Auxiliary tool for press fitting of tail gas purification device

Abstract

The utility model provides an auxiliary tool for press fitting of a tail gas purification device. The auxiliary tool comprises an annular funnel and a limiting column. The annular funnel is provided with a large opening end and a small opening end, and the small opening end of the annular funnel is provided with an annular abutting face capable of making contact with the top of the barrel to be pressed. The multiple limiting columns are arranged on the outer wall of the small opening end of the annular funnel at intervals around the axis of the annular funnel, and each limiting column is provided with a clamping end extending outwards along the axis of the annular funnel. And each clamping end can be in contact with the outer wall of the barrel to be pressed, so that the axis of the annular funnel and the axis of the barrel to be pressed are collinear. According to the auxiliary tool for press fitting of the tail gas purification device, it can be guaranteed that a combination body of a catalytic unit and a liner is placed in from the large opening end, the combination body is pushed into a shell to be press-fitted through the small opening end by pushing equipment, then the liner is prevented from falling off or being damaged, and the press-fitting effect is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of press-fitting tools for tail gas purification devices, and particularly relates to an auxiliary tool for press-fitting tail gas purification devices. Background Art

[0002] Exhaust gas purification device refers to the exhaust gas purifier of the car, which usually includes a cylindrical shell and a honeycomb catalytic unit located inside the shell. The catalytic unit contains precious metals such as platinum, palladium and rhodium, which can remove CO, HC and NO emitted by the car. X The exhaust gas is converted into carbon dioxide, water, and nitrogen. Regarding the press-fitting of the exhaust gas purification device, the honeycomb catalytic unit is pressed into the upright shell cylinder. Because the honeycomb catalytic unit and the cylinder cavity are tightly fitted and fixed, a pushing device is required during the press-fitting process.

[0003] In existing technology, the catalytic unit must fit tightly within the cylindrical cavity of the housing, so a gasket (e.g., polycrystalline mullite fiber) is placed around the outer periphery of the catalytic unit. However, during the press-fitting process, the outer diameter of the gasket, before compression, is larger than the inner diameter of the cylindrical cavity. Consequently, interference between the gasket and the housing often occurs, causing the gasket to fall off or tear, resulting in poor press-fitting results. Utility Model Content

[0004] The embodiment of the utility model provides an auxiliary tool for press-fitting an exhaust gas purification device, aiming to solve the problem of poor press-fitting effect during the press-fitting of an existing catalytic unit with a gasket into an inner portion of a housing.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an auxiliary tool for press-fitting an exhaust gas purification device, comprising:

[0006] An annular funnel having a large opening end and a small opening end, wherein the small opening end of the annular funnel has an annular abutting surface for contacting the top of the cylinder to be pressed;

[0007] There are multiple limiting columns, each of which is arranged on the outer wall of the small opening end of the annular funnel at intervals around the axis of the annular funnel, and each of the limiting columns has a clamping end extending outward along the axis of the annular funnel; each of the clamping ends is used to contact the outer wall of the cylinder to be pressed, so that the axis of the annular funnel is arranged collinearly with the axis of the cylinder to be pressed.

[0008] In a possible implementation, the annular funnel includes:

[0009] a conical section, wherein the large diameter end is the large opening end;

[0010] The straight section is arc-shapedly connected to the small diameter end of the conical section and is coaxially arranged with the conical section. The end of the straight section away from the conical section is the small opening end, and the end surface of the straight section away from the conical section is the annular abutment surface.

[0011] In a possible implementation, each of the limiting columns and the straight tube section are welded integrally.

[0012] In a possible implementation, the inner diameter of the straight cylindrical section is smaller than the inner diameter of the cylindrical cavity of the outer shell to be press-fitted.

[0013] In a possible implementation, the auxiliary tooling for press-assembling the exhaust gas purification device further includes a support structure, and the support structure includes:

[0014] A circular bottom plate, arranged horizontally, for placing the shell to be press-fitted;

[0015] There are multiple screws, each of which is arranged in a vertical direction, and the bottom end of each screw is fixedly connected to the circular bottom plate;

[0016] A pressure ring is coaxially arranged with the circular bottom plate and has a plurality of through holes for each of the screws to pass through; the pressure ring is used to be sleeved on the straight tube section and has a plurality of notches for each of the limit columns to pass through;

[0017] There are multiple locking nuts, each corresponding to each screw rod. Each locking nut is used to press the pressure ring after each limiting column passes through the notch and the straight tube section drives each limiting column to rotate, so that the bottom surface of the pressure ring abuts against the top of each limiting column.

[0018] In a possible implementation, the support architecture further includes:

[0019] There are multiple fixing nuts, each of which corresponds to each of the screws, and each of the fixing nuts is located below the pressure ring;

[0020] There are multiple springs, each of which is set on each screw rod, and the bottom end of each spring abuts against the corresponding fixing nut, and the top end abuts against the pressure ring.

[0021] In this implementation, by positioning the annular funnel at the top of the housing to be press-fitted, and by abutting the annular contact surface against the top of the housing to be press-fitted, the catalyst unit and gasket assembly can be placed into the large opening, and the pushing device can push the assembly into the housing to be press-fitted through the small opening, thereby preventing the gasket from falling off or being damaged, and ensuring a press-fitting effect. By contacting the limiting posts with the outer wall of the housing to be press-fitted, the axis of the annular funnel and the axis of the housing to be press-fitted can be ensured to be collinear, thereby ensuring a press-fitting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the auxiliary tooling for press-fitting the exhaust gas purification device provided in the embodiment of the utility model Figure 1 ;

[0023] Figure 2 Schematic diagram of the structure of the auxiliary tooling for press-fitting the exhaust gas purification device provided in the embodiment of the utility model Figure 2 ;

[0024] Figure 3 for Figure 2 A schematic diagram of the main structure of the auxiliary tooling for press-assembly of an exhaust gas purification device provided in an embodiment (with a housing to be press-assembled and partially in cross-section);

[0025] Description of reference numerals:

[0026] 10. Annular funnel; 11. Conical section; 12. Straight section; 13. Annular abutment surface; 20. Limiting column; 30. Support structure; 31. Circular bottom plate; 32. Screw; 33. Pressing ring; 34. Locking nut; 35. Notch; 36. Fixing nut; 37. Spring; 40. Housing. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Please also refer to Figure 1 Now, the auxiliary tooling for press-fitting the exhaust gas purification device provided by the present invention will be described. The auxiliary tooling for press-fitting the exhaust gas purification device includes an annular funnel 10 and a limiting column 20. The annular funnel 10 has a large opening end and a small opening end. The small opening end of the annular funnel 10 has an annular abutment surface 13 that can contact the top of the cylinder to be press-fitted. There are multiple limiting columns 20, and each limiting column 20 is arranged on the outer wall of the small opening end of the annular funnel 10 at intervals around the axis of the annular funnel 10, and each limiting column 20 has a clamping end extending outward along the axis of the annular funnel 10. Each clamping end can contact the outer wall of the cylinder to be press-fitted, so that the axis of the annular funnel 10 is arranged collinearly with the axis of the cylinder to be press-fitted.

[0029] Compared with the prior art, the auxiliary tooling for press-fitting the exhaust gas purification device provided in this embodiment ensures that the catalytic unit and gasket assembly is placed at the large opening end by placing the annular funnel 10 at the top of the housing 40 to be press-fitted, and that the annular abutting surface 13 abuts the top of the housing 40 to be press-fitted. This ensures that the catalytic unit and gasket assembly is placed at the large opening end, and that the pushing device pushes the assembly into the housing 40 to be press-fitted through the small opening end, thereby preventing the gasket from falling off or being damaged, and ensuring the press-fitting effect. By each limiting column 20 contacting the outer wall of the housing 40 to be press-fitted, the axis of the annular funnel 10 can be ensured to be collinear with the axis of the housing 40 to be press-fitted, thereby ensuring the press-fitting effect.

[0030] In some embodiments, the annular funnel 10 may be used as follows Figure 1 See the structure shown. Figure 1 The annular funnel 10 includes a tapered end and a straight section 12. The large-diameter end of the tapered section 11 forms a large opening. The straight section 12 is connected to the small-diameter end of the tapered section 11 in an arc shape and is coaxially arranged with the tapered section 11. The end of the straight section 12 away from the tapered section 11 forms a small opening, and the end surface of the straight section 12 away from the tapered section 11 forms an annular abutment surface 13.

[0031] The conical section can ensure that the combination of the catalytic unit and the gasket can be placed, while the straight section 12 can ensure that it abuts against the shell 40 to be pressed. The arc connection between the two can ensure the smooth passage of the catalytic unit and the gasket combination. This structure can effectively prevent the gasket from falling or being damaged.

[0032] It should be noted that the structure of the annular funnel 10 can be formed by directly expanding a circular cylinder or by welding.

[0033] In some embodiments, the above-mentioned limiting column 20 can be used as follows Figure 1 See the structure shown. Figure 1 Each limiting column 20 and the straight tube section 12 are welded together to form an integral body, which is easy to manufacture and has a high connection strength.

[0034] In some embodiments, the straight section 12 may be formed as follows: Figure 2 See the structure shown. Figure 3 The inner diameter of the straight section 12 is smaller than the inner diameter of the cylinder cavity of the shell 40 to be pressed, so that the combination of the catalytic unit and the gasket can smoothly enter the shell 40.

[0035] In some embodiments, see Figure 2 and Figure 3The auxiliary tooling for pressing the exhaust gas purification device also includes a support structure 30, which includes a circular base plate 31, a screw 32, a pressure ring 33 and a locking nut 34. The circular base plate 31 is arranged horizontally and can be used to place the shell 40 to be pressed. There are multiple screws 32, and each screw 32 is arranged in a vertical direction, and the bottom end of each screw 32 is fixedly connected to the circular base plate 31. The pressure ring 33 is coaxially arranged with the circular base plate 31 and has a plurality of through holes for each screw 32 to pass through. The pressure ring 33 can be sleeved on the straight cylindrical section 12 and has a plurality of notches 35 for each limiting column 20 to pass through. There are multiple locking nuts 34, and each locking nut 34 corresponds to each screw 32 one by one. After each limiting column 20 passes through each notch 35 and the straight tube section 12 drives each limiting column 20 to rotate, each locking nut 34 can tighten the pressure ring 33 so that the bottom surface of the pressure ring 33 abuts against the top of each limiting column 20.

[0036] The annular funnel 10 and the top of the shell 40 to be pressed are directly erected, so its stability is relatively low. After being pushed by the pushing equipment, if the combination of the catalytic unit and the gasket is slightly flipped, the annular funnel 10 will inevitably be twisted or fallen, and the external force will also cause the limit column 20 to bend.

[0037] Therefore, a support structure 30 is provided. The circular base plate 31 in the support structure 30 can ensure the placement of the shell 40 to be pressed, and the pressure ring 33 can abut against the top of each limiting column 20 after the locking nut 34 is locked. At this time, the annular funnel 10 and the circular base plate 31 will clamp and fix the shell 40 to be pressed, and at the same time fix the annular funnel 10 to the shell 40 to be pressed, which can effectively ensure the stability of the annular funnel 10.

[0038] Specifically, the steps for use are as follows: first, place the housing 40 to be press-fitted on the circular base plate 31, then insert the pressure ring 33 through each screw 32 and install a locking nut 34 on each screw 32. Maintaining the height of the pressure ring 33, insert the small opening end of the annular funnel 10 into the inner hole of the pressure ring 33 and align it with the top of the housing 40. Then, rotate the annular funnel 10 so that the limiting posts 20 are offset from the notches 35. Then, rotate the locking nuts 34 so that the pressure ring 33 descends until it abuts the top of the limiting posts 20, thereby securing the housing 40 to be press-fitted.

[0039] In some embodiments, the support structure 30 may be configured as follows: Figures 2 to 3 The structure shown. Figures 2 to 3The support structure 30 further includes a fixing nut 36 and a spring 37. There are multiple fixing nuts 36, each corresponding to each screw rod 32, and each fixing nut 36 is located below the pressure ring 33. There are multiple springs 37, each spring 37 is mounted on each screw rod 32, with the bottom end of each spring 37 abutting the corresponding fixing nut 36 and the top end abutting the pressure ring 33.

[0040] After the housing 40 is press-fitted and removed, the pressing ring 33 may fall off, requiring relocation during the installation process. Therefore, the fixing nuts 36 and springs 37 support the pressing ring 33, preventing it from falling during assembly and disassembly, ensuring convenient assembly and disassembly and further ensuring a good press-fitting effect. This structure can also be adjusted to suit the height of the housing 40, offering strong adaptability.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Auxiliary tooling for press-fitting of exhaust gas purification device, characterized in that: include: An annular funnel having a large opening end and a small opening end, wherein the small opening end of the annular funnel has an annular abutting surface for contacting the top of the cylinder to be pressed; There are multiple limiting columns, each of which is arranged on the outer wall of the small opening end of the annular funnel at intervals around the axis of the annular funnel, and each of the limiting columns has a clamping end extending outward along the axis of the annular funnel; each of the clamping ends is used to contact the outer wall of the cylinder to be pressed, so that the axis of the annular funnel is arranged collinearly with the axis of the cylinder to be pressed.

2. The auxiliary tool for press-assembling the exhaust gas purification device according to claim 1, characterized in that: The annular funnel comprises: a conical section, wherein the large diameter end is the large opening end; The straight section is arc-shapedly connected to the small diameter end of the conical section and is coaxially arranged with the conical section. The end of the straight section away from the conical section is the small opening end, and the end surface of the straight section away from the conical section is the annular abutment surface.

3. The auxiliary tool for press-assembling the exhaust gas purification device according to claim 2, characterized in that: Each of the limiting columns and the straight tube section is welded together as one piece.

4. The auxiliary tool for press-assembling the exhaust gas purification device according to claim 2, characterized in that: The inner diameter of the straight cylindrical section is smaller than the inner diameter of the cylindrical cavity of the outer shell to be press-fitted.

5. The auxiliary tool for press-assembling the exhaust gas purification device according to claim 2, characterized in that: The auxiliary tooling for press-assembling the exhaust gas purification device further includes a support structure, which includes: A circular bottom plate, arranged horizontally, for placing the shell to be press-fitted; There are multiple screws, each of which is arranged in a vertical direction, and the bottom end of each screw is fixedly connected to the circular bottom plate; A pressure ring is coaxially arranged with the circular bottom plate and has a plurality of through holes for each of the screws to pass through; the pressure ring is used to be sleeved on the straight tube section and has a plurality of notches for each of the limit columns to pass through; There are multiple locking nuts, each corresponding to each screw rod. Each locking nut is used to press the pressure ring after each limiting column passes through the notch and the straight tube section drives each limiting column to rotate, so that the bottom surface of the pressure ring abuts against the top of each limiting column.

6. The auxiliary tool for press-assembling the exhaust gas purification device according to claim 5, characterized in that: The support structure also includes: There are multiple fixing nuts, each of which corresponds to each of the screws, and each of the fixing nuts is located below the pressure ring; There are multiple springs, each of which is set on each of the screws, and the bottom end of each spring abuts against the corresponding fixing nut, and the top end abuts against the pressure ring.

Images