A braking device and braking method of an RGV trolley for cardboard transportation

Abstract

The present invention relates to the field of brake technology, and in particular to a brake device for an RGV trolley for transporting cardboard and a braking method thereof, comprising a brake assembly, a mounting plate, a telescopic frame, a first airbag and a second airbag, wherein the first airbag and the second airbag are both arranged inside the telescopic frame, the telescopic frame is provided with a through slot, the mounting plate horizontally passes through the through slot, the first airbag movably abuts against the upper side of the mounting plate, the second airbag movably abuts against the lower side of the mounting plate, the telescopic frame moves up and down relative to the mounting plate through the through slot, the brake assembly is fixedly mounted on the bottom outer side of the telescopic frame, the device inflates the first airbag and the second airbag by switching, and then drives the telescopic frame to achieve a lifting effect, so that when the telescopic frame descends, it drives the brake pads to squeeze the guide rail for braking, avoiding the use of wheels for sudden braking, preventing wheel locking and wear, and ensuring that the outer circle contact surface of the wheel remains in a uniform state, thereby making the trolley remain stable during driving.

Description

Technical Field

[0001] The present invention relates to the technical field of brakes, and in particular to a brake device and a brake method of an RGV trolley for transporting cardboard. Background Art

[0002] RGV is the abbreviation of Rail Guided Vehicle, also known as rail shuttle trolley. RGV trolleys can be used in various warehouses with high-density storage methods. The trolley channel can be designed to any length, which can increase the storage capacity of the entire warehouse. During operation, there is no need for forklifts to enter the aisle, making it safer. By taking advantage of the fact that forklifts do not need to enter the aisle and cooperating with the trolley's rapid operation in the aisle, the operating efficiency of the warehouse is effectively improved. Currently, RGV trolleys used for cardboard logistics all use their own travel motors for emergency braking, and the wheels are in line contact with the guide rails, which is prone to wear when the wheels are suddenly braked and locked. Repeated wear turns the round wheels into polygons, which causes the trolley to jump when driving. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a braking device and a braking method for an RGV trolley for cardboard transportation, which avoids the use of wheels for sudden braking, prevents wheel locking and wear, and thus keeps the trolley stable during driving.

[0004] The technical solution adopted in the present invention is:

[0005] A brake device for an RGV trolley for transporting cardboard includes a brake assembly, a mounting plate, a telescopic frame, a first airbag, and a second airbag. The first airbag and the second airbag are both arranged inside the telescopic frame. The telescopic frame is provided with a through slot, and the mounting plate passes through the through slot horizontally. The first airbag movably abuts against the upper side of the mounting plate, and the second airbag movably abuts against the lower side of the mounting plate. The telescopic frame moves up and down relative to the mounting plate through the through slot, and the brake assembly is fixedly mounted on the bottom outer side of the telescopic frame.

[0006] Preferably, the brake assembly includes an L-shaped block, a T-shaped plate and a brake pad fixed to the bottom of the T-shaped plate. Two L-shaped blocks are symmetrically provided and fixed to the bottom of the telescopic frame. The two ends of the T-shaped plate are respectively slidably engaged in the two L-shaped blocks. Both sides of each L-shaped block are connected to the limit plate by screws, and the front and rear sides of the T-shaped plate are abutted against the limit plate.

[0007] Preferably, the brake pad is arranged in an inverted trapezoidal platform, and a number of avoidance holes are evenly arranged on the top of the T-shaped plate, nuts are provided in the avoidance holes, countersunk holes corresponding to the avoidance holes are provided on the brake pad, and bolts connected to the nuts are provided in the countersunk holes.

[0008] Preferably, the mounting plate is connected to a mounting frame, and a guide plate is detachably connected to the inner side of the mounting frame. Four guide plates are provided and respectively abut against four sides of the telescopic frame.

[0009] Preferably, it further includes an air tank, which is connected to the first airbag and the second airbag respectively through solenoid valves.

[0010] Preferably, a pressure regulator is connected between the first airbag and the solenoid valve, and a quick exhaust valve is connected between the first airbag and the pressure regulator.

[0011] Preferably, a safety valve is connected between the gas storage tank and the solenoid valve, and a pressure gauge is connected between the safety valve and the gas storage tank.

[0012] Preferably, a pressure switch is further included, the two ends of the pressure switch are respectively connected to the air inlet and air outlet of the air storage tank, the air storage tank is provided with a switch valve, and the air inlet is connected to an air compressor.

[0013] The present invention also provides a braking method for a braking device of an RGV trolley for cardboard transportation. Preferably, an air tank continuously supplies air to a first airbag through an electromagnetic valve, so that the lower side of the first airbag presses the mounting plate and the upper side thereof lifts the telescopic frame, thereby keeping the brake assembly and the guide rail in a non-contact state during non-emergency braking of the RGV trolley.

[0014] When the RGV receives an emergency brake signal during driving, the solenoid valve is activated to inflate the second airbag, so that the upper side of the second airbag presses against the mounting plate and the lower side presses down the telescopic frame, thereby causing the brake assembly fixed on the telescopic frame to squeeze the guide rail to brake;

[0015] While the second airbag is inflated, the telescopic frame squeezes the first airbag, and the gas inside the first airbag is quickly discharged from the quick exhaust valve.

[0016] Preferably, the emergency brake signal is triggered by a laser scanner mounted on the RGV trolley identifying an obstacle and manually pressing an emergency stop button mounted on the RGV trolley;

[0017] The laser scanner divides the area in the RGV's forward direction into an emergency stop zone and a deceleration zone, and sets the range of the deceleration zone and the emergency stop zone according to the real-time speed of the RGV.

[0018] When the obstacle enters the deceleration zone, the RGV car slows down;

[0019] When an obstacle enters the emergency stop zone, the emergency brake signal is triggered.

[0020] The beneficial effects of the present invention are:

[0021] The braking device of the RGV trolley for cardboard transportation inflates the first and second airbags by switching the inflated air, thereby driving the telescopic frame to achieve a lifting effect. When the telescopic frame descends, it drives the brake pads to squeeze the guide rails for braking, avoiding the use of wheels for sudden braking, preventing wheel locking and wear, and ensuring that the outer contact surface of the wheel remains uniform, thereby keeping the trolley stable during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 This is a connection diagram of the brake device.

[0024] Figure 3 This is an exploded diagram of the brake assembly.

[0025] Figure 4 This is a schematic diagram of the installation of the telescopic rack.

[0026] Figure 5 for Figure 4 Schematic diagram of the decomposition.

[0027] Figure 6 Schematic diagram of the connection between the L-shaped block and the limiting plate.

[0028] Figure 7 for Figure 6 Schematic diagram of the decomposition.

[0029] In the figure: 1. Brake assembly; 101. L-shaped block; 102. T-shaped plate; 103. Brake pad; 104. Limit plate; 105. Avoidance hole; 106. Nut; 107. Countersunk hole; 108. Bolt; 2. Mounting plate; 3. Telescopic frame; 4. First airbag; 5. Second airbag; 6. Mounting frame; 7. Guide plate; 8. Air tank; 9. Solenoid valve; 10. Pressure regulator; 11. Quick exhaust valve; 12. Safety valve; 13. Pressure gauge; 14. Pressure switch; 15. Switch valve; 16. Air compressor; 17. Guide rail; 18. Wheel; 19. Through groove. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1The present invention provides a technical solution: a brake device for an RGV trolley for transporting cardboard, comprising a brake assembly 1, a mounting plate 2, a telescopic frame 3, a first airbag 4 and a second airbag 5. The first airbag 4 and the second airbag 5 are both arranged inside the telescopic frame 3. The telescopic frame 3 is provided with a through slot 19. The mounting plate 2 horizontally passes through the through slot 19. The first airbag 4 movably abuts against the upper side of the mounting plate 2, and the second airbag 5 movably abuts against the lower side of the mounting plate 2. The telescopic frame 3 moves up and down relative to the mounting plate 2 through the through slot 19, and the brake assembly 1 is fixedly mounted on the bottom outer side of the telescopic frame 3.

[0032] There are several first airbags 4 and second airbags 5 arranged in a rectangular array. In order to improve the structural reliability and the smoothness of braking, in this embodiment, preferably, there are four first airbags 4 arranged in a rectangular array and two second airbags 5 arranged in a rectangular array, wherein the volume of the second airbag 5 is larger than that of the first airbag 4, so that the first airbag 4 and the second airbag 5 can smoothly drive the telescopic frame 3 to rise and fall.

[0033] See also Figure 6-Figure 7 In order to facilitate the maintenance and replacement of the brake assembly 1, in this embodiment, preferably, the brake assembly 1 includes an L-shaped block 101, a T-shaped plate 102 and a brake pad 103 fixed to the bottom of the T-shaped plate 102. The L-shaped block 101 is symmetrically provided with two and fixed to the bottom of the telescopic frame 3. The two ends of the T-shaped plate 102 are respectively slidably engaged in the two L-shaped blocks 101. Both sides of each L-shaped block 101 are connected to the limiting plate 104 by screws. The front and rear sides of the T-shaped plate 102 are in contact with the limiting plate 104. The purpose is to facilitate the removal of the limiting plate 104 from the L-shaped block 101 by removing the horizontally arranged screws. The brake pad 103 can be easily replaced or repaired by sliding the T-shaped plate 102 between the two L-shaped blocks 101. After replacement, the T-shaped plate 102 is inserted between the two L-shaped blocks 101 and the limit plate 104 is locked by screws to achieve limit locking installation of the T-shaped plate 102, which is convenient for installation and disassembly. Because the brake assembly 1 is located at the bottom of the trolley and the distance between the bottom of the trolley and the ground is small, if the T-shaped plate 102 is locked to the bottom of the trolley by vertically set screws, it is difficult to find the position of the screws and it is difficult to install and disassemble.

[0034] See also Figure 3In order to save materials and reduce costs, in this embodiment, preferably, the brake pad 103 is arranged in an inverted trapezoidal platform, and a number of avoidance holes 105 are evenly arranged on the top of the T-shaped plate 102. Nuts 106 are provided in the avoidance holes 105, and countersunk holes 107 corresponding to the avoidance holes 105 are provided on the brake pad 103. Bolts 108 connected with the nuts 106 are provided in the countersunk holes 107. The purpose is to install the brake pad 103 on the bottom of the T-shaped plate 102 in a detachable manner. When the brake pad 103 is severely worn, it is only necessary to disassemble and replace the brake pad 103, and there is no need to replace the T-shaped plate 102 and the brake pad 103 as a whole, thereby saving costs.

[0035] See also Figure 4-Figure 5 To improve the lifting accuracy of the telescopic frame 3 and enhance the stability and reliability of the structure, in this embodiment, the mounting plate 2 is preferably connected to a mounting frame 6. A guide plate 7 is detachably connected to the inner side of the mounting frame 6. Four guide plates 7 are provided, each abutting against the four sides of the telescopic frame 3. This ensures the accuracy of the lifting movement of the telescopic frame 3 and ensures that the bottom contact surface of the telescopic frame 3 always remains horizontal and in contact with the guide rail 17, ensuring friction braking with the maximum contact surface and improving the braking effect. The mounting plate 2 and mounting frame 6 are both fixedly connected to the frame of the RGV vehicle.

[0036] See also Figure 2 In order to facilitate the alternating inflation of the first airbag 4 and the second airbag 5, in this embodiment, preferably, an air tank 8 is also included, which is connected to the first airbag 4 and the second airbag 5 respectively through an electromagnetic valve 9. The purpose is to alternately inflate the first airbag 4 and the second airbag 5, so that the telescopic frame 3 is raised and lowered, thereby switching the brake pad 103 to a braking state.

[0037] In order to facilitate the rapid exhaust of the first airbag 4 while the second airbag 5 is inflated, thereby increasing the inflation rate of the second airbag 5, in this embodiment, preferably, a pressure regulator 10 is connected between the first airbag 4 and the solenoid valve 9. The first airbag 4 only needs to lift the telescopic frame 3, so the first airbag 4 only needs a lower air pressure. The pressure regulator 10 is used to make the air pressure of the first airbag 4 lower than that of the second airbag 5 to prevent the air pressure of the first airbag 4 from being too high. A quick exhaust valve 11 is connected between the first airbag 4 and the pressure regulator 10.

[0038] In order to facilitate pressure relief when the air pressure is too high, in this embodiment, preferably, a safety valve 12 is connected between the air tank 8 and the solenoid valve 9, and a pressure gauge 13 is connected between the safety valve 12 and the air tank 8, so as to facilitate the staff to read the air pressure and detect whether the air circuit is working normally.

[0039] In order to improve the degree of intelligence and facilitate the shutdown and cleaning of the gas tank 8, in this embodiment, preferably, a pressure switch 14 is also included. The two ends of the pressure switch 14 are respectively connected to the air inlet and air outlet of the gas tank 8. The gas tank 8 is provided with a switch valve 15, and its air inlet is connected to an air compressor 16. By closing the switch valve 15, the gas tank 2 can be conveniently cleaned. When the pressure switch 14 detects that the gas tank 8 is below the lower limit value, the pneumatic air compressor 16 will be used to inflate the gas tank 2 and stop after reaching the pressure setting pressure, thereby improving the degree of intelligence.

[0040] The use of a low-cost oil-free silent air compressor 16 and the first airbag 4 and the second airbag 5 with a short driving stroke and high output improve the reliability of the brake.

[0041] The present invention also provides a braking method for the braking device of the RGV trolley for cardboard transportation.

[0042] The air tank 8 continuously supplies air to the first airbag 4 through the solenoid valve 9, so that the lower side of the first airbag 4 presses the mounting plate 2 and the upper side thereof lifts the telescopic frame 3, thereby keeping the brake assembly 1 and the guide rail 17 in a non-contact state during non-emergency braking of the RGV trolley;

[0043] When the RGV receives an emergency brake signal during driving, the solenoid valve 9 is activated to inflate the second airbag 5, so that the upper side of the second airbag 5 presses against the mounting plate 2 and the lower side presses down the telescopic frame 3, thereby causing the brake assembly 1 fixed on the telescopic frame 3 to squeeze the guide rail 17 to brake;

[0044] While the second airbag 5 is inflated, the telescopic frame 3 squeezes the first airbag 4 , and the gas inside the first airbag 4 is quickly discharged from the quick exhaust valve 11 .

[0045] In order to brake according to different conditions, in this embodiment, preferably, the triggering method of the emergency brake signal includes the laser scanner installed on the RGV trolley identifying an obstacle and manually pressing the emergency stop button installed on the RGV trolley;

[0046] The laser scanner divides the RGV's forward direction area into an emergency stop zone and a deceleration zone, and sets the range of the deceleration zone and the emergency stop zone according to the RGV's real-time speed. The laser scanner is a fan-shaped laser distance sensor.

[0047] When the obstacle enters the deceleration zone, the RGV car slows down;

[0048] When an obstacle enters the emergency stop zone, the emergency brake signal is triggered.

[0049] The working principle and use process of the present invention are as follows: when the pressure switch 14 detects that the air tank 8 is below the lower limit value, the pneumatic air compressor 16 will inflate the air tank 8 and stop when the pressure reaches the set pressure.

[0050] The air tank 8 continuously supplies air to the first airbag 4 through the solenoid valve 9, so that the RGV trolley keeps the brake pad 103 and the guide rail 17 in a non-contact state during non-emergency braking.

[0051] When the RGV trolley is moving and the sector laser distance sensor detects that it has entered the emergency stop zone and encountered an obstacle, the solenoid valve 9 is actuated and switched to inflating the second airbag 5, so that the second airbag 5 pushes the telescopic frame 3, thereby causing the brake pad 103 fixed on the telescopic frame 3 to press against the guide rail 17 to increase friction and brake, and at the same time, the wheel 18 close to the brake device is separated from the guide rail 17, thereby extending the service life of the wheel 18.

[0052] When the second airbag 5 is inflated, the first airbag 4 is also squeezed, and the first airbag 4 is quickly deflated in conjunction with the quick exhaust valve 11, which also allows the second airbag 5 to be inflated as quickly as possible.

[0053] Emergency stop control: In any case, as long as the emergency stop button is pressed, the airbag brake is immediately triggered and the RGV trolley is braked to a stop by the brake pad 103. After the emergency stop button is reset, the reset button installed on the RGV trolley needs to be pressed to cancel the airbag brake.

[0054] Obstacle avoidance control: When the RGV is traveling in a straight line, the speed detection device measures the vehicle's real-time speed. Based on the speed, the sector laser distance sensor divides the RGV's forward direction into four levels of protection zones. The lower the speed, the smaller the protection zone. Each protection zone is divided into a deceleration zone and an emergency stop zone. When an obstacle is in the deceleration zone, the vehicle only decelerates and stops, and the airbag brakes are not activated. When the obstacle enters the emergency stop zone, the airbag brakes are triggered, and the RGV is stopped by brake pads 103. After the obstacle disappears, normal driving resumes after a two-second delay.

[0055] Pressure monitoring: The first airbag 4 and the second airbag 5 are both connected to a pressure detector. When insufficient air pressure is detected, an alarm will be issued to remind the user to handle it, and the RGV trolley will not be able to start.

[0056] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A braking device for an RGV trolley used for cardboard transportation, characterized by: The invention comprises a brake assembly (1), a mounting plate (2), a telescopic frame (3), a first airbag (4) and a second airbag (5), wherein the first airbag (4) and the second airbag (5) are both arranged inside the telescopic frame (3), the telescopic frame (3) is provided with a through slot (19), the mounting plate (2) is horizontally passed through the through slot (19), the first airbag (4) is movably abutted against the upper side of the mounting plate (2), the second airbag (5) is movably abutted against the lower side of the mounting plate (2), the telescopic frame (3) moves up and down relative to the mounting plate (2) through the through slot (19), the brake assembly (1) is fixedly mounted on the bottom outer side of the telescopic frame (3), the brake assembly (1) comprises an L-shaped block (101), a T-shaped plate (102) and a brake pad (103) fixed to the bottom of the T-shaped plate (102), the L-shaped block (101) is symmetrically provided with two brake pads fixed to the telescopic frame (3), and the brake pads (103) are fixed to the bottom of the T-shaped plate (102). The bottom of the retractable frame (3), the two ends of the T-shaped plate (102) are respectively slidably engaged in the two L-shaped blocks (101), and both sides of each L-shaped block (101) are connected to the limiting plate (104) by screws. The front and rear sides of the T-shaped plate (102) are in contact with the limiting plate (104). The brake pad (103) is arranged in an inverted trapezoidal platform. The top of the T-shaped plate (102) is evenly arranged with a plurality of avoidance holes (105), and the avoidance holes (105) are provided with nuts (106). The brake pad (103) is provided with countersunk holes (107) corresponding to the avoidance holes (105), and the countersunk holes (107) are provided with bolts (108) connected with the nuts (106). The brake pad also includes an air tank (8), and the air tank (8) is connected to the first air bag (4) and the second air bag (5) respectively through an electromagnetic valve (9).

2. The braking device for the RGV trolley for cardboard transportation according to claim 1, characterized in that: The mounting plate (2) is connected to a mounting frame (6), and the inner side of the mounting frame (6) is detachably connected to a guide plate (7). Four guide plates (7) are provided and respectively abut against four sides of the telescopic frame (3).

3. The braking device for the RGV trolley for cardboard transportation according to claim 1, characterized in that: A pressure regulator (10) is connected between the first airbag (4) and the solenoid valve (9), and a quick exhaust valve (11) is connected between the first airbag (4) and the pressure regulator (10).

4. The braking device for the RGV trolley for cardboard transportation according to claim 3 is characterized in that: A safety valve (12) is connected between the gas storage tank (8) and the electromagnetic valve (9), and a pressure gauge (13) is connected between the safety valve (12) and the gas storage tank (8).

5. The braking device for the RGV trolley for cardboard transportation according to claim 3 is characterized in that: The invention also includes a pressure switch (14), the two ends of which are respectively connected to the air inlet and the air outlet of the air storage tank (8). The air storage tank (8) is provided with a switch valve (15), and the air inlet of the air storage tank is connected to an air compressor (16).

6. A braking method for a braking device of an RGV trolley for cardboard transportation according to any one of claims 3 to 5, characterized in that: The air storage tank (8) continuously supplies air to the first air bag (4) through the electromagnetic valve (9), so that the lower side of the first air bag (4) presses the mounting plate (2) and the upper side thereof lifts the telescopic frame (3), thereby keeping the brake assembly (1) and the guide rail in a non-contact state during non-emergency braking of the RGV trolley; When the RGV receives an emergency brake signal during its travel, the solenoid valve (9) is activated to inflate the second airbag (5), causing the upper side of the second airbag (5) to press against the mounting plate (2) and the lower side of the second airbag to press down the telescopic frame (3), thereby causing the brake assembly (1) fixed on the telescopic frame (3) to press against the guide rail to brake; While the second airbag (5) is inflated, the telescopic frame (3) squeezes the first airbag (4), and the gas inside the first airbag (4) is quickly discharged from the quick exhaust valve (11).

7. The braking method of the RGV trolley for cardboard transportation according to claim 6, characterized in that: The emergency brake signal is triggered by the laser scanner installed on the RGV trolley identifying an obstacle and manually pressing the emergency stop button installed on the RGV trolley; The laser scanner divides the area in the RGV's forward direction into an emergency stop zone and a deceleration zone, and sets the range of the deceleration zone and the emergency stop zone according to the real-time speed of the RGV. When the obstacle enters the deceleration zone, the RGV car slows down; When an obstacle enters the emergency stop zone, the emergency brake signal is triggered.

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