A needle roller bearing assembly machine

Abstract

The present invention belongs to the field of automation technology and provides a needle roller bearing assembly machine. The needle roller bearing assembly machine includes a workbench, on which a needle roller assembly mechanism is provided. The needle roller assembly mechanism is connected to a bearing bracket vibrating table and a needle roller vibrating table. At the outlet of the needle roller assembly mechanism, a movable conveying track is provided. A station commutation turntable is also provided on the workbench. Near the station commutation turntable, a feeding device, a pressing device, a vision device, and a sorting device are arranged in a clockwise direction. The feeding device is located at the end of the conveying track. A robotic arm and an outer ring transportation device are also provided on the workbench. The designed automatic needle roller bearing assembly machine of the present invention realizes the full-automatic operation of needle roller bearing assembly, avoids the influence of manual operation on product quality, improves production efficiency, improves assembly accuracy, and is suitable for popularization.

Description

Technical Field

[0001] The present invention belongs to the technical field of automation, and particularly relates to a needle roller bearing assembly machine. Background Art

[0002] A needle roller bearing is a component that plays a role in fixing and reducing the load friction coefficient during the mechanical transmission process. Its main function is to support the mechanical rotating body to reduce the mechanical load friction coefficient of the equipment during the transmission process. At present, most of the needle roller assemblies of domestic needle roller bearings are semi-automatic equipment, relying on manual operation. The manual operation is difficult, costly, and the quality of the assembled bearings is not high, the assembly efficiency is low, and safety accidents are prone to occur during the manual assembly process.

[0003] Therefore, in order to avoid the influence of manual assembly on the bearing quality, improve the production efficiency and assembly accuracy, it is necessary to design an automatic needle roller bearing assembly machine to solve the above problems. Summary of the Invention

[0004] To overcome the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a needle roller bearing assembly machine.

[0005] The present invention adopts the following technical solutions: The needle roller bearing assembly machine includes a workbench, on which a needle roller assembly mechanism is provided. The needle roller assembly mechanism is connected to a bearing bracket vibration table and a needle roller vibration table. A movable conveying track is provided at the outlet of the needle roller assembly mechanism. A station commutation turntable is also provided on the workbench. A feeding device, a pressing device, a vision device, and a sorting device are arranged clockwise near the station commutation turntable. The feeding device is located at the end of the conveying track. A robotic arm and an outer ring transportation device are also provided on the workbench.

[0006] Further, the needle roller assembly mechanism includes a mounting table, on which a positioning block with a notch at one end is provided. An arc-shaped block that can be lifted is arranged inside the positioning block. There is a guiding block with a semi-circular groove at the bottom directly above the arc-shaped block. The guiding block is provided with a needle roller channel communicating with the semi-circular groove. A moving seat is also provided outside the positioning block. A rotating shaft is installed at the position of the moving seat facing the guiding block. There is a needle roller feeding die at the top of the guiding block, and the needle roller feeding die is connected to the needle roller vibration table.

[0007] Further, a longitudinal track and a vertical plate are also provided on the mounting table. The moving seat is installed on the longitudinal track. A linear cylinder is arranged between the vertical plate and the moving seat. A pressing block is provided at the end of the rotating shaft.

[0008] Further, the conveying track includes a pushing cylinder. A connecting frame is provided on the output shaft of the pushing cylinder. The top of the connecting frame is provided with a conveying frame that is wider at the front and narrower at the rear. The front end of the conveying frame is lower than the guiding block.

[0009] Further, the feeding device includes a mounting frame and a fixing plate. A feeding bin is provided outside the fixing plate. A feeding port is opened at the front end of the feeding bin corresponding to the end of the conveying frame, and a pushing port is opened at the end of the feeding bin. A pushing cylinder is provided outside the feeding bin corresponding to the pushing port. A reversing motor is provided between the mounting frame and the fixing plate. A reversing sleeve is provided at the end of the reversing motor. A transverse cylinder is provided on the mounting frame. A mounting block is provided on the transverse cylinder. A feeding cylinder is mounted downward on the mounting block. A picking clamp is provided at the end of the feeding cylinder.

[0010] Further, there are a plurality of positioning carrier sleeves on the station reversing turntable.

[0011] Further, the pressing device includes a fixing frame. An assembly cylinder is mounted downward at the top of the fixing frame corresponding to the positioning carrier sleeve. A matching pressing sleeve is provided at the end of the assembly cylinder.

[0012] Further, the vision device includes a vertical rod. A vision mounting seat is provided at the top of the vertical rod corresponding to the positioning carrier sleeve. An industrial camera is provided downward on the vision mounting seat and facing the positioning carrier sleeve.

[0013] Further, the sorting device includes a support plate and a sorting cylinder. A sorting bin is mounted outward on the support plate. The sorting bin is provided with one feeding port and two discharging ports. Storage trays are provided at the bottoms of the discharging ports. A partition plate is rotatably provided at the bottom of the intersection of the two discharging ports. A connecting block is rotatably provided at the output end of the sorting cylinder. The connecting block is connected to the corresponding side of the partition plate.

[0014] Further, the outer ring transportation device includes a belt conveyor. A guide rod is provided on the belt conveyor. An outer ring positioning block is provided at the end of the guide rod.

[0015] The beneficial effects of the present invention are as follows: This device mainly automatically assembles the needle rollers into the bearing bracket through the needle roller assembly mechanism. After assembly, the bearing bracket is transported and installed into the positioning carrier sleeve with the bearing outer ring by the feeding device. Then, the bearing outer ring and the bearing bracket are pressed by the pressing device. The assembled bearings are sequentially selected by the vision device, and the selected bearings are placed in the sorting device by the robotic arm for classification. This device realizes the automatic assembly of bearings, avoids the influence of manual operation on product quality, improves production efficiency, improves assembly accuracy, and is suitable for popularization. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of a needle roller bearing assembling machine provided by the present invention.

[0017] Figure 2 is the structural schematic diagram of the needle roller assembly mechanism provided by the present invention.

[0018] Figure 3 This is the enlarged view of the guiding block provided by the present invention.

[0019] Figure 4 This is the schematic diagram of the clamping block installation provided by the present invention.

[0020] Figure 5 This is the clamping diagram of the bearing bracket provided by the present invention.

[0021] Figure 6 This is the schematic structural diagram of the feeding device provided by the present invention.

[0022] Figure 7 This is the schematic structural diagram of the sorting device provided by the present invention. Detailed implementation manners

[0023] In order to make the object, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In order to illustrate the technical solutions described in the present invention, the following will be described through specific embodiments.

[0025] For the sake of convenience of description, only the parts related to the embodiments of the present invention are shown.

[0026] Combined with Figure 1-7 As shown, the needle roller bearing assembly machine includes a workbench 1, a needle roller assembly mechanism 2 is provided on the workbench, the needle roller assembly mechanism is connected with a bearing bracket vibrating table 3 and a needle roller vibrating table 4, a movable conveying track 5 is provided at the outlet of the needle roller assembly mechanism, a station commutation turntable 6 is also provided on the workbench, a feeding device 7, a pressing device 8, a vision device 9 and a sorting device 10 are arranged clockwise near the station commutation turntable, the feeding device is located at the end of the conveying track, a robotic arm 11 and an outer ring transportation device 12 are also provided on the workbench; there are a plurality of positioning carriers 61 on the station commutation turntable.

[0027] There is a circle of clamping strips on the outer periphery of the bearing bracket 13, and installation notches are formed between adjacent clamping strips. This device mainly automatically assembles the needle rollers into the installation notches of the bearing bracket 13 through the needle roller assembly mechanism. After assembly, the needle rollers assembled with the bearing bracket are transported and installed into the positioning carrier sleeve by the feeding device. It should be noted that: inside the positioning carrier sleeve, the bearing outer ring 14 on the outer ring transportation device of the multi-joint robotic arm is clamped and placed in the positioning carrier sleeve in advance one by one, and then the bearing bracket and the bearing outer ring are pressed and assembled through the pressing device; finally, the finished parts that meet the assembly requirements are selected through the vision device by the station commutation turntable and placed into the sorting device by the robotic arm. The bearing bracket vibrating table and the needle roller vibrating table respectively automatically provide the bearing bracket and the needle rollers for the needle roller assembly mechanism, enabling it to assemble the needle rollers into the bearing bracket.

[0028] As a preferred structure, as shown in Figure 2-5 : The needle roller assembly mechanism 2 includes a mounting table 21. A positioning block 22 with a notch at one end is provided on the mounting table. An elevating arc-shaped block 23 is provided inside the positioning block. There is a guiding block 24 with a semi-circular groove at the bottom directly above the arc-shaped block. The guiding block is provided with a needle roller channel 241 communicating with the semi-circular groove. A moving seat 25 is further provided outside the positioning block. A rotating shaft 26 is installed on the moving seat facing the guiding block. There is a needle roller feeding die 27 at the top of the guiding block, and the needle roller feeding die is connected to the needle roller vibrating table. A longitudinal track 28 and a vertical plate 29 are also provided on the mounting table. The moving seat is installed on the longitudinal track. A linear cylinder 210 is provided between the vertical plate and the moving seat. A pressing block 211 is provided at the end of the rotating shaft.

[0029] In this structure, the discharge port of the bearing bracket vibrating table is connected to the notch of the positioning block through a guide rail frame 213, so that the bearing bracket slides from the discharge port of the bearing bracket vibrating table into the positioning block. Then, the bearing bracket is lifted into the semi-circular groove of the guiding block by the elevating arc-shaped block. After that, the moving seat moves towards the bearing bracket until the pressing block installed on the rotating shaft of the moving seat presses the bearing bracket tightly. When the pressing block presses the bearing bracket tightly, the elevating arc-shaped block returns to its original position.

[0030] It should be noted that: the needle roller feeding die is installed on the feeding die mounting seat 15, and a rotatable pressing block corresponding to the rotating shaft and facing the guiding block is also installed inside the feeding die mounting seat. When the arc-shaped block lifts the bearing bracket into the semi-circular groove of the guiding block, the moving seat moves towards the bearing bracket until the bearing bracket is clamped between the two pressing blocks, and the rotating shaft drives the pressing block to rotate, thereby driving the bearing bracket to rotate synchronously.

[0031] The needle vibrator transports the needles to the needle feeding die. The needles pass through the needle feeding die through the needle channels opened in the guiding blocks that communicate with the semi-circular grooves to the bearing bracket. Since the guiding blocks are semi-circular grooves with a small gap from the surface of the bearing bracket, and the needle channels and the guiding blocks are semi-circular grooves with a certain curvature. When the needles fall to the corresponding positions on the bearing bracket through the needle channels, the bearing bracket continues to rotate, and the guiding blocks exert an extrusion force on the needles, which can automatically push the needles one by one to the installation bayonet positions on the bearing bracket. An inductor 212 is also installed at the corresponding position of the guiding block. The inductor mainly records the rotation angle of the bearing bracket to judge the situation of the bearing bracket assembling the needles. When the bearing bracket has assembled the needles, the rotating shaft can stop rotating, and then the assembled bearing bracket is transported to the feeding device through the conveying track for the next process. At the same time, the rotating shaft returns to the original position through the moving seat and waits to assemble the next bearing bracket.

[0032] Specifically: when the rotating shaft moves towards the guiding block, it is mainly pushed to the moving seat by a linear cylinder. When the linear cylinder pushes, the moving seat slides up along the longitudinal track to the corresponding position.

[0033] In this structure, combined with Figure 2 and Figure 6 as shown: The conveying track 5 includes a pushing cylinder 51. The output shaft of the pushing cylinder is provided with a connecting frame 52. The top of the connecting frame is provided with a conveying frame 53 that is wider at the front and narrower at the rear. The front end of the conveying frame is lower than the guiding block. The feeding device 7 includes a mounting frame 71 and a fixing plate 72. The outer side of the fixing plate is provided with a feeding bin 73. The front end of the feeding bin is provided with a feeding port 74 corresponding to the end of the conveying frame. The end of the feeding bin is provided with a pushing port (not shown in the figure). A pushing cylinder 75 is provided outside the feeding bin corresponding to the pushing port. A reversing motor 76 is provided between the mounting frame and the fixing plate. The end of the reversing motor is provided with a reversing sleeve 77. A transverse cylinder 78 is provided on the mounting frame. An installation block 79 is provided on the transverse cylinder. A feeding cylinder 710 is installed downward on the installation block. A picking clamp 711 is provided at the end of the feeding cylinder.

[0034] After the bearing bracket is assembled with the needle rollers, the conveying rack moves under the action of the pushing cylinder. The front end of the conveying rack moves to the lower end of the bearing bracket, and the rear end of the conveying rack is located at the feeding port of the feeding bin. When the conveying rack is in place, the moving seat moves backward under the action of the linear cylinder, and then the bearing bracket drops onto the conveying rack. The bearing bracket slides down through the conveying rack into the feeding bin. After entering from the feeding port of the feeding bin, the bearing bracket slides to the pushing port of the feeding bin. At this time, the reversing sleeve provided at the end of the reversing motor faces and is close to the outside of the pushing port. The pushing cylinder pushes the bearing bracket into the reversing sleeve. After the reversing motor rotates 90°, at this time, the transverse cylinder provided on the mounting frame corresponds to the reversing motor. The feeding cylinder moves downward until the picking clamp straightens into the bearing bracket and clamps the bearing bracket. After clamping, the output shaft of the feeding cylinder moves upward. At this time, the station reversing turntable stops rotating, and the positioning carrier sleeve equipped with the bearing outer ring is exactly located at the corresponding position of the feeding device. The transverse cylinder moves above the positioning carrier sleeve, and the feeding cylinder assembles the bearing bracket into the bearing outer ring. When the bearing bracket is assembled into the bearing outer ring, the station reversing turntable rotates, and the positioning carrier sleeve is rotated to the position directly below the pressing device, and the station reversing turntable stops rotating to press the bearing bracket and the bearing outer ring together.

[0035] In this device, the pressing device 8 includes a fixed frame 81. The top of the fixed frame faces downward and is provided with an assembly cylinder 82 corresponding to the positioning carrier sleeve. The end of the assembly cylinder is provided with a matching pressing sleeve 83. When the positioning carrier sleeve equipped with the bearing bracket and the bearing outer ring is located directly below the pressing device, the output shaft of the assembly cylinder moves downward, and the pressing sleeve moves downward to press the bearing bracket and the bearing outer ring together to complete the assembly of the bearing.

[0036] After the assembly is completed, the station reversing turntable rotates to turn the assembled bearing to directly below the vision device, and the vision device is used to select the bearing.

[0037] Further, as a preferred structure, the vision device 9 includes a vertical rod 91. The top of the vertical rod is provided with a vision mounting seat 92 corresponding to the positioning carrier sleeve. The vision mounting seat faces downward and is provided with an industrial camera 93 directly opposite the positioning carrier sleeve; combined with Figure 7 As shown: The sorting device 10 includes a support plate 101 and a sorting cylinder 102. The support plate is provided with a sorting bin 103 mounted outward. The sorting bin is provided with an inlet 104 and two outlets 105. The bottom of each outlet is provided with a storage tray 106. A partition plate 107 is rotatably provided at the bottom where the two outlets meet. The output end of the sorting cylinder is rotatably provided with a connecting block 108, and the connecting block is connected to the corresponding side of the partition plate. The bearing is photographed and processed by the industrial camera to select whether the bearing is assembled in place.

[0038] After being recognized by the vision device, the bearing is clamped out by the robotic arm and moved to the feeding port of the sorting bin for sorting. Storage trays are provided at the bottoms of both of the two discharge ports, one of which is a storage tray for unqualified products and the other is a storage tray for qualified products. If the bearing is not assembled in place, the output end of the sorting cylinder pushes the connecting block, and the connecting block drives the partition plate to rotate. Then, after the partition plate rotates in place, the discharge port above the unqualified storage tray is opened. If the bearing is assembled in place, it will slide down along the partition plate to the storage tray for qualified products in the same way.

[0039] Combined with Figure 1 As shown: The outer ring transportation device 12 includes a belt conveyor 121. A guide rod 122 is provided on the belt conveyor, and an outer ring positioning block 123 is provided at the end of the guide rod. The outer ring transportation device mainly transports the bearing outer ring through the belt conveyor, and then the robotic arm clamps the bearing outer ring onto the positioning sleeve. The outer ring positioning block mainly functions to position the bearing outer ring on the belt conveyor. On the one hand, the guide rod plays a guiding role for the bearing outer ring during transportation, and on the other hand, it prevents the bearing outer ring from falling off the belt conveyor.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the invention shall be included within the protection scope of the present invention.

Claims

1. A needle roller bearing assembly machine, characterized in that: The needle roller bearing assembly machine includes a workbench, on which a needle roller assembly mechanism is provided. The needle roller assembly mechanism is connected to a bearing bracket vibrating table and a needle roller vibrating table. At the outlet of the needle roller assembly mechanism, there is a movable conveying track. On the workbench, there is also a station commutation turntable. Near the station commutation turntable, a feeding device, a pressing device, a vision device, and a sorting device are arranged in a clockwise direction. The feeding device is located at the end of the conveying track. On the workbench, there are also a robotic arm and an outer ring conveying device. The needle roller assembly mechanism includes a mounting table, on which a positioning block with a notch at one end is provided. Inside the positioning block, there is a liftable arc-shaped block. Above the arc-shaped block, there is a guide block with a semi-circular groove at the bottom. The guide block is provided with a needle roller channel communicating with the semi-circular groove. Outside the positioning block, there is also a moving seat. A rotating shaft is installed at the position of the moving seat facing the guide block. At the top of the guide block, there is a needle roller feeding die, which is connected to the needle roller vibrating table. On the mounting table, there are also a longitudinal track and a vertical plate. The moving seat is installed on the longitudinal track. A linear cylinder is arranged between the vertical plate and the moving seat. A pressing block is provided at the end of the rotating shaft. The conveying track includes a pushing cylinder. The output shaft of the pushing cylinder is provided with a connecting frame. The top of the connecting frame is provided with a conveying frame that is wider at the front and narrower at the rear. The front end of the conveying frame is lower than the guide block. The feeding device includes a mounting frame and a fixing plate. Outside the fixing plate, there is a feeding bin. At the front end of the feeding bin, a feeding port is opened corresponding to the end of the conveying frame, and a pushing port is opened at the end of the feeding bin. A pushing cylinder is arranged outside the feeding bin corresponding to the pushing port. A commutation motor is arranged between the mounting frame and the fixing plate. A commutation sleeve is provided at the end of the commutation motor. A transverse cylinder is arranged on the mounting frame. An installation block is arranged on the transverse cylinder. A feeding cylinder is installed downward on the installation block. A picking clamp is provided at the end of the feeding cylinder.

2. The needle roller bearing assembly machine according to claim 1, characterized in that: There are multiple positioning carrier sleeves on the station commutation turntable.

3. The needle roller bearing assembly machine according to claim 1, characterized in that: The pressing device includes a fixing frame. At the top of the fixing frame, a mounting cylinder is installed downward corresponding to the positioning carrier sleeve. A matching pressing sleeve is provided at the end of the mounting cylinder.

4. The needle roller bearing assembly machine according to claim 1, characterized in that: The vision device includes a vertical rod. At the top of the vertical rod, a vision mounting seat is provided corresponding to the positioning carrier sleeve. An industrial camera is provided downward on the vision mounting seat and facing the positioning carrier sleeve.

5. The needle roller bearing assembly machine according to claim 1, characterized in that: The sorting device includes a support plate and a sorting cylinder. An outer sorting bin is installed outward on the support plate. The sorting bin is provided with an inlet, two outlets, and storage trays are provided at the bottoms of the outlets. A partition plate is rotatably arranged at the bottom where the two outlets meet. The output end of the sorting cylinder is rotatably provided with a connecting block, and the connecting block is connected to the corresponding side of the partition plate.

6. The needle roller bearing assembly machine according to claim 1, characterized in that: The outer ring conveying device includes a belt conveying device. A guide rod is arranged on the belt conveying device, and an outer ring positioning block is provided at the end of the guide rod.

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