Automated freeze press assembly line

Abstract

The present application relates to the technical field of bearing assembly, particularly relates to an automatic refrigeration press-fit production line, comprising a press-fit platform, the top of the press-fit platform is provided with a combined press-fit mechanism. The bearing seat hole of the present application is fed by a rotary feeding machine, then is transferred to the combined press-fit mechanism by a feeding tool No.2 for limiting, the sliding bearings are transferred to the bearing seat hole one by one by a liquid nitrogen conveying chain, reach the specified position after being frozen and shrunk, then are transferred to the bearing seat hole by a feeding tool No.1, and the press-fit work is carried out by the combined press-fit mechanism, then the press-fitted guide assembly is classified and discharged by a discharging and distributing tool. The sliding bearings are not only frozen by liquid nitrogen, but also are installed after being shrunk, the outer surface of the sliding bearings is in full contact with the seat hole after the installation is completed and the sliding bearings gradually return to normal temperature, so that interference fit is realized, the deformation of the bearing during pressure installation is effectively reduced, the scrap rate during installation of the sliding bearing is reduced, and the efficiency and quality of the press-fit work are improved.

Description

Technical Field

[0001] This invention belongs to the field of bearing assembly technology, and specifically relates to an automatic frozen pressing production line. Background Technology

[0002] The production standard for guide assembly is to assemble a sliding bearing with an open slot into the housing of another bearing. This ensures that the sliding bearing does not rotate in the housing and that the outer surface of the sliding bearing makes full contact with the housing to facilitate load bearing and achieve precise guidance.

[0003] A search revealed that Chinese Patent Publication No. CN110285148B, published on October 24, 2023, discloses an automated bearing production line. This line facilitates the automatic assembly and cleaning of bearings, reducing labor intensity, ensuring cleaning effectiveness, and improving efficiency. It includes a ball loading mechanism, a cleaning mechanism, and a bushing pressing mechanism arranged sequentially. The ball loading mechanism completes the assembly of all steel balls in a single operation, quickly achieving automatic ball loading and improving overall assembly efficiency. During cleaning, the outer ring, upper inner ring, and lower inner ring of the bearing are separated, and then the upper inner ring, lower inner ring, and outer ring are rinsed separately by a flushing structure. This separate flushing method allows for a more thorough cleaning of all bearing components, ensuring effective cleaning. Finally, during bushing pressing, the bearing and bushing are automatically fed separately, and the pressing operation is completed at the bushing pressing mechanism. After inspection by the bushing detection mechanism, the bearing is unloaded from the unloading mechanism. A conveying mechanism facilitates the transport of the bearing between different mechanisms, improving assembly efficiency.

[0004] However, the device still has the following drawbacks:

[0005] Existing bearing press-fitting devices typically force sliding bearings into bearing housing holes using pressure. However, when sliding bearings are subjected to excessive pressure, they are prone to deformation, which increases the scrap rate of the press-fitting process. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an automated cryogenic pressing production line, comprising a pressing platform, a liquid nitrogen conveyor chain on one side wall of the pressing platform, a rotary feeder on the side wall of the pressing platform perpendicular to the liquid nitrogen conveyor chain, positioning feeder 1 and positioning feeder 2 respectively located on the two perpendicular sides of the top of the pressing platform, the input ends of positioning feeder 1 and positioning feeder 2 respectively connected to the output ends of the liquid nitrogen conveyor chain and the rotary feeder, the top of the pressing platform being equipped with a combined pressing mechanism, and a discharge diversion fixture at the output end of the combined pressing mechanism.

[0007] The combined pressing mechanism includes a second mounting frame and a drive base; the top of the second mounting frame is provided with a first pressing cylinder and a second pressing cylinder; the output end of the first pressing cylinder extends to the bottom of the second mounting frame and is connected to a first pressure component; the output end of the second pressing cylinder extends to the bottom of the second mounting frame and is connected to a second pressure component; three sets of limit clamping assemblies are connected in parallel to the conveying end of the drive base; pressure sensors are provided inside both the first and second pressure components.

[0008] Furthermore, the liquid nitrogen conveying chain includes a housing; a hinged flap is attached to the top of the housing; two sets of telescopic support rods are symmetrically arranged on the two side walls of the flap; sealing cotton is provided on the top of the housing; two sets of conveying chains are provided inside the housing; each set of conveying chains consists of several sets of chain plates connected one end to the other in sequence; several sets of leakage holes are evenly distributed on the top of each set of chain plates; two sets of support plates are symmetrically arranged on both sides of each set of conveying chains; two sets of guide plates are symmetrically arranged on the top of each set of conveying chains; and two sets of protective boxes are symmetrically arranged at both ends of the four sets of support plates.

[0009] Furthermore, two sets of baffles are symmetrically arranged below both ends of the sealing cotton; three sets of sealing plates are arranged parallel to each other inside the box; two sets of pull rods are symmetrically arranged at both ends of the three sets of sealing plates; two sets of adjustment slots are symmetrically opened at both ends of each set of support plates; each set of pull rods moves through the corresponding four sets of adjustment slots; several sets of air guide holes are equally spaced on each set of support plates; several sets of air guide holes are equally spaced on each set of sealing plates; each set of air guide holes is movably connected to the corresponding air guide hole; an air inlet pipe and an exhaust pipe are respectively provided on the two side walls of the box.

[0010] Furthermore, the chamber is equipped with a freeze dryer and an exhaust fan; the input end of the freeze dryer is connected to the air inlet pipe, and the output end is connected to several sets of corresponding air guide holes; the cold source of the freeze dryer is liquid nitrogen; the input end of the exhaust fan is connected to several sets of corresponding air guide holes, and the output end is connected to the exhaust pipe; a liquid nitrogen inlet and outlet are provided on one side wall at the bottom of the chamber; the positioning and feeding fixture includes two sets of linear guide rails 1 and 2 that are staggered; clamp assembly 1 and clamp assembly 2 are respectively connected to the output ends of linear guide rail 1 and linear guide rail 2; two sets of internal support seats are provided parallel between linear guide rail 1 and linear guide rail 2.

[0011] Furthermore, the clamp assembly includes an insulated bucket; an electric push rod is provided at the top of the insulated bucket; a heat insulation ring is provided inside the insulated bucket; a vacuum heat insulation cavity is provided between the outer wall of the heat insulation ring and the inner wall of the insulated bucket; a heat insulation ring is provided at the bottom of the heat insulation ring and the insulated bucket; the output end of the electric push rod extends into the insulated bucket and is connected to a mounting cover; a rotating ring is provided on the inner wall of the mounting cover.

[0012] Furthermore, a mounting bracket is connected to the inner wall of the rotating ring; a movable block is slidably connected to the top inner wall of the mounting bracket; a drive screw is provided inside the mounting bracket; the drive screw is threadedly connected to the movable block; an air guide column is provided at the bottom of the movable block; several sets of telescopic grooves are arranged in a ring array on the bottom inner wall of the air guide column; the side view cross-section of each set of telescopic grooves is fan-shaped; a set of telescopic columns is movably inserted through each set of telescopic grooves; a set of heat-insulating contact blocks are provided at the end of each set of telescopic columns away from the air guide column.

[0013] Furthermore, the limiting clamping assembly includes a clamp; two sets of clamping blocks are symmetrically connected to the output end of the clamp; two sets of telescopic grooves are symmetrically opened on the top of the two sets of clamping blocks; a set of protective plates is movably passed through the top of each set of telescopic grooves; the top view of each set of protective plates is a fan-shaped cross section; a set of protective plates is movably passed through both ends of each set of protective plates; a set of slots is opened at the bottom of the end of each set of protective plates away from the protective plate.

[0014] Furthermore, each set of protective plates is provided with several sets of springs for ejecting the corresponding protective plates; each set of telescopic grooves is provided with a set of electromagnets on the bottom inner wall; each set of electromagnets is magnetically connected to the corresponding set of protective plates; and each set of telescopic grooves is provided with several sets of gas springs.

[0015] Furthermore, the top of each set of gas springs is connected to the bottom of a corresponding set of protective plates; a set of locking blocks are slidably connected to the inner walls on both sides of each set of telescopic grooves; each set of locking blocks is movably inserted into a corresponding set of locking grooves; a set of gas springs is provided on the top of each set of locking blocks; the top of each set of gas springs is connected to the bottom of a corresponding set of protective plates.

[0016] Furthermore, the material feeding and diversion fixture includes a linear conveyor belt; a storage bin and a product diversion trough are provided on one side of the linear conveyor belt; a material feeding cylinder is provided on the side of the linear conveyor belt away from the storage bin; a pusher plate is driven to the output end of the material feeding cylinder; two sets of material feeding cylinders are provided in parallel on the side of the linear conveyor belt away from the product diversion trough; a pusher plate is driven to the output end of each set of material feeding cylinders; each set of pusher plates faces a corresponding set of openings in the product diversion trough.

[0017] The beneficial effects of this invention are:

[0018] 1. The bearing housing bore is fed by a rotary feeder, and then transferred to the combined pressing mechanism for positioning via the second feeding fixture. During this process, two photoelectric sensors are used to position the appearance of the bearing housing bore. The sliding bearings are transported one by one via a liquid nitrogen conveyor chain, and after being frozen and shrunk, they reach the designated position. Then, they are transferred to the bearing housing bore via the first feeding fixture, and the combined pressing mechanism performs the pressing work. After pressing, the guide assembly is sorted and unloaded by the unloading and diversion fixture. This process not only freezes the sliding bearings with liquid nitrogen to ensure that the bearings are shrunk before installation, but also allows the outer surface of the sliding bearings to fully contact the bearing housing bore after installation, achieving an interference fit. This effectively reduces the deformation of the bearings during pressure installation, lowers the scrap rate of the sliding bearings during installation, improves the efficiency and quality of the pressing work, and enables the sorting and collection of materials based on different pressing forces.

[0019] 2. By pulling the lever, several sets of air guide holes 2 on the three sets of sealing plates are connected to the corresponding air guide holes 1. Then, the freeze dryer and exhaust fan are started. The cold source of the freeze dryer can be liquid nitrogen, which continuously supplies dry cold air to the freeze transport area. When the air humidity in the freeze transport area drops to the corresponding standard, the freeze dryer and exhaust fan are turned off. Then, the lever is pulled in the opposite direction to seal the freeze transport area. By drying and pre-cooling the freeze transport area in advance, not only can water vapor be effectively prevented from condensing on the surface of the sliding bearing, but the risk of damage to the conveyor chain and other related structures due to thermal stress when liquid nitrogen is sprayed in the freeze transport area is also reduced.

[0020] 3. By controlling the electric push rod to move the air guide column into the sliding bearing through the mounting cover and movable block, gas is then injected into the air guide column, causing several sets of telescopic columns to extend. Several sets of annularly arranged heat-insulating contact blocks apply uniform pressure to the inner wall of the sliding bearing. This allows the sliding bearing to enter the insulation barrel when the electric push rod drives the air guide column to reset. The insulation barrel is equipped with a vacuum insulation chamber and a heat insulation ring one inside, and a heat insulation ring two at the bottom. This not only avoids the problem of increased brittleness of the sliding bearing after freezing and shrinkage, which is prone to cracking by the existing external clamping method, but also avoids the problem of the sliding bearing expanding too quickly after leaving the freezing conveyor chain, which would affect the subsequent pressing work.

[0021] 4. The bearing seat hole is fixed in the limit clamping assembly. When the sliding bearing is misaligned during pressing, the corresponding alarm will sound and the combined pressing mechanism will be de-energized. At this time, the electromagnet will be de-energized and demagnetized. The two sets of protective plates will pop out of the telescopic grooves under the action of the corresponding gas springs. When the locking blocks on both sides slide up and hit the top of the slide groove, they will disengage from the corresponding locking grooves, so that the protective plates on both sides of each set of protective plates will pop out quickly, protecting the pressing area and preventing the sliding bearing from becoming brittle after freezing and shrinking, which can easily cause it to crack and break off when the pressure is misaligned. This improves the safety of the pressing operation.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0023] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the press-fitting production line according to an embodiment of the present invention is shown;

[0025] Figure 2 A schematic diagram of the liquid nitrogen delivery chain according to an embodiment of the present invention is shown;

[0026] Figure 3 A cross-sectional schematic diagram of a liquid nitrogen delivery chain according to an embodiment of the present invention is shown;

[0027] Figure 4 A schematic diagram of the positioning and feeding fixture according to an embodiment of the present invention is shown;

[0028] Figure 5 A cross-sectional schematic diagram of a clamp assembly according to an embodiment of the present invention is shown;

[0029] Figure 6 A schematic diagram of the combined pressing mechanism according to an embodiment of the present invention is shown;

[0030] Figure 7 A partial cross-sectional schematic diagram of a limiting clamping assembly according to an embodiment of the present invention is shown;

[0031] Figure 8 An embodiment of the present invention is shown. Figure 7An enlarged view of point A;

[0032] Figure 9 A schematic diagram of the unloading and diversion tooling according to an embodiment of the present invention is shown.

[0033] In the diagram: 1. Pressing platform; 2. Liquid nitrogen conveyor chain; 3. Rotary feeder; 4. Positioning feeder fixture one; 5. Positioning feeder fixture two; 6. Combined pressing mechanism; 7. Unloading and diversion fixture; 201. Box body; 202. Flip cover; 203. Telescopic support rod; 204. Sealing cotton; 205. Conveyor chain; 206. Support plate; 207. Guide plate; 208. Protective box; 209. Baffle curtain; 210. Exhaust pipe; 211. Sealing plate; 212. Pull rod; 213. Adjustment valve 214. Vent 1; 215. Vent 2; 216. Freeze dryer; 217. Exhaust fan; 218. Inlet pipe; 219. Liquid nitrogen inlet / outlet; 401. Linear guide rail 1; 402. Linear guide rail 2; 403. Clamp assembly 1; 404. Clamp assembly 2; 405. Inner support; 40301. Insulated container; 40302. Electric push rod; 40303. Heat insulation ring 1; 40304. Vacuum insulation chamber; 40305. Heat insulation ring 2; 40306. Safety device 40307. Cover; Rotating ring; 40308. Mounting bracket one; 40309. Movable block; 40310. Drive screw; 40311. Air guide column; 40312. Telescopic groove one; 40313. Telescopic column; 40314. Heat insulation contact block; 601. Mounting bracket two; 602. Drive seat; 603. Press-fit cylinder one; 604. Press-fit cylinder two; 605. Pressure component one; 606. Pressure component two; 607. Limiting clamping assembly; 60701. Clamp; 60 702. Clamping block; 60703. Telescopic groove II; 60704. Protective plate I; 60705. Protective plate II; 60706. Slot; 60707. Spring; 60708. Electromagnet; 60709. Gas spring I; 60710. Clamping block; 60711. Gas spring II; 701. Linear conveyor belt; 702. Storage bin; 703. Product diversion trough; 704. Feeding cylinder I; 705. Pushing plate I; 706. Feeding cylinder II; 707. Pushing plate II. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0035] This invention provides an automated frozen filling production line, including a filling platform 1, exemplarily, such as... Figure 1 As shown, a liquid nitrogen conveying chain 2 is provided on one side wall of the pressing platform 1; a rotary feeder 3 is provided on one side wall of the pressing platform 1 perpendicular to the liquid nitrogen conveying chain 2; positioning feeder 1 4 and positioning feeder 2 5 are respectively provided on the two perpendicular sides of the top of the pressing platform 1; the input ends of positioning feeder 1 4 and positioning feeder 2 5 are respectively connected to the output ends of the liquid nitrogen conveying chain 2 and the rotary feeder 3; a combined pressing mechanism 6 is provided on the top of the pressing platform 1; a discharge diversion tool 7 is provided at the output end of the combined pressing mechanism 6.

[0036] During the interference fit (press-fit) process between the sliding bearing and the bearing housing bore, the bearing housing bore is fed by a rotary feeder 3, and then transferred to the combined press-fit mechanism 6 for positioning via a second positioning feeder 5. Two photoelectric sensors are used to position the bearing housing bore during this process. The sliding bearings are fed one by one via a liquid nitrogen conveyor chain, shrinking after freezing before reaching their designated positions. They are then transferred to the bearing housing bore via a first positioning feeder 4, and pressed by the combined press-fit mechanism 6. The pressed-fit guide assembly is then sorted and unloaded by a material distribution fixture 7. This process not only freezes the sliding bearings with liquid nitrogen to ensure they shrink before installation, but also allows the outer surface of the sliding bearing to fully contact the bearing housing bore after installation, achieving an interference fit. This effectively reduces deformation during pressure installation, lowers the scrap rate of the sliding bearings, improves the efficiency of the press-fit process, and allows for sorting and collecting materials based on different pressing forces, thus improving processing quality.

[0037] For example, such as Figure 2 and Figure 3As shown, the liquid nitrogen conveying chain 2 includes a housing 201; a hinged flap 202 is hinged to the top of the housing 201; two sets of telescopic support rods 203 are symmetrically arranged on the two side walls of the flap 202; a sealing cotton 204 is provided on the top of the housing 201; two sets of conveying chains 205 are provided inside the housing 201; each set of conveying chains 205 is composed of several sets of chain plates connected end to end in sequence; several sets of leakage holes are evenly distributed on the top of each set of chain plates; each set of conveying chains 205... Two sets of support plates 206 are symmetrically arranged on both sides of the chain 205; two sets of guide plates 207 are symmetrically arranged on the top of each set of conveyor chains 205; two sets of protective boxes 208 are symmetrically arranged at both ends of the four sets of support plates 206; two sets of baffles 209 are symmetrically arranged below both ends of the sealing cotton 204; three sets of sealing plates 211 are arranged in parallel inside the box 201; two sets of pull rods 212 are symmetrically arranged at both ends of the three sets of sealing plates 211; two sets of support plates 206 are symmetrically arranged at both ends of each set of support plates 206. Each set of four sets of adjustment slots 213 are symmetrically provided; each set of pull rods 212 moves through the corresponding four sets of adjustment slots 213; each set of support plates 206 has several sets of air guide holes 214 at equal intervals; each set of sealing plates 211 has several sets of air guide holes 215 at equal intervals; each set of air guide holes 215 is movably connected to the corresponding air guide hole 214; the two side walls of the housing 201 are respectively provided with an air inlet pipe 218 and an exhaust pipe 21. 0; The housing 201 is equipped with a freeze dryer 216 and an exhaust fan 217; the input end of the freeze dryer 216 is connected to the air inlet pipe 218, and the output end is connected to several sets of corresponding air guide holes 215; the cold source of the freeze dryer 216 is liquid nitrogen; the input end of the exhaust fan 217 is connected to several sets of corresponding air guide holes 215, and the output end is connected to the exhaust pipe 210; a liquid nitrogen inlet and outlet 219 is provided on one side wall of the bottom of the housing 201.

[0038] Before feeding liquid nitrogen into the feed port of the conveyor chain 2, close the flip cover 202. Then, by pulling the lever 212, connect the several sets of air guide holes 215 on the three sets of sealing plates 211 to the corresponding air guide holes 214. Then, start the freeze dryer 216 and the exhaust fan 217. The cold source of the freeze dryer 216 can be liquid nitrogen, which continuously supplies dry cold air to the freeze conveying area. When the air humidity in the freeze conveying area drops to the corresponding standard, turn off the freeze dryer 216 and the exhaust fan 217. Then, pull the lever 212 in the opposite direction to seal the freeze conveying area. By drying and pre-cooling the freeze conveying area in advance, not only can water vapor be effectively prevented from condensing on the surface of the sliding bearing, but the risk of damage caused by thermal stress to the conveyor chain 205 and other related structures when the temperature changes suddenly during the spraying of liquid nitrogen in the freeze conveying area can also be reduced.

[0039] For example, such as Figure 4 and Figure 5As shown, the positioning and feeding fixture 4 includes two sets of linear guide rails 401 and 402 that are staggered; clamping assembly 403 and clamping assembly 404 are respectively connected to the output ends of linear guide rail 401 and linear guide rail 402; two sets of inner support seats 405 are arranged in parallel between linear guide rail 401 and linear guide rail 402.

[0040] The clamp assembly 403 includes an insulated container 40301; an electric push rod 40302 is provided at the top of the insulated container 40301; a heat insulation ring 40303 is provided inside the insulated container 40301; a vacuum insulation cavity 40304 is provided between the outer wall of the heat insulation ring 40303 and the inner wall of the insulated container 40301; a heat insulation ring 40305 is provided at the bottom of the heat insulation ring 40303 and the insulated container 40301; the output end of the electric push rod 40302 extends into the insulated container 40301 and is connected to a mounting cover 40306; a rotating ring 40307 is provided on the inner wall of the mounting cover 40306; a mounting bracket 4030 is connected to the inner wall of the rotating ring 40307. 8; A movable block 40309 is slidably connected to the top inner wall of the mounting bracket 40308; a drive screw 40310 is provided inside the mounting bracket 40308; the drive screw 40310 is threadedly connected to the movable block 40309; an air guide column 40311 is provided at the bottom of the movable block 40309; several sets of telescopic grooves 40312 are arranged in a ring array on the bottom inner wall of the air guide column 40311; the side view cross section of each set of telescopic grooves 40312 is fan-shaped; a set of telescopic columns 40313 is movably inserted through each set of telescopic grooves 40312; a set of heat-insulating contact blocks 40314 is provided at the end of each set of telescopic columns 40313 away from the air guide column 40311.

[0041] The liquid nitrogen conveyor chain 2 slowly transports the sliding bearing to the positioning and loading fixture 4. Then, the clamping assembly 403 moves it above the sliding bearing. The electric push rod 40302 then moves the air guide column 40311 into the sliding bearing via the mounting cover 40306 and the movable block 40309. Gas is then injected into the air guide column 40311, causing several sets of telescopic columns 40313 to extend. Several sets of annularly arranged heat-insulating contact blocks 40314 apply uniform pressure to the inner wall of the sliding bearing. This ensures that when the electric push rod 40302 resets the air guide column 40311, it can drive the sliding bearing into the insulation tank 40301. The insulation tank 40301 is equipped with... The vacuum insulation chamber 40304 and the insulation ring 40303 are equipped with an insulation ring 40305 at the bottom. This not only avoids the problem of increased brittleness of the sliding bearing after freezing and shrinkage, which is prone to cracking by the existing external clamping method, but also avoids the problem of the sliding bearing expanding too quickly after leaving the liquid nitrogen conveying chain 2, which would affect the subsequent pressing work. Then, the linear guide 401 is controlled to transfer the sliding bearing to the inner support 405, and the linear guide 402 and the clamping assembly 404 transfer the sliding bearing to the combined pressing mechanism 6. The clamping assembly 404 aligns the sliding bearing with the bearing seat hole by external clamping, and then the combined pressing mechanism 6 presses the sliding bearing into the bearing seat hole.

[0042] For example, such as Figure 6 , Figure 7 and Figure 8 As shown, the combined pressing mechanism 6 includes a second mounting frame 601 and a drive base 602; the top of the second mounting frame 601 is provided with a first pressing cylinder 603 and a second pressing cylinder 604; the output end of the first pressing cylinder 603 extends to the bottom of the second mounting frame 601 and is drivenly connected to a first pressure component 605; the output end of the second pressing cylinder 604 extends to the bottom of the second mounting frame 601 and is drivenly connected to a second pressure component 606; three sets of limiting clamping assemblies 607 are drivenly connected in parallel on the conveying end of the drive base 602; pressure sensors are provided inside both the first pressure component 605 and the second pressure component 606.

[0043] When pressing the sliding bearing into the bearing housing bore, the sliding bearing is pressed into the bearing housing bore in two stages.

[0044] The limiting clamping assembly 607 includes a clamp 60701; two sets of clamping blocks 60702 are symmetrically connected to the output end of the clamp 60701; two sets of telescopic grooves 60703 are symmetrically opened on the top of the two sets of clamping blocks 60702; a set of protective plates 60704 is movably passed through the top of each set of telescopic grooves 60703; the top view of each set of protective plates 60704 is a fan-shaped cross section; a set of protective plates 60705 is movably passed through both ends of each set of protective plates 60704; a set of slots 60706 is opened at the bottom of the end of each set of protective plates 60705 away from the protective plates 60704; several sets of springs 60707 are provided in each set of protective plates 60704 for ejecting the corresponding protective plates 60705; each set Each of the two telescopic grooves 60703 has a set of electromagnets 60708 on its bottom inner wall; each set of electromagnets 60708 is magnetically connected to a corresponding set of protective plates 60704; each of the two telescopic grooves 60703 has several sets of gas springs 60709 on its bottom inner wall; the top of each set of gas springs 60709 is connected to the bottom of a corresponding set of protective plates 60704; each of the two inner walls of each telescopic groove 60703 has a set of locking blocks 60710 slidably connected; each set of locking blocks 60710 moves through a corresponding set of locking slots 60706; each set of locking blocks 60710 has a set of gas springs 60711 on its top; the top of each set of gas springs 60711 is connected to the bottom of a corresponding set of protective plates 60705.

[0045] During the press-fitting of the sliding bearing and bearing housing hole, the bearing housing hole is fixed within the limiting clamping assembly 607. When the sliding bearing is misfitted during press-fitting, the corresponding alarm will sound and the combined press-fitting mechanism 6 will be de-energized. At this time, the electromagnet 60708 will be de-energized and demagnetized. Under the action of the corresponding gas spring 60709, the two sets of protective plates 60704 will pop out of the telescopic groove 60703. When the locking blocks 60710 on both sides slide up and hit the top of the slide groove, they will disengage from the corresponding locking groove 60706, so that the protective plates 60705 on both sides of each set of protective plates 60704 will pop out quickly, protecting the press-fitting area and preventing the sliding bearing from becoming brittle after freezing and shrinking, which can easily cause it to crack and break off when the pressure is misaligned. This improves the safety of the press-fitting operation.

[0046] For example, such as Figure 9As shown, the unloading and diversion tooling 7 includes a straight conveyor belt 701; a storage bin 702 and a product diversion trough 703 are provided on one side of the straight conveyor belt 701; an unloading cylinder 704 is provided on the side of the straight conveyor belt 701 away from the storage bin 702; a pusher plate 705 is drivenly connected to the output end of the unloading cylinder 704; two sets of unloading cylinders 706 are arranged in parallel on the side of the straight conveyor belt 701 away from the product diversion trough 703; a pusher plate 707 is drivenly connected to the output end of each set of unloading cylinders 706; each set of pusher plates 707 faces a corresponding set of openings in the product diversion trough 703.

[0047] After the combined pressing mechanism 6 completes the processing, the product diversion channel 703 tests the pressing force of the corresponding pressure sensor classification guide assembly. The channel near the storage bin 702 will discharge products with excessive pressing force, while the other channel will discharge products with insufficient pressing force. Products with qualified pressing force will be transported to the position of the discharge cylinder 704 via the straight conveyor belt 701 and discharged into the storage bin 702.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automated frozen filling production line, including a filling platform, characterized in that: The pressing platform has a liquid nitrogen conveyor chain on one side wall; a rotary feeder is installed on the side wall of the pressing platform perpendicular to the liquid nitrogen conveyor chain; positioning feeder one and positioning feeder two are respectively installed on the two perpendicular sides of the top of the pressing platform; the input ends of positioning feeder one and positioning feeder two are connected to the output ends of the liquid nitrogen conveyor chain and the rotary feeder, respectively; a combined pressing mechanism is installed on the top of the pressing platform; a discharge diversion tool is installed at the output end of the combined pressing mechanism; The combined pressing mechanism includes a second mounting frame and a drive base; the top of the second mounting frame is provided with a first pressing cylinder and a second pressing cylinder; the output end of the first pressing cylinder extends to the bottom of the second mounting frame and is connected to a pressure component; the output end of the second pressing cylinder extends to the bottom of the second mounting frame and is connected to a pressure component; three sets of limit clamping assemblies are connected in parallel to the conveying end of the drive base; pressure sensors are provided inside both the first and second pressure components. The positioning and feeding fixture includes two sets of linear guide rails 1 and 2 that are staggered; clamping assembly 1 and clamping assembly 2 are respectively connected to the output ends of linear guide rail 1 and linear guide rail 2. The liquid nitrogen conveying chain includes a housing; the housing contains two sets of conveying chains; each set of conveying chains has two sets of support plates symmetrically arranged on both sides; the housing contains three sets of sealing plates arranged in parallel; each set of support plates has several sets of air guide holes (I) at equal intervals; each set of sealing plates has several sets of air guide holes (II) at equal intervals; each set of air guide holes (II) is movably connected to the corresponding set of air guide holes (I); the housing contains an air inlet pipe and an air outlet pipe on its two side walls; the housing contains a freeze dryer and an exhaust fan; the freeze dryer's input end is connected to the air inlet pipe, and its output end is connected to the corresponding sets of air guide holes (II); the exhaust fan's input end is connected to the corresponding sets of air guide holes (II), and its output end is connected to the exhaust pipe. The clamp assembly includes an insulated bucket; an electric push rod is provided at the top of the insulated bucket; a heat insulation ring is provided inside the insulated bucket; a vacuum heat insulation cavity is provided between the outer wall of the heat insulation ring and the inner wall of the insulated bucket; a heat insulation ring is provided at the bottom of the heat insulation ring and the insulated bucket; the output end of the electric push rod extends into the insulated bucket and is connected to a mounting cover; a rotating ring is provided on the inner wall of the mounting cover; a mounting bracket is connected to the inner wall of the rotating ring; a movable block is slidably connected to the top inner wall of the mounting bracket; a drive screw is provided inside the mounting bracket; the drive screw is threadedly connected to the movable block; a guide column is provided at the bottom of the movable block; several sets of telescopic grooves are arranged in a ring array on the bottom inner wall of the guide column; the side view cross-section of each set of telescopic grooves is fan-shaped; a set of telescopic columns is movably inserted through each set of telescopic grooves; a set of heat-insulating contact blocks are provided at the end of each set of telescopic columns away from the guide column.

2. The automatic frozen filling production line according to claim 1, characterized in that: The top of the box is hinged with a flip cover; two sets of telescopic support rods are symmetrically arranged on the two side walls of the flip cover; the top of the box is provided with sealing cotton; each set of conveyor chains consists of several sets of chain plates connected one end to the other in sequence; several sets of leakage holes are evenly distributed on the top of each set of chain plates; two sets of guide plates are symmetrically arranged on the top of each set of conveyor chains; two sets of protective boxes are symmetrically arranged at both ends of the four sets of support plates.

3. The automatic frozen filling production line according to claim 2, characterized in that: Two sets of baffles are symmetrically arranged below both ends of the sealing cotton; two sets of pull rods are symmetrically arranged at both ends of the three sets of sealing plates; two sets of adjustment slots are symmetrically opened at both ends of each set of support plates; and each set of pull rods moves through the corresponding four sets of adjustment slots.

4. The automatic frozen filling production line according to claim 3, characterized in that: The cold source of the freeze dryer is liquid nitrogen; a liquid nitrogen inlet and outlet are provided on one side wall of the bottom of the chamber; two sets of internal support seats are provided in parallel between the linear guide rail one and the linear guide rail two.

5. The automatic frozen filling production line according to claim 1, characterized in that: The limiting clamping assembly includes a clamp; two sets of clamping blocks are symmetrically connected to the output end of the clamp; two sets of telescopic grooves are symmetrically opened on the top of the two sets of clamping blocks; a set of protective plates is movably passed through the top of each set of telescopic grooves; the top view of each set of protective plates is a fan-shaped cross section; a set of protective plates is movably passed through both ends of each set of protective plates; a set of slots is opened at the bottom of the end of each set of protective plates away from the protective plate.

6. The automated frozen filling production line according to claim 5, characterized in that: Each set of protective plates is equipped with several sets of springs for ejecting the corresponding protective plates; each set of telescopic grooves has a set of electromagnets on the bottom inner wall; each set of electromagnets is magnetically connected to the corresponding set of protective plates; each set of telescopic grooves has several sets of gas springs on the bottom inner wall.

7. The automatic frozen filling production line according to claim 6, characterized in that: The top of each set of gas springs is connected to the bottom of the corresponding set of protective plates; a set of locking blocks are slidably connected to the inner walls on both sides of each set of telescopic grooves; each set of locking blocks moves through the corresponding set of locking grooves; a set of gas springs is provided on the top of each set of locking blocks; the top of each set of gas springs is connected to the bottom of the corresponding set of protective plates.

8. The automatic frozen filling production line according to claim 1, characterized in that: The material feeding and diversion fixture includes a linear conveyor belt; a storage bin and a product diversion trough are provided on one side of the linear conveyor belt; a material feeding cylinder is provided on the side of the linear conveyor belt away from the storage bin; a pusher plate is driven to the output end of the material feeding cylinder; two sets of material feeding cylinders are provided in parallel on the side of the linear conveyor belt away from the product diversion trough; a pusher plate is driven to the output end of each set of material feeding cylinders; each set of pusher plates faces a corresponding set of openings in the product diversion trough.

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