A welding auxiliary device and method for a new energy bus roof skeleton fixing plate

Abstract

This invention belongs to the field of auxiliary welding technology and proposes a welding auxiliary device and method for fixing plates of roof frames in new energy buses. A first adjustment mechanism and a second adjustment mechanism are set between a fixed base and a working platform. During welding, firstly, the frame steel is placed on the frame welding fixture equipped with the welding auxiliary device. After the working platform and the steel are subjected to force, the first and second adjustment mechanisms are compressed and absorb height errors. Furthermore, the working platform is tilted by hinges with the first and second adjustment mechanisms to ensure that the upper surface of the working platform is flush with the lower surface of the two steel sections. Then, the fixing plate to be welded is placed on the working platform between the two steel sections, ensuring the flatness of the lower surface of the fixing plate to be welded with the lower surface of the steel sections. This avoids problems such as poor weld quality, insufficient welding strength leading to detachment under stress, and poor passenger grip due to non-vertical installation of handrails inside the vehicle caused by the skewed fixing plate.

Description

Technical Field

[0001] This invention belongs to the field of auxiliary welding technology, and particularly relates to a welding auxiliary device and method for fixing plates of roof frames of new energy buses. Background Technology

[0002] Bus manufacturing is a labor-intensive and technology-intensive industry. Given the current relatively small production volume and diverse product range, the main labor force is human workers, rather than automated robots. The unpredictability and instability of human labor pose significant challenges to manufacturing precision and dimensional consistency. Often, due to welding and assembly inaccuracies, the flatness of the fixing plate on the roof frame differs from that of the steel profile during welding. This leads to interference between the interior trim and the fixing plate during the installation of interior handrails, resulting in creases and affecting the quality of the interior appearance and the ease of handrail installation.

[0003] The inventors discovered that currently, the flatness of the welded frame fixing plate is ensured through manual welding or fixed limiting. The uncertainty of manual welding leads to poor flatness, and dimensional errors in the frame's transverse bending beams cause the fixed limiting to fail, making it difficult to guarantee the flatness of the lower plane of the fixing plate and the lower plane of the structural steel. Poor flatness due to weld misalignment of the fixing plate severely affects weld quality, resulting in substandard weld strength and a risk of detachment after installation of the interior handrail. Poor flatness due to weld misalignment of the fixing plate also leads to non-vertical or skewed installation of the interior handrail, severely affecting the passenger's grip. In cases of sudden braking, the passenger's grip is weak, potentially causing them to slip and fall, leading to passenger complaints. Furthermore, due to the misalignment of the fixing plate and the poor flatness of the structural steel, the interior trim panel between them is subjected to pressure and develops creases, severely affecting the interior appearance quality and reducing customer purchase desire. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a welding auxiliary device and method for fixing plates on the roof frame of new energy buses. This invention eliminates the need for measurement, allowing for one-time placement. During plate positioning, the plate height is determined by the change in the height of the steel profile, ensuring the lower plane of the fixing plate is flush with the lower plane of the steel profile. This solves the problem of difficulty in achieving perfect alignment between the lower plane of the fixing plate and the lower plane of the steel profile, avoiding issues such as poor weld quality due to plate skewing, insufficient weld strength leading to detachment under stress, poor passenger grip due to non-vertical installation of interior handrails, and poor interior appearance quality due to creases in the interior trim. Furthermore, it not only boasts high production efficiency and stable product quality but is also unaffected by worker skill levels.

[0005] To achieve the above objectives, in a first aspect, the present invention proposes a welding auxiliary device for fixing plates of the roof frame of new energy buses, adopting the following technical solution:

[0006] A welding auxiliary device for fixing plates of roof frames in new energy buses, comprising:

[0007] Fixed base;

[0008] The first adjustment mechanism is hinged to one end of the fixed base;

[0009] The second adjustment mechanism is fixed at the other end of the fixed base;

[0010] The working platform is hinged at both ends to the first adjustment structure and the second adjustment mechanism, respectively.

[0011] Furthermore, the fixed base is a rectangular metal plate, with a hinge support at one end connected to the first adjustment mechanism, and a bolt hole at the other end connected to the second adjustment mechanism by bolts.

[0012] Furthermore, the first adjustment mechanism includes a first hinge seat, a first sleeve fixedly connected to the first hinge seat, a first guide rod sleeved in the first sleeve, and a second hinge member fixedly connected to the first guide rod.

[0013] Furthermore, a first spring is sleeved on the first guide rod.

[0014] Furthermore, the second hinge member is provided with an outer sleeve, and the first sleeve is fitted inside the outer sleeve.

[0015] Furthermore, the second adjustment mechanism includes a bolt, a second sleeve connected to the bolt, a second guide rod sleeved in the second sleeve, and a third hinge fixedly connected to the second guide rod.

[0016] Furthermore, a second spring is sleeved on the second guide rod.

[0017] Furthermore, the third hinge member is provided with an outer sleeve, and the second sleeve is fitted inside the outer sleeve.

[0018] Furthermore, the working platform is a rectangular plate.

[0019] To achieve the above objectives, in a second aspect, the present invention also proposes a welding method for a fixing plate of the roof frame of a new energy bus, employing the following technical solution:

[0020] A welding method for fixing plates of roof frames of new energy buses, which adopts the welding auxiliary device for fixing plates of roof frames of new energy buses as described in the first aspect, includes: welding the welding auxiliary device to the frame welding fixture through a fixed base plate seat.

[0021] The frame steel is placed in a frame welding fixture equipped with welding auxiliary devices;

[0022] After the working platform and the steel section are subjected to force, the first and second adjustment mechanisms are compressed and absorb the height error. The resulting reaction force supports the working platform to always be in contact with the steel section. The working platform and the first and second adjustment mechanisms are hinged to achieve tilting, ensuring that the upper surface of the working platform is flush with the lower surface of the two steel sections.

[0023] Place the fixing plate to be welded on the working platform between the two steel sections, ensuring the flatness of the lower surface of the fixing plate to be welded with the lower surface of the steel section;

[0024] The weld between the welding fixing plate and the steel section.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. In this invention, a first adjustment mechanism and a second adjustment mechanism are set between the fixed base and the working platform. During welding, firstly, the frame steel is placed on the frame welding fixture equipped with welding auxiliary devices. After the working platform and the steel are subjected to force, the first and second adjustment mechanisms are compressed and absorb the height error. The resulting reaction force supports the working platform to always be in contact with the steel. The working platform is tilted by hinges with the first and second adjustment mechanisms to ensure that the upper surface of the working platform is flush with the lower surface of the two steel sections. Then, the fixing plate to be welded is placed on the working platform between the two steel sections to ensure the flatness of the lower surface of the fixing plate to be welded with the lower surface of the steel section. This avoids problems such as poor weld quality caused by the skewed fixing plate, failure to meet welding strength and falling off under stress, poor passenger grip caused by non-vertical installation of the interior armrest, and poor interior appearance quality caused by creases in the interior.

[0027] 2. This invention eliminates the need for manual support of the fixing plate, allowing for one-time positioning and placement, thus solving the problem of flatness difference between the fixing plate and the side steel sections. The flatness error has been reduced from 3mm to 0.5mm. When welding the top frame fixing plate, it is unaffected by the bending accuracy of the top crossbeam or welding deformation, resulting in improved weld strength, high production efficiency, and good product quality stability. It is also unaffected by changes in worker skills. The structure is stable and reliable, easy to install and manufacture, and has low maintenance costs, making it suitable for mass production applications. Attached Figure Description

[0028] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0029] Figure 1 This is a front view of Embodiment 1 of the present invention;

[0030] Figure 2 This is a side view of Embodiment 1 of the present invention;

[0031] Figure 3 This is a cross-sectional view of Embodiment 1 of the present invention;

[0032] Figure 4 This is a schematic diagram of the usage state of Embodiment 1 of the present invention.

[0033] Among them, 01, fixed base; 02, first adjustment mechanism; 03, working platform; 04, first hinge shaft; 05, nut; 06, second hinge shaft; 07, first hinge seat; 08, first guide rod; 09, first spring; 10, stud; 11, first sleeve; 12, second hinge seat; 13, bolt hole; 14, hinge support; 15, second adjustment mechanism; 16, structural steel; 17, fixed plate; 18, frame crossbeam; 19, frame welding fixture. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Example 1:

[0036] To address the issue of difficulty in ensuring the flatness of the lower plane of the fixing plate and the lower surface of the steel section during welding, this embodiment provides a welding auxiliary device for the fixing plate of the roof frame of a new energy bus, including a fixing base 01, a first adjustment mechanism 02, a working platform 03, a first hinge shaft 04, a nut 05, a second hinge shaft 06, a first hinge seat 07, a first guide rod 08, a first spring 09, a stud 10, a first sleeve 11, a second hinge seat 12, a bolt hole 13, a hinge support 14, and a second adjustment mechanism 15.

[0037] The first adjustment mechanism 02 is hinged to one end of the fixed base 01; the second adjustment mechanism 15 is fixed to the other end of the fixed base 01; the two ends of the working platform 03 are respectively hinged to the first adjustment mechanism 02 and the second adjustment mechanism 15, and the working platform is a rectangular plate. During welding, firstly, the frame steel 16 is placed on the frame welding fixture 20 equipped with welding auxiliary devices. After the working platform 03 and the steel 16 are subjected to force, the first adjustment mechanism 02 and the second adjustment mechanism 15 are compressed and absorb the height error. The resulting reaction force supports the working platform 03 to always be in contact with the steel 16. The working platform 03 is tilted by the first adjustment mechanism 02 and the second adjustment mechanism 15 through hinges, ensuring that the upper surface of the working platform 03 is flush with the lower surface of the two steel 16. Then, the fixing plate 17 to be welded is placed on the working platform 03 between the two steel 16, ensuring the flatness of the lower surface of the fixing plate 17 to be welded with the lower surface of the steel 16. This avoids problems such as poor weld quality caused by the skewed fixing plate 17, failure to meet welding strength and falling off under stress, poor passenger grip due to non-vertical installation of the interior armrest, and poor interior appearance quality caused by creases in the interior trim.

[0038] The fixed base 01 is a rectangular metal plate, with a hinge support at one end connected to the first adjusting mechanism 02, and a bolt hole 13 at the other end connected to the second adjusting mechanism 15 by bolts. The hinge can be achieved via a hinge shaft. The first adjusting mechanism 02 may include a first hinge seat 07, a first sleeve 11 fixedly connected to the first hinge seat 07, a first guide rod 8 sleeved in the first sleeve 11, and a second hinge member 12 fixedly connected to the first guide rod 8. Similarly, the second adjusting mechanism 15 includes a bolt, a second sleeve connected to the bolt, a second guide rod sleeved in the second sleeve, and a third hinge member fixedly connected to the second guide rod.

[0039] A first spring 09 is sleeved on the first guide rod 8. It can be understood that one end of the first spring 09 is in contact with or connected to the second hinge, and the other end is fixed inside the first sleeve 11. This allows the spring to be compressed when the first guide rod 8 moves inside the first sleeve 11 due to external force, and the spring to push the first guide rod 8 out of the first sleeve 11 after the external force disappears. A second spring is sleeved on the second guide rod, and its working principle is the same as that of the first spring 09, which will not be described in detail here.

[0040] The second hinge member 12 is provided with an outer sleeve, and the first sleeve 11 is fitted inside the outer sleeve; the third hinge member is provided with an outer sleeve, and the second sleeve is fitted inside the outer sleeve.

[0041] The working process or principle of this embodiment is as follows:

[0042] The device is welded to the frame welding fixture 20 and connected to the frame welding fixture 20 via the fixed base 01;

[0043] The top frame steel 16 is placed on the frame welding fixture 20 on which the device is installed;

[0044] Due to the influence of the bending accuracy of the frame beam 18 and the welding deformation, the position and height of the top frame steel 16 connected to it change. After the working platform 03 and the steel 16 are subjected to force, the first adjustment mechanism 02 and the second adjustment mechanism 15 are compressed and absorb the height error. The reaction force generated by them supports the working platform 03 to always be in contact with the steel 16. The working platform 03 is hinged to the first adjustment mechanism 02 and the second adjustment mechanism 15 to achieve tilting, ensuring that the upper plane of the working platform 03 is flush with the lower plane of the two steel 16.

[0045] The fixing plate 17 to be welded is placed on the working platform 03 between the two steel sections 16. The working platform 03 is supported on the lower plane of the two steel sections 16, ensuring the flatness of the lower plane of the fixing plate 17 and the lower plane of the steel section 16.

[0046] After placement, the weld between the fixing plate 17 and the steel section 16 can be directly welded without holding the fixing plate 17 by hand.

[0047] Before assembling and welding the fixing plate 17, weld the device to the top frame welding fixture. The specific position of the device needs to be determined according to the position and height of the fixing plate 17 to ensure that the device works within the support range. After the device is installed, the top frame can be welded normally. The pre-welded fixing plate 17 is placed directly on the working platform 03 of the device between the two steel sections 16, which can ensure that the lower plane of the working platform 03 is flush with the lower plane of the two steel sections 16. At this time, the preparation work for placing the plate is completed, and the welding of the fixing plate 17 can begin.

[0048] Example 2:

[0049] This embodiment provides a welding method for fixing plates of roof frames of new energy buses, which adopts the welding auxiliary device for fixing plates of roof frames of new energy buses as described in Embodiment 1, including: welding the welding auxiliary device to the frame welding fixture through a fixed base plate seat;

[0050] The frame steel is placed in a frame welding fixture equipped with welding auxiliary devices;

[0051] After the working platform and the steel section are subjected to force, the first and second adjustment mechanisms are compressed and absorb the height error. The resulting reaction force supports the working platform to always be in contact with the steel section. The working platform and the first and second adjustment mechanisms are hinged to achieve tilting, ensuring that the upper surface of the working platform is flush with the lower surface of the two steel sections.

[0052] Place the fixing plate to be welded on the working platform between the two steel sections, ensuring the flatness of the lower surface of the fixing plate to be welded with the lower surface of the steel section;

[0053] The weld between the welding fixing plate and the steel section.

[0054] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A welding auxiliary device for fixing plates of roof frames in new energy buses, characterized in that, include: Fixed base; The fixed base is a rectangular metal plate, with a hinge support at one end connected to the first adjustment mechanism, and a bolt hole at the other end connected to the second adjustment mechanism by bolts. The first adjustment mechanism is hinged to one end of the fixed base; The first adjustment mechanism includes a first hinge seat, a first sleeve fixedly connected to the first hinge seat, a first guide rod sleeved in the first sleeve, and a second hinge member fixedly connected to the first guide rod; A first spring is sleeved on the first guide rod; one end of the first spring is in contact with or connected to the second hinge, and the other end is fixed inside the first sleeve. This allows the spring to be compressed when the first guide rod moves inside the first sleeve due to external force, and the spring to push the first guide rod out of the first sleeve after the external force disappears. The second adjustment mechanism is fixed at the other end of the fixed base; The working platform is hinged at both ends to the first adjustment mechanism and the second adjustment mechanism, respectively. After the working platform is subjected to force in conjunction with the steel profile, the first and second adjustment mechanisms are compressed and absorb the height error. The resulting reaction force supports the working platform to always be in contact with the steel profile. Furthermore, the working platform is hinged to the first and second adjustment mechanisms, which can achieve tilting, ensuring that the upper surface of the working platform is flush with the lower surface of the two steel profiles. Place the fixing plate to be welded on the working platform between the two steel sections. The working platform is supported on the lower plane of the two steel sections to ensure the flatness of the lower plane of the fixing plate and the lower plane of the steel sections. After placement, the weld between the fixing plate and the steel section can be directly welded without holding the fixing plate by hand.

2. The welding auxiliary device for fixing the roof frame of a new energy bus as described in claim 1, characterized in that, The second hinge member is provided with an outer sleeve, and the first sleeve is fitted inside the outer sleeve.

3. The welding auxiliary device for fixing the roof frame of a new energy bus as described in claim 1, characterized in that, The second adjustment mechanism includes a bolt, a second sleeve connected to the bolt, a second guide rod sleeved in the second sleeve, and a third hinge fixedly connected to the second guide rod.

4. The welding auxiliary device for fixing the roof frame of a new energy bus as described in claim 3, characterized in that, A second spring is sleeved on the second guide rod.

5. The welding auxiliary device for fixing the roof frame of a new energy bus as described in claim 3, characterized in that, The third hinge member is provided with an outer sleeve, and the second sleeve is fitted inside the outer sleeve.

6. The welding auxiliary device for fixing the roof frame of a new energy bus as described in claim 1, characterized in that, The work platform is a rectangular plate.

7. A welding method for a fixing plate of the roof frame of a new energy bus, characterized in that, The welding auxiliary device for fixing the roof frame of a new energy bus as described in any one of claims 1-6 is used, comprising: welding the welding auxiliary device to the frame welding fixture via a fixed base plate seat; The frame steel is placed in a frame welding fixture equipped with welding auxiliary devices; After the working platform and the steel section are subjected to force, the first and second adjustment mechanisms are compressed and absorb the height error. The resulting reaction force supports the working platform to always be in contact with the steel section. The working platform and the first and second adjustment mechanisms are hinged to achieve tilting, ensuring that the upper surface of the working platform is flush with the lower surface of the two steel sections. Place the fixing plate to be welded on the working platform between the two steel sections, ensuring the flatness of the lower surface of the fixing plate to be welded with the lower surface of the steel section; The weld between the fixed plate and the steel section is directly welded.

Images