Automatic placing and conveying mechanism for double-sided chamfering of powder metallurgy bearing

Abstract

The automatic placing and conveying mechanism comprises a first screening groove, a second screening groove and a connecting groove, the first screening groove is provided with a baffle, and the second screening groove is provided with an inclined bottom plate and a stop block. When the powder metallurgy bearings are conveyed to the first screening groove and the second screening groove from the conveying groove of the vibration rotating disc, the bearings with the placing postures not meeting the requirement fall off from the side, and only the bearings with the center shafts perpendicular and the chamfered faces facing downwards are conveyed to a stamping die to be further chamfered. The powder metallurgy bearing placing posture automatic control device is simple and ingenious in structure and convenient to maintain and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder metallurgy bearing manufacturing, and relates to an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings. Background Art

[0002] Oil-retaining bearings, also known as porous bearings, are primarily made from metal powder. Oil-retaining bearings are sintered bodies manufactured using powder metallurgy. Utilizing the sintered body's porosity, they are impregnated with 10% to 40% (volume fraction) of lubricating oil, allowing them to operate in a self-lubricating state. Oil-retaining bearings offer low cost, vibration absorption, low noise, and the ability to operate for extended periods without requiring lubrication. They are particularly well-suited for environments where lubrication is difficult or where oil contamination is unacceptable. They have found widespread application and have become an essential component for a wide range of industrial products, including automobiles, home appliances, audio equipment, office equipment, agricultural machinery, and precision machinery.

[0003] Typically, powder metallurgy bearings requiring chamfering are transported individually via a conveyor belt using a vibrating turntable to a chamfering die. The bearings are then chamfered and dimensionally adjusted. Powder metallurgy bearings requiring double-sided chamfering require two chamfering presses: the first press for one side and the second for the other. During the second press, the bearing is conveyed to the chamfering die with the unchamfered side facing upward.

[0004] In the prior art, Figure 1 and Figure 2 As shown, the vibrating turntable A arranges the powder metallurgy bearings that need chamfering processing and conveys them one by one to the stamping die C through the conveying trough B. However, the vibrating turntable A and the conveying trough B cannot control the placement posture of the powder metallurgy bearings that need chamfering processing. The placement postures of the bearings include posture a in which the center axis of the bearing is vertical and the chamfered surface is facing downward, posture b in which the center axis of the bearing is horizontal, and posture c in which the center axis of the bearing is vertical and the chamfered surface is facing upward. For the powder metallurgy bearings in posture b in which the center axis of the bearing is horizontal and the posture c in which the center axis of the bearing is vertical and the chamfered surface is facing upward that do not meet the requirements, they need to be placed manually, which has the problems of low production efficiency, easy omission and danger in manual placement, etc.

[0005] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0006] In response to the above-mentioned defects of the prior art, the purpose of the present utility model is to provide an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, aiming to solve the problem that the prior art cannot control the placement posture of powder metallurgy bearings that require chamfering. For powder metallurgy bearings whose placement posture does not meet the requirements, posture b where the bearing center axis is horizontal, or posture c where the bearing center axis is vertical and the chamfered surface is facing upward, manual placement is required, which has the problems of low production efficiency, easy omissions and danger in manual placement.

[0007] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0008] An automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings comprises a first screening trough, a second screening trough, and a connecting trough. The first screening trough comprises a first base, a baffle, a first connecting block, a second connecting block, and a third connecting block. The first connecting block is mounted to the first base via a first bolt. The baffle is provided with a long, strip-shaped through-hole for the second bolt to move up and down. The second bolt passes through the through-hole of the baffle, securing the baffle to the first connecting block. The second connecting block is connected to the conveying trough of the vibrating turntable via a third bolt. The second screening trough comprises a second base, an inclined bottom plate, a baffle, a fourth connecting block, and a fifth connecting block. The inclined bottom plate is mounted on the second base. The baffle is mounted on the lower side of the inclined bottom plate and has a chamfer. The third connecting block is connected to the fourth connecting block via a fourth bolt. The connecting trough comprises a third base, a sixth connecting block, and a seventh connecting block. The fifth connecting block is connected to the sixth connecting block via a fifth bolt, and the seventh connecting block is connected to the conveying trough of the stamping die via a sixth bolt.

[0009] The automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings is characterized in that the slope of the inclined bottom plate of the second screening trough is 5°-10°.

[0010] The automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings is characterized in that the height of the block of the second screening trough is 0.5-1.5 mm.

[0011] In the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, the number of the third bolt and the sixth bolt is 2.

[0012] In the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, the number of the fourth bolt and the fifth bolt is one.

[0013] The beneficial effects are as follows: the third bolt of the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings of the present invention passes through the second connecting block to connect the first screening trough and the conveying trough of the vibrating turntable together, the sixth bolt passes through the seventh connecting block to connect the connecting trough and the conveying trough of the stamping die together, and the number of the third bolt and the sixth bolt is 2, which realizes the stable connection between the first screening trough and the conveying trough of the vibrating turntable and the stable connection between the connecting trough and the conveying trough of the stamping die. The fourth bolt passes through the third connecting block and the fourth connecting block to connect the first screening trough and the second screening trough together, and the fifth bolt passes through the fifth connecting block and the sixth connecting block to connect the second screening trough and the connecting trough together. The number of the fourth bolt and the fifth bolt is 1, which realizes the fine adjustment of the rotation of the second screening trough relative to the first screening trough.

[0014] The first connecting block of the first screening trough is installed on the first base of the first screening trough by a first bolt. The baffle of the first screening trough is provided with a long strip-shaped through hole for the second bolt to move up and down relative to each other. The second bolt passes through the through hole of the baffle to install the baffle on the first connecting block, so that the baffle of the first screening trough can be moved up and down to adjust the height to adapt to bearings of different sizes.

[0015] The utility model discloses an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, which is suitable for powder metallurgy bearings with an outer diameter to height ratio greater than 1 and one side chamfered. When the powder metallurgy bearings are conveyed from the conveying trough of the vibrating turntable to the first screening trough, the powder metallurgy bearings are placed in three postures: posture a with the center axis of the bearing vertical and the chamfered side facing downward, posture b with the center axis of the bearing horizontal, and posture c with the center axis of the bearing vertical and the chamfered side facing upward. Adjust the height of the baffle of the first screening trough to be greater than the height of the bearing but smaller than the outer diameter of the bearing. When the bearing in posture b with the center axis horizontal passes through the first screening trough, the baffle of the first screening trough moves the bearing to the side and drops it; the bearings in posture a with the center axis vertical and the chamfered surface facing downward and the bearings in posture c with the center axis vertical and the chamfered surface facing upward can pass through the first screening trough into the second screening trough, and the bearings in posture c with the center axis vertical and the chamfered surface facing upward move to the side and fall under the lateral force of the inclined bottom plate, while the chamfer of the bearing in posture a with the center axis vertical and the chamfered surface facing downward is stuck by the block on the lower side of the inclined bottom plate of the second screening trough. Rotate and fine-tune the second screening trough so that the chamfer on the block matches the chamfer of the bearing, so that the bearing in posture a with the center axis vertical and the chamfered surface facing downward passes through the second screening trough smoothly, and finally enters the connecting trough and is transported to the stamping die by only the bearing in posture a with the center axis vertical and the chamfered surface facing downward.

[0016] Thus, the powder metallurgy bearings conveyed from the conveying trough of the vibrating turntable are screened by the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings of the utility model. Only the bearings with the center axis vertical and the chamfered surface facing downward in posture a are conveyed to the stamping die for further chamfering, thereby realizing automatic control of the placement posture of the powder metallurgy bearings. The structure is simple and ingenious, and it is easy to maintain and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall assembly structure of the prior art.

[0018] Figure 2 It is a schematic diagram of the bearing placement.

[0019] Figure 3 It is a schematic diagram of the overall assembly structure of a preferred embodiment of an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings described in the present utility model.

[0020] Figure 4 It is a schematic diagram of the overall assembly partial structure of a preferred embodiment of an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings described in the present utility model.

[0021] Figure 5 This is a schematic diagram of the structure of a preferred embodiment of an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings described in this utility model. Figure 1 .

[0022] Figure 6 This is a schematic diagram of the structure of a preferred embodiment of an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings described in this utility model. Figure 2 .

[0023] Figure 7 It is a front view of a preferred embodiment of an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings described in the present utility model.

[0024] Figure 8 It is a side view of a preferred embodiment of an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings described in the present utility model. DETAILED DESCRIPTION

[0025] The present invention provides an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings. To make the purpose, technical solution, and effects of the present invention clearer and more explicit, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention.

[0026] The utility model provides an automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, comprising a first screening trough 21, a second screening trough 22, and a connecting trough 23. The first screening trough 21 comprises a first base 211, a baffle 212, a first connecting block 213, a second connecting block 214, and a third connecting block 215. The first connecting block 213 is mounted on the first base 211 via a first bolt 216. The baffle 212 is provided with an elongated through hole 218 for a second bolt 217 to move up and down. The second bolt 217 passes through the through hole 218 of the baffle 212 to mount the baffle 212 on the first connecting block 213. The second connecting block 214 is connected to the conveying trough 11 of the vibrating turntable 1 via a third bolt 219.

[0027] The second screening trough 22 includes a second base 221, an inclined bottom plate 222, a stopper 223, a fourth connecting block 224 and a fifth connecting block 225. The inclined bottom plate 222 is installed on the second base 221, and the stopper 223 is installed on the lower side of the inclined bottom plate 222. A chamfer 226 is provided on the stopper 223. The third connecting block 215 is connected to the fourth connecting block 224 by a fourth bolt 227.

[0028] The connecting groove 23 includes a third base 231, a sixth connecting block 232 and a seventh connecting block 233. The fifth connecting block 225 is connected to the sixth connecting block 232 via a fifth bolt 234, and the seventh connecting block 233 is connected to the conveying groove 31 of the stamping die 3 via a sixth bolt 235.

[0029] In the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, the slope of the inclined bottom plate 222 of the second screening trough 22 is 5°.

[0030] In the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, the height of the stopper 223 of the second screening trough 22 is 1 mm.

[0031] In the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, the number of the third bolt 219 and the sixth bolt 235 is two.

[0032] In the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, the number of the fourth bolt 227 and the fifth bolt 234 is one.

[0033] The working process of this utility model:

[0034] During use, the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings of the utility model is suitable for powder metallurgy bearings with an outer diameter to height ratio greater than 1 and one side chamfered.

[0035] The third bolt 219 of the automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings of the present invention passes through the second connecting block 214 to connect the first screening trough 21 and the conveying trough 11 of the vibration turntable 1 together, and the sixth bolt 235 passes through the seventh connecting block 233 to connect the connecting trough 23 and the conveying trough 31 of the stamping die 3 together. The number of the third bolt 219 and the sixth bolt 235 is 2, which realizes the firm connection between the first screening trough 21 and the conveying trough 11 of the vibration turntable 1 and the firm connection between the connecting trough 23 and the conveying trough 31 of the stamping die 3.

[0036] The fourth bolt 227 passes through the third connecting block 215 and the fourth connecting block 224 to connect the first screening slot 21 and the second screening slot 22 together. The fifth bolt 234 passes through the fifth connecting block 225 and the sixth connecting block 232 to connect the second screening slot 22 and the connecting slot 23 together. The number of the fourth bolt 227 and the fifth bolt 234 is 1, which realizes fine-tuning of the rotation of the second screening slot 22 relative to the first screening slot 21.

[0037] The first connecting block 213 of the first screening trough 21 is installed on the first base 211 of the first screening trough 21 by a first bolt 216. The baffle 212 of the first screening trough 21 is provided with a long strip-shaped through hole 218 for the second bolt 217 to move up and down relative to each other. The second bolt 217 passes through the through hole 218 of the baffle 212 to install the baffle 212 on the first connecting block 213, so that the baffle 212 of the first screening trough 21 can be moved up and down to adjust the height to adapt to bearings of different sizes.

[0038] When the powder metallurgy bearing is conveyed from the conveying trough 11 of the vibrating turntable 1 to the first screening trough 21, the powder metallurgy bearing is placed in three postures: posture a with the center axis of the bearing vertical and the chamfered surface facing downward, posture b with the center axis of the bearing horizontal, and posture c with the center axis of the bearing vertical and the chamfered surface facing upward. The height of the baffle 212 of the first screening trough 21 is adjusted to be greater than the height of the bearing but less than the outer diameter of the bearing. When the bearing in posture b with the center axis horizontal passes through the first screening trough 21, the baffle 212 of the first screening trough 21 moves the bearing to the side and drops it; while the bearings in posture a with the center axis vertical and the chamfered surface facing downward and posture c with the center axis vertical and the chamfered surface facing upward can pass through the first screening trough 21 and enter the second screening trough 22, while the bearing in posture c with the center axis vertical and the chamfered surface facing upward is placed on the inclined bottom plate 222 of the second screening trough 22. Under the action of the lateral force, it moves to the side and falls, and the chamfer of the bearing in posture a with the center axis vertical and the chamfered surface facing downward is stuck by the stopper 223 on the lower side of the inclined bottom plate 222 of the second screening groove 22. The second screening groove 22 is rotated and fine-tuned so that the chamfer 226 on the stopper 223 fits with the chamfer of the bearing, so that the bearing in posture a with the center axis vertical and the chamfered surface facing downward can pass through the second screening groove 22 smoothly, and finally enter the connecting groove 23 and be transported to the stamping die 3 with only the bearing in posture a with the center axis vertical and the chamfered surface facing downward.

[0039] Thus, the powder metallurgy bearings conveyed from the conveying trough 11 of the vibrating turntable 1 are screened by an automatic placement and conveying mechanism 2 for double-sided chamfering of powder metallurgy bearings of the present invention. Only the bearings with the center axis vertical and the chamfered surface facing downward in posture a are conveyed to the stamping die 3 for further chamfering, thereby realizing automatic control of the placement posture of the powder metallurgy bearings. The structure is simple and ingenious, and maintenance and use are convenient.

[0040] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An automatic placement and conveying mechanism for double-sided chamfering of powder metallurgy bearings, comprising a first screening trough, a second screening trough and a connecting trough, characterized in that: The first screening trough includes a first base, a baffle, a first connecting block, a second connecting block and a third connecting block, the first connecting block is installed on the first base by a first bolt, the baffle is provided with a long strip through hole for the second bolt to move up and down, the second bolt passes through the through hole of the baffle to install the baffle on the first connecting block, the second connecting block is connected to the conveying trough of the vibrating turntable by the third bolt, the second screening trough includes a second base, an inclined bottom plate, a block, a fourth connecting block and a fifth connecting block, the inclined bottom plate is installed on the second base, and the block is installed on the inclined bottom plate. On the lower side, a chamfer is provided on the stop block, the third connecting block is connected to the fourth connecting block by a fourth bolt, the connecting groove includes a third base, a sixth connecting block and a seventh connecting block, the fifth connecting block is connected to the sixth connecting block by a fifth bolt, and the seventh connecting block is connected to the conveying groove of the stamping die by a sixth bolt. The inclination of the inclined bottom plate of the second screening groove is 5°-10°, the height of the stop block of the second screening groove is 0.5-1.5mm, the number of the third bolt and the sixth bolt is 2, and the number of the fourth bolt and the fifth bolt is 1.

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