A welding aid for tailpipe end cap of exhaust after treatment device

Abstract

The application provides a welding auxiliary device for a tail pipe end cover of an exhaust gas aftertreatment device, which can realize positioning and fixing welding of different tail pipe end covers on the aftertreatment device, has good universality, reduces production cost, and occupies small area, and comprises a base, wherein an end cover positioning cavity is arranged on the base, an end cover can be positioned in the end cover positioning cavity and is limited by the end cover positioning cavity; an end cover fixing mechanism can cooperate with the edge of the end cover to press the end cover in the end cover positioning cavity; a tail pipe fixing mechanism is arranged on the base corresponding to the tail pipe; a tail pipe positioning mechanism is arranged on one side of the base, the position of the tail pipe positioning mechanism can be adjusted along the edge of the base, and the tail pipe positioning mechanism comprises a positioning pin which can cooperate with a nitrogen oxygen sensor mounting seat on the tail pipe to position the tail pipe.

Description

Technical Field

[0001] This invention relates to the technical field of diesel vehicle exhaust aftertreatment production equipment, specifically to a welding auxiliary device for the tailpipe end cap of an exhaust aftertreatment device. Background Technology

[0002] In order to adapt to social development, most domestic vehicle manufacturers have adopted exhaust aftertreatment devices on diesel vehicles to reduce the emission of harmful substances in engine exhaust.

[0003] Figure 1 The present invention showcases a tailpipe assembly of an exhaust gas aftertreatment device, comprising an end cap 1 and a tailpipe 3 welded together. The end cap 1 is provided with a tailpipe welding connection part 2, and the tailpipe 3 is provided with a nitrogen oxide sensor mounting seat 4. However, the positions of the nitrogen oxide sensor mounting seat on the tailpipe vary in the height and circumferential directions on different models of exhaust gas aftertreatment devices. The traditional approach is to manufacture different devices to meet the welding requirements of different tailpipe end caps. However, designing welding auxiliary devices separately for each exhaust gas aftertreatment device product results in problems such as high investment costs, low equipment utilization, and large footprint. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device. This device can perform positioning and fixing welding on different tailpipe end caps on the aftertreatment device, offering good versatility, reducing production costs, and requiring minimal space.

[0005] The technical solution is as follows: A welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device, characterized in that it includes:

[0006] The base has an end cap positioning cavity, and the end cap can be placed in the end cap positioning cavity and is limited by the end cap positioning cavity;

[0007] An end cap fixing mechanism is provided, which can engage with the edge of the end cap to press the end cap into the end cap positioning cavity.

[0008] A tailpipe fixing mechanism is provided on the end cap, and the tailpipe is installed together with the end cap by cooperating with the tailpipe mounting part. The tailpipe fixing mechanism is provided on the base corresponding to the tailpipe, and the tailpipe fixing mechanism fixes the tailpipe on the inner side of the tailpipe.

[0009] A tailpipe positioning mechanism is provided on one side of the base. The position of the tailpipe positioning mechanism can be adjusted along the edge of the base. The tailpipe positioning mechanism includes a positioning pin, which can cooperate with the nitrogen and oxygen sensor mounting seat on the tailpipe to position the tailpipe.

[0010] Furthermore, the end cap fixing mechanism includes a clamping cylinder disposed on one side of the end cap positioning cavity. The clamping cylinder is mounted on the base via a vertical plate. The piston rod of the clamping cylinder is vertically upward and connected to a clamping plate. The piston rod of the clamping cylinder can drive the clamping plate to move and clamp the end cap.

[0011] Furthermore, the clamping plate includes an arcuate portion that can engage with the edge of the end cap, and the clamping plate is rotatable on the piston rod of the clamping cylinder.

[0012] Furthermore, at least two end cap fixing mechanisms are provided, and the end cap fixing mechanisms are respectively arranged at intervals at the edge of the end cap.

[0013] Furthermore, the tailpipe fixing mechanism includes an internal expansion clamping cylinder, the tailpipe is fitted on the outside of the internal expansion clamping cylinder, and the clamps of the internal expansion clamping cylinder can tension the tailpipe on the inside of the tailpipe.

[0014] Furthermore, it also includes a base, which is supported on the base by a support rod, and the tailpipe fixing mechanism is mounted on a mounting seat located below the base, which is fixed to the lower surface of the base by bolts.

[0015] Furthermore, a number of mounting holes are arranged at intervals around the base, and the tail tube positioning mechanism is fixed to the base by bolts engaging with the mounting holes. The base is also provided with mounting and positioning holes that can cooperate with the robot beam and the vertical circumferential welding equipment.

[0016] Furthermore, the tailpipe positioning mechanism includes a connecting base, a connecting plate connected to the connecting base, a positioning pin mounting seat hinged to the upper end of the connecting plate, a mounting seat limiting plate at the upper end of the connecting plate, bolt holes on the mounting seat limiting plate and the positioning pin mounting seat, a vertically arranged sliding groove on the positioning pin mounting seat, and several positioning holes parallel to the sliding groove on the positioning pin mounting seat. The positioning pin passes through a slider, which has a slider positioning groove that mates with the positioning holes. The slider is mounted on the positioning pin mounting seat by bolts engaging with the slider positioning groove and the positioning holes. The positioning pin passes through the sliding groove and faces the nitrogen-oxygen sensor mounting seat on the tailpipe. A spring is provided on the positioning pin.

[0017] Furthermore, the connecting plate and the connecting base are hinged together. A connecting plate limiting part is provided on the connecting base on the front side of the connecting plate. The connecting plate limiting part limits the connecting plate to keep it vertical. The connecting plate limiting part is made of metal, and a magnet is correspondingly provided on the connecting plate.

[0018] Furthermore, the end cap positioning cavity is provided with a tail tube mating groove corresponding to the tail tube mounting part, and the bottom of the end cap positioning cavity is provided with a tail tube limiting block mounting hole corresponding to the edge of the tail tube mating groove. The tail tube limiting block is installed in the tail tube limiting block mounting hole by bolts, and the tail tube limiting block can limit the bottom of the tail tube below the tail tube.

[0019] Furthermore, the base is provided with two positioning cavity mounting blocks corresponding to the end cap positioning cavity. The positioning cavity mounting blocks are provided with mounting grooves, and the outer side of the end cap positioning cavity is provided with positioning cavity positioning holes. Bolts pass through the mounting grooves and positioning cavity positioning holes to fix the end cap positioning cavity on the base.

[0020] The present invention relates to a welding auxiliary device for tailpipe end caps in exhaust gas aftertreatment devices. This device can assist in the welding of tailpipe end caps of various models. It achieves end cap fixation through the cooperation of an end cap fixing mechanism and an end cap positioning cavity, and positions the tailpipe through a tailpipe positioning mechanism. After positioning, the tailpipe is fixed by the tailpipe fixing mechanism, thus completing the fixation of the tailpipe and end cap. This facilitates welding equipment operation, improves welding efficiency, and allows for adjustable position and height of the positioning pins on the tailpipe positioning mechanism. This enables adaptation of nitrogen and oxygen sensor mounting bases on various tailpipe models in both height and circumferential directions, providing good versatility and fulfilling the need for multiple functions in one device. For multiple models, only the positioning position and height need to be adjusted, significantly reducing equipment investment costs, lowering production costs, and requiring minimal space. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a tailpipe assembly;

[0022] Figure 2 This is a schematic diagram from a first perspective of a welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device in an embodiment.

[0023] Figure 3 This is a schematic diagram from a second perspective of a welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device in an embodiment.

[0024] Figure 4 This is a top view of a welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device in one of the embodiments.

[0025] Figure 5 This is a schematic diagram of a welding auxiliary device for fixing the end cap of a tailpipe end cap in an embodiment of an exhaust gas aftertreatment device.

[0026] Figure 6 This is a schematic diagram of the positioning of the tailpipe in an embodiment of a welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device.

[0027] Figure 7 This is a schematic diagram from a first-view perspective of a tailpipe positioning mechanism in the embodiment;

[0028] Figure 8 This is a schematic diagram from a second perspective of a tailpipe positioning mechanism in an embodiment. Detailed Implementation

[0029] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below. In the description of this specification, references to terms such as "embodiment" indicate that a specific feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0030] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] See Figure 2 -to Figure 8 A welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device, comprising:

[0032] Base 100, with end cap positioning cavity 101 provided on base 100, end cap 1 can be placed in end cap positioning cavity 101 and limited by end cap positioning cavity 101;

[0033] The end cap fixing mechanism 200 can cooperate with the edge of the end cap 1 to press the end cap 1 into the end cap positioning cavity 101;

[0034] Tail tube fixing mechanism 300, end cap 1 is provided with tail tube mounting part 2, tail tube 3 is installed together with end cap 1 by cooperating with tail tube mounting part 2, and base 100 is provided with tail tube fixing mechanism 300 corresponding to tail tube 3, tail tube fixing mechanism 300 fixes tail tube 3 inside tail tube 3.

[0035] Tailpipe positioning mechanism 400 is disposed on one side of base 100. The position of tailpipe positioning mechanism 400 can be adjusted along the edge of base 100. Tailpipe positioning mechanism 400 includes positioning pin 401. Positioning pin 401 can cooperate with nitrogen and oxygen sensor mounting seat 4 on tailpipe 3 to position tailpipe 3.

[0036] In one specific embodiment of the present invention, the end cap fixing mechanism 200 includes a clamping cylinder 201 disposed on one side of the end cap positioning cavity 101. The clamping cylinder 201 is mounted on the base 100 via a vertical plate 202. The piston rod of the clamping cylinder 201 is vertically upward and is connected to a clamping plate 203. The piston rod of the clamping cylinder 201 can drive the clamping plate 203 to move and clamp the end cap 1. The clamping plate 203 includes an arc-shaped portion 204 that can cooperate with the edge of the end cap. The clamping plate 204 can rotate on the piston rod of the clamping cylinder 201. The rotatable clamping plate 204 facilitates the removal and placement of the end cap and makes operation convenient.

[0037] In this embodiment, two end cap fixing mechanisms 200 are provided, and the two end cap fixing mechanisms 200 are respectively arranged on both sides of the end cap 1. In other embodiments, the number of end cap fixing mechanisms 200 can be increased.

[0038] In one specific embodiment of the present invention, the tailpipe fixing mechanism 300 adopts an internal expansion clamping cylinder, and the tailpipe can be fitted on the outside of the internal expansion clamping cylinder. The jaws of the internal expansion clamping cylinder can tighten the tailpipe on the inside of the tailpipe. In one embodiment, a three-jaw internal expansion clamping cylinder is adopted.

[0039] In one embodiment of the present invention, a base 102 is also included. The base 101 is supported on the base 102 by a support rod 103. The internal expansion clamping cylinder of the tail tube fixing mechanism 300 is installed on the mounting seat 104 located below the base 101. The mounting seat 104 is fixed to the lower surface of the base 101 by bolts. The base 102 facilitates the installation and assembly of various mechanisms.

[0040] In one embodiment of the present invention, a plurality of mounting holes 105 are arranged at intervals around the base 101 on the base 102. The tail tube positioning mechanism 400 is fixed to the base 102 by bolts in cooperation with the mounting holes 105. The base 102 is also provided with mounting and positioning holes 106 that can cooperate with the robot beam and the vertical circumferential welding equipment. The mounting holes 105 arranged at intervals around the base 101 on the base realize different positioning of the tail tube positioning mechanism 400 in the circumferential direction. At the same time, the positioning holes and mounting holes of the robot beam and the vertical circumferential welding equipment are arranged on the base 102, which simultaneously meets the welding of the two types of equipment and improves the versatility of the equipment.

[0041] The base 1 is provided with two positioning cavity mounting blocks 109 corresponding to the end cover positioning cavity 101. The positioning cavity mounting blocks 109 are provided with mounting positioning grooves 110. The outer side of the end cover positioning cavity 101 is provided with positioning cavity positioning holes. Bolts pass through the mounting positioning grooves 110 and positioning cavity positioning holes to fix the end cover positioning cavity 101 on the base 100. The setting of the positioning cavity mounting blocks 109 facilitates the installation and positioning of the end cover positioning cavity 101.

[0042] See Figure 7 8. In one embodiment of the present invention, the tailpipe positioning mechanism 400 includes a connecting base 402, a connecting plate 403 connected to the connecting base 402, a positioning pin mounting seat 404 hinged to the upper end of the connecting plate 403, a mounting seat limiting plate 405 provided at the upper end of the connecting plate 403, bolt holes 411 respectively provided on the mounting seat limiting plate 405 and the positioning pin mounting seat 404, the positions of the mounting seat limiting plate 405 and the positioning pin mounting seat 404 can be locked by bolts, the positioning pin mounting seat 404 is provided with a vertically arranged sliding groove 406, and the positioning pin mounting seat 404 is parallel to the sliding groove. The groove 406 is provided with several positioning holes 407. The positioning pin 401 passes through the slider 408. The slider 408 is provided with a slider positioning groove 409 that can cooperate with the positioning holes 407. The slider 408 is installed on the positioning pin mounting seat 404 by bolts, which cooperates with the slider positioning groove 409 and the positioning holes 407. This allows the positioning pin to be adjustable in the height direction. The positioning pin 401 passes through the groove 406 and is set toward the nitrogen and oxygen sensor mounting seat 4 on the tailpipe. The positioning pin 401 is provided with a spring 410. After the positioning pin 401 is positioned, it can quickly spring back by the spring, which is convenient to use.

[0043] In one embodiment, the connecting plate 403 and the connecting base 402 are hinged together. A connecting plate limiting part 412 is provided on the front side of the connecting plate on the connecting base. The connecting plate limiting part 412 limits the connecting plate 403 so that the connecting plate 403 remains vertical. The connecting plate limiting part 412 is made of metal. A magnet is provided on the connecting plate 403. When the positioning pin is in position, the connecting plate 403 rotates to the vertical direction and is attracted to the connecting plate limiting part 412. After the positioning is completed, the connecting plate 403 is flipped downward so that the tail tube positioning mechanism 400 is completely away from the end cover and tail tube, preventing the positioning pin from interfering with the vertical circumferential welding equipment and improving the versatility of the auxiliary equipment.

[0044] In one embodiment, the end cap positioning cavity 101 is provided with a tail tube mating groove 107 corresponding to the tail tube mounting part 2, and the bottom of the end cap positioning cavity 101 is provided with a tail tube limiting block mounting hole 111 corresponding to the edge of the tail tube mating groove 107. The tail tube limiting block 108 is installed in the tail tube limiting block mounting hole 111 by bolts. The tail tube limiting block 108 can limit the bottom of the tail tube from below during welding, which facilitates the positioning of the tail tube on the auxiliary device.

[0045] The present invention provides a welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device. It can assist in the welding of various models of tailpipe end caps. The end cap can be fixed by the cooperation of the end cap fixing mechanism and the end cap positioning cavity. The tailpipe is positioned by the tailpipe positioning mechanism. After positioning, the tailpipe is fixed by the tailpipe fixing mechanism to complete the fixing of the tailpipe and the end cap. This facilitates welding equipment to perform welding. It is easy to use and improves welding efficiency.

[0046] This device uses different positioning holes arranged on the circumference of the base to achieve different circumferential positioning of the nitrogen-oxygen seat tailpipes in conjunction with the tailpipe positioning mechanism. The tailpipe positioning mechanism uses the slider positioning groove and positioning holes arranged on the slider to achieve different height positioning of the tailpipes in the nitrogen-oxygen seat. The tailpipe fixing mechanism of this device fixes the tailpipes by internal expansion clamping. This device can perform positioning, fixing and welding of different tailpipe end caps on the post-processing device. It has good versatility and meets the needs of multi-functional equipment. For multiple models, different products only need to adjust the positioning position and height, which greatly reduces equipment investment costs and production costs. It has a small footprint, which can reduce manufacturing complexity and tooling management costs for multiple models of post-processing devices. It also reduces the risk of product quality problems caused by frequent tooling changes in the case of multiple model variant machines.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device, characterized in that, include: The base has an end cap positioning cavity, and the end cap can be placed in the end cap positioning cavity and is limited by the end cap positioning cavity; An end cap fixing mechanism is provided, which can engage with the edge of the end cap to press the end cap into the end cap positioning cavity. A tailpipe fixing mechanism is provided on the end cap, and the tailpipe is installed together with the end cap by cooperating with the tailpipe mounting part. The tailpipe fixing mechanism is provided on the base corresponding to the tailpipe, and the tailpipe fixing mechanism fixes the tailpipe on the inner side of the tailpipe. A tailpipe positioning mechanism is provided on one side of the base. The position of the tailpipe positioning mechanism can be adjusted along the edge of the base. The tailpipe positioning mechanism includes a positioning pin, which can cooperate with the nitrogen and oxygen sensor mounting seat on the tailpipe to position the tailpipe. The tailpipe positioning mechanism includes a connecting base, a connecting plate connected to the connecting base, a positioning pin mounting seat hinged to the upper end of the connecting plate, a mounting seat limiting plate at the upper end of the connecting plate, bolt holes on the mounting seat limiting plate and the positioning pin mounting seat, a vertically arranged sliding groove on the positioning pin mounting seat, and several positioning holes parallel to the sliding groove on the positioning pin mounting seat. The positioning pin passes through a slider, which has a slider positioning groove that mates with the positioning holes. The slider is mounted on the positioning pin mounting seat by bolts engaging with the slider positioning groove and the positioning holes. The positioning pin passes through the sliding groove and faces the sensor mounting seat on the tailpipe. A spring is provided on the positioning pin. The connecting plate and the connecting base are hinged together. A connecting plate limiting part is provided on the connecting base on the front side of the connecting plate. The connecting plate limiting part limits the connecting plate to keep it vertical. The connecting plate limiting part is made of metal, and a magnet is provided on the connecting plate.

2. The welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device according to claim 1, characterized in that: The end cap fixing mechanism includes a clamping cylinder disposed on one side of the end cap positioning cavity. The clamping cylinder is mounted on the base via a vertical plate. The piston rod of the clamping cylinder is vertically upward and connected to a clamping plate. The piston rod of the clamping cylinder can drive the clamping plate to move and clamp the end cap.

3. The welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device according to claim 2, characterized in that: The clamping plate includes an arcuate portion that can engage with the edge of the end cap, and the clamping plate can rotate on the piston rod of the clamping cylinder.

4. The welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device according to claim 1, characterized in that: The tailpipe fixing mechanism includes an internal expansion clamping cylinder, the tailpipe is fitted on the outside of the internal expansion clamping cylinder, and the clamps of the internal expansion clamping cylinder can tension the tailpipe on the inside of the tailpipe.

5. The welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device according to claim 1, characterized in that: It also includes a base, which is supported on the base by a support rod, and the tailpipe fixing mechanism is mounted on a mounting seat located below the base, which is fixed to the lower surface of the base by bolts.

6. The welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device according to claim 5, characterized in that: A number of mounting holes are arranged at intervals around the base. The tail tube positioning mechanism is fixed to the base by bolts through the mounting holes. The base is also provided with mounting and positioning holes that can cooperate with the robot beam and the vertical circumferential welding equipment.

7. The welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device according to claim 1, characterized in that: The end cap positioning cavity is provided with a tail tube mating groove corresponding to the tail tube mounting part. The bottom of the end cap positioning cavity is provided with a tail tube limiting block mounting hole corresponding to the edge of the tail tube mating groove. The tail tube limiting block is installed in the tail tube limiting block mounting hole by bolts. The tail tube limiting block can limit the bottom of the tail tube below the tail tube.

8. The welding auxiliary device for the tailpipe end cap of an exhaust gas aftertreatment device according to claim 1, characterized in that: The base has two positioning cavity mounting blocks corresponding to the end cap positioning cavity. The positioning cavity mounting blocks have mounting grooves. The outer side of the end cap positioning cavity has a positioning cavity positioning hole. Bolts pass through the mounting grooves and positioning cavity positioning holes to fix the end cap positioning cavity to the base.

Images