Novel automatic logistics trolley

Abstract

A novel automatic logistics trolley comprises an automatic logistics trolley body, a gravity sensor, a linear bearing, a height detection mechanism, a weight detection circuit and a control circuit. A fixing groove is formed in one side end of the container plate, and the gravity sensor is installed in the fixing groove. A bearing sleeve of the linear bearing is mounted at the other side end of the container plate; a bearing rod of the linear bearing is mounted on one side of the lower end of the container; the height detection mechanisms are installed at the front end and the rear end of the container respectively. And a resistor of the height detection mechanism, the weight detection circuit and the control circuit are arranged in the electric cabinet and are electrically connected. On the basis of the automatic logistics trolley body, when goods in a goods box of the vehicle are overweight or overhigh, nearby workers can be prompted through the audible device, a main power supply of the vehicle can be automatically cut off, and the automatic logistics trolley body can be normally used only after the weight and the height of the goods are reduced by subsequent workers; and the transportation safety risk caused by ultrahigh and overweight of the automatic logistics trolley body is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of ACV equipment, in particular to a new type of automatic logistics trolley. Background Art

[0002] An automatic logistics trolley, also known as an Automated Guided Vehicle (AGV for short), an automatic guided handling vehicle, an automatic guided transport vehicle, etc., has various names. An automatic logistics trolley generally loads goods at a corresponding position in an automatic or manual manner, and then automatically travels to a designated unloading location according to the route set by its internal control system (both power output terminals of the control system output power to the power input terminals of the electric drive wheels on both sides of the body of the automatic logistics trolley, and the automatic logistics trolley moves forward. One of the power output terminals of the control system outputs power to the power input terminal of the electric drive wheel on the left or right side of the body of the automatic logistics trolley, and the automatic logistics trolley turns right or left and moves forward). Finally, the goods are unloaded in an automatic or manual manner, and then it travels to the loading area to load the goods again. The above process can be continuously cycled to complete functions such as automatically transporting goods. Specifically, various sensors are installed around the body of the automatic logistics trolley to cooperate with the control system to work, ensuring driving safety and traveling along the normal path.

[0003] With the progress of industrial technology, AGV technology has also developed. For example, the authorized patent with the patent number "201721183172.2" and the patent name "AGV Trolley" in China records that "the AGV trolley of the present utility model has the advantages of strong road adaptability and good braking effect. The AGV trolley of the present utility model has the advantages of strong road adaptability and good braking effect". As can be seen from the above, although the comparative patent has achieved the invention technical effects described therein, like other technologies in this field, there are still the following problems. Specifically, the existing AGV trolleys do not have the function of detecting the weight and height, so especially when the loaded goods are too high or too heavy, there are certain safety risks (when the center of gravity is too high and unstable, especially when the road surface is uneven, there is a chance of tipping over, and when the weight is too large, there is a chance of damage due to excessive load on the motor, etc.). In summary, it is particularly necessary to provide an automatic logistics trolley that can automatically monitor whether the loaded goods are overweight and overheight. Summary of the Utility Model

[0004] In order to overcome the drawbacks of the existing automatic logistics trolley due to its structure limitations as described in the background, the present utility model provides a new type of automatic logistics trolley based on the body of the automatic logistics trolley. Under the joint action of relevant structures, when the vehicle starts loading goods, it can automatically detect the weight and height of the loaded goods. When the goods in the vehicle compartment are too high or too heavy, it can timely prompt the nearby staff and can automatically disconnect the total power supply of the vehicle. Only after reducing the weight and height of the goods can the vehicle be used normally, thereby ensuring the safe transportation of goods.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A new type of automatic logistics trolley, including an automatic logistics trolley body, a gravity sensor, and a linear bearing. It is characterized in that it also has a height detection mechanism, a weight detection circuit, and a control circuit; there is a fixed groove at one side end of the cargo box board of the automatic logistics trolley body, the gravity sensor is installed in the fixed groove and its stress surface is located at the upper end; the bearing sleeve of the linear bearing is installed at the other side end of the cargo box board, and the bearing rod of the linear bearing is installed at one side of the lower end of the cargo box of the automatic logistics trolley body; the height detection mechanism respectively includes an infrared emission module, an infrared reception module, and a resistor, and the infrared emission module and the infrared reception module are respectively installed at the front end and the rear end of the cargo box; the resistor of the height detection mechanism, the weight detection circuit, and the control circuit are installed in the electric control box, the power output end of the control circuit is electrically connected to the power input end of the control system of the automatic logistics trolley body, and one of the power output ends of the electric drive wheel of the control system is electrically connected to the power input ends of the height detection mechanism, the weight detection circuit, and the gravity sensor; the signal output end of the gravity sensor is electrically connected to the signal input end of the weight detection circuit, and the signal output ends of the weight detection circuit and the height detection mechanism are electrically connected to the signal input end of the control circuit.

[0007] Further, a buffer pad is installed at the upper end of the stress surface of the gravity sensor, and the upper end of the buffer pad is in contact with the lower end of the cargo box.

[0008] Further, the emitting head of the infrared emission module and the receiving head of the infrared reception module of the height detection mechanism are in a straight line structure.

[0009] Further, in the height detection mechanism, the output end of the infrared reception module is connected to one end of the resistor, and the power input ends of the infrared reception module and the infrared emission module are respectively electrically connected.

[0010] Further, the control circuit includes a resistor, a thyristor, a relay, and a buzzer that are electrically connected. One end of the resistor is connected to the control electrode of the thyristor, the cathode of the thyristor is connected to the positive power input end of the relay, the negative power input end of the relay is connected to the negative power input end of the buzzer, the positive power input end of the buzzer is connected to the normally open contact end of the relay, and the anode of the thyristor is connected to the control power input end of the relay.

[0011] Further, the weight detection circuit includes a variable resistor and a resistor that are electrically connected. One end of the variable resistor is connected to one end of the first resistor and one end of the second resistor.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: Based on the automatic logistics vehicle body, under the combined action of the control circuit and others, when the vehicle starts loading goods, the weight detection circuit and two sets of height detection mechanisms can automatically detect the weight and height of the loaded goods. When the goods in the vehicle cargo box are overweight or overheight, it can promptly prompt the nearby staff through a buzzer and automatically cut off the total power supply of the vehicle. Only after the subsequent staff reduces the weight and height of the goods can the automatic logistics vehicle body be used normally, thereby preventing the transportation safety risks caused by the overheight and overweight of the automatic logistics vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 、 3 It is a schematic diagram of the partial structure of the present utility model.

[0016] Figure 4 It is a circuit diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Figure 1 、 2 As shown in Figures 2, 3, and 4, a new type of automatic logistics vehicle includes an automatic logistics vehicle body 1, a gravity sensor W2, and linear bearings 3 (for guiding and fixing the up and down movement of the cargo box), and also has a height detection mechanism 4, a weight detection circuit 5, and a control circuit 6. The cargo box 101 and the cargo box board 102 of the automatic logistics vehicle body are of a split structure. There is a concave fixing groove 103 in the middle of the front end of the cargo box board 102, and the gravity sensor W2 is tightly sleeved and installed in the fixing groove 103 with its force-bearing surface located at the upper end. There is an opening on each of the left and right sides at the rear end of the cargo box board 102. The bearing sleeves 31 of the two sets of linear bearings are respectively installed in the two openings through bolts, and the upper ends of the bearing rods 32 of the two sets of linear bearings are respectively welded and installed on the left and right sides of the outer rear end of the cargo box 101. The bearing rods 32 of the two sets of linear bearings are respectively slidably sleeved in the bearing sleeves 31 of the two sets of linear bearings. There are two sets of height detection mechanisms 4. Each set of height detection mechanism respectively includes an infrared emission module W3, an infrared reception module W4, and a resistor R3. The infrared emission module W3 and the infrared reception module W4 are respectively installed on a support rod 7. The support rods 7 of the infrared emission modules W3 and the infrared reception modules W4 of the two sets of height detection mechanisms are respectively installed on the upper parts of the front end and the rear end of the left and right sides of the cargo box 101. The resistors R3 of the two sets of height detection mechanisms, the weight detection circuit 5, and the control circuit 6 are installed in the electric control box of the automatic logistics vehicle body.

[0018] Figure 1 、2 As shown in Figures 3 and 4, a buffer rubber pad 8 is adhesively bonded to the upper end of the force-receiving surface of the gravity sensor W2. The upper end of the rubber pad 8 contacts the lower front end of the cargo box 101. The height of the rubber pad 8 is slightly higher than the height of the cargo box board 102 by 2 mm (to facilitate the gravity sensor to receive force). The emitting heads of the infrared emitting modules W3 of the two sets of height detection mechanisms and the receiving heads of the infrared receiving modules W4 are respectively inclined inward. The emitting heads of the infrared emitting modules W3 at the front left end and the front right end of the cargo box 101 and the receiving heads of the infrared receiving modules W4 at the rear right end and the rear left end of the cargo box are respectively in a state of an inclined straight line structure. In each set of height detection mechanisms, the output end of the infrared receiving module W4 is connected to one end of the resistor R3. The power input terminals 1 and 2 of the infrared receiving module W4 and the infrared emitting module W3 are respectively connected by wires (only one set of height detection mechanisms is drawn in this embodiment). Figure 3 The control circuit includes a resistor R4, a thyristor VS1, a relay J2, and a buzzer B connected by circuit board wiring. One end of the resistor R4 is connected to the control electrode of the thyristor VS1. The cathode of the thyristor VS1 is connected to the positive power input terminal of the relay J2. The negative power input terminal of the relay J2 and the negative power input terminal of the buzzer B are connected. The positive power input terminal of the buzzer B is connected to the normally open contact terminal of the relay J2. The anode of the thyristor VS1 is connected to the control power input terminal of the relay J2. The weight detection circuit includes a variable resistor RP1, resistors R1 and R2 connected by circuit board wiring. One end of the variable resistor RP1 is connected to one end of the first resistor R1 and one end of the second resistor R1. Figure 4 In this embodiment, the model of the relay J2 is DC12V; the buzzer B is an active continuous sound high-decibel alarm of model HND-4216; the resistance values of the resistors R1, R2, R3, and R4 are 10K, 10K, 10K, and 4.7K respectively; the resistance value of the variable resistor RP1 is 470K (adjusted to 38K in this embodiment. The larger its resistance value, the greater the voltage division. In this way, when the goods in the cargo box are relatively heavy, the relay J2 will be energized and attracted, that is, the weight detection threshold is set relatively large; the smaller its resistance value, the smaller the voltage division. In this way, when the goods in the cargo box are relatively light, the relay J2 will be energized and attracted, that is, the weight detection threshold is set relatively small; during production, the specific weight threshold is adjusted by technical personnel according to the load requirement of the cargo box). The pressure sensor W2 is a finished product of a force-measuring load sensor of model HYMH-019. It has two power input terminals and one signal output terminal. The greater the detected weight, the higher the output voltage signal, and vice versa, the lower the output voltage signal. The model of the thyristor VS1 is MCR100-1. The infrared emitting module W3 and the infrared receiving module W4 are finished products of a small-volume infrared opposed photoelectric switch component of model E3Z-T61. When the infrared beam emitted linearly from the light-emitting surface of the infrared emitting module W3 directly irradiates the light-receiving surface of the infrared receiving module W4, the 3rd pin of the infrared receiving module W4 does not output a high level, and vice versa, it outputs a high level. Figure 4All components in this are mature industrial products, and the working principle will not be elaborated in this application.

[0019] Figure 1 and 2 As shown in 3 and 4, the storage battery G1 of the automatic logistics trolley body is connected by wires in series with an S1 power switch (the handle is outside the opening at the front end of the vehicle body) and the anode of the thyristor VS1 at the power input end of the control circuit and the negative power input end of the relay J2 respectively. The normally closed contact end of the relay J2 at the power output end of the control circuit and the positive power input end of the control system W1 of the automatic logistics trolley body (the negative power input end is directly connected to the negative pole of the storage battery G1) are connected by wires. The power output ends of the electric drive wheels at the right side end of the automatic logistics trolley body of the control system W1, pins 5 and 6, and the power input ends of the infrared receiving modules W3 of the two height detection mechanisms, pins 1 and 2, the other end of the resistor R1 at the power input end of the weight detection circuit (pin 6 at the power output end of the electric drive wheel at the right side), and the power input ends of the gravity sensor W2, pins 1 and 2, are connected by wires respectively. The signal output end, pin 3, of the gravity sensor W2 is connected by a wire to the other end of the adjustable resistor RP1 at the signal input end of the weight detection circuit. The other end of the resistor R2 at the signal output end of the weight detection circuit, the other end of the resistor R3 at the signal output ends of the two height detection mechanisms, and the other end of the resistor R4 at the signal input end of the control circuit are connected by wires.

[0020] Figure 1 and 2 As shown in 3 and 4, after the power switch S1 is turned on, the control circuit is powered on and works. The power output by the storage battery G1 enters the power input end of the control system W1 through the control power input end and the normally closed contact end of the relay J2. Based on the automatic logistics trolley body 1 of this new type, during actual operation, the goods are loaded into the cargo box 101 at the corresponding position automatically or manually, and then it automatically travels to the designated unloading location according to the route set by its internal control system W1 (the two power output ends of the control system, pins 3 and 4, and pins 5 and 6, output power to the power input ends of the electric drive wheels M1 and M2 at both sides of the automatic logistics trolley body simultaneously, and the automatic logistics trolley body 1 moves forward. One of the power output ends of the control system W1 outputs power to the power input end of the electric drive wheel M1 or M2 at the left or right side end of the automatic logistics trolley body, and the automatic logistics trolley body 1 turns right or left and moves forward), and finally unloads the goods automatically or manually. Then, it travels to the loading area again to load the goods. The above process is continuously cycled, and functions such as automatically transporting goods can be completed. Specifically, a variety of sensors TN are installed around the body of the automatic logistics trolley to cooperate with the control system to work, ensuring driving safety and traveling along the normal path. The working method of the above automatic logistics trolley body 1 is an extremely mature technology existing, and this application does not claim any protection for the working principle of the automatic logistics trolley body 1 (nor will it be elaborated further).

[0021] Figure 1 、 2As shown in Figures 3 and 4, after the automated guided vehicle has loaded the goods, when the power output terminals 5 and 6 of the electric drive wheels on the right side of the body of the automated guided vehicle of the control system W1 (including terminals 3 and 4 which will also output power) output power to the corresponding electric drive mechanism M2 on the right side of the body, the power will enter the power input terminals of two sets of height detection mechanisms, weight detection circuits, and gravity sensor W2. Through the above, when the cargo box is loaded with goods and ready to travel, the relevant circuits will be powered on to work, preventing the infrared receiving module W4 and the infrared transmitting module W4 of the height detection mechanism from being blocked by the goods during the loading process, resulting in false alarms of the control circuit. After the weight detection circuit and the gravity sensor W2 are powered on, the weight of the cargo box 101 will act on the pressure sensor W2 on one side of the front end. The heavier the goods in the cargo box 101, the greater the weight on the stress surface of the pressure sensor W2, and the relatively higher the voltage signal output by the 3rd terminal of the pressure sensor A2. Conversely, the voltage signal output by the 3rd terminal of the pressure sensor W2 is relatively low. When the weight of the goods inside the cargo box 101 does not exceed the threshold (for example, less than 100KG), the voltage signal output by the 3rd terminal of the pressure sensor W2 is relatively low. This voltage signal is divided by the adjustable resistor RP1 and the resistor R1, and the resistors R2 and R4 step down and limit the current to enter the control electrode of the thyristor VS1 below 0.8V. The thyristor VS1 will not be triggered into conduction, the relay J2 will not be powered on and attracted, the control system continues to be powered on, and the automated guided vehicle body travels normally. When the weight of the goods inside the cargo box 101 exceeds the threshold (for example, higher than 100KG), the voltage signal output by the 3rd terminal of the pressure sensor W2 is relatively high. This voltage signal is divided by the adjustable resistor RP1 and the resistor R1, and the resistors R2 and R4 step down and limit the current to enter the control electrode of the thyristor VS1 above 0.8V. The thyristor VS1 will be triggered into conduction, the relay J2 will be powered on and attracted to control the power input terminal and the normally closed contact terminal to be open, the control system will no longer continue to be powered on, and the automated guided vehicle body will no longer travel. After the two sets of height detection mechanisms are powered on to work, the infrared light beams emitted by the emission surfaces of the two sets of infrared transmitting modules W3 (the heights of the two sets of infrared transmitting modules W3 differ by 5 millimeters) cross and respectively irradiate on the receiving surfaces of the two sets of infrared receiving modules W4 (the heights of the two sets of infrared receiving modules W4 differ by 5 millimeters). In this way, the 3rd terminals of the two sets of infrared receiving modules W4 do not output a high level, the thyristor VS1 will not be triggered into conduction, the relay J2 will not be powered on and attracted, the control system continues to be powered on, and the automated guided vehicle body travels normally. When the infrared light beam emitted by the emission surface of any set of infrared transmitting modules W3 is blocked by the overly high goods and no longer irradiates on the receiving surface of the corresponding set of infrared receiving modules W4, in this way, the 3rd terminal of the corresponding set or both sets of infrared receiving modules W4 outputs a high level. The high level is stepped down and current-limited by the resistors R3 and R4 and enters the control electrode of the thyristor VS1. The thyristor VS1 will be triggered into conduction, the relay J2 will be powered on and attracted to control the power input terminal and the normally closed contact terminal to be open, the control system will no longer continue to be powered on, and the automated guided vehicle body will no longer travel.

[0022] Figure 1 and 2 As shown in Figures 3 and 4, when the automatic logistics trolley body 1 is overweight or overheight, the thyristor VS1 is triggered and turned on. After the relay J2 is energized and attracted, its control power input terminal and normally open contact terminal are closed, and the control power input terminal and normally closed contact terminal are open. Then, the buzzer B is energized to emit a loud warning sound to alert the relevant personnel nearby; after the relay J2 (higher than the upper height of the cargo box) is energized and attracted and the control power input terminal and normally closed contact terminal are open, the control system W1 will lose power and the automatic logistics trolley body 1 will no longer move. Through the above, when the new vehicle starts to move forward after loading, it can automatically detect the weight and height of the goods in the device. When the goods in the vehicle cargo box are overweight or overheight, it can promptly alert the staff nearby through the buzzer, and can automatically cut off the total power supply of the vehicle. Only after the subsequent staff reduces the weight and height of the goods can the automatic logistics trolley body be used normally (after turning off the power switch S1, removing the overweight and overheight part of the goods, and then turning on the power switch S1 again, the automatic logistics trolley body can be used normally). Thus, it prevents the transportation safety risks caused by the automatic logistics trolley body being overheight and overweight.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0024] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A new type of automatic logistics cart, comprising an automatic logistics cart body, a gravity sensor, and a linear bearing, characterized in that, It also has a height detection mechanism, a weight detection circuit, and a control circuit; there is a fixed groove at one side end of the cargo box board of the automatic logistics cart body, the gravity sensor is installed in the fixed groove and its force-bearing surface is located at the upper end; the bearing sleeve of the linear bearing is installed at the other side end of the cargo box board, and the bearing rod of the linear bearing is installed at one side of the lower end of the cargo box of the automatic logistics cart body; the height detection mechanism respectively includes an infrared emission module, an infrared reception module, and a resistor, and the infrared emission module and the infrared reception module are respectively installed on the front end and the rear end of the cargo box; the resistor of the height detection mechanism, the weight detection circuit, and the control circuit are installed in the electric control box, the power output end of the control circuit is electrically connected to the power input end of the control system of the automatic logistics cart body, and one of the power output ends of the electric drive wheels of the control system is electrically connected to the power input ends of the height detection mechanism, the weight detection circuit, and the gravity sensor; the signal output end of the gravity sensor is electrically connected to the signal input end of the weight detection circuit, and the signal output ends of the weight detection circuit and the height detection mechanism are electrically connected to the signal input end of the control circuit.

2. The novel automatic logistics trolley according to claim 1, characterized in that, A buffer pad is installed on the upper end of the force-bearing surface of the gravity sensor, and the upper end of the buffer pad contacts the lower end of the cargo box.

3. A novel automatic logistics trolley according to claim 1, characterized in that, The emission head of the infrared emission module and the receiving head of the infrared reception module of the height detection mechanism are in a straight line structure.

4. A novel automatic logistics trolley according to claim 1, characterized in that, In the height detection mechanism, the output end of the infrared reception module is connected to one end of the resistor, and the power input ends of the infrared reception module and the infrared emission module are respectively electrically connected.

5. A novel automatic logistics trolley according to claim 1, characterized in that, The control circuit includes a resistor, a thyristor, a relay, and a buzzer that are electrically connected. One end of the resistor is connected to the control electrode of the thyristor, the cathode of the thyristor is connected to the positive power input end of the relay, the negative power input end of the relay is connected to the negative power input end of the buzzer, the positive power input end of the buzzer is connected to the normally open contact end of the relay, and the anode of the thyristor is connected to the control power input end of the relay.

6. The novel automatic logistics trolley according to claim 1, characterized in that, The weight detection circuit includes a variable resistor and a resistor that are electrically connected. One end of the variable resistor is connected to one end of the first resistor and one end of the second resistor.

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