder are axially relatively fixed to form a stable support, ensuring that the bearing capacity exerted by the lifting rail following the cover plate on the gas spring is dispersed on the guide rod and the guide cylinder, which not only greatly reduces the load on the gas spring, effectively reduces the probability of gas spring damage, thus effectively reducing the failure rate and maintenance cost of the equipment, but also can effectively avoid the problem of safety accidents caused by the sudden fracture or failure of the gas spring resulting in the fall of the lifting rail following the cover plate, further improving the reliability of the equipment.

[0013] The further setting of the present invention is that: the one-way adjustment device includes a one-way adjustment groove provided on the side wall of the V-shaped groove or the connecting groove. A one-way adjustment block is provided in the one-way adjustment groove. One end of the one-way adjustment block is hinged to a wedge block. The wedge block is fixed on one side of the one-way adjustment groove. The other end of the one-way adjustment block is connected to the bottom surface of the one-way adjustment groove through an adjustment spring.

[0014] By adopting the above technical solution, the one-way adjustment device is used to ensure that the sliding pin can always slide in a cycle along only one path, so as to ensure that when the lifting rail follows the cover plate and moves with the lifting rail, the guide rod bears in the V-shaped grooves at different heights on the side wall of the guide cylinder through the connecting rod, so as to ensure that the guide rod and the guide cylinder can form stable supports at different heights. When the sliding pin axially moves along the V-shaped groove or the connecting groove with the intermediate sleeve and passes through the one-way adjustment plate in the one-way adjustment device, one side of the one-way adjustment plate is squeezed by the sliding pin, and the one-way adjustment plate is pressed into the one-way adjustment groove until the sliding pin separates from the one-way adjustment plate. Then the one-way adjustment plate pops out of the one-way adjustment groove under the elastic force of the adjustment spring. When the sliding pin slides back along the original path, the other side of the one-way adjustment plate is squeezed by the sliding pin. Under the blocking action of the wedge block, the one-way adjustment plate cannot rotate, so that the sliding pin cannot slide in the reverse direction. Therefore, it can be ensured that the sliding pin can only slide unidirectionally along the closed groove formed by connecting two V-shaped grooves through the connecting groove.

[0015] A further setting of the present invention is that the vehicle body support following cover plate is connected to the cover plate support beam in the cover plate support unit through a vehicle body automatic following mechanism, and the vehicle body automatic following mechanism has the same structure as the bogie automatic following mechanism.

[0016] By adopting the above technical solution, after the vehicle body support unit is lifted, the vehicle body support following cover plate under the fixed cover plate rises by a certain height under the drive of the vehicle body automatic following mechanism, so as to fill the vacant area on the fixed cover plate after the vehicle body support unit is lifted. When the vehicle body support unit rises, the vehicle body support following cover plate moves upward under the elastic force of the air spring in the vehicle body automatic following mechanism until it fills the vacant area after the lifting rail rises, ensuring that the upper surface of the vehicle body support following cover plate is exactly flush with the upper surface of the fixed cover plate.

[0017] A further setting of the present invention is that a return spring is provided at the lower end of the guide rod. The return spring is located inside the guide cylinder. One end of the return spring is fixedly connected to the guide rod, and the lower end of the return spring is fixedly connected to the guide cylinder fixing plate.

[0018] By adopting the above technical solution, the return spring can be used as a temporary spare spring for the air spring, so that when the air spring breaks or fails, the lifting rail following cover plate and the vehicle body support following cover plate can still work normally, effectively avoiding the situation of safety accidents caused by the sudden breakage or failure of the air spring. That is, when the air spring breaks or fails, when the lifting rail or the vehicle body support following cover plate rises, the return spring replaces the air spring to push the lifting rail following cover plate or the vehicle body support following cover plate upward to fill the vacant area on the fixed cover plate. When the lifting rail or the vehicle body support unit descends, the lifting rail following cover plate or the vehicle body support following cover plate moves downward and compresses the return spring to accumulate spring force, which is used to drive the lifting rail following cover plate or the vehicle body support following cover plate to rise again when the lifting rail or the vehicle body support unit rises to continue filling the gap.

[0019] A further setting of the present invention is that the bogie lifting unit further includes a lifting unit and a lifting rail driving unit. The lifting unit includes two groups of bogie lifting columns respectively located on both sides of the track. The upper ends of each group of bogie lifting columns are fixedly connected to both ends of the lifting rail. The lower ends of the bogie lifting columns are connected to the lifting rail driving unit. The lifting rail driving unit includes a lead screw nut mechanism, a guide box, and a bogie lifting driving motor. The bogie lifting column is connected to the lead screw nut mechanism through the guide box. A guide wheel is installed on the guide box. The bogie lifting column is located between the guide box and the guide wheel. The lead screws in the lead screw nut mechanisms connected to each bogie lifting column are all connected to the bogie lifting driving motor.

[0020] By adopting the above technical solution, the bogie lifting drive motor drives the screw rod in the lifting rail drive unit of the bogie lifting unit to rotate, so that the bogie lifting column moves up and down along the screw rod in the screw nut with the guide box, thereby realizing the lifting operation of the bogie lifting unit. The guide box body is the guiding part of the bogie lifting column. The guide wheels installed thereon can ensure that the bogie lifting column can lift vertically, and can also bear the bending moment generated by the load on the bogie lifting column, making the bearing capacity of the bogie lifting column stronger.

[0021] The further setting of the present invention is that: the vehicle body support unit includes a vehicle body lifting column, a support head for directly contacting the jacking point on the vehicle body, and a lifting column drive unit. The support head is installed at the top of the vehicle body lifting column. The lifting column drive unit includes a screw nut mechanism and a guide box. The vehicle body lifting column is connected to the screw nut mechanism through the guide box. Guide wheels are installed on the guide box. The vehicle body lifting column is located between the guide box and the guide wheels. The screw rods in the screw nut mechanisms connected to each vehicle body lifting column are all connected to the vehicle body lifting drive motor.

[0022] By adopting the above technical solution, the vehicle body lifting drive motor drives the screw rod in the lifting column drive unit to rotate, so that the vehicle body lifting column moves up and down along the screw rod in the screw nut with the guide box, thereby realizing the lifting operation of the vehicle body lifting unit. The guide box body is the guiding part of the vehicle body lifting column. The guide wheels installed thereon can ensure that the vehicle body lifting column can lift vertically, and can also bear the bending moment generated by the load on the vehicle body lifting column, making the bearing capacity of the vehicle body lifting column stronger.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention lifts the bogie and the car body through the bogie lifting unit and the car body support unit, facilitating the disassembly, replacement of the bogie of the vehicle, and the maintenance and replacement operations of the electrical facilities under the car body. The cover plate support unit in the steel structure bearing platform is used for fixing the support of the cover plate and the connection between the bogie lifting unit and the car body support unit and the civil engineering foundation pit, so that the whole equipment is placed below the ground plane. Among them, the fixed cover plate in the steel structure bearing platform is used to completely cover the equipment in the foundation pit. At the same time, the upper surface of the fixed cover plate is flush with the ground and has no obstacles, effectively ensuring the safety needs for the maintenance operation vehicle and personnel to pass. During the car body lifting operation, the bogie lifting unit and the car body support unit rise out of the ground. After the operation is completed, the bogie lifting unit and the car body support unit descend below the ground. When the bogie lifting unit and the car body support unit rise out of the ground, the bogie automatic following mechanism and the car body automatic following mechanism respectively drive the lifting rails under the fixed cover plate to follow the cover plate and the car body support to follow the cover plate to rise synchronously in sequence and respectively fill the vacant areas after the lifting rails in the bogie lifting unit rise and the vacant areas after the car body support unit rises, ensuring that the lifting rails follow the cover plate and the car body support follow the cover plate to be flush with the upper surface of the fixed cover plate and additionally providing sufficient supporting force, providing a good operation platform and supporting force for the maintenance operation personnel, which can not only provide safety protection for the operators, avoid the gaps in the fixed cover plate from causing harm to the personnel, but also prevent people, workpieces, tools, etc. from falling into the gaps and foundation pits. It is not only convenient for operation but also has good safety performance.

[0025] 2. The guiding and bearing mechanism in the bogie automatic following mechanism and the car body automatic following mechanism of the present invention is used, on the one hand, to guide the up and down movement of the air spring, so that the lifting rail follows the cover plate and the car body support follows the cover plate with better stability during the up and down movement, and effectively ensures that the lifting rail follows the cover plate and the car body support follows the cover plate can always have good alignment with the vacant area after the lifting rail and the car body support unit on the fixed cover plate are raised, avoiding the interference between the lifting rail following the cover plate and the car body support following the cover plate and other structures, and effectively improving the reliability of the equipment; on the other hand, it is also used to support the lifting rail following the cover plate and the car body support following the cover plate. When the lifting rail follows the cover plate or the car body support follows the cover plate and rises, the air spring is compressed to the shortest. At this time, the sliding pin connected to the lowermost end of the connecting rod on the guide rod is located at the lowermost end of the V-shaped groove on the side wall of the guide cylinder. The guide rod is supported in this V-shaped groove through the connecting rod, so that the guide rod and the guide cylinder are axially relatively fixed to form a stable support; when the lifting rail or the car body support unit rises, the air spring jacks up the lifting rail following the cover plate or the car body support following the cover plate to fill the vacant area on the fixed cover plate. At this time, the sliding pin connected to the lowermost end of the connecting rod on the guide rod is located at the lowermost end of the uppermost V-shaped groove on the side wall of the guide cylinder. The guide rod is supported in this V-shaped groove through the connecting rod, so that the guide rod and the guide cylinder are axially relatively fixed to form a stable support, ensuring that the bearing capacity when the lifting rail follows the cover plate or the car body support follows the cover plate supports the maintenance personnel is dispersed on the guide rod and the guide cylinder. This not only greatly reduces the load on the air spring, effectively reduces the probability of air spring damage, thereby effectively reducing the failure rate and maintenance cost of the equipment, but also can effectively avoid the safety accident problem caused by the sudden breakage or failure of the air spring and the fall of the lifting rail following the cover plate, further improving the reliability of the equipment.

[0026] 3. The return spring arranged at the lower end of the guide rod in the guiding and bearing mechanism of the bogie automatic following mechanism and the car body automatic following mechanism of the present invention can be used as a temporary spare spring for the air spring, so that when the air spring breaks or fails, the lifting rail follows the cover plate and the car body support follows the cover plate can still work normally, effectively avoiding the situation of safety accidents caused by the sudden breakage or failure of the air spring, that is: when the air spring breaks or fails, when the lifting rail or the car body support follows the cover plate and rises, the return spring replaces the air spring to jack up the lifting rail following the cover plate or the car body support following the cover plate upward to fill the vacant area on the fixed cover plate. When the lifting rail or the car body support unit descends, the lifting rail follows the cover plate or the car body support follows the cover plate and moves downward to compress the return spring to accumulate spring force, which is used to drive the lifting rail following the cover plate or the car body support following the cover plate to rise again to continue filling the gap when the lifting rail or the car body support unit rises again. Brief Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0028] Figure 1 is the overall structural schematic diagram of a fixed car lifter of the present invention.

[0029] Figure 2 is the sectional structural schematic diagram when the bogie lifting unit in a fixed car lifter of the present invention is lifted.

[0030] Figure 3 is the sectional structural schematic diagram when the car body support unit in a fixed car lifter of the present invention is lifted.

[0031] Figure 4 is the schematic diagram of the relative position between a fixed car lifter of the present invention and the car body support unit in a fixed car lifter of the present invention.

[0032] Figure 5 is the connection structural schematic diagram of the lifting rail following cover plate and the bogie automatic following mechanism in a fixed car lifter of the present invention.

[0033] Figure 6 is the connection structural schematic diagram of the car body support following cover plate and the car body automatic following mechanism in a fixed car lifter of the present invention.

[0034] Figure 7 is the structural schematic diagram of the guiding and bearing mechanism in a fixed car lifter of the present invention.

[0035] Figure 8 is Figure 7 the partial enlarged schematic diagram of A in

[0036] Figure 9 is the sectional structural schematic diagram of the connection of the guiding cylinder, guiding rod and return spring in the guiding and bearing mechanism of a fixed car lifter of the present invention.

[0037] Figure 10 the structural schematic diagram of the one-way adjusting device in the guiding and bearing mechanism of a fixed car lifter of the present invention.

[0038] In the figure, 1 is the bogie lifting unit; 2 is the car body support unit; 3 is the steel structure bearing platform; 4 is the foundation pit; 5 is the fixed cover plate; 6 is the lifting rail; 7 is the lifting rail follower cover plate; 71 is the longitudinal beam; 72 is the cross beam; 8 is the car body support follower cover plate; 9 is the bogie automatic following mechanism; 10 is the car body automatic following mechanism; 11 is the air spring; 12 is the air spring bracket; 13 is the guiding and bearing mechanism; 131 is the guiding cylinder; 132 is the guiding rod; 133 is the guiding cylinder fixing plate; 134 is the V-shaped groove; 135 is the connecting groove; 137 is the connecting rod; 136 is the sliding pin; 138 is the return spring; 14 is the lifting unit; 141 is the bogie lifting column; 15 is the lifting rail driving unit; 16 is the lead screw nut mechanism; 17 is the guiding box; 18 is the bogie lifting driving motor; 19 is the car body lifting column; 20 is the support head; 21 is the lifting column driving unit; 22 is the car body lifting driving motor; 23 is the one-way adjusting device; 231 is the one-way adjusting groove; 232 is the one-way adjusting block; 233 is the wedge block; 234 is the adjusting spring. Detailed implementation manners

[0039] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] As Figures 1 - 10 shown, a fixed car body lifter includes a bogie lifting unit 1, a car body support unit 2 and a steel structure bearing platform 3. The bogie lifting unit 1 and the car body support unit 2 are both installed below the steel structure bearing platform 3 on both sides of the track. The steel structure bearing platform 3 includes a cover plate unit and a cover plate support unit. The cover plate unit is fixed in the foundation pit 4 through the cover plate support unit. The cover plate unit includes a fixed cover plate 5. Below the fixed cover plate 5, there are a lifting rail follower cover plate 7 for filling the vacant area after the lifting rail 6 in the bogie lifting unit 1 rises and a car body support follower cover plate 8 for filling the vacant area after the car body support unit 2 rises. The lifting rail follower cover plate 7 is connected to the cover plate support unit through a bogie automatic following mechanism 9, and the car body support follower cover plate 8 is connected to the cover plate support unit through a car body automatic following mechanism 10.

[0041] Further, the lifting rail following cover plate 7 includes a longitudinal beam 71 parallel to the rail and two cross beams 72 perpendicular to the longitudinal beam 71 symmetrically fixed at both ends of the longitudinal beam 71. Bogie automatic following mechanisms 9 are provided at both the ends where the two cross beams 72 are connected to the longitudinal beam 71 and at the other ends of the two cross beams 72. The bogie automatic following mechanism 9 includes a gas spring 11. The upper end of the gas spring 11 is connected to the cross beam 72 or the longitudinal beam 71 in the lifting rail following cover plate 7, and the lower end of the gas spring 11 is respectively connected to the cover plate support beam in the cover plate support unit through a gas spring support 12.

[0042] Further, guiding and bearing mechanisms 13 are respectively provided on both sides of the gas spring 11. The guiding and bearing mechanism 13 includes a guiding cylinder 131 and a guiding rod 132. The guiding cylinder 131 is fixedly connected to the cover plate support beam in the cover plate support unit through a guiding cylinder fixing plate 133. The guiding rod 132 is fixedly connected to the cross beam 72 or the longitudinal beam 71 in the lifting rail following cover plate 7. The guiding rod 132 is in longitudinal sliding fit with the guiding cylinder 131. Two upward-opening V-shaped grooves 134 are distributed up and down on the side wall of the guiding cylinder 131. The two ends of the two V-shaped grooves 134 are connected through a connecting groove 135 to form a closed groove. A plurality of one-way adjusting devices 23 for controlling the sliding pin 136 to slide only unidirectionally along the closed groove formed by the connection of the two V-shaped grooves through the connecting groove are respectively provided on the side walls of the two V-shaped grooves 134 and the connecting groove 135 with both ends connected. A connecting rod 137 is provided on the guiding rod 132. A sliding pin 136 is provided in the closed groove of the guiding cylinder 131. The upper end of the connecting rod 137 is rotatably connected to the guiding rod 132, and the lower end of the connecting rod 137 is rotatably connected to the sliding pin 136.

[0043] Further, the one-way adjusting device 23 includes a one-way adjusting groove 231 provided on the side wall of the V-shaped groove 134 or the connecting groove 135. A one-way adjusting block 232 is provided in the one-way adjusting groove 231. One end of the one-way adjusting block 232 is hinged to a wedge block 233, and the wedge block 233 is fixed on one side of the one-way adjusting groove 231. The other end of the one-way adjusting block 232 is connected to the bottom surface of the one-way adjusting groove 231 through an adjusting spring 234.

[0044] Further, the vehicle body support following cover plate 8 is connected to the cover plate support beam in the cover plate support unit through a vehicle body automatic following mechanism 10, and the structure of the vehicle body automatic following mechanism 10 is the same as that of the bogie automatic following mechanism 9.

[0045] Further, a return spring 138 is provided at the lower end of the guiding rod 132. The return spring 138 is located inside the guiding cylinder 131. One end of the return spring 138 is fixedly connected to the guiding rod 132, and the lower end of the return spring 138 is fixedly connected to the guiding cylinder fixing plate 133.

[0046] Furthermore, the bogie lifting unit 1 further includes a lifting unit 14 and a lifting rail driving unit 15. The lifting unit 14 includes two groups of bogie lifting columns 141 respectively located on both sides of the track. The upper ends of each group of bogie lifting columns 141 are fixedly connected to both ends of the lifting rail 6. The lower ends of the bogie lifting columns 141 are connected to the lifting rail driving unit 15. The lifting rail driving unit 15 includes a lead screw nut mechanism 16, a guide box 17 and a bogie lifting driving motor 18. The bogie lifting column is connected to the lead screw nut mechanism 16 through the guide box 17. Guide wheels are installed on the guide box 17. The bogie lifting column 141 is located between the guide box 17 and the guide wheels. The lead screws in the lead screw nut mechanisms 16 connected to each bogie lifting column are all connected to the bogie lifting driving motor 18.

[0047] Furthermore, the car body support unit 2 includes a car body lifting column 19, a support head 20 for directly contacting the car body jacking point, and a lifting column driving unit 21. The support head 20 is installed at the top of the car body lifting column 19. The lifting column driving unit 21 includes a lead screw nut mechanism 16, a guide box 17 and a car body lifting driving motor 22. The car body lifting column 19 is connected to the lead screw nut mechanism 16 through the guide box 17. Guide wheels are installed on the guide box 17. The car body lifting column 19 is located between the guide box 17 and the guide wheels. The lead screws in the lead screw nut mechanisms 16 connected to each car body lifting column 19 are all connected to the car body lifting driving motor 22.

[0048] Working principle of the present invention: The bogie lifting unit 1 and the car body supporting unit 2 are used to lift the bogie and the car body, facilitating the disassembly, replacement of the bogie of the vehicle and the maintenance and replacement operations of the electrical facilities under the car body. The cover plate supporting unit in the steel structure bearing platform 3 is used to fix the support of the cover plate 5 and the connection between the bogie lifting unit 1 and the car body supporting unit 2 and the civil engineering foundation pit 4, so that the whole equipment is placed below the ground plane. Among them, the fixed cover plate 5 in the steel structure bearing platform 3 is used to completely cover the equipment in the foundation pit 4. At the same time, the upper surface of the fixed cover plate 5 is flush with the ground and there is no obstacle, effectively ensuring the safety needs for the maintenance operation vehicle and personnel to pass. During the car lifting operation, the bogie lifting unit 1 and the car body supporting unit 2 rise out of the ground. After the operation is completed, the bogie lifting unit 1 and the car body supporting unit 2 descend below the ground. When the bogie lifting unit 1 and the car body supporting unit 2 rise out of the ground, the bogie automatic following mechanism 9 and the car body automatic following mechanism 10 respectively drive the lifting rail following cover plate 7 below the fixed cover plate 5 and the car body supporting following cover plate 8 to rise synchronously in sequence and fill the vacant areas after the lifting rail 6 in the bogie lifting unit 1 and the car body supporting unit 2 rise respectively, ensuring that the lifting rail following cover plate 7 and the car body supporting following cover plate 8 are flush with the upper surface of the fixed cover plate 5, and additionally providing sufficient supporting force, providing a good operation platform and supporting force for the maintenance operation personnel, which can not only provide safety protection for the operators, avoid the gaps of the fixed cover plate 5 from causing harm to the personnel, but also prevent people, workpieces, tools, etc. from falling into the gaps and foundation pits. It is not only convenient for operation but also has good safety performance.

[0049] That is, when the lifting rail 6 or the car body supporting unit 2 rises, the lifting rail following cover plate 7 or the car body supporting following cover plate 8 below the fixed cover plate 5 rises by a certain height under the drive of the bogie automatic following mechanism 9 or the car body automatic following mechanism 10, so as to fill the vacant area on the fixed cover plate 5 after the lifting rail 6 or the car body supporting unit 2 rises. When the lifting rail 6 or the car body supporting unit 2 rises, the lifting rail following cover plate 7 or the car body supporting following cover plate 8 moves upward under the elastic force of the air spring 11 in the bogie automatic following mechanism 9 or the car body automatic following mechanism 10 until the lifting rail 6 or the car body supporting unit 2 reaches the set height. At this time, the lifting rail following cover plate 7 or the car body supporting following cover plate 8 just fills the vacant area after the lifting rail 6 or the car body supporting unit 2 rises, ensuring that the upper surface of the lifting rail following cover plate 7 or the car body supporting following cover plate 8 is exactly flush with the upper surface of the fixed cover plate 5.

[0050] In addition, the guiding and bearing mechanism 13 in the bogie automatic following mechanism 9 and the car body automatic following mechanism 10 is used, on the one hand, to guide the up and down movement of the air spring 11, so that the lifting rail follows the cover plate 7 and the car body support follows the cover plate 8 with better stability during the up and down movement, and effectively ensures that the lifting rail follows the cover plate 7 and the car body support follows the cover plate 8 can always have good alignment with the vacant area after the lifting rail 6 and the car body support unit 2 on the fixed cover plate 5 are lifted, avoiding the interference between the lifting rail following cover plate 7 and the car body support following cover plate 8 and other structures, and effectively improving the reliability of the equipment. On the other hand, it is also used to support the lifting rail following cover plate 7 and the car body support following cover plate 8. When the lifting rail following cover plate 7 or the car body support following cover plate 8 is lifted, the air spring 11 is compressed to the shortest. At this time, the sliding pin 136 connected to the lowermost end of the connecting rod 137 on the guide rod 132 is located at the lowermost end of the V-shaped groove 134 at the lowermost part of the side wall of the guide cylinder 131. The guide rod 132 is supported in the V-shaped groove 134 through the connecting rod 137, so that the guide rod 132 and the guide cylinder 131 are axially relatively fixed to form a stable support. After the lifting rail 6 or the car body support unit 2 is lifted, the air spring 11 jacks up the lifting rail following cover plate 7 or the car body support following cover plate 8 to fill the vacant area on the fixed cover plate 5. At this time, the sliding pin 136 connected to the lowermost end of the connecting rod 137 on the guide rod 132 is located at the lowermost end of the V-shaped groove 134 at the uppermost part of the side wall of the guide cylinder 131. The guide rod 132 is supported in the V-shaped groove 134 through the connecting rod 137, so that the guide rod 132 and the guide cylinder 131 are axially relatively fixed to form a stable support, ensuring that the bearing capacity when the lifting rail following cover plate 7 or the car body support following cover plate 8 supports the maintenance personnel is dispersed on the guide rod 132 and the guide cylinder 131. This not only greatly reduces the load on the air spring 11, effectively reduces the probability of damage to the air spring 11, thereby effectively reducing the failure rate and maintenance cost of the equipment, but also can effectively avoid the problem of safety accidents caused by the sudden fracture or failure of the air spring 11 resulting in the fall of the lifting rail following cover plate 7, further improving the reliability of the equipment.The return spring 138 provided at the lower end of the guide rod 132 in the guide and bearing mechanism 13 of the bogie automatic following mechanism 9 and the car body automatic following mechanism 10 can be used as a temporary backup spring for the air spring 11. When the air spring 11 breaks or fails, the lifting rail following cover plate 7 and the car body support following cover plate 8 can still work normally, effectively avoiding the situation of safety accidents caused by the sudden breakage or failure of the air spring 11. That is, when the air spring 11 breaks or fails, when the lifting rail or the car body support following cover plate 8 rises, the return spring 138 replaces the air spring 11 to push the lifting rail following cover plate 7 or the car body support following cover plate 8 upward to fill the vacant area on the fixed cover plate 5. When the lifting rail or the car body support unit descends, the lifting rail following cover plate 7 or the car body support following cover plate 8 moves downward and compresses the return spring 138 to accumulate spring force, which is used to drive the lifting rail following cover plate 7 or the car body support following cover plate 8 to rise again when the lifting rail 6 or the car body support unit 2 rises again to continue filling the gap.

Claims

1. A fixed car lifting machine, comprising a bogie lifting unit (1), a car body support unit (2) and a steel structure bearing platform (3). The bogie lifting unit (1) and the car body support unit (2) are both installed below the steel structure bearing platform (3) on both sides of the track. The steel structure bearing platform (3) includes a cover plate unit and a cover plate support unit. The cover plate unit is fixed in the foundation pit (4) through the cover plate support unit, and is characterized in that: The cover plate unit includes a fixed cover plate (5). Below the fixed cover plate (5), there is a lifting rail following cover plate (7) for filling the vacant area after the lifting rail (6) in the bogie lifting unit (1) is lifted, and a car body support following cover plate (8) for filling the vacant area after the car body support unit (2) is lifted. The lifting rail following cover plate (7) is connected to the cover plate support unit through a bogie automatic following mechanism (9), and the car body support following cover plate (8) is connected to the cover plate support unit through a car body automatic following mechanism (10). The lifting rail following cover plate (7) includes a longitudinal beam (71) parallel to the track and two cross beams (72) perpendicular to the longitudinal beam (71) symmetrically fixed at both ends of the longitudinal beam (71). At one end where the two cross beams (72) are connected to the longitudinal beam (71) and at the other ends of the two cross beams (72), there are bogie automatic following mechanisms (9). The bogie automatic following mechanism (9) includes a gas spring (11). The upper end of the gas spring (11) is connected to the cross beam (72) or the longitudinal beam (71) in the lifting rail following cover plate (7), and the lower end of the gas spring (11) is respectively connected to the cover plate support beam in the cover plate support unit through a gas spring bracket (12). On both sides of the gas spring (11), there are guiding and bearing mechanisms (13). The guiding and bearing mechanism (13) includes a guiding cylinder (131) and a guiding rod (132). The guiding cylinder (131) is fixedly connected to the cover plate support beam in the cover plate support unit through a guiding cylinder fixing plate (133). The guiding rod (132) is fixedly connected to the cross beam (72) or the longitudinal beam (71) in the lifting rail following cover plate (7). The guiding rod (132) is longitudinally slidably matched with the guiding cylinder (131). On the side wall of the guiding cylinder (131), there are two upward-opening V-shaped grooves (134) distributed up and down. The two ends of the two V-shaped grooves (134) are connected through a connecting groove (135) to form a closed groove. On the side walls of the two V-shaped grooves (134) and the connecting groove (135) with both ends connected, there are multiple one-way adjusting devices (23) for controlling the sliding pin (136) to slide unidirectionally only along the closed groove formed by the two V-shaped grooves connected through the connecting groove. There is a connecting rod (137) on the guiding rod (132). There is a sliding pin (136) in the closed groove of the guiding cylinder (131). The upper end of the connecting rod (137) is rotatably connected to the guiding rod (132), and the lower end of the connecting rod (137) is rotatably connected to the sliding pin (136).

2. The fixed car lifter according to claim 1, wherein: The one-way adjusting device (23) includes a one-way adjusting groove (231) provided on the side wall of the V-shaped groove (134) or the connecting groove (135). Inside the one-way adjusting groove (231), there is a one-way adjusting block (232). One end of the one-way adjusting block (232) is hinged to a wedge block (233), and the wedge block (233) is fixed on one side of the one-way adjusting groove (231). The other end of the one-way adjusting block (232) is connected to the bottom surface of the one-way adjusting groove (231) through an adjusting spring (234).

3. The fixed car lifter according to claim 2, characterized in that: The vehicle body support following cover plate (8) is connected to the cover plate support beam in the cover plate support unit through the vehicle body automatic following mechanism (10), and the vehicle body automatic following mechanism (10) has the same structure as the bogie automatic following mechanism (9).

4. A fixed car lift according to claim 3, characterized in that: A return spring (138) is provided at the lower end of the guide rod (132). The return spring (138) is located inside the guide cylinder (131). One end of the return spring (138) is fixedly connected to the guide rod (132), and the lower end of the return spring (138) is fixedly connected to the guide cylinder fixing plate (133).

5. A fixed car lifter according to claim 1, characterized in that: The bogie lifting unit (1) further includes a lifting unit (14) and a lifting rail driving unit (15). The lifting unit (14) includes two groups of bogie lifting columns (141) respectively located on both sides of the track. The upper ends of each group of bogie lifting columns (141) are fixedly connected to both ends of the lifting rail (6). The lower end of the bogie lifting column (141) is connected to the lifting rail driving unit (15). The lifting rail driving unit (15) includes a lead screw nut mechanism (16), a guide box (17), and a bogie lifting driving motor (18). The bogie lifting column (141) is connected to the lead screw nut mechanism (16) through the guide box (17). Guide wheels are installed on the guide box (17). The bogie lifting column (141) is located between the guide box (17) and the guide wheels. The lead screws in the lead screw nut mechanisms (16) connected to each bogie lifting column (141) are all connected to the bogie lifting driving motor (18).

6. A fixed car lifter according to claim 1, characterized in that: The vehicle body support unit (2) includes vehicle body lifting columns (19), a support head (20) for directly contacting the jacking points on the vehicle body, and a lifting column driving unit (21). The support head (20) is installed at the top of the vehicle body lifting column (19). The lifting column driving unit (21) includes a lead screw nut mechanism (16), a guide box (17), and a vehicle body lifting driving motor (22). The vehicle body lifting column (19) is connected to the lead screw nut mechanism (16) through the guide box (17). Guide wheels are installed on the guide box (17). The vehicle body lifting column (19) is located between the guide box (17) and the guide wheels. The lead screws in the lead screw nut mechanisms (16) connected to each vehicle body lifting column (19) are all connected to the vehicle body lifting driving motor (22).

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