Automatic clamping device for welding of vehicle-mounted oil tank

Abstract

The utility model is suitable for the technical field of oil tank clamping devices, and provides a vehicle-mounted oil tank welding automatic clamping device which comprises a base. The first servo motor is fixed on the outer wall of one side of the base through a bolt; the first ball screw is fixed at the output end of the first servo motor; the second ball screw is connected and fixed to one end of the first ball screw through a key; the first moving plate is fixed on nut seats on the first ball screw and the second ball screw through screws; the vertical plate is welded to the top of the first moving plate; the transverse plate is welded on the outer side wall of the vertical plate; the second servo motor is fixed at the central position of the outer wall of the other side of the base through a bolt; the gravity of the vehicle-mounted oil tank is used as a starting source of the automatic clamping device, follow-up automatic clamping operation can be achieved only by placing the vehicle-mounted oil tank on the transverse plate, the clamping force can be controlled, and the oil tank body is prevented from being extruded and deformed.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel tank clamping devices, and particularly relates to an automatic clamping device for welding a vehicle-mounted fuel tank. Background Art

[0002] A fuel tank is a container for storing fuel in an automobile and a special container for storing hydraulic oil or hydraulic fluid in a hydraulic system. The fuel tank can be divided into two types: an open fuel tank and a closed fuel tank.

[0003] When processing a vehicle-mounted fuel tank, the fuel tank body and the fuel tank end cover need to be welded to form a sealed fuel tank. When welding the fuel tank, a clamping device is required to hold it to ensure stability during welding. Most of the existing fuel tank clamping devices require manual operation for clamping, and the clamping force is uncontrollable. It is easy for the frame-type fuel tank body to be squeezed and deformed, and it is difficult to achieve automatic clamping operation.

[0004] Therefore, an automatic clamping device for welding a vehicle-mounted fuel tank is proposed. Content of the Utility Model

[0005] The utility model provides an automatic clamping device for welding a vehicle-mounted fuel tank, aiming to solve the above problems.

[0006] The utility model is realized as follows: an automatic clamping device for welding a vehicle-mounted fuel tank, comprising: a base; a first servo motor fixed to an outer wall of one side of the base by bolts; a first ball screw fixed to an output end of the first servo motor; a second ball screw fixed to one end of the first ball screw by key connection; a first moving plate fixed to nut seats on the first ball screw and the second ball screw by screws; a vertical plate welded to the top of the first moving plate; a horizontal plate welded to an outer wall of the vertical plate; a second servo motor fixed to a central position of an outer wall of the other side of the base by bolts; a third ball screw fixed to an output end of the second servo motor; a second moving plate fixed to a nut seat on the third ball screw by screws; a limiting plate welded to the top of the second moving plate; pressure sensors respectively embedded in the outer wall of the vertical plate, the top of the horizontal plate and the outer wall of the limiting plate; a third servo motor fixed to a central position of an outer wall of the side of the base far from the second servo motor by bolts; a fourth ball screw fixed to an output end of the third servo motor; a fuel tank cap clamping table fixed to a nut seat on the fourth ball screw by screws; a clamping cavity opened on an outer wall of the fuel tank cap clamping table; an electric push rod fixed to an outer wall of the fuel tank cap clamping table by bolts; and a pressing plate fixed to an output end of the electric push rod.

[0007] Preferably, the first moving plate, the second moving plate and the fuel tank cap clamping table are all slidably connected to the base.

[0008] Preferably, through grooves are provided at positions on the top of the base close to the outer sides of the first ball screw, the second ball screw, the third ball screw, and the fourth ball screw, and the screw threads of the screws in the first ball screw and the second ball screw have opposite helix directions.

[0009] Preferably, the vertical plate and the horizontal plate are perpendicular to each other, and the horizontal plate is horizontal with the horizontal plane.

[0010] Preferably, six electric push rods are provided, and the six electric push rods are symmetrically arranged on the outer side wall of the fuel tank cap clamping table.

[0011] Preferably, the inner bottom of the clamping cavity and the top of the horizontal plate are on the same horizontal plane.

[0012] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0013] Using the gravity of the vehicle-mounted fuel tank itself as the starting source of the automatic clamping device, the subsequent automatic clamping operation can be realized only by placing the vehicle-mounted fuel tank on the horizontal plate, and the clamping force can be controlled to avoid the fuel tank body being squeezed and deformed. By precisely and tightly docking the fuel tank end cap and the fuel tank body in the vehicle-mounted fuel tank, the quality of subsequent welding can be guaranteed, and problems such as poor welding tightness caused by loose docking or even misalignment can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the base of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the fuel tank cap clamping table of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the first moving plate of the present utility model;

[0018] Figure 5 is a schematic structural diagram of the second moving plate of the present utility model.

[0019] In the figure: 1, base; 2, first servo motor; 3, first ball screw; 4, second ball screw; 5, first moving plate; 6, vertical plate; 7, horizontal plate; 8, second servo motor; 9, third ball screw; 10, second moving plate; 11, limiting plate; 12, pressure sensor; 13, third servo motor; 14, fourth ball screw; 15, fuel tank cap clamping table; 16, clamping cavity; 17, electric push rod; 18, extrusion plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims, or drawings of this application are used to distinguish different objects and not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] An embodiment of the present utility model provides an automatic clamping device for welding an on-vehicle fuel tank, as Figures 1-5As shown in the figure, it includes a base 1. On the outer wall of one side of the base 1, a first servo motor 2 is fixedly connected by bolts. The first servo motor 2 is fixedly connected with a first ball screw 3 through the output end on its one side. One end of the first ball screw 3 far from the output end of the first servo motor 2 is fixedly connected with a second ball screw 4 by a key. The nut seats on the first ball screw 3 and the second ball screw 4 are both fixedly connected with a first moving plate 5 by screws. A vertical plate 6 is welded on the top of the first moving plate 5. A horizontal plate 7 is welded on the outer side wall of the vertical plate 6. The vertical plate 6 and the horizontal plate 7 are perpendicular to each other, and the horizontal plate 7 is horizontal with the horizontal plane. At the central position of the outer wall of the side of the base 1 adjacent to the first servo motor 2, a second servo motor 8 is fixedly connected by bolts. The second servo motor 8 is fixedly connected with a third ball screw 9 through the output end on its one side. The nut seat on the third ball screw 9 is fixedly connected with a second moving plate 10 by screws. A limiting plate 11 is welded on the top of the second moving plate 10. Pressure sensors 12 are embedded on the outer side wall of the vertical plate 6, on the top of the horizontal plate 7 and on the outer side wall of the limiting plate 11. At the central position of the outer wall of the other side of the base 1 adjacent to the first servo motor 2, a third servo motor 13 is fixedly connected by bolts. The third servo motor 13 is fixedly connected with a fourth ball screw 14 through the output end on its one side. The nut seat on the fourth ball screw 14 is fixedly connected with a fuel tank cap clamping table 15 by screws. The first moving plate 5, the second moving plate 10 and the fuel tank cap clamping table 15 are all slidably connected with the base 1. A clamping cavity 16 is formed on the outer wall of one side of the fuel tank cap clamping table 15. An electric push rod 17 is fixedly connected to the outer side wall of the fuel tank cap clamping table 15. There are six electric push rods 17 in total, and the six electric push rods 17 are symmetrically arranged on the outer side wall of the fuel tank cap clamping table 15. The electric push rod 17 is fixedly connected with a pressing plate 18 through the output end on its one side. The first servo motor 2, the second servo motor 8, the pressure sensors 12 and the third servo motor 13 are all electrically connected to an external PLC controller.

[0023] It should be noted that since most of the existing fuel tank clamping devices require manual operation for clamping, the clamping force is uncontrollable, and it is easy for the frame-type fuel tank body to be squeezed and deformed, making it difficult to achieve automatic clamping operation. In this embodiment, the gravity of the on-vehicle fuel tank itself is used as the starting source of the automatic clamping device. Just placing the on-vehicle fuel tank on the horizontal plate 7 can achieve subsequent automatic clamping operation, and the clamping force can be controlled to avoid the fuel tank body being squeezed and deformed. By precisely and tightly docking the fuel tank end cap and the fuel tank body in the on-vehicle fuel tank, the quality of subsequent welding can be guaranteed, and problems such as poor welding tightness caused by loose docking or even misalignment can be avoided.

[0024] Specifically, in this embodiment, the solution mainly includes a vertical plate 6, a horizontal plate 7, and a limiting plate 11. Before the welding operation of the vehicle fuel tank, the fuel tank body (not shown in the figure) is placed on the horizontal plate 7. After the pressure sensor 12 on the horizontal plate 7 receives the pressure of the fuel tank body, the PLC controller controls the first servo motor 2 to work. The first servo motor 2 drives the first ball screw 3 and the second ball screw 4 to rotate through the output end on one side. The first moving plates 5 on the first ball screw 3 and the second ball screw 4 move towards each other. At this time, the vertical plate 6 on the top of the first moving plate 5 moves synchronously, and the vertical plate 6 approaches the fuel tank body until the pressure sensor 12 on the vertical plate 6 contacts the fuel tank body. When the set pressure value is reached, the first servo motor 2 stops working. At this time, the fuel tank body is preliminarily clamped. The PLC controller controls the second servo motor 8 to work. The second servo motor 8 drives the third ball screw 9 to rotate through the output end on one side. The second moving plate 10 on the third ball screw 9 moves towards the fuel tank body, and the limiting plate 11 on the second moving plate 10 moves synchronously. After the pressure sensor 12 on the limiting plate 11 contacts the fuel tank body and the set pressure value is reached, the second servo motor 8 stops working, completing the clamping and limiting of the fuel tank body. Then, the fuel tank end cover (not shown in the figure) is placed inside the clamping cavity 16 on the fuel tank cover clamping table 15, and the electric push rod 17 is controlled to drive the pressing plate 18 to move through the output end on one side. After the pressing plate 18 contacts the fuel tank end cover, clamping is achieved. During welding, the third servo motor 13 is controlled to drive the fourth ball screw 14 to rotate through the output end on one side, and the fuel tank cover clamping table 15 drives the fuel tank end cover to move towards the fuel tank body. After the fuel tank end cover and the fuel tank body are in close contact, the welding operation is carried out.

[0025] In a further preferred embodiment of the present invention, as Figures 1-2 shown, through grooves are opened at the outer side positions of the top of the base 1 near the first ball screw 3, the second ball screw 4, the third ball screw 9, and the fourth ball screw 14, and the screw thread directions of the screws in the first ball screw 3 and the second ball screw 4 are opposite.

[0026] In this embodiment, the setting of the through grooves can ensure the smooth rotation of the first ball screw 3, the second ball screw 4, the third ball screw 9, and the fourth ball screw 14, and by using the first ball screw 3 and the second ball screw 4 with opposite screw thread directions, the two first moving plates 5 can move towards each other or in the opposite direction.

[0027] In a further preferred embodiment of the present invention, as Figure 1 and Figure 3 shown, the inner bottom of the clamping cavity 16 and the top of the horizontal plate 7 are on the same horizontal plane.

[0028] In this embodiment, the bottom of the fuel tank end cover and the fuel tank body can be made to be on the same horizontal plane, thereby ensuring the precise docking of the fuel tank end cover and the fuel tank body.

[0029] It should be noted that for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present utility model is not limited by the described action sequence, because according to the present utility model, certain steps may be adopted in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present utility model.

[0030] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units can have other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0031] The units described above as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0032] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions, or other adjustments to the features in the embodiments of the present utility model according to the situation without creative work, so as to obtain different technical solutions that essentially do not deviate from the concept of the present utility model. These technical solutions also fall within the scope of protection of the present utility model.

Claims

1. An automatic clamping device for welding a vehicle fuel tank, characterized in that: include: Base (1); A first servo motor (2) fixed to an outer wall of one side of the base (1) by means of bolts; A first ball screw (3) fixed to an output end of the first servo motor (2); A second ball screw (4) fixed to one end of the first ball screw (3) via a key connection; A first movable plate (5) fixed to the nut seats on the first ball screw (3) and the second ball screw (4) by screws; A vertical plate (6) welded to the top of the first movable plate (5); A horizontal plate (7) welded to the outer side wall of the vertical plate (6); A second servo motor (8) fixed by bolts at a central position of an outer wall on the other side of the base (1); a third ball screw (9) fixed to the output end of the second servo motor (8); A second movable plate (10) fixed to a nut seat on the third ball screw (9) by means of screws; A limiting plate (11) welded to the top of the second movable plate (10); Pressure sensors (12) respectively embedded in the outer wall of the vertical plate (6), the top of the horizontal plate (7) and the outer wall of the limiting plate (11); A third servo motor (13) fixed by bolts to a central position of an outer wall on a side of the base (1) away from the second servo motor (8); a fourth ball screw (14) fixed to an output end of the third servo motor (13); An oil tank cap clamping platform (15) fixed to a nut seat on the fourth ball screw (14) by means of screws; A clamping cavity (16) formed on the outer side wall of the fuel tank cap clamping platform (15); An electric push rod (17) fixed to the outer side wall of the fuel tank cover clamping platform (15) by means of bolts; A squeezing plate (18) fixed to the output end of the electric push rod (17).

2. The automatic clamping device for welding a vehicle fuel tank as claimed in claim 1, characterized in that: The first movable plate (5), the second movable plate (10) and the fuel tank cover clamping platform (15) are all slidably connected to the base (1).

3. The automatic clamping device for welding a vehicle fuel tank as claimed in claim 1, characterized in that: A through groove is provided at the top of the base (1) near the outer sides of the first ball screw (3), the second ball screw (4), the third ball screw (9) and the fourth ball screw (14); the screw threads of the first ball screw (3) and the second ball screw (4) have opposite rotation directions.

4. The automatic clamping device for welding a vehicle fuel tank as claimed in claim 1, characterized in that: The vertical plate (6) and the horizontal plate (7) are perpendicular to each other, and the horizontal plate (7) is parallel to the horizontal plane.

5. The automatic clamping device for welding a vehicle fuel tank as claimed in claim 1, characterized in that: A total of six electric push rods (17) are provided, and the six electric push rods (17) are symmetrically arranged on the outer side wall of the fuel tank cover clamping platform (15).

6. The automatic clamping device for welding a vehicle fuel tank as claimed in claim 1, characterized in that: The inner bottom of the clamping cavity (16) and the top of the transverse plate (7) are on the same horizontal plane.

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