Oxygen sensor tail pipe necking device

Abstract

The utility model discloses an oxygen sensor tail pipe necking device, which relates to the technical field of sensors, and comprises a frame, a locking disc and a plurality of cutters, a workbench and a lifting driving mechanism are arranged on the frame, and a positioning seat for positioning and supporting a sensor is arranged on the workbench; the cutters are annularly distributed with the central axis of the positioning base as the center, and the two ends of each cutter are provided with an arc-shaped cutter head and an inclined face respectively. The inner wall of the locking disc is a conical face, the lifting driving mechanism drives the locking disc to ascend and descend, the conical face abuts against all the inclined faces so as to drive all the tools to move towards the central axis of the positioning base, all the arc-shaped tool bits synchronously clamp and press the tail pipe of the sensor, and a necking structure is machined on the tail pipe. The lifting driving mechanism drives the locking opening disc to ascend and descend, the cutter is driven to move in the horizontal plane direction, and compared with the scheme that a horizontal linear driving mechanism is arranged, the occupied area is smaller, the size is small, the weight is light, and installation and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and particularly relates to a tail pipe necking device for an oxygen sensor. Background Art

[0002] The oxygen sensor is an important automotive component. It measures the oxygen potential in the automotive exhaust pipe using the Nernst principle and calculates the corresponding oxygen concentration through the chemical equilibrium principle. This oxygen sensor plays a key role in monitoring and controlling the combustion air-fuel ratio, thereby ensuring that the product quality and exhaust emissions of the vehicle meet the standards. The tail pipe of the oxygen sensor wraps the chip and the wire end, and the necking structure of the tail pipe clamps the clamp, and the clamp fixes the wire port and the chip interface together. At present, the driving mechanism of the processing equipment is set horizontally or in the horizontal direction, which has a large floor area and weight, and is complex in structure, making it inconvenient for installation and maintenance. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a tail pipe necking device for an oxygen sensor, which has a small floor area, a compact structure, and is convenient for installation and maintenance.

[0004] According to an embodiment of the utility model, a tail pipe necking device for an oxygen sensor includes a frame, a locking disk, and a plurality of cutting tools. A workbench and a lifting driving mechanism are provided on the frame. A positioning seat is provided on the workbench. The positioning seat has a vertical central axis and is used for positioning and supporting the oxygen sensor. The plurality of cutting tools are annularly distributed around the central axis of the positioning seat. An arc-shaped cutting head is provided at one end of each cutting tool, and an inclined surface is provided at the other end of each cutting tool. The inner wall of the locking disk is a conical surface. The output end of the lifting driving mechanism is connected to the locking disk. The lifting driving mechanism drives the locking disk to move up and down. The conical surface abuts against all the inclined surfaces to drive all the cutting tools to move towards the central axis of the positioning seat. All the arc-shaped cutting heads synchronously clamp the tail pipe of the oxygen sensor to process a necking structure on the tail pipe.

[0005] It has at least the following beneficial effects:

[0006] The lifting drive mechanism drives the movement of the locking disc. When the conical surface of the locking disc abuts against the inclined surface of the tool and continues to move, under the combined action of the conical surface and the inclined surface, the vertical movement of the locking disc is converted into the horizontal movement of the tool in the horizontal plane. The locking disc simultaneously drives all the arc-shaped tool heads to synchronously clamp the tail pipe of the oxygen sensor, thereby machining a necking structure on the tail pipe. The lifting drive mechanism drives the locking disc to lift and lower, realizing the drive of the tool to move in the horizontal plane direction, making the structure of the entire oxygen sensor tail pipe necking device compact and relatively simple. Compared with the solution of setting a horizontal linear drive mechanism, it occupies less floor space, is small in volume, light in weight, and is convenient for installation and maintenance.

[0007] According to some embodiments of the present invention, it further includes a support assembly. The support assembly is arranged on the workbench. The support assembly is annular. The locking disc is sleeved outside the support assembly. A plurality of guide holes are formed on the peripheral wall of the support assembly. The central axes of the plurality of guide holes intersect and are perpendicular to the central axis of the positioning seat. The support assembly is sleeved outside the positioning seat and is coaxially arranged with the positioning seat. The plurality of tools are respectively inserted into the plurality of guide holes. The arc-shaped tool head extends into the central hole of the support assembly, and the inclined surface is outside the support assembly.

[0008] According to some embodiments of the present invention, it further includes a plurality of elastic members. The two ends of the elastic members respectively abut against or are connected to the tool and the support assembly to force the tool away from the central axis of the positioning seat.

[0009] According to some embodiments of the present invention, the support assembly includes a support ring and a limiting ring arranged on the support ring. The lower end of the support ring is connected to the workbench and is sleeved outside the positioning seat. The guide holes are formed between the support ring and the limiting ring.

[0010] According to some embodiments of the present invention, a plurality of receiving grooves are formed on the outer circumferential wall of the limiting ring. The elastic members are arranged at the bottom of the receiving grooves. A slider is arranged in the receiving groove. One end of the elastic member abuts against the tool through the slider.

[0011] According to some embodiments of the present invention, a limiting hole is arranged on the tool. The length axis of the limiting hole intersects and is perpendicular to the central axis of the positioning seat. A limiting post is arranged on the inner wall of the guide hole. The limiting post is inserted into the limiting hole to limit the stroke of the tool.

[0012] According to some embodiments of the present utility model, the lifting drive mechanism is arranged below the workbench. An output end of the lifting drive mechanism is provided with a lifting plate. A plurality of ejector rods distributed in a ring shape are arranged on the lifting plate. Avoidance holes are formed in the workbench in areas corresponding to the ejector rods. Upper ends of the ejector rods penetrate through the avoidance holes and extend above the workbench. Upper ends of the ejector rods are connected to the lock mouth plate, and the diameter of the conical surface is larger at the top and smaller at the bottom.

[0013] According to some embodiments of the present utility model, a plurality of vertical rods are connected to a lower surface of the workbench. Lower ends of the vertical rods are connected to a body of the lifting drive mechanism. A plurality of guide sleeves are connected to the lifting plate, and the plurality of guide sleeves are respectively sleeved on the plurality of vertical rods.

[0014] According to some embodiments of the present utility model, a protective cover is further included. The protective cover covers the lock mouth plate. A funnel-shaped guiding port is formed at a top of the protective cover, and the guiding port is directly opposite to the positioning seat to guide the oxygen sensor to fall on the positioning seat.

[0015] According to some embodiments of the present utility model, mounting holes are formed in the workbench. The positioning seat is tubular, and the positioning seat is vertically mounted in the mounting holes. A tube cavity of the positioning seat is used for the lower end of the oxygen sensor to pass through, and an upper end face of the positioning seat is used for supporting a shoulder of the oxygen sensor.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a structural schematic diagram of an oxygen sensor;

[0019] Figure 2 is a structural schematic diagram of a tool in an embodiment of the present utility model;

[0020] Figure 3 is a structural schematic diagram of an embodiment of the present utility model;

[0021] Figure 4 is a cross-sectional structural schematic diagram of a workbench, a cushion block, a lock mouth plate, a support assembly, a positioning seat and a tool in an embodiment of the present utility model;

[0022] Figure 5 is Figure 4 a partial enlarged schematic diagram at A in

[0023] Figure 6Structural schematic diagram of the cushion block, lock port disc, slider, tool and support assembly according to an embodiment of the present utility model;

[0024] Reference numerals in the attached drawings:

[0025] Oxygen sensor 10, necking structure 11, shoulder 12, wire 13;

[0026] Frame 100, workbench 110, positioning seat 111, lifting drive mechanism 120, lifting plate 121, ejector rod 122, vertical rod 130, guide sleeve 140, bracket 150, clamping block 151;

[0027] Tool 200, arc cutter head 210, inclined plane 220, limit hole 230;

[0028] Lock port disc 300, conical surface 310;

[0029] Support assembly 400, support ring 410, limit ring 420, storage groove 421;

[0030] Elastic member 500;

[0031] Slider 600;

[0032] Limit post 700;

[0033] Protective cover 800, guide port 810. Detailed implementation manners

[0034] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, "a plurality of" means more than two. If the first and second are described, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0037] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0038] See Figure 1 , the oxygen sensor 10 is a known processed product, and the oxygen sensor 10 includes components such as a reduced diameter structure 11, a shoulder 12, and a wire 13.

[0039] See Figures 2 to 6 , the present utility model discloses a device for reducing the diameter of the tail pipe of an oxygen sensor, which includes a frame 100, a locking disk 300, and a plurality of cutting tools 200. A workbench 110 and a lifting drive mechanism 120 are provided on the frame 100. A positioning seat 111 is provided on the workbench 110. The positioning seat 111 has a vertical central axis, and the positioning seat 111 is used to position and support the oxygen sensor 10; the plurality of cutting tools 200 are annularly distributed around the central axis of the positioning seat 111. An arc-shaped cutting head 210 is provided at one end of the cutting tool 200, and an inclined surface 220 is provided at the other end of the cutting tool 200; the inner wall of the locking disk 300 is a conical surface 310. The output end of the lifting drive mechanism 120 is connected to the locking disk 300. The lifting drive mechanism 120 drives the locking disk 300 to move up and down. The conical surface 310 abuts against all the inclined surfaces 220 to drive all the cutting tools 200 to move towards the central axis of the positioning seat 111, and all the arc-shaped cutting heads 210 simultaneously clamp the tail pipe of the oxygen sensor 10 to process a reduced diameter structure 11 on the tail pipe.

[0040] In the initial state, the plurality of cutting tools 200 are located at a position far from the central axis of the positioning seat 111, and the oxygen sensor 10 can be placed on the positioning seat 111 unobstructed. At this time, the tail pipe of the oxygen sensor 10 is at the same height as all the arc-shaped cutting heads 210. Then, the lifting drive mechanism 120 drives the locking disk 300 to move. When the conical surface 310 of the locking disk 300 abuts against the inclined surface 220 of the cutting tool 200 and continues to move, under the combined action of the conical surface 310 and the inclined surface 220, the vertical movement of the locking disk 300 is converted into the horizontal movement of the cutting tool 200. The locking disk 300 simultaneously drives all the arc-shaped cutting heads 210 to clamp the tail pipe of the oxygen sensor 10 synchronously, so as to process a reduced diameter structure 11 on the tail pipe.

[0041] The lifting drive mechanism 120 drives the locking disk 300 to move up and down, realizing the drive of the cutting tool 200 to move in the horizontal direction, making the structure of the entire device for reducing the diameter of the tail pipe of the oxygen sensor compact and relatively simple. Compared with the scheme of setting a horizontal linear drive mechanism, it occupies less floor space, has a small volume, is light in weight, and is convenient for installation and maintenance.

[0042] See Figure 6, in this embodiment, the number of the cutting tools 200 is six. The six cutting tools 200 have the same structure and are arranged in a ring. When the six arc-shaped cutting heads 210 arranged in a ring are put together, a cavity adapted to the necking structure 11 is formed.

[0043] See Figure 2 , it can be understood that the arc-shaped cutting head 210 is in the shape of an arc-shaped protrusion. For the number of concave rings distributed up and down in the necking structure 11, the same number of arc-shaped cutting heads 210 distributed up and down need to be arranged on the same cutting tool 200. One end face of the cutting tool 200 is an arc surface, and the radius of the arc surface is matched with the radius of the tail pipe, so that the arc surface and the outer circular surface of the tail pipe can be closely attached. When the arc-shaped cutting head 210 extrudes a part of the tail pipe to be deformed into a concave ring, the area of the tail pipe close to the concave ring is attached to the arc surface, avoiding excessive deformation of the area of the tail pipe other than the concave ring. The area of the tail pipe other than the concave ring retains a cylindrical surface as a whole, thereby achieving the necking structure 11.

[0044] In this embodiment, two arc-shaped cutting heads 210 are arranged up and down on the cutting tool 200.

[0045] See Figures 4 to 6 , in some of these embodiments, the oxygen sensor tail pipe necking device further includes a support assembly 400. The support assembly 400 is arranged on the workbench 110. The support assembly 400 is in a ring shape. The locking disc 300 is sleeved outside the support assembly 400. A plurality of guide holes are opened on the peripheral wall of the support assembly 400. The central axes of the plurality of guide holes intersect and are perpendicular to the central axis of the positioning seat 111. The support assembly 400 is sleeved outside the positioning seat 111 and is coaxially arranged with the positioning seat 111. The plurality of cutting tools 200 are respectively inserted into the plurality of guide holes, and the arc-shaped cutting heads 210 extend into the central hole of the support assembly 400, and the inclined surfaces 220 are outside the support assembly 400. The support assembly 400 functions to support the plurality of cutting tools 200 and position the heights of the plurality of cutting tools 200. The guide holes function to guide the moving direction of the cutting tools 200, so that all the cutting tools 200 can move towards the direction close to the central axis of the positioning seat 111 or move away from the central axis of the positioning seat 111.

[0046] It can be understood that the central axes of the plurality of guide holes are on the same horizontal plane, and the central axes of the plurality of guide holes are radially distributed with the central axis of the positioning seat 111 as the center, and the included angles between all adjacent two guide holes are equal.

[0047] See Figure 4 and Figure 5, in some of these embodiments, the oxygen sensor tailpipe necking device further includes a plurality of elastic members 500. Two ends of the elastic member 500 respectively abut against or are connected to the tool 200 and the support assembly 400. When the tool 200 processes a necking structure 11 on the tailpipe or in the initial state, the conical surface 310 is far from the inclined surface 220, that is, there is a large distance between the conical surface 310 and the inclined surface 220, and no force acts on the tool 200 from the locking disc 300. The elastic member 500 can then force the tool 200 to move away from the central axis of the positioning seat 111, so that the tool 200 is far from the central axis of the positioning seat 111, completing the reset of the tool 200 and preparing for the next processing of the necking structure 11.

[0048] In some of these embodiments, the support assembly 400 includes a support ring 410 and a limit ring 420 provided on the support ring 410. The lower end of the support ring 410 is connected to the workbench 110 and sleeved outside the positioning seat 111. A guiding hole is formed between the support ring 410 and the limit ring 420. The tool 200 can be pre - placed in the guiding hole by disassembling the support ring 410 and the limit ring 420, and then the lower end of the support ring 410 is connected to the workbench 110, which is convenient for arranging all the tools 200.

[0049] See Figure 5 and Figure 6 , in some of these embodiments, a plurality of receiving grooves 421 are formed on the outer circumferential wall of the limit ring 420. The elastic member 500 is arranged at the bottom of the receiving groove 421. A slider 600 is arranged in the receiving groove 421. One end of the slider 600 slides in the receiving groove 421, and the other end of the slider 600 extends outside the receiving groove 421 and can abut against the tool 200, that is, one end of the elastic member 500 abuts against the tool 200 through the slider 600. The receiving groove 421 plays a role in limiting the elastic member 500 and the slider 600, which is convenient for arranging the elastic member 500 and the slider 600.

[0050] See Figure 6 , in this embodiment, the receiving groove 421 is a circular groove, the elastic member 500 is a spring, and the slider 600 is cylindrical.

[0051] It can be understood that a convex block protruding upward is provided at the other end of the tool 200, so that the whole tool 200 is L - shaped. The position of the convex block is higher than the position of the guiding hole, and the convex block is aligned with the receiving groove 421, so that the other end of the slider 600 directly abuts against the convex block of the tool 200. The convex block also makes the end face area of the other end of the tool 200 larger, and further makes the area of the inclined surface 220 larger. There is a sliding friction between the conical surface 310 and the inclined surface 220. The larger area of the inclined surface 220 can slow down the wear of the inclined surface 220 and reduce the risk of damage to the inclined surface 220 caused by extrusion.

[0052] It is known that the inclined surface 220 of the cutting tool 200 is a conical arc surface, that is, the inclined surface 220 can be closely attached to the conical surface 310, ensuring that the conical surface 310 can stably drive the cutting tool 200 to move.

[0053] In another embodiment, the position of the receiving groove 421 can be changed to be provided on the support ring 410, and other structures remain unchanged. The receiving groove 421 on the support ring 410 also serves to limit the elastic member 500 and the slider 600, facilitating the arrangement of the elastic member 500 and the slider 600.

[0054] See Figure 2 and Figure 5 , in some of these embodiments, the cutting tool 200 is provided with a limiting hole 230. The length axis of the limiting hole 230 intersects and is perpendicular to the central axis of the positioning seat 111. The inner wall of the guiding hole is provided with a limiting post 700. The limiting post 700 passes through the limiting hole 230. The limiting post 700 defines the closest position where the cutting tool 200 can move towards the central axis of the positioning seat 111, and the limiting post 700 also defines the farthest position where the cutting tool 200 can move away from the central axis of the positioning seat 111, while preventing the cutting tool 200 from detaching from the guiding hole and the support assembly 400.

[0055] It can be envisioned that the upper surface of the workbench 110 is connected with an annular backing plate by a first screw, the support ring 410 is connected with the backing plate by a second screw, the upper end surface of the support ring 410 is provided with a limiting groove, the limiting ring 420 is connected with the support ring 410 by a third screw, the side wall of the limiting groove and the lower end surface of the limiting ring 420 enclose a guiding hole, the bottom of the limiting groove is provided with a connecting hole, one end of the limiting post 700 is provided with an external thread, and the external thread is threadedly connected with the side wall of the connecting hole. The other end of the limiting post 700 faces upward and is a smooth rod. The cutting tool 200 is provided with a limiting hole 230, the axial direction of the limiting hole 230 is the up and down direction, and the smooth rod is inserted into the limiting hole 230 from bottom to top. The length direction of the limiting hole 230 intersects and is perpendicular to the central axis of the positioning seat 111.

[0056] It can be understood that the connecting hole penetrates through the lower end surface of the support ring 410 and the bottom of the limiting groove. The connecting hole is a stepped hole with a smaller upper part and a larger lower part. The upper end of the connecting hole is provided with an internal thread. The limiting post 700 is a fourth screw, and the fourth screw has a smooth rod section, an external thread section, and a head connected in sequence. The head is arranged at the lower end of the connecting hole, and the external thread section is in threaded cooperation with the upper end of the connecting hole. The smooth rod section extends outside the connecting hole and is located in the limiting groove.

[0057] When installing the oxygen sensor tail pipe necking device, first install the backing plate on the upper surface of the workbench 110 through the first screw, then pass the fourth screw upward through the connection hole and connect it with the connection hole, so that the smooth rod section of the fourth screw extends outside the connection hole and is located in the limiting groove. Then install the support ring 410 on the backing plate through the second screw. The cutter 200 is sleeved on the smooth rod section through the limiting hole 230 and is placed in the limiting groove. Immediately afterwards, install the limiting ring 420 on the support ring 410 through the third screw.

[0058] See Figure 3 and Figure 4 In some embodiments, the lifting drive mechanism 120 is arranged below the workbench 110. The output end of the lifting drive mechanism 120 is provided with a lifting plate 121. A plurality of ejector rods 122 distributed in a ring are arranged on the lifting plate 121. Avoidance holes are opened in the workbench 110 in the area corresponding to the ejector rods 122. The upper ends of the ejector rods 122 pass through the avoidance holes and extend above the workbench 110. The upper end heads of the ejector rods 122 are connected to the locking disc 300. The lifting drive mechanism 120 is housed below the workbench 110, which can make the structure of the oxygen sensor tail pipe necking device more compact and occupy a smaller area and height.

[0059] When the lifting drive mechanism 120 drives the lifting plate 121 to lift and lower, the lifting plate 121 drives the locking disc 300 to lift and lower through a plurality of ejector rods 122. The lifting drive mechanism 120 can be a cylinder.

[0060] The diameter of the conical surface 310 is larger at the top and smaller at the bottom. The upper end of the inclined surface 220 is at a greater distance from the central axis of the positioning seat 111 than the lower end of the inclined surface 220. The inclined surface 220 projects downward onto the conical surface 310. When the lifting drive mechanism 120 drives the lifting plate 121, a plurality of ejector rods 122 and the locking disc 300 to rise, the conical surface 310 abuts against all the inclined surfaces 220, and the locking disc 300 will drive all the cutters 200 to move towards the central axis of the positioning seat 111 to complete the processing of the necking structure 11; when the lifting drive mechanism 120 drives the lifting plate 121, a plurality of ejector rods 122 and the locking disc 300 to descend, under the action of the elastic member 500, all the cutters 200 move away from the central axis of the positioning seat 111.

[0061] See Figure 4, in some of these embodiments, multiple vertical rods 130 are connected to the lower surface of the workbench 110, and the lower ends of the vertical rods 130 are connected to the body of the lifting drive mechanism 120, thereby fixing the lifting drive mechanism 120 on the workbench 110. Multiple guide sleeves 140 are connected to the lifting plate 121, and the multiple guide sleeves 140 are respectively sleeved on the multiple vertical rods 130. The guide sleeves 140 slide up and down along the vertical rods 130. The cooperation between the vertical rods 130 and the guide sleeves 140 plays a role in guiding the lifting plate 121 to move up and down, preventing the lifting plate 121, the multiple vertical rods 130, and the locking disc 300 from shifting in the horizontal plane direction.

[0062] The lifting plate 121 is connected to various regions of the locking disc 300 through multiple ejector rods 122, enabling the various regions of the locking disc 300 to be balanced in force, ensuring that the various regions of the locking disc 300 are lifted and lowered synchronously, further ensuring the accuracy of the movement of all the cutting tools 200 towards the central axis of the positioning seat 111, and finally ensuring the processing quality of the necking structure 11.

[0063] In this embodiment, the number of both the vertical rods 130 and the guide sleeves 140 is four. One vertical rod 130 and one guide sleeve 140 form a guiding mechanism, and a total of four guiding mechanisms are formed. The four guiding mechanisms are distributed in a rectangular shape. The number of ejector rods 122 is four, and the four ejector rods 122 are distributed in a rectangular shape.

[0064] It can be imagined that the backing plate is also provided with avoidance holes in the regions corresponding to the ejector rods 122. The upper ends of the ejector rods 122 sequentially pass through the avoidance holes on the workbench 110 and the avoidance holes on the backing plate. The upper end heads of the ejector rods 122 are connected with a connecting ring through fifth screws, and the connecting ring is connected to the lower end face of the locking disc 300 through sixth screws. The connecting ring is sleeved outside the support ring 410.

[0065] See Figure 3 , in some of these embodiments, the oxygen sensor tail pipe necking device further includes a protective cover 800. The protective cover 800 covers the locking disc 300. A funnel-shaped guiding port 810 is opened at the top of the protective cover 800. The guiding port 810 is directly opposite to the positioning seat 111 to guide the oxygen sensor 10 to fall on the positioning seat 111, improving the efficiency of positioning the oxygen sensor 10 on the positioning seat 111.

[0066] In another embodiment, it can be arranged above the lifting drive mechanism 120. The output end of the lifting drive mechanism 120 faces downward and is connected to the locking disk 300. The diameter of the conical surface 310 is changed to be smaller at the top and larger at the bottom. The distance between the upper end and the center axis of the positioning seat 111 of the inclined surface 220 is changed to be smaller than that of the lower end of the inclined surface 220. The inclined surface 220 projects upward onto the conical surface 310. When the lifting drive mechanism 120 drives the lifting plate 121, multiple ejector rods 122 and the locking disk 300 to descend, the conical surface 310 abuts against all the inclined surfaces 220, and the locking disk 300 will drive all the cutting tools 200 to move towards the center axis of the positioning seat 111 to complete the processing of the necking structure 11. When the lifting drive mechanism 120 drives the lifting plate 121, multiple ejector rods 122 and the locking disk 300 to ascend, under the action of the elastic member 500, all the cutting tools 200 move away from the center axis of the positioning seat 111.

[0067] See Figure 4 and Figure 5 , in some of these embodiments, an installation hole is provided on the workbench 110. The positioning seat 111 is tubular and is vertically installed in the installation hole. The lumen of the positioning seat 111 is for the lower end of the oxygen sensor 10 to pass through, and the upper end face of the positioning seat 111 is used to support the shoulder 12 of the oxygen sensor 10. The upper end face of the positioning seat 111 supports the shoulder 12, and the side wall of the positioning seat 111 limits the lower end of the oxygen sensor 10, thereby completing the positioning of the oxygen sensor 10.

[0068] It can be understood that the positioning seat 111 and the workbench 110 are connected by a threaded structure, and the height of the positioning seat 111 can be adjusted by rotating the positioning seat 111. For oxygen sensors 10 of different lengths, by adjusting the height of the positioning seat 111, it can be ensured that the area on the tail pipe where the necking structure 11 needs to be processed is directly opposite to all the cutting tools 200, that is, the area on the tail pipe where the necking structure 11 needs to be processed and all the arc-shaped cutting heads 210 are on the same horizontal plane, ensuring the machining position accuracy of the necking structure 11.

[0069] See Figure 3 , a bracket 150 is further provided on the workbench 110. A clamping block 151 is provided on the bracket 150. The clamping block 151 is higher than the protective cover 800. The clamping block 151 is used to clamp the wire 13 of the oxygen sensor 10. When the oxygen sensor 10 is placed on the positioning seat 111, the wire 13 is a free end. To avoid interference between the wire 13 and other components, the end of the wire 13 far from the positioning seat 111 is clamped on the clamping block 151.

[0070] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0071] Of course, the present utility model is not limited to the above embodiments, and those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An oxygen sensor tail pipe shrinking device, characterized in that: include: A frame (100) is provided with a workbench (110) and a lifting drive mechanism (120); a positioning seat (111) is provided on the workbench (110); the positioning seat (111) has a vertical central axis, and the positioning seat (111) is used to position and support the oxygen sensor (10); A plurality of cutting tools (200), wherein the plurality of cutting tools (200) are distributed in a ring shape with the central axis of the positioning seat (111) as the center, an arc-shaped cutting head (210) is provided on one end of the cutting tool (200), and a bevel (220) is provided on the other end of the cutting tool (200); The locking plate (300) has an inner wall which is a conical surface (310). The output end of the lifting drive mechanism (120) is connected to the locking plate (300). The lifting drive mechanism (120) drives the locking plate (300) to rise and fall. The conical surface (310) abuts against all the inclined surfaces (220) to drive all the cutting tools (200) to move toward the central axis of the positioning seat (111). All the arc-shaped cutting heads (210) synchronously clamp the tail pipe of the oxygen sensor (10) to machine a shrinkage structure (11) on the tail pipe.

2. The oxygen sensor tail pipe necking device according to claim 1, characterized in that: It also includes a support component (400), which is arranged on the workbench (110), and the support component (400) is annular. The locking plate (300) is sleeved outside the support component (400), and a plurality of guide holes are opened on the peripheral wall of the support component (400). The central axes of the plurality of guide holes intersect with the central axis of the positioning seat (111) and are perpendicular to each other. The support component (400) is sleeved outside the positioning seat (111) and is coaxially arranged with the positioning seat (111). The plurality of cutting tools (200) are respectively inserted into the plurality of guide holes, and the arc-shaped cutting head (210) extends into the central hole of the support component (400). The inclined surface (220) is outside the support component (400).

3. The oxygen sensor tail pipe necking device according to claim 2, characterized in that: It also includes a plurality of elastic members (500), the two ends of which are respectively against or connected to the tool (200) and the support assembly (400) to force the tool (200) to move away from the central axis of the positioning seat (111).

4. The oxygen sensor tail pipe shrinking device according to claim 3, characterized in that: The support assembly (400) comprises a support ring (410) and a limiting ring (420) arranged on the support ring (410); the lower end of the support ring (410) is connected to the workbench (110) and is sleeved outside the positioning seat (111); and the guide hole is formed between the support ring (410) and the limiting ring (420).

5. The oxygen sensor tail pipe shrinking device according to claim 4, characterized in that: A plurality of receiving grooves (421) are provided on the outer circumferential wall of the limiting ring (420), the elastic member (500) is arranged in the groove bottom of the receiving groove (421), a sliding block (600) is arranged in the receiving groove (421), and one end of the elastic member (500) is pressed against the tool (200) through the sliding block (600).

6. The oxygen sensor tail pipe necking device according to any one of claims 2 to 5, characterized in that: The tool (200) is provided with a limiting hole (230), the length axis of the limiting hole (230) intersects with the central axis of the positioning seat (111) and is perpendicular to each other, and the inner wall of the guide hole is provided with a limiting column (700), and the limiting column (700) is passed through the limiting hole (230) to limit the stroke of the tool (200).

7. The oxygen sensor tail pipe necking device according to claim 1, characterized in that: The lifting drive mechanism (120) is arranged below the workbench (110); a lifting plate (121) is arranged at the output end of the lifting drive mechanism (120); a plurality of push rods (122) distributed in a ring shape are arranged on the lifting plate (121); a avoidance hole is opened on the workbench (110) in an area corresponding to the push rods (122); the upper end of the push rod (122) is passed through the avoidance hole and extends to the top of the workbench (110); the upper end of the push rod (122) is connected to the locking plate (300); and the diameter of the conical surface (310) is larger at the top and smaller at the bottom.

8. The oxygen sensor tail pipe shrinking device according to claim 7, characterized in that: The lower surface of the workbench (110) is connected to a plurality of vertical rods (130), the lower ends of the vertical rods (130) are connected to the body of the lifting drive mechanism (120), and the lifting plate (121) is connected to a plurality of guide sleeves (140), and the plurality of guide sleeves (140) are respectively sleeved on the plurality of vertical rods (130).

9. The oxygen sensor tail pipe shrinking device according to claim 1, characterized in that: The invention also comprises a protective cover (800), wherein the protective cover (800) is disposed on the locking plate (300), and a funnel-shaped guide opening (810) is provided on the top of the protective cover (800), wherein the guide opening (810) faces the positioning seat (111) to guide the oxygen sensor (10) to fall on the positioning seat (111).

10. The oxygen sensor tail pipe necking device according to claim 1, characterized in that: The workbench (110) is provided with a mounting hole, the positioning seat (111) is tubular, the positioning seat (111) is vertically mounted in the mounting hole, the tube cavity of the positioning seat (111) is used for the lower end of the oxygen sensor (10) to pass through, and the upper end surface of the positioning seat (111) is used to support the boss (12) of the oxygen sensor (10).

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