Short-oxygen powder pressing mechanism of nitrogen-oxygen sensor

Abstract

The utility model belongs to the technical field of assembly of nitrogen-oxygen sensors, and particularly discloses a short-oxygen powder pressing mechanism of a nitrogen-oxygen sensor, which comprises a base module, a limiting module, a powder pressing module and a necking module, the limiting module comprises a sliding rail support and a sliding support, an inserting hole used for installing a product is formed in an upper-layer installing plate, and a jacking electric cylinder is installed on a lower-layer installing plate of the sliding support. The powder pressing module comprises a rack, a powder pressing electric cylinder and a pressing head; the necking-down module comprises a necking-down base, a necking-down disc, a sliding plate, a rotating disc, a cutting die sliding block, a necking-down cutting die and a driving piece. A plurality of sliding grooves are evenly formed in the sliding plate in the circumferential direction of the sliding plate, a plurality of driving grooves are formed in the inner side face of the rotary disc, cam faces are arranged in the driving grooves, and one ends of the cutting die sliding blocks make contact with the cam faces. And the upper part and the lower part of the end part of the necking cutting die are respectively a middle necking head and a tail necking head. According to the utility model, powder pressing packaging and necking of the middle part of the tail of the base can be completed in one step, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembling nitrogen and oxygen sensors, in particular to a short oxygen powder pressing mechanism of a nitrogen and oxygen sensor. Background Art

[0002] like Fig.11 and Fig.12 As shown, the short oxygen component of the nitrogen oxide sensor includes a ceramic chip, a base, a base tail, a ceramic ring 1, a ceramic ring 2, a ceramic ring 3, a powder ring 1, a powder ring 2 and a gasket. The ceramic chip is encapsulated in the base by squeezing the powder ring 1 and the powder ring 2.

[0003] The short oxygen powder packaging of the existing nitrogen oxygen sensor is completed in four steps. In the first step, the powder pressing device is in standby mode, and the short oxygen component is manually placed on the powder pressing device; in the second step, the powder pressing device is started, and the powder pressing mechanism compresses the short oxygen component to the set position; in the third step, the shrinking mechanism fixes the tail rivet point of the base; in the fourth step, the powder pressing device returns to standby mode, and the short oxygen component is manually taken out. However, this solution has the following problems:

[0004] 1. As Fig.13 and Fig.14 As shown, the existing short oxygen powder pressing process has a single function, which can only perform powder sealing on the powder ring and tail shrinkage on the base tail, but cannot perform middle shrinkage on the base tail. After the product is pressed, the middle shrinkage of the base tail needs to be performed again, and the production and processing is relatively complicated.

[0005] 2. The height of the ceramic chip cannot be detected during the short oxygen powder pressing process, and the height detection information of the ceramic chip cannot be fed back to the powder pressing mechanism in time, so the height consistency of the ceramic chip is poor.

[0006] 3. The ceramic chip has no radial limit, and the ceramic chip is easy to deviate after powder pressing, resulting in bending and fracture. Summary of the invention

[0007] The utility model provides a short oxygen powder pressing mechanism for a nitrogen oxygen sensor, aiming to integrate the process of powder pressing and packaging of a short oxygen component and shrinking the middle part of a base tail into one step, thereby improving production efficiency and reducing production costs.

[0008] The utility model is realized by the following technical scheme: a short oxygen powder pressing mechanism of a nitrogen oxygen sensor, comprising a base module, a limit module, a powder pressing module and a shrinking module;

[0009] The base module includes a machine base, and the limiting module, the powder pressing module and the shrinking module are all located on the machine base;

[0010] The limit module includes a slide rail support and a sliding bracket, the sliding bracket is connected to the slide rail support, the sliding bracket is in a [ shape, the sliding bracket includes an upper mounting plate and a lower mounting plate, the upper mounting plate is provided with a socket for mounting the product, the lower mounting plate is provided with a lifting electric cylinder, and the output shaft of the lifting electric cylinder is coaxially arranged with the socket;

[0011] The powder pressing module comprises a frame, a powder pressing electric cylinder and a pressing head, wherein the powder pressing electric cylinder is installed in the middle position of the frame and is coaxially arranged with the jack, and the pressing head is installed on the output shaft of the powder pressing electric cylinder;

[0012] The shrinking module comprises a shrinking base, a shrinking plate, a slide plate, a turntable, a die block, a shrinking die block and a driving member for driving the turntable to rotate, wherein the shrinking base is mounted on the machine base, and the shrinking plate is mounted on the shrinking base; the turntable is located inside the shrinking plate, and the slide plate is located inside the turntable and below the turntable;

[0013] The slide plate is evenly provided with a plurality of slide grooves along its circumference, and the slide grooves extend radially along the slide plate, and the knife die slider and the shrinking knife die are both provided with a plurality of them, and the plurality of shrinking knife dies are connected to the ends of the plurality of knife die sliders, and the plurality of knife die sliders are respectively slidably matched with the plurality of slide grooves, and the inner side surface of the turntable is provided with a plurality of driving grooves, and the driving groove is provided with a cam surface, one end of the knife die slider is located in the driving groove and contacts the cam surface, and when the driving member drives the turntable to rotate, it can push the plurality of knife die sliders to move along the cam surface and retract inward; the upper and lower ends of the shrinking knife die are respectively the middle shrinking head and the tail shrinking head.

[0014] In this solution, the powder pressing module can press powder and package the product, and the base of the product can be shrunken when the knife die module is driven inward by the driving member in the necking module. Moreover, since the end of the necking knife die has two layers of necking parts, namely a middle necking head and a tail necking head, which are arranged in sequence from top to bottom, when the knife die module is driven to shrink toward the center, the middle and tail of the product base can be shrunken at the same time, thereby effectively improving the production efficiency.

[0015] This solution integrates the process of powder packaging of the short oxygen component and the shrinkage of the middle part of the base tail into one step, which can effectively improve production efficiency and reduce production costs.

[0016] Furthermore, the sliding bracket is vertically slidably matched with the slide rail support, a lifting cylinder is installed on the machine base, and the output shaft of the lifting cylinder is connected to the lower mounting plate of the sliding bracket.

[0017] Furthermore, the lower mounting plate of the sliding bracket is connected to a support block, a channel is coaxially opened on the support block, the output shaft of the lifting electric cylinder is located in the channel and can slide vertically along the channel, and a clamping cylinder is installed on the support block, and the clamping cylinder has a clamping claw, and the clamping claw can clamp the ceramic chip of the product.

[0018] Furthermore, a detection sensor is installed on the upper mounting plate of the sliding bracket.

[0019] Furthermore, an adapter block is connected to the output shaft of the powder pressing electric cylinder, and guide rods are vertically connected to the left and right sides of the adapter block. The upper end of the guide rod passes through the frame and vertically slides with the frame. A pressure sensor is connected to the bottom of the adapter block and located in the center thereof, and the pressure head is installed at the bottom of the pressure sensor.

[0020] Furthermore, a height sensor is installed on the pressure head.

[0021] Furthermore, the cam surface includes a first curved surface segment and a second curved surface segment, the slope of the first curved surface segment is greater than the slope of the second curved surface segment, and the second curved surface segment smoothly transitions to the inner side surface of the rotating disk.

[0022] Furthermore, a connecting arm is connected to the outer side of the turntable, the driving member is a shrinking electric cylinder, and the output shaft of the shrinking electric cylinder is hinged to the connecting arm.

[0023] Furthermore, the first curved surface segment is connected to the second curved surface segment by a circular arc transition.

[0024] Furthermore, a cover plate is connected to the top of the shrinking disk, and a through hole is opened in the center of the cover plate.

[0025] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0026] 1. The three process steps of powder packaging of short oxygen components, shrinkage of the middle part of the base tail and height detection of the ceramic chip are integrated into one step to improve production efficiency and reduce production costs.

[0027] 2. Integrating the powder packaging of the short oxygen component and the tail and middle shrinkage of the base into one step can reduce the product handling process, improve the coaxiality of the tail shrinkage and the middle shrinkage of the base tail, reduce the risk of ceramic chip breakage, and improve the consistency and stability of product powder pressing.

[0028] 3. The pressure sensor and height sensor are designed on the press head to monitor the pressure and chip height during the powder pressing process and provide timely feedback. During the powder pressing process, the height detection feedback of the ceramic chip is added to improve the height consistency of the ceramic chip. After the powder pressing is completed, the height sensor will detect the protruding height of the chip and record the data.

[0029] 4. The setting of the clamping cylinder in the utility model can enable the clamping claws to clamp the ceramic chip, clamp the ceramic chip when pressing the powder, and increase the radial limit of the ceramic chip, which can improve the positioning of the ceramic chip and reduce the risk of bending and fracture of the ceramic chip.

[0030] 5. The inner side of the turntable of the necking module is designed to be a curved surface. The first section of the curved surface has a larger slope. When the turntable rotates, the die cutter can move quickly to contact the outer wall of the tail of the base. The second section of the curved surface has a smaller slope. When the turntable rotates, the die cutter can move slowly to make the tail of the base shrink and deform slowly and evenly, so as to prevent the product from being damaged by the impact force of the die cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0032] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0033] Figure 2 It is a front view of an embodiment of the utility model;

[0034] Figure 3 A three-dimensional diagram of a position limiting module in an embodiment of the utility model;

[0035] Figure 4 It is a cross-sectional view of the embodiment of the utility model in the standby state;

[0036] Figure 5 A cross-sectional view of the working state of the embodiment of the utility model;

[0037] Figure 6 This is a schematic diagram of the standby state of the shrinking module of the embodiment of the utility model;

[0038] Figure 7 This is a schematic diagram of the working state of the necking module in the embodiment of the utility model;

[0039] Figure 8 This is a structural diagram of the inner side of the turntable of the necking module of the embodiment of the utility model;

[0040] Fig. 9 This is a schematic diagram of the short oxygen powder pressing process of the embodiment of the utility model;

[0041] Fig.10It is a schematic diagram of the tail necking and the middle necking of the base tail of the embodiment of the utility model;

[0042] Fig.11 It is a cross-sectional view of the short oxygen of the nitrogen oxide sensor;

[0043] Fig.12 This is a schematic diagram of the nitrogen and oxygen sensor after short oxygen pressure powder;

[0044] Fig.13 It is a schematic diagram of the working state of the tail end of the base being narrowed in the prior art;

[0045] Fig.14 It is a schematic diagram of the working state of the middle part of the tail of the base in the prior art.

[0046] Marks and corresponding parts names in the attached drawings:

[0047] Product 1, ceramic chip 11, base 12, base tail 13, tail shrinkage 131, middle shrinkage 132, ceramic ring 1 14, ceramic ring 2 15, ceramic ring 3 16, powder ring 1 17, powder ring 2 18, gasket 19;

[0048] Machine base 211, electric cylinder support 212, shrinking electric cylinder 213, lifting cylinder 214;

[0049] Slide rail support 221, slide rail 222, slide bracket 223, detection sensor 224, lifting electric cylinder 225, support block 226, clamping cylinder 227, guide surface 228, and socket 229;

[0050] Support column 231, cross beam 232, powder pressing cylinder 233, adapter block 234, guide rod 235, pressure sensor 236, pressure head 237, height sensor 238;

[0051] Narrowing base 241, shrinking disk 242, slide plate 243, turntable 244, first curved surface segment 2441, second curved surface segment 2442, third curved surface segment 2443, fourth curved surface segment 2444, cutting die slider 245, shrinking cutting die 246, tail shrinking head 2461, middle shrinking head 2462, shrinking disk cover 247, connecting arm 248, ball bearing 249. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0053] like Fig.11 and Fig.12As shown, the product 1 in this embodiment is a nitrogen oxide sensor, which includes a ceramic chip 11, a base 12, a base tail 13, a ceramic ring 14, a ceramic ring 2 15, a ceramic ring 3 16, a powder ring 17, a powder ring 2 18 and a gasket 19.

[0054] like Figure 1-Figure 12 As shown, this embodiment provides a short oxygen powder pressing mechanism for a nitrogen oxygen sensor, including a base module, a limit module, a powder pressing module and a shrinking module;

[0055] The base module includes a machine base 211, on which the limiting module, the powder pressing module and the necking module are all located. In this embodiment, the machine base 211 in the base module is designed as a platform structure, and the necking module is installed in the middle position on the platform surface of the machine base 211; the limiting module is installed directly behind the necking module; and the powder pressing module is installed directly above the necking module.

[0056] The limit module includes a slide rail support 221 and a sliding bracket 223, and the sliding bracket 223 is connected to the slide rail support 221. Figure 3 As shown, the sliding bracket 223 is in a [ shape, and the sliding bracket 223 includes an upper mounting plate, a lower mounting plate and a vertical plate. The upper mounting plate and the lower mounting plate are vertically connected to the vertical plate to form a [ shape. In this embodiment, the upper mounting plate, the lower mounting plate and the vertical plate are integrally formed.

[0057] The vertical plate is connected to the slide rail support 221, and a socket 229 for installing the product 1 is provided on the upper mounting plate. The socket 229 is located on the side away from the vertical plate, and in this embodiment, a guide surface 228 that passes through the socket 229 is provided at the end of the upper mounting plate away from the vertical plate. The guide surface 228 is in an eight-shaped shape. The setting of the guide surface 228 facilitates the installation of the product 1 and plays a guiding role in the installation of the product 1. The diameter of the socket 229 is smaller than the upper diameter of the product 1 and larger than the lower diameter of the product 1, so that the product 1 can be inserted into the socket 229, and at the same time it can play a role of limiting support for the product 1.

[0058] In this embodiment, a lifting electric cylinder 225 is installed on the lower mounting plate, and the output shaft of the lifting electric cylinder 225 is coaxially arranged with the socket 229. In this embodiment, the lifting electric cylinder 225 is located on the bottom surface of the lower mounting plate, and the top surface of the lower mounting plate of the sliding bracket 223 is connected with a support block 226. A channel is coaxially opened on the support block 226, and the output shaft of the lifting electric cylinder 225 is located in the channel and can slide vertically along the channel.

[0059] In this embodiment, a clamping cylinder 227 is installed on the support block 226, and the clamping cylinder 227 is installed on the left side of the support block 226. The clamping cylinder 227 has a clamping claw, which is located in the center of the support block 226. The clamping claw can clamp the ceramic chip 11 of the product 1;

[0060] In this embodiment, a detection sensor 224 is installed on the upper mounting plate of the sliding bracket 223, and the detection sensor 224 is located at the lower part of the upper mounting plate. The detection sensor 224 is used to detect whether the product 1 is installed on the upper mounting plate.

[0061] The powder pressing module includes a frame, a powder pressing electric cylinder 233 and a pressing head 237. The powder pressing electric cylinder 233 is installed in the middle position of the frame and is coaxially arranged with the socket 229. The pressing head 237 is installed on the output shaft of the powder pressing electric cylinder 233. Specifically: in this embodiment, the frame includes two support columns 231 and a cross beam 232. The two support columns 231 are respectively installed on the left and right sides of the shrinking module, and the support columns 231 are vertically welded and fixed to the machine base 211. The cross beam 232 is located between the two support columns 231, and the two ends of the cross beam 232 are respectively welded and fixed to the two support columns 231 or fixed by bolts. The powder pressing electric cylinder 233 is installed in the middle position of the cross beam 232.

[0062] An adapter block 234 is connected to the output shaft of the powder pressing electric cylinder 233, and guide rods 235 are vertically connected to the left and right sides of the adapter block 234. The upper end of the guide rod 235 passes through the frame and vertically slides with the frame. A pressure sensor 236 is connected to the bottom of the adapter block 234 and located in the center thereof. A pressure head 237 is installed at the bottom of the pressure sensor 236. In this embodiment, a height sensor 238 is installed on the pressure head 237, and the height sensor 238 is installed in the middle position of the pressure head 237.

[0063] The shrinking module includes a shrinking base 241, a shrinking plate 242, a slide plate 243, a turntable 244, a die slider 245, a shrinking die 246, a ball bearing 249 and a driving member for driving the turntable 244 to rotate. The shrinking base 241 is installed on the machine base 211 by bolts, and the shrinking plate 242 is installed on the shrinking base 241; Figure 4 As shown, the rotating disk 244 is located inside the shrinking disk 242, the sliding plate 243 is located inside the rotating disk 244 and the sliding plate 243 is located below the rotating disk 244. In this embodiment, a groove is opened in the center of the shrinking disk 242, and the sliding plate 243 is located in the groove and is flush with the top surface of the shrinking disk 242;

[0064] Combination Figure 6 , Figure 7 and Figure 8 As shown, eight slide grooves are evenly arranged along the circumference of the slide plate 243, and the slide grooves extend radially along the slide plate 243. There are eight knife die sliders 245 and eight shrinking knife dies 246. The eight shrinking knife dies 246 are connected to the ends of the eight knife die sliders 245. In this embodiment, the shrinking knife die 246 and the knife die sliders 245 are integrally formed, and the eight knife die sliders 245 are radially slidably matched with the eight slide grooves respectively.

[0065] The inner side surface of the rotating disk 244 is provided with eight driving grooves evenly distributed in the circumference, and a cam surface is provided in the driving groove, so that the inner side surface of the rotating disk 244 is designed to be eight groups of evenly distributed curved surface structures, and the angle between two adjacent groups of curved surface structures is 45 degrees. One end of the die-cutting slider 245 is located in the driving groove and contacts the cam surface. When the driving member drives the rotating disk 244 to rotate, it can push the eight die-cutting sliders 245 to move along the cam surface and retract inward.

[0066] like Fig.10 As shown, the upper and lower ends of the shrinking die 246 are respectively a middle shrinking end portion 2462 and a tail shrinking end portion 2461 , which respectively perform a tail shrinking 131 and a middle shrinking 132 on the base tail 13 of the product 1 .

[0067] like Figure 8 As shown, in this embodiment, the cam surface includes a first curved surface segment 2441 and a second curved surface segment 2442. The slope of the first curved surface segment 2441 is greater than the slope of the second curved surface segment 2442. The second curved surface segment 2442 smoothly transitions with the inner side surface of the rotating disk 244. The first curved surface segment 2441 and the second curved surface segment 2442 are connected in an arc transition. Specifically: Figure 8 As shown, the main part of the curved surface is composed of two curves stretched along the axial direction of the turntable 244. The starting radius R of the first curved surface segment 2441 is 110mm, the ending radius is 85mm, and the radius angle between the starting and ending points of the first curved surface segment 2441 is 10°; the starting radius R of the second curved surface segment 2442 is 85mm, the ending radius is 80mm, and the radius angle between the starting and ending points of the second curved surface segment 2442 is 27°; the chamfer R20mm between the two curved surfaces ensures that the two curved surface segments are smoothly connected. In this embodiment, a guide groove is provided at the bottom of the turntable. The side profile of the guide groove includes a third curved surface segment 2443 and a fourth curved surface segment 2444. The side profile of the guide groove is consistent with the cam surface profile on the inner side of the turntable 244. Figure 4 and Figure 5 As shown, in this embodiment, the inner ring of the ball bearing 249 is fixedly mounted on the bottom of the die cutter slider 245 , and the outer ring of the ball bearing 249 is mounted in the guide groove of the turntable 244 .

[0068] In the working state, when the turntable 244 rotates, the first curved surface segment 2441 causes the shrinking die 246 to move quickly and contact the outer wall of the base tail 13 , and the second curved surface segment 2442 causes the shrinking die 246 to move slowly and perform tail shrinking 131 and middle shrinking 132 on the base tail 13 .

[0069] Combination Figure 4 and Figure 5 As shown, the top of the shrinking disk 242 is connected to a cover plate by screws, and a through hole is opened in the center of the cover plate.

[0070] Combination Figure 6 and Figure 7 As shown, the outer side of the rotating disk 244 is connected to a connecting arm 248. In this embodiment, the connecting arm 248 is T-shaped. The side where the rotating disk 244 is connected to the connecting arm 248 is set to be a plane. The transverse part of the rotating disk 244 and the plane of the rotating disk 244 are connected by screws. In this embodiment, the driving member is a shrinking electric cylinder 213, and the output shaft of the shrinking electric cylinder 213 is hinged to the connecting arm 248. Figure 1 As shown, in this embodiment, the electric cylinder support 212 is connected to the machine base 211 by bolts, and the electric cylinder support 212 is connected to the machine base 211 by bolts. Figure 7 As shown, the shrinking electric cylinder 213 is located on the front working surface of the electric cylinder support 212 and is hinged to the electric cylinder support 212 .

[0071] In this embodiment, the support block 226 and the clamping claw are located below the shrinking die 246, so that the die slider 245 can slide inwards to drive the shrinking die 246 to shrink the tail and middle of the product 1 base tail 13 on the upper mounting plate.

[0072] In this embodiment, the shrinking module is designed as an eight-cutting die structure. When the turntable 244 rotates, the eight shrinking cutting dies 246 can be tightened at the same time, which can ensure that the base tail 13 is evenly stressed in eight directions; the die openings of the eight shrinking cutting dies 246 form a complete circle, which can make the base tail 13 deform into a complete circle.

[0073] In this embodiment, the first curved surface segment 2441 of the cam surface has a larger slope, so when the turntable 244 rotates, the cutting die can move quickly to contact the outer wall of the base tail 13; the second curved surface segment 2442 of the cam surface has a smaller slope, so when the turntable 244 rotates, the cutting die can move slowly to make the base tail 13 slowly and evenly shrink and deform, thereby preventing the product 1 from being damaged by the impact force of the cutting die.

[0074] In this embodiment, the shrinking die 246 is designed as a double-layer shrinking structure, which can shrink the tail 131 and the middle 132 of the base tail 13 at the same time during operation, thereby improving production efficiency. In this embodiment, the upper layer of the eight shrinking die dies 246 is provided with shrinking positions, and the angle between two adjacent shrinking positions is 45°, which is used to shrink the middle 132 of the base tail 13.

[0075] The lower layer of the eight shrinking cutting dies 246 is provided with only four shrinking positions, and the angle between two adjacent shrinking positions is 90°, which is used to shrink the tail 131 of the base tail 13 .

[0076] like Figure 1 and Figure 3As shown, in another embodiment, the sliding bracket 223 and the slide rail support 221 are vertically slidably matched. Specifically: the slide rail support 221 is installed directly behind the shrinking module, and the slide rail 222 is installed on the front side of the slide rail support 221. The slide rail 222 and the slide rail support 221 are fixed by bolts. A slider is connected to the vertical plate of the sliding bracket 223. In this embodiment, the slider and the sliding bracket 223 are integrally formed, and the sliding bracket 223 vertically slides with the slide rail 222 through the slider.

[0077] like Figure 4 As shown, in the standby state, the lifting cylinder 214 extends outward, and the lifting cylinder 214 lifts the sliding bracket 223 as a whole to the standby position, so that the support block 226 and the clamping cylinder 227 pass through the middle of the eight shrinking cutting dies 246 of the shrinking module; the assembled product 1 is manually placed on the working position of the upper mounting plate of the sliding bracket 223; the detection sensor 224 detects the product 1 to be processed at the working position; the lifting cylinder 214 retracts inward again, and the lifting cylinder 214 drives the sliding bracket 223 to descend to the working position, so that the support block 226 and the clamping cylinder 227 pass through the middle of the eight shrinking cutting dies 246 of the shrinking module and are located below the eight shrinking cutting dies 246.

[0078] Combination Figure 5 As shown, in the working state, when the sliding bracket 223 descends to the working position with the product 1, the powder pressing cylinder 233 in the powder pressing module extends outward, and the powder pressing cylinder 233 drives the pressure sensor 236, the pressure head 237 and the height sensor 238 to move downward. When the pressure head 237 moves to the working position, it maintains the height of the working position.

[0079] The shrinking electric cylinder 213 extends outward and drives the shrinking module to work. The shrinking electric cylinder 213 extends outward and drives the turntable 244 and the connecting arm 248 to rotate counterclockwise. The first curved surface segment 2441 and the second curved surface segment 2442 of the inner cam surface of the turntable 244 will push the cutting die slider 245 to slide inward, thereby driving the eight shrinking cutting dies 246 to move inward. The eight shrinking cutting dies 246 move along the slide groove toward the center of the slide plate 243. The tail shrinking head 2461 and the middle shrinking head 2462 on the shrinking cutting die 246 shrink the tail and the middle of the base tail 13 at the same time.

[0080] The shrinking electric cylinder 213 shrinks inwards and drives the rotating disk 244 and the connecting arm 248 to rotate clockwise. The third curved surface segment 2443 and the fourth curved surface segment 2444 of the guide groove on the rotating disk 244 will push the ball bearing 249 to slide outwards in the guide groove. The ball bearing 249 will drive the eight die sliders 245 and the shrinking die 246 to move outwards and open. The powder pressing electric cylinder 233 shrinks inwards and drives the pressure sensor 236, the pressure head 237 and the height sensor 238 to move upwards to the standby position.

[0081] During the powder pressing process, the pressure sensor 236 will monitor the pressure of the powder pressing. When the powder pressing pressure exceeds the set standard range, the pressure sensor 236 will issue an alarm and stop the entire mechanism immediately to prevent the product 1 from being unqualified or damaged by the excessive pressure. The height sensor 238 will monitor the protruding height H of the ceramic chip 11. When the protruding height H exceeds the set standard range, the height sensor 238 will issue an alarm and stop the entire mechanism immediately to prevent the product 1 from being unqualified or damaged. After the powder pressing is completed, the height sensor 238 will detect the protruding height H of the ceramic chip 11 and record the detection result of the height H.

[0082] The action logic design of the powder pressing mechanism in this embodiment can protect the shrinking die 246 from damage due to misoperation. The shrinking module can only perform the shrinking operation when the limit module is in the lowest position; when the limit module is in any other position or in motion, the shrinking module will automatically lock and cannot perform the shrinking operation.

[0083] Combination Fig. 9 As shown, the powder pressing process of product 1 is divided into two stages: pre-pressing and final pressing.

[0084] In the standby state, the lifting motor rises to the height position of the ceramic chip 11 set to limit the height, and the clamping cylinder 227 is opened.

[0085] In the pre-pressing state, the lifting motor is kept at the set position to limit the height of the ceramic chip 11, the clamping cylinder 227 clamps the ceramic chip 11 so that the ceramic chip 11 is in the center position, and the powder pressing cylinder 233 drives the pressing head 237 to move downward to the pre-pressing set position.

[0086] In the final pressure state, the lifting motor descends to avoid contact with the ceramic chip 11, the clamping cylinder 227 opens, and the powder pressing electric cylinder 233 drives the pressing head 237 to move downward to the final pressure setting position.

[0087] In the ejection state, the clamping cylinder 227 is opened, the lifting motor rises to the set height and lifts the product 1 to facilitate removal.

[0088] In another embodiment, the operation of the electric components is controlled by a controller. In the standby state, if the product 1 is not placed on the working position of the upper mounting plate of the sliding bracket 223 or the product 1 is not placed in place, the detection sensor 224 will not be able to correctly identify the product 1, and the controller will not give instructions for the next action. Therefore, the entire mechanism cannot perform the next movement and is in a locked state, which can prevent the product 1 and the shrinking die 246 from being damaged by misoperation.

[0089] In the utility model:

[0090] 1. The shrinking module is designed to be 8 shrinking modules, and the mold openings of the shrinking cutter dies 246 of the 8 shrinking modules form a complete circle. The alternative solution can be changed to 4 shrinking cutter dies, 6 shrinking cutter dies or multiple shrinking cutter dies, and the mold openings of multiple shrinking cutter dies form regular polygons or other structural shapes, which can also realize the design function.

[0091] 2. The shrinking die is designed as a double-layer structure with 8 shrinking positions on the upper layer of the die and 4 shrinking positions on the lower layer. The alternative solution is to change the number and structure of the shrinking positions of the upper and lower layers of the die as needed, and to realize the design function.

[0092] 3. Design a pressure sensor and a height sensor on the pressure head. The alternative solution can change the structure or installation position of the pressure head, pressure sensor and height sensor, and can also realize the designed function.

[0093] 4. The main structural scheme of the utility model is that after the product is put in place, the limit module moves downward to send the product into the shrinking module. An alternative scheme is to invert the entire machine, so that after the product is put in place, the assembly module moves upward to send the product into the shrinking module, or other angle designs are used to move the assembly module to send the product into the shrinking module after the product is put in place, which can also realize the machine design function.

[0094] 5. The main structural scheme of the utility model is that the necking module is fixed on the machine base, and the product is sent into the necking module by moving the limit module. An alternative scheme is to fix the limit module on the machine base, and send the product into the necking module by moving the necking module.

[0095] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A short oxygen powder pressing mechanism for a nitrogen and oxygen sensor, characterized in that: It includes a base module, a limit module, a powder pressing module and a shrinking module; The base module includes a machine base, and the limiting module, the powder pressing module and the shrinking module are all located on the machine base; The limit module includes a slide rail support and a sliding bracket, the sliding bracket is connected to the slide rail support, the sliding bracket is in a [ shape, the sliding bracket includes an upper mounting plate and a lower mounting plate, the upper mounting plate is provided with a socket for mounting the product, the lower mounting plate is provided with a lifting electric cylinder, and the output shaft of the lifting electric cylinder is coaxially arranged with the socket; The powder pressing module comprises a frame, a powder pressing electric cylinder and a pressing head, wherein the powder pressing electric cylinder is installed in the middle position of the frame and is coaxially arranged with the jack, and the pressing head is installed on the output shaft of the powder pressing electric cylinder; The shrinking module comprises a shrinking base, a shrinking plate, a slide plate, a turntable, a die block, a shrinking die block and a driving member for driving the turntable to rotate, wherein the shrinking base is mounted on the machine base, and the shrinking plate is mounted on the shrinking base; the turntable is located inside the shrinking plate, and the slide plate is located inside the turntable and below the turntable; The slide plate is evenly provided with a plurality of slide grooves along its circumference, and the slide grooves extend radially along the slide plate, and the knife die slider and the shrinking knife die are both provided with a plurality of them, and the plurality of shrinking knife dies are connected to the ends of the plurality of knife die sliders, and the plurality of knife die sliders are respectively slidably matched with the plurality of slide grooves, and the inner side surface of the turntable is provided with a plurality of driving grooves, and the driving groove is provided with a cam surface, one end of the knife die slider is located in the driving groove and contacts the cam surface, and when the driving member drives the turntable to rotate, it can push the plurality of knife die sliders to move along the cam surface and retract inward; the upper and lower ends of the shrinking knife die are respectively the middle shrinking head and the tail shrinking head.

2. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 1, characterized in that: The sliding bracket is vertically slidably matched with the slide rail support, a lifting cylinder is installed on the machine base, and the output shaft of the lifting cylinder is connected to the lower mounting plate of the sliding bracket.

3. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 1 or 2, characterized in that: The lower mounting plate of the sliding bracket is connected to a support block, a channel is coaxially opened on the support block, the output shaft of the lifting electric cylinder is located in the channel and can slide vertically along the channel, a clamping cylinder is installed on the support block, the clamping cylinder has a clamping claw, and the clamping claw can clamp the ceramic chip of the product.

4. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 1, characterized in that: A detection sensor is installed on the upper mounting plate of the sliding bracket.

5. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 1, characterized in that: An adapter block is connected to the output shaft of the powder pressing electric cylinder, and guide rods are vertically connected to the left and right sides of the adapter block. The upper end of the guide rod passes through the frame and vertically slides with the frame. A pressure sensor is connected to the bottom of the adapter block and located in the center thereof, and the pressure head is installed at the bottom of the pressure sensor.

6. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 5, characterized in that: A height sensor is installed on the pressure head.

7. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 1, characterized in that: The cam surface includes a first curved surface segment and a second curved surface segment, the slope of the first curved surface segment is greater than the slope of the second curved surface segment, and the second curved surface segment smoothly transitions to the inner side surface of the rotating disk.

8. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 7, characterized in that: The outer side of the rotating disk is connected with a connecting arm, the driving member is a shrinking electric cylinder, and the output shaft of the shrinking electric cylinder is hinged to the connecting arm.

9. A short oxygen powder pressing mechanism for a nitrogen oxygen sensor according to claim 7, characterized in that: The first curved surface segment is connected to the second curved surface segment by circular arc transition.

10. A short oxygen powder pressing mechanism for a nitrogen oxide sensor according to claim 1, characterized in that: The top of the shrinking disk is connected with a cover plate, and a through hole is opened in the center of the cover plate.

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