Double-row bearing grease injection device and grease injection method

Abstract

The invention discloses a grease injection device and method for a double-row bearing. The double-row bearing comprises an outer ring, two inner rings and corresponding rollers. The device comprises a workbench, a conveying mechanism, an upper grease injection head, a middle grease injection head, a first lifting assembly, a lower grease injection head, a second lifting assembly and a rotary driving assembly. The workbench is divided into a machining area and a non-machining area, and the machining area is provided with a supporting platform for supporting the outer ring and a rotating platform for supporting the second inner ring. The conveying mechanism drives the bearing to move between the two areas; the upper grease injection head and the middle grease injection head are located over the machining area and inject grease into the first roller gap and the middle seam between the two inner rings. The first lifting assembly can drive the upper grease injection head and the middle grease injection head to ascend and descend. The lower grease injection head injects grease into the second roller gap under the machining area; the second lifting assembly drives the rotating platform and the lower grease injection head to ascend and descend. The rotating driving assembly drives the rotating platform to rotate. Multi-directional one-time grease injection is achieved, insufficient grease injection at the two ends is overcome, manual turnover secondary grease injection is avoided, the efficiency is improved, the cost is reduced, and the method is suitable for batch production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grease injection devices, in particular to a double-row bearing grease injection device and a grease injection method. BACKGROUND

[0002] A double-row bearing is provided with two rows of balls inside a bearing, which is used to ensure that the bearing can bear greater load during work. The oil must be added to the inner cavity of the bearing during production to make it combined with the balls, so as to ensure stable and effective rotation work.

[0003] At present, the process of adding oil to the double-row bearing is generally to inject oil from both ends of the bearing. During oil injection, the oil needs to be injected on both sides in the forward and reverse directions. The operator needs to place the double-row bearing on the grease injection machine, and the grease injection machine injects oil into one side of the bearing. Then the bearing is turned over to ensure smooth oil injection. This oil injection method requires people to constantly turn over the bearing. Two times of grease injection are required for one bearing, which wastes time and cannot complete the grease injection at one time, seriously affecting the overall production efficiency. Especially in the scenario of mass production of double-row bearings, a large number of turning operations will accumulate significant time costs, resulting in a slowdown of the overall rhythm of the production line. In addition, the oil injection from both sides also has the problem of uneven oil distribution. Due to the complexity of the internal structure of the double-row bearing, it is difficult to fully fill the gap between the inner ring and the rolling body of the bearing by injecting oil from both ends. It is easy to have the situation that the local oil is too much and the oil in the core working area is scarce, which reduces the lubrication effect of the bearing and shortens the service life of the bearing. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a double-row bearing grease injection device and a grease injection method, which can directly inject oil from the middle part of the bearing inner ring, complementing the oil injection from both ends, ensuring that the oil is quickly and evenly filled to each key position inside the bearing, effectively avoiding the problem of insufficient local lubrication. This multi-directional one-time grease injection method eliminates the steps of manual turning and secondary grease injection, significantly shortens the grease injection time of a single bearing, significantly improves the production efficiency, reduces the labor operation cost, and is more suitable for large-scale batch production requirements.

[0005] The present application is implemented by the following technical solutions:

[0006] A double-row bearing grease injection device, the double-row bearing comprising an outer ring, a first inner ring, a second inner ring, a plurality of first rollers located between the outer ring and the first inner ring, and a plurality of second rollers located between the outer ring and the second inner ring;

[0007] The grease injection device comprises:

[0008] a workbench having a machining area and a non-machining area; the workbench comprises a support platform and a rotating platform located in the machining area, the support platform is used for supporting the outer ring, and the rotating platform is used for supporting the second inner ring of the double-row bearing;

[0009] a conveying mechanism used for driving the double-row bearing to move between the machining area and the non-machining area;

[0010] an upper lubricating head located directly above the machining area and used for lubricating the gap between the plurality of first rollers;

[0011] a middle lubricating head located directly above the machining area and used for lubricating the middle gap between the first inner ring and the second inner ring;

[0012] a first lifting assembly comprising a first cylinder and a second cylinder, the first cylinder is used for driving the upper lubricating head to perform lifting movement, and the second cylinder is used for driving the middle lubricating head to perform lifting movement;

[0013] a lower lubricating head located directly below the machining area and used for lubricating the gap between the plurality of second rollers;

[0014] a second lifting assembly comprising a third cylinder, a fourth cylinder and a fifth cylinder, the third cylinder and the fourth cylinder are respectively used for driving the rotating platform to perform lifting movement, and the fifth cylinder is used for driving the lower lubricating head to perform lifting movement;

[0015] a rotating driving assembly used for driving the rotating platform to rotate.

[0016] Further, the first lifting assembly further comprises a fixed support, a first movable support, a second movable support and a connecting rod, the first movable support is located directly above the fixed support, and the second movable support is located directly below the fixed support;

[0017] the second cylinder is fixed on the first movable support, and the piston rod of the second cylinder is fixedly connected with the fixed support, one end of the connecting rod is fixedly connected with the first movable support, and the other end of the connecting rod is fixedly connected with the middle lubricating head;

[0018] the first cylinder is fixed on the fixed support, and the piston rod of the first cylinder is fixedly connected with the second movable support, and the side of the second movable support away from the first cylinder is fixedly connected with the upper lubricating head.

[0019] Further, the first lifting assembly further comprises a first guide rod, one end of the first guide rod is fixedly connected with the second movable support, and the other end of the first guide rod sequentially penetrates through the fixed support and the first movable support;

[0020] The first linear bearing is fixed on the fixed support, the second linear bearing is fixed on the first movable support, and the first guide rod is in sliding connection with the first linear bearing and the second linear bearing respectively;

[0021] The third linear bearing is further fixed on the fixed support, and the connecting rod is in sliding connection with the third linear bearing.

[0022] Further, the middle grease injection head comprises a grease distribution connector and a grease outlet seat, one side of the grease distribution connector is fixedly connected with the connecting rod, and the other side of the grease distribution connector is fixedly connected with the grease outlet seat, a plurality of injection nozzles are arranged on the grease outlet seat in a circumferential direction, a main grease inlet channel is formed in the connecting rod, a plurality of branch grease inlet channels are formed in the grease distribution connector, one end of each of the branch grease inlet channels is in communication with the main grease inlet channel, and the other end of each of the branch grease inlet channels is in one-to-one correspondence with one of the injection nozzles.

[0023] Further, the upper grease injection head and the lower grease injection head are symmetrically arranged about a horizontal plane;

[0024] A plurality of first protrusions are arranged in a ring shape on one side of the upper grease injection head facing the workbench, the plurality of first protrusions are inserted into gaps between the plurality of first rollers in one-to-one correspondence, and a first grease injection port is arranged at a tooth tip of each of the first protrusions;

[0025] A plurality of second protrusions are arranged in a ring shape on one side of the lower grease injection head facing the workbench, the plurality of second protrusions are inserted into gaps between the plurality of second rollers in one-to-one correspondence, and a second grease injection port is arranged at a tooth tip of each of the second protrusions.

[0026] Further, the second lifting assembly comprises a fixed bottom plate, a fixed upper plate, a fixed rod, a movable plate, a transmission rod, and a floating connector, the top of the fixed rod is fixedly connected with the workbench, the bottom of the fixed rod is fixedly connected with the fixed bottom plate, the fixed upper plate is fixedly connected with the fixed rod and located between the workbench and the fixed bottom plate, and the movable plate is movably arranged between the fixed bottom plate and the fixed upper plate;

[0027] The third cylinder is fixed on the movable plate, and the piston rod of the third cylinder is fixedly connected with the fixed bottom plate;

[0028] The fourth cylinder is fixed on the movable plate, the floating joint is rotatably connected to the end of the piston rod of the fourth cylinder, and the floating joint is fixedly connected with the end of the transmission rod, and the end of the transmission rod away from the floating joint is fixedly connected with the rotating platform;

[0029] The fifth cylinder is fixed on the fixed upper plate, and the piston rod of the fifth cylinder is fixedly connected with the lower lubricating head.

[0030] Further, the second lifting assembly further comprises a second guide rod, a fourth linear bearing and a fifth linear bearing, the fourth linear bearing is fixedly connected with the movable plate, the fifth linear bearing is fixedly connected with the lower lubricating head, the bottom end of the second guide rod is fixedly connected with the fixed bottom plate, and the second guide rod is slidably connected with the fourth linear bearing and the fifth linear bearing respectively.

[0031] Further, the fixed upper plate is fixed with a bearing seat, the transmission rod is externally sleeved with a rod sleeve, the rod sleeve and the bearing seat are fixedly connected through a deep groove ball bearing, a plurality of keys are protruded in the circumferential direction of the transmission rod, and a plurality of first matching grooves for accommodating the keys are concave formed in the inner circumferential wall of the rod sleeve.

[0032] The rotating drive assembly comprises a motor, a driving wheel, a driven wheel and a synchronous belt, the driving wheel is fixed on the rotating shaft of the motor, the driven wheel is drivingly connected with the driving wheel through the synchronous belt, the driven wheel is externally sleeved on the transmission rod, the driven wheel is coaxially fixedly connected with the rod sleeve, and a plurality of second matching grooves for accommodating the keys are concave formed in the inner circumferential wall of the driven wheel.

[0033] The keys are slidably connected with the first matching grooves and the second matching grooves respectively.

[0034] Further, the conveying mechanism comprises a single-axis motion module, a moving block, a connecting block, a first pushing gripper and a second pushing gripper, the moving block is fixedly connected with the sliding block on the single-axis motion module, the connecting block is fixedly connected with the moving block, the first pushing gripper and the second pushing gripper are fixedly connected with the connecting block respectively, and the first pushing gripper and the second pushing gripper are located above the workbench to push the double-row bearing.

[0035] A lubricating method of the double-row bearing lubricating device, comprising the following steps:

[0036] Preparation of materials: placing the double-row bearing to be lubricated in the non-processing area of the workbench;

[0037] Material transfer to processing area: the conveying mechanism pushes the double-row bearing located in the non-processing area to the processing area of the workbench, so that the support platform supports the outer ring of the double-row bearing, and the rotating platform supports the second inner ring of the double-row bearing; at this time, the rotating platform is located at the initial position, and the upper surface of the rotating platform is coplanar with the upper surface of the support platform;

[0038] Exposing the middle seam: the third cylinder drives the rotating platform to descend, and the descending of the rotating platform drives the second inner ring of the double-row bearing to descend to expose the middle seam between the first inner ring and the second inner ring;

[0039] Middle grease injection head and upper grease injection head: the second cylinder drives the middle grease injection head to descend to the middle seam, and the middle grease injection head injects grease to the middle seam, then the first cylinder drives the upper grease injection head to descend, and the upper grease injection head injects grease to the gap between the plurality of first rollers, after the middle grease injection head and the upper grease injection head finish injecting grease, the first cylinder drives the upper grease injection head to ascend to the initial position first, then the second cylinder drives the middle grease injection head to ascend to the initial position again, and finally the third cylinder drives the rotating platform to ascend to the initial position again;

[0040] Lower grease injection head: the fifth cylinder drives the lower grease injection head to ascend, and the lower grease injection head injects grease to the gap between the plurality of second rollers, after the injection is finished, the fifth cylinder drives the lower grease injection head to descend to the initial position again;

[0041] Grease uniformization: the fourth cylinder drives the rotating platform to ascend and in turn drives the second inner ring to ascend, and the rotating drive assembly drives the rotating platform to rotate and in turn drives the second inner ring to rotate for grease uniformization, after the grease uniformization is finished, the rotating drive assembly stops working, and the fourth cylinder drives the rotating platform to descend to the initial position again;

[0042] Material transfer to non-processing area: the conveying mechanism pushes the double-row bearing after the grease injection is finished to the non-processing area of the workbench.

[0043] Compared with the prior art, the advantages of the present application are:

[0044] Through the cooperation of multi-directional grease injection and rotating action, all parts in need of lubrication in the bearing can be accurately covered, the blind area of the traditional grease injection method is completely avoided, and the grease filling is uniform and sufficient. At the same time, the whole process is automatic operation, without manual turning or secondary grease injection, which greatly shortens the grease injection time of a single bearing, significantly improves the production efficiency, reduces the error caused by manual intervention, reduces the labor cost and operation risk, and completely adapts to the large-scale batch production demand of double-row tapered roller bearings. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 It is a structural schematic view of the grease injection device;

[0046] Figure 2 It is a sectional view of the grease injection device;

[0047] Figure 3 Structure diagram of the first lifting assembly, the upper grease injection head and the middle grease injection head;

[0048] Figure 4 Sectional view of the first lifting assembly, the upper grease injection head and the middle grease injection head;

[0049] Figure 5 Structure diagram of the upper grease injection head and the middle grease injection head;

[0050] Figure 6 Structure diagram of the second lifting assembly, the rotary driving assembly and the lower grease injection head;

[0051] Figure 7 Sectional view of the second lifting assembly, the rotary driving assembly and the lower grease injection head;

[0052] Figure 8 Partial structure exploded view of the grease injection device;

[0053] Figure 9 Partial structure diagram of the grease injection device;

[0054] Figure 10 Flow chart of the grease injection method.

[0055] 1, double row bearing; 10, outer ring; 11, first inner ring; 12, second inner ring; 13, first roller; 14, second roller; 15, middle joint; 100, workbench; 110, support platform; 120, rotating platform; 200, conveying mechanism; 210, single-axis movement module; 2100, sliding block; 220, moving block; 230, connecting block; 240, first pushing grab; 250, second pushing grab; 300, upper grease injection head; 310, first protruding tooth; 311, first grease injection port; 400, middle grease injection head; 410, grease distribution connector; 420, grease outlet seat; 421, grease injection nozzle; 500, first lifting assembly; 510, first air cylinder; 520, second air cylinder; 530, fixed support; 531, first movable support; 532, second movable support; 533, connecting rod; 5330, main grease inlet; 534, first guide rod; 535, first linear bearing; 536, second linear bearing; 537, third linear bearing; 600, lower grease injection head; 610, second protruding tooth; 611, second grease injection port; 700, second lifting assembly; 710, third air cylinder; 720, fourth air cylinder; 730, fifth air cylinder; 740, fixed bottom plate; 741, fixed upper plate; 742, fixed rod; 743, movable plate; 744, transmission rod; 7440, protruding key; 745, floating connector; 746, second guide rod; 747, fourth linear bearing; 748, fifth linear bearing; 750, bearing seat; 760, rod sleeve; 7600, first matching groove; 770, deep groove ball bearing; 800, rotating drive assembly; 810, motor; 820, driving wheel; 830, driven wheel; 8300, second matching groove; 840, synchronous belt; 910, first sensor; 920, second sensor. DETAILED DESCRIPTION

[0056] The technical solutions of the present application will be further described in detail below with reference to the preferred embodiments and the accompanying drawings. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. In addition, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, but cannot be understood as limiting the present application.

[0057] As Figure 1 , Figure 2 and Figure 6As shown, the double-row bearing grease injection device in an embodiment of the present application, in the embodiment, the double-row bearing 1 is a double-row tapered roller bearing, and the double-row bearing 1 specifically comprises an outer ring 10, a first inner ring 11, a second inner ring 12, a plurality of first rollers 13 located between the outer ring 10 and the first inner ring 11, and a plurality of second rollers 14 located between the outer ring 10 and the second inner ring 12. The grease injection device comprises a workbench 100, a conveying mechanism 200, an upper grease injection head 300, a middle grease injection head 400, a first lifting assembly 500, a lower grease injection head 600, a second lifting assembly 700, and a rotary driving assembly 800. The workbench 100 has a processing area and a non-processing area, and comprises a support platform 110 and a rotary platform 120 located in the processing area. The support platform 110 is used for supporting the outer ring 10, and the rotary platform 120 is used for supporting the second inner ring 12 of the double-row bearing 1. The conveying mechanism 200 is used for driving the double-row bearing 1 to move between the processing area and the non-processing area. The upper grease injection head 300 is located directly above the processing area and is used for injecting grease into the gap between the plurality of first rollers 13. The middle grease injection head 400 is located directly above the processing area and is used for injecting grease into the middle joint 15 located between the first inner ring 11 and the second inner ring 12. The first lifting assembly 500 comprises a first air cylinder 510 and a second air cylinder 520. The first air cylinder 510 is used for driving the upper grease injection head 300 to move up and down, and the second air cylinder 520 is used for driving the middle grease injection head 400 to move up and down. The lower grease injection head 600 is located directly below the processing area and is used for injecting grease into the gap between the plurality of second rollers 14. The second lifting assembly 700 comprises a third air cylinder 710, a fourth air cylinder 720, and a fifth air cylinder 730. The third air cylinder 710 and the fourth air cylinder 720 are respectively used for driving the rotary platform 120 to move up and down, and the fifth air cylinder 730 is used for driving the lower grease injection head 600 to move up and down. The rotary driving assembly 800 is used for driving the rotary platform 120 to rotate. During operation, the conveying mechanism 200 first conveys the double-row bearing 1 to be injected with grease from the non-processing area of the workbench 100 to the processing area, so that the outer ring 10 of the double-row bearing 1 is stably supported on the support platform 110, and the second inner ring 12 corresponds to be placed on the rotary platform 120. Then, the third air cylinder 710 drives the rotary platform 120 to descend, and the rotary platform 120 descends to drive the second inner ring 12 of the double-row bearing 1 to descend to expose the middle joint 15 located between the first inner ring 11 and the second inner ring 12. Subsequently, the second air cylinder 520 drives the middle grease injection head 400 to descend to the middle joint 15 for grease injection, the first air cylinder 510 drives the upper grease injection head 300 to descend to the gap between the first rollers 13 for grease injection, and then the fifth air cylinder 730 drives the lower grease injection head 600 to ascend to the gap between the second rollers 14 for grease injection. After the grease injection is completed, the three grease injection heads are returned to the original positions, then the fourth air cylinder 720 drives the rotary platform 120 to ascend and in turn drives the second inner ring 12 to ascend, and then the rotary driving assembly 800 drives the rotary platform 120 to rotate and in turn drives the second inner ring 12 to rotate, so that the oil is uniformly filled into each target gap in cooperation with the fixed grease injection positions of the upper, middle, and lower grease injection heads.After the grease injection is completed, the rotary drive assembly 800 stops working, the fourth cylinder 720 drives the rotary platform 120 to descend to the initial position again, and the conveying mechanism 200 conveys the bearing after the grease injection back to the non-processing area, completing a single operation. The device uniformly lubricates through multi-directional grease injection in the upper, middle and lower positions in cooperation with the rotary action, can accurately cover all parts of the bearing that need to be lubricated, completely avoids the blind area of the traditional grease injection method, and ensures that the grease is filled uniformly and fully. At the same time, the whole process is automatically operated, without manual turning or secondary grease injection, greatly shortening the grease injection time of a single bearing, significantly improving the production efficiency, reducing the error caused by manual intervention, reducing the labor cost and operation risk, and completely adapting to the large-scale batch production demand of double-row tapered roller bearings.

[0058] As shown in Figures 2-4 The first lifting assembly 500 further includes a fixed support 530, a first movable support 531, a second movable support 532 and a connecting rod 533. The first movable support 531 is located directly above the fixed support 530, and the second movable support 532 is located directly below the fixed support 530. The second cylinder 520 is fixed to the first movable support 531, and the piston rod of the second cylinder 520 is fixedly connected to the fixed support 530. One end of the connecting rod 533 is fixedly connected to the first movable support 531, and the other end is fixedly connected to the middle grease injection head 400. The first cylinder 510 is fixed to the fixed support 530, and the piston rod of the first cylinder 510 is fixedly connected to the second movable support 532. The side of the second movable support 532 away from the first cylinder 510 is fixedly connected to the upper grease injection head 300. Further reference to Figure 4The first lifting assembly 500 further comprises a first guide rod 534, one end of the first guide rod 534 is fixedly connected with the second movable support 532, and the other end sequentially penetrates through the fixed support 530 and the first movable support 531; the fixed support 530 is fixedly provided with a first linear bearing 535, the first movable support 531 is fixedly provided with a second linear bearing 536, and the first guide rod 534 is slidably connected with the first linear bearing 535 and the second linear bearing 536 respectively; the fixed support 530 is further fixedly provided with a third linear bearing 537, and the connecting rod 533 is slidably connected with the third linear bearing 537. In work, the first lifting assembly 500 takes the fixed support 530 as a core reference, when the middle grease injection head 400 is driven to lift, the second cylinder 520 fixed to the first movable support 531 drives force through the piston rod extension and contraction, specifically, when the piston rod of the second cylinder 520 extends, the second cylinder 520 drives the first movable support 531 to move upwards, the connecting rod 533 fixed with the first movable support 531 moves synchronously, drives the middle grease injection head 400 to rise, and the connecting rod 533 stably slides along the third linear bearing 537 on the fixed support 530, and when the piston rod of the second cylinder 520 retracts, the first movable support 531 moves downwards, and the connecting rod 533 drives the middle grease injection head 400 to descend. When the upper grease injection head 300 is driven to lift, the first cylinder 510 fixed to the fixed support 530 acts on the second movable support 532 through the piston rod extension and contraction, specifically, the piston rod of the first cylinder 510 retracts to drive the second movable support 532 to move upwards, directly drives the upper grease injection head 300 to rise, the piston rod extends to drive the second movable support 532 to move downwards, synchronously drives the upper grease injection head 300 to descend, and the first guide rod 534 fixed with the second movable support 532 stably slides through the first linear bearing 535 on the fixed support 530 and the second linear bearing 536 on the first movable support 531 in sequence. The structure design not only realizes independent and accurate lifting of the upper grease injection head 300 and the middle grease injection head 400 without interference to adapt to different working conditions of grease injection demand, but also further limits the movement deviation of components through cooperation of the first guide rod 534 and each linear bearing and cooperation of the connecting rod 533 and the third linear bearing 537, ensures high stability and accuracy of the lifting action, effectively improves the grease injection operation efficiency, greatly reduces the operation error caused by shaking or uncoordinated action of components, simultaneously reduces the friction loss between components, prolongs the overall service life of the assembly.

[0059] As Figures 3-5As shown, the middle grease injection head 400 includes a grease distribution connector 410 and a grease outlet seat 420, one side of the grease distribution connector 410 is fixedly connected with the connecting rod 533, the other side is fixedly connected with the grease outlet seat 420, the circumferential direction of the grease outlet seat 420 is provided with a plurality of interval distributed grease injection nozzles 421, the inside of the connecting rod 533 is formed with a main grease inlet channel 5330, the inside of the grease distribution connector 410 is formed with a plurality of branch grease inlet channels, one end of the plurality of branch grease inlet channels is respectively communicated with the main grease inlet channel 5330, the other end of the plurality of branch grease inlet channels is respectively communicated with the plurality of grease injection nozzles 421 one by one. When the grease is delivered, the external grease source first enters the main grease inlet channel 5330 inside the connecting rod 533, then is branched through the plurality of branch grease inlet channels inside the grease distribution connector 410, and finally the grease is synchronously delivered to the target position through the plurality of grease injection nozzles 421. The structure design not only realizes uniform distribution of the grease through the branch channels of the grease distribution connector, but also enables the plurality of grease injection nozzles to simultaneously complete the grease injection operation, greatly improving the grease injection efficiency.

[0060] As shown in Figure 2 , the upper grease injection head 300 and the lower grease injection head 600 are symmetrically arranged about the horizontal plane. Specifically, referring to Figure 5 , a plurality of first protrusions 310 in annular distribution are protruded on the side of the upper grease injection head 300 facing the workbench 100, the plurality of first protrusions 310 can be inserted into the gap between the plurality of first rollers 13 one by one, and a first grease injection port 311 is arranged at the tooth tip of the first protrusion 310. Referring to Figure 9The side of the lower grease head 600 facing the workbench 100 is provided with a plurality of second protrusions 610 arranged in a ring shape. The plurality of second protrusions 610 can be inserted into the gaps between the plurality of second rollers 14 one by one. The second protrusions 610 are provided with second grease injection ports 611 at the tooth tips. The upper grease head 300 and the lower grease head 600 are arranged symmetrically about the horizontal plane around the workbench 100, ensuring that the grease injection requirements of the workbench can be met synchronously from the upper and lower directions. For the upper grease head 300, the side facing the workbench 100 is provided with a plurality of first protrusions 310 arranged in a ring shape. During operation, the first protrusions 310 can be precisely and one by one inserted into the gaps between the plurality of first rollers 13 on the workbench 100. The first grease injection ports 311 at the tooth tips of the first protrusions 310 can be directly aligned with the lubrication points of the first rollers 13, achieving precise grease delivery. Correspondingly, the side of the lower grease head 600 facing the workbench 100 is also provided with a plurality of second protrusions 610 arranged in a ring shape. In the working state, the second protrusions 610 can be one by one inserted into the gaps between the plurality of second rollers 14 on the workbench 100. The second grease injection ports 611 at the tooth tips of the second protrusions 610 can be precisely aligned with the lubrication positions of the second rollers 14 to complete grease injection. This symmetrical design not only allows the upper and lower grease heads to directly inject grease on both sides of the double-row bearing 1, eliminating the need to flip the double-row bearing 1, greatly shortening the overall grease injection cycle and improving operation efficiency. It also ensures that the grease injection ports can be precisely fitted to the lubrication points through the one by one matching of the ring-shaped protrusions and the roller gaps, avoiding grease waste.

[0061] As shown in Figure 2 , Figure 6 and Figure 7 , the second lifting assembly 700 includes a fixed bottom plate 740, a fixed upper plate 741, a fixed rod 742, a movable plate 743, a transmission rod 744, and a floating joint 745. The top of the fixed rod 742 is fixedly connected with the workbench 100, the bottom of the fixed rod 742 is fixedly connected with the fixed bottom plate 740, the fixed upper plate 741 is fixedly connected with the fixed rod 742 and located between the workbench 100 and the fixed bottom plate 740, and the movable plate 743 is movably arranged between the fixed bottom plate 740 and the fixed upper plate 741. The third cylinder 710 is fixed on the movable plate 743, and the piston rod of the third cylinder 710 is fixedly connected with the fixed bottom plate 740. The fourth cylinder 720 is fixed on the movable plate 743, the floating joint 745 is rotatably connected to the end of the piston rod of the fourth cylinder 720, and the floating joint 745 is fixedly connected with the end of the transmission rod 744. The end of the transmission rod 744 away from the floating joint 745 is fixedly connected with the rotating platform 120. The fifth cylinder 730 is fixed on the fixed upper plate 741, and the piston rod of the fifth cylinder 730 is fixedly connected with the lower grease head 600. Further reference is made to Figure 7 and Figure 8The second lifting assembly 700 further comprises a second guide rod 746, a fourth linear bearing 747 and a fifth linear bearing 748, the fourth linear bearing 747 is fixedly connected with the movable plate 743, the fifth linear bearing 748 is fixedly connected with the lower lubricating head 600, the bottom end of the second guide rod 746 is fixedly connected with the fixed bottom plate 740, and the second guide rod 746 is slidingly connected with the fourth linear bearing 747 and the fifth linear bearing 748 respectively. The fixed upper plate 741 is fixedly provided with a bearing seat 750, the outer side of the transmission rod 744 is sleeved with a rod sleeve 760, the rod sleeve 760 and the bearing seat 750 are fixedly connected through a deep groove ball bearing 770, a plurality of keys 7440 are protruded in the circumferential direction of the transmission rod 744, and a plurality of first matching grooves 7600 for accommodating the keys 7440 are concave in the inner circumferential wall of the rod sleeve 760. Further Figure 8, the rotating driving assembly 800 comprises a motor 810, a driving wheel 820, a driven wheel 830 and a synchronous belt 840, the driving wheel 820 is fixed on the rotating shaft of the motor 810, the driven wheel 830 is in transmission connection with the driving wheel 820 through the synchronous belt 840, the driven wheel 830 is sleeved outside the transmission rod 744, the driven wheel 830 is coaxially fixedly connected with the rod sleeve 760, and a plurality of second matching grooves 8300 for accommodating the keys 7440 are formed in the inner circumferential wall of the driven wheel 830; wherein the keys 7440 are in sliding connection with the first matching grooves 7600 and the second matching grooves 8300 respectively. When working, the second lifting assembly 700 is based on the frame formed by the fixed bottom plate 740, the fixed upper plate 741 and the fixed rod 742, the fixed rod 742 connects the workbench 100 and the fixed bottom plate 740, the fixed upper plate 741 is fixed in the middle of the fixed rod 742, the movable plate 743 is in sliding connection with the second guide rod 746 through the fourth linear bearing 747 and can move between the fixed bottom plate 740 and the fixed upper plate 741. The third cylinder 710 and the fourth cylinder 720 can independently drive the rotating platform 120 to lift, specifically, because the piston rod of the third cylinder 710 is fixed with the fixed bottom plate 740, when the piston rod of the third cylinder 710 is retracted, the movable plate 743 will be lifted along the second guide rod 746, when the second guide rod 746 is lifted, the fourth cylinder 720 will be lifted (at this time, the fourth cylinder 720 is in an inaction state), and then the piston rod of the fourth cylinder 720, the floating joint 745 and the transmission rod 744 are synchronously lifted, and finally the transmission rod 744 drives the rotating platform 120 to lift. When the fourth cylinder 720 is started, the piston rod of the fourth cylinder 720 will be retracted, the piston rod of the fourth cylinder 720 will drive the floating joint 745 and the transmission rod 744 to synchronously lift, and finally the transmission rod 744 drives the rotating platform 120 to lift. It is worth noting that when the transmission rod 744 is lifted, the keys 7440 of the transmission rod 744 can slide up and down in the first matching grooves 7600 of the rod sleeve 760. When the rotating platform 120 needs to rotate, the motor 810 is started to drive the driving wheel 820 to rotate, which is transmitted to the driven wheel 830 through the synchronous belt 840, since the driven wheel 830 is coaxially fixed with the rod sleeve 760, and the second matching grooves 8300 of the driven wheel 830 cooperate with the keys 7440 of the transmission rod 744, when the driven wheel 830 rotates, the transmission rod 744 will be driven to rotate, and then the rotating platform 120 is driven to rotate. It is worth noting that the end of the transmission rod 744 is connected with the floating joint 745, and the end of the piston rod of the fourth cylinder 720 is rotatably connected with the floating joint 745, therefore, when the transmission rod 744 rotates, only the floating joint 745 will be driven to rotate, and the piston rod of the fourth cylinder 720 will not rotate. When the piston rod of the fifth cylinder 730 is retracted, the grease injection head 600 is lifted along the axis direction of the second guide rod 746 through the fifth linear bearing 748, so as to realize the position adjustment of the grease injection head 600.The structure design, on the one hand, through the cooperation of the second guide rod 746 and each linear bearing, ensures the stable lifting of the movable plate 743 and the lower grease injection head 600, and avoids deviation; on the other hand, the matching groove of the key 7440 of the transmission rod 744, the sleeve 760 and the driven wheel 830, realizes the independence and cooperation of the lifting and rotating actions, meets the rotating demand of the rotating platform 120, and does not affect the lifting of the transmission rod 744; at the same time, the deep groove ball bearing 770 reduces the rotating friction of the sleeve 760, and the synchronous belt 840 transmission ensures the stable transmission of the rotating power, improves the operation efficiency and quality, and ensures the accurate injection position of the lower grease injection head 600 and the reliable operation of the rotating platform 120.

[0062] As shown in Figure 1 , the conveying mechanism 200 comprises a single-axis motion module 210, a moving block 220, a connecting block 230, a first pushing claw 240 and a second pushing claw 250. The moving block 220 is fixedly connected with a sliding block 2100 on the single-axis motion module 210. The connecting block 230 is fixedly connected with the moving block 220. The first pushing claw 240 and the second pushing claw 250 are respectively fixedly connected with the connecting block 230, and are located above the workbench 100 to push the double-row bearing 1. Specifically, the first pushing claw 240 is used to push the double-row bearing 1 from the non-processing area to the processing area, and the second pushing claw 250 is used to push the double-row bearing 1 from the processing area to the non-processing area.

[0063] Further, referring to Figure 3 and Figure 9 , the grease injection device further comprises a first sensor 910 and a second sensor 920. The first sensor 910 is fixed on the fixed support 530 and is used to detect the position of the gap between the plurality of first rollers 13, so as to ensure that the gap between the plurality of first rollers 13 is aligned with the plurality of first teeth 310, and avoid damage caused by the impact of the first teeth 310 on the first rollers 13. The second sensor 920 is fixed on the fixed upper plate 741 and is used to detect the gap between the plurality of second rollers 14, so as to ensure that the gap between the plurality of second rollers 14 is aligned with the plurality of second teeth 610, and avoid damage caused by the impact of the second teeth 610 on the second rollers 14.

[0064] As shown in Figure 10 , the application also provides a grease injection method of a double-row bearing grease injection device, comprising the following steps:

[0065] S1: preparing materials: placing the double-row bearing 1 to be injected with grease in the non-processing area of the workbench 100.

[0066] S2: material transfer to the processing area: the conveying mechanism 200 pushes the double-row bearing 1 located in the non-processing area to the processing area of the workbench 100, so that the support platform 110 supports the outer ring 10 of the double-row bearing 1, and the rotating platform 120 supports the second inner ring 12 of the double-row bearing 1; at this time, the rotating platform 120 is located at the initial position, and the upper surface of the rotating platform 120 is coplanar with the upper surface of the support platform 110.

[0067] S3: expose the middle seam: the third cylinder 710 drives the rotating platform 120 to descend, and the rotating platform 120 drives the second inner ring 12 of the double-row bearing 1 to descend to expose the middle seam 15 between the first inner ring 11 and the second inner ring 12.

[0068] S4: grease injection by the middle grease injection head and the upper grease injection head: the second cylinder 520 drives the middle grease injection head 400 to descend to the middle seam 15, and the middle grease injection head 400 injects grease to the middle seam 15, then the first cylinder 510 drives the upper grease injection head 300 to descend, and the upper grease injection head 300 injects grease to the gap between the plurality of first rollers 13, after the middle grease injection head 400 and the upper grease injection head 300 finish injecting grease, the first cylinder 510 first drives the upper grease injection head 300 to ascend to the initial position, then the second cylinder 520 again drives the middle grease injection head 400 to ascend to the initial position, and finally the third cylinder 710 again drives the rotating platform 120 to ascend to the initial position.

[0069] S5: grease injection by the lower grease injection head: the fifth cylinder 730 drives the lower grease injection head 600 to ascend, and the lower grease injection head 600 injects grease to the gap between the plurality of second rollers 14, after the grease injection is finished, the fifth cylinder 730 again drives the lower grease injection head 600 to descend to the initial position.

[0070] S6: grease uniformization: the fourth cylinder 720 drives the rotating platform 120 to ascend and in turn drives the second inner ring 12 to ascend, and the rotating drive assembly 800 drives the rotating platform 120 to rotate and in turn drives the second inner ring 12 to rotate for grease uniformization, after the grease uniformization is finished, the rotating drive assembly 800 stops working, and the fourth cylinder 720 again drives the rotating platform 120 to descend to the initial position.

[0071] S7: material transfer to the non-processing area: the conveying mechanism 200 pushes the double-row bearing 1 after the grease injection is finished to the non-processing area of the workbench 100.

[0072] The above-described embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A double row bearing grease injection device, the double row bearing (1) comprising an outer ring (10), a first inner ring (11), a second inner ring (12), a plurality of first rollers (13) located between the outer ring (10) and the first inner ring (11), and a plurality of second rollers (14) located between the outer ring (10) and the second inner ring (12); characterized in that the grease injection device comprising: a workbench (100) having a processing area and a non-processing area; the workbench (100) comprising a support platform (110) located in the processing area for supporting the outer ring (10), and a rotating platform (120) for supporting the second inner ring (12) of the double row bearing (1); a conveying mechanism (200) for driving the double row bearing (1) to move between the processing area and the non-processing area; an upper grease injection head (300) located directly above the processing area for injecting grease into the gap between the plurality of first rollers (13); a middle grease injection head (400) located directly above the processing area for injecting grease into the middle gap (15) located between the first inner ring (11) and the second inner ring (12); a first lifting assembly (500) comprising a first air cylinder (510) for driving the upper grease injection head (300) to move up and down, and a second air cylinder (520) for driving the middle grease injection head (400) to move up and down; a lower grease injection head (600) located directly below the processing area for injecting grease into the gap between the plurality of second rollers (14); a second lifting assembly (700) comprising a third air cylinder (710), a fourth air cylinder (720) and a fifth air cylinder (730), the third air cylinder (710) and the fourth air cylinder (720) being respectively used for driving the rotating platform (120) to move up and down, and the fifth air cylinder (730) being used for driving the lower grease injection head (600) to move up and down; a rotating drive assembly (800) for driving the rotating platform (120) to rotate.

2. The grease injection apparatus of claim 1, wherein The first lifting assembly (500) further comprises a fixed support (530), a first movable support (531), a second movable support (532) and a connecting rod (533), the first movable support (531) being located directly above the fixed support (530), and the second movable support (532) being located directly below the fixed support (530). The second cylinder (520) is fixed on the first movable support (531), and the piston rod of the second cylinder (520) is fixedly connected with the fixed support (530), one end of the connecting rod (533) is fixedly connected with the first movable support (531), and the other end is fixedly connected with the middle grease injection head (400); The first cylinder (510) is fixed on the fixed support (530), and the piston rod of the first cylinder (510) is fixedly connected with the second movable support (532), and the side, away from the first cylinder (510), of the second movable support (532) is fixedly connected with the upper grease injection head (300).

3. The grease injection apparatus of claim 2, wherein The first lifting assembly (500) further comprises a first guide rod (534), one end of the first guide rod (534) is fixedly connected with the second movable support (532), and the other end sequentially passes through the fixed support (530) and the first movable support (531); A first linear bearing (535) is fixed on the fixed support (530), a second linear bearing (536) is fixed on the first movable support (531), and the first guide rod (534) is slidably connected with the first linear bearing (535) and the second linear bearing (536) respectively; A third linear bearing (537) is further fixed on the fixed support (530), and the connecting rod (533) is slidably connected with the third linear bearing (537).

4. The grease injection apparatus of claim 2, wherein The middle grease injection head (400) comprises a grease distribution connector (410) and a grease outlet seat (420), one side of the grease distribution connector (410) is fixedly connected with the connecting rod (533), and the other side is fixedly connected with the grease outlet seat (420), a plurality of interval distributed grease injection nozzles (421) are arranged in the circumferential direction of the grease outlet seat (420), an inlet main flow channel (5330) is formed in the connecting rod (533), a plurality of inlet branch flow channels are formed in the grease distribution connector (410), one end of each of the plurality of inlet branch flow channels is in communication with the inlet main flow channel (5330), and the other end of each of the plurality of inlet branch flow channels is in one-to-one correspondence with the plurality of grease injection nozzles (421).

5. The grease injection apparatus of claim 1, wherein The upper grease injection head (300) and the lower grease injection head (600) are symmetrically arranged about a horizontal plane; A plurality of annularly distributed first protrusions (310) are protruded on the side of the upper grease injection head (300) facing the workbench (100), the plurality of first protrusions (310) can be inserted into the gaps between the plurality of first rollers (13) in one-to-one correspondence, and a first grease injection port (311) is arranged at the tooth tip of the first protrusion (310); A plurality of annularly distributed second protrusions (610) are protruded on the side of the lower grease injection head (600) facing the workbench (100), the plurality of second protrusions (610) can be inserted into the gaps between the plurality of second rollers (14) in one-to-one correspondence, and a second grease injection port (611) is arranged at the tooth tip of the second protrusion (610).

6. The grease injection apparatus of claim 1, wherein The second lifting assembly (700) comprises a fixed bottom plate (740), a fixed upper plate (741), a fixed rod (742), a movable plate (743), a transmission rod (744) and a floating joint (745), the top of the fixed rod (742) is fixedly connected with the workbench (100), the bottom of the fixed rod (742) is fixedly connected with the fixed bottom plate (740), the fixed upper plate (741) is fixedly connected with the fixed rod (742) and located between the workbench (100) and the fixed bottom plate (740), and the movable plate (743) is movably arranged between the fixed bottom plate (740) and the fixed upper plate (741); The third cylinder (710) is fixed on the movable plate (743), and the piston rod of the third cylinder (710) is fixedly connected with the fixed bottom plate (740); The fourth cylinder (720) is fixed on the movable plate (743), the floating joint (745) is rotatably connected to the end of the piston rod of the fourth cylinder (720), and the floating joint (745) is fixedly connected with the end of the transmission rod (744), and the end, away from the floating joint (745), of the transmission rod (744) is fixedly connected with the rotary platform (120); The fifth cylinder (730) is fixed on the fixed upper plate (741), and the piston rod of the fifth cylinder (730) is fixedly connected with the grease injection head (600).

7. The grease injection apparatus of claim 6, wherein The second lifting assembly (700) further comprises a second guide rod (746), a fourth linear bearing (747) and a fifth linear bearing (748), the fourth linear bearing (747) is fixedly connected with the movable plate (743), the fifth linear bearing (748) is fixedly connected with the grease injection head (600), the bottom end of the second guide rod (746) is fixedly connected with the fixed bottom plate (740), and the second guide rod (746) is slidably connected with the fourth linear bearing (747) and the fifth linear bearing (748) respectively.

8. The grease injection apparatus of claim 6, wherein The fixed upper plate (741) is fixedly connected with a bearing seat (750), the transmission rod (744) is sleeved with a rod sleeve (760) outside, the rod sleeve (760) and the bearing seat (750) are fixedly connected through a deep groove ball bearing (770), a plurality of protruding keys (7440) are arranged in the circumferential direction of the transmission rod (744), and a plurality of first matching grooves (7600) for accommodating the protruding keys (7440) are arranged in the inner circumferential wall of the rod sleeve (760); The rotating driving assembly (800) comprises a motor (810), a driving wheel (820), a driven wheel (830) and a synchronous belt (840), the driving wheel (820) is fixed on the rotating shaft of the motor (810), the driven wheel (830) is in driving connection with the driving wheel (820) through the synchronous belt (840), the driven wheel (830) is sleeved outside the transmission rod (744), the driven wheel (830) is coaxially fixedly connected with the rod sleeve (760), and a plurality of second matching grooves (8300) for accommodating the protruding keys (7440) are formed in the inner circumferential wall of the driven wheel (830); The protruding keys (7440) are in sliding connection with the first matching grooves (7600) and the second matching grooves (8300) respectively.

9. The grease injection apparatus of claim 7, wherein The conveying mechanism (200) comprises a single-shaft movement module (210), a moving block (220), a connecting block (230), a first pushing claw (240) and a second pushing claw (250), the moving block (220) is fixedly connected with a sliding block (2100) on the single-shaft movement module (210), the connecting block (230) is fixedly connected with the moving block (220), the first pushing claw (240) and the second pushing claw (250) are fixedly connected with the connecting block (230) respectively, and the first pushing claw (240) and the second pushing claw (250) are located above the workbench (100) to push the double-row bearing (1).

10. A method of injecting grease into a double-row bearing assembly as set forth in any one of claims 1-9, wherein, The method comprises the following steps: Preparation of materials: placing the double-row bearing (1) to be injected with grease in the non-processing area of the workbench (100); Material transfer to the processing area: the conveying mechanism (200) pushes the double-row bearing (1) located in the non-processing area to the processing area of the workbench (100), so that the support platform (110) supports the outer ring (10) of the double-row bearing (1), and the rotating platform (120) supports the second inner ring (12) of the double-row bearing (1); at this time, the rotating platform (120) is located at the initial position, and the upper surface of the rotating platform (120) is coplanar with the upper surface of the support platform (110); Exposing the middle seam: the third cylinder (710) drives the rotating platform (120) to descend, and the rotating platform (120) drives the second inner ring (12) of the double-row bearing (1) to descend to expose the middle seam (15) between the first inner ring (11) and the second inner ring (12); The middle grease injection head and the upper grease injection head inject grease: the second air cylinder (520) drives the middle grease injection head (400) to descend to the middle joint (15), the middle grease injection head (400) injects grease to the middle joint (15), then the first air cylinder (510) drives the upper grease injection head (300) to descend, the upper grease injection head (300) injects grease to the gap between the plurality of first rollers (13), after the middle grease injection head (400) and the upper grease injection head (300) finish injecting grease, the first air cylinder (510) first drives the upper grease injection head (300) to ascend to the initial position, then the second air cylinder (520) again drives the middle grease injection head (400) to ascend to the initial position, finally the third air cylinder (710) again drives the rotating platform (120) to ascend to the initial position; The lower grease injection head injects grease: the fifth air cylinder (730) drives the lower grease injection head (600) to ascend, the lower grease injection head (600) injects grease to the gap between the plurality of second rollers (14), after injecting grease, the fifth air cylinder (730) again drives the lower grease injection head (600) to descend to the initial position; Grease uniformization: the fourth air cylinder (720) drives the rotating platform (120) to ascend and in turn drives the second inner ring (12) to ascend, the rotating driving assembly (800) drives the rotating platform (120) to rotate and in turn drives the second inner ring (12) to rotate to uniformize the grease, after uniformizing the grease, the rotating driving assembly (800) stops working, the fourth air cylinder (720) again drives the rotating platform (120) to descend to the initial position; Material transfer to the non-processing area: the conveying mechanism (200) pushes the double row bearing (1) after injecting grease to the non-processing area of the workbench (100).

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