A powder metallurgy parking brake gear preparation system and preparation method

Abstract

The present invention relates to a powder metallurgy parking brake gear preparation system and a preparation method, belonging to the technical field of powder metallurgy gear preparation. It includes a processing operation frame, a conveying device, and a gear detection device. Inside the processing operation frame, there is a conveying device for conveying powder metallurgy gears, and inside the processing operation frame, there is a gear detection device for detecting the powder metallurgy gears conveyed by the conveying device. The present invention can screen gears. By weighing the prepared gears, gears with a weight greater than or equal to the weight of the standard gear and gears with a weight less than the standard weight are classified and conveyed, effectively realizing the screening of gears and avoiding manual screening, thereby indirectly improving the efficiency of gear preparation. Secondly, it can detect the prepared gears to ensure whether there is breakage at the bottom of the gears and deburr the gears without breakage.

Description

Technical Field

[0001] The present application relates to the technical field of powder metallurgy gear preparation, and particularly to a powder metallurgy parking brake gear preparation system and a preparation method thereof. Background Art

[0002] Powder metallurgy gears are difficult to be separately counted among all powder metallurgy parts. However, whether by weight or by the number of parts, the proportion of powder metallurgy gears in various machinery, automobiles, and motorcycles is much larger than that of powder metallurgy parts in other fields.

[0003] The manufacturing process of powder metallurgy gears mainly includes steps such as powder making, mixing, forming, sintering, and post-treatment, and finally completes the powder metallurgy gears.

[0004] Powder metallurgy gears have the advantages of low cost, high production efficiency, one-time forming, no waste during the gear forming process, and the best utilization of steel resources. Therefore, powder metallurgy gears are widely used.

[0005] In the prior art, such as the Chinese patent with the patent number CN210221053U, a powder metallurgy gear detection device is disclosed. The present invention belongs to the technical field of detection devices, including a workbench. One side of the upper surface of the workbench is fixedly provided with a support plate, the top of the support plate is fixedly provided with a mounting plate, a second hydraulic cylinder is installed at the middle position of the upper surface of the mounting plate, the output end of the second hydraulic cylinder is connected with a second hydraulic telescopic rod, the bottom end of the second hydraulic telescopic rod is connected with a mounting block, and an upper detection head is installed on the side of the mounting block away from the support plate. After placing the powder metallurgy gear to be tested on the shelving plate, the present invention controls the second hydraulic cylinder to drive the upper detection head to descend through a program. After the upper detection head touches the gear to be measured, the program automatically completes the detection of the flatness, parallelism, and thickness tolerance of the powder metallurgy gear, effectively reducing the detection cycle, improving the detection efficiency compared with the coordinate measuring machine, reducing the cost of the detection device, and increasing the revenue.

[0006] In the above prior art, during the gear preparation process, the gears cannot be effectively screened as needed. Therefore, it is necessary to manually perform secondary classification on the gears after detection.

[0007] Secondly, in the above technology, during the detection of the gears, the burrs on the gear surface cannot be processed, resulting in the need for secondary processing later, thereby reducing the efficiency of gear preparation.

[0008] Then, in the prior art, during the powder die-casting process of the gears, the gears need to be conveyed to the sintering area through a conveyor belt for sintering operations. At this time, the gears are in the most brittle state and are prone to damage near the contact with the conveyor belt during the conveyor belt transportation. Summary of the Invention

[0009] In order to achieve the efficient preparation of powder gears and ensure the quality of powder gears, the present application provides a powder metallurgy parking brake gear preparation system and a preparation method.

[0010] In the first aspect, a powder metallurgy parking brake gear preparation system provided by the present application adopts the following technical solutions:

[0011] A powder metallurgy parking brake gear preparation system includes a processing operation frame, a conveying device, and a gear detection device. Inside the processing operation frame, there is a conveying device for conveying powder metallurgy gears, and inside the processing operation frame, there is a gear detection device for detecting the powder metallurgy gears conveyed by the conveying device.

[0012] The gear detection device includes a screening mechanism arranged inside the processing operation frame for screening the quality of gears. The screening mechanism is arranged at the middle position of the conveying device, and on the lower left side of the conveying device, there is a secondary detection mechanism for performing refined detection on the gears that meet the requirements after screening.

[0013] Preferably, the conveying device includes three conveyor belts arranged inside the processing operation frame. Two of the conveyor belts are on the same straight line and are symmetrical to each other, and the other conveyor belt is located above the left conveyor belt of the processing operation frame. At both ends of the three conveyor belts, there are two conveying rollers for straightening the conveyor belts and driving the conveyor belts to move. The conveying rollers are rotatably installed on the inner wall of the processing operation frame, and the conveying rollers on the three conveyor belts are connected to a driving motor to drive the conveyor belts to rotate.

[0014] Clamping cylinders are fixedly arranged at equal intervals on the conveyor belt on the left side of the processing operation frame for clamping powder metallurgy gears.

[0015] Warning blocks are fixedly arranged at equal intervals on the conveyor belt on the left side of the processing operation frame.

[0016] Preferably, the screening mechanism includes a weighing plate horizontally and hingedly installed in the middle of the processing operation frame. A storage box is fixedly connected to the lower right end of the weighing plate, and several counterweight blocks of different weights can be placed in the storage box.

[0017] Two symmetrically arranged strip-shaped grooves are opened at the upper right end of the weighing plate. Guide columns are fixedly connected inside the strip-shaped grooves, and sliding blocks are slidably installed on the guide columns. A balance spring is sleeved on the guide column on the left side of the sliding block. A support frame is fixedly connected to the middle of the upper end of the weighing plate, and two symmetrically arranged support rods are hinged to the right side of the support frame. The end of the support rod away from the support frame is hinged to the sliding block.

[0018] Preferably, the secondary detection mechanism includes a limiting plate disposed inside the processing operation frame. The limiting plate is located below the left conveyor belt inside the processing operation frame and is fixed to the inner wall of the processing operation frame. A circular discharge hole is formed in the limiting plate. The lower end of the limiting plate is fixedly connected with an annular plate. The annular plate is a telescopic structure. The lower end of the annular plate is fixedly installed with an annular detection cylinder. The inner part of the annular detection cylinder is provided with upper and lower symmetric adjustment holes at equal intervals in the circumferential direction. Adjustment columns are slidably installed in the adjustment holes. One end of two upper and lower symmetric adjustment columns close to the inside of the annular detection cylinder is fixedly connected with a claw. An adjustment mechanism for adjusting the position of the claw is provided at the end of the adjustment column away from the claw. A fine adjustment mechanism is provided inside the annular detection cylinder, and a deburring mechanism is provided at the lower end of the annular detection cylinder.

[0019] Preferably, the fine adjustment mechanism includes a fine adjustment motor fixedly connected to the bottom of the processing operation frame. The output end of the fine adjustment motor faces upward and is connected with a first cross column. The first cross column rotatably penetrates through a horizontal plate fixed to the inner wall of the processing operation frame. The horizontal plate is located directly above the fine adjustment motor.

[0020] The upper end of the first cross column is slidably connected with a second cross column. A cross spring is connected between the second cross column and the first cross column. The top of the second cross column is fixedly connected with a cross limit block. The cross limit block is slidably installed on a fixed collar. A matching groove cooperating with the cross limit block is formed through the fixed collar. A hollow groove is formed in the middle of the matching groove. A fine adjustment spring is fixedly connected between the lower end of the fixed collar and the horizontal plate. The fine adjustment spring is sleeved on the first cross column and the second cross column. The upper end of the fixed collar is detachably connected with a fine adjustment circular plate. The elastic force of the fine adjustment spring is less than that of the cross spring.

[0021] A cross linkage column is fixed to the outer side of the lower end of the second cross column.

[0022] Preferably, the fine adjustment circular plate is of a hollow structure, and detection holes are formed at equal intervals at the upper end of the fine adjustment circular plate. Detection needles are slidably installed in the detection holes. A sealing groove is formed at a position close to the top of the detection needle. A right-angled trapezoidal block is slidably installed in the sealing groove. The inclined surface of the right-angled trapezoidal block faces downward. A support spring is connected between the left side of the right-angled trapezoidal block and the detection needle. An ink outlet hole is formed through the detection needle up and down. The lower end of the detection needle is connected to an inkjet pump through a hose. The inkjet pump is arranged inside the fine adjustment circular plate. A buffer spring rod is provided between the lower end of the detection needle and the fine adjustment circular plate.

[0023] Preferably, the adjusting mechanism includes a linkage plate slidably mounted on the side of two symmetrically arranged adjusting columns away from the annular detection cylinder, and nuts are installed on the adjusting columns by means of threaded connection to limit the linkage plate. An adjusting spring is sleeved between the linkage plate and the outer side wall of the annular detection cylinder. An annular airbag fixed on the annular detection cylinder is arranged between the inner side wall of the annular detection cylinder and the claw. A linkage airbag is connected to the annular airbag through a trachea, and the linkage airbag is arranged on the horizontal plate.

[0024] A push rod motor is fixed at the lower end of the limiting plate. The output end of the push rod motor is connected with a vertical rod. The vertical rod is of an L-shaped structure and slides at the lower end of the limiting plate. An activity groove corresponding to the vertical rod is formed on the annular plate, so that the vertical rod can move into the interior of the annular plate. A pressing plate is connected to the side of the vertical rod close to the push rod motor, and the pressing plate abuts against the side end of the linkage airbag.

[0025] Preferably, the deburring mechanism includes a driving pulley rotatably connected to the lower end of the horizontal plate. A linkage belt is sleeved on the driving pulley. A driven pulley is arranged at one end of the linkage belt away from the driving pulley. A reciprocating screw rod is fixed at the upper end of the driven pulley. A sliding block capable of sliding up and down is arranged on the reciprocating screw rod, and the sliding block is fixedly connected to the annular detection cylinder.

[0026] Preferably, a telescopic push rod is connected to the lower end of the horizontal plate. The output end of the telescopic push rod faces upward and is connected with an L-shaped block. An execution block corresponding to the L-shaped block is arranged on the outer side wall of the fixed sleeve.

[0027] In a second aspect, the present invention further provides a preparation method for a powder metallurgy parking brake gear, including the following steps:

[0028] S1. Gear preparation: First, various required raw materials are made into powder, and then after mixing, they are poured into a mold. Then, they are pressed to form a gear shape, and then sintering treatment is carried out in sequence to finally form.

[0029] S2. Gear detection: The prepared gear is conveyed to a weighing plate through a conveyor belt to detect its weight, and the gears that meet the standards and those that do not meet the standards are screened. At the same time, they are conveyed separately through the conveyor belt to avoid confusion.

[0030] S5. Secondary gear detection: After the gears that meet the requirements are conveyed to the gear detection device, the gears are detected to determine whether there are defects in the claws of the gears.

[0031] S4. Gear processing: After the gears are subjected to secondary detection, the edges of each tooth of the gears are polished through a deburring mechanism to avoid a large number of burrs on the gears.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. The present invention can screen gears through a screening mechanism, weigh the prepared gears, and classify and convey gears with a weight greater than or equal to the weight of a standard gear and gears with a weight less than the standard weight, effectively realizing the screening of gears and avoiding manual screening, thereby indirectly improving the efficiency of gear preparation.

[0034] 2. The present invention can conduct secondary detection on the gears screened by the screening mechanism that meet the requirements, detect the bottom of the gears, and mark them if there are damages around the bottom of the gears, facilitating subsequent collection.

[0035] 3. The present invention can deburr the gears while detecting them, and polish the tooth gaps of the gears through the cooperation of tooth claws and the gears, thereby achieving the purpose of deburring.

[0036] 4. The present invention can separate the tooth claws by disassembly, thereby measuring and polishing gears with different numbers of teeth as needed, greatly improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of the main structure of the present invention.

[0038] Figure 2 is a schematic diagram of the main structure of the screening mechanism of the present invention from the first perspective.

[0039] Figure 3 is a schematic diagram of the main structure of the screening mechanism of the present invention from the second perspective.

[0040] Figure 4 is a partial structure schematic diagram of the secondary detection mechanism of the present invention.

[0041] Figure 5 is the present invention Figure 4 partial enlarged view at A.

[0042] Figure 6 is a schematic diagram of the annular detection cylinder and its internal structure of the present invention.

[0043] Figure 7 is a partial structure schematic diagram of the fine-tuning mechanism of the present invention.

[0044] Figure 8 is a schematic diagram of the fine-tuning circular plate and other structures of the present invention.

[0045] Figure 9 is a schematic diagram of the internal structure of the fine-tuning circular plate of the present invention.

[0046] Figure 10 It is a schematic structural diagram inside the detection needle in the present invention.

[0047] Figure 11 It is a partial structural schematic diagram of the adjustment mechanism in the present invention.

[0048] Figure 12 It is the present invention Figure 11 A partial enlarged view at position B in the present invention.

[0049] Figure 13 It is a partial structural schematic diagram of the deburring mechanism in the present invention.

[0050] Figure 14 It is Figure 13 A partial enlarged view at position C in the present invention.

[0051] Figure 15 It is a structural schematic diagram of the preparation method of the powder metallurgy parking brake gear in the present invention.

[0052] Explanation of reference numerals: 1, processing operation frame; 2, conveying device; 3, gear detection device; 4, screening mechanism; 5, secondary detection mechanism; 20, conveyor belt; 21, conveying roller; 23, driving motor; 24, clamping cylinder; 25, warning block; 40, weighing plate; 41, storage box; 42, guiding column; 43, sliding block; 44, balancing spring; 45, support frame; 46, support rod; 50, limiting plate; 51, annular plate; 52, annular detection cylinder; 53, adjusting column; 54, tooth claw; 55, adjustment mechanism; 56, fine adjustment mechanism; 58, deburring mechanism; 560, fine adjustment motor; 561, first cross column; 569, second cross column; 562, horizontal plate; 563, cross limiting block; 564, fixed collar; 565, hollow groove; 566, fine adjustment spring; 567, fine adjustment circular plate; 570, cross spring; 600, detection needle; 601, right-angled trapezoidal block; 602, support spring; 603, inkjet pump; 604, buffer spring rod; 550, linkage plate; 551, adjustment spring; 552, annular airbag; 553, linkage airbag; 554, nut; 555, electric push rod; 556, vertical rod; 557, extrusion plate; 580, driving pulley; 581, linkage belt; 582, driven pulley; 583, reciprocating screw; 584, sliding block; 585, cross linkage column; 590, telescopic push rod; 591, L-shaped block; 592, execution block. Detailed implementation manners

[0053] The following further describes the present application in detail with reference to the attached Figure 1 - 15 drawings.

[0054] The embodiments of the present application disclose a preparation system and a preparation method for a powder metallurgy parking brake gear. The present application can detect the powder metallurgy parking brake gear after pressing and forming, ensuring that the part of the bottom of the powder metallurgy gear in contact with the conveying device 2 during transportation does not have defects at the bottom due to friction and impact. Through a series of detections, the integrity of the gear is determined. While detecting it, the present invention can deburr the gears that meet the standards after preparation, avoiding manual secondary processing, thereby improving the efficiency of preparing powder metallurgy parking brake gears.

[0055] Embodiment 1:

[0056] Refer to Figure 1 As shown in the figure, a preparation system for a powder metallurgy parking brake gear includes a processing work frame 1, a conveying device 2, and a gear detection device 3. Inside the processing work frame 1, there is a conveying device 2 for conveying the powder metallurgy gear, and inside the processing work frame 1, there is a gear detection device 3 for detecting the powder metallurgy gear conveyed by the conveying device 2. First, the conveying device 2 conveys the powder metallurgy gear that has been sintered and cooled at equal intervals, ensuring that the powder metallurgy gear can be batch-detected and improving the detection efficiency. Moreover, during the conveying process of the powder metallurgy gear, it is detected by the gear detection device 3, and the gears that have been prepared and meet the standards without damage are screened, ensuring the rapid differentiation of gears in the entire powder metallurgy gear production line and avoiding affecting the gear preparation efficiency.

[0057] Refer to Figure 2 As shown in the figure, the gear detection device 3 includes a screening mechanism 4 provided inside the processing work frame 1 for screening the quality of the powder metallurgy gear. The screening mechanism 4 is arranged at the middle position of the conveying device 2, and at the lower left side of the conveying device 2, there is a secondary detection mechanism 5 for performing refined detection on the powder metallurgy gear that meets the requirements after screening. The function of the screening mechanism 4 is to distinguish the powder metallurgy gear without defects after preparation from the damaged powder metallurgy gear and convey them classified. The function of the secondary detection mechanism 5 is to perform secondary detection on the intact powder metallurgy gear screened by the screening mechanism 4 to detect whether the bottom surface in contact with the conveyor belt 20 is damaged.

[0058] Refer to Figure 3As shown, after the powder metallurgy gear is prepared, it has not completed all the steps. The powder metallurgy gear needs to be subjected to various tests. Among them, the conveying device 2 is required to undertake the task of conveying the powder metallurgy gear. Specifically, the conveying device 2 includes three conveyor belts 20 arranged inside the processing operation frame 1. Two of the conveyor belts 20 are on the same straight line and are symmetrical to each other, and the other conveyor belt 20 is located above the left conveyor belt 20 of the processing operation frame 1. Among the three conveyor belts 20, the conveyor belt 20 located in the upper left position of the processing operation frame 1 is used to convey the powder metallurgy gears placed at equal intervals, while the other two conveyor belts 20 are respectively used to convey the intact powder metallurgy gears and the defective powder metallurgy gears screened out by the screening mechanism 4, thereby improving the overall preparation efficiency.

[0059] It should be noted that when the powder metallurgy gear is placed on the conveyor belt 20 on the upper left side of the processing operation frame 1, attention should be paid to the position of the powder metallurgy gear so that the powder metallurgy gear is always on the right side of the warning blocks 25 arranged at equal intervals on the conveyor belt 20, preparing for the subsequent screening of the powder metallurgy gear.

[0060] Two conveying rollers 21 for straightening and moving the conveyor belt 20 are provided at both ends of the three conveyor belts 20. The conveying rollers 21 are rotatably installed on the inner wall of the processing operation frame 1, and a driving motor 23 is connected to the conveying rollers 21 on the three conveyor belts 20 to drive the conveyor belt 20 to rotate. Specifically, the conveyor belt 20 located in the upper left position inside the processing operation frame 1 rotates clockwise, while the other two conveyor belts 20 rotate in opposite directions. The conveyor belt 20 located on the left side inside the processing operation frame 1 rotates counterclockwise, and the conveyor belt 20 located on the right side inside the processing operation frame 1 rotates clockwise.

[0061] Clamping cylinders 24 are fixedly arranged at equal intervals on the conveyor belt 20 on the left side of the processing operation frame 1 for clamping the powder metallurgy gear. After the intact powder metallurgy gear is detected by the screening mechanism 4, the intact powder metallurgy gear enters the conveyor belt 20 on the left side of the processing operation frame 1. Subsequently, the clamping cylinder 24 at the upper end of the conveyor belt 20 clamps it until it is conveyed to the designated position, and then the intact powder metallurgy gear is released and enters the secondary detection mechanism 5 for detection.

[0062] Warning blocks 25 are fixedly arranged at equal intervals on the conveyor belt 20 on the left side of the processing operation frame 1. The function of the warning blocks 25 is to press the weighing plate 40 in the screening mechanism 4. After the weighing plate 40 detects one gear each time, it presses the left side of the weighing plate 40 to make the weighing plate 40 tilt to the left, preventing the detected powder metallurgy gear from staying on the weighing plate 40 and causing problems in subsequent detections.

[0063] Look again Figure 3As shown, the screening mechanism 4 includes a weighing plate 40 horizontally and hingedly installed in the middle of the processing operation frame 1. A storage box 41 is fixedly connected to the lower right end of the weighing plate 40, and a number of counterweight blocks of different weights can be placed in the storage box 41.

[0064] In the specific implementation process, before the weighing plate 40 detects the gear, the counterweight blocks placed as required are pre-placed in the storage box 41 on its right side. The weight of the counterweight blocks is the same as that of a normal and intact powder metallurgy gear after multiple tests. At this time, the weight of the right half of the center line of the weighing plate 40 is larger, and the weighing plate 40 tilts to the right, but the left side of the weighing plate 40 is at the same height as the conveyor belt 20 on the upper left side inside the processing operation frame 1.

[0065] In the specific preparation process, the conveyor belt 20 conveys the gear to the left side part of the center line of the weighing plate 40. If the weight of the gear is greater than the weight of the counterweight blocks, the weighing plate 40 that tilts to the right at this time starts to tilt to the left, and then the gear slides along the weighing plate 40 to the left side and falls onto the conveyor belt 20 on the left side inside the processing operation frame 1 for subsequent secondary detection.

[0066] When the weight of the gear is less than the weight of the counterweight blocks, the weighing plate 40 that tilts to the right at this time always remains tilted to the right, and then the gear gradually slides along the weighing plate 40 to the right side and falls onto the conveyor belt 20 on the right side inside the processing operation frame 1.

[0067] When the weight of the gear is equal to the weight of the counterweight blocks, the weighing plate 40 is in a balanced state. At this time, the gear cannot fall. When detecting the weight of the gear, the conveyor belt 20 at the upper left end of the processing operation frame 1 always rotates at a constant speed. Therefore, when the weighing plate 40 is in a balanced state, the warning block 25 at the upper left end of the processing operation frame 1 will squeeze the weighing plate 40, causing the gear on the weighing plate 40 to slide onto the conveyor belt 20 on the left side of the processing operation frame 1, and the weighing plate 40 tilts to the left, preventing the powder metallurgy gear that has been detected from staying on the weighing plate 40.

[0068] Looking back Figure 3 As shown, two symmetrically arranged strip-shaped grooves are opened at the upper right end of the weighing plate 40. A guiding column 42 is fixedly connected in the strip-shaped groove. A sliding block 43 is slidably installed on the guiding column 42. A balancing spring 44 is sleeved on the guiding column 42 on the left side part of the sliding block 43. A support frame 45 is fixedly connected to the middle of the upper end of the weighing plate 40. Two symmetrically arranged front and rear support rods 46 are hinged to the right side of the support frame 45. One end of the support rod 46 far from the support frame 45 is hinged to the sliding block 43; the length of the support rod 46 is fixed, and the support rod 46 and the sliding block 43 slide along the strip-shaped groove. Therefore, the support rod 46 can limit the tilting angle of the weighing plate 40 to the left and right sides, so that the weighing plate 40 can only tilt within a certain range, avoiding the tilting angle of the weighing plate 40 from being too large.

[0069] Refer to Figure 4 、 Figure 5 and Figure 6 As shown, after the intact powder metallurgy gear enters the conveyor belt 20 on the left side of the processing operation frame 1, it is clamped and fixed by the clamping cylinder 24 to prevent the gear from falling off the conveyor belt 20, and then it is subjected to secondary detection; specifically, the secondary detection mechanism 5 includes a limiting plate 50 arranged inside the processing operation frame 1. The limiting plate 50 is located below the conveyor belt 20 on the left side inside the processing operation frame 1 and is fixed on the inner wall of the processing operation frame 1. A circular discharge hole is provided on the limiting plate 50; after the gear moves to directly above the circular discharge hole on the limiting plate 50 through the conveyor belt 20, the clamping cylinder 24 releases the powder metallurgy gear, so that the powder metallurgy gear enters the annular plate 51 through the limiting plate 50 and is processed.

[0070] The lower end of the limiting plate 50 is fixedly connected to an annular plate 51. The annular plate 51 is a telescopic structure. An annular detection cylinder 52 is fixedly installed at the lower end of the annular plate 51. Adjusting holes that are symmetrically arranged up and down in the circumferential direction are provided inside the annular detection cylinder 52. Adjusting columns 53 are slidably installed in the adjusting holes. One ends of two symmetrically arranged adjusting columns 53 close to the inside of the annular detection cylinder 52 are fixedly connected to claw teeth 54. An adjusting mechanism 55 for adjusting the position of the claw teeth 54 is provided at the end of the adjusting column 53 away from the claw teeth 54. A fine-tuning mechanism 56 is provided inside the annular detection cylinder 52, and a deburring mechanism 58 is provided at the lower end of the annular detection cylinder 52.

[0071] In the specific implementation process, when the gear passes through the circular discharge hole of the limiting plate 50, it enters the annular detection cylinder 52 through the telescopic annular plate 51 until the powder metallurgy gear abuts against the upper end of the claw teeth 54 inside the annular detection cylinder 52. Because the gaps between the teeth of the powder metallurgy gear and the claw teeth 54 cannot coincide at one time, the gear will abut against the upper end of the claw teeth 54 after falling. At this time, the gear cannot move. Then, the angle of the gear is finely adjusted through the fine-tuning mechanism 56. While the gear is being finely adjusted, the bottom of the gear is detected to check whether there is damage at the bottom of the gear.

[0072] Refer to Figure 7 、 Figure 8 and Figure 9 As shown, when the gear enters the inside of the annular detection cylinder 52, the gear abuts against the upper end of the claw teeth 54. At this time, the bottom of the gear can be detected. The purpose of detecting the bottom of the gear is that during the pressing process of the gear, the bottom of the gear contacts the conveyor belt 20, and during the conveying process of the gear on the conveyor belt 20, it is most likely to cause damage around the bottom of the gear during the alternation of the conveyor belts 20. Therefore, it is necessary to detect the bottom of the powder metallurgy gear to determine whether there is any defect.

[0073] The fine-tuning circular plate 567 is of a hollow structure, and detection holes are evenly arranged at the upper end of the fine-tuning circular plate 567. Detection needles 600 are slidably installed in the detection holes. A sealing groove is provided at a position near the top of the detection needle 600. A right-angled trapezoidal block 601 is slidably installed in the sealing groove. The inclined surface of the right-angled trapezoidal block 601 faces downward. A support spring 602 is connected between the left side of the right-angled trapezoidal block 601 and the detection needle 600. An ink outlet hole is vertically penetrated through the detection needle 600. The lower end of the detection needle 600 is connected to an inkjet pump 603 through a hose. The inkjet pump 603 is arranged inside the fine-tuning circular plate 567. A buffer spring rod 604 is provided between the lower end of the detection needle 600 and the fine-tuning circular plate 567.

[0074] In the specific implementation process, after the powder metallurgy gear abuts against the upper end of the tooth claw 54, the fine-tuning circular plate 567 can be fine-tuned to be higher than the top of the tooth claw 54 in the initial state through the elastic forces of the first cross column 561, the second cross column 569, and the fine-tuning spring 566. At this time, the fine-tuning circular plate 567 protrudes higher than the tooth claw 54. When the powder metallurgy gear falls to the annular detection cylinder 52, the weight of the powder metallurgy gear is greater than the elastic force of the fine-tuning spring 566. Therefore, the fine-tuning circular plate 567 is pressed downward, causing the fine-tuning circular plate 567 to abut against the bottom of the gear.

[0075] The detection needles 600 at the upper end of the fine-tuning circular plate 567 are compressed. At this time, the inkjet pump 603 starts to work to provide quick-drying ink liquid outward.

[0076] Refer to Figure 10 As shown, the sealing grooves at the upper ends of the detection needles 600 that are not fully pressed down are not fully sealed at this time and are in an open state. Therefore, the ink liquid ejected by the inkjet pump 603 sprays outward along the detection needles 600 and sprays the ink liquid on the bottom of the powder metallurgy gear, thereby marking the damaged positions on the powder metallurgy gear.

[0077] Refer to Figure 11 As shown, after the bottom of the gear is detected, the position of the gear needs to be adjusted so that the gear enters between several tooth claws 54. Specifically, the fine-tuning mechanism 56 includes a fine-tuning motor 560 fixedly connected to the bottom of the processing operation frame 1. The output end of the fine-tuning motor 560 faces upward and is connected to a first cross column 561. The first cross column 561 rotatably penetrates a horizontal plate 562 fixed on the inner wall of the processing operation frame 1. The horizontal plate 562 is located directly above the fine-tuning motor 560.

[0078] In the specific implementation process, the fine-tuning motor 560 starts. The fine-tuning motor 560 drives the fixed collar 564 to rotate through the first cross column 561, the second cross column 569, and the cross limit block 563. During the rotation of the fixed collar 564, the fine-tuning circular plate 567 fixed to its upper end rotates. At this time, the detection needle 600 at the upper end of the fine-tuning circular plate 567 rubs against the bottom of the powder metallurgy gear, causing the powder metallurgy gear to rotate. Until the gap between the teeth of the powder metallurgy gear coincides with the gap between several tooth claws 54, the powder metallurgy gear moves downward, and the powder metallurgy gear enters between several tooth claws 54. At this time, the fine-tuning at the lower end of the fixed collar 564 continues to be compressed downward by a certain distance by the gravity of the gear. Subsequently, the fine-tuning circular plate 567 stops moving, and the gear on the fine-tuning ring is located between several tooth claws 54.

[0079] The upper end of the first cross column 561 is slidably connected to the second cross column 569. A cross spring 570 is connected between the second cross column 569 and the first cross column 561. The top of the second cross column 569 is fixedly connected to a cross limit block 563. In the initial state, the second cross column 569 slides up and down and is sleeved on the first cross column 561, and the second cross column 569 is supported by the cross spring 570 arranged between the two, so that the second cross column 569 extends out a certain length.

[0080] It should be noted that the elastic force of the cross spring 570 is greater than the elastic force of the fine-tuning spring 566, and the elastic force of the fine-tuning spring 566 can be compressed by the powder metallurgy gear within a certain distance.

[0081] Refer to Figure 12 As shown, the cross limit block 563 is slidably installed on the fixed collar 564. A mating groove that cooperates with the cross limit block 563 is penetrated and opened on the fixed collar 564. A hollow groove 565 is opened in the middle of the mating groove. A fine-tuning spring 566 is fixedly connected between the lower end of the fixed collar 564 and the horizontal plate 562. In the initial state, the cross limit block 563 is located in the mating groove of the fixed collar 564. The fine-tuning motor 560 can drive the fixed collar 564 and the fine-tuning circular plate 567 to rotate through the cross limit block 563. When the gear is adjusted to the right angle and falls downward, the gear squeezes the fixed collar 564, causing the cross limit block 563 to enter the hollow groove 565 of the fixed collar 564. At this time, the cross limit block 563 is separated from the fixed collar 564, and the fine-tuning motor 560 cannot drive the fine-tuning circular plate 567 to rotate, and the fine-tuning circular plate 567 only supports the gear.

[0082] The fine-tuning spring 566 is sleeved on the first cross column 561 and the second cross column 569. The upper end of the fixed collar 564 is connected to the fine-tuning circular plate 567 in a detachable manner, and the fine-tuning circular plate 567 can be replaced by detaching it, so as to realize the detection of different powder metallurgy gears.

[0083] Embodiment 2: On the basis of Embodiment 1, in order to further improve the preparation efficiency of the powder metallurgy gear, the present invention further provides a deburring mechanism 58. The deburring mechanism 58 polishes the tooth gaps of the powder metallurgy gear to avoid a large amount of burrs between multiple tooth gaps of the gear, resulting in quality problems.

[0084] Looking back Figure 11 and Figure 12 As shown, the adjusting mechanism 55 includes a linkage plate 550 slidably installed on the side of the two symmetrically arranged adjusting columns 53 away from the annular detection cylinder 52. A nut 554 is installed on the adjusting column 53 by means of threading. The nut 554 limits the linkage plate 550. An adjusting spring 551 is sleeved between the adjusting column 53 and the outer side wall of the annular detection cylinder 52. The tooth claws 54 are slidably arranged on the annular detection cylinder 52 through the adjusting columns 53, and the tooth claws 54 are supported by the adjusting springs 551 to ensure that the tooth claws 54 can move within a certain range.

[0085] The adjusting mechanism 55 in the present invention can detect gears of various different sizes. Therefore, the tooth claws 54 on the annular detection cylinder 52 can be disassembled. When the existing detected gear has 23 teeth and the subsequent prepared gear has 17 teeth, first separate the nut 554 from the adjusting column 53, and then remove the linkage plate 550 from the adjusting column 53. At this time, the adjusting column 53 and the tooth claws 54 can be taken out. Then, the tooth claws 54 fixedly connected with the adjusting column 53 are reinstalled on the annular detection cylinder 52 at equal intervals as required, and the linkage plate 550 and the nut 554 are installed on the adjusting column 53 in sequence, thereby realizing the fixation of the tooth claws 54.

[0086] An annular airbag 552 fixed on the annular detection cylinder 52 is arranged between the inner side wall of the annular detection cylinder 52 and the tooth claws 54. The annular airbag 552 is connected with a linkage airbag 553 through a trachea, and the linkage airbag 553 is arranged on the horizontal plate 562.

[0087] An electric push rod 555 is fixed at the lower end of the limiting plate 50. The output end of the electric push rod 555 is connected with a vertical rod 556. The vertical rod 556 is of an L-shaped structure. The vertical rod 556 slides at the lower end of the limiting plate 50. An activity groove corresponding to the vertical rod 556 is opened on the annular plate 51, so that the vertical rod 556 can move into the interior of the annular plate 51. A pressing plate 557 is connected to the side of the vertical rod 556 close to the electric push rod 555, and the pressing plate 557 abuts against the side end of the linkage airbag 553.

[0088] In the specific implementation process, after the gear drops and enters between several tooth claws 54, the electric push rod 555 is activated. The electric push rod 555 pushes the vertical rod 556 to move into the interior of the annular plate 51. After the vertical rod 556 enters the interior of the annular plate 51, the lower end of the gear is supported by the fine-tuning circular plate 567, and the upper end of the gear is limited by the vertical rod 556 to prevent the gear from moving up and down. While the gear is limited up and down, the pressing plate 557 on the electric push rod 555 squeezes the linkage airbag 553. The gas inside the linkage airbag 553 enters the annular airbag 552 through the air pipe and fills the annular airbag 552. During the process of the annular airbag 552 expanding in volume, the annular airbag 552 squeezes the tooth claws 54, causing the tooth claws 54 to abut against the side wall of the gear, enabling the tooth claws 54 to fit into the tooth gaps of the gear, facilitating subsequent deburring and burr removal.

[0089] Refer to Figure 13 and Figure 14 As shown, the deburring mechanism 58 includes a driving pulley 580 rotatably connected to the lower end of the horizontal plate 562. A linkage belt 581 is sleeved on the driving pulley 580. One end of the linkage belt 581 away from the driving pulley 580 is provided with a driven pulley 582. A reciprocating screw rod 583 is fixed to the upper end of the driven pulley 582. A sliding block 584 that can slide up and down is provided on the reciprocating screw rod 583. The sliding block 584 is fixedly connected to the annular detection cylinder 52.

[0090] A cross linkage column 585 is fixedly provided on the outer side of the lower end of the second cross column 569.

[0091] The lower end of the horizontal plate 562 is connected with a telescopic push rod 590. The output end of the telescopic push rod 590 faces upward and is connected with an L-shaped block 591. An execution block 592 corresponding to the L-shaped block 591 is provided on the outer side wall of the fixed sleeve.

[0092] In the specific implementation process, after the tooth claws 54 abut against the gaps on the side wall of the gear, the telescopic push rod 590 is activated. The telescopic push rod 590 drives the L-shaped block 591 to abut against the execution block 592. Through the execution block 592, the fixed sleeve is pulled downward until the fixed sleeve drives the second cross column 569 to move downward, causing the cross linkage column 585 to insert into the groove in the middle of the driving pulley 580 that cooperates with the cross linkage column 585. At this time, the fine-tuning motor 560 rotates. The fine-tuning motor 560 drives the driving pulley 580 to rotate. During the rotation of the driving pulley 580, the driven pulley 582 is driven to rotate through the linkage belt 581. The driven pulley 582 drives the sliding block 584 at its upper end to reciprocate up and down through the reciprocating screw rod 583. The sliding block 584 drives the annular detection cylinder 52 to move up and down, so that the tooth claws 54 in the annular detection cylinder 52 polish the gear, thereby achieving the purpose of gear deburring and improving the efficiency of gear preparation.

[0093] Refer to Figure 15 As shown, in addition, the present invention also provides a method for preparing a powder metallurgy parking brake gear, comprising the following steps:

[0094] S1. Gear preparation: First, various required raw materials are made into powders, then they are mixed and poured into a mold, and then pressed to make them in the shape of a gear. Then, sintering treatment is carried out on them in sequence to make the final forming.

[0095] S2. Gear detection: The prepared gear is conveyed to the weighing plate 40 through the conveyor belt 20, and its weight is detected. The gears with a weight greater than or equal to the standard powder metallurgy gear are screened onto the conveyor belt 20 on the left side of the processing work frame, while the gears with a weight less than the standard powder metallurgy gear are screened onto the conveyor belt 20 on the right side of the processing work frame, and they are distinguished and conveyed to avoid confusion.

[0096] S5. Secondary gear detection: After the qualified powder metallurgy gears are conveyed to the gear detection device 3, the bottom of the powder metallurgy gears is detected. The detection needle 600 on the fine-tuning circular plate 567 is used to detect the bottom of the powder metallurgy gears to detect whether there are defects at the bottom of the powder metallurgy gears.

[0097] S4. Gear processing: After the gears complete the secondary detection, the gear claws 54 are abutted against multiple tooth gaps of the powder metallurgy gears, and they are polished by the way of reciprocating friction up and down, so as to achieve the purpose of deburring. At the same time, the number of the gear claws 54 can be disassembled, so as to realize the processing of powder metallurgy gears with different numbers of teeth.

[0098] The embodiments of the specific implementation manners are all the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A powder metallurgy parking brake gear preparation system, comprising a processing operation frame (1), a conveying device (2) and a gear detection device (3). The conveying device (2) for conveying powder metallurgy gears is arranged inside the processing operation frame (1), and the gear detection device (3) for detecting the powder metallurgy gears conveyed by the conveying device (2) is arranged inside the processing operation frame (1). It is characterized in that: The gear detection device (3) includes a screening mechanism (4) arranged inside the processing operation frame (1) for screening the quality of gears. The screening mechanism (4) is arranged at the middle position of the conveying device (2), and a secondary detection mechanism (5) for finely detecting the gears that meet the requirements after screening is arranged at the lower left side of the conveying device (2); The secondary detection mechanism (5) includes a limiting plate (50) arranged inside the processing operation frame (1). The limiting plate (50) is located below the left conveyor belt (20) inside the processing operation frame (1) and is fixed on the inner wall of the processing operation frame (1). A circular discharge hole is opened on the limiting plate (50). The lower end of the limiting plate (50) is fixedly connected with an annular plate (51). The annular plate (51) is a telescopic structure. The lower end of the annular plate (51) is fixedly installed with an annular detection cylinder (52). The inner part of the annular detection cylinder (52) is provided with upper and lower symmetric adjustment holes at equal intervals in the circumferential direction. Adjustment columns (53) are slidably installed in the adjustment holes. The ends of two upper and lower symmetric adjustment columns (53) close to the inside of the annular detection cylinder (52) are fixedly connected with tooth claws (54). An adjustment mechanism (55) for adjusting the position of the tooth claws (54) is arranged at the end of the adjustment column (53) far away from the tooth claws (54). A fine adjustment mechanism (56) is arranged inside the annular detection cylinder (52), and a deburring mechanism (58) is arranged at the lower end of the annular detection cylinder (52); The fine adjustment mechanism (56) includes a fine adjustment motor (560) fixedly connected to the bottom of the processing operation frame (1). The output end of the fine adjustment motor (560) faces upward and is connected with a first cross column (561). The first cross column (561) rotates through a horizontal plate (562) fixed on the inner wall of the processing operation frame (1). The horizontal plate (562) is located directly above the fine adjustment motor (560); The upper end of the first cross column (561) is slidably connected with a second cross column (569). A cross spring (570) is connected between the second cross column (569) and the first cross column (561). The top of the second cross column (569) is fixedly connected with a cross limit block (563). The cross limit block (563) is slidably installed on a fixed collar (564). A mating groove that cooperates with the cross limit block (563) is penetrated and opened on the fixed collar (564). A hollow groove (565) is opened in the middle of the mating groove. A fine-tuning spring (566) is fixedly connected between the lower end of the fixed collar (564) and a horizontal plate (562). The fine-tuning spring (566) is sleeved on the first cross column (561) and the second cross column (569). The upper end of the fixed collar (564) is connected with a fine-tuning circular plate (567) in a detachable manner. The elastic force of the fine-tuning spring (566) is less than that of the cross spring (570); A cross linkage column (585) is fixed on the outer side of the lower end of the second cross column (569).

2. The powder metallurgy parking brake gear preparation system according to claim 1, wherein: The conveying device (2) includes three conveyor belts (20) arranged inside the processing work frame (1). Two of the conveyor belts (20) are on the same straight line and are symmetric with each other. The other conveyor belt (20) is located above the left conveyor belt (20) of the processing work frame (1). Two conveying rollers (21) for straightening the conveyor belt (20) and driving the conveyor belt (20) to move are provided at both ends of the three conveyor belts (20). The conveying rollers (21) are rotatably installed on the inner wall of the processing work frame (1). And a driving motor (23) is connected to the conveying rollers (21) on the three conveyor belts (20) to drive the conveyor belt (20) to rotate; Clamping cylinders (24) are fixedly arranged at equal intervals on the conveyor belt (20) on the left side of the processing work frame (1) for clamping powder metallurgy gears; Warning blocks (25) are fixedly arranged at equal intervals on the conveyor belt (20) on the left side of the processing work frame (1).

3. The powder metallurgy parking brake gear preparation system according to claim 1, wherein: The screening mechanism (4) includes a weighing plate (40) horizontally and hingedly installed in the middle of the processing work frame (1). A storage box (41) is fixedly connected to the lower right end of the weighing plate (40). A number of counterweight blocks of different weights can be placed in the storage box (41); Two symmetrically arranged strip-shaped grooves are opened at the upper right end of the weighing plate (40). Guide columns (42) are fixedly connected in the strip-shaped grooves. A sliding block (43) is slidably installed on the guide columns (42). A balance spring (44) is sleeved on the guide columns (42) at the left side part of the sliding block (43). A support frame (45) is fixedly connected to the middle of the upper end of the weighing plate (40). Two symmetrically arranged front and rear support rods (46) are hinged to the right side of the support frame (45). One end of the support rod (46) away from the support frame (45) is hinged to the sliding block (43).

4. A powder metallurgy parking brake gear preparation system according to claim 1, characterized in that: The fine-tuning circular plate (567) has a hollow structure, and detection holes are equidistantly formed at the upper end of the fine-tuning circular plate (567). A detection needle (600) is slidably installed in the detection holes. A sealing groove is formed at a position near the top of the detection needle (600). A right-angled trapezoidal block (601) is slidably installed in the sealing groove. The inclined surface of the right-angled trapezoidal block (601) faces downward. A support spring (602) is connected between the left side of the right-angled trapezoidal block (601) and the detection needle (600). An ink outlet hole is vertically formed through the detection needle (600). The lower end of the detection needle (600) is connected to an inkjet pump (603) through a hose. The inkjet pump (603) is arranged in the fine-tuning circular plate (567). A buffer spring rod (604) is provided between the lower end of the detection needle (600) and the fine-tuning circular plate (567).

5. A powder metallurgy parking brake gear preparation system according to claim 1, characterized in that: The adjusting mechanism (55) includes a linkage plate (550) slidably installed on the side of two symmetrically arranged adjusting columns (53) away from the annular detection cylinder (52) up and down. Nuts (554) are installed on the adjusting columns (53) by means of threaded connection. The linkage plate (550) is limited by the nuts (554). An adjusting spring (551) is sleeved between the linkage plate (550) and the outer side wall of the annular detection cylinder (52). An annular airbag (552) fixed on the annular detection cylinder (52) is provided between the inner side wall of the annular detection cylinder (52) and the claw (54). A linkage airbag (553) is connected to the annular airbag (552) through a trachea. The linkage airbag (553) is arranged on the horizontal plate (562); An electric push rod (555) is fixed at the lower end of the limiting plate (50). A vertical rod (556) is connected to the output end of the electric push rod (555). The vertical rod (556) has an L-shaped structure. The vertical rod (556) slides at the lower end of the limiting plate (50). An activity groove corresponding to the vertical rod (556) is formed on the annular plate (51), so that the vertical rod (556) can move into the interior of the annular plate (51). An extrusion plate (557) is connected to the side of the vertical rod (556) close to the electric push rod (555). The extrusion plate (557) abuts against the side end of the linkage airbag (553).

6. The powder metallurgy parking brake gear preparation system according to claim 1, wherein: The deburring mechanism (58) includes a driving pulley (580) rotatably connected to the lower end of the horizontal plate (562). A linkage belt (581) is sleeved on the driving pulley (580). A driven pulley (582) is provided at one end of the linkage belt (581) away from the driving pulley (580). A reciprocating screw rod (583) is fixed to the upper end of the driven pulley (582). A sliding block (584) capable of sliding up and down is provided on the reciprocating screw rod (583). The sliding block (584) is fixedly connected to the annular detection cylinder (52).

7. A powder metallurgy parking brake gear preparation system according to claim 1, characterized in that: The lower end of the horizontal plate (562) is connected with a telescopic push rod (590). The output end of the telescopic push rod (590) faces upward and is connected with an L-shaped block (591). An execution block (592) corresponding to the L-shaped block (591) is provided on the outer side wall of the fixed sleeve.

8. A preparation method of a powder metallurgy parking brake gear, according to the powder metallurgy parking brake gear preparation system described in any one of claims 1-7, characterized in that: Including the following steps: S1. Gear preparation: First, various required raw materials are made into powder, then they are mixed and poured into a mold, and then pressed to make it in the shape of a gear. Then, sintering treatment is carried out on it in sequence to achieve the final forming. S2. Gear detection: The gears after preparation are conveyed to the weighing plate (40) through the conveyor belt (20), their weights are detected, and the gears that meet the standards and those that do not meet the standards are screened. At the same time, they are conveyed separately through the conveyor belt (20) to avoid confusion. S5. Secondary gear detection: After the gears that meet the requirements are conveyed to the gear detection device (3), the gears are detected to determine whether there are any defects in the tooth claws (54) of the gears. S4. Gear processing: After the gears complete the secondary detection, the edges of each tooth of the gears are polished by the deburring mechanism (58) to avoid a large number of burrs on the gears.

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