Positioning and locking mechanism of weight carrying vehicle

Abstract

The utility model discloses a weight carrying vehicle positioning and locking mechanism comprising a carrying vehicle used for placing a detected weight, and the bottom of the carrying vehicle is provided with trundles; the limiting frame can achieve semi-surrounding limiting on the carrying vehicle, and the limiting frame is provided with a side opening allowing the carrying vehicle to enter and exit horizontally; the multiple guide wheels are arranged on the side face of the carrying vehicle, and the guide wheels can make rolling contact with the limiting frame; convex arms extending outwards are arranged on the two sides of the carrying vehicle, the toggle clamps are fixed to the tops of the two sides of the limiting frame, and when the carrying vehicle enters the limiting frame, clamping limiting can be achieved between the toggle clamps and the convex arms; and the inductive switch is fixed on the carrying vehicle or the limiting frame. By the adoption of the conveying vehicle, machined weights can be conveyed back and forth conveniently, then follow-up weight detection is facilitated, and the limiting and locking effects of the conveying vehicle are good.

Description

Technical Field

[0001] This utility model relates to the field of weight detection, specifically to a positioning and locking mechanism for a weight transport vehicle. Background Technology

[0002] The processed weights also need to be tested and compared, such as by comparing them with standard weights to determine if their masses match. This involves the handling and weighing of both the weights being tested and the standard weights. For heavier weights, machines are required for transport and standby. The transport and standby processes must be stable and precise; otherwise, the weights may be damaged by impacts, which will inevitably affect their accuracy. Utility Model Content

[0003] The problem to be solved by this utility model is to provide a positioning and locking mechanism for a weight transport vehicle, which facilitates the transport of processed weights and subsequent weight testing, and the limiting and locking effect of the transport vehicle is good.

[0004] To solve the above problems, this utility model provides a positioning and locking mechanism for a weight transport cart. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows:

[0005] A weight transport cart positioning and locking mechanism includes: a transport cart for placing the weight to be tested, the bottom of the transport cart having casters; a limiting frame for semi-enclosing and limiting the transport cart, the limiting frame having a side opening for the transport cart to enter and exit horizontally; guide wheels, the sides of the transport cart having a plurality of guide wheels, the guide wheels being able to roll into contact with the limiting frame; elbow clamps, the sides of the transport cart having outwardly extending protruding arms, the tops of both sides of the limiting frame having elbow clamps fixed thereon, the elbow clamps being able to clamp and limit the transport cart when it enters the limiting frame; and a sensor switch, the transport cart or the limiting frame having a sensor switch fixed thereon.

[0006] The beneficial effects of adopting the above technical solution are as follows: First, because the weights are mass-produced and a large number of weights need to be tested, the use of a transport trolley for movement allows the weights to be transported to the limiting frame, facilitating subsequent testing operations at the designated location. Second, the elbow clamp can firmly limit the transport trolley, providing manual locking. The elbow clamp has a good limiting effect, preventing the transport trolley from loosening or shifting, and maintaining stability even if the transport trolley is impacted when handling the weights. Finally, the inductive switch facilitates the detection of whether the transport trolley has entered the designated position of the limiting frame.

[0007] As a further improvement of this utility model, the two convex arms of the conveyor extend in opposite directions, and the plane of the convex arms is a vertical plane; the elbow clamp is a planar linkage mechanism, and the contact end between the elbow clamp and the convex arm has a swing freedom.

[0008] The beneficial effect of adopting the above technical solution is that the convex arm provides a clamping position, otherwise the elbow clamp would be difficult to apply force.

[0009] As a further improvement of this utility model, the limiting frame includes two mirror-symmetrically arranged side limiting frames, and the limiting frame also includes an end limiting frame. The elbow clamp is fixed on the side limiting frame. The distance between the two side limiting frames is greater than the width of the transport vehicle, and the height of the side limiting frame is lower than the height of the transport vehicle.

[0010] The beneficial effects of adopting the above technical solution are: the side limiting frame can restrict the bidirectional translational freedom of the transport vehicle along both sides, and the end limiting frame can restrict the unidirectional translational freedom of the transport vehicle along the front of the movement.

[0011] As a further improvement of this utility model, angle steel is fixed on both sides of the conveyor, and several guide wheels are movably mounted on the angle steel along the straight direction, with the axis of the guide wheels being vertical; the side limiting frame has oblique guide edges at the side opening of the limiting frame, and the oblique guide edges of the two side limiting frames can form a flared mouth.

[0012] The beneficial effects of adopting the above technical solution are: the guide wheel facilitates the smooth entry of the transport vehicle into the limit position and reduces frictional resistance.

[0013] As a further improvement of this utility model, the inductive switch is fixed to the end limiting frame, and the inductive switch is a contact type inductive switch.

[0014] The beneficial effects of adopting the above technical solution are: the contact induction switch makes it easy to detect when the transport vehicle contacts the limit frame, indicating that the transport vehicle has moved to the designated position.

[0015] As a further improvement of this utility model, the inductive switch itself has an oblong hole, the length direction of which is parallel to the opening direction of the side opening of the limiting frame.

[0016] The beneficial effects of adopting the above technical solution are: the waist-shaped hole facilitates the fine adjustment of the position of the induction switch, and thus facilitates the fine adjustment of the designated position that the transport vehicle needs to be fixed during the initial manufacturing of the mechanism.

[0017] As a further improvement of this utility model, an AGV trolley is provided below the transport vehicle.

[0018] The beneficial effect of adopting the above technical solution is that AGV trolleys can also be used to drive transport vehicles.

[0019] As a further improvement of this utility model, the middle part of the transport vehicle is equipped with a horizontal plate, and the AGV trolley can contact the lower surface of the horizontal plate.

[0020] The beneficial effects of adopting the above technical solution are: the AGV trolley can easily support the horizontal plate and slightly lift the transport vehicle for transportation.

[0021] As a further improvement of this utility model, the top of the conveyor is equipped with a baffle that partially surrounds the weight being tested. The baffle forms an open opening on one side of the conveyor, and the opening direction of the open opening is opposite to the opening direction of the side opening of the limiting frame.

[0022] The beneficial effects of adopting the above technical solution are: the baffle can prevent the weight being tested from falling, and the opening of the baffle makes it easy to pick up and put down the weight being tested from this point.

[0023] As a further improvement of this utility model, the baffle is fixed with a handle.

[0024] The beneficial effect of adopting the above technical solution is that the handle makes it easy for the trolley to be pushed manually. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of one embodiment of the positioning and locking mechanism for the weight transport vehicle of this utility model;

[0027] Figure 2 This is a partial enlarged view of point A in one embodiment of the positioning and locking mechanism of the weight transport vehicle of this utility model;

[0028] Figure 3 This is a perspective view of one embodiment of the positioning and locking mechanism for the weight transport vehicle of this utility model;

[0029] Figure 4 This is a partial enlarged view at point B of one embodiment of the positioning and locking mechanism for the weight transport vehicle of this utility model;

[0030] Figure 5 This is a perspective view of one embodiment of the automatic opening and closing windshield mechanism of the weight mass comparator of this utility model;

[0031] Figure 6 This is a partial enlarged view at point C of one embodiment of the automatic opening and closing windshield mechanism of the weight mass comparator of this utility model.

[0032] Figure 7This is a schematic diagram of the application of the fixed windshield of one embodiment of the automatic opening and closing windshield mechanism of the weight mass comparator of this utility model.

[0033] Figure 8 This is a schematic diagram of the application of the movable windshield of one embodiment of the automatic opening and closing windshield mechanism of the weight mass comparator of this utility model.

[0034] Figure 9 This is a perspective view of one embodiment of the automatic opening and closing windshield mechanism of the weight mass comparator of this utility model;

[0035] Figure 10 This is a partial enlarged view at point D of one embodiment of the automatic opening and closing windshield mechanism of the weight mass comparator of this utility model.

[0036] Figure 11 This is a perspective view of one embodiment of the positioning and locking mechanism for the weight transport vehicle of this utility model;

[0037] Figure 12 This is a perspective view of one embodiment of the positioning and locking mechanism for the weight transport vehicle of this utility model;

[0038] Figure 13 This is a partial enlarged view at point E of one embodiment of the positioning and locking mechanism of the weight transport vehicle of this utility model.

[0039] 1-Weight to be inspected; 2-AGV trolley; 3-Side limiting frame; 31-Angled guide edge; 4-Transfer trolley; 41-Level plate; 42-Baffle; 43-Handle; 44-Protruding arm; 45-Cast wheel; 5-Angle steel; 6-Guide wheel; 7-Elbow clamp; 8-Inductive switch; 9-End limiting frame; 10-Rotary motor; 11-Spiral gear; 12-Rack; 13-Comparator display; 14-Mass comparator; 15-Linear guide rail; 16-Slider; 17- Fixed windshield; 171-Front windshield; 172-Rear windshield; 18-Movable windshield; 181-Side windshield; 182-Top windshield; 19-Reinforcing plate; 191-Outward protrusion area; 20-Standard weight storage; 21-Base plate; 22-Robotic arm; 23-Control cabinet; 24-Guard railing; 25-Safety light curtain; 26-Tray block; 261-Straight groove; 27-Comb-shaped gripper; 271-Straight rib; 28-Infrared sensor; 29-Standard weight. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to specific embodiments:

[0041] In order to achieve the purpose of this utility model, such as Figure 1As shown, a weight transport cart positioning and locking mechanism includes: a transport cart 4 for placing the weight 1 to be tested, the bottom of the transport cart 4 having casters 45; a limiting frame for semi-enclosing and limiting the transport cart 4, the limiting frame having a side opening for the transport cart 4 to enter and exit horizontally; guide wheels 6, the sides of the transport cart 4 having several guide wheels 6, the guide wheels 6 being able to roll into contact with the limiting frame; elbow clamps 7, the sides of the transport cart 4 having outwardly extending protruding arms 44, the top of both sides of the limiting frame being fixed with elbow clamps 7, when the transport cart 4 enters the limiting frame, the elbow clamps 7 being able to clamp and limit the movement with the protruding arms 44; and a sensor switch 8, the transport cart 4 or the limiting frame being fixed with a sensor switch 8.

[0042] Elbow clamp 7 is a quick clamp or quick gripper that uses the dead point of the linkage mechanism for clamping and limiting.

[0043] The beneficial effects of adopting the above technical solution are as follows: First, because the weights are mass-produced and a large number of weights need to be tested, the use of a transport trolley for movement allows the weights to be transported to the limiting frame, facilitating subsequent testing operations at the designated location. Second, the elbow clamp can firmly limit the transport trolley, providing manual locking. The elbow clamp has a good limiting effect, preventing the transport trolley from loosening or shifting, and maintaining stability even if the transport trolley is impacted when handling the weights. Finally, the inductive switch facilitates the detection of whether the transport trolley has entered the designated position of the limiting frame.

[0044] like Figure 2 As shown, in some other embodiments of this utility model, the two protruding arms 44 of the conveyor 4 extend in opposite directions, and the plane of the protruding arms 44 is a vertical plane; the elbow clamp 7 is a planar linkage mechanism, and the contact end of the elbow clamp 7 and the protruding arm 44 has a swinging degree of freedom.

[0045] The convex arm 44 can be welded and fixed to the conveyor 4.

[0046] The beneficial effect of adopting the above technical solution is that the convex arm provides a clamping position, otherwise the elbow clamp would be difficult to apply force.

[0047] In some other embodiments of this utility model, the limiting frame includes two mirror-symmetrically arranged side limiting frames 3, and the limiting frame also includes an end limiting frame 9. The elbow clamp 7 is fixed on the side limiting frame 3. The distance between the two side limiting frames 3 is greater than the width of the transport vehicle 4, and the height of the side limiting frame 3 is lower than the height of the transport vehicle 4.

[0048] The beneficial effects of adopting the above technical solution are: the side limiting frame can restrict the bidirectional translational freedom of the transport vehicle along both sides, and the end limiting frame can restrict the unidirectional translational freedom of the transport vehicle along the front of the movement.

[0049] In some other embodiments of this utility model, angle steel 5 is fixed on both sides of the conveyor 3, and a number of guide wheels 6 are movably mounted on the angle steel 5 along the straight direction, with the axis of the guide wheels 6 being vertical; the side limiting frame 3 has a slanted guide edge 31 at the side opening of the limiting frame, and the slanted guide edge 31 of each of the two side limiting frames 3 can form a flared mouth.

[0050] The beneficial effects of adopting the above technical solution are: the guide wheel facilitates the smooth entry of the transport vehicle into the limit position and reduces frictional resistance.

[0051] In some other embodiments of this utility model, the inductive switch 8 is fixed to the end limiting frame 9, and the inductive switch 8 is a contact type inductive switch 8.

[0052] Multiple inductive switches 8 can be arranged in the end limit frame.

[0053] The beneficial effects of adopting the above technical solution are: the contact induction switch makes it easy to detect when the transport vehicle contacts the limit frame, indicating that the transport vehicle has moved to the designated position.

[0054] like Figure 4 As shown, in some other embodiments of this utility model, the inductive switch 8 itself has an oblong hole, the length direction of which is parallel to the opening direction of the side opening of the limiting frame.

[0055] The beneficial effects of adopting the above technical solution are: the waist-shaped hole facilitates the fine adjustment of the position of the induction switch, and thus facilitates the fine adjustment of the designated position that the transport vehicle needs to be fixed during the initial manufacturing of the mechanism.

[0056] In some other embodiments of this utility model, an AGV trolley 2 is provided below the transport vehicle 4.

[0057] The beneficial effect of adopting the above technical solution is that AGV trolleys can also be used to drive transport vehicles.

[0058] In some other embodiments of this utility model, the middle part of the transport vehicle 4 is provided with a horizontal plate 41, and the AGV trolley 2 can contact the lower surface of the horizontal plate 41.

[0059] The beneficial effect of adopting the above technical solution is that the AGV trolley can easily support the horizontal plate and slightly lift the transport vehicle for transportation.

[0060] In some other embodiments of this utility model, the top of the transport vehicle 4 is provided with a baffle 42, which partially surrounds the weight 1 to be tested. The baffle 42 forms an open opening on one side of the transport vehicle 4, and the opening direction of the open opening is opposite to the opening direction of the side opening of the limiting frame.

[0061] The beneficial effects of adopting the above technical solution are: the baffle can prevent the weight being tested from falling, and the opening of the baffle makes it easy to pick up and put down the weight being tested from this point.

[0062] In some other embodiments of this utility model, the baffle 42 is fixed with a handle 43.

[0063] The beneficial effect of adopting the above technical solution is that the handle makes it easy for the trolley to be pushed manually.

[0064] An automatic opening and closing windshield mechanism for a weight mass comparator, such as Figures 5 to 10 The system includes: a fixed windshield 17, comprising a front windshield 171 and a rear windshield 172 that are parallel to each other and vertically fixed; a movable windshield 18, comprising side windshields 181 that are parallel to each other, with a top windshield 182 fixed to the top of the two side windshields 181; a linear drive mechanism that uses a power component to drive the movable windshield 18 to move linearly back and forth; a mass comparator 14 located between the front windshield 171 and the rear windshield 172; and a comparator display 13. The movable windshield 18 has a closed limit position, at which point the front windshield 171, the rear windshield 172, and the movable windshield 18 are simultaneously in contact. The comparator display 13 is located outside the space enclosed by the movable windshield 18 and the fixed windshield 17 at the closed limit position.

[0065] The beneficial effects of adopting the above technical solution are as follows: When the fixed and movable wind hoods are closed, they form a rectangular, sealed wind hood that can enclose the mass comparator, avoiding the influence of airflow and ensuring the accuracy of quality testing. The fixed and movable wind hoods can move relative to each other; when open, the wind hood facilitates the entry and exit of the weights being tested. Only a portion of the wind hood is movable; the portion that does not obstruct the entry and exit of the weights serves as the fixed wind hood. Essentially, the wind hood has five surfaces, two of which are fixed and three are movable. Furthermore, the movement direction of the three movable and fixed surfaces is parallel to their own plane, making it difficult for the movable wind hood to stir or disturb the airflow during movement.

[0066] In some other embodiments of this utility model, the movable wind shield 18 has an open limit position, and the movable wind shield 18 performs a reciprocating translational movement between the closed limit position and the open limit position; when the limit position is open, the fixed wind shield 17 does not contact the movable wind shield 18, and the distance from the front windshield 171 to the movable wind shield 18 is less than the distance from the rear windshield 172 to the movable wind shield.

[0067] The beneficial effects of adopting the above technical solution are: the wind shield must be fully sealed when closed and fully opened when opened to allow the weights to enter and exit.

[0068] like Figure 7As shown, in some other embodiments of this utility model, the front windshield 171, the rear windshield 172, the side windshield 181, and the top windshield 182 are all rectangular in outline, and the side length of the front windshield 171 is smaller than the side length of the rear windshield 172.

[0069] The beneficial effects of adopting the above technical solution are: the front windshield is relatively small, which makes it easy for the movable windshield to pass through without stopping, while the rear windshield can be relatively large, which can be used as a limit to stop the movable windshield and prevent it from moving further.

[0070] In some other embodiments of this utility model, the front windshield 171, rear windshield 172, side windshield 181, and top windshield 182 are each framed by square tubes or aluminum profiles, and the middle part of each of the front windshield 171, rear windshield 172, side windshield 181, and top windshield 182 is a transparent plate fixed to the square tubes or aluminum profiles.

[0071] The beneficial effects of adopting the above technical solution are: the transparent wind shield is easy for external personnel to observe, and the structural strength of the wind shield can meet the requirements and is not easily deformed under long-term use.

[0072] like Figure 8 As shown, in some other embodiments of the present invention, the linear drive mechanism includes a linear guide rail 15 and a slider 16 that are movably assembled with each other, and the slider 16 is fixed to the bottom of the side baffle 181.

[0073] The beneficial effect of adopting the above technical solution is that the linear guide and slider make the linear reciprocating motion smoother.

[0074] In some other embodiments of this utility model, the linear drive mechanism includes a rotary motor 10, which drives a rack 12 via a spur gear 11, and the rack 12 is fixed to a movable fan cover 18.

[0075] The power component can be a rotary motor 10, or it can be other hydraulic or pneumatic power devices.

[0076] The beneficial effect of adopting the above technical solution is that gears and racks can easily convert rotational power into linear reciprocating motion.

[0077] like Figure 10 As shown, in some other embodiments of the present invention, the rack 12 is fixed to a side windshield 181 by a reinforcing plate 19. The reinforcing plate 19 has an outwardly protruding area 191 that protrudes from the side windshield 181, and one end of the rack 12 is located in the outwardly protruding area 191.

[0078] The beneficial effects of adopting the above technical solution are: the convex area makes it easier to make the rack longer, which facilitates the full opening of the movable fan shroud, rather than partially overlapping with the fixed fan shroud.

[0079] In some other embodiments of this utility model, the mass comparator 14 and the comparator display 13 are located between two linear guide rails 15.

[0080] The mass comparator 14 is used to alternate between the tested weight 1 and the standard weight 29. The tested weight 1 is the processed weight to be tested, and the standard weight 29 is the weight used as a standard reference.

[0081] The advantages of adopting the above technical solution are: the mass comparator and the comparator display are conveniently located in two positions, making full use of space. The comparator display can show the results of the mass comparison of the weights.

[0082] In some other embodiments of this invention, the rotary motor 10 is located on the same side of the two linear guide rails 15.

[0083] The beneficial effect of adopting the above technical solution is that the rotary motor is located on the outside, which does not affect the mass comparator and the comparator display.

[0084] In some other embodiments of this utility model, the edges of the front windshield 171 and the rear windshield 172 are provided with elastic sealing strips, which can contact the movable windshield 18.

[0085] The flexible sealing strip can be a rubber sealing strip or a flexible brush.

[0086] The beneficial effect of adopting the above technical solution is that the elastic sealing strip can improve airtightness.

[0087] like Figures 11 to 13 As shown, a weight quality inspection robot device includes: a standard weight station for placing standard weights 29; a weight to be inspected station for placing weights to be inspected 1; a mass comparator 14 for weighing the standard weights 29 and the weights to be inspected 1 respectively; and a robotic arm 22 for moving the standard weights 29 between the standard weight station and the mass comparator 14, and for moving the weights to be inspected 1 between the weights to be inspected station and the mass comparator 14. The robotic arm 22 has a comb-shaped gripper 27 at its end, which includes several parallel straight ribs 271. The standard weight station, the weight to be inspected station, and the mass comparator 14 are all equipped with a tray block 26 on their tops, and the tray block 26 has several parallel straight grooves 261 recessed within it.

[0088] Robotic arm 22 is a six-axis robotic arm. The standard weight station is the standard weight library 20, and the weight to be inspected station is the transport cart 4.

[0089] The robotic arm 22 is electrically connected to the control cabinet 23.

[0090] The beneficial effects of adopting the above technical solution are as follows: A robotic arm is used to transfer the two materials, the weight to be tested and the standard weight. The transfer area consists of three areas: the standard weight station, the weight to be tested station, and the mass comparator. Automated transfer allows for rapid, alternating testing of the mass of the weight to be tested and the standard weight, enabling comparison of the difference between the two to quickly determine whether the mass of the weight to be tested meets the requirements. Furthermore, the comb-shaped gripper and tray facilitate lifting and lowering the weight from the bottom, rather than using a clamping method, avoiding the crushing damage caused by clamping. The comb-shaped gripper and tray can interweave without interfering, thus enabling contact with only the bottom of the weight throughout the entire process.

[0091] like Figure 13 As shown, in some other embodiments of this utility model, the distance between the center lines of adjacent straight ribs 271 is equal to the distance between the center lines of adjacent straight grooves 261, the width of the straight rib 271 is less than the width of the straight groove 261, and the thickness of the straight rib 271 is less than the depth of the straight groove 261.

[0092] The beneficial effects of adopting the above technical solution are: ensuring that the comb-shaped gripper and the pallet block do not interfere with each other, while the straight ribs have sufficient exit space in the straight groove.

[0093] In some other embodiments of this utility model, the width of the straight groove 261 is smaller than the diameter of the standard weight 29 and the weight being tested 1.

[0094] The beneficial effect of adopting the above technical solution is that the weights are placed on the top of the tray block, and the straight groove is relatively narrow, which will not affect the stable placement of the weights.

[0095] In some other embodiments of this invention, the mass comparator 14 is also provided with two infrared sensors 28 facing each other.

[0096] The beneficial effects of adopting the above technical solution are: the infrared sensor can detect whether there is a comb-shaped gripper continuing to fall, which can prevent the comb-shaped gripper from moving too far downward and touching the mass comparator.

[0097] In some other embodiments of this utility model, the standard weight station, the weight under test station, and the mass comparator 14 are all located on the same side of the robotic arm 22.

[0098] The beneficial effect of adopting the above technical solution is that it can shorten the turnover path length of the robotic arm.

[0099] In some other embodiments of this utility model, the standard weight station and the tested weight station are at different heights, and the top of the standard weight 29 on the standard weight station is lower than the bottom of the tested weight 1 on the tested weight station.

[0100] The beneficial effect of adopting the above technical solution is that when the standard weight and the weight to be tested are picked up and put down separately, the paths are staggered, making it less likely to cause interference.

[0101] In some other embodiments of this utility model, the standard weight station, the mass comparator 14, and the robotic arm 22 are all fixed to the same base plate 21.

[0102] The beneficial effect of adopting the above technical solution is that it ensures that each workstation is fixed as a whole and that the straight-line distance between them is fixed.

[0103] In some other embodiments of this utility model, the standard weight station and the mass comparator 14 are provided with a protective railing 24 on the side facing away from the robotic arm 22.

[0104] The beneficial effect of adopting the above technical solution is that the guardrail can increase safety.

[0105] In some other embodiments of this utility model, the weight testing station includes a movable transport vehicle 4, and the guardrail 24 has a passage for the transport vehicle 4 to enter and exit.

[0106] The beneficial effect of adopting the above technical solution is that having only one channel facilitates the loading and unloading of the weights being tested.

[0107] In some other embodiments of this utility model, safety light curtains 25 are provided on both sides of the channel.

[0108] The beneficial effects of adopting the above technical solution are: it can ensure the safety of operators and prevent personnel from accidentally entering the working area of ​​the robotic arm.

[0109] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A positioning and locking mechanism for a weight transport cart, characterized in that, include: A transport cart is used to place the weights to be inspected, and the bottom of the transport cart is equipped with casters; The limiting frame can partially surround and limit the transport vehicle, and the limiting frame has a side opening for the transport vehicle to enter and exit horizontally; The side of the transport vehicle is equipped with several guide wheels, which can make rolling contact with the limiting frame; Elbow clamps are provided on both sides of the conveyor with outwardly extending protruding arms. Elbow clamps are fixed to the top of both sides of the limiting frame. When the conveyor enters the limiting frame, the elbow clamps can clamp and limit the movement with the protruding arms. A sensor switch is fixed to the conveyor or the limiting frame.

2. The weight conveying trolley positioning and locking mechanism according to claim 1, characterized in that: The two convex arms of the conveyor extend in opposite directions, and the plane of the convex arms is a vertical plane; The elbow clamp is a planar linkage mechanism, and the contact end between the elbow clamp and the convex arm has a swinging degree of freedom.

3. The weight conveying trolley positioning and locking mechanism according to claim 1, characterized in that: The limiting frame includes two mirror-symmetrically arranged side limiting frames, and the limiting frame also includes an end limiting frame. The elbow clamp is fixed to the side limiting frames. The distance between the two side limiting frames is greater than the width of the transport vehicle, and the height of the side limiting frames is lower than the height of the transport vehicle.

4. The weight conveying trolley positioning and locking mechanism according to claim 3, characterized in that: Angle steel is fixed on both sides of the transport vehicle, and several guide wheels are movably mounted on the angle steel along a straight line, with the axis of the guide wheels being vertical. The side limiting frame has a slanted guide edge at the side opening of the limiting frame, and the slanted guide edges of the two side limiting frames can form a flared mouth.

5. The weight conveying trolley positioning and locking mechanism according to claim 3, characterized in that: The inductive switch is fixed to the end limiting frame, and the inductive switch is a contact type inductive switch.

6. The weight conveying trolley positioning and locking mechanism according to claim 1, characterized in that: The inductive switch itself has an oblong hole, the length direction of which is parallel to the opening direction of the side opening of the limiting frame.

7. The weight conveying trolley positioning and locking mechanism according to claim 1, characterized in that: An AGV (Automated Guided Vehicle) is installed below the transport vehicle.

8. The weight conveying trolley positioning and locking mechanism according to claim 7, characterized in that: The transport vehicle has a horizontal plate in the middle, and the AGV trolley can contact the lower surface of the horizontal plate.

9. The weight conveying trolley positioning and locking mechanism according to claim 1, characterized in that: The top of the transport vehicle is equipped with a baffle that partially surrounds the weight being tested. The baffle forms an opening on one side of the transport vehicle, and the opening direction of the opening is opposite to the opening direction of the side opening of the limiting frame.

10. The weight conveying trolley positioning and locking mechanism according to claim 9, characterized in that: The baffle is fixed with a handle.

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