Planetary roller pin arranging machine

Abstract

The invention belongs to the technical field of automatic part sorting and automatic assembly, and particularly relates to a planetary roller pin arranging machine which comprises a machine base, a motor, a connecting rod mechanism, a center shaft, a cover, a roller pin discharging disc, a lifting mechanism, a guide rail sliding block, a hammer, a moving table, a bearing, a disc, a poke rod, roller pins and planetary gears. The machine base is fixed to the tool table, the motor shell is fixed to the machine base, the output end of the machine base drives the center shaft to rotate through the connecting rod mechanism, and the connecting rod mechanism is a double-rocker four-rod mechanism. According to the invention, the total number of the arranged roller pins can be accurately controlled, the condition of product reworking caused by insufficient roller pins in the prior art is avoided, the yield and the production efficiency are improved, the time for the roller pins to fall into the cylindrical cavity is reduced, the production efficiency is further improved, and the automation of the assembly process is conveniently realized.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic sorting and automatic assembly of parts, and particularly relates to a planetary needle arranging machine. Background Art

[0002] In a planetary gear transmission mechanism, when its volume becomes smaller and more compact, in order not to reduce the transmission strength, the originally installed needle bearing is generally cancelled, and the needles are directly inserted into the planetary gear to act as a bearing. This not only saves the space occupied by the original bearing cage but also does not reduce its transmission strength.

[0003] The existing needle assembly of planetary gears usually adopts a manual filling method, that is, lubricating grease is first applied to the inner wall of the planetary gear. The lubricating grease is used to keep the needles attached to the inner wall of the planetary gear without falling off, and then the needles are manually inserted into the inner wall of the planetary gear in sequence, and the needles are arranged in a ring along the inner wall of the planetary gear. This manual filling method consumes a large amount of manpower and material resources, not only has low work efficiency and cannot meet the current market demand, but also is prone to the situation of missing needles, seriously affecting the product quality and the enterprise's benefits. Summary of the Invention

[0004] Based on the technical problem of low needle filling efficiency, the present invention proposes a planetary needle arranging machine.

[0005] A planetary needle arranging machine proposed by the present invention includes a machine base, a motor, a link mechanism, a central shaft, a cover, a needle feeding tray, a lifting mechanism, a guide rail slider, a hammer, a moving table, a bearing, a disk, a shifting rod, needles, and a planetary gear. The machine base is fixed on the tooling table, the motor housing is fixed on the machine base, and the output end of the machine base drives the central shaft to rotate through the link mechanism. The link mechanism is a double-rocker four-bar mechanism.

[0006] The link mechanism includes a motor rocker, a link, an end rocker, and a machine base. One end of the motor rocker is fixedly connected to the motor output shaft, the other end of the motor rocker forms a rotating pair with one end of the link, one end of the end rocker is fixedly connected to the upper end of the central shaft, the other end of the end rocker forms a spherical pair with the other end of the link, and the central shaft forms a rotating pair with the machine base through a bearing.

[0007] The machine base, the cover, and the needle feeding tray are relatively fixed. The central shaft is located on the central axis of the needle feeding tray. The upper end of the needle feeding tray has an inverted conical cavity. A disk is fixedly installed in the middle of the central shaft. The disk divides the inverted conical cavity into two frustum spaces. Three shifting rods are fixedly installed through the disk. The spatial directions of the three shifting rods are close to parallel to the generatrix of the inverted conical cavity.

[0008] The stationary end of the lifting mechanism is connected to the machine base. The moving end of the lifting mechanism is connected to the moving table through a guide rail slider. The stationary end and the moving end form a scissor lift mechanism through a scissor link. The moving end is equipped with a horizontal travel limit block. The lifting knob is used for lifting, and the locking knob is used for locking the lifting position. The moving table can move within a certain distance in the horizontal direction. The limit for the forward movement of the moving table is the machine base, and the limit for the backward movement of the moving table is the horizontal travel limit block. The moving table has a hammer-shaped groove that can be used to place a hammer;

[0009] The upper plane of the hammer is flush with the upper plane of the moving table. The hammer includes a handle, a hammer head, and a hammer core. The hammer core has a stepped shaft shape. The hammer head is cylindrical and contains a stepped hole inside. The threaded head of the handle is locked with the side threaded hole of the hammer head. The pin shaft at the head of the handle has a clearance fit with the side keyway of the hammer core to form a linear lifting motion and limit. The large hole of the hammer head and the large hole of the hammer core form a linear motion cylindrical pair, and the hammer core can move linearly up and down relative to the hammer head.

[0010] Preferably, the tooling table is made of sheet metal and has a certain flexibility. The movement of the double-rocker four-bar mechanism will cause shaking, resulting in an exciting force on the planetary needle aligning machine and the needles inside.

[0011] Preferably, the small hole of the hammer head, the small diameter shaft of the hammer core, and the shoulder of the hammer core form an annular concave cavity that can hold a set of needles.

[0012] Preferably, the clearance between the cylindrical cavity of the needle feeding tray, the lower end of the central shaft, and the needles in the horizontal direction is 0.01 mm.

[0013] Preferably, the lifting mechanism is in the form of a scissor lift. The stationary end and the moving end of the lifting mechanism can adjust the height of the moving table within a certain height range. The working distance between the upper surface of the moving table and the cylindrical cavity and the lower end of the central shaft is preferably 0.1 mm. The lifting mechanism is used to handle needles with abnormal lengths.

[0014] Preferably, apply an appropriate amount of grease to the inner hole of the planetary gear. Align the inner hole of the planetary gear with the small hole of the hammer head. Push the hammer core from the large hole of the hammer core with your finger. A set of needles will enter the inner hole of the planetary gear through the annular cavity and be stuck by the grease.

[0015] The present invention also proposes a method for using a planetary needle aligning machine, including the following steps:

[0016] Step 1: The funnel adds a certain amount of needles into the injection hole of the cover. The preferred number of a certain amount of needles is two-thirds of the volume;

[0017] Step 2: Under the actions of the shaking, gravity, rotation of the central shaft, rotation of the disk, rotation of the toggling rod, and various mutual frictional forces and collision forces of the needle rollers in the planetary needle roller aligning machine, two layers will be arranged on the upper surface of the moving table and in the cylindrical cavity of the needle roller feeding tray and the annular groove space at the lower end of the central shaft. Moreover, the first layer is a full-needle arrangement. The contact surface below the first layer of needle rollers is larger than the contact area between the first layer of needle rollers and the second layer of needle rollers, and thus the frictional force is greater. The movement speed of the first layer of needle rollers around the central shaft is slower than that of the second layer of needle rollers. Therefore, the second layer of needle rollers has a probability trend of filling the gaps between the needle rollers in the first layer;

[0018] Step 3: After the hammer is placed in the profiling space on the moving table, the hammer and the moving table are manually operated. The moving table contacts the horizontal stroke limit block, and when the moving table reaches the contact position with the machine base, an annular concave cavity is formed between the hammer head and the hammer core to receive the needle rollers in the [layer];

[0019] Step 4: The hammer and the moving table are manually operated. The moving table moves from the contact position with the machine base to the contact with the horizontal stroke limit block, and the hammer is taken out from the profiling space on the moving table;

[0020] Step 5: Apply an appropriate amount of lubricating grease to the inner hole of the planetary gear;

[0021] Step 6: Align the inner hole of the planetary gear with the small hole of the hammer head. Push the hammer core from the large hole of the hammer core with a finger. A set of needle rollers received by the annular cavity will enter the inner hole of the planetary gear and be adhered by the lubricating grease in the inner hole of the planetary gear.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. Through the vibration, mechanism rotation, friction, and collision forces of the double-rocker mechanism, the total number of needle rollers arranged can be accurately controlled, and the situation of product rework due to insufficient number of needle rollers in the prior art will not occur, improving the finished product rate and production efficiency;

[0024] 2. Through the vibration of the double-rocker mechanism, the central shaft generates jitter during rotation, reducing the time for the needle rollers to fall into the cylindrical cavity and further improving the production efficiency;

[0025] 3. With the hammer structure, the process that the needle roller bearing directly enters the inner hole of the planetary gear and is adhered by the lubricating grease further improves the production efficiency. At the same time, it is also convenient to realize the automation of the assembly process, and it is convenient for the lifting mechanism to take out the abnormally mixed needle rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a planetary needle roller aligning machine proposed by the present invention;

[0027] Figure 2 It is a schematic partial structural sectional view of a planetary needle roller aligning machine proposed by the present invention;

[0028] Figure 3 is Figure 2 Schematic diagram of the enlarged structure of part A in

[0029] Figure 4 is Figure 2 Schematic diagram of the enlarged structure of part B in

[0030] Figure 5 Schematic diagram of the hammer shaft structure of the air cushion of a planetary needle roller arrangement machine proposed by the present invention;

[0031] Figure 6 is Figure 5 Schematic diagram of the enlarged structure of part C in

[0032] In the figure:

[0033] 1. Machine base; 2. Motor;

[0034] 3. Linkage mechanism; 301. Motor rocker; 302. Connecting rod; 303. End rocker;

[0035] 4. Central axis;

[0036] 5. Cover; 501. Injection hole;

[0037] 6. Needle roller blanking disc; 601. Inverted conical cavity; 602. Cylindrical cavity;

[0038] 7. Lifting mechanism; 701. Stationary end; 702. Moving end; 703. Shear difference connecting rod; 704. Lifting knob; 705. Horizontal stroke limit block; 706. Locking knob;

[0039] 8. Guide rail slider;

[0040] 9. Hammer; 901. Handle; 902. Hammer head; 903. Hammer core; 904. Head thread; 905. Head pin shaft; 906. Side keyway; 907. Large hole; 908. Small diameter shaft; 909. Axle shoulder; 910. Small hole;

[0041] 10. Moving table; 11. Bearing; 12. Disc; 13. Poking rod; 14. Needle roller; 15. Planetary gear. Specific implementation mode

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0043] Refer to Figures 1-6, A planetary needle roller arrangement machine, comprising a machine base 1, a motor 2, a linkage mechanism 3, a central shaft 4, a cover 5, a needle roller feeding tray 6, a lifting mechanism 7, a guide rail slider 8, a hammer 9, a moving table 10, a bearing 11, a disc 12, a toggle lever 13, a needle roller 14 and a planetary gear 15. The machine base 1 is fixed on the tooling table, the outer shell of the motor 2 is fixed on the machine base 1, and the output end of the machine base 1 drives the central shaft 4 to rotate through the linkage mechanism 3. The linkage mechanism 3 is a double-rocker four-bar mechanism;

[0044] The linkage mechanism 3 includes a motor rocker 301, a connecting rod 302, an end rocker 303 and the machine base 1. One end of the motor rocker 301 is fixedly connected to the output shaft of the motor 2, and the other end of the motor rocker 301 forms a rotating pair with one end of the connecting rod 302. One end of the end rocker 303 is fixedly connected to the upper end of the central shaft 4, and the other end of the end rocker 303 forms a spherical pair with the other end of the connecting rod 302. The central shaft 4 forms a rotating pair with the machine base 1 through the bearing 11;

[0045] The machine base 1, the cover 5 and the needle roller feeding tray 6 are relatively fixed. The central shaft 4 is located on the central axis of the needle roller feeding tray 6. The upper end of the needle roller feeding tray 6 has an inverted conical cavity 601. A disc 12 is fixedly installed in the middle of the central shaft 4. The disc 12 divides the inverted conical cavity 601 into two frustum-shaped spaces. Three toggle levers 13 are fixedly installed through the disc 12. The spatial directions of the three toggle levers 13 are approximately parallel to the generatrix of the inverted conical cavity 601;

[0046] The stationary end 701 of the lifting mechanism 7 is connected to the machine base 1, and the moving end 702 of the lifting mechanism 7 is connected to the moving table 10 through the guide rail slider 8. The stationary end 701 and the moving end 702 form a scissor lift mechanism through the scissor link 703. The moving end 702 is provided with a horizontal stroke limit block 705. The lifting knob 704 is used for lifting, and the locking knob 706 is used for locking the lifting position. The moving table 10 can move within a certain distance in the horizontal direction. The limit for the forward movement of the moving table 10 is the machine base 1, and the limit for the backward movement of the moving table 10 is the horizontal stroke limit block 705. The moving table 10 is provided with a hammer-shaped groove for placing the hammer 9;

[0047] The upper plane of the hammer 9 is flush with the upper plane of the moving table 10. The hammer 9 includes a handle 901, a hammer head 902 and a hammer core 903. The hammer core 903 has a stepped shaft shape. The hammer head 902 is cylindrical and contains a stepped hole inside. The head thread 904 of the handle 901 is locked with the side threaded hole of the hammer head 902. The head pin shaft 905 of the handle 901 is in clearance fit with the side keyway 906 of the hammer core 903 to form a lifting linear motion and limit. The large hole 907 of the hammer head 902 forms a linear motion cylindrical pair with the large hole of the hammer core 903. The hammer core 903 can move up and down linearly relative to the hammer head 902.

[0048] Preferably, the tooling table is made of sheet metal and has a certain flexibility. The movement of the double-rocker four-bar mechanism will cause shaking, resulting in vibration of the planetary needle aligning machine and the needles 14 inside, generating an exciting force.

[0049] Preferably, the small hole 910 of the hammer head 902, the small-diameter shaft 908 of the hammer core 903, and the shaft shoulder 909 of the hammer core 903 form an annular concave cavity that can hold a set of needles 14.

[0050] Preferably, the clearance between the cylindrical cavity 602 of the needle feeding tray 6, the lower end of the central shaft 4 and the needles 14 in the horizontal direction is 0.01 mm.

[0051] Preferably, the lifting mechanism 7 is in the form of a scissor difference. The stationary end 701 and the moving end 702 of the lifting mechanism 7 can adjust the height of the moving table 10 within a certain height range. The working distance between the upper surface of the moving table 10 and the cylindrical cavity 602 of the needle feeding tray 6 and the lower end of the central shaft 4 is preferably 0.1 mm. The lifting mechanism 7 is used to handle needles with abnormal lengths.

[0052] Preferably, apply an appropriate amount of lubricating grease to the inner hole of the planetary gear 15. Align the inner hole of the planetary gear 15 with the small hole 910 of the hammer head 902. Push the hammer core 903 from the large hole of the hammer core 903 with your finger. A set of needles 14 will enter the hole of the planetary gear 15 through the annular cavity and be adhered by the lubricating grease.

[0053] The present invention also provides a method for using the planetary needle aligning machine, including the following steps:

[0054] Step 1: The funnel adds a certain amount of needles 14 from the injection hole 501 of the cover 5. The number of a certain amount of needles 14 is preferably two-thirds of the volume.

[0055] Step 2: Under the action of shaking, gravity, rotation of the central shaft 4, rotation of the disk 12, rotation of the toggle rod 13, and various mutual frictional forces and collision forces of the needles 14 in the planetary needle aligning machine, the needles 14 will be arranged in two layers in the annular groove space between the upper surface of the moving table 10, the cylindrical cavity 602 of the needle feeding tray 6 and the lower end of the central shaft 4. And the first layer is a full-needle arrangement. The contact surface of the first layer of needles 14 below is larger than the contact area between the first layer of needles 14 and the second layer of needles, and thus the frictional force is greater. The movement speed of the first layer of needles 14 around the central shaft 4 is slower than that of the second layer of needles 14. Therefore, the second layer of needles 14 has a probability trend of inserting into the needles of the first layer of needles 14.

[0056] Step 3: After the hammer 9 is placed in the profiling space on the moving table 10, the hammer 9 and the moving table 10 are manually operated. The moving table contacts the horizontal stroke limit block 705 and moves to the contact position with the machine base 1. The hammer head 902 and the hammer core 903 form an annular concave cavity to hold the first layer of needles 14.

[0057] Step 4: Manually operate the hammer 9 and the moving table 10. The moving table 10 moves from the contact position with the machine base 1 to the contact with the horizontal stroke limit block 705, and the hammer 9 is taken out from the profiling space on the moving table 10.

[0058] Step 5: Apply an appropriate amount of grease to the inner hole of the planetary gear 15.

[0059] Step 6: Align the inner hole of the planetary gear 15 with the small hole 910 of the hammer head 902. Push the hammer core 903 from the large hole inside the hammer core 903 with fingers. A set of needle rollers 14 entering the inner hole of the planetary gear 15 will be received by the annular cavity and adhered by the grease in the inner hole of the planetary gear 15.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A planetary needle roller arrangement machine, comprising a machine base (1), a motor (2), a connecting rod mechanism (3), a central shaft (4), a cover (5), a needle roller unloading plate (6), a lifting mechanism (7), a guide rail slider (8), a hammer (9), a moving table (10), a bearing (11), a plate (12) and a toggle rod (13), a needle roller (14) and a planetary gear (15), characterized in that: The machine base (1) is fixed on a workbench, the housing of the motor (2) is fixed on the machine base (1), the output end of the machine base (1) drives the central shaft (4) to rotate through a connecting rod mechanism (3), and the connecting rod mechanism (3) is a double rocker four-bar mechanism; The connecting rod mechanism (3) comprises a motor rocker (301), a connecting rod (302), an end rocker (303) and a machine base (1); one end of the motor rocker (301) is fixedly connected to the output shaft of the motor (2); the other end of the motor rocker (301) forms a rotation pair with one end of the connecting rod (302); one end of the end rocker (303) is fixedly connected to the upper end of the central shaft (4); the other end of the end rocker (303) forms a ball pair with the other end of the connecting rod (302); and the central shaft (4) forms a rotation pair with the machine base (1) through a bearing (11); The machine base (1), the cover (5) and the needle feeding disc (6) are relatively fixed, the central axis (4) is located on the central axis of the needle feeding disc (6), the upper end of the needle feeding disc (6) has an inverted cone-shaped cavity (601), a disc (12) is fixed in the middle of the central axis (4), the disc (12) divides the inverted cone-shaped cavity (601) into two lower and two truncated cone spaces, three toggle rods (13) are fixed through the disc (12), and the spatial directions of the three toggle rods (13) are nearly parallel to the generatrix of the inverted cone-shaped cavity (601); The stationary end (701) of the lifting mechanism (7) is connected to the machine base (1), and the moving end (702) of the lifting mechanism (7) is connected to the moving platform (10) through a guide rail slider (8). The stationary end (701) and the moving end (702) form a scissor difference lifting mechanism through a scissor difference connecting rod (703). The moving end (702) includes a horizontal stroke limit block (705). The lifting knob (704) is used for lifting and lowering. The locking knob (706) is used for locking the lifting position. The moving platform (10) can move within a certain distance in the horizontal direction. The limit of the front movement of the moving platform (10) is the machine base (1), and the limit of the rear movement of the moving platform (10) is the horizontal stroke limit block (705). The moving platform (10) includes a hammer-shaped groove, which can be used to place a hammer (9); The upper plane of the hammer (9) is flush with the upper plane of the moving platform (10). The hammer (9) comprises a handle (901), a hammer head (902) and a hammer core (903). The hammer core (903) is in the shape of a stepped shaft. The hammer head (902) is cylindrical and contains a stepped hole. The head thread (904) of the handle (901) is locked with the side thread hole of the hammer head (902). The head pin (905) of the handle (901) and the side keyway (906) of the hammer core (903) are clearance-matched to form lifting linear motion and limit. The large hole (907) of the hammer head (902) and the large hole of the hammer core (903) form a linear motion cylindrical pair. The hammer core (903) can move up and down linear distance relative to the hammer head (902).

2. A planetary needle roller arrangement machine according to claim 1, characterized in that: The workbench is a sheet metal structure with a certain degree of flexibility. The movement of the double rocker four-bar mechanism will produce shaking, causing the planetary needle roller arrangement machine and the internal needle rollers (14) to vibrate and generate exciting force.

3. A planetary needle roller arrangement machine according to claim 1, characterized in that: The small hole (910) of the hammer head (902), the small diameter shaft (908) of the hammer core (903), and the shaft shoulder (909) of the hammer core (903) form an annular concave cavity that can receive a group of roller needles (14).

4. A planetary needle roller arrangement machine according to claim 1, characterized in that: The horizontal gap between the cylindrical cavity (602) of the needle roller unloading plate (6), the lower end of the central axis (4) and the needle roller (14) is 0.01 mm.

5. The planetary needle roller arrangement machine according to claim 1, characterized in that: The lifting mechanism (7) is in the form of a scissors difference. The stationary end (701) and the moving end (702) of the lifting mechanism (7) can adjust the height of the moving table (10) within a certain height range. The working distance between the upper surface of the moving table (10) and the cylindrical cavity (602) and the lower end of the central axis (4) is preferably 0.1 mm. The lifting mechanism (7) is used to process rollers with abnormal lengths.

6. A planetary needle roller arrangement machine according to claim 1, characterized in that: A proper amount of grease is applied to the inner hole of the planetary gear (15), and the inner hole of the planetary gear (15) is aligned with the small hole (910) of the hammer head (902). The hammer core (903) is pushed through the large hole of the hammer core (903) with a finger, and a group of roller needles (14) received in the annular cavity will enter the hole of the planetary gear (15) and be stuck by the grease.

7. A planetary needle roller arrangement machine according to any one of claims 1 to 6, characterized in that: The method for using the planetary needle roller arrangement machine comprises the following steps: Step 1: A certain amount of rolling needles (14) is added through the injection hole (501) of the cover (5) by a funnel, and the amount of the rolling needles (14) is preferably two-thirds of the volume; Step 2: The needle rollers (14) are arranged in two layers on the upper side of the moving table (10), in the annular groove space between the cylindrical cavity (602) of the needle roller unloading plate (6) and the lower end of the central axis (4) under the action of the shaking, gravity, rotation of the central axis (4), rotation of the disk (12), rotation of the toggle rod (13) and various mutual friction and collision forces in the planetary needle roller arrangement machine, and the first layer is a full needle arrangement, and the contact surface below the first layer of needle rollers (14) is larger than the contact area between the first layer of needle rollers (14) and the second layer of needle rollers, thereby the friction force is large; the speed of the first layer of needle rollers (14) moving around the central axis (4) is slower than that of the second layer of needle rollers (14), therefore, the second layer of needle rollers (14) has a probability trend of being filled with the needle rollers of the first layer (14); Step 3: After the hammer (9) is placed in the contoured space on the moving table (10), the hammer (9) and the moving table (10) are manually moved, the moving table (10) contacts the horizontal travel limit block (705), the moving table contacts the machine base (1), and the hammer head (902) and the hammer core (903) form an annular concave cavity to receive the first layer of roller needles (14); Step 4: The hammer (9) and the moving platform (10) are manually moved, the moving platform (10) moves from the contact position of the machine base (1) to the contact with the horizontal travel limit block (705), and the hammer (9) is taken out from the contour space on the moving platform (10); Step 5: Apply an appropriate amount of grease to the inner hole of the planetary gear (15); Step 6: Align the inner hole of the planetary gear (15) with the small hole (910) of the hammer head (902), and push the hammer core (903) through the large hole of the hammer core (903) with your finger. The annular cavity receives a group of roller needles (14) and enters the hole of the planetary gear (15) and is stuck by the grease of the inner hole of the planetary gear (15).

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