Oxygen sensor powder pressing and dotting device

Abstract

The utility model discloses a powder pressing and dotting device for an oxygen sensor, which relates to the technical field of sensors and comprises a worktable, a positioning seat, a first lifting driving mechanism, a second lifting driving mechanism, a base, a locking disc and a plurality of cutters. The output end of the first lifting driving mechanism is connected with a positioning seat; the positioning seat is used for positioning a shell of the oxygen sensor; the base is arranged above the positioning seat, a pressing head which is matched with the positioning seat to clamp and press a sealing element in a shell is arranged on the base, the cutters are annularly distributed by taking the central axis of the positioning seat as the center, each cutter is provided with a cutter head and an inclined surface, the opening locking disc is movably sleeved on the base, and the inner wall of the opening locking disc is a conical surface. The output end of the second lifting driving mechanism is connected with the locking disc, the second lifting driving mechanism drives the locking disc to descend, and the conical face abuts against all the inclined faces so that all the tool bits can be driven to synchronously clamp and press the shell, concave points can be machined in the shell, the powder pressing and dotting procedures of the oxygen sensor can be completed, the number of operation steps is small, and the machining efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a powder pressing and dotting device for an oxygen sensor. Background Art

[0002] An 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 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. When manufacturing an oxygen sensor, a ceramic ring, a talcum powder ring, and another ceramic ring are sleeved on a chip to form a core component. Then, the core component is inserted into a tubular housing, and both ends of the housing are sealed with seals. Next, the two seals are clamped to crush the talcum powder ring, and the talcum powder fills the gaps in the housing, enabling the chip to be sealed, completing the powder pressing work. Finally, dotting is performed on the peripheral wall of the housing to form a plurality of concave points on the peripheral wall of the housing. At present, a special clamping tool is used for powder pressing operations, and then a stamping mechanism is used to dot the housing. It is necessary to continuously transfer and adjust the position and placement angle of the housing, with many steps and low efficiency. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a powder pressing and dotting device for an oxygen sensor, which can improve the processing efficiency of the oxygen sensor.

[0004] A powder pressing and dotting device for an oxygen sensor according to an embodiment of the utility model includes a frame, a positioning seat, and a dotting mechanism. A workbench, a first lifting drive mechanism, and a second lifting drive mechanism are provided on the frame; the output end of the first lifting drive mechanism faces upward and is connected to the positioning seat. The positioning seat has a vertical central axis and is used for positioning the housing of the oxygen sensor. The dotting mechanism includes a base, a locking disc, and a plurality of cutting tools. The base is arranged above the positioning seat. The base is annular. A pressing head that cooperates with the positioning seat to clamp the seal inside the housing is provided in the central hole of the base. The plurality of cutting tools can be slidably arranged on the peripheral wall of the base, and the plurality of cutting tools are annularly distributed around the central axis of the positioning seat. A cutting head is provided at one end of the cutting tool, and an inclined surface is provided at the other end of the cutting tool. The locking disc is movably sleeved on the base. The inner wall of the locking disc is a conical surface. The output end of the second lifting drive mechanism is connected to the locking disc. The second lifting drive mechanism drives the locking disc to descend, and 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 cutting heads synchronously clamp the housing to process concave points on the housing.

[0005] At least has the following beneficial effects:

[0006] Then the first lifting drive mechanism drives the positioning seat to rise, so that the housing on the positioning seat extends into the central hole of the base from bottom to top, and further makes the pressing head abut against the seal above the housing. The first lifting drive mechanism continues to drive the positioning seat to rise, and the pressing head and the positioning seat clamp the two seals, so that the talcum powder ring in the housing is broken, completing the powder pressing work or process. Then, the second lifting drive mechanism drives the locking disc to descend, and the conical surface of the locking disc abuts against all the inclined surfaces. The second lifting drive mechanism continues to drive the locking disc to descend. Under the combined action of the conical surface and the inclined surfaces, the vertical movement of the locking disc is converted into the horizontal movement of the tool. The locking disc simultaneously drives all the tools to move towards the central axis of the positioning seat, so that all the tool heads synchronously clamp the housing, thereby machining concave points on the housing and completing the dotting work or process. The second lifting drive mechanism drives the locking disc to descend, realizing the drive of the tool to move in the horizontal plane direction, making the structure of the entire oxygen sensor powder pressing and dotting device compact and relatively simple. Compared with the scheme of setting a horizontal linear drive mechanism, it occupies less floor area, is small in volume, light in weight, and is convenient for installation and maintenance. Placing the housing carrying the core component and the two seals on the positioning seat, the first lifting drive mechanism and the second lifting drive mechanism act successively to complete the powder pressing and dotting processes of the oxygen sensor, with fewer operation steps and high processing efficiency.

[0007] According to some embodiments of the present invention, the base and the positioning seat are coaxially arranged. A plurality of guiding holes are formed on the peripheral wall of the base. The central axes of the plurality of guiding holes intersect and are perpendicular to the central axis of the positioning seat. The plurality of tools are respectively inserted into the plurality of guiding holes, and the tool heads extend into the central hole of the base, and the inclined surfaces are located outside the base.

[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 tools and the base to force the tools away from the central axis of the positioning seat.

[0009] According to some embodiments of the present invention, the base includes a support ring and a limiting ring arranged on the lower surface of the support ring. The guiding 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 base. The elastic members are arranged at the bottom of the receiving grooves, and sliders are arranged in the receiving grooves. One end of the elastic member abuts against the tool through the slider.

[0011] According to some embodiments of the present utility model, a limiting hole is provided on the tool, the length direction of the limiting hole intersects and is perpendicular to the central axis of the positioning seat, a limiting member is provided on the inner wall of the guiding hole, and the limiting member passes through the limiting hole to limit the stroke of the tool.

[0012] According to some embodiments of the present utility model, the second lifting drive mechanism is arranged above the workbench, the output end of the second lifting drive mechanism faces downward and is connected with a first guiding slide plate, a plurality of pressing rods distributed in a ring shape are arranged on the first guiding slide plate, the lower ends of the plurality of pressing rods are all connected with the lock mouth disc, and the diameter of the conical surface is smaller at the top and larger at the bottom.

[0013] According to some embodiments of the present utility model, a support plate located above the positioning seat is connected to the frame, the base is arranged on the support plate, a plurality of vertically arranged first guiding rods are arranged on the support plate, the upper ends of the first guiding rods are connected with the body of the second lifting drive mechanism, and a plurality of first guide sleeves are connected to the first guiding slide plate, and the plurality of first guide sleeves are respectively sleeved on the plurality of first guiding rods.

[0014] According to some embodiments of the present utility model, a plurality of vertically arranged second guiding rods are connected to the upper surface of the workbench, the output end of the first lifting drive mechanism is connected with the positioning seat through a second guiding slide plate, and a plurality of second guide sleeves respectively sleeved on the plurality of second guiding rods are connected to the second guiding slide plate.

[0015] According to some embodiments of the present utility model, a central hole is provided at the upper end of the positioning seat, a connector communicating with the central hole is provided on the side wall of the positioning seat, the connector is used for communicating with an external suction device, and the suction device is used for sucking away the talcum powder that the oxygen sensor falls into the central hole.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will 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 the tool according to the embodiment of the present utility model;

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

[0021] Figure 4 Schematic cross-sectional structure diagram of the locking disk, base, second lifting drive mechanism, first guiding slide plate, support plate and cutter according to an embodiment of the present utility model;

[0022] Figure 5 is Figure 4 Partial enlarged schematic view at position A in

[0023] Figure 6 Schematic structure diagram of the locking disk, slider, cutter and base according to an embodiment of the present utility model;

[0024] Figure 7 Schematic structure diagram of the support ring, slider, cutter and elastic member according to an embodiment of the present utility model;

[0025] Reference numerals in the drawings:

[0026] Oxygen sensor 10; housing 11; indentation 12;

[0027] Frame 100; workbench 110; first lifting drive mechanism 120; second guiding slide plate 121; pressure sensor 122; second lifting drive mechanism 130; first guiding slide plate 131; pressure rod 132; support plate 140; first guiding rod 150; first guiding sleeve 160; second guiding rod 170; second guiding sleeve 180;

[0028] Positioning seat 200; adapter 210;

[0029] Base 300; support ring 310; limiting ring 320; receiving groove 330; pressing head 340;

[0030] Locking disk 400; conical surface 410;

[0031] Cutter 500; cutter head 510; inclined surface 520; limiting hole 530;

[0032] Elastic member 600;

[0033] Limiting member 700;

[0034] Slider 800;

[0035] Limiting adjustment member 900. Detailed implementation manners

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring 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.

[0037] In the description of the present utility model, it should be understood that when it comes to orientation descriptions, such as the orientations or positional relationships indicated by up, down, front, back, left, right, etc., they are based on the orientations or positional relationships shown in the drawings. This 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. Therefore, it should not be construed as a limitation to the present utility model.

[0038] In the description of the present utility model, "a plurality of" refers to more than two. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0039] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense. 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.

[0040] See Figure 1 , the oxygen sensor 10 is a known processed product. The oxygen sensor 10 includes a housing 11, and a plurality of concave points 12 distributed in a ring shape are machined on the housing 11.

[0041] See Figure 3 , the present utility model discloses an oxygen sensor powder pressing and dotting device, which includes a frame 100, a positioning seat 200 and a dotting mechanism. A workbench 110, a first lifting drive mechanism 120 and a second lifting drive mechanism 130 are provided on the frame 100; the output end of the first lifting drive mechanism 120 faces upward and is connected to the positioning seat 200. The positioning seat 200 has a vertical central axis, and the positioning seat 200 is used to position the housing 11 of the oxygen sensor 10.

[0042] See Figure 2 , Figures 4 to 7, the dotting mechanism includes a base 300, a locking disk 400, and multiple cutters 500. The base 300 is disposed above the positioning seat 200. The base 300 is annular. A pressing head 340 that cooperates with the positioning seat 200 to clamp the seal within the housing 11 is provided in the central hole of the base 300. The multiple cutters 500 are slidably disposed on the peripheral wall of the base 300, and the multiple cutters 500 are annularly distributed centered on the central axis of the positioning seat 200. A cutter head 510 is provided at one end of the cutter 500, and an inclined surface 520 is provided at the other end of the cutter 500. The locking disk 400 is movably sleeved on the base 300. The inner wall of the locking disk 400 is a conical surface 410. The output end of the second lifting drive mechanism 130 is connected to the locking disk 400. The second lifting drive mechanism 130 drives the locking disk 400 to descend. The conical surface 410 abuts against all the inclined surfaces 520 to drive all the cutters 500 to move toward the central axis of the positioning seat 200. All the cutter heads 510 simultaneously clamp the housing 11 to machine indentations 12 on the housing 11.

[0043] In the initial state, the base 300 is above the positioning seat 200, the positioning seat 200 is at the low point, the conical surface 410 does not abut against all the inclined surfaces 520, and the locking disk 400 is at the high point. In the working state, the housing 11 of the oxygen sensor 10 is vertically placed on the positioning seat 200. At this time, the core assembly and the two seals are both within the housing 11, and the seal below the housing 11 abuts against the positioning seat 200. Then the first lifting drive mechanism 120 drives the positioning seat 200 to rise, so that the housing 11 on the positioning seat 200 extends into the central hole of the base 300 from bottom to top, and further the pressing head 340 abuts against the seal above the housing 11. The first lifting drive mechanism 120 continues to drive the positioning seat 200 to rise, and the pressing head 340 and the positioning seat 200 clamp the two seals, thereby causing the talcum powder ring within the housing 11 to break, completing the powder pressing work or process.

[0044] Then, the second lifting drive mechanism 130 drives the locking disk 400 to descend. The conical surface 410 of the locking disk 400 abuts against all the inclined surfaces 520. The second lifting drive mechanism 130 continues to drive the locking disk 400 to descend. Under the combined action of the conical surface 410 and the inclined surface 520, the vertical movement of the locking disk 400 is converted into the horizontal movement of the cutter 500. The locking disk 400 simultaneously drives all the cutters 500 to move toward the central axis of the positioning seat 200, so that all the cutter heads 510 simultaneously clamp the housing 11, thereby machining indentations 12 on the housing 11 and completing the dotting work or process.

[0045] The second lifting drive mechanism 130 drives the locking disk 400 to descend, realizing the movement of the driving tool 500 in the horizontal plane direction, making the structure of the entire oxygen sensor powder pressing and dotting device compact and relatively simple. Compared with the scheme of setting a horizontal linear drive mechanism, it occupies less floor area, is small in size, light in weight, and is convenient for installation and maintenance.

[0046] Place the housing 11 carrying the core component and two seals on the positioning seat 200. The first lifting drive mechanism 120 and the second lifting drive mechanism 130 act successively to complete the powder pressing and dotting processes of the oxygen sensor 10, with fewer operation steps and high processing efficiency.

[0047] See Figure 6 and Figure 7 In this embodiment, the number of the tools 500 is six. The six tools 500 have the same structure and are annularly distributed on the same horizontal plane. The included angle between any two adjacent tools 500 is 60°. The six tools 500 make six concave points 12 on the housing 11.

[0048] See Figure 2 It can be understood that the tool head 510 is in the shape of an arc-shaped protrusion. One end face of the tool 500 is an arc surface, and the radius of the arc surface matches the radius of the housing 11, so that the arc surface and the outer circular surface of the housing 11 can be closely attached.

[0049] In some of the embodiments, the base 300 and the positioning seat 200 are coaxially arranged. The pressing head 340 also has a vertical central axis, and the central axis of the pressing head 340 is coaxially arranged with the central axis of the positioning seat 200.

[0050] See Figures 4 to 7 As shown in, a plurality of guide holes are formed in the peripheral wall of the base 300. The central axes of the plurality of guide holes intersect and are perpendicular to the central axis of the positioning seat 200. The plurality of tools 500 are respectively inserted into the plurality of guide holes, the tool head 510 extends into the central hole of the base 300, and the inclined surface 520 is located outside the base 300. The base 300 serves to support the plurality of tools 500 and position the heights of the plurality of tools 500. The guide holes serve to guide the moving direction of the tools 500, so that all the tools 500 can move towards the central axis direction of the positioning seat 200 or move away from the central axis direction of the positioning seat 200.

[0051] 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 200 as the center, and the included angles between all adjacent two guide holes are equal.

[0052] See Figure 5 and Figure 7, in some of these embodiments, the oxygen sensor powder pressing and dotting device further includes a plurality of elastic members 600. Two ends of the elastic member 600 respectively abut against or are connected to the tool 500 and the base 300. When the tool 500 processes the concave points 12 on the housing 11 or in the initial state, the conical surface 410 is far from the inclined surface 520, that is, there is a large distance between the conical surface 410 and the inclined surface 520. Without the locking disc 400 applying force to the tool 500, the elastic member 600 can force the tool 500 to move in a direction away from the central axis of the positioning seat 200, so that the tool 500 is far from the central axis of the positioning seat 200, completing the reset of the tool 500 and preparing for the next processing of the concave points 12.

[0053] In some of these embodiments, the base 300 includes a support ring 310 and a limit ring 320 provided on the lower surface of the support ring 310. A guiding hole is formed between the support ring 310 and the limit ring 320, and the tool 500 can be installed and disassembled by disassembling the support ring 310 and the limit ring 320.

[0054] See Figure 5 and Figure 6 , in some of these embodiments, a plurality of receiving grooves 330 are formed on the outer circumferential wall of the base 300. The elastic member 600 is arranged at the bottom of the receiving groove 330. A slider 800 is arranged in the receiving groove 330. One end of the slider 800 slides in the receiving groove 330, and the other end of the slider 800 extends out of the receiving groove 330 and can abut against the tool 500, that is, one end of the elastic member 600 abuts against the tool 500 through the slider 800. The receiving groove 330 functions to limit the elastic member 600 and the slider 800, facilitating the arrangement of the elastic member 600 and the slider 800.

[0055] See Figure 6 , in this embodiment, the receiving groove 330 is a circular groove, the elastic member 600 is a spring, and the slider 800 is cylindrical.

[0056] It can be understood that an upward convex block is provided at the other end of the tool 500, making the entire tool 500 in an L shape. The position of the convex block is lower than the position of the guiding hole, and the convex block is aligned with the receiving groove 330, so that the other end of the slider 800 directly abuts against the convex block of the tool 500. The convex block also makes the end face area of the other end of the tool 500 larger, and further makes the area of the inclined surface 520 larger. There is a sliding friction between the conical surface 410 and the inclined surface 520. With a larger area of the inclined surface 520, the wear of the inclined surface 520 can be slowed down and the risk of damage to the inclined surface 520 due to extrusion can be reduced.

[0057] It is known that the inclined surface 520 of the tool 500 is a conical arc surface, that is, the inclined surface 520 can be closely attached to the conical surface 410, ensuring that the conical surface 410 can stably drive the tool 500 to move.

[0058] See also Figure 6 Specifically, the receiving groove 330 is disposed on the outer circumferential wall of the limiting ring 320 .

[0059] In another embodiment, the location of the receiving groove 330 can be changed to be set on the support ring 310, and other structures remain unchanged. The receiving groove 330 on the support ring 310 also plays the role of limiting the elastic member 600 and the slider 800, which facilitates the layout of the elastic member 600 and the slider 800.

[0060] See also Figure 2 , Figure 5 and Figure 7 In some embodiments, a limiting hole 530 is provided on the tool 500, and the length direction of the limiting hole 530 intersects with the central axis of the positioning seat 200 and is perpendicular to each other. A limiting member 700 is provided on the inner wall of the guide hole, and the limiting member 700 is passed through the limiting hole 530. The limiting member 700 limits the closest position to which the tool 500 can move in the direction of the central axis of the positioning seat 200, and the limiting member 700 also limits the farthest position to which the tool 500 can move in the direction away from the central axis of the positioning seat 200, thereby preventing the tool 500 from detaching from the guide hole and the base 300.

[0061] See also Figures 3 to 5 In some embodiments, the second lifting drive mechanism 130 is disposed above the workbench 110, the output end of the second lifting drive mechanism 130 faces downward and is connected to the first guide slide 131, the first guide slide 131 is provided with a plurality of annularly distributed pressure rods 132, and the lower ends of the pressure rods 132 are all connected to the locking plate 400. When the second lifting drive mechanism 130 drives the first guide slide 131 to rise and fall, the first guide slide 131 drives the locking plate 400 to rise and fall through the plurality of pressure rods 132. The second lifting drive mechanism 130 can be a cylinder.

[0062] The diameter of the conical surface 410 is smaller at the top and larger at the bottom. The upper end of the inclined surface 520 is closer to the central axis of the positioning seat 200 than the lower end of the inclined surface 520. The inclined surface 520 is projected upward onto the conical surface 410. When the second lifting drive mechanism 130 drives the first guide slide 131, multiple pressure rods 132 and the locking plate 400 to rise, the conical surface 410 is away from all the inclined surfaces 520. Under the action of the elastic member 600, all the tools 500 are away from the central axis of the positioning seat 200; when the second lifting drive mechanism 130 drives the first guide slide 131, multiple pressure rods 132 and the locking plate 400 to descend, the conical surface 410 abuts against all the inclined surfaces 520, and the locking plate 400 will drive all the tools 500 to move toward the central axis of the positioning seat 200 to complete the processing of the concave point 12.

[0063] The first guiding slide plate 131 is connected to various regions of the locking mouth plate 400 through multiple pressure rods 132, so that the forces on various regions of the locking mouth plate 400 are balanced, ensuring that various regions of the locking mouth plate 400 are lifted and lowered synchronously. Furthermore, the accuracy of the movement of all the cutting tools 500 towards the central axis of the positioning seat 200 is guaranteed, and finally the machining quality of the concave points 12 is ensured.

[0064] See Figure 3 and Figure 4 , in some of these embodiments, a support plate 140 is connected to the frame 100 above the positioning seat 200, the base 300 is arranged on the support plate 140, and the support plate 140 serves to define the position of the base 300. The frame 100 is connected to the base 300 through the support plate 140.

[0065] Multiple vertically arranged first guiding rods 150 are provided on the support plate 140. The upper ends of the first guiding rods 150 are connected to the body of the second lifting drive mechanism 130, and the support plate 140 is connected to the body of the second lifting drive mechanism 130 through the first guiding rods 150. Multiple first guide sleeves 160 are connected to the first guiding slide plate 131, and the multiple first guide sleeves 160 are respectively sleeved on multiple first guiding rods 150. The first guiding rods 150 serve to guide the first guide sleeves 160 and the first guiding slide plate 131 to move in the up and down directions, avoiding the deviation of the first guiding slide plate 131, multiple pressure rods 132, and the locking mouth plate 400 in the horizontal plane direction.

[0066] Specifically, the upper end of the support ring 310 is connected to the lower surface of the support plate 140.

[0067] In this embodiment, both the number of the first guiding rods 150 and the number of the first guide sleeves 160 are four. One first guiding rod 150 and one first guide sleeve 160 form a first guiding mechanism, and a total of four first guiding mechanisms are formed. The four first guiding mechanisms are distributed in a rectangular shape. The number of the pressure rods 132 is four, and the four pressure rods 132 are distributed in a rectangular shape.

[0068] See Figure 3 and Figure 4 , a height-adjustable limit adjusting member 900 is provided on the support plate 140. The upper end of the limit adjusting member 900 can abut against the lower surface of the first guiding slide plate 131, thereby blocking the downward movement of the first guiding slide plate 131 and the locking mouth plate 400. That is, the limit adjusting member 900 limits the downward stroke of the first guiding slide plate 131, multiple pressure rods 132, and the locking mouth plate 400, thereby defining the position where the locking mouth plate 400 drives all the cutting tools 500 to move towards the central axis of the positioning seat 200, avoiding the situation that the size of the concave points 12 is too large due to the cutting tools 500 moving too much towards the central axis of the positioning seat 200 or the cutting tools 500 damaging the housing 11, and finally realizing the accuracy of the concave points 12.

[0069] The position-limiting adjusting member 900 is a column, and the lower end of the column is threadedly connected to the support plate 140. By rotating the column, the height of the column on the support plate 140 can be adjusted, and further the descending heights of the first guiding slide plate 131, multiple pressing rods 132 and the locking disc 400 can be adjusted.

[0070] See Figure 3 and Figure 4 , in some of these embodiments, a plurality of vertically arranged second guiding rods 170 are connected to the upper surface of the workbench 110. The output end of the first lifting driving mechanism 120 is connected to the positioning seat 200 through the second guiding slide plate 121. A plurality of second guiding sleeves 180 sleeved on the plurality of second guiding rods 170 are connected to the second guiding slide plate 121. The second guiding rods 170 play a role in guiding the second guiding sleeves 180, the second guiding slide plate 121 and the positioning seat 200 to move in the up and down direction, and prevent the second guiding slide plate 121 and the positioning seat 200 from shifting in the horizontal plane direction.

[0071] In this embodiment, the number of both the second guiding rods 170 and the second guiding sleeves 180 is four. One second guiding rod 170 and one second guiding sleeve 180 form a second guiding mechanism, and a total of four second guiding mechanisms are formed. The four second guiding mechanisms are distributed in a rectangular shape.

[0072] It can be understood that the upper ends of the second guiding rods 170 are connected to the support plate 140, and the support plate 140 is fixed to the workbench 110 through the second guiding rods 170.

[0073] A pressure sensor 122 is provided between the positioning seat 200 and the support plate 140. The magnitude of the clamping force exerted on the two sealing members by the pressing head 340 and the positioning seat 200 can be known in real time through the pressure sensor 122. The first lifting driving mechanism 120 is controlled according to the magnitude of the pressure feedback by the pressure sensor 122, so as to prevent the first lifting driving mechanism 120 from exerting too much force on the second guiding slide plate 121 and the positioning seat 200, and further prevent too much force from being exerted on the talcum powder ring, ensuring the powder pressing effect.

[0074] It can be conceived that the lower end of the compression rod 132 is connected with an annular connecting ring through a first screw, the support ring 310 is connected with the connecting ring through a second screw, a limiting groove is arranged on the lower end surface of the support ring 310, the limiting ring 320 is connected with the support ring 310 through a third screw, and a guide hole is formed by the side wall of the limiting groove and the lower end surface of the limiting ring 320. A connecting hole is arranged at the bottom of the limiting groove, one end of the limiting member 700 is provided with an external thread, the external thread is in threaded connection with the side wall of the connecting hole, the other end of the limiting member 700 faces downward and is a smooth rod, a limiting hole 530 is arranged on the tool 500, the axial direction of the limiting hole 530 is the up-down direction, the smooth rod is inserted into the limiting hole 530 from top to bottom, and the length direction of the limiting hole 530 intersects and is perpendicular to the central axis of the positioning seat 200.

[0075] Specifically, the connecting hole penetrates through the upper end surface of the support ring 310 and the bottom of the limiting groove, the connecting hole is a stepped hole with a larger upper part and a smaller lower part, an internal thread is arranged at the lower end of the connecting hole, the limiting member 700 is a fourth screw, the fourth screw has a smooth rod section, an external thread section and a head which are connected in sequence, the head is arranged at the upper end of the connecting hole, the external thread section is in threaded fit with the lower end of the connecting hole, and the smooth rod section extends outside the connecting hole and is located in the limiting groove.

[0076] When installing the oxygen sensor powder pressing and dotting device, first pass the fourth screw through the connecting hole from top to bottom and connect it with the connecting hole, so that the smooth rod section of the fourth screw extends outside the connecting hole and is located in the limiting groove, then install the connecting ring at the lower end of the compression rod 132 through the first screw, then install the support ring 310 on the connecting ring through the second screw, the tool 500 is sleeved on the smooth rod section through the limiting hole 530 and placed in the limiting groove, and then install the limiting ring 320 on the support ring 310 through the third screw.

[0077] See Figure 3 and Figure 4 , a through hole is arranged in the area of the support plate 140 corresponding to the compression rod 132, and the lower end of the compression rod 132 passes through the through hole from top to bottom and is connected with the connecting ring. See Figure 3 , the workbench 110 is connected with a backing plate through a fifth screw, the lower end of the second guide rod 170 is connected with the backing plate, that is, the second guide rod 170 is connected with the workbench 110 through the backing plate. The first lifting driving mechanism 120 is arranged below the workbench 110, and avoidance holes for the output end of the first lifting driving mechanism 120 to pass through are arranged on both the workbench 110 and the backing plate.

[0078] See Figure 3, in some of these embodiments, a central hole is provided at the upper end of the positioning seat 200, and an adapter 210 communicating with the central hole is provided on the side wall of the positioning seat 200. The adapter 210 is used to communicate with an external suction device, and the suction device is used to suck away the talcum powder that has fallen into the central hole by the oxygen sensor 10. The talcum powder here is accidentally leaked out after the talcum powder ring in the housing 11 is broken. Sucking away the talcum powder that has fallen into the central hole can prevent the talcum powder from affecting the powder pressing and dotting of the next oxygen sensor 10.

[0079] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of 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 recorded in this specification.

[0080] Of course, the present invention is not limited to the above embodiments. Those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An oxygen sensor powder pressing device, characterized in that: include: A frame (100) is provided with a workbench (110), a first lifting drive mechanism (120) and a second lifting drive mechanism (130); a positioning seat (200), wherein the output end of the first lifting drive mechanism (120) faces upward and is connected to the positioning seat (200), the positioning seat (200) has a vertical central axis, and the positioning seat (200) is used to position a housing (11) of the oxygen sensor (10); The dotting mechanism comprises a base (300), a locking plate (400) and a plurality of knives (500), wherein the base (300) is arranged above the positioning seat (200), the base (300) is annular, a pressing head (340) is arranged in the center hole of the base (300) and cooperates with the positioning seat (200) to clamp the sealing member in the housing (11), the plurality of knives (500) are slidably arranged on the peripheral wall of the base (300), and the plurality of knives (500) are distributed in annular shape with the central axis of the positioning seat (200) as the center, a knife head (510) is arranged on one end of the knife (500), and the other end of the knife (500) is provided with a knife head (510). An inclined surface (520) is provided on the end head, the locking disk (400) is movably mounted on the base (300), the inner wall of the locking disk (400) is a conical surface (410), the output end of the second lifting drive mechanism (130) is connected to the locking disk (400), the second lifting drive mechanism (130) drives the locking disk (400) to descend, the conical surface (410) abuts against all the inclined surfaces (520) to drive all the tools (500) to move toward the central axis of the positioning seat (200), and all the tool heads (510) synchronously clamp the shell (11) to process a concave point (12) on the shell (11).

2. The oxygen sensor powder pressing device according to claim 1, characterized in that: The base (300) is coaxially arranged with the positioning seat (200), and a plurality of guide holes are opened on the peripheral wall of the base (300). The central axes of the plurality of guide holes intersect with the central axis of the positioning seat (200) and are perpendicular to each other. The plurality of cutting tools (500) are respectively inserted into the plurality of guide holes, and the cutting head (510) extends into the central hole of the base (300). The inclined surface (520) is located on the outer side of the base (300).

3. The oxygen sensor powder pressing device according to claim 2, characterized in that: It also includes a plurality of elastic members (600), the two ends of which are respectively against or connected to the tool (500) and the base (300) to force the tool (500) to move away from the central axis of the positioning seat (200).

4. The oxygen sensor powder pressing device according to claim 3, characterized in that: The base (300) comprises a support ring (310) and a limiting ring (320) arranged on the lower surface of the support ring (310), and the guide hole is formed between the support ring (310) and the limiting ring (320).

5. The oxygen sensor powder pressing device according to claim 3 or 4, characterized in that: A plurality of receiving grooves (330) are provided on the outer circumferential wall of the base (300), the elastic member (600) is arranged in the groove bottom of the receiving groove (330), a sliding block (800) is provided in the receiving groove (330), and one end of the elastic member (600) is pressed against the tool (500) through the sliding block (800).

6. The oxygen sensor powder pressing device according to any one of claims 2 to 4, characterized in that: The tool (500) is provided with a limiting hole (530), the length direction of the limiting hole (530) intersects with the central axis of the positioning seat (200) and is perpendicular to each other, and the inner wall of the guide hole is provided with a limiting member (700), and the limiting member (700) is passed through the limiting hole (530) to limit the stroke of the tool (500).

7. The oxygen sensor powder pressing device according to claim 1, characterized in that: The second lifting drive mechanism (130) is arranged above the workbench (110), the output end of the second lifting drive mechanism (130) faces downward and is connected to a first guide slide (131), a plurality of pressure rods (132) distributed in a ring shape are arranged on the first guide slide (131), the lower ends of the plurality of pressure rods (132) are connected to the locking plate (400), and the diameter of the conical surface (410) is smaller at the top and larger at the bottom.

8. The oxygen sensor powder pressing device according to claim 7, characterized in that: The frame (100) is connected to a support plate (140) located above the positioning seat (200); the base (300) is arranged on the support plate (140); a plurality of vertically arranged first guide rods (150) are arranged on the support plate (140); the upper ends of the first guide rods (150) are connected to the body of the second lifting drive mechanism (130); a plurality of first guide sleeves (160) are connected to the first guide slide plate (131); and the plurality of first guide sleeves (160) are respectively sleeved on the plurality of first guide rods (150).

9. The oxygen sensor powder pressing device according to claim 1, 7 or 8, characterized in that: The upper surface of the workbench (110) is connected to a plurality of vertically arranged second guide rods (170); the output end of the first lifting drive mechanism (120) is connected to the positioning seat (200) via a second guide slide plate (121); and the second guide slide plate (121) is connected to a plurality of second guide sleeves (180) respectively sleeved on the plurality of second guide rods (170).

10. The oxygen sensor powder pressing device according to claim 1, characterized in that: The upper end of the positioning seat (200) is provided with a central hole, and the side wall of the positioning seat (200) is provided with an adapter (210) connected to the central hole, and the adapter (210) is used to communicate with an external suction device, and the suction device is used to absorb the talcum powder that falls into the central hole of the oxygen sensor (10).

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