Headlamp picking device

Abstract

The utility model discloses a headlight picking device, which relates to the technical field of automobile headlights and comprises a sorting assembly line, a movable carrier and a lifting transportation component. A plurality of stations are arranged on the sorting assembly line, a horizontal distance and / or a vertical distance are / is formed between every two adjacent stations, and each station is provided with a plurality of butt joint openings; the movable carrier is used for reciprocating along the horizontal direction among a plurality of stations; the lifting transportation assembly is movably connected to the movable carrier; the lifting transportation assembly comprises a plurality of transportation units, and each transportation unit can rotate independently; the lifting conveying assembly is used for lifting in the vertical direction so that the multiple conveying units can be in one-to-one butt joint with the multiple butt joint openings of any station and convey the headlamp parts. Through the cooperation of the movable carrier and the lifting transportation assembly, the transportation unit can move in the horizontal direction and the vertical direction, so that the transportation unit is transported to any station, and parts are conveyed to the butt joint port.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive headlights, and particularly to a headlight picking device. Background Art

[0002] Automotive headlights, also known as headlamps, refer to lighting devices installed on both sides of the front of an automobile for illuminating the road during night driving, and are also tools for emitting various vehicle driving signals.

[0003] Automotive headlights generally consist of three parts: a bulb, a reflector, and a lens. In addition, other components are also involved. Therefore, in the actual production and assembly of automotive headlights, a dedicated sorting production line is provided to complete the sorting and assembly of automotive headlights.

[0004] The existing automatic sorting and conveying operation of automotive headlights has the problem of low efficiency, and there is an urgent need for a new type of headlight picking device. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a headlight picking device, aiming to solve the problem of low efficiency in the current automatic sorting and conveying operation of automotive headlights.

[0006] To achieve the above purpose, the headlight picking device proposed by the utility model includes a sorting production line, a movable carrier, and a lifting and transporting component; there are multiple workstations on the sorting production line, and there is a horizontal distance and / or a vertical distance between two adjacent workstations, and each workstation has multiple docking ports; the movable carrier is used for reciprocating movement in the horizontal direction between multiple workstations; the lifting and transporting component is movably connected to the movable carrier; the lifting and transporting component includes multiple transporting units, and each transporting unit can rotate independently; the lifting and transporting component is used for lifting in the vertical direction so that the multiple transporting units are docked with the multiple docking ports of any one workstation one by one and transport headlight parts.

[0007] In an embodiment, there are two workstations on the sorting production line, and there is a horizontal distance and / or a vertical distance between the first workstation and the second workstation; each workstation has two types of docking ports; the lifting and transporting component includes two types of transporting units; the headlight parts include the first type of parts and the second type of parts; the first type of docking port of the first workstation transports the first type of parts to the first type of transporting unit, and the first type of transporting unit transports the first type of parts to the first type of docking port of the second workstation; the second type of docking port of the second workstation transports the second type of parts to the second type of transporting unit, and the second type of transporting unit transports the second type of parts to the second type of docking port of the first workstation.

[0008] In an embodiment, the headlight picking device further includes a tray, the tray carries the headlight parts, and the tray is placed on the sorting production line and / or the transporting unit.

[0009] In one embodiment, the docking interface includes a roller shaft and support members located at both ends of the roller shaft, and the roller shaft is rotatably connected to the support members; the roller shaft is used to support and transport the pallet; the support members of the first type of docking interface of the first station are tilted downward in the direction of the transport unit; the second type of docking interface of the second station is tilted downward in the direction of the transport unit; the support members of the second type of docking interface of the first station are tilted upward in the direction of the transport unit; the first type of docking interface of the second station is tilted upward in the direction of the transport unit.

[0010] In one embodiment, the docking port also includes a stopper and a first driver, the first driver is fixed on the support member, and the stopper is transmission-connected to the first driver; the first driver is used to drive the movable end of the stopper to move in a vertical direction to the upper surface protruding from the roller shaft; the movable end of the stopper is used to prevent the movement of the tray.

[0011] In one embodiment, the transport unit includes a conveyor belt and a second drive, and the conveyor belt is transmission-connected to the output end of the second drive; the second drive is used to drive the conveyor belt to rotate forward to receive the headlight parts from the docking port; the second drive is also used to drive the conveyor belt to reverse to transfer the headlight parts to the docking port.

[0012] In one embodiment, the movable carrier is provided with a lead screw and a third driver, the output end of the third driver is transmission connected to the lead screw, and the lead screw is arranged in the vertical direction; the lifting and transporting assembly is provided with a follower, and the follower is transmission connected to the movable part of the lead screw; the third driver is used to drive the lead screw to rotate so that the follower moves in the vertical direction.

[0013] In one embodiment, the movable carrier is provided with a plurality of first guide rails, the first guide rails are arranged in a vertical direction, a plurality of sliders are arranged around the lifting and transporting assembly, and the plurality of sliders are slidably connected to the plurality of first guide rails in a one-to-one correspondence.

[0014] In one embodiment, the movable carrier includes a mobile base and a support structure, the support structure is arranged on the mobile base, and the lifting and transporting assembly is movably connected to the support structure; a fourth drive and a rotating part are provided at the bottom of the mobile base; the fourth drive is used to drive the rotating part to rotate so that the mobile base can reciprocate in a horizontal direction between multiple workstations.

[0015] In one embodiment, the headlight picking device also includes a second guide rail, which is laid on the ground along a predetermined path, and a matching portion is provided at the bottom of the movable carrier, which slides with the second guide rail; the second guide rail is used to guide the movable carrier to move along the predetermined path, so that the movable carrier can move back and forth in a horizontal direction between multiple workstations.

[0016] The technical solution of the present utility model adopts a headlight picking device, which includes a sorting assembly line, a movable carrier, and a lifting and transporting assembly; there are multiple workstations on the sorting assembly line, and there is a horizontal distance and / or a vertical distance between two adjacent workstations, and each workstation has multiple docking ports; the movable carrier is used to reciprocate horizontally between multiple workstations; the lifting and transporting assembly is movably connected to the movable carrier; the lifting and transporting assembly includes multiple transporting units, and each transporting unit can rotate independently; the lifting and transporting assembly is used to lift vertically so that the multiple transporting units are docked with the multiple docking ports of any one workstation one by one and transport headlight parts.

[0017] The technical solution of the present utility model realizes the movement of the transporting unit in the horizontal and vertical directions by using the mutual cooperation of the movable carrier and the lifting and transporting assembly, so as to transport the transporting unit to any one workstation, so that the transporting unit can be docked with the docking port and transport headlight parts. Since the technical solution of the present utility model can control the movable carrier and the lifting and transporting assembly to move simultaneously in the horizontal and vertical directions, the transmission efficiency of the transporting unit is improved, and the setting of multiple transporting units also enables the headlight parts of the multiple docking ports on each workstation to be transported simultaneously, greatly improving the operation efficiency of automatic sorting and conveying of automotive headlights. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the structures shown in these drawings.

[0019] Figure 1 It is a schematic three-dimensional structure diagram of an embodiment of the headlight picking device provided by the present utility model;

[0020] Figure 2 It is a schematic three-dimensional structure diagram of another embodiment of the headlight picking device provided by the present utility model.

[0021] Explanation of the reference numerals in the drawings:

[0022] 1. Movable carrier; 11. Lead screw; 12. Third driver; 13. Moving base; 131. Fourth driver; 132. Rotating part; 14. Bracket structure; 2. Lifting and transporting assembly; 21. Transporting unit; 211. Conveyor belt; 3. Tray.

[0023] The realization, functional characteristics and advantages of the object of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0027] Automobile headlights, also known as headlamps, refer to lighting devices installed on both sides of the front of an automobile for illuminating the driving road at night and are also tools for emitting various vehicle driving signals.

[0028] Automobile headlights generally consist of three parts: a bulb, a reflector, and a light distribution lens. In addition, other components are also involved. Therefore, in the actual production and assembly of automobile headlights, a special sorting production line is provided to complete the sorting and assembly of automobile headlights.

[0029] There is a problem of low efficiency in the existing automatic sorting and conveying operation of automobile headlights, and there is an urgent need for a new type of automobile headlight picking device.

[0030] The present utility model proposes a headlight picking device.

[0031] Please refer to Figure 1, in an embodiment of the present utility model, the headlight picking device includes a sorting assembly line, a movable carrier 1, and a lifting and transporting assembly 2; there are multiple workstations on the sorting assembly line, and there is a horizontal spacing and / or a vertical spacing between two adjacent workstations, and each workstation has multiple docking ports; the movable carrier 1 is used for reciprocating movement in the horizontal direction between multiple workstations; the lifting and transporting assembly 2 is movably connected to the movable carrier 1; the lifting and transporting assembly 2 includes multiple transporting units 21, and each transporting unit 21 can rotate independently; the lifting and transporting assembly 2 is used for lifting in the vertical direction so that the multiple transporting units 21 are docked with the multiple docking ports of any one workstation one by one and transport headlight parts.

[0032] The technical solution of the present utility model realizes the movement of the transporting unit 21 in the horizontal and vertical directions by utilizing the mutual cooperation of the movable carrier 1 and the lifting and transporting assembly 2, so as to transport the transporting unit 21 to any one workstation, so that the transporting unit 21 is docked with the docking port and transports the headlight parts. Since the technical solution of the present utility model can control the movable carrier 1 and the lifting and transporting assembly 2 to move simultaneously in the horizontal and vertical directions, the transmission efficiency of the transporting unit 21 is improved, and the setting of multiple transporting units 21 also enables the headlight parts of multiple docking ports on each workstation to be transported simultaneously, greatly improving the automatic sorting and conveying operation efficiency of automotive headlights.

[0033] To solve the problem of the transmission requirements for different types of headlight parts between sorting assembly lines, in an embodiment of the present utility model, there are two workstations on the sorting assembly line, and there is a horizontal spacing and / or a vertical spacing between the first workstation and the second workstation; each workstation has two types of docking ports; the lifting and transporting assembly 2 includes two types of transporting units 21; the headlight parts include the first type of parts and the second type of parts; the first type of docking port of the first workstation transports the first type of parts to the first type of transporting unit, and the first type of transporting unit transports the first type of parts to the first type of docking port of the second workstation; the second type of docking port of the second workstation transports the second type of parts to the second type of transporting unit, and the second type of transporting unit transports the second type of parts to the second type of docking port of the first workstation.

[0034] In this embodiment, by allowing different docking ports of each workstation to transport different types of headlight parts, multiple types of headlight parts can run efficiently in parallel during the sorting of the sorting assembly line, improving the sorting efficiency. In addition, allowing a single docking port of each workstation to transport a single type of headlight part can avoid the mixing of the types of headlight parts transported by a single docking port, thus avoiding the phenomenon of incorrect sorting of different types of headlight parts during the transportation of the transporting unit 21 and subsequent sorting operations.

[0035] To solve the problem of how to prevent the transported parts from falling off the sorting assembly line, in an embodiment of the present utility model, please refer toFigure 1 The headlight picking device further includes a tray 3, which carries headlight parts, and the tray 3 is placed on the sorting line and / or the transport unit 21. In this way, by placing the headlight parts in the tray 3 and using the sorting line and the transport unit 21 to transport the tray 3, the problem of the headlight parts being easily separated when directly transported on the sorting line and the transport unit 21 is effectively avoided.

[0036] In order to solve the problem of how to reduce the energy consumption in the process of transmitting parts at the docking interface, in an embodiment of the utility model, the docking interface includes a roller shaft and support members located at both ends of the roller shaft, and the roller shaft is rotatably connected to the support member; the roller shaft is used to support and transmit the pallet 3; the support member of the first type of docking interface of the first station is tilted downward in the direction of the transport unit 21; the second type of docking interface of the second station is tilted downward in the direction of the transport unit 21; the support member of the second type of docking interface of the first station is tilted upward in the direction of the transport unit 21; the first type of docking interface of the second station is tilted upward in the direction of the transport unit 21.

[0037] In this embodiment, by rotatably connecting the roller shaft to the support member and tilting the support member, the tray 3 on the roller shaft can be driven to move downward in the tilted direction by its own gravity, without the need to add an additional drive device and provide drive energy, thereby saving energy consumption during the transmission process.

[0038] In order to solve the problem of how to brake the downward movement of the tray 3 along the tilting direction of the support, in the embodiment of the utility model, the docking port also includes a stopper and a first driver, the first driver is fixed on the support, and the stopper is connected to the first driver in a transmission manner; the first driver is used to drive the movable end of the stopper to move along the vertical direction to the upper surface protruding from the roller shaft; the movable end of the stopper is used to prevent the movement of the tray 3. In this way, by controlling the start and stop of the first driver, the first driver drives the stopper so that the movable end of the stopper moves to the upper surface protruding from the roller shaft and prevents the movement of the tray 3, effectively avoiding the problem that the tray 3 moves too fast and hits other headlight parts on the sorting line. Among them, the stopper and the first driver can be driven by a synchronous belt; or the first driver can be connected to the stopper in rotation through a rotating shaft, and the specific transmission connection method is not limited here. The first driver can use one of a variety of drive devices such as a stepping motor and a servo motor, which is not limited here.

[0039] Furthermore, in order to prevent the tray 3 from directly hitting the stopper when the speed is too fast, causing damage to the headlight parts in the tray 3 and damage to the stopper, in the embodiment of the utility model, a plurality of stoppers and a plurality of first drivers can be arranged at intervals along the extension direction of the support member, and each set of stoppers and first drivers can independently control and stop the tray 3. In this way, the tray 3 can be stopped by one set of stoppers and the first driver every time it accelerates a short distance under the action of the gravity component, thereby preventing the tray 3 from obtaining an excessively fast speed, and further preventing the headlight parts and the stopper in the tray 3 from being damaged.

[0040] In order to solve the problem of how the transport unit 21 transports the parts, in the embodiment of the present utility model, please refer to Figure 1 The transport unit 21 includes a conveyor belt 211 and a second driver, and the conveyor belt 211 is transmission-connected to the output end of the second driver; the second driver is used to drive the conveyor belt 211 to rotate forward to receive the headlight parts from the docking port; the second driver is also used to drive the conveyor belt 211 to rotate reversely to transmit the headlight parts to the docking port.

[0041] In this embodiment, a belt-driven transmission scheme using a conveyor belt 211 is adopted; since belt drive has the characteristics of simple structure, stable transmission, and buffering and vibration absorption, a second driver is used to drive the conveyor belt 211 to transmit the headlight parts, so that the headlight parts can be smoothly transmitted. In addition, even if there is a small height difference between the docking interface and the transport unit 21, the buffering and vibration absorption characteristics of the conveyor belt 211 can prevent the headlight parts from being violently impacted when they descend along the height difference, thereby preventing the headlight parts from being damaged. Among them, the second driver can be one of a variety of drive devices such as a stepper motor, a servo motor, etc., which is not limited here.

[0042] In order to solve the problem of how to realize the lifting and lowering of the lifting and transporting assembly 2, in the embodiment of the present utility model, please refer to Figure 1 and Figure 2 The movable carrier 1 is provided with a lead screw 11 and a third driver 12. The output end of the third driver 12 is transmission-connected with the lead screw 11, and the lead screw 11 is arranged in the vertical direction. The lifting and transporting assembly 2 is provided with a follower, and the follower is transmission-connected with the movable part of the lead screw 11. The third driver 12 is used to drive the lead screw 11 to rotate so that the follower moves in the vertical direction.

[0043] In this embodiment, the lifting and lowering of the lifting and transporting assembly 2 is realized by the transmission scheme of the lead screw 11. Since the transmission of the lead screw 11 has the characteristics of high transmission accuracy, high transmission efficiency, and low friction loss, it is suitable for lifting and lowering the lifting and transporting assembly 2, so that the lifting and transporting assembly 2 can be accurately lifted to a predetermined height, ensuring that the transport unit 21 can be smoothly docked with the docking port. Among them, the driven member can be set as a nut, and the lifting and lowering of the lifting and transporting assembly can be realized by the transmission of the lead screw 11 nut. The third driver 12 can adopt one of a variety of driving devices such as a stepping motor, a servo motor, etc., which is not limited here. The transmission connection between the lead screw 11 and the output end of the third driver 12 can be realized by a gear transmission method.

[0044] In order to solve the problem that the lead screw 11 is tilted during the transmission process, causing the lifting and transporting assembly 2 to deviate from the predetermined lifting path, in the embodiment of the utility model, the movable carrier 1 is provided with a plurality of first guide rails, the first guide rails are arranged in the vertical direction, and a plurality of sliders are arranged around the lifting and transporting assembly 2, and the plurality of sliders are slidably connected to the plurality of first guide rails one by one. In this way, by arranging the first guide rails arranged in the vertical direction on the movable carrier 1, and allowing the sliders of the lifting and transporting assembly 2 to be slidably connected to the first guide rails, a guiding effect is provided for the lifting and lowering of the lifting and transporting assembly 2, and the lifting and transporting assembly 2 is prevented from deviating from the predetermined lifting path, thereby ensuring the transmission accuracy of the parts.

[0045] In order to solve the problem of how to realize the movement of the movable carrier 1, in the embodiment of the present utility model, please refer to Figure 1 and Figure 2 The movable carrier 1 includes a movable base 13 and a support structure 14, the support structure 14 is arranged on the movable base 13, and the lifting and transporting assembly 2 is movably connected to the support structure 14; the bottom of the movable base 13 is provided with a fourth driver 131 and a rotating part 132; the fourth driver 131 is used to drive the rotating part 132 to rotate, so that the movable base 13 can reciprocate in the horizontal direction between multiple stations. In this way, the movement control of the movable carrier 1 is realized by controlling the operation of the fourth driver 131. Among them, the fourth driver 131 can adopt one of a variety of driving devices such as a stepping motor, a servo motor, etc., which is not limited here.

[0046] In order to avoid the problem that the movable carrier 1 deviates from the predetermined moving path after multiple reciprocating movements, in an embodiment of the utility model, the headlight picking device also includes a second guide rail, which is laid on the ground along the predetermined path, and a matching portion is provided at the bottom of the movable carrier 1, which slides with the second guide rail; the second guide rail is used to guide the movable carrier 1 to move along the predetermined path, so that the movable carrier 1 can reciprocate in the horizontal direction between multiple workstations.

[0047] In this embodiment, by laying a second guide rail along a predetermined path on the ground and ensuring that the cooperation of the movable vehicle 1 does not slide with the second guide rail, since the second guide rail guides the reciprocating movement of the movable vehicle 1, the movable vehicle 1 can move along the predetermined path, avoiding deviation from the predetermined path.

[0048] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A headlight picking device, characterized in that, The headlight picking device comprises: A sorting line, wherein the sorting line has a plurality of workstations, a horizontal spacing and / or a vertical spacing is provided between two adjacent workstations, and each of the workstations has a plurality of docking ports; A movable carrier, the movable carrier being used to reciprocate in a horizontal direction between the plurality of workstations; A lifting and transporting assembly, wherein the lifting and transporting assembly is movably connected to the movable carrier; the lifting and transporting assembly comprises a plurality of transporting units, each of which can rotate independently; the lifting and transporting assembly is used to lift and lower in a vertical direction so that the plurality of transporting units can dock one by one with the plurality of docking ports of any one of the workstations and transfer the headlight parts.

2. The headlight picking device according to claim 1, wherein, The sorting line has two workstations, and there is a horizontal spacing and / or a vertical spacing between the first workstation and the second workstation; Each of the workstations has two types of docking ports; the lifting and transporting assembly includes two types of transporting units; the headlight parts include first type parts and second type parts; The first type of docking port of the first workstation transports the first type of parts to the first type of transport unit, and the first type of transport unit transports the first type of parts to the first type of docking port of the second workstation; The second type of docking port of the second workstation transports the second type of parts to the second type of transport unit, and the second type of transport unit transports the second type of parts to the second type of docking port of the first workstation.

3. The headlight picking device according to claim 2, characterized in that, The headlight picking device further comprises a tray, the tray carrying the headlight parts, and the tray is placed on the sorting line and / or the transport unit.

4. The headlight picking device according to claim 3, characterized in that, The docking port includes a roller shaft and support members located at both ends of the roller shaft, and the roller shaft is rotatably connected to the support members; the roller shaft is used to support and transport the tray; The support member of the first type of the docking interface of the first workstation is arranged obliquely downward toward the direction of the transport unit; the second type of the docking interface of the second workstation is arranged obliquely downward toward the direction of the transport unit; The supporting member of the second type of the docking interface of the first workstation is arranged obliquely upward toward the direction of the transport unit; and the first type of the docking interface of the second workstation is arranged obliquely upward toward the direction of the transport unit.

5. The headlight picking device according to claim 4, characterized in that, The docking port further includes a stopper and a first driver, the first driver is fixed on the support member, and the stopper is in transmission connection with the first driver; The first driver is used to drive the movable end of the stopper to move in a vertical direction to a position protruding from the upper surface of the roller shaft; the movable end of the stopper is used to prevent the tray from moving.

6. The headlight picking device according to claim 1, characterized in that, The transport unit comprises a conveyor belt and a second driver, wherein the conveyor belt is drivingly connected to an output end of the second driver; The second driver is used to drive the conveyor belt to rotate forward to receive the headlight parts from the docking port; The second driver is further used for driving the conveyor belt to reverse, so as to transfer the headlight parts to the docking port.

7. The headlight picking device according to claim 1, characterized in that, The movable vehicle is provided with a lead screw and a third driver, the output end of the third driver is in transmission connection with the lead screw, and the lead screw is arranged in the vertical direction; The lifting and transporting assembly is provided with a follower, and the follower is in transmission connection with the movable part of the lead screw; The third driver is used to drive the lead screw to rotate so that the follower moves in the vertical direction.

8. The headlight picking device according to claim 7, characterized in that, The movable vehicle is provided with a plurality of first guide rails, the first guide rails are arranged in the vertical direction, and a plurality of sliders are arranged around the lifting and transporting assembly, and the plurality of sliders are slidably connected to the plurality of first guide rails in one-to-one correspondence.

9. The headlight picking device according to claim 1, wherein, The movable vehicle includes a moving base and a support structure, the support structure is arranged on the moving base, and the lifting and transporting assembly is movably connected to the support structure; The bottom of the moving base is provided with a fourth driver and a rotating part; the fourth driver is used to drive the rotating part to rotate so that the moving base reciprocates horizontally between the plurality of workstations.

10. The headlight picking device according to any one of claims 1 to 9, characterized in that, The headlight picking device further includes a second guide rail, the second guide rail is laid on the ground along a predetermined path, and a matching part is arranged at the bottom of the movable vehicle, and the matching part is slidably matched with the second guide rail; The second guide rail is used to guide the movable vehicle to move along the predetermined path so that the movable vehicle reciprocates horizontally between the plurality of workstations.

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