A powder metallurgy device for gear production

Abstract

The present invention relates to the field of powder metallurgy, and in particular to a powder metallurgy device for gear production. The technical problem is that when the existing device feeds, part of the raw materials will be scattered on the edge of the mold and the workbench, resulting in large losses, and it is inconvenient to remove the residual raw materials in the mold. The amount of raw materials during each molding will be different, which will lead to poor overall uniformity of the product after molding. A powder metallurgy device for gear production includes a base frame, a fixed seat arranged on the top of the base frame, a side cover clamped to one side of the fixed seat, and four hydraulic push rods arranged on the top of the base frame. The raw materials are filled between the two rotating frames by the rotation of the upper rotating frame, the upper rotating frame rotates in the opposite direction to limit the upper raw materials, and the lower rotating frame rotates, and the raw materials between the two rotating frames fall into mold 2, which can facilitate quantitative feeding directly from the inside of the mold, reduce the loss caused by feeding, and improve the overall uniformity of the product after molding.

Description

Technical Field

[0001] The invention relates to the field of powder metallurgy, and in particular to a powder metallurgy device for gear production. Background Art

[0002] Powder metallurgy is a technology that uses metal powder as raw material to manufacture metal products through mixing, forming and sintering process steps. Its basic principle is to use the plasticity and fluidity of metal powder to form the desired shape by pressing in a mold. Due to its high efficiency and high utilization rate of raw materials, it has become the mainstream production method of small gears.

[0003] When existing gear powder metallurgy devices are forming gears, the raw materials are generally first fed into the mold through a feeder, and then the mold is driven by a hydraulic device to press the raw materials into shape. After forming, the product is sintered to obtain the final product. However, when feeding, the existing gear powder metallurgy devices usually pour the raw materials directly into the mold from the top of the mold, and some of the raw materials will be scattered on the edge of the top of the mold and the workbench, causing large losses during feeding, and it is not convenient to remove the residual raw materials in the mold after discharging. The amount of raw materials during each forming will be different, which will lead to poor overall uniformity of the formed product. Summary of the invention

[0004] In order to overcome the shortcomings of the existing gear powder metallurgy device, that is, during feeding, part of the raw material will be scattered on the edge of the top of the mold and the workbench, resulting in large loss during feeding, and it is inconvenient to remove the residual raw material in the mold after discharging, and the amount of raw material will be different during each molding, which leads to poor overall uniformity of the product after molding. The present invention provides a powder metallurgy device for gear production that can conveniently and directly perform quantitative feeding from the inside of the mold, reduce the loss caused during feeding, and can easily remove the residual raw material in the mold after discharging, so that the difference in the amount of raw material during each molding is smaller, and the overall uniformity of the product after molding is improved.

[0005] The technical implementation scheme of the present invention is: a powder metallurgy device for gear production, comprising: a chassis;

[0006] A fixing seat is arranged on the top of the base frame, and a mounting cavity is arranged on one side of the fixing seat;

[0007] A side cover clamped to one side of the fixing base;

[0008] Four hydraulic push rods are arranged on the top of the base frame, and the four hydraulic push rods are fixedly connected to the fixing seat;

[0009] A lower pressure plate fixedly connected between the four hydraulic push rod telescopic rods;

[0010] A mold 1 fixed to the bottom of the lower pressing plate;

[0011] A second mold is arranged on a fixed seat;

[0012] A feeding mechanism arranged on the fixed seat and the lower pressing plate;

[0013] The discharging mechanism is arranged on the fixing seat and the feeding mechanism.

[0014] Optionally, the feeding mechanism includes a storage rack fixedly connected to one side of the top of the fixed seat, a feeding pipe fixedly connected to the lower part of the storage rack, the lower end of the feeding pipe passes through the fixed seat and mold 2, two rotating racks rotatably connected to the feeding pipe, two protective sleeves fixedly connected to the outer wall of the feeding pipe, the two rotating racks are rotatably connected to the two protective sleeves respectively, two torsion springs are respectively arranged between the two rotating racks and the feeding pipe, the two torsion springs are respectively located in the two protective sleeves, and a transmission assembly is arranged on the fixed seat, the lower pressure plate and the rotating rack.

[0015] Optionally, the feed pipe is arranged at an inclination.

[0016] Optionally, the transmission assembly includes two overrunning clutches 1 respectively fixed to the two rotating frames, two gears 1 respectively fixed to the outer rings of the two overrunning clutches 1, a sliding frame slidably connected to the fixed seat, the upper part of the sliding frame is fixed to one side of the lower pressure plate, two racks 1 fixed to the sliding frame, the two racks 1 are staggered, the sliding frame moves downward and drives the two racks 1 to move downward, one of the racks 1 first meshes with the upper gear 1 and drives the upper gear 1 to rotate, the upper gear 1 drives the upper rotating frame to rotate through the upper overrunning clutch 1, one of the racks 1 continues to move downward and disengages from the upper gear 1, the other rack 1 continues to move downward and meshes with the lower gear 1 and drives the lower gear 1 to rotate, and the metal raw material powder between the two rotating frames will all fall into the mold 2.

[0017] Optionally, the discharging mechanism includes a limiting frame slidably connected to the lower part of the fixed seat, a slot frame fixed to one side of the limiting frame, a straight slot on the slot frame, and a rotating component arranged on the fixed seat and the sliding frame.

[0018] Optionally, the rotating component includes a turntable rotatably connected to the lower part of the fixed seat, a contact shaft fixedly connected to the turntable, one end of the contact shaft is located in a slot of the slot frame, an overrunning clutch 2 fixedly connected to the turntable, a gear 2 fixedly connected to the outer ring of the overrunning clutch 2, and a rack 2 fixedly connected to the lower part of the sliding frame.

[0019] Optionally, it also includes a residue removal mechanism arranged on the fixed seat and the limit frame, the residue removal mechanism is used to remove the residual raw materials in the mold 2 after discharging, the residue removal mechanism includes a contact frame slidably connected to the mounting cavity of the fixed seat, the lower part of the contact frame is fixedly connected to one side of the limit frame, an air compressor fixedly connected to the mounting cavity of the fixed seat, a solenoid valve fixedly connected to the air outlet of the air compressor storage tank, an air pipe fixedly connected to the bottom of the solenoid valve, the lower end of the air pipe passes through the fixed seat and the mold 2, and is fixedly connected to a normally closed switch on the solenoid valve, and the normally closed switch is electrically connected to the solenoid valve.

[0020] Optionally, it also includes a scraping mechanism arranged on the fixed seat and the turntable, the scraping mechanism is used to remove the raw materials remaining on the top of the limiting frame, the scraping mechanism includes a rubber strip fixed to the edge of the turntable, a transmission frame slidably connected to the fixed seat, two return springs arranged between the transmission frame and the fixed seat, and a scraper frame fixed to one side of the transmission frame.

[0021] Optionally, it also includes a material guide frame slidably connected to the base frame, and two buffer springs arranged between the material guide frame and the base frame.

[0022] Optionally, the material guide frame is provided with an inclined surface.

[0023] Compared with the prior art, the present invention has the following advantages: 1. By rotating the upper rotating rack, the metal raw material powder in the storage rack is filled between the two rotating racks. The upper rotating rack rotates in the opposite direction to limit the upper metal raw material powder again. The lower rotating rack rotates, and the metal raw material powder between the two rotating racks will all fall into the second mold. The limiting rack limits the metal raw material powder that falls into the second mold, which can facilitate quantitative feeding directly from the inside of the mold, reduce the loss caused by feeding, and improve the overall uniformity of the product after molding.

[0024] 2. The contact frame is driven by the limit frame to move horizontally toward the direction close to the normally closed switch. When the contact shaft rotates 180 degrees, the limit frame is out of contact with the bottom of the mold 2. At this time, the contact frame presses the normally closed switch, so that the solenoid valve is powered on and the valve is opened. The high-pressure gas in the air compressor tank is ejected through the solenoid valve and the air pipe, and the residual raw material in the mold 2 is sprayed out from the bottom of the mold 2, which can facilitate the removal of the residual raw material in the mold after discharging, so that the difference in the amount of raw materials during each molding is smaller, and the overall uniformity of the product after molding is further improved.

[0025] 3. When the turntable rotates 180 degrees, the rubber strip disengages from the bottom of the transmission frame, the reset spring rebounds and drives the transmission frame to move downward, the transmission frame drives the scraper frame to move downward, the scraper frame contacts the top of the limit frame, and the limit frame moves in the opposite direction. The scraper frame scrapes off the raw material adhering to the top of the limit frame, and can remove the residual raw material on the top of the limit frame, further making the difference in the amount of raw materials during each molding smaller, and further improving the overall uniformity of the product after molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the disassembled three-dimensional structure of the base frame, the fixing seat, the side cover, the hydraulic push rod, the lower pressing plate, the mold 1 and the mold 2 of the present invention.

[0028] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0029] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the feeding mechanism of the present invention.

[0030] Figure 5 It is a schematic diagram of the split three-dimensional structure of the feeding mechanism of the present invention.

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the sliding frame, rack 1 and rack 2 of the present invention.

[0032] Figure 7 It is a cross-sectional three-dimensional structural schematic diagram of the scraping mechanism, the material guide frame and the buffer spring of the present invention.

[0033] Figure 8 It is a schematic diagram of the split three-dimensional structure of the discharging mechanism of the present invention.

[0034] Fig. 9 It is a schematic diagram of the disassembled three-dimensional structure of the scraping mechanism of the present invention.

[0035] Fig.10 It is a schematic diagram of the split three-dimensional structure of the residual removal mechanism of the present invention.

[0036] The markings of the components in the accompanying drawings are as follows: 1: base frame, 2: fixed seat, 3: side cover, 4: hydraulic push rod, 5: lower pressure plate, 6: mold one, 7: mold two, 81: storage rack, 82: feeding pipe, 83: rotating rack, 84: protective cover, 85: torsion spring, 86: overrunning clutch one, 87: gear one, 88: sliding rack, 89: rack one, 91: limit rack, 92: slot rack, 93: turntable, 94: contact shaft, 95: overrunning clutch two, 96: gear two, 97: rack two, 101: contact rack, 102: air compressor, 103: solenoid valve, 104: air pipe, 105: normally closed switch, 111: rubber strip, 112: transmission rack, 113: reset spring, 114: scraper rack, 12: guide rack, 13: buffer spring. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0038] Example 1: A powder metallurgy device for gear production, such as Figure 1-Figure 9 As shown, it includes a base frame 1;

[0039] A fixing base 2 is welded to the top of the base frame 1, and a mounting cavity is provided on one side of the fixing base 2;

[0040] A side cover 3 is clamped to one side of the fixing base 2, and the side cover 3 covers the installation cavity of the fixing base 2. The side cover 3 is used to protect the parts in the installation cavity of the fixing base 2;

[0041] Four hydraulic push rods 4 are connected to the top of the base frame 1 by bolts. The hydraulic push rods 4 are perpendicular to the base frame 1 and are fixed to the fixing seat 2.

[0042] A lower pressing plate 5 welded between the telescopic rods of the four hydraulic push rods 4;

[0043] A mold 1 6 is fixedly connected to the bottom of the lower pressing plate 5. The mold 1 6 is located above the fixed seat 2. The hydraulic push rod 4 drives the lower pressing plate 5 to move, thereby driving the mold 1 6 to move.

[0044] A mold 2 7 is disposed on the fixed seat 2, and the mold 2 7 and the mold 1 6 are located on the same center line;

[0045] A feeding mechanism disposed on the fixing seat 2 and the lower pressing plate 5, the feeding mechanism being used to add raw materials into the second mold 7;

[0046] The discharging mechanism is arranged on the fixing seat 2 and the feeding mechanism, and is used for discharging the material after the work is finished.

[0047] The feeding mechanism includes a storage rack 81 fixed to one side of the top of the fixed seat 2, a feeding pipe 82 fixed to the lower part of the storage rack 81, the feeding pipe 82 is connected to the storage rack 81, the lower end of the feeding pipe 82 passes through the fixed seat 2 and the mold 2 7, and is rotatably connected to two rotating racks 83 in the feeding pipe 82, and the rotating racks 83 are used to limit the raw materials, and two protective sleeves 84 are fixed to the outer wall of the feeding pipe 82. The two rotating racks 83 are rotatably connected to the two protective sleeves 84 respectively, and two torsion springs 85 are respectively arranged between the two rotating racks 83 and the feeding pipe 82. The two torsion springs 85 are respectively located in the two protective sleeves 84, and the protective sleeves 84 are used to prevent the torsion springs 85 from being stuck by impurities, and a transmission component arranged on the fixed seat 2, the lower pressure plate 5 and the rotating rack 83.

[0048] The feed tube 82 is tilted, and the tilted setting enables the raw materials in the feed tube 82 to flow into the mold 2 7 more smoothly.

[0049] The transmission assembly includes two overrunning clutches 86 respectively fixed to the two rotating frames 83, two gears 87 respectively fixed to the outer rings of the two overrunning clutches 86, a sliding frame 88 slidably connected to the fixed seat 2, the upper part of the sliding frame 88 is fixed to one side of the lower pressure plate 5, and two racks 89 fixed to the sliding frame 88. The two racks 89 are staggered. The sliding frame 88 moves downward to drive the two racks 89 to move downward. One of the racks 89 first meshes with the upper gear 87 and drives the upper gear 87. 87 rotates, the upper gear 87 drives the upper rotating frame 83 to rotate through the upper overrunning clutch 86, one of the racks 89 continues to move downward and disengages from the upper gear 87, the other rack 89 continues to move downward and engages with the lower gear 87, and drives the lower gear 87 to rotate, the metal raw material powder between the two rotating frames 83 will all fall into the mold 27, the sliding frame 88 drives the gear 87 to rotate through the rack 89, and then drives the rotating frame 83 to rotate through the overrunning clutch 86.

[0050] The discharging mechanism includes a limit frame 91 slidably connected to the lower part of the fixed seat 2, the limit frame 91 contacts the bottom of the mold 2 7, and the limit frame 91 covers the through opening at the bottom of the mold 2 7, the limit frame 91 is used to limit the raw material in the mold 2 7, and a groove frame 92 is fixedly connected to one side of the limit frame 91, and the groove frame 92 has a straight groove, which is arranged on the fixed seat 2 and the rotating component on the sliding frame 88.

[0051] The rotating assembly includes a turntable 93 rotatably connected to the lower part of the fixed base 2, a contact shaft 94 fixedly connected to the turntable 93, one end of the contact shaft 94 is located in the I-shaped groove of the groove frame 92, the turntable 93 drives the groove frame 92 to move through the contact shaft 94, and then drives the limit frame 91 to move, an overrunning clutch 2 95 fixedly connected to the turntable 93, a gear 2 96 fixedly connected to the outer ring of the overrunning clutch 2 95, and a rack 2 97 fixedly connected to the lower part of the sliding frame 88, the sliding frame 88 drives the gear 2 96 to rotate through the rack 2 97, and then drives the turntable 93 to rotate through the overrunning clutch 2 95.

[0052] Initially, the storage rack 81 is connected to the feeding system, and the storage rack 81 is filled with metal raw material powder. A rotating rack 83 at the top limits the metal raw material powder above it, and the limiting rack 91 covers the opening at the bottom of the mold 2 7. After starting work, the staff controls the telescopic rod of the hydraulic push rod 4 to retract, and the telescopic rod of the hydraulic push rod 4 moves downward to drive the lower pressure plate 5 to move downward, and the lower pressure plate 5 moves downward to drive the sliding rack 88 and the mold 1 6 to move downward, and the sliding rack 88 moves downward to drive two racks 1 89 and rack 2 97 to move downward, and one of the racks 1 89 first meshes with a gear 1 87 at the top, and drives a gear 1 87 at the top to rotate, and the gear 1 87 at the top passes through the overrunning clutch 1 86 at the top. The upper rotating frame 83 is driven to rotate, and the upper torsion spring 85 is twisted. The upper rotating frame 83 no longer limits the metal raw material powder. Under the action of gravity, the metal raw material powder in the storage frame 81 will fill the space between the two rotating frames 83. The lower rotating frame 83 limits the metal raw material powder between the two rotating frames 83. One of the racks 89 continues to move downward and disengages from the upper gear 87. The upper torsion spring 85 rebounds and drives the upper overrunning clutch 86, the upper rotating frame 83 and the upper gear 87 to rotate in the opposite direction and reset. The upper rotating frame 83 limits the upper metal raw material powder again, and then another gear 89 is released. The rack 89 continues to move downward and meshes with a gear 87 at the bottom, and drives the gear 87 at the bottom to rotate. The gear 87 at the bottom drives the rotating frame 83 at the bottom to rotate through the overrunning clutch 86 at the bottom. The torsion spring 85 at the bottom is twisted. Under the action of gravity, the metal raw material powder between the two rotating frames 83 will all fall into the mold 27. The limiting frame 91 limits the metal raw material powder falling into the mold 27. Through the above operation, quantitative feeding can be conveniently carried out directly from the inside of the mold, reducing the loss caused by feeding and improving the overall uniformity of the product after molding. After the metal raw material powder between the two rotating frames 83 has all flowed out, the other rack 89 continues to move downward and meshes with the lower gear 87. The gear 1 87 below is disengaged, the torsion spring 85 below will rebound and drive the overrunning clutch 1 86 below, the rotating frame 83 below and the gear 1 87 below to rotate in the opposite direction and reset, the rack 2 97 continues to move downward to mesh with the gear 2 96 and drive the gear 2 96 to rotate. Under the action of the overrunning clutch 2 95, the turntable 93 will not rotate, and the mold 1 6 continues to move downward to compact the metal raw material powder at the bottom of the mold 2 7, so that the metal raw material powder in the mold 2 7 is combined into a gear. After the gear is compacted and formed, the staff controls the telescopic rod of the hydraulic push rod 4 to extend, and the telescopic rod of the hydraulic push rod 4 moves upward to drive the lower pressing plate 5 to move upward, and the lower pressing plate 5 moves upward to drive the sliding frame 88 and the mold 1 6 to move upward.The sliding frame 88 moves upward, driving the two racks 1 89 and the rack 2 97 to move upward. The rack 2 97 moves upward, driving the gear 2 96 to rotate in the opposite direction. Under the action of the overrunning clutch 2 95, the turntable 93 rotates and drives the contact shaft 94 to rotate. The rotation of the contact shaft 94 drives the slot frame 92 to move horizontally. The horizontal movement of the slot frame 92 drives the limit frame 91 to move horizontally. The limit frame 91 no longer covers the opening at the bottom of the mold 2 7. Under the action of gravity, the molded gear will fall downward and leave the mold 2 7. After the contact shaft 94 rotates 180 degrees, it continues to rotate, driving the slot frame 92 to move in the opposite direction. The slot frame 92 moves in the opposite direction. The movement drives the limit frame 91 to move in the opposite direction, and the limit frame 91 covers the opening at the bottom of the mold 2 7 again. The rack 2 97 continues to move upward and disengages from the gear 2 96. The two racks 1 89 continue to move upward and will respectively mesh with the two gears 1 87 in turn, and respectively drive the gears 1 87 to rotate in the opposite direction. Under the action of the two overrunning clutches 1 86, the two rotating frames 83 will not rotate. Then the staff repeats the above operation many times until the raw materials are consumed. Finally, the staff puts all the gears that have been formed into the sintering furnace for sintering. After sintering, wait for them to cool down to obtain the gears of the final product.

[0053] Embodiment 2: Based on embodiment 1, Figure 3 , Figure 7 , Fig. 9 and Fig.10 As shown, it also includes a residue removal mechanism arranged on the fixed seat 2 and the limiting frame 91, the residue removal mechanism is used to remove the residual raw materials in the mold 2 7 after discharging, and the residue removal mechanism includes a contact frame 101 slidably connected to the mounting cavity of the fixed seat 2, the lower part of the contact frame 101 is welded to one side of the limiting frame 91, and is connected to the air compressor 102 in the mounting cavity of the fixed seat 2 by bolts, and is fixed to the solenoid valve 103 at the air outlet of the air storage tank of the air compressor 102, and is fixed to the air supply pipe 104 at the bottom of the solenoid valve 103, the lower end of the air supply pipe 104 passes through the fixed seat 2 and the mold 2 7, and is fixed to the normally closed switch 105 on the solenoid valve 103, and the normally closed switch 105 is electrically connected to the solenoid valve 103, and the limiting frame 91 presses the normally closed switch 105 through the contact frame 101, thereby controlling the solenoid valve 103 to open the valve, and the high-pressure gas in the air storage tank of the air compressor 102 is supplied into the mold 2 7 through the air supply pipe 104.

[0054] It also includes a scraping mechanism arranged on the fixed seat 2 and the turntable 93, the scraping mechanism is used to remove the raw materials remaining on the top of the limit frame 91, the scraping mechanism includes a rubber strip 111 bonded to the edge of the turntable 93 by an adhesive, a transmission frame 112 slidably connected to the fixed seat 2, the bottom of the transmission frame 112 contacts the edge of the turntable 93, two return springs 113 arranged between the transmission frame 112 and the fixed seat 2, the two return springs 113 are symmetrically arranged, and a scraper frame 114 is fixed to one side of the transmission frame 112. The turntable 93 drives the transmission frame 112 to move through the rubber strip 111, and then drives the scraper frame 114 to move, and the bottom of the scraper frame 114 contacts the top of the limit frame 91.

[0055] It also includes a guide frame 12 slidably connected to the base frame 1, and two buffer springs 13 arranged between the guide frame 12 and the base frame 1. The two buffer springs 13 are symmetrically arranged, and the buffer springs 13 are used to provide buffering when the gear is unloading.

[0056] The guide rack 12 is provided with an inclined surface, and the inclined surface on the guide rack 12 is used to guide the falling gears. The inclined surface of the guide rack 12 is located below the mold 2 7.

[0057] Initially, the solenoid valve 103 is in a closed state. After the work starts, the staff starts the air compressor 102 to produce high-pressure gas. The solenoid valve 103 limits the high-pressure gas in the air tank of the air compressor 102. When discharging, the limit frame 91 moves horizontally to drive the contact frame 101 to move horizontally in the direction close to the normally closed switch 105. When the contact shaft 94 rotates 180 degrees, the limit frame 91 is out of contact with the bottom of the mold 2 7. At this time, the contact frame 101 presses the normally closed switch 105, so that the solenoid valve 103 is powered on and the valve is opened. The air in the air tank of the air compressor 102 is The high-pressure gas is ejected through the solenoid valve 103 and the gas pipe 104, and the raw material remaining in the mold 2 7 is sprayed down from the bottom of the mold 2 7. Through the above operation, it is convenient to clean the raw material remaining in the mold after discharging, so that the difference in the amount of raw materials during each molding is smaller, and the overall uniformity of the product after molding is further improved. The limit frame 91 moves in the reverse direction to drive the contact frame 101 to move in the reverse direction, and the contact frame 101 is disengaged from the normally closed switch 105, so that the solenoid valve 103 is powered off and the valve is closed. After the work is completed, the staff turns off the air compressor 102 to facilitate the next work.

[0058] Initially, the return spring 113 pushes the scraper frame 114 downward through the transmission frame 112, so that the scraper frame 114 contacts the top of the limit frame 91. When discharging, the turntable 93 rotates to drive the rubber strip 111 to rotate. The rubber strip 111 rotates and contacts the bottom of the transmission frame 112, and pushes the transmission frame 112 upward. The return spring 113 is compressed, and the transmission frame 112 moves upward to drive the scraper frame 114 to move upward. The scraper frame 114 moves upward and loses contact with the top of the limit frame 91. When the turntable 93 rotates 180 degrees, the rubber strip 111 When the bottom of the transmission frame 112 is out of contact, the return spring 113 will rebound and drive the transmission frame 112 to move downward. The downward movement of the transmission frame 112 drives the scraper frame 114 to move downward. The scraper frame 114 moves downward and contacts the top of the limit frame 91. At this time, the limit frame 91 moves in the opposite direction, and the scraper frame 114 scrapes off the raw material adhering to the top of the limit frame 91. Through the above operation, the raw material remaining on the top of the limit frame 91 can be cleared, which further reduces the difference in the amount of raw materials during each molding, and further improves the overall uniformity of the product after molding.

[0059] When discharging, the molded gear falls on the guide rack 12, and the buffer spring 13 provides a buffer for the gear, reducing the probability of excessive impact and wear of the gear when it falls. The inclined surface on the guide rack 12 can guide the gear to one side, reducing the probability of excessive accumulation of gears under the mold 2 7 and affecting the discharge.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder metallurgy device for gear production, characterized by: include, Base frame (1); A fixing seat (2) is arranged on the top of the base frame (1), and a mounting cavity is provided on one side of the fixing seat (2); A side cover (3) clamped to one side of the fixing base (2); Four hydraulic push rods (4) are arranged on the top of the base frame (1), and the four hydraulic push rods (4) are all fixedly connected to the fixed seat (2); A lower pressure plate (5) fixedly connected between the telescopic rods of the four hydraulic push rods (4); A mold 1 (6) fixedly connected to the bottom of the lower pressing plate (5); A second mold (7) disposed on the fixed base (2); A feeding mechanism disposed on the fixed seat (2) and the lower pressing plate (5); A discharging mechanism disposed on the fixed seat (2) and the feeding mechanism; The feeding mechanism comprises a material storage rack (81) fixedly connected to one side of the top of the fixed seat (2), a material discharge pipe (82) fixedly connected to the lower part of the material storage rack (81), the lower end of the material discharge pipe (82) passing through the fixed seat (2) and the mold 2 (7), two rotating racks (83) rotatably connected to the material discharge pipe (82), two protective sleeves (84) fixedly connected to the outer wall of the material discharge pipe (82), the two rotating racks (83) are respectively rotatably connected to the two protective sleeves (84), two torsion springs (85) are respectively arranged between the two rotating racks (83) and the material discharge pipe (82), the two torsion springs (85) are respectively located in the two protective sleeves (84), and a transmission assembly is arranged on the fixed seat (2), the lower pressure plate (5) and the rotating rack (83); the transmission assembly comprises two overrunning clutches (86) respectively fixedly connected to the two rotating racks (83), and two gears (86) respectively fixedly connected to the outer rings of the two overrunning clutches (86). 7), a sliding frame (88) slidably connected to the fixed seat (2), the upper part of the sliding frame (88) is fixed to one side of the lower pressure plate (5), and two racks (89) are fixed to the sliding frame (88). The two racks (89) are staggered. The sliding frame (88) moves downward to drive the two racks (89) to move downward. One of the racks (89) first meshes with the upper gear (87) and drives the upper gear (87) to rotate. The upper gear (87) drives the upper rotating frame (83) to rotate through the upper overrunning clutch (86). One of the racks (89) continues to move downward and disengages from the upper gear (87). The other rack (89) continues to move downward and meshes with the lower gear (87) and drives the lower gear (87) to rotate. The metal raw material powder between the two rotating frames (83) will all fall into the mold (7); The discharging mechanism comprises a limit frame (91) slidably connected to the lower part of the fixed seat (2), a slot frame (92) fixed to one side of the limit frame (91), a straight slot formed on the slot frame (92), and a rotating assembly arranged on the fixed seat (2) and the sliding frame (88).

2. A powder metallurgy device for gear production according to claim 1, characterized in that: The feed pipe (82) is arranged at an inclination.

3. A powder metallurgy device for gear production according to claim 1, characterized in that: The rotating assembly comprises a rotating disk (93) rotatably connected to the lower part of the fixed seat (2), a contact shaft (94) fixedly connected to the rotating disk (93), one end of the contact shaft (94) being located in a straight groove of the groove frame (92), a second overrunning clutch (95) fixedly connected to the rotating disk (93), a second gear (96) fixedly connected to the outer ring of the second overrunning clutch (95), and a second rack (97) fixedly connected to the lower part of the sliding frame (88).

4. A powder metallurgy device for gear production according to claim 3, characterized in that: Also includes, A residue removal mechanism is arranged on the fixed seat (2) and the limiting frame (91), and is used to remove the residual raw materials in the second mold (7) after the material is discharged. The residue removal mechanism comprises a contact frame (101) slidably connected to the mounting cavity of the fixed seat (2), the lower part of the contact frame (101) is fixedly connected to one side of the limiting frame (91), an air compressor (102) fixedly connected to the mounting cavity of the fixed seat (2), a solenoid valve (103) fixedly connected to the air outlet of the air storage tank of the air compressor (102), and an air supply pipe (104) fixedly connected to the bottom of the solenoid valve (103), the lower end of the air supply pipe (104) passes through the fixed seat (2) and the second mold (7), and is fixedly connected to a normally closed switch (105) on the solenoid valve (103), and the normally closed switch (105) is electrically connected to the solenoid valve (103).

5. A powder metallurgy device for gear production according to claim 4, characterized in that: Also includes, A scraping mechanism is arranged on the fixed seat (2) and the rotating disk (93), and is used to remove the raw materials remaining on the top of the limiting frame (91). The scraping mechanism comprises a rubber strip (111) fixedly connected to the edge of the rotating disk (93), a transmission frame (112) slidably connected to the fixed seat (2), two return springs (113) arranged between the transmission frame (112) and the fixed seat (2), and a scraping frame (114) fixedly connected to one side of the transmission frame (112).

6. A powder metallurgy device for gear production according to claim 5, characterized in that: It also includes a material guide frame (12) slidably connected to the base frame (1), and two buffer springs (13) arranged between the material guide frame (12) and the base frame (1).

7. A powder metallurgy device for gear production according to claim 6, characterized in that: The material guide frame (12) is provided with an inclined surface.

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