Lifting unit and lifting roller bed

Abstract

The lifting unit comprises a cylinder, a linear guide rail, a rack, a gear shaft assembly and a self-lubricating assembly, a lifting mode that a gear is matched with the rack is adopted, lifting space cannot be occupied in the lifting direction, low-position lifting movement and high-position lifting movement can be achieved, and the self-lubricating assembly is arranged, so that the lifting roller bed is convenient to lift. Lubricating oil can be provided at the meshing position of a rack and a gear and on a sliding block of a linear guide rail, it is guaranteed that wheel clamping is avoided during meshing operation of the rack and the gear, overheating caused by too large friction force can be prevented, meanwhile, sliding smoothness of the sliding block on the linear guide rail is guaranteed, and stable operation of the whole lifting unit is guaranteed. The lifting roller bed comprises the lifting unit, a roller bed table board unit, a roller unit, a roller driving unit, a lifting driving unit, a stopper unit and a positioning pin unit, the lifting roller bed can achieve lifting movement and horizontal conveying of the sleigh, and different production requirements can be met by adopting standardized and modularized design.

Description

Technical Field

[0001] The utility model relates to the technical field of roller bed conveying, in particular to a lifting unit and a lifting roller bed. Background Art

[0002] The roller bed conveyor line is a typical conveying equipment used in automobile welding production lines. It is a production line that uses multiple rollers to drive a sled carrying vehicle parts for transportation. The lifting roller bed is the core equipment in the roller bed conveyor line. It is used for welding stations with conveying and positioning requirements. The lifting roller bed drives the sled carrying vehicle parts to move downward so that the vehicle parts fall on the positioning system under the car body. After the fixture is in place, the welding robot welds the car body. After welding, the fixture opens, and the lifting roller bed moves upward, driving the sled carrying vehicle parts upward again. After reaching the transmission height, the sled is transported to the next station by rollers.

[0003] As the demand for electric vehicles increases year by year, the manufacturing process of traditional fuel vehicles has also been further subdivided, resulting in different demands. For automobile body-in-white welding production lines, different types of lifting roller beds are needed to meet different production processes. Currently, the demand for lifting structures is diverse. Some new structures can not only reduce costs, but also improve the accuracy and durability of lifting roller beds.

[0004] In order to ensure the long-term stable use of the lifting structure, regular lubrication and maintenance of the lifting structure is essential. Most of the lifting structures in the prior art do not have the function of automatic lubrication and maintenance and require manual maintenance. However, manual maintenance requires shutdown, which affects production efficiency. Utility Model Content

[0005] To this end, the technical problem to be solved by the utility model is to overcome the problem that the lifting structure in the prior art lacks regular lubrication and maintenance functions, and to provide a lifting unit and a lifting roller bed, which are equipped with a self-lubricating component that can lubricate and maintain the racks, gears and linear guides in the lifting unit to ensure the stability of the lifting unit during long-term use.

[0006] In order to solve the above technical problems, the utility model provides a lifting unit, comprising:

[0007] Column;

[0008] A linear guide rail is arranged on the column, and a slider is arranged on the linear guide rail to slide along the linear guide rail;

[0009] A rack, arranged on the column and parallel to the linear guide rail;

[0010] A carrier plate connected to the slider and slidably arranged on the linear guide rail;

[0011] A gear shaft assembly is arranged on the carrier plate, comprising a driving shaft and a gear connected by the driving shaft, wherein the driving shaft drives the gear to rotate under the drive of an external driving source, and the gear meshes with the rack to convert the rotational force into a sliding force of the carrier plate on the linear guide rail;

[0012] The self-lubricating component includes a lubricating oil pot, a gear lubricating oil pipe, an oil nozzle and a guide rail lubricating oil pipe. The lubricating oil pot is connected to the gear lubricating oil pipe, the gear lubricating oil pipe provides lubricating oil at the meshing position of the rack and the gear, the oil nozzle is connected to the guide rail lubricating oil pipe, the guide rail lubricating oil pipe can be supplied with oil through the oil nozzle, and the guide rail lubricating oil pipe provides lubricating oil on the slider of the linear guide.

[0013] In one embodiment of the present invention, a locking assembly is also included, and the locking assembly includes:

[0014] A pin bracket, arranged on the column;

[0015] A zero position latch, placed on the pin holder;

[0016] A proximity sensor is arranged on the pin rack, and the proximity sensor is used to detect whether the zero position latch is placed on the pin rack;

[0017] A first pin hole is provided on the column;

[0018] The second latch hole is provided on the carrier plate. When the carrier plate slides to a zero position relative to the column, the first latch hole and the second latch hole overlap in position, and the zero position latch can pass through the first latch hole and the second latch hole in sequence.

[0019] In one embodiment of the utility model, high and low position pointers and high and low position detection sensors are arranged at corresponding positions on the linear guide rail along the sliding direction of the linear guide rail.

[0020] In one embodiment of the utility model, a mechanical limit stop is provided at the top end of the linear guide rail along the sliding direction of the linear guide rail.

[0021] In one embodiment of the present invention, an oil box is arranged at the bottom of the column.

[0022] In one embodiment of the present invention, an accordion cover is further provided outside the linear guide rail.

[0023] In one embodiment of the utility model, a tank chain is further provided on the side of the column, one end of the tank chain is fixed, and the other end moves with the lifting of the carrier plate, and the tank chain is used for the cables and air pipes to pass through.

[0024] In order to solve the above technical problems, the utility model also provides a lifting roller bed, comprising the two lifting units mentioned above, and further comprising:

[0025] A roller bed table unit is arranged between the two lifting units, and both ends of the roller bed table unit are connected to the carrier plates of the two lifting units through supporting components;

[0026] A roller unit, comprising a plurality of rollers arranged on the roller bed table unit, the plurality of rollers being connected together by belts and pulleys to jointly support a sled for carrying a conveyed object, an eccentric positioning circular plate being arranged on the outer side of the roller, and the relative height of the rollers being adjustable by the positioning circular plate;

[0027] A roller driving unit drives the rollers to rotate synchronously;

[0028] A lifting drive unit is connected to the drive shafts of the two lifting units through a transmission shaft, and synchronously drives the two drive shafts to rotate;

[0029] A stopper unit is arranged on the roller bed table unit and is used to stop the sled from being transported on the roller bed table unit. When a failure occurs, the stopper unit stops the sled from continuing to be transported downward. A buffer is installed at the impact position and can withstand the impact of the sled repeatedly.

[0030] The positioning pin unit is arranged on the roller bed table unit. When the sled is transported to the designated position, the positioning pin unit confirms the position of the sled and mechanically locks it.

[0031] In one embodiment of the present invention, a control unit is also included, and the control unit also includes:

[0032] a valve island assembly for controlling the motion of the stopper unit and the dowel pin assembly;

[0033] Frequency converter assembly for controlling the roller drive unit.

[0034] In one embodiment of the utility model, a sensor unit is further included, including an in-position sensor and two stop sensors, wherein the in-position sensor is used to detect the entry position of the sled, and the stop sensor is used to control and confirm the stop position of the sled.

[0035] The above technical solution of the utility model has the following advantages compared with the prior art:

[0036] The lifting unit described in the utility model adopts a lifting method in which gears and racks are coordinated, which does not occupy the lifting space in the lifting direction, can realize low and high lifting movements, and is provided with a self-lubricating component to provide lubricating oil at the meshing position of the rack and gear and on the slider of the linear guide rail, to ensure that the wheel will not get stuck when the rack and gear are meshing and running, and to prevent overheating due to excessive friction, while ensuring the smoothness of the sliding block on the linear guide rail, thereby ensuring the stable operation of the entire lifting unit.

[0037] The lifting roller bed described in the utility model adopts the above-mentioned lifting unit to realize the lifting movement and horizontal transmission of the sled. The stopper unit and the positioning pin unit are provided to position the sled after the sled is transported to the right position, which is beneficial to improving the welding quality of the car body carried by the sled. In addition, the lifting roller bed adopts a standardized and modular design to adapt to different production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0039] Figure 1 It is a schematic diagram of the overall structure of the lifting unit of the utility model;

[0040] Figure 2 It is a structural schematic diagram of the lifting roller bed of the utility model;

[0041] Figure 3 It is a structural schematic diagram of the roller bed table unit of the utility model;

[0042] Figure 4 It is a structural schematic diagram of the roller unit of the utility model;

[0043] Figure 5 It is a structural schematic diagram of the positioning pin unit of the utility model;

[0044] Figure 6 It is a structural schematic diagram of the stopper unit of the utility model.

[0045] Description of the accompanying drawings: 100, lifting unit; 101, column; 102, linear guide; 103, rack; 104, carrier plate; 105, gear shaft assembly; 106, lubricating oil pot; 107, gear lubricating oil pipe; 108, oil nozzle; 109, guide rail lubricating oil pipe; 111, high and low position pointer; 112, mechanical limit stop; 113, accordion cover; 114, tank chain; 115, pin rack; 116, zero position pin; 117, proximity sensor; 118, first pin hole; 119, second pin hole; 200, roller bed table unit; 201, roller bed table frame; 202, roller bed table frame; 203, roller bed table frame; 204, roller bed table frame; 205, roller bed table frame; 206, roller bed table unit; 207, roller bed table frame; 208, roller bed table frame; 209, roller bed table frame; 210, roller bed table unit; 211, roller bed table frame; 212, roller bed table frame; 213, roller bed table frame; 214, roller bed table frame; 215, roller bed table frame; 216, roller bed table frame; 217, roller bed table frame; 218, roller bed table frame; 219, roller bed table frame; 220, roller bed table unit; 221, roller bed table frame; 222, roller bed table frame; 223, roller bed table frame; 224, roller bed table frame; 225, roller bed table frame; 226, roller bed table frame; 227, roller bed table frame; 228, roller bed table frame; 229, roller bed table frame; 230, roller bed table unit; 231, roller bed table frame; 232, roller bed table 2. Cover plate; 300. Roller unit; 301. Roller; 302. Positioning circular plate; 400. Roller drive unit; 500. Lifting drive unit; 600. Stopper unit; 601. Buffer; 602. Cylinder; 603. Guide rod; 604. Induction block; 605. Travel switch; 606. Lining plate; 607. Buffer mounting block; 700. Positioning pin unit; 701. Mounting bracket; 702. Connecting block; 703. Pneumatic latch cylinder; 704. Latch; 810. Valve island assembly; 820. Frequency converter assembly; 900. Sensor unit; 1000. Ground plate unit. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Example

[0047] Reference Figure 1 As shown, the utility model discloses a lifting unit, comprising: a column 101, a linear guide rail 102 and a rack 103 arranged on the column 101, a carrier plate 104 slidably arranged on the linear guide rail 102, and a gear shaft assembly 105 arranged on the carrier plate 104, wherein: the linear guide rail 102 and the rack 103 are both extended along the vertical direction of the column 101, the linear guide rail 102 and the rack 103 are parallel, and a gear shaft assembly 105 is arranged on the linear guide rail 102 along the vertical direction of the column 101. The linear guide rail 102 slides on a slider, the carrier plate 104 is arranged on the slider, the gear shaft assembly 105 includes a driving shaft and a gear connected by the driving shaft, the driving shaft drives the gear to rotate under the drive of an external driving source, the gear is meshed with the rack 103, and the rotational force is converted into a sliding force of the carrier plate 104 on the linear guide rail 102. The lifting mode of the gear and the rack 103 is adopted, and the lifting space will not be occupied in the lifting direction, and the lifting movement of the low position and the high position can be realized;

[0048] The lifting unit of the utility model also includes a self-lubricating component, which includes a lubricating oil pot 106, a gear lubricating oil pipe 107, an oil nozzle 108 and a guide rail lubricating oil pipe 109. The lubricating oil pot 106 is connected to the gear lubricating oil pipe 107 through a joint and then through an oil pipe. One side of the gear lubricating oil pipe 107 is installed on the carrier plate 104, and the other side extends to the position where the gear and the rack 103 are meshed. Lubricating oil is provided through the lubricating oil pot 106 to lubricate the gear and the rack 103, ensuring that the rack 103 and the gear will not mesh when running. In order to prevent the wheel from getting stuck and overheating caused by excessive friction, a lubrication connecting plate is installed on the side of the carrier plate 104, four oil nozzles 108 are installed on the outside, and four joints are installed on the inside. The joints are connected to the guide rail lubrication oil pipes 109 with quick joints, and the guide rail lubrication oil pipes 109 are respectively connected to the sliders of the four linear guides 102. According to the lubrication cycle of the linear guide 102, it is only necessary to add lubricating oil at the oil nozzle 108 with an oil gun to ensure the smoothness of the sliding block on the linear guide 102 and the stable operation of the entire lifting unit.

[0049] In this embodiment, in order to prevent the lubricating oil from dripping, an oil box is designed at the bottom of the column 101, and the oil box can catch the lubricating oil thrown out by the gears, thereby protecting the equipment site clean.

[0050] Specifically, along the sliding direction of the linear guide rail 102, a high and low position pointer 111 and a high and low position detection sensor are arranged at corresponding positions on the linear guide rail 102. The high and low position pointer 111 is arranged to facilitate observation of the position of the carrier plate 104, and the high and low position detection sensor can detect and confirm the moving position of the carrier plate 104.

[0051] In addition, a mechanical limit stop 112 is provided at the top of the linear guide rail 102 along the sliding direction of the linear guide rail 102. The mechanical limit stop can stop the sliding of the carrier plate 104 and prevent it from running outside the rack 103 when the gear shaft assembly 105 loses control due to an electrical failure.

[0052] Specifically, an accordion cover 113 is provided outside the linear guide rail 102 to protect the linear guide rail 102 from being affected by falling welding slag. The lower part of the accordion cover 113 is installed on the upper edge of the carrier plate 104 , and the upper part of the accordion cover 113 is installed on the top of the column 101 .

[0053] In this embodiment, a tank chain 114 is further provided on the side of the column 101. One end of the tank chain 114 is fixed, and the other end moves up and down with the carrier plate 104. The tank chain 114 is for the cables and air pipes to pass through. The cables and air pipes of all electrical components in the lifting unit are all connected to the external controller via the tank chain 114. The tank chain 114 moves up and down with the lifting unit, effectively protecting the wiring harness and air pipe from movement damage.

[0054] Specifically, the lifting unit of this embodiment also includes a locking assembly, which includes: a pin rack 115, a zero position latch 116 and a proximity sensor 117, wherein: the pin rack 115 is arranged on the column 101, and the zero position latch 116 is placed on the pin rack 115 when not in use. At this time, the lifting unit can work normally, and the proximity sensor 117 is arranged on the pin rack 115. The proximity sensor 117 is used to detect whether the zero position latch 116 is placed on the pin rack 115. When the latch is taken out of the pin rack 115, the signal of the proximity sensor 117 is switched. After the upper controller receives the latch signal, it will lock the motor to prevent accidents.

[0055] The locking assembly also includes a first latch hole 118 opened on the column 101 and a second latch hole 119 opened on the carrier 104. When the carrier 104 slides to a zero position relative to the column 101, the first latch hole 118 and the second latch hole 119 coincide with each other, and the zero position latch 116 can pass through the first latch hole 118 and the second latch hole 119 in sequence to mechanically lock the carrier 104, so that the carrier 104 stops stably at the mechanical zero position. Example

[0056] Based on the above embodiment 1, the utility model discloses a lifting roller bed, referring to Figure 2As shown, the lifting roller bed includes two of the above-mentioned lifting units 100, and also includes: a roller bed table unit 200 arranged between the two lifting units 100, a roller unit 300 arranged on the roller bed table unit 200, a roller drive unit 400, a lifting drive unit 500, a stopper unit 600 and a positioning pin unit 700, wherein: both ends of the roller bed table unit 200 are connected to the carrier plates 104 of the two lifting units 100 through support components; the roller unit 300 includes a plurality of rollers 301 arranged on the roller bed table unit 200, and the plurality of rollers 301 are connected together through belts and pulleys to jointly support a sled for carrying a conveyed object; the output shaft of the roller drive unit 400 is connected to the pulley to drive the pulley to rotate, and the pulley is driven by the belt, belt The plurality of rollers 301 are driven to rotate synchronously; the lifting drive unit 500 adopts a dual-output shaft motor, and two transmission shafts are extended from each end of the dual-output shaft motor, which are connected to the driving shafts of the two lifting units 100 through the transmission shafts, and the two driving shafts are driven to rotate synchronously, thereby realizing the lifting action of the carrier 104; the stopper unit 600 is used to stop the sled from being transported on the roller bed table unit 200, and in the event of a failure, the sled is stopped from continuing to be transmitted downward, and a buffer 601 is installed at the impact position, which can withstand the impact of the sled repeatedly; the positioning pin unit 700 confirms the position of the sled and mechanically locks the sled after the sled is transported to the specified position, which is beneficial to improving the welding quality of the car body carried on the sled. The lifting roller bed of this embodiment adopts a standardized and modular design to adapt to different production needs.

[0057] Reference Figure 3 As shown, the strength of the roller bed table frame 201 in the roller bed table unit 200 is crucial to the overall conveying capacity of the roller bed; in this embodiment, the steel plates are bent and then welded together using tooling, and structural cross braces are added inside to further increase the frame's ability to resist lateral impacts. A cover plate 202 is installed on the upper part of the roller bed table frame 201 to prevent accidents such as welding slag falling inside and damaging the belt during welding. A groove is opened in the cover plate 202, and the roller 301 of the roller unit 300 is embedded in the groove.

[0058] Reference Figure 4 As shown, the roller unit 300 also includes a positioning circular plate 302 eccentrically arranged on the outer side of the roller 301. The relative height of the roller 301 can be adjusted by the positioning circular plate 302, which can not only be used to tighten the belt, but also can fine-tune the height of the roller 301 in the vertical direction. The height adjustment stroke can reach ±10mm, which fully meets the height adjustment needs.

[0059] Reference Figure 5As shown, the positioning pin unit 700 includes: a mounting bracket 701, a connecting block 702, a pneumatic latch cylinder 703 and a latch 704. The pneumatic latch cylinder 703 is fixed to the inside of the roller bed table frame 201 by the mounting bracket 701 and the connecting block 702. The latch 704 is installed on the upper part of the pneumatic latch cylinder 703. When the sled is transported to the right position, the pneumatic latch cylinder 703 drives the latch 704 to extend and insert it into the positioning hole of the sled. The action of the pneumatic latch cylinder 703 triggers the output of a position signal from its own sensor. The upper control system confirms that the sled is transported to the right position through the electrical signal triggered by the insertion action of the latch 704.

[0060] Reference Figure 6 As shown, the stopper unit 600 is used to stop the sled from continuing to run to prevent accidents when the sled does not stop at the predetermined position. The front end of the stopper unit 600 is equipped with a buffer 601, which can withstand the impact of the sled repeatedly. The lower part is driven by the cylinder 602 to move the guide rod 603 up and down. The induction block 604 is installed on the guide rod 603 and moves with the guide rod 603. When the guide rod 603 runs to the high position, the travel switch 605 is triggered, and the travel switch feeds back a signal to the upper controller;

[0061] The cylinder 602 is installed on the side of the liner 606 through the cylinder connecting plate. Two oil-free bushings are embedded inside the liner. The guide rod 603 slides up and down in the oil-free bushings when it moves up and down; the cylinder head is connected to the connecting plate, and the connecting plate is fixedly connected to the guide rod 603, so that the guide rod and the cylinder move synchronously. The upper part of the guide rod 603 is connected to the buffer mounting block 607, and the buffer 601 is installed in the hole of the buffer mounting block 607.

[0062] Specifically, in a preferred embodiment, the positioning pin unit 700 can be installed on the lining plate 607 of the stopper unit 600. The design adopts a compact integrated design, integrating the positioning pin unit 700 and the stopper unit 600 together, greatly reducing the cost while taking into account the positioning function.

[0063] Reference Figure 1 As shown, in order to realize the control of the lifting roller bed of this embodiment, the lifting roller bed also includes a control unit, and the control unit includes: a valve island assembly 810 and a frequency converter assembly 820, wherein: the valve island assembly 810 is used to control the actions of the stopper unit 600 and the positioning pin unit 700, and the frequency converter assembly 820 is used to control the roller drive unit 400. Protective covers and transparent PVC soft curtains are provided on the outsides of the valve island assembly 810 and the frequency converter assembly 820, which can facilitate the observation and operation of the indicator lights of the valve island, and can also protect the valve island assembly 810 and the frequency converter assembly 820 to prevent welding slag from scalding the air pipe, etc.

[0064] Reference Figure 1 As shown, the lifting roller bed also includes a sensor unit 900, including an in-position sensor and two stop sensors. When the sled is transferred to the roller bed, the in-position sensor senses the side of the sled to detect the entry position of the sled. When the sled is transported into place on the roller bed, the stop sensor outputs a signal, and the upper system controls the parking and confirms the sled in place information.

[0065] Reference Figure 1 As shown, the lifting roller bed also includes a ground plate unit 1000, through which the lifting roller bed is reliably connected to the ground. First, the ground plate is fixed to the ground with anchor chemical bolts. After adjusting the height of the whole machine, the equipment is welded to the ground plate with welding steel bars.

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A lifting unit, characterized in that: include: Column; A linear guide rail is arranged on the column, and a slider is arranged on the linear guide rail to slide along the linear guide rail; A rack, arranged on the column and parallel to the linear guide rail; A carrier plate connected to the slider and slidably arranged on the linear guide rail; A gear shaft assembly is arranged on the carrier plate, comprising a driving shaft and a gear connected by the driving shaft, wherein the driving shaft drives the gear to rotate under the drive of an external driving source, and the gear meshes with the rack to convert the rotational force into a sliding force of the carrier plate on the linear guide rail; The self-lubricating component includes a lubricating oil pot, a gear lubricating oil pipe, an oil nozzle and a guide rail lubricating oil pipe. The lubricating oil pot is connected to the gear lubricating oil pipe, the gear lubricating oil pipe provides lubricating oil at the meshing position of the rack and the gear, the oil nozzle is connected to the guide rail lubricating oil pipe, the guide rail lubricating oil pipe can be supplied with oil through the oil nozzle, and the guide rail lubricating oil pipe provides lubricating oil on the slider of the linear guide.

2. The lifting unit according to claim 1, characterized in that: Also included is a locking assembly, the locking assembly comprising: A pin bracket, arranged on the column; A zero position latch, placed on the pin holder; A proximity sensor is arranged on the pin rack, and the proximity sensor is used to detect whether the zero position latch is placed on the pin rack; A first pin hole is provided on the column; The second latch hole is provided on the carrier plate. When the carrier plate slides to a zero position relative to the column, the first latch hole and the second latch hole overlap in position, and the zero position latch can pass through the first latch hole and the second latch hole in sequence.

3. The lifting unit according to claim 1, characterized in that: Along the sliding direction of the linear guide rail, high and low position pointers and high and low position detection sensors are arranged at corresponding positions on the linear guide rail.

4. The lifting unit according to claim 1, characterized in that: A mechanical limit stop is arranged at the top end of the linear guide rail along the sliding direction of the linear guide rail.

5. The lifting unit according to claim 1, characterized in that: An oil box is arranged at the bottom of the column.

6. The lifting unit according to claim 1, characterized in that: An accordion cover is also arranged outside the linear guide rail.

7. The lifting unit according to claim 1, characterized in that: A tank chain is also arranged on the side of the column, one end of which is fixed, and the other end of which moves along with the lifting of the carrier plate, and the tank chain is used for cables and air pipes to pass through.

8. A lifting roller bed, comprising two lifting units according to any one of claims 1 to 7, characterized in that: Also includes: A roller bed table unit is arranged between the two lifting units, and both ends of the roller bed table unit are connected to the carrier plates of the two lifting units through supporting components; A roller unit, comprising a plurality of rollers arranged on the roller bed table unit, the plurality of rollers being connected together by belts and pulleys to jointly support a sled for carrying a conveyed object, an eccentric positioning circular plate being arranged on the outer side of the roller, and the relative height of the rollers being adjustable by the positioning circular plate; A roller driving unit drives the rollers to rotate synchronously; A lifting drive unit is connected to the drive shafts of the two lifting units through a transmission shaft, and synchronously drives the two drive shafts to rotate; A stopper unit is arranged on the roller bed table unit and is used to stop the sled from being transported on the roller bed table unit. When a failure occurs, the stopper unit stops the sled from continuing to be transported downward. A buffer is installed at the impact position and can withstand the impact of the sled repeatedly. The positioning pin unit is arranged on the roller bed table unit. When the sled is transported to the designated position, the positioning pin unit confirms the position of the sled and mechanically locks it.

9. The lifting roller bed according to claim 8, characterized in that: Also includes a control unit, the control unit also includes: a valve island assembly for controlling the motion of the stopper unit and the dowel pin assembly; Frequency converter assembly for controlling the roller drive unit.

10. The lifting roller bed according to claim 8, characterized in that: The utility model also comprises a sensor unit, which comprises an in-position sensor and two stop sensors. The in-position sensor is used for detecting the entry position of the sled, and the stop sensor is used for controlling and confirming the stop position of the sled.

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