Accurate positioning device for track

Abstract

The utility model discloses an accurate positioning device for a track. Comprising a track, a positioning plate, a first trigger piece, an air cylinder and a first groove-shaped photoelectric switch, the positioning plate and the first trigger piece are fixed to the track, the air cylinder and the first groove-shaped photoelectric switch are arranged on a skip car, the positioning plate and the first trigger piece are arranged at stations of the track respectively, the top end of a telescopic head of the air cylinder is a conical head, and a centering notch is formed in the positioning plate; a slope surface is arranged at a notch at the upper end of the centering notch, and the diameter of an inner hole of the centering notch corresponds to the diameter of a rod body of a telescopic head of the air cylinder. According to the utility model, the first groove-type photoelectric switch and the first trigger sheet are used for carrying out preliminary positioning on the skip car when the skip car runs on the track, after the preliminary positioning is completed, the conical head on the air cylinder is inserted into the centering notch, and the telescopic head of the air cylinder is inserted into the notch of the centering notch by means of guiding between the conical head and the slope surface; and the offset skip car is forced to move to correct the deviation after preliminary positioning, so that the overall positioning is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of track positioning, in particular to a track precision positioning device. Background Art

[0002] As we all know, automated production workshops often feature assembly lines, with a transfer vehicle installed along them. This vehicle is positioned between processing equipment and moves along tracks, shuttling back and forth between the various processing equipment to transfer materials throughout the entire assembly line. When the transfer vehicle reaches each processing equipment, it relies on a positioning device to help it stop at the appropriate location.

[0003] At present, the most commonly used positioning device in the workshop is based on the combination of a slot-type photoelectric switch and a trigger sheet. After the transfer material cart reaches the corresponding position, it relies on the induction between the trigger sheet and the slot-type photoelectric switch to stop at the work station. However, this positioning device is prone to distance errors during the positioning process, especially the inertial offset generated by the transfer material cart when it receives the stop command, or because the slot-type photoelectric switch detects a range area, it may be sensed as soon as it touches, or it may be sensed only when it moves to the middle of the sensing area, or it may be sensed at the end of the sensing area. It is most accurate only when it is sensed in the middle of the sensing area. However, in actual use, there will be more or less displacement errors, and the error is within 1 cm. This error will be affected when the transfer material cart is feeding or receiving materials. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a track precision positioning device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A precise track positioning device comprises a track, a positioning plate and a first trigger piece fixed on the track, and a cylinder and a first slot-shaped photoelectric switch arranged on a trolley. The positioning plate and the first trigger piece are respectively set up at each workstation of the track. The top of the telescopic head of the cylinder is a conical head. A centering slot is provided on the positioning plate. The upper end slot of the centering slot is provided with a slope surface. The inner hole diameter of the centering slot corresponds to the rod diameter of the telescopic head of the cylinder, so that the rod of the telescopic head of the cylinder can just pass through the centering slot.

[0007] Preferably, a second trigger piece is fixed on the track and a second slot-type photoelectric switch is fixed on the trolley. The second trigger piece is installed on each workstation of the track. The number of second trigger pieces on each workstation of the track is at least one. The number of second trigger pieces set at a single workstation is defined as N, and the number of second slot-type photoelectric switches is equal to the maximum value of N.

[0008] Preferably, the track is provided with a transverse plate at each workstation, the first trigger piece and the second trigger piece are both mounted on the transverse plate, and the first slot-type photoelectric switch and the second slot-type photoelectric switch are arranged side by side on the side of the trolley.

[0009] Preferably, the cylinder is arranged at the bottom of the trolley.

[0010] Due to the adoption of the above-mentioned scheme, the utility model is based on relying on the first slot-shaped photoelectric switch and the first trigger piece to perform preliminary positioning of the trolley during track travel. After completing the preliminary positioning, the conical head on the cylinder is inserted into the centering slot. Relying on the guidance between the conical head and the slope surface, the telescopic head of the cylinder is inserted into the slot of the centering slot, forcing the offset trolley to move, so as to correct the deviation after the preliminary positioning, so that the overall positioning will be more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0012] Figure 2 It is a partial structural diagram of an embodiment of the present utility model.

[0013] Figure 3 It is a schematic structural diagram between the cylinder and the centering notch of an embodiment of the present utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0016] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0017] like Figures 1 to 3 As shown, the present embodiment provides a track precision positioning device, comprising a track 100, a positioning plate 1 and a first trigger piece 2 fixed on the track 100, and a cylinder 3 and a first slot-shaped photoelectric switch 4 arranged on the trolley 200, wherein the positioning plate 1 and the first trigger piece 2 are respectively set at each workstation of the track 100, the top of the telescopic head 31 of the cylinder 3 is a conical head, and a centering slot 11 is provided on the positioning plate 1, and the upper end slot of the centering slot 11 is provided with a slope surface 12, and the inner hole diameter of the centering slot 11 corresponds to the rod diameter of the telescopic head 31 of the cylinder 3, so that the rod of the telescopic head 31 of the cylinder 3 can just pass through the centering slot 11.

[0018] This embodiment is mainly based on relying on the first slot-shaped photoelectric switch 4 and the first trigger piece 2 to perform preliminary positioning of the trolley during track travel. After completing the preliminary positioning, the conical head on the cylinder 3 is inserted into the centering slot 11. Relying on the guidance between the conical head and the slope surface 12, the telescopic head 31 of the cylinder 3 is inserted into the slot of the centering slot 11, forcing the offset trolley 200 to move, so as to correct the deviation after the preliminary positioning, so that the overall positioning will be more accurate.

[0019] During the specific positioning work, the trolley moves on the track 100. When the first slot-shaped photoelectric switch 4 and the first trigger piece 2 are inductively coupled, the trolley 200 stops. After the trolley 200 stops, the cylinder 3 works and extends the telescopic head 31 of the cylinder 3. At this time, regardless of whether there is a deviation or how much the deviation is, within the maximum deviation value of 1CM, the telescopic head 31 of the cylinder 3 is at the upper end of the centering slot 11. If there is a deviation, the top of the telescopic head 31 is directly opposite the slope surface 12. When there is no deviation, it is just located at the center of the slot of the centering slot 11. Therefore, after the telescopic head 31 of the cylinder 3 is inserted, if there is a deviation, it will rely on the guidance between the conical head at the top of the telescopic head 31 and the slope surface 12 to slowly center, so that the telescopic head 31 is inserted into the centering slot 11. After the telescopic head 31 is inserted into the centering slot 11, the precise positioning between the trolley 200 and the workstation is completed.

[0020] Furthermore, since there will be many workstations on the track 100, in order to facilitate the system to know which workstation to move to, the second trigger piece 5 is fixed on the track 100 of this embodiment and the second slot-type photoelectric switch 6 is fixed on the trolley 200. The second trigger piece 5 is installed on each workstation of the track 100. The number of second trigger pieces 5 on each workstation of the track 100 is at least one. The number of second trigger pieces 5 set at a single workstation is defined as N, and the number of the second slot-type photoelectric switches 6 is equal to the maximum value of N. As for how the system relies on the second trigger piece 5 and the second slot-type photoelectric switch 6 to know the work station, N=4 is used as an example to illustrate. For example, there is only one second trigger piece 5 at the first to fourth work stations, but the positions of the second trigger piece 5 are different. The second trigger piece 5 at the first work station is located on the leftmost side, and the second, third, and fourth work stations are changed in position in sequence so that the fourth work station is located on the rightmost side. In this way, the four second slot-type photoelectric switches 6 are used for detection respectively. If detected, the system marks it as "1", and if not detected, it is marked as "0". Then, for the first four work stations, there will be "1000", "0100", "0010", and "0001". "1000" represents work station number one, "0100" represents work station number two, "0010" represents work station number three, and "0001" represents work station number four. When used to represent workstations number five to seven, a second trigger piece 5 needs to be added. In workstations number five to seven, one of the first trigger pieces is located at the far left and remains unchanged, while the other piece is changed in position. After detection, "1100", "1010", and "1001" will appear to represent workstation number five, six, and seven, respectively. Subsequently, one of the second trigger pieces 5 is located in the second position, and the other is in the third and fourth positions respectively, so that "0110" and "0101" will appear, and these two are used to represent workstation number eight and nine. Then the first second trigger piece 5 is moved to the third position, and "0011" will appear to represent workstation number ten. Similarly, one piece will continue to be added to the subsequent workstations until all four second trigger pieces 5 are full. In this way, each workstation has a number, and the system will directly know which workstation is being moved.

[0021] Furthermore, with respect to the installation of the trigger piece and the cylinder 3 in this embodiment, the track 100 of this embodiment is provided with a transverse plate 7 at each work station, the first trigger piece 2 and the second trigger piece 5 are both installed on the transverse plate 7, the first slot-type photoelectric switch 4 and the second slot-type photoelectric switch 6 are arranged side by side on the side of the material cart 200, so as to facilitate detection and assembly, and the cylinder 3 is arranged at the bottom of the material cart 200, which is mainly used to hide the cylinder 3, achieve an aesthetic effect, and reduce the lateral volume.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A track precision positioning device, characterized by: It includes a track, a positioning plate and a first trigger piece fixed on the track, and a cylinder and a first slot-shaped photoelectric switch arranged on the material car. The positioning plate and the first trigger piece are respectively set up at each workstation of the track. The top of the telescopic head of the cylinder is a conical head. The positioning plate is provided with a centering slot. The upper end slot of the centering slot is provided with a slope surface. The inner hole diameter of the centering slot corresponds to the rod diameter of the telescopic head of the cylinder, so that the rod of the telescopic head of the cylinder can just pass through the centering slot.

2. A track precision positioning device according to claim 1, characterized in that: A second trigger piece is fixed on the track and a second slot-type photoelectric switch is fixed on the trolley. The second trigger piece is installed on each workstation of the track. The number of second trigger pieces on each workstation of the track is at least one. The number of second trigger pieces set at a single workstation is defined as N, and the number of second slot-type photoelectric switches is equal to the maximum value of N.

3. A track precision positioning device according to claim 2, characterized in that: The track is provided with a transverse plate at each workstation, the first trigger piece and the second trigger piece are both installed on the transverse plate, and the first slot-type photoelectric switch and the second slot-type photoelectric switch are arranged side by side on the side of the material car.

4. A track precision positioning device according to claim 3, characterized in that: The cylinder is arranged at the bottom of the trolley.

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