Tray locking mechanism for sorting vehicle

Abstract

The invention relates to the technical field of picking vehicles, in particular to a tray locking mechanism for a picking vehicle, which comprises a bearing table fixedly mounted on the picking vehicle, two groups of clamping seats are mounted on the bearing table, abutting units are mounted on the surfaces, not in contact with a tray, of the clamping seats, and the abutting units are used for supporting the inner wall of the tray. The abutting unit comprises a first supporting rod, a second supporting rod, a third supporting rod and a fourth supporting rod which are rotatably installed on the side face of the clamping base, the first supporting rod and the second supporting rod are in power connection with a first hydraulic driving rod, and the first hydraulic driving rod is used for driving the first supporting rod and the second supporting rod to rotate from the opposite angles of the clamping base correspondingly. And the second hydraulic driving rod is used for driving the third supporting rod and the fourth supporting rod to abut against the upper inner wall and the lower inner wall of the inner cavity of the tray from the opposite angles of the clamping base correspondingly, and the second hydraulic driving rod is used for driving the third supporting rod and the fourth supporting rod to abut against the upper inner wall and the lower inner wall of the inner cavity of the tray from the opposite angles of the clamping base. The top wall and the bottom wall of the inner wall of the tray can abut against each other, the supporting plate in the tray can be clamped, and locking is more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of order picking vehicles, and in particular to a pallet locking mechanism for order picking vehicles. Background Art

[0002] A picking vehicle is a material handling device used in warehouses, logistics centers, and other places. A picking vehicle is usually composed of a vehicle body, a lifting device, an operating platform, and other parts. The operator stands on the operating platform and controls the device to move the vehicle body to the cargo storage location. Then, the lifting device is used to lift the operating platform to a suitable height, and the cargo is picked onto the pallet. When the pallet is full of cargo, the pallet is replaced for picking the next batch.

[0003] As can be seen from the above, replacing the pallet requires the picking vehicle to be able to quickly lock and release the pallet. The Chinese invention patent with application number 202311086560.9 provides a pallet clamping and releasing device for a picking vehicle. The release mechanism of the clamping device is realized by directly connecting the clamping device or transitionally connecting the clamping device through multiple pulleys. Since the clamping device can be clamped according to the pallet, the release device connection must be a soft connection. This solution uses a wire rope connection to achieve clamping and releasing of the pallet.

[0004] However, the applicant has found that the prior art has at least the following problems:

[0005] The clamping device and the support plate of the pallet are locked by two clamping plates, but the locking effect is not stable enough. When the weight of the goods on the pallet is heavy, it may cause the pallet and the clamping device to slip, causing the goods to fall. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a pallet locking mechanism for a picking vehicle to solve the problem that the locking effect between the clamping device and the pallet is not stable enough.

[0007] Based on the above-mentioned purpose, the present invention provides a pallet locking mechanism for a picking vehicle, comprising a load-bearing platform fixedly installed on the picking vehicle, two groups of clamping rods that can be clamped and released with each other are installed on the load-bearing platform, a clamping seat is installed on the clamping rod, and a supporting unit is installed on the surface of the clamping seat that does not contact the pallet, and the supporting unit is used to support the inner wall of the pallet. The supporting unit comprises a first support rod, a second support rod, a third support rod and a fourth support rod rotatably installed on the side of the clamping seat, the first support rod is coaxially connected to the first gear, the second support rod is coaxially connected to the second gear, the first gear is meshed with the second gear and is connected to the first gear folding plate, and the first gear The wheel folding plate is power-connected to a first hydraulic drive rod, which is used to provide power to the first gear folding plate, driving the first support rod and the second support rod to respectively support the upper inner wall and the lower inner wall of the pallet inner cavity from the diagonals of the clamping seat, the third support rod is coaxially connected to the third gear, the fourth support rod is coaxially connected to the fourth gear, the third gear and the fourth gear are meshingly connected to the second gear folding plate, the second gear folding plate is power-connected to a second hydraulic drive rod, the second hydraulic drive rod is used to provide power to the second gear folding plate, driving the third support rod and the fourth support rod to respectively support the upper inner wall and the lower inner wall of the pallet inner cavity from the diagonals of the clamping seat.

[0008] Optionally, the first support rod, the second support rod, the third support rod and the fourth support rod are respectively arranged on the four corners of the clamping seat, wherein the first support rod and the second support rod are respectively located at the upper and lower diagonals, and the third support rod and the fourth support rod are respectively located at the upper and lower diagonals, and a guide sleeve is installed on the clamping seat, and the guide sleeve is used to guide the first gear folding plate and the second gear folding plate. Two groups of first mounting sleeves and second mounting sleeves are also provided on the clamping seat, and the two groups of first mounting sleeves respectively guide the two ends of the first gear folding plate, and the two groups of second mounting sleeves respectively guide the two ends of the second gear folding plate.

[0009] Optionally, a guide plate is installed on the inner wall of the clamping seat, a guide groove adapted to the guide plate is opened on the clamping rod, and a power component is connected between the clamping seat and the clamping rod for changing the distance between the clamping seat and the clamping rod.

[0010] Optionally, a first hydraulic chamber and a second hydraulic chamber are respectively provided inside the clamping rod, the first hydraulic chamber is dynamically connected to the first hydraulic driving rod, and the second hydraulic chamber is dynamically connected to the second hydraulic driving rod. A first piston plate is adapted to be installed inside the first hydraulic chamber, the first piston plate is connected to a first hydraulic push rod, the first hydraulic push rod is fixedly connected to the bottom wall of the clamping seat, a second piston plate is adapted to be installed inside the second hydraulic chamber, the second piston plate is connected to a second hydraulic push rod, the second hydraulic push rod is fixedly connected to the bottom wall of the clamping seat, the first hydraulic chamber is connected to a first oil circuit, the second hydraulic chamber is connected to a second oil circuit, a balancing chamber is connected between the first oil circuit and the second oil circuit, a first movable plug and a second movable plug are installed in the balancing chamber, the first movable plug and the second movable plug are elastically connected, the first movable plug is close to the first oil circuit, and the second movable plug is close to the second oil circuit, a rangefinder is installed in the middle of the balancing chamber for monitoring the movement of the first movable plug and the second movable plug, and when the distance between the first movable plug and the second movable plug is lower than a set threshold, it is determined that the gravity on the pallet is too large and an alarm is triggered.

[0011] Optionally, a balancing piston is installed between the first movable plug and the second movable plug, a first elastic rod is installed between the balancing piston and the first movable plug, a second elastic rod is installed between the balancing piston and the second movable plug, an adjustment oil circuit is connected to the middle of the balancing chamber, and the balancing piston blocks the adjustment oil circuit in an initial state. A detector is provided on the adjustment oil circuit. In order to detect whether the adjustment oil circuit is connected to the balancing chamber, a first pressure gauge is installed in the first hydraulic chamber, a second pressure gauge is installed in the second hydraulic chamber, and an alarm and a reset button are installed on the support platform.

[0012] Optionally, a accommodating cavity is opened inside the supporting platform, a screw seat is installed in the accommodating cavity, a bidirectional screw is installed in the screw seat, the bidirectional screw is powered by a screw motor, two sets of screw sliders are adapted to be installed on the bidirectional screw, and the screw slider is fixedly connected to the clamping rod.

[0013] Optionally, an infrared detector is installed on a side of the support platform facing the clamping seat, the infrared detector is used to monitor the distance between the tray and the support platform, and the infrared detector is electrically connected to the screw motor.

[0014] Optionally, anti-slip grooves are provided on the opposite surfaces of the two groups of clamping seats.

[0015] Optionally, a distance sensor is installed on the clamping seat, and the distance sensor is used to detect the distance between the clamping seat and the upper and lower top walls of the tray. An electric lifting rod is installed on the bearing platform to adjust the height of the bearing platform.

[0016] Optionally, the clamping mount is arranged on a clamping rod.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a pallet locking mechanism for a picking vehicle. When clamping the pallet, two groups of clamping seats are inserted into the inner cavity of the pallet and are respectively on both sides of the pallet support plate, and then the two groups of clamping rods are driven to move toward each other to clamp the support plate of the pallet. In this process, the first gear folding plate is driven to move by the first hydraulic driving rod, and the first gear folding plate is meshed with the first gear and the second gear for transmission, so that the first support rod and the second support rod located at the upper and lower diagonals of the clamping seat are rotated and conflicted with the upper and lower inner walls of the pallet. At the same time, the second hydraulic driving rod drives the second gear folding plate to move, and the second gear folding plate is meshed with the third gear and the fourth gear for transmission, so that the third support rod and the fourth support rod located at the upper and lower diagonals of the clamping seat are rotated and conflicted with the upper and lower inner walls of the pallet, thereby achieving the top wall and the bottom wall of the inner wall of the pallet being clamped, the internal support plate of the pallet is clamped, the pallet is locked from multiple dimensions, the locking is more reliable, and the risk of sliding between the pallet and the locking mechanism due to the heavy weight of the goods on the pallet is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a pallet locking mechanism for a picking vehicle according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the working state of a pallet locking mechanism for a picking vehicle according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the cooperation between a pallet locking mechanism and a pallet for a picking vehicle according to an embodiment of the present invention;

[0022] Figure 4 for Figure 3 A partial cross-sectional view of Figure 1 ;

[0023] Figure 5 for Figure 3 A partial cross-sectional view of Figure 2 ;

[0024] Figure 6 It is a schematic diagram of a clamping seat of a pallet locking mechanism for a picking vehicle according to an embodiment of the present invention;

[0025] Figure 7 It is an exploded schematic diagram of a holding unit of a pallet locking mechanism for a picking vehicle according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of a clamping seat of a pallet locking mechanism for a picking vehicle according to an embodiment of the present invention;

[0027] Fig. 9 This is a schematic diagram of the internal structure of a clamping seat of a pallet locking mechanism for a picking vehicle in a working state according to an embodiment of the present invention;

[0028] Fig.10 for Fig. 9 A schematic diagram of the enlarged local structure of part A.

[0029] The markings in the figure are:

[0030] 101, bearing platform; 102, accommodating cavity; 103, screw seat; 104, bidirectional screw; 105, screw slider; 106, screw motor; 201, clamping rod; 202, clamping seat; 203, guide plate; 301, abutment unit; 302, guide sleeve; 303, first support rod; 3031, first gear; 304, second support rod; 3041, second gear; 305, third support rod; 3051, third gear; 306, fourth support rod; 3061, fourth gear; 307, first gear folding plate; 308, second gear folding plate Plate; 309, first hydraulic drive rod; 310, second hydraulic drive rod; 311, first mounting sleeve; 312, second mounting sleeve; 401, first hydraulic chamber; 402, first hydraulic push rod; 403, first piston plate; 404, first oil circuit; 405, second hydraulic chamber; 406, second hydraulic push rod; 407, second piston plate; 408, second oil circuit; 409, balance chamber; 410, first movable plug; 411, second movable plug; 412, balance piston; 413, first elastic rod; 414, second elastic rod; 415, adjustment oil circuit. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] It can be seen from the prior art that the existing picking vehicles often use pallets that are hollow in the middle and are provided with a support plate. The picking vehicles lock and release the pallets through a pallet locking mechanism to achieve pallet replacement.

[0034] like Figures 1 to 10 As shown, a specific embodiment of the present invention provides a pallet locking mechanism for a picking vehicle, comprising a load-bearing platform 101 fixedly mounted on the picking vehicle, two sets of clamping rods 201 that can be clamped and released mutually are mounted on the load-bearing platform 101, a clamping seat 202 is mounted on the clamping rod 201, and a supporting unit 301 is mounted on the surface of the clamping seat 202 that does not contact the pallet, and the supporting unit 301 is used to support the inner wall of the pallet;

[0035] The abutting unit 301 includes a first support rod 303, a second support rod 304, a third support rod 305 and a fourth support rod 306 rotatably mounted on the side of the clamping seat 202, the first support rod 303 is coaxially connected to a first gear 3031, the second support rod 304 is coaxially connected to a second gear 3041, the first gear 3031 and the second gear 3041 are meshed and connected to a first gear folding plate 307, the first gear folding plate 307 is dynamically connected to a first hydraulic driving rod 309, the first hydraulic driving rod 309 is used to provide power to the first gear folding plate 307, drive the first support rod 303 and the second support rod 304 to mesh with each other, and the first gear folding plate 307 is meshed with each other. The third support rod 305 is coaxially connected with the third gear 3051, and the fourth support rod 306 is coaxially connected with the fourth gear 3061. The third gear 3051 and the fourth gear 3061 are meshed and connected with the second gear folding plate 308. The second gear folding plate 308 is dynamically connected with the second hydraulic driving rod 310. The second hydraulic driving rod 310 is used to provide power to the second gear folding plate 308, so as to drive the third support rod 305 and the fourth support rod 306 to respectively support the upper inner wall and the lower inner wall of the inner cavity of the pallet from the diagonal angles of the clamping seat 202.

[0036] When clamping the pallet, the two groups of clamping seats 202 are inserted into the inner cavity of the pallet and are respectively on both sides of the pallet support plate, and then the two groups of clamping rods 201 are driven to move toward each other to clamp the support plate of the pallet. In this process, the first gear folding plate 307 is driven to move by the first hydraulic drive rod 309, and the first gear folding plate 307 is meshed with the first gear 3031 and the second gear 3041 for transmission, so that the first support rod 303 and the second support rod 304 located at the upper and lower diagonals of the clamping seat 202 are rotated to conflict with the upper and lower inner walls of the pallet. At the same time, the second hydraulic drive rod 310 drives the second gear folding plate 308 to move, and the second gear folding plate 308 meshes with the third gear 3051 and the fourth gear 3061 for transmission, so that the third support rod 305 and the fourth support rod 306 located at the upper and lower diagonals of the clamping seat 202 rotate and come into contact with the upper and lower inner walls of the pallet, thereby achieving tightening of the top and bottom walls of the inner wall of the pallet, clamping the internal support plate of the pallet, locking the pallet from multiple dimensions, making the locking more reliable, and reducing the risk of sliding between the pallet and the locking mechanism due to the heavy weight of the goods on the pallet.

[0037] In some optional specific embodiments, such as Figure 6 and Figure 7As shown, the first support rod 303, the second support rod 304, the third support rod 305 and the fourth support rod 306 are respectively arranged at the four corners of the clamping seat 202, wherein the first support rod 303 and the second support rod 304 are respectively located at the upper and lower diagonals, and the third support rod 305 and the fourth support rod 306 are respectively located at the upper and lower diagonals. The clamping seat 202 is provided with a guide sleeve 302, which is used to guide the first gear folding plate 307 and the second gear folding plate 308. The clamping seat 202 is also provided with two groups of first mounting sleeves 311 and second mounting sleeves 312, the two groups of first mounting sleeves 311 guide the two ends of the first gear folding plate 307 respectively, and the two groups of second mounting sleeves 312 guide the two ends of the second gear folding plate 308 respectively. When in use, the first gear folding plate 307 and the second gear folding plate 308 are guided and fixed by the guide sleeve 302, the first mounting sleeve 311 and the second mounting sleeve 312, so that the device runs more stably.

[0038] In some optional specific embodiments, such as Figures 1 to 10 As shown, a guide plate 203 is installed on the inner wall of the clamping seat 202, a guide groove adapted to the guide plate 203 is provided on the clamping rod 201, and a power assembly is connected between the clamping seat 202 and the clamping rod 201 to change the distance between the clamping seat 202 and the clamping rod 201. The clamping seat 202 and the clamping rod 201 are movably connected to adjust the height of the clamping seat 202.

[0039] In some optional specific embodiments, such as Figures 1 to 10As shown, the clamping rod 201 is provided with a first hydraulic chamber 401 and a second hydraulic chamber 405, respectively. The first hydraulic chamber 401 is connected to the first hydraulic drive rod 309 by power, and the second hydraulic chamber 405 is connected to the second hydraulic drive rod 310 by power. The first hydraulic chamber 401 is adapted to be installed with a first piston plate 403, and the first piston plate 403 is connected to a first hydraulic push rod 402, and the first hydraulic push rod 402 is fixedly connected to the bottom wall of the clamping seat 202. The second hydraulic chamber 405 is adapted to be installed with a second piston plate 407, and the second piston plate 407 is connected to a second hydraulic push rod 406, and the second hydraulic push rod 406 is fixedly connected to the bottom wall of the clamping seat 202. 01 is connected to the first oil circuit 404, the second hydraulic chamber 405 is connected to the second oil circuit 408, a balancing chamber 409 is connected between the first oil circuit 404 and the second oil circuit 408, a first movable plug 410 and a second movable plug 411 are installed in the balancing chamber 409, the first movable plug 410 and the second movable plug 411 are elastically connected, the first movable plug 410 is close to the first oil circuit 404, and the second movable plug 411 is close to the second oil circuit 408, a rangefinder is installed in the middle of the balancing chamber 409, which is used to monitor the movement of the first movable plug 410 and the second movable plug 411, and when the distance between the first movable plug 410 and the second movable plug 411 is lower than the set threshold, it is determined that the gravity on the pallet is too large and an alarm is issued. When in use, since the clamping seat 202 is wrapped around the outside of the clamping rod 201, the weight of the pallet and the cargo acts on the clamping seat 202, and the clamping seat 202 applies gravity to the first hydraulic push rod 402 and the second hydraulic push rod 406. The first piston plate 403 squeezes the first hydraulic chamber 401, and then squeezes the first hydraulic drive rod 309. The second piston plate 407 squeezes the second hydraulic chamber 405, and then squeezes the second hydraulic drive rod 310, thereby increasing the supporting force of the first support rod 303, the second support rod 304, the third support rod 305 and the fourth support rod 306. The greater the weight of the pallet and the cargo, the greater the pressure in the first hydraulic chamber 401 and the second hydraulic chamber 405, and the first movable plug 410 and the second movable plug 411 move toward each other. When the distance between the first movable plug 410 and the second movable plug 411 is lower than the set threshold, it is determined that the gravity on the pallet is too large and an alarm is issued to avoid excessive gravity and safety risks.

[0040] In some optional specific embodiments, such as Figures 8 to 10As shown, a balancing piston 412 is installed between the first movable plug 410 and the second movable plug 411, a first elastic rod 413 is installed between the balancing piston 412 and the first movable plug 410, a second elastic rod 414 is installed between the balancing piston 412 and the second movable plug 411, an adjusting oil circuit 415 is connected to the middle of the balancing chamber 409, the balancing piston 412 blocks the adjusting oil circuit 415 in the initial state, a detector is provided on the adjusting oil circuit 415, in order to detect whether the adjusting oil circuit 415 is connected to the balancing chamber 409, a first pressure gauge is installed in the first hydraulic chamber 401, a second pressure gauge is installed in the second hydraulic chamber 405, and an alarm and a reset button are installed on the support platform 101. During use, when the weight of the goods on the pallet is unevenly distributed, causing the pallet to tilt, the pressure in the first hydraulic chamber 401 or the second hydraulic chamber 405 will increase. Taking the increase in pressure in the first hydraulic chamber 401 as an example, the first movable plug 410 moves under the action of pressure and drives the balancing piston 412 to move until the balancing piston 412 moves out of the adjustment oil circuit 415. At this time, the detector detects that the adjustment oil circuit 415 is connected to the balancing chamber 409, and an alarm is issued to remind the staff to adjust the distribution of the goods. At the same time, the adjustment oil circuit 415 pumps oil between the first movable plug 410 and the balancing piston 412 until the pressure of the first pressure gauge no longer changes, thereby resetting the first movable plug 410, thereby increasing the supporting force of the first support rod 303 and the second support rod 304 linked thereto. When the staff completes the adjustment of the distribution of the goods, they press the reset button, and the adjustment oil circuit 415 pumps out the oil in the balancing chamber 409 to reset the inside of the balancing chamber 409.

[0041] In some optional specific embodiments, such as Figures 1 to 5 As shown, the support platform 101 is provided with an accommodating cavity 102 inside, a screw seat 103 is installed in the accommodating cavity 102, a bidirectional screw 104 is installed in the screw seat 103, the bidirectional screw 104 is connected to a screw motor 106 for power, two sets of screw sliders 105 are adapted to be installed on the bidirectional screw 104, and the screw slider 105 is fixedly connected to the clamping rod 201.

[0042] In some optional specific embodiments, such as Figures 1 to 5 As shown, an infrared detector is installed on the side of the carrier 101 facing the clamping seat 202, and the infrared detector is used to monitor the distance between the tray and the carrier 101. The infrared detector is electrically connected to the screw motor 106. When the tray reaches a certain distance from the carrier 101, the screw motor 106 drives the two sets of clamping seats 202 to clamp.

[0043] In some optional specific embodiments, anti-skid patterns are provided on the opposing surfaces of the two groups of clamping seats 202 to improve the anti-skid performance.

[0044] In some optional specific embodiments, a distance sensor is installed on the clamping seat 202, and the distance sensor is used to detect the distance between the clamping seat 202 and the upper and lower top walls of the tray. An electric lifting rod is installed on the supporting platform 101 to adjust the height of the supporting platform 101.

[0045] In some optional specific embodiments, the clamping seat 202 is mounted on the clamping rod 201 .

[0046] The working principle of the present invention is as follows: when clamping the pallet, two groups of clamping seats 202 are inserted into the inner cavity of the pallet and are respectively on both sides of the pallet support plate, and then the two groups of clamping rods 201 are driven to move toward each other to clamp the support plate of the pallet. In this process, the first gear folding plate 307 is driven to move by the first hydraulic drive rod 309, and the first gear folding plate 307 is meshed with the first gear 3031 and the second gear 3041 for transmission, so that the first support rod 303 and the second support rod 304 located at the upper and lower diagonals of the clamping seat 202 are rotated to engage with the upper and lower inner walls of the pallet. The second gear folding plate 308 meshes with the third gear 3051 and the fourth gear 3061 for transmission, thereby causing the third support rod 305 and the fourth support rod 306 located at the upper and lower diagonals of the clamping seat 202 to rotate and come into conflict with the upper and lower inner walls of the pallet, thereby achieving a tightening of the top and bottom walls of the inner wall of the pallet, clamping the internal support plate of the pallet, locking the pallet from multiple dimensions, making the locking more reliable, and reducing the risk of sliding between the pallet and the locking mechanism due to the heavy weight of the goods on the pallet.

[0047] When the weight of the goods on the pallet is unevenly distributed, causing the pallet to tilt, the pressure in the first hydraulic chamber 401 or the second hydraulic chamber 405 will increase. Taking the increase in pressure in the first hydraulic chamber 401 as an example, the first movable plug 410 moves under the action of pressure and drives the balancing piston 412 to move until the balancing piston 412 moves out of the adjustment oil circuit 415. At this time, the detector detects that the adjustment oil circuit 415 is connected to the balancing chamber 409, and an alarm is issued to remind the staff to adjust the distribution of the goods. At the same time, the adjustment oil circuit 415 pumps oil between the first movable plug 410 and the balancing piston 412 until the pressure of the first pressure gauge no longer changes, thereby resetting the first movable plug 410, thereby increasing the supporting force of the first support rod 303 and the second support rod 304 linked thereto. When the staff completes the adjustment of the distribution of the goods, they press the reset button, and the adjustment oil circuit 415 pumps the oil in the balancing chamber 409 out to reset the inside of the balancing chamber 409.

[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0049] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pallet locking mechanism for a picking vehicle, comprising a bearing platform (101) fixedly mounted on the picking vehicle, two sets of clamping rods (201) that can be clamped and released with each other are mounted on the bearing platform (101), a clamping seat (202) is mounted on the clamping rod (201), a supporting unit (301) is mounted on the surface of the clamping seat (202) that does not contact the pallet, and the supporting unit (301) is used to support the inner wall of the pallet, characterized in that: The abutting unit (301) comprises a first support rod (303), a second support rod (304), a third support rod (305) and a fourth support rod (306) which are rotatably mounted on the side of the clamping seat (202); the first support rod (303) is coaxially connected to a first gear (3031); the second support rod (304) is coaxially connected to a second gear (3041); the first gear (3031) and the second gear (3041) are meshedly connected to a first gear folding plate (307); the first gear folding plate (307) is dynamically connected to a first hydraulic driving rod (309); the first hydraulic driving rod (309) is used to provide power to the first gear folding plate (307) to drive the first support rod (303) and the second support rod (3041) to mesh with each other. (304) respectively support the upper inner wall and the lower inner wall of the tray cavity from the diagonal angle of the clamping seat (202), the third support rod (305) is coaxially connected to the third gear (3051), the fourth support rod (306) is coaxially connected to the fourth gear (3061), the third gear (3051) and the fourth gear (3061) are meshingly connected to the second gear folding plate (308), the second gear folding plate (308) is power-connected to the second hydraulic drive rod (310), the second hydraulic drive rod (310) is used to provide power to the second gear folding plate (308), drive the third support rod (305) and the fourth support rod (306) respectively from the diagonal angle of the clamping seat (202), to support the upper inner wall and the lower inner wall of the tray cavity.

2. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: The first support rod (303), the second support rod (304), the third support rod (305) and the fourth support rod (306) are respectively arranged on the four corners of the clamping seat (202), wherein the first support rod (303) and the second support rod (304) are respectively located at the upper and lower diagonals, and the third support rod (305) and the fourth support rod (306) are respectively located at the upper and lower diagonals. A guide sleeve (302) is installed on the clamping seat (202), and the guide sleeve (302) is used to guide the first gear folding plate (307) and the second gear folding plate (308). The clamping seat (202) is also provided with two groups of first mounting sleeves (311) and second mounting sleeves (312), and the two groups of first mounting sleeves (311) respectively guide the two ends of the first gear folding plate (307), and the two groups of second mounting sleeves (312) respectively guide the two ends of the second gear folding plate (308).

3. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: A guide plate (203) is installed on the inner wall of the clamping seat (202), a guide groove matched with the guide plate (203) is opened on the clamping rod (201), and a power component is connected between the clamping seat (202) and the clamping rod (201) for changing the distance between the clamping seat (202) and the clamping rod (201).

4. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: The clamping rod (201) is provided with a first hydraulic chamber (401) and a second hydraulic chamber (405) respectively. The first hydraulic chamber (401) is connected to the first hydraulic drive rod (309) by power, and the second hydraulic chamber (405) is connected to the second hydraulic drive rod (310) by power. The first hydraulic chamber (401) is equipped with a first piston plate (403). The first piston plate (403) is connected to a first hydraulic push rod (402). The first hydraulic push rod (402) is fixedly connected to the bottom wall of the clamping seat (202). The second hydraulic chamber (405) is equipped with a second piston plate (407). The second piston plate (407) is connected to a second hydraulic push rod (406). The second hydraulic push rod (406) is fixedly connected to the bottom wall of the clamping seat (202). The first hydraulic chamber (401) is equipped with a second piston plate (407). The second piston plate (407) is connected to a second hydraulic push rod (406). The second hydraulic push rod (406) is fixedly connected to the bottom wall of the clamping seat (202). A first oil circuit (404) is connected, and the second hydraulic chamber (405) is connected to the second oil circuit (408). A balancing chamber (409) is connected between the first oil circuit (404) and the second oil circuit (408). A first movable plug (410) and a second movable plug (411) are installed in the balancing chamber (409). The first movable plug (410) and the second movable plug (411) are elastically connected. The first movable plug (410) is close to the first oil circuit (404), and the second movable plug (411) is close to the second oil circuit (408). A distance meter is installed in the middle of the balancing chamber (409) for monitoring the movement of the first movable plug (410) and the second movable plug (411). If the distance between the first movable plug (410) and the second movable plug (411) is lower than a set threshold, it is determined that the gravity on the pallet is too large and an alarm is triggered.

5. The pallet locking mechanism for a picking vehicle according to claim 4, characterized in that: A balancing piston (412) is installed between the first movable plug (410) and the second movable plug (411), a first elastic rod (413) is installed between the balancing piston (412) and the first movable plug (410), and a second elastic rod (414) is installed between the balancing piston (412) and the second movable plug (411). An adjusting oil circuit (415) is connected to the middle of the balancing chamber (409). The balancing piston (412) blocks the adjusting oil circuit (415) in an initial state. A detector is provided on the adjusting oil circuit (415). In order to detect whether the adjusting oil circuit (415) is connected to the balancing chamber (409), a first pressure gauge is installed in the first hydraulic chamber (401), and a second pressure gauge is installed in the second hydraulic chamber (405). An alarm and a reset button are installed on the support platform (101).

6. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: The support platform (101) is provided with a receiving cavity (102) inside, a screw seat (103) is installed in the receiving cavity (102), a bidirectional screw (104) is installed in the screw seat (103), the bidirectional screw (104) is connected to a screw motor (106) for power, two groups of screw sliders (105) are adapted to be installed on the bidirectional screw (104), and the screw sliders (105) are fixedly connected to the clamping rod (201).

7. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: An infrared detector is installed on one side of the support platform (101) facing the clamping seat (202). The infrared detector is used to monitor the distance between the tray and the support platform (101). The infrared detector is electrically connected to the lead screw motor (106).

8. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: Anti-slip grooves are provided on the opposing surfaces of the two groups of clamping seats (202).

9. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: A distance sensor is installed on the clamping seat (202) for detecting the distance between the clamping seat (202) and the upper and lower top walls of the tray. An electric lifting rod is installed on the bearing platform (101) for adjusting the height of the bearing platform (101).

10. The pallet locking mechanism for a picking vehicle according to claim 1, characterized in that: The clamping seat (202) is mounted on the clamping rod (201).

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