Rear guide servo six-claw self-centering mechanism in centerless lathe

Abstract

The utility model discloses a rear guide servo six-claw self-centering mechanism in a centerless lathe, which relates to the technical field of centerless lathes and comprises a flange plate, a worm gear is arranged in the flange plate, a worm is fittingly arranged on the worm gear, a planetary gear is arranged at one end of the worm, a servo motor is mounted on the planetary gear, and the other end of the worm is provided with a servo motor. An end baffle ring is detachably mounted outside the flange plate; a worm gear is arranged on the base, a wire disc is in threaded fit with the interior of the worm gear, a connecting sleeve is sleeved with the wire disc, a guide sleeve is sleeved with the connecting sleeve, at least one guide hole is formed in the circumference of the guide sleeve, and the guide sleeve is provided with a push rod mechanism used for clamping a workpiece in the guide sleeve through the guide hole; the torque output by the worm can be accurately controlled through the planetary gear accelerator and the servo motor, meanwhile, the worm and gear structure is utilized, machining is convenient, the self-locking performance and stability are good, the transmission ratio is large, the output torque is large, and operation is stable and durable.

Description

Technical Field

[0001] The utility model relates to the technical field of centerless lathes, in particular to a rear guide servo six-claw self-centering mechanism in a centerless lathe. Background Art

[0002] Planetary gear reducer is also called planetary reducer, servo reducer. In the reducer family, planetary reducer is widely used in servo motor, stepper motor, DC motor and other transmission systems due to its small size, high transmission efficiency, wide reduction range, high precision and many other advantages. Its function is to reduce the speed, increase the torque and reduce the load / motor moment of inertia ratio under the premise of ensuring precise transmission.

[0003] HMI is the abbreviation of Human Machine Interface. Human-machine interface (also known as user interface or user interface) is the medium for interaction and information exchange between the system and the user. It realizes the conversion between the internal form of information and the form acceptable to humans. Human-machine interface exists in all fields involving human-machine information exchange.

[0004] Centerless lathes are commonly known as peeling machines and peeling machines. They are mainly used to process metal cylindrical materials such as round steel, copper bars, titanium bars, etc. The reason why a centerless lathe is called a centerless lathe is that the center of the centerless lathe is empty, and there is a cutter disc around it. Fix the processed material, and then adjust the inclination angle of the cutter disc (the inclination angle determines the cutting depth, and the cutting is based on the actual needs of the customer). Press the button, and the cutter disc starts to perform high-speed rotating cutting motion.

[0005] The center and rear guide mechanism of the existing centerless lathe utilizes hydraulically driven gear racks. The outer ring of the gear has symmetrical curved spiral grooves. The curved spiral grooves need to be processed by a 4-axis or higher machining center. The processing is difficult. The spiral grooves have large resistance and are easy to wear during use. The conventional hydraulic valve is cumbersome and inaccurate to adjust the clamping force of the workpiece.

[0006] Therefore, there is an urgent need for a rear-guided servo six-claw self-centering mechanism in a centerless lathe to replace the gear rack and curved spiral groove to reduce the processing difficulty and improve the accuracy of the clamping force on the workpiece. Utility Model Content

[0007] In view of the above technical problems, the utility model provides a rear-guide servo six-claw self-centering mechanism in a centerless lathe, which is used to solve the problems of difficulty in machining curved spiral grooves and troublesome and inaccurate clamping force adjustment of conventional hydraulic valves on workpieces.

[0008] The above technical objectives of the utility model are achieved through the following technical solutions:

[0009] A rear guide servo six-claw self-centering mechanism in a centerless lathe, comprising a flange, a worm wheel is arranged inside the flange, a worm is matched on the worm wheel, a planetary gear reducer is arranged at one end of the worm, a servo motor is installed on the planetary gear reducer, and a retaining ring is detachably installed on the outside of the flange;

[0010] The internal thread of the worm wheel is matched with a wire reel, a connecting sleeve is sleeved inside the wire reel, a guide sleeve is sleeved on the connecting sleeve, at least one guide hole is opened on the circumference of the guide sleeve, and the guide sleeve is provided with a push rod mechanism for clamping the workpiece in the guide sleeve through the guide hole;

[0011] The guide sleeve is provided with a hinge interface at one end of the guide hole.

[0012] Furthermore, the push rod mechanism includes a first push rod and a second push rod of different lengths, the first push rod and the second push rod pass through their respective corresponding guide holes and extend into the hinge port, the first push rod and the second push rod are hinged with a triangular pressure arm at one end close to the corresponding hinge port, a pressure wheel is provided at one end of the triangular pressure arm, a linear movable hole is opened at the other end of the first push rod and the second push rod, a push rod is provided in the linear movable hole, and the push rod passes through the wire reel and extends to the outside of the retaining ring.

[0013] Furthermore, the push rod is provided with a pushing device between the guide sleeve and the wire reel.

[0014] Furthermore, a stop plate is provided at one end of the push rod located at the retaining ring.

[0015] Furthermore, a hinge hole is provided at the hinged position of the guide sleeve with the triangular pressure arm, and a rotating shaft is provided in the hinge hole.

[0016] Furthermore, an end of the guide sleeve away from the flange is provided with an end ring, and an introduction portion is provided on the end ring.

[0017] Furthermore, a hand wheel is provided at the other end of the worm.

[0018] In summary, the beneficial technical effects of the utility model are:

[0019] (1) The use of planetary gear reducers and servo motors to replace the original gear racks not only reduces the difficulty of part processing, but also can accurately control the size of the output torque, thereby quickly and accurately adjusting the clamping force of the triangular pressure arm on the workpiece, ensuring that the workpiece is stably clamped in the guide sleeve while preventing deformation of the workpiece due to excessive clamping force. At the same time, the use of planetary gear reducers and servo motors to control the worm gear has good self-locking properties, better stability, large output torque, smooth operation and durability.

[0020] (2) The first push rod and the second push rod of different lengths are used to increase the clamping points at different positions of the workpiece, making the clamping of the workpiece more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the utility model from another angle;

[0023] Figure 3 yes Figure 1 The structural diagram of the guide sleeve is hidden;

[0024] Figure 4 yes Figure 3 The schematic diagram of the worm gear structure is hidden;

[0025] Figure 5 It is a cross-sectional schematic diagram of the utility model;

[0026] Figure 6 It is a working schematic diagram of the utility model.

[0027] Figure numerals: 1. flange; 2. retaining ring; 3. guide sleeve; 4. worm; 5. worm wheel; 6. wire reel; 7. planetary gear reducer; 8. servo motor; 9. hand wheel; 10. first push rod; 11. second push rod; 12. triangular pressure arm; 13. pressure wheel; 14. hinge joint; 15. connecting piece; 16. end ring; 17. introduction part; 18. pushing device; 19. stop plate; 20. hinge hole; 21. push rod; 22. linear movable hole; 23. guide hole; 24. workpiece. DETAILED DESCRIPTION

[0028] The present invention will be described clearly and completely below in conjunction with the embodiments.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In the description of the embodiments, unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or it can be connected through an intermediate medium, or it can be a communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] See attached Figure 1-5 , a rear guide servo six-claw self-centering mechanism in a centerless lathe is shown, including a flange 1, a worm wheel 5 is arranged in the center of the flange 1, a worm 4 is arranged on the worm wheel 5, one end of the worm 4 is connected to a planetary gear reducer 7, a servo motor 8 is arranged on the planetary gear reducer 7, the servo motor 8 is linked to the planetary gear reducer 7 to act on the worm wheel 5 and the worm 4, when in use, the planetary gear reducer 7 and the servo motor 8 can more accurately control the torque output by the worm 4, and at the same time, the planetary gear reducer 7 and the servo motor 8 can be connected with the HMI to conveniently and quickly set the torque output each time, which is more accurate and stable than the original hydraulic drive gear rack, and also reduces the processing difficulty of the original parts, a hand wheel 9 is arranged at the other end of the worm 4, the hand wheel 9 can manually act on the worm wheel 5 and the worm 4 to rotate, the inner circle of the worm wheel 5 is installed with a wire disc 6 through a thread, the inner part of the wire disc 6 is provided with a guide sleeve 3, and three first push rods 10 and three second push rods 11 are equally arranged on the circumference of the guide sleeve 3, and the first push rod 10 and the second push rod 11 are arranged on the circumference of the guide sleeve 3. The push rods 11 are arranged in a staggered manner, that is, a second push rod 11 is provided between the two first push rods 10, the length of the first push rod 10 is greater than the length of the second push rod 11, and guide holes 23 of different lengths are provided at positions of the guide sleeve 3 corresponding to the first push rod 10 and the second push rod 11 for accommodating the first push rod 10 and the second push rod 11, and a hinge port 14 is opened and closed at a position of the guide sleeve 3 corresponding to one end of the first push rod 10 and the second push rod 11, and one end of the first push rod 10 and the second push rod 11 extends into the hinge port 14 and is hinged with a connecting piece 15, A triangular pressure arm 12 is hinged on the connecting member 15. A pressure wheel 13 is provided at a corner of the triangular pressure arm 12 that is away from the connecting member 15 and is used to abut against the surface of the workpiece 24 and reduce friction. A hinge hole 20 is provided at another corner of the guide sleeve 3, and a rotating shaft is provided in the hinge hole 20. The triangular pressure arm 12 is hinged with the guide sleeve 3 through the rotating shaft. It can be known that the first push rod 10 or the second push rod 11 can cause the triangular pressure arm 12 to rotate in the forward or reverse direction along the rotating shaft to achieve clamping of the workpiece 24 in the guide sleeve 3.

[0032] Furthermore, since the first push rod 10 and the second push rod 11 are located at different positions on the guide sleeve 3, different positions of the workpiece 24 in the guide sleeve 3 can be clamped, thus making the workpiece 24 more stable.

[0033] Furthermore, a linear movable hole 22 is formed at one end of the first push rod 10 and the second push rod 11 away from the triangular pressure arm 12, and a push rod 21 is provided in the linear movable hole 22. The push rod 21 passes through the wire reel 6, and the push rod 21 is provided with a pushing device 18 between the wire reel 6 and the guide sleeve 3. The pushing device 18 can be a nut or a gasket, and the pushing device 18 and the push rod 21 are fixed to each other. When the worm 4 is used to drive the worm wheel 5 to rotate, the worm wheel 5 further acts on the wire reel 6 to move in the direction of the push rod 21, and the wire reel 6 then moves the first push rod 10 and the second push rod 11 forward through the push rod 21, and the first push rod 10 and the second push rod 11 further act on their respective triangular pressure arms 12 to rotate along the rotating axis in the direction toward the inside of the guide sleeve 3, and the triangular pressure arm 12 clamps the workpiece 24 through the pressure wheel 13;

[0034] Furthermore, in order to prevent the wire disc 6 from rotating under the drive of the worm gear 5, a retaining ring 2 is concentrically arranged on the side of the flange 1 away from the wire sleeve, and the push rods 21 are extended to the outside of the retaining ring 2, and a stop plate 19 is arranged at one end of the push rod 21 to prevent the push rod 21 from axially rotating, which means that the push rod 21 can only move along the linear movable hole 22, and the stop plate 19 is connected to the retaining ring 2 by bolts;

[0035] Furthermore, in order to increase the stability of the triangular pressure arm 12 at the position of the pressure wheel 13, an end ring 16 is installed at the end of the guide sleeve 3 by bolts, and an introduction portion 17 for increasing the guiding property of the workpiece 24 is opened on the end ring 16;

[0036] Please refer to the attached Figure 6 , the output torque of the servo motor 8 and the planetary gear reducer 7 is set through the HMI according to the diameter of the workpiece 24 and the thickness of the pipe wall, and then the workpiece 24 to be clamped is placed in the guide sleeve 3 along the introduction part 17 of the end ring 16, and then the servo motor 8 drives the planetary gear reducer 7 to rotate, and then the planetary gear reducer 7 drives the worm 4 and the worm wheel 5 to rotate, and the worm wheel 5 further moves along the push rod 21 through the threaded linkage wire reel 6. Since the push rod 21 is located between the guide sleeve 3 and the wire reel 6 and a pushing device 18 is provided, when the wire reel 6 further drives the push rod 21 to move forward in the linear active hole 22 through the pushing device 18, the push rod 21 further acts on the first push rod 10 and the second push rod 11 to move forward along their respective guide holes 23 through the linear active hole 22, and the first push rod 10 and the second push rod 11 further act on their respective triangular pressure arms 12 to rotate along the rotating shaft, and then abuts on the workpiece 24 located in the guide sleeve 3 through the pressure wheel 13 to achieve clamping.

[0037] The above description is only a preferred specific implementation method of the present utility model, and does not limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A rear guide servo six-claw self-centering mechanism in a centerless lathe, characterized in that: The flange (1) comprises a worm wheel (5) disposed inside the flange (1), a worm (4) being matched with the worm wheel (5), a planetary gear reducer (7) being disposed at one end of the worm (4), a servo motor (8) being mounted on the planetary gear reducer (7), and a retaining ring (2) being detachably mounted on the outside of the flange (1); The worm wheel (5) is internally threadedly matched with a wire reel (6), a connecting sleeve is sleeved inside the wire reel (6), a guide sleeve (3) is sleeved on the connecting sleeve, at least one guide hole (23) is opened on the circumference of the guide sleeve (3), and the guide sleeve (3) is provided with a push rod mechanism for clamping a workpiece (24) inside the guide sleeve (3) through the guide hole (23); The guide sleeve (3) is provided with a hinge port (14) at one end of the guide hole (23).

2. The rear guide servo six-claw self-centering mechanism in a centerless lathe according to claim 1, characterized in that: The push rod mechanism comprises three first push rods (10) and three second push rods (11), the first push rods (10) and the second push rods (11) having different lengths, the first push rods (10) and the second push rods (11) passing through their respective corresponding guide holes (23) and extending into the hinge interface (14), one end of the first push rod (10) and the second push rod (11) close to the corresponding hinge interface (14) is hingedly connected with a triangular pressure arm (12), one end of the triangular pressure arm (12) is provided with a pressure wheel (13), the other end of the first push rod (10) and the second push rod (11) is provided with a linear movable hole (22), a push rod (21) is provided in the linear movable hole (22), and the push rod (21) passes through the wire reel (6) and extends to the outside of the retaining ring (2).

3. The rear guide servo six-claw self-centering mechanism in a centerless lathe according to claim 2, characterized in that: The push rod (21) is located between the guide sleeve (3) and the wire reel (6) and is provided with a pushing device (18).

4. The rear guide servo six-claw self-centering mechanism in a centerless lathe according to claim 2, characterized in that: A stop plate (19) is provided at one end of the push rod (21) located on the retaining ring (2).

5. The rear guide servo six-claw self-centering mechanism in a centerless lathe according to claim 2, characterized in that: The guide sleeve (3) is provided with a hinge hole (20) at the hinged position with the triangular pressure arm (12), and a rotating shaft is provided in the hinge hole (20).

6. The rear guide servo six-claw self-centering mechanism in a centerless lathe according to claim 2, characterized in that: An end ring (16) is provided at one end of the guide sleeve (3) away from the flange (1), and an introduction portion (17) is provided on the end ring (16).

7. The rear guide servo six-claw self-centering mechanism in a centerless lathe according to claim 1, characterized in that: A hand wheel (9) is provided at the other end of the worm (4).

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