Combined AGV chain tensioning device

Abstract

The combined AGV chain tensioning device comprises a tensioning piece, a trigger device and a telescopic reciprocating mechanism which are connected in sequence, the trigger device comprises a fixed block and a sliding block, a first cavity and a second cavity which are communicated through a first through groove are formed in the fixed block, a limiting groove is formed in the second cavity, and the telescopic reciprocating mechanism is arranged in the limiting groove. A second through groove communicated with the limiting groove is formed in the fixing block, the sliding block is limited in the second cavity and slides in the extending direction of the second cavity, a triggering protrusion and a connecting rod are arranged at the two ends of the sliding block respectively, the triggering protrusion penetrates through the first through groove to be located in the first cavity, and a tightness detection switch is arranged in the first cavity; the connecting rod sequentially penetrates through the limiting groove and the through groove to be located on the outer side of the fixing block, the connecting rod is sleeved with a reset spring, one end of the reset spring abuts against the outer wall of the sliding block, the other end of the reset spring abuts against the groove wall of the limiting groove, the tensioning piece is fixed to the connecting rod, and the telescopic end of the telescopic reciprocating mechanism is connected with the fixing block.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing equipment, and in particular to an assembled AGV chain tensioning device. Background Art

[0002] AGV is an automatic guided vehicle, also known as an automatic guided transporter or an automatic guided transporter. With the development of science and technology and the continuous increase in labor costs, automated logistics technology has been widely developed in the manufacturing industry and other fields. Among them, AGV is widely used in the automotive manufacturing industry, especially in the field of automobile assembly. AGV provides a series of solutions for realizing the automation of automobile manufacturing, saving manpower and improving efficiency.

[0003] However, in the automobile assembly operation, when the rear suspension mechanism is assembled with the vehicle body, the vehicle body clamp will lift the vehicle body to be assembled to the assembly area, and the AGV lifting mechanism in the assembly area will lift the rear suspension mechanism upward from the bottom of the rear suspension mechanism. Since the vehicle body and the vehicle body clamp are only in a supporting relationship, when the lifting mechanism is lifted upward, it needs to overcome the shock-absorbing spring force of the rear suspension, which will cause the shock-absorbing spring force of the rear suspension to be large, thereby lifting the vehicle body suspended on the vehicle body clamp, causing the vehicle body to be separated from the clamp due to being lifted, which poses a safety risk and affects the automobile assembly operation. In order to solve this problem, a steel chain is usually used to tighten the vehicle body downward so that the vehicle body and the clamp fit tightly, preventing the vehicle body from being lifted by the lifting mechanism during the assembly operation, causing the vehicle body to be separated from the clamp and fall, thereby avoiding the occurrence of safety accidents. A hook and a mounting seat for fixing and providing tension are respectively provided at both ends of the steel chain.

[0004] At present, due to considerations of production cost, production efficiency, and full utilization of resources, the mainstream practice for the same automobile assembly line is usually to produce multiple different types of models at the same time. Different types of models usually have different wheelbases and sizes. Therefore, the position of the locating hole on the body used to connect the steel chain for tensioning is different from the straight-line distance for fixing the steel chain mounting seat on the AGV, which makes the length of the tensioning steel chain used for tensioning different types of models different, and it is necessary to prepare more chains of different lengths.

[0005] The following disadvantages exist when using a chain of fixed length for pulling: (1) One chain can only correspond to one type of vehicle, or can only correspond to different vehicle models by changing the fixed position. Frequent switching of models requires a lot of production time, which affects production efficiency. This leads to reduced efficiency. (2) There are many types of vehicle models, and manual operation and installation are complicated when switching models. Due to frequent chain replacement, workers need to identify the chain when operating. Experienced workers are required to quickly identify the chain before operating. This requires a high level of proficiency for the workers, and manual visual identification is prone to errors. It is easy to make mistakes when using chains of different lengths to correspond to different models. Once an error occurs, it will cause great loss of life and property, with a high risk and poor safety. (3) The chain length is complicated to adjust, and the vehicle body cannot be tightened. There is a certain amount of shaking, and the tightening effect is not obvious, which poses a safety risk. (4) Since the chain length is fixed, it is inconvenient to disassemble and assemble the chain, which is complicated, further reducing production efficiency and increasing the assembly production cost of the vehicle. Summary of the invention

[0006] Based on this, it is necessary to provide a combined AGV chain tensioning device.

[0007] In order to solve the above technical problems, the present invention provides a combined AGV chain tensioning device, comprising a tensioning member, a trigger device and a telescopic reciprocating mechanism connected in sequence, the trigger device comprising a fixed block and a slider, the fixed block is provided with a first chamber and a second chamber which are connected through a first through groove, the second chamber is provided with a limiting groove, the fixed block is provided with a second through groove which is connected through the limiting groove, the slider is limited to slide in the second chamber along the extension direction of the second chamber, a trigger protrusion and a connecting rod are respectively provided at both ends of the slider, the trigger protrusion passes through the first through groove and is located in the first chamber, a looseness detection switch is provided in the first chamber, the connecting rod passes through the limiting groove and the through groove in sequence and is located outside the fixed block, a reset spring is sleeved on the connecting rod, one end of the reset spring is in conflict with the outer wall of the slider, and the other end is in conflict with the groove wall of the limiting groove, the tensioning member is fixed to the connecting rod, and the telescopic end of the telescopic reciprocating mechanism is connected to the fixed block.

[0008] Preferably, the telescopic reciprocating mechanism comprises a telescopic device and a guide bracket, the telescopic device is fixed on the guide bracket, and the end of the telescopic rod of the telescopic device is connected to the fixed block of the trigger device.

[0009] Preferably, the guide bracket includes an upper sliding seat and a lower fixed plate, the upper sliding seat is provided with a guide rod, the extension direction of the guide rod is the same as the telescopic direction of the telescopic device, the telescopic device is fixed to the lower fixed plate, the lower fixed plate is provided with a guide hole, the upper end of the guide rod is fixed to the upper sliding seat, and the other end is inserted into the guide hole in an aligned manner, the guide rod slides in the guide hole, the end of the telescopic rod of the telescopic device is fixed to the upper sliding seat, and the fixed block is connected to the upper sliding seat.

[0010] Preferably, the telescopic device is provided with a first position detection switch and a second position detection switch, the extension direction of the line connecting the first position detection switch and the second position detection switch is the same as the extension direction of the guide rod, and the guide rod is respectively provided with a first detection block and a second detection block, the position of the first detection block corresponds to the position of the first position detection switch, and the position of the second detection block corresponds to the position of the second position detection switch.

[0011] Preferably, it also includes a controller, a control switch and a power supply, and the tightness detection switch, the telescopic device, the first position detection switch, the second position detection switch, the power supply and the control switch are all electrically connected to the controller.

[0012] Preferably, the telescopic device is any one of an electric cylinder, a servo push rod, a pneumatic cylinder, and an oil cylinder.

[0013] Preferably, it further comprises a base, the first end of the telescopic device is hingedly fixed to the base, the second end of the telescopic device is connected to the tensioning member through the trigger device, and the telescopic device is rotatably connected to the base.

[0014] Preferably, the tensioning member is any one of a flexible steel cable, a flexible rope and a flexible chain.

[0015] Preferably, a hook assembly is provided at one end of the tensioning member away from the telescopic device, the telescopic device is connected to the base via a hinge, one end of the hinge is rotatably connected to the base, and the other end is rotatably connected to the telescopic device.

[0016] Preferably, one end of the hinge is provided with two opposite mounting plates, and pin holes are opened on the mounting plates. The bottom end of the telescopic device is rotatably connected with a pin column, and the two ends of the pin column are respectively inserted into the two pin holes. The other end of the hinge away from the mounting plates is provided with a protrusion, and the protrusion is provided with an axial hole. A rotating shaft is inserted into the axial hole, and the rotating shaft is rotatably connected to the base.

[0017] Beneficial effects of the present invention: The present invention designs an AGV chain tensioning device for assembly, sets a sensor, detects the tensioning degree of the tensioning member through a trigger device, and realizes automatic change of the chain length through a tensioning telescopic device, thereby realizing the universal use of the tensioning device when assembling different types of vehicles, ensuring that the vehicle body and the gripping device are always in a tensioned state during the assembly operation, thereby improving the operation efficiency, and at the same time, avoiding the problem caused by the loose state of the tensioning member due to the shaking of the frame or the impact of the lifting mechanism during the assembly operation, thereby eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0019] Figure 1 It is a structural schematic diagram of a steel chain used in the prior art;

[0020] Figure 2 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0021] Figure 3 A partial cross-sectional schematic diagram of a preferred embodiment of the present invention;

[0022] Figure 4 It is a cross-sectional schematic diagram of the trigger device in the relaxed state of the preferred embodiment of the present invention; Figure 5 It is a cross-sectional schematic diagram of the trigger device in the tensioned state according to the preferred embodiment of the present invention;

[0023] In the figure: tensioning member 1; upper sliding seat 2; guide rod 3; lower fixed plate 4; telescopic device 5; fixed block 6; slider 7; return spring 8; first chamber 61; second chamber 62; first through slot 63; limit slot 64; second through slot 65; trigger protrusion 71; connecting rod 72; tension detection switch 9; first position detection switch 10; second position detection switch 11; first detection block 12; second detection block 13; hook assembly 14; hinge 16. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0025] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] refer to Figure 1 A combined AGV chain tensioning device comprises a tensioning member 1, a trigger device and a telescopic reciprocating mechanism connected in sequence, the trigger device is connected to the telescopic end of the telescopic reciprocating mechanism, the tensioning member 1 is a chain, the trigger device comprises a fixed block 6 and a slider 7, the fixed block 6 is provided with a first chamber 61 and a second chamber 62 which are connected through a first through groove 63, the second chamber 62 is provided with a limiting groove 64, the fixed block 6 is provided with a second through groove 65 which is connected with the limiting groove 64, the shape of the slider 7 matches the cross-sectional shape of the second chamber 62, so that the slider 7 can slide in a straight line in the second chamber 62, and the slider 7 is limited in the second chamber 62 along the The slider 7 slides in the extension direction of the second chamber 62, and the two ends of the slider 7 are respectively provided with a trigger protrusion 71 and a connecting rod 72, the trigger protrusion 71 passes through the first through slot 63 and is located in the first chamber 61, and a tension detection switch 9 is provided in the first chamber 61, and the connecting rod 72 passes through the limit slot 64 and the through slot 65 in sequence and is located outside the fixed block 6, and a reset spring 8 is sleeved on the connecting rod 72, one end of the reset spring 8 conflicts with the outer wall of the slider 7, and the other end conflicts with the groove wall of the limit slot 64, the tensioning member 1 is connected to the connecting rod 72, and the telescopic end of the telescopic reciprocating mechanism is connected to the fixed block 6. Through the tension detection switch 9 of the trigger device, the tension detection switch signal is identified to control the tension of the chain, realize the automatic change of the overall length of the tensioning device, and ensure that the vehicle body and the holding device are always in a tensioned state during the assembly operation, improve the operation efficiency, and eliminate safety hazards.

[0028] When the tensioning member 1 is in a relaxed state, the tensioning member 1 has no pulling force on the connecting rod 72, or the pulling force of the tensioning member 1 on the connecting rod 72 is less than the elastic force of the reset spring 8. At this time, the slider 7 slides to the end of the second chamber 62 close to the tension detection switch 9 under the elastic force of the reset spring 8, and the tension detection switch 9 detects a signal, thereby triggering the tension detection switch 9. After receiving the signal, the telescopic end of the telescopic reciprocating mechanism retracts and shortens, thereby shortening the total length of the tensioning device until there is no signal from the tension detection switch 9, indicating that the tensioning member 1 is already in a tensioned state.

[0029] refer to Figure 1In a preferred embodiment, the telescopic reciprocating mechanism includes a telescopic device 5 and a guide bracket, the telescopic device 5 is fixed on the guide bracket, the end of the telescopic rod of the telescopic device 5 is connected to the fixed block 6 of the trigger device, and the telescopic device 5 drives the fixed block 6 to move on the guide bracket, thereby changing the total length of the tensioning device to achieve the tensioning effect.

[0030] refer to Figure 1 In a preferred embodiment, the guide bracket includes an upper sliding seat 2 and a lower fixed plate 4, the upper sliding seat 2 is provided with a guide rod 3, the extension direction of the guide rod 3 is the same as the telescopic direction of the telescopic device 5, the telescopic device 5 is fixed on the lower fixed plate 4, and a guide hole is provided on the lower fixed plate 4, the upper end of the guide rod 3 is fixed to the upper sliding seat 2, and the lower end is aligned and inserted into the guide hole, the guide rod 3 can slide in the guide hole, the telescopic rod end of the telescopic device 5 is fixed to the upper sliding seat 2, and the fixed block 6 is connected to the upper sliding seat 2.

[0031] When the telescopic rod of the telescopic device 5 is extended, the telescopic rod of the telescopic device 5 drives the upper sliding seat 2 to move toward the tensioning member 1, and the guide rod 3 fixed to the upper sliding seat 2 slides synchronously in the guide hole, so that the total length of the tensioning device becomes longer.

[0032] refer to Figure 1In a preferred embodiment, the telescopic device 5 is provided with a first position detection switch 10 and a second position detection switch 11, the extension direction of the line connecting the first position detection switch 10 and the second position detection switch 12 is the same as the extension direction of the guide rod 3, and the guide rod 3 is provided with a first detection block 13 and a second detection block 14, respectively, the position of the first detection block 13 corresponds to the position of the first position detection switch 10, and the position of the second detection block 14 corresponds to the position of the second position detection switch 11. The first detection block 13 and the second detection block 14 are respectively located at the extreme positions of extension and shortening of the telescopic device 5. When the telescopic rod of the telescopic device 5 is extended to the limit position, the guide rod 3 moves with the upper sliding seat 2 and the fixed block 6 toward the direction close to the tensioning member 1. At this time, the first detection block 13 on the guide rod 3 moves to face the first position detection switch 10 provided on the telescopic device 5, and the first position detection switch 10 detects a signal; when the telescopic rod of the telescopic device 5 is retracted to the limit position, the guide rod 3 moves with the upper sliding seat 2 and the fixed block 6 toward the direction away from the tensioning member 1. At this time, the second detection block 14 on the guide rod 3 moves to face the position of the second position detection switch 11 provided on the telescopic device 5, and the second detection block 14 detects a signal. Preferably, the telescopic device 5 is a cylinder. The first position detection switch 10 and the first detection block 13 are used to detect that the telescopic rod of the telescopic device 5 is extended to the limit state, that is, the initial state; the second position detection switch 11 and the second detection block 14 are used to detect that the telescopic rod of the telescopic device 5 is extended to the limit state. When the second position detection switch 11 is directly opposite to the second detection block 14, the telescopic rod of the telescopic device 5 is extended to the limit state, thereby preventing the telescopic rod from being extended beyond the limit state.

[0033] refer to Figure 1 In a preferred embodiment, a controller, a control switch and a power supply are further included, and the tightness detection switch 9, the telescopic device 5, the first position detection switch 10, the second position detection switch 11, the power supply and the control switch are all electrically connected to the controller. The first position detection switch 10, the second position detection switch 11 and the tightness detection switch 9 are all sensors.

[0034] refer to Figure 1 In a preferred embodiment, the telescopic device 5 is any one of an electric cylinder, a servo push rod, a pneumatic cylinder, and an oil cylinder.

[0035] refer to Figure 1In a preferred embodiment, a base is further included, the first end of the telescopic device 5 is hingedly fixed to the base, the second end of the telescopic device 5 is connected to the tensioning member 1 through the trigger device, and the telescopic device 5 is rotatably connected to the base. The base is a fixed base on the AGV, and the tensioning device of the present application is fixed on the base, fixed to the AGV through the base, and configured as an AGV chain tensioning device, or the tensioning device of the present application is directly fixed to the AGV.

[0036] refer to Figure 1 In a preferred embodiment, the tensioning member 1 is any one of a flexible steel cable, a flexible rope and a flexible chain.

[0037] refer to Figure 1 In a preferred embodiment, a hook assembly is provided at one end of the tensioning member 1 away from the telescopic device 5, and the telescopic device 5 is connected to the base through a hinge 16, one end of the hinge 16 is rotatably connected to the base, and the other end is rotatably connected to the telescopic device 5.

[0038] refer to Figure 1 In a preferred embodiment, two opposite mounting plates are provided at one end of the hinge, pin holes are provided on the mounting plates, a pin column is rotatably connected to the bottom end of the telescopic device, both ends of the pin column are respectively inserted into the two pin holes, a protrusion is provided at the other end of the hinge away from the mounting plates, an axial hole is provided on the protrusion, a rotating shaft is inserted into the axial hole, and the rotating shaft is rotatably connected to the base.

[0039] Working mode: When the tensioning piece 1 is in a loose state, the tension detection switch 9 has a signal. When the tensioning piece 1 is in a tensioned state, the tension detection switch 9 has no signal.

[0040] When the tensioning device is in use, the telescopic device 5 is extended, so that the guide rod 3 moves, thereby driving the first detection block 12 to move to the first position detection switch 10. The first position detection switch 10 detects a signal. At this time, the total length of the tensioning device is the longest. The operator connects the hook assembly 14 to the automobile process hole and presses the control switch to start. The telescopic device begins to retract, and the upper sliding seat 2 moves in the direction of the fixed block 6. The upper sliding seat 2 fixed to the telescopic rod of the telescopic device moves, thereby driving the guide rod 3 to move. Until there is no signal from the tension detection switch 9, it means that the tensioning member 1 is already in a stretched state and stops retracting.

[0041] During the use of the tensioning device, if the chain becomes loose due to frame shaking or lifting mechanism impact, the tensioning member 1 tension detection switch 9 will have a signal, and the telescopic device will automatically start and retract until the tension detection switch 9 stops without a signal.

[0042] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0044] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A combined AGV chain tensioning device, characterized in that: It includes a tensioning member, a trigger device and a telescopic reciprocating mechanism connected in sequence, the trigger device includes a fixed block and a slider, the fixed block is provided with a first chamber and a second chamber which are connected through a first through groove, the second chamber is provided with a limiting groove, the fixed block is provided with a second through groove which is connected through the limiting groove, the slider is limited to slide in the second chamber along the extension direction of the second chamber, a triggering protrusion and a connecting rod are respectively provided at both ends of the slider, the triggering protrusion passes through the first through groove and is located in the first chamber, a looseness detection switch is provided in the first chamber, the connecting rod passes through the limiting groove and the through groove in sequence and is located outside the fixed block, a reset spring is sleeved on the connecting rod, one end of the reset spring is in conflict with the outer wall of the slider, and the other end is in conflict with the groove wall of the limiting groove, the tensioning member is fixed to the connecting rod, and the telescopic end of the telescopic reciprocating mechanism is connected to the fixed block.

2. The tensioning device according to claim 1, characterized in that: The telescopic reciprocating mechanism comprises a telescopic device and a guide bracket, the telescopic device is fixed on the guide bracket, and the end of the telescopic rod of the telescopic device is connected to the fixed block of the trigger device.

3. The tensioning device according to claim 2, characterized in that: The guide bracket includes an upper sliding seat and a lower fixed plate, the upper sliding seat is provided with a guide rod, the extension direction of the guide rod is the same as the telescopic direction of the telescopic device, the telescopic device is fixed to the lower fixed plate, the lower fixed plate is provided with a guide hole, the upper end of the guide rod is fixed to the upper sliding seat, and the other end is inserted into the guide hole in an aligned manner, the guide rod slides in the guide hole, the end of the telescopic rod of the telescopic device is fixed to the upper sliding seat, and the fixed block is connected to the upper sliding seat.

4. The tensioning device according to claim 3, characterized in that: The telescopic device is provided with a first position detection switch and a second position detection switch, the extension direction of the line connecting the first position detection switch and the second position detection switch is the same as the extension direction of the guide rod, and the guide rod is respectively provided with a first detection block and a second detection block, the position of the first detection block corresponds to the position of the first position detection switch, and the position of the second detection block corresponds to the position of the second position detection switch.

5. The tensioning device according to claim 4, characterized in that: It also includes a controller, a control switch and a power supply. The tightness detection switch, the telescopic device, the first position detection switch, the second position detection switch, the power supply and the control switch are all electrically connected to the controller.

6. The tensioning device according to claim 1, characterized in that: The telescopic device is any one of an electric cylinder, a servo push rod, a pneumatic cylinder and an oil cylinder.

7. The tensioning device according to claim 1, characterized in that: It also includes a base, the first end of the telescopic device is hinged and fixed to the base, the second end of the telescopic device is connected to the tensioning member through the trigger device, and the telescopic device is rotatably connected to the base.

8. The tensioning device according to claim 7, characterized in that: The tensioning member is any one of a flexible steel cable, a flexible rope and a flexible chain.

9. The tensioning device according to claim 1, characterized in that: A hook assembly is provided at one end of the tensioning member away from the telescopic device. The telescopic device is connected to the base via a hinge. One end of the hinge is rotatably connected to the base, and the other end is rotatably connected to the telescopic device.

10. The tensioning device according to claim 9, characterized in that One end of the hinge is provided with two opposite mounting plates, and pin holes are opened on the mounting plates. The bottom end of the telescopic device is rotatably connected with a pin column, and the two ends of the pin column are respectively inserted into the two pin holes. A protrusion is provided at the other end of the hinge away from the mounting plates, and an axial hole is opened on the protrusion. A rotating shaft is inserted into the axial hole, and the rotating shaft is rotatably connected to the base.

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