Electric push rod traction hook of automatic guide vehicle

Abstract

The utility model relates to the technical field of traction devices, in particular to an electric push rod traction hook of an automatic guide vehicle, which comprises an electric push rod body, a buffer component arranged on one side of the output end of the electric push rod body, a hook body arranged on one side of the buffer component far away from the electric push rod body, and air resistance components symmetrically arranged on the front side and the rear side of the buffer component. The buffering assembly comprises a first buffering seat close to one side of the electric push rod body and a second buffering seat close to the hook body, the first buffering seat is fixedly connected with the output end of the electric push rod body, and the hook body is fixedly installed at the end, away from the first buffering seat, of the second buffering seat. The buffer assembly can absorb impact loads during traction start and stop and butt joint with the dragged equipment, the hook body or the dragged equipment is prevented from being damaged by rigid impact, the air resistance assembly can provide auxiliary buffering for the buffer assembly, the buffering effect is enhanced through the air damping effect, and the traction stability is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a traction device technical field, concretely is a kind of electric push rod traction hook of automatic guided vehicle. BACKGROUND

[0002] In the present, automatic guided vehicle (AGV) has become the core equipment of production circulation system in various industries with flexible and efficient material transfer capacity, and in its operation, automatic guided vehicle needs to realize stable connection with different specifications load trolley by traction device, and then achieve efficient material transfer, and electric push rod traction hook as the key component of automatic guided vehicle traction device, its stability is directly related to the overall operation efficiency and safety reliability of automatic guided vehicle and load trolley;

[0003] In the automatic guided vehicle traction operation, when automatic guided vehicle moves to traction position, drive hook is close to and interfaces with the hanger ring of the towed part, and due to the influence of hanger ring position deviation, electric push rod extension speed fluctuation and the like, rigid collision between hook and hanger ring is easy to occur;

[0004] And traditional hook is mostly rigid connection structure, without buffer component or only with simple spring (poor elasticity, insufficient damping), so it is difficult to effectively absorb collision energy, and collision force is directly applied to hook and hanger ring, which is easy to cause deformation of hook body, surface wear and even cracking of hanger ring, thereby shortening the service life of component, therefore, the electric push rod traction hook of automatic guided vehicle is proposed for the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an electric push rod traction hook of automatic guided vehicle to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] An electric push rod traction hook of automatic guided vehicle, comprising an electric push rod body, a buffer component is arranged on one side of the output end of the electric push rod body, a hook body is arranged on the side of the buffer component away from the electric push rod body, air resistance components are symmetrically arranged on the front and back sides of the buffer component, the buffer component comprises a first buffer seat on the side close to the electric push rod body and a second buffer seat close to the hook body, the first buffer seat is fixedly connected with the output end of the electric push rod body, the hook body is fixedly installed on one end of the second buffer seat away from the first buffer seat, mounting grooves are formed on one side of the opposite surfaces of the first buffer seat and the second buffer seat, and a guide telescopic rod and a buffer spring are arranged between the first buffer seat and the second buffer seat.

[0008] As the further optimization of the utility model, wherein: the buffer spring is sleeved on the outer side of the guide telescopic rod, and two ends of the guide telescopic rod are fixedly connected with the mounting grooves of the first buffer seat and the second buffer seat respectively.

[0009] As the further optimization of the utility model, wherein: the inner diameter of the mounting groove is equal to the diameter of the buffer spring, and two ends of the buffer spring are fixedly connected with the mounting grooves of the first buffer seat and the second buffer seat respectively.

[0010] As the further optimization of the utility model, wherein: the first buffer seat and the second buffer seat are coaxially arranged with the output end of the electric push rod body, and the guide telescopic rod and the buffer spring are coaxially arranged with the first buffer seat and the second buffer seat.

[0011] As the further optimization of the utility model, wherein: the air resistance assembly comprises a buffer air bag, the buffer air bag is located on the two sides of the buffer assembly, buffer supporting plates are fixedly connected on the two sides of the first buffer seat and the second buffer seat, and two ends of the buffer air bag are fixedly connected with adjacent buffer supporting plates.

[0012] As the further optimization of the utility model, wherein: a flow limiting plate is arranged at the center of the inner cavity of the buffer air bag, and the outer side of the flow limiting plate is fixedly connected with the inner side of the buffer air bag.

[0013] As the further optimization of the utility model, wherein: a plurality of flow limiting holes are formed in the flow limiting plate, the flow limiting holes are in the shape of a circular truncated cone with one end being large and the other end being small, the large end of the flow limiting hole is close to the first buffer seat, and the small end of the flow limiting hole is close to the second buffer seat.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] In the utility model, the buffer assembly can absorb the impact load when the towing start-stop and the docking with the towed equipment, so as to avoid the rigid impact damage to the hook body or the towed equipment, the air resistance assembly can provide auxiliary buffering for the buffer assembly, the buffering effect is enhanced through the gas damping effect, the buffer assembly and the air resistance assembly can form a composite buffering system of "spring buffering plus air resistance damping", and the towing stability is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an overall structure schematic view of the utility model;

[0017] Figure 2 It is a rear structure schematic view of the utility model;

[0018] Figure 3 It is a structure schematic view of the buffer assembly of the utility model;

[0019] Figure 4 is a sectional view of the buffer assembly of the utility model;

[0020] Figure 5 is a structural exploded view of the buffer assembly of the utility model;

[0021] Figure 6 is a sectional view of the buffer gas bag of the utility model;

[0022] Figure 7 is a sectional view of the flow limiting plate of the utility model.

[0023] In the figure: 1, electric push rod body; 2, buffer assembly; 21, first buffer seat; 22, second buffer seat; 23, installation groove; 24, guide telescopic rod; 25, buffer spring; 26, buffer support plate; 3, hook body; 4, air resistance assembly; 41, buffer gas bag; 42, flow limiting plate; 43, flow limiting hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0026] Please refer to Figures 1-7 The utility model provides a technical scheme:

[0027] The utility model provides an electric push rod traction hook of an automatic guided vehicle, comprising an electric push rod body 1, a buffer assembly 2 is arranged on one side of the output end of the electric push rod body 1, a hook body 3 is arranged on the side of the buffer assembly 2 away from the electric push rod body 1, gas resistance assemblies 4 are symmetrically arranged on the front and back sides of the buffer assembly 2, the buffer assembly 2 comprises a first buffer seat 21 close to one side of the electric push rod body 1 and a second buffer seat 22 close to the hook body 3, the first buffer seat 21 is fixedly connected with the output end of the electric push rod body 1, the hook body 3 is fixedly installed on one end of the second buffer seat 22 away from the first buffer seat 21, mounting grooves 23 are formed on the opposite sides of the first buffer seat 21 and the second buffer seat 22, and a guide telescopic rod 24 and a buffer spring 25 are arranged between the first buffer seat 21 and the second buffer seat 22.

[0028] It should be noted that the electric push rod body 1 is driven by a direct-current permanent magnet motor, is adapted to a conventional power supply system of an automatic guided vehicle, is adapted to a high-frequency start-stop working scene of the automatic guided vehicle, the buffer assembly 2 serves as a force transmission transition structure of the electric push rod body 1 and the hook body 3, and the core function is to absorb impact load during traction start-stop and docking with a towed device, so as to avoid rigid impact damage to the hook body 3 or the towed device, the connection surfaces of the output end of the electric push rod body 1 and the hook body 3 are designed in a plane, force transmission is uniform, the hook body 3 is a traction execution component, the fixed connection of the hook body 3 and the buffer assembly 2 ensures that there is no relative displacement during traction, and the connection strength is high, and the gas resistance assemblies 4 serve as auxiliary buffer structures of the buffer assembly 2, are symmetrically arranged on the front and back sides of the buffer assembly 2, the buffer effect is enhanced through the gas damping effect, especially for high-frequency, small-amplitude impact load (such as vibration impact generated by the running bump of the automatic guided vehicle), a composite buffer system of "spring buffer plus gas resistance damping" can be formed with the buffer assembly 2, and the traction stability is further improved;

[0029] As a further implementation of the scheme, the buffer spring 25 is sleeved outside the guide telescopic rod 24, the two ends of the guide telescopic rod 24 are fixedly connected with the mounting grooves 23 of the first buffer seat 21 and the second buffer seat 22 respectively, the inner diameter of the mounting groove 23 is equal to the diameter of the buffer spring 25, and the two ends of the buffer spring 25 are fixedly connected with the mounting grooves 23 of the first buffer seat 21 and the second buffer seat 22 respectively;

[0030] It should be noted that the mounting groove 23 serves as a mounting reference of the guide telescopic rod 24 and the buffer spring 25, is formed in the center position of the opposite faces of the first buffer seat 21 and the second buffer seat 22, is in the form of a cylindrical blind hole (the hole diameter is adapted to the diameter of the buffer spring 25), can limit the radial displacement of the guide telescopic rod 24 and the buffer spring 25, and ensures that the guide telescopic rod 24 and the buffer spring 25 are coaxial at all times;

[0031] Further, the design ensures that the extension and retraction direction of the buffer spring 25 is consistent with the guide telescopic rod 24 through the coaxial structure of the "rod sleeve spring", avoiding lateral deviation of the buffer spring 25. The outer diameter of the guide telescopic rod 24 is smaller than the inner diameter of the buffer spring 25, which does not affect the extension and retraction of the buffer spring 25, and can also limit the buffer spring 25 in the radial direction. The installation groove 23 ensures that the two ends of the buffer spring 25 can be tightly embedded, and the two ends of the buffer spring 25 are fixed with the installation groove 23, preventing the buffer spring 25 from being separated from the first buffer seat 21 and the second buffer seat 22 during high-frequency buffering, and further improving the structural stability.

[0032] As a further implementation of the present scheme, the first buffer seat 21 and the second buffer seat 22 are coaxially arranged with the output end of the electric push rod body 1, and the guide telescopic rod 24 and the buffer spring 25 are coaxially arranged with the first buffer seat 21 and the second buffer seat 22.

[0033] It should be noted that the coaxial design is the key to ensure uniform force transmission and avoid local stress concentration, so that the pushing force / pulling force of the electric push rod body 1 can be uniformly transmitted along the axis to the hook body 3 without radial component, avoiding deformation of the first buffer seat 21, the second buffer seat 22 or the hook body 3 due to uneven stress. At the same time, the coaxial design can ensure uniform compression / rebound of the buffer spring 25, consistent stress on each spring coil, prolong the service life of the buffer spring 25, and avoid early fracture of the buffer spring 25 due to excessive local stress.

[0034] As a further implementation of the present scheme, the air resistance assembly 4 includes a buffer air bag 41, the buffer air bag 41 is located on both sides of the buffer assembly 2, the first buffer seat 21 and the second buffer seat 22 are fixedly connected with buffer support plates 26 on both sides, the two ends of the buffer air bag 41 are fixedly connected with the adjacent buffer support plates 26, a flow limiting plate 42 is arranged at the center of the inner cavity of the buffer air bag 41, the outer side of the flow limiting plate 42 is fixedly connected with the inner side of the buffer air bag 41, a plurality of flow limiting holes 43 are arranged on the flow limiting plate 42, the flow limiting holes 43 are arranged in a circular truncated cone shape with one end large and one end small, the large end of the flow limiting hole 43 is close to the first buffer seat 21, and the small end of the flow limiting hole 43 is close to the second buffer seat 22.

[0035] It should be noted that: the buffer air bag 41 is made of butyronitrile rubber material, filled with compressed air inside, and achieves damping and buffering through the compression and expansion of the gas, which adapts to the buffering needs of different weight towed parts. The buffering support plate 26 is the installation carrier of the buffer air bag 41, which is fixed on the front and back sides of the first buffering seat 21 and the second buffering seat 22 (perpendicular to the side of the first buffering seat 21 and the second buffering seat 22) by welding. The flow limiting plate 42 is the damping adjustment core of the buffer air bag 41, which is fixed in the center of the inner cavity of the buffer air bag 41, and divides the buffer air bag 41 into two air cavities (equal in volume) on the left and right. Its function is to limit the flow speed of the gas between the two air cavities, thereby generating damping force. The edge of the flow limiting plate 42 is tightly attached to the inner wall of the buffer air bag 41, ensuring that the gas can only flow through the flow limiting hole 43 without leakage.

[0036] Further, the flow limiting hole 43 serves as a gas flow channel, and the asymmetric design of the circular truncated cone shape makes the flow resistance of the gas different in different buffering directions. When the buffering assembly 2 is compressed, the gas flows from the air cavity near the second buffering seat 22 (small end side) to the air cavity near the first buffering seat 21 (large end side). Because the small end aperture is small, the gas flow resistance is large, and the damping force is strong, which can quickly absorb the starting impact. When the buffering assembly 2 rebounds, the gas flows from the air cavity near the first buffering seat 21 (large end side) to the air cavity near the second buffering seat 22 (small end side). The flow resistance is small, and the damping force is weak, which can avoid the secondary impact caused by the rebounding too fast, and achieve the precise buffering effect of "strong damping at start - weak damping at stop".

[0037] Workflow: According to the position of the towed part, move the automatic guided vehicle to the towing position, issue instructions through the control system of the automatic guided vehicle, start the electric push rod body 1, drive the output end telescopic rod to extend along the axial direction, drive the first buffering seat 21 to move synchronously, and then drive the hook body 3 to approach the hanging ring of the towed part through the buffering assembly 2 (guiding telescopic rod 24, buffering spring 25). During this process, the guiding telescopic rod 24 limits the first buffering seat 21 and the second buffering seat 22 to move only in the axial direction, avoiding the radial deviation of the hook body 3, ensuring the precise alignment of the opening of the hook body 3 with the hanging ring, and at the same time, the buffering spring 25 maintains the initial compression force, preparing for the subsequent docking impact.

[0038] When the opening of the hook body 3 is sleeved into the towing ring, the electric push rod body 1 is temporarily stopped from extending, and then stable docking is realized, so that the risk of slipping during towing is avoided; rigid collision is prone to occur when the hook body 3 is docked with the towing ring, at this time, the core functions of the buffer assembly 2 and the air resistance assembly 4 are highlighted, and the buffer assembly 2 is not only for the bumping during towing, the collision force drives the second buffer seat 22 of the buffer assembly 2 to move towards the first buffer seat 21, at the same time, the guide telescopic rod 24 and the buffer spring 25 are extruded, the buffer spring 25 is compressed through the extrusion of the second buffer seat 22 in response to the collision force, and the collision energy is absorbed by the elastic deformation of the buffer spring 25, so that the peak value of the collision force is reduced, and deformation, scratches or cracks of the hook body 3 and the towing ring caused by rigid impact are avoided;

[0039] At the same time, the two side buffer branch plates 26 extrude the buffer air bag 41 to make the side air cavity close to the second buffer seat 22, so that the gas in the air cavity flows slowly to the other side air cavity through the flow limiting hole 43 (from the small end to the large end), and the gas flow speed is controlled due to the damping effect of the flow limiting hole 43, so that the damping force is formed, the instantaneousness of the collision impact is further weakened, and the damage of the hook body 3 and the towing ring caused by high-intensity impact in a short time is avoided, so that the docking process is safe and stable.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electric push rod traction hook for an automated guided vehicle, comprising an electric push rod body (1), characterized in that: The output end of the electric push rod body (1) is provided with a buffer assembly (2), and the side of the buffer assembly (2) away from the electric push rod body (1) is provided with a hook body (3). The front and rear sides of the buffer assembly (2) are symmetrically provided with air resistance assemblies (4). The buffer assembly (2) includes a first buffer seat (21) near the electric push rod body (1) and a second buffer seat (22) near the hook body (3). The first buffer seat (21) is fixedly connected to the output end of the electric push rod body (1). The hook body (3) is fixedly installed on the end of the second buffer seat (22) away from the first buffer seat (21). The first buffer seat (21) and the second buffer seat (22) are provided with mounting grooves (23) on opposite sides. A guide telescopic rod (24) and a buffer spring (25) are provided between the first buffer seat (21) and the second buffer seat (22). The air resistance assembly (4) includes a buffer airbag (41), which is located on both sides of the buffer assembly (2). Both sides of the first buffer seat (21) and the second buffer seat (22) are fixedly connected to buffer support plates (26). The two ends of the buffer airbag (41) are fixedly connected to the adjacent buffer support plates (26). A flow-limiting plate (42) is provided at the center of the inner cavity of the buffer airbag (41). The outer side of the flow-limiting plate (42) is adapted to the inner side of the buffer airbag (41) and fixedly connected. The flow limiting plate (42) is provided with a plurality of flow limiting holes (43). The flow limiting holes (43) are frustum-shaped with one end larger than the other. The larger end of the flow limiting hole (43) is close to the first buffer seat (21), and the smaller end of the flow limiting hole (43) is close to the second buffer seat (22).

2. The electric push rod traction hook of an automated guided vehicle according to claim 1, characterized in that: The buffer spring (25) is sleeved on the outside of the guide telescopic rod (24), and the two ends of the guide telescopic rod (24) are fixedly connected to the mounting grooves (23) of the first buffer seat (21) and the second buffer seat (22), respectively.

3. The electric push rod traction hook of an automated guided vehicle according to claim 1, characterized in that: The inner diameter of the mounting groove (23) is equal to the diameter of the buffer spring (25), and the two ends of the buffer spring (25) are fixedly connected to the mounting groove (23) of the first buffer seat (21) and the second buffer seat (22), respectively.

4. The electric push rod traction hook of an automated guided vehicle according to claim 1, characterized in that: The first buffer seat (21) and the second buffer seat (22) are both coaxially arranged with the output end of the electric push rod body (1), and the guide telescopic rod (24) and the buffer spring (25) are both coaxially arranged with the first buffer seat (21) and the second buffer seat (22).

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