Unattended automatic wagon balance capable of preventing truck from slipping backwards

Abstract

The invention relates to the technical field of wagon balances, in particular to an unattended automatic wagon balance capable of preventing a truck from slipping backwards, which comprises a wagon balance body assembly. The first laser distance measuring sensor and the second laser distance measuring sensor are used for monitoring the positions of the front pressing plate and the rear pressing plate away from the scale body shell respectively, and when a truck is normally parked, the center of gravity of the truck is centered, and the pressure of the front pressing plate and the rear pressing plate is balanced; the difference value of numerical values monitored by the first laser distance measuring sensor and the second laser distance measuring sensor is within a limit range, when the truck reversely slides, the pressure of the rear pressing plate is suddenly increased, the pressure of the front pressing plate is reduced, and therefore a height difference is generated, and the difference value of the numerical values monitored by the first laser distance measuring sensor and the second laser distance measuring sensor exceeds a rated numerical value. And when the limit value is exceeded, the two rotating rods can be driven to rotate through the meshing assembly, so that the blocking frame is driven to rotate through the rotating rotating rods, and the rear wheels of the truck are blocked through the blocking frame.

Description

Technical Field

[0001] The invention relates to the technical field of weighbridges, and in particular to an unattended automatic weighbridge capable of preventing trucks from rolling back. Background Art

[0002] Truck weighing is a critical step in cargo measurement in modern logistics, mining, ports, and other fields. Traditional weighbridges rely on manual operation, resulting in low efficiency, susceptibility to fraud, and high labor costs. With the advancement of automation technology, unmanned automatic weighbridges are becoming increasingly popular. These utilize technologies such as license plate recognition, infrared positioning, and video surveillance to automate the weighing process.

[0003] During weighing, trucks can roll back due to driver error, such as failure to apply the handbrake, improper accelerator / clutch coordination, brake system failure, or installation on a sloped or slippery surface. Rolling back not only leads to inaccurate weighing data but can also cause serious safety incidents, threatening the lives and health of workers and significantly increasing economic losses. Summary of the Invention

[0004] In order to overcome the problem that when using the existing automatic weighing scale, the truck parked on the upper end of the weighing scale will inevitably roll back due to the driver's operating error, which will threaten the life and health of the staff to a certain extent and further affect the safety of the entire automatic weighing scale.

[0005] The technical solution of the present invention is: an unattended automatic weighing scale capable of preventing a truck from rolling back, comprising a weighing body assembly, a moving assembly connected to the weighing body assembly, a positioning assembly connected to the moving assembly, a front measuring assembly connected to the positioning assembly, a middle section assembly movably connected to the front measuring assembly, a rear measuring assembly movably connected to the middle section assembly, a blocking assembly movably connected to the rear measuring assembly, and a driving assembly connected to the weighing body assembly; The front measuring assembly includes a front pressure plate connected to the positioning assembly, a plurality of adjustment slots provided on the front pressure plate, a first laser ranging sensor connected to the lower end surface of the front pressure plate, a first positioning rod connected to the front pressure plate, a first positioning piece movably connected to the first positioning rod, and a first positioning spring connected between the first positioning piece and the front pressure plate; The rear measurement assembly includes a rear pressure plate movably connected to the middle section assembly, a second laser ranging sensor connected to the lower end surface of the rear pressure plate, a second positioning rod connected to the rear pressure plate, a second positioning piece movably connected to the second positioning rod, and a second positioning spring connected between the second positioning piece and the rear pressure plate; The blocking assembly includes two combination seats connected to the pound body assembly, a rotating rod movably connected to the combination seats, a blocking frame connected to the rotating rod, a fitting groove opened on the blocking frame and an engaging assembly connected to the rotating rod.

[0006] Preferably, the meshing assembly includes a first synchronous wheel connected to the rotating rod, a synchronous belt movably connected to the first synchronous wheel, a second synchronous wheel movably connected to the synchronous belt, a meshing wheel connected to the second synchronous wheel, a first servo motor connected to one of the meshing wheels, and a motor bracket connected to the first servo motor, and the two meshing wheels are meshed.

[0007] Preferably, the scale body assembly includes a scale body shell connected to the mobile assembly, mounting slots opened at the four corners of the scale body shell, a weighing sensor connected to the scale body shell, a guide platform connected to one side of the scale body shell, and a guide plate movably connected to the other side of the scale body shell.

[0008] Preferably, the moving assembly includes a fixing bar connected to the scale body shell, a connecting rod seat connected to the fixing bar, a first electric push rod connected to the connecting rod seat, and a connecting piece connected to the first electric push rod.

[0009] Preferably, the positioning assembly includes a screw slide connected to the connecting plate, a fixed plate connected to the screw slide, a positioning guide rail movably connected to the fixed plate, a screw slide movably connected to the screw slide, and a baffle assembly connected to the screw slide, and the positioning guide rail is connected to the front pressure plate.

[0010] Preferably, the baffle assembly includes a baffle bar connected to the screw slide, a pressure sensor connected to the baffle bar, a plurality of limit rods movably connected to the baffle bar, a pressure plate connected to the limit rod, and a return spring connected between the pressure plate and the baffle bar.

[0011] Preferably, the middle section assembly includes a middle section plate connected to the pound body shell, a number of spring combination plates respectively connected to the front pressure plate and the rear pressure plate, a combination rod connected to the spring combination plate, a fixed spring connected to the combination rod, a light-emitting head connected to the inner wall of the pound body shell, and a schematic assembly connected to the middle section plate.

[0012] Preferably, the schematic assembly includes a connecting column connected to the middle section plate, a connecting plate frame connected to the connecting column, a reflective plate connected to the connecting plate frame, and a light-transmitting groove opened on the middle section plate.

[0013] Preferably, the driving assembly includes a second servo motor connected to the pound body housing, a first gear connected to the output shaft of the second servo motor, a second gear arranged at the upper end of the first gear, a mounting plate connected to the second gear, a second electric push rod connected to the mounting plate, and a back pressure assembly connected to the second electric push rod, and the second gear is movably connected to the pound body housing.

[0014] Preferably, the rear pressure assembly includes a push plate connected to the second electric push rod, a support frame connected to the push plate, a third electric push rod connected to the support frame, and a combination block connected to the third electric push rod, and the combination block is connected to the guide plate.

[0015] Beneficial effects of the present invention: 1. On the basis of conventional automatic weighing scales, the rollover detection of the weighing scale is improved. The first laser ranging sensor and the second laser ranging sensor are used to monitor the position of the front pressure plate and the rear pressure plate from the scale body shell respectively. When the truck is parked normally, the center of gravity of the vehicle is centered, the pressure of the front pressure plate and the rear pressure plate is balanced, and the difference in values ​​monitored by the first laser ranging sensor and the second laser ranging sensor is within the rated range. When the truck rolls back, the pressure of the rear pressure plate suddenly increases and the pressure of the front pressure plate decreases, thereby generating a height difference, so that the difference in values ​​monitored by the first laser ranging sensor and the second laser ranging sensor exceeds the rated value. When the rated value is exceeded, the two rotating rods can be driven to rotate by the meshing assembly, thereby driving the blocking frame to rotate by the rotating rotating rod, so as to block the rear wheels of the truck through the blocking frame, thereby preventing the truck from rolling back. 2. The screw rail and the screw slide cooperate with each other to drive the bar assembly to move in the horizontal direction, and the movable fixed plate and the positioning guide rail are used to move the bar assembly vertically. The screw rail can be adjusted for displacement, and the first electric push rod is used to drive the positioning assembly to move in the vertical direction. After use, the positioning assembly can be stored inside the scale body shell to prevent the truck from hitting the positioning assembly when leaving. 3. Light is emitted through the light-emitting head and transmitted through the light-transmitting slot, so that the light can be transmitted to the reflective board. The truck driver can sense whether the truck is parked in place by observing the light on the reflective board. Therefore, the light perception can be combined with the pressure measurement to achieve a secondary judgment on the automatic scale's slipping phenomenon, thereby greatly improving the stability of the entire automatic scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the unattended automatic weighing scale of the present invention; Figure 2Shown is a first three-dimensional structural schematic diagram of the blocking assembly of the unattended automatic weighing scale of the present invention; Figure 3 Shown is a second three-dimensional structural schematic diagram of the blocking assembly of the unattended automatic weighing scale of the present invention; Figure 4 Shown is a schematic diagram of the three-dimensional structure of the mobile component of the unattended automatic weighing scale of the present invention; Figure 5 Shown is a first three-dimensional structural schematic diagram of the positioning assembly of the unattended automatic weighing scale of the present invention; Figure 6 Shown is a second three-dimensional structural schematic diagram of the positioning assembly of the unattended automatic weighing scale of the present invention; Figure 7 Shown is a first three-dimensional structural schematic diagram of the middle section assembly of the unattended automatic weighing scale of the present invention; Figure 8 Shown is a second three-dimensional structural schematic diagram of the middle section assembly of the unattended automatic weighing scale of the present invention; Figure 9 Shown is a first three-dimensional structural schematic diagram of the driving assembly of the unattended automatic weighing scale of the present invention; Figure 10 Shown is a second three-dimensional structural schematic diagram of the driving assembly of the unattended automatic floor scale of the present invention.

[0017] Explanation of reference numerals: 1. Scale body assembly; 2. Moving assembly; 3. Positioning assembly; 4. Front measuring assembly; 5. Middle section assembly; 6. Rear measuring assembly; 7. Blocking assembly; 8. Driving assembly; 101. Scale body housing; 102. Mounting slot; 103. Weighing sensor; 104. Guide platform; 105. Guide plate; 201. Fixing bar; 202. Connecting rod seat; 203. First electric push rod; 204. Connecting piece; 30 1. Screw guide rail; 302. Fixing plate; 303. Positioning guide rail; 304. Screw slide; 305. Stop wheel strip; 306. Pressure sensor; 307. Limit rod; 308. Return spring; 309. Stop pressure plate; 401. Front pressure plate; 402. Adjustment slot; 403. First laser distance sensor; 404. First positioning rod; 405. First positioning spring; 406. First positioning plate; 501. Middle plate; 5 02, light-transmitting groove; 503, connecting column; 504, connecting plate frame; 505, reflector; 506, light-emitting head; 507, spring assembly plate; 508, assembly rod; 509, fixing spring; 601, rear pressure plate; 602, second laser ranging sensor; 603, second positioning rod; 604, second positioning spring; 605, second positioning plate; 701, assembly seat; 702, rotating rod; 703, blocking frame; 70 4. Fitting groove; 705. First synchronous wheel; 706. Synchronous belt; 707. Second synchronous wheel; 708. Meshing wheel; 709. First servo motor; 710. Motor bracket; 801. Second servo motor; 802. First gear; 803. Second gear; 804. Mounting plate; 805. Second electric push rod; 806. Pushing piece; 807. Support frame; 808. Third electric push rod; 809. Assembly block. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] An unattended automatic weighbridge that can prevent trucks from rolling back. Figures 1-10 As shown, it includes a scale body assembly 1, a moving assembly 2 connected to the scale body assembly 1, a positioning assembly 3 connected to the moving assembly 2, a front measuring assembly 4 connected to the positioning assembly 3, a middle section assembly 5 movably connected to the front measuring assembly 4, a rear measuring assembly 6 movably connected to the middle section assembly 5, a blocking assembly 7 movably connected to the rear measuring assembly 6, and a driving assembly 8 connected to the scale body assembly 1; The front measuring assembly 4 includes a front pressure plate 401 connected to the positioning assembly 3, a plurality of adjustment slots 402 provided on the front pressure plate 401, a first laser ranging sensor 403 connected to the lower end surface of the front pressure plate 401, a first positioning rod 404 connected to the front pressure plate 401, a first positioning piece 406 movably connected to the first positioning rod 404, and a first positioning spring 405 connected between the first positioning piece 406 and the front pressure plate 401; The rear measuring assembly 6 includes a rear pressure plate 601 movably connected to the middle section assembly 5, a second laser ranging sensor 602 connected to the lower end surface of the rear pressure plate 601, a second positioning rod 603 connected to the rear pressure plate 601, a second positioning piece 605 movably connected to the second positioning rod 603, and a second positioning spring 604 connected between the second positioning piece 605 and the rear pressure plate 601; The blocking assembly 7 includes two combination seats 701 connected to the pound body assembly 1, a rotating rod 702 movably connected to the combination seat 701, a blocking frame 703 connected to the rotating rod 702, a fitting groove 704 opened on the blocking frame 703 and an engaging assembly connected to the rotating rod 702.

[0020] according to Figure 2-Figure 3 As shown, the meshing assembly includes a first synchronous wheel 705 connected to the rotating rod 702, a synchronous belt 706 movably connected to the first synchronous wheel 705, a second synchronous wheel 707 movably connected to the synchronous belt 706, a meshing wheel 708 connected to the second synchronous wheel 707, a first servo motor 709 connected to one of the meshing wheels 708, and a motor bracket 710 connected to the first servo motor 709, and the two meshing wheels 708 are meshed.

[0021] according to Figure 1 As shown, the scale body assembly 1 includes a scale body shell 101 connected to the mobile assembly 2, mounting slots 102 opened at the four corners of the scale body shell 101, a weighing sensor 103 connected to the scale body shell 101, a guide platform 104 connected to one side of the scale body shell 101, and a guide plate 105 movably connected to the other side of the scale body shell 101.

[0022] according to Figure 4-Figure 5 As shown, the moving assembly 2 includes a fixing bar 201 connected to the scale body housing 101 , a connecting rod seat 202 connected to the fixing bar 201 , a first electric push rod 203 connected to the connecting rod seat 202 , and a connecting piece 204 connected to the first electric push rod 203 .

[0023] It should be noted that the first electric push rod 203 is used to drive the positioning assembly 3 to adjust its displacement in the vertical direction, so that after use, the positioning assembly 3 can be stored inside the scale body shell 101, thereby preventing the truck from hitting the positioning assembly 3 when leaving.

[0024] according to Figure 5 As shown, the positioning assembly 3 includes a screw slide 301 connected to the connecting plate 204, a fixed plate 302 connected to the screw slide 301, a positioning guide rail 303 movably connected to the fixed plate 302, a screw slide 304 movably connected to the screw slide 301, and a baffle assembly connected to the screw slide 304, and the positioning guide rail 303 is connected to the front pressure plate 401.

[0025] It should be noted that the screw rail 301 and the screw slide 304 cooperate with each other to drive the baffle assembly to move in the horizontal direction, and the screw rail 301 can be adjusted in displacement when the baffle assembly moves vertically through the movably connected fixing plate 302 and the positioning guide rail 303.

[0026] according to Figure 6 As shown, the baffle assembly includes a baffle bar 305 connected to the screw slide 304, a pressure sensor 306 connected to the baffle bar 305, a plurality of limit rods 307 movably connected to the baffle bar 305, a baffle pressure plate 309 connected to the limit rod 307, and a return spring 308 connected between the baffle pressure plate 309 and the baffle bar 305.

[0027] It should be noted that the front wheels of the truck are blocked by the wheel block bar 305, and the pressure sensor 306 is set to sense the movement of the pressure block plate 309 after it moves under pressure, and the reset spring 308 is set to achieve rapid reset of the pressure block plate 309 after it is compressed.

[0028] according to Figure 7-Figure 8 As shown, the middle section assembly 5 includes a middle section plate 501 connected to the pound body shell 101, a plurality of spring assembly plates 507 respectively connected to the front pressure plate 401 and the rear pressure plate 601, a combination rod 508 connected to the spring assembly plate 507, a fixed spring 509 connected to the combination rod 508, a light-emitting head 506 connected to the inner wall of the pound body shell 101, and a schematic assembly connected to the middle section plate 501.

[0029] according to Figure 7-Figure 8 As shown, the schematic assembly includes a connecting column 503 connected to the middle plate 501, a connecting plate frame 504 connected to the connecting column 503, a reflective plate 505 connected to the connecting plate frame 504, and a light-transmitting groove 502 opened on the middle plate 501.

[0030] It should be noted that light is emitted by the light-emitting head 506 and transmitted through the light-transmitting slot 502, so that the light can be transmitted to the reflective plate 505. The truck driver can sense whether the truck is parked in place by observing the light on the reflective plate 505. Therefore, the light perception can be combined with the pressure measurement to achieve a secondary judgment on the phenomenon of the automatic scale slipping back, thereby greatly improving the stability of the entire automatic scale.

[0031] according to Figure 9-10 As shown, the driving assembly 8 includes a second servo motor 801 connected to the pound body housing 101, a first gear 802 connected to the output shaft of the second servo motor 801, a second gear 803 arranged at the upper end of the first gear 802, a mounting plate 804 connected to the second gear 803, a second electric push rod 805 connected to the mounting plate 804, and a back pressure assembly connected to the second electric push rod 805, and the second gear 803 is movably connected to the pound body housing 101.

[0032] It should be noted that the first gear 802 is driven to rotate by the second servo motor 801, and the rotating first gear 802 drives the second gear 803 to rotate, so that the rotating second gear 803 drives the second electric push rod 805 to rotate around the central axis of the second gear 803, so that the second electric push rod 805 can drive the guide plate 105 to rotate.

[0033] according to Figure 9-10 As shown, the rear pressure assembly includes a push plate 806 connected to the second electric push rod 805, a support frame 807 connected to the push plate 806, a third electric push rod 808 connected to the support frame 807, and a combination block 809 connected to the third electric push rod 808, and the combination block 809 is connected to the guide plate 105.

[0034] It should be noted that the guide plate 105 is driven to separate from the pound body shell 101 by the second electric push rod 805, and the guide plate 105 is driven to rotate by the rotating second electric push rod 805, so that the rotated guide plate 105 can fall on the rear pressure plate 601, and the guide plate 105 is driven to move by the third electric push rod 808, so that the guide plate 105 can be abutted against the fitting groove 704 to apply a propulsion force to the blocking frame 703, thereby increasing the pressure of the entire blocking frame 703.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. An unattended automatic weighbridge capable of preventing trucks from rolling back, characterized by: The invention comprises a pound body assembly (1), a moving assembly (2) connected to the pound body assembly (1), a positioning assembly (3) connected to the moving assembly (2), a front measuring assembly (4) connected to the positioning assembly (3), a middle section assembly (5) movably connected to the front measuring assembly (4), a rear measuring assembly (6) movably connected to the middle section assembly (5), a blocking assembly (7) movably connected to the rear measuring assembly (6), and a driving assembly (8) connected to the pound body assembly (1); The front measuring assembly (4) comprises a front pressure plate (401) connected to the positioning assembly (3), a plurality of adjustment slots (402) provided on the front pressure plate (401), a first laser distance measuring sensor (403) connected to the lower end surface of the front pressure plate (401), a first positioning rod (404) connected to the front pressure plate (401), a first positioning piece (406) movably connected to the first positioning rod (404), and a first positioning spring (405) connected between the first positioning piece (406) and the front pressure plate (401); The rear measurement assembly (6) comprises a rear pressure plate (601) movably connected to the middle section assembly (5), a second laser distance measuring sensor (602) connected to the lower end surface of the rear pressure plate (601), a second positioning rod (603) connected to the rear pressure plate (601), a second positioning piece (605) movably connected to the second positioning rod (603), and a second positioning spring (604) connected between the second positioning piece (605) and the rear pressure plate (601); The blocking assembly (7) comprises two combination seats (701) connected to the pound body assembly (1), a rotating rod (702) movably connected to the combination seats (701), a blocking frame (703) connected to the rotating rod (702), a fitting groove (704) provided on the blocking frame (703), and an engaging assembly connected to the rotating rod (702).

2. The unattended automatic weighbridge capable of preventing a truck from rolling back according to claim 1, characterized in that: The meshing assembly comprises a first synchronous wheel (705) connected to a rotating rod (702), a synchronous belt (706) movably connected to the first synchronous wheel (705), a second synchronous wheel (707) movably connected to the synchronous belt (706), a meshing rotating wheel (708) connected to the second synchronous wheel (707), a first servo motor (709) connected to one of the meshing rotating wheels (708), and a motor bracket (710) connected to the first servo motor (709), wherein the two meshing rotating wheels (708) are meshed with each other.

3. The unattended automatic weighbridge capable of preventing a truck from rolling back according to claim 1, characterized in that: The scale body assembly (1) comprises a scale body housing (101) connected to the moving assembly (2), mounting slots (102) provided at four corners of the scale body housing (101), a weighing sensor (103) connected to the scale body housing (101), a guide platform (104) connected to one side of the scale body housing (101), and a guide plate (105) movably connected to the other side of the scale body housing (101).

4. The unattended automatic weighbridge capable of preventing a truck from rolling back according to claim 3, characterized in that: The moving assembly (2) comprises a fixing bar (201) connected to the pound body housing (101), a connecting rod seat (202) connected to the fixing bar (201), a first electric push rod (203) connected to the connecting rod seat (202), and a connecting piece (204) connected to the first electric push rod (203).

5. The unattended automatic weighbridge capable of preventing a truck from rolling back according to claim 4, characterized in that: The positioning assembly (3) comprises a screw guide rail (301) connected to the connecting plate (204), a fixed plate (302) connected to the screw guide rail (301), a positioning guide rail (303) movably connected to the fixed plate (302), a screw slide (304) movably connected to the screw guide rail (301), and a blocking bar assembly connected to the screw slide (304), wherein the positioning guide rail (303) is connected to the front pressure plate (401).

6. The unattended automatic weighbridge capable of preventing trucks from rolling back according to claim 5, characterized in that: The baffle assembly comprises a baffle bar (305) connected to a screw slide (304), a pressure sensor (306) connected to the baffle bar (305), a plurality of limiting rods (307) movably connected to the baffle bar (305), a pressure baffle (309) connected to the limiting rod (307), and a return spring (308) connected between the pressure baffle (309) and the baffle bar (305).

7. The unattended automatic weighbridge capable of preventing trucks from rolling back according to claim 3, characterized in that: The middle section assembly (5) comprises a middle section plate (501) connected to the pound body housing (101), a plurality of spring assembly plates (507) respectively connected to the front pressure plate (401) and the rear pressure plate (601), a combination rod (508) connected to the spring assembly plate (507), a fixing spring (509) connected to the combination rod (508), a light-emitting head (506) connected to the inner wall of the pound body housing (101), and a schematic assembly connected to the middle section plate (501).

8. The unattended automatic weighbridge capable of preventing a truck from rolling back according to claim 7, characterized in that: The schematic assembly comprises a connecting column (503) connected to the middle section plate (501), a connecting plate frame (504) connected to the connecting column (503), a reflective plate (505) connected to the connecting plate frame (504), and a light-transmitting groove (502) provided on the middle section plate (501).

9. The unattended automatic weighbridge capable of preventing trucks from rolling back according to claim 3, characterized in that: The driving assembly (8) comprises a second servo motor (801) connected to the pound body housing (101), a first gear (802) connected to the output shaft of the second servo motor (801), a second gear (803) arranged at the upper end of the first gear (802), a mounting plate (804) connected to the second gear (803), a second electric push rod (805) connected to the mounting plate (804), and a back pressure assembly connected to the second electric push rod (805), wherein the second gear (803) is movably connected to the pound body housing (101).

10. The unattended automatic weighbridge capable of preventing trucks from rolling back according to claim 9, characterized in that: The rear pressure assembly comprises a push plate (806) connected to the second electric push rod (805), a support frame (807) connected to the push plate (806), a third electric push rod (808) connected to the support frame (807), and a combination block (809) connected to the third electric push rod (808), wherein the combination block (809) is connected to the guide plate (105).

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