Heavy load rail shuttle

Abstract

The utility model relates to the field of shuttle vehicle, concretely relates to a heavy load rail shuttle vehicle, including bottom plate, walking mechanism and elevating system, elevating system includes lift plate, a plurality of elevating units and is used for driving each elevating unit action's power unit, and elevating unit includes worm, the worm wheel that rotates set up on the bottom plate and is cooperated with worm and the screw rod that is coaxial with worm wheel and is connected with worm thread, and the upper end of screw rod is fixedly connected with lift plate. Adopt this technical scheme, be favorable to reducing the deformation probability of elevating system, realize the up and down stable motion of lift plate.

Description

Technical Field

[0001] This utility model relates to the field of shuttle vehicles, specifically to a heavy-duty rail shuttle vehicle. Background Technology

[0002] Currently, there are various assembly and testing lines for different special vehicles on the market. In particular, heavy vehicles such as special armored vehicles and tanks used in military industry need to be lifted and lowered to different heights by lifting plates during the assembly and maintenance process to facilitate testing and assembly at different locations. Because the vehicles are too heavy, the commonly used method on the market is to use hydraulic cylinders to lift and lower them.

[0003] The drawback of this technology is that the hydraulic cylinders rise and fall due to the power conversion and loss during the process, resulting in differences in the lifting speed and time of different cylinders. In addition, the load-bearing position varies for different vehicles, and long-term use can cause the lifting mechanism to deform to varying degrees. Utility Model Content

[0004] The present invention aims to provide a heavy-duty rail shuttle vehicle to achieve smooth up-and-down movement of the lifting platform.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heavy-duty rail shuttle, comprising a base plate, a walking mechanism and a lifting mechanism, wherein the lifting mechanism comprises a lifting plate, a plurality of lifting units and a power unit for driving the operation of each lifting unit, wherein the lifting unit comprises a worm gear, a worm wheel rotatably mounted on the base plate and cooperating with the worm gear, and a screw coaxial with and threadedly connected to the worm wheel, wherein the upper end of the screw is fixedly connected to the lifting plate.

[0006] The beneficial effects of this solution are as follows: through the cooperation of worm gear and screw, and by utilizing the screw structure composed of worm gear and screw, the up and down movement of the lifting plate is made stable and reliable. The up and down movement of the lifting plate meets the requirements of synchronization and stability, which helps to reduce the probability of deformation of the power unit. In addition, the mechanical self-locking characteristics of this solution make the shuttle safer during use.

[0007] Furthermore, there are four lifting units distributed at the four corners of the base plate and the lifting plate. The power unit includes a dual-head servo motor and two transmission parts. The dual-head servo motor is fixedly mounted on the base plate. Each transmission part includes a reduction assembly, several couplings, and a transmission shaft fixedly connected to the dual-head servo motor through the couplings. The reduction assembly includes a reduction gearbox, a rotating shaft rotatably disposed in the reduction gearbox, and a driving gear and two driven gears fixedly connected to the rotating shaft. The driving gear and the two driven gears mesh. The rotating shaft fixedly connected to the driving gear is fixedly connected to the transmission shaft through the couplings. The rotating shaft fixedly connected to the driven gears is fixedly connected to the worm gear through the couplings.

[0008] Furthermore, the lifting unit also includes a volute, which includes a longitudinal volute and a transverse volute that are fixedly connected and communicate with each other. The longitudinal volute is fixedly connected to the base plate, the worm wheel is rotatably disposed in the longitudinal volute, and the worm is rotatably disposed in the transverse volute.

[0009] Furthermore, it also includes a controller, and each lifting unit is equipped with a pull-wire displacement sensor. The pull-wire displacement sensor, controller and dual-head servo motor are electrically connected. The pull-wire displacement sensor includes a sensor body fixedly connected to the base plate and a pull rope connecting the sensor body and the lifting plate.

[0010] The beneficial effect of this solution is that if one of the four corner positions of the lifting plate is not in synchronous lifting, the machine can be stopped in time to avoid damaging the screw.

[0011] Furthermore, a striker is fixedly connected to the lower surface of the lifting plate, and a strike block is fixedly connected to the upper and lower ends of the striker. A limit switch of different heights is fixedly connected to the bottom plate on both sides of the striker. The lower strike block can contact the lower limit switch, and the upper strike block can contact the higher limit switch. The limit switches are also electrically connected to the controller and the dual-head servo motor.

[0012] Furthermore, the walking mechanism includes roller sets located at both ends of the base plate and rotatably connected to the base plate, and a drive unit for driving the roller sets at one end of the base plate to rotate. The drive unit includes a drive component and a reducer. A drive gear is coaxially fixedly connected to the roller set, and the drive component drives the drive gear to rotate through the reducer.

[0013] Furthermore, each end of the base plate is provided with at least two sets of rollers, and a transition gear is rotatably connected to the base plate, with the drive gear between adjacent roller sets meshing with the transition gear.

[0014] The beneficial effects of this solution are: the rollers and the ground-laid track are in rigid contact; if part of the track is not horizontal, setting at least two sets of rollers at each end helps to ensure that at least one set of rollers is in contact with the track.

[0015] Furthermore, a power collection frame is provided on the lower surface of the base plate. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a three-dimensional view of the speed reduction component of this utility model. Figure 3 This is an exploded view of the end of this utility model; Figure 4 This is a three-dimensional view of the present invention from a downward perspective.

[0017] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: base plate 1, lifting plate 2, screw 3, longitudinal volute 4, transverse volute 5, dual-head servo motor 6, transmission shaft 7, driving gear 8, driven gear 9, roller 10, drive gear 11, transition gear 12, power take-up frame 13, pull wire displacement sensor 14, connecting seat 15, impact rod 16, impact block 17, limit switch 18. Detailed Implementation

[0018] Example 1 Example 1 is basically as shown in the appendix. Figure 1-4 As shown, Figure 1 The heavy-duty rail shuttle shown includes a base plate 1, a traveling mechanism, and a lifting mechanism. The lifting mechanism includes a lifting plate 2, four lifting units, and a power unit for driving the operation of each lifting unit. The four lifting units are respectively distributed at the four corners of the base plate 1 and the lifting plate 2, as shown below. Figure 2 , 3 As shown, each lifting unit includes a volute, a worm, a worm wheel that cooperates with the worm, and a T-shaped screw 3 that is coaxial with and threaded to the worm wheel. The volute includes a longitudinal volute 4 and a transverse volute 5 that are integrally formed or welded together and connected. The longitudinal volute 4 is fixedly connected to the base plate 1 by bolts. The worm wheel is rotatably disposed in the longitudinal volute 4, and the worm is rotatably disposed in the transverse volute 5. The worm wheel has a threaded hole along its axial direction. The screw 3 passes through the worm wheel, and the upper end of the screw 3 is fixedly connected to the lifting plate 2 by bolts.

[0019] The power unit can be selected from four motors to drive the worm gear rotation respectively. In this embodiment, the power unit includes a dual-head servo motor 6 and two transmission parts. The dual-head servo motor 6 is fixedly installed on the base plate 1. Each transmission part includes a reduction assembly, several couplings, and a transmission shaft 7 fixedly connected to the dual-head servo motor 6 through the couplings. The reduction assembly includes a reduction gearbox, a rotating shaft rotatably disposed in the reduction gearbox, and a driving gear 8 and two driven gears 9 fixedly connected to the rotating shaft through splines. The driving gear 8 is located between the two driven gears 9 and meshes with the two driven gears 9. The rotating shaft fixedly connected to the driving gear 8 is fixedly connected to the transmission shaft 7 through the couplings. The rotating shaft fixedly connected to the driven gears 9 is fixedly connected to the worm gear through the couplings. Figure 2 and Figure 1 The difference lies in the omission of the outer casing covering the drive shaft 7, as well as the bottom and side plates of the gearbox.

[0020] like Figure 4As shown, the walking mechanism includes roller sets located at both ends of the base plate 1 and rotatably connected to the base plate 1, and a drive unit for driving the roller sets at one end of the base plate 1 to rotate. Specifically, each end of the base plate 1 is provided with at least two sets of roller sets; in this embodiment, there are two sets. A lifting lug is bolted to the lower surface of the base plate 1, and a through hole is opened on the lifting lug. A bearing is installed in the through hole with an interference fit. A support shaft is fixedly installed on the inner ring of the bearing. Each roller set includes two rollers 10, which are splinedly fixedly connected to the support shaft. A drive gear 11 and a transition gear 12 are also splinedly fixedly connected to the support shaft. The drive gear 11 and the transition gear 12 mesh between adjacent roller sets. The drive unit includes a drive component and a reducer. The drive component is connected to the reducer, and the output gear of the reducer also meshes with the drive gear 11 through a transition gear 12. The drive component can be a servo motor. Additionally, a power take-up frame 13 is installed on the lower surface of the base plate 1.

[0021] Example 2 Example 2 further includes a controller in addition to Example 1, such as... Figure 3 As shown, each lifting unit is equipped with a pull wire displacement sensor 14. The pull wire displacement sensor 14, the controller, and the dual-head servo motor 6 are electrically connected. The pull wire displacement sensor 14 includes a sensor body fixedly connected to the base plate 1 and a pull rope connecting the sensor body and the lifting plate 2. A connecting seat 15 is bolted to the lower surface of the lifting plate 2, and the upper end of the pull rope is bolted to the connecting seat 15.

[0022] A strike rod 16 is threadedly fixed to the lower surface of the lifting plate 2. The strike rod 16 is located at one end of the drive unit. A strike block 17 is fixedly connected to the upper and lower ends of the strike rod 16 by bolts. A limit switch 18 of different heights is fixedly connected to the base plate 1 on both sides of the strike rod 16. The lower strike block 17 can contact the lower limit switch 18, and the upper strike block 17 can contact the higher limit switch 18. The limit switches 18 are also electrically connected to the controller and the dual-head servo motor 6 to detect the lifting plate 2's rising and falling position.

[0023] Example 3 Based on and different from Embodiments 1 and 2, the two rollers 10 in the roller assembly are connected by a support shaft, the impact rod 16 is located at the end away from the drive unit, and a prompting block is welded and fixed on the side wall of the support shaft below the impact rod 16. After the impact rod 16 descends excessively, the prompting block can contact the impact block 17 at the lower end of the impact rod 16.

[0024] When the shuttle car, whose lifting plate 2 has already descended to its position, experiences an unexpected descent due to slippage of the screw 3 and worm gear during operation, the lifting plate 2 causes the impact rod 16 to descend. After the warning block contacts the impact block 17 at the lower end of the impact rod 16, it can restrict the support shaft from continuing to rotate. This prevents the two rollers 10 on the support shaft from rotating and instead rubs against the track. The resulting sound helps to alert the work crew to stop the shuttle car in time, preventing vehicles and other items on the shuttle car from tipping over and causing danger and economic losses.

[0025] The lower end of the impact bar 16 has a shuttle-shaped impact block 17, which is similar to two symmetrically formed frustums. When the indicator block rotates with the support shaft in the forward or reverse direction and contacts the lower end of the impact bar 16, the indicator block contacts the side of the impact block 17. This helps to decompose the force applied by the indicator block to the impact bar 16 in the vertical direction, which helps to reduce the probability of damage to the impact bar 16 and avoid further deformation and damage to the lifting mechanism caused by lifting the lifting plate 2 through the impact bar 16 at this time.

[0026] That is: a heavy-duty rail shuttle, including a base plate 1, a traveling mechanism and a lifting mechanism. The lifting mechanism includes a lifting plate 2, several lifting units and a power unit for driving the movement of each lifting unit. The lifting unit includes a worm gear, a worm wheel rotatably mounted on the base plate 1 and cooperating with the worm gear, and a screw 3 coaxial with and threadedly connected to the worm wheel. The upper end of the screw 3 is fixedly connected to the lifting plate 2. The traveling mechanism includes roller sets located at both ends of the base plate 1 and rotatably connected to the base plate 1, and a drive unit for driving the roller sets at one end of the base plate 1 to rotate. The roller sets include two rollers 10, which are connected by a support shaft. A bumper 16 is fixedly connected to the lower surface of the lifting plate 2. The bumper 16 is located at the end away from the drive unit. A bumper block 17 is fixedly connected to the lower end of the bumper 16. A warning block is fixed on the side wall of the support shaft below the bumper 16. The warning block can contact the bumper block 17 at the lower end of the bumper 16. The bumper block 17 at the lower end of the bumper 16 is spindle-shaped.

[0027] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A heavy-duty rail shuttle, characterized in that: It includes a base plate, a traveling mechanism and a lifting mechanism. The lifting mechanism includes a lifting plate, several lifting units and a power unit for driving the movement of each lifting unit. The lifting unit includes a worm gear, a worm wheel that is rotatably mounted on the base plate and cooperates with the worm gear, and a screw that is coaxial with the worm wheel and threadedly connected to the worm wheel. The upper end of the screw is fixedly connected to the lifting plate.

2. The heavy-duty rail shuttle according to claim 1, characterized in that: There are four lifting units distributed at the four corners of the base plate and the lifting platform. The power unit includes a dual-head servo motor and two transmission units. The dual-head servo motor is fixedly mounted on the base plate. Each transmission unit includes a reduction assembly, several couplings, and a transmission shaft fixedly connected to the dual-head servo motor via the couplings. The reduction assembly includes a reduction gearbox, a rotating shaft rotatably disposed in the reduction gearbox, and a driving gear and two driven gears fixedly connected to the rotating shaft. The driving gear and the two driven gears mesh. The rotating shaft fixedly connected to the driving gear is fixedly connected to the transmission shaft via a coupling. The rotating shaft fixedly connected to the driven gear is fixedly connected to the worm gear via a coupling.

3. A heavy-duty rail shuttle according to claim 2, characterized in that: The lifting unit also includes a volute, which includes a longitudinal volute and a transverse volute that are fixedly connected and communicate with each other. The longitudinal volute is fixedly connected to the base plate, the worm wheel is rotatably disposed in the longitudinal volute, and the worm is rotatably disposed in the transverse volute.

4. A heavy-duty rail shuttle according to any one of claims 2 and 3, characterized in that: It also includes a controller, and each lifting unit is equipped with a pull-wire displacement sensor. The pull-wire displacement sensor, controller and dual-head servo motor are electrically connected. The pull-wire displacement sensor includes a sensor body fixedly connected to the base plate and a pull rope connecting the sensor body and the lifting plate.

5. A heavy-duty rail shuttle according to claim 4, characterized in that: A striker is fixedly connected to the lower surface of the lifting plate. A strike block is fixedly connected to the upper and lower ends of the striker. A limit switch of different heights is fixedly connected to the bottom plate on both sides of the striker. The lower strike block can contact the lower limit switch, and the upper strike block can contact the higher limit switch. The limit switches are also electrically connected to the controller and the dual-head servo motor.

6. A heavy-duty rail shuttle according to any one of claims 1, 3, or 5, characterized in that: The walking mechanism includes roller sets located at both ends of the base plate and rotatably connected to the base plate, and a drive unit for driving the roller sets at one end of the base plate to rotate. The drive unit includes a drive component and a reducer. A drive gear is coaxially fixedly connected to the roller set, and the drive component drives the drive gear to rotate through the reducer.

7. A heavy-duty rail shuttle according to claim 6, characterized in that: Each end of the base plate is provided with at least two sets of rollers, and a transition gear is rotatably connected to the base plate. The drive gear between adjacent roller sets meshes with the transition gear.

8. A heavy-duty rail shuttle according to claim 7, characterized in that: A power take-up bracket is provided on the lower surface of the base plate.

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