A trolley positioning fixture

Abstract

This utility model discloses a trolley positioning fixture, including a positioning frame, a guide assembly, and a clamping assembly. The positioning frame is n-shaped, with its front and rear ends connected. The front end of the positioning frame is the inlet end, and the rear end of the trolley is the outlet end. The guide assembly is located at the lower inner end of the positioning frame, and the clamping assembly is located at the upper inner end of the positioning frame. The trolley enters the positioning frame through the inlet end, and the guide assembly and clamping assembly jointly guide the trolley to be centered in the left-right direction. Thus, the trolley can be manually pushed from the front end of the positioning frame into the positioning frame, and the guide assembly and clamping assembly guide the trolley to be centered within the positioning frame. At this point, an AGV forklift can accurately remove the trolley from the rear end of the positioning frame.

Description

Technical Field

[0001] This utility model belongs to the field of intelligent factory technology, and in particular relates to a trolley positioning fixture. Background Technology

[0002] In various production workshops, pallets are commonly used to transport components. Trolleys are used in this process, and they can hold multiple layers of pallets. The bottom of the trolley has wheels, and currently, they are mostly pushed by people to the corresponding workstations. However, this method is inefficient. With the development of AGV (Automated Guided Vehicle) technology, AGV forklifts have emerged. These forklifts can lift and move trolleys to the corresponding workstations on their own. However, before the AGV forklift can lift the trolley, it needs to be accurately positioned so that the AGV forklift can lift the trolley. Currently, positioning marks are usually drawn on the ground, and people push the trolley to the positioning marks for alignment. However, this method results in low accuracy and efficiency for manual positioning. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a trolley positioning fixture that is simple in structure, convenient in positioning and has high positioning accuracy.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A trolley positioning fixture includes a positioning frame, a guide assembly, and a clamping assembly. The positioning frame is n-shaped with its front and rear ends connected. The front end of the positioning frame is the inlet end, and the rear end of the positioning frame is the outlet end. The guide assembly is located at the lower inner end of the positioning frame, and the clamping assembly is located at the upper inner end of the positioning frame. The trolley enters the positioning frame through the inlet end, and the guide assembly and the clamping assembly jointly guide the trolley to be centered in the left-right direction.

[0005] The beneficial effect of the above technical solution is that the trolley can be directly pushed from the front end of the positioning frame into the positioning frame by human intervention, and the guiding component and clamping component can guide the trolley to the center in the positioning frame. At this time, the AGV forklift can accurately take the trolley away from the rear end of the positioning frame.

[0006] The above technical solution also includes a position sensor, a controller, and an alarm. The alarm, position sensor, and controller are all mounted on the positioning frame. The position sensor is used to sense whether the trolley is in position in the front-back direction within the positioning frame.

[0007] The beneficial effect of the above technical solution is that once the position sensor detects that the trolley is in place within the positioning frame, the controller can activate the alarm to issue an alarm signal to alert the operator.

[0008] The alarm described in the above technical solution is an audible and visual alarm, a buzzer, or a speaker.

[0009] The advantages of the above technical solution are that it has a simple structure and clear alarm signals that are easy for operators to identify.

[0010] The position sensor mentioned in the above technical solution is a proximity switch, limit switch, or photoelectric sensor.

[0011] The advantages of the above technical solution are that it has a simple structure and high sensing accuracy.

[0012] The above technical solution also includes an information reader installed on the positioning frame, an information carrier installed at the corresponding position of the trolley, and the information reader being electrically connected to the controller.

[0013] The beneficial effects of the above technical solution are as follows: the ID information of the trolley can be identified, and it can also be determined whether the trolley is in position within the positioning frame. Only when the position sensor senses the signal that the trolley is in position within the positioning frame, and the information reader recognizes the signal of the information carrier, can it be considered that the trolley is in position within the positioning frame.

[0014] The guide assembly described in the above technical solution includes two guide bars arranged horizontally in the front-back direction. The two guide bars are respectively located at the lower ends of the inner walls on both sides of the positioning frame. The front and rear ends of the two guide bars are close to each other on the first inclined surface that flares outward. The trolley is located between the two guide bars.

[0015] The beneficial effect of the above technical solution is that its structure is simple, which allows the two guide bars to guide the lower end of the trolley to the center.

[0016] The clamping assembly described in the above technical solution includes an adjusting seat, an elastic seat, and two clamping bars. The two clamping bars are a fixed clamping bar and a movable clamping bar, both of which are horizontally arranged in the front-to-back direction. The fixed clamping bar is mounted on the upper end of the inner wall of one side of the positioning frame via the adjusting seat, and the movable clamping bar is mounted on the upper end of the inner wall of the other side of the positioning frame via the elastic seat. The trolley is located between the fixed clamping bar and the movable clamping bar. The elastic force of the elastic seat is used to drive the movable clamping bar to move horizontally closer to the fixed clamping bar. The front and rear ends of the fixed clamping bar and the movable clamping bar are both inclined surfaces that flare outwards.

[0017] The beneficial effects of the above technical solution are as follows: when the trolley enters or exits the positioning frame, the movable clamp has a retraction and avoidance function under the action of the elastic seat, which can avoid the trolley getting stuck when entering or exiting the positioning frame, and at the same time, it can also assist the guide component in guiding the trolley to the center within the positioning frame.

[0018] In the above technical solution, the upper ends of both sides of the positioning frame are widened outward and respectively form mounting grooves. The fixed clamping bar is set in the mounting groove on one side through the adjusting seat, and the movable clamping bar is set in the mounting groove on the other side through the elastic seat.

[0019] The beneficial effects of the above technical solution are that the internal space of the entire positioning frame is wider at the top and narrower at the bottom, so that the clamping components can be installed inside the positioning frame, and the upper part of the positioning frame can provide buffer space for avoidance.

[0020] The adjusting seat described in the above technical solution includes a first mounting strip, multiple threaded rods, and multiple nuts. The first mounting strip is arranged on the corresponding side of the positioning frame along the front-back direction. The first mounting strip has multiple mounting holes that pass through from left to right and are spaced apart along the front-back direction. The multiple threaded rods are arranged horizontally along the left-right direction on the side of the fixed clamping strip away from the movable clamping strip, and the multiple threaded rods are spaced apart along the front-back direction. The multiple threaded rods correspond one-to-one with the multiple mounting holes. Each threaded rod passes through the corresponding mounting hole, and each threaded rod has a nut threadedly connected to both sides of the first mounting strip. The nuts on both sides of the first mounting strip clamp the first mounting strip.

[0021] The beneficial effect of the above technical solution is that the position of the fixing strip in the left and right directions can be adjusted as needed.

[0022] The elastic seat described in the above technical solution includes a second mounting strip, an elastic element, multiple sliding rods, and multiple limiting elements. The second mounting strip is arranged on the corresponding side of the positioning frame along the front-back direction. The second mounting strip has multiple sliding holes that pass through from left to right and are spaced apart along the front-back direction. The multiple sliding rods are arranged horizontally along the left-right direction on the side of the movable clamping strip opposite to the fixed clamping strip, and the multiple sliding rods are spaced apart along the front-back direction. The multiple sliding rods and the multiple sliding holes correspond one-to-one. Each sliding rod passes through the corresponding sliding hole, and at least two of the sliding rods are equipped with limiting elements at the end of the second mounting strip opposite to the movable clamping strip. The elastic element is arranged between the second mounting strip and the movable clamping strip.

[0023] The beneficial effect of the above technical solution is that the movable clamping bar has a buffering and retraction function, and its minimum distance from the fixed clamping bar can be adjusted as needed. Attached Figure Description

[0024] Figure 1 This is an elevation view of the cart;

[0025] Figure 2 An elevation view of the cart from another perspective;

[0026] Figure 3 This is a front view of the cart;

[0027] Figure 4 This is a front view of the trolley positioning fixture described in an embodiment of the present invention;

[0028] Figure 5 This is an elevation view of the trolley positioning fixture described in an embodiment of the present utility model;

[0029] Figure 6 This is a top view of the clamping assembly described in the embodiment of this utility model;

[0030] Figure 7 This is a top view of the assembly of the movable clamping bar and the elastic seat in an embodiment of this utility model;

[0031] Figure 8 This is an elevation view of the positioning frame described in an embodiment of this utility model;

[0032] Figure 9 This is a front view of the trolley in its positioned position within the trolley positioning fixture.

[0033] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0034] Figure 11 This is a schematic diagram of the electrical connections of the controller described in an embodiment of this utility model.

[0035] In the diagram: 10. Trolley positioning fixture; 11. Positioning frame; 111. Mounting slot; 112. Column; 1121. Horizontal section; 1122. Vertical section; 1122a. Upper vertical section; 1122b. Lower vertical section; 113. Longitudinal beam; 114. Crossbeam; 115. Mounting foot; 12. Guide assembly; 121. Guide strip; 122. First inclined surface; 13. Clamping assembly; 131. Adjusting seat; 1311. First mounting strip; 13111. Mounting hole; 1312. Threaded rod; 1313. Nut; 132. Elastic seat; 1 321. Second mounting strip; 13211. Sliding hole; 1322. Sliding rod; 1323. Elastic element; 1324. Limiting element; 133. Clamping strip; 133a. Fixed clamping strip; 133b. Movable clamping strip; 1331. Second inclined surface; 14. Position sensor; 15. Controller; 16. Alarm; 17. Information reader; 20. Trolley; 21. Information carrier; 22. Base plate; 23. Top plate; 24. Support column; 25. Wheel; 26. Enclosure; 27. Handle; 28. Guide strip; 281. Vertical part; 282. Horizontal part. Detailed Implementation

[0036] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] It is understood that spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “below,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0039] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0040] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0041] like Figures 1-3As shown, the specific structure of the trolley 20 in the current related technology is as follows: it includes a base plate 22, a top plate 23, four support columns 24 and four wheels 25. The base plate 22 and the top plate 23 are both horizontally arranged and are both square plates. The top plate 23 is located above the base plate 22. The four support columns 24 are vertically arranged at the four corners of the base plate 22. The four wheels 25 are arranged at the four corners at the lower end of the base plate 22. The trolley 20 is open on the left or right side (the other three sides can be fully or semi-closed by a panel 26). The front side of the trolley 20 is provided with a handle 27 (the handle 27 is an "n" shaped handle). The open side of the trolley 20 is used to load and unload stacked pallets. The left and right sides of the base plate 22 are both horizontally arranged with "L" shaped guide strips 28 (the guide strips 28 are angle steel strips) in the front and back directions, and the bottom edges of the two guide strips 28 face away from each other.

[0042] See details Figure 1 As shown, the guide bar 28 in the related art has a vertical portion 281 and a horizontal portion 282. The horizontal portion 282 is located at the lower end of the vertical portion 281, and the horizontal portions 282 of both guide bars 28 protrude outward.

[0043] like Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, this embodiment provides a trolley positioning fixture 10, including a positioning frame 11, a guide assembly 12, and a clamping assembly 13. The positioning frame 11 is n-shaped, with its front and rear ends connected. The front end of the positioning frame 11 is the inlet end, and the rear end is the outlet end. The guide assembly 12 is located at the lower inner end of the positioning frame 11, and the clamping assembly 13 is located at the upper inner end of the positioning frame 11. The trolley 20 enters the positioning frame 11 through the inlet end, and the guide assembly 12 and the clamping assembly 13 jointly guide the trolley 20 to be centered in the left-right direction. In this way, the trolley 20 can be directly pushed from the front end of the positioning frame 11 into the positioning frame 11, and the guide assembly 12 and the clamping assembly 13 guide the trolley 20 to be centered in the positioning frame 11. At this time, the AGV forklift can accurately remove the trolley 20 from the rear end of the positioning frame 11.

[0044] like Figure 4 , Figure 5 and Figure 9As shown, in this embodiment, the guide assembly 12 includes two guide bars 121 arranged horizontally along the front-back direction. The two guide bars 121 are respectively disposed at the lower ends of the inner walls on both sides of the positioning frame 11. The front and rear ends of the two guide bars 121 are close to each other, and both sides are first inclined surfaces 122 that flare outwards. The trolley 20 is located between the two guide bars 121. Its structure is simple, thus guiding the lower end of the trolley 20 to be centered.

[0045] like Figures 4-7 As shown, the clamping assembly 13 in this embodiment includes an adjusting seat 131, an elastic seat 132, and two clamping bars 133. The two clamping bars 133 are a fixed clamping bar 133a and a movable clamping bar 133b, respectively. Both the fixed clamping bar 133a and the movable clamping bar 133b are horizontally arranged in the front-back direction. The fixed clamping bar 133a is installed on the upper end of the inner wall of one side of the positioning frame 11 through the adjusting seat 131, and the movable clamping bar 133b is installed on the upper end of the inner wall of the other side of the positioning frame 11 through the elastic seat 132. The trolley 20 is located between the fixed clamping bar 133a and the movable clamping bar 133b. The elastic force of the elastic seat 132 is used to drive the movable clamping bar 133b to move horizontally closer to the fixed clamping bar 133a. The sides of the fixed clamping bar 133a and the movable clamping bar 133b that are close to each other at the front and rear ends are both outwardly flared second inclined surfaces 1331. This allows the movable clamping bar 133b to have a retraction and avoidance function under the action of the elastic seat 132 when the trolley 20 enters and exits the positioning frame 11. This can prevent the trolley 20 from getting stuck when entering and exiting the positioning frame 11, and at the same time, it can also assist the guide component 12 in guiding the trolley 20 to the center within the positioning frame 11.

[0046] like Figure 6As shown, in this embodiment, the adjusting seat 131 includes a first mounting strip 1311, multiple threaded rods 1312, and multiple nuts 1313. The first mounting strip 1311 is arranged along the front-back direction on the corresponding side of the positioning frame 11. The first mounting strip 1311 has multiple mounting holes 13111 that pass through left and right and are spaced apart along the front-back direction. The multiple threaded rods 1312 are arranged horizontally along the left-right direction on the side of the fixed clamping strip 133a away from the movable clamping strip 133b, and the multiple threaded rods 1312 are spaced apart along the front-back direction. The multiple threaded rods 1312 correspond one-to-one with the multiple mounting holes 13111. Each threaded rod 1312 passes through the corresponding mounting hole 13111, and each threaded rod 1312 is threaded with a nut 1313 on both sides of the first mounting strip 1311. The nuts 1313 on both sides of the first mounting strip 1311 clamp the first mounting strip 1311. This allows the position of the fixing bar 133a in the left and right directions to be adjusted as needed.

[0047] like Figure 6 and Figure 7 As shown, the elastic seat 132 in this embodiment includes a second mounting strip 1321, an elastic element 1323, multiple sliding rods 1322, and multiple limiting elements 1324. The second mounting strip 1321 is arranged on the corresponding side of the positioning frame 11 in the front-back direction. The second mounting strip 1321 has multiple sliding holes 13211 that pass through left and right and are spaced apart in the front-back direction. The multiple sliding rods 1322 are arranged horizontally in the left-right direction on the movable clamping strip 133b away from the fixed clamping strip 133. On one side of the fixed clamping bar 133a, multiple sliding rods 1322 are spaced apart in the front-to-back direction. Each sliding rod 1322 corresponds to one of the multiple sliding holes 13211. Each sliding rod 1322 passes through a corresponding sliding hole 13211, and a limiting element 1324 is installed on the end of each sliding rod 1322 opposite to the movable clamping bar 133b located on the second mounting bar 1321. The elastic element 1323 is disposed between the second mounting bar 1321 and the movable clamping bar 133b. This allows the movable clamping bar 133b to have a buffering retraction function, and its minimum distance from the fixed clamping bar 133a can be adjusted as needed.

[0048] Preferably, the elastic element 1323 is a spring, which is sleeved on the slide rod 1322, or the elastic element 1323 is an elastic rubber block, which is installed in the middle of the corresponding side of the first mounting strip.

[0049] like Figure 6As shown, in this embodiment, multiple movable clamping strips 133b and elastic seats 132 can be provided. Each movable clamping strip 133b corresponds to one elastic seat 132. The multiple movable clamping strips 133b are spaced apart along the front-back direction at corresponding positions on the positioning frame 11, and are respectively mounted on the inner sidewall of the positioning frame 11 via their corresponding elastic seats 132. Since the multiple elastic seats 132 are spaced apart along the front-back direction, they can share a single second mounting strip 1321. Preferably, only two movable clamping strips 133b and two elastic seats 132 are required.

[0050] like Figure 6 and Figure 7 As shown, for a single elastic seat 132, it is preferable to use a spring as the elastic element; at this time, multiple elastic elements can be provided, and multiple elastic elements correspond one-to-one with multiple slide rods, and one elastic element is sleeved on each slide rod (such as two slide rods and two elastic elements can be provided), or when there are at least three slide rods, an elastic element can be sleeved on the middle part of the slide rod.

[0051] like Figure 6 and Figure 7 As shown, for a single elastic seat 132, two limiting members can be provided. If there are only two sliding rods, each sliding rod is provided with a limiting member. When there are at least three sliding rods, the two outermost sliding rods can be provided with limiting members, while the middle sliding rod is not provided with a limiting member.

[0052] like Figure 6 and Figure 7 As shown, the limiting component in this embodiment can be a pin (in which case a pin hole needs to be provided radially at the end of the slide rod away from the movable clamping block for the limiting component to be inserted, and the pin can be an R-shaped pin) or a nut (in which case a thread needs to be provided at the end of the slide rod away from the movable clamping block for the limiting component to be installed). These are conventional technical means in the field and will not be described in detail here.

[0053] like Figure 5 and Figure 8 As shown, the positioning frame 11 in this embodiment can be a hollow structure, with two columns 112 arranged vertically and spaced apart along the front-back direction on both sides. The upper, middle and bottom of the two columns 112 on the same side are provided with longitudinal beams 113 along the front-back direction (the two ends of the longitudinal beams 113 are connected to the corresponding two columns 112). The top of the positioning frame 11 is provided with a horizontal beam 114 arranged along the left-right direction at the front and rear ends and the lower rear end. The two horizontal beams 114 at the top and the two longitudinal beams 113 at the top are connected to form a square frame.

[0054] The crossbeam located at the lower rear end is a flat strip and horizontally positioned (thickness can be 0.2-0.5mm), which avoids affecting the convenience of the AGV forklift taking the cart away from the rear of the positioning frame.

[0055] like Figure 4 , Figure 5 and Figure 8 As shown, the bottom ends of both sides of the positioning frame 11 are also provided with L-shaped mounting feet 115 (the mounting feet 115 are angle steel strips) in the forward direction. The two mounting feet 115 are arranged in a manner similar to the two guide strips 28. The two mounting feet 115 rest on the ground and are installed on the ground by expansion bolts (the lower end of the mounting feet 115 has multiple holes spaced apart in the forward and backward direction for the expansion bolts to pass through), thereby installing the entire positioning frame 11 on the ground.

[0056] like Figure 4 , Figure 8 and Figure 9 As shown, in this embodiment, the upper ends of both sides of the positioning frame 11 widen outward and form mounting grooves 111 respectively. The fixed clamping bar 133a is disposed in the mounting groove 111 on one side through the adjusting seat 131, and the movable clamping bar 133b is disposed in the mounting groove 111 on the other side through the elastic seat 132. This makes the internal space of the entire positioning frame 11 wider at the top and narrower at the bottom, so that the clamping assembly 13 can be installed in the positioning frame 11, and the upper part of the positioning frame 11 can provide a buffer space for avoidance.

[0057] Specifically, such as Figure 8 As shown, in this embodiment, the column 112 has a horizontal section 1121 and two vertical sections 1122 (an upper vertical section 1122a and a lower vertical section 1122b, respectively). The horizontal section 1121 is horizontally arranged in the left-right direction. The lower end of the upper vertical section 1122a is connected to the end of the horizontal section 1121 away from the middle of the positioning frame 11. The upper end of the lower vertical section 1122b is connected to the other end of the horizontal section 1121. This widens the upper end of the positioning frame 11 and forms mounting grooves 111 on both sides.

[0058] like Figure 4 , Figure 5 , Figure 9 and Figure 11As shown, the trolley positioning fixture 10 provided in this embodiment also includes a position sensor 14, a controller 15, and an alarm 16. The alarm 16, position sensor 14, and controller 15 are all mounted on the positioning frame 11. The position sensor 14 is used to sense whether the trolley 20 is in position within the positioning frame 11 in the front-back direction. Thus, once the position sensor 14 detects that the trolley 20 is in position within the positioning frame 11, the controller 15 can control the alarm 16 to issue an alarm signal to alert the operator.

[0059] In this embodiment, the alarm 16 is an audible and visual alarm, a buzzer, or a speaker. It has a simple structure and provides a clear alarm signal that is easily identifiable by the operator.

[0060] In this embodiment, the position sensor 14 is a proximity switch, limit switch, or photoelectric sensor. It has a simple structure and high sensing accuracy.

[0061] In this embodiment, the controller 16 can be an ARM series microcontroller.

[0062] like Figure 4 , Figure 5 , Figure 9 and Figure 11 As shown, the trolley positioning fixture 10 provided in this embodiment also includes an information reader 17 disposed on the positioning frame 11, and an information carrier 21 disposed at the corresponding position of the trolley 20. The information reader 17 is electrically connected to the controller 15. This allows for the identification of the trolley's ID information and also determines whether the trolley is in position within the positioning frame. Only when the position sensor detects a signal indicating that the trolley is in position within the positioning frame, and the information reader identifies the signal from the information carrier, can it be considered that the trolley is in position within the positioning frame.

[0063] Preferably, the information carrier 21 is disposed on the side of the trolley 20 away from its open side (preferably located in the middle of that side).

[0064] In this embodiment, the information carrier 21 can be an RFID chip, a QR code, an NFC chip, or an ID chip, and the corresponding information reader 17 can be an RFID reader, a barcode scanning camera, an NFC reader, or an ID reader. Preferably, in this embodiment, the information carrier 21 is an RFID chip, and the information reader 17 is an RFID reader. In this embodiment, the information carrier 21 can pre-store relevant information of the components in the trolley, and the AGV forklift can later transfer them to the corresponding workstation.

[0065] like Figure 4 , Figure 5 and Figure 9As shown, in this embodiment, the alarm 16 and controller 15 can be set at the top of the positioning frame 11, and the information reader 17 can be installed in the mounting slot on the corresponding side and located below the clamping assembly. When the trolley 20 is in place in the positioning frame 11, the information carrier 21 and the information reader 17 need to be aligned with each other in the left and right direction (and close to each other) so that the information reader 17 can obtain the information stored in the information carrier 21.

[0066] In this embodiment, the position sensor 14 is preferably a photoelectric sensor (specifically, a photoelectric ranging sensor). It is set at the front end of the corresponding side inside the positioning frame 11 (specifically, it is set below the mounting groove 111, and its installation height is preferably aligned with the middle of the height direction of the side panel 26 of the trolley 20). When the trolley 20 enters the positioning frame 11 from the front end, it will enter the field of view of the position sensor 14. When the trolley 20 is in position inside the positioning frame 11, it will move out of the field of view of the position sensor 14. The moment it moves out can be regarded as the trolley 20 being in position inside the positioning frame 11.

[0067] In this embodiment, the position sensor 14 and the information reader 17 work together to determine whether the trolley is in position within the positioning frame. That is, after the position sensor 14 senses that the trolley is in position within the positioning frame and the information reader 17 obtains the stored information of the information carrier, it is determined that the trolley is in position, thus avoiding misjudgment.

[0068] Specifically, such as Figure 9 and Figure 10 As shown, in this embodiment, after the trolley enters the positioning frame, the guide strip 121 is horizontally aligned with the base plate 22, and the two clamping strips 133 are aligned with the top plate 23. In this embodiment, the top plate and the base plate have the same shape and size specifications. The distance between the two guide strips is slightly larger than the width of the base plate. Similarly, in the initial state of the elastic seat, the distance between the two clamping strips is slightly smaller than the width of the top plate. However, after the top plate enters between the two clamping strips, it will squeeze the movable clamping strips to avoid them, thereby achieving a certain clamping force applied to the top plate by the two clamping strips.

[0069] like Figure 4 As shown, in this embodiment, the inner sides of the guide strip and the clamping strip on the same side are slightly aligned vertically (the inner side of the fixed clamping strip is vertically aligned with the inner side of the guide strip on the same side, while the inner side of the movable clamping strip protrudes slightly 0.5-2cm into the center of the positioning frame compared to the inner side of the guide strip on the same side, so as to reserve a retraction allowance).

[0070] like Figure 9 and Figure 10As shown, after the trolley is in place within the positioning frame, the two horizontal parts will extend into the lower part of the guide bar on the corresponding side, and there is a certain gap between them in the vertical direction. This allows the AGV forklift to only slightly lift the trolley (lift it slightly off the ground, and the horizontal part is still located below the guide bar on the corresponding side) and move backward at the rear end of the positioning frame to remove the trolley from the rear end of the positioning frame. Then, the trolley is normally raised to a certain height and transferred to the corresponding workstation.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cart positioning fixture, comprising: The device includes a positioning frame (11), a guide assembly (12), and a clamping assembly (13). The positioning frame (11) is n-shaped with its front and rear ends connected. The front end of the positioning frame (11) is the inlet end, and the rear end of the positioning frame (11) is the outlet end. The guide assembly (12) is located at the lower inner end of the positioning frame (11), and the clamping assembly (13) is located at the upper inner end of the positioning frame (11). The trolley (20) enters the positioning frame (11) through the inlet end, and the guide assembly (12) and the clamping assembly (13) together guide the trolley (20) to be centered in the left-right direction.

2. The cart positioning fixture of claim 1, wherein, It also includes a position sensor (14), a controller (15) and an alarm (16), all of which are mounted on the positioning frame (11). The position sensor (14) is used to sense whether the trolley (20) is in position in the front-back direction within the positioning frame (11).

3. The cart positioning fixture of claim 2, wherein, The alarm (16) is an audible and visual alarm, a buzzer or a loudspeaker.

4. The cart positioning fixture of claim 2, wherein, The position sensor (14) is a proximity switch, limit switch or photoelectric sensor.

5. The cart positioning fixture of claim 2, wherein, It also includes an information reader (17) installed on the positioning frame (11), and an information carrier (21) is installed at the corresponding position of the trolley (20). The information reader (17) is electrically connected to the controller (15).

6. The cart positioning fixture of any one of claims 1-5, wherein, The guide assembly (12) includes two guide bars (121) arranged horizontally in the front-back direction. The two guide bars (121) are respectively arranged at the lower ends of the inner walls on both sides of the positioning frame (11). The two guide bars (121) are close to each other on the front and back sides, and the first inclined surface (122) is flared outward. The trolley (20) is located between the two guide bars (121).

7. The cart positioning fixture of any one of claims 1-5, wherein, The clamping assembly (13) includes an adjusting seat (131), an elastic seat (132), and two clamping bars (133). The two clamping bars (133) are a fixed clamping bar (133a) and a movable clamping bar (133b), respectively. Both the fixed clamping bar (133a) and the movable clamping bar (133b) are horizontally arranged in the front-back direction. The fixed clamping bar (133a) is installed on the upper end of the inner wall of one side of the positioning frame (11) through the adjusting seat (131), and the movable clamping bar (133b) is connected to the upper end of the inner wall of the positioning frame (11) through the elastic seat (132). The sex seat (132) is installed on the upper end of the inner wall on the other side of the positioning frame (11). The trolley (20) is located between the fixed clamp (133a) and the movable clamp (133b). The elasticity of the elastic seat (132) is used to drive the movable clamp (133b) to move horizontally closer to the fixed clamp (133a). The fixed clamp (133a) and the movable clamp (133b) are both second inclined surfaces (1331) that flare outwards on the side where their front and rear ends are close to each other.

8. The cart positioning fixture of claim 7, wherein, The upper ends of both sides of the positioning frame (11) are widened outward and respectively form mounting grooves (111). The fixed clamping bar (133a) is set in the mounting groove (111) on one side through the adjusting seat (131), and the movable clamping bar (133b) is set in the mounting groove (111) on the other side through the elastic seat (132).

9. The cart positioning fixture of claim 7, wherein, The adjusting seat (131) includes a first mounting strip (1311), multiple threaded rods (1312), and multiple nuts (1313). The first mounting strip (1311) is arranged on the corresponding side of the positioning frame (11) in the front-back direction. The first mounting strip (1311) has multiple mounting holes (13111) that pass through left and right and are spaced apart in the front-back direction. The multiple threaded rods (1312) are arranged horizontally in the left-right direction on the side of the fixed clamping bar (133a) away from the movable clamping bar (133b). The rods (1312) are spaced apart in the front-to-back direction. Multiple threaded rods (1312) correspond one-to-one with multiple mounting holes (13111). Each threaded rod (1312) passes through the corresponding mounting hole (13111). Nuts (1313) are threadedly connected to both sides of the first mounting strip (1311) on each threaded rod (1312). The nuts (1313) on both sides of the first mounting strip (1311) on each threaded rod (1312) clamp the first mounting strip (1311).

10. The cart positioning fixture of claim 7, wherein, The elastic seat (132) includes a second mounting strip (1321), an elastic element (1323), multiple sliding rods (1322), and multiple limiting elements (1324). The second mounting strip (1321) is arranged on the corresponding side of the positioning frame (11) in the front-back direction. The second mounting strip (1321) has multiple sliding holes (13211) that pass through left and right and are spaced apart in the front-back direction. The multiple sliding rods (1322) are arranged horizontally in the left-right direction on the side of the movable clamping strip (133b) away from the fixed clamping strip (133a). The multiple slide rods (1322) are distributed at intervals along the front-back direction. The multiple slide rods (1322) and the multiple slide holes (13211) correspond one-to-one. Each slide rod (1322) passes through the corresponding slide hole (13211). At least two slide rods (1322) are equipped with limit members (1324) at the end of the second mounting strip (1321) away from the movable clamping strip (133b). The elastic member (1323) is disposed between the second mounting strip (1321) and the movable clamping strip (133b).

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