A sensor packaging apparatus

Abstract

The application belongs to the field of sensor packaging, and particularly relates to a sensor packaging device, which comprises a workbench; a rack is fixedly connected to the top of the workbench; a plurality of feeding electric push rods are fixedly connected to the top of the rack; a fixing clamp is installed at the output end of the feeding electric push rod; a glue injection pipe is installed on the side of the fixing clamp; a sleeve is fixedly connected to the workbench at a position corresponding to the fixing clamp; a limiting cylinder is fixedly connected to the bottom of the sleeve; the guiding seat pushes the metal fixing sheet to fix the pin of the temperature sensing element, and then the temperature sensor is packaged through secondary glue injection; the temperature sensing element is fixed through first glue injection, and the packaging of the temperature sensor is completed through second glue injection, so that the temperature sensing element is not lost due to the softening of the wire harness caused by heat, and the eccentricity of the temperature sensing element is reduced.

Description

Technical Field

[0001] This invention relates to the field of sensors, specifically a sensor packaging device. Background Technology

[0002] A temperature sensor is a type of sensor that converts the measured temperature into an electrical signal for output. Temperature sensors are generally classified into two categories based on their method of operation: non-contact and contact.

[0003] In current technology, temperature sensors mainly consist of an outer metal casing and an inner temperature-sensing element. Encapsulating adhesive is filled between the metal casing and the temperature-sensing element. The pins of the temperature-sensing element are soldered with wire harnesses, and these solder joints are also embedded in the metal casing. The temperature sensor encapsulation equipment mainly consists of an electric push rod, a fixing clamp, and an adhesive injection assembly. The fixing clamp is used to hold and fix the wire harness, thereby lifting and placing the temperature-sensing element into the metal casing. Then, the adhesive injection assembly transports encapsulating adhesive through a pump and pipeline, and sprays it into the metal casing from the injection tube. After the encapsulating adhesive cools, the encapsulation of the temperature sensor is completed.

[0004] However, during the encapsulation process, the temperature sensing end of the temperature sensing element is a free end, while the tail end welded to the wire harness is constrained. However, during the injection of high-temperature encapsulating adhesive, the high temperature of the adhesive softens the insulation of the wire harness, causing the temperature sensing element to lose its constraint and easily shift under the pressure of the encapsulating adhesive, resulting in the temperature sensing element becoming eccentric. Therefore, a sensor encapsulation device is proposed to address the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: A sensor packaging device according to this invention includes a workbench; a frame is fixedly connected to the top of the workbench; multiple feeding electric push rods are fixedly connected to the top of the frame; a fixing clamp is installed at the output end of each feeding electric push rod; a glue injection tube is installed on the side of the fixing clamp; a sleeve is fixedly connected to the middle of the workbench at a position corresponding to the fixing clamp; a limit cylinder is fixedly connected to the bottom of the sleeve; fixing electric push rods are fixedly connected to both sides of the workbench; a support frame is fixedly connected to the output end of each fixing electric push rod; multiple sliding rods are fixedly connected to the inner wall of the support frame; the sliding rods slide symmetrically. A pair of crossbars are connected; a return spring is fixed between the crossbars and the side wall of the fixed cavity; a metal fixing plate is fixed to one side of the pair of crossbars that are close to each other; the metal fixing plate is inclined; the bottom end of the metal fixing plate is inserted into the sleeve; a guide seat is fixed to the top side of the worktable at the position corresponding to the crossbar; the bottom of the guide seat is provided with an inclined surface. Based on the above configuration, the pins of the temperature sensing element are fixed by the metal fixing plate, and then encapsulated by secondary glue injection. The first glue injection fixes the temperature sensing element, thereby reducing the possibility of the temperature sensing element losing its fixation due to the softening of the wire harness due to heat, which would lead to the temperature sensing element becoming eccentric.

[0007] Preferably, the limiting cylinder has multiple through slots; a cooling electric actuator is fixedly connected to the bottom of the worktable; a water tank is fixedly connected to the output end of the cooling electric actuator; the water tank is located at the bottom of the limiting cylinder, so as to quickly cool the metal shell and the glue inside, accelerate the solidification speed of the glue at the bottom of the metal shell, and enable it to quickly fix the temperature sensing element, thereby facilitating the removal of the metal fixing piece when the glue in the middle of the metal shell has not solidified, and the through slots on the limiting cylinder allow the coolant to contact the metal shell.

[0008] Preferably, a heating chamber is provided in the middle of the workbench; an electric heating tube is fixedly connected to the inner wall of the heating chamber; the sleeve passes through the heating chamber and is fixedly connected to it; a heat exchange groove is provided at the corresponding position of the sleeve and the heating chamber, so that the temperature of the top of the metal shell of the sensor can be increased by heating, thereby increasing the fluidity of the adhesive, so that the metal fixing piece can be removed from the metal shell.

[0009] Preferably, each of the pair of crossbars is hinged to an impact rod on one side closest to the other; a fixing rod is fixed to the top of the impact rod; a torsion spring is installed at the hinge of the impact rod; the bottom of the impact rod is located on the side of the metal fixing plate; a magnetic column is fixed to the end of the fixing rod away from the impact rod; a magnetic block is fixed to the side wall of the guide seat at the position corresponding to the magnetic column; the magnetic block is located in the middle of the inclined plane, so that the bottom of the impact rod strikes the metal fixing plate and causes it to vibrate, and the vibration of the metal fixing plate breaks the pulled glue threads, thereby reducing the situation of thin glue threads on the end face of the temperature sensor after the temperature sensor is packaged.

[0010] Preferably, a swing rod is hinged to the bottom end of the limiting cylinder; the top end of the swing rod extends into the interior of the limiting cylinder; a swing block is fixed to the bottom end of the swing rod; a vertical plate is fixed to the inner side wall of the bottom of the water tank at the position corresponding to the swing block. This arrangement facilitates the rapid penetration of glue into the bottom of the metal shell, and also facilitates the removal of air bubbles in the glue. Furthermore, during the secondary glue injection, the cooling electric push rod pushes the water tank to continue moving upward, thereby causing the metal shell to shake again, which facilitates the glue to fully fill the gaps and the pits generated after the metal fixing piece is removed.

[0011] Preferably, a silicone membrane is fixedly attached to the side wall of the heat exchange tank; a flexible tube and a drain pipe are fixedly attached to the bottom of the heat exchange tank; a piston cylinder is fixedly attached to the bottom end of the flexible tube; the piston cylinder is fixedly attached to the inner side wall of the bottom of the water tank; a piston rod is slidably connected to the middle of the piston cylinder; an elastic element is fixedly attached between the top end of the piston rod and the piston cylinder, so that the glue after the second injection of adhesive on the sleeve and the metal shell can be cooled and molded quickly by relying on the flowing coolant.

[0012] Preferably, a pair of brackets are fixedly connected to the top side of the workbench; the pair of brackets are symmetrically arranged on both sides of the support frame; a cleaning electric actuator is fixedly connected to the bracket; a plate is fixedly connected to the output end of the cleaning electric actuator; a pair of cleaning rods are provided on the bracket at positions corresponding to the bottom sides of the metal fixing piece; the cleaning rods pass through the bracket and are slidably connected to it; the end of the cleaning rod is fixedly connected to the plate; a friction plate is fixedly connected to the side wall of the cleaning rod, which cleans the adhesive adhering to the metal fixing piece by friction, thereby facilitating the subsequent encapsulation of the metal fixing piece.

[0013] Preferably, a fixing seat is fixedly connected to the side of the cleaning rod near the friction plate; a pair of rods are slidably connected to the fixing seat; a support block is fixedly connected to the end of the rod away from the plate; a support spring is fixedly connected between the fixing seat and the support block, and the metal fixing plate is fixed from both sides by the two support blocks, thereby reducing the bending and deformation of the metal fixing plate during the process of being rubbed and cleaned by the cleaning rod.

[0014] Preferably, a pressure plate is slidably connected to the top of the heating chamber; a pressure spring is fixedly connected to the top side of the pressure plate; the top of the pressure spring is fixedly connected to the top side of the heating chamber; the electric heating tube is located at the bottom of the pressure plate, so that the pressure plate applies a certain pressure to the heat transfer oil, thereby making the silicone film tightly adhere to the heat exchange tank and reducing the amount of residual coolant in the heat exchange tank, so that the heat transfer oil can transfer heat to the metal shell.

[0015] Preferably, a pulley is fixedly connected to the side of the crossbar near the guide seat; a water-proof membrane is fixedly connected to the inner wall of the limiting cylinder; the top of the swing rod passes through the water-proof membrane and is fixedly connected to it; the pipe can be filtered by setting a filter screen; the friction between the crossbar and the guide seat can be reduced by setting a pulley, thereby reducing the wear between the crossbar and the guide seat.

[0016] The advantages of this invention are:

[0017] 1. This invention uses a support frame, a sliding rod, a crossbar, a metal fixing plate, a guide seat, a fixed electric push rod, and a return spring. The fixed electric push rod pulls down to move the support frame, crossbar, and metal fixing plate downwards. The guide seat pushes the metal fixing plate to fix the pins of the temperature sensing element. Then, a second encapsulation process is used. The first encapsulation fixes the temperature sensing element, and the second encapsulation completes the encapsulation of the temperature sensor. This reduces the risk of the temperature sensing element losing its fixation due to the wire harness softening due to heat, which could lead to the temperature sensing element becoming eccentric.

[0018] 2. This invention, by setting up a cooling electric actuator and a water tank, activates the cooling electric actuator during the first glue injection cooling process. The cooling electric actuator drives the water tank upward, and coolant is injected into the water tank, thereby submerging the bottom of the limiting cylinder and the metal shell of the sensor into the coolant. This allows for rapid cooling of the bottom of the metal shell and the internal glue, accelerating the solidification speed of the glue at the bottom of the metal shell, enabling rapid fixation of the temperature sensing element. This facilitates the removal of the metal fixing piece before the glue in the middle of the metal shell solidifies. A through groove is provided on the limiting cylinder to allow the coolant to contact the metal shell. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of the water tank structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the support frame structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the crossbar structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the limiting cylinder structure of the present invention;

[0025] Figure 6 for Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 7 This is a schematic diagram of the sleeve structure of the present invention.

[0027] In the diagram: 11. Workbench; 12. Fixing clamp; 13. Injection tube; 14. Fixing electric actuator; 15. Support frame; 16. Slide rod; 17. Crossbar; 18. Metal fixing plate; 19. Guide seat; 191. Sleeve; 192. Limiting cylinder; 21. Cooling electric actuator; 22. Water tank; 23. Through groove; 31. Heating chamber; 32. Heating element; 41. Impact rod; 42. Fixing rod; 43. Magnetic column; 44. Magnetic block; 51. Swing rod; 52. Vertical plate; 53. Swing block; 61. Piston cylinder; 62. Piston rod; 63. Flexible tube; 64. Silicone membrane; 65. Drain pipe; 71. Support; 72. Cleaning electric actuator; 73. Plate; 74. Cleaning rod; 75. Friction plate; 81. Fixing seat; 82. Rod body; 83. Support block; 91. Pressure plate; 92. Pressure spring; 101. Pulley; 102. Waterproof membrane. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Specific implementation examples are given below.

[0030] Please see Figure 1-5As shown, a sensor packaging device includes a workbench 11; a frame is fixedly connected to the top of the workbench 11; multiple feeding electric push rods are fixedly connected to the top of the frame; a fixing clamp 12 is installed at the output end of the feeding electric push rod; a glue injection tube 13 is installed on the side of the fixing clamp 12; a sleeve 191 is fixedly connected to the middle of the workbench 11 at a position corresponding to the fixing clamp 12; a limit cylinder 192 is fixedly connected to the bottom of the sleeve 191; fixing electric push rods 14 are fixedly connected to both sides of the workbench 11; a support frame 15 is fixedly connected to the output end of the fixing electric push rod 14; multiple sliding rods 16 are fixedly connected to the inner wall of the support frame 15; a pair of crossbars 17 are symmetrically slidably connected to the sliding rods 16; the crossbars 17 and... A return spring is fixed between the side walls of the fixed cavity; a metal fixing plate 18 is fixed to one side of the pair of crossbars 17 that are close to each other; the metal fixing plate 18 is inclined; the bottom end of the metal fixing plate 18 is inserted into the sleeve 191; a guide seat 19 is fixed to the top side of the worktable 11 at the position corresponding to the crossbar 17; the bottom of the guide seat 19 is provided with an inclined surface; in the prior art, during encapsulation, the wire harness of the temperature sensing element is clamped and fixed by the fixing clamp 12, the feeding electric push rod is initially in a retracted state, and the temperature sensing element is sent into the metal shell of the sensor by extending the feeding electric push rod. Then, glue is injected into the metal shell through the glue injection tube 13, and after waiting for the glue to cool, the encapsulation of the temperature sensor is completed. In the embodiment of the present invention, during encapsulation, the metal housing is inserted into the sleeve 191 and the limiting cylinder 192. After the temperature sensing element is inserted into the metal housing, the fixing electric push rod 14 is activated. The fixing electric push rod 14 is initially in an extended state. The fixing electric push rod 14 will drive the support frame 15 to move downward, and then the slide rod 16 will cause the crossbar 17 and the metal fixing plate 18 to move downward synchronously. Then, under the push of the inclined surface of the guide seat 19, the two crossbars 17 and the metal fixing plate 18 move closer to the central sleeve 191, and the metal fixing plate 18 moves downward. The top of the metal fixing plate 18 is inserted into the sleeve 191, and then the bottom of the metal fixing plate 18 presses and fixes the pin of the temperature sensing element. After that, the dispensing tube 13 dispenses glue in two batches. In the first injection, the glue seeps down from the gap between the metal casing and the wiring harness to the bottom of the metal casing, with the amount of glue covering the temperature sensing element. After the glue solidifies, the fixed electric push rod 14 is reset. Then, under the pull of the reset spring, it will drive the crossbar 17 and the metal fixing plate 18 to reset, thereby removing the metal fixing plate 18 from the metal casing of the sensor. Then, the glue injection tube 13 dispenses glue a second time to complete the sealing of the sensor. Based on the above settings, the pins of the temperature sensing element are fixed by the metal fixing plate 18. After the second glue injection, the temperature sensing element is fixed by the first glue injection, thereby reducing the possibility of the temperature sensing element losing its fixation due to the softening of the wiring harness due to heat, which could lead to the temperature sensing element becoming eccentric.

[0031] Furthermore, such as Figure 1-2As shown, the limiting cylinder 192 has multiple through slots 23; a cooling electric push rod 21 is fixedly connected to the bottom of the worktable 11; a water tank 22 is fixedly connected to the output end of the cooling electric push rod 21; the water tank 22 is located at the bottom of the limiting cylinder 192; during the first glue injection cooling process, the cooling electric push rod 21 is activated. The initial state of the cooling electric push rod 21 is the retracted state. The cooling electric push rod 21 drives the water tank 22 to move upward. Coolant is injected into the water tank 22, so that the bottom of the limiting cylinder 192 and the metal shell of the sensor are submerged in the coolant. This allows for rapid cooling of the bottom metal shell and the glue inside, accelerating the solidification speed of the glue at the bottom of the metal shell, so that the temperature sensing element can be quickly fixed. This makes it easy to remove the metal fixing piece 18 when the glue in the middle of the metal shell is not solidified. The through slots 23 on the limiting cylinder 192 facilitate the contact of the coolant with the metal shell.

[0032] Furthermore, such as Figure 2 As shown, a heating chamber 31 is provided in the middle of the workbench 11; an electric heating tube 32 is fixedly connected to the inner wall of the heating chamber 31; a sleeve 191 passes through the heating chamber 31 and is fixedly connected to it; a heat exchange groove is provided at the corresponding position of the sleeve 191 and the heating chamber 31; in use, the heating chamber 31 is filled with heat-conducting oil, and then the operator can control the electric heating tube 32 to heat the inside of the heating chamber 31. A thermostat is installed on the electric heating tube 32, and a temperature sensor is installed in the heating chamber 31 to control the heating temperature. Heating can increase the temperature of the top of the metal shell of the sensor, thereby increasing the fluidity of the adhesive, so that the metal fixing piece 18 can be removed from the metal shell. At the same time, it can facilitate the filling of gaps and pits caused by the adhesive after secondary glue injection and removal of the metal fixing piece 18. By setting the heat exchange groove, the thickness of the middle part of the sleeve 191 can be reduced to facilitate the heat transfer to the metal shell.

[0033] Furthermore, such as Figure 3 and 4As shown, each of the pair of crossbars 17 is hinged to an impact rod 41 on one side close to the other; a fixing rod 42 is fixed to the top of the impact rod 41; a torsion spring is installed at the hinge of the impact rod 41; the bottom of the impact rod 41 is located on the side of the metal fixing plate 18; a magnetic column 43 is fixed to the end of the fixing rod 42 away from the impact rod 41; a magnetic block 44 is fixed to the side wall of the guide seat 19 at the position corresponding to the magnetic column 43; the magnetic block 44 is located in the middle of the inclined plane; the fixing rod 42 is a U-shaped rod; during the resetting process of the metal fixing plate 18, due to the metal fixing plate 18... When adhesive is applied to the metal fixing plate 18 and it is pulled upwards, the adhesive will form strings. In this embodiment of the invention, the crossbar 17 and the metal fixing plate 18 will return to their original positions when in use. During the movement, after the magnetic column 43 and the magnetic block 44 are aligned, the magnetic block 44 attracts the magnetic column 43, which in turn causes the fixing rod 42 to drive the impact rod 41 to rotate. The bottom of the impact rod 41 strikes the metal fixing plate 18 to make it vibrate. The vibration of the metal fixing plate 18 breaks the pulled-out adhesive strings, thereby reducing the presence of long and thin adhesive strings on the end face of the temperature sensor after it is packaged.

[0034] Furthermore, such as Figure 2 As shown, a swing rod 51 is hinged to the bottom end of the limiting cylinder 192; the top end of the swing rod 51 extends into the interior of the limiting cylinder 192; a swing block 53 is fixedly connected to the bottom end of the swing rod 51; a vertical plate 52 is fixedly connected to the inner side wall of the bottom of the water tank 22 at a position corresponding to the swing block 53; the side of the vertical plate 52 near the swing block 53 has a wave-shaped structure design; during the upward movement of the water tank 22, the water tank 22 will drive the vertical plate 52 to move upward and contact the swing block 53. Under the push of the vertical plate 52, the swing block 53 and the swing rod 51 are rotated, and then the swing rod 51 returns to its original position under the weight of the swing block 53. Then, through the wave-shaped structure design of the vertical plate 52, the swing rod 51 swings multiple times, causing the sensor metal shell at the top of the swing rod 51 to slide. When the water tank 22 moves upward, the first glue is injected. At this time, the metal fixing plate 18 and the fixing clamp 12 fix the temperature sensing element. The shaking of the metal shell will not affect the temperature sensing element. This setting facilitates the glue to quickly penetrate into the bottom of the metal shell and also facilitates the removal of air bubbles in the glue. During the second glue injection, the cooling electric push rod 21 pushes the water tank 22 to continue moving upward, thereby causing the metal shell to shake again, which facilitates the glue to fully fill the gaps and the pits caused after the metal fixing plate 18 is removed.

[0035] Furthermore, such as Figure 2 and 7As shown, a silicone membrane 64 is fixedly attached to the side wall of the heat exchange tank; a flexible tube 63 and a drain pipe 65 are fixedly attached to the bottom of the heat exchange tank; a piston cylinder 61 is fixedly attached to the bottom end of the flexible tube 63; the piston cylinder 61 is fixedly attached to the inner side wall of the bottom of the water tank 22; a piston rod 62 is slidably connected to the middle of the piston cylinder 61; an elastic element is fixedly attached between the top end of the piston rod 62 and the piston cylinder 61; during the second injection process, the top end of the piston rod 62 contacts the worktable 11, and then the water tank 22 moves upward again, the worktable 11 squeezes the piston rod 62, and the coolant in the piston cylinder 61 flows out from the flexible tube 63. The coolant is injected into the gap between the heat exchange tank and the silicone membrane 64 through the tube 63, causing the silicone membrane 64 to expand. The space filled with coolant separates the heat transfer oil, and then the coolant is discharged outward from the drain pipe 65. As the piston rod 62 moves upward continuously, the coolant is continuously pumped into the heat exchange tank. The flowing coolant facilitates the rapid cooling and molding of the adhesive after the second injection of glue into the sleeve 191 and the metal shell. When the water tank 22 is reset, the piston rod 62 is pushed to reset by the elastic element. Then the drain pipe 65 draws coolant from the water tank 22 and enters the piston cylinder 61, filling the piston cylinder 61.

[0036] Furthermore, such as Figure 1 and 6 As shown, a pair of brackets 71 are fixedly connected to the top side of the workbench 11; the pair of brackets 71 are symmetrically arranged on both sides of the support frame 15; a cleaning electric actuator 72 is fixedly connected to the bracket 71; a plate 73 is fixedly connected to the output end of the cleaning electric actuator 72; a pair of cleaning rods 74 are provided on the bracket 71 at positions corresponding to the bottom sides of the metal fixing plate 18; the cleaning rods 74 pass through the bracket 71 and are slidably connected to it; the end of the cleaning rod 74 is fixedly connected to the plate 73; a friction rod is fixedly connected to the side wall of the cleaning rod 74. The cleaning pads 75 and the pair of cleaning rods 74 are symmetrically arranged. After the metal fixing plate 18 is reset, the cleaning electric push rod 72 is activated. The cleaning electric push rod 72 pulls the plate 73 to move. The cleaning electric push rod 72 is initially in the extended state. Then, the multiple cleaning rods 74 on both sides are brought closer to each other. Then, the friction pads 75 on the two cleaning rods 74 come into contact with the metal fixing plate 18 from the bottom sides. The adhesive on the metal fixing plate 18 is cleaned by friction, which makes it easier to encapsulate the metal fixing plate 18 later.

[0037] Furthermore, such as Figure 6As shown, a fixing seat 81 is fixedly connected to the side of the cleaning rod 74 near the friction plate 75; a pair of rods 82 are slidably connected to the fixing seat 81; a support block 83 is fixedly connected to the end of the rod 82 away from the plate 73; a support spring is fixedly connected between the fixing seat 81 and the support block 83; during use, when the two cleaning rods 74 clean the metal fixing plate 18, the support block 83 contacts the side of the metal fixing plate 18, and the two support blocks 83 fix the metal fixing plate 18 from both sides, thereby reducing the bending and deformation of the metal fixing plate 18 during the friction cleaning process of the cleaning rods 74. The rod 82 passes through the fixing seat 81 and is supported by the support spring to maintain the contact between the support block 83 and the metal fixing plate 18.

[0038] Furthermore, such as Figure 2 As shown, a pressure plate 91 is slidably connected to the top of the heating chamber 31; a pressure spring 92 is fixedly connected to the top side of the pressure plate 91; the top end of the pressure spring 92 is fixedly connected to the top side of the heating chamber 31; the electric heating tube 32 is located at the bottom of the pressure plate 91; in use, the pressure spring 92 pushes the pressure plate 91 downward, thereby applying a certain pressure to the heat transfer oil, so that the silicone film 64 is tightly attached to the heat exchange tank, and the residual coolant in the heat exchange tank is reduced, so that the heat transfer oil can transfer heat to the metal shell. When injecting coolant into the heat exchange tank, the pressure of the piston rod 62 is greater than the pressure applied to the heat transfer oil by the pressure plate 91.

[0039] Furthermore, such as Figure 2-4 As shown, a pulley 101 is fixedly connected to the side of the crossbar 17 near the guide seat 19; a water-proof membrane 102 is fixedly connected to the inner wall of the limiting cylinder 192; the top end of the swing rod 51 passes through the water-proof membrane 102 and is fixedly connected to it; when the sensor metal shell is inserted into the limiting cylinder 192, its water-proof membrane 102 will cover the sensor metal shell, thereby separating the coolant in the water tank 22 from the sensor metal shell, thus reducing the situation where the sensor metal shell gets wet; the filter screen can filter the tube by setting up the filter screen; the pulley 101 can reduce the friction between the crossbar 17 and the guide seat 19, and reduce the wear between the crossbar 17 and the guide seat 19.

[0040] Working principle: In the existing technology, during the encapsulation process, the wire harness of the temperature sensing element is clamped and fixed by the fixing clamp 12. The feeding electric push rod is initially in a retracted state. The temperature sensing element is sent into the metal shell of the sensor by extending the feeding electric push rod. Then, glue is injected into the metal shell through the glue injection tube 13. After waiting for the glue to cool, the encapsulation of the temperature sensor is completed.

[0041] In the encapsulation process of this invention, the metal shell is inserted into the sleeve 191 and the limiting cylinder 192. After the temperature sensing element is inserted into the metal shell, the fixing electric push rod 14 is activated. The fixing electric push rod 14 is initially in an extended state. The fixing electric push rod 14 will drive the support frame 15 to move downward, and then the slide rod 16 will cause the crossbar 17 and the metal fixing plate 18 to move downward synchronously. Then, under the push of the inclined surface of the guide seat 19, the two crossbars 17 and the metal fixing plate 18 move closer to the central sleeve 191, and the metal fixing plate 18 moves downward. The top of the metal fixing plate 18 is inserted into the sleeve 191, and then the bottom of the metal fixing plate 18 presses and fixes the pin of the temperature sensing element. After that, the glue injection tube 13 injects glue in two stages. First, the glue seeps down into the bottom of the metal casing from the gap between the metal casing and the wire harness, with the amount of glue covering the temperature sensing element. After the glue solidifies, the fixed electric push rod 14 is reset. Then, under the pull of the reset spring, it will drive the crossbar 17 and the metal fixing plate 18 to reset, thereby removing the metal fixing plate 18 from the metal casing of the sensor. Then, the glue injection tube 13 dispenses glue a second time to complete the sealing of the sensor. Based on the above settings, the pins of the temperature sensing element are fixed by the metal fixing plate 18. Then, through secondary glue injection and encapsulation, the temperature sensing element is fixed by the first glue injection, thereby reducing the possibility of the temperature sensing element losing its fixation due to the wire harness softening due to heat, which could lead to the temperature sensing element becoming eccentric.

[0042] During the first injection and cooling process, the cooling electric actuator 21 is activated. Initially in a retracted state, the actuator moves the water tank 22 upwards. Coolant is injected into the water tank 22, submerging the bottom of the limiting cylinder 192 and the sensor's metal casing. This rapidly cools the bottom of the metal casing and the internal adhesive, accelerating the curing of the adhesive at the bottom of the metal casing. This allows for quick fixation of the temperature-sensing element, facilitating the removal of the metal fixing piece 18 before the adhesive in the middle of the metal casing has solidified. A through groove 23 is provided on the limiting cylinder 192 to facilitate the collection of coolant. The heating chamber 31 is filled with heat-conducting oil and the heating tube 32 is installed on the metal outer shell. The heating tube 32 is equipped with a thermostat and the heating chamber 31 is equipped with a temperature sensor to control the heating temperature. Heating can increase the temperature of the top of the metal outer shell of the sensor, thereby increasing the fluidity of the adhesive so that the metal fixing piece 18 can be removed from the metal outer shell. At the same time, it can facilitate the filling of gaps and pits caused by the adhesive after the second glue injection and the removal of the metal fixing piece 18. By setting the heat exchange groove, the thickness of the middle part of the sleeve 191 can be reduced so that heat can be transferred to the metal outer shell.

[0043] During the resetting process of the metal fixing plate 18, since there is glue adhering to the metal fixing plate 18, when the metal fixing plate 18 is pulled upward, the glue will be drawn into threads. When the present invention is used, the crossbar 17 and the metal fixing plate 18 will be reset upward. During the movement, after the magnetic column 43 and the magnetic block 44 are aligned, the magnetic block 44 attracts the magnetic column 43, which in turn causes the fixing rod 42 to drive the impact rod 41 to rotate. The bottom of the impact rod 41 strikes the metal fixing plate 18 to make it vibrate. The vibration of the metal fixing plate 18 breaks the glue threads that are pulled out, thereby reducing the situation that there are thin glue threads on the end face of the temperature sensor after the temperature sensor is packaged.

[0044] As the water tank 22 moves upward, it drives the vertical plate 52 to move upward and come into contact with the swing block 53. The vertical plate 52 pushes the swing block 53 and the swing rod 51 to rotate. Then, under the weight of the swing block 53, the swing rod 51 returns to its original position. Through the wave-shaped structure design of the vertical plate 52, the swing rod 51 swings multiple times, causing the sensor's metal casing at the top of the swing rod 51 to slide. During the upward movement of the water tank 22, the first gluing is applied, at which point the metal fixing piece 1... 8 and the fixing clamp 12 fix the temperature sensing element. The shaking of the metal shell will not affect the temperature sensing element. This setting facilitates the glue to quickly penetrate to the bottom of the metal shell and also facilitates the removal of air bubbles in the glue. During the second glue injection, the cooling electric push rod 21 pushes the water tank 22 to continue moving upward, thereby causing the metal shell to shake again, which facilitates the glue to fully fill the gaps and the pits caused by the removal of the metal fixing piece 18. During the second glue injection, the top of the piston rod 62 contacts the worktable 11, and then the water tank 22 again... As the piston rod 62 moves upward, the worktable 11 presses against the piston cylinder 61, injecting the coolant from the piston cylinder 61 through the flexible tube 63 into the gap between the heat exchange tank and the silicone membrane 64. This causes the silicone membrane 64 to expand, and the space filled with coolant separates the heat transfer oil. The coolant then drains out through the drain pipe 65. As the piston rod 62 continues to move upward, the coolant in the heat exchange tank is continuously pumped out. The flowing coolant facilitates the rapid cooling and molding of the adhesive after the second injection of glue onto the sleeve 191 and the metal casing. When the water tank 22 is reset, the elasticity... The piston rod 62 is pushed to reset, and then the drain pipe 65 draws coolant from the water tank 22 and enters the piston cylinder 61, filling the piston cylinder 61. The pressure spring 92 pushes the pressure plate 91 downward, thereby applying a certain pressure to the heat transfer oil, so that the silicone film 64 is tightly attached to the heat exchange tank and the residual coolant in the heat exchange tank is reduced, so that the heat transfer oil can transfer heat to the metal shell. When injecting coolant into the heat exchange tank, the pressure of the piston rod 62 is greater than the pressure applied to the heat transfer oil by the pressure plate 91.

[0045] After the metal fixing plate 18 is reset, the cleaning electric push rod 72 is activated. The cleaning electric push rod 72 pulls the plate 73 to move. The cleaning electric push rod 72 is initially in the extended state. Then, the multiple cleaning rods 74 on both sides are brought closer to each other. Then, the friction plates 75 on the two cleaning rods 74 contact the metal fixing plate 18 from the bottom sides. The adhesive on the metal fixing plate 18 is cleaned by friction, which facilitates the subsequent encapsulation of the metal fixing plate 18. During the cleaning process of the two cleaning rods 74, the support block 83 contacts the side of the metal fixing plate 18. The two support blocks 83 fix the metal fixing plate 18 from both sides, which can reduce the bending and deformation of the metal fixing plate 18 during the friction cleaning process of the cleaning rods 74. The rod 82 passes through the fixing seat 81 and is supported by the support spring to maintain the contact between the support block 83 and the metal fixing plate 18.

[0046] When the sensor metal housing is inserted into the limiting cylinder 192, its water-proof membrane 102 will cover the sensor metal housing, thereby separating the coolant in the water tank 22 from the sensor metal housing, thus reducing the possibility of the sensor metal housing getting wet. The filter screen can filter the pipe, and the pulley 101 can reduce the friction between the crossbar 17 and the guide seat 19, thus reducing the wear between the crossbar 17 and the guide seat 19.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A sensor packaging device, comprising a workbench (11); a rack is fixed on the top of the workbench (11); a plurality of feeding electric push rods are fixed on the top of the rack; a fixing clamp (12) is installed on the output end of the feeding electric push rod; a glue injection pipe (13) is installed on the side of the fixing clamp (12); characterized in that: A sleeve (191) is fixedly connected to the middle of the worktable (11) at the position corresponding to the fixed clamp (12); a limit cylinder (192) is fixedly connected to the bottom of the sleeve (191); fixed electric actuators (14) are fixedly connected to both sides of the worktable (11); a support frame (15) is fixedly connected to the output end of the fixed electric actuator (14); a plurality of sliding rods (16) are fixedly connected to the inner side wall of the support frame (15); a pair of sliding rods (16) are symmetrically connected to each other. A crossbar (17); a return spring is fixed between the crossbar (17) and the side wall of the fixed cavity; a metal fixing plate (18) is fixed to one side of the pair of crossbars (17) that are close to each other; the metal fixing plate (18) is inclined; the bottom end of the metal fixing plate (18) is inserted into the sleeve (191); a guide seat (19) is fixed to the top side of the worktable (11) at the position corresponding to the crossbar (17); the bottom of the guide seat (19) is provided with an inclined surface; A pair of crossbars (17) are hinged to each other on one side; a fixing rod (42) is fixed to the top of the impact rod (41); a torsion spring is installed at the hinge of the impact rod (41); the bottom of the impact rod (41) is located on the side of the metal fixing plate (18); a magnetic column (43) is fixed to the end of the fixing rod (42) away from the impact rod (41); a magnetic block (44) is fixed to the side wall of the guide seat (19) at the position corresponding to the magnetic column (43); the magnetic block (44) is located in the middle of the inclined plane.

2. The sensor packaging device according to claim 1, characterized in that: The limiting cylinder (192) has multiple through slots (23); a cooling electric push rod (21) is fixedly connected to the bottom of the worktable (11); a water tank (22) is fixedly connected to the output end of the cooling electric push rod (21); the water tank (22) is located at the bottom of the limiting cylinder (192).

3. The sensor packaging device according to claim 2, characterized in that: A heating chamber (31) is provided in the middle of the workbench (11); an electric heating tube (32) is fixedly connected to the inner wall of the heating chamber (31); a sleeve (191) passes through the heating chamber (31) and is fixedly connected to it; a heat exchange groove is provided at the corresponding position of the sleeve (191) and the heating chamber (31).

4. The sensor packaging device according to claim 3, characterized in that: The bottom end of the limiting cylinder (192) is hinged with a swing rod (51); the top end of the swing rod (51) extends into the interior of the limiting cylinder (192); the bottom end of the swing rod (51) is fixed with a swing block (53); a vertical plate (52) is fixed at the position corresponding to the swing block (53) on the bottom inner wall of the water tank (22).

5. A sensor packaging device according to claim 3, characterized in that: A silicone membrane (64) is fixedly attached to the side wall of the heat exchange tank; a flexible tube (63) and a drain pipe (65) are fixedly attached to the bottom of the heat exchange tank; a piston cylinder (61) is fixedly attached to the bottom end of the flexible tube (63); the piston cylinder (61) is fixedly attached to the bottom inner side wall of the water tank (22); a piston rod (62) is slidably connected to the middle of the piston cylinder (61); an elastic element is fixedly attached between the top end of the piston rod (62) and the piston cylinder (61).

6. A sensor packaging device according to claim 3, characterized in that: A pair of brackets (71) are fixed to the top side of the workbench (11); the pair of brackets (71) are symmetrically arranged on both sides of the support frame (15); a cleaning electric push rod (72) is fixed to the bracket (71); a plate (73) is fixed to the output end of the cleaning electric push rod (72); a pair of cleaning rods (74) are provided on the bracket (71) at positions corresponding to the bottom sides of the metal fixing plate (18); the cleaning rods (74) pass through the bracket (71) and are slidably connected to it; the end of the cleaning rod (74) is fixed to the plate (73); a friction plate (75) is fixed to the side wall of the cleaning rod (74).

7. A sensor packaging device according to claim 6, characterized in that: A fixing seat (81) is fixedly connected to the side of the cleaning rod (74) near the friction plate (75); a pair of rods (82) are slidably connected to the fixing seat (81); a support block (83) is fixedly connected to the end of the rod (82) away from the plate (73); a support spring is fixedly connected between the fixing seat (81) and the support block (83).

8. A sensor packaging device according to claim 5, characterized in that: A pressure plate (91) is slidably connected to the top of the heating chamber (31); a pressure spring (92) is fixedly connected to the top side of the pressure plate (91); the top end of the pressure spring (92) is fixedly connected to the top side of the heating chamber (31); the electric heating tube (32) is located at the bottom of the pressure plate (91).

9. A sensor packaging device according to claim 4, characterized in that: A pulley (101) is fixedly connected to the side of the crossbar (17) near the guide seat (19); a water-proof membrane (102) is fixedly connected to the inner wall of the limiting cylinder (192); the top of the swing rod (51) passes through the water-proof membrane (102) and is fixedly connected to it.

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