CN101618491A - Method for assembling pedestal of overhead cell support of hybrid vehicle and clamp thereof - Google Patents

Abstract

The invention discloses a welding fixture for a base frame of a top-mounted battery rack of a hybrid electric vehicle, which comprises a clamp body (1). The connection plates (12) at both ends of the body and the side wing connection plates (13) arranged outside the body are characterized in that the upper end of the clamp body is fixedly provided with a positioning element (2), and the positioning element (2) has a horizontal limit base The frame body (11) and the wing connecting plate (13), the outer side of the end connecting plate (12) is provided with a clamping device (3), and the clamping device clamps the two end connecting plates (12) and the end The base frame body (11) arranged between the connecting plates (12). The fixture greatly reduces the physical labor of the operator, improves the assembly and welding efficiency; controls or eliminates the welding deformation of the workpiece due to heat, and reduces the instability of manual welding.

Description

Assembly method and jig used for the base frame of the top-mounted battery rack of a hybrid electric vehicle

technical field

The invention belongs to the technical field of assembly and production of a base frame of a top-mounted battery rack of a hybrid electric vehicle, and in particular relates to an assembly production method of a base frame of a top-mounted battery rack of a hybrid electric vehicle, and a used welding fixture.

Background technique

Hybrid Electric Vehicle (Hybrid Electric Vehicle) is to install an internal combustion engine on a pure electric vehicle, the purpose of which is to reduce the pollution of the car and increase the mileage of the pure electric vehicle. There are two types of hybrid vehicles, series and parallel. Hybrid vehicles have the following advantages: when the vehicle starts and stops, it is only driven by the generator, and the engine does not work until it reaches a certain speed. Therefore, the engine can always be kept in the best working condition, with good power and low emissions. Low, and the source of electric energy is the engine, just need to refuel.

Series power is composed of engine, generator and motor. The SHEV power unit system is formed in series. The engine drives the generator to generate electricity. The electric energy is transmitted to the battery or motor through the controller, and the motor passes through the transmission Drive the car. When the load is small, the battery drives the motor to drive the wheels, and when the load is heavy, the engine drives the generator to generate electricity to drive the motor. When the vehicle is in the working conditions of starting, accelerating, and climbing, the engine, the motor group and the battery pack jointly provide electric energy to the motor; When the battery pack is short of power, the engine-generator set charges the battery pack. The tandem structure is suitable for frequent starting and low-speed operating conditions in the city. The engine can be adjusted to run stably near the optimum operating point, and the vehicle speed can be adjusted by adjusting the output of the battery and electric motor. The engine avoids idling and low-speed operating conditions, thereby improving the efficiency of the engine and reducing exhaust emissions. But its disadvantage is that the energy is converted several times and the mechanical efficiency is low.

The engine and the electric motor of the parallel device drive the car together. The engine and the electric motor belong to two sets of systems, which can provide torque to the car drive train independently, and can be driven together or independently on different road surfaces. When the car accelerates uphill, the electric motor and engine can simultaneously provide power to the transmission mechanism. Once the car speed reaches the cruising speed, the car will only rely on the engine to maintain the speed. The motor can be used as both a motor and a generator, also known as a motor-generator set. Since there is no separate generator, the engine can directly drive the wheels through the transmission mechanism. This device is closer to the traditional car drive system, and its mechanical efficiency loss is similar to that of ordinary cars, so it is widely used.

Regardless of whether it is series power or parallel power, or the more emerging hybrid power at this stage, the use and design of batteries is the top priority of hybrid vehicles. As the main energy storage element of hybrid electric vehicles, batteries have a direct impact on the performance of hybrid electric vehicles. In the prior art, hybrid vehicles are often provided in the form of a battery pack. In order to allow the battery pack to work better and prevent the influence of temperature and other factors, a battery box baffle is often provided in the prior art to place and limit the battery. Group, the air inlet and outlet are designed on the battery box baffle to maintain the heat dissipation effect.

However, the production of battery racks in the prior art is generally completed by manual welding. In this case, the welding quality is unstable, the welding accuracy is not high, and due to manual operation, more manpower and material resources are required, which brings difficulties to the mechanization and automation of production. At this stage, it is necessary to provide welding equipment with higher quality and better performance for welding production, so as to realize the mechanization and automation of welding production, reduce the interference of human factors, ensure the stability of welding quality, and improve labor productivity. Just because there are these problems in the welding production of the battery rack in the prior art, the present invention comes from it.

Contents of the invention

The purpose of the present invention is to provide a welding jig for the base frame of the top-mounted battery rack of a hybrid electric vehicle, which solves the problem of manual welding of the top-mounted battery rack of a hybrid electric vehicle in the prior art, which has unstable welding quality, low welding precision, and cannot be automated and mechanization issues.

In order to solve these problems in the prior art, the technical solution provided by the invention is:

A welding jig for a base frame of an overhead battery rack of a hybrid electric vehicle, comprising a clamp body. The outer side wing connecting plate is characterized in that the upper end of the clamp body is fixedly provided with a positioning element, the positioning element horizontally limits the base frame body and the side wing connecting plate, and a clamping device is arranged on the outside of the end connecting plate. The clamping device clamps the two end connecting plates and the base frame body arranged between the end connecting plates.

Preferably, the base frame body includes two base frame beams and an intermediate support plate disposed between the two base frame beams, and the intermediate support plate is welded and fixed to the base frame beams.

Preferably, the clamp body includes a horizontal support platform, and the support platform is respectively fixed with the positioning element and the clamping device; the lower end of the support platform is fixed with a support bracket for casters.

Preferably, the positioning element includes two limiting plates oppositely arranged on the supporting platform, a horizontal clamping device fixed on the supporting platform is arranged on the outside of the limiting plates, and the horizontal clamping device pushes the limiting plate to be positioned horizontally Base frame body.

Preferably, a positioning block is provided on the outside of the limiting plate, and the positioning block is screwed to the limiting plate, and locking holes for locking the wing connecting plate and the end connecting plate are provided on the limiting plate and the positioning block.

Preferably, the clamping device includes a horizontal quick clamp arranged on the inner side of the limit plate to clamp the connecting plates at both ends and the base frame body, and a second clamping device for clamping the connecting plates at the ends and the beam of the base frame in a vertical direction. A tightening device and a second tightening device for vertically clamping the side wing connecting plate and the base frame beam.

Preferably, the horizontal quick clamp is fixedly connected to the limit plate, and the lower end of the base frame beam is padded with a spacer.

Preferably, the base frame body is also provided with a plurality of locking plates perpendicular to the base frame beam, and the locking plates are provided with locking grooves that are engaged with the base frame beam.

Preferably, the horizontal clamping device and the horizontal quick clamp are selected from horizontal quick clamps, push-pull quick clamps, pull-type quick clamps, and multifunctional welding combination clamps; the first screwing device, the second screwing The clamping device is selected from vertical clamps.

Another object of the present invention is to provide a method for assembling and producing a base frame of a top-mounted battery rack of a hybrid electric vehicle, which is characterized in that the method includes the following steps:

Install the base frame body on the welding fixture; the welding fixture fixes the wing connecting plate and clamps it through a horizontal clamping device, and the two ends of the base frame body and the end connecting plate are clamped and positioned; the base frame The lower end of the body is padded with pads;

Weld and fix the connection between the base frame body and the end connection plate and the connection between the base frame body and the side wing connection plate.

By designing such a welding fixture, the present invention positions the two components of the base frame beam and the middle support plate through positioning elements, and can obtain accurate assembly positions without marking or measuring, thus ensuring assembly accuracy and speeding up assembly The progress of the job.

The clamping device of the present invention is a fast clamping and quick opening mechanism designed by using the principle of mechanical four-bar dead point. According to its movement mode, it can be divided into manual clamping device and pneumatic clamping device, including vertical clamping device, horizontal clamping device, push-pull clamping device, pull buckle clamping device, multifunctional welding combination clamping device series, large pliers, C-type pliers, F-type pliers, etc. Preferably a push-pull clamping device is used.

Compared with the solutions in the prior art, the utility model has the advantages of:

1. In the technical solution of the present invention, welding fixtures are used to weld and fix the base frame of the battery rack of the hybrid electric vehicle. The clamping device can be a manual clamping device or a pneumatic clamping device, thereby greatly reducing the physical labor of the operator and improving the assembly efficiency. welding efficiency. Moreover, during the welding process, since the workpiece is clamped and fixed in the fixture or anti-deformed in advance, the welding heat deformation of the workpiece can be controlled or eliminated, and the instability of manual welding can be reduced. The welding process is also a process of local heating of the weldment. In order to reduce the thermal deformation of the assembled parts, the parts are clamped by the fixture, which is beneficial to reduce the dimensional instability of the welding.

2. In the technical solution of the present invention, the welding fixture is used for welding. Since the assembly accuracy is guaranteed and the welding deformation is controlled, the base frame of the battery rack of the hybrid electric vehicle obtained in the present invention can be interchanged arbitrarily in subsequent assembly, reducing the risk of product mismatch. incidence. The mechanical processing elements such as matching holes on the end plate can be changed from welding first and then processing to processing into holes and then welding, which avoids the problem of difficult processing of parts after welding, and is conducive to shortening the production cycle of workpiece products.

3. In the technical solution of the present invention, after the welding fixture is used to fix the parts, the welding displacement machine can be used to shorten the time for the welding parts to be turned and displaced during the assembly and welding process, reduce the auxiliary time, and improve the utilization rate of the welding machine and welding productivity. The use of welding displacement machinery can make the weldment be welded in a more favorable welding position such as horizontal or ship-shaped position, which is conducive to the operation of the operator, which is conducive to ensuring the welding quality, giving full play to the welding efficiency, and even expanding the welding capacity of the welding machine. scope.

4. In the technical solution of the present invention, after welding with welding jigs, the manual operation is changed to mechanical operation, which reduces the influence of human factors on the welding quality, reduces the requirements for the welder's operating technical level, and concentrates assembly and welding in one working place. It can be completed on one position, which reduces the number of processes and saves the area of the production workshop. The use of welding fixtures makes it possible to mechanize and automate the welding process, thereby ensuring the overall size and manufacturing accuracy of the weldment.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Fig. 1 is the three-dimensional view of the welding tool and fixture of the base frame of the top battery rack of the hybrid electric vehicle according to the embodiment of the present invention;

Fig. 2 is a schematic structural view of the body parts of the base frame base frame of the hybrid electric vehicle top battery rack according to the embodiment of the present invention;

Fig. 3 is a schematic structural view of the connecting plate components at the end of the base frame of the top battery rack of the hybrid electric vehicle according to the embodiment of the present invention;

Fig. 4 is a schematic structural view of the connecting plate components of the side wing of the top battery rack base frame of the hybrid electric vehicle according to the embodiment of the present invention;

Fig. 5 is a three-dimensional schematic diagram of the assembly and welding state of the base frame components of the roof battery rack of the hybrid electric vehicle on the welding fixture according to the embodiment of the present invention;

Fig. 6 is a front view of the assembled and welded state of the base frame components of the roof battery rack of the hybrid electric vehicle in the embodiment of the present invention on the welding fixture;

Fig. 7 is a bottom view of the assembled and welded state of the base frame components of the hybrid electric vehicle roof battery rack on the welding fixture according to the embodiment of the present invention;

Fig. 8 is a right side view of the assembled and welded state of the base frame components of the roof battery rack of the hybrid electric vehicle in the embodiment of the present invention on the welding fixture;

Fig. 9 is a schematic diagram of the structure of the base frame of the battery rack mounted on the top of the hybrid electric vehicle according to the embodiment of the present invention obtained after welding.

Among them: 1 is the clamp body, 2 is the positioning element, and 3 is the clamping device;

11 is the base frame body, 12 is the end connection plate; 13 is the side wing connection plate; 14 is the support platform, 15 is the caster, and 16 is the support bracket;

21 is a limiting plate; 22 is a horizontal clamping device; 23 is a positioning block; 24 is a locking hole; 25 is a pad; 26 is a clamping plate, and 27 is a clamping groove;

31 is a horizontal fast clamp; 32 is a first tightening device; 33 is a second tightening device; 111 is a base frame beam; 112 is an intermediate support plate.

Detailed ways

The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present invention and not to limit the scope of the present invention. The implementation conditions used in the examples can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not indicated are usually the conditions in routine experiments.

Embodiment As shown in Figure 1, it is a welding fixture for the base frame of a hybrid electric vehicle top battery rack, including a clamp body 1, as shown in Figures 2 to 4, the hybrid electric vehicle top battery rack base frame includes a base frame body 11 1. The connecting plates 12 at both ends of the body end and the side wing connecting plates 13 arranged on the outside of the body, the upper end of the clamp body is fixedly provided with a positioning element 2, and the positioning element 2 horizontally limits the base frame body 11 and the side wing connection plate 13 , a clamping device 3 is provided on the outside of the end connecting plate 12 , and the clamping device clamps the two end connecting plates 12 and the base frame body 11 provided between the end connecting plates 12 . The base frame body 11 includes two base frame beams 111 and an intermediate support plate 112 disposed between the two base frame beams 111 , and the intermediate support plate 112 is welded and fixed to the base frame beams 111 .

The clamping body 1 includes a horizontal supporting platform 14, which is respectively fixed with the positioning element 2 and the clamping device 3; the lower end of the supporting platform 14 is fixedly provided with a supporting bracket 16 with casters 15.

The positioning element 2 includes two limiting plates 21 oppositely arranged on the supporting platform, and a horizontal clamping device 22 fixed on the supporting platform is arranged on the outside of the limiting plates, and the horizontal clamping device 22 pushes the horizontal positioning base of the limiting plate. Frame body 11. A positioning block 23 is arranged on the outside of the limiting plate, and the positioning block is screwed to the limiting plate, and a locking hole 24 for locking the wing connecting plate 13 and the end connecting plate is arranged on the limiting plate and the positioning block.

The clamping device includes a horizontal quick clamp 31 arranged on the inner side of the limit plate to clamp the two end connecting plates 12 and the base frame body 11, and a second clamping device vertically clamping the end connecting plate 12 and the base frame beam 111. A tightening device 32 and a second tightening device 33 for vertically clamping the wing connecting plate 13 and the base frame beam 111 . The horizontal quick clamp 31 is fixedly connected with the limit plate, and the lower end of the base frame beam 111 is padded with a spacer 25 . The base frame body is further provided with a plurality of locking plates 26 perpendicular to the base frame beams 111 , and the locking plates are provided with locking grooves 27 that are engaged with the base frame beams 111 .

The horizontal clamping device 22 and the horizontal quick clamping device 31 are push-pull quick clamping devices; the first screwing device 32 and the second screwing device 33 are vertical clamping devices.

Fig. 5～8 is the assembly production method welding schematic diagram of hybrid electric vehicle roof battery rack base frame of the present invention; The method comprises the following steps:

The base frame body 11 is installed on the welding fixture; the welding fixture fixes the side wing connecting plate 13, and is clamped by the horizontal clamping device 22, and the two ends of the base frame body 11 and the end connecting plate 12 are clamped and positioned ; The lower end of the pedestal body 11 is padded with a pad;

Weld and fix the connection between the base frame body 11 and the end connection plate 12 and the connection between the base frame body 11 and the side wing connection plate 13 .

Specifically, it may include constructing the above-mentioned welding fixture according to the shape design of the base frame body and the end connecting plate and the side wing connecting plate of the hybrid electric vehicle; The connecting plate 13 is positioned and installed on the welding fixture; the base frame body 11 is limited front and rear by the limiting plate of the positioning element; the end connecting plate 12 is arranged at both ends of the base frame body 11, and the horizontal fast The clamp 31 clamps the connecting plates at both ends and the base frame body 11 between them, and vertically tightens the base frame body and the end connecting plates through the first tightening device 32; tightens the base frame body and the end connecting plates through the second tightening device The wing connecting plate 13 and the base frame body 11.

In addition, by setting a locking plate 26 on the upper end of the base frame body, the locking plate is provided with a locking groove to cooperate with the beam of the base frame to limit the position, and the locking hole 24 is set on the limiting plate, and the locking hole locks the side wings. Connection plates and end connection plates for easy soldering.

After the base frame body, the side wing connecting plates and the end connecting plates are all positioned and clamped, the joints of the base frame body 11 and the end connecting plates 12, the joints of the base frame body 11 and the side wing connecting plates are welded and fixed by welding tools, A welded hybrid vehicle roof battery frame base frame structure as shown in FIG. 9 can be formed.

In this embodiment, the base frame of the roof battery rack of the hybrid electric vehicle is welded by the welding fixture, which greatly reduces the cost and time of manual welding, and ensures the accuracy of welding and the stability of the size of the weldment.

The above examples are only to illustrate the technical conception and characteristics of the present invention, and its purpose is to allow people familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A welding jig for a base frame of an overhead battery rack of a hybrid electric vehicle, comprising a clamp body (1). The end connection plate (12) and the side wing connection plate (13) arranged outside the body are characterized in that the upper end of the clamp body is fixedly provided with a positioning element (2), and the positioning element (2) horizontally limits the base frame body (11) and the wing connection plate (13), the outside of the end connection plate (12) is provided with a clamping device (3), and the clamping device clamps the two end connection plates (12) and the end connection plate (12) the pedestal body (11) that is arranged between. 2. The welding fixture for the base frame of the battery rack mounted on the roof of the hybrid electric vehicle according to claim 1, characterized in that the base frame body (11) includes two base frame beams (111) and two base frame beams (111) An intermediate support plate (112) is arranged between them, and the intermediate support plate (112) is welded and fixed to the base frame beam (111). 3. The welding fixture for the base frame of the battery rack on top of the hybrid electric vehicle according to claim 1, characterized in that the clamp body (1) includes a horizontal support platform (14), and the support platforms (14) are respectively It is fixed with the positioning element (2) and the clamping device (3); the lower end of the support platform (14) is fixedly provided with a support bracket (16) with casters (15). 4. The welding fixture for the base frame of the battery rack mounted on the roof of the hybrid electric vehicle according to claim 1, characterized in that the positioning element (2) includes two limiting plates (21) oppositely arranged on the supporting platform, so that A horizontal clamping device (22) fixed on the support platform is arranged outside the limiting plate, and the horizontal clamping device (22) pushes the limiting plate to horizontally position the base frame body (11). 5. The welding jig for the base frame of the overhead battery rack of a hybrid electric vehicle according to claim 1, characterized in that a positioning block (23) is arranged on the outside of the limiting plate, and the positioning block is screwed to the limiting plate, And the locking holes (24) for locking the side wing connecting plates (13) and the end connecting plates are arranged on the limiting plate and the positioning block. 6. The welding jig for the base frame of the overhead battery rack of a hybrid electric vehicle according to claim 1, wherein the clamping device includes connecting plates (12 ) and the horizontal fast clamp (31) of the base frame body (11), the first tightening device (32) of the vertical direction clamping end connecting plate (12) and the base frame beam (111) and the vertical direction clamping The second screwing device (33) of the side wing connection plate (13) and the base frame beam (111). 7. The welding jig for the base frame of the battery rack on top of the hybrid electric vehicle according to claim 1, characterized in that the horizontal quick clamp (31) is fixedly connected to the limit plate, and the base frame beam (111 ) The lower end pad is provided with a spacer (25). 8. The welding fixture for the base frame of the battery rack mounted on the roof of the hybrid electric vehicle according to claim 1, characterized in that a plurality of clamping plates (26) perpendicular to the base frame beam (111) are arranged on the base frame body ), the clamping plate is provided with a clamping groove (27) that cooperates with the base frame beam (111) for clamping. 9. The welding fixture for the base frame of the battery rack mounted on the roof of a hybrid electric vehicle according to claim 1, wherein the horizontal quick clamp (31) is selected from a horizontal quick clamp, a push-pull quick clamp, a pull button Type quick clamp, multifunctional welding combined clamp; the first tightening device (32) and the second tightening device (33) are selected from vertical clamps. 10. A method for assembling and producing the base frame of the top-mounted battery rack of a hybrid electric vehicle, characterized in that the method comprises the following steps: The base frame body (11) is installed on the welding fixture; the welding fixture fixes the side wing connecting plate (13), and is clamped by a horizontal clamping device (22), and the two ends of the base frame body (11) and The end connecting plate (12) is clamped and positioned; the lower end of the base frame body (11) is padded with a pad; Welding is performed on the joints of the base frame body (11) and the end connecting plates (12) and the joints of the base frame body (11) and the side wing connecting plates (13).

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