Unmanned transport vehicle with overweight early warning structure

Abstract

The utility model discloses an unmanned transport vehicle with an overweight early warning structure, and mainly relates to the technical field of unmanned transport vehicles. Comprising a bottom frame and a bracket arranged on the bottom frame in a sliding mode, a plurality of sliding sleeves are arranged on the bottom frame, a plurality of sliding rods connected with the sliding sleeves in a sliding mode are arranged on the bracket, first springs are arranged between the sliding rods and the sliding sleeves, a sliding block is connected to the bottom frame in a sliding mode, a check block is arranged at the end of the sliding block, and a plurality of inductors used in cooperation with the check block are arranged on the bracket. The utility model has the beneficial effects that the problem that the running speed of the transport vehicle cannot be regulated and controlled according to the cargo weight is solved, and the cargo transportation efficiency of the transport vehicle is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of unmanned transport vehicles, specifically an unmanned transport vehicle with an overload warning structure. Background Technology

[0002] AGV (Automated Guided Vehicle) refers to a transport vehicle equipped with electromagnetic or optical automatic guidance devices, capable of traveling along a prescribed guide path, and possessing safety protection and various transfer functions. In industrial applications, it is a transport vehicle that does not require a driver and can be powered by a rechargeable battery. With the continuous development of the Internet of Things (IoT), IoT components are also being used in AGV unmanned transport equipment.

[0003] However, some existing IoT-based AGV unmanned handling equipment lacks overload warning functions and cannot control the speed of the transport vehicle according to the weight of the goods. This results in an unstable transport process, which can easily lead to the goods tipping over and affect the normal transportation of subsequent goods. Utility Model Content

[0004] The purpose of this invention is to provide an unmanned transport vehicle with an overweight warning structure, which solves the problem that the vehicle's speed cannot be adjusted according to the weight of the goods, thereby improving the efficiency of the vehicle in transporting goods.

[0005] To achieve the above objectives, the utility model employs the following technical solution:

[0006] An unmanned transport vehicle with an overweight warning structure includes a chassis and a bracket slidably mounted on the chassis. The chassis is provided with a plurality of sliding sleeves, and the bracket is provided with a plurality of sliding rods slidably connected to the sliding sleeves. A first spring is provided between the sliding rods and the sliding sleeves. A slider is slidably connected to the chassis, and a stop is provided at the end of the slider. The bracket is provided with a plurality of sensors that cooperate with the stop.

[0007] Furthermore, a roller is rotatably connected to the slider, a wedge block is slidably connected to the bracket, one side of the wedge block is provided with an inclined surface that rolls into contact with the roller, and a second spring is provided between the slider and the bracket.

[0008] Furthermore, the bracket is provided with a guide rod that is slidably connected to the slider. After the guide rod passes through the slider, it is provided with a protrusion. The second spring is sleeved on the outside of the guide rod and is disposed between the protrusion and the slider.

[0009] Furthermore, one side of the wedge block is provided with a sliding plate that is slidably connected to the bracket, and one side of the sliding plate is provided with a guide post. A turntable is rotatably connected to the bracket, and the turntable is provided with a vortex groove that contacts the guide post.

[0010] Furthermore, a rotating shaft connected to a turntable is rotatably connected to the bracket, and a driven wheel is provided at the end of the rotating shaft. A rotary motor is provided on the bracket, and a drive wheel for driving the driven wheel to rotate is provided at the movable end of the rotary motor.

[0011] Furthermore, the driven wheel is provided with a plurality of limiting grooves, and a pawl is provided between two adjacent limiting grooves. Limiting blocks are provided on the left and right sides of the drive wheel, and pawls are provided on the upper and lower sides of the drive wheel. The limiting blocks contact the limiting grooves and restrict the driven wheel from rotating on the bracket. The pawls contact the pawls and drive the driven wheel to rotate on the bracket.

[0012] Furthermore, the base frame is provided with a damper that contacts the bracket.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. When goods are placed on the pallet, the weight of the goods acts on the pallet, and the resulting force causes the pallet to slide on the base frame. It is slidably connected to the sliding sleeve through the sliding rod, which guides the sliding of the pallet on the base frame, improves the stability of the pallet sliding on the base frame, prevents the goods from falling off, and thus improves the transportation efficiency of the unmanned transport vehicle.

[0015] 2. Additionally, during the downward movement of the bracket, the end of the slide bar compresses the first spring, and the rebound force generated by the compressed first spring counteracts the weight of the goods until the overall structure is in a stable state. Furthermore, the degree of upward and downward movement of the bracket on the base frame is adjusted according to the weight of the goods. The bracket also drives the stop block to slide along the base frame until the entire structure is stable, and the stop block moves to the front of the corresponding sensor. When the stop block approaches the corresponding sensor, the dielectric constant between the stop block and the electrode changes, causing a change in capacitance, thereby determining that the weight of the goods is within a certain range and feeding back a signal to the control center. Through a pre-set program, the driving speed of the unmanned transport vehicle is adjusted to prevent the unmanned transport vehicle from moving too fast, which could cause the goods to fall, thus improving the transport efficiency of the unmanned transport vehicle. Simultaneously, when the goods are overweight, an alarm is issued in a timely manner to prevent forced transport of overweight goods from causing overload of the power system, thereby extending the service life of the unmanned transport vehicle. Attached Figure Description

[0016] Appendix Figure 1 This is a structural schematic diagram of the bracket of this utility model.

[0017] Appendix Figure 2 This is a schematic diagram of the structure of the first spring of this utility model.

[0018] Appendix Figure 3 This is a schematic diagram of the structure of the wedge block of this utility model.

[0019] Appendix Figure 4 This is a schematic diagram of the slider of this utility model.

[0020] Appendix Figure 5 This is a schematic diagram of the vortex groove of this utility model.

[0021] Appendix Figure 6 This is a schematic diagram of the drive wheel of this utility model.

[0022] The labels shown in the attached diagram:

[0023] 1. Base frame; 2. Bracket; 3. Sliding sleeve; 4. Sliding rod; 5. First spring; 6. Sliding block; 7. Stop block; 8. Sensor; 9. Roller; 10. Wedge block; 11. Inclined surface; 12. Second spring; 13. Guide rod; 14. Protrusion; 15. Slide plate; 16. Guide post; 17. Turntable; 18. Vortex groove; 19. Rotating shaft; 20. Driven wheel; 21. Rotary motor; 22. Drive wheel; 23. Limiting groove; 24. Dial groove; 25. Limiting block; 26. Dial block; 27. Damper. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0025] This utility model provides an unmanned transport vehicle with an overload warning structure, such as... Figures 1-3 As shown, the system includes a base frame 1 and a bracket 2 slidably mounted on the base frame 1. The base frame 1 has several sliding sleeves 3, and the bracket 2 has several sliding rods 4 slidably connected to the sliding sleeves 3. A first spring 5 is provided between the sliding rods 4 and the sliding sleeves 3. A slider 6 is slidably connected to the base frame 1, and a stop block 7 is provided at the end of the slider 6. The bracket 2 has several sensors 8 that cooperate with the stop blocks 7. Specifically, the E2K-X8ME1 model capacitive sensor can be referred to. When goods are placed on the bracket 2, the weight of the goods acts on the bracket 2, and the force generated drives the bracket 2 to slide on the base frame 1. The sliding rods 4 and sliding sleeves 3 are slidably connected, which guides the sliding of the bracket 2 on the base frame 1, improves the stability of the bracket 2 sliding on the base frame 1, prevents the goods from falling, and thus improves the transportation efficiency of the unmanned transport vehicle.

[0026] In addition, during the downward movement of the bracket 2, the first spring 5 is compressed by the slide rod 4, and the rebound force generated by the compression of the first spring 5 counteracts the weight of the goods until the overall structure is in a stable state. The degree of vertical movement of the bracket 2 on the base frame 1 is changed according to the weight of the goods. In addition, the bracket 2 will drive the stop block 7 to slide on the base frame 1 together until the whole structure is stable. The stop block 7 also moves to the front end of the corresponding sensor 8. When the stop block 7 approaches the corresponding sensor 8, the dielectric constant between the stop block 7 and the electrode changes, resulting in a change in capacitance value. This determines that the weight of the goods is within a certain range and feeds back a signal to the control center. Through a pre-set program, the driving speed of the unmanned transport vehicle is adjusted to prevent the unmanned transport vehicle from going too fast and causing the goods to fall, thereby improving the transportation efficiency of the unmanned transport vehicle. At the same time, when the goods are overweight, an alarm is issued in time to prevent the forced transportation of overweight goods from causing overload of the power system, thereby improving the service life of the unmanned transport vehicle.

[0027] Preferred, such as Figure 3 and Figure 4 As shown, a roller 9 is rotatably connected to the slider 6, and a wedge block 10 is slidably connected to the bracket 2. One side of the wedge block 10 has an inclined surface 11 that rolls in contact with the roller 9. A second spring 12 is provided between the slider 6 and the bracket 2. When the first spring 5 is stretched and deformed for a long time, the microstructure inside the material will change, resulting in fatigue. This will cause the elastic performance of the first spring 5 to gradually decrease, resulting in the first spring 5 producing a larger deformation under the same external force. Since the weight of the bracket 2 itself has not changed, in the initial state, the bracket 2 will further compress the first spring 5, causing the stop block 7 in the initial state to move down. At the same time, due to the coefficient of the first spring 5 Descending will more easily trigger an overweight signal. At this point, the wedge block 10 needs to be slid to the right on the bracket 2, and under the action of the rebound force of the second spring 12, the slider 6 will be moved upward until the roller 9 on the slider 6 contacts the inclined surface 11 on one side of the wedge block 10. The component force generated after contact will further prevent the slider 6 from sliding on the bracket 2, thereby fine-tuning the initial position of the stop block 7, compensating for the error caused by the decrease in the spring coefficient of the first spring 5 after long-term use, realizing the zeroing of the weighing system, ensuring that the overweight alarm is issued only when the goods exceed a certain weight, improving the transportation efficiency of the unmanned transport vehicle; at the same time, reducing the number of times the unmanned transport vehicle is maintained and reducing the cost of maintaining the unmanned transport vehicle.

[0028] Preferred, such as Figure 4As shown, the bracket 2 is provided with a guide rod 13 that is slidably connected to the slider 6, which guides the slider 6, further improving the stability of the overall structure and the transportation efficiency of the unmanned transport vehicle; the guide rod 13 is provided with a protrusion 14 after passing through the slider 6, and the second spring 12 is sleeved on the outside of the guide rod 13 and is provided between the protrusion 14 and the slider 6, which guides the second spring 12.

[0029] Preferred, such as Figure 3 and Figure 5 As shown, a sliding plate 15 is provided on one side of the wedge block 10 and is slidably connected to the bracket 2. A guide post 16 is provided on one side of the sliding plate 15. A turntable 17 is rotatably connected to the bracket 2. A vortex groove 18 is provided on the turntable 17 and contacts the guide post 16. By rotating the turntable 17 on the bracket 2, the vortex groove 18 further contacts the guide post 16. The component force generated after contact drives the wedge block 10 to move slightly on the bracket 2, thereby slightly adjusting the position of the stop block 7 and improving the control accuracy of the overload system.

[0030] Preferred, such as Figure 3 and Figure 6 As shown, a rotating shaft 19 connected to a turntable 17 is rotatably connected to the bracket 2. A driven wheel 20 is provided at the end of the rotating shaft 19. A rotary motor 21 is provided on the bracket 2. A drive wheel 22 is provided at the movable end of the rotary motor 21 to drive the driven wheel 20 to rotate, providing power for the turntable 17 to rotate on the bracket 2. There is no need to manually adjust the position of the stop 7, which simplifies the operation steps of adjusting the stop 7 and improves the efficiency of adjusting the stop 7.

[0031] Preferred, such as Figure 3 and Figure 6 As shown, the driven wheel 20 is provided with several limiting grooves 23, and a shift groove 24 is provided between two adjacent limiting grooves 23. The left and right sides of the drive wheel 22 are provided with limiting blocks 25, and the upper and lower sides of the drive wheel 22 are provided with shift blocks 26. The limiting blocks 25 contact the limiting grooves 23 and restrict the driven wheel 20 from rotating on the bracket 2, so as to prevent external forces from unintentionally changing the position of the stop block 7, thereby ensuring that an alarm is issued in time when the goods are overweight, and thus improving the transportation efficiency of the unmanned transport vehicle. The shift blocks 26 contact the shift grooves 24 and drive the driven wheel 20 to rotate on the bracket 2, thereby adjusting the initial position of the stop block 7, compensating for the error caused by the decrease in the spring coefficient of the first spring 5 after long-term use, and thus improving the transportation efficiency of the unmanned transport vehicle.

[0032] Preferred, such as Figure 1 and Figure 2As shown, the base frame 1 is equipped with a damper 27 that contacts the bracket 2. Specifically, the damper 27 is a hydraulic damper of DAMPTAC DT. The rebound force generated after the damper 27 is compressed will limit the bracket 2 from moving further down, thereby preventing the bracket 2 from moving up and down frequently on the base frame 1, which would cause the overall structure to be in an unstable state. This further improves the stability of the bracket 2 sliding on the base frame 1, thereby preventing the goods from falling off and improving the transportation efficiency of the unmanned transport vehicle.

[0033] Example 1

[0034] This utility model provides an unmanned transport vehicle with an overload warning structure, such as... Figures 1-3 As shown, when the goods are placed on the bracket 2, the weight of the goods acts on the bracket 2, and the force generated causes the bracket 2 to slide on the base frame 1. It is slidably connected to the sliding sleeve 3 through the sliding rod 4, which guides the sliding of the bracket 2 on the base frame 1, improves the stability of the bracket 2 sliding on the base frame 1, prevents the goods from falling off, and thus improves the transportation efficiency of the unmanned transport vehicle.

[0035] In addition, during the downward movement of the bracket 2, the first spring 5 is compressed by the slide rod 4, and the rebound force generated by the compression of the first spring 5 counteracts the weight of the goods until the overall structure is in a stable state. The degree of vertical movement of the bracket 2 on the base frame 1 is changed according to the weight of the goods. In addition, the bracket 2 will drive the stop block 7 to slide on the base frame 1 together until the whole structure is stable. The stop block 7 also moves to the front end of the corresponding sensor 8. When the stop block 7 approaches the corresponding sensor 8, the dielectric constant between the stop block 7 and the electrode changes, resulting in a change in capacitance value. This determines that the weight of the goods is within a certain range and feeds back a signal to the control center. Through a pre-set program, the driving speed of the unmanned transport vehicle is adjusted to prevent the unmanned transport vehicle from going too fast and causing the goods to fall, thereby improving the transportation efficiency of the unmanned transport vehicle. At the same time, when the goods are overweight, an alarm is issued in time to prevent the forced transportation of overweight goods from causing overload of the power system, thereby improving the service life of the unmanned transport vehicle.

[0036] Example 2

[0037] Based on Example 1, such as Figures 3-6As shown, after the first spring 5 has been stretched and deformed for a long time, the microstructure inside the material will change, resulting in fatigue. This will cause the elastic performance of the first spring 5 to gradually decrease, leading to a greater deformation of the first spring 5 under the same external force. Since the weight of the bracket 2 itself has not changed, the bracket 2 will further compress the first spring 5 in the initial state, causing the stop block 7 in the initial state to move downward. At the same time, due to the decrease in the coefficient of the first spring 5, it will be easier to trigger the overload signal. At this time, the drive wheel 22 will be driven to rotate on the bracket 2 by the rotary motor 21, causing one of the limit blocks 25 to slide out of the limit groove 23, releasing the restriction on the driven wheel 20 to rotate on the bracket 2. Then, the component force generated by the contact between the lever block 26 and the lever groove 24 will drive the driven wheel 20 to rotate on the bracket 2, and through the rotating shaft 19 The torque is transmitted, causing the turntable 17 to rotate on the bracket 2, which further contacts the vortex groove 18 with the guide post 16. The component force generated after contact causes the wedge block 10 to move slightly on the bracket 2, and then slides the wedge block 10 slightly to the right. Under the action of the rebound force of the second spring 12, the slider 6 is moved upward until the roller 9 on the slider 6 contacts the inclined surface 11 on one side of the wedge block 10. The component force generated after contact will further prevent the slider 6 from sliding on the bracket 2, thereby fine-tuning the initial position of the stop block 7, compensating for the error caused by the decrease in the spring coefficient of the first spring 5 after long-term use, realizing the zeroing of the weighing system, ensuring that the overweight alarm is issued only when the goods exceed a certain weight, improving the transportation efficiency of the unmanned transport vehicle; at the same time, reducing the number of times the unmanned transport vehicle is maintained and reducing the maintenance cost of the unmanned transport vehicle;

[0038] Each time the starting position of the stop block 7 is adjusted, the limit block 25 re-engages with the limit groove 23. The resistance generated after the two come into contact restricts the driven wheel 20 from rotating on the bracket 2, preventing external forces from unintentionally changing the position of the stop block 7, thereby ensuring that an alarm is issued in time when the cargo is overweight, and thus improving the transportation efficiency of the unmanned transport vehicle.

[0039] Example 3

[0040] Based on Example 1, such as Figure 1 and Figure 2 As shown, the base frame 1 is provided with a damper 27 that contacts the bracket 2. The rebound force generated after the damper 27 is compressed will limit the bracket 2 from moving further down, thereby preventing the bracket 2 from moving up and down frequently on the base frame 1, which would cause the overall structure to be in an unstable state. This further improves the stability of the bracket 2 sliding on the base frame 1, thereby preventing the goods from falling off and improving the transportation efficiency of the unmanned transport vehicle.

Claims

1. An unmanned transport vehicle with an overweight warning structure, comprising a chassis (1) and a bracket (2) slidably mounted on the chassis (1), characterized in that: The base frame (1) is provided with several sliding sleeves (3), the bracket (2) is provided with several sliding rods (4) that are slidably connected to the sliding sleeves (3), a first spring (5) is provided between the sliding rods (4) and the sliding sleeves (3), a slider (6) is slidably connected to the base frame (1), a stop block (7) is provided at the end of the slider (6), and a number of sensors (8) that cooperate with the stop block (7) are provided on the bracket (2).

2. The unmanned transport vehicle with an overweight early warning structure according to claim 1, characterized in that: A roller (9) is rotatably connected to the slider (6), a wedge block (10) is slidably connected to the bracket (2), one side of the wedge block (10) is provided with an inclined surface (11) that rolls in contact with the roller (9), and a second spring (12) is provided between the slider (6) and the bracket (2).

3. The unmanned transport vehicle with an overweight early warning structure according to claim 2, characterized in that: The bracket (2) is provided with a guide rod (13) that is slidably connected to the slider (6). The guide rod (13) passes through the slider (6) and is provided with a protrusion (14). The second spring (12) is sleeved on the outside of the guide rod (13) and is located between the protrusion (14) and the slider (6).

4. The unmanned transport vehicle with an overweight early warning structure according to claim 2, characterized in that: The wedge block (10) has a sliding plate (15) that is slidably connected to the bracket (2) on one side. The sliding plate (15) has a guide post (16) on one side. The bracket (2) is rotatably connected to a turntable (17). The turntable (17) has a vortex groove (18) that contacts the guide post (16).

5. The unmanned transport vehicle with an overweight early warning structure according to claim 4, characterized in that: The bracket (2) is rotatably connected to a rotating shaft (19) connected to a turntable (17). The end of the rotating shaft (19) is provided with a driven wheel (20). The bracket (2) is provided with a rotary motor (21). The movable end of the rotary motor (21) is provided with a drive wheel (22) that drives the driven wheel (20) to rotate.

6. The unmanned transport vehicle with an overweight early warning structure according to claim 5, characterized in that: The driven wheel (20) is provided with a plurality of limiting grooves (23), and a chute (24) is provided between two adjacent limiting grooves (23). The driving wheel (22) is provided with limiting blocks (25) on the left and right sides, and chute blocks (26) are provided on the upper and lower sides of the driving wheel (22). The limiting blocks (25) contact the limiting grooves (23) and restrict the driven wheel (20) from rotating on the bracket (2). The chute blocks (26) contact the chute (24) and drive the driven wheel (20) to rotate on the bracket (2).

7. The unmanned transport vehicle with an overweight early warning structure according to claim 1, characterized in that: The base frame (1) is provided with a damper (27) that contacts the bracket (2).

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